KR200383376Y1 - A switch used in a heat sensor equipment for electric rice cooker - Google Patents

Abstract

The present invention relates to an anti-leak switch of a temperature sensing device for an electric rice cooker, the anti-leak switch of the present invention can be more securely interrupted contact with the mobile terminal by a protruding piece formed on the fixed terminal can reduce the occurrence of malfunction. It relates to an air deflection switch of a temperature sensing device for an electric rice cooker.

Description

Anti-air switch of temperature sensor for rice cooker {A SWITCH USED IN A HEAT SENSOR EQUIPMENT FOR ELECTRIC RICE COOKER}

The present invention relates to a temperature sensing device for an electric rice cooker, and more particularly, having a protruding piece projecting inward to a fixed terminal guide into which the fixed terminal is inserted into the actuator, so that the contact portion slips between the fixed terminal and the mobile terminal. It is possible to reliably ensure the electrical contact by the slide contact by contacting while removing the dust and the like, and thereby relates to the anti-air switch of the temperature sensing device for an electric rice cooker which can reduce the possibility of malfunction.

In general, the electric rice cooker is to cook using a heat source generated by the electric heater, and the automatic temperature control device connected to the electric heater to automatically switch the function to cooking / warming or to maintain the proper temperature of the selected function have.

The thermostat is equipped with a thermistor which is a temperature sensor, when the heating element such as a pot placed inside the rice cooker exceeds a certain temperature, the internal control device controls it so that it is not heated anymore, or adjusts the temperature. It is used to lower. Specifically, when the temperature of the electric rice cooker using the thermistor reaches a set temperature (about 140 ° C.), the resistance of the thermistor is converted and the heater is turned off by the operation of the electronic circuit as a control device, thereby switching to the warming function. .

However, the conventional thermostat for an electric rice cooker as described above has problems such as low stability in operation, lack of heat resistance to heat, cumbersome manufacturing process, and productivity.

Conventional technology for solving the above problems include the "temperature control switch of the rice cooker" and the Korean Utility Model Publication No. 20-0238972 disclosed in the Republic of Korea Utility Model Publication No. 1993-0018925 filed by the applicant of the present application "Thermostats for electric rice cookers" disclosed in the call.

The present invention is an improvement of the above technique, and the existing fixed terminal is fixed to the fixed terminal guide recess formed in the actuator in the horizontal direction, the contact portion when the mobile terminal is interrupted with the fixed terminal by the vertical movement The narrow contact is not achieved, and the contact method is incomplete due to the dust or the like in the working process or the operating state, and thus there is a problem in operation because the signal is not transmitted to the internal electronic circuit.

The present invention was devised to solve the above-mentioned conventional problems, and an object of the present invention is to further include a protruding piece protruding inward from the guide of the fixed terminal in the fixed terminal contacting the mobile terminal. The present invention provides an anti-air switch of a temperature sensing device for an electric rice cooker capable of reliably intermittent according to a set temperature and providing reliability to a product.

The object of the present invention as described above, the case 3 is provided on the case holder 1 by the external elastic member 2 is installed, the actuator 5 and the insulating guide 4 inside the case. Is a temperature sensing device for an electric rice cooker, which is installed in a coupled state and senses temperature by a heat sensing sensor attached to the conducting plate 6 and the conducting plate, which are coupled on the case, wherein the actuator comprises: A mobile terminal coupled to the heat detection sensor and a support rod 9 which is elasticized by the internal elastic member 10 and coupled to the support rod 9 installed in the through hole 44 of the insulation guide and shorted with the fixed terminal ( 7), wherein the fixed terminal includes a fixed terminal piece 81 connected to the mobile terminal and a fixed terminal guide 82 fitted to the actuator, wherein the fixed terminal guide is bent over the fixed terminal piece. The projecting piece 83 protruded in the It is achieved by the anti-air switch of the temperature sensing device for an electric rice cooker.

In addition, the protruding piece may be achieved by bending the fixed terminal guide by partially bending the cut portion to the inside to achieve the object of the present invention.

Hereinafter, with reference to the accompanying drawings, the anti-air switch of the temperature sensing device for an electric rice cooker according to the present invention that can be carried out specifically to the object described in detail the configuration and the embodiment as follows.

1 is an exploded perspective view of a switch for preventing air of a rice cooker according to the present invention, the temperature sensing device is a thermistor, case (3), conduction plate (6), insulation guide (4), actuator (5) ), The mobile terminal (7), the fixed terminal (8), the support bar (9) and the inner and outer elastic members (2, 10) is assembled, and is fixed to the case holder (1) formed in the form of a plate.

The case (3) accommodates the components constituting the temperature sensing device and is coupled to the inner and outer elastic members (2, 10) to be driven by the load of the heating element (inner pot) to operate the thermistor, the case (3) It is formed in a cylindrical shape of the upper and lower portions to be inserted into the outer elastic member 2 formed in a circular shape, the lower end of the case 3 of the insulating guide 4 is placed in the interior of the case 3 A pedestal 31 bent inwardly to support the lower portion is formed to have a predetermined length, and the case 3 is inserted into the fixture 12 formed in the case holder 1 as the lower portion of the pedestal 31. Support leg 32 is formed.

The conductive plate 6 has a circular plate which is coupled to the upper part of the case 3 and positioned in the upper part of the present invention and is in contact with the bottom surface of the object to be heated. The lower surface of the conductive plate 6 protects the thermistor from overheating and the metallic case ( Heat-resistant sheets made of heat-resistant silicone may be additionally placed to block the short circuiting phenomenon in advance.

Insulation guide (4) is for supporting the support bar (9) coupled to the actuator (5) to operate the mobile terminal (7), the side wall 42 having a curved surface to be inserted into the case (3) both sides A bottom surface 43 is formed between the side walls 42 to support the bottom of the coupled actuator 5, and the support rod 9 penetrates in the center of the bottom surface 43. A ball 44 is formed. At this time, the flange 41 extending in the outward direction is formed at the upper end of the side wall 42 to have a right angle with respect to the longitudinal direction of the side wall 42 so that the insulating guide 4 is placed inside the case 3. When the flange 41 has a structure that is caught on the top of the case (3).

The actuator 5 fixes the thermistor, which is a thermal sensor, and fixes the fixed terminal 8 connected to the thermistor so that the movable terminal 7 which is driven by the internal elastic member 10 installed therein is fixed terminal 8. As a means for actuating the intermittent contact with each other), it is formed in a cylindrical shape so as to be inserted into the side wall 42 of the insulating guide 4, the coupling groove (55) for embedding the inner elastic member 10 in the lower center thereof. ) Is formed in a depression, and a fixing groove 51 for protecting the thermistor is formed at the center of the upper surface thereof, and both the lead wires and the fixed terminal 8 connected to both sides of the thermistor are electrically connected to both sides of the fixing groove 51. It is connected. The fixed terminal 8 has a fixed terminal insertion groove 52 for inserting the fixed terminal guide 82 is inserted.

In addition, the inner elastic member 10 is inserted into the coupling groove 55 formed in the lower portion of the actuator 5 and the mobile terminal 7 is vertically moved in the coupling groove 55 to fix the fixed terminal 8. The coupling groove 55 is formed to have a predetermined depth so as to be interrupted.

In addition, a flange 54 is formed in the upper circumferential direction of the upper protrusion 53 of the actuator 5 so that the flange 54 is coupled to the case 3 when the actuator 5 is coupled to the case 3. 3) It will have a structure that is caught on top.

The fixed terminal 8 includes a fixed terminal guide 82 which is a part to be fitted to the actuator, and a fixed terminal piece 81 which is bent inward from the top of the fixed terminal guide to be seated in contact with the mobile terminal. The fixed terminal piece includes a protruding piece 83 formed to protrude in a bent direction. Due to the structure of the protruding piece, even if the fixed terminal piece and the mobile terminal cause a poor contact, the protruding piece can reliably maintain the folding contact by removing dust or the like due to the sliding connection with the mobile terminal. Can be prevented in advance. As shown in FIG. 2, preferably, the protruding piece may be formed by partially cutting the fixed terminal guide itself and bending the partially cut portion in the bending direction of the fixed terminal piece. The object of the present invention can be achieved without processing such as bonding.

The mobile terminal 7 is a means for operating the thermistor by intermittent with the fixed terminal 8 fixed to the actuator 5, the mobile terminal 7 formed in a cylindrical shape is coupled to the support rod 9 to move The support rod 9 is a means for compressing the internal elastic member 10 such that the mobile terminal 7 is interrupted with the fixed terminal 8.

The thermistor is a temperature sensing sensor that is placed in the fixing groove 51 of the actuator 5 to measure the temperature of the heat conducted from the conducting plate 6 and senses heat by changing the resistance according to the temperature change. Lead wires extending in the form of conducting wires are formed on both sides of the wires to be electrically connected to the fixed terminals, and the ends of the lead wires are connected to internal electronic circuits by crimping connectors so that the signal of the thermistor Is transmitted to the electronic circuit.

Referring to the assembling process and the operating state of the anti-air switch of the electric temperature cooker according to the present invention configured as described above are as follows.

First, the thermistor is fixed to the fixing groove 51 of the actuator 5, and fixed terminals 8 connecting lead wires connected to both sides of the thermistor are respectively installed and fixed. In addition, the inner elastic member 10 and the mobile terminal 7 are inserted into the coupling groove 55 of the actuator 5, and the fixed terminal piece 81 of the fixed terminal 8 is in the coupling groove inner direction. It is installed to be bent inwardly so as to protrude into a state capable of short-circuit with the mobile terminal (7). In this case, the protruding piece formed by partially cutting from the fixed terminal guide 82 of the fixed terminal may be bent in the direction in which the fixed terminal piece is bent so that the protruding piece may be short-circuited with the mobile terminal.

Then, the mobile terminal 7 and the support bar 9 are integrally formed, and the support bar 9 is inserted into the through hole 44 of the insulation guide 4, and then the actuator 5 is insulated from the guide 4. When inserted into the inner side, the supporting rod 9 is in a state protruding to the lower portion of the insulating guide (4).

When the insulation guide 4 and the actuator 5 are assembled and integrated, the actuator 5 and the insulation guide 4 are inserted into the case 3, where the assembled insulation guide 4 and The actuator 5 has a circular cross section, which facilitates the insertion into the case 3. Here, the lower part of the case 3 is in an open state, but a pedestal 31 is formed at the lower end thereof so that the insulation guide 4 is not separated from the lower part of the case 3.

When the insulation guide 4 and the actuator 5 are embedded in the case 3, the conductive plate 6 is fixed to the upper part of the case 3, and then the case 3 is attached to the outer elastic member 2. An electric wire extending through the lower opening of the case 3 by pressing the outer elastic member 2 while being inserted into the inside and placing the case 3 and the outer elastic member 2 in the case holder 1. 83 is connected to the electronic circuit through a hole formed in the case holder (1), and the support leg 32 of the case (3) is fitted to the fastener 12 of the case holder (1) to complete the assembly. .

Figure 3a is a cross-sectional view of a state according to a first embodiment of the present invention, showing the internal state of the present invention for a state in which there is no heating element such as the inner pot of the rice cooker. In this case, in the temperature sensing device, the case 3 and the case holder 1 are spaced apart, and the internal elastic member 10 is removed as the pressure of the case holder 1 which presses the upper support rod 9 disappears. Since the support rod 9 and the mobile terminal 7 are vertically lowered, the mobile terminal 7 is secured not only to the fixed piece 81 but also to the protruding piece 83 which is bent and protruded from the fixed terminal guide 82. Will be in contact.

This contact state becomes a kind of signal and is transmitted to the control device through the conductor. A control device that recognizes the contact between the mobile terminal 7, the fixed terminal piece 81, and the protruding piece 83 controls the heating element so that power is not supplied to the heating device.

3b is a cross-sectional view of a state according to a second embodiment of the present invention, which corresponds to a case in which a heated object such as an inner pot of an electric rice cooker is placed on a heating body. By placing the object to be heated, the conductive plate 6 forms a parallel position with the heating body, and the external elastic member is compressed to shorten its length. In addition, the conductive plate 6 is completely inserted into the lower portion of the heating body and the bottom surface of the case 3 is in contact with the bottom surface 11 of the case holder 1, and protrudes to the bottom of the case 3 The supporting rod 9 is inserted into the coupling groove 55 of the actuator 5 using the bottom surface 11 of the case holder 1 as a supporting point, and the coupling groove 55 of the actuator 5 is supported. Since the inner elastic member 10 is in the built-in state, the support rod 9 is inserted into the coupling groove 55 while pressing the inner elastic member 10, and is fixed to the actuator 5 at the same time. The movable terminal 7 which is in contact with the fixed terminal piece 81 and the protruding piece 82 of the fixed terminal 8 is interposed between the supporting rod 9 and the internal elastic member 10, and thus the supporting rod 9 As the vertical rises into the coupling groove 55, the mobile terminal 7 also vertically into the coupling groove 55 while pressing the inner elastic member 10. That is, after all, the mobile terminal 7 are spaced apart and the fixed side fixed terminal 81 and the projecting piece 83.

This non-contact state is transmitted to the control device through the installed conductors, the heating element is operated, and the thermistor for measuring the temperature change is also transmitted to the conductors by conducting the temperature change of each heat through the conduction plate 6, and consequently Prevention function can be performed.

Embodiments of the present invention described above are described to facilitate understanding of the present invention, and various additions and modifications may be made within the spirit and scope of the present invention disclosed in the appended utility model claims.

According to the present invention, even if the fixed terminal piece and the mobile terminal causes a poor contact, the projecting piece can continuously maintain the foldable contact with the mobile terminal, thereby preventing malfunction of the rice cooker in advance. Since the fixed terminal guide itself may be partially cut, the partially cut part may be formed by bending the fixed terminal piece in a bent direction, thus preventing the airflow of the temperature sensing device without processing such as bonding additional materials. You can do it.

1 is an exploded perspective view of a switch for preventing air of the temperature sensing device for an electric rice cooker according to the present invention,

FIG. 2 is an enlarged perspective view of the main part of FIG.

3a and 3b shows an operation state diagram of the anti-air switch according to the present invention.

* Description of the symbols for the main parts of the drawings *

1: Case holder 2: External elastic member

3: Case 4: Insulation Guide

5: actuator 6: conductive plate

7: Mobile terminal 8: Fixed terminal

9: support rod 10: internal elastic member

11: bottom 12: fixture

31: stand 32: support leg

41: flange 42: side wall

43: Bottom 44: Through-hole

51: fixed groove 52: fixed terminal coupling groove

53: upper protrusion 54: flange

55: coupling groove 81: fixed terminal

82: Fixed Terminal Guide 83: Extrusion

Claims (2)

A case 3 is installed on the case holder 1 by an external elastic member 2 and is installed inside the case in which the actuator 5 and the insulation guide 4 are fitted. In the temperature sensing device for an electric rice cooker for sensing the temperature by the conductive plate 6 and the heat sensor attached to the conductive plate is coupled to the case, The actuator is coupled to the support rod 9 which is driven by the fixed terminal 8 and the internal elastic member 10 connected to the heat sensing sensor and installed in the through hole 44 of the insulation guide. A mobile terminal 7 shorted, The fixed terminal includes a fixed terminal piece 81 connected to the mobile terminal and a fixed terminal guide 82 fitted to the actuator, wherein the fixed terminal guide is formed by protruding in the direction in which the fixed terminal piece is bent. Anti-air switch of the temperature sensing device for an electric rice cooker comprising a protrusion piece (83). The method of claim 1, The protruding piece is formed by bending a part of the fixed terminal guide by bending a part of the fixed terminal piece in a direction in which the fixed terminal piece is bent.