JPWO2013102993A1 - Lens barrel - Google Patents

Abstract

The lens barrel (20) includes a cylindrical fixed frame (100), a cylindrical first guide frame (110), a cylindrical first rotating frame (210), and a cylindrical second guide frame ( 120). The fixed frame (100) has a guide groove (a1) and a cam groove (b1) on the inner peripheral surface (100S). The first guide frame (110) has a guide protrusion (A1) engaged with the guide groove (a1) on the outer peripheral surface (110T) and a guide groove (a2) on the inner peripheral surface (110S). The first rotating frame (210) includes a cam follower (B1) engaged with the cam groove (b1) on the outer peripheral surface (210T) and a through groove (k1) penetrating from the inner peripheral surface (210S) to the outer peripheral surface (210T). And have. The second guide frame (120) has a cam follower (AB2) engaged with the guide groove (a2) through the through groove (k1) on the outer peripheral surface (120T).

Description

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

As conventional lens barrels, there are technologies described in Patent Documents 1 and 2.
Patent Document 1 discloses a lens barrel that can be extended in two stages. Patent Document 2 discloses a lens barrel that can be extended in three stages.

JP 2011-48346 A JP 2011-13613 A

(Problems to be solved by the invention)
In the present disclosure, there is provided a lens barrel capable of further shortening the total length in the optical axis direction in the retracted state in a retractable lens barrel.
(Means for solving the problem)
In the lens barrel disclosed here, a second frame having a cylindrical shape and having a second guide groove on the inner peripheral surface, and arranged on the radially inner side of the second frame, the second cam on the inner peripheral surface is provided. A third frame having a groove; and a moving frame having a second cam follower that is disposed radially inward of the third frame and is engaged with the second cam groove. The third frame is formed with a through hole penetrating from the radially inner side to the outer side. The moving frame has a second guide protrusion that is engaged with the second guide groove while being inserted into the through hole. The moving frame moves in the cylindrical axis direction in a state in which the rotation of the third frame rotates relative to the two frames while the rotation of the third frame is restricted.

  The lens barrel is disposed on the inner side in the radial direction of the first frame, the first frame having a first guide groove on the inner peripheral surface, and the first cam groove on the inner peripheral surface. A first guide protrusion that engages with one guide groove, a second frame having a second guide groove on the inner peripheral surface, and a radially inner side of the second frame and engages with the first cam groove A first cam follower, a third frame having a second cam groove on the inner peripheral surface, and a second cam follower disposed radially inside the third frame and engaged with the second cam groove. A fourth frame. The third frame is formed with a through hole penetrating from the radially inner side to the outer side. The fourth frame has a second guide protrusion that is engaged with the second guide groove while being inserted into the through hole. The fourth frame moves in the direction of the cylindrical axis in a state in which the rotation of the third frame relative to the one frame is restricted with respect to the first frame.

  Furthermore, the third frame has a third guide groove on an inner peripheral surface, and the moving frame is a fourth lens frame disposed on the radially inner side of the third frame. A fifth frame having a third guide projection that is arranged radially inside the frame and engaged with the third guide groove; and a cylindrical axis direction of the fifth frame arranged radially inside the fourth frame And a sixth frame having a first movement restriction mechanism for restricting movement of the first frame. The fourth frame has a first rotation restricting mechanism for restricting the rotation of the sixth frame in the cylindrical axis direction. When the third frame rotates relative to the second frame, the fifth frame rotates relative to the fourth frame and the sixth frame, and the fourth frame and the It moves in the cylindrical axis direction with 6 frames.

In addition, in the lens barrel that is the fourth frame disposed radially inward of the third frame, the moving frame is engaged with the fourth frame radially inward of the fourth frame. An engagement frame having a mechanism; and a seventh frame that is disposed between the fourth frame and the engagement frame in the radial direction and that moves forward and backward with respect to the fourth frame and the engagement frame. And the said engagement mechanism overlaps with a part of said 2nd cam follower or the said 2nd guide protrusion seeing from the said radial direction.
(Effect of the invention)
According to the technique disclosed here, in the retractable lens barrel, the total length in the optical axis direction in the retracted state can be further shortened.

Perspective view of digital camera Perspective view of lens barrel Disassembled perspective view of lens barrel Perspective view of fixed frame Perspective view of first guide frame Perspective view of first rotating frame Perspective view of the second guide frame Perspective view of second rotating frame Perspective view of the third guide frame Schematic diagram in which the second guide frame, the second rotating frame, and the third guide frame are assembled. Perspective view of first lens group frame Perspective view of second lens group frame Perspective view of shutter 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)

  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 an imaging device. In the following explanation, the subject side is “front”, the opposite side of the subject is “rear”, the upper side is “up”, the lower side is “down”, and the subject is facing the subject. 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.

<Configuration of digital camera 1>
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. FIG. 2 is a perspective view of the lens barrel 20.
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 FIG. 2, 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 portion 24. ,have.
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. When the lens barrel 20 is extended, the third movable lens barrel portion 23 is located in the foremost position among the first to third movable lens barrel portions 21 to 23.

<Detailed configuration of lens barrel 20>
Next, the detailed configuration of the lens barrel 20 will be described with reference to the drawings. FIG. 3 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 drawn out from the fixed barrel portion 24 along the optical axis AX of the optical system. The optical system includes first to fourth lens groups L1 to L4. 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.

1. First moving lens barrel 21
The first movable lens barrel unit 21 includes a first guide frame 110, a first rotating frame 210, and a first decorative frame 301. The 1st guide frame 110 is a cylindrical resin member arrange | positioned at the radial inside of the fixed frame 100 mentioned later. The first rotating frame 210 is a cylindrical resin member disposed on the radially inner side of the first guide frame 110. The first decorative frame 301 is a cylindrical sheet metal member that covers the outer periphery of the first guide frame 110.

2. Second moving lens barrel 22
The second movable lens barrel 22 includes a second guide frame 120, a second rotating frame 220, a third guide frame 130, a second lens group frame 320, a second lens group L2, a third lens group frame 330, and a third lens. It has a group L3, a shutter frame 335, and a second decorative frame 302.
The second guide frame 120 is a cylindrical resin member disposed on the radially inner side of the first rotating frame 210. The second rotating frame 220 is a cylindrical resin member disposed on the radially inner side of the second guide frame 120. The third guide frame 130 is a cylindrical resin member disposed on the radially inner side of the second rotating frame 220. The second lens group frame 320 is disposed radially inward of the third guide frame 130 and supports the second lens group L2 for zooming. The third lens group frame 330 is housed in the shutter frame 335 and supports the third lens group L3 for image blur correction. The third lens group frame 330 is supported by a shutter frame 335 so as to be swingable in the radial direction, and constitutes an image blur correction mechanism together with the third lens group L3. The shutter frame 335 is disposed on the radially inner side of the third guide frame 130 and incorporates a shutter mechanism. The shutter frame 335 supports the third lens group frame 330 so as to be swingable in the radial direction. A flexible control wire 335 a is connected to the shutter frame 335. The control flexible wiring 335a is disposed along the inner peripheral surface of the fixed frame 100, and is connected to a control device (not shown). The control flexible wiring 335a transmits a control signal to a shutter mechanism and an image blur correction mechanism described later. The second decorative frame 302 is a cylindrical sheet metal member that covers the outer periphery of the second guide frame 120.

3. Third moving lens barrel 23
The third movable lens barrel unit 23 includes a first lens group frame 310, a first lens group L 1, and a third decorative frame 303.
The first lens group frame 310 is disposed between the second guide frame 120 and the second rotation frame 220. The first lens group frame 310 supports the first lens group L <b> 1 for taking light into the lens barrel 20. The third decorative frame 303 is a cylindrical sheet metal member that covers the outer periphery of the first lens group frame 310.

4). Fixed barrel 24
The fixed barrel portion 24 includes a fixed frame 100, a fourth lens group frame 340, a fourth lens group L4, a zoom motor 241, a zoom gear 242, a focus motor 243, a master flange 244, an image sensor 245, and an image sensor flexible wiring 245a. .
The fixed frame 100 is a cylindrical resin member disposed on the radially outer side of the first guide frame 110 and the first rotating frame 210. The fourth lens group frame 340 is attached to the master flange 244 and is driven in the optical axis direction by the focus motor 243. The fourth lens group frame 340 supports the fourth lens group L4 for focus adjustment.

  The zoom motor 241 is a drive source for extending the first to third movable lens barrel portions 21 to 23 and is attached to the side surface of the fixed frame 100. The zoom gear 242 transmits the driving force of the zoom motor 241 to the first rotation frame 210. The front end of the zoom gear 242 is supported by the fixed frame 100, and the rear end of the zoom gear 242 is supported by the master flange 244. The focus motor 243 is a drive source for driving the fourth lens group frame 340 in the optical axis direction, and is attached to the master flange 244. The master flange 244 is a plate-like resin member that covers the rear of the fixed frame 100. The image sensor 245 is fitted in the center of the master flange 244. The imaging element flexible wiring 245a is attached to the rear surface of the master flange 244. The imaging element flexible wiring 245a is connected to a control device (not shown) and transmits a signal from the imaging element 245.

<Configuration of each frame>
Below, the frame which comprises the lens-barrel 20 is demonstrated, referring drawings. Specifically, the fixed frame 100, the first guide frame 110, the first rotation frame 210, the second guide frame 120, the second rotation frame 220, the third guide frame 130, the first lens group frame 310, the second lens group. After sequentially describing the configuration of the frame 320, the third lens group frame 330, and the shutter frame 335, the engagement state between the frames will be described.

1. Configuration of Fixed Frame 100 FIG. 4 is a perspective view of the fixed frame 100.
The fixed frame 100 includes a fixed frame main body 101 and a zoom gear support portion 102.
The fixed frame main body 101 is formed in a cylindrical shape, and has an inner peripheral surface 100S and an outer peripheral surface 100T.
The front support portion 102 is provided so as to protrude from the outer peripheral surface 100T. The front support unit 102 rotatably supports the front end of the zoom gear 242. In the present embodiment, the front support portion 102 is covered with the front plate 11 and thus is not exposed to the outside of the housing 10 (see FIG. 1). Note that the tooth portion of the zoom gear 242 protrudes inside the fixed frame main body 101.

Further, the fixed frame 100 has five guide grooves a1 and three cam grooves b1. However, in FIG. 4, three guide grooves a1 and two cam grooves b1 are shown.
The five guide grooves a1 are formed on the inner peripheral surface 100S along the optical axis direction, and are arranged at appropriate intervals in the circumferential direction.
The three cam grooves b1 are formed on the inner peripheral surface 100S so as to intersect the optical axis direction.

2. Configuration of First Guide Frame 110 FIG. 5 is a perspective view of the first guide frame 110.
The first guide frame 110 includes a first guide frame main body 111, five guide protrusions A1, three guide grooves a2, an engagement groove e1, and an engagement protrusion E0.
The guide frame main body 111 is formed in a cylindrical shape and has an inner peripheral surface 110S and an outer peripheral surface 110T.

The five guide protrusions A1 are erected on the rear end portion of the outer peripheral surface 110T. The five guide protrusions A1 are engaged with the five guide grooves a1 of the fixed frame 100.
The three guide grooves a2 are formed on the inner peripheral surface 110S along the optical axis direction.
The engagement groove e1 is formed in an arc shape along the circumferential direction at the rear end portion of the inner peripheral surface 110S. The engagement groove e1 intersects with the three guide grooves a2.

  The engagement protrusion E0 is disposed at the front end portion of the inner peripheral surface 110S. The engagement protrusion E0 is formed in an arc shape along the circumferential direction. In the present embodiment, the engagement protrusion E0 is divided into a plurality of pieces in the circumferential direction.

3. Configuration of First Rotating Frame 210 FIG. 6 is a perspective view of the first rotating frame 210.
The first rotating frame 210 includes a first rotating frame main body 211 and a gear portion 212.
The first rotating frame body 211 is formed in a cylindrical shape and has an inner peripheral surface 210S and an outer peripheral surface 210T.
The gear portion 212 is erected at the rear end portion of the outer peripheral surface 210T, and is formed along the circumferential direction. When the gear unit 212 is engaged with the zoom gear 242, the first rotating frame 210 is rotated in the circumferential direction by the driving force of the zoom motor 241. Although not shown, the gear portion 212 is located behind the guide protrusion A1 of the first guide frame 110.

The first rotating frame 210 includes three cam followers B1, three engagement protrusions E1, three through grooves k1, engagement grooves e0, and three guide grooves a3.
The through groove k1 further includes a cam groove b2 and a through hole k11.
However, in FIG. 6, only one guide groove a3 is shown.
The three cam followers B1 are erected at the rear end portion of the outer peripheral surface 210T. Two of the three cam followers B <b> 1 are disposed at both ends of the gear portion 212. The three cam followers B1 are engaged with the three cam grooves b1 of the fixed frame 100.

The engagement protrusion E1 is formed along the circumferential direction at the rear end portion of the outer peripheral surface 210T. The engagement protrusion E1 is disposed in front of the gear portion 212. The engagement protrusion E <b> 1 is engaged with the engagement groove e <b> 1 of the first guide frame 110. In the present embodiment, the engagement protrusion E1 and the engagement groove e1 constitute an engagement mechanism for rotatably engaging the first rotation frame 210 with the first guide frame 110.
The three through grooves k1 are arranged adjacent to the outer diameter side of the cam groove b2 through the through hole k11 penetrating from the cam bottom surface of the cam groove b2 to the outer peripheral surface 210T, so that the outer peripheral surface 210T from the inner peripheral surface 210S. The first rotation frame main body 211 is passed through.

The engagement groove e0 is formed at the front end portion of the outer peripheral surface 210T. The engagement groove e0 is formed in an arc shape along the circumferential direction. The engagement groove e0 intersects with the three through grooves k1. The engagement protrusion E0 is engaged with the engagement groove e0.
The three guide grooves a3 are formed along the optical axis direction on the inner peripheral surface 210S. Two of the three guide grooves a3 are close to each other, and the other one is formed 120 to 180 degrees apart.

4). Configuration of Second Guide Frame 120 FIG. 7 is a perspective view of the second guide frame 120.
The second guide frame 120 includes a second guide frame main body 121 and two locking portions 122.
The second guide frame main body 121 is formed in a cylindrical shape and has an inner peripheral surface 120S and an outer peripheral surface 120T.

  The two locking portions 122 are erected on the rear end surface of the second guide frame main body 121 and protrude rearward. Further, the two locking portions 122 are formed at substantially symmetrical positions around the optical axis AX (see FIG. 3). As will be described later, when the two locking portions 122 are locked to the third guide frame 130, relative rotation of the third guide frame 130 with respect to the second guide frame 120 is suppressed. In the present embodiment, one of the two locking portions 122 is formed longer in the circumferential direction than the other.

  In the first embodiment, the locking portions 122 are provided at two locations. This is because the two guide protrusions A3 of the second rotation frame 220 are provided at two locations, so that the rotatable range of the second guide frame 120 is increased. This will be specifically described. The guide protrusion A3 protrudes from the second rotating frame in the outer peripheral direction and is engaged with the first rotating frame 210. On the other hand, the locking portion 122 protrudes toward the non-subject side of the second guide frame 120 and is engaged with the third guide frame 130. Therefore, when the second rotating frame 220 rotates relative to the second guide frame 120, the locking portion 122 and the guide protrusion A3 interfere with each other. Therefore, if the locking part 122 and the guide protrusion A3 are provided, for example, at three or more locations, they interfere with each other to reduce the rotatable range. Therefore, as in the first embodiment, if the locking portion 122 is two places or less and the guide protrusion A3 is two places or less, the relative rotation range of the second rotation frame 220 relative to the second guide frame 120 is increased. be able to.

The second guide frame 120 has three cam followers AB2, three guide grooves a4, and an engagement groove e2.
The three cam followers AB2 are erected at the rear end portion of the outer peripheral surface 120T, and are arranged at a substantially equal pitch in the circumferential direction. The three cam followers AB2 include a cam follower AB21 and a guide protrusion AB22, and the cam follower AB21 is engaged with the cam grooves b2 of the three through grooves k1 of the first rotating frame 210. The guide protrusions AB22 of the three cam followers AB2 are inserted into the through holes k11 of the three through grooves k1 and engaged with the three guide grooves a2 of the first guide frame 110.

The three guide grooves a4 are formed on the inner peripheral surface 120S along the optical axis direction. The three guide grooves a4 are arranged at a substantially equal pitch in the circumferential direction.
The engagement groove e2 is formed at the rear end portion of the inner peripheral surface 120S along the circumferential direction. The engagement groove e2 intersects with the three guide grooves a4.

5. Configuration of Second Rotating Frame 220 FIG. 8 is a perspective view of the second rotating frame 220.
The second rotary frame 220 includes a second rotary frame main body 221, three guide protrusions A3, three engagement protrusions E2, two engagement grooves e3, three cam grooves b3, and three It has a cam groove b4 and three cam grooves b5. However, in FIG. 8, two cam grooves b3, cam grooves b4, and cam grooves b5 are shown.
The second rotary frame main body 221 is formed in a cylindrical shape and has an inner peripheral surface 220S and an outer peripheral surface 220T.

The three guide protrusions A3 are erected at the rear end portion of the outer peripheral surface 220T, two of the three guide protrusions A3 are close to each other in the circumferential direction, and the other one is the two adjacent guide protrusions A3 to 120. Formed apart by more than °. The three guide protrusions A3 are engaged with the three guide grooves a3 of the first rotary frame 210.
The three engagement protrusions E2 are formed along the circumferential direction at the rear end portion of the outer peripheral surface 220T. The three engagement protrusions E2 are disposed in front of the three guide protrusions A3. The engagement protrusion E <b> 2 is engaged with the engagement groove e <b> 2 of the second guide frame 120. In the present embodiment, the engagement protrusion E2 and the engagement groove e2 constitute an engagement mechanism for rotatably engaging the second rotation frame 220 with the second guide frame 120.

The two engagement grooves e3 are formed in a substantially central portion of the inner peripheral surface 220S along the circumferential direction. The two engagement grooves e3 are formed in parallel to each other. The two engagement grooves e3 intersect with the cam groove b4 and the cam groove b5.
The three cam grooves b3 are formed on the outer peripheral surface 220T so as to intersect the optical axis direction, and are arranged at substantially equal pitches in the circumferential direction.
The cam groove b4 and the cam groove b5 are formed on the inner peripheral surface 220S. The cam groove b4 and the cam groove b5 intersect each other.

6). Configuration of Third Guide Frame 130 FIG. 9 is a perspective view of the third guide frame 130.
The third guide frame 130 includes a third guide frame main body 131, a flange portion 132, and two locking recesses 133.
The third guide frame main body 131 is formed in a cylindrical shape and has an inner peripheral surface 130S and an outer peripheral surface 130T.
The flange portion 132 is formed in an annular shape and is erected on the rear end portion of the outer peripheral surface 130T.

  The two locking recesses 133 are notches formed on the outer edge of the flange portion 132. The two locking recesses 133 are formed at substantially symmetrical positions around the optical axis AX (see FIG. 3). Here, FIG. 10 is a schematic diagram showing a state in which the second guide frame 120, the second rotary frame 220, and the third guide frame 130 are assembled. As shown in FIG. 10, the two guide portions 122 of the third guide frame 130 are locked by the two lock portions 122 of the second guide frame 120 being locked to the two lock recesses 133 of the third guide frame 130. Relative rotation with respect to 120 is suppressed. Incidentally, one of the two locking recesses 133 is formed longer in the circumferential direction than the other, corresponding to one of the two locking portions 122 being longer in the circumferential direction than the other. Thereby, the strength of the two locking recesses 133 is improved.

The third guide frame 130 has two engagement protrusions E3, three guide grooves a5, and three guide grooves a6. However, in FIG. 9, only two engagement protrusions E3 are shown.
The two engagement protrusions E3 are formed along the circumferential direction at a substantially central portion of the outer peripheral surface 130T. The two engagement protrusions E3 are formed in parallel to each other. The two engagement protrusions E3 are engaged with the two engagement grooves e3 of the second rotation frame 220. In the present embodiment, the engagement protrusion E3 and the engagement groove e3 constitute an engagement mechanism for rotatably engaging the third guide frame 130 with the second rotation frame 220.

The three guide grooves a5 penetrate the third guide frame main body 131 from the inner peripheral surface 130S to the outer peripheral surface 130T. The three guide grooves a5 extend along the optical axis direction and are arranged at substantially equal pitches in the circumferential direction.
The three guide grooves a6 penetrate the third guide frame body 131 from the inner peripheral surface 130S to the outer peripheral surface 130T. The three guide grooves a6 extend along the optical axis direction and are arranged at substantially equal pitches in the circumferential direction.
In the present embodiment, the three guide grooves a5 and the three guide grooves a6 are alternately arranged in the circumferential direction.

7). Configuration of First Lens Group Frame 310 FIG. 11 is a perspective view of the first lens group frame 310.
The first lens group frame 310 includes a first lens group frame main body 311, three guide protrusions A4, and three cam protrusions B3.

The first lens group frame body 311 is formed in a cylindrical shape, and has an inner peripheral surface 310S and an outer peripheral surface 310T. The first lens group frame main body 311 is formed with three projecting portions 311a projecting rearward.
The three guide protrusions A4 are erected on the outer peripheral surface 310T of the protruding portion 311a, and are arranged at a substantially equal pitch in the circumferential direction. The three guide protrusions A4 are engaged with the three guide grooves a4 of the second guide frame 120.

The three cam protrusions B3 are erected on the inner peripheral surface 310S of the protruding portion 311a, and are arranged at a substantially equal pitch in the circumferential direction. The three cam protrusions B3 are engaged with the three cam grooves b3 of the second rotating frame 220.
In the present embodiment, the three guide protrusions A4 and the three cam protrusions B3 are disposed substantially opposite to each other with the protrusion 311a interposed therebetween.

8). Configuration of Second Lens Group Frame 320 FIG. 12 is a perspective view of the second lens group frame 320.
The second lens group frame 320 includes a second lens group frame main body 321, three guide protrusions A5, and three cam protrusions B4.
The second lens group frame main body 321 is formed in a cup shape and has an outer peripheral surface 320T.

The three guide protrusions A5 are formed on the rear end portion of the outer peripheral surface 320T, and are arranged at a substantially equal pitch in the circumferential direction. The three guide protrusions A5 are engaged with the three guide grooves a5 of the third guide frame 130.
The three cam protrusions B4 are formed on the three guide protrusions A5. The three cam protrusions B4 are engaged with the three cam grooves b4 of the second rotating frame 220.

9. Configuration of Third Lens Group Frame 330 FIG. 13 shows a state in which the third lens group frame 330 is housed inside the shutter frame 335. The configuration of the third lens group frame 330 will be described with reference to FIG.
The third lens group frame 330, that is, an OIS (Optical Image Stabilizer) unit mainly includes an OIS frame 400, a retractable lens frame 401, and a third lens group L3 for image blur correction.

  The OIS frame 400 is attached to the shutter frame 335. Specifically, the OIS frame 400 is movable in a plane perpendicular to the optical axis. More specifically, a magnet (not shown) is fixed to the OIS frame 400, and a coil (not shown) is fixed to the shutter frame 335 at a position facing the magnet. In this state, when electric power is supplied from a camera circuit (not shown) to the coil of the shutter frame, a current flows through the coil to generate a magnetic field. The magnetic field drives the magnet of the OIS frame 400, and the driving force moves the OIS frame 400 in a plane perpendicular to the optical axis.

  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 moves from a correctable position (first posture) where the third lens unit L3 can perform image blur correction to a retracted position (second posture) where the third lens unit L3 is retracted from the optical axis. Its position can be changed. The retractable lens frame 401 holds a third lens unit L3 including at least one lens.

10. Configuration of Shutter Frame 335 Next, the configuration of the shutter frame 335 will be described with reference to FIG.
The shutter frame 335 includes a shutter frame main body 336, three guide protrusions A6, and three cam protrusions B5.
The shutter frame body 336 is formed in a cylindrical shape and has an outer peripheral surface 335T.
The three guide protrusions A6 are formed on the outer peripheral surface 335T, and are arranged at a substantially equal pitch in the circumferential direction. The three guide protrusions A6 are engaged with the three guide grooves a6 of the third guide frame 130.
The three cam protrusions B5 are erected on the front end portions of the three guide protrusions A6. The three cam protrusions B5 are engaged with the three cam grooves b5 of the second rotating frame 220.

11. Engagement of Frames FIGS. 14 to 16 are sectional views of the lens barrel 20. 14 to 16 are schematic diagrams in which a plurality of cut surfaces passing through the optical axis AX are combined. 14 shows the retracted state of the lens barrel 20, FIG. 15 shows the wide state of the lens barrel 20, and FIG. 16 shows the tele state of the lens barrel 20. In the present embodiment, the shootable state of the digital camera 1 means the state of the lens barrel 20 from the wide state to the tele state.

The gear portion 212 of the first rotating frame 210 is meshed with the zoom gear 242 (not shown). The cam follower B1 of the first rotating frame 210 is engaged with the cam groove b1 of the fixed frame 100. Therefore, the first rotating frame 210 can move in the optical axis direction while rotating in the circumferential direction by the driving force of the zoom motor 241.
The guide projection A1 of the first guide frame 110 is engaged with the guide groove a1 of the fixed frame 100. The engaging protrusion E1 of the first rotating frame 210 is engaged with the engaging groove e1 of the first guide frame 110. Accordingly, the first guide frame 110 can move together with the first rotation frame 210 and can move in a state in which the rotation is restricted with respect to the fixed frame 100.

  The cam follower AB2 of the second guide frame 120 has a cam follower AB21 and a guide projection AB22, and the cam follower AB21 is engaged with the three cam grooves b2 of the first rotation frame 210. The guide protrusion AB22 is inserted through the three through holes k11 and is engaged with the guide groove a2 of the first guide frame 110. Therefore, the second guide frame 120 is moved in the optical axis direction in a state in which the rotation of the first rotation frame 210 is restricted with respect to the guide frame 110.

The guide protrusion A3 of the second rotary frame 220 is engaged with the guide groove a3 of the first rotary frame 210. Further, the engagement protrusion E <b> 2 of the second rotation frame 220 is engaged with the engagement groove e <b> 2 of the second guide frame 120. Therefore, the second rotating frame 220 is movable in the optical axis direction together with the second guide frame 120 while rotating in the circumferential direction together with the first rotating frame 210.
The locking portion 122 of the second guide frame 120 is locked to the locking recess 133 of the third guide frame 130. Further, the engagement protrusion E <b> 3 of the third guide frame 130 is engaged with the engagement groove e <b> 3 of the second rotation frame 220. Of the intervals between the three guide projections A3 of the second rotation frame 220, at least two intervals are arranged at a distance of approximately 120 ° or more, and the interval between the two locking portions 122 of the second guide frame 120 is also approximately 120 °. They are arranged apart from each other, and their relative rotation angles during zoom driving are set to approximately 120 ° or less. Therefore, the third guide frame 130 is moved in the optical axis direction together with the second guide frame 120 in a state where the rotation is restricted with respect to the second guide frame 120 without interfering with the rotation of the second rotation frame 220. .

Corresponding to one of the two locking portions 122 being longer in the circumferential direction than the other, one of the two locking recesses 133 is formed longer in the circumferential direction than the other. It is desirable that the guide frame 130 be elongated in the circumferential direction as long as it does not interfere with the rotation of the second rotary frame 220.
In addition, at least two intervals among the three guide protrusions A3 of the second rotation frame 220 are approximately 150 °, and the interval between the two locking portions 122 of the second guide frame 120 is also approximately 150 °. The relative rotation angle of each other during zoom driving is set to approximately 150 ° or less. Therefore, the third guide frame 130 does not interfere with the rotation of the second rotation frame 220. The same applies to other angles.

The guide protrusion A4 of the first lens group frame 310 is engaged with the guide groove a4 of the second guide frame 120. Further, the cam protrusion B3 of the first lens group frame 310 is engaged with the cam groove b3 of the second rotation frame 220. Accordingly, the first lens group frame 310 is moved in the optical axis direction in a state where the rotation of the first lens group frame 310 is restricted with respect to the guide frame 120 according to the rotation of the second rotation frame 220.
The guide protrusion A5 of the second lens group frame 320 is engaged with the guide groove a5 of the third guide frame 130. Further, the cam protrusion B4 of the second lens group frame 320 is engaged with the cam groove b4 of the second rotation frame 220. Accordingly, the second lens group frame 320 is moved in the optical axis direction in a state where the rotation of the second lens group frame 320 is restricted with respect to the guide frame 130 according to the rotation of the second rotation frame 220.

The guide protrusion A6 of the shutter frame 335 is engaged with the guide groove a6 of the third guide frame 130. Further, the cam projection B5 of the shutter frame 335 is engaged with the cam groove b5 of the second rotation frame 220. Therefore, the shutter frame 335 is moved in the optical axis direction in a state where the rotation of the shutter frame 335 is restricted with respect to the guide frame 130 according to the rotation of the second rotation frame 220.
A third lens group frame 330 is attached to the shutter frame 335, and when the shutter frame 335 moves in the optical axis direction in a state where the rotation is restricted with respect to the third guide frame 130, the third lens group frame 330 is retracted. The lens frame 401 is rotated by a retracting mechanism (not shown). As a result, when shifting from the retracted state to the photographing enabled state, the retractable lens frame 401 moves from the retracted position to the correctable position. Further, when shifting from the photographing enabled state to the retracted state, the retractable lens frame 401 moves from the correctable position to the retracted position. When the retractable lens frame 401 is disposed at the correctable position, the third lens unit L3 is movable in a plane perpendicular to the optical axis. That is, in this state, image blur correction can be performed.

  As described above, the rotation restriction of the first to third guide frames 110 to 130 and the lens group frames 310, 320, and 335 by the rotation of the first rotation frame 210 and the second rotation frame 220 by the driving force of the zoom motor 241. The movement in the performed state is realized.

<Assembly method of lens barrel 20>
Hereinafter, a method for assembling the lens barrel 20 will be described.
First, the third guide frame 130 is inserted from the rear of the second rotation frame 220. Subsequently, the third guide frame 130 is rotated in the circumferential direction to be in the tele state.
Next, the second lens group frame 320 is inserted from behind the third guide frame 130.
Next, the retractable lens frame 401 is inserted from the front of the OIS frame 400, and the OIS frame 400 is rotatably attached to the retractable lens frame 401.

Next, the OIS frame 400 is inserted from the front of the shutter frame 335.
Next, the shutter frame 335 is inserted from behind the third guide frame 130.
Subsequently, the second lens group frame 320 is rotated in the circumferential direction to be in a retracted state.
Next, the second rotating frame 220 is inserted from the rear of the first lens group frame 310.
Next, the second guide frame 120 is covered from the front of the first lens group frame 310.

Next, the first rotating frame 210 is inserted from the rear of the first guide frame 110. Subsequently, the second guide frame 120 is inserted from the rear of the first rotation frame 210.
Next, the first guide frame 110 is inserted from behind the fixed frame 100.
Finally, each frame is rotated to be in the retracted state.

<Operation and effect of the first aspect>
The lens barrel 20 includes a cylindrical fixed frame 100, a cylindrical first guide frame 110, a cylindrical first rotating frame 210, and a cylindrical second guide frame 120.
The fixed frame 100 has a guide groove a1 and a cam groove b1 formed on the inner peripheral surface 100S.
The first guide frame 110 is disposed on the radially inner side of the fixed frame 100. The first guide frame 110 has a guide projection A1 formed on the outer peripheral surface 110T and engaged with the guide groove a1, and a guide groove a2 formed on the inner peripheral surface 110S.
The first rotation frame 210 is disposed on the radially inner side of the first guide frame 110. The first rotating frame 210 has a cam follower B1 formed on the outer peripheral surface 210T and engaged with the cam groove b1, and a through groove k1 formed on the inner surface of the first rotating frame main body 211. The through groove k1 has a cam groove b2 and a through hole k11.

The second guide frame 120 is disposed on the radially inner side of the first rotating frame 210. The second guide frame 120 has a cam follower AB21 formed on the outer peripheral surface 120T and engaged with the cam groove b2, and a guide protrusion AB22 engaged with the guide groove a2 through the through hole k11.
Thus, since the first guide frame 110 is disposed outside the first rotation frame 210, the cam follower B1 of the first rotation frame 210 is behind the first guide projection A1 of the first guide frame 110 in the optical axis direction. Can be placed. Therefore, compared with the case where the first rotating frame 210 is disposed outside the first guide frame 110, the length of the first cam groove b1 of the fixed frame 100 is increased without increasing the total length of the lens barrel 20 in the optical axis direction. The front wall can be formed thick. Accordingly, the lens barrel 20 can be made compact while maintaining the amount of movement of the first rotating frame 210 relative to the fixed frame 100, that is, maintaining the zoom magnification, and the strength against external force such as dropping can be improved.

Moreover, since the gear part 212 of the 1st rotation frame 210 can be arrange | positioned behind the guide protrusion A1 of the 1st guide frame 110, the front support part 102 of the fixed frame 100 protrudes from the housing | casing 10 as shown in FIG. Can be suppressed. Therefore, the design of the camera can be improved.
In addition, the correspondence example of the term in a claim is demonstrated for reference. The correspondence of the claims is not limited to this. The fixed frame 100 is an example of a first frame. The first guide frame 110 is an example of a second frame. The first rotating frame 210 is an example of a third frame. The second guide frame 120 is an example of a fourth frame. The second rotating frame 220 is an example of a fifth frame. The third guide frame 130 is an example of a sixth frame. The first lens group frame is an example of a seventh frame.

<Other embodiments of the first aspect>
(A) In the above embodiment, the lens barrel 20 is a three-stage retractable type including the first guide frame 110, the second guide frame 120, and the first lens group frame 310. However, the present invention is not limited to this. is not. The lens barrel 20 may be a two-stage collapsible type that includes a first guide frame 110 and a second guide frame 120. In this case, the lens barrel 20 may not include the second rotating frame 220 and the third guide frame 130. Furthermore, the lens barrel 20 may be a retractable type having four or more stages.

(B) In the above embodiment, the cam groove b is formed in one of the two frames and the cam follower B is formed in the other frame, but the present invention is not limited to this. The cam follower B may be formed in one of the two frames, and the cam groove b may be formed in the other frame. Moreover, the cam groove b and the cam follower B may be formed in each of the two frames.
(C) In the above embodiment, the guide groove a is formed in one of the two frames and the guide protrusion A is formed in the other frame, but the present invention is not limited to this. The guide protrusion A may be formed on one of the two frames, and the guide groove a may be formed on the other frame. Moreover, the guide groove a and the guide protrusion A may be formed in each of the two frames.

(D) In the above embodiment, the engagement groove e is formed in one of the two frames and the engagement protrusion E is formed in the other frame. However, the present invention is not limited to this. The engagement protrusion E may be formed on one of the two frames, and the engagement groove e may be formed on the other frame. Moreover, the engagement groove | channel e and the engagement protrusion E may be formed in each of two frames.
(E) In the above embodiment, the third lens group frame 330 is retracted to the side of the second lens group frame 320 in the retracted state, but the present invention is not limited to this. The third lens group frame 330 may be disposed behind the second lens group frame 320 in the retracted state.

(F) In the above embodiment, the entire guide grooves a1 to a6 are linear along the optical axis direction. However, the present invention is not limited to this. Each of the guide grooves a <b> 1 to a <b> 6 may have a straight part that is parallel to the optical axis direction and linearly formed, and a part that has an angle with respect to the optical axis direction, either alone or both. Good.
(G) In the above embodiment, the fixed frame 100 that is an example of the first frame is fixed in the housing 10 and constitutes a part of the fixed barrel portion 24, but is not limited thereto. It is not a thing. The first frame may constitute a part of the movable lens barrel.

  (H) In the above embodiment, the through groove k1 has the through hole k11 penetrating from the cam bottom surface of the cam groove b2 to the outer peripheral surface 210T adjacent to the outer diameter side of the cam groove b2. It is not limited to. The cam groove b2 may not penetrate, and the through hole k11 may be disposed at a position different from the cam groove b2 in the circumferential direction. In this case, the cam follower AB21 is engaged with the cam groove b2 with the cam bottom, and the guide protrusion AB22 is inserted through the through hole k11 and engaged with the guide groove a2.

  (I) In the above-described embodiment, the cam groove b2 is only the through-hole k11 penetrating from the cam bottom surface to the outer peripheral surface 210T adjacent to the outer diameter side to form the through-groove k1. It is not limited. In addition to the cam groove b2 in which the through hole k11 is adjacent to the outer diameter side, the through hole k11 may not be adjacent to the outer diameter side, and a cam groove b2 with a cam bottom may be disposed. In this case, the cam follower AB21 in which the guide protrusion AB22 is not adjacent to the outer diameter side is engaged with the cam groove b2 with the cam bottom.

<Operation and effect of the second aspect>
(1) The lens barrel 20 includes a cylindrical first guide frame 110, a cylindrical first rotary frame 210, a cylindrical second guide frame 120, a second rotary frame 220, and a third guide frame. 130. The first guide frame 110 has a guide groove a2 formed on the inner peripheral surface 110S. The first rotation frame 210 is disposed on the radially inner side of the first guide frame 110. The first rotating frame 210 has a through groove k1 formed on the inner peripheral surface and a guide groove a3 formed on the inner peripheral surface. The through groove k1 has a cam groove b2 and a through hole k11. The second guide frame 120 is disposed on the radially inner side of the first rotating frame 210. The second guide frame 120 has a cam follower AB21 formed on the outer peripheral surface 120T and engaged with the cam groove b2, and a guide protrusion AB22 engaged with the guide groove a2 through the through hole k11. The second rotating frame 220 is disposed on the radially inner side of the second guide frame 120. The second rotating frame 220 has a guide protrusion A3 formed on the outer peripheral surface 220T and engaged with the guide groove b3. The third guide frame 130 is engaged with the second rotary frame 220 by the engagement mechanism on the radially inner side of the second guide frame 120. A part of the second guide frame 120 is locked to the locking recess 133 of the third guide frame 130.

  As described above, the locking portion 122 of the second guide frame 120 is locked to the locking recess 133 of the third guide frame 130, whereby the rotation of the third guide frame 130 is restricted. Moreover, the 2nd rotation frame 220 and the 3rd guide frame 130 are engaged by the engagement mechanism. Therefore, it is not necessary to provide a cam groove or a through hole in the first rotating frame 210 in order to restrict the rotation of the third guide frame 130. Therefore, the design freedom of the cam groove b2 in the second rotating frame 220 can be improved.

<Other Embodiments of Second Aspect>
(A) In the above embodiment, the second guide frame 120 has the cam follower AB21 and the guide projection AB22. However, the third guide frame 130 has the cam follower AB21 and the guide projection AB22 instead of the second guide frame 120. It may be. In this case, the second guide frame 120 does not need to be engaged with the first rotation frame 210.

  (B) In the above-described embodiment, the third guide frame 130 is not engaged with the first rotation frame 210, but is not limited thereto. Cam grooves may be formed on the inner peripheral surface 210 </ b> S of the first rotating frame 210, and cam followers that are engaged with the cam grooves of the first rotating frame 210 may be formed on the outer peripheral surface 130 </ b> T of the third guide frame 130. In this case, it is possible to suppress the third moving lens barrel portion 23 from being detached from the second moving lens barrel portion 22 due to an external force applied to the third moving lens barrel portion 23.

As described in (A) above, when the third guide frame 130 has the cam follower AB21 and the guide projection AB22, the second guide frame 120 may be engaged with the first rotation frame 210.
(C) In the above embodiment, the lens barrel 20 is a three-stage retractable type, but is not limited to this. The lens barrel 20 may be a retractable type having four or more stages.

(D) In the above embodiment, the cam groove b is formed in one of the two frames and the cam follower B is formed in the other frame, but the present invention is not limited to this. The cam follower B may be formed in one of the two frames, and the cam groove b may be formed in the other frame. Moreover, the cam groove b and the cam follower B may be formed in each of the two frames.
(E) In the above embodiment, the guide groove a is formed in one of the two frames and the guide protrusion A is formed in the other frame, but the present invention is not limited to this. The guide protrusion A may be formed on one of the two frames, and the guide groove a may be formed on the other frame. Moreover, the guide groove a and the guide protrusion A may be formed in each of the two frames.

(F) In the embodiment described above, the engagement groove e is formed in one of the two frames and the engagement protrusion E is formed in the other frame, but the present invention is not limited to this. The engagement protrusion E may be formed on one of the two frames, and the engagement groove e may be formed on the other frame. Moreover, the engagement groove | channel e and the engagement protrusion E may be formed in each of two frames.
(G) In the above embodiment, the third lens group frame 330 is retracted to the side of the second lens group frame 320 in the retracted state, but the present invention is not limited to this. The third lens group frame 330 may be disposed behind the second lens group frame 320 in the retracted state.

(H) In the above embodiment, the first rotating frame 210 is arranged on the inner side in the radial direction of the fixed frame 100, but the present invention is not limited to this. Another frame may be interposed between the first rotating frame 210 and the fixed frame 100.
(I) In the above embodiment, the entire guide grooves a1 to a6 are linear along the optical axis direction, but the present invention is not limited to this. Each of the guide grooves a <b> 1 to a <b> 6 may have a straight part that is parallel to the optical axis direction and linearly formed, and a part that has an angle with respect to the optical axis direction, either alone or both. Good.

  (J) In the above embodiment, the through groove k1 is arranged such that the through hole k11 penetrating from the cam bottom surface of the cam groove b2 to the outer peripheral surface 210T is disposed adjacent to the outer diameter side of the cam groove b2. It is not limited to. The cam groove b2 may not penetrate, and the through hole k11 may be disposed at a position different from the cam groove b2 in the circumferential direction. In this case, the cam follower AB21 is engaged with the cam groove b2 with the cam bottom, and the guide protrusion AB22 is inserted through the through hole k11 and engaged with the guide groove a2.

(K) In the above embodiment, the cam groove b2 is only the one that forms the through groove k1 with the through hole k11 penetrating from the cam bottom surface to the outer peripheral surface 210T adjacent to the outer diameter side. It is not limited. In addition to the cam groove b2 in which the through hole k11 is adjacent to the outer diameter side, the through hole k11 may not be adjacent to the outer diameter side, and a cam groove b2 with a cam bottom may be disposed. In this case, the cam follower AB21 in which the guide protrusion AB22 is not adjacent to the outer diameter side is engaged with the cam groove b2 with the cam bottom.
(L) Although the second guide frame 120 has the cam follower AB21 and the guide protrusion AB22 in the above embodiment, the present invention is not limited to this. The second guide frame 120 may have one of the cam follower AB21 and the guide projection AB22, and the third guide frame 130 may have the other.

<Operation and effect of the third aspect>
The lens barrel 20 includes a cylindrical first guide frame 110, a cylindrical first rotary frame 210, a cylindrical second guide frame 120, a cylindrical second rotary frame 220, and a cylindrical first guide frame. 1 lens group frame 310.

The first guide frame 110 has a guide groove a2 formed on the inner peripheral surface 110S. The first rotation frame 210 is disposed on the radially inner side of the first guide frame 110. The first rotating frame 210 has a through groove k1 that penetrates from the inner peripheral surface 210S to the outer peripheral surface 210T, and a guide groove a3 formed in the inner peripheral surface 210S. The through groove k1 has a cam groove b2 and a through hole k11.
The second guide frame 120 is disposed on the radially inner side of the first rotating frame 210. The second guide frame 120 has a cam follower AB21 formed on the outer peripheral surface 120T and engaged with the cam groove b2, and a guide protrusion AB22 engaged with the guide groove a2 through the through hole k11.

The second rotary frame 220 is disposed on the radially inner side of the second guide frame 120 and is engaged with the second guide frame 120 by an engagement mechanism. The second rotary frame 220 has a guide projection A3 that is engaged with the guide groove a3 on the outer peripheral surface 220T.
The first lens group frame 310 is disposed between the second guide frame 120 and the second rotation frame 220 in the radial direction. The first lens group frame 310 is engaged with the second rotation frame 220 by a cam mechanism. The cam follower AB21 overlaps with the engagement mechanism in the radial direction.

  Thus, since the cam follower AB21 and the engagement mechanism overlap in the radial direction, the stroke amount of the first lens group frame 320 is increased as compared with the case where the engagement mechanism is disposed in front of the cam follower AB21. be able to. As a result, the zoom magnification can be increased when the entire length of the lens barrel 20 is maintained, and the entire length of the lens barrel 20 can be shortened when the zoom magnification is maintained.

<Other embodiments>
(A) In the above embodiment, the lens barrel 20 is a three-stage retractable type, but is not limited to this. The lens barrel 20 may be a retractable type having four or more stages.
(B) 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.

(C) In the above embodiment, the guide groove a is formed in one of the two frames and the guide protrusion A is formed in the other frame, but the present invention is not limited to this. The guide protrusion A may be formed on one of the two frames, and the guide groove a may be formed on the other frame. Moreover, the guide groove a and the guide protrusion A may be formed in each of the two frames.
(D) In the above embodiment, the engagement groove e is formed in one of the two frames and the engagement protrusion E is formed in the other frame. However, the present invention is not limited to this. The engagement protrusion E may be formed on one of the two frames, and the engagement groove e may be formed on the other frame. Moreover, the engagement groove | channel e and the engagement protrusion E may be formed in each of two frames.

(E) In the above embodiment, the third lens group frame 330 is retracted to the side of the second lens group frame 320 in the retracted state, but the present invention is not limited to this. The third lens group frame 330 may be disposed behind the second lens group frame 320 in the retracted state.
(F) In the above embodiment, the first rotating frame 210 is arranged on the inner side in the radial direction of the fixed frame 100. However, the present invention is not limited to this. Another frame may be interposed between the first rotating frame 210 and the fixed frame 100.

  (G) In the above embodiment, the entire guide grooves a1 to a6 are linear along the optical axis direction. However, the present invention is not limited to this. Each of the guide grooves a <b> 1 to a <b> 6 may have a linear portion formed linearly and an extending portion extending obliquely from the linear portion.

  According to the technology disclosed herein, a lens barrel that can be made compact can be provided, and can be applied to, for example, a camera, a mobile phone with a camera, a portable terminal with a camera, and the like.

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 1st guide frame 120 ... 2nd guide frame 122 ... locking part 130 ... 3rd guide frame 133 ... locking recess 210 ... 1st rotation frame 212 ... gear part 220 ... 2nd rotation frame 241 ... zoom motor 242 ... zoom gear 310 ... 1st lens group frame 320 ... 2nd lens group frame 330 ... 3rd lens group frame 335 ... Shutter frame a1-a6 ... Guide groove A1, A3-A6 ... Guide protrusion b1-b5 ... Cam groove B1, B3-B5 ... Cam follower AB2 ... cam follower AB21 ... cam follower AB22 ... guide protrusions e1 to e3 ... engagement grooves E1 to E3 ... engagement protrusion k1 ... through groove k11 ... through hole

Claims (8)

A second frame having a cylindrical shape and having a second guide groove on the inner peripheral surface;
A third frame disposed radially inside the second frame and having a second cam groove on an inner peripheral surface;
A moving frame having a second cam follower that is disposed radially inward of the third frame and is engaged with the second cam groove;
With
The third frame is formed with a through hole penetrating from the inside in the radial direction to the outside,
The moving frame has a second guide protrusion that is engaged with the second guide groove in a state of being inserted into the through hole,
The moving frame moves in a cylindrical axis direction in a state in which the third frame rotates relative to the two frames and the rotation of the third frame is restricted with respect to the second frame.
Lens barrel. A cylindrical first frame having a first guide groove on the inner peripheral surface and a first cam groove on the inner peripheral surface;
A first guide projection disposed radially inward of the first frame and engaged with the first guide groove; and a second frame having a second guide groove on the inner peripheral surface;
A first cam follower that is disposed radially inward of the second frame and is engaged with the first cam groove; and a third frame having a second cam groove on the inner peripheral surface;
A fourth frame having a second cam follower disposed radially inside the third frame and engaged with the second cam groove;
With
The third frame is formed with a through hole penetrating from the inside in the radial direction to the outside,
The fourth frame has a second guide protrusion that is engaged with the second guide groove in a state of being inserted into the through hole,
The fourth frame moves in the direction of the cylindrical axis in a state in which the rotation of the third frame relative to the one frame is restricted with respect to the first frame.
Lens barrel. The first frame holds a drive gear;
The third frame has a gear portion meshed with the drive gear on the outer peripheral surface,
The second guide protrusion of the second frame is disposed closer to the subject side than the gear portion of the third frame.
The lens barrel according to claim 2. The gear portion is located at an end of the third frame;
The second guide protrusion is located at an end of the second frame;
The lens barrel according to claim 3. The cam follower is located at the same end of the third frame as the gear portion,
The lens barrel according to claim 2. The third frame has a third guide groove on the inner peripheral surface,
The moving frame is a fourth frame arranged on the radially inner side of the third frame,
A fifth frame having a third guide protrusion disposed on the radially inner side of the fourth frame and engaged with the third guide groove;
A sixth frame having a first movement restricting mechanism that is disposed on a radially inner side of the fourth frame and restricts the movement of the fifth frame in the cylindrical axis direction;
With
The fourth frame has a first rotation restricting mechanism for restricting rotation of the sixth frame in the cylindrical axis direction,
When the third frame rotates relative to the second frame, the fifth frame rotates relative to the fourth frame and the sixth frame, and the fourth frame and the sixth frame. Move in the direction of the cylindrical axis with
The lens barrel according to claim 1. The third frame has a third guide groove on the inner peripheral surface,
A fourth frame disposed radially inward of the third frame;
A fifth frame having a third guide protrusion disposed on the radially inner side of the fourth frame and engaged with the third guide groove;
With
The moving frame is a sixth frame that is disposed on the radially inner side of the fourth frame and has a first movement restricting mechanism that restricts the movement of the fifth frame in the cylindrical axis direction,
The fourth frame has a first rotation restricting mechanism for restricting rotation of the sixth frame in the cylindrical axis direction,
When the third frame rotates relative to the second frame, the fifth frame rotates relative to the fourth frame and the sixth frame, and the fourth frame and the sixth frame. Move in the direction of the cylindrical axis with
The lens barrel according to claim 1. The moving frame is a fourth frame arranged on the radially inner side of the third frame,
An engagement frame having an engagement mechanism to be engaged with the fourth frame on the radially inner side of the fourth frame;
A seventh frame that is disposed between the fourth frame and the engagement frame in the radial direction, and advances and retreats with respect to the fourth frame and the engagement frame;
With
The engagement mechanism overlaps with a part of the second cam follower or the second guide protrusion as viewed from the radial direction.
The lens barrel according to claim 1.

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