JPS6231910Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a module structure of an electronic timepiece.

2. Description of the Related Art Hitherto, a module structure of an electronic timepiece, for example an electronic wristwatch, assembled as shown in FIG. 1 has been known. That is, a speaker 3 is disposed in a first housing 1 via a speaker terminal plate 2, and an electrode plate 4 and a circuit board 5 are arranged in elastic contact with the cathode (-) of a battery (not shown).
After that, the circuit board 5 is placed on the terminal plate 2, the electrode plate 4, and the switch springs 6, 6, and a second This second housing 10
The interconnects 11, 11 and the liquid crystal display cell 7 are placed in the opening of the second housing 10, the presser metal fitting 8 is placed on the upper surface of the second housing 10, and the screws 9 are inserted into the screw holes of the supports 12, 12 provided in the first housing 1. By screwing them together, the first and second housings 1 and 10 are fixed and the module is assembled.

However, in the case of the above-mentioned module structure, when the circuit board 5 is installed in the first housing 1, the terminal plate 2, the electrode plate 4, and the switch springs 6, 6 are arranged in advance. The elastic force of each member causes the circuit board 5 to float inside the first housing 1, which causes the circuit board 5 to become unstable and tilt or shake, making it difficult to assemble the module afterwards. The drawback was that I couldn't do it.

Furthermore, in order to eliminate the above drawbacks, after the circuit board 5 is placed inside the first housing 1,
Although it has been considered to quickly fix the circuit board 5 with screws, etc., this method not only increases the number of screw fixing steps, but also makes the work itself troublesome, and also increases the number of parts such as screws. The disadvantage was that the cost was high.

Considering the above points, the purpose of this invention is to easily and securely fix the circuit board in the housing by simply press-fitting the circuit board into the housing without using any screws or the like. To provide a modular structure of an electronic timepiece which is located above a circuit board of a housing and can be mounted on parts such as a display panel without moving the circuit board and has good assembly workability.

This invention will be explained below with reference to FIGS. 2 and 3. FIG. 2 is an exploded perspective view of a module built into the electronic wristwatch. In this figure, reference numeral 20 denotes a first housing, which is molded from synthetic resin. This first housing 20
has a substantially box shape with an open top, and a speaker storage section 2 for storing a speaker 21 at the bottom.
2 is formed, and an accommodating section 24 communicating with the speaker accommodating section 22 and accommodating the terminal plate 23 of the speaker 21 is also formed. Furthermore, a battery storage section 25 for storing a battery (not shown) is formed at the center of the bottom of the housing 20. Above this battery storage portion 25, an electrode plate 26 is formed to protrude toward the center of the housing 2.
It is attached to the bottom top surface of 0. This electrode plate 26 is in elastic contact with the cathode (-) of the battery. Further, spring storage portions 28, 28 are formed at the bottom edge of the housing 20 to store switch springs 27, 27 in an upright state.

Further, the housing 20 is formed with a storage wall 20a, which is a rising portion facing each other, and a circuit board 29 is mounted into the storage wall 20a from above. In this case, the storage wall 20a on which the circuit board 29 is mounted is provided with elastic locking pieces 30, 30 that lock the edges of the circuit board 29 at mutually opposing locations. This elastic locking piece 3
0 and 30 are fixed to prevent the circuit board 29 from being pushed up by the terminal plate 23, electrode plate 26 and switch springs 27, 27 of the speaker 21 when the circuit board 29 is installed in the housing 20;
Moreover, the circuit board 29 is temporarily fixed without wobbling. Further, the circuit board 29 has an electronic component 31 such as an LSI attached to its upper part, and when the circuit board 29 is attached to the housing 20, a terminal plate 23 and an electrode plate 2 are attached to the lower surface of the circuit board 29.
6 and switch springs 27, 27 are in elastic contact,
It has become conductive.

Further, a second housing 32 is mounted on the circuit board 29 within the housing 20. The second housing 32 includes a component storage portion 33 into which the electronic components 31 of the circuit board 29 are inserted from below, a display cell storage portion 35 into which the liquid crystal display cell 34 is inserted from above, and a display cell storage portion 35 into which the liquid crystal display cell 34 is inserted from above. Connector accommodating portions 37, 37 are formed for accommodating interconnectors 36, 36 for conducting electrical connection with the circuit board 29, and the first housing 20 is formed on both side edges thereof.
Relief grooves 3 of elastic locking pieces 30, 30 formed in
8,38 are formed. Further, a presser plate 39 is arranged on the liquid crystal display cell 34 and the second housing 32 to press them down. This holding plate 39 is made of metal and has a flat plate shape, and has an opening 40 formed at a location corresponding to the liquid crystal display cell 34, and both longitudinal ends of the holding plate 39 are bent downward. Engagement holes 41 are formed therein. These engagement holes 41... are connected to the first housing 20.
The retaining plate 39 engages with the locking protrusions 42 formed on the outer wall of the housing 20, so that the holding plate 39 presses the liquid crystal display cell 34, the second housing 32, and the circuit board 29 inside the first housing 20. There is. Further, a switch spring portion 43 is formed on the presser plate 39 and is bent downward from one end of the short side thereof and further extends in the horizontal direction. Both horizontal ends of the switch spring portion 43 are deformed by operating a push button switch (not shown) provided on the watch case, and are brought into contact with the switch springs 27, 27 attached to the first housing 20. A predetermined potential is supplied to the electronic circuit to cause the electronic circuit to perform a predetermined operation.

Next, a description will be given of how to assemble the modular structure of the electronic timepiece constructed as above.
As shown in FIG. 3A, the speaker 21 is previously attached to the bottom of the first housing 20 via the terminal board 23.
The switch spring 2 is inserted and arranged.
7, 27 are arranged, and then the electrode plate 26 is attached. In this case, as shown in the figure, the terminal plate 2
3, switch spring 27, 27 and electrode plate 2
6 protrudes into the first housing 20. Thereafter, when the circuit board 29 is inserted from above the first housing 20 and pressed against the elastic locking pieces 30, 30 formed on the storage wall 20a, the edges of the circuit board 29 are locked by the elastic locking pieces 30, 30, and the circuit board 29 is secured to the first housing 20 as shown in FIG.
When the circuit board 29 is provisionally fixed in this manner, the terminal board 23, the electrode plate 26 and the switch springs 27, 27 are elastically contacted with predetermined locations on the circuit board 29, respectively, and are electrically connected, and the terminal board 23, the switch springs 27, 27 and the speaker 21 are provisionally fixed. After this, the second
The second housing 32 is then placed, and the interconnectors 36, 36 and the liquid crystal display cell 34 are attached to the second housing 32. After this, a presser plate 39 is placed on the liquid crystal display cell 34 and the second housing 32, and its engagement holes 41 are engaged with the locking projections 42 formed on the first housing 20. Then, the presser plate 39 secures the liquid crystal display cell 34, the second housing 32, and the circuit board 29 to the first housing 20, respectively, as shown in FIG.
It is pressed inward and fixed in place.

As described above, according to the modular structure of the electronic timepiece, the elastic locking pieces 30, 3 lock the edge of the circuit board 29 to the storage wall 20a of the first housing 20.
0 is formed, even if the terminal plate 23, the electrode plate 26, and the switch springs 27, 27 are arranged in advance so as to elastically protrude from the first housing 20, the circuit board 29 is not attached to the first housing 20.
By simply press-fitting the elastic locking pieces 30, 30
can lock the edge of the circuit board 29 and fix the circuit board 29 in the first housing 20, and when the circuit board 29 is fixed in this way, the circuit board 29 will not float up. Since there is no slippage or wobbling, subsequent assembly work of the module can be carried out efficiently and well.

Note that in the above embodiment, the first housing 20
However, in the case where the circuit board is attached to the second housing 32 and then combined with the first housing 20, the circuit board of the second housing 32 A locking piece that locks and holds the circuit board 9 against the elastic force of the interconnectors 36, 36 may be integrally formed on the side wall of the mounting portion.

Further, in the above embodiment, the case of an electronic wristwatch has been described, but the present invention is not limited to this, and can be applied to other electronic timepieces such as table clocks and alarm clocks.

As explained above, according to the modular structure of the electronic timepiece according to the invention, the above-mentioned elastic member is provided on the side wall of the circuit board mounting portion of the housing against the elastic force of the elastic member provided between the circuit board and the housing. Since it has an integrated structure with an elastic locking piece that locks and holds the circuit board, there is no need to use any screws or the like.
By simply press-fitting the circuit board into the housing, the circuit board can be easily and securely fixed in the housing using the elastic locking pieces. The circuit board does not move during the work of attaching parts, improving the workability of assembling the module.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing the module structure of a conventional electronic watch, Fig. 2 is an exploded perspective view of the module structure according to this invention, and Fig. 3 A, B, and C show the assembly procedure of Fig. 2. It is a sectional view of a line. 20...First housing, 20a...Storage wall, 23...Terminal plate, 26...Electrode plate, 27...
Switch spring, 29... Circuit board, 30...
...Elastic locking piece.

Claims (1)

[Claims for Utility Model Registration] A housing made of synthetic resin and having opposing rising parts formed on the upper surface, and a housing having an external shape comparable to the inside of the rising part of the housing, and which is attached to the inside of the rising part. a circuit board; an electrically connecting elastic member attached to the housing so as to be positioned on the lower surface of the circuit board and in elastic contact with the circuit board; and an elastic member for electrical connection attached to the upper surface of the circuit board inside the rising portion of the housing. a display panel, and a locking piece is integrally formed on the inner wall of the rising portion of the synthetic resin housing at a position to lock and hold the circuit board against the elastic force of the elastic member. The modular structure of an electronic clock is formed in