JP7684549B2 - Vehicle seats - Google Patents

Description

The present invention relates to a vehicle seat.

Conventionally, a technology is known for heating the seat surface of a vehicle seat by arranging a seat heater inside the seat cover of the vehicle seat. For example, Patent Document 1 discloses a vehicle seat in which the seat heater is provided with a metal heater wire that becomes heated when electricity is passed through it, and the heater wire is arranged to extend in the front-to-rear direction of the seat cushion or the up-and-down direction of the seat back while snaking left and right.

JP 2018-052498 A

Since the seat cover needs to be attached in a state where it is in close contact with the surface of the pad in the seat cushion and the seat back, a recess such as a groove is formed in the surface of the pad, and the seam of the seat cover is hung in the groove to be attached. At this time, the heater wire arranged inside the seat cover is connected to a connector that is connected to an electric wire on the vehicle body side in a state of a one-piece closed circuit, so it may be arranged across the groove of the pad.
However, the groove portion of the pad is recessed more than the surrounding area and is easily deformed, and the stitching of the seat cover is also suspended, making the structure complicated. Therefore, when arranging the seat heater inside the seat cover, care must be taken to prevent the heater wire from breaking, which can limit the freedom of layout of the seat heater.

The present invention was made in consideration of the above circumstances, and its objective is to improve the freedom of layout of seat heaters.

In order to solve the above problems, the present invention provides a vehicle seat,
A seat body on which an occupant sits;
a seat heater provided in the seat body and configured to heat a seat surface of the seat body by a heating element;
A wireless power supply mechanism that supplies power to the seat heater,
The sheet body includes:
The seat frame that forms the framework,
A pad supported by the seat frame;
a seat cover that covers the seat frame and the pad,
The wireless power supply mechanism includes:
A power transmission unit that receives power from a power supply unit;
A power receiving unit that wirelessly receives power from the power transmitting unit,
the power receiving portion has a first portion disposed on a front surface side of the pad, a second portion disposed on a rear surface side of the pad, and a third portion connecting the first portion and the second portion;
The heating element is disposed in the first portion, and a receiving means for receiving power wirelessly from the power transmitting unit is disposed in the second portion,
The third portion is embedded in the pad .

The invention described in claim 2 is the vehicle seat described in claim 1,
The heating element is disposed inside the seat cover.

The invention described in claim 3 is the vehicle seat described in claim 1 or 2 ,
the power transmitting unit and the power receiving unit are disposed at an interval in a front-back direction of the sheet body and overlap each other in the front-back direction of the sheet body ,
The power transmitting unit and the second portion of the power receiving unit are arranged to overlap each other.

The invention described in claim 4 is the vehicle seat described in any one of claims 1 to 3 ,
The pad is characterized in that a through hole is formed in the front-back direction of the pad, through which the third portion passes.
The invention described in claim 5 is the vehicle seat described in claim 4,
The seat body has a hanging portion formed by hanging a part of the seat cover into a recessed groove formed in the pad,
The through hole is provided at a position that avoids the hanging portion.
The invention described in claim 6 is the vehicle seat described in claim 4,
The seat body has a hanging portion formed by hanging a part of the seat cover into a recessed groove formed in the pad,
The through holes are provided at positions that sandwich the hanging portion.

The invention described in claim 7 is the vehicle seat described in any one of claims 1 to 6 ,
The seat frame has side frames constituting left and right frameworks,
The power transmitting unit is characterized in that it is attached along the side frame.

The invention described in claim 8 is the vehicle seat described in claim 7 ,
The power transmission unit is characterized in that it is attached to an inner surface of the side frame in the left-right direction.

The invention described in claim 9 is the vehicle seat described in any one of claims 1 to 8 ,
The seat body has a hanging portion formed by hanging a part of the seat cover into a recessed groove formed in the pad,
The heating element is characterized in that it is disposed so as to avoid the hanging portion .
The invention described in claim 10 is the vehicle seat described in any one of claims 1 to 9,
The power receiving unit is characterized in that a plurality of the power receiving units are arranged on the seat body.
The invention described in claim 11 is the vehicle seat described in any one of claims 1 to 10,
The power receiving portions are disposed on both sides of the seat body at a central location in the left-right direction.

According to the invention described in claim 1, the power receiving unit that receives power wirelessly from the power transmitting unit functions as a heating element in the seat heater, so the position of the power receiving unit can be changed within the range where it can receive power wirelessly from the power transmitting unit. This improves the degree of freedom in the layout of the seat heater.

According to the second aspect of the present invention, since the heating element is disposed inside the seat cover, the surface of the seat body can be easily heated by the heating element.

According to the invention described in claim 3 , the power transmission unit and the second portion of the power receiving unit are arranged in an overlapping manner, so that the second portion receives wireless power supply from the power transmission unit, and the surface of the seat body can be heated by the first portion arranged on the surface side of the pad.

According to the invention described in claim 4 , a through hole is formed in the pad along the front-to-back direction of the pad through which the third portion of the power receiving unit passes. Therefore, even if the pad is deformed, the third portion connecting the first portion and the second portion can suppress misalignment between the first portion and the second portion.
According to the fifth and sixth aspects of the invention, the same effects as those of the fourth aspect of the invention can be obtained.

According to the invention described in claim 7 , the power transmission unit is attached along the side frame of the seat frame, so that the power transmission unit is positioned at a position shifted to the left or right from the left-right center of the seat body, thereby preventing the comfort of the occupant sitting in the seat body from being impaired.

According to the invention described in claim 8 , the power transmission unit is attached to the inner left-right surfaces of the side frame of the seat frame, which contributes to reducing the size of the seat body compared to a case in which the power transmission unit is attached to, for example, the outer left-right surfaces.

According to the invention described in claim 9 , the heating element is positioned to avoid the recess formed on the surface of the seat body, so that it is less subject to structural restrictions that would arise if the heating element were positioned across the recess, and the freedom of layout of the seat heater can be improved.
According to the inventions set forth in claims 10 and 11, the same effects as those of the inventions described above can be obtained.

1 is a side view illustrating an overview of a vehicle seat equipped with a seat heater; FIG. 2 is a perspective view showing a configuration of a seat frame. 10 is a plan view showing an example of the arrangement of a wireless power supply mechanism with respect to a seat cushion frame. FIG. 11 is a plan view showing an example of the arrangement of a power receiving portion with respect to a seat cushion. FIG. 11 is a front view showing an example of the arrangement of a power receiving unit with respect to a seat back. FIG. 13A and 13B are diagrams illustrating modified examples of the seat heater and the wireless power supply mechanism. 13A and 13B are diagrams illustrating modified examples of the seat heater and the wireless power supply mechanism.

The following describes the embodiments of the present invention with reference to the drawings. However, the embodiments described below have various limitations that are technically preferable for implementing the present invention, but the technical scope of the present invention is not limited to the following embodiments and illustrated examples.

Furthermore, the vehicle seat described below includes vehicle seats for ships, airplanes, snowmobiles, personal watercraft, etc., but mainly refers to a vehicle seat, and examples of vehicles include not only straddle-type or non-straddle-type motorcycles and automobiles (passenger cars), but also bicycles, mopeds, construction vehicles, military vehicles, industrial vehicles, railroad cars, and agricultural vehicles such as tillers and tractors. An occupant sits in the vehicle seat.
In this embodiment, a vehicle seat 10 for an automobile will be described as an example.

The vehicle seat 10 includes at least a seat cushion 11 that supports a person's thighs and buttocks as a seat body, a seat back 12 whose lower end is supported by the seat cushion 11 and serves as a backrest, a reclining mechanism 13 that tilts the seat back 12 relative to the seat cushion 11, and a headrest 14 that supports the person's head. Such a seat body is supported by a support base 16 that is fixed to the body 1 of the automobile.
Furthermore, auxiliary supports such as armrests for supporting the person's arms and ottomans for supporting the person's legs are provided as necessary.
The support base 16 has a slide mechanism that slides the seat body at least in the front-rear direction (and the left-right direction), and a height adjustment mechanism that adjusts the height of the seat body.

The vehicle seat 10 is constructed by covering a seat frame 20 forming a framework, a pad 30 supported by the seat frame 20, and a seat cover 40 serving as a surface layer.
The seat cover 40 is formed by sewing together a number of cover members. Since the seat cover 40 needs to be attached in a state of being in close contact with the surface of the pad 30 of the seat cushion 11 and the seat back 12, a groove capable of accommodating the stitched portion of the seat cover 40 is formed on the surface of the pad 30. The stitched portion of the seat cover 40 is accommodated in the groove while being pulled from the back side (from below in the case of the seat cushion 11, and from behind in the case of the seat back 12). In order to maintain the state in which the stitched portion of the seat cover 40 is pulled from the back side, a clip or the like that engages with the seat frame 20 is appropriately used.
The areas where the stitched portions of the seat cover 40 are thus stored in the grooves of the pad 30, resulting in unevenness (depressions) on the surfaces of the seat cushion 11 and the seat back 12, will hereinafter be referred to as hanging portions 11a, 12a (see Figures 4 and 5).

The seat frame 20 and pad 30 are provided with electrical equipment, control devices, etc., necessary to provide various functions to the vehicle seat 10. The seat cover 40 also covers these electrical equipment, control devices, etc.

As shown in FIG. 2, the seat frame 20 includes a seat cushion frame 21 that forms the framework of the seat cushion 11, a seat back frame 22 that forms the framework of the seat back 12, and a head rest frame (not shown) that forms the framework of the head rest 14.

A pad 30 is provided on the seat cushion frame 21, and the seat cushion frame 21 and the pad 30 are covered by a seat cover 40.

The seat cushion frame 21 has a pair of left and right cushion side frames 21a, 21b, a back pipe frame 21c, a pan frame 21d, and a pressure-receiving member 21e.

The pair of left and right cushion side frames 21a, 21b are elongated in the front-rear direction, and their rear ends are connected to the seat back frame 22 via the reclining mechanism 13.

The back pipe frame 21c is made of pipe material. The back pipe frame 21c spans between the rear ends of the pair of left and right cushion side frames 21a, 21b that are curved upward, and connects the rear ends of the pair of left and right cushion side frames 21a, 21b.

The pan frame 21d is a pressure-receiving member made of a metal or resin plate that receives the weight of the occupant, connects the front ends of the cushion side frames 21a and 21b, and is located below the occupant's thighs when seated in the normal driving position.

The pressure-receiving member 21e is formed, for example, of an S-spring, with its rear end hooked to the back pipe frame 21c and its front end hooked to the rear end of the pan frame 21d. This pressure-receiving member 21e is located below the buttocks of the occupant when seated in the normal driving position.

A pad 30 is provided in front of the seat back frame 22, and the seat back frame 22 and the pad 30 are covered by a seat cover 40 that forms the surface of the seat back 12.

The seat back frame 22 has a pair of left and right back side frames 22a, 22b, an upper frame 22c, a lower frame 22d, a pressure-receiving member 22e, and a pair of holders 22f.

The pair of left and right back side frames 22a, 22b are formed long in the vertical direction, and their lower ends are connected to the seat cushion frame 21 via the reclining mechanism 13.

The upper frame 22c is made of a pipe material and is bent into a U-shape, and its left and right ends (lower ends) are welded and joined to the upper ends of the pair of left and right back side frames 22a, 22b, thereby connecting the upper ends of the back side frames 22a, 22b.
In the present embodiment, the upper frame 22c is a pipe material, but it may be formed by processing a metal plate.

The lower frame 22d is formed by processing a metal plate, and the left and right ends are welded and joined to the rear sides of the lower ends of the pair of left and right back side frames 22a, 22b, connecting the lower ends of each back side frame 22a, 22b.

The pressure-receiving member 22e is composed of, for example, an S-spring, and its left and right ends are attached to the inside in the left-right direction of the pair of left and right back side frames 22a, 22b. This pressure-receiving member 22e is located behind the back of the occupant when seated in the normal driving position.

The pair of holders 22f are cylindrical bodies that hold headrest guides into which the pillars of the headrest 14 are inserted, and are positioned apart on the left and right in the center of the upper frame 22c.

1, the vehicle seat 10 configured as above is provided with, as an electrical component, a seat heater SH for heating the seat surface of the vehicle seat 10. More specifically, the seat heater SH is provided on the inside of the seat cover 40 of the seat cushion 11 and the seat back 12 of the vehicle seat 10.
The seat heater SH supplies power to a heating element via a wireless power supply mechanism 50 , and the wireless power supply mechanism 50 includes a power transmitting unit 51 and a power receiving unit 52 .

Here, examples of a method (wireless power supply method) by which the wireless power supply mechanism 50 supplies power wirelessly (i.e., contactlessly) include an electromagnetic induction method, a magnetic resonance method, an electric field coupling method, and a radio wave reception method.
The electromagnetic induction method is a method in which an induced magnetic flux is generated between a transmitting coil and a receiving coil by passing a current through the transmitting coil while the coils are close to each other, and an induced electromotive force is generated in the receiving coil using this induced magnetic flux as a medium.
The magnetic resonance method is a method in which a coil and a capacitor are embedded in the transmitting side and the receiving side, and power is supplied by magnetically resonating the respective resonators.
The electric field coupling method is a method in which electrodes are installed on both the power transmitting side and the power receiving side, and power is supplied by utilizing the electric field that is generated when the electrodes are brought into close proximity to each other.
The radio wave reception method is a method of supplying power by converting electric current into electromagnetic waves on the power transmitting side and sending them to the power receiving side. In this radio wave reception method, the power receiving side receives electromagnetic waves from an antenna, converts them into direct current through a rectifier circuit, and uses them as power.

In this embodiment, an electromagnetic induction method is adopted as the wireless power supply method.
The power transmitting unit 51 is configured with a transmitting coil provided inside a housing, and receives power from the vehicle body 1 side.
The power receiving unit 52 is configured by arranging and fixing a receiving coil on a planar base material, and receives power wirelessly from the power transmitting unit 51. More specifically, an electromotive force is generated in the power receiving unit 52 through the medium of an induced magnetic flux generated by the power supplied from the vehicle body 1 to the power transmitting unit 51.

It is ensured that there is no obstacle, for example made of metal, between the power transmitting unit 51 and the power receiving unit 52 that would impede wireless power supply, or that no obstacle is disposed in a position through which magnetic flux passes.
In order to ensure good power transmission efficiency, the power transmitting unit 51 and the power receiving unit 52 are arranged to maintain a constant interval (constant distance) as much as possible. In other words, even if an occupant sits on the vehicle seat 10 and deformation of the pad 30 occurs, it is desirable to keep the interval between the power transmitting unit 51 and the power receiving unit 52 as constant as possible.
The distance between the power transmitting unit 51 and the power receiving unit 52 is arranged to be as short as possible in order to ensure good power transmission efficiency and to reduce the size of the power transmitting unit 51 .
Furthermore, in order to ensure good power transmission efficiency, the power transmitting unit 51 and the power receiving unit 52 are arranged as parallel as possible when viewed from the side.
In addition, in order to ensure good power transmission efficiency, the power transmitting unit 51 and the power receiving unit 52 are arranged so that the positional deviation in the vertical and horizontal directions is as small as possible. That is, it is desirable to reduce the positional deviation in the vertical and horizontal directions between the power transmitting unit 51 and the power receiving unit 52 when the surface of the sheet body is viewed vertically. More specifically, the power transmitting unit 51 and the power receiving unit 52 are arranged so as to overlap each other (described later).

At least the surface of the housing of the power transmitting unit 51 facing the power receiving unit 52 is made of a material such as resin that does not impede wireless power supply between the power transmitting unit 51 and the power receiving unit 52 .
The power transmitting unit 51 is attached to the inner left and right surfaces of the pair of left and right cushion side frames 21a, 21b of the seat cushion frame 21 and to the inner left and right surfaces of the pair of left and right back side frames 22a, 22b of the seatback frame 22.

The mounting position of the power transmission unit 51 is not limited to the above, and may be mounted on the upper surfaces of the cushion side frames 21a, 21b or on the outer left and right surfaces of the cushion side frames 21a, 21b, as shown in the example of the seat cushion frame 21 in Figure 3.
In the case of the seat back frame 22, the support member 24 may be attached to the front surface of the back side frames 22a, 22b or to the outer side surfaces in the left and right directions of the back side frames 22a, 22b.
Also, for example, the support members 21 may be attached to both the inner surfaces of the cushion side frames 21a, 21b in the left-right direction and the outer surfaces of the cushion side frames 21a, 21b in the left-right direction.

The power transmission unit 51 may be attached to the seat cushion frame 21 on the upper surface side of the back pipe frame 21c, the pan frame 21d, or the pressure receiving member 21e. In the case of the seat back frame 22, the power transmission unit 51 may be attached to the front surface side of the upper frame 22c, the lower frame 22d, or the pressure receiving member 22e. However, it is desirable to devise a way to avoid impairing the comfort of the occupant seated in the vehicle seat 10.

The power transmission unit 51 as described above is fitted into a recess or cutout (not shown) formed in the pad 30 of the seat cushion 11 and the seat back 12. It is covered by the seat cover 40 together with the pad 30. Since the power transmission unit 51 is provided in a state where it is enclosed in the pad 30, the comfort of the occupant seated in the vehicle seat 10 is not likely to be impaired by the power transmission unit 51.

In this embodiment, the power receiving portion 52 constitutes a heating element of the seat heater SH.
That is, the power receiving unit 52 has a function of receiving power wirelessly from the power transmitting unit 51, and also has a function of generating heat when current is applied thereto.
More specifically, the receiving coil in the power receiving unit 52 is made of a metal heater wire (heating wire) through which electricity can flow, and the heater wire functions as the receiving coil itself.

Such power receiving units 52 are provided in multiple units (pieces) for each of the seat cushion 11 and the seat back 12. In this embodiment, one power transmitting unit 51 is provided on each of the left and right sides of the seat cushion 11 and the seat back 12. A plurality of power receiving units 52 are assigned to each power transmitting unit 51 on one side. That is, in this embodiment, the ratio of the number of power transmitting units 51 to the number of power receiving units 52 that receive power wirelessly from the power transmitting units 51 is 1:N (N is a positive integer of 2 or more). However, this is not limited to this, and the ratio of the number of power transmitting units 51 to the number of power receiving units 52 that receive power wirelessly from the power transmitting units 51 may be 1:1.

In the present embodiment, the base material of the power receiving unit 52 is formed in a trapezoidal shape in a plan view as shown in Fig. 3. However, the shape of the base material may be a rectangular shape other than a trapezoid, or may be a circular shape, and is not particularly limited. In other words, the shape of the base material can be appropriately changed without departing from the spirit of the present invention.
The heater wire is fixed to the upper surface of such a substrate by, for example, an adhesive, but may also be fixed to the lower surface of the substrate, or may be sandwiched and fixed between upper and lower substrates, or may be provided in a state in which it is sewn inside one substrate.

The multiple power receiving units 52 are arranged so as to overlap the power transmitting units 51 .
That is, in the seat cushion 11, when viewed from above downward, the multiple power receiving units 52 are arranged so as to overlap with the power transmitting units 51 attached to the pair of left and right cushion side frames 21a, 21b (see Figure 3).
In addition, in the seat back 12, when viewed from the front to the rear, the multiple power receiving units 52 are arranged so as to overlap with the power transmitting units 51 attached to the pair of left and right back side frames 22a, 22b.
In other words, the power transmission unit 51 is not only positioned so as to overlap with multiple power receiving units 52 when projected from above (front) to below (rear), but is also set to a shape and size that enables it to overlap with multiple power receiving units 52.
Similarly, the power receiving units 52 are also set to have shapes and sizes that enable them to overlap with the power transmitting unit 51. The power receiving units 52 may each have a different shape and size.

As shown in FIGS. 4 and 5, the power receiving portions 52 are arranged on the front surface side (occupant side) of the pad 30, avoiding the hanging portions 11a, 12a of the seat cushion 11 and the seat back 12.
In addition, in the seat cushion 11, the multiple power receiving units 52 are arranged at a position closer to the center in the left-right direction than side bolsters 11b (also called banks), which are raised portions on both sides of the seat cushion 11. Note that the power receiving units 52 may be arranged at the side bolsters 11b.
In the seat back 12, the multiple power receiving units 52 are arranged both at the side bolsters 12b, which are raised portions on both sides of the seat back 12, and at a location toward the center in the left-right direction from the side bolsters 12b.

In the seat heater SH configured as above, the power transmission unit 51 receives power supply from the vehicle body 1. Therefore, although not shown, the power transmission unit 51 has a connector 4 (inverter) connected to the power supply unit 2 and earth 3 provided in the vehicle body 1 (see FIG. 6 ).
The power transmitting unit 51 further includes a controller that controls the voltage from the power transmitting unit 51 to the power receiving unit 52 to adjust the temperature of the power receiving unit 52 .
An on/off switch for turning on and off the power supply from the power supply unit 2 to the power transmission unit 51 is provided between the power supply unit 2 and the power transmission unit 51. When the power supply unit 2 is controlled by an ECU (Electronic Control Unit) constituting a control device of the vehicle, the on/off switch does not need to be provided between the power supply unit 2 and the power transmission unit 51. That is, for example, a button for operating the power supply unit 2 may be displayed on a navigation system for the vehicle, or a switch for operating the power supply unit 2 may be provided around an instrument panel (so-called instrument panel) so that the power supply to the power transmission unit 51 can be turned on and off. As with the on/off switch, the controller may also be provided with a button displayed on a navigation system for the vehicle, or a switch may be provided around an instrument panel.
Furthermore, an on/off switch or a controller may be provided separately for the seat cushion 11 and the seat back 12 .
The multiple power receiving units 52 may have a temperature sensor, and the sensing results of the temperature sensor may be used to control the power supply unit 2 or the power transmitting unit 51.

The multiple power receiving units 52 are made of metallic heater wires (electric heating wires) that can conduct electricity as described above, and the heater wires function as receiving coils as they are. Therefore, the heat lost when the magnetic field is converted from the power supply unit 2 and then converted back into electricity on the seat body side can be used as heat for the seat heater SH.

The vehicle seat 10 described above can heat the seat surface with the seat heater SH. This allows the occupant seated in the vehicle seat 10 to feel warmth in the thighs, buttocks, and areas extending from the waist to the back.

According to this embodiment, the following excellent effects are obtained.
The vehicle seat 10 in this embodiment includes a seat body on which an occupant sits, a seat heater SH that is provided in the seat body and heats the seat surface of the seat body with a heating element, and a wireless power supply mechanism 50 that supplies power to the seat heater SH, and the wireless power supply mechanism 50 has a power transmission unit 51 that receives power supply from a power source unit 2, and a power receiving unit 52 that receives power supply wirelessly from the power transmission unit 51, and since the power receiving unit 52 functions as a heating element in the seat heater SH, the position of the power receiving unit 52 can be changed within a range where it can receive power supply wirelessly from the power transmission unit 51. This improves the degree of freedom in the layout of the seat heater SH.

In addition, the power transmitting unit 51 and the power receiving unit 52 are arranged with a gap between them in the front-back direction of the sheet body, so that the power transmitting unit 51 is arranged away from the surface of the sheet body. Furthermore, the power transmitting unit 51 and the power receiving unit 52 are arranged overlapping each other in the front-back direction of the sheet body, so that even if the power transmitting unit 51 is arranged away from the surface of the sheet body, the power receiving unit 52 can receive power wirelessly from the power transmitting unit 51.

In addition, the ratio of the number of power transmission units 51 to the number of power reception units 52 that wirelessly receive power from the power transmission units 51 is 1:1 or 1:N (N is a positive integer of 2 or more), which increases the degree of freedom in the number of power reception units 52 relative to the number of power transmission units 51.

The seat body also includes a seat frame 20 that forms the framework, a pad 30 that is supported by the seat frame 20, and a seat cover 40 that covers the seat frame 20 and the pad 30. The heating element is located inside the seat cover 40, so that the surface of the seat body can be easily heated by the heating element.

In addition, since the power transmission unit 51 is attached along the side frames (cushion side frames 21a, 21b, back side frames 22a, 22b) of the seat frame 20, the power transmission unit 51 is positioned offset to the left or right from the center of the seat body in the left-right direction, which prevents the comfort of the occupant sitting in the seat body from being impaired.

In addition, since the power transmission unit 51 is attached to the inner left-right surfaces of the side frames (cushion side frames 21a, 21b, back side frames 22a, 22b) in the seat frame 20, it can contribute to making the seat body smaller than if it were attached to, for example, the outer left-right surfaces.
Furthermore, when the power transmitting unit 51 is attached to the outer lateral surfaces of the side frames (cushion side frames 21a, 21b, back side frames 22a, 22b) of the seat frame 20, the heating range of the seat heater SH can be expanded outward.
In addition, when the power transmitting unit 51 is attached to the front side (occupant side) of the side frames (cushion side frames 21a, 21b, back side frames 22a, 22b) of the seat frame 20, the power transmission efficiency can be improved when the power receiving unit 52 is arranged on the side bolsters 11b, 12b.

In addition, the heating element is positioned to avoid the recesses (hanging portions 11a, 12a) formed on the surface of the seat body, so there are fewer structural restrictions that would be imposed if the heating element were positioned across the recesses, improving the freedom of layout of the seat heater SH.

[Modifications]
The embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be modified as appropriate without departing from the spirit of the present invention. Modifications will be described below. The following modifications may be combined as far as possible.
In addition, in each of the following modified examples, elements common to the above embodiment are given the same reference numerals, and descriptions thereof will be omitted or simplified.

[Modification 1]
In the above embodiment, the power receiving portion 52 itself functions as a heating element in the seat heater SH. However, in this modified example, as shown in FIG. 6, the power receiving portion 52 is integrally connected to a heating element 52a.
That is, the power receiving unit 52 in this modified example has a function of wirelessly receiving power from the power transmitting unit 51. In other words, it is only necessary for the power receiving unit 52 in this modified example to be able to transmit the power wirelessly received from the power transmitting unit 51 toward the heating element 52a.

The vehicle seat 10 in this modified example includes a seat body on which an occupant sits, a seat heater SH that is provided on the seat body and heats the seat surface of the seat body with a heating element 52a, and a wireless power supply mechanism 50 that supplies power to the seat heater SH. The wireless power supply mechanism 50 has a power transmission unit 51 that receives power from a power source unit 2, and a power receiving unit 52 that receives power wirelessly from the power transmission unit 51. The power receiving unit 52 is integrally connected to the heating element in the seat heater SH, so that the position of the power receiving unit 52 can be changed within a range where power can be wirelessly received from the power transmission unit 51, and the position of the heating element 52a can be changed within a range where the connection with the power receiving unit 52 is not interrupted. This improves the degree of freedom in the layout of the seat heater SH.

[Modification 2]
As shown in FIG. 7 , the power receiving portion 52 in this modified example has a first portion 52a arranged on the front side of the pad 30, a second portion 52b arranged on the back side of the pad 30, and a third portion 52c connecting the first portion 52a and the second portion 52b.
In other words, the power receiving unit 52 has the first portion 52a, the second portion 52b, and the third portion 52c as portions corresponding to the pad 30. Therefore, the first portion 52a in this modification is a heating element as in the above modification 1, but is not limited to this, and the power receiving unit 52 itself may function as a heating element as in the above embodiment.

In this modified example, the second portion 52b has the function of receiving power wirelessly from the power transmission unit 51, and can flow the power received wirelessly from the power transmission unit 51 toward the first portion 52a, which is a heating element.
Furthermore, at least the second portion 52b of the power receiving portion 52 is disposed so as to overlap the power transmitting portion 51. Therefore, even if the pad 30 is deformed so that the first portion 52a does not overlap the power transmitting portion 51, the first portion 52a can receive power from the second portion 52b via the third portion 52c.

Furthermore, the pad 30 has a through hole 30a formed along the front-to-back direction of the pad 30, and the third portion 52c passes through the through hole 30a. In other words, the power receiving portion 52 is in a state where the third portion 52c is embedded in the pad 30.
7, the pad 30 is deformed, for example, by the load of an occupant. Therefore, the third portion 52c of the power receiving portion 52 is also deflected in accordance with the deformation of the pad 30. This allows the first portion 52a to receive power from the second portion 52b via the third portion 52c.

In this modified example, the power transmission unit 51 and the second portion 52b of the power receiving unit 52 are arranged so as to overlap each other, so that the second portion 52b receives wireless power from the power transmission unit 51, and the surface of the seat body can be heated by the first portion 52a arranged on the surface side of the pad 30.

In addition, the pad 30 is formed with a through hole 30a through which the third portion 52c of the power receiving portion 52 passes along the front-back direction of the pad 30, and the third portion 52c passes through this through hole 30a. Therefore, even if the pad 30 is deformed, the third portion 52c connecting the first portion 52a and the second portion 52b can suppress misalignment between the first portion 52a and the second portion 52b.

Reference Signs List 1 Vehicle body 2 Power supply unit 3 Earth 4 Connector 10 Vehicle seat 11 Seat cushion 11a Hanging portion 12 Seat back 12a Hanging portion 20 Seat frame 21 Seat cushion frame 21a Cushion side frame 21b Cushion side frame 22 Seat back frame 22a Back side frame 22b Back side frame 30 Pad 30a Through hole 40 Seat cover 50 Wireless power supply mechanism 51 Power transmission unit 52 Power receiving unit (heating element)
52a First section (heating element)
52b: second portion 52c: third portion SH: seat heater

Claims (11)

A seat body on which an occupant sits;
a seat heater provided in the seat body and configured to heat a seat surface of the seat body by a heating element;
A wireless power supply mechanism that supplies power to the seat heater,
The sheet body includes:
The seat frame that forms the framework,
A pad supported by the seat frame;
a seat cover that covers the seat frame and the pad,
The wireless power supply mechanism includes:
A power transmission unit that receives power from a power supply unit;
A power receiving unit that wirelessly receives power from the power transmitting unit,
the power receiving portion has a first portion disposed on a front surface side of the pad, a second portion disposed on a rear surface side of the pad, and a third portion connecting the first portion and the second portion;
The heating element is disposed in the first portion, and a receiving means for receiving power wirelessly from the power transmitting unit is disposed in the second portion,
The vehicle seat , wherein the third portion is embedded in the pad . 2. The vehicle seat according to claim 1, wherein the heating element is disposed inside the seat cover. the power transmitting unit and the power receiving unit are disposed at an interval in a front-back direction of the sheet body and overlap each other in the front-back direction of the sheet body ,
3. The vehicle seat according to claim 1, wherein the power transmitting portion and the second portion of the power receiving portion are arranged to overlap each other. The vehicle seat according to any one of claims 1 to 3 , wherein the pad is formed with a through hole extending along a front- rear direction of the pad, through which the third portion passes. The seat body has a hanging portion formed by hanging a part of the seat cover into a recessed groove formed in the pad,
The vehicle seat according to claim 4, wherein the through hole is provided at a position that avoids the hanging portion. The seat body has a hanging portion formed by hanging a part of the seat cover into a recessed groove formed in the pad,
The vehicle seat according to claim 4, wherein the through holes are provided at positions sandwiching the hanging portion. The seat frame has side frames constituting left and right frameworks,
The vehicle seat according to any one of claims 1 to 6 , wherein the power transmission unit is attached along the side frame. The vehicle seat according to claim 7 , wherein the power transmission unit is attached to an inner surface of the side frame in the left-right direction. The seat body has a hanging portion formed by hanging a part of the seat cover into a recessed groove formed in the pad,
9. The vehicle seat according to claim 1 , wherein the heating element is disposed so as to avoid the hanging portion . The vehicle seat according to any one of claims 1 to 9, wherein a plurality of the power receiving units are arranged on the seat body. 11. The vehicle seat according to claim 1, wherein the power receiving portions are disposed at both of the central portions of the seat body in the left-right direction.

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