JP5332176B2 - Image blur correction device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image fluctuation correcting apparatus configured to achieve simple and small structure. <P>SOLUTION: The image fluctuation correcting apparatus rotates, in an arcuate form, a first rotary apex angle prism 35 held in a first prism holding member 41 around a first shaft 42, which is substantially parallel to an optical axis K within a frame body 31, in a direction for canceling an amount of horizontal fluctuation by electromagnetic force generated between a first drive coil 46 and a first magnet 44 by causing electric current to flow in the first drive coil in a direction for canceling the amount of horizontal fluctuation of a picked up image. Also, the image fluctuation correcting apparatus rotates, in an arcuate form, a second rotary apex angle prism 36 held in a second prism holding member 51 around a second shaft 52, which is located 180-degree angle away from the first shaft 42, in a direction for canceling an amount of vertical fluctuation by electromagnetic force generated between a second drive coil 56 and a second magnet 54 by causing electric current to flow in the second drive coil in the direction for canceling the amount of vertical fluctuation of a picked up image. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  According to the present invention, in a frame disposed on the optical axis of a photographic lens, some of a plurality of vertical prisms are substantially along a plane orthogonal to the optical axis by electromagnetic force according to the shake amount of a captured image. The present invention relates to an image blur correction device that rotates and cancels out the shake amount to correct image blur.

  2. Description of the Related Art Conventionally, there is an optical shake correction device (image shake correction device) that can optically correct a shake amount of a captured image caused by camera shake or vibration at the time of shooting so that the subject image can be taken as an easy-to-view image without causing shake. It is applied to video cameras, electronic still cameras, still cameras, etc.

  As an example of this type of optical shake correction device, a set of a concave lens and a convex lens that are controlled in a direction to cancel out the shake amount of the captured image are provided in the video camera, and the concave lens and the convex lens are provided according to the shake amount of the captured image. Patent Document 1 below discloses a method in which at least one of convex lenses is rotated about a virtual curvature center to deflect a light beam.

  Furthermore, as another example of a shake correction device that optically corrects a shake amount of a captured image caused by camera shake or vibration at the time of shooting, the first vertical angle variable prism that rotates in the vertical direction includes a plano-concave lens and a convex flat lens. The second apex angle variable prism that rotates in the horizontal direction is composed of a plano-concave lens and a convex flat lens, and by combining the respective rotation angles of the first and second apex angle variable prisms Japanese Patent Application Laid-Open Publication No. 2004-228688 discloses a two-dimensionally variable transmission optical axis.

JP-A-6-281889 Japanese Patent Laid-Open No. 10-104678.

  By the way, in the optical shake correction apparatus disclosed in Patent Document 1 shown above, at least one of the concave lens and the convex lens is rotated around the virtual center of curvature according to the shake amount to deflect the light flux. However, according to the description of Patent Document 1 described above, for example, when the convex lens is rotated, the convex lens rotating means includes a pair of upper and lower convex lens support members that support the convex lens and a pair of upper and lower convex lens support members in the vertical direction. A pair of left and right convex lens vertical rotation members that rotate left and right, and a convex lens horizontal rotation member that is provided between the pair of left and right convex lens vertical rotation members and rotates the pair of left and right convex lens vertical rotation members in the horizontal direction; The structure of the convex lens rotating means is complicated and large because it is composed of the electromagnetic means for convex lens vertical rotation and the electromagnetic means for convex lens horizontal rotation. In other words, it is difficult to reduce the size because installation space for each component is required.

  Further, in the shake correction device using the variable apex angle prism disclosed in Patent Document 2 described above, the first and second apex angle variable prisms are rotated according to the shake amount caused by hand shake or vibration. The transmission optical axis can be varied two-dimensionally by combining the rotation angles of the first and second apex angle variable prisms. However, according to the description in Patent Document 2, the first and second When rotating the vertical angle variable prism, the lens rotating means is engaged with a rack mounted on the side wall side of the vertical angle variable prism because the pinion mounted on the motor shaft is engaged with the lens rotating means. The structure becomes large and it is difficult to reduce the size.

  Therefore, there is a demand for an image blur correction device that has a simple structure and can be reduced in size when optically correcting a shake of a captured image caused by camera shake or vibration during shooting.

The present invention has been made in view of the above problems, and is an image shake correction device that is disposed on the optical axis of an imaging lens and corrects image shake by canceling out the shake amount of a captured image, and has a substantially fan shape. A plurality of apex angle prisms whose apex direction side thickness is smaller than the thickness on the opposite side of the apex direction, and at least one or more shafts that have an axis substantially parallel to the optical axis. And a frame portion that holds at least one rotation vertex angle prism excluding at least one fixed vertex angle prism fixed without rotating around the axis among the plurality of vertex angle prisms, and the frame portion and a bearing portion which is perpendicular to the articulation and and the rotation angle prism, the provided for each rotational angle prism integrally with the rotary apex angle prism the shaft is fitted to the bearing portion Rotate in a circular arc around a predetermined movable angle range around the axis At least one prism holding member Noh, a magnet magnetized in the rotor yoke was fixed on the opposite side and the N pole and S pole the frame portion and in the bearing portion of the prism holding member, the frame member And a drive coil and a back yoke wound around the magnet, and applying a current to the drive coil for rotating the prism holding member in a direction in which the amount of shake is offset Then, the image blur correction device is characterized in that the rotating vertical angle prism is rotated integrally with the prism holding member by the electromagnetic force generated between the magnet and the magnet.

According to a second aspect of the present invention, in the image blur correction device according to the first aspect of the present invention , the non-energized drive coil at a reference position where the prism holding member holding the rotary apex angle prism does not rotate. By applying an urging force so that the amount of magnetic flux between the north and south poles of the magnet is substantially equal, the pivotal angle prism held by the prism holding member becomes the midpoint of the predetermined movable angle range. An image blur correction apparatus characterized by maintaining a position .

According to a third aspect of the present invention, in the image blur correction device according to the first or second aspect of the invention, the plurality of vertical angle prisms are a first rotation held by the fixed vertical angle prism and the prism holding member. and a apex angle prism and the second rotation angle prism the prism holding member is rotatably supported to the first shaft which is horizontally provided substantially in parallel to the optical axis, holding the first rotation apex angle prism A first prism holding member that holds the second pivotal apex prism supported by a second shaft that is horizontally disposed at 180 degrees around the optical axis and parallel to the first shaft. An image blur correction device comprising a second prism holding member.

According to a fourth aspect of the present invention, there is provided an image shake correction apparatus that is disposed on the optical axis of the image pickup lens and corrects the image shake by canceling out the shake amount of the picked-up image. A plurality of apex angle prisms having a thickness smaller than the thickness on the opposite side of the apex direction, at least one or more shaft portions having an axis substantially parallel to the optical axis, and the plurality of apex portions of corner prism, a frame portion for holding at least one pivot angle prism except at least one fixed apex angle prism is fixed without rotating about said axis times, connecting to and the times in the frame portion and a bearing portion which is perpendicular to the moving angle prism, the provided for each rotational angle prism, the axis Mate around the said axis integrally with the rotation angle prism the bearing portion at least one pre-rotatable in an arc shape over a predetermined movable angular range Te A magnet holding member, a rotor yoke fixed to the opposite side of the frame portion in the bearing portion of the prism holding member, a magnet magnetized to the N pole and the S pole, and an outer peripheral portion of the frame body And a drive coil and a back yoke wound around the magnet, and an outer peripheral portion of the image shake correction device so as to face the magnetic gap portion of the magnet at a reference position where the prism holding member does not rotate. The magnetic gap portion of the magnet is detected by the Hall element when the rotation angle of the rotation vertex angle prism rotated integrally with the prism holding member is detected by the Hall element. The image blur correction device is characterized in that a predetermined gap width is set so that the magnetic flux density gradually increases from the center toward the outside.

According to a fifth aspect of the present invention, there is provided an image blur correction apparatus that is disposed on the optical axis of the imaging lens and corrects the image blur by canceling out the shake amount of the captured image. A plurality of apex angle prisms whose thickness is smaller than the thickness on the opposite side of the apex direction, at least one or more shafts arranged side by side with one axis substantially parallel to the optical axis, and the plurality Yes of the first frame portion for holding the first rotation apex angle prism of apex angle prism, and a first bearing portion which is perpendicular to the concatenated to the first frame portion and the first rotating apex angle prism Then, the first shaft is fitted into the first bearing portion, and the first shaft can be rotated in a circular arc shape over a predetermined movable angle range around the shaft integrally with the first rotation angle prism. One prism holding member and the first prism holding member. And a second frame portion for holding the second rotational angle prism and a second bearing portion which is perpendicular to the concatenated to the second frame portion and the second rotation angle prism and the second bearing portion A second prism holding member that is fitted in the first shaft to be pivotable in an arc shape over a predetermined movable angle range integrally with the second rotation vertical angle prism around the one shaft. And a first electromagnetic actuator and a second electromagnetic actuator for rotating the first and second prism holding members respectively holding the first and second apex angle prisms in a direction in which the shake amount is canceled. Is an image blur correction apparatus.

According to a sixth aspect of the present invention, in the image shake correction apparatus according to the fifth aspect of the present invention, the first electromagnetic actuator includes the first frame portion on the side opposite to the first bearing portion of the first prism holding member. A first drive coil substrate having a first drive coil is attached to a component attachment portion formed in a connected manner, and a first magnet and a first yoke are opposed to the first drive coil substrate, and the first frame is disposed in the first frame. The second electromagnetic actuator is fixed to the first frame with the first drive coil substrate sandwiched so that the first back yoke faces the first yoke. A second drive coil substrate having a second drive coil is attached to a component attachment portion formed on the side opposite to the second bearing portion of the second prism holding member and connected to the second frame portion; and The second wheel drive With a second magnet and the second yoke and the coil substrate and the counter is fixed to the other surface side of the second frame body such that said second back yoke opposed to the second yoke second driving coil An image blur correction apparatus characterized by being fixed to the second frame with a substrate interposed therebetween.

According to a seventh aspect of the present invention, in the image blur correction device according to the fifth aspect of the present invention, the first electromagnetic actuator includes the first frame portion on the side opposite to the first bearing portion of the first prism holding member. A first yoke and a first magnet are attached to a component attachment portion formed in a connected manner, and a first drive coil substrate having a first drive coil and the first back yoke are opposed to the first magnet. The second electromagnetic actuator is formed to be connected to the second frame portion on the side opposite to the second bearing portion of the second prism holding member. A second yoke and a second magnet are attached to the component attachment portion, and a second drive coil substrate having a second drive coil facing the second magnet and a second back yoke are in the second frame. Being fixed to the other side An image blur correction apparatus, characterized.

According to an eighth aspect of the present invention, in the image blur correction device according to the sixth or seventh aspect, the first and second prism holding members respectively holding the first and second rotation apex prisms do not rotate. By applying a biasing force so that the amount of magnetic flux between the north and south poles of the first and second magnets is substantially equal to the first and second drive coils that are not energized at the reference position, The said 1st, 2nd rotation apex angle prism each hold | maintained at the said 1st, 2nd prism holding member respectively maintains the middle point position of the said predetermined movable angle range, respectively. The image blur correction apparatus described .

According to a ninth aspect of the present invention, in the image shake correction apparatus according to any one of the sixth to eighth aspects of the present invention, a first angle for detecting a rotation angle of the first rotation apex angle prism on the first drive coil substrate. A hall element is installed opposite to the first magnet, and a second hall element for detecting the rotation angle of the second rotation apex angle prism is opposed to the second magnet on the second drive coil substrate. The image blur correction apparatus is characterized in that it is installed in the same manner.

According to the image shake correction apparatus of the first aspect of the invention, some of the plurality of apex prisms in the frame body arranged on the optical axis of the photographing lens is subjected to the optical axis by electromagnetic force according to the shake amount of the captured image. Is rotated along a plane orthogonal to the plane, and when the image blur correction is performed by canceling out the shake amount, the rotation vertical angle prism to be rotated is held on the frame portion of the prism holding member, and The shaft that is connected to the frame portion and orthogonal to the rotation vertical angle prism is fitted with a shaft that is horizontally disposed in the frame so as to be substantially parallel to the optical axis, so that the rotation vertical angle prism is integrated with the prism holding member. It can be rotated in an arc shape over a predetermined movable angle range around the axis, and is magnetized to the rotor yoke, the N pole, and the S pole on the opposite side of the frame portion in the bearing portion of the prism holding member. In addition, the drive coil and the bar are attached to the outer peripheral part of the frame body. Since the image blur correction apparatus is configured by attaching the que yoke, it is possible to provide an image blur correction apparatus that is simple in structure and can be downsized, and further, an electric current for rotating the prism holding member in a direction in which the blur amount cancels out. The rotating apex angle prism held by the prism holding member is rotated in an arc shape in the direction that cancels the shake amount around the axis by the electromagnetic force generated between the magnet and the drive coil. A good subject image can be obtained.

Further, according to the image blur correction device of the second invention, at the reference position where the prism holding member holding the rotating apex angle prism does not rotate, the N-pole and S-pole of the magnet with respect to the non-energized driving coil. By applying an urging force so that the amount of magnetic flux becomes substantially equal, the pivotal angle prism held by the prism holding member at the reference position is not affected by the shooting posture of the video camera, but within a predetermined movable angle range. Can be held at the midpoint position.

  Further, according to the image blur correction device of the third invention, the plurality of apex angle prisms are arranged horizontally with the fixed apex angle prism fixed in the frame and the fixed apex angle prism in the frame, respectively. The first and second pivotal apex prisms rotate in accordance with the lateral shake amount and the vertical shake amount, respectively, and are supported by a first shaft that is horizontally disposed in the frame substantially parallel to the optical axis. The first prism holding member holds the first pivotal apex angle prism, and the second prism holding member pivotally supported by the second shaft that is horizontally disposed at 180 ° apart from the first shaft in the frame. Since the second pivotal apex angle prism is held, the constituent members can be arranged vertically symmetrically in the frame body, which makes the structure of the image blur correction device simple and miniaturizable.

Further, according to the image shake correction apparatus of the fourth aspect of the invention, some of the plurality of apex angle prisms are electromagnetically actuated in the frame disposed on the optical axis of the taking lens according to the shake amount of the captured image. By rotating substantially along a plane orthogonal to the optical axis, and canceling out the shake amount and correcting image shake, the turning vertical angle prism to be turned is held on the frame portion of the prism holding member, and, turning apex angle integrally with the prism holding member substantially parallel to fitted to the axis of the horizontally provided with the optical axis to the frame with respect to the bearing portion which is perpendicular to the articulation to and rotates apex angle prism to the frame portion The prism can be rotated in a circular arc shape around a predetermined movable angle range around the axis, and the rotor yoke, the N pole and the S pole are magnetized on the opposite side of the frame portion in the bearing portion of the prism holding member. A magnet magnetized across the gap is fixed, and the outside of the frame is fixed. It is attached and a drive coil and a back yoke at the site side, attach the Hall element constitutes an image blur correction device on the outer peripheral portion side of the frame so as to face the magnetic gap of the magnet, the prism holding member and times together the rotation angle of the rotation angle prism where the dynamic angle prism is rotated to be detected by the Hall element, the magnetic gap of the magnet, as the magnetic flux density is gradually increased toward the outer side from the center Since the gap width is set to a predetermined value, the prism holding member has a large linear section in which the output of the Hall element changes linearly over a predetermined movable angle range when the prism holding member rotates. Even if it rotates over a large angle, the rotation angle of the rotation apex angle prism held by the prism holding member can be reliably detected.

Further, according to the image shake correction apparatus of the fifth aspect of the invention, some of the plurality of apex angle prisms are subjected to electromagnetic force in accordance with the shake amount of the captured image within the frame disposed on the optical axis of the photographing lens. The first and second pivot apex angles respectively held by the first and second prism holding members are rotated substantially along the plane orthogonal to the optical axis to cancel the shake amount and correct the image shake. Since the prism is rotated in an arc shape over a predetermined movable angle range around a common axis, the number of parts can be reduced with respect to the image blur correction device by using the same axis. Reduction can be achieved.

According to the image blur correction apparatus of the sixth aspect of the invention, the first and second electromagnetic actuators include the first and second drive coil substrates having the first and second drive coils on the first and second prism holding members. Since the first and second magnets, the first and second yokes, and the first and second back yokes are fixed to each other in the frame body, the first and second electromagnetic actuators are used for the first. The first and second rotary apex prisms respectively held by the second prism holding members can be reliably rotated, and the first and second drive coil substrates are respectively attached to the first and second prism holding members. By mounting, it is possible to reduce the size and weight of the image blur correction device.

According to the image shake correcting apparatus of the seventh aspect of the invention, the first and second electromagnetic actuators have the first and second yokes and the first and second magnets attached to the first and second prism holding members, respectively. In addition, since the first and second drive coil substrates having the first and second drive coils and the first and second back yokes are fixed in the frame, the first and second electromagnetic actuators The first and second pivotal apex prisms respectively held by the first and second prism holding members can be reliably rotated, and the first and second drive coil substrates are fixed to the inside of the frame. Since the second drive coil substrate does not move, disconnection or the like does not occur.

Further, according to the image shake correcting apparatus of the eighth aspect of the invention, the first and second prism holding members respectively holding the first and second rotation apex prisms are deenergized at the reference positions where the first and second prism holding members do not rotate. By applying an urging force so that the amount of magnetic flux between the N pole and the S pole of the first and second magnets is substantially equal to the second drive coil, it is not affected by the shooting posture of the video camera, The first and second apex angle prisms held respectively by the first and second prism holding members at the reference position can be held at the midpoint position of a predetermined movable angle range.

Further, according to the image shake correcting apparatus of the ninth invention, the first and second Hall elements for detecting the rotation angles of the first and second apex angle prisms are provided on the first and second drive coil substrates. Since each is installed facing the second magnet, the rotation angle of the first and second rotation apex angle prisms can be reliably detected.

  Hereinafter, an image blur correction apparatus according to an embodiment of the present invention will be described in detail in the order of Embodiment 1 and Embodiment 2 with reference to FIGS.

FIG. 1 is a configuration diagram showing an overall configuration of a video camera to which an image shake correction apparatus according to a first embodiment of the present invention is applied;
FIGS. 2A, 2B, and 2C are diagrams showing a fixed vertex angle prism, a first pivot angle prism, and a second pivot angle provided in the image shake correction apparatus according to the first embodiment of the present invention. Front view, side view, perspective view for explaining angular prism,
FIGS. 3A and 3B are views of a fixed apex angle prism, a first rotation apex angle prism, and a second rotation apex angle prism provided in the image shake correction apparatus according to the first embodiment of the present invention. A diagram for explaining the operating principle of light beam deflection,
FIG. 4 is an exploded perspective view showing the image shake correcting apparatus according to the first embodiment of the present invention in an exploded manner,
FIG. 5 is an enlarged longitudinal sectional view showing the image shake correcting apparatus according to the first embodiment of the present invention.
FIG. 6 is a diagram schematically illustrating the rotation operation and the rotation position detection operation of the first and second rotation vertex prisms in the image shake correction apparatus according to the first embodiment of the present invention. ,
FIG. 7 is a diagram illustrating the output of the first angle sensor or the second angle sensor using a Hall element in the image shake correction apparatus according to the first embodiment of the present invention.

  In the video camera 10 </ b> A shown in FIG. 1, the image blur correction device 30 according to the first embodiment of the present invention is attached to the front portion of the lens barrel 11. In the image blur correction device 30 of the first embodiment, the frame body 31 is divided into two parts, a front frame body 32 and a rear frame body 33. In this cylindrical frame 31, a fixed apex prism 34 fixed on the subject side, and a plane perpendicular to the optical axis K by electromagnetic force according to the lateral shake amount (or vertical shake amount) of the video camera 10A are substantially provided. Along the first angle holding prism 41 integrally with the first prism holding member 41 over a predetermined angular range, and a first turning apex angle prism 35 turning around a first axis 42 substantially parallel to the optical axis K, and the video camera 10A. The second prism holding member 51 and the second prism holding member 51 are substantially parallel to the optical axis K over a predetermined angle range along a plane orthogonal to the optical axis K by electromagnetic force according to the vertical shake amount (or lateral shake amount). A second rotation apex angle prism 36 that rotates about the two axes 52 is horizontally provided in the above order.

  At this time, one of the first and second rotation apex angle prisms 35 and 36 is rotated according to the lateral shake amount of the video camera 10A, and the other according to the vertical shake amount of the video camera 10A. What is necessary is just to rotate. In the first embodiment, the case where the first rotation vertex prism 35 is rotated according to the lateral shake amount and the second rotation vertex prism 36 is rotated according to the longitudinal shake amount will be described below. .

  Further, in the lens barrel 11, a front lens (group) 12 for photographing a subject along the optical axis K and a subject image photographed by the front lens (group) 12 are zoomed. The zoom lens (group) 13 is movable in the optical axis direction, the iris 14 is openable and closable to adjust the amount of light of the subject image, and the focus is movable in the optical axis direction to adjust the focus of the subject image. A lens (group) 15 and a solid-state imaging device 16 that photoelectrically converts a subject image are arranged in this order from the subject side. At this time, the image blur correction device 30 of the first embodiment and the members 12 to 16 in the lens barrel 11 have the same optical axis.

  In addition, in the video camera 10A, a control unit 21 that controls the whole and a lateral shake amount that detects a lateral shake amount when the video camera 10A shakes in the left-right direction with respect to the Y axis orthogonal to the optical axis K. A detector 22, a vertical shake amount detector 23 that detects a vertical shake amount when the video camera 10A vertically shakes with respect to an X axis that is orthogonal to the optical axes K and Y, and an image shake correction device 30. A first angle sensor 24 for detecting the rotation angle of the first rotation apex angle prism 35 that rotates in accordance with the lateral shake amount, and a first angle sensor 24 that rotates in the image shake correction device 30 according to the vertical shake amount. The second angle sensor 25 for detecting the rotation angle of the two rotation apex angle prism 36 and the first and second rotation apex angle prisms 35 and 36 provided in the image blur correction device 30 are set within a predetermined angle range. And a rotation apex angle prism drive circuit 26 that rotates over the entire area. .

  At this time, the horizontal shake amount detector 22 and the vertical shake amount detector 23 are configured by a known angular velocity sensor such as a gyro, and the horizontal direction (X-axis direction) and the vertical direction (Y-axis direction) of the video camera 10A. , Each angular velocity caused by the lateral shake and the vertical shake is detected, and the lateral shake amount and the vertical shake amount corresponding to each angular velocity are input to the control unit 21. .

  Each of the first and second angle sensors 24 and 25 uses Hall elements that convert the change in magnetic flux density into a voltage, and the first and second angle apex prisms 35 and 36 holding the first and second rotation apex angle prisms 35 and 36, respectively. By detecting the magnetic flux densities of the first and second magnets 44 and 54 attached to the second prism holding members 41 and 51 respectively with the Hall elements 24 and 25 and inputting the detection results to the control unit 21. Since the respective rotation positions of the first and second rotation apex angle prisms 35 and 36 are controlled, the first and second rotation apex angle prisms 35 and 36 are initially rotated at the initial time when the first and second rotation apex angle prisms 35 and 36 are not rotated. The two-rotation vertical angle prisms 35 and 36 can be brought to their respective reference positions.

  Further, the rotation vertical angle prism drive circuit 26 supplies each coil drive current to first and second drive coils 46 and 56 to be described later according to the lateral shake amount and the vertical shake amount.

  Here, as shown in FIGS. 2A and 2B, a fixed apex angle prism 34 and a first rotation that are horizontally disposed in order from the subject side to the rear side in the image shake correction apparatus 30 of the first embodiment. The apex angle prism 35 and the second rotation apex angle prism 36 are both formed into a substantially fan-shaped shape that is the minimum necessary for the photographing screen, using transparent optical glass or a transparent resin material, and The prisms 34 to 36 have the apex angles set to the same value, and the apex angle direction is formed with a small thickness, while the opposite side of the apex angle direction is formed with a thick thickness. It is.

  At this time, as shown in FIG. 2C, when viewed from the subject side, the apex angle direction of the fixed apex angle prism 34 to be fixed is always directed to the lower right (for example, −45 ° direction). Is set to

  In addition, the substantially fan-shaped first rotation apex angle prism 35 is held in the concave frame portion 41a of the first prism holding member 41 on the lower end side and the left and right side surfaces, and is formed in the concave shape. A first shaft 42 is fitted to a cylindrical bearing portion 41b provided perpendicular to the center of the frame portion 41a, and the first shaft 42 can be rotated in an arc shape around the first shaft 42. The apex angle direction of the apex angle prism 35 is set along the Y axis orthogonal to the optical axis K at the initial stage, and the apex angle direction of the first rotation apex angle prism 35 is relative to the Y axis according to the lateral deflection amount. Thus, it is rotated so as to incline over a predetermined angle range in the left and right directions.

  Further, the upper end side and the left and right side surfaces of the second rotary apex angle prism 35 having a substantially fan shape are held in the concave frame portion 51a of the second prism holding member 51, and the concave shape. A second shaft 52 is fitted to a cylindrical bearing portion 51b provided perpendicular to the center of the frame portion 51a, and the second shaft 52 can be rotated in an arc shape around the second shaft 52. The apex angle direction of the apex angle prism 36 is initially set along the X axis orthogonal to the optical axis K and the Y axis, and the apex angle direction of the second rotation apex angle prism 36 is set to X according to the amount of vertical deflection. It rotates so as to incline over a predetermined angular range in the vertical ± direction with respect to the axis.

  Accordingly, the vertical directions of the first and second rotary vertical prisms 35 and 36 are orthogonal to each other.

  Here, the operation principle of light beam deflection by the fixed apex angle prism 34, the first rotation apex angle prism 35, and the second rotation apex angle prism 36 will be described with reference to FIGS. 3 (a) and 3 (b). .

As shown in FIG. 3A, when the fixed apex angle prism 34, the first rotation apex angle prism 35, and the second rotation apex angle prism 36 are in the initial state, vector θ ₀ , vector θ ₁ , vector θ ₂ Are the image shift vectors corresponding to the apex angle direction of the fixed apex angle prism 35, the apex angle direction of the first rotation apex angle prism 35, and the apex angle direction of the second rotation apex angle prism 36, respectively. Yes.

In this initial state, Vectorshita ₁ and Vectorshita ₂ combined vector Vectorshita _{1 + 2} fixed apex angle prism 34 and the first to counteract the Vectorshita ₀ and each apex angle direction of the second rotation angle prism 35, 36 is set As a result, the three apex angle prisms 34, 35 and 36 are equivalent to a parallel plate. Accordingly, since the incident angle of the light beam from the subject is the same as that of the light beam emitted from the apex angle prism and the light beam is not refracted, the image A of the subject on the incident optical axis is emitted as it is without moving. .

Next, FIG. 3B shows that the first rotation apex angle prism 35 is rotated, for example, by + α ₁ according to the lateral shake amount from the initial state, and the second rotation apex angle prism is set according to the vertical shake amount. For example, a state where 36 is rotated by + α ₂ is shown.

During this rotation, the first rotation apex angle prism 35 moves the image shift vector from the vector θ ₁ to the vector θ ′ ₁ , and the second rotation apex angle prism 36 changes the image shift vector from the vector θ ₂ to the vector θ ′ ₂ . since moving, the composite vector vectorθ _{'1 + 2} of _{vectorθ' 1} and vectorθ _'2 is not in alignment with respect Vectorshita ₀ shown in FIG. 3 (a), light is refracted.

In this case, a vector variation Vectorshita _a first rotation apex angle prism 35, a combined vector Vectorshita synthesized by translating the vector variation Vectorshita _b of the second rotation angle prism 36 is obtained, the synthesis If the components of the vector vector θ are θX and θY, the subject image A moves to the subject image A ′ in the first quadrant of the XY coordinates. This state is enlarged and displayed on the right side of FIG.

  As described above, the first rotation apex angle prism 35 is rotated over a predetermined angular range in the left and right directions with respect to the Y axis according to the lateral deflection amount, and the second rotation apex angle prism 36 is longitudinally moved. If the subject image A can be appropriately moved in the first to fourth quadrants of the XY coordinates by rotating it over a predetermined angular range in the vertical ± direction with respect to the X axis according to the shake amount, the video camera Even if the horizontal shake and the vertical shake occur in 10A (FIG. 1), the subject image A moves in a direction that cancels the horizontal shake direction and the vertical shake direction so that the horizontal shake and the vertical shake can be canceled. A subject image is obtained.

  Next, the present invention is configured by combining the first and second electromagnetic actuators for applying a rotation operation to the first and second rotation apex angle prisms 35 and 36 based on the above-described principle of light beam deflection. A specific configuration of the image shake correction apparatus 30 according to the first embodiment will be described with reference to FIGS. 4 and 5.

  As shown in FIGS. 4 and 5, in the image blur correction device 30 according to the first embodiment of the present invention, the frame body 31 formed using a black resin material includes two front frame bodies 32 and a rear frame body 33. The frame body 31 is integrally fastened in a cylindrical shape by fitting the abutting surfaces of the front frame body 32 and the rear frame body 33 with each other and fitting which will be described later.

The aforementioned front frame body 32 is integrally formed of a disk-shaped front surface 32a and a cylindrical surface 32b along the periphery of the front surface 32a, and the rear surface side of the cylindrical surface 32b is opened. In addition, a light passage hole 32a ₁ for allowing light from the subject to pass through is formed in a rectangular shape in the central portion of the front surface 32a, and a pair of cutout portions 32b ₁ and 32b above and below the cylindrical surface 32b. (32b ₂ ... Only shown in FIG. 5) is notched with a predetermined width, and a pair of claw portions 33b ₃ and 33b _{4 of} the rear frame 33 (described later) are engaged with the left and right sides of the cylindrical surface 32b. A pair of claw engaging portions 32b ₃ (32b ₄ ... Not shown) is formed by being retracted one step from the cylindrical surface 32b.

The fixed apex angle prism 34 is fixed to the subject side while facing the light passage hole 32a ₁ inside the front frame 32. At this time, the apex angle direction of the fixed apex angle prism 34 is first. As described with reference to FIG. 2C, it is always directed to the lower right (for example, in the direction of −45 °).

The rear frame body 33 includes a disc-shaped rear surface 33a, a cylindrical surface 33b having the same diameter as the cylindrical surface 32b of the front frame body 32 along the periphery of the rear surface 33a, and the front side of the cylindrical surface 33b. The cylindrical surface 33c is integrally formed with a small-diameter cylindrical surface 33c that is slightly smaller in diameter than the cylindrical surface 33b, the front surface side of the small-diameter cylindrical surface 33c is opened, and the central portion of the rear surface 33a is opened from the subject. A light passage hole 33a ₁ is formed to pass through in a circular shape, and a pair of notches 33b ₁ and 33b ₂ are notched with a predetermined width above and below the cylindrical surface 32b. Further, a pair of claw portions 33b ₃ and 33b ₄ are formed on the left and right sides of the cylindrical surface 33b so as to protrude toward the pair of claw engaging portions 32b ₃ and (32b ₄ ..., Not shown) of the front frame body 32. ing.

The front frame body with the pair of upper and lower cutout portions 32b ₁ and (33b ₂ ) of the front frame body 32 and the pair of upper and lower cutout portions 33b ₁ and 33b _{2 of} the rear frame body 33 facing each other. The small-diameter cylindrical surface 33c of the rear frame 33 is fitted inside the cylindrical surface 32b of the rear frame 33 so that the pair of left and right claws 33b ₃ and 33b ₄ of the rear frame 33 are paired with the left and right claws of the front frame 32. When engaged with 32b ₃ , (32b ₄ ), the frame body 31 is fastened integrally.

  In addition, a first shaft portion having a first shaft 42 substantially parallel to the optical axis K is laterally provided at a lower inner peripheral portion in the frame body 31 in which the front frame body 32 and the rear frame body 33 are fastened, and In the frame 31, a first prism holding member 41, in which a first rotating apex angle prism 35 is integrally mounted facing the fixed apex angle prism 34, has a predetermined angle around the first axis 42 described above. At this time, the vertical angle direction of the first rotation vertical angle prism 35 is aligned with the Y axis at the initial time as described above with reference to FIG. ing.

At this time, the first prism holding member 41 is integrally formed by connecting the concave frame portion 41a and the cylindrical bearing portion 41b using a black resin material. A lens mounting portion corresponding to the lens thickness is formed inside, and the lower end side and the left and right side surfaces of the first rotation apex angle prism 35 are held with an adhesive, and the lower portion of the concave frame portion 41a. A cylindrical bearing portion 41b connected to the center and projecting downward is formed in a cylindrical shape so as to be orthogonal to the first rotation apex angle prism 35, and has two oilless metals 41b ₁ (FIG. 5 only). And is pivotally attached to the first shaft 42 by fitting.

  In addition, a semi-cylindrical first rotor yoke 43 is fixed using an adhesive along the lower outer periphery on the opposite side to the concave frame portion 41a in the cylindrical bearing portion 41b of the first prism holding member 41. In addition, a first magnet 44 magnetized in the thickness direction with an N pole 44a and an S pole 44b sandwiched between the magnetic gap portions 44c is fixed to the outside of the first rotor yoke 43 with an adhesive.

On the other hand, the first insulating coil holder 45 is sandwiched between the notch 32b ₂ below the front frame 32 and the notch 33b ₂ below the rear frame 33, which is the outer peripheral part below the frame 31. The first drive coil 46 is fixed on the first insulating coil holder 45 by an adhesive while being wound in a square shape, and the lead wire of the first drive coil 46 is It is soldered to a first flexible printed wiring board 47 described later.

  The first rotor yoke 43 and the first magnet 44 fixed along the lower outer periphery of the cylindrical bearing portion 41b of the first prism holding member 41 in the hollow portion inside the first drive coil 46 wound in a square shape. Has entered. Therefore, the first drive coil 46 is wound so as to surround the first rotor yoke 43 and the first magnet 44.

  Further, the first angle sensor 24 is soldered to the first flexible printed wiring board 47 disposed on the back side of the first insulating coil holder 45 by using a Hall element. The magnetic coil holder 45 enters a central square hole 45a that penetrates the central portion of the magnetic coil holder 45 and faces the magnetic gap portion 44c of the first magnet 44 with a gap therebetween.

  Further, a first back yoke 48 is fixed to the back surface of the first flexible printed circuit board 47 with an adhesive, and the first back yoke 48 is greatly drilled on the back surface side of the first insulating coil holder 45. It is fitted in the outer square hole 45b (only FIG. 5 is shown).

  Accordingly, the first electromagnetic actuator for rotating the first rotation vertex prism 35 held by the first prism holding member 41 includes the first rotor yoke 43 fixed to the rotatable first prism holding member 41 and The first magnet 44 is composed of a first drive coil 46 and a first back yoke 48 fixed in the frame 31.

  In addition, a second shaft portion having a second shaft 52 that is substantially parallel to the optical axis K and that is substantially parallel to the first shaft 42 and spaced apart from the first shaft 42 by the upper inner peripheral portion in the frame 31 is provided horizontally, and In the frame 31, a second prism holding member 51, in which the second rotating apex angle prism 36 is integrally mounted so as to face the first rotating apex angle prism 35, is centered on the second axis 52 described above. In this case, the apex angle direction of the second apex angle prism 36 is X at the initial time as described above with reference to FIG. Along the axis.

At this time, like the first prism holding member 41, the second prism holding member 51 is also integrally formed by connecting the concave frame portion 51a and the cylindrical bearing portion 51b using a black resin material. In addition, a lens mounting portion corresponding to the thickness of the lens is formed inside the concave frame portion 51a, and the upper end portion side and the left and right side surfaces of the second rotation apex angle prism 36 are held using an adhesive. A cylindrical bearing portion 51b that is connected to the upper center of the concave frame portion 51a and protrudes upward is formed in a cylindrical shape so as to be orthogonal to the second rotation apex angle prism 36, and two in the inside. The oilless metal 51b ₁ (shown only in FIG. 5) is fitted and pivotally attached to the second shaft 52.

  In addition, a semi-cylindrical second rotor yoke 53 is fixed with an adhesive along the upper outer periphery on the opposite side to the concave frame portion 51a in the cylindrical bearing portion 51b of the second prism holding member 51. At the same time, a second magnet 54, which is magnetized in the thickness direction with the magnetic gap 54c sandwiched between the N pole 54a and the S pole 54b, is fixed to the outside of the second rotor yoke 53 using an adhesive.

On the other hand, above the second insulating coil holder 55 between the upper notch 33b ₁ of the upper notch 32 b ₁ and Kowakutai 33 of the front frame body 32 serving as the outer peripheral portion of the frame body 31 is sandwiched The second drive coil 56 is fixed on the second insulating coil holder 55 by an adhesive while being wound in a square shape, and the lead wire of the drive coil 56 will be described later. Soldered to the second flexible printed wiring board 57.

  Then, the second rotor yoke 53 and the second magnet 54 fixed along the upper outer periphery of the cylindrical bearing portion 51b of the second prism holding member 51 in the hollow portion inside the second drive coil 56 wound in a square shape. I have entered. Therefore, the second drive coil 56 is wound so as to surround the second rotor yoke 53 and the second magnet 54.

  The second angle sensor 25 is soldered to the second flexible printed wiring board 57 disposed on the back side of the second insulating coil holder 55 by using a Hall element. The second angle sensor 54 is a second insulating sensor. The magnetic coil holder 55 enters a central square hole 55a that penetrates the central portion of the magnetic coil holder 55 and faces the magnetic gap portion 54c of the second magnet 54 with a gap therebetween.

  Further, a second back yoke 58 is fixed to the back surface of the second flexible printed wiring board 57 with an adhesive, and the second back yoke 58 is greatly drilled on the back surface side of the second insulating coil holder 55. The outer square hole 55b is fitted.

  At this time, the first and second flexible printed wiring boards 47 and 57 to which the first and second drive coils 46 and 56 are soldered are both drawn out from the rear frame 63 side. Since the first and second flexible printed wiring boards 47 and 57 do not move, disconnection or the like does not occur.

  Therefore, the second electromagnetic actuator for rotating the second rotation vertex prism 36 held by the second prism holding member 51 includes the second rotor yoke 53 fixed to the rotatable second prism holding member 51 and The second magnet 54 is composed of a second drive coil 56 and a second back yoke 58 fixed in the frame 31.

  Furthermore, in the image shake correction apparatus 30 of the first embodiment configured as described above, the first and second prism holding members 41 and 51 holding the first and second rotation vertex angle prisms 35 and 36, respectively, are frame bodies. Since each of the cylindrical bearings of the first and second prism holding members 41 and 51 is pivotally supported by first and second shafts 42 and 52 which are laterally provided at an inner peripheral portion of 31 at a distance of 180 °. Since the axial spans of the portions 41b and 51b can be made longer, the angle variation of the first and second rotary apex angle prisms 35 and 36 can be reduced. In addition, the constituent members can be arranged vertically symmetrically in the frame body 31 and the first and second electromagnetic actuators are mounted at positions opposed to each other by 180 °, so that they are less affected by magnetism. Therefore, it becomes easy to mount a magnetic circuit for driving near the rotation center, and there is a merit that the cost can be reduced by downsizing the first and second magnets 44 and 54, and the image blur correction device 30 can be reduced. The structure is simple and downsizing is possible.

  Next, in the image shake correction apparatus 30 according to the first embodiment configured as described above, the rotation operation and the operation of detecting the rotation position of the first and second rotation apex angle prisms 35 and 36 will be described with reference to FIGS. This will be described with reference to FIG.

  In the state shown in FIG. 6, the first prism holding member 41 holding the first rotating apex angle prism 35 and the second prism holding member 51 holding the second rotating apex angle prism 36 are vertically moved 180 degrees. It is schematically shown by being pivotally supported by first and second shafts 42 and 52 that are laterally spaced apart from each other, but the first and second pivotal vertical prisms 35 and 36 do not overlap each other. It is arrange | positioned before and behind in the frame 31. FIG.

Here, as shown in FIG. 6, the first prism holding member 41 holding the first rotation vertical angle prism 35 has the first shaft 42 in the oilless metal 41b ₁ fitted into the cylindrical bearing portion 41b. The first rotor yoke 43 and the first magnet 44, which are fitted and fixed along the lower outer periphery of the cylindrical bearing portion 41b of the first prism holding member 41, are located at the lower outer peripheral portion in the frame 31. Since it has entered the cavity inside the first drive coil 46 fixed on the attached first insulating coil holder 45, the first drive at the reference position where the first rotation vertical prism 35 does not rotate. When the image blur correction operation is not performed without energizing the coil 46, the first rotor yoke 43, the first magnet 44, and the first back yoke 48 form a magnetic loop, but the non-energized first drive. Coil 46 On the other hand, since the urging force works so that the amount of magnetic flux between the N pole 44 a and the S pole 44 b of the first magnet 44 is substantially equal, the first prism holding member 41 is formed of the magnetic gap portion 44 c of the first magnet 44. Since the midpoint position α ₀ of the movable angle range of ± α ₁ is maintained across the center, the first prism holding member 41 is not affected by the shooting posture of the video camera 10A (FIG. 1) in the initial state. it is possible to hold the first rotational apex angle prism 35 which is held in the middle position alpha ₀ of predetermined movable angular range ± alpha _1.

  Thereafter, in order to perform an image blur correction operation corresponding to the lateral shake amount of the captured image with respect to the first rotation vertical angle prism 35, the first prism holding member 41 is moved in a direction in which the lateral shake amount of the captured image cancels out. When a current for rotating the held first rotation apex angle prism 35 is applied to the first drive coil 46, between the first drive coil 46 and the N pole 44 a (or S pole 44 b) of the first magnet 44. Due to the generated electromagnetic force, the first prism holding member 41 is attracted toward the N pole 44a (or S pole 44b) side of the first magnet 44, so that the first prism holding member 41 swings around the first shaft 42. The first rotation apex angle prism 35 can be rotated integrally with the first prism holding member 41 to rotate in a circular arc shape by a predetermined amount according to the amount.

  Further, the first angle sensor 24 soldered to the first flexible printed wiring board 47 disposed on the back surface side of the first insulating coil holder 45 using a Hall element is a reference that the first prism holding member 41 does not rotate. In position, it faces a magnetic gap portion 44 c formed at a central portion of the first magnet 44 with a predetermined gap width.

In this case, the magnetic gap portion 44c of the first magnet 44 is set to a predetermined gap width as the magnetic flux density over the movable angle range of ± alpha ₁ toward the outside from both sides of the center is increased gradually Therefore, when the first prism holding member 41 is rotated by the image shake correction operation corresponding to the lateral shake, the output of the first angle sensor (Hall element) 24 is within a movable angle range of ± α ₁ as shown in FIG. Therefore, even if the first prism holding member 41 is rotated over a large angle, the first rotation top held by the first prism holding member 41 is obtained. The rotation angle of the square prism 35 can be reliably detected.

On the other hand, the second prism holding member 51 disposed at a 180 ° symmetrical position with respect to the first prism holding member 41 is also fitted with the second shaft 52 in the oilless metal 51b ₁ fitted into the cylindrical bearing portion 51b. And the second rotor yoke 53 and the second magnet 54 fixed along the upper outer periphery of the cylindrical bearing portion 51 b of the second prism holding member 51 are attached to the upper outer peripheral portion in the frame 31. Since the second drive coil 56 has entered the cavity inside the second drive coil 56 fixed on the second insulating coil holder 55, the second drive coil 56 is at a reference position where the second rotation vertical prism 36 does not rotate. When the image blur correction operation is not performed without energizing the second rotor yoke 53, the second magnet 54, and the second back yoke 58 form a magnetic loop, the non-energized second drive coil Since the urging force acts so that the amount of magnetic flux between the N pole 54 a and the S pole 54 b of the second magnet 54 is substantially equal to the second magnet 54, the second prism holding member 51 has a magnetic gap portion of the second magnet 54. across the central portion of 54c in which keeping the midpoint alpha ₀ of the movable angle range of ± alpha _2, the initial state without being influenced by the photographing posture of the video camera 10A (FIG. 1), the second prism holding it is possible to hold the second rotation angle prism 36 is held by the member 51 at a predetermined middle position alpha ₀ of the movable angular range ± alpha _2.

  Thereafter, in order to perform an image shake correction operation corresponding to the vertical shake amount of the captured image with respect to the second rotation vertical angle prism 36, the second prism holding member 51 is moved in a direction in which the vertical shake amount of the captured image cancels out. When a current for rotating the held second rotation apex angle prism 36 is applied to the second drive coil 56, between the second drive coil 56 and the N pole 54 a (or S pole 54 b) of the second magnet 54. Due to the generated electromagnetic force, the second prism holding member 51 is attracted to the N pole 54 a (or S pole 54 b) side of the second magnet 54, so that the second prism holding member 51 swings around the second shaft 52. In order to rotate in a circular arc shape by a predetermined amount according to the amount, the second rotation vertex prism 36 can be rotated integrally with the second prism holding member 51.

  Further, the second angle sensor 25 soldered to the second flexible printed wiring board 57 disposed on the back surface side of the second insulating coil holder 55 using a Hall element is a reference that the second prism holding member 51 does not rotate. At the position, it faces a magnetic gap portion 54c formed at a central portion of the second magnet 54 with a predetermined gap width.

At this time, the magnetic gap portion 54c of the second magnet 54 is set to a predetermined gap width so that the magnetic flux density gradually increases over a movable angle range of ± α ₂ from both sides of the center to the outside. Therefore, when the second prism holding member 51 is rotated by the image shake correction operation corresponding to the vertical shake, the output of the second angle sensor (Hall element) 25 is within a movable angle range of ± α ₂ as shown in FIG. Therefore, even if the second prism holding member 51 is rotated over a large angle, the second rotation top held by the second prism holding member 51 is obtained. The rotation angle of the angular prism 36 can be reliably detected.

Incidentally, the predetermined movable angular range ± alpha ₁ of the first rotary apex angle prism 35, a predetermined movable angular range ± alpha ₂ of second rotation angle prism 36, in the first embodiment the same value (alpha ₁ = Α ₂ ), but they may be different values (α ₁ ≠ α ₂ ).

  According to the image shake correction apparatus 30 of the first embodiment configured as described above, a current in a direction that cancels the lateral shake amount is applied to the first drive coil 46 to generate an electromagnetic force with the first magnet 44. The first rotational apex prism 35 that is generated and held by the first prism holding member 41 runs sideways about the first axis 42 that is provided in the inner peripheral portion of the frame 31 so as to be substantially parallel to the optical axis K. An electromagnetic force is generated between the second magnet 54 by rotating in a circular arc shape in the direction of canceling the amount and applying a current in the direction of canceling out the vertical deflection amount to the second drive coil 56. The second rotation apex angle prism 36 held by the second prism holding member 51 is vertically arranged around the second shaft 52 which is laterally disposed 180 ° away from the first shaft 42 at the inner peripheral portion of the frame 31. Since it is rotated in the shape of an arc in the direction that cancels out the runout amount, lateral and vertical runout may occur. Since the subject image A (FIG. 3) moves in a direction that cancels out the horizontal shake direction and the vertical shake direction to cancel the horizontal shake and the vertical shake, a good subject image can be obtained and the structure is simple. The image blur correction device 30 according to the first exemplary embodiment that can be downsized can be provided.

FIG. 8 is a configuration diagram showing the overall configuration of a video camera to which the image shake correction apparatus according to the second embodiment of the present invention is applied.
FIG. 9 is a first exploded perspective view showing an exploded state of the image shake correcting apparatus according to the second embodiment of the present invention when viewed from the front side toward the rear side;
FIG. 10 is a second exploded perspective view showing an exploded state of the image shake correcting apparatus according to the second embodiment of the present invention when viewed from the rear side toward the front side;
FIG. 11 is an enlarged longitudinal sectional view showing an image shake correcting apparatus according to a second embodiment of the present invention.
FIG. 12 is a diagram schematically illustrating the rotation operation of the first and second rotation vertex angle prisms and the operation of detecting the rotation position in the image shake correction apparatus according to the second embodiment of the present invention. It is.

  In the following description, the same components as those in the image blur correction apparatus according to the first embodiment are denoted by the same reference numerals, and components different from those according to the first embodiment are denoted by new symbols.

  In the video camera 10 </ b> B shown in FIG. 8, as in the first embodiment, the image blur correction device 60 according to the second embodiment of the present invention is attached to the front portion of the lens barrel 11. In the image blur correction device 60 of the second embodiment, the frame body 61 is divided into two parts, a front frame body 62 and a rear frame body 63, and the two are attached to the front and back, and are integrally fastened in a cylindrical shape. In this cylindrical frame 62, a fixed apex angle prism 34 fixed on the subject side, and a surface perpendicular to the optical axis K by electromagnetic force according to the lateral shake amount (or vertical shake amount) of the video camera 10B are substantially provided. Along the first prism holding member 71 and a first turning apex angle prism 35 that rotates about a single axis 65 substantially parallel to the optical axis K, and a video camera 10B. The above-described one shaft 65 is integrated with the second prism holding member 81 over a predetermined angular range substantially along a plane orthogonal to the optical axis K by electromagnetic force in accordance with the vertical shake amount (or horizontal shake amount). The second pivotal apex prism 36 that pivots in the horizontal direction is arranged in the above order.

  At this time, the fixed apex angle prism 34 and the first and second rotating apex angle prisms 35 and 36 are each of the apex angles as in the first embodiment described above with reference to FIGS. Direction is set.

  In addition, as in the first embodiment, one of the first and second rotation apex angle prisms 35 and 36 is rotated according to the amount of lateral shake of the video camera 10B, and the other is the video camera 10B. What is necessary is just to rotate according to the amount of vertical deflection. In the second embodiment as well, a case where the first rotation apex angle prism 35 is rotated according to the lateral shake amount and the second rotation apex angle prism 36 is rotated according to the vertical shake amount will be described below. .

  In the lens barrel 11, as in the first embodiment, a front lens (group) 12, a variable power lens (group) 13, an iris 14, a focus lens (group) 15, and a subject image are stored. The solid-state imaging device 16 that performs photoelectric conversion is arranged in this order from the subject side. At this time, the shake correction device 60 of the second embodiment and the members 12 to 16 in the lens barrel 11 have the same optical axis.

  In addition, in the video camera 10B, as in the first embodiment, the control unit 21 that controls the whole and the horizontal shake when the video camera 10B shakes in the horizontal direction with respect to the Y axis orthogonal to the optical axis K are included. A horizontal shake amount detector 22 that detects the amount of vertical shake when the video camera 10B vertically shakes in the vertical direction with respect to the X axis orthogonal to the optical axis K and the Y axis. The first angle sensor 24 that detects the rotation angle of the first rotation apex angle prism 35 that rotates in accordance with the lateral shake amount in the image shake correction device 60, and the vertical shake amount in the image shake correction device 60. The second angle sensor 25 that detects the rotation angle of the second rotation apex angle prism 36 that rotates in response to the first and second rotation apex angle prisms 35, 36 provided in the image blur correction device 60. Rotating vertex angle prism driving circuit 2 for rotating the lens over a predetermined angle range. Door is provided.

  In the second embodiment, the first and second rotary apex prisms 35 and 36 are rotated based on the same principle of light beam deflection as that described in the first embodiment.

  At this time, in the image blur correction device 60 of the second embodiment, the first prism holding member 71 holding the first rotation vertex angle prism 35 and the second prism holding member 81 holding the second rotation vertex angle prism 36. In addition, at the upper outer peripheral portion in the frame body 61, the rotation is performed around a single shaft 65 that is horizontally disposed substantially parallel to the optical axis K between the front frame body 62 and the rear frame body 63. A specific configuration of the shake correction apparatus 60 according to the second embodiment of the present invention will be described below with reference to FIGS. 9 to 11.

  As shown in FIGS. 9 to 11, also in the shake correction device 60 according to the second embodiment of the present invention, the frame body 61 is formed by dividing the front frame body 62 and the rear frame body 63 into two parts using a black resin material. The frame 61 is integrally fastened by three screws 64 with the butted surfaces of the front frame 62 and the rear frame 63 butting each other.

The aforementioned front frame body 62 is integrally formed of a disk-shaped front surface 62a and a cylindrical surface 62b along the periphery of the front surface 62a, and the rear surface side of the cylindrical surface 62b is opened. and, the light passing hole 62a ₁ for passing light from an object in the center portion of the front 62a are formed through a rectangular shape, three screws for fastening the Kowakutai 63 64 Are inserted at three locations along the outer periphery of the front surface, and a fixed vertical prism 34 is fixed in the light passage hole 62a ₁ toward the subject side. The apex angle direction of the prism 34 is always directed to the lower right (for example, the direction of −45 °) as described with reference to FIG.

The rear frame 63 described above is integrally formed in a cylindrical shape with a disc-shaped rear surface 63a and a cylindrical surface 63b having the same diameter as the cylindrical surface 62b of the front frame 62 along the periphery of the rear surface 63a. is, the front surface side of the cylindrical surface 63b are opened, and, together with the light passing hole 63a ₁ for passing light from an object in the center portion of the rear surface 63a is formed through a circular shape, Holes 63a ₂ and 63a ₃ are formed through the upper surface of the rear surface 63a so as to lead out the extending portions 72a and 82a of the first and second flexible printed wiring boards 72 and 82, which will be described later, to the outside. Further, three screw holes 63c for screwing the three screws 64 are formed along the outer periphery.

  In addition, one shaft portion having one shaft 65 substantially parallel to the optical axis K is provided at an upper outer peripheral portion in the frame body 61 in which the front frame body 62 and the rear frame body 63 are fastened by three screws 64. Is placed sideways.

  Here, in the front frame body 62 on the front side of the frame body 61, the first prism holding member 71 to which the first rotation vertex angle prism 35 is integrally attached facing the fixed vertex angle prism 34 is described above. In this case, the apex angle direction of the first rotation apex angle prism 35 is as shown in FIG. 2 (c). As described above, it is along the Y axis at the initial stage.

  The first prism holding member 71 is integrally formed by connecting a trapezoidal frame portion 71a, a cylindrical bearing portion 71b, and a component mounting portion 71c using a black resin material, and this trapezoidal frame portion. A lens mounting portion of the lens thickness is formed inside 71a, and the outer peripheral portion of the first rotation apex angle prism 35 is held using an adhesive, and is connected to the upper center of the trapezoidal frame portion 71a. A cylindrical bearing portion 71b protruding upward is formed in a cylindrical shape so as to be orthogonal to the first rotation apex angle prism 35, and is pivotally attached to the one shaft 65 described above.

  Further, a Hall element is used on the front side of the component mounting portion 71c that is connected to the lower center of the trapezoidal frame portion 71a on the side opposite to the cylindrical bearing portion 71b of the first prism holding member 71 and protrudes downward. A first flexible printed wiring board 72 soldered to the first angle sensor 24, and a first printed wiring drive soldered on the first flexible printed wiring board 72 and wound with a first drive coil (not shown) A coil substrate 73 is laminated and attached.

  At this time, the first drive coil (not shown) wound around the first printed wiring drive coil substrate 73 is an N pole attached to the lower part inside the front frame body 62 via the L-shaped first yoke 74. And the first magnet 75 magnetized with the S pole with a space therebetween.

  Further, the first angle sensor 24 for detecting the rotational position soldered to the first flexible printed circuit board 72 is disposed in the central angular hole 71c1 formed in the central part of the component mounting part 71c of the first prism holding member 71. The first angle sensor 24 faces the first back yoke 77 fixed to the lower part of the rear frame 63 using a screw 76. At this time, the first back yoke 77 is fixed in the frame body 61 with the first flexible printed wiring board 72 and the first printed wiring drive coil board 73 interposed therebetween so as to face the first yoke 74 described above.

Further, the first flexible printed circuit board 72 has a partially extending extension portion 72a formed by being glued along the side surface of the trapezoidal frame portion 71a of the first prism holding member 71, so that the cylindrical bearing portion 71b is formed. after extending rearwardly parallel the optical axis K and substantially from the vicinity, because it is drawn to the outside through a hole 63a ₂ formed in an upper portion of the rear surface 63a of Kowakutai 63, first prism holding member When the 71 is rotated, the extension part 72a for pulling out is not easily deformed near the one shaft 65 that becomes the center of rotation, and a load is not applied to the extension part 72a for extraction. .

  Therefore, the first electromagnetic actuator for rotating the first rotation apex angle prism 35 held by the first prism holding member 71 includes the first yoke 74 and the first yoke fixed to the lower part in the front frame body 62. Fixed to a magnet 75, a first printed wiring drive coil substrate 73 having a first drive coil (not shown) fixed to the component mounting portion 71c of the first prism holding member 71, and a lower portion in the rear frame 63. The first back yoke 77 is made up of.

  On the other hand, in the rear frame 63 that is on the rear side of the frame 61, a second prism holding member 81 in which the second rotation apex prism 35 is integrally attached facing the first rotation apex prism 35. Is provided so as to be rotatable over a predetermined angular range around the one shaft 65 described above. At this time, the apex angle direction of the second apex angle prism 36 is the same as that shown in FIG. ) Along the X axis at the initial stage as described with reference to FIG.

  Similarly to the first prism holding member 71, the second prism holding member 81 is also integrally formed by connecting the trapezoidal frame portion 81a, the cylindrical bearing portion 81b, and the component mounting portion 81c using a black resin material. In this trapezoidal frame portion 81a, a lens mounting portion corresponding to the thickness of the lens is formed, and the outer peripheral portion of the second rotation vertical angle prism 36 is held using an adhesive. A cylindrical bearing portion 81 b that is connected to the upper center of the shape frame portion 81 a and protrudes upward is formed in a cylindrical shape so as to be orthogonal to the second rotation apex angle prism 36, and rotates around the one shaft 65 described above. It is pivotally mounted.

  Further, a Hall element is used on the rear surface side of the component mounting portion 81c that projects downward and is connected to the lower center of the trapezoidal frame portion 81a on the opposite side of the cylindrical bearing portion 81b of the second prism holding member 81. Second flexible printed wiring board 82 soldered to second angle sensor 25, and second printed wiring drive soldered on second flexible printed wiring board 82 and wound with a second drive coil (not shown) A coil substrate 83 is stacked and attached.

  At this time, the second drive coil (not shown) wound around the second printed wiring drive coil substrate 83 is connected to the N pole and S attached to the lower part inside the rear frame 63 via the L-shaped second yoke 84. It is opposed to the second magnet 85 magnetized with a pole at a distance.

  Further, the second angle sensor 25 for detecting the rotational position soldered to the second flexible printed circuit board 82 is provided in the central angular hole 81c1 formed in the central part of the component mounting part 81c of the second prism holding member 81. The second angle sensor 24 faces the second back yoke 86 bonded to the first back yoke 77 fixed to the rear frame 63 using screws 76. At this time, the second back yoke 86 is fixed in the frame body 61 with the second flexible printed wiring board 82 and the first printed wiring drive coil board 83 interposed therebetween so as to face the second yoke 84 described above.

Further, the second flexible printed circuit board 82 has a partially extending extension portion 82a formed by being glued along the side surface of the trapezoidal frame portion 81a of the second prism holding member 81 so that the cylindrical bearing portion 81b has a after extending rearwardly parallel the optical axis K and substantially from the vicinity, because it is drawn to the outside through a hole 63a ₃ formed in an upper portion of the rear surface 63a of Kowakutai 63, second prism holding member When the 81 is rotated, the extension part 82a for pulling out is not easily deformed in the vicinity of one shaft 65 serving as a rotation center, and a load is not applied to the extension part 82a for extraction.

  At this time, the first and second flexible printed wiring boards 72 and 82 and the first and second printed wiring drive coil boards 73 and 83 are respectively attached to the component mounting portions 71c and 81c of the first and second prism holding members 71 and 81. By mounting, it is possible to reduce the size and weight of the image blur correction device 30 according to the first embodiment described above.

  Therefore, the second electromagnetic actuator for rotating the second rotation apex angle prism 36 held by the second prism holding member 81 includes the second yoke 84 fixed to the lower portion in the rear frame 63 and the second electromagnetic actuator. A magnet 85, a second printed wiring drive coil substrate 83 having a second drive coil (not shown) fixed to the component mounting portion 81c of the second prism holding member 81, and a lower portion in the rear frame body 63 The second back yoke 86 is fixed through a back yoke 77.

  Further, in the image shake correction apparatus 60 of the second embodiment configured as described above, the first and second prism holding members 71 and 81 holding the first and second rotation apex prisms 35 and 36, respectively, are frame bodies. Since it is pivotally supported by a single shaft 65 provided laterally on the inner peripheral portion of 61, the number of parts can be reduced with respect to the image blur correction device 60 by sharing the single shaft 65. Can be planned.

  Next, in the image shake correcting apparatus 60 according to the second embodiment configured as described above, the rotation operation and the operation for detecting the rotation position of the first and second rotation apex angle prisms 35 and 36 will be described with reference to FIGS. This will be described with reference to FIG.

As shown in FIGS. 11 and 12A and 12B, the first drive coil wound around the first printed wiring drive coil substrate 73 at the reference position where the first rotation apex angle prism 35 does not rotate. When the image blur correction operation is not performed without energizing (not shown), the first yoke 74, the first magnet 75, and the first back yoke 77 form a magnetic loop, but are not energized. Since the urging force acts on the first drive coil (not shown) so that the amount of magnetic flux between the N pole 75a and the S pole 75b of the first magnet 75 is substantially equal, the first prism holding member 71 is The midpoint position α ₀ of the movable angle range of ± α ₁ is maintained across the central portion of the magnetic gap portion 75c of the first magnet 75, and is influenced by the shooting posture of the video camera 10B (FIG. 8) in the initial state. Without being held by the first prism holding member 71 It is possible to hold the first rotational apex angle prism 35 at a predetermined middle position alpha ₀ of the movable angular range ± alpha _1.

  Thereafter, in order to perform an image shake correction operation corresponding to the lateral shake amount of the captured image with respect to the first rotation vertical angle prism 35, the first prism holding member 71 is moved in the direction in which the lateral shake amount of the captured image cancels out. When a first drive coil (not shown) wound around the first printed wiring drive coil substrate 73 is applied to the current to rotate the held first turning vertical angle prism 35, the first drive coil (not shown) is applied. ) And the N pole 75a (or S pole 75b) of the first magnet 75, the first prism holding member 71 is drawn toward the N pole 75a (or S pole 75b) side of the first magnet 75. Therefore, the first prism holding member 71 is integrated with the first prism holding member 71 in order to rotate in a circular arc shape by a predetermined amount according to the lateral deflection amount about the one shaft 65. The square prism 35 can be rotated.

  Further, the first angle sensor 24 soldered onto the first flexible printed circuit board 72 using a Hall element has a predetermined position at a central portion of the first magnet 75 at a reference position where the first prism holding member 71 does not rotate. It faces the magnetic gap portion 75c formed with the gap width.

In this case, the magnetic gap portion 75c of the first magnet 75 is substantially similar to that described in Figure 7 above, and gradually increase the magnetic flux density over the movable angle range of ± alpha ₁ toward the outside from both sides of the central Therefore, when the first prism holding member 71 is rotated by the image shake correction operation corresponding to the lateral shake, the output of the first angle sensor (Hall element) 24 is ± α. _Since a linear section that changes linearly over _one movable angle range can be obtained greatly, even if the first prism holding member 71 rotates over a large angle, the first prism holding member 71 can hold it. Further, the rotation angle of the first rotation apex angle prism 35 can be reliably detected.

Similarly to the case of the first rotation apex angle prism 35, the second drive coil (wound around the second printed wiring drive coil substrate 83) at the reference position where the second rotation apex angle prism 36 does not rotate. The second yoke 84, the second magnet 85, and the second back yoke 86 form a magnetic loop when the image blur correction operation is not performed without energizing the current (not shown). Since the urging force acts so that the amount of magnetic flux between the N pole 85a and the S pole 85b of the second magnet 85 is substantially equal to the two drive coils (not shown), the second prism holding member 81 is Since the midpoint position α ₀ of the movable angle range of ± α ₁ is maintained across the central portion of the magnetic gap portion 85c of the two magnets 85, it is influenced by the shooting posture of the video camera 10B (FIG. 8) in the initial state. Without being held by the second prism holding member 81 A second rotation angle prism 36 can be held in a predetermined middle position alpha ₀ of the movable angular range ± alpha ₁ was.

In the second embodiment, as in the first embodiment, the predetermined movable angle range ± α _{1 of} the first rotation vertical angle prism 35 and the predetermined movable angle range ± α of the second rotation vertical angle prism 36 are the same. ₂ is set to the same value (α ₁ = α ₂ ), but they may be different values (α ₁ ≠ α ₂ ).

  Thereafter, in order to perform an image shake correction operation corresponding to the vertical shake amount of the captured image with respect to the second rotation apex angle prism 36, the second prism holding member 81 is moved in a direction in which the vertical shake amount of the captured image cancels out. When a current for rotating the held second rotation angle prism 36 is applied to a second drive coil (not shown) wound around the second printed wiring drive coil substrate 83, the second drive coil (not shown) is applied. 2) and the second prism holding member 81 on the N pole 85a (or S pole 85b) side of the second magnet 85 due to electromagnetic force generated between the N pole 85a (or S pole 85b) of the second magnet 85. Since the second prism holding member 81 rotates in a circular arc shape by a predetermined amount according to the amount of vertical deflection about the single shaft 65, the second rotation is integrally performed with the second prism holding member 81. The apex angle prism 36 can be rotated. .

  Furthermore, the second angle sensor 25 soldered onto the second flexible printed wiring board 82 using a Hall element has a predetermined position at the central portion of the second magnet 85 at the reference position where the second prism holding member 81 does not rotate. It faces the magnetic gap portion 85c formed with the gap width.

At this time, in the magnetic gap portion 85c of the second magnet 85, the magnetic flux density gradually increases over a movable angle range of ± α ₁ from both sides of the center to the outside, substantially as described above with reference to FIG. Therefore, when the second prism holding member 81 is rotated by the image shake correction operation corresponding to the vertical shake, the output of the second angle sensor (Hall element) 25 is ± α. _Since a linear section that changes linearly over _one movable angle range is greatly obtained, even if the second prism holding member 81 rotates over a large angle, the second prism holding member 81 holds it. Further, the rotation angle of the second rotation apex angle prism 36 can be reliably detected.

  According to the image shake correction apparatus 60 of the second embodiment configured as described above, the direction in which the lateral shake amount is canceled with respect to the first drive coil (not shown) wound around the first printed wiring drive coil substrate 72 is used. Is applied to the first magnet 75 to generate an electromagnetic force, and the first rotary apex prism 35 held by the first prism holding member 71 is placed on the inner peripheral portion of the frame 61 at the optical axis K. A second drive coil (rotated in a circular arc shape in a direction that cancels out the amount of lateral vibration around a single shaft 65 that is horizontally disposed substantially parallel to the second printed wiring drive coil substrate 82 ( A second rotation apex angle held by the second prism holding member 81 by applying an electric current in a direction that cancels out the vertical shake amount to the second magnet 85 to generate an electromagnetic force. The prism 36 is centered on the one axis 65 described above in the direction of canceling out the vertical shake amount. Since it is rotated in an arc shape, even if a horizontal shake and a vertical shake occur, the subject image A (FIG. 3) moves in a direction that cancels out the horizontal shake direction and the vertical shake direction to cancel the horizontal shake and the vertical shake. Therefore, it is possible to provide the image blur correction device 60 according to the second embodiment that can obtain a good subject image and that is simple in structure and can be downsized.

  Next, an image blur correction apparatus according to a modification obtained by partially modifying the second embodiment according to the present invention will be briefly described with reference to FIG.

  In the following description, the same components as those in the image blur correction apparatus according to the second embodiment are denoted by the same reference numerals, and only differences from the second embodiment will be described.

  FIG. 13 is an enlarged longitudinal sectional view showing a modified example of the image blur correction apparatus obtained by partially deforming the image blur correction apparatus according to the second embodiment of the present invention.

  As shown in FIG. 13, the image blur correction device 60 ′ according to the modified example obtained by partially deforming the image blur correction device 60 according to the second embodiment of the present invention is also a lens of the video camera 10B ′. It is attached to the front part of the lens barrel 11.

  The image blur correction device 60 ′ according to the modification of the second embodiment includes the first and second rotary apex angle prisms 35 and 36 held in the first and second prism holding members 71 and 81 in the frame body 61. The mounting structure of the first and second electromagnetic actuators serving as driving sources for rotating in a circular arc around a predetermined angle around a common shaft 65 is different from that of the second embodiment. The mounting structure of the first and second electromagnetic actuators used here is the one that incorporates the technical idea of the first embodiment described above.

  That is, in the mounting structure of the first electromagnetic actuator in the modified example of the second embodiment described above, the first prism holding member 71 is connected to the lower center of the trapezoidal frame portion 71a on the side opposite to the cylindrical bearing portion 71b. A first magnet 92 having N poles and S poles magnetized via an L-shaped first yoke 91 is attached to the front surface side of the component mounting portion 71c protruding to the first magnet 92. A first printed wiring drive coil substrate 93 having a first drive coil (not shown) and a first back yoke 94 which are opposed to each other with a gap therebetween are fixed to a lower portion in the front frame body 62. The first angle sensor 24 using a Hall element is soldered on the first printed wiring drive coil substrate 93 so as to face the first magnet 92.

  On the other hand, in the mounting structure of the second electromagnetic actuator in the modified example of the second embodiment described above, the second prism holding member 81 is connected to the lower center of the trapezoidal frame portion 81a on the side opposite to the cylindrical bearing portion 71b. A second magnet 96 having a north pole and a south pole magnetized via an L-shaped second yoke 95 is attached to the rear surface side of the component mounting portion 81c protruding to the second magnet 96. A second printed wiring drive coil substrate 97 having a second drive coil (not shown) and a second back yoke 98 which are opposed to each other with a gap therebetween are fixed to a lower portion in the rear frame 63. The second angle sensor 25 using a Hall element is soldered on the second printed wiring drive coil substrate 97 so as to face the second magnet 96.

  At this time, both the first printed wiring drive coil substrate 93 fixed in the front frame body 62 and the second printed wiring drive coil substrate 97 fixed in the rear frame body 63 are both exposed to the outside from the rear frame body 63 side. In the modification of the second embodiment, since the first and second printed wiring drive coil substrates 93 and 97 do not move, disconnection or the like does not occur.

  Accordingly, also in the modification of the second embodiment, the first and second rotating vertical angle prisms respectively held by the first and second prism holding members 71 and 81 by the first and second electromagnetic actuators having the above-described structure. 35 and 36 can be reliably rotated over a predetermined angle about a common shaft 65 in the frame 61, and the first and second angle sensors 24 and 25 are used to The rotation angle of the two rotation vertex angle prisms 35 and 36 can be reliably detected.

  In the first and second embodiments, the first and second electromagnetic actuators are applied as drive sources for rotating the first and second rotation vertex prisms held by the first and second prism holding members, respectively. However, the present invention is not limited to this, and a small piezoelectric element may be attached to each of the first and second prism holding members and rotated over a predetermined angle range.

1 is a configuration diagram illustrating an overall configuration of a video camera to which an image shake correction apparatus according to a first embodiment of the present invention is applied. (A), (b), and (c) are a fixed apex angle prism, a first rotation apex angle prism, and a second rotation apex angle prism provided in the image shake correction apparatus according to the first embodiment of the present invention. It is the front view, side view, and perspective view for demonstrating. (A), (b) is a light beam deflection by a fixed apex angle prism, a first rotation apex angle prism, and a second rotation apex angle prism provided in the image shake correction apparatus according to the first embodiment of the present invention. It is a figure for demonstrating the operation | movement principle. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing an image shake correction apparatus according to a first embodiment of the present invention in an exploded manner. 1 is an enlarged longitudinal sectional view of an image shake correction apparatus according to a first embodiment of the present invention. In the image shake correction apparatus according to the first embodiment of the present invention, it is a diagram schematically illustrating the rotation operation and the operation of detecting the rotation position of the first and second rotation vertex angle prisms. FIG. 6 is a diagram illustrating an output of a first angle sensor or a second angle sensor using a Hall element in the image shake correction apparatus according to the first embodiment of the present invention. It is the block diagram which showed the whole structure of the video camera to which the image blur correction apparatus of Example 2 which concerns on this invention is applied. FIG. 5 is a first exploded perspective view illustrating an exploded state of the image shake correcting apparatus according to the second embodiment of the present invention as viewed from the front side toward the rear side. FIG. 6 is a second exploded perspective view illustrating an exploded state of the image shake correcting apparatus according to the second embodiment of the present invention when viewed from the rear side toward the front side. It is the longitudinal cross-sectional view which expanded and showed the image blurring correction apparatus of Example 2 which concerns on this invention. FIG. 10 is a diagram schematically illustrating the rotation operation and the rotation position detection operation of the first and second rotation vertex angle prisms in the image shake correction apparatus according to the second embodiment of the present invention. FIG. 5 is an enlarged longitudinal sectional view of a modified example of an image blur correction device obtained by partially deforming the image blur correction device according to the second embodiment of the present invention.

Explanation of symbols

10A, 10B ... Video camera,
DESCRIPTION OF SYMBOLS 11 ... Lens barrel, 12 ... Front lens (group), 13 ... Variable magnification lens (group), 14 ... Iris,
15 ... Focus lens (group), 16 ... Solid-state image sensor,
21 ... Control unit, 22 ... Horizontal shake amount detector, 23 ... Vertical shake amount detector,
24 ... Hall element (first angle sensor), 25 ... Hall element (second angle sensor),
26: Rotating vertical angle prism drive circuit,
30: Image blur correction apparatus according to Embodiment 1,
31 ... Frame,
32 ... front frame body, 32a ... front surface, 32a ₁ ... light passage hole, 32b ... cylindrical surface,
32b ₁ , (32b ₂ ) ... a pair of upper and lower cutouts,
32b ₃ , (32b ₄ ) ... a pair of left and right claw engaging portions,
33 ... rear frame, 33a ... rear surface, 33a ₁ ... light passage hole, 33b ... cylindrical surface,
33b ₁ , 33b ₂ ... a pair of upper and lower cutouts,
33b ₃ , 32b ₄ ... a pair of left and right claws, 33c ... a small diameter cylindrical surface,
34. Fixed vertex angle prism,
35 ... 1st rotation apex angle prism, 36 ... 2nd rotation apex angle prism,
41 ... first prism holding member,
41a ... concave frame portion, 41b ... cylindrical bearing portion, 41b ₁ ... oilless metal,
42 ... first shaft, 43 ... first rotor yoke,
44 ... 1st magnet, 44a ... N pole, 44b ... S pole, 44c ... Magnetic gap part,
45 ... 1st insulating coil holder, 45a ... Center part square hole, 45b ... Outer square hole,
46 ... 1st drive coil, 47 ... 1st flexible printed wiring board,
48. First back yoke,
51. Second prism holding member,
51a ... concave frame portion, 51b ... cylindrical bearing portion, 51b ₁ ... oilless metal,
52 ... second shaft, 53 ... second rotor yoke,
54 ... 2nd magnet, 54a ... N pole, 54b ... S pole, 54c ... Magnetic gap part,
55 ... 2nd insulating coil holder, 55a ... Center part square hole, 55b ... Outer square hole,
56 ... 2nd drive coil, 57 ... 2nd flexible printed wiring board,
58. Second back yoke.

60. Image blur correction apparatus according to Embodiment 2,
60 ′: Image blur correction apparatus according to a modification obtained by partially deforming the second embodiment,
61 ... Frame,
62 ... front frame body, 62a ... front surface, 62a ₁ ... light passage hole, 62b ... cylindrical surface, 62c ... round hole,
63 ... rear frame, 63a ... rear face, 63a ₁ ... light passage hole, 63a ₂ , 63a ₃ ... hole,
63b ... cylindrical surface, 63c ... screw hole,
64 ... screw, 65 ... one axis,
71 ... first prism holding member,
71a ... trapezoidal frame portion, 71b ... cylindrical bearing portion, 71c ... component mounting portion,
72 ... 1st flexible printed wiring board, 72a ... Extension part for drawer,
73 ... 1st printed wiring drive coil board | substrate, 74 ... 1st yoke,
75 ... 1st magnet, 75a ... N pole, 75b ... S pole, 75c ... Magnetic gap part,
76 ... screw, 77 ... first back yoke,
81. Second prism holding member,
81a ... trapezoidal frame portion, 81b ... cylindrical bearing portion, 81c ... component mounting portion,
82 ... second flexible printed wiring board, 82a ... extension part for drawer,
83 ... second printed wiring drive coil substrate, 84 ... second yoke,
85 ... second magnet, 86 ... second back yoke,
91 ... 1st yoke, 92 ... 1st magnet, 93 ... 1st printed wiring drive coil board | substrate,
94 ... 1st back yoke, 95 ... 2nd yoke, 96 ... 2nd magnet,
97: second printed wiring drive coil substrate, 98: second back yoke.

Claims (9)

An image shake correction apparatus that is disposed on the optical axis of an imaging lens and corrects image shake by canceling out the shake amount of a captured image,
A plurality of vertical prisms that are substantially fan-shaped, and whose apex direction side thickness is smaller than the thickness on the opposite side of the apex direction;
At least one or more shaft portions horizontally provided having an axis substantially parallel to the optical axis;
Of the plurality of apex angle prisms, a frame portion that holds at least one rotation apex angle prism excluding at least one fixed apex angle prism fixed without rotating about the axis, and connected to the frame portion and and has said pivot apex angle perpendicular to the prism bearing unit, the provided for each rotational angle prism, the said said shaft is fitted in a bearing portion integrally with the rotation angle prism At least one prism holding member capable of rotating in an arc shape around a predetermined movable angle range about an axis;
A rotor yoke fixed to the opposite side of the frame portion in the bearing portion of the prism holding member, and a magnet magnetized to the N and S poles;
A drive coil and a back yoke, which are attached to the outer peripheral portion of the frame body and wound around the magnet,
By the electromagnetic force generated between the applied to the magnet a current for rotating the prism holding member in a direction in which the shake amount is canceled out to the driving coil, the rotating top integrally with the prism holding member An image shake correction apparatus characterized by rotating an angular prism. At a reference position where the prism holding member holding the rotating apex prism does not rotate, the amount of magnetic flux between the N pole and S pole of the magnet is substantially equal to the non-energized drive coil. 2. The image blur correction device according to claim 1, wherein the rotation vertex angle prism held by the prism holding member maintains a midpoint position of the predetermined movable angle range by applying an urging force. The plurality of apex angle prisms includes the fixed apex angle prism, and a first rotation apex angle prism and a second rotation apex angle prism held by the prism holding member,
The prism holding member is a first prism holding member that is supported by a first axis that is disposed substantially parallel to the optical axis, and that holds the first rotation vertical angle prism. 2. A second prism holding member that holds the second rotation vertical angle prism supported by a second axis that is horizontally disposed at 180 degrees around the optical axis. Alternatively, the image blur correction apparatus according to claim 2. An image shake correction apparatus that is disposed on the optical axis of an imaging lens and corrects image shake by canceling out the shake amount of a captured image,
A plurality of vertical prisms that are substantially fan-shaped, and whose apex direction side thickness is smaller than the thickness on the opposite side of the apex direction;
At least one or more shaft portions horizontally provided having an axis substantially parallel to the optical axis;
Of the plurality of apex angle prisms, a frame portion that holds at least one rotation apex angle prism excluding at least one fixed apex angle prism fixed without rotating about the axis, and connected to the frame portion and and has said pivot apex angle perpendicular to the prism bearing unit, the provided for each rotational angle prism, the said said shaft is fitted in a bearing portion integrally with the rotation angle prism At least one prism holding member capable of rotating in an arc shape around a predetermined movable angle range about an axis;
A rotor yoke fixed to the opposite side of the frame portion in the bearing portion of the prism holding member, and a magnet magnetized to the N and S poles;
A drive coil and a back yoke that are attached to the outer periphery of the frame and wound around the magnet;
A hall element attached to an outer peripheral portion of the image blur correction device so as to face the magnetic gap portion of the magnet at a reference position where the prism holding member does not rotate;
When the Hall element detects the rotation angle of the rotation vertex prism that is rotated integrally with the prism holding member, the magnetic gap portion of the magnet gradually increases in magnetic flux density from the center toward the outside. An image blur correction apparatus characterized in that a predetermined gap width is set so as to increase. An image shake correction apparatus that is disposed on the optical axis of an imaging lens and corrects image shake by canceling out the shake amount of a captured image,
A plurality of vertical prisms that are substantially fan-shaped, and whose apex direction side thickness is smaller than the thickness on the opposite side of the apex direction;
At least one or more shaft portions provided sideways with one axis substantially parallel to the optical axis;
A first frame portion that holds a first rotating apex angle prism of the plurality of apex angle prisms; and a first bearing portion that is connected to the first frame portion and orthogonal to the first rotating apex angle prism. The first shaft is fitted to the first bearing portion, and can be rotated in an arc shape over a predetermined movable angle range around the shaft integrally with the first rotation apex prism. A first prism holding member;
A second frame portion that is disposed laterally with respect to the first prism holding member, holds a second pivotal vertex prism among the plurality of apex angle prisms, and is connected to the second frame portion; and A second bearing portion orthogonal to the second rotation angle prism, and the one shaft is fitted to the second bearing portion so that the one axis is integrated with the second rotation angle prism. A second prism holding member capable of rotating in a circular arc shape over a predetermined movable angle range around the center;
First and second electromagnetic actuators for rotating the first and second prism holding members respectively holding the first and second apex angle prisms in a direction in which the shake amount is canceled;
An image blur correction apparatus comprising: The first electromagnetic actuator includes a first drive coil substrate having a first drive coil in a component mounting portion formed on the side opposite to the first bearing portion of the first prism holding member and connected to the first frame portion. And a first magnet and a first yoke are fixed to one surface of the first frame so as to face the first drive coil substrate, and a first back yoke is fixed to the first yoke. And fixed to the first frame with the first drive coil substrate interposed therebetween,
The second electromagnetic actuator includes a second drive coil substrate having a second drive coil in a component mounting portion formed on the side opposite to the second bearing portion of the second prism holding member and connected to the second frame portion. And a second magnet and a second yoke are fixed to the other surface of the second frame so as to face the second drive coil substrate, and a second back yoke is fixed to the second yoke. The image blur correction apparatus according to claim 5, wherein the image blur correction apparatus is fixed to the second frame with the second drive coil substrate interposed therebetween. In the first electromagnetic actuator, a first yoke and a first magnet are attached to a component attaching portion formed on the side opposite to the first bearing portion of the first prism holding member and connected to the first frame portion. And a first drive coil substrate having a first drive coil facing the first magnet and a first back yoke are fixed to one side of the first frame body,
In the second electromagnetic actuator, a second yoke and a second magnet are attached to a component attaching portion formed on the side opposite to the second bearing portion of the second prism holding member and connected to the second frame portion. A second drive coil substrate having a second drive coil facing the second magnet and a second back yoke are fixed to the other side of the second frame. Item 6. The image blur correction device according to Item 5. At the reference position where the first and second prism holding members respectively holding the first and second rotation apex prisms do not rotate, the first and second drive coils are deenergized with respect to the first and second drive coils. that the amount of the magnetic flux between the N and S poles of the second magnet exerts a biasing force so as to be substantially equal, the first, the were respectively held in the second prism holding member first, second rotating top 8. The image blur correction apparatus according to claim 6, wherein each of the angular prisms maintains a midpoint position of the predetermined movable angle range. A first Hall element for detecting a rotation angle of the first rotation apex angle prism is disposed on the first drive coil substrate so as to face the first magnet, and the second drive coil substrate includes the first hall element. 9. The image blur according to claim 6, wherein a second Hall element for detecting a rotation angle of the two- rotation vertical angle prism is disposed to face the second magnet. Correction device.

Images