Automatic stove-turnoff device

Abstract

Disclosed in the present invention is an automatic stove-turnoff device, comprising: a housing; a reset operation knob rotatably arranged at the top of the housing; a rotating member, a stop portion being provided on the circumferential side of the rotating member, an assembly position being provided at the bottom of the rotating member, and the rotating member being located below the reset operation knob and being connected to the reset operation knob so as to enable synchronous rotation; a torsion spring for providing a reset rotational force to the reset operation knob; a limiting mechanism comprising a limiting pin, a reset spring and an electromagnet, the reset spring enabling one end of the limiting pin to stop on one side of the stop portion so as to limit rotation of the rotating member; a timer for setting a duration or a time point; a power supply for supplying power to the automatic stove-turnoff device; and a controller connected to the power supply and the timer, wherein the controller controls the electromagnet to be energized according to the duration or the time point set by the timer; when the electromagnet is energized, a magnetic attraction force is generated to release the locking of the stop portion by the limiting pin, and the rotating member can be reset and rotated under the reset force of the torsion spring to achieve automatic stove-turnoff.

Description

Automatic shutoff device Technical Field

[0001] The invention relates to the field of gas stove accessories, in particular to an automatic flameout device. Background Art

[0002] When using a gas stove for cooking, people often forget to turn off the stove in time. This phenomenon has certain disadvantages and safety hazards. On the one hand, the cooking time is too long, causing the food to be overcooked or burnt dry. On the other hand, it is easy to cause fire and other dangerous things.

[0003] The main solutions in the industry at present are:

[0004] 1. The gas stove has a built-in anti-dry burning function; currently it has a small market share.

[0005] 2. By adding an automatic flame-off device to the original switch of the gas stove, the automatic flame-off device is used to automatically turn off the switch of the gas stove according to the set time. However, in the prior art, the automatic flame-off device is generally driven by a motor to rotate, which is expensive and consumes a lot of power when in use, resulting in the need for frequent charging of the automatic flame-off device. For example: CN 116398908 A discloses a timed automatic flame-off device, including a base and an ignition rotary cover, the ignition rotary cover is movably attached to the base, and a accommodating chamber is formed between the two; the accommodating chamber is provided with an upper circuit board, an ignition assembly, a lower circuit board, a motor group, a motor seat and an ignition rod in order from top to bottom. For another example: CN 218721702 U discloses an external stove timer, which is provided with a rotating motor and a power supply at the center of the timer body, and the motor shaft of the rotating motor is fixedly connected to the rotating control member.

[0006] In addition, some of the automatic shut-off devices installed in the existing technology are recessed and matched with special gas stove knobs. When installed, the recess is matched and positioned with the gas stove knob, and then the gas stove knob can be controlled by the automatic shut-off device. Therefore, for the various specifications of gas stoves on the market, it is necessary to design and produce multiple products for the production / sales end, which is not conducive to mass production. It is also difficult to better control inventory and the cycle time of responding to market demand. For users, they need to make targeted purchases, which makes purchases more difficult. If a purchase error occurs, it will delay the use time and affect the purchasing experience. Some models are compatible with different knobs. For example, CN 218721702 U uses a suction cup to adhere to smooth surfaces such as gas stove panels. The fixed claw in the rotary control is used to cover the gas stove knob and, in conjunction with a timer controller, automatically shut off the stove. The fixed claw can adapt to the knob switches of most stoves. However, this type of foot-type device is prone to grease and dirt accumulation during use, making it difficult to clean. After repeated use, the suction cup and fixed claw are prone to degradation, resulting in unstable adsorption and unreliable rotation control, making it unsuitable for widespread application.

[0007] Therefore, it is necessary to study a new technical solution to solve the above problems. Technical Solutions

[0008] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide an automatic flame-off device, which mainly relies on the reset rotation under the reset force of the torsion spring to achieve automatic flame-off. It does not require the use of a motor to provide rotational power, and the structure becomes simpler, which is conducive to reducing costs. Moreover, the electromagnet only needs to be energized for a moment, and the power consumption is very small. When in use, the automatic flame-off device cover can be placed on the switch of the gas stove. It is easy to operate and provides a good user experience.

[0009] To achieve the above object, the present invention adopts the following technical solutions:

[0010] An automatic fire-off device, comprising

[0011] case;

[0012] A reset operation knob rotatably disposed on the top of the housing;

[0013] A rotating member having a stopper portion provided on its circumferential side and an assembly position at its bottom; the rotating member is located below the reset operating knob and the two are connected so as to be able to rotate synchronously;

[0014] a torsion spring, which is used to provide a reset rotation force to the reset operation knob;

[0015] a limiting mechanism comprising a limiting pin, a return spring, and an electromagnet, wherein the return spring causes one end of the limiting pin to stop at one side of the stop portion to limit the rotation of the rotating member;

[0016] Timer, which is used to set duration or time point;

[0017] a power supply for supplying power to the automatic flameout device;

[0018] A controller is connected to the power supply and the timer respectively. The controller controls the electromagnet to be energized according to the duration or time point set by the timer. When the electromagnet is energized, a magnetic attraction is generated so that the limit pin releases the lock on the stop portion, and the rotating part can be reset and rotated under the reset force of the torsion spring to achieve automatic shutdown.

[0019] As a preferred solution, two stop parts are arranged at circumferential intervals on the circumferential side of the rotating part, one side of the stop part is a stop surface (usually a vertical surface arranged along the radial direction), and the other side of the stop part is a guide slope, and the limit pin stops at the stop surface; the limit pin is horizontally telescopically arranged, and it approaches or moves away from the stop part radially.

[0020] As a preferred solution, the shell includes an upper shell and a bottom shell, the upper shell cover is arranged above the bottom shell, a through hole is provided at the bottom of the bottom shell, and the assembly position is provided above the through hole.

[0021] As a preferred solution, a sinking cavity is recessed on the top of the upper shell, and the sinking cavity is arranged above the through hole. An axial hole is opened on the bottom wall of the sinking cavity and passes through the interior of the shell. The reset operating knob is located in the sinking cavity, and the rotating part is located inside the shell, and the rotating part forms a coaxial connection with the reset operating knob through the axial hole.

[0022] As a preferred solution, the torsion spring is arranged in the sinking cavity, and the torsion spring includes a spring body and a first torsion arm and a second torsion arm connected to both ends of the spring body. The spring body is sleeved on the reset operating knob, the first torsion arm acts on the reset operating knob, and the second torsion arm acts on the upper shell.

[0023] As a preferred embodiment, the lower end face of the bottom wall of the sinking cavity is provided with a circular convex rib, and the circular convex rib is arranged around the axial hole. The upper end face of the rotating part is in rotatable contact with the circular convex rib, so that a gap is maintained between the upper end of the rotating part and the lower end face of the bottom wall of the sinking cavity.

[0024] As a preferred embodiment, the bottom of the rotating member is detachably equipped with a universal knob assembly; the universal knob assembly includes a knob, a first insert and a second insert; the knob has a toggle portion and a connecting portion connected below the toggle portion, the toggle portion extends into the assembly position to achieve the positioning of the knob on the rotating member, thereby allowing the knob to rotate synchronously with the rotating member, and the bottom of the connecting portion is upwardly recessed with a first assembly groove, and the first assembly groove is a regular polygon; the first insert is pluggable and embedded in the first assembly groove, the outer circumference of the first insert matches the inner circumference of the first assembly groove, the bottom of the first insert is upwardly recessed with a second assembly groove, and the second assembly groove is a cut circle; the second insert is pluggable and embedded in the second assembly groove, the outer circumference of the second insert matches the inner circumference of the second assembly groove, and the bottom of the second insert is upwardly recessed with a third assembly groove, and the third assembly groove is a cut circle.

[0025] As a preferred solution, an operating groove for facilitating the removal of the second insert is provided on the side of the second assembly groove.

[0026] As a preferred solution, the operating groove passes through the second assembly groove through a side notch, and the operating groove extends beyond one end or both ends of the side notch to serve as an auxiliary groove for pulling out the first insert.

[0027] As a preferred solution, the bottom end surface of the bottom shell is provided with an anti-slip rubber pad, the top end surface and the bottom end surface of the anti-slip rubber pad are both removable adsorption surfaces, the top end surface of the anti-slip rubber pad is adsorbed on the bottom end surface of the bottom shell, and the bottom end surface of the anti-slip rubber pad is used to adsorb the gas stove panel.

[0028] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that it mainly utilizes the settings of the reset operation knob, the rotating part, the torsion spring, and the limit mechanism, and realizes automatic flameout by means of the reset rotation under the reset force of the torsion spring. There is no need to use a motor to provide rotational power, the structure becomes simpler, and it is beneficial to reduce costs. Moreover, the electromagnet only needs to be energized for a moment, and the power consumption is very small. The automatic flameout device can be used for a long time after a single charge, which effectively solves the problem that the automatic flameout device of traditional technology needs to be frequently charged. At the same time, by setting an assembly position at the bottom of the rotating part, the automatic flameout device cover can be placed on the switch of the gas stove when in use. It is easy to operate and provides a good user experience.

[0029] Furthermore, the bottom of the rotating part is detachably equipped with a universal knob assembly, and the universal knob assembly includes a knob, a first insert and a second insert. The knob, the first insert and the second insert can each provide a different assembly slot. In this way, after the user purchases this automatic flameout device, if the three assembly slots are applicable, it can be used directly. If the second assembly slot is applicable, the second insert can be unplugged before use. If the first assembly slot is applicable, the first insert (together with the second insert) can be unplugged before use. This meets the requirement that an automatic flameout device can be applicable to the installation and application of gas stove knobs of multiple specifications, is conducive to mass production, can better control inventory and response cycle to market demand, and is simple for users to purchase.

[0030] In addition, the anti-slip rubber pad can be firmly adsorbed on the gas stove panel, has a simple structure, is easy to disassemble and assemble, and is convenient for sanitary cleaning. Moreover, the anti-slip rubber pad is a gasket with mature technology, is easy to obtain, can be washed and reused many times, is highly practical, and is conducive to the installation and promotion of automatic flameout devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] FIG1 is a perspective view of an automatic flame-off device according to an embodiment of the present invention;

[0032] FIG2 is an exploded view of an automatic flameout device according to an embodiment of the present invention;

[0033] FIG3 is another exploded view of the automatic flameout device according to an embodiment of the present invention;

[0034] FIG4 is a cross-sectional view of an automatic flame-off device according to an embodiment of the present invention;

[0035] FIG5 is another cross-sectional view of the automatic flameout device according to an embodiment of the present invention;

[0036] 6 is an assembly diagram of the universal knob assembly of the automatic flameout device according to an embodiment of the present invention;

[0037] 7 is an exploded view of the universal knob assembly of the automatic shutoff device according to an embodiment of the present invention;

[0038] FIG8 is a diagram illustrating a first matching usage scenario of the universal knob assembly of the automatic flameout device according to an embodiment of the present invention;

[0039] 9 is a diagram illustrating a second matching usage scenario of the universal knob assembly of the automatic flameout device according to an embodiment of the present invention;

[0040] 10 is a diagram of a third matching usage scenario of the universal knob assembly of the automatic shutoff device according to an embodiment of the present invention;

[0041] FIG11 is a schematic diagram of two positioning directions of the rotating member and the knob of the automatic flameout device according to an embodiment of the present invention;

[0042] 12 is a top view of an automatic shutoff device according to another embodiment of the present invention (mainly showing the arrangement of buttons).

[0043] Description of the accompanying drawings: reset operation knob 101, power supply 102, timer 103, PCBA board 104, display screen 105, upper shell 106, bottom shell 107, through hole 108, sinking cavity 109, shaft hole 110, annular convex rib 111, anti-slip rubber pad 200, rotating part 1011, circular concave cavity 1012, stop arm 1013, stop part 1014, stop surface 1015, guide slope 1016, universal knob assembly 20, knob 21, first insert 22, second insert 23, toggle part 211, connecting part 212, first assembly groove 2121, second assembly groove 221, third assembly groove 231, operation groove 222, side notch 223, auxiliary extraction groove 224, torsion spring 30, limit pin 40. Best Mode for Carrying Out the Invention

[0044] Please refer to FIG. 1 to FIG. 12 , which show the specific structure of an embodiment of the present invention.

[0045] In the description of the present invention, it should be noted that the terms "up", "down", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the present invention.

[0046] An automatic flame-off device includes a housing, a reset operation knob 101, a rotating member 1011, a torsion spring 30, a timer 103, a power supply 102, and a controller.

[0047] The housing includes an upper shell 106 and a lower shell 107. The upper shell 106 is positioned above the lower shell 107, with the power supply located between the upper shell 106 and the lower shell 107. A circular through-hole 108 is provided at the bottom of the lower shell 107. A recessed cavity 109 is recessed at the top of the upper shell 106. An axial hole 110 is centrally defined in the bottom wall of the recessed cavity 109, extending through the interior of the housing. A circular rib 111 is provided on the lower end surface of the bottom wall of the recessed cavity 109. The rib 111 surrounds the axial hole 110 and is coaxial with the reset operating knob 101 and the rotating member 1011.

[0048] The reset operation knob 101 is rotatably arranged on the top of the shell, specifically, the reset operation knob 101 is located in the sinking cavity 109; the appearance of the reset operation knob 101 is the same or substantially the same as a common gas stove knob switch. In this way, when the automatic flameout device is installed, the user's operating feel / visual perception when using it can be close to the user's habits.

[0049] The rotating member 1011 is located inside the housing and is coaxially connected to the reset operating knob 101 via the shaft hole 110 (specifically, the rotating member 1011 and the reset operating knob 101 are connected by screws 1017). The upper end surface of the rotating member 1011 is rotatably in contact with the annular rib 111, so that a gap is maintained between the upper end of the rotating member 1011 and the lower end surface of the bottom wall of the sinking cavity 109, thereby significantly reducing the contact area and lowering friction. The rotating member 1011 (also known as a rotating wheel) is provided with a stopper 1014 on its circumference. In this embodiment, two stoppers 1014 are evenly spaced along the circumference of the rotating member 1011. One side of the stopper 1014 is a stopper surface 1015 (usually a vertical surface arranged along the radial direction), and the other side of the stopper 1014 is a guide slope 1016 (the guide slope is arranged at an acute angle to the stopper surface and is a vertical surface arranged along a tangent line of the circle in which the rotating member 1011 is located). The bottom of the rotating member 1011 has an assembly position, which is directly above the through hole 108. The assembly position includes an upwardly concave circular cavity 1012 provided at the bottom of the rotating member 1011. Two stop walls 1013 extend inward from the inner peripheral sidewall of the circular cavity 1012. The two stop arms 1013 are arranged in parallel and are respectively located in two diagonally arranged quadrants of the circular cavity 1013. The rotating member 1011 is located below the reset operating knob 101, and the two are connected to each other so as to rotate synchronously.

[0050] The torsion spring 30 is used to provide a reset rotation force to the reset operating knob 101; the torsion spring 30 is arranged in the sinking cavity 109, and the torsion spring 30 includes a spring body and a first torsion arm and a second torsion arm connected to both ends of the spring body. The spring body is sleeved on the reset operating knob 101, the first torsion arm acts on the reset operating knob 101, and the second torsion arm acts on the upper shell.

[0051] The limiting mechanism includes a limiting pin 40 (typically an iron pin or other magnetically attracted limiting pin 40), a return spring, and an electromagnet. The return spring forces one end of the limiting pin 40 to face the circumference of the rotating member 1011 and remain stopped on one side of the stop portion 1014 to limit the rotation of the rotating member 1011. The limiting pin 40 stops on the stop surface 1015. The limiting pin 40 is arranged to be horizontally telescopic, moving radially closer to or farther from the stop portion 1014.

[0052] The timer 103 is used to set a duration or a time point; that is, it can be selected to automatically turn off the fire at a certain time point as needed, or automatically turn off the fire when the set duration is reached. Taking the setting of the duration as an example, as shown in Figure 12, a number of buttons are provided on the top of the upper shell. By triggering the mode button, you can choose to switch between the duration mode and the time point mode. The "hour" key, "tenths" key, and "minutes" key are used to set the time point or duration value. The conventional timer 103 only has a "minutes" key, which needs to be triggered (for example, pressed or touched) multiple times to complete the time adjustment. In the present invention, a "tenths" key is specially provided, making time adjustment simpler and faster. If the time is a full ten, just trigger the "tenths" key directly. If the time value is less than 10, just trigger the "minutes" key. You can also use the "tenths" key in combination with the "minutes" key to obtain other time values ​​(for example, a duration of 35 minutes, a time point of 12:46, etc.).

[0053] The power supply 102 is located inside the housing and is used to supply power to the automatic flameout device. The power supply is a rechargeable power supply or the battery can be replaced by removing the power cover.

[0054] The controller is connected to the power supply 102 and the timer 103, respectively. It controls the electromagnet to energize according to the duration or time point set by the timer 103. When energized, the electromagnet generates a magnetic attraction force that causes the stop pin 40 to move away from the stop 1014, releasing the lock on the stop 1014. The rotating member 1011 can then return to its original position and rotate under the restoring force of the torsion spring 30, achieving automatic flameout. The controller is also connected to a display screen 105, which displays the set time point or duration, and also allows the remaining time to be viewed. The controller includes a PCBA board 104 (including chips disposed thereon).

[0055] A universal knob assembly 20 is detachably mounted on the bottom of the rotating member 10111011. The universal knob assembly 20 comprises a knob 21, a first insert 22, and a second insert 23. The knob 21 is positioned within the housing and corresponds to the through-hole 108. The knob 21 comprises a toggle portion 211 and a connecting portion 212 connected below the toggle portion 211. The toggle portion 211 extends into the assembly position to position the knob 21 on the rotating member 10111011, thereby enabling the knob 21 to rotate synchronously with the rotating member 10111011. Two stop arms 1013 can be used to position the toggle portion 211 in two directions (vertically and horizontally), meeting both positioning requirements. The bottom of the connecting portion 212 is recessed with a first mounting groove 2121, which is a regular polygon. In this embodiment, the first mounting groove 2121 is a regular octagon, considering that some of the knob connecting portions 212 of gas knobs on the market adopt a regular octagonal design. The first insert 22 is pluggable and inserted into the first mounting groove 2121. The outer periphery of the first insert 22 matches the inner periphery of the first mounting groove 2121. The bottom of the first insert 22 is recessed with a second mounting groove 221, which is a circular shape when viewed from above, typically with a large circular shape, such as a radius of 8 mm. The second insert 23 is pluggable and inserted into the second mounting groove 221. The outer periphery of the second insert 23 matches the inner periphery of the second mounting groove 221. The bottom of the second insert 23 is recessed with a third mounting groove 231, which is a circular shape when viewed from above, typically with a large circular shape, such as a radius of 8 mm. An access slot 222 is provided on the side of the second assembly slot 221 to facilitate the removal of the second insert 23. To remove the second insert 23, a clamp can be inserted into the access slot 222 and the third assembly slot 231 to grip and remove the second insert 23. Furthermore, the access slot 222 extends through the second assembly slot 221 via a side notch 223 and extends beyond one or both ends of the side notch 223, serving as an auxiliary slot 224 for removing the first insert 22. To remove the first insert 22, a clamp can be inserted into the auxiliary slot 224 and the third assembly slot 231 to grip and remove the first insert 22 (along with the second insert 23).

[0056] Furthermore, a non-slip rubber pad 200 is affixed to the bottom end of the bottom shell. Both the top and bottom surfaces of the non-slip rubber pad 200 are removable adsorption surfaces. The top surface of the non-slip rubber pad 200 is attached to the bottom end of the bottom shell 107, covering the screw connection holes. The bottom surface of the non-slip rubber pad 200 is used to adhere to the gas stove panel. Typically, the top surface of the non-slip rubber pad 200 is smooth, while the bottom surface of the non-slip rubber pad 200 has a convex-concave textured surface. As a mature gasket technology, the non-slip rubber pad 200 is easy to obtain, washable, and reusable, making it highly practical. For example, the anti-slip rubber pad 200 is a non-slip silicone pad. Utilizing the natural adhesiveness of silicone, it is non-slip, stable, and not prone to loosening. It can be placed anywhere, is waterproof, washes well, and remains intact. It does not melt at high temperatures or become stiff at low temperatures, and its surface is smooth and easy to clean. Silicone anti-slip pads are made from silicone raw materials and are highly active adsorbent materials. Their open porous structure offers strong adsorption, allowing them to absorb a variety of substances. They are also chemically stable, non-toxic, and odorless, making them a very safe and environmentally friendly material. Silicone anti-slip pads offer excellent tension, flexibility, and insulation properties. Another example is a nano-anti-slip pad. The top and bottom surfaces of the anti-slip rubber pad 200 have several nano-scale pores, providing strong adsorption. The material can be PU, PVC, or other materials. The anti-slip rubber pad 200 folds and deforms accordingly with the power cover 109. One end of the power cover 109 removably snaps onto the bottom of the bottom housing 107.

[0057] Next, the working principle and usage of the automatic flameout device of the present invention are introduced:

[0058] 1. When the timer is turned off, first rotate the reset operating knob 101 180 degrees counterclockwise (to store energy in the torsion spring 30). When the knob is turned counterclockwise until a stop portion 1014 hits the limit pin 40, use the guide slope to push the limit pin 40 open, thus turning on the switch. The limit pin 40 then extends under the reset force of the reset spring and stops on the right side of the stop portion 1014 (i.e., its stop surface).

[0059] 2. Place the automatic flameout device cover on the gas stove switch, set the time, and press the "Start" button;

[0060] 3. When the time is up, the controller controls the electromagnet to be energized. When the electromagnet is energized, a magnetic attraction is generated so that the limit pin 40 moves away from the stop portion 1014 to release the lock on the stop portion 1014. The rotating member 1011 can be reset and rotated (rotated to the right) under the reset force of the torsion spring 30 to achieve automatic shutdown.

[0061] The design focus of the present invention is that it mainly utilizes the settings of the reset operation knob 101, the rotating part 1011, the torsion spring 30, and the limit mechanism, and realizes automatic flameout by means of the reset rotation under the reset force of the torsion spring 30. There is no need to use a motor to provide rotational power, the structure becomes simpler, and it is conducive to reducing costs. Moreover, the electromagnet only needs to be energized for a moment, and the power consumption is very small. The automatic flameout device can be used for a long time after a single charge, which effectively solves the problem that the automatic flameout device of traditional technology needs to be frequently charged. At the same time, by setting an assembly position at the bottom of the rotating part 1011, the automatic flameout device cover can be placed on the switch of the gas stove when in use. It is easy to operate and provides a good user experience.

[0062] Furthermore, the bottom of the rotating part 1011 is detachably equipped with a universal knob assembly, and the universal knob assembly includes a knob, a first insert and a second insert. The knob, the first insert and the second insert can each provide a different assembly slot. In this way, after the user purchases this automatic flameout device, if the three assembly slots are applicable, it can be used directly. If the second assembly slot is applicable, the second insert can be unplugged before use. If the first assembly slot is applicable, the first insert (together with the second insert) can be unplugged before use. This satisfies the installation application of an automatic flameout device that is applicable to gas stove knobs of multiple specifications, is conducive to mass production, can better control inventory and response to market demand cycles, and is simple for users to purchase.

[0063] In addition, the anti-slip rubber pad can be firmly adsorbed on the gas stove panel, has a simple structure, is easy to disassemble and assemble, and is convenient for sanitary cleaning. Moreover, the anti-slip rubber pad is a gasket with mature technology, is easy to obtain, can be washed and reused many times, is highly practical, and is conducive to the installation and promotion of automatic flameout devices.

[0064] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An automatic flame-off device, characterized in that: Included case; A reset operation knob rotatably disposed on the top of the housing; A rotating member, a stopper is provided on its circumferential side, and a mounting position is provided on its bottom; the rotating member is located below the reset operation knob and the two are connected so as to be able to rotate synchronously; A torsion spring, used for providing a resetting rotation force to the resetting operation knob; A limit mechanism, comprising a limit pin, a return spring and an electromagnet, wherein the return spring causes one end of the limit pin to stop at one side of the stop portion to limit the rotation of the rotating member; Timer, which is used to set duration or time point; A power source, which is used to supply power to the automatic flameout device; A controller is connected to the power supply and the timer respectively, and the controller controls the electromagnet to be energized according to the duration or time point set by the timer; when the electromagnet is energized, a magnetic attraction is generated so that the limit pin releases the lock on the stopper, and the rotating part can be reset and rotated under the reset force of the torsion spring to realize automatic shutdown.

2. The automatic flame-off device according to claim 1, characterized in that: The stop parts are arranged with two circumferential spacings on the circumferential side of the rotating part, one side of the stop part is a stop surface (usually a vertical surface arranged along the radial direction), and the other side of the stop part is a guide inclined surface, and the limit pin stops at the stop surface; the limit pin is arranged to be telescopically horizontally, and it approaches or moves away from the stop part in the radial direction.

3. The automatic flame-off device according to claim 1, characterized in that: The shell comprises an upper shell and a bottom shell, the upper shell cover is arranged above the bottom shell, a through hole is arranged at the bottom of the bottom shell, and the assembly position is arranged above the through hole.

4. The automatic flame-off device according to claim 3, characterized in that: A sinking cavity is recessed on the top of the upper shell, and the sinking cavity is arranged above the through hole. An axial hole is opened on the bottom wall of the sinking cavity and passes through the interior of the shell. The reset operation knob is located in the sinking cavity, and the rotating member is located inside the shell. Moreover, the rotating member forms a coaxial connection with the reset operation knob through the axial hole.

5. The automatic flame-off device according to claim 4, characterized in that: The torsion spring is arranged in the sinking cavity, and the torsion spring includes a spring body and a first torsion arm and a second torsion arm connected to both ends of the spring body. The spring body is sleeved on the reset operation knob, the first torsion arm acts on the reset operation knob, and the second torsion arm acts on the upper shell.

6. The automatic flame-off device according to claim 4, characterized in that: The lower end surface of the bottom wall of the sinking cavity is provided with an annular convex rib, and the annular convex rib is arranged around the axial hole. The upper end surface of the rotating part is rotatably contacted with the annular convex rib, so that a gap is maintained between the upper end of the rotating part and the lower end surface of the bottom wall of the sinking cavity.

7. The automatic flame-off device according to claim 1, characterized in that: The bottom of the rotating member is detachably equipped with a universal knob assembly; the universal knob assembly includes a knob, a first insert and a second insert; the knob has a toggle portion and a connecting portion connected below the toggle portion, the toggle portion extends into the assembly position to achieve the positioning of the knob on the rotating member, thereby allowing the knob to rotate synchronously with the rotating member, and the bottom of the connecting portion is upwardly recessed with a first assembly groove, and the first assembly groove is a regular polygon; the first insert is pluggable and embedded in the first assembly groove, the outer circumference of the first insert matches the inner circumference of the first assembly groove, and the bottom of the first insert is upwardly recessed with a second assembly groove, and the second assembly groove is in the form of a cut circle; the second insert is pluggable and embedded in the second assembly groove, the outer circumference of the second insert matches the inner circumference of the second assembly groove, and the bottom of the second insert is upwardly recessed with a third assembly groove, and the third assembly groove is in the form of a cut circle.

8. The automatic flame-off device according to claim 7, characterized in that: An operating groove for facilitating the removal of the second insert is provided on the side of the second assembly groove.

9. The automatic flame-off device according to claim 8, characterized in that: The operating groove passes through the second assembly groove through the side notch, and the operating groove extends beyond one end or both ends of the side notch to serve as an auxiliary groove for pulling out the first insert.

10. The automatic flame-off device according to claim 3, characterized in that: The bottom end surface of the bottom shell is affixed with an anti-skid rubber pad, the top end surface and the bottom end surface of the anti-skid rubber pad are both removable adsorption surfaces, the top end surface of the anti-skid rubber pad is adsorbed on the bottom end surface of the bottom shell, and the bottom end surface of the anti-skid rubber pad is used to adsorb the gas stove panel.

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