SYSTEM FOR DETECTING DEFORMATION OF CUSHION PAD AND PRODUCTION THEREOF

• US 20170043679A1
• Filed: 04/13/2015
• Published: 02/16/2017
• Est. Priority Date: 04/15/2014
• Status: Abandoned Application

• Current Assignee: TOYO Tire & Rubber Company Limited (Toyo Tire Corporation)
• Original Assignee: TOYO Tire & Rubber Company Limited (Toyo Tire Corporation)
• Inventors: Fukuda, Takeshi, Shigeto, Junichi, Ono, Hiroaki
• Application Number:
  US15/304,401
• Publication Number:
  US 20170043679A1
• Time in Patent Office: Days
• CPC Class Codes: B60N 2/002 Seats provided with an occupancy detection means mounted therein or thereon detection means responsive to presence or absence of children B60N2/266
• CPC Class Codes: B60N 2/0027 for detecting the position of the occupant or of occupant's body part
• CPC Class Codes: B60N 2/0033 mounted on or in the foam cushion
• CPC Class Codes: B60N 2/7017 characterised by the manufacturing process; manufacturing upholstery or upholstery springs not otherwise provided for
• CPC Class Codes: B60N 2210/14 Inductive; Magnetic field
• CPC Class Codes: G01B 7/24 using change in magnetic properties

Abstract

The present invention provides a cushion pad with improved durability without feeling of a foreign object. The present invention thus provides a system for detecting a deformation of a cushion pad, comprising; the cushion pad comprising a magnetic elastomer in which magnetic filler is dispersed in an elastomer and an arithmetic average roughness (Ra) is 0.5 to 1.0 μm, and a soft polyurethane foam which is integrated with the magnetic elastomer by adhesion, and a magnetic sensor that detects a magnetic change caused by a deformation of the cushion pad. The present invention also provides a production method thereof.

Claims

1. A system for detecting a deformation of a cushion pad, comprising;

the cushion pad comprising a magnetic elastomer in which magnetic filler is dispersed in an elastomer and an arithmetic average roughness (Ra) is 0.5 to 1.0 μ

m, and a soft polyurethane foam which is integrated with the magnetic elastomer by adhesion, and

a magnetic sensor that detects a magnetic change caused by a deformation of the cushion pad.

2. The system for detecting the deformation of the cushion pad according to claim 1, wherein the magnetic elastomer has an arithmetic average roughness (Ra) of 1.0 to 8.0 μ

m.

3. The system for detecting the deformation of the cushion pad according to claim 2, wherein the magnetic elastomer has an arithmetic average roughness (Ra) of 1.0 to 5.0 μ

m.

4. The system for detecting the deformation of the cushion pad according to claim 1, wherein the magnetic elastomer has a maximum height roughness (Rz) of 5.0 to 50.0 μ

m.

5. The system for detecting the deformation of the cushion pad according to claim 4, wherein the magnetic elastomer has a maximum height roughness (Rz) of 10.0 to 50.0 μ

m.

6. The system for detecting the deformation of the cushion pad according to claim 5, wherein the magnetic elastomer has a maximum height roughness (Rz) of 15.0 to 35.0 μ

m.

7. The system for detecting the deformation of the cushion pad according to claim 1, wherein the magnetic elastomer is integrated with the soft polyurethane foam by self-adhesion.

8. The system for detecting the deformation of the cushion pad according to claim 1, wherein the magnetic elastomer has a concentration of residual OH group of 0.2 to 0.9 meq/g.

9. The system for detecting the deformation of the cushion pad according to claim 8, wherein the magnetic elastomer has a concentration of residual OH group of 0.2 to 0.85 meq/g.

10. The system for detecting the deformation of the cushion pad according to claim 1, wherein the cushion pad is applied to a seat and the deformation to be detected is caused by a sitting of a person.

11. A system for detecting a deformation of a cushion pad, comprising the cushion pad and a sensor detecting the deformation of the cushion pad, wherein the cushion pad is composed of a magnetic elastomer in which magnetic filler is dispersed in an elastomer and an arithmetic average roughness (Ra) is 0.1 to 10 μ

m, and a soft polyurethane foam which is integrated with the magnetic elastomer by adhesion, and the sensor is a magnetic sensor that detects a magnetic change caused by a deformation of the magnetic elastomer associated with the cushion pad.

12. A method for producing a system for detecting a deformation of a cushion pad, comprising the cushion pad and a sensor detecting the deformation of the cushion pad, which comprises the steps of:

a step of preparing a magnetic elastomer having an arithmetic average roughness (Ra) of 0.1 to 10 μ

m,

a step of pouring a raw material of a soft polyurethane foam into a mold for a cushion pad, and foaming to form the cushion pad,

a step of integrate the magnetic elastomer with the soft polyurethane foam raw material by adhesion, and

a step of combining the cushion pad with a magnetic sensor that detects a magnetic change caused by a deformation of the cushion pad.

13. The method according to claim 12, wherein the magnetic elastomer has an arithmetic average roughness (Ra) of 1.0 to 8.0 μ

m.

14. The method according to claim 13, wherein the magnetic elastomer has an arithmetic average roughness (Ra) of 1.0 to 5.0 μ

m.

15. The method according to claim 12, wherein the magnetic elastomer has a maximum height roughness (Rz) of 5.0 to 50.0 μ

m.

16. The method according to claim 15, wherein the magnetic elastomer has a maximum height roughness (Rz) of 10.0 to 50.0 μ

m.

17. The method according to claim 16, wherein the magnetic elastomer has a maximum height roughness (Rz) of 15.0 to 35.0 μ

m.

18. The method according to claim 12, wherein the cushion pad is applied to a seat and the deformation to be detected is caused by a person sitting.

19. A method for producing a system for detecting a deformation of a cushion pad, comprising the cushion pad and a sensor detecting the deformation of the cushion pad, which comprises the steps of:

a step of preparing a magnetic elastomer having an arithmetic average roughness (Ra) of 0.1 to 10 μ

m,

a step of disposing the magnetic elastomer in a mold for a cushion pad,

a step of pouring a raw material of a soft polyurethane foam into the mold

a step of foaming the raw material of the soft polyurethane foam to integrate the soft polyurethane foam with the magnetic elastomer by self-adhesion, thus forming a cushion pad, and

a step of combining the cushion pad with a magnetic sensor that detects a magnetic change caused by a deformation of the cushion pad.

20. The method according to claim 19, wherein the magnetic elastomer has an arithmetic average roughness (Ra) of 1.0 to 8.0 μ

m.

21. The method according to claim 20, wherein the magnetic elastomer has an arithmetic average roughness (Ra) of 1.0 to 5.0 μ

m.

22. The method according to claim 19, wherein the magnetic elastomer has a maximum height roughness (Rz) of 5.0 to 50.0 μ

m.

23. The method according to claim 22, wherein the magnetic elastomer has a maximum height roughness (Rz) of 10.0 to 50.0 μ

m.

24. The method according to claim 23, wherein the magnetic elastomer has a maximum height roughness (Rz) of 15.0 to 35.0 μ

m.

25. The method according to claim 19, wherein the magnetic elastomer has a concentration of residual OH group of 0.2 to 0.9 meq/g.

26. The method according to claim 25, wherein the magnetic elastomer has a concentration of residual OH group of 0.2 to 0.85 meq/g.

27. The method according to claim 19, wherein the cushion pad is applied to a seat and the deformation to be detected is caused by a sitting of a person.