JPS6152433B2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a portable watch.

In recent years, with the exception of luxury watches, jewelry watches, etc., the price of portable watches, which are popular items, has decreased significantly, and there is a current demand for lower costs of exterior parts. However, it has been considered extremely difficult to reduce costs without degrading the appearance quality and functional quality of current exteriors. The present invention was invented in view of the above requirements, and takes advantage of the free plasticity characteristic of synthetic resins to simplify and standardize exterior parts, and to improve appearance and functionality.
To provide a portable watch with the same quality as conventional portable watches.

Hereinafter, a detailed explanation will be given based on a conventional side structure and an embodiment of the present invention. FIGS. 1 and 2 are cross-sectional views showing conventional side structures. In FIG. 1, a machine body 1 with a dial plate 2 is attached to a body 13 from the front side and fixed with a mechanical set screw 3.The side structure is made up of a glass 11 and a glass support member 15. A rubber gasket 16 is vertically compressed between the lower surface of the outer circumferential stage of the glass support member 15 and the upper surface of the upper protrusion of the shell 13, and the glass edge 12 is bonded between the inner circumference and the outer circumference of the upper protrusion of the shell 13. I'm eating it. Furthermore, a concave groove is provided below the case 13, and a rubber gasket 17 is also provided between this concave groove and the rising upper surface of the back cover 14.
is compressed vertically, and the rising outer periphery of the back cover 14 and the lower inner periphery of the body 13 are pressed together. Figure 2 is the first
The figure shows a conventional structure with a different structure of the glass part,
This figure shows a cross section of the external operation section, and the machine body is mounted and fixed from the front side, similar to FIG. 1.
The glass 21 is fixed by compressing a glass edge 22 and a synthetic resin packing 25 in the radial direction, and the glass edge 22 is also fixed by compressing a body 23 and a synthetic resin packing 26 in the radial direction. Further, the winding stem pipe 28 is press-fitted into a hole provided in the body 23 and then fixed with adhesive. The structure of the back cover is exactly the same as that shown in FIG. 1, with rubber gaskets 27 compressed at the top and bottom, and the back cover 24 biting into the body 23. In both FIGS. 1 and 2, the mechanical body is removed by prying the glass edge. As is clear from the figures, the conventional structure shown in Figures 1 and 2 has the disadvantage that the shapes of the inner periphery of the body and the inner periphery of the glass rim are extremely complex, resulting in an extremely large number of cutting steps. . Furthermore, in the case of Fig. 1, the cross-sectional shape of the glass fixing member is complicated, with a stepped portion on the outer periphery, and the glass must be adhesively fixed to the glass support member without any gaps.
It is time consuming. In the case of Figure 2, the synthetic resin gasket is compressed to maintain the waterproofness and fixing force between the glass and the glass edge, but the contact surfaces between the glass edge and the synthetic resin gasket on the body are precisely This method requires cutting with a good quality and a good surface finish, and also has disadvantages such as the tightness of each synthetic resin packing tends to vary, and the above-mentioned quality of waterproofness and fixing force is unstable.
Furthermore, although the winding stem pipe is press-fitted into the barrel and fixed with adhesive, there is a problem in that when the back cover is bitten into the barrel, the adhesive is broken due to the stress on the outer periphery. Both FIG. 1 and FIG. 2 have a large number of parts, require a large number of processing steps, and are very disadvantageous in terms of cost. Furthermore, there are many parts that cause waterproofing defects, and the yield is poor in terms of quality.

The present invention completely eliminates the above-mentioned conventional drawbacks, and embodiments thereof are shown in FIGS. 3 to 5. FIG. 3 shows a cross section of the machine fixing part, and FIG. 4 shows a cross section of the external operating part. In FIG. 3, a circumferential stepped portion 36a is provided on the upper inner periphery of an inner body 36 made of synthetic resin, and a glass support member 35 is attached to this circumferential stepped portion 36a. Further, an inorganic glass 31 is attached above the glass support member 35, and by compressing the upper protrusion 36b of the inner body with the outer periphery of the glass 31 and the inner periphery of the metal glass edge 32, the glass 31 and the glass edge 32 are compressed. is fixed and maintains waterproofness. In this case, the incorporation is the glass edge 32
Just press it in from above. Further, a circumferential step portion 36c is similarly provided below the outer periphery of the inner body 36,
A metal outer shell 33 is attached to engage with this circumferential step. By compressing the lower protrusion 36d of the inner case with the lower inner periphery of the outer case 33 and the outer periphery of the rising portion 34a of the metal back cover 34, the case 33 and the back cover 34 are fixed and maintain waterproofness. . Furthermore, a protrusion 3 is provided in the radial direction on the lower inner periphery of the inner shell 36.
6e is provided, and when the machine body 1 is mounted from the front side as in the conventional case, the machine body 1 is positioned in the radial direction by the inner periphery of this protrusion 36e, and fixed by the machine set screw 3. In FIG. 4, the inner shell 46 is provided with a cylindrical protrusion 46a having a through hole inside at one or more places, and this cylindrical protrusion 46a is provided with a through hole provided in the outer shell 43. It is inserted into the hole 43a and serves as a winding stem pipe in the conventional structure. This method of insertion is such that when setting the inner shell 46 to the outer shell 43, insert the cylindrical protrusion 46a into the through hole 43a while inserting the inner shell 46 into the outer shell 43.
Just fit it into 3. For this purpose, the cylindrical protrusion 46
Difference l between the outer diameter of a and the inner diameter of the through hole 43a of the outer shell 43
is set to be as large as possible, and the protrusion length m of the cylindrical projection 46a is set as small as possible.Since the inner shell 46 is made of synthetic resin, it can be assembled because it deforms to some extent. FIG. 5 shows a cross section of an embodiment in which the fixing force between the inner case and the outer case is increased, and a circumferential stepped portion 53a with a gap is provided at the lower end of the inner circumference of the outer case 53. A protrusion 56a of the inner shell is formed on this circumferential step 54, and this protrusion 56a catches on the outer shell 53, thereby increasing the fixing force between the inner shell 56 and the outer shell 53.

As described above, in the present invention, the shapes of the outer shell, the inner periphery of the glass edge, and the cross section of the glass support member are extremely simplified, so the cutting man-hours are greatly reduced, and the number of parts is also reduced compared to the conventional structure. It is extremely low cost, with 2 to 3 fewer parts compared to the previous model, and is easy to assemble, reducing assembly man-hours. If the inner shell is made of thermoplastic elastomer such as polycarbonate, Diuracon, Tefzel, Pelprene, etc., it can be easily formed into any complex shape by injection molding, and the unit cost can be kept low due to mass production. as standard parts,
The so-called changing method, which changes the glass edge and the outer circumference of the outer body, expands the variety of designs and also leads to cost reductions. Furthermore, in the present invention, there are only three places that can cause waterproofing failure: between the glass and the inner case, between the back cover and the inner case, and the inner circumference of the cylindrical protrusion on the inner case, making the waterproof property extremely stable.
For example, even if moisture infiltrates between the glass edge and the inner case, or between the inner case and the lower inner circumference of the outer case, it will not cause waterproofing, so the surface condition of the inner circumference of the glass edge and the lower inner circumference of the outer case will not be affected. Since the glass edge can be extremely rough, the fixing force of the glass edge and the outer shell to the inner shell does not pose any problem. Moreover, the external operation part is press-fitted with the winding stem pipe as before.
There is no need for adhesive fixation, there are no problems such as adhesive failure, and the structure is extremely advantageous in terms of both man-hours and quality.

As described above, the present invention provides a portable watch with extremely low cost and high quality stability compared to the conventional structure, and has high expectations for its future as a highly profitable device. .

[Brief explanation of the drawing]

Figures 1 and 2 are cross-sectional views showing the conventional structure.
Figures 3 to 5 are cross-sectional views showing embodiments of the present invention, with Figures 1 and 3 showing the machine fixing part, Figures 2 and 4 showing the external operation part, and Figure 5 showing the inner barrel. This was designed to improve the fixing force of the outer body. 1... Machine body, 2... Dial plate, 3... Machine set screw, 11, 21, 31, 41... Glass, 1
2, 22, 32, 42...Glass edge, 13, 23
...Body, 33, 43, 53... Outer shell, 14,2
4, 34, 44, 54...back cover, 15, 35,
45... Glass support member, 16, 17, 27...
Rubber packing, 25, 26... Synthetic resin packing, 28... Stem pipe, 36, 46, 56...
Inner body.

Claims (1)

[Scope of Claims] 1. In a portable watch in which a mechanical body to which a dial plate and hands are attached is attached, fixed, and removed from the front side (glass side), the sides are the outer case, the inner case, the glass, and the glass support member. It mainly consists of a glass rim and a back cover.
The inner shell is made of synthetic resin, and a circumferential stepped portion is provided below the outer circumference, the diameter of which is smaller at the bottom than the upper portion, and the outer shell is attached to the outer circumference of the inner shell to engage with this stepped portion. A circumferential step part is provided above the circumference, the diameter of which is smaller at the bottom than the upper part, the glass supporting member is attached to the circumferential step from above, the glass is attached above the glass supporting member, and the glass is attached above the inner body. The protrusion is compressed and locked between the outer periphery of the glass and the inner periphery of the glass edge, the lower protrusion of the inner case is compressed and locked between the rising outer periphery of the case back and the lower inner periphery of the outer case; A portable watch characterized in that a circumferential protrusion is provided in the inner radial direction on the lower side of the circumference, and the inner circumference of the protrusion is used for positioning the mechanical body in the radial direction. 2. Claim No. 2, characterized in that a cylindrical protrusion having a through hole inside is provided on the outer periphery of the inner shell, and the cylindrical protrusion is inserted into the through hole provided in the outer shell. The mobile watch side described in item 1. 3. The portable watch according to claim 1, wherein the inner body made of synthetic resin is made of thermoplastic elastomer.