JP6529349B2 - Cushioning member for vehicle seat - Google Patents

Description

  The present invention relates to a cushioning member for a vehicle seat configured to detect the presence or absence of an occupant by activating an occupant detection sensor when the occupant is seated.

  2. Description of the Related Art In recent years, there is a seat such as a car equipped with an occupant detection sensor that detects whether an occupant is sitting or not. Such an occupant detection sensor is used to detect the presence or absence of an occupant in order to operate a seat belt reminder or an occupant restraint device. For example, in Patent Document 1, a pressure-sensitive switch (occupant detection sensor) is disposed below the cushion pad, and when the occupant is seated, the occupant detection sensor is turned on by being pressed by the cushion pad. Is disclosed.

JP 2014-210554 A

  By the way, if there is a wrinkle or the like on the surface of the cushion pad that presses the occupant detection sensor, the occupant detection sensor can not be stably operated, and the detection accuracy may be reduced.

Then, an object of this invention is to provide the cushion member of the vehicle seat which can operate an occupant detection sensor stably.
Moreover, an object of this invention is to provide the vehicle seat which can suppress the contact of a member.

  In order to achieve the above object, the cushion member of the vehicle seat according to the present invention is configured to detect the presence or absence of an occupant by activating an occupant detection sensor when the occupant is seated. A member comprising a pad member and a sheet member disposed on the surface of the pad member opposite to the occupant side, and the material of the pad member is poured in a state where the sheet member is positioned relative to the mold And the sheet member is a portion that can contact the occupant detection sensor, and a sensor operation unit that contacts the occupant detection sensor and operates the occupant detection sensor when the occupant sits down And a plurality of positioning portions provided around the sensor operation portion and positioning the sheet material with respect to the mold.

  According to such a configuration, the plurality of positioning portions are provided around the sensor operation portion, so that the positioning portion is aligned with the mold side positioning portion of the mold and the sheet operation is performed with the sensor operation portion stretched. , And the material of the pad material is poured into the mold and solidified. As a result, the occurrence of wrinkles in the sensor operation part can be suppressed, so that the occupant detection sensor can be stably operated.

  In the cushion member of the above-described vehicle seat, the plurality of positioning portions include a first positioning portion and a second positioning portion, and the first positioning portion and the second positioning portion are the sensor operation portions. It can be set as the structure arrange | positioned across.

  According to this, in manufacturing, the sensor operation unit is stretched by setting the sheet material to the mold in a state in which the space between the first positioning unit and the second positioning unit is pulled in a direction to widen the space. It is possible to prevent the sensor operation part from being wrinkled.

  In the cushion member of the above-described vehicle seat, the plurality of positioning portions may be arranged at positions surrounding the sensor operation portion.

  According to this, by setting the sheet material to the mold in a state in which the respective positioning portions are pulled apart from each other at the time of manufacture, the entire sensor operation portion can be stretched, and the sensor operation portion We can suppress what we can do more.

  In the cushion member of the above-described vehicle seat, the positioning portion may be disposed at a position avoiding the occupant detection sensor.

  According to this, the contact between the positioning unit and the occupant detection sensor can be suppressed.

  In the cushion member of the above-described vehicle seat, when the vehicle seat includes a seat frame and a plurality of seat springs mounted on the seat frame so as to face the seat material, the positioning unit includes the plurality of seat cushions. It can be set as the structure arrange | positioned in the position which avoided the seat spring.

  According to this, it is possible to suppress the contact between the positioning portion and the plurality of seat springs.

  In the cushion member of the above-described vehicle seat, the vehicle seat includes a sensor support member to which the occupant detection sensor is attached, and the occupant detection sensor includes the cushion member and the sensor support member when the occupant sits down. When it is comprised so that a passenger | crew may be detected by being pinched, the said positioning part can be set as the structure arrange | positioned in the position which avoided the said sensor support member.

  According to this, it is possible to suppress the contact between the positioning portion and the sensor support member.

  In the cushion member of the above-described vehicle seat, the positioning portion may be configured to include a ferromagnetic body.

  According to this, it is possible to easily set the sheet material in the mold in a state in which the sensor operation unit is stretched by using the magnetic force.

  In the cushion member of the vehicle seat described above, the area surrounded by the plurality of positioning portions may be configured to have less wrinkles of the sheet material than the outside of the area.

  According to this, the sensor operation unit can stably operate the occupant detection sensor.

  In the cushion member of the above-described vehicle seat, the area surrounded by the plurality of positioning portions may be configured such that the tension of the sheet material is stronger than the outside of the area.

  According to this, the sensor operation unit can stably operate the occupant detection sensor.

  According to the present invention, since it is possible to suppress the occurrence of wrinkles in the sensor operation portion of the sheet material constituting the cushion member, the occupant detection sensor can be stably operated.

  Further, according to the present invention, by disposing the two positioning portions of the sheet material with the sensor operating portion interposed therebetween, it is possible to suppress that the sensor operating portion is wrinkled, and stably operate the occupant detection sensor. Can.

  Further, according to the present invention, by disposing the plurality of positioning portions of the sheet material at the position surrounding the sensor operation portion, the sensor operation portion can be further prevented from being wrinkled, and the occupant detection sensor is stably operated. It can be done.

  Further, according to the present invention, by positioning the positioning portion at a position avoiding the occupant detection sensor, contact between the positioning portion and the occupant detection sensor can be suppressed.

  Further, according to the present invention, by arranging the positioning portion at a position avoiding the plurality of seat springs, the contact between the positioning portion and the plurality of seat springs can be suppressed.

  Further, according to the present invention, by positioning the positioning portion at a position avoiding the sensor support member, contact between the positioning portion and the sensor support member can be suppressed.

  Further, according to the present invention, by making the positioning portion include a ferromagnetic body, the sheet material can be easily set in the mold in a state in which the sensor operation portion is stretched, and the sensor operation portion can be wrinkled. Since it can control, an occupant detection sensor can be operated stably.

  Further, according to the present invention, by making the area surrounded by the plurality of positioning portions less wrinkles of the sheet material than the outside of the area, the sensor operation portion stably operates the occupant detection sensor. Can.

  Further, according to the present invention, the region surrounded by the plurality of positioning portions is configured such that the degree of tension of the sheet material is stronger than the outside of the region, whereby the occupant detection sensor is stably operated by the sensor operation portion. be able to.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view of the vehicle seat as a vehicle seat which concerns on embodiment. It is a perspective view of a cushion frame which constitutes a seat frame. It is a top view of a cushion frame, a seat spring, and a connection member. It is AA sectional drawing (a) of FIG. 3, and an expanded sectional view (b) of a connection member. It is a BB sectional view of FIG. It is a perspective view of a connection member, a leaf spring member, a crew member detection sensor, and a clip. It is a disassembled perspective view of a passenger | crew detection sensor. It is sectional drawing of the seat cushion corresponded to the CC cross section of FIG. It is sectional drawing of the seat cushion corresponding to FIG. 8 which shows the state when the passenger sat down. It is the figure which looked at a seat spring, a connection member, a passenger | crew detection sensor, and a cushion member from lower side. It is a figure (a)-(c) explaining the manufacturing method of a cushion member. It is Z arrow line view of Fig.11 (a). It is a figure which shows the sensor action part periphery of a cushion member. It is a figure which shows the connection member and passenger | crew detection sensor which concern on a 1st modification. It is a figure which shows the connection member which concerns on a 2nd modification. It is a figure (a), (b) showing an occupant detection sensor concerning the 3rd modification.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate. In the present invention, front, rear, right, left, upper and lower are based on the direction viewed from the occupant sitting on the vehicle seat.
As shown in FIG. 1, the vehicle seat according to the present embodiment is a vehicle seat S used in an automobile, and includes a seat cushion S1, a seat back S2, and a headrest S3.

  The vehicle seat S incorporates a seat frame F as shown in FIG. The seat frame F is mainly composed of a cushion frame F1 constituting a frame of the seat cushion S1 and a seat back frame (not shown) constituting a frame of the seat back S2. The vehicle seat S is configured by covering a cushion member 60 and a skin 70 on a seat frame F, as illustrated in FIG. 8 by taking the seat cushion S1 as an example.

  As shown in FIG. 2, the cushion frame F1 constituting the seat frame F includes a pair of side frames 11 disposed apart from each other on the left and right, and a pan frame 12 connecting front ends of the pair of side frames 11; It has a connecting pipe 13 connecting the rear ends of the pair of side frames 11, and these are formed in a frame shape integrally connected by welding or the like. The side frame 11 and the pan frame 12 are formed by pressing a metal plate or the like, and the connection pipe 13 is formed of a metal pipe.

  Between the pan frame 12 of the cushion frame F1 and the connecting pipe 13, a plurality of seat springs 20 as wire-like members are installed. More specifically, four (20A to 20D) of the plurality of seat springs 20 are disposed side by side, and the front end of each seat spring 20 is hooked on the pan frame 12 and the rear end is connected pipe 13 By being hooked on, it is bridged in the front-back direction (direction orthogonal to the left-right direction).

  Each of the plurality of seat springs 20 is a spring formed by being bent in a zigzag manner so as to meander the metal wire left and right. Each of the seat springs 20 is a portion extending in the left-right direction (the direction in which the plurality of seat springs 20 are aligned), and a portion extending in the front-rear direction (the direction in which the seat springs 20 are bridged) 7 It has three front and rear extending parts 22 and a pipe hooking part 23 hooked to the connecting pipe 13. The left and right extension parts 21 are arranged side by side. The foremost left and right extension 21 is a hook that is hooked to a hook 12 H formed on the pan frame 12. The front and rear extending portions 22 are provided so as to connect the end portions of the adjacent left and right extending portions 21 and are alternately arranged in the left and right. The pipe hooking portion 23 extends upward from the end of the rearmost left and right extending portion 21 and is formed so that the upper end is curved in a hook shape.

  As shown in FIG. 3, adjacent seat springs 20 are formed symmetrically in the left-right direction. Specifically, a seat spring 20B (a first seat spring) and a seat spring 20C (a second seat spring disposed adjacent to the first seat spring) are formed symmetrically in the left-right direction. The spring 20B is formed in left-right symmetry, and the seat spring 20C and the seat spring 20D are formed in left-right symmetry.

  The seat spring 20 is connected by a plurality of connecting members 30A to 30F. Each of the connecting members 30A to 30F is made of resin, and is integrally molded with the seat springs 20A to 20D by insert molding.

  The connection member 30A disposed at the rearmost end is a member that connects the rear ends of the seat springs 20A and 20B or the rear ends of the seat springs 20C and 20D. More specifically, in a state in which the connecting member 30A covers the portion of the pipe hooking portion 23 that contacts the connecting pipe 13, the pipe hooking portions 23 of the seat springs 20A and 20B or the pipe hooks of the seat springs 20C and 20D It forms so that part 23 comrades may be connected. By the pipe hooking portion 23 being covered by the connecting member 30A made of resin, the contact noise between the seat spring 20 and the connecting pipe 13 can be reduced.

  The connecting member 30B, which is arranged second after the other, is a member that connects the rear end portions of the seat springs 20A to 20D. More specifically, the connecting member 30B is formed to connect the rearmost portions of the left and right extending portions 21 of the seat springs 20A to 20D and the rear end of the front and rear extending portions 22 so as to connect them. .

  The third connecting member 30C disposed at the center in the left-right direction from the rear is a member that connects the rear ends of the seat springs 20B and 20C. More specifically, the connecting member 30C is formed to connect the front ends of the rearmostly extending portions 22 of the seat springs 20B and 20C. Further, the connecting member 30C connects the rearmost longitudinal extending portion 22 of the one seat spring 20B and the second left and right extending portion 21 from the rear, and the rearmost longitudinal extending portion of the one seat spring 20C 22 and the second left and right extension 21 are formed to be connected.

  Connection members 30D disposed on the left and right of the connection member 30C are formed to connect the rearmost longitudinal extending portion 22 of the seat spring 20A or the seat spring 20D and the second lateral extending portion 21 from the rear. .

  The connecting member 30E, which is disposed fourth after the other, is a member that connects the substantially central portions in the front-rear direction of the seat springs 20A to 20D. More specifically, the connecting member 30E includes the third rear extending portion 22 of the seat springs 20B and 20C, the fourth rear extending portion 22 of the seat springs 20A and 20B, and the seat spring 20C. , 20D are formed so as to connect the fourth front and rear extending portions 22 with each other. Further, the connecting member 30E is formed to connect the fourth front-rear extending portion 22 and the left-right extending portion 21 from the rear of each of the seat springs 20A to 20D.

  The connection member 30F disposed at the foremost end is a member that connects the front ends of the seat springs 20B and 20C. More specifically, the connecting member 30F has a substantially plate-shaped main body portion 31, and the main body portion 31 is formed so as to connect the second front-rear extending portion 22 from the front of the adjacent seat springs 20B and 20C. It is done. Further, the main body portion 31 couples the second and third left and right extension portions 21 from the front of the first seat spring 20B, and the second and third left and right extension portions from the front of the first seat spring 20C. 21 are formed to connect with each other. With such a configuration, since the seat springs 20B and 20C can be firmly connected, for example, the seat springs 20B and 20C can be operated as an integral spring.

  The connecting member 30F has a pair of covering portions 32 disposed on the front side of the main body portion 31 so as to be separated left and right. The covering portion 32 is formed to cover the foremost left and right extending portions 21 (latching portions) of the seat springs 20 B and 20 C and the front and rear extending portions 22, and is integrally formed with the main body portion 31. The foremost left and right extending portions 21 (latching portions) and the front and rear extending portions 22 of the seat springs 20A and 20D, the second extending left and right extending portion 21 and the front and rear extending portions 22 from the front, and 3 from the front The second left and right extending portion 21 is covered by a covering portion 30G made of resin. The contact noise of the seat spring 20 and the pan frame 12 is reduced by covering the foremost left and right extending parts 21 (latching parts) which are hooked to the pan frame 12 by the covering parts 32 and 30G made of resin. can do.

  The connecting member 30F is provided substantially at the center in the left-right direction of the seat cushion S1, and a portion thereof is in contact with the pan frame 12 and supported by the pan frame 12. Specifically, as shown in FIG. 4A, the pan frame 12 has a support portion 12A as a first portion and a first extension extending substantially downward from the rear end of the support portion 12A at its rear end portion. A second extension as a second portion disposed below the support 12A (opposite to the occupant) by extending backward from the rear end of the portion 12B and the first extension 12B. And 12C. Then, in the connecting member 30F, the front end portion as one end portion (more specifically, the front end portion of the main body portion 31 and a clamping portion 32A described later of the covering portion 32) contacts the supporting portion 12A from above and the supporting portion 12A is It is supported.

  With such a configuration, the seat springs 20B and 20C are supported in contact with the pan frame 12 via the connecting member 30F. Further, as shown in FIG. 3, the seat springs 20A and 20D are supported in contact with the pan frame 12 via the covering portion 30G. Thereby, the contact noise of the seat spring 20 and the pan frame 12 can be reduced. Further, since the connecting member 30F and the covering portion 30G are made of resin, the contact noise between them and the pan frame 12 can also be reduced.

  Returning to FIG. 4A, the rear end portion (rear end portion of the main body 31) as the other end of the connecting member 30F is separated from the second extending portion 12C and floats from the second extending portion 12C. It is arranged in such a state. Thus, a gap is formed between the rear end portion of the connecting member 30F and the second extending portion 12C. The front end of the connecting member 30F is supported by being in contact with and supported by the pan frame 12, and the rear end is separated from the pan frame 12, whereby the contact area between the connecting member 30F and the pan frame 12 can be reduced. Also, the contact noise between the connecting member 30F and the pan frame 12 can be reduced.

  As shown in FIG. 5, the pan frame 12 has a protrusion 12 </ b> D that protrudes upward (the occupant side) from the support 12 </ b> A. The part (sandwich part 32A) covering the front and rear extension parts 22 of the pair of covering parts 32 is disposed so as to sandwich the projecting part 12D from the left and right in a state where the connecting member 30F is supported by the support part 12A. Thereby, the position of the connecting member 30F can be stabilized. Further, as shown in FIG. 6, the main body portion 31 of the connecting member 30F has a concave portion 33 having a shape which is concaved rearward at a portion between the pair of covering portions 32 at the front end portion thereof. The recess 33 is formed with a width and a depth that can receive the protrusion 12D of the pan frame 12. As a result, the recess 33 is disposed so as to sandwich the protrusion 12D from the left and right together with the sandwiching portion 32A, so that the position of the connecting member 30F can be made more stable.

  An occupant detection sensor 40 and a plate spring member 50 as a spring member are attached to the upper surface of the connecting member 30F. That is, the connecting member 30F also functions as a member (sensor support member) that supports the occupant detection sensor 40 from the lower side by the attachment of the occupant detection sensor 40. As a result, the member connecting the seat spring 20 can be used as a member supporting the occupant detection sensor 40 and the like, so that downsizing and cost reduction can be achieved. The connecting member 30F is supported by the cushion frame F1 via a seat spring 20 installed on the cushion frame F1.

  The occupant detection sensor 40 is a sensor configured to detect the presence or absence of an occupant by operating when the occupant is seated. The occupant detection sensor 40 includes a base 41 attached to the connection member 30F, and a pair of detection units 42 (a first detection unit 42A and a second detection unit) provided at both left and right ends of the base 41 so as to be connected to the base 41 42B). The base portion 41 has a pair of sensor side through holes 43 (through holes) provided to penetrate up and down in order to attach the occupant detection sensor 40 to the connecting member 30F.

  As shown in FIG. 7, the occupant detection sensor 40 is formed by overlapping and bonding a first sheet 40A, a second sheet 40B, and a third sheet 40C having flexibility. Each of the sheets 40A, 40B, and 40C has through holes 43A, 43B, and 43C that form the sensor side through holes 43 when stacked. The first sheet 40A includes two electrodes E1 formed on the left and right ends of the upper surface, and a pair of wires W1 extending inward in the left-right direction from each electrode E1 along the rear end of the first sheet 40A. Have. Electric wires 44 are drawn from the respective wires W1. Further, the first sheet 40A has an exhaust port 45 provided in the portion to be the base 41 so as to penetrate vertically between the through holes 43A (a pair of sensor side through holes 43). The third sheet 40C includes two electrodes E2 formed on the left and right ends of the lower surface, and a wire W2 extending along the front end of the third sheet 40C to electrically connect the two electrodes E2. have. The second sheet 40B avoids the pair of through holes 46A provided at the positions facing the pair of electrodes E1 and E2, the through holes 46B provided at the position facing the exhaust port 45, and the through holes 43B. An exhaust groove 46C is provided to connect the left and right through holes 46A and the central through hole 46B.

  By overlapping and bonding the first sheet 40A, the second sheet 40B, and the third sheet 40C, the pair of upper and lower electrodes E1 and E2 face each other in a state of being spaced apart through the through hole 46A (second sheet 40B) The through hole 46B and the exhaust port 45 communicate with each other. The detection unit 42 is a portion in which the pair of electrodes E1 and E2 are disposed. A filter 40D is attached to the lower surface of the first seat 40A (the occupant detection sensor 40) so as to cover the exhaust port 45. The filter 40 </ b> D has air permeability and suppresses entry of water into the occupant detection sensor 40 from the exhaust port 45.

  When no pressure is applied to the detection unit 42, the pair of electrodes E1 and E2 are separated, so the occupant detection sensor 40 is in the OFF state where no current flows. On the other hand, when pressure is applied to each of the first detection unit 42A and the second detection unit 42B so that the right pair of electrodes E1 and E2 contact and the left pair of electrodes E1 and E2 contact, the occupant detection sensor In the state 40, the current flows. When the pair of electrodes E1 and E2 are in contact, the air between the pair of electrodes E1 and E2 is pushed out of the space between the pair of electrodes E1 and E2, passes through the exhaust groove 46C and the through hole 46B, and is exhausted. The air is discharged to the outside of the occupant detection sensor 40 from 45.

As shown in FIG. 6, the plate spring member 50 is a plate-like spring extending long in the left-right direction (the direction in which the base 41 and the detection unit 42 are aligned), and faces the occupant detection sensor 40 below the occupant detection sensor 40. It is arranged. The plate spring member 50 has the left and right pressing portions 51, and the connecting portion 52 integrally linking the left and right pressing portions 51 (the first pressing portion 51A and the second pressing portion 51B).
The connecting portion 52 is a portion (base facing portion) facing the base 41 of the occupant detection sensor 40, and a pair of first through holes 53 (through holes) communicating with the pair of sensor side through holes 43, and the exhaust port 45. And a second through hole 55 as an air flow channel facing the air flow passage.

  The pressing unit 51 includes a first pressing unit 51A facing the first detection unit 42A and a second pressing unit 51B facing the second detection unit 42B. Each pressing portion 51 is provided with a through hole 56 as an opening facing the detecting portion 42. The through hole 56 has a substantially circular shape, and is provided to face the detection unit 42 when the plate spring member 50 and the occupant detection sensor 40 are viewed from the lower side. When the opening provided in the pressing portion 51 is the through hole 56, for example, the rigidity of the plate spring member 50 can be secured more than in the case where the opening is a notch.

  The main body portion 31 of the connecting member 30F has an attaching portion 34, opposing portions 35 provided on the left and right sides of the attaching portion 34, and a cushion support portion 36 provided so as to surround the attaching portion 34 and the opposing portion 35. doing.

  The attachment portion 34 is a portion to which the base portion 41 of the occupant detection sensor 40 and the connection portion 52 of the plate spring member 50 are attached. The mounting portion 34 includes two mounting holes 34A for mounting the base 41 and the connecting portion 52, which are provided at positions facing the pair of sensor side through holes 43 and the pair of first through holes 53, and two mounting holes. It has an air vent 34B provided at a position facing the exhaust port 45 and the second through hole 55 between 34A. The mounting holes 34A and the air vent holes 34B are both provided to penetrate vertically. Further, as shown in FIG. 4B, the attachment portion 34 is an inclined surface 34C that inclines downward (in a direction away from the occupant side) toward the rear from the front to the center in the left-right direction of the rear end of the upper surface. have. The inclined surface 34C is a surface for guiding the electric wire 44 extending from the occupant detection sensor 40 toward the lower side of the connecting member 30F. By having such an inclined surface 34C, the handling of the electric wire 44 can be improved, and the load applied from the cushion member 60 to the electric wire 44 can be reduced when the occupant sits down.

  As shown in FIG. 4A, the electric wire 44 is disposed below the pan frame 12, and the middle portion is held by the clip 91. The electric wire 44 has a midway portion attached to the second extension 12C by engaging the clip 91 with the through hole 12E formed in the second extension 12C. Since a gap is formed between the connecting member 30F and the second extension 12C, the claw portion of the clip 91 for attaching the electric wire 44 can be disposed utilizing this gap, so Can be easily attached to the pan frame 12. In addition, electric wire itself can also be arrange | positioned in the clearance gap between the connection member 30F and the 2nd extension part 12C. Also, the end of the wire 44 is connected to a connector 92 with a clip. The pan frame 12 has a third extension 12K extending substantially downward from the front end of the support 12A, and a fourth extension 12L extending forward from the front end of the third extension 12K. The end of the electric wire 44 is attached to the pan frame 12 by engaging the connector 92 with the through hole 12M formed in the fourth extension 12L.

Returning to FIG. 6, the facing portion 35 is a portion facing the detecting portion 42, and the first facing portion 35A facing the first detecting portion 42A and the second facing portion 35B facing the second detecting portion 42B are It contains. At a portion of each facing portion 35 facing the detection portion 42, a convex portion 37 as a pressing portion that protrudes upward toward the detection portion 42 is provided.
The cushion support portion 36 is a portion of the edge of the main body portion 31. The connecting member 30F is integrally formed with the seat springs 20B and 20C so that the cushion support portion 36 covers the seat springs 20B and 20C (wire-like members).

  As shown in FIG. 8, in the occupant detection sensor 40 and the plate spring member 50, the clip 93 as a fixing member is inserted into the sensor side through hole 43 and the first through hole 53 and engaged with the attachment hole 34A. , And is fixed to the connecting member 30F. The occupant detection sensor 40 and the leaf spring member 50 are positioned on the connecting member 30F by being fixed to the connecting member 30F. Further, in a state where the occupant detection sensor 40 and the plate spring member 50 are fixed to the connecting member 30F, the second through hole 55 and the air vent hole 34B communicate with each other, and the exhaust port 45 of the occupant detection sensor 40 is a second It is disposed to face the through hole 55 and the air vent hole 34B.

  In the seat cushion S1, the connecting member 30F (opposite member), the occupant detection sensor 40, and the plate spring member 50 are disposed below the cushion member 60. The left and right detection portions 42 of the occupant detection sensor 40 are respectively disposed between the cushion member 60 and the convex portions 37 (connection members 30F) opposed to each other through the through holes 56 of the plate spring member 50. .

  The attachment portion 34 of the connecting member 30F is provided to project above the opposing portion 35 (on the side of the cushion member 60), and a step 38 is formed between the attachment portion 34 and the opposing portion 35. There is. On the other hand, the lower surfaces of the mounting portion 34 and the facing portion 35 are formed to be substantially flat surfaces. For this reason, the attachment portion 34 is formed to be thicker in the vertical direction (the direction facing the cushion member 60) than the thickness in the vertical direction of the facing portion 35. As a result, the rigidity of the attachment portion 34 to which the connecting member 30F is fixed, in particular, the occupant detection sensor 40 and the like can be secured, and the occupant detection sensor 40 and the like can be stably attached. The cushion support portion 36 is provided such that the upper portion thereof protrudes above the upper surface of the mounting portion 34, and supports the cushion member 60. The convex portion 37 has a substantially spherical shape, and the diameter D1 (maximum diameter) thereof is formed to be larger than the diameter D2 of the detection portion 42 of the occupant detection sensor 40.

  The leaf spring member 50 is formed to be longer in the left-right direction than the occupant detection sensor 40. Therefore, the end 50E of the pressing portion 51 outside in the left-right direction (on the side of the detecting portion 42 of the plate spring member 50) is located farther from the base 41 (center of the occupant detection sensor 40) than the detecting portion 42 in the left-right direction. Specifically, it is disposed at a position outside the detection unit 42. The through hole 56 provided in the plate spring member 50 is formed such that the diameter D3 thereof is larger than the diameter D2 of the detection portion 42. Further, the diameter D3 of the through hole 56 is formed to be larger than the diameter D1 of the convex portion 37. Thus, the convex portion 37 can easily enter the through hole 56.

  The plate spring member 50 is formed in a shape in which each pressing portion 51 (end facing the detecting portion 42) smoothly curves upward as going from the inner side in the left-right direction to the outer side. For this reason, the occupant detection sensor 40 disposed on the plate spring member 50 is fixed to the connecting member 30F at the center in the left-right direction via the connecting portion 52, and the left and right end portions are supported from below by the pressing portion 51 Thus, in the state where the occupant shown in FIG. 8 is not seated, the detection portion 42 is curved upward as it goes outward from the inner side in the left-right direction so as to be away from the convex portion 37. In addition, the leaf spring member 50 may be formed in the shape which the whole curves in the state before attaching to the connection member 30F, the connection part 52 is flat, and the shape which only the press part 51 curves. It may be formed in

  The flat spring member 50 forms a gap between the cushion member 60 and the facing portion 35 by pressing the cushion member 60 upward. More specifically, the first pressing portion 51A presses the cushion member 60 upward to form a gap between the cushion member 60 and the first facing portion 35A, and the second pressing portion 51B is a cushion. By pressing the member 60 upward, a gap is formed between the cushion member 60 and the second opposing portion 35B.

  The occupant detection sensor 40 is in the OFF state because the detection portion 42 is not strongly pressed by the cushion member 60 because the through hole 56 is provided in the plate spring member 50 when the occupant is not sitting.

  The cushion member 60 of the seat cushion S1 used for the vehicle seat S includes a pad material 61 made of urethane foam and a sheet material 62 made of non-woven fabric. The sheet material 62 has a pad material 61 by contact with a sheet spring 20 bridged to face the sheet material 62, a connection member 30F disposed to face the sheet material 62, a plate spring member 50, and the like. It is provided to suppress damage, and is disposed so as to cover substantially the entire lower surface of the pad member 61.

  As shown in FIG. 9, when the occupant sits on the vehicle seat S (seat cushion S1), the skin 70 and the cushion member 60 are pushed downward by the thigh T of the occupant, whereby the lower side of the cushion member 60 is The surface presses the left and right detection units 42 and the pressing unit 51 downward. Then, the left and right detection portions 42 are respectively sandwiched by the cushion member 60 and the facing portion 35 of the connecting member 30F, more specifically, the convex portion 37 which has entered the through hole 56 of the plate spring member 50, A pressure is applied from the convex portion 37 to the detection portion 42 between the cushion member 60 and the facing portion 35, and the pair of electrodes E1 and E2 (see FIG. 7) are in contact. As a result, the occupant detection sensor 40 is turned on to detect that the occupant is sitting.

  In addition to the configuration in which the detecting portion is sandwiched between the cushion member and the flat surface when the occupant is seated, the connecting member 30F includes the convex portion 37 (pressurizing portion) in addition to the detecting portion 42. Since the pressure to be generated is increased, the pair of electrodes E1 and E2 can be more reliably brought into contact with each other. Thus, the occupant detection sensor 40 can be favorably operated when the occupant is seated. On the other hand, since the convex portion 37 has a substantially spherical shape, it is possible to suppress that a large load is locally applied to the detection portion 42.

  The air discharged from the exhaust port 45 of the occupant detection sensor 40 when the pair of electrodes E1, E2 comes in contact is discharged under the connecting member 30F through the second through hole 55 and the air vent hole 34B. By having such a second through hole 55 and the air vent hole 34B, the air discharged from the occupant detection sensor 40 can be favorably released. In particular, since the second through hole 55 and the air vent hole 34B are provided between the pair of first through holes 53 or the pair of attachment holes 34A for fixing, the occupant detection sensor 40 and the plate spring member 50 can be used. When attached to the connecting member 30F, they can be closely attached around the exhaust port 45, the second through hole 55, and the air vent hole 34B, so that the air discharged from the occupant detection sensor 40 can be released better.

Next, the cushion member 60 of the seat cushion S1 will be described in more detail.
As shown from the lower side in FIG. 10, the sheet member 62 of the cushion member 60 has a sensor operating portion 63 and a plurality of positioning portions 64.
The sensor operation unit 63 is a portion of the surface of the sheet member 62 that can contact the detection unit 42 of the occupant detection sensor 40. The sensor operation unit 63 contacts the detection unit 42 of the occupant detection sensor 40 from the top when the occupant is seated, and sandwiches the detection unit 42 with the connecting member 30F (convex portion 37), thereby the occupant detection sensor 40. Is activated (turned on).

  The positioning portion 64 is a portion for positioning the sheet material 62 with respect to a mold for molding the cushion member 60. The positioning portion 64 is provided, for example, by sticking a ferromagnetic material such as iron formed in a disk shape on the non-woven fabric constituting the sheet material 62 or the like. Among the plurality of positioning units 64, in particular, the positioning unit 64A is provided around the sensor operation unit 63 and in the vicinity of the sensor operation unit 63. More specifically, four positioning portions 64A are provided, and are disposed at positions surrounding the two sensor operating portions 63. Further, two positioning portions 64A (a first positioning portion and a second positioning portion) arranged on a diagonal of a rectangle formed by four positioning portions 64A are arranged with one sensor operation portion 63 interposed therebetween. ing. As an example, it is desirable that the positioning portion 64A be disposed at a position of 40 mm to 50 mm from the nearest sensor operation portion 63.

  The four positioning portions 64A are disposed at positions surrounding the occupant detection sensor 40 and, more specifically, the connecting member 30F to which the occupant detection sensor 40 is attached. Also, the four positioning portions 64A are disposed at a position between the seat spring 20A and the seat spring 20B so as to avoid the seat springs 20A to 20D, and the remaining two are between the seat spring 20C and the seat spring 20D. It is placed in position. That is, when the seat cushion S1 is viewed from the lower side, the four positioning portions 64A are arranged so as to be visible without being hidden by the connecting members 30F and the seat springs 20A to 20D. Thereby, contact with positioning part 64A, crew member detection sensor 40, connecting member 30F, and seat springs 20A-20D can be controlled, for example, generation of contact sound etc. can be controlled.

Next, an example of a method of manufacturing the cushion member 60 will be described.
The cushion member 60 sets the sheet material 62 in the first mold 81 as shown in FIG. 11 (a), and as shown in FIG. 11 (b), the first mold 81 and the second mold 82 A mold 80 having a cavity 60C for assembling and molding the cushion member 60 is assembled, and the material of the pad material 61 is poured into the mold 80 and hardened as shown in FIG.

  When setting the sheet material 62 in the first mold 81, the sheet material 62 is set in a state of being positioned with respect to the first mold 81. Specifically, as shown in FIG. 11A, the first mold 81 is provided with a plurality of mold-side positioning portions 84 made of permanent magnets at locations corresponding to the plurality of positioning portions 64 of the sheet material 62. It is done. Then, each positioning portion 64 is set to the corresponding mold-side positioning portion 84, and the sheet material 62 is set to the first mold 81, whereby the positioning portion 64 is attracted to the mold-side positioning portion 84 by magnetic force. Thus, the sheet material 62 can be positioned with respect to the first mold 81.

  The mold-side positioning unit 84 has four mold-side positioning units 84A corresponding to the four positioning units 64A, as shown in FIG. 12 viewed from the direction of the arrow in FIG. 11A. The center 84C of each mold-side positioning unit 84A is the center of the corresponding positioning unit 64A when viewed from the direction orthogonal to the sensor operation unit 63 in the state before aligning the positioning unit 64A with the mold-side positioning unit 84A shown in FIG. It is arranged on the opposite side to the sensor operation part 63 side (area 62A side) on the basis of 64C. More specifically, in the diagonal direction of the substantially rectangular area 62A surrounded by the four positioning portions 64A, the center 84C of each mold-side positioning portion 84A is the center 62C of the area 62A rather than the center 64C of the corresponding positioning portion 64A. It is arranged at a position far from. Further, each mold side positioning portion 84A is disposed at a position overlapping the center 64C of the corresponding positioning portion 64A when viewed from the direction orthogonal to the sensor operation portion 63 in a state before aligning the positioning portion 64A with the mold side positioning portion 84A. It is done. That is, in a state before the positioning portions 64A are aligned, each mold-side positioning portion 84A is arranged such that the center 64C of the corresponding positioning portion 64A is positioned inside the outline thereof.

  Therefore, when each positioning portion 64A is aligned with the corresponding mold side positioning portion 84A, each positioning portion 64A is directed away from the center 62C of the area 62A toward the center 84C of the corresponding mold side positioning portion 84A. The sheet material 62 is set to the first mold 81 in a state in which the area 62A (the sensor operation portion 63) is stretched. Since the mold side positioning part 84 is a permanent magnet and the positioning part 64 includes a ferromagnetic material, the sheet material 62 is put on the first mold 81 in a state in which the sensor operation part 63 is stretched using magnetic force. It can be easily set. The positioning portions 64 (including 64A) have substantially the same diameter (size) and a diameter (size) smaller than that of the mold-side positioning portion 84A when viewed from the direction orthogonal to the sensor operation portion 63. ing.

  After the sheet material 62 is set in the first mold 81, as shown in FIG. 11B, the mold 80 is assembled, and as shown in FIG. 11C, the material of the pad material 61 is formed on the mold 80. The cushion member 60 can be manufactured by pouring and hardening, and then taking it out of the mold 80. As described above, since the cushion member 60 is manufactured by pouring the material of the pad material 61 into the forming die 80 and solidifying the region 62A of the sheet material 62 in a stretched state, The area 62A (particularly, the sensor operation unit 63) has a configuration in which the tension of the sheet material 62 is stronger (tension is higher) than the outside of the area 62A. Furthermore, as shown in FIG. 13, the area 62A (the sensor operating portion 63) has a configuration in which the wrinkles 62B formed on the surface of the sheet material 62 are smaller than the outside of the area 62A. The degree of tension of the sheet member 62 can be considered as the degree of unevenness of the surface (area 62A) of the cushion member 60. Therefore, after forming the cushion member 60, the surface (area 62A) of the cushion member 60 is three-dimensionally measured By measuring with a container, it is possible to measure as the degree of unevenness of the region 62A.

  Since the two positioning portions 64A are disposed with the one sensor operation portion 63 interposed therebetween, the sheet material 62 is set to the first mold 81 in a state in which the distance between the two positioning portions 64A is extended. Thus, the first sensor operation unit 63 can be in a stretched state, and the sensor operation unit 63 can be prevented from having the wrinkles 62B. Furthermore, since the four positioning portions 64A are disposed at positions surrounding the sensor operation portion 63, the sheet material 62 can be first die 81 in a state where the positioning portions 64A are pulled away from each other during manufacturing. By setting the sensor operation unit 63 as a whole, the sensor operation unit 63 can be in a stretched state, and the occurrence of the wrinkles 62B in the sensor operation unit 63 can be further suppressed.

  According to the present embodiment described above, the elasticity of the cushion member 60 is reduced due to aged deterioration and, for example, even when the cushion member 60 is deformed to hang down to the facing portion 35, as shown in FIG. The spring member 50 can form a gap between the cushion member 60 and the facing portion 35. Thus, erroneous detection of the occupant detection sensor 40 due to the detection portion 42 being pinched by the cushion member 60 and the facing portion 35 when the occupant is not sitting can be suppressed.

  Further, since the occupant detection sensor 40 and the plate spring member 50 are positioned on the connecting member 30F (the same member), the positional accuracy of the occupant detection sensor 40 and the plate spring member 50 can be improved. Thereby, a gap can be favorably formed in the part where the detection part 42 is arrange | positioned between the cushion member 60 and the opposing part 35, and a misdetection can be suppressed more.

  Further, since the occupant detection sensor 40 and the plate spring member 50 can be attached together to the connecting member 30F by the clip 93, the number of parts can be reduced, and the positional accuracy of the occupant detection sensor 40 and the plate spring member 50 can be reduced. It is possible to further improve false positive detection.

  Further, since the end 50E of the plate spring member 50 is disposed outside the detection unit 42 in the left-right direction, the entire portion overlapping the detection unit 42 of the cushion member 60 can be seen upward by the plate spring member 50 as viewed from the upper side. It can be pressed towards. Also by this, since a gap can be formed in the part where the detection part 42 is arrange | positioned between the cushion member 60 and the opposing part 35, a misdetection can be suppressed more.

  As shown in FIG. 9, when the occupant sits down, the detection unit 42 detects the occupant by being pinched by the cushion member 60 and the convex portion 37 provided on the facing portion 35, so that the detection unit is a cushion member and The accuracy of detection by the occupant detection sensor 40 can be improved as compared with the configuration in which the driver is caught by a flat surface.

  Further, since the diameter D1 of the convex portion 37 is larger than the diameter D2 of the detection portion 42, the convex portion 37 stably contacts the detection portion 42, and pressure can be favorably applied to the detection portion 42. Accuracy can be further improved.

  On the other hand, as shown in FIG. 8, since the mounting portion 34 protrudes above the facing portion 35, it is difficult for a load to be applied to the detection portion 42 when the occupant is not sitting. This alone does not detect the presence of an occupant, and can improve the detection accuracy as a whole.

  In addition, since the step 38 is formed between the mounting portion 34 and the facing portion 35, the amount of movement (play) in the vertical direction of the detection portion 42 can be secured, so that a small load is applied to the cushion member 60 as well. This alone does not detect the presence of an occupant, and the accuracy of detection can be further improved.

  Further, the occupant detection sensor 40 is curved such that the detection unit 42 is separated from the convex portion 37 in a state where the occupant is not sitting, so that a space can be secured between the detection unit 42 and the convex portion 37 . Also by this, it is not detected that the occupant is present only by applying a small load to the cushion member 60, and the detection accuracy can be further improved.

  Further, since the cushion support portion 36 protrudes above the mounting portion 34, a space can be secured between the cushion member 60 and the mounting portion 34 or the facing portion 35 when the occupant is not sitting. As a result, the presence of an occupant is not detected merely by applying a small load to the cushion member 60, and the detection accuracy can be further improved.

  As shown in FIG. 4A, since the occupant detection sensor 40 is supported by the pan frame 12 via the connecting member 30F, the occupant detection sensor 40 can be stably supported with a simple configuration. As a result, the occupant detection sensor 40 can be stably operated, and the accuracy of detection by the occupant detection sensor 40 can be improved.

  Further, as shown in FIG. 5, in the state where the connecting member 30F is supported by the pan frame 12, the sandwiching portion 32A is disposed to sandwich the protruding portion 12D, so that the position of the connecting member 30F can be stabilized. Thus, the occupant detection sensor 40 can be supported more stably.

  Further, as shown in FIG. 6, since the connecting member 30F has a recess 33 capable of receiving the protrusion 12D, the sandwiching portion 32A and the recess 33 sandwich the protrusion 12D from the left and right to thereby position the connecting member 30F. It can be made more stable, and the occupant detection sensor 40 can be supported more stably.

  As shown in FIG. 4A, since the connecting member 30F for connecting the seat spring 20 is supported by the pan frame 12, it is possible to suppress excessive bending of the seat spring 20. Thereby, the sitting comfort of the vehicle seat S can be improved.

  Further, since the front end portion of the connecting member 30F is supported in contact with the support portion 12A and the rear end portion is disposed apart from the second extending portion 12C, it is possible to suppress excessive bending of the seat spring 20 The amount of deflection of the seat spring 20 can be secured. This can further improve the sitting comfort.

  Further, as shown in FIG. 3, since the connecting member 30F connects the left and right extension parts 21 of the seat springs 20B and 20C, the distance between the left and right extension parts 21 can be defined. As a result, since the amount of deflection of the seat spring 20 can be adjusted, the sitting comfort can be further improved.

  Further, since the connecting member 30F is provided at the center in the left-right direction, the connecting member 30F can receive the load in a well-balanced manner, and the sitting comfort can be further improved.

  Further, since the two seat springs 20 disposed adjacent to each other are formed symmetrically in the left-right direction, the seat spring 20 can be bent in a well-balanced manner as a whole on the basis of the center in the left-right direction, thereby further improving sitting comfort. It can be done.

  As shown in FIG. 10, in the cushion member 60, the positioning portion 64A of the sheet material 62 is provided around the sensor operation portion 63 and in the vicinity of the sensor operation portion 63. The sheet material 62 is set to the forming die 80 in a state in which the sensor operation part 63 is stretched according to the die-side positioning part 84A, and the material of the pad material 61 is poured into the forming die 80 and solidified. As a result, it is possible to suppress the occurrence of the wrinkles 62 </ b> B in the sensor operation unit 63, and the occupant detection sensor 40 can be stably operated by the sensor operation unit 63.

  Further, as shown in FIG. 12, since the centers 84C of the mold-side positioning units 84A are disposed on the opposite side of the sensor operation unit 63 with reference to the centers 64C of the corresponding positioning units 64A, the positioning units The sheet member 62 can be set to the forming die 80 in a state in which the sensor operating portion 63 is stretched by aligning 64 </ b> A with the mold side positioning portion 84 </ b> A. Thereby, it can suppress that the sensor action part 63 of the cushion member 60 is wrinkled.

  Further, since each mold side positioning part 84A is disposed at a position overlapping with the center 64C of the corresponding positioning part 64A, the positioning part 64A can be easily aligned with the mold side positioning part 84A, and the state where the sensor operation part 63 is stretched. The sheet material 62 can be easily set in the forming die 80. In the present embodiment, in particular, since the mold-side positioning portion 84A is a magnet and the positioning portion 64A includes a ferromagnetic material, the sheet material 62 is molded while the sensor operating portion 63 is stretched using magnetic force. It can be set easily by 80. Thereby, the cushion member 60 in which the sensor operation part 63 is not easily creased can be easily manufactured.

  In addition, since the size of the positioning portion 64 is smaller than the size of the mold-side positioning portion 84A, the positioning portion 64 remaining on the cushion member 60 can be made less noticeable after the cushion member 60 is manufactured. In addition, when the cushioning member 60 is attached to the vehicle seat S because the positioning portion 64 is small, the positioning portion 64 and other members of the vehicle seat S, for example, the occupant detection sensor 40, the connecting member 30F, and the seat Interference with the springs 20A to 20D can be suppressed.

  Although one embodiment of the invention has been described above, the present invention is not limited to the embodiment. About a specific structure, it can change suitably in the range which does not deviate from the meaning of invention as follows.

  In the embodiment described above, the diameter D1 (maximum diameter) of the convex portion 37 provided on the connecting member 30F is larger than the diameter D2 of the detection portion 42 of the occupant detection sensor 40, but the invention is not limited thereto. Absent. For example, as shown in FIG. 14, the diameter D1 (maximum diameter) of the convex portion 37 may be smaller than the diameter D2 of the detection portion 42. According to this, since it is possible to suppress an increase in diameter (increase in size) of the convex portion 37, it is possible to make the connecting member 30F and the occupant detection sensor 40 compact.

  In the said embodiment, although the convex part 37 had comprised substantially spherical shape, it is not limited to this. For example, the convex portion may have a substantially cylindrical shape, and the corner portion may be chamfered into a curved shape.

  In the embodiment described above, the convex portion 37 integrally provided on the opposing portion 35 is illustrated as a pressurizing portion that applies pressure to the detecting portion 42 between the cushion member 60 and the opposing portion 35 when the occupant sits down. However, it is not limited to this. For example, the pressing unit is disposed between the detection unit of the occupant detection sensor and the flat opposite portion, and is a disk-shaped foam elastic body attached by being attached to at least one of the occupant detection sensor and the opposite portion. Or the like.

  In the said embodiment, as shown in FIG. 8, although the upper part of the seat spring 20 and the upper surface of the attaching part 34 were arrange | positioned in substantially the same height position, it is not limited to this. For example, as shown in FIG. 15, the seat spring 20 (wire-like member) may be disposed such that the upper portion thereof protrudes above the upper surface of the mounting portion 34 (on the cushion member 60 side). Note that, in this configuration, the cushion support portion 36 covering the seat spring 20 is also disposed so that the upper portion thereof protrudes upward relative to the upper surface of the mounting portion 34. Even with such a configuration, when the occupant is not seated, a space can be secured between the cushion member 60 and the attachment portion 34 or the facing portion 35. Therefore, an occupant detection not shown only when a small load is applied to the cushion member 60 The sensor does not detect the presence of an occupant, and the accuracy of detection can be improved. Further, by providing the cushion support portion 36 so as to cover the seat spring 20, the rigidity of the connecting member 30F can be enhanced.

  In the above embodiment, the occupant detection sensor 40 has a flat shape and is supported by the flat spring member 50 from below to curve the detection unit 42 away from the convex portion 37 when the occupant is not sitting. However, it is not limited to this. For example, as shown in FIG. 16A, the occupant detection sensor 40 itself is directed from the inside to the outside in the left-right direction so that the detection unit 42 is separated from the convex portion 37 when the occupant is not seated. , May be formed in a shape that is curved upward. Further, as shown in FIG. 16B, the occupant detection sensor 40 is configured such that the left and right end portions are outside in the left and right direction with respect to the central portion so that the detection portion 42 is separated from the convex portion 37 when the occupant is not seated. It may be formed in a shape that bends so as to extend obliquely upward. According to such a configuration, since a space can be secured between the detection portion 42 and the convex portion 37 when the occupant is not sitting, it is detected that the occupant is present only by applying a small load to the cushion member (not shown). And the accuracy of detection can be further improved.

  In the embodiment, the flat spring member 50 forms a gap between the cushion member 60 and the second opposing portion 35B, and the first pressing portion 51A forms a gap between the cushion member 60 and the first opposing portion 35A. Although it was one spring member which has the 2nd press part 51B to form, and the connection part 52 which connects the 1st press part 51A and the 2nd press part 51B integrally, it is not limited to this. For example, the spring member forming a gap between the cushion member and the first facing portion and the spring member forming the gap between the cushion member and the second facing portion may be separately provided. In addition, according to the structure which the 1st press part 51A and the 2nd press part 51B were connected integrally like the said embodiment, compared with the structure provided separately with a spring member, the assemblability of the leaf | plate spring member 50 is improved. Can be improved.

  In the embodiment described above, the plate spring member 50 has the second through hole 55 (through hole) as an air flow path facing the exhaust port 45 of the occupant detection sensor 40, but the invention is not limited thereto. The plate spring member may have a groove-like air passage. Moreover, in the said embodiment, although the plate spring member 50 had the through-hole 56 as an opening facing the detection part 42, it is not limited to this, For example, a plate spring member has a notch-shaped opening. You may have.

  In the above embodiment, the clip 93 is exemplified as the fixing member for fixing the occupant detection sensor 40 and the plate spring member 50 to the connecting member 30F, but the invention is not limited thereto. For example, the fixing member is a screw or a pin. May be

  In the embodiment described above, the connecting member 30F is supported by the pan frame 12 with a part thereof (the front end of the main body 31 and the sandwiching portion 32A) in contact with the pan frame 12; Absent. For example, the connecting member may be supported by the pan frame in contact with the pan frame in its entirety.

  In the embodiment, the connecting member 30F connecting the seat springs 20B and 20C is illustrated as a sensor supporting member for supporting the occupant detection sensor 40. However, the present invention is not limited to this. The sensor supporting member is a member connecting the seat springs Other members may be used. Similarly, in the embodiment, the connecting member 30F is exemplified as the facing member disposed on the opposite side to the occupant side of the cushion member 60, but the present invention is not limited thereto, and the facing member is a member for connecting the seat spring Other members may be used. The sensor support member and the opposing member may not be the same member but may be separate members.

  In the embodiment, as shown in FIG. 12, each mold side positioning portion 84A is disposed at a position overlapping the center 64C of the corresponding positioning portion 64A, but the present invention is not limited to this. For example, to explain with reference to FIG. 12, each die-side positioning unit 84A corresponds to the corresponding positioning unit when viewed from the direction orthogonal to the sensor operation unit 63 in the state before aligning the positioning unit 64A with the die-side positioning unit 84A. It may be arranged on the opposite side to the sensor operation part 63 side with reference to 64A. In other words, the whole of each mold-side positioning part 84A may be disposed at a position farther from the center 62C of the area 62A than the whole of the corresponding positioning part 64A. Also by this, since the sheet material 62 can be set to the forming die 80 in a state in which the sensor operation portion 63 is stretched by aligning the positioning portion 64A with the mold side positioning portion 84A, the sensor operation portion 63 of the cushion member 60 can be creased. Can be suppressed.

  In the said embodiment, as shown in FIG. 12, although the positioning part 64 and the type | mold side positioning part 84A have comprised circular shape, it is not limited to this. For example, the positioning portion and the mold-side positioning portion may have an oval shape, an oval shape, or a polygonal shape. When the positioning portion or the mold side positioning portion has an oval shape, an oval shape, or a polygonal shape, the center of the positioning portion or the mold side positioning portion is viewed from the direction orthogonal to the sheet material (sensor operation portion). It means the center of gravity of the positioning portion or the mold side positioning portion.

  In the embodiment, the sheet member 62 of the cushion member 60 has the four positioning portions 64A in the vicinity of the periphery of the sensor operation portion 63, but the present invention is not limited to this. For example, the number of positioning portions provided in the vicinity of the periphery of the sensor operation portion may be two, three, or five or more. Further, the positioning portion may be configured of a permanent magnet. Further, the positioning portion may be formed in a hole shape, and may be configured to engage with the convex mold side positioning portion. Moreover, although the sheet material 62 which consists of a nonwoven fabric (cloth) was illustrated in the said embodiment, it is not limited to this, For example, a sheet made of resin etc. may be sufficient as a sheet material.

  Although the seat spring 20, the connecting member 30F, the occupant detection sensor 40, and the flat spring member 50 are provided in the seat cushion S1 in the above embodiment, the present invention is not limited thereto. For example, a seat spring, a connection member (sensor support member / opposing member), an occupant detection sensor, and a plate spring member (spring member) may be provided on the seat back. In this case, the front side corresponds to "the occupant side" and the rear side corresponds to "the opposite side to the occupant side".

  Although the vehicle seat S used in a car is illustrated as a vehicle seat in the above embodiment, the vehicle seat is not limited to this, and the vehicle seat may be a vehicle other than a car, for example, a rail car, a ship, or an aircraft. It may be a sheet used.

Reference Signs List 20 seat spring 30F connecting member 40 occupant detection sensor 60 cushion member 61 pad member 62 seat material 62A area 62B wrinkles 63 sensor operating unit 64A positioning unit 80 molding die 81 first die 82 second die F seat frame S vehicle seat

Claims (8)

A cushioning member for a vehicle seat configured to detect the presence or absence of an occupant by activating an occupant detection sensor when the occupant is seated,
A pad material and a sheet material disposed on the surface opposite to the occupant side of the pad material, and molded by pouring and solidifying the material of the pad material in a state where the sheet material is positioned with respect to a mold And
The sheet material is a portion that can contact the occupant detection sensor, and a sensor operation unit that contacts the occupant detection sensor and operates the occupant detection sensor when the occupant is seated; and a periphery of the sensor operation unit provided, it has a plurality of positioning portions for positioning the sheet material relative to said mold,
The plurality of positioning units include a first positioning unit and a second positioning unit,
A cushioning member for a vehicle seat, wherein the first positioning portion and the second positioning portion are disposed sandwiching the sensor operation portion . A cushioning member for a vehicle seat configured to detect the presence or absence of an occupant by activating an occupant detection sensor when the occupant is seated,
A pad material and a sheet material disposed on the surface opposite to the occupant side of the pad material, and molded by pouring and solidifying the material of the pad material in a state where the sheet material is positioned with respect to a mold And
The sheet material is a portion that can contact the occupant detection sensor, and a sensor operation unit that contacts the occupant detection sensor and operates the occupant detection sensor when the occupant is seated; and a periphery of the sensor operation unit provided, it has a plurality of positioning portions for positioning the sheet material relative to said mold,
The cushioning member for a vehicle seat, wherein the plurality of positioning portions are disposed at positions surrounding the sensor operation portion . A cushioning member for a vehicle seat configured to detect the presence or absence of an occupant by activating an occupant detection sensor when the occupant is seated,
A pad material and a sheet material disposed on the surface opposite to the occupant side of the pad material, and molded by pouring and solidifying the material of the pad material in a state where the sheet material is positioned with respect to a mold And
The sheet material is a portion that can contact the occupant detection sensor, and a sensor operation unit that contacts the occupant detection sensor and operates the occupant detection sensor when the occupant is seated; and a periphery of the sensor operation unit provided, it has a plurality of positioning portions for positioning the sheet material relative to said mold,
The said positioning part is arrange | positioned in the position which avoided the said passenger | crew detection sensor, The cushion member of the vehicle seat characterized by the above-mentioned . A cushioning member for a vehicle seat configured to detect the presence or absence of an occupant by activating an occupant detection sensor when the occupant is seated,
A pad material and a sheet material disposed on the surface opposite to the occupant side of the pad material, and molded by pouring and solidifying the material of the pad material in a state where the sheet material is positioned with respect to a mold And
The sheet material is a portion that can contact the occupant detection sensor, and a sensor operation unit that contacts the occupant detection sensor and operates the occupant detection sensor when the occupant is seated; and a periphery of the sensor operation unit provided, it has a plurality of positioning portions for positioning the sheet material relative to said mold,
The vehicle seat includes a seat frame, and a plurality of seat springs mounted on the seat frame so as to face the sheet material.
The cushioning member for a vehicle seat, wherein the positioning portion is disposed at a position avoiding the plurality of seat springs . A cushioning member for a vehicle seat configured to detect the presence or absence of an occupant by activating an occupant detection sensor when the occupant is seated,
A pad material and a sheet material disposed on the surface opposite to the occupant side of the pad material, and molded by pouring and solidifying the material of the pad material in a state where the sheet material is positioned with respect to a mold And
The sheet material is a portion that can contact the occupant detection sensor, and a sensor operation unit that contacts the occupant detection sensor and operates the occupant detection sensor when the occupant is seated; and a periphery of the sensor operation unit provided, it has a plurality of positioning portions for positioning the sheet material relative to said mold,
The vehicle seat includes a sensor support member to which the occupant detection sensor is attached, and when the occupant sits down, the occupant detection sensor detects the occupant by being pinched between the cushion member and the sensor support member. Configured to
The said positioning part is arrange | positioned in the position which avoided the said sensor support member, The cushion member of the vehicle seat characterized by the above-mentioned . A cushioning member for a vehicle seat configured to detect the presence or absence of an occupant by activating an occupant detection sensor when the occupant is seated,
A pad material and a sheet material disposed on the surface opposite to the occupant side of the pad material, and molded by pouring and solidifying the material of the pad material in a state where the sheet material is positioned with respect to a mold And
The sheet material is a portion that can contact the occupant detection sensor, and a sensor operation unit that contacts the occupant detection sensor and operates the occupant detection sensor when the occupant is seated; and a periphery of the sensor operation unit provided, it has a plurality of positioning portions for positioning the sheet material relative to said mold,
A cushioning member for a vehicle seat, wherein the area surrounded by the plurality of positioning portions is less wrinkled than the outside of the area . A cushioning member for a vehicle seat configured to detect the presence or absence of an occupant by activating an occupant detection sensor when the occupant is seated,
A pad material and a sheet material disposed on the surface opposite to the occupant side of the pad material, and molded by pouring and solidifying the material of the pad material in a state where the sheet material is positioned with respect to a mold And
The sheet material is a portion that can contact the occupant detection sensor, and a sensor operation unit that contacts the occupant detection sensor and operates the occupant detection sensor when the occupant is seated; and a periphery of the sensor operation unit provided, it has a plurality of positioning portions for positioning the sheet material relative to said mold,
A cushioning member for a vehicle seat, wherein a region surrounded by the plurality of positioning portions is stronger in tension than the outside of the region . The positioning unit, vehicle seat cushion member according to any one of claims 1 to 7, characterized in that it comprises a ferromagnetic material.

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