JPH0336944Y2 - - Google Patents

Description

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

[Prior art and its problems] Conventionally, the synthetic resin frame (housing) that makes up the module of an electronic wristwatch has a flat dial mounting surface on the top, and a storage area that can accommodate the electronic components that make up the watch module. A section is formed inside. For this reason, the frame is generally thicker on the side where the dial is attached, and the other side is mainly open so that modular parts can be assembled.

However, if there is variation in wall thickness on the dial mounting surface of the frame, when the synthetic resin solidifies during frame molding, the shrinkage rate of the thick resin increases, increasing the distortion of the entire frame. However, there was a problem in that the frame body warped after being molded.

Therefore, as shown in FIG. 4, due to the structure of the frame 13, this warpage occurs on the mounting surface side of the dial 14, and the periphery of the frame 13 on the dial mounting surface is high and the center is low. This results in a gap 15 between the dial 14 and the frame 13. For this reason, the dial cannot be attached flatly and closely to the upper surface of the frame. In particular, in the case of an analog movement in which the internal mechanism assembled to the frame has a pointer 16, since the pointer 16 is attached to a position just above the top surface of the dial 14, if the frame 13 is deformed, the pointer 16
This has the disadvantage that the dial 14 touches the dial 14.

[Purpose of the invention] This invention was made in view of the above-mentioned circumstances, and its purpose is to reduce the warping of the frame made of synthetic resin, and to improve the design of letters that can be attached to the top surface of the frame. The present invention aims to provide a modular structure for an electronic wristwatch in which the adhesion of plates can be accurately maintained.

[Main points of the invention] In order to achieve the above-mentioned purpose, the gist of this invention is to form a recess in the dial mounting surface on the upper surface of the synthetic resin frame to reduce the thickness of the frame. .

[Example] Next, an example of this invention will be described based on the drawings.

Fig. 1 is a plan view of a frame body (housing) made of synthetic resin that constitutes the module of a wristwatch, viewed from the dial mounting surface side. This frame 1
It is shown installed in the . Further, this module configuration applies to a combination watch that includes a digital display section and an analog display section on a flat surface.

As is clear from the cross-sectional views shown in FIGS. 2 and 3, the frame 1 is provided with a thick portion 2 on the upper surface of the frame 1, which is the dial mounting surface. The thick part 2 is formed with a thin part 2a and a thick part 2b having appropriate shapes corresponding to the parts to be housed in the frame 1 and the parts to be assembled into the frame 1.

Then, for the thick portion 2b, the thick portion 2
A recess 3 is provided on the top surface to make the thickness of the thin portion 2a substantially equal to that of the other thin portion 2a.

In addition, in the illustration, the reference numeral 4 indicates a battery;
5 is analog movement, 6 is liquid crystal display panel, 7 is interconnector, 8 is crystal oscillator, 9 is
10 is a circuit board, 11 is a circuit component such as a capacitor chip, and 12 is a pointer shaft to which pointers such as hour and minute hands are attached.

On the other hand, the frame 1 includes a hole 1a for housing the analog movement 5, a window hole 1b for housing the liquid crystal display panel 6, and holes 1c and 1d for press-fitting the leg pins of the dial plate.
etc. are provided.

[Effects of the invention] As explained in detail above, this invention forms a recess on the dial mounting surface of the synthetic resin frame,
By reducing the thickness of the frame on the dial mounting surface side by the recess, warping of the frame itself after molding can be significantly prevented without changing the shape of the frame.

Therefore, according to this invention, since the warpage of the synthetic resin frame can be accurately reduced, the dial can be reliably attached to the frame, and the protruding length of the pointer shaft relative to the frame can be set short. This will greatly contribute to making electronic wristwatches thinner.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, in which Fig. 1 is a plan view of a frame incorporating module components, Fig. 2 is a cross-sectional view taken along the - line shown in Fig. 1, and Fig. 3 is a cross-sectional view of the frame shown in Fig. 1. FIG. 4 is a side view of a conventional frame body with a dial attached thereto. 1...frame body, 3...recessed part.

Claims (1)

[Scope of utility model registration request] A frame body made of synthetic resin that houses an analog movement and has a first hole in which a pointer shaft of the analog movement is disposed and a second hole in which a display panel is disposed, and a frame body disposed on the upper surface of the frame body. A modular structure of an electronic wristwatch having a dial dial, wherein a recess is formed between the first hole and the second hole on the upper surface of the frame to reduce the thickness of the upper wall. The modular structure of an electronic wristwatch.