JPH0615373Y2 - Push button switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Overview] An object of the present invention is to improve a push button switch in which a switch portion is housed in an upright state in a housing, and to reduce the number of components and to facilitate the manufacture of the components and the assembly of the push button switch. The dome-shaped disc-shaped spring made of metal is housed in the terminal plate,
A first lead terminal having a first contact and a second lead terminal having a second contact are planted in a terminal plate, and the first contact and the second contact are separated by elastic deformation of a disc spring. A switch part that is electrically connected, a slider equipped with a push button, and a switch part are housed almost upright, and a housing that guides the slider up and down is interlocked with the up and down motion of the slider through a coil spring. It consists of a lever that reverses the concavity and convexity of the spring, and an operating part that has a bottom cover for holding the switch part. It is formed integrally with the housing through a thin plate-shaped flexible part that is mounted on the housing.

[Industrial application field]

The present invention relates to a push button switch utilizing the reversal movement of a disc spring made of a metal having spring properties, and more particularly to an improvement of a push button switch in which a switch portion is housed in an upright state in a housing in parallel with a push button operation direction.

Push button switches that use the reversal movement of a disc spring made of spring metal to switch between contacts have a relatively high contact pressure and are reliable in operation. There is.

There are two types of push button switches, one in which a thin switch portion is horizontally supported and the other in an upright state with respect to push buttons that operate in the vertical direction. The latter has a smaller configuration than the former.

[Conventional technology]

FIG. 3 is a side sectional view showing a main structure of a conventional push button switch, and FIG. 4 is a side view (a) and a plan view (b) showing a connection state of a switch portion and a lever shown in FIG.

In FIG. 3, a push button switch 1 is composed of a switch portion 2 and an operating portion 3, and the switch portion 2 housed in a housing 14 of the operating portion 3 has a pair of lead terminals 5 on a terminal plate 4 molded of plastic. The recesses 7 of the terminal plate 4 in which the disc springs 8 made of metal having spring properties are housed are covered with the insulating sheet 9.

The lead terminal 5 has a first contact 10 exposed on the peripheral surface of the recess 7, and the lead terminal 6 has a second contact 11 exposed on the center of the recess 7.

The operation unit 3 includes a slider 13 into which a push button 12 is fitted, a housing 14 that accommodates the switch unit 2 and guides the vertical movement of the slider 13, and a lever that swings in conjunction with the vertical movement of the slider 13 via a coil spring 15. 16 and housing 14
Is provided with a bottom lid 17 for engaging with and holding the switch portion 2.

Push button 12, slider 13, housing 14, lever 16
The bottom lid 17 is a plastic molded body, and the slider 13 has an elastic locking piece 18 that prevents the slider 13 from being pulled out above the housing 14, and a hanging piece 19 that slides on the inner surface of the guide hole of the housing 14. It comprises a protrusion 20 with which the upper end of the coil spring 15 fits.

This hanging piece 19 is formed of two rectangular shapes extending downward from the bottom surface of the head of the slider into the housing. In the figure, only the back side of the elastic locking piece is shown, and the front side is omitted.

In FIG. 4, a terminal plate 4 as shown in FIG. 3 of a switch unit 2 in which the lead portions of a pair of lead terminals 5 and 6 project from the lower surface has a protrusion (shaft) 21 protruding from the side surface and a pair of protrusions 21. The lever 16 is swingably supported.

The lever 16 has a pair of projecting pieces 22 each having a through hole that slides into the projection 21, a protrusion 23 for pressing the disc-shaped spring 8 through the sheet 9 and reversing the irregularities of the disc-shaped spring 8, It has a projection 24 with which the lower end of the coil spring 15 fits.

In the push button switch 1 configured as described above, the push button 12
When is pressed, the hanging piece 19 slides on the inner surface of the housing 14 and descends, and the lower end surface abuts on the upper surface of the bottom lid 17 and stops, while the lever 16 pressed down via the coil spring 15 , Is rotated in the direction of arrow A in FIG.
The concavities and convexities of the disc spring 8 pressed by the sheet 3 via the sheet 9 are reversed. Then, the disc spring 8 contacts both the contacts 10 and 11, and the lead terminals 5 and 6 are electrically connected.

Next, when the pushing force of the push button 12 is removed, the lever 16 returns to its original shape by the restoring force of the disc spring 8, and the push button 12 ascends and returns by the restoring force of the coil spring 15.

[Problems to be solved by the invention]

Generally, a keyboard used for input / output means of various terminal devices is constructed by arranging several tens to 100 or more push button switches in parallel, so that it is very easy to manufacture the push button switches. It will bring about an effect.
However, since the bottom lid 17 of the conventional push button switch 1 is a separate component, it is troublesome to transport and insert the bottom lids 17 one by one when assembling the push button switch 1.

[Means for solving problems]

According to the present invention, the above-mentioned problem is that the switch part (2) is housed upright on the inner surface of the lower part 1 of the hollow housing (43), and the switch part has the first lead terminal having the first contact (10).
(5) and the terminal plate (34) in which the second lead terminal (6) having the second contact (11) is implanted, and the contacts (10, 11) exposed on the inner recess surface of the terminal plate. The slider, which is made up of a dome-shaped disc-shaped spring (8) made of metal and is inserted in the upper opening of the housing (43) and moves up and down in the housing, is a coil spring ( When the lever (16) attached to the other end of (15) is operated by lowering the slider and the disc spring of the switch section is reversed by this action, the contacts (5, 6) are closed, A bottom button (45) for holding the lower part of the switch part inserted into the housing through the thin plate flexible part (44) is integrally formed on the lower part of the side surface, which is solved by a push button switch. It

[Action]

According to the present invention, by forming the bottom lid for holding the switch part inserted in the housing in the housing integrally with the housing, the number of components of the push button switch is reduced, and therefore the bottom lid is transported and inserted. The step of making the push button switch unnecessary is simplified, and the work of assembling the push button switch is simplified.

〔Example〕

Hereinafter, a push button switch according to an embodiment of the present invention will be described with reference to the drawings.

1 (a) is a side sectional view showing a main structure of a push button switch according to an embodiment of the present invention, (b) is an external view of a switch portion, and FIG. 2 is a bottom cover shown in FIG. 1 as a housing. It is a figure for demonstrating the principal part which shows being integrally formed.

In FIG. 1 in which the same reference numerals are used in common with FIG. 3 as a conventional example, a push button switch 41 is composed of a switch section 2 and an operation section 42.

The switch unit 2 housed in the housing 43 of the operation unit 42
Shows a pair of lead terminals 5 and 6 embedded in a terminal plate 34 formed by molding a plastic as shown in FIG. The recess 7 of the terminal plate 34 accommodating the disc spring 8 is covered with an insulating sheet 9. The lead terminal 5 has a first contact 10 exposed at the periphery of the recess 7, and the lead terminal 6 has a second contact 11 exposed at the center of the recess 7. The operation unit 42 includes a slider 37 in which the push button 12 is fitted, a housing 43 that accommodates the switch unit 2 and guides the vertical movement of the slider 37, and a lever that swings in conjunction with the vertical movement of the slider 37 via a coil spring 15. It has 16.

A bottom lid 45 is integrally connected to the left side surface of the housing 43 shown in FIG. 1A through a thin plate-shaped flexible portion 44. This bottom lid 45 shows an internal side cross section in FIG. 1 (a), and shows only the front end side surface in FIG. 2, and the inside is hollow, and the lower side surface of the housing and a part of the bottom portion are shown. The lower part of the switch part is supported by the cover and the bottom part, and the front end side wall of the bottom cover shown in FIG. 2 is located outside the side surface of the switch part.

The housing 43 and the slider 37, which are integrally provided with such a bottom lid, are plastic molded products. The slider 37 is fitted with the elastic locking piece 18 that prevents the slider 37 from being pulled out above the housing 43, the rectangular hanging piece 19 that slides on the inner surface of the guide hole of the housing 43, and the upper end portion of the coil spring 15. It has a protrusion.

Then, after inserting the switch part 2 as shown in FIG. 1 (b) into the housing part of the housing 43 from below as shown in FIG. 1 (a), the bottom lid is indicated by arrow C in FIG. 1 (a). And D, the protrusions 47 provided on the inner wall of the housing portion of the switch portion of the housing 43 engage with the through holes 48 provided on the side surfaces at both ends of the bottom lid 45.

When the bottom lid is rotated as shown in FIG. 1 (a), the side plate portion shown in FIG. 2 is located outside the front of the switch portion, and inside the bottom lid, the portions corresponding to the lead terminals 5 and 6 are spaced. It is 45 '. Therefore, when the bottom lid is rotated after inserting the switch portion into the housing portion, the lower side surface of the housing is closed and the switch portion 2 is supported by the bottom lid.

The push button switch 41 configured as described above is operated in the same manner as the conventional push button switch 1, and the lead terminals 5 and 6 are electrically connected and disconnected.

[Effect of device]

As described above, according to the present invention, since the bottom lid for holding the switch portion is formed integrally with the housing, the number of components of the push button switch is reduced, and the push button switch assembling process is simplified. Has a great effect.

Further, since it is desirable to downsize the bottom lid according to the present invention, the bottom portion of the housing is not covered so that the operation sound is reduced as compared with the conventional push button switch in which a part of the slider (hanging piece) collides with the bottom lid. Became.

[Brief description of drawings]

1 (a) is a side sectional view of a push button switch according to an embodiment of the present invention, (b) is an external view of a switch portion, and FIG. 2 is an explanatory view of a main portion of the push button switch shown in FIG. FIG. 3 is a side sectional view of a conventional push button switch, and FIG. 4 is an explanatory view of a main part of the push button switch shown in FIG. In the figure, 2 is a switch part, 34 is a terminal plate, 5 is a first lead terminal, 6 is a second lead terminal, 8 is a disc spring, 10 is a first contact point, 11 is a second contact point, Reference numeral 12 is a push button, 15 is a coil spring, 16 is a lever, 41 is a push button switch, 42 is an operating portion, 45 is a bottom cover, 37 is a slider, 43 is a housing, and 44 is a thin plate flexible portion.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Ryohei Kinoshita 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited (56) References: Actual Publication No. 54-171773 (JP, U) Actual Publication No. 54-7381 (JP, U) Actually opened 58-131528 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A hollow housing (43) accommodates a switch portion (2) in an upright state on an inner surface of a lower portion 1, and the switch portion includes a first portion.
First lead terminal (5) having second contact (10) and second contact
The terminal plate (34) in which the second lead terminal (6) having (11) is implanted, and the contact (10, 1) exposed on the inner recess surface of the terminal plate.
A dome-shaped disc-shaped spring made of metal that is placed opposite to 1)
(8), which is inserted through the upper opening of the housing (43) and moves up and down in the housing is a lever attached to the other end of the coil spring (15) attached to the lower end of the slider.
(16) is operated by lowering the slider, and the contact (5, 6) is closed by the reversal movement of the disc spring of the switch part, and the thin plate-like flexible part is provided on the lower part of one side surface of the housing. A push button switch characterized in that a bottom cover (45) for holding a lower portion of a switch portion inserted into the housing through (44) is integrally formed.