JPS5844506Y2 - temperature switch - Google Patents

Description

[Detailed description of the invention] The present invention relates to a temperature switch in which the reed switch is opened and closed by the magnetic action of a permanent magnet and a temperature-sensitive magnetic material, and particularly relates to an improvement of a heat receiving plate (heat absorption plate) having a mounting clearance. It is something.

Conventionally, a so-called axial type temperature switch in which a lead wire is connected in the direction of the lead of a reed switch has been widely used, but it has disadvantages as it is difficult to say that it is a type that can be mass-produced.

Namely, (1) the length in the axial direction is large because a fixed tube is used to surround the connection between the lead wire and the lead of the reed switch and to fix the lead wire, and (2) the length in the axial direction is large. When connecting the wires, it is necessary to match the axes, and the lead must be wrapped in the thin wire of the lead wire and soldered. (3) During the assembly process, stress is applied to the lead wire through the sealed glass part of the lead. There is a high risk of cracks, cracks, etc., and when handling lead wires with user force of 3+, careless twisting may cause twisting of the seal of the lead, even though it is temporarily fixed at the insertion part of the fixed tube. (4) When installing a heat receiving plate, it is necessary to insert a lead wire into the cylindrical part, and in the case of a heat receiving plate with a U-shaped groove with an installation allowance, it is necessary to insert the lead wire through the cylindrical part. Although it is not troublesome, it has drawbacks such as the heat-receiving surface is small and uneven.

The purpose of this invention is to eliminate these drawbacks by creating a wire in which the lead wire is drawn out at right angles to the lead (i.e., a radial type).
It is an object of the present invention to provide a temperature switch equipped with a heat receiving plate having a structure that is suitable for mass production.

The present invention connects a lead wire at right angles to the lead extending in the axial direction of the reed switch, and connects the lead wire, node switch, and fixed tube to both ends of the heat receiving plate by bending the heat receiving plate that has a mounting allowance. It is configured to be held between the formed semi-cylindrical parts, and the bow wire is drawn out in the radial direction through a groove provided in the fixed tube and a notch provided in the semi-cylindrical part.

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.

A conventional example and an embodiment according to the present invention will be described with reference to the drawings.

1st. FIG. 2 is an assembled and exploded view of a conventional axial type temperature switch.

S is a temperature switch body in which a permanent magnet and a temperature-sensitive magnetic material are fixed to reed switch 1, 2 is a lead, 3 is a lead wire,
Reference numeral 4 designates a soldered connection portion between a lead and a lead wire, 5 a fixed tube made of an insulating material, 6 a heat receiving plate made of aluminum, 7 a covering portion, 8 a mounting margin, and 9 a mounting hole.

After fixing the fixed tubes 5 to both sides of the reed switch 1 of the temperature switch S, cover the heat receiving plate 6 as shown by the arrow and
Assemble as shown in the picture.

Turn it over, inject the resin, and fix it.

An adhesive may be applied to the covering portion 7 in advance.

In the case of this heat receiving plate, although it is easy to assemble the temperature switch main body S, there is a drawback that the heat receiving surface is limited to the mounting margins 8 on both sides, and the width of the covering portion 7 cannot be utilized.

FIG. 3 is an exploded view of the temperature switch according to the present invention.

A lead wire 3 is connected to a lead 2 of a reed switch 1 in a perpendicular direction at a connecting portion 4.

A sufficient connection can be obtained by connecting it to the lead 2 and soldering it, and it does not require much effort just to align the directions of the two lead wires.

As shown in the figure, the fixed tube 5 is provided with a groove 5-1 in the axial direction, and the fixed tube 5 is fixed to both ends of the temperature switch main body S by fitting a lead wire into this groove 5-1.

The original shape of the heat receiving plate 6 is as shown in the figure.

That is, both ends in the elongated direction are bent to form a semi-cylindrical part 7-
1.7-2.

A semicircular notch 10 for holding the lead wire is provided at an appropriate position at the end thereof.

8-1. 8 to 2 are mounting allowance parts, in which notches 11 are provided at the positions to be bent to facilitate bending, and mountings of the same shape and dimensions are provided at corresponding positions across the line of the notches 11. has holes 9-1 and 9-2.

A temperature switch body S to which a fixed tube is fixed (indicated by an arrow) is placed in the center of the heat receiving plate 6.

Since the adhesive is applied to the entire upper surface of the heat receiving plate 6 in the figure, bend it at the notch 11 so that the semi-cylindrical parts 7-1 and 7-2 at both ends wrap the temperature switch body S. The mounting margin is formed by adhering two pieces and is a semi-cylindrical part 71.7-
2 is glued to the upper half of the fixed tube, and the lead wire 3 is then sandwiched in the notch 8.

The folded state is shown in FIG.

The mounting holes 9 overlap 9-1 and 9-2 to form one hole.

With a simple bending operation, the lead wire, the temperature switch body, and the fixed tube can be held accurately and reliably.

FIG. 5 shows another embodiment of the present invention, in which the mounting margin 8 is provided only on one side, and the semi-cylindrical portion 7-2 has a window 12.
This makes it easy to inject resin into the gap and monitor the temperature switch body.

In the embodiment, the semi-cylindrical portion is a quarter circle, but it goes without saying that there is no problem even if the semi-cylindrical portion is polygonal or uneven except for the vicinity of the part where the leader line is held.

As mentioned above, the present invention can solve many of the drawbacks of the conventional axial type temperature switch.

In other words, (1) the axial length is shortened, (2) the lead wire can be connected by normal tack soldering and no special care is required, and (3) the lead wire can be connected to the groove of the fixed tube. (4) Heat-receiving plate that is not only fitted but also clamped by the ends of the heat-receiving plate, so that the lead-out wire does not get twisted and the stress applied to the lead-out wire is hardly transmitted to the sealed glass part of the lead. There is no insertion or fitting work required for assembly, and it is a simple bending work, making it easy to automate.

In addition, the heat receiving surface becomes a flat and wide surface, and heat is received evenly.

This invention is highly reliable, easy to handle, and suitable for mass production.
This is an excellent idea that can provide an inexpensive radial type temperature switch.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of an assembly of a conventional axial type temperature switch, and FIG. 2 is an exploded view of the same. FIG. 3 is an exploded perspective view showing one embodiment of the present invention, FIG. 4 shows its assembled state, and FIG. 5 is a perspective view of another embodiment. S...Temperature switch body, 1...Reed switch, 2...Lead, 3...Leader wire, 4...Connection part, 5...Fixed pipe, 6...Heat receiving plate, 5-1...Groove, 7-
1.7-2...Semi-cylindrical part, 8.8-1.8-2
...Mounting allowance, 9゜9-1.9-2...
...Installation is by hole, 10...notch, 11, tapping.
Notch.

Claims (1)

[Scope of utility model registration request] A temperature switch main body consisting of a permanent magnet, a temperature-sensitive ferromagnetic material, and a reed switch having these fixed to the outer periphery; a lead wire connected to each lead of the reed switch;
It consists of a fixed tube fitted into both ends of the reed switch while covering the connection part, a cylindrical part for inserting and fixing the temperature switch main body and the fixed tube, and a heat receiving plate having a mounting allowance for installation. In the temperature switch, the fixed tube is provided with an axial cut groove for drawing out the lead wire in the radial direction, and the heat receiving plate has semicylindrical portions formed at both ends of the single plate, and is called an amphibian cylindrical portion. The above-mentioned cylindrical part is constructed by bending the central part so as to match and overlapping them to form the above-mentioned cylindrical part, and the remaining overlapping part forms the above-mentioned mounting margin. A circumferential notch is provided in the corresponding portion, so that the temperature switch main body and the fixed tube are built into the cylindrical portion by fitting the semi-cylindrical portion, and the lead wire is connected to the cut groove of the fixed tube. A temperature switch characterized in that the temperature switch is pulled out in a radial direction through a notch in the semi-cylindrical part.