Connector wiring terminal
By designing reverse bending edges and movable clamping surfaces on the conductive terminals, the problem of twisting and deformation of the contact walls of the conductive terminals is solved, and the stability of the electrical connection and cost control are achieved.
Patent Information
- Application Number
- CN202422552223.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-22
- Publication Date
- 2025-09-16
- Estimated Expiration
- 2034-10-22
AI Technical Summary
In the prior art, when thicker wires are connected, the contact wall of the conductive terminal is easily deformed due to twisting, resulting in unstable electrical connection and increased connector cost.
The conductive terminal adopts a reverse bent edge design. The screw end is tightly pressed against the reverse bent edge surface to avoid direct pressure on the contact wall. The movable clamping surface and fixed clamping surface are combined to clamp the wire, thereby enhancing the contact wall strength and ensuring a stable connection of the wire.
The strength of the contact wall of the conductive terminal is improved, the stability of the electrical connection is ensured, distortion is avoided, and the production cost of the connector is reduced.
Smart Images
Figure CN223348000U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a terminal block connector, in particular to a connector wiring terminal. Background Art
[0002] The screw-type terminal block is assembled from an insulating body 1, a screw 2, a conductive terminal 3, a wire pressing block 4, and an insulating bottom cover 5. The wire pressing block can rise and fall under the rotation of the screw, thereby clamping or loosening the wire 6.
[0003] One side of the contact wall 31 on the conventional conductive terminal contacts the wire to transmit current or electrical signals; the other side is pressed by the end face of the screw. Under the interaction between the screw and the wire pressing block, the terminal contact wall and the wire are pressed tightly to make an electrical connection.
[0004] In actual use, for the connection of thicker wires, when the torque for locking the wire is large, the two sides of the terminal contact wall are clamped by the wire and the screw end face. Due to the inconsistent force on both sides of the terminal contact wall, the wire is round and the contact with the terminal contact wall is linear, and the position is not necessarily centered; the screw end face is round, and the force is concentrated on the middle part of the terminal contact wall. In this way, when the locking torque is large, the terminal contact wall is prone to distortion, or due to the concentrated force on the screw end face, the middle part of the terminal contact wall expands outwards and presses against the inner wall of the wire pressing block. Then, when the wire needs to be removed or the wire needs to be repaired, the terminal contact wall and the inner hole of the wire pressing block will get stuck when the screw is loosened, making it impossible to loosen the wire pressing block smoothly. Furthermore, the distortion of the terminal contact wall will also reduce the quality of the electrical connection and reduce the stability of the connection.
[0005] In order to solve the above-mentioned problems and defects of the prior art, the industry also uses the method of thickening the wall thickness of the conductive terminal as a whole to increase the strength of the conductive terminal, but this invisibly increases the cost of the connector. Utility Model Content
[0006] In order to overcome the above-mentioned defects, the utility model provides a connector terminal, which can improve the contact wall strength of the conductive terminal and improve the stability of the wire connection.
[0007] The technical solution adopted by the present invention to solve its technical problems is as follows: a connector terminal, comprising an insulating shell, a screw, a wire pressing block and a conductive terminal, wherein a wiring cavity is provided inside the insulating shell, a wire inlet and a screw socket connected to the wiring cavity are provided on the side wall of the insulating shell, the extension direction of the wire inlet is perpendicular to the extension direction of the screw socket, the screw is rotatably installed in the screw socket in the circumferential direction, the wire pressing block can be linearly slidably installed in the wiring cavity of the insulating shell along the extension direction of the screw socket, a wiring channel extending in the same direction as the wire inlet is formed on the wire pressing block, and the wiring channel of the screw and the wire pressing block is perpendicular to the extension direction of the screw socket. The threaded hole on one side wall is movably screwed to drive the wire pressing block to slide linearly, and the inner surface of the other side wall of the wiring channel of the wire pressing block forms a movable wire clamping surface. The conductive terminal is fixedly connected to the insulating shell, and the contact wall at one end of the conductive terminal extends into the wiring channel of the wire pressing block. One side of the contact wall at one end of the conductive terminal forms a fixed wire clamping surface parallel to and opposite to the movable wire clamping surface. The wire entering through the wiring port can be tightly clamped between the movable wire clamping surface and the fixed wire clamping surface. One end of the conductive terminal is provided with a reverse bending edge covering the other side of the contact wall at one end of the conductive terminal, and the end of the screw can be tightly against the reverse bending edge surface.
[0008] As a further improvement of the present invention, one side surface of the reverse bent edge is flat against the other side surface of the contact wall at one end of the conductive terminal, and the end of the screw can be tightly against the other side surface of the reverse bent edge.
[0009] As a further improvement of the present invention, a convex point is provided on the other side surface of the contact wall at one end of the conductive terminal, and a socket is provided on the reverse bent edge, and the convex point can be tightly inserted into the socket.
[0010] As a further improvement of the present invention, the width of the reverse bending edge is smaller than the width of the contact wall, and a bending arc is formed between the root of the reverse bending edge and the end of one end of the conductive terminal.
[0011] As a further improvement of the present invention, a positioning arm is formed at the other end of the conductive terminal, and the positioning arm extends vertically to the contact wall to form an L-shaped structure. The end of the positioning arm forms a terminal welding foot, and an upper stop surface, a lower stop surface, a left stop surface, a right stop surface, a front stop surface and a rear stop surface are formed on the inside of the wiring cavity. The other side surface of the reverse bent edge of one end of the conductive terminal is tightly against the upper stop surface, and the end of the other end of the conductive terminal is tightly against the lower stop surface. The side walls around the conductive terminal positioning arm are tightly against the left stop surface, the right stop surface, the front stop surface and the rear stop surface respectively.
[0012] As a further improvement of the present invention, the fixed wire clamping surface is provided with a transverse embossing extending perpendicularly to the wire feeding direction.
[0013] As a further improvement of the present invention, the wire pressing block has a square structure, a square channel matching the shape of the wire pressing block is provided in the wiring cavity, a V-shaped groove is provided on the movable clamping surface of the wire pressing block, and the threaded hole on the wire pressing block intersects the V-shaped groove vertically.
[0014] As a further improvement of the present invention, a circle of radially inward-retracted annular stop steps and a circle of radially inward-retracted annular limiting protrusions are provided at intervals inside the screw socket. The step surface between the head of the screw and the stud stops on the side of the annular stop step facing away from the wiring cavity, and the head of the screw stops on the side of the annular limiting protrusion facing the wiring cavity. The annular limiting protrusion is connected to the inner side surface of the screw socket through an inclined transition.
[0015] As a further improvement of the present invention, the end of the screw is further provided with a radially shrunken and threadless pressing head, which is tightly against the reverse bent edge surface.
[0016] As a further improvement of the present invention, the insulating shell includes an insulating body and an insulating bottom cover, the wire inlet and the screw socket are both arranged on the side wall of the insulating body, and an open channel with one end smaller than the other end is formed in the insulating body, one end of the open channel is connected to the screw socket, and the insulating bottom cover can be inserted into the other end of the open channel, and an inverted protrusion is provided on the outer wall of the insulating cover plate, and a limiting slot is provided on the inner wall of the other end of the open channel of the insulating body, and the inverted protrusion on the insulating cover plate can be inserted into the limiting slot to realize a fixed connection between the insulating cover plate and the insulating body, and the open channel closed by the insulating bottom cover forms a wiring cavity.
[0017] The beneficial effect of the bobbin material blocking device of the present invention is as follows: the present invention forms a reverse bending edge covering the back of the contact wall by reverse bending at one end of the conductive terminal, and the reverse bending edge contacts the end of the screw, thereby effectively improving the strength of the contact wall of the conductive terminal, without changing the thickness of the raw material of the conductive terminal, and will not cause a significant increase in the production cost of the connector. When the locking torque is large, the terminal contact wall will not be twisted and deformed. Even if the end face of the screw is subjected to concentrated force, the middle part of the terminal contact wall will not expand toward the two outer sides, thereby avoiding interference with the wire pressing block. The utility model greatly improves the wiring stability, and wiring and wire withdrawal are smoother. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 This is a schematic diagram of the connector structure in the prior art.
[0019] Figure 2 A three-dimensional diagram of a conductive terminal in the prior art;
[0020] Figure 3 This is a three-dimensional cross-sectional view of the structural principle of the utility model;
[0021] Figure 4 This is a three-dimensional exploded diagram of the structural principle of the utility model;
[0022] Figure 5 This is a first stereoscopic view of the conductive terminal of the present invention;
[0023] Figure 6 This is a second three-dimensional view of the conductive terminal of the present invention;
[0024] Figure 7 This is a front view of the conductive terminal of the present utility model. DETAILED DESCRIPTION
[0025] Embodiment: A connector terminal comprises an insulating shell, a screw 2, a wire pressing block 4 and a conductive terminal 3, wherein a wiring cavity 11 is provided inside the insulating shell, and a wire inlet 12 and a screw socket 13 communicating with the wiring cavity 11 are provided on the side wall of the insulating shell, wherein the extension direction of the wire inlet 12 is perpendicular to the extension direction of the screw socket 13, the screw 2 is rotatably installed in the screw socket 13 in the circumferential direction, the wire pressing block 4 can be linearly slidably installed in the wiring cavity 11 of the insulating shell along the extension direction of the screw socket 13, a wiring channel 41 extending in the same direction as the wire inlet 12 is formed on the wire pressing block 4, and the screw 2 and the threaded hole on the side wall of the wiring channel 41 of the wire pressing block 4 are movable. The screw connection drives the wire pressing block 4 to slide in a straight line, and the inner surface of the other side wall of the wiring channel 41 of the wire pressing block 4 forms a movable wire clamping surface 42. The conductive terminal 3 is fixedly connected to the insulating shell, and the contact wall 31 at one end of the conductive terminal 3 extends into the wiring channel 41 of the wire pressing block 4. A side surface of the contact wall 31 at one end of the conductive terminal 3 forms a fixed wire clamping surface 32 parallel to and opposite to the movable wire clamping surface 42. The wire entering through the wiring port can be tightly clamped between the movable wire clamping surface 42 and the fixed wire clamping surface 32. One end of the conductive terminal 3 is provided with a reverse bending edge 33 covering the other side surface of the contact wall 31 at one end of the conductive terminal 3, and the end of the screw 2 can be tightly against the surface of the reverse bending edge 33.
[0026] When wiring, just need to insert the wire into the wiring channel 41 of the wire clamping block 4 through the wiring port. At this time, the wire is located between the fixed wire clamping surface 32 and the movable wire clamping surface 42. Turn the screw 2 to drive the wire clamping block 4 to move in a straight line. After the movable wire clamping surface 42 moves a certain distance toward the fixed wire clamping surface 32, the wire is clamped, and the wire and the conductive terminal 3 are electrically connected. In the process of rotating the screw 2, the end of the screw 2 is always tightly against the surface of the reverse bending edge 33, avoiding the screw 2 directly pressing against the contact wall 31 at one end of the conductive terminal 3, avoiding the contact wall 31 being compressed and deformed to affect the stable contact between the fixed wire clamping surface 32 and the wire, thereby ensuring the stability of the wiring.
[0027] One side of the reverse bent edge 33 lies flush against the other side of the contact wall 31 at one end of the conductive terminal 3, and the end of the screw 2 can abut against the other side of the reverse bent edge 33. The reverse bent edge 33 lies flush against the other side of the contact wall 31, creating a double-layer structure for the contact wall 31. This significantly increases the strength of the fixed clamping surface 32 of the conductive terminal 3, preventing deformation even under significant pressure from the screw 2.
[0028] A protrusion 34 is provided on the other side of the contact wall 31 at one end of the conductive terminal 3, and a socket 35 is provided on the reverse bent edge 33. The protrusion 34 can be tightly inserted into the socket 35. The protrusion 34 is formed on the contact wall 31, and the socket 35 is formed on the reverse bent edge 33. After the reverse bent edge 33 is folded in half, the protrusion 34 and the socket 35 are inserted into each other to achieve mutual alignment with the contact wall 31.
[0029] The width of the reverse bend 33 is smaller than the width of the contact wall 31, and a curved arc 36 is formed between the base of the reverse bend 33 and the end of one end of the conductive terminal 3. The width of the reverse bend 33 is smaller than the width of the contact wall 31. When the end face of the screw 2 acts on the reverse bend 33, even if the reverse bend 33 expands and deforms toward both sides, this avoidance design prevents the reverse bend 33 from getting stuck with the inner wall of the wiring channel 41 of the wire pressing block 4, thereby ensuring that the wire pressing block 4 can be smoothly locked and released. The contact wall 31 and the reverse bend 33 are connected by the curved arc 36, and the protrusion 34 and the socket 35 thereon form a single unit. When the wire is clamped, the double thickness and strength can effectively resist distortion during high torque locking, thereby improving the reliability of the electrical connection. The curved arc 36 between the contact arm and the reverse bend 33 can also guide the wire during insertion, ensuring smooth insertion of the wire.
[0030] The other end of the conductive terminal 3 forms a positioning arm, which extends perpendicularly from the contact wall 31 to form an L-shaped structure. The end of the positioning arm forms a terminal solder foot. The interior of the wiring cavity 11 is formed with an upper stop surface, a lower stop surface, a left stop surface, a right stop surface, a front stop surface, and a rear stop surface. The other side surface of the reverse bent edge 33 at one end of the conductive terminal 3 abuts the upper stop surface, and the end of the other end of the conductive terminal 3 abuts the lower stop surface. The side walls surrounding the positioning arm of the conductive terminal 3 abut the left stop surface, right stop surface, front stop surface, and rear stop surface, respectively. The terminal solder foot of the conductive terminal 3 can be soldered to the PCB for electrical connection.
[0031] The fixed wire clamping surface 32 is provided with a transverse embossing extending perpendicularly to the wire feeding direction. Providing the transverse embossing on the fixed wire clamping surface 32 of the contact wall 31 can increase the pulling force after the wire is locked.
[0032] The crimping block 4 has a square shape, and the wiring cavity 11 is provided with a square channel that matches the shape of the crimping block 4. The movable clamping surface 42 of the crimping block 4 is provided with a V-shaped groove 43, and the threaded hole on the crimping block 4 is perpendicularly intersected with the V-shaped groove 43. The V-shaped groove 43 on the movable clamping surface 42 of the crimping block 4 is deformed after tightening to clamp the screw, which is beneficial for self-locking and preventing the screw from loosening.
[0033] The screw socket 13 is provided with a radially inwardly contracted annular stop step 14 and a radially inwardly contracted annular retaining protrusion 15 at intervals. The step surface between the head of the screw 2 and the stud stops on the side of the annular stop step 14 facing away from the wiring cavity 11, and the head of the screw 2 stops on the side of the annular retaining protrusion 15 facing the wiring cavity 11. The annular retaining protrusion 15 and the inner side of the screw socket 13 are connected by an inclined transition. The annular stop step 14 can stop and support the head of the screw 2 to prevent damage to the conductive terminal 3. The annular retaining protrusion 15 has a relatively small inner protrusion height to block the head of the screw 2 and prevent the screw 2 from falling out of the screw socket 13.
[0034] The end of the screw 2 is also provided with a radially shrunken and non-threaded pressing head, which is pressed tightly against the surface of the reverse bent edge 33 .
[0035] The insulating shell includes an insulating body 1 and an insulating bottom cover 5. The wire inlet 12 and the screw socket 13 are both arranged on the side wall of the insulating body 1. An open channel with one end smaller than the other end is formed in the insulating body 1. One end of the open channel is connected to the screw socket 13. The insulating bottom cover 5 can be inserted into the other end of the open channel, and an inverted protrusion 51 is provided on the outer wall of the insulating cover. A limiting groove 16 is provided on the inner wall of the other end of the open channel of the insulating body 1. The inverted protrusion 51 on the insulating cover can be inserted into the limiting groove 16 to realize a fixed connection between the insulating cover and the insulating body 1. The open channel closed by the insulating bottom cover 5 forms a wiring cavity 11. The insulating shell with a split structure is convenient for assembly.
Claims
1. A connector terminal, comprising an insulating shell, a screw (2), a wire pressing block (4) and a conductive terminal (3), wherein a wiring cavity (11) is provided inside the insulating shell, a wire inlet (12) and a screw socket (13) communicating with the wiring cavity are provided on the side wall of the insulating shell, the wire inlet extending in a direction perpendicular to the screw socket extending in a direction, the screw is rotatably installed in the screw socket in a circumferential direction, the wire pressing block can be linearly slidably installed in the wiring cavity of the insulating shell along the direction in which the screw socket extends, and a wire pressing block is formed on the wire pressing block. The wire channel (41) is movably screwed to the threaded hole on one side wall of the wiring channel of the wire pressing block to drive the wire pressing block to slide linearly, and the inner surface of the other side wall of the wiring channel of the wire pressing block forms a movable wire clamping surface (42). The conductive terminal is fixedly connected to the insulating shell, and the contact wall (31) at one end of the conductive terminal extends into the wiring channel of the wire pressing block. A side surface of the contact wall at one end of the conductive terminal forms a fixed wire clamping surface (32) parallel to and facing the movable wire clamping surface. The wire entering through the wiring port can be tightly clamped between the movable wire clamping surface and the fixed wire clamping surface. The invention is characterized in that: One end of the conductive terminal is provided with a reverse bending edge (33) covering the other side surface of the contact wall of the one end of the conductive terminal, and the end of the screw can be tightly pressed against the surface of the reverse bending edge.
2. The connector terminal according to claim 1, wherein: One side surface of the reverse bent edge is flatly attached to the other side surface of the contact wall at one end of the conductive terminal, and the end of the screw can be tightly against the other side surface of the reverse bent edge.
3. The connector terminal according to claim 2, wherein: A convex point (34) is provided on the other side surface of the contact wall at one end of the conductive terminal, and an inserting hole (35) is provided on the reverse bent edge. The convex point can be tightly inserted into the inserting hole.
4. The connector terminal according to claim 2 or 3, characterized in that: The width of the reverse bending edge is smaller than the width of the contact wall, and a bending arc (36) is formed between the root of the reverse bending edge and the end of one end of the conductive terminal.
5. The connector terminal according to claim 2, wherein: A positioning arm is formed at the other end of the conductive terminal, and the positioning arm extends perpendicularly to the contact wall to form an L-shaped structure. A terminal welding foot is formed at the end of the positioning arm. An upper stop surface, a lower stop surface, a left stop surface, a right stop surface, a front stop surface and a rear stop surface are formed on the inside of the wiring cavity. The other side surface of the reverse bent edge of one end of the conductive terminal is tightly against the upper stop surface, and the end of the other end of the conductive terminal is tightly against the lower stop surface. The side walls around the conductive terminal positioning arm are tightly against the left stop surface, the right stop surface, the front stop surface and the rear stop surface respectively.
6. The connector terminal according to claim 1, wherein: The fixed wire clamping surface is provided with a transverse embossing extending perpendicularly to the wire feeding direction.
7. The connector terminal according to claim 1, wherein: The shape of the wire pressing block is a square structure, a square channel matching the shape of the wire pressing block is provided in the wiring cavity, a V-shaped groove (43) is provided on the movable clamping surface of the wire pressing block, and the threaded hole on the wire pressing block vertically intersects with the V-shaped groove.
8. The connector terminal according to claim 1, wherein: A circle of radially inwardly contracted annular stop steps (14) and a circle of radially inwardly contracted annular limiting convex ring (15) are provided in the screw socket at intervals. The step surface between the head of the screw and the stud stops on the side of the annular stop step facing away from the wiring cavity. The head of the screw stops on the side of the annular limiting convex ring facing the wiring cavity. The annular limiting convex ring is connected to the inner side surface of the screw socket through an inclined transition.
9. The connector terminal according to claim 1 or 8, characterized in that: The end of the screw is further provided with a pressing head with a radially shrunken size and no threads, and the pressing head is tightly pressed against the surface of the reverse bent edge.
10. The connector terminal according to claim 1, wherein: The insulating shell comprises an insulating body (1) and an insulating bottom cover (5), the line inlet and the screw socket are both arranged on the side wall of the insulating body, an open channel with one end smaller than the other end is formed in the insulating body, one end of the open channel is connected to the screw socket, the insulating bottom cover can be inserted into the other end of the open channel, and an inverted protrusion (51) is provided on the outer wall of the insulating cover plate, and a limiting card slot (16) is provided on the inner wall of the other end of the open channel of the insulating body, the inverted protrusion on the insulating cover plate can be inserted into the limiting card slot to realize the fixed connection between the insulating cover plate and the insulating body, and the open channel closed by the insulating bottom cover forms a wiring cavity.