JPH0143775Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a push button switch with an indicator lamp by providing a chipped light emitting diode corresponding to each of a plurality of push button switches.

The pushbutton switch has a dome-shaped protrusion 3-1 that elastically deforms in the direction of depression when the pushbutton 2 attached to the housing 1 is depressed, as shown in the cross-sectional view of the main part in Fig. 1. It consists of a movable contact member 3 made of a rubber sheet with a conductive rubber contact 4 adhered to its inner upper end surface, and a substrate 5 on which a contact pattern 5-1 as a fixed contact is printed at a position facing the contact 4. When the push button is pressed down, the conductive rubber contacts 4 short-circuit a between the contact patterns, and when the push button 2 is released, the elasticity of the rubber opens the contacts a.

Conventionally, the structure for attaching an indicator lamp to this type of pushbutton switch is as shown in the cross-sectional view of the main part of FIG. A mounting pattern 6-2 is provided on the back surface of the printed circuit board, the lead wire of the light emitting diode 7 is soldered to the mounting pattern 6-2, and the light emitting diode 7 is mounted in the cavity 9 of the push button 8. A diode 7 is arranged, and the lamp display window 8-1 is illuminated by lighting the light emitting diode.

However, with the recent miniaturization of electronic components, devices incorporating these types of electronic components are becoming smaller and thinner.
Thinness has not been possible due to limitations on the size and mounting height of the light emitting diode. Further, the printed circuit board must have a contact pattern as a fixed contact on the front surface and a pattern for attaching and fixing the light emitting diode on the rear surface, and thus requires a printed circuit board with double-sided patterns.

The present invention was devised in order to eliminate such drawbacks, and is used for mounting chipped light emitting diodes (hereinafter simply referred to as chips) on contact patterns as fixed contacts of multiple pushbutton switches arranged on a printed circuit board. The patterns are placed close to each other, and a chip is attached to the chip mounting pattern, and the illumination from one protrusion adjacent to the protrusion covering each chip is located at a position facing the chip, and the illumination from one protrusion leaks to the other non-illuminated protrusion. In order to prevent the appearance of illumination, a slit with a narrow downward slope is provided between adjacent protrusions, and a perforation through which a conductive rubber contact can pass is provided at a position facing the contact pattern. An integrally molded resin plate is attached to the printed circuit board, the movable contact member provided with a hole into which the protrusion of the resin plate is fitted is fitted onto the resin plate, and a push button is placed on the protrusion of the movable contact member. It is an object of the present invention to provide a push button switch with an indicator lamp, which is characterized in that it is mounted on a push button switch.

The present invention will be explained below with reference to the drawings.

FIG. 3 is a sectional view showing the main parts of a push button switch with an indicator lamp showing an embodiment of the present invention, and the same reference numerals as in FIGS. 1 and 2 indicate the same parts. 11
10 is a chip attached to the pattern 6-3 of the printed circuit board 6, and 10 is a transparent resin plate attached to the chip 11.
The protrusion 10-1 is integrally formed with a transparent resin plate provided to cover the chip, protect the chip, and enhance the scattering effect.

FIG. 4 is an exploded perspective view showing an embodiment of the present invention in which a plurality of push button switches with indicator lamps are arranged, and the same reference numerals as in FIG. 3 indicate the same parts. 6-4
10-4 is the insertion hole of the adhesive protrusion 10-3 of the transparent resin plate 10, and 10-4 is the dome-shaped protrusion 3 of the movable contact member 3.
-1 is a hole provided so that the conductive rubber contact 4 shown in FIG. 3 passes through when pressed down with the push button 8 shown in FIG. 10-5 is the adjacent protrusion 10.
A slit 12 provided between -1 is a connector for connecting a printed circuit board.

FIG. 5a shows a sectional view taken along the line AA in FIG. 4, and FIG. 5b shows an enlarged view of the slit 10-5. Slits 10-
5 has a narrow slope toward the bottom as shown in FIG. 5b.

Fig. 6 is a perspective view of a pushbutton telephone equipped with a pushbutton switch with an indicator lamp according to the present invention, where 1 is the housing of the telephone, and 8 is an indicator lamp of the pushbutton switch which has various functions such as receiving outside calls and internal calls. The pushbutton provided with the window 8-1, 14, is a pushbutton with a pushbutton dial, which indicates that the pushbutton switch with indicator lamp of the present invention is related to the pushbutton 8.

Next, the configuration of the present invention will be explained with reference to FIGS. 3 to 6.

The printed circuit board 6 has a contact pattern 6-1 with a pattern interval a as a fixed contact of the switch, and a chip mounting pattern 6-1 arranged in parallel with the contact pattern 6-1.
A plurality of chips 3 are arranged in pairs, and a chip 11 is attached to the chip attachment pattern 6-3.

The printed circuit board 6 configured in this manner has a perforation 10-4 corresponding to each of the plurality of contact patterns 6-1, a protrusion 10-1 corresponding to each of the plurality of chips 11, and an adjacent protrusion 10-1. Projection 10-
A fixing protrusion 10-4 corresponding to each of the slits 10-54 fitting holes 6-4 provided between the
3 on which the transparent resin plate 10 is attached to the printed circuit board 6
and a perforation 3-2 corresponding to each of the plurality of protrusions 10-1 provided on the transparent resin plate 10.
and a dome-shaped protrusion 3-1 that elastically deforms corresponding to each of the plurality of contact patterns 6-1.
and has. A movable contact member 3 made of a rubber sheet with a conductive rubber contact 4 attached to the inner upper end surface of the projection 3-1 is fitted onto the transparent resin plate 10, the housing 1 is covered, and the push button 8 is pressed. By installing the protrusion 10-1 of the transparent resin plate 10 in the cavity 9 of the pushbutton, a pair of chipped light emitting diodes are provided as indicator lamps corresponding to each of the plurality of pushbutton switches. This constitutes a push button switch with an indicator lamp.

The present invention has been described above with respect to an embodiment in which an indicator lamp is provided inside the cavity of the push button, but an indicator lamp may be provided in parallel with the push button in correspondence with the push button switch as shown in Fig. 7. That is clear. In the figure, 13 indicates a lamp cover.

As described above, according to the present invention, a plurality of chipped light emitting diodes are bonded to the pattern of a printed circuit board, and a resin plate with protrusions at positions facing the chips and slits between adjacent protrusions is bonded. Because it is attached to a printed circuit board, the height of the pushbutton switch with indicator lamp can be made extremely low, and because the slit is provided, when only one of the adjacent indicator lamps is lit, its illumination can be reduced. Due to the prism effect, the display lamp faces downward, and the light leaks into the other display lamp window that is not lit, so that it does not appear as if it is illuminating. Since the multiple protrusions are integrally molded on the resin plate, positioning is easy when fitting the movable contact member, and the chipped light emitting diode has a chip mounting pattern provided on the same surface as the contact pattern surface of the printed circuit board. Since it can be mounted on a single-sided printed circuit board, it can be manufactured at low cost, and has various advantages.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main parts of a conventional pushbutton switch, Fig. 2 is a sectional view of the main parts of a conventional pushbutton switch with an indicator lamp, and Fig. 3 is a sectional view of the main part of a conventional pushbutton switch with an indicator lamp. FIG. 4 is an exploded perspective view showing an embodiment of the present invention in which a plurality of pushbutton switches with display lamps according to the present invention are disposed, and FIG. A- in Figure 4
A sectional view, FIG. 5b is an enlarged sectional view of the slit, FIG. 6 is a perspective view of the push button switch with indicator lamp of the present invention used in a button telephone, and FIG. 7 is a push button switch with an indicator lamp of the present invention. FIG. 7 is a sectional view of essential parts showing another embodiment of the push button switch. In the figure, 1... Housing, 2... Push button, 3
...Movable contact member, 3-1...Dome-shaped projection,
3-2... Perforation, 4... Conductive rubber contact, 5 and 6... Printed circuit board, 6-1... Contact pattern,
6-3... Chip mounting pattern, 7... Light emitting diode, 8... Push button with display lamp window, 9... Cavity, 10... Transparent resin plate, 10-
1... Protrusion, 10-4... Perforation, 10-5... Slit, 11... Chip-formed light emitting diode, 12
...Connector, 13...Light cover, 14...Push button dial push button.

Claims (1)

[Scope of utility model registration request] A movable contact member made of a rubber sheet with contacts attached to the inner upper end surfaces of a plurality of dome-shaped protrusions that elastically deform in the direction in which the push button is pressed, and a plurality of fixed contacts located at positions opposite to the contacts. A printed circuit board on which a chipped light emitting diode mounting pattern is printed adjacent to the contact pattern, and a chipped light emitting diode attached to the chipped light emitting diode mounting pattern is printed on the printed circuit board. A plurality of slits are provided between a plurality of protrusions covering the chipped light emitting diode and another protrusion provided adjacent to the protrusions, each of which becomes narrower toward the bottom. a resin plate integrally formed with perforations through which the respective contacts of the movable contact member can pass through at opposing positions; the resin plate is attached to the printed circuit board; the protrusions of the resin plate are fitted into the perforations; Fitting the movable contact member provided with on the resin plate,
A push button switch with an indicator lamp, characterized in that a push button is placed on a protrusion of the movable contact member.