JPS6228451B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a waterproof camera having a hinged back cover.

Conventionally, an auxiliary back cover is connected to the hinged back cover via an elastic member, and when the hinged back cover is closed, the elastic waterproof member is connected to the camera body and the hinged back cover by the biasing force of the elastic member. Japanese Utility Model Publication No. 52-45217 discloses a waterproof camera that is crushed by a constant force between the two. This technology can be praised for paving the way for the application of hinged camera backs to waterproof cameras. There are structural difficulties in constructing the lid. In other words, since the function of crushing the elastic waterproof member and the function of locking the back cover to the camera body are separated, on the one hand, the elastic force is applied between the hinged back cover and the auxiliary back cover, depending on each function. On the other hand, a back cover locking device must be provided on the side edge of the camera. This has the drawback of increasing the number of parts and increasing the size of the structure.

The purpose of the present invention is to construct a hinged case back without using a conventional double structure, integrate the crushing function and locking function, and prevent the case back from being opened inadvertently. An object of the present invention is to provide a waterproof camera having a structure capable of preventing the above-mentioned problems.

FIG. 1 is a perspective view showing an embodiment of the present invention.
In addition, FIG. 2 is a side view of the embodiment shown in FIG.
4 and 5 show cross-sectional views taken along arrows A, B, and C in FIG. 2, respectively. In the figure, camera body 3
An auxiliary hinge 20 is provided at the free end of the hinged back cover 6, which is pivotally supported on one side edge of the back cover. The auxiliary hinge 20 has a tapered portion 2
A locking pin 21 having a support portion 1a and a support portion 21b is implanted.

A protrusion 22 is provided on the other end 3 of the camera body.
a, 22b are provided. The locking plate 23 has long guide grooves 23a, 23b and bent portions 23c, 23.
d, it has a locking groove 23e into which the locking pin 21 enters, and operating portions 23f and 23g. The spring 24 is placed between the protrusion 22a and the bent portion 23c, and the spring 25
are compressed and supported between the protrusion 22b and the bent portion 23d. These springs 24 and 25 have the effect of urging the locking plate 23 to the left in FIGS. 2 and 4.

The screw 26 is inserted into the hole 28a of the cover 28 and the long groove 23.
The screw 27 passes through the hole 28b of the cover 28 and the long groove 23b and is screwed into the camera body 3. In this way, the locking plate 23 has screws 26, 27 and long grooves 23a, 23.
b and can slide in the direction of the arrow in FIG. Of course, this locking plate 23 is normally biased toward the left in FIGS. 2 and 4 by springs 24 and 25. The cover 28 has a locking groove 23
A hole 28c is formed facing the hole 28c, into which the locking pin 21 is pushed when the back cover 6 is closed.

Now, in order to close the back cover 6, the auxiliary hinge 20 is rotated clockwise in FIG. 3, and the locking pin 21 is pushed into the locking groove 23e through the hole 28c.
Then, the tapered portion 21a of the pin 21 is inserted into the locking groove 2.
The tapered portion 21a abuts against the end of the locking plate 23 forming the locking plate 23 by the pushing operation.
2 and 3 to the right against the springs 24 and 25. When the tapered portion 21a enters the back side of the locking plate 23 near the end of the pushing operation, the locking plate 23 is held up by the springs 24, 25.
Due to the urging force, it slides to the left until it comes into contact with the support column 21b, and engages with the lower surface of the tapered portion 21a. When the locking plate 23 comes into contact with the pillar 21b, the back cover 6 receives the urging force of the springs 24 and 25 via the pin 21 and the auxiliary hinge 20. This biasing force is a force that presses against the waterproof gasket 10.

Note that in order to open the back cover 6, the operation parts 23f, 2
3g manually to the right in FIG. 2, and in this state rotate the auxiliary hinge 20 counterclockwise to pull out the pin 21 from the grooves 23e and 28c.

To summarize: a camera body, a back cover rotatably supported on one side of the camera body, a peripheral area between the camera body and the back cover that requires waterproofing, and when the back cover is closed, the camera An elastic waterproof member held between the camera body and the back cover, and a watertight closing means for crushing the elastic waterproof member between the camera body and the back cover when the back cover is closed.
An auxiliary hinge (e.g. 20) rotatably supported on the free end of the camera back, and the camera back held in the closed position in conjunction with the rotation of the auxiliary hinge toward the camera body after the camera back is closed. A biasing member (for example, 24, 2
5), and a transmission member (for example, 21, 23, 2
8), a waterproof camera is obtained in which the auxiliary hinge is locked to the other side of the camera body by the biasing member when the back cover is held in the closed position.

In other words, since the urging force of the same urging members 24 and 25 can serve both the function of crushing the elastic waterproof member 10 and the function of holding the back cover 6 in the closed position, it is possible to make the structure smaller. In addition, since the auxiliary hinge 20 is provided, the following effects can be expected. That is, when opening the back cover 6, first close the back cover, and then the back cover 6 and camera body 3
and the auxiliary hinge 20.
Since the camera back will not open unless the grip is released, the cartridge will not fall accidentally when film is loaded. In other words, if the auxiliary hinge 20 is provided, the back cover 6
Before opening the camera back cover 6, the camera body 3 is normally gripped by the camera back cover.
This prevents the cartridge from falling when the back cover opens at the same time as the lock is released (for example, when the back cover is facing toward the water).

Next, the hinge side of the back cover 6 will be explained. 6th
The figure is a cross-sectional view showing an embodiment on the hinge side of the back cover.
This figure is a side view taken in the direction of arrow B in FIG. 6. In both figures, a cover 1 having a guide protrusion 1 a is fixed to a camera body 3 with screws 2 . A sliding hinge 4 having a straight groove 4a and a rising portion 4b fitted into the guide protrusion 1a can slide vertically in FIG. 6 between the camera body 3 and the cover 1 while being guided by the guide protrusion 1a. . A biasing member 5 such as a spring is disposed between the cover 1 and the rising portion 4b of the sliding hinge 4, and presses the sliding hinge 4 downward in FIG. bias in the direction. One end of the hinged back cover 6 rotates around a hinge shaft 70 supported by the sliding hinge 4. Two locking pins 6a and 6b are implanted at the other end of the hinged back cover 6.

An elastic waterproof gasket 10 such as an O-ring shaped along the periphery of the back cover 6 is pressed in the thrust direction by the camera body 3 and the back cover 6 when the hinged back cover 6 is closed. placed between them.

Therefore, when the back cover 6 is closed and the state shown in FIGS. 6 and 7 is reached, one end of the back cover 6 is locked by the biasing member 5, and the other end is locked by the action of the locking device. energized to press the packing 10,
Achieve waterproofing. The strength of the biasing member 5 is set so that when the back cover 6 is closed, it presses the gasket 10 with a constant force to provide an appropriate pressure and prevent water leakage even under normal pressure. Camera body 3
The barrel mounting surface 3b and the barrel mounting surface 6d of the back cover 6 engage with each other to prevent permanent deformation of the gasket 10 when the external pressure exceeds a predetermined value. Of course back cover 6
The structure is such that the pressing force is applied almost uniformly to the entire packing 10. Even when water pressure is applied, the seal 10 is further pressed in the direction of being crushed by the water pressure, thereby preventing water leakage.

As described above, according to the present invention, the watertight closure means includes:
Equipped with an auxiliary hinge provided at the free end of the back cover and a biasing member that holds the back cover in the closed position and crushes the elastic waterproof member, simplifying the structure and improving operability. You can expect.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a side view of the first embodiment, and FIGS. 3, 4, and 5 are views seen from arrows A and B in FIG. and C arrow sectional view are shown, respectively. FIG. 6 is a sectional view showing an embodiment on the back cover hinge side of the first illustrated embodiment, and FIG.
It is a cross-sectional view taken along arrow B in the figure. Explanation of symbols of main parts, 3...Camera body,
9...Hinged back cover, 10...Waterproof member, 20...
Auxiliary hinge, 24, 25... biasing member, 23... transmission member.

Claims (1)

[Scope of Claims] 1. A camera body, a back cover rotatably supported on one side of the camera body, and a back cover disposed in a peripheral area between the camera body and the back cover that requires waterproofing; An elastic waterproof member that is held between the camera body and the back cover when the cover is closed, and a compressor for crushing the elastic waterproof member between the camera body and the back cover when the back cover is closed. In a waterproof camera equipped with a watertight closing means, the watertight closing means includes an auxiliary hinge rotatably supported on a free end of the back cover, and an auxiliary hinge that directs the auxiliary hinge toward the camera body after closing the back cover. a biasing member that generates a force that holds the back cover in the closed position and crushes the elastic waterproof member in conjunction with the rotating operation; and a biasing force of the biasing member is applied via the auxiliary hinge and a transmission member that transmits the transmission to the camera back, and the auxiliary hinge is latched to the other side of the camera body by the biasing member when the camera back is held in the closed position. A waterproof camera.