JPS6333189Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a waterproof structure for a diver watch.

When performing underwater work over a long period of time, divers stay in a hyperbaric capsule containing helium gas and oxygen mixed with water, use this as a base, go underwater to work, and then return to the capsule and return to the hyperbaric state. have to live inside. Although the diver's watch that the diver wears while inside the capsule is waterproof, high-pressure helium gas gradually penetrates the packing, so the case of the diver's watch may deteriorate over time. The interior is filled with helium gas, creating a significant internal pressure close to the pressure inside the capsule. When the capsule surfaces after underwater work, the pressure inside the capsule is gradually lowered and returned to atmospheric pressure to prevent diving sickness, but the helium gas inside the diver watch case quickly escapes. As a result, the pressure inside the case becomes higher than the outside air, and the glass is pushed outward by the internal pressure. Especially if the pressure difference is large, this can cause the glass to break or come off, and the diver watch As a Tutsi, this was not a desirable situation.

In view of the above-mentioned circumstances, this invention is designed to allow the internal gas to leak out naturally without impairing the waterproof function when the internal pressure of the case of the diver watch becomes higher than the external pressure. The aim is to eliminate breakage and detachment of the glass of diver watches and improve the reliability of the waterproof function.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

Figures 1 and 2 show an embodiment of the present invention, with Figure 1 being a sectional view of the diver watch in its normal state, and Figure 2 being a cross-sectional view of the case when the internal pressure of the diver watch is higher than the outside pressure. FIG.

In Fig. 1, there is a step 1 at the upper part of the inner circumference of the body
a, and an annular groove 1b is formed in the stepped portion 1a. An O-ring 2 is attached to the annular groove 1b, and a glass 3 is placed on the stepped portion 1a. The glass 3 has a flange 3a formed at the lower part of the outer periphery, and an annular leaf spring 4 is placed on the flange 3a. It is held down by 5.

Therefore, the glass 3 is pressed by the glass edge 5 via the leaf spring 4. In this case, the glass edge 5 is fixed to the body 1 by biting, but it is of course possible to fix it by other means such as screws.

Further, a through hole 1c is bored in the outer peripheral part of the body 1,
A pipe 6 is fixed to the through hole 1c. The inner diameter of the upper opening of the pipe 6 is narrowed by caulking, and the steel ball 7 is inserted from the lower opening of the pipe 6.
It has become impossible to escape.

The steel ball 7 is lifted up by a coil spring 8 inserted into the pipe 6, and the lower end of the coil spring 8 is held by a screw member 9. The screw member 9 is screwed into a threaded portion formed on the lower inner periphery of the pipe 6, and closes the lower opening of the pipe 6. The register ring 10 rotatably mounted above the barrel 1 has a plurality of click grooves 10a formed on its lower surface, and the steel balls 7 engage with the click grooves 10a to selectively move the register ring 10 in the rotational direction. Positioning.

Further, an O-ring 11 is attached to an annular groove 10b formed on the lower inner circumference of the register ring 10.
The O-ring 11 is brought into contact with the side surface of the glass edge 5 to facilitate rotational sliding of the register ring 10. Furthermore, the flange 10c formed on the lower outer periphery of the register ring 10 is locked to the outer shell 12. The back cover 13 is screwed and fixed to the body 1 via a packing 14.

The diver watch configured as above is
Under normal conditions, the glass 3 is attached to the plate spring 4 as shown in Figure 1.
Since the O-ring 2 is pressed tightly against the stepped portion 1a and is arranged in the annular groove 1b, the O-ring 2 is strongly compressed, so that the waterproof function of the glass portion can be sufficiently exhibited.

Furthermore, when the internal pressure of the case of the diver watch becomes higher than the external pressure, the glass 3 is lifted upward by the internal pressure against the elastic force of the leaf spring 4, as shown in Fig. 2, and the annular groove is lifted. The compression of the O-ring 2 disposed at 1b is weakened, and the internal gas naturally leaks to the outside through a slight gap.

At this time, since the fluid flow is directed from the inside of the case to the outside, there is almost no deterioration in the waterproof function due to weakening of the compression of the O-ring 2. When the gas flows out and the internal pressure of the case approaches the external pressure, the elastic force of the leaf spring 4 overcomes the internal pressure of the case, causing the glass 3 to sink downward and compress the O-ring 2.

Therefore, even if the glass 3 moves up and down, it has a structure that prevents water from entering from the outside. In the above embodiments, the flange is formed at the lower part of the outer periphery of the glass, but the plate spring may be placed on the upper surface of the outer periphery of the glass without forming the flange.

As described above, according to the present invention, even if the internal pressure of the case becomes higher than the external pressure, the internal gas can escape naturally without impairing the waterproof function due to the pressure difference with the external pressure and the leaf spring, so the pressure difference There are no cases of glass cracking or coming off due to this, and the reliability of the waterproof function can be increased.

[Brief explanation of the drawing]

Figures 1 and 2 show an embodiment of the present invention, with Figure 1 being a sectional view of the diver watch in its normal state, and Figure 2 being a cross-sectional view of the case when the internal pressure of the diver watch is higher than the outside pressure. FIG. 1... Body, 1a... Step part, 1b, 10b... Annular groove, 2, 11... O-ring, 3... Glass, 3
a, 10c... Flange, 4... Leaf spring, 5... Glass edge, 6... Pipe, 7... Steel ball, 8... Coil spring, 9... Screw member, 10... Register ring, 10a ...Click groove, 12...Outer body.

Claims (1)

[Scope of utility model registration request] An annular groove 1 is formed in a stepped portion 1a provided at the upper part of the inner circumference of the body 1.
b, and an O-ring 2 is attached to the annular groove 1b, and a glass 3 is placed on the stepped portion 1a.
A plate spring 4 is placed on the outer periphery of the body 1.
A diver watch characterized in that it is pressed by a glass edge 5 fixed to a.