JP2010078776A - Device for attaching/detaching interchangeable lens of optical instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the cost by making the configuration compact and simple and further the number of parts and the number of manufacturing man-hours small; to secure easy and excellent attachment and detachment operability when an interchangeable lens is attached and detached; and to improve durability and further reliability by reducing troubles such as failures by securing high support strength for the interchangeable lens. <P>SOLUTION: A device for attaching/detaching interchangeable lens provided with an attaching and detaching mechanism 2 for attaching and detaching the interchangeable lens L to and from an optical instrument body P includes an attaching and detaching support mechanism 3 which rotationally displaces the interchangeable lens L in an insertion position Xi, inserted into the optical instrument body P to a predetermined attachment position Xs by the operation of a first operation part 4 and rotationally displaces the interchangeable lens L in the attachment position Xs to the insertion position Xi by the operation of the first operation part 4 and a lock mechanism 5 which automatically locks the interchangeable lens L in the attachment position Xs, when the interchangeable lens L is rotationally displaced to the attachment position Xs and releases the lock by the pushing operation of a second operation part 6. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an interchangeable lens attaching / detaching device for an optical apparatus provided with an attaching / detaching mechanism for attaching / detaching an interchangeable lens to / from an optical apparatus main body.

  In general, a small camera that uses an interchangeable lens can easily hold the interchangeable lens with one hand. Therefore, when the interchangeable lens is attached to the camera body, the interchangeable lens is inserted into the lens mount portion of the camera body. Thereafter, when the interchangeable lens is rotated, the plurality of latching claws in the interchangeable lens are clickably latched on the lens mount portion side, so that the interchangeable lens can be easily attached and detached. However, since the interchangeable lens is considerably heavy in a large optical device, it is difficult to hold the interchangeable lens with one hand. Accordingly, the attachment / detachment of the interchangeable lens requires a great amount of labor, and problems such as dropping the interchangeable lens during attachment / detachment are likely to occur.

For this reason, conventionally, an interchangeable lens attaching / detaching device (lens attaching mechanism) for easily attaching / detaching a heavy interchangeable lens is also known, and Patent Document 1 discloses an outer periphery of a lens barrel in which a lens is disposed. A mirror having a cylindrical portion, a flange portion extending from the one end of the cylindrical portion in the outer diameter direction, and a protrusion protruding in the outer diameter direction from the other end of the cylindrical portion. The tube mounting member and the lens barrel are fixed to the apparatus main body to which the lens barrel is attached, and the cylindrical portion is formed on the inner peripheral surface of the hole portion with the cylindrical portion inserted from the other end side of the cylindrical portion. A base member having an opening end face of a hole for allowing a protrusion to be inserted and a hole for abutting the flange, and a pivotable arrangement sandwiched between the base members. A ring member having a recess that allows the portion to be inserted Rotate the groove of the base member and the concave portion of the ring member in the circumferential direction to insert the lens barrel into the hole until the flange of the lens barrel mounting member abuts the opening end surface, and then rotate the ring member. By moving and moving the recess in the circumferential direction with the groove, the projection is locked by the ring member and the lens barrel mounting member is fixed, so that the lens barrel is attached to the apparatus body, and the ring member is A lens mounting mechanism is disclosed that includes a lock mechanism that positions the groove and the recess in the circumferential direction and the position in which the groove and the recess are shifted in the circumferential direction.
JP 2004-133358 A

  However, the conventional interchangeable lens attaching / detaching device (lens mounting mechanism) disclosed in Patent Document 1 described above has the following problems.

  First, the entire configuration of the lens mounting mechanism including the lock mechanism becomes complicated, and a wide arrangement space for the lens mounting mechanism is taken. Therefore, the overall size and complexity of the optical apparatus are increased, and the cost increases which cannot be ignored due to the increase in the number of parts and the number of manufacturing steps, and it is difficult to ensure easy and good detachability when attaching / detaching the interchangeable lens.

  Secondly, in a large optical device, since a heavy interchangeable lens is attached and detached, a high mounting strength is required for a lens mounting mechanism including a locking mechanism, but the structure of the locking mechanism and the lens mounting mechanism is complicated. Therefore, it is difficult to ensure the rigidity and mechanical strength of the lock mechanism and the lens mounting mechanism, and it is difficult to ensure durability, and troubles such as breakdowns are easily induced.

  An object of the present invention is to provide an interchangeable lens attaching / detaching device for an optical apparatus that solves the problems existing in the background art.

  When the interchangeable lens attaching / detaching apparatus 1 for an optical device according to the present invention constitutes an interchangeable lens attaching / detaching device 2 having an attaching / detaching mechanism 2 for attaching / detaching the interchangeable lens L to / from the optical device main body P, the insertion position inserted into the optical device main body P The interchangeable lens L of Xi is rotationally displaced to a predetermined mounting position Xs by the operation of the first operation unit 4, and the interchangeable lens L of the mounting position Xs is rotationally displaced to the insertion position Xi by the operation of the first operation unit 4. An attachment / detachment support mechanism 3 and a lock mechanism 5 that automatically locks to the attachment position Xs when the interchangeable lens L is rotationally displaced to the attachment position Xs and releases the lock by a pressing operation of the second operation unit 6 are provided. It is characterized by becoming.

  In this case, according to a preferred aspect of the invention, the attachment / detachment mechanism 2 includes a mount portion 11 provided in the optical apparatus main body P and a locking portion 15 provided in the interchangeable lens L, and the interchangeable lens L is inserted into the mount portion 11. A fixed portion having a base portion 12 having an inner insertion port 12i and an outer insertion port 14i into which the interchangeable lens L is inserted, and a plurality of fixed-side cutout portions 14c provided at a peripheral edge of the outer insertion port 14i. The ring portion 14 has a middle insertion port 13i into which the interchangeable lens L is inserted, and is rotatably accommodated in a predetermined gap S provided between the base portion 12 and the fixed ring portion 14, and has a middle insertion port. A rotating ring portion 13 provided with a plurality of movable-side cutout portions 13c at positions corresponding to the fixed-side cutout portions 14c. Provided on the outer peripheral surface Lf Accordingly, the interchangeable lens L upon inserting the mount portion 11 side, can be configured with a movable side notch 13c ...-engaging the plurality of locking claw piece portion 15s ... through a fixed-side notch 14c .... In addition, an operation lever portion 4 m provided integrally with the rotation ring portion 13 can be used for the first operation portion 4. On the other hand, the operating range of the first operating portion 4 is set such that the insertion position Xi matches the positions of the fixed-side notch 14c and the movable-side notch 13c, and the positions of the fixed-side notch 14c and the movable-side notch 13c. Can be provided with an operation range restricting portion 16 that restricts between the mounting positions Xs that cause the two to be inconsistent. On the other hand, the lock mechanism 5 includes a locking concave portion 17 provided on the base portion 12 side, and a locking convex portion 19 provided on the rotating ring portion 13 side and urged by the urging member 18, and the mounting position Xs. Thus, the locking recess 17 and the locking projection 19 can be configured to be locked. Further, the second operation portion 6 includes an operation button portion 6p for releasing the locking with respect to the locking concave portion 17 provided on the base portion 12 side by displacing the locking convex portion 19 provided on the rotating ring portion 13 side. In particular, the second operation unit 6 can be disposed at a position Xp that can be operated simultaneously with the first operation unit 4 with one hand. In addition, it is desirable to apply the projector body Po to the optical device body P.

  According to the interchangeable lens attaching / detaching apparatus 1 for an optical apparatus according to the present invention having such a configuration, the following remarkable effects can be obtained.

  (1) The attachment / detachment support mechanism 3 that rotates and displaces the interchangeable lens L to the mounting position Xs or the insertion position Xi by the operation of the first operation unit 4, and the mounting position when the interchangeable lens L is rotationally displaced to the mounting position Xs. Since the lock mechanism 5 that automatically locks to Xs and releases the lock by the pressing operation of the second operation unit 6 is provided, it is possible to contribute to simplification of the entire configuration of the interchangeable lens attaching / detaching apparatus 1 including the lock mechanism 5. Therefore, it is possible to contribute to the downsizing and simplification of the configuration by reducing the occupied space, and further to the cost reduction by reducing the number of parts and the number of manufacturing steps, and easy and good detachability when attaching / detaching the interchangeable lens L. It can be secured.

  (2) Since the overall configuration of the interchangeable lens attaching / detaching apparatus 1 including the lock mechanism 5 can be simplified, the interchangeable lens attaching / detaching apparatus 1 including the lock mechanism 5 can be used even when the heavy interchangeable lens L is attached to or detached from a large optical device. The rigidity and mechanical strength of the lens can be increased, and a high support strength for the interchangeable lens L can be secured. Therefore, it is possible to contribute to improvement of reliability by improving durability and further reducing trouble such as failure.

  (3) According to a preferred embodiment, the attachment / detachment mechanism 2 includes a mount portion 11 provided on the optical device main body P and a locking portion 15 provided on the interchangeable lens L. The mount portion 11 includes a base portion 12 and a fixing ring portion. 14 and the rotating ring part 13 and the locking claw piece 15s... Are provided in the locking part 15, the interchangeable lens attaching / detaching device 1 according to the present invention can be implemented in a more desirable form.

  (4) If the operation lever part 4m provided integrally with the rotation ring part 13 is used for the first operation part 4 according to a preferred aspect, the implementation of the operation lever part 4m is facilitated and the mechanical strength is improved. Greater performance can be obtained from the viewpoint of improving and further ensuring detachability operability.

  (5) According to a preferred embodiment, the operating range of the first operating portion 4 is set such that the position of the fixed side notch portion 14c... And the movable side notch portion 13c. If the operation range restricting portion 16 for restricting the positions of the notches 13c... Between the mounting positions Xs is provided, the detachable operability when using the first operating portion 4 and the reliability of the operation are improved. Can contribute.

  (6) According to a preferred embodiment, the locking mechanism 5 is provided with a locking concave portion 17 provided on the base portion 12 side, and a locking convex portion 19 provided on the rotating ring portion 13 side and biased by the biasing member 18. If the latching recess 17 and the latching projection 19 are configured to be latchable at the mounting position Xs, the configuration can be simplified and miniaturized, and larger from the viewpoint of securing mechanical strength. You can get performance.

  (7) According to a preferred embodiment, the second operating portion 6 is disengaged from the locking concave portion 17 provided on the base portion 12 side by displacing the locking convex portion 19 provided on the rotating ring portion 13 side. If the operation button portion 6p is used, the lock can be easily released by a simple pressing operation.

  (8) If the second operation unit 6 is arranged at a position Xp that can be operated simultaneously with the first operation unit 4 with one hand according to a preferred embodiment, one-touch operation with one hand becomes possible and further ease of attachment / detachment operation is improved. Can contribute.

  (9) If the projector main body Po is applied to the optical apparatus main body P according to a preferred embodiment, the detachable operability and operation of the large interchangeable lens L used for a large projector set in a specific installation location are particularly improved. Certainty can be improved.

  Next, the best embodiment according to the present invention will be given and described in detail with reference to the drawings.

  First, the configuration of the interchangeable lens attaching / detaching device 1 according to the present embodiment will be described with reference to FIGS.

  The illustrated interchangeable lens attaching / detaching apparatus 1 is applied to a large projector (optical apparatus) as shown in FIG. 2, and the projector is connected to a projector main body Po (optical apparatus main body P) and the projector main body Po. And an interchangeable lens L that is attached and detached. The illustrated projector is for business use, and the lens barrel of the interchangeable lens L has a large outer diameter of about 10 [cm] to over 10 [cm]. In the projector body Po, Pc indicates a projector cabinet, and Pco indicates an interchangeable lens attachment / detachment opening provided on the front surface of the projector cabinet Pc. The interchangeable lens attaching / detaching apparatus 1 according to the present embodiment is provided between the projector main body Po and the interchangeable lens L. The interchangeable lens attaching / detaching apparatus 1 includes an attaching / detaching mechanism 2 for attaching / detaching the interchangeable lens L to / from the projector main body Po. In addition, an attachment / detachment support mechanism 3 and a lock mechanism 5 attached to the attachment / detachment mechanism 2 are provided.

  First, the attachment / detachment mechanism 2 serving as a basic configuration will be described. The attachment / detachment mechanism 2 includes a mount portion 11 provided in the projector main body Po and a locking portion 15 provided in the interchangeable lens L. The mount portion 11 further includes a base portion 12, a fixing ring portion 14, and a rotating ring portion 13.

  As shown in FIG. 5, the base portion 12 is formed in a plate shape having a rectangular shape, and a circular insertion port (inner insertion port) 12i into which the lens barrel of the interchangeable lens L is inserted is formed in the center of the surface. Provide. Further, a ring-shaped stepped surface portion 12e along the peripheral edge portion of the inner insertion opening 12i is formed thin on the front surface 12f (front side of the light projecting side) of the base portion 12 as shown in the enlarged enlarged view of FIG. The stepped surface portion 12e becomes a predetermined gap S that accommodates a rotating ring portion 13 described later. Further, four base-side notches 12c... Having a substantially trapezoidal shape are formed in the circumferential portion of the inner insertion opening 12i at intervals of 90 ° in the circumferential direction. The base portion 12 is supported by a second base portion 51 indicated by a virtual line in FIG. 1 so as to be displaceable in the horizontal direction, and the second base portion 51 is vertically supported by a chassis portion 52 indicated by a virtual line. The lens shift mechanism 50 is supported in a freely displaceable manner together with a drive mechanism (not shown).

  As shown in FIG. 5, the fixing ring portion 14 is formed in a plate shape having a ring shape (donut shape) as a whole. As a result, the inner side becomes a circular insertion port (outer insertion port) 14i into which the lens barrel of the interchangeable lens L is inserted, and four fixed side cutouts 14c each having a substantially trapezoidal shape are formed at the peripheral portion of the outer insertion port 14i. Are formed at intervals of 90 ° in the circumferential direction. In this case, the inner diameter of the outer insertion port 14i matches the inner diameter of the inner insertion port 12i described above, and the shape and position of each fixed-side notch 14c. This corresponds to the part 12c. A plurality of mounting surface portions 23 projecting in the radial direction are integrally formed on the outer peripheral edge 14 o of the fixing ring portion 14. Each mounting surface portion 23 is fixed to the base portion 12 side by a fixing screw 24 passed through an in-plane screw insertion hole.

  As shown in FIG.1 and FIG.5, the rotation ring part 13 is formed in the plate shape which becomes a ring shape (doughnut shape) as a whole. As a result, the inner side becomes a circular insertion port (middle side insertion port) 13i into which the lens barrel of the interchangeable lens L is inserted, and four movable side notch portions having a substantially trapezoidal shape are formed at the peripheral portion of the middle side insertion port 13i. .. 13c are formed in the circumferential direction at intervals of 90 [°]. In this case, the inner insertion port 13i has an inner diameter that matches the inner diameter of the outer insertion port 14i described above, and the shape and relative position of each movable-side notch 13c are fixed at the periphery of the outer insertion port 14i. It coincides with the side notches 14c. The rotating ring portion 13 is accommodated in a gap S (step surface portion 12e) formed in the front surface 12f of the base portion 12. Accordingly, the rotating ring portion 13 can be rotated in the circumferential direction by being interposed between the fixed ring portion 14 and the base portion 12, and the movable side notch portions 13 c... Are arranged in the circumferential direction with respect to the fixed side notch portions 14 c. Relative displacement.

  On the other hand, the locking part 15 has four locking claw pieces 15s provided on the outer peripheral surface Lf of the interchangeable lens L. In this case, as shown in FIGS. 1 and 2, a rectangular flange portion 26 is integrally provided on the outer peripheral surface Lf of the interchangeable lens L, and a position spaced apart from the flange portion 26 by a predetermined width backward, That is, the locking claw pieces 15s are arranged at positions separated by a width that is slightly wider than the thickness of the fixing ring portion. Further, the shape and circumferential position of each locking claw piece portion 15s are engaged with the movable side notch portion 13c through the above-mentioned fixed side notch portion 14c when the interchangeable lens L is inserted into the mount portion 11 ( (Fitting) Possible shapes and circumferential positions are selected, and the thicknesses of the respective locking claw pieces 15s are made substantially equal to the thickness of the rotating ring portion 13.

  Thus, the attachment / detachment mechanism 2 includes the mount portion 11 and the locking portion 15, and the base portion 12 having the inner insertion port 12 i into which the interchangeable lens L is inserted and the outer side into which the interchangeable lens L is inserted. A fixing ring portion 14 having an insertion port 14i and having a plurality of fixed side cutouts 14c at predetermined intervals on the peripheral edge of the outer insertion port 14i, and an inner side insertion port 13i into which the interchangeable lens L is inserted. And is rotatably accommodated in a predetermined gap S provided between the base portion 12 and the fixed ring portion 14, and at a position corresponding to the fixed side notch portion 14 c. A rotating ring portion 13 provided with a plurality of movable side cutout portions 13c... And a locking portion 15 on the outer peripheral surface Lf of the interchangeable lens L, thereby inserting the interchangeable lens L into the mount portion 11 side. When fixed By configuring the notch 14c plurality of engageable with the movable-side notch 13c ... through ... locking claw piece portion 15s ..., it can be carried out by a more desirable form an interchangeable lens attachment apparatus 1 according to the present invention.

  Next, the attachment / detachment support mechanism 3 and the lock mechanism 5 attached to the attachment / detachment mechanism 2 will be described. First, the attachment / detachment support mechanism 3 rotationally displaces the interchangeable lens L at the insertion position Xi inserted into the optical device main body P by the operation of the first operation unit 4 to the predetermined mounting position Xs, and the interchangeable lens L at the mounting position Xs. Has a function of rotationally displacing to the insertion position Xi. The first operation part 4 is constituted by an operation lever part 4 m provided integrally with the rotation ring part 13. As shown in FIG. 8, the illustrated operation lever portion 4 m protrudes upward from the rotating ring portion 13, bends in a crank shape along the shape of the base portion 12, and has a tip portion (upper end portion). Is equipped with a rubber cover 4mr that prevents slipping during operation. The operation lever portion 4m can be arbitrarily selected in length and shape (bending position, etc.) in consideration of operability and the like. If such an operation lever portion 4m is provided, greater performance can be obtained from the viewpoint of facilitating implementation, improving mechanical strength, and ensuring detachable operability.

  Further, the first operating portion 4 includes an operating position of the operating lever portion 4m, an insertion position Xi for matching the positions of the fixed-side cutout portions 14c and the movable-side cutout portions 13c, and a fixed-side cutout portion at the mounting position Xs. An operation range restricting portion 16 is provided for restricting between the mounting positions Xs that cause the positions of 14 c... And the movable side notch portions 13 c. In this case, an engagement groove 31 is provided in the operation lever portion 4m along the protruding direction of the operation lever portion 4m, and a lateral restriction groove 32 is formed at the upper center position of the base portion 12. A collar member 33 (described later) is engaged with the restriction groove 32 and the engagement groove 31 across both. Accordingly, the operation range of the operation lever portion 3 c is restricted by the restriction groove 32. Providing such an operation range restricting portion 16 can contribute to further improving the detachability and the certainty of operation when the operation lever portion 4m is used.

  On the other hand, the lock mechanism 5 has a function of automatically locking the interchangeable lens L to the mounting position Xs when the interchangeable lens L is rotationally displaced to the mounting position Xs, and releasing the lock by a pressing operation of the second operation unit 6. In this case, the lock mechanism 5 includes a locking concave portion 17 provided on the base portion 12 side, a locking convex portion 19 provided on the rotating ring portion 13 side and biased by the biasing member 18, The locking recess 17 and the locking protrusion 19 can be locked at the mounting position Xs. As shown in FIGS. 7 to 10, the locking recess 17 is a rear surface 12r of the base portion 12, and a guide surface portion 34 is formed by a stepped surface around the restriction groove 32. On one end side, the locking recess 17 serving as a step surface with respect to the guide surface portion 34 is formed thin. Further, as shown in FIG. 10, the locking projection 19 uses a flat head 35 h formed integrally with the pin member 35. In this case, the pin member 35 is inserted from the rear surface 12r side of the base portion 12 into the restriction groove 32 and further into the engagement groove 31, and the head portion 35h is brought into contact with the guide surface portion 34. Thus, the head portion 35 h is guided along the guide surface portion 34, and functions as a locking convex portion 19 that fits and locks into the locking concave portion 17 provided on one end side of the guide surface portion 34. The head 35h has a D-cut detent function. Further, a collar member 33 having a flange 33h integrally formed from the front surface side of the rotation ring portion 13 is fitted into the pin member 35, and the outer peripheral surface of the collar member 33 is formed on both the engagement groove 31 and the regulation groove 32. And the flange 33h is brought into contact with the front surface of the operation lever 4m.

  The pin member 35 is loaded with a coil spring 18 s serving as the urging member 18, and the operation button portion 6 p using a cylindrical cap member is fixed to the distal end side of the pin member 35 with a fixing screw 36. Thus, the assembly can be easily performed. The operation button unit 6 p constitutes the second operation unit 6. Thus, when the operation lever portion 4m is operated and the interchangeable lens L is rotationally displaced to the mounting position Xs, it is automatically locked to the mounting position Xs. Further, when the operation button portion 6p is pushed, the integral pin member 35 is also pushed, so that the locking convex portion 19 is separated from the locking concave portion 17, and the locking convex portion 19 and the locking concave portion 17 are locked. Canceled. That is, the lock with respect to the mounting position Xs of the interchangeable lens L can be easily released.

  In this way, if the lock mechanism 5 is configured using the locking recess 17, the coil spring 18 s and the locking projection 19, the configuration can be simplified and miniaturized, and from the viewpoint of ensuring mechanical strength. You can get great performance. Further, since the operation button portion 6p (second operation portion 6) is arranged at a position Xp close to the operation lever portion 4m (first operation portion 4), the operation lever portion 4m and the operation button portion 6p can be simultaneously moved with one hand. It becomes possible to operate. That is, a one-touch operation with one hand is possible, which can contribute to further improvement in the attachment / detachment operation.

  Next, a method for attaching / detaching the interchangeable lens L using the interchangeable lens attaching / detaching apparatus 1 according to the present embodiment will be described with reference to FIGS.

  First, the case where the interchangeable lens L is attached to the projector body Po will be described. When mounting, the operation lever portion 4m is displaced to the insertion position Xi. This state is shown in FIGS. At the insertion position Xi, the coil spring 18s interposed between the collar member 33s and the operation button portion 6p is in a compressed state, so that the locking convex portion 19 (head portion 35h) is in pressure contact with the guide surface portion 34. Further, at the insertion position Xi, the circumferential positions of the base-side notch 12c, the fixed-side notch 14c, and the movable-side notch 13c coincide with each other. Therefore, at the insertion position Xi, as shown in FIGS. 1 and 2, the interchangeable lens L is moved in the order of the outer insertion port 14i, the middle insertion port 13i, and the inner insertion port 12i in the mount portion 11 from the rear end side of the lens barrel. The flange portion 26 of the interchangeable lens L comes into contact with the fixing ring portion 14 at the insertion end. At this time, the interval between the flange portion 26 and each locking claw piece portion 15 s is set to a width that is slightly wider than the thickness dimension of the fixing ring portion 14, and the thickness of each locking claw piece portion 15 s. In order to set so as to substantially match the thickness of the rotating ring portion 13, the engaging claw piece portions 15s of the interchangeable lens L are engaged with the movable side cutout portion 13c through the fixed cutout portion 14c ( Mating). That is, at this stage, the interchangeable lens L may be held in one hand and inserted into the projector body Po as it is.

  Next, the operation lever portion 4m is rotated with the other hand, and the operation lever portion 4m is displaced to the mounting position Xs. This state is shown in FIG. 6, FIG. 9 and FIG. If the operation lever portion 4m is rotated from the insertion position Xi to the mounting position Xs, the locking projection 19 (head 35h) slides and displaces in a state of being pressed against the guide surface portion 34, and is displaced to the mounting position Xs. The latching projection 19 is fitted into the latching recess 17 and latched by the bias of the coil spring 18s. At this time, the rotating ring portion 13 is also rotated and displaced together, and the interchangeable lens L in which the engaging claw piece portions 15s are engaged with the movable-side notches 13c is also rotated and displaced together. At the mounting position Xs, as shown in FIG. 6, the positions of the fixed side cutouts 14c and the movable side cutouts 13c become inconsistent, and the interchangeable lens L is mounted at the mounting position Xs and the mounting position Xs. Automatically locked.

  Next, a case where the interchangeable lens L is detached from the projector main body Po will be described. At the time of detachment, the interchangeable lens L is held with one hand, and the operation lever portion 4m is rotated while pushing the operation button portion 6p with the other hand, and is displaced from the mounting position Xs to the insertion position Xi. At this time, by pressing the operation button portion 6p, the integral pin member 35 is also pushed, so that the locking projection 19 is separated from the locking recess 17 and the engagement projection 19 and the locking recess 17 are engaged. Stop (lock) is released. Accordingly, since the interchangeable lens L and the operation lever portion 4m are displaced to the insertion position Xi, the state shown in FIGS. 5, 7, and 8 can be obtained, and the interchangeable lens L can be pulled out from the projector body Po as it is. When the operation button portion 6p is pressed, the amount of push displacement is regulated by the gap between the collar member 33 and the operation button portion 6p. Therefore, the amount of pushing displacement can be set to the minimum amount necessary to release the locking (locking) of the locking projection 19 with respect to the locking recess 17, thereby providing a detent function for the pin member 35. Can be maintained.

  Therefore, according to such an interchangeable lens attaching / detaching apparatus 1 according to this embodiment, the interchangeable support mechanism 3 that rotates and displaces the interchangeable lens L to the attachment position Xs or the insertion position Xi by the operation of the first operation unit 4 is exchanged. A lock mechanism 5 is included to include the lock mechanism 5 that automatically locks to the mounting position Xs when the lens L is rotationally displaced to the mounting position Xs and releases the lock by the pressing operation of the second operation unit 6. This can contribute to simplification of the overall configuration of the interchangeable lens attaching / detaching apparatus 1. Therefore, it is possible to contribute to the downsizing and simplification of the configuration by reducing the occupied space, and further to the cost reduction by reducing the number of parts and the number of manufacturing steps, and easy and good detachability when attaching / detaching the interchangeable lens L. It can be secured. In addition, since the entire configuration of the interchangeable lens attaching / detaching apparatus 1 including the lock mechanism 5 can be simplified, even when the heavy interchangeable lens L is attached / detached to / from a large optical device, the interchangeable lens attaching / detaching apparatus 1 including the lock mechanism 5 can be simplified. Rigidity and mechanical strength can be increased, and high support strength for the interchangeable lens L can be secured. Therefore, it is possible to contribute to improvement of reliability by improving durability and further reducing trouble such as failure. In particular, if the projector main body Po is applied as the optical device main body P, the detachability and operational reliability of the large interchangeable lens L used for a large projector set in a specific installation location can be further improved. it can.

  Although the best embodiment has been described in detail above, the present invention is not limited to such an embodiment, and departs from the gist of the present invention in the detailed configuration, shape, material, quantity, numerical value, and the like. It can be changed, added, or deleted as long as it is not. For example, the base-side notches 12c are not necessarily provided depending on the form of the interchangeable lens L. Further, depending on the form of the interchangeable lens L, the inner insertion port 12i does not need to be inserted into the lens barrel, and the projection light may pass therethrough. Although it is desirable to apply the projector main body Po to the optical device main body P, the optical device main body P can be applied (utilized) to various optical device main bodies P such as a projector and a professional video camera.

The side surface block diagram containing the partial cross section of the interchangeable lens attachment / detachment apparatus which concerns on best embodiment of this invention, External perspective view showing an overview of the interchangeable lens attaching / detaching device, The perspective view seen from the diagonal front (front side) of the attachment / detachment support mechanism and the lock mechanism in the interchangeable lens attachment / detachment device, The perspective view seen from the slanting back surface (rear surface) of the attaching / detaching support mechanism and the locking mechanism in the interchangeable lens attaching / detaching device, Front view of attachment / detachment mechanism, attachment / detachment support mechanism and lock mechanism at the insertion position of the interchangeable lens attachment / detachment device, Front view of attaching / detaching mechanism, attaching / detaching support mechanism, and lock mechanism at the mounting position of the interchangeable lens attaching / detaching device, The rear (rear) view of the attachment / detachment support mechanism and the lock mechanism at the insertion position of the interchangeable lens attaching / detaching device, A partial cross-sectional side view of the attachment / detachment support mechanism and the lock mechanism at the insertion position of the interchangeable lens attachment / detachment device, The rear (rear) view of the attachment / detachment support mechanism and the lock mechanism at the mounting position of the interchangeable lens attaching / detaching device, A partial cross-sectional side view of the attachment / detachment support mechanism and the lock mechanism at the attachment position of the interchangeable lens attachment / detachment device,

Explanation of symbols

  1: interchangeable lens attaching / detaching device, 2: attaching / detaching mechanism, 3: attaching / detaching support mechanism, 4: first operation unit, 4m: operation lever unit, 5: lock mechanism, 6: second operation unit, 6p: operation button unit, 11 : Mount portion, 12: base portion, 12i: inner insertion port, 13: rotating ring portion, 13i: middle insertion port, 13c ...: movable side cutout portion, 14: fixed ring portion, 14i: outer insertion port, 14c ...: Fixed side notch, 15: Locking part, 15s ...: Locking claw piece part, 16: Operation range restricting part, 17: Locking concave part, 18: Energizing member, 19: Locking convex part, P: Optical device body, Po: projector body, L: interchangeable lens, S: predetermined gap, Lf: outer peripheral surface of interchangeable lens, Xi: insertion position, Xs: mounting position, Xp: position where simultaneous operation is possible

Claims (8)

  In an interchangeable lens attaching / detaching apparatus for an optical device having an attaching / detaching mechanism for attaching / detaching an interchangeable lens to / from an optical device main body, the interchangeable lens at the insertion position inserted into the optical device main body is rotated to a predetermined mounting position by operating the first operation unit. An attachment / detachment support mechanism for moving and displacing the interchangeable lens at the mounting position to the insertion position by the operation of the first operation unit, and the mounting when the interchangeable lens is rotated to the mounting position. An interchangeable lens attaching / detaching device for an optical apparatus, comprising: a lock mechanism that automatically locks to a position and releases the lock by a pressing operation of a second operation unit.   The attachment / detachment mechanism includes a mount portion provided in the optical device main body and a locking portion provided in the interchangeable lens. The mount portion includes a base portion having an inner insertion port into which the interchangeable lens is inserted, and the interchangeable lens. Has an outer insertion port for insertion, and a fixing ring portion provided with a plurality of fixed-side notches at a predetermined interval on the peripheral edge of the outer insertion port, and an inner insertion port for inserting the interchangeable lens, And rotatably accommodated in a predetermined gap provided between the base portion and the fixed ring portion, and a plurality of movable sides at a position corresponding to the fixed-side notch at the peripheral portion of the intermediate insertion port. And a locking ring provided on the outer peripheral surface of the interchangeable lens, so that when the interchangeable lens is inserted into the mount portion, the fixed-side notch is provided. The movable side through the part Interchangeable lens attachment apparatus of an optical instrument according to claim 1, characterized in that the cutout portion comprises a plurality of locking pawl portion engageable.   The interchangeable lens attaching / detaching device for an optical apparatus according to claim 2, wherein the first operating portion is an operating lever portion provided integrally with the rotating ring portion.   The operation range of the first operation portion is between an insertion position where the positions of the fixed-side notch and the movable-side notch are matched, and a mounting position where the positions of the fixed-side notch and the movable-side notch are mismatched. 4. The interchangeable lens attaching / detaching device for an optical apparatus according to claim 1, further comprising an operation range restricting portion that restricts the position of the optical device.   The locking mechanism includes a locking concave portion provided on the base portion side, and a locking convex portion provided on the rotating ring portion side and biased by a biasing member, and the locking concave portion at the mounting position. 5. The interchangeable lens attaching / detaching device for an optical apparatus according to claim 1, wherein the engaging convex portion is configured to be engageable.   The second operation part is an operation button part that releases the locking with respect to the locking concave part provided on the base part side by displacing the locking convex part provided on the rotating ring part side. The interchangeable lens attaching / detaching device for an optical apparatus according to claim 5.   The interchangeable lens attaching / detaching device for an optical apparatus according to claim 1, wherein the second operation unit is arranged at a position where the second operation unit can be operated simultaneously with the first operation unit with one hand.   The interchangeable lens attaching / detaching device for an optical apparatus according to claim 1, wherein the optical apparatus main body is a projector main body.

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