JPS6215946Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a switch used in a thin digital watch or the like.

(Prior art) In a slide type switch according to the prior art, one protrusion is provided vertically at the center of the lower surface of the sliding body (knob), and on both sides of this sliding body, there are projections perpendicular to the sliding direction of the sliding body. Two small protrusions are provided protruding in the direction, and a hole and a small hole are provided on the spring piece to fit each of the protrusions and the small protrusion, and the spring piece is welded and engaged with the protrusion and the hole. There are known spring pieces that are fixed to a sliding body and that have small protrusions and holes that prevent the spring pieces from spinning idly (for example, Japanese Patent Laid-Open No. 53-86481).
Publication No.).

(Problem to be solved by the invention) According to the prior art, a small protrusion is provided for the protrusion of the sliding body, and a small hole is provided for the hole of the spring piece in a direction perpendicular to the sliding direction of the sliding body. Therefore, widening the distance between the position of the small protrusion or hole and the position of the protrusion or hole increases the detent effect of the spring contact piece and improves the positioning accuracy, but the width of the spring piece becomes wider and the spring piece itself becomes It becomes large and becomes an obstacle to downsizing the switch. On the other hand, if you narrow the distance between the small holes,
The positioning accuracy of the spring pieces tends to be low. Therefore, there was a limit to the miniaturization of the switch.

Therefore, the purpose of this invention is to ensure that the spring contact piece does not rotate, improve positioning accuracy, and
Another object of the present invention is to provide a small-sized switch that can streamline assembly work.

(Means for Solving the Problems) In order to achieve the above object, the features of the present invention are that mounting protrusions and guide protrusions are formed on the sliding body along the sliding direction, and notched grooves are formed on the spring piece. The purpose of the present invention is to form a bifurcated spring piece with a forked spring piece, and to prevent the spring piece from rotating by engaging a guide protrusion in the notch groove.

(Function) According to this configuration, the guide protrusion can be engaged with the notched groove for making the spring piece into a bifurcated shape to prevent the spring piece from rotating, so a special hole for preventing rotation can be provided in the spring piece. No need to form.

(Example) Examples of the present invention will be described below with reference to the drawings.

In FIG. 1, an operating knob 2 is integrally formed on the upper surface of a sliding body 1 made of synthetic resin, and guide portions 3 are integrally formed on both sides of the lower mounting surface. The knob 2 projects outward from an elongated guide hole 4a formed in the frame 4, and the guide portions 3, 3 are positioned so as to be slidable on the circuit board 11. Thereby, the sliding body 1 can be slid in the direction of the arrow by operating the knob 2. As shown in the second figure, a rod-shaped mounting projection 5 is provided on the lower surface of the sliding body 1, and on the left side of this mounting projection (FIG. 1), there is a planar elliptical guide projection. 6 are integrally formed at regular intervals. The mounting protrusion 5 and the guide protrusion 6 are the guide part 3,
3, in a straight line, that is, along the sliding direction of the sliding body 1.

A rear end portion of a spring contact piece 7 is fixed to the mounting projection 5. The shape of this spring contact piece has a mounting hole 8a at the center of the mounting part 8 at the rear end as shown in the third figure, and a fork-like shape extending from this mounting part toward the distal end. A spring piece 9 is bent, and a notched groove 1 extends from the tip in the longitudinal direction in the center of the spring piece.
0 is punched out.

By the way, in order to attach the spring contact piece 7 to the sliding body 1, the guide protrusion 6 of this sliding body is engaged with the notch groove 10 of the spring piece 9, and at the same time the mounting protrusion 5 is inserted into the mounting hole 8a of the spring contact piece 8. By melting the tip of this attachment protrusion, the spring contact piece is fixed to the lower surface of the sliding body 1. The tip of the spring contact piece 7 is slidable on a fixed contact piece 12 provided on the upper surface of the circuit board 11 as shown in the first figure.

(Effects of the invention) As described above, the present invention has a structure in which the mounting portion of the spring contact piece is fixed to the sliding body with one fixing projection, and the guide projection is engaged with the notch groove of the spring contact piece. As a result, the distance between the guide protrusion and the mounting protrusion can be set larger, and the rotation of the spring contact piece can be reliably prevented. On the other hand, despite this, the width of the attachment part of the spring contact piece can be significantly reduced.
Therefore, the switch can be made smaller. Furthermore, as mentioned above, since the distance between the mounting protrusion and the guide protrusion can be set large, it becomes easier to fit the mounting protrusion and the mounting hole, making it possible to improve the efficiency of the switch assembly work. The above effect is significant.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a sectional view of a switch, FIG. 2 is a perspective view showing the bottom structure of a sliding body, and FIG. 3 is a perspective view of a spring contact piece. DESCRIPTION OF SYMBOLS 1...Sliding body, 5...Mounting protrusion, 6...Guiding protrusion, 7...Spring contact piece, 8...Mounting part, 8a...
...Mounting hole, 9...Spring piece, 10...Notch groove.

Claims (1)

[Claims for Utility Model Registration] The sliding body that can be operated from the outside has a mounting projection and a guide projection integrally formed along the sliding direction, and the mounting portion of the spring contact piece has the above-mentioned mounting projection. A mounting hole into which the projection is fitted and fixed is provided, and a bifurcated spring piece having a notched groove with which the guide projection engages extends from the mounting portion. A switch to do.