JP3745766B2 - Electric heat pot - Google Patents

Description

The present invention relates to an electric insulation pot that warms a liquid in an inner container with a heater.

Conventionally, as an electric heat insulating pot, an outer body surrounding the inner container is provided, a heater for heating the liquid in the inner container is fixed to the bottom outer wall of the inner container, and heat radiation to the lower side of the heater is prevented on the lower surface of the heater Japanese Patent No. 3274801 (see Patent Document 1 and FIGS. 3 and 5) discloses an electric water heater having a structure in which a heat shield plate is provided and a bottom member is provided below the heat shield plate to cover the lower end of the exterior body.

Japanese Patent No. 3274801 (FIGS. 3 and 5)

Hereinafter, a conventional electric water heater will be described with reference to FIGS.
Although the electric water heater of this patent document 1 is a thing of the structure which not only keeps the liquid in an inner container but keeps boiling, the electronic circuit mechanism 9 which controls the liquid temperature in the inner container 2, and an inner container 2, a thermistor 10 that is a temperature sensor that senses the temperature of the liquid in the inside 2 and transmits it to the electronic circuit mechanism 9, and the thermistor hole 24 is provided at substantially the center of the heat shield 11, while the thermistor mounting bracket 12 is provided, The thermistor mounting bracket 12 is engaged with the heat shield plate 11 in a state where the 10 sensing surfaces and the bottom surface of the inner container 2 are in contact with each other, and the thermistor 10 is fixedly held.

However, in this electric water heater, the structure of the thermistor mounting bracket 12 is complicated and difficult to process, and the thermistor 10 that is a temperature sensor and the inner container 2 are brought into stable contact by the spring property of the thermistor mounting bracket. There is a problem that the effective range of the spring effect that the thermistor mounting bracket has is narrow, and the contact efficiency between the thermistor and the inner container is poor.

Further, since the thermistor mounting bracket 12 cannot be attached to the heat shield plate 11 unless the heat shield plate 11 is attached below the inner vessel 2 and the thermistor 10 and the inner vessel 2 are in contact with each other, 11 is not possible at all, and the mounting operation of the thermistor mounting bracket 12 at the bottom of the narrow electric water heater 1 main body is very troublesome and cannot be easily performed.

The present invention includes an inner container 2 that contains a liquid, a heater 3 that heats the liquid in the inner container 2, an outer body 4 that surrounds the inner container 2, and an upper portion of the inner container 2 at the upper end of the outer body 4. A lid 5 that opens and closes the opening, a bottom cover body 8 that covers the bottom of the inner container 2, a discharge mechanism 11 that discharges the liquid in the inner container 2 to the outside, and an electronic circuit that controls the liquid temperature in the inner container 2 A mechanism 14 and a temperature sensor 15 that senses the temperature of the liquid and transmits the temperature to the electronic circuit mechanism 14 are provided. A shielding plate 7 is provided to prevent heat from being radiated downward from the heater 3. A through hole 73 for the temperature sensor is provided in the shielding plate 7. In the electric insulation pot 1 in which the temperature sensor 15 is sandwiched in the through hole 73 and the sensing surface of the temperature sensor is brought into contact with the bottom surface of the inner container, the through hole 73 of the shielding plate 7 is formed in a cross shape. The sensor body 56 and a spring 58 for holding the sensor body are inserted into the hollow inside. The cylindrical member 57 is provided, the annular flange 62 is provided on the outer periphery of the upper end of the cylindrical member 57, the claws 63 are respectively projected on the diagonal line around the hollow at the upper end of the annular flange, and the sensor body 56 and the spring 58 are inserted. The member 57 is inserted into the cross-shaped through hole 73 from the lower side of the shielding plate 7, the annular flange 62 is brought into contact with the lower side surface of the through hole 73, and the respective claws 63 penetrating the through hole 73 are connected to the cross of the through hole 73. In addition, the spring 58 is in contact with each inner protruding end 47 intersecting the adjacent cross-shaped end of the through hole 73 from within the cylindrical member 57.

An annular protrusion 61 is provided on the outer peripheral wall of the sensor body 56, and an annular rib 59 that passes through the outer peripheral wall of the sensor body and engages the annular protrusion 61 is provided inside the lower end of the cylindrical member 57. It has a configuration.

The present invention solves the conventional problems. The contact state between the temperature sensor and the inner container is reliable, the contact efficiency of the temperature sensor is good, and unnecessary power supply is not required. Further, the structure is simple and the assembling work can be performed very easily.

The electric warming pot 1 includes an inner container 2 having upper and lower openings, a heater 3 on the bottom outer wall of the inner container 2 for heating the liquid in the inner container, an outer body 4 surrounding the inner container 2, and an upper end of the outer body 4 A lid 5 that opens and closes the upper end opening of the inner container 2 and a bottom plate 6 that supports the inner container 2 and a central heater 3 that supports the inner heater 2 are attached to the lower end of the inner container 2. A metal shielding plate 7 that shields heat radiation, a bottom cover body 8 that covers the lower end surface of the exterior body leaving the lower front surface of the exterior body 4 at a distance from the shield plate 7, and attached to the bottom cover body 8, The base 9 having the space 29 between the lower part of the exterior body and the joint pipe 10 communicating with the lower end opening of the inner container 2 communicates with the joint pipe 10 to discharge the liquid in the inner container toward the space 29 of the base 9. A discharge mechanism 11; a liquid amount display mechanism 12 for displaying the liquid amount in the inner container at the top and bottom of the front surface of the exterior body; A front cover 13 that covers the discharge mechanism 11 and the liquid amount display mechanism 12 on the front surface of the body from the upper front surface to the lower front surface, an electronic circuit mechanism 14 that controls the liquid temperature in the inner container 2, and senses the liquid temperature. And a temperature sensor 15 for transmitting to the electronic circuit mechanism 14. Reference numeral 32 denotes a drain discharge base at the lower end of the joint pipe 10 that discharges the drain from the joint pipe 10 toward the space 29 of the base 9.

The inner container 2 is a single-walled container made of metal such as glass or stainless steel, and has a bottomed cylindrical shape. The upper end has a wide mouth that is easy to clean by putting a hand in the inner container, and the lower end has a narrow mouth. It is integrally formed as a narrow-mouthed cylindrical body 54 extending downward.
When the inner container 2 is made of glass, silver deposition may be performed on the inner wall. A hollow joint pipe 10 made of an elastic material such as rubber is communicated with the narrow tube body 54 of the inner container 2.

The heater 3 is formed in a flat ring shape and is affixed around the narrow-mouthed cylindrical body 54 of the inner container 2, and does not boil the liquid in the inner container simply by warming it. Between the heater 3 and the bottom surface of the inner container 2, an extremely thin plate-like sheet 55 having good heat resistance and thermal conductivity is attached. The sheet 55 is formed in a donut shape by an elastic material such as a rubber material.

By sticking the sheet 55, even if the bottom surface of the inner container 2 is not a uniform flat surface, the heat of the heater 3 can be sufficiently transferred to the entire bottom surface of the inner container 2 via the sheet 55, which is useless. Heat dissipation can be prevented. The sheet 55 may be attached with an adhesive or the like so as not to be detached from the bottom surface of the inner container 2. Similarly, the heater 3 attached on the sheet 55 may be attached with an adhesive or the like so as not to be detached from the sheet.

Reference numeral 68 denotes a presser fitting for pressing the heater 3 against the sheet 55, which is a thin plate made of a metal material such as stainless steel, and is formed in a semicircular arc shape with a central opening cut out on one side. As shown in FIG. 3, the holding metal fitting 68 is integrally formed with holding claws 69 on both the left and right sides, and the holding claw 69 passes through a front notch groove 71 of a shielding plate 7 to be described later, and its tip Is bent on the left and right side walls of the front notch groove 71.

The exterior body 4 is integrally formed with a body portion that covers the peripheral side wall of the inner container 2 and a shoulder portion that covers the upper end portion of the inner container 2 with a synthetic resin material, and the center of the upper end is lowered stepwise, The upper end opening of the inner container 2 is in contact with the seal packing. A screw is engraved on the stepped inner side wall at the center of the upper end of the exterior body 4 so that a lid 5 described later is screwed. The exterior body 4 is spaced apart from the inner container 2 by a predetermined distance, and is provided with a plurality of locking pieces 64 and 64 for locking a bottom plate 6 (described later) with an appropriate distance from the lower inner peripheral wall.

As shown in FIG. 2, the bottom plate 6 that supports the inner container 2 has a large opening at the center, a support base 65 that supports a pedestal 9 described later at the rear lower end, and a downward hang downward on both the front left and right sides. The hanging pieces 23 and 23 for hooking the fitting pieces of the cover 13 and the columns 66 and 66 for providing a large gap between the bottom cover body 8 described later are integrally formed.

A fitting groove 28 penetrating in the front-rear direction is provided at the tip of the hanging piece 23 of the bottom plate 6. On the outer peripheral wall of the bottom plate 6, a plurality of engagement grooves 67 into which the locking pieces 64 of the exterior body 4 are fitted are provided. After this bottom plate 6 is engaged with the locking piece 64 of the exterior body 4 to support the inner container 2, the space between the bottom plate 6, the exterior body 4 and the inner container 2 is filled with foamed urethane, The durability is improved, and the fixing of the bottom plate 6 engaged with the exterior body 4 is ensured.

The shielding plate 7 is a thin plate made of a metal material such as stainless steel and is formed in a substantially disc shape with a central opening, and is screwed to the bottom plate 6 so that the heat of the heater 3 is not dissipated downward.

As shown in FIG. 3, the shielding plate 7 has left and right through holes 70 and 70 penetrating the hanging piece 23 of the bottom plate 6 on both the front left and right sides, a front notch groove 71 on the rear side, and a rear side behind the central opening. A notch groove 72 and a trapezoidal cross-shaped through-hole 73 that passes through the trapezoidal shape for locking the temperature sensor 15 are provided on the right side of the central opening.

The through holes 73 cut out in a cross shape are four outer sides in which each claw 63 of a cylindrical member 57 of the temperature sensor 15 described later is pushed up from the lower side of the shielding plate 7 and forcibly fitted on the upper side of the shielding plate. The protrusions 46 and the inner protrusions 47 that intersect between the adjacent outer protrusions 46 are provided alternately. The through-hole 73 may be cut out in a single-letter shape, but considers stability due to locking of a cylindrical member 57 described later and stability due to locking of a spring 58 that supports one end from the inside of the cylindrical member. Then, it is more effective to cut out in a cross shape.

The front notch groove 71 and the rear notch groove 72 are bent pieces 74 and 76 in which one of the lateral direction of the left and right sides and the longitudinal direction of the front and rear are cut off and the other of the longitudinal direction is bent downward. The bent pieces 74 and 76 are each fitted with a U-shaped sandwiching piece 75 made of an elastic material such as rubber so as to come into contact with the side surface of the presser fitting 68 opposite to the heater 3 side. .

When the shield plate 7 is screwed to the bottom plate 6, the presser fitting 68 locked to the bottom plate 6 presses the heater 3 against the sheet 55. At this time, the presser fitting 68 has an indirect cushioning property due to the elastic force of the sandwiching piece 75 in contact with the back side of the presser fitting 68, and the heater 3 is reliably pressed against the seat 55.

Reference numeral 77 denotes a fixing bracket for supporting the joint pipe 10, and is screwed to a longitudinal surface on the opposite side of the bent piece 74 of the front notch groove 71 of the shielding plate 7. The joint pipe 10 is made of an elastic material such as rubber and is hollow and formed in an L shape. The rear end of the joint pipe 10 is closely fitted to the outer periphery of the narrow tube 54 of the inner container 2, and the rear outer periphery of the front end is fixed. It penetrates through the central opening of the metal fitting 77 and extends forward. The joint pipe 10 is securely fixed and held by the fitting of the outer periphery of the narrow-mouthed cylindrical body 54 and the support of the fixing bracket 77.

The bottom cover body 8 is made of a synthetic resin material, and covers the lower end surface of the exterior body except the lower front surface of the exterior body 4 with a space in the vertical direction from the shielding plate 7. Between the bottom cover body 8 and the shielding plate 7, a thermal fuse, a board equipped with an electronic circuit, a plug receptacle and the like are arranged. Even if this bottom cover body 8 is formed integrally with a pedestal 9 described later, it does not cause any trouble.

The pedestal 9 is formed of a synthetic resin material, is attached to the outer peripheral end of the bottom cover body 8, and includes a space portion 29 between the lower part of the exterior body 4 and the front. 50 is a cup for receiving liquid.

The lid body 5 is screwed onto a screw engraved in a step shape of the exterior body 4, and has a lower lid 16 that opens up and down at the center, and an upper lid that covers the upper surface of the lower lid 16 and has a wide opening at the center up and down. 17, a water injection pipe 18 that hangs down from the center of the lower end of the lower lid 16, and a funnel-shaped liquid passage that communicates with the water injection pipe 18, and is provided between the upper lid 17 and the lower lid 16. A moving guide plate 20 and an opening / closing plate 21 that slides with the guide plate 20 to open and close the liquid path are provided.

The lid 5 is screwed into the stepped shape of the exterior body 4, the operating lever 19 is operated to move the opening / closing plate 21 to open, and the liquid path of the guide plate 20 and the guide plate 20 are opened from the center opening of the upper lid 17. A liquid can be supplied into the inner container from above the upper lid 17 by communicating with the central opening of the lower lid 16 and the water injection pipe 18.

When the supply of the liquid is finished, the operation lever 19 is operated in the reverse direction, and the opening / closing plate 21 is moved in the reverse direction and closed. Thereby, the opening at the center of the upper lid 17 and the liquid path of the guide plate 20 are reliably shielded, and the supply of liquid can be prevented. The lid 5 is structured to supply the liquid into the inner container while being screwed. However, the lid 5 is not particularly limited to this, and even a normal detachable stopper structure causes any trouble. is not.

The discharge mechanism 11 includes a unit pipe 31 having a liquid passage communicating with the joint pipe 10, a valve body for closing and opening the liquid passage in the unit pipe 31, a lever for operating the valve body from the outside front surface, and a lever. A sliding plate 34 that slides, a spring that returns the valve body, a discharge pipe 35 that communicates with the liquid passage and discharges liquid to the outside, and a touch that is provided on the front upper portion of the exterior body 4 to operate the sliding plate 34. The plate 37 and an operation shaft 38 that transmits the drive of the touch plate 37 to the sliding plate 34 are configured.

The touch plate 37 is located above a front cover 13 described later and can be pressed, and a touch plate return spring is provided on the inner wall side.
The operation shaft 38 is formed of a single metal rod-like body, and includes a bottom body that contacts the sliding plate 34, a left and right vertical body, and a left and right vertical body that extend upward from both left and right sides of the bottom body. The left and right engaging bodies facing each other are integrally formed, and the left and right vertical bodies are locked to the touch plate 37.
The unit pipe 31 and the sliding plate 34 of the discharge mechanism 11 are fixed to a holding plate 36 that protrudes to the inside of the front cover 13 described later.

When the ejection mechanism 11 places a finger on the touch plate 37 and presses the touch plate 37 downward, the operation shaft 38 interlocked with the touch plate 37 is lowered. The lowering of the operating shaft 38 pushes the lever backward via the sliding plate 34. By pressing the lever, the valve body in the unit pipe 31 is pushed rearward, the liquid passage in the unit pipe 31 and the discharge pipe 35 are communicated, and the liquid in the inner container 2 is discharged from the tip of the discharge pipe 35. It becomes.

When the finger placed on the touch plate 37 is released, the touch plate 37 is returned to the original position by the spring provided on the touch plate 37, and the operation shaft 38 is also raised and returned at the same time. As the operating shaft 38 is raised, the lever is returned to the return state via the sliding plate 34. Further, the valve body in the unit pipe 31 is returned to the front via a spring, and the communication between the liquid passage and the discharge pipe 35 is closed to prevent liquid discharge.

The liquid amount display mechanism 12 can be seen through a see-through window 44 in front of the front cover 13 described later, and includes a liquid amount pipe 39 that indicates the amount of liquid in the inner container as a liquid level, and a cover member 22 that covers the rear side of the liquid amount pipe 39. A lower joint pipe 41 having one end communicating with the lower end of the liquid pipe 39 and the other end communicating with the liquid passage of the unit pipe 31; one end communicating with the upper end of the liquid pipe 39; The upper joint pipe 40 extends to near the height position of the upper end opening of the upper joint pipe 40 as a free end.

The other end of the lower joint pipe 41 communicating with the liquid quantity pipe 39 has a liquid in front of the rear of the unit pipe 31 fitted in the joint pipe 10 behind the valve body sliding portion in the unit pipe 31. It communicates with the passage. As a result, the liquid amount display mechanism 12 is also attached to and detached from the main body of the liquid heat insulating container 1 together with the front cover 13 in synchronization with the discharge mechanism 11 attached and detached together with the front cover 13.

As shown in FIG. 1, the front cover 13 includes an upper protruding piece 25 that supports the upper joint pipe 40, a lower protruding piece 26 that supports the lower joint pipe 41, the unit pipe 31 and the sliding plate 34 of the discharge mechanism 11. The holding plate 36 to be fixed and the fitting portions 43, 43 are integrally formed on the left and right inside the lower portion.
Reference numeral 44 denotes a see-through window cut out for viewing the liquid amount pipe 39.

The fitting portion 43 of the front cover 13 is temporarily raised from the bottom portion of the front cover 13 and extends backward to bend and extends forward, and a pressing piece that hangs downward from the insertion piece and extends forward. Are integrally formed, and the pressing piece is separated from the bottom of the front cover 13. A claw portion for preventing the insertion piece from being extracted from the fitting hole 28 after the insertion piece is inserted into the fitting hole 28 of the bottom plate 6 is provided on the lower surface wall of the insertion piece. Since the pressing piece is separated from the bottom part of the front cover 13, it has elasticity and can push up the lower wall of the insertion piece.

In order to remove the front cover 13 from the main body of the liquid heat insulating container 1, when the pressing piece of the fitting portion 43 is pushed upward and pulled forward, the claw portion of the insertion piece is pushed up by elasticity and inserted through the fitting hole 28 of the bottom plate 6. The front cover 13 can be pulled forward by removing the piece, and the front cover 13 can be removed very easily without a tool.

Of course, if the front cover 13 is pulled forward, the rear end of the unit pipe 31 is disengaged from the joint pipe 10, and the discharge mechanism 11 can be removed from the main body of the liquid heat insulating container 1 together with the front cover 13. Further, the liquid amount display mechanism 12 can be removed from the main body of the liquid heat retaining container 1 together with the front cover 13 in the same manner as the discharge mechanism 11.

On the contrary, in order to attach the front cover 13 to the main body of the liquid heat insulating container 1, when the insertion piece of the fitting portion 43 is inserted toward the fitting hole 28 of the bottom plate 6, the claw portion of the insertion piece becomes the fitting hole. The front cover 13 can be securely and easily mounted without a tool by being locked to the lower wall forming the fitting hole 28 from the rear side of 28.

Of course, by inserting the insertion piece of the fitting portion 43 toward the fitting hole 28 of the bottom plate 6 and simultaneously inserting the rear end portion of the unit pipe 31 of the discharge mechanism 11 into the joint pipe 10, The display mechanism 12 can be attached to the main body of the liquid heat insulating container 1. The rear end portion of the unit pipe 31 of the discharge mechanism 11 inserted into the joint pipe 10 and the joint pipe 10 are always positioned during fitting.

The electronic circuit mechanism 14 for controlling the liquid temperature in the inner container 2 includes a thermal fuse, a substrate equipped with an electronic circuit, a plug receiver for supplying an external power supply through a plug, and a wiring connecting them. And the bottom cover body 7. The board | substrate provided with the electronic circuit is stored in the box for board | substrates so that a water drop may not be applied.

As shown in FIG. 4, the temperature sensor 15 that senses the liquid temperature and transmits it to the electronic circuit mechanism 14 includes a sensor main body 56 having a lead wire 60 and a cylindrical member 57 into which the sensor main body 56 is inserted. And a spring 58 inserted into the cylindrical member 57 together with the sensor main body 56.

The sensor body 56 incorporates a sensing unit in the tip of the metal cap body, and the bottom of the tip is used as a sensing surface. An annular protrusion 61 is provided on the outer peripheral wall above the sensor body 56.
The spring 58 is placed on the annular protrusion 61 of the sensor body 56 past the two lead wires 60.

As shown in FIGS. 4 and 5, the cylindrical member 57 is hollow inside and is provided with an annular flange 62 on the outer periphery of the upper end, and is divided into four on the diagonal line around the hollow at the upper end of the annular flange 62. The claws 63 are provided in an annular shape.

The claw 63 passes through a cross-shaped through hole 73 provided in the shielding plate 7 from the lower side of the shielding plate to the outer protruding end portion 46 of the through hole 73 and is forcibly fitted on the end wall of the outer protruding end portion 46. ing. Simultaneously with the forcible fitting of the claw 63, the upper surface of the annular flange 62 of the cylindrical member 57 comes into contact with the lower end surface of the circumference of the through hole 73.

As shown in FIG. 5, the lower end of the cylindrical member 57 communicates with the hollow inside and penetrates the outer peripheral surface of the sensor body 56, and an annular ring 61 on which the annular protrusion 61 of the sensor body 56 is placed. Ribs 59 are provided.

The hollow inner diameter of the cylindrical member 57 is such that the annular protrusion 61 of the sensor body 56 can be inserted smoothly.
The spring 58 has an outer diameter that can be inserted into the hollow interior of the cylindrical member 57, and has an inner diameter that is larger than the virtual inner diameter 78 of the cross-shaped through hole 73 of the shielding plate 7.

The temperature sensor 15 is attached to the shielding plate 7 by inserting the sensor body 56 and the spring 58 into the hollow inside the tubular member 57 from above the tubular member 57 and then crossing from the lower side of the shielding plate 7. The claw 63 of the cylindrical member 57 is pushed up along the outer projecting end portion 46 of the through-hole 73 and forcibly fitted.

As a result, the upper surface of the annular flange 62 of the cylindrical member 57 comes into contact with the circumferential lower end surface of the through hole 73 and one end of the spring 58 in the cylindrical member 57 is placed on the annular protrusion 61 of the sensor body 56. The other end comes into contact with the lower surface of the inner projecting end portion 47 that forms the cross-shaped through hole 73 from within the cylindrical member 57. The sensor body 56 is pushed down by the spring 58 and is surely brought into contact with the bottom surface of the inner container 2, so that the contact efficiency of the temperature sensor becomes very good.

Although the embodiments considered to be representative of the present invention have been described above, the present invention is not necessarily limited only to the structures of these embodiments. For example, the present invention is not limited to keeping the temperature of the liquid in the inner container but also boiling. Even a structure having such a structure can be implemented with appropriate modifications within the scope of the above-described constituent requirements of the present invention, the object of the present invention being achieved, and the effects of the present invention being achieved.

The longitudinal cross-sectional view of this invention Example. The disassembled perspective view which shows the bottom part of this invention Example. The disassembled perspective view which shows the shielding board of this invention Example. The disassembled perspective view which shows the principal part of this invention Example. The longitudinal cross-sectional view which shows the principal part of this invention Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Electric heat retention pot 2 ... Inner container 3 ... Heater 4 ... Exterior body 5 ... Cover body 7 ... Shielding board 8 ... Bottom cover body 9 ... Base 10 ... Joint pipe 11 ... Discharge mechanism 12 ... Liquid quantity display mechanism 13 ... Front cover DESCRIPTION OF SYMBOLS 14 ... Electronic circuit mechanism 15 ... Temperature sensor 46 ... Outer protrusion 47 ... Inner protrusion 56 ... Sensor main body 57 ... Cylindrical member 58 ... Spring 63 ... Claw 73 ... Through-hole

Claims (2)

An inner container (2) for storing liquid, a heater (3) for heating the liquid in the inner container (2), an outer package (4) surrounding the inner container (2), and an upper end of the outer package (4) A lid (5) for opening and closing the upper opening of the inner container (2), a bottom cover body (8) covering the bottom of the inner container (2), and discharging the liquid in the inner container (2) to the outside A discharge mechanism (11), an electronic circuit mechanism (14) for controlling the liquid temperature in the inner container (2), and a temperature sensor (15) for sensing the liquid temperature and transmitting it to the electronic circuit mechanism (14). A shielding plate (7) for preventing heat radiation downward from the heater (3) is provided, and a through hole (73) for a temperature sensor is provided in the shielding plate (7), and a temperature sensor ( 15) In the electric heat retaining pot (1) formed by sandwiching the bottom surface of the inner container and the sensing surface of the temperature sensor, the through hole (73) of the shielding plate (7) is crossed. An internal hollow cylindrical member (57) for inserting a sensor body (56) and a spring (58) for holding the sensor body is provided, and an annular flange is provided on the outer periphery of the upper end of the cylindrical member (57). (62), claws (63) projecting diagonally around the hollow at the upper end of the annular flange, and the cylindrical member (57) into which the sensor body (56) and the spring (58) are inserted is shielded ( 7) Each nail (63) inserted through the through-hole (73) by inserting the annular flange (62) into the bottom surface of the through-hole (73) by inserting the cross-shaped through-hole (73) from the lower side. Is locked to each of the cross-shaped outer protrusions (46) of the through hole (73), and the spring (58) intersects the adjacent cross-shaped end of the through hole (73) from within the cylindrical member (57). An electric heat insulating pot characterized by contacting each inner protrusion (47). An annular protrusion (61) is provided on the outer peripheral wall of the sensor body (56), and the annular protrusion (61) is engaged inside the lower end of the cylindrical member (57) through the outer peripheral wall of the sensor body. The electric heat-insulating pot according to claim 1, further comprising an annular rib (59) for stopping.

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