WO2019131186A1

WO2019131186A1 - Lens barrel and camera

Info

Publication number: WO2019131186A1
Application number: PCT/JP2018/045948
Authority: WO
Inventors: 一郎今榮
Original assignee: 株式会社ニコン
Priority date: 2017-12-27
Filing date: 2018-12-13
Publication date: 2019-07-04
Also published as: JPWO2019131186A1; JP7180616B2

Abstract

Provided are a lens barrel and a camera that have improved operability for the insertion and removal of a movable section. The lens barrel 2 is attachable to a camera body 3 and comprises: an imaging optical system arranged along an optical axis OA; and a movable section 300 that is movable between an attachment position upon the optical axis OA and a retracted position retracted from the optical axis OA. The movement trajectory of the movable section 300 is convex.

Description

Lens barrel and camera

The present invention relates to a lens barrel and a camera.

Conventionally, there is a lens barrel in which a part of the lens group of the lens barrel can be inserted into and removed from the optical axis as a movable portion (see, for example, Patent Document 1).
The present invention provides a lens barrel and a camera in which the operability of the movable portion is further improved in a lens barrel provided with a movable portion that can be inserted and removed from a predetermined position.

JP, 2014-98812, A

The lens barrel of the first aspect is a lens barrel that can be mounted on a camera body, and the photographing optical system disposed along the optical axis, the mounting position on the optical axis, and the retraction from the optical axis And a movable portion movable between the retracted position and the retracted position, and the movement trajectory of the movable portion is convex.

The lens barrel according to the second aspect is a lens barrel mountable to a camera body, the photographing optical system being disposed along the optical axis, the mounting position on the optical axis, and the optical axis A movable portion movable between a retracted position and a retracted position, the lens barrel mounted on the camera body, and the movable portion being in a state of the horizontal position or the vertical position When moving from the retracted position to the mounting position, the center of the movable portion moves downward.

Furthermore, the lens barrel of the third aspect is a lens barrel that can be mounted on a camera body, and the photographing optical system disposed along the optical axis, the mounting position on the optical axis, and the optical axis Before reaching the mounting position or the retracted position during movement of the movable portion movable between the mounting position and the retracted position, and the movable portion movable between the retracted position and the retracted position. And a signal generation unit that detects a change in the mounting state of the movable unit.

The camera according to the fourth aspect is configured to include the lens barrel and a camera body.

FIG. 1 is a perspective view of a camera 1 including a lens barrel 2 of an embodiment and a camera body 3 on which the lens barrel 2 is mounted. It is a figure explaining an internal structure of lens barrel 2, and (a) shows a state where movable part 300 is in a mounting position, and (b) shows movable part 300 in a retreat position. It is the figure seen from the angle different from FIG. 2, (a) shows the state in which the movable part 300 is a mounting position, (b) is the movable part 300 in a retracted position. FIGS. 4A, 4B, and 4C are diagrams for explaining the movement state between the mounting position of the movable unit 300 and the retracted position. It is a figure showing gear part 50. As shown in FIG. It is a figure explaining the encoder which detects the mounting state of the movable part 300. FIG. When the camera 1 is in the vertical position, the direction of gravity applied to the movable portion 300 is shown. It is a figure which shows the operation state of the camera.

Embodiments of the present invention will be described below with reference to the drawings and the like. FIG. 1 is a perspective view of a camera 1 including a lens barrel 2 of the embodiment and a camera body 3 to which the lens barrel 2 is mounted. Although the lens barrel 2 is attachable to and detachable from the camera body 3 in the present embodiment, the lens barrel 2 and the camera body 3 may be integral with each other.

In the following description, the top, bottom, left, right, front and back directions when viewed from the photographer side when the camera 1 is in the horizontal position are also referred to as top, bottom, left, right, front, or back in the specification. The front-rear direction coincides with the direction of the optical axis OA.
Here, the horizontal position is
When the long side of the rectangular imaging element 4 (indicated by a dotted line in the figure) included in the camera body 3 extends in the horizontal direction,
When the handle portion 5 (lateral position handle 5 a) of the camera body 3 is in the right lateral direction of the imaging device 4 as viewed from the photographer,
When the release button 7a for the photographer who operates the camera body 3 to operate the photographing operation is in the upper right direction of the imaging device 4 as viewed from the photographer,
When the finder 6 and the flash light emitting unit 8 provided in the camera body 3 are in the upper direction of the imaging device 4,
When the tripod hole (not shown) provided in the camera body 3 is in the lower direction of the imaging device 4,
When at least one of the
The vertical position is a state in which the camera 1 is rotated 90 degrees counterclockwise as viewed from the photographer side from the state of the horizontal position from the photographer side, and the holding portion 5a for the horizontal position is on the upper side. It is in.

(Camera body 3)
The camera body 3 is a so-called digital single-lens reflex camera that performs image processing on object light incident on the imaging device 4 and records the light in a recording unit (not shown). However, the camera body is not limited to the digital single-lens reflex camera. It may be a mirrorless camera or a compact digital camera. Also, it may be a twin-lens camera. It may be a camera built into a smartphone or tablet. Furthermore, the present invention is not limited to a digital camera, and may be a film camera.

The camera body 3 is provided with a lateral position holding portion 5a which protrudes forward on the right side of the camera body 3 so that the user can stably hold the camera 1 in a horizontal position. Further, below the camera body 3, there is provided a vertical position holding portion 5b which protrudes forward so that the user can stably hold the camera 1 stably at the time of vertical position photographing. The vertical position handle 5 b may be detachable from the camera body 3.

Release buttons

7a and 7b are provided on the upper side and the lower side of the lateral position holding part 5, respectively. When the

release button

7a or 7b is half-pressed, the

release button

7a or 7b activates the autofocus function, and when the

release button

7a or 7b is full-pressed, the subject image is captured at a preset shutter speed.
The release button 7a provided on the upper side is a lateral position release button 7a used when the camera body 3 is in the lateral position. The release button 7b provided on the lower side is a vertical position release button 7b used when the camera body 3 is in the vertical position.

A finder 6 is provided on the rear surface of the camera body 3 above the imaging device 4. The finder 6 is not limited to the optical finder method, and may be an electronic view finder method, and can confirm the subject or composition, the focus position, various settings, and the like.
A tripod hole (not shown) is provided on the lower surface of the camera body 3. At the front center of the camera body 3, a body mount BM is provided.

(Lens barrel 2)
A lens mount LM is provided on the rear side of the lens barrel 2, and by engaging with a body mount BM of the camera body 3, the lens barrel 2 is detachably mounted on the camera body 3.

The lens barrel 2 is provided therein with an imaging optical system including a plurality of lens groups. In FIG. 1, only the frontmost lens L is shown.
On the outside of the lens barrel 2, an operation portion 21, a storage portion 22, and a strap mounting portion 23 are provided from the rear end toward the front side along the optical axis OA. The focus ring 24 and the zoom ring 25 are disposed further to the front than the strap mounting portion 23.

The strap mounting portion 23 is mounted on the left and right sides of the outer cylinder 26 b of the lens barrel 2, and the lens strap 27 can be mounted on the left and right strap mounting portions 23.

(Accommodating portion 22)
The housing portion 22 is a portion which covers the movable portion 300 including the teleconverter lens 30 described later at the retracted position and which protrudes in a convex shape from the exterior cylinder 26 a.

2 is a rear perspective view of the lens barrel 2 and is a view for explaining the internal structure of the lens barrel 2 from which the

exterior cylinders

26a and 26b covering the outer periphery of the lens barrel 2 are removed from the state of FIG. FIG. 3 is a view seen from a different angle from FIG. 2 and 3, (a) shows a state in which the movable portion 300 (teleconverter lens 30) is in the mounting position, and (b) shows a state in which the movable portion 300 (teleconverter lens 30) is in the retracted position. FIGS. 4A, 4B, and 4C are diagrams for explaining the movement of the movable unit 300 (teleconverter lens 30) between the mounting position and the retracted position. An inner cylinder 29 movably supporting the movable portion 300 is disposed on the inner diameter side of the outer cylinder 26a.

(Movable part 300)
The movable portion 300 includes a teleconverter lens 30 and a frame 31 covering the outer periphery of the teleconverter lens 30.

(Tele converter lens 30)
The teleconverter lens 30 is a lens group that extends the focal length. The mounting position is the position of the teleconverter lens 30 when the center (optical axis) of the teleconverter lens 30 is disposed on the optical axis OA of another photographing optical system, and the combined focal length becomes large, and the subject is It is possible to take a further enlarged picture. The retracted position is the position of the teleconverter lens 30 deviated from the optical path of the imaging optical system so as not to interfere with the optical path of the other imaging optical systems.

(Frame 31)
The frame 31 includes an annular frame 32 surrounding the outer periphery of the teleconverter lens 30, an arm 33 projecting outward from the annular frame 32, and a roller holding portion 34 projecting outward from the annular frame 32 as well. And.

(Arm part 33)
The arm portion 33 has a first portion 33a extending radially outward from the annular frame 32, and a second portion 33b extending obliquely outward with respect to the radial direction from the first portion 33a. The shape and arrangement of the first portion 33a and the second portion 33b of the arm portion 33 can be changed as appropriate. In the present embodiment, the first portion 33a and the second portion 33b are disposed along the outer peripheral surface of the lens barrel 2 when the movable portion 300 is at the retracted position, and the diameter of the lens barrel 2 is increased. It is preferable because it is prevented.
The tip of the second portion 33 b is attached to the rotation axis A 4 of the telecon rotation gear 54 of the gear unit 50 described later. When the second part 33b and the first part 33a rotate (rock) with the rotation of the telecon rotation gear 54, the movable part 300 rotates (rock) about the rotation axis A4.
In the embodiment, since the weight of the frame body 31 is lighter than the weight of the teleconverter lens 30, the center of gravity of the movable portion 300 is illustrated in FIG. 4 so as to substantially coincide with the center of the teleconverter lens 30. Further, since the teleconverter lens 30 and the annular ring frame 32 are cylindrical members centering on the optical axis of the teleconverter lens 30, the center of gravity of the movable portion 300 in the plane orthogonal to the optical axis direction is the teleconverter lens 30 It almost coincides with the center.

(Spring member 36)
A first mounting portion 33 c is provided at a position near the annular frame 32 in the first portion 33 a of the arm portion 33. In addition, a second mounting portion 33 d is provided on the fixing portion 29 a fixed to the inner cylinder 29. A spring member 36 is attached between the first attachment portion 33c and the second attachment portion 33d.
Although the spring member 36 is attached in the present embodiment, the present invention is not limited to this, and the first attachment portion 33c and the second attachment portion 33d may be biased to be mutually attractive and deformable if they can be deformed. It may be another elastic member.
Then, as described above, when the arm portion 33 rotates about the rotation axis A4 of the telecon rotation gear 54, the spring member 36 is fixed to the first attachment portion 33c about the one end attached to the second attachment portion 33d. The other end rotates. The spring member 36 only needs to be able to rotate at least one of the one end and the other end so that the arm portion 33 can rotate.

(Roller holding unit 34)
The roller holding portion 34 protrudes to the outside from a position different from the position different from the arm portion 33 in the annular frame 32 of the frame 31. A cylindrical portion 35 made of an elastic member is rotatably attached to an end of the roller holding portion 34 with respect to an axis extending in the direction of the optical axis OA. The cylindrical portion 35 is not limited to the elastic member, and may be another flexible member. Further, the cylindrical portion 35 may not be an elastic member, and the side of the contact wall 40 described below may be an elastic member or a flexible member.

(Abutment wall 40 (first limiting portion))
When the movable portion 300 (tele converter lens 30) is at the mounting position, the movable portion 300 (tele converter lens 30) is counterclockwise rotated by the spring force by the above-mentioned spring member 36 and the gravity applied to the movable portion 300 described later. A force is applied (the movement in the direction opposite to the direction to the retracted position, the movement to the left of the arrow R in the drawing).
For this reason, in order to limit the counterclockwise movement beyond the mounting position of the movable portion 300 (teleconverter lens 30), the contact wall portion 40 (first restriction portion) fixed to the inner cylinder 29 is provided. It is done. The contact wall portion 40 contacts the cylindrical portion 35 when the movable portion 300 (teleconverter lens 30) reaches the mounting position, and rotates the movable portion 300 (teleconverter lens 30) counterclockwise more than the mounting position. To prevent.

(Abutment member 41 (second limiting portion))
When the movable portion 300 (tele converter lens 30) is at the retracted position, the movable portion 300 (tele converter lens 30) is rotated clockwise (spring force by the above-described spring member 36 and gravity applied to the movable portion 300 described later). A force in the direction of movement toward the mounting position and movement in the opposite direction, movement to the right of arrow R in the drawing) is applied.
For this reason, in order to restrict the clockwise movement beyond the retracted position of the movable portion 300 (teleconverter lens 30), an abutting member 41 (second limiting portion) fixed to the inner cylinder 29 is provided. There is. The contact member 41 is an L-shaped bracket, and when the movable portion 300 (teleconverter lens 30) reaches the retracted position, contacts the cylindrical portion 35, and the timepiece is at least the retracted position of the movable portion 300 (teleconverter lens 30). Prevent rotation around.

Although the first limiting portion is the contact wall portion 40 fixed to the inner cylinder 29, and the second limiting portion is the contact member 41 which is an L-shaped metal fitting, the material and the shape as the limiting portion are the same. Not as long. Further, the first limiting portion and the second limiting portion may be used as separate members. In the present embodiment, the abutting member 41 abuts on the first restricting portion and the second restricting portion, but two abutting members are provided to abut on the first restricting portion and the second restricting portion, respectively. It is also possible to let

Where the roller holding portion 34 is provided, it is preferable that the distance from the rotation axis A4 be large so that the force with which the cylindrical portion 35 is pressed against the contact wall 40 and the contact member 41 by the spring member 36 is small.

The center of the movable unit 300 is positioned on the optical axis OA of the lens barrel 2 with the movable unit 300 (teleconverter lens 30) in FIG. Here, the center of the movable portion 300 in the present embodiment substantially coincides with the central axis of the annular frame 32 and the optical axis of the teleconverter lens 30, but this is not the case depending on the members included in the movable portion 300. In this embodiment, since the teleconverter lens 30 of the movable portion 300 is included, it is preferable in terms of optical performance that the center of the movable portion 300 substantially coincides with the optical axes OA of other lenses included in the lens barrel 2 at the mounting position. . The center of the movable unit 300 may not be located on the optical axis OA at the mounting position depending on the members included in the movable unit 300.
Further, the center of gravity of the movable portion 300 in the present embodiment substantially coincides with the center of gravity of the teleconverter lens 30, and also substantially coincides with the center of gravity of a member combining the annular frame 32 and the teleconverter lens 30. .

Furthermore, the movable portion 300 (tele converter lens 30) in FIG. 4C may be at a position not blocking the light beam in the lens barrel 2 when the movable portion 300 (tele converter lens 30) is at the retracted position. Is preferred. That is, the positional accuracy when the movable unit 300 (teleconverter lens 30) is in the retracted position may be lower than the positional accuracy when the movable unit 300 (teleconverter lens 30) is in the mounting position. Further, when the teleconverter lens 30 is at the retracted position, it is preferable to be on the semicircle side on the optical axis OA side on the outer periphery of the frame 31.

The cylindrical portion 35 is rotatable relative to the roller holding portion 34. Therefore, when the cylindrical portion 35 abuts on the abutting wall portion 40 or the abutting member 41, the same portion does not always abut on, and the abutting portion is moved by the rotation of the cylindrical portion 35. Therefore, the wear is not concentrated to a part, and the durability of the cylindrical portion 35 is good.
In addition, since the cylindrical portion 35 is an elastic member, no collision noise is generated at the time of contact with the contact wall portion 40 and the contact member 41, and the noise reduction is excellent. In the present embodiment, the cylindrical portion 35 is made of an elastic member, but it may be changed as long as the collision noise can be reduced. The elastic member may be any of a flexible member, an impact absorbing member, and a sound absorbing member. In addition, the elastic member is provided on at least one of the contact wall portion 40 (first restriction portion), the contact member 41 (second restriction portion), and a member (in the present embodiment, the cylindrical portion 35) that contacts the restriction portion. Just do it.

(Gear section 50)
FIG. 5 is a view showing the gear portion 50, in which the gear portion cover 56 shown in FIGS. 2 and 3 is removed. The gear unit 50 transmits driving force to the movable unit 300 when the operation unit 21 is operated, and the operation unit connecting gear 51, the intermediate gear 52, the brush rotation gear 53, and the telecon rotation gear 54 , And a damper gear 55.
These gears are arranged in a row along the circumferential direction about the optical axis OA. However, the present invention is not limited to this. If the driving force can be transmitted, the rows are formed along the circumferential direction about the optical axis OA It does not have to be.

One end of a rotation portion 21 a of the operation portion 21 described later is attached to the rotation axis A 1 of the operation portion connection gear 51. A brush portion 61 described later is attached to a rotation axis A3 of the brush rotation gear 53. As described above, the tip of the second portion 33b of the arm 33 is attached to the rotation axis A4 of the telecon rotation gear 54. The damper gear 55 is, for example, a gear whose rotational speed is limited by viscous oil, and reduces the rotational speed of the telecon rotational gear 54.

(Operation part 21)
Referring back to FIGS. 1, 2 and 3, the operation unit 21 is attached to the rear side of the accommodation unit 22. The operation unit 21 is L-shaped, and includes a rotating unit 21a extending in a direction perpendicular to the optical axis OA and an extending unit 21b extending in the optical axis OA direction.
One end of the rotating portion 21a is attached to the rotation axis A1 of the operation portion connecting gear 51 of the gear portion 50 described above, and can be rotated (rocked) around the rotation axis A1.
The extending portion 21b extends from the other end side of the rotating portion 21a to the front side in the optical axis OA direction on the outside of the exterior cylinder 26a. The exterior cylinder 26a is provided with a slit opened in a predetermined range in the circumferential direction, and the extension portion 21b extends to the outside of the exterior cylinder 26a through the slit.

When the photographer moves the extension part 21b of the operation part 21 from the outside of the exterior cylinder 26a along the slit in the circumferential direction of the exterior cylinder 26a, the rotating part 21a rotates around the rotation axis A1.
Then, the operation unit connection gear 51 is rotated, and the rotation rotates the telecon rotation gear 54 with many teeth via the intermediate gear 52 and the brush rotation gear 53. When the telecon rotation gear 54 rotates, the arm unit 33 also rotates. By rotation of the arm unit 33, the movable unit 300 (teleconverter lens 30) moves between the mounting position and the retracted position. At this time, the center of the movable portion 300 rotates in the direction of the arrow R in FIG.

As described above, the operation unit 21 is connected to the telecon rotation gear 54 with many teeth via the operation unit connection gear 51, the intermediate gear 52, and the brush rotation gear 53. Therefore, even if the force for driving the operation unit 21 is small, the movable unit 300 (teleconverter lens 30), which requires a large force for driving, can be rotated through these gear units.

A stopper 28 is provided between the extending portion 21 b in the mounting position and the extending portion 21 b in the retracted position. The stopper 28 can slide relative to the outer cylinder 26a, and when it slides forward in the direction of the optical axis OA, the extension portion 21b can move between the mounting position and the retracted position, and when it slides backward in the direction of the optical axis OA. The movement of the extension portion 21b between the mounting position and the retracted position is prevented.

(Encoder)
FIG. 6 is a diagram for explaining an encoder (signal generating unit) that detects the mounting state of the movable unit 300 (tele converter lens 30). The encoder includes an FPC (flexible printed circuit board) 60 and a brush unit 61.
The FPC 60 is attached to the outer surface of the gear portion cover 56 that houses the gear portion 50. The brush portion 61 is attached to the rotation axis A3 of the brush rotation gear 53 and rotates with the rotation axis A3.

When the movable portion 300 (teleconverter lens 30) shown in FIG. 6C is at the retracted position, the brush portion 61 is not in contact with the wiring for the movable portion attachment / detachment signal of the FPC 60.
When the movable portion 300 (teleconverter lens 30) shown in FIG. 6A is in the mounting position, the brush portion 61 is in contact with the wiring for the movable portion attachment / detachment signal of the FPC 60.

It is the position of FIG. 6B that the contact state of the FPC 60 with the wiring for movable part attachment / detachment in the brush part 61 is switched.
That is, while the movable portion 300 (teleconverter lens 30) is moving between the mounting position and the retracted position, it is before reaching the mounting position or the retracted position, and the moving direction of the center of the movable portion 300 is from the upper side to the lower side. At the time of switching to, the contact state between the wiring for the movable portion attachment / detachment signal of the FPC 60 and the brush portion 61 is switched. Then, a signal indicating a change in the mounting state is sent to the control unit (not shown) provided in the lens barrel 2 and the camera body 3 via the FPC 60.

A control unit provided in at least one of the lens barrel 2 and the camera body 3 performs processing for calculating the lens position at the time of autofocusing, the shutter speed, the aperture, and the exposure. At the time of these calculations, since the presence or absence of the teleconverter function differs depending on whether the movable unit 300 (teleconverter lens 30) is in the mounting position or in the retracted position, different calculations are performed.

On the other hand, if the mounting signal is sent to the control unit when, for example, the movable unit 300 (teleconverter lens 30) reaches the mounting position or the retracted position, it takes time for calculation for photographing. A time lag occurs between switching the presence of the converter function and enabling shooting.
However, according to the present embodiment, the movable portion 300 (teleconverter lens 30) moves from the mounting position before the movable portion 300 (teleconverter lens 30) starts moving from the retracted position and reaches the mounting position. Before reaching the retracted position, a signal indicating a change in the mounting state is sent to the control unit via the FPC 60. Therefore, the arithmetic processing can be started at the timing before the end of the position switching of the movable portion 300 (tele converter lens 30), and when the movable portion 300 (tele converter lens 30) reaches the mounting position or the retracted position Processing is complete, and shooting can be started immediately.
In the present embodiment, the timing at which the contact state is switched is when the moving direction of the center of the movable portion 300 is switched from the upper side to the lower side, but it is not limited to this. The timing at which the contact state is switched may be any time before the movable unit 300 (tele converter lens 30) reaches the mounting position or the retracted position, and is appropriately changed depending on the time required to transmit to the control unit or the arithmetic processing in the control unit It is possible.

(In case of horizontal position)
Returning to FIG. 4, the arrow G in the drawing indicates the direction of gravity applied to the center of the movable unit 300 when the camera 1 is in the horizontal position.
An arrow R is a movement trajectory of the center of the movable unit 300. When the movable unit 300 (teleconverter lens 30) moves between the mounting position and the retracted position, the position in the vertical direction (vertical direction) of the center of the movable unit 300 moves upward as shown by the arrow R. And, after exceeding the highest point shown in FIG. 4 (b), move downward. The arrow R extends in the circumferential direction around the rotation axis A4.
That is, the movement trajectory of the center of the movable unit 300 is U-turn in the vertical direction. Therefore, when the camera 1 is in the horizontal position, the movable portion 300 (tele converter lens 30) is prevented from stopping halfway during switching, and the movable portion 300 (tele converter lens 30) is at either the mounting position or the retracted position. Moving.

In the state shown in FIG. 4B, the vertical position of the center of the movable unit 300 is at the highest position. In this state, the first mounting portion 33c, the rotation axis A4, and the second mounting portion 33d of the spring member 36 are aligned on a straight line, and the spring member 36 is in a state of extending most from the retracted position to the mounting position.

From this state, when the teleconverter lens 30 moves from (b) to the mounting position side of (a), the spring member 36 is on the inner diameter side of the rotation axis A4. Then, since the biasing force is applied to the spring member 36 in the contracting direction, the spring member 36 biases the movable portion 300 (teleconverter lens 30) toward the mounting position.
That is, in addition to the above-described gravity, the spring force of the spring member 36 also biases the movable portion 300 (teleconverter lens 30) toward the mounting position.

In addition, when the movable portion 300 (teleconverter lens 30) moves from (b) to the retracted position side of (c), the spring member 36 is on the outer diameter side of the rotation axis A4. Then, since the biasing force is applied to the spring member 36 in the contracting direction, the spring member 36 biases the movable portion 300 (teleconverter lens 30) toward the retracted position.
That is, in addition to the above-described gravity, the spring force of the spring member 36 also biases the movable portion 300 (teleconverter lens 30) toward the retracted position.

As described above, in the horizontal position, the movable unit 300 (teleconverter lens 30) is at the highest position, regardless of whether the movable unit 300 (teleconverter lens 30) is in the mounting position or the retracted position. According to gravity, a force is applied in the downward direction, and a tensile force is also applied in the same direction by the spring force. Therefore, the force for moving the operation unit 21 by the photographer is almost unnecessary in the latter half of the movement, and hence the operation is easy. In particular, operability when the movable portion 300 (teleconverter lens 30) is heavy is improved.

Furthermore, at the mounting position shown in FIG. 4A and the retracted position shown in FIG. 4C, the spring force and the gravity are applied to the movable portion 300 (teleconverter lens 30) in substantially the same direction. Therefore, the movable portion 300 (teleconverter lens 30) becomes difficult to move from the mounting position or the retracted position, and is held more stably.

(For vertical position)
FIG. 7 shows the direction of gravity applied to the movable portion 300 when the camera 1 is at the vertical position inclined 90 degrees from the horizontal position shown in FIG.
Even in the vertical position, when the movable portion 300 (tele converter lens 30) moves from (b) to the mounting position side of (a), the spring force of the spring member 36 moves the movable portion 300 (tele converter lens 30) Is biased to move to the mounting position.
Then, a force is applied to the center of the movable portion 300 also by gravity so as to move to the mounting position side.
Therefore, even when the camera 1 is in the vertical position, after the maximum value of the spring force is exceeded, the movable portion 300 (teleconverter lens 30) moves to the mounting position side.
Then, in the mounting position, the spring force and the gravity are applied to the movable portion 300 in substantially the same direction. Therefore, the movable portion 300 (teleconverter lens 30) is difficult to move from the mounting position, and is more stably held at the mounting position.

Also in the vertical position, when the movable portion 300 (tele converter lens 30) moves from (b) to (c), the movable portion 300 (tele converter lens 30) is retracted by the spring force of the spring member 36. Energized to move to position.
At this time, although the spring force of the spring member 36 is in a direction against gravity, the teleconverter lens 30 is moved to the retracted position by selecting the spring force to be stronger than the gravity.
Therefore, also when the camera 1 is in the vertical position, after the maximum value of the spring force is exceeded, the movable portion 300 (teleconverter lens 30) moves to the retracted position side.
Then, in the retracted position, the spring force applied to the movable portion 300 (tele converter lens 30) and the gravity are on the opposite side, so the stability is worse than the mounting position, but the movable portion 300 (tele converter lens 30) In the case of the retracted position, there is little adverse effect since it does not affect the shooting.

Further, according to the embodiment, at least a portion of the operation portion 21, at least a portion of the gear portion 50, and at least a portion of the teleconverter lens 30 in the retracted state are disposed on the same straight line along the optical axis OA. ing.
Then, on the rear side of the accommodation portion 22 accommodating the movable portion 300 (teleconverter lens 30) in the retracted state, the extension portion 21b of the operation portion 21 extending outside the exterior cylinder 26a is disposed. That is, the storage unit 22 is disposed closer to the subject than the operation unit 21.
The extension portion 21 b is located radially inward of the housing portion 22 in the optical axis OA. Therefore, even if something comes in contact with the lens barrel 2 from the outside, the accommodation portion 22 comes in contact with the extension portion 21b earlier, so the possibility of the operation portion 21 malfunctioning is small.

As described above, the lens strap 27 is attached to the front strap mounting portion 23 of the accommodation portion 22. However, since the accommodation portion 22 is provided, the lens strap 27 is mistakenly caught on the extension portion 21b. As a result, the operation unit 21 is not erroneously operated.

According to the present embodiment, the operation unit 21 and the storage unit 22 are provided on the right side of the lens barrel 2. That is, the operation unit 21 is disposed at a position closer to the lateral position holding hand 5a than the optical axis OA.
FIG. 8 is a diagram showing an operation state of the camera 1. When the photographer holds the camera 1 in the lateral position, the photographer generally holds the lateral position holding hand 5a with the right hand RH. Then, the tip of the index finger is placed on the horizontal release button 7a. At this time, while the tip of the lens barrel 2 is supported by the left hand LH, the focus ring 24 and the zoom ring 25 are operated.
According to the embodiment, the operation unit 21 is disposed on the right hand RH side holding the lateral position holding hand 5 a.
Furthermore, when the lens barrel 2 is attached to the camera body 3, the operation unit 21 is closer to the lateral position holding portion 5a for the photographer to hold at the time of lateral position imaging than the optical axis OA. Placed in position. That is, in a state in which the lateral position holding portion 5a is gripped by the right hand RH, it is disposed in the range where the middle finger and ring finger can reach.
Therefore, at the time of shooting, the photographer can switch the presence or absence of the function of the teleconverter lens 30 while looking through the finder 6 and pressing the release button 7a. That is, since the presence or absence of the function of the teleconverter lens 30 can be switched without changing the posture from the normal photographing state, operability is good.

In particular, when the lens barrel 2 is heavy, the left hand LH often operates the focus ring 24 or the zoom ring 25 while supporting the tip of the lens barrel 2. Assuming that the operation unit 21 is disposed on the left hand LH side, it is necessary to operate the operation unit 21 by separating the left hand LH from the lens barrel 2 or shifting the support position to the operation unit 21 position. . Then, the lens barrel 2 with the left hand LH can not be held or stabilized, and the operability is poor.

(Modified form)
As mentioned above, although a suitable embodiment was described, the present invention is not limited by the above-mentioned embodiment. For example, the following modifications are possible.
(1) In the present embodiment, the teleconverter lens 30 is attached and detached by the L-shaped lever-like operation unit 21. However, for example, a push button may be used.
(2) Further, in the embodiment, the gear unit 50 is used for power transmission between the operation unit 21 and the movable unit 300 (teleconverter lens 30), but not limited to the gear unit 50, in the middle of transmission of switching. A motor may be arranged.
(3) In the embodiment, the member including the teleconverter lens 30 as the movable portion has been described. However, the present invention is not limited to this. For example, the movable portion may move when the lens barrel length of the lens barrel decreases. It may be a member including a part of lenses, may be a member including a lens used for switching the focal length in a bifocal lens, and may not include a lens in the movable part.
(4) In the embodiment, the switching detection is performed by the FPC 60 as the encoder and the brush unit 61. However, the present invention is not limited to this. For example, a button is provided on one side and the other is detected on the other side. Such other structures may be used. In the embodiment, the brush is at the root of the operation unit 21 and the encoder is on the side of the gear unit, but the present invention is not limited to this.
(5) In the embodiment, the operation unit 21 is configured to be driven manually. However, the present invention is not limited to this, and may be configured to move electrically when the switch is turned on.

A1: rotation axis, A3: rotation axis, A4: rotation axis, BM: body mount, L: lens, LM: lens mount, OA: light axis, 1: camera, 2: lens barrel, 3: camera body, 4 : Image sensor 5a: Handle for horizontal position, 5b: Handle for vertical position, 6: Finder, 7: Release button, 7a: Release button for horizontal position, 7b: Release button for vertical position, 21: Operation section, 21a: rotating portion, 21b: extending portion, 22: housing portion, 23: strap mounting portion, 24: focus ring, 25: zoom ring, 26a, 26b: armor cylinder, 27: strap, 28: stopper, 29: inside Cylinder, 29a: Fixed part, 30: Teleconverter lens, 31: Frame, 32: Ring frame, 33: Arm part, 33a: First part, 33b: Second part, 33c: First attachment part, 33d: Second installation Parts, 34: Roller holding parts, 35: Cylindrical parts, 36: Spring members, 40: Abutment wall parts, 41: Abutment members, 50: Gear parts, 51: Operation part connecting gear, 52: Second gear, 53 : Third gear, 54: Telecon rotating gear, 55: Damper gear, 56: Gear part cover, 61: Brush part, 300: Movable part

Claims

A lens barrel that can be attached to the camera body,
An imaging optical system disposed along the optical axis,
And a movable portion movable between the mounting position on the optical axis and the retracted position retracted from the optical axis,
The lens barrel, wherein the movement trajectory of the movable portion is convex.
At least a part of the lens barrel is disposed outside the lens barrel, and a user operates the movement of the movable portion by a user.
The lens mirror according to claim 1, wherein the movement locus of the movable part is convex in a direction opposite to the movement direction of the operation part when moving the movable part from the retracted position to the mounting position. Tube.
The movable portion pivots between the mounting position and the retracted position;
The movement trajectory of the movable portion is convex in a direction away from the center of rotation.
The lens barrel according to claim 1.
When the lens barrel is mounted on the camera body and the camera body is in the horizontal position, the moving locus of the movable portion is convex upward.
The lens barrel according to any one of claims 1 to 3.
A lens barrel that can be attached to the camera body,
An imaging optical system disposed along the optical axis,
And a movable portion movable between the mounting position on the optical axis and the retracted position retracted from the optical axis,
When the movable portion moves from the retracted position to the mounted position with the lens barrel mounted on the camera body and the camera body in the horizontal position or the vertical position, the center of the movable portion is Move down,
Lens barrel.
The horizontal position is
When the long side of the rectangular imaging element included in the camera body extends in the horizontal direction,
When the handle portion of the camera body is in the right lateral direction of the imaging device,
When a finder included in the camera body is in the upper direction of the imaging device, or when a tripod hole included in the camera body is in the lower direction of the imaging device,
When it meets at least one of
The lens barrel according to any one of claims 4 or 5.
The center of the movable portion is located on the optical axis when the movable portion is in the mounting position.
The lens barrel according to any one of claims 1 to 6.
An elastic member for biasing the movable portion;
The elastic member is
When the movable portion moves between the mounting position and the retracted position,
When the movable portion is closer to the mounting position than a predetermined position between the mounting position and the retracted position, the movable portion is biased toward the mounting position;
When the movable portion is closer to the retracted position than the predetermined position, the movable portion is biased toward the retracted position.
The lens barrel according to any one of claims 1 to 7.
A first restricting portion that restricts the movement of the movable portion in the opposite direction to the retracted position beyond the mounting position;
A second restricting portion that restricts the movement of the movable portion to the opposite side of the mounting position beyond the retracted position;
The lens barrel according to any one of claims 1 to 8, comprising at least one of the following.
And a cylindrical portion that contacts at least one of the first limiting portion or the second limiting portion when the movable portion is positioned at the mounting position or the retracted position,
Any one of the first limiting portion, the second limiting portion, or the cylindrical portion is an elastic member or a flexible member,
The cylindrical portion is rotatably fixed to the movable portion, and an outer peripheral surface abuts on the first limiting portion or the second limiting portion.
The lens barrel according to claim 9.
The signal generation unit is configured to generate a signal when the moving direction of the movable unit switches from the upper side to the lower side.
The lens barrel according to any one of claims 1 to 10.
A lens barrel that can be attached to the camera body,
An imaging optical system disposed along the optical axis,
A movable portion movable between the mounting position on the optical axis and the retracted position retracted from the optical axis;
A signal generation unit that detects a change in the mounting state of the movable unit before reaching the mounting position or the retracted position during movement of the movable unit between the mounting position and the retracted position;
Lens barrel equipped with
The movable part comprises a teleconverter lens,
The lens barrel according to any one of claims 1 to 12.
A camera comprising the lens barrel according to any one of claims 1 to 13 and the camera body.
The lens barrel is attachable to and detachable from the camera body.
The lens barrel according to any one of claims 1 to 13.