JPS6328880Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a heating element device used in oil atomization heaters and the like.

The oil atomization heater is equipped with a heating element device that causes the atomized oil to collide with each other to raise the temperature and facilitate combustion. As shown in the figure, terminal plates 2 and 3 are stacked on the upper and lower main heating surfaces of a disk-shaped positive temperature coefficient thermistor element 1, respectively, and then insulating porcelain plates 4 and 5 are stacked on top of the terminal plates 4 and 5, respectively, and these are fastened. It has a basic structure that is fixed together with metals 6 and 7, and from the peripheral edge of the terminal plates 2 and 3, there is a cutout on the PTC thermistor element 1 side to prevent the PTC thermistor element 1 from shifting. The slit holes 4a, 4a and 5a, 5 provided in the insulating porcelain plates 2 and 3 are provided on the sides of the insulating porcelain plates 4 and 5, respectively.
Holes 4b and 4b are formed in the insulating porcelain plate 4 from the terminal plates 2 and 3 by protruding cut-and-raised pieces 2b, 2b and 3b, 3b which are fitted into the terminal plates 2 and 3, respectively, and which regulate the positions of the terminal plates 2 and 3, respectively. Lead wire 8 through
and 9 are known.

In the heating element device having the above configuration, the cut and raised pieces 2a, 2 of the terminal board 2 may be damaged due to vibrations or stress applied from the outside, or poor assembly.
If a or the cut and raised pieces 3a, 3a of the terminal plate 3 ride on the upper and lower main heating surfaces of the PTC thermistor element 1, a positional shift occurs in the PTC thermistor element 1, and the insulating porcelain plate 4 or 5 and the PTC thermistor There were problems such as poor thermal adhesion with the element 1 and short circuits.

In addition, in order to solve the above problem, increasing the protruding length of the cut and raised pieces 2a, 2a and 3a, 3a in the thickness direction of the positive temperature coefficient thermistor element 1 will improve the problem to some extent, but it cannot be said to be sufficient. Also, if this is done, the spatial distance between the terminal boards 2 and 3 becomes small, causing a problem that the dielectric strength between the terminal boards 2 and 3 is reduced.

The present invention was devised to solve the above-mentioned problems in conventional heating element devices. Fit the raised piece into the fitting hole provided in the insulating spacer into which the positive temperature coefficient thermistor is fitted, and provide a notch on both terminal boards to allow the tip of the cut-and-raised piece of the other terminal board to escape. As a result, we have created a heating element device that is easy to assemble and has less variation in quality by regulating the position of the PTC thermistor element using an insulating spacer and a cut-and-raised piece of the terminal board to prevent the position of the PTC thermistor element from shifting. is intended to provide.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 and FIG. 3 show a perspective view and an exploded perspective view, respectively, of a heating element device according to the present invention.

In FIG. 2, 11 is an insulating spacer, 12,
13 is an insulated porcelain board, 14 and 15 are fasteners, 1
6 and 17 are lead wires.

The insulating spacer 11 is made of mica, porcelain, or the like, and as shown in FIG. 3, a disk-shaped positive temperature coefficient thermistor element 18 having electrode films 18a and 18b formed on the upper and lower main heat generating surfaces, respectively, is fitted therein. It has a circular insertion hole 19.

On the outer periphery of the insertion hole 19 of the insulating spacer 11, there are cut and raised pieces 20a, 2 of a terminal plate 20, which will be described below.
Slit-shaped holes 22, 22 into which the terminal board 21 is inserted, and holes 23, 23 similar to those described above into which the cut and raised pieces 21a, 21a of the terminal board 21 are inserted are provided.

The terminal plate 20 includes the above-mentioned cut and raised pieces 20a, 20a, which are bent at a substantially right angle with respect to the terminal plate 20 with a part of the periphery protruding in the radial direction, and a cut piece of another terminal plate 21. Notches 20b, 20b are provided to avoid contact between the tips of the raised pieces 21a, 21a and the terminal plate 20, while lead connections are provided for connecting the lead wires 17 by means such as spot welding. It has 25 pieces.

The cut and raised pieces 20a, 20a and the cutout portion 2
0b and 20b are both formed so as to be located on a substantially straight line passing through the center of the terminal board 20.

The notch 27 formed at a position approximately 180 degrees away from the lead connection piece 25 is for avoiding contact between the lead wire 16 of the other terminal board 21 and the terminal board 20.

On the other hand, the other terminal board 21 is the terminal board 20.
Similar cut-and-raise pieces 21a, 21a, notch portion 21
b, 21b, 27 and a lead connection piece 28 for the lead wire 16.

Slit-shaped holes 23, 23 of insulating spacer 11
, cut and raised pieces 21a, 21 of the terminal plate 21 described above.
a, respectively, and the insulating spacer 11
After inserting the lead wire 16 into the hole 30 of one of the two protrusions 29, 29 protruding radially outward from the peripheral edge of the insulating spacer 11, the insertion hole 19 of the insulating spacer 11 is inserted.
The positive temperature coefficient thermistor element 18 is inserted into the terminal board 20, and the cut-out pieces 20a, 20a are stacked on top of the terminal board 20.
The slit-shaped holes 22, 22 of the insulating spacer 11
When inserted into the respective parts, the assembly 3 as shown in FIG.
1 is obtained, and the terminal board 2 is connected by the insulating spacer 11.
The position of the positive temperature coefficient thermistor element 18 with respect to 0,21 is defined.

After assembling as described above, the insulating porcelain plate 13 is placed on the terminal board 21, and the protruding pieces 13a protruding from the peripheral edge of the insulating porcelain plate 13 are placed on the protruding pieces 2 of the insulating spacer 11.
9 and 29, while stacking terminal board 2
An insulating porcelain plate 12 is placed on top of the
The lead wires 16 and 17 are inserted into the lead insertion holes 12b and 12b provided in the lead insertion holes 12a, respectively, and the approximately U-shaped fasteners 14 and 15 with bent portions at both ends are inserted into the protrusions 12a, 29, 13a and 12a. ,29,
13a, the heating element device shown in FIG. 2 can be obtained.

If the heating element device is configured as described above, the position of the PTC thermistor element 18 with respect to the terminal plates 20, 21 is completely defined by the insulating spacer 11 as described above, and the position of the PTC thermistor element 18 is completely defined.
Accidents such as poor thermal adhesion between the insulating porcelain plates 12, 13 and the positive temperature coefficient thermistor element 18 or short circuit due to misalignment of the PTC thermistor element 18 can be completely eliminated.

In the above embodiment, the tip ends of the cut and raised pieces 20a, 20a of the terminal board 20 and the cut and raised pieces 21a, 21a of the terminal board 21 are narrower in width than other parts, and there is a step in the middle. (See Figure 3), but this is because the insulating spacer 1
1 and the insulating spacer 11 is positioned approximately at the center of the thickness of the positive temperature coefficient thermistor element 18, and the step portion may be omitted.

Moreover, the cut and raised pieces 20a, 20a and 21
As shown in FIG.
It may be bent after being inserted into the

As is clear from the detailed description above, the present invention involves fitting a positive temperature coefficient thermistor element into the fitting hole of the insulating spacer to regulate the position of the positive temperature coefficient thermistor element, and connecting the terminal to the hole provided in the insulating spacer. Since the position of the terminal plate is also regulated by inserting a cut and raised piece of the plate, there is no possibility of misalignment of both the PTC thermistor element and the terminal plate, and the position of the PTC thermistor element and the terminal plate is prevented. Since the positional relationship between the PTC thermistor element and the PTC thermistor element can always be kept constant, there is no risk of the cut and raised piece of the terminal board riding on the PTC thermistor element as in the past, and there is no gap between the terminal plate and the PTC thermistor element. Accidents such as poor thermal adhesion or short circuit between the positive temperature coefficient thermistor element and the insulating plate can be completely prevented, and quality can be greatly improved.

In addition, by making the outer shape of the insulating spacer the same as the outer shape of the insulating plate, positioning and fixing of the insulating spacer and the insulating porcelain plate can be easily performed.
Furthermore, since the insulating plate does not have holes, grooves, etc., there are no parts with weak mechanical strength, and the insulating plate can be made thinner.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view of a conventional heating element device;
3 is an exploded perspective view of FIG. 2, FIG. 4 is a cross-sectional explanatory view showing the state in which the position of a PTC thermistor element is regulated by an insulating spacer and a terminal plate, and FIG. FIG. 5 is a cross-sectional explanatory view of a modification of FIG. 4. 11... Insulating spacer, 12, 13... Terminal board, 14, 15... Fastener, 16, 17... Lead wire, 18... Positive temperature coefficient thermistor element, 19...
...Fitting hole, 20, 21...Terminal plate, 21a, 21
b... cut and raised piece, 20b, 21b... notch part,
22, 23...hole, 31...assembly.

Claims (1)

[Scope of utility model registration request] In a heating element device in which the PTC thermistor element is fitted into an insulating spacer hollowed out in the shape of the PTC thermistor element, terminal plates and insulating plates are sequentially stacked on the upper and lower main heat generating surfaces of the spacer, and the terminal plates and insulating plates are stacked one after another with a fastener, each of the above A cut-and-raised piece is provided on each terminal board, and these cut-and-raised pieces are fitted into fitting holes provided in the insulating spacer to regulate the position of the terminal board with the spacer, and also to control both terminals of the positive temperature coefficient thermistor element. A heating element device characterized in that a plate is provided with a notch portion through which the tips of other cut-and-raised pieces escape.