JPS61138422A - 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 equipment such as audio equipment, and more specifically, the present invention relates to a push button switch that is used in various electrical equipment such as audio equipment. This invention relates to a push button switch whose switch cover can be reinforced.

(B) Background of the Invention In general, this type of push button switch has a switch unit configured by mounting a switch mechanism on a switch base and a gate-shaped switch cover that covers the switch mechanism. It is built into the housing along with the controller and operation unit.

By the way, the switch mechanism is mounted on the switch base to allow the movement of switch parts such as coil springs and movable pieces, so that it can be operated ON-OFF by moving when the switch is pressed down. Among these, the coil spring is Since a constant tension is applied, the position cannot be controlled until it is assembled into the housing, making it difficult to handle the switch parts and making it impossible to temporarily assemble them. In addition, this coil spring is easily dislodged due to external vibrations, etc., and since there is no rocking control for the coil spring, especially when it is assembled into a housing,
II11, which requires a lot of effort in the assembly work, such as requiring reassembly and skill.

Furthermore, in order to reduce the size of the switch, the switch cover is formed into a gate shape with only the portion corresponding to the lower switch mechanism cut out, but this gate shape reduces the strength of the switch cover itself. The problem was that it deteriorated and was easily damaged.

(c) Purpose of the Invention Therefore, the present invention provides a push button switch in which the coil spring does not come off unexpectedly when assembling the switch, and the strength of the gate-shaped switch cover does not decrease even when the switch is made smaller. For the purpose of providing.

(d) Summary of the Invention The present invention is characterized in that it is a push button switch in which a regulating piece that also serves as a reinforcing member for regulating the swinging of a coil spring is provided between the legs of a gate-shaped switch cover.

(E) Effects of the Invention According to this invention, the regulating piece vertically disposed on the switch cover contacts the coil spring mounted on the switch base to regulate the swinging of the coil spring. Even if the switch base and the switch cover are integrally assembled as a switch unit, the coil spring is stably supported, resulting in a temporary assembly that accurately prevents the switch components from coming off.

For this reason, each temporarily assembled switch unit can be assembled as a single unit, making it easier to handle and manage the switch parts, and prevent switch parts such as coil springs and associated movable pieces from coming apart, and requiring less skill. It can be efficiently incorporated into the housing.

Furthermore, since the regulating piece is used as a reinforcing member and is stepped between the gate-shaped legs of the switch cover that are prone to breakage, even if the switch cover is gate-shaped, it cannot maintain the specified strength required for the switch mechanism. As a result, the switch becomes a robust switch, and the assembly efficiency and reliability of the switch can be reliably improved.

(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 that corresponds to the open lower surface of the collar cap 6, and a locking convex portion 10 protruding from a part of the outer circumferential side surface locks the collar cap 6. It is fitted integrally into the recess 11 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 that guides 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. The cylindrical holder 14 has a cylindrical holder 14 for holding the cylindrical holder 13, and the cylindrical holder 14 is provided with hanging pieces 16 on both sides thereof having elongated holes 15 which 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.
In addition to this, the pressing operation is allowed by the length of the pressing stroke. Furthermore, the reflective 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 the light emitting element 13 is pulled out from the upper open surface of the light emitting element 13, the gap between the upper protrusion 19 and the locking claw 21 is removed and the light emitting element 13 is removed to the outside. Therefore, 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 installed inside the housing 5.

The operating unit 3 is composed of an operating plunger 25 and a spring 26 that biases the operating plunger upward. The operating plunger 25 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.

Roughly speaking, the large diameter part has a long hole 31 which is opened 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. Therefore, 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 which is inverted in shape and has a relatively large opening. A mechanism 38 is formed, and this alternate structure 3
8 regulates the push-down lock position and 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, and has locking claws 21 on both upper surfaces thereof. The upper protrusion 19 of the light emitting element is protruded and locked with a certain holding force to prevent it from coming off. Spring locking grooves 2 are provided on both outer sides of both locking claws 21.
6b, and the lower ends of the springs 26 described above are respectively supported and guided and locked in these spring locking grooves 26b.

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 338 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 the switch cover 33, hanging pieces 54a are provided as gate-shaped connecting legs, and between these hanging pieces 5A and 5a, a coil spring of a switch mechanism, which will be described later, is in contact. A regulating piece 54b, which also serves as a reinforcing member, is provided vertically to regulate the swinging of the coil spring. The regulating pieces 54a reinforce the hanging pieces 54a on both sides and increase the strength efficiently. A lower engaging protrusion is provided on the inner surface of the lower end of these hanging pieces 54a to be integrally connected to a switch base to be described later for temporary assembly.

The above-mentioned switch base 44 is divided into two half-moon-shaped divided switch bases 44. a, 44b are used in a disk shape by combining them together, and when manufacturing these split switch bases 44a, 44b, the one-circuit switch mechanism described later is Each terminal is integrally insert-molded to ensure efficient assembly to the switch base 471.

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.

These divided switch bases 4.4a and 14b have a pair of engagement protrusions 46 and engagement recesses 47 on their mutually facing connection surfaces so as to be engaged with each other. The periphery has a band-shaped protrusion 46a along the protrusion direction, and by ultrasonic welding with the engagement protrusion 46 in the opposing engagement recess 47, the protrusion 46a is attached to the engagement recess 47. Welded to the inner surface, both split switch bases 4
4a and 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 engagement recesses 55, respectively. By integrating the switch base 44 and the switch cover 33, the switch base 44 and the switch cover 33 are easily handled, and the operation for storing the switch in the housing 5 is also extremely simple.

A two-circuit cutting 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 mechanism 56 includes a first upper terminal 58 which has a contact member 57 facing upwardly and downwardly.
and a first lower terminal 59, and parallel to these terminals are also upper and lower terminals.
A second upper terminal 60 and a second lower terminal 61, which are arranged opposite to each other at the bottom, are insert-molded and planted on the switch base 44, and there is a common horizontal line between the upper and lower opposing surfaces. A first movable piece 62 with a wide width is provided, and this first movable piece 62 contacts the contact member 5 of each upper and lower terminal.
A contact member 63 that contacts the switch base 44 is arranged in parallel with the contact member 63 that contacts the switch base 44 .
While being locked in the notch 65 of the planting piece 64 planted above, the engagement protrusion 66 at the other end is engaged with the engagement hole 68 formed at one end of the second movable piece 67. , the other end of the second movable piece 67 is locked with the lower end of the above-mentioned operation piece 35, and the other end of the second movable piece 67 has an upright piece 69 that is partially bent and stands up. The upright piece 69 is engaged with a vertical groove 70 formed at the lower end of the operating piece 35 to restrict its upward movement.

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 furthermore, the swinging of the coil spring 71 is restricted to the middle part. The lower ends of the above-mentioned regulating pieces 54b are brought into contact with each other to regulate the position of the movable pieces 62, 67 via the coil spring 71, and the movable pieces 62, 67 are set to be temporarily phased based on this position regulation.

By applying the tensile action of the coil spring 71, the first movable piece 62 uses the groove 62a side as a fulcrum and urges the other side downward, and the second movable piece 67 uses the lower end of the operating piece 35 as a fulcrum. The other side is urged downward in the inclined state, and normally the first
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, which is in a tilted state, is moved downward, 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 the rotating pieces 62 and 67 moves upward, and the O
Switched to N operation.

Note that when the operating plunger 25 is pressed down and locked by the above-mentioned alternate machine 11138, the switch mechanism 56 is in the O position.
When the switch mechanism 56 is set to the N state and the operation 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
What is 1. It is inserted and attached from the lower opening of the housing 5. In the figure, reference numeral 72 denotes a wall mounting nut that is screwed onto the outer peripheral surface of the housing.

In the illuminated push button switch configured as described above, when the surface of the color cap 6 of the illumination unit 2 is pressed down with a finger, the operation piece 35 of the operation plunger 25 moves downward together with the reflective plunger 9 in response to this press. Then, the second movable piece 67 is pushed down, and in conjunction with this, the first movable piece 6
2, 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. Further, the press input signal is input to a predetermined electrical device set in advance.

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 mechanism 38 each return to their original positions and are switched to the OFF state. .

[Brief explanation of drawings]

The drawings show an embodiment of the present invention, in which FIG. 1 is an exploded perspective view of an illuminated pushbutton switch, FIG. 2 is a longitudinal side view of the illuminated pushbutton switch, and FIG. 3 is a longitudinal sectional front view of the illuminated pushbutton switch. 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 54a... Vertical piece 54b
...Regulation piece 56...Switch mechanism 71...
・Coil spring

Claims (1)

[Scope of Claims] 1. A push button switch comprising a switch unit configured by mounting a switch mechanism on a switch base and a gate-shaped switch cover that covers the switch mechanism, the switch unit comprising: A push button switch characterized in that a regulating piece that also serves as a reinforcing member for regulating the swinging of the coil spring is provided vertically between the legs of the shaped switch cover in contact with the coil spring of the switch mechanism.