JPH03102793A - Component of constant temperature heat-emitting substance and manufacture thereof - Google Patents

Abstract

PURPOSE:To reduce the installation space for products by mounting connection members on both sides of a plate-shaped constant temp. heat emitting body, and molding a heat conductive exterior resin provided with a mounting hole in a single piece at the peripheral zone of the heat emitting body. CONSTITUTION:A connection member 6 is fitted to each side of a plate-shaped constant temp. heat emitting body 2, and a heat conductive exterior resin 3 equipped with a mounting hole 8 is molded in a single piece at the peripheral zone of this heat emitting body 2 fitted with connection members 6. The thermal conductiveness of the exterior resin 3 and its provision with mounting hole 8 permits mounting of products in the desired position as they are, to eliminate necessity for use of any holder metal piece, etc., for mounting, which suppress the space and simplifies the manufacturing process.

Description

DETAILED DESCRIPTION OF THE INVENTION [Objective of the Invention (Field of Industrial Application)] The present invention relates to a constant temperature heating element component used for preventing dew condensation on a rotary head in a video tape recorder, for example, and a method for manufacturing the same.

(Prior art) An example of the conventional manufacturing method of constant temperature heating element parts is shown in Fig. 6(a).
This will be explained with reference to (g) to (g) and FIG.

First, as shown in FIG. 6(a), electrode recesses 30a. A positive temperature coefficient thermistor 30 as a constant temperature heating element is prepared, and both concave portions 30a and 30b of the positive coefficient thermistor 30 are
As shown in b), a pair of electrodes 3 is connected by dip soldering or other method.
Install 1a and 3lb.

Next, as shown in FIGS. 6(c) and 6(d), the connecting cords 33a, 33b drawn out from the connector 32 are connected to the electrodes 31a, 3lb attached to the positive temperature coefficient thermistor 30 by caulking.

The connection cords 33a and 33b are covered with tubes 3 in advance.
4a and 34b are inserted, and when the above-mentioned caulking process is completed, both tubes 3 are inserted as shown in FIG. 6(e).
4a and 34b cover the caulked portion.

Next, the outer periphery of the positive temperature coefficient thermistor 30 is shown in FIG. 6(f).
After covering with a cylindrical heat shrink tube 35 as shown in
This heat shrink tube 35 is subjected to heat treatment, as shown in FIG.
A positive characteristic heating element component 40 shown in g) is obtained.

In order to attach the positive characteristic heating element component 40 manufactured in this manner to the wiring board 41, as shown in FIG. A screw 43 that surrounds the outer periphery of the PTC thermistor 30 in the body part 40 and is inserted into the mounting hole is screwed into the wiring board 41.

However, in the conventional manufacturing method described above, there are many manufacturing steps and a large number of parts, resulting in high manufacturing costs.In addition, since the positive temperature heating element component 40 itself does not have a hole for mounting, a separate presser metal fitting 42 is required. This poses a problem in that the required space occupies a large amount of space in the installed state, making it difficult to install in a limited space.

(Problems to be Solved by the Invention) The present invention has been made in view of the above circumstances, and is a constant temperature device that can simplify the manufacturing process, reduce manufacturing costs, and contribute to reducing the installation space of the product. The object of the present invention is to provide a heating element component and a method for manufacturing the same.

[Structure of the Invention (Means for Solving the Problems)] The constant temperature heating element component of the present invention includes connecting members attached to both sides of a plate shaped constant temperature heating element, and an outer peripheral area of the plate shaped constant temperature heating element to which the connecting members are attached. It consists of a connecting member integrally molded with a thermally conductive exterior resin with mounting holes.

Further, the method for manufacturing a constant temperature heating element component of the present invention includes a step of attaching connecting members to both sides of a plate-shaped constant temperature heating element, and a thermal conductive film with mounting holes in the outer peripheral area of the plate-shaped constant temperature heating element to which the connecting members are attached. and a step of integrally molding an exterior resin having the following.

(Function) According to the present invention, since the exterior resin has thermal conductivity and is provided with mounting holes, the product can be mounted as is at a desired location, and there is no need for a holding fitting or the like for mounting. Space saving can be achieved.

Further, according to the manufacturing method of the present invention, a product can be obtained simply by attaching the connecting member to the plate-shaped constant-temperature heating element and then integrally molding the exterior resin on the outer peripheral area of the plate-shaped constant-temperature heating element.

(Example) Examples of the present invention will be described in detail below.

FIG. 1 shows a constant temperature heating element component 1 obtained by the method of this embodiment.

This constant temperature heating element component 1 includes an exterior resin 3 incorporating a positive temperature coefficient thermistor 2 (details will be described later) as a constant temperature heating element, lead wires 4a, 4b drawn out from this exterior resin 3, and lead wires 4a, 4b, A connecting member 6 consisting of a connector 5 is provided at the end of the connecting member 4b.

Next, a method for manufacturing the constant temperature heating element component 1 will be described in detail with reference to FIGS. 2 to 4.

First, as shown in FIG. 2, a disk-shaped positive temperature coefficient thermistor 2 as a constant temperature heating element is prepared.
The connecting member 6 is then attached as shown in FIG.

That is, the core wires 4c of both lead wires 4a and 4b in the connecting member 6 are connected to the electrode surfaces formed on both surfaces of the PTC thermistor 2 by dip soldering.

Next, an exterior resin 3 having thermal conductivity and flame retardancy is integrally molded over the entire outer circumference of the positive temperature coefficient thermistor 2 using a mold in which it has been formed in advance, thereby producing a constant temperature heating element component 1 shown in FIG.

As shown in FIGS. 4(a) and 4(b), the exterior resin 3 has a rectangular parallelepiped-shaped surrounding portion 3 surrounding the positive temperature coefficient thermistor 2.
a, and the lead wires 4a and 4b in this surrounding portion 3a.
It is provided with a mounting piece portion 3b which is protruded from the side opposite to the side.

The surrounding portion 3a has side holes 7a extending from both side walls thereof to the outer periphery of the PTC thermistor 2. 7b is provided to allow air to flow around the outer periphery of the PTC thermistor 2 to prevent the PTC thermistor 2 from being reduced.

The mounting piece 3b is provided with a mounting hole 8 for screw insertion.

Furthermore, a small protrusion 9 for preventing displacement is provided on the bottom side of the surrounding portion 3a.

To attach the constant temperature heating element part 1 manufactured as described above to the wiring board 41, as shown in FIG. The screw 10 inserted into the mounting hole 8 is screwed into the wiring board 41.

As described in detail above, according to the method of this embodiment, there are a step of attaching the lead wires 4a and 4b of the connecting member 6 to both sides of the PTC thermistor 2, and a step of attaching the lead wires 4a and 4b of the PTC thermistor 2 to the outer peripheral area of the PTC thermistor 2. The constant-temperature heating element component 1 can be obtained through two steps of integrally molding the components 3 and 3, and the number of parts and steps are small, and manufacturing costs can be reduced.

In addition, since the exterior resin 3 has thermal conductivity and is provided with the mounting hole 8, the constant temperature heating element component 1 can be directly mounted on the wiring board 41 without using a holding fitting or the like, and can be used for use. It can also contribute to reducing the installation space.

The constant temperature heating element component 1 can also be used to prevent condensation on the rotary head of a DAT.

It goes without saying that the present invention can be modified in various ways other than the embodiments described above.

[Effects of the Invention] According to the present invention described in detail above, by having the above structure, it is possible to provide a constant temperature heating element component that can reduce the installation space of the product.

Further, according to the method of the present invention, the manufacturing process can be simplified with a small number of parts, and manufacturing costs can be reduced.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a constant temperature heating element component produced by an embodiment method of the present invention, FIGS. 2 and 3 are perspective views each showing the manufacturing process of the embodiment method, and FIG. 4(b) is a front view of the same as the above, FIG. 5 is a perspective view showing the mounting mode of the same as the above, and FIGS. 6(a) to (g) are respective manufacturing examples of conventional examples. FIG. 7 is a process explanatory drawing showing the process, and is a perspective view showing a conventional mounting manner. 1... Constant temperature heating element component, 2... Positive characteristic thermistor,
3... Exterior resin, 6... Connection member. {0} (b) Fig. 6 Fig. 41 (f) (9) Fig. 6 Fig. 7

Claims (2)

[Claims] (1) Connecting members are attached to both sides of a plate-shaped constant-temperature heating element, and a thermally conductive exterior resin with mounting holes is integrally molded on the outer peripheral area of the plate-shaped constant-temperature heating element to which the connecting members are attached. A constant temperature heating element component characterized by: (2) A process of attaching connection members to both sides of the plate-shaped constant temperature heating element, and a process of integrally molding an exterior resin having heat conductive properties with mounting holes on the outer peripheral area of the plate-shaped constant temperature heating element to which the connection members are attached. A method of manufacturing a constant temperature heating element component, comprising: