JP2007010944A - Lens drive device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent backlash of a lens frame guided by a guide shaft. <P>SOLUTION: The lens drive device includes a guide shaft 10 extending in the direction of an optical axis, a lens frame 30 having an engagement part 32 freely slidably engaged with the guide shaft 10, etc. As a pressing means to press the engagement part 32 toward the outer peripheral face of the guide shaft 10, an approximately-C-shaped snap ring 40 is adopted. The snap ring 40 includes: an abutting part 41 that abuts on the guide shaft 10 so as to sandwich the guide shaft 10 in conjunction with the engagement part 32; and a pair of elastic pieces 42 connected to the engagement part 32 in a snap fitting manner so as to grip the engagement part 32 in order to press the abutting part 41 toward the guide shaft 10. This makes it possible for the pressing forces of the pair of elastic pieces 42 to press the abutting part 41 and engagement part 32 so that they come into firm contact with the outer peripheral face of the guide shaft 10, thereby concentrating backlash. Accordingly, the lens frame 30 is moved in the direction of the optical axis while smoothly guided by the guide shaft 10 without causing backlash. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a lens driving device that is mounted on an optical apparatus such as a camera or a projector and drives a lens in an optical axis direction for zooming or focusing, and in particular, a lens frame with respect to a guide shaft that extends in the optical axis direction. The present invention relates to a lens driving device that is slidably fitted and moved.

  As a conventional lens driving device, a lens frame that holds a lens, a guide shaft that extends in the optical axis direction, a lens frame that is formed in the lens frame and is slidably engaged with the guide shaft and guided in the optical axis direction. A torsion coil spring or plate that urges the lens frame (engagement portion) to be in close contact with the guide shaft so as to prevent the lens frame from rattling by loosening the engagement portion to the guide shaft. A device provided with a spring or the like is known (see, for example, Patent Document 1).

However, in this device, a torsion coil spring or the like is used for loosening, so it is necessary to provide a dowel or the like for positioning or latching the coil portion and end of the torsion coil spring, which complicates the structure. This will lead to an increase in size.
Further, when the structure for attaching the torsion coil spring is complicated, the manufacturing cost and the number of assembling steps are increased, and the clearance is accumulated due to the increase in the number of parts or portions, leading to a decrease in reliability.

JP 2001-242369 A

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a stable drive performance free from rattling while simplifying the structure and reducing the number of parts. An object of the present invention is to provide a small lens driving device having high impact and low cost.

The lens driving device according to the present invention includes a guide shaft extending in the optical axis direction, a lens frame having an engaging portion that holds the lens and is slidably engaged with the guide shaft, and the engaging portion on the outer peripheral surface of the guide shaft. A lens driving device that includes an urging unit that urges toward the optical axis and moves the lens in the optical axis direction, and the urging unit contacts the guide shaft so as to sandwich the guide shaft in cooperation with the engaging portion. It is a substantially C-shaped snap ring including a pair of elastic pieces that are snap-fit coupled so as to grip the engaging portion so as to urge the portion and the contact portion toward the guide shaft.
According to this configuration, when the snap ring is coupled by snap-fitting the pair of elastic pieces to the engaging portion in a state where the engaging portion of the lens frame is engaged with the guide shaft, the biasing force of the pair of elastic pieces is The abutting portion and the engaging portion are urged so as to be in close contact with the outer peripheral surface of the guide shaft, and the play is shifted. As a result, the lens frame is guided by the guide shaft and moves in the optical axis direction in a stable state without rattling.
Further, by adopting a substantially C-shaped snap ring having a contact portion and a pair of elastic pieces as the biasing means, the structure is simplified and the assembly can be easily performed. Impact properties can be improved.

In the above configuration, the snap ring may be configured to be formed so as to integrally define the contact portion and the pair of elastic pieces using a resin material.
According to this configuration, since the snap ring is formed as a single component, the number of components can be reduced compared with the case where the contact portion and the pair of elastic pieces are separately formed and then assembled, and the manufacturing cost and assembly can be reduced. Man-hours can be reduced.

In the above configuration, the engaging portion has an arc-shaped sliding portion in which a part of the cylinder is cut out so as to slide on the outer peripheral surface of the guide shaft, and the contact portion is a side facing the arc-shaped sliding portion. In this case, a configuration that is formed so as to be in line contact with the outer peripheral surface of the guide shaft can be employed.
According to this configuration, since the lens frame is reliably guided to the guide shaft by the arc-shaped sliding portion, and the contact portion is in line contact with the outer peripheral surface of the guide shaft, the sliding resistance can be reduced, and the lens The frame can be smoothly moved along the guide shaft.

The said structure WHEREIN: A pair of elastic piece can employ | adopt the structure currently formed in arc shape so that the outer peripheral surface of an engaging part may be followed.
According to this configuration, when a pair of elastic pieces are snap-fit connected to the engaging portion (attached so as to grasp the engaging portion), a reliable connection is obtained and a strong biasing force (deformation of the elastic piece) ( Play).

The said structure WHEREIN: The structure which has a control part which controls that a snap ring moves relatively in an optical axis direction can be employ | adopted for an engaging part.
According to this configuration, when the lens frame moves along the guide shaft in the optical axis direction, the snap ring always moves integrally without moving relative to the engaging portion. The backlash is reliably performed in the entire area.

In the above configuration, the guide shaft includes a first guide shaft and a second guide shaft arranged in parallel with each other, and the lens frame is slidably engaged with the first guide shaft over a predetermined length. A first lens frame having the engaging portion to be joined, and a second lens frame having the engaging portion that is slidably engaged with the second guide shaft over a predetermined length. The engaging portion of the frame has a first engaging piece for engaging one end of the coil spring, and the engaging portion of the second lens frame has a second engaging piece for engaging the other end of the coil spring. The first latching piece and the second latching piece are formed so as to incline the first lens frame and the second lens frame in the same direction in a state where the coil spring is stretched. Can be adopted.
According to this configuration, the first lens frame and the second lens frame are slidably guided by the first guide shaft and the second guide shaft, respectively, by using the snap ring, without causing backlash. The thrust is pulled in the optical axis direction by a coil spring stretched between the first and second latching pieces, and the backlash in the thrust direction between the first lens frame and the second lens frame is removed. As a result, the drive amount (feed amount) in the optical axis direction can be controlled with high accuracy. Here, in particular, the first lens frame and the second lens frame are inclined in the same direction by the pulling force of the coil spring, and the engaging portion of the first lens frame and the engaging portion of the second lens frame are respectively The first guide shaft and the second guide shaft are loosely moved against the outer peripheral surface. Accordingly, the first lens frame and the second lens frame are driven in the optical axis direction in a more stable state without causing backlash. In addition, since the first lens frame and the second lens frame are inclined in the same direction, the optical axes (axis alignment) of the respective lenses can be easily performed.

  According to the lens driving device having the above-described configuration, a stable driving performance without rattling can be obtained while simplifying the structure and reducing the number of parts, etc., high impact resistance, low cost, and small lens driving. An apparatus can be provided.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the invention will be described with reference to the accompanying drawings.
1 to 3 show an embodiment of a lens driving device according to the present invention. FIG. 1 is an external perspective view of the device, FIG. 2 is an exploded perspective view of the device, and FIG. 3 is a side view of the device. FIG.
As shown in FIGS. 1 and 2, this apparatus holds two guide shafts 10 and 20 extending in parallel to the optical axis direction L and a lens G, and slides in the optical axis direction L by the guide shafts 10 and 20. A lens frame 30 that is movably guided, a snap ring 40 as an urging means that is attached to an engaging portion 32 described later of the lens frame 30, a nut 50 that is held by the lens frame 30, and a lead screw that is screwed into the nut 50 60, a stepping motor 70 directly connected to the lead screw 60, and the like.

As shown in FIGS. 1 and 2, the guide shaft 10 is formed using a metal material or the like so as to have a circular cross section and extend in the optical axis direction L, and slide the lens frame 30 in the optical axis direction L. It will guide you freely.
As shown in FIGS. 1 and 2, the guide shaft 20 is formed to have a circular cross section and extend in the optical axis direction L using a metal material or the like, and the lens frame 30 rotates around the optical axis. Is to regulate.

  The lens frame 30 is formed using a resin material or the like, and as shown in FIGS. 1 and 2, an annular holding portion 31 that holds the lens G, and an abbreviation having a predetermined length in the optical axis direction L from the holding portion 31. A cylindrical engaging portion 32; a substantially U-shaped engaging portion 33 protruding radially outward from the holding portion 31; a nut holding portion 34 protruding radially outward from the holding portion 31 and defining a circular hole 34a; A detected piece 35 and the like are provided.

As shown in FIGS. 1 to 3, the engaging portion 32 is formed in a substantially cylindrical shape, and an arcuate sliding portion 32 a in which a part of the cylinder is cut out so as to slide on the outer peripheral surface of the guide shaft 10. The arcuate sliding portion 32a is provided with restricting portions 32b defined at both ends in the optical axis direction L.
The arcuate sliding portion 32a is formed so as to slide in contact with the outer peripheral surface of the guide shaft 10 in an arc shape, and causes the lens frame 30 to follow the guide shaft 10.
The restricting portion 32b restricts the snap ring 40 from moving relative to the engaging portion 32 in the optical axis direction L in a state where the snap ring 40 is coupled to the arcuate sliding portion 32a.

  As shown in FIGS. 1 to 3, the engaging portion 33 is formed in a substantially U shape so as to sandwich the outer peripheral surface of the guide shaft 20. The engaging portion 33 is slidably engaged with the guide shaft 20 so that the lens frame 30 rotates around the optical axis when the lens frame 30 is guided along the guide shaft 10 in the optical axis direction L. To regulate.

As shown in FIGS. 1 to 3, the nut holding part 34 includes a circular hole 34 a through which the lead screw 60 is passed in a non-contact manner, a recess 34 b that inserts a protrusion 51 (to be described later) of the nut 50 and restricts rotation of the nut 50. It has.
That is, the nut holding part 34 holds the nut 50 in a non-rotatable manner by the recess 34b and allows the lead screw 60 to be screwed into the nut 50 through the circular hole 34a.

  The detected piece 35 is used when the position (initial position) of the lens frame 30 in the optical axis direction L is detected by an optical sensor (not shown) (for example, a photo interrupter having a light emitting element and a light receiving element). is there.

As shown in FIGS. 1 to 3, the snap ring 40 is formed of a resin material so as to be substantially C-shaped, and sandwiches the guide shaft 10 in cooperation with the engaging portion 32 (arc-shaped sliding portion 32a). The contact portion 41 that makes contact, and a pair of elastic pieces 42 that extend in an arc shape from the contact portion 41 are integrally provided.
As described above, since the contact portion 41 and the pair of elastic pieces 42 are integrally formed of a resin material, the snap ring 40 can be handled as a single component, and each is assembled after being formed separately. In comparison, the number of parts can be reduced, and the manufacturing cost and assembly man-hour can be reduced.

The contact portion 41 includes a substantially V-groove inclined surface 41a formed so as to be in line contact with the outer peripheral surface of the guide shaft 10 on the side facing the arcuate sliding portion 32a.
As described above, the contact portion 41 is formed so as to be in line contact with the outer peripheral surface of the guide shaft 10, so that sliding resistance can be reduced, and the lens frame 30 moves smoothly along the guide shaft 10. Can be made.

  The pair of elastic pieces 42 are formed in an arc shape along the outer peripheral surface of the engaging portion 32, and when they are snap-fit coupled so as to grasp the engaging portion 32, they are pushed outward and elastically deformed. The restoring force that restores the elastic deformation urges the engaging portion 32 (arc-shaped sliding portion 32a) against the outer peripheral surface of the guide shaft 10, and from the side facing the arc-shaped sliding portion 32a. The abutting portion 41 is urged so as to be pressed against the outer peripheral surface of the guide shaft 10.

  As described above, a simple attachment operation in which the pair of elastic pieces 42 are snap-fit connected to the engaging portion 32 provides a reliable connection and generates a strong biasing force (backlash force) due to the deformation of the elastic pieces 42. Thus, rattling between the guide shaft 10 and the engaging portion 32 is prevented, and the lens frame 30 can move in the optical axis direction L stably.

  Further, since the engaging portion 32 is provided with a restricting portion 32b for restricting the relative movement of the snap ring 40, when the lens frame 30 moves in the optical axis direction L along the guide shaft 10, Since the snap ring 40 always moves integrally without moving relative to the engaging portion 32, the rattling is surely performed in the entire moving range.

  As shown in FIG. 2, the nut 50 is held with its one end face in contact with the nut holding portion 34, and the protrusion 51 is inserted into the concave portion 34 b and is restricted from rotating around the lead screw 60. It has come to be.

  As shown in FIGS. 1 to 3, the lead screw 60 is directly connected to the stepping motor 70, and is inserted through the circular hole 34 a of the nut holding portion 34 and screwed into the nut 50. The nut 50 is urged so as to be in close contact with the nut holding portion 34 by a coil spring (not shown) wound around the guide shaft 10 so as to be stretchable and pressed against the engaging portion 32. Yes.

Next, the assembly of this apparatus will be briefly described.
First, the two guide shafts 10 and 20 are fixed to a base (not shown). Then, the engaging portion 33 is engaged so as to sandwich the guide shaft 20, and the guide shaft 10 is inserted into the engaging portion 32.
Subsequently, the snap ring 40 is attached by snap-fit coupling so that the engaging portion 32 (arc-shaped sliding portion 32a) is gripped by the pair of elastic pieces 42. Then, the sliding engagement portion 32a and the contact portion 41 are urged so as to be in close contact with the outer peripheral surface of the guide shaft 10 due to the restoring force of the pair of elastic pieces 42 being pushed out and returned to the original state. Shifting (backlash removal) is performed.

Subsequently, the nut 50 is attached to the nut holding portion 34, and the lead screw 60 is screwed into the nut 50 through the circular hole 34a. Thereafter, the stepping motor 70 is fixed to a base (not shown).
Further, a cover (not shown) or the like is attached to the distal end side of the guide shafts 10 and 20, and other parts are appropriately attached to complete the assembly of the apparatus.
As described above, the snap ring 40 can be loosely moved between the guide shaft 10 and the engaging portion 32 only by a simple assembling operation for snap-fit coupling, or by a simple single-piece structure called the snap ring 40. )It can be performed.
Further, according to the snap ring 40, since the pair of elastic pieces 42 are formed to be curved in an arc shape along the outer peripheral surface of the engaging portion 32 so that the coupling force is increased, the impact resistance is high, It is possible to reliably prevent rattling.

Next, the operation of this apparatus will be briefly described.
When the stepping motor 70 rotates in one direction, the lead screw 60 rotates, and the lens frame 30 is guided by the guide shafts 10 and 20 through the nut 50 and moves in the optical axis direction L.
At this time, since the engagement portion 32 and the guide shaft 10 are loosely moved (removed) by the snap ring 40, the lens frame 30 is stably moved in the optical axis direction L without causing backlash.
As described above, by adopting the snap ring 40 having a simple single-piece structure as the biasing means for biasing the engaging portion 32 to the outer peripheral surface of the guide shaft 10, the structure is simplified, the number of parts is reduced, and low Cost reduction and downsizing can be achieved, and stable driving performance without backlash can be obtained.

  4 to 9 show another embodiment of the lens driving device according to the present invention. FIG. 4 is an exploded perspective view of the device, FIG. 5 is a perspective view showing a part of the device, and FIG. FIG. 7 is a side view showing a part of the operating state of the apparatus, FIG. 7A is a state diagram at the wide-angle end (WIDE), and FIG. 7B is a state diagram at the telephoto end (TELE). FIG. 9 is a cross-sectional view showing an operating state of a part of the apparatus, (a) is a state diagram at the wide-angle end (WIDE) and (b) is a state diagram at the telephoto end (TELE), and FIG. It is a perspective view. In addition, about the structure same as the above-mentioned embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted.

In this apparatus, as shown in FIGS. 4 to 6, one end is fixed to the base 100, extends in the optical axis direction L, and is parallel to each other, the first guide shaft 10 and the second guide shaft 10 and the guide. The engaging portion 32 of the shaft 20, the first lens frame 30 ′ and the second lens frame 30 ″ guided by the guide shafts 10, 10, 20, the first lens frame 30 ′ and the second lens frame 30 ″. , 32, snap rings 40, 40, coil springs 80 stretched between the first lens frame 30 ′ and the second lens frame 30 ″, an optical sensor 90 (one not shown), the first It is connected to nuts 50 and 50, lead screws 60 and 60, stepping motors 70 and 70, and base 100 for driving the lens frame 30 ′ and the second lens frame 30 ″, respectively. The other end of the three guide shafts 10,10,20 is provided with a cover 110 or the like to be fixed with.
In this apparatus, the assembly work of the parts according to the present invention and the operation of the apparatus are basically the same as those in the above-described embodiment, and thus the description thereof is omitted here.

The base 100 is formed of a resin material and serves as a reference for fixing the guide shafts 10, 10, and 20, as shown in FIG. 4, and holds an image pickup device such as a CCD on the back surface.
The cover 110 is formed of a resin material, and holds the lens G1 and is coupled to the base 100 to form an outer contour as shown in FIG.

As shown in FIGS. 4 to 8, the first lens frame 30 ′ includes a holding portion 31 that holds the lens G <b> 2, a substantially cylindrical engagement portion 32, a substantially U-shaped engagement portion 33, and a substantially U-shape. Nut holding portion 34 ′, detected piece 35, first latching piece 36 ′ formed on engaging portion 32, and the like.
As shown in FIGS. 4 to 8, the second lens frame 30 ″ includes a holding portion 31 that holds the lens G <b> 3, a substantially cylindrical engagement portion 32, a substantially U-shaped engagement portion 33, and a substantially U shape. A nut holding portion 34 ″, a detected piece 35, a second hooking piece 36 ″ formed on the engaging portion 32, and the like.
One end 81 of the coil spring 80 is hooked to the first hooking piece 36 ′, and the other end 82 is hooked to the second hooking piece 36 ″, and the first lens frame 30 ′ and the second lens frame. An urging force is exerted so as to draw 30 ″ in the optical axis direction L.

  As described above, the first lens frame 30 ′ and the second lens frame 30 ″ employ the snap rings 40 and 40, respectively, so that the first guide shaft 10 and the second guide shaft 10 do not rattle. The first lens frame is guided in a slidable manner and is drawn in the optical axis direction L by a coil spring 80 stretched between the first hooking piece 36 ′ and the second hooking piece 36 ″. The backlash in the thrust direction is performed between 30 ′ and the second lens frame 30 ″, and the drive amount (feed amount) in the optical axis direction L can be controlled with high accuracy.

  Here, as shown in FIGS. 7 and 8, the first latching piece 36 ′ and the second latching piece 36 ″ are outside on the outside in the optical axis direction L and perpendicular to the optical axis direction L. It is formed so as to protrude in a direction approaching each other in various directions. Therefore, in the state where the coil spring 80 is stretched between the first latching piece 36 ′ and the second latching piece 36 ″, as shown in FIGS. 7 and 8, the first lens frame 30 ′ and The second lens frame 30 ″ is tilted in the same direction by the counterclockwise rotational moment and is loosely moved.

  As described above, the first lens frame 30 ′ and the second lens frame 30 ″ are inclined in the same direction by the pulling force of the coil spring 80, so that the engaging portion 32 and the second lens frame 30 ′ are engaged with each other. Since the engaging portions 32 of the lens frame 30 ″ are rattled with respect to the outer peripheral surfaces of the first guide shaft 10 and the second guide shaft 10, respectively, the first lens frame 30 ′ and the second lens frame 30 ′. ′ Is driven in the optical axis direction L in a more stable state without causing backlash. Further, since the first lens frame 30 ′ and the second lens frame 30 ″ are inclined in the same direction, the optical axes (axis alignment) of the lenses G 2 and G 3 can be easily performed.

FIG. 9 shows an application example in which the lens driving device M having the above configuration is mounted on the mobile phone 200.
That is, the mobile phone 200 includes a main body 201 on which various operation buttons are arranged, a lid body 202 on which a monitor is arranged, and the like, and the lens driving device M has a lens G1 on the outer surface of the lid body 202 of the mobile phone 200. It is mounted to face.
As described above, the lens driving device M of the present invention can be easily mounted on the mobile phone 200 that is small and thin.

In the above embodiment, the case where the snap ring 40 as the urging means is integrally formed of a resin material has been shown. However, the present invention is not limited to this, and the contact portion 41 and the pair of elastic pieces 42 are separately provided. It is good also as an integrated product after assembling.
In the above embodiment, the case where the arcuate sliding portion 32a in which a part of the cylinder is cut out is employed as the engaging portion 32 that engages with the guide shaft 10 is not limited thereto. Other shapes may be adopted as long as the guide shaft 10 is sandwiched in cooperation with the snap ring 40.
In the above embodiment, the case where the contact portion 41 of the snap ring 40 is formed as an inclined surface so as to be in line contact with the outer peripheral surface of the guide shaft 10 is shown, but the present invention is not limited to this. Other shapes that make point contact or surface contact may be adopted as long as the guide shaft 10 is sandwiched in cooperation with the portion 32.

  As described above, the lens driving device of the present invention achieves a stable driving performance without rattling while achieving a simplified structure, a reduction in the number of parts, etc., high impact resistance, low cost, and small size. Therefore, it can be applied as a lens driving device of a mobile camera mounted on a mobile phone, a portable personal computer, etc., or as a lens driving device of a lens optical system mounted on a projector, etc. It is useful as a lens driving device for a lens optical system.

1 is an external perspective view showing an embodiment of a lens driving device according to the present invention. It is a disassembled perspective view of the lens drive device shown in FIG. (A) is a side view of the lens drive device shown in FIG. 1, (b) is a sectional view taken along line E1-E1 in (a). It is a disassembled perspective view which shows other embodiment of the lens drive device which concerns on this invention. It is a fragmentary perspective view which shows a part of lens drive device shown in FIG. It is a front view which shows a part of lens drive apparatus shown in FIG. 4A and 4B illustrate the operation of the lens driving device shown in FIG. 4, where FIG. 5A is a partial side view showing a state at a wide angle end, and FIG. 5B is a partial side view showing a state at a telephoto end. 4A and 4B are diagrams for explaining the operation of the lens driving device shown in FIG. 4, where FIG. 5A is a partial cross-sectional view showing a state at a wide-angle end, and FIG. 5B is a partial cross-sectional view showing a state at a telephoto end. It is a perspective view which shows the state which mounted the lens drive device shown in FIG. 4 in a mobile telephone.

Explanation of symbols

G, G1, G2, G3 Lens L Optical axis direction 10, 20 Guide shaft 30 Lens frame 31 Holding part 32 Engaging part 32a Arc-shaped sliding part 32b Restricting part 33 Engaging part 34, 34 ', 34''Nut holding part 35 Detected piece 40 Snap ring (biasing means)
41 abutting portion 42 a pair of elastic pieces 50 nut 60 lead screw 70 stepping motor 30 'first lens frame 30 "second lens frame 36" first hook piece 36 "second hook piece 80 coil spring 81 one end 82 Other end 100 Base 110 Cover

Claims (6)

A guide shaft extending in the optical axis direction, a lens frame having an engaging portion that holds the lens and is slidably engaged with the guide shaft, and urges the engaging portion toward the outer peripheral surface of the guide shaft. A lens driving device that includes an urging unit and moves the lens in the optical axis direction,
The urging means grasps the engaging portion so as to urge the abutting portion toward the guide shaft and the abutting portion that abuts so as to sandwich the guide shaft in cooperation with the engaging portion. A substantially C-shaped snap ring including a pair of elastic pieces that are snap-fit to each other.
A lens driving device. The snap ring is formed so as to integrally define the contact portion and the pair of elastic pieces using a resin material.
The lens driving device according to claim 1. The engaging portion has an arc-shaped sliding portion in which a part of a cylinder is cut out so as to slide on the outer peripheral surface of the guide shaft,
The contact portion is formed so as to be in line contact with the outer peripheral surface of the guide shaft on the side facing the arcuate sliding portion.
The lens driving device according to claim 1 or 2, wherein The pair of elastic pieces are formed in an arc shape along the outer peripheral surface of the engaging portion.
The lens driving device according to claim 3. The engaging portion has a restricting portion that restricts relative movement of the snap ring in the optical axis direction.
The lens driving device according to claim 1, wherein the lens driving device is a lens driving device. The guide shaft includes a first guide shaft and a second guide shaft arranged in parallel to each other,
The lens frame includes a first lens frame having the engagement portion that is slidably engaged with the first guide shaft over a predetermined length, and a predetermined length slidably with respect to the second guide shaft. Including a second lens frame having the engaging portion engaged over the length,
The engaging portion of the first lens frame has a first hooking piece for hooking one end of the coil spring,
The engaging portion of the second lens frame has a second hooking piece for hooking the other end of the coil spring,
The first latching piece and the second latching piece are formed to incline the first lens frame and the second lens frame in the same direction in a state where the coil spring is stretched.
The lens driving device according to claim 3, wherein the lens driving device is a lens driving device.

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