JPS5922930B2 - Camera accessory mounting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an accessory mounting device such as an interchangeable lens equipped with a mount mechanism, and particularly to an accessory mounting device with good mounting operability.

Conventionally, various methods have been used for attaching accessory devices such as interchangeable lenses, intermediate rings, strobes, electric hoisting devices, etc. to the camera body or the attachment side of the reference lens body, etc. .

For example, the methods conventionally used for attaching interchangeable lenses such as standard lenses, wide-angle lenses, telephoto lenses, zoom lenses, etc. to the camera body can be broadly classified into two methods. The first method is called a multi-rotation screw mount or screw mount, in which a threaded part is provided on the end face of the interchangeable lens, and the lens is screwed into the camera body while rotating. This allows the camera to be firmly attached using the frictional force created by the wedge effect on the mount reference surface on the camera body side. When installing this method, it is necessary to precisely match the screw threads on both the lens side and the camera body side while inserting and rotating, which lacks operability and speed. Since it is necessary to rotate the main body many times, the operation is complicated, and the final tightening position varies depending on the operating force during the screwing operation. Furthermore, in the case of a configuration in which a member that interlocks with the interlocking member on the camera side is provided on the lens side, and the two interlock when the lens is attached, the lens body is rotated when the lens body is attached. An escape mechanism is required to prevent the interlocking members on the lens body side and the camera side from interfering with each other, and a space is required within the camera that allows the rotation of the interlocking member on the lens body side. In addition to the above-mentioned drawback that the stopping position of the lens body cannot be determined with high precision, there is a fatal drawback that the lens side and the camera side do not interlock with each other with high precision. The second method is called the bayonet method, in which male and female bayonet members are provided on the lens body and camera body respectively, and after inserting the lens body, the lens body is rotated to engage both bayonet members. It is something that makes you

This method has the advantage that a stopper or lock member is provided on the lens side or camera body side at the position where both bayonets engage, and the final mount operation position is always in the fixed position, and there is a gap between the lens side and the camera body. If an interlocking member such as a mechanical or electrical interlocking member for transmitting a preset aperture signal or an interlocking member for automatic aperture is provided, the camera side and lens side must be configured in advance so that they interlock at the final mounting position. becomes possible. However, with this method, when mounting the lens, the lens itself must be rotated to perform the mounting operation, so the interlocking member on the lens side is also rotated, and this interlocking member cannot be moved on the camera body side. This requires a configuration with a space, and therefore cannot be used with various camera bodies, and has the drawback that the camera must be dedicated to the lens used. In addition, if there are multiple interlocking members on the lens side, in order to operate the lens body by a fixed amount, an escape mechanism may be provided on the camera side interlocking member as necessary to prevent the rotation when the lens side interlocking member rotates. There is a drawback similar to the first method described above, in that a mechanism must be provided for absorbing and permitting balance in the direction. In order to solve the above-mentioned drawbacks of the second method, a third method conventionally used is to place only one of the bayonet members of the bayonet method, that is, one of the bayonet members on the lens side or the camera body side, with the ring facing down. There is a method in which a rotatable bayonet tightening ring is provided, and after the lens body is inserted into the camera body, the movable tightening ring is rotated to tighten and mount the lens.

In this method, the lens body is extended into the camera body in a fixed position relationship, and when mounting, it is only necessary to rotate the tightening ring, so the above-mentioned interlocking member is placed in advance in a fixed position in an engagement relationship. Therefore, there is an advantage that there is no problem even if there are multiple interlocking members, and as in the first and second methods above, there is a relative distance between the lens side mount member and the camera side mounting surface. Although it is movable and does not have the drawbacks of wearing the lens-side mounting surface and causing the optical mounting reference surface to shift, the tightening ring is installed in the narrow space between the lens body and the camera-side mounting surface. As a result, the disadvantage of poor operability arises. Particularly in small cameras, multiple operating members are attached to the lens barrel, such as an aperture preset ring and a focusing ring, which take up little space, so the tightening ring itself has to be small due to its structure. Furthermore, since this ring must be provided near the mounting surface, it is difficult to perform a reliable tightening operation using fingers or the like. As mentioned above, various conventional mounting mechanisms have been proposed and have been used in various ways, but each has its own advantages and disadvantages.They solve the above-mentioned drawbacks at the same time, are suitable for compact accessory devices, and are not only suitable for attaching objects such as camera bodies. The current state of the art in this technical field is to create a mounting mechanism that does not impose any restrictions on the mounting side, but only the RQ sewing method has been proposed. As mentioned above, the object of the present invention is to
An object of the present invention is to provide a device for attaching accessories such as lenses, which can be linked with high accuracy when being attached, and which is always set in a ready state for attaching by interlocking with the operation of removing from the attached side, improving the operability of attaching. It is. Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

1 to 6 show a first embodiment in which the accessory attachment device of the present invention is applied to an interchangeable lens for a single-lens reflex camera. In FIG. 1, 1 is a ring-shaped 2 denotes a distance adjustment ring, which is an intermediate helicoid ring 2' that meshes with the threaded surface of the lens barrel body 1. It is installed as one unit.

Reference numeral 3 denotes a movable inner cylinder that supports an optical member (not shown), and a helicoid surface is formed on the outer periphery of the movable inner cylinder, which meshes with the inner helicoid of the helicoid ring 2'.

Reference numeral 4 indicates a bayonet mount retaining ring integrally fixed to the rear end of the lens barrel body 1, and an engraved portion 4a is provided on the outer periphery of the ring to indicate a reference mounting position when mounted. ing.

Reference numeral 5 denotes an aperture preset ring rotatably fitted into a concave ring formed between the lens barrel body 1 and the retaining ring 4, and 6 a bayonet fitted into the rear opening step of the retaining ring 4. This member performs a tightening operation against the camera side bayonet pawl when the lens is attached to the camera body, which will be described later.

The bayonet member 6 is integrally fixed to the retaining ring 4 by a screw 7 screwed onto the retaining ring 4. Reference numeral 8 denotes a mount member, which includes the retaining ring 4 and the bayonet member 6.
A rear wall member 9, which is rotatably fitted into the concave ring between the two and whose rear part is formed into a cylindrical shape and has a standard fitting diameter part 8a, and has an optical axis opening, is fitted. ing.

Reference numeral 10 designates a positioning pin planted on the mount reference position surface of the mount member 8, and is fitted into a position regulating slit (25a' to be described later) formed in the camera side bayonet portion to lock the mount member 8. It is something.

11a is an interlocking member for transmitting a preset aperture signal, so that the aperture signal can be transmitted from the interlocking member on the camera side when shooting in automatic aperture adjustment (EE) mode, and to the interlocking member on the camera side when shooting in manual aperture adjustment mode. , and a ring 11 which is rotatably disposed within the lens barrel body 1 or on the mount member 8.

Reference numeral 12a designates an automatic aperture drive lever, and each lever is projected at approximately 900 position through through slots 9a and 9'b provided in the rear wall member 9, and is inserted into the lens barrel body 1 (see Fig. 2). Alternatively, it is formed integrally with an automatic aperture ring 112, which will be described later, which is rotatably arranged on the mount member 8. The bayonet member 6 has bayonet pawls 6b, 6c, and 6d spaced apart by 120 degrees as shown in FIG. Reference numeral 13 denotes a locking release pin which is inserted into the mount member and urged to protrude. The internal structure of the lens barrel including the locking release pin 13, each lever 11a, 12a, etc. is shown in FIG.

This figure shows the internal configuration of the lens barrel in a prone position after being removed from the camera body, and the release pin 13 is fitted into a through hole drilled in the mount member 8 so that it can be displaced in the optical axis direction of the lens barrel. are combined. Reference numeral 14 designates a locking pin that is fitted together with a pressing spring 15 into a hole formed in a portion of the retaining ring 4 facing the pin 13 (with the lens barrel removed from the camera body). Before the lens body is attached to the camera body, the retaining ring 4 and the mount member 8 are locked so that the mount member 8 is in a fixed relative position with respect to the lens barrel. Reference numeral 11 denotes an intermediate ring integrally formed with a preset aperture signal transmission interlocking member 11a, a part of which is formed with an arm portion 11b, and rotatably fitted into the retaining ring 4.

Reference numeral 17 denotes an aperture preset cam ring rotatably fitted into the lens barrel body 1. A cam portion 17a is formed on the inner periphery of the ring, and interlocking arms 17'B and l7'b are formed on a part of the cam portion 17a. It is formed.

Reference numeral 18 designates an absorption spring suspended between the arm portion 11b of the intermediate ring 11 and the interlocking arm 17b' of the cam ring 17. In FIG. He is in a forced and prone position.

Further, the interlocking arm 17b' is provided with a protrusion 5a on the inner peripheral surface of the preset ring 5 in its rotation path.
b7, and a counterclockwise biasing spring 19 always biases the ring on the other interlocking arm 17b'.
By manually adjusting the ring 5, the cam ring 17 can be set at a desired rotational position by engaging and interlocking with the protrusion 5a. , the drive lever 12a is integrally formed with a drive ring 12 rotatably disposed within the lens barrel, and the ring forms an interlocking arm 12b in a portion thereof.
Reference numeral 20 is a C-shaped lever, the bent end 20a of which is formed in a relationship that matches the interlocking arm 12b, and the other end has a cam follower pin 2 that engages with the cam portion 17a of the cam ring 17.
0b is implanted and rotatably held within the lens barrel body 1,
The drive lever 12a is configured to rotate until the pin 20b is regulated by the cam 17a when the drive lever 12a is driven by the automatic diaphragm lever on the camera side.

Reference numeral 21 denotes a blade drive ring for driving the aperture blades 22, and a partially bent portion 21a of the ring engages with the C-shaped lever 20 to operate in conjunction with the lever.

21A is a biasing spring in the direction of narrowing down the aperture blades.

The 1 drive ring 21, the cam ring 17, the C-shaped lever 20, the aperture devices 21, 22, etc. may be any known preset aperture device for single-lens reflex cameras, and are not directly related to the present invention. Therefore, detailed explanation thereof will be omitted below. The cam ring 17 has a bent arm portion 17b in a part thereof.
have. Reference numeral 23 designates a charge member which is screwed onto the lower surface of the retaining ring 4 with a screw 24 and whose end is positioned in the rotation path of the bending arm 17b.

A fully closed spring 26 is suspended between the ring 12 and the mount member 8 and holds the aperture blade 22 in the fully open position against the spring 21A. Note that the bayonet claws 6b, 6c, and 6d of the bayonet member 6 have slot grooves 6 on their side walls, respectively.
A is pressed and deformed after cutting, and each claw part is configured to have elasticity in the optical axis direction of the lens barrel. When attaching the lens body to the camera, the camera side bayonet claw and each lens side bayonet are The claw portions 6b, 6c, and 6d are elastically engaged.

When the interchangeable lens body having the above structure is installed in the camera body by aligning the mounting reference marks 4a and inserting the fitting surface 8a of the mount member 8 into the camera side mounting opening, the locking action of the locking pin 14 allows the lens to be attached in advance. Claw portion 6 of bayonet member 6
b, 6c, 6d and the position regulating pin 10 of the mount member 8 are in the mounting preparation position, so the claw portions of the camera side bayonet member enter the outer recessed portions of the claw portions 6b, 6c, 6d of the bayonet member 6, The positioning pin 10 set on the mount member 8 is inserted into the slot 25a of the camera side bayonet member 25a.
7 (see FIG. 5), and the release pin 13 is pressed by the end surface of the bayonet member outside the camera side bayonet claw portion, and as a result, the pin 14 that locks the retaining ring 4 and the mount member 8 is pressed. is removed from the mount member, and the retaining ring 4, that is, the lens barrel body 1, which is integrally formed with the retaining ring 4, becomes rotatable with respect to the mount member 8.

On the other hand, the positioning pin 10 on the lens side is provided with a split groove 25a formed in the center of the bayonet claw 25a of the mount section of the camera body C, as shown in FIG. 4A and the enlarged view of FIG. 4B1.
', the mount member 8 is fitted to the lens barrel body 1.
When the lens barrel body 1 is rotated, the bayonet member 6 fixed to the rear end of the retaining ring 4
When the lens barrel body 1 is rotated, the bayonet pawls in the slotted groove 6a of the bayonet member 6 are deformed so that the clamping force is the largest, or
If a stopper for the bayonet member 6 is provided on the mount member 8, the tightening rotation of the lens barrel body 1 will be prevented from further rotation when a predetermined angle is reached, and the bayonet on the camera side will be stopped as shown in FIG. The claws 25a, 25b, 25c are tightly engaged with the lens-side bayonet claws 6d, 6b, 6c, and the lens body is mounted on the camera. At this time, the interlocking members 11a and 12a protruding from the rear wall member 8a of the mount member 8 do not move even when the mount member 8 rotates the lens barrel body 1 to attach the lens to the camera body. Since the fixed position is maintained, the interlocking members Cl and C2 (see Fig. 4A) on the camera side and the interlocking members are connected before the lens body is inserted into the camera and rotated, and even after the tightening and rotational operation. 11a and the drive lever 12a are arranged in a position where they can be engaged. When attaching the lens body to the camera side, the charge member 23 is rotated counterclockwise as shown in the sixth figure. As a result, the ring 11 and the cam ring 17 are set in the interlocking state by the engagement of the interlocking arms 11b and 17b' by the spring 18 and the stored force.

Therefore, when the aperture is manually set by rotating the preset ring 5, the arm 17b of the cam ring 17 is driven by the spring 19 via the arm 5a, and the cam ring 17 is rotated to a predetermined position. The ring 11 is moved in conjunction with the spring 18 via the cam ring 17 to adjust the interlocking member 11a to a position corresponding to the set value of the preset ring 5. As a result, at this time, the arm 20a of the C-shaped lever 20 is held at the aperture open position by the arm 12b of the lever 12, so that the aperture blades are held at the fully open position. Interlocking member 1 for transmitting preset aperture signal
1a and the camera-side interlocking member C1, a preset aperture signal is input to the camera-side exposure determining device, for example, TTL.
Shutter second time control for obtaining proper exposure is performed by known means based on the stored value of subject brightness information based on photometry and the ASA sensitivity information signal. Also, when the shutter release is performed, the interlocking member C is activated by the known camera automatic aperture 5 drive mechanism.
2 is driven counterclockwise from the position shown in FIG. 6 and reciprocates for a predetermined distance, so both driving members 12a are rotated counterclockwise. , Due to the counterclockwise rotation of the drive lever 12a, the interlocking arms 12b and 20a are disengaged and the cam ring 1 is released.
7 narrows down the aperture blades 22 from the fully open position by the force of the spring 19 until the pin 20b aligns with the cam 17a. After the exposure is completed, the drive lever 12a is also returned by the spring 26 due to the return movement of the interlocking member C2, and the arm 12b engages with the arm 20a again to fully open the aperture blades. In addition, preset ring 5
Automatic aperture adjustment (EE) shooting mode switching mark 5b on top
is placed adjacent to the minimum aperture value, and when set to this position, the camera's interlocking member C1 interlocks the movement amount corresponding to the appropriate aperture value based on the set shutter speed value ASA sensitivity and subject brightness information. It may also be configured to interlock with the member 11a. To remove the lens body from the camera, rotate the lens barrel body 1 in the opposite direction from when it is attached. The mount member 8 is fixed to the camera-side bayonet claw by the position regulating pin 10 and cannot be rotated. Therefore, when the lens barrel body 1 rotates, the retaining ring 4 rotates relative to the mount member 8. death,
The lens side bayonet claws 6b, 6c, and 6d are attached to the lens barrel body 1.
By approximately 600 degrees of rotation, the camera side bayonet claw 25a,
Leaves with 25b and 25c. During this time, the mount member 8 remains fixed, so the interlocking member 11a (5C1) and the drive lever 12a (5C2 remain in an interlocking relationship).
When the holding ring 4 is rotated clockwise during the removal operation, the charge member 23 is also rotated clockwise. Then, while engaging with the cam ring 17 and charging the spring 18, the cam ring 17 is forcibly returned to the initial position, and the aperture blades 22 are fully opened. And the arm 11 of the interlocking member 11
a follows the movement of the cam ring 17 and is pulled by a spring 18 and held in a predetermined position. Immediately after the above-mentioned bayonet member is removed, the retaining ring 4 is fitted into the fitting hole of the anti-theft pin 13 by the force of the biasing spring 15, so that the rotation of the lens barrel body 1 is prevented. Movement is prevented, and the lens body is removed from the camera side in this prone position (see Figure 3). In this way, when the lens body is removed from the camera side, the signal transmission interlocking member 11a is pushed through the through slot 9a end of the mount rear wall member 9 by the stored force of the spring 18, as shown in FIG. It is forcibly moved and set to the mounting preparation position until it engages with.

Further, the driving member 12a is always driven by the stored force of the spring 26.
It is arranged at the initial position of the through slot 9b. On the other hand,
As described above, the retaining ring 4 and the mount member 8 are connected to the locking pin 1.
By locking 4, it is locked in the camera side insertion position in advance.

Therefore, as described above, the position regulating pin 10 of the mount member 8
The lens body is removed while the relative positions of the lens body and the bayonet member 6 are locked at the mounting preparation position. In addition, in the down position with the lens body removed from the camera side, the interlocking member 11a11 drive lever 12a on the mount member 8 is adjusted to a position where it can engage with the camera side interlocking members Cl and C2 when inserted. With reference to the reference mark 4a on the retaining ring 4, the retaining ring 4, the bayonet member 6, and the mount member 8 are placed in a position where the bayonet engagement operation can be started without error when inserted into the camera side. Since the relative position with respect to the lens barrel is regulated, all you have to do is align the reference marks and rotate the lens barrel body to perform the mounting operation, without giving any consideration to the interlocking member on the camera side. Installation on the camera side is easily completed. In the above embodiment, the bayonet member 6 can be replaced with a screw member, and the bayonet members A, b, and c on the camera side can be formed as screws with female screws. In this case, It is preferable that the tightening operation is performed within one rotation of the lens barrel body.
As described above, the lens body can be attached or removed by operating any part of the lens barrel body, so it is possible to tighten or remove the lens body by grasping the outer part of the lens barrel body near the mounting surface. When the removal operation is performed, the operability is extremely good, and the operability is incomparably better than that of the above-mentioned conventional system in which four tightening rings are provided on the mounting surface.

Furthermore, when the lens body is removed, the interlocking member is forcibly moved to the mounting preparation position and locked, so that subsequent mounting and interlocking with the camera-side interlocking member can be easily performed.

7 to 9 show other modified examples in which the present invention is applied to an interchangeable lens for a single-lens reflex camera, and in addition to the above embodiment, the lens body is locked to the camera side when attached to the camera side. This figure shows an example equipped with a locking device.

In each figure, since most of the constituent members are the same as those in the above embodiment, corresponding members will be described with the same drawing numbers as in the above embodiment. 7 to 9 show only the lens body side in the down position when the lens body is attached to the camera side, and in each figure, 101 has its tip protruding from the lower position of the retaining ring 4. a release operation member held so as to be insertable; 10;
2, as shown in FIG. 9, one end of which is locked to the lens barrel body 1,
The bent portion at the other end is a spring member that engages with the locking step portion of the operating member 101 to apply a protruding biasing force to the operating member.

The operating member 101 is fitted into a guide groove 4A formed in the retaining ring 4 so as to be movable up and down, and its tip bent portion 101A is engaged with a locking groove 8A formed on the side wall surface of the mount member 8. It is configured. The locking groove 8A is engaged with the bent portion 101A of the operating member 101 by the force of the spring 102 at a position where the lens barrel body 1 is mounted and rotated and the rear bayonet member 6 has completely engaged with the camera side bayonet claw. Because it is configured to stop, when the lens barrel body 1 is rotated to attach the lens body on the camera side, when the attachment operation is completed, the groove 8A is automatically closed.
The operating member 101 locks inward, and rotation of the lens barrel body 1 is restricted. Due to this restriction, the rotation of the lens barrel body relative to the camera body is restricted through intermediate members, that is, the mount member 8 and the position restriction pin 10, and the rotation is completely locked, resulting in an accidental rotation operation. This will eliminate accidents such as detachment from the camera. To remove the lens from the camera side, push the operating member 101 upward to disengage the groove 8A and the tip bent portion 101A, and the lens barrel body 1 can freely rotate relative to the mount member 8. Therefore, as described in the above embodiment, the lens barrel main body 1 can be removed by rotating in the opposite direction to the direction in which it is mounted.

In each of the above embodiments, the position regulating pin 10 is provided on the mount member 8, and the engaging groove 25a of the camera side bayonet claw is provided.
Although an example has been described in which the rotation of the mount member 8 is restricted by locking with the mount member 1, it is not necessarily necessary to restrict the rotation and lock the position restriction pin 10, for example, by providing the position restriction pin 10 on the rear wall member 9 and attaching it to the camera. When inserting the lens body into the side, rotate the mount member until it is aligned with the stopper member on the camera side, and only when both are aligned, the interlocking members on the lens side and camera side are set to the engaging position. In some cases, it is also possible to use an interlocking member on the lens side or camera side instead of the position regulating pin.

In this case, when removing the lens, it goes without saying that the rotation of the mount member must be restricted at the bayonet member detached position. Needless to say, it may be provided on the side, that is, on the side to be worn. Furthermore, in each of the above embodiments, it has been explained that the lens-side interlocking member and the camera-side interlocking member are engaged after the lens body is inserted, but the term "engagement" does not necessarily mean that they are in close contact with each other, and This term is used to include engagement, that is, interlocking, when one of the two sides moves. 〇Figures 10 and 11 show other modified embodiments of the present invention, and are different from the above embodiments. The difference is that instead of being tightened by the lens barrel body, the bayonet member is tightened by an aperture ring or other tightening ring located outside the mounting surface or its vicinity. It is composed of For convenience of explanation, members corresponding to those in the above embodiment will be described with the same numbers.

FIG. 10 shows the bayonet member 6 in conjunction with the aperture ring 5.
In the figure, 5A, 5B, and 5C are inner peripheral protrusion forming portions of the ring, and 61
1 is a mount member fitting part in which the inner part of the lens barrel of the retaining ring 4 in the above-mentioned embodiment is integrally formed with the bayonet member 6, and the bayonet member is held rotatably by being fitted into the retaining ring 4. The configuration will be as follows.

Reference numeral 62 indicates an arm-up linking arm formed integrally with the fitting portion 61; 200
A cam ring corresponds to the cam ring 17 in the above embodiment, and S1 and S2 indicate springs suspended between the cam ring 200 and the protruding portions 5A and 5B, respectively.

In this configuration, when the aperture ring 5 is operated within the adjusted aperture value range, the protruding portion 5C and the bent portion of the cam ring 200 are engaged by the force of the spring S2 and set at a predetermined position. On the other hand, when the ring 5 is rotated beyond the adjustment range when attaching or removing the lens body, the protrusion 5
A or 5B engages with the interlocking arm 62 and rotates the bayonet member 6 to tighten, remove, and rotate the bayonet member 6. At this time, the preset cam ring 200 has springs S1 to S2.
Since the amount of rotation during tightening and removal of the aperture ring 5 is absorbed by the charge of the aperture ring 5, it only follows and is unrelated to this operation.In place of the aperture ring 5, as shown in Fig. 11, A special tightening ring 300 is protruded from the tip of the lens body, and a bayonet member 6 and connection members 301 and 30 in the lens barrel are attached.
A similar effect can be expected even when connected by 2.

Although FIGS. 10 and 11 both illustrate modified examples of the tightening/removal operation member, the locking means is, for example, a locking member fixed to the mount member 6 on the connecting member 301 as shown in FIG. 11. Drilling hole 301 into which the tip of the claw 63 fits
a, and a release operation button 301c supported by a holding piece 301b screwed onto the connecting member 201. When the bayonet member 6 reaches the final tightening position, the locking claw 63 is fitted into the hole 301a. At the same time, the mount member 6 and the tightening ring may be locked together.
In the case of Figures 10 and 11, the lens barrel body is not restricted from rotating relative to the camera body, so when operating the distance ring, aperture ring, etc., the lens barrel body rotates, resulting in poor operability, but the mount member This problem can be solved by installing a somewhat strong click device between the camera and the retaining ring, and whether the camera body is held horizontally or vertically, the lens barrel body can be rotated by an appropriate amount depending on the position in which the camera body is held. When clicked, it is fixed to the lens barrel at an appropriate position and can be operated at a convenient scale position at all times. In each of the above embodiments, an example has been described in which the release pin 13 is automatically pressed to release the locking pin 14 when it is attached to the side to be attached, but the release pin 13 is similar to the release operation member 101. It is also possible to perform the release operation manually from the outside.

Further, in each of the above embodiments, an interchangeable lens is particularly exemplified as an accessory device, and a camera side is exemplified as an attached side.
In addition to standard telephoto, wide-angle, and zoom interchangeable lenses, it is also possible to consider an intermediate ring used with interchangeable lenses as an accessory device, and to cite other interchangeable lenses as an example of the configuration as the attached side. It is also possible to configure the camera body as an attached side and a motor winding device for film and shutter winding as an attached device, or to configure a battery case unit as an attached device and a motor winding device as an attached device. The idea of the present invention can be applied to various accessory devices that can be attached to the attachment target side, without being limited by the drawings of the above-described embodiments. As described above, in the present invention, since the rotation of the mounting means having the mount member is restricted during mounting, the interlocking member can interlock with high accuracy on both the mounting side and the mounted side, and When removed from the side, the mounting means and the bayonet, screw, etc. are in the mounting preparation position, so
The mounting operation is extremely easy, and at the same time, in the mounting preparation position,
Since each interlocking member is regulated to a fixed position, the ease of mounting is improved.

In addition, since it requires a restricting structure for attachment on the side to be attached, it has the advantage of being extremely versatile and is extremely useful. In particular, the present invention has the essential feature that the operating means for operating the tightening means, such as the bayonet clamp, can be provided at a position outside the range near the mounting surface when tightening or removing the mounting. Since it can be tightened or removed at a desired position, it has excellent operability and is extremely useful when applied to various accessory devices.

[Brief explanation of the drawing]

Figures 1 to 6 show an example in which the present invention is applied to an interchangeable lens for a single-lens reflex camera as an accessory. Figure 1 is a side view of the interchangeable lens, and Figure 2 is a rear view of the interchangeable lens. Figure 3 is a configuration diagram of the inside of the lens barrel of the interchangeable lens in the prone position after being removed from the camera body, Figure 4A is a side sectional view when the lens shown in Figure 1 is attached to the camera body side, Figure 4B is an enlarged view of the main parts of the side section shown in Figure 4A, Figure 5 is a rear rear view of the lens shown in Figure 4, and Figure 6 is the internal configuration of the lens barrel of the interchangeable lens in the installed state as shown in Figure 4. 7 to 9 show still other modifications in which the present invention is applied to an interchangeable lens for a single-lens reflex camera, and FIG. 7 is a side view of the interchangeable lens;
FIG. 8 is a rear view of the interchangeable lens, FIG. 9 is a perspective view of essential parts of the lens shown in FIG. 7, and FIGS. 10 and 11 show other modifications when the present invention is further applied to an interchangeable lens. FIG. 10 is a perspective view of the main part of the interchangeable lens, and FIG. 11 is a perspective view of the main part of the interchangeable lens as another modification. 1...Luns lens barrel body, 2...Distance ring, 4...Retaining ring, 6...Bayonet member, 8...Mount member , 10...
Position regulation pin, 13...Latch release pin, 14.
...Lock pin.

Claims (1)

[Claims] 1. A mounting means having a reference mounting position with the camera and attached to the fixed position of the camera is held so as to be rotatable relative to the accessory structure, and a mounting means on the camera side is attached to the camera side mounting part of the structure. A clamping member coupled to the clamping member is provided, and a locking member is provided to prevent relative rotation between the component and the mounting means, and the accessory-side clamping member and the camera-side clamping member are coupled to each other. When the structure is rotated to a predetermined position with respect to the mounting means in a direction in which the structure is released, the locking member locks the structure and the mounting means to prevent the relative rotation. Features a mounting device for camera accessories.