JP2521306Y2 - Watch machine case connection structure - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a timepiece mechanical case coupling structure including an upper case and a lower case for housing a timepiece mechanism.

[0002]

2. Description of the Related Art Generally, a timepiece mechanical case contains a timepiece component including a train wheel, a motor, a circuit member, and the like, and is made of resin. The upper and lower cases are joined by a plurality of screws. There is.

[0003]

However, in order to cope with the recent thinning of the case, a large number of screws are required due to the limitation of the length of the screws to be used, and the strength of the case against bending is increased. There is a problem such as weakness. Therefore, an object of the present invention is to provide a case connecting structure that does not require a large number of screws to connect a thin resin case and can further reinforce the case bending.

[0004]

[Means for Solving the Problems] That is, according to the present invention, in a resin watch mechanical case containing a timepiece mechanism, a U-shaped convex body composed of an upper case and a lower case is fitted to the inside of each of the cases. A press-fitting hole portion formed by fitting the U-shaped convex portion and the window portion, and a coupling plate press-fittable into the press-fitting hole portion.

[0005]

According to the above construction, the upper and lower cases are joined together in the following manner.
The coupling plate press-fitted into the press-fitting hole formed by the two case fitting portions exhibits the same strong coupling action as in the case of conventional screw fastening. Further, by press-fitting the metal connecting plate, the reinforcing effect against bending in the thin resin case is achieved.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings showing an embodiment. Although the timepiece machine body case of this embodiment is provided with the two connecting plates 3, it is of course possible to provide more connecting plates. In the figure, 1 is an upper case made of resin, 2 is a lower case made of resin, and both cases 1 and 2 constitute a timepiece mechanical body case. Reference numeral 3 is a metal connecting plate that connects both cases.

Specifically, the upper case 1 has an upper case U-shaped convex portion 11 and an upper case window portion 10, and the lower case 2 has a lower case U-shaped convex portion 21 and a lower case window portion 20. The upper case U-shaped convex portion 11 and the lower case window portion 20, and the lower case U-shaped convex portion 21 and the upper case window portion 10 are fitted in the arrow direction shown in FIG. To do. At this time, the timepiece component is stored in the mechanical component storage space 9 formed by fitting the upper and lower cases.

Further, in the state where the upper and lower cases are fitted,
The press-fitting hole 8 is formed by the U-shaped convex portions 11 and 21 of the upper and lower cases. Then, the metal connecting plate 3 is inserted into the press-fitting hole 8.
By press-fitting in the direction of the arrow shown in FIG. 5, the upper and lower cases are joined together. And the metal connecting plate 3
By press-fitting, the outer side in the direction opposite to the arrow shown in FIG. 5 is prevented, and the reliability of the connection between the upper and lower cases is sufficiently ensured and the case is reinforced against bending. .

In the illustrated embodiment, the U-shaped convex portions and the window portions of the upper and lower cases are fitted at 10 positions, and the connecting plate 3 is composed of two pieces. The number of parts, the number of connecting plates, and their arrangement are arbitrary.

[0010]

As described above, the timepiece mechanical case connection structure of the present invention is provided with the U-shaped convex portion and the window portion which are fitted to each other inside each of the upper case and the lower case.
A press-fitting hole portion formed by fitting the U-shaped convex portion and the window portion,
By using a connecting plate that can be press-fitted into the press-fitting hole, a large number of screws are not required for connecting a thin resin case, and the case can be reinforced against bending, which reduces the number of assembly steps. This has the benefit of being able to reduce the number and make the case thinner.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a right side view of the same.

FIG. 3 is a sectional view taken along line AA of FIG.

FIG. 4 is a sectional view taken along line BB of FIG.

5 is a sectional view taken along line CC of FIG.

FIG. 6 is a state view of the same taken along the line C-C in FIG. 1 with the connecting plate removed.

[Explanation of symbols]

 1 Upper case 10 Upper case window 11 Upper case U-shaped convex portion 12 Case mounting guide concave portion 2 Lower case 20 Lower case window portion 21 Lower case U-shaped convex portion 3 Connecting plate 4 Hours, minute hand pipe 5 Motor coil portion 6 Case mounting hole 7 Circuit board terminal 8 Press-fit hole 9 Mechanical component storage space

Claims (1)

(57) [Scope of utility model registration request] 1. A top case and the watch machine body case made of the lower case, the inside of each both cases, provided a U-shaped protrusion and the window portion fitted to each other, and the U-shaped protrusion of the window Press fit formed by mating
Holes and, watch machine body case binding structure characterized in that it is composed of a press-fit linkage plate to the press-fit hole.