JP2000258813A - Image blur correcting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the width and the height of an image blur correcting device by disposing a 1st guiding means and a part of a 2nd driving means or a 2nd guiding means and a part of a 1st driving means at positions where they are superposed each other as seen from an optical axis direction. SOLUTION: An actuator Ap consisting of a coil 6a, a magnet 7a and a yoke 8a for driving an image blur correction lens L1 in a pitch direction is arranged in a subject direction (direction shown by an arrow P) from the guide 5b of a yaw frame 2, and constituted so that they may be superposed as seen from the optical axis. Namely, the guide shaft 5b for moving the lens L1 and the coil 6a or the magnet 7a for driving the lens L1 are arranged so that a pitch moving means and a yaw-driving means or a yaw moving means and a pitch driving means are superposed as seen from the optical axis direction. Thus, the width and the height of this correcting device are reduced. Furthermore, a member to be engaged which is engaged with a regulating member is provided on a fixed frame 4, whereby the compact correcting device is constituted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] 1. Field of the Invention [0002] The present invention relates to an image blur correction device used for an optical apparatus such as a video movie and a lens barrel using the same.

[0002]

2. Description of the Related Art In recent years, with the spread of digital video movies, an ultra-small and high-quality image blur correction device has been desired. In such an image blur correction apparatus, there is an image blur correction apparatus in which a part of a photographing lens is driven in a plane perpendicular to an optical axis to perform correction. In this method, a driving unit is provided in two axial directions with respect to the movable lens to move the lens, and a regulating member that regulates a movable range is provided. Regarding the configuration of such an image blur correction device, an image blur correction device described in, for example, Japanese Patent No. 2641172 has been proposed.

Hereinafter, the structure of a conventional image blur correction device will be briefly described with reference to FIG.

In FIG. 1, a fixed frame 23 for holding a correction lens 22 can slide on a pitch shaft 25 via a bearing (oilless metal) 24. The pitch shaft 25 is fixed to the first holding frame 26. A pitch coil 28 is attached to the fixed frame 23. The pitch coil 28 is placed in a magnetic circuit composed of a pitch magnet 29 and a pitch yoke 210, and a current flows through the coil to fix the fixed frame 23.
Are driven in the pitch direction with respect to the first holding frame 26.

[0005] The pitch magnet 29 is mounted on the stator 220, and the pitch yoke 210 is mounted on the second holding frame 21.
9 attached. The first holding frame 26 includes a yaw shaft 215 and a yaw shaft 215 extending in the yaw direction.
The housing 217 includes a bearing (oiles metal) 24 that slides upward.

Since the housing 217 is fixed to the second holding frame 219, the first holding frame 26 is
19 can be freely moved in the yaw direction. The first holding frame 26 is provided with a yaw coil 221 similarly to the fixed frame 23, and the yaw coil 221 is connected to the second holding frame 219.
Yoke 222 and yaw yoke 22 attached to
220 fixed to and separated from stopper 2 by stopper 223
Is placed in a magnetic circuit composed of a yaw magnet (not shown) attached to the
The holding frame 26 is driven in the yaw direction with respect to the second holding frame 219.

[0007]

However, the above-mentioned conventional image blur correction apparatus has the following problems.

Since the shaft for guiding the movement and the coil for driving in the movement direction are arranged side by side with respect to the correction lens without overlapping when viewed from the optical axis direction, the width and height of the correction device are high. There is a problem that the size cannot be reduced.

[0009]

SUMMARY OF THE INVENTION Accordingly, an image blur correction apparatus according to the present invention is directed to an image blur correction apparatus which performs image blur correction by moving a part of a taking lens in a plane perpendicular to an optical axis. A lens holding frame for holding the lens, first guiding means for guiding the movement of the lens holding frame in a plane perpendicular to the optical axis in a first direction, and moving the lens holding frame with respect to the first direction. A second guide for guiding movement in a second direction orthogonal to the first direction, a first drive for driving the lens holding frame in the first direction, and a second drive for driving the lens holding frame in the second direction. ,
And a position detecting means for detecting a position of the correction lens, wherein the first guiding means and a part of the second driving means or a part of the second guiding means and the first driving means are lighted. They are arranged at overlapping positions when viewed from the axial direction.

With this configuration, a guide shaft for moving the correction lens and a coil or magnet for driving can be provided by a pitch moving unit and a yaw driving unit, or a yaw moving unit and a pitch driving unit. The width and height of the image blur correction device can be reduced by arranging them so as to overlap each other when viewed from the optical axis direction.

An image blur correction apparatus according to the present invention is an image blur correction apparatus for performing image blur correction by moving a part of a photographing lens in a plane perpendicular to an optical axis while holding the correction lens and correcting the image blur. A lens holding frame provided with a first restricting portion for restricting a movement range of the lens, first guide means for guiding the movement of the lens holding frame in a first direction in a plane perpendicular to the optical axis, A second guide unit that guides the movement of the lens holding frame in a second direction orthogonal to the first direction, a first driving unit that drives the lens holding frame in the first direction,
Second driving means for driving in the second direction, position detecting means for detecting the position of the correction lens, and second restricting section for restricting the movable range of the correction lens by engaging with the first restricting section. Wherein the first and second restricting portions are substantially concentric with respect to the optical axis and inside the first and second driving means.

With such a configuration, in order to regulate the movable range of the correction lens, a regulating member is disposed substantially concentrically with respect to the optical axis between the correcting lens and the driving means, and is engaged with the regulating member. By providing the non-engaging member to the fixing means, the size of the image blur correction device can be reduced.

Further, in the image blur correction apparatus of the present invention, the first and second driving means are arranged at positions not on the same plane, and the first and second driving means are arranged on the image plane side. The position detecting means is provided on the object side of the driving means or on the image plane side of the driving means arranged on the subject side.

With this configuration, the pitch driving means and the yaw driving means are arranged so as to be shifted in the direction of the optical axis so as to form a step, and the position detecting means is arranged at the step to provide an optical axis. The space in the direction can be effectively used, and the size of the device can be reduced.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to FIGS.

FIG. 1 is a front view of the image blur correction device according to the present embodiment. FIG. 2 is a sectional view taken along line Y1-Y2 in FIG.
FIG. 3 is an X2-O-Y2 cross-sectional view in FIG.

L1 is an image blur correction lens, and L2 is a fixed lens.

The image blur correction lens L1 is held by a pitch frame 1, and the two shafts 3a and 3b provided on a yaw frame 2 for moving the correction lens L1 in the yawing direction are used as guides in the pitching direction (up and down). It can be moved to. Further, the fixed frame 4 is provided with two shafts 5a and 5b, and the yaw frame 2 is movable in the yawing (left and right) directions using the two shafts 5a and 5b as guides.

Thus, the image blur correction lens L1 can be moved in the pitch / yaw direction with respect to the fixed frame 4.

The pitch frame 1 and the yaw frame 2 are provided with coils 6a and 6b, respectively, and the magnets 7a and b having two poles are provided on the yokes 8a and 8b at positions opposed to the coils 6a and 6b. The yokes 8 a and 8 b are fixed to the fixed frame 4. The magnets 7a and b and the coils 6a and 6b constitute a magnetic circuit, and the coils 1a and 1b are energized to drive the pitch frame 1 and the yaw frame 2 in predetermined directions.

An actuator Ap composed of a coil 6a, a magnet 7a, and a yoke 8a for driving the image blur correction lens L1 in the pitch direction is arranged in the direction of the subject (in the direction of the arrow P) from the guide 5b of the yaw frame 2 and light. They are configured to overlap when viewed from the axis.

An actuator Ay composed of a coil 6b, a magnet 7b, and a yoke 8b for driving the image blur correction lens L1 in the yaw direction is arranged on the image plane side (in the direction of the arrow Q) from the guide 3b of the pitch frame 1, and They are configured to overlap when viewed from the axis. In the present embodiment, the actuator Ap is configured such that a step is provided in the subject direction with respect to the actuator Ay.

Accordingly, when the image blur correction device is viewed from the optical axis direction, the guide portion and the actuator portion are arranged so as to overlap each other, so that the size in the width and height directions can be reduced.

Further, the pitch frame 1 is provided with an LED 9 for detecting the position of the image blur correction lens L1 with respect to the fixed frame 4. A position detecting element (PSD) 10 which can detect a position in a biaxial direction (pitch / yaw direction) at a position opposed to the LED 9 and at a predetermined interval is mounted on the boss 4a of the fixed frame 4 via the printed circuit board 11. It is fixed. The PSD 10 is arranged on the subject side of the yoke 8b (in the direction of the arrow P). Thereby, the position detecting means (the LED 9 and the PSD 9) are provided in the space generated by making the guide portion and the actuator portion overlap.
By effectively arranging 10), the components in the apparatus are arranged with high density, and the apparatus is downsized.

The pitch frame 1 has ribs 1 concentric with the optical axis for regulating the movable range of the image blur correction lens L1.
a is provided. The position of the rib 1a depends on the effective diameter of the image blur correction lens L1 and the fixed lens L2, the yoke 8a,
b or between the magnets 7a and 7b. By providing the fixed frame 4 with a projection 4b that engages with the rib 1a, the movable range of the image blur correction lens L1 is regulated.

In this embodiment, the position detecting means (LE
Although the D / PSD is provided on the object side of the yoke 8a, it may be provided on the image surface side of the yoke 8b.

Although the movable range is regulated concentrically with respect to the optical axis, it is not necessary to provide the movable range over the entire circumference, and the movable range may be partially configured as long as the movable range can be regulated.

As a position detecting means, an LED and a PS are used.
Although D is used, it is not limited to this as long as the position can be detected. For example, there are a magnet magnetized at a predetermined interval and a magnetoresistive element.

As described above, according to this embodiment,
A guide shaft for moving the image blur correction lens and a coil or magnet for driving, a pitch moving unit and a yaw driving unit, or a yaw moving unit and a pitch driving unit viewed from the optical axis direction, By arranging them so as to overlap, the width and height of the correction device can be reduced.

In order to regulate the movable range of the correction lens, a restricting member is disposed between the correction lens and the driving means substantially concentrically with respect to the optical axis, and a non-engaging member engaged with the restricting member is provided. Is provided on the fixed frame, a small image blur correction device can be configured. Furthermore, since the non-engaging portion is the outer periphery of the holding portion of the fixed lens, the movement can be restricted without newly forming a non-engaging portion such as a projection.
More miniaturization can be performed.

Further, the pitch driving means and the yoke driving means are arranged so that a step is formed in the optical axis direction, and the position detecting means is arranged at the step, so that the space in the optical axis direction is made effective. The components can be arranged in the device at a high density by utilizing the device, and the size of the device can be reduced.

[0032]

As described above, according to the present invention, the guide shaft for moving the correction lens and the coil or magnet for driving are provided by the pitch moving means and the yaw driving means, or the yaw moving means and the pitch. By arranging the driving means so that they overlap when viewed from the optical axis direction, the width and height of the correction device can be reduced.

According to the present invention, in order to regulate the movable range of the correction lens, a movable regulating member is disposed substantially concentrically with respect to the optical axis between the correcting lens and the driving means. By providing the non-associating member that is connected to the fixed frame to the fixed frame, it is possible to restrict the movement inside the movable portion, so that a small correction device can be configured.

Further, according to the present invention, the pitch driving means and the yoke driving means are arranged so as to be shifted with respect to the optical axis direction so as to form a step, and the position detecting means is arranged at the step to provide light. By arranging the device by effectively utilizing the space in the axial direction, the size of the device can be reduced.

[Brief description of the drawings]

FIG. 1 is a front view of an image blur correction apparatus according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line Y1-Y2 in FIG.

FIG. 3 is a sectional view taken along line X2-OY2 in FIG. 1;

[Explanation of symbols]

 L1 image blur correction lens L2 fixed lens 1 pitch frame 2 yaw frame 3ab guide shaft 4 fixed frame 5ab guide shaft 6ab coil 7ab Magnet 8ab ·· Yoke 9 ·· LED 10 ··· PSD Ap ··· Pitch direction drive actuator Ay ·· Yaw direction drive actuator

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Yutaka Takahashi 1006 Kadoma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. F term (reference) 5C022 AA11 AB43 AB55 AB62 AC54 AC69 AC74 AC77 AC78 CA00

Claims (3)

[Claims] 1. An image blur correction apparatus for performing image blur correction by moving a part of a taking lens in a plane perpendicular to an optical axis, wherein a lens holding frame for holding a correction lens, and First guiding means for guiding movement in a first direction in a plane perpendicular to an axis;
Second guiding means for guiding movement in a second direction orthogonal to the direction of the first direction, first driving means for driving the lens holding frame in a first direction, and driving in a second direction. A second drive unit; and a position detection unit that detects a position of the correction lens. The first guide unit and a part of the second drive unit or the second guide unit and the first guide unit. An image blur correction device, wherein a part of the driving means is disposed at an overlapping position when viewed from the optical axis direction. 2. An image blur correction apparatus for performing image blur correction by moving a part of a photographing lens in a plane perpendicular to an optical axis, wherein the image blur correction apparatus holds a correction lens and regulates a moving range of the correction lens. A lens holding frame provided with the first restricting portion;
First guiding means for guiding the movement in the direction of the arrow, second guiding means for guiding the movement of the lens holding frame in a second direction orthogonal to the first direction, and the lens holding frame. A first driving unit that drives the first lens unit in a first direction, a second driving unit that drives the second lens unit in a second direction, a position detection unit that detects the position of the correction lens, and the first regulating unit. And fixing means having a second restricting portion for restricting a movable range of the correction lens. The first and second restricting portions are substantially concentric with respect to the optical axis and have a first and a second shape. An image blur correction device disposed inside the second driving means. 3. A method according to claim 1, wherein the first and second driving means are arranged at positions not on the same plane, and the first and second driving means are arranged on the object side or the object side of the driving means arranged on the image plane side. 3. The image blur correction device according to claim 1, wherein the position detection unit is disposed on an image plane side of the disposed driving unit.