JPH0643787Y2 - Camera with built-in release cable - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION "Technical Field" The present invention relates to a camera having a device with a built-in release cable.

“Prior art and its problems” In recent years, cameras, especially lens shutter type cameras,
Since the release switch has been changed to an electric switch, the release cable that could be connected conventionally cannot be connected. That is, there is no existing lens shutter type camera having a structure in which a release cable can be used.

However, it is a well-known fact that a release cable is advantageous when it is desired to use a lens shutter type camera with a tripod, or when it is desired to release the shutter without camera shake.

[Object of the Invention] The present invention has an object to provide a camera having a release cable that is an electric switch, and in which the release cable can be easily pulled out according to the photographer's need.

[Outline of the Invention] In a camera in which the release switch is an electric switch, the present invention can easily provide the switch at the tip of the cable, and if the cable can be housed in the camera, the release switch is provided. It was completed based on the idea that a camera could be obtained.

The present invention provides a release cable having a release switch at one free end, and fixes the other end of the release cable to a take-up reel that winds the release cable. In the state where the release cable is wound on the take-up reel, a rotary contact mechanism that constantly electrically connects the release switch and the shutter control circuit regardless of the rotating position of the take-up reel between the fixed part of A release switch holding part for holding the release switch in the camera body is provided.

[Embodiment of the Invention] Hereinafter, the present invention will be described with reference to illustrated embodiments.

At the position where the release button 12 is provided in the camera body 11, a facing mounting wall 13 is formed so as to hang down, and a reel shaft 14 is rotatably supported across the facing mounting wall 13. Reel axis
One end of 14 is a spring holding reel 16 holding a spiral spring 15.
The holding reel 16 has the starting end of the spiral spring 15 fixed and fixed to the holding reel 16. The end of the spiral spring 15 is hooked on a spring hooking pin 17 projecting from one of the opposing mounting walls 13,
The reel shaft 14 is rotationally biased.

The reel shaft 14 includes a take-up reel 18 that rotates integrally with the reel shaft 14.
The release cable 19 is wound around the circumferential groove of the take-up reel 18. The release cable 19 has its winding start end fixed to the winding reel 18 and its winding end connected to a release button (release switch) 11. The take-up reel 18 is rotationally biased in the take-up direction of the release cable 19 by the spiral spring 15.

A rotary contact that electrically connects the release switch 11 and the shutter control circuit 27 is always provided between the take-up reel 18 and a fixed portion in the camera body 11, regardless of the rotational position of the take-up reel 18. A mechanism is provided. That is, the winding start end of the release cable 19 on the fixed side of the take-up reel 18 is
The conductor portion is guided to the shaft space 20 in the take-up reel 18 and connected to a plurality of contacts (brushes) 21 provided on one surface of the take-up reel 18. The contact points 21 are in constant contact with the plurality of annular contact pieces 23 formed on the relay board 22 in a non-conductive state. Therefore, contact 21
The ring contact piece 23 and the annular contact piece 23 are always in conduction at an arbitrary position of rotation of the take-up reel 18. One end of the relay board 22 is fixed to the camera body 11 and is fixed to a mounting plate 24 that hangs down, and the reel shaft 14 is inserted into a play hole 25 formed in the relay board 22 and the mounting plate 24.
Has been inserted. Each of the annular contact pieces 23 is connected to a shutter control circuit 27 in the camera body 11 via a lead wire 26.

Since the rewinding rotation of the take-up reel 18 by the spiral spring 15 is restricted, the sliding operation lever 30 is provided on one of the opposing mounting walls 13.
Are slidably supported. This sliding operation lever 30
Slides around a swing shaft 31 located on the reel shaft 14 and pivotally attached to the opposing mounting wall 13. An escape hole 32 is formed in the lower portion of the swing operation lever 30, and the reel shaft is provided in this escape hole 32.
14 has been inserted. This escape hole 32 is a swing operation lever.
It allows the rocking of 30 and controls the rocking angle. A stopper pin 33 capable of interfering with the inner peripheral flange 18a of the take-up reel 18 is provided at a position eccentric to the upper part of the swing shaft 31. This stopper pin 33
By swinging the swing control lever 30.
It moves to an interference position and a non-interference position with respect to a, and restricts the rewinding rotation of the take-up reel 18 when it is in an interference position with the inner peripheral flange 18a. This stopper pin 33
Is constantly urged by the tension spring 34 to the interference position of the inner peripheral flange 18a. Further, the tip of the operation portion 35 on the upper portion of the swing operation lever 30 projects from the hole of the case.

The release button 12 has a switch on the camera body 11
The camera body 1 has an elastic leg 12a protruding upward.
It can be attached to and detached from the release button storage hole 11b of 1.

In the camera with built-in release cable having the above structure, the elastic leg portion 12a of the release button 12 is mounted in the storage hole 1b of the camera body 11, and the release cable 19 is wound around the take-up reel 18 and stored in the camera body 11. There is. In this state, it is possible to take a picture without using the release cable 19 as an ordinary camera with the release button 12 fixed (see FIG. 5A).

When the user wants to release the shutter using the release cable 19, first, a force in the pulling direction is applied to the release button 12 to release the engagement of the elastic leg portion 12a with the storage hole 11b, and the release button 12 is detached from the camera body 11. . Next, when a tensile force is applied to the release cable 19, the inner peripheral flange 18a
However, since it tries to push the stopper pin 33 interfering with this against the spring force of the tension spring 34 in the non-interference direction, the take-up reel 18 pulls out and rotates against the spring force of the spiral spring 15. Rotate in the direction. At this time, the contact point 21 is an annular contact piece 23.
Since it is in sliding contact with the shutter control circuit 27, the release cable 19 is always in conduction with the shutter control circuit 27. When the release cable 19 is pulled out by the required length and the pulling force on the release cable 19 is released, the take-up reel 18 tries to rotate in the take-up rotation direction by the spring force of the spiral spring 15. However, since the stopper pin 33 is pressed against the inner peripheral flange 18a by the tension spring 34, the take-up reel 1
For 8, the rotation in the same direction is restricted and it stops. Therefore, the release cable 19 is not wound onto the take-up reel 18 but is locked with the required pull-out length (sixth).
(See Figure B). If you release the release button 12 in this state,
This is convenient when using a tripod and can prevent camera shake.

To rewind the release cable 19 to the take-up reel 18,
The operation portion 35 of the swing operation lever 30 protruding from the camera body 11 may be swing-operated against the spring force of the tension spring 34. When the operation portion 35 is swung, the stopper pin 33 is in the non-interference position with respect to the inner peripheral flange 18a (the position of the imaginary line in FIG. 4)
Then, the rotation restriction of the take-up reel 18 is released. As a result, the take-up reel 18 rotates in the take-up rotation direction due to the spring force of the spiral spring 15, and the release cable 19 is wound around the concave groove. Then, when the operation of the operation portion 35 is released when the release cable 19 is rewound, the stopper pin 33 is pressed again against the inner peripheral flange 18a by the tension spring 34, and the rotation of the take-up reel 18 is stopped. Finally, if the release button 12 is attached to the camera body 11, the release cable 19 is built in the camera body 11 and can be used as a normal camera.

[Advantage of the Invention] As described above, according to the present invention, the release cable having the release switch is wound around the take-up reel and can be pulled out, and the release switch and the shutter control circuit are fixed to the take-up reel and the camera body. Since it is always electrically connected by the rotating contact mechanism provided between the
Remote release operation can be performed with the release cable pulled out to any position. For this reason, at times, it is possible to easily perform shooting such as tripod shooting in which camera shake is disliked. On the other hand, when the release cable is wound on the take-up reel, the release switch is held by the holding portion of the camera body, so that a normal release operation can be performed. Furthermore, since the release cable is fixed to the take-up reel, there is no risk of loss.

[Brief description of drawings]

FIG. 1 is a sectional view of the device of the present invention, FIG. 2 is a perspective view of a take-up reel and a swing operation lever, FIG. 3 is a perspective view of a relay board and the surroundings of the board, and FIG. 4 is a stopper pin for the take-up reel. FIG. 5 is a schematic view showing the operating state of FIG. 5, FIG. 5 is a front view of the camera showing the state of housing the release cable, and FIG. 6 is a view similar to FIG. 5 showing the state of pulling out the release cable. Camera body 11 …… Camera body, 12 …… Release button (release switch), 13 …… Counter mounting wall, 14 …… Reel shaft, 15 …… Spiral spring, 16 …… Holding reel, 18 ……
Take-up reel, 18a ... Inner peripheral flange, 19 ... Release cable, 21 ... Contact (brush), 22 ... Relay board, 23
…… Ring contact piece, 27 …… Shutter control circuit, 30 …… Swing operation lever, 31 …… Swing shaft, 32 …… Escape hole, 33 …… Stopper pin, 34 …… Tension spring, 35 …… Operation part.

Claims (1)

[Scope of utility model registration request] 1. A release cable having an electric release switch at one free end thereof; a take-up reel having the other end of the release cable fixed and capable of winding the release cable; the take-up reel and a camera body. A rotary contact mechanism that is provided between the shutter and the fixed portion of the take-up reel and always electrically connects the release switch and the shutter control circuit regardless of the rotation position of the take-up reel; A camera with a built-in release cable, comprising: a release switch holding section for holding the release switch in the camera body in the closed state.