JPH0447931B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an illuminated push button switch used for controlling power supply to various electronic devices such as audio devices.

(b) Prior Art Conventionally, the above-mentioned illuminated pushbutton switch has been disclosed in, for example, Japanese Utility Model Application Publication No. 54-67272 and Japanese Utility Model Application Publication No. 58-58.
There are switches described in Japanese Utility Model Publication No. 53429 and Japanese Utility Model Application Publication No. 54-128073.

In other words, the switch of the switch mechanism can be activated by pressing down the Shoko unit, which has a shape corresponding to the rectangular prism or rectangular cylindrical housing.
Since it is a switch that turns on and off, there was a problem in that the Shoko push button switch itself became large.
In particular, the Shoko push button switch described in Japanese Utility Model Application Publication No. 58-53429 has a configuration in which the lamp and lamp holder move up and down, so vibrations are applied to the lamp.
This not only shortens the life of the lamp, but also increases the pressure required to operate the switch.

(c) Purpose of the Invention The present invention is capable of reducing the size of the switch itself, prolonging the life of the lamp, and reducing the pressing force required for operating the switch. The object of the present invention is to provide a Shoko push button switch that can prevent a lamp case from tilting.

(d) Structure of the Invention This invention enables a switch mechanism to be turned on and off via a plunger unit by pressing down a Shoko unit built into a housing.
The housing has a square cylindrical head and a cylindrical body following the head, and the lamp case of the illumination unit has an outer wall that is connected to the head of the housing. a rectangular head along an inner wall; a cylindrical body portion that is in contact with an outer wall and an inner wall of the body portion of the housing; the inner wall is in contact with a cylindrical lamp holder; and the body portion moves up and down in contact with the housing and the lamp holder; an engaging protrusion protruding inwardly from an inner wall at a lower end of the body of the lamp case and located at a lower portion of the lamp holder; and a head of a plunger on an outer wall of the body of the lamp case facing the engaging protrusion. The light-emitting push button switch is characterized in that the switch mechanism is disposed inside the body of the housing, and the switch mechanism is provided inside the body of the housing.

(E) Effects of the Invention According to the present invention, a housing having a square cylindrical head and a cylindrical body continuing from the head is provided, and a switch mechanism is installed inside the body, which is different from the conventional one. This has the effect that the switch itself can be significantly miniaturized compared to other switches.

In addition, since the lamp case corresponding to the shape of the housing described above has a structure that slides into contact with the lamp holder, the lamp attached to the lamp holder and the lamp holder do not move up and down, and as a result,
This has the effect of extending the life of the lamp and reducing the pressing force required for switch operation.

Moreover, since the above-mentioned lamp case moves up and down with both the rectangular head and the cylindrical body positioned in two stages relative to the correspondingly shaped housing, it is possible to prevent the lamp case from tilting. There is an effect that can be achieved.

(F) Embodiment An embodiment of the present invention will be described in detail below based on the drawings.

The drawing shows an illuminated pushbutton switch, with the first
In the figures and FIG. 2, 1 is a housing made of synthetic resin, and this housing 1 has a square cylindrical head 3,
The head 3 and a cylindrical body portion 2 following the head 3 are integrally formed.

4 is a lamp case made of synthetic resin, and this lamp case 4 has a rectangular head 4a whose outer wall is along the inner wall of the head 3 of the housing 1 described above, and whose outer wall is in contact with the inner wall of the body 2 of the housing 1 described above. , a cylindrical body portion 4b whose inner wall is in contact with the cylindrical lamp holder 5 and which moves up and down in contact with the above-mentioned housing 1 and the above-mentioned lamp holder 5. An LED 6 held in a lamp holder 5 is attached to the lower part of the lamp case 4, and a cover 8 is fitted to the upper part with a light diffusing plate 7 interposed therebetween.

The illumination unit 9, which integrates the aforementioned elements 4 to 8, is slidably attached to the upper end opening of the housing 1.

On the other hand, a first base 11 with integrated terminals 10 and a second base 12 with integrated terminals 13 are attached in the body portion 2 of the housing 1 described above.

A partition wall 14 is provided on one first base 11 and is located approximately in the center of the cylindrical portion 2 and partitions a switch mechanism 26, which will be described later.
A through hole 15 is formed for guiding the operation piece 24 to the plunger 21 side, which will be described later, and a bar-shaped locking part 16 for locking the operation piece 24 described above is made of synthetic resin following the through hole 15. It is integrally formed.

The aforementioned partition wall 14 separates the interior of the body portion 2 of the housing 1 into the plunger chamber 17 and the switch mechanism chamber 1.
One plunger chamber 17 is provided with a plunger 21 with an alternate cam 20 pivotally attached to a protruding shaft 19, and the other switch mechanism chamber 18 is provided with a contact 22 at the free end. Movable piece 23 and approximately W
A switch mechanism 26 consisting of a letter-shaped operating piece 24 and a tension spring 25 is provided.

One end 24a of the aforementioned approximately W-shaped operating piece 24 is locked to the inverted L-shaped terminal 13, and its middle portion is led out into the plunger chamber 17 through the aforementioned through hole 15, and this leading end is used for operation. The other end 24b of the piece 24
A coil spring 27 is stretched between the spring seat 21a and the above-mentioned spring seat 21a on the upper part of the plunger 21.

Furthermore, the above-mentioned locking angle 2 of the upper end of the plunger 21 is
The recessed portion 28a of the lamp case 4 is engaged with the shaft-shaped projection 29 at the lower part of the lamp case 4, so that the plunger 21 is interlocked with the above-described pressing operation of the illumination unit 9.

A claw-like engagement protrusion 30 is provided on the inner side of the lamp case 4 opposite to the shaft-like protrusion 29, and the engagement protrusion 30 is located at the lower part of the lamp holder 5.

That is, the body portion 4b of the lamp case 4 described above
The above-mentioned engaging protrusion 30 extends inward from the lower end inner wall of the
The structure is such that the engaging protrusion 30 protrudes and is located at the lower part of the lamp holder 5, and the engaging protrusion 30 on the body portion 4b of the lamp case 4 described above
A recess 4 is formed on the outer wall of the opposing surface of the plunger 2 and is open downward, leaving a protrusion 29 that engages with the locking angle 28 of the plunger 21 described above.

In addition, 32 and 33 in the figure are terminals for LED, and 34
is a mounting screw that is screwed into the threaded portion on the outer periphery of the body portion 2 as described above.

The illustrated embodiment is configured as described above,
The action will be explained below.

Now, when the illumination unit 9 is pushed down, the engagement between the shaft-shaped projection 29 and the locking angle 28 causes the plunger 21 to move downward, and the downward force of this plunger 21 is transmitted via the coil spring 27 to the operating piece. 2
4, the operation piece 24 has one end 2
4a as a fulcrum and swings counterclockwise in Fig. 1,
At the same time, the alternate cam 20 rotates half a rotation to keep the plunger 21 from moving downward.

As a result, the movable piece 23 held by the tension spring 25 is tilted, and the contact 22 at its lower end comes into pressure contact with the opposing terminal 10, so the switch is turned from off to on, and the LED 6 emits light.
This state is maintained by the alternate cam 20.

Under these conditions, when the illumination unit 9 is pressed down again, the switch is turned from on to off, resulting in the state shown in FIG. 1.

By the way, the housing 1 has a square cylindrical head 3 and a cylindrical body 2 that continues to the head 3.
Since the switch mechanism 26 is provided inside the body section 2, the switch itself can be significantly downsized compared to conventional switches.

Further, since the lamp case 4 corresponding to the shape of the housing 1 described above has a structure that slides into contact with the lamp holder 5, the lamp 6 attached to the lamp holder 5
(LED in this embodiment) and the lamp holder 5 do not move up and down, which has the effect of extending the life of the lamp 6 and reducing the pressing force required for switch operation.

Moreover, since the lamp case 4 described above moves up and down with both the rectangular head 4a and the cylindrical body 4b positioned in two stages relative to the correspondingly shaped housing 1, the lamp case 4 is tilted. It has the effect of reliably preventing this.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, with FIG. 1 being a sectional view of an illuminated push button switch, and FIG. 2 being an exploded perspective view of the illuminated push button switch. DESCRIPTION OF SYMBOLS 1...Housing, 2...Body part, 3...Head, 4...Lamp case, 4a...Head, 4b...
... body part, 4c ... recess, 5 ... lamp holder,
9...Lighting unit, 21...Plunger, 26
...Switch mechanism, 29...Protrusion, 30...Engagement protrusion.

Claims (1)

[Claims] 1. An illuminated push button switch that turns on and off a switch mechanism 26 via a plunger unit by pressing down an illumination unit 9 housed in a housing 1, the housing 1 having a square shape. The lamp case 4 of the lighting unit 9 has a cylindrical head 3 and a cylindrical body 2 following the head 3, and has a rectangular outer wall along the inner wall of the head 3 of the housing 1. The head 4a has an outer wall in contact with the inner wall of the body portion 2 of the housing 1, and an inner wall in contact with the cylindrical lamp holder 5, so that the housing 1 and the lamp holder 5
a cylindrical body part 4b that moves up and down in contact with the lamp case 4; an engaging protrusion 30 that protrudes inward from the inner wall of the lower end of the body part 4b of the lamp case 4 and is located at the lower part of the lamp holder 5; The switch mechanism 26 is provided with a recess 4c that opens downward, leaving a protrusion 29 that engages with the head of the plunger 21 on the outer wall of the body portion 4b of the housing 4 facing the engagement protrusion 30. Illuminated push button switch installed inside the body part 2.