JP4606804B2 - LENS DRIVE DEVICE AND IMAGING DEVICE - Google Patents

Description

  The present invention relates to a lens driving device and an imaging device in an electronic camera (digital camera) or the like, and in particular, a compact retractable electronic camera in which a lens is housed in a camera body when not photographing and the lens protrudes toward a subject only when photographing. The present invention relates to a lens driving device and an imaging device having a structure for making the device thin.

  Unlike a camera using a film, an electronic camera (digital camera) has an increase in the size of the device itself despite the increase in the number of pixels such as a CCD (charge coupled device) used as an imaging device. Therefore, miniaturization and thinning are progressing. To reduce the size and thickness of the camera, the lens is housed in the camera body when not shooting, and the lens is protruded toward the subject only when shooting. The lens diameter regulates the thickness of the camera. The length of the lens system is such that the axis is the camera's height direction and the height direction is pointed at the subject when shooting, or the optical axis is bent at a right angle with a prism or reflecting mirror so that the thickness direction can be pointed at the subject. A method that does not change the value has been put into practical use.

  Among these, in the retractable camera, the thickness of the camera is regulated by the thickness of the lens system. That is, in order to obtain a certain resolving power, it is necessary to use a plurality of lenses, and the thickness of the camera cannot be reduced below the thickness of the lens to be used. Also, when a cam ring is used for projecting the lens system to the front of the camera during shooting, autofocus, zooming, etc., the cam ring height may exceed the lens system thickness. It also affects the camera thickness.

  That is, as schematically shown in FIG. 7, for example, a single-focus lens 90 without zooming is retracted, and a pin 92 protruding from the lens barrel 91 is provided with a cam groove 93 shown in FIG. The position at which the focal point at the photographing position is at infinity from the collapsed state (the pin 92a shown in FIG. 7B and FIG. 7A) by the rotation of the cam ring 94 (the cylindrical cam ring developed in a plane). (Pin 92b shown in FIGS. 7C and 7A) is moved to a state where autofocus is performed and the closest position is in focus (pins shown in FIGS. 7D and 7A). 92c), the height of the cam groove 93 in the optical axis direction may be as high as the lens barrel 91. In order to move the cam pin 92 accurately, the cam groove of the cam ring 94 is required. 93 on both sides of the optical axis Become necessary margin L La, the height of the cam ring 94 becomes greater than the thickness of the lens.

  The cam pin 92 used for the movement of the lens system has conventionally been a taper pin as shown by 95 in FIG. 8 in relation to the lens feeding position accuracy. The cam ring having the cam groove 96 requires a certain thickness so that the cam ring does not fall off when an impact is applied, and the cam ring becomes so large that it becomes a factor that hinders downsizing of the camera. . Helicoids were also used to move the lens barrel in these small cameras, but the angle can be changed if there is a need to change the angle of the cam for lens extension and autofocus, for example. There was no problem.

  In order to deal with these problems, for example, Patent Document 1 discloses a zoom lens zooming mechanism. However, in order to reduce the thickness of the moving frame for moving the lens group and to make it compact, it is formed on the inner diameter of the moving frame. A zoom lens barrel is shown in which the cam groove and the helicoid screw have substantially the same groove depth.

  Patent Document 2 also relates to a zoom lens barrel, but provides a zoom lens barrel that facilitates the adjustment of the cam pin and the cam groove and increases the mechanical strength of the cam frame and the cam pin. Therefore, a zoom lens barrel is shown in which a coil spring is provided in the barrel so that the cam pin can be pressed against the cam groove.

JP-A-9-152542 JP 2004-151279 A

  An object of the present invention is to provide a lens driving device and an imaging device having a structure for miniaturizing an electronic camera or the like provided with a retractable lens.

In order to solve the above problems, a lens driving device according to the present invention provides:
A lens frame that houses at least one lens;
A cammed member provided on the outer periphery of the lens frame;
A lens frame housing member provided at an outer peripheral position of the lens frame and substantially concentric with the lens frame;
A cam member provided between the lens frame housing member and the lens frame;
A guide portion for guiding the cammed member provided in the lens frame housing member;
Urging means for urging the cammed member toward the imaging side,
The cam member includes a first cam portion in a range corresponding to the extension region of the lens frame, and a second cam in a range corresponding to the autofocus region of the lens frame continuously with the first cam portion. And the slope of the first cam portion with respect to the surface perpendicular to the optical axis is steeper than the slope of the second cam portion with respect to the surface perpendicular to the optical axis ,
The lens frame is movable in a substantially optical axis direction by being driven by the first cam portion or the second cam portion while the cam member is guided by the guide portion.
The biasing means applies a biasing force without contacting the cammed member within a range corresponding to the extension region of the lens frame where the cammed member is driven by the first cam portion. In the range corresponding to the autofocus area of the lens frame in which the cam member is driven by the second cam portion and does not bias, the cam member contacts the cam member and biases the biasing force. It is comprised as follows.
In order to solve the above problems, an imaging apparatus according to the present invention
An imaging device comprising a lens, an imaging device, and a lens driving device,
The lens driving device includes a lens frame that houses at least one lens, a cammed member provided on an outer periphery of the lens frame, an outer peripheral position of the lens frame, and substantially concentric with the lens frame. A lens frame storage member, a cam member provided between the lens frame storage member and the lens frame, a first cam portion on the imaging side and a first cam portion on the subject side provided on the cam member. Two cam portions, a guide portion that guides the cam member provided in the lens frame housing member, and a biasing means that biases the cam member,
The cam member includes a first cam portion in a range corresponding to the extension region of the lens frame, and a second cam in a range corresponding to the autofocus region of the lens frame continuously with the first cam portion. And the slope of the first cam portion with respect to the surface perpendicular to the optical axis is steeper than the slope of the second cam portion with respect to the surface perpendicular to the optical axis ,
The lens frame is movable in a substantially optical axis direction by being driven by the first cam portion or the second cam portion while the cam member is guided by the guide portion.
The biasing means applies a biasing force without contacting the cammed member within a range corresponding to the extension region of the lens frame where the cammed member is driven by the first cam portion. In the range corresponding to the autofocus area of the lens frame in which the cam member is driven by the second cam portion and does not bias, the cam member contacts the cam member and biases the biasing force. It is comprised as follows.

  By configuring the lens driving device and the imaging device in this way, in the second cam portion on the subject side of the cam member, the urging means urges the camped member toward the imaging side. The cam member is free from rattling and the cam member only needs to have a contact surface of the cam member only on the imaging side, and the object side is unnecessary, so that the optical axis of the cam member The direction length can be shortened.

  The urging means is disposed outside the lens frame housing member, and the urging means is disposed on the outer periphery of the lens frame housing member. In addition, an imaging device can be provided.

Further, in the preferred embodiment of the present invention, the biasing means uses a coil spring or a leaf spring.
Further, the first or second cam portion formed continuously of the cam member has a groove shape, and a part of the groove portion is opened so that the pin-shaped cam member can be introduced. It is good to be.

  Further, the gradient of the first cam portion with respect to the optical axis is steeper than the gradient of the second cam portion, and the first cam portion is an extension region of the lens frame, and the second cam portion By setting the cam portion to the auto focus area, the lens can be quickly extended when the lens is extended, and fine focusing can be performed with a gentle inclination with respect to the auto focus. The first cam portion is not biased while the portion is biased toward the imaging side by the biasing means, and the cam members are driven substantially the same even if the inclination is different. Can be done with torque.

The cam member of the lens frame is inserted into the first or second cam portion of the cam member and the guide portion of the lens frame storage member, and an end portion of the cam member is the lens frame. Projecting to the outside of the storage member, and the biasing means is disposed so as to be able to be biased by abutting the protruding camped member on the outside of the lens frame storage member,
The lens frame moves in a substantially optical axis direction by moving in the optical axis direction by the first or second cam portion while the cammed portion is guided by the guide portion of the lens frame housing member, and The biasing means and the cammed member are abutted and biased in a driving range in which the cammed portion is driven by the second cam portion.

  In this way, by projecting the end of the cam member to the outside of the lens frame housing member, the cam member will not drop out even if an impact such as dropping the camera is applied, so that the lens can be reliably removed. It is possible to provide a lens driving device that can perform feeding and focusing.

As described above, according to the present invention, an imaging apparatus such as a camera provided with a retractable lens can be reduced in size, and the special effects described in the paragraph [0014] can be obtained .

  Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Not too much.

  1 to 4 are diagrams for explaining an outline of an example of an electronic camera including a lens driving device and an imaging device according to the present invention. FIG. 1 illustrates the electronic camera 10 in a non-photographing state on the front side (subject side). 2 is a perspective view showing the electronic camera 10 from the back side, FIG. 3 is a view of the electronic camera 10 viewed from the front side, and FIG. 4 is a view of the electronic camera 10 viewed from the back side. .

  The illustrated electronic camera 10 has an imaging device body 11, and an imaging lens body 21 (see FIG. 3) is mounted on the front surface (front surface: subject) side of the imaging device body 11. The imaging lens body 21 constitutes a part of a lens unit. Although not shown, the lens unit further includes a shutter mechanism and a CCD (charge coupled device).

  Further, a slide cover portion 12 is attached to the imaging device main body 11, and the slide cover portion 12 is supported by the imaging device main body 11 so as to be slidable in a direction indicated by a solid line arrow in FIG. 12, the imaging lens body 21 is protected during non-shooting. That is, the slide cover unit 12 is slidable between a first position that covers the imaging lens body 21 and a second position that exposes the imaging lens body 21.

  The slide cover part 12 includes a front part (lens cover part) 12a located on the front side, a right side part 12b located on the right side when viewed from the front side, and a back part (display part cover part) located on the back side. 12c, and is slidably disposed on the imaging device body 11 such that the imaging device body 11 is sandwiched between the front surface portion 12a and the back surface portion 12c. In the illustrated example, the strobe light emitting portion 13 is formed from the front surface portion 12a to the right side surface portion 12b, that is, over two surfaces (on the end side in the direction in which the slide cover portion 12 opens, and at least the front surface of the slide cover portion 12 and A strobe light emitting portion is formed on the side surface continuous with the front surface), and light is emitted from the strobe light emitting portion 13 during flash photography. In the above-described example, the imaging device 16 is configured by the imaging device body 11, the imaging lens body 21, and the slide cover unit 12.

  As shown in FIG. 2, a display unit (for example, a liquid crystal display) 14 is disposed on the back surface of the imaging apparatus main body 11, and an operation unit 15 is disposed. The operation unit 15 includes, for example, a release button, A mode dial and various function keys are provided. When the slide cover portion 12 is positioned at the first position described above, a part of the liquid crystal display 14 is covered by the back surface portion 12c (the back surface portion 12c covers the entire liquid crystal display 14). However, it is sufficient to cover at least a part of the liquid crystal display 14).

  Referring to FIGS. 3 and 4, when photographing with electronic camera 10, slide cover portion 12 is slid from the first position to the second position. Thereby, as shown in FIG. 3, the imaging lens body 21 is exposed, the main power supply is turned on, and the liquid crystal display 14 is brightened. At this time, as shown in FIG. 4, the back surface portion 12 c of the slide cover portion 12 slides, and the entire liquid crystal display 14 is exposed. Further, the strobe light emitting unit 13 is moved further outward than the mounting position of the imaging lens body 21 by the slide of the slide cover 12, so that the imaging lens body 21 and the strobe light emitting unit 13 can be used for strobe shooting. The distance is increased, and the red-eye phenomenon can be prevented.

  As shown in FIG. 3, the shutter button 22 is disposed on one end portion side of the upper surface of the imaging apparatus main body 11, and the slide cover portion 12 is in the end portion direction opposite to the one end portion side where the shutter button 22 is disposed. Slide to. As a result, when the electronic camera 10 is held with both hands for shooting, the slide cover unit 12 can be slid with a hand different from the hand that operates the shutter button.

  When performing strobe shooting, the operation unit 15 turns on the strobe shooting mode and sets various shooting modes, an image playback mode, a flash waiting time, and the like. Examples of the various shooting modes include “normal shooting”, “continuous shooting”, “fine shooting”, “still image”, and “moving image”, and the image reproduction mode includes “still image” and “moving image”. And so on. When the image reproduction mode is set, the photographed image is reproduced and displayed on the liquid crystal screen 14 after photographing. These various shooting modes, image reproduction modes, flash waiting times, and the like are called operation modes, and the microprocessor (control means and power-on means: not shown) housed in the imaging apparatus main body 11 is in accordance with the operation mode. It is possible to control the light emission from the strobe light emitting unit 13 such as changing the intensity and color of the light or blinking.

  The shutter mechanism described above has, for example, an autofocus (AF) mechanism, a diaphragm mechanism, a filter mechanism, and the like, and controls exposure at the time of release. An optical image of a subject or the like incident from the imaging lens body 21 is formed on the CCD, and the optical image is converted into an electrical signal. The output signal (electrical signal) from the CCD is sampled at a predetermined sampling frequency by the microprocessor and converted into a digital value (digital image data). The digital image data is divided into a color difference component and a luminance component, for example, JPEG. (Joint Photographic Experts Group) compliant processing such as orthogonal transformation and Huffman encoding / decoding for image compression / decompression is performed. The image data compressed in this way is temporarily stored in the memory.

  That is, in the illustrated electronic camera, an image captured by the CCD is displayed in real time on the liquid crystal display 14 before the release button or shutter button 22 is pressed, and the liquid crystal display 14 electronically confirms the imaging field of view. The electronic viewfinder function is provided, and the image is taken by operating the release button or the like while observing the electronic viewfinder. At this time, if necessary, the strobe light emitting unit 13 is caused to emit light and image data obtained by imaging is displayed on the liquid crystal display 14 as an imaging result at any time when a reproduction operation is performed using a function key.

  In this way, digital image data before and during imaging is displayed in real time on the liquid crystal display 14 and functions as an electronic viewfinder. Further, the digital image data after imaging and the recorded image data decompressed and restored are stored. Is displayed. The liquid crystal display 14 displays a mode display such as the operating state of the electronic camera. Note that a battery is used as a power supply unit of the electronic camera, and a Ni-Cd (nickel cadmium) battery, a nickel hydrogen battery, a lithium battery, or the like is used as the battery.

  In the illustrated electronic camera, the strobe light emitting unit 13 is formed over at least one side continuous from the front surface (subject side surface) of the imaging device 16 to the front surface. Light can be emitted from the light emitting unit 13, and the light emission state of the strobe light emitting unit 13 can be easily visually recognized not only from the subject side but also from the photographer side.

  In addition, here, the strobe light emitting unit 13 is disposed on the slide cover unit (lens cover) 12 that protects the imaging lens body 21, and the front surface of the slide cover unit 12 and the end of the slide cover unit 12 in the direction of opening. Since the strobe light emitting unit 13 is formed at least on the side surface continuous with the front surface, when the image pickup lens body 21 is exposed by sliding the slide cover 12, the distance between the strobe light emitting unit 13 and the image pickup lens body 21. Therefore, the red-eye phenomenon that occurs during flash photography can be reduced.

  Furthermore, the slide cover portion 12 has a front portion and a back portion, and when the imaging lens body 21 is covered by the front portion, at least a part of the liquid crystal display 14 is covered by the back portion. During non-photographing, the imaging lens body 21 is protected by the slide cover 12 and the liquid crystal display 14 is also protected. When the slide cover portion 12 is slid to expose the imaging lens body 21, the main power supply is turned on, and the slide cover portion 12 is slid together with this, and the imaging lens body 21 is moved by the slide cover portion 12. Since the power supply is turned off when covered, the use operation matches the on / off state of the main power supply, and the power supply is never forgotten.

  In addition, the shutter button 22 is arranged on one end side of the upper surface of the image pickup apparatus main body, and the slide cover unit 12 is slid in the direction opposite to the one end side where the shutter button 22 is arranged. Therefore, when the electronic camera 10 is gripped with both hands for shooting, the slide cover portion 12 can be slid with a hand different from the hand (finger) that operates the shutter button 22, and the operability is improved. Will be.

  Next, a lens driving device and an imaging device according to an embodiment of the present invention will be described in detail with reference to FIGS. An imaging lens body 21 incorporated in a lens driving device according to an embodiment of the present invention is a single-focus lens that allows a plurality of lenses to move as an example. The retractable type is housed in the imaging device main body 11 and protrudes during photographing. 5A is a perspective view of a lens body 21 incorporating a lens driving device in a state in which a cam ring and a linear ring are incorporated, FIG. 5B is a perspective view showing the cam ring taken from the linear ring, and FIG. FIG. 4 is a perspective view of only a lens frame 50 that accommodates and integrates a plurality of lenses 51 as viewed from the rear side on the imaging side. FIG. 6 is a schematic diagram for explaining the movement of the cam pins provided on the cam ring, linear ring and lens frame.

  The taking lens body 21 constituting the lens driving device includes a lens frame 50 that integrally holds a plurality of lenses 51 as shown in FIG. 5, and a periphery of the lens frame 50 as shown in FIG. The cam ring 53 is a cam member provided on the cam ring 53 and the linear ring 52 is a lens frame housing member provided around the cam ring 53 as shown in FIG. Although not shown on the lower side, a CCD or the like as an image sensor is disposed.

  In the lens frame 50, cam pins 54 using parallel pins, which are camped members screwed into screw holes 55 provided in the lens frame 50, are planted at three locations so as to be equally spaced, as shown in FIG. When the cam ring 53 shown in B) is rotated by the rotational force transmitted to the rotation transmission groove 57, it can be moved in the direction of the optical axis by cam grooves 56 and 63 provided in three places. The steeply inclined cam groove 56 which is the first cam portion is a lens feeding cam groove for changing the imaging lens body 21 from the non-shooting state to the shooting state, and is a gentle slope which is the second cam portion. The cam groove 63 is an autofocus cam groove. In the present invention, the cam ring 53 has a portion with no upper portion in the drawing in order to suppress the height of the cam ring 53 in the optical axis direction. .

  On the other hand, the linear ring 52 is provided with a linear groove 62 as a guide portion so that the cam pin 54 moves only in the optical axis direction. Therefore, the cam pin 54 passes through the cam grooves 56 and 63 and the linear groove 62. The end portion protrudes to the outside of the linear ring 52, and is guided by the linear groove 62 so that the linear movement can be performed only while the movement range in the optical axis direction is limited. In addition, when the cam pin 54 moving in the linear groove 62 reaches the cam groove 63 in the cam ring 53, the coil portion is held by the pin 58 provided in the linear ring 52 in order to press the cam pin 54 against the imaging side. In addition, a leaf spring 59 is provided which has one end locked by a pin 60 and the other end locked by a pin 61. In the following description, the case where the leaf spring 59 is used will be described as an example, but it is needless to say that a spring can be used.

  Next, the operation of this lens driving device will be described with reference to FIG. 6. FIG. 6A shows the cam ring 53 in the imaging lens body 21 having the lens driving device shown in FIG. FIG. 6B also shows the linear groove 62 and the leaf spring in the linear ring 52 so that the relationship between the leaf spring 59 and the movement of the cam pin 54 moved by the cam grooves 56 and 63 in the cam ring 53 can be clearly shown. Only the pin 58 for holding the coil portion at 59, the pin 60 for locking one end and the other end, and the pin 61 are shown.

  6C, 6D, and 6E show that the imaging lens body 21 can be photographed from the state (C) in which the imaging lens body 21 is housed in the imaging device body 11 of the electronic camera 10 when not photographing. The movement of the cam ring 53, cam pin 54, and leaf spring 59 in the linear ring 52 centered on the linear groove 62 in each of the state (D) where the lens has reached the position and the state (E) where the imaging lens body 21 has reached the closest photographing position During this time, the rotation of the motor (not shown) is transmitted to the rotation transmission groove 57 shown in FIG. 5B, and the cam ring 53 moves in the direction of the arrow 64 to move the cam pin 54.

  First, FIG. 6C shows a state in which the imaging lens body 21 is not housed in the imaging device body 11 of the electronic camera 10, and the cam pin 54 is positioned at the lowermost end of the linear groove 62, and the leaf spring One end of 59 is attached to the pin 61. When the slide cover portion 12 is slid to the photographing state in this state as described above, the rotation of the motor (not shown) is transmitted to the rotation transmission groove 57 shown in FIG. The cam pin 54 is moved in the direction.

  As described above, the cam groove 56 is a cam groove for extending the lens for changing the imaging lens body 21 from the non-photographing state to the photographing state, and the cam pin 54 is located at the position shown in FIG. When it reaches the end of the cam groove 63 with a slanted inclination, the imaging lens body 21 becomes a shootable position and is focused at infinity. At this time, the leaf spring 59 whose one end is on the pin 61 comes into contact with the cam pin 54.

  When a distance measuring device (not shown) measures the distance from the camera to the subject, it is given to a motor (not shown) as a position signal in the cam groove 63 of the cam ring 53, and the rotation of the motor is transmitted to rotate. Transmitted to the groove 57, the cam ring 53 is further rotated in the direction of the arrow 64, and the cam pin 54 moves upward (subject side) in the figure. At this time, one end of the leaf spring 59 is applied to the cam pin 54 and urges the cam pin 54 toward the cam groove 63. Since the cam groove 63 has a gentle inclination, the driving torque of a motor (not shown) is not shown. Is not significantly different from when the cam pin 54 is moved by the cam groove 56.

  When the camera and the subject are at the closest distance that can be handled by the camera, the cam pin 54 moves to the position shown in FIG. 6E and stops there. At this time, there is nothing above the cam pin 54 in the figure of the cam groove 63, but the cam pin 54 is firmly pressed by one end of the leaf spring 59, so that it will not come off or the imaging lens body 21 will be loose. Absent. Further, when one end of the leaf spring 59 is applied to the cam pin 54 even at the cam groove 56 having a steep slope, a space for installing the spring is required, but only the gently sloping cam groove 63 is used. By using it, such a space becomes unnecessary. Furthermore, since a parallel pin is used as the cam pin 54 and protrudes to the outside of the linear ring 52, the cam pin 54 does not come off even when an impact is applied.

  By configuring the lens driving device in this way, the length of the cam member in the optical axis direction can be shortened, so it is optimal for configuring a small and thin electronic camera and there is no rattling of the lens frame. In addition, it is possible to provide a lens driving device and an imaging device that are excellent in assemblability.

  According to the present invention, it is possible to provide a small and thin lens driving device and an imaging device. Therefore, the electronic camera can be configured to be small and thin.

It is the perspective view which showed the non-photographing state from the front side (object side) in an example electronic camera provided with the lens drive device and imaging device of this invention. It is the perspective view which showed the non-photographing state from the back side in an example electronic camera provided with the lens drive device and imaging device of this invention. It is the perspective view which looked at the time of imaging | photography in the example electronic camera provided with the lens drive device and imaging device of this invention from the front side (subject side). It is the perspective view which looked at the time of imaging | photography in the example electronic camera provided with the lens drive device and imaging device of this invention from the back side. (A) is a perspective view showing a state in which a cam ring and a linear ring are incorporated in a lens body 21 incorporating a lens driving device of the present invention, (B) is a perspective view showing a cam ring by taking a linear ring, and (C). It is the perspective view which looked at only the lens body from the back used as the camera side. (A) to (E) are schematic views for explaining the movement of cam pins provided on the cam ring, linear ring and lens frame. (A) to (D) are diagrams for explaining a conventional lens driving device. It is an example of the taper pin and cam groove which are used for the conventional lens drive device.

Explanation of symbols

50 Lens frame 51 Lens 52 Linear ring 53 Cam ring 54 Cam pin 55 Screw hole 56, 63 Cam groove 57 Rotation transmission groove 58 Pin 59 Leaf spring 60 Pin 61 Pin 62 Linear groove

Claims (7)

A lens frame that houses at least one lens;
A cammed member provided on the outer periphery of the lens frame;
A lens frame housing member provided at an outer peripheral position of the lens frame and substantially concentric with the lens frame;
A cam member provided between the lens frame housing member and the lens frame;
A guide portion for guiding the cammed member provided in the lens frame housing member;
Urging means for urging the cammed member toward the imaging side,
The cam member includes a first cam portion in a range corresponding to the extension region of the lens frame, and a second cam in a range corresponding to the autofocus region of the lens frame continuously with the first cam portion. And the slope of the first cam portion with respect to the surface perpendicular to the optical axis is steeper than the slope of the second cam portion with respect to the surface perpendicular to the optical axis ,
The lens frame is movable in a substantially optical axis direction by being driven by the first cam portion or the second cam portion while the cam member is guided by the guide portion.
The biasing means applies a biasing force without contacting the cammed member within a range corresponding to the extension region of the lens frame where the cammed member is driven by the first cam portion. In the range corresponding to the autofocus area of the lens frame in which the cam member is driven by the second cam portion and does not bias, the cam member contacts the cam member and biases the biasing force. A lens driving device configured as described above.   The lens driving apparatus according to claim 1, wherein the urging unit is disposed outside the lens frame housing member.   The lens driving device according to claim 1, wherein the urging unit is disposed on an outer periphery of the lens frame housing member.   The lens driving device according to claim 1, wherein the urging unit is a coil spring or a leaf spring. The cam member of the lens frame is inserted into the first or second cam portion of the cam member and the guide portion of the lens frame storage member, and an end portion of the cam member is the lens frame storage member. And the biasing means is disposed so as to be biased in contact with the protruding camped member on the outside of the lens frame housing member,
The lens frame moves in a substantially optical axis direction by moving in the optical axis direction by the first or second cam part while the cammed part is guided by a guide part of the lens frame housing part, and 2. The lens driving device according to claim 1, wherein the urging means and the cam member are abutted and urged in a driving range in which the cam portion is driven by the second cam portion. . An imaging device comprising a lens, an imaging device, and a lens driving device,
The lens driving device includes a lens frame that houses at least one lens, a cammed member provided on an outer periphery of the lens frame, an outer peripheral position of the lens frame, and substantially concentric with the lens frame. A lens frame storage member, a cam member provided between the lens frame storage member and the lens frame, a first cam portion on the imaging side and a first cam portion on the subject side provided on the cam member. Two cam portions, a guide portion that guides the cam member provided in the lens frame housing member, and a biasing means that biases the cam member,
The cam member includes a first cam portion in a range corresponding to the extension region of the lens frame, and a second cam in a range corresponding to the autofocus region of the lens frame continuously with the first cam portion. And the slope of the first cam portion with respect to the surface perpendicular to the optical axis is steeper than the slope of the second cam portion with respect to the surface perpendicular to the optical axis ,
The lens frame is movable in a substantially optical axis direction by being driven by the first cam portion or the second cam portion while the cam member is guided by the guide portion.
The biasing means applies a biasing force without contacting the cammed member within a range corresponding to the extension region of the lens frame where the cammed member is driven by the first cam portion. In the range corresponding to the autofocus area of the lens frame in which the cam member is driven by the second cam portion and does not bias, the cam member contacts the cam member and biases the biasing force. An image pickup apparatus configured as described above.   The continuously formed first or second cam portion of the cam member has a groove shape, and a part of the groove portion is opened so that the pin-shaped cam member can be introduced. Item 7. The lens driving device according to Item 1 or 6.

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