JPS6026419Y2 - switch - Google Patents

Description

[Detailed description of the invention] This invention relates to a switch that operates a control board by pressing a button.The purpose of this invention is to provide a crisp click feeling when operating a button using a simple leaf spring structure. It is in.

In the conventional switch structure of this type, a coil spring is interposed between the button and the case, and when the button is pressed, it is not possible to obtain the so-called click feeling when the switch is turned on.

In addition, using a leaf spring as a contact plate with a micro switch, etc.
There have been some cases where the spring force is used to reverse the movement, but the structure was complicated.

The present invention aims to provide a click feeling with a simple structure using a contact plate and a separate leaf spring, and an embodiment thereof will be described below.

In the figure, 1 is the case of the select switch, 2 is the base, 3 is a button held by the case 1, 4 is a spring fixed to the button 3, and when the button 3 is pressed, the contact plate 5 is pressed and fixed. It is brought into contact with the contact piece 6 to obtain an electrically ON operation.

Reference numeral 7 denotes a holding portion for the contact plate 5, which is provided integrally with the base 2.

Reference numeral 8 denotes a holding portion for the fixed contact piece 6, which is also provided integrally with the base 2.

9 is a leaf spring inserted between button 3 and case 1;
0 is the rubber sheet provided on the surface of case 1, 11 is case 1
A drainage hole 12 is a groove similarly formed in the case 1, and is provided from around the button 3 to the bottom surface of the case 1.

Here, the case 1, base 2, button 3, and spring 4 are made of an electrically insulating material, preferably a synthetic resin material with good moldability, and have a bottom shape.

Reference numeral 13 denotes a guide part for holding the button 3, which is integrally formed with the button 3, and is slidably inserted into a cylindrical holding part 14 which is integrally formed with the case 1.

The guide portion 13 has an end portion located inside the case 1 divided into two parts.

13a indicates the divided portion.

Reference numeral 15 denotes a protrusion formed at the tip of the guide portion 13 so as to protrude laterally. When the guide portion 13 is inserted into the holding portion 14, the tip side of the guide portion 13 deforms toward the divided portion 13a side, and the insertion is prevented. When this is completed, the protrusion 15 is engaged with the opening end surface of the holding part 14 on the inner surface of the case 1 by the elasticity of the guide part 13, and is prevented from being removed.

16 is a convex portion provided on the side surface of the wing 4.

The leaf spring 9 is curved in a substantially U-shape and has a substantially rectangular shape with a hole 9a in the center through which the guide portion 13 is inserted, and is protruded from the upper surface of the case 1 with a chevron-shaped radius. A straight portion 18 at the peripheral edge is in contact with the protrusion 17 .

The four corners of the leaf spring 9 are in contact with the protrusions 3a provided on the lower surface of the button 3, and its springiness allows the button 3 to be operated crisply and with a quick feel.

Reference numeral 19 denotes a recess formed in the divided part 13a of the guide part 13 of the button 3, into which the convex part 16 provided on the spring 4 is fitted when the upper part of the spring 4 is inserted into the divided part 13a. Make sure that it is securely fixed.

Further, a protrusion 15 is provided on the guide portion 13 so that the protrusion 15 and the inner surface of the case 1 come into contact with each other at a dimension d in FIG. 3 when the button 3 is returned to its free position by the leaf spring 9. By doing so, even though the button 3 and the spring 4 are firmly fixed by fitting, it is possible to prevent force from acting on the spring 4 to remove it, and it is possible to provide a high-quality select switch.

FIG. 5 shows details of the leaf spring 9, and 20 indicates the four corners of the leaf spring 9, each of which is rounded at its tip.

Further, the width T2 at the center is narrower than l1lp□ at each of the four corners 20.

As described above, the leaf spring 9 is bent into a substantially U-shape, and the leaf spring 9 is
Push the four corners 20 of the button 3 in the direction of arrow A with the protrusion 3a of the button 3, and press the rounded chevron-shaped protrusion 1 provided on the case 1 side.
By pushing the straight part 18 in the direction of the arrow opening with 7,
The rounded part of the leaf spring 9 will be reversed, and the button 3 will be pressed.
It gives a click feeling when operated, and has the same force as a normal coil spring to return the button 3 to its original position.

Further, by providing a radius at the portion where the four corners 20 of the leaf spring 9 contact the protrusion 3a of the button 3, the sliding at this contact portion becomes smooth.

Furthermore, by making the width T2 at the center narrower than the width T1 between the four corners 20 of the leaf spring 9, the gap between the button 3 and the leaf spring 9 becomes wider at the center, and the leaf spring 9 is prevented from moving by the button 3. I never get caught.

As described above, according to the present invention, an extremely simple structure in which a substantially U-shaped leaf spring is interposed between the button and the case ensures a reliable on/off feel (quick feeling) when operating the button. can be obtained and operational reliability can be improved.

Furthermore, the leaf spring can be obtained by simple processing such as punching and bending, and the hole in the center only needs to be large enough to pass through the guide part of the button, and high precision is not required in terms of dimensions, improving productivity. Excellent assembly heat resistance.

[Brief explanation of drawings]

Fig. 1 shows a switch according to an embodiment of the present invention, Fig. A is a plan view, Fig. B is a sectional view, Fig. 2 is an exploded perspective view of the main parts, and Fig. 3 shows the button. Figure A is a bottom view, Figure B is a sectional view taken along line X-X' of Figure A, Figure C is a sectional view taken along AY-Y' line, Figure 4 shows the wing, 5 is a plan view, B and C are a side view, FIG. 5 is a leaf spring, A is a bottom view thereof, and B is a view taken in the Z direction of A. 1...Case, 3...Button, 9...
...Plate spring, 17...Protrusion, 18...
・・・Straight line part, 20...Four corners.

Claims (1)

[Scope of utility model registration request] A switch that operates a contact plate by pressing a button, the switch having a center portion between the button and a case having a holding portion that slidably holds a guide portion provided on the button. Approximately U with a hole through which the guide part of
A letter-shaped leaf spring is interposed, and the four corners of the leaf spring are brought into contact with the bottom side of the button, and the straight part of the leaf spring is brought into contact with a protrusion provided on the top side of the case, and when the button is pressed, the plate is pressed. Ta so that the spring is reversely deformed in the opposite direction.
A switch that does.