JP2006047356A - Lens drive unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens drive unit which is equipped with a driving source for driving a lens in an optical axis direction, and also, which can be loaded in the narrow space of a portable information terminal or the like. <P>SOLUTION: A stepping motor for rotating a cam cylinder 30 for imparting a cam work in the optical axis direction to a lens frame 10 is constituted of: a rotor constituted of a permanent magnet 80 fixed to the cam cylinder 30, and cores 60 and 70; and a stator 90 for generating magnetic force for rotating the rotor by supplying power. By having this constitution, the unit constitution is simplified, the unit is made small in size and light in weight, and also, the impact-resistant structure of the unit can be attained. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a lens driving device including a driving source for driving a lens in an optical axis direction, and more particularly to a lens driving device for a camera that can be mounted in a narrow space such as a portable information terminal.

A camera mounted on a portable information terminal such as a mobile phone or a portable personal computer needs to be as small as possible since the mounting space of the portable information terminal is small.
On the other hand, in order to give the camera an automatic focusing function or the like, a lens driving device including a driving source for driving the lens in the optical axis direction is necessary. As such a lens driving device, a lens barrel that is movable in the optical axis direction, a motor that drives the lens barrel, and a gear mechanism that transmits the driving force of the motor to the lens barrel are known ( For example, see Patent Document 1).

JP 2001-133672 A

  However, since the above lens driving device uses a gear mechanism, the number of parts is large, the structure is complicated, and the device becomes large. Therefore, it is difficult to reduce the size so that it can be mounted on a mobile phone, and the number of parts is large. Assembly man-hours also increase. Furthermore, in the above lens driving device, an impact absorbing mechanism such as a clutch mechanism is required between the lens barrel and the gear mechanism, which makes it more difficult to reduce the size of the device.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to mount a lens in a narrow space such as a portable information terminal while having a drive source for driving the lens in the optical axis direction. It is an object of the present invention to provide a lens driving device that can be easily assembled and is resistant to impact.

The lens driving device according to the present invention includes a lens frame that holds a lens, a fixed frame that supports the lens frame so as to be movable in the optical axis direction, and is rotatably supported by the fixed frame and is rotated to rotate the optical axis. An annular cam cylinder that exerts a cam action in the direction on the lens frame, and a stepping motor that rotates the cam cylinder. The stepping motor includes a rotor held by the cam cylinder and a rotor held by the fixed frame. And a stator that generates a rotating magnetic force by energization.
According to this configuration, when the rotor receives a magnetic force from the stator, the cam barrel rotates, and the lens frame is driven in the optical axis direction by the cam action of the cam barrel. As described above, since the rotor is held by the cam cylinder and is directly rotated by the magnetic force, a transmission mechanism such as a gear mechanism for transmitting the rotational force between the cam cylinder and the stepping motor is not necessary. The apparatus can be miniaturized, and has a structure that is resistant to impact, and can be easily assembled.

In the above configuration, the rotor includes an annular permanent magnet and an annular core disposed in contact with the permanent magnet, and the stator includes a yoke including a plurality of facing portions facing the core, and the facing portion and the yoke. It is possible to employ a configuration having an exciting coil wound around the connecting portion.
According to this configuration, since the magnetic attraction force acts between the core and the yoke by the permanent magnet, the rotational position of the cam cylinder is maintained by the magnetic attraction force even when the energization to the excitation coil is stopped. The lens frame is also held at a fixed position in the optical axis direction. This eliminates the need for a holding mechanism for holding the rotational position of the cam cylinder.

In the above configuration, it is possible to adopt a configuration in which the yoke is formed in a rectangular shape so as to surround the cam cylinder, and the facing portion and the exciting coil are provided at the corners of the yoke.
According to this configuration, the space between the facing portion and the coil can be integrated, and the apparatus can be downsized.

In the above configuration, the permanent magnet is magnetized in the optical axis direction, and the core is disposed corresponding to each magnetic pole of the permanent magnet and has the same number of teeth formed at the same pitch and the rear core. The teeth of the front core and the rear core are arranged so as to be shifted from each other by an angle corresponding to half of the pitch, and the plurality of facing portions are formed at the same pitch as the teeth of the front core and the rear core. A configuration having a plurality of teeth arranged such that relative positions of the front core and the rear core with respect to the teeth are shifted by an angle corresponding to a quarter of the pitch in the circumferential direction can be adopted.
According to this configuration, the rotational resolution of the rotor can be reduced to a quarter of the angle corresponding to the tooth pitch, and the cam cylinder can be accurately positioned.

In the above configuration, the fixed frame has a base portion that holds the imaging element, and a cylindrical support portion that extends from the base portion in the optical axis direction, and the cam cylinder is rotatable on the outer peripheral surface of the support portion, and The lens frame is slidably supported on the front surface of the base portion, and the lens frame is inserted into a guide groove formed to extend in the optical axis direction in the support portion and engages with a cam formed on the front end surface of the cam barrel. It is possible to adopt a configuration that has a protruding piece and is supported so as to be movable in the optical axis direction inside the support portion.
According to this configuration, the apparatus can be reduced in diameter, and since the stator, the cam barrel, and the lens frame have only to be assembled from the front of the fixed frame, assembly becomes very easy.

According to the above configuration, the fixed frame is connected to the cover having an opening through which subject light passes, and the cover is interposed between the lens frame and one end of the spring that biases the lens frame toward the fixed frame. It is possible to adopt a configuration in which the stator is held in cooperation with the fixed frame while receiving the portion.
According to this configuration, the assembly of the apparatus becomes easy and the number of parts can be reduced.

In the above configuration, the yoke can be configured to be formed so as to determine the outer contour in cooperation with the cover.
According to this configuration, since the yoke is exposed to the outside of the apparatus, the heat generated by the stepping motor can be efficiently released to the outside.

  According to the lens driving device of the present invention, a driving source for driving the lens in the optical axis direction can be provided, and the lens driving device can be mounted in a narrow space such as a portable information terminal. The lens can be precisely positioned 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 9 show an embodiment of a lens driving device according to the present invention. FIG. 1 is a perspective view showing the appearance of the device, FIG. 2 is a sectional view of the device, and FIG. 3 is an exploded perspective view of the device. 4 is a front view of the apparatus with the cover removed, FIG. 5 is a timing chart showing the timing of energization of the coils, and FIGS. 6 to 9 are diagrams showing the state of the apparatus at each energization timing.

  As shown in FIGS. 1 to 4, this apparatus holds a lens frame 10 that holds a lens G inside, a CCD 100 as an image pickup device, and a fixed frame that supports the lens frame 10 movably in the optical axis direction L. 20. A cam cylinder 30 that is supported by the fixed frame 20 so as to be rotatable and that exerts a cam action in the optical axis direction L on the lens frame 10 by rotation, and has an opening through which subject light passes and is fixed to the fixed frame 20. Cover 40, spring 50 interposed between cover 40 and lens frame 10, annular front core 60 and rear core 70, which are fixed (held) to cam cylinder 30 and constitute a part of the rotor of the stepping motor, cam An annular permanent magnet 80 that is fixed (held) to the cylinder 30 and forms a part of the rotor of the stepping motor, and a part of the stepping motor that is fixed (held) to the fixed frame 20 is configured. To comprise a stator 90, and the like.

  In this apparatus, subject light passes from the optical axis direction L through the IR filter 41 and enters the lens G, and forms an image on the imaging surface of the CCD 100. The camera unit is formed by holding the CCD 100 on the fixed frame 20.

  The lens frame 10 is formed in a substantially cylindrical shape with resin, and as shown in FIGS. 2 to 4, the lens frame 10 is held on the inner side, and is formed on the outer peripheral surface 10 a made of a cylindrical surface and the front end surface. An annular groove 10c for receiving the spring 50, and three protruding pieces 11 formed to protrude at equal circumferential positions at the front end portion of the outer peripheral surface 10a are provided.

  The outer peripheral surface 10a is slidably fitted to an inner peripheral surface 21b described later of the fixed frame 20. The protruding piece 11 is inserted into a guide groove 22 described later of the fixed frame 20, and its rear surface engages with a cam 31 described later of the cam cylinder 30. Thereby, the lens frame 10 is supported so as to be movable in the optical axis direction L while being restricted from rotating around the optical axis with respect to the fixed frame 20.

The fixed frame 20 is made of resin, and is formed to have a rectangular outer contour as shown in FIGS. 1, 2, and 4, and a base 20a that holds the CCD 100 at the rear end and a front from the base 20a. And a cylindrical support 21 formed so as to protrude from the top.
A plurality of positioning pins 25 are provided on the front surface of the base portion 20a. The positioning pin 25 is fitted and inserted into a positioning hole 90h (described later) of the stator 90, positions the stator 90 with respect to the fixed frame 20, and is fitted and inserted into a positioning hole (not shown) formed in the cover 40. The cover 40 is positioned with respect to the fixed frame 20. A plurality of latching claws 26 extending in the optical axis direction L are integrally formed on the front surface of the base portion 20a. The cover 40 is fixed (connected) to the fixed frame 20 by the snap-fit coupling of the latching claw 26 to the cover 40.

  The support portion 21 rotatably supports the cam cylinder 30 by fitting an inner peripheral surface 30b (described later) of the cam cylinder 30 to the outer peripheral surface 21a. The support portion 21 supports the lens frame 10 on the inner side by fitting the outer peripheral surface 10a of the lens frame 10 to the inner peripheral surface 21b so as to be slidable. The support portion 21 is formed with three guide grooves 22 that are arranged at equal intervals in the circumferential direction and extend in the optical axis direction L. The guide groove 22 is inserted with the protruding piece 11 of the lens frame 10, restricts the rotation of the lens frame 10 around the optical axis, and guides the lens frame 10 so as to be movable in the optical axis direction L. Accordingly, the lens frame 10 is supported by the fixed frame 20 so as to be movable only in the optical axis direction L.

As shown in FIGS. 2 to 4, the cam cylinder 30 is formed in a ring shape on the outer peripheral surface 30 a on which the front core 60, the rear core 70, and the permanent magnet 80 are fitted, and the outer peripheral surface 21 a of the support portion 21. The inner peripheral surface 30b to be fitted, the annular rear surface 30e supported slidably on the fixed frame 20 (the front surface of the base portion 20a), and the annular front end surface are formed to engage with the protruding piece 11 of the lens frame 10. The cam 31 is provided with a flange portion 32 that protrudes from the rear end portion of the outer peripheral surface 30a, contacts the rear core 70, and defines the position in the optical axis direction L.
As shown in FIGS. 3 and 4, three cams 31 are provided with inclined surfaces in the optical axis direction L on the front end surface of the cam cylinder 30 and are formed at equal intervals in the circumferential direction. When the cam barrel 30 rotates with the cam 31 in contact with the protruding piece 11, the lens frame 10 follows the cam profile of the cam 31 and advances and retreats in the optical axis direction L.

As shown in FIGS. 1 to 4, the cover 40 is provided with an IR filter 41, an opening 42 through which subject light passes, an annular groove 43 for receiving the spring 50, and the like.
The cover 40 is in contact with the stator 90, and is fixed to the fixed frame 20 via the stator 90, thereby holding the stator 90 in cooperation with the fixed frame 20, and the stator 90 falls off from the fixed frame 20. To prevent.

  One end of the spring 50 is received in the annular groove 10 c of the lens frame 10, and the other end is received in the annular groove 43 of the cover 40 to urge the lens frame 10 toward the fixed frame 20. Thereby, the cam 31 of the cam cylinder 30 and the protruding piece 11 of the lens frame 10 are reliably engaged, and a smooth cam action is obtained.

  As shown in FIGS. 2 to 4, the front core 60 is formed by laminating a circular plate made of a magnetic material such as a silicon steel plate, and is fitted and fixed to the outer peripheral surface 30 a of the cam cylinder 30. The inner peripheral surface 60a has an annular fitting portion 60b in which a part of the permanent magnet 80 is fitted adjacent to the rear side of the inner peripheral surface 60a, and a plurality of teeth 61 formed at a predetermined pitch on the outer peripheral surface.

As shown in FIGS. 2 to 4, the rear core 70 is formed by laminating a circular plate made of a magnetic material such as a silicon steel plate, and is fitted and fixed to the outer peripheral surface 30 a of the cam cylinder 30. An inner peripheral surface 70a, an annular fitting portion 70b formed adjacent to the front side of the inner peripheral surface 70a and into which a part of the permanent magnet 80 is fitted, a plurality of teeth 71 formed on the outer peripheral surface at a predetermined pitch, and the like. Have. Further, the rear core 70 is in contact with the flange portion 32 of the cam cylinder 30 and is positioned with respect to the cam cylinder 30 in the optical axis direction L.
The teeth 61 and the teeth 71 are formed at the same pitch and the same number. Further, as shown in FIG. 4, the teeth 61 and the teeth 71 are arranged so that the teeth 61 and 71 are shifted from each other by an angle α / 2 corresponding to half the pitch (α is an angle corresponding to the pitch). Yes.

As shown in FIGS. 2 and 3, the permanent magnet 80 is fixed to the cam cylinder 30, and has a light pole so that the front side in the optical axis direction L has S poles and the rear side has N poles. Magnetized in the axial direction L. Further, the permanent magnet 80 is fitted into the fitting portions 60b and 70b and comes into contact with the front core 60 and the rear core 70, so that the permanent magnet 80, the front core 60, and the rear core 70 are relative to each other in the optical axis direction L. The positional relationship is defined, the front core 60 is the S pole, and the rear core 70 is the N pole.
The rear core 70, the permanent magnet 80, and the front core 60 are fixed to the cam cylinder 30 with an adhesive or the like after being fitted in the cam cylinder 30 in this order.

2 to 4, the stator 90 includes a yoke 91 having substantially the same rectangular outer contour as the fixed frame 20 and the cover 40, an exciting coil 95, and both ends of the conductive wire forming the coil 95. A connection terminal 99 and the like that are electrically connected are provided.
The yoke 91 is formed by laminating a plate made of a magnetic material such as a silicon steel plate into a predetermined shape, and is formed so as to surround the cam cylinder 30 (the front core 60 and the rear core 70). Has been. Further, the yoke 91 defines the outer contour of the apparatus in cooperation with the cover 40 (and the fixed frame 20). That is, the side surface of the yoke 91 is exposed to the outside. Thereby, the heat generated by the stepping motor can be efficiently released to the outside through the yoke 91.
Further, the yoke 91 includes a plurality of (four) facing portions 92 facing the front core 60 and the rear core 70 in spaces formed at the four corners inside thereof.

  The facing portion 92 is formed in a substantially arc shape, is formed integrally with the yoke 91 via the connecting portion 93, and includes a plurality of teeth 92 a facing the teeth 61 and 71 of the front core 60 and the rear core 70. Yes. The teeth 92 a are formed at the same pitch as the pitch of the teeth 61 and 71 of the front core 60 and the rear core 70. Further, as shown in FIG. 4, the four opposing portions 92 have a relative position of the teeth 92a of the front core 60 and the rear core 70 with respect to the teeth 61 and 71 in a quarter of the pitch in the circumferential direction. Are arranged so as to be shifted by an angle α / 4 corresponding to. For example, among the four facing portions 92A to 92D, when the tooth 92a of the facing portion 92A faces the tooth 61 at the center position, the tooth 92a of the facing portion 92B is disposed between the tooth 61 and the tooth 71. The teeth 92a of the facing portion 92C face the teeth 71 at the central position, and the teeth 92a of the facing portion 92D are disposed between the teeth 71 and 61. By setting the relative positions of the teeth 61 and 71 and the teeth 92a in this way, the front core 60 and the rear core 70 can be rotated every angle α / 4 as described later.

  The coil 95 is formed of a conductive wire (not shown) such as a copper wire wound around the outer periphery of the connecting portion 93, and both ends of the conductive wire are electrically connected to connection terminals 99 disposed at the four corners of the yoke 91. Connected. The connection terminal 99 is connected to a power supply circuit of a device such as a mobile phone in which the lens driving device is installed. The coil 95 is excited by being energized through the connection terminal 99.

  In the lens driving device described above, the stator 90 is positioned and fixed from the front with respect to the fixed frame 20, and the cam cylinder 30 to which the front core 60, the rear core 70 and the permanent magnet 80 are fixed is attached to the support portion 21 of the fixed frame 20. The lens frame 10 is inserted from the front, the lens frame 10 is inserted into the support portion 21 from the front, the spring 50 is disposed on the front surface of the lens frame 10, and the cover 40 is coupled from the front of the fixed frame 10. As described above, since the lens driving device can be assembled from one direction (front) of the optical axis direction L, the number of assembling steps can be greatly reduced.

Next, a driving method of the lens driving device will be described with reference to FIGS.
First, as shown in FIG. 5, a pulsed positive drive voltage is applied to the coil 95A, and a pulsed negative drive voltage is applied to the coil 95B disposed opposite the coil 95A across the optical axis. (Timing 1).
Thus, the facing portions 92A and 92B are excited to the N and S poles, respectively, and attract the front core 60 and the rear core 70 having the S and N pole polarities by the magnetic attractive force. Thereby, as shown in FIG. 6, the teeth 61 and 71 of the front core 60 and the rear core 70 are opposed to the teeth 92a of the facing portions 92A and 92B. In this state, it is assumed that the reference position G1 of the front core 60 coincides with the reference position G2 of the facing portion 92A.

  Next, when energization of the coils 95A and 95B is stopped, and when a positive drive voltage and a negative drive voltage are applied to the coils 95C and 95D, respectively (timing 2), as shown in FIG. 92D is excited to the N pole and the S pole, respectively, and attracts the front core 60 and the rear core 70 by the magnetic attractive force. As a result, the cam cylinder 30 (the front core 60 and the rear core 70) rotates by an angle α / 4 in the R1 direction.

  Next, when the energization of the coils 95C and 95D is stopped and a negative drive voltage and a positive drive voltage are applied to the coils 95A and 95B (timing 3), respectively, as shown in FIG. 92B is excited to the south pole and the north pole, respectively, and attracts the front core 60 and the rear core 70 by the magnetic attractive force. Thereby, the cam cylinder 30 (the front core 60 and the rear core 70) further rotates by an angle α / 4 in the R1 direction (rotation of the angle α / 2 from the reference position).

  Next, when the energization to the coils 95A and 95B is stopped and a negative drive voltage and a positive drive voltage are applied to the coils 95C and 95D (timing 4), as shown in FIG. The 92D is excited to the S pole and the N pole, respectively, and attracts the front core 60 and the rear core 70 by a magnetic attractive force. As a result, the cam cylinder 30 (the front core 60 and the rear core 70) further rotates by an angle α / 4 in the R1 direction (rotation of an angle 3α / 4 from the reference position).

  When the cam cylinder 30 is rotated as described above, the lens frame 10 receives the cam action by the cam 31 and moves in the optical axis direction L. Therefore, when the cam cylinder 30 is rotated by a desired amount of rotation, the lens frame 10 can be positioned at a focusing position where the focal point of the lens G matches the imaging surface of the CCD 100.

  On the other hand, the front core 60 and the rear core 70 are magnetized to the S pole and the N pole by the permanent magnet 80. For this reason, in a state where energization of each coil 95 is stopped, a magnetic attractive force acts between the facing portion 92 and the front core 60 and the rear core 70, and the cam cylinder 30 is held at a fixed rotational position. Is done. As a result, after the lens frame 10 is positioned at the in-focus position, the lens frame 10 can be held at the in-focus position even if the energization to the coil 95 is stopped.

As described above, in this embodiment, the front core 60, the rear core 70, and the permanent magnet 80 as the rotor of the stepping motor are directly provided on the cam cylinder 30, so that the rotational force is transmitted to the cam cylinder 30. It is not necessary to use a transmission mechanism such as a gear train, so that the configuration of the apparatus can be simplified, the apparatus can be reduced in size and weight, and the structure is resistant to impact.
Further, according to the present embodiment, since the permanent magnet 80 is used for the rotor and the yoke 91 is used for the stator 90, the rotational position of the cam cylinder 30 is maintained even when the coil 95 is de-energized. be able to.
Further, according to the present embodiment, the opposing portion 92, the coil 95, and the connection terminal 99 can be integrated by arranging them in the space formed in the corner inside the yoke 91 formed in a rectangular shape. The device can be miniaturized.
Further, according to the present embodiment, the positioning resolution of the cam barrel 30 is an angle α / 4 corresponding to a quarter of the pitch of the teeth 61, 71, 92a of the front core 60, the rear core 70, and the facing portion 92. Therefore, more precise positioning of the lens frame 10, that is, more precise focus adjustment is possible.

In the above-described embodiment, the case where the lens driving device is used for the focus adjustment of the lens has been described.
Moreover, although the case where the four opposing parts 92 of the stator 90 were provided was demonstrated in the said embodiment, it is not limited to this, It is also possible to provide two or six or more.
In the above embodiment, the so-called hybrid type stepping motor has been described. However, the present invention is not limited to this, and any stepping motor that can directly connect the rotor to the cam cylinder 30 may be used. It is also possible to employ a stepping motor of this type.
In the above embodiment, the case where the permanent magnet 80 is magnetized so that the front side in the optical axis direction L is the S pole and the rear side is the N pole has been described, but the front side is the N pole and the rear side is the S pole. It is also possible to magnetize in this way.

  As described above, the lens driving device of the present invention is applied as a lens driving device for a digital camera unit mounted on a portable information terminal or the like that is required to be reduced in size and weight, such as a mobile phone and a portable personal computer. Needless to say, the present invention is useful in other lens optical systems as long as the lens needs to be driven.

1 is an external perspective view of an embodiment of a lens driving device according to the present invention. It is sectional drawing of the orthogonal | vertical direction of an apparatus. It is a disassembled perspective view of an apparatus. It is a front view of the state which removed the cover of the apparatus. It is a timing chart which shows the timing which drives a stepping motor. It is a figure which shows the rotation state in the timing of 1 of FIG. It is a figure which shows the rotation state in the timing of 2 of FIG. It is a figure which shows the rotation state in the timing of 3 of FIG. It is a figure which shows the rotation state in the timing of 4 of FIG.

Explanation of symbols

L ... Optical axis direction G ... Lens 10 ... Lens frame 11 ... Projection piece 20 ... Fixed frame 25 ... Positioning pin 26 ... Stopping claw 30 ... Cam cylinder 31 ... Cam 40 ... Cover 50 ... Spring 60 ... Front core (rotor, stepping) motor)
60a ... Inner peripheral surface 60b ... Fitting part 61 ... Teeth 70 ... Rear core (rotor, stepping motor)
70a ... inner peripheral surface 70b ... fitting part 71 ... tooth 80 ... permanent magnet (rotor, stepping motor)
90 ... Stator (Stepping motor)
91 ... Yoke (stator)
92 ... Opposite part (yoke)
92a ... Teeth 93 ... Connection part (yoke)
95 ... Coil (Excitation coil)
100 ... CCD

Claims (7)

A lens frame that holds the lens; a fixed frame that supports the lens frame so as to be movable in the optical axis direction; and the cam frame that is rotatably supported by the fixed frame and rotates in the optical axis direction. An annular cam cylinder that affects the above, and a stepping motor that rotates the cam cylinder,
The stepping motor includes a rotor held by the cam cylinder, and a stator that generates a magnetic force that is held by the fixed frame and rotates the rotor by energization.
A lens driving device. The rotor has an annular permanent magnet, and an annular core disposed in contact with the permanent magnet,
The stator includes a yoke having a plurality of facing portions facing the core, and an exciting coil wound around a connecting portion between the facing portion and the yoke.
The lens driving device according to claim 1. The yoke is formed to have a rectangular shape and surround the cam cylinder,
The opposed portion and the exciting coil are provided at corners of the yoke,
The lens driving device according to claim 2. The permanent magnet is magnetized in the optical axis direction,
The core includes a front core and a rear core that are arranged corresponding to each magnetic pole of the permanent magnet and have the same number of teeth formed at the same pitch,
The teeth of the front core and the rear core are arranged so as to be shifted from each other by an angle corresponding to half of the pitch,
The plurality of facing portions are formed at the same pitch as the teeth of the front core and the rear core, and the relative positions of the front core and the rear core with respect to the teeth are a quarter of the pitch in the circumferential direction. Having a plurality of teeth arranged to deviate by a corresponding angle;
The lens driving device according to claim 2 or 3, wherein The fixed frame includes a base that holds the image sensor, and a cylindrical support that extends in the optical axis direction from the base.
The cam cylinder is rotatably supported on the outer peripheral surface of the support portion and slidably supported on the front surface of the base portion,
The lens frame has a protruding piece that is inserted into a guide groove formed in the support portion so as to extend in the optical axis direction and that engages with a cam formed on a front end surface of the cam cylinder, Is supported so as to be movable in the direction of the optical axis.
The lens driving device according to claim 1, wherein the lens driving device is a lens driving device. A cover having an opening that allows subject light to pass through is coupled to the fixed frame.
The cover is interposed between the lens frame and receives one end of a spring that urges the lens frame toward the fixed frame, and holds the stator in cooperation with the fixed frame.
The lens driving device according to claim 1, wherein the lens driving device is a lens driving device. The yoke is formed to define an outer contour in cooperation with the cover.
The lens driving device according to claim 6.

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