JP6770904B2

JP6770904B2 - Heating element for seat heater, seat heater and seat

Info

Publication number: JP6770904B2
Application number: JP2017014610A
Authority: JP
Inventors: 宏之藤井; 橋本　健; 健橋本
Original assignee: Tachi S Co Ltd
Current assignee: Tachi S Co Ltd
Priority date: 2017-01-30
Filing date: 2017-01-30
Publication date: 2020-10-21
Anticipated expiration: 2037-01-30
Also published as: JP2018122639A

Description

本発明は、シートヒーター用発熱体及びシートヒーター並びにシートに関する。 The present invention relates to a heating element for a seat heater, a seat heater, and a seat.

シートクッションの座面及びシートバックの背もたれ面を加温するシートヒーターを備えたシートが知られている。シートヒーター用発熱体としては、不織布などの基材に発熱線が配線された面状の発熱体が一般に用いられており、この種の面状の発熱体は、典型的にはクッションパッドと、クッションパッドを覆うトリムカバーとの間に設置されている。 Seats equipped with a seat heater that heats the seat surface of the seat cushion and the backrest surface of the seat back are known. As a heating element for a seat heater, a planar heating element in which a heating wire is wired on a base material such as a non-woven fabric is generally used, and this type of planar heating element is typically a cushion pad and a heating element. It is installed between the trim cover that covers the cushion pad.

そして、トリムカバーのクッションパッドに対するフィット性を高めるべく、クッションパッドに溝部が形成され、トリムカバーが溝部に吊り込まれているシートにおいて、溝部の両側に加温域が設定される場合に、シートヒーター用発熱体は、溝部を挟んで配置される二つの加温部と、これら二つの加温部を連結し、撓められた状態で溝部に挿し込まれる連結部とを備える。発熱線は、連結部を介して両加温部に跨って配線される（例えば、特許文献１参照）。 Then, in a seat in which a groove is formed in the cushion pad and the trim cover is suspended in the groove in order to improve the fit of the trim cover to the cushion pad, a seat when heating areas are set on both sides of the groove. The heating element for a heater includes two heating portions arranged so as to sandwich the groove portion, and a connecting portion that connects these two heating portions and is inserted into the groove portion in a bent state. The heating wire is wired across both heating portions via a connecting portion (see, for example, Patent Document 1).

また、着座者の接触部位の中には、温感の知覚が相対的に早い部位（例えば大腿部や肩甲骨部）と、温感の知覚は相対的に遅い部位とが存在することが知られている。そこで、着座者の接触部位別に設けられる複数の発熱線（発熱体）を備え、まず温感の知覚が相対的に早い部位に相対して設けられる発熱線を発熱させ、その後に温感の知覚が相対的に遅い部位に相対して設けられる発熱線を発熱させることにより、快適感の早期向上及び消費電流の削減を図ったシートヒーターも知られている（例えば、特許文献２参照）。 In addition, among the contact parts of the seated person, there may be a part where the perception of warmth is relatively fast (for example, the thigh and the scapula) and a part where the perception of warmth is relatively slow. Are known. Therefore, a plurality of heat generating lines (heating bodies) provided for each contact portion of the seated person are provided, and first, the heating wire provided relative to the portion where the perception of warmth is relatively fast is generated, and then the perception of warmth is felt. There is also known a seat heater that aims at early improvement of comfort and reduction of current consumption by generating heat from a heating wire provided relative to a portion where the temperature is relatively slow (see, for example, Patent Document 2).

特開２０１５−２２５７３８号公報Japanese Unexamined Patent Publication No. 2015-225738 特開２００９−２６９４８０号公報JP-A-2009-269480

特許文献２に記載されたシートヒーターのように複数の発熱線が設けられる場合に、各発熱線に接続される給電線の取り回しを考慮すれば、各発熱線の給電接続部は一箇所に集約されていることが望ましい。しかし、給電接続部が一箇所に集約される場合に、多数の発熱線が連結部に配線される可能性がある。 When a plurality of heating wires are provided as in the seat heater described in Patent Document 2, the feeding connection portions of each heating wire are integrated in one place in consideration of the routing of the feeding wires connected to each heating wire. It is desirable that it is done. However, when the power supply connection portion is integrated in one place, a large number of heating wires may be wired to the connection portion.

連結部はクッションパッドの溝部に挿し込まれるところ、連結部に多数の発熱線が配線されることによって連結部の可撓性は低下する。連結部の可撓性が低下すると、連結部がクッションパッドの溝部に挿し込まれる際に連結部に過大な負荷が作用し、その結果、連結部に配線された発熱線が断線する虞がある。 When the connecting portion is inserted into the groove portion of the cushion pad, the flexibility of the connecting portion is reduced due to the wiring of a large number of heating wires in the connecting portion. If the flexibility of the connecting portion is reduced, an excessive load acts on the connecting portion when the connecting portion is inserted into the groove portion of the cushion pad, and as a result, the heating wire wired to the connecting portion may be disconnected. ..

本発明は、上述した事情に鑑みなされたものであり、発熱線の断線を抑制でき、快適感の早期向上及び消費電流の削減を図ることが可能な、シートヒーター用発熱体及びシートヒーター並びにシートを提供することを目的とする。 The present invention has been made in view of the above circumstances, and is capable of suppressing disconnection of the heating wire, improving comfort at an early stage, and reducing current consumption. Heating element for seat heater, seat heater, and seat. The purpose is to provide.

本発明の一態様のシートヒーター用発熱体は、シート幅方向に延びる溝部を表面に有するクッションパッドと上記溝部に吊り込まれた状態で上記クッションパッドを覆うトリムカバーとの間に設置されるシートヒーター用発熱体であって、上記クッションパッドの表面において上記シート幅方向と交差する方向に上記溝部を挟んで配置される第１加温部及び第２加温部と、上記第１加温部と上記第２加温部とを連結しており、上記溝部に挿し込まれる連結部と、上記第１加温部の一部に設定される局所加温部と、を備え、上記連結部を介して上記第１加温部及び上記第２加温部に跨って配線されている第１発熱線と、上記局所加温部に配線されている第２発熱線と、を含み、上記第１発熱線及び上記第２発熱線それぞれの給電接続部は、上記第１加温部において上記連結部が接続されている縁部を除く上記第１加温部の縁部に設けられ、上記連結部には上記第１発熱線のみが配線され、上記第１発熱線及び上記第２発熱線に対する電流供給を発熱線毎に制御可能に構成されている。 The heat generating body for a seat heater according to one aspect of the present invention is a seat installed between a cushion pad having a groove extending in the seat width direction on the surface and a trim cover covering the cushion pad while being suspended from the groove. A first heating portion and a second heating portion, which are heating elements for a heater and are arranged on the surface of the cushion pad in a direction intersecting the seat width direction with the groove portion interposed therebetween, and the first heating portion. The second heating portion is connected to the second heating portion, and the connecting portion is provided with a connecting portion inserted into the groove portion and a local heating portion set as a part of the first heating portion. The first heating wire including the first heating wire wired across the first heating portion and the second heating portion and the second heating wire wired to the local heating portion via the first heating portion. feed connection of the respective heating wire and the second heating wire is provided on the edge of the first heating portion except for the edges where the coupling portion is connected in the first heating unit, the connecting portion Only the first heating wire is wired in the above, and the current supply to the first heating wire and the second heating wire can be controlled for each heating wire .

また、本発明の一態様のシートヒーターは、上記シートヒーター用発熱体と、上記シートヒーター用発熱体の上記第１発熱線及び上記第２発熱線に供給される電流を制御する制御部と、を備え、上記制御部は、作動開始から所定タイミング到来までの起動時は、上記第２発熱線のみに対して電流供給制御を行い、上記所定タイミング到来後の定常時は、上記第１発熱線及び上記第２発熱線に対して電流供給制御を行い、上記定常時において上記第１発熱線及び上記第２発熱線に供給される合計の電流量は、上記起動時に上記第２発熱線に供給される電流量以下である。 Further, the seat heater according to one aspect of the present invention includes a heating element for the seat heater, a control unit for controlling the current supplied to the first heating wire and the second heating wire of the heating element for the seat heater. The control unit controls the current supply only to the second heating wire at the time of starting from the start of operation to the arrival of the predetermined timing, and at the steady state after the arrival of the predetermined timing, the first heating wire. And the current supply control is performed for the second heating wire, and the total amount of current supplied to the first heating wire and the second heating wire in the steady state is supplied to the second heating wire at the time of starting. It is less than or equal to the amount of current to be generated.

また、本発明の一態様のシートは、シート幅方向に延びる溝部を表面に有するクッションパッドと、上記溝部に吊り込まれた状態で上記クッションパッドを覆うトリムカバーと、上記シートヒーターとを備え、上記シートヒーターのシートヒーター用発熱体の第１加温部及び第２加温部は、上記クッションパッドの表面において上記シート幅方向と交差する方向に上記溝部を挟んで配置され、且つ上記シートヒーター用発熱体の連結部は、上記溝部に挿し込まれている。 Further, the seat of one aspect of the present invention includes a cushion pad having a groove portion extending in the seat width direction on the surface, a trim cover covering the cushion pad in a state of being suspended in the groove portion, and the seat heater. The first heating portion and the second heating portion of the seat heater heating element of the seat heater are arranged on the surface of the cushion pad in a direction intersecting the seat width direction with the groove portion interposed therebetween, and the seat heater. The connecting portion of the heating element for heating is inserted into the groove portion.

本発明によれば、発熱線の断線を抑制でき、快適感の早期向上及び消費電流の削減を図ることが可能な、シートヒーター用発熱体及びシートヒーター並びにシートを提供することができる。 According to the present invention, it is possible to provide a heating element for a seat heater, a seat heater, and a seat, which can suppress disconnection of a heating wire, improve a feeling of comfort at an early stage, and reduce current consumption.

本発明の実施形態を説明するための、シートの一例の斜視図である。It is a perspective view of an example of a sheet for demonstrating the embodiment of this invention. 図１のシートのＩＩ−ＩＩ線断面図である。FIG. 2 is a sectional view taken along line II-II of the sheet of FIG. 図１のシートのシートクッションに設けられる発熱体の一例の模式図である。It is a schematic diagram of an example of a heating element provided in the seat cushion of the seat of FIG. 図１のシートのシートバックに設けられる発熱体の一例の模式図である。It is a schematic diagram of an example of a heating element provided on the seat back of the sheet of FIG. 図１のシートのシートヒーターの一例を示すブロック図である。It is a block diagram which shows an example of the seat heater of the seat of FIG. 図５のシートヒーターの制御部による電流制御の一例のタイミングチャートである。It is a timing chart of an example of the current control by the control part of the seat heater of FIG. 図１のシートのシートクッションに設けられる発熱体の他の例の模式図である。It is a schematic diagram of another example of the heating element provided in the seat cushion of the seat of FIG. 図１のシートのシートバックに設けられる発熱体の他の例の模式図である。It is a schematic diagram of another example of the heating element provided in the seat back of the sheet of FIG. 図５のシートヒーターの制御部による電流制御のタイミングチャートである。It is a timing chart of the current control by the control part of the seat heater of FIG.

図１は、本発明の実施形態を説明するための、シートの一例の斜視図である。 FIG. 1 is a perspective view of an example of a sheet for explaining an embodiment of the present invention.

図１に示すシート１は、例えば自動車等の車両に設置されるシートであり、シートクッション２と、シートバック３とを備える。 The seat 1 shown in FIG. 1 is a seat installed in a vehicle such as an automobile, and includes a seat cushion 2 and a seat back 3.

シートクッション２は、ウレタンフォームなどの発泡材からなるクッションパッドと、クッションパッドを覆うトリムカバーとを有する。シートクッション２のトリムカバーは、吊り込みラインＬ１に沿ってクッションパッドに吊り込まれている。吊り込みラインＬ１は、シートクッション２の座面において、シート前後方向の略中央部をシート幅方向に延びて設けられている。トリムカバーが吊り込まれることにより、トリムカバーのクッションパッドに対するフィット性が高められている。 The seat cushion 2 has a cushion pad made of a foam material such as urethane foam, and a trim cover that covers the cushion pad. The trim cover of the seat cushion 2 is suspended from the cushion pad along the suspension line L1. The suspension line L1 is provided on the seat surface of the seat cushion 2 so as to extend a substantially central portion in the front-rear direction of the seat in the width direction of the seat. By suspending the trim cover, the fit of the trim cover to the cushion pad is improved.

シートクッション２は、シートクッション発熱体２０をさらに有する。シートクッション発熱体２０は、不織布などの基材に発熱線が配線されてなる面状の発熱体であり、シートクッション２の座面側において、クッションパッドとトリムカバーとの間に設置されている。 The seat cushion 2 further includes a seat cushion heating element 20. The seat cushion heating element 20 is a planar heating element in which heating wires are wired to a base material such as a non-woven fabric, and is installed between the cushion pad and the trim cover on the seat surface side of the seat cushion 2. ..

シートクッション発熱体２０は、吊り込みラインＬ１を境に区分された第１加温部２１及び第２加温部２２と、第１加温部２１及び第２加温部２２を連結している連結部２３とを含む。第１加温部２１は、概ね着座者の臀部から大腿部近位端に亘る部位に相対して配置され、第２加温部２２は、概ね着座者の大腿部遠位端に相対して配置されている。 The seat cushion heating element 20 connects the first heating section 21 and the second heating section 22 and the first heating section 21 and the second heating section 22 which are separated by the suspension line L1. Includes a connecting portion 23. The first heating portion 21 is generally arranged relative to the portion extending from the buttocks to the proximal end of the thigh of the seated person, and the second heating portion 22 is approximately relative to the distal end of the thigh of the seated person. And are arranged.

シートバック３は、クッションパッドと、クッションパッドを覆うトリムカバーとを有する。シートバック３のトリムカバーは、吊り込みラインＬ２に沿ってクッションパッドに吊り込まれている。吊り込みラインＬ２は、シートバック３の背もたれ面において、シート上下方向の略中央部をシート幅方向に延びて設けられている。 The seat back 3 has a cushion pad and a trim cover that covers the cushion pad. The trim cover of the seat back 3 is suspended from the cushion pad along the suspension line L2. The suspension line L2 is provided on the backrest surface of the seat back 3 so as to extend a substantially central portion in the vertical direction of the seat in the width direction of the seat.

シートバック３は、シートバック発熱体３０をさらに有する。シートバック発熱体３０は、不織布などの基材に発熱線が配線されてなる面状の発熱体であり、シートバック３の背もたれ面側において、クッションパッドとトリムカバーとの間に設置されている。 The seat back 3 further includes a seat back heating element 30. The seat back heating element 30 is a planar heating element in which a heating wire is wired to a base material such as a non-woven fabric, and is installed between the cushion pad and the trim cover on the backrest surface side of the seat back 3. ..

シートバック発熱体３０は、吊り込みラインＬ２を境に区分された第１加温部３１及び第２加温部３２と、第１加温部３１及び第２加温部３２を連結している連結部３３とを含む。第１加温部３１は、概ね着座者の腰部から肩甲骨下部に亘る部位に相対して配置され、第２加温部３２は、概ね着座者の肩甲骨から頸部に亘る部位に相対して配置されている。 The seat back heating element 30 connects the first heating unit 31 and the second heating unit 32, which are divided by the suspension line L2, and the first heating unit 31 and the second heating unit 32. Includes a connecting portion 33. The first heating portion 31 is generally arranged with respect to the portion extending from the lumbar region of the seated person to the lower part of the scapula, and the second heating portion 32 is generally arranged with respect to the portion extending from the shoulder blade to the neck of the seated person. Is arranged.

図２は、シートクッション２の断面を示す。 FIG. 2 shows a cross section of the seat cushion 2.

シートクッション２は、上記のとおり、クッションパッド１１と、トリムカバー１２と、クッションパッド１１とトリムカバー１２との間に設置されたシートクッション発熱体２０とを有する。 As described above, the seat cushion 2 has a cushion pad 11, a trim cover 12, and a seat cushion heating element 20 installed between the cushion pad 11 and the trim cover 12.

クッションパッド１１の座面側の表面には、図１に示した吊り込みラインＬ１に沿ってシート幅方向に延びる溝部１３が設けられており、溝部１３の底にはパッド側ワイヤ１４が配置されている。パッド側ワイヤ１４は、クッションパッド１１に固定されており、又はクッションパッド１１を支持する図示しないシートフレームに固定されている。 A groove portion 13 extending in the seat width direction along the suspension line L1 shown in FIG. 1 is provided on the surface of the cushion pad 11 on the seat surface side, and a pad side wire 14 is arranged on the bottom of the groove portion 13. ing. The pad-side wire 14 is fixed to the cushion pad 11 or is fixed to a seat frame (not shown) that supports the cushion pad 11.

トリムカバー１２の裏面において溝部１３に重なる部分には吊り袋１５が縫い付けられており、吊り袋１５にはカバー側ワイヤ１６が挿通されている。カバー側ワイヤ１６は、ホグリング１７によってパッド側ワイヤ１４と束ねられており、パッド側ワイヤ１４と束ねられることによって溝部１３に収納されている。そして、カバー側ワイヤ１６が溝部１３に収納されることにより、トリムカバー１２は溝部１３に吊り込まれている。 A hanging bag 15 is sewn on the back surface of the trim cover 12 so as to overlap the groove portion 13, and the cover side wire 16 is inserted through the hanging bag 15. The cover-side wire 16 is bundled with the pad-side wire 14 by a hog ring 17, and is housed in the groove 13 by being bundled with the pad-side wire 14. Then, the cover side wire 16 is housed in the groove portion 13, so that the trim cover 12 is suspended in the groove portion 13.

シートクッション発熱体２０の第１加温部２１及び第２加温部２２は、シート幅方向と交差する方向（シート前後方向）に溝部１３を挟んで配置されている。第１加温部２１及び第２加温部２２を連結している連結部２３は、パッド側ワイヤ１４とカバー側ワイヤ１６との間に挟み込まれており、撓められた状態で溝部１３に挿し込まれている。 The first heating portion 21 and the second heating portion 22 of the seat cushion heating element 20 are arranged so as to sandwich the groove portion 13 in a direction intersecting the seat width direction (seat front-rear direction). The connecting portion 23 connecting the first heating portion 21 and the second heating portion 22 is sandwiched between the pad side wire 14 and the cover side wire 16, and is formed in the groove portion 13 in a bent state. It is inserted.

図示は省略するが、シートバック３のクッションパッド及びトリムカバーもまた、シートクッション２のクッションパッド１１及びトリムカバー１２と同様に構成され、シートバック発熱体３０の第１加温部３１及び第２加温部３２は、シートバック３のクッションパッドに設けられた溝部をシート幅方向と交差する方向（シート上下方向）に挟んで配置される。そして、第１加温部３１及び第２加温部３２を連結している連結部３３は、撓められた状態で溝部に挿し込まれる。 Although not shown, the cushion pad and trim cover of the seat back 3 are also configured in the same manner as the cushion pad 11 and trim cover 12 of the seat cushion 2, and the first heating portion 31 and the second heating unit 31 of the seat back heating element 30 are configured. The heating portion 32 is arranged so as to sandwich the groove portion provided in the cushion pad of the seat back 3 in a direction intersecting the seat width direction (seat vertical direction). Then, the connecting portion 33 connecting the first heating portion 31 and the second heating portion 32 is inserted into the groove portion in a bent state.

図３は、シートクッション発熱体２０の一例を示し、図４はシートバック発熱体３０の一例を示す。 FIG. 3 shows an example of the seat cushion heating element 20, and FIG. 4 shows an example of the seat back heating element 30.

図３に示すシートクッション発熱体２０Ａは、基材に配線される発熱線として、第１発熱線２５と、第２発熱線２６とを有する。第１発熱線２５は、連結部２３を介して第１加温部２１及び第２加温部２２に跨って配線されており、第２発熱線２６は、第１加温部２１の一部に設定される局所加温部２４に配線されている。 The seat cushion heating element 20A shown in FIG. 3 has a first heating wire 25 and a second heating wire 26 as heating wires wired to the base material. The first heating wire 25 is wired across the first heating portion 21 and the second heating portion 22 via the connecting portion 23, and the second heating wire 26 is a part of the first heating portion 21. It is wired to the local heating unit 24 set to.

第１加温部２１は、上記のとおり、着座者の臀部から大腿部近位端に亘る部位に相対して設けられており、このうち大腿部近位端は、シートクッション２の座面に接触する部位のなかでも温感の知覚が相対的に早い部位である。局所加温部２４は、第１加温部２１のうち大腿部近位端に相対する領域に設定されている。 As described above, the first heating portion 21 is provided so as to face the portion extending from the buttocks to the proximal end of the thigh of the seated person, and the proximal end of the thigh is the seat of the seat cushion 2. Among the parts that come into contact with the surface, the feeling of warmth is relatively quick. The local heating unit 24 is set in a region of the first heating unit 21 facing the proximal end of the thigh.

第１発熱線２５の両端は一対の給電接続部２７に接続されており、給電接続部２７は、第１加温部２１において連結部２３が接続されている縁部２１ａとは反対側の縁部２１ｂ、すなわちシートクッション２の座面後端部に配置される縁部に設けられている。 Both ends of the first heating wire 25 are connected to a pair of power supply connecting portions 27, and the power feeding connecting portion 27 is an edge opposite to the edge portion 21a to which the connecting portion 23 is connected in the first heating portion 21. It is provided on the portion 21b, that is, the edge portion arranged at the rear end of the seat surface of the seat cushion 2.

そして、第１発熱線２５は、第１加温部２１から連結部２３を経て第２加温部２２に達し、第２加温部２２にて折り返され、第２加温部２２から連結部２３を経て第１加温部２１に戻り、全体としては第１加温部２１及び第２加温部２２並びに連結部２３に亘って略Ｕ字状に配線されており、局所的には第１加温部２１及び第２加温部２２の各部を蛇行しながら配線されている。ただし、本例では、第１発熱線２５は、局所加温部２４の外側を迂回して配線されている。 Then, the first heating wire 25 reaches the second heating section 22 from the first heating section 21 via the connecting section 23, is folded back at the second heating section 22, and is folded back from the second heating section 22 to the connecting section. It returns to the first heating section 21 via 23, and is wired in a substantially U shape over the first heating section 21, the second heating section 22, and the connecting section 23 as a whole, and is locally the first. 1 The heating unit 21 and the second heating unit 22 are wired while meandering. However, in this example, the first heating wire 25 is wired so as to bypass the outside of the local heating portion 24.

第２発熱線２６の両端は一対の給電接続部２８に接続されており、給電接続部２８は、第１発熱線２５の給電接続部２７と同じく、第１加温部２１の縁部２１ｂに設けられている。給電接続部２７には第１発熱線２５に電流を供給する給電線（不図示）が接続され、給電接続部２８には第２発熱線２６に電流を供給する給電線（不図示）が接続される。給電接続部２７及び給電接続部２８が一箇所に集約されていることにより、複数の給電線の取り回しが容易となる。 Both ends of the second heating wire 26 are connected to a pair of power feeding connection portions 28, and the feeding connection portion 28 is connected to the edge portion 21b of the first heating portion 21 like the power feeding connecting portion 27 of the first heating wire 25. It is provided. A feeder line (not shown) for supplying current to the first heating wire 25 is connected to the feeding connection portion 27, and a feeder line (not shown) for supplying current to the second heating wire 26 is connected to the feeding connection portion 28. Will be done. Since the power supply connection unit 27 and the power supply connection unit 28 are integrated in one place, it becomes easy to handle a plurality of power supply lines.

そして、第２発熱線２６は、全体として第１加温部２１を略Ｕ字状に配線されており、局所的には第１加温部２１内の局所加温部２４を蛇行しながら配線されている。第１加温部２１内の局所加温部２４に配線される第２発熱線２６の給電接続部２８が第１加温部２１の縁部２１ｂに設けられていることにより、第２発熱線２６は連結部２３に配線されず、したがって、連結部２３の撓みに起因して第２発熱線２６が断線することもない。さらに、連結部２３に配線される発熱線が第１発熱線２５のみとなり、連結部２３の可撓性の低下が抑制され、第１発熱線２５の断線もまた抑制される。 The second heating wire 26 is wired with the first heating portion 21 in a substantially U shape as a whole, and is locally wired while meandering the local heating portion 24 in the first heating portion 21. Has been done. The second heating wire is provided by providing the power supply connecting portion 28 of the second heating wire 26 wired to the local heating portion 24 in the first heating portion 21 at the edge portion 21b of the first heating portion 21. The 26 is not wired to the connecting portion 23, and therefore the second heating wire 26 is not disconnected due to the bending of the connecting portion 23. Further, the heating wire wired to the connecting portion 23 is only the first heating wire 25, the decrease in the flexibility of the connecting portion 23 is suppressed, and the disconnection of the first heating wire 25 is also suppressed.

図４に示すシートバック発熱体３０Ａは、基材に配線される発熱線として、第１発熱線３５と、第２発熱線３６とを有する。第１発熱線３５は、連結部３３を介して第１加温部３１及び第２加温部３２に跨って配線されており、第２発熱線３６は、第１加温部３１の一部に設定される局所加温部３４に配線されている。 The seatback heating element 30A shown in FIG. 4 has a first heating wire 35 and a second heating wire 36 as heating wires wired to the base material. The first heating wire 35 is wired across the first heating portion 31 and the second heating portion 32 via the connecting portion 33, and the second heating wire 36 is a part of the first heating portion 31. It is wired to the local heating unit 34 set to.

第１加温部３１は、上記のとおり、着座者の腰部から肩甲骨下部に亘る部位に相対して配置されており、このうち肩甲骨下部は、シートバック３の背もたれ面に接触する部位のなかでも温感の知覚が相対的に早い部位である。局所加温部３４は、第１加温部３１のうち肩甲骨下部に相対する領域に設定されている。 As described above, the first heating portion 31 is arranged relative to the portion extending from the lumbar region of the seated person to the lower part of the scapula, and the lower part of the scapula is the portion that contacts the backrest surface of the seat back 3. Above all, it is a part where the perception of warmth is relatively fast. The local heating portion 34 is set in a region of the first heating portion 31 that faces the lower part of the scapula.

第１発熱線３５の両端は一対の給電接続部３７に接続されており、給電接続部３７は、第１加温部３１において連結部３３が接続されている縁部３１ａとは反対側の縁部３１ｂ、すなわちシートバック３の背もたれ面下端部に配置される縁部に設けられている。 Both ends of the first heating wire 35 are connected to a pair of power feeding connection portions 37, and the power feeding connection portion 37 is an edge opposite to the edge portion 31a to which the connecting portion 33 is connected in the first heating portion 31. It is provided on the portion 31b, that is, the edge portion arranged at the lower end of the backrest surface of the seat back 3.

そして、第１発熱線３５は、第１加温部３１から連結部３３を経て第２加温部３２に達し、第２加温部３２にて折り返され、第２加温部３２から連結部３３を経て第１加温部３１に達し、全体としては第１加温部３１及び第２加温部３２並びに連結部３３に亘って略Ｕ字状に配線されており、局所的には第１加温部３１及び第２加温部３２の各部を蛇行しながら配線されている。ただし、本例では、第１発熱線３５は、局所加温部３４の外側を迂回して配線されている。 Then, the first heating wire 35 reaches the second heating section 32 from the first heating section 31 via the connecting section 33, is folded back at the second heating section 32, and is folded back from the second heating section 32 to the connecting section. It reaches the first heating section 31 via 33, and is wired in a substantially U shape over the first heating section 31, the second heating section 32, and the connecting section 33 as a whole, and is locally the first. Each part of the 1 heating part 31 and the 2nd heating part 32 is wired while meandering. However, in this example, the first heating wire 35 is wired so as to bypass the outside of the local heating portion 34.

第２発熱線３６の両端は一対の給電接続部３８に接続されており、給電接続部３８は、第１発熱線３５の給電接続部３７と同じく、第１加温部３１の縁部３１ｂに設けられている。給電接続部３７には第１発熱線３５に電力を供給する給電線（不図示）が接続され、給電接続部３８には第２発熱線３６に電力を供給する給電線（不図示）が接続される。給電接続部３７及び給電接続部３８が一箇所に集約されていることにより、複数の給電線の取り回しが容易となる。 Both ends of the second heating wire 36 are connected to a pair of power feeding connection portions 38, and the feeding connection portion 38 is connected to the edge portion 31b of the first heating portion 31 like the power feeding connecting portion 37 of the first heating wire 35. It is provided. A feeder line (not shown) for supplying power to the first heating wire 35 is connected to the feeding connection portion 37, and a feeder line (not shown) for supplying power to the second heating wire 36 is connected to the feeding connection portion 38. Will be done. Since the power supply connection unit 37 and the power supply connection unit 38 are integrated in one place, it becomes easy to handle a plurality of power supply lines.

そして、第２発熱線３６は、全体として第１加温部３１を略Ｕ字状に配線されており、局所的には第１加温部３１内の局所加温部３４を蛇行しながら配線されている。第１加温部３１内の局所加温部３４に配線される第２発熱線３６の給電接続部３８が第１加温部３１の縁部３１ｂに設けられていることにより、第２発熱線３６は連結部３３に配線されず、したがって、連結部３３の撓みに起因して第２発熱線３６が断線することもない。さらに、連結部３３に配線される発熱線が第１発熱線３５のみとなり、連結部３３の可撓性の低下が抑制され、第１発熱線３５の断線もまた抑制される。 The second heating wire 36 is wired in a substantially U shape as a whole for the first heating portion 31, and is locally wired while meandering the local heating portion 34 in the first heating portion 31. Has been done. The second heating wire is provided by providing the power supply connecting portion 38 of the second heating wire 36 wired to the local heating portion 34 in the first heating portion 31 at the edge portion 31b of the first heating portion 31. The 36 is not wired to the connecting portion 33, and therefore, the second heating wire 36 is not broken due to the bending of the connecting portion 33. Further, the heating wire wired to the connecting portion 33 is only the first heating wire 35, the decrease in flexibility of the connecting portion 33 is suppressed, and the disconnection of the first heating wire 35 is also suppressed.

図５は、シートクッション発熱体及びシートバック発熱体を備えるシートヒーターの一例を示す。 FIG. 5 shows an example of a seat heater including a seat cushion heating element and a seat back heating element.

シートヒーター４０は、図３に示したシートクッション発熱体２０Ａと、図４に示したシートバック発熱体３０Ａと、制御部４１と、電源部４２とを備える。制御部４１は、シートクッション発熱体２０Ａの第１発熱線２５及び第２発熱線２６に対する電流供給を制御し、シートバック発熱体３０Ａの第１発熱線３５及び第２発熱線３６に対する電流供給を制御する。電源部４２は、例えば車両に搭載されるバッテリーから給電される。 The seat heater 40 includes a seat cushion heating element 20A shown in FIG. 3, a seat back heating element 30A shown in FIG. 4, a control unit 41, and a power supply unit 42. The control unit 41 controls the current supply to the first heating wire 25 and the second heating wire 26 of the seat cushion heating element 20A, and supplies the current to the first heating wire 35 and the second heating wire 36 of the seat back heating element 30A. Control. The power supply unit 42 is supplied with power from, for example, a battery mounted on a vehicle.

制御部４１は、スイッチ素子４３ａ〜４３ｄを含む。スイッチ素子４３ａ〜４３ｄは、シートクッション発熱体２０Ａの第１発熱線２５及び第２発熱線２６、並びにシートバック発熱体３０Ａの第１発熱線３５及び第２発熱線３６の発熱線毎に設けられている。制御部４１は、これらのスイッチ素子４３ａ〜４３ｄを用い、第１発熱線２５及び第２発熱線２６並びに第１発熱線３５及び第２発熱線３６に対する電流供給を発熱線毎に制御可能に構成されている。制御方法としては、例えばパルス幅変調等が用いられる。 The control unit 41 includes switch elements 43a to 43d. The switch elements 43a to 43d are provided for each of the first heating wire 25 and the second heating wire 26 of the seat cushion heating element 20A, and the heating wire 35 and the second heating wire 36 of the seat back heating element 30A. ing. Using these switch elements 43a to 43d, the control unit 41 is configured to be able to control the current supply to the first heating wire 25 and the second heating wire 26 and the first heating wire 35 and the second heating wire 36 for each heating line. Has been done. As the control method, for example, pulse width modulation or the like is used.

図６は、シートクッション発熱体２０Ａの第１発熱線２５及び第２発熱線２６に対する電流供給制御の一例を示す。 FIG. 6 shows an example of current supply control for the first heating wire 25 and the second heating wire 26 of the seat cushion heating element 20A.

図６に示す例は、シートヒーター４０の作動開始直後は局所加温部２４のみ昇温させ、その後、局所加温部２４の温度を維持し、且つ局所加温部２４を除く第１加温部２１及び第２加温部２２を昇温させ、シートクッション２の座面の全体を略均一な温度に加温するものである。 In the example shown in FIG. 6, immediately after the start of operation of the seat heater 40, only the local heating unit 24 is heated, and then the temperature of the local heating unit 24 is maintained, and the first heating excluding the local heating unit 24 is performed. The temperature of the portion 21 and the second heating portion 22 is raised, and the entire seat surface of the seat cushion 2 is heated to a substantially uniform temperature.

まず、シートヒーター４０の制御部４１は、作動開始（Ｔ１）から所定タイミング（Ｔ２）到来までの起動時（Ｔ１〜Ｔ２）には、第２発熱線２６にのみ電流を供給し、第２発熱線２６を発熱させる。第２発熱線２６の発熱によって局所加温部２４が昇温される。 First, the control unit 41 of the seat heater 40 supplies a current only to the second heating wire 26 at the time of starting (T1 to T2) from the start of operation (T1) to the arrival of the predetermined timing (T2) to generate the second heat. The wire 26 is heated. The temperature of the local heating unit 24 is raised by the heat generated by the second heating wire 26.

起動時（Ｔ１〜Ｔ２）に第２発熱線２６に供給される電流量（Ａ１）は、例えばシートヒーター４０に許容される消費電流の上限に相当する電流量とすることができる。 The amount of current (A1) supplied to the second heating wire 26 at the time of startup (T1 to T2) can be, for example, an amount of current corresponding to the upper limit of the current consumption allowed for the seat heater 40.

なお、所定タイミング（Ｔ２）は、作動開始（Ｔ１）から所定の時間が経過したタイミングであってもよく、局所加温部２４に温度センサーが設けられ、この温度センサーによって検出される温度が所定の温度に達したタイミングであってもよい。 The predetermined timing (T2) may be a timing when a predetermined time has elapsed from the start of operation (T1), and a temperature sensor is provided in the local heating unit 24, and the temperature detected by the temperature sensor is predetermined. It may be the timing when the temperature of is reached.

本例では、第１発熱線２５が局所加温部２４を迂回して配線されていることから、制御部４１は、所定タイミング（Ｔ２）が到来した後の定常時（Ｔ２〜Ｔ３）には、第１発熱線２５及び第２発熱線２６に電流を供給し、第１発熱線２５及び第２発熱線２６を発熱させる。第２発熱線２６の発熱によって局所加温部２４の温度が維持され、第１発熱線２５の発熱によって、局所加温部２４を除く第１加温部２１及び第２加温部２２が局所加温部２４と同じ温度まで昇温される。 In this example, since the first heating wire 25 is wired so as to bypass the local heating unit 24, the control unit 41 is in the steady state (T2 to T3) after the predetermined timing (T2) has arrived. , A current is supplied to the first heating wire 25 and the second heating wire 26 to heat the first heating wire 25 and the second heating wire 26. The temperature of the local heating unit 24 is maintained by the heat generated by the second heating wire 26, and the heat generated by the first heating wire 25 causes the first heating unit 21 and the second heating unit 22 excluding the local heating unit 24 to localize. The temperature is raised to the same temperature as the heating unit 24.

定常時（Ｔ２〜Ｔ３）に第２発熱線２６に供給される電流量（Ａ２）は、起動時（Ｔ１〜Ｔ２）に第２発熱線２６に供給される電流量（Ａ１）より小さく、定常時（Ｔ２〜Ｔ３）に第１発熱線２５に供給される電流量（Ａ３）及び第２発熱線２６に供給される電流量（Ａ２）の合計の電流量（Ａ２＋Ａ３）は、起動時（Ｔ１〜Ｔ２）に第２発熱線２６に供給される電流量（Ａ１）以下、すなわちシートヒーター４０に許容される消費電流の上限に相当する電流量以下である。 The amount of current (A2) supplied to the second heating wire 26 at regular times (T2 to T3) is smaller than the amount of current (A1) supplied to the second heating wire 26 at startup (T1 to T2). The total current amount (A2 + A3) of the current amount (A3) supplied to the first heating wire 25 and the current amount (A2) supplied to the second heating wire 26 at all times (T2 to T3) is determined at startup (T1). ~ T2) is the amount of current (A1) or less supplied to the second heating wire 26, that is, the amount of current corresponding to the upper limit of the current consumption allowed for the seat heater 40.

このように、起動時（Ｔ１〜Ｔ２）に、第２発熱線２６にのみ電流を供給することにより、シートヒーター４０に許容される消費電流の上限に相当する電流量（Ａ１）を第２発熱線２６に供給でき、局所加温部２４を急速に昇温させることができる。局所加温部２４は、温感の知覚が相対的に早い大腿部近位端に相対する領域に設定されており、起動時（Ｔ１〜Ｔ２）に、局所加温部２４を急速に昇温させることによって快適感を早期に向上させることができ、局所加温部２４を含む第１加温部２１及び第２加温部２２全体を同じ速度で昇温させる場合に要する電流量に比べて消費電流を抑制することができる。 In this way, by supplying the current only to the second heating wire 26 at the time of startup (T1 to T2), the second heat generation (A1) corresponds to the upper limit of the current consumption allowed for the seat heater 40. It can be supplied to the wire 26, and the temperature of the local heating unit 24 can be rapidly raised. The local heating unit 24 is set in a region facing the proximal end of the thigh, where the perception of warmth is relatively fast, and the local heating unit 24 rapidly rises at the time of activation (T1 to T2). By warming, the feeling of comfort can be improved at an early stage, and compared with the amount of current required to raise the temperature of the entire first heating unit 21 and the second heating unit 22 including the local heating unit 24 at the same speed. The current consumption can be suppressed.

局所加温部２４を急速に昇温させる観点から、局所加温部２４における第２発熱線２６の配線密度を、局所加温部２４を除く第１加温部２１及び第２加温部２２における第１発熱線２５の配線密度よりも大きくすることが好ましい。 From the viewpoint of rapidly raising the temperature of the local heating unit 24, the wiring density of the second heating wire 26 in the local heating unit 24 is adjusted to the first heating unit 21 and the second heating unit 22 excluding the local heating unit 24. It is preferable to make it larger than the wiring density of the first heating wire 25 in.

シートバック発熱体３０Ａの第１発熱線３５及び第２発熱線３６に対する電流供給もまた、シートクッション発熱体２０Ａの第１発熱線２５及び第２発熱線２６に対する電流供給と同様に制御される。 The current supply to the first heating wire 35 and the second heating wire 36 of the seat back heating element 30A is also controlled in the same manner as the current supply to the first heating wire 25 and the second heating wire 26 of the seat cushion heating element 20A.

なお、シートクッション発熱体２０Ａの第１発熱線２５及び第２発熱線２６に対する電流供給制御は、上記の例に限定されるものではない。例えば、上記の電流供給制御では、定常時（Ｔ２〜Ｔ３）に、局所加温部２４の温度と、局所加温部２４を除く第１加温部２１及び第２加温部２２の温度とを等しくするものとして説明したが、局所加温部２４の温度と、局所加温部２４を除く第１加温部２１及び第２加温部２２の温度とを互いに異ならせてもよい。シートクッション発熱体２０Ａでは、第１発熱線２５が局所加温部２４を迂回して配線されており、局所加温部２４の温度と、局所加温部２４を除く第１加温部２１及び第２加温部２２の温度とを互いに独立に設定できる。すなわち、局所加温部２４の温度を相対的に低くすることもでき、相対的に高くすることもできる。 The current supply control for the first heating wire 25 and the second heating wire 26 of the seat cushion heating element 20A is not limited to the above example. For example, in the above current supply control, the temperature of the local heating unit 24 and the temperatures of the first heating unit 21 and the second heating unit 22 excluding the local heating unit 24 are used in the steady state (T2 to T3). However, the temperature of the local heating unit 24 and the temperatures of the first heating unit 21 and the second heating unit 22 excluding the local heating unit 24 may be different from each other. In the seat cushion heating element 20A, the first heating wire 25 is wired so as to bypass the local heating section 24, and the temperature of the local heating section 24 and the first heating section 21 excluding the local heating section 24 and The temperature of the second heating unit 22 can be set independently of each other. That is, the temperature of the local heating unit 24 can be relatively low or relatively high.

図７は、シートクッション発熱体２０の他の例を示し、図８はシートバック発熱体３０の他の例を示す。 FIG. 7 shows another example of the seat cushion heating element 20, and FIG. 8 shows another example of the seat back heating element 30.

図７に示すシートクッション発熱体２０Ｂは、第１発熱線２５が第２発熱線２６と並行して局所加温部２４にも配線されている点で、図３に示したシートクッション発熱体２０Ａと相違し、その他の点はシートクッション発熱体２０Ａと同一である。第１発熱線２５が第２発熱線２６と並行して局所加温部２４にも配線されていることから、局所加温部２４は、第１発熱線２５の発熱によっても昇温され、第２発熱線２６の発熱によっても昇温される。 The seat cushion heating element 20B shown in FIG. 7 has the seat cushion heating element 20A shown in FIG. 3 in that the first heating wire 25 is also wired to the local heating unit 24 in parallel with the second heating wire 26. In other respects, it is the same as the seat cushion heating element 20A. Since the first heating wire 25 is also wired to the local heating portion 24 in parallel with the second heating wire 26, the temperature of the local heating portion 24 is also raised by the heat generated by the first heating wire 25, and the temperature is raised. 2 The temperature is also raised by the heat generated by the heating wire 26.

図８に示すシートバック発熱体３０Ｂは、第１発熱線３５が第２発熱線３６と並行して局所加温部３４にも配線されている点で、図４に示したシートバック発熱体３０Ａと相違しており、局所加温部３４は、第１発熱線３５の発熱によっても昇温され、第２発熱線３６の発熱によっても昇温される。 In the seatback heating element 30B shown in FIG. 8, the first heating wire 35 is wired to the local heating unit 34 in parallel with the second heating wire 36, and the seatback heating element 30A shown in FIG. 4 The temperature of the local heating unit 34 is also raised by the heat generated by the first heating wire 35, and is also raised by the heat generated by the second heating wire 36.

図９は、図５に示したシートヒーター４０のシートクッション発熱体２０Ａ及びシートバック発熱体３０Ａをシートクッション発熱体２０Ｂ及びシートバック発熱体３０Ｂに替えた場合における、シートクッション発熱体２０Ｂの第１発熱線２５及び第２発熱線２６に対する電流供給制御の一例を示す。 FIG. 9 shows the first seat cushion heating element 20B when the seat cushion heating element 20A and the seat back heating element 30A of the seat heater 40 shown in FIG. 5 are replaced with the seat cushion heating element 20B and the seat back heating element 30B. An example of current supply control for the heating wire 25 and the second heating wire 26 is shown.

図９に示す例は、シートヒーター４０の作動開始直後は局所加温部２４のみ昇温させ、その後、局所加温部２４の温度を維持し、且つ局所加温部２４を除く第１加温部２１及び第２加温部２２を昇温させ、シートクッション２の座面の全体を略均一な温度に加温するものである。 In the example shown in FIG. 9, immediately after the start of operation of the seat heater 40, only the local heating unit 24 is heated, and then the temperature of the local heating unit 24 is maintained, and the first heating excluding the local heating unit 24 is performed. The temperature of the portion 21 and the second heating portion 22 is raised, and the entire seat surface of the seat cushion 2 is heated to a substantially uniform temperature.

本例では、第１発熱線２５が第２発熱線３６と並行して局所加温部３４にも配線されていることから、制御部４１は、所定タイミング（Ｔ２）が到来した後の定常時（Ｔ２〜Ｔ３）には、第２発熱線２６に対する電流供給を遮断し、第１発熱線２５にのみ電流を供給し、第１発熱線２５を発熱させる。第１発熱線２５の発熱によって、局所加温部２４の温度は維持され、局所加温部２４を除く第１加温部２１及び第２加温部２２が局所加温部２４と同じ温度まで昇温される。 In this example, since the first heating wire 25 is also wired to the local heating unit 34 in parallel with the second heating wire 36, the control unit 41 is in a steady state after the predetermined timing (T2) has arrived. In (T2 to T3), the current supply to the second heating wire 26 is cut off, the current is supplied only to the first heating wire 25, and the first heating wire 25 is heated. The temperature of the local heating unit 24 is maintained by the heat generated by the first heating wire 25, and the first heating unit 21 and the second heating unit 22 excluding the local heating unit 24 reach the same temperature as the local heating unit 24. The temperature is raised.

定常時（Ｔ２〜Ｔ３）に第１発熱線２５に供給される電流量（Ａ４）は、起動時（Ｔ１〜Ｔ２）に第２発熱線２６に供給される電流量（Ａ１）以下、すなわちシートヒーター４０に許容される消費電流の上限に相当する電流量以下である。 The amount of current (A4) supplied to the first heating wire 25 at regular times (T2 to T3) is equal to or less than the amount of current (A1) supplied to the second heating wire 26 at startup (T1 to T2), that is, the sheet. It is not more than the amount of current corresponding to the upper limit of the current consumption allowed for the heater 40.

さらに、本例では、第１発熱線２５の発熱によって、局所加温部２４を含む第１加温部２１及び第２加温部２２の全体を昇温させることができるので、定常時（Ｔ２〜Ｔ３）には第１発熱線２５にのみ電流を供給してシートクッション２の座面の全体を略均一な温度に加温することができ、電流供給制御が簡潔となる。 Further, in this example, the heat generated by the first heating wire 25 can raise the temperature of the entire first heating unit 21 and the second heating unit 22 including the local heating unit 24, so that the temperature can be raised in the steady state (T2). To T3), a current can be supplied only to the first heating wire 25 to heat the entire seat surface of the seat cushion 2 to a substantially uniform temperature, and the current supply control becomes simple.

シートバック発熱体３０Ｂの第１発熱線３５及び第２発熱線３６に対する電流供給もまた、シートクッション発熱体２０Ｂの第１発熱線２５及び第２発熱線２６に対する電流供給と同様に制御される。 The current supply to the first heating wire 35 and the second heating wire 36 of the seat back heating element 30B is also controlled in the same manner as the current supply to the first heating wire 25 and the second heating wire 26 of the seat cushion heating element 20B.

なお、シートクッション発熱体２０Ｂの第１発熱線２５及び第２発熱線２６に対する電流供給制御は、上記の例に限定されるものではない。例えば、起動時（Ｔ１〜Ｔ２）に第１発熱線２５及び第２発熱線２６に供給される合計の電流量が、起動時（Ｔ１〜Ｔ２）に第２発熱線２６に供給される電流量以下、すなわちシートヒーター４０に許容される消費電流の上限に相当する電流量以下となる範囲で、定常時（Ｔ２〜Ｔ３）に第１発熱線２５及び第２発熱線２６に電流を供給し、局所加温部２４の温度を相対的に高くしてもよい。 The current supply control for the first heating wire 25 and the second heating wire 26 of the seat cushion heating element 20B is not limited to the above example. For example, the total amount of current supplied to the first heating wire 25 and the second heating wire 26 at startup (T1 to T2) is the amount of current supplied to the second heating wire 26 at startup (T1 to T2). In the following, that is, within the range of the amount of current corresponding to the upper limit of the current consumption allowed for the seat heater 40 or less, the current is supplied to the first heating wire 25 and the second heating wire 26 in the steady state (T2 to T3). The temperature of the local heating unit 24 may be relatively high.

以上、自動車等の車両に設置されるシート１を例にして本発明を説明したが、本発明は、船舶や航空機といった車両以外の乗物用のシートにも適用可能であり、家具用のシートにも適用可能である。 Although the present invention has been described above by taking the seat 1 installed in a vehicle such as an automobile as an example, the present invention can also be applied to a seat for a vehicle other than a vehicle such as a ship or an aircraft, and can be used as a seat for furniture. Is also applicable.

１シート
２シートクッション
３シートバック
１１クッションパッド
１２トリムカバー
１３溝部
１４パッド側ワイヤ
１５吊り袋
１６カバー側ワイヤ
１７ホグリング
２０，２０Ａ，２０Ｂシートクッション発熱体
２１第１加温部
２１ａ，２１ｂ縁部
２２第２加温部
２３連結部
２４局所加温部
２５第１発熱線
２６第２発熱線
２７給電接続部
２８給電接続部
３０，３０Ａ，３０Ｂシートバック発熱体
３１第１加温部
３１ａ，３１ｂ縁部
３２第２加温部
３３連結部
３４局所加温部
３５第１発熱線
３６第２発熱線
３７給電接続部
３８給電接続部
４０シートヒーター
４１制御部
４２電源部
４３ａ〜４３ｄスイッチ素子
Ｌ１，Ｌ２吊り込みライン 1 Seat 2 Seat Cushion 3 Seat Back 11 Cushion Pad 12 Trim Cover 13 Groove 14 Pad Side Wire 15 Hanging Bag 16 Cover Side Wire 17 Hog Ring 20, 20A, 20B Seat Cushion Heating Element 21 First Heating Elements 21a, 21b Edges 22 2nd heating unit 23 Connecting unit 24 Local heating unit 25 1st heating wire 26 2nd heating wire 27 Power supply connection unit 28 Power supply connection unit 30, 30A, 30B Seat back heating element 31 1st heating unit 31a, 31b edge Part 32 Second heating part 33 Connecting part 34 Local heating part 35 First heating wire 36 Second heating wire 37 Power supply connection part 38 Power supply connection part 40 Seat heater 41 Control part 42 Power supply part 43a to 43d Switch elements L1, L2 Hanging line

Claims

A heating element for a seat heater installed between a cushion pad having a groove extending in the seat width direction on the surface and a trim cover covering the cushion pad while being suspended in the groove.
A first heating portion and a second heating portion arranged with the groove portion sandwiched in a direction intersecting the seat width direction on the surface of the cushion pad.
A connecting portion that connects the first heating portion and the second heating portion and is inserted into the groove portion,
A local heating unit set as a part of the first heating unit and
With
A first heating wire that is wired across the first heating portion and the second heating portion via the connecting portion, and
The second heating wire wired to the local heating part and
Including
The power supply connection portions of the first heating wire and the second heating wire are provided at the edges of the first heating portion excluding the edge to which the connecting portion is connected in the first heating portion .
Only the first heating wire is wired to the connecting portion.
A heating element for a seat heater configured so that the current supply to the first heating wire and the second heating wire can be controlled for each heating wire .

The heating element for a seat heater according to claim 1.
The first heating wire is a heating element for a seat heater that is wired so as to bypass the local heating portion.

The heating element for a seat heater according to claim 2.
The wiring density of the second heating wire in the local heating section is higher than the wiring density of the first heating wire in the first heating section and the second heating section excluding the local heating section. body.

The heating element for a seat heater according to claim 1.
The first heating wire is a heating element for a seat heater that is wired to the local heating unit in parallel with the second heating wire.

The heating element for a seat heater according to any one of claims 1 to 4,
A control unit that controls the current supplied to the first heating wire and the second heating wire of the heat generating body for the seat heater.
With
The control unit
At the time of start-up from the start of operation to the arrival of a predetermined timing, the current supply control is performed only for the second heating wire.
In the steady state after the arrival of the predetermined timing, current supply control is performed for the first heating wire and the second heating wire.
A seat heater in which the total amount of current supplied to the first heating wire and the second heating wire in the steady state is equal to or less than the amount of current supplied to the second heating wire at the time of startup.

A cushion pad with a groove extending in the seat width direction on the surface,
A trim cover that covers the cushion pad while being suspended in the groove,
The seat heater according to claim 5 and
With
The first heating portion and the second heating portion of the seat heater heating element of the seat heater are arranged on the surface of the cushion pad in a direction intersecting the seat width direction with the groove portion interposed therebetween, and the seat heater. The connecting portion of the heating element is a sheet inserted into the groove portion.