JP2007101634A - Lens drive device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent backlash of a lens frame, and image blur etc. in a lens drive device. <P>SOLUTION: The lens drive device includes: a base 10; a drive source 50 fixed to the base 10; a lead screw 60 rotated by the drive source 50; the lens frame 40 for holding a lens G; shafts 20 and 30 fixed to the base 10 and supporting the lens frame 40 such that the lens frame 40 is freely moved in an optical axis direction L; a nut 70 which is engaged with the lead screw 60 and abutted on the lens frame 40 in the optical axis direction L so as not to be rotatable; and an energizing member 80 pressing the nut 70 toward the lens frame 40. The energizing member 80 is formed so that the lens frame 40 is rotated and pressed within a plane perpendicular to the optical axis L. Thus, backlash of the lens frame 40, image blur, and so on are prevented. In addition, since the energizing member 80 has both the function of pressing the nut against the lens frame and the function of pressing the lens frame so that the lens frame rotates, the number of components can be reduced so as to attain the simplified configuration, the miniaturized device, and so on. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lens driving device that drives a lens frame holding a lens by a screwed structure of a lead screw and a nut in an optical axis direction.

  Conventional lens driving devices include a base (or case), a lens frame that holds a lens, a guide shaft that is fixed to the base to guide the lens frame in the optical axis direction and is fitted to a fitting portion of the lens frame. (Or a non-rotating shaft), a motor fixed to the base, a lead screw that is directly connected to the motor and driven to rotate, a nut that holds the lens frame in a non-rotatable manner and is screwed into the lead screw, and a nut There is a known one that includes a coil spring or the like that biases the lens frame, and rotates the lead screw by a motor and screw-feeds the nut to move the lens frame in the optical axis direction (for example, Patent Document 1). , See Patent Document 2).

However, in the above-described conventional apparatus, a manufacturing play (a minute clearance) occurs between the fitting portion of the lens frame and the guide shaft (non-rotating shaft), particularly around the optical axis along which the lens frame moves. In this case, the lens frame is decentered, the lens frame is decentered, or the image is shaken. In addition, the coil spring that urges the nut to the lens frame exerts an urging force on the position deviated from the center (optical axis) of the lens frame (lens), so that the lens frame (lens) is tilted by the backlash. The lens frame was decentered, the image was shaken, the image was blurred, and the image was distorted.
Therefore, when this lens driving device is applied as an optical pickup unit for CD or DVD, if the lens frame is moved in the optical axis direction during reading or writing of data, the optical axis of the lens fluctuates, and the focus on the disc It was difficult to keep the constant.

Japanese Patent Laid-Open No. 10-020177 JP 2004-004903 A

  The present invention has been made in view of the above circumstances, and its object is to simplify the structure, reduce the number of parts, reduce the size of the apparatus, and the like, while moving the lens frame. It is an object of the present invention to provide a lens driving device that can stably and accurately drive a lens frame (lens) in the optical axis direction by preventing such rattling, decentering, tilting, and image shaking.

The lens driving device of the present invention includes a base, a driving source fixed to the base, a lead screw that is rotationally driven by the driving source, a lens frame that holds the lens, and a lens frame that is fixed to the base so that the lens frame can move in the optical axis direction. A lens driving device comprising: a shaft to be supported; a nut that is screwed into a lead screw and is non-rotatably abutted on the lens frame in the optical axis direction; and a biasing member that biases the nut toward the lens frame, The urging member is characterized by being configured to urge the lens frame to rotate in a plane perpendicular to the optical axis.
According to this configuration, when the lead screw is rotated by the rotational driving force of the driving source, the nut is screwed in the optical axis direction while restricting the rotation, and the lens frame follows the nut by the urging force of the urging member, and the light is transmitted. Move in the axial direction.
Here, the biasing member that biases the nut toward the lens frame is formed so as to rotate and bias the lens frame in a plane perpendicular to the optical axis. The frame moves stably in the optical axis direction. Thereby, when this lens driving device is mounted on an optical pickup unit or the like, the optical axis does not fluctuate even during lens driving, and the focus can be kept constant. In addition, since the urging member serves both to urge the nut to the lens frame and to rotate and urge the lens frame, the number of parts can be reduced as compared with the case where separate urging members are provided. Simplification and downsizing of the apparatus can be achieved.

In the above configuration, the biasing member may be configured by a coil spring attached in a state twisted by a predetermined angle.
According to this configuration, since the compression or tension type coil spring is attached in a state of being twisted by a predetermined angle, the original biasing force in the axial direction of the coil spring acts as a biasing force that biases the nut toward the lens frame. The urging force due to torsion acts as an urging force that urges the lens frame to rotate. As described above, the structure can be simplified while achieving a reduction in cost by making an ordinary coil spring have two roles.

In the above configuration, the shaft includes a guide shaft that is arranged in parallel in the vicinity of the lead screw and slidably guides the lens frame, and a non-rotating shaft that restricts rotation of the lens frame. It is possible to adopt a configuration that is arranged around and has one end hooked to the lens frame and the other end hooked to the base.
According to this configuration, the lens frame is guided mainly in the optical axis direction by the guide shaft, and the rotation in a plane perpendicular to the optical axis is restricted by the non-rotating shaft. Here, since the coil spring is arranged around the guide shaft located in the vicinity of the lead screw, it is possible to suppress the generation of a force to incline the lens frame as much as possible, and to assemble the coil spring. It can be done easily.

In the above configuration, the urging member includes a leaf spring that contacts the nut in the optical axis direction, and the nut urges a part of the urging force of the leaf spring in a direction perpendicular to the optical axis of the lens frame. It is possible to adopt a configuration that is formed to convert to
According to this configuration, the leaf spring urges the nut toward the lens frame, and also acts as an urging force for urging the lens frame through the engagement between the nut and the lens frame. In this manner, by making the single leaf spring serve two roles, the structure can be further simplified and the apparatus can be further reduced in size while achieving cost reduction.

In the above configuration, the shaft includes a guide shaft that is arranged in parallel in the vicinity of the lead screw and slidably guides the lens frame, and a detent shaft that restricts rotation of the lens frame, and the leaf spring is attached to the lens frame. It is possible to adopt a configuration in which a spring piece that is held and extends in a cantilever shape so as to come into contact with the guide shaft is integrally provided.
According to this configuration, the lens frame is guided mainly in the optical axis direction by the guide shaft, and the rotation in a plane perpendicular to the optical axis is restricted by the non-rotating shaft. Here, since the leaf spring is held by the lens frame and the spring piece extended in a cantilever shape is in contact with the guide shaft, the inclination of the lens frame with respect to the guide shaft can be prevented. Further, since the spring piece is integrally formed with the leaf spring, the assembly can be easily performed without increasing the number of parts.

  According to the lens driving device having the above configuration, the structure of the lens frame can be simplified, the number of parts can be reduced, the size of the device can be reduced, and the lens frame can be prevented from rattling, decentering, tilting, image shaking, etc. Thus, it is possible to obtain a lens driving device that can stably and accurately drive the lens frame (lens) in the optical axis direction.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the invention will be described with reference to the accompanying drawings.
1 to 4 show an embodiment of a lens driving device according to the present invention. FIG. 1 is an exploded perspective view of the device, FIG. 2 is a partial perspective view of the device, and FIG. 3 is a partial front view of the device. 4 is a partial plan view of the apparatus.

  As shown in FIGS. 1 to 4, this apparatus holds a base 10, a guide shaft 20 that is fixed to the base 10 and extends in the optical axis direction L, holds a rotation-preventing shaft 30, and a lens G. A lens frame 40 supported movably by L, a motor 50 as a drive source fixed to the base 10, a lead screw 60 directly connected to the motor 50 and extending in the optical axis direction L, and screwed to the lead screw 60 A nut 70 abutted on the lens frame 40, a coil spring 80 as a biasing member that biases the nut 70 toward the lens frame 40, a cover 90 coupled to the base 10 so as to cover the lens frame 40, and the lens frame The detection sensor 100 etc. which detect 40 initial positions are provided.

  As shown in FIGS. 1 to 4, the base 10 is formed of a resin material, has a substantially rectangular shape, and is closed to the opening 11 centered on the optical axis L and behind the optical axis L (motor side). A cylindrical hole 12 through which a coil spring 80 provided with a wall passes, a through hole 13 through which the lead screw 60 passes, a fitting hole 14 for fitting the guide shaft 20 formed in the closed wall of the hole 12, and a rotation preventing shaft 30 are provided. A fitting hole 15 for fitting, a fixing portion 16 for fixing the motor 50, a wall portion 17 for hooking one end (the other end) of the coil spring 80, a screw hole 18 for connecting the cover 90, and the like are provided. .

  As shown in FIGS. 1 to 4, the guide shaft 20 is formed by a metal material having a circular cross section so as to extend in the optical axis direction L, and one end thereof is fitted and fixed in the fitting hole 14 of the base 10. The other end is fitted and fixed in a fitting hole 92 of a cover 90 described later. The guide shaft 20 is slidably inserted into a connecting portion 43 described later of the lens frame 40 to guide the lens frame 40 in the optical axis direction L.

  The anti-rotation shaft 30 is formed so as to extend in the optical axis direction L by a metal material having a circular cross section as shown in FIGS. 1 to 4, and one end thereof is fitted in the fitting hole 15 of the base 10. The other end is fixedly fitted into a fitting hole 93 of a cover 90 described later. The rotation prevention shaft 30 is slidably inserted into a connecting portion 46 described later of the lens frame 40 to restrict the rotation of the lens frame 40 around the optical axis L.

  The lens frame 40 is formed of a resin material, and as shown in FIGS. 1 to 4, an annular portion 41 that holds the lens G, an extending portion 42 that extends radially from the annular portion 41, and an extending portion. 42 is formed so as to extend in the optical axis direction L from 42 and is connected to the guide shaft 20 by slidably fitting, and a circular hole formed in a part of the extended portion 42 through which the lead screw 60 passes. From the abutment part 44 that abuts the nut 70 in a non-rotatable manner, the latching groove 45 formed so as to latch one end 81 of the coil spring 80 on a part of the extension part 42, and the annular part 41. A substantially U-shaped connecting portion 46 that protrudes in the radial direction and connects the non-rotating shaft 30 slidably, a detection piece 47 that protrudes in the radial direction from the annular portion 41 and is detected by the detection sensor 100, and the like. I have.

  The motor 50 is a stepping motor that can be rotated step by step at a predetermined angle, and is fixed to the fixing portion 16 of the base 10 by screws B as shown in FIG. The motor 50 exerts a rotational driving force on the directly connected lead screw 60.

As shown in FIGS. 1 to 4, the lead screw 60 is formed by a metal material so as to extend in the optical axis direction L, and includes a male screw in a predetermined region on the outer peripheral surface thereof.
As shown in FIGS. 1 to 4, the nut 70 is formed of a metal material. The nut 70 is a female screw that engages with the male screw of the lead screw 60. A projection 70a or the like that can be inserted into the recess 44a is provided.

As shown in FIGS. 1 to 4, the coil spring 80 is disposed around the guide shaft 20 in a compressed state between the base 10 and the lens frame 40 and twisted by a predetermined angle. One end 81 is hooked on the hooking groove 45 of the lens frame 40, and the other end 82 is hooked on the side wall portion 17 in the hole 12 of the base 10.
Therefore, the coil spring 80 urges the lens frame 40 toward the front (object side) in the optical axis direction L, that is, the nut 70 screwed into the lead screw 60 is applied to the lens frame 40 (contact portion 44). By energizing the lens frame 40, the lens frame 40 (contact portion 44) and the nut 70 can always be brought into contact with each other, and the backlash between the female screw of the nut 70 and the male screw of the lead screw 60 is removed. Further, as shown in FIG. 3, the lens frame 40 is urged to rotate in the direction of arrow R around the guide shaft 20, that is, in a plane perpendicular to the optical axis L.

  As a result, rattling of the lens frame 40 is prevented, and the lens frame 40 is stably moved in the optical axis direction L. Therefore, the optical axis L does not fluctuate even during driving of the lens frame 40 (lens G), and the focus is increased. Can be kept constant. Further, since the coil spring 80 as the urging member has both a role of urging the nut 70 toward the lens frame 40 and a role of urging and urging the lens frame 40, compared to the case where separate urging members are provided. The number of parts can be reduced, the structure can be simplified, and the apparatus can be downsized.

  The cover 90 is formed of a resin material in a substantially rectangular shape, a substantially circular opening 91 in which the lens G ′ is fixed inside, a fitting hole 92 for fitting the other end of the guide shaft 20, and a detent A fitting hole 93 for fitting the other end of the shaft 30, a fitting hole 94 for the receiving member 94 a for receiving the tip of the lead screw 60, a circular hole 95 for passing the screw B, a recess 96 for attaching the detection sensor 100, and the like are provided. .

  The detection sensor 100 is a transmissive optical sensor having a light emitting element and a light receiving element, and detects the initial position (home position) of the lens frame 40 based on the presence or absence of the detected piece 47 of the lens frame 40. .

Next, the assembly of the apparatus will be described. First, the motor 50 to which the lead screw 60 is directly connected is fastened and fixed to the fixing portion 16 of the base 10 with the screw B, and the guide shaft 20 and the non-rotating shaft 30 are fixed to the base 10. The fitting holes 14 and 15 are respectively fitted and fixed.
Further, the detection sensor 100 is assembled and fixed in the recess 96 of the cover 90.

  Subsequently, the nut 70 is incorporated into the contact portion 44 of the lens frame 40 in a non-rotatable manner (the projection 70a is fitted into the recess 44a), and the coil spring 80 is twisted by a predetermined angle and arranged around the guide shaft 20, While inserting the guide shaft 20 and the detent shaft 30 into the connecting portions 43 and 46, the lens frame 40 is approached from the front, one end 81 of the coil spring 80 is latched in the latch groove 45, and the other end 82 is secured to the base 10. The lens frame 40 is hooked on the wall portion 17, screwed into the nut 70 and rotated, and the lens frame 40 is moved by a predetermined amount toward the rear in the optical axis direction L.

As a result, the coil spring 80 is compressed by a predetermined amount between the lens frame 40 and the base 10 and simultaneously exerts a biasing force that biases the nut 70 screwed into the lead screw 60 toward the lens frame 40. An urging force for urging the lens frame 40 to rotate in a plane perpendicular to the optical axis L is exerted.
Here, since the coil spring 80 is disposed around the guide shaft 20 positioned in the vicinity of the lead screw 60, the generation of a force to tilt the lens frame 40 can be suppressed as much as possible.

  Subsequently, in a state where the receiving member 94a is fitted in the fitting hole 94, the cover 90 is brought close to the base 10 so as to face the base member 10, and the leading end of the lead screw 60 is brought into contact with the receiving member 94a. The other ends of the guide shaft 20 and the non-rotating shaft 30 are fitted to 92 and 93, the cover 90 is joined to the base 10, and fastened with screws B. Thereby, the assembly of the apparatus is completed.

  Thus, in assembling the apparatus, it is possible to easily and reliably assemble by simply fitting the components sequentially from the front in the optical axis direction L. Therefore, assembly work can be performed easily and quickly, and productivity can be improved. In particular, the coil spring 80 exerts not only an original urging force for urging the nut 70 toward the lens frame 40 but also a urging force for rotating and urging the lens frame 40 to prevent rattling. Compared to the case of using a member, the number of parts can be reduced, the structure can be simplified, the assembly can be easily performed, and the cost can be reduced.

Next, the operation of this apparatus will be described.
First, when the lens frame 40 is positioned in front of the optical axis direction L (initial position), the detection sensor 100 detects the detected piece 47.
When the motor 50 rotates forward, the lead screw 60 rotates, and the nut 70 moves toward the rear in the optical axis direction L by a screw feeding action.
Then, against the urging force of the coil spring 80, the nut 70 and the lens frame 40 (contact portion 44) move rearward in the optical axis direction L while being in contact with each other.
Then, the number of steps from the start of the motor 50 is counted, the driving amount of the lens frame 40 is appropriately controlled, and the lens frame 40 is positioned at a desired position.

On the other hand, when the motor 50 rotates in the reverse direction, the lead screw 60 rotates, and the nut 70 moves toward the front in the optical axis direction L by the screw feeding action.
Then, the biasing force of the coil spring 80 follows the nut 70 and moves toward the front in the optical axis direction L while the contact portion 44, that is, the lens frame 40 is in contact, and appropriately controls the driving amount. Positioned at the position, it moves further forward and returns to the initial position.

In this driving operation, the lens frame 40 can stably move in the optical axis direction L without causing rattling or the like, and when mounted on an optical pickup unit or the like, the lens frame 40 can be used even during lens driving. The axis L does not fluctuate, the focus can be kept constant, and image shake or the like can be prevented.
In other words, according to this device, the coil spring 80 (biasing member) that serves both to urge the nut 70 toward the lens frame 40 and to rotate and urge the lens frame 40 is employed, so that the lens frame 40 In addition to preventing rattling and image shaking, the number of parts can be reduced as compared with the case where separate urging members are provided, and the structure can be simplified and the apparatus can be downsized.

  5 to 9 show another embodiment of the lens driving device according to the present invention. FIG. 5 is an exploded perspective view of the device, FIG. 6 is a partial perspective view of the device, and FIG. 7 is a partial front view of the device. 8, 8 and 9 are partial sectional views of the apparatus. In this embodiment, a plate spring 80 ′ is employed as the urging member, and the same as the above-described embodiment except that a lens frame 40 ′ and a nut 70 ′ corresponding to the plate spring 80 ′ are employed. About the same structure, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

  In this apparatus, as shown in FIGS. 5 to 9, the lens frame 40 ′ is brought into contact with an annular portion 41 for holding the lens G, an extending portion 42, a connecting portion 43 having an opening 43a, and a nut 70 ′. A contact portion 44 ′, a substantially U-shaped connecting portion 46, a detected piece 47, an inclined portion 48 ′ (see FIG. 9) formed continuously from the contact portion 44 ′, and the like.

  As shown in FIGS. 5 and 9, the nut 70 ′ includes an inclined portion 70 a ′ that comes into contact with the inclined portion 48 ′ while being in contact with the contact portion 44 ′ of the lens frame 40 ′. In other words, the inclined portion 70a ′ of the nut 70 ′ presses the inclined portion 48 ′ of the lens frame 40 ′ to urge the lens frame 40 ′ in the direction of the arrow R in a plane perpendicular to the optical axis L. It is formed so as to generate a biasing force.

  As shown in FIGS. 5 to 9, the leaf spring 80 ′ is assembled (held) by caulking or the like with respect to the extending portion 42 of the lens frame 40 ′. This leaf spring 80 ′ is inserted into the guide shaft 20 by being inserted into the annular portion 81 ′ that exerts a biasing force that biases the nut 70 ′ to the abutting portion 44 ′ of the lens frame 40 ′ and the opening 43 a of the connecting portion 43. A spring piece 82 'in the form of a cantilever that abuts is integrally provided.

In this configuration, the leaf spring 80 ′ urges the nut 70 ′ toward the lens frame 40 ′ (contact portion 44 ′) in the optical axis direction L, and at the same time, the inclined portion 70 a ′ of the nut 70 ′ and the lens frame 40 ′. In combination with the engagement relationship of the inclined portion 48 ′, a part of the urging force is converted into an urging force that urges the lens frame 40 ′ around the guide shaft 20, that is, in a direction R perpendicular to the optical axis L. Is formed.
Therefore, the leaf spring 80 'can always contact the lens frame 40' (contact portion 44 ') and the nut 70' by urging the nut 70 'toward the lens frame 40'. A backlash between the female screw of the nut 70 ′ and the male screw of the lead screw 60 is removed, and further, a biasing force that rotationally biases the lens frame 40 ′ through engagement between the nut 70 ′ and the lens frame 40 ′. Also works. In this way, by making the single leaf spring 80 'serve two roles, the structure can be further simplified and the apparatus can be further downsized while achieving cost reduction.

  Further, since the leaf spring 80 ′ is formed with a spring piece 82 ′ that extends in a cantilever shape so as to come into contact with the guide shaft 20, the inclination of the lens frame 40 ′ with respect to the guide shaft 20 can be prevented. . Furthermore, since the spring piece 82 ′ is formed integrally with the leaf spring 80 ′, it can be easily assembled without increasing the number of parts.

  Also in this apparatus, the lens frame 40 'can move stably in the optical axis direction L without causing rattling or the like, and when mounted on an optical pickup unit or the like, even during driving of the lens. The optical axis L does not fluctuate, the focus can be kept constant, and image shake or the like can be prevented. That is, according to this device, by adopting the leaf spring 80 '(biasing member) that serves both to urge the nut 70' to the lens frame 40 'and to rotate and urge the lens frame 40', It is possible to prevent rattling of the lens frame 40 ', image shaking, and the like, and it is possible to reduce the number of parts compared to the case where separate urging members are provided, thereby achieving simplification of the structure, miniaturization of the apparatus, and the like.

In the above embodiment, one lens frame 40, 40 'is shown as a lens frame that moves in the optical axis direction L, but the present invention is not limited to this, and the present invention is applied to a configuration including a plurality of lens frames. can do.
In the above configuration, the coil spring 80 as the urging member has been shown around the guide shaft 20. However, the present invention is not limited to this, and the configuration in which the coil spring 80 is arranged around the lead screw 60 is not limited thereto. It is also possible to adopt the invention.
In the above embodiment, the case where the guide shaft 20 and the non-rotating shaft 30 are employed as the shafts that support the lens frames 40 and 40 ′ in the optical axis direction L is shown, but the guide shaft 20 is omitted and the lead screw 60 is omitted. However, the present invention may be employed in a configuration that also serves as the role.

  As described above, the lens driving device of the present invention prevents the rattling, decentering, tilting, image shaking, etc. of the lens frame while achieving the simplification of the structure, the reduction in the number of parts, the downsizing of the device, and the like. Since the lens frame (lens) can be stably driven with high accuracy in the optical axis direction, it can be applied to an optical pickup unit or the like, as long as it is necessary to prevent the vibration of the lens frame itself. It is also useful for other lens optical systems.

It is a disassembled perspective view which shows one Embodiment of the lens drive device which concerns on this invention. It is a fragmentary perspective view of the lens drive device shown in FIG. It is a partial front view of the lens drive device shown in FIG. It is a partial top view of the lens drive device shown in FIG. It is a disassembled perspective view which shows other embodiment of the lens drive device which concerns on this invention. FIG. 6 is a partial perspective view of the lens driving device shown in FIG. 5. FIG. 6 is a partial front view of the lens driving device shown in FIG. 5. It is a fragmentary sectional view of the apparatus in E1-E1 in FIG. It is a fragmentary sectional view of the apparatus in E2-E2 in FIG.

Explanation of symbols

L Optical axis direction 10 Base 12, 13 Through hole 14, 15 Fitting hole 16 Fixing part 17 Wall part 18 Screw hole 20 Guide shaft 30 Non-rotating shaft 40, 40 'Lens frame 41 Annular part 42 Extension part 43 Connecting part 43a Opening 44, 44 'Contacting part 45 Latching groove 46 Connecting part 47 Detected piece 48' Inclined part 50 Motor (drive source)
60 Lead screw 70, 70 'Nut 70a Protrusion 70a' Inclined portion 80 Coil spring (biasing member)
81 One end 82 The other end 80 'Leaf spring (biasing member)
81 ′ annular portion 82 ′ spring piece 90 cover 100 detection sensor

Claims (5)

A base, a drive source fixed to the base, a lead screw that is rotationally driven by the drive source, a lens frame that holds a lens, a shaft that is fixed to the base and supports the lens frame movably in the optical axis direction, A lens driving device comprising: a nut screwed to the lead screw and abutting non-rotatably against the lens frame in an optical axis direction; and a biasing member biasing the nut toward the lens frame,
The biasing member is formed to rotate and bias the lens frame in a plane perpendicular to the optical axis.
A lens driving device. The biasing member comprises a coil spring attached in a state twisted by a predetermined angle.
The lens driving device according to claim 1. The shaft includes a guide shaft that is arranged in parallel in the vicinity of the lead screw and slidably guides the lens frame, and a detent shaft that restricts rotation of the lens frame,
The coil spring is arranged around the guide shaft, one end of which is hooked to the lens frame, and the other end is hooked to the base.
The lens driving device according to claim 2. The urging member is composed of a leaf spring that contacts the nut in the optical axis direction,
The nut is formed to convert a part of the urging force of the leaf spring into an urging force that urges the lens frame in a direction perpendicular to the optical axis.
The lens driving device according to claim 1. The shaft includes a guide shaft that is arranged in parallel in the vicinity of the lead screw and slidably guides the lens frame, and a detent shaft that restricts rotation of the lens frame,
The leaf spring is integrally held with a spring piece that is held by the lens frame and that extends in a cantilever shape so as to abut on the guide shaft.
The lens driving device according to claim 4.

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