JPS5846761Y2 - Temperature sensing device for heating appliances - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a temperature sensing device used as a center thermo in a heating appliance that electrically performs boiling, boiling, roasting, etc.

Generally, in a heating appliance, for example, a rice cooker, as shown in FIG.
A rice cooker 4 is placed on the heat radiation plate 2, and rice, etc. in the rice cooker 4 is cooked by energizing the heater 3.

In order to stop energizing the heater 3 after rice cooking is finished, a temperature sensing device 5 is provided at the center of the heat sink 2 to sense the temperature of the rice cooker 4 at the end of rice cooking.

Reference numeral 6 is an operating lever for a rice cooking switch, 7 is an operating lever for winding a cord reel (not shown), and 8 is an operating lever operated by operating the operating lever 6.

A conventional temperature sensing device 5 has a structure shown in FIG.

That is, while the temperature-sensitive magnetic body 11 is attached to the center of the lower surface of the upper lid 10 of the casing 9, the temperature-sensitive magnetic body 11 is attached at a position facing the temperature-sensitive magnetic body 11 inside the casing 9 in the direction away from the temperature-sensitive magnetic body 11 with a spunong 16. A biased magnet 12 is provided.

The magnet 12 is a spring receiver 15 for a spring 16.
An operating rod 19 connected to the operating lever 8 is attached to the lower surface of the spring receiver 15.

By pushing up the operating rod 19, the magnet 12 is moved against the biasing force of the spring 16 and the temperature-sensitive magnetic body 11 is
At the end of rice cooking, the rice cooking switch is turned OFF by sensing the high temperature of the rice cooker 4 and separating the magnet 12 from the temperature-sensitive magnetic body 11 which has lost its magnetism by the biasing force of the spring 16. It has become.

However, in the conventional temperature sensing device, since the magnet 12 is supported only by the spring 16 within the casing 9, there is a risk of it swinging.

For this reason, as shown by the dotted line in FIG. 2, there is a risk that the magnet 12 and the temperature-sensitive magnetic body 11 may come into incomplete contact with each other, resulting in malfunction.

Additionally, a spring receiver 15 is provided to prevent the magnet 12 from swinging.
If the gap S' between the casing 9 and the casing 9 is made small, there is a problem in that friction is generated between the inner circumferential surface of the casing 9 and the casing 9 during operation, resulting in malfunction.

The purpose of the present invention is to solve the above-mentioned problems and provide a temperature-sensing device with stable operation. The temperature sensing device will be explained.

In this temperature-sensing device 5, a temperature-sensitive magnetic body 11 is provided at the center of the lower surface of the upper lid 10 of the casing 9, and a sliding shaft 1 extends through the center of the temperature-sensitive magnetic body 11 to the inner bottom of the casing 9.
3 is installed.

The temperature-sensitive magnetic body 11 has magnetism below a predetermined temperature,
It has the property of rapidly losing its magnetism when the temperature exceeds a predetermined temperature.

On the other hand, in the casing 9, a magnet 12, which is disposed at a position facing the temperature-sensitive magnetic body 11 and biased in a direction away from the temperature-sensitive magnetic body 11 by a spring 16, has a magnet 12 that penetrates through its center. The sliding pipe 1 extends outside the casing 9.
4 is provided.

The sliding tube 14 replaces the operating rod in the conventional example.

The magnet 12 serves as a spring receiver 1 for the spring 16.
A sufficient gap S is formed between the outer periphery of the casing 5 and the inner periphery of the casing 9.

Thus, the sliding shaft 13 can be inserted into the sliding tube 14, and the magnet 12 can be moved up and down along the sliding shaft 13 without swinging. It is designed to be able to move up and down.

Further, the sliding shaft 13 and the sliding tube 14 are made of a material with low sliding resistance, such as stainless steel, in order to smoothen mutual sliding.

Incidentally, reference numeral 17 denotes an outer case for attaching the temperature sensing device 5 to the heat sink 2, and a casing 9 is elastically supported within the outer case 17 by a spring 18.

Next, to explain the action of the temperature sensing device shown in the figure, when turning on the rice cooking switch, the operating lever 6 is operated downward, and the operating lever 8 operated by this operation moves the sliding tube 1
4 is pushed up, and the magnet 12 is attracted to the temperature-sensitive magnetic body 11 against the biasing force of the spring 16 (as shown by the dotted line).

At the end of rice cooking, the temperature-sensitive magnetic body 11 becomes high temperature and loses its magnetism, so the magnet 12 is pushed down by the biasing force of the spring 16 and returns to the state shown by the solid line, and the rice cooking switch is turned off.

At this time, as the sliding tube 14 moves up and down along the sliding shaft 13, the magnet 12 is displaced without swinging and facing the temperature-sensitive magnetic body 11.

Therefore, malfunctions due to incomplete contact between the temperature-sensitive magnetic body 11 and the magnet 12 can be prevented.

Next, the effects of the temperature sensing device of the heating device of the present invention will be listed below.

That is, according to the present invention, (1) a sliding shaft 13 is provided in the center of the casing upper lid 10 and extends downward through the temperature-sensitive magnetic body 11; A sliding tube 14 is provided in the center of the installed magnet 12 and extends outside the casing 9 by passing through it, and the sliding shaft 13 is inserted into the sliding tube 14.
Since the magnet 12 is displaced while sliding the sliding tube 14 along the sliding shaft 13, the magnet 12 is always displaced facing the temperature-sensitive magnetic body 11. (2) With the sliding shaft 13 inserted into the sliding tube 14, the magnet 1
(3) There is no need to position the magnet 12, which simplifies the assembly of the temperature sensing device and reduces costs. Since a sufficient gap S has been formed, the magnet 12
This has practical effects such as eliminating the possibility of friction occurring between the casing 9 and the casing 9 due to the displacement of the casing 9, resulting in smooth operation.

[Brief explanation of drawings]

FIG. 1 is a partially sectional side view of a general rice cooker, FIG. 2 is a vertical sectional view of a conventional temperature sensing device, and FIG. 3 is a vertical sectional view of a temperature sensing device according to an embodiment of the present invention. 9...Casing, 10...Top lid, 1
1...Temperature-sensitive magnetic material, 12...Magnet, 1
3...Sliding shaft, 14...Sliding pipe, 16
...Spring, S...Gap.

Claims (1)

[Scope of utility model registration request] A temperature-sensitive magnetic material 11 is placed in the center of the lower surface of the upper lid 10 of the casing 9.
and a sliding shaft 13 penetrating the center of the temperature-sensitive magnetic body 11 and extending downward. A magnet 12 biased by a spring 16 in a direction away from the casing 9 is disposed such that a sufficient gap S is formed between the magnet 12 and the casing 9, and a magnet 12 is provided in the center of the magnet 12 with a magnet 12 that passes through the magnet 12. A temperature sensing device for a heating appliance, characterized in that a sliding tube 14 is provided extending outside the casing 9, and the sliding shaft 13 can be inserted into the sliding tube 14.