JPS6266604A - Terminal structure for thermosensitive wire - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a terminal structure of a heat-sensitive electric wire used in electric heating devices such as electric blankets, bed blankets, and lap blankets.

Conventional technology Traditionally, electric heating devices made of cloth, mainly electric blankets, were dirty and
There was a problem in that there was no countermeasure for this problem, especially when the electric part dripped into the body of the air-fuel mixture blanket, making it impossible to wash it with water.

However, washing with water can be done by taking measures to prevent corrosion of connection pins and tracking between terminals. However, large laundry items such as blankets,
It is not easy to wash at home and dry cleaning by a professional is required.However, conventional electric blankets cannot be dry cleaned.1. In the case of traps, there were the following major problems: Dry-cleaning solvents such as chlorethylene (chlorethylene) elute the plasticizer, resulting in a loss of flexibility and a significant reduction in jacket thickness.

(2) The electrical properties of the polymer thermosensitive layer of the flexible thermosensitive electric wire vary greatly.

(3) There were problems such as cracking or shrinkage of the end treatment molded portion of the flexible thermosensitive wire due to elution of the plasticizer.

In such a problem, the heat-sensitive wire itself should be dry-cleaned/
Even if countermeasures are taken, the dry cleaning N solvent will penetrate from the end of the wire, and the solvent will enter the inside of the polymer temperature-sensitive layer of the wire, causing a significant change in the electrical characteristics.

Means for Solving the Problems The present invention provides a thermosensitive polymeric layer formed between at least one pair of electrodes, an outer covering provided thereon, and at least a portion of the outer covering. The terminal connection part of the terminal electrode of a thermosensitive electric wire made of a dry cleaning solvent barrier resin is fitted into an outer molded product that is insoluble in the dry cleaning solvent, and a potting resin that is insoluble in the solvent is placed inside this outer molded product. It is filled. In dry cleaning, halogenated hydrocarbons such as trichlorethylene 9-tetrachloroethylene trichloroethane and petroleum are used as cleaning agents.

As a potting resin material used in the present invention for petroleum and halogenated hydrocarbons as cleaning agents.

There are materials with excellent solvent resistance and non-affinity, including materials with hydrogen bonds, materials with high bonding, and materials with high crystallinity. Specifically, (1) polyvinyl fluoride , fluorine-containing polymers such as polyvinylidene fluoride, (2) acrylonitrile copolymers such as NBR, (3)
] Polyamides such as nylon 11.12, (4) vinyl alcohol copolymers such as ethylene-vinyl alcohol copolymers and partially saponified ethylene-vinyl acetate copolymers, (6) ionomers, ethylene malein Metal chelates such as acid metal salts (Meta
(6) high-crystalline polyolefins such as high-density polyethylene, poly, and propylene. These polymers or compositions using them as a base polymer are suitable as the barrier polymer material of the present invention.

Among these, those having properties as hot melt adhesives are suitable, and specific examples thereof include polyamide adhesives and carboxyl group-containing polyolefins.

With the above structure, the terminal connection portion of the terminal electrode will be protected from the dry cleaning solvent.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. FIG. 1 is a partially cutaway front view of the heat-sensitive electric wire.

1 is a flexible core thread, 2 is an internal electrode spirally wound around the core thread 1,
3 is a cylindrical polymer temperature-sensitive layer, 4 is a spirally wound external electrode, and 5 is an outer cover made of a barrier resin layer against dry liquid solvents.

Figures 2a and b show the terminal connection part of the electrode at the end of the thermosensitive electric wire, 6 is the connection terminal, 7 is the connection terminal, and 8 is the eyelet that connects the flexible core thread 1 and the internal electrode 2. be.

The terminal connection part of the terminal electrode in Figures 1 and 2 is
It is set in an external molded product 11 that is insoluble in dry cleaning solvents as shown in the figure. FIG. 4 shows a state in which the terminal connecting portion is set inside the external molded product 11.

With the molded product 11 set in this manner, 1° of molten potting resin (insoluble in dry cleaning solvent) is poured into the upper surface of the molded product 11 and is filled and solidified. This filled state is shown in FIG.

Effects of the Invention As described above, by sealing the terminal connection part of the terminal electrode with potting resin inside the molded product, it is possible to prevent the electrical characteristics of the polymer temperature-sensitive wire of the heat-sensitive wire from changing. be.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway front view of a heat-sensitive electric wire, and Figure 2 is a front view of a heat-sensitive wire. 3b is a top view and a side view of the terminal part of a conventional thermosensitive electric wire; FIGS. 3a to 3d are top views of an external molded product according to an embodiment of the present invention;
4A to 4C are a top view, a side view, a front view, and 6 The figure is a perspective view of the same potting resin filled. DESCRIPTION OF SYMBOLS 1...Flexible core thread, 2...Internal electrode, 3...Polymer temperature-sensitive layer, 4...External electrode, 6... ...Outer sheath, 6...Connection terminal, 7
...Connection terminal, 8...Grottle, 9...
... Electrode exposed part, 1o ... Potting resin, 11 ... External molding part. Name of agent: Patent attorney Toshio Nakao and 1 other person rs
Z diagram ((L) (b) Figure 3
U-Button Powerful Hexagonal Product (LJL) (
b) (illusion (b)

Claims (5)

[Claims] (1) In the terminal part of a thermosensitive electric wire, which is formed by disposing a polymer thermosensitive material between at least a pair of electrodes, and providing an outer sheath, at least a part of which is made of a barrier resin layer against dry cleaning solvents, on the outside thereof. A terminal structure of a heat-sensitive electric wire, wherein the terminal connection part of the electrode is fitted into an outer molded product that is insoluble in the solvent, and the outer molded product is filled with a potting resin that is insoluble in the solvent. (2) The terminal structure of a thermosensitive electric wire according to claim 1, wherein the outer molded product and the potting resin are barrier resins against dry cleaning solvents. (3) The terminal structure of a thermosensitive electric wire according to claim 2, wherein the barrier resin is selected from a vinyl alcohol copolymer, an acrylonitrile copolymer, a polyamide fluoride-containing polymer, and a metal chelate polymer. (4) The terminal structure of a thermosensitive electric wire according to any one of claims 1 to 3, wherein the potting resin is a hot melt adhesive. (5) The terminal structure of a thermosensitive electric wire according to claim 4, wherein the hot melt adhesive is a polyamide or carboxyl group-containing polyolefin adhesive.