JPS6337743Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cover, and more particularly to a cover for covering a lead wire attachment portion of a planar heating element, for example.

The connection between an electrical device, such as a sheet heating element, and a lead wire that supplies power thereto must be protected for safety and strength. Conventionally, this protection has been achieved by molding the connection portion with a curable resin such as epoxy resin or polyurethane resin, or a thermoplastic resin such as polyolefin or polyamide. Although this method is simple, the shape of the molded resin is not constant, resulting in not only low commercial value but also large variations in strength.

Another method is to fix a ring made of synthetic resin around this connection part and inject the thermoplastic resin as described above into the ring. This method certainly improves the appearance, increases the commercial value, and reduces variations in strength. However, injecting the resin into the ring required labor, leading to a decrease in productivity.

The present invention relates to a cover for a lead wire connection part of an electric device such as a sheet heating element, which improves the drawbacks of the conventional method. That is, the present invention is a cover for covering the attachment part of a lead wire of an electrical device, and is composed of a ring and a lid, the ring is composed of a collar and a cylindrical part, and the inner peripheral surface of the lower part of the ring is The cover is characterized in that it protrudes toward the side, and the lid has a claw that engages with the inner circumferential surface of the lower portion.

A planar heating element will be explained as an example of an electric device. The cover of the present invention consists of a synthetic resin ring and a lid, but the inner diameter of the ring is wider at the lower part (the side that is fixed to the sheet heating element - the same applies hereinafter) than the opposite side, and it protrudes outward. and the lid is
It has a claw that is engaged with the protruding part of the ring, and after the brim side of the ring is fixed to the planar heating element and the lead wire is connected, the lid is placed over the ring.

The present invention will be explained in more detail based on the drawings. That is, Fig. 1 is a perspective view of a typical example of the cover of the present invention, Fig. 2 is an exploded perspective view thereof, and Fig. 3 is a sectional view taken along line A-A' of the cover shown in Fig. The cover is shown fixed to the mounting part on the planar heating element.

In the figure, 1 is a ring made of synthetic resin.
The material of the ring 1 is polyamide resin, polyester resin, polypropylene resin, polyethylene resin, polycarbonate resin, polyvinyl chloride resin, etc., and specifically, it is made of polyamide resin, polyester resin, polypropylene resin, polyethylene resin, polycarbonate resin, polyvinyl chloride resin, etc. Determined by the material.

The ring 1 consists of a collar 1' and a cylindrical part 1'',
A collar 1' is provided on the outer periphery of the lower part of the cylindrical portion 1'' for fixing to the sheet heating element 3.This collar is fixed to the sheet heating element 3 by an ultrasonic welder, a high frequency welder, or the like. Alternatively, it may be bonded with adhesive or the like.

The inner surface of the ring 1 is larger at the lower part than at the upper part (the side to which the lid is placed - the same applies hereinafter). In other words, it has a downward wide opening structure. The ring wall is also provided with a through hole or notch 11 into which the lead wire 4 is inserted. The shape of the ring is usually circular, oval, or square. The protrusion 12 provided on the inner upper part of the ring is for determining the position of the lid and is not necessarily necessary.

The lid 2 is preferably made of the same material as the ring 1, but a different material can also be used. The size and shape of the lid 2 are determined so that it fits inside the upper part of the cylindrical portion 1''.

The lid 2 is provided with a claw 21. Claw 21
are in close contact with the lower wide opening structure of the ring 1, or open outward so as to push it slightly outward.
The thickness of the claw 21 should be 0.5 to 1.5 mm, the width should be 1 mm or more, and the length should not be in contact with the planar heating element.
Preferably, the spacing is 1 to 1.5 mm. The number of claws 21 varies depending on the size of the ring 1, but 2
~7 pieces, preferably 3~4 pieces.

The lid 2 can also be provided with a small hole 22.
When the small hole 22 is provided, its diameter is preferably 1 mm or less.

With this invention, the connection parts between electric devices such as planar heating elements and lead wires can be made uniform in terms of appearance and strength, and work efficiency has also been improved.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a typical example of the cover of the present invention, FIG. 2 is an exploded perspective view thereof, and FIG. 3 is a sectional view taken along line AA' of the cover shown in FIG. In the drawings, 1...ring, 1'...brim,
1″...Cylinder part, 11...Through hole (or notch), 1
2... Protrusion, 2... Lid, 21... Nail, 3... Planar heating element, 4... Lead wire.

Claims (1)

[Scope of utility model registration request] A cover for covering the attachment part of the lead wires of electrical equipment, consisting of a ring and a lid,
A cover characterized in that the ring comprises a collar and a cylindrical portion, a lower inner circumferential surface of the ring protrudes outward, and the lid has a claw for engaging with the lower inner circumferential surface.