JPS6259864B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a semifinished product of a heat-sensitive sheet heating element and a method for producing a sheet heat-sensitive heating element, more specifically, a sheet heating element obtained by laminating a sheet heating element and a sheet heat-sensitive element. This relates to a heat-sensitive sheet heating element semi-finished product formed into a long continuous body, and a method for manufacturing a heat-sensitive sheet heating element obtained by cutting this heat-sensitive sheet heating element semi-finished product into appropriate dimensions. be.

Generally, a lead wire connection part 1 is always formed in this type of sheet heating element. For example, when a plurality of heat generating loops 2 having the same pattern are used as a series circuit as shown in FIG. Part A and terminal processing are required, and it is also necessary to take out the lead wire from the heat sensitive element. For this reason, the heating wire cutting part A is generally processed by drilling, etc.
If the planar heating element 5 and the heat sensitive element 8 are connected at this part, there is a problem that a short circuit is likely to occur between the electrode plates 6, 6 of the heat sensitive element 8 during the drilling process, and the end treatment A similar problem occurred in Part B as well. Therefore, the main object of the present invention is to separate the planar heating element and the planar heat-sensitive element at necessary parts so that the lead wire connection section, the heating wire cutting section, or the terminal processing section can be avoided. In addition, by adhering the sheet heating element and the sheet heat-sensitive element in advance in other parts, hot pressing can be performed after processing them separately. The purpose of this is to prevent air pockets from forming during bonding, resulting in insufficient bonding and a decrease in rigidity, as in the case of bonding by methods such as bonding.

The present invention will be described in detail below based on embodiments shown in the figures. The heat-sensitive planar heating element semi-finished product according to the present invention has metal foil formed in a continuous pattern in which a plurality of heating loops 2 having a pair of lead wire connection parts 1 on a part of the circumference share a part with each other. A sheet heating element 5 obtained by covering both sides of a heating circuit 3 formed by etching with an insulating layer 4, and a sheet heating element 5 formed with a plastic semiconductor 7 having negative temperature characteristics between two electrode plates 6. The plurality of pairs of lead wire connection parts 1 and the common parts 9 of each heating loop 2 in the sheet heating element 5 are arranged in a straight line along the longitudinal direction at one side edge of the sheet heating element 5. , the sheet heating element 5 and the sheet heat sensitive element 8 are adhesively fixed with the hot melt layer 10, leaving a portion X corresponding to the plurality of pairs of lead wire connection portions 1 and the shared portion 9 of each heating loop 2. This is a characteristic feature. Further, in the method for manufacturing a heat-sensitive sheet heating element according to the present invention, a plurality of heat generating loops 2 having a pair of lead wire connection portions 1 on a part of the circumference share a part of each other and are continuous, and a plurality of pairs Lead wire connection part 1
A sheet heating element 5 is created by covering both sides of the heating circuit 3 with an insulating layer 4, which is formed by etching a metal foil in a pattern in which the common portion 9 of each heating loop 2 is aligned in a straight line along the longitudinal direction. Then, the above-mentioned planar heating element 5 is connected to the top surface of the planar heat-sensitive element 9, in which a plastic semiconductor 7 having negative temperature characteristics is formed between two electrode plates 6, with a plurality of pairs of lead wires using a hot-melt adhesive. A half-finished heat-sensitive sheet heating element is created by leaving a portion corresponding to the shared portion 9 of the portion 1 and each heating loop 2 and fixing it with adhesive, and cutting this heat-sensitive sheet heating element into an arbitrary length. Depending on the number of complete heating loops 2 included in this, the pair of lead wire connections 1, 1 in the heating loop 2 located at one end in the longitudinal direction are cut, and the other end in the longitudinal direction is cut off. After that, the common parts between all the heating loops 2 that are continuous with the heating loop 2 located in the crocodile are cut, and then the unbonded part remaining between the sheet heating element 5 and the sheet sensing element 8 is bonded with a hot melt adhesive. It is characterized by being fixed with an adhesive, and in this embodiment, the semi-finished heat-sensitive sheet heating element formed into a long continuous body has a size including a plurality of complete heating loops 2. An example is shown in which a heat-sensitive sheet heating element is manufactured by cutting at the position indicated by the imaginary line in the figure. That is, a hot melt layer 10 is previously formed on one side of the sheet heating element 5 and the sheet heat sensitive element 8 over the entire surface, and a plurality of pairs of hot melt layers 10 are formed along one side edge of the sheet heating element 5. Both hot melt layers 10, 10 are adhesively fixed, leaving a portion X corresponding to the portion where the lead wire connecting portions 1, 1 and the common portion 9 of each heating loop 2 are aligned in a straight line, and a semi-finished heat sensitive sheet heating element is obtained. After cutting this to an appropriate length, cut the lead wire connection section 1 at the necessary location, the shared section 9 of each heating loop 2, that is, the heating wire cutting section A, and the terminal insulation treatment section. B is processed, and then both hot melt layers 10, 10 in the unbonded portion X are bonded together by hot pressing or the like.

As described above, the present invention adhesively fixes the planar heating element and the planar heat-sensitive element with the hot melt layer while leaving the parts corresponding to the lead wire connection part and the common part of each heat generating loop, so that a predetermined size can be obtained. It has the advantage that after cutting the semi-finished product, it is easy to process the lead wire connection parts, heating wire cutting parts, and terminal insulation treatment parts at the necessary places. Since the body and the sheet heat-sensitive element are bonded in advance with a hot melt layer, there is no need to align the unbonded parts after each part has been processed, and the sheet heating element and sheet heat-sensitive element are It has the advantage that there are no air pockets between it and the heat-sensitive element, allowing high rigidity to be maintained.

[Brief explanation of the drawing]

FIG. 1 is a partial perspective view showing an embodiment of a semi-finished heat-sensitive sheet heating element according to the present invention, and FIG. 2 is a sectional view of the same, in which 1 is a lead wire connection portion, 2 is a heating pattern, and 3 is a sectional view of the same. 4 is a heating circuit, 4 is an insulating layer, 5 is a planar heating element, 6 is an electrode plate, 7 is a plastic semiconductor, 8 is a planar heat-sensitive element, and 9 is a common part.

Claims (1)

[Scope of Claims] 1. Both sides of a heat generating circuit formed by etching metal foil into a continuous pattern in which a plurality of heat generating loops each having a pair of lead wire connection parts on a part of the circumference share a part of each other. It consists of a planar heating element obtained by covering with an insulating layer, and a planar heat sensitive element formed of a plastic semiconductor having negative temperature characteristics between two electrode plates, and multiple pairs of leads in the planar heating element. The wire connection portion and the common portion of each heat generating loop are arranged in a straight line along the longitudinal direction at one side edge of the sheet heating element, and the sheet heating element and the sheet heat sensitive element form a plurality of pairs of lead wire connection portions. and a heat-sensitive sheet heating element semi-finished product characterized in that a portion corresponding to the common portion of each heating loop is left and is adhesively fixed with a hot melt layer. 2. A plurality of heat generating loops having a pair of lead wire connection portions on a part of the circumference share a part of each other and are continuous, and the plurality of pairs of lead wire connection portions and the shared portion of each heat generation loop extend in the longitudinal direction. A sheet heating element is created by covering both sides of a heating circuit formed by etching a metal foil in a pattern arranged in a straight line with an insulating layer.
The above-mentioned planar heating element is attached to the top surface of the planar heat-sensitive element, which is made of a plastic semiconductor having negative temperature characteristics between two electrode plates, using a hot-melt adhesive to connect multiple pairs of lead wires and share each heating loop. A half-finished heat-sensitive sheet heating element is created by leaving the corresponding part and gluing and fixing it, and cutting this heat-sensitive sheet heating element to a desired length, as well as a heating loop that is completely included in it. According to the number of wires, cut between a pair of lead wire connections in a heating loop located along one longitudinal end, and connect all heating loops that are continuous with the heating loop located along the other longitudinal end. A heat-sensitive sheet heating element characterized in that the common part of the sheet heating element and the sheet sensing element is cut, and then the unbonded part remaining between the sheet heating element and the sheet sensing element is bonded and fixed with a hot melt adhesive. Production method.