JP3002849U - Cord switch - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide an inexpensive cord switch which can be manufactured with high yield. According to the present invention, there is provided a cord switch in which the periphery of a contact wire is covered with a conductive rubber material and the contact wire is composed of a braided wire capable of following expansion / contraction deformation of the conductive rubber material.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a code switch that conducts a switch action by conducting electricity no matter which part in the longitudinal direction is pressed.

[0002]

[Prior art]

 As a cord switch of this type, the applicant proposes a structure in which a pair of contact wires are arranged with a conductive elastic body to be pressed in between and the outside is covered with a cord member in Japanese Utility Model Laid-Open No. 62-100644. However, the pressurized conductive elastic body is expensive, and many steps are required for processing for use in the cord switch, which increases the cost of the product. We tried to construct a structure in which the contact lines are opposed to each other by leaving as a gap for pressure conduction.

[0003]

[Problems to be solved by the device]

 During this trial, there was a problem that the contact wire was short-circuited when the contact wire peeled off from the cord member due to the absence of the conductive elastic body under pressure. This was due to the conductive rubber material mixed with carbon around the contact wire. It was resolved to improve the biting force with the cord member by coating with. However, if these are extruded together with an extrusion molding machine, the conductive rubber material that has expanded due to the heat of vulcanization cools to room temperature and shrinks, and as the expansion coefficient changes drastically, there is almost no contraction or change. There is a problem that a peeling part occurs between the contact wire such as a wire, and when it does not peel off, the conductive rubber material contracts and the contact wire will be meandering deformed due to the difference in length, and the cord switch itself will be deformed. Occurred.

[0004]

[Means for Solving the Problems]

 The present invention intends to solve such a problem by covering the periphery of the contact wire with a conductive rubber material and constructing the contact wire with a braided wire capable of following expansion and contraction deformation of the conductive rubber material. .

[0005]

[Action]

 In the present invention, since the periphery of the contact wire of the cord switch is covered with the conductive rubber material, the biting force with the cord member is remarkably improved, and the contact wire can follow the expansion / contraction deformation of the conductive rubber material. Since the braided wire is configured with the wire, the braided wire follows the expansion deformation of the conductive rubber material due to the heat of the vulcanization molding after the extrusion molding and the contraction deformation to the normal temperature state.

[0006]

【Example】

 Embodiments will be described below with reference to the drawings.

FIG. 1 shows a cord switch according to a first embodiment of the present invention, in which circular braided wires 1a and 1b made by braiding thin wires such as copper wires with a bias, and circular braided wires 1a and 1b are made of rubber material. Is covered with a conductive rubber material 2 formed by mixing carbon powder or the like into contact wires, and these are arranged face-to-face with a pressure-conducting gap 3 which can be contacted by an external pressure. The periphery is covered with a cord member 4 such as silicone rubber which has an excellent elastic recovery property. The production is carried out by simultaneously extruding by an extrusion molding machine (not shown), followed by vulcanization molding.

Since the braided wires 1a and 1b are covered with the conductive rubber materials 2 and 2, and the conductive rubber materials 2 and 2 stick to the cord member 4, the circular braid wire is directly fed to the cord member 4. The biting force is significantly improved as compared with the case of applying it, and there is no risk of peeling due to deformation or bending when pressed, and since the conductive rubber material 2 is in direct contact when pressed, the conductive Since rubber 2 plays a cushioning role, it is possible to prevent wear and damage of the circular braided wire due to long-term use as much as possible.

Further, since the circular knitted wires 1a and 1b are knitted into a bias, they can be appropriately expanded and contracted, so that the conductive rubber material 2 can be sufficiently expanded and expanded (expanded) due to vulcanization heat and the subsequent contracted deformation. Therefore, the meandering deformation due to peeling or tightness in the manufacturing process does not occur.

FIG. 2 shows a second embodiment of the present invention, in which the contact lines composed of two circular braided wires 1a and 1b covered with a conductive rubber material 2 are arranged in parallel and face each other on the contact lines. Then, a bridge conductor 5 made of a conductive rubber material having a width bridging between both contact lines is arranged with a gap 3 for pressure-conducting conduction, and a supporting member protruding from between the contact lines toward the bridge conductor 5 side. The protrusion 6 is extended and covered with the cord member 4 to form a cord switch.

In the cord switch of this embodiment, since the bridge conductor 5 is made of the conductive rubber material 2 having elasticity, it can be naturally installed on a smooth surface, and the bridge conductor 5 side is placed outside. In this way, the bridge conductor 5 can be easily bent and installed, for example, on a bumper (not shown) of an unmanned vehicle having a bent portion, and since the supporting projections 6 are provided, the bridge conductor 5 is bent by the bending pressure at the bent portion. Since it is possible to prevent the power from approaching the contact line, it is possible to reliably prevent the energization due to the influence of only bending. Of course, when a large pressing force to be detected is applied, the supporting projection 6 is crushed and deformed, so that the bridge conductor 5 is bridge-contacted between the contact lines to be energized and the cord switch acts as a switch.

FIG. 3 shows a third embodiment of the present invention, in which the contact lines composed of two circular braided wires 1a and 1b covered with a conductive rubber material 2 are arranged in parallel and face each other on the contact lines. Then, a bridge conductor 5 made of a conductive rubber material having a width bridging between both contact lines is arranged with a gap 3 for pressure conduction being provided, and these are covered with a cord member 4 to form a cord switch. Of the bridge member 5 of the cord member 4 is provided in one or a plurality of rows along a part or the entire length of the upper surface of the bridge conductor 5 to reach near the contact line.

In this cord switch, since the tension on the bridge conductor 5 side is released by expanding the cut line 8, the bent wiring and the curved wiring can be made more easily, and the conductive force can be unnecessarily applied by bending pressure or twisting pressure. It will be avoided.

FIG. 4 shows a fourth embodiment of the present invention, in which a support projection 6 protruding from between the contact wires toward the bridge conductor 5 side is provided. Is a fifth embodiment, in which extension portions 3a and 3b of the gap 3 for pressure conduction are provided outside both sides of the contact wire and the bridge conductor 5, and the bridge conductor 5 is provided in the extension portions 3a and 3b from the contact wire side. It shows an example in which supporting projections 6a and 6b projecting to the side are provided or facing supporting projections 6c and 6d are provided in the extension portions 3a and 3b, and the point where the cutting line 7 is provided is the third point. This is the same as the embodiment, and the action of each ridge projection is the same as in the second embodiment.

6 to 7 show a sixth embodiment of the present invention, in which four contact wires composed of circular braided wires 1a, 1b, 1c and 1d coated with a conductive rubber material 2 are formed, The contact lines are arranged in parallel at equal intervals, and a bridge conductor 5 made of a conductive rubber material is arranged so as to face the center of the contact line array and to leave a relatively large gap 3 for conducting pressure. The outside of these is covered with the cord member 4 and integrally molded. The bridge conductor 5 is formed with a width that reliably bridges between two adjacent contact lines.

In the cord switch configured as described above, as shown in FIGS. 7 (a), (b) and (c), the combination of two contact lines in which the bridge conductor 5 cross-links is changed depending on the pressing direction. Therefore, the direction of pressing can be detected by identifying this conductive line. Even if a bridge conductor may cross-link between three or more contact lines to conduct electricity, the direction can be specified by the design process on the detector side unless all contact lines conduct simultaneously. It is possible.

This direction detection type cord switch detects the position direction of the contacting object when it is contacted when it is attached to, for example, a robot or an unmanned guided vehicle, and therefore, conventionally, it has to be stopped at the spot. Since it is possible to immediately avoid reversing to the opposite side of the contact object and continue the work, the application will greatly expand as a sensor means for preventing accidents and eliminating interruption time.

Although the braided wire has been described as a circular braided wire in the above embodiments, the same effect can be obtained by using a braided wire braided into an elliptical shape or a rectangular shape in cross section.

[0019]

[Effect of device]

 As described above, according to the present invention, since the periphery of the contact wire in the cord switch is covered with the conductive rubber material and the contact wire is formed by the braided wire which can follow the expansion / contraction deformation of the conductive rubber material, The risk that the contact wire may peel off from the cord member due to the biting force between the material and the cord member is reliably eliminated, and the meandering deformation due to the peeling between the conductive rubber material and the braiding wire, which expands and contracts due to thermal expansion and shrinkage, is prevented. There is an effect that it is possible to provide a cheap and inexpensive cord switch.

[Brief description of drawings]

FIG. 1 is an end view showing a first embodiment.

FIG. 2 is an end view of the second embodiment.

FIG. 3 is a partial perspective view showing a third embodiment.

FIG. 4 is an end view of the fourth embodiment.

5 (a) and 5 (b) are end views showing a fifth embodiment.

FIG. 6 is an end view of the sixth embodiment.

FIG. 7 is an operation example diagram of the same.

[Explanation of symbols]

 1a, 1b, 1c and 1d are braided wires 2 are conductive rubber materials 3 are pressure conductive gaps 4 are cord members 5 are bridge conductors 6, 6a, 6b, 6c, 6d are ridged projections 7 are cut lines

Claims (6)

[Scope of utility model registration request] 1. A cord switch in which the outside of a pair of contact lines facing each other with a gap for pressure conduction being formed is integrally molded by an extrusion molding machine while being shape-covered with a cord member having resilience. A cord switch, wherein the contact wire is covered with a conductive rubber material, and the contact wire is formed of a braided wire capable of following expansion and contraction deformation of the conductive rubber material. 2. A pair of contact lines arranged in parallel at a distance and a bridge conductor arranged opposite to each other with a gap for conducting pressure being provided on the contact lines are kept by a cord member having a restoring property. In a cord switch integrally formed by an extrusion molding machine so as to form a supporting projection that protrudes toward the bridge conductor between the pair of contact lines of the cord member, the periphery of the contact line is electrically conductive. A cord switch, characterized in that the cord wire is covered with a rubber material, and the contact line is composed of a braided wire capable of following expansion and contraction deformation of the conductive rubber material. 3. A pair of contact lines arranged in parallel at a distance, and the outside of a bridge conductor arranged face-to-face with a gap for conducting pressure on the contact lines are protected by a cord member having a restoring property. A cord switch which is integrally molded by an extrusion molding machine while shape-covering, in which one or a plurality of rows of cutting lines reaching near contact lines are provided in a part or the entire length of the upper surface of the cord member on the bridge conductor side,
A cord switch, wherein the contact wire is covered with a conductive rubber material, and the contact wire is formed of a braided wire capable of following expansion and contraction deformation of the conductive rubber material. 4. The cord switch according to claim 3, further comprising a support projection that protrudes toward the bridge conductor between the pair of contact lines of the cord member. 5. A pair of contact lines and an extension portion of a gap for pressure conduction are provided outside both sides of the bridge conductor, and the extension portion is provided with a support projection protruding from the contact line side to the bridge conductor side. Alternatively, the cord switch according to claim 3 or 4, which is provided with facing ridges. 6. A large number of contact wires arranged in parallel at a distance, and at least two adjacent contact wires arranged facing each other with a gap for conducting the pressure being applied on the contact wire row. In a cord switch in which a bridge conductor having a width bridging with a shape is shape-coated with a cord member having resilience and integrally molded by an extrusion molding machine, the periphery of the contact line is coated with a conductive rubber material. A cord switch, wherein the contact line is formed by a braided wire that can follow expansion and contraction deformation of the conductive rubber material.