Kelvin test clip

Abstract

The utility model discloses a Kelvin test clamp, which relates to the technical field of electronic test, and comprises a test assembly which comprises two symmetrically arranged handles, the two handles are rotatably connected through a fixed shaft, a connecting part is fixed at the end part of each handle, a movable block is arranged at the end part of each connecting part, and a clamping plate is fixed at the end part of each movable block; and the adjusting assembly is arranged in the connecting part and the clamping plate and comprises a fastening bolt in threaded connection to one side of the connecting part, a connecting groove is formed in the connecting part, an adjusting plate is fixed to one side of the movable block, and a limiting plate slides in the connecting groove. According to the utility model, the length of the clamping end can be adjusted through the arrangement of the adjusting assembly, so that the test clamp can adapt to various test environments, meanwhile, the stability of clamping the element to be tested can be improved, and the condition of accidental falling off can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to electronic testing technical field, especially a kind of kelvin test clamp. BACKGROUND

[0002] In the field of electronic testing, Kelvin test is a kind of high-precision measurement technology, especially suitable for low resistance measurement, by eliminating the contact resistance and wire resistance in the test process, provide more accurate measurement results, Kelvin test uses four contact points to carry out resistance measurement, traditional two-end measurement mode can introduce error due to the resistance of test wire or contact point, and Kelvin test avoids this error by separating current guide and voltage measurement path, specifically, Kelvin test uses two terminals to transmit current, and the other two terminals measure voltage, ensure that the path of current and voltage is completely independent, thereby eliminating the influence of wire resistance, the length of the end head clamping part in the Kelvin test clamp in the prior art is mostly fixed, and for some test environments where the to-be-tested element is deep and there are many obstacles nearby, it is difficult to clamp the to-be-tested element well, which affects the test efficiency, and it only plays the effect of anti-skid through sawtooth, and the test clamp is easy to fall off from the to-be-tested element due to external force and other unexpected situations during testing, which affects the test result. SUMMARY

[0003] This section aims to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the abstract of the specification and the utility model name to avoid obscuring the purpose of this section, the abstract of the specification and the utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0004] In view of the above and / or existing problems in Kelvin test clamp, the utility model is proposed.

[0005] Therefore, the problem to be solved by the utility model is that the length of the end head clamping part in the Kelvin test clamp in the prior art is mostly fixed, and for some test environments where the to-be-tested element is deep and there are many obstacles nearby, it is difficult to clamp the to-be-tested element well, which affects the test efficiency, and it only plays the effect of anti-skid through sawtooth, and the test clamp is easy to fall off from the to-be-tested element due to external force and other unexpected situations during testing, which affects the test result.

[0006] To solve the above technical problems, the utility model provides technical scheme as follows: A kind of kelvin test clamp, it includes, test component, including two handles of symmetrical arrangement, rotation is connected between the two by fixed shaft, handle end is fixed with connecting part, connecting part end is provided with movable block, movable block end is fixed with clamping plate;And, adjusting component is set in the connecting part and clamping plate, including fastening bolt being connected in the one side of connecting part, connecting groove is opened in the connecting part, adjusting plate is fixed in the one side of movable block, limit plate is slid in the connecting groove, the one end of adjusting plate is fixed with limit plate, first blocking piece is arranged between the two movable blocks, clamping piece is arranged in the clamping plate, second blocking piece is arranged in the end of clamping plate.

[0007] As a preferred scheme of the utility model described kelvin test clamp, wherein: the first blocking piece includes slider, rectangular slot is opened in the movable block, slider is slid in rectangular slot, flexible rod is fixed in the one side of slider, and active pipe is sleeved between the two flexible rods.

[0008] As a preferred scheme of the utility model described kelvin test clamp, wherein: the first blocking piece further includes fixed block fixed to the end of flexible rod, first spring is fixed to the one side of fixed block, and first spring is located in active pipe.

[0009] As a preferred scheme of the utility model described kelvin test clamp, wherein: first limit block is fixed in the inside of rectangular slot opening.

[0010] As a preferred scheme of the utility model described kelvin test clamp, wherein: the clamping piece includes movable plate, mounting groove is opened in the clamping plate, movable plate is slid in mounting groove, and sawtooth is fixed to the outside of movable plate.

[0011] As a preferred scheme of the utility model described kelvin test clamp, wherein: the clamping piece further includes second limit block fixed to the opening of mounting groove.

[0012] As a preferred scheme of the utility model described kelvin test clamp, wherein: the clamping piece further includes second spring fixed to the inside of movable plate, and the other end of second spring is in contact with the inner wall of mounting groove.

[0013] As a preferred scheme of the utility model described kelvin test clamp, wherein: the second blocking piece includes connecting plate fixed to the end of movable plate, middle hole is opened in the clamping plate, side hole is opened in the two sides of middle hole and communicated with middle hole, first piston is slid in middle hole and is fixed to the end of connecting plate, second piston is slid in side hole, and connecting rod is fixed to the one side of second piston.

[0014] In a preferred embodiment of the Kelvin test clip of this utility model, the second blocking member further includes a magnet fixed to the end of the connecting rod.

[0015] In a preferred embodiment of the Kelvin test clip of this utility model, the adjusting plate is provided with a scale on one side, and the end of the fastening bolt is fixed with a handle.

[0016] The beneficial effects of this utility model are as follows: the length of the clamping end can be adjusted by adjusting the setting of the adjustment component, so that the test clamp can adapt to a variety of test environments. At the same time, it can improve the stability of clamping the component under test and avoid accidental drop. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0018] Figure 1 This is a structural diagram of the Kelvin test clip.

[0019] Figure 2 This is a cross-sectional view of the adjustment components of the Kelvin test clip.

[0020] Figure 3 Another view of the adjustment components of the Kelvin test clip.

[0021] Figure 4 This is a structural diagram of the adjustment plate of the Kelvin test clip.

[0022] Figure 5 This is a cross-sectional view of the second stop of the Kelvin test clamp.

[0023] Figure 6 This is a structural diagram of the clamping components of the Kelvin test clip. Detailed Implementation

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0027] Example 1

[0028] Reference Figure 1 and Figure 3 This is the first embodiment of the present invention. This embodiment provides a Kelvin test clip, which includes a test component 100 and an adjustment component 200. The test component 100 can perform test operations on the component to be tested, and the adjustment component 200 can improve the overall applicability and stability of the test clip.

[0029] Specifically, the test assembly 100 includes two symmetrically arranged handles 101, which are rotatably connected by a fixed shaft 102. A return spring (not shown in the figure) is provided between the two handles 101 to facilitate the reset of the two handles 101. The position and number of the springs can be set as needed by those skilled in the art, and will not be described in detail here. A connecting part 103 is fixed to the end of the handle 101, and a movable block 104 is provided at the end of the connecting part 103. A clamping plate 105 is fixed to the end of the movable block 104. This part is the basic principle part of the Kelvin test clip. Its wiring, working principle and usage precautions are all existing technology, which can be clearly understood by those skilled in the art, and will not be described in detail here.

[0030] The adjusting assembly 200 is disposed within the connecting part 103 and the clamping plate 105. It includes a fastening bolt 201 threadedly connected to one side of the connecting part 103. A connecting groove S is provided in the connecting part 103. An adjusting plate 202 is fixed to one side of the movable block 104. When it is necessary to adjust the length of the clamping plate 105, the clamping plate 105 and the adjusting plate 202 are manually pulled to move them to the appropriate position. Then, the fastening bolt 201 is rotated. The end of the fastening bolt 201 may be provided with a material such as rubber to increase friction, thereby fixing the position of the adjusting plate 202 and the clamping plate 105. A limiting plate 203 slides in the connecting groove S. One end of the adjusting plate 202 is fixed to the limiting plate 203. The limiting plate 203 is used to limit the adjusting plate 202 and the clamping plate 105 to prevent them from detaching from the connecting groove S.

[0031] A first blocking member 204 is provided between the two movable blocks 104, a clamping member 205 is provided inside the clamping plate 105, and a second blocking member 206 is provided at the end of the clamping plate 105. The first blocking member 204 and the second blocking member 206 are used to block the component to be tested held by the clamping member 205 to prevent it from falling off during the testing process. Their materials and working principles are existing technologies, and those skilled in the art can set them as needed.

[0032] Example 2

[0033] Reference Figures 1-6 This is the second embodiment of the present invention, which is based on the previous embodiment.

[0034] Specifically, the first blocking member 204 includes a slider 204a. A rectangular groove K is provided in the movable block 104. The slider 204a slides in the rectangular groove K. The slider 204a is shorter than the length of the rectangular groove K. When the two handles 101 and the clamping plate 105 perform clamping actions, the slider 204a will slide in the rectangular groove K because the two movable blocks 104 move away from or closer to each other, thereby playing a certain role in limiting and guiding, and improving the stability of clamping.

[0035] A flexible rod 204b is fixed on one side of the slider 204a. A movable tube 204c is sleeved between the two flexible rods 204b. The flexible rods 204b slide inside the movable tube 204c. The two flexible rods 204b can extend the distance between the two movable blocks 104. The flexible rods 204b and the movable tube 204c can block the element to be tested, preventing it from slipping off or shifting from the clamping plate 105.

[0036] The first blocking member 204 also includes a fixing block 204d fixed to the end of the flexible rod 204b, with a first spring 204e fixed on one side. The first spring 204e is located inside the movable tube 204c, and a first limiting block 204f is fixed inside the opening of the rectangular groove K. The flexible rod 204b is limited by the fixing block 204d and the first limiting block 204f to prevent it from detaching from the movable tube 204c. The first spring 204e applies a force to the flexible rod 204b to move it into the movable tube 204c, making it easier to reset.

[0037] The clamping member 205 includes a movable plate 205a, and a mounting groove M is provided in the clamping plate 105. The movable plate 205a slides in the mounting groove M. A serration 205b is fixed on the outside of the movable plate 205a. The movable plate 205a can move in the mounting groove M. When the component to be tested is located between the two movable plates 205a, it will push the serration 205b and the movable plate 205a into the mounting groove M to adapt to components of different diameters. At this time, the serration 205b improves the clamping effect and friction of the component to be tested, thereby improving its stability. The clamping member 205 also includes a second limiting block 205c fixed at the opening of the mounting groove M, which is used to limit the movable plate 205a and make it disengage from the mounting groove M.

[0038] The clamping member 205 also includes a second spring 205d fixed inside the movable plate 205a, the other end of which contacts the inner wall of the mounting groove M. It applies a force to the movable plate 205a away from the mounting groove M, thereby further increasing the clamping force when clamping the component to be measured, thus making the clamping stability higher.

[0039] The second blocking member 206 includes a connecting plate 206a fixed to the end of the movable plate 205a. It is L-shaped, with a groove at the top of the mounting groove M for sliding. A central hole H1 is formed in the clamping plate 105, and two side holes H2 communicating with it are formed on both sides. Two side holes H2 are symmetrically arranged, and their ends communicate with the central hole H1. A first piston 206b slides in the central hole H1 and is fixed to the end of the connecting plate 206a. A second piston 206c slides in the side holes H2. A connecting rod 206d is fixed to one side of the second piston 206c. When the element to be measured is clamped by the movable plate 205a, the movable plate... 205a moves into the mounting slot M, thereby driving the first piston 206b to move via the connecting plate 206a. This compresses the air in the central hole H1 and the side hole H2, pushing the second pistons 206c and the connecting rod 206d on both sides closer together. This reduces the opening between the two clamping plates 105, preventing the test clamp from falling off if the component under test accidentally slides or falls off the serrations 205b. This greatly improves the convenience and stability of the test. The first piston 206b and the second piston 206c are sealed around their perimeter to prevent gas leakage during movement, which would affect the movement effect.

[0040] The second blocking component 206 also includes a magnet 206e fixed to the end of the connecting rod 206d. The two magnets 206e will attract each other when they are close together, thereby further improving the blocking effect of the two connecting rods 206d. The adjusting plate 202 has a scale on one side, which makes it convenient for the staff to observe the length of the two clamping plates 105 when adjusting the length of the adjusting plate 202, so as to keep them consistent. The end of the fastening bolt 201 is fixed with a handle 207, which is used to facilitate the staff to rotate the fastening bolt 201.

[0041] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A Kelvin test clip, characterized in that: include, The test assembly (100) includes two symmetrically arranged handles (101) rotatably connected by a fixed shaft (102). A connecting part (103) is fixed to the end of each handle (101), and a movable block (104) is provided at the end of each connecting part (103). A clamping plate (105) is fixed to the end of each movable block (104). An adjustment component (200) is disposed in the connecting part (103) and the clamping plate (105), including a fastening bolt (201) threaded to one side of the connecting part (103), a connecting groove (S) is provided in the connecting part (103), an adjustment plate (202) is fixed to one side of the movable block (104), a limit plate (203) slides in the connecting groove (S), one end of the adjustment plate (202) is fixed to the limit plate (203), a first blocking member (204) is provided between the two movable blocks (104), a clamping member (205) is provided in the clamping plate (105), and a second blocking member (206) is provided at the end of the clamping plate (105).

2. The Kelvin test clip as described in claim 1, characterized in that: The first blocking member (204) includes a slider (204a), and a rectangular groove (K) is provided in the movable block (104). The slider (204a) slides in the rectangular groove (K). A flexible rod (204b) is fixed on one side of the slider (204a), and a movable tube (204c) is sleeved between the two flexible rods (204b).

3. The Kelvin test clip as described in claim 2, characterized in that: The first blocking member (204) also includes a fixing block (204d) fixed to the end of the flexible rod (204b), and a first spring (204e) is fixed on one side of the first spring (204e) located inside the movable tube (204c).

4. The Kelvin test clip as described in claim 3, characterized in that: A first limiting block (204f) is fixed inside the opening of the rectangular groove (K).

5. The Kelvin test clip as described in claim 4, characterized in that: The clamping member (205) includes a movable plate (205a), and a mounting groove (M) is provided in the clamping plate (105). The movable plate (205a) slides in the mounting groove (M), and a serration (205b) is fixed on the outside of the movable plate (205a).

6. The Kelvin test clip as described in claim 5, characterized in that: The clamping member (205) also includes a second limiting block (205c) fixed at the opening of the mounting groove (M).

7. The Kelvin test clip as described in claim 5 or 6, characterized in that: The clamping member (205) also includes a second spring (205d) fixed inside the movable plate (205a), with its other end in contact with the inner wall of the mounting groove (M).

8. The Kelvin test clip as described in claim 7, characterized in that: The second blocking member (206) includes a connecting plate (206a) fixed to the end of the movable plate (205a). The clamping plate (105) has a central hole (H1) and side holes (H2) communicating with it on both sides. A first piston (206b) slides in the central hole (H1) and is fixed to the end of the connecting plate (206a). A second piston (206c) slides in the side holes (H2). A connecting rod (206d) is fixed to one side of the second piston (206c).

9. The Kelvin test clip as described in claim 8, characterized in that: The second blocking member (206) also includes a magnet (206e) fixed to the end of the connecting rod (206d).

10. The Kelvin test clip as described in claim 9, characterized in that: The adjusting plate (202) has a scale on one side, and the end of the fastening bolt (201) is fixed with a handle (207).

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