JP2003344926A - Lens mount device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the interference of a large-sized lens to a camera main body at the time of hanger mount operation in advance. <P>SOLUTION: The lens mount device is provided with an operation ring 131 for setting the attaching feasible/unfeasible state of a lens barrel and the camera main body by respective mount systems, and a pivotally supporting lever 141 which can be engaged with/disengaged from the camera main body side according to the operating position of the operation ring 131. The pivotally supporting lever is constituted to be locked on the camera main body side in the attaching feasible state of the lens barrel and the camera main body by a hanger mount system, and constituted not to be locked in the camera main body side in the attaching unfeasible state. Since the lens barrel and the camera main body are attached after the lens attaching feasible state by the hanger mount system is set by the operation ring, the interference of the large-sized lens to the camera main body at the time of hanger mount operation is prevented in advance. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens mount device in which either one of a portable lens and a large lens having different mount standards can be selectively attached and detached.

[0002]

2. Description of the Related Art Generally, for a video camera for business use, for broadcasting, etc., it is necessary to use a plurality of types of lenses having various focal lengths and zoom ratios with respect to one camera body. A lens mount device that has a function and that allows the lens to be attached to and detached from the camera body is provided.

Conventionally, in this type of lens mount device,
Combination of portable lens and portable camera body (can be mounted by bayonet mount method) or Combination of large lens and large camera body (can be mounted by hanger mount method)
Has been adopted.

Among these, the lens mount device relating to the combination of the portable lens and the portable camera body is
For example, it is used as shown in FIGS. 39 and 40, and is configured as shown in FIGS. 41 (A) and (B) and FIGS. 42 (A) and (B).

This will be described with reference to FIG. 43 and FIGS. 43 (A) and (B) and FIGS. 44 (A) and 44 (B).

In FIG. 1, reference numeral 1 indicates a handle 2.
In the camera body having the shoulder pad 3 and the through hole 4 at the front end opening in the optical axis direction, and the through hole 4
The mount cylinder 5 is provided so as to project to the outer peripheral edge of the opening.

The mount cylinder 5 is formed of a cylinder having two inner peripheral surfaces 5a and 5b having different radii of curvature.

A flange 6 having a notch 6a for positioning on its inner peripheral edge is provided on the outer peripheral surface of the opening end of the mount cylinder 5 so as to project therefrom.

Reference numeral 7 denotes an operating ring for mounting a lens, which is screwed to the outer peripheral surface of the flange 6 so as to be rotatable and movable back and forth.

The operating ring 7 is integrally provided with an inner flange 8 capable of press-contacting a lens flange, which will be described later, with a camera reference surface (bayonet mount reference surface) 6b of the flange 6, and the inner flange 8 has a peripheral surface. Three notches 9 are formed side by side at equal intervals in the direction.

Reference numeral 10 denotes the inner peripheral surface (lens barrel fitting portion) 5
A lens barrel having an outer peripheral surface (camera body fitting portion) 10a fitted to a, the operation ring 7 being attached to the camera body 1.
It is detachably installed via.

On the outer peripheral surface of the lens barrel 10, three lens flanges 11 which can be inserted into and removed from the respective notches 9 are provided in a protruding manner. Lens reference surfaces (bayonet mount reference surfaces) 11a of these lens flanges 11 are provided. In the notch 6
A detent pin 12 that can be inserted and removed is provided so as to project into the inside of a.

In the lens mount device constructed as described above, in order to mount the lens barrel 10 to the camera body 1, the detent pins 12 and the lens flange 11 are made to face the notches 6a and 9, and the operation ring is provided. This is performed by rotating 7

At this time, the optical path length is set by aligning the lens reference surface 11a and the camera reference surface 6b, and the optical axis is aligned by aligning the camera body fitting portion 10a and the lens barrel fitting portion 5a. .

On the other hand, in a lens mount device relating to a combination of a large lens and a large camera body, FIG.
It is used as shown in FIG.

This will be described with reference to FIG.

In FIG. 1, the reference numeral 21 designates a camera body having a handle 22 at the front upper end portion thereof, and a through hole 23 opening in the optical axis direction at the substantially central portion of the front surface and the through hole 2.
The cylindrical portion 25 is provided so as to project to the outer peripheral edge of the inner opening and the outer peripheral edge of the opening 3.

At the lower front edge and the upper front edge of the camera body 21, a manipulator 27 for projecting to the front of the camera and imparting a rotational movement to a locking rod 26 for mounting the lens barrel.
A wedge 28 having a positioning recess 28a and extending in the left-right direction is attached.

A connector 29 extending in the left-right direction is mounted on the left side of the front surface of the camera body 21,
On the right side of the connector 29, there is provided a recess 30 for preventing the lens from being lifted up and opening forward.

Reference numeral 31 is a lens housing for holding a lens barrel 32, a part of which faces the inside of the barrel portion 25, and is the camera body 21.
It is provided to be removable.

The rear surface of the lens housing 31 has a pin 33 which can be inserted into and removed from the recess 28a, and the wedge 28.
Is attached to the wedge 34.

Further, on the back surface of the lens housing 31,
A pin 35 that can be inserted into and removed from the recess 30 and a connector 36 that can be fitted into the connector 29 are provided.

In the lens mount device constructed as described above, in order to mount the lens housing 31 to the camera body 21, the pins 33 and 35 are respectively formed in the recesses 28a and 30.
This is performed by causing the wedge 28 and the wedge 34 to be engaged with each other, and locking the locking portion 31c of the lens housing 31 to the locking rod 26 by rotating the operator 27 while facing the inside.

By the way, since a normal large lens is superior in optical performance to a portable lens and has a large zoom ratio, there is a demand for mounting this large lens on a camera body of a portable camera. .

In order to meet such a demand, not only the lens housing 31 of the large lens and the camera body 21 of the large camera but also the lens housing 31 of the large lens and the camera body 1 of the portable camera can be attached and detached. It is necessary that a single lens mounting device has a mounting function.

Therefore, in the conventional lens mount device, in order to mount a large lens on the camera body of a portable camera, a lens supporter that enables lens coupling by a hanger mount system is used.

As a result, the lens housing 31 of the large lens
Is attached to the camera body 21 of the large-sized camera by the hanger mount method as shown in FIGS.
As shown in FIG. 5, it is attached to the camera body 42 of the portable camera.

Of these, a method of mounting a large lens on the camera body of the portable camera will be described with reference to FIGS.

First, as shown in FIG. 53, the wedge 43a of the lens supporter 43 is attached to the wedge 41 of the lens housing 41.
The lens barrel 44 is inserted into the opening 43b of the lens supporter 43 by engaging a and operating the hanger.

Next, as shown in FIG. 54, the operator 45 is rotated in the forward direction, and the locking rod 46 is used to rotate the lens housing 4
The first locking portion 41b is locked.

Thereafter, as shown in FIG. 55, after the lens barrel 44 is exposed in the bayonet mount portion 47 of the camera body 42, the camera height adjusting mechanism 48 on the lens supporter 43 is attached to the camera height adjusting mechanism 48 via the mounting plate 49. The camera body 42 is fixed.

In this way, the lens housing 41 of a large lens can be mounted on the camera body 42 of the portable camera.

The camera body 42 is fixed to the camera height adjusting mechanism 48 with a mounting screw 50.

In addition, the camera body 42 of the portable camera
To remove the large lens from the camera, the camera height adjusting mechanism 48 and the camera body 42 are released from the fixed state, the lens barrel 44 is taken out of the bayonet mount 47, and then the manipulator 45 is rotated in the negative direction. The locking rod 46 and the locking portion 4
After releasing the locked state of 1b, the operation opposite to the hanger mounting operation is performed to release the engaged state of each wedge 41a, 43a.

[0035]

However, in this type of lens mount device, when a large lens is mounted on the camera body 21 of a large camera, the hanger mount operation and the lens coupling operation can be performed all at once. On the other hand, when a large lens is attached to the camera body 42 of the portable camera, the hanger mounting operation and the lens coupling operation cannot be performed at once.

As shown in FIG. 56, when the large lens is mounted by the hanger mount system, the lens supporter 4 is used.
If the camera body 42 is fixed to the camera height adjusting mechanism 48 on the camera 3 and then the lens housing 41 is mounted on the camera body 42, the lens barrel 44 and the bayonet are operated during the hanger mount operation shown in FIGS. 57 to 61. This is because the mount portion 47 interferes with each other, and it is necessary to avoid this interference.

As a result, when the large lens is mounted on the camera body of the portable camera by the hanger mount system, the number of operations is increased as compared with the case where the large lens is mounted on the camera body of the large camera by the hanger mount system. There is a problem that the work when mounting a large lens is complicated.

The present invention has been made in view of the above circumstances, and the lens barrel and the camera body can be mounted after the lens mountable state is set by the hanger mount method, so that a large lens for the camera body can be mounted. A lens mount device capable of preventing interference in advance.

[0039]

A lens mount device according to the present invention engages a wedge on a camera body side with a wedge on a lens barrel side, and a hanger mount reference surface on the camera body side and a lens barrel side. Hanger mount method that abuts the reference surface of the hanger mount, and the optical axis alignment reference diameter part on the camera body side and the optical axis alignment reference diameter part on the lens barrel side are fitted together and for mounting on the lens barrel side A lens mount device that enables the lens barrel and the camera body to be mounted by one of the two bayonet mount mounting methods in which the flange is in contact with the bayonet mount reference surface on the camera body side. , An operation ring for setting the mountable / non-mountable state of the lens barrel and the camera body by each mounting method, and the operation ring. And a disengageable a pivoted lever on the camera body side by the operation position of the grayed, the pivot lever,
When the lens barrel by the hanger mount system and the camera body can be mounted, the camera body side can be locked, and when the lens barrel by the hanger mount system and the camera body cannot be mounted, the camera body side It is configured so that it cannot be locked. The lens barrel and the camera body are mounted by the hanger mount method after locking the pivot lever on the camera body side.

[0040]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the configuration and the like of the present invention will be described in detail with reference to embodiments shown in the drawings.

FIGS. 1 to 23 are views showing the main part and each component of the lens mount device according to the present invention, in which the same or equivalent members as in FIGS. 39, 41 and 42 are the same. Reference numerals are given and detailed description is omitted.

In the description of the embodiment, the same reference numerals as those used in the description of the conventional example are used for the members not shown in FIGS.

In the figure, reference numeral 80 designates the lens barrels 10 and 32 and the camera bodies 1 and 21 selectively by either one of the hanger mount system and the bayonet mount system. It is a lens mount device that enables mounting.

The lens mount device 80 has a housing which is opened on the attachment / detachment side (front side) of the lens barrels 10 and 32 and which incorporates optical parts such as a prism (not shown) and a CCD image pickup device (not shown). It is composed of a body 80a and a mounting component 80b such as a slide ring or a cylindrical cam which will be described later and is provided so as to close the front opening of the housing 80a, and is detachably provided on the camera body 1 by means of a screw a. ing.

Reference numeral 81 is a base plate which is substantially rectangular in plan view and has a through hole 82 for light transmission which opens in the direction of the optical axis, and is fixed to the front surface of the camera body 1 and has the screws a at each corner. Is provided with a screw insertion hole 81a.

Inside the through hole 82 of the base plate 81, an inner flange 83 for closing a part of the back side opening is integrally provided, and a part of the inner peripheral surface thereof is approximately 120 ° in the circumferential direction.
A cutout 84 having an extending arc surface 84a is formed.

Further, the base plate 81 is provided with a screw hole 81b which opens at the peripheral edge of the through hole 82.

Reference numeral 85 is a base ring having a flange 86 facing the front side opening peripheral edge of the through hole 82 in the substantially central portion in the axial direction thereof, and fixed to the base plate 81 by a screw 87 screwed into the screw hole 81b. .

The flange 86 of the base ring 85 is provided with a long hole 88 extending approximately 120 ° in the circumferential direction corresponding to the notch 84, and a predetermined direction is provided in the extending direction of the long hole 88. Screw insertion holes 81c are provided in parallel with each other at intervals so that the screws 87 are inserted therethrough.

The base ring 85 is provided with an annular wall 90 by forming a concave groove 89 which is open rearward and extends around the optical axis.
By forming an annular notch 91 in the ring opening opposite to the ring opening of No. 0, the bayonet mount reference surface of the lens flange 11 in the mounted state of the lens barrel 10 and the camera body 1 by the bayonet mounting method. Bayonet mount reference surface 8 facing 11a
5a is provided.

In the opening of the base ring 85, a groove 92 for positioning the lens flange is formed which is open to the bayonet mount reference surface 85a at the uppermost position in the ring circumferential direction and into which the anti-rotation pin 12 can be inserted / removed. ing.

Further, at the front opening end of the base ring 85, a screw portion 91a exposed on the outer peripheral surface of the ring is provided.

Reference numeral 95 denotes the outer peripheral surface 10a of the lens barrel 10.
A slide ring having an inner peripheral surface (optical axis alignment reference diameter portion for bayonet mount) 95a that can be fitted to (optical axis alignment reference diameter portion for bayonet mount), and is provided in the base ring 85 so as to be movable back and forth. On the outer peripheral surface of the ring, the pins 96 facing the slit grooves 93, 94,
97 is attached so as to project in the radial direction of the ring.

A notch 98 corresponding to the groove 92 is formed at the front opening end (on the lens mounting side) of the slide ring 95. From the notch 98, approximately 90 ° in the circumferential direction both inside and outside the ring. Each of the pins 96 and 97 is opened on the peripheral surface.
Are provided with pin mounting holes 95b and 95c.

The slide ring 95 is arranged along the center axis of the base ring 85.
Moves back and forth between the two axial positions in the perspective of 0,
The inner peripheral surface 95a is the outer peripheral surface 10 of the lens barrel 10 in a state of being located at a distant position of these axial direction positions.
It is configured so that the lens barrel 10 and the camera body 1 by a hanger mount system can be mounted while avoiding fitting to a, and the inner peripheral surface 95a has an inner peripheral surface 95a in a state of being located at a near position. The lens barrel 10 of the bayonet mount system and the camera body 1 can be mounted by fitting to the outer peripheral surface 10a of the lens 10.

Reference numeral 99 denotes a cylindrical cam which gives an advance / retreat motion to the slide ring 95 in association with a turning operation of an operation ring which will be described later, which is provided on the central axis (optical axis) of the base ring 85 and has the annular shape. It is rotatably accommodated in the groove 89 and the through hole 82, and a pin engaging piece 100 having a notch 100a is attached on the outer peripheral surface of the cam.

Each of the pins 96,
Two elongated holes 101a, 10 which are inserted by 97 and have respective forming positions different from each other in the cam axis direction and the cam circumferential direction.
A cam hole 101 is formed of 1b and a connecting hole 101c communicating with both of the long holes 101a and 101b.

The cylindrical cam 99 has the pins 96 and 97 in the holes 101a and 101b of the cam hole 101, respectively.
The slide ring 95 is positioned at different advance / retreat positions in the optical axis direction.

Furthermore, both elongated holes 101 of this cylindrical cam 99
Of the a and 101b, the longitudinal dimension of the elongated hole 101a on the side closer to the lens barrel 10 is set to be larger than the longitudinal dimension of the elongated hole 101b on the far side.

Also, the connecting hole 101c of the cylindrical cam 99
Is formed by an inclined surface having a friction angle that facilitates the cam rotation operation.

Reference numeral 102 denotes an operation ring for mounting a lens, which is provided on the central axis of the base ring 85 so as to be rotatable and movable back and forth.
Also, an operation pin 103 that inserts through the notch 100a is attached.

A threaded portion 102a which is screwed into the threaded portion 91a is provided on the inner peripheral surface of the rear opening of the operation ring 102, and the lens flange 11 is mounted on the mount reference surface on the inner peripheral surface of the front opening. Three convex portions 102b that can be pressed against 85a and a concave portion 102c formed between two mutually adjacent convex portions of these convex portions 102b are provided at a predetermined interval in the circumferential direction.

On the outer peripheral surface of the operation ring 102, a ring operator 104 protruding in the radial direction is screwed.

14A and 14B and FIGS. 15A and 15B show a method of mounting a portable lens on a camera body of a large-sized camera (bayonet mount system) by the lens mount device configured as described above. Will be explained.

First, as shown in FIGS. 14 (A) and 14 (B), the operation ring 102 is rotated to be positioned at the initial position.

At this time, since the cylindrical cam 99 of the slide ring 95 rotates together with the operation ring 102 via the operation pin 103, both pins 96 and 97 come to the starting end position of each elongated hole 101a, and the lens It is positioned at the closest axial position with respect to the lens barrel 10.

Next, as shown in FIGS. 14A and 14B, the lens flange 11 and the detent pin 12 are made to face the concave portion 102c and the concave groove 92, respectively, and the bayonet mount reference surface 11a of the lens flange 11 is made. The base ring 85 is brought into contact with the bayonet mount reference surface 85a.

At this time, the optical axis is aligned with the slide ring 9.
5, the inner peripheral surface 95a of the lens barrel 10 is fitted to the outer peripheral surface 10a of the lens barrel 10, and the optical path length is set by the contact of the bayonet mount reference surface 11a of the lens flange 11 with the bayonet mount reference surface 85a of the base ring 85. To be done.

Then, the operation ring 102 is moved to the position shown in FIG.
From the initial position shown in (A) and (B), it is rotated clockwise (direction of arrow A) as shown in FIGS. 15 (A) and 15 (B) to approach the base plate 81 (direction of arrow B). By retracting, the lens flange 11 of the lens barrel 10 is pressed against the bayonet mount reference surface 85a of the base ring 85.

At this time, the lens flange 11 of the lens barrel 10 is held by the operation ring 102 (the convex portion 102b) and the base ring 85 (the bayonet mount reference surface 85a) in a sandwiched state.

Further, the operation pin 103 from the starting end position of the elongated hole 88 to the substantially middle position is shown in FIGS. 14 (A) and 15 (A).
As shown in, the operating ring 10 in the clockwise direction (direction of arrow A)
2 and the cylindrical cam 99 in conjunction with this moving operation.
Rotate in the same direction.

In the slide ring 95, the detent pin 12 faces the concave groove 92 and the notch 98, and the pins 96 and 9 are formed.
Since 7 is inserted into the long hole 101a of the cam hole 101, it remains stopped in the ring axis direction and the ring circumferential direction.

In this way, the portable lens can be attached to the camera body of the large-sized camera by the bayonet mount system.

Further, in order to remove the portable lens from the camera body of the large-sized camera, an operation reverse to the operation for attaching the portable lens is performed.

That is, to remove the portable lens, the operation ring 102 is rotated counterclockwise (the direction opposite to the arrow A direction) from the lens mount position shown in FIGS. 15A and 15B to the initial position. 14A and 14B, the bayonet mount reference surface 8 of the base ring 85 is moved by advancing in a direction away from the base plate 81 (direction opposite to the arrow B direction).
Release the pressure contact state of the lens flange 11 to 5a,
This is performed by taking out the lens flange 11 and the rotation stop pin 12 to the outside of the concave portion 102c and the concave groove 92, respectively.

The attachment / detachment of the portable lens to / from the camera body of the portable camera can be performed in substantially the same manner as the attachment / detachment of the portable lens to / from the camera body of the large-sized camera, and the description of the operation thereof is omitted.

Next, a method of mounting a large lens (a hanger mount system) on the camera body of a portable camera by the lens mount device according to this embodiment will be described with reference to FIGS.

First, as shown in FIGS. 16 (A) and 16 (B), the operation ring 102 is turned to the final position (the position where the ring operator 104 is turned to the lowermost position).

At this time, the operation pin 103 moves in the clockwise direction (arrow A direction) as shown in FIG. 16A along with the operation ring 102 along the extending direction of the elongated hole 88, and interlocks with this movement operation. And the cylindrical cam 99 rotates in the same direction.

The slide ring 95 is a cylindrical cam 9
By the rotation of 9, the pins 96 and 97 are exposed from the long hole 101a of the cam hole 101 into the long hole 101b through the connecting hole 101c, so that the pins 96 and 97 move in the slit grooves 93 and 94 and the lens barrel. It is located at the furthest axial position with respect to 10.

Next, as shown in FIG. 17, the concave portion 52a of the lens supporter 52 in which the camera body 1 is held and fixed in advance.
The pin 33 is faced in the lens housing 31 around the horizontal axis through which the pin 33 passes, as shown in FIG.
The lens housing 31 is held by the lens supporter 52 by causing the pin 35 of the lens housing 31 to face the recess 52b of the lens supporter 52 by rotating.

At this time, the wedges 52b of the lens supporter 52 are engaged with the wedges 34 of the lens housing 31 for optical axis alignment, and the rear end surface (hanger mount reference surface) 31a of the lens housing 31 is the lens supporter. The optical path length is set by abutting on the front end surface (hanger mount reference surface) 52c of 52.

In this case, the optical path length is slightly long (0.1 m
m), but can be corrected by the flange back adjustment mechanism on the lens side.

The slide ring 95 is the lens barrel 1.
Since the lens barrel 10 is positioned at the farthest position in the axial direction with respect to 0, the lens barrel 10 is mounted at the time of mounting operation as shown in FIGS.
3 does not displace and interfere with the slide ring 95 or the like.

Thereafter, the operator 27 on the lens supporter 52 is rotated in the forward direction so that the locking rod 26 is attached to the lens housing 3.
The first locking portion 31b is locked.

In this way, the large lens can be attached to the camera body of the portable camera.

To remove the large-sized lens from the camera body of the portable camera, the operator 27 is rotated in the negative direction to release the locking rod 26 and the locking portion 31b from the locked state. By rotating the lens housing 31 in a direction opposite to the arrow C direction around the horizontal axis through which the pin 33 of the lens 31 passes, the pin of the lens housing 31 is placed outside the recess 52b of the lens supporter 52. After taking out 35, the pin 33 of the lens housing 31 is attached to the lens supporter 52.
It is carried out by removing it from the concave portion 52a.

The attachment / detachment of the large lens to / from the camera body of the large camera can be performed in substantially the same manner as the attachment / detachment of the large lens to / from the camera body of the portable camera.
The description of the operation is omitted.

Therefore, in the present embodiment, since the hanger mount operation and the lens coupling operation can be performed at the same time when the large lens is attached, the operation when the large lens is attached to the camera body of the portable camera by the hanger mount method. The number can be reduced.

Further, in the present embodiment, the operation ring 1
The turning operation of 02 can be converted stepwise into the forward / backward movement of the slide ring 95 by the turning operation of the cylindrical cam 99.

In this embodiment, an example in which the invention is applied to a video camera for business use or a broadcasting station is shown, but the invention is not limited to this, and other various optical devices are similar to the embodiment. Is applicable to.

Next, another second invention of the present invention (claims 7 to)
FIG. 24 shows the lens mount device according to claim 12).
~ It demonstrates using FIG.

FIGS. 24 to 33 are views showing the essential parts and respective components of a lens mount device according to another second invention of the present invention, and FIGS. 2, 39, 41 and 4 in FIG.
The same or equivalent members as those in 2 are given the same reference numerals, and detailed description thereof will be omitted.

Incidentally, in the description of the embodiment, FIG.
For the members not shown in FIG. 33, the same reference numerals as the members used in the description of the conventional example are used.

In the figure, reference numeral 111 denotes a base plate which is substantially rectangular in plan view and has a through hole 112 for light transmission which opens in the optical axis direction, and is fixed to the front surface of the camera body 1.

The base plate 111 has a first screw insertion hole 111a which is opened at each corner of the plate and through which the screw a is inserted, and a second screw which is opened at the peripheral edge of the through hole 112 and is arranged in parallel at a predetermined interval in the circumferential direction. A screw insertion hole 111b is provided.

The symbol H indicates the base plate 111.
The optical system is provided on the back side (opposite the lens side) of the optical system and has optical components such as a prism (not shown) and a CCD image pickup device (not shown).

Reference numeral 113 denotes a base ring having a threaded portion 113a on its inner peripheral surface, which is fixed to the base plate 111 by a screw 115 which is inserted through the second screw insertion hole 111b, and the rear opening end portion is formed with the through hole. Inner flange 114 having an end surface that contacts the peripheral edge of the front opening of 112
Are provided integrally.

Inner flange 11 of this base ring 113
4 has a bayonet mount reference surface 116a on the front end surface.
The three convex portions 116 each having a front end surface (lens mounting side end surface) and extending in the circumferential direction, and the concave portion 117 formed between two mutually adjacent convex portions of the convex portions 116 have a circumferential shape. It is provided with a predetermined interval in the direction.

Inside each recess 117 of the base ring 113, there is provided a rising wall 118 protruding above the inner peripheral edge of the inner flange 114.

Then, the convex portion 1 of the base ring 113
A concave groove 116 b into which the rotation stopping pin 12 can be inserted / removed is formed on the inner peripheral surface of the uppermost convex portion of the numeral 16.

Further, each convex portion 1 of the base ring 113
An arcuate surface 116c having a radius of curvature larger than the outer diameter of the outer peripheral surface 10a of the lens barrel 10 is formed on the shaft 16, and a screw hole 116d is formed in the rear end surface of the ring and the screw 115 is screwed into the screw hole 116d. ing.

Reference numeral 119 designates three circular arc surfaces (optical axis alignment reference diameter portion for bayonet mount) 119a which can be fitted to the outer peripheral surface (optical axis alignment reference diameter portion for bayonet mount) 10a of the lens barrel 10. With a slide block,
It is located in the recess 117 of the base ring 113 and can be moved forward and backward in the radial direction of the ring between two positions, the perspective and the perspective with respect to the ring central axis (optical axis).

Each of these slide blocks 119 is provided with an engaging surface 119b engageable with each cam surface, which will be described later, and a through window 120 through which each of the rising walls 118 faces.

The radius of curvature of the circular arc surface 119a of each slide block 119 is set to be smaller than the radius of curvature of the circular arc surface 116c of the convex portion 116.

Reference numeral 121 denotes a ring operator 1 protruding in the radial direction.
22 is an operation ring having an outer peripheral surface thereof and is provided rotatably and reciprocally on the axis of the base ring 113, and a screw portion 121a screwed to the screw portion 113a is provided on the outer peripheral surface of the rear opening end portion. It is provided.

On the inner peripheral surface of the front opening of the operating ring 121, three convex portions 121b capable of press-contacting the lens flange 11 to the bayonet mount reference surface 116a and two convex portions adjacent to each other among these convex portions 121b. Recesses 121c formed between the parts are provided at predetermined intervals in the circumferential direction, and a cam surface 123 engageable with each engaging surface 119b of the slide block 119 is provided on the inner peripheral surface of the rear opening. ing.

Each of these cam surfaces 123 has two arcuate surfaces 123a and 123b having different radii of curvature, and a connecting surface 123 that connects these arcuate surfaces 123a and 123b.
c, of which circular arc surfaces 123a and 123b are engaged with the respective engaging surfaces 119b of the slide block 119, so that the slide block 119 has two different perspective diameters with respect to the central axis of the base ring 113. It is configured to position in a directional position.

The center angle that determines the circumferential dimension of the arc surface 123a having the smaller radius of curvature of the two arc surfaces 123a and 123b of each cam surface 123 is the circumference of the arc surface 123b having the larger radius of curvature. It is set to an angle larger than the central angle that determines the direction dimension.

Further, the coupling surface 12 of each of these cam surfaces 123
Reference numeral 3c is formed by an inclined surface having a friction angle so as to smoothly rotate the operation ring 121.

Reference numeral 124 denotes three compression coil springs which constitute a moving means together with the cam surface 123 and the engaging surface 119b, and are arranged between the inner surface of each through window 120 and the outer surface of each rising wall 118. It is equipped.

Each of these compression coil springs 124 is
The slide block 119 is biased in a ring radial direction away from the central axis of the base ring 113 so as to be pressed against the cam surface 123.

Reference numeral 125 denotes three cover plates that close the recess 117, and both end edges of the plate are the projections 1.
Two of the sixteen convex portions, which are adjacent to each other, of the sixteen are attached to one side edge, and both side edges are provided with attachment holes 125a that open to the upper and lower end surfaces (front and back surfaces) of the plate.

The reference numeral D indicates the slide block 11
9 shows the biasing direction of the compression coil spring 124 with respect to FIG.

A method of mounting a portable lens (bayonet mount system) on the camera body of a large-sized camera by the lens mount device thus configured will be described with reference to FIGS. 32 and 33.

First, as shown in FIGS. 32 (A) and 32 (B), the operation ring 121 is rotated to position it at the initial position.

At this time, each slide block 119 is
The engaging surface 1 is formed by the elastic force of the compression coil spring 124.
Since 19b engages with the arcuate surface 123b of the cam surface 123, it is positioned at the farthest radial position with respect to the central axis of the operation ring 121.

Next, as shown by the chain double-dashed line in FIG. 32 (B), the lens flange 11 and the detent pin 12 are made to face the recess 121c and the recess groove 116b, respectively, and
Bayonet mount reference surface 11a of lens flange 11
Is brought into contact with the bayonet mount reference surface 116a of the convex portion 116 (base ring 113).

At this time, the optical path length is set by the contact of the lens flange 11 with the bayonet mount reference surface 116a.

Then, the operation ring 121 is moved to the position shown in FIG.
A direction (arrow G direction) in which the base ring 111 is approached as shown in FIGS. 33A and 33B by rotating in the clockwise direction (arrow F direction) from the initial position shown in (A) and (B). The lens flange 11 of the lens barrel 10 is brought into pressure contact with the bayonet mount reference surface 116 a of each convex portion 116 by retracting the lens barrel 11 to the reference surface 116 a.

At this time, the lens flange 11 includes the operation ring 121 (convex portion 121b) and the base ring 113.
It is held by the (convex portion 116).

Further, each slide block 119 advances in the direction of arrow E against the repulsive force of the compression coil spring 124, and the engaging surface 119b is the connecting surface 123 of the cam surface 123.
c, the operation ring 1 because it sequentially engages the circular arc surface 123a.
It is located at the closest radial position to the central axis of 21.

Therefore, the circular arc surface 119a of the slide block 119 and the outer peripheral surface 10a of the lens barrel 10 are fitted to each other to perform optical axis alignment.

In this way, the portable lens can be attached to the camera body of the camera body of the large-sized camera by the bayonet mount method.

Further, in order to remove the portable lens from the camera body of the large-sized camera, the reverse operation to the operation for attaching the portable lens is performed.

That is, to remove the portable lens, the operation ring 121 is rotated counterclockwise (direction opposite to the arrow F direction) from the lens mount position shown in FIGS. 33 (A) and 33 (B) to the initial position. 32A and 32B, the base ring 113 (the convex portion 116) is moved forward in the ring axis direction (the direction opposite to the arrow G direction) away from the base plate 111.
The lens flange 11 is released from the pressure contact state with respect to the bayonet mount reference surface 116a, and the lens flange 11 and the detent pin 12 are taken out of the recess 102c and the groove 92.

The attachment / detachment of the portable lens to / from the camera body of the portable camera can be performed in substantially the same manner as the attachment / detachment of the portable lens to / from the camera body of the large-sized camera, and the description of the operation thereof is omitted.

Next, a method of mounting a large lens (a hanger mount system) on the camera body of a portable camera by the lens mount device according to this embodiment will be described with reference to FIGS. 34, 17 and 18.

First, as shown in FIGS. 34 (A) and 34 (B), the operation ring 121 is rotated to be positioned at the final position (the position where the ring operator 122 is rotated to the lowermost position).

At this time, each slide block 119 is
The engaging surface 1 is formed by the elastic force of the compression coil spring 124.
Reference numeral 19b denotes a connecting surface 123c of the cam surface 123 and an arc surface 123.
Since they are sequentially engaged with b, they are positioned at the farthest radial position with respect to the central axis of the operation ring 121.

Then, as shown in FIG. 17, the concave portion 52a of the lens supporter 52 in which the camera body 1 is held and fixed in advance.
The pin 33 is faced in the lens housing 31 around the horizontal axis through which the pin 33 passes, as shown in FIG.
By rotating the lens housing 31, the pin 35 of the lens housing 31 faces the recess 52b of the lens supporter 52 to hold the lens housing 31 with respect to the lens supporter 52.

At this time, the wedges 34b of the lens supporter 52 are engaged with the wedges 34 of the lens housing 31 for optical axis alignment, and the rear end surface (the hanger mount reference surface) 31a of the lens housing 31 has the lens supporter 52. The optical path length is set by abutting on the front end surface (hanger mount reference surface) 52c of.

In this case, the optical path length becomes slightly longer (0.
1 mm), but can be corrected by the flange back adjustment mechanism on the lens side.

Further, since each slide block 119 is positioned at the farthest position in the ring radial direction with respect to the central axis of the base ring 113, the lens barrel 10 is displaced during the mount operation as shown in FIGS. Therefore, it does not interfere with the slide block 119 or the like.

After that, the operator 27 on the lens supporter 52 is rotated in the forward direction so that the locking rod 26 is attached to the lens housing 3.
The first locking portion 31b is locked.

In this way, the large lens can be attached to the camera body of the portable camera.

To remove the large lens from the camera body of the portable camera, the operator 27 is rotated in the negative direction to release the locking rod 26 and the locking portion 31b from the locked state. By rotating the lens housing 31 in a direction opposite to the arrow C direction around the horizontal axis through which the pin 33 of the lens 31 passes, the pin of the lens housing 31 is placed outside the recess 52b of the lens supporter 52. After taking out 35, the pin 33 of the lens housing 31 is attached to the lens supporter 52.
It is carried out by removing it from the concave portion 52a.

The attachment / detachment of the large lens to / from the camera body of the large camera can be performed in the same manner as the attachment / detachment of the large lens to / from the camera body of the portable camera, and the description of the operation is omitted.

Therefore, in this embodiment, since the hanger mount operation and the lens coupling operation can be performed at the same time when the large lens is attached, the operation when the large lens is attached to the camera body of the portable camera by the hanger mount method. The number can be reduced.

Further, in this embodiment, the operation ring 1
The rotation operation of 21 can be converted into the forward / backward movement of each slide block 119 stepwise by the engagement of the engagement surface 119b and the cam surface 123.

In this embodiment, an example in which it is applied to a video camera for business use or a broadcasting station has been shown, but the present invention is not limited to this, and other various optical equipments are the same as the embodiment. Is applicable to.

Next, another third invention of the present invention (claim 13).
FIG. 3 shows the lens mount device according to claim 19).
This will be described with reference to FIGS.

35 to 38 are views showing a main part and each component of a lens mount device according to another third invention of the present invention. In FIG. 35, the same or equivalent members as in FIG. 1 are the same. Reference numerals are given and detailed description is omitted.

In the description of the embodiment, FIGS.
The same reference numerals as those used in the description of the conventional example are used for the members not shown in FIG.

In the figure, reference numeral 131 denotes a lens mount operation ring having the same function as that of the operation ring 102, and is provided on the camera body 21 via the base ring 85 so as to be rotatable and movable back and forth. Has been.

This operating ring 131 has a ring operating element 132 which is exposed on the outer peripheral surface of the ring and projects in the ring radial direction. By operating this ring operating element 132 in the ring rotating direction, a hanger mount system or a bayonet mount is used. The lens barrels 10 and 32 and the camera bodies 1 and 21 can be mounted or not mounted according to the method.

Reference numerals 133 and 134 respectively denote a pair of metal fittings for lever mounting which are parallel to each other in the camera width direction (horizontal direction), which are provided below the screwing position of the screw a and are mounted on the front surface of the camera body 21. It is fixed by screws (not shown).

These lever mounting brackets 133, 134
Is a horizontal portion 13 facing the front surface of the camera body 21.
3a, 134a and their respective horizontal parts 133a, 134
a vertical portion 133b that is continuous with a and projects toward the lens mounting side,
It is formed by bending with a substantially L-shaped metal plate made of 134b.

Screw insertion holes 135 and 136 through which the above-mentioned mounting screws (not shown) are inserted are provided in the horizontal portions 133a and 134a of the lever mounting brackets 133 and 134, respectively.

Further, these lever mounting brackets 133, 1
The vertical portions 133b, 134b of the reference numeral 34 are integrally provided with substantially hemispherical convex portions 137, 138 projecting in a direction in which they approach each other at the edge of the base plate side. Pivot pins 139 and 140 projecting in a direction approaching each other are caulked and fixed.

Reference numeral 141 denotes a pivot lever having a lever operator 141a extending in the horizontal direction, which is rotatably provided on the camera body 21 via the lever mounting metal parts 133 and 134.

The pivot lever 141 is arranged so that the camera body 21 can be moved depending on the operation position of the operation ring 131.
Is configured to be disengaged with respect to.

That is, the pivot lever 141 is provided with the convex portions 137, 1 when the lens barrel 10 and the camera body 21 by the hanger mount system can be mounted.
38 is configured to be able to be locked in the recesses 154a and 155a, and when the lens barrel 10 and the camera body 21 by the hanger mount method cannot be mounted, the protrusions 137 and 138 are inserted into the recesses 154a. , 15
It is configured so that it cannot be locked to 5a.

The pivot lever 141 has arcuate surfaces 142a, 14 which can be fitted to a part of the outer peripheral surface of the operation ring 131.
Left and right first rising walls 142, 14 having 3a
3 and the ring opening 131a of the operation ring 131
A circular piece 145 having a lever opening 144 having a diameter larger than the diameter of the ring opening, and the ring opening extending to a part of the outer peripheral edge of the circular piece 145 so as to project outward from the first rising walls 142 and 143. It is formed of a plastic piece including a rectangular piece 146 having a notch 147 communicating with 131a.

Further, the pivot lever 141 has a protrusion 148 facing the screw a in the lever locking state.
149 is integrally provided so as to be interposed between the circular piece 145 and the rectangular piece 146.
48, 149 and second rising walls 150, 151 connected to the first rising walls 142, 143 are integrally provided along the back side edge of the rectangular piece 146.

The pivot lever 141 rotates in the directions of arrows M and N as shown in the figure, and is positioned at the position shown by the solid line in FIG. 35 in the lever locked state, and in the lever disengaged state. It is located at the position indicated by the chain double-dashed line.

Reference numerals 152 and 153 denote the pivot pins 13 described above.
9 and 140 are arm pieces having pin holes 152a and 153a facing each other, and are integrally provided on the front surface or the back surface of each of the protrusions 148 and 149.

Reference numerals 154 and 155 denote the pivot lever 14
1 is elastically deformed so that the convex portions 137, 138 are formed.
Is a locking piece having recesses 154a and 155a into which the projections 148 and 155 can be inserted and removed, and is integrally provided on the back surface of both the front and back surfaces of each of the projections 148 and 149.

In the lens mount device constructed as described above, when the ring operator 132 is operated to the initial position in the ring rotation direction as shown by the chain double-dashed line in FIG. 35, the lens barrel 10 of the bayonet mount system, The mountable state of 32 and the camera bodies 1 and 21 is set.

After that, even if the pivot lever 141 is operated to rotate in the direction of arrow M from the position shown by the chain double-dashed line in FIG. 35, the first rising is made before reaching the lever locking position shown by the solid line in FIG. The first rising wall 1 on the right side of the walls 142 and 143
Since 43 contacts the ring operator 132, it cannot be locked at the lever locking position.

Next, as shown by the solid line in FIG. 35, when the ring operator 132 is operated to the final position in the ring rotation direction, the mountable state of the lens barrel 10 and the camera body 21 by the hanger mount system is set.

Thereafter, when the pivot lever 141 is rotated in the direction of arrow M from the position shown by the chain double-dashed line in the figure toward the lever locking position shown by the solid line, the ring operator 132 and the operation ring 131 are respectively moved. The operation ring 131 faces the notch 147 and the first rising walls 142 and 143.
Is elastically deformed so as to narrow the width of the notch 147 and the protrusions 137 and 138 face the recesses 154a and 155a, so that the lever can be locked at the lever locking position as shown by the solid line in FIG. .

Therefore, in this embodiment, the lens barrel 1 is detached by engaging and disengaging the pivot lever with respect to the camera body side.
0 and the mountable / unmountable state of the camera body 21 can be detected. Therefore, the lens barrel 10 and the camera body 21 should be mounted after the lens mountable state by the hanger mount method is set by operating the operation ring 131. You can

In addition, in this embodiment, the pivot lever 14
1 is provided with the projecting portions 148 and 149 facing the screw a for mounting the base plate when the lever is locked. That is, if the fastening by the screw a is insufficient, the projecting portions 148 and 149 come into contact with the screw a. Therefore, it is possible to detect the attachment failure of the base plate 81 (lens mount device 80) to the camera body 21.

Incidentally, the pivot lever 141 in this embodiment.
To release the lock from the locked state, the locking pieces 154, 155
Recesses 154, 155 and lever mounting brackets 133, 13
The lock state with the convex portions 137 and 138 of No. 4 is released, and the pivotal lever 141 is rotated in the arrow N direction from the lock position as shown in FIG.

In this embodiment, the pivot lever 1
Although the lever opening 144 of 41 has a round hole, the third invention of the present invention is not limited to this, as long as it enables lens coupling by a hanger mount system. For example, a rectangular hole may be used.

Further, in the present invention, the lens mount structure on the camera body side in which the mountable / non-mountable state of the lens barrel and the camera body by each mounting method is set includes, for example, a slide ring that advances and retracts in the optical axis direction. It is needless to say that it may be one provided with a slide block that moves forward and backward in a direction perpendicular to the optical axis, and is not particularly limited.

[0168]

As described above, according to the present invention, it is possible to mount the lens barrel and the camera body by each mounting method.
It is equipped with an operating ring for setting the disabled state and a pivoting lever that can be engaged and disengaged on the camera body side depending on the operating position of this operation ring.This pivoting lever is used for hanger mount type lens barrel and camera body Since it can be locked to the camera body side in the mountable state, and it can not be locked to the camera body side in the unmountable state of the lens barrel and camera body by the hanger mount method,
Whether the lens barrel and the camera body can be mounted or not can be detected by engaging and disengaging the pivot lever with respect to the camera body side.

Therefore, the lens barrel and the camera body can be mounted after the lens mountable state by the hanger mount system is set by the operation ring.
It is possible to prevent interference of the large lens with the camera body.

According to the present invention, the pivot lever is provided with a protrusion facing the screw for mounting the base plate when the lever is locked. That is, if the screw is not fastened, each protrusion abuts the screw. Therefore, the mounting failure of the base plate on the camera body can be detected, and the erroneous mounting of the lens on the camera body by each mounting method can be prevented in advance.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a main part of a lens mount device according to the present invention.

2A to 2C are a plan view, a front view, and a side view showing the entire lens mount device according to the present invention.

FIG. 3 is an exploded perspective view showing an example in which the lens mount device according to the present invention is used in a portable camera.

FIG. 4 is a side view showing an example in which the lens mount device according to the present invention is used in a portable camera.

5A and 5B are a front view and a cross-sectional view showing a base plate (dummy block) of the lens mount device according to the present invention.

6A and 6B are a front view and a plan view showing a base ring (bayonet mount) of the lens mount device according to the present invention.

7A and 7B are a rear view and a side view showing a base ring of the lens mount device according to the present invention.

8A to 8C are a plan view, a front view, and a side view showing a slide ring (slider) of the lens mount device according to the present invention.

FIG. 9 is a sectional view showing a pin (spacer) for advancing and retracting a slide ring of the lens mount device according to the present invention.

10A to 10D are a front view, a side view, a bottom view and a developed view showing a cylindrical cam of a lens mount device according to the present invention.

11A to 11C are a front view, a side view, and a bottom view showing a pin locking piece (cam flange) of the lens mount device according to the present invention.

12A to 12C are a front view, a side view and a bottom view showing an operation ring (bayonet ring) of the lens mount device according to the present invention.

13 (A) and 13 (B) are a front view and a side view showing a pin for rotating a cylindrical cam of the lens mount device according to the present invention.

14 (A) and 14 (B) are a front view and a sectional view for explaining lens mounting (1) by a bayonet mount method using the lens mount device according to the present invention.

15 (A) and 15 (B) are a front view and a cross-sectional view for explaining lens mounting (2) by a bayonet mount method using the lens mount device according to the present invention.

16 (A) and 16 (B) are a front view and a sectional view for explaining lens mounting by a hanger mount method using the lens mount device according to the present invention.

FIG. 17 is a side view shown for explaining a hanger mount operation (1) for a large lens using the lens mount device according to the present invention.

FIG. 18 is a side view shown for explaining a hanger mount operation (2) for a large lens using the lens mount device according to the present invention.

FIG. 19 is a cross-sectional view shown for explaining a lens coupling operation (1) by a hanger mount method using the lens mount device according to the present invention.

FIG. 20 is a cross-sectional view shown for explaining a lens coupling operation (2) by a hanger mount method using the lens mount device according to the present invention.

FIG. 21 is a cross-sectional view shown for explaining a lens coupling operation (3) by a hanger mount method using the lens mount device according to the present invention.

FIG. 22 is a cross-sectional view shown for explaining a lens coupling operation (4) by a hanger mount method using the lens mount device according to the present invention.

FIG. 23 is a cross-sectional view shown for explaining a lens coupling operation (5) by a hanger mount method using the lens mount device according to the present invention.

FIG. 24 is an exploded perspective view showing a main part of a lens mount device according to another second invention of the present invention.

25 (A) and 25 (B) are a front view and a sectional view showing a mounting state of a base ring to a base plate of the lens mount device according to the second invention.

26A and 26B are a rear view and a side view showing a base plate of a lens mount device according to a second invention.

27 (A) and 27 (B) are a front view and a cross-sectional view showing a base ring of a lens mount device according to a second invention.

FIG. 28 is a front view showing a cover plate of the lens mount device according to the second invention.

29A and 29B are a front view and a side view showing a slide block of a lens mount device according to a second invention.

30 (A) and 30 (B) are a front view showing an operation ring of the lens mount device according to the second invention and a front view showing how the operation ring is attached to the base ring.

31 (A) and 31 (B) are a rear view and a cross-sectional view showing an operation ring of the lens mount device according to the second invention.

32 (A) and 32 (B) are a front view and a sectional view for explaining lens mounting (1) by a bayonet mount method using the lens mount device according to the second invention.

33 (A) and 33 (B) are a front view and a cross-sectional view for explaining lens mounting (2) by the bayonet mount method using the lens mount device according to the second invention.

34 (A) and 34 (B) are a front view and a cross-sectional view for explaining mounting of a lens by a hanger mount method using the lens mount device according to the second invention.

FIG. 35 is an exploded perspective view showing a main part of a lens mount device according to another third invention of the present invention.

36 (A) to (C) are a plan view, a front view, and a side view showing a lever mounting bracket of the lens mount device according to the third invention.

37 (A) to (C) are a front view, a side view, and a bottom view showing a pivot lever of a lens mount device according to a third invention.

38A and 38B are a rear view and a sectional view showing a pivot lever of the lens mount device according to the third invention.

FIG. 39 is an exploded perspective view showing an example in which a conventional lens mount device is used in a portable camera.

FIG. 40 is a side view showing an example in which a conventional lens mount device is used in a portable camera.

41 (A) and 41 (B) are a front view and a cross-sectional view shown for explaining lens mounting (1) by a bayonet mount method using a conventional lens mount device.

42 (A) and 42 (B) are a front view and a side view for explaining lens mounting (2) by a bayonet mount method using a conventional lens mount device.

43A and 43B are a front view and a side view showing a lens barrel of a portable camera.

44 (A) and (B) are a front view and a cross-sectional view showing a bayonet mount portion of a conventional lens mount device.

FIG. 45 is a side view showing an example of a conventional lens mount device used in a large camera.

FIG. 46 is a perspective view showing an example of a conventional lens mount device used in a large-sized camera.

47 (A) and (B) are an exploded perspective view and a side view for explaining a hanger mounting operation using a conventional lens mounting device.

FIG. 48 is a procedure of a lens coupling operation by a hanger mount method using a conventional lens mount device (1).
Sectional drawing shown in order to demonstrate.

FIG. 49 is a procedure for a lens coupling operation by a hanger mount method using a conventional lens mount device (2).
Sectional drawing shown in order to demonstrate.

FIG. 50 shows a procedure of a lens coupling operation by a hanger mount method using a conventional lens mount device (3).
Sectional drawing shown in order to demonstrate.

FIG. 51 is a procedure (4) of a lens coupling operation by a hanger mount method using a conventional lens mount device.
Sectional drawing shown in order to demonstrate.

FIG. 52 is a procedure (5) of a lens coupling operation by a hanger mount method using a conventional lens mount device.
Sectional drawing shown in order to demonstrate.

FIG. 53 is a side view shown for explaining the procedure (1) of the hanger mounting operation using the conventional lens mounting device.

FIG. 54 is a side view shown for explaining the procedure (2) of the hanger mounting operation using the conventional lens mounting device.

FIG. 55 is a side view shown for explaining the procedure (3) of the hanger mounting operation using the conventional lens mounting device.

FIG. 56 is a side view showing a state in which lenses cannot be coupled by a hanger mount method using a conventional lens mount device.

FIG. 57 is a sectional view showing a procedure (1) in the case where the conventional lens mounting device cannot perform a lens coupling operation by a hanger mounting method.

FIG. 58 is a cross-sectional view showing the procedure (2) when the lens coupling operation cannot be performed by the conventional hanger mount method using the lens mount device.

FIG. 59 is a sectional view showing a procedure (3) in the case where the lens coupling operation by the hanger mount method using the conventional lens mount device cannot be performed.

FIG. 60 is a cross-sectional view showing the procedure (4) in the case where the lens coupling operation by the hanger mounting method using the conventional lens mounting device cannot be performed.

FIG. 61 is a cross-sectional view showing the procedure (5) in the case where the lens coupling operation cannot be performed by the conventional hanger mount method using the lens mount device.

[Explanation of symbols]

85 ... Base ring 85a ... Bayonet mount reference plane 88 ... long hole 95 ... Slide ring 95a ... inner peripheral surface 96,97 ... pin 99 ... Circumferential cam 100 ... Pin locking piece 101 ... Cam hole 101a, 101b ... long holes 101c ... connecting hole 102 ... Operation ring 103 ... Operation pin

   ─────────────────────────────────────────────────── ─── Continued front page    F-term (reference) 2H044 AE01 AE09 EC01 EC11 HB01                 2H101 EE08 EE33                 5C022 AC31 AC54 AC78

Claims (7)

[Claims] 1. A hanger mount system in which a wedge on the camera body side and a wedge on the lens barrel side are engaged with each other, and a hanger mount reference surface on the camera body side and a hanger mount reference surface on the lens barrel side are brought into contact with each other. And the optical axis alignment reference diameter part on the camera body side and the optical axis alignment reference diameter part on the lens barrel side, and the mounting flange on the lens barrel side contacts the bayonet mount reference surface on the camera body side. A lens mount device capable of mounting the lens barrel and the camera body by one of the two mounting methods of the bayonet mount system, wherein the lens barrel and the camera body by each mounting method. The operation ring for setting whether or not the camera can be attached and detached, and the pivot point that can be engaged with and disengaged from the camera body depending on the operation position of this operation ring. A lever, and the pivot lever is configured to be lockable to the camera body side when the lens barrel and the camera body by the hanger mount system are mountable, and the lens barrel and the lens barrel by the hanger mount system. A lens mount device characterized in that the camera body cannot be locked when the camera body is not mountable. 2. The lens mount device according to claim 1, wherein the pivot support lever is provided with a lever opening portion larger than a ring opening portion of the operation ring. 3. The lens mount device according to claim 2, wherein a ring operator protruding in a ring radial direction is provided on an outer peripheral surface of the operation ring. 4. The lens according to claim 3, wherein the pivot lever is formed with a notch which the ring operator faces when the lever is locked, and the notch is communicated with the lever opening. Mount device. 5. The lens mount device according to claim 4, wherein the operation ring is provided on the camera body so as to be rotatable and movable back and forth via a base plate. 6. The lens mount device according to claim 5, wherein a plate mounting screw that can be screwed onto the camera body is held on the base plate so as to be able to move back and forth. 7. The lens mount device according to claim 6, wherein the pivot lever is provided with a protruding portion that is opposed to the plate mounting screw in a lever locking state.