An overload protection type terminal block push switch

Abstract

This application discloses an overload protection type terminal block push button switch, comprising: a bottom shell with a first slot, a second slot on the wall of the first slot, and the second slot not communicating with the first slot; a terminal assembly including a live wire terminal, a neutral wire terminal and a ground wire terminal disposed on the bottom shell; a stationary contact piece having a mating part and a plugging part, the mating part being embedded in the second slot and the plugging part being embedded in the live wire terminal; a bimetallic strip having a fixed end and a deformable moving end, the fixed end being connected to the mating part and the deformable moving end having a normal position and an overload position; a moving contact piece having a wiring part and a swinging part, the wiring part being embedded in the first slot and the swinging part being detachably connected to the deformable moving end in the normal position; a top shell fastened to the bottom shell, with a live wire hole, a neutral wire hole and a ground wire hole coplanarly spaced on a circumferential side wall of the top shell; and a ratchet push button mechanism disposed in the top shell, with the bottom of the ratchet push button mechanism abutting against the swinging part.

Description

Technical Field

[0001] This application belongs to the field of push button switch technology, and particularly relates to an overload protection type terminal push button switch. Background Technology

[0002] In push-button switches equipped with a bimetallic strip and a corresponding reset structure, overload protection is achieved by the overload-induced temperature deformation of the bimetallic strip cutting off the conductive structure. Then, the reset structure drives the bimetallic strip to reset, re-establishing the conductive path. Typically, push-button switches also include moving and stationary contacts to cooperate with the bimetallic strip and provide overload protection for the conductive structure. Push-button switches with terminals typically include neutral, live, and ground terminals, which are connected to the neutral, live, and ground wires, respectively. These terminals are usually distributed around the switch body to save material and maintain a certain distance from the internal moving and stationary contacts and bimetallic strip to ensure electrical safety.

[0003] However, when wiring external components to a push-button switch with discretely arranged neutral, live, and ground terminals, the layout of the external conductive structure needs to be adapted to the terminal layout of the push-button switch. This increases the complexity of wiring operations when the push-button switch is installed in products such as power strips and sockets, making operation inconvenient and affecting assembly efficiency. At the same time, it also increases the complexity of the internal structure layout of products such as power strips and sockets. Moreover, the overall structure of push-button switches is large, requiring more installation space, which limits their application in the field of small-sized, compact power strips and sockets. Summary of the Invention

[0004] This application provides an overload protection terminal block push-button switch, aiming to address, to some extent, the technical challenges of ensuring electrical safety, ease of assembly, and structural compactness in compatibility with overload protection push-button switches equipped with bimetallic strips and terminals. Therefore,

[0005] The overload protection terminal block switch of this application embodiment includes:

[0006] The bottom shell has a first slot, and a second slot is formed on the wall of the first slot, and the second slot is not connected to the first slot;

[0007] Terminal assembly, including a live wire terminal, a neutral wire terminal and a ground wire terminal disposed on the bottom housing;

[0008] The stationary contact piece has a mating part and a plug-in part, wherein the mating part is embedded in the second slot and the plug-in part is embedded in the live wire terminal;

[0009] A bimetallic sheet has a fixed end and a deformable movable end, the fixed end being connected to the mating part, and the deformable movable end having a normal position and an overload position;

[0010] The movable contact has a wiring portion and a swing portion. The wiring portion is embedded in the first slot, and the swing portion is detachably connected to the deformable movable end in the normal position.

[0011] The top shell is fastened to the bottom shell. The top shell has a live wire hole, a neutral wire hole and a ground wire hole arranged at intervals on a circumferential side wall. The live wire hole, the neutral wire hole and the ground wire hole are matched and opposite to the plug holes of the live wire terminal, the neutral wire terminal and the ground wire terminal.

[0012] A ratchet button mechanism is disposed inside the top shell, and the bottom of the ratchet button mechanism abuts against the swing part.

[0013] In some embodiments, the overload protection terminal block switch further includes a reset button, which is movably disposed in a guide hole on the top shell and connected to the bimetallic strip to push the overload-deformed bimetallic strip to reset.

[0014] In some embodiments, at least a portion of the grooves of the first slot and the second slot are spaced apart along the thickness direction of the bottom shell.

[0015] In some embodiments, the insertion directions of the first slot and the second slot are opposite, and the insertion directions of the first slot and the second slot are arranged along the width direction of the bottom shell;

[0016] The terminal assembly has a insertion hole that is arranged along the width direction of the bottom shell, and the terminal assembly and the stationary contact are spaced apart on the bottom shell along the width direction of the bottom shell.

[0017] The live wire terminal, the neutral wire terminal, and the ground wire terminal are arranged at intervals along the length of the bottom shell;

[0018] The swinging part and the deformable moving end are arranged at intervals along the thickness direction of the bottom shell, and the swinging direction of the swinging part, the moving direction of the deformable moving end, and the pressing direction of the ratchet button mechanism are set along the thickness direction of the bottom shell.

[0019] In some embodiments, the live wire terminal includes:

[0020] A locking wire frame is movably embedded in the top shell along the thickness direction of the bottom shell. The locking wire frame has the insertion hole and the locking screw hole, and the locking screw hole is arranged along the width direction of the bottom shell.

[0021] The locking bolt is rotatably mounted on the bottom shell and is screwed into the locking bolt hole.

[0022] In some embodiments, a locking countersunk hole is provided on the bottom shell, and the locking bolt is rotatably embedded in the locking countersunk hole. A stop arm is provided at the large-diameter opening of the locking countersunk hole, and the stop arm is positioned on the axial side of the bolt head of the locking bolt to prevent the locking bolt from disengaging from the locking countersunk hole.

[0023] In some embodiments, a sealing plate extends from the locking wire frame along the thickness direction of the bottom shell, so that when the locking wire frame is away from the live wire hole, the sealing plate at least partially blocks the live wire hole.

[0024] In some embodiments, the overload protection terminal block switch further includes an indicator light assembly, the two power terminals of which are electrically connected to the neutral terminal and the swing portion, respectively.

[0025] In some embodiments, the indicator light assembly includes:

[0026] The component frame is movably fitted onto the guide post provided on the top shell, and the position of the component frame is matched with the position of the pressing end of the ratchet button mechanism, so as to drive the ratchet button mechanism to move by pressing the component frame;

[0027] An indicator light is disposed within the component frame, and the indicator light has a first power terminal and a second power terminal;

[0028] A neutral wire contact piece is disposed on the top shell, and the neutral wire contact piece slides against the neutral wire terminal;

[0029] A first conductive spring is inserted into a first limiting hole on the top shell, and the first conductive spring elastically abuts against the first power supply terminal and the neutral wire contact.

[0030] The second conductive spring passes through the second limiting hole on the top shell, and the second conductive spring elastically abuts against the second power supply end and the swing part.

[0031] In some embodiments, the neutral contact is disposed on the outer surface of the top housing.

[0032] The embodiments of this application have at least the following beneficial effects:

[0033] The overload protection terminal block switch provided in this application includes a bottom shell, a terminal assembly, a stationary contact, a bimetallic strip, a moving contact, a top shell, and a ratchet button mechanism. The bottom shell has a first slot, and a second slot is formed on the wall of the first slot; the second slot is not connected to the first slot. The terminal assembly includes a live wire terminal, a neutral wire terminal, and a ground wire terminal disposed on the bottom shell. The stationary contact has a mating portion and a plug-in portion; the mating portion is embedded in the second slot, and the plug-in portion is embedded in the live wire terminal. The bimetallic strip has a fixed end and a deformable movable end; the fixed end is connected to the mating portion... The deformable movable end has a normal position and an overload position; the movable contact has a wiring part and a swinging part, the wiring part is embedded in the first slot, and the swinging part is detachably connected to the deformable movable end in the normal position; the top shell is fastened to the bottom shell, and the top shell has a live wire hole, a neutral wire hole and a ground wire hole arranged coplanarly on a circumferential side wall, and the live wire hole, the neutral wire hole and the ground wire hole are matched and opposite to the insertion holes of the live wire terminal, the neutral wire terminal and the ground wire terminal; the ratchet button mechanism is disposed in the top shell, and the bottom of the ratchet button mechanism abuts against the swinging part.

[0034] Because a first slot is opened on the bottom shell, and a second slot is opened on the wall of the first slot, and the first slot and the second slot are not connected, an electrical isolation structure is formed. This allows the stationary contact and the moving contact to be inserted close to each other while ensuring electrical safety, thus achieving a compact arrangement of the conductive structure and reducing the size of the push-button switch to a certain extent.

[0035] Because the top shell has live wire holes, ground wire holes, and neutral wire holes on one side of its circumference, along with live wire terminals, ground wire terminals, and neutral wire terminals, these terminals can be centrally located on one side of the push-button switch. This facilitates wiring during external installation and improves assembly convenience to some extent. At the same time, the compactly arranged terminal assembly reduces the complexity of the internal conductive structure of products such as plug-in boards and sockets, adapts to the assembly needs of small-sized products, and helps to expand the scope of application.

[0036] In summary, the overload protection terminal block push-button switch provided in this application embodiment can meet the electrical safety requirements of compactly arranging internal conductive structures and terminal components through a housing structure setting. This reduces the overall size of the push-button switch, improves the compactness of the arrangement, and also improves the convenience of external installation, thereby meeting the installation needs of small-sized power strips and sockets. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 An exploded view of the overload protection type terminal block switch provided in an embodiment of this application is shown.

[0039] Figure 2 It shows Figure 1 A schematic diagram of the assembly status of the overload protection terminal block switch;

[0040] Figure 3 It shows Figure 1 An assembly diagram of the bottom shell and terminal assembly of an overload protection type terminal block switch;

[0041] Figure 4 It shows Figure 1 A schematic diagram of the overload protection terminal block switch in the open state;

[0042] Figure 5 It shows Figure 1 A schematic diagram of the on / off state of an overload protection terminal block switch;

[0043] Figure 6 It shows Figure 1 A schematic diagram of the overload protection status of the terminal block switch with overload protection.

[0044] Figure 7 It shows Figure 1 A schematic diagram of the wire-pending state of an overload protection terminal block switch;

[0045] Figure 8 It shows Figure 1 A schematic diagram of the wiring status of an overload protection terminal block switch;

[0046] Figure 9 It shows Figure 1 A schematic diagram of the bottom housing of an overload protection terminal block switch;

[0047] Figure 10 It shows Figure 1 Another schematic diagram of the overload protection type terminal block switch.

[0048] Figure label:

[0049] 1-Bottom shell, 11-First slot, 12-Second slot, 13-Locking countersunk hole, 14-Stop arm, 15-Allowing hole;

[0050] 2-Top shell, 2a-Guide slide groove, 21-Circumferential side wall, 211-Live wire hole, 212-Neutral wire hole, 213-Ground wire hole, 22-Guide post, 23-First limit hole, 24-Second limit hole, 25-Positioning post, 26-Limiting hole, 261-Rib, 27-Reset button, 28-Positioning boss;

[0051] 3-Terminal assembly, 31-Live wire terminal, 311-Locking wire frame, 311a-Wire insertion hole, 311b-Locking screw hole, 311c-Blocking plate, 312-Locking bolt, 32-Neutral wire terminal, 33-Ground wire terminal;

[0052] 4-Stationary contact piece, 41-Mating part, 42-Plug-in part;

[0053] 5-Moving contact piece, 51-Wiring part, 52-Swing part;

[0054] 6-Ratchet button mechanism, 6a-Top pressing part, 6b-Bottom pushing part, 61-Large ratchet, 62-Small ratchet, 63-Reset spring;

[0055] 7-Indicator light assembly, 71-Component frame, 72-Indicator light, 721-First power supply terminal, 722-Second power supply terminal, 73-Neutral wire contact piece, 731-Positioning through hole, 732-Sliding abutment part, 74-First conductive spring, 75-Second conductive spring, 76-Press cap;

[0056] 81 - Ground wire extension strip, 82 - Neutral wire extension strip;

[0057] 9-Bimetallic strip, 91-Fixed end, 92-Deformable moving end, 921-Extension arm, 93-Through hole. Detailed Implementation

[0058] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0059] Furthermore, reference numerals and / or reference letters may be repeated in different examples in this application. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or settings discussed. In addition, this application provides examples of various specific processes and materials, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0060] This application is described below with reference to the accompanying drawings and specific embodiments:

[0061] This application provides an overload protection terminal block push button switch, which aims to solve to some extent the technical problems of electrical safety, ease of assembly, and difficulty in compatibility of overload protection push button switches equipped with bimetallic strips and terminals.

[0062] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 10 In some embodiments, an overload-protected terminal block push-button switch is a push-button switch equipped with terminals and a bimetallic strip. The terminal assembly and the bimetallic strip are connected to the conductive structure inside the push-button switch, and an external conductive line is connected through the terminal assembly to achieve convenient installation.

[0063] The overload protection type terminal block switch includes: a bottom shell 1, a top shell 2, a terminal assembly 3, a stationary contact 4, a moving contact 5, a ratchet button mechanism 6, and a bimetallic strip 9.

[0064] The bottom shell 1 and the top shell 2 are fastened together to form a support structure with an internal cavity for accommodating and installing the terminal assembly 3, the stationary contact 4, the moving contact 5, the ratchet button mechanism 6, and the bimetallic strip 9. The terminal assembly 3 is disposed on the bottom shell 1. The stationary contact 4 is electrically connected to the terminal assembly 3. The bimetallic strip 9 is connected to the stationary contact 4. The moving contact 5 is detachably connected to the bimetallic strip 9. The ratchet button mechanism 6 abuts against the moving contact 5 to push the moving contact 5 to move and lock its position after movement, thereby realizing switch on / off control. In the case of overload, the bimetallic strip 9 can accumulate a large amount of heat, thereby generating directional deformation to disconnect the electrical connection between the bimetallic strip 9 and the moving contact 4, thereby realizing overload circuit breaking protection.

[0065] The bottom shell 1 has a first slot 11 and a second slot 12. The second slot 12 is located on one side wall of the first slot 11, and the first slot 11 and the second slot 12 are not connected to each other, forming a reliable electrical isolation structure. This allows conductive components to be installed in close proximity while ensuring electrical safety when they are inserted into the first slot 11 and the second slot 12. This reduces the space required for the conductive structure inside the push-button switch and helps to reduce the overall size of the push-button switch.

[0066] The top shell 2 has a live wire hole 211, a neutral wire hole 212, and a ground wire hole 213 coplanarly arranged on its circumferential sidewall 21. These allow external conductive lines to be connected to the push-button switch with a uniform amplitude, thus simplifying the operation of connecting external conductive lines to the push-button switch and improving operational convenience and efficiency. It is worth noting that the coplanar arrangement of the live wire hole 211, the neutral wire hole 212, and the ground wire hole 213 mainly refers to the fact that the amplitude of the wire connection operation is relatively uniform and the range is concentrated along the direction of the insertion line. The live wire hole 211, the neutral wire hole 212, and the ground wire hole 213 are roughly flush, allowing the arrangement of external lines to be relatively concentrated. This enables easy connection and avoids overly scattered and complex internal wiring layouts in products such as power strips and sockets, helping to improve the compactness of the internal layout and reduce the overall size of the product.

[0067] The terminal assembly 3 includes a live wire terminal 31, a neutral wire terminal 32, and a ground wire terminal 33. The insertion holes of the live wire terminal 31, the neutral wire terminal 32, and the ground wire terminal 33 are matched and aligned with the live wire hole 211, the neutral wire hole 212, and the ground wire hole 213, respectively, so that external wires can be inserted into the live wire terminal 31, the neutral wire terminal 32, and the ground wire terminal 33 to achieve a stable electrical connection. Correspondingly, the live wire terminal 31, the neutral wire terminal 32, and the ground wire terminal 33 are also roughly flush with the circumferential sidewall 21 to facilitate the insertion of external wires.

[0068] The stationary contact 4 has a mating part 41 and a plugging part 42. The mating part 41 is embedded in the first slot 11, and the plugging part 42 is embedded in the plugging hole of the live wire terminal 31 to maintain the electrical connection between the stationary contact 4 and the live wire terminal 31.

[0069] The bimetallic strip 9 is made of two conductive metal sheets with different coefficients of thermal expansion pressed together. When overload heat buildup occurs, it deforms to different degrees, deforming along a predetermined direction to disconnect the electrical connection with the moving contact 5, thus achieving overload power-off protection. The bimetallic strip 9 has a fixed end 91 and a deformable moving end 92. The fixed end 91 is fixed to the mating part 41 of the stationary contact 4, and the deformable moving end 92 has a normal position and an overload position.

[0070] The movable contact 5 has a wiring portion 51 and a swing portion 52. The wiring portion 51 is embedded in the second slot 12, and the swing portion 52 is a swingable structure that can be detachably connected to the deformable moving end 92 in its normal position. Thus, a conductive path is established through contact between the swing portion 52 and the deformable moving end 92, or the conductive path is broken through separation between the swing portion 52 and the deformable moving end 92, thereby realizing a switching function. When the bimetallic strip 9 deforms due to overload and heat accumulation, the deformable moving end 92 shifts from its normal position, breaking the conductive path and achieving overload circuit breaking protection.

[0071] The ratchet button mechanism 6 is disposed inside the top shell 2, and the top pressing end 6a of the ratchet button mechanism 6 is located outside the top shell 2. The bottom pushing end 6b of the ratchet button mechanism 6 abuts against the swing part 52, thereby switching the position of the bottom pushing end 6b by pressing the top pressing end 6a, that is, relatively closer to the top pressing end 6a or relatively farther away from the top pressing end 6a.

[0072] When the bottom pushing end 6b is positioned close to the top pressing end 6a, the pressure on the swing part 52 is released, causing the swing part 52 to disconnect from the contact electrical connection with the deformable moving end 92 under the action of the elastic restoring force, thereby turning off the switch. When the bottom pushing end 6b is positioned away from the top pressing end 6a, pressure is applied to the swing part 52, causing the swing part 52 to maintain contact electrical connection with the deformable moving end 92, thereby closing the switch.

[0073] It is worth noting that the moving contact 5, the stationary contact 4, the bimetallic strip 9, and the terminal assembly 3 are all conductive structures, and can be made of various conductive materials such as conductive metals; no specific limitations are imposed here. Specifically, the moving contact 5 is made of a conductive material with a certain degree of elastic deformation capability, such as a copper sheet.

[0074] In some embodiments, the ratchet button mechanism 6 is a conventional self-locking button or mechanical holding switch. Its core principle is to achieve "locking" and "unlocking" of the button state through the ratchet mechanism. It includes a large ratchet 61, a small ratchet 62 and a return spring 63 nested in sequence. The large ratchet 61 meshes with the small ratchet 62. The top pressing end 6a is located at the top of the large ratchet 61 and the bottom pushing end 6b is located at the bottom of the return spring 63.

[0075] The top shell 2 has a limiting hole 26 and a rib 261 located in the limiting hole, which, together with the engagement state of the large ratchet 61 and the small ratchet 62, realizes the self-locking button function.

[0076] In some embodiments, considering that multiple terminals in the terminal assembly 3 are arranged coplanarly and centrally, the installation of the conductive structure within the switch requires greater precision and stability, which reduces operational efficiency to some extent. Therefore, the assembly smoothness and operational efficiency can be improved by optimizing the arrangement of the conductive structure and the assembly fixing structure.

[0077] Specifically, the insertion direction of the first slot 11 and the second slot 12 can be set along the width direction of the bottom shell 1, so that during assembly, the mating part 41 can be directly inserted into the first slot 11 and the wiring part 51 can be directly inserted into the second slot 12 along the width direction of the bottom shell 1.

[0078] Generally, the openings of the first slot 11 and the second slot 12 face opposite directions, thereby further reducing the short-circuit risk of the moving contact 5 and the stationary contact 4, thus balancing close-range installation and electrical safety.

[0079] Considering that the stationary contact 4 and the moving contact 5 need to work together to control the opening and closing of the switch, the first slot 11 and the second slot 12 can be arranged nearby.

[0080] In some embodiments, the bimetallic sheet 9 has a through hole 93 in the middle of its sheet-like portion, and the deformable moving end 92 is configured as an extension arm 921 of a certain length. The end of the extension arm 921 is a contact conductive portion that cooperates with the swing portion 52, and the extension arm 921 extends from the side of the through hole 93 away from the fixed end 91 into the through hole 93. The end of the bimetallic sheet 9 away from the fixed end 91 is the deformable portion of the bimetallic sheet 9, specifically, it is raised on one side along the thickness direction.

[0081] In the normal state of the bimetallic strip 9, the end of the bimetallic strip 9 away from the fixed end 91 is bent toward the side closer to the bottom shell 1, and the extension arm 921 is raised away from the bottom shell 1 and protrudes out of the through hole 93, and remains in the current state.

[0082] When the bimetallic strip 9 is under overload, the overload heat accumulates to a certain extent, the bimetallic strip 9 deforms, and the end of the bimetallic strip 9 away from the fixed end 91 bends away from the bottom shell 1. The extension arm 921 moves towards the bottom shell 1 and passes through the through hole 93, disconnecting the contact electrical connection with the swing part 52 and maintaining the current state.

[0083] Generally, the ends of the swinging part 52 and the extension arm 921 are spaced apart in the thickness direction of the bottom shell 1, so that they can be brought close to each other for conductive contact or moved away to disconnect.

[0084] In some embodiments, in order to repeatedly establish the overload power-off function, the overload protection terminal block switch further includes a reset button 27. The reset button 27 is movably inserted into the guide hole 271 opened on the top shell 2, and the reset button 27 is connected to the bimetallic strip 9 to push the overload deformed bimetallic strip 9 to reset.

[0085] Generally, the reset button 27 is connected to the end of the bimetallic strip 9 away from the fixed end 91, so as to press it toward the bottom shell 1, thereby forcing the bimetallic strip 9 to deform as a whole, so that the extension arm 921 passes through the through hole 93 and resets.

[0086] In some embodiments, in order to fully reduce the space occupied by the push-button switch, the first slot 11 and the second slot 12 can be arranged adjacent to each other along the thickness direction of the bottom shell 1, thereby utilizing the space in the thickness direction of the bottom shell 1 to reduce the area occupied in the plane of the bottom shell 1.

[0087] In some embodiments, each terminal in the terminal assembly 3 has a plug hole for inserting a conductive line to achieve an electrical connection.

[0088] To save space in the internal conductive structure of the switch, the insertion holes of each terminal in the terminal assembly 3 can be arranged along the width direction of the bottom shell 1, and the terminal assembly 3, the stationary contact 4, and the bimetallic strip 9 can be spaced apart on the bottom shell 1 along the width direction of the bottom shell 1. Thus, when connecting the stationary contact 4 to the live wire terminal 31, it is only necessary to insert the stationary contact 4 along the width direction of the bottom shell 1.

[0089] It is worth noting that, in order to simplify the assembly operation of the terminal assembly 3 for external wiring, the orientation of the insertion holes of the ground terminal 33 and the neutral terminal 32 is the same as the orientation of the insertion hole of the live terminal 31, which is also along the width direction of the bottom shell 1.

[0090] In some embodiments, the swing portion 52 and the deformable moving end 92 are arranged at intervals along the thickness direction of the bottom shell 1, and the swing direction of the swing portion 52, the moving direction of the deformable moving end 92 and the pressing direction of the ratchet button mechanism 6 are set along the thickness direction of the bottom shell 1.

[0091] In some embodiments, in order to further improve the structural compactness of the push-button switch and reduce the overall size, the live wire terminal 31, the neutral wire terminal 32, and the ground wire terminal 33 are arranged at intervals along the length direction of the bottom shell 1; the first slot 11 and the second slot 12 are arranged at intervals along the length direction of the bottom shell 1; thereby, to a certain extent, the mating gap between the terminal assembly 3 and the stationary contact 4, the moving contact 5, and the bimetallic strip 9 can be reduced, achieving a compact arrangement.

[0092] Similarly, the swinging part 52 and the mating part 41 are arranged at intervals along the thickness direction of the bottom shell 1. The swinging direction of the swinging part 52 and the pressing direction of the ratchet button mechanism 6 are set along the thickness direction of the bottom shell 1. Furthermore, the length direction and the width direction of the bottom shell 1 are orthogonal to the thickness direction of the bottom shell 1. This allows for the use of the space in the case to achieve a three-dimensional arrangement of the conductive structures. The orthogonal arrangement improves the space utilization inside the button switch, thereby helping to improve the compactness of the layout and reduce the overall volume.

[0093] It is worth noting that, since the live wire terminal 31, the neutral wire terminal 32, and the ground wire terminal 33 are arranged approximately flush along the length of the bottom shell 1 to simplify the operation of external wiring, the installation positions of the stationary contact piece 4 and the moving contact piece 5 are arranged at intervals along the length of the bottom shell 1, and the insertion direction is set along the width direction of the bottom shell 1, which is orthogonal to the length direction of the bottom shell 1. This can make full use of the space formed by the terminal assembly 3 in the width direction of the bottom shell 1, and can reduce the installation space in other directions to a certain extent.

[0094] In some embodiments, each terminal in the terminal assembly 3 is installed using a plug-in locking wiring method, and the structural form of each terminal can be set to be consistent. For the sake of simplicity, the following description will take the live wire terminal 31 as an example.

[0095] Specifically, the live wire terminal 31 includes a locking wire frame 311 and a locking bolt 312; the locking wire frame 311 has a wire insertion hole 311a and a locking screw hole 311b, and the locking bolt 312 can be screwed into the locking screw hole 311b, so that the length of the rod of the locking bolt 312 located in the wire insertion hole 311a can be adjusted by rotating the locking bolt 312, thereby pressing or releasing the conductive line embedded in the wire insertion hole 311a.

[0096] Considering that the live wire terminal 31 has a matching stationary contact piece 4 and other wiring terminals in both the width direction and the length direction of the bottom shell 1, the moving direction of the locking wire frame 311 can be set in the thickness direction of the bottom shell 1.

[0097] To prevent the locking bolt 312 from protruding from the bottom shell 1 and being interfered with by external forces, thus affecting the assembly posture, the locking bolt 52 can be rotatably mounted on the bottom shell 1 in its original position. Therefore, the locking frame 311 will be a movable part; that is, the locking frame 311 is configured to be movable along the thickness direction of the bottom shell 1 and is located inside the top shell 2. The locking frame 311 will not be able to rotate around the axis of the thickness direction of the bottom shell 1, so that the locking frame 311 can be driven to move by rotating the locking bolt 312.

[0098] Correspondingly, the locking screw hole 311b is arranged along the thickness direction of the bottom shell 1.

[0099] In some embodiments, in order to reduce the risk of external interference to the locking bolt 312 and keep it rotating in place, a locking countersunk hole 13 can be provided on the bottom shell 1. The locking bolt 312 is rotatably embedded in the locking countersunk hole 13, and a stop arm 14 is provided at the large-diameter opening of the locking countersunk hole 13. The stop arm 14 is blocked on the axial side of the bolt head of the locking bolt 312 to prevent the locking bolt 312 from disengaging from the locking countersunk hole 13.

[0100] In other words, the bolt head of the locking bolt 312 is accommodated by the locking countersunk hole 13, and the bolt head of the locking bolt 312 is completely confined within the locking countersunk hole 13 by the stop arm 14.

[0101] During assembly, the locking bolt 312 can be directly pressed into the locking countersunk hole 13 along the thickness direction of the bottom shell 1, ultimately allowing the bolt head to completely break through the obstruction of the stop arm 14 and enter the locking countersunk hole 13. Correspondingly, the stop arm 14 should be a structural component with elastic deformation and reset capabilities, so that it can deform to allow the locking bolt 312 to pass through, and can reset after the locking bolt 312 has passed through, thereby effectively preventing the locking bolt 312 from disengaging.

[0102] In some embodiments, the stop arms 14 may be configured as two opposing arms, thereby stably restricting the locking bolt 312 from disengaging along the thickness direction of the bottom shell 1 from the radial sides of the bolt head of the locking bolt 312.

[0103] Of course, there can be more than one stop arm 14; or there can be only one stop arm 14, as long as it can prevent the locking bolt 312 from coming off.

[0104] In some embodiments, in order to enable the stop arm 14 to have sufficient deformation clearance capacity and reduce the damage to the locking bolt 312 during installation, clearance holes 15 of a certain length can be provided radially on both sides of the stop arm 14, so that the stop arm 14 has a larger deformation space and avoids damage when subjected to forced compression.

[0105] Of course, the clearance hole 15 can also be configured as a clearance groove.

[0106] In some embodiments, in order to maintain the displacement capability of the locking wire frame 311 along the thickness direction of the bottom shell 1, a guide groove 2a is provided in the top shell 2, the locking wire frame 311 is slidably embedded in the guide groove 2a along the thickness direction of the bottom shell 1, and the wire hole 211 is opened on the side wall of the guide groove 2a.

[0107] The guide groove 2a restricts the rotation of the locking frame 311 by means of shape adaptation or other anti-rotation structure, so as to ensure that it can move along the thickness direction of the bottom shell 1 under the drive of the locking bolt 312.

[0108] It is worth noting that, corresponding to the neutral terminal 32 and the ground terminal 33, the top shell 2 is also provided with a matching guide groove (not shown), and the neutral hole 212 and the ground hole 213 are respectively opened on the side wall of the guide groove of the neutral terminal 32 and the ground terminal 33.

[0109] In some embodiments, when the live wire terminal 31 is awaiting the installation or removal of an external conductive line, the locking frame 311 should be moved to align the insertion hole 311a with the live wire hole 211 to ensure stable insertion of the external conductor. Then, by rotating the locking bolt 312, the locking frame 312 is moved to clamp the conductive element embedded in the insertion hole 311a between the locking frame 311 and the locking bolt 312. At this time, the insertion hole 311a and the live wire hole 211 will no longer be directly aligned, but only partially aligned.

[0110] On the other hand, under conditions such as improper assembly, the locking wire frame 311 is in an abnormal position for wiring, and the insertion hole 311a and the live wire hole 211 are not directly opposite each other, or the relative parts are very small. In such cases, loose connections are likely to occur during assembly, affecting power supply and posing safety risks.

[0111] Therefore, a sealing plate 311c can be provided on the locking wire frame 311, and the sealing plate 311c is arranged in three directions. Through positional cooperation, when the locking wire frame 311 moves away from the live wire hole 211, the sealing plate 311c will lock the movement of the prime locking wire frame 311 and gradually block the live wire hole 211, thereby avoiding misinsertion and preventing external debris from entering the switch through the live wire hole 211, causing short circuits and other safety risks, thus ensuring electrical safety.

[0112] Generally, in the thickness direction of the bottom shell 1, the locking bolt 312 and the sealing plate 311c are located on both sides of the locking wire frame 311, and the specifications of the sealing plate 311c are equivalent to the specifications of the live wire hole 211.

[0113] Correspondingly, the top shell 2 should have a corresponding space or hole at the position of the sealing plate 311c to accommodate the sealing plate 311c and ensure its smooth operation.

[0114] Of course, it is worth noting that the neutral terminal 32 and the ground terminal 33 should also be equipped with sealing plates (not shown) in the same manner as the live terminal 31, in order to improve the overall reliability and safety of power supply.

[0115] In some embodiments, the bottom shell 1 may be configured as a sheet structure with a certain thickness, and the top shell 2 may be configured as a shell structure with a certain cavity, providing working space for each functional component, as well as a corresponding support or fixing structure, such as providing a constraint structure for the ratchet button mechanism 6 for its pressing operation.

[0116] In some embodiments, in order to indicate the working status of the push button switch, the overload protection terminal push button switch further includes an indicator light assembly 7, the two power supply terminals of the indicator light assembly 7 being electrically connected to the neutral terminal 32 and the swing portion 52, respectively.

[0117] When the swinging part 52 contacts the stationary contact 4 and conducts electricity, the indicator light assembly 7 receives power and illuminates, indicating that the overload protection terminal block switch is currently in the closed state. When the swinging part 52 separates from the stationary contact 4, the indicator light assembly 7 is de-energized and extinguishes, indicating that the overload protection terminal block switch is currently in the open state.

[0118] In some embodiments, the indicator light assembly 7 may include: an assembly frame 71, an indicator light 72, a neutral wire contact 73, a first conductive spring 74, and a second conductive spring 75.

[0119] The component frame 71 is movably sleeved on the guide post 22 provided on the top shell 2, and the position of the component frame 71 is matched with the position of the top pressing end 6a of the ratchet button mechanism 6, so that the ratchet button mechanism 6 can be driven to move by pressing the component frame 71.

[0120] The indicator light 72 is disposed within the component frame 71, and the indicator light 72 has a first power terminal 721 and a second power terminal 722; the neutral wire contact 73 is disposed on the top shell 2, and the neutral wire contact 73 slides against the neutral wire terminal 32; the first conductive spring 74 passes through the first limiting hole 23 opened on the top shell 2, and the first conductive spring 74 elastically abuts against the first power terminal 721 and the neutral wire contact 73; the second conductive spring 75 passes through the second limiting hole 24 opened on the top shell 2, and the second conductive spring 75 elastically abuts against the second power terminal 722 and the swing part 52.

[0121] Generally, the component frame 71 is also provided with a press cap 76, and the press cap is provided with a light-transmitting part having a specific warning shape.

[0122] In some embodiments, the neutral contact 73 may be disposed on the surface of the top shell 2, thereby isolating it from the internal conductive structure of the switch. This reduces the space available inside the switch for the conductive structure, allowing the push-button switch to be made smaller while ensuring the integrity of the conductive structure.

[0123] Generally, the top shell 2 is provided with a positioning boss 28, and the neutral wire contact piece 73 is provided with a positioning through hole 731. The neutral wire contact piece 73 can be installed by the cooperation of the positioning boss 28 and the positioning through hole 731.

[0124] In some implementations, the neutral contact 73 is provided with a sliding abutment portion 732, which slides against the neutral terminal 32.

[0125] In some embodiments, a positioning post 25 may be provided on the top shell 2 to facilitate the positioning and installation of the switch.

[0126] In some embodiments, under certain product operating conditions, there may be insufficient wiring length. The overload protection terminal block switch further includes a ground wire extension piece 81 and / or a neutral wire extension piece 82; the ground wire extension piece 81 is pressed into the ground wire terminal 33, and the neutral wire extension piece 82 is pressed into the neutral wire terminal 32.

[0127] The embodiments of this application have at least the following beneficial effects:

[0128] The overload protection terminal block switch provided in this application includes a bottom shell, a terminal assembly, a stationary contact, a bimetallic strip, a moving contact, a top shell, and a ratchet button mechanism. The bottom shell has a first slot, and a second slot is formed on the wall of the first slot; the second slot is not connected to the first slot. The terminal assembly includes a live wire terminal, a neutral wire terminal, and a ground wire terminal disposed on the bottom shell. The stationary contact has a mating portion and a plug-in portion; the mating portion is embedded in the second slot, and the plug-in portion is embedded in the live wire terminal. The bimetallic strip has a fixed end and a deformable movable end; the fixed end is connected to the mating portion... The deformable movable end has a normal position and an overload position; the movable contact has a wiring part and a swinging part, the wiring part is embedded in the first slot, and the swinging part is detachably connected to the deformable movable end in the normal position; the top shell is fastened to the bottom shell, and the top shell has a live wire hole, a neutral wire hole and a ground wire hole arranged coplanarly on a circumferential side wall, and the live wire hole, the neutral wire hole and the ground wire hole are matched and opposite to the insertion holes of the live wire terminal, the neutral wire terminal and the ground wire terminal; the ratchet button mechanism is disposed in the top shell, and the bottom of the ratchet button mechanism abuts against the swinging part.

[0129] Because a first slot is opened on the bottom shell, and a second slot is opened on the wall of the first slot, and the first slot and the second slot are not connected, an electrical isolation structure is formed. This allows the stationary contact and the moving contact to be inserted close to each other while ensuring electrical safety, thus achieving a compact arrangement of the conductive structure and reducing the size of the push-button switch to a certain extent.

[0130] Because the top shell has live wire holes, ground wire holes, and neutral wire holes on one side of its circumference, along with live wire terminals, ground wire terminals, and neutral wire terminals, these terminals can be centrally located on one side of the push-button switch. This facilitates wiring during external installation and improves assembly convenience to some extent. At the same time, the compactly arranged terminal assembly reduces the complexity of the internal conductive structure of products such as plug-in boards and sockets, adapts to the assembly needs of small-sized products, and helps to expand the scope of application.

[0131] In summary, the overload protection terminal block push-button switch provided in this application embodiment can meet the electrical safety requirements of compactly arranging internal conductive structures and terminal components through a housing structure setting. This reduces the overall size of the push-button switch, improves the compactness of the arrangement, and also improves the convenience of external installation, thereby meeting the installation needs of small-sized power strips and sockets.

[0132] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0133] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0134] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indication will also change accordingly. In this application, unless otherwise explicitly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, "fixed" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two components or the interaction relationship between two components, unless otherwise explicitly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances. In addition, the descriptions involving "first," "second," etc., in this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, features defined with "first" or "second" may explicitly or implicitly include one or more of the aforementioned features. In the description of this application, "multiple" means two or more, unless otherwise explicitly and specifically limited.

[0135] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0136] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0137] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. An overload protection type terminal block push button switch characterized by, include: The bottom shell has a first slot, and a second slot is formed on the wall of the first slot, and the second slot is not connected to the first slot; Terminal assembly, including a live wire terminal, a neutral wire terminal and a ground wire terminal disposed on the bottom housing; The stationary contact piece has a mating part and a plug-in part, wherein the mating part is embedded in the second slot and the plug-in part is embedded in the live wire terminal; A bimetallic sheet has a fixed end and a deformable movable end, the fixed end being connected to the mating part, and the deformable movable end having a normal position and an overload position; The movable contact has a wiring portion and a swing portion. The wiring portion is embedded in the first slot, and the swing portion is detachably connected to the deformable movable end in the normal position. The top shell is fastened to the bottom shell. The top shell has a live wire hole, a neutral wire hole and a ground wire hole arranged at intervals on a circumferential side wall. The live wire hole, the neutral wire hole and the ground wire hole are matched and opposite to the plug holes of the live wire terminal, the neutral wire terminal and the ground wire terminal. A ratchet button mechanism is disposed inside the top shell, and the bottom of the ratchet button mechanism abuts against the swing part.

2. The overload protection terminal block key switch of claim 1, wherein, The overload protection terminal block switch also includes a reset button, which is movably inserted into a guide hole on the top shell and connected to the bimetallic strip to push the overload-deformed bimetallic strip to reset.

3. The overload protection terminal block key switch of claim 1, wherein, At least a portion of the first slot and the second slot are spaced apart along the thickness direction of the bottom shell.

4. The overload protection terminal blade switch of claim 3, wherein, The insertion directions of the first slot and the second slot are opposite, and the insertion directions of the first slot and the second slot are arranged along the width direction of the bottom shell; The terminal assembly has a wire insertion hole that is arranged along the width direction of the bottom shell, and the terminal assembly and the stationary contact are spaced apart on the bottom shell along the width direction of the bottom shell. The live wire terminal, the neutral wire terminal, and the ground wire terminal are arranged at intervals along the length of the bottom shell; The swinging part and the deformable moving end are arranged at intervals along the thickness direction of the bottom shell, and the swinging direction of the swinging part, the moving direction of the deformable moving end, and the pressing direction of the ratchet button mechanism are set along the thickness direction of the bottom shell.

5. The overload protection terminal blade switch of claim 1, wherein: The fire wire terminal includes: A locking wire frame is movably embedded in the top shell along the thickness direction of the bottom shell. The locking wire frame has the insertion hole and the locking screw hole, and the locking screw hole is arranged along the width direction of the bottom shell. The locking bolt is rotatably mounted on the bottom shell and is screwed into the locking bolt hole.

6. The overload protection terminal blade switch of claim 5, wherein: The bottom shell has a locking countersunk hole, and the locking bolt is rotatably embedded in the locking countersunk hole. The large-diameter opening of the locking countersunk hole is provided with a stop arm, which blocks the axial side of the bolt head of the locking bolt to prevent the locking bolt from dislodging from the locking countersunk hole.

7. The overload protection terminal blade switch of claim 5, wherein: A sealing plate extends from the locking wire frame along the thickness direction of the bottom shell, so that when the locking wire frame is away from the live wire hole, the sealing plate at least partially blocks the live wire hole.

8. The overload protection type terminal block key switch according to any one of claims 1 to 7, characterized in that, The overload protection terminal block switch also includes an indicator light assembly, the two power terminals of which are electrically connected to the neutral terminal and the swing part, respectively.

9. The overload protection terminal blade switch of claim 8, wherein, The indicator light assembly includes: The component frame is movably fitted onto the guide post provided on the top shell, and the position of the component frame is matched with the position of the pressing end of the ratchet button mechanism, so as to drive the ratchet button mechanism to move by pressing the component frame; An indicator light is disposed within the component frame, and the indicator light has a first power terminal and a second power terminal; A neutral wire contact piece is disposed on the top shell, and the neutral wire contact piece slides against the neutral wire terminal; A first conductive spring is inserted into a first limiting hole on the top shell, and the first conductive spring elastically abuts against the first power supply terminal and the neutral wire contact. The second conductive spring passes through the second limiting hole on the top shell, and the second conductive spring elastically abuts against the second power supply end and the swing part.

10. The overload protection terminal blade switch of claim 9, wherein, The neutral contact is disposed on the outer surface of the top shell.

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