JPS5846503Y2 - Thermo plug in electric cooker - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a thermo plug in an electric cooker.

Conventionally, a thermo plug has been used to attach a power cord to an electric cooker.

This thermo plug is equipped with a terminal pin receiver for supplying electricity to the electric heating element of the electric cooker body, as well as a thermodetector and adjustment head for arbitrarily setting the temperature of the electric cooker. .

Since the thermo plug body is usually molded from synthetic resin, when the thermo plug is inserted into the terminal pin of the electric cooking device, conduction will occur from the overheated terminal pin and its brim to the terminal holder. The entire thermo plug will overheat.

As a result, the thermoplug deteriorates due to overheating, causing failure, and also affects the thermostat, making it difficult to perform complete temperature adjustment.

Therefore, in the past, the entire end face of the thermoplug body on the terminal pin side was configured as a ceramic insertion end to prevent overheating of the thermoplug.

However, the insertion end made of ceramic has the disadvantage that it is extremely difficult to form a hole, resulting in poor dimensional accuracy and, furthermore, an increase in weight, which causes inconvenience in use.

In view of the above points, the present invention eliminates problems such as poor dimensional accuracy and increased weight by using a pair of ceramic insulators only in the terminal pin receiver where the terminal pins come into direct contact. The purpose is to improve productivity and provide high quality thermo plugs.

Hereinafter, specific examples of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a diagram showing how the thermo plug according to the present invention is used.

In the figure, reference numeral 1 indicates a thermoplug as a whole, a power cord 2 is connected to its right end, and a terminal pin 4 of a cooking device main body 3 is inserted to its left end.

Reference numeral 5 denotes a mounting device for the thermoplug 1 in the cooking device main body 3, which is composed of a washer 6, a terminal cover 7, and the like.

The terminal cover 7 has a horizontal rectangular cylindrical shape, and the upper side 7
It has a shape in which the back part a is cut out, and the lower side 7b and side side 7C extend to the back part.

The thermoplug 1 is composed of upper and lower cases la and lb made of, for example, black phenol resin.
A thermoadjustment heir is provided on the upper surface of the upper case 1a.

As shown in FIGS. 1 and 2, a pair of terminal pin supports 9 made of steatite are fitted into the upper and lower cases on the terminal pin side.

The terminal pin holder seat 9 is as shown in Fig. 3A-C.
A hole 10 into which the terminal pin 4 can be inserted and a stepped portion 11 having a larger diameter than the hole 10 are formed in the center, and a protruding portion 12 extending in the left-right direction is provided on the inner side of the upper and lower cases la, lb. are provided and fitted by the upper and lower cases 1a and lb.

Reference numeral 14 denotes a protrusion formed in the width direction of the -L case 1a for regulating the insertion position of the thermoplug 1, and abuts against the opening edge of the upper side 7a of the terminal cover 7.

In addition, the terminal receiver seat 9 has a fitting groove on its outer periphery instead of the left and right protrusions 12, and the upper and lower cases la, lb
It is also possible to fit and fix it to prevent it from coming off.

In addition, although the terminal pin receiver seat 9 of this specific example has a configuration in which its end surface protrudes from the end surface of the thermo plug case 1 as shown in FIG. They may be configured as one, and in this case, heat dissipation from the terminal pins 3 is further improved.

Next, the operation of the thermoplug 1 configured as described above will be explained.

First, the thermo plug 1 is inserted into the terminal cover 7 so as to be fitted onto the terminal pin 4.

In this case, the terminal pin receiver is placed on the collar of the terminal pin 4 so that the protrusion 14 of the thermo plug 1 abuts against the opening edge of the upper side 7a of the terminal cover 7 before the end surface of the seat 9 abuts. The relationship is set so that the collar of the terminal pin 4 and the terminal pin receiver do not come into contact with the seat 9.

Next, when the electric heating element of the cooker is energized and the cooker main body 3 is heated, the heat is conducted to the terminal pin 4.

However, due to the presence of the seat 9, the conduction heat of the terminal pin receiver is blocked, and the thermoplug 1 is not heated.

As described above, according to the present invention, a pair of heat-insulating and heat-resistant terminal pin holders each having a hole into which a terminal pin can be inserted is formed at the end of the thermo-plug case, and a seat is fitted into the terminal pin holder, Since the projection for regulating the insertion position is formed on the upper surface of the case, it is possible to prevent heat dissipation from the terminal pin and overheating deterioration due to heating of the terminal receiving part of the thermoplug.

The center distance between the seats of the terminal pin receiver, which needs to match the center distance between the pair of terminal pins, depends on the dimensional accuracy of the upper and lower cases, and the dimensional accuracy can be easily maintained.

That is, the upper and lower cases are usually resin molded using precision molds.

Furthermore, compared to the conventional structure in which the entire end surface on the terminal pin side is made of ceramic, the weight is significantly reduced, so there is no inconvenience in use.

[Brief explanation of drawings]

Figure 1 is a usage diagram of the thermo plug according to the present invention, Figure 2
The figure is a view taken along the line II-II in FIG. 1, FIG. 3A is a front view showing an example of the terminal pin receiver seat, and FIG. FIG. 3C is a longitudinal sectional view taken along the line CC in FIG. 3A. 1... Thermo plug, 3... Cooker body, 4... Terminal pin, 9... Terminal pin holder is seat, 10... - Hole.

Claims (1)

[Scope of utility model registration request] A pair of insulating terminal pin holders, which have a hole into which a terminal pin can be inserted, are formed at the ends of the split type resin thermo plug case, and a seat is fitted into the pair, and the width of the upper surface of the upper case of the thermo plug case is fitted. A thermo plug for an electric cooker that has a protrusion formed in the direction of the opening edge of the terminal cover to restrict the insertion position.