JPS5942527A - Optical instrument with attaching and detaching mechanism - Google Patents

Abstract

PURPOSE:To confirm engagement with and disengagement from the opponent instrument by providing a positioning member which engages with and disengages from a positioning recessed part, unlocking operation member, and releasing operation drag control means which reduces a drag applied to the operation member abruptly. CONSTITUTION:When an interchangeable lens 1 is mounted, a positioning pin 5 and a lens driving shaft 7 engage with the positioning recessed part 4 on the interchangeable lens side and the driven shaft 6 in a recessed part A. When the unlocking operation member 8 is pressed to unlock them, the pin 5 coupling with the operation member 8 by a coupling plate 12 moves back and an engagement pin 20 moves onto the intermediate body part 5a of the pin 5, so the drag to the operation member 8 by a spring 18 is reduced through a coupling member 9 and the pin 5 moves back abruptly to disengage the driving shaft 7. Further, an operator knows the abrupt drag reduction by feeling, so engagement and disengagement are confirmed. Therefore, the damage of an engagement part caused when the interchangeable lens is detached in an incomplete disengagement state is evaded.

Description

Detailed Description of the Invention Technical Field The present invention relates to a positioning member that engages and disengages from the four positioning parts of a counterpart device, such as a camera with a removable interchangeable lens, and a system that allows the engagement of this positioning member to be controlled by an external operation. The present invention relates to an optical device with an attachment/detachment mechanism, in which the attachment/detachment mechanism is comprised of a lock release operation member or the like.

PRIOR ART As an optical device equipped with this type of attachment/detachment mechanism, the positioning pin and the unlocking operation member are connected and integrated by a connecting member, and this unifying mechanism is elastically supported by another spring member. The positioning pin and the unlocking operation member are forced to protrude from the front of the camera body, and the protruding positioning pin is engaged with the four positioning parts on the mount surface on the interchangeable lens side, and the lock is released against the biasing force of the spring bar. A camera (Japanese Utility Model Publication No. 53-50420) has been known in which the attachment/detachment mechanism t is configured such that the positioning bin is fixed by pushing the operating member.

However, with this type of attachment/detachment mechanism, if you do not push the lock release operation member into the position where it hits the stopper inside the camera body, you will feel that the positioning pin is recessed from the mount surface on the camera body side and is in a completely disengaged state. Since it is difficult to kneel down, there is a risk that the positioning pin may not be fully disengaged before the interchangeable lens can be rotated and removed. - If the interchangeable lens is forcibly rotated and removed until the disengagement is incomplete (1), accidents may occur, such as the edges of the four positioning parts being damaged and the protruding positioning pins damaging the interchangeable lens side mount surface.

In addition, in an AF camera that transmits the driving force for focusing control output from the camera body side to the interchangeable lens side via a drive transmission shaft that meshes between the camera body and the interchangeable lens, the drive transmission shaft If the mechanism is such that the disengagement of the interchangeable lens is linked to the unlocking operation, the disengagement may be incomplete, and if the focusing switch is pressed by mistake, the drive transmission shaft may become engaged due to shallow engagement. This causes problems such as splashing and damage to the meshing part.

Purpose This invention solves the above problems in the prior art,
It is an object of the present invention to provide an optical device with an attachment/detachment mechanism that can avoid scratches or failures in attachment/detachment 4a tRc caused by incomplete engagement and disengagement with a mating device. It is something.

Examples Below, based on the first diagram to the seventh UA, the first embodiment of the present invention will be explained.
An example will be described.

The optical device of this embodiment has an interchangeable lens 1 as a counterpart device, and is a camera body 2 that can be attached and detached by rotating with the interchangeable lens 1. A positioning pin 5 that protrudes and retracts from a predetermined position on the surface 3a and can be engaged with and disengaged from the positioning portion 4 formed on the interchangeable lens side mount surface 3b, and a positioning pin 5 that moves forward and backward in the same optical axis direction as the positioning pin 5, and is attached to the camera body side mount surface 3a. A lens drive shaft 7 that protrudes and retracts from a predetermined position and can be engaged with and disengaged from the driven shaft 6 in the transmission shaft recess A formed in the interchangeable lens side 7 mount 3b, and a positioning recess for the positioning pin 5 and the lens drive shaft 7. 4 and a lock release operation member 8 for releasing the engagement with the driven shaft 6 by external operation.
Due to the linking member 9 that links the retracting operation of the lens drive shaft 7 with the retracting operation of the lens drive shaft 7, the engagement claw of the positioning bin 5 with the positioning portion 4 is sufficiently small within the release operation range of the lock release operation member 8. After reaching a predetermined release operation position where the positioning action is sufficiently performed by engagement, the drag force applied to the lock release operation member 8 during the release operation is rapidly reduced, and when the above-mentioned Fff7 release operation position is exceeded, the lock release operation 1ηI is performed.
The release operation of the holder 48 releases the positioning bin 5 and the lens 1π.
The state in which the movable thl+ 7 is sufficiently engaged is suddenly changed to the state in which the engagement III'i' is completely released.

The lock release operation member 8 is fitted into a guide shaft 10 placed at a predetermined position inside the camera body 2 near the mount surface 3a, and can freely move forward and backward from the front cover 11 of the camera body 2. A fill spring 14 is interposed between the connecting plate 12 extending from the rear end of the lock release operation member 8 to the back of the mount surface 3a and the camera body fixing member 13a on the rear side of the connecting plate 12. lock lIl'l
! The removal operation member 8 is urged toward the front side of the camera body 2.

The positioning bin 5 is provided in a protruding manner at the end of the connecting plate 12 extending to the back of the mount surface 3a, and the positioning bin 5 advances and retreats as the lock release operation member 8 moves forward and backward, and the interchangeable lens 1, which is a mating device, moves forward and backward. The mounting surface 3b of the mounting surface 3b can be engaged with and disengaged from the positioning portion 4.

The linking member 9 has a general hook shape consisting of two branch pieces 9a and 9b, and as shown in FIGS. A guide shaft that is pivotally attached to the main body 2 and has a guide hole 16 formed at the tip of one branch piece 9a extending substantially parallel to the mount surface 3a and protruding from the camera main body fixing member 13b toward the υ optical axis direction. 17, and the coil spring 18 attached to this guide shaft 17 biases the tip of the branch piece 9a toward the front side of the camera body, so that the part of the branch piece 9a moves forward and backward (
It is designed to be able to swing in the same direction as the optical axis.

A U-shaped fork portion 19 is formed at the tip of the branch piece 9a, and this fork portion 19 is externally fitted into the Ifil groove 7a of the lens drive shaft 7, while an engaging pin is formed at the tip of the other branch piece 9b. 20, (when the I'r positioning pin 5 is in the advanced position in which it can normally engage with the positioning pin 5, a small diameter rear body part 5b which forms a step with respect to the large diameter middle body part 5a of the positioning pin 5);
In this case, the engagement pin 20 is located at a position closer to the axis than the area corresponding to the outer diameter of the large-diameter middle body portion 5a.

The lens drive shaft 7 has its rear end connected to the camera body fixing member 1.
3bK) A driven gear 22 is fixed to the rear end of the lens drive shaft 7 to mesh with a drive gear 21 supported on the rear side of the camera body fixing member 13b. The rotation of a motor (not shown), which is installed in the drive gear 2 and is controlled by a focus control device, is transmitted to the drive gear 21 via an arbitrary transmission system, and then the rotation of the drive gear 21 is transferred from the driven gear 22 to the lens drive shaft 7. The signal is transmitted to the driven shaft 6 via .

In the case of this optical device having an interchangeable lens as the counterpart device, the operation when removing the counterpart device will be described below with reference to FIGS. 5 to 7.

In the state shown in FIG. 5 in which the interchangeable lens 1 is attached to the camera body 2, the positioning pin 5 is
protrudes from the mount surface 3a and engages with the positioning portion 4 of the interchangeable lens side mount surface 3b, while the coil spring 18
The lens drive shaft 7 also protrudes from the mount surface 3a and is formed on the interchangeable lens side mount surface 36 in conjunction with the branch piece 9a of the linking member 9 that rotates toward the front side of the camera body using the rotation shaft 15 as a fulcrum due to the biasing force. Driven shaft 6 in four parts A for transmission shaft
is engaged in. At this time, the engaging pin 2o of the branch piece 9b of the linking member 9 is at the position 14 facing the small diameter rear body portion 5b of the positioning pin 5, so that the lens drive shaft 7 can be advanced from the camera body of the linking member 9. Rotation toward the front side is sufficiently permissible.

With the interchangeable lens attached, when the lock release operation member 8 protruding from the front side of the camera body is pressed against the coil spring 14 to release the lock, the lock 1 release operation part is released via the connecting plate 12. The positioning pin 5 integrated with the positioning pin 8 begins to retreat toward the back side of the camera body, and during the retreat while the engagement with the four positioning parts 4 is still fully released, the positioning pin 5 is inserted into the large diameter as shown in FIG. The rear end edge of the body portion 5a hits the retaining pin 20 of the linking member 9, and due to the action of the coil spring 18, the resistance to the unlocking operation of the locking member 8 suddenly increases.

When the lock release operation member 8 is further pushed with a pressing force that overcomes the increased resistance force that meets the backward restriction by the locking pin 20, the linking member 9 rotates toward the back side of the camera body and the engagement pin 20 is the positioning pin 50 large diameter middle body g (S5b
Since the lock release operation member 8 rides on the lock release member 8, the drag force applied to the lock release operation member 8 is rapidly reduced. Since the lock release operation member 8 has been pushed with enough force to overcome the increased resistance until just before that, the positioning pin 5 rapidly retreats due to the sudden decrease in the resistance, and the mount surface 3a also sinks completely. Retract at the appropriate disengagement position.

On the other hand, when the engagement pin 20 rides on the large diameter middle body part 5FL of the positioning pin 5, the lens drive 11i1h 7
In order to completely retreat from the mount surface 3a into the camera body@-2 in conjunction with the rotation of the linking member 9 toward the back of the camera body, be sure to disengage the lens drive shaft 7 before disengaging the positioning pin 5. The decoupling will take place.

In this way, the positioning bin large diameter middle body portion 5 of the engagement bin 20
As the resistance to the unlocking operation decreases rapidly as the vehicle rides over to a, the unlocking operating unit assembly 8 is suddenly pushed into Bl< by the force of the Oshida force that had been applied to the unlocking operating member 8 until just before that point. The positioning pin 5 moves from a fully engaged state to a completely disengaged state at once, and the disengaged state 1n is reliably achieved.

Moreover, since the operator can intuitively sense the sudden decrease in drag, he can easily tell that the engagement has been disengaged.
Interchangeable lens 1 that can be edicted and has not been released
Accidents such as damaging the mounting surface 3b or damaging the edges of the four positioning parts 4 due to rotational removal can be avoided.

Further, since the disengagement of the lens drive shaft 7 is performed prior to the disengagement of the positioning pin 5, the lens drive shaft 7 and the driven i! Accidents caused by incomplete disengagement between 1t and 6 can also be reliably prevented.

In this embodiment, the positioning pin 5 is restricted from retreating by receiving the engaging pin 20 at the boundary end surface between the positioning pin large-diameter middle body part 5a and the small-diameter rear body part 5b. The portion may have a tapered No. 9 curved cam surface shape to adjust the drag force.

Further, instead of the configuration in which the backward movement is restricted by the lick mechanism as described above, the backward movement of the L-determining pin 5 may be restricted by the magnetic force of the permanent magnet 1.

Finally, a second embodiment of the present invention will be explained based on FIG. 8.

This embodiment is applied to a camera body 2 that does not have a drive transmission shaft, and the positioning bin 5 can be moved back! 11
In order to control the movement, attach one end to the camera body fixing member 13c.
A protruding portion 23a is formed on the free end side of the plate d-spring 23, which is curved in the direction of the axis of the positioning pin 5.
The boundary between the large-diameter middle body part 5a and the small-diameter rear body part 5b of the position J+, which is about to retreat with the lock release operation, forms a boundary between the large-diameter middle body part 5a and the small-diameter rear body part 5b! /f! The a side is received by the protruding portion 23a of the plate spring 23 to restrict its backward movement.

In the unlocking operation in the case of this embodiment, as shown in FIG. When the lock release operation member (not shown) is pressed in the state that Initially, the boundary end surface of the large-diameter middle body portion 5a forms the protruding portion 23 of the leaf spring 23.
aK profile, the resistance to the release action increases.

As the pressure on the unlocking operation member is further increased,
Overcoming the biasing force in the protruding direction of the protruding portion 23a of the plate d screw 23, the ↑2IJ1 determining pin 5 retreats, and the protruding portion 23a
2 rides on the large-diameter middle body portion 5a, so the resistance to the release operation is rapidly reduced. Therefore, due to the residual force of the pressing force that had been applied to the unlocking operation member until just before, the positioning pin 5 immediately retreats from the mount surface 3a into the camera body 2, shifting to a completely disengaged state.

Next, a third embodiment of the present invention will be described based on FIG. 9.

This embodiment is also applied to the camera body 2 which does not have a drive transmission link. Connect one end to &12 and connect the other end to camera body 2.
The snap action spring 24 is pivoted to a part of the
is used.

Connecting plate side pivot portion 2 of snap action spring 24
4 ai, rank? In the state shown in FIG. 9 in which the 1 fixing pin 5 protrudes from the mount surface 3a of the camera body 2 and is fully engaged with the positioning recess 4 of the intersecting lens 1 (1!+1 mount σ113b), the camera body side It is set so that it is slightly closer to the front i?II side of the camera body than the mating part 24b.

Therefore, when you press the lock release operation part 8 to perform the lock release operation, the camera body 2 will move in the front and rear direction h'.
In the CE mode, in the initial state of unlocking when the connecting plate side pivot portion 24a of the snap action spring 24 is biased toward the camera body body 1 side than the attachment portion 24b to the camera body body 1, the snap action spring 24 is expanded. The restoring force is applied to the camera body side m1, and the force of the snap action spring 240 in addition to the biasing force of the coil spring 14 acts as a drag force on the lock Ii-release operation part 8, making the release operation heavier. When the connecting plate side pivot portion 24a crosses the neutral point that is aligned with the attachment portion 24b on the camera body side 41, the original force is reversed to the back side of the camera body and acts on the lock release operation unit set 8. The drag force decreases rapidly. Therefore, similarly to each of the previous embodiments, the positioning pin 5 is placed in the 1st position. It is possible to go from a state where the engagement with the L-determining recess 4 is sufficient to a completely disengaged state all at once.

Next, a fourth embodiment of the present invention will be described based on the tenth embodiment.

This embodiment is also an example of application to a camera body 2 in which the drive transmission shaft cannot be moved (Jiff), and in order to fully restrict the backward movement of the positioning pin 25, a part of the camera body 2 is
While pressing the click member 27 with the spring 26 against the circumferential groove 25a, the support piece 29 provided at the rear end of the locking pin 25 and the support piece 3 provided on the lock angle '1/release operation member 28 are pressed.
A coil spring 31 is interposed between the positioning pin 25 and the positioning pin 25, so that the force stored in the coil spring 31 due to the pushing displacement of the locking member 28 regulates the movement of the positioning pin 25.゛“
When the force is increased by h9, the positioning pin 25 is caused to move backward.

The click member 27 has a positioning pin 25 that is connected to the interchangeable lens 1.
It is arranged so that it fits into the circumferential groove 25a when it is in a position where it completely engages with the four positioning parts 4 of the side mount surface 3b.

The positioning pin 25 is biased toward the front side of the camera body by a coil spring 32 supported by a part of the camera body 2, and is mounted when the unlocked state is released.
On the other hand, the return of the lock release member 28 to the front side of the Katara main body is made possible by the force nv (
I-The restoring operation of the coil spring 31 that stores energy is used to measure this.

A guide shaft 33 is provided protruding from the back side of the support piece 3o of the lock release operation member 28, and
9 and insert it into the hole 34 formed in the lock release operation member 28.
In one operation of advancing and retreating the positioning bin 25, the position 1:1 relationship between these two parts is maintained at one point.

The support piece 30 has a mounting end 30a and a coil spring receiving end 30.
There is a step H' between the positioning pin 25 and the coil spring 31 due to an unusual ring hole or lens mounting shape 1. If the lock release operation member 28 and the positioning pin 25 are locked, the lock release operation member 28 and the positioning pin 25 can be separated by pushing the lock release operation member 28 to the point where the mounting end 30a of the support piece 30 can directly press the positioning pin side support piece 29. The space between them is in an externally connected state, and the pressing force applied to the lock release operation member 28 is directly applied. The r'i determination bin 25 is used to release the binding.

In the lock release operation in this embodiment, when the lock release operation member 28 is pushed in the state shown in FIG. The restoring force of the compressed coil spring 31 gradually increases with this pushing displacement.

When the restoring force of the coil spring 31 exceeds the disengagement resistance force exerted on the υ positioning pin 25 by the click member 27 and the coil spring 32, the positioning pin 25 begins to retreat and clicks on its periphery Fi 25a. Since the member 27 is easily engaged, the drag force applied to the positioning pin 25 is rapidly reduced.
The positioning pin 25 immediately shifts from the engaged state to the completely disengaged state.

When the lock release operation member 28 is released, the coil springs 3
1, the lock release operation member 28 moves until the collar 33a abuts the support piece 29, and then the positioning pin 2
5 and the unlocking operation member 28 are both advanced toward the front side of the camera body by the restoring action of the coil spring 32. Therefore, the lock release operation part 828 is
The camera body 2 is moved forward by an amount corresponding to the sum of the advancing amount due to the restoring action of the coil spring 31 interposed between the coil springs 29 and the advancing amount of the positioning bin 25.

In this embodiment, since there is almost no sense of stopping during the lock release operation, there is no risk of the user assuming that the engagement release is complete due to the sense of stopping.

Next, a fifth embodiment of the present invention will be described based on FIG. 11.

In this embodiment, a plate spring 39 is used in place of the coil spring 31 in the fourth embodiment to link the unlocking operation member 38 with the positioning pin 35.

The end of the plate spring 39 extending toward the positioning pin 35 is shaped like a fork, and this fork part is connected to the positioning pin 350 circumferential groove 3.
5t) is fitted externally.

As a countermeasure in case the positioning bin 35 becomes unable to release the lock, in the case of this embodiment, the lock release operation member 38
When the lock release operation member 38 is pushed greatly, the rear end surface 38a of the middle body part of the lock release operation member 38 shines directly on the stopper 40 that extends from the rear end of the positioning pin 35 toward the lock release operation member 38, and the lock release operation is performed. The member 38 and n+1 of the positioning pin 35 are put into a printing-like connection state so that the pressing force applied to the lock release operation member 38 is directly applied to the positioning pin 35.

The other configurations are the same as those of the fourth embodiment.

In the fourth embodiment, in the lock release operation, the force that overcomes the disengagement resistance acting on the positioning pin 35 is stored in the plate spring 39 that is deflected and deformed as the lock angle removal operation member 38 is pushed and displaced. The only difference is that the other operations are the same as in the fourth embodiment.

Next, a sixth embodiment of the present invention will be described based on FIG. 12.

This embodiment is different from the camera body 2 in the first embodiment.
The configuration incorporated on the side is applied to the side of the interchangeable lens 1, and the positioning pin 5 is made to protrude and retract from the mount surface 3b of the interchangeable lens 1 in the optical axis direction, and is attached to the mount surface 3a of the camera body side. While making it possible to engage and disengage from the positioning recess 4, the driven I6 that engages and disengages from the lens drive shaft 7 in the four transmission shaft parts formed on the camera body side mount surface 3a is connected to the mount surface 3b of the interchangeable lens 1. The structure of the linking member 9, which extends in the optical axis direction and links the positioning pin 5 with the driven shaft 6, is the same as the linking part where the positioning pin 5 is linked with the lens drive shaft 7 in the first embodiment. Kidnapping 9
It is similar to

A large gear 4 formed on the peripheral surface of the lens barrel is attached to the front end of the driven shaft 6.
A small gear 42 that meshes with the lens drive shaft 7 is fixedly installed on the camera body 2 side through the drive gear 21 and the slave gear 22.
The rotation transmitted to the driven shaft 6 is transmitted to the large gear 41 via the small gear 42 on the side of the interchangeable lens 1, and the eaves operate a lens moving device (not shown) as the large gear 41 rotates. .

Although the lock release operation part H is not shown, its structure is the same as that of the first example, except that it is provided on the interchangeable lens 1 side. By pushing the front lever, it is integrally connected to the lock release operation member via the connecting plate 12 (the fixing pin 5 is inserted into the interchangeable lens l from the mount 1 (3b). .

In this way, this embodiment has the configuration of the first embodiment.
! Since this embodiment is applied to the interchangeable lens 1 side, the unlocking operation is the same as in the first embodiment.

In addition, in the first embodiment (FIGS. 1 to 7 1), the second embodiment (FIG. 81), and the sixth embodiment (FIG. 12), in the release operation of the positioning pin 5, , some play is allowed while the positioning pin 5 retreats from the normal engagement position to the position where it is regulated by the engagement release regulating member (the engagement pin 20, the protruding portion 23a of the plate spring 23). However, limited to such row/y configurations, the lock release regulating member is set so that the regulation is activated from the time it is in the normal engagement position 1h, and the push operation of the lock release operation member 8 is A large resistance force may be applied to the unlocking operation of the locking station 1 from the beginning.

Furthermore, in each of the above embodiments, a lifting platform is shown in which the mating device m1 facing the tip of the positioning pin and the mating device surface facing 71 at the tip of the drive transmission member are the same surface, that is, the mounting surface. For example, even if the surface of the mating device facing the tip of the first axis or the mount mj, and the surface of the mating device mj facing the tip of the positioning bin is a surface adjacent to the mount surface and having a slight difference in level, By taking into account the step difference in setting the protrusion amount of the position ↑h fixing pin and the drive shaft, the same method can be applied without any inconvenience.

The optical devices that can be applied are not limited to the camera body and interchangeable lenses in each of the above embodiments, but auxiliary devices such as an intermediate ring and a rear con- ction lens, which are mating devices to the camera body, are also effective. Also – in addition to reflex cameras,
It can be applied to interchangeable lens ranging cameras, video cameras, etc., and is also effective for projectors and enlargers.

Effects According to the optical device with the attachment/detachment mechanism of the present invention, the positioning part is connected to the positioning part assembly and is operated to release the engagement of the positioning part 16 with the positioning part 1 and the hakama parting part of the unlocking operation part side. By setting the position of the assembly at a predetermined release operation position 16 at which sufficient engagement with the IKt determining recess is achieved, the drag force applied to the lock release operation member during the release operation is rapidly reduced, resulting in the following effects. It will be done.

(b) Since the drag force applied to the lock release operation part side suddenly decreases after reaching a predetermined position in the corner release operation area, the lock release operation part is affected by the force of the pressing force that was applied to the lock release operation part side just before that point. Since the side is pushed in rapidly and the positioning member can be moved from a fully engaged state to a completely disengaged state at once, it is possible to remove the rotating claw of a mating device while the disengagement is incomplete. It is possible to avoid malfunctions that could lead to damage to the four positioning parts or the mounting surface.

(b) When applied to an optical device configured to perform 1-way motion transmission with a partner device, disengagement is ff1i as described above.
Since the shaft is actually exposed, there is no misalignment of the drive transmission shaft, and it is possible to prevent scratches in the meshing portion and failure of the transmission system.

(c) The operator can intuitively sense the sudden decrease in drag, so he can confirm that the disengagement has been completed, and the other device can be completely removed. .

) 3rd. 4th. As in the fifth embodiment, as the unlock operation progresses on the lock release operation part side, the lock release operation is carried out by the armature part group that accumulates force against the resistance of the position f6 determining member regulation part group. By linking the member to the positioning member, there is no sense of stoppage during the unlocking operation by the lock release operation member, and the sense of stoppage gives rise to a misunderstanding that the release of engagement has been completed. You can eliminate the inconvenience.Also,
In other embodiments as well, if the stroke-like play is eliminated and the release restriction mechanism is designed to work from the beginning as described above, the sense of stoppage can be similarly eliminated.

[Brief explanation of the drawing]

FIG. 1 is a front view of a camera body showing a first embodiment of the present invention, FIG. 2 is a rear view of an interchangeable lens that can be attached to and removed from the camera body, FIG. 3 is a front view of the main parts of the camera body, and FIG. The figure is a sectional view of the main part of the camera body, Fig. 5 is a sectional view of the main part showing the state in which the interchangeable lens is attached to the camera body, and Figs. 6 and 7 are sectional views of the main part showing the lock M' release operation, respectively. , FIG. 8 is a front view of essential parts showing a second embodiment of the present invention, FIG. 9 is a cross-sectional view of essential parts showing a third embodiment of this invention, and FIG. FIG. 11 is a sectional view of essential parts showing a fifth embodiment of the present invention, and FIG. 12 is a sectional view of essential parts showing a sixth embodiment of this invention. 1...Interchangeable lens, 2...Camera body, 3a+3b
...Mount surface, 4...Determine recess at position 1, 5...
Positioning member, 6... Driven shaft, 7... Lens drive shaft, 8, 28° 38... Lock release operation member, 9...
Linking member, 12... Connection plate, 14118131.32
... Coil spring, 15 ... Rotating shaft, 20 ... Engagement pin, 23 ... Leaf spring, 23a ... Projection, 24 ...
...Snap action spring, 26...spring,
27... Click member, 29° 30... Support piece, 3
9...Plate spring applicant Minolta Camera Co., Ltd.

Claims (1)

[Scope of Claims] (1) An optical device that is attachable to and detachable from a mating device, comprising a positioning member that engages and disengages from the four positioning parts of the mating device, and an operation for releasing the positioning member from the four positioning parts in conjunction with the positioning member. and a lock release operation member that is applied to the lock release operation member in accordance with the release operation from a predetermined position within the release operation range of the lock release operation member before the positioning function due to the engagement of the positioning member and the four positioning parts is released. Optical device with a detachable mechanism that includes a release operation drag control means that rapidly reduces drag (2) The release operation drag control means releases the lock release operation member until the external operation force applied to the lock release operation member exceeds a predetermined limit value. The optical device (3) release operation drag control means with an attachment/detachment mechanism according to claim (1), which is a lock release operation member regulating member that regulates the operation, is configured such that the engagement release external force applied to the positioning member is a predetermined limit value. A positioning member regulating member that restricts the disengagement of the positioning member until exceeding Optical device (4) with an attachment/detachment mechanism according to claim (1), comprising an elastic member that stores a lock release force that exceeds the lock release operation range of the lock release operation member. Among them, an optical device with an attachment/detachment mechanism (5 ) The optical device with a detachable mechanism according to claim (3) or (4), wherein the optical device is the main device of an exchangeable optical system consisting of a main device and a sub device that are mutually detachable. 6) The optical device with a detachable mechanism according to claim (3) or (4), wherein the optical device is a sub-device of an exchangeable optical system consisting of a main device and a sub-device that are mutually detachable. Equipment (7) The main equipment includes a focus control device, a lens drive shaft that is rotationally controlled by the focus control device and transmits drive to the driven shaft of the companion sub-device, and a lock release operation member linked to the lens drive shaft for positioning. Claim No. 5, which has a linkage mechanism that engages and disengages the lens drive shaft from the driven shaft as the member engages and disengages.
Optical equipment with attachment/detachment mechanism described in section