Wiring terminal
By designing terminals with the same plug-in direction as the locking direction, using the matching structure of the block and the terminal board and the torsion spring mechanism, the problems of operation difficulty and space occupancy when connecting large current specifications are solved, achieving the effect of small operation difficulty, small space and good heat dissipation.
Patent Information
- Application Number
- CN202422142928.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-06-10
- Estimated Expiration
- 2034-09-02
AI Technical Summary
When designing existing terminals is used for wire connections with high current specifications, it is necessary to increase the stiffness and operating force of the spring blade, which leads to increased operational difficulty and takes up a large space, making it not suitable for miniaturized communication cabinets.
A terminal with a wiring direction consistent with the locking direction is designed, and a matching structure of the press block and the wiring board is adopted. The press block is driven to rotate through screws to form a wiring gap to tighten the wire, and the plug-in and disassembly are facilitated through the torsion spring mechanism.
It realizes the effect of low operation difficulty and small space when connecting wires of different current specifications. It also has good heat dissipation performance and meets the space requirements of the communication cabinet.
Smart Images
Figure CN222966040U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of electrical equipment, and particularly relates to a terminal. Background Art
[0002] In order to connect the main circuit and the external circuit, a circuit breaker is generally provided with terminals for connecting to external wires. The insertion direction of the wire is perpendicular to the force application direction of the terminal. Since the terminal moves in the vertical direction in this way, it occupies a large height space and is not suitable for the circuit breakers in the increasingly miniaturized communication cabinets. Therefore, non-threaded terminals are commonly used for wiring the components in the communication cabinet. One of the existing solutions is to use a spring plate connection when making electrical connections with a small current specification. The terminal usually relies only on the clamping force provided by the spring plate to ensure the reliability of the wiring. However, when the spring plate wiring method is used for connecting wires with a large current specification, as the load current increases and the cross-sectional area of the wire increases, the clamping force required from the spring plate also continuously increases, resulting in a continuous increase in the stiffness required for the spring plate, and thus a very large operating force is required, increasing the operation difficulty. Content of the Utility Model
[0003] To solve the above problems, the purpose of the utility model is to provide a terminal with the same insertion direction and locking direction, small occupied space, meeting the space requirements of the communication cabinet, capable of being used for wires with different current specifications and having low operation difficulty.
[0004] The purpose of the utility model is achieved through the following technical solutions:
[0005] A terminal includes a wiring frame having an input end and an output end, a pressing block, a wiring board, a nut, and a screw. The pressing block is rotatably installed in the wiring frame; the wiring board extends into the interior of the wiring frame from the output end of the wiring frame and is fixedly connected to the inner wall of the wiring frame, and a wiring gap for pressing the wire is formed between the wiring board and the pressing block; the nut is installed on the wiring frame and is located on one side of the input end of the wiring frame; the screw extends into the wiring frame from one side of the input end of the wiring frame and is threadedly connected to the nut. The screw can extend into the wiring frame to push the pressing block to rotate towards the wiring board, so that the external wire entering the wiring gap from the input end of the wiring frame is pressed under the cooperation of the pressing block and the wiring board.
[0006] Further, in order to install the nut and prevent the nut from rotating, a square hole is provided on one side of the input end of the wiring frame, and a U-shaped groove is provided on the other side; correspondingly, the two sides of the nut are provided with a first flange and a second flange respectively for cooperating with the square hole and the U-shaped groove on the wiring frame.
[0007] Further, in order to improve the stability of the nut after installation, a square groove is provided at the top of the input end of the wiring frame for cooperation; correspondingly, a third flange for cooperating with the square groove above the wiring frame is provided on the upper side of the nut.
[0008] Furthermore, to prevent the external wire from extending out of the output end of the wiring frame and to prevent it from extending too far into the circuit breaker and affecting other electrical components inside the circuit breaker, a wire blocking rib that blocks the wiring gap is fixed on one side of the output end of the wiring frame.
[0009] Furthermore, the pressing block is rotatably installed in the wiring frame through a rotating shaft, and the rotating shaft is located between the wiring board and the screw.
[0010] Furthermore, to facilitate the insertion of the external wire into the wiring gap during wiring and also to facilitate the pulling out of the external wire during maintenance, a torsion spring is sleeved on the rotating shaft. One torsion arm of the torsion spring is stuck on the wiring frame, and the other torsion arm is stuck on the pressing block; when the screw pushes the pressing block to rotate towards the wiring board, the torsion spring deforms (stores energy), and the wiring gap becomes smaller; when the screw is separated from the pressing block, the torsion spring recovers (releases energy) and drives the pressing block to rotate away from the wiring board, and the wiring gap becomes larger.
[0011] Furthermore, during the process of the screw pushing the pressing block to rotate towards the wiring board, the contact part between the screw and the pressing block is always located between the screw and the rotating shaft to ensure the continuous pressure of the pressing block on the external wire.
[0012] Furthermore, the side of the pressing block facing the wiring board is an arc surface, and the arc surface protrudes towards the wiring board and is provided with a plurality of tooth-shaped structures thereon.
[0013] As a structure of this embodiment, the pressing block is an integral structure.
[0014] As another structure of this embodiment, the pressing block is a laminated structure formed by riveting multiple sheets of plates.
[0015] The utility model has a compact structure, simple installation, stable and reliable operation, the same direction for wire insertion and locking, small occupied space, meeting the space requirements of the communication cabinet, and at the same time can be used for wires with different current specifications, with strong stiffness, large clamping force, small operation difficulty, and in addition, it also has excellent heat dissipation performance. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] The following further details the structure of the utility model with reference to the drawings.
[0017] Figure 1 It is an exploded view of the terminal of the utility model.
[0018] Figure 2 It is a cross-sectional view of the terminal of the utility model in the pre-wiring state.
[0019] Figure 3 It is a cross-sectional view of the terminal of the utility model in the locked state.
[0020] Figure 4 These are schematic structural diagrams of the wiring frame of the present utility model from two different perspectives.
[0021] Figure 5 This is a schematic structural diagram of the nut of the present utility model.
[0022] Figure 6 This is a schematic structural diagram of the pressing block of the present utility model.
[0023] As shown in the figure: 1 - nut, 11 - first flange, 12 - second flange, 13 - threaded hole, 14 - third flange, 2 - screw, 3 - wiring frame, 31 - square hole, 32 - square groove, 33 - U-shaped groove, 34 - wire blocking rib, 4 - pressing block, 41 - tooth-shaped structure, 42 - shaft hole, 5 - wiring board, 6 - rotating shaft. Specific embodiments
[0024] The following specific embodiments illustrate the implementation manners of the present utility model. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The described embodiments are only a part of the embodiments of the present utility model, rather than all of them. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.
[0025] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in the art to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model. Therefore, they do not have technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present utility model can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle", etc. cited in this specification are only for convenience of description and are not used to limit the scope for the implementation of the present utility model. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope in which the present utility model can be implemented.
[0026] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. It should be noted that the terms "comprising", "including" or any other variant is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such process, method, article or device. Embodiment 1
[0027] As Figures 1-3 shown, this embodiment provides a terminal block, which includes a wiring frame 3, a pressing block 4, a wiring board 5, a rotating shaft 6, a nut 1, and a screw 2.
[0028] As Figure 4 shown, the wiring frame 3 is a square frame body, which has two openings penetrating through the front and back. One of the openings serves as the input end, and the other opening serves as the output end. On one side of the input end of the wiring frame 3, a square hole 31 is provided, and on the other side, a U-shaped groove 33 is provided; on the top of the input end of the wiring frame 3, a square groove 32 is provided.
[0029] The pressing block 4 is rotatably installed in the wiring frame 3 through the rotating shaft 6. The rotating shaft 6 is installed in the wiring frame 3 and is located between the wiring board 5 and the screw 2. The pressing block 4 is similar in shape to a triangle and is arranged on the upper side inside the wiring frame 3. The pressing block is an integral structure. One of the corners of the pressing block 4 is sleeved on the rotating shaft 6 through a preset shaft hole 42 thereon. Another corner is located above the rotating shaft 6, and the third corner is located below and can move up and down (close to or away from the wiring board 5) as the pressing block 4 rotates. The side of the pressing block 4 facing the wiring board 5 is an arc surface, and this arc surface protrudes towards the wiring board 5 and is provided with a plurality of tooth-shaped structures 41 thereon. When the pressing block 4 presses the external wire, the distance between the lower end of the pressing block 4 and the wiring board 5 is greater than the minimum distance between the pressing block 4 and the wiring board 5 (i.e., greater than the minimum value of the wiring gap).
[0030] One end of the wiring board 5 is located inside the circuit breaker, and the other end extends into the wiring frame 3 from the output end of the wiring frame 3 and is fixedly connected to the inner wall of the wiring frame 3. A wiring gap for pressing the external wire is formed between the wiring board 5 and the pressing block 4 (lower end), and the size of the wiring gap changes continuously as the pressing block 4 rotates.
[0031] As Figure 5As shown, the nut 1 is installed on the wiring frame 3 and is located at the upper part on the input side of the wiring frame 3. The nut 1 has a special-shaped structure with a threaded hole 13 in the middle. On both sides of the nut 1, there are a first flange 11 and a second flange 12 that are respectively in one-to-one fit with the square hole 31 and the U-shaped groove 33 on the wiring frame 3. There is also a third flange 14 provided on the upper side of the nut 1. The first flange 11 is clamped in the square hole 31 on the wiring frame 3, the second flange 12 is clamped in the U-shaped groove 33 on the wiring frame 3, and the third flange 14 is clamped in the square groove 32 on the wiring frame 3. Through the settings of the square hole 31, the square groove 32, the U-shaped groove 33, the first flange 11, the second flange 12, and the third flange 13, the nut 1 can be stably installed on the wiring frame 3 to prevent it from rotating.
[0032] The screw 2 extends into the wiring frame 3 from one side of the input end of the wiring frame 3 and is threadedly connected to the nut 1. The screw 1 can extend into the wiring frame 3 to push the pressing block 4 to rotate towards the wiring board 5, so that the external wire entering the wiring gap from the input end of the wiring frame 3 is pressed tightly under the cooperation of the pressing block 4 and the wiring board 5. During the process of the screw 2 pushing the pressing block 4 to rotate towards the wiring board 5, the contact part between the screw 2 and the pressing block 4 is always located between the screw 2 and the rotating shaft 6 to ensure the continuous pressure of the pressing block 4 on the external wire, and thus continuously press the external wire tightly.
[0033] When wiring, first, when the screw 2 is unscrewed from the wiring frame 3, the pressing block 4 rotates around the rotating shaft 6 and lifts. At this time, the wiring gap between the pressing block 4 and the wiring board 5 is the largest, and it is in the Figure 2 pre-wiring state as shown. At this time, the external wire can be inserted into the wiring gap inside the wiring frame 3 from the input end of the wiring frame 3. After the external wire is inserted, turn the screw 2 and continuously screw it into the nut 1. After the end of the screw 2 contacts the pressing block 4, continue to screw in the screw 2. As the screw 2 goes deeper, the screw 2 will push the pressing block 4 to rotate around the rotating shaft 6 towards the wiring board 5, so that the lower end of the pressing block 4 moves down and presses the external wire tightly, and it is in the Figure 3 locking state as shown. When the screw 2 is locked, the locking torque is transmitted to the wiring frame 3 to complete the wiring. Embodiment 2
[0034] To prevent the external wire from protruding from the output end of the wiring frame 3 and to prevent it from extending too deeply into the circuit breaker and affecting other electrical components inside the circuit breaker, the following settings are added in this embodiment on the basis of Embodiment 1:
[0035] A wire blocking rib 34 that blocks the wiring gap (external wire) is fixed on one side of the output end of the wiring frame 3. Embodiment 3
[0036] When a circuit breaker fails (such as a smart circuit breaker circuit failure) or in other cases where it is necessary to remove the circuit breaker for maintenance, it is necessary to first remove the external wire from the circuit breaker. However, due to the special structure of the pressure block 4, and when the pressure block 4 presses the external wire, the distance between its lower end and the wiring board 5 is greater than the minimum distance between the pressure block 4 and the wiring board 5. Therefore, when the screw 2 is loosened and the external wire is pulled outwards, the lower end of the pressure block 4 will still rotate in the direction of the pulled-out external wire under the pull of the external wire. The rotation of the pressure block 4 makes the wiring gap between it and the wiring board 5 smaller, and instead presses the external wire tightly, affecting the pulling out of the external wire. To solve this problem, facilitate the insertion of the external wire into the wiring gap during wiring, and at the same time facilitate the pulling out of the external wire during maintenance, the following settings are added to this embodiment on the basis of Embodiment 2:
[0037] A torsion spring is sleeved on the rotating shaft 6. One torsion arm of the torsion spring is stuck on the wiring frame 3, and the other torsion arm is stuck on the pressure block 4; when the screw 2 pushes the pressure block 4 to rotate towards the wiring board 5, the torsion spring deforms (stores energy), the wiring gap becomes smaller, and the external wire is pressed tightly; when the screw 2 is separated from the pressure block 4, the torsion spring recovers (releases energy) and under the action of its elastic force, the torsion spring drives the pressure block 4 to rotate away from the wiring board 5, the wiring gap becomes larger, and the pressure block 4 is lifted, so that the external wire can be easily pulled out or connected. Embodiment 4
[0038] The difference between this embodiment and any one of Embodiments 1-3 is that:
[0039] The pressure block 4 is a laminated structure formed by riveting multiple metal plates. The cross-section of the lower end (towards the wiring board) of each plate is V-shaped, and the plates are made of a metal material with a certain elasticity. After the pressure block 4 is set in the above structure, when the pressure block 4 applies pressure to the external wire, the adjacent two plates at the lower end of the pressure block 4 will open a certain gap under the action of the pressure. After this gap acts on the external wire, the plates on both sides of the gap will apply a lateral clamping force to the external wire. The clamping force and the vertical pressure applied by the pressure block 4 to the external wire act together to ensure the tight pressing of the external wire and prevent loosening. At the same time, the existence of the gap can also promote the flow of air, which is beneficial to the heat dissipation of the pressure block 4.
[0040] Other details not elaborated in this utility model are conventional techniques well known to those skilled in the art.
[0041] It should be noted that the term "including", "comprising" or any other variant is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or also includes elements inherent to this process, method, article or device.
[0042] The protection scope of the present utility model is not limited to the technical solutions disclosed in the specific embodiments. Any modifications, equivalent substitutions, improvements, etc. made to the above embodiments based on the technical essence of the present utility model shall fall within the protection scope of the present utility model.
Claims
1. A terminal block, comprising a terminal frame having an input terminal and an output terminal, a pressing block, a terminal board, a nut and a screw, characterized in that: The pressing block is rotatably installed in the wiring frame; the wiring board extends from the output end of the wiring frame into the interior of the wiring frame and is fixedly connected to the inner wall of the wiring frame, and a wiring gap for clamping the external wire is formed between the wiring board and the pressing block; the nut is installed on the wiring frame and is located on one side of the input end of the wiring frame; the screw extends from one side of the input end of the wiring frame into the wiring frame and is threadedly connected in the nut, and the screw can extend into the wiring frame to push the pressing block to rotate toward the wiring board, so that the external wire entering the wiring gap from the input end of the wiring frame is clamped under the cooperation of the pressing block and the wiring board; a square hole is provided on one side of the input end of the wiring frame, and a U-shaped groove is provided on the other side; correspondingly, flanges 1 and 2 are provided on both sides of the nut to respectively cooperate with the square hole and the U-shaped groove on the wiring frame.
2. The terminal block according to claim 1, characterized in that: A square groove is provided on the top of the input end of the wiring frame; correspondingly, a flange three is provided on the upper side of the nut to cooperate with the groove on the upper side of the wiring frame.
3. The terminal block according to claim 1, characterized in that: A wire blocking rib for blocking the wiring gap is fixed on one side of the output end of the wiring frame.
4. The terminal block according to claim 1, characterized in that: The pressing block is rotatably installed in the wiring frame through a rotating shaft, and the rotating shaft is located between the wiring board and the screw.
5. The connection terminal according to claim 4, characterized in that: A torsion spring is sleeved on the rotating shaft, one torsion arm of the torsion spring is clamped on the wiring frame, and the other torsion arm is clamped on the pressure block; when the screw pushes the pressure block to rotate toward the wiring board, the torsion spring is deformed and the wiring gap becomes smaller; when the screw is out of contact with the pressure block, the torsion spring recovers and drives the pressure block to rotate toward the direction away from the wiring board, and the wiring gap becomes larger.
6. The connection terminal according to claim 4, characterized in that: When the screw pushes the pressing block to rotate toward the direction close to the wiring board, the contact portion between the screw and the pressing block is always located between the screw and the rotating shaft.
7. The connection terminal according to claim 1, characterized in that: The side of the pressing block facing the wiring board is an arc-shaped surface, and the arc-shaped surface protrudes toward the wiring board and is provided with a plurality of tooth-shaped structures.
8. The connecting terminal according to any one of claims 1 to 7, characterized in that: The pressing block is an integrated structure.
9. The connecting terminal according to any one of claims 1 to 7, characterized in that: The pressing block is a laminated structure formed by riveting multiple plates.