JPH0773021B2 - Sealed bimetal thermostat - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bimetal used in a refrigerator / freezer or the like.
Waterproof structure and easy installation are required. Hereinafter, a conventional bimetal cermet such as the above-mentioned refrigerator / freezer will be described with reference to the drawings. FIG. 5 shows the structure of a conventional bimetal thermostat such as a refrigerator and refrigerator. Reference numeral 1 is a thermostat having a switch section using a bimetal which is displaced by a snap action due to a temperature change, and a terminal section is a lead for external connection. The wire 2 is connected with solder or the like. Reference numeral 3 is a resin tube, and after the thermostat 1 is housed, both ends 4a and 4b are sealed by high frequency welding or the like.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In the bimetal thermostat having the above-described configuration, not only the outer shape of the tube 3 becomes large, but also the characteristics of the thermostat are changed due to the deformation of the terminal portion or the like due to an external force when the tube 3 is attached to a refrigerator or a refrigerator. There is a fear. Also, the air inside the tube 3 contracts during cooling, so that the lead wire 2
It has a drawback that it absorbs water from the inside and water enters the tube to short-circuit the switch. Further, the welding of the tube 3 and the lead wire 2 is not perfect, and it is necessary to re-seal with a solvent or the like, which requires a large amount of equipment because of adverse effects on the human body.

In view of the above-mentioned drawbacks, the present invention provides a bimetal thermostat that is small in size and is reliably insulated and sealed without being deformed by external force during mounting.

Means for Solving the Problems In order to solve the above problems, a bimetal thermostat such as a refrigerator and a refrigerator of the present invention has a thermostat in a substantially cylindrical resin housing having a partition plate integrally formed at one end through a thin portion. , The lead wire connected to the terminal of the thermostat is pulled out from the cylindrical surface of the housing, the partition plate is bent at the thin portion, and the projection provided at the tip of the partition plate and the corner provided on the housing. It is configured such that it is engaged with the hole and the opening of the housing is sealed with a molding material and cured.

The present invention has the above-described configuration, the thermostat is inserted in the housing, the partition plate is bent and fixed between the terminals of the thermostat and between the lead wires, and the thermostat is sealed and hardened with the molding material, so that the size is small. Since there is no deformation due to external force during mounting, a reliable insulation seal is possible with simple assembly.

EXAMPLE A bimetal thermostat for a refrigerator and a refrigerator according to an example of the present invention will be described below with reference to the drawings.

FIGS. 1, 2, 3, and 4 show a bimetal thermostat 5 for a refrigerator-freezer or the like according to an embodiment of the present invention, in which a bimetal which is displaced by snap action due to temperature change is used. A thermostat 7 having a switch portion is a substantially cylindrical resin housing having a partition plate 9 integrally formed at one end via a thin portion 8, and a projection 10 is provided at the tip of the partition 9. The cylindrical surface of the housing 7 is provided with round holes 11 and 11 'through which the external connection lead wires 12 and 12' can be inserted.
Are connected to terminals 13 and 13 '. The partition plate 9 of the housing 7 is bent at the thin portion 8, and in a state of being in contact with the bottom surface 14 of the thermostat 6, the projection 10 at the tip of the partition plate 9 and the square hole formed in the cylindrical surface of the housing 7 Engaged with 15.

The thermosensitive member 16 of the thermostat 6 and the housing 7 are press-fitted and fixed.

The opening of the housing 7 is sealed with a molding material 17 and cured.

As described above, according to the bimetal thermostat of the refrigerator and refrigerator of this embodiment, the external connection lead wires 12 and 12 'are inserted into the round holes 11 and 11' of the housing 7 and connected to the terminals 13 and 13 'of the thermostat 6. After that, the thin portion 8 of the housing 7 is bent, and the projection 10 of the partition plate and the square hole 15 of the housing 7 are engaged with the partition plate 9 and the bottom surface 14 of the thermostat 6 in contact with each other, so that the thermostat 6 can be easily positioned. In addition, the insulation between terminals can be improved.

After that, the opening of the housing 7 is sealed and hardened by the molding material 17, so that it is small in size and is not deformed by an external force at the time of mounting.
Hardening is obtained such that a reliable insulating seal is possible.

As described above, according to the present invention, a thermostat having a switch part using a bimetal which is displaced by a snap action due to a temperature change is provided in a substantially cylindrical resin housing having a partition plate integrally formed through a thin part. The housing, bend the thin-walled part of the housing, engage the square holes of the partition housing with the partition plate and the bottom of the thermostat in contact with each other between the terminals, and seal the opening of the housing with the molding material. This makes it possible to easily position the thermostat and improve the insulation between the terminals. Also, because it is small and has a simple structure that does not deform due to external force during mounting,
The large-scale equipment required for assembly is not necessary, and a sealed bimetal thermostat capable of performing a reliable insulating seal can be supplied, which is a great effect.

[Brief description of drawings]

1 is a perspective view of a sealed bimetal thermostat according to an embodiment of the present invention, FIG. 2 is a sectional view of a sealed bimetal thermostat according to an embodiment of the present invention, and FIG. 3 is a view of the present invention of FIG. FIG. 4 is an exploded perspective view of the hermetically sealed bimetal thermostat according to one embodiment of the present invention, and FIG. 5 is a structural diagram of a conventional bimetal thermostat such as a refrigerator-freezer. Is. 6 ... Thermostat, 7 ... Housing, 8 ... Thin part, 9 ... Partition plate, 10 ... Protrusion, 11, 11 '... Round hole, 12,
12 '... Lead wire, 13,13' ... terminal, 14 ... bottom, 15
…… Square hole, 16 …… Heat sensitive material, 17 …… Mold material.

Claims (1)

[Claims] 1. A thermostat having a switch part using a bimetal which is displaced by a snap action due to a temperature change, a substantially cylindrical resin housing having a partition plate integrally formed at one end with a thin part, Consisting of a lead wire for external connection attached to the terminal of the thermostat, insert the thermostat into the housing,
Pulling out the lead wire from the cylindrical surface of the housing,
The partition plate is bent at a thin portion, and the projection provided at the tip of the partition plate is engaged with a square hole provided in the housing, and the opening of the housing is sealed with a molding material and cured. Sealed bimetal thermostat.