JPS5814622B2 - electronic clock - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic timepiece, and provides an electronic timepiece that is easy to assemble and has high reliability.

Recently, methods for assembling electronic watches with liquid crystal displays have been devised that are easy to assemble and do not require many man-hours, or methods that reduce the number of parts.

FIG. 1 shows a cross section of an electronic timepiece designed to reduce the number of assembly steps.

This electronic watch includes a liquid crystal panel 1 for displaying time, an integrated circuit 2 for driving the liquid crystal display panel, an electronic circuit board 4 on which other parts 3 are mounted, and a power battery 5 serving as a driving power source. It is composed of an insulating frame 6 having a recessed portion in which it can be stored or placed.

Further, the insulating frame 6 is provided with a recess 7 for accommodating the night crystal display panel 1 and a recess 8 for accommodating the power source battery 6, respectively.

To assemble the electronic timepiece constructed as described above, first, holes or screw holes for fixing the electronic circuit board 4 are made in the insulating frame 6.

Next, the liquid crystal display panel 1 is stored in the liquid crystal display panel storage recess 7 of the insulating frame 6, and the liquid crystal display panel is placed on the external terminal of the liquid crystal display panel.
A connecting body 9, such as conductive rubber, is installed for connection to the drive circuit.

An electronic circuit board 4 for driving a liquid crystal display panel is placed thereon with good alignment, and the insulating frame 6 and electronic circuit board 4 are fixed with fixing screws 10.

Next, an electrode plate 11 for extracting the electrical energy of the power battery 5 into the electronic circuit board 4 and the electrode storage recess 8 of the insulating frame 6.
Then, the electrode plate is fixed to the insulating frame 6 via the electronic circuit board 4 using the electrode plate fixing screws 12.

A power battery is placed on the electrode plate 11, and the other electrode plate 13 is placed and fixed with screws 14 to complete the process.

A finished product is obtained through the above assembly process, but this assembly method has the following problems.

1. The number of parts is large and the number of assembly steps is large.

2. It is necessary to make many holes or screw holes in the insulating frame.

3. Strict alignment of the insulating frame and electronic circuit is required.

4. If you remove the back cover from the back of an electronic watch and look inside the watch body, you will see parts mounted on the electronic circuit board, which is not aesthetically pleasing.

5. If the insulating frame is formed by resin molding or the like, the frame may be destroyed by a strong impact such as a fall.

Therefore, the present invention aims to reduce the number of parts and assembly man-hours, improve the aesthetic appearance of the inside of the timepiece body, and provide an electronic timepiece with high reliability such as shock resistance.

That is, the electronic timepiece of the present invention combines an optical display panel for displaying the time in one recess of an insulating note frame having a plurality of recesses and an electronic circuit for driving the optical display panel 1. Easy to install, connect, and store power batteries or other parts in other recesses. The power supply battery, the electronic circuit for driving the liquid crystal display panel, and the liquid crystal display panel are also fixed in the same manner.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An electronic wristwatch according to an embodiment of the present invention will be described below with reference to the drawings.

This is an example of an insulating frame 21 used in an electronic wristwatch.

Usually, the above-mentioned frame uses a resin that is relatively easy to mold, such as polypropylene resin or ABS resin, so it is easy to form a recess or a cutout on the frame.

However, molding screws is difficult and tedious.

Therefore, a hole smaller than a screw hole is first formed, and after molding, a screw is formed using a jig such as a tap.

It is also desirable to have as few screw holes as possible.

This insulating frame 21 has a recess 2 that accommodates the liquid crystal display panel 1 and an electronic circuit for driving the liquid crystal display panel 1.
3. It has a structure consisting of a cutout 24 for attaching an electrode plate for extracting battery energy from the power battery 5, and a screw hole 25 for fixing the electrode plate.

The part for checking the time display is done through the passage hole 26.

FIG. 3 is a sectional view taken along the line ■-■ in FIG. 2.

FIG. 4 is an example of an electrode plate of a power supply battery used in an electronic wristwatch according to an embodiment of the present invention.

This electrode plate 31 is made of an elastic metal plate, and has a claw 32 that fits into the defective part 24 of the wire-insulating frame 21,
Liquid crystal display panel, driving electronic circuit board 4 Further, it has a convex elastic part 33 for fixing the liquid crystal display panel 1, and has a passage hole 34 into which a fixing screw is inserted at a position symmetrical to the claw 32. It has become.

FIG. 5 is a temporary sectional view taken along the line v-v' of the electrode shown in FIG.

FIG. 6 is a cross-sectional perspective view of the electrode plate shown in FIGS. 4 and 5. FIG.

FIG. Y is a sectional view of the inside of the timepiece body of an electronic wristwatch according to an embodiment of the present invention, and the same parts as in FIG. 1 are given the same numbers.

Now, to explain the assembly of this watch, a liquid crystal display panel 1, an electronic circuit board 4 for driving the liquid crystal display panel 1 provided on the liquid crystal display panel 1, A connecting body 9 made of conductive rubber or the like is installed to connect the night crystal display panel 1 and the electronic circuit board 4.

A power source battery 5 is installed in the recess 23.

The recess 22 of the insulating frame 24 into which the liquid crystal display panel 1 and the electronic circuit board 4 are inserted is formed to have a depth of 10% to 30% thicker than the sum of the thickness of the liquid crystal display panel 1 and the thickness of the electronic circuit board 4. I'll keep it.

Next, an electrode plate 40 that connects the electronic circuit board 4 and the power battery 5
are connected to the electronic circuit board 4 in advance by a method such as soldering 41, and are inserted together when the electronic circuit board 4 is housed in the frame 21.

Subsequently, the power supply battery 5 is housed in the recess 23 as described above.

Furthermore, the above-mentioned electronic circuit board 4 is fixed, the metal plate 31 serving as one electrode plate of the power supply battery 5 is fitted into the insulating frame, and the other metal plate 31 is fixed with screws 43.

At this time, the convex portion 33 of the metal plate 31 comes into contact with the electronic circuit board 4 and acts to push down the electronic circuit board 4, and the metal plate 31
1 and the electronic circuit board 4 and the electronic circuit board 4 and the liquid crystal display panel 1 can be more securely connected.

FIG. 8 shows another specific example of a metal plate that serves both as a battery electrode and as a fixing member for use in the present invention.

The metal plate 51 in FIG. 8a is in contact with the power battery 5,
A protrusion 62 is provided.

The metal plate 61 in FIG. 8b has a thin plate spring 62 connected to the part where the power battery 5 contacts the electrode plate by means such as welding to achieve more stable contact with the battery.

The metal plate 71 shown in FIG. 8C is a metal plate itself processed to form a connection part 72 to make the contact part with the power battery strong and complete.

FIG. 9 shows that a metal plate 81, which serves as an electrode plate used in the electronic timepiece of the present invention and also serves to fix the night crystal display panel and the drive electronic circuit board, is formed as a leaf spring and is bent into an arched shape. When the inside of the watch body is erected, the bow shape is reversed and the elasticity of the leaf spring itself fixes the liquid crystal display panel 1, drive electronic circuit board 4, and power source battery 5, as shown in FIG.

Note that the arcuate leaf spring is also provided with a convex portion 33 and a thin leaf spring 62 for improving contact with the power source battery.

Moreover, this metal plate 81 can be attached to the frame 21 without using screws.
This makes assembly even easier.

As described above, according to the electronic timepiece of the present invention, (1) the number of parts can be reduced, resulting in lower assembly costs.

(2) Work such as cutting screws and drilling holes into the frame body is reduced, and the production of molds for the frame body becomes simple and costs can be reduced.

(3) The liquid crystal display panel and electronic circuit board can be easily aligned, improving assembly speed.

(4) Even if the back cover is removed, only the metal plate can be seen from the back side, resulting in a solid structure and great decorativeness.

(5) The metal plate serves to reinforce the entire watch body, improving reliability.

It has excellent effects.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the interior of a conventional electronic wristwatch, and FIG. 2 is a plan view of an example of an insulating frame used in the electronic wristwatch of the present invention.
3 is a cross-sectional view taken along line II-II in FIG. 2, FIG. 4 is a plan view of an example of a metal plate used in the electronic timepiece of the present invention, and FIG. 5 is a cross-sectional view taken along line v-v' in FIG. 6 is a cross-sectional perspective view of the metal plate of FIG. 4, FIG. 7 is an internal cross-sectional view of the wristwatch according to an embodiment of the present invention, and FIGS. 8 a to 8 c are cross-sectional views of the electronic timepiece of the present invention. 9 is a cross-sectional view of another specific example of the metal plate used, FIG. 9 is a plan view of still another specific example of the metal plate used in the electronic watch of the present invention, and FIG. 10 is a sectional view of another specific example of the metal plate used in the electronic watch of the present invention. FIG. 2 is a cross-sectional view of an electronic wristwatch assembled by 1...Liquid crystal display panel, 4...Electronic circuit board, 5...Battery, 21...Insulating frame, 22. 23... recess, 31, 51
, 61, 71. 81...Metal plate, 33...
...Protrusion.

Claims (1)

[Claims] 1. A liquid crystal display panel for time display, a liquid crystal display panel, driving parts, etc. are stacked and stored and mounted in a recessed part of an insulating frame, and a power battery part that serves as a driving power source is placed in the other part of the insulating frame. An electronic timepiece, characterized in that the electronic timepiece is housed and mounted in a recessed part, each of the parts is fixed by the same metal plate, and the metal plate is used as one power terminal of the power supply battery.