JPS6131310Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a front cover opening/closing device for a camera in which a lens portion is extended or retracted by a sliding mechanism or the like.

In conventional spring cameras, the lens is mainly extended and retracted by operating the front cover using a spring and a handle. In most cases, the front cover is hinged to the lower end of the camera body, and the front cover is pivoted around this point to open the front cover toward the front of the camera. When the front cover is stored in the camera body, there is almost nothing that covers even the viewfinder part. However, in recent years, there has been a trend to shield even the viewfinder part in order to protect the lenses and optical components of the viewfinder part and to simplify handling. On the other hand, one trend is that recent cameras are increasingly using short-focus lenses. In this case, in the former case, the front cover is naturally elongated, and in the latter case, since it is a wide-angle lens, objects at the near point come into the field of view and are photographed. If the lid is attached to the camera body in the conventional manner, a portion of the front lid will be photographed, causing inconvenience.

The present invention was developed to solve this problem; when the front cover is retracted into the camera body, the entire front of the camera is shielded, but when the front cover is opened to the front of the camera during shooting, , the lower end of the front cover was moved to the bottom of the camera body so that the front cover would not enter the lens field of view even when shooting with a short throw lens.

An embodiment of the present invention will be described below with reference to the accompanying drawings.
Figure 1A is a side view of a spring camera equipped with a front cover based on the present invention when the front cover is opened, C is a side view when the front cover is retracted into the camera body, and B is a side view illustrating the state in the middle. be. 1 is a camera body, 2 is a photographing lens, 3 is a lens shutter, and the lens portion 2 is attached to the camera body 1 with a bellows 4. 5
1 is a camera front cover, which is configured to completely cover the front of the camera body 1, as shown in FIG. 1C.
Reference numeral 6 denotes a sash mechanism, which is composed of a combination of three sashes: a first sash 6a, a second sash 6b, and a third sash 6c. The lower end of the first guide 6a is rotatably supported by a shaft 7 at a suitable position on the camera body 1, and a guide pin 8 is provided at its upper end. It moves up and down in response to the movement of the lens or front lid. The second task guide 6b has its lower end rotatably pivoted to the lower end of the side wall of the shutter 3, and has a guide pin 1 at its upper end.
1 is provided, and moves up and down in a long groove 12 provided at a suitable position in the camera body 1, similar to the guide pin 8. The two sashes are rotatably connected at their intermediate point 13.

Furthermore, the upper end of the second spool 6b is formed with an extension 6b' extending toward the inside of the camera body, and its tip is rotatably coupled 14 to the upper end of a third spool 6c, which will be described later. The third sash 6c is the sash 6a,
6b, and is used to move in accordance with the movement of both the above-mentioned handles, and to move the lower end 5a of the front cover 5 so as to draw it into the bottom of the camera body 1.
Furthermore, the lower end of the third handle 6c is rotatably coupled 15 to the upper side 17b end of a front cover opening/closing support arm 17, which will be described later, inside the camera body 1. The support arm 17 is integrally bent into a fold-back shape by an upper side 17b and a lower side 17a, and the bending point is placed inside the camera body 1 inwardly from the coupling 15. Pivot support 1 for rotation in the appropriate position
6, and the lower side 17a is joined 18 to a proper position of the front lid 5 at its tip. Therefore, the front cover opening/closing support arm 17 has its upper side 17b end connected 15 to the lower end of the third handle 6c within the camera body 1, and
Its lower side 17a is coupled 18 to the front cover 5, and its bending point is pivoted 16 to the camera body 1 at the innermost part of the camera body 1. Reference numeral 19 denotes a front cover opening/closing auxiliary link, one end of which is rotatably attached to a pivot support 21 at a suitable location on the bottom of the camera body 1 via a spring 20.
The other end is rotatably coupled 22 to the lower side 5a of the front cover 5.

Now, in FIG. 1C, when the front lid opening/closing means such as a hook (not shown) is removed, the front lid 5 is opened by the spring 20 and the spring applied to the second handle 6b (not shown). When the door is opened, the door rotates counterclockwise around the pivot support 16 and automatically tilts forward to open the door. At this time, the lower side 17a of the supporting arm also rotates, and therefore the upper side 17b of the supporting arm integrated with the arm 17a.
also rotates in the same direction, thus moving the third handle 6c connected at 15 downward (FIG. 1B). At the same time, the second swivel 6b coupled 14 to the third swivel 6c moves its lower end forward by being lowered into the long groove 12 by its guide pin 11. Accordingly, the lens shutter section 3 on which the second handle 6b is pivoted 10 is extended forward, and at the same time the guide pin 8 is lowered in the long groove 9 provided in the side wall of the shutter section 3, and the first guide pin 6a is moved forward. The lens part 2 is moved forward in conjunction with the 2-task 6b (B
figure). At this time, the lower end portion 5a of the front lid 5 is
Rotate counterclockwise around the camera body 1.
will move to the bottom of the

Furthermore, the front cover 5 continues to open at a predetermined angle, for example.
When the front cover 5 is rotated 90 degrees, the opening of the front cover 5 is completed, and its lower end 5a reaches the bottom of the camera body 1, and at the same time, the extension of the lens unit 2 is completed and the camera is ready to take a picture. At this time, since the auxiliary link 19 is rotatably coupled 21 via the spring 20, the front cover 5 is held in close contact with the bottom of the camera body 1 by the elasticity of the spring 20.

In order to store the front cover in the camera body after photographing is completed, it is sufficient to operate the front cover in the opposite direction to the above-mentioned opening operation.

Since the present invention has the above-described configuration, it has the following effects.

(1) Since the front cover of the camera can shield not only the lens but also the viewfinder section when the camera is stored, these optical components can be completely protected and the camera can be handled extremely easily.

(2) When the front cover is opened and ready for shooting, the lower end of the front cover can be pulled into the bottom of the camera body and moved, so even when using a short throw lens, the front cover cannot be captured. There is no such danger.

(3) An auxiliary link is constructed between the bottom of the camera body and the front cover via a spring, so when the front cover is fully opened, the lower end of the front cover can be brought into close contact with the bottom of the camera body, making it easy to use when in use. The front lid never rattles.

As described above, the configuration of the present invention is simple and the number of additional parts can be reduced to a small number, so that mass production is possible and it is practically effective.

[Brief explanation of drawings]

Fig. 1A is a side view of a camera equipped with a front cover based on the present invention when the front cover is opened, C is a side view when the front cover is retracted into the camera body, and B is a side view showing an intermediate state. be. 1...Camera body, 2...Lens, 3...Shutter part, 5...Front cover, 5a...Front cover lower end, 6
...Tasuki part, 6a...First sash, 6b...Second sash, 6b'...Extension part, 6c...Third sash, 7, 10, 16, 21...Spindle support, 8, 11...
...Guide pin, 9, 12...Long groove, 17...Support arm, 17a, 17b...Lower and upper sides thereof, 14,
15, 18, 22...Connection, 19...Auxiliary link, 20...Spring.

Claims (1)

[Scope of utility model registration request] In a camera that extends and retracts the lens using a sliding mechanism, the bending point of the fold-back-shaped front cover opening/closing device support arm is rotatably supported at a key point within the camera body, and the lower end of the support arm is rotatably supported. is pivotally supported inside the front lid, and its upper end is rotatably connected to another sling that is linked to the sling mechanism, so that when the front lid is opened, the front lid moves to the bottom of the camera body. A front lid opening/closing device for a camera, characterized in that the front lid shields the lens and viewfinder portion of the camera when the front lid is retracted.