JPS645215Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention constructs a temperature-sensitive inductor element by winding a rectangular magnetic core made of a temperature-sensitive magnetic material having a predetermined Curie point, and suppresses sudden changes in inductance near the Curie point. The present invention relates to a holding plate for arranging a temperature detection element, which is extracted as an electric signal and used for temperature control of various devices, in pressure contact with a temperature-tested part.

Conventionally, as shown in FIG. 1, a temperature detecting element using a temperature sensitive inductor of this kind has been fixed by winding a core 2 together with a winding 3 around a holding member 1 made of resin molding. Attachment to the temperature-tested part is performed using a fitting claw 11 provided on the holding member 1.

However, in such a structure, the overall heat capacity increases, which deteriorates the thermal response required of the temperature detection element, creates a gap between the temperature-tested part and the temperature detection element, and furthermore, increases the heat resistance due to temperature cycles, etc. This has the disadvantage that the mechanical strength of the holding member itself deteriorates, reducing reliability. Further, since the core 2 is wound with the holding member 1, there is also a drawback that the degree of connection between the core and the winding is poor, reducing workability and increasing costs.

Therefore, an object of the present invention is to eliminate the above-mentioned drawbacks and to provide a holding plate that has a simple structure and can reliably fix a temperature detection element without deteriorating its response.

The holding plate according to the present invention is a holding plate for attaching a temperature detection element, which is formed by winding a rectangular core made of a temperature-sensitive magnetic material having a predetermined Kyrie point, to a temperature-detected part. It has a notch that can be pinched from both sides parallel to the axial direction, and has a holding plate in the center of the notch that presses the core against the temperature-tested area when the core is attached to the notch. However, the pressing plate is characterized in that the tip thereof is folded back downward, so as to prevent the core from shifting in the direction of the central axis.

Embodiments of the present invention will be described below with reference to FIGS. 2 and 3.

In FIG. 2, a holding plate 10 is made of an elastic metal material such as stainless steel, and has two notches 11 at one end. The plate between these two notches 11 is bent upward to form a pressing plate 12 having spring properties, and the tip of the pressing plate 12 is bent downward. Reference numeral 13 denotes a hole through which a screw is inserted when screwing the temperature detection portion.

Referring also to FIG. 3, the holding plate 10 is attached to the temperature-tested part by screws 5. A temperature-sensitive inductor consists of a rectangular core 2 made of a temperature-sensitive magnetic material having a Curie point corresponding to the detected temperature and a predetermined heat-resistant winding 3.
It is installed so as to be sandwiched between the outer edges of two notches 11. At this time, the pressing plate 12 enters into the core 2 and acts to bring the core 2 into pressure contact with the temperature-tested portion. Further, the folding of the tip of the holding plate 12 prevents the core 2 from shifting in the central axis direction.

If the temperature-tested part is made of a conductive material such as metal, the temperature-tested part should be made so that the holding plate 12 and the temperature-tested part do not form a coil that interlinks with the magnetic flux generated inside the temperature-sensitive inductor. Shorten the folded part.

As described above, according to the present invention, it is possible to wind the core 2 without incorporating the holding member 1 as in the conventional case, so that workability is improved and costs can be reduced. In addition, the holding plate 12
As shown in FIG. 2, normally faces downward with respect to the surface of the holding plate 10, but when it is fixed to the temperature-tested part with the screws 5, the temperature-tested part Bending stress occurs. This bending stress becomes even stronger when the temperature-sensitive inductor is inserted, as shown in FIG. 3, and the temperature-sensitive inductor is brought into very strong pressure contact with the temperature-tested portion.
As a result, the heat of the temperature-tested portion is directly conducted to the temperature-sensitive inductor, making it possible to obtain good thermal response. In addition, since the holding plate 1 is made of metal, the heat received by the holding plate 1 from the temperature-tested part is conducted to the temperature-sensitive inductor through the holding plate 12, making it possible to obtain even better thermal response as a temperature detection element. be.

Further, since the holding plate 1 is made of an elastic metal material, it is more resistant to abrasion than a holding member made of resin or the like, has improved mechanical strength, and is resistant to deterioration, improving overall reliability. Furthermore, it is very easy to replace it with another temperature-sensitive inductor with a different Curie temperature.

As described above, according to the present invention, a holder for a temperature sensing element has the advantages of low cost, good thermal response, compatibility with other temperature sensitive inductor elements, and high reliability. We can provide boards.

[Brief explanation of drawings]

Fig. 1 shows an assembly structure of a conventional holding member and a temperature detection element, Fig. 2 shows an embodiment of a holding plate according to the present invention, and Fig. 3 shows a holding plate and a temperature sensing element according to the present invention. The figure which showed the assembly structure with a warm inductor. In the figure, 1 is a holding member, 2 is a core, 3 is a winding wire, and 5
10 is a screw, 10 is a holding plate, and 12 is a holding plate.

Claims (1)

[Scope of utility model registration request] A holding plate for attaching a temperature detection element formed by winding a rectangular core made of a temperature-sensitive magnetic material having a predetermined Kyrie point to a temperature-detected part,
The holding plate has a notch that can hold the core from both sides parallel to the central axis thereof, and a holding plate that presses the core against the temperature detection portion when the core is attached to the notch. at the center of the notch, and the pressing plate is shaped so that the tip thereof is folded back downward to prevent the core from shifting in the direction of the central axis. Holding plate for temperature detection element.