JPS6396644A - Camera with water-proof and water-drop preventive structure - Google Patents

Abstract

PURPOSE:To improve the water-proofing property of a camera with a simple, small-sized constitution by easy operation by deforming the outer peripheral projection of a packing at a constant angle by an abutting part arranged on an external cover, etc. CONSTITUTION:The projection part 13a is provided to the outer peripheral part of the packing 13 and this projection part 13a is deformed at the specific angle theta by the abutting part 11a formed of the slanting part 11a of the external cover 11. The projection part 13a contacts the abutting part 11a and the packing 13 prevents completely water from entering the gap surrounded with the cover 11, a back id 12, and the packing 13. The water-proof property is improved by the easy operation with the simple, small-sized constitution. The same effect is obtained even when the abutting part is provided to the back lid.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a waterproof camera, and particularly to a waterproof camera back mechanism.

<Conventional technology> Conventionally, the back cover waterproof mechanism of this type of waterproof camera was
As shown in FIG. There is a type in which ribs 2a are formed around the inner surface, and when the back cover 2 is closed, the ribs 2a press against the waterproof gasket 3 in the thrust direction to make it waterproof.As shown in FIG. Most of the waterproof gaskets 3 are installed in the groove 2b provided on the outer circumferential surface, and when the back cover 2 is closed, the waterproof gaskets 3 are pressed against the inner circumferential surface of the waterproof outer cover 1 in the radial direction. be.

<Problem to be solved by the invention> By the way, waterproof packing must always maintain a certain degree of elasticity, and for this reason, its repulsive force is considerable when it extends all around the circumference, and the former type The back cover 2 deforms outward where it presses against the waterproof gasket 3, and in the latter type, the outer cover 1 deforms outward, resulting in an increase in the thickness of the back cover 2 and outer cover 1, making the camera larger. They were often packed away or made of metal, making them extremely heavy.

In addition, in the former type, the rib 2a of the back cover 2 is made as thin as possible in order to minimize the reaction force on the back cover 2 - it is relatively common for the rib 2a to be carelessly deformed or broken. Ta.

Furthermore, in terms of operability, when opening the back cover 2 of the former type, it opens immediately due to the elasticity of the waterproof gasket 3, but when closing it, the waterproof gasket 3 must be crushed with considerable force to close. Since the inner peripheral surface of the outer cover 1 and the waterproof gasket 3 are in contact with each other, it takes considerable force to open and close the back cover 2. In addition, in the former type, the reaction force of the waterproof gasket 3 is large, so a fairly strong back cover lock is required.

SUMMARY OF THE INVENTION An object of the present invention is to provide a waterproof camera having a waterproof groove in the back cover, which eliminates the drawbacks of the prior art, and which is compact and easy to operate.

<Means for Solving the Problems> The configuration of the present invention for achieving the above-mentioned object will be explained using FIG. 1 corresponding to an embodiment.

The present invention provides a protrusion 13a on the outer periphery of the waterproof gasket 13 attached to the inner peripheral part of the back cover 12, and the protrusion 13a
Contact part 1 that deforms a by giving it a certain angle θ
'+a is arranged on the rear end surface of the outer cover 11.

Function> When the back cover 12 is open, the protrusion 1 of the waterproof gasket 13
3a is in the position shown by the two-dot chain line in the figure, but when the back cover 12 is in the closed state, the protrusion i3a abuts against the contact part 11a of the outer cover 11 and bends to the position shown by the solid line.

Then, the protruding part 13a of the waterproof packing 13 comes into close contact with the contact part 11a of the outer cover 11, and the outer cover 11 and the back cover 1
2 and the waterproof packing 13 can be completely waterproofed by the waterproof packing 13.

<Example> Hereinafter, an example of the present invention will be described based on FIGS. 1 to 3. Reference numeral 11 denotes an outer cover, which covers the camera body (not shown), and has an inclined portion 11a forming an inclination angle θ and serving as a contact portion on its rear end surface.

Reference numeral 12 denotes a back cover, one end of which is pivotally supported by the outer cover 11, and a protrusion 12a is provided around the inner surface of the back cover.

13 is a waterproof gasket, which has a protrusion 13a and a pair of legs 13.
The groove 13b formed by the groove 13b has a cross-sectional shape of the letter C, and the groove 13b is formed by the protrusion 1 of the back cover 12.
It is fitted and attached to 2a.

Then, when the back cover 12 is closed against the outer cover 11, the protrusion 13a of the waterproof gasket 13 comes into contact with the inclined part 11a of the outer cover 11, as shown in FIG. The waterproof packing 13 blocks water entering the gap S between the outer cover 11 and the back cover 12 when the outer cover 11 and the back cover 12 are bent to the position shown.

Here, in FIG. 2, the protrusion 1 of the waterproof packing 13 is
If the radius of the curved portion 3a is too small, when the back cover 12 is closed, it will be bent by the inclined portion 11a of the outer cover 11 and wrinkles will occur. This wrinkle can be prevented by increasing R to a large value. The critical value for this is waterproof gasket 13
The shape of the protruding portion 13a and the inclined portion 11a of the outer cover 11
overlap fitA with the slope part 1 of the outer cover 11
The inclination angle θ of 1a, the amount of pushing of the back cover 12 from when the protrusion 13a of the waterproof gasket 13 starts touching the oblique portion 11a of the outer cover 11 when the back cover 12 is closed until it becomes closed, and the amount of pushing of the back cover 12, and the waterproof gasket 13. According to the inventor's experiments, the protrusion 13a of the waterproof gasket 13 has a base thickness of 1 mm and a tip thickness of 0.5 mm, although the thickness varies depending on the mechanical properties of the waterproof gasket 13.
mrtt, inclination angle θ is 30°, overlap amount A is 0.5 mm, the above-mentioned pushing amount is 1, and the hardness is approximately 30.
In the case of rubber of °, if R is approximately 10 mm or more,
It has been confirmed that it does not cause wrinkles.

FIG. 4 shows another embodiment of the invention.

In order to simplify the explanation, the same reference numerals are given to the parts having the same functions as those in the embodiment shown in FIG. 1, and only the different points will be explained.

In this embodiment, the outer periphery of the back cover 12 is formed into an elongated edge 12b that extends forward, and a joining step 11 is formed on the outer periphery of the rear end of the outer cover 11.
When the back cover 12 is closed, a bent gap is formed between the elongated edge 12b of the back i12 and the joining step 11b of the outer cover 11, so that the outside of the camera is protected from tap water or showers. When exposed to a water stream having such water pressure, the water pressure decreases and reaches the waterproof gasket 13, thereby increasing the reliability of waterproofing.

FIG. 5 shows still another embodiment of the present invention. In this embodiment, another protrusion 12C is provided outside the protrusion 12a of the back cover 12 by the thickness of the leg portion 13C of the waterproof packing 13, and the outer surface of the protrusion 12C is tapered. , the waterproof gasket 13 is attached by fitting one leg 13C of the waterproof gasket 13 into the recess formed between the protrusions 12a and 100, and the other configuration is the same as the embodiment shown in FIG. 1 described above. It's exactly the same.

With this configuration, for example, when loading film inside an airplane during flight, the internal air pressure of the camera will be lower than the external air pressure when the camera comes down to the ground, and the waterproof gasket 1 will be lower than the external air pressure.
The protruding portion 13a of No. 3 sticks to the inclined portion 11H of the outer cover 11, and can prevent the waterproof gasket 13 from falling out from the back cover 12 when the back cover 12 is opened. Furthermore, the outer peripheral corner of the protrusion 12C of the back cover 12 is covered with a waterproof gasket 1.
Since the bending of the protrusion 13a of No. 3 can be restricted at this portion, it is possible to prevent wrinkles from occurring at the R portion in the embodiment shown in FIG. 1 and to reduce the value of R. . Here, it is desirable that the outer tapered surface of the protrusion 12C of the back cover 12 be substantially parallel to the surface of the sloped portion 11a of the outer cover 11 in order to prevent the protrusion 13a of the waterproof gasket 13 from escaping.

6 and 7 show still another embodiment of the present invention.

In this embodiment, one leg 1 of the waterproof packing 13 is
The inner surface of 3C, ie, one of the inner walls 13d of recess t3b, is formed in a wave shape, and a large number of small holes 13e are bored in the bottom of recess 13b. The rest of the structure is exactly the same as the embodiment shown in FIG. 100 and the recessed part 13 of the waterproof packing 13
Air pockets are formed in b, but these air
Since it can be released through 3e, assembly accuracy can be improved. Further, after assembly, the assembly accuracy can be further ensured by removing air from the small holes 13e using a vacuum pump or the like.

FIG. 8 shows yet another embodiment of the invention. In this embodiment, the back cover 12 is provided with a date imprinting unit, and an inner cover 14 is attached to the inner surface of the back cover 12.
2 is provided with only a protruding ridge 12C similar to the embodiment shown in FIG. It is designed so that its functions can be divided and performed. The rest of the structure is exactly the same as the embodiment shown in FIG. 5 described above.

With this configuration, the protrusions 12G and 14a can be separated at positions where the waterproof function can be ensured.

FIG. 9 shows another embodiment in which the present invention is applied to a part other than the back cover, in which the waterproof mechanism shown in FIG. 1 is used in the battery compartment of a waterproof camera.

In this embodiment, an inclined part 21a is formed at the inner open end of the wall part 21 of the battery chamber, and a protrusion 23a is formed on the protrusion 22a provided around the inner surface of the battery compartment lid 22.
A waterproof gasket 23 in the shape of a diagonal is attached. Furthermore, when the battery cover 22 is closed, the protrusion 23a of the waterproof gasket 23 comes into contact with the inclined part 21a of the battery chamber wall 21 and is bent. Waterproofing is achieved by closely adhering to the inner surface of 21.

In each of the above embodiments, it goes without saying that the structural relationship between the outer cover and the back cover may be reversed, with the waterproof gasket attached to the outer cover side.

<Effects of the Invention> As explained above, the present invention provides a protrusion on the waterproof gasket attached to the back cover, and when the back cover is closed, the protrusion is held at a certain angle by the contact part with the outer cover. By deforming the waterproof part, it can be made more compact by eliminating dead space in the waterproof part, and the back cover can be easily closed.

[Brief explanation of the drawing]

FIG. 1 is an enlarged cross-sectional view of essential parts of an embodiment of a waterproof/splash-proof camera according to the present invention, FIG. 2 is a front view of the inside of the back cover, and FIG. The line sectional view, FIG. 4, and FIG.
7 and 7 show still another embodiment of the present invention, FIG. 6 is a rear view of the main part of the waterproof packing, FIG. FIG. 8 is a cross-sectional view of a main part of another embodiment of the present invention, FIG. 9 is a cross-sectional view of a main part in which the present invention is applied to a battery compartment, and FIGS. 10 and 11 are a back cover waterproof part of a conventional example. FIG. 11... Outer cover, 11a... Inclined part (contact part),
12...Back cover, 12a, 12C...Protrusion, 1
3...Waterproof packing, 13a...Protrusion, 14...
・Inner lid, 21... Wall of battery chamber, 22... Battery lid,
23...Waterproof gasket, 24...Battery Figure 1 Figure 2 Figure 3 Y''''''! @41A 13 13c Figure 8 Figure 9

Claims (1)

[Claims] 1. A protrusion is provided on the outer periphery of the waterproof packing attached to the back cover or outer cover, and a contact part that deforms the protrusion at a certain angle when the back cover is closed is provided on the outer cover or the back cover. A camera with a waterproof and drip-proof structure.