JPS6310554Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of an electronic wristwatch equipped with a keyboard.

Electronic watches have a watch module, which has circuit boards and electronic components glued together, housed and fixed inside the watch case. As a means for fixing this watch module to a watch case (hereinafter referred to as a watch case), there is a conventional means shown in FIG. 1. That is, in the figure, 1 is a watch case, 2 is a back cover, and 3 is a watch module.The watch module 3 includes, for example, a part of a liquid crystal holding plate 6 that is attached to the housing 4 and presses down the liquid crystal display cell 5 on the outer periphery of the housing 4. An elastic piece 7 is provided extending to the side, and an elastic piece 8 is provided on the inner surface of the back cover 2. The elastic piece 7 is pressed against the inner circumferential surface of the watch case 1, and the elastic piece 8 is pressed against the back of the watch module 3, thereby elastically supporting the watch module 3 from the sides and the back. . In addition, a fixing ring may be provided between the case 1 and the module 3.

By the way, recently, electronic wristwatches with calculation functions have been developed, but this type of wristwatch has a keyboard for operation built into the front of the watch case.
Calculation operations are performed by pressing a push button key provided on the keyboard to bring a movable contact into contact with a fixed contact provided on the timepiece module. For this reason, push button keys (hereinafter referred to as keys)
When pressed, a pressing force is applied to the watch module downward (towards the back of the watch case).

However, conventional fixation of the watch module is supported by elastic pieces, so when pressing force (pushing force) is applied by the key, the watch module falls or vibrates and moves, so it cannot be fixed securely and stably. I can't. This causes variations in key strokes, making key operations unstable, and also adversely affects the mounting of electronic components, such as displacement or bending of liquid crystal display cells.

The present invention was developed in view of the above-mentioned circumstances, and it securely and stably fixes the watch module to the watch case in the front and back directions (vertical direction) so that it does not move due to the pressing force of the keys, and the key operation is achieved by fixing the watch module firmly and stably to the watch case. The present invention provides an electronic wristwatch equipped with a keyboard that can prevent adverse effects on electronic components and the mounting of electronic components.

Embodiments of the present invention will be described below with reference to drawings. Figures 2 to 4 show one embodiment, and numeral 11 in the figures is a rectangular watch case, for example.
A display window 13 fitted with a watch glass 12 is provided on one side of the upper part, and a keyboard 1 is provided on the other side.
4 is included. This keyboard 14 includes a printing plate 15 fitted to the watch case 11 and an intermediate plate 1.
6. A plurality of keys 17 regularly arranged and inserted through each plate 15, 16, an intermediate plate 16 and a watch case 1
1, the elastic sheet 1 integrally forms each key 17 and pushes up each key 17.
8. It has a plurality of movable contacts 19 made of conductive rubber arranged corresponding to each key 17 and inserted into the watch case 11. Further, a recess 20 is formed in the inner circumferential surface 11a of the watch case 11, located above the center of the other side in which the keyboard 14 is incorporated, for example. The recess 20 is, for example, a groove having a U-shaped cross section and extending a predetermined length in the circumferential direction of the inner circumferential surface 11a. The recess 20 has a pair of side walls 20a and 20b spaced apart from each other in the front and back directions (vertical direction) of the watch case 11. In addition, 2 in the figure
1 is a dial plate provided on the back side of the watch glass 12. In the figure, 22 is a watch module provided inside the watch case 11, and this watch module 22 includes an upper housing 23, a lower housing 24 fixed to the upper housing 23, and an upper housing 23.
circuit board 25 and upper housing 23 provided in
a liquid crystal display cell 26 and an interconnector 27 provided in the upper housing 23, and a liquid crystal holding plate 2 that is attached to the upper housing 23 with screws 28 and holds the liquid crystal display cell 26.
9. It has a large-scale integrated circuit 30 and a crystal oscillator 31 attached to a circuit board 25. Also,
The upper housing 23 is formed with a plurality of holes 23a into which the movable contacts 19 of the keyboard 14 are inserted, and the upper surface of the circuit board 25 is formed with holes 23a into which the movable contacts 19 are inserted. A plurality of fixed contacts 32 are formed. Note that a power source battery 33 is housed in the lower housing 24. Further, in this watch module 22, a convex portion 34 is formed on the other side of the upper housing 23, for example, at a central position corresponding to the concave portion 20 of the watch case 11. The convex portion 34 removably engages with the concave portion 20 and has a rectangular cross section corresponding to the shape of the concave portion 20 and is in the form of a projecting piece extending a predetermined length along the circumferential direction of the upper housing 23. It is something. This convex portion 34 extends in the front and back directions of the case (vertical direction),
That is, the timepiece module 22 has side walls 34a and 34b spaced apart along the thickness direction. Further, an elastic piece 35 is formed on one side of the liquid crystal holding plate 29 and extends to the outer circumferential side of the upper housing 23 and is bent downward. It is pressed against the part. Note that the convex portion 34 and the elastic piece 35 are located at opposite positions on the other side and one side of the upper housing 23. Furthermore, 3 in the figure
6 is a back cover that fits into the open back of the watch case 11.

Therefore, when assembling such an electronic wristwatch, the watch module 22 is inserted into the watch case 11 through the open back part, and the upper housing 23 is inserted into the watch case 11.
The convex portion 34 of the watch case 11 is engaged with the concave portion 20 of the watch case 11, and at the same time, the elastic piece 35 of the liquid crystal holding plate 29 is pressed against the inner peripheral surface of the watch case 11. In this case, by pressing the elastic piece 35 against the inner circumferential surface of the watch case 11 while engaging the convex portion 34 with the recess 20, the watch module 22 can be easily and effortlessly installed inside the watch case 11. When the convex portion 34 and the concave portion 20 are engaged, both side walls 34a of the convex portion 34,
34b comes into contact with both side walls 20a and 20b of the recess 20, and the protrusion 34 is moved in the front and back directions of the watch case (vertical direction).
Since the movement of the upper housing 23, that is, the watch module 22, can be prevented from moving in the front and back directions (vertical direction) of the watch case. Also, the convex portion 34
The end walls of the upper housing, that is, the end walls of the upper housing in the circumferential direction, and the end walls of the recessed part 20, that is, the end walls of the watch case in the circumferential direction, come into contact with each other to prevent the convex part from moving in the circumferential direction. 23, that is, movement of the timepiece module 22 in the circumferential direction can be prevented. By pressing the elastic piece 35 against one side of the inner circumferential surface of the watch case 11, it applies biasing force to the entire watch module 22 to the other side, so the elastic force of the elastic piece 35 ensures that the convex part 34 is firmly attached to the concave part 20. engage with. Therefore, the watch module 22 prevents movement of the watch case in the front and back directions (vertical direction) and circumferential direction by the engagement between the convex portion 34 and the concave portion 20.
It can be fixed to 1. A particular feature is that the watch module 22 can be prevented from moving in the front and back directions of the watch case 11.

When using the electronic wristwatch, key 17
When the movable contact 19 is pushed down and brought into contact with the fixed contact 32 of the circuit board 25, the pressing force (pressing force) of the key 17 is applied to the circuit board 25, that is, the watch module 22, but the watch module 22 is not connected to the watch case. Since it is fixed by preventing movement in the front and back directions (vertical direction), the watch module 2
No. 2, the watch case does not cause vibrations or other movements in the front and back directions. Therefore, it is possible to prevent the pressing stroke of the key 17 from changing and the position of the clock module 22 (for example, the music of the liquid crystal display cell 26) from shifting.

Note that the recess formed on the inner circumferential surface of the watch case can be formed at a necessary position corresponding to the protrusion of the watch module, and its shape can also be set in various ways. The convex part provided on the watch module is preferably provided on the upper or lower housing, but it can also be provided on other parts, such as electronic components, and the shape is not limited to a groove, but can be set in various shapes such as a hole. The elastic piece provided on the watch module may be used as another component in addition to the liquid crystal holding plate, or may be provided separately, but it is not necessary to provide it. An elastic piece may be provided on the back cover to hold the watch module.

As described above, according to the electronic wristwatch equipped with the keyboard of the present invention, a groove-shaped recess is formed on the side of the inner peripheral surface of the wristwatch case, and the recess is opposed to the groove. A convex portion is formed on the side of the outer peripheral surface of the housing, and an elastic piece is formed on the holding plate that presses the liquid crystal display cell, and this elastic piece is attached to the side opposite to the side of the outer peripheral surface of the housing where the convex portion is formed. The watch module is inserted into the watch case by the elastic pressing force of the elastic piece provided on the other side of the outer circumferential surface and the engaged state of the recess on the inner circumferential side of the watch case and the protrusion on the outer circumferential side of the housing. Because it is securely fixed, the watch module inside the watch case will not move even if you press the keyboard on the top of the watch case, and the watch module will not fall out of the watch case even when the back cover is removed. The watch module can be kept inside the watch case. Therefore, the watch module can be securely and stably fixed to the watch case with a simple configuration, preventing movement in the front and back directions of the case.
It does not adversely affect the operation of push button keys or the mounting of electronic components.

[Brief explanation of drawings]

Figure 1 is an exploded cross-sectional view of a conventional electronic wristwatch.
FIG. 2 is an exploded sectional view showing one embodiment of the electronic wristwatch of the present invention, FIG. 3 is a plan view thereof, and FIG. 4 is an enlarged sectional view showing the fixing part of the timepiece module. 1...Watch case, 2...Back cover, 3...Watch module, 7, 8...Elastic piece, 11...Watch case, 14...Keyboard, 17...Push button key, 1
9...Movable contact, 20...Recess, 22...Clock module, 23, 24...Housing, 25...
Circuit board, 32...Fixed contact, 34...Convex portion, 3
6...Back cover.

Claims (1)

[Scope of utility model registration request] A wristwatch case having a keyboard with a plurality of push button type keys arranged on the top surface and a thin recess formed on the side of the inner peripheral surface, and fixed contacts provided inside the wristwatch case and corresponding to the plurality of keys. and a housing having a convex portion formed on one side of the outer circumferential surface facing the concave portion to be engaged with the concave portion; An electronic wristwatch equipped with a keyboard comprising a clock module consisting of a liquid crystal display cell holding plate on which an elastic piece is formed to elastically press the inner circumferential side of the wristwatch case.