JPH09318771A - Wrist watch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix a buffer member to a wrist watch case 1 or watch band with a uniform force hardly loosening without limitation of materials. SOLUTION: To a female screw part 11 formed in the lower inner wall surface of a wrist watch case 1, the male screw part 14 formed on the inner surface of a back lid 6 is screwed in and tightened so that the chin part 15 of a buffer member 8 made of an elastic material arranged at the level, difference part 10 formed on the lower periphery of the wrist watch case 1 is pushed to the level difference part 10 by the periphery part 13 of the back lid 6 to fix. By this, the chin part 15 of the buffer member 8 can be fixed with a uniform force hardly loosening by the periphery 13 of the back lid 6. Furthermore, as the buffer member 8 is other member than the wrist watch case 1 and the watch band, the wrist watch case 1 and the watch band are not limited by the material as before and can have a metallic sense.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a wristwatch.

[0002]

2. Description of the Related Art Conventionally, in a wristwatch, it is necessary to protect the timepiece mechanism by absorbing an external shock. In such a shock-absorbing structure of a wristwatch, for example, a watch case and a watch band are integrally formed of an elastic material, and a shock-absorbing portion protruding to the back side of the back cover is formed on a part of the watch band made of this elastic material. , The structure of which the back side of the back cover is floated so that the shock is not applied directly to the back side of the back cover, or when the back cover is attached to the back side of the watch case with a plurality of screws, it is elastic by these screws. For example, there is a structure in which a buffer member made of a material is simultaneously fixed to the back surface of the back cover.

[0003]

However, in the former cushioning structure, since the wristwatch case and the watch band are integrally formed and the cushioning portion is formed in a part thereof, the watch case and the watch band are made of a material. Therefore, the wristwatch case and the timepiece band must be made of an elastic material, and there is a problem in that it is not possible to obtain a metallic feeling. In the latter shock absorbing structure, since the shock absorbing member is attached to the back cover with a plurality of screws,
It is difficult to fix the cushioning member with a uniform force, and there is a problem that the cushioning member is likely to come off.

An object of the present invention is to make it possible to fix the cushioning member with a uniform force so as not to come off easily, without the wristwatch case and the watch band being restricted by the material.

[0005]

According to the present invention, there is provided a wristwatch case in which a step portion is formed on the outer peripheral surface on the back surface side, and a fitting portion is formed on the inner wall surface on the back surface side, and the back surface of the wristwatch case. A back cover having an outer peripheral portion projecting toward the step portion side and having a fitting portion to be fitted to the fitting portion,
An elastic material, which is formed on the stepped portion of the wristwatch case and has a collar portion pressed by the outer peripheral portion of the back lid, and an extending portion extending from the collar portion from the back surface of the outer peripheral portion of the back lid. And a cushioning member made of.

Therefore, according to the present invention, by fitting the fitting portion of the back cover to the fitting portion of the wristwatch case,
The collar of the cushioning member placed on the stepped portion of the wristwatch case is pressed against the stepped portion of the wristwatch case by the outer peripheral portion of the case back to be fixed, so that the outer peripheral portion of the case back detaches the collar portion of the cushioning member with uniform force. Since it is difficult to fix, and the cushioning member is a member different from the wristwatch case and the watch band, the wristwatch case and the watch band are not restricted by the materials as in the conventional case, and a metallic feeling is obtained. It will be possible.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of a wristwatch according to the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is an enlarged cross-sectional view of a main part of a wristwatch, and FIG. 2 is an exploded perspective view of the main part. In these figures, 1 is a watch case. A watch glass 2 is attached to the upper part of the wristwatch case 1 through a packing 3, and a watch module 4 is disposed inside the wristwatch case 1 as indicated by a chain double-dashed line in FIG. . A push button switch 5 is provided on the side wall of the wristwatch case 1. Further, a back cover 6 is attached to the lower part of the wristwatch case 1 via a waterproof packing 7, and a cushioning member 8 is attached by the back cover 6.

In this case, a step portion 10 is formed on the outer peripheral surface of the lower portion of the wristwatch case 1, and a female screw portion (fitting portion) 11 is formed on the inner wall surface of the lower portion thereof. Watch case 1 located between the parts 11
A waterproof groove 12 in which the waterproof packing 7 is arranged is annularly formed on the lower surface of the. On the other hand, the back case 6 has a wristwatch case 1
An outer peripheral portion 13 is formed so as to project toward the stepped portion 10 side of the wristwatch case 1
A male screw portion (fitting portion) 14 that is screwed into the female screw portion 11 is formed. The cushioning member 8 is made of an elastic material such as an elastomer (synthetic rubber) such as polyurethane or a soft synthetic resin, and is arranged on the step portion 10 of the wristwatch case 1 and is pressed by the outer peripheral portion 13 of the back cover 6 and the collar portion 15. ,
An extension portion 16 that extends obliquely below the back surface of the back lid 6 from the flange portion 15 to the side of the outer peripheral portion 13 of the back lid 6 is formed integrally with each other in a ring shape. It has a special structure.

The push button switches 5 are provided at a plurality of locations on the side wall of the wristwatch case 1, as shown in FIG. That is, the push button switch 5 is, as shown in FIG.
The wristwatch case 1 is provided with a tubular member 17 provided in a through hole 1a formed at a predetermined position on the side wall portion. A button member 20 having a button head 19 provided at the other end of the button shaft 18 from which the tip of the button shaft 18 projects into the wristwatch case 1 is arranged in the tubular member 17, and the tubular member 17 has a tubular shape. A waterproof ring 21 is provided that is in pressure contact with the inner surface of the member 17 and the outer peripheral surface of the shaft portion 18 of the button member 20. And waterproof ring 2
A coil spring 22 for urging the button member 20 toward the outside of the wristwatch case 1 is provided on the outer periphery of the button shaft 18 between the button head 1 and the button head 19, and the button shaft 18 protruding inside the wristwatch case 1 is provided. An E-ring 23 is attached to the tip of the to prevent it from coming off.

In such a wrist watch, as shown in FIG. 1, the collar portion 15 of the cushioning member 8 is provided above the outer peripheral portion 13 of the case back 6.
Is located and the extension 16 of the cushioning member 8 is located below the outer periphery 13 of the cushioning member 8. The cushioning member 8 is arranged on the outer periphery 13 of the back cover 6 in this state. When the portion 14 is screwed into the female screw portion 11 of the wristwatch case 1 and tightened, the collar portion 1 of the buffer member 8 is attached to the step portion 10 of the wristwatch case 1.
5 is pressed and fixed by the outer peripheral portion 13 of the back lid 6, so that the collar portion 15 of the buffer member 8 is fixed to the outer peripheral portion 13 of the back lid 6.
Can be fixed with a uniform force, the collar portion 15 of the cushioning member 8 is located above the outer peripheral portion 13 of the back cover 6, and the extending portion 16 of the cushioning member 8 is below the outer peripheral portion 13. Since it is installed diagonally toward you,
The cushioning member 8 is hard to come off.

Therefore, in this wristwatch, the cushioning member 8
Since the extending portion 16 of the cushioning member 8 obliquely projects below the outer peripheral portion 13 of the back cover 6,
The back surface of the watch can be floated, so that the back surface of the back cover 6 can be prevented from being directly impacted, and shocks from the outside can be buffered to well protect the timepiece module 4 in the wristwatch case 1. You can Further, in this wrist watch, since the cushioning member 8 is a member different from the wrist watch case 1 and the watch band (not shown), the wrist watch case 1 and the watch band are not restricted by the material as in the conventional case, and the metal is made of metal. Since it can be formed by, for example, a product having a metallic feeling can be obtained.

Next, a second embodiment of the wristwatch of the invention will be described with reference to FIGS. 3 and 4. The same parts as those in the first embodiment shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted. This wristwatch has substantially the same structure as that of the first embodiment except that the waterproof packing portion 25 is integrally formed with the cushioning member 8. That is,
Similar to the first embodiment, the buffer member 8 is made of an elastic material, and the collar portion 15 and the extension portion 16 are integrally formed in a ring shape, and as shown in FIGS. 3 and 4, the collar portion is formed. It has a structure in which a waterproof packing portion 25 is integrally formed on the member 15 via a connecting portion 26. In this case, on the lower surface of the wristwatch case 1 located between the step portion 10 and the female screw portion 11 of the wristwatch case 1, as shown in FIG. 3, there is a waterproof groove 27 in which the waterproof packing portion 25 and the connecting portion 26 are arranged. It is formed from the center of the lower surface thereof to the step portion 10.

In such a wristwatch, as in the first embodiment, the male screw portion 14 of the back cover 6 is screwed into the female screw portion 11 of the wristwatch case 1 with the cushioning member 8 arranged on the outer peripheral portion 13 of the back cover 6. When combined and tightened, the collar portion 15 of the cushioning member 8 is pressed and fixed by the outer peripheral portion 13 of the back cover 6 to the step portion 10 of the wristwatch case 1, and at the same time, the waterproof packing portion 25 is pressed by the outer peripheral portion 13. Since it is fixed by being fixed, it has the same effect as the first embodiment,
Particularly, since the cushioning member 8 and the waterproof packing portion 25 can be attached at one time, the assembling workability is good, and since the waterproof packing portion 25 is formed integrally with the cushioning member 8, the number of parts is small and the management of the parts is reduced. Will be easier.

In the first and second embodiments described above, the internal thread portion 11 is provided on the inner wall surface of the wristwatch case 1, the external thread portion 14 is provided on the back cover 6, and the external thread portion 14 is screwed into the internal thread portion 11. Although the structure has been described, the present invention is not limited to this. The fitting portion is provided on the inner wall surface of the wristwatch case 1, the fitting portion that fits into the fitting portion is provided on the back cover 6, and the fitting portion of the back lid 6 is used as a wristwatch. The structure may be such that it is inserted into the fitting portion of the case and fitted.

[0015]

As described above, according to the present invention, the collar of the cushioning member arranged at the step portion of the wristwatch case is fitted by fitting the fitting portion of the case back to the fitting portion of the wristwatch case. Since the outer peripheral portion of the back cover presses and fixes it to the stepped portion of the wristwatch case, the outer peripheral portion of the back cover can secure the collar portion of the cushioning member with a uniform force so that it does not come off easily. Since the watch case and the watch band are separate members, the watch case and the watch band are not restricted by the material as in the conventional case, and the watch case and the watch band can be made of metal, so that they have a metallic feeling. It will be possible to obtain.

[Brief description of drawings]

FIG. 1 is an enlarged sectional view of an essential part showing a first embodiment of a wristwatch according to the invention.

FIG. 2 is an exploded perspective view of essential parts of the wristwatch shown in FIG.

FIG. 3 is an enlarged sectional view of an essential part showing a second embodiment of the wristwatch of the invention.

FIG. 4 is a partially cutaway perspective view of the cushioning member of FIG.

[Explanation of symbols]

 1 Wrist Watch Case 6 Back Lid 8 Cushioning Member 10 Stepped Part 11 Female Threaded Part 13 Outer Part of Back Lid 14 Male Threaded Part 15 Collar Part 16 Extending Part 25 Waterproof Packing Part

Claims (3)

[Claims] 1. A wristwatch case in which a step portion is formed on an outer peripheral surface on the back surface side, and a fitting portion is formed on an inner wall surface on the back surface side, and an outer peripheral portion on the back surface of the wristwatch case is the step portion side. And a back cover formed with a fitting portion that fits into the fitting portion, and a collar portion that is arranged in a step portion of the wristwatch case and is pressed by the outer peripheral portion of the back lid. And a cushioning member made of an elastic material, in which an extending portion extending from the collar portion from the back surface of the outer peripheral portion of the case back is formed, and a wristwatch. 2. The wristwatch according to claim 1, wherein the fitting portion of the wristwatch case is a female screw portion, and the fitting portion of the case back is a male screw portion that is screwed into the female screw portion. 3. The wristwatch according to claim 1, wherein the cushioning member is integrally formed with a waterproof packing interposed between the wristwatch case and the back cover.