JP5681961B2 - Image sensor unit - Google Patents

Description

  The present invention relates to an image sensor unit.

In recent years, digital cameras that use an image sensor such as a charge coupled device (CCD) or a complementary metal-oxide semiconductor (CMOS) sensor to convert an optical image into an electrical signal and digitize and record the electrical signal have become widespread. .
In such a digital camera, there is a demand not only for increasing the number of pixels of a CCD or CMOS sensor, but also for a lens barrel that forms an optical image on those image sensors. Specifically, there is a demand for a lens barrel equipped with a zoom lens system with higher magnification.
On the other hand, in the field of digital cameras, there is a demand for miniaturization of the main body in order to improve portability. For this reason, there is a demand for downsizing of the lens barrel, which is considered to contribute greatly to downsizing of the main body.

  Therefore, conventionally various lens barrel has been proposed (e.g., see Patent Documents 1 to 5).

JP-7-191249 discloses JP 2002-277709 JP JP 2005-234259 JP JP 2008-185786 JP JP 2004-85932 JP

In a conventional image sensor unit, an optical element such as IR absorption glass is provided on the subject side of the image sensor, and an annular light shielding member is sandwiched between the optical element and the image sensor. In this state, the image sensor is fixed to the base plate.
However, in the conventional configuration, there is a space through which dust can pass around the optical element, the imaging element, and the light shielding member. It flows in.
The subject of this invention is providing the image pick-up element unit which can improve a dustproof effect.

An image pickup device unit according to an aspect of the present invention includes a base plate having an opening, an image pickup device that converts light passing through the opening into an electrical signal, a fixed plate that supports the image pickup device and is fixed to the base plate, a light shielding sheet, It has. The light shielding sheet includes an annular first light shielding part provided on the light receiving surface side of the imaging element, and a second light shielding part arranged outside the first light shielding part and having an outer shape larger than the opening, and the second light shielding part Is in contact with the base plate.
In this image sensor unit, since the outer shape of the second light shielding part of the light shielding sheet is larger than the opening of the base plate, the second light shielding part prevents dust entering from the image sensor side of the base plate from flowing to the opposite side through the opening. And the dustproof effect can be enhanced.

  The image sensor unit according to the present invention can enhance the dustproof effect.

Schematic perspective view of digital camera Schematic perspective view of digital camera (A) and (B) schematic perspective view of lens barrel Exploded perspective view of the lens barrel Exploded perspective view of the lens barrel Exploded perspective view of the lens barrel Exploded perspective view of the lens barrel Schematic cross-sectional view of the lens barrel (retracted position) Schematic cross-sectional view of the lens barrel (the wide angle position) Schematic cross-sectional view of the lens barrel (telephoto position) (A) and (B) perspective view of lens barrel (A) and (B) perspective view of lens barrel (A) and (B) perspective view of lens barrel (A) and (B) a perspective view of the drive frame Perspective view of the camera cam frame and the rotary cam frame (A) camera cam frame and a side view of the rotary cam frame, plan view of (B) camera cam frame and the rotary cam frame Perspective view of the first lens frame and the rotation cam frame (A) a perspective view of the first lens frame, (B) a perspective view of the rotary cam frame Side view of the rotary cam frame (A) expansion of the rotary cam frame view (outer circumferential surface), (B) exploded view of the rotary cam frame (inner peripheral surface) Exploded perspective view of lens barrier, first lens frame and rotating cam frame (A) and (B) a perspective view of the first lens frame and the first linear frame Plan view of the first lens frame and the first linear frame (A) a cross-sectional view around the first cam pins, (B) a cross-sectional view of the periphery of the second cam pin (A) and (B) a perspective view of the fixed frame, the camera cam frame, first linear frame and a second rectilinear frame Plan view of the fixed frame, the camera cam frame, first linear frame and a second rectilinear frame (A) and (B) a second lens frame, side view of a second rectilinear frame and the third lens frame (A) a perspective view of a third lens frame, (B) a perspective view of the third lens frame (not correction lens frame) (A) and (B) a perspective view of a correction lens frame Side view of the compensation lens frame Perspective view of the image sensor unit Cross-sectional view of the imaging device unit (A) a plan view of the periphery of the CCD image sensor, (B) a perspective view of the light shielding sheet, (C) a side view of the periphery of the CCD image sensor 141 Exploded perspective view of the camera cam frame and the imaging device unit A perspective view of the lens barrel (the first rectilinear frame is omitted) Sectional view around the second cam pin Sectional view of the peripheral light shielding ring (A) and (B) a second lens frame, side view of a second rectilinear frame and the third lens frame (Other embodiments)

[1: Overview of digital camera]
The digital camera 1 will be described with reference to FIGS. 1 and 2 are schematic perspective views of the digital camera 1. FIG. FIG. 1 shows a case where the lens barrel 3 is in a photographing state (wide angle end).
The digital camera 1 is a camera for acquiring an image of a subject. The digital camera 1 is equipped with a multistage retractable lens barrel 3 for high magnification and miniaturization.
In the following description, the six surfaces of the digital camera 1 are defined as follows.
The surface facing the subject side when taking a picture with the digital camera 1 is the front surface, and the opposite surface is the back surface. Up and down vertical direction of the subject and rectangular image captured by the digital camera 1 (generally, aspect ratio (ratio of long side to short side) is 3: 2, 4: 3, 16: 9, etc.) When photographing is performed so as to coincide with each other, a surface facing upward in the vertical direction is defined as a top surface, and a surface on the opposite side is defined as a bottom surface. Further, when shooting is performed so that the vertical direction of the subject and the vertical direction of the rectangular image captured by the digital camera 1 coincide with each other, the left side when viewed from the subject side is the left side, and vice versa. The side surface is the right side surface. The above definition does not limit the usage posture of the digital camera 1.

According to the above definition, FIG. 1 is a perspective view showing the front surface, the top surface, and the right side surface.
Note that not only the six surfaces of the digital camera 1 but also the six surfaces of each component arranged in the digital camera 1 are defined in the same manner. In other words, the above definition is applied to the six surfaces of each component member arranged in the digital camera 1.
In addition, as shown in FIG. 1, a three-dimensional orthogonal coordinate system having a Y axis parallel to an optical axis A of an optical system O (described later) is defined. According to this definition, the direction from the back side to the front side along the optical axis A is the Y axis positive direction, and the direction orthogonal to the optical axis A and from the right side to the left side is the X axis positive direction. Yes, the direction perpendicular to the X-axis and Y-axis and from the bottom surface side to the top surface side is the Z-axis positive direction.
Hereinafter, in each drawing, it demonstrates on the basis of this XYZ coordinate system. That is, the X-axis positive direction, the Y-axis positive direction, and the Z-axis positive direction in each drawing indicate the same direction.

[2: Overall configuration of digital camera]
As shown in FIGS. 1 and 2, the digital camera 1 mainly includes an exterior portion 2 that accommodates each unit, an optical system O that forms an optical image of a subject, and a lens mirror that movably supports the optical system O. And a tube 3.
The optical system O is composed of a plurality of lens groups, and the plurality of lens groups are arranged in a state aligned in the Y-axis direction. The lens barrel 3 is a multi-stage collapsible type (specifically, a three-stage collapsible type in which three types of frames are drawn out from the reference fixed frame 20 (described later) in the Y-axis direction), and is supported by the exterior portion 2. ing. The plurality of lens groups are supported by the lens barrel 3 so as to be relatively movable in the Y-axis direction. Details of the configuration of the optical system O and the lens barrel 3 will be described later.
The exterior unit 2 includes a CCD image sensor 141 (an example of an image sensor) that performs photoelectric conversion on an optical image, and an image recording unit 9 that records an image acquired by the CCD image sensor 141. . As shown in FIG. 2, a liquid crystal monitor 8 that displays an image acquired by the CCD image sensor 141 is provided on the back surface of the exterior portion 2.

A release button 4, an operation dial 5, a power switch 6, and a zoom adjustment lever 7 are provided on the upper surface of the exterior portion 2. The release button 4 is a button for the user to operate the exposure timing. The operation dial 5 is a dial for the user to make various settings regarding the shooting operation. The power switch 6 is a switch for the user to turn on and off the digital camera 1. The zoom adjustment lever 7 is a lever for the user to adjust the zoom magnification, and is rotatable within a predetermined angle range around the release button 4.
[3: Configuration of optical system and lens barrel]
The overall configuration of the lens barrel 3 will be described with reference to FIGS. FIG. 3 is a schematic perspective view of the lens barrel 3, and FIGS. 4 to 7 are exploded perspective views of the lens barrel 3. 3A is a schematic perspective view of the lens barrel 3 when retracted, and FIG. 3B is a schematic perspective view of the lens barrel 3 when photographing. 8 to 9 are schematic sectional views of the lens barrel 3. 8 is a sectional view of the retracted position, FIG. 9 is a sectional view at the wide-angle end, and FIG. 10 is a sectional view at the telephoto end.

As shown in FIGS. 8 to 10, the optical system O includes a first lens group G1, a second lens group G2, a third lens group G3, and a fourth lens group G4. The first lens group G1 is, for example, a lens group having a positive power as a whole, and takes in light from the subject. The second lens group G2 is a lens group having negative power as a whole, for example. The zoom magnification of the optical system O can be adjusted by the first lens group G1 and the second lens group G2. The third lens group G3 is a lens group for suppressing the movement of the optical image with respect to the CCD image sensor 141 caused by the movement of the digital camera 1, for example. The fourth lens group G4 is a lens group for adjusting the focal point, for example. The optical system O is supported by the lens barrel 3 so as to be relatively movable in the Y-axis direction.
As shown in FIG. 3, the lens barrel 3 mainly includes a fixed frame 20 (an example of a first frame) fixed to the exterior portion 2, a zoom motor 110 as a drive source fixed to the fixed frame 20, A master flange 10 (an example of a base member, an example of a base plate) that houses each frame between the fixed frame 20, a drive frame 30 (an example of a fourth frame) to which the driving force of the zoom motor 110 is input, A camera cam frame 40 (an example of a third frame) supported by the fixed frame 20 so as to be movable in the Y-axis direction; a rotating cam frame 70 (an example of a cam frame, an example of a second frame) that rotates together with the drive frame 30; A second rectilinear frame 80 that moves in the Y-axis direction without rotating with respect to the fixed frame 20 and a shutter unit 95 are provided. The drive frame 30 and the rotating cam frame 70 are rotatable with respect to the fixed frame 20 and movable in the Y-axis direction, but other members move in the Y-axis direction without rotating with respect to the fixed frame 20. A CCD image sensor 141 is attached to the master flange 10. An example of the zoom motor 110 is a DC motor.

The lens barrel 3 further supports a first lens frame 60 (an example of a lens frame) that supports the first lens group G1, a second lens frame 190 that supports the second lens group G2, and a third lens group G3. And a fourth lens frame 90 that supports the fourth lens group G4.
(3.1: Fixed frame)
The fixed frame 20 is a member for supporting the drive frame 30 so as to be rotatable around the optical axis A and movable in the Y-axis direction (straight direction), and constitutes a stationary side member of the lens barrel 3 together with the master flange 10. doing. The fixed frame 20 is fixed to the master flange 10 with screws, for example. The fixed frame 20 mainly includes a substantially cylindrical fixed frame main body 21 that constitutes a main portion, and a drive gear 22 (see FIG. 11) that is rotatably supported by the fixed frame main body 21. As shown in FIGS. 4 and 5, a light shielding sheet 150 is provided on the positive side of the fixed frame 20 in the Y-axis direction.

The fixed frame main body 21 is fixed to the master flange 10, and the drive frame 30 is disposed on the inner peripheral side. The drive gear 22 is a member for transmitting the driving force of the zoom motor 110 to the drive frame 30 and meshes with a gear (not shown) of the zoom motor 110.
Three inclined grooves 23, three rotation grooves 25, and three rectilinear grooves 27 a, 27 b, 27 c are formed on the inner peripheral side of the fixed frame main body 21. The inclined groove 23 and the rotating groove 25 are grooves for guiding the drive frame 30. The rectilinear grooves 27a, 27b, and 27c are grooves for guiding the camera cam frame 40 in the Y-axis direction, and rectilinear protrusions 46a, 46b, and 46c (see FIG. 5) described later are inserted therein.
Cam pins 34 (described later) of the drive frame 30 are inserted into the inclined grooves 23 and are arranged at substantially equal pitches in the circumferential direction. The rotation groove 25 guides the cam pin 34 in the rotation direction. The rotating groove 25 forms substantially one guide groove with the inclined groove 23. The inclined groove 23 is used during the retraction operation, and the rotation groove 25 is used during the zoom operation.

(3.2: Drive frame)
The drive frame 30 is a member for supporting the camera cam frame 40 so as to be rotatable about the optical axis A and integrally movable in the Y-axis direction, and is disposed on the inner peripheral side of the fixed frame 20. A rotational driving force is input to the driving frame 30 from the zoom motor 110, and the driving force is transmitted to other members via the driving frame 30.
The drive frame 30 mainly includes a substantially cylindrical drive frame main body 31 (an example of a fourth frame main body) disposed on the inner peripheral side of the fixed frame main body 21 and a gear portion formed on the outer peripheral side of the drive frame main body 31. 32 (see FIG. 12) and three cam pins 34 formed on the outer peripheral side of the drive frame main body 31. The drive frame main body 31 is disposed between the fixed frame 20 and the rotating cam frame 70 (described later) in the radial direction. A decorative ring 160 is attached to the end of the drive frame main body 31 on the positive side in the Y-axis direction. A light shielding ring 161 is sandwiched between the decorative ring 160 and the drive frame main body 31.

The gear portion 32 meshes with the drive gear 22 of the fixed frame 20. As a result, the driving force of the zoom motor 110 is transmitted to the drive frame 30 via the drive gear 22. The three cam pins 34 are arranged at an equal pitch in the circumferential direction. The cam pin 34 is fitted in the inclined groove 23 of the fixed frame 20. As a result, the drive frame 30 moves in the Y-axis direction while rotating around the optical axis A with respect to the fixed frame 20, and when the cam pin 34 is guided to the rotation groove 25, the drive frame 30 moves relative to the fixed frame 20. It rotates without moving in the Y-axis direction.
A first rotation groove 36, a second rotation groove 37, three introduction grooves 35, and three rectilinear grooves 38 are formed on the inner peripheral side of the drive frame main body 31. The first rotation groove 36 guides a first rotation protrusion 43 (described later) of the camera cam frame 40 in the rotation direction. The second rotation groove 37 (see FIG. 5) is arranged on the Y axis direction negative side of the first rotation groove 36 and guides a second rotation protrusion 45 (described later) of the camera cam frame 40 in the rotation direction. The introduction groove 35 is a groove for guiding the first rotation protrusion 43 and the second rotation protrusion 45 to the first rotation groove 36 and the second rotation groove 37, and is connected to the first rotation groove 36 and the second rotation groove 37. Yes. The three introduction grooves 35 are arranged at equal pitches in the circumferential direction and extend in the Y-axis direction. The rectilinear groove 38 (see FIG. 5) is a groove for guiding a cam pin 76 (described later) of the rotating cam frame 70, and an end portion of the cam pin 76 is inserted therein. The rectilinear grooves 38 are disposed between the circumferential directions of the introduction grooves 35. The three rectilinear grooves 38 are arranged at an equal pitch in the circumferential direction.

The drive frame 30 is driven around the optical axis A (R1 direction, R2 direction, and rotation direction) by the driving force of the zoom motor 110. For example, when shifting from the retracted state to the photographing state, the drive frame 30 is driven in the R1 direction by the zoom motor 110. As a result, the cam pin 34 moves along the inclined groove 23 of the fixed frame 20. Thereby, the drive frame 30 moves to the Y axis direction positive side while rotating with respect to the fixed frame 20.
When the drive frame 30 is further driven in the R1 direction, the cam pin 34 reaches the rotation groove 25, and the cam pin 34 moves in the rotation direction along the rotation groove 25. Accordingly, the drive frame 30 rotates without moving in the Y axis direction with respect to the fixed frame 20. That is, the drive frame 30 rotates without moving in the Y-axis direction with respect to the fixed frame 20 when the rotation angle of the drive frame 30 reaches a predetermined angle.

In the present embodiment, the drive frame 30 moves in the Y axis direction while rotating with respect to the fixed frame 20 during the retracting operation, and the drive frame 30 moves in the Y axis direction with respect to the fixed frame 20 during the zoom operation. Rotate without moving to.
Further, when shifting from the photographing state to the retracted state, the drive frame 30 is driven in the R2 direction by the zoom motor 110. As a result, the cam pin 34 of the drive frame 30 moves along the rotating groove 25 and moves along the inclined groove 23 when reaching the inclined groove 23. Thereby, the drive frame 30 moves to the Y axis direction negative side while rotating with respect to the fixed frame 20, and the drive frame 30 is accommodated on the inner peripheral side of the fixed frame 20.
(3.3: Camera cam frame)
As shown in FIGS. 5, 13, 15, and 16, the camera cam frame 40 is a member for restricting the rotation of the first rectilinear frame 100 and the second rectilinear frame 80 with respect to the fixed frame 20. (See FIG. 13). The camera cam frame 40 mainly includes a substantially cylindrical camera cam frame main body 41 (an example of a third frame main body) that constitutes a main part, and three through cam grooves 42 (an example of a through groove) formed in the camera cam frame main body 41. ) And three rectilinear protrusions 46 a to 46 c formed on the outer peripheral side of the camera cam frame main body 41, and three flange portions 44.

The camera cam frame body 41 is disposed between the fixed frame 20 and the rotating cam frame 70 (described later) in the radial direction. The three through cam grooves 42 are arranged at an equal pitch in the circumferential direction. The cam pin 76 of the rotating cam frame 70 penetrates the through cam groove 42 in the radial direction.
The three rectilinear protrusions 46a to 46c protrude radially outward from the Y-axis direction negative end of the camera cam frame body 41, and are arranged at substantially equal pitches in the circumferential direction. The rectilinear protrusions 46a to 46c are inserted into the rectilinear grooves 27a, 27b and 27c of the fixed frame 20, and are guided in the Y-axis direction by the rectilinear grooves 27a to 27c. The camera cam frame 40 can move in the Y-axis direction without rotating with respect to the fixed frame 20 by the rectilinear protrusions 46 a to 46 c and the rectilinear grooves 27 a to 27 c.
Connection terminal portions 18 and 19 are provided on the surface of the master flange 10 opposite to the fixed frame 20. The connection terminal portions 18 and 19 protrude from the master flange 10. A flexible printed circuit board is electrically connected to the connection terminal portions 18 and 19 by soldering or the like. As shown in FIG. 34, the rectilinear protrusions 46a to 46c are arranged at positions different from the connection terminal portions 18 and 19 (positions that do not overlap each other) when viewed from the Y-axis direction.

The flange portion 44 connects two adjacent rectilinear protrusions 46a and 46b, two adjacent rectilinear protrusions 46b and 46c, and two adjacent rectilinear protrusions 46c and 46a in the circumferential direction. The flange portion 44 forms an annular portion that protrudes radially outward from the camera cam frame main body 41 together with the rectilinear protrusions 46a to 46c. The rectilinear protrusions 46 a to 46 c protrude outward in the radial direction from the flange portion 44. The flange portion 44 increases the strength of the entire camera cam frame 40. Further, the rectilinear protrusions 46a to 46c protrude on the Y axis direction negative side (image plane side) from the flange portion 44 (see FIGS. 16A and 34).
As shown in FIGS. 15 and 16B, the camera cam frame 40 has insertion openings 42a to 42c arranged at positions corresponding to the rectilinear protrusions 46a to 46c. The insertion ports 42 a to 42 c are openings arranged in communication with the penetrating cam groove 42, and spread outward in the radial direction from the cam pin 76. Further, the circumferential dimension of the rectilinear protrusions 46a to 46c is larger than the circumferential dimension of the insertion openings 42a to 42c.

Furthermore, three first rotation protrusions 43 and three second rotation protrusions 45 are formed on the outer peripheral side of the camera cam frame body 41. The first rotation protrusion 43 and the second rotation protrusion 45 are positioning protrusions, and are guided in the rotation direction by the first rotation groove 36 and the second rotation groove 37 of the drive frame 30. Thereby, the camera cam frame 40 rotates with respect to the drive frame 30 as necessary while moving integrally with the drive frame 30 in the Y-axis direction.
When the drive frame 30 rotates with respect to the fixed frame 20, the drive frame 30 moves in the Y axis direction with respect to the fixed frame 20. At this time, the camera cam frame 40 moves in the Y-axis direction with respect to the fixed frame 20 together with the drive frame 30 without rotating with respect to the fixed frame 20 (that is, while rotating with respect to the drive frame 30) (see FIG. 13). ).
(3.4: First lens frame)
As shown in FIGS. 17, 18A, and 19, the first lens frame 60 (an example of a lens frame) is a member for supporting the first lens group G1, and is on the inner peripheral side of the camera cam frame 40. Is arranged. Specifically, the first lens frame 60 mainly includes a first lens frame main body 61 (an example of a lens frame main body) and a flange portion 62 to which the first lens group G1 (an example of a lens element) is fixed. Have. The flange portion 62 is provided at the end of the first lens frame main body 61 on the Y axis direction positive side. The flange portion 62 is formed with three first openings 67a (an example of a through hole) and three second openings 67b penetrating in the Y-axis direction. As shown in FIG. 21, an opening / closing lever 53 (described later) of the lens barrier 50 and a protrusion 78 of the rotating cam frame 70 are inserted into the first opening 67a so as to be movable in the rotational direction when retracted. A lens barrier 50 is fixed on the Y axis direction positive side of the first lens frame 60. As shown in FIG. 6, the lens barrier 50 and the first lens frame 60 are covered with a decorative ring 180. Further, three notches 66 (an example of a second notch) are formed at the end of the first lens frame body 61 on the Y axis direction negative side. As shown in FIG. 17, the notch 66 is formed so as to avoid a portion where the cam pin 76 of the rotating cam frame 70 is fixed when retracted.

As shown in FIGS. 17, 18 </ b> A, and 19, three first rectilinear pins 63 and three second rectilinear pins 64 are provided on the outer peripheral side of the first lens frame body 61. . Three first cam pins 68 (an example of a cam member) and three second cam pins 69 (an example of a protruding portion) are provided on the inner peripheral side of the first lens frame main body 61.
The second rectilinear pin 64 is guided in the Y-axis direction by a first rectilinear groove 107 of a first rectilinear frame 100 (described later). The first rectilinear pin 63 is inserted into the second rectilinear groove 108 of the first rectilinear frame 100. Thereby, the first lens frame 60 moves in the Y-axis direction without rotating with respect to the first rectilinear frame 100. In other words, the rotation of the first lens frame 60 with respect to the fixed frame 20 is restricted by the first rectilinear frame 100 via the camera cam frame 40, and the first lens frame 60 rotates with respect to the fixed frame 20 by the first rectilinear frame 100 and the camera cam frame 40. It is supported so as to be movable in the Y-axis direction without any problems.

As shown in FIGS. 22A, 22B, and 23, the first cam pins 68 are mainly positioning pins, and the second cam pins 69 are mainly reinforcing pins. The first cam pin 68 is guided by a first cam groove 72 (described later) of the rotating cam frame 70. The second cam pin 69 is inserted into a second cam groove 73 (described later) of the rotating cam frame 70 via a gap.
Thus, the first lens frame 60 is supported by the rotating cam frame 70 so as to be movable in the Y-axis direction while rotating with respect to the rotating cam frame 70.
<3.4.1: Configuration of First Linear Pin 63, Second Linear Pin 64, First Cam Pin 68, and Second Cam Pin 69>
Here, the first rectilinear pin 63, the second rectilinear pin 64, the first cam pin 68, and the second cam pin 69 will be described. As shown in FIGS. 22A, 22B, and 23, the first cam pin 68 is arranged on the first lens frame body 61 on the substantially opposite side of the first rectilinear pin 63 in the radial direction. Yes. The second cam pin 69 is disposed on the first lens frame main body 61 on the substantially opposite side of the second rectilinear pin 64 in the radial direction. Adjacent first rectilinear pins 63 and second rectilinear pins 64 are arranged between adjacent first cam pins 68 and second cam pins 69. The first rectilinear pin 63 and the second rectilinear pin 64 are integrally formed with the first lens frame main body 61 and project outward from the first lens frame main body 61 in the radial direction. The first cam pin 68 and the second cam pin 69 are formed integrally with the first lens frame main body 61 and project radially inward from the first lens frame main body 61.

  The first cam groove 72 and the second cam groove 73 of the rotating cam frame 70 have the same shape, but the first cam pin 68 and the second cam pin 69 differ in the amount of protrusion from the first lens frame body 61. Specifically, as shown in FIGS. 24A and 24B, the first cam pin 68 and the second cam pin 69 have the same tapered portions 68a and 69a, but the base cylindrical portion 68b and the length of the 69b is different. Therefore, the first cam pin 68 projecting radially inward by a dimension T than the second cam pins 69. Therefore, although the first cam pin 68 is in contact with the first cam groove 72, a gap S1 is secured between the rotation direction and the radial direction of the second cam pin 69 and the second cam groove 73, and thus, basically a, a second cam pins 69 and the second cam groove 73 are not in contact. Since the gap S1 is very small, the second cam pin 69 and the second cam groove 73 can contact each other when the first lens frame body 61 or the rotating cam frame 70 is elastically deformed.

  Further, FIG. 24 (A) and (B), the first cam pin 68 and the first cam groove 72 has a tapered shape. Specifically, when an external force such as an impact when dropping acts on the lens barrel 3, the first cam pin 68 and the first cam groove 72 act between the first lens frame 60 and the rotating cam frame 70. at least some of the axial force, and the first lens frame 60 from the rotary cam frame 70 has a force to convertible tapered shape to be Hanaso radially. For example, when the first cam pin 68 is pressed against the first cam groove 72 by an external force in the Y-axis direction, the first cam pin 68 tends to come out of the first cam groove 72 along the tapered surface. At this time, a force F1 (see FIG. 23) that faces the outer side in the radial direction acts on the periphery of the first cam pin 68 on the first lens frame body 61, and the first cam pin 68 contacts the cam frame body 71. A force directed inward in the radial direction is applied to the existing portion. Therefore, the periphery of the first cam pin 68 of the first lens frame body 61 is elastically deformed so as to move outward in the radial direction, and the periphery of the first cam pin 68 of the cam frame body 71 is elastically deformed so as to move inward in the radial direction. to.

On the other hand, when the first lens frame main body 61 and the cam frame main body 71 are elastically deformed as described above, the periphery of the second cam pin 69 of the first lens frame main body 61 is elastically deformed so as to move inward in the radial direction. The periphery of the second cam pin 69 of the main body 71 is elastically deformed so as to move outward in the radial direction. As a result, the second cam pin 69 is pushed into the second cam groove 73. Further, the first lens frame 60 is elastically deformed by an external force in the Y-axis direction, and the second cam pin 69 is pressed against the second cam groove 73 in the Y-axis direction.
However, the second cam pin 69 and the second cam groove 73 use at least a part of the external force in the Y-axis direction acting between the first lens frame 60 and the rotating cam frame 70, and the first lens frame 60 as the rotating cam frame 70. It has a taper shape that can be converted to a force that is going to be separated in the radial direction. For example, as described above, when the second cam pin 69 is pushed into the second cam groove 73, the force F2 (see FIG. 23) in the direction in which the second cam pin 69 tries to escape from the second cam groove 73 is tapered. Occur. As a result, the first lens frame body 61 is subjected to a radially outward force on the periphery of the second cam pin 69, and the cam frame body 71 is radially inward at the portion where the second cam pin 69 is in contact. The force that faces is applied. For this reason, the force transmitted from the first cam pin 68 and these forces are well balanced, and uneven deformation of the first lens frame 60 and the rotating cam frame 70 can be suppressed.

As described above, the positioning of the first lens frame 60 with respect to the camera cam frame 40 is basically performed only by the first cam pins 68 and the first cam grooves 72. However, for example, when the user drops the digital camera 1, an impact can be received by the second cam pin 69 in addition to the first cam pin 68. For this reason, the impact at the time of dropping can be distributed to the first cam pin 68 and the second cam pin 69, and damage to the first cam pin 68 and the second cam pin 69 can be prevented. Further, by providing the second cam pin 69 and the second cam groove 73, when a large external force is applied to the lens barrel 3, the first cam pin 68 and the second cam pin 69 are connected to the first cam groove 72 and the first cam groove 72 of the cam frame 70, respectively. 2 can be prevented from falling off the cam groove 73.
The first cam pin 68 and the second cam pin 69 also have a feature in the circumferential arrangement. Specifically, as shown in FIG. 23, the three first cam pins 68 are arranged at an equal pitch in the circumferential direction, and the three second cam pins 69 are arranged at an equal pitch in the circumferential direction. . In contrast, the first cam pins 68 and the second cam pins 69 are arranged at unequal pitches in the circumferential direction.

The first cam pin 68 is disposed at a position closer to the second cam pin 69 on the rotation direction R1 side than the second cam pin 69 on the rotation direction R2 side. An angle θ1 between the first cam pin 68 and the second cam pin 69 on the rotation direction R2 side is smaller than an angle θ2 between the first cam pin 68 and the second cam pin 69 on the rotation direction R1 side. Regarding the relationship between the angles θ1 and θ2, the same relationship holds true for the first rectilinear pin 63 and the second rectilinear pin 64.
Thus, since the first cam pins 68 and the second cam pins 69 are arranged at unequal pitches in the circumferential direction, it is possible to prevent the first lens frame 60 from being assembled in the wrong orientation with respect to the rotating cam frame 70. . The pitch reference is, for example, the center of each pin in the circumferential direction.
(3.5: Rotating cam frame)
As shown in FIGS. 17, 18B, and 19, the rotating cam frame 70 moves the first lens frame 60, the second lens frame 190, the third lens frame 200, and the fourth lens frame 90 in the Y-axis direction. It is a member that is movably supported, and is disposed on the inner peripheral side of the fixed frame 20 and on the inner peripheral side of the first lens frame 60. Specifically, as shown in FIGS. 6 and 12, the rotating cam frame 70 mainly includes a substantially cylindrical cam frame main body 71 (an example of a second frame main body), three projecting portions 78, and three cutouts. A notch 79 (an example of a first notch), three cam pins 76 (an example of a guide member) provided on the outer peripheral side of the cam frame main body 71, an annular flange 77, and three rotating protrusions 75, have. The three cam pins 76 are arranged at an equal pitch in the circumferential direction.

As shown in FIGS. 18B, 19, and 21, the protrusion 78 is disposed at the end of the cam frame main body 71 on the Y axis direction positive side and protrudes from the cam frame main body 71 to the Y axis direction positive side. ing. The notch 79 is disposed between the three protrusions 78 and is recessed on the Y axis direction negative side. It can be said that the notch 79 is formed by the protrusion 78. The protrusion 78 is provided so that it can be inserted into the first opening 67a of the first lens frame 60 when retracted.
One of the three protrusions 78 functions as a drive protrusion for pushing the opening / closing lever 53 (described later) of the lens barrier 50 in the rotation direction, and is disposed on the rotation direction R1 side of the opening / closing lever 53. One of the three notches 79 is a portion in which the opening / closing lever 53 is accommodated in the Y-axis direction, and is disposed on the rotation direction R2 side of the projection 78 that functions as a drive projection.
The flange portion 77 is provided at the end on the Y axis direction negative side of the cam frame main body 71, and includes a flange main body 77a, a cylindrical portion 77b, and a stopper 77c (FIGS. 8 to 10). reference). The flange main body 77a protrudes radially outward from the cam frame main body 71. The cylindrical portion 77b is disposed on the outer peripheral portion of the flange main body 77a and protrudes from the flange main body 77a to the Y axis direction negative side. The stopper 77c protrudes radially inward from the cylindrical portion 77b. The stopper 77c is a part for integrally attaching the second rectilinear frame 80 to the rotating cam frame 70, and a plurality of rotating projections 81a of the second rectilinear frame 80 (described later) are hooked (FIG. 12B). FIG. 8 to FIG. 10).

Further, as shown in FIGS. 17, 18 </ b> B, and 19, the rotation protrusion 75 protrudes radially outward from the cam frame main body 71, and is disposed at substantially the same circumferential position as the cam pin 76. . The rotation protrusions 75 are arranged at equal pitches in the circumferential direction, and are inserted into the rotation grooves 105 of the first rectilinear frame 100 (see FIG. 8). Since the rotation protrusion 75 is inserted into the rotation groove 105, the rotation cam frame 70 moves integrally with the first rectilinear frame 100 in the Y-axis direction. Since the rotating cam frame 70 and the first rectilinear frame 100 do not rotate with respect to the fixed frame 20, the rotating cam frame 70 does not rotate with respect to the first rectilinear frame 100 and is integrated with the first rectilinear frame 100 in the Y-axis direction. Moving.
Since the tip end portion of the cam pin 76 is inserted into the rectilinear groove 38 (see FIG. 14B) of the drive frame 30, the rotating cam frame 70 is rotated with the drive frame 30 while rotating together with the drive frame 30. It can move in the axial direction. Further, since the cam pin 76 penetrates the through cam groove 42 of the camera cam frame 40, when the drive frame 30 and the camera cam frame 40 rotate relative to each other, the rotation cam frame 70 and the camera cam frame 40 rotate relative to each other. At this time, the cam pin 76 moves along the through cam groove 42, and as a result, the rotating cam frame 70 rotates with the drive frame 30, and in the Y-axis direction with respect to the drive frame 30 according to the shape of the through cam groove 42. Move to.

With the above configuration, the rotary cam frame 70 rotates integrally with the drive frame 30 and can move in the Y-axis direction with respect to the drive frame 30. That is, the rotating cam frame 70 can move in the Y-axis direction while rotating with respect to the fixed frame 20. The amount of movement of the rotating cam frame 70 in the Y-axis direction is the sum of the amount of movement of the drive frame 30 relative to the fixed frame 20 in the Y-axis direction and the amount of movement of the rotating cam frame 70 relative to the drive frame 30 in the Y-axis direction. .
As described above, since the first lens frame 60 is supported by the rotating cam frame 70, the amount of movement of the first lens frame 60 in the Y-axis direction relative to the fixed frame 20 is the Y-axis of the rotating cam frame 70. In addition to the amount of movement in the direction, the amount of movement of the first lens frame 60 relative to the rotating cam frame 70 in the Y-axis direction is added. Therefore, it is possible to reduce the size of the lens barrel 3 while ensuring the zoom magnification.
<3.5.1: Configuration of the first cam groove 72 and the second cam groove 73>
As shown in FIGS. 19 and 20A, on the outer peripheral side of the cam frame main body 71, three first cam grooves 72 (an example of cam grooves) and three second cam grooves 73 (an auxiliary groove) are provided. An example) is formed. The first cam groove 72 has a first cam pin 68 inserted therein, and supports the first lens frame 60 so as to be movable with respect to the cam frame main body 71. The second cam groove 73 is a reinforcing cam groove mainly, and a second cam pin 69 is inserted therein. The three first cam grooves 72 are arranged at an equal pitch in the circumferential direction, and the three second cam grooves 73 are arranged at an equal pitch in the circumferential direction. The shape of the second cam groove 73 is substantially the same as the shape of the first cam groove 72, but the first cam groove 72 is different in that a stepped portion 73a is formed around the end 73b of the second cam groove 73. The shape is different.

The first cam groove 72 is formed in the cam frame main body 71 and the protrusion 78. Specifically, as shown in FIG. 19 and FIG. 20A, an introduction groove 72 a of the first cam groove 72 is formed in the protrusion 78. As shown in FIG. 20A, when the lens barrel 3 is in the telephoto position, wide-angle position, and retracted position, the first cam pin 68 is in the telephoto position Pt1, wide-angle position Pw1, and retracted position in the first cam groove 72, respectively. It is located at Pr1.
On the other hand, as shown in FIG. 20A, when the lens barrel 3 is in the telephoto position, wide-angle position, and retracted position, the second cam pin 69 is in the telephoto position Pt2, wide-angle position Pw2 in the second cam groove 73, and It is located at the retracted position Pr2. A notch 79 is formed around the end of the second cam groove 73 on the positive side in the Y-axis direction (around the telephoto position Pt2). For this reason, the second cam groove 73 has an auxiliary insertion port 73f that is disposed between two adjacent protrusions 78 and is open to the side from which the protrusion 78 protrudes. It can be said that a part of the second cam groove 73 is notched by the notch 79, and as a result, the auxiliary insertion port 73f is formed. Since the second cam groove 73 extends in the circumferential direction around the auxiliary insertion port 73f, the dimension of the auxiliary insertion port 73f in the circumferential direction is larger than the width of the second cam groove 73. The circumferential dimension of the auxiliary insertion port 73 f is larger than the width of the introduction groove 72 a of the first cam groove 72.

The stepped portion 73a can contact the tip end portion of the second cam pin 69 guided by the second cam groove 73 in the rotation direction. The height of the stepped portion 73a is set so that the tip portion of the second cam pin 69 can get over the stepped portion 73a when the first lens frame 60 and the rotating cam frame 70 rotate relative to each other. When the second cam pin 69 gets over the stepped portion 73a, the movement of the second cam pin 69 between the end portion 73b of the second cam groove 73 and the stepped portion 73a is restricted. That is, the first lens frame 60 and the rotating cam frame 70 are substantially integrated members. When a predetermined rotational force is applied between the first lens frame 60 and the rotating cam frame 70, the second cam pin 69 gets over the stepped portion 73a, and relative rotation between the first lens frame 60 and the rotating cam frame 70 occurs. Permissible.
In this way, the locking mechanism for the first lens frame 60 and the rotating cam frame 70 is realized by the second cam pin 69 and the stepped portion 73a.

In addition, the groove | channel between the level | step-difference part 73a and the edge part 73b is used only at the time of an assembly | attachment, and is not used at the time of the lens barrel 3 retracting operation | movement and zooming operation | movement.
Further, as shown in FIGS. 18, 19, 20 (A), 21, and 36, the rotating cam frame 70 includes a first contact portion 73 c that forms an edge of the second cam groove 73, and a second And a second contact portion 73 d that forms the bottom of the cam groove 73. The first contact portion 73c is arranged so as to face the second cam pin 69 with a gap in the Y-axis direction with the optical system O in the telephoto end state (that is, at the telephoto position Pt2 shown in FIG. 20A). (See FIG. 36). The first contact portion 73 c has a tapered shape complementary to the second cam pin 69, and has an inclined surface 73 e that faces the second cam pin 69. The second contact portion 73d forms the bottom portion of the second cam groove 73 and is disposed so as to face the second cam pin 69 via a gap in the radial direction.

<3.5.2: Configuration of the third cam groove 74a and the fourth cam groove 74b>
As shown in FIGS. 18B, 20B, and 21, on the inner peripheral side of the cam frame main body 71, three third cam grooves 74a, three fourth cam grooves 74b, Is formed. The three third cam grooves 74a are grooves for guiding cam pins 192 (described later) of the second lens frame 190, and are arranged at equal pitches in the circumferential direction. The fourth cam grooves 74b are grooves for guiding cam pins 229 (described later) of the base frame 220 constituting the third lens frame 200, and are arranged at equal pitches in the circumferential direction.
As shown in FIG. 20B, when the lens barrel 3 is in the telephoto position, wide-angle position, and retracted position, the cam pins 192 are at the telephoto position Pt3, wide-angle position Pw3, and retracted position Pr3 in the first cam groove 72, respectively. positioned. When the lens barrel 3 is at the telephoto position, the wide-angle position, and the retracted position, the cam pin 229 is located at the telephoto position Pt4, the wide-angle position Pw4, and the retracted position Pr4, respectively.

With these configurations, the amount of movement of the second lens frame 190 relative to the fixed frame 20 in the Y-axis direction is equal to the amount of movement of the rotating cam frame 70 in the Y-axis direction, and further the second lens frame 190 relative to the rotating cam frame 70. The amount of movement in the Y-axis direction is added.
Further, the amount of movement of the third lens frame 200 in the Y-axis direction relative to the fixed frame 20 is equal to the amount of movement of the rotating cam frame 70 in the Y-axis direction, and further the Y-axis direction of the third lens frame 200 relative to the rotating cam frame 70. The amount of movement to is added.
<3.5.3: Configuration of the protrusion 78>
Further, as shown in FIG. 18B, FIG. 19 and FIG. 21, at the end of the cam frame main body 71 on the Y axis direction positive side, there are three projections 78 extending from the cam frame main body 71 in the Y axis direction. A notch 79 disposed between the three protrusions 78 is formed. One of the three protrusions 78 functions as a drive protrusion for pushing the opening / closing lever 53 (described later) of the lens barrier 50 in the rotation direction, and is disposed on the rotation direction R1 side of the opening / closing lever 53. One of the three notches 79 is a portion in which the opening / closing lever 53 is accommodated in the Y-axis direction, and is disposed on the rotation direction R2 side of the protrusion 78 that functions as a drive protrusion.

As shown in FIGS. 6 and 21, the lens barrier 50 is a mechanism for protecting the first lens group G1 when the digital camera 1 is not in use (when retracted). It is fixed on the positive side. Specifically, the lens barrier 50 mainly includes a barrier mechanism 51, a pair of barrier blades 52, and an opening / closing lever 53. The barrier mechanism 51 supports a pair of barrier blades 52 so that they can be opened and closed.
The opening / closing operation of the pair of barrier blades 52 is switched by the opening / closing lever 53. Specifically, the opening / closing lever 53 is supported by the barrier mechanism 51 so as to be movable in the rotation direction. The open / close lever 53 is movable in the rotational direction between the open position Po and the closed position Ps, for example (see FIG. 21). The opening / closing lever 53 is disposed on the rotation direction R <b> 2 side of the protrusion 78 of the rotating cam frame 70. The opening / closing lever 53 is driven by the projection 78.

In a state where no load is applied to the opening / closing lever 53, the pair of barrier blades 52 are held in an open state (the opening / closing lever 53 is in the open position Po) by a spring (not shown) of the barrier mechanism 51. When the opening / closing lever 53 is pushed toward the rotation direction R2, the opening / closing lever 53 moves to the closed position Ps, and the pair of barrier blades 52 are closed. When the opening / closing lever 53 is held at the closed position Ps, the pair of barrier blades 52 are also held in the closed state.
(3.7: First straight line)
As shown in FIGS. 6, 22 (A), 22 (B), 23, and 25 (A), the first rectilinear frame 100 includes a first rectilinear frame body 109, three first protrusions 101, and the like. Three second protrusions 102, three first rectilinear grooves 107, three second rectilinear grooves 108, and a rotation groove 105 are provided. The first rectilinear frame 100 is disposed between the camera cam frame 40 and the first lens frame 60 in the radial direction.

  First rectilinear frame body 109 is a substantially cylindrical member, the decorative ring 170 is fixed to the end of the Y-axis direction positive side. The first protrusion 101 and second protrusion 102 are arranged on the outer peripheral portion of the first rectilinear frame body 109, and protrudes radially outward from the first rectilinear frame body 109. The first protrusion 101 and second protrusion 102 is disposed at the end of the Y-axis direction negative side of the first rectilinear frame body 109. Three first projections 101 are arranged at a constant pitch in the circumferential direction, the second protrusion 102 of the three are disposed at a constant pitch in the circumferential direction. The first protrusion 101 is inserted into the third rectilinear groove 49 of the camera cam frame 40, and the second protrusion 102 is inserted into the first rectilinear groove 47 of the camera cam frame 40. By the first protrusion 101, the second protrusion 102, the third rectilinear groove 49 and the first rectilinear groove 47, the first rectilinear frame 100 does not rotate with respect to the camera cam frame 40 and moves in the Y-axis direction with respect to the camera cam frame 40. It has become possible.

The first rectilinear groove 107 and the second rectilinear groove 108 are grooves extending in the Y-axis direction, and are formed on the inner peripheral surface of the first rectilinear frame main body 109. A second rectilinear pin 64 of the first lens frame 60 is inserted into the first rectilinear groove 107, and a first rectilinear pin 63 of the first lens frame 60 is inserted into the second rectilinear groove 108. Due to the first rectilinear groove 107, the second rectilinear groove 108, the first rectilinear pin 63, and the second rectilinear pin 64, the first lens frame 60 does not rotate with respect to the first rectilinear frame 100 and does not rotate with respect to the first rectilinear frame 100. Thus, it can move in the Y-axis direction.
The rotation groove 105 is an annular groove provided on the inner peripheral surface of the first rectilinear frame 100, and the rotation protrusion 75 of the rotation cam frame 70 is inserted therein. The rotating cam frame 70 is rotatable with respect to the first rectilinear frame 100 and can move integrally in the Y-axis direction by the rotating groove 105 and the rotating protrusion 75.

As shown in FIG. 37, a space S2 is secured between the decorative ring 170 and the first rectilinear frame main body 109 in the Y-axis direction, and a light shielding ring 171 is arranged in the space S2. The light shielding ring 171 includes a cylindrical portion 171a and a sliding portion 171b that protrudes radially inward from the cylindrical portion 171a.
The cylindrical portion 171a is formed to be thicker than the sliding portion 171b. The sliding portion 171b is a portion that slides with the decorative ring 180, and is disposed at the center of the cylindrical portion 171a in the Y-axis direction. Since the sliding part 171b is arranged at the center of the cylindrical part 171a, even if the sliding part 171b is deformed in the Y-axis direction, it does not come into contact with the decorative ring 170 and the first rectilinear frame main body 109.
A gap is secured between the cylindrical portion 171a and the decorative ring 170 in the radial direction. Furthermore, the length of the cylindrical portion 171a in the Y-axis direction is shorter than the dimension between the decorative ring 170 and the first rectilinear frame main body 109 in the Y-axis direction. Therefore, the light shielding ring 171 can move freely between the decorative ring 170 and the first rectilinear frame main body 109. With such a configuration, it is not necessary to fix the light shielding ring 171 to the first rectilinear frame main body 109 or the decorative ring 170, and it is possible to reduce the bonding space and the bonding process.

(3.8: Second straight frame)
As shown in FIGS. 25 to 27, the second rectilinear frame 80 is a member for preventing the second lens frame 190 and the third lens frame 200 from rotating with respect to the fixed frame 20, and the drive frame 30. It is arranged on the inner circumference side. Specifically, the second rectilinear frame 80 is mainly formed on the outer periphery of the annular second rectilinear frame body 81, the plurality of rotation protrusions 81 a (see FIGS. 7 to 10), and the second rectilinear frame body 81. The three rectilinear pins 84a, 84b, 84c and a pair of support plates 85 (an example of the first support portion and the second support portion) extending from the inner peripheral portion of the second rectilinear frame main body 81 to the Y axis direction positive side. ) And.
The second rectilinear frame main body 81 is accommodated in the flange portion 77 of the rotating cam frame 70 and is attached to the flange portion 77 so as to move integrally in the Y-axis direction. Specifically, the plurality of rotation protrusions 81a are inserted from the circumferential direction between the flange main body 77a of the flange portion 77 and the Y-axis direction of the stopper 77c. As a result, the second rectilinear frame 80 is rotatable with respect to the rotating cam frame 70 and moves in the Y-axis direction integrally with the rotating cam frame 70. The inner diameter of the second rectilinear frame body 81 is set to a size that allows the base frame 220 to pass through.

Further, the rectilinear pins 84 a to 84 c are guided by third rectilinear grooves 48 a to 48 c formed on the inner peripheral side of the camera cam frame 40. Therefore, the second rectilinear frame 80 is supported by the camera cam frame 40 so as to be movable in the Y axis direction without rotating with respect to the camera cam frame 40. As described above, the camera cam frame 40 does not rotate with respect to the fixed frame 20. That is, the second rectilinear frame 80 can move in the Y-axis direction without rotating with respect to the fixed frame 20 by the camera cam frame 40. Since the rotating cam frame 70 rotates with respect to the fixed frame 20 together with the drive frame 30, the second rectilinear frame 80 moves integrally with the rotating cam frame 70 in the Y-axis direction while rotating with respect to the rotating cam frame 70.
The pair of support plates 85 are plate-like portions that protrude to the Y axis direction positive side from the inner peripheral portion of the second rectilinear frame main body 81 (more specifically, the inner peripheral edge of the second rectilinear frame main body 81), The second lens frame 190 and the base frame 220 of the third lens frame 200 are supported so as to be movable in the Y-axis direction. The pair of support plates 85 are arranged so as to face each other with the optical axis A interposed therebetween, and sandwich the second lens frame 190 and the base frame 220 in the radial direction. The pair of support plates 85 protrude further radially inward from the inner peripheral edge of the second rectilinear frame main body 81 (see FIG. 26).

The pair of support plates 85 includes a rectilinear guide groove 193 (an example of a first rectilinear groove and a second rectilinear groove) of the second lens frame 190 and a rectilinear guide groove 223 (third rectilinear groove and fourth rectilinear groove) of the base frame 220. Is an example). More specifically, the support plate 85 includes a first plate 82 (an example of the first part and the second part) inserted into the rectilinear guide groove 223, and a second plate 83 (third part) inserted into the rectilinear guide groove 193. And an example of the fourth portion). The first plate 82 is a base portion of the first support plate 85 and extends from the second rectilinear frame body 81 to the Y axis direction positive side. The second plate 83 extends further to the Y axis direction positive side from the end of the first plate 82.
The circumferential width of the second plate 83 is different from the circumferential width of the first plate 82. Specifically, as shown in FIG. 27, the circumferential width W1 of the first plate 82 is larger than the circumferential width W2 of the second plate 83. The length L2 of the second plate 83 in the Y-axis direction is longer than the length L1 of the first plate 82 in the Y-axis direction. Further, the thickness (radial dimension) of the second plate 83 is larger than the thickness (radial dimension) of the first plate 82.

  A part of the second lens frame 190 can be inserted into the rectilinear guide groove 223 in a state where the second lens frame 190 and the third lens frame 200 are closest to each other in the optical axis direction. Specifically, the second lens frame 190 has a pair of guide portions 194 (an example of a first sliding portion and a second sliding portion) disposed on both sides of the second plate 83 in the circumferential direction. doing. Guiding portions 194 of the pair forms a linear guide grooves 193 are provided for each linear guide grooves 193. The third lens frame 200 has a pair of guide portions 224 (an example of a third sliding portion and a fourth sliding portion) disposed on both sides of the first plate 82 in the circumferential direction. Guiding portions 224 of the pair forms a linear guide grooves 223 are provided for each linear guide grooves 223. As shown in FIG. 27, the guide portion 194 is inserted into the rectilinear guide groove 223 with the second lens frame 190 and the third lens frame 200 closest to each other in the optical axis direction. At this time, the guide portion 224 is inserted into the recess 195 of the pair formed on the side of the guide portion 194 of the pair. As shown in FIGS. 27A and 27B, the guide portion 224 is provided with a cam pin 229, and the cam pin 192 is provided on the side of the recess 195. As shown in FIG. 27B, with the second lens frame 190 and the third lens frame 200 closest to each other in the optical axis direction (in FIG. 20B, the cam pin 192 and the cam pin 229 are at the retracted positions Pr3 and Pr4. the arrangement has been that state), the cam pin 192 and cam pins 229 are disposed at a substantially the same Y-axis direction position.

With such a configuration, the second lens frame 190 and the base frame 220 are guided in the Y-axis direction by the support plate 85 of the second rectilinear frame 80. Since the rotation of the second rectilinear frame 80 relative to the camera cam frame 40 is restricted by the three rectilinear pins 84a to 84c, the second lens frame 190 and the third lens frame 200 are fixed to the second rectilinear frame 80, the camera cam frame 40, and the fixed frame. It can move in the Y-axis direction without rotating with respect to the frame 20.
(3.9: Second lens frame)
The second lens frame 190 is a member for supporting the second lens group G2 so as to be movable in the Y-axis direction, and is disposed on the inner peripheral side of the second rectilinear frame 80. Specifically, as shown in FIG. 7, the second lens frame 190 mainly includes a second lens frame main body 191 that supports the second lens group G2, and 3 provided on the outer peripheral side of the second lens frame main body 191. One cam pin 192 and a pair of rectilinear guide grooves 193 formed on the outer peripheral portion of the second lens frame main body 191. The cam pin 192 is fitted in the third cam groove 74 a of the rotating cam frame 70.

The rectilinear guide groove 193 is a groove extending in the Y-axis direction, and is disposed at a position corresponding to the support plate 85 of the second rectilinear frame 80. The pair of rectilinear guide grooves 193 is disposed with the second lens group G2 interposed therebetween, and one rectilinear guide groove 193 is disposed on the opposite side with the other rectilinear guide groove 193 and the second lens group G2 interposed therebetween. .
The width of the rectilinear guide groove 193 in the circumferential direction is substantially the same as the width W2 of the second plate 83 of the support plate 85. As described above, the rectilinear guide groove 193 is formed by the pair of guide portions 194. The pair of guide portions 194 are arranged at intervals in the circumferential direction, and a rectilinear guide groove 193 is formed between the pair of guide portions 194. The pair of guide portions 194 sandwich the second plate 83 in the circumferential direction and are slidable with the second plate 83.
In addition, recesses 195 are formed on both sides of the pair of guide portions 194. With the second lens frame 190 and the base frame 220 closest to each other in the Y-axis direction, a guide portion 224 (described later) of the base frame 220 can be inserted into the concave portion 195.

With the above configuration, the second lens frame 190 can move in the Y-axis direction according to the shape of the third cam groove 74 a without rotating with respect to the fixed frame 20.
(3.10: Third lens frame)
The third lens frame 200 constitutes a shake correction device for suppressing the movement of the optical image generated by the movement of the exterior part 2 with respect to the CCD image sensor 141, and is arranged on the inner peripheral side of the second rectilinear frame 80. Yes. The third lens frame 200 is movable as a whole with respect to the fixed frame 20 in the Y-axis direction, and supports the third lens group G3 so as to be movable in a plane orthogonal to the optical axis. Specifically, as shown in FIGS. 7, 28 (A), 28 (B), 29 (A), and 29 (B), the third lens frame 200 mainly includes a base frame 220 and a second frame. And a correction lens frame 210 that supports the three lens group G3.

The base frame 220 includes a base frame main body 221, three cam pins 229 provided on the outer periphery of the base frame main body 221, a pair of straight guide grooves 223, a rotation shaft 222, a restriction shaft 225, a first A support shaft 226 and a second support shaft 227 are provided. The cam pin 229 is fitted in the fourth cam groove 74 b of the rotating cam frame 70.
The rectilinear guide groove 223 is a groove extending in the Y-axis direction, and is disposed at a position corresponding to the support plate 85 of the second rectilinear frame 80. A pair of rectilinear guide grooves 223 are disposed with the second lens group G2 interposed therebetween, and one rectilinear guide groove 223 is disposed on the opposite side with the other rectilinear guide groove 223 and the second lens group G2 interposed therebetween. Yes.
The width of the rectilinear guide groove 223 in the circumferential direction is substantially the same as the width W 1 of the first plate 82 of the support plate 85. As described above, the rectilinear guide groove 223 is formed by the pair of guide portions 224. The pair of guide portions 224 are arranged at intervals in the circumferential direction, and a rectilinear guide groove 223 is formed between the pair of guide portions 224. The pair of guide portions 224 sandwich the first plate 82 in the circumferential direction and can slide with the first plate 82. One of the three cam pins 229 is provided in the guide portion 224 (see FIG. 27A).

The rotation shaft 222, the restriction shaft 225, the first support shaft 226, and the second support shaft 227 are fixed to the base frame body 221. The rotation shaft 222 supports the correction lens frame 210 so as to be rotatable around the rotation axis B. The restriction shaft 225 restricts the movement range of the correction lens frame 210 relative to the base frame 220.
The first support shaft 226 and the second support shaft 227 support the correction lens frame 210 so as to be movable in a plane orthogonal to the optical axis A. Both ends of the first support shaft 226 are fixed to the base frame body 221. The second support shaft 227 is shorter than the first support shaft 226, and one end of the second support shaft 227 is fixed to the base frame body 221.
The correction lens frame 210 is supported by the base frame 220 so as to be movable in the pitching direction (an example of the first direction, the X-axis direction) and the yawing direction (an example of the second direction, the Z-axis direction). Specifically, the correction lens frame 210 includes a support frame main body 211, a pair of guide portions 212, a restriction portion 215, a pair of first guide members 216, and a second guide member 217. ing.

The pair of guide portions 212 protrudes from the base frame main body 221 to the positive side in the X-axis direction, and is arranged at an interval in the Z-axis direction. A rotating shaft 222 is inserted between the pair of guide portions 212. The correction lens frame 210 is rotatable about the center line B with respect to the base frame 220 and is movable in the X-axis direction by the guide portion 212 and the rotation shaft 222.
The restricting portion 215 is disposed on the opposite side of the support frame main body 211 from the guide portion 212 and protrudes from the support frame main body 211 to the X axis direction negative side. The restriction portion 215 is an annular portion, and a restriction shaft 225 is inserted therein. A movable range of the correction lens frame 210 relative to the base frame 220 is determined by the restriction portion 215 and the restriction shaft 225.
As shown in FIGS. 29A and 29B, the pair of first guide members 216 is a portion that slides with the first support shaft 226, and the first support shaft 226 is inserted therein. The movement of the correction lens frame 210 relative to the base frame 220 in the Y-axis direction is restricted by the first guide member 216 and the first support shaft 226.

The 2nd guide member 217 is a part which slides with the 2nd support shaft 227, and the 2nd support shaft 227 is inserted. The movement of the correction lens frame 210 in the Y-axis direction with respect to the base frame 220 is restricted by the second guide member 217 and the second support shaft 227.
Further, the base frame 220 is provided with a pitching direction drive coil 233, a yawing direction drive coil 234, a pitching direction position sensor 231 and a yawing direction position sensor 232.
Further, the correction lens frame 210 is provided with a pitching yoke 237, a yawing yoke 238, a pitching magnet 235, and a yawing magnet 236. The pitching yoke 237 is fixed to the base frame 220, and the pitching magnet 235 is fixed to the pitching yoke 237. The yawing yoke 238 is fixed to the base frame 220, and the yawing magnet 236 is fixed to the yawing yoke 238.

The pitching yoke 237 and the pitching magnet 235 are disposed so as to face the pitching direction drive coil 233 in the Y-axis direction. The yawing magnet 236 and the yawing yoke 238 are disposed so as to face the yawing direction drive coil 234 in the Y-axis direction. The pitching direction drive coil 233 and the pitching magnet 235 and the pitching yoke 237 constitute a first drive unit 241 that generates a driving force in the pitching direction. Together with the yawing magnet 236 and the yawing yoke 238, the yawing direction drive coil 234 constitutes a second drive unit 242 that generates a driving force in the yawing direction.
Here, the feature of the arrangement of each part will be described. As shown in FIG. 28B, the first support shaft 226 has a first center line D1, and is arranged so that the first center line D1 is parallel to the X axis. The second support shaft 227 has a second center line D2, and is arranged so that the second center line D2 is parallel to the X axis. When viewed from the Y-axis direction, the rotation shaft 222 and the restriction shaft 225 are disposed between the first center line D1 and the second center line D2. The rotation shaft 222 and the restriction shaft 225 are disposed between the first center line of the first support shaft 226 and the second center line of the second support shaft 227 when viewed from a direction parallel to the optical axis. . When viewed from the Y-axis direction, a reference line segment D3 that connects the center of the rotary shaft 222 and the center of the restriction shaft 225 and is orthogonal to the Y-axis direction is parallel to the first center line D1 and the second center line D2. ing. The reference line segment D3 does not overlap the first center line and the second center line when viewed from a direction parallel to the optical axis.

  Further, the rotation shaft 222, the restriction shaft 225, the first support shaft 226, and the second support shaft 227 are disposed at different positions (positions that do not overlap) when viewed from the Y-axis direction, and further, They are arranged at different positions (non-overlapping position) and the drive unit 241 and the second driving unit 242. With this configuration, as shown in FIG. 30, the first drive unit 241 and the second drive unit 242 are arranged at the positions of the first support shaft 226 and the second support shaft 227 in the optical axis direction. It falls within the region J in the optical axis direction. Furthermore, a plane H1 including the first center line D1 and the second center line D2 is disposed close to the sliding position H2 between the rotating shaft 222 and the sliding portion 212a of the guide portion 212. Thus, miniaturization of the third lens frame 200 as a whole in the Y-axis direction (i.e., thickness of the stabilizing device) can be performed.

Furthermore, as shown in FIG. 28A, the center of gravity G of the portion including the third lens group G3 and the correction lens frame 210 and driven by the first drive unit 241 and the second drive unit 242 When viewed from a direction parallel to the axis, the first support shaft 226 is disposed between the first center line of the first support shaft 226 and the second center line of the second support shaft 227. Here, the parts driven by the first drive unit 241 and the second drive unit 242 are, in this case, the third lens group G3, the correction lens frame 210, the pitching magnet 235, the yawing magnet 236, the pitching yoke 237, and the yawing yoke. An assembly composed of 238 is meant. With this arrangement, the driving of the third lens group G3 is stabilized.
(3.11: Fourth lens frame)
As shown in FIG. 7, the fourth lens frame 90 is a member for supporting the fourth lens group G4 so as to be movable in the Y-axis direction, and includes three shafts 14a and 14b formed on the master flange 10. 14c is supported so as to be movable in the Y-axis direction. The fourth lens frame 90 is driven by a focus motor 120 fixed to the master flange 10. When driven by the focus motor 120, the fourth lens frame 90 moves in the Y axis direction with respect to the master flange 10. Thereby, the focus can be adjusted in the optical system O.

(3.11: Shutter unit)
The shutter unit 95 is a mechanism for adjusting the exposure state, and is disposed between the second lens frame 190 and the third lens frame 200. The shutter unit 95 is fixed to the base frame 220 of the third lens frame 200 and can move in the Y-axis direction with respect to the fixed frame 20 together with the third lens frame 200.
(3.12: Image sensor unit)
As shown in FIGS. 31 to 33C, the image sensor unit 140 includes a master flange 10, an IR absorbing glass 135 (an example of an optical element), a CCD image sensor 141, a light shielding sheet 130, and a CCD sheet metal 142. (An example of a fixed plate), a CCD cover glass 143, and connection terminal portions 18 and 19.

The master flange 10 is fixed to the fixed frame 20 and is disposed on the Y axis direction negative side of the fixed frame 20. A rectangular opening 12 is formed in the master flange 10. An optical image formed by the optical system O passes through the opening 12 and is formed on the light receiving surface of the CCD image sensor 141.
The IR absorbing glass 135 is a rectangular sheet-like member that is smaller than the opening 12 and is disposed in the opening 12. The IR absorbing glass 135 performs an infrared absorption process (an example of an optical process) on the light passing through the opening 12. The CCD image sensor 141 converts the light transmitted through the IR absorbing glass 135 into an electric signal.
The light shielding sheet 130 is a sheet-like member sandwiched between the CCD image sensor 141 and the IR absorbing glass 135, and is disposed outside the adhesive portion 131 having an annular shape (an example of the first light shielding portion). And an enlarged portion 132 (an example of a second light shielding portion).

The adhesive portion 131 is an annular portion sandwiched between the IR absorption glass 135 and the CCD image sensor 141 (more specifically, between the IR absorption glass 135 and the CCD cover glass 143). The cover glass 143 is adhesively fixed. The opening 131 a of the bonding portion 131 is smaller than the outer shapes of the IR absorption glass 135 and the CCD cover glass 143.
The enlarged portion 132 is a portion for preventing dust, and has an outer shape larger than that of the opening 12. The enlarged portion 132 is in contact with the master flange 10 and is bent in a state of being in contact with the master flange 10.
The master flange 10 has an inclined surface 14 formed around the opening 12 and inclined with respect to the light receiving surface of the CCD image sensor 141, and the enlarged portion 132 is in contact with the inclined surface 14. The inclined surface 14 is inclined so that the enlarged portion 132 can be closely attached as a whole.

[4: Operation of digital camera]
The operation of the digital camera 1 will be described with reference to FIGS.
(4.1: State when power is off)
When the power switch 6 is OFF, the lens barrel 3 is in the retracted state (the dimension of the lens barrel 3 in the Y-axis direction is the largest) so that the lens barrel 3 is within the outer dimension of the exterior portion 2 in the Y-axis direction. It is stopped in a short state (the state shown in FIG. 8).
In this state, the lens barrier 50 of the lens barrel 3 is in a closed state. Specifically, the opening / closing lever 53 of the lens barrier 50 is pushed toward the rotation direction R2 by the projection 78 of the rotating cam frame 70. For this reason, the barrier blades 52 of the lens barrier 50 are held in a closed state.
(4.2: Operation when the power is turned on)
<4.2.1: Operation of lens barrel>
When the power switch 6 is switched ON, power is supplied to each part, and the lens barrel 3 is driven from the retracted state to the photographing state. Specifically, the drive frame 30 is driven by the zoom motor 110 in the R1 direction with respect to the fixed frame 20 by a predetermined angle. As a result, the drive frame 30 moves to the Y axis direction positive side with respect to the fixed frame 20 along the inclined groove 23 while rotating with respect to the fixed frame 20.

When the drive frame 30 rotates with respect to the fixed frame 20 and moves in the Y-axis direction, the camera cam frame 40 moves together with the drive frame 30 in the Y-axis direction by the first rotation protrusion 43 and the second rotation protrusion 45. To do. At this time, since the rectilinear protrusions 46 a to 46 c of the camera cam frame 40 are guided in the Y-axis direction by the rectilinear grooves 27 a to 27 c of the fixed frame 20, the camera cam frame 40 does not rotate with respect to the fixed frame 20. It moves integrally in the Y-axis direction (see FIGS. 13A and 13B).
Further, as shown in FIG. 14B, the distal end portion of the cam pin 76 of the rotating cam frame 70 is fitted into the rectilinear groove 38 of the driving frame 30, and the rotating cam frame 70 together with the driving frame 30 is fixed to the fixed frame 20. Rotate against. As a result, the rotating cam frame 70 and the camera cam frame 40 rotate relative to each other. Since the cam pin 76 of the rotating cam frame 70 passes through the through cam groove 42 of the camera cam frame 40, the rotating cam frame 70 rotates relative to the camera cam frame 40 and the fixed frame 20 according to the shape of the through cam groove 42. While moving in the Y-axis direction.

The second rectilinear frame 80 is provided so as to be rotatable with respect to the rotating cam frame 70 and integrally movable in the Y axis direction, and the second rectilinear frame 80 is not rotated with respect to the camera cam frame 40 in the Y axis direction. It is provided to be movable. With these configurations, when the rotating cam frame 70 moves in the Y-axis direction while rotating with respect to the camera cam frame 40 and the fixed frame 20, the second rectilinear frame 80 rotates with respect to the camera cam frame 40 and the fixed frame 20. Instead, it moves integrally with the rotating cam frame 70 in the Y-axis direction with respect to the camera cam frame 40 and the fixed frame 20.
When the rotating cam frame 70 moves in the Y-axis direction while rotating with respect to the fixed frame 20, the first lens frame 60 moves in the Y-axis direction accordingly. Specifically, the rotation protrusion 75 of the rotation cam frame 70 is inserted into the rotation groove 105 of the first rectilinear frame 100, and the first protrusion 101 and the second protrusion 102 of the first rectilinear frame 100 are the camera cam frame 40. Are inserted into the third rectilinear groove 49 and the first rectilinear groove 47. With these configurations, when the rotating cam frame 70 moves in the Y-axis direction while rotating with respect to the fixed frame 20, the first rectilinear frame 100 does not rotate with respect to the fixed frame 20 and the camera cam frame 40. And move in the Y-axis direction.

  Further, when the rotating cam frame 70 rotates with respect to the fixed frame 20, the first cam pins 68 of the first lens frame 60 are guided in the Y-axis direction by the first cam grooves 72 of the rotating cam frame 70. Therefore, the first lens frame 60 moves in the Y axis direction with respect to the rotary cam frame 70, and the first rectilinear frame 100. At this time, since the first rectilinear pin 63 and the second rectilinear pin 64 of the first lens frame 60 are respectively inserted into the second rectilinear groove 108 and the first rectilinear groove 107 of the first rectilinear frame 100, the first lens frame 60 moves in the Y-axis direction without rotating with respect to the first rectilinear frame 100. Therefore, according to the shape of the first cam groove 72, the first lens frame 60 moves in the Y-axis direction (while rotating relative to the rotary cam frame 70) without rotating with respect to the fixed frame 20. At this time, since a gap is secured between the second cam pin 69 and the second cam groove 73, the second cam pin 69 moves in the second cam groove 73 without contacting the second cam groove 73. .

  Further, the cam pin 192 of the second lens frame 190 is fitted into the third cam groove 74a of the rotary cam frame 70. The cam pin 229 of the third lens frame 200 is fitted in the fourth cam groove 74 b of the rotating cam frame 70 while passing through the rectilinear groove 82 of the second rectilinear frame 80. Straight pin 84 of the second rectilinear frame 80 is fitted to the third rectilinear grooves 49 of the camera cam frame 40. Therefore, the second rectilinear frame 80 is movable in the Y-axis direction without rotating with respect to the camera cam frame 40 and the fixed frame 20. With these configurations, the second lens frame 190 and the third lens frame 200 do not rotate with respect to the second rectilinear frame 80, the camera cam frame 40, and the fixed frame 20 but rotate with respect to the rotating cam frame 70. Accordingly, the second lens frame 190 is moved in the Y-axis direction along the third cam groove 74a, the third lens frame 200 moves in the Y-axis direction along the fourth cam groove 74b.

As described above, when a driving force is input to the drive frame 30 during the retracting operation, the drive frame 30 moves in the Y-axis direction with respect to the fixed frame 20 and is supported by the drive frame 30 accordingly. Each member moves in the Y-axis direction with respect to the fixed frame 20. When the drive frame 30 rotates by a predetermined angle, the rotation of the drive frame 30 stops, and the first lens frame 60, the second lens frame 190, and the third lens frame 200 stop at the wide angle end. With the above operation, the lens barrel 3 is in a photographing state (for example, the state shown in FIG. 9), and photographing with the digital camera 1 is possible.
(5.3: Zoom operation during shooting)
<5.3.1 Operation on the telephoto side>
When the zoom adjustment lever 7 is operated to the telephoto side, the drive frame 30 is driven in the R1 direction with respect to the fixed frame 20 by the zoom motor 110 according to the rotation angle of the zoom adjustment lever 7 and the operation time. As a result, the rotating cam frame 70 moves to the Y axis direction positive side with respect to the drive frame 30 while rotating together with the drive frame 30. At this time, the drive frame 30 rotates with respect to the fixed frame 20, but does not move in the Y-axis direction.

The first lens frame 60 is mainly positive in the Y-axis direction with respect to the rotating cam frame 70 while rotating with respect to the rotating cam frame 70 (without rotating with respect to the fixed frame 20 and the first rectilinear frame 100). Move to the side. On the other hand, the second lens frame 190 mainly moves to the Y axis direction negative side with respect to the rotating cam frame 70 while rotating with respect to the rotating cam frame 70 (without rotating with respect to the fixed frame 20). Further, the third lens frame 200 moves mainly to the Y axis direction positive side while rotating with respect to the rotating cam frame 70 (without rotating with respect to the fixed frame 20). With these operations, the zoom magnification of the optical system O gradually increases. When the lens barrel 3 reaches the telephoto end, the lens barrel 3 stops in the state shown in FIG.
<5.3.2: Wide-angle operation>
When the zoom adjustment lever 7 is operated to the wide angle side, the drive frame 30 is driven in the R2 direction with respect to the fixed frame 20 by the zoom motor 110 according to the rotation angle and operation time of the zoom adjustment lever 7. As a result, the rotating cam frame 70 moves to the Y axis direction negative side with respect to the drive frame 30 while rotating together with the drive frame 30. At this time, the drive frame 30 rotates with respect to the fixed frame 20, but does not move in the Y-axis direction.

The first lens frame 60 moves mainly to the Y axis direction negative side with respect to the rotating cam frame 70 while rotating with respect to the rotating cam frame 70 (without rotating with respect to the fixed frame 20). On the other hand, the second lens frame 190 mainly moves to the Y axis direction positive side with respect to the rotating cam frame 70 while rotating with respect to the rotating cam frame 70 (without rotating with respect to the fixed frame 20). Further, the third lens frame 200 moves mainly to the Y axis direction negative side with respect to the rotating cam frame 70 while rotating with respect to the rotating cam frame 70 (without rotating with respect to the fixed frame 20). With these operations, the zoom magnification of the optical system O gradually decreases. When the lens barrel 3 reaches the wide-angle end, the lens barrel 3 stops in the state shown in FIG.
[6: Features]
The characteristics of the lens barrel 3 described above are summarized below.

(6.1)
In the lens barrel 3, when the first lens frame 60 is guided in the Y-axis direction with respect to the rotating cam frame 70 by the first cam pins 68 and the first cam grooves 72, the first lens frame 60 is rotated by the rotating cam frame 70. Move in the Y-axis direction while rotating with respect to. For example, in the retracted state, as shown in FIG. 17, the total length of the first lens frame 60 and the rotating cam frame 70 is the shortest, and the protrusion 78 of the rotating cam frame 70 is inserted into the first opening 67 a of the first lens frame 60. Is done. For this reason, the space | interval of the optical axis direction of the rotating cam frame 70 and the 1st lens frame 60 can be closed, the dimension of the Y-axis direction of the lens barrel 3 at the time of accommodation can be shortened, and size reduction is possible. It becomes.
On the other hand, when a large external force is applied to the lens barrel 3, the first lens frame 60 and the rotating cam frame 70 may be damaged.

However, since the second cam pin 69 of the first lens frame 60 is inserted into the second cam groove 73 of the rotating cam frame 70 via a gap, an external force is applied to the lens barrel 3 and the rotating cam frame 70 or the first lens. When the frame 60 is elastically deformed, the second cam pin 69 comes into contact with the wall surface of the second cam groove 73. As a result, the external force applied to the lens barrel 3 can be distributed not only to the first cam pin 68 and the first cam groove 72 but also to the second cam pin 69 and the second cam groove 73, such as the first cam pin 68 and the like. It is possible to prevent the members of the first cam pin 68 and the second cam pin 69 from dropping from the first cam groove 72 and the second cam groove 73 of the rotating cam 70.
In particular, since the end of the second cam groove 73 on the side of the protrusion 78 is disposed between the two adjacent protrusions 78 in the circumferential direction, the size of the notched portion between the protrusions 78 is determined. The second cam groove 73 is not restricted. For this reason, the dimension of the projection part 78 can be taken large in an optical axis direction, and the full length of the 1st lens frame 60 and the rotating cam frame 70 in a retracted state can be shortened.

On the other hand, the second cam groove 73 is open to the projecting side at the notched portion between the protrusions 78. The second cam pin 69 is located at the notched portion of the second cam groove 73 when the first lens frame 60 is at the most object side position (telephoto position) with respect to the rotating cam frame 70. Even if a negative force in the Y-axis direction is applied to the lens barrel 3 in this state, the second cam pin 69 and the second cam groove 73 come into contact with each other, so that the member is damaged or the first cam pin 68 and The second cam pin 69 can be prevented from falling off the first cam groove 72 and the second cam groove 73 of the rotating cam 70.
As described above, the lens barrel 3 can be further reduced in size while preventing breakage of members and dropping of the cam pins.
If the first lens group G1 is arranged on the Y axis direction positive side of the first lens frame body 61, the protrusion 78 may be arranged on the Y axis direction negative side of the cam frame body 71. Good. Even in this case, the same effect as described above can be obtained.

(6.2)
For example, as shown in FIG. 20A, the first contact portion 73c of the rotating cam frame 70 forms an edge of the second cam groove 73, and a gap is formed between the second cam pin 69 and the second cam pin 69 in the Y-axis direction. Therefore, when a large force is applied to the lens barrel 3 and at least one of the first lens frame 60 and the rotating cam frame 70 is elastically deformed, the second cam pin 69 is in the first contact. It contacts the part 73c. As a result, in addition to the first cam pin 68 and the first cam groove 72, the second cam pin 69 and the first contact portion 73c can also receive an impact in the Y-axis direction. For this reason, even if a large force is applied to the lens barrel 3, it can be dispersed to the first cam pins 68 and the second cam pins 69, and damage to the lens barrel 3 can be prevented.
In particular, since the total length of the lens barrel 3 is the longest at the telephoto end, if a large force is applied to the lens barrel 3 in the telephoto end state, the impact (particularly the force in the Y-axis direction) applied to the first cam pin 68 is also large. Become.

However, since the first contact portion 73c is arranged opposite to the second cam pin 69 in the Y-axis direction in the telephoto end state as described above, at least at the telephoto end where the impact at the time of dropping is expected to increase. The lens barrel 3 can be prevented from being damaged.
(6.3)
As shown in FIG. 24, since the first cam pin 68 and the first cam groove 72 have a tapered shape, when an external force in the Y-axis direction acts between the first lens frame 60 and the rotating cam frame 70, The one cam pin 68 and the first cam groove 72 convert at least a part of the external force into a force for separating the first lens frame 60 from the rotating cam frame 70 in the radial direction. As a result, at least one of the first lens frame 60 and the rotating cam frame 70 is elastically deformed in the radial direction (see FIG. 23).

On the other hand, since the second cam pin 69 and the first contact portion 73c are also tapered, the second cam pin 69 is pressed against the first contact portion 73c by elastic deformation of the first lens frame 60 and the rotating cam frame 70. Then, at least a part of the pressing force is converted into a force for separating the first lens frame 60 from the rotary cam frame 70 in the radial direction. That is, as in the case of the first cam pin 68 and the first cam groove 72, at least one of the first lens frame 60 and the rotating cam frame 70 is elastically deformed in the radial direction.
As described above, when the periphery of the first cam pin 68 of the first lens frame 60 tries to be elastically deformed in the radial direction, the periphery of the second cam pin 69 of the first lens frame 60 tries to be elastically deformed in the radial direction in the same manner. The radial force acts on the first lens frame 60 and the rotating cam frame 70 almost evenly. For this reason, even if a large external force is applied to the lens barrel 3, the first lens frame 60 and the rotating cam frame 70 can be prevented from being deformed in a biased manner, and damage to the lens barrel 3 can be reliably prevented.

In particular, since the second cam pin 69 is disposed between the circumferential directions of two adjacent first cam pins 68, the positions of the first cam pin 68 and the second cam pin 69 in the Y-axis direction are substantially the same. The elastic deformation in the radial direction of the one lens frame 60 and the rotating cam frame 70 can be made more uniform.
The second cam pin 69 only needs to be disposed at substantially the same position as the first cam pin 68 in the Y-axis direction, and if the same effect can be obtained, the second cam pin 69 and the first cam pin 68 align with the Y-axis direction. May be slightly off.
In addition, since the second cam pin 69 and the second cam groove 73 play an auxiliary role of the first cam pin 68 and the first cam groove 72, at least one second cam pin 69 and at least one second cam groove 73 are provided. It only has to be done.

(6.4)
Furthermore, since the first lens frame 60 has the second contact portion 73d disposed so as to face the second cam pin 69 via a gap in the radial direction, the first lens frame 60 is subjected to an impact when dropped. Even when at least one of the rotating cam frames 70 is elastically deformed in the radial direction, the radial displacement can be received by the second contact portion 73d via the second cam pin 69. For this reason, it is possible to prevent the first lens frame 60 and the rotating cam frame 70 from being greatly deformed in the radial direction and to prevent the lens barrel 3 from being damaged. When the lens barrel 3 is at the telephoto end, the second contact portion 73d is provided at a position facing the second cam pin 69 via a gap in the radial direction, so that the lens barrel 3 is at the telephoto end. A similar effect can be obtained even if it falls.
(6.5)
In this lens barrel 3, since the second cam pin 69 is inserted into the second cam groove 73, the first lens frame 61 and the cam frame main body 71 can be arranged close to each other in the radial direction even if the first lens frame main body 61 and the cam frame main body 71 are arranged close to each other. When the frame 60 and the rotating cam frame 70 move relative to each other, the second cam pin 69 can be prevented from buffering with the cam frame main body 71. That is, with such a configuration, the increase in size of the lens barrel 3 due to the second cam pins 69 can be suppressed or prevented.

(6.6)
As shown in FIGS. 15 and 16B, since the cam pin 76 can be introduced into the through cam groove 42 through the insertion openings 42a to 42c of the camera cam frame 40, the fixed frame 20, the rotating cam frame 70, and the camera cam frame 40 Assembly becomes easy. Furthermore, since the insertion ports 42a to 42c are arranged at positions corresponding to the rectilinear projections 46a to 46c, it is possible to prevent a decrease in strength due to the insertion ports 42a to 42c. That is, the lens barrel 3 can prevent the strength from being lowered while securing the assembling property. Further, it is not necessary to enlarge the camera cam frame 40 in the radial direction in order to ensure the strength.
Further, the plurality of flange portions 44 connect two adjacent rectilinear projections 46a to 46c in the circumferential direction, and form an annular portion that protrudes radially outward from the camera cam frame body 41 together with the rectilinear projections 46a to 46c. Yes. Therefore, the strength of the camera cam frame main body 41 can be increased by the linearly-moving projections 46a to 46c and the flange portion 44 as compared with the case where the linearly-moving projections 46a to 46c are simply provided, and the strength reduction due to the insertion ports 42a to 42c can be prevented. .

(6.7)
As shown in FIG. 34, when viewed from the Y-axis direction, the connection terminal portions 18 and 19 are arranged at positions (non-overlapping positions) different from the rectilinear protrusions 46a to 46c. The rectilinear protrusions 46a to 46c do not overlap with the optical axis direction. Specifically, referring to virtual lines Ca to Cc passing through the centers of the insertion ports 42 a to 42 c and parallel to the Y-axis direction, the connection terminal portions 18 and 19 are provided around the virtual lines Ca to Cc of the master flange 10. Not placed. With such an arrangement, the degree of freedom in design is higher than in the case where the rectilinear protrusions 46a to 46c and the connection terminal portions 18 and 19 are arranged at the same position, and the lens barrel 3 can be downsized.
In particular, when the thickness of the linearly projecting protrusions 46a to 46c is larger than that of the flange portion 44 and protrudes to the Y axis direction negative side (master flange 10 side) from the flange portion 44, the effect of downsizing is increased. Further, in this case, it is preferable that portions of the surface of the master flange 10 on the camera cam frame 40 side that correspond to the rectilinear protrusions 46a to 46c when viewed from the Y-axis direction are recessed to the Y-axis direction negative side. For example, the recesses 17a and 17c shown in FIG. 31 correspond to this. With the lens barrel 3 retracted, a part of the rectilinear protrusion 46a is accommodated in the recess 17a, and a part of the rectilinear protrusion 46c is accommodated in the recess 17c. With such a configuration, the lens barrel 3 can be further reduced in size.

(6.8)
As shown in FIG. 27, the support plate 85 protruding in the Y-axis direction from the second rectilinear frame body 81 is inserted into the rectilinear guide groove 193 of the second lens frame 190 and the rectilinear guide groove 223 of the third lens frame 200. Yes. As described above, since the second lens frame 190 and the third lens frame 200 are supported by the pair of support plates 85, the second lens frame 190 and the third lens are compared with the case where the cylindrical rectilinear frame is used. The area on the outer periphery side of the frame 200 can be used effectively. That is, by using the second rectilinear frame 80 having the pair of support plates 58 to support the two lens frames so as to be able to advance straight, the lens barrel 3 can be reduced in size.
Particularly, since the circumferential width W1 of the first plate 82 is set larger than the circumferential width W2 of the second plate 83, the second lens frame 190 and the third lens frame 200 are arranged in the optical axis direction. In the closest state, a part of the second lens frame 190 (a pair of guide portions 194) can be inserted into the rectilinear guide groove 223. With such a configuration, the entire length of the second lens frame 190 and the third lens frame 200 during storage can be shortened while ensuring a large movable range of the second lens frame 190 and the third lens frame 200, and the optical system. The lens barrel 3 can be further reduced in size while increasing the degree of freedom in O design.

In addition to the relationship between the widths W1 and W2, the length L2 in the optical axis direction of the second plate 83 having a small width W2 is set longer than the length L1 in the optical axis direction of the first plate 82 having a large width W1. Therefore, the movable range of the second lens frame 190 is not easily obstructed by the wide first plate 82. On the other hand, the movable range of the third lens frame 200 guided by the wide first plate 82 is not limited by the second plate 83. That is, the degree of freedom in designing the optical system O can be further increased.
Further, since the length L2 of the second plate 83 can be shortened, the entire length of the support plate 85 can be suppressed to a necessary minimum, and the lens barrel 3 can be further reduced in size.
As shown in FIG. 39, the circumferential width W2 of the second plate 83 may be larger than the circumferential width W1 of the first plate 82. In this case, a part of the third lens frame 200 can be inserted into the rectilinear guide groove 193 with the second lens frame 190 and the third lens frame 200 closest to each other in the optical axis direction. Furthermore, it is preferable that the length L1 in the Y-axis direction of the first plate 82 having a small width W1 is longer than the length L2 in the Y-axis direction of the second plate 83 having a large width W2. Even with such a configuration, the same effects as those of the above-described embodiment can be obtained.

Moreover, although a pair of support plate 85 has the same shape, the shape of each support plate 85 may differ. Similarly, the shape of each rectilinear guide groove 193 may be different, and the shape of each rectilinear guide groove 223 may be different.
(6.9)
As shown in FIGS. 31 and 32, in the image sensor unit 140, since the outer shape of the enlarged portion 132 of the light shielding sheet 130 is larger than the opening 12 of the master flange 10, the CCD image sensor 141 side of the master flange 10 (that is, the lens) The enlarged part 132 can suppress the dust that has entered from the outside of the lens barrel 3 from flowing into the opposite side through the opening 12.
In particular, since the enlarged portion 132 of the light shielding sheet 130 is bent in contact with the master flange 10, the flow path of dust flowing toward the opening 12 can be reliably blocked by the enlarged portion 132. Further, with such a configuration, even if the position of the light shielding sheet 130 in the Y-axis direction with respect to the master flange 10 is slightly shifted for each product, the positional shift can be absorbed by the deflection of the enlarged portion 132.

Further, the adhesive portion 131 of the light shielding sheet 130 is fixed to the IR absorption glass 135 by adhesion, and the IR absorption glass 135 is disposed in the opening 12. For this reason, the dimension of the image sensor unit 140 can be shortened by a length corresponding to the thickness of the IR absorption glass 135, and the lens barrel 3 can be downsized.
When only the dust-proof effect is required, the IR absorbing glass 135 may not be disposed in the opening 12, and the IR absorbing glass 135 is disposed on the CCD image sensor 141 side from the edge of the opening 12 of the master flange 10. It may be.
Further, when only the minimum dustproof effect is required, the enlarged portion 132 may not be bent, and further, the enlarged portion 132 may not be in contact with the master flange 10 in the Y-axis direction. That is, if the enlarged portion 132 having a large outer shape is arranged near the edge of the opening 12, the periphery of the enlarged portion 132 has a labyrinth structure, and thus a dustproof effect can be expected.

(6.10)
As shown in FIG. 28, the first support shaft 226 and the second support shaft 227 are arranged at positions different from the first drive unit 241 and the second drive unit 242 when viewed from the Y-axis direction. For example, compared with the case where the first support shaft 226 is disposed at the same position as the first drive unit 241, the third lens frame 200 (shake correction device) can be made thinner.
(6.11)
As shown in FIG. 35, unnecessary light may enter the outer peripheral side of the cam frame main body 71 from the notch 79 of the rotating cam frame 70 or the opening 65 of the first lens frame 60. In this lens barrel 3, an annular flange portion 77 is provided at the end opposite to the notch 79 of the cam frame main body 71, so that the outer peripheral side of the cam frame main body 71 passes through the notch 79 and the opening 65. At least a part of unnecessary light incident on the light can be blocked by the flange portion 77, and a decrease in optical performance can be suppressed.

In particular, the notch 66 (an example of the second notch) of the first lens frame 60 penetrates in the radial direction together with the notch 79 in a state where the total length of the first lens frame 60 and the rotating cam frame 70 is maximized. Since it is provided so as to form the window 160, the light shielding effect by the flange portion 77 is great.
[7: Other embodiments]
Embodiments of the present invention are not limited to the above-described embodiments, and various modifications and changes can be made without departing from the spirit of the present invention.
(7.1)
The configuration of the optical system is not limited to the above-described configuration. For example, each lens group may be composed of a single lens or a plurality of lenses.

(7.2)
If there is no problem in structure, each cam groove may be a groove through which a groove that does not penetrate (a groove having a bottom) or a groove that does not penetrate through the groove.
Each cam pin may be formed integrally with the frame body or may be a separate body.
(7.3)
As shown in FIG. 28, when viewed from the Y-axis direction, the first center line D1, the second center line D2, and the reference line segment D3 are arranged in parallel, but the first center line D1, the second center If the line D2 and the reference line segment D3 do not intersect within the range of the base frame 220, at least one of the first center line D1, the second center line D2, and the reference line segment D3 is not parallel to the other lines. May be.
(7.4)
In the above-described embodiment, a digital still camera is described as an example of a device on which the lens barrel 3 is mounted. However, the device on which the lens barrel 3 is mounted is an apparatus that needs to form an optical image. Good. As an apparatus on which the lens barrel 3 is mounted, for example, an imaging apparatus capable of capturing only a still image, an imaging apparatus capable of capturing only a moving image, and an imaging apparatus capable of capturing both a still image and a moving image are conceivable.

[8: Appendix]
The following problems also exist in the conventional technology.
(1) In the conventional lens barrel, it is necessary to shorten the size of each frame body in the optical axis direction in order to reduce the size, but the size of the cam frame in which the cam groove is formed in the optical axis direction. If the length is shortened, the design of the cam groove is affected, so that further downsizing is difficult.
On the other hand, when an external force acts on the lens barrel, members such as cam pins may be damaged. In Patent Document 4, the second cam pin 69 and the second cam groove 73 for reinforcement are provided to disperse the portion where the external force acts and prevent the member from being damaged.
However, a technology that can realize further miniaturization while preventing breakage of members has not yet been proposed.

(2) In the lens barrel described in Patent Document 4, a cam frame having a penetrating cam groove through which a cam pin penetrates in the radial direction is used (for example, camera cam frame 40).
However, if the insertion opening is formed large, the strength of the cam frame is reduced. Conversely, if the insertion opening is small, the assembling property of the parts is reduced when the cam pin is inserted into the through cam groove.
(3)
Further, the lens barrel described in Patent Document 5 uses a rectilinear frame that supports the lens frame so as to be movable in the optical axis direction by three plate-like portions extending in the optical axis direction (for example, the second rectilinear advance). Guide ring 10). With such a configuration, the radial dimension can be reduced as compared with the case where a cylindrical rectilinear frame is used.
However, no technology has been proposed that can realize downsizing of the entire lens barrel including the optical axis direction.

(4) Although a conventional lens barrel is provided with a shake correction device, a further reduction in the thickness of the shake correction device is required in accordance with a demand for downsizing the lens barrel.
(5) A configuration in which a protrusion or a notch is provided at the end of the cam frame has been proposed. If a notch is provided at the end of the cam frame, unnecessary light passing through the notch out of the light incident through the optical system is incident on the outer peripheral side of the cam frame, resulting in a decrease in optical performance.
From the above, as a first problem, it is conceivable to provide a lens barrel that can realize further downsizing while preventing damage to the member.
As a second problem, it is conceivable to provide a lens barrel capable of preventing the strength from being lowered while securing the assembling property.
As a third problem, it is conceivable to reduce the size of the lens barrel.

As a fourth problem, it is conceivable to reduce the thickness of the shake correction device.
As a fifth problem, it is conceivable to provide a cam frame that can suppress a decrease in optical performance.
Therefore, as means for solving the above first to fifth problems, those having first to fifth characteristics described later can be cited, respectively.
The lens barrel according to the first feature includes a lens frame and a cam frame. The lens frame includes a lens frame main body that supports a lens element included in the optical system, at least three through holes formed in the lens frame main body and penetrating in the optical axis direction of the optical system, and at least three provided in the lens frame main body. And a cam member and at least one projecting portion projecting radially from the lens frame main body. The cam frame includes a cam frame main body, at least three protrusions that protrude from the cam frame main body in the optical axis direction of the optical system and can be inserted into the through holes, and grooves formed in the cam frame main body and the protrusions. And at least three cam grooves in which the cam member is inserted and the lens frame is movably supported with respect to the cam frame main body, and at least one auxiliary groove in which the protrusion is inserted through the gap. The end of the auxiliary groove on the protruding portion side is disposed between the circumferential directions of two adjacent protruding portions.

In this lens barrel, when the lens frame moves in the optical axis direction with respect to the cam frame by the cam member and the cam groove, the lens frame moves in the optical axis direction with respect to the cam frame. At this time, since the protrusion of the cam frame is inserted into the through hole of the lens frame, the distance between the cam frame and the lens frame in the optical axis direction can be increased, and the dimension of the lens barrel in the optical axis direction when stored. Can be shortened.
On the other hand, when a large external force is applied to the lens barrel, the cam member may be damaged.
However, since the protruding portion of the lens frame is inserted into the auxiliary groove of the cam frame through a gap, when the external force is applied to the lens barrel and the cam frame or the lens frame is elastically deformed, the protruding portion contacts the wall surface of the auxiliary groove. To do. As a result, the external force applied to the lens barrel can be distributed not only to the cam member and the cam groove but also to the protruding portion and the auxiliary groove, thereby preventing the member from being damaged.
In particular, since the end portion of the auxiliary groove on the protruding portion side is disposed between two adjacent protruding portions in the circumferential direction, the size of the notched portion between the protruding portions is limited by the auxiliary groove. Therefore, the size of the protrusion can be increased in the optical axis direction.

As described above, in this lens barrel, it is possible to further reduce the size while preventing the member from being damaged.
The lens barrel according to the second feature includes a first frame, a second frame, and a third frame. The first frame has at least three rectilinear grooves extending in the optical axis direction of the optical system. The second frame has a second frame main body disposed radially inward of the first frame, and at least three guide members projecting radially outward from the second frame main body. The third frame has a third frame body disposed between the first frame and the second frame body in the radial direction, at least three rectilinear protrusions protruding radially outward from the third frame body and inserted into the rectilinear grooves, At least three through-grooves through which the guide member penetrates in the radial direction, and at least three insertion openings that are arranged in communication with the through-grooves at positions corresponding to the rectilinear projections and extend radially outward from the guide member And have.

In this lens barrel, since the guide member can be introduced into the through groove through the insertion opening of the third frame, the first frame, the second frame, and the third frame can be easily assembled. Furthermore, since the insertion port is disposed at a position corresponding to the rectilinear projection, a decrease in strength due to the insertion port can be prevented. That is, with this lens barrel, it is possible to prevent a decrease in strength while ensuring assemblability.
A lens barrel according to a third feature is a lens barrel for supporting an optical system having a first lens element and a second lens element, and includes a first lens support frame, a second lens support frame, And a support member. The first lens support frame includes a second lens frame main body that supports the first lens element, a first rectilinear groove that is formed on an outer peripheral portion of the second lens frame main body and extends in the optical axis direction of the optical system, and a second lens frame. The outer periphery of the main body includes a first rectilinear groove and a second rectilinear groove that is disposed on the opposite side of the first lens element and extends in the optical axis direction. The second lens support frame includes a second main body portion that supports the second lens element, a third rectilinear groove that is formed in the outer peripheral portion of the second main body portion and extends in the optical axis direction, and an outer peripheral portion of the second lens frame main body. In addition, a third rectilinear groove and a fourth rectilinear groove disposed on the opposite side across the second lens element and extending in the optical axis direction are provided. The support member includes an annular portion, a portion projecting from the annular portion in the optical axis direction, a first support portion inserted into the first rectilinear groove and the third rectilinear groove, and a portion projecting from the annular portion in the optical axis direction. And it has the 2nd support part inserted in the 2nd rectilinear advance slot and the 4th rectilinear advance slot.

In this lens barrel, the first support portion protruding in the optical axis direction from the annular portion is inserted into the first rectilinear groove of the first lens support frame and the third rectilinear groove of the second lens support frame, and the annular portion A second support portion projecting in the optical axis direction is inserted into the second rectilinear groove of the first lens support frame and the fourth rectilinear groove of the second lens support frame. Thus, since the first lens support frame and the second lens support frame are supported by the first support portion and the second support portion, the first lens support frame and the second lens support frame are The area on the outer peripheral side of the second lens support frame can be effectively used, and the size in the radial direction can be reduced.
Further, since the first support portion is inserted into the two rectilinear grooves and the second support portion is inserted into the two rectilinear grooves, the two lens frames can be supported by the support member so as to be movable. Therefore, compared with the case where two lens frames are supported by different members, the members can be shared, and the installation space for the members can be reduced.

As described above, the entire lens barrel can be downsized.
A shake correction apparatus according to a fourth feature includes a correction lens frame, a base frame, a first drive unit, and a second drive unit. A correction lens included in the optical system is fixed to the correction lens frame. The base frame supports the correction lens frame to be rotatable around a rotation axis parallel to the optical axis of the correction lens, and supports the correction lens frame to be movable in a first direction orthogonal to the optical axis. The first drive unit drives the correction lens frame in the first direction with respect to the base frame. The second drive unit drives the correction lens frame in a second direction orthogonal to the rotation axis and the first direction with respect to the base frame. The base frame includes a base frame main body, a rotation shaft that supports the correction lens frame so as to be rotatable about the rotation axis with respect to the base frame main body, and a correction lens frame that is perpendicular to the optical axis with respect to the base frame main body. A first support shaft that is movably supported; and a second support shaft that movably supports the correction lens frame in a plane perpendicular to the optical axis with respect to the base frame body. The first support shaft and the second support shaft are arranged at positions different from the first drive unit and the second drive unit when viewed from a direction parallel to the optical axis.

In this shake correction device, the first support shaft and the second support shaft are arranged at positions different from the first drive unit and the second drive unit when viewed from a direction parallel to the optical axis. Compared with the case where the first drive unit and the first support shaft are disposed at the same position, the apparatus can be made thinner.
A cam frame according to a fifth feature is a cam frame used in a lens barrel that supports an optical system, and includes a substantially cylindrical cam frame main body, at least three cam grooves formed in the cam frame main body, A first cutout formed at the end of the cam frame body and recessed in the optical axis direction of the optical system, and provided at an end opposite to the first cutout of the cam frame main body, protrudes radially outward from the cam frame main body. An annular flange portion.
In this cam frame, an annular flange portion is provided at the end opposite to the first cutout portion of the cam frame main body. Therefore, unnecessary light incident on the outer peripheral side of the cam frame main body through the first cutout portion is provided. At least a part can be blocked by the flange portion, and a decrease in optical performance can be suppressed.

  As described above, in this appendix, a plurality of the invention exert various effects have been disclosed. Here, while preventing breakage of the member, the invention can provide a lens barrel capable of realizing further miniaturization is disclosed. Another invention that it is possible to reduce the size of the lens barrel is disclosed. Another invention that can realize the thinning of the shake correction apparatus is disclosed. Another invention can provide a cam frame that can suppress deterioration in optical performance is disclosed.

  For miniaturization if the lens barrel according to the present invention is possible, the present invention is useful in the field of optics.

DESCRIPTION OF SYMBOLS 1 Digital camera 2 Exterior part 3 Lens barrel 10 Master flange (an example of a base member, an example of a base plate)
11 Tapered portion 20 Fixed frame (an example of a first frame)
21 fixed frame body 22 drive gear 23 inclined groove 25 rotation groove 27 rectilinear groove 30 drive frame (an example of the fourth frame)
31 Drive frame body (an example of a fourth frame body)
32 Gear portion 34 Cam pin 35 Introduction groove 36 First rotation groove 37 Second rotation groove 38 Straight movement groove 40 Camera cam frame (an example of a third frame)
41 Camera cam frame main body (example of third frame main body)
42 Through cam groove (example of through groove)
43 1st rotation protrusion 44 2nd rotation protrusion 46 Straight advance pin 47 1st straight advance groove 48 2nd straight advance groove 49 3rd straight advance groove 50 Lens barrier 51 Barrier mechanism 53 Opening and closing lever 60 1st lens frame (an example of a lens frame)
61 First lens frame body (an example of a lens frame body)
62 Flange part 63 1st rectilinear pin 64 2nd rectilinear pin 66 Notch (an example of a 2nd notch part)
67a 1st opening part ((an example of a through-hole)
68 First cam pin (an example of a cam member)
69 Second cam pin (example of protrusion)
70 Rotating cam frame (an example of a cam frame, an example of a second frame)
71 Cam frame body (example of second frame body)
72 First cam groove (an example of a cam groove)
73 Second cam groove (an example of auxiliary groove)
74a Third cam groove 74b Fourth cam groove 75 Rotating protrusion 76 Cam pin (an example of a guide member)
77 Flange portion 77a Flange body 77b Tubular portion 77c Stopper 78 Projection portion 79 Notch (an example of a first notch portion)
80 Second rectilinear frame 81 Second rectilinear frame body 81a Protrusion 82 First plate (an example of the first part and the second part)
83 2nd plate (an example of the 3rd part and the 4th part)
84a-84c Straight advance pin 85 Support plate (an example of a 1st support part and a 2nd support part)
90 4th lens frame 95 Shutter unit 100 1st rectilinear frame 101 1st protrusion 102 2nd protrusion 105 Rotating groove 107 1st rectilinear groove 108 2nd rectilinear groove 109 1st rectilinear frame main body 110 Zoom motor unit 120 Focus motor unit 130 Light shielding Sheet 131 bonding part (an example of a first light shielding part)
132 Enlarged part (an example of a second light shielding part)
135 IR absorbing glass (an example of an optical element)
140 Image sensor unit 141 CCD image sensor (an example of an image sensor)
142 CCD sheet metal (an example of a fixed plate)
143 CCD cover glass 170 Decorative ring 171 Shielding ring 190 Second lens frame 191 Second lens frame body 193 Straight guide groove (an example of a first straight groove and a second straight groove)
194 Guide part (an example of the first sliding part and the second sliding part)
200 Third lens frame 210 Correction lens frame 211 Support frame body 212 First guide portion 215 Restricting portion 216 First guide member 217 Second guide member 220 Base frame 222 Rotating shaft 223 Straight guide groove (third straight drive groove and fourth straight drive groove) Example of groove)
224 guide part (an example of the third sliding part and the fourth sliding part)
225 Regulating shaft 226 First support shaft 227 Second support shaft 233 Pitching direction drive coil 234 Yawing direction drive coil 235 Pitching magnet 236 Yawing magnet 237 Pitching yoke 238 Yawing yoke 241 First drive unit 242 Second drive unit A Optical axis G1 First 1 lens group (an example of a lens element)
G2 Second lens group G3 Third lens group (an example of a correction lens)
G4 Fourth lens group D1 First center line D2 Second center line D3 Reference line segment G Center of gravity

Claims (11)

A base plate having an opening;
An image sensor that converts light passing through the aperture into an electrical signal;
A fixed plate separate from the base plate, which supports the imaging device and is fixed to the base plate;
A light-shielding sheet having an annular first light-shielding part provided on the light-receiving surface side of the imaging element, and a second light-shielding part disposed outside the first light-shielding part and having an outer shape larger than the opening ;
A transparent cover provided on the imaging element surface,
The first light shielding portion is in contact with the transparent cover;
The second light-shielding portion is in contact with the base plate;
Image sensor unit.   Further comprising a plate-like optical element performing optical processing for light passing through the opening,
  The first light shielding portion is fixed to the optical element by adhesion.
Image sensor unit according to claim 1.   The optical element is disposed in the opening;
Image sensor unit according to claim 2.   The optical element is smaller than said opening,
Image sensor unit according to claim 3.   The first light-shielding portion is fixed to the transparent cover by bonding;
The image sensor unit according to claim 1.   The second light shielding part is not fixed to the base plate.
The imaging device unit according to claim 1. A base plate having an opening;
An image sensor that converts light passing through the aperture into an electrical signal;
A fixed plate that supports the imaging device and is fixed to the base plate;
A light-shielding sheet having an annular first light-shielding part provided on the light-receiving surface side of the imaging element, and a second light-shielding part disposed outside the first light-shielding part and having an outer shape larger than the opening. ,
The second light-shielding portion is bent in contact with the base plate ;
Image sensor unit. A base plate having an opening;
An image sensor that converts light passing through the aperture into an electrical signal;
A fixed plate that supports the imaging device and is fixed to the base plate;
A light-shielding sheet having an annular first light-shielding part provided on the light-receiving surface side of the imaging element, and a second light-shielding part disposed outside the first light-shielding part and having an outer shape larger than the opening. ,
The base plate has an inclined surface formed around the opening and inclined with respect to the light receiving surface of the imaging element;
The second light shielding portion is in contact with the inclined surface;
Image sensor unit. The inclined surface is inclined so that the second light-shielding portion can be closely attached as a whole,
The image sensor unit according to claim 8. It further comprises a plate-like optical element that performs optical processing on the light passing through the opening,
The first light shielding portion is fixed to the optical element by adhesion.
The image sensor unit according to claim 7. The optical element is disposed in the opening;
The image sensor unit according to claim 10.

Images