Vehicle seat

Abstract

Provided is a vehicle seat that can improve the covering power for a temperature control member.　A seat cushion (1) of a vehicle seat comprises a cushion frame (10), a pad material (11) disposed on the cushion frame (10), a temperature adjustment member (14) for adjusting the temperature of the seating surface of the seat cushion (1), and a temperature control member (15) for controlling the temperature of the temperature adjustment member (14). The cushion frame (10) has a first side frame and a second side frame (10b) that are disposed apart from each other in the seat width direction, and a rear frame (10c) that connects the rear portion of the first side frame and the rear portion of the second side frame (10b). The temperature control member (15) is disposed between the rear frame (10c) and the pad material (11) in the front-rear direction. At least a part of the temperature control member (15) is disposed, in the vertical direction, at a position overlapping the rear frame (10c) in the front-rear direction.

Description

Vehicle seats

[0001] The present invention relates to a vehicle seat, and more particularly to a vehicle seat provided with a seat cushion.

[0002] Conventionally, a seat cushion having a seat heater and a temperature control member (specifically, a thermostat) for controlling the seat heater has been known for a vehicle seat such as a car. For example, Patent Document 1 discloses a vehicle seat in which the seat heater is disposed on the upper surface of a pad material and the thermostat is disposed in a front portion of the pad material. A recess is formed in the front portion of the pad material, and the thermostat is disposed in the recess.

[0003] Furthermore, for example, Patent Document 2 discloses a vehicle seat in which a seat heater is disposed on the upper surface of a padding material and a thermostat is disposed in a rear portion of the padding material. The seat heater and thermostat are attached to a cover material. The thermostat is covered from the rear by a cover member sewn to the cover material.

[0004] JP 2011-079365 A JP 2018-176847 A

[0005] In Patent Document 1, the thermostat is placed in a recess to reduce surface irregularities and improve appearance. However, if the thermostat is placed in the front part of the padding as in Patent Document 1, there is a risk that the occupant's lower legs will come into contact with the thermostat, subjecting the thermostat to external force. Patent Document 1 also describes that the thermostat may be placed on the seat surface, bottom, or side of the seat back. However, in any of these locations, there is a risk that the thermostat will be subjected to the weight or external force of the occupant.

[0006] In addition, in Patent Document 2, the thermostat is located at the rear of the padding and is covered from behind with a covering member, thereby minimizing the influence of the external environment around the seat. However, in Patent Document 2, because the covering member is made of foamed resin, synthetic fiber, resin film, etc., there is a risk that the thermostat may be subjected to external forces from behind. In particular, there is a risk that the thermostat may be subjected to kicking forces from passengers sitting in the rear seats or collision forces from items stored in the luggage compartment.

[0007] The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a vehicle seat that can improve the covering force for a temperature control member.

[0008] The problem is solved by a vehicle seat having a seat cushion, the seat cushion having a cushion frame, a padding material disposed on the cushion frame, a temperature adjustment member disposed on the padding material and adjusting the temperature of the seating surface of the seat cushion, and a temperature control member connected to the temperature adjustment member and controlling the temperature of the temperature adjustment member, the cushion frame having first and second side frames disposed apart in the seat width direction, and a rear frame connecting rear portions of the first side frames and second side frames, the temperature control member being disposed between the rear frame and the padding material in the fore-and-aft direction, and at least a portion of the temperature control member being disposed in a position overlapping the rear frame in the up-and-down direction in the fore-and-aft direction.

[0009] With the above-described configuration, the temperature control member is positioned between the padding and the rear frame and is covered from behind by the rear frame, thereby providing adequate protection against external forces. In particular, the temperature control member can be prevented from being subjected to kicking forces from rear seat occupants or impact forces from items stored in the luggage compartment. This improves the covering power for the temperature control member.

[0010] In this case, the upper end of the temperature control member may be positioned below the upper end of the rear frame and above the lower end of the rear frame. With this configuration, it is possible to further suppress the transmission of external forces and loads from behind and above to the temperature control member.

[0011] In this case, a storage recess for storing the temperature control member may be formed in the rear end of the padding, the temperature control member may be disposed at an angle within the storage recess, and the lower end of the temperature control member may be disposed forward of the upper end of the temperature control member. With the above configuration, the temperature control member is disposed in the storage recess, which further reduces the application of loads and external forces to the temperature control member. Furthermore, the temperature control member is disposed at an angle, which further reduces the transmission of force to the temperature control member, particularly when kicked up by a rear seat occupant.

[0012] In this case, the seat cushion may have a skin covering the pad, a portion of the skin being positioned rearward of the rear frame, and the temperature control member may be fixed to the pad. With this configuration, the temperature control member is fixed to the pad rather than the skin, so that even if the skin is pulled and moved by a load or external force, the temperature control member does not move with the skin, and the relative position of the temperature control member and the rear frame does not change. This further improves the covering ability of the rear frame for the temperature control member.

[0013] In this case, the seat cushion may have a skin covering the padding, a hanging groove for hanging the skin into the padding formed on the upper surface of the padding, and the upper end of the temperature control member may be positioned so as to overlap the hanging groove in the front-rear direction in the up-down direction. With this configuration, the temperature control member is positioned at a different position from the hanging groove in the front-rear direction, thereby making it possible to make the padding more compact in the thickness direction.

[0014] In this case, the seat cushion may have a skin covering the padding, a hanging groove for hanging the skin onto the padding formed on the upper surface of the padding, and the temperature control member may be disposed below an imaginary line connecting the upper end of the rear frame and the lower end of the hanging groove. With the above configuration, it is possible to suppress the transmission of external forces and loads, particularly from above, to the temperature control member.

[0015] In this case, the cushion frame may have a front frame connecting the front portions of the first side frame and the second side frame, and the temperature control member may be disposed below an imaginary line connecting the upper ends of the rear frame and the front frame. With this configuration, it is possible to prevent external forces and loads, especially from above, from being transmitted to the temperature control member.

[0016] In this case, the seatback may include a seat cushion frame and a reclining device that rotatably connects the seatback to the seat cushion, the seatback having a back frame connected to the cushion frame via the reclining device, the reclining device switching the seatback between a normal state in which an occupant can be seated and a reclined state in which the seatback is rotated rearward from the normal state, and when the seatback is in the normal state, the temperature control member may be positioned forward of the front end of the seatback. With the above configuration, it is possible to further suppress the transmission of external forces, particularly from behind, to the temperature control member.

[0017] In this case, the cushion frame may have a front frame connecting a front portion of the first side frame and a front portion of the second side frame, the seat cushion may span the rear frame and the front frame and have a pressure-receiving member for supporting the padding, a rear portion of the pressure-receiving member may be disposed between the padding and the rear frame in the front-rear direction, and at least a portion of the temperature control member may be disposed in a position overlapping in the front-rear direction with the rear frame and the rear portion of the pressure-receiving member in the up-down direction. With the above configuration, the temperature control member is further covered with the pressure-receiving member, thereby further suppressing the application of loads and external forces to the temperature control member.

[0018] In this case, the seat cushion may have a skin covering the padding and a cover member attached to the skin covering the temperature control member, with a portion of the skin positioned rearward of the rear frame, and the cover member positioned between the padding and the rear frame in the front-to-rear direction and extending from the rear end of the padding to its underside to cover the temperature control member from behind and below. With the above configuration, the temperature control member is further covered by the cover member, thereby further reducing the application of loads and external forces to the temperature control member. Furthermore, because the cover member extends to the underside of the padding, it is possible to further reduce the transmission of force to the temperature control member, particularly when a rear seat occupant kicks up from below.

[0019] According to the present invention, the covering force for the temperature control member can be improved. Furthermore, according to the present invention, the transmission of external forces and loads from behind and above to the temperature control member can be further suppressed. Furthermore, according to the present invention, the application of loads and external forces to the temperature control member can be further suppressed. Furthermore, according to the present invention, the transmission of force to the temperature control member when a seat occupant in the rear seat kicks up from below can be further suppressed. Furthermore, according to the present invention, the covering force of the rear frame for the temperature control member can be further improved. Furthermore, according to the present invention, the padding can be made more compact in the thickness direction. Furthermore, according to the present invention, the transmission of external forces and loads from above to the temperature control member can be suppressed. Furthermore, according to the present invention, the transmission of external forces from behind to the temperature control member can be further suppressed. Furthermore, according to the present invention, the application of loads and external forces to the temperature control member can be further suppressed. Furthermore, according to the present invention, the transmission of force to the temperature control member when a seat occupant in the rear seat kicks up from below can be further suppressed.

[0020] FIG. 1 is a perspective view of a vehicle seat according to a first embodiment. FIG. 2 is a cross-sectional view taken along line A-A in FIG. 1. FIG. 3 is a perspective view of a seat cushion with a padding removed. FIG. 4 is a side view of a vehicle seat. FIG. 5 is a cross-sectional view of a vehicle seat according to a second embodiment. FIG. 6 is a schematic view of the exterior of a motorcycle equipped with a motorcycle seat according to an embodiment of the present invention. FIG. 7 is an exterior view of a motorcycle seat. FIG. 8 is a cross-sectional view of a seat covering material. FIG. 9 is a cross-sectional view of a seat covering material before welding is performed. FIG. 10 is a cross-sectional view of a conventional seat covering material. FIG. 11 is a diagram illustrating a manufacturing process for a seat covering material.

[0021] Hereinafter, an embodiment of the present invention will be described with reference to Figures 1 to 11. In the following description, the "front-rear direction" refers to the front-rear direction of the vehicle seat, which is the direction that coincides with the direction of travel of the vehicle when it is traveling. The "seat width direction" refers to the width direction of the vehicle seat, which is the direction that coincides with the left-right direction as seen by an occupant seated in the vehicle seat. The "up-down direction" refers to the up-down direction of the vehicle, which is the direction that coincides with the vertical direction when the vehicle is traveling on a horizontal plane.

[0022] First Embodiment A vehicle seat S according to a first embodiment will be described with reference to FIGS. 1 to 4. As shown in FIG. 1, the vehicle seat S is placed on a vehicle floor and is a seat in which a vehicle occupant sits. In this embodiment, the vehicle seat S is used as a front seat corresponding to the front seats of a vehicle. However, the vehicle seat S is not limited to this, and may also be a rear seat of a vehicle, or may be used as a middle seat in the second row or a rear seat in the third row in a vehicle with three rows of seats in the longitudinal direction.

[0023] As shown in Fig. 1, the vehicle seat S includes a seat cushion 1, a seat back 2, a headrest 3 connected to an upper portion of the seat back 2, and a reclining device 4 that rotatably connects the seat back 2 to the seat cushion 1. As shown in Fig. 2, the vehicle seat S also includes a rail device 5 that supports the seat body relative to the vehicle floor so that the seat body can move in the front-rear direction, and a height link device 6 that connects the seat body to the rail device 5 so that the seat body can be raised and lowered. The vehicle seat S may also include movable devices such as side support devices that protrude the sides of the seat body toward the seat occupant, a vibration device, a blower device, etc.

[0024] As shown in Figures 3 and 4, the seat cushion 1 is a seating portion that supports the occupant from below, and is provided with a cushion frame 10 serving as a skeleton inside. As shown in Figure 4, the seat back 2 is a backrest portion that supports the occupant's back from behind, and is provided with a back frame 20 serving as a skeleton inside. As shown in Figure 4, the headrest 3 is a head portion that supports the occupant's head from behind, and is provided with a headrest pillar 30 serving as a skeleton inside.

[0025] 2 and 3 , the seat cushion 1 includes a cushion frame 10 formed of a substantially rectangular frame body, a padding material 11 arranged on the cushion frame 10, a skin material 12 covering the padding material 11, a pressure-receiving member 13 for supporting the padding material 11, a temperature adjustment member 14 for adjusting the temperature of the seating surface of the seat cushion 1, and a temperature control member 15 for controlling the temperature of the temperature adjustment member 14. The temperature adjustment member 14 is connected to a power source and a control device via a harness.

[0026] As shown in Figure 3, the cushion frame 10 has a first side frame 10a and a second side frame 10b arranged at a distance in the seat width direction, a rear frame 10c connecting the rear portion of the first side frame 10a and the rear portion of the second side frame 10b, a front frame 10d connecting the front portion of the first side frame 10a and the front portion of the second side frame 10b, and a plate-shaped pan frame 10e spanning the front portion of the first side frame 10a and the front portion of the second side frame 10b.

[0027] As shown in Fig. 3, the first side frame 10a and the second side frame 10b are plate-shaped frames that are long in the front-rear direction of the seat. The upper and lower ends of the first side frame 10a and the second side frame 10b each have a flange that bends and protrudes inward in the seat width direction. As shown in Fig. 4, a reclining device 4 is attached to the rear portions of the first side frame 10a and the second side frame 10b via a connecting bracket 10f. Furthermore, as shown in Fig. 2, a rail device 5 is attached to the lower portions of the first side frame 10a and the second side frame 10b via a height link device 6.

[0028] As shown in Figure 3, the rear frame 10c is a pipe-shaped frame that extends long in the seat width direction and has a circular cross section. A pressure-receiving member 13 is hooked to the center of the rear frame 10c in the seat width direction. Link members 6a of the height link device 6 are attached to both end portions of the rear frame 10c in the seat width direction. The front frame 10d is a pipe-shaped frame that extends long in the seat width direction and has a circular cross section. A pressure-receiving member 13 is hooked to the center of the front frame 10d in the seat width direction.

[0029] As shown in Fig. 3, the pan frame 10e is a plate-shaped erection frame that supports the thighs of the occupant. The side portions of the pan frame 10e in the seat width direction are placed on the upper flanges of the first side frame 10a and the second side frame 10b.

[0030] The padding 11 is a cushioning member made of urethane foam or the like. As shown in FIG. 2 , a storage recess 11b for storing a temperature control member 15 is formed in the rear end 11a of the padding 11. The storage recess 11b is a recess formed so as to recess forward from the rear end surface of the padding 11. The storage recess 11b is provided in the center of the padding 11 in the thickness direction (i.e., the vertical direction) and the center of the seat width direction, and is formed at a position overlapping with the rear frame 10c in a front view. In other words, the storage recess 11b and the rear frame 10c are positioned at the same height. The bottom surface of the storage recess 11b is formed in the rear end 11a of the padding 11 so as to be inclined with respect to the vertical direction. In other words, when the temperature control member 15 is attached to the storage recess 11b, the temperature control member 15 is positioned at an inclination with respect to the vertical direction.

[0031] The upper surface of the padding 11 is formed with a plurality of hanging grooves for hanging the cover material 12 into the padding 11. More specifically, the padding 11 has a rear hanging groove 11c disposed near the accommodation recess 11b and a front hanging groove 11d disposed forward of the rear hanging groove 11c. The cover material 12 and the temperature adjusting member 14 are disposed in each hanging groove.

[0032] As shown in Fig. 2, the cover material 12 is made of a stretchable nylon material or the like and is formed into a shape that can cover the padding 11. More specifically, the cover material 12 covers the front end 11e of the padding 11 from the front and the upper surface of the padding 11 from above. Furthermore, as shown in Fig. 4, the cover material 12 covers the side surfaces of the padding 11 from the sides. As shown in Fig. 2, the cover material 12 extends in the vertical direction to cover the rear frame 10c from the rear and covers the lower surface of the padding 11 from below. In other words, a portion of the cover material 12 (specifically, the rear portion of the cover material 12) is positioned rearward of the rear frame 10c and extends from the rear frame 10c to the bottom surface of the pressure-receiving member 13.

[0033] An engaging member (e.g., a clip, not shown) for attaching the cover material 12 to the padding 11 is sewn to the front end of the cover material 12. The cover material 12 is attached to the padding 11 by engaging the engaging member with an engaged member, not shown, provided at the front end 11e of the padding 11. The engaging member provided at the rear end of the cover material 12 is attached to the bottom surface of the pressure-receiving member 13. The rear end of the cover material 12 may be attached to the rear end 11a of the padding 11. The cover material 12 is formed by connecting multiple fabric materials by sewing them inside the hanging groove. A fastening member (e.g., a clip, not shown) for hanging the cover material 12 into the hanging groove is sewn to the sewn end of the cover material 12, and is attached to an engaged member, not shown, provided inside the hanging groove. The method of attaching the cover material 12 to the padding 11 is not limited to a clip or other member and can be selected as appropriate.

[0034] As shown in FIG. 3 , the pressure-receiving member 13 is a plate-shaped elastic support member that supports the buttocks of a seated occupant. The pressure-receiving member 13 spans the rear frame 10c and the front frame 10d and bends vertically in response to (i.e., following) the movement of the seated occupant. The pressure-receiving member 13 has a rear hook portion 13a hooked to the rear frame 10c, a plate-shaped rear portion 13b on which the rear hook portion 13a is provided, a central portion 13c extending forward from the rear portion 13b along the underside of the padding material 11, a front portion 13d extending forward from the central portion 13c and sloping upward, and a front hook portion 13e provided on the front portion 13d and hooked to the front frame 10d. The rear portion 13b slopes downward as it extends forward and extends along the rear end surface of the rear end portion 11a of the padding material 11. As shown in FIG. 2, the rear portion 13b is disposed between the temperature adjustment member 14 and the rear frame 10c in the front-rear direction.

[0035] The temperature adjustment member 14 is a seat heater that adjusts the temperature of the seating surface of the seat cushion 1. The temperature adjustment member 14 is a planar heating element that heats the seat body and is attached inside the seat cushion 1 as shown in FIG. 1. More specifically, as shown in FIG. 2, the temperature adjustment member 14 is disposed on the upper surface of the pad material 11 and the rear end surface of the rear end portion 11a, and is attached between the pad material 11 and the upholstery material 12. The temperature adjustment member 14 is provided with a temperature measurement sensor (not shown). The temperature measurement sensor is a thermistor that measures the temperature of the temperature adjustment member 14 and outputs an output signal based on the measurement result of the heater temperature to a control device. The control device corresponds to an ECU (Electronic Control Unit) and receives the output signal detected by the temperature measurement sensor, compares the heater temperature with a set value, and controls the supply of electricity from a power source to each heater wire.

[0036] The temperature control member 15 is a thermostat connected to the temperature adjustment member 14 and controls the temperature of the temperature adjustment member 14. The temperature control member 15 maintains the heater temperature at or below a certain level by cutting off the supply of electricity to the temperature adjustment member 14 (specifically, a heater wire) when the heater temperature exceeds a predetermined value. While the present embodiment describes a case in which the temperature adjustment member 14 is a heater for heating the seating surface, the temperature adjustment member 14 may also be configured to include a heating element (e.g., a heater) for heating the seating surface and a cooling element (e.g., a Peltier element) for cooling the seating surface. In this case, the temperature adjustment member 14 switches the heating element and cooling element ON / OFF depending on the temperature detected by the thermistor and a preset target temperature, thereby operating to bring the temperature of the seating surface of the seat cushion 1 closer to a preset target value.

[0037] As shown in FIG. 2 , the temperature control member 15 is attached to the inner surface of the rear end portion of the temperature adjustment member 14 and is disposed at the rear end 11a of the padding 11. Specifically, the temperature control member 15 is disposed at an incline relative to the vertical direction inside the accommodation recess 11b. More specifically, the lower end 15a of the temperature control member 15 is disposed forward of the upper end 15b of the temperature control member 15. In this way, since the temperature control member 15 is disposed inside the accommodation recess 11b, it is possible to further suppress the application of loads and external forces to the temperature control member 15. Furthermore, since the temperature control member 15 is disposed at an incline, it is possible to further suppress the transmission of force to the temperature control member 15, particularly when a rear seat occupant kicks up from below.

[0038] 3 , the seat back 2 has a back frame 20 formed of a substantially rectangular frame-like body, a back pad material 21 arranged on the back frame 20, and a back covering material 22 covering the back pad material 21. The back frame 20 is connected to the cushion frame 10 via the reclining device 4.

[0039] <<Reclining Device>> The reclining device 4 is a device that rotatably connects the back frame 20 to the cushion frame 10 and is capable of locking the back frame 20. As shown in Fig. 4 , the reclining device 4 switches the seat back 2 between a normal state in which an occupant can be seated and a reclined state in which the seat back 2 is rotated rearward from the normal state. The reclining device 4 can switch the state of the back frame 20 between a locked state in which the back frame 20 is fixed to the cushion frame 10 and an unlocked state in which the back frame 20 is rotatable relative to the cushion frame 10.

[0040] <<Rail Device>> The rail device 5 is disposed between the seat body and the vehicle floor in the vertical direction and is fixed to the vehicle floor. As shown in Fig. 2, the rail device 5 has left and right lower rails 5a extending in the front-rear direction of the seat and left and right upper rails 5b supported slidably along the lower rails 5a. A cushion frame 10 is mounted on the upper surfaces of the left and right upper rails 5b via height link devices 6.

[0041] <<Height Link Device>> As shown in Figure 2, the height link device 6 is attached between the rail device 5 and the cushion frame 10 and has left and right link members 6a located on the front side of the seat. When a height control lever (not shown) is operated, the link members 6a rotate, causing the seat body to rise and fall, thereby adjusting the seat height. The height link device 6 may be manually operated using the height control lever, or may be automatically operated by being driven by a motor.

[0042] <<Regarding the Position of the Temperature Control Member>> Here, the positional relationship between the temperature control member 15 and other members of the vehicle seat S will be described. The temperature control member 15 is disposed in a storage recess 11b formed in the rear end 11a of the padding 11. As shown in FIG. 2 , the temperature control member 15 is disposed between the rear frame 10c and the padding 11 in the front-rear direction. At least a portion of the temperature control member 15 is disposed in a position that overlaps the rear frame 10c in the front-rear direction. In other words, the temperature control member 15 and the rear frame 10c are disposed so as to overlap in a front-rear view and are at the same height. In this way, the temperature control member 15 is disposed between the padding 11 and the rear frame 10c and is covered from the rear by the rear frame 10c. This allows the temperature control member 15 to be appropriately protected from external forces. In particular, this prevents the temperature control member 15 from being subjected to kicking forces from a passenger in the rear seat or collision forces from items stored in the luggage compartment.

[0043] 2, the upper end 15b of the temperature control member 15 is positioned below the upper end of the rear frame 10c and above the lower end of the rear frame 10c. In particular, the temperature control member 15 is positioned inside the accommodation recess 11b so as to be inclined relative to the up-down direction. Therefore, at least the upper end 15b of the temperature control member 15 is covered by the rear frame 10c, which prevents external forces and loads from behind and above from being transmitted to the temperature control member 15.

[0044] 2 , at least a portion of the temperature control member 15 is positioned so as to overlap the rear frame 10c and the pressure-receiving member 13 in the front-rear direction. Specifically, the upper end 15b of the temperature control member 15 is positioned so as to overlap the rear frame 10c and the rear portion 13b of the pressure-receiving member 13 in the front-rear direction. In other words, the upper end 15b of the temperature control member 15, the rear frame 10c, and the rear portion 13b of the pressure-receiving member 13 are positioned so as to overlap in a front-rear direction when viewed from the front, and are at the same height. In other words, the upper end 15b of the temperature control member 15 is covered from the rear by the temperature adjustment member 14, the rear portion 13b of the pressure-receiving member 13, the rear frame 10c, and the skin material 12, in that order. In this way, because the temperature control member 15 is covered not only by the rear frame 10c but also by the pressure-receiving member 13, the application of loads and external forces to the temperature control member 15 can be further suppressed. Furthermore, since the rear frame 10c and the pressure-receiving member 13 are covered with the skin material 12, the protection and design of the rear frame 10c can be improved.

[0045] As shown in FIG. 2 , the upper end 15b of the temperature control member 15 is positioned so as to overlap the hanging groove in the front-rear direction. Specifically, the upper end 15b of the temperature control member 15 is positioned above an imaginary line L1 extending rearward, perpendicular to the up-down direction, from the bottom surface of the rear hanging groove 11c, which is the rearmost of the multiple hanging grooves. In other words, the upper end 15b of the temperature control member 15 and the bottom surface of the rear hanging groove 11c are positioned so as to overlap in a front-rear view. In this way, since the temperature control member 15 is positioned at a different position from the hanging groove in the front-rear direction, the padding 11 can be made more compact in the thickness direction. In particular, since the rear hanging groove 11c, which is positioned near the temperature control member 15 among the multiple hanging grooves, is positioned so as to overlap the temperature control member 15, the thickness of the rear end 11a of the padding 11 can be made more compact.

[0046] 2, the temperature control member 15 is positioned below an imaginary line L2 connecting the upper end of the rear frame 10c and the lower end of the rear hanging groove 11c. The temperature control member 15 is also positioned below an imaginary line L3 connecting the upper end of the rear frame 10c and the upper end of the front frame 10d. In this way, the temperature control member 15 is positioned away from the upper surface of the padding material 11, which makes it possible to prevent external forces and loads, especially those from above, from being transmitted to the temperature control member 15.

[0047] 2, the lower end 15a of the temperature control member 15 is positioned below the upper end of the front frame 10d and above the lower end of the front frame 10d. In this way, the temperature control member 15 is positioned away from the lower surface of the padding material 11, which makes it possible to suppress the transmission of external forces, particularly from below, to the temperature control member 15.

[0048] 2, the temperature control member 15 is disposed below the upper end of the front frame 10d and above the lower end of the front frame 10d. In this way, the temperature control member 15 is disposed at a position away from the lower surface of the padding material 11, which makes it possible to suppress the transmission of external forces, particularly from below, to the temperature control member 15.

[0049] 2, the temperature control member 15 is covered from below by the skin material 12 and the pressure-receiving member 13. Specifically, the temperature control member 15 is arranged so as to overlap vertically with the rear end of the skin material 12 and the central portion 13c of the pressure-receiving member 13 in a side view. In this way, because the temperature control member 15 is covered from below by the skin material 12 and the pressure-receiving member 13, it is possible to suppress the transmission of external forces, particularly from below, to the temperature control member 15.

[0050] 2, the temperature control member 15 is disposed at the rear end 11a of the padding 11, and is positioned so as to overlap the pan frame 10e in the longitudinal direction. Therefore, since the temperature control member 15 is disposed at a position separated from the pan frame 10e at the same height as the pan frame 10e, the weight of the occupant can be effectively prevented from being transmitted to the temperature control member 15.

[0051] The temperature adjustment member 14 is not fixed to the covering material 12 but to the padding material 11. More specifically, the temperature adjustment member 14 is attached to the upper surface of the padding material 11, with a portion attached inside the rear hanging groove 11c and the front hanging groove 11d. For example, if the temperature adjustment member 14 is fixed to the covering material 12 and the covering material 12 is pulled and moved by the weight of the seat occupant or an external force, the temperature control member 15 will move along with the covering material 12. This will cause the temperature control member 15 to move together with the temperature adjustment member 14, potentially making it impossible to position the temperature control member 15 in an appropriate position. However, in this embodiment, the temperature control member 14 is fixed to the padding material 11 rather than the skin material 12, so even if the skin material 12 is pulled and moved by a load or external force, the temperature control member 15 does not move following the skin material 12, and therefore the relative positions of the temperature control member 15, the rear frame 10c, the front frame 10d, and the pressure-receiving member 13 do not change. Therefore, the covering power of the rear frame 10c for the temperature control member 15 can be further improved.

[0052] 4, when the seat back 2 is in the normal state (i.e., when the seat back 2 is not tilted rearward), the temperature control member 15 is disposed forward of the front end 2a of the seat back 2. For example, when the seat back 2 is tilted rearward, the force of a kick from a passenger sitting in the rear seat or a collision force from items stored in the luggage compartment is less likely to be transmitted to the rear end of the seat cushion 1. However, when the seat back 2 is in the normal state, such external forces may be more likely to be transmitted to the rear end of the seat cushion 1. In this way, because the temperature control member 15 is disposed forward of the front end 2a of the seat back 2, external forces, particularly from behind, can be more effectively prevented from being transmitted to the temperature control member 15.

[0053] <<Manufacturing Method>> The manufacturing method of the vehicle seat S is as follows: Note that, in the manufacturing method of the vehicle seat S, explanation of manufacturing steps other than those described below will be omitted.

[0054] The manufacturing method of the vehicle seat S includes a preparation process for preparing each component of the seat cushion 1, an assembly process for assembling each component of the seat cushion 1, and an assembly process for assembling the seat cushion 1 and the seat back 2.

[0055] More specifically, in the preparation step, the worker first prepares the cushion frame 10, the padding material 11, the covering material 12, the pressure-receiving member 13, the temperature adjustment member 14, and the temperature control member 15. The worker then connects the first side frame 10a and the second side frame 10b with the rear frame 10c and the front frame 10d, and then bridges the pan frame 10e across the first side frame 10a and the second side frame 10b, thereby preparing the cushion frame 10.

[0056] Then, in the assembly process, the worker attaches the pressure-receiving member 13 to the cushion frame 10. Specifically, the worker hooks the rear hook portion 13a of the pressure-receiving member 13 to the rear frame 10c and the front hook portion 13e to the front frame 10d. The worker also fixes the temperature adjustment member 14 and the temperature control member 15 to the padding material 11. Specifically, the worker inserts the temperature adjustment member 14 into the hanging groove of the padding material 11 and places the temperature adjustment member 14 on the upper surface of the padding material 11. The worker then places the temperature control member 15 in the accommodation recess 11b.

[0057] The worker then places the padding 11, to which the temperature adjustment member 14 and the temperature control member 15 are attached, on the cushion frame 10 and the pressure-receiving member 13. At this time, the worker assembles the padding 11 to the cushion frame 10 and the pressure-receiving member 13 so that the temperature control member 15 is positioned between the rear frame 10c and the padding 11 in the front-to-rear direction. The worker also positions at least a portion of the temperature control member 15 (specifically, the upper end 15b of the temperature control member 15) so that it overlaps the rear frame 10c in the front-to-rear direction. The worker then covers the padding 11 and the rear frame 10c with the cover material 12. Specifically, the worker suspends the cover material 12 into the suspending groove of the padding 11, covering the front and upper surfaces of the padding 11 with the cover material 12. The worker then attaches the cover material 12 to the bottom surface of the pressure-receiving member 13 so that it covers the rear of the rear frame 10c. In this manner, the seat cushion 1 is manufactured.

[0058] In the assembly process, the worker connects the seat cushion 1 and the seat back 2 via the reclining device 4. Specifically, the worker assembles the back frame 20 of the seat back 2 to the cushion frame 10 of the seat cushion 1 via the reclining device 4. In this manner, the vehicle seat S is manufactured.

[0059] The above-described manufacturing method of the vehicle seat S can improve the covering power for the temperature control member 15 .

[0060] Second Embodiment A vehicle seat S2 according to a second embodiment of the present invention will be described below with reference to Fig. 5. Note that descriptions of configurations that overlap with those of the vehicle seat S described above will be omitted.

[0061] The vehicle seat S2 includes a seat cushion 41 that supports the buttocks of a seated occupant. The seat cushion 41 has a cover member 16 that covers a temperature control member 15 disposed on a pad material 11. Note that the cushion frame 10, pad material 11, skin material 12, pressure-receiving member 13, temperature adjustment member 14, and temperature control member 15 in the seat cushion 41 are configured in the same manner as those in the seat cushion 1, and therefore will not be described here.

[0062] As shown in FIG. 5 , the cover member 16 is a covering member that covers the temperature control member 15 and is a sheet made of, for example, nonwoven fabric, woven fabric, felt, or urethane composite resin. The cover member 16 is made of a highly insulating material and can suppress heat dissipation near the temperature control member 15. Furthermore, by covering the temperature control member 15 with the cover member 16, the temperature control member 15 is less susceptible to the effects of external air temperature and other factors, allowing for optimal control of the temperature adjustment member 14. The cover member 16 is attached to the skin 12. More specifically, the upper end of the cover member 16 is sewn to the rear portion of the skin 12. The lower end of the cover member 16 is attached to the underside of the padding 11 with clip members (not shown). The cover member 16 is disposed between the padding 11 and the rear frame 10c in the front-to-rear direction and extends from the rear end 11a of the padding 11 to the underside. In other words, the cover member 16 covers the temperature control member 15 from the rear and below.

[0063] As shown in FIG. 5 , the rear portion 13b of the pressure-receiving member 13 is disposed between the cover member 16 and the rear frame 10c in the front-rear direction. At least a portion of the temperature control member 15 is disposed in a position that overlaps the rear frame 10c, the pressure-receiving member 13, and the cover member 16 in the front-rear direction. In other words, the upper end portion 15b of the temperature control member 15 is covered from the rear by the temperature adjustment member 14, the cover member 16, the rear portion 13b of the pressure-receiving member 13, the rear frame 10c, and the skin material 12, in that order. In this way, because the temperature control member 15 is covered not only by the rear frame 10c but also by the cover member 16 and the pressure-receiving member 13, the application of loads and external forces to the temperature control member 15 can be further suppressed. Furthermore, because the rear frame 10c and the pressure-receiving member 13 are covered by the skin material 12, the protection and design of the rear frame 10c can be improved.

[0064] In the above embodiment, a vehicle seat for an automobile or the like has been described as a specific example, but the present invention is not limited to this and can be used for various seats such as two-wheeled vehicle seats, vehicle seats for trains and buses, vehicle seats for airplanes and ships, as well as office chairs for work, wheelchairs, and child seats in shopping carts.

[0065] In this embodiment, the vehicle seat according to the present invention has been mainly described. However, the above embodiment is merely an example for facilitating understanding of the present invention and is not intended to limit the present invention. The present invention may be modified or improved without departing from the spirit thereof, and of course, the present invention also includes equivalents thereof.

[0066] Third Embodiment A vehicle seat S3 according to a third embodiment of the present invention will be described below with reference to Figures 6 to 11. An object of the present invention is to provide a cover material and a vehicle seat covered with the cover material that can prevent separation of the welded portions between the backing material that covers the wadding and the seating surface cover material. Another object of the present invention is to provide a cover material and a vehicle seat covered with the cover material that can prevent wear on the surface of the wadding.

[0067] Hereinafter, a motorcycle seat 101 as a vehicle seat S3 according to an embodiment of the present invention (the present embodiment) and a seat covering material 110 for the motorcycle seat 101 will be described. The motorcycle seat 101 according to the present embodiment is a saddle-type seat that covers a storage space for storing a helmet from above and on which a seated occupant (driver, passenger) sits astride. The motorcycle seat 101 is detachably attached to the motorcycle V.

[0068] The embodiment described below is merely an example to facilitate understanding of the present invention, and is not intended to limit the present invention. In other words, the shapes, dimensions, arrangements, etc. of the components described below may be changed or improved without departing from the spirit of the present invention, and the present invention naturally includes equivalents thereof.

[0069] <<Main Configuration of Motorcycle Seat 101>> As shown in FIG. 6 , the motorcycle seat 101 according to this embodiment (hereinafter referred to as motorcycle seat 101) is mounted on a motorcycle V by being attached to a vehicle body B (motorcycle main body). The motorcycle seat 101 is a two-seater seat that has a front seating portion 102 for the rider at the front and a rear seating portion 103 for the passenger at the rear. The front seating portion 102 and the rear seating portion 103 are portions that support the buttocks and thighs of occupants of the motorcycle V (i.e., the rider and the passenger). A non-seating portion 104 where no rider sits is provided between the front seating portion 102 and the rear seating portion 103 of the motorcycle seat 101.

[0070] 7 is an external view of the motorcycle seat 101. The motorcycle seat 101 mainly comprises a bottom plate (not shown) that is a base substrate of the motorcycle seat 101, and a seat covering material 110 that covers the top of the bottom plate.

[0071] The bottom plate is formed as a rigid resin molded product using a resin material such as polypropylene or polyethylene as a raw material, but is not limited to this and may be formed from various materials.

[0072] As shown in Figure 8, the seat cover material 110 is a laminated sheet material having a wadding material 112 inside. The seat cover material 110 has a high-frequency welded portion 120 formed by welding. The seat cover material 110 will be described in detail below. The seat cover material 110 corresponds to the cover material of the present invention.

[0073] <<Seat Covering Material>> Next, the seat covering material 110 will be described with reference to Figures 8 and 9. Figure 8 is a cross-sectional view of the seat covering material 110. Figure 9 is a cross-sectional view of the seat covering material 110 before welding. As shown in Figures 8 and 9, the seat covering material 110 has a back surface material 111, a wadding material 112, an intermediate covering material 114, and a seating surface covering material 113. Furthermore, by welding the seat covering material 110, the back surface material 111, the intermediate covering material 114, and the seating surface covering material 113 are high-frequency welded to one another with the wadding material 112 sandwiched therebetween.

[0074] Here, we will briefly explain welding. Welding is a processing technique in which high-frequency electromagnetic waves or ultrasonic waves are applied to resin molded bodies that are already joined together to heat them internally, temporarily melting the joints and then solidifying them to weld them together. Since welding does not apply heat to the outer surfaces of the resin molded bodies, it is possible to weld them together without damaging their appearance. In other words, welding is used to weld multiple resin molded bodies together while suppressing damage to the outer surfaces due to heat.

[0075] The back surface material 111 is a stretchable sheet material that covers the wadding material 112 in cooperation with the seating surface cover material 113 (described later). The back surface material 111 is a polyvinyl chloride sheet having a thickness of 0.25 mm. More specifically, the back surface material 111 is formed into a sheet shape by a calendaring method or a casting method. By using polyvinyl chloride for the back surface material 111, the back surface material 111 can be easily melted by welding, thereby enabling it to be welded to the intermediate cover material 114 and the seating surface cover material 113. It goes without saying that the thickness of the back surface material 111 is not limited to 0.25 mm. The back surface material 111 corresponds to the first cover material of the present invention.

[0076] 8, the back surface material 111 is a sheet material having a wadding material contact surface 111a that comes into surface contact with the wadding material 112 and a bottom plate contact surface 111b that comes into contact with the bottom plate. The wadding material contact surface 111a and the bottom plate contact surface 111b face each other. The wadding material contact surface 111a corresponds to the first contact surface of the present invention, and the bottom plate contact surface 111b corresponds to the first opposing surface of the present invention.

[0077] The wadding material contact surface 111a and the bottom plate contact surface 111b are each textured. This allows the wadding material contact surface 111a to have a smaller surface roughness than the bottom plate contact surface 111b, making it possible to prevent the surface of the wadding material 112 from wearing down due to contact with the wadding material contact surface 111a. Furthermore, since the bottom plate contact surface 111b has a larger surface roughness than the wadding material contact surface 111a, it is possible to prevent the back surface material 111 from shifting position relative to the bottom plate.

[0078] The wadding material 112 is a flexible foamed resin molded body. The wadding material 112 is used to improve the seating comfort of a rider seated on the motorcycle seat 101 and reduce fatigue of the occupant. The wadding material 112 is a cushioning material made of foamed polyurethane with a thickness of 5 millimeters. However, the wadding material 112 is not limited to polyurethane. The wadding material 112 may also be made of biomass urethane. Using a wadding material 112 made of biomass urethane can improve compatibility with the global environment. The wadding material 112 is preferably a foamed resin molded body. This allows the back surface material 111, intermediate skin material 114, and seating surface skin material 113, which are melted by welding, to penetrate and be welded to each other.

[0079] The thickness of the wadding material 112 is not limited to 5 millimeters. The wadding material 112 may have a thickness of 10 millimeters. However, if the wadding material 112 is too thick, the welding strength between the back surface material 111, the intermediate cover material 114, and the seating surface cover material 113 will decrease, and there is a risk of them peeling off from one another. Furthermore, if the wadding material 112 is too thin, the seating comfort of the motorcycle seat 101 will decrease. Therefore, it is preferable that the wadding material 112 have a thickness of 5 millimeters or more and 10 millimeters or less.

[0080] The seating surface cover material 113 is made of a stretchable synthetic leather material, and covers the wadding material 112 together with the back surface material 111. The seating surface cover material 113 is arranged on the seating surface side and serves as a surface protective layer that protects the motorcycle seat 101. The seating surface cover material 113 has a laminated structure and includes a cover material main body 1131 and a base fabric 1132. The cover material main body 1131 and the base fabric 1132 are bonded to each other. The seating surface cover material 113 corresponds to the second cover material of the present invention.

[0081] The cover material main body 1131 is a polyvinyl chloride sheet having a thickness of 0.8 millimeters. By covering the seating surface side of the seating surface cover material 113 with the cover material main body 1131, the design of the motorcycle seat 101 can be improved. The thickness of the cover material main body 1131 is not limited to 0.8 millimeters. The cover material main body 1131 only needs to have a thickness necessary to protect the motorcycle seat 101 from external influences.

[0082] The base fabric 1132 is made of a water-absorbent material. More specifically, the base fabric 1132 is made of a fabric formed by knitting polyethylene terephthalate (PET) fibers and has a knitted structure. As a result, the base fabric 1132 has a mesh-like pattern of through-holes. The through-holes penetrate the base fabric 1132 in the thickness direction. Therefore, the polyvinyl chloride skin main body 1131 melts when welded, passes through the through-holes in the base fabric 1132 arranged on the intermediate skin material 114 side, and is welded to the back surface material 111 and the intermediate skin material 114.

[0083] An intermediate skin material 114 is provided between the wadding material 112 and the seating surface skin material 113. The intermediate skin material 114 improves the welding strength between the back surface material 111 and the seating surface skin material 113 and prevents them from peeling apart. The intermediate skin material 114 is 0.25 mm thick and is made of the same material as the back surface material 111 and the seating surface skin material 113, i.e., a sheet of polyvinyl chloride. Therefore, when welding is performed, it melts together with the back surface material 111 and the seating surface skin material 113, forming a high-frequency welded part 120 and firmly welding them together.

[0084] Fig. 10 shows a cross-sectional view of a conventional seat covering material 210. As shown in Fig. 10, the conventional seat covering material 210 has a laminated structure of a back surface material 211, a wadding material 212, and a seating surface covering material 213. The wadding material 212 and the base fabric 2132 are disposed between the back surface material 211 and the covering material main body 2131 without an intermediate covering material 114 interposed therebetween. Therefore, although the back surface material 211 and the seating surface covering material 213 are fused by welding, the welding strength between the back surface material 211 and the seating surface covering material 213 decreases over time, which could lead to peeling.

[0085] 8 and 9, the seat cover material 110 of the present invention has an intermediate cover material 114 made of the same material (polyvinyl chloride) sandwiched between the base fabric 1132 and the wadding material 112. Therefore, the back surface material 111 and the seating surface cover material 113 (cover material main body 1131) can be firmly welded via the intermediate cover material 114. This makes it possible to prevent peeling between the back surface material 111 and the seating surface cover material 113.

[0086] The intermediate cover material 114 has a wadding contact surface 114a that comes into surface contact with the wadding material 112, and a base fabric contact surface 114b that comes into contact with the base fabric 1132. The wadding contact surface 114a and the base fabric contact surface 114b face each other (the wadding contact surface 114a and the base fabric contact surface 114b are opposite surfaces). The wadding contact surface 114a corresponds to the intermediate contact surface of the present invention, and the base fabric contact surface 114b corresponds to the intermediate opposing surface of the present invention.

[0087] The wadding contact surface 114a and the base cloth contact surface 114b are each subjected to a textured finish. This gives the wadding contact surface 114a a smaller surface roughness than the base cloth 1132 and the base cloth contact surface 114b. In other words, the intermediate cover material 114 protects the wadding material 112 from the seating surface cover material 113, and makes it possible to suppress wear on the surface of the wadding material 112.

[0088] <<Regarding Peel Strength>> A test piece measuring 30 mm wide and 150 mm long was cut out from the resulting seat covering material 110. The seating surface covering material 113 was then peeled off from the test piece by 80 mm along the length. A peel test was then performed using a tensile tester on the remaining 70 mm longitudinal section where the back surface material 111 and the seating surface covering material 113 were welded to each other, and the peel strength (N / 30 mm) was measured. The same procedure was repeated multiple times to calculate the average peel strength, resulting in a peel strength of 26.1 N / 30 mm.

[0089] Similarly, a test piece measuring 30 mm wide and 150 mm long was cut from the conventional seat covering material 210 and subjected to a peel test to measure the peel strength. The same procedure was repeated multiple times to calculate the average peel strength, resulting in a peel strength of 5.0 N / 30 mm. These measurement results show that by providing the intermediate covering material 114 between the wadding material 112 and the seating surface covering material 113, the peel strength of the welded area was improved from 5.0 N / 30 mm to 26.1 N / mm, thereby preventing peeling between the back surface material 111 and the seating surface covering material 113.

[0090] <<Manufacturing Method of Seat Covering Material>> Next, a manufacturing method of the seat covering material 110 will be described with reference to Fig. 11. Fig. 11 is a flow chart showing the manufacturing process of the seat covering material 110. As an example, the following describes a case in which vibration energy of an ultrasonic vibrator is applied to the seat covering material 110 and the seat covering material 110 is pressed in the thickness direction to perform welding.

[0091] First, the seat cover material 110 is laminated (laminating step St1). Specifically, the back surface material 111, the wadding material 112, the intermediate cover material 114, and the seating surface cover material 113 that constitute the seat cover material 110 are laminated in this order.

[0092] Next, the seat cover material 110 is pressurized (pressurizing step St2). Specifically, the seat cover material 110 is pressurized by pressing an air cylinder or a hydraulic cylinder against the upper or lower surface of the seat cover material 110. This pressurization forms a depression in the seat cover material 110.

[0093] Next, the seat covering material 110 is welded (welding step St3). Specifically, ultrasonic vibration energy is applied to the upper or lower surface of the seat covering material 110. The vibration energy heats the seat covering material 110 from the inside, melting at least the back surface material 111, the intermediate cover material 114, and the seating surface cover material 113. After this, the back surface material 111, the intermediate cover material 114, and the seating surface cover material 113 are solidified and welded to each other, forming the high-frequency welded portion 120.

[0094] Finally, the seat cover material 110 is cut to the desired dimensions and shape (cutting step St4). As a result, the seat cover material 110 can form the seating surface 102A of the motorcycle seat 101. This completes the manufacturing of the seat cover material 110. Furthermore, the manufacturing of the motorcycle seat 101 is completed by covering the bottom plate with the seat cover material 110.

[0095] While the seat covering material 110 and the motorcycle seat 101 according to one embodiment of the present invention have been described above, the above-described embodiment is merely an example for facilitating understanding of the present invention and is not intended to limit the present invention. In other words, the present invention may be modified or improved without departing from the spirit thereof, and of course, the present invention also includes equivalents thereof.

[0096] In the above-described embodiment, the seat covering material 110 is described as being welded by ultrasonic waves, but this is not limiting. The seat covering material 110 may also be welded by internal heating using high-frequency electromagnetic waves. Alternatively, the seat covering material 110 may be welded using laser light. In such a case, since the seat covering material 110 can be internally heated, the aesthetic appearance of the seat covering material 110 can be improved compared to when external heating is used.

[0097] In the above-described embodiment, a motorcycle seat 101 mounted on a motorcycle V has been given as an example of a vehicle seat, and an example of its configuration has been described. However, the present invention is not limited to seats mounted on ground vehicles having wheels, such as automobiles and trains, and may also be applied to seats mounted on aircraft, ships, and other vehicles that move on non-ground surfaces, for example.

[0098] <<Appendix>> The above-mentioned problem is solved by the upholstery material of the present invention, which is an upholstery material used for a vehicle seat, comprising a first upholstery material, a wadding material placed overlying the first upholstery material, a second upholstery material placed overlying the wadding material, and an intermediate upholstery material placed between the wadding material and the second upholstery material, wherein the first upholstery material, the second upholstery material, and the intermediate upholstery material are welded to one another, and the intermediate upholstery material contains the same material as the first upholstery material and the second upholstery material.

[0099] According to the above configuration, an intermediate skin is interposed between the first skin (back surface) and the second skin (seat surface skin), and the intermediate skin contains the same material as the back surface and seat surface skin. Therefore, the back surface and seat surface skin are more firmly welded via the intermediate skin. This makes it possible to prevent separation of the welded portions of the back surface and seat surface skin. Furthermore, because the intermediate skin is interposed between the wadding and the seat surface skin, the intermediate skin covers the surface of the wadding, thereby protecting the wadding from abrasion. This makes it possible to prevent abrasion of the surface of the cushion (the surface that comes into contact with the back surface or seat surface skin).

[0100] The first skin may be a back surface material, and the second skin may be a skin material disposed on the seating surface side, with a base fabric on the intermediate skin side, and the base fabric may have through-holes that penetrate through the thickness direction. According to the above configuration, the base fabric between the second skin (seat-surface skin material) and the wadding has through-holes, so the seating surface skin material penetrates the through-holes and is firmly welded to the intermediate skin material and the back surface material. This ensures the strength of the seating surface skin material while preventing separation of the welded portions between the back surface material and the seating surface skin material.

[0101] The through-holes may be formed in a mesh pattern. According to the above configuration, the base fabric between the seating surface cover material and the wadding is formed with a mesh pattern of through-holes. Therefore, the seating surface cover material passes through the through-holes and is uniformly welded to the intermediate cover material and the back surface material. This effectively prevents separation of the welded portions of the back surface material and the seating surface cover material.

[0102] The first skin material, the second skin material, and the intermediate skin material may be made of polyvinyl chloride. According to the above configuration, the first skin material (back surface material), the second skin material (seat surface skin material), and the intermediate skin material can be welded to each other by welding, which makes it possible to prevent separation of the welded portions of the back surface material and the seat surface skin material.

[0103] The first skin material has a first contact surface that comes into surface contact with the wadding material and a first opposing surface that faces the first contact surface, and the surface roughness of the first contact surface is preferably smaller than the surface roughness of the first opposing surface. According to the above configuration, the surface roughness of the first contact surface of the first skin material (back surface material) that comes into surface contact with the wadding material is small, making it possible to suppress wear of the wadding material that comes into contact with the first contact surface.

[0104] The intermediate skin material preferably has an intermediate contact surface that comes into surface contact with the wadding material and an intermediate opposing surface that faces the intermediate contact surface, and the surface roughness of the intermediate contact surface is preferably smaller than the surface roughness of the intermediate opposing surface. According to the above configuration, the surface roughness of the intermediate contact surface that comes into surface contact with the wadding material is small, making it possible to suppress wear of the wadding material that comes into contact with the intermediate contact surface.

[0105] The above-mentioned problems are also solved by a vehicle seat covered with the above-mentioned cover material. With the above-mentioned configuration, it is possible to prevent separation of the welded portion between the backing material and the seating surface cover material. It is also possible to prevent wear of the surface of the wadding material that comes into contact with the backing material or the seating surface cover material.

[0106] According to the present invention, it is possible to prevent separation of the welded portion between the backing material that covers the wadding and the seating surface cover material. Also, according to the present invention, it is possible to prevent wear on the surface of the wadding.

[0107] DESCRIPTION OF SYMBOLS S, S2, S3 Vehicle seat 1, 41 Seat cushion 2 Seat back 2a Front end 3 Headrest 4 Reclining device 5 Rail device 5a Lower rail 5b Upper rail 6 Height link device 6a Link member 10 Cushion frame 10a First side frame 10b Second side frame 10c Rear frame 10d Front frame 10e Pan frame 10f Connecting bracket 11 Pad material 11a Rear end portion 11b Storage recess 11c Rear hanging groove 11d Front hanging groove 11e Front end portion 12 Cover material 13 Pressure receiving member 13a Rear hook portion 13b Rear portion 13c Central portion 13d Front portion 13e Front hook portion 14 Temperature adjustment member 15 Temperature control member 15a Lower end portion 15b LIST OF REFERENCE NUMERALS 16 Upper end portion 16 Cover member 20 Back frame 21 Back pad material 22 Back covering material 30 Headrest pillar 101 Motorcycle seat 102 Front seating portion 102A Seating surface 103 Rear seating portion 104 Non-seating portion 110 Seat covering material 111 Back surface material 111a Wadding material contact surface 111b Bottom plate contact surface 112 Wadding material 113 Seating surface covering material 1131 Covering material main body 1132 Base fabric 114 Intermediate covering material 114a Wadding material contact surface 114b Base fabric contact surface 120 High frequency welded portion 210 Seat covering material 211 Back surface material 212 Wadding material 213 Seating surface covering material 2131 Covering material main body 2132 Base fabric V Motorcycle B Body

Claims

1. A vehicle seat provided with a seat cushion, the seat cushion comprising: a cushion frame; a padding material disposed on the cushion frame; a temperature adjustment member disposed on the padding material and adjusting the temperature of the seating surface of the seat cushion; and a temperature control member connected to the temperature adjustment member and controlling the temperature of the temperature adjustment member, the cushion frame comprising: a first side frame and a second side frame disposed and spaced apart in the seat width direction; and a rear frame connecting rear portions of the first side frame and the second side frame, the temperature control member being disposed between the rear frame and the padding material in the fore-and-aft direction, and at least a portion of the temperature control member being disposed in a position that overlaps with the rear frame in the fore-and-aft direction in the up-and-down direction.

2. The vehicle seat according to claim 1, wherein the upper end of the temperature control member is positioned below the upper end of the rear frame and above the lower end of the rear frame.

3. A vehicle seat as described in claim 1 or 2, characterized in that a storage recess for storing the temperature control member is formed at the rear end of the pad material, the temperature control member is arranged so as to be inclined inside the storage recess, and the lower end of the temperature control member is arranged forward of the upper end of the temperature control member.

4. A vehicle seat as described in claim 1 or 2, characterized in that the seat cushion has a skin material covering the pad material, a portion of the skin material is positioned rearward of the rear frame, and the temperature adjustment member is fixed to the pad material.

5. A vehicle seat as described in claim 1 or 2, characterized in that the seat cushion has a skin material covering the pad material, a hanging groove is formed on the upper surface of the pad material for hanging the skin material onto the pad material, and the upper end of the temperature control member is positioned so as to overlap the hanging groove in the front-to-rear direction in the vertical direction.

6. A vehicle seat as described in claim 1 or 2, characterized in that the seat cushion has a skin material covering the pad material, a hanging groove is formed on the upper surface of the pad material for hanging the skin material onto the pad material, and the temperature control member is positioned below an imaginary line connecting the upper end of the rear frame and the lower end of the hanging groove.

7. A vehicle seat as described in claim 1 or 2, characterized in that the cushion frame has a front frame connecting the front portion of the first side frame and the front portion of the second side frame, and the temperature control member is positioned below an imaginary line connecting the upper end of the rear frame and the upper end of the front frame.

8. A vehicle seat as described in claim 1 or 2, comprising: a seat back; and a reclining device that rotatably connects the seat back to the seat cushion, wherein the seat back has a back frame that is connected to the cushion frame via the reclining device, and the reclining device switches the seat back between a normal state in which an occupant can be seated and a reclined state in which the seat back is rotated rearward from the normal state, and when the seat back is in the normal state, the temperature control member is positioned forward of the front end of the seat back.

9. A vehicle seat as described in claim 1 or 2, characterized in that the cushion frame has a front frame connecting the front portion of the first side frame and the front portion of the second side frame, the seat cushion has a pressure-receiving member that is spanned between the rear frame and the front frame and supports the pad material, the rear portion of the pressure-receiving member is positioned between the pad material and the rear frame in the fore-and-aft direction, and at least a portion of the temperature control member is positioned in a position that overlaps in the fore-and-aft direction with the rear frame and the rear portion of the pressure-receiving member in the up-and-down direction.

10. A vehicle seat as described in claim 1 or 2, characterized in that the seat cushion has a skin material that covers the pad material, and a cover member that is attached to the skin material and covers the temperature control member, a portion of the skin material being positioned rearward of the rear frame, and the cover member being positioned between the pad material and the rear frame in the fore-and-aft direction, extending from the rear end of the pad material to the underside, and covering the temperature control member from behind and below.

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