JP2009192714A - Imaging device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently assemble a lens barrel that constitutes an optical system for imaging of an imaging device through easy operation. <P>SOLUTION: A flexible substrate 165, on which light quantity restricting drive sources 163 and 164 are installed is mounted in plane on a holding member 169 made of a rigid material, and the light quantity restricting drive sources 163 and 164 are temporarily anchored and held substantially in an in-use attitude, with temporary anchor means 177 and 178 being provided to the holding member 169 to be unitized. The unitized body is assembled on a base of the lens barrel. Since the light quantity restricting drive sources 163 and 164 are held in one body by the rigid holding member 169 substantially in the in-use attitude to be prevented from being inclined by the flexibility of the flexible substrate 165, the light quantity restricting drive sources 163 and 164 can be assembled efficiently, directly opposite the base at assembling operation. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an imaging apparatus having a shutter mechanism, a diaphragm mechanism, and a shake correction mechanism.

  In general, when an imaging apparatus such as a camera or binoculars is used by hand, an imaging apparatus having a shake correction function for preventing image shake due to camera shake is used.

  Such a shake correction function of the image pickup apparatus performs shake correction that prevents image shake due to camera shake by a shake correction apparatus that optically cancels the shake according to the result of detecting the shake state of the image pickup apparatus by the vibration detection means. Do.

  Such shake correction apparatuses include a type that swings the correction optical system. In the shake correction apparatus that swings the correction optical system, the correction lens that forms part of the photographing lens system is moved in a direction that absorbs the shake in a plane orthogonal to the optical axis of the main optical system. Correct image position deviation and eliminate image blur.

  In the shake correction device that swings the correction optical system, if the correction lens is heavy, the driving force for moving the correction lens becomes large, and the vibration-proof driving unit becomes large. It is desirable to arrange.

  In addition, an imaging apparatus that captures a still image includes a shutter mechanism that drives a shutter blade by rotating an arm using a rotating mechanism including a magnet and a yoke, for example. In such a shutter mechanism, since the outer shape of the lens barrel becomes large unless the shutter blades are arranged at a position where the photographing light beam is narrowed, it is desirable to arrange the shutter blades at a position where the light flux is narrowed.

  Further, in the image pickup optical system of the image pickup apparatus, it is desirable to dispose an optical stop for adjusting the light amount, an ND filter (a neutral density filter) and the like at a position where the light beam is stopped.

  For this reason, a conventional imaging apparatus has been proposed in which a camera shake correction mechanism, a shutter mechanism, and an ND filter mechanism are integrally configured so as to reduce the size and increase the functionality of the photographing lens.

  In this conventional imaging apparatus, in order to reduce the size of the taking lens, the actuators of the camera shake correction mechanism, the shutter mechanism, and the ND filter mechanism are arranged on the same surface of the base member as a unit.

  This unit is assembled by the following procedure. In this assembly procedure, first, a coil bobbin forming an actuator of a camera shake correction mechanism is bonded and fixed to a base member. A metal stud connected to the coil is implanted in the coil bobbin of the camera shake correction mechanism. The coil bobbin is installed on the base member with the metal stud extending in the optical axis direction. Next, the correction optical lens holder is movably mounted on the base member using a tension spring.

  In the next assembly process, a sensor holder into which a shake correction flexible printed circuit board (FPC) provided with a sensor for detecting the displacement of the correction optical lens holder is press-fitted is attached to the base member. In this step, the metal stud that is implanted in the coil bobbin of the camera shake correction mechanism and extends in the optical axis direction is connected to the camera shake correction FPC that is disposed in the plane direction orthogonal to the optical axis by soldering. .

  In the next assembly step, an actuator that drives the shutter mechanism and an actuator that drives the ND filter mechanism are placed on the base member.

  In these actuators, each metal stud connected to each coil is implanted so as to extend in a direction perpendicular to the optical axis when these actuators are assembled to the imaging device.

  Each actuator is integrated by connecting and fixing each metal stud to one shake correction FPC. Therefore, the configuration is such that two FPCs are combined into one FPC exclusively for each actuator.

In this unit, before each actuator is incorporated into the base member, the metal stud of each actuator and the FPC are connected by soldering. Therefore, in this unit, it is not necessary to secure a working space required when soldering after incorporating each actuator, and it is possible to reduce the size of the base member and hence the photographic lens (for example, Patent Documents). 1).
JP2007-219338

  However, in the configuration in which the above-described camera shake correction mechanism, shutter mechanism, and ND filter mechanism unit are formed, there is a problem in workability of the assembly process of this unit. In this unit, the extension direction of the metal stud of the actuator of the shutter mechanism and the ND filter mechanism and the extension direction of the metal stud of the camera shake correction mechanism are orthogonal to each other after assembly.

  For this reason, in the assembly work of this unit, the FPC is bent at a right angle near each actuator and assembled to the base member. The FPC bent in this way has a property of returning to the original stretched state due to its elasticity. For this reason, the actuators 209 and 210 are displaced from the assembling position by the elastic restoring force of the bent FPC, and there is a problem that the assembling work to the base member base 201 becomes difficult.

  In particular, the actuator is structured to be positioned on the base member using a dowel provided on the bottom surface thereof. For this reason, when the position of the actuator greatly deviates from the base member, the actuator dowels cannot be inserted into the corresponding holes of the base member, and the actuator cannot be positioned on the base member.

  Further, in the assembly work of this unit, the sensor holder must be assembled to the base member, and then the shutter mechanism actuator and the ND filter mechanism actuator must be assembled sequentially. For this reason, the assembly work of this unit has a lot of work processes, and the assembly efficiency was bad.

  An object of the present invention is to provide an imaging apparatus configured so that an imaging optical system can be efficiently assembled by an easy operation.

  In order to achieve the above object, an image pickup apparatus according to claim 1 is an image pickup apparatus including a lens barrel constituting an image pickup optical system, wherein the first light amount regulating means attached to the lens barrel is provided. A first light quantity regulating drive source for driving, a second light quantity regulating drive source for driving the second light quantity regulating means mounted on the lens barrel, and a curved plate as a whole, one free A flexible substrate in which the first light quantity regulation drive source is connected to the end and the second light quantity regulation drive source is connected to the other free end, and is formed in a curved shape so as to overlap the flexible board. The flexible circuit board can be attached to form a unit by allowing the first light quantity regulating drive source to face one free end and the second light quantity regulating drive source to face the other free end. Retainer made of rigid material And the flexible substrate in a state of being elastically bent at each free end of the holding member so as to maintain the first light amount restriction drive source and the second light amount restriction drive source in a posture close to a use state. In order to support the position, a position between one free end of the holding member and the first light quantity regulation drive source, and the other free end of the holding member and the second light quantity regulation drive source The lens barrel in which the temporary fixing means respectively disposed at the interposition and the unit in which the flexible substrate and the first and second light quantity regulating drive sources are attached to the holding member are incorporated. And a base.

  In order to achieve the above object, an imaging apparatus according to claim 2 is an imaging apparatus including a lens barrel that constitutes an imaging optical system, and includes a correction optical mechanism mounted on the lens barrel. Displacement optical member driving means for driving the displacement optical member constituting a part of the system to be displaced with respect to the optical axis, and first light quantity regulation for driving the first light quantity regulation means mounted on the lens barrel Displacement optics, a drive source, a second light amount restriction drive source for driving the second light amount restriction means mounted on the lens barrel, and a displacement optical device planted so as to extend in a rod shape from the displacement optical member drive means A stud for the member driving means, a first stud for restricting the light quantity driving source planted so as to extend from the first light quantity regulation drive source, and a rod shape extending from the second quantity of light regulation drive source. 2nd light quantity regulation planted to take out In a state in which the extension direction of the stud for the moving source, the stud for the displacement optical member driving means, the first stud for the light quantity restriction driving source, and the second stud for the light quantity restriction driving source are the same direction. A circuit board that is electrically connected to each corresponding connection location, and the circuit board on which at least the first light quantity regulation drive source and the second light quantity regulation drive source are mounted are mounted in a plane. A holding member made of a rigid material that is temporarily held by a temporary fixing means so as to be unitized, and the holding board and the circuit board and the first and second light quantity regulating drive sources are attached to the unit. And a base of the lens barrel into which the converted one is incorporated.

  According to the imaging apparatus of the present invention, the light quantity regulating drive source connected to the flexible board is integrally attached to the holding member made of the rigid material by the temporary fastening means, and the whole is made into a unit part. Since these unit parts can be assembled together at the same time on the base of the lens barrel, there is an effect of reducing the number of assembling steps and improving the assembling efficiency. Further, since the light quantity regulating drive source is integrally held by the holding member, the light quantity regulating drive source can be prevented from being inclined due to the flexibility of the flexible substrate. Therefore, there is no need to hold the light quantity regulating drive source in the used posture at the time of assembly, and the workability can be improved.

[First embodiment]
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an exploded perspective view showing a lens barrel portion where a camera shake correction mechanism, a shutter mechanism, and an ND filter mechanism are installed in an imaging apparatus such as a digital camera according to the first embodiment.

  A lens barrel as an optical imaging apparatus shown in FIG. 1 includes an optical lens 1 constituting a first lens group, an optical lens 2 constituting a second lens group, and an optical lens 3 constituting a third lens group. Prepare.

  In this lens barrel imaging optical system, the first and second optical lenses 1 and 2 are responsible for magnification change and image plane correction, and the third optical lens 3 is a focus lens for adjusting the focus.

  The first lens barrel 10 in this lens barrel includes a decorative plate 11 that covers the entire surface of the first lens holder 14 that holds the first lens 1, and a lens barrier that opens and closes between a position that covers the photographing optical path and a retracted position. 12. The lens barrier 12 is configured to be driven by a drive ring 13. The drive ring 13 is configured to be rotated around the optical axis by bringing an arm 13a integrally extending in the optical axis direction from the drive ring 13 into sliding contact with a drive slope of a CCD holder described later. ing.

  The first group lens barrel 10 includes a barrier spring 15 stretched so as to urge the holder 14 of the first group optical lens 1 and the lens barrier 12 and the drive ring 13 toward each other. Further, the first group barrel 10 is provided with a follower pin 16 that is press-fitted and fixed to the holder 14 of the first group optical lens 1 and engages with a cam groove 4a of a movable cam ring 4 described later.

  As will be described later, the second group lens barrel 20 that holds the second lens group in the lens barrel includes a shutter unit (shutter mechanism), a diaphragm unit (light quantity diaphragm mechanism as an ND filter mechanism), and a shake correction mechanism (shake correction mechanism). ). The second group lens barrel 20 is integrally provided with two fixed follower pins 20a. Further, the second group lens barrel 20 is provided with a movable follower pin 20b which is movable with respect to the second group lens barrel 20 and pressed by a spring (not shown) in a direction away from the optical axis. The detailed configuration of the second group unit will be described later.

  The lens barrel includes a third group barrel 31 that holds the third lens group 3 and a CCD holder 7 that holds the third group barrel 31. One end of the guide bar 32 is fixed and installed on the CCD holder 7. The guide bar 32 holds the third group barrel 31 slidably. The CCD holder 7 is integrally formed with a barrier drive slope 7a.

  This lens barrel includes a feed screw 33 for moving the third group barrel 31 in the optical axis direction. A gear (not shown) is fixed to the rear end portion of the feed screw 33. A feed nut 34 is screwed onto the feed screw 33. In addition, a tension spring 35 is placed on the third group barrel 31 so as to be offset.

  The lens barrel includes a focus motor 36 serving as a driving source for driving the third group barrel 31, a transmission gear 37 that transmits the rotation of the focus motor 36 to the feed screw 33, and a gear cover that holds the transmission gear 37. 38.

  This lens barrel includes a CCD 41 as an image sensor that converts an image formed by an imaging optical system into an electrical signal. The CCD 41 is configured to be held by a CCD plate 42. The CCD plate 42 is configured to be pressed in a direction away from the CCD holder 7 by a CCD spring 43. The CCD plate 42 is configured such that the position in the optical axis direction can be adjusted by a CCD adjustment screw 44.

  The lens barrel includes a low-pass filter 45 and a dust-proof rubber 46 that blocks between the low-pass filter 45 and the CCD plate 42 and prevents dust from entering the periphery of the CCD.

  This lens barrel includes a zoom motor 51 which is a drive source of a zoom drive system that moves the first group barrel 10 and the second group barrel 20 in the optical axis direction. A worm gear 52 is directly connected to the rotation shaft of the zoom motor 51. Further, the worm gear 52 is connected with a zoom gear train 53 that sequentially transmits the rotation.

  The lens barrel includes a movable cam ring 4 that holds the first group barrel 10 and the second group barrel 20. A cam groove 4 a that holds the first group barrel 10 and a cam groove 4 b that holds the second group barrel 20 are formed on the inner peripheral surface of the movable cam ring 4. A gear 4 c that meshes with the zoom gear train 53 is installed on the outer periphery of the rear end portion of the moving cam ring 4. Further, a follower pin 4d that engages with a cam groove 6a of the fixed cylinder 6 described later is integrally provided on the outer periphery of the rear end portion of the movable cam ring 4.

  The lens barrel includes a straight guide ring 5 that restricts rotation of the first group barrel 10 and the second group barrel 20. On the side surface of the rectilinear guide ring 5, a guide groove 5 a that guides the first group barrel 10 straight and a guide groove 5 b that guides the second group barrel 20 rectilinearly are provided. Further, the straight guide ring 5 has a structure for preventing the moving cam ring 4 from coming off by providing a protrusion 5c on the outer periphery of the front end and a flange 5d on the rear end.

  A protrusion 5e is provided on the flange portion of the linear guide ring 5 so that the linear guide ring 5 can be moved only in the optical axis direction by being fitted with a linear groove (not shown) on the inner surface of the fixed cylinder 6 described later. It is configured.

  This lens barrel includes the fixed barrel 6 for holding the movable cam ring 4 movably as described above. A cam groove 6 a for guiding the moving operation of the movable cam ring 4 is provided on the inner peripheral surface of the fixed cylinder 6.

  This lens barrel is provided with a flexible printed circuit board (hereinafter referred to as a lens barrel FPC) that supplies power to the zoom motor 51 and the focus motor 36 of the lens barrel. Reference numeral 62 shown in FIG. 15 denotes a photo interrupter mounted on the rear surface side of the lens barrel FPC. The photo interrupter 62 is configured to detect the rotation of the propeller integrally formed with the worm gear 52 in cooperation with another photo interrupter (not shown).

  Next, an operation in the lens barrel portion of the imaging apparatus configured as described above will be described. First, zoom driving will be described.

  In the lens barrel portion of this imaging apparatus, when the zoom motor 51 is rotated, the driving force is transmitted to the gear 4 c of the movable cam ring 4 via the worm gear 52 and the zoom gear train 53.

  In the lens barrel portion of this imaging apparatus, when the movable cam ring 4 rotates, the follower 4d is guided by the cam groove 6a, so that the first group barrel 10 and the second group barrel 201 move in the optical axis direction. This is a state in which the first group barrel 10 and the second group barrel 20 are suspended in the cam grooves 4a and 4b, respectively, inside the movable cam ring 4.

  Further, since the rotation of the first group barrel 10 and the second group barrel 20 is regulated by the guide grooves 5a and 5b of the linear guide ring 5 whose rotation is regulated by the fixed barrel 6, the first group barrel 10 and the second group are regulated. The lens barrel 20 moves in the optical axis direction. Therefore, in the lens barrel portion of this imaging apparatus, the zoom magnification is determined by the positions of the first group lens and the second group lens by stopping the zoom motor 51 at a desired position.

  Further, in the lens barrel portion of this image pickup apparatus, the zoom position is detected by the photo interrupter 62 and another photo interrupter (not shown). The zoom position is detected by using a photo interrupter (not shown) to detect the reset position of the linear guide ring in the optical axis direction as a reference position. Then, the rotation direction and the rotation pulse are detected by the photo interrupter 62 and another photo interrupter (not shown), and the relative position from the reference position is calculated.

  Next, driving of the focus lens in the lens barrel portion of the imaging apparatus will be described.

  When driving the focus lens, the focus motor 36 is rotated. Then, the rotational driving force of the focus motor 36 is transmitted to the gear of the feed screw 33 via a pinion gear and a transmission gear 37 (not shown), and the feed screw rotates.

  Here, the third group barrel 31 is biased to a nut 34 that is screwed with the feed screw 33 by a tension spring 35, and the rotation direction of the nut 34 is regulated by the third group barrel 31. It has become.

  For this reason, even if the feed screw 33 rotates, the nut 34 cannot be rotated and can move only in the feed screw axis direction. Will move.

  Further, in this imaging apparatus, the absolute position of the third group barrel 31 is calculated by using the photo interrupter 63 and the focus motor 36 constituted by a pulse motor. For this reason, in the imaging apparatus, the reset position of the third group barrel 31 is detected by the photo interrupter 63 mounted on the back side of the drawing of the barrel FPC 64. In this imaging apparatus, the absolute position is calculated by counting the drive pulses of the focus motor 36 using the detected reset position as a reference position and calculating the relative position.

  Next, the configuration of the second group barrel 20 in the lens barrel portion of the imaging apparatus will be described with reference to FIGS. 2, 4, and 5. FIG. 2 is an exploded perspective view showing the object side (subject side) portion of the second group lens barrel 20 according to the first embodiment of the present invention.

  As described above, the second group barrel 20 has shake correction, shutter, and aperture mechanisms. The second group lens barrel 20 is configured by assembling each component to a second group base 151 which is a base of the second group lens barrel.

  A focus feed screw 33 and a relief shape 152 of the focus guide bar 32 are formed on the object side (subject side) of the second group base 151.

  The lens barrel portion of the imaging apparatus is reduced in size by shortening the interval between the lens group barrels when not in use (hereinafter, this state is referred to as a retracted state). In this retracted state, the focus feed screw and the focus guide bar protrude in the optical axis direction, and therefore pass through the second group base 151 when retracted. At this time, in order to prevent light rays not passing through the lens from passing through the penetrating portion and entering the CCD to cause light leakage, a bag shape is formed like the relief shape 151 of the second group base 151 to prevent light leakage. It is configured to suppress.

  The second group lens group is attached by caulking to the second group lens holder 153 that holds the second group lens group 2 that is a displacement optical member that constitutes a part of the photographing optical system and is attached to the second group base 151. . Magnets 154 and 155 are integrally held by the second group lens holder 153.

FIG. 3 is a front view showing a state where the sensor holder, the second group FPC, and the second group cover are removed from the subject side in the second group lens barrel 20 according to the first embodiment of the present invention. As shown in FIGS. 2 and 3, the second group lens holder 153 has three hooks 156 on which tension springs 157 are hung. The second group lens holder 153 has three hooks 156 and a tension spring 157 is hung. Coil units 158 and 159 including a coil and a bobbin serving as a displacement optical member driving unit for driving the second group lens holder 153 to be displaced with respect to the optical axis are bonded and fixed to the recess of the second group base 151.
Power supply to the coil is performed via a two-group FPC, which will be described later, connected to pin-shaped metal studs (studs for displacement optical member driving means) 160 and 161 that are implanted in the bobbin and electrically connected to the coil. It is.

  The second group lens holder 153 is attached to the second group base 151 so as to be freely movable in a plane perpendicular to the optical axis. For this reason, between the second group base 151 and the second group lens holder 153, three balls 162 made of a non-magnetic material are sandwiched, and the second group lens holder 153 is movably supported. At the same time, a spring 157 as a tension coil spring is stretched between the hook 156 of the second group lens holder 153 and the hook (not shown) of the second group base 151.

  As a result, an urging force that is pressed against the second group base 151 via the ball 162 acts on the second group lens holder 153. As a result, the second group lens holder 153 is held in a state of being movably supported by the three balls 162 with respect to the second group base 151.

  In the lens barrel portion of the image pickup apparatus configured as described above, the image on the CCD is controlled and shaken by moving and adjusting the second group lens holder 153 that is movably supported in a plane perpendicular to the optical axis. Make corrections.

  Next, on the second group base 151 to which the second group lens holder 153 is mounted, the two actuators 163 and 164 that are light quantity control drive sources and the sensor holder 169 to which the second group FPC 165 that is a flexible substrate is fixed are attached. .

  One actuator 163 as the light quantity regulating drive source is a shutter actuator that drives the shutter blades. The other actuator 164 serving as the light quantity regulating drive source is an ND filter actuator that drives the ND filter. These are so-called two-point switching type actuators configured such that the arm stop position is switched by forward and reverse rotation of the energization direction.

  The second group FPC 165 is a flexible printed circuit board that supplies electric power configured as a sheet-like member that is a flat plate that can be elastically deformed, and is formed in a curved shape (substantially semicircular arc shape).

  An actuator 163 and an actuator 164 are integrally attached to both free ends of the second group FPC 165 by soldering.

  Further, a land 166 is disposed at a predetermined position corresponding to an intermediate portion between the actuators 163 and 164 in the second group FPC 165. In this land 166, metal studs (coil studs) (studs for displacement optical member driving means) 160, 161 extending in a rod shape from the respective coil units 158, 159 intersect with the plane of the second group FPC 165 (here, Solder brazing in an orthogonal state). Thereby, each coil unit 158, 159 is electrically connected to the electric circuit for electric power feeding drive of 2 group FPC165.

  Further, Hall elements 167 and 168 for detecting a magnetic field are mounted on the back side of the second group FPC 165 at positions corresponding to the magnets 154 and 155 of the second group lens holder 153, respectively.

  In the second group FPC 165, the flexible printed circuit boards are integrated into one sheet by making the pattern width of the flexible printed circuit boards finer and adopting a film material having weak bending elasticity. That is, the second group FPC 165 is configured by forming a flexible printed circuit board of a conventional shake correction mechanism and a flexible printed circuit board of a shutter and an ND actuator, which are separated.

  The sensor holder 169 is made of a rigid material, and is formed as a member having a plate shape (substantially semicircular arc plate shape) that is curved in substantially the same shape so as to overlap the second group FPC 165 as a whole.

  In the lens barrel portion of the image pickup apparatus, the moving state of the second group lens holder 153 is detected using Hall elements (detection parts for shake correction mechanism) 167 and 168 and magnets 154 and 155. Therefore, the magnets 154 and 155 arranged at predetermined positions of the second group lens holder 153 are magnetized in the direction as shown in FIG. In the imaging device, the movement in the A direction and the B direction in FIG. 3 is detected by the corresponding Hall elements 167 and 168 as changes in the magnetic field, and the movement amount of the second group lens holder 153 is calculated based on the change amount. is doing.

  In the configuration in which the movement amount of the second group lens holder 153 is detected in this way, the positional accuracy of the magnets 154 and 155 of the second group lens holder 153 and the corresponding hall elements 167 and 168 is important.

  Therefore, in this imaging apparatus, press-fitting portions 169a for positioning and holding the hall elements are provided at positions corresponding to the magnets 154 and 155 in the opening of the sensor holder 169 made of a rigid material. The press-fitting portions 169a are configured such that the corresponding hall elements 167 and 168 can be positioned and held at predetermined positions by being sandwiched between two claw members. Needless to say, the press-fitting portion 169a may employ positioning and holding means having various configurations as long as the Hall elements 167 and 168 can be positioned and held.

  In this imaging apparatus, each Hall element 167 and 168 is positioned with high accuracy by being assembled to the second group base 151 while being pressed into the corresponding press-fit portion 169a.

  Therefore, when the second group FPC 165 is attached to the second group base 151, the second group FPC 165 is positioned at a predetermined position on the second group base 151 with the second group FPC 165 attached on the sensor holder 169 which is a rigid body (a member having high rigidity). Place. Although not shown, the sensor holder 169 is provided with a positioning hole and a long hole, and a positioning projection provided on the second group base 151 is fitted to each of these holes so that positioning can be performed with high accuracy. The second group cover 170 is placed on the second group FPC 165 positioned on the second group base 151 in this way.

  Then, by fixing the second group cover 170 to the second group base 151 with screws 171 and an outer peripheral hook, the sensor holder 169 and the actuators 163 and 164 are attached to appropriate positions on the object side (subject side) of the second group base 151. At this time, the actuators 163 and 164 are temporarily attached to the sensor holder 169 so as to be slightly movable in a posture close to a substantially used state for the mounting operation. For this reason, the actuators 163 and 164 are pushed by the second group cover 170, moved to an appropriate position by the positioning dowels 179 and 180 and the outer shape, and are positioned and fixed.

  Next, a portion where a shutter and an ND filter are attached to the CCD (Charge Coupled Device) side of the second group lens barrel 20 will be described with reference to FIG. FIG. 4 is an exploded perspective view showing a part relating to the CCD side of the second group lens barrel 20 according to the first embodiment of the present invention.

  On the CCD side of the second group lens barrel 20, shutter blades 172 and 173 which are first light quantity regulating means are mounted. The shutter blades 172 and 173 are driven to open and close by being operated by a drive arm of a shutter actuator 163 that is a first light quantity regulating drive source.

  A partition plate 174 is attached to the second group lens barrel 20 outside the shutter blades 172 and 173.

  Further, an ND filter 175 that restricts the amount of light, which is a second light amount restricting unit, is attached to the outside of the partition plate 174 of the second group barrel 20. The ND filter 175 is driven by an actuator 164 that is a second light quantity regulating drive source, and performs an entering operation and a retracting operation into the optical path.

  A shutter cover 176 for protecting the shutter blades 172 and 173 and the ND filter 175 is fixed to the outside of the ND filter 175 of the second group lens barrel 20 with a hook (not shown).

Next, the assemblability of the second group lens barrel 20 configured as described above will be described.
When assembling such a second group lens barrel 20, a shake correction mechanism that is complicated to assemble is first assembled, and then a shutter and an ND filter are assembled. When the second group lens barrel 20 is assembled in such a procedure, workability can be improved.

  Next, an assembly process of the shake correction mechanism in the second group barrel 20 will be described. In the assembling process of the shake correcting mechanism, as shown in FIG. 5, the second group base 151 is assembled with the two-group FPC 165 and the two actuators 163 and 164 integrated into a rigid sensor holder 169 as shown in FIG. Attach to.

  That is, the second group base 151 is configured so as to be unitized so that the second group FPC 165, the two actuators 163 and 164, and the sensor holder 169 can be assembled together. Then, these units are unitized into a highly rigid FPC unit, and are assembled into the second group base 151 in one step of assembly work. Therefore, in the second group barrel 20, the actuators 163 and 164 face the second group base 151, so that the assembling property is improved. Further, by incorporating the sensor holder 169, the second group FPC 165, and the actuators 163 and 164 into an integrated FPC unit, the number of assembling steps can be reduced.

  The sensor holder 169 is used for assembling a unit obtained by temporarily fastening two actuators 163 and 164 attached to the second group FPC 165 to the second group base 151. Therefore, the sensor holder 169 is configured as a member having such rigidity that the positions of the two actuators 163 and 164 that are temporarily fixed by the elastic deformation of the sensor holder 169 during assembly work do not fluctuate. Thus, the operator can easily assemble the component unit integrated by the sensor holder 169 that is a rigid body (a member having high rigidity) to the second group base 151.

  Also, for example, as compared with the conventional assembly work when the flexible printed circuit board of the shake correction mechanism and the flexible printed circuit board of the shutter and the ND actuator are separate from each other, the work efficiency can be improved. This is because the complicated work of attaching the flexible printed circuit boards, which are two flexible components, to the second group base 151 can be reduced.

  Next, a configuration for facilitating the work of integrating the second group FPC 165, the two actuators 163 and 164, and the sensor holder 169 into the second group base 151 will be described with reference to FIG.

  FIG. 6 is a front view showing an FPC unit part in which the second group FPC 165, the sensor holder 169, and the actuators 163 and 164 according to the first embodiment of the present invention are integrated. FIG. 9 is an enlarged perspective view showing the positional relationship among the second group FPC 165, the sensor holder 169, and the actuator 164 in the FPC unit portion.

  The entire sensor holder 169 has a substantially horseshoe shape. The sensor holder 169 is provided with restricting projections 177 and 178 which are temporary fastening means at both ends thereof. That is, the limiting protrusion 177 is disposed at a position between one end of the sensor holder 169 and one actuator 163 facing the end. Further, the limiting protrusion 178 is disposed at a position between the other end of the sensor holder 169 and the other actuator 164 facing the other end. These limiting protrusions 177 and 178 are configured to sandwich the second group FPC 165 in an elastically bent state and support the second group FPC 165 in a substantially in-use posture.

  These restricting protrusions 177 and 178 project in a substantially bowl shape from the inner peripheral surface side corners of both ends of the sensor holder 169, and form a U-shaped groove with the free end side of the sensor holder 169. As a result, the restricting projections 177 and 178 form a slit having a predetermined interval with the free end side of the sensor holder 169, and sandwich the free end side of the second group FPC 165 bent substantially at right angles to the slit. Configure.

  That is, the limiting protrusions 177 and 178 are configured to sandwich and support the second group FPC 165 so as to be elastically bent in the vicinity of the connection portion between the second group FPC 165 and the actuator 163. These limiting protrusions 177 and 178 hold the second group FPC 165 in a posture that is bent by approximately 90 degrees (a posture close to the use state).

  In such a configuration, it is not necessary to provide the actuator with a shape for limiting the bending angle of the second group FPC 165. Further, since these restricting protrusions 177 and 178 are arranged in a space that is not originally used between the actuators 163 and 164 and the second group FPC 165, the size reduction of the mechanism is not hindered.

  Next, a configuration for determining the positions of the actuators 163 and 164 with respect to the second group base 151 will be described with reference to FIG.

  FIG. 7 is a perspective view showing the FPC unit portion in which the second group FPC 165, the sensor holder 169, and the actuators 163 and 164 are integrated and viewed from the back side.

  As shown in the drawing, corresponding dowels 179 and 180 are projected from predetermined positions on the bottom surfaces of the actuators 163 and 164, respectively. Although not shown, these dowels 179 and 180 are configured so that the position of the actuator 163 is determined with respect to the second group base 151 by being inserted into the corresponding positioning holes of the second group base 151.

  The actuators 163 and 164 are positioned with respect to the second group base 151 by the dowels 179 and 180 and the outer shape of the actuator. That is, the actuators 163 and 164 are positioned and held at predetermined positions by the positioning dowels 179 and 180 and the positioning guides formed on the second group base 151 so as to contact the outer peripheral surfaces of the actuators 163 and 164.

  At this time, the actuators 163 and 164 maintain the posture in the substantially used state by receiving the restoring force that the limiting protrusions 177 and 178 try to return to the original plane of the second group FPC 165. Therefore, the actuators 163 and 164 can be directly opposed to the second group base 151, and the assembly work of the actuator can be facilitated. If the limiting projections 177 and 178 are not provided, the assembling work must be performed while bending the second group FPC 165 against the elastic force to maintain the two actuators 163 and 164 in the mounting posture. become.

  Further, by incorporating the sensor holder 169, the second group FPC 165, and the actuators 163 and 164 into an integrated unit, the number of steps for assembling can be reduced. In the present embodiment, the second group FPC 165 is bent at about a right angle (bent at about 90 degrees) as an example, but the bending angle is not limited to this.

[Second Embodiment]
Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 8 is a perspective view showing an FPC unit portion according to the second embodiment. In FIG. 8, the same members as those described in FIGS. 1 to 7 described above are denoted by the same reference numerals, and detailed description thereof is omitted.

  In the second embodiment, the second group FPC 165 is not bent, and the relative positional relationship between the actuators 163 and 164 and the sensor holder 169 is limited to be constant.

  For this reason, the second group FPC 165 is configured such that a state in which the second group FPC 165 is arranged in a plane on the plane of the sensor holder 169 is a use state. In the second embodiment, a rigid flat printed board (circuit board) made of a rigid material may be used instead of the second group FPC 165.

  At the same time, the actuators 163 and 164 are implanted with metal studs 181 and 182 that extend in the same direction as the extending direction of the metal studs 160 and 161 of the coil units 158 and 159 in the state of use. To do. Although not shown, the metal stud (first light quantity regulating drive source stud) 182 is connected to the coil of the actuator 163. Further, the metal stud (second light quantity regulating drive source stud) 182 is connected to the coil of the actuator 164, although not shown.

  The metal studs 181 and 182 of the actuators 163 and 164 are electrically connected to predetermined connection portions of the second group FPC 165 by solder brazing.

  In the second embodiment, as described above, the metal studs 181 and 182 of the actuators 163 and 164 and the metal studs 160 and 161 of the coil units 158 and 159 are configured to extend in the same direction. Therefore, the second group FPC 165 does not need to be bent and can be arranged on the second group FPC 165 in a plane.

  In the second embodiment, the second group FPC 165 in a state where the two actuators 163 and 164 are connected is mounted on the sensor holder 169 in a planar manner and temporarily fixed by a temporary fixing means. Certain limiting hooks 183, 184 are provided.

  The restricting hooks 183 and 184 are projected in a hook shape from a predetermined position on the inner peripheral side in the vicinity of the connection portion of the sensor holder 169 with the actuator 163 of the second group FPC 165. The limit hooks 183 and 184 hold the second group FPC 165 and the sensor holder 169 in an integrated state so that the free ends thereof sandwich the second group FPC 165 with the plane of the sensor holder 169.

  In the FPC unit of the second embodiment configured as described above, the second group FPC 165 is attached to the sensor holder 169 while maintaining a flat surface, so that the elastic restoring force of the second group FPC 165 does not work. Thereby, in the actuators 163 and 164 of the FPC unit, the relative position to the sensor holder 169 does not become unstable due to the flexibility of the second group FPC 165.

  For this reason, when the FPC unit is incorporated into the second group base 151, the actuators 163 and 164 face the second group base 151 in use, so that the assembling work can be performed easily and quickly, so that the work efficiency can be improved. Further, by making the sensor holder 169, the second group FPC 165, and the actuators 163 and 164 into an integrated FPC unit, it is possible to reduce the number of assembling steps so that they can be assembled in one step.

  Note that the configurations, operations, and effects of the second embodiment other than those described above are the same as those of the first embodiment described above, and thus description thereof is omitted.

It is a disassembled perspective view which shows the components of the lens-barrel part used as the principal part in the imaging device concerning 1st Embodiment of this invention. FIG. 3 is an exploded perspective view showing an object side (subject side) portion of the second group barrel according to the first embodiment of the present invention. It is a front view which shows the place which looked at the state which removed the sensor holder in 2 group barrel concerning 1st Embodiment of this invention, 2 group FPC, and 2 group cover from the to-be-photographed object side. FIG. 3 is an exploded perspective view showing a part relating to the CCD side of the second group barrel according to the first embodiment of the present invention. It is a disassembled perspective view which shows one of the assembly process of the shake correction mechanism concerning 1st Embodiment of this invention. It is a front view which takes out and shows the FPC unit part to which 2nd group FPC concerning 1st Embodiment of this invention, the sensor holder, and the actuator were united. It is a perspective view which shows the place which took out the FPC unit part which 2nd group FPC concerning 1st Embodiment of this invention, the sensor holder, and the actuator were united, and was seen from the back side. It is a perspective view which takes out and shows the FPC unit part concerning 2nd Embodiment of this invention. It is a perspective view which expands and shows the positional relationship of 2nd group FPC of the FPC unit part concerning 1st Embodiment of this invention, a sensor holder, and an actuator.

Explanation of symbols

1 Group 1 lens 2 Group 2 lens 3 Group lens 20 Group 2 lens barrel 151 Base 158 Coil unit 159 Coil unit 160 Metal stud 161 Metal stud 163 Actuator 164 Actuator 165 Group 2 FPC
166 Land 169 Sensor holder

Claims (2)

In an imaging apparatus provided with a lens barrel that constitutes an imaging optical system,
A first light quantity regulating drive source for driving first light quantity regulating means mounted on the lens barrel;
A second light amount restriction drive source for driving second light amount restriction means mounted on the lens barrel;
A flexible board formed entirely in a curved plate shape, connected to the first free light restriction drive source at one free end, and connected to the second free light restriction drive source at the other free end;
It is formed in a curved shape so as to overlap the flexible substrate, and the first light quantity regulation drive source is exposed to one free end and the second light quantity regulation drive source is exposed to the other free end. A holding member made of a rigid material configured to be unitized by attaching the flexible substrate;
Supporting the flexible substrate in an elastically bent state at each free end of the holding member so as to maintain the first light quantity restriction drive source and the second light quantity restriction drive source in a posture close to a use state. In order to do so, a position between one free end of the holding member and the first light quantity restriction drive source, and a position between the other free end of the holding member and the second light quantity restriction drive source. And temporary fastening means arranged respectively,
A base of the lens barrel in which the holding member is incorporated with the flexible substrate and the first and second light quantity regulating drive sources attached thereto; and
An imaging device comprising: In an imaging apparatus provided with a lens barrel that constitutes an imaging optical system,
Displacement optical member driving means for driving the displacement optical member constituting a part of the photographing optical system to be displaced with respect to the optical axis, provided in the correction mechanism attached to the lens barrel;
A first light quantity regulating drive source for driving first light quantity regulating means mounted on the lens barrel;
A second light amount restriction drive source for driving second light amount restriction means mounted on the lens barrel;
A stud for displacement optical member driving means planted so as to extend in a rod shape from the displacement optical member driving means;
A first stud for restricting the light quantity driving source planted so as to extend from the first light quantity regulating drive source in a rod shape;
A second light quantity regulating drive source stud planted to extend in a rod shape from the second light quantity regulating drive source;
The displacement optical member driving means stud, the first light quantity regulating drive source stud, and the second light quantity regulating drive source stud are respectively connected to corresponding connection positions in a state where the extending directions are the same direction. An electrically connected circuit board;
The circuit board on which at least the first light quantity regulation drive source and the second light quantity regulation drive source are mounted is placed in a plane, and is temporarily clamped and held by a temporary fastening means so as to be unitized. Holding member made of rigid material,
A base of the lens barrel in which the holding member is incorporated with the circuit board and the first and second light quantity regulation drive sources attached thereto;
An imaging device comprising:

Images