Overload protection switch for household appliances

Abstract

The invention relates to the technical field of protection switches, in particular to an overload protection switch for household appliances. Comprising a shell, the shell is rotationally connected with a shifting piece, a torsional spring is fixedly connected between the shell and the shifting piece, and the shell is provided with a first connector and a second connector; the wiring board is installed on the shell, and an arc extinguishing fence and a bimetallic plate are arranged in the shell; the plurality of first elastic elements are arranged at intervals, are fixedly connected in the shell, and are used for shaking the arc extinguishing fence; the limiting mechanism is arranged in the shell; and the short-circuit protection mechanism is arranged in the shell. The vibration of the arc fence is relatively prolonged through the first elastic element, so that the propagation path of the arc is continuously changed, the stability of the arc is destroyed, the duration time of the arc is shortened, ablation of the shell and parts in the shell is reduced, and the safety in the using process is improved.

Description

Technical Field

[0001] The invention relates to the technical field of protection switches, and in particular to an overload protection switch for household appliances. Background Art

[0002] An overload protection switch is an electrical device used to prevent a circuit from being damaged due to excessive current. They protect electrical equipment and lines by detecting the current level in the circuit and disconnecting the circuit when it exceeds a preset threshold. Overload protection switches are widely used in home, industrial and commercial environments to ensure the safe and reliable operation of the power system. When the overload protection switch is working, the voltage difference between the contacts will break through the air and form an arc. The generation of the arc will be accompanied by high temperature, which will lead to dangerous situations such as material ablation, insulation damage, and fire. Existing overload protection switches are usually equipped with arc extinguishing fences for arc extinguishing, but a single arc extinguishing fence can only separate the arc into multiple sections and cannot effectively destroy the structure of the arc, that is, the arc lasts for a long time, which can easily burn the switch and pose a safety hazard. Summary of the invention

[0003] In order to overcome the shortcomings of the existing overload protection switch in the arc extinguishing process, such as long arc duration, easy burning of the switch and potential safety hazards, the present invention provides an overload protection switch for household appliances.

[0004] The technical solution is as follows: An overload protection switch for household appliances, comprising: a shell, the shell is rotatably connected to a toggle piece, a torsion spring is fixedly connected between the shell and the toggle piece, and the shell is provided with a first joint and a second joint; a terminal block, installed on the shell, an arc-extinguishing fence and a bimetallic plate are provided in the shell; a first elastic element, which is a plurality of first elastic elements arranged at intervals and fixedly connected to the shell, and the first elastic element is used to shake the arc-extinguishing fence; a limiting mechanism, arranged in the shell, for changing the power-on state of the switch; a short-circuit protection mechanism, arranged in the shell, for protecting the circuit.

[0005] More preferably, the limiting mechanism includes: a first limiting member and a second limiting member, both of which are rotatably connected in the shell, the first limiting member is used to contact the terminal block, the second limiting member is connected to the bimetallic plate by a soft metal wire, the bimetallic plate is used to squeeze the second limiting member, the second limiting member is provided with a notch, a second elastic element is fixedly connected between the first limiting member and the second limiting member, a third elastic element is fixedly connected between the first limiting member and the shell, the first limiting member is provided with a limiting groove, a connecting rod is provided between the toggle member and the first limiting member, and the connecting rod is located in the limiting groove and the notch on the second limiting member.

[0006] More preferably, the short-circuit protection mechanism includes: a sliding rod, slidably connected in the shell, the sliding rod is used to squeeze the second limit member, a coil is arranged between the first connector and the terminal block, and a fourth elastic element is fixedly connected between the sliding rod and the shell; a magnetic rod, fixedly connected to the shell; a metal strip, fixedly connected to the shell, and the coil and the magnetic rod are electrically connected to the metal strip.

[0007] More preferably, the magnetic conductive rod is provided with a plurality of protrusions arranged at intervals, and the plurality of protrusions on the magnetic conductive rod are of different sizes and directions, so as to generate a plurality of magnetic fields of different strengths and directions.

[0008] More preferably, it also includes: a soft strip shell, which is arranged on the outer shell; a sliding bar, which is slidably connected to the outer shell, and the sliding bar is fixedly connected to the soft strip shell, and the sliding bar is used to impact the arc fence; a soft cover, which is arranged on the outer shell, and the soft cover is connected to the soft strip shell, and the soft cover is filled with a gas medium, and the first limiting member is used to squeeze the soft cover.

[0009] More preferably, it also includes: an L-shaped rod, slidably connected to the outer shell, a fifth elastic element fixedly connected between the L-shaped rod and the outer shell, a plurality of first limit blocks fixedly connected to the L-shaped rod and arranged at intervals, and a plurality of second limit blocks fixedly connected to the toggle member and arranged at circumferential intervals, the first limit blocks and adjacent second limit blocks squeeze each other; a limit assembly, arranged in the outer shell, for limiting the L-shaped rod; a trigger assembly, arranged in the outer shell, for causing the L-shaped rod to deform.

[0010] More preferably, the first limiting block and the second limiting block are both in the shape of a "right-angled triangular prism" to enable the two to move in "one direction".

[0011] More preferably, the limit assembly includes: a limit frame slidably connected to the outer shell; an intermediate rod arranged between the limit frame and the bimetal plate, and the L-shaped rod is provided with a plurality of limit grooves arranged at intervals, and the limit grooves are used to limit the limit frame.

[0012] More preferably, the elastic force generated by the single accumulation of force of the fifth elastic element is several times the sum of the elastic forces of the torsion spring and the second elastic element when they are working, so as to reset the toggle member multiple times.

[0013] More preferably, the trigger assembly includes: an elastic rod fixedly connected to the housing; a limiting column arranged on the elastic rod, the L-shaped rod is provided with a guide groove, and the limiting column is located in the guide groove; an extrusion block fixedly connected to the second limiting member, and the extrusion block is used to extrude the limiting column.

[0014] Compared with the prior art, the present invention has the following beneficial effects: the present invention relatively prolongs the vibration of the arc fence through the first elastic element, thereby continuously changing the propagation path of the arc, destroying the stability of the arc, shortening the duration of the arc, reducing the ablation of the shell and its internal parts, and improving the safety during use; using the metal strip to transmit the induced magnetic field to the magnetic rod and the protrusions thereon, so as to attract different areas of the same arc to different degrees, thereby changing the length and shape of the arc, further destroying the structure of the arc, improving the arc extinguishing effect and efficiency, and thus improving the safety of the switch during use; through the first limit The fifth elastic element is used to reset the L-shaped rod, so that the toggle member drives the first limit member to rotate clockwise through the connecting rod, so that the switch is powered on again, thereby eliminating the circuit disconnection caused by clockwise overload (especially for users who are not familiar with circuits), affecting the normal use of some important electrical appliances, thereby affecting the users, and even threatening the lives of the users. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention when the power is off;

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of the present invention when it is powered on;

[0018] Figure 4 It is a three-dimensional structure explosion diagram of the housing and parts thereon of the present invention;

[0019] Figure 5 It is a three-dimensional structure explosion diagram of the first limiter and the parts thereon of the present invention;

[0020] Figure 6 It is a schematic diagram of the three-dimensional structure when the wiring board of the present invention is in contact with the first limiting member;

[0021] Figure 7 It is a three-dimensional structure explosion diagram of the arc extinguishing fence and the parts thereon of the present invention;

[0022] Figure 8 It is a schematic diagram of the three-dimensional structure of the elastic rod of the present invention when it slides along the guide groove;

[0023] Fig. 9 It is a three-dimensional structural exploded view of the L-shaped rod and the parts thereon of the present invention.

[0024] Figure numerals: 1-housing, 2-actuating member, 201-torsion spring, 3-first joint, 4-second joint, 5-terminal board, 6-arc extinguishing fence, 7-bimetallic plate, 8-first elastic element, 901-first limiting member, 902-second limiting member, 903-second elastic element, 904-third elastic element, 905-limiting groove, 906-connecting rod, 1001-sliding rod, 1002-coil, 1003-fourth elastic element , 1004-magnetic rod, 1005-metal strip, 1101-soft strip shell, 1102-sliding strip, 1103-soft cover, 1201-L-shaped rod, 1202-fifth elastic element, 1203-first limit block, 1204-second limit block, 1301-limit frame, 1302-middle rod, 1303-limit groove, 1401-elastic rod, 1402-limit column, 1403-guide groove, 1404-extrusion block. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] like Figure 1-Figure 4 As shown, an embodiment of the present invention is proposed, which proposes an overload protection switch for household appliances to solve the problem that the arc lasts for a long time during the arc extinguishing process of the existing overload protection switch, which is easy to burn the switch and has a safety hazard. The overload protection switch comprises: a shell 1, the shell 1 is rotatably connected to a toggle member 2, a torsion spring 201 is fixedly connected between the shell 1 and the toggle member 2, and the shell 1 is provided with a first joint 3 and a second joint 4; a terminal block 5 is installed on the shell 1, and an arc extinguishing fence 6 and a bimetallic plate 7 are arranged in the shell 1; a plurality of first elastic elements 8 are arranged at intervals and fixedly connected in the shell 1, and the first elastic element 8 is used to shake the arc extinguishing fence 6; a limiting mechanism is arranged in the shell 1, and is used to change the power-on state of the switch; a short-circuit protection mechanism is arranged in the shell 1, and is used to protect the circuit.

[0027] In the above scheme, the housing 1 limits the toggle member 2, the first connector 3 and the second connector 4 are both used to connect to external circuits, the bimetallic plate 7 is composed of two metals with different thermal expansion coefficients, the two metals include but are not limited to copper plate and steel plate, and the copper plate is located on the upper side of the steel plate, the first elastic element 8 is made of rubber, and multiple first elastic elements 8 are respectively located on different sides of the arc extinguishing fence 6. When using the present invention, the present invention is first connected to an external circuit through the first connector 3 and the second connector 4. When the circuit is overloaded, the current flowing through the bimetallic plate 7 increases, that is, the heat generated by the bimetallic plate 7 increases, and then the bimetallic plate 7 is deformed (its right end bends downward, such as Figure 2 The arc is guided to the arc fence 6, and the housing 1 is vibrated through the limiting mechanism. The vibration is transmitted to the arc fence 6, and the arc fence 6 starts to shake. When the arc fence 6 contacts the adjacent first elastic element 8, the first elastic element 8 relatively prolongs the vibration of the arc fence 6, thereby continuously changing the propagation path of the arc, destroying the stability of the arc, shortening the duration of the arc, reducing the arc erosion of the housing 1 and its internal parts, and improving the safety during use. At the same time, the vibrating arc fence 6 also causes the carbides and metal particles produced by the arc erosion to fall off, so as to maintain normal arc extinguishing.

[0028] like Figure 2-Figure 5 and Figure 8 As shown, the limiting mechanism includes: a first limiting member 901 and a second limiting member 902, both of which are rotatably connected in the housing 1, the first limiting member 901 is used to contact the terminal block 5, the second limiting member 902 is connected to the bimetallic plate 7 by a soft metal wire, the bimetallic plate 7 is used to squeeze the second limiting member 902, the second limiting member 902 is provided with a notch, a second elastic element 903 is fixedly connected between the first limiting member 901 and the second limiting member 902, a third elastic element 904 is fixedly connected between the first limiting member 901 and the housing 1, the first limiting member 901 is provided with a limiting groove 905, a connecting rod 906 is provided between the toggle member 2 and the first limiting member 901, and the connecting rod 906 is located in the limiting groove 905 and the notch on the second limiting member 902.

[0029] In the above scheme, the second elastic element 903 is a coil spring, which is used to reset the second limit member 902, and the third elastic element 904 is a torsion spring, which is used to reset the first limit member 901, and the elastic coefficient of the third elastic element 904 is greater than the elastic coefficient of the second elastic element 903. There is an intersecting area between the notch on the second limit member 902 and the projection of the limit groove 905 in the front view direction. The limit groove 905 is an L-shaped groove, which consists of a vertical long groove and a horizontal short groove. The connection between the connecting rod 906 and the toggle member 2 is located at the eccentric position of the toggle member 2. When using the present invention, the user twists the toggle member 2 upward, the toggle member 2 and the housing 1 rotate relative to each other, the torsion spring 201 is deformed, and the toggle member 2 presses down the first limit member 901 (the second limit member 901) through the connecting rod 906. The first limiting member 901 (the second limiting member 902) starts to rotate clockwise, and the third elastic element 904 is deformed and accumulates force until the first limiting member 901 contacts the terminal block 5. At this time, it is a passage (power-on state). At the same time, the connecting rod 906 limits the first limiting member 901 through the short groove on the limiting groove 905. When the circuit is overloaded, the bimetallic plate 7 bends and squeezes the second limiting member 902. The second limiting member 902 starts to rotate counterclockwise relative to the first limiting member 901. The notch of the second limiting member 902 starts to squeeze the connecting rod 906. The connecting rod 906 gradually loses its limit on the first limiting member 901. The first limiting member 901 rotates counterclockwise (resets) under the action of the torque of the third elastic element 904. At this time, it is a power-off state.

[0030] like Figure 1-Figure 4 As shown, the short-circuit protection mechanism includes: a sliding rod 1001, which is slidably connected in the shell 1, and the sliding rod 1001 is used to squeeze the second limit member 902. A coil 1002 is arranged between the first joint 3 and the terminal block 5, and a fourth elastic element 1003 is fixedly connected between the sliding rod 1001 and the shell 1; a magnetic rod 1004, which is fixedly connected to the shell 1, and the magnetic rod 1004 is provided with a plurality of protrusions arranged at intervals, and the sizes and orientations of the plurality of protrusions on the magnetic rod 1004 are different, and are used to generate a plurality of magnetic fields with different strengths and directions; a metal strip 1005, which is fixedly connected to the shell 1, and the coil 1002 and the magnetic rod 1004 are electrically connected to the metal strip 1005.

[0031] In the above scheme, the fourth elastic element 1003 is a spring, which is used to reset the sliding rod 1001. When a short circuit occurs in the circuit, the current in the coil 1002 increases, and the electromagnetic intensity generated by it increases, and attracts the sliding rod 1001. The sliding rod 1001 starts to slide downward and compress the fourth elastic element 1003. At the same time, the sliding rod 1001 squeezes the second limit member 902 downward to make the limit mechanism work, thereby achieving short circuit protection. During the process, an induced magnetic field is generated in the metal strip 1005, and the metal strip 1005 transfers the induced magnetic field to the magnetic rod 1004 and the protrusion thereon, so that different areas of the same arc are attracted to different degrees, thereby changing the length and shape of the arc, further destroying the structure of the arc, improving the arc extinguishing effect and efficiency, and thereby improving the safety of the switch during use.

[0032] like Figure 4 , Figure 6 and Figure 7 As shown, it also includes: a soft strip shell 1101, which is arranged on the outer shell 1; a sliding bar 1102, which is slidably connected to the outer shell 1, and the sliding bar 1102 is fixedly connected to the soft strip shell 1101, and the sliding bar 1102 is used to impact the arc fence 6; a soft cover 1103, which is arranged on the outer shell 1, and the soft cover 1103 is connected to the soft strip shell 1101, and the soft cover 1103 is filled with a gas medium, and the first limiter 901 is used to squeeze the soft cover 1103.

[0033] In the above scheme, the gas medium in the soft cover 1103 is an inert gas, which includes but is not limited to nitrogen. During the counterclockwise rotation of the first limit member 901, when the first limit member 901 contacts the soft cover 1103, the first limit member 901 squeezes the soft cover 1103, and the soft cover 1103 is compressed and transfers the inert gas inside it to the soft strip shell 1101, so that the soft strip shell 1101 gradually expands and extends, thereby driving the sliding bar 1102 to slide upward along the outer shell 1 and impacting the arc fence 6 (the extension amount of the soft strip shell 1101 is limited, and after it is fully extended, the arc fence 6 is not clamped), further increasing the vibration degree of the arc fence 6, and further improving the arc extinguishing effect and efficiency.

[0034] like Figure 2 , Figure 4 , Figure 7 and Figure 8As shown, it also includes: an L-shaped rod 1201, which is slidably connected to the shell 1, a fifth elastic element 1202 is fixedly connected between the L-shaped rod 1201 and the shell 1, a plurality of first limit blocks 1203 arranged at intervals are fixedly connected to the L-shaped rod 1201, and a plurality of second limit blocks 1204 arranged at intervals in the circumferential direction are fixedly connected to the toggle member 2, the first limit blocks 1203 and the adjacent second limit blocks 1204 are mutually squeezed, and the first limit blocks 1203 and the second limit blocks 1204 are both in the shape of a "right-angled triangular prism" for enabling the two to move in "one direction"; a limit assembly is arranged in the shell 1 for limiting the L-shaped rod 1201; a trigger assembly is arranged in the shell 1 for deforming the L-shaped rod 1201, and the elastic force generated by the single accumulation of the fifth elastic element 1202 is several times the sum of the elastic forces of the torsion spring 201 and the second elastic element 903 when working, and is used to reset the toggle member 2 multiple times.

[0035] In the above scheme, the L-shaped rod 1201 can be bent and deformed, and the fifth elastic element 1202 is a tension spring, which is used to reset the L-shaped rod 1201. The inclined surface of the first limit block 1203 faces upward, and the inclined surface of the second limit block 1204 faces downward. When the toggle member 2 is twisted upward, the user pushes the L-shaped rod 1201 upward, and the L-shaped rod 1201 slides upward along the shell 1. The fifth elastic element 1202 is stretched, and the L-shaped rod 1201 drives the first limit block 1203 to move upward together. The first limit block 1203 passes through the adjacent second limit block 1204 until the power storage work is completed. When the switch is overloaded (short-circuit protected), the bimetallic plate 7 bends and limits the L-shaped rod 1201 through the limit assembly. The second limit member 902 bends the L-shaped rod 1201 through the trigger assembly, so that the toggle member 2 can rotate relative to the shell 1. After protection, the temperature of the bimetallic plate 7 gradually decreases and resets to restore its shape, and then the limit assembly loses the limit on the L-shaped rod 1201. The L-shaped rod 1201 begins to move downward under the pulling force of the fifth elastic element 1202 (reset, the distance of a single movement of the L-shaped rod 1201 is 1 / n of its total length after it is charged, and the toggle member 2 can be reset multiple times). The L-shaped rod 1201 squeezes the adjacent second limit block 1204 through the first limit block 1203 to drive the toggle member 2 to rotate counterclockwise, and then the toggle member 2 drives the first limit member 901 to rotate clockwise through the connecting rod 906, so that the switch is re-energized, thereby eliminating the circuit disconnection caused by instantaneous overload, resulting in some important electrical appliances (such as electrical appliances related to user safety) cannot be used normally (especially for users who are not familiar with circuits), thereby affecting users and even threatening the lives of users.

[0036] like Figure 8 and Fig. 9As shown, the limit assembly includes: a limit frame 1301, which is slidably connected to the shell 1; an intermediate rod 1302, which is arranged between the limit frame 1301 and the bimetal plate 7, and the L-shaped rod 1201 is provided with a plurality of limit grooves 1303 arranged at intervals, and the limit grooves 1303 are used to limit the limit frame 1301. When the limit frame 1301 enters the limit groove 1303, the bimetal plate 7 completes the extrusion of the second limit member 902; the trigger assembly includes: an elastic rod 1401, which is fixedly connected to the shell 1; a limit column 1402, which is arranged on the elastic rod 1401, and the L-shaped rod 1201 is provided with a guide groove 1403, and the limit column 1402 is located in the guide groove 1403; an extrusion block 1404, which is fixedly connected to the second limit member 902, and the extrusion block 1404 is used to extrude the limit column 1402.

[0037] In the above scheme, in the initial state, the limiting groove 1303 does not limit the limiting frame 1301, the elastic rod 1401 is made of elastic metal material (including but not limited to steel), the guide groove 1403 is a vertical groove, and the extrusion block 1404 is a hard rubber block. When the bimetal plate 7 is bent due to overload, the bimetal plate 7 squeezes the middle rod 1302, and the middle rod 1302 squeezes the limiting frame 1301. The limiting frame 1301 starts to move to the right and gradually inserts into the adjacent limiting groove 1303. The limiting groove 1303 limits the limiting frame 1301. When the bimetal plate 7 is reset, the limiting frame 1301 moves to the left and loses the limit on the L-shaped rod 1201, so that the toggle Component 2 can deflect upward again (to enable power), and when the second limit component 902 rotates counterclockwise (power-off process), the second limit component 902 drives the extrusion block 1404 to rotate counterclockwise together, and the extrusion block 1404 squeezes the limit column 1402 to the left (the extrusion block 1404 is deformed, and the elastic rod 1401 is bent), and the limit column 1402 drives the L-shaped rod 1201 to bend, so that the first limit block 1203 moves away from the adjacent second limit block 1204 in the horizontal direction, so that the toggle component 2 can rotate normally until the extrusion block 1404 passes the limit column 1402, and the L-shaped rod 1201, the elastic rod 1401 and the limit column 1402 are reset.

[0038] After completing the overload protection (during the process of powering on again), the second limit piece 902 rotates clockwise. During this process, the second limit piece 902 squeezes the limit column 1402 through the squeezing block 1404, and the L-shaped rod 1201 is squeezed, and its upper part begins to bend to the right, so that the first limit block 1203 and the adjacent second limit block 1204 are closely matched, ensuring the transmission relationship between the two, and then ensuring the normal operation of the work site.

[0039] Those skilled in the art should understand that the above embodiments do not limit the present invention in any form, and any technical solutions obtained by equivalent replacement or equivalent transformation shall fall within the protection scope of the present invention.

Claims

1. An overload protection switch for household appliances, characterized in that: Included are: A housing (1), the housing (1) being rotatably connected to a toggle member (2), a torsion spring (201) being fixedly connected between the housing (1) and the toggle member (2), and the housing (1) being provided with a first joint (3) and a second joint (4); A terminal block (5) is mounted on the housing (1), wherein an arc extinguishing fence (6) and a bimetallic plate (7) are arranged inside the housing (1); A plurality of first elastic elements (8) are arranged at intervals and are all fixedly connected to the housing (1); the first elastic elements (8) are used to shake the arc extinguishing fence (6); A limiting mechanism, arranged in the housing (1) and used to change the power-on state of the switch; A short circuit protection mechanism is arranged in the housing (1) and is used to protect the circuit.

2. An overload protection switch for household appliances according to claim 1, characterized in that: The limiting mechanism comprises: The first limiting member (901) and the second limiting member (902) are both rotatably connected in the housing (1); the first limiting member (901) is used for contacting the wiring board (5); the second limiting member (902) is connected to the bimetallic plate (7) via a soft metal wire; the bimetallic plate (7) is used for pressing the second limiting member (902); the second limiting member (902) is provided with a notch; a second elastic element (903) is fixedly connected between the first limiting member (901) and the second limiting member (902); a third elastic element (904) is fixedly connected between the first limiting member (901) and the housing (1); the first limiting member (901) is provided with a limiting groove (905); a connecting rod (906) is provided between the toggle member (2) and the first limiting member (901); the connecting rod (906) is located in the limiting groove (905) and the notch on the second limiting member (902).

3. An overload protection switch for household appliances according to claim 2, characterized in that: The short circuit protection mechanism comprises: a sliding rod (1001) slidably connected in the housing (1), the sliding rod (1001) being used to press the second limiting member (902), a coil (1002) being provided between the first connector (3) and the wiring board (5), and a fourth elastic element (1003) being fixedly connected between the sliding rod (1001) and the housing (1); A magnetic conductive rod (1004) fixedly connected to the housing (1); The metal strip (1005) is fixedly connected to the housing (1), and the coil (1002) and the magnetic rod (1004) are both electrically connected to the metal strip (1005).

4. An overload protection switch for household appliances according to claim 3, characterized in that: The magnetic conductive rod (1004) is provided with a plurality of protrusions arranged at intervals, and the plurality of protrusions on the magnetic conductive rod (1004) are of different sizes and directions, and are used to generate magnetic fields of different strengths and directions.

5. An overload protection switch for household appliances according to claim 2, characterized in that: Also included are: A soft strip shell (1101), arranged on the outer shell (1); A sliding bar (1102) is slidably connected to the outer shell (1), the sliding bar (1102) is fixedly connected to the soft strip shell (1101), and the sliding bar (1102) is used to impact the arc fence (6); A soft cover (1103) is arranged on the outer shell (1); the soft cover (1103) is connected to the soft strip shell (1101); the soft cover (1103) is filled with a gas medium; and the first limiting member (901) is used to squeeze the soft cover (1103).

6. An overload protection switch for household appliances according to claim 2, characterized in that: Also included are: An L-shaped rod (1201) is slidably connected to the housing (1); a fifth elastic element (1202) is fixedly connected between the L-shaped rod (1201) and the housing (1); the L-shaped rod (1201) is fixedly connected to a plurality of first limit blocks (1203) arranged at intervals; the toggle member (2) is fixedly connected to a plurality of second limit blocks (1204) arranged at intervals in the circumferential direction; the first limit blocks (1203) and adjacent second limit blocks (1204) are mutually compressed; A limiting component is arranged in the housing (1) and is used to limit the position of the L-shaped rod (1201); and a triggering component is arranged in the housing (1) and is used to cause the L-shaped rod (1201) to deform.

7. An overload protection switch for household appliances according to claim 6, characterized in that: The first limit block (1203) and the second limit block (1204) are both in the shape of a "right-angled triangular prism" and are used to enable the two to move in "one direction".

8. An overload protection switch for household appliances according to claim 6, characterized in that: The limit assembly includes: A limiting frame (1301) slidably connected to the housing (1); The middle rod (1302) is arranged between the limiting frame (1301) and the bimetallic plate (7), and the L-shaped rod (1201) is provided with a plurality of limiting grooves (1303) arranged at intervals, and the limiting grooves (1303) are used to limit the limiting frame (1301).

9. An overload protection switch for household appliances according to claim 8, characterized in that: The elastic force generated by the single accumulation of force by the fifth elastic element (1202) is several times the sum of the elastic forces of the torsion spring (201) and the second elastic element (903) when they are in operation, and is used to reset the toggle member (2) multiple times.

10. An overload protection switch for household appliances according to claim 8, characterized in that: The trigger component includes: An elastic rod (1401) fixedly connected to the housing (1); A limiting column (1402) is arranged on the elastic rod (1401), the L-shaped rod (1201) is provided with a guide groove (1403), and the limiting column (1402) is located in the guide groove (1403); An extrusion block (1404) is fixedly connected to the second limiting member (902), and the extrusion block (1404) is used to extrude the limiting column (1402).

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