JPH0747765Y2 - Switch mechanism - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch mechanism suitable for use in electronic musical instruments, electronic toys and the like.

[0002]

2. Description of the Related Art Conventionally, in an electronic musical instrument or the like using a large number of switches, a large number of switches have been prepared and arranged in parallel on a substrate.

[0003]

The above-mentioned conventional electronic musical instruments and the like have the problems that they are expensive because a large number of switches are used and that it takes time to mount the switches.

An object of the present invention is to obtain a switch mechanism that solves the above problems.

[0005]

In order to achieve the above-mentioned object, the present invention forms a plurality of holes along a center line of an elastic square non-conductive film, and makes two holes adjacent to each other. a plurality of movable contacts disposed lower surface to the conductive member of each central portion of the strip, a pair of positioning members closely spaced than the width of the center line and perpendicular direction of the film is disposed sandwiched, 且 between the pair of positioning members
A substrate in which contacts are arranged at the same intervals as the intervals of the plurality of strips, and a pressing member located above the movable contact and pushing down the central portion of the strip of the movable contact. The movable contact is mounted between the pair of positioning members of the substrate in a state of being warped upward, and when the pressing member presses the central portion of the strip, the curvature of the central portion is reversed and the conductivity is reduced. The member is in contact with the contact.

[0006]

A plurality of strips are formed on a non-conductive film having elasticity by forming a plurality of holes, and a conductive member is arranged at the center of the strips. It can be easily installed with the members bent upward. When the central portion of the strip is pressed by the pressing member, the central portion is bent downward at a time when the predetermined amount is pressed, the conductive member comes into contact with a plurality of contact points, and gives the pressed finger a click feeling.

[0007]

Embodiments of the present invention will be described below with reference to the drawings.
The drawing shows a switch mechanism applied to an electronic musical instrument. In the drawings, 1 is a movable contact, 2 is a substrate, and 3 is a key. As shown in FIG. 3, the movable contact 1 includes a center line 5 of a non-conductive film 4 made of, for example, plastic and having a constant width.
A large number of holes 6 are formed at equal intervals along, and a conductive member 8 such as a conductive plate or a conductive foil is bonded to the lower surface of the central portion of the strip 7 sandwiched by the holes 6, respectively. . The substrate 2 is, for example, a keyboard frame, on which a pair of positioning members 9 are arranged at intervals smaller than the width of the non-conductive film 4.
9 is projected. Each positioning member 9 has a length substantially equal to the length of the non-conductive film 4, or is composed of a plurality of positioning member units arranged at regular intervals.

A plurality of, for example, two contacts 10 are formed on the substrate 2 between the pair of positioning members 9, 9 at the same intervals as the intervals of the plurality of strips 7, 7 by, for example, print printing. The movable contact 1 is attached between the pair of positioning members 9, 9 of the substrate 2 in a state of being curved upward in an arc shape, and the conductive member 8 faces the plurality of contacts 10. Each of the plurality of keys 3 has a pressing member 11 below the key 3, is mounted on the substrate 2 so as to be positioned on the strip 7, and can be tilted by a flexible portion 12 thereof. Incidentally, 13
Is the upper lid of the instrument case.

When the key 3 is pushed down from the key release state shown in FIG. 1 to the key pushing completion state shown in FIG. 2, the strip 7 of the non-conductive film 4 of the movable contact 1 is pushed by the pushing member 11. Then, it starts to bend downward, and when it bends to some extent, it is reversed at once and the conductive member 8 comes into contact with the two contact points 10, and the finger feels a click. Thus, the two contacts are connected by the conductive member 8.

[0010]

EFFECTS OF THE INVENTION Since the present invention has the above-mentioned configuration, it is not necessary to use a large number of switches, the cost is low, the configuration is simple, and the assembly is easy. It is obtained and suitable for use in, for example, electronic musical instruments.

[Brief description of drawings]

FIG. 1 is a side view of an embodiment of the present invention applied to an electronic musical instrument.

FIG. 2 is a side view of the above embodiment in a key-depressed state.

FIG. 3 is a perspective view of a part of the movable contact of the above embodiment.

[Explanation of symbols]

 1 movable contact 2 substrate 3 key 4 non-conductive film 5 centerline 6 hole 7 strip 8 conductive member 9 positioning member 10 contact 11 pressing member

Claims (2)

[Scope of utility model registration request] 1. An elastic square non-conductive film having a plurality of holes formed along a center line thereof, and a plurality of strips sandwiched between two holes adjacent to each other are electrically conductive on a lower surface of each central portion. and the movable contact arranged sexual member, a pair of positioning members are arranged in the center line direction perpendicular closely spaced than the width of the film, 且 between the pair of positioning members
A substrate in which contacts are arranged at the same intervals as the intervals of the plurality of strips, and a pressing member located above the movable contact and pushing down the central portion of the strip of the movable contact. The movable contact is mounted between the pair of positioning members of the substrate in a state of being warped upward, and when the pressing member presses the central portion of the strip, the curvature of the central portion is reversed and the conductivity is reduced. A switch mechanism, wherein a member contacts the contact. 2. The pressing member is attached to a key, and a gap between a plurality of strips sandwiched between a plurality of holes of the non-conductive film is equal to a gap between the keys. Switch mechanism.