A wiring terminal

Abstract

The application relates to a wiring terminal which comprises a shell, an elastic sheet in the shell and a welding sheet, the welding sheet comprises a current-carrying main plate, opposite sides of the current-carrying main plate are vertically bent to form a first baffle and a second baffle respectively, the first baffle is connected with the current-carrying main plate through a connecting plate, opposite sides of the connecting plate are vertically bent to form vertical plates, the bending direction of the vertical plates is opposite to that of the first baffle, a clamping plate is arranged on one side of the vertical plate close to the first baffle, and the surface of the vertical plate opposite to the current-carrying main plate is higher than the clamping plate; the elastic sheet comprises a fixing part, an intermediate part and a free part which are sequentially connected, the intermediate part is connected with the shell, the fixing part is located between the vertical plate and the first baffle, and a clamping groove for cooperating with the clamping plate is arranged on the side edge of the fixing part; and the free part is used for elastically abutting against the side of the second baffle opposite to the first baffle. The application has the effect of improving the connection stability of the elastic sheet and the welding sheet.

Description

Technical Field

[0001] This application relates to the field of electrical connection structures, and more particularly to a terminal block. Background Technology

[0002] Terminal blocks are commonly used as nodes for connecting circuits and are applied in various electrical devices.

[0003] like Figure 13 As shown, the existing terminal block includes a housing, a solder pad 2, and a spring 3. The solder pad 2 includes a current-carrying main board 23 and baffles fixed on both sides of the current-carrying main board 23. The solder pad 2 is connected to the circuit through solder feet 20. One end of the spring 3 is connected to the solder pad 2, and the other end of the spring 3 elastically abuts against one baffle of the solder pad 2.

[0004] When in use, the wire is inserted into the elastic contact position between the spring 3 and the baffle. At this time, the spring 3 and the baffle together clamp the wire to achieve fixation and electrical connection.

[0005] The specific connection between the spring 3 and the solder pad 2 is as follows: a groove 30 is provided on one side of the spring 3, and the spring 3 is used to lock onto the current-carrying main board 23 of the solder pad 2 to achieve the connection.

[0006] However, the contact area between the spring and the current-carrying motherboard is affected by the thickness of the current-carrying motherboard, and the thickness of the current-carrying motherboard is limited. Therefore, the stability of this contact is poor and it is easy to loosen and detach. Summary of the Invention

[0007] To improve the connection stability between the spring and the solder pad, this application provides a terminal block.

[0008] The terminal block provided in this application adopts the following technical solution:

[0009] A terminal block includes a housing, a spring contact and a solder pad located within the housing. The solder pad includes a current-carrying main board. A first baffle and a second baffle are vertically bent on opposite sides of the current-carrying main board, respectively. The first baffle and the current-carrying main board are connected by a connecting plate. Vertical plates are vertically bent on opposite sides of the connecting plate, with the bending direction of the vertical plates opposite to that of the first baffle. A retaining plate is provided on the side of the vertical plate closest to the first baffle, and the surface of the vertical plate relative to the current-carrying main board is higher than the retaining plate. The spring contact includes a fixed portion, a middle portion, and a free portion connected in sequence. The middle portion is connected to the housing. The fixed portion is located between the vertical plate and the first baffle, and a groove for engaging with the retaining plate is provided on the side of the fixed portion. The free portion is used to elastically abut against the side of the second baffle relative to the first baffle.

[0010] By adopting the above technical solution, when in use, the spring is inserted downwards, so that the fixing part of the spring enters between the first baffle and the upright plate, and then the fixing part is installed by the snap-fit ​​between the slot of the fixing part and the plate.

[0011] First, the first baffle and the upright plate together limit the first dimension of the fixing part, and the cooperation between the card plate and the card slot limits the second dimension of the fixing part, so as to greatly improve the positional stability of the fixing part relative to the welding piece.

[0012] Secondly, the contact area between the upright plate and the slot is larger, resulting in a tighter connection.

[0013] Finally, by utilizing the elasticity of the welding sheet itself, the first baffle and the upright plate can clamp the other part of the corresponding slot of the fixing part. Then, by combining the cooperation of the clamping plate and the slot, the large part of the fixing part is limited, thereby greatly improving the positional stability of the fixing part relative to the welding sheet.

[0014] Optionally, a first chamfer is provided at the junction between the end face of the upright plate away from the current-carrying main plate and the side face of the upright plate facing the first baffle.

[0015] By adopting the above technical solution, during the installation of the spring clip, the first chamfer guides the fixing part of the inserted spring clip to correct the insertion path of the fixing part, thereby improving the accuracy of the fixing part being inserted into the area between the upright plate and the first baffle.

[0016] Optionally, the edge of the card plate opposite to the end face of the current-carrying motherboard is provided with a second chamfer.

[0017] By adopting the above technical solution, during the installation of the spring clip, the groove edge of the slot will abut against the second chamfer. The second chamfer guides the fixing part of the inserted spring clip, thereby correcting the insertion path of the fixing part and improving the fitting accuracy between the slot and the plate.

[0018] Optionally, a third chamfer is provided at the junction between the side of the fixing part facing the current-carrying motherboard and the groove wall of the card slot.

[0019] By adopting the above technical solution, during the installation of the spring clip, the third chamfer at the groove opening of the slot will abut against the second chamfer or the edge of the end face of the card plate. Then, through the guiding effect of the third chamfer on the fixing part of the inserted spring clip, the insertion path of the fixing part is corrected, thereby improving the fitting accuracy between the slot and the card plate.

[0020] Optionally, the housing is provided with a limiting block, which is located on the side away from the current-carrying motherboard relative to the free part; when the free part elastically abuts against the side of the second baffle relative to the first baffle, the limiting block blocks the free part from moving along the direction away from the current-carrying motherboard.

[0021] By adopting the above technical solution, after the spring is compressed and installed into the housing, the spring returns to its original shape, and the free part of the spring abuts against the side of the second baffle relative to the first baffle. At this time, the limiting block blocks the free part from moving along the direction away from the current-carrying main board. In this way, the spring is restricted from leaving the housing, thereby playing a further limiting role.

[0022] Optionally, the housing is provided with an insertion hole for inserting a wire into the housing. The wall of the insertion hole is provided with a receiving annular groove. A rubber ring is placed in the receiving annular groove. The rubber ring is movably connected to the receiving annular groove and is coaxially arranged with the insertion hole. The housing is provided with a locking mechanism. When the rubber ring flips, the locking mechanism converts the tangential frictional force in the cross-sectional direction of the rubber ring into a force that restricts the free part from moving along its own length direction.

[0023] By adopting the above technical solution, when the wire is inserted into the housing through the insertion hole, the wire is clamped by the second baffle and the free part. During the insertion of the wire, the rubber sleeve on the wire will slide relative to the rubber ring. This sliding friction will cause the rubber ring to rotate around its own circular outline. The locking mechanism converts the tangential friction force in the cross-sectional direction of the rubber ring into a force that restricts the movement of the free part along its own length. In this way, the free part in the clamped state is prevented from moving along its own length, which reduces the clamping force on the wire caused by the movement of the free part due to the overall loosening of the spring piece, thus improving the clamping effect on the wire.

[0024] Furthermore, the rubber ring can greatly reduce the gap between the wire and the insertion hole wall, thereby greatly improving the sealing performance.

[0025] Optionally, the housing contains a mounting post, and the middle portion is partially arc-shaped around the mounting post. The locking mechanism includes an arc-shaped plate, a first connecting rod, a second connecting rod, and a limiting ball head. The ends of the first connecting rod and the second connecting rod are fixed together, and the connection between the first connecting rod and the second connecting rod is rotatably connected to the mounting post. The other end of the first connecting rod is fixed to the arc-shaped plate, the center of curvature of the arc-shaped plate is the axis of the mounting post, and the convex arc surface of the arc-shaped plate is tangent to the outer circumferential surface of the rubber ring. The end of the second connecting rod away from the first connecting rod is fixedly connected to the limiting ball head, and the free portion is provided with a bearing arc plate for the limiting ball head to abut against. When the free portion deforms to clamp the wire, the angle between the second connecting rod and the free portion is less than 10°.

[0026] By adopting the above technical solution, when the wire is inserted into the housing through the insertion hole, the wire is clamped by the second baffle and the free part. During the insertion of the wire, the rubber sleeve on the wire will slide relative to the rubber ring. This sliding friction will cause the rubber ring to rotate around its own circular outline, thereby causing the arc plate to rotate around the axis of the mounting column by a certain angle. Then, it will sequentially drive the first and second connecting rods to swing, thereby causing the limiting ball head to move to the bearing arc plate. At this time, the angle between the second connecting rod and the free part is less than 10°. By the limiting ball head abutting against the bearing arc plate, the free part is prevented from moving along its own length direction and toward the mounting column. In this way, the degree of freedom of the first half of the free part is small, thereby improving its rigidity and reducing the generation of deformation. This reduces the occurrence of the free part easily deforming and detaching due to the forceful pulling out of the wire. Secondly, it reduces the degree of freedom of the entire free part along its own length direction, that is, it reduces the clamping force on the wire caused by the movement of the free part due to the overall loosening of the spring piece, thus improving the clamping effect on the wire.

[0027] Optionally, the housing is provided with an unclamping mechanism. When the rubber ring rotates in the opposite direction around the axis of the insertion hole, the unclamping mechanism converts the circumferential tangential friction of the rubber ring into a force that forces the free part to move away from the second baffle.

[0028] When the wire is pulled out forcefully or quickly, if the clamping force of the free part is too large, the end of the wire may be torn off. By adopting the above technical solution and setting an unclamping mechanism, when preparing to remove the wire, the wire can be rotated in the opposite direction, and then the friction force is used to drive the rubber ring to rotate. The circumferential tangential friction force of the rubber ring is converted into a force that forces the free part to move away from the second baffle, thereby releasing the unidirectional clamping of the free part on the wire, so that the wire can be easily removed.

[0029] Optionally, the unclamping mechanism includes two parallel screws, which are threadedly connected to the housing. The screws are parallel to the axis of the insertion hole. One end of each screw has a round screw head that is tangential to the outer diameter of the rubber ring. The other end of each screw extends between the free part and the second baffle.

[0030] By adopting the above technical solution, when preparing to remove the wire, the wire can be rotated in the opposite direction, and then the friction force is used to drive the rubber ring to rotate. The rubber ring then uses the friction force to drive the round screw head to rotate, thereby driving the screw to extend into the space between the free part and the second baffle. Then the screw pushes the free part away from the wire to release the free part from clamping the wire. The screw drive has a self-locking mechanism, and the screw will not be difficult to extend due to the elasticity of the free part. That is, a small friction force is converted into a large but short-stroke opening force.

[0031] Optionally, the surface of the rubber ring has a helical arrangement of screw teeth; the unclamping mechanism includes two parallel screws, which are threadedly connected to the housing and are parallel to the axis of the insertion hole. One end of the screw is provided with a worm gear head, the teeth of which mesh with the screw teeth of the rubber ring, and the other end of the screw extends between the free part and the second baffle.

[0032] By adopting the above technical solution, there is no need to rotate the wire multiple times. The two operations can be completed simply by pulling the wire out of the insertion hole. Specifically, when the wire is inserted into the insertion hole, the rubber ring flips as the wire extends, and the locking mechanism locks the free part to fix the end of the wire. Then, the wire is forced to extend further into the housing. Since the end of the wire has been locked, the rest of the wire will bend, resulting in a larger length of wire inside the housing. This bending length is the subsequent extraction allowance.

[0033] When the wire needs to be pulled out, the pulling operation first consumes the remaining length of the wire, meaning the end position of the wire does not change due to the pulling out. The pulling out of the wire applies friction to the rubber ring, and this sliding friction causes the rubber ring to rotate around its own circular outline. Then, the cooperation between the rubber ring and the arc plate releases the lock on the free part. At the same time, the rubber ring also engages with the teeth of the worm gear head through its screw teeth, similar to a worm gear, to drive the worm gear head to rotate, thereby driving the screw to screw forward. After the remaining length is pulled out, the screw has just screwed forward enough to push the free part off the wire, thus releasing the free part from the wire end. Then, the wire can be pulled out again, which is more convenient. That is, only the wire needs to be pulled out to complete the triggering of the release mechanism and the unlocking mechanism, without rotating the wire, which is convenient and quick.

[0034] Furthermore, due to the initial locking mechanism, the end of the wire can be firmly clamped, so that when the wire is inserted, the end of the wire will not continue to move, but the rest of the wire will bend to leave a length margin. This length margin is used for subsequent safety. For example, when the wire is pulled hard by an external force, this length margin will be consumed first, thereby reducing the possibility of the wire end being directly broken due to excessive force when the wire is pulled hard. In addition, with the one-way damping rubber ring, it can also absorb the energy of the external force.

[0035] In summary, this application includes at least one of the following beneficial technical effects:

[0036] 1. The first baffle and the upright plate together limit the first dimension of the fixing part, and the cooperation between the card plate and the card slot limits the second dimension of the fixing part. Furthermore, the cooperation between the card plate and the card slot in the upright state results in a larger contact area and a tighter engagement.

[0037] 2. By setting the first chamfer, the second chamfer, and the third chamfer, the fixing part of the inserted spring is guided to correct the insertion path of the fixing part and improve the insertion accuracy of the fixing part;

[0038] 3. By setting up a locking mechanism and a release mechanism, the device utilizes the insertion friction and rotational friction of the wire to trigger the action. This not only improves the clamping effect when holding the wire, but also allows for quick and easy release of the wire, facilitating its removal or replacement. Furthermore, both the triggering and operation are completed within the housing, ensuring good sealing. Attached Figure Description

[0039] Figure 1 This is an exploded view of the overall structure of Example 1.

[0040] Figure 2 This is an exploded view of the overall structure of Example 1.

[0041] Figure 3 This is an exploded view of the conductive connection structure of Example 1.

[0042] Figure 4 This is a top view of the overall structure of Embodiment 1.

[0043] Figure 5 This is an exploded view of the overall structure of Example 2.

[0044] Figure 6 This is a schematic diagram of the overall structure of Example 3.

[0045] Figure 7 yes Figure 6 A cross-sectional view along the AA direction.

[0046] Figure 8 This is a schematic diagram of Example 3 illustrating the flipping and rotation directions of the rubber ring.

[0047] Figure 9 yes Figure 6 A cross-sectional view along the BB direction.

[0048] Figure 10 This is a schematic diagram of Example 4 illustrating the meshing state between the screw teeth of the rubber ring and the teeth of the worm gear head.

[0049] Figure 11 This is a cross-sectional view of the overall structure of Example 4.

[0050] Figure 12 yes Figure 11 A magnified view of a section at point C.

[0051] Figure 13 This is a schematic diagram of existing technology.

[0052] Explanation of reference numerals in the attached drawings: 1. Housing; 2. Welding piece; 3. Spring piece; 4. Wire; 5. Locking mechanism; 6. Unclamping mechanism; 10. Connecting conductive structure; 11. Carrier; 12. Cover plate; 13. Mounting cavity; 131. Positioning protrusion; 132. Mounting post; 14. Insertion hole; 141. Receiving annular groove; 15. Limiting block; 16. Through hole; 17. Threaded hole; 20. Welding foot; 21. First baffle; 22. Second baffle; 221. Anti-slip groove; 23. Current-carrying main board; 231. Positioning hole; 24. Connecting plate; 25. Vertical plate; 251. First chamfer; 26. Clamping plate; 2 61. Second chamfer; 27. Accommodation area; 30. Groove; 31. Fixing part; 311. Slot; 312. Third chamfer; 32. Middle part; 33. Free part; 331. Avoidance slope; 332. Avoidance groove; 34. Concave transition section; 41. Rubber sleeve; 42. Rubber ring; 421. Threaded tooth; 422. Circular outline; 51. Connecting rod one; 52. Connecting rod two; 53. Rotating ring; 54. Arc plate; 541. Protrusion; 55. Limiting ball head; 56. Supporting arc plate; 57. Stop plate; 61. Screw; 62. Round screw head; 63. Sealing plug; 64. Worm gear head. Detailed Implementation

[0053] The following is in conjunction with the appendix Figure 1-12 This application will be described in further detail.

[0054] Example 1

[0055] Reference Figure 1 and Figure 2 The terminal block includes a housing 1 and a connecting conductive structure 10. The housing 1 includes a carrier 11 with a mounting cavity 13 and a cover plate 12 for closing the opening of the mounting cavity 13. The connecting conductive structure 10 enters the mounting cavity 13 through the opening of the mounting cavity 13, and the cover plate 12 closes the mounting cavity 13 to complete the overall installation. The connection between the cover plate 12 and the carrier 11 can be a snap-fit ​​connection, a pinhole mating connection, or an adhesive connection.

[0056] The conductive connection structure 10 is used to connect with an external circuit board, and the external wire 4 can pass through the insertion hole 14 provided in the carrier 11 to enter the mounting cavity 13. The wire 4 will be fixedly connected with the conductive connection structure 10. Through the conductive connection structure 10, the wire 4 is electrically connected to the external circuit board.

[0057] The carrier 11 is provided with a limiting block 15 at the outlet of the insertion hole 14, and the limiting block 15 is arranged opposite to the bottom of the mounting cavity 13.

[0058] like Figure 2 , Figure 3As shown, the conductive connection structure 10 includes a solder pad 2 and a spring sheet 3. The solder pad 2 includes a current-carrying main board 23. The two sides of the current-carrying main board 23 are respectively vertically bent to form a first baffle 21 and a second baffle 22. The first baffle 21 and / or the second baffle 22 are provided with solder feet 20. The solder feet 20 extend along the length direction of the solder pad 2. That is, depending on the actual application conditions, it is possible to select whether to process a single solder foot 20 or a double solder foot 20. In this embodiment, a double solder foot 20 structure is used.

[0059] The first baffle 21 and the current-carrying main board 23 are integrally connected by a connecting plate 24. The connecting plate 24 and the current-carrying main board 23 are located in the same plane. The connecting plate 24 is vertically bent on both sides along the width direction of the welding sheet 2 to form a vertical plate 25 and a clamping plate 26. The vertical plate 25 and the clamping plate 26 are integrally connected. The surface of the vertical plate 25 relative to the current-carrying main board 23 is higher than that of the clamping plate 26, so that an accommodating space is formed between the opposite surfaces of the vertical plate 25 and the first baffle 21.

[0060] A first chamfer 251 is provided at the junction between the end face of the upright plate 25 away from the current-carrying main board 23 and the side face of the upright plate 25 facing the first baffle 21. A second chamfer 261 is provided at the edge of the end face of the card plate 26 away from the current-carrying main board 23 along the width direction of the solder sheet 2.

[0061] When installing solder pad 2, first place solder pad 2 entirely into the mounting cavity 13. At this time, if... Figure 4 As shown, the opposite sides of the first baffle 21 and the second baffle 22, the end faces of the first baffle 21 and the second baffle 22, and the surface of the current-carrying main board 23 respectively abut or fit against the inner wall of the mounting cavity 13. Furthermore, the surfaces of the first baffle 21 and the second baffle 22 that are away from the current-carrying main board 23 are flush with the upper surface of the carrier 11. Therefore, when the cover plate 12 is closed, the cover plate 12 also limits the welding piece 2. In this way, the housing 1 is used to limit the welding piece 2 in multiple directions to reduce the shaking of the welding piece 2.

[0062] Furthermore, in order to further improve the positional accuracy of the solder pad 2, a positioning protrusion 131 can be provided at the bottom of the mounting cavity 13, and a positioning hole 231 is provided on the current-carrying main board 23. When the solder pad 2 is installed into the mounting cavity 13, the positioning hole 231 of the solder pad 2 cooperates with the positioning protrusion 131 of the carrier 11.

[0063] like Figure 3 , Figure 4 As shown, the spring 3 includes a fixed part 31, a middle part 32 and a free part 33 that are integrally formed and connected in sequence. The fixed part 31 and the free part 33 have an included angle. The middle part 32 is curved. The bottom of the mounting cavity 13 has a vertically formed mounting post 132. The middle part 32 is partially arranged around the mounting post 132. That is, through the cooperation between the middle part 32 and the mounting post 132, the position of the spring 3 is limited by the carrier 11, thereby reducing the large distance displacement of the spring 3.

[0064] Two slots 311 are provided on one long side of the fixing part 31, and the two slots 311 are provided one to one corresponding to the card plate 26. A third chamfer 312 is provided at the junction between the side of the fixing part 31 facing the current-carrying main board 23 and the groove wall of the slot 311, that is, the third chamfer 312 is located at the groove opening of the slot 311.

[0065] After the welding piece 2 is installed into the mounting cavity 13, the spring piece 3 can be installed. Specifically, the spring piece 3 is first compressed, forcing the fixing part 31 and the free part 33 closer together to reduce the space occupied by the spring piece 3. Then the spring piece 3 is lowered. During this process, the middle part 32 of the spring piece 3 cooperates with the mounting post 132. The fixing part 31 of the spring piece 3 first passes through the receiving space, and then uses the cooperation of the slot 311 and the card plate 26 to fix the lower half of the fixing part 31. The upper part of 1 is located in the accommodating space, that is, the upright plate 25 and the first baffle 21 together clamp and fix the upper part of the fixing part 31, thus completing the installation of the fixing part 31. In this process, by setting the first chamfer 251, the second chamfer 261 and the third chamfer 312, the fixing part 31 of the inserted spring piece 3 is guided in the two directions of the width and length of the welding piece 2, so as to correct the insertion path of the fixing part 31 and improve the insertion accuracy of the fixing part 31.

[0066] As the free part 33 moves downward as the spring 3 moves downward, it first enters the area between the first baffle 21 and the second baffle 22. After the spring 3 contacts the current-carrying main board 23, the spring 3 is released, allowing the free part 33 to return to its original shape. At this time, the free part 33 elastically abuts against the side of the second baffle 22 opposite to the first baffle 21. Furthermore, the limiting block 15 blocks the free part 33 from moving along the path away from the current-carrying main board 23. That is, the limiting block 15 prevents the free part 33 from detaching upward from the solder pad 2, thus completing the installation of the free part 33. Finally, the cover plate 12 is put on to complete the overall installation.

[0067] A clearance ramp 331 can also be provided on the side of the free part 33 away from the current-carrying main board 23, and the distance between the clearance ramp 331 and the current-carrying main board 23 gradually increases from the end of the free part 33 to the connection between the free part 33 and the middle part 32, so that the free part 33 is narrower, so that the free part 33 can avoid the limit block 15 during the installation of the spring 3, thus facilitating the installation of the spring 3.

[0068] When installing wire 4, one end of wire 4 passes through insertion hole 14 to enter mounting cavity 13. At this time, the free part 33 of spring piece 3 is forced to deform toward fixed part 31 to avoid wire 4. When wire 4 is located on one side of second baffle 22, the free part 33 of spring piece 3 returns to its original shape. The free part 33 of spring piece 3 and second baffle 22 together elastically clamp wire 4 to achieve the fixation of wire 4 and electrical connection between wire 4 and solder piece 2.

[0069] Furthermore, in order to increase the clamping stability of the wire 4, an anti-slip structure can be added between the second baffle 22 and the free part 33. For example, the side of the second baffle 22 opposite to the first baffle 21 is provided with multiple anti-slip grooves 221 arranged at intervals, and the anti-slip grooves 221 are inclined relative to the surface of the current-carrying main board 23. By setting the anti-slip grooves 221, the friction of the clamped wire 4 is increased, thereby improving the clamping stability.

[0070] Finally, to facilitate the later removal of the spring clip 3 from the solder pad 2, such as... Figure 4 As shown, the connection between the free part 33 and the middle part 32 is bent to form a concave transition section 34. The concave direction of the concave transition section 34 is set towards the first baffle 21 to form a clearance space, which is convenient for subsequent tools to be inserted into the clearance space to pry the free part 33 of the spring piece 3 toward the fixed part 31, thereby compressing the spring piece 3 so as to remove the spring piece 3 or release the clamping and fixing of the wire 4.

[0071] The implementation principle of Embodiment 1 is as follows: First, the first baffle 21 and the upright plate 25 jointly limit the first direction dimension of the fixing part 31, and the clamping plate 26 and the slot 311 cooperate to limit the second direction dimension of the fixing part 31, so as to comprehensively limit the upper part of the fixing part 31. Furthermore, by utilizing the elasticity of the metal welding sheet 2, the first baffle 21 and the upright plate 25 can clamp the other part of the fixing part 31 relative to the slot 311.

[0072] Secondly, the lower half of the fixing part 31 is limited by the cooperation of the upright card plate 26 and the card slot 311, and the contact area between the two is large, so the engagement is tighter.

[0073] Example 2

[0074] The difference between Example 2 and Example 1 is that, as Figure 5 As shown, multiple carriers 11 can be configured, and multiple carriers 11 are connected to each other by stacking. That is, the upper opening of the lower carrier 11 is closed by the bottom of the upper carrier 11, and a group of carriers 11 is closed by a cover plate 12, thereby simplifying the structure.

[0075] Example 3

[0076] The difference between Example 3 and Example 1 is that, as Figure 6 , Figure 7 , Figure 8 As shown, the wall of the insertion hole 14 is provided with a receiving annular groove 141, and a rubber ring 42 is placed in the receiving annular groove 141. The rubber ring 42 is coaxially arranged with the insertion hole 14 and is movably connected to the receiving annular groove 141. That is, the groove surface of the receiving annular groove 141 is set as a smooth surface, so that the rubber ring 42 can rotate around the axis of the insertion hole 14 within the receiving annular groove 141, so that the rubber ring 42 can rotate around its own circular outline 422; and the outer diameter part of the rubber ring 42 is exposed in the mounting cavity 13.

[0077] The housing 1 is equipped with a locking mechanism 5 and an unlocking mechanism 6, specifically, as follows: Figure 6 , Figure 7 As shown, the free part 33 has a clearance groove 332. The locking mechanism 5 includes an arc plate 54, a first connecting rod 51, a second connecting rod 52, and a limiting ball head 55 located in the mounting cavity 13. The first connecting rod 51 and the second connecting rod 52 are both located in a plane parallel to the current-carrying main board 23. The ends of the first connecting rod 51 and the second connecting rod 52 are fixed together, and there is an included angle between the first connecting rod 51 and the second connecting rod 52. The connection point of the first connecting rod 51 and the second connecting rod 52 is connected to a rotating ring 53, which is rotatably connected to the mounting post 132. The end of the first connecting rod 51 away from the second connecting rod 52 is fixedly connected to the arc plate 54. The curvature center of the arc plate 54 is the axis of the mounting post 132, and the outer convex arc surface of the arc plate 54 is tangent to the outer peripheral surface of the rubber ring 42.

[0078] The end of the second connecting rod 52 that is away from the first connecting rod 51 is fixedly connected to the limiting ball head 55, and the side wall of the free part 33 located at the relief groove 332 is provided with a bearing arc plate 56 for the limiting ball head 55 to abut.

[0079] like Figure 7 , Figure 9 As shown, the unclamping mechanism 6 includes two screws 61 arranged parallel to each other. The screws 61 are parallel to the axis of the insertion hole 14. A through hole 16 corresponding to the screws 61 and a sealing plug 63 for sealing the opening of the through hole 16 are provided on one outer side of the housing 1. The through hole 16 is connected to the mounting cavity 13 through a threaded hole 17, and part of the structure of the rubber ring 42 is exposed in the through hole 16. The screws 61 are located in the through hole 16. The middle part of the screws 61 is threadedly connected to the threaded hole 17. One end of the screws 61 extends into the space between the free part 33 and the second baffle 22. The other end of the screws 61 is fixed with a round screw head 62. The round screw head 62 is made of rubber and is tangential to the outer diameter of the rubber ring 42.

[0080] The implementation principle of Example 3 is as follows: When the wire 4 extends into the housing 1 through the insertion hole 14, firstly, the end of the wire 4 forces the free part 33 to deform towards the fixed part 31 to open the free part 33. Then, the end of the wire 4 is clamped by the second baffle 22 and the free part 33. Secondly, during the extension of the wire 4, the rubber sleeve 41 on the wire 4 also slides relative to the rubber ring 42. This sliding friction will cause the rubber ring 42 to rotate forward around its own circular outline 422, thereby causing the arc plate 54 to rotate forward around the axis of the mounting post 132 by a certain angle. Then, it will sequentially drive the connecting rod 1 51 and the connecting rod 2 52 to swing forward, thereby causing the limiting ball head 55 to move. When the free part 33 reaches the bearing arc plate 56, the angle between the connecting rod 52 and the free part 33 is less than 10°. Then, the limiting ball head 55 abuts against the bearing arc plate 56 to prevent the free part 33 from moving along its own length and toward the mounting post 132. In this way, the degree of freedom of the first half of the free part 33 is small, thereby increasing its rigidity and reducing the generation of deformation. This reduces the occurrence of the free part 33 easily deforming and detaching due to the forceful pulling out of the wire 4. Secondly, it reduces the degree of freedom of the entire free part 33 along its own length, that is, it reduces the clamping force on the end of the wire 4 due to the movement of the free part 33 caused by the overall loosening of the spring piece 3, thereby improving the clamping effect on the end of the wire 4.

[0081] When preparing to remove or replace wire 4, first rotate wire 4 in the opposite direction, and then use the friction between rubber sleeve 41 and rubber ring 42 to drive rubber ring 42 to rotate in the opposite direction around the axis of insertion hole 14. Rubber ring 42 then uses friction to drive round screw head 62 to rotate, thereby driving two screws 61 to extend into and enter between free part 33 and second baffle 22. Then screws 61 push free part 33 off wire 4 to release free part 33 from clamping the end of wire 4, and then wire 4 can be pulled out more easily.

[0082] Furthermore, when the wire 4 is pulled out, the sliding friction of the wire 4 on the rubber ring 42 will cause the rubber ring 42 to rotate in the opposite direction around its own circular outline 422, thereby causing the arc plate 54 to rotate in the opposite direction around the axis of the mounting column 132 by a certain angle, and then sequentially causing the connecting rod 1 51 and connecting rod 2 52 to swing in the opposite direction, thereby causing the limiting ball head 55 to move away from the bearing arc plate 56, so as to release the limitation on the free part 33.

[0083] In other words, by using the forward and reverse rotation and insertion and withdrawal movements of the wire 4, with the rubber ring 42 as an intermediary, and using two kinds of friction as driving forces, the locking mechanism 5 and the unlocking mechanism 6 are triggered respectively. This not only improves the clamping effect when clamping the wire 4, but also allows for quick and easy release of the clamp on the wire 4, so as to facilitate the removal or replacement of the wire 4. Furthermore, all of the above actions are completed within the housing 1 without interference from external structures, thus ensuring good sealing of the housing 1.

[0084] Example 4

[0085] The difference between Example 4 and Example 3 is that, as Figure 10 As shown, the surface of the rubber ring 42 has protruding screw teeth 421 spirally arranged around its own circular trajectory. The end of the screw 61 is fixed with a worm gear head 64 to replace the round screw head 62 in embodiment 3. The teeth of the worm gear head 64 are engaged with the screw teeth 421 of the rubber ring 42.

[0086] like Figure 11 , Figure 12 As shown, multiple protrusions 541 are arranged along their own arc direction on the outer convex arc surface of the arc plate 54. The protrusions 541 are used to engage in the gap between two adjacent screw teeth 421. A stop plate 57 is also integrally formed on one side of the arc plate 56. The stop plate 57 is used to prevent the limiting ball head 55 from continuing to move toward the rubber ring 42.

[0087] The implementation principle of Example 4 is as follows: When the wire 4 is inserted into the insertion hole 14, as the wire 4 extends further, the rubber ring 42 rotates forward around its own circular outline 422. The screw teeth 421 engage with the protrusions 541 of the arc plate 54, causing the arc plate 54 to swing forward. This locks the free part 33 (the limiting ball head 55 is located on the abutting arc plate 56, but the limiting ball head 55 does not abut against the stop plate 57), thus fixing the end of the wire 4. Then, the wire 4 is forced to extend a short distance into the housing 1. The arc plate 54 swings forward again, forcing the limiting ball head 55 to press against the stop plate 57. This clamping force forces the free part 33 to press even more tightly against the end of the wire 4, resulting in a very strong clamping force. Then, the wire 4 is forced to extend further into the housing 1. Since the end of the wire 4 is already stuck, it is difficult for the end of the wire 4 to continue advancing. Therefore, the remaining part of the wire 4 will bend (see reference). Figure 11 Even if the length of the wire 4 inside the housing 1 is large, the bending length is the subsequent extraction allowance. And since the limiting ball head 55 has reached the limit position, the arc plate 54, connecting rod 1 51, and connecting rod 2 52 cannot swing forward again. The reaction force prevents the rubber ring 42 from rotating forward around its own circular outline 422. Therefore, when it is extended, the wire 4 and the rubber ring 42 slide past each other, and the friction force is transmitted and rotated.

[0088] At this point, the length margin is used for subsequent insurance. For example, when an external force pulls the wire 4, this length margin will be consumed first, thereby reducing the possibility that the end of the wire 4 will be subjected to excessive force and break directly due to the external force pulling the wire 4. In addition, with the damping rubber ring 42, it can also absorb the energy of the external force to reduce the risk of breakage.

[0089] When the wire 4 needs to be pulled out, the pulling operation first consumes the length allowance of the wire 4, that is, the end position of the wire 4 does not change due to the pulling out of the wire 4. During this process, the pulling out of the wire 4 applies friction to the rubber ring 42. This sliding friction will cause the rubber ring 42 to rotate in the opposite direction around its own circular outline 422. Then, the cooperation between the rubber ring 42 and the arc plate 54 is used to release the lock on the free part 33. At the same time, the rubber ring 42 also engages with the teeth of the worm gear head 64 through its screw teeth 421, similar to a worm gear, to drive the worm gear head 64 to rotate, thereby driving the screw 61 to screw in. After the length allowance is pulled out, the screw 61 is just screwed in to push the free part 33 off the wire 4, thereby releasing the clamping of the free part 33 on the end of the wire 4. Then, the wire 4 can be pulled out again, which is more convenient. That is, only the wire 4 needs to be pulled out to complete the triggering of the clamping mechanism 6 and the unlocking mechanism 5, without rotating the wire 4, which is convenient and quick.

[0090] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A wiring terminal comprising a housing (1), a spring sheet (3) and a solder sheet (2) located in the housing (1), the solder sheet (2) comprising a current-carrying main plate (23), opposite sides of the current-carrying main plate (23) being respectively vertically bent to form a first baffle (21) and a second baffle (22), characterized in that: The first baffle (21) is connected with the current-carrying main plate (23) through the connecting plate (24), opposite sides of the connecting plate (24) are vertically bent to form the vertical plate (25), the vertical plate (25) and the first baffle (21) are bent towards the elastic sheet (3), one side of the vertical plate (25) close to the first baffle (21) is provided with the clamping plate (26), and a surface of the vertical plate (25) opposite to the current-carrying main plate (23) is higher than the clamping plate (26); the elastic sheet (3) comprises the fixed part (31), the intermediate part (32) and the free part (33) connected in sequence, the intermediate part (32) is connected with the shell (1), the fixed part (31) is located between the vertical plate (25) and the first baffle (21), and a side edge of the fixed part (31) is provided with the clamping groove (311) matched with the clamping plate (26); the free part (33) is used for elastically abutting against a side surface of the second baffle (22) opposite to the first baffle (21); the shell (1) is provided with the insertion hole (14) for inserting the wire (4) into the shell (1), a hole wall of the insertion hole (14) is provided with the accommodating ring groove (141), the rubber ring (42) is placed in the accommodating ring groove (141), the rubber ring (42) is movably connected with the accommodating ring groove (141), and the rubber ring (42) is coaxially arranged with the insertion hole (14); the shell (1) is provided with the locking mechanism (5), when the rubber ring (42) is turned, the locking mechanism (5) converts tangent friction force in a cross section direction of the rubber ring (42) into an acting force for limiting movement of the free part (33) along a length direction of the free part (33).

2. The terminal of claim 1, wherein: A first chamfer (251) is arranged at an intersection between an end surface of the vertical plate (25) away from the current-carrying main plate (23) and a side surface of the vertical plate (25) towards the first baffle (21).

3. The terminal of claim 1 or 2, characterized in that: A second chamfer (261) is arranged at an edge of an end surface of the clamping plate (26) away from the current-carrying main plate (23).

4. The terminal of claims 1 or 2, characterized in that: A third chamfer (312) is arranged at an intersection between a side surface of the fixed part (31) towards the current-carrying main plate (23) and a groove wall of the clamping groove (311).

5. The terminal of claim 1, wherein: The shell (1) is provided with the limiting stopper (15), the limiting stopper (15) is located on a side of the free part (33) away from the current-carrying main plate (23); when the free part (33) elastically abuts against a side surface of the second baffle (22) opposite to the first baffle (21), the limiting stopper (15) blocks a movement path of the free part (33) away from the current-carrying main plate (23).

6. The wiring terminal of claim 1, wherein: The shell (1) is provided with a mounting column (132), and the middle part (32) is in the shape of an arc and surrounds the mounting column (132); the locking mechanism (5) comprises an arc-shaped plate (54), a connecting rod one (51), a connecting rod two (52) and a limiting ball head (55), wherein the connecting rod one (51) and the connecting rod two (52) are fixed at their ends, and the connecting rod one (51) and the connecting rod two (52) are rotatably connected at their connecting position to the mounting column (132), the other end of the connecting rod one (51) is fixed to the arc-shaped plate (54), the center of curvature of the arc-shaped plate (54) is the axis of the mounting column (132), and the outer convex arc surface of the arc-shaped plate (54) is tangentially arranged on the outer circumferential surface of the rubber ring (42); the end of the connecting rod two (52) away from the connecting rod one (51) is fixedly connected to the limiting ball head (55), and the free part (33) is provided with a bearing arc plate (56) for abutting against the limiting ball head (55); when the free part (33) is deformed to clamp the wire (4), the included angle between the connecting rod two (52) and the free part (33) is less than 10°.

7. The terminal of claims 1 or 6, wherein: The shell (1) is provided with an unclamping mechanism (6), when the rubber ring (42) is reversely rotated around the axis of the insertion hole (14), the unclamping mechanism (6) converts the tangential friction force of the rubber ring (42) into a force for moving the free part (33) away from the second baffle (22).

8. The wiring terminal according to claim 7, characterized by: The unclamping mechanism (6) comprises two parallel screw rods (61), the screw rods (61) are threadedly connected to the shell (1), the screw rods (61) are parallel to the axis of the insertion hole (14), one end of the screw rod (61) is provided with a round screw head (62), the round screw head (62) is tangentially arranged on the outer diameter of the rubber ring (42), and the other end of the screw rod (61) extends into the free part (33) and the second baffle (22).

9. The terminal of claim 7 wherein: The surface of the rubber ring (42) is provided with helically arranged screw teeth (421); the unclamping mechanism (6) comprises two parallel screw rods (61), the screw rods (61) are threadedly connected to the shell (1), the screw rods (61) are parallel to the axis of the insertion hole (14), one end of the screw rod (61) is provided with a worm wheel head (64), the teeth of the worm wheel head (64) are meshingly arranged with the screw teeth (421) of the rubber ring (42), and the other end of the screw rod (61) extends into the free part (33) and the second baffle (22).

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