JP2012086780A - Seat device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat device that can appropriately detect a load by a person who takes the seat through a seating sensor laid on a seat pan.SOLUTION: The seat device 9 includes a seat pan 92, a cushion pad 93 laid on the seat pan 92, and a seating sensor 1 having at least one pressure-sensitive switch 40A to 40F and laid between the seat pan 92 and the cushion pad 93. The seat pan 92 has a hole 94A formed therein, and the seating sensor 1 is laid in such a manner that the pressure-sensitive switch 40A to 40F adjoins the hole 94A of the seat pan 92.

Description

  The present invention relates to a seat apparatus, and more particularly to a seat apparatus that can appropriately detect a person's seating by a seating sensor disposed on a seat pan.

  Currently, as one of safety systems in vehicles, an alarm system that detects the wearing of a seat belt when a person gets on and issues a warning when the seat belt is not worn is put into practical use. Such an alarm system detects a person's seating and issues a warning if the seat belt is not worn when the person is seated. In order to detect the seating of the person, there is a case where a seating sensor is used which is disposed in a seating portion in the seat and detects a load caused by the seating of the person.

  Patent Document 1 listed below describes a seat device including such a seating sensor. The seating sensor of the seat device described in Patent Document 1 has a plurality of on / off type pressure sensitive switches. And this seating sensor is arrange | positioned between the skin of a seat and a cushion pad, and when a pressure is applied to each pressure sensitive switch, a pressure sensitive switch will be in an ON state and will detect seating of a person.

JP 09-315199 A

  FIG. 1 is a diagram illustrating a distribution of a load that a cushion pad of a seat receives from a person through an epidermis in a state where a person is normally seated on the seat. In FIG. 1, a darker portion indicates a state where the cushion pad receives a higher load. Only the epidermis is interposed between the person and the cushion pad. Therefore, as shown in FIG. 1, on the cushion pad, the largest load is applied to the portion where the human buttocks are located. And the seating sensor of the said patent document 1 can detect a person's seating by arrange | positioning a pressure sensitive switch in the part in which the person's buttocks are located on a cushion pad.

  However, in the seat device described in Patent Document 1, since the seating sensor is disposed between the epidermis and the cushion pad as described above, a person sitting on the seat can feel the cushion pad through the epidermis. A different feeling may be received from the seating sensor, and the seating portion of the seat may feel uncomfortable.

  Accordingly, an object of the present invention is to provide a seat device that can appropriately detect a person's seating while preventing a sense of incongruity due to a seating sensor.

  The present inventor has intensively studied a method for preventing the uncomfortable feeling caused by the seating sensor as described above. As a result, in order to prevent a sense of incongruity due to the seating sensor, the seating sensor is disposed on the seat pan disposed under the cushion pad of the seat and supporting the cushion pad. It came to the conclusion that it should just be the structure pinched | interposed by. In the seat in which the seating sensor is arranged in this way, the cushion pad is interposed between the seated person and the seating sensor, so that it is possible to prevent a sense of incongruity due to the seating sensor during seating.

  In view of this, the present inventor has considered arranging the seating sensor on the seat pan. However, when the load applied to the seat by the person sitting is transmitted to the seat pan via the cushion pad, the present inventor tends to disperse the load widely on the seat pan. It has been found that a large pressing force is received from the cushion pad at a location deviated from the portion where is located. Therefore, it has been found that when the seating sensor is arranged on the seat pan, it is difficult to properly transmit the load applied to the cushion pad by the seating to the seating sensor. Therefore, the present inventor has conducted further intensive studies and has come to carry out the present invention.

  The seat device of the present invention has a seat pan, a cushion pad disposed on the seat pan, and at least one pressure-sensitive switch, and a seating sensor disposed between the seat pan and the cushion pad. The seat pan is formed with a hole, and the seating sensor is arranged so that the pressure-sensitive switch is adjacent to the hole of the seat pan.

  According to such a seat device, since the seating sensor is disposed between the seat pan and the cushion pad, it is possible to prevent a seated person from receiving a feel different from the feel of the cushion pad by the seating sensor. it can. And when the hole is formed in the seat pan, the present inventor, when a load is applied to the cushion pad by sitting, the pressing force received by the seat pan from the cushion pad is different from that in the region adjacent to the hole. I found it relatively stronger than the part. Therefore, according to such a seat device, when the pressure sensitive switch is arranged so as to be adjacent to the hole formed in the seat pan, when the cushion pad is loaded by the seating, the cushion pad switches the pressure sensitive switch. Press properly. For this reason, a person's seating can be detected appropriately.

  In the seat device, the seating sensor includes a pair of flexible insulating sheets, and a sheet-like spacer interposed between the pair of insulating sheets and having at least one opening formed therein. The pressure sensitive switch may be provided on each surface of the pair of insulating sheets and may have a pair of electrodes facing each other through the opening.

  Further, in the seat device, the seating sensor is provided on a side opposite to the spacer side in at least one of the pair of insulating sheets, and further includes a cushion member that covers at least the opening via the insulating sheet, The seating sensor is preferably arranged so that the cushion member is sandwiched between the seat pan and the insulating sheet.

  According to such a seat device, when a pressing force is applied to the seating sensor from the seat pan and the cushion pad due to the seating of the person, the cushion member sandwiched between the seat pan and the insulating sheet is deformed to be crushed, The insulating force on the sheet pan side is pressed by the elastic force. At this time, the cushion member presses the insulating sheet so that the insulating sheet on the seat pan side enters the opening of the spacer. On the other hand, the insulating sheet on the cushion pad side is bent so as to enter the opening of the spacer by the elastic force of the cushion pad. Thus, since the pair of insulating sheets bend, the pair of electrodes facing each other can be brought into contact with each other through the opening of the spacer, so that the pressure-sensitive switch can be appropriately turned on, and the seating is properly detected. be able to.

  Further, in the seat device, the hole of the seat pan is formed to overlap a center line that is parallel to the front-rear direction of the cushion pad and passes through the center in the width direction, and the seating sensor includes a plurality of the pressure sensitive switches. It is preferable that at least one of the pressure sensitive switches is arranged on the left side and the right side with respect to the center line of the cushion pad.

  A person sitting on the seat usually sits at the center of the cushion pad in the width direction. On the other hand, the luggage is not always placed at the center of the cushion pad in the width direction. Therefore, according to such a seat device, since the pressure sensitive switch is arranged on the left side and the right side with respect to the center line passing through the center in the width direction of the cushion pad, the seating of the person is properly detected, and the luggage Can be prevented from being erroneously detected.

  Further, in the seat device, at least one of the pressure-sensitive switches provided on the left side and at least one of the pressure-sensitive switches provided on the right side are positioned symmetrically with respect to each other with respect to the center line. It is preferable to be provided.

  According to such a seat device, it is possible to appropriately detect seating of a person more accurately and suppress erroneous detection of a load.

  In the seat device, it is preferable that an AND circuit is formed by the pressure-sensitive switch disposed on the left side and the pressure-sensitive switch disposed on the right side.

  According to such a seating sensor, it is possible to suppress erroneous detection by the seating sensor when a load is applied to the cushion pad by being placed in the seat and being biased in the width direction of the seat.

  In the seat device, a plurality of the pressure sensitive switches are arranged on the left side and the right side of the seat pan, the plurality of pressure sensitive switches arranged on the left side, and the right side of the seat pan. The plurality of pressure sensitive switches preferably each form an OR circuit.

  According to such a seating sensor, the detection sensitivity of the seating sensor is improved, and the seating can be detected appropriately.

  In the seat device, it is preferable that the seating sensor further includes a wiring connected to the pressure sensitive switch, and the wiring is disposed at a position not overlapping the hole of the seat pan.

  When a load is applied to the cushion pad, the cushion pad is deformed so that a part of the cushion pad enters the hole of the seat pan by its own elastic force. Therefore, when the wiring of the seating sensor overlaps the hole of the seat pan, the wiring may be deformed and damaged by being pushed out of the hole by the cushion pad at the time of sitting. However, according to such a seat device, since the wiring is arranged at a position that does not overlap the hole, it is possible to prevent the wiring from being damaged due to the deformation of the cushion pad.

  Furthermore, in the seat device, the insulating sheet is preferably disposed at a position that does not overlap the hole of the seat pan.

  According to such a seat device, even if a load is applied to the cushion pad and the cushion pad is deformed as described above, the insulating sheet can be prevented from being damaged.

  As described above, according to the present invention, there is provided a seat device that can appropriately detect a person's seating by the seating sensor disposed on the seat pan.

It is a figure which shows distribution of the load which the cushion pad of a seat receives from a person through an epidermis in the state where the person seated normally on the seat. It is a top view which shows the seating sensor used for the seat apparatus of 1st Embodiment of this invention. FIG. 3 is a plan view showing a first electrode sheet shown in FIG. 2. It is a top view which shows the 2nd electrode sheet shown in FIG. It is a top view which shows a spacer. It is a figure which shows the mode of the cross section in the VV line | wire of FIG. It is a circuit diagram which shows the circuit structure of the seating sensor shown in FIG. 2 with an equivalent circuit. It is a figure which shows the mode of the seat apparatus which concerns on 1st Embodiment of this invention. It is a conceptual diagram which shows distribution of the load which a seat pan receives from a person via a skin and a cushion pad in the state which the person seated normally on the seat apparatus. FIG. 10 is a diagram illustrating a distribution of a load received by a seat pan when a person is seated on the XX line in FIG. 9. It is a figure which shows a mode that a pressure-sensitive switch turns on in the state by which the seating sensor is arrange | positioned in a seat like FIG. 8 from the same viewpoint as FIG. It is a top view which shows the seating sensor used for the seat apparatus which concerns on 2nd Embodiment of this invention. It is a top view which shows the 1st electrode sheet shown in FIG. It is a top view which shows the 2nd electrode sheet shown in FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a preferred embodiment of a seating sensor according to the present invention will be described in detail with reference to the drawings.

(First embodiment)
FIG. 2 is a plan view showing a seating sensor used in the seat device according to the first embodiment of the present invention. As shown in FIG. 2, the seating sensor 1 includes a first electrode sheet 10, a second electrode sheet 20 stacked on the first electrode sheet 10, and a spacer sandwiched between the first electrode sheet 10 and the second electrode sheet 20. And the cushion member arrange | positioned on the opposite side to the spacer of the 1st electrode sheet 10 and the 2nd electrode sheet 20 is provided as a main component.

  FIG. 3 is a plan view showing the first electrode sheet 10 shown in FIG. As shown in FIG. 3, the first electrode sheet 10 includes a flexible film-shaped first insulating sheet 11, first electrodes 14 </ b> A to 14 </ b> F formed on the surface of the first insulating sheet 11, and a first electrode sheet 10. Terminals 42A and 42B formed on the surface of the insulating sheet 11 are provided as main components.

  The first insulating sheet 11 extends outside the arc portion 11A from the arc portion 11A formed in an arc shape and a substantially middle point of the arc portion 11A so as to partially surround a circle of a predetermined size. , It is composed of a belt-shaped tail portion 11B having one end connected to the arc portion 11A and the other end being a free end. A line passing through the center of the tail part 11B and along the longitudinal direction of the tail part 11B passes through the center of the circle surrounded by the arc part 11A. The first insulating sheet 11 has a line-symmetric shape with reference to a line passing through the center of the tail part 11B and along the longitudinal direction of the tail part 11B.

  The first electrodes 14A to 14F have a substantially circular shape, and the first electrodes 14A to 14F are provided on the arc portion 11A. Specifically, the first electrodes 14A to 14C are provided on the left side of the connection point with the tail part 11B on the surface of the arc part 11A. The first electrode 14C is provided at a predetermined interval from one edge of the arc portion 11A, and the first electrode 14B is provided at a predetermined distance from the first electrode 14C. Furthermore, the first electrode 14A is formed at a predetermined distance from the first electrode 14B. Accordingly, the first electrodes 14A to 14C are provided in the order of the first electrode 14C, the first electrode 14B, and the first electrode 14A in order from one end side of the arc portion 11A, and the first electrode 14A is connected to the arc portion 11A. It is provided at a location closest to the connection point with the tail part 11B.

  Furthermore, the first electrode 14A and the first electrode 14B are connected to the arc-shaped first wiring 16A provided between the first electrode 14A and the first electrode 14B on the surface of the arc portion 11A, The first electrode 14B and the first electrode 14C are connected to an arc-shaped first wiring 16B provided between the first electrode 14B and the first electrode 14C on the surface of the arc portion 11A.

  Furthermore, the first electrode 14A is connected to the arc-shaped first wiring 16E provided from the first electrode 14A to the connection point between the arc portion 11A and the tail portion 11B on the surface of the arc portion 11A. The first wiring 16E is connected to the first wiring 16G extending along the longitudinal direction of the tail part 11B at the connection point between the arc part 11A and the tail part 11B.

  On the other hand, the first electrodes 14D to 14F are provided on the right side of the connection point with the tail part 11B on the surface of the arc part 11A. Specifically, the first electrode 14F is provided at a predetermined interval from the other end of the arc portion 11A in the same manner as the first electrode 14C, and the first electrode 14E is a first electrode. 14F is provided at a predetermined distance, and the first electrode 14D is formed at a predetermined distance from the first electrode 14E. Thus, the first electrodes 14A to 14C are provided in the order of the first electrode 14F, the first electrode 14E, and the first electrode 14D in order from the other end side of the arc portion 11A, and the first electrode 14D is connected to the arc portion 11A. It is provided at a location closest to the connection point with the tail part 11B.

  Furthermore, the first electrode 14D and the first electrode 14E are connected to the arc-shaped first wiring 16C provided between the first electrode 14D and the first electrode 14E on the surface of the arc portion 11A. The first electrode 14E and the first electrode 14F are connected to an arc-shaped first wiring 16D provided between the first electrode 14E and the first electrode 14F on the surface of the arc portion 11A.

  Furthermore, the first electrode 14D is connected to the arc-shaped first wiring 16F provided from the first electrode 14D to the connection point between the arc part 11A and the tail part 11B on the surface of the arc part 11A. The first wiring 16F is connected to the first wiring 16H extending along the longitudinal direction of the tail part 11B at the connection point between the arc part 11A and the tail part 11B.

  Note that the first electrodes 14A to 14C and the first electrodes 14D to 14F provided on the surface of the first insulating sheet 11 pass through the center of the tail part 11B and the longitudinal direction of the tail part 11B. As a reference, they are provided so as to be line-symmetric with each other.

  Further, the terminals 42A and 42B have a substantially square shape, and the terminals 42A and 42B are located at a predetermined distance from the edge on the free end side on the surface of the tail part 11B in the longitudinal direction of the tail part 11B. They are juxtaposed along the vertical direction. The terminal 42A is connected to the other end of the first wiring 16G whose one end is connected to the first wiring 16E as described above, and the terminal 42B is connected to the first wiring 16F as described above. The other end of the first wiring 16H is connected.

  Thus, the first electrodes 14A to 14C and the terminal 42A are electrically connected by the first wirings 16A, 16B, 16E, and 16G. Similarly, the first electrodes 14D to 14F and the terminal 42B are electrically connected by the first wirings 16C, 16D, 16F, and 16H.

  FIG. 4 is a plan view showing the second electrode sheet shown in FIG. As shown in FIG. 4, the second electrode sheet 20 mainly includes a flexible film-like second insulating sheet 21 and second electrodes 24 </ b> A to 24 </ b> F formed on the surface of the second insulating sheet 21. Have as an element.

  The second insulating sheet 21 has the same shape and size as the arc portion 11A of the first insulating sheet 11 and the tail portion 11B of the first insulating sheet 11 having the same width and a short length. And a tail part 21B. The arc portion 21A is formed to completely overlap the arc portion 11A in the first insulating sheet 11 when the first electrode sheet 10 and the second electrode sheet 20 are overlapped. Further, the tail portion 21B of the second insulating sheet 21 overlaps the tail portion 11B of the first insulating sheet 11 when the first electrode sheet 10 and the second electrode sheet 20 are overlapped, and the first electrode sheet 10 The terminals 42A and 42B are connected to the arc portion 21A so as to be exposed. In the present embodiment, the second insulating sheet 21 and the first insulating sheet 11 have the same flexibility, and are configured to be bent in the same manner when the same force is applied.

  The second electrodes 24A to 24F have the same shape and size as the first electrodes 14A to 14F. Furthermore, the second electrodes 24 </ b> A to 24 </ b> F are formed on the surface of the second insulating sheet 21 on the first electrode sheet 10 side when the second electrode sheet 20 is overlapped with the first electrode sheet 10. 14F is provided at a position completely overlapping with 14F.

  Furthermore, the second electrode 24A and the second electrode 24B are connected to an arc-shaped second wiring 26A provided between the second electrode 24A and the second electrode 24B on the surface of the arc portion 21A, The electrode 24B and the second electrode 24C are connected to an arc-shaped second wiring 26B provided between the second electrode 24B and the second electrode 24C on the surface of the arc portion 21A. Similarly, the second electrode 24D and the second electrode 24E are connected to an arc-shaped second wiring 26C provided between the second electrode 24D and the second electrode 24E on the surface of the arc portion 21A. The electrode 24E and the second electrode 24F are connected to an arc-shaped second wiring 26D provided between the second electrode 24E and the second electrode 24F on the surface of the arc portion 21A.

  Further, the second electrode 24B and the second electrode 24E are respectively connected to the second wiring 26E provided on the surface of the arc portion 21A.

  Thus, the second electrodes 24A to 24F are electrically connected by the second wirings 26A to 26E.

  FIG. 5 is a plan view showing a spacer sandwiched between the first electrode sheet 10 and the second electrode sheet 20. The spacer 30 is composed of a flexible insulating sheet 31. As shown in FIG. 5, the spacer 30 has the same outer shape as the second electrode sheet 20.

  In addition, openings 34A to 34F having the same size are formed in the spacer 30. The openings 34 </ b> A to 34 </ b> F have a substantially circular periphery, and have a diameter slightly smaller than that of the first electrodes 14 </ b> A to 14 </ b> F. The openings 34 </ b> A to 34 </ b> F overlap the outer shapes of the first electrodes 14 </ b> A to 14 </ b> F when the spacer 30 is overlapped with the first electrode sheet 10 and the spacer 30 is viewed along the direction perpendicular to the spacer 30. The openings 34A to 34F are formed at positions where they can be accommodated.

  Further, the spacer 30 is formed with slits 36A to 36E which are slits for venting air and spatially connect the openings 34A to 34F. Specifically, the opening 34A and the opening 34B are connected to the slit 36A, the opening 34B and the opening 34C are connected to the slit 36B, and the opening 34D and the opening 34E are connected to the slit 36C. The opening 34E and the opening 34F are connected to the slit 36D, and the opening 34B and the opening 34E are connected to the slit 36E. Further, the spacer 30 is formed with a gas outlet 35 and a slit 36F connecting the gas outlet 35 and the slit 36E. Accordingly, the openings 34A to 34F are spatially connected to the outside of the spacer 30 via the gas outlet 35 and the slits 36A to 36F.

  Note that an adhesive (not shown) for bonding the first electrode sheet 10 and the second electrode sheet 20 is applied to both surfaces of the spacer 30.

  FIG. 6 is a diagram illustrating a cross-sectional state along the line VV illustrated in FIG. 2. As shown in FIGS. 2 and 6, the seating sensor 1 has the first electrode sheet 10 and the second electrode sheet 20 overlapped with the spacer 30 interposed therebetween as described above, and is applied to both surfaces of the spacer 30. Are fixed and integrated with each other by the adhesive.

  Thus, when the 1st electrode sheet 10, the spacer 30, and the 2nd electrode sheet 20 are integrated, and it sees from the direction perpendicular | vertical with respect to the seating sensor 1, the 1st of the 1st electrode sheet 10 is shown. The electrode 14A and the second electrode 24A of the second electrode sheet 20 are completely overlapped, and the opening 34A formed in the spacer 30 is within the outer periphery of the first electrode 14A and the second electrode 24A. . Then, the first electrode 14A and the second electrode 24A are opposed to each other at a predetermined interval by a spacer 30 as shown in FIG. Thus, the pressure-sensitive switch 40A having the first and second insulating sheets 11 and 21, the spacer 30 in which the opening 34A is formed, and the pair of electrodes 14A and 24A facing each other through the opening 34A is configured. Has been. Similarly, the other first electrodes 14B to 14F and the other second electrodes 24B to 24F face each other at predetermined intervals in the openings 34B to 34F of the spacer 30, respectively. As shown in FIG. 40B to 40F are configured.

  In addition, as shown in FIG. 6, a cushion member 51 is provided on the side opposite to the spacer 30 side of the first insulating sheet 11 and has an elastic force and deforms so as to be crushed when pressure is applied. A cushion member 52 similar to the cushion member 51 is provided on the side of the second insulating sheet 21 opposite to the spacer 30 side. These cushion members 51 and 52 are made of a sponge-like resin provided with a large number of holes, a non-woven fabric in which resin fibers having elasticity are intertwined, rubber, or the like. The pair of cushion members 51 and 52 are congruent when viewed from a direction perpendicular to the second insulating sheet 21, and fit within the outer periphery of the arc portion 21A in the second insulating sheet 21 as shown in FIG. It has a shape like this. The cushion member 51 covers at least the openings 34 </ b> A to 34 </ b> F of the spacer 30 via the first insulating sheet 11 when viewed from a direction perpendicular to the spacer 30, and the cushion member 52 is interposed via the second insulating sheet 21. , At least the openings 34 </ b> A to 34 </ b> F of the spacer 30 are disposed.

  In the present embodiment, the total thickness at which the pair of cushion members 51 and 52 are crushed is equal to or greater than the distance between the opposing electrodes in each of the pressure sensitive switches 40A to 40F. The cushion members 51 and 52 have the same thickness, and the respective cushion members 51 and 52 have the same elastic force and are configured to be crushed in the same manner when the same pressure is applied. . Therefore, the seating sensor 1 can have the same seating detection sensitivity regardless of which of the first electrode sheet 10 and the second electrode sheet 20 is used.

  FIG. 7 is a circuit diagram showing an equivalent circuit of the circuit configuration of the seating sensor shown in FIG. As shown in FIG. 7, the pressure-sensitive switches 40 </ b> A to 40 </ b> F configured as described above are formed on the first wirings 16 </ b> A to 16 </ b> D and the second insulating sheet 21 formed on the surface of the first insulating sheet 11. The second wirings 26A to 26E are connected to each other. Thus, the circuit of the seating sensor 1 is configured by connecting the pressure sensitive switches 40A to 40F.

  An OR circuit is configured in the pressure-sensitive switch group including the pressure-sensitive switch 40A, the pressure-sensitive switch 40B, and the pressure-sensitive switch 40C, and the pressure-sensitive switch including the pressure-sensitive switch 40D, the pressure-sensitive switch 40E, and the pressure-sensitive switch 40F. An OR circuit is configured in the group. Further, the AND circuit includes a pressure sensitive switch group including the pressure sensitive switch 40A, the pressure sensitive switch 40B, and the pressure sensitive switch 40C, and a pressure sensitive switch group including the pressure sensitive switch 40D, the pressure sensitive switch 40E, and the pressure sensitive switch 40F. It is configured. Thus, in the seating sensor 1, the pressure-sensitive switches 40A to 40F constitute an AND-OR circuit.

  FIG. 8 is a diagram illustrating a state of the seat device according to the embodiment of the present invention. Specifically, FIG. 8A is a diagram showing a state of the seat device 9 in which the seating sensor 1 is disposed from above, and FIG. 8B is a seat device in which the seating sensor 1 is disposed. It is a figure which shows the mode of 9 from the side. As shown in FIGS. 8A and 8B, the seat device 9 is disposed on the seat pan 92, the cushion pad 93 disposed on the seat pan 92, the backrest 96, and the seat pan 92. The seating sensor 1 is sandwiched between the seat pan 92 and the cushion pad 93.

  The seat pan 92 is formed by bending a highly synthetic metal plate. As shown in FIG. 8A, the seat pan 92 is parallel to the front and rear direction of the cushion pad 93 and passes through the center line L in the width direction. As a reference, it has a line-symmetric shape. Further, a circular hole 94A whose center is located on the center line L is formed. Therefore, the center of the hole 94A is located on a line passing through the center of the sheet pan 92 in the width direction. Further, as shown in FIGS. 8A and 8B, a hole 94A is formed in front of the hip point HP when a person is normally seated on the seat device 9, and a hole is formed behind the hip point HP. 94B is formed, and a hole 94C is formed in the lateral direction of the hole 94A.

  Note that “regular seating” means sitting with the buttocks located deep in the seating surface and the back contacting the backrest 96, and “hip point” refers to FIG. As shown, when the person is seated, the buttock is at the lowest position.

  The cushion pad 93 is supported by the seat pan 92. The cushion pad 93 is made of foamed urethane having cushioning properties and is covered with a cloth skin (not shown). The backrest 96 is connected to the seat pan 92 by means (not shown) so as to come into contact with the cushion pad 93 behind the cushion pad 93.

  As shown in FIG. 8B, the seating sensor 1 is disposed on a seat pan 92 in a seat device 9 such as a vehicle, and is sandwiched between the seat pan 92 and a cushion pad 93. In the state where the seating sensor 1 is arranged in this way, the seating sensor 1 is formed at the center in the width direction in front of the hip point HP by the arc portions 11A and 21A of the first electrode sheet 10 and the second electrode sheet 20. The pressure sensitive switches 40A to 40C are adjacent to the hole 94A on the left side of the center line L of the seat pan 92, and the pressure sensitive switches 40D to 40F are arranged to surround the center line of the seat pan 92. On the right side of L, it is disposed adjacent to the hole 94A. Accordingly, each of the pressure sensitive switches 40A to 40F is disposed in front of the pip point when a person is normally seated. The term “adjacent to the hole” means that the element includes an edge forming the hole and is disposed within about 10 cm from the edge. Note that a line connecting the pressure sensitive switch 40A and the pressure sensitive switch 40D is perpendicular to the center line L, and the pressure sensitive switch 40A and the pressure sensitive switch 40D are in a position symmetrical with respect to the center line L. Has been placed. Similarly, the line connecting the pressure-sensitive switch 40B and the pressure-sensitive switch 40E is perpendicular to the center line L, and the pressure-sensitive switch 40B and the pressure-sensitive switch 40E are symmetrical with respect to the center line L. Is arranged. Further, the line connecting the pressure sensitive switch 40C and the pressure sensitive switch 40F is perpendicular to the center line L, and the pressure sensitive switch 40C and the pressure sensitive switch 40F are in positions symmetrical with each other with respect to the center line L. Has been placed. And since the AND circuit is comprised by the pressure sensitive switches 40A-40C and the pressure sensitive switches 40D-40F as mentioned above, the pressure sensitive switch arrange | positioned on the left side of the center line L, and the right side of the center line L An AND circuit is configured with the pressure sensitive switch arranged in the circuit. Further, as described above, the OR circuit is configured in the pressure-sensitive switch group including the pressure-sensitive switches 40A to 40C, and the OR circuit is configured in the pressure-sensitive switch group including the pressure-sensitive switches 40D to 40F. Each of the plurality of pressure sensitive switches arranged on the left side of the line L and the plurality of pressure sensitive switches arranged on the right side of the center line L constitutes an OR circuit.

  Then, the terminals 42A and 42B are electrically connected to an external power source (not shown) and a measurement unit, and a voltage is applied to the terminals 42A and 42B.

  In addition, since the seating sensor 1 is disposed so as to surround the hole 94A by the arc portions 11A and 21A of the first electrode sheet 10 and the second electrode sheet 20, the first insulating sheet 11 and the second insulating sheet 21 are provided with holes. The first wirings 16A to 16H and the second wirings 26A to 26E are also arranged so as not to overlap the hole 94A.

  Next, the operation of the seating sensor will be described.

  FIG. 9 is a concept similar to FIG. 1 showing the distribution of a load received from a person through the epidermis and cushion pad 93 by the seat pan 92 of the seat apparatus 9 in a state where the person is normally seated on the seat apparatus 9. FIG. 10 is a diagram showing a distribution of a load received by the seat pan 92 when a person is seated on the line XX in FIG. 9. Specifically, FIG. 10 is a view showing a distribution of a load received by the seat pan 92 when a person is seated on a line passing through the center of the hole 94A and along the width direction of the seat device 9. However, since FIG. 10 is a diagram based on the actual measurement data, the load is unevenly distributed due to the unevenness of the seat pan 92. In FIG. 9, the region 92a adjacent to the hole 94A formed in the seat pan 92 receives the highest pressing force from the cushion pad 93, and the region 92b outside the region 92a has the next highest pressing force. The region 92c outside the region 92b receives the next highest pressing force.

  As described with reference to FIG. 1, when a person sits on the seat device, the pressing force is concentrated on the surface of the cushion pad where the person's buttocks are located. Thus, the pressing force that the seat pan 92 receives from the cushion pad 93 due to a human load is widely dispersed on the seat pan 92. As shown in FIG. 9, when a person is seated, the seat pan 92 receives a relatively strong pressing force from the cushion pad 93 in the area adjacent to each hole of the seat pan 92 compared to the other portions. ing. In particular, the region adjacent to the hole 94A formed in front of the hip point HP is pressed with a stronger force than the region adjacent to the other holes 94B and 94C, and is formed in the lateral direction of the hole 94A. The area adjacent to the hole 94C is strongly pressed next to the area adjacent to the hole 94A.

  This is considered as follows. That is, when a person sits normally on the seat device 9 including the backrest 96, the person's back comes into contact with the backrest 96, the back is pushed by the backrest 96, and the force applied to the back pushes the person's buttocks forward. Therefore, the buttocks of the person who sits down presses the cushion pad 93 in the vertical direction by gravity, and pushes the cushion pad 93 forward by the force from the back. Thus, the pressing force received by the seat pan 92 from the cushion pad 93 is stronger than the other portions in front of the hip point HP of the person who is normally seated. And when a person sits, a person usually sits in the approximate center of the width direction of a cushion pad. Therefore, the vicinity of the center of the cushion pad 93 in the width direction, that is, the vicinity of the center line L tends to be pressed with a large force. Thus, before the hip point, the region adjacent to the hole 94A formed at the center in the width direction of the cushion pad is pressed with a larger force than the region adjacent to the other hole. Further, when a person sits normally on the seat device 9, the person's pelvis is arranged symmetrically in the left-right direction with respect to the center line L. For this reason, the distribution of the pressing force that the seat pan 92 receives from the cushion pad also extends in the lateral direction. Thus, the distribution of the pressing force spreads in the front direction and the width direction of the seat pan 92. For this reason, as described above, the region adjacent to the hole 94C formed in the lateral direction of the hole 94A is strongly pressed next to the region adjacent to the hole 94A. In the present embodiment, the place (maximum load region) where the seat pan 92 receives a particularly large pressing force from the cushion pad 93 is a region adjacent to the hole 94A in the lateral direction in the region 92a. In addition, when a person is seated as described above, the person normally sits at the approximate center in the width direction of the cushion pad, so that the pressing force received by the seat pan 92 from the cushion pad 93 is substantially symmetric with respect to the center line L. It has become.

  As described above, the seating sensor 1 is arranged so that the pressure-sensitive switches 40A to 40F are adjacent to the hole 94A. Therefore, each of the pressure-sensitive switches 40A to 40F is used when a person is normally seated. Therefore, it is possible to appropriately detect the pressing force caused by the seating of the person.

  FIG. 11 is a view showing, from the same viewpoint as FIG. 6, that the pressure sensitive switch is turned on in the state where the seating sensor is arranged in the seat as shown in FIG. In FIG. 11, only a part of the seat pan 92 and the cushion pad 93 is shown for easy understanding. When a person sits on the seat device 9, as shown in FIG. 11, a pressing force is applied from the seat pan 92 and the cushion pad 93 as indicated by arrows from a direction perpendicular to both surfaces of the seating sensor 1. That is, the cushion member 52 receives a pressing force from the cushion pad 93 of the seat, and the cushion member 51 receives a pressing force from the seat pan 92. At this time, the cushion members 51 and 52 are deformed so as to be crushed by the pressing force. Then, the first insulating sheet 11 and the second insulating sheet 21 receive the pressing force from the cushion members 51, 52 by the elastic force of the cushion members 51, 52 and bend so as to enter the opening 34 </ b> A of the spacer 30. For this reason, the electrodes 14A and 24A provided on the insulating sheets 11 and 21 facing each other through the opening 34A of the spacer 30 come into contact with each other. Thus, the pressure sensitive switch 40A is turned on.

  In the seating sensor 1 of the present embodiment, as described above, the total thickness at which the cushion members 51 and 52 are crushed is not less than the distance between the electrode 14A and the electrode 24A. Therefore, since the pressure sensitive switch 40A can be turned on only by deforming the cushion members 51 and 52 without being bent, the seating can be detected appropriately.

  Further, substantially the same pressing force is applied to the seating sensor 1 from the seat pan 92 and the cushion pad 93. Therefore, the pressing force applied from the seat pan 92 to the cushion member 51 and the pressing force applied from the cushion pad 93 to the cushion member 52 are substantially the same. In the present embodiment, since the cushion members 51 and 52 have the same elastic force as described above, when the same pressing force is applied, the cushion members 51 and 52 cause the insulating sheets 11 and 21 to have the same elastic force. Press. Therefore, the insulating sheets 11 and 21 are bent in the same manner, and the pair of electrodes 14A and 24A are in contact with each other in the vicinity of the substantially center in the thickness direction of the spacer 30 in the opening 34A. For this reason, it can suppress that the amount of bending of one insulating sheet becomes large, and can improve the detection sensitivity of seating.

  Moreover, when the 1st insulating sheet 11 and the 2nd insulating sheet 21 bend, the air in opening 34A is discharged | emitted from the gas outflow port 35 through the slits 36A, 36E, and 36F shown in FIG. Therefore, when a pressing force is applied to the seating sensor 1, the first insulating sheet 11 and the second insulating sheet 21 can be appropriately bent.

  Similarly, the other pressure sensitive switches 40B to 40F are also bent by the first insulating sheet 11 and the second insulating sheet 21 being pressed by the elastic force of the cushion members 51 and 52 in the same manner as the pressure sensitive switch 40A. Turn on at. At this time, the air in the openings 34B to 34F is discharged from the gas outlet 35 through the slits 36B to 36E. Therefore, similarly to when the pressure sensitive switch 40A is turned on, the first insulating sheet 11 and the second insulating sheet can be appropriately bent, and the pair of electrodes of the pressure sensitive switches 40B to 40F can be easily brought into contact with each other. ing.

  Since the AND-OR circuit is formed by the pressure sensitive switches 40A to 40F as described above, at least one of the pressure sensitive switches 40A to 40C and at least one of the pressure sensitive switches 40D to 40F are turned on. In this case, the terminal 42A and the terminal 42B are electrically connected. Thus, the seating of the person is detected by measuring a sensing signal sensed by the seating sensor 1 by a measurement unit (not shown). Since the AND circuit is formed by the pressure sensitive switches 40A to 40C and the pressure sensitive switches 40D to 40F as described above, the load is biased in the width direction of the cushion pad 93 by placing a load or the like on the seat device 9. In such a case, the seating sensor 1 can be prevented from being erroneously detected. Since each of the pressure sensitive switches 40A to 40C and the pressure sensitive switches 40D to 40F forms an OR circuit, the detection sensitivity of the seating sensor 1 is improved and seating can be detected appropriately.

  As described above, the seating sensor 1 is disposed so as to surround the hole 94A by the arc portions 11A and 21A of the first electrode sheet 10 and the second electrode sheet 20, and therefore, the first electrode sheet 10 and the second electrode sheet 10 The first wirings 16A to 16H and the second wirings 26A to 26E do not overlap with the hole 94A. Therefore, when a load is applied to the cushion pad 93, the cushion pad 93 is deformed so that a part of the cushion pad 93 enters the hole 94A of the seat pan 92 by its own elastic force. The first wirings 16A to 16H and the second wirings 26A to 26E can be prevented from being damaged.

  As described above, according to the seat device 9 in the present embodiment, the pressure sensitive switches 40A to 40F are arranged adjacent to the hole 94A formed in the seat pan 92, so that the cushion pad 93 is seated by sitting. When a load is applied, the cushion pad 93 appropriately presses the pressure sensitive switches 40A to 40F. In this way, a person's seating can be detected appropriately.

  Further, according to the seat device 9 of the present embodiment, the back of the person sitting is pushed by the backrest 96, and therefore the pressing force received by the seat pan 92 from the cushion pad 93 is more forward than the hip point HP of the person sitting normally. , It is relatively larger than the other parts. Therefore, since the hole 94A is formed in front of the hip point HP of the person who normally sits on the seat pan 92, the pressure sensitive switches 40A to 40F arranged so as to be adjacent to the hole 94A are also persons who normally sit. Since it is arranged in front of the pip point HP, it is possible to appropriately detect the seating of the person.

  Further, as described above, when a person is seated, the person is usually seated at the approximate center in the width direction of the cushion pad, so that the pressing force that the seat pan 92 receives from the cushion pad 93 is approximately the center line L. It is symmetrical. On the other hand, the load is not always placed at the center of the cushion pad 93 in the width direction. Therefore, when placing a load on the seat device 9, the pressing force received by the seat pan 92 from the cushion pad 93 tends not to be substantially symmetric with respect to the center line L. In the seating sensor 1, the pressure-sensitive switches 40A to 40C and the pressure-sensitive switches 40D to 40F are arranged so as to be symmetrical with respect to the center line L. In addition, it is possible to suppress erroneous detection of a package.

  Next, the material which comprises the seating sensor 1 is demonstrated.

  The insulating sheet 11 of the first electrode sheet 10, the insulating sheet 21 of the second electrode sheet 20, and the spacer 30 are made of an insulating resin having flexibility. Examples of such a resin include polyethylene terephthalate (PET), polyethylene naphthalate (PEN), and polyimide (PI). Among these, PEN is preferable from the viewpoint of excellent heat resistance.

  The adhesive applied to both surfaces of the spacer 30 is preferably an acrylic adhesive, for example, an acrylic polymer using one or more (meth) acrylic acid alkyl esters as monomer components. Based on

  The first electrodes 14A to 14F, the second electrodes 24A to 24F, the first wirings 16A to 16H, the second wirings 26A to 26E, and the terminals 42A and 42B are made of conductive paste or plating. It is comprised from the metal foil etc. which are formed by. Among these, a part may be comprised with an electroconductive paste, and another part may be comprised with the metal foil by plating. Examples of the conductive paste include various metal pastes such as silver paste, carbon paste, and the like. Moreover, as metal foil formed by plating, copper, nickel, or these laminated bodies are mentioned.

  Further, the cushion members 51 and 52 are members that have elastic force as described above and deform so as to be crushed. Although it will not be restrict | limited especially if it is the material which comprises such a member, As a material of the cushion members 51 and 52, resin and rubber | gum containing at least one of silicon and polyester can be mentioned. Among them, since the resin containing at least one of silicon and polyester has a small change in elastic force due to a change in temperature, even when the seating sensor 1 is disposed in a place where the environmental temperature changes greatly, such as an automobile, This is preferable because a change in the detected load can be suppressed.

(Second Embodiment)
Next, a second embodiment of the present invention will be described in detail with reference to FIGS. Note that, unless otherwise specified, the same or equivalent components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted. FIG. 12 is a plan view showing a seating sensor used in the seat device according to the second embodiment of the present invention.

  As shown in FIG. 12, the seating sensor 2 in this embodiment is different from the seating sensor 1 of the first embodiment in that the first electrodes 14A to 14F of the pressure sensitive switches 40A to 40F are composed of comb electrodes. Different.

  FIG. 13 is a plan view showing the first electrode sheet shown in FIG. As shown in FIG. 13, the comb-tooth electrodes constituting the first electrodes 14 </ b> A to 14 </ b> F have a plurality of conductors parallel to each other connected to each other on one side, and another plurality of conductors parallel to each other. They are connected to each other on the other side. And it arrange | positions so that the other several parallel conductor connected on the other side may enter between the several parallel conductors connected on the one side, and each conductor is arranged in order. The plurality of parallel conductors connected on one side and the other plurality of parallel conductors connected on the other side are insulated from each other with a certain distance from each other. Thus, a comb electrode has a set of parallel conductors insulated from each other in one electrode.

  The plurality of parallel conductors connected on one side of the first electrode 14A are connected to one end of the first wiring 16A extending from the first electrode 14A to the first electrode 14B along the arc portion 11A. . Further, the other plurality of parallel conductors connected on the other side of the first electrode 14A are connected to one end of the first wiring 16I extending from the first electrode 14A to the first electrode 14B along the arc portion 11A. ing. Further, the plurality of parallel conductors connected on one side of the first electrode 14B include one end of the first wiring 16B extending from the first electrode 14B to the first electrode 14C along the circular arc part 11A, and the first It is connected to the other end of the wiring 16A. Further, the other plurality of parallel conductors connected on the other side of the first electrode 14B are one end of the first wiring 16J extending from the first electrode 14B to the first electrode 14C along the arc portion 11A, and The other end of the first wiring 16I is connected. The plurality of parallel conductors connected on one side of the first electrode 14C are connected to the other end of the first wiring 16B, and further, the other plurality of parallel conductors connected on the other side of the first electrode 14C. The conductor is connected to the other end of the first wiring 16J.

  The plurality of parallel conductors connected on one side of the first electrode 14D are connected to one end of the first wiring 16C extending from the first electrode 14D to the first electrode 14E along the arc portion 11A. . Further, the other plurality of parallel conductors connected on the other side of the first electrode 14D are connected to one end of the first wiring 16K extending from the first electrode 14D to the first electrode 14E along the arc portion 11A. ing. Further, the plurality of parallel conductors connected on one side of the first electrode 14E include one end of the first wiring 16D extending from the first electrode 14E to the first electrode 14F along the arc portion 11A, and the first It is connected to the other end of the wiring 16C. Further, the other plurality of parallel conductors connected on the other side of the first electrode 14B are one end of the first wiring 16L extending from the first electrode 14E to the first electrode 14F along the arc portion 11B, and The other end of the first wiring 16K is connected. The plurality of parallel conductors connected on one side of the first electrode 14F are connected to the other end of the first wiring 16D, and further, the other plurality of parallel conductors connected on the other side of the first electrode 14F. The conductor is connected to the other end of the first wiring 16L.

  The plurality of parallel conductors connected on one side of the first electrode 14A are connected to the first wiring 16E similar to that of the first embodiment, and the plurality of parallel conductors connected on one side of the first electrode 14D. These parallel conductors are connected to the first wiring 16F similar to that of the first embodiment. Further, the plurality of parallel conductors connected on the other side of the first electrode 14A are connected to one end of the first wiring 16M extending from the first electrode 14A to the first electrode 14D along the arc portion 11A, The plurality of parallel conductors connected on the other side of the one electrode 14D are connected to the other end of the first wiring 16M.

  FIG. 14 is a plan view showing the second electrode sheet shown in FIG. As shown in FIG. 14, the second electrode sheet 20 of the present embodiment is different from the second electrode sheet 20 of the first embodiment in that the second wirings 26A to 26E are not provided.

  And as shown in FIG. 12, the 1st electrode sheet 10 and the 2nd electrode sheet 20 are piled up and integrated via the spacer 30 similar to 1st Embodiment.

  Thus, as in the first embodiment, an OR circuit is configured in the pressure-sensitive switch group including the pressure-sensitive switches 40A to 40C, and an OR circuit is configured in the pressure-sensitive switch group including the pressure-sensitive switches 40D to 40F. ing. Furthermore, an AND circuit is configured by the pressure sensitive switch group including the pressure sensitive switches 40A to 40C and the pressure sensitive switch group including the pressure sensitive switches 40D to 40F, and the AND-OR circuit is configured by the pressure sensitive switches 40A to 40F. Is configured.

  The seating sensor 2 of the present embodiment is arranged in the seat device as in the first embodiment, and when a person sits on the seat device, the pressure sensitive switches 40A to 40F are pressed by the pressing force from the cushion pad 93 and the seat pan 92. Is pressed. Then, at least one of the second electrodes 24A to 24C comes into contact with the parallel conductors in the first electrodes 14A to 14C. For this reason, a pair of parallel conductors insulated from each other in at least one of the first electrodes 14A to 14C are electrically connected via the second electrodes 24A to 24C. Similarly, at least one of the second electrodes 24D to 24F is in contact with the parallel conductors in the first electrodes 14D to 14F. For this reason, a set of parallel conductors insulated from each other in at least one of the first electrodes 14D to 14F are electrically connected via the second electrodes 24D to 24F. Thus, at least one of the pressure sensitive switches 40A to 40C and at least one of the pressure sensitive switches 40D to 40F are turned on. Thus, the seating sensor 2 detects the seating of the person.

  As mentioned above, although this invention was demonstrated to the example for embodiment, this invention is not limited to these.

  For example, in the above embodiment, the number of pressure-sensitive switches of the seating sensors 1 and 2 is six. However, the present invention is not limited to this, and the number of pressure-sensitive switches may be five or less, or may be seven or more.

  Further, in each of the pressure sensitive switches 40A to 40F, the first electrodes 14A to 14F and the second electrodes 24A to 24F have the same shape and size, and are completely overlapped with each other. The first electrode 14A to 14F and the second electrode 24A to 24F may be different in size, shape, and the like as long as the pressing force can be detected.

  Further, in the above embodiment, the hole 94A formed in the seat pan 92 is formed so that the center is located on the center line L that is parallel to the front-rear direction of the cushion pad 93 and passes through the center in the width direction. If the hole 94A is formed so as to overlap the center line L, it is possible to sufficiently detect the seating of a person sufficiently and to prevent erroneous detection of a load. Further, as described with reference to FIG. 9, when a person is seated, the seat pan 92 is compared with other portions in the region adjacent to the holes 94 </ b> B and 94 </ b> C other than the hole 94 </ b> A formed in the seat pan 92. In order to receive a relatively strong pressing force from the cushion pad 93, a pressure sensitive switch may be disposed in a region adjacent to the holes 94B and 94C. Alternatively, the hole 94 </ b> A may be biased to one side in the width direction of the seat pan 92. Furthermore, the hole 94A is not limited to a circle, and may be, for example, a rectangle or an ellipse.

  Furthermore, in the said embodiment, the structure which does not provide the cushion member 52 but provides only the cushion member 51 may be sufficient. Even in this case, the seating sensor 1 therefore presses the insulating sheet 11 so that the insulating member 11 on the seat pan side enters the opening of the spacer, and the insulating sheet 21 on the cushion pad 93 side The cushion pad 93 is bent so as to enter the openings 34 </ b> A to 34 </ b> F of the spacer 30 by the elastic force of the cushion pad 93. Thus, since the pair of insulating sheets bend, the pair of electrodes facing each other can be brought into contact with each other through the opening of the spacer, so that the pressure-sensitive switch can be appropriately turned on, and the seating is properly detected. be able to. Furthermore, the cushion members 51 and 52 are not necessarily required. Also in this case, the cushion pad 93 can detect the seating of the person by pressing the insulating sheet 21.

  Moreover, in the said embodiment, the 1st insulating sheet 11 and the 2nd insulating sheet 21 are arrange | positioned so that it may not overlap with the hole 94A, and 1st wiring 16A-16H and 2nd wiring 26A-E are also holes. The first insulating sheet 11 and the second insulating sheet 21 are arranged so as to overlap with the hole 94A, and the first wirings 16A to 16H and the second wiring are arranged. 26A to E may be arranged so as to overlap with the hole 94A.

  Further, when the pair of cushion members 51 and 52 are provided as in the above embodiment, the cushion members 51 and 52 have the same elastic force and the same thickness. Not limited to this, the cushion members 51 and 52 may have different elastic forces, and may have different thicknesses.

  Moreover, when the pair of cushion members 51 and 52 are provided as in the above embodiment, the cushion members 51 and 52 may have different shapes when viewed from a direction perpendicular to the seating sensor 1. . In this case, the cushion member 51 covers at least the openings 34A to 34F of the spacer 30 via the first insulating sheet 11, and the cushion member 52 covers at least the openings 34A to 34F of the spacer 30 via the second insulating sheet 21. It suffices that the cushion members 51 and 52 are disposed so as to cover each other, and at least one of the cushion members 51 and 52 may be provided only at a position overlapping the opening of the spacer 30.

  In the above embodiment, the AND-OR circuit is configured by the pressure sensitive switches 40A to 40F. However, the present invention is not limited to this, and for example, the OR circuit is configured by all of the pressure sensitive switches 40A to 40F. It may be configured to be formed, and an AND circuit may be formed by all of the pressure sensitive switches 40A to 40F. When an AND circuit is formed by all of the pressure sensitive switches 40A to 40F, the pressure sensitive switches 40A to 40F may be connected in series.

  In the above embodiment, the pressure sensitive switches 40A to 40C and the pressure sensitive switches 40D to 40F are arranged so as to be line-symmetric with respect to the center line L. At least one of 40C and at least one of the pressure sensitive switches 40D to 40F may be arranged at positions that are line-symmetric with respect to the center line L. Furthermore, the pressure sensitive switch may be arranged only on one side of the left and right with the center line L as a reference.

  ADVANTAGE OF THE INVENTION According to this invention, the seat apparatus which can detect a person's seating appropriately by the seating sensor arrange | positioned on a seat pan is provided.

DESCRIPTION OF SYMBOLS 1, 2 ... Seating sensor 9 ... Seat apparatus 10 ... 1st electrode sheet 11 ... 1st insulating sheet 14A-14F ... 1st electrode 16A-16M ... 1st wiring 20. .... 2nd electrode sheet 21 ... 2nd insulating sheet 24A-24F ... 2nd electrode 26A-26E ... 2nd wiring 30 ... Spacer 34A-34F ... Opening 36A-36F ... Slits 40A to 40F ... Pressure-sensitive switches 42A, 42B ... Terminals 51, 52 ... Cushion member 92 ... Seat pan 93 ... Cushion pads 94A, 94B, 94C ... Hole 96 ... Backrest

Claims (9)

A seat pan,
A cushion pad disposed on the seat pan;
A seating sensor having at least one pressure sensitive switch and disposed between the seat pan and the cushion pad;
With
A hole is formed in the seat pan,
The seating device, wherein the seating sensor is arranged so that the pressure sensitive switch is adjacent to the hole of the seat pan. The seating sensor is
A pair of insulating sheets having flexibility;
A sheet-like spacer interposed between the pair of insulating sheets and having at least one opening formed therein;
With
2. The seat device according to claim 1, wherein the pressure-sensitive switch includes a pair of electrodes that are provided on respective surfaces of the pair of insulating sheets and that face each other through the opening. The seating sensor is provided on a side opposite to the spacer side in at least one of the pair of insulating sheets, and includes a cushion member that covers at least the opening via the insulating sheet,
The seating device according to claim 2, wherein the seating sensor is arranged such that the cushion member is sandwiched between the seat pan and the insulating sheet. The hole of the seat pan is formed so as to overlap a center line passing through the center of the width direction parallel to the front-rear direction of the cushion pad,
The seating sensor has a plurality of the pressure sensitive switches, and at least one of the pressure sensitive switches is arranged on the left side and the right side with respect to the center line. A seat device given in any 1 paragraph.   At least one of the pressure sensitive switches provided on the left side and at least one of the pressure sensitive switches provided on the right side are provided at positions that are line-symmetric with respect to the center line. The seat apparatus according to claim 4, wherein   The seat device according to claim 4 or 5, wherein an AND circuit is formed by the pressure-sensitive switch disposed on the left side and the pressure-sensitive switch disposed on the right side. A plurality of the pressure sensitive switches are arranged on the left side and the right side of the seat pan,
The seat device according to claim 6, wherein the plurality of pressure sensitive switches arranged on the left side and the plurality of pressure sensitive switches arranged on the right side form an OR circuit, respectively. . The seating sensor further includes wiring connected to the pressure sensitive switch,
The seat device according to any one of claims 2 to 7, wherein the wiring is arranged at a position that does not overlap the hole of the seat pan.   The seat device according to any one of claims 2 to 8, wherein the insulating sheet is disposed at a position that does not overlap the hole of the seat pan.