Improved mechanism of electric connector

Abstract

The utility model discloses an improved mechanism of an electric connector, which is characterized in that a wiring cavity is formed on the inner side of a plastic shell, a wire inlet and a screw inlet which are communicated with the wiring cavity are formed on the side wall of the plastic shell, a fixed terminal is fixed in the wiring cavity, and a pin of the fixed terminal extends out of the outer side of the plastic shell. A stud of the locking screw extends into the wiring cavity through a screw inlet in the plastic shell and can be in threaded connection with a threaded hole of the fixed terminal, the movable terminal contained in the wiring cavity is installed on the stud of the locking screw in an axial locking mode, and the movable terminal is stopped on the inner side wall of the wiring cavity. The movable terminal can move along the axial direction of the locking screw in the wiring cavity along with the locking screw, the movable terminal and the fixed terminal can clamp a wire entering the wiring cavity through the wire inlet, and an O-shaped ring on the wire can be sleeved on the outer side of a stud of the locking screw. And the situation that the locking screw is lost can be avoided.

Description

Technical Field

[0001] This utility model relates to an electrical connector, and more particularly to an improved mechanism for an electrical connector. Background Technology

[0002] Existing terminal block connectors for wiring use a screw stud that is screwed into the screw hole of the terminal. The screw stud is inserted into the O-ring at the end of the wire, and the O-ring of the wire is clamped by the screw head and the terminal surface, or the conductor of the bare wire is clamped directly by the screw head and the terminal surface to achieve a conductive connection between the wire and the connector. When wiring this type of connector, the screw needs to be completely unlocked. After unlocking, the screw is separated from the connector, which is easy to fall off and is not conducive to wire locking assembly. Utility Model Content

[0003] To overcome the above deficiencies, this utility model provides an improved mechanism for an electrical connector, which can prevent the screw from being separated from the connector during wire assembly and facilitate wire locking assembly.

[0004] The technical solution adopted by this utility model to solve its technical problem is: an improved mechanism for an electrical connector, including a plastic shell, a fixed terminal, a movable terminal, and a locking screw. A wiring cavity is formed inside the plastic shell, and an inlet communicating with the wiring cavity is formed on the side wall of the plastic shell. A screw inlet communicating with the wiring cavity is also provided on the side wall of the plastic shell. The fixed terminal is fixedly installed in the wiring cavity, and a pin extending out of the plastic shell is formed on the fixed terminal. The fixed terminal also has a threaded hole. The stud of the locking screw extends into the wiring cavity through the screw inlet on the plastic shell, and the stud of the locking screw can be screwed into the threaded hole of the fixed terminal. The movable terminal is axially stopped and installed on the stud of the locking screw. The movable terminal is accommodated in the wiring cavity and stopped on the inner side wall of the wiring cavity. The movable terminal can move axially along the locking screw within the wiring cavity. The movable terminal and the fixed terminal can clamp the wire entering the wiring cavity through the inlet. An O-ring on the wire can be sleeved on the outside of the stud of the locking screw.

[0005] As a further improvement of this utility model, an elastic element is also provided, which provides the movable terminal with an elastic restoring force in the direction away from the fixed terminal.

[0006] As a further improvement of this utility model, at least one side wall of the movable terminal is provided with a guide plate parallel to the locking screw stud. The elastic element is a compression spring, which is sleeved on the outside of the guide plate. One end of the compression spring abuts against the side of the movable terminal facing the fixed terminal, and the other end of the compression spring abuts against the inner wall of the fixed terminal or the wiring cavity.

[0007] As a further improvement of this utility model, the guide plate is provided with a stop step surface with increased width near the root of the fixed terminal, and the guide plate is also provided with a spring fixing structure with concave and convex shapes near the root of the fixed terminal. One end of the compression spring stops on the stop step surface, the coil of one end of the compression spring is accommodated in the groove of the spring fixing structure, and the protrusion of the spring fixing structure is inserted into the gap of the coil at one end of the compression spring.

[0008] As a further improvement of this utility model, the fixed terminal has a U-shaped structure, with a threaded hole formed on the bottom surface of the U-shaped structure. The pin is integrally formed on the ends of the two side walls of the U-shaped structure. The two side walls of the U-shaped structure have barbed structures. The wiring cavity side wall of the plastic shell has two parallel and spaced retaining holes. The two side walls of the U-shaped structure of the fixed terminal are tightly inserted into the two retaining holes. The barbed structures on the two side walls of the U-shaped structure of the fixed terminal are embedded in the side walls of the retaining holes. The pin passes through the retaining holes to the outside of the plastic shell.

[0009] As a further improvement of this utility model, the plastic shell is an integrally molded structure, and an assembly opening structure is formed on the side wall opposite to the side wall where the wiring cavity and the screw inlet are located. The pre-assembled structure formed by the fixed terminal, the movable terminal and the locking screw can be inserted into the wiring cavity through the assembly opening structure, and the locking screw and its head can be inserted into the screw inlet. The side walls opposite to the two retaining holes are connected to the assembly opening structure. A stop step is formed on the inner side wall of at least one retaining hole. A step surface with a reduced root width is formed on at least one side wall of the U-shaped structure of the fixed terminal. The step surface stops on the stop step on the inner side wall of the retaining hole, thereby limiting the depth of insertion of the fixed terminal from the assembly opening structure into the wiring cavity.

[0010] As a further improvement of this utility model, the side wall of the U-shaped structure of the fixed terminal is also provided with a bending stop wall extending towards the outside of the U-shaped structure. The other end of the compression spring is tightly pressed against the bending stop wall of the fixed terminal. An avoidance notch is formed in the middle of the bending stop wall, and the end of the guide piece of the movable terminal can be inserted into the avoidance notch.

[0011] As a further improvement of this utility model, the inner wall of the wiring cavity of the plastic shell is also provided with a compression spring guide receiving groove that matches the shape of the compression spring, and the compression spring is received in the compression spring guide receiving groove.

[0012] As a further improvement of this utility model, the inner wall of the wiring cavity of the plastic shell is provided with at least one guide groove extending along the axial direction of the locking screw, and the side wall of the movable terminal is provided with at least one outwardly protruding guide protrusion, which can be slidably inserted into the guide groove.

[0013] As a further improvement of this utility model, the neck of the locking screw is formed with a converging annular groove, the movable terminal is sleeved on the annular groove of the neck of the locking screw, and the movable terminal is stopped on the side wall of the annular groove along the axial direction of the locking screw. A spring washer is also sleeved in the annular groove of the neck of the locking screw. One end of the spring washer is tightly pressed against the head of the locking screw, and the other end of the spring washer is tightly pressed against the side of the movable terminal facing away from the fixed terminal. The side of the movable terminal facing the fixed terminal is also provided with protrusions for pressing the wire.

[0014] The beneficial technical effects of this utility model are as follows: By installing a movable terminal on the locking screw, the movable terminal clamps the wire while preventing the screw from coming off the plastic shell during wire removal, thus avoiding the loss of the locking screw. Furthermore, the utility model provides elastic restoring force to the movable terminal through an elastic element, ensuring that the movable terminal remains away from the fixed terminal after wire removal, facilitating smooth wire insertion during the next wiring process. The plastic shell of this utility model adopts an integrated structure, reducing manufacturing and assembly costs. This utility model has a simple structure, low product production cost, is easy to use, provides firm and stable wiring, and ensures stable PCB support and connection, preventing the product from easily detaching from the PCB during long-term use. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present utility model;

[0016] Figure 2 This is a perspective view of the present invention;

[0017] Figure 3 This is a schematic diagram of the wiring configuration of this utility model.

[0018] Figure 4 This is a schematic diagram of the structural principle of the unraveling state of this utility model;

[0019] Figure 5 This is a perspective view of the pre-assembled structure of this utility model;

[0020] Figure 6 This is a front view of the pre-assembled structure of this utility model;

[0021] Figure 7 This is a first perspective view of the fixed terminal of this utility model;

[0022] Figure 8 This is a second perspective view of the fixed terminal of this utility model;

[0023] Figure 9 This is a front view of the fixed terminal of this utility model;

[0024] Figure 10 This is a perspective view of the assembly structure of the locking screw and movable terminal of this utility model. Detailed Implementation

[0025] Example: An improved mechanism for an electrical connector includes a plastic housing 1, a fixed terminal 2, a movable terminal 3, and a locking screw 4. A wiring cavity 11 is formed inside the plastic housing 1. An inlet 12 communicating with the wiring cavity 11 is formed on the side wall of the plastic housing 1. A screw inlet 13 communicating with the wiring cavity 11 is also provided on the side wall of the plastic housing 1. The fixed terminal 2 is fixedly installed inside the wiring cavity 11. A pin 21 extending outward from the outside of the plastic housing 1 is formed on the fixed terminal 2. A threaded hole 22 is also provided on the fixed terminal 2. The stud of the locking screw 4 passes through the threaded hole 22 on the plastic housing 1. The screw inlet 13 extends into the wiring cavity 11, and the stud of the locking screw 4 can be screwed into the threaded hole 22 of the fixed terminal 2. The movable terminal 3 is axially stopped on the stud of the locking screw 4. The movable terminal 3 is accommodated in the wiring cavity 11 and stops on the inner side wall of the wiring cavity 11. The movable terminal 3 can move axially along the locking screw 4 in the wiring cavity 11 with the locking screw 4. The movable terminal 3 and the fixed terminal 2 can clamp the wire entering the wiring cavity 11 through the wire inlet 12. The O-ring on the wire can be sleeved on the outside of the stud of the locking screw 4.

[0026] When in use, the pins 21 of the fixed terminal 2 are soldered onto the circuit board, which can increase the current value of the product and improve the support strength of the product, ensuring the stability of the product. The fixed terminal 2 can withstand the downward positive pressure from the top of the locking screw 4 and can be transferred onto the PCB board. The movable terminal 3 is blocked by the inner wall of the wiring cavity 11 and cannot be dislodged from the screw inlet 13. Therefore, the locking screw 4 will not come off the plastic shell 1 after the wire is removed, thus avoiding the loss of the locking screw 4.

[0027] An elastic element is also provided, which provides an elastic restoring force to the movable terminal 3 in the direction away from the fixed terminal 2. The elastic element provides a restoring elastic force to the locking screw 4, which can make the locking screw 4 spring up vertically and freely, facilitating wiring to bare wires or O / Y terminals.

[0028] At least one side wall of the movable terminal 3 is provided with a guide plate 31 parallel to the stud of the locking screw 4. The elastic element is a compression spring 5, which is sleeved on the outside of the guide plate 31. One end of the compression spring 5 is pressed against the side of the movable terminal 3 facing the fixed terminal 2, and the other end of the compression spring 5 is pressed against the inner side wall of the fixed terminal 2 or the wiring cavity 11. The compression spring 5 is sleeved on the guide plate 31 to guide the elastic extension and contraction of the compression spring 5, and to prevent the lateral deformation of the compression spring 5 from affecting the normal wiring.

[0029] The guide plate 31 has a stop step surface 32 with increased width near the root of the fixed terminal 2. The guide plate 31 also has a spring fixing structure 33 with undulating edges near the root of the fixed terminal 2. One end of the compression spring 5 stops on the stop step surface 32, and the coil of one end of the compression spring 5 is accommodated in the groove of the spring fixing structure 33. The protrusion of the spring fixing structure 33 is inserted into the gap of the coil at one end of the compression spring 5. The undulating spring fixing structure 33 on the guide plate 31 can fix and position one end of the compression spring 5, preventing the compression spring 5 from moving within the wiring cavity 11.

[0030] The fixed terminal 2 has a U-shaped structure, with a threaded hole 22 formed on the bottom surface of the U-shaped structure. The pin 21 is integrally formed on the ends of the two side walls of the U-shaped structure. Barbed structures 23 are formed on the two side walls of the U-shaped structure. Two retaining holes 14 are provided parallel to each other on the side wall of the wiring cavity 11 of the plastic housing 1. The two side walls of the U-shaped structure of the fixed terminal 2 are tightly inserted into the two retaining holes 14. The barbs 23 on the side walls of the U-shaped structure of the fixed terminal 2 are embedded in the side walls of the retaining holes 14. The pin 21 protrudes through the retaining holes 14 to the outside of the plastic housing 1. The fixed terminal 2 adopts a U-shaped structure, and its two side walls are fixed in place by barbs within the retaining holes 14 on the side wall of the wiring cavity 11, ensuring a firm and stable fixation.

[0031] The plastic shell 1 is a one-piece molded structure. An assembly opening structure 15 is formed on the side wall opposite to the side wall where the wiring cavity 11 and the screw inlet 13 are located. The pre-assembled structure formed by the fixed terminal 2, the movable terminal 3 and the locking screw 4 can be inserted into the wiring cavity 11 through the assembly opening structure 15, and the locking screw 4 and its head can be inserted into the screw inlet 13. The side walls opposite to the two retaining holes 14 are connected to the assembly opening structure 15. A stop step is formed on the inner side wall of at least one retaining hole 14. A step surface (24) with a reduced root width is formed on at least one side wall of the U-shaped structure of the fixed terminal 2. The step surface stops on the stop step on the inner side wall of the retaining hole 14, thereby limiting the depth of insertion of the fixed terminal 2 from the assembly opening structure 15 into the wiring cavity 11. The plastic housing 1 adopts a one-piece plastic molding structure, which can reduce plastic parts, thereby reducing assembly steps and reducing costs. During assembly, the locking screw 4, which is equipped with the compression spring 5 and the movable terminal 3, is first pre-connected to the threaded hole 22 of the fixed terminal 2. Then, the pre-assembled structure, which integrates the fixed terminal 2, the locking screw 4, the movable terminal 3 and the compression spring 5, is inserted into the wiring cavity 11 through the assembly opening structure 15 at the bottom of the plastic housing 1. After being inserted into place, the locking screw 4 and its head just extend into the screw inlet 13. The two side walls of the U-shaped structure of the fixed terminal 2 are inserted into the two retaining holes 14 of the plastic housing 1, and the stepped surfaces on the two side walls of the U-shaped structure stop on the retaining steps formed on the inner side wall of the retaining hole 14. The barbs 23 on the two side walls of the U-shaped structure pierce into the flesh of the side wall of the retaining hole 14, realizing the fixed positioning of the fixed terminal 2 on the plastic housing 1. The above structure reduces the cost of the plastic housing 1 and improves the assembly efficiency, thereby reducing the assembly cost.

[0032] The fixed terminal 2 also has a bending stop wall 25 extending outward from the U-shaped structure sidewall. The other end of the compression spring 5 abuts against the bending stop wall 25 of the fixed terminal 2. An avoidance notch 26 is formed in the middle of the bending stop wall 25, and the end of the guide piece 31 of the movable terminal 3 can be inserted into the avoidance notch 26. The fixed terminal 2 adopts a metal stamping and bending integrated structure. Its bending stop wall 25 is formed by tearing and bending the U-shaped structure sidewall of the fixed terminal 2 on both sides of the pin 21. The torn part of the fixed terminal 2 serves as a spring support structure. The structure is simple and low cost. The torn part is flush with the bottom surface of the plastic shell 1. Under the locked force condition, the ends of the two side walls of the U-shaped structure of the fixed terminal 2 and the bottom surface of the bending stop wall 25 are in contact with the PCB surface, which can increase the support strength and prevent the terminal from coming out or moving under force.

[0033] The inner wall of the wiring cavity 11 of the plastic housing 1 is also provided with a spring guide receiving groove 16 that matches the shape of the spring 5, and the spring 5 is received in the spring guide receiving groove 16. The spring guide receiving groove 16 can accommodate and elastically deform and guide the spring 5 to avoid interference.

[0034] The inner wall of the wiring cavity 11 of the plastic housing 1 is provided with at least one guide groove 17 extending axially along the locking screw 4. The side wall of the movable terminal 3 is provided with at least one outwardly protruding guide protrusion 34, which is slidably inserted into the guide groove 17. During the up-and-down movement of the movable terminal 3 with the locking screw 4, the guide protrusion 34 slides up and down in the guide groove, playing a guiding role and preventing the movable terminal 3 from tilting and jamming during the up-and-down movement.

[0035] The neck of the locking screw 4 has a tapered annular groove. The movable terminal 3 is fitted onto the annular groove of the neck of the locking screw 4, and the movable terminal 3 stops against the side wall of the annular groove along the axial direction of the locking screw 4. A spring washer 6 is also fitted inside the annular groove of the neck of the locking screw 4. One end of the spring washer 6 is pressed tightly against the head of the locking screw 4, and the other end of the spring washer 6 is pressed tightly against the side of the movable terminal 3 facing away from the fixed terminal 2. The side of the movable terminal 3 facing the fixed terminal 2 also has a protrusion 35 for pressing the wire. The above structure allows the movable terminal 3 and the locking screw 4 to rotate relative to each other and make axial elastic contact, preventing the locking screw 4 from shaking. The protrusion 35 on the movable terminal 3 can also tightly press the wire and its O-ring to prevent poor contact.

Claims

1. An improved mechanism for an electrical connector, characterized in that: The device includes a plastic housing (1), a fixed terminal (2), a movable terminal (3), and a locking screw (4). A wiring cavity (11) is formed inside the plastic housing. An inlet (12) communicating with the wiring cavity is formed on the side wall of the plastic housing. A screw inlet (13) communicating with the wiring cavity is also provided on the side wall of the plastic housing. The fixed terminal is fixedly installed in the wiring cavity. A pin (21) extending outwards from the outside of the plastic housing is formed on the fixed terminal. A threaded hole (22) is also provided on the fixed terminal. The locking screw... The stud extends into the wiring cavity through the screw inlet on the plastic shell, and the stud of the locking screw can be screwed into the threaded hole of the fixed terminal. The movable terminal is axially stopped on the stud of the locking screw. The movable terminal is accommodated in the wiring cavity and is stopped on the inner side wall of the wiring cavity. The movable terminal can move axially along the locking screw in the wiring cavity with the locking screw. The movable terminal and the fixed terminal can clamp the wire entering the wiring cavity through the wire inlet. The O-ring on the wire can be sleeved on the outside of the stud of the locking screw.

2. The improved mechanism of the electrical connector according to claim 1, characterized in that: it further comprises an elastic element, the elastic element providing the movable terminal with an elastic restoring force in the direction away from the fixed terminal.

3. The improved mechanism of the electrical connector according to claim 2, characterized in that: at least one side wall of the movable terminal is provided with a guide plate (31) parallel to the locking screw stud, the elastic element is a compression spring (5), the compression spring is sleeved on the outside of the guide plate, one end of the compression spring is tightly against the side surface of the movable terminal facing the fixed terminal, and the other end of the compression spring is tightly against the inner wall of the fixed terminal or the wiring cavity.

4. The improved mechanism of the electrical connector according to claim 3, characterized in that: the guide plate is provided with a stop step surface (32) with increased width near the root of the fixed terminal, and the guide plate is also provided with a spring fixing structure (33) with concave and convex shapes near the root of the fixed terminal, one end of the compression spring is stopped on the stop step surface, the coil of one end of the compression spring is accommodated in the groove of the spring fixing structure, and the protrusion of the spring fixing structure is inserted into the coil gap of one end of the compression spring.

5. The improved mechanism of the electrical connector according to claim 3, characterized in that: the fixed terminal is U-shaped, the threaded hole is formed on the bottom surface of the U-shaped structure, the pin is integrally formed on the ends of the two side walls of the U-shaped structure, the two side walls of the U-shaped structure are provided with barbs (23), the wiring cavity side wall of the plastic shell is provided with two retaining holes (14) spaced parallel to each other, the two side walls of the U-shaped structure of the fixed terminal are tightly inserted into the two retaining holes, the barbs on the two side walls of the U-shaped structure of the fixed terminal are embedded in the side walls of the retaining holes, and the pin passes through the retaining holes to the outside of the plastic shell.

6. The improved mechanism of the electrical connector according to claim 5, characterized in that: the plastic shell is an integrally molded structure, and an assembly opening structure (15) is formed on the side wall opposite to the side wall where the wiring cavity and the screw inlet are located, the pre-assembled structure formed by the fixed terminal, the movable terminal and the locking screw can be inserted into the wiring cavity through the assembly opening structure, and the locking screw and its head can be inserted into the screw inlet, the side walls opposite to the two retaining holes are connected to the assembly opening structure, a stop step is formed on the inner side wall of at least one retaining hole, and a step surface (24) with a reduced root width is formed on at least one side wall of the fixed terminal U-shaped structure, the step surface stops on the stop step on the inner side wall of the retaining hole, thereby limiting the depth of the fixed terminal inserted from the assembly opening structure into the wiring cavity.

7. The improved mechanism of the electrical connector according to claim 5 or 6, characterized in that: a bending stop wall (25) extending outward toward the U-shaped structure sidewall of the fixed terminal is further provided, the other end of the compression spring abuts against the bending stop wall of the fixed terminal, and an avoidance notch (26) is formed in the middle of the bending stop wall, and the end of the guide piece of the movable terminal can be inserted into the avoidance notch.

8. The improved mechanism of the electrical connector according to claim 5, characterized in that: the inner wall of the wiring cavity of the plastic shell is further provided with a spring guide receiving groove (16) matching the shape of the spring, and the spring is received in the spring guide receiving groove.

9. The improved mechanism of the electrical connector according to claim 1, characterized in that: at least one guide groove (17) extending axially along the locking screw is provided on the inner side wall of the wiring cavity of the plastic housing, and at least one outwardly protruding guide protrusion (34) is provided on the side wall of the movable terminal, and the guide protrusion is slidably inserted into the guide groove.

10. The improved mechanism of the electrical connector according to claim 1, characterized in that: the neck of the locking screw has an annular groove with a reduced diameter, the movable terminal is sleeved on the annular groove of the neck of the locking screw, and the movable terminal is stopped on the side wall of the annular groove along the axial direction of the locking screw, a spring washer (6) is also sleeved in the annular groove of the neck of the locking screw, one end of the spring washer is tightly against the head of the locking screw, and the other end of the spring washer is tightly against the side of the movable terminal facing away from the fixed terminal, and the side of the movable terminal facing the fixed terminal is also provided with a protrusion (35) for pressing the wire.

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