PRESSURE-SENSITIVE SENSOR PRODUCTION METHOD AND PRESSURE-SENSITIVE SENSOR

• US 20120111125A1
• Filed: 11/09/2011
• Published: 05/10/2012
• Est. Priority Date: 11/10/2010
• Status: Active Grant

• Current Assignee: Hitachi Metals (Thailand) Ltd.
• Original Assignee: Hitachi Cable Limited (Proterial Ltd.)
• Inventors: AOYAMA, Takashi, OYAMA, Hiroshi, HATTORI, Akio, YAMAURA, Akira, YOSHIO, Masashi
• Granted Patent: US 8,844,384 B2
• Time in Patent Office: Days
• US Class Current: 73/862.68
• CPC Class Codes: H01C 17/06 adapted for coating resistive material on a base
• CPC Class Codes: H01C 17/28 adapted for applying terminals
• CPC Class Codes: Y10T 29/49082 Resistor making

Abstract

Two electrode wires longitudinally provided along the inner surface of an elastic insulating member having a hollow portion are exposed from said elastic insulating member, the resistive element comprising a resistor body and the resistive element'"'"'s lead wires is formed into a U-letter shape, said two electrode wires exposed from said elastic insulating member and said resistive element'"'"'s lead wires are electrically connected via one metal plate, and a portion wherein one of said two electrode wires and one of the lead wires extending from both ends of said resistor body are electrically connected and a portion wherein the other one of said two electrode wires and the other one of the lead wires extending from both ends of said resistor body are electrically connected are separated by cutting said one metal plate.

Claims

1. A pressure-sensitive sensor production method, comprising:

exposing two electrode wires longitudinally provided along the inner surface of an elastic insulating member having a hollow;

forming a resistive element into a U-letter shape, the resistive element comprising a resistor body and lead wires extending from both ends of the resistor body;

electrically connecting said two electrode wires exposed from said elastic insulating member and said lead wires extending from both ends of said resistor body via one metal plate; and

separating a portion where one of said two electrode wires and one of the lead wires extending from both ends of said resistor body are electrically connected via said metal plate and a portion where the other of said two electrode wires and the other of the lead wires extending from both ends of said resistor body are electrically connected via said metal plate by cutting said one metal plate.

2. The pressure-sensitive sensor production method according to claim 1, wherein:

said two electrode wires are provided on the inner surface of said elastic insulating member in a double-helical manner.

3. The pressure-sensitive sensor production method according to claim 1, wherein:

when connecting said electrode wires and said resistive element'"'"'s lead wires to said one metal plate, said electrode wires and said resistive element'"'"'s lead wires are connected to the top surface and the bottom surface of said one metal plate, respectively.

4. The pressure-sensitive sensor production method according to claim 2, wherein:

when connecting said electrode wires and said resistive element'"'"'s lead wires to said one metal plate, said electrode wires and said resistive element'"'"'s lead wires are connected to the top surface and the bottom surface of said one metal plate, respectively.

5. The pressure-sensitive sensor production method according to claim 1, wherein:

an interval between a portion where one of said two electrode wires and one of the lead wires extending from both ends of said resistor body are electrically connected via said metal plate and a portion where the other of said two electrode wires and the other of the lead wires extending from both ends of said resistor body are electrically connected via said metal plate is between 1 and 3 mm.

6. The pressure-sensitive sensor production method according to claim 2, wherein:

an interval between a portion where one of said two electrode wires and one of the lead wires extending from both ends of said resistor body are electrically connected via said metal plate and a portion where the other of said two electrode wires and the other of the lead wires extending from both ends of said resistor body are electrically connected via said metal plate is between 1 and 3 mm.

7. The pressure-sensitive sensor production method according to claim 1, wherein:

said electrode wire is composed of a twisted copper wire and a conductive rubber covering the outer circumference of the twisted copper wire.

8. The pressure-sensitive sensor production method according to claim 1, wherein:

said lead wire is a copper wire, and said metal terminal is a copper alloy.

9. The pressure-sensitive sensor production method according to claim 1, wherein:

said electrode wires and said lead wires are connected to said metal plate by means of resistance welding or laser welding.

10. The pressure-sensitive sensor production method according to claim 9, wherein:

when connecting said electrode wires and said lead wires to said metal plate by means of resistance welding, electrodes for resistance welding vertically sandwich said electrode wire, said lead wire, and said metal plate together to conduct resistance welding.

12. The pressure-sensitive sensor according to claim 9, wherein:

said two electrode wires are provided in a double-helical manner.

14. The pressure-sensitive sensor according to claim 12, wherein:

said electrode wires and said resistive element'"'"'s lead wires are connected to the top surface and the bottom surface of said two metal terminals respectively.

16. The pressure-sensitive sensor according to claim 12, wherein:

an interval between said two metal terminals is between 1 and 3 mm.

11. A pressure-sensitive sensor, comprising:

an elastic insulating member having a hollow portion;

two electrode wires longitudinally provided along the inner surface of said elastic insulating member;

two metal terminals to which said two electrode wires are connected respectively, said two metal terminals being separated from each other spatially; and

a resistive element having a resistor body and lead wires extending from both ends of the resistor body and connected to said two metal terminals respectively, said resistive element being formed into a U-letter shape.

13. The pressure-sensitive sensor according to, claim 11 wherein:

said electrode wires and said resistive element'"'"'s lead wires are connected to the top surface and the bottom surface of said two metal terminals respectively.

15. The pressure-sensitive sensor according to claim 11, wherein:

an interval between said two metal terminals is between 1 and 3 mm.

17. The pressure-sensitive sensor according to claim 11, wherein:

said electrode wire is composed of a twisted copper wire and a conductive rubber covering the outer circumference of the twisted copper wire.

18. The pressure-sensitive sensor according to claim 11, wherein:

said lead wire is a copper wire, and said metal terminal is a copper alloy.

19. The pressure-sensitive sensor according to claim 11, wherein:

said electrode wires and said resistive element'"'"'s lead wires are connected to said two metal terminals by means of resistance welding or laser welding.

20. The pressure-sensitive sensor according to claim 11, further comprising:

an insulating spacer being provided between said resistive element'"'"'s lead wires.