Overload protection switch and electric equipment

Abstract

The utility model discloses an overload protection switch and electric equipment, and relates to the technical field of electric appliances, the overload protection switch comprises a bimetallic strip, the bimetallic strip can be switched between a normal state and an overload state, the bimetallic strip comprises a fixed plate fixed at a preset position, and the fixed plate is provided with a first pin; the deformation frame is connected with the fixed plate, the frame, deviating from the fixed plate, of the deformation frame is a first frame, and a static contact is arranged on the first frame; and the reset structure is connected with the first frame, and the reset structure extends towards the direction of the fixing plate. The number of parts can be reduced, the occupied space of the overload protection switch is reduced, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the field of electrical equipment technology, and in particular to an overload protection switch and electrical equipment. Background Art

[0002] In modern electrical settings, push button switches and overload protection switches are important electrical components. Their settings and installation quality directly affect the stability and ease of use of electrical equipment.

[0003] However, the overload protection switch has many parts, which increases the assembly cost and processing cost. It occupies a large space and also occupies too much socket space when applied to the socket, affecting the overall aesthetics and practicality. Utility Model Content

[0004] The present application provides an overload protection switch and an electrical device, which can reduce the number of parts, reduce the space occupied by the overload protection switch, and reduce costs.

[0005] In a first aspect, the present application provides an overload protection switch, the overload protection switch comprising a bimetallic strip, the bimetallic strip being capable of switching between a normal state and an overload state, the bimetallic strip comprising:

[0006] The fixing plate is fixed at a preset position, and a first pin is arranged on the fixing plate.

[0007] The deformation frame is connected to the fixed plate, the frame of the deformation frame away from the fixed plate is a first frame, and a static contact is arranged on the first frame.

[0008] A reset structure is connected to the first frame, and the reset structure extends toward the fixing plate.

[0009] When the overload protection switch is subjected to an overload current, the deformation frame deforms and causes the bimetallic strip to switch from a normal state to an overload state, and the first frame drives the static contact away from the corresponding moving contact during the deformation process; when the reset structure is subjected to an external force, the reset structure can drive the first frame to approach the moving contact, and the bimetallic strip switches from the overload state to the normal state.

[0010] The fixing plate is used to install the entire bimetallic strip at a corresponding preset position, and the first pin can connect the fixing plate to the corresponding circuit. The deformation frame can be deformed to drive the static contact to move in a direction away from the moving contact when the moving contact is in an overload state and the moving contact cannot move.

[0011] This method of integrally forming the deformation frame and the reset structure can reduce the number of parts, reduce the space occupied by the overload protection switch, and reduce costs.

[0012] The above-mentioned overload current is generated when the overload protection switch is in the on state. At this time, the moving contact and the static contact are originally in abutment with each other. At this time, the deformation frame will apply an elastic preload force toward the static contact. In the overload protection switch in a normal state, the electric repulsive force between the moving contact and the static contact is smaller than the above-mentioned elastic preload force and maintains the on state.

[0013] After the overload current is generated, a large electric repulsion force will be generated between the moving and static contacts. At this time, the electric repulsion force is greater than the elastic preload force generated by the deformation frame itself. After the static contact is repelled from the passive contact to a certain distance, the state of the deformation frame changes. At this time, the elastic preload force will change phase and maintain the static contact away from the moving contact, thereby cutting off the current.

[0014] After the above overload is cut off, the overload protection switch will be completely in a failure state, and the opening or closing of the overload protection switch will be in a circuit-breaking state.

[0015] In some examples, the first frame has a first deformation position, a second deformation position, and a critical position, the critical position is located between the first deformation position and the second deformation position, and the second frame and the third frame adjacent to the first frame can provide elastic preload for the first frame.

[0016] When the first frame is in the first deformation position, the elastic preload force is provided in the direction from the critical position toward the first deformation position. When the first frame is in the second deformation position, the elastic preload force is provided in the direction from the critical position toward the second deformation position.

[0017] Under the action of overload current, the first frame of the deformation frame moves from the first deformation position to the second deformation position. When the first frame exceeds the critical position, the second frame and the third frame generate elastic preload force toward the second deformation position. Under the action of the reset structure, the first frame of the deformation frame moves from the second deformation position to the first deformation position. When the first frame exceeds the critical position, the second frame and the third frame generate elastic preload force toward the first deformation position. The critical position is the position where the direction of the elastic preload force changes.

[0018] In some examples, the reset structure is an arc-shaped plate, which is bent in a direction away from the moving contact. After the reset structure is subjected to an external force, the bent position of the reset structure and the contact point of the preset position can form a fulcrum. The external force applied to the reset structure is transmitted to the first frame through the fulcrum and drives the first frame to move toward the moving contact.

[0019] One of the reset structure settings can be an arc plate. This setting is not only beautiful, but also shows extremely high stability and reliability in practical applications.

[0020] The main feature of the arc plate reset structure is its unique shape setting. This structure bends in the direction away from the moving contact, forming an arc. When the reset structure is subjected to external force, the contact point between its bending position and the preset position will form a fulcrum. This fulcrum is like the hinge of the entire structure, which can effectively convert the external force into internal power, thereby driving the first frame to move in the direction of the moving contact.

[0021] The stability of the arc plate reset structure comes from its unique shape and mechanical properties. Due to its curved arc setting, when subjected to external forces, the structure can maintain a relatively stable shape and is not easily deformed or damaged. This stability allows the arc plate reset structure to maintain good working performance even when it is frequently operated or subjected to large impacts.

[0022] In some examples, a flange structure is provided at the end of the reset structure away from the first frame.

[0023] The flange structure is combined with the end of the reset structure away from the first frame to form a unique and practical combination. The existence of the flange structure not only greatly improves the overall stability and reliability of the reset structure, but also has a stronger bearing capacity when facing external pressure.

[0024] In some examples, the overload protection switch further includes a bottom cover, on which a first assembly groove and a second assembly groove are disposed, and an isolation structure is disposed between the first assembly groove and the second assembly groove.

[0025] The bimetallic strip is installed in the first assembly groove, and the reset structure can abut against the inner wall of the bottom cover and form the fulcrum during the reset process.

[0026] A moving contact structure is installed on the second assembly groove, and the moving contact point is arranged on the moving contact structure.

[0027] After the bimetallic strip is assembled in the first assembly groove and the moving contact structure is assembled in the second assembly groove, the isolation structure can increase the creepage distance between the bimetallic strip and the moving contact structure, reduce or even avoid the relative short circuit between the bimetallic strip and the moving contact structure. The above-mentioned preset position of the present application can be the inner wall of the bottom cover. The bimetallic strip and the moving contact structure are both structures connected to the live wire, and the connection between the two can realize the conduction of the entire circuit, and the disconnection between the two can realize the disconnection of the entire circuit.

[0028] In some examples, a reset hole is opened on the moving contact structure, and the reset hole can avoid the reset rod. After the reset rod passes through the reset hole, it can be connected to or abut the reset structure. The reset rod can apply external force to the reset structure and change the state of the bimetallic strip.

[0029] The setting of the reset hole does not require the additional setting of a corresponding transmission mechanism. The reset rod can be connected or abutted to the reset structure after passing through the middle of the moving contact structure, thereby making the entire overload protection switch have fewer parts and a more compact structure, making the overload protection switch easier to miniaturize.

[0030] In some examples, the overload protection switch further includes an upper cover and a light guide plate, wherein the upper cover is disposed on the bottom cover, the upper cover is connected to the bottom cover, and the light guide plate is connected to the upper cover.

[0031] A reset rod and a guide rod are provided on one side of the light guide plate close to the upper cover, the reset rod is sleeved with a first conductive spring, the guide rod is sleeved with a second conductive spring, the first end of the first conductive spring is connected to the light board in the light guide plate, the second end of the first conductive spring is connected to the moving contact structure, the first end of the second conductive spring is connected to the light board, and the second end of the second conductive spring is connected to the neutral line contact plate on the bottom cover.

[0032] The light guide plate is located on one side of the upper cover. It is not only a decorative part, but also a key component connecting the switch and the indicator light (lamp beads). The reset rod and the guide rod on the light guide plate carry the first conductive spring and the second conductive spring respectively. These two springs can tightly connect the light board with other parts of the overload protection switch.

[0033] Specifically, one end of the first conductive spring is connected to the light board in the light guide plate, and the other end is connected to the moving contact structure; one end of the second conductive spring is also connected to the light board, and the other end is connected to the neutral line contact plate on the bottom cover. This setting not only realizes the electrical connection between the light board and the switch, but also enables the switch and the indicator light to be perfectly integrated together. The combination of the two is easy to assemble and can improve assembly efficiency. When applied to the socket, the appearance of the socket can be simpler because the external structure can be less.

[0034] In some examples, the upper cover is provided with a first guide hole adapted to the reset rod and a second guide hole adapted to the guide rod, the first conductive spring is passed through the first guide hole, and the second conductive spring is passed through the second guide hole.

[0035] The upper cover is provided with a first guide hole adapted to the reset rod and a second guide hole adapted to the guide rod. This arrangement ensures that the reset rod and the guide rod can accurately pass through the corresponding guide holes during operation, thereby achieving precise motion control.

[0036] In some examples, the upper cover is provided with a first guide post and a second guide post, and the light guide plate is provided with a first sliding hole slidably connected to the first guide post, and a second sliding hole slidably connected to the second guide post.

[0037] The upper cover is provided with a first guide post and a second guide post, and the light guide plate is provided with a first sliding hole and a second sliding hole slidably connected to the guide posts. This arrangement enables the light guide plate to slide smoothly when needed, thereby realizing the function of a switch, and the overload protection switch state can be switched by pressing the light guide plate.

[0038] In a second aspect, the present application also provides an electrical device, including the overload protection switch as described above.

[0039] The electrical equipment with the above-mentioned overload protection switch can reduce the number of parts, reduce the space occupied by the overload protection switch, and reduce costs. Specifically, the fixing plate is used to install the entire bimetallic strip at a corresponding preset position, and the first pin can connect the fixing plate to the corresponding circuit. The deformation frame can be deformed to drive the static contact to move in a direction away from the moving contact when it is in an overload state and the moving contact cannot move. This integral molding method of the deformation frame and the reset structure can reduce the number of parts, reduce the space occupied by the overload protection switch, and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the present application or the prior art, the drawings required for use in the examples or prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some examples of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0041] Figure 1 This is a schematic diagram of an exploded structure of an overload protection switch in an example of the present application;

[0042] Figure 2 This is a schematic diagram of a top view of an overload protection switch in an example of the present application;

[0043] Figure 3 This is a side structural diagram of an overload protection switch in an example of the present application;

[0044] Figure 4A schematic cross-sectional view of the structure of an overload protection switch in an example of the present application in a closed state;

[0045] Figure 5 This is a schematic structural cross-sectional diagram of an overload protection switch in an example of the present application in an activated state;

[0046] Figure 6 This is a schematic structural cross-sectional diagram of an overload protection switch in an example of the present application being closed after being overloaded;

[0047] Figure 7 This is a schematic structural cross-sectional diagram of an overload protection switch in an example of the present application when the reset rod is closed for resetting after being overloaded;

[0048] Figure 8 This is a schematic diagram of the structure of the bottom cover of the overload protection switch in an example of the present application;

[0049] Fig. 9 This is a schematic diagram of the side structure when the static contact of the bimetallic strip in the overload protection switch in an example of the present application is close to the moving contact;

[0050] Fig.10 This is a schematic diagram of the structure when the static contact of the bimetallic strip in the overload protection switch in an example of the present application is close to the moving contact;

[0051] Fig.11 This is a schematic diagram of the side structure of a bimetallic strip in an overload protection switch in an example of the present application when the static contact is away from the moving contact after being overloaded;

[0052] Fig.12 This is a schematic diagram of the structure when the static contact of the bimetallic strip in the overload protection switch in an example of the present application is away from the moving contact after being overloaded;

[0053] Fig.13 This is a schematic structural diagram of a moving contact structure in an overload protection switch in an example of the present application;

[0054] Fig.14 This is a schematic diagram of the structure of the upper cover in the overload protection switch in an example of the present application;

[0055] Fig.15 This is a schematic diagram showing the structure of the overload protection switch in an example of the present application, showing the side of the upper cover close to the bottom cover;

[0056] Fig.16 This is a schematic diagram of the structure of a light guide plate in an overload protection switch in an example of the present application;

[0057] Fig.17 This is a structural schematic diagram of the upper side of the lamp board in the overload protection switch in an example of the present application;

[0058] Fig.18This is a schematic diagram of the structure of the lower side of the lamp board in the overload protection switch in an example of the present application.

[0059] Reference numerals:

[0060] 100, bottom cover; 110, first assembly groove; 120, second assembly groove; 130, isolation structure; 140, third assembly groove; 200, upper cover; 210, first guide hole; 220, second guide hole; 230, first guide column; 240, second guide column; 250, switch hole; 260, light guide buckle; 270, positioning rib; 280, avoidance groove; 300, light guide plate; 310, reset rod; 311, first conductive spring; 320, guide rod; 321, second conductive spring; 330, lamp board; 331, lamp bead slot; 332, lamp board positioning hole; 333, conductive position; 340 , first sliding hole; 350, second sliding hole; 400, bimetallic strip; 410, fixing plate; 411, first pin; 420, deformation frame; 421, first frame; 422, second frame; 423, third frame; 424, fourth frame; 430, reset structure; 431, flange structure; 440, static contact; 500, moving contact structure; 510, reset hole; 520, second pin; 530, moving contact; 600, neutral line contact plate; 610, third pin; 620, fourth pin; 700, pressing assembly; 710, upper push rod; 720, lower push rod; 730, switch spring. DETAILED DESCRIPTION

[0061] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific examples described here are only used to explain the present application and are not used to limit the present application.

[0062] To solve the above technical problems, please refer to Figure 1-Figure 18 As shown, the first aspect of the present application proposes an overload protection switch, which can reduce the number of parts, reduce the space occupied by the overload protection switch, and reduce costs.

[0063] Reference Figures 1 to 3 In some examples, the overload protection switch includes a bimetal 400 , which can be switched between a normal state and an overload state. The bimetal 400 includes a fixing plate 410 , a deformation frame 420 , and a reset structure 430 .

[0064] The fixed plate 410 is fixed at a preset position, and a first pin 411 is provided on the fixed plate 410; the deformation frame 420 is connected to the fixed plate 410, and the frame of the deformation frame 420 away from the fixed plate 410 is the first frame 421, and a static contact 440 is provided on the first frame 421; the reset structure 430 is connected to the first frame 421, and the reset structure 430 extends toward the fixed plate 410. The fixed plate 410 is used to install the entire bimetallic strip 400 at a corresponding preset position, and the first pin 411 can connect the fixed plate 410 to the corresponding circuit. The deformation frame 420 can be deformed to drive the static contact to move in a direction away from the moving contact through the deformation frame 420 when in an overload state and the moving contact cannot move.

[0065] This integral molding method of the deformation frame 420 and the reset structure 430 can reduce the number of parts, reduce the space occupied by the overload protection switch, and reduce costs.

[0066] Reference Figures 4 to 7 Specifically, when the overload protection switch is subjected to an overload current, the deformation frame 420 deforms and switches the bimetallic strip 400 from a normal state to an overload state. During the deformation process, the first frame 421 drives the static contact 440 away from the corresponding moving contact 530.

[0067] The above-mentioned overload current is generated when the overload protection switch is in the on state. At this time, the moving contact and the static contact are originally in abutment with each other. At this time, the deformation frame 420 will apply an elastic preload force toward the static contact. In the overload protection switch in a normal state, the electric repulsive force between the moving contact and the static contact is smaller than the above-mentioned elastic preload force and maintains the on state.

[0068] After the overload current is generated, a large electric repulsion force will be generated between the moving and static contacts. At this time, the electric repulsion force is greater than the elastic preload force generated by the deformation frame 420 itself. After the static contact and the passive contact are repelled to a certain distance, the state of the deformation frame 420 changes. At this time, the elastic preload force will change phase and maintain the static contact in a position away from the moving contact, thereby cutting off the current.

[0069] After the above overload is cut off, the overload protection switch will be completely in a failure state, and the opening or closing of the overload protection switch will be in a circuit-breaking state.

[0070] The bimetallic strip 400 may be composed of three parts: a fixing plate 410, a deformation frame 420, and a reset structure 430. The fixing plate 410 is a fixed part of the entire bimetallic strip 400, and the entire bimetallic strip 400 may be firmly mounted at a preset position through the fixing plate 410. The bimetallic strip 400 is provided with a first pin 411 for connecting the bimetallic strip 400 to a circuit.

[0071] The deformation frame 420 is connected to the fixed plate 410 and can be deformed when subjected to external force. In particular, the frame of the deformation frame 420 away from the fixed plate 410 can be called the first frame 421, on which the static contact 440 is installed, and the circuit can be turned on and off by the cooperation of the static contact 440 and the moving contact 530.

[0072] The reset structure 430 is another important component of the bimetallic strip 400, which is connected to the first frame 421 and extends toward the fixed plate 410. The reset structure 430 ensures that after the overload state ends, the bimetallic strip 400 can quickly return to a normal state and be ready for the next work.

[0073] In a normal state, the deformation frame 420 maintains a stable shape, the static contact 440 and the moving contact 530 abut against each other, and the circuit is in a conducting state. At this time, the deformation frame 420 applies a certain elastic preload force to the static contact 440 to ensure the stable operation of the circuit. However, when an overload current appears in the circuit, the situation will change.

[0074] The generation of overload current generates a huge electric repulsive force between the moving contact and the stationary contact. This repulsive force far exceeds the elastic preload force generated by the deformation frame 420 itself, causing the stationary contact 440 to be repelled to a certain distance. In this process, the shape of the deformation frame 420 changes significantly, and the direction of application of the elastic preload force also changes accordingly, maintaining the stationary contact 440 at a position away from the moving contact, thereby achieving circuit disconnection.

[0075] It is worth mentioning that the configuration of the deformable frame 420 and the reset structure 430 formed in one piece in the present application not only reduces the number of parts and the space occupied by the overload protection switch, but also significantly reduces the production cost. At the same time, this configuration also ensures that the overload protection switch can quickly return to a normal state after cutting off the overload current, providing a solid guarantee for the safe and stable operation of the electrical system.

[0076] Specifically, when the overload protection switch is impacted by an overload current, the deformation frame 420 will deform rapidly in a short time and push the static contact 440 away, thereby disconnecting the circuit. In this process, the reset structure 430 can ensure that the deformation frame 420 maintains the deformed position after deformation, ensures that the static contact 440 and the moving contact 530 are away from each other, and can also ensure that after the circuit returns to normal, the static contact 440 is operated by the operator to use the reset structure 430 to re-contact the static contact 440 with the moving contact 530, so that the circuit is restored to the conducting state.

[0077] Reference Figures 4 to 7Specifically, when the reset structure 430 is acted upon by an external force, the reset structure 430 can drive the first frame 421 to approach the moving contact 530, and the bimetal strip 400 switches from the overload state to the normal state.

[0078] The above process can utilize external force to drive the first frame 421 of the deformation frame 420 to move through the reset structure 430, and finally switch the first frame 421 to a position close to the moving contact. At this time, the overload protection switch will be in an effective state, and the opening or closing of the overload protection switch can change the on and off of the overload protection switch.

[0079] When subjected to external force, the reset structure 430 can drive the first frame 421 to approach the moving contact 530 through a series of mechanical transmissions. In this process, the reset structure 430 will make full use of the external force to move the first frame 421 of the deformation frame 420 from the overload state to the normal state.

[0080] When the overload protection switch of the above structure is applied to a socket, the space occupied by the overload protection switch can be reduced, and the remaining space of the socket can be increased. While ensuring the safety of the socket, the socket can be made more compact and beautiful, thereby improving the overall aesthetics and practicality of the socket.

[0081] Reference Figures 9 to 12 In some examples, the first frame 421 has a first deformation position, a second deformation position and a critical position, the critical position is between the first deformation position and the second deformation position, and the second frame 422 and the third frame 423 adjacent to the first frame 421 can provide elastic preload for the first frame 421;

[0082] When the first frame 421 is in the first deformation position, there is an elastic preload in the direction from the critical position toward the first deformation position, and when the first frame 421 is in the second deformation position, there is an elastic preload in the direction from the critical position toward the second deformation position. The magnitude of the elastic preload may be less than or equal to 3N, and may be set according to actual needs. When a greater force is required, it may also be greater than 3N.

[0083] Under the action of overload current, the first frame 421 of the deformation frame 420 moves from the first deformation position to the second deformation position. When the first frame 421 exceeds the critical position, the second frame 422 and the third frame 423 generate elastic preload force in the direction of the second deformation position; under the action of the reset structure 430, the first frame 421 of the deformation frame 420 moves from the second deformation position to the first deformation position. When the first frame 421 exceeds the critical position, the second frame 422 and the third frame 423 generate elastic preload force in the direction of the first deformation position. The critical position is the position where the direction of the elastic preload force changes. The fourth frame 424 of the deformation frame 420 is a frame opposite to the first frame 421, and the fourth frame 424 is fixedly connected to the fixed plate 410. The fixed connection can be performed by welding, clamping, threaded connection, fixing member connection, etc.

[0084] The first frame 421 of the deformation frame 420 not only has a clear first deformation position and a second deformation position, but more importantly, the first frame 421 also has a critical position, which is located exactly between the first deformation position and the second deformation position. The setting of this critical position cleverly realizes the switching of the direction of the elastic preload force. When the first frame 421 works in conjunction with the adjacent second frame 422 and the third frame 423, they jointly provide the first frame 421 with the necessary elastic preload force.

[0085] Specifically, when the first frame 421 is in the first deformation position, the elastic preload force is applied from the critical position to the first deformation position. This force ensures that the frame can remain stable and prevent excessive deformation when subjected to a certain external force. When the first frame 421 is subjected to a greater external force, such as the influence of an overload current, causing it to move to the second deformation position, the direction of the elastic preload force also changes accordingly, and is applied from the critical position to the second deformation position. This adaptive elastic preload force mechanism enables the deformation frame 420 to maintain a stable shape and performance under different external forces.

[0086] When the overload current disappears, the deformation frame 420 needs to be restored to its original state. At this time, under the action of the reset structure 430, the first frame 421 begins to move from the second deformation position to the first deformation position. Similarly, when the first frame 421 crosses the critical position again, the second frame 422 and the third frame 423 will generate an elastic preload force toward the first deformation position. This force helps the deformation frame 420 to quickly restore to its original state and prepare for the next current shock.

[0087] Reference Figures 9 to 12In some examples, the reset structure 430 is an arc-shaped plate, which is bent in a direction away from the moving contact 530. After the reset structure 430 is subjected to an external force, the bent position of the reset structure 430 and the contact point of the preset position can form a fulcrum, and the external force on the reset structure 430 is transmitted to the first frame 421 through the fulcrum and drives the first frame 421 to move in the direction of the moving contact 530. The arc-shaped plate can have higher stability, and the reset structure 430 can also be set as a bent plate as needed, and at least one bent portion of the bent plate can form the above-mentioned fulcrum.

[0088] One of the configuration forms of the reset structure 430 may be an arc-shaped plate, which is not only beautiful but also exhibits extremely high stability and reliability in practical applications.

[0089] The main feature of the arc plate reset structure 430 is its unique shape setting. This structure bends in the direction away from the moving contact 530 to form an arc. When the reset structure 430 is subjected to external force, the contact point between its bent position and the preset position will form a fulcrum. This fulcrum is like the hinge of the entire structure, which can effectively convert the external force into internal power, thereby driving the first frame 421 to move in the direction of the moving contact 530.

[0090] The stability of the arc plate reset structure 430 is derived from its unique shape and mechanical properties. Due to its curved arc setting, when subjected to external forces, the structure can maintain a relatively stable shape and is not easily deformed or damaged. This stability allows the arc plate reset structure 430 to maintain good working performance when frequently operated or subjected to large impacts.

[0091] The arc-shaped plate-shaped reset structure 430 is also highly flexible and customizable. In practical applications, we can adjust the parameters of the reset structure 430 according to different needs and environmental conditions. For example, the curvature of the arc plate, the hardness and thickness of the material, and other factors can be adjusted to adapt to different working environments. This flexibility makes the arc-shaped plate reset structure 430 have a wide range of application prospects and can be applied to various mechanical devices that require a reset function.

[0092] In addition to the arc plate reset structure 430, the bent plate reset structure 430 is also a common choice. The bent plate reset structure 430 has at least one bent portion, which can form a fulcrum when subjected to an external force, thereby driving the first frame 421 to move. The bent plate reset structure 430 is relatively simple to set up and has a low cost, and is suitable for some cost-sensitive application scenarios.

[0093] In practical applications, the reset structure 430 of the curved plate and the reset structure 430 of the bent plate each have their own advantages and disadvantages. The curved plate reset structure 430 has higher stability and reliability, and is suitable for occasions with higher performance requirements; while the bent plate reset structure 430 has lower cost and better flexibility, and is suitable for cost-sensitive occasions. Therefore, when selecting the reset structure 430, it is necessary to comprehensively consider various factors according to the specific application scenario and requirements, and select the most suitable reset structure 430 form.

[0094] Reference Figures 9 to 13 In some examples, the end of the reset structure 430 away from the first frame 421 is provided with a flange structure 431. The flange structure 431 can make the force-bearing part of the reset structure 430 more stable and reliable, and the flange structure 431 can withstand greater external pressure.

[0095] The flange structure 431 can be set as a single-fold flange, or a double-fold flange, or a triple-fold flange. The drawings of the present application take a double-fold flange as an example for illustrative description.

[0096] The flange structure 431 is combined with the end of the reset structure 430 away from the first frame 421 to form a unique and practical combination. The existence of the flange structure 431 not only greatly improves the overall stability and reliability of the reset structure 430, but also has a stronger bearing capacity when facing external pressure.

[0097] The setting principle of the flange structure 431 is based on the mechanical balance and stress distribution principle in material mechanics. By adding flanges at specific positions of the reset structure 430, the force-bearing part of the reset structure 430 can be strengthened, thereby ensuring that the structure can remain stable when subjected to external forces without unexpected deformation or damage.

[0098] The flange structure 431 can be set to a variety of forms such as a single-fold flange, a double-fold flange or a triple-fold flange. These different forms of flange structures 431 can be selected according to specific application scenarios and requirements. For example, in a scenario that needs to withstand greater pressure, it can be selected to be set to a multi-fold flange structure 431 to increase the strength and stability of the structure. In some scenarios with strict space requirements, it can be selected to be set to a single-fold flange structure 431 to save space and meet usage requirements. In the drawings of the present application, a double-fold flange is used as an example for exemplary description. This setting not only ensures the strength and stability of the structure, but also saves space to a certain extent.

[0099] In some examples, the overload protection switch further includes a bottom cover 100, on which a first assembly groove 110 and a second assembly groove 120 are disposed, and an isolation structure 130 is disposed between the first assembly groove 110 and the second assembly groove 120. The isolation structure 130 is used to separate the first assembly groove 110 and the second assembly groove 120, and the isolation structure 130 is specifically referred to in Figure 8 .

[0100] The bimetal strip 400 is installed in the first assembly groove 110, and the reset structure 430 can abut against the inner wall of the bottom cover 100 and form a fulcrum during the reset process; the moving contact structure 500 is installed on the second assembly groove 120, and the moving contact 530 is arranged on the moving contact structure 500.

[0101] After the bimetal 400 is assembled in the first assembly groove 110 and the moving contact structure 500 is assembled in the second assembly groove 120, the isolation structure 130 can increase the creepage distance between the bimetal 400 and the moving contact structure 500, reduce or even avoid the relative short circuit between the bimetal 400 and the moving contact structure 500. The above-mentioned preset position of the present application can be the inner wall of the bottom cover 100. The bimetal 400 and the moving contact structure 500 are both structures connected to the live wire, and the connection between the two can realize the conduction of the entire circuit, and the disconnection between the two can realize the disconnection of the entire circuit.

[0102] Specifically, the bottom cover 100 is provided with a first assembly groove 110 and a second assembly groove 120, which are separated by an isolation structure 130. The isolation structure 130 not only effectively separates the first assembly groove 110 and the second assembly groove 120, but also plays a vital role in electrical safety.

[0103] The bimetal strip 400 is installed in the first assembly slot 110. The moving contact structure 500 is installed in the second assembly slot 120. The moving contact 530 on the moving contact structure 500 can cooperate with the static contact 440 on the bimetal strip 400 to realize the switching of circuit conduction and disconnection.

[0104] It is worth noting that the isolation structure 130 ensures the independence of the two assembly grooves and also increases the creepage distance between the bimetallic strip 400 and the moving contact structure 500. Creepage distance is an important safety parameter in electrical equipment settings, which refers to the shortest distance between two conductive parts along the surface of a solid insulating material. Increasing the creepage distance can effectively reduce or even avoid the relative short circuit between the bimetallic strip 400 and the moving contact structure 500 in a humid, polluted environment, thereby greatly improving the safety performance of the overload protection switch.

[0105] The bottom cover 100 may also be provided with a third assembly groove 140 for installing the neutral line touch plate 600. The neutral line touch plate 600 is an indispensable part of the circuit and is responsible for connecting the neutral line of the circuit to ensure the stable operation of the circuit. This arrangement enables the overload protection switch to protect the circuit while also ensuring the normal operation of the circuit.

[0106] The above-mentioned overload protection switch of the present application is set up with full consideration of the safety and stability of the circuit. Through the clever setting of the assembly slot and the isolation structure 130, the circuit can be quickly disconnected when the circuit is overloaded to avoid serious accidents such as fire; at the same time, by increasing the creepage distance and installing the neutral line contact plate 600 and other measures, the stability and safety of the circuit during normal operation can also be ensured.

[0107] Reference Fig.13 In some examples, a reset hole 510 is opened on the moving contact structure 500, and the reset hole 510 can avoid the reset rod 310. After passing through the reset hole 510, the reset rod 310 can be connected to or abut against the reset structure 430. The reset rod 310 can apply external force to the reset structure 430 and change the state of the bimetallic strip 400.

[0108] The setting of the reset hole 510 does not require the additional setting of a corresponding transmission mechanism. The reset rod 310 can be connected or abutted to the reset structure 430 after passing through the middle of the moving contact structure 500, thereby making the entire overload protection switch have fewer parts and a more compact structure, making the overload protection switch easier to miniaturize.

[0109] The overload protection switch can quickly cut off the circuit when the current exceeds the device's tolerance range, thereby protecting the device from damage.

[0110] A reset hole 510 is provided on the movable contact structure 500. The reset hole 510 is used to avoid the reset rod 310, so that the reset rod 310 can smoothly pass through the movable contact structure 500, and then connect or abut against the reset structure 430. When the state of the bimetal 400 needs to be changed, the reset rod 310 can play a role. By applying external force to the reset structure 430, the reset rod 310 can change the bending degree of the bimetal 400 until the state of the bimetal 400 is changed, thereby adjusting the triggering threshold of the overload protection switch.

[0111] The arrangement of the reset hole 510 has multiple advantages in the arrangement of the overload protection switch. The transmission mechanism that needs to be additionally arranged in the traditional arrangement is omitted, and the structure of the entire overload protection switch is simplified. By passing the reset rod 310 through the middle of the moving contact structure 500, the reset rod 310 can be directly connected to the reset structure 430, which reduces the number of parts and reduces the production cost.

[0112] The arrangement of the reset hole 510 makes the structure of the overload protection switch more compact, and more functional components can be accommodated in the same space, thereby improving the integration of the device.

[0113] The setting of the reset hole 510 makes it easier to miniaturize the overload protection switch. With the continuous development of modern electrical equipment, the requirements for equipment size are getting higher and higher. The setting of the reset hole 510 enables the overload protection switch to better adapt to this trend and meet the market demand for miniaturized equipment.

[0114] Reference Figures 14 to 16 In some examples, the overload protection switch further includes an upper cover 200 and a light guide plate 300, the upper cover 200 is disposed on the bottom cover 100, the upper cover 200 is connected to the bottom cover 100, and the light guide plate 300 is connected to the upper cover 200;

[0115] A reset rod 310 and a guide rod 320 are provided on one side of the light guide plate 300 close to the upper cover 200, a first conductive spring 311 is sleeved on the reset rod 310, a second conductive spring 321 is sleeved on the guide rod 320, a first end of the first conductive spring 311 is connected to the light board 330 in the light guide plate 300, a second end of the first conductive spring 311 is connected to the moving contact structure 500, a first end of the second conductive spring 321 is connected to the light board 330, and a second end of the second conductive spring 321 is connected to the neutral line contact plate 600 on the bottom cover 100.

[0116] The above structure can electrically connect the light board 330 on the light guide plate 300 to the overload protection switch, so that the switch and the indicator light can be integrated together, which is convenient for assembly and improves efficiency. When applied to a socket, the appearance of the socket can be made more concise.

[0117] In the structure of the overload protection switch, the upper cover 200 is the main part of the entire switch, and the cover is arranged on the bottom cover 100 to ensure the stability and safety of the internal structure. There are various ways to connect the upper cover 200 and the bottom cover 100, including but not limited to snap-on, bolt connection, bonding, magnetic attraction, etc. The choice of these connection methods depends entirely on the specific usage scenario and customer needs. In this application, snap-on is used as an example for explanation, which is not only easy to install, but also easy to disassemble, and convenient for later maintenance.

[0118] The light guide plate 300 is located on one side of the upper cover 200. It is not only a decorative part, but also a key component connecting the switch and the indicator light (lamp beads). On the light guide plate 300, the reset rod 310 and the guide rod 320 respectively carry the first conductive spring 311 and the second conductive spring 321. These two springs can tightly connect the lamp board 330 with other parts of the overload protection switch.

[0119] Specifically, one end of the first conductive spring 311 is connected to the light board 330 in the light guide plate 300, and the other end is connected to the moving contact structure 500; one end of the second conductive spring 321 is also connected to the light board 330, and the other end is connected to the neutral line contact plate 600 on the bottom cover 100. This arrangement not only realizes the electrical connection between the light board 330 and the switch, but also enables the switch and the indicator light to be perfectly integrated. The combination of the two facilitates assembly and can improve assembly efficiency. When applied to a socket, the appearance of the socket can be simpler because the structure displayed on the outside can be less.

[0120] This setting of the present application greatly simplifies the assembly process of the switch and improves production efficiency. At the same time, due to the integration of the switch and the indicator light, the appearance of the entire socket is more concise and beautiful after being applied to the socket. In addition, this setting also improves the safety of the product. Because when the circuit is overloaded, the overload protection switch will quickly cut off the power supply, and the indicator light will immediately go out at this time, reminding the user that the circuit has been disconnected, thereby avoiding safety accidents caused by misoperation.

[0121] Reference Fig.14 In some examples, the upper cover 200 is provided with a first guide hole 210 adapted to the reset rod 310 and a second guide hole 220 adapted to the guide rod 320, the first conductive spring 311 is passed through the first guide hole 210, and the second conductive spring 321 is passed through the second guide hole 220.

[0122] The upper cover 200 is provided with a first guide hole 210 adapted to the reset rod 310 and a second guide hole 220 adapted to the guide rod 320. This arrangement ensures that the reset rod 310 and the guide rod 320 can accurately pass through the corresponding guide holes during operation, thereby achieving precise motion control.

[0123] In order to further enhance the accuracy of this control, the first conductive spring 311 is inserted into the first guide hole 210, and the second conductive spring 321 is inserted into the second guide hole 220. These conductive springs not only play a guiding and fixing role, but also can provide power connection to a certain extent, providing necessary support for the normal operation of the device.

[0124] In some examples, the upper cover 200 is provided with a first guide column 230 and a second guide column 240 , and the light guide plate 300 is provided with a first sliding hole 340 slidably connected to the first guide column 230 , and a second sliding hole 350 slidably connected to the second guide column 240 .

[0125] The upper cover 200 is provided with a first guide post 230 and a second guide post 240, and the light guide plate 300 is correspondingly provided with a first sliding hole 340 and a second sliding hole 350 slidably connected to the guide posts. This arrangement enables the light guide plate 300 to slide smoothly when needed, thereby realizing the function of a switch, and the overload protection switch state can be switched by pressing the light guide plate 300.

[0126] In order to improve the stability of the sliding connection, positioning ribs 270 are provided on the first guide column 230 and the second guide column 240. These positioning ribs 270 can be closely matched with the corresponding structure in the sliding hole, effectively preventing shaking or deviation during the sliding process. This arrangement not only improves the overall stability of the device, but also brings a smoother and more reliable use experience to the user.

[0127] In order to prevent the light guide plate 300 from accidentally falling off during the sliding process, light guide buckles 260 are also provided on the first guide column 230 and the second guide column 240. These light guide buckles 260 can be automatically locked when the light guide plate 300 slides to a specified position, thereby ensuring a stable connection of the light guide plate 300. This arrangement not only enhances the durability of the device, but also avoids the risk of device damage or user injury caused by the light guide plate 300 falling off.

[0128] The first guide column 230 and the second guide column 240 of the present application are both provided with a light guide buckle 260 and a positioning rib 270. The light guide buckle 260 can be snapped onto the light guide plate 300 to prevent accidental detachment of the light guide plate 300. The positioning rib 270 can position the sliding of the light guide plate 300 to improve the stability of the light guide plate 300 during the sliding process.

[0129] The overload protection switch of the present application also has a pressing assembly 700, which includes an upper push rod 710 and a lower push rod 720. The upper push rod 710 and the lower push rod 720 are mutually sleeved, and tooth structures are respectively provided at some positions and mesh with each other. The light guide plate 300 itself or the light board 330 thereon can abut or be connected to the upper push rod 710, and a switch hole 250 is provided on the upper cover 200. Both the upper push rod 710 and the lower push rod 720 can be slidably connected to the switch hole 250. A sleeve structure that is compatible with the switch hole 250 is provided on the side of the upper cover 200 close to the bottom cover 100, and an avoidance groove 280 is provided on the sleeve structure (refer to Fig.15 ), the avoidance groove 280 is used to avoid the moving contact structure 500, and the moving area of ​​the moving contact structure 500 can also be limited by the groove wall of the avoidance groove 280 to ensure that the moving contact 530 on the moving contact structure 500 can be close to or away from the static contact 440.

[0130] A blind hole is provided on the side of the lower push rod 720 away from the upper push rod 710, and a switch spring 730 is provided in the blind hole. The switch spring 730 can abut against the moving contact structure 500. The upper push rod 710 and the lower push rod 720 have at least two matching positions. In one matching position, the moving contact 530 on the moving contact structure 500 is always spaced from the static contact 440. There is at least one matching position that allows the moving contact 530 to abut against the static contact 440. Pressing the upper push rod 710 to a certain extent and then releasing it can achieve the switching of the matching position, and pressing it again can continue to change the matching position. The above structure is similar to the adjustment structure in the automatic pen.

[0131] The pressing of the upper push rod 710 can be achieved by directly pressing the light guide plate 300. Each time the pressing process is performed, the reset rod 310 can be pushed toward the reset structure 430. When the bimetal 400 is overloaded and away from the moving contact 530, the bimetal 400 can be reset by pressing the light guide plate 300.

[0132] Reference Fig.17 and Fig.18 The light board 330 in the present application has a front side and a back side. Fig.17 3 shows a schematic diagram of the front side of the lamp board 330, that is, the upper side of the lamp board 330, the upper side of the lamp board 330 is provided with a lamp bead slot 331 and a lamp board 330 positioning hole, and at least one lamp bead can be provided on the lamp bead slot 331. The lamp board 330 positioning hole is used to cooperate with the light guide plate 300. Fig.18 3 shows a schematic diagram of the back side of the lamp board 330, that is, the lower side of the lamp board 330. The lower side of the lamp board 330 is provided with two conductive positions 333 arranged at intervals. One of the conductive positions 333 is electrically connected to the first conductive spring 311, and the other conductive position 333 is electrically connected to the second conductive spring 321. The light guide plate 300 may be provided with a receiving groove, and the lamp board 330 is installed in the receiving groove. The receiving groove may be provided with a positioning rib, and the positioning rib can stably clamp the lamp board 330 into the receiving groove.

[0133] In a second aspect, the present application also provides an electrical device, including the overload protection switch as described above.

[0134] The electrical equipment with the above-mentioned overload protection switch can reduce the number of parts, reduce the space occupied by the overload protection switch, and reduce costs. Specifically, the fixing plate 410 is used to install the entire bimetallic strip 400 at a corresponding preset position, and the first pin 411 can connect the fixing plate 410 to the corresponding circuit. The deformation frame 420 can be deformed to drive the static contact to move in a direction away from the moving contact through the deformation frame 420 when it is in an overload state and the moving contact cannot move. This integral molding method of the deformation frame 420 and the reset structure 430 can reduce the number of parts, reduce the space occupied by the overload protection switch, and reduce costs.

[0135] The electrical equipment includes but is not limited to one of a socket, a fan, an electric heater, an air conditioner, an electric car, a car, a tank, and an airplane. The overload protection switch can be applied to the corresponding electrical equipment as needed.

[0136] The same or similar numbers in the drawings of this application correspond to the same or similar parts; in the description of this application, it should be understood that if the terms "upper", "lower", "left", "right", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings. This is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0137] The above are only preferred examples of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. An overload protection switch, characterized in that: The overload protection switch comprises a bimetallic strip, which can be switched between a normal state and an overload state, and the bimetallic strip comprises: A fixing plate, fixed at a preset position, wherein a first pin is provided on the fixing plate; A deformation frame is connected to the fixed plate, the frame of the deformation frame away from the fixed plate is a first frame, and a static contact is arranged on the first frame; A reset structure connected to the first frame, the reset structure extending toward the fixing plate; When the overload protection switch is subjected to an overload current, the deformation frame deforms and causes the bimetallic strip to switch from a normal state to an overload state, and the first frame drives the static contact away from the corresponding moving contact during the deformation process; When the reset structure is acted upon by an external force, the reset structure can drive the first frame to approach the moving contact, and the bimetallic strip is switched from the overload state to the normal state.

2. The overload protection switch according to claim 1, characterized in that: The first frame has a first deformation position, a second deformation position and a critical position, the critical position is located between the first deformation position and the second deformation position, and the second frame and the third frame adjacent to the first frame can provide elastic pre-tightening force for the first frame; When the first frame is in the first deformation position, the elastic preload force is provided in the direction from the critical position toward the first deformation position. When the first frame is in the second deformation position, the elastic preload force is provided in the direction from the critical position toward the second deformation position.

3. The overload protection switch according to claim 2, characterized in that: The reset structure is an arc-shaped plate, which is bent in a direction away from the moving contact. After the reset structure is subjected to an external force, the bent position of the reset structure and the contact point of the preset position can form a fulcrum. The external force applied to the reset structure is transmitted to the first frame through the fulcrum and drives the first frame to move in the direction of the moving contact.

4. The overload protection switch according to claim 3, characterized in that: The end of the reset structure away from the first frame is provided with a flange structure.

5. The overload protection switch according to claim 3, characterized in that: The overload protection switch further comprises a bottom cover, on which a first assembly groove and a second assembly groove are arranged, and an isolation structure is arranged between the first assembly groove and the second assembly groove; The bimetallic strip is installed in the first assembly groove, and the reset structure can abut against the inner wall of the bottom cover and form the fulcrum during the reset process; A moving contact structure is installed on the second assembly groove, and the moving contact point is arranged on the moving contact structure.

6. The overload protection switch according to claim 5, characterized in that: The overload protection switch further comprises an upper cover and a light guide plate, wherein the upper cover is arranged on the bottom cover, the upper cover is connected to the bottom cover, and the light guide plate is connected to the upper cover; A reset rod and a guide rod are provided on one side of the light guide plate close to the upper cover, the reset rod is sleeved with a first conductive spring, the guide rod is sleeved with a second conductive spring, the first end of the first conductive spring is connected to the light board in the light guide plate, the second end of the first conductive spring is connected to the moving contact structure, the first end of the second conductive spring is connected to the light board, and the second end of the second conductive spring is connected to the neutral line contact plate on the bottom cover.

7. The overload protection switch according to claim 6, characterized in that: A reset hole is provided on the moving contact structure, and the reset hole can avoid the reset rod. After passing through the reset hole, the reset rod can be connected to or abut against the reset structure. The reset rod can apply external force to the reset structure and change the state of the bimetallic strip.

8. The overload protection switch according to claim 6, characterized in that: The upper cover is provided with a first guide hole matched with the reset rod and a second guide hole matched with the guide rod, the first conductive spring is passed through the first guide hole, and the second conductive spring is passed through the second guide hole.

9. The overload protection switch according to claim 6, characterized in that: The upper cover is provided with a first guide post and a second guide post, and the light guide plate is provided with a first sliding hole slidably connected to the first guide post, and a second sliding hole slidably connected to the second guide post.

10. An electrical device, characterized in that: The invention comprises the overload protection switch according to any one of claims 1 to 9.

Images