Socket with overload protection

Abstract

The utility model relates to a socket with overload protection. The socket comprises a housing, and an overload protection assembly, a plug bush assembly and a wiring terminal assembly which are arranged in the housing. The plug bush assembly comprises an L-pole plug bush; the overload protection assembly comprises an elastic piece and a button. The overload protection assembly is further provided with an elastic pressing component. The elastic pressing part applies an acting force to the elastic sheet, and when the movable contact is connected into the power supply line of the L-pole plug bush in a contact manner to conduct the power supply line of the L-pole plug bush, the acting force of the elastic pressing part increases the contact pressure between the movable contact and the power supply line of the L-pole plug bush; when the movable contact is separated from the power supply line of the L-pole plug bush, the acting force of the elastic pressing part drives the elastic sheet to drive the movable contact to be far away from the power supply line of the L-pole plug bush, so that the safety can be improved, the driving elastic sheet is ensured not to automatically reset, and the reliability is improved.

Description

Technical Field

[0001] The utility model relates to the field of low-voltage electrical appliances, and particularly relates to a socket with overload protection. Background Art

[0002] At present, in the fixed sockets with overload protection on the market, the overload protection device is usually made into a module and exists in the socket. As an encapsulated individual, this overload protection device is connected to the external circuit through special pins. The general connection methods are welding, riveting or spot welding, etc. As an encapsulated individual, the internal space of the overload protection device is closed and not easy to dissipate heat. At the same time, the fixed socket is also embedded in the wall and is not easy to dissipate heat itself. The combination of the two places relatively high requirements for the temperature rise of the product and is prone to safety hazards. In addition, the pins are generally straight or bent at a certain angle, with a single structure, which is not conducive to the structural design of the conductive parts cooperating with them inside. In addition, the outer shell of the overload protection device is generally made of PA66, and the material cost is relatively high, which is not conducive to cost control. Therefore, in the prior art, the overload protection device is not used as an encapsulated individual, but is directly arranged in the socket. However, in this way, the reliability of the breakpoint is poor, there is a problem of insufficient contact pressure, which is easy to cause heating problems, and there is also a problem of automatic reset of the breakpoint. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide a safe and reliable socket with overload protection.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A socket with overload protection includes a housing, and an overload protection component, a socket sleeve component and a terminal block component arranged in the housing; the socket sleeve component includes an L-pole socket sleeve; the terminal block component includes an L-pole terminal block; the L-pole socket sleeve is electrically connected to the L-pole terminal block to form a power supply line of the L-pole socket sleeve.

[0006] The overload protection component includes a shrapnel and a button; the shrapnel is connected in series to the power supply line of the L-pole socket; the shrapnel is an elastic structure that can be deformed by heating; one end of the shrapnel is fixedly arranged and connected to the power supply line of the L-pole socket, and the movable end of the shrapnel can be switched between a first position and a second position. When the movable end of the shrapnel is in the first position, it is connected to the power supply line of the L-pole socket in a contacting manner to conduct the power supply line of the L-pole socket; when the shrapnel is deformed by heat during overload, it drives the movable end to move from the first position to the second position to separate from the power supply line of the L-pole socket, disconnecting the power supply line of the L-pole socket; the button is movably arranged and one end extends out of the housing when the movable end of the shrapnel is in the second position, and the other end of the button corresponds to the movable end of the shrapnel, and is used to drive the movable end of the shrapnel to move from the second position to the first position;

[0007] The overload protection component is also provided with an elastic pressing component; the elastic pressing component is connected to the movable end of the shrapnel to apply a force to the shrapnel. When the movable end of the shrapnel is in the first position, the force of the elastic pressing component increases the contact pressure between the movable end of the shrapnel and the power supply line of the L-pole socket; when the movable end of the shrapnel is in the second position, the force of the elastic pressing component drives the movable end of the shrapnel away from the power supply line of the L-pole socket.

[0008] Preferably, the overload protection component is also provided with an adjusting part; one end of the elastic pressing component is installed on the adjusting part, and the other end is connected to the movable end of the shrapnel, and the adjusting part is used to adjust the position of the elastic pressing component relative to the shrapnel.

[0009] Preferably, the movable end of the shrapnel is provided with a moving contact, and the shrapnel is connected to the power supply line of the L-pole socket in a contacting manner through the moving contact; the L-pole socket is provided with a static contact, and the L-pole socket is in contact connection with the moving contact through the static contact.

[0010] Preferably, one end of the elastic pressing component is rotatably arranged, and the other end is connected to the shrapnel, and the elastic pressing component changes the direction of the force on the shrapnel by rotation.

[0011] Preferably, a return spring is also provided, and the return spring acts on the button to make one end of the button extend out of the housing.

[0012] Preferably, the adjusting part is a screw, and the screw rod of the screw is connected to the housing through a threaded fit.

[0013] Preferably, one end of the elastic pressing component is provided with a V-shaped groove of the elastic pressing component, and the screw rod of the screw is also provided with a circumferential screw rod positioning groove along the radial direction; the elastic pressing component is stuck in the screw rod positioning groove through the V-shaped groove of the elastic pressing component, and the other end of the elastic pressing component is clamped with the shrapnel.

[0014] Preferably, the elastic pressing component is of a leaf spring structure. One end is provided with a V-shaped groove of the elastic pressing component, the other end is provided with a tongue piece, and a bending part is arranged in the middle to form elasticity. A tongue piece through hole is arranged at the movable end of the leaf spring, and the tongue piece of the elastic pressing component is clamped in the tongue piece through hole.

[0015] Preferably, the elastic pressing component forms step surfaces on opposite sides of the root of the tongue piece and is placed on the surface of the leaf spring through the step surfaces to apply pressure thereto.

[0016] Preferably, an L pole piece is further provided. The L pole piece is connected to an L pole wiring terminal, and one end of the leaf spring is fixedly installed on the L pole piece.

[0017] Preferably, the movable end of the leaf spring is provided with a movable contact mounting hole for mounting a movable contact and a tongue piece through hole for connecting with the elastic pressing component. The other end of the leaf spring is bent to form a leaf spring deformation part and then extends to one side and is provided with a step mounting hole for engaging and connecting with the step of the L pole piece.

[0018] Preferably, the L pole piece includes an L pole connecting piece, a leaf spring mounting plate connected to one end of the L pole connecting piece, and an L pole piece insertion plate connected to the other end of the L pole connecting piece. The L pole piece insertion plate is connected to the L pole wiring terminal. A horizontal support surface is formed by bending at the connection between the leaf spring mounting plate and the L pole connecting piece. Steps are provided on the side surface of the leaf spring mounting plate. The step mounting hole of the leaf spring is engaged and connected with the step of the L pole piece; the leaf spring deformation part of the leaf spring is supported on the horizontal support surface of the leaf spring mounting plate.

[0019] Preferably, a spring limit mounting groove for mounting the return spring is further radially provided on the end rod body of the other end of the button.

[0020] Preferably, the wiring terminal assembly further includes a ground pole wiring terminal and an N pole wiring terminal; the ground pole wiring terminal is detachably and fixedly connected to the ground pole insertion piece of the ground pole socket; the N pole wiring terminal is detachably and fixedly connected to the N pole socket.

[0021] Preferably, the housing includes a base and a panel assembly, and the base and the panel assembly are detachably assembled through the clamping structures provided on each of them.

[0022] The socket with overload protection of the utility model is provided with a shrapnel of an elastic structure that can be deformed by heat generation, which is connected in series in the power supply circuit of the L-pole socket. When the current flowing through the shrapnel is too large during overload, the shrapnel is deformed by heat, driving the moving contact to separate from the power supply circuit of the L-pole socket, disconnecting the power supply circuit of the L-pole socket, and realizing overload protection. And a spring pressing component is provided, and the spring pressing component applies a force to the shrapnel. When the moving contact is connected to the power supply circuit of the L-pole socket in a contacting manner to conduct the power supply circuit of the L-pole socket, the force of the spring pressing component increases the contact pressure between the moving contact and the power supply circuit. When the moving contact separates from the power supply circuit of the L-pole socket, the force of the spring pressing component drives the shrapnel to drive the moving contact away from the power supply circuit of the L-pole socket, increasing the distance between the moving contact and the power supply circuit of the L-pole socket, improving safety, and ensuring that the driving shrapnel will not automatically reset, improving reliability; there is a handle above the shrapnel. After the circuit fault is eliminated, pressing the handle can make the shrapnel return to its original position, making the static and dynamic silver contacts close and the circuit conduct.

[0023] In addition, the socket with overload protection is also provided with an adjusting member for adjusting the position of the spring pressing component relative to the shrapnel and the force applied to the shrapnel, with strong adaptability.

[0024] In addition, the spring pressing component, the screw and the shrapnel are all installed by plugging, without welding, and the assembly is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the overall exploded view of the socket with overload protection of the utility model;

[0026] Figure 2 is the sectional view of the socket with overload protection of the utility model when the circuit is in a conducting state;

[0027] Figure 3 is the sectional view of the socket with overload protection of the utility model when the circuit is in an open state;

[0028] Figure 4 is the assembly view of the socket with overload protection of the utility model after removing the panel assembly;

[0029] Figure 5 is the structural schematic diagram of the base of the socket with overload protection of the utility model;

[0030] Figure 6 is the structural schematic diagram of the L-pole piece of the socket with overload protection of the utility model;

[0031] Figure 7 is the structural schematic diagram of the shrapnel of the socket with overload protection of the utility model;

[0032] Figure 8 is the structural schematic diagram of the spring pressing component of the socket with overload protection of the utility model;

[0033] Figure 9 Schematic structural diagram of the screw of the socket with overload protection of the present utility model;

[0034] Figure 10 Schematic structural diagram of the L - pole socket sleeve of the socket with overload protection of the present utility model;

[0035] Figure 11 Assembly drawing among the elastic piece, L - pole piece and moving contact of the socket with overload protection of the present utility model.

[0036] The reference numerals in the attached drawings include:

[0037] 1 - Base 1, 11 - Base engaging plate, 111 - Sac - shaped through - hole, 112 - Base holding structure; 12 - Blocking groove; 13 - Button assembly installation position, 131 - L - pole piece installation position, 132 - Elastic piece installation position, 133 - Screw installation post, 134 - Button limiting groove; 14 - Socket sleeve assembly installation position, 141 - L - pole socket sleeve installation position, 142 - Earth - pole socket sleeve installation position, 143 - N - pole socket sleeve installation position 143; 15 - Wiring terminal assembly installation position;

[0038] 2 - Button assembly, 21 - L - pole piece, 211 - L - pole connecting piece, 212 - Elastic piece mounting plate, 213 - L - pole piece insertion plate, 214 Step 214; 22 - Elastic piece, 221 - Moving contact mounting hole, 222 Tongue - piece through - hole 222, 223 Step mounting hole, 224 Elastic piece deformation part; 23 - Elastic pressing member, 231 - Tongue - piece, 232 Elastic pressing member V - shaped groove, 233 Step surface; 24 - Screw, 241 - Nut, 242 - Screw rod, 2421 Screw rod positioning groove; 25 - Moving contact; 26 - Static contact; 27 - Button; 28 - Return spring;

[0039] 3 - Socket sleeve assembly, 31 - L - pole socket sleeve, 311 - L - pole socket sleeve connecting piece, 312 - Static contact through - hole; 32 - Earth - pole socket sleeve, 321 - Earth - pole insertion piece; 33 - N - pole socket sleeve, 331 - N - pole insertion piece;

[0040] 4 - Wiring terminal assembly, 41 - L - pole wiring terminal, 42 - Earth - pole wiring terminal, 43 - N - pole wiring terminal; 5 - Panel assembly, 51 - Panel holding structure. Specific embodiments

[0041] The following embodiments given in conjunction with the attached drawings further illustrate the specific embodiments of the present utility model. The protection scope of the present utility model is not limited to the description of the following embodiments.

[0042] As Figures 1-4 shown, the socket with overload protection in this embodiment includes a housing and an overload protection component 2, a socket sleeve component 3, and a wiring terminal component 4 arranged inside the housing.

[0043] The housing is provided with jacks corresponding to the socket assembly 3 for inserting plugs; the jacks include two-pin jacks and / or three-pin jacks. The housing of this embodiment includes a base 1 and a panel assembly 5 covering the base 1. The overload protection assembly 2, the socket assembly 3, and the terminal block assembly 4 are installed between the base 1 and the panel assembly 5. Of course, as other embodiments, the housing can also adopt other combination methods. The socket assembly 3 of this embodiment includes an L-pole socket 31, a ground-pole socket 32, and an N-pole socket 33; the terminal block assembly 4 includes an L-pole terminal 41, a ground-pole terminal 42, and an N-pole terminal 43; the L-pole socket 31, the ground-pole socket 32, and the N-pole socket 33 are respectively connected to the corresponding terminals of the terminal block assembly 4. Of course, as other embodiments, the socket assembly 3 can also be provided with only the L-pole socket 31 and the N-pole socket 33, without the ground-pole socket 32.

[0044] The overload protection assembly 2 includes a shrapnel 22, a button 27, and a spring pressing member 23. The L-pole socket 31 is electrically connected to the L-pole terminal 41 to form a power supply line for the L-pole socket 31, and the N-pole socket 33 is electrically connected to the N-pole terminal 43 to form a power supply line for the N-pole terminal 43; the shrapnel 22 is connected in series in the power supply line of the L-pole socket 31. The shrapnel 22 is an elastic structure that can generate heat and deform. One end of the shrapnel 22 is fixedly arranged and connected to the power supply line of the L-pole socket 31. The movable end of the shrapnel 22 can be switched between a first position and a second position. When the movable end of the shrapnel 22 is in the first position, it is connected to the power supply line of the L-pole socket 31 in a contacting manner to conduct the power supply line of the L-pole socket 31. When the current flowing through the shrapnel 22 is too large during overload, the shrapnel 22 is heated and deformed, driving the movable end to move from the first position to the second position to separate from the power supply line of the L-pole socket 31, disconnecting the power supply line of the L-pole socket 31, and realizing overload protection.

[0045] The elastic piece 22 is a bimetallic strip. In this embodiment, the elastic piece 22 is fixedly arranged on the L pole piece 21. The elastic piece 22 is electrically connected to the L pole wiring terminal 41 through the L pole piece 21. A moving contact 25 is arranged at the movable end of the elastic piece 22, and a static contact 26 is arranged on the L pole socket 31. The moving contact 25 on the elastic piece 22 is in contact connection with the static contact 26 to conduct the power supply line of the L pole socket 31. When the moving contact 25 on the elastic piece 22 is separated from the static contact 26, the power supply line of the L pole socket 31 is disconnected. It should be noted that as other embodiments, the elastic piece 22 can also be fixedly connected to the L pole socket 31, and the static contact 26 is arranged on the L pole piece 21; or, the static contact 26 can be not arranged, and the moving contact 25 on the elastic piece 22 is directly in contact connection with the L pole socket 31, or the moving contact 25 is directly in contact connection with the L pole piece 21, or directly with the L pole wiring terminal 41; or the moving contact 25 can be not arranged, and the movable end of the elastic piece 22 is directly in contact connection with the L pole socket 31 or the L pole wiring terminal 41; or the L pole piece 21 can be not arranged, and the elastic piece 22 is directly fixedly connected to the L pole wiring terminal 41, which is all acceptable.

[0046] The button 27 is movably arranged. A return spring 28 acts on the button 27 to make one end of the button 27 extend out of the housing. The other end of the button 27 corresponds to the movable end of the elastic piece 22. The button 27 is used to drive the movable end of the elastic piece 22 to move from the second position to the first position, that is, to drive the elastic piece 22 to drive the moving contact 25 to move in the direction of contacting the power supply line of the L pole socket 31. When the movable end of the elastic piece 22 is in the second position, pressing the end of the button 27 that extends out of the housing, the button 27 can drive the movable end of the elastic piece 22 to reset to the first position, so that the moving contact 25 contacts the static contact 26 again and re-conducts the power supply line of the L pole socket 31. When the movable end of the elastic piece 22 is in the second position, the other end of the button 27 can be in contact with the movable end of the elastic piece 22 or not. As long as pressing the button 27 can drive the movable end of the elastic piece 22 to move from the second position to the first position.

[0047] Particularly, the overload protection component 2 of this embodiment further has an elastic pressing component 23. The elastic pressing component 23 is connected to the elastic piece 22 to apply a force to the elastic piece 22. When the moving contact 25 accesses the power supply line of the L pole socket 31 in a contact manner to conduct the power supply line of the L pole socket 31, the force of the elastic pressing component 23 increases the contact pressure between the moving contact 25 and the power supply line. When the moving contact 25 is separated from the power supply line of the L pole socket 31, the force of the elastic pressing component 23 drives the elastic piece 22 to drive the moving contact 25 away from the power supply line of the L pole socket 31, increasing the distance between the moving contact 25 and the power supply line of the L pole socket 31, improving safety, and ensuring that the driving elastic piece 22b will not automatically reset, improving reliability.

[0048] Reference Figure 2, in this embodiment, the shrapnel 22 is electrically connected to the L-pole terminal 41 through the L-pole piece 21. The moving contact 25 on the shrapnel 22 is in contact connection with the static contact 26 on the L-pole socket 31 to conduct the power supply line of the L-pole socket 31. At this time, the movable part of the shrapnel 22 is in the first position, and the acting force of the elastic pressing member 23 drives the moving contact 25 to press tightly on the static contact 26 to increase the contact pressure. Refer to Figure 3 , when overloaded, the shrapnel 22 is heated and deformed to overcome the acting force of the elastic pressing member 23, driving the moving contact 25 to separate from the power supply line of the L-pole socket 31, and storing energy in the elastic pressing member 23. After the shrapnel 22 drives the elastic pressing member 23 to cross the dead point equilibrium position, the elastic pressing member 23 converts to energy release, driving the shrapnel 22 to drive the moving contact 25 away from the static contact 26, preventing the shrapnel 22 from immediately driving the moving contact 25 to contact the static contact 26 after cooling and restoring deformation. At this time, the movable part of the shrapnel 22 is in the second position. After the shrapnel 22 cools and restores deformation, the socket can be removed from Figure 3 the state to Figure 2 the state by pressing the button 27. The button 27 drives the shrapnel 22 to overcome the acting force of the elastic pressing member 23, driving the moving contact 25 to move towards the static contact 26, and storing energy in the elastic pressing member 23. After the shrapnel 22 drives the elastic pressing member 23 to cross the dead point equilibrium position, the elastic pressing member 23 converts to energy release, driving the shrapnel 22 to drive the moving contact 25 to contact the static contact 26 again and increasing the contact pressure.

[0049] Preferably, the overload protection component 2 is further provided with an adjusting member. One end of the elastic pressing member 23 is installed on the adjusting member, and the other end is connected to the movable end of the shrapnel 22. The adjusting member is used to adjust the position of the elastic pressing member 23 relative to the shrapnel 22. The adjusting member in this embodiment is a screw 24. The screw rod 242 of the screw 24 is in threaded cooperation with the housing. The elastic pressing member 23 is installed on the screw 24. By rotating the screw 24, the position of the elastic pressing member 23 and the acting force on the shrapnel 22 can be adjusted. As Figure 8 shown, the elastic pressing member 23 in this embodiment is of a shrapnel structure, with a bending part formed to have elasticity. One end of the elastic pressing member 23 is rotatably arranged on the adjusting member. The middle part of the elastic pressing member 23 has a bending part formed to have elasticity, and the other end is connected to the shrapnel 22, applying an acting force to the shrapnel 22. The elastic pressing member 23 changes the acting force direction on the shrapnel 22 by rotation. As Figure 2 shown, when the moving contact 25 is in contact with the static contact 26, the connection point between the elastic pressing member 23 and the shrapnel 22 is located below the rotatably arranged end of the elastic pressing member 23, and the elastic pressing member 23 applies a downward acting force to increase the contact pressure between the moving contact 25 and the static contact 26; as Figure 3As shown, when overloaded, the spring sheet 22 is deformed by heat to overcome the force of the spring-pressing component 23 and drive the moving contact 25 to separate from the static contact 26. After the spring-pressing component 23 rotates past the equilibrium position (the horizontal position in the figure in this embodiment), the connection point between the spring-pressing component 23 and the spring sheet 22 is located above the rotating setting end of the spring-pressing component 23. The spring-pressing component 23 applies a force upward to drive the spring sheet 22 to drive the moving contact 25 away from the static contact 26. Figure 8 , 9 In this embodiment, one end of the spring-pressing component 23 is provided with a spring-pressing component V-shaped groove 232, and the screw 24 is provided with a circle of screw positioning grooves 2421. The spring-pressing component 23 is installed in the screw positioning groove 2421 through the spring-pressing component V-shaped groove 232 to be positioned, and the spring-pressing component 23 can be rotated up and down with the end provided with the spring-pressing component V-shaped groove 232 as the rotation axis, and the other end of the spring-pressing component 23 is engaged with the spring sheet 22, which is convenient for assembly. Of course, the spring-pressing component 23 can also be directly installed on the shell, and the spring-pressing component 23 can also be implemented by a compression spring, a torsion spring or other methods. For example, the compression spring is connected to the movable end of the spring sheet 22, and the other end is rotationally connected to the shell or the screw 24. The movable end of the spring sheet 22 drives the compression spring to rotate and compress the compression spring. After the compression spring rotates past the dead point equilibrium position, the compression spring releases energy to push the movable end of the spring sheet 22. It should also be noted that the overload protection component 2 may also not be provided with a reset spring 28 for driving the button 27. Refer to Figure 3 When the movable end of the spring sheet 22 is located at the second position, the spring sheet 22 and / or the spring-pressing component 23 can drive one end of the button 27 to extend out of the housing.

[0050] A preferred embodiment of the present invention is further described below:

[0051] like Figure 5 As shown, the front of the base 1 is a concave structure, and the back is a convex structure. The base 1 is provided with a base clamping plate 11 on the bottom of a groove on the side of a relative groove wall of the concave structure, and a row of blocking grooves 12 are provided on the bottom of another relative groove wall of the concave structure; a sac-shaped through hole 111 is provided through the middle section of the base clamping plate 11, and a base clamping structure 112 is provided on the upper part of both ends. The base 1 is provided with a button assembly installation position 13 at the bottom of the middle groove of the concave structure, and a plug assembly installation position 14 and a terminal assembly installation position 15 are provided on the bottom of the groove next to the button assembly installation position 13. The button assembly installation position 13 is respectively provided with an L-pole piece installation position 131, a spring piece installation position 132, a screw installation column 133, a button limiting groove 134 and a button through hole located directly below the button limiting groove 134; a screw hole is provided on the screw installation column 133. The socket assembly installation position 14 includes an L-pole socket installation position 141 , a ground-pole socket installation position 142 , and an N-pole socket installation position 143 .

[0052] As shown Figures 3-4 in the figure, the overload protection component 2 is installed on the button component installation position 13 on the front of the base 1, and it includes a shrapnel 22, a spring pressing component 23, a screw 24, a moving contact 25, a static contact 26, a button 27, and a reset spring 28. The shrapnel 22 is installed on the L-pole piece 21, and the L-pole piece 21 is connected to the L-pole terminal 41.

[0053] As shown Figure 6 in the figure, the L-pole piece 21 is detachably installed on the L-pole piece installation position 131 of the button component installation position 13 of the base 1. It is an integral structure and includes an L-pole connecting piece 211, a shrapnel mounting plate 212 connected to one end of the L-pole connecting piece 211, and an L-pole piece plug board 213 connected to the other end of the L-pole connecting piece 211. The L-pole piece plug board 213 is used to connect to the L-pole terminal 41. A horizontal support surface is formed by bending at the connection of the shrapnel mounting plate 212 and the L-pole connecting piece 211, and a step 214 is provided on the side surface of the shrapnel mounting plate 212.

[0054] As shown Figure 7 in the figure, the shrapnel 22 is detachably installed on the shrapnel installation position 132 of the button component installation position 13 of the base 1 and is located below the button limiting groove 134. One end of it is provided with a moving contact mounting hole 221 and a tongue passing hole 222, and the other end is bent to form a shrapnel deformation part 224 and extends to one side, and a step mounting hole 223 is provided at the extending end. Among them, the other end of the shrapnel 22 is snap-fitted and connected to the step 214 of the L-pole piece 21 through the step mounting hole 223. The bent part of the other end of the shrapnel 22 is the shrapnel deformation part 224, which is supported on the horizontal support surface of the shrapnel mounting plate 212. The moving contact mounting hole 221 is used to rivet the moving contact 25, and the tongue passing hole 222 is used to pass the tongue 231 at the front end of the spring pressing component 23.

[0055] As shown Figure 8 in the figure, one end of the spring pressing component 23 is provided with a tongue 231 and is snap-fitted into the tongue passing hole 222 of the shrapnel 22 through the tongue 231. The other end of the spring pressing component 23 is provided with a spring pressing component V-shaped groove 232 and is fixed to the top of the screw mounting post 133 of the button component installation position 13 of the base 1 through the spring pressing component V-shaped groove 232 with a screw 24. Among them, on both sides of the root of the tongue 231 at one end of the spring pressing component 23, there are formed step surfaces 233. One end of the spring pressing component 23 is placed on the surface of the shrapnel 22 through the step surfaces 233 and applies a pressure to the shrapnel 22 to make the shrapnel 22 press in the required direction. The elastic force generated by the spring pressing component 23 can increase the contact pressure when the moving contact 25 contacts the static contact 26, and can increase the distance between them when the moving and static contacts are separated.

[0056] As shown Figure 9 As shown, the screw 24 is screwed into the screw hole of the screw mounting post 133 of the button assembly mounting position 13 of the base 1. Among them, the screw 24 is composed of a nut 241 with a cross slot and a screw rod 242 with a thread. A circle of screw rod positioning slots 2421 that cooperate with the V-shaped groove 232 of the elastic component is also radially opened at the end of the screw rod 242. One end of the elastic component 23 is stuck in the screw rod positioning slot 2421 through the V-shaped groove of the elastic component. The thread on the screw rod 242 of the screw 24 is in interference fit connection with the screw hole of the screw mounting post 133 of the button assembly mounting position 13 of the base 1. The nut 241 of the screw 24 can be rotated with a screwdriver, and then the extended length of the screw 24, and further the position of the elastic component 23 relative to the elastic piece 22, to further adjust their mutual acting force and control the force required for the elastic piece 22 to spring open.

[0057] The moving contact 25 is riveted at the moving contact mounting hole 221 of the elastic piece 22.

[0058] The static contact 26 is installed on the L-pole socket 31 of the socket assembly 3.

[0059] One end of the button 27 extends outward from the outside of the panel assembly 5, and the other end sequentially passes through the panel assembly 5, the button limit slot 134 of the base 1 and the button through hole and extends outside the button through hole. Among them, a circular spring limit mounting groove is also radially opened on the end rod body of the other end of the button 27.

[0060] The return spring 28 is sleeved on the spring limit mounting groove at the other end of the button 27 and can be movably embedded in the button through hole.

[0061] As shown Figures 1-4 As shown, the socket assembly 3 is installed at the socket assembly mounting position 14, and it includes an L-pole socket 31, a ground-pole socket 32 and an N-pole socket 33. Among them, the L-pole socket 31 is installed at the L-pole socket mounting position 141 of the socket assembly mounting position 14, and an L-pole socket connecting piece 311 protrudes outward in the middle section. As shown Figure 10 As shown, a static contact through hole 312 is opened on the L-pole socket connecting piece 311. The static contact 26 passes through the static contact through hole 312 of the L-pole socket connecting piece 311 and is riveted tightly after being in close contact with the L-pole socket connecting piece 311. The ground-pole socket 32 is installed at the ground-pole socket mounting position 142 of the socket assembly mounting position 14, and a ground-pole inserting piece 321 protrudes outward on one side of the middle section. The N-pole socket 33 is installed at the N-pole socket mounting position 143 of the socket assembly mounting position 14, and an N-pole inserting piece 331 protrudes outward on one side.

[0062] Among them, when the moving contact 25 and the static contact 26 are in a separated state, pressing the button 27 sleeved on the protruding support rib 123 of the base 1 can press the elastic piece 22 towards the static contact 26, enabling the silver contacts of the moving contact 25 and the static contact 26 to come into contact with each other and conduct electricity. When the current passing through the elastic piece 22 is too large, the elastic piece 22 will be heated and deformed, moving away from the static contact 26. When the elastic force generated by the elastic piece 22 is greater than the pressure generated by the elastic pressing component 23, the elastic piece 22 will bounce the moving contact 25 away. After the elastic pressing component 23 passes the equilibrium position, it will apply pressure in the opposite direction, pushing the elastic piece 22 further away from the static contact 26, thereby achieving the purpose of power-off.

[0063] As Figures 1-4 shown, the wiring terminal assembly 4 is installed at the wiring terminal assembly installation position 15 of the base 1, and it includes an L-pole wiring terminal 41, a ground-pole wiring terminal 42, and an N-pole wiring terminal 43; the L-pole wiring terminal 41 is detachably and fixedly connected to the L-pole plate insert 213 of the L-pole plate 21; the ground-pole wiring terminal 42 is detachably and fixedly connected to the ground-pole insert piece 321 of the ground-pole insert sleeve 32; the N-pole wiring terminal 43 is detachably and fixedly connected to the N-pole insert piece 331 of the N-pole insert sleeve 33.

[0064] As Figure 1 shown, the panel assembly 5 is detachably installed on the front of the base 1 and covers the overload protection assembly 2, the insert sleeve assembly 3, and the wiring terminal assembly 4 installed on the base 1; among them, a set of opposite side edges of the side of the panel assembly 5 that is assembled with the base 1 are convexly provided with panel clamping structures 51 that are engaged with the base clamping structures 112 of the base 1, and the detachable assembly between the panel assembly 5 and the base 1 is realized through the cooperation of the panel clamping structures 51 and the base clamping structures 112.

[0065] Among them, the elastic piece 22 is a bimetallic strip, which will heat up according to the magnitude of the current flowing through the elastic piece 22. After heating, the elastic piece 22 itself will deform and bounce open, causing the circuit to break at the moving contact 25 and the static contact 26; and the elastic pressing component 23 will ensure that the moving contact 25 separated after the elastic piece 22 bounces open remains at the farthest distance; and there is a button 27 above the elastic piece 22. After the circuit fault is eliminated, pressing the button 27 can make the elastic piece 22 return to its original position, enabling the moving contact 25 and the static contact 26 to come into contact and the circuit to conduct electricity.

[0066] In this embodiment, the direct riveting method of the elastic piece 22 and the L-pole plate 21 is adopted, and the cost is relatively low. However, the connection methods such as spot welding and soldering are also within the protection scope of the present utility model.

[0067] In this embodiment, the elastic pressing component 23 is installed by plugging with both the screw 24 and the elastic sheet 22, without welding. Of course, the elastic pressing component 23 and the elastic sheet 22 can also be welded or riveted, which are all within the protection scope of the present utility model.

[0068] In this embodiment, the moving contact 25 and the static contact 26 are connected in a way that they touch each other. If the static contact 26 is removed and the moving contact 25 is directly pressed on the L-pole socket 31, etc., similar effects can also be achieved. Removing the moving contact 25 is also within the protection scope of the present utility model.

[0069] In this embodiment, if the elastic sheet 22 is riveted to the L-pole piece 21, the static contact 26 is located on the L-pole socket 31. If the elastic sheet 22 is riveted to the L-pole socket 31, the static contact 26 is located on the L-pole piece 21, which is also acceptable and within the protection scope of the present utility model.

[0070] The structure of the present utility model is designed simply and reasonably, with convenient installation and disassembly, safe and reliable in use, and suitable for popularization and application.

[0071] It should be noted that in the description of the present utility model, the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when in normal use. It is only for the convenience of description and does not indicate that the device or component referred to must have a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0072] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, which should all be regarded as belonging to the protection scope of the present utility model.

Claims

1. A socket with overload protection, comprising a housing and an overload protection assembly (2), a socket assembly (3) and a terminal assembly (4) arranged in the housing; The socket assembly (3) comprises an L-pole socket (31); the terminal assembly (4) comprises an L-pole terminal (41); the L-pole socket (31) and the L-pole terminal (41) are electrically connected to form a power supply circuit of the L-pole socket (31); The overload protection component (2) comprises a spring sheet (22) and a button (27); the spring sheet (22) is connected in series to the power supply circuit of the L-pole socket (31); the spring sheet (22) is an elastic structure that can be deformed when heated; one end of the spring sheet (22) is fixedly arranged and connected to the power supply circuit of the L-pole socket (31); the movable end of the spring sheet (22) can be switched between a first position and a second position; when the movable end of the spring sheet (22) is in the first position, it is connected to the power supply circuit of the L-pole socket (31) in a contacting manner, thereby conducting the L The power supply circuit of the L-pole socket (31) is connected to the power supply circuit of the L-pole socket (31); the spring sheet (22) is deformed by heat when overloaded, driving the movable end to move from the first position to the second position to separate from the power supply circuit of the L-pole socket (31), thereby disconnecting the power supply circuit of the L-pole socket (31); the button (27) is movably arranged and one end of the button (27) extends out of the housing when the movable end of the spring sheet (22) is located in the second position, and the other end of the button (27) corresponds to the movable end of the spring sheet (22) and is used to drive the movable end of the spring sheet (22) to move from the second position to the first position; characterized in that: The overload protection assembly (2) is further provided with a spring-pressing component (23); the spring-pressing component (23) is connected to the movable end of the spring sheet (22) to apply an action force to the spring sheet (22); when the movable end of the spring sheet (22) is located at a first position, the action force of the spring-pressing component (23) increases the contact pressure between the movable end of the spring sheet (22) and the power supply line of the L-pole socket (31); when the movable end of the spring sheet (22) is located at a second position, the action force of the spring-pressing component (23) drives the movable end of the spring sheet (22) away from the power supply line of the L-pole socket (31).

2. The socket with overload protection as claimed in claim 1, characterized in that: The overload protection assembly (2) is also provided with an adjusting member; one end of the spring-pressing member (23) is mounted on the adjusting member, and the other end is connected to the movable end of the spring sheet (22); the adjusting member is used to adjust the position of the spring-pressing member (23) relative to the spring sheet (22).

3. The socket with overload protection as claimed in claim 1, characterized in that: The movable end of the spring piece (22) is provided with a moving contact (25), and the spring piece (22) is connected to the power supply line of the L-pole socket (31) in a contacting manner through the moving contact (25); The L-pole socket (31) is provided with a static contact (26), and the L-pole socket (31) is in contact with and connected to the moving contact (25) via the static contact (26).

4. The socket with overload protection as claimed in claim 1, characterized in that: One end of the elastic component (23) is rotatably arranged, and the other end is connected to the elastic sheet (22). The elastic component (23) changes the direction of the force acting on the elastic sheet (22) by rotating.

5. The socket with overload protection as claimed in claim 1, characterized in that: A return spring (28) is also provided, and the return spring (28) acts on the button (27) to make one end of the button (27) extend out of the housing.

6. The socket with overload protection as claimed in claim 2, characterized in that: The adjusting member is a screw (24), and the screw rod (242) of the screw (24) is connected to the housing through threaded matching.

7. The socket with overload protection as claimed in claim 6, characterized in that: One end of the spring-pressing component (23) is provided with a spring-pressing component V-shaped groove (232), and the screw rod (242) of the screw (24) is also provided with a circle of screw rod positioning grooves (2421) along the radial direction; the spring-pressing component (23) is clamped in the screw rod positioning groove (2421) through the spring-pressing component V-shaped groove (232), and the other end of the spring-pressing component (23) is clamped with the spring sheet (22).

8. The socket with overload protection according to claim 1 or 7, characterized in that: The spring-pressing component (23) is a spring-type structure, with a spring-pressing component V-shaped groove (232) at one end, a tongue piece (231) at the other end, and a bent portion in the middle to form elasticity. The movable end of the spring piece (22) is provided with a tongue piece through hole (222), and the tongue piece (231) of the spring-pressing component (23) is clamped in the tongue piece through hole (222).

9. The socket with overload protection as claimed in claim 8, characterized in that: The elastic pressure component (23) is located at two opposite sides of the root of the tongue piece (231) and is formed with step surfaces (233) and is supported on the surface of the elastic piece (22) through the step surfaces (233) to apply pressure thereto.

10. The socket with overload protection according to claim 1 or 3, characterized in that: An L-pole sheet (21) is also provided, the L-pole sheet (21) is connected to an L-pole connection terminal (41), and one end of a spring sheet (22) is fixedly mounted on the L-pole sheet (21).

11. The socket with overload protection as claimed in claim 10, characterized in that: The movable end of the spring sheet (22) is provided with a moving contact mounting hole (221) for mounting a moving contact (25) and a tongue through hole (222) for connecting with the spring-pressing component (23); the other end of the spring sheet (22) is bent to form a spring sheet deformation portion (224), then extends to one side and is provided with a step mounting hole (223) for engaging and connecting with the step (214) of the L-pole sheet (21).

12. The socket with overload protection according to claim 11, characterized in that: The L-pole sheet (21) comprises an L-pole connecting sheet (211), a spring-type mounting plate (212) connected to one end of the L-pole connecting sheet (211), and an L-pole sheet plugging plate (213) connected to the other end of the L-pole connecting sheet (211); the L-pole sheet plugging plate (213) is connected to an L-pole wiring terminal (41); a connection between the spring-type mounting plate (212) and the L-pole connecting sheet (211) is bent to form a horizontal support surface; a step (214) is provided on the side of the spring-type mounting plate (212); a step mounting hole (223) of the spring-type (22) is snap-connected to the step (214) of the L-pole sheet (21); and a spring-type deformation portion (224) of the spring-type (22) is supported on the horizontal support surface of the spring-type mounting plate (212).

13. The socket with overload protection as claimed in claim 5, characterized in that: A spring limiting installation groove for installing the return spring (28) is also provided in the radial direction on the rod body at the other end of the button (27).

14. The socket with overload protection as claimed in claim 1, characterized in that: The socket assembly (3) further comprises a ground pole socket (32) and an N pole socket (33), and the terminal assembly (4) further comprises a ground pole terminal (42) and an N pole terminal (43); the ground pole terminal (42) is detachably fixedly connected to a ground pole plug sheet (321) of the ground pole socket (32); and the N pole terminal (43) is detachably fixedly connected to the N pole socket (33).

15. The socket with overload protection as claimed in claim 1, characterized in that: The shell comprises a base (1) and a panel assembly (5), and the base (1) and the panel assembly (5) are detachably assembled via respective clamping structures.

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