Lead connecting structure for three-core wire

Abstract

The invention relates to the related technical field of three-core wires, in particular to a lead connecting structure for a three-core wire, which comprises a lower shell, a guide sheet is fixedly mounted on the inner wall of one side of the lower shell, a guide column is mounted in an inner bearing of the lower shell, a connecting groove is formed in the surface of the guide column, and a worm gear is fixedly mounted on the outer wall of the guide column. And a worm is mounted in the lower shell through a bearing. According to the lead connecting structure for the three-core wire, through the arrangement of the lower shell, the guide piece, the guide column, the connecting grooves, a worm gear, a worm, a first rotating block, a connecting frame, a two-way screw rod, a ball nut seat, a connecting block, a fixing plate and a second rotating block, when lead connecting work is carried out, three leads of the three-core wire are inserted into the three corresponding connecting grooves respectively, the first rotating block is rotated at the moment, and the first rotating block is rotated; the first rotating block drives the worm to rotate, the worm gear connected with the worm in a meshed mode drives the three guide columns to rotate at the same time, the lead is wound around the guide columns, the connecting grooves can be matched with different leads, and adaptability is higher.

Description

Technical Field

[0001] This invention relates to the field of three-core wire technology, and in particular to a lead connection structure for three-core wires. Background Technology

[0002] Three-core wire is a type of multi-core wire containing three independently insulated conductors. Its core function is to transmit electrical energy, signals, or perform specific functions simultaneously in a circuit. It is widely used in household appliances, industrial equipment, building wiring, and other scenarios. Three-core wire requires auxiliary tools during use and installation, such as lead wire connection devices. Lead wire connection devices can improve the portability and safety of three-core wire. Therefore, a lead wire connection structure for three-core wire is particularly needed.

[0003] However, existing three-core wire lead connection structures and most lead connection devices have poor compatibility with different types of three-core wires during lead connection work. They cannot adapt to different three-core wires and cannot guarantee the stability of the three-core wires during lead connection work, making them prone to shaking, loosening, or breaking. The safety of the lead connection is poor. Secondly, the outer casing of most lead connection devices cannot be opened. If some parts of the lead connection device are damaged, the repair is complicated and may require the entire device to be replaced, which increases the cost.

[0004] To address the aforementioned issues, a search revealed a patent with publication number CN105071192B that discloses a method for stripping three-core wires. The patent states that "with the development of the electronics industry, electronic products are becoming increasingly numerous, and these products place higher demands on the sockets they require. Therefore, socket designs are becoming more complex, functionally diverse, and larger in size. In the production of such sockets, the power cord typically uses a three-core wire, with varying lengths required at the socket end. If this type of three-core wire with varying lengths at the socket end is manufactured manually, it will result in a large workload and significant errors in the length of the wires produced manually. Therefore, an automatic wire stripping machine is used to replace manual labor and improve production efficiency. For example, an automatic wire stripping machine with application number 201520385650.2, entitled 'A Color-Separated Wire Stripping Machine,' can be used to strip three-core wires of varying lengths." The invention addresses the issue of three-core wires. While the invention mentions a double-stripping method that saves materials and reduces waste, particularly beneficial for assembly line operations, it also highlights the drawbacks of traditional methods. The invention's advantages include material savings and reduced waste, leading to significant material savings over time and reduced hassle of handling wire ends. However, the invention notes that the auxiliary wire connection devices are poorly adapted to different types of three-core wires, failing to provide stable connections and prone to shaking, loosening, or breakage. Furthermore, the lack of security in these connections complicates repairs, as the outer casing of most connection devices cannot be opened. Damage to internal components can lead to complex repairs and potential replacement of the entire device, increasing costs.

[0005] In light of this, in-depth research into the aforementioned issues led to the creation of this case. Summary of the Invention

[0006] The purpose of this invention is to provide a lead wire connection structure for three-core wires, to solve the problems mentioned in the background art. Most lead wire connection devices have poor adaptability to different types of three-core wires during lead wire connection, failing to accommodate various wire types. Furthermore, they cannot guarantee the stability of the three-core wires during connection, making them prone to shaking, loosening, or breakage, resulting in poor safety. Additionally, the outer casing of most lead wire connection devices cannot be opened, making repairs difficult and potentially requiring complete replacement, thus increasing costs.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a lead wire connection structure for a three-core wire, comprising a lower shell, a guide plate fixedly installed on one inner wall of the lower shell, a guide post installed in the internal bearing of the lower shell, a connecting groove formed on the surface of the guide post, a worm gear fixedly installed on the outer wall of the guide post, a worm installed in the internal bearing of the lower shell, a first rotating block fixedly installed at one end of the worm, connecting frames fixedly installed on both sides of the lower shell, a bidirectional screw installed in the internal bearing of the connecting frame, a ball nut seat sleeved on the outer wall of the bidirectional screw, a connecting block fixedly installed on the outer wall of the ball nut seat, and a connecting block on one side of the connecting block. A fixed plate is fixedly installed. An auxiliary rod is fixedly installed inside the connecting frame. An auxiliary block is sleeved on the outer wall of the auxiliary rod. A second rotating block is fixedly installed at one end of the bidirectional screw. A first mounting plate is fixedly installed on both sides of the lower shell. A third spring is fixedly installed inside the first mounting plate. A locking block is fixedly installed at one end of the third spring. A pull rod is fixedly installed on the side surface of the locking block connected to the third spring. A mounting block is embedded in the opening of the first mounting plate. A slot is opened on one side surface of the mounting block. A second mounting plate is fixedly installed on one side surface of the mounting block. An upper shell is fixedly installed on one side surface of the second mounting plate.

[0008] Preferably, the worm gear forms a rotating structure with the lower shell via a guide post, and the worm gear and the worm are meshed together.

[0009] Preferably, a first connecting shell is fixedly installed on one side surface of the first rotating block, a first spring is fixedly installed inside the first connecting shell, a first moving block is fixedly installed at one end of the first spring, and a first limiting rod is fixedly installed at one end of the first moving block.

[0010] Preferably, a first limiting hole is provided on one side surface of the lower shell, and the first limiting holes are equally spaced on one side surface of the lower shell.

[0011] Preferably, the bidirectional screw and the connecting frame form a sliding structure, and the two ends of the fixing plate are fixedly connected to the connecting block and the auxiliary block, respectively.

[0012] Preferably, a limiting block is fixedly installed on one side surface of the connecting block, and limiting grooves are formed on the inner walls of both sides of the connecting frame. The limiting block forms a sliding structure with the connecting frame through the limiting grooves, and limiting blocks are fixedly installed on one side surface of both the connecting block and the auxiliary block.

[0013] Preferably, a second connecting shell is fixedly installed on one side surface of the second rotating block, a second spring is fixedly installed inside the second connecting shell, a second moving block is fixedly installed at one end of the second spring, and a second limiting rod is fixedly installed at one end of the second moving block.

[0014] Preferably, a second limiting hole is provided on one side surface of the connecting frame, and the second limiting hole is provided at equal intervals on one side surface of the connecting frame.

[0015] Preferably, the size of the card block matches the size of the card slot, and the card block forms a telescopic structure with the first mounting plate through a third spring.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: The three-core wire lead-connection structure, through the arrangement of a lower shell, guide plate, guide post, connecting groove, worm gear, worm, first rotating block, connecting frame, bidirectional screw, ball nut seat, connecting block, fixing plate, auxiliary rod, auxiliary block, limiting block, limiting groove, second rotating block, first mounting plate, third spring, locking block, pull rod, mounting block, locking groove, second mounting plate, and upper shell, allows the three leads of the three-core wire to be inserted into three corresponding connecting grooves during lead-connection. At this time, rotating the first rotating block causes the worm to rotate, and the worm gear meshing with the worm simultaneously rotates the three leads. The guide post rotates, allowing the lead wire to wind around it. The connecting slot can accommodate different lead wires, making it more adaptable. After winding, the second rotating block rotates, causing the bidirectional screw to rotate. At this time, the two ball nut seats will move towards the lead wire through the connecting block and the fixing plate. The fixing plate can clamp and fix the lead wire, making the connected lead wire more stable and preventing it from shaking, loosening, or breaking. Secondly, when the guide plate or guide post needs to be repaired or replaced, the pull rod can be pulled. The pull rod can pull the locking block out of the locking slot. At this time, the mounting block can be separated from the first mounting plate, so that the upper shell can be separated from the lower shell, which facilitates the repair or replacement of the guide plate and guide post and reduces costs. Attached Figure Description

[0017] Figure 1 This is a side view of the structure of the present invention; Figure 2 This is a schematic diagram of the interaction between the guide post and the worm gear in this invention; Figure 3 This is a schematic diagram of the cooperative structure of the first spring and the first moving block of the present invention; Figure 4 This is a schematic diagram of the interlocking structure of the connecting block and the fixing plate of the present invention; Figure 5 This is a schematic diagram of the interlocking structure of the connecting frame and the limiting groove of the present invention; Figure 6 This is a schematic diagram of the cooperative structure of the second spring and the second moving block of the present invention; Figure 7 This is a schematic diagram of the interlocking structure of the card block and the pull rod of the present invention; Figure 8 For the present invention Figure 2 Enlarged structural diagram at point A in the diagram; Figure 9 For the present invention Figure 5 A magnified structural diagram at point B in the diagram.

[0018] In the diagram: 1. Lower shell; 2. Guide plate; 3. Guide post; 4. Connecting groove; 5. Worm gear; 6. Worm; 7. First rotating block; 8. First connecting shell; 9. First spring; 10. First moving block; 11. First limiting rod; 12. First limiting hole; 13. Connecting frame; 14. Bidirectional screw; 15. Ball bearing nut seat; 16. Connecting block; 17. Fixing plate; 18. Auxiliary rod; 19. Auxiliary block; 20. Limiting block; 21. Limiting groove; 22. Second rotating block; 23. Second connecting shell; 24. Second spring; 25. Second moving block; 26. Second limiting rod; 27. Second limiting hole; 28. First mounting plate; 29. ​​Third spring; 30. Locking block; 31. Pull rod; 32. Mounting block; 33. Locking groove; 34. Second mounting plate; 35. Upper shell. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1-9This invention provides a technical solution: a lead wire connection structure for a three-core wire, comprising a lower shell 1, a guide plate 2 fixedly installed on one inner wall of the lower shell 1, a guide post 3 installed in the internal bearing of the lower shell 1, a connecting groove 4 formed on the surface of the guide post 3, a worm gear 5 fixedly installed on the outer wall of the guide post 3, a worm 6 installed in the internal bearing of the lower shell 1, a first rotating block 7 fixedly installed at one end of the worm 6, connecting frames 13 fixedly installed on both sides of the lower shell 1, a bidirectional screw 14 installed in the internal bearing of the connecting frame 13, a ball nut seat 15 sleeved on the outer wall of the bidirectional screw 14, a connecting block 16 fixedly installed on the outer wall of the ball nut seat 15, a fixing plate 17 fixedly installed on one side of the connecting block 16, and an auxiliary rod fixedly installed inside the connecting frame 13. 18. An auxiliary block 19 is fitted on the outer wall of the auxiliary rod 18. A second rotating block 22 is fixedly installed at one end of the bidirectional screw 14. A first mounting plate 28 is fixedly installed on both sides of the lower shell 1. A third spring 29 is fixedly installed inside the first mounting plate 28. A locking block 30 is fixedly installed at one end of the third spring 29. A pull rod 31 is fixedly installed on the side surface of the locking block 30 connected to the third spring 29. A mounting block 32 is embedded in the opening of the first mounting plate 28. A slot 33 is opened on one side surface of the mounting block 32. A second mounting plate 34 is fixedly installed on one side surface of the mounting block 32. An upper shell 35 is fixedly installed on one side surface of the second mounting plate 34. The lower shell 1, guide plate 2, guide post 3, connecting groove 4, worm gear 5, worm 6, and first rotating block 28 are connected. The components 7 (rotating block), 13 (connecting frame), 14 (bidirectional screw), 15 (ball bearing nut seat), 16 (connecting block), 17 (fixing plate), 18 (auxiliary rod), 19 (auxiliary block), 20 (limiting block), 21 (limiting groove), 22 (second rotating block), 28 (first mounting plate), 29 (third spring), 30 (clamping block), 31 (pull rod), 32 (mounting block), 33 (clamping groove), 34 (second mounting plate), and 35 are arranged such that, during lead wire connection, the three leads of the three-core wire are inserted into the three corresponding connecting grooves 4. Rotating the first rotating block 7 causes the worm gear 6 to rotate, and the worm wheel 5, which meshes with the worm gear 6, simultaneously rotates the three guide posts 3, allowing the lead wires to wind around the guide posts 3. The connecting grooves 4 can accommodate different lead wires, offering greater adaptability. After winding, the wires are rotated... The second rotating block 22 rotates the bidirectional screw 14. At this time, the two ball bearing nut seats 15 move towards the lead wire via the connecting block 16 and the fixing plate 17. The fixing plate 17 clamps and fixes the lead wire. Meanwhile, the auxiliary block 19 slides on the auxiliary rod 18, assisting and limiting the movement of the fixing plate 17, making the connected lead wire more stable and preventing wobbling, loosening, or breakage. Furthermore, when the guide plate 2 or guide post 3 needs repair or replacement, the pull rod 31 is pulled. The pull rod 31 pulls the locking block 30 out of the slot 33, allowing the mounting block 32 to leave the first mounting plate 28. This allows the upper shell 35 to leave the lower shell 1, facilitating the repair or replacement of the guide plate 2 and guide post 3 and reducing costs.When the repair or replacement work is completed, the mounting block 32 is inserted into the first mounting plate 28. At this time, under the action of the third spring 29, the locking block 30 will be fixed in the locking groove 33, and the first mounting plate 28 and the second mounting plate 34 will be fixedly connected together. At this time, the lower shell 1 and the upper shell 35 will also be fixedly connected together.

[0021] Furthermore, the worm gear 5 forms a rotating structure with the lower shell 1 through the guide post 3. The worm gear 5 and the worm 6 are meshed. With the setting of the worm 6, when the worm 6 rotates, the worm gear 5 meshing with the worm 6 will rotate with the guide post 3, so that the lead wire passing through the connecting groove 4 can be wound on the guide post 3 to complete the lead wire connection work.

[0022] Furthermore, a first connecting shell 8 is fixedly installed on one side surface of the first rotating block 7. A first spring 9 is fixedly installed inside the first connecting shell 8. A first moving block 10 is fixedly installed at one end of the first spring 9. A first limiting rod 11 is fixedly installed at one end of the first moving block 10. With the arrangement of the first connecting shell 8, the first spring 9, the first moving block 10 and the first limiting rod 11, when the first rotating block 7 needs to be rotated, the first limiting rod 11 is pulled. When the first limiting rod 11 leaves the first limiting hole 12, the first rotating block 7 can smoothly rotate with the worm gear 6. When the first rotating block 7 rotates to the appropriate position and angle, the first limiting rod 11 is released. At this time, under the action of the first spring 9, the first moving block 10 will bring the first limiting rod 11 back to its original position, so that the first limiting rod 11 can be inserted into the first limiting hole 12 at the corresponding position, thereby limiting and fixing the first rotating block 7 and the worm gear 6.

[0023] Furthermore, a first limiting hole 12 is provided on one side surface of the lower shell 1. The first limiting holes 12 are equally spaced on one side surface of the lower shell 1. Through the setting of the first limiting hole 12, the first limiting rod 11 can be inserted into the first limiting hole 12, thereby limiting and fixing the worm gear 6 and the first rotating block 7.

[0024] Furthermore, the bidirectional screw 14 and the connecting frame 13 form a sliding structure. The two ends of the fixing plate 17 are fixedly connected to the connecting block 16 and the auxiliary block 19, respectively. With the setting of the bidirectional screw 14, when the bidirectional screw 14 rotates, the two ball nut seats 15 will move simultaneously through the connecting block 16 with the fixing plate 17 towards the direction of the lead wire. The fixing plate 17 can clamp and fix the lead wire, making the lead wire more stable and preventing the lead wire from shaking, loosening or breaking.

[0025] Furthermore, a limiting block 20 is fixedly installed on one side surface of the connecting block 16, and limiting grooves 21 are opened on both sides of the inner wall of the connecting frame 13. The limiting block 20 forms a sliding structure with the connecting frame 13 through the limiting grooves 21. The limiting block 20 is fixedly installed on one side surface of both the connecting block 16 and the auxiliary block 19. With the setting of the limiting block 20 and the limiting grooves 21, the limiting block 20 will slide in the limiting grooves 21 when the connecting block 16 and the auxiliary block 19 move. The limiting block 20 can assist and limit the movement of the connecting block 16 and the auxiliary block 19.

[0026] Furthermore, a second connecting shell 23 is fixedly installed on one side surface of the second rotating block 22. A second spring 24 is fixedly installed inside the second connecting shell 23. A second moving block 25 is fixedly installed at one end of the second spring 24. A second limiting rod 26 is fixedly installed at one end of the second moving block 25. With the arrangement of the second connecting shell 23, the second spring 24, the second moving block 25, and the second limiting rod 26, when the bidirectional screw 14 needs to be rotated, the second limiting rod 26 is pulled. When the second limiting rod 26 leaves the second limiting hole 27, the second rotating block 22 can rotate with the bidirectional screw 14. When the bidirectional screw 14 and the second rotating block 22 rotate to the appropriate position and angle, the second limiting rod 26 is released. At this time, under the action of the second spring 24, the second moving block 25 will return to its original position with the second limiting rod 26. The second limiting rod 26 will then be inserted into the corresponding position of the second limiting hole 27, thereby limiting and fixing the bidirectional screw 14 and the second rotating block 22.

[0027] Furthermore, a second limiting hole 27 is provided on one side surface of the connecting frame 13. The second limiting holes 27 are equally spaced on one side surface of the connecting frame 13. Through the setting of the second limiting hole 27, the second limiting rod 26 can be inserted into the second limiting hole 27, thereby limiting and fixing the bidirectional screw 14 and the second rotating block 22.

[0028] Furthermore, the size of the locking block 30 matches that of the locking slot 33. The locking block 30 forms a telescopic structure with the first mounting plate 28 through the third spring 29. With the setting of the third spring 29, when the pull rod 31 is not under force, the locking block 30 will be locked into the locking slot 33 under the action of the third spring 29, thereby fixing the mounting block 32 in the first mounting plate 28. The first mounting plate 28 and the second mounting plate 34 will be fixedly connected together, and the lower shell 1 and the upper shell 35 will be fixedly connected together.

[0029] Working principle: During lead wire connection, the three leads of the three-core wire are inserted into the three corresponding connecting slots 4. Then, rotating the first rotating block 7 causes the worm gear 6 to rotate. The worm wheel 5, meshing with the worm gear 6, simultaneously rotates the three guide posts 3, allowing the lead wires to wind around them. After winding, rotating the second rotating block 22 causes the bidirectional screw 14 to rotate. At this time, the two ball bearing nut seats 15 move towards the lead wires via the connecting block 16, carrying the fixing plate 17. The fixing plate 17 clamps and fixes the lead wires. Meanwhile, the auxiliary block 19... The auxiliary rod 18 slides upwards, and the auxiliary block 19 can assist and limit the movement of the fixed plate 17. Secondly, when the guide plate 2 or guide post 3 needs repair or replacement, the pull rod 31 is pulled. The pull rod 31 can pull the locking block 30 out of the slot 33. At this time, the mounting block 32 can leave the first mounting plate 28, so the upper shell 35 can leave the lower shell 1, facilitating the repair or replacement of the guide plate 2 and guide post 3. When the repair or replacement work is completed, the mounting block 32 is embedded into the first mounting plate 28. At this time, under the action of the third spring 29, the locking block 30 will be fixed in the slot 33. The second mounting plate 34 will then be fixedly connected together, and the lower shell 1 and the upper shell 35 will also be fixedly connected together. When the first rotating block 7 needs to be rotated, the first limiting rod 11 will be pulled. When the first limiting rod 11 leaves the first limiting hole 12, the first rotating block 7 can smoothly rotate with the worm gear 6. When the first rotating block 7 rotates to the appropriate position and angle, the first limiting rod 11 will be released. At this time, under the action of the first spring 9, the first moving block 10 will bring the first limiting rod 11 back to its original position, so that the first limiting rod 11 can be locked into the first limiting hole 12 at the corresponding position, thereby controlling the first rotation. Block 7 and worm gear 6 are limited and fixed. When the bidirectional screw 14 needs to be rotated, the second limiting rod 26 is pulled. When the second limiting rod 26 leaves the second limiting hole 27, the second rotating block 22 can rotate the bidirectional screw 14. When the bidirectional screw 14 and the second rotating block 22 rotate to the appropriate position and angle, the second limiting rod 26 is released. At this time, under the action of the second spring 24, the second moving block 25 will take the second limiting rod 26 back to its original position. The second limiting rod 26 will then be locked into the corresponding position of the second limiting hole 27, thereby limiting and fixing the bidirectional screw 14 and the second rotating block 22.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lead wire connection structure for a three-core wire, comprising a lower shell (1), characterized in that: A guide plate (2) is fixedly installed on one inner wall of the lower shell (1). A guide post (3) is installed in the internal bearing of the lower shell (1). A connecting groove (4) is opened on the surface of the guide post (3). A worm gear (5) is fixedly installed on the outer wall of the guide post (3). A worm (6) is installed in the internal bearing of the lower shell (1). A first rotating block (7) is fixedly installed at one end of the worm (6). A connecting frame (13) is fixedly installed on both sides of the lower shell (1). A double-acting screw (14) is installed in the internal bearing of the connecting frame (13). A ball nut seat (15) is sleeved on the outer wall of the double-acting screw (14). A connecting block (16) is fixedly installed on the outer wall of the ball nut seat (15). A fixing plate (17) is fixedly installed on one side surface of the connecting block (16). An auxiliary... An auxiliary rod (18) is fitted with an auxiliary block (19) on its outer wall. A second rotating block (22) is fixedly installed at one end of the bidirectional screw (14). A first mounting plate (28) is fixedly installed on both sides of the lower shell (1). A third spring (29) is fixedly installed inside the first mounting plate (28). A locking block (30) is fixedly installed at one end of the third spring (29). A pull rod (31) is fixedly installed on the side surface of the locking block (30) connected to the third spring (29). An mounting block (32) is embedded in the opening of the first mounting plate (28). A slot (33) is opened on one side surface of the mounting block (32). A second mounting plate (34) is fixedly installed on one side surface of the mounting block (32). An upper shell (35) is fixedly installed on one side surface of the second mounting plate (34).

2. The lead connection structure for a three-core wire according to claim 1, characterized in that: The worm wheel (5) forms a rotating structure with the lower shell (1) through the guide post (3), and the worm wheel (5) and the worm (6) are meshed.

3. The lead connection structure for a three-core wire according to claim 1, characterized in that: A first connecting shell (8) is fixedly installed on one side surface of the first rotating block (7). A first spring (9) is fixedly installed inside the first connecting shell (8). A first moving block (10) is fixedly installed at one end of the first spring (9). A first limiting rod (11) is fixedly installed at one end of the first moving block (10).

4. The lead connection structure for a three-core wire according to claim 1, characterized in that: The lower shell (1) has a first limiting hole (12) on one side surface, and the first limiting hole (12) is opened at equal intervals on one side surface of the lower shell (1).

5. The lead connection structure for a three-core wire according to claim 1, characterized in that: The bidirectional screw (14) and the connecting frame (13) form a sliding structure, and the two ends of the fixing plate (17) are fixedly connected to the connecting block (16) and the auxiliary block (19) respectively.

6. The lead connection structure for a three-core wire according to claim 1, characterized in that: A limiting block (20) is fixedly installed on one side surface of the connecting block (16), and a limiting groove (21) is opened on the inner walls of both sides of the connecting frame (13). The limiting block (20) and the connecting frame (13) form a sliding structure through the limiting groove (21). The limiting block (20) is fixedly installed on one side surface of both the connecting block (16) and the auxiliary block (19).

7. The lead connection structure for a three-core wire according to claim 1, characterized in that: A second connecting shell (23) is fixedly installed on one side surface of the second rotating block (22). A second spring (24) is fixedly installed inside the second connecting shell (23). A second moving block (25) is fixedly installed at one end of the second spring (24). A second limiting rod (26) is fixedly installed at one end of the second moving block (25).

8. The lead connection structure for a three-core wire according to claim 1, characterized in that: A second limiting hole (27) is provided on one side surface of the connecting frame (13), and the second limiting hole (27) is provided at equal intervals on one side surface of the connecting frame (13).

9. The lead connection structure for a three-core wire according to claim 1, characterized in that: The size of the card block (30) matches that of the card slot (33), and the card block (30) forms a telescopic structure with the first mounting plate (28) through the third spring (29).

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