JP6140982B2 - Lens barrel and optical apparatus equipped with the same - Google Patents

Description

  The present invention relates to a lens barrel and an optical apparatus including the same, and is particularly suitable for an optical apparatus including a switchable slide switch, such as a single-lens reflex camera, a compact camera, a TV camera, and a liquid crystal projector.

  2. Description of the Related Art Conventionally, many photographing lens barrels are provided with a switching operation member on the exterior of a lens barrel that can select whether a function related to lens operation (autofocus, camera shake correction, etc.) is valid or invalid.

  For example, in Patent Document 1, the click member has a moving member engaging portion fixed inside the fixed ring with respect to the moving member inserted into the hole of the fixed ring. Further, the switch member has an operated end capable of switching the operation state, and the click member has a switch engaging portion that drives the operated end. Furthermore, a click member has a click part which produces a click feeling when moving by contacting a stationary ring or another member. And it is disclosed that the moving member engaging part of a click member is arrange | positioned between a switch engaging part and a click part in the moving direction of a click member.

  The moving member fixed integrally with the click member is often arranged behind the at least one operation ring in the optical axis direction, and the moving direction of the click member is often the optical axis direction. Since the configuration of Patent Document 1 requires a space in the movement direction of the click member, the click member is disposed rearward in the optical axis direction from at least one operation ring, and is suitable for a lens in which the click member moves in the optical axis direction. Absent.

  Then, patent document 2 is mentioned as a space-saving structure in the moving direction of a click member. Patent Document 2 discloses a configuration in which the click portion and the switch engagement portion of the slide member are not on the same line as the movement member engagement portion in the movement direction.

JP 2007-87933 A JP 2008-41439 A

  However, in the prior art disclosed in Patent Document 2 described above, the width of the hole of the stationary ring and the width of the moving member inserted into the hole are fitted to guide the moving member and the click member in the moving direction. The click part of the click member is not collinear with the moving member engaging part. In addition, in order to reduce the size of the moving member, the hole of the fixed ring and the fitting portion of the moving member inserted into this hole are made the minimum size, and the fitting length of the fixed ring and the moving member is It is getting shorter. Therefore, the click member generates a moment centering on the moving part engaging portion and the click portion as an arm, and the moving member attached integrally vibrates in the gap of the fitting portion and appears to swing from the outside. End up.

  An object of the present invention is to provide a lens barrel that includes a click member that can be configured in a space-saving manner in the moving direction and that can suppress a shake in a gap of a fitting portion, and an optical apparatus using the lens barrel. There is.

In order to achieve the above object, a lens barrel according to the present invention is a lens barrel including a moving lens group that moves in an optical axis direction, and includes an operation ring that moves the moving lens group, and an operation ring. A stationary ring fixed to the stationary ring, an outer periphery of the stationary ring or a stationary member integrally attached to the stationary ring, a movable member movable in the optical axis direction , an operated end, A switch member having an internal contact that is switched in conjunction with the operated end that is moved by the movement of the moving member; and engages with the moving member so as to move integrally with the moving member in the optical axis direction. a first engagement portion which is, first the second engagement portion engaged with the object to be controlled element, to generate a click feeling by the relative movement between the step portion provided in the fixing ring or the fixing member 3 engaging parts and front Engaged in the guide groove having a fixed ring or said stationary member, said fourth engagement portion that is configured to move in the optical axis direction, and the click member including, and wherein the first The engaging portion and the fourth engaging portion are arranged on one straight line parallel to the optical axis direction .

  An optical device having the lens barrel, the fixed lens group, and the moving lens group also constitutes another aspect of the present invention.

  According to the present invention, it is possible to provide a lens barrel mounted with a click member that can be configured in a space-saving manner in the moving direction and that can suppress a shake in the gap of the fitting portion, and an optical apparatus using the lens barrel. be able to.

It is a perspective view which shows the click spring as a click member in the lens barrel which concerns on the 1st Embodiment of this invention. It is a disassembled perspective view which shows the click spring in the lens barrel which concerns on 1st Embodiment. (A), (b) is an external view of the interchangeable lens barrel for cameras carrying the click spring which concerns on embodiment of this invention. It is sectional drawing which shows the guide part of the click spring in the lens barrel which concerns on 1st Embodiment. It is a perspective view which shows the click spring as a click member in the lens barrel which concerns on the 2nd Embodiment of this invention. It is a disassembled perspective view which shows the click spring in the lens-barrel which concerns on 2nd Embodiment. It is sectional drawing which shows the urging | biasing part of the click spring in the lens barrel which concerns on 2nd Embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<< First Embodiment >>
Hereinafter, with reference to FIGS. 1 to 4, a lens barrel according to a first embodiment of the present invention on which a click spring 4 as a click member is mounted and an optical apparatus using the same will be described. Here, as an optical apparatus, a single-lens reflex camera, a compact camera, a TV camera, a liquid crystal projector, etc. correspond.

  FIGS. 3A and 3B are external views of a lens barrel including a fixed lens group and a moving lens group. The lens barrel is provided with an exterior ring 1 as a fixed ring that covers the periphery of a plurality of lens groups, a manual focus ring 5 as a plurality of operation rings that rotate at a fixed position with respect to the exterior ring 1, and a manual zoom ring 6. . The rotational movement of the manual focus ring 5 is converted into movement in the optical axis direction, and a focus lens which is a moving lens group (not shown) moves in the optical axis direction.

  Similarly, the rotational movement of the manual zoom ring 6 is converted into movement in the optical axis direction, and a zoom lens which is a moving lens group (not shown) moves in the optical axis direction. Such a lens barrel is attached to a single-lens reflex camera or the like whose lens can be exchanged via a mount 7. On the outer periphery of the outer ring 1, a slide portion 2 is provided as a moving member that is manually operated in the optical axis direction of the lens at a position behind either the manual focus ring 5 or the manual zoom ring 6. .

  FIG. 1 is a perspective view showing the inside view of the lens barrel of the present embodiment, and FIG. 2 is an exploded perspective view of a switching operation mechanism attached thereto. A through hole 1a is provided in the exterior ring 1 that is a fixed ring, and the exterior ring engagement portion 2a of the slide portion 2 that is a moving member is engaged while being inserted from the outside to the inside.

  On the lower surface of the changeover switch 3 as a switch member fixed to the outer ring 1, an operated end 3 a interlocking with the internal contact is provided, and the operated end 3 a is used as the slide portion 2 and a click member integrated with the slide portion 2. The click spring 4 is switched in the optical axis direction. An electrical contact piece 3b is provided on the upper surface of the changeover switch 3, and a flexible printed circuit board 9 is provided in contact with the rear surface of the changeover switch 3. A conductor of the flexible printed circuit board is connected to the electrical contact piece 3b of the changeover switch 3. ing.

  The click spring 4 has a slide portion engagement portion 4a (first engagement portion) that engages with the outer ring engagement portion 2a of the slide portion 2 and the inside of the lens barrel. The part engaging part 4 a is attached to the exterior ring engaging part 2 a of the slide part 2. Further, the click spring 4 enters the switch operating portion 4b (second engaging portion) that engages with the operated end 3a provided on the lower surface of the changeover switch 3 and the click groove 1c of the exterior ring 1 to enter the click feeling ( A click portion 4c (third engagement portion) for generating a response is provided.

  Further, as will be described in detail later, the click spring 4 has an exterior ring guide portion 4d (fourth engagement) as an engagement portion that engages with the guide groove 1b of the exterior ring 1 in a direction orthogonal to the optical axis direction. Part). Here, FIG. 4 shows a cross-sectional view of the guide groove 1 b of the outer ring 1 and the outer ring guide part 4 d of the click spring 4. The optical axis direction in FIG. 4 is a direction orthogonal to the paper surface.

  With such a configuration, when the slide part 2 is moved by a predetermined dimension in the optical axis direction of the lens barrel, the click spring 4 integrally attached to the slide part 2 moves by a predetermined dimension in the optical axis direction. Since the slide portion 2 is disposed between the manual focus ring 5 and the manual zoom ring 6 or between the manual focus ring 5 or the manual zoom ring 6 and the mount 7, it is desired to make the slide unit 2 compact in the optical axis direction. Therefore, the click portion 4c of the click spring 4 is arranged at a position offset from the slide spring engaging portion 4a of the click spring in the optical axis direction, not on the same line.

  Here, due to the spring force of the click portion 4c, a moment is generated with the click portion 4c as an arm around the slide portion engaging portion 4a. In order to suppress the swing of the slide portion 2 due to the moment, the guide groove of the outer ring 1 is collinear with the hole 1a of the outer ring 1 engaged and the outer ring engagement portion 2a of the slide portion 2 in the optical axis direction. An exterior ring guide portion 4d of the click spring 4 is engaged with 1b in a direction orthogonal to the optical axis direction.

  In this way, in a configuration that saves space in the optical axis direction, by having the engaging portions 4a and 4d at two positions apart on the same line in the optical axis direction, the rotation of the slide portion 2 due to shaking within the engaging backlash is achieved. The angle can be reduced and the shake can be suppressed. Thereby, the subject that the slide part 2 which is a moving member shakes from the outside with the conventional shake is solved.

<< Second Embodiment >>
Hereinafter, a lens barrel equipped with a click spring as a click member according to a second embodiment of the present invention will be described with reference to FIGS. In the first embodiment, the configuration in which the guide groove of the outer ring and the guide part of the click spring engage with each other in the direction orthogonal to the moving direction of the slide part, which is a moving member, is shown in this embodiment. The structure which the urging | biasing part of the click spring is urging | biasing with respect to the at least 1 slope of a groove | channel is shown.

  FIG. 5 is a perspective view showing an inside view of the lens barrel of the present embodiment, and FIG. 6 is an exploded perspective view of a switching operation mechanism attached thereto. The outer ring 11 is provided with a through hole 11a, and the outer ring engaging portion 2a of the slide portion 2 is engaged while being inserted from the outside to the inside. An operated end 3a is provided on the lower surface of the changeover switch 3 fixed to the exterior ring 11, and the operated end 3a is switched in the optical axis direction. An electrical contact piece 3b is provided on the upper surface of the changeover switch 3, and a flexible printed circuit board 9 is provided in contact with the rear surface of the changeover switch 3. A conductor of the flexible printed circuit board is connected to the electrical contact piece 3b of the changeover switch 3. ing.

  The click spring 14 has an outer ring engagement portion 2 a of the slide portion 2 and a slide portion engagement portion 14 a (first engagement portion) that engages inside the lens barrel, and a slide portion of the click spring 4 with a screw 8. The engaging portion 14 a is attached to the exterior ring engaging portion 2 a of the slide portion 2. Further, the click spring 14 enters the switch operating portion 14 b (second engaging portion) that engages with the operated end 3 a provided on the lower surface of the changeover switch 3 and the click groove 11 c of the outer ring 11 to feel a click. A click portion 14c (third engagement portion) to be generated is provided.

  In addition, the guide groove 11b of the outer ring 11 has one of the surfaces facing in the direction orthogonal to the optical axis direction, and the click spring 14 is biased toward the right angle surface while being urged against the inclined surface of the guide groove 11b. The outer ring urging portion 14d (fourth engaging portion) is provided as the engaging portion. FIG. 7 shows a cross-sectional view of the guide groove 11b of the outer ring 11 and the outer ring biasing portion 14d of the click spring 14. The optical axis direction in FIG. 7 is a direction orthogonal to the paper surface.

  With such a configuration, the slide part 2 is moved by a predetermined dimension in the optical axis direction of the lens barrel, and the click spring 14 integrally attached to the slide part 2 is also moved by a predetermined dimension in the optical axis direction. The slide unit 2 is disposed between the manual focus ring 5 and the manual zoom ring 6 that are a plurality of operation rings, or between the manual focus ring 5 or the manual zoom ring 6 that is an operation ring and the mount 7. That is, the slide part 2 is arranged behind (at the object side or the side opposite to the incident side) in the optical axis direction from at least one operation ring.

  To achieve compactness in the optical axis direction under the configuration in which the slide portion engaging portion 14a (first engaging portion) and the exterior ring biasing portion 14d (fourth engaging portion) are arranged in the optical axis direction. The click portion 14c (third engagement portion) of the click spring 14 is arranged as follows. That is, the click spring slide portion engaging portion 14a (first engaging portion) is arranged not at the same line as the optical axis direction but at an offset position.

  Here, due to the spring force of the click portion 14c, a moment is generated with the click portion 14c as an arm around the slide portion engaging portion 14a. At this time, in order to suppress the swing of the slide portion 2 due to the moment, the outer ring biasing is collinear with the holes 11a of the outer ring 11 and the outer ring engagement portion 2a of the slide portion 2 in the optical axis direction. The portion 14d is provided as a fourth engagement portion.

  That is, the exterior ring biasing portion 14 d of the click spring 14 engages with the guide groove 11 b of the exterior ring 1 in a direction orthogonal to the optical axis direction. In this way, in a configuration that saves space in the optical axis direction, slides are provided by having engaging portions (a first engaging portion and a fourth engaging portion) at two locations separated on the same line in the optical axis direction. The rotation angle due to the shake within the engagement play of the portion 2 is reduced to suppress the shake.

  In the present embodiment, one of the guide grooves 11b of the outer ring 1 is a slope and the other is a right-angle face, but both may be slopes.

(Modification)
As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

(Modification 1)
Instead of attaching to the exterior ring which is a stationary ring, a fixing member integrally attached to the exterior ring may be provided with a hole, a guide groove and a click groove. Further, the lens barrel is not replaceable, and may be integrally attached to the photographing device or the like. Further, the optical device may be a single lens reflex camera, a compact camera, a TV camera, or the like that includes the lens barrel and the photographing optical system described above, or a liquid crystal projector that includes the lens barrel and the projection optical system described above.

(Modification 2)
In the above-described embodiment, the click parts (third engagement parts) 4c and 14c are engaged with the click groove 1c of the exterior ring 1 that is a fixed ring. A protrusion may be provided instead of the groove.

(Modification 3)
In the above-described embodiment, the direction connecting the first engaging portion (4a, 14a) and the third engaging portion (4c, 14c) is different from the moving direction of the slide portion 2 that is the moving member. However, the moving direction of the moving member may be used. Further, the moving direction of the moving member may be a direction different from the optical axis direction.

  1.11..Exterior ring (fixed ring) 2..Slide part (moving member) 3..Switch (switch member) 4,14..Click spring (click member) 4a, 14a..Slide Part engaging part (first engaging part), 4b, 14b, switch operating part (second engaging part), 4c, 14c, click part (third engaging part), 4d, 14d,・ Exterior ring guide (fourth engaging part)

Claims (6)

A lens barrel having a moving lens group that moves in the optical axis direction,
An operating ring for moving the moving lens group;
A stationary ring fixed to the operating ring;
A movable member that is disposed on an outer periphery of the stationary ring or a stationary member that is integrally attached to the stationary ring, and is movable in the optical axis direction ;
A switch member having an operated end and an internal contact that is switched in conjunction with the operated end that is moved by the movement of the moving member;
A first engaging portion engaged with the moving member so as to move integrally with the moving member in the optical axis direction; a second engaging portion engaged with the operated end; A third engagement portion that generates a click feeling by relative movement with a step portion provided on the fixed ring or the fixing member, and a guide groove that the fixed ring or the fixing member has, and is engaged in the optical axis direction. A click member including a fourth engagement portion configured to move to
Equipped with a,
The first engaging portion and the fourth engaging portion are disposed on one straight line parallel to the optical axis direction.
A lens barrel characterized by that. 2. The lens barrel according to claim 1 , wherein the first engaging portion and the third engaging portion are arranged at positions offset in a direction perpendicular to the optical axis direction. The fourth engagement portion is urged and engaged with at least one inclined surface of surfaces facing in a direction orthogonal to the optical axis direction provided on the stationary ring or the stationary member. The lens barrel according to claim 1 or 2 . The lens barrel according to any one of claims 1 to 3 , wherein the operation ring includes a manual focus ring and a manual zoom ring as a plurality of operation rings. The lens barrel is detachable from the camera body,
The moving member, a lens barrel according to any one of claims 1 to 4, characterized in that provided on the camera body side in the optical axis direction than the at least one of said operation ring. An optical apparatus comprising: the lens barrel according to any one of claims 1 to 5, a fixed lens group, and movable lens group, the.