JP2906278B2 - Illuminated push button switch - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a so-called illuminated push button switch for mounting on a board, which is mounted on a circuit board with the push button exposed on an operation panel.

(Prior Art) As an illuminated push button switch, an operation unit having a push button and an illuminating mechanism is fitted and connected to a switch unit having a microswitch.
There is a configuration in which a terminal of an illumination mechanism incorporated in an operation unit is brought into contact with a board connection terminal that has been assembled in a switch unit in advance.

(Problem to be Solved by the Invention) The conventional push button switch has the following problems when used for mounting on a substrate.

In the case of board mounting, the switch unit is mounted and fixed on the circuit board, and the operation unit is mounted and fixed on the operation panel side, and then the operation panel and the circuit board are assembled and the switch unit and the operation unit are simultaneously connected. However, due to the mounting error between the operation panel and the circuit board, or the warpage of these, the lighting mechanism terminal on the operation unit and the board connection terminal on the switch unit are liable to have a poor connection. There was a problem in terms.

The present invention has been made in view of such circumstances, and has as its object to provide an illuminated push button switch that can be mounted on a board without the above-described conventional problems.

(Means for Solving the Problems) To achieve the above object, the present invention provides a circuit board (3) having a microswitch (6) and an illumination mechanism (7) as shown in FIG. A switch unit (1) to which the respective terminals (8, 9) of the microswitch (6) and the illumination mechanism (7) are connected and fixed, and a push button (16) and the illumination mechanism (7) are connected to the push button (16). An operation unit (2) mounted and fixed to an operation panel (4) having a hollow portion (18) to be introduced into the inside; a terminal (8, 9) in the switch unit (1) is mounted on a circuit board; When the circuit board (3) and the operation panel (4) are assembled with the operation unit (2) fixed to the operation panel (4) while being connected and fixed to (3), the operation unit is in an assembled state. (2) The switch (17) of the push button (16) is Structure corresponding to the operation unit (10) of the micro switch (6) of the switch unit (1), and the illumination mechanism (7) of the switch unit (1) is introduced into the cavity (18) of the operation unit (2). And

(Operation) According to the configuration of the present invention, the switch unit is mounted and fixed on the circuit board, and the circuit board and the operation panel are assembled in a state where the operation unit is mounted and fixed on the operation panel. The body is arranged corresponding to the operation unit of the microswitch of the switch unit, and the illumination mechanism of the switch unit is introduced into the cavity of the operation unit.

In this case, the illuminating mechanism is connected in advance to the illuminating circuit on the circuit board, and no electrical connection is made when the circuit board and the operation panel are assembled.

Also, even if the operation unit and the switch unit are slightly displaced due to an assembly error between the operation panel and the circuit board, a warpage of the circuit board, etc., the displacement between the push button and the operation unit of the microswitch is abuttingly pressed. There is no problem in operation, and practical problems do not occur at all even if the illumination mechanism is slightly displaced in the cavity.

(Example) FIG. 1 shows a vertical cross section of an illuminated push button switch according to the present invention in an assembled state.

This illuminated push button switch includes a switch unit 1 and an operation unit 2. The switch unit 1 is mounted and fixed on a circuit board 3, and the operation unit 2 is mounted through the operation panel 4. As shown in FIGS. 2 to 4, the switch unit 1 is configured by engaging and supporting a micro switch 6 in a case 5 and assembling an illuminating mechanism 7. A switch terminal 8 and an illuminating terminal 8 are provided. The terminal 9 projects downward.

The microswitch 6 is provided with a mounting claw 6a on the side surface and an operation piece 6b protruding on the upper surface.
An operation arm 10 pivotally supported by the case 5 via a support shaft 10a so as to be vertically swingable and urged upward by a compression coil spring 11 is provided opposite the operation piece 6b. Switching is performed by operation.

The illuminating mechanism 7 is configured by attaching an LED 12 constituting a light emitting portion to an upper end of a stay 5a erected at the center of the case 5, and a pair of lead terminals 13 of the LED 12 is led into the case 5 along the stay 5a. The contact 14 is elastically brought into contact with the contact 14 inserted and fixed in the case 5, and the outwardly extending portion of the contact 14 serves as the illumination terminal 9.

On the other hand, the operation unit 2 includes a rectangular hollow push button 16 capable of transmitting light, which is vertically movably fitted to an upper portion 15a of a case 15 having an upper portion 15a formed in a box shape and a lower portion 15b formed in a cylindrical shape. A switch operation body 17 provided in the switch button 15b is connected to the lower end of the push button 16, and the illumination mechanism 7 is inserted into the center of the push button 16 and the switch operation body 17 with a sufficient margin. The body 18 is formed.

The illuminated push button switch of the present invention is configured as described above. In actuality, the terminals 8 and 9 of the switch unit 1 are inserted into the mounting holes of the circuit board 3 and soldered to the circuit pattern. Then, the lower cylindrical portion 15b of the operating unit case 15 was inserted into the mounting hole of the operating panel 4 from above, the nut 19 was mounted on the lower cylindrical portion 15b, and the operating unit 2 was fixed. In this state, the circuit board 3 and the operation panel are assembled. At this time, the illuminating hole mechanism 7 protruding from the center of the switch unit 1 is inserted into the cavity 18 formed at the center of the operation unit 2, and the LED 1
Press 2 and insert it into button 16.

At this time, even if the switch unit 1 and the operation unit 2 are assembled with a slight displacement, the switch operation is not hindered even if the switch operation body 17 is slightly displaced with respect to the contact protrusion 10b of the operation arm 10. Further, even if the illumination mechanism 7 is slightly displaced in the cavity 18, the illumination performance is not affected at all.

In the embodiment, the light emitting section of the illumination mechanism 7 is constituted by the LED, but it is needless to say that the light emitting section may be constituted by a lamp.

(Effects of the Invention) As described above, the illuminated push button switch of the present invention is not affected by assembly errors between the operation panel and the circuit board, warpage of the board, and the like, and is capable of operating performance and reliability. This makes it possible to mount the circuit board without impairing it, thereby solving the problem of a conventional connection failure between the illumination mechanism terminal and the board connection terminal.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS The drawings show an embodiment of the present invention, FIG. 1 is a vertical sectional front view of an assembled state, FIG. 2 is a partially cutaway front view of a single switch unit, and FIG. 3 is a sectional view taken along line AA in FIG. Figure,
FIG. 4 is a sectional view taken along line BB in FIG. DESCRIPTION OF SYMBOLS 1 ... Switch unit, 2 ... Operation unit, 3 ... Circuit board, 4 ... Operation panel, 6 ... Micro switch, 7 ... Lighting mechanism, 12 ... LED (light emitting part), 16 ... Push button , 18 ... The cavity.

Claims (1)

(57) [Claims] 1. A microswitch (6) and an illumination mechanism (7).
A switch unit (1) having a micro switch (6) and an illumination mechanism (7) connected and fixed to a circuit board (3) on a circuit board (3), and a push button (16); Push the button (1
6) an operation unit (2) having a hollow portion (18) to be introduced into the inside and being fixed to the operation panel (4); and terminals (8, 9) in the switch unit (1). When assembling the circuit board (3) and the operation panel (4) in a state where the circuit board (3) is connected and fixed to the circuit board (3) and the operation unit (2) is fixed to the operation panel (4), The switch operation body (17) of the push button (16) of the operation unit (2) corresponds to the operation section (10) of the micro switch (6) of the switch unit (1), and the illumination mechanism of the switch unit (1). (7) An illuminated push button switch having a structure in which (7) is introduced into a hollow portion (18) of an operation unit (2).