JPS604522Y2 - thermal sensor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting structure for a heat-sensitive actuator in a thermal sensor.

Conventionally, when installing a heat-sensitive actuating body in a thermal sensor, the heat-sensitive actuating body is generally temporarily fixed to the base of the sensor with adhesive.
After that, adhesive is filled from the ceiling mounting surface side of the base to hold it fixed.

In such a conventional mounting structure, temporary fixing is performed using adhesive, which takes time to solidify, thus making it easier to move on to the next final fixing operation.

However, since the bonding process requires two steps as described above, it has the disadvantage of poor workability.

Furthermore, in conventional sensors in which adhesive is filled into the through-hole of the base and the heat-sensitive actuator is fixedly held, the adhesive sometimes flows out to the heat-sensitive plate side of the heat-sensitive actuator. However, when this solidifies and adheres to a heat-sensitive plate, the heat of the heat-sensitive plate is dissipated by the adhesive, resulting in poor sensitivity.

On the other hand, there are some thermal sensors, such as the one disclosed in Japanese Utility Model Publication No. 44-10901, which have a structure in which the lead wire is connected to a terminal plate to temporarily secure the thermally actuating body, but in this structure, This method requires a process for connecting the lead wires to the terminal plate, which poses problems in terms of workability, and it also requires a large amount of adhesive for the through holes, which is uneconomical.

The present invention was developed in view of the above points, and it improves workability by adopting a fitting method for fixing the base plate of the heat-sensitive actuator, and reduces the amount of adhesive used for final fixing, making it economical. It is an object of the present invention to provide a thermal sensor in which a heat-sensitive actuating member can be securely and easily fixed and held without causing poor sensitivity due to heat radiation.

Hereinafter, the present invention will be explained based on an embodiment shown in the drawings.

FIG. 1 is a front view of a sensor according to the present invention, and FIG. 2 is a sectional view taken along the line XX in FIG. The heat-sensitive actuating body 2 is fixedly held on the base 3 by fitting and temporarily fixing it into a provided mounting portion 4 and filling a predetermined portion with adhesive A.

As shown in FIGS. 3 and 4, the heat-sensitive actuating body 2 is provided with a temporary fixing part 5, and conductive terminals 6, 6 are provided protruding from the temporary fixing part 5.

This temporary fixing part 5 is a cylindrical body integrally formed with the operating body main body 7, and is a fitting part 9 (seventh and eighth
The heat-sensitive actuating body 2 is fixed to the base plate by engaging and fitting the heat-sensitive actuating body 2 to the base plate.

The conduction terminal 6 is connected to a heat-responsive body (not shown) such as a bimetal element incorporated in the operating body main body 7, and is provided to protrude from the temporary fixing part 5, and is attached to the base during the above-mentioned temporary fixing. It is inserted into a loose fitting hole 10 (FIGS. 7 to 9) provided in the fitting part 9 of the part 4.

Further, in this embodiment, a guide pin 8.degree. 8 is provided protruding from the actuator main body 7 so that the above-mentioned fitting of the temporary fixing portion 5 can be easily performed.

The shape of the temporary fixing part 5 is not limited to the elliptical cylindrical body shown in FIGS. 3 and 4, but may be circular as shown in FIG. It may be of any type or shape.

The mounting portion 4 is for holding the heat-sensitive actuator 2, and is provided at the center of the base 3, as shown in FIG.

The mounting portion 4 is provided with a fitting portion 9 corresponding to the temporary fixing portion 5 and a loose fitting hole 10 through which the conduction terminal 6 is inserted.

As shown in FIGS. 2, 7, and 8, which is a Y-Y cross-sectional view of FIG. Then, the temporary fixing portion 5 is engaged and fitted thereto.

In this embodiment, the fitting portion 9 has an elliptical shape as shown in the figure.

As shown in FIGS. 7 to 9, the loose fitting hole 10 is
It is formed into a rectangular shape that is slightly larger than the cross-sectional shape of the conductive terminal 6, and is provided at an appropriate position in the groove portion 11.

Furthermore, a guide hole 12 for the guide pin 8 of the heat-sensitive actuator 2 is bored in the mounting portion 4 of the base 3 .

Note that the shape, structure, etc. of the fitting portion 9 are not limited to those described above, and may be any shape as long as it can engage and fit the temporary fixing portion 5 having an arbitrary shape.

Next, the work order for fixing and holding the heat-sensitive actuating body 2 to the base 3 will be explained. First, the conductive terminals 6, 6 are inserted into the loose fitting holes 10, 10, and then the temporary fixing parts 5, 5 are inserted into the fitting part 9. , 9.

At this time, since the guide pin 8.8 is inserted into the guide hole 12.12, the temporary fitting part 5 can be easily fitted.
Moreover, the operating body 2 can be accurately aligned with respect to the base 3.

When temporarily fixed in this way, the heat-sensitive actuating body 2 is held on the base 3, but in order to further strengthen this holding and prevent water droplets from entering from the outside, Fill the fitting holes 10.10 with adhesive A from the ceiling mounting surface side of the base 3.

The purpose of filling the adhesive A can be achieved by filling the loose fitting hole 10, so that there is no need for a large amount of adhesive as in the conventional case.

Thus, the assembly work of the heat-sensitive actuating body 2 is completed,
After that, when the adhesive A solidifies, the actuating body 2 can be held fixed even more reliably.

As explained above, the present invention provides a temporary fixing part and a conductive terminal on the heat-sensitive actuating body, and correspondingly provides a fitting part and a loose fitting hole on the base, and after temporarily fixing the fitting, the loose fitting hole is inserted. The thermosensitive actuator is fixed and held on the base by filling with adhesive, so there is no need for adhesive for temporary fixing, making it easy to use.
The temporary fixing work can be done reliably and within a short time, and the temporary fitting part is tightly attached and the adhesive does not flow out to the heat sensitive plate side, thus eliminating the heat dissipation effect of conventional adhesives. This will not cause poor sensitivity.

Furthermore, as mentioned above, since the structure is such that the temporary fixation is firmly achieved by fitting, the heat-sensitive actuator can be installed in a fixed position when filling and solidifying the adhesive, and therefore the adhesion state of the adhesive can be maintained. This makes it possible to completely ensure that water droplets from outside enter the sensor.

[Brief explanation of drawings]

Fig. 1 is a front view of the sensor according to the present invention, Fig. 2 is a sectional view taken along the line XX in Fig. 1, Fig. 3 is a front view of the heat-sensitive actuating body used in the sensor of the present invention, and Fig. 4 is a sectional view taken along the line XX in Fig. 1. 3 is a plan view, FIGS. 5 and 6 are plan views showing other embodiments of the heat-sensitive actuating body, FIG. 7 is a front view of the base used in the sensor of the present invention, and FIG.
-Y sectional view, FIG. 9 is a z-2 arrow direction view of FIG. 1... Heat sensitive plate, 2... Heat sensitive actuating body, 3
...Base, 4...Mounting part, 5...
...Temporary fixing part, 6...Continuity terminal, 7...
Actuator main body, tail...guide pin, 9...fitting part, 10...loose fitting hole, 11...groove, 12...・Guide hole, A...Adhesive.

Claims (1)

[Scope of utility model registration request] A temporary fixing part is provided on the heat-sensitive actuator having a heat-sensitive plate, and a conductive terminal is provided protruding from the temporary fixing part, and the base has a fitting part corresponding to the temporary fixing part and a part for inserting the conductive terminal. a loose fitting hole is provided, the conductive terminal is inserted into the loose fitting hole, and the temporary fixing portion is engaged and fitted to the fitting portion of the base;
Thermal type, characterized in that the loose fitting hole is filled with adhesive from the ceiling mounting surface side of the base to fix and hold the heat-sensitive actuator on the base.