JP2012121364A - Seating sensor and seat device using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seating sensor capable of preventing displacement while preventing the seating sensor from bringing a feeling of strangeness; and to provide a seat device using the same.SOLUTION: The seating sensor 1 is a seating sensor disposed on a seat pan 92 formed with a hole 94A comprises: pressure-sensitive switches 40A-40D; a first insulating sheet 11 that is provided with the pressure-sensitive switches 40A-40D; and a fitting member 60 that is provided in the first insulating sheet 11 and that has a fitting protrusion 61 for being fitted into a hole 94A of the seat pan 92.

Description

  The present invention relates to a seating sensor and a seat device using the seating sensor, and more particularly, to a seating sensor capable of preventing a positional shift on a seat pan and a seating device using the seating sensor.

  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 has been put into practical use. This alarm system detects the seating of a person and the wearing of a seat belt, and issues a warning when 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. In this seat device, a seating sensor is disposed between the skin of the seat and the cushion pad, and when pressure is applied to each pressure-sensitive switch, the pressure-sensitive switch is turned on to 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. Since only the epidermis is interposed between the person and the cushion pad when the person is seated, as shown in FIG. 1, the largest load is applied to the portion where the person's buttocks are located on the cushion pad. Join. 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.

  In particular, in the seat device in which the seating sensor is arranged on the cushion pad as described in Patent Document 1, the cushion pad is deformed by a person's seating or the like, and the seating sensor is slightly displaced due to this deformation. There is. Therefore, when the seat apparatus is used for a long period of time, the seating is repeated many times, so that the position of the seating sensor is shifted, and there is a possibility that accurate seating cannot be detected.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a seating sensor that can prevent a misalignment while preventing a sense of incongruity due to a seating sensor, and a seat device using the 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. Furthermore, we thought that the displacement of the seating sensor could be prevented by the deformation of the cushion pad due to the seating.

  However, the seat pan is usually made of painted metal, and the surface is slippery. Therefore, when the seating sensor is disposed on the seat pan, the seating sensor is displaced when the seat pan vibrates like a vehicle seating device, or the seat pan and the cushion pad are slightly displaced due to the seating. If the seating is repeated many times, the seating sensor may be displaced. Therefore, the present inventor has conducted further intensive studies and has come to carry out the present invention.

  The seating sensor of the present invention is a seating sensor disposed on a seat pan in which holes are formed, and is provided on at least one pressure-sensitive switch, an insulating sheet on which the pressure-sensitive switch is provided, and the insulating sheet. And a fitting member having a fitting convex part that fits into the hole of the seat pan.

  According to such a seating sensor, discomfort caused by the seating sensor can be prevented by arranging the seating sensor on the seat pan. Further, the fitting member is fixed to the seat pan by fitting the fitting convex portion into the hole formed in the seat pan. Since the pressure sensitive switch is provided on the insulating sheet provided with the fitting member, the position of the pressure sensitive switch is also fixed to the seat pan. Therefore, according to such a seating sensor, even when the seat pan vibrates like a vehicle seat device or when the seating is repeated, the seating sensor is prevented from being displaced on the seat pan. It is possible to prevent the displacement of the pressure sensor.

  In the seating sensor, it is preferable that a snap hook that engages with the seat pan is formed on the fitting convex portion.

  In such a seating sensor, it is possible to prevent the fitting convex portion from coming off the seat pan by the snap hook. Therefore, the fitting member can be prevented from coming out of the seat pan even when intense vibrations such as the cushion pad floating are applied to the seat pan.

  In the seating sensor, it is preferable that a part of the fitting member is fixed to a part of the surface of the insulating sheet on the side opposite to the surface on which the fitting convex portion protrudes.

  According to such a seating sensor, when the fitting member is pushed by the cushion pad on the seat pan, the insulating sheet is sandwiched by the seat pan and the portion fixed to the insulating sheet of the fitting member. . Therefore, the insulating sheet is more firmly fixed to the fitting member and the seat pan, thereby preventing the seating sensor from being displaced.

  In the seating sensor, the outer shape of the fitting convex portion is preferably non-circular when viewed from the convex direction of the fitting convex portion.

  According to such a seating sensor, the fitting member can be prevented from rotating with respect to the seat pan, and the displacement of the seating sensor can be further prevented.

  The seating sensor preferably includes a plurality of the fitting members.

  According to such a seating sensor, the displacement of the seating sensor can be further prevented, and in particular, the fitting member can be further prevented from rotating with respect to the seat pan.

  In the seating sensor, the fitting member is preferably made of a resin whose main component is any one of polybutylene terephthalate, polyamide, and polypropylene, or a mixture thereof.

  A seat device in which a seating sensor is arranged, such as a seat device of an automobile, may be placed in an environment in which a temperature change is severe. In such a case, since the seat pan is generally made of metal, the fitting member is affected by heat. Therefore, in such a seating sensor, since the fitting member is made of a material having excellent heat resistance, the fitting member is prevented from being deformed even when the temperature change in the environment where the seat device is placed is severe. be able to.

  The seating sensor according to the present invention includes a seat pan in which a hole is formed, a cushion pad disposed on the seat pan, and any one of the above seats disposed between the seat pan and the cushion pad. And the fitting convex portion of the seating sensor is fitted in the hole of the seat pan.

  According to such a seat device, it is possible to prevent a sense of incongruity due to the seating sensor, and even when the seat pan vibrates as in a vehicle seat device or when the seating is repeated, the position of the seating sensor Deviation can be prevented.

  As described above, according to the present invention, there are provided a seating sensor that can prevent misalignment caused by the seating sensor and can prevent displacement, and a seat device using the seating sensor.

It is a figure which shows distribution of the load which a cushion pad receives from a person through an epidermis in the state where the person seated normally to the seat apparatus. It is a top view which shows the seating sensor which concerns on 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 of the seating sensor in the VV line | wire of FIG. It is a figure which shows the mode of the cross section of the seating sensor in the VI-VI line 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 sectional drawing which shows a mode that the seating sensor is arrange | positioned on a seat pan. 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. 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 apparatus from the same viewpoint as FIG. It is a top view which shows the seating sensor 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 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 a cushion member disposed on the opposite side of the spacers of the first electrode sheet 10 and the second electrode sheet 20 and a fitting member 60 fixed to the first electrode sheet 10 as main components.

  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-like first insulating sheet 11, first electrodes 14 </ b> A to 14 </ b> D formed on the surface of the first insulating sheet 11, Terminals 42A and 42B formed on the surface of the insulating sheet 11 are provided as main components.

  The first insulating sheet 11 extends in a direction perpendicular to the longitudinal direction of the strip-shaped bottom portion 11A and the bottom portion 11A, and a pair of strip-shaped side portions 11B and 11C that are congruent with each other, and the longitudinal length of the bottom portion 11A. A belt-like upper part 11D extending in a direction parallel to the direction, a pair of belt-like arm parts 11E, 11F extending in a direction parallel to the longitudinal direction of the bottom part 11A, and a longitudinal direction of the bottom part 11A The tail portion 11G is shorter than the side portions 11B and 11C. One end of one side part 11B is connected to one end of the bottom part 11A, and one end of the other side part 11C is connected to the other end of the bottom part 11A. Furthermore, the other end of the side portion 11B is connected to one end of the upper portion 11D, and the other end of the side portion 11C is connected to the other end of the upper portion 11D. Thus, the bottom portion 11A and the respective side portions 11B, 11C, and the upper portion 11D are formed into a substantially square shape, and the bottom portion 11A, the side portions 11B, 11C, and the upper portion 11D are substantially rectangular. An opening is formed. One arm portion 11E has one end connected to the outside of the opening in the middle of the one side portion 11B, and the other end of the arm portion 11E is a free end outside the opening. Furthermore, in the middle of the other side portion 11C, one end of the other arm portion 11F is connected outside the opening, and the other end of the arm portion 11F is a free end outside the opening. Further, one end of the tail part 11G is connected to the inside of the opening in the middle part in the longitudinal direction of the bottom part 11A, and nothing is connected to the other end of the tail part 11G. It is a free end inside. Thus, the first insulating sheet 11 has a symmetrical shape with reference to a line passing through the center of the tail part 11G and extending along the longitudinal direction of the tail part 11G.

  Each of the first electrodes 14A to 14D on the first insulating sheet 11 has a substantially circular shape. The first electrode 14A is provided on the arm portion 11E at a predetermined interval from the edge of the free end side of the one arm portion 11E, and the first electrode 14D is provided on the other arm portion 11F. It is provided on the arm portion 11F at a predetermined interval from the edge on the free end side. The first electrode 14B is provided on the side portion 11B at a place where one side portion 11B and one end of the upper portion 11D are connected. Furthermore, the first electrode 14C is provided on the side portion 11B at a place where the other side portion 11C and the other end of the upper portion 11D are connected.

  Thus, the first electrodes 14A and 14B and the first electrodes 14D and 14C provided on the surface of the first insulating sheet 11 pass through the center of the tail part 11G and extend along the longitudinal direction of the tail part 11G. Are provided so as to be symmetrical with respect to each other.

  Further, the terminals 42A and 42B have a substantially rectangular shape, and the terminals 42A and 42B are arranged in a longitudinal direction of the tail part 11G at a position spaced from the end on the free end side on the surface of the tail part 11G. They are juxtaposed along the vertical direction.

  Further, the first electrode 14A and the terminal 42A are electrically connected to each other by the first wiring 16A. The first wiring 16A extends in the longitudinal direction of the arm portion 11E, one end thereof is connected to the first electrode 14A, and is bent vertically at a connection point between the arm portion 11E and the side portion 11B. It further extends in the longitudinal direction of the portion 11B. Then, the first wiring 16A is bent again vertically at the connection point between the side part 11B and the bottom part 11A, further extends in the longitudinal direction of the bottom part 11A, and the connection point between the bottom part 11A and the tail part 11G. Is bent vertically again, further extends in the longitudinal direction of the tail portion 11G, and the other end is connected to the terminal 42A. The first electrode 14D and the terminal 42B are electrically connected to each other by the first wiring 16B. The first wiring 16B extends in the longitudinal direction of the arm portion 11F, one end thereof is connected to the first electrode 14D, and is bent vertically at a connection point between the arm portion 11F and the side portion 11C. Further extending in the longitudinal direction of the portion 11C. The first wiring 16B bends again vertically at the connection point between the side part 11C and the bottom part 11A, extends further in the longitudinal direction of the bottom part 11A, and is a connection point between the bottom part 11A and the tail part 11G. Is bent again vertically and further extends in the longitudinal direction of the tail portion 11G, and the other end is connected to the terminal 42B. Further, the first electrode 14B and the first electrode 14C are electrically connected to each other by the first wiring 16C. The first wiring 16C extends in the longitudinal direction of the upper portion 11D, and has one end connected to the first electrode 14B and the other end connected to the first electrode 14C.

  Thus, as shown in FIG. 3, in the first electrode sheet 10, the first electrode 14B and the first electrode 14C are electrically connected to each other as described above, and the first electrodes 14B and 14C The one electrode 14A and the first electrode 14D are insulated from each other.

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

  The second insulating sheet 21 includes a bottom portion 21A having the same shape and size as the bottom portion 11A of the first insulating sheet 11, and a pair of side portions 11B and 11C of the first insulating sheet 11 and the shape and size. A pair of side portions 21B, 21C having the same shape, an upper portion 21D having the same shape and size as the upper portion 11D in the first insulating sheet 11, and a pair of arm portions 11E in the first insulating sheet 11. , 11F and a pair of arm portions 21E, 21F having the same shape and size, and a tail portion 21G having the same width and a short length as the tail portion 11G of the first insulating sheet 11. Is done. When the bottom part 21A, the side parts 21B and 21C, the top part 21D, and the arm parts 21E and 21F are overlapped, the first electrode sheet 10 and the second electrode sheet 20 are overlapped with each other. The bottom portion 11A, the side portions 11B and 11C, the top portion 11D, and the arm portions 11E and 11F in the insulating sheet 11 are connected so as to completely overlap. Further, the tail part 21G of the second insulating sheet 21 overlaps the tail part 11G of the first electrode sheet 10 when the first electrode sheet 10 and the second electrode sheet 20 are overlapped with each other. It connects with bottom part 21A so that 42A and 42B may 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 24D have the same shape and size as the first electrodes 14A to 14D. Furthermore, the second electrodes 24 </ b> A to 24 </ b> D 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. 14D is provided at a position completely overlapping with 14D.

  Further, the second electrode 24A and the second electrode 24B are electrically connected to each other by the second wiring 26A. The second wiring 26A extends in the longitudinal direction of the arm portion 21E, one end thereof is connected to the second electrode 24A, and is bent vertically at a connection point between the arm portion 21E and the one side portion 21B. Furthermore, it extends in the longitudinal direction of the side portion 21B, and the other end is connected to the second electrode 24B. Further, the second electrode 24D and the second electrode 24C are electrically connected to each other by the second wiring 26B. The second wiring 26B extends in the longitudinal direction of the arm portion 21F, one end thereof is connected to the second electrode 24D, and is bent vertically at a connection point between the arm portion 21F and the other side portion 21C. Furthermore, it extends in the longitudinal direction of the side portion 21C, and the other end is connected to the second electrode 24C.

  Thus, as shown in FIG. 4, in the second electrode sheet 20, as described above, the second electrode 24A and the second electrode 24B are electrically connected to each other, and the second electrode 24D and the second electrode 24C. Are electrically connected to each other, and the second electrodes 24A and 24B and the second electrodes 24D and 24C are insulated from each other.

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

  Further, the spacer 30 is formed with slits 36 </ b> A to 36 </ b> D that spatially connect the openings 34 </ b> A to 34 </ b> D to the outside of the spacer 30. Specifically, one end of each of the slits 36 </ b> A to 36 </ b> D is connected to the outside of the spacer 30. The other end of the slit 36A is connected to the opening 34A, the other end of the slit 36B is connected to the opening 34B, the other end of the slit 36C is connected to the opening 34C, and the other end of the slit 36D is connected to the opening 34D. Connected with.

  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 includes a first electrode sheet 10 and a second electrode sheet 20 that are overlapped with a spacer 30 interposed therebetween, and an adhesive applied to both surfaces of the spacer 30. They are fixed to each other and integrated.

  When the first electrode sheet 10, the spacer 30, and the second electrode sheet 20 are integrated with each other as seen from a direction perpendicular to the seating sensor 1, the first electrode as shown in FIG. The first electrode 14A of the sheet 10 and the second electrode 24A of the second electrode sheet 20 overlap each other, and the opening 34A formed in the spacer 30 is within the outer shape of 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 having the first and second insulating sheets 11 and 21, the sheet-like spacer 30 in which the opening 34A is formed, and the pair of electrodes 14A and 24A facing each other through the opening 34A. 40A is configured. Similarly, the other first electrodes 14B to 14D and the other second electrodes 24B to 24D are opposed to each other at predetermined intervals in the openings 34B to 34D of the spacer 30, respectively. As shown in FIG. 40B to 40D are configured. The pressure sensitive switches 40 </ b> A to 40 </ b> D are provided in addition to the tail portions 11 </ b> G and 21 </ b> G on the first and second insulating sheets 11 and 21. The first and second insulating sheets 11 and 21 are fixed.

  As shown in FIGS. 2 and 6, a cushion member 52 is provided on the opposite side of the second insulating sheet 21 from the spacer 30 side and has an elastic force and deforms so as to be crushed when pressure is applied. ing. The cushion member 52 is disposed on the second insulating sheet 21 so that one end side covers the pressure sensitive switch 40A. The cushion member 52 extends along the longitudinal direction of the arm portion 21E of the second insulating sheet 21, and the arm portion 21E of the second insulating sheet 21 and one side portion 21B are connected to each other. Are bent vertically and extend along the longitudinal direction of the side portion 21B. Furthermore, the cushion member 52 covers the pressure-sensitive switch 40B at a place where the side portion 21B and the upper portion 21D of the second insulating sheet 21 are connected, bends vertically, and extends along the longitudinal direction of the upper portion 21D. Extend. The cushion member 52 covers the pressure-sensitive switch 40C at the place where the upper portion 21D and the other side portion 21C of the second insulating sheet 21 are connected, and is bent vertically, and the longitudinal direction of the side portion 21C. Extending along. The cushion member 52 is bent vertically at the place where the side portion 21C and the arm portion 21F of the second insulating sheet 21 are connected, and extends along the longitudinal direction of the arm portion 21F. On the other end side of 52, the pressure sensitive switch 40D is covered. Thus, the cushion member 52 covers the pressure sensitive switches 40A to 40D.

  Further, as shown in FIG. 6, a cushion member 51 is provided on the side of the first insulating sheet 11 opposite to the spacer 30 side. The cushion member 51 has the same shape as the cushion member 52, and the cushion member 52 overlaps with the cushion member 52 when viewed from a direction perpendicular to the first insulating sheet 11. Therefore, the cushion member 51 covers the pressure sensitive switches 40 </ b> A to 40 </ b> D on the side opposite to the spacer 30 side of the first insulating sheet 11.

  In the present embodiment, the total thickness at which the pair of cushion members 51 and 52 is crushed is equal to or greater than the distance between the opposing electrodes in each of the pressure sensitive switches 40A to 40D. The cushion members 51 and 52 have the same thickness, and the cushion members 51 and 52 are made of the same material and have the same elastic force, and are similarly crushed when the same pressure is applied. It is configured as follows. 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 diagram illustrating a cross-sectional state of the seating sensor taken along line VI-VI in FIG. 2. As shown in FIGS. 2 and 7, the fitting member 60 is provided on the side opposite to the spacer 30 side of the first insulating sheet 11, and has a flange portion 62 fixed to the first insulating sheet 11, and the flange portion 62. The fitting convex part 61 connected to is provided as a main structure. The fitting member 60 also serves as a protective member that protects the tail portion 11G of the first insulating sheet 11.

  The fitting convex portion 61 is formed in a cylindrical shape along the edge of the substantially square opening formed by the bottom portion 11A, the side portions 11B and 11C, and the upper portion 11D in the first insulating sheet 11. The first insulating sheet 11 is provided on the spacer 30 side. Therefore, the outer shape of the fitting convex portion 61 is substantially square when viewed from the direction perpendicular to the first insulating sheet 11, that is, when viewed from the convex direction of the fitting convex portion 61, and is non-circular. . Moreover, the fitting convex part 61 is comprised from the material which has flexibility, and the key-shaped hook part 63 is formed in the opposite side to the collar part 62 side in the fitting convex part 61. FIG. Thus, a snap hook is formed on the fitting convex portion 61 by the hook portion 63 and other portions. This snap hook is a type of hook that engages with a plate-like member or the like, and is a hook that is inserted into a hole or notch provided in the plate-like member or the like and engages with the plate-like member or the like. Specifically, when inserted into the hole or the like of the plate-like member, the entire snap hook is bent slightly, and when the hook portion 63 is inserted into the hole or the like, this bending is restored to the original and the hook portion is returned to the plate-like member. And the like.

  Further, the flange portion 62 has a plate shape in which an opening corresponding to the through hole of the fitting convex portion 61 is formed. The fitting convex portion 61 extends along the surface of the first insulating sheet 11. It is formed to spread outside. Further, the bottom surface 62a (surface opposite to the first insulating sheet 11 side) 62a of the flange portion 62 is formed in a planar shape and is a surface perpendicular to the direction in which the fitting convex portion 61 protrudes. . And the collar part 62 is formed in the part which overlaps with the tail part 11G of the 1st insulating sheet 11 so that it may become thin gradually from the free end side of the tail part 11G toward the opposite side to the free end side of the tail part 11G. ing. That is, the flange portion 62 is formed so that the thickness decreases from the inner peripheral side to the outer peripheral side in the portion overlapping the tail portion 11G of the first insulating sheet 11.

  Further, the fitting member 60 has a curved surface 64 that changes along the length direction of the tail portion 11G from the flange portion 62 to the fitting convex portion 61 at a position overlapping the tail portion 11G of the first insulating sheet 11. Is formed. The curved surface 64 is preferably formed at least from a portion parallel to the bottom surface 62a of the flange portion 62 on the upper surface of the flange portion 62 to a portion perpendicular to the bottom surface 62a. The upper surface is formed about 180 degrees from a portion parallel to the bottom surface 62a of the flange portion 62.

  And the fitting member 60 is being fixed to the 1st insulating sheet 11 because the outer peripheral part adheres to the 1st insulating sheet 11 as the collar part 62. FIG. Examples of means for fixing the flange portion 62 to the first insulating sheet 11 include adhesion using an adhesive, and fusion bonding and fixing at least one of the first insulating sheet 11 and the flange portion 62.

  FIG. 8 is a circuit diagram showing the circuit configuration of the seating sensor 1 shown in FIG. 2 as an equivalent circuit. As shown in FIG. 8, the pressure sensitive switches 40 </ b> A to 40 </ b> D and the terminals 42 </ b> A and 42 </ b> B configured as described above are formed on the surface of the first insulating sheet 11. And connected to each other by second wirings 26A and 26B formed on the surface of the second insulating sheet 21. Thus, the circuit of the seating sensor 1 is configured by connecting the pressure sensitive switches 40A to 40D. The terminal 42A, the pressure sensitive switch 40A, the pressure sensitive switch 40B, the pressure sensitive switch 40C, the pressure sensitive switch 40D, and the terminal 42B are electrically connected in series in this order.

  FIG. 9 is a diagram illustrating a state of the seat device according to the embodiment of the present invention. Specifically, FIG. 9A is a diagram showing a state of the seat device 9 in which the seating sensor 1 is disposed from above, and FIG. 9B 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. 9A and 9B, the seat device 9 is disposed on the seat pan 92, a cushion pad 93 disposed on the seat pan 92, a backrest 96, and the seat pan 92. The seat device 9 is sandwiched between the seat pan 92 and the cushion pad 93, and the seat device 9 is, for example, a vehicle seat device.

  The seat pan 92 is composed of a highly synthetic metal plate. As shown in FIG. 9A, the seat pan 92 is a line with a center line L parallel to the front-rear direction of the cushion pad 93 and passing through the center in the width direction as a reference. It has a symmetrical shape. Further, the seat pan 92 is formed with a substantially square hole 94A substantially in the center, and further, a substantially square hole 94B is formed behind the hole 94A. As shown in FIGS. 9A and 9B, the hole 94A is formed in front of the hip point HP when a person is normally seated on the seat device 9, and the hole 94B is formed at the hip point HP. It is formed slightly behind.

  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. 9B. 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. Therefore, the cushion pad 93 has an elastic force and is deformed so as to be crushed when a pressing force is applied. The cushion pad 93 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. 9B, the seating sensor 1 is disposed on the seat pan 92 in the seat device 9 and is sandwiched between the seat pan 92 and the cushion pad 93. Further, in the state where the seating sensor 1 is arranged in this way, the second insulating sheet 21 is arranged on the cushion pad 93 side, the cushion member 52 is sandwiched between the cushion pad 93 and the second insulating sheet 21, and The first insulating sheet 11 is disposed on the seat pan 92 side, and the cushion member 51 is sandwiched between the seat pan 92 and the first insulating sheet 11.

  As shown in FIG. 9A, the seating sensor 1 includes a seat pan 92 in an opening formed in the first insulating sheet 11 by the bottom portion 11A, the side portions 11B and 11C, and the upper portion 11D. It arrange | positions so that the hole 94A may be located. The pressure-sensitive switches 40A and 40B are arranged at positions that are mutually targeted with respect to the center line L with the hole 94A interposed therebetween, and the pressure-sensitive switches 40B and 40C are respectively located in the center line in front of the hole 94A. With respect to L, they are arranged at positions that are mutually targeted. Accordingly, the seating sensor 1 is arranged such that each of the pressure sensitive switches 40A to 40D is in front of the hip point HP of the person who normally sits on the seat pan 92. Furthermore, since the distance between the pressure sensitive switch 40B and the pressure sensitive switch 40C is shorter than the distance between the pressure sensitive switch 40A and the pressure sensitive switch 40D, the pressure sensitive switches 40B and 40C are more central than the pressure sensitive switches 40A and 40D. It is arranged at a position close to the line L.

  FIG. 10 is a cross-sectional view showing a state in which the seating sensor 1 is disposed on the seat pan 92, and is a cross-sectional view taken along the center line L in FIG. In FIG. 10, the cushion pad 93 is omitted. As shown in FIG. 10, the fitting member 60 is disposed between an edge that is an edge of the hole 94 </ b> A of the seat pan 92 and the tail portion 11 </ b> G of the first insulating sheet 11. In addition to being disposed on the pan 92, the fitting convex portion 61 is inserted and fitted into the hole 94 </ b> A, and the hook portion 63 is engaged with the seat pan 92.

  Further, as shown in FIG. 10, the tail portion 11G of the first insulating sheet 11 is led out below the seat pan 92 along the curved surface 64 of the fitting member 60, and is folded back by about 180 degrees. Accordingly, the terminals 42A and 42B are led out from the hole 94A below the seat pan 92, and are electrically connected to an external power source and control unit (not shown). As described above, in the present embodiment, at the position where the curved surface 64 overlaps the tail portion 11G of the first insulating sheet 11, at least from the portion parallel to the bottom surface 62a of the flange portion 62 on the upper surface of the flange portion 62. , About 180 degrees. Accordingly, the tail portion 11G of the first insulating sheet 11 is bent by 180 degrees along this curved surface, and the tail portion 11G of the first insulating sheet 11 is sharply bent, and the first wiring 16A on the tail portion 11G is bent. , 16B is prevented. As the tail portion 11G is curved, the spacer 30 and the tail portion 21G of the insulating sheet 21 are also curved along the tail portion 11G of the first insulating sheet 11.

  Further, as described above, the flange portion 62 is formed so that the thickness decreases from the inner peripheral side to the outer peripheral side in the portion overlapping the tail portion 11G of the first insulating sheet 11. Accordingly, in a state where the seating sensor 1 is disposed on the seat pan 92, the first insulating sheet 11 gradually approaches the seat pan from the free end side of the tail portion 11G toward the side opposite to the free end, and the collar portion 62 Even in the portion overlapping the edge, it is slightly curved with a natural curved surface. As the first insulating sheet 11 is curved, the spacer 30 and the insulating sheet 21 are also curved with a natural curved surface.

  A voltage is applied to the terminals 42A and 42B led out from the hole 94A below the seat pan 92 in this way, and the seating sensor 1 performs the seating detection operation.

  Next, the operation of the seating sensor 1 in the seat device 9 will be described.

  FIG. 11 shows that the seat pan 92 of the seat device 9 receives from the person via the epidermis and the cushion pad 93 in a state where the person is normally seated on the seat device 9 as indicated by a broken line in FIG. It is a conceptual diagram which shows distribution of a load. As shown in FIG. 11, in the seat device 9, 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, and a hole 94 </ b> A formed in the seat pan 92. 92A receives the highest pressing force from the cushion pad 93, the region 92B outside the region 92A receives the next highest pressing force, and the region 92C outside the region 92B receives the next highest pressing force. Under pressure.

  Further, the place (maximum load region) MG where the seat pan 92 receives a large pressing force from the cushion pad 93 is in front of the hip point HP of the person who is normally seated, and beside the hole 94A. On the other hand, in the vicinity of the hole 94B formed behind the hip point HP, the seat pan 92 receives only a smaller pressing force from the cushion pad 93 than the periphery of the hole 94A. This is considered as follows. That is, when a person normally sits on the seat device 9 including the backrest 96, the person's back comes into contact with the backrest 96, the backrest 96 pushes the back, 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 that the seat pan 92 receives from the cushion pad 93 is relatively stronger than the other portions in front of the hip point HP of the person who is normally seated. And when a person sits normally, a person 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. Therefore, the area adjacent to the hole 94A formed in the center in the width direction of the cushion pad 93 is pressed with a greater force than the area adjacent to the other hole in front of the hip point HP. Further, since the force applied to the back pushes the person's buttocks forward as described above, the force received by the seat pan spreads forward, and when the person sits normally on the seat device 9 as described above, Since the person's pelvis is seated symmetrically in the left-right direction with respect to the center line L, the pressing force received by the seat pan 92 from the cushion pad 93 is approximately the center of the cushion pad 93 in the width direction. , It also extends in the width direction substantially symmetrically about the center line L.

  The “maximum load area MG” is a pressing force at a place where the seat pan receives the greatest pressing force from the cushion pad, assuming that the pressing force at the place where the seat pan is not receiving the most pressing force from the cushion pad. When 100 is 100, it refers to a region that receives 90 or more pressing force.

  Thus, when the seat pan 92 is pressed against the cushion pad 93, the cushion pad 93 is deformed so as to be hard to be inserted into the hole 94A, so that the edge of the seat pan 92 forming the hole 94A is larger than the cushion pad 93. Pressed with force. Therefore, the portion of the insulating sheet 11 of the seating sensor 1 that overlaps the edge is also pressed with a large force. However, since the fitting member 60 is interposed between the edge of the seat pan 92 and the insulating sheet 11, the tail portion 11G of the insulating sheet 11 is prevented from being sharply bent.

  FIG. 12 is a view showing, from the same viewpoint as FIG. 7, that the pressure sensitive switch 40A is turned on in a state where the seating sensor 1 is arranged in the seat device 9. FIG. In FIG. 12, only a part of the seat pan 92 and the cushion pad 93 is shown for easy understanding.

  When a person is seated, the pressure-sensitive switch 40A disposed in front of the hip point HP and on the side of the maximum load region MG is, as shown in FIG. 12, from a direction perpendicular to both surfaces of the seating sensor 1. The seat pan 92 and the cushion pad 93 are appropriately pressed as indicated by arrows. 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 first 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.

  As described above, when a person sits normally on the seat device 9, the pressing force that the seat pan 92 receives from the cushion pad 93 due to the load of the person is widely dispersed on the seat pan 92. Therefore, the other pressure sensitive switches 40B to 40D 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.

  Since the pressure sensitive switches 40A to 40D are connected in series as described above, when all of the pressure sensitive switches 40A to 40D are turned on, the terminal 42A and the terminal 42B are electrically connected. In this way, a sensing signal sensed by the seating sensor 1 is sensed by a control unit (not shown) electrically connected to the terminals 42 </ b> A and 42 </ b> B below the seat device 9 to detect the seating of a person.

  The pressure sensitive switches 40A and 40D are arranged on both sides of the hole 94A as described above, and the sides of the hole 94A are in the vicinity of the maximum load region MG as shown in FIG. And since the pressure sensitive switches 40A and 40D are farther from the center line L in FIG. 9A and FIG. 10 than the pressure sensitive switches 40B and 40C arranged in front of the hole 94A, the seat device. 9 can suppress the difference between the pressing force applied to the pressure sensitive switches 40A and 40D and the pressing force applied to the pressure sensitive switches 40B and 40C.

  Moreover, in the seating sensor 1 of this embodiment, the sum total of the thickness which the cushion members 51 and 52 collapse is more than the distance between electrode 14A-14D and electrode 24A-24D as mentioned above. Therefore, since the pressure sensitive switches 40A to 40D 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 similarly bent, and the pair of electrodes 14A to 14D and 24A to 24D in the respective pressure sensitive switches 40A to 40D are within the openings 34A to 34D in the thickness direction of the spacer 30. Contact near the center. For this reason, it is suppressed that the bending amount of one insulating sheet becomes large, and the detection sensitivity of seating is improved.

  Moreover, when the 1st insulating sheet 11 and the 2nd insulating sheet 21 bend, the air in each opening 34A-34D is discharged | emitted outside through slit 36A-36D. Accordingly, when each of the pressure sensitive switches 40A to 40D is turned on, the first insulating sheet 11 and the second insulating sheet can be appropriately bent, and the pair of electrodes of each of the pressure sensitive switches 40A to 40D can be easily contacted. ing.

  As described above, according to the seating sensor 1 of the present embodiment, by disposing the seating sensor 1 on the seat pan 92, it is possible to prevent a sense of incongruity due to the seating sensor 1 when a person is seated. Further, the fitting member 60 is fixed to the seat pan 92 by fitting the fitting convex portion into the hole 94 </ b> A formed in the seat pan 92. Since the pressure sensitive switches 40A to 40D are provided on the first insulating sheet 11 provided with the fitting member 60, the positions of the pressure sensitive switches 40A to 40D are also fixed to the seat pan 92. Therefore, according to such a seating sensor 1, even when the seat pan 92 vibrates as in a vehicle seat device or when the seating is repeated, the seating sensor 92 is displaced in position. Can be prevented, and displacement of the pressure-sensitive sensor can be prevented.

  Further, in the seating sensor 1, the fitting convex portion 61 can be prevented from coming off from the seat pan 92 by the snap hook formed by the hook portion 63 and other portions. Accordingly, the seating sensor 1 can be fixed to the seat pan 92 even when intense vibrations such as the cushion pad 93 floating are applied to the seat pan 92.

  Further, the seating sensor 1 prevents the fitting member 60 from rotating with respect to the seat pan 92 because the outer shape of the fitting convex portion 61 is non-circular when viewed from the direction of the fitting convex portion 61. It is possible to prevent the seating sensor 1 from being displaced.

  In this way, according to the seat device 9 of the present embodiment, the seated person does not receive the touch of the seating sensor 1 and the position shift of the seating sensor 1 can be prevented.

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

  The 1st insulating sheet 11 of the 1st electrode sheet 10, the insulating sheet 21 of the 2nd electrode sheet 20, and the spacer 30 are comprised from the insulating resin which has 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 cost and 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 14D, the second electrodes 24A to 24D, the first wirings 16A to 16C, the second wirings 26A and 26B, 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.

  In particular, at least one of the first electrodes 14A to 14D and the second electrodes 24A to 24D is preferably made of a material whose resistance value increases as the temperature increases. The flexible resin such as the first insulating sheet 11 and the second insulating sheet 21 is usually easily bent as the temperature rises. When the temperature of the environment where the seat device 9 is placed rises, the first resin is weakly pressed. 1 electrode 14A-14D and 2nd electrode 24A-24D become easy to contact. In this case, as described above, if at least one of the first electrodes 14A to 14D and the second electrodes 24A to 24D is an electrode whose resistance value increases as the temperature rises, the first temperature increases as the temperature increases. The insulating sheet 11 and the second insulating sheet 21 are easily bent, and the first electrodes 14A to 14D and the second electrodes 24A to 24D are easily in contact with each other, but current is less likely to flow through the contacted electrodes. Therefore, even when the ease of contact between the electrodes and the difficulty of the flow of current flowing through the electrodes cancel each other and the environmental temperature of the seat device 9 changes, the pressing force that turns on the pressure sensitive switches 40A to 40D. Can be prevented from changing. In particular, when the seat device 9 is mounted on an automobile, the temperature change in the vehicle is large. In general, since the seat pan 92 is metallic, heat is easily transmitted to the seating sensor 1. Therefore, as described above, if at least one of the first electrodes 14A to 14D and the second electrodes 24A to 24D is made of a material whose resistance value increases as the temperature rises, It is also possible to detect the seating of a person appropriately. Therefore, such a seat device 9 is particularly useful for automobile applications. Examples of such an electrode include a two-layer electrode in which a carbon paste is applied on a silver paste.

  Further, the cushion members 51 and 52 are members that have elastic force as described above and deform so as to be crushed. The material of the member is not particularly limited, but the material of the cushion members 51 and 52 is a sponge-like resin provided with a large number of holes or a resin having elasticity. Nonwoven fabrics, rubbers and the like in which manufactured fibers are intertwined can be mentioned. As such a resin, a resin containing at least one of silicon and polyester can be used. With such a resin, the change in elastic force due to a change in temperature is small. Even in a case where the change in the environmental temperature is large, it is preferable because the change in the seating detection load can be suppressed.

  Moreover, it is preferable that the fitting member 60 is comprised from resin, and as such resin, any of polybutylene terephthalate (PBT), polyamide (PA), polypropylene (PP), or a mixture thereof is preferable. Can be mentioned as a main component. In particular, the PBT is preferable from the viewpoint that the fitting member 60 can be prevented from being deformed or the like even when the temperature change of the environment in which the seat device 9 is placed is severe. The fitting member 60 is preferably made of a material that is softer than the first insulating sheet 11. In this case, since the fitting member 60 is deformed even when the first insulating sheet 11 is strongly pressed, it is possible to prevent the tail portion 11G of the first insulating sheet from being damaged.

(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. 13: is a top view which shows the seating sensor used for the seat apparatus which concerns on 2nd Embodiment of this invention.

  As shown in FIG. 13, the seating sensor 2 in this embodiment is different from the seating sensor 1 of the first embodiment in that the first electrodes 14 </ b> A to 14 </ b> D of the pressure sensitive switches 40 </ b> A to 40 </ b> D are composed of comb-tooth electrodes. Different.

  FIG. 14 is a plan view showing the first electrode sheet shown in FIG. As shown in FIG. 14, the comb-tooth electrodes constituting the first electrodes 14 </ b> A to 14 </ b> D 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 the first wiring 16A similar to the first embodiment. The other plural parallel conductors connected on the other side of the first electrode 14A are connected to the first wiring 16D. The first wiring 16D has one end connected to the other parallel conductors connected on the other side of the first electrode 14A as described above on the first insulating sheet 11, and the longitudinal direction of the arm portion 11E. At the connection point between the arm portion 11E and the one side portion 11B, further extending in the longitudinal direction of the side portion 11B, and the other end at one side of the first electrode 14B. It is connected to a plurality of connected parallel conductors. The other plurality of parallel conductors connected on the other side of the first electrode 14B are connected to one end of the first wiring 16C similar to that of the first embodiment, and the other end of the first wiring 16C is the first The electrode 14C is connected to a plurality of parallel conductors connected on one side. The other plurality of parallel conductors connected on the other side of the first electrode 14C are connected to one end of the first wiring 16E. On the first insulating sheet 11, the first wiring 16E has one end connected to the other plurality of parallel conductors connected on the other side of the first electrode 14C as described above, and the other side portion 11C. Extending in the longitudinal direction of the arm portion 11F, bent vertically at the connection point between the side portion 11C and the arm portion 11F, further extending in the longitudinal direction of the arm portion 11F, and the other end on one side of the first electrode 14D. It is connected to a plurality of connected parallel conductors. 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 16B similar to the first embodiment.

  FIG. 15 is a plan view showing the second electrode sheet shown in FIG. As shown in FIG. 15, 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 and 26B are not provided.

  And as shown in FIG. 13, the 1st electrode sheet 10 and the 2nd electrode sheet 20 which are shown in FIG. 14 are piled up and integrated via the spacer 30 similar to 1st Embodiment.

  In the seating sensor 2 of the present embodiment, when the pressure sensitive switches 40A to 40D are pressed by the cushion pad and the seat pan when a person is seated on the seat device, the second electrodes 24A to 24D are changed to the first electrode 14A. Contact each parallel conductor at ~ 14D. For this reason, a set of parallel conductors insulated from each other in the first electrodes 14A to 14D are electrically connected via the second electrodes 24A to 24D. Thus, the pressure sensitive switches 40A to 40D are turned on. Thus, when the pressure sensitive switches 40A to 40D are turned on, 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 fitting member 60 also serves as a protective member, but it does not necessarily have to serve as a protective member.

  Moreover, the hook part 63 is not provided in the fitting convex part 61, and the snap hook does not need to be formed. Further, although the fitting convex portion has a cylindrical shape, the fitting convex portion does not necessarily have to be a cylindrical shape, and a notch along the length direction of the cylinder may be formed at various locations of the cylinder. For example, a form in which a plurality of columnar snap hooks are provided at the edge of the opening of the first insulating sheet 11 may be employed.

  In the above-described embodiment, the flange portion 62 is gradually thinned from the free end side of the tail part 11G toward the side opposite to the free end side of the tail part 11G. However, this configuration is not essential and is fitted. If the member 60 can be fixed to the first insulating layer 11, the flange portion 62 is not necessarily required.

  In addition, the flange portion 62 is adhered to the side opposite to the spacer 30 side of the first insulating sheet 11, but at least one portion of the flange portion 62 is opposite to the side where the fitting convex portion 61 is formed. The first insulating sheet 11 may partially overlap. For example, the flange 62 is bonded to the opposite side of the spacer 30 of the second insulating sheet 21. In this case, when the seating sensor 1 is disposed on the seat pan 92, the fitting member 60 is pushed by the cushion pad 93 on the seat pan 92, so that the flange 62 of the fitting member 60 and the seat pan 92 The first and second insulating sheets 11 and 21 are sandwiched. Therefore, at least the first insulating sheet 11 is more firmly fixed to the fitting member 60 and the seat pan 92, thereby further preventing displacement of the seating sensor 1.

  In the above embodiment, the number of the fitting members 60 is one. However, when a plurality of holes are provided in the seat pan 92, it is preferable to provide a plurality of fitting members 60. With this configuration, it is possible to further prevent the seating sensor 1 from being displaced, and in particular, to prevent the fitting member 1 from rotating with respect to the seat pan 92.

  For example, in the above embodiment, the number of pressure sensitive switches of the seating sensor 1 is four, but the present invention is not limited to this, and the number of pressure sensitive switches may be three or less, or may be five or more.

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

  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> D 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 through the opening of the spacer 30 can come into contact with each other, so that the pressure-sensitive switch can be appropriately turned on and the seating can be detected appropriately. can do. 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.

  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 34D of the spacer 30 via the first insulating sheet 11, and the cushion member 52 covers at least the openings 34A to 34D 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.

  Moreover, in the said embodiment, although it was set as the structure by which the pressure sensitive switches 40A-40D were connected in series, this invention is not restricted to this, For example, by changing wiring, it is OR by pressure sensitive switch 40A, 40B. A circuit is formed, and an OR circuit is formed by the pressure sensitive switches 40C and 40D. Further, an AND circuit includes a pressure sensitive switch group including the pressure sensitive switches 40A and 40B and a pressure sensitive switch group including the pressure sensitive switches 40C and 40D. And an AND-OR circuit may be formed as a whole. Alternatively, an OR circuit may be formed by all of the pressure sensitive switches 40A to 40D.

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

  ADVANTAGE OF THE INVENTION According to this invention, the seating sensor which can prevent position shift, and a seat apparatus using the same are provided, preventing the discomfort by a seating sensor.

DESCRIPTION OF SYMBOLS 1, 2 ... Seating sensor 9 ... Seat apparatus 10 ... 1st electrode sheet 11 ... 1st insulating sheet 11G ... Tail site | part 14A-14D ... 1st electrode 16A-16E ... -1st wiring 20 ... 2nd electrode sheet 21 ... 2nd insulating sheet 24A-24D ... 2nd electrode 26A, 26B ... 2nd wiring 30 ... Spacer 34A-34D ... opening 36A to 36D ... slit 40A to 40D ... pressure sensitive switch 42A, 42B ... terminal 51, 52 ... cushion member 60 ... fitting member 61 ... fitting convex part 62 ... Hook 63 ... Hook 64 ... Curved surface 92 ... Seat pan 93 ... Cushion pad 94A, 94B ... Hole 96 ... Backrest

Claims (7)

A seating sensor disposed on a seat pan in which a hole is formed,
At least one pressure sensitive switch;
An insulating sheet provided with the pressure sensitive switch;
A fitting member that is provided on the insulating sheet and has a fitting convex portion that fits into the hole of the sheet pan,
A seating sensor comprising:   The seating sensor according to claim 1, wherein a snap hook that engages with the seat pan is formed on the fitting convex portion.   The part of the fitting member is fixed to a part of the surface of the insulating sheet on the side opposite to the surface on which the fitting convex portion protrudes. The seating sensor described.   The seating sensor according to any one of claims 1 to 3, wherein an outer shape of the fitting convex portion is non-circular when viewed from a convex direction of the fitting convex portion.   The seating sensor according to claim 1, comprising a plurality of the fitting members.   The seating according to any one of claims 1 to 5, wherein the fitting member is made of a resin mainly composed of any one of polybutylene terephthalate, polyamide, and polypropylene, or a mixture thereof. Sensor. A sheet pan in which holes are formed;
A cushion pad disposed on the seat pan;
The seating sensor according to any one of claims 1 to 6, which is disposed between the seat pan and the cushion pad,
With
The seating device according to claim 1, wherein the fitting convex portion of the seating sensor is fitted into the hole of the seat pan.