WO2019131187A1 - Barillet de l'objectif et appareil photo - Google Patents

Barillet de l'objectif et appareil photo Download PDF

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Publication number
WO2019131187A1
WO2019131187A1 PCT/JP2018/045949 JP2018045949W WO2019131187A1 WO 2019131187 A1 WO2019131187 A1 WO 2019131187A1 JP 2018045949 W JP2018045949 W JP 2018045949W WO 2019131187 A1 WO2019131187 A1 WO 2019131187A1
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WO
WIPO (PCT)
Prior art keywords
lens barrel
movable
optical axis
unit
lens
Prior art date
Application number
PCT/JP2018/045949
Other languages
English (en)
Japanese (ja)
Inventor
一郎 今榮
Original Assignee
株式会社ニコン
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社ニコン filed Critical 株式会社ニコン
Priority to JP2019562981A priority Critical patent/JP7099477B2/ja
Publication of WO2019131187A1 publication Critical patent/WO2019131187A1/fr

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
    • G03B17/14—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets interchangeably

Definitions

  • the present invention relates to a lens barrel and a camera.
  • 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.
  • 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
  • a movable portion movable between the retracted positions, an operation portion at least a part of which is disposed outside the lens barrel to operate the movement of the movable portion, and a driving force from the operation portion to the movable portion
  • a transmission unit configured to transmit a lens barrel.
  • the lens barrel of the second aspect is a lens barrel that can be mounted on a camera body having a handle for a photographer to hold during lateral position shooting, and is arranged along the optical axis.
  • a photographing optical system disposed, a movable portion movable between a mounting position on the optical axis, and a retracted position retracted from the optical axis, and an operation portion for operating the movement of the movable portion
  • the operation unit may be disposed at a position closer to the holding portion than the optical axis when the lens barrel is mounted on the camera body.
  • the camera according to the third aspect is configured to include the lens barrel.
  • 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.
  • FIG. 1 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.
  • 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.
  • 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.
  • 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.
  • 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,
  • 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
  • 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
  • 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
  • the tripod hole (not shown) provided in the camera body 3 is in the lower direction of the imaging device 4
  • 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.
  • 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).
  • 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.
  • 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.
  • 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.
  • a body mount BM is provided at the front center of the camera body 3.
  • 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.
  • an imaging optical system including a plurality of lens groups.
  • FIG. 1 only the frontmost lens L is shown.
  • 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.
  • 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.
  • FIG. 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.
  • the movable portion 300 includes a teleconverter lens 30 and a frame 31 covering the outer periphery of the teleconverter 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.
  • 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.
  • 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.
  • 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.
  • the movable part 300 rotates (rock) about the rotation axis A4.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the first limiting portion is the contact wall portion 40 fixed to the inner cylinder 29
  • 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.
  • the first limiting portion and the second limiting portion may be used as separate members.
  • 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
  • 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.
  • 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.
  • 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. .
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the brush portion 61 is not in contact with the wiring for the movable portion attachment / detachment signal of the FPC 60.
  • 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.
  • 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.
  • 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.
  • 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.
  • a signal indicating a change in the mounting state is sent to the control unit via the FPC 60.
  • 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.
  • 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.
  • 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.
  • the vertical position of the center of the movable unit 300 is at the highest position.
  • 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.
  • 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.
  • 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.
  • 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.
  • operability when the movable portion 300 (teleconverter lens 30) is heavy is improved.
  • 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.
  • 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.
  • 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.
  • 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.
  • the movable portion 300 (teleconverter lens 30) is difficult to move from the mounting position, and is more stably held at the mounting position.
  • 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.
  • 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.
  • 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.
  • the lens strap 27 is attached to the front strap mounting portion 23 of the accommodation portion 22.
  • the accommodation portion 22 is provided, the lens strap 27 is mistakenly caught on the extension portion 21b.
  • the operation unit 21 is not erroneously operated.
  • 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.
  • 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.
  • the left hand LH 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.
  • the present invention is not limited by the above-mentioned embodiment.
  • the teleconverter lens 30 is attached and detached by the L-shaped lever-like operation unit 21.
  • a push button may be used.
  • 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.
  • the member including the teleconverter lens 30 as the movable portion has been described. However, the present invention is not limited to this.
  • 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.
  • the switching detection is performed by the FPC 60 as the encoder and the brush unit 61.
  • the present invention is not limited to this.
  • a button is provided on one side and the other is detected on the other side.
  • 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.
  • 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.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Structure And Mechanism Of Cameras (AREA)
  • Lens Barrels (AREA)

Abstract

L'invention concerne un barillet de l'objectif et un appareil photographique qui possèdent une fonctionnalité améliorée pour l'insertion et le retrait d'une section mobile. Le barillet de l'objectif 2 peut être fixé sur un corps d'appareil photographique 3 et comprend : un système optique d'imagerie disposé le long d'un axe optique OA ; une section mobile 300 qui est mobile entre une position de fixation sur l'axe optique OA et une position rétractée, rétractée à partir de l'axe optique OA ; une section d'actionnement 21 dont au moins une partie est disposée à l'extérieur du barillet de l'objectif 2 et actionne le déplacement de la section mobile 300 ; et une section de transmission 50 qui transmet une force d'entraînement pour déplacer la section mobile 300 lorsque la section d'actionnement 21 est actionnée.
PCT/JP2018/045949 2017-12-27 2018-12-13 Barillet de l'objectif et appareil photo WO2019131187A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2019562981A JP7099477B2 (ja) 2017-12-27 2018-12-13 レンズ鏡筒及びカメラ

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JP2017-251503 2017-12-27
JP2017251503 2017-12-27

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WO2019131187A1 true WO2019131187A1 (fr) 2019-07-04

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Citations (5)

* Cited by examiner, † Cited by third party
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JPS6319639A (ja) * 1986-07-14 1988-01-27 Nikon Corp フイルタ−の挿脱装置
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