JPS59637Y2 - Side structure of mobile watch case - Google Patents

Description

[Detailed description of the invention] The present invention focuses on the side structure of a portable watch, especially a portable watch that has a thinner body, a smaller outer diameter of the case back, improved waterproofness, and easy opening and closing of the case back. This relates to a structure in which the back cover is opened and closed using a bayonet structure.

In the past, many proposals have been made for this type of back cover fixing structure due to its superior features such as ease of opening and closing the back cover, but none of these plans have been put into practical use for mass production. is in an insufficient state.

This is because the bayonet structure that has been proposed in the past, as shown in Figure 1, has only been pursued by simply fixing the back cover using the bayonet locking method, and a comprehensive investigation including the function of the watch side has not been conducted. This is thought to be because it is sufficient.

The present invention was devised with the aim of making comprehensive research on the watch side in order to make the most of the advantages of the bayonet structure from these points. The machine body is securely fixed by a body such as a spring or a packing, and the rotating direction of the back cover is also securely stopped by the outer circumferential surface of the pipe and the outer circumferential surface of the back cover bayonet protrusion. By compressing the packing sandwiched between the inner circumferential surface of the lower part of the body and the outer circumferential surface of the lower part of the case back using the force of the watch case, waterproofness is improved, and the bayonet structure as the side structure of a waterproof watch is put into practical use.

Hereinafter, the present invention will be explained in detail with reference to an embodiment shown in the drawings.

FIG. 2 shows the specific structure of the present invention, and FIG. 3 shows the trunk 11.
This figure specifically shows the planar relationship between the bayonet locking portion of the back cover 12, and the barrel 11 has a bayonet portion protrusion 11f and a bayonet recess on its inner peripheral surface for bayonet locking. 11a, and the back cover 12 has a bayonet part protrusion 12a and a bayonet recess 12k on its outer peripheral surface, which correspond to the protrusion 11f and recess 11a of the body 11. Protrusion 11
Upper surface 11 of f and bayonet protrusion 1 of e and back cover 12
A ring-shaped spring 15 is formed on the upper surface 12C of the back lid 12 and has a wavy undulating portion having an elastic force in the vertical direction. The spring is engaged with one or more recesses 13a provided on the lower outer circumferential surface of the machine body 13 by one or more protrusions 15a machined on the inner circumferential surface of the spring while exerting a force on each other in the radial direction. ing.

Therefore, the spring 15 is loosely fitted between the protrusion 15a and the recess 13a.

Further, the wavy ring spring 15 is in contact with the machine body 13 at its upper surface 15b while exerting a force in the vertical direction, and the machine body 13 is in contact with the shell 11 at its outer circumferential upper surface 13b while exerting a force in the vertical direction. They are in contact with each other.

Furthermore, the inner circumferential surface 11 b of the lower part of the trunk, the lower surface 11 C, the inner circumferential surface 12 d of the lower part of the back cover, the lower surface 12 e, and the upper surface 12
In the packing box constituted by F, a packing 14 having a convex upper portion is held between the inner circumferential surface 11b of the body and the outer circumferential surface 12d of the lower part of the back cover so as to be compressed mainly in the radial direction.

Also, a plurality of knurled grooves 12 are provided on the outer periphery of the back surface of the back cover 12.
g or spanner groove 12h, etc. are machined, and the body 1
One or more pipes 16 are attached to the pipe 1 and are fixedly held so that the tip portion 16a protrudes only from the inner circumferential surface 11d of the barrel.

Next, on the side having the bayonet structure according to the present invention,
The details of assembling the bayonet structure and opening and closing the back cover will be explained.

First, the inner protrusion 15 a of the wavy link spring 15 is inserted into the groove 13 a on the outer circumferential surface of the lower part of the machine body 13 so that the wavy ring spring 15 does not come off in the vertical direction and is also fixed in the rotational direction. to lock.

Then, insert this mechanical body with the wavy ring spring into the body 11, and place the convex portion 14 of the gasket 14 in the upper direction of the back cover 12 so that the back cover 12 can be easily assembled into the lower outer peripheral surface 12d of the back cover 12, as shown in FIG. A gasket 14 is wound around with a tightening margin so that the side a faces, and the back lid with the gasket is assembled so that the protrusion 12a on the upper outer peripheral surface of the back lid 12 can be inserted into the inner peripheral recess of the barrel 11.

In this operation, chamfers 12i are provided on the inner and outer peripheries of the upper surface 12C of the back cover 12 in order to improve the ease of assembling the back cover 12.

Furthermore, bend the wavy ring spring 15 of the back lid with a seal until the lower surface 12b of the protrusion of the back lid 12 is closer to the wavy link spring than the position of the locking surface 11e of the body 11, and then Back cover 12 and spring 1
By applying a rotational force in the rotational direction to the operating elements for opening and closing the back cover, such as the knurled groove 12g and the spanner 12h, which are machined on the outer periphery of the back surface of the back cover, while the
2 is rotated in the rotational direction as shown in FIG. 3, and the rotation of the back cover in the rotational direction is stopped at the tip 16a of the pipe 16.

Moreover, when opening the back lid, the operation described above can be reversed.

Next, the appearance and functional effects of the bayonet structure of the present invention will be explained.

In the bayonet structure of the present invention, the back cover upper surface 12
A wavy ring spring 15 having elastic force in the vertical direction on C
By arranging this, the elastic force of the wavy ring spring 15 provides sufficient engagement force when the watch is normally carried, and the back cover 12 can be securely fixed.

In other words, since the back cover is pushed downward by the wavy ring spring, the friction of the bayonet locking portion is increased, and the back cover does not naturally loosen, resulting in high reliability.

Further, the opening and closing operations of the back cover 12 are performed with the wavy ring spring sufficiently bent, so that the operation is easy.

Furthermore, the bayonet structure of the present invention has the advantage that the rotation of the back cover is stopped by the pipe block 16 protruding from the inner circumferential surface of the barrel 11, so that the rotation of the back cover is reliably stopped.

Furthermore, in the bayonet structure of the present invention, the packing 14
The inner circumferential surface 11b of the lower part of the trunk and the outer circumferential surface 12d of the lower part of the back cover.
The experimental results of the bayonet structure according to the present invention have shown that high waterproofness can be obtained by sandwiching it between the two and compressing it mainly in the radial direction.

Further, since the gasket 14 is compressed in the radial direction, the outer diameter 12j of the back cover 12 is reduced, and design restrictions around the back cover at the bottom of the mobile watch case are reduced, resulting in a great advantage of a very clean appearance.

As is clear from the above description, the present invention makes it possible to realize a portable waterproof watch with a sufficiently practical bayonet structure.

Furthermore, in the bayonet structure of the present invention, instead of the wavy ring spring 15, a packing 17 is used as shown in FIG.
is used, and a middle frame 18 is provided to prevent the packing from escaping.
Furthermore, a similar effect can be obtained by installing a receiving ring 19 between the machine body 13 and the shell 11.

As described above, the bayonet locking structure of the back cover of the present invention was conceived to make the locking more effective than just the conventional bayonet locking. An elastic member that works to push down the back cover, and a gasket groove that has compressive force in the radial direction, which was designed to optimize this effect in terms of the force relationship with the opening and closing of the back cover, provide unprecedented practicality. It is possible to obtain a structure with unique characteristics.

[Brief explanation of the drawing]

FIG. 1 is a partial vertical sectional view showing a conventional structure. FIG. 2 is a partial vertical sectional view showing an embodiment of the present invention. Figure 3 is its cross-sectional view. FIG. 4 is a partial vertical sectional view showing another embodiment of the present invention. 1.11...Body, 2,12...Back cover, 3,13...
...Mechanical body, 4, 14.17...Patsukin, 15...
・Wavy link spring, 16... winding stem pipe, 1B...
Middle frame, 19... Uke ring.

Claims (1)

[Claims for Utility Model Registration] 1. In a watch case in which the case back is fixed to the body by a bayonet structure, the case and the case back hold the gasket in the radial direction, and the inner surface of the case case has an elastic force in the vertical direction. A side structure of a mobile watch case characterized in that an elastic body is provided to apply a contact force to a bayonet locking part. 2. The structure according to claim 1 of the utility model registration claim is characterized in that one end of the bayonet protrusion of the rotating back cover is brought into contact with a pipe protruding from the inner peripheral surface of the body to prevent the rotation of the back cover. The side structure of the mobile watch case.