JPH06323562A - Plate-type warmer - Google Patents

Abstract

PURPOSE:To make a small and thin junction box, which is provided at a connection between a plate-type warmer and an electric cable. CONSTITUTION:A plate-type warmer is provided with a plate-type warmer part 1, an electric cable 3 to be connected to the plate-type warmer part 1 and a junction box 2 located at the connecting part between the plate-type warmer part 1 and the electric cable 3. A sheet-type connector 13 having a high-tensile strength is attached to the warmer part 1 and bites into the junction box 2 to connect the warmer part 1 and the junction box together via the connector 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet heating device having a sheet heating unit provided with a relay box for connection with an electric cable.

[0002]

2. Description of the Related Art Conventionally, a planar heating tool for an electric carpet or the like disclosed in Japanese Patent Laid-Open No. 2-178534 has a relay box (control box) for connecting with an electric cable such as a power cord. The relay box 2 is fixed in a state where it is placed in a corner portion of the relay box 2 and a part of the planar heating portion 1 is bitten between the upper and lower cases of the relay box 2 as shown in FIG. 6, for example.

[0003] Further, there is a relay box in which an electrical board for controlling energization of the sheet heating section is housed and arranged. In such a box, the connecting portion between the sheet heating section and the relay box is arranged. The electrical equipment board is arranged separately.

[0004]

However, in the conventional sheet heating device for fixing the relay box by engaging the sheet heating portion as described above, the thickness of the relay box portion is equal to the thickness of the sheet heating portion. Since it is thicker than the plate thickness of the relay box added, a step is generated at the connecting portion between the planar heating part and the relay box. As a result, there is a risk that a user who walks on the surface heating tool will trip over the relay box and fall, and the appearance will also be uncomfortable.

Further, when the electrical equipment substrate is housed in the relay box, conventionally, since the bite portion of the heating portion and the electrical equipment substrate are arranged at different positions, the relay box becomes wider in plan and the relay box. Was an obstacle and wasted space.

In view of the above points, the present invention has an object to reduce the thickness or size of the relay box.

[0007]

A first aspect of the present invention is a surface provided with a sheet heating section, an electric cable connected to the sheet heating section, and a relay box provided at a connecting portion between the sheet heating section and the electric cable. In the sheet heating device, a sheet-like connecting tool having high tensile strength is fixed to the sheet heating unit, and the connecting box is engaged with the sheet connecting unit to connect the sheet heating unit to the box. It is a thing.

According to a second aspect of the present invention, in the first aspect, a part of the relay box is extended to the planar heating section side so as to cover the electric cable located between the relay box and the planar heating section. It is what

A third aspect of the present invention is a sheet heating unit, an electric cable connected to the sheet heating unit, a relay box provided at a connecting portion between the sheet heating unit and the electric cable, and a relay box arranged in the relay box. The electrical box is provided, and the relay box and the planar heating part are fixed to each other by engaging the connection tool fixed to the planar heating part with the relay box, or by using a part of the planar heating part with the relay box. In a planar warming tool for directly biting, a part of the electrical equipment substrate is superposed on the connector or the planar warming section located in the relay box and bitten by the relay box. It is arranged.

[0010]

According to the first aspect of the invention, the sheet-like connecting member having a high tensile strength is fixed to the planar heating unit, and the connecting unit is engaged with the relay box to connect the planar heating unit and the relay box. Thus, the relay box only needs to bite into the sheet-like connector, and the thickness thereof can be made smaller than that in the case of biting into the thick planar heating portion.

According to the second aspect of the invention, a part of the relay box covers the electric cable located between the relay box and the planar heating section, thereby preventing the electric cable from being exposed.

According to the third aspect of the present invention, a part of the electrical equipment substrate is placed on top of or below the sheet-like connecting device or the sheet-like heating portion that is bitten by the relay box and located inside the relay box. By this, parts can be arranged on the surface of the sheet-like connector, or on the opposite surface of the electrical equipment substrate that is in contact with the planar heating part, and electronic parts can be efficiently arranged inside the relay box. Can be reduced in a plane.

[0013]

1 is a plan view of an essential portion of an electric carpet showing an example of the surface heating tool of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is taken along line BB of FIG. FIG. The electric carpet main body is mainly composed of a wide area sheet heating unit 1, a relay box 2 arranged at a corner thereof, and an electric cable 3 connected to the relay box.

The sheet heating section 1 is constructed by arranging heating wires 6 and 6 and temperature detection wires 7 and 7 between a skin material 4 and a heat insulating material 5. The relay box 2 is configured by fitting an upper case 8 and a lower case 9 that are divided into upper and lower parts and then fixing them with screws, and an electric board 10 connected to the electric cable 3 is housed in the internal space. On the upper surface of the relay box 2, a power switch 11 and temperature control switches 12 and 12 are desired. The electric component board 10 includes the heating wires 6 and 6 and the temperature detection wires 7 and 7.
The temperature of the heating wires 6 and 6 is controlled based on the temperature data detected by the temperature detection wires 7 and 7 to control the surface of the planar warming portion 1 to the temperature desired by the user.

The sheet heating unit 1 and the relay box 2 are connected to each other via a sheet-like connector 13 which is thinner than the sheet heating unit 1 and has a high tensile strength such as a nonwoven fabric. In detail, after sandwiching the surface heating part 1 side of the connecting tool 13 between the body skin 4 and the heat insulating material 5, they are bonded with a strong adhesive and further sewn together to strengthen the tensile strength. To fix the connection tool 13 to the planar heating part 1, while the relay box 2 side is provided with a plurality of fixing pins 14, 14 ... Protruding from the lower case 9 in advance.
3 are inserted into a plurality of fixing holes 15, 15 ..., And further, a plurality of engaging portions 16, 16 ... Provided in the upper and lower cases 8 and 9 and engaging portions 17, 17, respectively.
.. By connecting the connecting tool 13 between them to increase the tensile strength and connecting the relay box 2 and the connecting tool 13, the relay box 2 and the planar heating part 1 are connected via the connecting tool 13. is doing. Here, the reason why the sheet-like material is used as the connection tool 13 is to reduce the unevenness in the vicinity of the connection portion of the planar heating portion 1 and not to impair the appearance. Furthermore, the connection tool 13
By using a flexible material, it is possible to give the connection part flexibility. By thus relaying and connecting the relay box 2 and the sheet heating unit 1 with the connector 13, the thickness of the relay box 2 can be reduced, and the thickness of the relay box 2 is equal to or less than the thickness of the sheet heating unit 1. It is also possible to

In this embodiment, the connecting tool 13 is arranged below the heat generating wires 6, 6, and the temperature detecting wires 7, 7, and each wire 6, 6, 7, 7 is connected.
Easily contacts the upper case 8 on the upper side,
In order to improve the bending performance of each wire, each wire of the upper case 8,
R (roundness) is attached to the corner contacting 6, 7, and 7.
Needless to say, it is also possible to arrange the connection tool 13 on the upper portion of each of the lines 6, 6, 7, and 7 for connection. Further, it is more effective if the material of the connecting tool 13 is made more flexible or the connecting tools 13 are provided on the upper and lower sides.

Next, the relay box 2 is manufactured by the above method.
And the planar heating part 1 are connected, when the connection part is bent as shown in FIG. 4, or due to slight dimensional variations in manufacturing, the connection tool 13 itself and the heating wires 6, 6, The temperature detection lines 7 and 7 are exposed and damage the appearance, and the heating lines 6 and 6
There is also a possibility that the heat of will be directly applied to the human body and cause a danger. Therefore, in the present invention, the above-mentioned problem is solved by providing the cover 18 that extends the upper part of the relay box 2 in the direction of the planar heating portion 1 and covers the exposed portion. The cover 18 is required only on the upper side in actual use, but if it is provided on the lower side, the same effect can be obtained from the back side.

Further, in the present invention, in order to effectively use the space inside the relay box 2, the electrical component board 10 is also disposed below the connector 13 inside the relay box 2, and as shown in FIG. 19 ... is efficiently implemented. The electric component board 10 is provided with holes 20 ... Through which the fixing pins 14 penetrate, and holes 21 through which the engaging portions 17, 17 for engaging and fixing the connector 13 penetrate. Pin 14 ... and biting parts 17, 17 ...
Penetrates these holes and performs their respective functions. In this embodiment, the electrical component 1 is provided near the heating wires 6 and 6.
9 and 19 are not mounted, but this is the electrical component 19, 1
This is to prevent heat stress from the heating wires 6 and 6. There is no problem even if it is subjected to heat stress, or if it is placed within the heat tolerance range, there is no problem. Needless to say, it is also possible to arrange the electric component board 10 on the upper side of the connector 13.

Further, in this embodiment, the effective utilization of the space by devising the housing of the electric component board 10 is explained by connecting the relay box 2 and the planar heating part 1 by using the connector 13, but the planar shape is explained. It can also be applied to a system in which the heating unit 1 is directly sandwiched between the relay boxes 2. That is, as shown in FIG. 5, a part of the electrical component board 10 is placed under the planar heating portion 1 so as to be overlapped with it, and the electrical component 1
If 9 and 19 are arranged, the same effect can be obtained.

With the above construction, the thickness of the relay box 2 of the surface color warming device can be reduced without impairing the appearance of the connecting portion,
It is possible to reduce the thickness to less than that of the planar heating unit 1, eliminating the risk of people tripping into the relay box 2.
Further, even when a carpet cover or the like is hung, the appearance of the relay box 2 can be improved by eliminating the unevenness.

Further, by effectively utilizing the inside of the relay box 2, it is possible to reduce the size of the relay box 2 so that the relay box 2 does not get in the way and the material of the relay box 2 can be saved.

[0022]

According to the first aspect of the present invention, a sheet-like connecting tool having a high tensile strength is fixed to the planar heating section and the connecting box is engaged with the connecting box to connect the planar heating section and the relay box. With this configuration, the relay box can be fixed to the planar heating part by biting the sheet-like connector, and the thickness of the relay box can be made smaller than when fixing the thick planar heating part by biting. be able to.

According to the second aspect of the invention, since the electric cable located between the relay box and the planar heating section is covered by a part of the relay box, the electrical connection between the relay box and the planar heating section is provided. It is possible to prevent the cable from being exposed and improve the appearance.

According to the third aspect of the invention, a part of the electrical equipment substrate is placed on top of or below the sheet-like connector or the planar heating portion that is bitten by the relay box and located inside the relay box. Therefore, it is possible to arrange the components on the opposite surface of the electrical component substrate that is in contact with the sheet-shaped connector or the planar heating unit, and it is possible to efficiently arrange the electronic components inside the relay box, It is possible to reduce the size of the relay box in a plane.

[Brief description of drawings]

FIG. 1 is a plan view of a main part of an electric carpet showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a sectional view of an essential part for explaining one embodiment of the present invention.

FIG. 5 is a sectional view of an essential part showing another embodiment of the present invention.

FIG. 6 is a cross-sectional view of a main part showing a conventional example.

[Explanation of symbols]

 1 surface heating part 2 relay box 3 electric cable 10 electrical board 13 sheet-like connector 18 cover

Claims (3)

[Claims] 1. A sheet heating device comprising a sheet heating unit, an electric cable connected to the sheet heating unit, and a relay box provided at a connection portion between the sheet heating unit and the electric cable. A sheet-like connecting tool having a strong tensile strength is fixed to the connecting box, and the connecting box is engaged with the connecting box to connect the planar heating unit and the connecting box through the connecting box. Heat collecting equipment. 2. A part of the relay box is extended to the planar heating part side so as to cover the electric cable located between the relay box and the planar heating part. The listed surface heating tool. 3. A planar heating unit, an electric cable connected to the planar heating unit, a relay box provided at a connecting portion between the planar heating unit and the electric cable, and an electrical equipment substrate arranged in the relay box. In order to fix the relay box and the planar heating portion, the connecting tool fixed to the planar heating portion is engaged with the relay box, or a part of the planar heating portion is directly engaged with the relay box. In the planar heating device for carrying out the above, a part of the electrical equipment substrate is arranged so as to be overlapped with the connection tool or the planar heating unit located inside the relay box that is bitten by the relay box. Surface heating tool characterized by.