JP2604802Y2 - Pressing direction detection type code switch - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a code switch capable of detecting a pressing direction.

[0002]

2. Description of the Related Art A linear switch of this type is disclosed in Japanese Utility Model Laid-Open No.
There is JP-A-2-100644. This publication describes a line (linear) switch configured by arranging contact wires with a pressure-conductive elastic body interposed therebetween and covering the contact wires with a cord member such as silicon rubber.

[0003]

However, this proposal has a problem that the direction of the pressing cannot be detected merely by conducting a switch between the pair of contact lines by pressing to perform a switching action.

[0004]

According to the present invention, four contact lines for detecting a pressing direction are horizontally arranged in a code member having resilience, and the contact line of the contact line array is disposed at an intermediate position between the contact line arrays. It is an object of the present invention to solve the problem by arranging a single bridging conductor having a width for switching and bridging the middle two, the right two, and the left two.

[0005]

According to the present invention, wiring is performed with the cross-linking conductor facing up,
Depending on the direction of pressing of the cord member, the direction of pressing is detected by a single conductor being pressed against and contacting two intermediate or two right or two left lines in the contact line array.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described below with reference to the drawings.

FIGS. 1 and 2 show a first embodiment of the present invention, in which a conductive wire 1 made of copper or the like is covered with a conductive rubber 2 having a rectangular cross section in which carbon powder or the like is mixed into rubber. Four contact lines 3a, 3b, 3c, 3d for direction detection are horizontally arranged at equal intervals, and are made of a conductive rubber material having the same composition as that described above with a gap above the center of the contact line row. A single conductor 4 for cross-linking is arranged in parallel. In addition, the conductor 4 is formed in a thin plate shape having a width in contact with and bridging two adjacent contact lines. They are covered with a flexible cord member 5 having resilience, such as silicone rubber or a polyurethane-based or olefin-based elastomer, in that arrangement to form an integral cord switch 6. The above-mentioned cord switch 6 can be simultaneously formed by extrusion using a known extruder (not shown).

The pressing direction detecting type code switch 6 thus configured is wired with the bridging conductor 4 facing upward, and as shown in FIGS. 2 (a), 2 (b) and 2 (c). The conductor 4 moves due to the pressing of the surface of the contact line, and the conductive line 4 is moved in contact with the middle two lines, the left two lines, and the right two lines of the contact line array to identify the middle, left, and right conductive lines. Can be detected. That is, by arranging the contact wires 3a to 3d horizontally and arranging a single conductor 4 in parallel on the middle of the contact wire row, the conductor 4 is placed in the left and right 2 Switching bridging is performed stably with the same light pressure on the two contact lines. When the contact line row is moved up and down, or particularly when there are two or more cross-linking conductors 4, one of the conductors may not cross-contact the contact line depending on the pressing direction.

The reason why the contact wires 3a to 3d are formed by inserting the conductive wire 1 of copper or the like into the conductive rubber 2 is to reduce the volume resistivity of the current and increase the cross-linked contact surface. By inserting the conductive wire 1 into the conductive rubber 2, an increase in the volume resistivity of the contact wire can be eliminated. When the conductive wire 1 has a large area such as a thin band-shaped flat knitted wire, the above-described volume resistivity can be further reduced. Further, the conductive rubber 2 covering the conductive wire 1 is useful in increasing the cross-sectional contact surface of the contact wires 3a to 3d. On the other hand, since the conductor 4 for cross-linking does not need to consider the volume resistivity only by cross-linking a very short distance between the contact lines 3a to 3d, it is formed only of the conductive rubber to improve flexibility. Thus, the contact lines are reliably bridged depending on the pressing direction.

When the direction detecting type code switch of the present invention is attached to, for example, a robot or an unmanned transport vehicle, the position direction of the contacted object is detected when it comes into contact with another object due to its progress, and conventionally, it stops immediately. The operation can be continued by reversing the place where there was no choice but to proceed in a direction where there is no contact object, and the work can be continued, so that the use as a sensor means that does not cause accident prevention or interruption is greatly expanded.

FIG. 3 shows a second embodiment of the present invention.
Six contact lines 3 as in the previous example are juxtaposed in a hook shape in end view,
This is the same as the previous example, except that conductive rubber members 4 for press-crosslinking are arranged at parallel gaps so as to face the entire surface of the three rows of contact wires, and are shaped and covered with the cord members 5. In this case, even if the conductor 4 bridges and conducts between three or more contact lines, the direction can be specified by control on the detector side as long as all the contact lines do not conduct at the same time.

[0012]

As described above, according to the present invention, four contact lines for detecting the pressing direction are horizontally arranged in the cord member, and the contact between the two contact lines is provided on the middle of the contact line array. Since a single bridging conductor with a width that allows for surface bridging is formed in a single parallel arrangement, when the cord member is pressed, the bridging conductor moves in the pressing direction and bridges between the contact lines in the pressing direction. As a result, it is possible to detect the pressing direction. The effect that the contact lines are more stable in the parallel arrangement and that the single conductor for bridging is used to surely bridge the contact lines in each pressing direction with a uniform and light touch regardless of the pressing direction. Since the cross-linking conductor has a flexible structure made of only the conductive rubber, there is an effect that the conductor flexibly corresponds to the direction and reliably bridges the contact lines in each direction when pressed.

[Brief description of the drawings]

FIG. 1 is a sectional view of a cord switch according to an embodiment of the present invention.

FIGS. 2A to 2C are cross-sectional views showing an example of operation at the time of pressing.

FIG. 3 is a sectional view showing a second embodiment of the present invention.

[Explanation of symbols]

 1 is a conductive wire 2 is a conductive rubber 3a, 3b, 3c, 3d is a contact wire 4 is a bridging conductor 5 is a cord member 6 is a cord switch

Claims (1)

(57) [Scope of request for utility model registration] 1. A contact member such as four contact lines for detecting a pressing direction is horizontally arranged in a code member having a restoring property, and two intermediate lines of the contact line line and two right lines on the middle of the contact line line. A pressing direction detecting type code switch, characterized in that a single bridging conductor having a width for switching and bridging two left sides is arranged in parallel.