JPS6130229Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a fixing device for a crystal unit which is an oscillation source of an electronic timepiece.

Wristwatches and living things have traditionally been required to be highly durable, and in fact, they have been made smaller and thinner in this direction. Even with today's crystal oscillation electronic watches, this will not change at all. In terms of robustness, the issue with crystal oscillation electronic watches is the impact resistance of the crystal unit. Current crystal units are only a few tens of microns thick, so if the crystal unit itself receives a shock, it should not hit other parts inside the watch or the case, causing damage to the crystal unit. Fixed. Methods for this include fixing the crystal unit by providing a member to hold it down, or fixing it to the circuit board with adhesive. Although this method is excellent in terms of impact resistance, it has problems in terms of cost. For example, if a separate member is provided, screws and pins are required to secure it, and bonding poses problems with adhesive flow and workability.

The purpose of this invention is to eliminate the above-mentioned drawbacks, and to fix the crystal unit with excellent impact resistance and at low cost, without having to fix the crystal unit with new parts or using adhesives. That is.

An embodiment of the present invention will be described with reference to FIGS. 1 and 2. Reference numeral 1 denotes a liquid crystal panel, which is electrically connected to a circuit board 3 through a connector 2. As shown in FIG. 4 is a panel presser which presses down the liquid crystal panel 1. Reference numeral 5 denotes a panel frame, which is made of resin and serves as a stand for the panel presser 4, as well as a guide hole 5a for the connector 2, a guide wall 5b for the liquid crystal panel 1, and an escape hole 5c for the crystal unit 6.
, and a thin wall portion 5d is provided in a part of the escape hole 5c,
By being deformed by the crystal unit 6 during assembly, it has the function of pressing the crystal unit 6 toward the circuit board 3. Crystal unit 6
The lead wire 6a is inserted into the hole 3a of the circuit board 3 and soldered on the base plate 7 side. Numeral 8 is a screw that fixes the panel presser 4, panel frame 5, circuit board 3, and base plate 7.

As described above, according to the present invention, the cost can be reduced because existing parts are used to fix the crystal unit without adding new members for fixing the crystal unit. Further, when an adhesive is used, it is possible to prevent a decrease in yield due to the flow of the adhesive and an increase in costs due to a decrease in workability. Furthermore, since the resin has spring properties and is pressed down, it has great effects such as obtaining excellent impact resistance.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the present invention, and FIG. 2 is a sectional view of the main part of FIG. 1. 1...Liquid crystal panel, 2...Connector, 3...Circuit board, 4...Panel presser, 5...Panel frame, 5
d...Thin wall part, 6...Crystal unit, 7...Main plate.

Claims (1)

[Scope of utility model registration request] In a clock display section in which a display panel such as a liquid crystal is installed on a circuit board via a frame member, an opening for positioning a crystal unit that serves as a clock time standard is provided in the frame member extending outward from the display portion of the display panel. A device for fixing a crystal unit of a watch, characterized in that a thin wall portion having elasticity for pressing the crystal unit toward a circuit board side is formed integrally with the frame member in the opening portion facing the display panel side.