JPS58154831A - Signal transfer device of photographic equipment or accessory - Google Patents

Abstract

PURPOSE:To prevent a contact part from sliding unnecessarily when an accessory is attached by providing the electric signal transfer members of a photographic equipment or the accessory where the transfer members do not impede the operation of an attaching means. CONSTITUTION:An interchangeable lens has a fixed lens barrel 1 and a mount member 2; the fixed lens barrel 1 rotates relatively to the mount member 2 and a coupling means 4 such as a bayonet mount is provided at one end of the fixed lens barrel 1. On the outer circumferential surface of the fixed lens barrel 1, a holding member 6 for electric signal transfer members is projected and the signal transfer members 8a, 8b... are provided concentrically about an optical axis O1-O2 at positions other than where loading means operation is relative to transmit an automatic focusing signal AF on a camera side such as a power voltage signal and maximum open aperture value information to the lens side.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for transmitting electrical signals between accessories used in equipment.

Taking the case of a photographic system machine, such as a single-lens reflex camera and an interchangeable lens, each element in the interchangeable lens, such as the aperture member, focusing lens, various filters, shutter, etc., is controlled by No. 4A from the camera side. When considering a system that receives and controls electrical signals from each element and transmits them to the camera side, technical problems arise in the electrical signal transmission device between the camera and the exchange lens.

As for the signal transmission device known to Junbei, the electrical signal contacts are arranged on the mount surface (part) of the camera and the lens, and when the lens is attached to the camera, there is a connection between the camera side and the lens side. Each corresponding electrical signal contact or terminal is configured to contact each other.

The signal contacts in a device having such a configuration are either held at a predetermined position on the camera side or the lens side, or are biased by a spring or the like to ensure mutual continuity.

In such a conventional position, the signal contacts are installed inside the mount or on the mount, and there is a large space constraint inside the mount, and the relative rotation of the mount image and the camera body is difficult when mounting the mount image. The contact will slide with the mount image over the entire corner, and if you touch the camera body or the screw that attaches the lens KMiL to the mount ring, the contact will be electrically damaged due to wear and oil resistance. There were problems such as incomplete conduction.

There were also limitations in the contacts IIL provided inside the mount and on the mount.

The first purpose of the present invention is to prevent the contacts from sliding more than necessary on the WA that is attached to camera equipment such as accessories such as interchangeable lenses, prevent oil from adhering to the contacts, and prevent abrasion. , a signal transmission device t that performs complete electrical continuity.
- It is about providing.

A second object of the present invention is to mount a plurality of electrical signal transmission members of at least one of accessories or photographic equipment to the outside or to the outside.
By providing it at 14 m, internal reflection due to space constraints of the electrical signal transmission member and MV are alleviated.

Next, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1A shows the mounting means (external to the mount) for the interchangeable lens and an electrical signal transmission device, and FIG. 1B shows the mounting middle stage on the camera side to which the interchangeable lens is mounted and the electrical signal transmission device.

In the figure, the reference numeral indicates an interchangeable lens, and the interchangeable lens L
has an identification lens barrel 1 and a runt member 2, the fixed mmi is configured to be able to rotate once relative to the mount member 2, and a bayonet mount coupling means 4 is attached to one end of the (support) fixed lens barrel 1.
v @ getting.

6 is 1. ! Electricity 1i on the interchangeable lens side protruding from the outer periphery of jV mirror 1! This is the holding part (holding container) of the signal transmission member.

The electrical signal transmission members 8a@8b, 8c, fist... are used to transmit power voltage signals, maximum aperture value information, corrected aperture value information for each interchangeable lens, and camera side autofocus l14# to the lens side. V signals, etc., and are connected to a plurality of 25, focusing motors 26, etc. via signal lines 11, 12, Ii, etc.

10 is the camera body, and 12 is the camera bayonet member. 1
Reference numeral 4 indicates a camera-side electrical signal transmission device, in which the camera-side electrical signal transmission members 14a, 14b, and 14c are arranged in the same number as the lens-side signal transmission members 8a@8b, . . . .

As shown in FIG. 2, the electrical signal transmission member on the camera side is provided in the housing hole 16a-
16b-16C----, and the energizing spring 18a/1
8b, 18C, etc. are always energized in one direction.

20 is the camera side signal transmission member 14a, 14b, 14
It is a preservation member 2 that maintains c...φ.
0 is camera cost signal transmission member 11@14b/14C...
- The tip of the opening 14A protrudes to the outside. A spring 22 is falsely installed between one end 20s+ of the retaining member 20 and the main body of the tensioning member, and the retaining S member 20 is biased KxK so as to cover the opening 14A. There is.

248, 24b, 24C, . . . are connected to the signal transmission members 14a, 14b, 14C, . . . on the camera side.Next, the operation of the above embodiment will be explained.

In the state before the interchangeable lens L is attached to the camera side, the protective SLS material 20 is biased by the spring 22 to the opening 14 of the plate.
In addition to blocking A, the signal transmission member 14 on the camera side
1, 14b, 14C-... are the biasing springs 18a, 1
The storage hole 16a- resists the spring force of 8b, 18c...
16b/16c@... are pushed inside. (Therefore, the signal transmission member can be protected from dust, water droplets, etc.)
Next, replace the interchangeable lens Llii (attach it to the camera. Insert the position regulating bottle 2a installed on the mount #2 on the lens side into the notch 1B12aK provided on the Macunt member 12 on the camera side, and insert the bayonet between the lens side and the camera side. s# and rotates the lens-side fixed lens barrel 11 to attach the lens to the camera.IIK of this attachment operation, one end 6a of the holding portion 6 of the signal transmission member on the lens side is connected to one end of the maintenance member 20. This holding WA6 is connected to the fixed lens barrel 1, and as the i6 east fixed lens barrel 1 rotates [as shown in FIG. @1Ill around the optical axis. Therefore, as shown in FIG. 20a, and the spring 22 maintains it according to rotation.
The opening 1114t-fights against the force of the force.

By this movement of the protective material 20, the signal transmission members 141, 14b, 14C, etc. on the camera side are sequentially placed in positions where they can be electrically connected to the signal transmission members 8a, 8b, 8C, etc. on the lens side. At the same time as the lens L is attached to the camera two, the electric signal transmission member II of the lens side and camera side partner is moved.
The threading is completed.

This maintains electrical continuity between the lens L and the camera.
Electric signals are exchanged between the camera side and the lens side by the signal transmission members on the camera side and the lens side.

As described above, the present invention provides signal transmission members 14a, 14b...
... is arranged so that it can move in a predetermined direction, and
The signal transmission member is configured to move sequentially in the predetermined direction with minute sliding movements in response to the operation of wearing the interchangeable lens, and to connect with the signal transmission member on the other side, unlike the conventional signal transmission member. There is no sliding movement in the mount portion over the entire relative rotation angle between the lens barrel and the camera body, and the device can be operated with the minimum necessary amount of sliding movement.

Furthermore, the present invention prevents and releases the movement of the signal transmitting member on the camera side in a predetermined direction in conjunction with the opening/closing operation of the retaining member, so that the movement of the signal transmitting member in a predetermined direction is specially controlled. It has become possible to dispose the lens near the camera or lens mounting means without using other members or structures.

In the above embodiment, the above 1! The inner surface of the iWA material 20 is in contact with the signal transmission members 14m, 14b, 14C, and 11 at 1tK, and is also in sliding contact with the lenses as silver coating and detachment t. Therefore, by utilizing this, a brush or cloth or the like can be attached to the inner surface to clean the signal transmission member.

In the above embodiment, when the lens is detached from the camera, the lens is detached from the camera by moving the lens in the direction K11- opposite to the mounting direction. Opening 1114A by
V moves in the closing direction, and at the same time the signal transmission member 1 on the camera side
4i, 14b, 14C11 fist... each spring 181, 18
b. 18C... against the paneka, 7 said storage hole 1
6 a * 16 b * 16 ce... Since the function of retracting the signal transmission member is achieved, a special member for retracting the signal transmission member is not required.

In the above embodiment, 1 was explained as a signal transmission member on the camera side, but the polarized transmission member 4II material T spring 1 on the lens side biases the optical axis in 5 directions, and the protection III material 20 is used as the signal transmission member. :
A may be provided.

Although the present invention has been explained by exemplifying the case of a camera or an interchangeable lens, it can also be applied to a video camera and its interchangeable lens, or other photographic equipment and accessories such as an east strobe or a filter device, and can be applied to the equipment itself. The reliability of electrical connections between accessories can be improved.

Furthermore, in the above-mentioned embodiment of the interchangeable lens L, the holding member 6 of the electric signal transmission members 8a, 8b, 8C on the lens side
is arranged so as to protrude above the outer wall of the fixed lens barrel 1, thereby making it possible to avoid placing electrical signal transmission members on the narrow mounting surface, and making it possible to send and receive a large number of electrical signals. did it.

[Brief explanation of the drawing]

Figures 1 and 2 show an example in which an embodiment of the present invention is coupled to a camera and an interchangeable lens. Figure 1A is a perspective view of the main parts of the interchangeable lens, and Figure 1B is a perspective view of the main parts of the camera. . #! Figure 2 is an explanatory diagram of the mounting operation of the camera.

Claims (2)

[Claims] (1) In a signal transmission device having an electric signal transmission member that transmits or sends/receives electrical signals between the photographic equipment and accessories, A photographic device, characterized in that it is provided with a mounting means that connects the photographic device while maintaining the desired positional adjustment, and the electric signal transmission member of the photographic device and its accessories is provided at a position other than the part involved in the action of the mounting means. Accessory signal transmission device. (2) The accessory attachment device has a cylindrical shape that includes a Macint member that is attached to a predetermined position of the photographing equipment, and a coupling means that rotates relative to the Macintosh material and is coupled to the coupling means on the shooting *S side. in the main body, and the electrical signal transmission member is placed on the outer periphery of the cylindrical main body.
4. A signal transmitting device for a photographing device or an accessory of the machine as set forth in claim (1), characterized in that a plurality of signal transmitting devices for a photographing device or an accessory of the machine as set forth in claim (1) are configured to be held concentrically in a plurality of storage devices.