JPS6313290B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a watch switch mechanism.

Conventional switch mechanisms operated by the left and right rotation of the crown include a circuit block consisting of a switch spring, an integrated circuit, a crystal unit, etc., which performs left and right reciprocating motion by a cam that is rotated at the same time as the crown rotates. There are devices that perform left and right switch operations by contacting the lead terminals (pins, leaf springs, etc.) attached to the left and right sides, respectively, but switch springs are fixed to the base plate by being fixed to a substrate made of insulating material. The lead terminals are fixed to the circuit board of the circuit block by driving or soldering. In the switch mechanism according to the above method,
The two lead terminals on the left and right must be fixed to the circuit block, which hinders cost reduction as the circuit block requires a lot of man-hours as a component of an electronic watch. Since performing any of the above steps will lead to a decrease in the reliability of the circuit block, sufficient care must be taken in the process.

In order to eliminate the above-mentioned drawbacks, the present invention performs the left and right switch operations with a single switch spring member and brings the switch spring into direct contact with the lead pattern of the correction terminal on the circuit board, thereby reducing the number of parts and reducing costs. The purpose is to improve the reliability of circuit blocks by removing downs and pin holes on circuit boards.

Next, the structure of the present invention will be explained in detail with reference to FIGS. 1 and 2. 1 is a switch spring, 2 is an operating pin that is fixed (welded or caulked) to the switch spring 1, and 3 is a switch spring 1 connected to a guide pin 3a, 3.
This is an insulating switch seat guided by b and fixed by heat caulking 3c and 3d. The switch seat 3 has a guide pin 4 that serves as a guide when assembling it into the main plate.
5 is provided. The switch spring 1 has a T-shaped tip, the tips of both arms face the lead pattern 12b of the circuit board 12, and the rear end is parallel to the axial direction of the reuse winding stem. It is fixed to the base plate 6 via the seat 3.
The operating pin 2 is provided at the T-shaped intersection of the tip of the switch spring 1, one end of which is supported in a hole 12a drilled in the circuit board 12, and the other end of which is supported by a winding stem to rotate the switch cam which rotates left and right. Therefore, as the switch cam rotates, the operating pin 2 is tilted to the left or right using the support in the circuit board hole 12a as a fulcrum, and the tip of one of the arms of the switch spring 1 is placed in the circuit. Contact the lead pattern on the board surface. To further elaborate on this,
The operation will be explained with reference to FIGS. 3, 4 and 5. 6 is the main plate, and 7 is the horizontal hole 6 provided in the main plate 6.
The winding stem 7, which is supported by shafts a and 6b, has a corner 7a which engages with a corner 8a of the switch cam 8 to transmit the rotation of the winding stem 7. The winding stem 7 also has a switching part 7b, and the winding stem presser 9 having a spring force in the direction of arrow A rides over the chevron of the switching part to provide switching weight and to position the winding stem 7. When the winding stem 7 is pulled out, the switch cam 8 is moved to the time adjustment position 11 by a spring member 10 having a spring force in the direction of arrow B, and engages with the operating pin 2 of the switch spring. The actuating pin 2 is guided by an actuating pin guide hole 12a provided in the circuit board 12, and the reuse 1
When the switch cam 8 is rotated by rotating the switch cam 8, the switch spring 1, which is integrated with the inclined operating pin 2 as shown in FIG. Corrections will be made. Further, if the member for forming the guide hole of the actuating pin 2 is a conductive member, the present invention can be carried out by pushing in a bushing made of an insulating material.

As described above, according to the present invention, it is possible to perform left and right switch operations with one switch spring, thereby reducing the number of parts and reducing costs. In addition, a switch mechanism can be constructed by providing a single guide hole on the circuit board, which reduces costs by reducing the number of steps required for circuit blocks, and improves reliability by eliminating processes that cause a decrease in reliability as a circuit block. It will be effective if you try to improve it.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a switch block according to an embodiment of the present invention, FIG. 2 is a side view of FIG. A sectional view taken along line A-A' in Fig. 3, and Fig. 5 showing the operating state of the switch spring.
-A' sectional view. DESCRIPTION OF SYMBOLS 1... Switch spring, 2... Operating pin, 3... Switch seat, 4, 5... Guide pin for switch seat, 7... Winding stem, 8... Switch cam, 9... Winding stem presser, 10... Spring member, 12... Circuit board.

Claims (1)

[Claims] 1. A switch spring whose tip is formed into a T-shape, whose both arm tips are opposed to the switch lead pattern, and whose rear end base is parallel to the winding stem axis direction and fixed to the base plate via an insulating seat; An operating pin is fixed to the T-shaped intersection of the tip of the switch spring so as to maintain a spacing between the spring and the switch lead pattern, and is supported in a hole drilled in a plate material having the switch lead pattern, and the rotation of the winding stem. A switch mechanism for a timepiece comprising a switch cam that rotates and tilts the operating pin about its supporting part to bring the tip of one arm of a switch spring into contact with the lead pattern.