Vehicle seat

Abstract

[Problem] To provide a vehicle seat capable of reducing the work load when a pressure-receiving part is removed from a seat frame. [Solution] A vehicle seat (1) comprises: a seat frame (13); a flexible pressure-receiving part (14) supported inside the seat frame so as to support a seated person; a first wire harness (51) attached to the seat frame, an end part of the first wire harness (51) being provided with a first connector (61); and a second wire harness (52) attached to the pressure-receiving part, an end part of the second wire harness (52) being provided with a second connector (62) that can be connected to the first connector. The first wire harness may be attached to a seat cushion frame (13A), and the second wire harness may be attached to a seat cushion pressure-receiving part (14A).

Description

Vehicle seats

[0001] The present invention relates to a vehicle seat.

[0002] A vehicle seat is provided with an electrical device including an electric motor, a heater, various sensors, and a control device, and a wire harness connecting the electrical device. Patent Document 1 discloses a vehicle seat in which the wire harness is disposed on the back surface of the seat cushion. The wire harness is fixed to a seat frame and a pressure receiving portion supported by the seat frame to support an occupant.

[0003] International Publication WO2020 / 158671A1

[0004] When a wire harness is fixed to both the seat frame and the pressure receiving portion, the wire harness must be removed from both the seat frame and the pressure receiving portion when the pressure receiving portion is removed from the seat frame, which increases the workload when dismantling the seat.

[0005] In view of the above background, an object of the present invention is to provide a vehicle seat that can reduce the workload when removing a pressure-receiving portion from a seat frame.

[0006] In order to solve the above problem, one aspect of the present invention is a vehicle seat (1) having a seat frame (13), a flexible pressure-receiving portion (14) supported inside the seat frame to support an occupant, a first wire harness (51) attached to the seat frame and having a first connector (61) at an end thereof, and a second wire harness (52) attached to the pressure-receiving portion and having a second connector (62) at an end thereof that can be connected to the first connector.

[0007] According to this aspect, by separating the first connector from the second connector, the second wire harness can be removed from the seat frame together with the pressure receiving portion. In other words, when removing the pressure receiving portion from the seat frame, it is not necessary to remove the second wire harness from the pressure receiving portion. This makes it possible to provide a vehicle seat that reduces the workload when removing the pressure receiving portion from the seat frame.

[0008] In the above aspect, the first connector may be attached to the seat frame.

[0009] According to this aspect, the positions of the first connector and the second connector can be fixed.

[0010] In the above aspect, the second connector may be attached to the pressure-receiving portion.

[0011] According to this aspect, the positions of the first connector and the second connector can be fixed.

[0012] In the above aspect, the seat frame may include a seat cushion frame (13A) that constitutes a seat cushion (11) and a seat back frame (13B) that constitutes a seat back (12), the pressure receiving portion may include a seat cushion pressure receiving portion (14A) supported on the inside of the seat cushion frame and a seat back pressure receiving portion (14B) supported on the inside of the seat back frame, and the first wire harness may be attached to the seat cushion frame and the second wire harness may be attached to the seat cushion pressure receiving portion.

[0013] According to this aspect, by separating the first connector from the second connector, the second wire harness can be removed from the seat cushion frame together with the seat cushion pressure receiving portion.

[0014] In the above aspect, the second wire harness may have a third connector (63), and a third wire harness (53) having a fourth connector (67) connectable to the third connector may be attached to the seat back pressure receiving portion.

[0015] According to this aspect, by separating the third connector from the fourth connector, the second wire harness can be removed from the seat cushion frame together with the seat cushion pressure receiving portion.

[0016] In the above aspect, the third connector may be attached to the seat cushion pressure receiving portion.

[0017] According to this aspect, the positions of the third connector and the fourth connector can be fixed.

[0018] In the above aspect, the fourth connector may be attached to the seat back pressure receiving portion.

[0019] According to this aspect, the positions of the third connector and the fourth connector can be fixed.

[0020] In the above aspect, the seat cushion pressure receiving portion may have a flexible metal wire (35) stretched across the seat cushion frame and a flexible resin plate (36) supported by the metal wire, and the first wire harness may be connected to a control device (45) provided on the seat frame, and the second wire harness may be connected to a seating sensor (46) provided on the plate.

[0021] According to this aspect, the seating sensor and the second wire harness can be removed from the seat cushion frame together with the seat cushion pressure receiving portion.

[0022] In the above aspect, the first wire harness is connected to the seat frame by a clip, and the clip has a main body portion (73) in which a band locking hole (72) is formed, a band portion (74) extending from the main body portion and capable of inserting into the band locking hole, and an engagement portion (75) protruding from the main body portion and engaging with an engagement hole (71) which is a through hole formed in the seat frame, and the first wire harness is supported by the band portion, and the band portion has a fracture origin portion (81) which is a fracture origin and a tab (82) protruding from the fracture origin portion.

[0023] According to this aspect, an operator can break the band portion by pulling the tab, and can easily remove the first wire harness from the seat frame.

[0024] In the above aspect, the first wire harness is coupled to the seat frame by a clip (55), the clip having a main body portion (73) in which a band locking hole (72) is formed, a band portion (74) extending from the main body portion and capable of inserting into the band locking hole, and an engaging portion (75) protruding from the main body portion and engaging with an engaging hole (71) which is a through hole formed in the seat frame, the first wire harness being supported by the band portion, the engaging portion having a shaft portion (77) extending from the main body portion and inserting into the engaging hole, a flange portion (78) provided on the shaft portion and abutting against the seat frame, and an elastic claw (79) extending from the shaft portion toward the main body portion and engaging with an edge of the engaging hole, the flange portion having a slot (85) penetrating in the extension direction of the shaft portion, and the tip of the elastic claw passing through the slot and protruding toward the main body portion further than the flange portion.

[0025] According to this aspect, an operator can remove the clip from the engagement hole by pressing the tip of the elastic claw, and can easily remove the first wire harness from the seat frame.

[0026] In the above aspect, the first wire harness is coupled to the seat frame by a clip (55), the clip having a main body portion (73) in which a band locking hole (72) is formed, a band portion (74) extending from the main body portion and capable of inserting into the band locking hole, and an engaging portion (75) protruding from the main body portion and engaging with an engaging hole (71) which is a through hole formed in the seat frame, the first wire harness being supported by the band portion, the engaging portion having a shaft portion (77) extending from the main body portion and inserting into the engaging hole, a flange portion (78) provided on the shaft portion and abutting against the seat frame, and an elastic claw (79) extending from the shaft portion toward the main body portion and engaging with an edge of the engaging hole, and the shaft portion may be provided with a fragile portion (87) that breaks when a torsional load is applied to the shaft portion.

[0027] According to this aspect, the worker can break the clip by twisting the clip, and the first wire harness can be easily removed from the seat frame.

[0028] One aspect of the present invention is a vehicle seat (1) comprising a seat frame (13), a flexible pressure-receiving portion (14) supported inside the seat frame to support an occupant, a first wire harness (51) attached to the seat frame and having a first connector (61) at an end thereof, and a second wire harness (52) attached to the pressure-receiving portion and having a second connector (62) at an end thereof that can be connected to the first connector.

[0029] According to this aspect, by separating the first connector from the second connector, the second wire harness can be removed from the seat frame together with the pressure receiving portion. In other words, when removing the pressure receiving portion from the seat frame, it is not necessary to remove the second wire harness from the pressure receiving portion. This makes it possible to provide a vehicle seat that reduces the workload when removing the pressure receiving portion from the seat frame.

[0030] In the above aspect, the first connector may be attached to the seat frame.

[0031] According to this aspect, the positions of the first connector and the second connector can be fixed.

[0032] In the above aspect, the second connector may be attached to the pressure-receiving portion.

[0033] According to this aspect, the positions of the first connector and the second connector can be fixed.

[0034] In the above aspect, the seat frame may include a seat cushion frame (13A) that constitutes a seat cushion (11) and a seat back frame (13B) that constitutes a seat back (12), the pressure receiving portion may include a seat cushion pressure receiving portion (14A) supported on the inside of the seat cushion frame and a seat back pressure receiving portion (14B) supported on the inside of the seat back frame, and the first wire harness may be attached to the seat cushion frame and the second wire harness may be attached to the seat cushion pressure receiving portion.

[0035] According to this aspect, by separating the first connector from the second connector, the second wire harness can be removed from the seat cushion frame together with the seat cushion pressure receiving portion.

[0036] In the above aspect, the second wire harness may have a third connector (63), and a third wire harness (53) having a fourth connector (67) connectable to the third connector may be attached to the seat back pressure receiving portion.

[0037] According to this aspect, by separating the third connector from the fourth connector, the second wire harness can be removed from the seat cushion frame together with the seat cushion pressure receiving portion.

[0038] In the above aspect, the third connector may be attached to the seat cushion pressure receiving portion.

[0039] According to this aspect, the positions of the third connector and the fourth connector can be fixed.

[0040] In the above aspect, the fourth connector may be attached to the seat back pressure receiving portion.

[0041] According to this aspect, the positions of the third connector and the fourth connector can be fixed.

[0042] In the above aspect, the seat cushion pressure receiving portion may have a flexible metal wire (35) stretched across the seat cushion frame and a flexible resin plate (36) supported by the metal wire, and the first wire harness may be connected to a control device (45) provided on the seat frame, and the second wire harness may be connected to a seating sensor (46) provided on the plate.

[0043] According to this aspect, the seating sensor and the second wire harness can be removed from the seat cushion frame together with the seat cushion pressure receiving portion.

[0044] In the above aspect, the first wire harness is connected to the seat frame by a clip, and the clip has a main body portion (73) in which a band locking hole (72) is formed, a band portion (74) extending from the main body portion and capable of inserting into the band locking hole, and an engagement portion (75) protruding from the main body portion and engaging with an engagement hole (71) which is a through hole formed in the seat frame, and the first wire harness is supported by the band portion, and the band portion has a fracture origin portion (81) which is a fracture origin and a tab (82) protruding from the fracture origin portion.

[0045] According to this aspect, an operator can break the band portion by pulling the tab, and can easily remove the first wire harness from the seat frame.

[0046] In the above aspect, the first wire harness is coupled to the seat frame by a clip (55), the clip having a main body portion (73) in which a band locking hole (72) is formed, a band portion (74) extending from the main body portion and capable of inserting into the band locking hole, and an engaging portion (75) protruding from the main body portion and engaging with an engaging hole (71) which is a through hole formed in the seat frame, the first wire harness being supported by the band portion, the engaging portion having a shaft portion (77) extending from the main body portion and inserting into the engaging hole, a flange portion (78) provided on the shaft portion and abutting against the seat frame, and an elastic claw (79) extending from the shaft portion toward the main body portion and engaging with an edge of the engaging hole, the flange portion having a slot (85) penetrating in the extension direction of the shaft portion, and the tip of the elastic claw passing through the slot and protruding toward the main body portion further than the flange portion.

[0047] According to this aspect, an operator can remove the clip from the engagement hole by pressing the tip of the elastic claw, and can easily remove the first wire harness from the seat frame.

[0048] In the above aspect, the first wire harness is coupled to the seat frame by a clip (55), the clip having a main body portion (73) in which a band locking hole (72) is formed, a band portion (74) extending from the main body portion and capable of inserting into the band locking hole, and an engaging portion (75) protruding from the main body portion and engaging with an engaging hole (71) which is a through hole formed in the seat frame, the first wire harness being supported by the band portion, the engaging portion having a shaft portion (77) extending from the main body portion and inserting into the engaging hole, a flange portion (78) provided on the shaft portion and abutting against the seat frame, and an elastic claw (79) extending from the shaft portion toward the main body portion and engaging with an edge of the engaging hole, and the shaft portion may be provided with a fragile portion (87) that breaks when a torsional load is applied to the shaft portion.

[0049] According to this aspect, the worker can break the clip by twisting the clip, and the first wire harness can be easily removed from the seat frame.

[0050] A perspective view of a seat according to an embodiment. A bottom view of a seat. A perspective view of a clip. A side view of a clip. A cross-sectional view of a clip according to a modified example. A side view of a clip according to a modified example. An explanatory diagram of an electric actuator. An explanatory diagram of an electric actuator. A front view of an upper part of a seat back according to another embodiment. An explanatory diagram showing the inside of a headrest. An explanatory diagram of an example of a wire harness. An explanatory diagram of an example of a wire harness.

[0051] Hereinafter, an embodiment in which the vehicle seat of the present invention is applied to a vehicle seat will be described with reference to the drawings. In this embodiment, an example in which the seat is the left seat of an automobile will be described.

[0052] 1, the seat 1 has slide rails 3 connected to the floor 2 of the vehicle and a seat body 4 supported by the slide rails 3. The slide rails 3 have left and right rails 6 (lower rails) connected to the floor 2 and left and right sliders (upper rails) slidably supported on the left and right rails 6, respectively. Each rail 6 extends in the front-to-rear direction.

[0053] The seat body 4 includes a seat cushion 11 that supports the buttocks of the occupant from below, and a seat back 12 that supports the back of the occupant from behind. The seat back 12 is supported on the rear of the seat cushion 11 so as to be rotatable.

[0054] The seat body 4 has a seat frame 13 and a flexible pressure-receiving portion 14 that is supported inside the seat frame 13 to support a seated occupant. The seat body 4 also has a pad that is supported by the seat frame 13 and the pressure-receiving portion 14, and a covering material that covers the surface of the pad.

[0055] The seat frame 13 includes a seat cushion frame 13A that constitutes the seat cushion 11 and a seat back frame 13B that constitutes the seat back 12. The pressure receiving portion 14 includes a seat cushion pressure receiving portion 14A that is supported on the inside of the seat cushion frame 13A and a seat back pressure receiving portion 14B that is supported on the inside of the seat back frame 13B.

[0056] The seat cushion frame 13A includes left and right seat cushion side members 21 extending in the front-rear direction, a front member 22 extending in the left-right direction and connected to the front ends of the left and right seat cushion side members 21, a rear member 23 extending in the left-right direction and connected to the rear ends of the left and right seat cushion side members 21, and a seat cushion intermediate member 24 extending in the left-right direction behind the front member 22 and connected to intermediate portions of the left and right seat cushion side members 21. The front member 22 may be a pan frame formed in a flat plate shape. The left and right seat cushion side members 21 are connected to corresponding sliders on the left and right.

[0057] The seatback frame 13B has left and right seatback side members 26 that extend vertically, an upper member 27 that extends horizontally and is joined to the upper ends of the left and right seatback side members 26, a lower member 28 that extends horizontally and is joined to the lower ends of the left and right seatback side members 26, and a seatback intermediate member 29 that extends horizontally below the upper member 27 and is joined to intermediate portions of the left and right seatback side members 26. The lower ends of the left and right seatback side members 26 are supported by the rear ends of the corresponding seat cushion side members 21 on the left and right via reclining devices 31.

[0058] The reclining device 31 changes the angle of the left and right seatback side members 26 relative to the left and right seat cushion side members 21. The reclining device 31 is driven by an electric actuator 32. The electric actuator 32 is provided on the inner surface of one of the left and right seatback side members 26.

[0059] The seat cushion pressure receiving portion 14A is spanned between the seat cushion intermediate member 24 and the rear member 23. The seat cushion pressure receiving portion 14A has a flexible metal wire 35 spanned across the seat cushion frame 13A and a flexible resin plate 36 supported by the metal wire 35. The metal wire 35 is preferably a wire spring. The metal wire 35 is preferably insert-molded into the plate 36. A front hook 37 that hooks onto the seat cushion intermediate member 24 is provided at the front end of the seat cushion pressure receiving portion 14A. A rear hook 38 that hooks onto the rear member 23 is provided at the rear end of the seat cushion pressure receiving portion 14A.

[0060] The seatback pressure receiving portion 14B is bridged between the seatback intermediate member 29 and the lower member 28. The seatback pressure receiving portion 14B has a flexible metal wire 41 bridged across the seatback frame 13B and a flexible resin plate 42 supported by the metal wire 41. The metal wire 41 is preferably a wire spring. The metal wire 41 is preferably insert-molded into the plate 42. The seat cushion pressure receiving portion 14A is preferably engaged with the seatback intermediate member 29 and the lower member 28 at the metal wire 41.

[0061] The seat body 4 is provided with various electrical devices and wire harnesses connected to the electrical devices. The electrical devices include, for example, a control device, sensors, an electric motor, an electric fan, an electric compressor, an electric heater, etc. The sensors include a seating sensor, a reclining angle sensor, a heart rate sensor, a temperature sensor, etc. In this embodiment, the seat body 4 is provided with a control device 45, a seating sensor 46, and an electric actuator 32 as electrical devices.

[0062] The control device 45 is an electronic control unit (ECU) that includes a processor such as a CPU, a non-volatile memory (ROM), and a volatile memory (RAM). The control device 45 executes various applications by executing arithmetic processing in the processor according to programs stored in the non-volatile memory. As shown in FIG. 2, the control device 45 is preferably provided in the seat frame 13. In this embodiment, the control device 45 is coupled to the underside of the front member 22.

[0063] 1 and 2, the seating sensor 46 may be a pressure sensor or a pressure-sensitive switch. The seating sensor 46 is provided for the purpose of detecting whether or not a person is seated in the seat 1. The seating sensor 46 outputs an electric signal in response to the load received. In this embodiment, the seating sensor 46 is provided on the upper surface of the seat cushion pressure-receiving portion 14A. In other embodiments, the seating sensor 46 may be provided between the pad and the cover material of the seat cushion 11.

[0064] 2 , the control device 45 and the seating sensor 46 are connected by a first wire harness 51 and a second wire harness 52. The control device 45 and the electric actuator 32 of the reclining device 31 are connected by the first wire harness 51, the second wire harness 52, and a third wire harness 53. Each of the first wire harness 51, the second wire harness 52, and the third wire harness 53 may be a single wire harness or may be a bundle of multiple wire harnesses. In this embodiment, each of the first wire harness 51, the second wire harness 52, and the third wire harness 53 is a bundle of multiple wire harnesses.

[0065] The first wire harness 51 is attached to the seat frame 13. Specifically, the first wire harness 51 is coupled to the underside of the front member 22 by a plurality of clips 55. One end of the first wire harness 51 is connected to the control device 45. A first connector 61 is provided at the other end of the first wire harness 51.

[0066] The second wire harness 52 is attached to the seat cushion pressure receiving portion 14A. Specifically, the second wire harness 52 is connected to the underside of the plate 36 of the seat cushion pressure receiving portion 14A by a plurality of clips 55. A second connector 62 is provided at one end of the second wire harness 52. The second connector 62 is electrically and mechanically connectable to the first connector 61. A third connector 63 is provided at the other end of the second wire harness 52.

[0067] The second wire harness 52 has a branch portion 52A connected to the seat occupancy sensor 46. The plate 36 of the seat cushion pressure receiving portion 14A has a through hole 65 that penetrates vertically. The branch portion 52A passes through the through hole 65 and extends to the upper surface of the plate 36, and is connected to the seat occupancy sensor 46.

[0068] The first connector 61 is preferably attached to the seat frame 13. Specifically, the first connector 61 is preferably attached to the underside of the front member 22. This determines the position of the first connector 61. At this time, the second connector 62 is preferably a free end. The position of the second connector 62 is determined by connecting the second connector 62 to the first connector 61. For example, the first connector 61 may be provided with an engagement claw that engages with an engagement hole 71 formed in the front member 22.

[0069] In another embodiment, the second connector 62 may be attached to the seat cushion pressure receiving portion 14A. Specifically, the second connector 62 may be coupled to the lower surface of the plate 36 of the seat cushion pressure receiving portion 14A. This determines the position of the second connector 62. In this case, it is preferable that the first connector 61 has a free end. The position of the first connector 61 is determined by connecting the first connector 61 to the second connector 62. For example, it is preferable that a locking claw for locking the second connector 62 is provided on the lower surface of the plate 36 of the seat cushion pressure receiving portion 14A.

[0070] The third wire harness 53 is attached to the seat back pressure receiving portion 14B. A fourth connector 67 is provided at one end of the third wire harness 53. The fourth connector 67 is electrically and mechanically connectable to the third connector 63. The other end of the third wire harness 53 is connected to the electric actuator 32.

[0071] The third connector 63 may be attached to the seat cushion pressure receiving portion 14A. Specifically, the third connector 63 may be coupled to the underside of the plate 36 of the seat cushion pressure receiving portion 14A. This determines the position of the third connector 63. At this time, the fourth connector 67 may be a free end. The position of the fourth connector 67 is determined by connecting the fourth connector 67 to the third connector 63. For example, a locking claw for locking the third connector 63 may be provided on the underside of the plate 36 of the seat cushion pressure receiving portion 14A.

[0072] In another embodiment, the fourth connector 67 may be attached to the seat back pressure receiving portion 14B. Specifically, the fourth connector 67 may be coupled to the rear surface of the plate 36 of the seat back pressure receiving portion 14B. This determines the position of the fourth connector 67. In this case, the third connector 63 preferably has a free end. The position of the third connector 63 is determined by connecting the third connector 63 to the fourth connector 67. For example, a locking claw for locking the fourth connector 67 may be provided on the rear surface of the plate 36 of the seat back pressure receiving portion 14B.

[0073] An example of the clip 55 will be described below. As shown in Figures 3 and 4, the clip 55 is used to fasten the wire harnesses 51 to 53 to the seat frame 13 or the pressure-receiving portion 14. The clip 55 releases the wire harnesses 51 to 53 from the seat frame 13 when subjected to a predetermined operation. The clip 55 engages with an engagement hole 71, which is a through-hole formed in the seat frame 13. The engagement hole 71 may be formed in the front member 22, the seat cushion side member 21, the lower member 28, etc.

[0074] The clip 55 has a main body portion 73 in which a band locking hole 72 is formed, a band portion 74 extending from the main body portion 73 and capable of inserting into the band locking hole 72, and an engagement portion 75 protruding from the main body portion 73 and engaging with the engagement hole 71. The engagement portion 75 has a shaft portion 77 extending from the main body portion 73 and inserting into the engagement hole 71, a flange portion 78 provided on the shaft portion 77 and abutting against the seat frame 13, and a resilient claw 79 extending from the shaft portion 77 toward the main body portion 73 and engaging with the edge of the engagement hole 71. The resilient claw 79 extends from the tip of the shaft portion 77 toward the main body portion 73 and is inclined in a direction away from the shaft portion 77 toward the main body portion 73. When the engagement portion 75 is inserted into the engagement hole 71, the resilient claw 79 is pressed by the edge of the engagement hole 71 and bends toward the shaft, allowing the engagement portion 75 to be inserted into the engagement hole 71. After the engaging portion 75 is inserted into the engaging hole 71 , the elastic claw 79 catches on the edge of the engaging hole 71 , thereby preventing the engaging portion 75 from coming off the engaging hole 71 .

[0075] The band locking hole 72 extends in a direction perpendicular to the shaft portion 77 and penetrates the main body portion 73. A check claw 76 is provided in the band locking hole 72. The check claw 76 allows the band portion 74 to be inserted while preventing the band portion 74 from slipping out. The band portion 74 may be provided with a plurality of claws along the longitudinal direction of the band portion 74 that are engaged with the check claw 76. The band portion 74 is inserted into the band locking hole 72 to form a ring structure. The wire harnesses 51 to 53 are supported within the ring structure of the band portion 74.

[0076] The flange portion 78 abuts against the periphery of the engagement hole 71, thereby determining the length of insertion of the shaft portion 77 into the engagement hole 71. In other words, the position of the clip 55 relative to the seat frame 13 is determined.

[0077] The band portion 74 has a fracture origin 81, which serves as a fracture origin, and a tab 82 protruding from the fracture origin 81. The fracture origin 81 is preferably a notch formed on the edge of the band portion 74. The fracture origin 81 is preferably formed at the base end of the band portion 74, i.e., near the main body portion 73. The tab 82 is preferably provided on the side edge of the band portion 74 opposite the side edge on which the fracture origin 81 is provided. An operator can apply a shear force to the fracture origin 81 by pulling on the side edge, thereby breaking the band portion 74 starting from the fracture origin 81.

[0078] A manufacturing method of the seat 1 will be described. The manufacturing method of the seat 1 includes a step of attaching the pressure receiving portion 14 to the seat frame 13, a step of attaching a first wire harness 51 to the seat frame 13, a step of attaching a second wire harness 52 to the pressure receiving portion 14, and a step of connecting a first connector 61 of the first wire harness 51 to a second connector 62 of the second wire harness 52. The seat frame 13 may be the front member 22, and the pressure receiving portion 14 may be the seat cushion pressure receiving portion 14A. The manufacturing method of the seat 1 may include a step of connecting the first wire harness 51 to a control device 45 and a step of attaching the control device 45 to the front member 22. The manufacturing method of the seat 1 may also include a step of connecting the second wire harness 52 to a seat occupancy sensor 46 and a step of attaching the seat occupancy sensor 46 to the seat cushion pressure receiving portion 14A. The manufacturing method of the seat 1 may include a step of attaching the third wire harness 53 to the seatback pressure receiving portion 14B, and a step of connecting the third connector 63 and the fourth connector 67.

[0079] The method for dismantling the seat 1 will now be described. First, the worker removes the covering material and padding from the seat cushion 11 and the seat back 12 to expose the seat frame 13 and the pressure-receiving portion 14. Next, the worker separates the first connector 61 from the second connector 62, and also separates the third connector 63 from the fourth connector 67. Next, the worker removes the seat cushion pressure-receiving portion 14A together with the second wire harness 52 from the seat cushion frame 13A.

[0080] The worker pulls the tab 82 of the clip 55 to break the band portion 74 of the clip 55 and remove the first wire harness 51 from the clip 55. Next, the worker may remove the control device 45 together with the first wire harness 51 from the front member 22.

[0081] According to the seat 1 described above, by separating the first connector 61 and the second connector 62, the second wire harness 52 can be removed integrally with the seat cushion pressure receiving portion 14A from the seat cushion frame 13A. In other words, when removing the seat cushion pressure receiving portion 14A from the seat cushion frame 13A, it is not necessary to remove the second wire harness 52 from the seat cushion pressure receiving portion 14A. This makes it possible to provide a seat 1 that reduces the workload required when removing the seat cushion pressure receiving portion 14A from the seat cushion frame 13A. Furthermore, because the seat occupancy sensor 46 is provided in the seat cushion pressure receiving portion 14A, an operator can remove the seat occupancy sensor 46 together with the seat cushion pressure receiving portion 14A from the seat cushion frame 13A.

[0082] The worker can break the band portion 74 by pulling the tab 82 of the clip 55. This allows the worker to easily remove the first wire harness 51 from the seat cushion frame 13A.

[0083] Although the specific embodiment has been described above, the present invention is not limited to the above embodiment and can be widely modified. For example, the clip 55 can have various structures. As shown in FIG. 5 , a slot 85 may be formed in the flange portion 78 of the clip 55, penetrating the shaft portion 77 in the extension direction. The tips of the elastic claws 79 may pass through the slot 85 and protrude further toward the main body portion 73 than the flange portion 78. A pair of slots 85 may be provided corresponding to each pair of elastic claws 79. With this configuration, when the engaging portions 75 of the clip 55 are engaged with the engaging holes 71, the tips of the elastic claws 79 pass through the engaging holes 71 and protrude outward from the flange portion 78. Therefore, by deforming the tips of the pair of elastic claws 79 toward the shaft portion 77, an operator can release the engagement between the pair of elastic claws 79 and the edge of the engaging hole 71, allowing the engaging portions 75 to be removed from the engaging hole 71. This allows the first wire harness 51 to be removed from the front member 22. In this case, the breakage starting point 81 and the tab 82 may be omitted.

[0084] In another embodiment, as shown in FIG. 6 , the shaft portion 77 may be provided with a weakened portion 87 that breaks when a torsional load is applied to the shaft portion 77. In this case, the shaft portion 77 is non-rotatably engaged with the engagement hole 71. For example, the engagement hole 71 may be formed as a rectangular hole, such as a square hole, and the shaft portion 77 may be formed as a rectangular column that fits into the engagement hole 71. The weakened portion 87 may be a notch, groove, or through-hole formed in the surface of the shaft portion 77. An operator can grasp the main body portion 73 of the clip 55 and twist the main body portion 73 about the axis of the shaft portion 77, thereby breaking the shaft portion 77 at the weakened portion 87. This allows the operator to remove the first wire harness 51 from the front member 22.

[0085] As shown in FIG. 7 , the electric actuator 32 includes an electric motor 32A and a reducer 32B that reduces the driving force of the electric motor 32A. A yoke 32D of the electric motor 32A is coupled to a case 32C of the reducer 32B. The yoke 32D may be fastened to the case 32C with bolts. The rotor of the electric motor 32A is rotatably supported by the case 32C and the yoke 32D. The case 32C is coupled to the inner surface of the left seatback side member 26. A fracture origin 91 is formed in the case 32C. The fracture origin 91 is located around the periphery of the joint with the yoke 32D. The fracture origin 91 may be a notch, a groove, or a thin-walled portion. An operator can fracture the case 32C at the fracture origin 91 by applying a load to the yoke 32D. This allows the yoke 32D to be removed from the case 32C, and the rotor to be recovered. The rotor contains copper wire that forms the coils.

[0086] The yoke 32D is provided with a tool engagement portion 32F. An operator may couple a tool to the tool engagement portion 32F and apply a load to the yoke 32D via the tool. The tool engagement portion 32F may be a hole into which the tip of a rod-shaped tool such as a screwdriver or crowbar can be hooked. The tool engagement portion 32F may also have a shaft portion 77 that can be inserted into a hole provided at the tip of the tool.

[0087] 8, the electric actuator 32 may be provided on the outer surface of the seatback side member 26. In this case, access to the electric actuator 32 becomes easier, and dismantling work becomes easier.

[0088] Japanese Patent Publication No. 2018-188137 discloses a vehicle seat in which a speaker and a microphone are provided in the headrest. In such a vehicle seat, a control device for the headrest and microphone may be provided in the seat cushion or the seat back. In this case, a headrest pillar extending from the headrest to the seat back may be formed by a pipe, and a wire harness connecting the speaker and microphone to the control device may be disposed within the pipe. However, if the connector (coupler) provided at the end of the wire harness is large, the connector cannot enter the headrest pillar, making it impossible to pass the wire harness through the headrest pillar. Another embodiment aims to provide a vehicle seat in which the wire harness can be passed through the headrest pillar.

[0089] A vehicle seat 100 according to another embodiment has a configuration similar to that of the seat 1 according to the above embodiment. In the seat 100 according to the following embodiment, the same components as those of the seat 1 are denoted by the same reference numerals and the description thereof will be incorporated herein.

[0090] 9, the seatback frame 13B has left and right seatback side members 26 that extend vertically, and an upper member 27 that extends horizontally and is connected to the upper ends of the left and right seatback side members 26. A headrest 101 is provided on the upper part of the seatback 12.

[0091] As shown in FIGS. 9 and 10 , the headrest 101 includes left and right headrest pillars 103 extending vertically, connecting members 104 extending laterally and connected to the upper ends of the left and right headrest pillars 103, an electrical device 105 supported by the connecting members 104, a pad 106, and a cover material 107. The left and right headrest pillars 103 are formed of hollow pipe material and are open at their upper and lower ends. The electrical device 105 is a headset and includes left and right speakers 105A and left and right microphones 105B. The left and right microphones 105B may be attached to the lower parts of the corresponding left and right speakers 105A. The left and right speakers 105A and the left and right microphones 105B are integrally connected to each other by a base 105C to form a unit. The electrical device 105 may be connected to the upper parts of the left and right headrest pillars 103 or to the connecting members 104.

[0092] As shown in FIG. 9 , the lower portions of the left and right headrest pillars 103 protrude downward from the upholstery material 107. The upper member 27 is provided with left and right pillar support portions 108 that receive the lower portions of the left and right headrest pillars 103 so that they can move up and down. The left and right pillar support portions 108 are cylindrical and penetrate vertically. The lower portion of each headrest pillar 103 penetrates the corresponding pillar support portion 108. The lower portion of each headrest pillar 103 protrudes downward from the corresponding pillar support portion 108. As shown in FIG. 10 , a plurality of locking grooves 110 are formed on the side surface of the headrest pillar 103, and the pillar support portion 108 is provided with a locking claw 111 that can engage with one of the locking grooves 110. The height of the headrest 101 relative to the seat back 12 is determined by the locking claw 111 engaging with one of the locking grooves 110. In other embodiments, the headrest pillar 103 may be coupled to the pillar support 108 so as not to be movable up and down.

[0093] The electrical device 105 is connected to the control device 45 by a wire harness 120 that extends from the inside of the headrest 101 to the inside of the seat back 12 .

[0094] The wire harness 120 includes a first connector 121, a first wiring 122A, a second wiring 122B, a third wiring 122C, and a fourth wiring 122D extending from the first connector 121, a second connector 123A connected to the first wiring 122A, a third connector 123B connected to the second wiring 122B, a fourth connector 123C connected to the third wiring 122C, and a fifth connector 123D connected to the fourth wiring 122D. The first wiring 122A is formed longer than the second wiring 122B. As a result, the second connector 123A and the third connector 123B are arranged offset from each other in the longitudinal direction of the wire harness 120. The third wiring 122C is formed longer than the fourth wiring 122D. As a result, the fourth connector 123C and the fifth connector 123D are arranged offset from each other in the longitudinal direction of the wire harness 120.

[0095] The first wiring 122A and the second wiring 122B are covered with a first exterior member 125A. The third wiring 122C and the fourth wiring 122D are covered with a second exterior member 125B. The first exterior member 125A and the second exterior member 125B are flexible tubular members. The first exterior member 125A and the second exterior member 125B protect the first to fourth wirings 122A to 122D from external forces. The first exterior member 125A and the second exterior member 125B may be formed of, for example, resin. The first exterior member 125A and the second exterior member 125B may be, for example, corrugated tubes. As shown in FIG. 11 , the first exterior member 125A may have a hole 127A that exposes the second connector 123A to the outside. The second exterior member 125B may have a hole 127B that exposes the fourth connector 123C to the outside. In another embodiment, as shown in FIG. 12 , the second connector 123A and the third connector 123B may protrude outward from the end of the first exterior member 125A. That is, the first exterior member 125A is formed shorter than the second wiring 122B. Furthermore, the fourth connector 123C and the fifth connector 123D may protrude outward from the end of the second exterior member 125B. That is, the second exterior member 125B is formed shorter than the fourth wiring 122D. Furthermore, the first exterior member 125A and the second exterior member 125B may be formed as a single continuous exterior member. In this case, a hole 127C may be formed at the boundary between the first exterior member 125A and the second exterior member 125B, allowing the first to fourth wirings 122A to 122D to pass through.

[0096] 10 , the wire harness 120 branches from a first connector 121 into a set of first wiring 122A and second wiring 122B and a set of third wiring 122C and fourth wiring 122D. The first connector 121 is fixed to the connecting member 104. A branch portion 131 of the wire harness 120 may be formed in a T-shape or a Y-shape. The first connector 121 may be fixed to the center of the connecting member 104 in the left-right direction. The branch portion 131 may be disposed between the left end and the right end of the connecting member 104 in the left-right direction.

[0097] The first wiring 122A, the second wiring 122B, and the first exterior member 125A pass through the interior of one of the pair of headrest pillars 103. The third wiring 122C, the fourth wiring 122D, and the second exterior member 125B pass through the interior of the other of the pair of headrest pillars 103. The second to fifth connectors 123A to 123D are disposed inside the seat back 12.

[0098] An electrical equipment connector 133 is connected to four wires extending from the electrical equipment 105 and is connected to the first connector 121. The four wires are connected to left and right speakers 105A and left and right microphones 105B. The number of pins in the first connector 121 is equal to the total number of pins (terminals) in the second to fifth connectors 123A to 123D. For example, the first connector 121 has eight pins, and each of the second to fifth connectors 123A to 123D has two pins. The second connector 123A and the fourth connector 123C may have the same structure. The third connector 123B and the fifth connector 123D may have the same structure.

[0099] The first wiring 122A has a first protective member 135A at a portion corresponding to the third connector 123B. The first protective member 135A may be a tape wrapped around the outer periphery of the first wiring 122A or a flexible tube attached to the outer periphery of the first wiring 122A. The tube may be made of, for example, rubber. The first protective member 135A protects the first wiring 122A from external forces. This allows the first protective member 135A to protect the portion of the first wiring 122A that contacts the third connector 123B. The first protective member 135A may be provided over the entire length of the first wiring 122A, or may be provided only on the portion facing the third connector 123B.

[0100] The third wiring 122C has a second protective member 135B at a portion corresponding to the fifth connector 123D. The configuration of the second protective member 135B may be the same as that of the first protective member 135A. This allows the portion of the third wiring 122C that contacts the fifth connector 123D to be protected by the second protective member 135B. The second protective member 135B may be provided over the entire length of the third wiring 122C, or may be provided only on the portion facing the second connector 123A.

[0101] The combined width of the third connector 123B and the first wiring 122A provided with the first protective member 135A is smaller than the inner diameter of the headrest pillar 103. This allows the third connector 123B and the first wiring 122A provided with the first protective member 135A to pass through the inside of the headrest pillar 103 as a single unit.

[0102] The combined width of the fifth connector 123D and the third wiring 122C provided with the second protective member 135B is smaller than the inner diameter of the headrest pillar 103. This allows the third connector 123B and the third wiring 122C provided with the second protective member 135B to pass through the inside of the headrest pillar 103 as a single unit.

[0103] The second to fifth connectors 123A to 123D may be fixed to a bracket 137 provided on the seat back frame 13B. A blower 138 is attached to the bracket 137. The first to fourth wirings 122A to 122D protrude downward from the lower end of each headrest pillar 103, form loops 141, and are then fixed to the bracket 137 at the second to fifth connectors 123A to 123D. This prevents excessive tension from being applied to the first to fourth wirings 122A to 122D due to changes in the shape of the loops 141 even when the headrest pillar 103 moves up and down. The third wire harness 53 may be connected to the second to fifth connectors 123A to 123D. The second to fifth connectors 123A to 123D may also be fixed to harness mounting seats provided on the exterior case of the blower 138.

[0104] In another embodiment, the left and right headrest pillars 103 and the connecting member 104 may be formed by bending a single hollow pipe. In this case, it is preferable that an insertion hole for passing the wire harness 120 is formed in the upper end portion of the left and right headrest pillars 103 or the connecting member 104.

[0105] 9 and 10 , resin grommets 143 for protecting the edges may be attached to the upper and lower ends of the left and right headrest pillars 103. The grommets 143 are provided with locking claws to prevent disengagement and locking projections to prevent rotation, and are fixed by fitting into through holes and recesses, respectively, provided at the ends of the headrest pillars 103. The through holes and recesses are preferably provided on the same surface of the headrest pillars 103, and may be provided on the surface opposite to or on the same surface as the locking grooves 110.

[0106] The sum of the diameters of the first wiring 122A and the second wiring 122B may be smaller than the widths of the second connector 123A and the third connector 123B, respectively. The sum of the diameters of the third wiring 122C and the fourth wiring 122D may be smaller than the widths of the fourth connector 123C and the fifth connector 123D, respectively.

[0107] The third wire harness 53 may be mounted at a position that avoids other electrical devices such as a vibration device and a sensor when viewed from the front. The third wire harness 53 may also be mounted at a position that avoids other electrical devices such as a vibration device and a sensor when viewed from above. In the seat cushion 11, the first wire harness 51 and the second wire harness 52 may also be mounted at a position that avoids the contact surface between the seat cushion pressure receiving portion 14A and the pad 106. The wire harness 120 may extend through a hanging groove formed in the pad 106. Portions of the first wire harness 51 and the second wire harness 52 may be fixed to the seat cushion frame 13A. If the seat cushion frame 13A is provided with the seat cushion pressure receiving portion 14A, portions of the first wire harness 51 and the second wire harness 52 may be fixed to the seat cushion pressure receiving portion 14A. If the seat cushion pressure receiving portion 14A is formed of a wire spring, the first wire harness 51 and the second wire harness 52 may also be fixed to the wire spring. When the seat cushion pressure receiving portion 14A is configured by a wire spring and a resin plate supported by the wire spring, the first wire harness 51 and the second wire harness 52 may be fixed to the plate.

[0108] A back plate, which is a resin plate member, may be provided on the back surface of the seat back 12. The back plate may be joined to the seat back frame 13B or sewn to the cover material 107.

[0109] The vehicle in which the seat 100 is installed may be an automobile such as an internal combustion engine vehicle, an electric vehicle (EV), or a fuel cell vehicle (FCEV), an airplane, a ship, a spacecraft, a drone, etc. The electrical device 105 installed in the headrest 101 may be a sensor, a display, a light, a vibration device, an odor generating device, etc. instead of the speaker 105A and the microphone 105B.

[0110] The seat 100 may have a height adjustment mechanism that adjusts the height of the seat cushion 11 relative to the floor 2.

[0111] The second to fifth connectors 123A to 123D may be fixed to the seatback pressure receiving portion 14B supported by the seatback frame 13B. If the seatback pressure receiving portion 14B is configured with a wire spring, the second to fifth connectors 123A to 123D may be fixed to the wire spring. If the seatback pressure receiving portion 14B is configured with a wire spring and a resin plate supported by the wire spring, the second to fifth connectors 123A to 123D may be fixed to the plate. In this case, the second to fifth connectors 123A to 123D may be fixed to the rear surface of the plate.

[0112] The above embodiments may be expressed as follows: One embodiment is a vehicle seat 100 including a seat back 12, a headrest 101 provided on an upper portion of the seat back 12, and a wire harness 120 extending from an interior of the headrest 101 to an interior of the seat back 12, the headrest 101 including a pair of headrest pillars 103 formed of hollow pipe material and extending to the seat back 12, the wire harness 120 including a first connector 121, a first wiring 122A and a second wiring 122B extending from the first connector 121, a second connector 123A connected to the first wiring 122A, and a third connector 123B connected to the second wiring 122B, the first wiring 122A being longer than the second wiring 122B, and the first wiring 122A and the second wiring 122B passing through an interior of one of the pair of headrest pillars 103.

[0113] According to this aspect, the second connector 123A and the third connector 123B are disposed offset from each other in the longitudinal direction of the wire harness 120. Therefore, the maximum width of the wire harness 120 is smaller than when the second connector 123A and the third connector 123B are integrally formed. As a result, the second connector 123A and the third connector 123B can pass through the headrest pillar 103, and the wire harness 120 can pass through the headrest pillar 103.

[0114] In the above aspect, the first wiring 122A and the second wiring 122B may be covered with an exterior member, and the exterior member may have a hole that exposes the second connector 123A to the outside.

[0115] According to this aspect, the first wiring 122A and the second wiring 122B can be protected by the exterior member while the second connector 123A and the third connector 123B are exposed to the outside.

[0116] In the above embodiment, the first wiring 122A has a protective member at a portion corresponding to the third connector 123B.

[0117] According to this aspect, the portion of the first wiring 122A that contacts the third connector 123B can be protected by the protective member.

[0118] In the above aspect, the combined width of the third connector 123B and the first wiring 122A provided with the protective member may be smaller than the inner diameter of the headrest pillar 103.

[0119] According to this aspect, the third connector 123B and the first wiring 122A provided with the protective member can pass through the inside of the headrest pillar 103 as a single unit.

[0120] In the above aspect, the first wiring 122A and the second wiring 122B may be covered with an exterior member, and the second connector 123A and the third connector 123B may protrude outward from the end of the exterior member.

[0121] According to this aspect, the first wiring 122A and the second wiring 122B can be protected by the exterior member while the second connector 123A and the third connector 123B are exposed to the outside.

[0122] In the above aspect, the wire harness 120 has a first connector 121, a third wiring 122C and a fourth wiring 122D extending from the first connector 121, a fourth connector 123C connected to the third wiring 122C, and a fifth connector 123D connected to the fourth wiring 122D, the third wiring 122C being formed longer than the fourth wiring 122D, and the third wiring 122C and the fourth wiring 122D passing through the other of the pair of headrest pillars 103.

[0123] According to this aspect, the wire harness 120 extending from the first connector 121 branches into a set of the first wiring 122A and the second wiring 122B and a set of the third wiring 122C and the fourth wiring 122D, thereby reducing the width of the wire harness 120.

[0124] In the above aspect, the number of pins of the first connector 121 may be equal to the total number of pins of the second to fifth connectors 123A to 123D.

[0125] According to this aspect, the width of the second to fifth connectors 123A to 123D is small, so that they can pass through the inside of the headrest pillar 103.

[0126] In the above aspect, the second connector 123A and the fourth connector 123C may have the same structure, and the third connector 123B and the fifth connector 123D may have the same structure.

[0127] In the above aspect, an electrical device 105 is connected to the first connector 121, and pads 106 are placed over the upper ends of the pair of headrest pillars 103 and the electrical device 105, and a cover material 107 is placed over the pads 106.

[0128] According to this aspect, the headrest 101 is configured with the built-in electrical device 105 .

[0129] In the above aspect, it is preferable that a seat cushion 11 is provided below the seat back 12 , and the wire harness 120 passes through the inside of the seat back 12 and extends below the seat cushion 11 .

[0130] DESCRIPTION OF SYMBOLS 1: Seat 11: Seat cushion 12: Seat back 13: Seat frame 13A: Seat cushion frame 13B: Seat back frame 14: Pressure receiving portion 14A: Seat cushion pressure receiving portion 14B: Seat back pressure receiving portion 32: Electric actuator 35: Metal wire 36: Plate 45: Control device 46: Seating sensor 51: First wire harness 52: Second wire harness 53: Third wire harness 55: Clip 61: First connector 62: Second connector 63: Third connector 67: Fourth connector 71: Engagement hole 72: Band engagement hole 73: Main body portion 74: Band portion 75: Engagement portion 77: Shaft portion 78: Flange portion 79: Elastic claw 81: Fracture starting point portion 82: Tab 85: Slot

Claims

1. A vehicle seat comprising: a seat frame; a flexible pressure-receiving portion supported on the inside of the seat frame to support an occupant; a first wire harness attached to the seat frame and having a first connector at an end; and a second wire harness attached to the pressure-receiving portion and having a second connector at an end connectable to the first connector.

2. The vehicle seat according to claim 1, wherein said first connector is attached to said seat frame.

3. The vehicle seat according to claim 1, wherein the second connector is attached to the pressure receiving portion.

4. A vehicle seat as described in claim 1, wherein the seat frame includes a seat cushion frame constituting a seat cushion and a seat back frame constituting a seat back, the pressure receiving portion includes a seat cushion pressure receiving portion supported on the inside of the seat cushion frame and a seat back pressure receiving portion supported on the inside of the seat back frame, the first wire harness is attached to the seat cushion frame, and the second wire harness is attached to the seat cushion pressure receiving portion.

5. The vehicle seat according to claim 4, wherein the second wire harness has a third connector, and a third wire harness having a fourth connector connectable to the third connector is attached to the seat back pressure receiving portion.

6. The vehicle seat according to claim 5, wherein the third connector is attached to the seat cushion pressure receiving portion.

7. The vehicle seat according to claim 5, wherein the fourth connector is attached to the seat back pressure receiving portion.

8. The vehicle seat according to claim 4, wherein the seat cushion pressure receiving portion comprises a flexible metal wire suspended across the seat cushion frame and a flexible resin plate supported by the metal wire, the first wire harness is connected to a control device provided in the seat frame, and the second wire harness is connected to a seating sensor provided on the plate.

9. The vehicle seat described in claim 1, wherein the first wire harness is connected to the seat frame by a clip, the clip having a main body portion in which a band fastening hole is formed, a band portion extending from the main body portion and capable of inserting into the band fastening hole, and an engagement portion protruding from the main body portion and engaging with an engagement hole which is a through hole formed in the seat frame, the first wire harness is supported by the band portion, and the band portion has a breakage starting point portion which is a breakage starting point, and a tab protruding from the breakage starting point portion.

10. The vehicle seat of claim 1, wherein the first wire harness is connected to the seat frame by a clip, the clip having a main body portion in which a band engagement hole is formed, a band portion extending from the main body portion and capable of inserting into the band engagement hole, and an engagement portion protruding from the main body portion and engaging with an engagement hole which is a through hole formed in the seat frame, the first wire harness is supported by the band portion, and the engagement portion has a shaft portion extending from the main body portion and inserting into the engagement hole, a flange portion provided on the shaft portion and abutting the seat frame, and an elastic claw extending from the shaft portion towards the main body portion and engaging with the edge of the engagement hole, a slot is formed in the flange portion extending in the direction in which the shaft portion extends, and the tip of the elastic claw passes through the slot and protrudes towards the main body portion further than the flange portion.

11. The vehicle seat of claim 1, wherein the first wire harness is connected to the seat frame by a clip, the clip having a main body portion having a band engagement hole formed therein, a band portion extending from the main body portion and capable of inserting into the band engagement hole, and an engagement portion protruding from the main body portion and engaging with an engagement hole which is a through hole formed in the seat frame, the first wire harness is supported by the band portion, and the engagement portion has a shaft portion extending from the main body portion and inserting into the engagement hole, a flange portion provided on the shaft portion and abutting against the seat frame, and an elastic claw extending from the shaft portion toward the main body portion and engaging with the edge of the engagement hole, and the shaft portion is provided with a fragile portion which breaks due to a torsional load applied to the shaft portion.

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