JPS61135010A - Push button swtch - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION (A) Field of the Invention The present invention relates to a push button switch used in various electrical appliances such as audio equipment, and more specifically, a push button switch that enables temporary assembly of a switch unit. This invention relates to a push button switch that simplifies overall switch assembly.

(B) Background of the Invention In general, in this type of push button switch, a switch unit consisting of a switch base on which a switch mechanism is mounted and a switch cover that covers the switch mechanism is housed and held in a housing together with an operation unit, etc. ing.

By the way, the switch mechanism is designed to enable ON/OFF operation in conjunction with the push-down operation of the switch, to allow the movement of the switch parts, and to prevent the switch parts from separating from each other. It is assembled into the housing in an accurate correspondence with the

However, with this assembly method, the switch base and switch cover are not integrated, so small switch parts tend to come apart when assembled into the housing, and are difficult to handle, resulting in assembly defects. The assembly work requires a lot of effort, such as having to be reassembled and requiring a lot of skill, leading to high costs.

Additionally, each switch component is cleaned to ensure the performance of the switch, but when it is assembled, thousands of dirt and dust may get on it, which may reduce the reliability of the contact parts of the switch mechanism or impair its aesthetic appearance. There was a loss.

(c) Purpose of the Invention Therefore, an object of the present invention is to provide a push button switch that can be easily assembled into a housing and improve the reliability of the switch mechanism by integrally unitizing the switch member. do.

(d) Summary of the Invention The present invention is characterized in that it is a push button switch in which the switch base and the switch cover can be temporarily assembled, thereby simplifying the overall assembly of the switch portion and the entire switch.

(e) Effects of the Invention According to the present invention, the switch base on which the switch i structure is mounted in a set state that can be turned on and off and its switch cover can be provisionally provided as an integral switch unit. Because of this, each switch unit can be handled as a single unit without touching the small switch parts, making it easier to handle and manage the switch parts. Can be incorporated.

Furthermore, since each switch unit can be cleaned at once, the switch parts are free from dirt from hands and the like, resulting in a high-quality switch that can reliably improve the reliability and aesthetics of the switch mechanism.

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

The drawings show an illuminated pushbutton switch, and in FIGS. 1 to 3, the illuminated pushbutton switch 1 is roughly divided into an illumination unit 2, an operation unit 3, a switch unit 4, and a housing that houses and holds these units. It consists of 5.

The above-mentioned illumination unit 2 is provided as an illumination body that also serves as a push button part, and is housed in a box-shaped color cap 6 that is colored in any color such as red, yellow, or green and has an open bottom surface.
A diffusion plate (reflection plate) 8 is provided inside and fitted onto the upper surface of the reflection plunger 9 corresponding to the lower side. The reflective plunger 9 has a rectangular open upper surface corresponding to the open lower surface of the color cap 6, and a projecting part q is provided on a part of the outer peripheral side surface of the reflective plunger 9.
The locking protrusion 10 is integrally fitted into the locking recess 11 of the collar cap 6 in a locking manner.

The circumferential surface is converged downward from this upper surface into a pyramidal shape, and has a trumpet-shaped reflective surface 12 for directing light upward, and a light emitting element such as a lamp or a light emitting diode is placed in the center of the lower part. 13, and this cylindrical holding part 14 is provided with hanging pieces 16 on both sides thereof having elongated holes 15 that are opened for the length of the depressing stroke along the depressing direction. Upper protrusions 17 protruding from both sides of the light emitting element 13 are respectively engaged with the upper protrusions 15 . As a result, the light emitting element 13 is mounted with the upper light emitting portion facing the upper surface of the reflective plunger 9 and the lower light emitting element external terminal 18 being exposed below the reflective plunger 9.

Further, upper protrusions 19 protruding from both side surfaces of the light emitting element 13 are engaged with locking claws 21 of a light emitting element holder 20, which will be described later, so that the light emitting element 13 is fixed.

Due to this fixing action, the reflective plunger 9 is attached to the light emitting element 13.
Apart from this, there is also a push-down stroke length (a push-down operation is allowed. Roughly speaking, the reflex plunger 9 is connected to the housing 5
The reflection plunger 9 is detachably attached to the upper open surface 22 of the housing 5 and is guided in sliding contact with the inner surface of the housing 5 to obtain a stable pressing operation. When removed, the light emitting element 13 is also removed from the gap between the upper protrusion 19 and the locking claw 21 and taken out to the outside, so that the light emitting element 13 can be easily replaced.

The above-mentioned diffusion plate 8 uniformly disperses and reflects the light from the light emitting element 13, and has required letters or numbers printed on its surface.

Further, below the above-mentioned illumination unit 2, an operation unit 3, which will be described later, is housed inside the housing 5.

This operating unit 3 is composed of an operating plunger 25 and a spring 26 that biases it upward, and the operating plunger 1725 is formed into a stepped cylindrical body having a small diameter portion on the upper side and a large diameter portion on the lower side. The engaging claws 28 of the reflective plunger 9 are respectively locked in the openings 27 opened on both sides of the small diameter portion, so that both the plungers 9 and 25 are integrally connected.

The upper ends of the coiled springs 26 are respectively locked to a pair of left and right spring locking protrusions 26a vertically installed at the lower part of the large diameter, and the lower ends are connected to a light emitting element holder 20, which will be described later.
locked on top. Due to the biasing force of the spring 26, the operating plunger 25 is normally in the upward movement position, and the outer circumferential step portion 29 of the operating plunger 25 is pressed against the housing 5.
It is locked to the inner circumferential stepped portion 30 to prevent it from coming off.

Further, the large diameter portion has a long hole 31 that is open for the length of the pressing stroke along the pressing direction, and this long hole 31 and a locking protrusion 34 of a switch cover 33, which will be described later, engage with each other. The pressing stroke of the operating plunger 25 is restricted.

In addition, the large diameter part has a switch that turns on at the bottom end when it is pressed down.
- An operating piece 35 for turning off is provided vertically.

This operation piece 35 is equipped with an opening window 36 that is inverted and has a relatively large opening in a vertically long manner, and an alternate mechanism 38 is formed by this window 36 and a cam 37 that is freely guided and regulated by the window 36. This alternate mechanism 38 regulates the push-down lock position and the push-down lock release position of the operation plunger 25.

The above-mentioned switch unit 4 includes a light emitting element holder 20,
The light emitting element holder 20 is composed of a switch cover 33 and a switch base 44, and has an insertion hole 45 in the center of the upper surface into which the external terminal 18 of the light emitting element is inserted.
A locking pawl 21 is provided on the upper surface of each illumination member so as to prevent the upper projection 19 of the light emitting element from coming out with a certain holding force. Spring locking grooves 26b are formed in both outer portions of both locking claws 21, and the lower ends of the springs 26 described above are supported and guided and locked in these spring locking grooves 26b, respectively.

Furthermore, a pair of support protrusions 48 are provided on both sides of the holder 20 to protrude in the radial direction, and these support protrusions 48 are supported by a switch cover 33, which will be described later.

The above-mentioned switch cover 33 has support protrusions 48 of the above-mentioned holder 20 on support guide surfaces 49 formed on both sides of the upper part.
The light-emitting terminal 50 is held in a terminal locking groove 33a formed on the side of the switch cover 33, and a bent plate spring at the upper end of the light-emitting terminal 50 is held in place. A shaped upper end contact piece 51 is disposed in an insertion space 52 in the switch cover 33 into which the light emitting element external terminal 18 is inserted, and is configured to be able to make contact.

A locking protrusion 34 that engages with the elongated hole 31 of the operation plunger 25 is protrudingly provided on the outer circumferential surface, and a fixing protrusion that supports a cam 37 as an alternate mechanism 38 is provided on the opposite outer circumferential surface. 53 is installed protrudingly.

Further, on both sides of this switch cover 33, hanging pieces 54a for connection are provided, and these hanging pieces 54a
A lower engagement protrusion is provided on the inner surface of the lower end of the switch for temporary assembly by integrally connecting it to a switch base, which will be described later.

The above-mentioned switch base 44 is made by combining half-moon-shaped divided switch bases 44a and 44b into a disc-shaped toilet. In this case, each terminal of a single-circuit switch mechanism, which will be described later, is integrally insert-molded during resin molding using a mold, thereby achieving efficient assembly to the switch base 44.

Note that by manufacturing these bases 44a and 44b separately, manufacturing of the mold is facilitated, and based on this facilitation, insert molding of the terminal is made possible.

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4b has an engaging protrusion 46 and an engaging recess 4 on mutually connecting facing surfaces.
7 and is provided to fit into the concave and convex portions, and furthermore, a band-shaped convex portion 46 is provided around the engaging protrusion 46 along the protruding direction.
a, and the protrusion 46a is welded to the inner surface of the engagement recess 47 by ultrasonic welding with the engagement protrusion 46 in the opposing engagement recess 47, and both split switch bases 44a , 44b are integrated.

Engagement recesses 55 are formed on both sides of the switch base 44 integrated in this way, and the lower engagement protrusions 54 of the switch cover 33 described above are engaged with these four engagement parts 55, respectively. By integrating the switch base 44 and the switch cover 33, the switch base 44 and the switch cover 33 can be easily handled as a switch part, and the operation of storing the switch base 44 in the housing 5 is also extremely simple.

A two-circuit, double-break type switch mechanism 56 is mounted on the same plane as the upper surface of the switch base 44 described above.

As shown in FIG. 4, this switch 'a case 56 is
A first upper terminal 59 and a first lower terminal 59 are arranged facing each other in the upper and lower directions of the contact member 57, and a second upper terminal 60 and a second Lower terminal 6
1 is insert-molded and planted on the switch base 44, and a wide first movable piece 62 that commonly contacts in the horizontal direction is disposed between the upper and lower opposing surfaces.
This first movable piece 62 has contact members 63 arranged in parallel to contact the contact members 57 of the upper and lower terminals on both sides.
The movable piece 62 has the V groove part 62a at one end engaged with the notch part 65 of the planting piece 64 planted on the switch base 44, and the engagement protrusion 66 at the other end is moved into the second movable state. The second movable piece 67 is engaged with an engagement hole 68 formed at one end of the piece 67.
The other end is locked with the lower end of the operation piece 35 described above, and the other end of this second movable piece 67 is provided with an upright piece 69 that is partially bent and stands up. 69 is the operation piece 3
U1 for upward movement is engaged in a vertical groove 70 formed at the lower end of
be done. Further, one end of a coil spring 71 is locked to this upright piece 69, and the other end is locked to the upper part of the upright piece 64, and by applying a tensile action of the coil spring 71, the first movable piece 62 urges the other side downward using the V-groove portion 62a side as a fulcrum, and the second movable piece 67 urges the other side downward in an inclined state using the lower end of the operation piece 35 as a fulcrum.
The movable piece 62 is in the OFF state in contact with the first and second lower terminals 59,61.

Then, as the operation piece 35 is pressed down, the upper side of the second movable piece 67 that is in the inclined state is moved down, thereby causing the second movable piece 67 to move downward.
When the movable piece 67 exceeds the horizontal straight line state with the first movable piece 62, the connecting portion of both rotating pieces 62 and 67 moves upward, and the O
Switched to N operation.

In addition, when the operating plunger 25 is pressed down and locked by the above-mentioned alternate mechanism 38, the switch mechanism 56 is set to the ON state, and when the operating plunger 25 returns,
The switch mechanism 56 is set to the OFF state.

In addition, the above-mentioned operation unit 3 and switch unit 4
is inserted into and attached to the housing 5 from the lower opening. In the figure, reference numeral 72 indicates a tightening nut for wall mounting that is screwed onto the outer peripheral surface of the housing.

It is.

In the illuminated push button switch configured as described above, when the six surfaces of the color keys of the illumination unit 2 are pressed down with a finger, the operation piece 35 of the operation plunger 25 is moved downward along with the reflective plunger in response to the pressing blade. Then, the second movable piece 67 is pushed down, and in conjunction with this, the first movable piece 62 is pushed down.
The contact side moves upward due to the tensile force of the coil spring 71.

As a result, the first and second upper terminals 58 and 60 are electrically connected via the first movable piece 62 and turned on.

In response to such a press input signal, the light emitting element 13 emits light and is illuminated. In addition, the press input signal is set in advance to 1.
= Input to a predetermined electrical device.

Note that this ON state is locked by the alternate mechanism 38, and the ON state is maintained until this lock is released.

Then, by pressing down the illumination unit 2 again, the lock of the alternate mechanism 38 is released, and accordingly, the illumination unit 2 and the switch device 11138 respectively return to their original positions and are switched to the OFF state. .

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an exploded perspective view of an illuminated push button switch, FIG. 2 is a 1t11gi side view of the illuminated push button switch, and FIG.
The figure is a longitudinal sectional front view of the illuminated pushbutton switch, and FIG. 4 is a perspective view of essential parts of the switch mechanism. 1... Illuminated push button switch 4... Switch unit 33... Switch cover 44... Switch base 56... Switch mechanism

Claims (1)

[Claims] 1. A push-button switch configured to turn on and off a switch mechanism of a switch unit in conjunction with a push-down operation of the switch, the switch unit comprising a switch base on which the switch mechanism is mounted, and a switch base on which the switch mechanism is mounted. , and a switch cover that covers the switch mechanism are integrally engaged and fixed in a temporarily assembled manner.