JPS6029912B2 - Electronic clock switch structure - Google Patents

Description

[Detailed description of the invention] The present invention relates to a switch structure for an electronic timepiece.

Conventionally, in electronic watches, external operating members such as switch operation buttons provided to correct the time system are insulated from the switch terminals of the correction circuit when the switch is off, and the insulation means is adhesive bonded to the movement. A means of maintaining a constant distance between the switch operation button and the switch terminal using a switch return spring, or a means of maintaining a constant distance between the switch operation button and the switch terminal by installing a switch return spring on the watch case side. Either of these has been taken. In the former case, the same number of switch return springs as the number of switch operation buttons is required, and each switch return spring must be configured to be electrically connected to one side of the power supply voltage. , the assembly cost is high,
Furthermore, due to layout constraints, it was not possible to provide a switch operation button at an arbitrary position. Even in the latter case, it goes without saying that the same number of switch return springs as the number of switch operation buttons is required, and in addition, in order to use a coil spring in the pulp installed on the watch case side as a switch return spring. The disadvantage was that the pipe diameter became larger and the watch case also became thicker. SUMMARY OF THE INVENTION In order to solve the above-mentioned drawbacks, an object of the present invention is to provide a metal slope member that is attached to cover almost the entire surface of a watch movement and has a plurality of spring parts formed on its outer periphery for engaging with a switch operation button. The purpose of the present invention is to provide a switch structure for an electronic watch.

Embodiments of the present invention will be described below based on the drawings. FIG. 1 is a plan view showing a metal plate member of the present invention, FIG. 2 is a sectional view taken along the line AA in FIG. 1 to 3, the metal slope member 1 has spring parts la, lb, and lc formed on its outer periphery, and the tips of the spring parts la, lb, and lc are attached to the watch case 13. Switch operation button 2
, 3, 4 are provided with bent portions ld, 16, lf in order to press the switch operation buttons 2, 3, 4 outward with a constant force by the spring force of each spring portion la, lb, lc.

Furthermore, metal plate members 5 having different spring constants are integrally laminated on the metal slope member 1 by welding or the like, and the metal plate members 5 have fixed buttons for switch operation buttons 2, 3, and 4. In order to provide a returning force, stopper portions 5a, 5b, 5c are provided as representatively shown in FIG. ing. The metal plate members 1 and 5 having an integrally laminated structure are attached to the timepiece movement 12 by screws or the like so as to cover almost the entire surface of the timepiece movement 12. Therefore, spring portions la, lb, and lc can be provided at the positions of the switch operation buttons 2, 3, and 4. As shown in FIG. 3, when the switch operation button 2 is not pressed, the bent portion ld is insulated from the switch terminal 7 connected to the circuit board 6 by a gap 8, and when the switch operation button 2 is pressed, the bending portion ld can be bent. As a movable arm of the switch, the terminal ld electrically contacts the switch terminal 7 and performs operations such as time adjustment. Further, the switch terminals (not shown) corresponding to the bent portions le and lf are also connected to the bent portion ld and the switch terminal 7.
It has a similar relationship with Further, a battery holding spring 10 for supporting the battery 9 is rotatably fixed to the metal plate member 1 by a bracket 11. The battery 9 is fixed by a battery holding spring 9, and the positive electrode 9a of the battery 9 is electrically connected to the circuit board 6 through the metal plate members 1 and 5 and further through the bent portions 5d and 5e of the metal slope member 5. There is.
In addition, in order to improve reliability, 5f and 5g are applied to the metal plate member 5.
The positive electrode 9a is taken from the side of the battery 9 by the bent portion. The metal plate members 1 and 5 are the circuit board 6.
It also has the function of holding and electrostatic shielding, and also mechanically reinforces the clock movement 12.
Holes or notches formed in the metal plate members 1 and 5 also position and hold timepiece components.
In addition, the spring parts la, lb, and lc of the metal plate member 1 require a large force (approximately 250 g) to return the switch operation buttons 2, 3, and 4, and to prevent malfunctions. The spring portions 5d, 5e, 5f, and 5g of the slope member 5 only need to be electrically connected to the circuit board 6 and the battery 9, respectively, and the spring force may be as low as 4. As explained above, according to the present invention, the watch case does not need to be equipped with a return spring for the switch operation button, so the case can be made thin and the return springs for the plurality of switch operation buttons and the switch can be moved. By integrally forming multiple spring parts that also serve as contact pieces on a metal plate member, manufacturing costs can be reduced and grounding can be easily achieved, and the shape of the return spring part is limited to the part that corresponds to the external operating member. The formation of the rising portion has the effect of providing a large spring force and preventing malfunctions, etc., and plays an important role in making watches thinner.

[Brief explanation of drawings]

FIG. 1 is a plan view showing a metal plate member of the present invention, FIG. 2 is a sectional view taken along the line AA in FIG. 1, and FIG. 3 is a sectional view of a main part of a timepiece movement incorporating the metal plate member. 1, 5...Metal plate member, la, lb, lc.
...Spring part, 2, 3, 4...Switch operation button, 5a, 5b, 5c...Stopper part, 7...Switch terminal, 12...Clock movement, 13.
...Watch case o Figure 1 Figure 2 Figure 3

Claims (1)

[Scope of Claims] 1. A metal plate member disposed to cover almost the entire surface of the back cover side of a timepiece movement having a circuit board, etc., the metal plate member being disposed on the timepiece movement. The watch has a spring portion that faces the switch terminal and engages with an external operating member attached to the watch case, and the spring portion includes an arm-shaped spring portion extending from the metal plate member and the external operating member. an engaging bent portion is formed, the arm-shaped spring portion is formed substantially parallel to a main portion of the metal plate member, and the bent portion is bent at a position corresponding to the external operating member; Furthermore, the switch structure for an electronic timepiece is characterized in that the spring portion has a return spring function for the external operating member. 2. The electronic timepiece switch structure according to claim 1, wherein a plurality of spring parts are integrally formed on a metal plate member.