Temperature limiter structure for preventing rotation of magnet lever and electric rice cooker

Abstract

The utility model relates to electric rice cooker technical field discloses a kind of temperature limiter structure and electric rice cooker of anti-magnet lever rotation, including inner pot and the magnetic steel lever being set to the lower portion of inner pot, and the bottom of inner pot is provided with magnetic steel limiter assembly between one end of magnetic steel lever, and magnetic steel limiter assembly includes magnet assembly and magnet lever, magnet lever is connected between magnetic steel lever and magnet assembly, first limit slot is provided on magnet assembly, magnet lever upper portion is positioned in first limit slot and is limited, second limit slot is provided on magnetic steel lever, and magnet lever lower portion is positioned in second limit slot and is limited.The utility model structure is simple, and production cost is low;Setting anti-rotation boss on the original magnetic steel lever structure, so that magnet lever is not prone to perpendicular overturning movement, so that magnet assembly is not prone to inclination when being attracted with ferrite, contact area is large when both are attracted, and attraction is more stable, improve the cooking effect and reliability of electric rice cooker.

Description

Technical Field

[0001] This utility model relates to the field of rice cooker technology, and more specifically, to a temperature limiter structure and a rice cooker that prevents the rotation of a magnetic lever. Background Technology

[0002] In mechanical rice cookers, the "magnetic temperature limiter assembly" is the core actuator controlling the cooking temperature and heat preservation function. Its operational stability directly determines the cooking effect and reliability of the rice cooker. The key performance characteristic of this assembly lies in ensuring a tight and uniform contact surface between the magnet and the permanent magnet. Any magnetic deviation can lead to temperature control malfunction, resulting in problems such as undercooked rice or overheating. Industry experts generally recognize that the causes of magnetic deviation can be summarized into three main categories: first, inherent dimensional or material defects in the component during manufacturing; second, the "magnetic lever" undergoing repeated cooking-heat preservation state switching, resulting in reduced contact area and uneven contact with the magnet due to its own rotation; and third, structural displacement caused by external impacts during product transportation or use.

[0003] The second cause, stemming from the inherent mechanical motion during normal product use, has become a major issue affecting long-term reliability. To suppress lever rotation, traditional designs typically involve adding independent anti-rotation components (such as clips or pins) or designing complex limiting structures. However, this increases the complexity of assembly processes and the number of parts, raises production costs, and introduces more quality fluctuation risks in multiple stages of manufacturing and assembly, making the conflict between precision control and cost control increasingly prominent.

[0004] Therefore, the industry urgently needs a simpler and more reliable design that can completely prevent the rotation of the magnetic lever, simplify the component structure, reduce the sensitivity of manufacturing to the process, and effectively control costs, thereby fundamentally improving the performance consistency of the temperature limiter component. Utility Model Content

[0005] To address at least one of the aforementioned problems, this utility model provides a temperature limiter structure to prevent the rotation of a magnetic lever, comprising an inner pot and a magnetic lever disposed below the inner pot. A magnetic limiter assembly is disposed between one end of the magnetic lever and the bottom of the inner pot. The magnetic limiter assembly includes a magnet assembly and a magnetic lever, with the magnetic lever connected between the magnetic lever and the magnet assembly. The magnet assembly has a first limiting groove, within which the upper part of the magnetic lever is positioned for limiting. The magnetic lever has a second limiting groove, within which the lower part of the magnetic lever is positioned for limiting. The second limiting groove contains an anti-rotation protrusion to prevent the magnetic lever from vertically flipping. This utility model has a simple structure and low production cost. By adding an anti-rotation protrusion to the original magnetic lever structure, the magnetic lever is less prone to vertical flipping, and the magnet assembly is less likely to tilt when attracted to the ferrite. The large contact area during attraction results in a more stable attraction, improving the cooking effect and reliability of the rice cooker.

[0006] Optionally, two anti-rotation protrusions are symmetrically arranged.

[0007] Optionally, an inner groove wall is provided on the inner side of the second limiting groove, and one end of the anti-rotation protrusion is integrally connected to the inner groove wall.

[0008] Optionally, the anti-rotation protrusion has an arc-shaped protrusion on the side near the magnetic lever.

[0009] Optionally, the magnetic limiter assembly further includes a mounting bracket, a compression spring, and a ferrite that can attract / separate from the magnet assembly. The mounting bracket is fixedly connected to the outer bottom of the inner pot, the ferrite is fixedly disposed on the mounting bracket, the mounting bracket is provided with an inner cavity, the magnet assembly can move vertically within the inner cavity, and the compression spring abuts against the mounting bracket and the magnet assembly.

[0010] Optionally, the magnet assembly includes a magnet body and a mounting plate, the magnet body being connected to the side of the mounting plate near the ferrite, and the compression spring abutting between the mounting bracket and the mounting plate.

[0011] Optionally, the mounting plate is provided with an annular positioning groove for positioning the lower end of the compression spring.

[0012] Optionally, the magnet assembly is provided with a first engaging portion, the upper part of the magnet lever is provided with a first slot that engages with the first engaging portion, the magnetic lever is provided with a second engaging portion, and the lower part of the magnet lever is provided with a second slot that engages with the second engaging portion.

[0013] Optionally, the temperature limiter structure for preventing the rotation of the magnetic lever also includes an outer pot frame, with the inner pot sleeved inside the outer pot frame, the magnetic lever hinged to the outer pot frame, a micro switch provided on the outer pot frame, and a protrusion for activating the micro switch provided on the lower side of the magnetic lever.

[0014] Compared to existing technologies, the anti-magnetic lever rotation temperature limiter structure in this utility model is simple in structure and has low production cost. The anti-rotation protrusion on the original magnetic lever structure prevents the magnetic lever from vertically flipping, making it less prone to tilting when the magnet assembly is attracted to the ferrite. The larger contact area during attraction results in a more stable connection, improving the cooking effect and reliability of the rice cooker. An inner wall is provided on the inner side of the second limiting groove, and one end of the anti-rotation protrusion is integrally connected to the inner wall. This integral connection method simplifies the structure, reduces the number of parts, and lowers production and assembly costs.

[0015] In addition, this utility model also provides a rice cooker, including the above-mentioned temperature limiter structure for preventing the rotation of the magnetic lever. This rice cooker also has the same beneficial effects of the above-mentioned temperature limiter structure for preventing the rotation of the magnetic lever, which will not be described in detail here. Attached Figure Description

[0016] Figure 1 This is a perspective view of the structure of the temperature limiter for preventing magnetic lever rotation according to this utility model.

[0017] Figure 2 For this Figure 1 Enlarged view of section A in the middle;

[0018] Figure 3 This is a cross-sectional view of the anti-magnetic lever rotation of this utility model;

[0019] Figure 4 for Figure 3 Enlarged view of section B;

[0020] Figure 5 This is a schematic diagram of the structure of the temperature limiter for preventing the rotation of the magnetic lever of this utility model after the ferrite has lost its magnetism.

[0021] Figure 6 This is a schematic diagram of the magnetic lever portion of the temperature limiter structure for preventing rotation of the magnetic lever according to this utility model.

[0022] Figure 7 for Figure 6 Enlarged view of section C;

[0023] Figure 8 This is a schematic diagram of the magnetic lever structure of the temperature limiter for preventing rotation of the magnetic lever according to this utility model.

[0024] Figure 9This is a schematic diagram of the second limiting groove of the temperature limiter structure for preventing magnetic lever rotation according to this utility model.

[0025] Figure 10 This is a schematic diagram of the mounting plate of the temperature limiter structure for preventing magnetic lever rotation according to this utility model.

[0026] The component names corresponding to the various labels in the figure are as follows: 1 is the inner pot, 2 is the magnetic lever, 201 is the second limiting groove, 2011 is the inner pot wall, 202 is the anti-rotation protrusion, 2021 is the arc-shaped protrusion, 203 is the second engaging part, 204 is the protrusion, 3 is the mounting bracket, 301 is the inner cavity, 4 is the magnet assembly, 41 is the magnet body, 42 is the mounting plate, 421 is the annular positioning groove, 401 is the first limiting groove, 402 is the first engaging part, 5 is the magnetic lever, 501 is the first slot, 502 is the second slot, 6 is ferrite, 60 is the outer pot frame, 7 is the compression spring, 8 is the micro switch, and 9 is the electric heating plate. Detailed Implementation

[0027] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0028] In the description of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship when the product is in normal use.

[0029] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0030] See Figures 1-10This utility model provides a temperature limiter structure to prevent the rotation of a magnetic lever, including an inner pot 1 and a magnetic lever 2 disposed below the inner pot 1. A magnetic limiter assembly is disposed between one end of the magnetic lever 2 and the bottom of the inner pot 1. The magnetic limiter assembly includes a magnet assembly 4 and a magnetic lever 5. The magnetic lever 5 is connected between the magnetic lever 2 and the magnet assembly 4. A first limiting groove 401 is provided on the magnet assembly 4. The upper part of the magnetic lever 5 is placed in the first limiting groove 401 for limiting. The magnetic lever 2 is provided with... The second limiting groove 201 is used to limit the lower part of the magnetic lever 5. The second limiting groove 201 is provided with an anti-rotation protrusion 202 to prevent the magnetic lever 5 from vertically flipping. The present invention has a simple structure and low production cost. The anti-rotation protrusion is set on the original magnetic lever structure, which makes it difficult for the magnetic lever to move vertically. It also makes it difficult for the magnetic assembly to tilt when it is attracted to the ferrite. The contact area between the two is large when they are attracted, and the attraction is more stable, which improves the cooking effect and reliability of the rice cooker.

[0031] Specifically, this embodiment adds an anti-rotation protrusion 202, which cooperates with the lower part of the magnetic lever 5 to directly restrict its vertical rotation movement, effectively solving the problem of vertical rotation of the magnetic lever 5 during movement. This ensures that the magnetic assembly 4 always maintains the correct posture, i.e., displacement in the vertical or approximately vertical direction, when it moves. This makes the contact surface of the magnetic assembly 4 parallel and aligned when it attracts the ferrite, maximizing the contact area and ensuring sufficient magnetic attraction to improve the cooking effect and reliability of the rice cooker. Figure 4 The arrow at the center indicates the direction in which the magnetic lever 5 flips vertically.

[0032] See Figure 1 , Figure 2 and Figure 9 Two anti-rotation protrusions 202 are symmetrically arranged to enhance the anti-rotation effect. At the same time, the two anti-rotation protrusions 202 can also prevent the magnetic lever 5 from rotating horizontally, thus making the magnetic lever 5 move more smoothly when moving vertically. The inner side of the second limiting groove 201 is provided with an inner groove wall 2011. One end of the anti-rotation protrusion 202 is integrally connected to the inner groove wall 2011. The integral connection method is simple in structure, reduces the number of parts, and reduces production and assembly costs. In addition, since the integral structure is a whole, there is no problem of "loosening". This ensures that the position of the anti-rotation protrusion 202 is absolutely fixed and never changes, thus always providing a precise limiting function. It also enhances the structural strength and overall reliability of the anti-rotation protrusion 202, preventing it from breaking or deforming under frequent mechanical impacts, thereby ensuring the long-term effectiveness of the limiting function.

[0033] See Figure 1 , Figure 2 and Figure 9The anti-rotation protrusion 202 has an arc-shaped protrusion 2021 on the side near the magnetic lever 5. The arc-shaped protrusion 2021 plays a limiting role for the magnetic lever 5. When the end of the arc-shaped protrusion 2021 contacts the magnetic lever 5, it is approximately point contact, resulting in a good limiting effect. The arc-shaped design makes it less likely to scratch or damage the magnetic lever 5.

[0034] See Figures 3-5 The magnetic limiter assembly also includes a mounting bracket 3, a compression spring 7, and a ferrite 6 that can be attracted / separated from the magnet assembly 4. The mounting bracket 3 is fixedly connected to the outer bottom of the inner pot 1, and the ferrite 6 is fixedly mounted on the mounting bracket 3. The mounting bracket 3 is provided with an inner cavity 301, and the magnet assembly 4 can move vertically within the inner cavity 301. The compression spring 7 abuts against the mounting bracket 3 and the magnet assembly 4. When the rice cooker is heating, the ferrite 6 is magnetic, that is, it is attracted to the magnet assembly 4. When the temperature of the inner pot reaches the preset value, usually 103±2℃, the ferrite 6 loses its magnetism. At this time, the magnet assembly 4 is displaced downward under the elastic force of the compression spring 7. The magnet assembly 4 drives the magnetic lever 2 to rotate through the magnetic lever 5. When the magnetic lever 2 rotates, it drives the micro switch 8 to act, controlling the heating plate 9 at the bottom of the inner pot to stop cooking.

[0035] See Figures 3-5 The magnet assembly 4 includes a magnet body 41 and a mounting plate 42. The magnet body 41 is fixedly connected to the mounting plate 42 on the side near the ferrite 6. The magnet body 41 is fixed to the mounting plate 42 by bolts, high-temperature adhesive, etc. The compression spring 7 abuts between the mounting bracket 3 and the mounting plate 42. By driving the mounting plate 42 to move vertically, it drives the magnet body 41 to move synchronously. The structure is reasonably designed. The mounting plate 42 is provided with an annular positioning groove 421 for positioning the lower end of the compression spring 7. The lower end of the compression spring 7 falls into the annular positioning groove 421 for positioning, so that the compression spring 7 and the mounting plate 42 are firmly abutted. The annular abutment makes the mounting plate 42 less likely to tilt, so that the entire magnet assembly is less likely to tilt when it is attracted to the ferrite. The contact area between the two is large when they are attracted, and the attraction is more stable, which improves the cooking effect and reliability of the rice cooker.

[0036] See Figures 7-10 The magnet assembly 4 is provided with a first engaging part 402, the upper part of the magnet lever 5 is provided with a first slot 501 that engages with the first engaging part 402, the magnet lever 2 is provided with a second engaging part 203, and the lower part of the magnet lever 5 is provided with a second slot 502 that engages with the second engaging part 203. The above engaging structure can efficiently and reliably convert the vertical or approximately vertical movement of the magnet assembly 4 into the rotational movement of the magnet lever 2. At the same time, there is a gap between the first engaging part 402 in the first slot 501 and the second engaging part 203 in the second slot 502, that is, there is a necessary "movement margin" to adapt to the assembly and ensure smooth operation.

[0037] See Figure 1 and Figure 3 The temperature limiter structure for preventing the rotation of the magnetic lever also includes an outer pot frame 60, an inner pot 1 fitted inside the outer pot frame 60, a magnetic lever 2 hinged to the outer pot frame 60, a micro switch 8 on the outer pot frame 60, and a protrusion 204 on the lower side of the magnetic lever 2 for triggering the micro switch 8. When the magnetic lever 2 rotates, it triggers the contacts of the micro switch 8 through the protrusion 204. The micro switch 8 is sensitive and can stop the cooking heating in time after the ferrite 6 loses its magnetism, making it reliable in use.

[0038] The anti-rotation thermostat structure of the magnetic lever in this utility model is simple in structure and low in production cost. The anti-rotation protrusion is set on the original magnetic lever structure, which makes it difficult for the magnetic lever to rotate vertically. This makes it difficult for the magnetic assembly to tilt when it is attracted to the ferrite. The contact area between the two is large when they are attracted, and the attraction is more stable, which improves the cooking effect and reliability of the rice cooker. The inner wall 2011 is provided on the inner side of the second limiting groove 201. One end of the anti-rotation protrusion 202 is integrally connected to the inner wall 2011. The integral connection method is simple in structure, reduces the number of parts, and has low production and assembly costs.

[0039] In addition, this utility model also provides a rice cooker, including the above-mentioned temperature limiter structure for preventing the rotation of the magnetic lever. This rice cooker also has the same beneficial effects of the above-mentioned temperature limiter structure for preventing the rotation of the magnetic lever, which will not be described in detail here.

[0040] In the description of this disclosure, it should be understood that the terms "upper", "lower", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0041] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0042] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0043] In this disclosure, unless otherwise expressly specified and limited, the first feature being "on" or "below" the second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium.

[0044] It should be noted that when a component is described as being "set on" another component, it can be directly on the other component or there may be an intervening component. When a component is described as "connected to another component," it can be directly connected to the other component or there may be an intervening component. Furthermore, when a component is described as being "fixedly connected" to another component, the connection can be detachable or non-detachable, such as through socketing, snap-fitting, integral molding, welding, etc., which are achievable in conventional technologies and will not be elaborated upon here.

[0045] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A temperature limiter structure to prevent rotation of a magnetic lever, characterized in that, The device includes an inner pot (1) and a magnetic lever (2) disposed below the inner pot (1). A magnetic limiter assembly is disposed between one end of the magnetic lever (2) and the bottom of the inner pot (1). The magnetic limiter assembly includes a magnet assembly (4) and a magnetic lever (5). The magnetic lever (5) is connected between the magnetic lever (2) and the magnet assembly (4). A first limiting groove (401) is disposed on the magnet assembly (4). The upper part of the magnetic lever (5) is placed in the first limiting groove (401) for limiting. A second limiting groove (201) is disposed on the magnetic lever (2). The lower part of the magnetic lever (5) is placed in the second limiting groove (201) for limiting. An anti-rotation protrusion (202) is disposed in the second limiting groove (201) to prevent the magnetic lever (5) from vertically flipping.

2. The temperature limiter structure for preventing magnetic lever rotation according to claim 1, characterized in that, The anti-rotation protrusion (202) is symmetrically arranged in two parts.

3. The temperature limiter structure for preventing magnetic lever rotation according to claim 1, characterized in that, The inner side of the second limiting groove (201) is provided with an inner groove wall (2011), and one end of the anti-rotation protrusion (202) is integrally connected to the inner groove wall (2011).

4. The temperature limiter structure for preventing magnetic lever rotation according to claim 1, characterized in that, The anti-rotation protrusion (202) has an arc-shaped protrusion (2021) on the side near the magnetic lever (5).

5. The temperature limiter structure for preventing magnetic lever rotation according to claim 1, characterized in that, The magnetic limiter assembly also includes a mounting bracket (3), a compression spring (7), and a ferrite (6) that can attract / separate from the magnet assembly (4). The mounting bracket (3) is fixedly connected to the outer bottom of the inner pot (1), and the ferrite (6) is fixedly disposed on the mounting bracket (3). The mounting bracket (3) is provided with an inner cavity (301). The magnet assembly (4) can move vertically within the inner cavity (301), and the compression spring (7) abuts against the mounting bracket (3) and the magnet assembly (4).

6. The temperature limiter structure for preventing magnetic lever rotation according to claim 5, characterized in that, The magnet assembly (4) includes a magnet body (41) and a mounting plate (42). The magnet body (41) is connected to the mounting plate (42) on the side near the ferrite (6). The compression spring (7) abuts against the mounting bracket (3) and the mounting plate (42).

7. The temperature limiter structure for preventing magnetic lever rotation according to claim 6, characterized in that, The mounting plate (42) is provided with an annular positioning groove (421) for positioning the lower end of the compression spring (7).

8. The temperature limiter structure for preventing magnetic lever rotation according to claim 1, characterized in that, The magnet assembly (4) is provided with a first engaging part (402), the upper part of the magnet lever (5) is provided with a first slot (501) that engages with the first engaging part (402), the magnet lever (2) is provided with a second engaging part (203), and the lower part of the magnet lever (5) is provided with a second slot (502) that engages with the second engaging part (203).

9. The temperature limiter structure for preventing rotation of the magnetic lever according to any one of claims 1-8, characterized in that, It also includes an outer pot frame (60), the inner pot (1) is sleeved on the inner side of the outer pot frame (60), the magnetic lever (2) is hinged on the outer pot frame (60), the outer pot frame (60) is provided with a micro switch (8), and the magnetic lever (2) is provided with a protrusion (204) on the lower side for triggering the micro switch (8).

10. An electric rice cooker, characterized in that, Including the temperature limiter structure for preventing magnetic lever rotation as described in any one of claims 1-9.

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