JP5752450B2 - Seat with seat heater - Google Patents

Description

  The present invention relates to a seat on which a seat heater that can be suitably used, for example, for a vehicle is disposed, and more particularly to a seat that can prevent disconnection of a heater wire and has good heating efficiency.

  Conventionally, as a seat heater to be mounted on a vehicle seat or the like, for example, a cord-like heater having a heat-sealing layer on a base material as described in Patent Document 1 is meandered, and heat generated by heating and pressurization. A structure in which a base material and a heat fusion layer are bonded and fixed by fusion is known. In recent years, with regard to the warming of seats, heater wires are arranged on the side support portions raised and formed on both the left and right sides of the seat center portion as described in Patent Document 2, for example, in response to the demand for higher comfort. The seat which also installs and heats a side support part has come to be seen. Further, as a technique related to the present invention, for example, Patent Document 3 is cited.

Japanese Patent No. 4202071: Clave Japanese Patent No. 3928419: Matsushita Electric Industrial Co., Ltd. JP 2009-153650 A: Matsushita Electric Industrial Co., Ltd.

  Here, the following problems have been clarified regarding a sheet in which a heater wire is wired to the side support portion of the sheet as in Patent Document 2. First of all, since the side support part is formed so as to be higher than the seat center part, when the occupant gets into the automobile, there are many cases where the side support part slides into the seat center part while crushing the side support part with the butt. Similarly, when getting off the car, there are many cases where the body is rotated 90 degrees around the hip while the side support portion is crushed and the foot is stepped on. In such a case, since a large load is applied to the heater wire, there is a possibility that the heater wire may be disconnected due to repeated boarding / alighting. Secondly, since the portion where the occupant touches the side support portion is substantially limited to a specific portion, it is very uneconomical to heat the entire side support portion.

  The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a sheet that can prevent the breakage of the heater wire and has good heating efficiency.

In order to achieve the above object, a seat according to the present invention includes a seat center portion and side support portions formed so as to be raised on the left and right sides of the seat center portion, and at least a seat heater having a heater wire is disposed on the side support portion. In the seat, the heater wire of the seat heater is disposed only on the seat center portion side with respect to the ridge line of the side support portion , and the seat heater is disposed on the substrate and the substrate. The heater wire is disposed so as not to exceed the center line in the left-right direction of the base material of the portion disposed in the side support portion, and the heater wire is disposed in the seat center portion. It is arrange | positioned so that it may be located in the side .

When the side support portion of the seat receives a load due to the passenger getting on and off, the side support portion is deformed so as to be crushed around the top. In accordance with this deformation, the seat heater disposed on the seat also receives a bending stress with the portion located at the top as a fulcrum. For this reason, the disconnection of the heater wire frequently occurs at the portion located at the top of the side support portion. Therefore, the heater wire can be prevented from being disconnected by disposing the heater wire so as not to exceed the ridge line that is a continuous line at the top of the side support portion. Further, the portion where the occupant touches the side support portion is substantially only on the seat center portion side of the ridge line. Therefore, by arranging the heater wire only in this portion, it is possible to efficiently heat the extra portion without generating heat.
Also, when using a seat heater with a heater wire on the base material, a difference in level occurs between where the seat heater exists and where the seat heater does not exist, and the occupant feels uncomfortable. It will be arranged on almost the entire surface of the sheet. At that time, if the heater wire is arranged so as not to exceed the center line in the left-right direction of the base material, and if the heater wire is arranged so as to be positioned on the seat center side, there is no step. In this state, disconnection can be prevented and efficient heating can be performed.

It is a figure which shows embodiment by this invention, and is a perspective view which notches and shows a vehicle seat by which the seat heater is arrange | positioned. It is a figure which shows embodiment by this invention, and is sectional drawing which partially cuts and shows the seat surface of the vehicle seat by which the seat heater is arrange | positioned. It is a figure which shows embodiment by this invention, and is III-III 'sectional drawing in FIG. It is a figure which shows embodiment by this invention, and is a top view which shows the structure of a seat heater. It is a figure which shows other embodiment by this invention, and is a top view which shows the structure of a seat heater. It is a figure which shows the form of a comparison, and is sectional drawing which partially cuts and shows the seat surface of the vehicle seat by which the seat heater is arrange | positioned. It is a figure which shows the form of a comparison, and is VII-VII 'sectional drawing in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 4. These embodiments show examples assuming that the present invention is applied to a vehicle seat.

  As shown in FIG. 4, the seat heater used in the present embodiment is configured. On the base material 5 which consists of a nonwoven fabric, the heater wire 3 which has resistance wires, such as a copper alloy wire and a Ni-Cr wire, is arrange | positioned by the predetermined pattern shape. As the base material 5, various materials such as a woven fabric, a foamed resin sheet, and a foamed rubber sheet can be used in addition to the nonwoven fabric. Depending on the situation, the heater wire 3 may be provided directly on the sheet. There is also no limitation on the heater wire 3, for example, a resistance wire is wound horizontally around the central core, a highly insulated resistance wire with individual insulation is wound horizontally or aligned, a combination with a temperature detection wire, etc. Can be used. When fixing the heater wire 3 on the base material 5, it may be heat-sealed by a heat-sealing material formed on the heater wire 3 or the base material 5, or may be sewn, or by other methods. Also good.

  When the heater wire 3 is disposed, as shown in FIGS. 1 to 3, when the seat heater 1 is disposed on the vehicle seat 11, the heater wire 3 is disposed only on the seat center portion 13 side with respect to the ridge line R of the side support portion 15. It is necessary to make it. As one aspect of this, in the present embodiment, the heater wire 3 is disposed so as not to exceed the center line C in the left-right direction of the base material 5, and the heater wire 3 is disposed on the sheet center portion 13 side. It arrange | positions so that it may be located in. When the seat heater 1 in which the heater wire 3 is disposed on the base material 5 is used, a difference in level occurs between where the seat heater 1 exists and where the seat heater 1 does not exist, so that the occupant feels uncomfortable. The heater 1 is disposed on almost the entire surface of the sheet 11. At this time, if the heater wire 3 is provided as in the present embodiment, the step can be eliminated, disconnection can be prevented, and efficient heating can be achieved. The configuration “the heater wire 3 is arranged so as not to cross the center line in the left-right direction of the base material 5” is a configuration obtained by the inventor of the present invention repeatedly conducting experiments on a critical point where disconnection does not occur. In the present embodiment, the seat heater 1 disposed in the side support portion 15 of the seat 11 and the seat heater 1 ′ disposed in the seat center portion 13 of the seat 11 are configured to be continuous. 5 is the reference of the seat heater 1 arranged in the side support portion 15 and not the reference of the seat heater 1 ′ arranged in the seat center portion 13. A seat heater 1 ′ may be appropriately disposed in the seat center portion 13 as necessary, and a seat heater may not be disposed. Further, regarding the arrangement of the heater wire 3 ′ in the seat heater 1 ′ disposed in the sheet center portion 13, it may be appropriately arranged in an arbitrary pattern shape, and the shape of the base material 5 ′ is also arbitrary. The “left-right direction” is the left-right direction for a passenger seated in a normal posture. However, when the swell angle of the side support portion 15 is close to vertical, the seat heater 1 disposed on the seat 11 may be the vertical direction of the occupant seated in a normal posture, but the left and right considered in the situation where the seat support 1 is disposed on a plane. It can be seen as a direction.

  And the seat heater 1 which comprises the said structure will be arrange | positioned in the vehicle seat 11 in the state as shown in FIG. The vehicle seat 11 includes a seat surface 21 and a back surface 23, each of which includes a seat center portion 13 and side support portions 15 formed so as to be raised on both the left and right sides thereof, and the surface of the pad 17 is covered with a skin cover 19. It has become. The seat heater 1 is attached to the pad 17 or the skin cover 19. In the present embodiment, the seat heater 1 is disposed on both the seating surface 21 and the back surface 23, but a configuration in which only the seat heater 1 is disposed is also conceivable.

  In the above embodiment, as shown in FIG. 4, the heater wires are arranged in a meandering shape. However, for example, as shown in FIG. Also, the folded portion of the heater wire may be, for example, a substantially semicircular curve as shown in FIG. 4, a V-shaped acute angle as shown in FIG. 5, or other shapes. Anyway. Various pattern shapes are possible.

  About the sheet | seat 11 by embodiment shown to the said FIGS. 2-4, the boarding / alighting pressure test and the local pressure test were done. The getting-on / off pressurization test is an endurance test that reproduces getting on and off the car. As a specific method, the flat plate is inclined 30 degrees with respect to the surface of the seat center portion 13 with the ridgeline R of the side support portion 15 as an axis, and in this state, the flat plate is pressed 10000 times at 784N on the side support portion 15 and thereafter The state of the seat heater 1 was confirmed. The local pressure test is an endurance test that reproduces the pressing by the knee. As a specific method, a spherical portion of a metal hemisphere having a diameter of 165 mm was pressed 10,000 times against the side support portion 15 at 686 N, and the state of the seat heater 1 thereafter was confirmed. In combination with the embodiment, as shown in FIG. 6 and FIG. 7, the heater wire 3 of the seat heater 1 is disposed over the ridge line R of the side support portion 15 as a comparative form, and a boarding / exiting pressure test A local pressure test was conducted.

  According to the above test, no breakage occurred in the heater wire 3 in the sheet 11 according to the present embodiment, and no damage was seen in appearance. On the other hand, for the sheet 11 according to the comparative example, the heater wire 3 did not break, but in any test, the heater wire 3 was folded at a position corresponding to the vicinity of the ridge line R. It was confirmed that 3 had a strong load.

  As described above in detail, according to the present invention, the heater wire can be prevented from being disconnected, and a sheet with good heating efficiency can be obtained. This seat can be used, for example, for automobiles, motorcycles, railway vehicles, etc., for boats, airplanes, etc., for amusement park ferris wheels, for various stadiums, for theaters, movie theaters, etc. It can be suitably used in various applications such as a sheet, a sofa used in a home or office, a barber shop sheet, and a medical sheet used in various medical institutions.

DESCRIPTION OF SYMBOLS 1 Sheet heater 3 Heater wire 5 Base material 11 Sheet 13 Sheet center part 15 Side support part R Edge line C Center line

Claims (1)

A seat center portion and a side support portion formed to be raised on both the left and right sides of the seat center portion, and at least a seat heater having a heater wire in the side support portion is disposed,
While the heater wire of the seat heater is disposed only on the seat center side than the ridgeline of the side support portion ,
The seat heater is composed of a base material and a heater wire disposed on the base material, and the heater wire does not exceed the center line in the left-right direction of the base material of the portion disposed in the side support portion. A sheet, wherein the heater wire is disposed so as to be positioned on the sheet center portion side .

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