JPS587561Y2 - push button switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a push button switch in which the push button is pressed in a snap action due to the action of the elasticity of a spring material and the attraction force of a magnet.

Conventional push-button switches that perform snap-action operations have complex structures such as combining multiple springs.
Therefore, there are problems in that the number of parts is large and the number of assembly steps is large.

The purpose of the present invention is to solve the above-mentioned problems and provide a push button switch having a snap action function, which has a small number of parts, is small, and is easy to assemble.

An embodiment of the present invention will be described below with reference to the drawings.

Figures 1A and 1B show the schematic structure of the push button switch according to the present invention, where A is the OFF state of the switch and B is the OFF state of the switch.
indicates the ON state of the switch.

In the figure, 1 is a plate-shaped magnet, 2 is a soft magnetic bar with its end 2' protruding from the magnet 1, and 3 is a soft magnetic bar arranged opposite to each other.
Reference numeral 4 indicates a leaf spring material attached to the end 2' of the magnetic bar 2, 4 a reed switch which is a switch element, and 5 a push button.

In Figure A, since no pressing force is applied to the push button 5, the magnetic bar 2 is attracted to the magnet 1.

Therefore, in this state, the magnetic field of the magnet 1 forms a magnetic circuit passing through the magnetic bar 2 as shown in the figure, and does not leak to the outside, so the reed switch 4 is not supplied with the amount of magnetic flux necessary for operation, and the switch is in the OFF state. It becomes.

From this state A, when a pressing force F is applied to the push button 5 and the spring material 3 is compressed, the magnetic bar 2 rotates at a predetermined angle about the fulcrum 2, creating a gap 2 as shown in Figure B.

In the state shown in Figure B, the magnetic field of the magnet 1 has a large magnetic resistance in the gap ■, so a magnetic circuit is formed as shown in the diagram, and the reed switch 4 operates with the amount of magnetic flux necessary for operation, and the switch It becomes ON state.

FIG. 2 shows a characteristic curve of the snap action when going from state A to state B in FIG. 1, where the vertical axis shows the pressing force F and the horizontal axis shows the stroke L of the push button 5.

That is, when the push button 5 is pressed down with the tip of a finger against the elasticity of the spring material 3 and the attraction force between the magnet 1 and the magnetic bar 2, the finger presses the push button () which increases in approximately proportion to the push button stroke.
While feeling the force (generated by the repulsive force of the spring material 3), the peak P, which is the maximum pressing force (equal to the pressing resistance force of the push button 5 due to the spring material 3 and the magnet 1), is reached, and when this piece P is exceeded, the magnetic bar 2 becomes the fulcrum. Since it rotates around (2), the pressing force decreases rapidly after the peak, and at this time, the feeling of the maximum pressing force at the peak remains on the fingertip, so it feels like the push button 5 is moving by itself. , you can press the button with almost no resistance at your fingertips.

Note that when the pressing force is released, the push button 5 is restored to its normal position due to the attraction force between the magnetic bar 2 and the magnet 1 and the restoring force of the spring material 3.

In push-button switches with such a snapping action characteristic, there is a sudden change in the pressing force during a portion of the push-button stroke, so the operator can clearly feel the switch action, causing a sense of anxiety and discomfort. It is very convenient to complete the switching operation without needing to do so.

Fig. 4 is a sectional view showing the specific structure of the push button switch according to the present invention, and Fig. 5 is a sectional view showing the broken line A in Fig. 4.
... is a sectional view seen in the direction of the arrow A'.

In the figure, reference numerals 6 and 6' indicate two molded switch bases, and magnetic bars 2 and 2 are provided on the opposing surfaces of the bases 6 and 6'.
four parts 8, 8' forming a rotation space 7; recesses 9, 9' which are deeper grooves than the four parts 8, 8' for storing and holding the magnet; and recesses 9, 9' for holding the reed switch 4. Recesses 10, 10' are formed.

Furthermore, a protrusion 11 is provided on the upper inner wall surface of the recesses 8 and 8', and the protrusion 11 and the magnet 1 engage the magnetic bar 2.
is held rotatably.

Furthermore, when the spring member 3 is at rest, the push button 5 is restored, and the push button 5 is at rest with the protrusion 12 at the lower end abutting against the switch bases 6, 6'.

In order to easily mount the reed switch 4 on a printed board, its node piece is bent at a right angle and pulled out.

13 is a through hole for integrating the bases 6, 6' with screws or the like.

In this push button switch, as described above, when the push button 5 is pressed, its operation becomes a snap action due to the spring material 3 and the magnet 1, and the magnetic bar 2 controls the flow of magnetic flux of the magnet 1 to open and close the reed switch. It is done.

As described above, according to the present invention, the snap action operation of a push button switch can be realized with a simple structure and a small number of parts.

In addition, the present invention has remarkable practical effects such as easy assembly, as it is only necessary to insert the integrated magnetic pole rod and spring material into a predetermined gap in the mold base.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a schematic structure of a push button switch according to the present invention, where A indicates the OFF state and B indicates the ON state. Figure 2 is a diagram showing the characteristic curve of the snap action, Figure 3 is a sectional view showing the specific structure of this pushbutton switch, and Figure 4 is a diagram showing the characteristic curve of the snap operation.
It is a sectional view taken in the direction of the arrow of the broken line A in the figure. In the figure, 1 is a magnet, 2 is a magnetic bar, 3 and 14 are spring materials, 4 is a reed switch which is a switch element, and 5 is a push button.

Claims (1)

[Scope of utility model registration request] A magnetic bar 2 and a reed switch 4 are arranged in parallel to a plate-shaped magnet 1, and by pressing a push button 5, the magnetic bar 2 is brought into contact with and separated from the magnet 1, thereby increasing or decreasing the leakage magnetic field of the magnet 1, thereby increasing or decreasing the leakage magnetic field of the magnet 1. In the push button switch in which the switch 4 is operated and restored, the magnetic bar 2 is provided so as to be attracted to the magnet 1 so that its end protrudes from the side end of the magnet 1, and the magnetic bar 2 is arranged so as to be rotatable about the protruding end of the magnetic bar of the magnet 1 as a fulcrum, and the magnetic bar 2 has a pressing portion pressed down by the push button 5 located on the protruding end of the magnetic bar 2. Attach the leaf spring material 3 arranged as shown, and press the push button 5.
When the protruding end is pressed down via the plate spring material 3, the magnetic bar 2 moves away from the magnet 1 and rotates around the fulcrum end of the magnet 1, which increases the The reed switch 4 due to leakage magnetic field
operates, and when the push-down blade is released, the magnetic bar 2 is attracted to the magnet l-1 and the push button 5 is returned to its original position via the leaf spring material 3, and the reed switch 4 is restored. Features a push button switch.