WO2013114900A1

WO2013114900A1 - Lens barrel

Info

Publication number: WO2013114900A1
Application number: PCT/JP2013/000587
Authority: WO
Inventors: 広康藤中; 小西　章雄
Original assignee: パナソニック株式会社
Priority date: 2012-02-02
Filing date: 2013-02-01
Publication date: 2013-08-08

Abstract

　Provided is a lens barrel that enables the stable positioning of a retractable lens frame. A lens barrel (20) is equipped with a holding frame (400), a retractable lens frame (401) and an impelling member (403). The retractable lens frame (401) has a lens and moves around a retractable shaft (501) which is substantially parallel to the optical axis in the transition period between a shooting mode and a stored mode. The impelling member (403) is held by the holding frame (400), and impels the retractable lens frame (401) around the retractable shaft (501). One among the holding frame (400) and the retractable lens frame (401) has the retractable shaft (501). The other among the holding frame (400) and the retractable lens frame (401) has a shaft receiving portion (601) that engages with the retractable shaft (501). The shaft receiving portion (601) has a contact surface (601a) that makes contact with the retractable shaft (501). The contact surface (601a) is impelled towards the retractable shaft (501) by the impelling member (403).

Description

Lens barrel

The technology disclosed herein relates to a lens barrel provided with an optical system.

Conventionally, a lens barrel having a secondary optical system that can be retracted with reference to the main optical system has been disclosed (see Patent Document 1).

JP-A-63-138320

In the prior art, the secondary optical system held by the secondary optical system holder can be retracted from the primary optical system by inserting the support shaft into the bearing hole. However, with this configuration, there is a possibility that the support shaft may rattle inside the bearing hole. That is, there is a possibility that the positioning accuracy of the sub optical system holder cannot be sufficiently ensured.
The technology disclosed herein has been made in view of the above problems, and an object of the present invention is to stably position the retractable lens frame.

The lens barrel disclosed herein includes a holding frame, a retracting lens frame, and an urging member. The retractable lens frame has a lens, and moves around a retracted axis that is substantially parallel to the optical axis with respect to the retaining frame during the transition period between the photographing enabled state and the retracted state. The biasing member is held by the holding frame and biases the retractable lens frame around the retracting shaft. Either one of the holding frame and the retracting lens frame has a retracting shaft. One of the holding frame and the retracting lens frame has a bearing portion that engages with the retracting shaft. The bearing part has at least two contact surfaces that contact the retracting shaft. At least two contact surfaces are biased toward the retracting shaft by a biasing member.

According to the technology disclosed herein, a lens barrel capable of stably positioning the retractable lens frame can be provided.

Perspective view of digital camera Perspective view of lens barrel (collapsed state) Perspective view of lens barrel (wide state) Disassembled perspective view of lens barrel Perspective view of master flange and shutter unit Cross section of master flange and shutter unit Enlarged side view of the escape cam of the master flange Perspective view of shutter unit, OIS frame, and retractable lens frame Enlarged perspective view of shutter unit A view of the OIS frame with the retractable lens frame from the image sensor side Sectional view near the shaft holder Sectional view of the vicinity of the rotation stopper The figure which shows the rail part of an OIS frame, and the movement range of a 3rd lens group. Perspective view of OIS frame with retractable lens frame A view of the OIS frame with the retractable lens frame viewed from the image sensor side (photographable state) View of the OIS frame with the retractable lens frame viewed from the image sensor side (collapsed state) Side view of retractable lens frame Sectional view of the shaft holder cut by a plane perpendicular to the shaft core The figure which shows a response | compatibility with a retractable lens frame and a rotation spring (the 1) The figure which shows a response | compatibility with a retractable lens frame and a rotation spring (the 2) Sectional drawing which shows the positional relationship of a 3rd lens group and a contact part. The figure which shows arrangement | positioning of an actuator and a retractable lens frame Schematic sectional view of the lens barrel (collapsed state) Schematic cross section of lens barrel (wide state) Schematic cross section of lens barrel (telephoto state) The expanded sectional view of the state where the retractable lens frame was engaged with the detent portion of the OIS frame according to another embodiment

Next, embodiments of the present invention will be described with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, the drawings are schematic, and the ratio of each dimension may be different from the actual one. Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

In the following embodiments, a digital camera will be described as an example of the imaging device. In the following explanation, the subject side is “front”, the opposite side of the subject is “rear”, the vertical upper side is “up”, the vertical lower side is “lower”, and the subject is facing the subject, with a digital camera in landscape orientation as a reference. The right side is expressed as “right”, and the left side toward the subject is expressed as “left”. The landscape orientation is a kind of orientation of the digital camera. When photographing in the landscape orientation, the long side direction of the horizontally long rectangular image substantially coincides with the horizontal direction in the image.

1. Overall Configuration of Digital Camera The configuration of the digital camera 1 will be described with reference to the drawings. FIG. 1 is a perspective view of the digital camera 1. 2 and 3 are perspective views of the lens barrel 20. 2 shows the lens barrel 20 in the retracted state, and FIG. 3 shows the lens barrel 20 in the wide state.
As shown in FIG. 1, the digital camera 1 includes a housing 10 and a lens barrel 20.
The housing 10 includes a front plate 11, a rear plate 12, and a side plate 13. The front plate 11 has an opening 10S.
The lens barrel 20 includes a three-stage retractable zoom mechanism. The lens barrel 20 is housed in the housing 10 when not photographing, and is drawn forward from the opening 10S when photographing. Specifically, as shown in FIGS. 2 and 3, the lens barrel 20 includes a first movable barrel portion 21, a second movable barrel portion 22, a third movable barrel portion 23, and a fixed barrel. Part 24.

The first movable barrel portion 21 can be extended with respect to the fixed barrel portion 24. The second movable lens barrel portion 22 can be extended with respect to the first movable lens barrel portion 21. The third movable lens barrel portion 23 can be extended with respect to the second movable lens barrel portion 22. The fixed barrel portion 24 is fixed in the housing 10. As shown in FIG. 3, when the lens barrel 20 is extended, the third moving barrel portion 23 is located in the foremost position among the first to third moving barrel portions 21 to 23.

2. Next, the configuration of the lens barrel 20 will be described with reference to the drawings. FIG. 4 is an exploded perspective view of the lens barrel 20.
The first to third movable lens barrel portions 21 to 23 of the lens barrel 20 are extended from the fixed barrel portion 24 along the optical axis AX of the optical system. The optical system includes first to fifth lens groups L1 to L5. In the following description, the direction parallel to the optical axis AX is “optical axis direction”, the direction perpendicular to the optical axis direction is “radial direction”, and the direction along the circle centered on the optical axis AX is “circumferential direction”. ". The optical axis AX substantially coincides with the axis of each frame constituting the lens barrel 20.

As shown in FIG. 4, the lens barrel 20 includes a fixed frame 100, a master flange 105, a first rectilinear frame 110, a second rectilinear frame 120, a third rectilinear frame 130, a first rotating frame 210, and a second rotating frame 220. , First decorative frame 310, second decorative frame 320, second lens group frame F2, third lens group frame F3, fourth lens group frame F4, and fifth lens group frame F5.
In the present embodiment, the fixed frame 100 and the master flange 105 constitute a fixed barrel portion 24. In addition, the first rectilinear frame 110 constitutes the third moving lens barrel part 23, and the third rectilinear frame 130, the first rotating frame 210, and the second decorative frame 320 constitute the second moving lens barrel part 22, The second rectilinear frame 120 and the second rotating frame 220 constitute the first moving lens barrel 21.

The fixed frame 100 is formed in a cylindrical shape. The fixed frame 100 has a rectilinear groove a1 and a cam groove b1 formed on the inner peripheral surface. A zoom motor 101 and a zoom gear 102 are attached to the outer peripheral surface of the fixed frame 100. The zoom motor 101 is a drive source for extending the first to third movable lens barrel portions 21 to 23. The zoom gear 102 transmits the driving force of the zoom motor 101 to the second rotary frame 220.

The master flange 105 is a plate-like resin member that covers the rear of the fixed frame 100. The image sensor 103 is fitted in the center of the master flange 244.
The first rectilinear frame 110 is formed in a cylindrical shape and is disposed outside the first rotating frame 210. The first rectilinear frame 110 includes a rectilinear groove a2 and a cam protrusion B2. The rectilinear groove a2 is formed along the optical axis direction on the inner peripheral surface. Cam protrusion B2 is arrange | positioned at the rear-end part of an internal peripheral surface. The cam protrusion B2 is engaged with a cam groove b2 of the first rotating frame 210 described later. The first rectilinear frame 110 holds a first lens unit L1 for taking light into the lens barrel 20. A first decorative frame 310 is covered on the first rectilinear frame 110.

The second rectilinear frame 120 is formed in a cylindrical shape, and is disposed inside the first rectilinear frame 110. The second rectilinear frame 120 includes a flange portion 121, a rectilinear projection A1, a bayonet projection E1, a rectilinear projection A31, a rectilinear groove a32, and a cam groove b3. The flange portion 121 is formed in an annular shape, and is erected at the rear end portion of the outer peripheral surface. The rectilinear projection A <b> 1 is erected on the outer peripheral surface of the flange portion 121. The rectilinear projection A1 is engaged with the rectilinear groove a1 of the fixed frame 100. The bayonet protrusion E1 is erected on the outer peripheral surface of the flange portion 121. The bayonet protrusion E1 is engaged with a bayonet groove e1 of the second rotating frame 220 described later. The rectilinear projection A31 is formed along the optical axis direction on the outer peripheral surface. The rectilinear protrusion A31 is engaged with a rectilinear groove a3 of a third rectilinear frame 130 described later. The rectilinear groove a32 is formed along the rectilinear protrusion A31 on the outer peripheral surface. A rectilinear protrusion A32 of a third rectilinear frame 130 described later is engaged with the rectilinear groove a32. The cam groove b3 is formed so as to intersect the optical axis direction on the outer peripheral surface.

The third rectilinear frame 130 is formed in a cylindrical shape and is disposed inside the second rectilinear frame 120. The third rectilinear frame 130 includes a rectilinear protrusion A2, a rectilinear protrusion A32, a rectilinear groove a31, a bayonet protrusion E2, a through groove c1, and a through groove c2. The rectilinear projection A2 is erected on the front end portion of the outer peripheral surface. The rectilinear protrusion A2 is engaged with the rectilinear groove a2 of the first rectilinear frame 110. The rectilinear protrusion A32 is formed along the optical axis direction on the outer peripheral surface. The rectilinear protrusion A32 is engaged with the rectilinear groove a32 of the second rectilinear frame 120. The rectilinear groove a31 is formed along the rectilinear protrusion A32 on the outer peripheral surface. The rectilinear protrusion A31 of the second rectilinear frame 120 is engaged with the rectilinear groove a31. The bayonet protrusion E2 is formed along the circumferential direction on the outer peripheral surface. The bayonet protrusion E2 is engaged with a bayonet groove e2 of the first rotating frame 210 described later. The through groove c1 and the through groove c2 penetrate the frame main body from the inner peripheral surface to the outer peripheral surface, and are formed along the optical axis direction.

The first rotating frame 210 is formed in a cylindrical shape and is disposed inside the first rectilinear frame 110. The first rotating frame 210 includes a bayonet protrusion E3, a rectilinear protrusion A4, a cam protrusion B3, a cam groove b2, a cam groove b4, and a cam groove b5. The bayonet protrusion E3 is formed along the circumferential direction at the rear end portion of the outer peripheral surface. The bayonet protrusion E3 is engaged with a bayonet groove e3 of the second decorative frame 320 described later. The rectilinear projection A4 is erected on the outer peripheral surface of the bayonet projection E3. The rectilinear protrusion A4 is engaged with a rectilinear groove a4 of the second rotary frame 220 described later. Cam protrusion B3 is arrange | positioned on an internal peripheral surface. The cam protrusion B3 is engaged with the cam groove b3 of the second rectilinear frame 120. The cam groove b2 is formed so as to intersect the optical axis direction on the outer peripheral surface. The cam groove b4 and the cam groove b5 are formed so as to intersect the optical axis direction on the inner peripheral surface.

The second rotating frame 220 is formed in a cylindrical shape and is disposed inside the fixed frame 100. The second rotary frame 220 includes a gear portion 221, a cam projection B1, a straight groove a4, and a bayonet groove e1. The gear portion 221 is formed along the circumferential direction at the rear end portion of the outer peripheral surface. When the gear portion 221 is engaged with the zoom gear 242, the second rotating frame 220 is rotated in the circumferential direction by the driving force of the zoom motor 101. The cam protrusion B1 is engaged with the cam groove b1 of the fixed frame 100. The rectilinear groove a4 is formed along the optical axis direction on the inner peripheral surface. The rectilinear protrusion A4 of the first rotating frame 210 is engaged with the rectilinear groove a4. The bayonet groove e1 is formed along the circumferential direction at the rear end portion of the inner peripheral surface. The bayonet protrusion e1 of the first rectilinear frame 110 is engaged with the bayonet groove e1.

The first decorative frame 310 covers the outer periphery and the front surface of the first rectilinear frame 110. The first decorative frame 310 has an opening for taking in light from the outside. The first lens unit L1 is disposed inside the opening of the first rectilinear frame 110.
The second decorative frame 320 is formed in a cylindrical shape and is disposed outside the first rotating frame 210. The second decorative frame 320 has a rectilinear protrusion A41 and a bayonet groove e3. The rectilinear projection A4 is erected on the rear end portion of the outer peripheral surface. The rectilinear protrusion A41 is engaged with the rectilinear groove a4 of the second rotating frame 220. The bayonet groove e3 is formed along the circumferential direction at the rear end portion of the inner peripheral surface. A bayonet protrusion E3 of the first rotation frame 210 is engaged with the bayonet groove e3.

The second lens group frame F2 is formed in a disc shape and is arranged inside the third rectilinear frame 130. The second lens group frame F2 holds a second lens group L2 used for zooming. The second lens group frame F2 has a cam projection B4 standing on the outer peripheral surface. The cam protrusion B4 is inserted into the through groove c1 of the third rectilinear frame 130 and is engaged with the cam groove b4 of the first rotating frame 210.

The third lens group frame F3 has a shutter unit and an OIS (Optical Image Stabilizer) unit. The shutter unit holds an OIS unit. The shutter unit is formed in a cylindrical shape and is disposed inside the third rectilinear frame 130. The third lens group frame F3 has a built-in shutter mechanism. The third lens group frame F3 has a cam projection B5 standing on the outer peripheral surface. The cam protrusion B5 is inserted into the through groove c2 of the third rectilinear frame 130 and is engaged with the cam groove b5 of the first rotating frame 210.

An OIS (Optical Image Stabilizer) unit mainly includes an OIS frame 400 and a retractable lens frame 401.
The OIS frame 400 is attached to the shutter frame 335. The OIS frame 400 is movable in a plane perpendicular to the optical axis. For example, the OIS frame 400 is moved in a plane perpendicular to the optical axis by an actuator.

The retractable lens frame 401 is held by the OIS frame 400 so as to be movable around a retracted axis substantially parallel to the optical axis. The retractable lens frame 401 holds the third lens unit L3 for image blur correction. The third lens unit L3 includes at least one lens. The retractable lens frame 401 moves from a correctable position (first attitude) where the third lens group L3 can perform image blur correction to a retracted position (second attitude) where the third lens group L3 is retracted from the optical axis. Its position can be changed.
The fourth lens group frame F4 is supported by the fixed frame 100. The fourth lens group frame F4 holds a fourth lens group L4 used for focusing.
The fifth lens group frame F5 is supported by the master flange 105. The fifth lens group frame F5 holds the fifth lens group L5.

3. Detailed configuration of members constituting the lens barrel In “2. Lens barrel configuration”, the outline of each member has been described. Here, the configuration of the master flange 105, the configuration of the third lens group frame F3, and the like. Will be described in more detail.

3-1. Master Flange As shown in FIG. 5, the master flange 105 includes a master flange main body portion 106 (first main body portion), a master flange restriction portion 107 (first restriction portion), a first retracting cam 125, 2 evacuation cams 126. The first main body portion 106 is formed in a disc shape. The above-described image sensor 103 is attached to the center of the first main body 106.
The first restricting unit 107 restricts the movement of the OIS frame 400. Specifically, the first restricting unit 107 engages with the OIS unit 251 and restricts the movement of the OIS frame 400. Specifically, the first restricting unit 107, when the lens barrel 20 shifts from the shootable state to the retracted state (or when the lens barrel 20 shifts from the retracted state to the shootable state), Engages with the OIS unit 251 to restrict the movement of the OIS frame 400. Here, the phrase “when the lens barrel shifts from the shootable state to the retracted state” is used as a phrase including the meaning “when the lens barrel shifts from the retracted state to the shootable state” There is.

As shown in FIGS. 5 and 6, in detail, the first restricting portion 107 is formed integrally with the first main body portion 106. Specifically, the first restricting portion 107 includes two protruding portions 108 that protrude outward from the first main body portion 106. The two protrusions 108 engage with the OIS frame 400 of the OIS unit 251. As shown in FIG. 6, the two protruding portions 108 are in contact with the inner peripheral portion 120 a of the second rectilinear frame 120. Thereby, the fall of the two protrusions 108 is prevented.

An inclined portion is formed on the inner peripheral side of the tip of each protrusion 108. This inclined portion guides the OIS frame 400 from a movable posture in which the OIS frame 400 can move (posture in a photographing enabled state) to a movable restriction posture that restricts the movement of the OIS frame 400.
An inner peripheral portion (including a portion excluding the distal end portion (inclined portion) and the central portion) on the proximal end side of each protruding portion is formed in a planar shape. The inner peripheral portion is a portion that holds the OIS frame 400 in a movable restriction posture. By guiding the OIS frame 400 from the inclined portion on the distal end side to the inner peripheral portion on the proximal end side, the in-plane movement of the OIS frame 400 can be reliably regulated. In addition, the form which controls the in-plane movement of the OIS frame 400 will be described in detail in the description of the OIS frame 400 (engagement portion).

As shown in FIGS. 5 and 7, the first retracting cam 125 is a portion that is formed integrally with the master flange 105 and is long in one direction. The first retraction cam 125 has a first guide part 125a, a second guide part 125b, and a holding part 125c.
The first guide part 125 a contacts the pressing part 605 of the retractable lens frame 401 to retract the retractable lens frame 401. The first guide portion 125 a is a portion that is formed to be inclined at the tip of the first retraction cam 125.

In a state where the first guide portion 125a is in contact with the pressing portion 605, the OIS frame 400 can be moved by the protruding portion 108 from a movable posture in which the OIS frame 400 can move (posture in a photographing enabled state). It is guided to the posture to restrict (movable restricted posture).
The second guide part 125b abuts on the pressing part 605 of the retractable lens frame 401 to further retract the retractable lens frame 401. The second guide part 125b is formed continuously with the first guide part 125a, and is formed at an angle different from that of the first guide part 125a. In a state where the second guide portion 125b is in contact with the pressing portion 605 of the retractable lens frame 401, the OIS frame 400 is in the movable restriction posture.

The holding portion 125c is a portion that temporarily holds the retractable lens frame 401 at the retracted position. The retractable lens frame 401 is finally positioned by a second retracting cam 126 described later. The holding part 125c is formed linearly in the optical axis direction. In a state where the holding portion 125c is in contact with the pressing portion 605 of the retractable lens frame 401, the OIS frame 400 is in the movable restriction posture.
The second retracting cam 125 is a part for finally positioning the retracting lens frame 401. As shown in FIG. 5, the second retracting cam 126 is formed between the two protruding portions 108. The second retracting cam 125 has an inclined portion. By this inclined portion, the retractable lens frame 401 is guided to the retracted position and positioned at the retracted position.

3-2. Third lens group frame 3-2-1. Shutter Unit As shown in FIG. 8, the shutter unit 250 is included in the third lens group frame F3. The shutter unit 250 (an example of the second frame) is engaged with the third rectilinear frame 130 and the first rotating frame 210 as described above. The shutter unit 250 is supported by the master flange 105 (an example of a first frame).

As shown in FIG. 9, the shutter unit 250 includes a restriction part 420 (second restriction part) for restricting the movement of the OIS frame 400 and a first stress distribution part 511 of the OIS frame 400 (to be described later). And a second stress dispersion portion 422 (contact portion of the shutter unit) that contacts the contact portion) (see FIG. 19). The second stress distribution portion 422 is formed in an arc shape having a predetermined width. Details of the first stress dispersion portion 511 will be described later.
Further, the shutter unit 250 further includes a step portion 423. The step portion 423 is formed on the surface facing the OIS frame 400. When the retractable lens frame 401 changes its posture (position) from the first posture to the second posture (retracted posture), a storage portion 550 of the retractable lens frame 401, which will be described later, is disposed in the step portion 423. The Thereby, the compactness of an optical axis direction can be achieved.

3-2-2. OIS Unit As shown in FIG. 8, the shutter unit 250 is included in the third lens group frame F3. The OIS unit 251 is disposed between the master flange 105 and the shutter unit 250. The OIS unit 251 is attached to the shutter unit 250. The OIS unit 251 (an example of a first unit) includes an OIS frame 400 (an example of a holding frame), a retractable lens frame 401, a thrust spring 402 (an example of a first biasing unit), and a rotating spring 403 (a second attachment). An example of a biasing means, and an example of a biasing member.
(OIS frame)
The OIS frame 400 (an example of a holding frame) is held by the shutter unit 250. The OIS frame 400 is configured to be movable with respect to the shutter unit 250 in a plane perpendicular to the optical axis AX. The OIS frame 400 is moved in a plane perpendicular to the optical axis AX by the actuator 520.

As shown in FIGS. 8 and 10-13, the OIS frame 400 includes a main body portion 500 (second main body portion) of the OIS frame 400, a retracting shaft portion 501, a rotation preventing portion 502, and at least three rail portions. 503 and an engaging portion 504 (see FIGS. 5 to 6).
As shown in FIG. 8, the 2nd main-body part 500 is formed in the substantially disc shape. The second main body 500 has an accommodating portion 550 for accommodating the retractable lens frame 401. The accommodating portion 550 has two connecting portions 550a facing each other. The connecting part 550 a is formed integrally with the second main body part 500. Specifically, the connecting portion 550a is a second main body portion so that a central portion between the two connecting portions 550a is located at a substantially central portion in the optical axis direction (substantially central portion in the thickness direction) of the shutter unit 250. 500 is integrally formed.

As shown in FIGS. 8 and 11, the retracting shaft portion 501 is formed in the second main body portion 500. The retracting shaft portion 501 has a cylindrical portion 501a and a retracting shaft 501b. The cylindrical part 501 a is formed on the outer peripheral part of the second main body part 500. The retracting shaft 501b is formed in the second main body 500. Specifically, the retracting shaft 501b is formed in the second main body portion 500 so as to protrude inward of the cylindrical portion 501a.

As shown in FIGS. 10 and 12, the rotation prevention unit 502 restricts the movement of the retractable lens frame 401 by the rotation spring 403. The anti-rotation part 502 is formed to protrude outward from the second main body part 500. The rotation stopper 502 has an inclined surface 502a. The inclined surface 502a is a part that guides the retractable lens frame 401 in a direction approaching the OIS frame 400 (second main body 500). The inclined surface 502a is inclined while facing the second main body 500. In other words, the inclined surface 502a is inclined with respect to the optical axis AX.

Although an example in which the inclined surface 502a is inclined at one angle is shown here, the inclined surface 502a may be formed to be inclined in multiple stages. Further, the inclined surface 502a may be formed to be inclined in a curved surface shape.
As shown in FIGS. 10 and 13, at least three rail portions 503, for example, three rail portions 503 (503 a to 503 c) are formed in the second main body portion 500. Each rail portion 503 is formed on one surface of a substantially disc-shaped second main body portion 500. Each rail portion 503 is formed on the second main body portion 500 at a position facing a contact portion 603 (a first contact portion 603A and a second contact portion 603B described later) formed on the retractable lens frame 401. Yes.

In addition, as shown in FIG. 13, when the OIS frame 400 is viewed from the optical axis direction, a portion RM obtained by projecting the range in which the third lens unit L <b> 3 held by the retractable lens frame 401 moves onto the second main body portion 500 In the removed portion, each rail portion 503 is formed in the second main body portion 500. Further, when the lens barrel 20 shifts from the shootable state to the retracted state, the shape corresponds to the locus of movement of the contact portions 603 (first contact portion 603A and second contact portion 603B) described later. Is formed.

As described above, the engaging portion 504 engages with the first restricting portion 107 formed on the master flange 105, for example, the two protruding portions 108 (see FIGS. 5 and 6). As shown in FIG. 14, the engaging portion 504 is formed integrally with the second main body portion 500. Specifically, the engaging portion 504 is a portion that protrudes outward from the outer peripheral portion of the second main body portion 500. These two engaging portions 504 engage with the two protruding portions 108 of the master flange 105 separately. Specifically, each engaging portion 504 is pressed by each protruding portion 108 of the master flange 105. Thereby, the in-plane movement of the OIS frame 400 is restricted.

Specifically, as shown in FIG. 6, when the lens barrel 20 shifts from the photographing enabled state to the retracted state, the OIS frame 400 moves in the optical axis direction with respect to the shutter unit 250. Then, the two protrusions 108 of the master flange 105 are individually engaged with the two protrusions of the OIS frame 400 to restrict movement in the plane of the OIS frame 400. More specifically, first, each engaging portion 504 abuts separately on the inner peripheral side of the distal end portion of each projecting portion 108, and then each engaging portion 504 is an inner side of the proximal end side of each projecting portion 108. It abuts on the circumference (including the portion excluding the tip and the center). Thereby, the OIS frame 400 is guided from the movable posture described above to the movable restricted posture, and movement in the plane of the OIS frame 400 is restricted in the movable restricted posture.

In the overall configuration, the shutter unit 250 and the OIS unit 251 move in the optical axis direction with respect to the master flange 105 when the lens barrel 20 shifts from the shootable state to the retracted state. As the shutter unit 250 and the OIS unit 251 move in the optical axis direction, the master flange 105 engages with the OIS frame 400 as described above, and restricts movement in the plane of the OIS frame 400.

Further, as shown in FIG. 14, the OIS frame 400 further includes a restricted portion 510 and a first stress dispersion portion 511. The regulated portion 510 is a portion that receives the regulating portion 420 of the shutter unit 250. Here, by disposing the restricting portion 420 inside the restricted portion 510, the movement of the OIS frame 400 in the optical axis direction with respect to the shutter unit 250 is restricted. On the other hand, the OIS frame 400 is movable with respect to the shutter unit 250 in a plane perpendicular to the optical axis AX.

The first stress dispersion portion 511 is a portion that comes into contact with the shutter unit 250 when a pressing portion 605 of a retractable lens frame 401 described later is pressed. The first stress dispersion part 511 is provided in the OIS frame 400 at a position closer to the pressing part 605 than the regulated part 510. The first stress dispersion portion 511 is formed in an arc shape having a predetermined width. Here, the width of the first stress dispersion portion 511 is smaller than the width of the second stress dispersion portion 422. Note that the second stress dispersion portion 511 may be formed to have a width smaller than that of the first stress dispersion portion 422.

As shown in FIGS. 10 and 11, the OIS frame 400 further includes a detachment prevention unit 530 (a restriction unit of the OIS frame 400). The detachment prevention unit 530 is a part that restricts the retractable lens frame 401 from detaching from the OIS frame 400 (second main body unit 500). The separation preventing part 530 is formed integrally with the retracting shaft part 501. The separation preventing unit 530 is provided at a predetermined interval from the second main body unit 500. The separation preventing part 530 is formed in the vicinity of the retracting shaft 501b.
(Evacuation lens frame)
The retractable lens frame 401 holds at least one lens. As shown in FIGS. 15A and 15B, the retractable lens frame 401 holds a third lens unit L3 including four lenses. The retractable lens frame 401 is held by the OIS frame 400 (see FIG. 10). Further, the retractable lens frame 401 moves around the retracting shaft 501b that is substantially parallel to the optical axis AX when retracted. As a result, the retractable lens frame 401 is disposed at a position shifted from the optical axis AX when retracted.

As shown in FIGS. 15A and 15B, the retractable lens frame 401 is arranged around the retracting shaft 501b (axial center JX) substantially parallel to the optical axis AX when the lens barrel 20 shifts from the photographing enabled state to the retracted state. Moving. Specifically, the retractable lens frame 401 is moved from the first posture in which the third lens unit L3 can perform camera shake correction when the lens barrel 20 shifts from the shootable state to the retracted state. Changes its position to the second posture retracted from the optical axis AX.

As shown in FIGS. 16 and 17, the retractable lens frame 401 includes a main body portion 600 (third main body portion 600) of the retractable lens frame 401, a shaft holding portion 601 (an example of a bearing portion), and a lens holding portion 602. And a plurality of contact portions 603 (603A to 603C). The shaft holding portion 601 is a portion that engages with the retracting shaft 501b described above (see FIG. 11). The shaft holding unit 601 holds the retracting shaft 501b in a rotatable manner. The shaft holding portion 601 is a hole portion into which the retracting shaft 501 b is inserted, and this hole portion is formed in the third main body portion 600.

As shown in FIG. 17, the shaft holding portion 601 (hole portion) has at least two abutting surfaces 601a that abut against the retracting shaft 501b. Specifically, two contact surfaces 601 a are formed on the inner peripheral surface of the shaft holding portion 601. The two contact surfaces 601a are formed on the shaft holding portion 601 on the proximal end side of the retracting shaft 501b, that is, on the opening side of the shaft holding portion 601 (hole) (see FIG. 11). The two contact surfaces 601a are formed on the inner peripheral surface of the shaft holding portion 601 so as to have a non-parallel relationship. More specifically, the shaft holding portion 601 (hole) is formed on the inner peripheral surface of the shaft holding portion 601 so that the two contact surfaces 601a have an angle when viewed in the depth direction.

As shown in FIG. 17A, the two contact surfaces 601a (hereinafter referred to as V-shaped surfaces) are in contact with the outer peripheral surface of the retracting shaft 501b. Specifically, as shown in FIG. 17A, the retractable lens frame 401 is biased by the biasing force F0 of the rotating spring 403, and the shaft holding portion of the retractable lens frame 401 by the component force F1 of the biasing force F0. The V-shaped surface 601a formed on the 601 is brought into contact with the outer peripheral surface of the retracting shaft 501b. Thereby, the retracting shaft 501b can be reliably positioned with respect to the shaft holding portion 601 of the retracting lens frame 401. Specifically, the accuracy with respect to the eccentricity of the retracting shaft 501b can be improved. In FIG. 17A, the component forces of the urging force F0 are F1 and F2.

16 is a portion that holds the third lens unit L3 (four lenses). The lens holding portion 602 is formed in a substantially cylindrical shape, and holds the third lens group L3 at the inner peripheral portion. In a state where the retractable lens frame 401 is mounted on the shutter unit 250, the lens holding portion 602 is disposed at a substantially central portion (substantially central portion in the thickness direction) of the shutter unit 250 in the optical axis direction.

The plurality of contact portions 603 illustrated in FIG. 16 include, for example, three first contact portions 603A (603A1, 603A2, and 603A3), a second contact portion 603B, and a third contact portion 603C. ing. The three first abutting portions 603A, the second abutting portion 603B, and the third abutting portion 603C are formed in the third main body portion 600 at positions different from the shaft holding portion 601. In other words, the three first abutment portions 603A, the second abutment portion 603B, and the third abutment portion 603C are located at positions different from the retracting shaft 501b held by the shaft holding portion 601. Is formed. In addition, the three first abutting portions 603A, the second abutting portions 603B, and the third abutting portions 603C are located at positions different from the retraction shaft 501b so that they can abut on the OIS frame 400. Part 600 is formed.

Specifically, the two contact portions 603A1 and 603A2 of the three first contact portions 603A and the second contact portion 603B are formed on the third main body portion 600 in the vicinity of the retracting shaft 501b. Yes. The two first contact portions 603A1 and 603A2 are formed on the third main body portion 600 so that the retracting shaft 501b is positioned between the two first contact portions 603A1 and 603A2.

In addition, the second contact portion 603B has a first contact portion 603B positioned between the one contact portion of the two first contact portions 603A1 and 603A2 and the second contact portion 603B. 3 formed on the main body 600. Further, the remaining first contact portion 603A3 excluding these two first contact portions 603A1 and 603A2 and the third contact portion 603C are located on the third main body 600 at a position away from the retracting shaft 501b. Is formed.

Further, as shown in FIG. 16, the first line segment LN1 connecting the optical axis AX of the third lens unit L3 held by the lens holding part 602 and the predetermined first abutting part 603A, and the lens holding part 602. The predetermined first contact portion 603A (603A3) is formed so that the angle formed by the second line segment LN2 connecting the optical axis AX of the third lens unit L3 held by the retractable shaft 501b is an obtuse angle. It is formed in the third main body portion 600. The predetermined first contact portion 603A is at least one contact portion among the three first contact portions 603A. Here, the first contact portion 603A3 formed at the position farthest from the retracting shaft 501b corresponds to the predetermined first contact portion.

In other words, the first contact portion formed at a position away from the retraction shaft 501b so that the predetermined straight line LN3 is located between the predetermined first contact portion 603A3 and the retraction shaft 501b is: It is formed in the third main body portion 600. The predetermined straight line LN3 passes through the optical axis AX of the third lens group L3 held by the lens holding unit 602, and passes through the optical axis AX of the third lens group L3 held by the lens holding unit 602 and the retracting shaft 501b. It is a straight line orthogonal to the second line segment LN2 to be connected.

Furthermore, as shown in FIG. 18, at least one of the three first contact portions 603A (603A1, 603A2, 603A3), the second contact portion 603B, and the third contact portion 603C is: The third main body 600 is formed so as to overlap the third lens unit L3 in a direction perpendicular to the optical axis AX. In other words, at least one of the three first contact portions 603A, the second contact portion 603B, and the third contact portion 603C is within the thickness range D of the third lens group L3. The retractable lens frame 401 is provided so as to overlap the third lens unit L3. Here, the three first contact portions 603A, the second contact portion 603B, and the third contact portion 603C are arranged in the direction perpendicular to the optical axis AX within the thickness range D of the third lens unit L3. The retractable lens frame 401 is provided so as to overlap with the three lens units L3.

Here, at least three of the three first contact portions 603A (603A1, 603A2, 603A3) and the second contact portion 603B shown in FIG. 16 can contact the OIS frame 400. It has become. In other words, at least three of the three first abutting portions 603A and the second abutting portion 603B abut on the OIS frame 400, thereby restricting movement of the retractable lens frame 401 in the optical axis direction. Is done.

Specifically, at least three of the three first abutting portions 603A and the second abutting portion 603B abut on the rail portion 503 (see FIG. 14) of the OIS frame 400, thereby retracting. The movement of the lens frame 401 in the optical axis direction is restricted. Specifically, when the lens barrel 20 is in a photographing enabled state, the three first contact portions 603A1, 603A2, and 603A3 are in contact with the

rail portions

503a, 503b, and 503c of the OIS frame 400, respectively. Here, the first contact portion 603A1 contacts the rail portion 503a, the first contact portion 603A2 contacts the rail portion 503a, and the first contact portion 603A3 contacts the rail portion 503c. In this case, the second contact portion 603B is not in contact with the rail portion 503.

On the other hand, when the lens barrel 20 is in the retracted state, the two first contact portions 603A2, 603A3 and the second contact portion 603B are respectively applied to the

rail portions

503a, 503b, 503c of the OIS frame 400. Touch. Here, when the lens barrel 20 shifts from the photographing enabled state to the retracted state, any one of the three first contact portions 603A, for example, the first contact portion 603A1 is the rail portion. The second contact portion 603B comes into contact with the rail portion 503. In this way, by always abutting at least three of the three first abutting portions 603A and the second abutting portion 603B against the rail portion 503 of the OIS frame 400, the retractable lens frame 401 is provided. Movement in the direction of the optical axis is reliably regulated.

The third abutting portion 603C abuts on the OIS frame 400 when the lens barrel 20 shifts from the photographing enabled state to the retracted state. Details will be described later.
Further, as shown in FIG. 16, the retractable lens frame 401 further includes a pressing portion 605 and an engaging portion 606. The pressing portion 605 is a portion that is pressed when the retractable lens frame 401 shifts from the photographing enabled state to the retracted state. Specifically, when the retractable lens frame 401 shifts from the photographing enabled state to the retracted state, the pressing portion 605 is pressed by the first retracting cam 125 and the second retracting cam 126 provided on the master flange (FIG. 5). See). In this way, when the pressing portion 605 is pressed, the first stress distribution portion 511 (FIG. 14) and the second stress distribution portion 422 (see FIG. 9) can be brought into contact with each other, whereby the regulating portion The load acting on 420 and the regulated portion 510 can be limited.

The engaging portion 606 is a portion that engages with the separation preventing portion 530. In the retractable lens frame 401, the retractable lens frame 401 is provided by disposing the engaging portion 606 between the second main body portion 500 (the main body portion of the OIS frame 400) and the separation preventing portion 530 (see FIG. 11). Detachment in the optical axis direction is restricted. As shown in FIG. 16, the engaging portion 606 is formed integrally with the shaft holding portion 601. The engaging portion 606 is formed in an arc shape. The engaging portion 606 is formed with a notch 606c. By introducing the separation preventing part 530 into the cutout part 606c, the engaging part 606 is disposed between the separation preventing part 530 and the third main body part 600.
(Thrust spring)
The thrust spring 402 is a spring that biases the retractable lens frame 401 against the OIS frame 400. As shown in FIGS. 8 and 11, the thrust spring 402 is attached to at least one of the OIS frame 400 and the retractable lens frame 401.

The thrust spring 402 has a pair of opposing portions 440 and a connecting portion 441 that connects the pair of opposing portions 440. One of the pair of facing portions 440 (first facing portion 440a) is mounted on the OIS frame 400, and the other of the pair of facing portions 440 (second facing portion 440b) is mounted on the retractable lens frame 401. The Specifically, as shown in FIG. 11, in a state where the retracting shaft 501b of the OIS frame 400 is held by the shaft holding portion 601 of the retracting lens frame 401, the first facing portion 440a is attached to the OIS frame 400, 2 Attach the facing portion 440b to the retractable lens frame 401. As a result, the thrust spring 402 holds the OIS frame 400 and the retractable lens frame 401.

As a result, the thrust spring 402 causes at least two contact portions 603 to contact the OIS frame 400. Here, the thrust spring 402 is formed in the vicinity of the retracting shaft 501b (shaft holding portion 601), and at least two of the two first contact portions 603A (603A1, 603A2) and the second contact portion 603B. The contact portion is brought into contact with the OIS frame 400.
(Rotating spring)
The rotation spring 403 is a spring that urges the retractable lens frame 401 around the retracting shaft 501b. The rotating spring 403 shown in FIG. 8 is held by the OIS frame 400. The rotation spring 403 is, for example, a torsion coil spring. As shown in FIGS. 11 and 17B, the coil portion 403 c (coil portion) of the rotating spring 403 is attached to the outer periphery of the cylindrical portion 501 a of the retracting shaft portion 501. One end 403 a of the rotation spring 403 is attached to a groove 444 formed in the OIS frame 400. The other end 403 b of the rotation spring 403 is attached to a groove 445 formed in the retractable lens frame 401.

The third contact portion 603C of the retractable lens frame 401 contacts the inclined surface 502a of the OIS frame 400 by the rotation spring 403 biasing the retractable lens frame 401. Then, the third contact portion 603C is guided to the inclined surface 502a, and the retractable lens frame 401 approaches the OIS frame 400. Thereby, the retractable lens frame 401 is positioned with respect to the OIS frame 400. In this state, the first contact portion 603A3 is in contact with the OIS frame 400.

In this embodiment, as shown in FIG. 17B, when the rotating spring 403 is viewed in the central axis direction of the coil portion 403c, the other end 403B of the rotating spring 403 is formed in a straight line. Alternatively, as shown in FIG. 17C, the other end portion 403b of the rotating spring 403 may be formed in a shape in which the distal end portion 403b2 is bent with respect to the base end portion 403b1 (portion in the vicinity of the coil portion 403c). Good.

Specifically, the distal end portion 403b2 of the rotating spring 403 is bent with respect to the base end portion 403b1 of the rotating spring 403. In other words, the distal end portion 403b2 is bent in the rotation direction of the retractable lens frame 401 with the base end portion 403b1 as a reference. More specifically, the distal end portion 403b2 is bent so as to approach the coil portion 403c with the base end portion 403b1 formed in a straight line as a reference.

In this case, a spring receiving portion 607 is formed on the retractable lens frame 401, and the tip end portion 403 b of the other end 403 b of the rotating spring 403 contacts the spring receiving portion 607.
With this configuration, as shown in FIG. 17C, the V-shaped surface 601a formed on the shaft holding portion 601 of the retractable lens frame 401 is retracted by the component force F1 ′ of the biasing force F0 ′ of the rotating spring 403. It is made to contact | abut to the outer peripheral surface of the axis | shaft 501b. In the case of FIG. 17B, the force F1 ′ for bringing the V-shaped surface 601a of the retractable lens frame 401 into contact with the outer peripheral surface of the retractable shaft 501b is larger than in the case of FIG. 17B (F1 ′> F1). Thereby, the retracting shaft 501b can be more reliably positioned with respect to the shaft holding portion 601 of the retracting lens frame 401. Specifically, the accuracy with respect to the eccentricity of the retracting shaft 501b can be improved more reliably. In FIG. 17B, the component forces of the urging force F0 ′ are F1 ′ and F2 ′.

In addition, the magnitude | size and direction of force F1 'which urges | biases a V-shaped surface toward a retracting shaft change with the formation positions of the V-shaped surface 601a. That is, the formation position of the V-shaped surface 601a and the bending form of the rotation spring 403 in FIG. 17B are examples for explaining the present technology. For this reason, the bending form of the rotating spring 403 is not limited to the above-described embodiment, and any form may be used as long as the force F1 ′ for urging the V-shaped surface toward the retracting shaft can be increased.

3-3. Actuator The actuator 520 is attached to the third lens group frame F3. Specifically, as shown in FIG. 19, the actuator 520 is disposed in the third lens group frame F3 with reference to the effective imaging range YR. The effective imaging range YR is defined by the imaging element 103 attached to the master flange 105. In the present embodiment, the effective imaging range YR is formed in a rectangular shape.
As illustrated in FIG. 19, the actuator 520 includes a first actuator 521 and a second actuator 522. The first actuator 521 moves the OIS frame 400 in the short side direction T1 (first direction) in the effective imaging range YR. The first actuator 521 is disposed on one short side in the effective imaging range YR. The first actuator 521 includes a magnet 521a and a coil 521b. The magnet 521a is attached to the OIS frame 400, and the coil 521b is attached to the shutter unit 250 at a position facing the magnet 521a.

As shown in FIG. 19, the second actuator 522 moves the OIS frame 400 in the long-side direction T2 (second direction) in the effective imaging range YR. The second actuator 522 is larger than the first actuator 521. The second actuator 522 is disposed on one long side in the effective imaging range YR. Specifically, the second actuator 522 is arranged on the lower long side in the effective imaging range YR. The second actuator 522 includes a magnet 522a and two coils 522b. The magnet 522a is attached to the OIS frame 400, and the two coils 522b are attached to the shutter unit 250 at a position facing the magnet 522a. The retractable lens frame 401 moves to the other long side in the effective imaging range YR, for example, the upper long side.

In this state, when electric power is supplied from a camera circuit (not shown) to the

coils

521b and 522b of the shutter unit 250, a current flows through the

coils

521b and 522b to generate a magnetic field. The

magnets

521a and 522a of the OIS frame 400400 are driven by this magnetic field, and the OIS frame 400400 moves in a plane perpendicular to the optical axis AX by this driving force. Specifically, the OIS frame 400 moves in the short side direction by the first actuator 521, and moves in the long side direction by the second actuator 522.

4). Engagement of Frames FIGS. 5 to 7 are sectional views of the lens barrel 20. However, FIG. 5 thru | or: FIG. 7 is the schematic diagram with which the several cut surface which passes along the optical axis AX was combined. 5 illustrates the retracted lens barrel 20, FIG. 6 illustrates the wide lens barrel 20, and FIG. 7 illustrates the telephoto lens barrel 20.
As shown in FIG. 5, in the retracted state, the second rotary frame 220, the second decorative frame 320, the first decorative frame 310, the first rectilinear frame 110, the first rotary frame 210, the first rotary frame 210, The second rectilinear frame 120 and the third rectilinear frame 130 are sequentially stored. Further, in the retracted state, the lens barrel 20 in the optical axis direction is made compact by retracting the third lens unit L3 to the outside in the radial direction of the fourth and fifth lens units L4 and L5.

Hereinafter, the engagement between the frames will be described with reference to FIGS. 6 and 7.
The gear part 221 of the second rotary frame 220 is engaged with the zoom gear 102 (not shown). The cam protrusion B1 of the second rotating frame 220 is engaged with the cam groove b1 of the fixed frame 100. Thereby, the second rotating frame 220 moves in the optical axis direction while rotating in the circumferential direction by the driving force of the zoom motor 101.

The rectilinear protrusion A1 of the second rectilinear frame 120 is engaged with the rectilinear groove a1 of the fixed frame 100. The bayonet protrusion E1 of the second rectilinear frame 120 is engaged with the bayonet groove e1 of the second rotating frame 220. Therefore, the second rectilinear frame 120 moves straight in the optical axis direction together with the second rotating frame 220.
The rectilinear protrusion A4 of the first rotating frame 210 is engaged with the rectilinear groove a4 of the second rotating frame 210. The cam protrusion B3 of the first rotation frame 210 is engaged with the cam groove b3 of the second rectilinear frame 120. Accordingly, the first rotating frame 210 moves in the optical axis direction together with the second rectilinear frame 120 while rotating in the circumferential direction together with the second rotating frame 210.

The cam protrusion B2 of the first rectilinear frame 110 is engaged with the cam groove b2 of the first rotating frame 210. The rectilinear protrusion A2 of the third rectilinear frame 130 is engaged with the rectilinear groove a2 of the first rectilinear frame 110. Accordingly, the first rectilinear frame 110 moves straight in the optical axis direction in accordance with the rotation of the first rotating frame 210.
The bayonet protrusion E2 of the third rectilinear frame 130 is engaged with the bayonet groove e2 of the second rotating frame 220. The rectilinear protrusion A2 of the third rectilinear frame 130 is engaged with the rectilinear groove a2 of the first rectilinear frame 110. Accordingly, the third rectilinear frame 130 moves straight along with the second rotating frame 210 in the optical axis direction.

As described above, the first rotating frame 210 is engaged with the first rectilinear frame 110 via the cam mechanism, and causes the first rectilinear frame 110 to move straight by rotating. The second rectilinear frame 120 is engaged with the first rotating frame 210 via a cam mechanism, and rotates the first rotating frame 210 by moving straight in the optical axis direction. Therefore, by rotating the second rotation frame 220 with the zoom motor 101, the first rotation frame 210 is rotated to rotate the first rectilinear frame 110, while the second rectilinear frame 120 is moved straight to make the first rotation. The frame 210 can be moved. As a result, the first to third movable lens barrel portions 21 to 23 are smoothly drawn out from the fixed lens barrel portion 24.

5. Operation of OIS Unit Finally, the operation of the OIS unit will be described based on the configuration of the lens barrel 20 described above.
First, as shown in FIG. 15A, in the photographing enabled state, the third lens contact portion 603 </ b> C of the retractable lens frame 401 contacts the anti-rotation portion 502, so that the retractable lens frame 401 is in contact with the OIS frame 400. Positioning is performed in one posture (capturing posture).
Next, when the lens barrel 20 starts to change from the photographing enabled state to the retracted state, the shutter unit 250 approaches the master flange 105 as shown in FIG. Then, the engaging portion 504 of the OIS frame 400 attached to the shutter unit 250 comes into contact with the distal end portion of the protruding portion 108 provided on the master flange 105. Then, the OIS frame 400 is pressed by the tip of the protrusion 108. When the engaging portion 504 of the OIS frame 400 comes into contact with the inner peripheral portion (the portion on the proximal end side from the distal end portion) of the protruding portion 108, the OIS frame 400 becomes immovable with respect to the shutter unit. Become.

On the other hand, in a state where the OIS frame 400 is pressed by the protruding portion 108 of the master flange 105, the pressing portion 605 of the retractable lens frame 401 is pressed and guided by the first retracting cam 125 provided on the master flange. The
Specifically, in a state where the OIS frame 400 is pressed by the tip of the protruding portion 108, the pressing portion 605 of the retractable lens frame 401 is the first guide portion 125a of the first retracting cam 125 (see FIG. 7). The retractable lens frame 401 starts to retract from the first posture to the second posture (retracted posture) by being brought into contact with and guided by.

Subsequently, in a state where the OIS frame 400 is pressed by the inner peripheral portion (including the central portion) excluding the distal end portion, the pressing portion 605 of the retractable lens frame 401 is The retractable lens frame 401 is further retracted by being brought into contact with and guided by the second guide portion 125b (see FIG. 7) of the retractable cam 125. Subsequently, the pressing portion 605 of the retractable lens frame 401 comes into contact with the holding portion 125c (see FIG. 7) of the first retracting cam 125.

Finally, when the shutter unit 250 further approaches the master flange 105, the positioning portion 609 provided on the retractable lens frame 401 comes into contact with the second retracting cam 126. Thereby, the retractable lens frame 401 is positioned at the retracted position.
In this way, the movement of the OIS frame 400 relative to the shutter unit 250 is restricted, and the retractable lens frame 401 is positioned with respect to the OIS frame 400 in the second posture (retracted posture). At this time, the lens holding portion 602 of the retractable lens frame 401 is accommodated in the accommodating portion 550 of the OIS frame 400.
As described above, in the present lens barrel 20, when the lens barrel 20 changes from the shootable state to the retracted state, the movement restriction of the OIS frame 400 and the positioning of the retractable lens frame 401 are executed simultaneously. ing.

6). Action and Effect (1-1) The lens barrel 20 includes an OIS frame 400 and a retractable lens frame 401. The retractable lens frame 401 has a third lens unit L3. The retraction lens frame 401 moves around a retraction axis 501b substantially parallel to the optical axis with respect to the OIS frame 400 during the transition period between the photographing enabled state and the storage state. The rotating spring 403 is held by the OIS frame 400 and biases the retractable lens frame 401 around the retracting shaft 501b. One of the OIS frame 400 and the retractable lens frame 401 has a retracting shaft 501b. The other of the OIS frame 400 and the retractable lens frame 401 has a shaft holding portion 601 that engages with the retractable shaft 501b. The shaft holding portion 601 has at least two abutting surfaces 601a that abut against the retracting shaft 501b. At least two contact surfaces 601a are urged toward the retracting shaft 501b by the rotating spring 403.

In the present lens barrel 20, the shaft holding portion 601 has two contact surfaces 601a that contact the retracting shaft 501b. The two contact surfaces 601a are urged toward the retracting shaft 501b by the rotating spring 403. Thus, the urging force can be reliably transmitted from the shaft holding portion 601 to the retracting shaft 501b via the two contact surfaces 601a formed on the shaft holding portion 601. Further, since the retracting shaft 501b is disposed between the two contact surfaces 601a, the backlash of the retracting shaft 501b with respect to the shaft holding portion 601 can be reliably suppressed.

(1-2) In the present lens barrel 20, movement of the retractable lens frame 401 in the optical axis direction is restricted by contacting the OIS frame 400 at at least three positions different from the retractable shaft 501b. The OIS frame 400 has a rotation stopper 502 that restricts the movement of the retractable lens frame 401 by the rotation spring 403.
In the present lens barrel 20, the retractable lens frame 401 is positioned at three points in the optical axis direction with respect to the OIS frame 400 via the contact portions 603 (603A to 603B). Further, in the direction orthogonal to the optical axis, the retractable lens frame 401 is positioned on the rotation preventing portion 502 via the contact portion 603 (603C). Thereby, the retractable lens frame 401 can be reliably positioned with respect to the OIS frame 400 with respect to the optical axis direction and the direction orthogonal to the optical axis.

(1-3) In the lens barrel 20, at least two contact surfaces 601a are in contact with the retracting shaft 501b on the base end side of the retracting shaft 501b.
In the present lens barrel 20, the retracting shaft 501b is in contact with the contact surface 601a on the base end side. Thereby, even if the retracting shaft 501b is bent, the necessary eccentricity accuracy can be ensured. In addition, since the sufficient accuracy can be ensured even if the retracting shaft 501b is shortened, the lens barrel can be thinned.

(1-4) In the present lens barrel 20, the shaft holding portion 601 is formed in a cylindrical shape, and at least two contact surfaces 601 a are formed on the inner peripheral surface of the shaft holding portion 601. At least two contact surfaces 601a formed on the inner peripheral surface of the shaft holding portion 601 are in contact with the outer peripheral surface of the retracting shaft 501b.
In the present lens barrel 20, at least two contact surfaces 601a formed on the inner peripheral surface of the shaft holding portion 601 are in contact with the outer peripheral surface of the retracting shaft 501b. Can be reliably suppressed.

(1-5) The present lens barrel 20 is formed on the inner peripheral surface of the shaft holding portion 601 so that the angle formed by at least two contact surfaces 601a is a predetermined angle.
In the present lens barrel 20, when the shaft holding portion 601 (hole portion) is viewed in the depth direction, the angle formed by the two contact surfaces 601a is a predetermined angle, for example, an acute angle. It is formed on the inner peripheral surface. Thus, by arranging the two contact surfaces 601a in a V shape, the backlash of the retracting shaft 501b with respect to the shaft holding portion 601 can be reliably suppressed.

(1-6) In the present lens barrel 20, there is a portion where the rotating spring 403 contacts the retractable lens frame 401 in order to increase the force for urging at least two contact surfaces 601a toward the retractable shaft 501b. It is formed by bending.
In the lens barrel 20, the force that urges at least the two contact surfaces 601a toward the retracting shaft 501b can be increased by bending the portion where the rotating spring 403 contacts the retracting lens frame 401. Thereby, the play of the retracting shaft 501b with respect to the shaft holding portion 601 can be more reliably suppressed.

(2-1) In the prior art, the sub optical system holder (corresponding to the retractable lens frame) that holds the sub optical system can be retracted with respect to the holding member that holds the main optical system. In the lens barrel having such a configuration, when an impact force such as dropping is input to the lens barrel, the input may cause the sub optical system holder to be detached from the holding member.
The technology disclosed herein has been made in view of the above problems, and an object of the present invention is to enable the retractable lens frame to operate stably.

The lens barrel disclosed herein includes a holding frame and a retractable lens frame. The retractable lens frame is held by the holding frame and moves around the retracting axis that is substantially parallel to the optical axis during the transition period between the photographing enabled state and the retracted state. The holding frame has a main body portion and a restriction portion. The restricting portion is provided at a predetermined interval from the main body portion. The retractable lens frame has an engaging portion that engages with the restricting portion. By disposing the engaging part between the main body part and the restricting part, the movement of the retractable lens frame in the optical axis direction is restricted.

According to the technology disclosed herein, a lens barrel in which the retractable lens frame can stably operate can be provided.
Hereinafter, the above-described configuration and effect will be described in detail.
The lens barrel 20 includes an OIS frame 400 and a retractable lens frame 401. The retractable lens frame 401 is held by the OIS frame 400 and moves around a retracting axis that is substantially parallel to the optical axis during the transition period between the photographing enabled state and the retracted state. The OIS frame 400 includes a second main body portion 500 and a detachment preventing portion 530 provided at a predetermined interval from the second main body portion 500. The retractable lens frame 401 has an engaging portion 606 that engages with the separation preventing portion 530. By disposing the engaging portion 606 between the second main body portion 500 and the separation preventing portion 530, the movement of the retractable lens frame 401 in the optical axis direction is restricted.

In the present lens barrel 20, the engaging portion 606 of the retractable lens frame 401 is disposed between the second main body portion 500 of the OIS frame 400 and the separation preventing portion 530 of the OIS frame 400. For this reason, even if an impact force such as dropping is input to the lens barrel, the movement of the retractable lens frame 401 in the optical axis direction is restricted by the separation preventing unit 530 of the OIS frame 400. That is, the retractable lens frame 401 can be reliably held with respect to the OSI frame 400. Further, the generation of stress in the direction in which the thrust spring 402 spreads can be prevented. Thereby, the retractable lens frame 401 can be operated stably.

(2-2) In the lens barrel 20, the engaging portion 606 is formed with a notch 606 c. By introducing the separation preventing part 530 into the cutout part 606 c, the engaging part 606 is disposed between the separation preventing part 530 and the second main body part 500.
In the lens barrel 20, the first engagement portion 606 a is disposed between the separation prevention portion 530 and the third main body portion 600 by introducing the separation prevention portion 530 into the cutout portion 606 c of the engagement portion 606. can do. Thus, the detachment of the retractable lens frame 401 can be reliably prevented only by mounting the retractable lens frame 401 on the OIS frame 400 without using any special member or component.

(2-3) In the present lens barrel 20, the movement of the retractable lens frame 401 in the optical axis direction is restricted by engaging the engaging portion 606 with the separation preventing portion 530 in the photographing enabled state and the retracted state. Is done. Thereby, the detachment of the retractable lens frame 401 can be reliably prevented in the photographing enabled state and the stored state.

(3) Conventionally, there has been disclosed a lens barrel in which the blur correction lens group chamber can be retracted to the outside of the fourth lens group chamber in a direction orthogonal to the optical axis (see Japanese Patent Application Laid-Open No. 2007-163961). ).
In the prior art, in the retracted state, the blur correction lens group chamber (corresponding to the retractable lens frame) can be retracted to the outside of the fourth lens group chamber. In the photographing state, the shake correction lens group chamber is shifted and displaced in a direction orthogonal to the optical axis by a voice coil motor (corresponding to an actuator). Thereby, image blur is reduced.
In this prior art, voice coil motors of the same size are provided on the lower side and the side with respect to the optical axis. However, in general, gravity works in the vertical direction, so that the force when moving the shake correction lens group in the vertical direction is larger than when moving the shake correction lens group in the horizontal direction. Is required. For this reason, when voice coil motors of the same size are used, the blur correction in the vertical direction of the blur correction lens group chamber may become unstable.

The technology disclosed herein has been made in view of the above-described problems, and an object of the present invention is to enable stable shake correction.
The lens barrel disclosed herein has a substantially rectangular effective imaging range. The lens barrel includes a frame, a holding frame, a retractable lens frame, a first actuator, and a second actuator. The holding frame is held by the front frame and is movable in a plane perpendicular to the optical axis with respect to the frame. The retractable lens frame is held by the holding frame and moves to a position shifted from the optical axis during the transition period between the photographing enabled state and the stored state. The first actuator moves the holding frame in the first direction. The second actuator is larger than the first actuator and moves the holding frame in the second direction. In this case, the retractable lens frame moves to one long side in the effective imaging range. The second actuator is disposed on the other long side in the effective imaging range.
According to the technology disclosed herein, it is possible to provide a lens barrel that can stably perform blur correction.
The lens barrel disclosed herein can be described as follows.

(3-1) A lens barrel having a substantially rectangular effective imaging range,
A frame,
A holding frame that is held by the front frame and is movable in a plane perpendicular to the optical axis with respect to the frame;
A retractable lens frame that is held by the holding frame and moves to a position deviated from the optical axis in a transition period between the photographing enabled state and the stored state;
A first actuator for moving the holding frame in a first direction;
Moving the holding frame in the second direction, a second actuator larger than the first actuator;
With
The retractable lens frame moves to one long side in the effective imaging range,
The second actuator is disposed on the other long side in the effective imaging range,
Lens barrel.
The lens barrel disclosed herein can also be described as follows.

(3-2) The second direction is a short side direction in the effective imaging range.
The lens barrel according to (3-1).
The lens barrel disclosed herein can also be described as follows.
(3-3) The first actuator is disposed on one short side in the effective imaging range.
The lens barrel according to (3-1) or (3-2).

Hereinafter, the above-described configuration and effect will be described in detail.
The lens barrel 20 is a lens barrel having a substantially rectangular effective imaging range YR. The lens barrel 20 includes a shutter unit 250, an OIS frame 400, a retractable lens frame 401, a first actuator, and a second actuator. The OIS frame 400 is held by the shutter unit 250 and can move in a plane perpendicular to the optical axis with respect to the shutter unit 250. The retractable lens frame 401 is held by the OIS frame 400 and moves to a position shifted from the optical axis during the transition period between the photographing enabled state and the housed state. The first actuator moves the OIS frame 400 in the first direction. The second actuator moves the OIS frame 400 in the second direction. The second actuator is larger than the first actuator. The retractable lens frame 401 moves to one long side in the effective imaging range YR. The second actuator is disposed on the other long side in the effective imaging range YR.

In the present lens barrel 20, the retractable lens frame 401 is retracted in the vertical direction (one long side in the horizontally long effective imaging range YR), so that the retractable lens frame 401 exists in the space where the retractable lens frame 401 existed before retracting. Each lens frame (ex. Fourth lens group frame F4 and fifth lens group frame F5) can be inserted. Thus, the lens barrel 20 can be downsized by effectively utilizing the space.

Further, in the present lens barrel 20, since the second actuator is larger than the first actuator, even if the retractable lens frame 401 is disposed on the OIS frame 400 and the OIS frame 400 becomes heavy, the OIS frame 400 is It can be driven reliably. In other words, the blur correction can be stably performed.
Further, in the present lens barrel 20, since the second actuator is arranged on the other long side of the effective imaging range (opposite side of the retractable lens frame 401), even if the second actuator becomes large, the lens The lens barrel can be reduced in size.

(3-4) In the lens barrel 20, the second direction is the short side direction in the effective imaging range YR.
In the present lens barrel 20, the OIS frame can be moved in the short side direction (second direction, vertical direction) by the second actuator larger than the first actuator, so that the OIS frame operates stably in the short side direction. Can be made.

(3-5) In the present lens barrel 20, the first actuator is disposed on one short side in the effective imaging range YR.
In the present lens barrel 20, the first actuator 521 is disposed on one short side in the effective imaging range YR, so that the lens barrel 20 can be reduced in size.

(Other embodiments)
(A) In the above-described embodiment, the lens barrel 20 includes the third rectilinear frame 130, but may not include the third rectilinear frame 130.
(B) In the above embodiment, the second rectilinear frame 120 is arranged inside the first rotating frame 210, but the present invention is not limited to this. The second rectilinear frame 120 may be disposed outside the first rotating frame 210. That is, the second rectilinear frame 120 only needs to be disposed inside the first rectilinear frame 110.
(C) In the above embodiment, the lens barrel 20 includes the first to fifth lens groups L1 to L5. However, the present invention is not limited to this. The lens barrel 20 only needs to include at least the first lens unit L1.

(D) In the above embodiment, the lens barrel 20 is provided with a three-stage retractable zoom mechanism, but is not limited thereto. The lens barrel 20 may have a retracting mechanism of three or more stages.
(E) In the above embodiment, the cam groove b is formed in one of the two frames and the cam protrusion B is formed in the other frame, but the present invention is not limited to this. The cam projection B may be formed on one of the two frames, and the cam groove b may be formed on the other frame. Moreover, the cam groove b and the cam protrusion B may be formed in each of the two frames.

(F) In the above embodiment, the rectilinear groove a is formed in one of the two frames and the rectilinear projection A is formed in the other frame, but the present invention is not limited to this. The rectilinear protrusion A may be formed on one of the two frames, and the rectilinear groove a may be formed on the other frame. Moreover, the rectilinear advance groove | channel a and the rectilinear advance protrusion A may be formed in each of two frames.
(G) In the above embodiment, the bayonet groove e is formed in one of the two frames and the bayonet protrusion E is formed in the other frame, but this is not restrictive. The bayonet protrusion E may be formed in one of the two frames, and the bayonet groove e may be formed in the other frame. Moreover, the bayonet groove | channel e and the bayonet protrusion E may be formed in each of two frames.

(H) In the above embodiment, the third lens unit L3 is retracted to the outside in the radial direction of the fourth and fifth lens units L4 and L5. However, the present invention is not limited to this. The third lens unit L3 may be disposed in front of the fourth and fifth lens units L4 and L5 in the retracted state.
(I) In the above embodiment, an example in which the retracting shaft portion 501 (retracting shaft 501b) is provided in the OIS frame 400 and the shaft holding portion 601 is provided in the retracting lens frame 401 has been described. The retracting shaft portion 501 (the retracting shaft 501b) may be provided in the retracting lens frame 401 by providing the OIS frame 400.

(J) In the above embodiment, as shown in FIG. 12, the rotation stopper 502 of the OIS frame 400 is formed in a concave shape, and the third contact of the retractable lens frame 401 on the inclined surface 502 a of the rotation stopper 502. An example in which the portion 603C abuts is shown. Alternatively, as shown in FIG. 23, the third contact portion 603C of the retractable lens frame 401 may be in contact with the two side surfaces 512a of the recess 512 of the rotation stop portion 502 '. In this case, the two side walls 512a of the recess 512 are opposed to each other and inclined. More specifically, the two side walls 512 a of the recess 512 are formed so as to approach each other toward the bottom 512 b of the recess 512. Thereby, the retractable lens frame 401 can be more reliably positioned with respect to the OIS frame 400.

The technology disclosed here can be widely applied to lens barrels.

DESCRIPTION OF SYMBOLS 1 ... Digital camera 10 ... Case 20 ... Lens barrel 21 ... 1st moving barrel part 22 ... 2nd moving barrel part 23 ... 3rd moving barrel part 24 ... Fixed barrel part 100 ... Fixed frame 110 ... 1st 1 rectilinear frame 101 ... zoom motor 102 ... zoom gear 120 ... 2nd rectilinear frame 130 ... 3rd rectilinear frame 210 ... 1st rotating frame 211 ... gear part 220 ... 2nd rotating frame 310 ... 1st decorative frame 320 ... 2nd decorative frame F2 to F5 ... 2nd to 5th lens group frames L1 to L5 ... 1st to 5th lens group a ... Straight advance groove A ... Straight advance protrusion b ... Cam groove B ... Cam follower c ... Through groove e ... Bayonet groove E ... Bayonet protrusion

Claims

A holding frame;
A retractable lens frame having a lens and moving around a retracting axis substantially parallel to the optical axis with respect to the holding frame in a transition period between a photographing enabled state and a retracted state;
A biasing member that is held by the holding frame and biases the retractable lens frame around the retracting shaft;
With
Either one of the holding frame and the retracting lens frame has the retracting shaft,
One of the holding frame and the retractable lens frame has a bearing portion that engages with the retracting shaft,
The bearing portion has at least two abutting surfaces that abut against the retracting shaft,
The at least two contact surfaces are biased toward the retracting shaft by the biasing member.
Lens barrel.
The retractable lens frame is restricted from moving in the optical axis direction by contacting the holding frame at at least three positions different from the retractable axis,
The holding frame has a detent portion that restricts movement of the retractable lens frame by the biasing member,
The lens barrel according to claim 1.
The at least two contact surfaces are in contact with the retracting shaft on the proximal end side of the retracting shaft;
The lens barrel according to claim 1 or 2.
The bearing portion is formed in a cylindrical shape, and the at least two contact surfaces are formed on an inner peripheral surface of the bearing portion,
The at least two contact surfaces formed on the inner peripheral surface of the bearing portion are in contact with the outer peripheral surface of the retracting shaft;
The lens barrel according to any one of claims 1 to 3.
The angle formed by the at least two contact surfaces is a predetermined angle, and is formed on the inner peripheral surface of the bearing portion.
The lens barrel according to claim 4.
In order to increase the force for urging the at least two abutment surfaces toward the retraction shaft, a portion where the urging member abuts on the retraction lens frame is formed by bending.
The lens barrel according to any one of claims 1 to 5.
The holding frame includes a main body part, and a regulation part provided at a predetermined interval from the main body part,
The retractable lens frame has an engaging portion that engages with the restricting portion, and the engaging portion is disposed between the main body portion and the restricting portion, thereby moving the retractable lens frame in the optical axis direction of the retractable lens frame. Movement is restricted,
The lens barrel according to claim 1.
The engaging portion is formed with a notch,
By introducing the restricting portion into the cutout portion, the engaging portion is disposed between the restricting portion and the main body portion.
The lens barrel according to claim 7.
In the photographing enabled state and the retracted state, the movement of the retractable lens frame in the optical axis direction is restricted by engaging the engaging part with the restricting part.
The lens barrel according to claim 7 or 8.
A holding frame for holding a retractable lens frame having a retractable lens;
A retracting mechanism for moving the retractable lens frame so as to move the retractable lens between a photographing position and a retracted position;
A biasing member that biases the retractable lens frame in a direction substantially perpendicular to the optical axis of the retractable lens;
With
The retracting lens frame and the holding frame are engaged by a retracting shaft and a bearing portion, and the retracting lens frame is moved around the retracting shaft,
The bearing portion has two contact surfaces that can contact the retracting shaft,
When the retracting lens frame is urged by the urging member, the bearing portion contacts the two abutting surfaces when the evacuating lens frame is urged.
Lens barrel.