JP7281244B2 - Switch sensitivity improvement device for film switches - Google Patents

Description

The present invention relates to an improvement in the pressing sensitivity of a film switch and a protective device.

Film switches are disclosed in Japanese Patent No. 4545635 and Japanese Patent No. 4671237. In both publications, an insulating film is folded back to form a strip-like upper and lower side having a repulsive property, and a large number of relative window holes are arranged in parallel on the upper and lower sides of the contacts so that the respective window holes face the contacts and are connected to the conductive wires. , and the switching action is performed by contacting and separating the contact pieces at the location where the pressure is applied.

The cylindrical outer cover and base rail through which these film switches are inserted are described in Japanese Utility Model Registration No. 3128637. In this publication, a sealing body 22 is provided in the end space 2a of the outer cover in order to eliminate the non-sensible portions at both ends of the long switch, and the sealing body 22 is flexed in the end space 2a when pressed. It is described that the switch is turned on through the actuator plate 7 to eliminate the insensible portions at both ends, and that the lower part of the outer cover 11 is mounted on the base rail 10 and fitted. .

Japanese Patent No. 4545635 Japanese Patent No. 4671237 Utility Model Registration No. 3128637

However, since the electrodes 23 and 24 in the above publication are placed on the actuator plate 7 and are close to the lower surface of the outer cover 11, there is a problem that they shift and disable the switch operation. Moreover, since the structure is complicated, there is a problem that inspection, repair, etc. are not easy.

Further, according to the description that the pedestal rail 10 is mounted on the lower part of the outer cover 11 in the shallow dish-shaped fitting groove on the upper surface, the outer cover 11 loses its shape when it receives pressure, and the electrodes 23 and 23 inside the outer cover 11 are deformed. There is a problem that 24 may be crushed, twisted, or otherwise damaged.

In the present invention, the film switch is inserted into the lower half part of the outer cover which does not move, and the upper half of the outer cover faces the film switch. The film switch is pressed by the pressing piece and the horizontal piece to operate the switch with high sensitivity.

In addition, the pedestal rail on which the outer cover is fitted is provided with a deep fitting groove so that the outer cover is mounted and fitted deeply so that the outer cover does not lose its shape. Solve the problem by preventing it from happening.

According to the present invention, since the film switch is inserted into the lower half of the outer cover, the film switch does not shift due to pressing.

When the film switch receives pressure from the vertical pressing piece and the left and right horizontal pieces, it responds sensitively to switch operation.

By slanting the left and right horizontal pieces for pressing, the effect is obtained that the film switch can further improve the pressing sensitivity from the oblique angle.

The pedestal rail is provided with a deep fitting groove so that the outer cover is deeply mounted and fitted so as not to lose its shape, so that the film switch in the outer cover is prevented from being crushed or twisted due to the shape of the outer cover being deformed.

1 is a perspective view showing the first embodiment of the present invention, showing separately a film switch, an outer cover, and a pedestal rail; FIG. Cross-sectional view showing the assembled state (a) is from above, (b) is from diagonally upper left, and (c) is a sectional view showing the state when pressed from diagonally above right. Fig. 2 shows a second embodiment of the present invention; Cross section showing Sectional drawing which shows 3rd Example of this invention

In the present invention, a film switch is inserted into the lower half of an outer cover having a hollow arch-shaped cross section, and a vertical pressing piece extends from the center of the top of the outer cover toward the center of the upper surface of the film switch, and vertical pressing pieces extend from both left and right sides. A horizontal piece for pressing is provided toward the lower part of the pressing piece, and the film switch is pressed by these pressing pieces to operate the switch with high sensitivity upon receiving pressure from above and diagonally from the left and right sides of the outer cover. make it

In addition, the pedestal rail increases the longitudinal length of both side plates and forms a deep fitting groove between the both side plates so as to retain the shape of the outer cover. It is constructed so as not to cause troubles such as twisting.

FIGS. 1 to 3 show a first embodiment of the present invention, in which a strip-like switch body is formed by folding back a repulsive insulating film along the longitudinal direction, and an upper plate 1a of the switch body is provided with a longitudinally extending film. Window holes 2 are provided side by side at intervals in the direction, and a contact 3b exposed in the window 2 and connected to a conductive wire is provided on the top surface of the elastic strip 1b, and the contact 3b is in repulsive contact. A film switch F is formed by providing a contactor 3a connected to a conductive wire on the lower surface of the facing upper plate 1a, and turning the switch ON and OFF by contacting and separating the contactors 3a and 3b at a position receiving pressure.

The film switch F is inserted into the lower half 4a of the rubber outer cover 4 having a hollow arch-shaped cross section and fixed by adhesion. A vertical pressing piece 5 and horizontal lateral pieces 6a and 6b are provided toward the bottom of the vertical pressing piece 5 from the left and right sides. The pressing piece 5 and the horizontal pieces 6a and 6b are made of the same material as the outer cover 4, extend in the longitudinal direction of the outer cover 4, and are provided close to each other so as to press the film switch F anywhere.

When the film switch F is used, the bottom portion 4b of the outer cover 4 is mounted on the pedestal rail 7 and installed at the place of use.

When the outer cover 4 of the film switch F receives a pressure from above or diagonally from above, the film switch F is pushed downward by a vertical pressure piece 5 or by a horizontal piece 6a, as shown in FIGS. , 6b, the film switch F is turned on and off by contacting and separating the contacts 3a and 3b at the pressed portions.

FIG. 4 shows a second embodiment of the present invention, in which the left and right horizontal pieces 6a and 6b are slanted with a high outside and a low inside so as to prevent the film switch F from being pressed obliquely from above. It was designed to further improve the reaction sensitivity to pressure. Other configurations and actions are the same as those of the first embodiment.

FIG. 5 shows a third embodiment of the present invention, in which side plates 7a and 7b on both sides of a pedestal rail 7 are elongated, and a deep fitting groove 7c is provided between them to make the outer cover 4 deep. A little more than half of the cover 4 is mounted on the film switch F to prevent it from collapsing in shape, thereby preventing the film switch F from being crushed or twisted due to excessive pressure, pressure, and loss of shape of the cover. Other configurations and functions are the same as those of the first and second embodiments.

INDUSTRIAL APPLICABILITY The present invention can be widely used by dramatically improving the switch response sensitivity without shifting the film switch and by protecting the film switch from being crushed or twisted due to deformation of the outer cover. .

1a is the top plate of the switch body 1b is the elastic strip of the switch body 2 is the window hole 3a and 3b are the contacts 4 is the outer cover 4a is the lower half of the outer cover 4b is the bottom part of the outer cover 5 is the vertical pressing piece 6a , 6b is a horizontal lateral piece 7 is a pedestal rail 7a and 7b are side plates 7c is an insertion groove F is a film switch

Claims (2)

The film switch is inserted into the lower half of the outer cover so as not to shift, and a vertical pressing piece is directed from the top center of the outer cover toward the upper surface of the film switch, and the left and right sides are directed toward the lower part of the vertical pressing piece. 1. An apparatus for improving the switch sensitivity of a film switch, characterized in that a horizontal piece for pressing is provided at the bottom of the film switch, and the pressing of the pressing piece and the horizontal piece improves the switch sensitivity of the film switch due to pressing. 2. An apparatus for improving the switch sensitivity of a film switch according to claim 1, wherein the left and right pressing horizontal pieces are inclined such that the outside is high and the inside is low to further improve the sensitivity of pressing the film switch from obliquely above.

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