JPH0637597Y2 - Cooker heat sensitive device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of use] The present invention relates to an improvement of a heat-sensitive device for detecting the temperature of a cooking plate to be heated. The structure of the sensing fitting for transmitting the temperature to the heat-sensitive element is improved to a structure that reduces the material cost and the processing cost.

[Conventional technology]

As a conventional technique relating to a heat sensitive device for detecting the temperature of a cooking plate to be heated, there is a technique described in Japanese Utility Model Laid-Open No. 62-199013.

According to this technique, as shown in FIG. 7, the lead wires 2 are connected to both ends of the heat sensitive element 1, and the lead wires 2 are connected to the electrically insulating tube 3
And the electric insulating tube 3 is inserted into the hole 6 provided in the small diameter portion 5 of the heat sensitive plate 4.

As shown in FIG. 6, the inserted electrically insulating tube 3 is bent in a substantially right-angled direction, and both ends of the lead wire 2 are connected to a temperature control section provided in the cooker body.

The heat sensitive plate 4 is provided with a large diameter portion 7 on the side that comes into pressure contact with the cooking plate, the inner case 9 is fixed to the large diameter portion 7 via a fixing ring 8, and the electrical insulating tube 3 is directly attached to the cooking plate or the like. Protects against exposure to radiant heat.

Therefore, the outer diameter dimension d ₁ of the large diameter portion 7 must be larger than the outer dimension l of both bent portions of the electrical insulating tube 3 penetrating the hole 6 of the small diameter portion 5, and thus the outer diameter dimension of the small diameter portion 5 It is considerably larger than d ₂ , and when manufacturing the heat-sensitive plate 4, since the small diameter portion 5 is turned from a material having an outer diameter dimension capable of turning the large diameter portion 7, the material cost is high. And there is a drawback that the cutting time becomes long.

FIG. 3 is a vertical cross-sectional view of a heat-sensitive device showing another conventional example, in which a flange portion 12a of a guide tube 12 formed in a silk hat shape is fixed to an upper portion of a holder 11 fixed to a cooker body 10. It

A hole is provided in the center of the cover portion 12b which is the upper part of the guide tube 12, and the sensing metal fitting 13 is inserted into this hole so that the sensing metal fitting 13 can be retracted and retracted, and the spring 14 inserted between the sensing metal fitting 13 and the holder 11 senses the metal fitting. 13 is biased upward, and a large-diameter portion 13a provided around the middle portion of the sensing metal fitting 13 slides on the inner surface of the guide tube 12 and the outer bottom surface of the cooking plate 15 placed on the cooker body 10. The sensing metal is pressed into contact with.

The small-diameter portion 13b formed below the large-diameter portion 13a is provided with the hole 6, and the electrically insulating tube 3 for covering the heat-sensitive element and the lead wire 2 is inserted into the hole 6 and, as shown in FIG. Be bent into.

Then, the lead wire 2 is connected to the temperature control unit provided in the cooker body 10.

Since the lateral dimension l of the bent electrical insulating tube 3 must be smaller than the outer diameter dimension d ₃ of the large diameter portion 13a, the outer diameter dimension d ₄ of the small diameter portion 13b is smaller than that of the large diameter portion 13a. It gets smaller.

In order to manufacture the sensing fitting 13, as shown in FIG.
The range indicated by the one-dot chain line must be turned, which has the drawback that the material cost is high and the cutting time is long, as in the case of the above-described conventional example.

The present invention aims to solve such a problem.

[Means for Solving the Problems]

In order to achieve the above object, in the heat-sensitive device of the present invention, a groove is provided around the sensing fitting instead of providing a large diameter portion, and an E-shaped retaining ring is fitted in the groove to guide the E-shaped retaining ring. It was slidably fitted into the cylinder.

[Action]

The sensing fitting can be made of a material having a size close to that of the small diameter portion, and the amount of turning is extremely small.

The E-shaped retaining ring fitted in the groove is slidable on the guide tube, so that the sensing metal retains the function of smoothly sliding along the guide tube and press-adhering to the cooking plate.

〔Example〕

 Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a vertical cross-sectional view of a heat-sensitive device, and FIG. 2 shows a vertical cross-sectional view of a cooker provided with the heat-sensitive device.

The same parts as those in the conventional example are designated by the same reference numerals.

The holder 11 is fixed to the cooker main body 10, and the flange portion 12a of the guide tube 12 is fixed to the upper portion of the holder 11 so that the guide tube 12
It is similar to the conventional example that the sensing fitting 16 is provided in the hole provided in the cover portion 12b so as to be retractable.

The sensing fitting 16 has a cylindrical shape, a groove 17 is provided around the outer peripheral surface of the middle, and an E-shaped retaining ring 18 fitted in the groove 17 is slidably inserted into the guide tube 12.

A step portion 19 for receiving a spring is provided around the lower end surface of the sensing fitting 16,
The spring 14 is inserted between the step portion 19 and the holder 11.

Therefore, the sensing fitting 16 can be raised until the E-shaped retaining ring 18 hits the cover portion 12b, and comes into pressure contact with the outer bottom surface of the cooking plate 15 placed on the cooker body 10.

When the heater 20 (see FIG. 2) provided in the cooking plate 15 is energized to heat the cooking plate 15, the temperature of the cooking plate 15 is transmitted to the sensing metal fitting 16 which is in pressure contact, and the heat is sensed through the electrically insulating tube 3. Although transmitted to the element, the electric insulating tube 3 and the lead wire 2 are not directly exposed to radiant heat, and the temperature of the cooking plate 15 is accurately transmitted to the temperature control unit.

Reference numeral 21 is a heat shield plate.

As described above, the sensing fitting 16 that presses against the cooking plate 15 and transmits the temperature of the cooking plate 15 to the heat-sensitive element may have an outer diameter dimension similar to that of the small diameter portion 13b shown in the conventional example, so that a small material is used. It can be manufactured, and the amount of turning is extremely small, and the processing time can be greatly reduced.

[Effect of device]

Since the present invention is configured as described above, the manufacturing cost of the sensing fitting can be significantly reduced without degrading the function of the heat sensitive device.

[Brief description of drawings]

1 and 2 show an embodiment of the present invention, FIG. 1 is a vertical sectional view of a heat-sensitive device, FIG. 2 is a vertical sectional view of a cooker equipped with the heat-sensitive device, and FIG. 3 is a conventional example. FIG. 4 is a vertical cross-sectional view of the heat-sensitive device shown in FIG. 4, FIG. 4 is a perspective view of the sensing metal fitting used in the heat-sensitive device of the above, FIG. FIG. 7 is a vertical sectional view of the heat-sensitive device, and FIG. 7 is a perspective view of the heat-sensitive plate of the heat-sensitive device and the assembly parts thereof. 1 ... Thermal element, 2 ... Lead wire, 3 ... Electrically insulating tube,
6 ... hole, 10 ... cooker body, 11 ... holder, 12 ... guide tube,
13 ... Sensing bracket, 13b ... Small diameter part, 14 ... Spring, 15 ... Cooking plate, 1
6 ... Sensing metal fittings, 17 ... Groove, 18 ... E-shaped retaining ring.

Claims (1)

[Scope of utility model registration request] 1. An electric device for pressing a sensing fixture biased toward the cooking plate onto a cooking plate placed on a cooker body and heated by a heating element, and covering a hole provided in the sensing fixture with a heat-sensitive element. Insert an insulating tube, fit an E-shaped retaining ring into the groove provided around the sensing fitting, and slidably fit the E-shaped retaining ring into a guide tube having an axis in the biasing direction of the sensing fitting. A heat-sensitive device for a cooker characterized by being inserted.