JP2005340112A - Film switch using spring bounce - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a novel using method of a film switch so that the film switch, which is conventionally switched on by pushing, forms a closed circuit in a normal condition using spring bounce of a film of the film switch. <P>SOLUTION: The present invention is the film switch using spring bounce, which is characterized in that a flat insulative film having spring bounce is bent up and down, upper and lower electrodes are provided to confront with a top surface and a middle surface or the middle surface and the bottom surface, and the lower electrode contacts with the upper electrode with the spring bounce when the pushing force from the upper side is released. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a film switch using a spring repulsive force, and more particularly to a film switch in which a lower electrode is in spring repelling contact with an upper electrode when there is no pressing from the upper surface.

  The film switch of Japanese Patent Application No. 2003-113922 filed earlier by the applicant of the present application discloses that the upper and lower electrodes are spaced apart from each other so that the upper and lower electrodes come into contact with each other when pressed from above. .

Therefore, when the film switch of the above patent application is used as a mat switch for confirming the absence of a person on the bed or a mat for theft prevention placed under the figurine, the switch is pushed by a person or figurine. Because it is detected that the state of electrical contact that is in contact is the start (normal state) and the contact is released and becomes non-conductive, the circuit continues to consume electricity during use and is always in the conductive state. There is a problem that there is a fear of use because there is a risk of overheating.
Japanese Patent Application No. 2003-113922

  The problem to be solved by the present invention is to provide a novel film switch that can be detected by conducting in the absence of a person or an object, instead of the conventional switch operation by pushing.

  In the present invention, a flat insulating film having a spring repulsive force is folded into a shape such as an upper and lower trihedron, a four-letter shape, and the upper and lower electrodes are opposed to the positions where the upper surface and the intermediate surface or the intermediate surface and the lower surface are displaced. This problem is solved by sending a signal to a detector or the like by bringing the lower electrode into contact with the upper electrode by spring repulsion when there is no push from the upper surface.

  As described above, according to the characteristics of the insulating film that repels the spring, when the push from the upper side is released, the lower electrode is spring repelled and is in contact with the upper electrode to conduct electricity. When used in bed sensors that detect the absence of anti-theft, anti-theft sensors placed under articles, etc., non-conducting open circuits pressed against people and articles can be made normal, As a result, it is possible to prevent the wasteful use of the battery and to eliminate the possibility of an overheating accident due to continuous conduction.

  In addition, the present invention is light and has the effect of being able to bend and wire vertically and horizontally.

  By providing the return line, there is an effect that a signal can be drawn from one direction.

  In the present invention, when a flat insulating film having a spring repulsive force is bent up and down and upper and lower electrodes are provided relative to the upper and intermediate surfaces or the end portions of the intermediate and lower surfaces, the pressing from above is released. The lower electrode is in spring contact with the upper electrode, and the film switch is formed as a single or a continuous long parallel shape, and each electrode is vertically or vertically separated in series or in parallel. A single or band-like switch was formed by wiring and connecting. The electrode can be formed freely and inexpensively by forming a film and an electrode by printed wiring on the film, and when forming a continuous band-like switch, the connection of the electrode is changed in series and in parallel. Therefore, it is possible to select a conductive condition suitable for the application.

  A film switch 1 shown in FIG. 1 to FIG. 4 is formed with an insulating film 2 having a spring repulsive force.

  In FIG. 1, the other end of the intermediate surface 3 a following the one end 3 of the strip-shaped insulating film 2 having a spring repulsive force is folded back 4 to form a lower surface 5, and the other end of the lower surface 5 is placed on the one end 3. The folded upper surface 7 is formed with a crossed upper surface 7 on one end 3, and electrodes 8 a and 8 b are formed on the relative inner surfaces of the one end 3 and the upper surface 7. The lower electrode 8b normally comes into contact with the upper electrode 8a by the spring repulsive force of the turn-up 4 as shown in the upper figure when not pressed from above.

  For this reason, the folded back 4 is bent as shown in the figure, and a spring repelling force is given to the one end 3. On the other hand, the turn 6 is folded or close to a U shape to prevent the upper surface 7 from rising. In addition, instead of folding the folded back 6 into a U shape or the like to reduce the repulsive force, the repulsive force can be eliminated by thermal processing or the like.

  FIG. 2 shows an example in which upper and lower electrodes 8 a and 8 b are provided opposite to each other at the deviation points of the intermediate surface 3 a and the lower surface 5 of the insulating film 2.

  In FIG. 3, the insulating film 2 is folded into an ellipse having an upper surface 7 and an intermediate surface 3a crossing each other, electrodes 8a and 8b are provided at the relative positions of the upper surface 7 and one end 3 of the intermediate surface 3a, and pressed from above. As shown in the figure below, the end of the upper surface 7 pushes the base side of the intermediate surface 3a so that the electrodes 8a and 8b are separated from each other.

  FIG. 4 shows a film switch 1 formed by folding an insulating film 2 into a four-letter shape. The intermediate surface 3a of the insulating film 2 is bent 4 to form a hypotenuse-shaped upper surface 7, a hanging portion 7a hanging from the upper end, and the tip of the hanging portion 7a from the hole 3b to the lower side of the intermediate surface 3a. The electrodes 8 a and 8 b are formed so as to be opposed to the end portions of the intermediate surface 3 a and the lower surface 5. When the oblique upper surface 7 is pressed, the lower surface 5 is separated from the intermediate surface 3a to separate the electrodes 8a and 8b, and the pressing is released to contact the electrodes 8a and 8b.

  FIGS. 5 to 8 are developed views of an insulating film showing an example in which a plurality of film switches having the above-described configuration are continuously formed in parallel and integrally formed in a long shape, and a series wiring is provided between the electrodes 8a and 8b. An example of wiring is shown.

  In the example of FIG. 5, the electrode 8b to be wired on the inner surface of the upper surface 7 is wired by providing a disconnection portion 9, and the bridging wire 10 that connects the disconnection portions 9 is provided on the intermediate surface 3a. By connecting the wires 8a with the return wire 11, a signal can be drawn from one direction with the lead wires 12a and 12b connected to one end. In the example of FIG. 6, a disconnection portion is provided on the electrode 8 a wired on the intermediate surface 3 a, and a bridging wire 10 is provided on the lower surface 5. In the example of FIG. 7, the broken portion 9 is provided on the electrode 8 a disposed on the intermediate surface 3 a, and the bridging wire 10 is provided on the inner side of the upper surface 7. In the example of FIG. 8, the electrode wire 8 b provided with the disconnection portion 9 is disposed below the intermediate surface 3 a, and the bridging wire 10 is provided at a position opposite to the lower surface 5. Each of these strip-shaped film switches 1 is configured in a normal state without pressing to form a series circuit by connecting between the electrode wires 8a where the bridging wire 10 is disconnected as shown in (a) of each figure. As shown in (b), if the bridge line 10 is separated even at one place, the circuit is opened and becomes a non-conductive state. For example, when used as a bed sensor, a person is on the bed and presses at any one place on the upper surface. If it is done, it will not conduct electricity, and when the person is gone and all the push is released, the intermediate surface 3a or the lower surface 5 returns to normal state by spring repulsion and conducts an alarm to notify the absence of a person. It will be done.

  FIG. 9 is a development view of the above-described four-shaped film switch showing an example in which the electrode wires 8a and 8b are arranged in parallel. In these cases, even if one point is in a normal state due to spring repulsion and the electrodes 8a and 8b are in contact with each other, they are electrically connected. It can be used for purposes such as detecting changes in release, for example, preventing theft of display items, and detecting changes in ground looseness after being set in the ground. Instead of forming a continuous band of films, a plurality of independent film switches 1 may be connected in parallel.

  FIG. 10 shows an example in which the tip portion of the intermediate surface 3a is formed in a bifurcated manner and the bridging lines 10a and 10b are provided. When the end portion is pressed as shown by the arrow in FIG. This is to avoid the situation where the inner part does not leave depending on the nature, that is, the pressure is not detected. As shown in Fig. (A), even if a light pressure is applied to the end, the fork is surely lowered and separated. It is possible to improve the sensitivity.

  FIG. 11 shows an example in which the individual or belt-like film switch 1 is covered with a covering material 13 such as an insulating cylinder with a pressing member capable of pressing the upper surface and the intermediate surface, a bag, and a cord. In addition to stabilizing the shape of the switch, preventing damage and ensuring waterproofing, it is possible to assist the correct operation of each surface against pressing. Reference numeral 14 denotes an elastic body such as a sponge that reinforces the repulsive force.

  In the above description, it has been described that the detection is performed by the contact conduction by the release of the push from the separated state of the electrodes 8a and 8b, but the closed circuit becomes an open circuit by the reverse, that is, the push away. It can also be used in such a way that the detection function works by switching.

  The film switch of the present invention can obtain an unprecedented switch action, and can be widely used in a variety of situations as a single switch or as a strip-like long type switch.

1 is a longitudinal sectional view of the first embodiment of the film switch of the present invention and its operation diagram. Vertical section of the second embodiment and its operation diagram Vertical sectional view of the third embodiment and its operation diagram Vertical section of the fourth embodiment and its operation diagram FIG. 5 is a development plan view of the film switch of the fifth embodiment, a longitudinal sectional view in a folded state, and an operation diagram thereof. Development plan view of film switch of other embodiment, longitudinal sectional view of the folded state and its operation diagram Fig. 3 is a development plan view of a film switch according to another embodiment, a longitudinal sectional view in a folded state, and an operation diagram thereof. Development plan view of film switch of different embodiment, longitudinal sectional view of the folded state and its operation diagram Each developed plan view of four examples corresponding to the fifth to eighth embodiments showing a sixth embodiment in which the electrodes are connected in parallel. Exploded plan view of the film switch of the seventh embodiment, operation diagram in use state The longitudinal cross-sectional view which shows the Example which coat | covered the film switch of each above-mentioned Example with the coating | covering body

Explanation of symbols

1 is a film switch 2 is an insulating film 3 is one end 3a is an intermediate surface 3b is a hole 4 is folded 5 is a bottom surface 6 is folded 7 is an upper surface 8a, 8b is an electrode wire 9 is a broken line 10 is a bridging wire 11 is a return wire 12a, 12b is a lead wire 13 is a covering body 14 is an elastic body

Claims (7)

  A flat insulating film with spring repulsive force is bent up and down to provide upper and lower electrodes relative to the upper and intermediate surfaces or the edges of the intermediate and lower surfaces, and the lower electrode when the push from above is released A film switch using spring repulsive force, characterized in that the spring repels and contacts the upper electrode.   The film switch according to claim 1, wherein the insulating film is folded into a four-letter shape, and upper and lower electrodes are provided opposite to the end portions of the intermediate surface and the lower surface.   The film switch according to claim 1, wherein the film switch is formed as a single body or a long shape in which a plurality of the films are continuously arranged in parallel, and the electrodes are wired and connected separately in series or in parallel.   The film switch according to claim 1, wherein a return line is provided at one end of the wiring to draw a signal from one direction.   The film switch according to any one of claims 1 to 4, wherein the upper and lower electrodes are used such that the device is operated by being opened apart and stopped by contact.   The film switch according to any one of claims 1 to 5, wherein the film switch is covered with an insulating cylinder with a pressing member capable of pressing an upper surface and an intermediate surface, a bag, and a cord.   The film switch according to any one of claims 1 to 6, wherein an elastic body for increasing a spring repulsion pressure is provided under the lower electrode.

Images