JP2014210554A - Seat device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seat device capable of properly detecting seating.SOLUTION: A seat device 5 includes: a plurality of springs 73 arranged side by side in an opening of a frame and stretched; a cushion pad 60 placed on the plurality of springs 73; a member 80 not moving interlockingly with displacement of the cushion pad caused by seating; and a first pressure-sensitive switch SW1 and a second pressure-sensitive switch SW2 supported by the member 80. The first pressure-sensitive switch SW1 and the second pressure-sensitive switch SW2 are supported in a state that they approach each other below the cushion pad 60 with a gap to a cushion pad lower face. The first pressure-sensitive switch SW1 turns on when a weight not less than a first weight is applied from a seat surface side of the cushion pad 60, and the second pressure-sensitive switch SW2 turns on when a weight not less than a second weight larger than the first weight is applied from the seat surface side of the cushion pad 60.

Description

  The present invention relates to a seat device, and is suitable in the technical field of detecting seating of a seat in a vehicle or the like.

  As one of safety systems in vehicles, an alarm system for warning that a seat belt is not worn when riding is put into practical use. In this alarm system, a warning is issued when seat belt wearing is not detected in the state where seating of a person is detected. Patent Document 1 below has been proposed as a seating sensor used in such an alarm system.

  The seating sensor disclosed in Patent Document 1 includes a membrane switch having a detection unit disposed below a cushion pad, a holder having a pressure receiving unit supported by an S spring and disposed below the detection unit, a detection unit, And a spacer interposed between the pressure receiving portions.

  The detection part of the membrane switch includes an upper film and a lower film, and a separation holding part arranged between the upper film and the lower film, and the contacts arranged on each film by the pressing of the cushion pad are separation holding parts. It is the structure which contacts via.

JP2011-105278A

  However, since the upper film constituting the detection unit in Patent Document 1 is in contact with the lower surface of the cushion pad, for example, even when an object is placed on the cushion pad, the contacts are likely to come into contact with each other and have a high tendency to misdetect. There was a problem.

  Accordingly, an object of the present invention is to provide a seat device that can detect seating appropriately.

  As a result of intensive studies to solve the above problems, the present inventor has clarified another cause that the seating sensor of Patent Document 1 cannot properly detect the seating. That is, when the seating sensor is supported by the spring, even if the cushion pad is displaced downward by pressing, the spring is displaced downward in the same manner as the cushion pad. The position is almost unchanged. Because of this, even if a person is seated on the cushion pad, even if something other than a person is placed on the cushion pad, the possibility that the contacts of the seating sensor will come into contact with each other increases. There was not enough separation between things. Recently, there is a demand to separate people with different weights.

  Therefore, as a result of further earnest studies, the present inventor has reached the present invention capable of solving the above problems.

  The present invention relates to a seat device, wherein a plurality of springs arranged side by side in an opening of a frame, a cushion pad placed on the plurality of springs, and displacement of the cushion pad due to seating And a first pressure-sensitive switch and a second pressure-sensitive switch supported by the member, wherein the first pressure-sensitive switch and the second pressure-sensitive switch are cushions. When the first pressure sensitive switch is applied with a first weight or more from the seat surface side of the cushion pad, it is supported in a state of being close to each other below the cushion pad with a gap from the pad lower surface. The second pressure-sensitive switch is turned on when a second weight or more greater than the first weight is applied from the seating surface side of the cushion pad.

In such a seat device, since the pressure sensitive switch is supported by a member that does not move in conjunction with the displacement of the cushion pad due to the seating, even if the cushion pad is displaced, the position of the pressure sensitive switch is not displaced.
By the way, when an object lighter than a person is placed, the cushion pad is hardly displaced, but when the person is seated, the displacement of the cushion pad is large. A pressure sensitive switch is arranged below the cushion pad where such displacement occurs, with a gap from the lower surface of the cushion pad.
For this reason, when an object is placed on the cushion pad, the cushion pad hardly displaces, and it is possible to suppress erroneous detection due to the pressure-sensitive switch being turned on. On the other hand, when a person is seated, the cushion pad is displaced, so the relative position of the cushion pad and the pressure sensitive switch changes, the pressure sensitive switch and the cushion pad come into contact, and the pressure sensitive switch is turned on. . Therefore, the person and the object can be separated.
Furthermore, the first pressure-sensitive switch is turned on when a first weight or more is applied from the seating surface side of the cushion pad, and the second pressure-sensitive switch is turned on from the first weight from the seating surface side of the cushion pad. Is turned on when a large second weight or more is applied.
For this reason, there are two differences in the weight applied to the cushion pad: when only the first pressure sensitive switch is turned on and when both the first pressure sensitive switch and the second pressure sensitive switch are turned on. Can be obtained at Therefore, it becomes possible to separate persons having different weights.
Thus, a seat device that can appropriately detect the seating is realized.

  Further, the sensitivity of the first pressure-sensitive switch has a higher relationship than the sensitivity of the second pressure-sensitive switch, and the first pressure-sensitive switch is turned on by having the relationship. It is preferable that the second weight at which the second pressure sensitive switch is turned on is larger than the weight of the second weight.

  In this case, it is possible to separate persons and objects or persons with different weights without changing the cushion pad.

  The first pressure-sensitive switch and the second pressure-sensitive switch include a first insulating sheet having flexibility and a lower surface of the cushion pad than the first insulating sheet having flexibility. On the surface of each of the first insulating sheet and the second insulating sheet, a sheet-like spacer that is interposed between the first insulating sheet and the second insulating sheet and that has an opening. And the pair of electrodes facing each other through the opening of the spacer, wherein the opening formed in the spacer in the first pressure sensitive switch is the spacer in the second pressure sensitive switch. The opening has a larger relationship than that of the opening, and by having the relationship, the sensitivity of the first pressure sensitive switch is higher than the sensitivity of the second pressure sensitive switch. Masui.

  In this case, it is possible to separate people and objects or people with different weights without changing the insulating sheet.

  Further, the shortest distance from the lower surface of the cushion pad to the first pressure-sensitive switch has a smaller relationship than the shortest distance from the lower surface of the cushion pad to the second pressure-sensitive switch. The second weight at which the second pressure sensitive switch is turned on is preferably larger than the first weight at which the first pressure sensitive switch is turned on.

  In this case, since the weight applied from the cushion pad can be directly received compared to the case where the sensitivity of the pressure sensitive switch is different, the person and the object or the person with different weights can be separated according to the difference in sensitivity. Compared to the case, the accuracy can be easily increased.

  In addition, the thickness of the first pressure sensitive switch has a relationship larger than the thickness of the second pressure sensitive switch, and by having the relationship, the first pressure sensitive switch from the lower surface of the cushion pad. The shortest distance is preferably smaller than the shortest distance from the lower surface of the cushion pad to the second pressure sensitive switch.

  In this case, a person and a person having different weights can be separated from each other without separately providing a member for making the shortest distance different.

  Further, a reinforcing member that is provided between the first pressure-sensitive switch and the second pressure-sensitive switch and a cushion pad portion that these pressure-sensitive switches are opposed to and has a rigidity greater than the rigidity of the cushion pad is further provided. It is preferable that the reinforcing member is interlocked with the displacement of the cushion pad.

  When such a reinforcing member is provided, even when the lower surface of the cushion pad hangs down due to aging of the cushion pad, the cushion pad portion facing the reinforcing member can be prevented from hanging down below the reinforcing member. Therefore, it can suppress that the isolation | separation precision of the person from which a person and a thing or a body weight differ due to the cushion pad lower surface hanging down falls. In addition to this, even when the cushion pad bottom surface has irregularities, it is possible to suppress a reduction in the accuracy of separation between persons and objects or persons with different weights due to the irregularities.

  As described above, according to the present invention, it is possible to realize a seat device that can detect seating appropriately.

It is an exploded view which shows the structure of the seating sensor used for a seat apparatus. It is a figure which shows the external appearance and the mode of a cross section of a seating sensor. It is a figure which shows v of a seating sensor. It is a figure which shows a mode that the seat apparatus of 1st Embodiment was seen from the diagonal direction. It is a figure which shows the mode of the seating sensor arrange | positioned at a sensor mounting base. It is a figure which shows the mode of the cross section along the XX line of FIG. It is a figure which shows distribution of the load which a cushion pad lower surface receives. It is a figure which shows a mode when a person sits on a seat apparatus from the same viewpoint as FIG. It is a figure which shows the measurement state and measurement result of the displacement amount in a cushion pad lower surface and a spring lower part when a person sits on a cushion pad. It is a figure which shows a mode that a 1st pressure sensitive switch turns on in the cross section along the YY line of FIG. It is a figure which shows the seat apparatus in 2nd Embodiment from the same viewpoint as FIG. It is a figure which shows the cross section of the 1st pressure sensitive switch and 2nd pressure sensitive switch in 2nd Embodiment. It is a figure which shows the seat apparatus provided with the reinforcement member from the same viewpoint as FIG. It is a figure which shows the structure of the sensor mounting base in other embodiment. It is a figure which shows the structure of the pressure sensitive switch in other embodiment. It is a figure explaining the relationship between the opening of a spacer, and a cushion member.

(1) First Embodiment A first embodiment for carrying out the present invention will be described in detail with reference to the drawings.

  FIG. 1 is an exploded view showing a configuration of a seating sensor 1 used in a seat device. As shown in FIG. 1, the seating sensor 1 includes a first electrode sheet 10, a second electrode sheet 20, a spacer 30, and a cushion member 40 as main components.

  The first electrode sheet 10 includes a first insulating sheet 11, a plurality of first electrodes 12 </ b> A and 12 </ b> B, terminals 13 </ b> A and 13 </ b> B, and a first wiring 14.

  The first insulating sheet 11 is a flexible film-like insulating sheet, and has a substantially convex shape, for example. In the case of this embodiment, the first insulating sheet 11 includes a first block B1 in which the first electrode 12A is to be disposed, a second block B2 in which the first electrode 12B is to be disposed, and the first block B1 and the second block. It consists of a third block B3 connecting B2 and a fourth block B4 in which the terminals 13A and 13B are to be arranged. The first block B1 and the second block B2 are strip-like blocks parallel to each other. On the other hand, the third block B3 is a belt-like block that connects the ends on the same side in the first block B1 and the second block B2. On the other hand, the fourth block B4 is a belt-like block protruding from a side portion of a substantially intermediate portion in the longitudinal direction of the third block B3.

  Examples of the material of the first insulating sheet 11 include resins such as polyethylene terephthalate (PET), polybutylene terephthalate (PBT), and polyethylene naphthalate (PEN).

  The first electrodes 12A and 12B are conductor layers, and are, for example, substantially circular metal printing layers. The first electrode 12A is disposed on one surface of the first block B1, and the first electrode 12B is disposed on the surface of the second block B2 on the same side as the surface on which the first electrode 12A is disposed. In the present embodiment, the first electrode 12A and the first electrode 12B are arranged in the same straight line, and the first electrode 12A is electrically connected to the terminal 13A via the first wiring 14, and the first electrode 12B is electrically connected to the terminal 13B via the first wiring 15. In addition, the first electrode 12A and the second electrode 12B are insulated. Specifically, each of the first electrode 12A, the first wiring 14, and the terminal 13A is insulated from each of the second electrode 12B, the first wiring 15, and the terminal 13B.

  The terminals 13A and 13B are conductor layers and are, for example, substantially rectangular metal sheets. Further, the terminals 13A and 13B are disposed on the surface of the fourth block B4 on the same side as the surface on which the first electrode 12 is disposed, and are electrically connected to the vehicle electrical components via a wiring (not shown). The

  The second electrode sheet 20 includes a second insulating sheet 21, a plurality of second electrodes 22 </ b> A and 22 </ b> B, a terminal 13 </ b> B, a second wiring 24, and a resistor 26.

  The second insulating sheet 21 is a flexible film-like insulating sheet, and has a substantially convex shape, for example. In the case of this embodiment, the second insulating sheet 21 includes a first block B11 in which the second electrode 22A is to be disposed, a second block B12 in which the second electrode 22B is to be disposed, and the first block B11 and the second block. It consists of a third block B13 that connects B12s and a fourth block B14 that is connected to the third block B13. The first block B11 to the third block B13 have the same shape and size as the corresponding first blocks B1 to B3 of the first insulating sheet 11. The fourth block B14 is smaller than the corresponding fourth block B4 of the first insulating sheet 11, and the length of the fourth block B14 is shorter than the length of the fourth block B4. The connection position of the fourth block B14 with respect to the third block B13 is a position relatively different from the connection position of the fourth block B4 with respect to the third block B3 in the first insulating sheet 11.

  As the material of the second insulating sheet 21, like the first insulating sheet 11, a resin such as PET, PBT, or PEN can be used. The material of the second insulating sheet 21 may be the same as or different from the material of the first insulating sheet 11.

  The second electrodes 22A and 22B are conductor layers, for example, substantially circular metal printing layers. The second electrode 22A is disposed on the surface of the first block B11, and the second electrode 22B is disposed on the surface of the second block B12 on the same side as the surface on which the first electrode 22A is disposed. In the present embodiment, the size of the second electrodes 22A and 22B is the same as that of the first electrodes 12A and 12B. The arrangement position of the second electrode 22A with respect to the first block B11 and the arrangement position of the first electrode 12A with respect to the first block B1 are relatively the same position, and the arrangement position of the second electrode 22B with respect to the second block B12 The arrangement position of the first electrode 12B with respect to the second block B1 is relatively the same position. The second electrode 22A and the second electrode 22B are electrically connected to the terminal 13B via the second wiring 24.

  The resistor 26 is a conductor layer, for example, a substantially rectangular parallelepiped metal layer. The resistor 26 is disposed over the fourth block B14 and the third block B13 on the same side as the surface on which the second electrodes 22A and 22B are disposed, and is electrically connected to the first wiring 15 in the first insulating sheet 11. Connected.

The spacer 30 is a film-like insulating sheet and has openings 31A and 31B. In the case of this embodiment, the spacer 30 is the first block B1 to B3 in the first insulating sheet 11.
The same shape and size. Examples of the material of the spacer 30 include resins such as PET, PBT, and PEN, as in the first insulating sheet 11 and the second insulating sheet 21. The material of the spacer 30 may be the same as or different from the material of the first insulating sheet 11 or the second insulating sheet 21.

  The peripheral shapes of the openings 31A and 31B are, for example, substantially circular, and the diameters of the openings 31A and 31B are slightly smaller than the diameters of the first electrode 12 and the second electrode 22. The diameter of the opening 31A is made larger than the diameter of the opening 31B. In addition, the arrangement positions of the openings 31A and 31B are relatively the same positions as the arrangement positions of the first electrodes 22A and 22B with respect to the second insulating sheet 21.

  In the openings 31A and 31B, slits 32A and 32B that are spatially connected to the outside of the spacer 30 are formed. That is, one end of the slits 32 </ b> A and 32 </ b> B is connected to the corresponding opening 31 </ b> A and 31 </ b> B, and the other end is opened to the side of the spacer 30.

  The cushion member 40 is an elastic member that deforms so as to be crushed when pressure is applied, and is formed of, for example, a sponge-like resin provided with a large number of pores, a nonwoven fabric in which resin fibers are intertwined, rubber, or the like. . In the present embodiment, the cushion member 40 has a substantially rectangular parallelepiped shape, and the wide surface thereof is the same as the wide surface of the first block B1 of the first insulating sheet 11.

  FIG. 2 is a diagram illustrating an appearance and a cross-sectional state of the seating sensor 1. Specifically, FIG. 2A is a view showing the seating sensor 1 as viewed from above, and FIG. 2B is a cross-sectional view taken along the line WW in FIG. It is a figure which shows a mode.

  As shown in FIG. 2B, the first electrode sheet 10 is attached to one surface of the spacer 30, and the second electrode sheet 20 is attached to the other surface of the spacer 30. And the cushion member 40 is affixed on the reverse side of the surface facing the spacer 30 in the 1st insulating sheet 11, and the seating sensor 1 is comprised.

  In the seating sensor 1, a part of a pair of insulating sheets 11 and 21, a spacer part interposed between the sheet parts, and a pair of electrodes 12A and 22A facing each other through an opening 31A provided in the spacer part. A first pressure sensitive switch SW1 is configured. The part of the insulating sheets 11 and 21 is a part where at least an electrode is disposed.

  In the seating sensor 1, the second pressure sensitive switch SW2 shown in FIG. 3A is configured in the same manner as the first pressure sensitive switch SW1. Insulating sheets and spacers that are constituent elements of the first pressure sensitive switch SW1 and the second pressure sensitive switch SW2 are part of one insulating sheet 11, 21 and spacer 30 in the present embodiment. A separate insulating sheet and spacer may be connected to each part by a predetermined connector.

  Incidentally, as described above, the opening 31A formed in the spacer 30 in the first pressure-sensitive switch SW1 has a larger relationship than the opening 31B formed in the spacer 30 in the second pressure-sensitive switch SW2. . In the present embodiment, by having this relationship, the sensitivity of the first pressure sensitive switch SW1 is higher than the sensitivity of the second pressure sensitive switch SW2.

  Sensitivity means the degree of sensing pressure. That is, the sensitivity of the first pressure-sensitive switch SW1 itself is higher than the sensitivity of the second pressure-sensitive switch SW2 itself, and the first pressure-sensitive switch SW1 is first than the second pressure-sensitive switch SW2. The electrode 12 and the second electrode 22 are easy to contact.

  FIG. 3 is a diagram showing an equivalent circuit of the seating sensor 1. As shown in FIG. 3, the pressure sensitive switch SW1 is electrically connected to one terminal 13A, and the pressure sensitive switch SW2 and the resistor 26 are connected in parallel to the pressure sensitive switch SW1 and the other terminal 13B. Is done. The resistor 26 is provided on the second insulating sheet 21 (FIG. 1), but is always electrically connected via the terminal 13B and the first wiring 15 provided on the first insulating sheet 11 (FIG. 1). Has been.

  Next, the seat apparatus 5 provided with the above-mentioned seating sensor 1 is demonstrated. FIG. 4 is a diagram illustrating a state in which the seat device 5 according to the first embodiment is viewed from an oblique direction. In FIG. 4, for convenience, the seating sensor 1 is shown as a substantially rectangular parallelepiped.

  As shown in FIG. 4, the seat device 5 includes a cushion pad 60, a cushion mounting unit 70, a sensor mounting table 80, and the above-described seating sensor 1 as main components.

  The cushion pad 60 is a member to be seated, and is an elastic member that deforms so as to be crushed when pressure is applied. Examples of such an elastic member material include urethane foam. In the case of this embodiment, a backrest member 61 is connected to the rear end portion of the cushion pad 60.

  The cushion mounting unit 70 includes a gantry 71, a support frame 72, and a plurality of springs 73. The pedestal 71 is a base member that serves as a base for supporting the cushion pad 60, and has a rigidity that does not cause deformation due to pressure applied to the cushion pad 60 due to the seating of a person.

  In the case of the present embodiment, the left foundation leg 71A and the right foundation leg 71B arranged in parallel to each other, the left front leg 71C and the left rear leg 71D standing on the left foundation leg 71A, and the right foundation The pedestal 71 is constituted by the right front leg 71E and the right rear leg 71F standing on the leg 71B. Examples of the material of the leg portions 71A to 71F include metal or ceramic.

  The support frame 72 is a frame member that supports the plurality of springs 73 and is fixed to the gantry 71. Further, like the pedestal 71, the support frame 72 has a rigidity that does not cause deformation due to the pressure applied to the cushion pad 60 due to the seating of a person.

  In the case of the present embodiment, the support frame 72 is configured by the front frame 72A, the rear frame 72B, the left frame 72C, and the right frame 72D, and these frames 72A to 72D are the left front leg 71C, the left rear leg 71D, and the right front leg 71E. And it fixes to the upper end of each right rear leg part 71F.

  Examples of the material of each of the frames 72A to 72D include metal or ceramic. The material of each of the frames 72A to 72D may be the same as or different from the material of the leg portions 71A to 71F. Moreover, each frame 72A-72D may be shape | molded integrally with leg part 71A-71F.

  The plurality of springs 73 are members on which the cushion pad 60 is placed, and are arranged and stretched over the opening of the support frame 72.

  In the case of this embodiment, each spring 73 is a metal member that repeatedly bends in an S shape on the same surface, and its cross-sectional shape is, for example, a circle. The front ends of the springs 73 are attached to the front frame 72A, and the rear ends are attached to the rear frame 72B. Thus, the plurality of springs 73 are stretched over the opening surface at the upper end of the frame of the support frame 72 along the front-rear direction of the cushion pad 60 at a predetermined interval, and are configured as a mat for the cushion pad 60.

  The sensor mounting table 80 is a member for mounting at least the pressure-sensitive switch portion of the seating sensor 1 and has a rigidity that does not cause deformation due to pressure applied to the cushion pad 60 due to human seating.

  In the case of this embodiment, one end of the sensor mounting table 80 is fixed to the side surface of the front frame 72A, and the other end is an open end, and the sensor mounting table 80 is disposed in front of the frame below the spring bottom. The

  Examples of the material of the sensor mounting table 80 include metal or resin. The material of the sensor mounting table 80 may be the same as or different from the material of the mount 71 or the support frame 72.

  FIG. 5 is a diagram illustrating a state of the seating sensor disposed on the sensor mounting table. In FIG. 5, a part of the seat device 5 as viewed from directly above with the cushion pad 60 omitted is schematically shown. The left side of the drawing corresponds to the front side of the cushion pad 60, and the right side of the drawing shows the cushion pad. This corresponds to the rear side of 60.

  As shown in FIG. 5, in the case of the present embodiment, the first pressure-sensitive switch portion PT <b> 1 and the second pressure-sensitive switch portion PT <b> 2 in the seating sensor 1 are fixed to the sensor mounting table 80. Specifically, for example, the lower surface of the cushion member 40 that is the lowermost member in the first pressure-sensitive switch portion PT1 and the second pressure-sensitive switch portion PT2 is attached to the upper surface of the sensor mounting table 80.

  On the other hand, the terminal portion PT3 in the seating sensor 1 protrudes outward from the sensor mounting table 80, and is in a state of being operable in a direction orthogonal to the seat surface of the terminal portion PT3. The connecting portion PT4 connecting the first pressure-sensitive switch portion PT1 and the second pressure-sensitive switch portion PT2 is not fixed to the sensor mounting table 80, but is attached to the upper surface of the sensor mounting table 80. Opposed. That is, the third block B <b> 3 (FIG. 2) of the first insulating sheet 11 in the seating sensor 1 is opposed to the upper surface of the sensor mounting table 80 without being fixed to the sensor mounting table 80.

  FIG. 6 is a view showing a state of a cross section taken along line XX of FIG. In FIG. 6, for the sake of convenience, the first pressure sensitive switch SW1 and the second pressure sensitive switch SW2 are shown in a rectangular parallelepiped.

  As shown in FIGS. 5 and 6, the first pressure sensitive switch SW <b> 1 and the second pressure sensitive switch SW <b> 2 are disposed below the cushion pad 60 and between the springs 73 adjacent to each other. That is, the first pressure-sensitive switch SW1 and the second pressure-sensitive switch SW2 are arranged at positions where they do not overlap with the springs 73 in the vertical direction of the spring 73 with a gap from the lower surface of the cushion pad. In other words, the arrangement position of the first pressure-sensitive switch SW1 and the second pressure-sensitive switch SW2 and the arrangement position of the spring 73 are different in the height direction of the seat device 5, and when the spring 73 is viewed from directly above. Are in an independent state without overlapping each other.

  FIG. 7 is a diagram showing a distribution of loads received on the lower surface of the cushion pad. In FIG. 7, the left side of the paper surface corresponds to the front side of the cushion pad 60, and the right side of the paper surface corresponds to the rear side of the cushion pad 60.

  As shown in FIG. 7, the load received by the lower surface of the cushion pad when a person is seated normally is greater at the hip point HP and the front than the hip point compared to the rear. Note that “regular seating” means sitting with the buttocks positioned deep in the seating surface and the back contacting the backrest. In addition, the “hip point” means a part that protrudes to the lowermost side in the buttocks.

  In addition, the distribution of the load received by the lower surface of the cushion pad when a person is seated normally is roughly divided into three stages: a first region MG1, a second region MG2, and a third region MG3. The first region MG1 has a ratio of 90% or more with respect to the load of the portion, based on the largest portion (hereinafter referred to as the maximum load portion) among the loads that the lower surface of the cushion pad receives when a person is normally seated. It becomes the area to the part which is. On the other hand, the second region MG2 is a region up to a portion where the ratio with respect to the maximum load portion is 80% or more and less than 90% with reference to the maximum load portion. On the other hand, the third region MG3 is a region up to a portion where the ratio with respect to the maximum load portion is 10% or more and less than 80% with reference to the maximum load portion. The first region MG1 and the second region MG2 generally correspond to the central region of the cushion pad seating surface.

  In the case of the present embodiment, the first pressure sensitive switch SW1 and the second pressure sensitive switch SW2 are arranged close to each other so as to receive the same pressure from the lower surface of the cushion pad to which such a load is applied.

  In other words, when viewed in relation to the load applied to the lower surface of the cushion pad, a gap is formed below the spring 73 in the vertical direction in a region where the load difference from the focused region on the lower surface of the cushion pad is 20% or less. The first switch terminal 92B and the second switch terminal 92C are opposed to each other. The spring 73 supporting the cushion pad 60 is displaced downward together with the cushion pad 60 as a whole because the load is supported by the whole spring. For this reason, any area | region of the above-mentioned 1st area | region MG1-3rd area | region MG3 may be sufficient if it is an area | region where the load difference with the site | part to which it pays attention on a cushion pad lower surface is 20% or less.

  Further, when viewed in relation to the springs 73 adjacent to each other, the first pressure-sensitive switch SW1 and the second pressure-sensitive sensor are arranged between the springs 73 on a straight line perpendicular to the central axis of the spring 73. The switches SW2 are arranged side by side without contacting each other. Further, when viewed in relation to the opening of the pressure-sensitive switch, the opening 31A (FIG. 1) of the first pressure-sensitive switch SW1 is larger than the opening 31B (FIG. 1) of the second pressure-sensitive switch SW2. The first pressure-sensitive switch SW1 and the second pressure-sensitive switch SW2 are arranged with an interval equal to or less than a value obtained by multiplying the diameter by five.

  FIG. 8 is a diagram illustrating a situation when a person is seated on the seat device 5 from the same viewpoint as FIG. 5. As shown in FIG. 8, when a person sits on the cushion pad 60, weight is applied to the seating surface of the cushion pad 60, and thus pressure is generated from the seating surface on the cushion pad 60.

  This pressure is transmitted to the lower side of the cushion pad 60, and the lower surface of the cushion pad and the spring bottom are displaced so as to fall as a whole, and become lower from the position (shown by a broken line) when not sitting.

  In the case of this embodiment, since the first pressure-sensitive switch SW1 and the second pressure-sensitive switch SW2 arranged on the sensor mounting table 80 are close to each other, the first pressure-sensitive switch SW1 and the second pressure-sensitive switch SW2 are in close proximity. The pressure applied from the cushion pad 60 to the pressure switch SW2 is approximately equal.

  FIG. 9 is a diagram illustrating measurement states and measurement results of displacements on the cushion pad lower surface and the spring bottom when a person is seated on the cushion pad 60. Specifically, FIG. 9A is a cross-sectional view showing a measurement state of displacement on the cushion pad lower surface and the spring bottom, and FIG. 9B is a graph showing displacement amounts on the cushion pad lower surface and the spring bottom.

  As shown in FIG. 9A, the displacement at the lower surface of the cushion pad and the spring bottom was measured using a laser displacement meter LDM disposed in front of the hip point and below the spring bottom.

  As shown in FIG. 9B, when a person is seated on the cushion pad 60, the lower surface and the spring bottom of the cushion pad are more in the left-right direction of the cushion pad 60 than when the load is placed on the cushion pad 60. It turned out that it displaced greatly to the edge part.

  The horizontal axis in FIG. 9B is closer to the center in the left-right direction (width direction) of the cushion pad 60 as it goes to the right side of the page, and at the end of the cushion pad 60 in the left-right direction as it goes to the left side of the page. It means approaching.

  FIG. 10 is a diagram illustrating a state in which the first pressure-sensitive switch SW1 is turned on in a cross section taken along line YY in FIG. As shown in FIG. 10, when a person sits on the cushion pad 60 of the seat device 5 of the present embodiment, pressure is applied to the first pressure-sensitive switch SW1 from both the cushion pad side and the sensor mounting table side (see arrows). ).

  On the cushion pad side, the lower surface of the cushion pad is bent, and the second insulating sheet 21 of the first pressure-sensitive switch SW1 is pressed downward.

  On the other hand, on the sensor mounting table side, the position of the first pressure-sensitive switch SW1 supported by the support frame 72 through the sensor mounting table 80 is maintained. And since the sensor mounting base 80 has rigidity more than the level which does not deform | transform by the pressure added to the cushion pad 60 resulting from a person's seating, it does not bend. However, since the cushion member 40 is affixed to the lower side of the first insulating sheet 11 of the first pressure sensitive switch SW1, the cushion member 40 bends regardless of the degree of rigidity of the sensor mounting table 80. The first insulating sheet 11 is pressed upward.

  Since the first insulating sheet 11 and the second insulating sheet 21 pressed in this manner have flexibility, they bend so as to enter the opening 31 of the spacer 30. By bending in this way, the first electrode 12 and the second electrode 22 facing each other through the opening 31A come into contact with each other. Thus, the first pressure sensitive switch SW1 is turned on.

  A slit 32A (FIG. 1) is formed in the opening 31A of the spacer 30 sandwiched between the first electrode 12 and the second electrode 22 to communicate the opening with the outside.

  For this reason, when the 2nd insulating sheet 21 bends, the air of opening 31A is discharged | emitted through the slit 32A, without staying in an opening. That is, it is avoided that the bending of the first insulating sheet 11 and the second insulating sheet 21 is suppressed by the air in the opening 31A. Therefore, compared with the case where the slit 32A is not formed, the first electrode 12 and the second electrode 22 are easily in contact with each other, and the sensitivity of the first pressure sensitive switch SW1 can be improved.

  The matters described regarding the ON operation of the first pressure sensitive switch SW1 are the same for the second pressure sensitive switch SW2.

  By the way, in this embodiment, the first pressure-sensitive switch SW1 and the pressure-sensitive switch SW2 having different sensitivities are connected to the electronic control unit of the vehicle via terminals 13A and 13B (FIG. 1). As shown in FIG. 3, the pressure sensitive switch SW1 is connected to one terminal 13A, and the pressure sensitive switch SW2 and the resistor 26 are connected in parallel to the pressure sensitive switch SW1 and the other terminal 13B. .

  Therefore, when only the pressure sensitive switch SW1 is turned on, the current flows from the terminal 13A to the pressure sensitive switch SW1, and then flows through the resistor 26 to the terminal 13B. For this reason, the resistance value of this path is increased by the amount passing through the resistor 26. On the other hand, when both the pressure sensitive switches SW1 and SW2 are turned on, the current flows from the terminal 13A through the pressure sensitive switch SW1, and then flows to the terminal 13B through the pressure sensitive switch SW2. For this reason, the resistance value of this path is lowered by the amount not passing through the resistor 26.

  As a result, even if a terminal is not prepared for each of the pressure sensitive switches SW1 and SW2, only the first pressure sensitive switch SW1 is turned on and the first pressure sensitive switch SW1 and the second pressure sensitive switch SW2 are turned on. The difference from when both are turned on can be transmitted to the electronic control unit. In other words, it is possible to distinguish between when a load is placed on the cushion pad 60 and when a person is seated, and when a person with a different weight difference is seated.

  As described above, in the seat device 5 of the present embodiment, the first pressure-sensitive switch SW1 and the second pressure-sensitive switch SW2 are supported by the support frame 72 that does not move in conjunction with the displacement of the cushion pad caused by the seating. Yes. For this reason, even if the cushion pad 60 is displaced, the first pressure sensitive switch SW1 and the second pressure sensitive switch SW2 are not displaced.

  On the other hand, when the weight of a person or the like is applied to the cushion pad 60 from the seat surface side, the cushion pad lower surface and the spring bottom in front of the hip point are displaced so as to fall as a whole, and lower from the position when not sitting. . The amount of displacement differs greatly between when a person is seated and when a lighter object is placed.

  That is, when a person is seated, the cushion pad 60 is largely displaced downward as a whole, and the relative positions of the first pressure sensitive switch SW1 and the second pressure sensitive switch SW2 change. In this case, the first pressure sensitive switch SW1 and the second pressure sensitive switch SW2 are pressed by the cushion pad 60 and turned on. On the other hand, when an object is placed on the cushion pad, the cushion pad 60 is hardly displaced, and the amount of change in the relative position with respect to the first pressure sensitive switch SW1 and the second pressure sensitive switch SW2 is also small. It is possible to suppress erroneous detection by turning on the pressure sensitive switch SW1 and the second pressure sensitive switch SW2. Therefore, the person and the object can be separated.

  Further, in the seat device 5 of the present embodiment, the first pressure sensitive switch SW1 and the second pressure sensitive switch SW2 are arranged in a state of being close to each other below the cushion pad with a gap from the lower surface of the cushion pad. Further, the sensitivity of the first pressure sensitive switch has a higher relationship than the sensitivity of the second pressure sensitive switch SW2.

  For this reason, in the seat device 5 of the present embodiment, the difference in weight applied to the cushion pad 60 is different from the case where only the first pressure-sensitive switch SW1 is turned on and the first pressure-sensitive switch SW1 and the second pressure-sensitive switch. It can be obtained in two patterns when both switches SW2 are turned on. Therefore, it becomes possible to separate persons having different weights. Thus, the seat device 5 that can appropriately detect the seating is realized.

  When the first pressure sensitive switch SW1 and the second pressure sensitive switch SW2 are not in the proximity state, the sensitivity of the first pressure sensitive switch SW1 is higher than the sensitivity of the second pressure sensitive switch SW2. It becomes practically difficult.

  That is, the pressure distribution generated in the cushion pad 60 differs for each product such as a vehicle type or a company. Therefore, when the first pressure-sensitive switch SW1 and the second pressure-sensitive switch SW2 are not in the proximity state, the sensitivity of the first pressure-sensitive switch SW1 is set to the second sensitivity for each cushion pad 60 having an individual pressure distribution. It becomes necessary to adjust the degree of higher sensitivity than the pressure sensitive switch SW2 with high accuracy.

  For this reason, bringing the first pressure-sensitive switch SW1 and the second pressure-sensitive switch SW2 close to each other increases the sensitivity of the first pressure-sensitive switch SW1 with respect to the cushion pad 60 having individual pressure distributions. This is useful in terms of making it higher than the sensitivity of the second pressure sensitive switch SW2.

  By the way, in the case of this embodiment, 1st pressure sensitive switch SW1 and 2nd pressure sensitive switch SW2 are arrange | positioned in the position which does not overlap with those springs 73 in the perpendicular direction of each spring 73. FIG.

  For this reason, it is possible to prevent the pressure sensitive switch SW1 from being pressed by the spring 73 having higher rigidity than the cushion pad 60, and as a result, it is possible to improve the durability of the pressure sensitive switch SW1.

  In the case of this embodiment, the first pressure-sensitive switch SW1 and the second pressure-sensitive switch SW2 are disposed below the plurality of springs 73 on the lower side of the lower surface of the cushion pad.

  For this reason, compared with the case where a pressure-sensitive switch is arrange | positioned on the same surface as the spring 73, or the case where a pressure-sensitive switch is arrange | positioned between the cushion pad lower surface and the some spring 73, a thing lighter than a person is placed. It is possible to reduce erroneous detection of the pressure sensitive switch SW1 or SW2 due to the fact.

(2) Second Embodiment Next, a second embodiment for carrying out the present invention will be described in detail with reference to the drawings. However, among the constituent elements of the seat device in the second embodiment, constituent elements that are the same as or equivalent to those in the first embodiment are given the same reference numerals, and redundant descriptions are omitted as appropriate.

  FIG. 11 is a diagram illustrating the seat device according to the second embodiment from the same viewpoint as FIG. 6. In FIG. 11, the first pressure sensitive switch SW11 and the second pressure sensitive switch SW12 are shown in a rectangular parallelepiped as in FIG.

  As shown in FIG. 11, the seat device according to the present embodiment has a first pressure sensitive switch SW11 and a second sensitive feeling instead of the first pressure sensitive switch SW1 and the second pressure sensitive switch SW2 according to the first embodiment. The seat device 5 is different from the seat device 5 of the first embodiment in that the pressure switch SW12 is provided.

  Specifically, in the first embodiment, the sensitivity of the first pressure-sensitive switch SW1 is higher than the sensitivity of the second pressure-sensitive switch SW2, whereas in the present embodiment, the first pressure-sensitive switch SW1 has a higher relationship. The sensitivity of the switch SW11 and the sensitivity of the second pressure sensitive switch SW12 have the same degree of relationship.

  On the other hand, in the first embodiment, the shortest distance from the lower surface of the cushion pad to the first pressure-sensitive switch SW1 and the shortest distance from the lower surface of the cushion pad to the second pressure-sensitive switch SW2 have the same relationship. . In contrast, in the present embodiment, the shortest distance D1 from the lower surface of the cushion pad to the first pressure-sensitive switch SW11 has a smaller relationship than the shortest distance D2 from the lower surface of the cushion pad to the second pressure-sensitive switch SW12. Yes.

  In addition, in the shortest distance D1 or D2, it can also be called the linear distance from the cushion pad lower surface toward the vertical direction of the cushion pad lower surface to the pressure sensitive switch SW1 or SW2.

  FIG. 12 is a view showing a cross section of the first pressure-sensitive switch SW11 and the second pressure-sensitive switch SW12 in the second embodiment from the same viewpoint as FIG. Specifically, FIG. 12A shows a cross section of the first pressure sensitive switch SW11, and FIG. 12B shows a cross section of the second pressure sensitive switch SW12.

  As shown in FIG. 12, the thickness T1 of the cushion member 41 constituting the first pressure sensitive switch SW11 has a relationship larger than the thickness T2 of the cushion member 42 constituting the second pressure sensitive switch SW12. By having such a relationship, the above shortest distance D1 is smaller than the shortest distance D2.

  In addition, when the thickness of the cushion member 41 and the cushion member 42 is different, the sensitivity of the first pressure-sensitive switch SW11 and the sensitivity of the second pressure-sensitive switch SW12 are substantially different. The hardness or the like of the cushion member 41 or 42 is appropriately adjusted.

  As described above, the sensitivity of the first pressure-sensitive switch SW11 and the sensitivity of the second pressure-sensitive switch SW12 are approximately the same, and the shortest distance D1 is smaller than the shortest distance D2. In addition, the difference in weight applied to the cushion pad 60 can be obtained in two patterns. Therefore, as in the first embodiment, it is possible to separate persons and persons having different objects or weights.

  When the first pressure sensitive switch SW11 and the second pressure sensitive switch SW12 are not in the proximity state, it is substantially the same as in the first embodiment that the shortest distance D1 is made smaller than the shortest distance D2. It becomes difficult.

  That is, when the first pressure-sensitive switch SW11 and the second pressure-sensitive switch SW12 are not in the proximity state, for each cushion pad 60 having an individual pressure distribution, the extent that the shortest distance D1 is made smaller than the shortest distance D2. Therefore, it becomes necessary to adjust with high accuracy.

  For this reason, making the first pressure sensitive switch SW11 and the second pressure sensitive switch SW12 close to each other makes the shortest distance D1 smaller than the shortest distance D2 with respect to the cushion pad 60 having individual pressure distributions. This is useful from a viewpoint.

(3) Other Embodiments The first embodiment and the second embodiment have been described above as an example. However, the present invention is not limited to the above embodiment.

For example, in the first embodiment, since the opening 31A in the first pressure sensitive switch SW1 is larger than the opening 31B in the second pressure sensitive switch SW2, the sensitivity of the first pressure sensitive switch SW1 is the second. It was made higher than the sensitivity of the pressure sensitive switch SW2.
However, the method of making the sensitivity of the first pressure sensitive switch SW1 higher than the sensitivity of the second pressure sensitive switch SW2 is not limited to making the openings 31A and 31B different. For example, the hardness of the first insulating sheet 11, the second insulating sheet 21, the first electrode 12, the second electrode 22, or the spacer 30 is greater in the first pressure sensitive switch SW1 than in the second pressure sensitive switch SW2. It may be a small relationship.
Alternatively, the slit 32A formed in the opening 31A in the first pressure sensitive switch SW1 may be left as it is, and the slit 32B formed in the opening 31B in the second pressure sensitive switch SW2 may be omitted.
In this case, air in the opening is accumulated without being discharged in the opening 31B of the second pressure-sensitive switch SW2, and the bending of the first insulating sheet 11 and the second insulating sheet 21 is suppressed by the air. The sensitivity of the first pressure sensitive switch SW1 is higher than the sensitivity of the second pressure sensitive switch SW2. Therefore, even if an error occurs in the size of the opening 31A or 31B formed at the time of manufacture, the sensitivity of the first pressure sensitive switch SW1 and the sensitivity of the second pressure sensitive switch SW2 are clearly made different. Can do. That is, it is useful in that the sensitivity of the first pressure-sensitive switch SW1 and the sensitivity of the second pressure-sensitive switch SW2 can be made different without being reflected in manufacturing accuracy.

In the second embodiment, the thickness of the cushion member 41 constituting the first pressure-sensitive switch SW11 is set to be larger than the thickness of the cushion member 42 constituting the second pressure-sensitive switch SW12. The distance D1 was made smaller than the shortest distance D2.
However, the method of making the shortest distance D1 smaller than the shortest distance D2 is not limited to making the thicknesses of the cushion member 41 and the cushion member 42 different. For example, instead of the cushion members 41 and 42 or in addition to the cushion members 41 and 42, the first insulating sheet 11, the second insulating sheet 21, the first electrode 12, the second electrode 22, and the spacer 30. Or a plurality of thicknesses may be larger in the first pressure sensitive switch SW1 than in the second pressure sensitive switch SW2. That is, the thickness Tx (FIG. 12) of the first pressure sensitive switch SW11 may be larger than the thickness Ty (FIG. 12) of the second pressure sensitive switch SW12.
Further, an unevenness is formed on the upper surface of the sensor mounting table 80, and the first pressure-sensitive switch SW11 is disposed among the first pressure-sensitive switch SW11 and the second pressure-sensitive switch SW12 having the same thickness. You may make it the shortest distance D1 become smaller than the shortest distance D2 by making a surface lower than the surface where 2nd pressure sensitive switch SW2 is arrange | positioned.

The sensitivity of the first pressure sensitive switch SW1 may be higher than the sensitivity of the second pressure sensitive switch SW2, and the shortest distance D1 may be smaller than the shortest distance D2. In this case, it is possible to further clarify the separation between the person and the person having different objects or weight, compared to the case where only one of the relations is provided.
Further, the first pressure sensitive switch SW1 or SW11 and the second pressure sensitive switch SW2 or SW12 may be independently connected to the electronic control unit of the vehicle, or may be connected in parallel. However, in the case of parallel connection, the first and second electrode sheets of the first pressure sensitive switch SW1 or SW11 are made of a high resistance material or the like, and the first pressure sensitive switch SW1 or SW11 is turned on. Is required to be higher than when the second pressure sensitive switch SW2 or SW12 is turned on.
In short, when the first weight or more is applied from the seating surface side of the cushion pad 60, the first pressure-sensitive switch is turned on, and the second greater than the first weight from the seating surface side of the cushion pad 60 is applied. It is sufficient that the second pressure-sensitive switch is turned on when a weight of more than is added.

In the second embodiment, no member is provided between the pressure sensitive switches SW11 and SW12 and the cushion pad portion to which the pressure sensitive switch faces.
However, it is preferable that a reinforcing member that interlocks with the displacement of the cushion pad 60 is provided between the pressure sensitive switches SW11 and SW12 and the cushion pad portion that the pressure sensitive switch faces.
Specifically, the example shown in FIG. 13 is mentioned, for example. In this embodiment, the plate-shaped reinforcing member 90 is provided between the first pressure-sensitive switch SW11 and the second pressure-sensitive switch SW12 and the cushion pad portion facing the pressure-sensitive switch and adjacent to the spring 73. It is arranged between. One end of the reinforcing member 90 is fixed to one of the adjacent springs 73, and the other end of the reinforcing member 90 is fixed to the other of the adjacent springs 73.
When such a reinforcing member 90 is provided, even if the cushion pad lower surface hangs down due to the aging of the cushion pad 60, the cushion pad portion facing the reinforcing member 90 is located below the reinforcing member 90. It is possible to prevent the lower surface of the cushion pad from sagging. Therefore, it can suppress that the isolation | separation precision of the person from which a person and a thing or a body weight differ due to the cushion pad lower surface hanging down falls. In addition to this, even when the cushion pad bottom surface has irregularities, it is possible to suppress a reduction in the accuracy of separation between persons and objects or persons with different weights due to the irregularities.
Instead of such a reinforcing member 90, for example, a thin-film reinforcing member that is attached to a cushion pad portion where the first pressure sensitive switch SW11 and the second pressure sensitive switch SW12 face each other may be applied. . However, from the viewpoint of preventing the lower surface of the cushion pad from dropping below the spring 73, it is preferable to apply the reinforcing member 90 as compared to the case where a thin-film reinforcing member is attached.
As a material of such a reinforcing member, any material that is larger than the rigidity of the cushion pad 60 may be used, and a material that is larger than the rigidity is more preferable. Specific examples include metals and resins. The reinforcing member described above can also be applied to the first embodiment.

In the above embodiment, the first pressure sensitive switch SW1 or SW11 and the second pressure sensitive switch SW2 or SW12 are supported by the support frame 72 through the sensor mounting table 80.
However, the support mode for supporting the first pressure sensitive switch SW1 or SW11 and the second pressure sensitive switch SW2 or SW12 is not limited to the above embodiment. For example, a mode in which the support frame 72 and the sensor mounting table 80 are integrally formed to form a support frame and the pressure sensitive switch SW is mounted on the support frame to directly support the sensor mounting table without using the sensor mounting table is applied. Is possible.
Further, instead of the above-described sensor mounting table 80, for example, as shown in FIG. 14, it is fixed to the left frame 72C and the right frame 72D so as to cross the opening in the support frame 72 along the left-right direction of the cushion pad 60. The sensor mounting table 81 can be applied.
In short, it is only necessary that the pressure sensitive switch SW is supported by a member that does not move in conjunction with the displacement of the cushion pad 60 due to the seating.
The sensor mounting table 80 or 81 may be made of a material such as resin, for example, and may have elasticity in the displacement direction of the cushion pad 60. In such a case, when a certain pressing force is applied to the first pressure-sensitive switch SW1 or SW11 and the second pressure-sensitive switch SW2 or SW12, a sensor mounted on which the pressure-sensitive switch is mounted. The stage 80 or 81 moves so as to fall downward. That is, after the pressure-sensitive switch SW1 is turned on according to the pressure applied from the cushion pad 60, the pressure pad is moving in the direction in which the pressure is applied from the cushion pad 60, and interlocked with the displacement of the cushion pad 60 due to the seating. It is not moving. As described above, when the sensor mounting table 80 or 81 is moved in the direction in which the pressure is applied from the cushion pad 60 after the pressure sensitive switch SW1 is turned on in accordance with the pressure applied from the cushion pad 60, an excessive amount Pressure can be prevented from being applied to the pressure sensitive switch SW, and the durability of the pressure sensitive switch SW can be improved.

  In the above embodiment, the first pressure sensitive switch SW1 or SW11 and the second pressure sensitive switch SW2 or SW12 configured to sandwich the pair of electrode sheets 10 and 20 via the spacer 30 are applied. For example, a pressure sensitive switch shown in FIG. 15 may be applied.

  The pressure sensitive switch SW3 shown in FIG. 15 is different from the first pressure sensitive switch SW1 or SW11 and the second pressure sensitive switch SW2 or SW12 only in that the spacer 30 in the above embodiment is changed to a plurality of springs 33. To do. Even when such a pressure sensitive switch SW3 is applied, the same effects as those of the above-described embodiment can be obtained. Note that the pressure-sensitive switch SW3 or a pressure-sensitive switch having a configuration other than the above embodiment may be applied.

  Moreover, in the said embodiment, 1st pressure sensitive switch SW1 or SW11 and 2nd pressure sensitive switch SW2 or SW12 were arrange | positioned below the spring bottom. However, it may not be below the spring bottom as long as it is disposed below the cushion pad 60 with a gap from the lower surface of the cushion pad.

  Moreover, in the said embodiment, although the number of pressure sensitive switches in the seating sensor 1 was two, three or more may be sufficient.

Moreover, in the said 1st Embodiment, although the cushion member 40 was affixed on the lower surface of the 1st insulating sheet 11, the said cushion member 40 may be abbreviate | omitted. On the other hand, in the said 2nd Embodiment, although the cushion member 41 or 42 was affixed on the lower surface of the 1st insulating sheet 11, if the shortest distance D1 has a relationship smaller than the shortest distance D2, the said cushion member 41 or 42 may be omitted.
When the cushion members 40 to 42 are omitted, the seating sensor 1 can be made thinner by that amount. Even if the cushion members 40 to 42 are omitted, the upper side of the seating sensor 1 is pressed, so that the pressure sensitive switch SW is not turned on by omitting the cushion members 40 to 42. However, in terms of the relationship in which the sensitivity of the first pressure sensitive switch SW1 is higher than the sensitivity of the second pressure sensitive switch SW2, or the relationship in which the shortest distance D1 is smaller than the shortest distance D2, etc. 42 is preferred.

  Moreover, in the said embodiment, although the cushion members 40-42 which cover the whole opening 31A or 31B in the spacer 30 via the 1st insulating sheet 11 were applied, as shown, for example in FIG. 16, one of the openings 31A or 31B The cushion member 43 which covers a part may be applied. When such a cushion member 43 is applied in the first embodiment, the first pressure-sensitive pressure is adjusted by adjusting the ratio of the cushion member 43 covering the opening 31A or 31B (the amount of the cushion member closed relative to the opening). A relationship in which the sensitivity of the switch SW1 is higher than the sensitivity of the second pressure-sensitive switch SW2 can also be established.

  Moreover, in the said embodiment, although the shape of the spring 73 was made into S shape, various shapes, such as Z shape, are applicable, for example. In addition, the repetition interval of the bent part of the spring 73 may be continuous, may be every predetermined interval, or may be random. In addition, the shape of the bent portion to be repeated may be the same, and is different, for example, by combining an S-shape and a Z-shape, or by combining shapes obtained by inverting the U-shape or U-shape. May be. Further, the number of repetitions of the bent portion may be omitted, but it is preferable that it is present. The plurality of springs 73 are stretched in the front-rear direction of the cushion pad 60, but may be in the left-right direction or the oblique direction.

  In addition, each component in the seat apparatus 5 is combined, abbreviate | omitted, changed suitably in the range which does not deviate from this-application objective other than the content shown by 1st Embodiment, 2nd Embodiment, and other embodiment mentioned above. A well-known technique can be added.

  The present invention is applicable to a seat of a vehicle such as a vehicle, and is particularly applicable to a seat to which a seat belt is to be worn.

DESCRIPTION OF SYMBOLS 1 ... Seating sensor 5 ... Seat apparatus 10 ... 1st electrode sheet 11 ... 1st insulating sheet 12A, 12B ... 1st electrode 13A, 13B ... Terminal 14 ... 1st Wiring 20 ... second electrode sheet 21 ... second insulating sheet 22A, 22B ... second electrode 24 ... second wiring 30 ... spacer 31A, 31B ... opening 32A, 32B ... · Slits 40 to 43 · · · Cushion member 60 · · · Cushion pad 70 · · · Cushion placement unit 71 · · · Mounting base 72 · · · Support frame 73 · · · Spring 80 · · · Sensor placement table 90 · · ·・ Reinforcing members SW1 to SW3, SW11 to SW12 ... Pressure sensitive switch

Claims (6)

A plurality of springs arranged side by side in the opening of the frame, and
A cushion pad placed on the plurality of springs;
A member that does not move in conjunction with the displacement of the cushion pad due to sitting;
A first pressure sensitive switch and a second pressure sensitive switch supported by the member;
The first pressure sensitive switch and the second pressure sensitive switch are:
The cushion pad is supported in a state of being close to each other below the cushion pad, with a gap from the lower surface of the cushion pad,
The first pressure sensitive switch is:
ON when a first weight or more is applied from the seating surface side of the cushion pad,
The second pressure sensitive switch
The seating device, which is turned on when a second weight or more greater than the first weight is applied from the seating surface side of the cushion pad. The sensitivity of the first pressure-sensitive switch has a higher relationship than the sensitivity of the second pressure-sensitive switch, and the first weight at which the first pressure-sensitive switch is turned on by having the relationship. 2. The seat device according to claim 1, wherein the second weight at which the second pressure-sensitive switch is turned on is larger than the second weight-sensitive switch. The first pressure sensitive switch and the second pressure sensitive switch are:
A first insulating sheet having flexibility, a second insulating sheet having flexibility and disposed closer to the lower surface of the cushion pad than the first insulating sheet, the first insulating sheet, and the second insulating sheet And a pair of electrodes provided on the respective surfaces of the first insulating sheet and the second insulating sheet and opposed to each other through the opening of the spacer. Have
The opening formed in the spacer in the first pressure-sensitive switch has a larger relationship than the opening formed in the spacer in the second pressure-sensitive switch. The seat device according to claim 2, wherein the sensitivity of the first pressure sensitive switch is higher than the sensitivity of the second pressure sensitive switch. The shortest distance from the bottom surface of the cushion pad to the first pressure-sensitive switch has a smaller relationship than the shortest distance from the bottom surface of the cushion pad to the second pressure-sensitive switch. 2. The seat device according to claim 1, wherein the second weight at which the second pressure sensitive switch is turned on is larger than the first weight at which the first pressure sensitive switch is turned on. . The thickness of the first pressure-sensitive switch has a relationship larger than the thickness of the second pressure-sensitive switch. By having the relationship, the thickness from the lower surface of the cushion pad to the first pressure-sensitive switch The seat device according to claim 4, wherein the shortest distance is smaller than the shortest distance from the lower surface of the cushion pad to the second pressure sensitive switch. A reinforcing member that is provided between the first pressure-sensitive switch and the second pressure-sensitive switch and a cushion pad portion that is opposed to the pressure-sensitive switch, and has a rigidity greater than the rigidity of the cushion pad;
The seat device according to any one of claims 1 to 5, wherein the reinforcing member is interlocked with the displacement of the cushion pad.

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