Load-detecting device for properly detecting a load and suppressing deterioration of detection accuracy

Patent metadata

Field	Value
Publication number	US-10322649-B2
Application number	US-201615563219-A
Country	US
Kind code	B2
Filing date	Mar 30, 2016
Priority date	Mar 30, 2015
Publication date	Jun 18, 2019
Grant date	Jun 18, 2019

Abstract

The load-detecting device 1 includes a base 2 engaged with a pair of S springs 100 , and a load detection sensor unit SU that is mounted on the base 2 and includes a first electrode 52 and a second electrode 62 facing each other and being brought into contact with each other by pressing force of the seat cushion SC when a load is detected, The upper surface 47 S of the load detection sensor unit SU that is pressed by the seat cushion SC when a load is detected is located at the same height as or higher than the upper ends 101 of the respective S springs 100 , with which the base 2 is engaged, and the contact surface between the first electrode 52 and the second electrode 62 is located lower than the upper ends 101 of the respective S springs 100 , with which the base 2 is engaged.

First claim

The invention claimed is:

1. A load-detecting device configured to be pressed by a seat cushion disposed on a plurality of S springs, the load-detecting device comprising:
a base including a pair of engagement parts engaged with a pair of the S springs; and
a load detection sensor unit that is mounted on the base and includes a pair of electrodes, the electrodes facing each other and being brought into contact with each other by pressing force of the seat cushion when a load is detected, wherein
a pressed surface of the load detection sensor unit that is pressed by the seat cushion when a load is detected is located at the same height as or higher than upper ends of the respective S springs, with which the base is engaged, and
a contact surface directly between the electrodes in pair is located lower than the upper ends of the respective S springs, with which the base is engaged,
wherein the pressed surface when a load is not detected is located at the same height as or lower than upper ends of the pair of engagement parts.

2. The load-detecting device according to claim 1 , wherein the pair of electrodes is located between lower ends and the upper ends of the respective S springs, with which the base is engaged.

3. The load-detecting device according to claim 1 , wherein a mount surface on which the load detection sensor unit on the base is mounted is located at the same height as or lower than lower ends of the respective S springs, with which the base is engaged.

4. The load-detecting device according to claim 1 , wherein an average height position of a lower surface of the seat cushion is located at the same height as or higher than the pressed surface when a load is not detected.

5. The load-detecting device according to claim 1 , wherein the load detection sensor unit includes a supporting member that supports the pair of electrodes on the base.

6. The load-detecting device according to claim 1 , wherein the load detection sensor unit includes the pressed surface and a pressing member configured to press one of the electrodes in pair.

7. The load-detecting device according to claim 1 , wherein the pressed surface when a load is detected is located at a position higher than the upper ends of the respective S springs.

8. The load-detecting device according to claim 7 , wherein the pressed surface when a load is not detected is located at a position lower than upper ends of the pair of engagement parts.

9. The load-detecting device according to claim 1 , wherein the pressed surface when a load is not detected is located at a position lower than upper ends of the pair of engagement parts.

10. The load-detecting device according to claim 1 , wherein an average height position of a lower surface of the seat cushion is located higher than the pressed surface when a load is not detected.

11. A load-detecting device configured to be pressed by a seat cushion disposed on a plurality of S springs, the load-detecting device comprising:
a base including a pair of engagement parts engaged with a pair of the S springs; and
a load detection sensor unit that is mounted on the base and includes a pair of electrodes, the electrodes facing each other and being brought into contact with each other by pressing force of the seat cushion when a load is detected, wherein
a pressed surface of the load detection sensor unit that is pressed by the seat cushion when a load is detected is located at the same height as or higher than upper ends of the respective S springs, with which the base is engaged, and
a contact surface between the electrodes in pair is located lower than the upper ends of the respective S springs, with which the base is engaged,
wherein the pair of electrodes is located between lower ends and the upper ends of the respective S springs, with which the base is engaged.

12. The load-detecting device according to claim 11 , wherein a mount surface on which the load detection sensor unit on the base is mounted is located at the same height as or lower than lower ends of the respective S springs, with which the base is engaged.

13. The load-detecting device according to claim 11 , wherein the pressed surface when a load is detected is located at the same height as or lower than upper ends of the pair of engagement parts.

14. The load-detecting device according to claim 13 , wherein the pressed surface when a load is not detected is located higher than the upper ends of the pair of engagement parts.

15. The load-detecting device according to claim 11 , wherein the pressed surface when a load is not detected is located at the same height as or lower than upper ends of the pair of engagement parts.

16. The load-detecting device according to claim 15 , wherein the pressed surface when a load is not detected is located at a position lower than upper ends of the pair of engagement parts.

17. The load-detecting device according to claim 11 , wherein an average height position of a lower surface of the seat cushion is located at the same height as or higher than the pressed surface when a load is not detected.

18. The load-detecting device according to claim 11 , wherein the load detection sensor unit includes a supporting member that supports the pair of electrodes on the base.

19. The load-detecting device according to claim 11 , wherein the load detection sensor unit includes the pressed surface and a pressing member configured to press one of the electrodes in pair.

20. The load-detecting device according to claim 11 , wherein the pressed surface when a load is detected is located at a position higher than the upper ends of the respective S springs.

Assignees

• Fujikura Ltd

Inventors

• Nakazaki Shigeru
• Kikukawa Naohiro
• Kawahira Tetsuya

Classifications

• B60N2/90

  Details or parts not otherwise provided for · CPC title

• H01H2231/026

  Car · CPC title

• B60N2/64

  Back-rests {or cushions (B60N2/2222 takes precedence)} · CPC title

• H01H13/16

  adapted for operation by a part of the human body other than the hand, e.g. by foot · CPC title

• H01H35/003

  Switches operated by other part of human body than hands (push-button switches H01H13/16; slide switches H01H15/20; cord switches H01H17/10; other switches H01H19/16 and H01H21/26) · CPC title