JPS5844505Y2 - temperature switch - Google Patents

Description

[Detailed description of the invention] The present invention relates to a temperature switch that combines a reed switch, a temperature-sensitive ferromagnetic material, and a permanent magnet to open and close the reed switch by increasing or decreasing magnetic flux due to temperature changes. Regarding structure.

Conventionally, when fixing a temperature switch having a lead wire extending in the axial direction of the reed switch to a heat absorbing plate, one of the lead wires is first fitted with a cylindrical portion of the heat absorbing plate, and then a hole is provided through which the lead wire can be inserted. Insert the fixed tube into each lead wire, insert the temperature switch main body into the center of the cylindrical part of the heat absorption plate, fit the fixed tube into the cylindrical part from both sides, temporarily assemble it, and inject resin to fix it. There is.

This method has many drawbacks as follows.

(1) The cylindrical part of the heat absorbing plate must be passed through the lead wire before the fixed tube.

(2) Since long lead wires are connected and temporarily assembled without protecting or reinforcing the connection parts, stress is applied to the sealed glass part of the lead due to handling of the lead wires, causing cracks, cracks, and chips. There is a high rate of

(3) Since a considerable amount of force is required to fix the fixed tube to the cylindrical portion of the heat absorbing plate, there is a high risk of cracking or chipping the sealed glass portion of the lead.

(4) Heat considerations during temporary assembly Even after temporary assembly, the product must be handled with care and care until the resin is injected and solidified.

An object of the present invention is to provide a heat absorbing plate that eliminates these drawbacks, does not require the insertion of lead wires, and has a structure that facilitates automatic assembly.

The present invention has a structure in which the switch part, which is fixed by fitting fixed tubes at both ends of the temperature switch body and injecting resin, is sandwiched and fixed by bending the heat absorption plate and overlapping the semi-cylindrical parts formed at both ends of the heat absorption plate. It is.

Note that the semi-cylindrical portion herein refers to a shape in which the cylindrical wall is partially removed along the axial direction, and is not limited to a half-cylindrical shape divided by the diameter of the cylinder.

Further, the semicircular cylinders at both ends do not need to have a symmetrical shape.

The invention will be explained in detail below with reference to the drawings.

FIG. 1 is a perspective view showing an example of a conventional temperature switch, and FIG. 2 is an exploded perspective view showing an assembly method thereof.

Referring to both figures, 1 is a reed switch, 2 is a lead of the reed switch, and is connected to a lead wire 3 through a connecting portion 4.

Reference numeral 5 denotes a fixed tube made of an insulating material that protects the reed switch 1 and the connecting portion 4 and supports the lead wire.

6 is a heat absorbing plate, which is an aluminum plate with good formability and heat conductivity, and the cylindrical part 7
The cylindrical portion is provided with a notch 11 for injecting resin, and the mounting margin is provided with a hole for mounting.

In this conventional example, as described above and shown in FIG. 2, it is necessary to insert the lead wire into the cylindrical portion 7, and the lead wire is long and therefore difficult to handle.

Note that the temperature switch body in which a permanent magnet and a temperature-sensitive magnetic material are arranged around the reed switch 1 is indicated by S.

FIG. 3 is an exploded view showing a first embodiment of the present invention.

The same symbols are used for parts similar to those in the conventional example.

Semi-cylindrical parts 7-1 and 7-2 are formed at both ends of one plate constituting the heat absorbing plate 6, and the mounting margins are 8-1 and 8-.
A notch 10 for bending is made in the center part, which is 2.
Holes 9-1 and 9-2 are bored at symmetrical positions with respect to the line of notch 10 as a center line.

The fixing tube 5 is placed over the temperature switch main body S from both sides, and the semi-cylindrical part 7-1 is fixed as shown by the arrow.
Fit it in.

Adhesive is applied to the entire inner surface of the heat absorbing plate 6.

Bend at the notch 10 and attach the parts 8-1 and 8-
2 are placed one on top of the other, and on the other hand, the temperature switch main body S and the fixed tube 5 are sandwiched between the semi-cylindrical portions 7-1 and 7-2.

FIG. 4 is a perspective view showing the assembly thus assembled, and the mounting holes 9-1 and 9-2 overlap, so that one mounting hole 9 is used.

The cylindrical portion is formed by semi-cylindrical portions 7-1 and 7-2 and is fixed to the fixed tube 5, so that the temperature switch main body S is fixedly supported within the cylindrical portion.

FIG. 5 shows another embodiment of the present invention, in which the fixed tube 5 has a locking claw 5-1 for preventing falling off as shown in FIG. A notch 11 is provided in and engaged with the locking pawl 5-1.

In FIG. 6, 5-2 is a window for monitoring the sealed glass portion of the reed switch, and 5-3 is an insertion hole for a lead wire.

Although it is not possible to apply a fixed tube with protrusions around the periphery to the structure of a conventional heat absorbing plate, it is possible according to the present invention.

In the embodiment, the part that internally holds the temperature switch main body S and the fixed tube is a cylindrical part, but it may be square or polygonal.

In addition, a fitting convex part and a concave part are provided on the abutting surface of this clamping part,
Although it is conceivable to provide a protruding piece on the attachment margin to ensure more reliable overlapping by folding, the application of adhesive alone is sufficient for overlapping.

Of course, even more reliable assembly can be achieved by providing the notch 11' arbitrarily and injecting the resin.

The present invention has the above-mentioned configuration, and when assembling, it is possible to reduce the chances of handling the reed switch from the axial direction, which improves the yield. It has the advantage of being excellent in mass production because it can be assembled into a finished product with simple tasks that can be automatically assembled.

[Brief explanation of drawings]

All drawings are perspective views. FIG. 1 is a completed view showing a conventional example, and FIG. 2 is an exploded view of the same. 3 and 4 are an exploded view and a completed view, respectively, of the first embodiment of the present invention. FIG. 5 is a completed view of the second embodiment of the present invention, and FIG. 6 shows the fixed tube used in the second embodiment. 1...Reed switch, 2...Lead, 3...Leader wire, 4...Connection part, 5
...Fixed tube, 6... Heat absorption plate, 7...
... Cylindrical part, 7-1.7-2 ... Half cylinder, 8
．． 8-1.82...Mounting allowance, 10...
...notch, 11...notch, 5-1...
...Latching claw, 5-2...Window, S...
Temperature switch body.

Claims (1)

[Scope of utility model registration request] The temperature switch body consists of a permanent magnet, a temperature-sensitive ferromagnetic material, and a reed switch with these fixed to the outer periphery, a lead wire connected to each lead of the reed switch, and a lead wire that covers the connection part. A temperature switch comprising a fixed tube fitted to both ends of the switch, a heat absorbing plate having a cylindrical part for inserting and fixing the temperature switch main body and the fixed tube, and a mounting margin for installation, wherein the heat absorbing plate is one part. Two plates with semi-cylindrical parts formed at both ends are folded and overlapped at the center so that the bi-cylindrical parts overlap. 1. A temperature switch comprising a mounting allowance, wherein the temperature switch main body and the fixing tube are housed in the cylindrical portion by overlapping the amphibodi cylindrical portions.