Electric switch with over-current protection function for household electrical appliance

Abstract

The invention relates to the technical field of electric appliance switches, in particular to an electric switch with an over-current protection function for a household appliance, which comprises a shell provided with a first conductive part, a first fixing frame and a second conductive part; the rotating frame is rotationally arranged on the first fixing frame, the rotating frame is used for making contact with the first conductive part and communicating with a circuit, a wire is connected between the rotating frame and the second conductive part, and the middle of the wire is spirally wound; the switch is rotationally arranged on the first fixing frame; the swing rod is rotationally arranged on the first fixing frame, and an elastic connecting rod is rotationally arranged between the swing rod and the switch; and the swing frame is rotationally arranged on the swing rod. According to the invention, the swing frame is triggered to swing in a delayed manner, so that when the current in the circuit fluctuates, the swing frame does not swing at the first time, thereby keeping the normal work of the household appliance and improving the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical appliance switches, and in particular to an electric switch for household appliances with an overcurrent protection function. Background Art

[0002] In the household electrical environment, some household appliances are equipped with magnetic disconnection circuit breaker protection devices, which are designed to protect these appliances individually and prevent the abnormal increase of local current from triggering the main circuit breaker of the entire household circuit to cut off the power supply, thereby preventing all appliances connected to the main circuit breaker in the home from losing power supply at the same time. However, the magnetic disconnection circuit breaker protection structure in some existing household appliances is designed to be too sensitive and may be triggered under current fluctuations in normal use. The reasons for the current fluctuation in the circuit are as follows:

[0003] 1. Load changes: When electrical equipment in the circuit is started or shut down, it will cause a sudden increase or decrease in current. For example, a motor requires a large starting current when it starts, and the current will drop significantly after stable operation.

[0004] 2. Grid power supply quality: The public grid provided by the power company may have problems such as voltage fluctuations and frequency deviations, which will affect the current stability of the user-side circuit. The above reasons are only some examples.

[0005] The above-mentioned brief fluctuations in current will trigger the magnetic circuit breaker protection structure, thereby affecting the normal operation of related household appliances and causing a bad experience for users. Summary of the invention

[0006] In order to overcome the above-mentioned problems, the present invention provides an electric switch for household appliances with an overcurrent protection function.

[0007] The technical solution of the present invention is: an electric switch for household appliances with an overcurrent protection function, comprising: a shell, on which a first conductive member, a first fixed frame and a second conductive member are installed; a rotating frame, rotatably arranged on the first fixed frame, and a torsion spring is installed between the rotating frame and the first fixed frame, the rotating frame is used to contact the first conductive member and connect the circuit, a wire is connected between the rotating frame and the second conductive member, and the middle part of the wire is spirally coiled; a switch, rotatably arranged on the first fixed frame; a swing rod, rotatably arranged on the first fixed frame, and an elastic connecting rod is rotatably arranged between the swing rod and the switch; a swing frame, rotatably arranged on the swing rod, and a torsion spring is installed between the swing rod, and the swing frame is provided with a hook for limiting the rotating frame; a protection mechanism is arranged in the shell, and the protection mechanism is used to slowly squeeze the swing frame to swing.

[0008] Preferably, the rotating frame is provided with a groove, and the hook of the swing frame is located in the groove, so as to enhance the connection stability between the two.

[0009] Preferably, the rotating frame is fixed with a cylindrical rod, the cylindrical rod is used to squeeze the elastic connecting rod, a torsion spring is installed between the switch and the first fixed frame, and the elastic coefficient of the torsion spring connected to the switch is smaller than the elastic coefficient of the torsion spring connected to the rotating frame.

[0010] Preferably, the protection mechanism includes: a second fixed frame, fixedly connected to the shell, and the wire is spirally wound on the second fixed frame; a sliding column, slidably arranged in the second fixed frame, and a spring is installed between the sliding column and the second fixed frame, and the sliding column is located in the spiral part of the wire, the sliding column is used to squeeze the swing frame, and a sliding cavity is arranged in the sliding column; an armature, slidably arranged in the sliding cavity of the sliding column, the armature is made of silicon steel, and the armature is located in the spiral part of the wire; a limit assembly, arranged in the sliding cavity of the sliding column, and the limit assembly is used to limit the movement of the armature.

[0011] Preferably, the limiting assembly comprises: a limiting block fixedly connected to the sliding cavity of the sliding column; a leaf spring fixedly connected to the armature, and the leaf spring is provided with a limiting protrusion contacting the limiting block.

[0012] Preferably, it also includes: an n-shaped frame fixedly connected in the shell, the n-shaped frame is used to prevent the rotating frame from rotating; and an arc extinguishing grid installed on the n-shaped frame.

[0013] Preferably, symmetrically distributed sliding blocks are slidably arranged in the sliding cavity of the sliding column, tension springs are arranged between the symmetrically distributed sliding blocks, the sliding blocks are provided with inclined surfaces, the armature is used to squeeze the inclined surfaces of the sliding blocks, and the sliding blocks are used to contact the second fixing frame.

[0014] Preferably, the grooves are evenly distributed on opposite sides of the two sliding blocks, and the opposite sides of the two sliding blocks are made of rubber material.

[0015] Preferably, it also includes: a limit bar fixedly connected to the sliding column, the sliding block is slidably provided with a sliding member, the sliding member contacts the limit bar to limit the movement of the corresponding sliding block, the sliding member is slidably provided with a sliding shell, and springs are installed between the sliding shell and the adjacent sliding member and between the sliding shell and the adjacent sliding block.

[0016] Preferably, it also includes: an L-shaped rod, which is fixed to the armature and passes through the sliding column and is slidably connected to it; a fixed frame, which is fixed in the shell, and the fixed frame is slidably provided with two centrally symmetrical racks, and the fixed frame is rotatably provided with a gear meshing with both of the racks, the L-shaped rod is fixed to the adjacent rack, and the other rack is slidably provided with a sliding rod, a tension spring is installed between the sliding rod and the adjacent rack, and the sliding rod is used to squeeze the elastic connecting rod.

[0017] The present invention has the following advantages: the present invention delays the triggering of the swing frame to swing, so that when the current in the circuit fluctuates, the swing frame will not swing immediately, thereby maintaining the normal operation of the household appliance and improving the user experience; when the current in the circuit is high for a long time, the swing frame swings to complete the power-off operation of the household appliance, performs overcurrent protection, and avoids damage to the household appliance; the time length for triggering the swing frame is set by setting the sum of the distance between the sliding column and the swing frame and the sliding distance of the armature, so as to avoid the current fluctuation in the circuit triggering the swing frame to swing, thereby ensuring the normal operation of the household appliance; the arc extinguishing grid is used to weaken the arc generated during power failure; the sliding column moves to impact the sliding block, thereby increasing the friction between the sliding block and the second fixed frame, so that the device controls the sliding column to be at different moving speeds according to different changing frequencies of the current, delays the separation time between the rotating frame and the first conductive member, avoids unnecessary restart and data loss, and improves the user experience; in the power-off state, the armature is subjected to self-repositioning, and at this time, the armature automatically turns the switch into a closed state through the connected parts, so that it is convenient for the operator to subsequently install the household appliance in the household circuit, thereby improving the safety performance of the device during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the three-dimensional structure of the first conductive member and the second conductive member of the present invention;

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the switch and the swing rod of the present invention;

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the elastic connecting rod and the swing frame of the present invention;

[0022] Figure 5 An exploded view of the rotating frame and the swing rod of the present invention;

[0023] Figure 6 It is a cross-sectional view of the second fixing frame and the sliding column of the present invention;

[0024] Figure 7It is a schematic diagram of the three-dimensional structure of the sliding block and the limiting strip of the present invention;

[0025] Figure 8 It is a cross-sectional view of the sliding column and the sliding shell of the present invention;

[0026] Fig. 9 It is a schematic diagram of the three-dimensional structure of the L-shaped rod and the fixing frame of the present invention;

[0027] Fig.10 It is a schematic diagram of the three-dimensional structure of the present invention in a closed state.

[0028] Markings in the figure are: 1, shell, 11, first conductive part, 12, first fixed frame, 13, rotating frame, 131, groove, 14, second conductive part, 16, wire, 17, switch, 18, swing rod, 181, elastic connecting rod, 19, swing frame, 191, cylindrical rod, 2, N-shaped frame, 21, arc extinguishing grid, 3, second fixed frame, 31, sliding column, 32, armature, 41, limit block, 42, leaf spring, 5, sliding block, 6, limit strip, 61, sliding part, 62, sliding shell, 7, L-shaped rod, 71, fixed frame, 72, rack, 73, sliding rod. DETAILED DESCRIPTION

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0030] Embodiment 1: An electric switch for household appliances with overcurrent protection function, such as Figure 1-Figure 4 and Fig.10As shown, it includes: a housing 1, on which a first conductive member 11, a first fixed frame 12 and a second conductive member 14 are installed; a rotating frame 13, which is rotatably arranged on the first fixed frame 12, and a torsion spring is installed between the rotating frame 13 and the first fixed frame 12, and the rotating frame 13 is used to contact the first conductive member 11 and connect the circuit, and a wire 16 is connected between the rotating frame 13 and the second conductive member 14, and the middle part of the wire 16 is spirally wound; a switch 17, which is rotatably arranged on the first fixed frame 12; a swing rod 18, which is rotatably arranged on the first fixed frame 12, and an elastic connecting rod 181 is rotatably arranged between the swing rod 18 and the switch 17; a swing frame 19, which is rotatably arranged It is placed on the swing rod 18, and a torsion spring is installed between the swing rod 18. The swing frame 19 is provided with a hook for limiting the rotating frame 13. The rotating frame 13 is provided with a groove 131. The hook of the swing frame 19 is located in the groove 131 to enhance the connection stability between the two; a protection mechanism is arranged in the shell 1, and the protection mechanism is used to slowly squeeze the swing frame 19 to swing; the rotating frame 13 is fixedly connected with a cylindrical rod 191, and the cylindrical rod 191 is used to squeeze the elastic connecting rod 181. A torsion spring is installed between the switch 17 and the first fixed frame 12, and the elastic coefficient of the torsion spring connected to the switch 17 is smaller than the elastic coefficient of the torsion spring connected to the rotating frame 13.

[0031] In the above scheme: the housing 1 is installed on the household appliance, which is used to control the on and off of the circuit in the household appliance. The housing 1 is composed of a main body and a pressure cover. The front side of the housing 1 can be provided with a plastic cover that is easy to disassemble to prevent the operator from accidentally touching the switch 17 and reduce the amount of dust and water vapor entering the housing 1. The first conductive member 11, the lower part of the rotating frame 13, the second conductive member 14 and the wire 16 are made of conductive materials, and the remaining undescribed parts are all made of insulating materials. The lower part of the wire 16 can be bent and deformed to adapt to the swing of the rotating frame 13. Figure 2 This is a schematic diagram of the device when it is turned on. Fig.10 This is a schematic diagram of the device when it is closed. The cylindrical rod 191 is located on the lower side of the elastic connecting rod 181. In the initial state, the hook of the swing frame 19 is located in the groove 131. At this time, the swing rod 18 and the rotating frame 13 remain relatively still. In actual use, if a thermal release system needs to be installed, it is only necessary to install a bimetallic strip between the second conductive member 14 and the wire 16. The torsion spring connected to the sliding column 31 and the torsion spring connected to the switch 17 are always in a torsion state.

[0032] like Figure 2 , Figure 6 and Figure 7As shown, the protection mechanism includes: a second fixed frame 3, fixedly connected to the shell 1, and its wire 16 is spirally wound on the second fixed frame 3; a sliding column 31, slidably arranged in the second fixed frame 3, and a spring is installed between the sliding column 3 and the second fixed frame 3, and the sliding column 31 is located in the spiral part of the wire 16, the sliding column 31 is used to squeeze the swing frame 19, and a sliding cavity is arranged in the sliding column 31; an armature 32, slidably arranged in the sliding cavity of the sliding column 31, the armature 32 is made of silicon steel, and the armature 32 is located in the spiral part of the wire 16; a limiting component, arranged in the sliding cavity of the sliding column 31, the limiting component is used to limit the movement of the armature 32; the limiting component includes: a limiting block 41, fixedly connected to the sliding cavity of the sliding column 31; a leaf spring 42, fixedly connected to the armature 32, and the leaf spring 42 is provided with a limiting protrusion contacting the limiting block 41.

[0033] In the above scheme: the armature 32 is located at the lower part of the spiral part on the wire 16, the spring connected to the sliding column 31 is always in a compressed state, the limit block 41 is provided with a V-shaped surface, the upper limit protrusion of the leaf spring 42 is V-shaped, the V-shaped surface of the limit block 41 contacts the V-shaped surface of the leaf spring 42, and the gravity of the armature 32 is greater than the limiting force between the limit block 41 and the upper limit protrusion of the leaf spring 42. When the rotating frame 13 contacts the first conductive member 11, there is a gap between the sliding column 31 and the swing frame 19, and the gap is used to prevent the sliding column 31 from accidentally touching the swing frame 19. The elastic force of the spring connected to the sliding column 31 is greater than the limiting force between the limit block 41 and the leaf spring 42.

[0034] The specific working principle is that after the device is assembled with the corresponding household appliance, when using the household appliance, the operator first installs the plug of the household appliance to the socket in the household circuit, and then the operator pulls the switch 17 upward, and the torsion spring connected to the switch 17 continues to twist. The rotation of the switch 17 drives the swing rod 18, the swing frame 19 and the rotating frame 13 to swing through the elastic connecting rod 181, and the swing of the rotating frame 13 continues to twist the connected torsion spring, wherein the swing of the rotating frame 13 is in contact with the first conductive member 11 (in the attached state). Figure 2 The circuit in the household appliance is connected to the household circuit, so that the household appliance can work normally.

[0035] During operation, the current in the circuit passes through the first conductive member 11, the lower part of the rotating frame 13, the second conductive member 14 and the wire 16 to supply energy to the electrical components. When the current in the circuit fluctuates, the current becomes smaller and does not affect the normal operation of the household appliance, and it does not damage the electrical components in the household appliance. When the current becomes larger, the large current drives the household appliance to work for a long time, which is easy to cause overload damage. In this process, the large current passes through the wire 16, so that the magnetic field strength of the spirally wound part of the wire 16 is correspondingly enhanced. The enhanced magnetic field increases the attraction to the armature 32. At this time, due to the limiting effect between the limiting block 41 and the leaf spring 42 and the elastic force of the spring connected to the sliding column 31, the armature 32 first remains relatively still.

[0036] When the attraction of the magnetic field generated by the wire 16 on the armature 32 is greater than the limiting force between the limit block 41 and the leaf spring 42, the leaf spring 42 is deformed and separated from the limit block 41. At this time, the armature 32 drives the leaf spring 42 to move upward, so that the armature 32 fits the upper side of the sliding cavity on the sliding column 31. The attraction generated by the subsequent magnetic field acts on the sliding column 31 through the armature 32, so that the armature 32 and the sliding column 31 move upward, and the sliding column 31 compresses the connected spring. As the large current continues to pass, the sliding column 31 gradually moves upward and squeezes the swing frame 19, and the swing frame 19 swings away from the limit on the rotating frame 13, and then the rotating frame 13 is connected to the torsion spring. Under the action of the torque, the rotating frame 13 swings in the reverse direction to reset, and the rotating frame 13 releases the contact with the first conductive member 11, completing the circuit disconnection operation to protect the household appliance. During the resetting process of the rotating frame 13, it drives the cylindrical rod 191 to reset. At this time, the cylindrical rod 191 squeezes the elastic connecting rod 181, causing the elastic connecting rod 181 to swing in the reverse direction to reset. At the same time, the switch 17 is pulled to swing in the reverse direction to reset under the action of the torque of the connected torsion spring. At the same time, the current stops flowing, and the armature 32 is acted upon by gravity, causing the leaf spring 42 to move downward through the limit block 41, that is, the device returns to its initial state. After the problem is repaired later, the above operation is repeated to start the device to work.

[0037] During the above-mentioned circuit disconnection process, the time required for the armature 32 to move is used to prevent the household appliance from stopping working due to a brief increase (or brief fluctuation) in the current in the circuit, thereby improving the user experience. At the same time, it can effectively prevent data loss or file damage for household appliances that are recording data, help maintain the normal operation of the equipment, and provide a smoother user experience.

[0038] Embodiment 2: Based on embodiment 1, Figure 2 As shown, it also includes: an n-shaped frame 2, which is fixed in the housing 1 and is used to prevent the rotating frame 13 from rotating; and an arc extinguishing grid 21, which is installed on the n-shaped frame 2.

[0039] In the above scheme: Figure 2For example, a conductive sheet is provided on the right side of the n-shaped frame 2. When the device is in a closed state (see Fig.10 In the state shown in FIG. 1 , the rotating frame 13 contacts the conductive sheet on the n-shaped frame 2, the left portion of the first conductive member 11 is located in the n-shaped frame 2, and the arc extinguishing grid 21 is located between the first conductive member 11 and the conductive sheet of the n-shaped frame 2. During the above disconnection operation, as the rotating frame 13 rotates to the adjacent Fig.10 In the state shown in , an arc is easily generated between the rotating frame 13 and the first conductive member 11. At this time, the generated arc moves along the first conductive member 11 and the conductive sheet on the n-shaped frame 2, so that the arc moves to the arc extinguishing grid 21. The arc extinguishing grid 21 splits the arc into several small segments until the arc disappears, thereby avoiding the arc in the circuit from damaging the device when the circuit is disconnected, that is, extending the service life of the device.

[0040] Embodiment 3: Based on embodiment 2, Figure 6-Figure 8 As shown, symmetrically distributed sliding blocks 5 are slidably arranged in the sliding cavity of the sliding column 31, tension springs are arranged between the symmetrically distributed sliding blocks 5, the sliding blocks 5 are provided with inclined surfaces, the armature 32 is used to squeeze the inclined surfaces of the sliding blocks 5, and the sliding blocks 5 are used to contact the second fixed frame 3; evenly distributed grooves 131 are arranged on the opposite sides of the two sliding blocks 5, and the opposite sides of the two sliding blocks 5 are made of rubber material.

[0041] In the above scheme: there are two sliding blocks 5, and the inclined surfaces of the two sliding blocks 5 gradually move away from each other from top to bottom. When a short-term large current passes through the household appliance in the circuit, the current in the circuit becomes larger (this short-term large current will not seriously damage the household appliance), so that the armature 32 moves upward under the attraction of the magnetic field generated by the wire 16. The armature 32 moves up and first impacts the inclined surface of the sliding block 5. The armature 32 squeezes the two sliding blocks 5 away from each other, so that the sliding block 5 squeezes the second fixed frame 3, increasing the friction between the sliding block 5 and the second fixed frame 3, that is, increasing the movement resistance of the sliding column 31. At this time, the sliding column 31 will not quickly squeeze the swing frame 19, that is, the device will not enter the disconnected state, and the current can flow normally to supply the household appliance to work. However, when the current in the circuit flows for a long time in this higher working state, the sliding column 31 will still slowly move to squeeze the swing frame 19 to disconnect the circuit. If the current is subsequently restored, the sliding column 31 and the armature 32 will synchronously move in the opposite direction under the elastic force of the spring connected to the sliding column 31.

[0042] Embodiment 4: Based on embodiment 3, Figure 7 and Figure 8As shown, it also includes: a limit bar 6, which is fixed to the sliding column 31, a sliding member 61 is slidably provided on the sliding block 5, the sliding member 61 contacts the limit bar 6 to limit the movement of the corresponding sliding block 5, and a sliding shell 62 is slidably provided on the sliding member 61, and springs are installed between the sliding shell 62 and the adjacent sliding member 61 and between the sliding shell 62 and the adjacent sliding block 5.

[0043] In the above scheme: the lower part of the limit bar 6 is provided with limit teeth distributed symmetrically in the center. In the initial state, the lower surface of the sliding shell 62 is lower than the lower surface of the sliding block 5. The lower surface of the sliding shell 62 is provided with balls for reducing the friction between it and the armature 32. When a short high current passes through the household appliance, the movement of the armature 32 first squeezes the sliding shell 62, and the sliding shell 62 compresses the connected spring. At the same time, the sliding shell 62 squeezes the sliding member 61 through the corresponding spring, so that the sliding member 61 fits with the limit bar 6. Subsequently, the armature 32 impacts the sliding block 5, so that the sliding block 5 moves accordingly. During the movement of the sliding block 5, the sliding block 5 drives the sliding member 61 to move together. Due to the limitation of the sliding member 61 by the limit bar 6, the sliding block 5 will maintain the position after the movement, that is, the sliding block 5 maintains the squeezing force between the second fixing frame 3, so that the sliding column 31 keeps sliding slowly, ensuring the time required for the circuit to be disconnected, avoiding a short-term high current causing the circuit to be in a disconnected state and affecting its connection to the normal operation of the household appliance.

[0044] Embodiment 5: Based on Embodiment 4, Figure 2 and Fig. 9 As shown, it also includes: an L-shaped rod 7, which is fixed to the armature 32 and passes through the sliding column 31 and is slidably connected to it; a fixed frame 71, which is fixed to the shell 1, and the fixed frame 71 is slidably provided with two centrally symmetrical racks 72, and the fixed frame 71 is rotatably provided with a gear meshing with both racks 72, the L-shaped rod 7 is fixed to the adjacent rack 72, and the other rack 72 is slidably provided with a sliding rod 73, a tension spring is installed between the sliding rod 73 and the adjacent rack 72, and the sliding rod 73 is used to squeeze the elastic connecting rod 181.

[0045] In the above scheme: the sliding rod 73 is located below the elastic connecting rod 181. After the household appliance is used, when the operator disconnects the circuit by unplugging the plug, the armature 32 moves downward and resets under the action of gravity. The armature 32 moves the sliding rod 73 and the connected spring upward through the L-shaped rod 7, the two racks 72 and the gear. The sliding rod 73 squeezes the elastic connecting rod 181 and swings upward, so that the switch 17 rotates and resets. That is, when the device is in the power-off state, the switch 17 will automatically be in the closed state, preventing the operator from plugging the plug into the socket when the switch 17 is in the on state, that is, preventing the operator from being electrically shocked during the process of plugging the plug into the socket.

[0046] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. An electric switch for household appliances with overcurrent protection function, characterized in that: Included are: A housing (1) is provided with a first conductive member (11), a first fixed frame (12) and a second conductive member (14); a rotating frame (13) is rotatably arranged on the first fixed frame (12), and a torsion spring is installed between the rotating frame (13) and the first fixed frame (12); the rotating frame (13) is used to contact the first conductive member (11) and connect the circuit; a wire (16) is connected between the rotating frame (13) and the second conductive member (14); The middle portion of the wire (16) is spirally coiled; A switch (17) rotatably mounted on the first fixing frame (12); A swing rod (18) is rotatably mounted on the first fixing frame (12), and an elastic connecting rod (181) is rotatably mounted between the swing rod (18) and the switch (17); A swing frame (19) is rotatably arranged on the swing rod (18), and a torsion spring is installed between the swing frame (19) and the swing rod (18), and the swing frame (19) is provided with a hook for limiting the rotating frame (13); a protection mechanism is arranged in the housing (1), and the protection mechanism is used to slowly squeeze the swing frame (19) to swing.

2. The electric switch for household appliances with overcurrent protection function according to claim 1, characterized in that: The rotating frame (13) is provided with a groove (131), and the hook of the swing frame (19) is located in the groove (131), so as to enhance the connection stability between the two.

3. The electric switch for household appliances with overcurrent protection function according to claim 2, characterized in that: The rotating frame (13) is fixedly connected with a cylindrical rod (191), and the cylindrical rod (191) is used to squeeze the elastic connecting rod (181). A torsion spring is installed between the switch (17) and the first fixed frame (12), and the elastic coefficient of the torsion spring connected to the switch (17) is smaller than the elastic coefficient of the torsion spring connected to the rotating frame (13).

4. The electric switch for household appliances with overcurrent protection function according to claim 3, characterized in that: The protection mechanism includes: A second fixing frame (3) is fixedly connected to the housing (1), and the conducting wire (16) is spirally wound around the second fixing frame (3); a sliding column (31) which is slidably arranged in the second fixing frame (3), and a spring is installed between the sliding column (3) and the second fixing frame (3), and the sliding column (31) is located in the spiral part of the wire (16), and the sliding column (31) is used to squeeze the swing frame (19), and a sliding cavity is arranged in the sliding column (31); An armature (32) is slidably disposed in a sliding cavity of the sliding column (31), the armature (32) is made of silicon steel, and the armature (32) is located in a spiral portion on the wire (16); A limit assembly is arranged in the sliding cavity of the sliding column (31), and the limit assembly is used to limit the movement of the armature (32).

5. The electric switch for household appliances with overcurrent protection function according to claim 4, characterized in that: The limit assembly includes: A limit block (41) is fixedly connected to the sliding cavity of the sliding column (31); A leaf spring (42) is fixedly connected to the armature (32), and the leaf spring (42) is provided with a limiting protrusion that contacts the limiting block (41).

6. The electric switch for household appliances with overcurrent protection function according to claim 5, characterized in that: Also included are: An n-shaped frame (2) is fixedly connected to the housing (1), and the n-shaped frame (2) is used to prevent the rotating frame (13) from rotating; The arc extinguishing grid (21) is installed on the n-shaped frame (2).

7. The electric switch for household appliances with overcurrent protection function according to claim 6, characterized in that: A sliding block (5) is symmetrically distributed and slidingly arranged in the sliding cavity of the sliding column (31), a tension spring is arranged between the symmetrically distributed sliding blocks (5), the sliding block (5) is provided with an inclined surface, the armature (32) is used to press the inclined surface of the sliding block (5), and the sliding block (5) is used to contact the second fixing frame (3).

8. The electric switch for household appliances with overcurrent protection function according to claim 7, characterized in that: The opposite sides of the two sliding blocks (5) are provided with evenly distributed grooves (131), and the opposite sides of the two sliding blocks (5) are made of rubber material.

9. The electric switch for household appliances with overcurrent protection function according to claim 8, characterized in that: Also included are: A limit bar (6) is fixedly connected to the sliding column (31); the sliding block (5) is slidably provided with a sliding member (61); the sliding member (61) contacts the limit bar (6) to limit the movement of the corresponding sliding block (5); the sliding member (61) is slidably provided with a sliding shell (62); springs are installed between the sliding shell (62) and the adjacent sliding member (61) and between the sliding shell (62) and the adjacent sliding block (5).

10. An electric switch for household appliances with overcurrent protection function according to claim 9, characterized in that: Also included are: An L-shaped rod (7) is fixed to the armature (32) and passes through the sliding column (31) and is slidably connected thereto; A fixed frame (71) is fixedly connected to the shell (1); the fixed frame (71) is slidably provided with two centrally symmetrical racks (72); the fixed frame (71) is rotatably provided with a gear meshing with the two racks (72); the L-shaped rod (7) is fixedly connected to the adjacent rack (72); the other rack (72) is slidably provided with a sliding rod (73); a tension spring is installed between the sliding rod (73) and the adjacent rack (72); the sliding rod (73) is used to squeeze the elastic connecting rod (181).

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