Test wire connector

Abstract

The invention relates to the technical field of test wire joints, and discloses a test wire joint comprising a wiring unit used for connecting an external wire; the outer sleeve is arranged on the outer side of the wiring unit in a sleeving mode and moves in the axis direction of the wiring unit; the conduction unit is arranged in the wiring unit, and one end of the conduction unit is in contact with an external wire in the wiring unit; the device has the advantages that the conduction unit is controlled by controlling the movement of the outer sleeve, the head of a bolt in the junction box can be clamped, the bolt in the junction box and an external wire are communicated through the conduction unit, circuit detection in the junction box is ensured, a worker can conveniently connect a test end, and the test efficiency is improved. And through the cooperation of the outer sleeve and the conduction unit, the stable connection between the device and the test end can be ensured.

Description

Technical Field

[0001] This invention relates to the field of test line connector technology, and in particular to a test line connector. Background Technology

[0002] Currently, traditional terminal clamps are commonly used for connecting test leads in on-site testing of electrical energy meters. However, this method has obvious drawbacks: There are two main problems with using U-shaped connectors in current test circuits: First, there is the safety issue. Frequent use of screws to tighten the U-shaped connectors can easily lead to wear, expansion, and deformation of the inner side of the U-shaped connectors, which may eventually result in insufficient tightness or detachment of the connection, posing a risk of an open circuit in the current circuit. Second, there is the efficiency issue. Using U-shaped connectors requires tightening the screws twice to properly connect the test wiring, and the efficiency could be improved.

[0003] II. The main safety risk of alligator clips detaching when used in voltage test circuits is the risk of the alligator clips coming loose.

[0004] Therefore, existing technologies are not convenient for connection with screws, and are prone to springing off after connection. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is: the inconvenience of connecting to the test terminal and the instability of the connection.

[0006] The above-mentioned technical problems are solved by the following technical solution: The present invention proposes a test line connector, which includes a wiring unit for connecting external wiring; an outer sleeve, which is sleeved on the outside of the wiring unit and moves along the axial direction of the wiring unit; and a conductive unit, which is disposed inside the wiring unit, and one end of the conductive unit is in contact with the external wiring inside the wiring unit.

[0007] In a preferred embodiment of the test line connector of the present invention: the wiring unit includes a bearing cylinder, an inner cylinder fixed to the bottom of the bearing cylinder, and a first through hole opened in the radial direction of the inner cylinder. A fixing bolt is threaded in the first through hole, and the fixing bolt is used to fix the transmission unit inside the wiring unit.

[0008] In a preferred embodiment of the test line connector of the present invention: a threaded plate is uniformly fixedly connected to the top of the bearing cylinder, and a threaded cylinder is rotatably provided on the outer ring of the threaded plate. The threaded cylinder is threadedly engaged with the threaded plate, and the threaded plate is elastic.

[0009] In a preferred embodiment of the test line connector of the present invention: the threaded plate gradually thickens from one end near the top of the bearing cylinder to the end away from the bearing cylinder.

[0010] In a preferred embodiment of the test line connector of the present invention: the conductive unit includes a copper tube movably installed inside the bearing cylinder and at least two clamping arms movably installed at the bottom end of the copper tube. The copper tube has a second through hole in the radial direction, and the clamping arms have a third through hole. The second through hole and the third through hole are adapted to the first through hole and are connected by fixing bolts.

[0011] In a preferred embodiment of the test line connector of the present invention: the bottom of the copper tube is provided with an installation groove, the installation groove is inserted into the top of the clamping arm, the clamping arms are elastically connected by a spring, the bottom of the clamping arm is provided with a clamping part, and the clamping arm is slidably engaged with a retaining ring fixedly connected inside the outer sleeve.

[0012] In a preferred embodiment of the test line connector of the present invention: the first through hole and the second through hole are respectively opened on the central axis of the inner cylinder and the copper tube.

[0013] In a preferred embodiment of the test line connector of the present invention: the first through hole and the second through hole are respectively opened on one side of the central axis of the inner cylinder and the copper tube, so that one of the clamping arms is in a vertical state.

[0014] In a preferred embodiment of the test line connector of the present invention: a limiting component is provided in the outer sleeve, the limiting component including a placement groove opened in the outer sleeve, an extrusion plate that rotates in the placement groove via a rotating shaft, and a locking block located at the bottom end of the extrusion plate and extending toward the inside of the threaded cylinder; The outer side of the clamping arm is provided with a toothed plate, which engages with the locking block.

[0015] In a preferred embodiment of the test line connector of the present invention: the clamping part is provided with a through groove and a slot provided on the side wall of the through groove, an insert plate is slidably disposed in the through groove, and an insert piece is fixedly connected to the side of the insert plate. The insert piece and the slot are slidably engaged, wherein the slot and the insert piece are magnetically engaged.

[0016] The beneficial effects of this invention are as follows: by controlling the movement of the outer sleeve to control the transmission unit, the bolt head in the junction box can be clamped, and the bolt in the junction box and the external wiring can be connected through the transmission unit to ensure the circuit testing in the junction box, which facilitates the connection of the test terminal by the staff, and the stable connection between the device and the test terminal can be ensured through the cooperation of the outer sleeve and the transmission unit. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments of the present invention will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention. Wherein: Figure 1 A schematic diagram of the test line connector is shown; Figure 2 A schematic diagram of the exploded structure of the test line connector is shown; Figure 3 A front sectional view of the test line connector is shown; Figure 4 A cross-sectional view of a second method for connecting the test line is shown; Figure 5 Another structural cross-sectional view of the test line connector is shown; Figure 6 A schematic diagram of the clamping part is shown. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0019] The terminology used in this invention is that which is currently widely used in the art in consideration of the function of the invention; however, these terms may vary according to the intent of those skilled in the art, precedent, or new technology in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of the invention. Therefore, the terms used in this specification should not be construed as simple names, but rather based on their meanings and the overall description of the invention.

[0020] Example 1 Reference Figure 1 This is the first embodiment of the present invention. This embodiment provides a test wire connector, which includes a wiring unit 1 for connecting external wiring; an outer sleeve 2, which is sleeved on the outside of the wiring unit 1 and moves along the axial direction of the wiring unit 1; and a conductive unit 3, which is disposed inside the wiring unit 1, and one end of the conductive unit 3 is in contact with the external wiring inside the wiring unit 1.

[0021] The wiring unit 1 can be connected to the wiring of external testing equipment, ensuring the stability of the connection. The conduction unit 3 can achieve the conduction function, connecting a fastening screw in the junction box under test to the external testing equipment, ensuring that the power in the junction box can be detected. The operator can easily control the conduction unit 3 by controlling the outer sleeve 2, thereby achieving the fastening clamping of the bolt head in the junction box under test through the conduction unit 3, and ensuring its stability after clamping.

[0022] In the existing technology, the bolt heads commonly used in junction boxes are cylindrical, and the side of the head near the tail is rounded or chamfered. After the bolt is fixed, there is a certain gap between its bottom and the top of the corresponding position of the junction box. This gap allows the conductive unit 3 to be placed and partially inserted. The gap portion can cooperate with the conductive unit 3 to achieve stable clamping and ensure the stability of the connection.

[0023] Example 2 Reference Figures 1-3 This is the second embodiment of the present invention, which differs from the first embodiment in that it further includes a wiring unit 1 including a bearing cylinder 11, an inner cylinder 14 fixed to the bottom of the bearing cylinder 11, and a first through hole 141 opened in the radial direction of the inner cylinder 14. A fixing bolt 15 is threaded in the first through hole 141, and the fixing bolt 15 is used to fix the conduction unit 3 inside the wiring unit 1.

[0024] The supporting cylinder 11 serves to support the load, while the inner cylinder 14 connected to its bottom provides support for the outer cylinder 2 and cooperates with the outer cylinder 2 to realize the movement control of the outer cylinder 2. The first through hole 141 allows the fixing bolt 15 to be inserted and fixed. The first through hole 141 is opened radially along the central axis of the inner cylinder 14 and is located at the bottom end of the first through hole 141.

[0025] The inner ring of the inner cylinder 14 has the same size as the inner ring of the bearing cylinder 11. The outer ring diameter of the inner cylinder 14 is smaller than that of the bearing cylinder 11. The outer ring diameter of the outer sleeve 2 is the same as that of the bearing cylinder 11. This ensures the correct operation of the outer sleeve 2 while maintaining the cleanliness of the device exterior. The entire component of the wiring unit 1 is made of insulating material, and the fixing bolt 15 is made of conductive material with its head coated with insulating material to ensure the safe use of the device.

[0026] The first through hole 141 penetrates one side of the inner cylinder 14, but does not penetrate the other side of the inner cylinder 14. Figure 2 As can be clearly seen, the first through hole 141 is a circular groove on the other side of the inner cylinder 14 and does not penetrate through. This side is threaded with the tail end of the fixing bolt 15, which can fix the fixing bolt 15, thereby fixing the transmission unit 3.

[0027] The outer side of the first through hole 141 on the inner cylinder 14 is provided with a groove that matches the head of the fixing bolt 15. After the fixing bolt 15 is installed in the first through hole 141, the groove can allow the head of the fixing bolt 15 to be fully inserted, ensuring that it will not affect the normal operation of the outer cylinder 2.

[0028] Specifically, a threaded plate 12 is uniformly fixedly connected to the top of the bearing cylinder 11, and a threaded cylinder 13 is rotatably provided on the outer ring of the threaded plate 12. The threaded cylinder 13 is threadedly engaged with the threaded plate 12, and the threaded plate 12 is elastic.

[0029] Furthermore, the threaded plate 12 gradually thickens from one end near the top of the bearing cylinder 11 to the end away from the bearing cylinder 11.

[0030] Threaded plates 12 are evenly distributed on the top of the bearing cylinder 11. They are elastic and made of insulating material. The tail of the threaded plate 12 is threadedly engaged with the threaded cylinder 13. The threaded plate 12 gradually thickens from the end near the top of the bearing cylinder 11 to the end away from the bearing cylinder 11. The thickening here refers to the lateral width of the threaded plate 12. When the threaded cylinder 13 is rotated, it moves along the axis of the bearing cylinder 11 and away from the bearing cylinder 11. During the movement, multiple threaded plates 12 move closer to the center. As the threaded plates 12 continuously thicken during the process of moving closer, they can compress the wire and fix the wire.

[0031] Furthermore, the inner side of the threaded plate 12 is roughened to increase friction on the wires and make the wires more securely fixed.

[0032] Specifically, the transmission unit 3 includes a copper tube 31 movably installed inside the bearing cylinder 11 and at least two clamping arms 32 movably installed at the bottom end of the copper tube 31. The copper tube 31 has a second through hole 312 in the radial direction, and the clamping arms 32 have a third through hole 321. The second through hole 312 and the third through hole 321 are adapted to the first through hole 141 and are connected by fixing bolts 15.

[0033] Furthermore, the bottom of the copper tube 31 is provided with an installation groove 311, which is inserted into the top of the clamping arm 32. The clamping arms 32 are elastically connected by a spring 33. The bottom of the clamping arm 32 is provided with a clamping part 322, and the clamping arm 32 is slidably engaged with the retaining ring 21 fixedly connected inside the outer sleeve 2.

[0034] The second through hole 312 opened at the bottom of the copper tube 31 is also located on the central axis of the copper tube 31 and at the bottom of the second through hole 312, which can correspond to the first through hole 141. When the copper tube 31 is inserted from the bottom of the inner cylinder 14, and the direction of the second through hole 312 is the same as the direction of the first through hole 141, when the second through hole 312 is aligned with the first through hole 141, the fixing bolt 15 is inserted from the first through hole 141, and one end of it is inserted into a part of the second through hole 312, which does not reach the area of ​​the mounting groove 311, wherein the conductive unit 3 is made of conductive material.

[0035] Then, the ends of the two clamping arms 32 with the third through holes 321 are respectively inserted into the mounting grooves 311, and the third through holes 321 are aligned with the first through holes 141. Then, the fixing bolts 15 are inserted so that the fixing bolts 15 pass through the third through holes 321 to fix the clamping arms 32. Under the action of the spring 33, there is a thrust between the clamping arms 32, so that the two clamping arms 32 are in an open state and can rotate around the fixing bolts 15. The clamping arms 32 are fitted with the mounting grooves 311 and the fixing bolts 15.

[0036] Multiple clamping arms 32 can be provided, but at least two are provided. This embodiment uses two clamping arms 32 for explanation. When three clamping arms 32 are provided, three mounting slots 311 need to be opened and evenly distributed. The three slots form a triangle and do not extend to the middle of the copper tube 31. The bottom center of the copper tube 31 is solid and can extend downward into a triangular prism. Springs can be provided between the three surfaces of the prism and the clamping arms 32 respectively. When the outer sleeve 2 moves, it can also operate the three clamping arms 32 to move them closer to the center to clamp the screw head. Similarly, four clamping arms 32 can be provided, etc., without specific limitation here.

[0037] In this embodiment, the outer sleeve 2 and the inner sleeve 14 are threaded together. When the outer sleeve 2 is rotated, it can move along the axial direction of the inner sleeve 14, thereby pushing the clamping arm 32 to rotate inward through the retaining ring 21, thus achieving the clamping of the screw.

[0038] When assembling the device, firstly, the outer sleeve 2 is threaded into the inner sleeve 14, with the top of the outer sleeve 2 fitting against the bottom of the bearing sleeve 11. At this point, the bottom of the outer sleeve 2 is above the first through hole 141, which protrudes. Then, the copper tube 31 is inserted from the bottom of the inner sleeve 14. During insertion, the position of the second through hole 312 is aligned with the position of the first through hole 141. When the second through hole 312 is aligned with the first through hole 141, the fixing bolt 15 is inserted. At this point, one end of the fixing bolt 15 is partially inserted into the second through hole 312, but does not reach the mounting groove 311. To prevent interference with the insertion of the clamping arm 32, the two clamping arms 32 are then connected by the spring 33, and the two clamping arms 32 are inserted into the two mounting slots 311 respectively. After the third through hole 321 is aligned with the first through hole 141, the fixing bolt 15 is inserted into the first through hole 141 and rotated to make it threaded into the first through hole 141 to ensure the stability of the fixing bolt 15. Then, the outer sleeve 2 is rotated and moves downward. When the retaining ring 21 contacts the outer side of the clamping arm 32, it squeezes the clamping arm 32, causing the two clamping arms 32 to move closer to the middle. When connecting external wiring, insert the external wiring from the top of the threaded plate 12. When the wiring contacts and fits against the top of the clamping arm 32, rotate the threaded cylinder 13 to fix it through the threaded plate 12 to ensure stable operation of the device. During testing, place the screw attachment to be clamped on the device, then rotate the outer sleeve 2 to move it downwards. The retaining ring 21 squeezes the clamping arm 32, causing the clamping arm 32 to move towards the center. During this movement, the screw head is clamped. Once the clamping is stable, stop rotating the outer sleeve 2. Due to the stability of the threaded engagement and the pushing force exerted by the spring 33 and the clamping arm 32 on the outer sleeve 2, the outer sleeve 2 will not rotate on its own, ensuring the stability of the device.

[0039] Example 3 Reference Figure 4 This is the third embodiment of the present invention. The difference between this embodiment and the second embodiment is that this embodiment also includes a limiting component 22 provided in the outer sleeve 2. The limiting component 22 includes a placement groove 221 opened in the outer sleeve 2, a pressing plate 222 that rotates in the placement groove 221 via a rotating shaft 223, and a locking block 224 located at the bottom end of the pressing plate 222 and extending toward the inside of the threaded cylinder 13. A toothed plate 323 is provided on the outer side of the clamping arm 32, and the toothed plate 323 engages with the locking block 224. In this embodiment, the retaining ring 21 may not be provided, or the retaining ring 21 may be provided at the bottom end of the outer sleeve 2. In the position where the retaining ring 21 is not provided on the inner side of the outer sleeve 2, a sliding groove is provided, and a slider is provided on the corresponding outer side of the inner sleeve 14. The sliding groove and the slider slide together to restrict the movement of the outer sleeve 2, so that it can only move up and down.

[0040] The upper end of the extrusion plate 222 protrudes outward from the outer side of the outer sleeve 2, making it easy for the operator to press. The rear of the extrusion plate 222 has space for the upper end to move, ensuring the normal operation of the device. A torsion spring is provided at the rotational connection between the extrusion plate 222 and the rotating shaft 223 to ensure the stable engagement of the locking block 224 and the toothed plate 323.

[0041] When in use, place the device on top of the screw and operate it with one hand. Hold the threaded plate 12 and push the outer sleeve 2 with two fingers to move the outer sleeve 2 downward. During the downward movement, the bottom of the outer sleeve 2 will continuously squeeze the clamping arm 32. At this time, due to the setting of the torsion spring, the squeezing plate 222 will shake. After moving the outer sleeve 2 to stably clamp the screw head, stop pushing. At this time, under the action of the locking block 224 and the torsion spring, it will engage with the toothed plate 323. At this time, even if the spring 33 has an outward pushing force, it can ensure the stability of the clamping. During disassembly, simply press the top of the two compression plates 222 with one hand. At this time, the locking block 224 will disengage from the toothed plate 323, allowing the outer sleeve 2 to be pulled upward, causing the clamping arm 32 to open outward and release the clamp on the screw head.

[0042] The rest of the structure is the same as in Example 2.

[0043] Example 4 Reference Figure 5 This is the fourth embodiment of the present invention. Unlike the second embodiment, this embodiment also includes a first through hole 141 and a second through hole 312 respectively opened on one side of the central axis of the inner cylinder 14 and the copper tube 31, so that one of the clamping arms 32 is in a vertical state.

[0044] like Figure 4 As shown, the first through hole 141 and the second through hole 312 are not opened on the central axis, but on one side. After the two clamping arms 32 are installed, one of them is in a vertical state, and the clamping arm 32 in the vertical state can also be fixed in this position by other means to keep it still, while the other clamping arm 32 rotates around the fixing bolt 15. When the outer sleeve 2 is rotated, the retaining ring 21 squeezes the rotatable clamping arm 32, and the retaining ring 21 should also be set at the same time. At this time, the outer side of the vertically set clamping arm 32 can be modified to make its thickness smaller, so as to ensure that the retaining ring 21 can squeeze the rotatable clamping arm 32 when it is rotated, without colliding with the vertical clamping arm 32, thus ensuring the normal operation of the device. This can be set according to the specific use conditions, and no specific limitation is made here.

[0045] The clamping part 322 of the rotatable clamping arm 32 can be slightly elastic. Since the clamping arm 32 rotates around the fixing bolt 15 as the center, its movement trajectory may collide with the top of the junction box. The slightly elastic setting can prevent this from happening and can also stably clamp the screw head.

[0046] Furthermore, the installation positions of the first through holes 141 and 313 in this embodiment are also applicable to the content of embodiment 3. When applying the content of embodiment 3: When setting limit components 22 on the sides of the two clamping arms 32, the length of the locking block 224 and the cooperation between the locking block 224 and the toothed plate 323 need to be considered to ensure that it can be implemented stably.

[0047] In this embodiment, when clamping the screw head, the vertical clamping arm 32 can be positioned to fit against the screw head. Then, the outer sleeve 2 is controlled to squeeze the clamping arm 32 and move it closer to the screw. Once the clamping arm 32 clamps the screw, the operation on the outer sleeve 2 is stopped. This can prevent both clamping arms 32 from moving towards the middle during operation, which could lead to unstable control and collision with the screw, potentially generating an electric arc.

[0048] The rest of the structure is the same as in Example 2.

[0049] Example 5 Reference Figure 6 This is the fifth embodiment of the present invention. Unlike the second embodiment, this embodiment further includes a clamping part 322 with a through groove 322a and a slot 322b formed on the side wall of the through groove 322a. An insert plate 322c is slidably disposed in the through groove 322a. An insert piece 322d is fixedly connected to the side of the insert plate 322c. The insert piece 322d is slidably engaged with the slot 322b, wherein the slot 322b and the insert piece 322d are magnetically engaged.

[0050] The through slot 322a allows for the replacement of the insert plate 322c, and the opening on the insert plate 322c is arc-shaped to accommodate cylindrical screws; the opening on the insert plate 322c is V-shaped to accommodate hex bolts, etc., and other shapes can also be provided, which are not specifically limited here.

[0051] The slot 322b is located on the side wall of the through slot 322a for the insert 322d to slide. The insert 322d and the slot 322b are magnetically attached, which makes it easy to replace the insert plate 322c, allowing it to accommodate more screws and expand its application scenarios. The magnetic attachment is made of a conductive material to ensure the normal operation of the device.

[0052] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of the present invention.

Claims

1. A test lead connector, characterized in that: include, Wiring unit (1) is used to connect external wiring; The outer sleeve (2) is fitted onto the outside of the wiring unit (1) and moves along the axial direction of the wiring unit (1); The conductive unit (3) is disposed inside the wiring unit (1), and one end of the conductive unit (3) is in contact with the external wiring inside the wiring unit (1).

2. The test line connector according to claim 1, characterized in that: The wiring unit (1) includes a bearing cylinder (11), an inner cylinder (14) fixed to the bottom of the bearing cylinder (11), and a first through hole (141) opened in the radial direction of the inner cylinder (14). A fixing bolt (15) is threaded in the first through hole (141), and the fixing bolt (15) is used to fix the transmission unit (3) inside the wiring unit (1).

3. The test line connector according to claim 2, characterized in that: The top of the bearing cylinder (11) is uniformly fixedly connected with a threaded plate (12), and a threaded cylinder (13) is rotatably provided on the outer ring of the threaded plate (12). The threaded cylinder (13) is threadedly engaged with the threaded plate (12), and the threaded plate (12) is elastic.

4. The test line connector according to claim 3, characterized in that: The threaded plate (12) gradually thickens from one end near the top of the bearing cylinder (11) to the end away from the bearing cylinder (11).

5. The test line connector according to claim 3 or 4, characterized in that: The transmission unit (3) includes a copper tube (31) movably installed inside the bearing cylinder (11) and at least two clamping arms (32) movably installed at the bottom end of the copper tube (31). The copper tube (31) has a second through hole (312) in the radial direction, and the clamping arms (32) have a third through hole (321). The second through hole (312) and the third through hole (321) are adapted to the first through hole (141) and are connected by fixing bolts (15).

6. The test line connector according to claim 5, characterized in that: The bottom of the copper tube (31) is provided with an installation groove (311), which is inserted into the top of the clamping arm (32). The clamping arms (32) are elastically connected by a spring (33). The bottom of the clamping arm (32) is provided with a clamping part (322). The clamping arm (32) is slidably connected to the retaining ring (21) fixedly connected inside the outer sleeve (2).

7. The test line connector according to claim 6, characterized in that: The first through hole (141) and the second through hole (312) are respectively opened on the central axis of the inner cylinder (14) and the copper tube (31).

8. The test line connector according to claim 6, characterized in that: The first through hole (141) and the second through hole (312) are respectively opened on one side of the central axis of the inner cylinder (14) and the copper tube (31), so that one of the clamping arms (32) is in a vertical state.

9. The test line connector according to claim 7 or 8, characterized in that: The outer sleeve (2) is provided with a limiting component (22), the limiting component (22) includes a placement groove (221) opened in the outer sleeve (2), an extrusion plate (222) that rotates in the placement groove (221) via a rotating shaft (223), and a locking block (224) located at the bottom end of the extrusion plate (222) and extending toward the inside of the threaded cylinder (13). The outer side of the clamping arm (32) is provided with a toothed plate (323), which engages with the locking block (224).

10. The test line connector according to claim 9, characterized in that: The clamping part (322) has a through groove (322a) and a slot (322b) on the side wall of the through groove (322a). A plate (322c) is slidably disposed in the through groove (322a). A piece (322d) is fixedly connected to the side of the plate (322c). The piece (322d) slides with the slot (322b), and the slot (322b) and the piece (322d) are magnetically attracted to each other.

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