A magnetic steel temperature limiter

Abstract

The present invention provides a magnetic steel temperature limiter, comprising an aluminum cover, a soft magnet, a soft support, a hard magnet, a hard support, an inner spring, a small cup and a pull rod, wherein the soft magnet, the soft support, the hard magnet, the hard support and the inner spring are all located inside the small cup, one end of the pull rod is fixedly connected to the hard support, the other end of the pull rod passes through the bottom of the small cup and is movably arranged, the inner spring is arranged between the hard support and the aluminum cover, the soft magnet and the hard magnet are both located inside the inner spring, the hard magnet is detachably mounted on the surface of the hard support near the opening of the small cup, the soft support is detachably mounted on the inner side of the aluminum cover, the soft magnet is detachably mounted on the soft support, and the aluminum cover is detachably wrapped around the opening of the small cup. The present invention can remove the aluminum cover from the small cup, and then replace the failed soft magnet or demagnetized hard magnet to improve resource utilization efficiency.

Description

Technical Field

[0001] The present invention relates to the field of magnetic steel temperature limiters, and in particular to a magnetic steel temperature limiter. Background Art

[0002] The magnetic temperature limiter is a temperature controller with hard and soft magnets. It is mostly used in rice cookers. It is a mechanical device that can automatically cut off the power of the rice cooker. It is mainly composed of non-magnetic soft magnets and permanent hard magnets.

[0003] When hard magnet is close to soft magnet at room temperature, the magnetic field of the hard magnet will magnetize the soft magnet, and then the two will be attracted to each other. When the temperature rises to the Curie temperature of the soft magnet, the magnetism of the soft magnet will decrease or even disappear, and the two will separate under the elastic force of the internal spring; and when the temperature drops below the Curie temperature of the soft magnet, the soft magnet can be magnetized again under the action of the magnetic field.

[0004] After a period of use, existing magnetic temperature limiters can experience soft magnet failure or hard magnet demagnetization, preventing the soft and hard magnets from bonding and preventing rice from being cooked. In such cases, the common practice is to replace the entire magnetic temperature limiter to restore proper function. However, replacing the entire magnetic temperature limiter can easily waste resources, and its structure needs improvement. Summary of the Invention

[0005] Based on this, in order to overcome the problem that the existing magnetic steel temperature limiter may experience soft magnetic failure or hard magnetic demagnetization, and can only be replaced as a whole, which easily leads to waste of resources, the present invention provides a magnetic steel temperature limiter, and its specific technical solution is as follows:

[0006] A magnetic steel temperature limiter comprises an aluminum cover, a soft magnet, a soft support, a hard magnet, a hard support, an inner spring, a small cup and a pull rod, wherein the soft magnet, the soft support, the hard magnet, the hard support and the inner spring are all located inside the small cup, one end of the pull rod is fixedly connected to the hard support, and the other end of the pull rod passes through the bottom of the small cup and is movably arranged, the inner spring is arranged between the hard support and the aluminum cover, the soft magnet and the hard magnet are both located inside the inner spring, the hard magnet is detachably mounted on the surface of the hard support close to the opening of the small cup, the soft support is detachably mounted on the inner side of the aluminum cover, the soft magnet is detachably mounted on the soft support, and the aluminum cover is detachably wrapped around the opening of the small cup.

[0007] Since the hard magnet is detachably mounted on the surface of the hard support close to the opening of the small cup, the soft support is detachably mounted on the inner side of the aluminum cover, the soft magnet is detachably mounted on the soft support, and the aluminum cover is detachably wrapped around the opening of the small cup, when the soft magnet of the magnetic steel temperature limiter fails or the hard magnet is demagnetized, the aluminum cover can be removed from the small cup, and then the failed soft magnet or demagnetized hard magnet can be replaced, so as to improve resource utilization efficiency and reduce living costs.

[0008] Optionally, the magnetic steel temperature limiter also includes a plurality of thin-sheet rings, and a plurality of first limit blocks are provided on the surface of the soft support close to the hard support. The plurality of first limit blocks are evenly distributed circumferentially with the center of the soft support as the center of the circle, and the plurality of thin-sheet rings are all clamped on the plurality of first limit blocks.

[0009] Optionally, a plurality of second limiting blocks are provided on the outer peripheral edge of the hard support, and the plurality of second limiting blocks are evenly distributed circumferentially with the center of the hard support as the center of the circle.

[0010] Optionally, a plurality of the thin-sheet rings may be snap-connected to a plurality of the second limiting blocks.

[0011] Optionally, the plurality of thin-sheet rings are all made of non-magnetic steel.

[0012] Optionally, the periphery of the opening of the small cup has an outwardly protruding edge.

[0013] Optionally, the aluminum cover is wrapped around the outwardly protruding edge of the opening of the small cup and is threadedly connected to the outwardly protruding edge of the opening of the small cup.

[0014] Optionally, the soft magnetic card is connected to the soft support.

[0015] Optionally, the hard magnetic card is connected to the soft support.

[0016] Optionally, the magnetic steel temperature limiter also includes an outer spring and a large cup, wherein the outer spring is sleeved on the outer side wall of the small cup and one end of the outer spring is clamped on the outward protruding edge of the opening of the small cup, and the other end of the outer spring is connected to the bottom surface of the inside of the large cup.

[0017] Optionally, the outer spring and the small cup are both located in the large cup. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention can be further understood from the following description in conjunction with the accompanying drawings. The components in the figures are not necessarily drawn to scale, but rather the emphasis is placed on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0019] Figure 1This is a schematic diagram of the overall structure of a magnetic steel temperature limiter in one embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the explosion structure of a magnetic steel temperature limiter in one embodiment of the present invention;

[0021] Figure 3 The figure is a schematic diagram of the structural relationship between a soft support and a first limiting block of a magnetic steel temperature limiter in one embodiment of the present invention.

[0022] Description of reference numerals:

[0023] 1. Aluminum cover; 2. Soft magnet; 3. Soft support; 4. Hard magnet; 5. Hard support; 6. Inner spring; 7. Small cup; 8. Pull rod; 9. Outer spring; 10. Large cup; 11. First limit block. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with its embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and do not limit the scope of protection of the present invention.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] The "first" and "second" in the present invention do not represent specific quantities and orders, but are only used to distinguish names.

[0028] like Figure 1As shown, a magnetic steel temperature limiter in one embodiment of the present invention includes an aluminum cover 1, a soft magnet 2, a soft support 3, a hard magnet 4, a hard support 5, an inner spring 6, a small cup 7 and a pull rod 8. The soft magnet 2, soft support 3, hard magnet 4, hard support 5 and inner spring 6 are all located inside the small cup 7, one end of the pull rod 8 is fixedly connected to the hard support 5, and the other end of the pull rod 8 passes through the bottom of the small cup 7 and is movably arranged. The inner spring 6 is arranged between the hard support 5 and the aluminum cover 1, the soft magnet 2 and the hard magnet 4 are both located in the inner spring 6, the hard magnet 4 is detachably mounted on the surface of the hard support 5 close to the opening of the small cup 7, the soft support 3 is detachably mounted on the inner side of the aluminum cover 1, the soft magnet 2 is detachably mounted on the soft support 3, and the aluminum cover 1 is detachably wrapped around the opening of the small cup 7.

[0029] Since the hard magnet 4 is detachably mounted on the surface of the hard support 5 close to the opening of the small cup 7, the soft support 3 is detachably mounted on the inner side of the aluminum cover 1, the soft magnet 2 is detachably mounted on the soft support 3, and the aluminum cover 1 is detachably wrapped around the opening of the small cup 7, when the soft magnet 2 of the magnetic steel temperature limiter fails or the hard magnet 4 is demagnetized, the aluminum cover 1 can be removed from the small cup 7, and then the failed soft magnet 2 or the demagnetized hard magnet 4 can be replaced to improve resource utilization efficiency and reduce living costs.

[0030] In one embodiment, Figure 1 as well as Figure 2 As shown, the magnetic steel temperature limiter also includes an outer spring 9 and a large cup 10. The outer spring 9 is sleeved on the outer side wall of the small cup 7 and one end of the outer spring 9 is clamped on the outward protruding edge of the opening of the small cup 7. The other end of the outer spring 9 is connected to the bottom surface of the inside of the large cup 10. The outer spring 9 and the small cup 7 are both located in the large cup 10.

[0031] When the inner container is placed in the rice cooker, the small cup 7 sinks under the gravity of the inner container. At this time, the rice cooker's seesaw switch (on / off button) is pressed to push the pull rod 8, causing the hard support 5 and hard magnet 4 to move toward the soft magnet 2. The soft magnet 2 and hard magnet 4 attract, the seesaw switch is turned on, and the rice cooker begins to heat. When the rice cooker is cooked, the temperature of the soft magnet 2 exceeds the Curie temperature, the soft magnet 2 loses its magnetism, and the hard magnet 4 falls and separates from the soft magnet 2 under the elastic force of the inner spring 6 and the gravity of the hard magnet 4 and the hard support 5. Pushing the seesaw switch turns off the rice cooker. When the inner container is removed from the rice cooker, the small cup 7 floats upward under the action of the outer spring 9, which drives the seesaw motion, making it impossible for the seesaw switch to attract the soft magnet 2 and hard magnet 4. By providing the outer spring 9 and the large cup 10, it is ensured that the seesaw switch cannot attract the soft magnet 2 and hard magnet 4 even when the inner container is not placed in the rice cooker, preventing the rice cooker from drying out.

[0032] After an electric rice cooker has been used for a long time, the elastic force of the inner spring 6 in the magnetic steel temperature limiter tends to weaken. When the electric rice cooker has cooked rice and the temperature of the soft magnet 2 exceeds the Curie temperature, due to the weakening of the elastic force of the inner spring 6, the hard magnet 4 may not be able to fall and separate from the soft magnet 2 under the elastic force of the inner spring 6 and the gravity of the hard magnet 4 and the hard support 5, and then push the rocker switch to cut off the power to the electric rice cooker. In this case, the problem of burnt rice may occur. At this time, the general practice is to replace the inner spring 6 or the entire magnetic steel temperature limiter to enable the electric rice cooker to operate normally. However, if you replace the inner spring 6, you need to find a new inner spring 6 that is consistent with the original inner spring 6 model, which is time-consuming and labor-intensive. However, if you replace the entire magnetic steel temperature limiter, it is easy to cause a waste of resources.

[0033] In order to solve the above problem, in one embodiment, as Figure 3 As shown, the magnetic steel temperature limiter also includes a plurality of thin circular rings (not shown in the figure), and a plurality of first limit blocks 11 are provided on the surface of the soft support 3 close to the hard support 5. The plurality of first limit blocks 11 are evenly distributed circumferentially with the center of the soft support 3 as the center of the circle, and the plurality of thin circular rings are clamped on the plurality of first limit blocks 11. The outer peripheral edge of the hard support 5 is provided with a plurality of second limit blocks (not shown in the figure), and the plurality of second limit blocks are evenly distributed circumferentially with the center of the hard support 5 as the center of the circle, and the plurality of thin circular rings can be clamped on the plurality of second limit blocks. Specifically, the inner diameter of the plurality of thin circular rings is equal to the outer diameter of the circle formed by the plurality of second limit blocks.

[0034] When the elastic force of the inner spring 6 becomes weak, the weight of the hard support 5 can be increased by removing the thin ring connected to the multiple first limit blocks 11 and then connecting it to the multiple second limit blocks, thereby compensating for the lost elastic force of the inner spring 6. When the rice is cooked in the rice cooker and the temperature of the soft magnet 2 exceeds the Curie temperature, the hard magnet 4 can fall down and separate from the soft magnet 2 under the elastic force of the inner spring 6 and the gravity of the hard magnet 4 and the hard support 5, and then push the rocker switch to cut off the power of the rice cooker, avoiding the problem of burnt rice.

[0035] In one embodiment, the thin ring is made of non-magnetic steel. This allows the ring to be attached to the soft support 3 or the hard support 5 without being affected by the magnetic forces of the hard magnet 4 and the soft magnet 2. The weight of the ring can be adjusted based on actual needs and will not be further elaborated here.

[0036] In one embodiment, the opening of the small cup 7 has an outwardly protruding edge around it, so that the aluminum cover 1 can easily wrap around the opening of the small cup 7 .

[0037] In one embodiment, the aluminum cover 1 is wrapped around the outwardly protruding edge of the opening of the small cup 7 and is threadedly connected to the outwardly protruding edge of the opening of the small cup 7. The soft magnet 2 is clamped onto the soft support 3, and the hard magnet 4 is clamped onto the soft support 3. In this way, the aluminum cover 1, soft magnet 2, and hard magnet 4 can be easily disassembled and replaced.

[0038] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned 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.

[0039] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. A magnetic steel temperature limiter, comprising an aluminum cover, a soft magnet, a soft support, a hard magnet, a hard support, an inner spring, a small cup, and a pull rod, wherein the soft magnet, the soft support, the hard magnet, the hard support, and the inner spring are all located inside the small cup, one end of the pull rod is fixedly connected to the hard support, and the other end of the pull rod is movably disposed through the bottom of the small cup, the inner spring is disposed between the hard support and the aluminum cover, and the soft magnet and the hard magnet are both located inside the inner spring, characterized in that: The hard magnet is detachably mounted on the surface of the hard support close to the opening of the small cup, the soft support is detachably mounted on the inner side of the aluminum cover, the soft magnet is detachably mounted on the soft support, and the aluminum cover is detachably wrapped around the opening of the small cup; The magnetic steel temperature limiter further comprises a plurality of thin circular rings, a plurality of first limit blocks are provided on the surface of the soft support close to the hard support, the plurality of first limit blocks are evenly distributed circumferentially with the center of the soft support as the center, and the plurality of thin circular rings are all clamped on the plurality of first limit blocks; A plurality of second limiting blocks are provided on the outer peripheral edge of the hard support, and the plurality of second limiting blocks are evenly distributed circumferentially with the center of the hard support as the center; The plurality of thin circular rings can be clamped on the plurality of second limiting blocks; the plurality of thin circular rings are made of non-magnetic steel; the inner diameter of the plurality of thin circular rings is equal to the outer diameter of the circle formed by the plurality of second limiting blocks.

2. A magnetic steel temperature limiter according to claim 1, characterized in that: The periphery of the opening of the small cup has an outwardly protruding rim.

3. A magnetic steel temperature limiter as claimed in claim 2, characterized in that: The aluminum cover is wrapped around the outwardly protruding edge of the opening of the small cup and is threadedly connected to the outwardly protruding edge of the opening of the small cup.

4. A magnetic steel temperature limiter as claimed in claim 3, characterized in that: The soft magnetic card is connected to the soft support, and the hard magnetic card is connected to the soft support.

5. A magnetic steel temperature limiter as claimed in claim 4, characterized in that: The magnetic steel temperature limiter also includes an outer spring and a large cup. The outer spring is sleeved on the outer side wall of the small cup and one end of the outer spring is clamped on the outward protruding edge of the opening of the small cup, and the other end of the outer spring is connected to the bottom surface of the inside of the large cup.

6. The magnetic steel temperature limiter according to claim 5, characterized in that: The outer spring and the small cup are both located in the large cup.

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