JP2011133777A - Image blur correcting device and imaging unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To automatically carry out the centering of a lens for correction in a rest state while achieving simplification and miniaturization of the structure, simplification and facilitation of assembling work, etc. in an image blur correcting device. <P>SOLUTION: The image blur correcting device includes a base, a movable holding member, a supporting mechanism for supporting the movable holding member in such a manner that it can be freely moved, a driving means for driving the movable holding member, a position detecting means, and a return means for returning the movable holding member to a rest position. The driving means includes coils 221 and 231 fixed to the base, and driving magnets 222 and 232 fixed to the movable holding member. The return means includes return magnets 261 and 262 fixed to the base. The position detecting means includes magnetic sensors 271 and 272 fixed to the base. The supporting mechanism includes at least three recessed parts 201i provided to the base, at least three spheres 250 disposed at the recessed parts, and at least three contact surfaces 214 provided to the movable holding member that contact the spheres. By this arrangement, simplification, miniaturization and reduction in thickness of the structure can be achieved. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image shake correction device mounted on a lens barrel or shutter unit of a digital camera, and an image pickup unit including the image shake correction device, and more particularly to a camera mounted on a portable information terminal such as a mobile phone. The present invention relates to a small and thin image blur correction apparatus and an imaging unit applied to a unit.

As a conventional image blur correction device, a substantially rectangular base having an opening in the center, a first guide shaft provided on the front surface of the base, and a first guide shaft supported reciprocally along the first guide shaft. A first movable member, a second guide shaft oriented in the direction of 90 degrees with respect to the first guide shaft and provided on the front surface of the first movable member; a lens which is supported so as to reciprocate along the second guide shaft; A second movable member that holds the first movable member, a first drive device that reciprocates the first movable member and the second movable member together in the direction of the first guide shaft, and a second movable member that reciprocates in the direction of the second guide shaft. 2. Description of the Related Art There is known a device that includes a second drive device to be moved, and employs a voice coil motor including a coil and a magnet as the first drive device and the second drive device (see, for example, Patent Document 1).
However, this apparatus has a two-stage configuration in which the first movable member and the second movable member are arranged in the optical axis direction, which leads to an increase in the size of the apparatus in the optical axis direction. Further, although the second driving device drives only the second movable member, the first driving device needs to drive not only the first movable member but also the second movable member and the second guide shaft together. Compared with the case where only the movable member is driven, a larger driving force must be generated, leading to an increase in the size of the first driving device. Furthermore, since the driving load of the first driving device and the driving load of the second driving device are different, driving control for positioning the lens in a plane perpendicular to the optical axis is not easy.

As another image blur correction apparatus, a substantially rectangular base having an opening, four elastic support members (wires) that are implanted in the four front corners of the base and extend in the optical axis direction, and four A movable member that holds the lens by connecting the tip of the elastic support member, a first magnet and a first yoke provided on the movable member, a second magnet and a second yoke provided on the movable member, and a base Includes a substantially rectangular fixed frame that is fixed to another different member and is disposed in front of the movable member and holds the first coil and the second coil. The first magnet, the first yoke, and the first coil are the first ones. The driving means is constituted, the second magnet, the second yoke, and the second coil constitute second driving means, the first driving means drives the movable member in the first direction perpendicular to the optical axis, and the second driving means To move the movable member perpendicular to the optical axis and the first direction. Those to be driven in the direction is known (e.g., refer to Patent Document 2, Patent Document 3).
However, in this apparatus, the movable member is supported by the base using four elastic support members (wires) extending in the optical axis direction, and further, a fixed frame that holds the coil by another member in front of the movable member. This increases the size of the device in the optical axis direction, and the connecting portions of the four elastic support members are not rigidly linked but are rigidly connected, so that the movable member (lens) is connected to the optical axis. In addition to being moved in the vertical plane direction, there is a risk of tilting with respect to the optical axis, and there is a risk that desired return characteristics may not be obtained due to the aging of the elastic support member (wire). Even if the base and the movable member are connected, the fixed frame for holding the coil is not integrally connected. Therefore, it cannot be modularized as an image blur correction device, and is inconvenient to handle. The first and second magnets of the movable member and the first and second coils of the fixed frame cannot be aligned with respect to one member (for example, the base), and the assembly work of the apparatus is troublesome. .

As another image blur correction apparatus, a base, a movable member holding a lens, three balls and a coil spring as a support mechanism for supporting the movable member with respect to the base, and an optical axis There are known driving means (driving magnet, coil, yoke) for driving in a direction perpendicular to the head and position detecting means (magnet, Hall element) for detecting the position of the movable member (for example, (See Patent Document 4).
In this apparatus, since three rolling balls are interposed between the movable member and the base, the apparatus can be thinned in the optical axis direction, but the movable member is always in contact with the three balls. The urging force is exerted by the coil spring so as to be supported, and the urging force of the coil spring acts as a resistance force, that is, a driving load when driving the movable member, so that the driving means counters the urging force of the coil spring. It is necessary to generate a driving force as much as possible, and the operation of hooking the coil spring is troublesome, and the entire assembly operation is not easy.

Further, as another image blur correction device, a base, a movable member that holds a lens, a first drive unit (magnet, coil, yoke) and a second drive for driving the movable member in two directions perpendicular to the optical axis. There are known means (magnet, coil, yoke) and two assist springs for returning the movable member to the center position (centering) in the non-energized state (resting state) in which the coil is not energized. (For example, see Patent Document 5).
In this apparatus, an assist spring is used as a return means for returning the movable member to the center position. Therefore, an installation space for the assist spring is required, resulting in an increase in the size of the apparatus. The work of hanging is troublesome, and the whole assembly work is not easy.

JP 2007-286318 A JP 2008-64846 A JP 2007-233214 A Japanese Patent No. 3969927 Japanese Patent No. 3869926

  The present invention has been made in view of the above circumstances, and its object is to simplify the structure and reduce the size and thickness of the device in the optical axis direction of the lens and in the direction perpendicular to the optical axis direction. It can be mounted on a camera unit such as a mobile phone while simplifying and facilitating the assembly work, and it can correct image shake due to camera shake with high accuracy, and can also be used for correction in a resting state. It is an object of the present invention to provide an image shake correction apparatus capable of automatically returning (centering) the lens to a predetermined rest position, and an imaging unit including the image shake correction apparatus.

  An image shake correction apparatus according to the present invention includes a base having an opening, a movable holding member that holds a lens, a support mechanism that supports the movable holding member in a plane perpendicular to the optical axis of the lens, and a movable holding An image shake correction apparatus comprising: a drive unit that drives a member in the plane; a position detection unit that detects a position of the movable holding member; and a return unit that returns the movable holding member to a predetermined pause position in a pause state. The driving means includes a coil fixed to one of the base and the movable holding member, and a driving magnet fixed to the other of the base and the movable holding member at a position facing the coil, and the return means includes: A return magnet fixed to one of the base and the movable holding member so as to generate a magnetic force that opposes the drive magnet and returns to the rest position, and the position detecting means is located at a position facing the drive magnet. The support mechanism includes a magnetic sensor fixed to one of the base and the movable holding member, and the support mechanism rolls in a state of projecting into at least three concave portions provided in one of the base and the movable holding member. It includes at least three spheres that are freely arranged, and at least three abutment surfaces that are provided on the other of the base and the movable holding member and abut against the at least three spheres.

According to this configuration, the movable holding member cooperates with the drive magnet by energizing the coil in a state in which the movable holding member is movably supported by the relationship between the spherical body arranged in the concave portion serving as a support mechanism and the contact surface. The generated driving force can be two-dimensionally moved in a plane perpendicular to the optical axis with respect to the base, and image blur due to camera shake or the like can be corrected with high accuracy.
Here, when the movable holding member is arranged so as to face the base so that the spherical body is arranged in the concave portion and the contact surface comes into contact, the return magnet fixed to one of the base and the movable holding member is fixed to the other. Since the drive magnets exert a magnetic attractive force on each other, the movable holding member can be incorporated in a movable manner with respect to the base without using a conventional spring that exerts an urging force.
Further, a magnetic attraction action is obtained between the return magnet and the drive magnet, and the movable holding member (lens) is automatically returned (for example, centered) to a predetermined rest position and stably held. . Therefore, drive control such as initialization is not required during driving, and rattling of the movable holding member can be prevented in the resting state. Thus, since the drive magnet of the drive means is also used as a magnet that magnetically interacts with the return magnet, the structure can be simplified, the apparatus can be downsized, and the like.

In the above configuration, the movable holding member includes a holding portion that holds a lens whose outer periphery is partially cut and fits, two extending portions that extend on both sides of the holding portion, and at least three abutments And the base surrounds an opening formed in a region facing the holding portion, at least three recesses formed in a region facing the at least three contact surfaces, and the movable holding member. A case-like base that defines the outer peripheral wall formed in the case, and the case-like base is detachable from the case-like base so as to restrict the movable holding member from separating in the direction of the optical axis while the sphere and the movable holding member are accommodated in the case-like base. A configuration including a cover-like base to be joined can be employed.
According to this configuration, when assembling the device, the sphere is fitted into the recess of the case-like base, and the movable holding member is fitted into the case-like base so that the abutting surface comes into contact with the sphere from above. By attaching a cover-like base, the assembly work of the device can be easily performed with a simple procedure, the device can be thinned in the optical axis direction, and can be moved in a direction perpendicular to the optical axis. The width and size of the device can be reduced in the direction perpendicular to the longitudinal direction of the holding member. In addition to the magnetic attraction force of the return magnet and the drive magnet, a cover-like base is provided so that the movable holding member is movably supported with respect to the base and receives impact force from the outside. However, it is possible to reliably prevent the movable holding member from being detached from the base in the optical axis direction. Furthermore, by accommodating the movable holding member and the sphere in the case-like base and connecting the cover-like base from above, the apparatus can be provided as a module product convenient for handling.

  In the above configuration, the drive means includes a first drive mechanism that drives in a first direction in the plane (a plane perpendicular to the optical axis of the lens), and a second drive mechanism that drives in a second direction in the plane. The coil includes a first coil included in the first drive mechanism and a second coil included in the second drive mechanism, and the drive magnet is included in the first drive mechanism and faces the first coil. And a second drive magnet that is included in the second drive mechanism and faces the second coil, and the return magnet includes a first return magnet that faces the first drive magnet, and a second return magnet that faces the second drive magnet. The magnetic sensor includes a first magnetic sensor facing the first drive magnet and a second magnetic sensor facing the second drive magnet, and the first drive mechanism moves the movable holding member within the plane and its The first drive magnet is driven in a direction perpendicular to the longitudinal direction. The dynamic holding member is composed of two drive magnets respectively disposed on the two extending portions across the holding portion, and the first coil faces the two drive magnets of the first drive magnet on the case-like base, respectively. The first return magnet is composed of two return magnets arranged so as to face the two drive magnets of the first drive magnet in the case-like base, respectively. The sensor may employ a configuration including at least one magnetic sensor disposed on the cover-like base so as to face at least one of the two drive magnets of the first drive magnet.

According to this configuration, the movable holding member is moved in a plane perpendicular to the optical axis by the first drive mechanism (first drive magnet, first coil) and the second drive mechanism (second drive magnet, second coil). The movable holding member is returned to a predetermined rest position by the magnetic attraction action of the first return magnet and the first drive magnet and the magnetic attraction action of the second return magnet and the second drive magnet. Can be positioned and held.
Further, the first drive mechanism for driving the movable holding member in the first direction perpendicular to the longitudinal direction thereof includes two drive magnets arranged on both sides of the movable holding member in the longitudinal direction, and 2 corresponding to the two drive magnets. Since it consists of two coils, when generating a driving force in the first direction, the driving force is generated on both sides in the longitudinal direction of the movable holding member, and it is possible to prevent the generation of a rotating moment that rotates the movable holding member. The movable holding member can be driven with high accuracy with a simple configuration. It is sufficient that the first magnetic sensor is arranged so as to face at least one of the drive magnets, but by adopting two magnetic sensors arranged so as to face each of the two drive magnets, The position of the movable holding member (lens) can be driven with higher accuracy.

In the configuration in which the first drive magnet is composed of two drive magnets, at least two of the at least three spheres have an extension portion on one side and an extension portion on the other side across the holding portion of the movable holding member. And at least two of the at least three recesses are arranged at positions corresponding to the at least two spheres, and at least two of the at least three contact surfaces. Can be configured to be arranged at positions corresponding to the at least two spheres.
According to this configuration, the movable holding member can be evenly supported without deviation in the longitudinal direction, and therefore, the movable holding member can be driven smoothly and with high accuracy to be positioned at a desired position.

Further, an imaging lens unit of the present invention is characterized by including an image shake correction device having the above-described configuration, a plurality of imaging lenses, an imaging element, and a housing.
According to this configuration, in the configuration in which the plurality of imaging lenses are arranged in the optical axis direction, the correction lens held by the movable holding member is appropriately driven by including the image blur correction device. Thus, image blur due to camera shake or the like can be corrected smoothly and with high accuracy.
That is, it is possible to provide an imaging unit to which the above-described image blur correction function is added in addition to a plurality of lenses for imaging, an imaging element, and a housing.

  According to the image shake correcting apparatus having the above-described configuration, the structure is simplified, the apparatus is downsized and thinned in the optical axis direction and the direction perpendicular to the optical axis direction, the assembling work is simplified and facilitated, and the like. It can be mounted on a camera unit such as a mobile phone while achieving it, and image blur due to camera shake can be corrected with high accuracy, and the correction lens is automatically set to a predetermined pause position in the pause state. An image blur correction device that can be returned (centered) can be obtained, and an imaging unit including the image blur correction device can be obtained.

It is a perspective view which shows the portable information terminal which mounts the camera unit in which the image blur correction apparatus of this invention was integrated. It is a top view which shows the inside of a camera unit. It is a sectional side view which shows the inside of a camera unit. It is a block diagram which shows the control system of an image blurring correction apparatus. It is a perspective view of an image blur correction device. It is a disassembled perspective view of an image blur correction apparatus. It is sectional drawing of an image blur correction apparatus. It is a front view which shows the state which removed the cover-like base from the image blurring correction apparatus. FIG. 6 is a front view illustrating a state in which a cover-like base and a movable holding member are removed from the image blur correction device. It is a front view which shows the movable holding member contained in an image shake correction apparatus. It is a rear view which shows the movable holding member contained in an image shake correction apparatus. (A), (b), (c) is a top view explaining operation | movement of an image blur correction apparatus. (A), (b), (c) is a top view explaining operation | movement of an image blur correction apparatus. FIG. 10 is a front view illustrating another embodiment of the image blur correction device and illustrating a state in which a cover-like base is removed. FIG. 14 is a front view showing still another embodiment of the image blur correction device and showing a state in which a cover-like base is removed.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
As shown in FIG. 1, the camera unit U incorporating the image blur correction device is mounted on a flat and small portable information terminal PH. The portable information terminal PH includes a housing PH1 having a substantially rectangular shape and a flat outline, a display portion PH2 such as a liquid crystal panel arranged on the surface of the housing PH1, a control button PH3, and a display portion PH2. A photographing window PH4 and the like formed on the opposite surface are provided. As shown in FIG. 1, the camera unit U is accommodated in the housing PH1 so as to extend in a direction perpendicular to the optical axis L1 of the subject light entering from the photographing window PH4.

  As shown in FIGS. 2, 3, and 4, the camera unit U holds a unit case 10 as a housing, a prism 20, lenses G1 and G2, a first movable lens group 30 that holds the lens G3, and a lens G4. The second fixed lens group 30 ′, the third movable lens group 30 ″ holding the lens G5, the image blur correction device M as the fourth fixed lens group holding the lenses G6 and G7, the filter 40, and the image sensor. CCD 50, first drive unit 60 for driving first movable lens group 30 in the direction of optical axis L2, second drive unit 70 for driving third movable lens group 30 ″ in the direction of optical axis L2, angular velocity sensor 80, control unit 90 grade.

As shown in FIGS. 2 and 3, the unit case 10 is formed in a flat and substantially rectangular shape so that the thickness dimension in the optical axis L1 direction is thin, and the protruding portion 11 that fixes the prism 20. , A holding unit 12 that holds the lenses G1 and G2, a holding unit 13 that fixes and holds the second fixed lens group 30 ′, and a holding unit 13 that holds and holds the fourth fixed lens group (image blur correction device M). ′, A holding unit 14 that holds the filter 40 fixedly, a holding unit 15 that holds the CCD 50 fixedly, and the like.
As shown in FIGS. 2 and 3, the prism 20 is accommodated in the protruding portion 11 of the unit case 10, and guides the optical axis L1 of the subject light entering from the photographing window PH4 in the direction of the optical axis L2 by bending it at a right angle. It is like that.
As shown in FIGS. 2 and 3, the lenses G <b> 1 and G <b> 2 are arranged behind the prism 20 in the directions of the optical axes L <b> 1 and L <b> 2 and are fixed to the holding portion 12 of the unit case 10.

As shown in FIGS. 2 and 3, the first movable lens group 30 is disposed behind the lens G2 in the optical axis L2 direction, holds the lens G3, and is supported so as to be movable in the optical axis L2 direction. The first drive unit 60 is driven to reciprocate in the direction of the optical axis L2.
That is, the first movable lens group 30 is slidably engaged with the lens holding member 31, the guided portion 32 guided by the guide shaft 61, and the rotation preventing shaft 62, and the rotation about the optical axis L2 is restricted. A regulated portion 33, a U-shaped engagement portion 34 with which a nut 65 screwed to the lead screw 63 abuts, and the like are provided.

2 and 3, the second fixed lens group 30 'is disposed behind the first movable lens group 30 in the direction of the optical axis L2, holds the lens G4, and cannot move in the direction of the optical axis L2. It is fixed to the holding part 13 of the unit case 10.
As shown in FIGS. 2 and 3, the third movable lens group 30 ″ is disposed behind the second fixed lens group 30 ′ in the optical axis L2 direction, holds the lens G5, and moves in the optical axis L2 direction. The second drive unit 70 is reciprocally driven in the optical axis L2 direction.
That is, the third movable lens group 30 ″ is slidably engaged with the lens holding member 31 ″, the guided portion 32 ″ guided by the guide shaft 61, and the detent shaft 62, and is rotated about the optical axis L 2. And a U-shaped engagement portion 34 ″ with which a nut 75 screwed to the lead screw 73 abuts.

As shown in FIGS. 2 and 3, the fourth fixed lens group (image blur correction device M) is disposed behind the third movable lens group 30 ″ in the direction of the optical axis L2, and holds the lenses G6 and G7. At the same time, it is fixed to the holding portion 13 ′ of the unit case 10 so as not to move in the direction of the optical axis L 2.
The filter 40 is an infrared cut filter, a low-pass filter, or the like, and is disposed behind the fourth fixed lens group (image blur correction device M) in the optical axis L2 direction as shown in FIG. 14 is fixed. Note that the filter 40 may not be necessary depending on the image sensor and the imaging processing means.
As shown in FIG. 3, the CCD 50 is disposed behind the filter 40 in the direction of the optical axis L <b> 2 and is fixed to the holding portion 15 of the unit case 10.

  As shown in FIG. 2, the first drive unit 60 includes a guide shaft 61 and a detent shaft 62 fixed in the unit case 10 by extending in the direction of the optical axis L2, a lead screw 63 extending in the direction of the optical axis L2, a lead A motor 64 that rotationally drives the screw 63, a nut 65 that is screwed into the lead screw 63 and abuts against the U-shaped engaging portion 34, and a biasing force that constantly biases the U-shaped engaging portion 34 toward the nut 65. A tension-type coil spring 66 or the like that is hooked between the lens holding member 31 and the lens holding member 31 ″ is provided.

  As shown in FIG. 2, the second drive unit 70 extends in the direction of the optical axis L2 and is fixed to the unit case 10 (here, also serving as the guide shaft 61) and a non-rotating shaft (here, the rotation shaft). (The same as the stop shaft 62), a lead screw 73 extending in the direction of the optical axis L2, a motor 74 for rotationally driving the lead screw 73, and a nut 75 screwed into the lead screw 73 and abutted against the U-shaped engaging portion 34 ″. And a coil spring (here, also used as the coil spring 66) that exerts an urging force that constantly urges the U-shaped engaging portion 34 ″ toward the nut 75.

  The control unit 90 is, for example, a microcomputer or the like fixed to the outer wall of the unit case 10, and as shown in FIG. 4, a control unit 91 that performs arithmetic processing and processes various signals to generate a command signal, the first A motor drive circuit 92 for driving the motor 64 of the drive unit 60, a motor drive circuit 93 for driving the motor 74 of the second drive unit 70, a CCD drive circuit 94 for driving the CCD 50, and a first coil included in the image blur correction device M. 221 and a drive circuit 95 for driving the second coil 231; a position detection circuit 96 connected to the first magnetic sensor 271 and the second magnetic sensor 272 for detecting the position of the movable holding member 210 included in the image blur correction device M; An angular velocity detection circuit 97 connected to the angular velocity sensor 80 is provided.

  As shown in FIGS. 2 and 5 to 7, the image blur correction device M as the fourth fixed lens group includes a base 200, a movable holding member 210, and driving means (first coil 221, first driving magnet 222. The first driving mechanism 220, the second driving mechanism 230 (including the second coil 231 and the second driving magnet 232) as the driving means, and the movable holding member 210 are movable in a plane perpendicular to the optical axis L2. Four spheres 250 as support mechanisms to support, first return magnet 261 and second return magnet 262 as return means, and first magnetic sensor 271 and second magnetic sensor 272 as position detection means are electrically connected. A flexible wiring board 280 and the like are provided.

As shown in FIGS. 5 to 9, the base 200 is substantially flat in the optical axis L2 direction, narrow in the direction of the straight line S1 orthogonal to the optical axis L2 and parallel to the optical axis L1, and the optical axis L2 and the straight line S1. A substantially rectangular case-like base 201 that is long in the direction of a straight line S2 orthogonal to the cover, and a cover-like base 202 that is detachably coupled to the case-like base 201.
As shown in FIGS. 7 and 9, the case-like base 201 has a lens G7 (the outer diameter is R3, the dimension from the center in the straight line S1 direction is h3, and the dimension from the center in the straight line S2 direction is as shown in FIG. W3, an opening 201a for fitting and fixing a lens having a shape satisfying R3>w3> h3, and a recess 201b formed around the opening 201a (as shown in FIG. 9, the inner diameter is R4 When the dimension from the center in the direction of the straight line S1 is h4 and the dimension from the center in the direction of the straight line S2 is w4, the concave portion having a shape satisfying R4>w4> h4), the first coil 221 is fitted and fixed 2 Two fitting recesses 201c, two fitting recesses 201d for fitting and fixing the first return magnet 261, a fitting recess 201e for fitting and fixing the second coil 231 and the second return magnet 262 are fitted. Hard Fitting recess 201f, through hole 201g into which guide shaft 61 is inserted and positioned, through hole 201h into which rotation prevention shaft 62 is inserted and positioned, four recesses 201i for receiving spherical body 250 as a support mechanism, movable holding A substantially rectangular outer peripheral wall 201j formed so as to surround the member 210, a positioning pin 201k and a screw hole 201m formed on an end surface of the outer peripheral wall 201j for positioning and coupling the cover-like base 202, a unit case The projection 201p etc. which are fitted to 10 holding parts 13 'are provided.

As shown in FIGS. 7 and 9, the opening 201a has a center C1 (coincident with the center L2 of the lens G7) at the intersection of the straight line S1 and the straight line S2, and is opposed to the straight line S2 in the direction of the straight line S1. It is formed narrow in the direction of the straight line S1 so as to define parallel inner wall surfaces.
The recess 201b is formed to have an inner diameter dimension that allows the holding portion 210a of the movable holding member 210 to move in a non-contact manner within a range in which the movable holding member 210 is driven.
The two fitting recesses 201c are formed at positions symmetrical with respect to the straight line S1, and the two fitting recesses 201d are positions symmetrical with respect to the straight line S1 and corresponding to the two fitting recesses 201c, respectively. Is formed.
The four concave portions 201i are formed so as to be movably received in a state where the spherical body 250 is partially protruded in the direction of the optical axis L2. As shown in FIG. 9, the four concave portions 201i are arranged such that two concave portions 201i are disposed on one side and two concave portions 201i are disposed on the other side across the opening 201a and the concave portion 201b in the direction of the straight line S2. Is arranged. That is, the two concave portions 201 i on one side correspond to the extension portion 211 on one side of the movable holding member 210, and the two concave portions 201 i on the other side correspond to the extension portion 211 on the other side of the movable holding member 210. Are arranged to be.

  As shown in FIGS. 5 to 7, the cover-like base 202 is formed in two parts so as to expose the holding portion 210 a of the movable holding member 210, and the first magnetic sensor 271 is fitted and fixed. Two fitting holes 202a, a fitting hole 202b for fitting and fixing the second magnetic sensor 272, a through hole 202c into which the guide shaft 61 is inserted and positioned, and a rotation preventing shaft 62 are inserted and positioned. 202d through which the positioning pin 201k is fitted, a circular hole 202f through which the screw B is passed, and the like.

That is, in a state where the cover-like base 202 is coupled to the case-like base 201, the two fitting hole portions 202a are in positions symmetrical with respect to the straight line S1 and at positions respectively corresponding to the two fitting concave portions 201c. One fitting recess 202b is formed at a position corresponding to one fitting recess 201e.
The base 200 accommodates the spherical body 250 and the movable holding member 210 in the case-like base 201 and connects the cover-like base 202 from above to restrict the movable holding member 210 from separating in the direction of the optical axis L2. At the same time, the movable holding member 210 is movably held in a plane perpendicular to the optical axis L2.
Therefore, after the spherical body 250 and the movable holding member 210 are accommodated in the case-like base 201 and the cover-like base 202 is assembled, they can be handled as a module product integrally.

  As shown in FIGS. 6 to 8, 10 and 11, the movable holding member 210 is substantially flat except for a part in the direction of the optical axis L2, narrow in the direction of the straight line S1, and in the direction of the straight line S2. A cylindrical holding part 210a that holds the lens G6, two extending parts 211 that extend to both sides in the direction of the straight line S2 across the holding part 210a, the first Two fitting holes 212 for fitting and fixing the driving magnet 222, fitting holes 213 for fitting and fixing the second driving magnet 232, and four contact surfaces that contact the four spheres 250 as the support mechanism 214 and the like.

Inside the holding portion 210a, a lens G6 having a parallel cut surface obtained by partially cutting the outer periphery in the direction of the straight line S1 (cut so as to be parallel to the straight line S2) (as shown in FIG. 8, the outer diameter). A flat cylindrical shape (shown in FIG. 8) that is narrow in the direction of the straight line S1 so as to hold a lens having a shape satisfying R1> h1, where h1 is a dimension from the center of R1 and the straight line S1 direction. In this way, when the outer diameter is R2 and the dimension from the center in the direction of the straight line S1 is h2, the light of the lens G6 is formed at the intersection of the straight line S1 and the straight line S2. It is formed so as to position the axis L2.
The two fitting holes 212 are formed at positions symmetrical with respect to the straight line S1 and at positions corresponding to the two fitting recesses 201c, respectively, and one fitting hole 213 corresponds to one fitting recess 201e. It is formed in the position to do.
As shown in FIG. 11, the four contact surfaces 214 are in a resting state (a state where the optical axis L2 of the lens G6 coincides with the center C1 of the opening 201a of the base 200 (the optical axis L2 of the lens G7)). ), The movable holding member 210 is two-dimensionally arranged in a plane (a plane including the straight lines S1 and S2) perpendicular to the optical axis L2, which is disposed so as to face the four concave portions 201i (spheres 250) in the optical axis L2 direction. In the range of moving to, it is formed in a planar shape having a predetermined area so as not to deviate from the state of contact with the sphere 250 inserted in the corresponding recess 201 i of the case-like base 201.
That is, the two contact surfaces 214 provided on the one-side extension portion 211 correspond to the two concave portions 201i provided on one side of the case-like base 201, and are provided on the other-side extension portion 211. The two contact surfaces 214 are arranged so as to correspond to the two concave portions 201 i provided on the other side of the case-like base 201.

Here, the support mechanism includes four recesses 201 i provided in the case-like base 201, four spheres 250 disposed in the four recesses 201 i, and four abutments provided on the movable holding member 210 and abutting on the spheres 250. The surface 214 is configured.
In particular, when the distance between the centers of the two spheres 250 in the direction of the straight line S1 is H1 and the distance to the outermost end is H2 (H2> H1), in relation to the outer diameter R2 of the holding portion 210a,
2.R2> H1 (1)
2.R2> H2 (2)
The spherical body 250 is arranged so as to satisfy at least the expression (1).
Therefore, simplification of the structure, thinning in the direction of the optical axis L2, and narrowing in the direction of the straight line S1 can be achieved, and downsizing of the entire apparatus can be achieved.
In addition, the four spheres 250 (and the recesses 201i) are arranged such that the two spheres 250 (and the recesses 201i and the contact surfaces 214) are in contact with the extension portions 211 on one side of the holding portion 210a of the movable holding member 210. Since the other two spheres 250 (and the recesses 201i) face the surface 214) and face the other extension part 211 (the contact surface 214), the movable holding member 210 is It can be supported evenly in the longitudinal direction (straight line S2 direction), and therefore, the movable holding member 210 can be driven smoothly and with high accuracy to be positioned at a desired position.

The first driving mechanism 220 drives the movable holding member 210 in a straight line S1 direction (first direction) that is perpendicular to the longitudinal direction (the straight line S2 direction) in a flat surface (a plane including the straight line S1 and the straight line S2). Yes, as shown in FIGS. 6, 7, and 8, it is formed as a voice coil motor including a first coil 221 and a first drive magnet 222.
As shown in FIGS. 7 to 9, the first coil 221 is formed so as to form an oval or a substantially elliptical ring having a long axis in the direction of the straight line S2 when viewed from the direction of the optical axis L2. The two fitting recesses 201c of 201 are respectively fitted and fixed. That is, the first coil 221 includes two coils arranged symmetrically with respect to the straight line S1.
As shown in FIGS. 7 to 9, the first drive magnet 222 is a rectangular shape magnetized to two poles in the direction of the optical axis L2 and magnetized to two poles in the direction of the straight line S1, and is magnetized to four poles as a whole. And are fitted and fixed to the two fitting holes 212 of the movable holding member 210, respectively. That is, the first drive magnet 222 is configured by two drive magnets that are arranged symmetrically with respect to the straight line S1 and that are arranged to face the first coil 221 (two coils) in the direction of the optical axis L2. Has been.

  The first drive mechanism 220 generates electromagnetic drive force in the first direction, that is, the direction of the straight line S1, by turning on / off the current to the first coil 221 in forward and reverse directions. Thus, the first drive mechanism 220 for driving the movable holding member 210 in the first direction (straight line S1 direction) perpendicular to the longitudinal direction (straight line S2 direction) is the longitudinal direction of the movable holding member 210 (straight line S2 direction). Since the two drive magnets 222 disposed on both sides of the two and the two coils 221 corresponding to the two drive magnets 222 are formed on both sides in the longitudinal direction of the movable holding member 210 when the driving force is generated in the first direction. A driving force is generated and rotation moment that causes the movable holding member 210 to rotate can be prevented, and the movable holding member 210 can be driven with high accuracy with a simple configuration.

The second drive mechanism 230 drives the movable holding member 210 in a plane (a plane including the straight line S1 and the straight line S2) and in its longitudinal direction (the straight line S2 direction, the second direction). As shown in FIG. 8, the voice coil motor includes a second coil 231 and a second drive magnet 232.
As shown in FIGS. 7 to 9, the second coil 231 is formed so as to form an oval or a substantially elliptical ring having a long axis in the direction of the straight line S1 when viewed from the direction of the optical axis L2. 201 is fitted and fixed in one fitting recess 201e. That is, the second coil 231 is configured by one coil arranged closer to the straight line S1 (opening 201a) than the first coil 221 arranged on the same side.
As shown in FIGS. 7 to 9, the second drive magnet 232 is a rectangular shape magnetized to two poles in the direction of the optical axis L2 and magnetized to two poles in the direction of the straight line S2, and is magnetized to four poles as a whole. And is fitted and fixed in one fitting hole 213 of the movable holding member 210. That is, the second drive magnet 232 is disposed closer to the straight line S1 (holding portion 210a) than the first drive magnet 222 disposed on the same side, and is disposed so as to face the second coil 231 in the optical axis L2 direction. It is comprised by the one drive magnet made.

  The second drive mechanism 230 generates electromagnetic driving force in the second direction, that is, in the direction of the straight line S2, by turning on / off the current to the second coil 231 in the forward and reverse directions. As described above, since the second drive mechanism 230 drives the movable holding member 210 in the longitudinal direction (the direction of the straight line S2), even the single coil 231 and the single drive magnet 232 generate a rotational moment. A desired linear driving force can be obtained without occurring.

As shown in FIGS. 7 and 9, the first return magnet 261 is formed in a rectangular shape magnetized with two poles in the direction of the straight line S <b> 1, and is fitted into the two fitting recesses 201 d of the case-like base 201. Has been fixed. In other words, the first return magnet 261 is arranged in line symmetry with respect to the straight line S1, and two return magnets are arranged so as to face the first drive magnet 222 (two drive magnets) in the optical axis L2 direction, respectively. It is comprised by.
As shown in FIGS. 7 and 9, the second return magnet 262 is formed in a rectangular shape magnetized with two poles in the direction of the straight line S <b> 2, and is fitted into one fitting recess 201 f of the case-like base 201. Is fixed. That is, the second return magnet 262 is disposed closer to the straight line S1 (opening 201a) than the first return magnet 261 disposed on the same side, and faces the second drive magnet 232 in the optical axis L2 direction. It is comprised by the one return magnet arrange | positioned.

The first return magnet 261 faces the first drive magnet 222 to form a magnetic path and exerts a magnetic action, and the second return magnet 262 faces the second drive magnet 232 to form a magnetic path. The movable holding member 210 is moved to a predetermined rest position (the optical axis L2 of the lens G6 is the base 200 (case-like base 201) in a rest state in which the first coil 221 and the second coil 231 are not energized. Is returned to the optical axis L2 of the lens G7 fixed to (a position coincident with the center C1 of the opening 201a) and a stable holding force is generated.
As described above, in the resting state, the movable holding is performed by the magnetic attraction between the first return magnet 261 and the second return magnet 262 of the return means and the first drive magnet 222 and the second drive magnet 232 of the drive means. The member 210 is automatically returned (centered) to a predetermined rest position and stably held.
Therefore, drive control such as initialization is not required during driving, and rattling of the movable holding member 210 can be prevented in a resting state. Further, since the first drive magnet 222 and the second drive magnet 232 of the drive means are also used to interact with the first return magnet 261 and the second return magnet 262 of the return means, the structure is simplified and the apparatus is downsized. Etc. can be achieved.

The first magnetic sensor 271 is, for example, a Hall element that detects a change in magnetic flux density and outputs it as an electrical signal. As shown in FIGS. 6 and 7, the first magnetic sensor 271 has two fitting holes 202 a in the cover-like base 202. Each is fitted and fixed. That is, the first magnetic sensor 271 is arranged in two lines symmetrical with respect to the straight line S1 and two magnetic sensors arranged to face the first drive magnet 222 (two drive magnets) in the optical axis L2 direction. It is comprised by.
The first magnetic sensor 271 forms a magnetic circuit with the first drive magnet 222 fixed to the movable holding member 210, and is generated when the movable holding member 210 moves relative to the base 200. The position of the movable holding member 210 is detected by detecting a change in magnetic flux density.
In addition, although the case where the two magnetic sensors respectively opposed to the two drive magnets 222 are employed as the first magnetic sensor 271 is shown here, for example, the second drive magnet 232 is arranged with respect to the straight line S1. One magnetic sensor facing the drive magnet 222 arranged on the opposite side to the side may be employed.

The second magnetic sensor 272 is, for example, a Hall element that detects a change in magnetic flux density and outputs it as an electrical signal. As shown in FIGS. 6 and 7, the second magnetic sensor 272 is inserted into one fitting hole 202 b of the cover-like base 202. It is fitted and fixed. That is, the second magnetic sensor 272 is disposed closer to the straight line S1 than the first magnetic sensor 271 disposed on the same side and is disposed so as to face the second drive magnet 232 in the optical axis L2 direction. It is constituted by a magnetic sensor.
The second magnetic sensor 272 forms a magnetic circuit with the second drive magnet 232 fixed to the movable holding member 210, and is generated when the movable holding member 210 moves relative to the base 200. The position of the movable holding member 210 is detected by detecting a change in magnetic flux density.

  Thus, since the first magnetic sensor 271 and the second magnetic sensor 272 are fixed to the base 200 (the cover-like base 202), wiring is easier than in the case of being provided on the movable holding member 210, and movement is possible. The disconnection etc. which accompany it can be prevented, and since the 1st drive magnet 222 and the 2nd drive magnet 232 are combined for position detection, the structure is simplified compared with the case where a dedicated magnet is provided. Reduction of the number of parts, downsizing of the apparatus, etc. can be achieved.

As shown in FIGS. 5 to 7, the flexible wiring board 280 includes a connection portion 281 connected to the first coil 221 of the first drive mechanism 220 and a connection portion connected to the second coil 231 of the second drive mechanism 230. 282, a connection portion 283 connected to the first magnetic sensor 271 and a connection portion 284 connected to the second magnetic sensor 272.
The flexible wiring board 280 includes the spherical body 250 and the movable holding member 210 incorporated in the case-like base 201, and the cover-like base 202 is attached to the flexible wiring board 280. It is attached so as to contact the front surface of 202 and is electrically connected.
As described above, the flexible wiring board 280 is fixed to the base 200 (the case-like base 201 and the cover-like base 202) that does not move in either the optical axis L2 direction or the plane direction perpendicular to the optical axis L2. It is not necessary to move in the plane direction perpendicular to the axis L2 direction and the optical axis L2, and the flexible wiring board 280 does not need to be bent. Therefore, the arrangement space of the flexible wiring board 280 can be narrowed, and therefore the apparatus can be miniaturized and the durability can be improved.

When assembling the image blur correction device M, the case-like base 201 in which the coils 221 and 231 and the return magnets 261 and 262 are incorporated, the cover-like base 202 in which the magnetic sensors 271 and 272 are incorporated, the spherical body 250, and the drive magnet A movable holding member 210 in which 222 and 232 are incorporated is prepared.
Then, the spherical body 250 is inserted into the recess 201 i of the case-shaped base 201, and then the movable holding member 210 is accommodated in the case-shaped base 201 so that the contact surface 214 is in contact with the spherical body 250. At this time, the first return magnet 261 and the second return magnet 262 fixed to the case-like base 201 and the first drive magnet 222 and the second drive magnet 232 fixed to the movable holding member 210 are magnetically attracted, respectively. Even without using a spring that exerts an urging force as in the prior art, the movable holding member 210 is supported so as to be movable in a plane perpendicular to the optical axis L2 without being separated from the case-like base 201, and is automatically rested. Centered.
Subsequently, the cover-like base 202 is covered so as to cover the extending portion 211 of the movable holding member 210 and is coupled to the case-like base 201 using the screws B.
Finally, the flexible wiring board 280 is attached so as to face the back surface of the case-like base 201 and the front surface of the cover-like base 202.

In this way, the spherical body 250 is fitted into the concave portion 201i of the case-like base 201, and the movable holding member 210 is fitted into the case-like base 201 so that the contact surface 214 is brought into contact with the spherical body 250 from above. By attaching the cover-like base 202, the assembling work of the apparatus M can be easily performed by a simple procedure, and the apparatus M can be thinned in the direction of the optical axis L2, and further perpendicular to the optical axis L2. The width and size of the apparatus can be reduced in the direction perpendicular to the longitudinal direction of the movable holding member 210 (the direction of the straight line S2).
In addition to the magnetic attraction force of the return magnets 261 and 262 and the drive magnets 222 and 232, the cover-like base 202 is provided to support the movable holding member 210 movably with respect to the base 200. Even when an impact force or the like is applied from the outside, it is possible to reliably prevent the movable holding member 210 from being detached from the base 200 in the direction of the optical axis L2.

Next, the correction operation of the image blur correction apparatus M will be briefly described with reference to FIGS.
First, in a resting state in which the first coil 221 and the second coil 231 are not energized, the movable holding member 210 has a return means (first return magnet 261 and second return magnet 262) as shown in FIG. Due to the returning action, the optical axis L2 of the lens G6 is returned (centered) to a rest position where it coincides with the center C1 of the opening 201a of the base 200 (that is, the optical axis L2 of the lens G7).
When the movable holding member 210 (lens G6) is shifted upward as an example from the resting state shown in FIG. 12A, the first driving mechanism 220 is driven upward in the first direction (straight line S1 direction). Is generated. As a result, the movable holding member 210 is moved upward in the direction of the straight line S1, as shown in FIG.
In addition, when the movable holding member 210 (lens G6) is shifted downward as an example from the resting state shown in FIG. 12A, the first driving mechanism 220 is driven downward in the first direction (straight line S1 direction). Is generated. As a result, the movable holding member 210 is moved downward in the direction of the straight line S1, as shown in FIG.

  Thus, the first drive mechanism 220 that drives the movable holding member 210 in the first direction (the direction of the straight line S1) includes the two drive magnets 222 and the two drive magnets that are disposed on both sides of the movable holding member 210 in the longitudinal direction. The rotational moment is such that when the driving force is generated in the first direction, the driving force is generated on both sides in the longitudinal direction of the movable holding member 210 to rotate the movable holding member 210. Can be prevented, and the movable holding member 210 can be driven with high accuracy with a simple configuration.

Subsequently, as shown in FIG. 13A, the movable holding member 210 causes the optical axis L <b> 2 of the lens G <b> 6 of the base 200 by the return action of the return means (the first return magnet 261 and the second return magnet 262). In the case where the movable holding member 210 (lens G6) is shifted to the right side as an example from the resting state in which the center C1 of the opening 201a (that is, the optical axis L2 of the lens G7) coincides with the resting position, the second drive mechanism 230 generates a driving force to the right in the second direction (straight line S2 direction). Thereby, the movable holding member 210 is moved rightward in the direction of the straight line S2, as shown in FIG.
When the movable holding member 210 (lens G6) is shifted to the left as an example from the resting state shown in FIG. 13A, the second driving mechanism 230 is driven to the left in the second direction (straight line S2 direction). Is generated. Thereby, the movable holding member 210 is moved leftward in the direction of the straight line S2, as shown in FIG.

  As described above, the movable holding member 210 is movably supported by the support mechanism (four spheres 250), and the first drive magnet 222 and the second drive are energized by energizing the first coil 221 and the second coil 231. The electromagnetic driving force generated in cooperation with the magnet 232 can be two-dimensionally moved in a plane perpendicular to the optical axis L2 with respect to the base 200, and image blur due to camera shake or the like can be corrected with high accuracy.

FIG. 14 shows another embodiment of the image blur correction device according to the present invention. The above-described embodiment is the same as the support mechanism except that the spherical body 250, the concave portion 201i, and the contact surface 214 are changed to three. The form is the same. Accordingly, the same components are denoted by the same reference numerals and description thereof is omitted.
In this embodiment, as shown in FIG. 14, the case-like base 201 ′ has three recesses 201 i, and the movable holding member 210 ′ has three contact surfaces 214.
One concave portion 201i is arranged on the upper side on the straight line S1 passing through the center C1 of the opening 201a, and the other two concave portions 201i are arranged on the lower side at positions symmetrical with respect to the straight line S1. ing.
In addition, one abutting surface 214 is disposed at a position corresponding to the recess 201i located on the straight line S1, and the other two abutting surfaces 214 are two symmetrically positioned with respect to the straight line S1. It arrange | positions in the position corresponding to the recessed part 201i.
That is, two spheres 250 of the three spheres 250 are arranged in regions facing the extension part 211 on one side and the extension part 211 on the other side across the holding part 210a of the movable holding member 210 ′. Two of the three recesses 201 i are arranged at positions corresponding to the two spheres 250 corresponding to the respective extension portions 211, and two of the three contact surfaces 214. Are arranged at positions corresponding to the two spheres 250 corresponding to the respective extending portions 214.
According to this configuration, the movable holding member 210 ′ corresponds to one sphere 250 arranged on the straight line S 1, the one extension part 211 and the other extension part 211 across the holding part 210 a. Since it is supported by the two spheres 250, the movable holding member 210 ′ can be evenly supported without deviation in the longitudinal direction while further simplifying the structure. Therefore, the movable holding member 210 ′ can be smoothly and highly supported. It can be accurately driven and positioned at a desired position.

FIG. 15 shows still another embodiment of the image blur correction device according to the present invention. In the support mechanism, the spherical body 250, the concave portion 201i, and the contact surface 214 are changed to three, and further shown in FIG. It is the same as that of the above-mentioned embodiment except having changed the arrangement position of the spherical body 250 compared with embodiment. Accordingly, the same components are denoted by the same reference numerals and description thereof is omitted.
In this embodiment, as shown in FIG. 15, the case-shaped base 201 ″ has three recesses 201 i, and the movable holding member 210 ″ has three contact surfaces 214.
One concave portion 201i is disposed on the left extending portion 211 with respect to the straight line S1, and the other two concave portions 201i are disposed on the right extending portion 211 with respect to the straight line S1.
One abutting surface 214 is disposed at a position corresponding to the concave portion 201i located on the left side with respect to the straight line S1, and the other two abutting surfaces 214 are arranged on the right side with respect to the straight line S1. It arrange | positions in the position corresponding to the recessed part 201i.
Here, the right extension part 211 that holds only the first drive magnet 222 is supported by one sphere 250, and the left extension part 211 that holds the first drive magnet 222 and the second drive magnet 232 is divided into two parts. It is supported by a sphere 250.
That is, two spheres 250 of the three spheres 250 are disposed in regions facing the extension part 211 on one side and the extension part 211 on the other side across the holding part 210a of the movable holding member 210 ''. Two of the three recesses 201i are arranged at positions corresponding to the two spheres 250 corresponding to each of the extending portions 211, and two of the three contact surfaces 214 are in contact with each other. 214 is arranged at a position corresponding to the two spheres 250 corresponding to each extending portion 214.

  According to this configuration, the movable holding member 210 ″ has one spherical body 250 corresponding to the extending portion 211 on one side (holding one drive magnet 222) across the holding portion 210 a and the other side (2 Since it is supported by the two spheres 250 facing the extending portion 211 (holding the two drive magnets 222, 232), the movable holding member 210 ″ is more evenly distributed in the longitudinal direction while simplifying the structure. Therefore, the movable holding member 210 '' can be driven smoothly and with high accuracy to be positioned at a desired position.

In the above embodiment, the first coil 221 and the second coil 231 are oval or substantially elliptical, but the present invention is not limited to this and may be a substantially rectangular ring.
In the above-described embodiment, the first magnetic sensor 271 and the second magnetic sensor 272 made of Hall elements are shown as the position detection means, but the present invention is not limited to this, and other magnetic sensors may be adopted. .

In the above embodiment, as a support mechanism for supporting the movable holding member, the base 200 (case-like base 201, 201 ′, 201 ″) is provided with the concave portion 201i in which the sphere 250 is disposed, and the sphere 250 is brought into contact. Although the case where the surface 214 is provided on the movable holding members 210, 210 ′, 210 ″ has been shown, the present invention is not limited to this, and conversely, the concave portion is provided on the movable holding member and the contact surface is provided on the base. A configuration may be adopted. In addition, as the plurality of concave portions, the plurality of spheres, and the plurality of contact surfaces, three or four concave portions 201i, three or four spheres 250, three or four contact surfaces 214 are shown, but the present invention is not limited thereto. Instead of this, five or more recesses, spheres, and contact surfaces may be employed.
In the above embodiment, the coils 221 and 231 and the return magnets 261 and 262 are fixed to the base 200 (the case-like bases 201, 201 ′, 201 ″, the cover-like base 202), and the movable holding members 210, 210 ′, 210 are fixed. The case where the drive magnets 222 and 232 are fixed to ″ is shown, but the present invention is not limited to this. Conversely, the drive magnet is fixed to the base, and the coil and the return magnet are fixed to the movable holding member. A configuration may be adopted.

In the above embodiment, the image shake correction apparatus applied to the camera unit U (imaging unit) mounted on the portable information terminal has been described. However, the image blur correction apparatus includes a plurality of imaging lenses, an imaging element, and a housing. The imaging unit may include a configuration including the image blur correction device having the above configuration.
According to this, in the configuration in which a plurality of imaging lenses are arranged in the optical axis direction, the correction lens held by the movable holding member is appropriately driven by including the above-described image shake correction device, Image blur due to camera shake or the like can be corrected smoothly and with high accuracy. That is, it is possible to provide an imaging unit to which the image blur correction function is added in addition to a plurality of imaging lenses.

  As described above, the image shake correction apparatus of the present invention has a simplified structure, a smaller and thinner apparatus in the optical axis direction of the lens and a direction perpendicular to the optical axis direction, and simplified and easy assembly work. Mobile phone that is required to be downsized and thinned because image blur can be corrected with high accuracy by camera shake or the like, and the return operation can be automatically performed in a resting state. It can be applied to a camera unit mounted on a portable information terminal such as a portable music player, as well as an ordinary digital camera or other portable optical device, and a personal computer incorporating the same. It is also useful in such cases.

L1, L2 Optical axis PH Portable information terminal PH1 Housing PH2 Display portion PH3 Operation button PH4 Shooting window U Camera unit 10 Unit case (housing)
11 Projection part 12, 13, 13 ', 14, 15 Holding part 20 Prism G1, G2, G3, G4, G5, G6, G7 Lens 30 First movable lens group 31 Lens holding member 32 Guided part 33 Restricted part 34 U-shaped engaging portion 30 ′ second fixed lens group 30 ″ third movable lens group 31 ″ lens holding member 32 ″ guided portion 33 ″ regulated portion 34 ″ U-shaped engaging portion 40 filter 50 CCD
60 First drive unit 61 Guide shaft 62 Non-rotating shaft 63 Lead screw 64 Motor 65 Nut 66 Coil spring 70 Second drive unit 73 Lead screw 74 Motor 75 Nut 80 Angular velocity sensor 90 Control unit 91 Control units 92 and 93 Motor drive circuit 94 CCD drive circuit 95 drive circuit 96 position detection circuit 97 angular velocity detection circuit M image blur correction device B screw S1 straight line (first direction)
S2 straight line (second direction)
200 Base 201, 201 ′, 201 ″ Case-like base 201a Opening 201b Recess 201c, 201d, 201e, 201f Fitting recess 201g, 201h Through hole 201i Recess (support mechanism)
201j Outer peripheral wall 201k Positioning pin 201m Screw hole 201p Protrusion 202 Cover-like base 202a, 202b Fitting hole 202c, 202d Through hole 202e Fitting hole (or notch)
202f Circular hole 210,210 ', 210''Movable holding member 210a Holding part 211 Extension part 212,213 Fitting hole 214 Contact surface (support mechanism)
220 First drive mechanism (drive means)
221 First coil 222 First drive magnet 230 Second drive mechanism (drive means)
231 Second coil 232 Second drive magnet 250 Sphere (support mechanism)
261 First return magnet (return means)
262 Second return magnet (return means)
271 First magnetic sensor (position detecting means)
272 Second magnetic sensor (position detecting means)
280 Flexible wiring board 281,282,283,284 Connection part

Claims (5)

A base having an opening, a movable holding member for holding the lens, a support mechanism for supporting the movable holding member in a plane perpendicular to the optical axis of the lens, and driving the movable holding member in the plane An image blur correction apparatus comprising: a driving unit that performs position detection; a position detection unit that detects a position of the movable holding member; and a return unit that returns the movable holding member to a predetermined pause position in a pause state,
The drive means includes a coil fixed to one of the base and the movable holding member, and a drive magnet fixed to the other of the base and the movable holding member at a position facing the coil.
The return means includes a return magnet fixed to one of the base and the movable holding member so as to generate a magnetic force for returning to the rest position opposite to the drive magnet,
The position detection means includes a magnetic sensor fixed to one of the base and the movable holding member at a position facing the drive magnet,
The support mechanism includes at least three concave portions provided on one of the base and the movable holding member, at least three spheres arranged so as to be able to roll while projecting into the at least three concave portions, the base and the movable Including at least three contact surfaces provided on the other of the holding members and contacting the at least three spheres,
An image blur correction apparatus characterized by that. The movable holding member includes a holding part for fitting and holding a lens whose outer periphery is partially cut, two extending parts extending on both sides across the holding part, and the at least three contact surfaces And
The base surrounds the opening formed in a region facing the holding portion, the at least three recesses formed in a region facing the at least three contact surfaces, and the movable holding member. A case-like base defining an outer peripheral wall formed on the case-like base, and the case-like base for restricting the movable holding member from separating in the optical axis direction in a state where the spherical body and the movable holding member are accommodated in the case-like base A cover-like base removably coupled to
The image blur correction apparatus according to claim 1, wherein: The drive means includes a first drive mechanism that drives in a first direction in the plane and a second drive mechanism that drives in a second direction in the plane,
The coil includes a first coil included in the first drive mechanism and a second coil included in the second drive mechanism,
The drive magnet includes a first drive magnet that is included in the first drive mechanism and faces the first coil, and a second drive magnet that is included in the second drive mechanism and faces the second coil,
The return magnet includes a first return magnet that faces the first drive magnet and a second return magnet that faces the second drive magnet,
The magnetic sensor includes a first magnetic sensor facing the first driving magnet, and a second magnetic sensor facing the second driving magnet,
The first drive mechanism drives the movable holding member in the plane and in a direction perpendicular to the longitudinal direction thereof,
The first drive magnet is composed of two drive magnets respectively disposed on the two extending portions across the holding portion in the movable holding member,
The first coil is composed of two coils arranged to face the two drive magnets of the first drive magnet in the case-like base,
The first return magnet is composed of two return magnets arranged to face the two drive magnets of the first drive magnet in the case-shaped base,
The first magnetic sensor includes at least one magnetic sensor disposed on the cover-like base so as to face at least one of the two drive magnets of the first drive magnet.
The image blur correction apparatus according to claim 1, wherein the image blur correction apparatus is an image blur correction apparatus. Of the at least three spheres, at least two spheres are arranged in regions facing the extension part on one side and the extension part on the other side across the holding part of the movable holding member, respectively.
At least two of the at least three recesses are disposed at positions corresponding to the at least two spheres;
At least two of the at least three contact surfaces are disposed at positions corresponding to the at least two spheres,
The image blur correction apparatus according to claim 3. The image blur correction device according to claim 1, a plurality of imaging lenses, an imaging device, and a housing.
An imaging unit characterized by that.

Images