JPS6237351B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electronic timepiece, and particularly to a structure for storing electronic components within a timepiece body.

Conventionally, so-called electronic watches that display the time electronically using liquid crystals or light-emitting elements consist of a liquid crystal display panel or a light-emitting element panel, and a C-MOSLSI for electrically displaying the time. An electronic circuit, a package for mounting the electronic circuit, a crystal resonator, a resistor, and a capacitor for configuring the oscillation circuit, and a coil, resistor, and capacitor for supplying the driving voltage necessary for the liquid crystal display panel. It is composed of electronic components for a booster circuit including a power supply battery or a wiring board for mounting the components, a fixing jig, screws, and other components.

Among the electronic timepieces described above, the configuration of an electronic timepiece with a liquid crystal display will be explained in detail.

First, FIG. 1 shows the structure of a conventional liquid crystal display electronic timepiece having the above structure. There is a printed wiring board 4 on which electronic components such as a crystal resonator 1, a resistor 2, and a capacitor 3 are mounted, and a C-MOS LSI 6 for driving a liquid crystal display panel 5 is mounted on the wiring board 7. The substrate 4 and the substrate 7 are connected with a spacer 8 to maintain an arbitrary gap. Further, the liquid crystal display panel 5 is screwed and fixed to the substrate 7 using a panel fixing frame 9 and screws 10. Further, the power supply battery 11 has a structure in which it is screwed and fixed to the substrate 4 using an electrode fixing jig 12 and screws 13. 14
is a conductive elastic body for electrically connecting the electrodes of the C-MOS LSI 6 and the electrodes of the liquid crystal display panel 5.

In such a conventional configuration, like the components placed on the substrate 4, the components must be placed on a flat surface. This increases the flat area of the electronic watch, and furthermore, the structure in which the main electronic components are laminated to the substrate increases the thickness of the electronic watch, which causes a decline in its practical value. Ta. Also, jig 1 for deriving the electrode terminals of the battery.
2 or screws 13, etc., resulting in an increase in the number of parts and man-hours, which causes an increase in the price of the electronic watch.Furthermore, the increase in the number of parts and man-hours causes a decrease in reliability.

The present invention relates to the internal structure of an electronic timepiece body and the storage and installation structure of main electronic components, and is intended to provide an electronic timepiece that has a significantly reduced number of parts and man-hours, and is suitable for thinning and downsizing.

The structure of an electronic wristwatch according to an embodiment of the present invention will be explained with reference to FIG. The board 21 is a flexible wiring board. Here, this flexible wiring board will be explained in detail with reference to FIG.

This wiring board 21 has the structure shown in FIG. The thickness of the copper foil 32, 3 is 10 to 100 μm depending on the degree of flexibility.
3 has a thickness of about 5 to 100 μm, and the wiring pattern is formed on copper foils 32 and 33 using chemical etching technology.

Next, referring to FIG. 2, the substrate 21 has a crystal resonator 22, a capacitor 23, and a resistor 24 fixed by soldering, and a package 25 for a C-MOS LSI for driving a liquid crystal display panel is further soldered. A fixing hole 26 and a screw hole 28 for fixing the substrate 21 to the integrally molded frame body, that is, the base frame 27 are provided. The base frame 27 serves as a frame body for accommodating all the main parts of a so-called electronic watch made of molded resin such as Teflon, ABS, or polypropylene. The base frame 27 includes a hole 40 for inserting and installing the battery 29, a square hole 43 for embedding and storing the liquid crystal display panel 41 and the conductive elastic body 42, and a crystal resonator 22 by a method described later. There is a hole 44 in which the resistor 24 and capacitor 23 are buried. Hole 40,4
3 and 44 are arranged side by side on the base frame 27. FIG. 2 shows the parts required for the configuration and an exploded view.
1. Push in and install the conductive elastic body 42 and the bag cage 25, cover with the substrate 211, and fix with the screws 45 to complete the electronic wristwatch.

Next, FIG. 4 shows the structure of an electronic wristwatch according to another embodiment of the present invention, which is assembled by bending the flexible substrate 21.
This will be explained with reference to FIG. Figure 5a is arrow A in Figure 4a.
FIG. 5b is a sectional view taken along the line B--B' in FIG. 4a.

FIG. 4a shows a state in which the region 21 on which a predetermined electronic component is placed is bent. Fifth
Figure b shows the cross-sectional structure in the above-described state. As shown in FIG. 5a, the crystal resonator 22 can be mounted lower than the surface of the wiring board 21 by bending the wiring board 21 into a U-shape and soldering it to one surface of this portion. A resistor 24 and a capacitor 23 may be attached to the other surface as shown in FIG. 5b.

FIG. 4b shows a cross-section inside a watch body using the structure according to the invention. The portion bent perpendicularly to the substrate 21 is pushed into the hole 44 . Furthermore, the crystal oscillator 22 is buried and housed in the timepiece body, for example, lower than the surface of the substrate 21, so that the space utilization effect can be greatly improved.

As is clear from FIG. 4b, in this watch body, the main electronic components, such as a liquid crystal display panel, a battery, and a crystal oscillator, are arranged in storage holes arranged in parallel in the integrally molded base frame 27. It is stored in its original state, making it easy to assemble into the watch body and reducing the number of parts.In addition, the main parts, the liquid crystal display panel, battery, and crystal oscillator, are arranged side by side, making it easy to assemble into the watch body. It can be a clock.

Furthermore, since the wiring board 21 is installed on the frame 27, it is possible to easily interconnect each part using the board 21, which is suitable for simplifying the connection structure and facilitating assembly. be.

In the structure shown in FIG. 4b, the wiring board 21 is installed on the frame 27, and the wiring board 21
The thickness can be reduced to about 20 to 100 μm, making it suitable for making electronic watches thinner.

As described above, in the electronic watch of the present invention, the main large electronic components, such as a liquid crystal display panel, a battery, and a crystal oscillator fixed to a wiring board, are housed in three storage holes arranged in parallel in an integrally molded frame body. Therefore, it is easy to assemble the electronic components into the watch body, the structure inside the watch body is simple, the number of parts is small, and it is advantageous for further thinning. Furthermore, since the wiring board is installed on the frame and the electrical connection between the liquid crystal display panel and the wiring board is made using a conductive elastic material, it is easy to connect and assemble each part using the wiring board. This makes it suitable for small and thin electronic watches.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view of a conventional electronic wristwatch, Figure 2 is an exploded perspective view of a conventional electronic wristwatch.
The figure is an exploded perspective view of an electronic wristwatch according to an embodiment of the present invention, Figures 3a and 3b are cross-sectional views of the flexible substrate, and Figure 4a is the flexible substrate with some components attached. Fig. 5a is a side view taken from the direction of arrow A in Fig. 4a, and Fig. 5b is a sectional view taken along line B-B' in Fig. 4a. It is. 21...Flexible substrate, 22...Crystal resonator, 2
5...Crystal resonator, 25...IC package, 2
7... Base frame, 40, 43... Hole, 41... Liquid crystal display panel.

Claims (1)

[Claims] 1 First, second, and third storage holes are arranged in parallel in an integrally molded frame body, a liquid crystal display panel and a battery are respectively housed and installed in the first and second storage holes, and a crystal vibrator is mounted on the frame body. An electronic timepiece comprising: a wiring board to which a child is fixed; the crystal resonator is housed in the third storage hole; and a conductive elastic body is interposed between the wiring board and the liquid crystal display panel.