US20090261639A1 - Seat with seat sensor - Google Patents

Seat with seat sensor Download PDF

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Publication number
US20090261639A1
US20090261639A1 US12/385,480 US38548009A US2009261639A1 US 20090261639 A1 US20090261639 A1 US 20090261639A1 US 38548009 A US38548009 A US 38548009A US 2009261639 A1 US2009261639 A1 US 2009261639A1
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US
United States
Prior art keywords
cavity
seat
pad
sensor
soft material
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US12/385,480
Inventor
Yutaka Hirata
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Priority to US12/385,480 priority Critical patent/US20090261639A1/en
Publication of US20090261639A1 publication Critical patent/US20090261639A1/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C31/00—Details or accessories for chairs, beds, or the like, not provided for in other groups of this subclass, e.g. upholstery fasteners, mattress protectors, stretching devices for mattress nets
    • A47C31/12—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons
    • A47C31/126—Means, e.g. measuring means for adapting chairs, beds or mattresses to the shape or weight of persons for chairs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/002—Seats provided with an occupancy detection means mounted therein or thereon
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/70—Upholstery springs ; Upholstery
    • B60N2/7017—Upholstery springs ; Upholstery characterised by the manufacturing process; manufacturing upholstery or upholstery springs not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R21/00—Arrangements or fittings on vehicles for protecting or preventing injuries to occupants or pedestrians in case of accidents or other traffic risks
    • B60R21/01—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents
    • B60R21/015—Electrical circuits for triggering passive safety arrangements, e.g. airbags, safety belt tighteners, in case of vehicle accidents or impending vehicle accidents including means for detecting the presence or position of passengers, passenger seats or child seats, and the related safety parameters therefor, e.g. speed or timing of airbag inflation in relation to occupant position or seat belt use
    • B60R21/01512—Passenger detection systems
    • B60R21/01516—Passenger detection systems using force or pressure sensing means

Definitions

  • the present invention relates to a seat with a sheet-like sensor which detects whether an occupant is seated in the seat.
  • FIGS. 5 and 6 are sectional views showing conventional examples each of which comprises a pad 1 ′ and a sensor 2 ′ bonded on the pad 1 ′.
  • a slab 3 of about 5 mm in thickness is bonded to cover the sensor 2 ′ as shown in FIG. 5 or a frame laminate 4 of 5 mm in thickness is provided as shown in FIG. 6 .
  • Such a conventional seat in which the sensor 2 ′ is bonded and the slab 3 or the frame laminate 4 is provided to cover the sensor 2 ′ has disadvantages in that many laminating steps are required and cost is increased due to the laminating.
  • a seat with a seat sensor of the present invention comprises a soft pad and a pressure sensitive sheet-like sensor for detecting a human body seated on the pad wherein the sensor is disposed inside the pad.
  • the aforementioned seat with the seat sensor can substantially completely eliminate bad touch due to the presence of the sensor and also eliminate the necessity of providing a slab and a laminate for covering the sensor, thereby allowing easy manufacture and reducing the manufacturing cost.
  • the pad is provided with a slit for the sensor formed from a side (any one of front, rear, right, and left sides) toward the center of the pad and the sensor is inserted into the slit.
  • the pad is provided with a cavity formed upward from the bottom of the pad, a soft member is inserted into the cavity, and the sensor is disposed between the top surface of the soft member and the ceiling of the cavity.
  • the cavity may be formed in such a manner that the lower end thereof is narrower, thereby preventing the soft member from coming off.
  • FIGS. 1 a, 1 b and 1 c are sectional views showing a seat with a seat sensor according to an embodiment
  • FIGS. 2 a and 2 b are sectional views each showing a seat with a seat sensor according to another embodiment
  • FIGS. 3 a and 3 b are sectional views showing a seat with a seat sensor according to further different embodiment
  • FIG. 4 is a structural view of a seat with a seat sensor according to still further different embodiment
  • FIG. 5 is a sectional view showing a conventional example
  • FIG. 6 is a sectional view showing another conventional example
  • FIG. 7 is a plane view of a seat with a seat sensor according to another embodiment.
  • FIG. 8 is a sectional view taken along the line VIII-VIII of FIG. 7 .
  • FIGS. 1 a, 1 b and 1 c are sectional views showing a seat with a seat sensor according to an embodiment of the present invention
  • FIG. 1 a is a sectional view taken in the back-and-forth direction
  • FIG. 1 b is a sectional view taken along the line 1 b - 1 b of FIG. 1 a
  • FIG. 1 c is an exploded structural view.
  • a pad 1 is provided with a cavity 5 which is formed in the bottom to extend upward and in which a sensor 2 is attached to the ceiling thereof.
  • Filled in the cavity 5 is a slab 6 made of the same soft material as the pad 1 (molded soft polyurethane foam may be used).
  • the sensor 2 may be bonded onto the ceiling of the cavity 5 with an adhesive agent or adhesive tape. Alternatively, the sensor may be bonded on the top of the slab 6 .
  • FIG. 1 c it is preferable that the sensor 2 is previously bonded to the ceiling of the cavity 5 and a cable 2 a connected with the sensor 2 is extended to the rear end of the pad 1 in such a manner that a terminal 2 b disposed at an end of the cable projects from the rear end of the pad 1 .
  • the cavity 5 is formed in a taper configuration in such a manner that the lower portion is narrower so that the slab 6 inserted into the cavity 5 is held in the cavity 5 and is prevented from coming off.
  • FIGS. 2 a and 2 b show other embodiments of the present invention.
  • the cavity 5 is provided with a protrusion 5 a around the opening thereof so that the lower periphery of the slab 6 is engaged with the protrusion 5 a, thereby preventing the slab 6 from coming off.
  • a used slab 6 is slightly larger than the cavity 5 so that the slab 6 is pressed into the cavity 5 in the elastically compressed state, thereby preventing the slab 6 from coming off.
  • the senor 2 has substantially the same size as the area of the ceiling of the cavity 5 in FIGS. 1 a, 1 b, 1 c, 2 a and 2 b , it should be understood that the size of the sensor 2 may be smaller than the ceiling of the cavity 5 as shown in FIGS. 7 and 8 .
  • FIG. 3 a is a sectional view of a seat with a seat sensor according to a further different embodiment of the present invention and FIG. 3 b is an exploded view thereof.
  • the pad 1 is provided with a slit 7 extending forward from the rear end, into which the sensor 2 is inserted.
  • the slit 7 is provided in a substantially horizontal direction so that the sensor 2 never comes off the slit 7 even without closing the opening of the slit 7 .
  • a sheet-like slab may be pressed into the slit 7 to prevent the sensor 2 from coming off.
  • the pad 1 may be entirely wrapped with a cover 8 as shown in FIG. 4 .
  • examples of material of the pad 1 include polyurethane foam and thermoplastics resin fibers (e.g. polypropylene, polyethylene, and polystyrene), just like the conventional example.
  • examples of material of the cover 8 shown in FIG. 4 include leather, polyvinyl chloride, moquette, and the like.
  • Employed as the sensor 2 may be a pressure sensitive sensor wherein the electrical resistance is changed by pressure or a strain gage, just like the conventional example.
  • the slit 7 is formed to extend forward from the rear end of the pad 1 in the embodiment shown in FIGS. 3 a and 3 b, the slit 7 may be formed to extend from the front end or side toward the center of the pad 1 in case that the cover 8 wraps the pad 1 as shown in FIG. 4 .
  • the sensor is disposed inside the pad so that the occupant never feel bad touch even when the occupant sits down on the pad above the sensor.
  • This structure can eliminate the necessity of providing a slab or a laminate on the top of the pad, thereby facilitating the manufacture of the seat with seat sensor and thus extremely reducing the manufacturing cost.

Abstract

A seat with a seat sensor includes a soft pad having a cavity extending upwardly from a bottom surface thereof, a pressure sensitive sheet sensor for sensing a person sitting on the pad, and a soft material disposed in the cavity such that the soft material is prevented from coming off from the cavity. The sheet sensor is disposed on an upper portion of the soft material.

Description

    FIELD OF THE INVENTION
  • The present invention relates to a seat with a sheet-like sensor which detects whether an occupant is seated in the seat.
    • DESCRIPTION OF PRIOR ART
  • A sensor for preventing malfunction of a passenger air bag is known, which is provided on the upper surface of a vehicle seat cushion. FIGS. 5 and 6 are sectional views showing conventional examples each of which comprises a pad 1′ and a sensor 2′ bonded on the pad 1′. For eliminating bad touch due to the presence of the sensor, a slab 3 of about 5 mm in thickness is bonded to cover the sensor 2′ as shown in FIG. 5 or a frame laminate 4 of 5 mm in thickness is provided as shown in FIG. 6.
  • Such a conventional seat in which the sensor 2′ is bonded and the slab 3 or the frame laminate 4 is provided to cover the sensor 2′ has disadvantages in that many laminating steps are required and cost is increased due to the laminating.
    • OBJECT AND SUMMARY OF THE INVENTION
  • It is an object of the present invention to solve the above disadvantages and to provide a seat with a seat sensor which allows easy manufacture and substantially completely eliminates the bad touch due to the presence of the sensor.
  • A seat with a seat sensor of the present invention comprises a soft pad and a pressure sensitive sheet-like sensor for detecting a human body seated on the pad wherein the sensor is disposed inside the pad.
  • Since the sensor is disposed inside the pad, the aforementioned seat with the seat sensor can substantially completely eliminate bad touch due to the presence of the sensor and also eliminate the necessity of providing a slab and a laminate for covering the sensor, thereby allowing easy manufacture and reducing the manufacturing cost.
  • In one embodiment of the present invention, the pad is provided with a slit for the sensor formed from a side (any one of front, rear, right, and left sides) toward the center of the pad and the sensor is inserted into the slit.
  • In another embodiment of the present invention, the pad is provided with a cavity formed upward from the bottom of the pad, a soft member is inserted into the cavity, and the sensor is disposed between the top surface of the soft member and the ceiling of the cavity. In this case, the cavity may be formed in such a manner that the lower end thereof is narrower, thereby preventing the soft member from coming off.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIGS. 1 a, 1 b and 1 c are sectional views showing a seat with a seat sensor according to an embodiment;
  • FIGS. 2 a and 2 b are sectional views each showing a seat with a seat sensor according to another embodiment;
  • FIGS. 3 a and 3 b are sectional views showing a seat with a seat sensor according to further different embodiment;
  • FIG. 4 is a structural view of a seat with a seat sensor according to still further different embodiment;
  • FIG. 5 is a sectional view showing a conventional example;
  • FIG. 6 is a sectional view showing another conventional example;
  • FIG. 7 is a plane view of a seat with a seat sensor according to another embodiment; and
  • FIG. 8 is a sectional view taken along the line VIII-VIII of FIG. 7.
    •  DESCRIPTION OF PREFERRED EMBODIMENTS
  • Hereinafter, embodiments of the present invention will be described with reference to the attached drawings.
  • FIGS. 1 a, 1 b and 1 c are sectional views showing a seat with a seat sensor according to an embodiment of the present invention, FIG. 1 a is a sectional view taken in the back-and-forth direction, FIG. 1 b is a sectional view taken along the line 1 b-1 b of FIG. 1 a, and FIG. 1 c is an exploded structural view.
  • In this embodiment, a pad 1 is provided with a cavity 5 which is formed in the bottom to extend upward and in which a sensor 2 is attached to the ceiling thereof. Filled in the cavity 5 is a slab 6 made of the same soft material as the pad 1 (molded soft polyurethane foam may be used). The sensor 2 may be bonded onto the ceiling of the cavity 5 with an adhesive agent or adhesive tape. Alternatively, the sensor may be bonded on the top of the slab 6. As shown in FIG. 1 c, it is preferable that the sensor 2 is previously bonded to the ceiling of the cavity 5 and a cable 2 a connected with the sensor 2 is extended to the rear end of the pad 1 in such a manner that a terminal 2 b disposed at an end of the cable projects from the rear end of the pad 1.
  • In this embodiment, the cavity 5 is formed in a taper configuration in such a manner that the lower portion is narrower so that the slab 6 inserted into the cavity 5 is held in the cavity 5 and is prevented from coming off.
  • FIGS. 2 a and 2 b show other embodiments of the present invention. In FIG. 2 a, the cavity 5 is provided with a protrusion 5 a around the opening thereof so that the lower periphery of the slab 6 is engaged with the protrusion 5 a, thereby preventing the slab 6 from coming off. In FIG. 2 b, a used slab 6 is slightly larger than the cavity 5 so that the slab 6 is pressed into the cavity 5 in the elastically compressed state, thereby preventing the slab 6 from coming off.
  • Though the sensor 2 has substantially the same size as the area of the ceiling of the cavity 5 in FIGS. 1 a, 1 b, 1 c, 2 a and 2 b, it should be understood that the size of the sensor 2 may be smaller than the ceiling of the cavity 5 as shown in FIGS. 7 and 8.
  • FIG. 3 a is a sectional view of a seat with a seat sensor according to a further different embodiment of the present invention and FIG. 3 b is an exploded view thereof. In this embodiment, the pad 1 is provided with a slit 7 extending forward from the rear end, into which the sensor 2 is inserted. In this case, the slit 7 is provided in a substantially horizontal direction so that the sensor 2 never comes off the slit 7 even without closing the opening of the slit 7. However, a sheet-like slab may be pressed into the slit 7 to prevent the sensor 2 from coming off.
  • In the embodiment shown in FIGS. 3 a and 3 b, the pad 1 may be entirely wrapped with a cover 8 as shown in FIG. 4.
  • According to the present invention, examples of material of the pad 1 include polyurethane foam and thermoplastics resin fibers (e.g. polypropylene, polyethylene, and polystyrene), just like the conventional example. Examples of material of the cover 8 shown in FIG. 4 include leather, polyvinyl chloride, moquette, and the like. Employed as the sensor 2 may be a pressure sensitive sensor wherein the electrical resistance is changed by pressure or a strain gage, just like the conventional example.
  • Though the slit 7 is formed to extend forward from the rear end of the pad 1 in the embodiment shown in FIGS. 3 a and 3 b, the slit 7 may be formed to extend from the front end or side toward the center of the pad 1 in case that the cover 8 wraps the pad 1 as shown in FIG. 4.
  • As mentioned above, in the seat with the seat sensor according to the present invention, the sensor is disposed inside the pad so that the occupant never feel bad touch even when the occupant sits down on the pad above the sensor. This structure can eliminate the necessity of providing a slab or a laminate on the top of the pad, thereby facilitating the manufacture of the seat with seat sensor and thus extremely reducing the manufacturing cost.

Claims (12)

1-2. (canceled)
3. A seat with a seat sensor, comprising:
a soft pad having a cavity extending upwardly from a bottom surface thereof,
a pressure sensitive sheet sensor for sensing a person sitting on the pad, and
a soft material disposed in the cavity such that the soft material is prevented from coming off from the cavity, said sheet sensor being disposed on an upper portion of the soft material.
4. A seat with a seat sensor according to claim 3, wherein said cavity has a lower portion narrower than an upper portion so that the soft material is held in the cavity.
5. A seat with a seat sensor according to claim 3, wherein a protrusion is formed around the cavity so that the soft material is prevented from coming off from the cavity.
6. A seat with a seat sensor according to claim 5, wherein the protrusion is formed around an opening of the cavity.
7. A seat with a seat sensor according to claim 3, wherein said soft material is held in the cavity such that the soft material is elastically pressed, to thereby prevent the soft material from coming off from the cavity.
8. A soft pad for a seat with a seat sensor to which a pressure sensitive sheet sensor for sensing a person sitting on the pad is installed, said soft pad having a slit for inserting the sheet sensor, said slit extending from a side surface of the pad to a center of the pad.
9. A soft pad for a seat with a seat sensor to which a pressure sensitive sheet sensor for sensing a person sitting on the pad is installed, said soft pad having a cavity extending upwardly from a bottom surface of the pad for inserting the sheet sensor, and a soft material inserted into the cavity such that the soft material is prevented from coming off from the cavity and the seat sensor is disposed on the soft material.
10. A soft pad according to claim 9, wherein said cavity has a lower portion narrower than an upper portion so that the soft material is prevented from coming off from the cavity.
11. A soft pad according to claim 9, wherein a protrusion is formed around the cavity so that the soft material is prevented from coming off from the cavity.
12. A soft pad according to claim 11, wherein the protrusion is formed around an opening of the cavity.
13. A soft pad according to claim 11, wherein said soft material is held in the cavity such that the soft material is elastically pressed, to thereby prevent the soft material from coming off from the cavity.
US12/385,480 1997-07-24 2009-04-09 Seat with seat sensor Abandoned US20090261639A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/385,480 US20090261639A1 (en) 1997-07-24 2009-04-09 Seat with seat sensor

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP9198413A JPH1134710A (en) 1997-07-24 1997-07-24 Seat with seating sensor
JPH09-198413 1997-07-24
US09/116,906 US6428095B1 (en) 1997-07-24 1998-07-17 Seat with seat sensor
US79581004A 2004-03-09 2004-03-09
US12/385,480 US20090261639A1 (en) 1997-07-24 2009-04-09 Seat with seat sensor

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
US79581004A Division 1997-07-24 2004-03-09

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US20090261639A1 true US20090261639A1 (en) 2009-10-22

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US09/116,906 Expired - Lifetime US6428095B1 (en) 1997-07-24 1998-07-17 Seat with seat sensor
US12/385,480 Abandoned US20090261639A1 (en) 1997-07-24 2009-04-09 Seat with seat sensor

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US09/116,906 Expired - Lifetime US6428095B1 (en) 1997-07-24 1998-07-17 Seat with seat sensor

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US (2) US6428095B1 (en)
EP (2) EP1251027B1 (en)
JP (1) JPH1134710A (en)
DE (2) DE69812241T2 (en)

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EP1251027A3 (en) 2003-05-21
EP0893300B1 (en) 2003-03-19
EP0893300A3 (en) 1999-08-11
DE69839454D1 (en) 2008-06-19
JPH1134710A (en) 1999-02-09
EP0893300A2 (en) 1999-01-27
EP1251027A2 (en) 2002-10-23
DE69812241D1 (en) 2003-04-24
DE69812241T2 (en) 2003-12-11
EP1251027B1 (en) 2008-05-07
US6428095B1 (en) 2002-08-06

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