JPS60109118A - Key switch - 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 The present invention relates to a key switch, and more particularly to a key switch having a contact cleaning function.

All conventional key switches have a movable contact that makes only point contact with a fixed contact, and as a result, the electrical life of the contact is shortened due to carbon buildup during repeated contact.

The present invention solves the above-mentioned problems and increases the electrical lifespan.The movable contact piece slides against the fixed contact surface every time the key is inserted or removed from the loose insertion hole and the switch section is turned on or off. A feature of the invention is that the contact surfaces are automatically cleaned by each other.

It is also characterized by controlling multiple actuating bodies with one key, increasing the number of switches compared to conventional products.

The present invention will be explained in detail below.

1 to 9 show an example of the embodiment of the first invention, in which a key switch body (1) is provided with a loose insertion hole (2) and a space (3) in parallel and in communication; A plurality of guide holes (4) are provided perpendicularly from (2) to space (3) in a staggered manner along the loose insertion hole, and each guide hole (4) has a loose insertion element (5). The actuator head end (5a) is pushed into the space (K) by the key (K) inserted into the insertion hole (2).
3) The inside is movable, and the operating body (6) is placed in the space (3).
The key part (K) of the key (I ()) inserted into the loose insertion hole (2)
It is pushed by 2) and can swing against the spring (7)! II+
(8), and this operating body (6) has a movable contact piece (9).
) The base is pushed by the actuator (5) while its tip (9d) is in pressure contact with the actuator head end (5a) and comes into contact with the fixed contact surface (10) and the actuator (6) swings. Follow the fixed contact surface (
10) are integrally attached to enable sliding movement.

The actuating body (6) is pushed by the spring (7) and its protrusion (6a
) is located beside the loose insertion hole (2), and as the protrusion (6a) is pushed by the side edge of the key (K), the spring (7) swings against the pressure and the same. The protrusion (6a) is the key (K)
It is designed to return to its swinging position at the same time as it escapes into the key part (K2).

As a result, as the key (K) begins to be inserted into the loose insertion hole (2), the actuator (5) pushed by the key part (K1)
) pushes the movable contact piece (9) to bring its tip (9a) into contact with the fixed contact surface (10), while the actuating body (6) is pushed by the side edge (K3) of the key and swings. Next, when the key (K) is completely inserted, the operating body (6) pressed by the spring (7) swings back as its protrusion (6a) escapes into the key part 2). , the movable contact piece (9), that is, one end (9a) thereof, is kept in contact with the fixed contact surface (10) and cleaned by sliding it on the same surface, and is fixed in the same manner when the key (K) is removed. The contact surfaces of the contact surface (10) and the tip (9a) can be cleaned against each other.

10 to 18 show an example of implementation of the second invention,
The key switch body (1) is provided with a space (3) which is a multiple (twice in drawing 2) of the free insertion hole (2) in a parallel and communicating manner, and a plurality of spaces (3) are provided at right angles from the free insertion hole (2). Guide hole (4)
are provided in a staggered manner along the free insertion hole to each space (3) (3), and an actuator (5) is provided in each guide hole (4).
is pushed by the dedicated key part (K1) (, 1) of the key (K) inserted into the loose insertion hole (2), and the actuator w4 end (5
a) is movable in space (3) (3), and each space (
3), the actuating body (6) is pushed against the spring (7) by the respective dedicated key parts (Kz) (Kz) of the key (K) inserted into the loose insertion hole (2). Each actuating body (6) is rotatably supported by a shaft (8), and each actuating body (6) has a movable contact piece (9) whose base part is operated while its tip (9a) is in pressure contact with the actuator head end (5a). The fixed contact surface (10) is integrally attached so as to be able to contact the fixed contact surface (10) when pushed by the child (5) and to perform sliding motion following the swinging motion of the actuating body (6). .

Each actuating body (6) is pushed by a spring (7) so that its protrusion (6a) is located beside the loose insertion hole (2), and the protrusion (6a) is attached to the key (K). As it is pushed by the side edge of the key (K), the spring (7) swings against the pressure and returns to swing at the same time as the protrusion (6a) escapes into the dedicated key part (K2) of the key (K). That's what I do.

As a result, as the key (K) begins to be inserted into the loose insertion hole (2), each actuator (5) pushed by the key part (Kl) (K1) moves the movable contact piece (9). While pressing each of them, the tip (9a) is brought into contact with the fixed contact surface (10), and each actuating body (6) is pushed by the side edge (K3) of the key to swing, and then the key (K) is pressed. By being fully inserted, each actuating member 6) pressed by the spring (7) will release its protrusion (
6a) respectively escape into the dedicated key part (K2), they swing back, and the movable contact piece (9), that is, one end part (9)
a) While in contact with the fixed contact surface (10), rub the same surface to clean it, &3i! When pulling out the switch (K), the contact surfaces of each fixed contact surface (10) and each end portion (9a) can be similarly swept fn against each other, and a multiple number of switch parts can be secured.

In both of the above embodiments, it is optional to implement the loose insertion hole (2) as shown in FIGS. 8 and 17, and the loose insertion hole (2) may have a T-shaped or ten-shaped cross section Similarly, by using keys with the same cross-sectional shape, it is possible to secure three or four times the number of switches.

Therefore, the present invention has the following advantages.

■ To open the switch, insert the key into the loose insertion hole, and each time you pull it out, the actuating body swings and slides the integral movable contact piece over the fixed contact surface to remove carbon, etc. ,
The contact surfaces between the two are automatically cleaned on a regular basis, eliminating the adhesion of foreign matter and dramatically increasing the electrical lifespan.

(2) It is possible to secure the number of switch parts that is a multiple of the number of free insertion holes, and has the ability to have a multiple of the number of switch parts than the conventional one while having a cleaning function for the switch part.

[Brief explanation of the drawing]

The drawings show the key switch of the present invention, and FIGS. 1 to 9 show an embodiment of the first invention, in which FIG. 1 is a longitudinal sectional front view, FIG. 2 is a cross-sectional plan view taken along line nn, Figure 3 is a vertical cross-sectional front view when the key is inserted halfway, Figure 4 is a cross-sectional plan view taken along the IV-IV line, Figure 5 is a vertical cross-sectional front view with the key fully inserted, and Figure 6 is a v+- Fig. 7 is a cross-sectional side view along the line ■-■, Fig. 8 is a longitudinal front view showing another embodiment, and Fig. 9 is a cross-sectional view along the line IX-IX. Plan view. FIGS. 10 to 18 show an embodiment of the second invention,
Fig. 10 is a vertical front view, Fig. 11 is a cross-sectional plan view taken along line XI-XI, Fig. 12 is a longitudinal front view taken halfway through insertion of the key, and Fig. 13 is a cross-sectional plan view taken along line Kari-Xllll. , Fig. 14 is a longitudinal sectional front view with the key fully inserted, Fig. 15 is a transverse plan view taken along line W-W, and Fig. 16 is a view of the reservoir.
A vertical cross-sectional side view along the XSII line, FIG. 17 is a vertical cross-sectional front view 1 showing another embodiment, and FIG.
It is a cross-sectional plan view along the line. In the figure, (1) is the cow-swift body (2) is the free insertion hole (3) is the space (4) is the guide hole (5) is the actuator (5a) is the III end (6) is the actuator (9) is the The movable contact piece (9a) is one end part (10) is the fixed contact surface (K) is the key (
K Engineering) (K2) is General Manager of Ki Division Applicant Sunbouronok Co., Ltd. Figure 3 Figure 2 Figure 4 Figure 5 Figure 7 Figure 2 Figure 9 Figure 1θ Figure 12 Figure 1/1λI 13t/1 'Gei74-1A 1st I! Figure 17 Figure 78

Claims (1)

[Scope of Claims] ■ A loose insertion hole and a space are provided in the key switch body in parallel and in communication, a guide hole is provided to penetrate from the loose insertion hole to the space at right angles, and an actuator is inserted into the guide hole. The head end of the actuator moves in the space when pushed by a part of the key inserted in the key, and the actuator swings in the space by being pushed by a part of the key inserted into the loose insertion hole. This operating body has a movable contact piece base that presses against the head end of the actuator and is pushed by the actuator to contact the fixed contact surface and follow the swinging of the actuator. A key switch characterized in that a fixed contact surface is integrally attached to enable sliding movement. ■ Spaces that are multiples of the loose insertion holes are provided in the key switch body in parallel and in communication, and guide holes are provided to penetrate each space at right angles from the loose insertion holes, and the actuator is inserted into each guide hole. The head end of the actuator is movably inserted into the space by being pushed by a part of each key of the key inserted into the loose insertion hole, and the actuator is moved into each space by being pushed by a part of each key of the key inserted into the loose insertion hole. Each actuating body has a movable contact piece base that is pressed against the head end of the actuator and is pushed by the actuator to contact the fixed contact surface and cause the actuator to swing. A key switch characterized in that a fixed contact surface is integrally mounted so that it can be slidably moved.