A new type of test wire clamp

Abstract

A novel test wire clamp includes a test wire clamp body, comprising a first clamp body and a second clamp body arranged vertically. The first clamp body has a segmented, bendable structure, consisting of a first working part and a first handle part connected by a first connecting part. The second clamp body is a straight, elongated structure, with the second working part located on the side closest to the first working part and the second handle part on the other side. The first working part is connected to the second working part via a pin, and the first and second handle parts are connected by a second connecting part with a spring. A first working head and a second working head are respectively provided at the ends of the first and second working parts. A standard interface for connecting test wires is also connected to the side of the second handle part away from the second working part. This invention has many advantages, including simple structure, firm fixation, and multiple functions.

Description

Technical Field

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

[0002] Alligator clips, used as temporary circuit connectors, are widely applied in industries such as power, electronics, automotive, telecommunications, and medical. A typical alligator clip includes a handle, clips, a rotating pin, and a torsion spring. The torsion spring is mounted on the rotating pin. Two clips are hinged together by the rotating pin. The two ends of the torsion spring press against the two clips, creating a biting force on the serrated clips to easily clamp test terminals or other protruding components.

[0003] In circuit connection or related tests, the test lead is usually first connected to the socket at the end of the alligator clip, and then the alligator clip is clamped onto the conductor of the test object to complete the connection. In the ring main unit of the distribution network, due to the compact structure and full insulation of the cabinet, exposed conductors or power cable heads inside the T-type plug-in cavity are not conducive to the clamping operation of existing test clamps (alligator clips), and sometimes the alligator clips fall off. Therefore, a new type of test clamp is designed to overcome the above problems. Summary of the Invention

[0004] The purpose of this invention is to provide a novel test clamp that is simple in structure, firmly fixed, and versatile in function. The novel test clamp designed in this invention has a first working head that extends into the threaded joint of the ring main unit. When the test clamp is released, the first and second working heads spring back under the action of springs, ensuring that the first working head is stably fixed after passing through the hole or extending into the threaded cavity. Furthermore, this invention also includes an installation and disassembly port, making its overall functionality more diverse.

[0005] This invention is achieved through the following technical solution: a novel test clamp, comprising a test clamp body, which includes a first clamping body and a second clamping body arranged vertically. The first clamping body is a segmented, bendable structure, consisting of a first working part and a first handhold, connected by a first connecting part. The second clamping body is a straight, elongated structure, with the second working part located on one side near the first working part and the second handhold on the other side. The first working part is connected to the second working part via a pin, and the first handhold and the second handhold are connected by a second connecting part with a spring. The end of the working part is respectively provided with a first working head and a second working head. The first working head and the second working head are symmetrical to each other and have an outwardly extending L-shaped structure. By pressing the second hand-held part with the hand clamp handle, the distance between the first working head and the second working head is reduced until they are tightly pressed together. They are then inserted into the circular hole or threaded cavity connector. When the hand-held part is released, the first working head and the second working head rebound under the action of the spring, the distance between them increases, and they engage with the threads on the inner walls of the two sides of the circular hole or the inner walls of the two sides of the threaded cavity connector. This is used to achieve the engagement and fixation between the test clamp and different test samples. A standard interface for connecting test leads is provided on the side of the second hand-held part away from the second working part.

[0006] Preferably, the first connecting part consists of a protruding limiting block and an elliptical through hole at the intersection of the first working part and the first hand-held part. The protruding limiting block is located at the tail of the first working part, and the elliptical through hole is located on the end of the first hand-held part near the first working part and is arranged obliquely. The protruding limiting block is inserted into the elliptical through hole and can slide obliquely within the elliptical through hole. When the first working part is pressed by hand, the protruding limiting block moves obliquely downward, and the spring is in a compressed state. The distance between the first working head and the second working head decreases until they are close together, and the first working head and the second working head can extend into the circular hole or threaded cavity connector. When the hand-held part is released, the protruding limiting block moves obliquely upward, and the first working head and the second working head rebound and the distance between them increases under the action of the spring, engaging with the threads on the inner walls of both sides of the threaded connector, thereby realizing the engagement and fixation between the test clamp and the circular hole or threaded cavity connector.

[0007] Preferably, the first working head and the second working head are symmetrical L-shaped long metal strips, which are respectively embedded in the mounting grooves provided on the opposite outer surfaces of the first working part and the second working part. The first working head and the second working head form the clamps when the test clamp is working.

[0008] Preferably, the first working part and the second working part are provided with at least one symmetrical arc-shaped notch on the left and right sides of the pin shaft on their relatively inner sides. Each arc-shaped notch has a toothed structure on its inner sidewall. When the hand-held part is pressed, the first working part and the second working part are pressed together, and the arc-shaped notches of the first working part and the second working part are joined together to form an installation and disassembly port for easy disassembly and installation of bolts.

[0009] Preferably, the first and second hand-held parts are fitted with detachable clamps on their outer sides, and a plurality of protruding particles are evenly arranged on the outer wall of the clamps, which form an anti-slip layer to increase the friction force of the hand when pressing; the clamps are insulated clamps.

[0010] Compared with the prior art, the present invention has the following advantages:

[0011] The novel test clamp designed in this invention has a different fixing method than the existing alligator clips. By inserting the first and second working heads into the circular hole or threaded cavity connector of the ring main unit, the test clamp is released. The first and second working heads rebound under the action of springs, and both the first and second working heads are engaged and fixed with the threads inside the threaded connector. This internal engagement fixing method is more stable than the single-sided clamping fixing method. In addition, the test clamp is also provided with an installation and removal port for easy installation and removal of bolts, making the overall function of this invention more versatile. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0013] Figure 2 This is a top view of the present invention.

[0014] Figure 3 This is a side view of the present invention. Detailed Implementation

[0015] To enable those skilled in the art to more clearly understand the purpose, technical solution, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0016] In the description of this invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", "lateral", and "vertical" is based on the orientation or positional relationship shown in the accompanying drawings and is only for the convenience of describing this invention, and is not intended to indicate or imply that the device or component referred to must have a specific orientation, and therefore should not be construed as a limitation of this invention.

[0017] The invention will now be described in detail with reference to the accompanying drawings: Figure 1As shown, a novel test clamp includes a test clamp body 1, which comprises a first clamping body 2 and a second clamping body 7 arranged vertically. The first clamping body 2 is a segmented, bendable structure, consisting of a first working part 4 and a first handhold part 5, connected by a first connecting part 6. The second clamping body 7 is a straight, elongated structure, with a second working part 8 on one side near the first working part 4 and a second handhold part 9 on the other side. The first working part 8 is connected to the second working part 9 via a pin 3, and the first handhold part 5 and the second handhold part 9 are connected by a second connecting part 12 with a spring 11. The end of part 8 is respectively provided with a first working head 13 and a second working head 14. The first working head 13 and the second working head 14 are symmetrical to each other and have an outwardly extending L-shaped structure. When the second hand-held part 9 is pressed by holding the handle, the distance between the first working head 13 and the second working head 14 decreases until they are tightly pressed together. After being inserted into the threaded connector, the handle is released, and the first working head 13 and the second working head 14 rebound under the action of the spring, the distance increases, and they engage with the threads on the inner walls of both sides of the threaded connector, which is used to realize the engagement and fixation between the test clamp and the threaded connector of the ring main unit. A standard interface 10 for connecting test wires is also connected to the side of the second hand-held part 9 away from the second working part 8. The spring of the present invention is consistent with the spring structure of the existing alligator clip and is a torsion spring.

[0018] The novel test clamp designed in this invention differs from existing alligator clips in its fixing method. By inserting the first and second working heads into the circular hole or threaded cavity connector of the ring main unit, the test clamp is released. The first and second working heads spring back under spring pressure, and both engage with the threads inside the threaded connector for fixation. This internal engagement fixing method is more stable than single-sided clamping. To further enhance the fixation, a reverse tooth can be provided at the end of the first working head to prevent it from retracting, thus providing better protection against detachment.

[0019] The first connecting part 6 consists of a protruding limiting block 15 and an elliptical through hole 16 at the intersection of the first working part 4 and the first handheld part 5. The protruding limiting block 15 is located at the tail of the first working part 4, and the elliptical through hole 16 is located on the end of the first handheld part 5 near the first working part 4 and is arranged obliquely. The protruding limiting block 15 is inserted into the elliptical through hole 16 and can slide left and right within the elliptical through hole 16. When the first working part 4 is pressed by hand, the protruding limiting block 15 moves obliquely downward, and the spring is in a compressed state. The distance between the first working head 13 and the second working head 14 decreases until they are close together. The first working head 13 and the second working head 14 can extend into the interior of the circular hole or threaded cavity connector. When the handheld part is released, the protruding limiting block 15 moves obliquely upward, and the first working head 13 and the second working head 14 rebound under the action of the spring, increasing the distance between them and engaging with the threads on the inner walls of the circular hole or threaded cavity connector on both sides. This is used to achieve the engagement and fixation between the test clamp and the circular hole or threaded cavity connector.

[0020] The first connecting part designed in this invention is connected by a point between the protruding limiting block and the elliptical through hole. The angle of the first working part is adjusted by adjusting the position of the first hand-held part, thereby easily realizing the insertion of the first working head and the second working head into the threaded joint of the ring main unit and the engagement of the first working head and the second working head with the threads on the inner walls of the threaded joint on both sides.

[0021] The first working head 13 and the second working head 14 are mutually symmetrical L-shaped long metal strips, which are respectively embedded in the mounting grooves 21 provided on the opposite outer surfaces of the first working part 4 and the second working part 8. The first working head 13 and the second working head 14 form the clamps when the test wire clamp is working. The first working head and the second working head of the present invention can be made of stainless steel.

[0022] The first working part 4 and the second working part 8 have at least one symmetrical arc-shaped notch 17 on their inner sides on the left and right sides of the pin 10. Each arc-shaped notch 17 has a toothed structure 18 on its inner wall. When the hand-held part is pressed, the first working part 4 and the second working part 8 are pressed together, and the arc-shaped notches 17 of the first working part 4 and the second working part 8 are joined to form an installation / disassembly port for easy removal and installation of bolts. To facilitate understanding of the structure of the invention, a top view and a side view are provided, as shown below. Figure 2-3 As shown.

[0023] The test clamp of the present invention is also provided with an installation and removal port for easy installation and removal of bolts, which makes the overall function of the present invention more diverse and convenient for users.

[0024] The first hand-held part 5 and the second hand-held part 9 are fitted with a detachable clamp 19 on their outer sides. Multiple protruding particles 20 are evenly arranged on the outer side wall of the clamp 19. The protruding particles 20 form an anti-slip layer to increase the friction force of the hand when pressing. The clamp 19 is an insulated clamp.

[0025] The present invention has a detachable clamping handle sleeved on the outer side of the first and second hand parts, and multiple protruding particles are evenly arranged on the outer wall of the clamping handle to increase the friction force of the hand when pressing, thereby preventing the hand from slipping and making it easier to press the first hand part. The clamping handle is made of insulating material, which can better protect the user's life safety from injury.

[0026] The working principle of this invention is as follows:

[0027] The fundamental principle of this invention is to use the structure of springs and connecting rods to provide the mechanism with a reverse expansion force, so that it is clamped at the copper lug of the cable head to be tested. This fixing method is more stable, and it is generally led out to the conventional φ4mm plug for withstand voltage testing.

[0028] The test clamp of the present invention is normally in a relaxed state with the front opening wide open. During use, the front opening narrows when the handle is squeezed. When placed in a suitable position, the handle is released to complete the clamping. The flanges of the first and second working heads can be about 3mm to ensure that they play a limiting role and prevent the test clamp from falling off after clamping.

[0029] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A novel test clamp, comprising a test clamp body (1), the test clamp body (1) comprising a first clamping body (2) and a second clamping body (7) arranged vertically, characterized in that: The first clamp (2) is a segmented, bendable structure, consisting of a first working part (4) and a first handheld part (5), which are connected by a first connecting part (6). The second clamp (7) is a straight, elongated structure, with the second working part (8) on one side of the second clamp (7) closest to the first working part (4) and the second handheld part (9) on the other side. The first working part (8) is connected to the second working part (8) by a pin (3), and the first handheld part (5) and the second handheld part (9) are connected by a second connecting part (12) with a spring (11). A first working head (13) and a second working head (14) are respectively provided at the ends of the first working part (4) and the second working part (8). The working head (14) is a symmetrical L-shaped structure extending outward between the first working head (13) and the second working head (14). By pressing the second hand-held part (9) with the hand-held clamp handle, the distance between the first working head (13) and the second working head (14) is reduced until they are close to each other. After that, they are inserted into the circular hole or threaded cavity connector. When the hand-held part is released, the first working head (13) and the second working head (14) rebound under the action of the spring, the distance between them increases, and they engage with the threads on the inner walls of the circular hole or threaded cavity connector on both sides. This is used to achieve the engagement and fixation between the test clamp and different test samples. A standard interface (10) for connecting test wires is also connected on the side of the second hand-held part (9) away from the second working part (8).

2. The novel test clamp according to claim 1, characterized in that: The first connecting part (6) consists of a protruding limiting block (15) and an elliptical through hole (16) at the intersection of the first working part (4) and the first hand-held part (5). The protruding limiting block (15) is located at the tail of the first working part (4), and the elliptical through hole (16) is located on the end of the first hand-held part (5) near the first working part (4) and is arranged obliquely. The protruding limiting block (15) is inserted into the elliptical through hole (16) and can slide obliquely within the elliptical through hole (16). After the first working part (4) is pressed by hand, the protruding limiting block (15)... When the spring moves diagonally downward, it is in a compressed state. The gap between the first working head (13) and the second working head (14) narrows until they are close together. The first working head (13) and the second working head (14) can be inserted into the circular hole or threaded cavity connector. When the hand is released, the protruding limiting block (15) moves diagonally upward. The first working head (13) and the second working head (14) rebound and the gap increases under the action of the spring. They engage with the threads on the inner walls of the circular hole or threaded cavity connector on both sides to achieve the engagement and fixation between the test clamp and the circular hole or threaded cavity connector.

3. The novel test clamp according to claim 2, characterized in that: The first working head (13) and the second working head (14) are mutually symmetrical L-shaped long metal strips, which are respectively embedded in the mounting grooves (21) provided on the opposite outer surfaces of the first working part (4) and the second working part (8). The first working head (13) and the second working head (14) form the clamps when the test clamp is working.

4. The novel test clamp according to claim 3, characterized in that: The first working part (4) and the second working part (8) are provided with at least one symmetrical arc-shaped notch (17) on the left and right sides of the pin (10) respectively. A toothed structure (18) is provided on the inner wall of each arc-shaped notch (17) so that when the first hand-held part (5) is pressed, the first working part (4) and the second working part (8) are pressed together and the arc-shaped notches (17) of the first working part (4) and the second working part (8) are joined together to form an installation and disassembly port for easy disassembly and installation of bolts.

5. The novel test clamp according to claim 4, characterized in that: The first hand-held part (5) and the second hand-held part (9) are fitted with a detachable clamp (19). Multiple protruding particles (20) are evenly arranged on the outer wall of the clamp (19). The protruding particles (20) form an anti-slip layer to increase the friction force of the hand when pressing. The clamp (19) is an insulated clamp.

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