JP2006313661A - Film switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a film switch which has a high sensitivity and can be used as it is even if it is not covered by a tube cover, etc. and which is easy to be inserted into a tube cover and is capable of bending wiring. <P>SOLUTION: A film switch is composed of a large number of separated conductive surfaces with narrow insulation parts in-between provided in series on the inner surface of an upper strip and a large number of U-shaped small strips which are bridge-conducted with the above conductive surface in a spring contact by the upper strip having corresponding window holes to be extended and bent and contacted on a lower strip and by an end of the above lower strip being folded upward and go through each of the window holes, and of small grooves for bending wiring provided between each window holes, with insulation being made between the above conductive surfaces by pushing down one of the above U-shaped small strips, and of return conductive surfaces provided inside the above upper strip or the lower strip corresponding with the conductive surface. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a film switch.

There is Japanese Patent Application No. 2004-160488 as this type of film switch. In this patent application, an insulating film having a spring repulsive force is bent up and down, and electrodes provided opposite to the end portions of the upper piece and the intermediate piece are separated by pushing down from above, and when the push is released, the lower film is lowered. The electrode is in spring repelling contact with the upper electrode.
Japanese Patent Application No. 2004-160488

  However, in the above film switch, since the intermediate piece is exposed, the upper piece is less than half the width of the intermediate piece, and its end is a free end. Therefore, there is a problem that the warp is warped, and therefore, there is a problem that it cannot be used unless it is inserted into the tube cover and the warp of the upper piece is corrected. Moreover, there is a problem that it is not easy to insert the upper piece into the tube with a sled spring.

  Moreover, since the intermediate piece is long in the film switch direction together with the upper piece, there is a problem that the sensitivity of pushing down is particularly slow.

  In the present invention, a window hole is provided in the upper piece and extended and bonded under the lower piece, so that the warp caused by the free end is shortened to half, etc., and is easily inserted into the cover tube. At the same time, it can be used even when it is not put in the tube, and the cross-linking intermediate piece is made into a number of U-shaped strips to improve the sensitivity of pushing down, and a narrow groove is provided between each window hole. It was made easier to bend and solve this problem.

  In the present invention, since the upper hole is provided with the window hole and folded under the lower piece and bonded as described above, the upper piece warp caused by the repulsion of the film is eliminated, and the tube cover is smoothly formed. The effect that it can insert is produced.

  By preventing warping of the upper piece, the film switch can be used while being bare.

  Since the intermediate piece that cross-links between the conductive surfaces is formed into a U-shaped thin piece, the effect of significantly improving the sensitivity of pushing down and reversing up and down is produced.

  Normally closed, that is, there is an effect that a disconnection detection circuit or the like is unnecessary by a switch configuration in which a conductive surface having an insulating portion is normally bridged between conductive surfaces.

  The film switch of the present invention produces a remarkable effect when used as a nursing bed sensor, an automobile bumper switch, various security switches, and a mat switch.

  Providing the return conductive surface has the effect that the two terminals can be provided close to each other.

  The present invention is provided with a large number of divided conductive surfaces in series with the inner surface of the upper piece sandwiching a small insulating portion, and a window hole is provided in parallel on the upper piece, and is extended and bonded under the lower piece, A large number of U-shaped strips that cross-conductively pass through the bottom of each window hole by reversing the lower piece and are bridge-conductive are provided, and any one of the U-shaped strips is pushed down. Insulating the conductive surfaces, providing a narrow groove for bending between the window holes, and providing a return conductive surface corresponding to the conductive surface on the inner surface of the upper or lower piece, It forms.

  As shown in FIG. 1, the longitudinal film switch 1 is formed by providing a plurality of window holes 3 on the upper piece 2 of the insulating film having repulsive properties and narrow grooves 4 between the window holes 3, and extending back below the lower piece 5. And glue. Reference numeral 2a denotes an adhesive surface by extension folding. Reference numeral 6 denotes a series conductive surface provided by printing or the like on the inner surface of the upper side of the upper piece 2 and is insulated by being divided into small widths by a narrow groove 4 for each length of two window holes 3. Reference numeral 7 denotes a bridging U-shaped strip which is folded back from the other end of the lower piece 5 through the window hole 3 and repels the conductive surface 6 so as to be separated and insulated. The six are cross-linked so that the entire length is conductive. FIG. 2 shows a circuit configuration of the film switch 1. The terminals 8a and 8b are provided at both ends of the conductive surface 6 as shown in FIG. 2A, and when the return conductive surface 6a is provided, FIG. As shown in b), terminals 8a and 8b can be provided close to one end of the film switch 1 close to each other.

  As described above, the film switch 1 is formed and used as it is, and sometimes it is used by being inserted into the tube cover 9 as shown in FIG.

  In the normal state, the film switch 1 is made conductive by bridging all of the conductive surface 6 by repulsion of the U-shaped strip 7 as shown in FIG. 3 (a), but as shown in FIG. 3 (b). When one U-shaped strip 7 below the window hole 3 is pushed down, the U-shaped strip 7 is separated from the conductive surface 6 and becomes insulative. Regardless of the position of the U-shaped strip 7, the entire conductive surface, that is, the entire length, becomes non-conductive. Actually, as shown in FIG. 3C, the upper piece 2 which is the side edge of the window hole 3 is also bent to assist the pushing-down of the U-shaped strip 7.

  The film switch 1 can be bent and wired as shown in FIG. 4B based on the narrow groove 4 for bending.

  Therefore, the film switch 1 of the present invention issues an alarm by a signal that detects disconnection, and is useful for control of automatic stop. Since it can be bent, there is an example in which it is attached to the bumper 10a of the automatic guided vehicle 10 and used as a bumper switch as shown in FIG.

  Further, as shown in FIG. 5B, the film switch 1 is laid on the bed 11 and used as a bed sensor. When the patient is on the bed 11, the U-shaped strip 7 is pressed to insulate between the conductive surfaces. However, when the patient falls from the bed 11 or is absent, the U-shaped strip 7 is applied to the conductive surface 6. Since the entire length is made conductive by repulsive contact, an alarm (not shown) or the like is activated to notify the appropriate department of the absence of the patient.

  Further, by arranging a large number of film switches 1 in parallel, a mat switch 12 having a wide detection range can be obtained as shown in FIG.

  Since the film switch of the present invention can detect non-conductivity by pressing down and act as a switch, and can detect the normal state of conduction due to release of the push and act as a switch, it can be used as a switch having a length. It can be widely used in various directions.

(A) is a partial perspective view of a film switch, (b) is a partial plan view of the same. (A) is a circuit diagram, (b) is a circuit diagram of an example in which a return conductive surface is provided. (A) is an enlarged cross-sectional view showing a state in which the U-shaped strip is repulsively contacted with the conductive surfaces and cross-connects between the conductive surfaces, (b) is an enlarged cross-sectional view showing an insulating state by pushing down, (c) Is an enlarged sectional view showing the subsidy by pushing down the side edge of the window hole (A) is an enlarged side view of a narrow groove portion of a film switch, (b) is a partially enlarged side view showing an example of bending. (A) is a perspective view showing an example of use as a bumper switch of an automatic guided vehicle, (b) is a perspective view showing an example of use as a bed sensor, and (c) is a perspective view showing an example of use as a mat switch. An enlarged cross-sectional view showing an example in which a film switch is inserted into a tube cover

Explanation of symbols

1 is a film switch, 2 is an upper piece, 2a is an adhesive surface by folding the upper piece, 3 is a window hole, 4 is a narrow groove, 5 is a lower piece, 6 is a conductive surface, 7 is a U-shaped thin piece, 8a and 8b are terminals, and 9 is a tube cover. Automated guided vehicle 10a Bumper 11 Bed 12 Mat switch

Claims (3)

  A number of divided conductive surfaces are provided in series on the inner surface of the upper piece, sandwiching a small insulating portion, and a window hole is provided in parallel on the upper piece, and is extended and bonded to the lower piece. A large number of U-shaped strips are formed which are repelled against the conductive surface through each window hole by folding upward and cross-conductively conductive, and the conductive surface is formed by pushing down one of the U-shaped strips. A film switch characterized in that the gap is insulated.   The film switch according to claim 1, wherein a narrow groove for bending is provided between the window holes.   The film switch according to claim 1 or 2, wherein a return conductive surface is provided on the inner surface of the upper piece or the lower piece corresponding to the conductive surface.

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