A positionable screw terminal and its connecting device

Abstract

This utility model relates to the field of terminal block technology and discloses a positionable screw terminal, including a wiring portion and a conductive plate fixed to the lower side of one end of the wiring portion. A copper post is installed through one end of the conductive plate, and a fastening component is embedded in the front side of the wiring portion. A positionable screw terminal connection device includes a rubber plate and a circuit board, which are connected by the positionable screw terminal. This utility model overcomes the problems of inaccurate positioning, misalignment, jamming, and slippage when installing screw terminals on circuit boards by assembling guide chamfers, assembling positioning steps, and interference straight hobbing teeth for installation. The pressure plate in the fastening component squeezes the wire inside the wiring portion, making the wire more securely fixed without deforming the wiring portion. When inspecting or replacing the wire, there is no need to replace the screw terminal. The positioning hook and positioning step make the installation of the screw terminal to the rubber plate and circuit board simpler and more secure.

Description

Technical Field

[0001] This utility model relates to the field of terminal block technology, specifically a positionable screw terminal and its connecting device. Background Technology

[0002] The main purpose of screw terminals in PCB boards is to ensure the stability and reliability of electrical connections. By using screw terminals, users can quickly connect or disconnect wires without soldering. Screw terminals are widely used in various applications requiring stable electrical connections, especially in industrial control equipment, power distribution systems, communication base stations, and smart home control systems. Due to their reliability and ease of maintenance, screw terminals perform excellently in these fields.

[0003] Existing screw terminal structures mainly consist of a flat nut and a copper component pressed together. The flat nut in this structure allows for in-mold positioning and in-mold riveting, avoiding the risk of nut rotation. The riveting process creates a reverse-locking position, effectively preventing the nut from falling off. Current is transmitted to the PCB board through the copper component; the nut only serves as support and increases the number of thread turns, enhancing locking strength. However, due to material thickness limitations, the chamfer depth of the terminal assembly guide cannot be made deep. This results in a shallow chamfer during screw installation, making it difficult for the operator to align the screws.

[0004] For example, a Chinese patent discloses an adapter screw end for introducing a large current from a conductive lead into a PCB board (authorization announcement number CN209804937U). This patented technology can be connected to a wire through a wiring hole; the conductive terminal is provided with a positioning hole for fixing to sheet metal or mounting housing; and then the high current nut is fixed to the PCB board with screws, thereby realizing a stable connection for introducing a large current to the PCB board. However, it also has the problem of misalignment. Utility Model Content

[0005] The purpose of this invention is to provide a positionable screw terminal and its connecting device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A positionable screw terminal includes a wiring portion and a conductive plate fixed to the lower side of one end of the wiring portion. A positioning hole is formed on the inner side of the conductive plate near the wiring portion, and an assembly hole is formed on the inner side of the conductive plate away from the wiring portion and a copper post is fixedly connected thereto. The copper post includes a positioning flat part, an interference straight hob tooth fixedly connected to the positioning flat part, and an external thread fixedly connected to the interference straight hob tooth.

[0008] Furthermore, an assembly positioning step is provided on the upper outer side of the interference straight hob, and an assembly guide chamfer is provided on the upper outer side of the assembly positioning step. The outer diameter of the interference straight hob is larger than the outer diameter of the assembly hole, and the interference straight hob and the assembly hole are fixedly connected by an interference fit, or they can be connected by an integral molding method.

[0009] Furthermore, a relief groove is provided on the outer side of the external thread near the interference straight hob.

[0010] Furthermore, the wiring part is a hollow cylindrical structure, and a deformation opening is provided on the wiring part, through which the wiring part can be pressed tightly.

[0011] Furthermore, the inner wall of the wiring part is provided with a wire pressing groove. The wire pressing groove can be opened on the inner wall of the wiring part or on the inner wall side corresponding to the fastening component.

[0012] Furthermore, the wiring part is provided with a fastening assembly, which includes a pressure plate, a guide sleeve provided on the outside of the pressure plate, and a slot provided on the inside of the pressure plate. The guide sleeve is connected to the wiring part, and the guide sleeve and the wiring part can be threaded or slidably connected.

[0013] Furthermore, the positioning flat or interference straight hob is hollow, or the positioning flat and interference straight hob are both hollow and have internal threads. When both the positioning flat and interference straight hob are hollow, the screw or bolt can pass through the positioning flat and interference straight hob for fixation.

[0014] A positionable screw terminal connection device includes a rubber plate, a circuit board, and a positionable screw terminal. The rubber plate and the circuit board are fixedly connected by the positionable screw terminal. The rubber plate is provided with a positioning hook, which engages with the positioning hole of the positionable screw terminal. The rubber plate is also provided with positioning steps, at least two of which engage with the positioning flat portion of the positionable screw terminal. The circuit board is provided with a connecting hole, which is used to fix the positionable screw terminal to the external thread. Alternatively, there may be only one positioning step, in which case the positioning step engages with a mounting plate to fix the positioning flat portion of the positionable screw terminal.

[0015] Furthermore, the adhesive plate is provided with mounting positions, which are composed of mounting position plates; the mounting positions are mainly used to fix the positionable screw terminals, and can also play a positioning role; multiple mounting positions can be arranged in combination.

[0016] A positionable screw terminal connection device is disclosed, comprising a rubber plate and a circuit board, wherein the positionable screw terminal is fixedly connected. The rubber plate is provided with a positioning hook, which engages within the positioning hole of the positionable screw terminal. The rubber plate is also provided with positioning steps, which engage the positioning flat portion of the positionable screw terminal. The rubber plate is provided with a through hole corresponding to the positioning flat portion. The circuit board is provided with a connection hole. The rubber plate is fixedly connected to the positioning flat portion and / or the interference straight hobbing gear through the through hole; or the rubber plate is fixedly connected to the connection hole of the circuit board through the through hole, the positioning flat portion, and the interference straight hobbing gear.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] This invention utilizes an assembly positioning step to align the interference-fit straight hobbing gears when installing them into the assembly hole; the assembly guide chamfer provides guidance during alignment, overcoming the difficulty of inaccurate positioning during screw fastening when installing screw terminals on a circuit board, and solving problems such as misalignment, jamming, stripping, and slippage; the pressure plate in the fastening assembly compresses the wire inside the wiring section, causing a portion of the wire to embed into the slot and pressure groove, improving the reliability of wire fixation; and it eliminates the need to deform the wiring section, allowing for maintenance and wire replacement without replacing new screw terminals; the rubber plate positioning hook and rubber plate positioning step precisely fix the terminals, making circuit board installation faster, more secure, and more efficient. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a positionable screw terminal;

[0020] Figure 2 This is an exploded view of a positionable screw terminal.

[0021] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle;

[0022] Figure 4 This is a schematic diagram of the fastening assembly in a positionable screw terminal;

[0023] Figure 5 This is a schematic diagram of a positionable screw terminal connection device;

[0024] Figure 6 This is an exploded structural diagram of a positionable screw terminal connection device.

[0025] In the diagram: 1. Wiring section; 2. Fastening assembly; 21. Pressure plate; 22. Guide sleeve; 23. Socket head cap nut; 24. Screw; 25. Slot; 3. Wire groove; 4. Deformation opening; 5. Positioning hole; 6. Conductive sheet; 7. Assembly hole; 8. Positioning flat part; 9. Interference-fit straight hobbing gear; 10. Relief groove; 11. External thread; 12. Assembly positioning step; 13. Assembly guide chamfer; 14. Adhesive plate; 15. Circuit board; 16. Connecting hole; 17. Positioning step; 18. Positioning hook; 19. Mounting position; 191. Mounting position retainer; 20. Through hole. Detailed Implementation

[0026] Please see Figures 1-4 In this embodiment of the utility model, a positionable screw terminal includes a wiring part 1, a conductive sheet 6 is fixedly connected to the lower side of one end of the wiring part 1, a positioning hole is provided on the inner side of the conductive sheet 6 near the wiring part 1, and an assembly hole 7 is provided on the inner side of the conductive sheet 6 away from the wiring part 1, and a copper pillar is connected in the assembly hole 7.

[0027] exist Figure 1 and Figure 2 In the process, the copper pillar includes a positioning flat part 8, the upper end of which is fixedly connected to an interference straight hobbing tooth 9, and the upper end of the interference straight hobbing tooth 9 is fixedly connected to an external thread 11. A tool relief groove 10 is provided on the outer side of the external thread 11 near the interference straight hobbing tooth 9. The tool relief groove 10 provides a tool withdrawal space and serves as a clearance position when machining the external thread 11 to prevent the tool from colliding with the workpiece. The outer diameter of the interference straight hobbing tooth 9 is larger than the outer diameter of the assembly hole 7, and the interference straight hobbing tooth 9 and the assembly hole 7 are fixedly connected by an interference fit, so that the conductive terminal and the copper pillar can be reliably installed together.

[0028] exist Figure 2 and Figure 3 In the process, the upper outer end of the interference straight hob 9 is provided with an assembly positioning step 12, and the upper outer end of the assembly positioning step 12 is provided with an assembly guide chamfer 13. The assembly positioning step 12 can be used to align the interference straight hob 9 when it is installed in the assembly hole 7; the assembly guide chamfer 13 can play a guiding role during alignment, thereby overcoming the difficulty of inaccurate positioning during the screw fastening process when installing screw terminals on the circuit board, and solving the problems of misalignment, jamming, and slippage.

[0029] exist Figure 2 and Figure 4In this assembly, the fastening component 2 includes a pressure plate 21. A guide sleeve 22 is fixedly connected to the front end of the pressure plate 21, and several slots 25 are provided at the rear end of the pressure plate 21. A screw 24 is rotatably connected to the front end of the inner side of the guide sleeve 22, and an internal hex nut 23 is fixedly connected to the front end of the screw 24. The pressure plate 21 is located inside the wiring part 1, and the internal hex nut 23 is embedded and installed on the outer side of the wiring part 1. The wire is inserted into the wiring part 1, and then the internal hex nut 23 is rotated using an external hex wrench, so that the screw 24 rotates clockwise inside the guide sleeve 22. During the rotation, the screw 24 pushes the pressure plate 21 inward, clamping the wire between the pressure plate 21 and the wiring part 1. Through the cooperation of the slots 25 and the wire pressing grooves 3, a part of the wire is embedded in the slots 25 and the wire pressing grooves 3, which can improve the reliability of the wire fixation; and it does not require deformation of the wiring part 1, so that new screw terminals do not need to be replaced when inspecting or replacing the wire.

[0030] exist Figure 1 and Figure 2 In the middle, the wiring part 1 is a hollow cylindrical structure, and a deformation port 4 is provided at the upper end of the outer side of the wiring part 1. The wiring part 1 is squeezed by an external tool, so that the wiring part 1 deforms at the deformation port 4, and the wire can be firmly fixed in the wiring part 1.

[0031] A positionable screw terminal connection device, such as Figure 5 and Figure 6 As shown, the screw terminal is installed between the rubber plate 14 and the circuit board 15. The rubber plate 14 is provided with a positioning hook 18 corresponding to the positioning hole 5, and a set of positioning steps 17 corresponding to the positioning flat part 8. When the screw terminal is installed in the corresponding mounting position, the positioning flat part 8 is engaged between the set of positioning steps 17, and the positioning hook 18 is hooked into the positioning hole 5, thereby playing a "three-point positioning" role, so that the screw terminal is fixedly installed on the rubber plate 14; then the wire is fixed in the wiring part 1; the inner side of the circuit board 15 is provided with a connection hole 16 corresponding to the external thread 11. The external thread 11 is inserted into the corresponding connection hole 16. The connection hole 16 may also have its own thread. Then, a nut is screwed into the external thread 11, so that the rubber plate 14 and the circuit board 15 can be installed together, and the screw terminal is located between the rubber plate 14 and the circuit board 15; thus, a large current can be introduced to the PCB board.

[0032] To secure the terminals more quickly and firmly, the rubber plate 14 is provided with several mounting positions 19, each of which is composed of a mounting position clamping plate 191. Each screw terminal is placed into a mounting position 19 in the manner described above, and is then clamped by the mounting position clamping plate 191, making the screw terminal more secure.

[0033] Furthermore, the outer side of the adhesive plate 14 is provided with a through hole 20 corresponding to the positioning flat part 8; the circuit board 15 is provided with a connecting hole 16; a screw is used to fix the positioning flat part 8 and the interference straight hobbing tooth 9 through the through hole 20; or a screw is used to pass through the through hole 20, through the positioning flat part 8 and the interference straight hobbing tooth 9, through the connecting hole 16 on the circuit board 15, and then fixed with a nut.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A positionable screw terminal, comprising a wiring portion (1) and a conductive plate (6) fixed to the lower side of one end of the wiring portion (1), wherein a positioning hole (5) is provided on the inner side of the conductive plate (6) near the wiring portion (1), and an assembly hole (7) is provided on the inner side of the conductive plate (6) away from the wiring portion (1) for fixing and connecting a copper post, characterized in that, The copper pillar includes a positioning flat part (8), an interference straight hob (9) fixedly connected to the positioning flat part (8), and an external thread (11) fixedly connected to the interference straight hob (9).

2. The positionable screw terminal according to claim 1, characterized in that, An assembly positioning step (12) is provided on the upper outer side of the interference straight hob (9), and an assembly guide chamfer (13) is provided on the upper outer side of the assembly positioning step (12).

3. A positionable screw terminal according to claim 1, characterized in that, The outer side of the external thread (11) near the interference straight hob (9) has a relief groove (10).

4. A positionable screw terminal according to claim 1, characterized in that, The wiring part (1) is a hollow cylindrical structure, and a deformation port (4) is provided on the wiring part (1).

5. A positionable screw terminal according to claim 1, characterized in that, The inner wall of the wiring part (1) is provided with a wire pressing groove (3).

6. A positionable screw terminal according to claim 1, 4, or 5, characterized in that, The wiring part (1) is provided with a fastening assembly (2), which includes a pressure plate (21), a guide sleeve (22) on the outside of the pressure plate (21), and a slot (25) on the inside of the pressure plate (21). The guide sleeve (22) is connected to the wiring part (1).

7. A positionable screw terminal according to claim 1, characterized in that, The positioning flat (8) and / or the interference straight hob (9) are hollow and have internal threads, and can also be penetrated by a screw through the positioning flat (8) and the interference straight hob (9).

8. A positionable screw terminal connection device, characterized in that, The rubber plate (14) and the circuit board (15) are fixedly connected by the positionable screw terminal as described in any one of claims 1-6. The rubber plate (14) is provided with a positioning hook (18), which is hooked into the positioning hole (5) of the positionable screw terminal. The rubber plate (14) is also provided with a positioning step (17), which is locked between the positioning steps (17) to the positioning flat part (8) of the positionable screw terminal. The circuit board (15) is provided with a connecting hole (16), which is fixedly connected to the external thread (11) of the positionable screw terminal.

9. A positionable screw terminal connection device according to claim 8, characterized in that, The adhesive plate (14) is provided with a mounting slot (19), which is composed of a mounting plate (191).

10. A positionable screw terminal connection device, characterized in that, The rubber plate (14) and the circuit board (15) are fixedly connected by the positionable screw terminal as described in claim 7. The rubber plate (14) is provided with a positioning hook (18), which is hooked into the positioning hole (5) of the positionable screw terminal. The rubber plate (14) is also provided with a positioning step (17), which clamps the positioning flat part (8) of the positionable screw terminal between the positioning steps (17). The rubber plate (14) is provided with a through hole (20) corresponding to the positioning flat part (8). The circuit board (15) is provided with a connecting hole (16). The rubber plate (14) is fixedly connected to the positioning flat part (8) and / or the interference straight hobbing tooth (9) through the through hole (20). Alternatively, the rubber plate (14) is fixedly connected to the circuit board (15) through the through hole (20) and the connecting hole (16) through the positioning flat part (8) and the interference straight hobbing tooth (9).

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