A terminal block type overload protector

Abstract

This application discloses a terminal block type overload protector, belonging to the technical field of overload protectors; it includes: a first housing and a second housing that snap together, the first housing having a first insertion slot, and the second housing having a second insertion slot and a guide slot; a first contact piece, inserted into the first insertion slot; a bimetallic strip having a fixed end, an electrical connection end, and a swing end, the fixed end being connected to the first contact piece; a first terminal block, inserted into the second insertion slot; a second contact piece, connected to the terminal block, and the second contact piece being electrically connected to the electrical connection end in an openable and closable manner; a rotating lever, including a rotating shaft, a first lever arm, and a second lever arm, the rotating shaft being rotatably connected to the second housing, the first lever arm and the second lever arm being spaced apart along the circumference of the rotating shaft, and the first lever arm being positioned on one side of the swing end; a reset button, movably disposed in the guide slot, and the reset button being positioned on one side of the second lever arm. The terminal block type overload protector provided by this application has a simple structure and is easy to assemble.

Description

Technical Field

[0001] This application belongs to the field of overload protection technology, and particularly relates to a terminal block type overload protector. Background Technology

[0002] An overload protector is installed within electrical equipment to cut off the circuit when the equipment is overloaded, thereby protecting the electrical components within the equipment. Typically, an overload protector includes terminals, a bimetallic strip, and a reset mechanism. The bimetallic strip is connected between two terminals and can deform under overload conditions to disconnect the electrical connection with the terminals. The reset mechanism, in conjunction with the bimetallic strip, pushes the bimetallic strip to its original deformed state, re-establishing the electrical connection with the terminals.

[0003] To meet the growing demand for miniaturized and sophisticated electrical equipment, the arrangement of its internal components and functional structures typically requires rigorous design. While ensuring functional reliability, the overall structural dimensions must also be strictly limited to minimize the installation space required. This strict miniaturization design, to some extent, increases the overall assembly difficulty, necessitating manual intervention in the assembly process to ensure precision; however, this also reduces assembly efficiency to some degree. Summary of the Invention

[0004] This application provides a terminal block type overload protector, aiming to at least partially solve the technical problems of high assembly difficulty, low automation level, and low assembly efficiency of small-size terminal block type overload protectors. Therefore,

[0005] One aspect of this application provides a terminal block type overload protector, comprising:

[0006] The first housing and the second housing are fastened together. The first housing has a first insertion groove, and the second housing has a second insertion groove and a guide groove.

[0007] The first contact piece is inserted into the first insertion slot;

[0008] A bimetallic strip has a fixed end, an electrical connection end, and a swing end. The fixed end is connected to the first contact piece, and the swing end has a first swing position and a second swing position, so that when the bimetallic strip is overloaded and deformed by heat accumulation, the swing end will swing from the first position to the second position and guide the electrical connection end to move.

[0009] The first terminal is inserted into the second insertion slot;

[0010] The second contact is connected to the terminal block, and the second contact is electrically connected to the electrical connection terminal in a closable manner.

[0011] A rotating lever includes a rotating shaft, a first lever arm, and a second lever arm. The rotating shaft is rotatably connected to the second housing. The first lever arm and the second lever arm are circumferentially spaced on the rotating shaft, and the first lever arm is positioned on one side of the swing end to push the swing end to move or reset under the push of the swing end.

[0012] A reset button is movably disposed within the guide groove, and the reset button is positioned on one side of the second lever arm to push the second lever arm to rotate or to reset under the push of the second lever arm.

[0013] In some embodiments, the insertion direction of the first terminal, the swing direction of the swing end, and the displacement direction of the electrical connection end are generally arranged along the snap-fit ​​direction of the first housing and the second housing.

[0014] In some embodiments, a wire insertion hole is provided on the side wall of the second insertion slot, the second contact piece is inserted into the wire insertion hole, and a portion of the second contact piece is located in the first terminal block and maintains electrical connection.

[0015] In some embodiments, rotating slots are respectively provided on the inner walls of opposite sides of the second housing, and the two ends of the rotating shaft are respectively rotatably embedded in the rotating slots.

[0016] In some embodiments, a guide groove is provided on one side of the rotating slot, the opening of the guide groove is configured as an flared opening, and the guide groove is disposed between the edge of the second housing and the rotating slot.

[0017] In some embodiments, the reset button includes:

[0018] A pressure block is movably disposed within the guide groove, and the pressure block is matched and blocked on one side of the first lever arm;

[0019] A reset rod is connected to the pressure block, and the reset rod passes through a limiting hole opened on the second housing.

[0020] In some embodiments, a limiting groove is formed on the edge of the second housing, and the opening of the limiting groove is blocked by the first housing to form the limiting hole.

[0021] In some embodiments, grease is provided between the pressure block and the guide groove and / or between the reset rod and the limiting hole.

[0022] In some embodiments, the pressure block is configured as an I-shaped component.

[0023] In some embodiments, the terminal block overload protector further includes:

[0024] The second terminal is disposed on the second housing;

[0025] An extension piece is disposed within the second terminal block and maintains electrical connection.

[0026] The embodiments of this application have at least the following beneficial effects:

[0027] The terminal block type overload protector provided in this application includes a snap-fit ​​first housing and a second housing, a first contact piece, a bimetallic strip, a first terminal block, a second contact piece, a rotating lever, and a reset button. The first contact piece and the connected bimetallic strip are disposed on the first housing, and the first terminal block, the second contact piece, the rotating lever, and the second contact piece of the reset button are correspondingly disposed on the second housing. The above-mentioned parts are divided into two groups and respectively installed on the first housing and the second housing. Thus, the entire installation process can be completed by snapping the first housing and the second housing. During the process, the parts do not need to cooperate with the two housings, which simplifies the assembly operation to a certain extent, reduces the assembly difficulty, makes it easier to achieve automated assembly, and helps to improve assembly efficiency. Attached Figure Description

[0028] 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.

[0029] Figure 1 An exploded view of a terminal block overload protector according to an embodiment of this application is shown;

[0030] Figure 2 It shows Figure 1 A schematic diagram of the first angle of the terminal block type overload protector;

[0031] Figure 3 It shows Figure 1 A second-angle schematic diagram of a terminal block type overload protector;

[0032] Figure 4 It shows Figure 1 A schematic diagram of the third angle of the terminal block type overload protector;

[0033] Figure 5 It shows Figure 1 A schematic diagram of the fourth angle of the terminal block type overload protector;

[0034] Figure 6 It shows Figure 1 A schematic diagram of the internal structure of a terminal block type overload protector;

[0035] Figure 7 It shows Figure 1 A cross-sectional view of the closed-state terminal block overload protector in the middle;

[0036] Figure 8 It shows Figure 1 A cross-sectional view of the disconnected state of the terminal block overload protector.

[0037] Figure label:

[0038] 1-First housing, 11-First insert groove, 12-Blocking tongue;

[0039] 2-Second housing, 21-Second insertion groove, 211-Wire insertion hole, 22-Guide groove, 23-Rotating slot, 231-Guide groove, 24-Limiting hole, 241-Limiting groove, 25-Groove cover, 251-Stop flange;

[0040] 3-First contact plate;

[0041] 4-Bimetallic strip, 41-Fixed end, 42-Electrical connection end, 421-Extension arm, 43-Swing end, 44-Window;

[0042] 5 - First terminal block, 51 - Screw;

[0043] 6-Second contact plate;

[0044] 7- Rotating lever, 71- Rotating shaft, 72- First lever arm, 73- Second lever arm;

[0045] 8-Reset button, 81-Pressure block, 82-Reset lever;

[0046] 9-Second terminal block, 91-Extension piece. Detailed Implementation

[0047] 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.

[0048] 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.

[0049] This application is described below with reference to the accompanying drawings and specific embodiments:

[0050] See Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 This application provides a terminal block type overload protector for connection to various electrical devices; it utilizes the characteristic of a bimetallic strip composed of heat-sensitive material deforming under overload heat accumulation to disconnect the circuit within the electrical device, thereby achieving overload protection.

[0051] The terminal block type overload protector includes: a first housing 1, a second housing 2, a first contact 3, a bimetallic strip 4, a first terminal block 5, a second contact 6, a rotating lever 7, and a reset button 8; the first contact 3 and the bimetallic strip 4 are mounted on the first housing 1, and the first terminal block 5, the second contact 6, the rotating lever 7, and the reset button 8 are correspondingly mounted on the second housing 2. The first housing 1 and the second housing 2 are fastened together to encapsulate the above components.

[0052] The first housing 1 and the second housing 2 serve as the mounting base for the terminal block overload protector and can be fastened together to form a complete support structure.

[0053] The first housing 1 has a first insertion groove 11, and the first contact 3 is embedded in the first insertion groove 11. The first insertion groove 11 can be recessed and is formed on the inner surface of the first housing 1, and the opening of the first insertion groove 11 is formed on one side edge of the first housing 1. The first contact 3 can be inserted into the first insertion groove 11 from one side of the first housing 1 to complete the installation of the first contact 3. The first contact 3 is a wiring part for matching and connecting external circuits.

[0054] The bimetallic strip 4 is conductive and composed of at least two conductive materials with different coefficients of thermal expansion. Under overload and heat accumulation, it can deform to varying degrees, thereby interacting to guide the bimetallic strip 4 to undergo overall deformation and displacement, breaking the local connection and achieving a circuit break. The bimetallic strip 4 may include a fixed end 41, an electrical connection end 42, and a swing end 43. The fixed end 41 can be fixed to the first contact 3 by riveting or welding, and serves as one electrical connection end of the bimetallic strip 4, maintaining electrical connection with the first contact 3. The swing end 43 represents the portion of the bimetallic strip 4 that undergoes significant displacement due to thermal deformation; the accumulated deformation is manifested at the swing end 43, and it can also be reset under external force. The electrical connection end 42 is the other electrical connection end of the bimetallic strip 4, used to electrically connect to the second contact 6. When the swing end 43 undergoes overload deformation and displacement, it can synchronously pull the electrical connection end 42 to displace, thereby breaking the electrical connection with the second contact 6.

[0055] Generally, the bimetallic strip 4 is an arc-shaped sheet, and the swing end 43 is bent to one side. A window 44 is provided in the middle of the bimetallic strip 4. The electrical connection end 42 includes an extension arm 421, one end of which is connected to the inside of the window 44, and the other end is a free end, serving as the electrical connection part with the second contact piece 6. The free end protrudes from the window 44, and the free end and the swing end 43 are located on opposite sides of the window 44. When the swing end 43 deforms due to heat and shifts to the other side of the bimetallic strip 4, the extension arm 421 will also swing to the other side of the bimetallic strip 4, eventually shifting to the other side of the bimetallic strip 4, stably disconnecting the electrical connection with the second contact piece 6.

[0056] The second housing 2 is provided with a second insertion slot 21, and the first terminal 5 is disposed in the second insertion slot 21. The first terminal 5 is used to connect other circuits externally, and the second contact 6 is electrically connected to the first terminal 5. The initial position of the extension arm 421 can be set to the position connected to the second contact 6. When the bimetallic strip 4 is overloaded and deformed, the extension arm 421 shifts and disconnects the electrical connection with the second contact 6.

[0057] The rotating lever 7 and the reset button 8 are mounted on the second housing 2 to form a reset mechanism. By operating the reset button 8, the rotating lever 7 is driven to rotate, thereby driving the swing end 43 to reset and simultaneously guiding the extension arm 421 to reset, re-establishing the contact electrical connection with the second contact piece 6.

[0058] The rotating lever 7 includes a rotating shaft 71, a first lever arm 72, and a second lever arm 73. The two ends of the rotating shaft 71 are rotatably disposed within the second housing 2. The first lever arm 72 and the second lever arm 73 are spaced apart circumferentially on the rotating shaft 71. The first lever arm 72 is positioned to block one side of the swing end 43, and the second lever arm 73 is positioned to block one side of the reset button 8. Therefore, by pressing the reset button 8, the second lever arm 73 is pushed, thereby driving the rotating shaft 71 to rotate and causing the first lever arm 72 to drive the swing end 43 to reset. Conversely, when the swing end 43 deforms and shifts, it pushes the first lever arm 72 and the second lever arm 73 to rotate, thereby pushing the reset button 8 to shift.

[0059] The reset button 8 is slidably embedded in the guide groove 22 opened on the second housing 2, so as to stably cooperate with the second lever 73.

[0060] During assembly, the first contact 3 and the connected bimetallic strip 4 can be inserted into the first insertion slot 11 on the first housing 1; the first terminal 5 is embedded in the second insertion slot 21, and the second contact 6 is installed on the second housing 2 and electrically connected to the first terminal 5. The rotating lever 7 and the reset button 8 are correspondingly installed on the second housing 2; then the first housing 1 and the second housing 2 are fastened together, thereby encapsulating the above components inside the housing and completing the installation. It is worth noting that in the entire process, the first housing 1 and the second housing 2 are used as the installation bases to install some components, and then the two housings are fastened together. It is not necessary for the two housings to be installed to a certain component at the same time, which can greatly reduce the assembly difficulty, is suitable for automated production, and helps to improve assembly efficiency.

[0061] In some embodiments, considering that the bimetallic strip 4 will deform and shift to a certain extent when overloaded, it needs to maintain a certain distance from the surrounding structure to allow for movement space; however, due to the small overall size requirement of the overload protector, it is necessary to strictly control the mating distance of each component, which is extremely difficult. Furthermore, precise operation is required during installation, often requiring manual parameters, resulting in unsatisfactory overall assembly efficiency.

[0062] To address this, the installation position and orientation of the bimetallic strip 4 can be configured to reduce the risk of interference with surrounding structures, thereby simplifying assembly. Specifically, the swing direction of the swing end 43 of the bimetallic strip 4 and the displacement direction of the electrical connection end 42 are set along the fastening direction of the first housing 1 and the second housing 2. Other components, such as the second contact piece 6, are located on the second housing 2, not on the first housing 1. Therefore, when assembling the bimetallic strip 4, it is not necessary to coordinate with both the first housing 1 and the second housing 2; only the first housing 1 needs to be coordinated, significantly reducing assembly difficulty.

[0063] In some embodiments, a wire insertion hole 211 is provided on the side wall of the second insertion slot 21, the second contact piece 6 is inserted into the wire insertion hole 211, and a portion of the second contact piece 6 is located in the first terminal 5 and maintains electrical connection.

[0064] In other words, the second contact piece 6 is inserted into the second insertion slot 21, and can be fastened by the screw 51 to the second contact piece 6, the first terminal 5, and other conductive parts of the external circuit, such as wires and copper sheets.

[0065] The insertion hole 211 is configured to match the specifications and shape of the second contact piece 6, so as to lock and fix the second contact piece 6.

[0066] In some embodiments, rotating slots 23 are respectively provided on the inner walls of opposite sides of the second housing 2, and the two ends of the rotating shaft are respectively rotatably embedded in the rotating slots 23, thereby restricting the position of the rotating shaft 71 radially and axially.

[0067] In some embodiments, for ease of assembly, a guide groove 231 is provided on one side of the rotating slot 23. The opening of the guide groove 231 is flared, and the guide groove 231 is located between the edge of the second housing 2 and the rotating slot 23. During assembly, the end of the rotating shaft 71 can be directly pushed into the guide groove 231 and finally positioned within the rotating slot 23.

[0068] Generally, the inner diameter of the bottom area of ​​the rotating slot 23 is slightly larger than the end diameter of the rotating shaft 71, so that it can be stably rotated and embedded in the bottom of the rotating slot 23.

[0069] The guide groove 231 can be set as part of the rotating slot 23, and its width is greater than the diameter of the rotating shaft 71 to facilitate pushing in. Of course, the width and gradually decreasing diameter of the guide groove 231 facilitate the stable movement and stable positioning of the rotating shaft 71.

[0070] Correspondingly, the opening of the guide groove 231 can be correspondingly opened on the edge of the second housing 2. Specifically, the opening of the guide groove 231 is opened on the side edge of the second housing 2 facing the first housing 1, so that it can be closed by the first housing 1 in the assembled state.

[0071] In some embodiments, the reset button 8 may include a pressure block 81 and a reset rod 82; the pressure block 81 is movably disposed in the guide groove 22 and is matched and blocked on one side of the second lever 73; the reset rod 82 is connected to the pressure block 81 and passes through the limiting hole 24 opened on the second housing 2.

[0072] In other words, the pressure block 81 cooperates with the second lever arm 73. By pressing the reset rod 82, the pressure block 81 drives the second lever arm 73 to rotate, thereby causing the first lever arm 72 to push the swing end 43 to reset. When the bimetallic strip 4 is overloaded, the swing end 43 pushes the first lever arm 72, causing the second lever arm 73 to push the pressure block 81 to reset.

[0073] In some embodiments, the limiting hole 24 adopts a semi-closed structure, that is, the edge of the second housing 2 is provided with a limiting groove 241, and the opening of the limiting groove 241 is blocked by the first housing 1 to form the limiting hole 24.

[0074] Therefore, during assembly, the reset rod 82 can be directly inserted into the limiting groove 241 and then sealed by the first housing 1, making the operation simple and efficient.

[0075] In some embodiments, the bottom specification of the limiting groove 241 is adapted to the specification of the reset rod 82, and the opening of the limiting groove 241 is set in an flared shape, gradually narrowing from the outside to the inside, thereby facilitating installation. Correspondingly, a stop tongue 12 may also be provided on the first housing 1, the shape of which is adapted to the shape of the limiting groove 241, thereby strictly sealing the reset rod 82.

[0076] In some embodiments, in order to reduce sliding friction, grease is provided between the pressure block 81 and the guide groove 22 and / or between the reset rod 82 and the limiting hole 24.

[0077] It is worth noting that the grease itself has a certain viscosity, which can maintain the position of the reset rod 82 or the pressure block 81, prevent them from vibrating, shaking, or shifting, thereby reducing noise.

[0078] In some embodiments, the pressure block 81 is configured as an I-shaped part, which facilitates maintaining the shape of the injection molding and, more importantly, can accommodate a certain amount of grease, thereby maintaining a stable lubrication effect.

[0079] In some implementations, the terminal block overload protector further includes a second terminal 9 for connecting the neutral wire or the ground wire, and the corresponding first terminal 5 for connecting the live wire.

[0080] The second terminal 9 is disposed on the second housing 2.

[0081] In some embodiments, in order to cope with the installation conditions of certain devices, an extension piece 91 can be extended inside the second terminal 9 and kept electrically connected to the second terminal 9. Other circuit structures in the device can be connected through the extension piece 91 to meet the need for extended electrical connection.

[0082] In some embodiments, the second insertion slot 21 may be configured as an open slot to facilitate the installation of the first terminal 5. For this purpose, a slot cover 25 may also be configured, and a screw 51 adapted to the first terminal 5 may be rotatably disposed on the slot cover 25.

[0083] The groove cover 25 is also provided with a stop flange 251, which is positioned on one side of the axial end of the screw 51 to prevent the screw 51 from coming off.

[0084] The embodiments of this application have at least the following beneficial effects:

[0085] The terminal block type overload protector provided in this application includes a snap-fit ​​first housing and a second housing, a first contact piece, a bimetallic strip, a first terminal block, a second contact piece, a rotating lever, and a reset button. The first contact piece and the connected bimetallic strip are disposed on the first housing, and the first terminal block, the second contact piece, the rotating lever, and the second contact piece of the reset button are correspondingly disposed on the second housing. The above-mentioned parts are divided into two groups and respectively installed on the first housing and the second housing. Thus, the entire installation process can be completed by snapping the first housing and the second housing. During the process, the parts do not need to cooperate with the two housings, which simplifies the assembly operation to a certain extent, reduces the assembly difficulty, makes it easier to achieve automated assembly, and helps to improve assembly efficiency.

[0086] 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.

[0087] 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.

[0088] 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 each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0089] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0090] Furthermore, the use of terms such as "first" and "second" in this application is 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. Therefore, features defined with "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0091] 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.

[0092] 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.

[0093] 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. A terminal post overload protector characterized by, include: The first housing and the second housing are fastened together. The first housing has a first insertion groove, and the second housing has a second insertion groove and a guide groove. The first contact piece is inserted into the first insertion slot; A bimetallic strip has a fixed end, an electrical connection end, and a swing end. The fixed end is connected to the first contact piece, and the swing end has a first swing position and a second swing position, so that when the bimetallic strip is overloaded and deformed by heat accumulation, the swing end will swing from the first position to the second position and guide the electrical connection end to move. The first terminal is inserted into the second insertion slot; The second contact is connected to the terminal block, and the second contact is electrically connected to the electrical connection terminal in a closable manner. A rotating lever includes a rotating shaft, a first lever arm, and a second lever arm. The rotating shaft is rotatably connected to the second housing. The first lever arm and the second lever arm are circumferentially spaced on the rotating shaft, and the first lever arm is positioned on one side of the swing end to push the swing end to move or reset under the push of the swing end. A reset button is movably disposed within the guide groove, and the reset button is positioned on one side of the second lever arm to push the second lever arm to rotate or to reset under the push of the second lever arm.

2. The post-type overload protector of claim 1, wherein The insertion direction of the first terminal, the swing direction of the swing end, and the displacement direction of the electrical connection end are roughly set along the fastening direction of the first housing and the second housing.

3. The post-type overload protector of claim 1, wherein The second insertion slot has a wire insertion hole on its side wall. The second contact piece is inserted into the wire insertion hole, and a portion of the second contact piece is located in the first terminal block and maintains electrical connection.

4. The post-type overload protector of claim 1, wherein Rotating slots are respectively provided on the inner walls of opposite sides of the second housing, and the two ends of the rotating shaft are respectively rotatably embedded in the rotating slots.

5. The post-type overload protector of claim 4, wherein A guide groove is provided on one side of the rotating slot. The opening of the guide groove is set in a flared shape, and the guide groove is located between the edge of the second housing and the rotating slot.

6. The post-type overload protector of claim 1, wherein The reset button includes: A pressure block is movably disposed within the guide groove, and the pressure block is matched and blocked on one side of the first lever arm; A reset rod is connected to the pressure block, and the reset rod passes through a limiting hole opened on the second housing.

7. The post-type overload protector of claim 6, wherein The edge of the second housing has a limiting groove, and the opening of the limiting groove is blocked by the first housing to form the limiting hole.

8. The terminal block type overload protector as described in claim 6, characterized in that, Lubricating grease is provided between the pressure block and the guide groove and / or between the reset rod and the limiting hole.

9. The terminal block type overload protector as described in claim 8, characterized in that, The pressure block is configured as an I-shaped component.

10. The terminal block type overload protector as described in claim 1, characterized in that, The terminal block type overload protector also includes: The second terminal is disposed on the second housing; An extension piece is disposed within the second terminal block and maintains electrical connection.

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