A new terminal contact resistance detection clamp

Abstract

The application discloses a novel terminal contact resistance detection clamp and belongs to the terminal detection field. The novel terminal contact resistance detection clamp comprises a base, further comprises upper and lower positioning blocks fixedly arranged on the base, the bottom of the upper positioning block is slidably connected with a pressing block, a static sheet terminal is arranged between the pressing block and the lower positioning block, an upper supporting block is arranged at the bottom of the upper positioning block, a lower supporting block is slidably arranged on the lower positioning block, sliding blocks are slidably connected on the upper and lower supporting blocks, clamping assemblies are arranged on the sliding blocks, clamping inclined blocks are arranged on the two clamping assemblies, a dynamic sheet terminal is arranged between the two clamping inclined blocks and is clamped and fixed through the clamping assemblies, the dynamic sheet terminal is in contact with the static sheet terminal, the application can eliminate the pressure fluctuation and position deviation caused by manual clamping, can ensure that the detection result can truly reflect the inherent contact performance of the terminal, and is suitable for the terminal production quality inspection scenes of multiple varieties and small batches.

Description

Technical Field

[0001] This invention relates to the field of terminal testing technology, and in particular to a novel terminal contact resistance testing fixture. Background Technology

[0002] Contact resistance of electrical contact components such as terminals and connectors is a core performance indicator for measuring their conductivity reliability. Excessive contact resistance can cause abnormal heating and increased energy loss when energized, and may even lead to connection failure and equipment malfunction. Therefore, high-precision testing of contact resistance is required in the production inspection and quality control of terminals. In the existing technology, terminal contact resistance testing often uses simple manual clamping fixtures. The contact force during clamping depends entirely on the operator's manual force control, which cannot guarantee the consistency of testing conditions. This results in large dispersion of contact resistance measurement results, making it difficult to truly reflect the inherent contact performance of terminals. It is easy to misjudge qualified products and miss unqualified products, which cannot meet the standardized quality inspection requirements of mass production.

[0003] In addition, the positioning structure of existing testing fixtures is mostly a fixed and dedicated design. A single fixture can only be used for a single specification of terminal product. When testing different types of terminals, the entire fixture needs to be replaced, resulting in high replacement costs and poor versatility. At the same time, the contact points of the terminals lack a precise and repeatable positioning structure during clamping, and the contact position is prone to shift during each test, which further amplifies the measurement error. Moreover, the clamping operation steps are cumbersome, the single-sample test is time-consuming, and the overall testing efficiency is low, making it difficult to meet the rapid quality inspection needs of large-scale terminal production. Summary of the Invention

[0004] The purpose of this invention is to provide a novel terminal contact resistance testing fixture to address the problems existing in the prior art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A novel terminal contact resistance testing fixture includes a base and further includes: An upper positioning block and a lower positioning block are fixedly mounted on the base, and a pressure block is slidably connected to the bottom of the upper positioning block; The stationary terminal is located between the pressure block and the lower positioning block; The upper support block is located at the bottom of the upper positioning block; The lower support block is slidably mounted on the lower positioning block. Both the upper support block and the lower support block are slidably connected to sliders. Each slider is provided with a clamping component, and both clamping components are provided with clamping inclined blocks. The moving plate terminal is disposed between two clamping inclined blocks and is clamped and fixed by a clamping assembly. The moving plate terminal is in contact with the stationary plate terminal.

[0006] Preferably, the clamping assembly includes a first threaded rod and a circular block fixedly disposed on the outer wall of the first threaded rod. A support plate is fixedly connected to the circular block. The support plate is fixedly connected to the clamping inclined block. Each slider is provided with a first concave hole and a second concave hole. The first threaded rod is rotatably connected in the first concave hole.

[0007] Furthermore, the outer wall of the circular block is provided with an annular rack, and the inner wall of the first concave hole is rotatably connected to a second threaded rod, and the outer wall of the second threaded rod is provided with a gear that meshes with the annular rack.

[0008] Furthermore, a first knob and a second knob are respectively fixedly connected to the end of the first threaded rod and the second threaded rod outside the first concave hole, and a first locking nut and a second locking nut are respectively threaded onto the outer wall of the first threaded rod and the second threaded rod.

[0009] Furthermore, both the upper support block and the lower support block are provided with cavities, and a third threaded rod is rotatably connected in the cavity. The slider is slidably connected in the cavity, and a threaded seat is provided on the slider. The third threaded rod is threadedly connected to the threaded seat.

[0010] Furthermore, the third threaded rod is provided with a worm gear, a rotating rod is rotatably connected inside the cavity, a worm gear that meshes with the worm gear is provided on the outer wall of the rotating rod, and the bottom of the third threaded rod is placed in the second concave hole.

[0011] Preferably, the base has two first pins at its top, and the upper positioning block is fixedly connected to the base by the two first pins. The base has four second pins at its bottom, and the lower positioning block is fixedly connected to the base by the second pins.

[0012] Furthermore, the upper positioning block is provided with a third pin, the pressure block is slidably connected to the third pin, and a first spring is sleeved on the outer wall of the third pin. The first spring is disposed between the pressure block and the bottom outer wall of the upper positioning block.

[0013] Furthermore, the upper positioning block is provided with a threaded countersunk hole, and a threaded pin is threadedly connected to the threaded countersunk hole. The top of the threaded pin is provided with an internal hexagonal groove, and the bottom of the threaded pin is rotatably connected to the upper support block.

[0014] Preferably, the lower positioning block is further provided with three fourth pins, the lower support block is slidably connected to the fourth pins, and each of the three fourth pins is fitted with a second spring. The second spring is disposed between the top outer wall of the lower support block and the lower positioning block. The top of the fourth pin located in the middle passes through the lower support block and extends upward into the upper support block. The upper support block is slidably connected to the fourth pin.

[0015] Compared with the prior art, the present invention provides a novel terminal contact resistance testing fixture, which has the following beneficial effects: 1. This novel terminal contact resistance testing fixture, by moving the pressure block, can create a gap for the insertion of a stationary terminal. After inserting the stationary terminal, releasing the pressure block allows it to automatically reset and achieve a fixing effect. Secondly, by moving the lower support block, a gap can be created for the insertion of a moving terminal. After inserting the moving terminal, releasing the lower support block allows it to automatically reset and achieve positioning of the moving terminal. This allows for precise control of the contact force and contact point, completely eliminating pressure fluctuations and positional deviations caused by manual clamping, significantly reducing the dispersion of measurement data, ensuring that the test results can truly reflect the inherent contact performance of the terminal, and avoiding misjudgment of qualified products and missed detection of unqualified products.

[0016] 2. This new terminal contact resistance testing fixture can form a double lock after being adjusted to a preset state, effectively resisting environmental vibration and terminal elastic reaction force during the testing process, eliminating problems such as loose clamping position and attenuation of contact pressure, ensuring constant testing conditions throughout the entire testing cycle, avoiding test data drift, and improving the consistency of results for long-term testing and multiple batches of continuous testing.

[0017] 3. This new terminal contact resistance testing fixture can be adapted to different types of terminals by adjusting the tilt angle of the clamping blocks, without the need to replace the entire testing fixture, which greatly reduces the tooling investment cost for multiple product models; at the same time, the changeover operation is simple and does not require recalibration of the overall benchmark, effectively shortening the changeover and debugging time, and is suitable for quality inspection scenarios of multi-variety, small-batch terminal production. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a novel terminal contact resistance testing fixture proposed in this invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of a novel terminal contact resistance testing fixture proposed in this invention. Figure 2 ; Figure 3 This is a schematic diagram of the bottom structure of a novel terminal contact resistance detection fixture proposed in this invention; Figure 4 This is a front cross-sectional schematic diagram of a novel terminal contact resistance testing fixture proposed in this invention. Figure 5 This is a schematic diagram of the slider in a novel terminal contact resistance detection fixture proposed in this invention; Figure 6 This is a schematic diagram of the base structure in a novel terminal contact resistance testing fixture proposed in this invention; Figure 7This is a cross-sectional schematic diagram of a novel terminal contact resistance testing fixture proposed in this invention; Figure 8 This is a front cross-sectional schematic diagram of the upper support block in a novel terminal contact resistance testing fixture proposed in this invention. Figure 9 This invention proposes a novel terminal contact resistance testing fixture. Figure 5 An enlarged schematic diagram of part A in the middle.

[0019] In the diagram: 1. Base; 101. First pin; 102. Second pin; 2. Upper positioning block; 201. Third pin; 202. Threaded countersunk hole; 203. Threaded pin; 204. Socket hexagonal groove; 205. First spring; 206. Pressure block; 3. Lower positioning block; 301. Stationary plate terminal; 302. Fourth pin; 303. Second spring; 4. Upper support block; 401. Cavity; 402. Slider; 403. First recessed hole; 404. Second... 405. Concave hole; 406. Round block; 407. Support plate; 408. Clamping inclined block; 409. Threaded seat; 5. Lower support block; 501. Moving plate terminal; 6. First threaded rod; 601. Ring rack; 602. Second threaded rod; 603. Gear; 604. First locking nut; 605. Second locking nut; 606. First knob; 607. Second knob; 7. Third threaded rod; 701. Worm gear; 702. Rotating rod; 703. Worm. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0022] Example 1: Refer to Figures 1-9A novel terminal contact resistance testing fixture includes a base 1, and an upper positioning block 2 and a lower positioning block 3 fixedly mounted on the base 1. A pressure block 206 is slidably connected to the bottom of the upper positioning block 2. A stationary terminal 301 is disposed between the pressure block 206 and the lower positioning block 3. An upper support block 4 is disposed at the bottom of the upper positioning block 2. A lower support block 5 is slidably mounted on the lower positioning block 3. A slider 402 is slidably connected to both the upper support block 4 and the lower support block 5. A clamping assembly is provided on the slider 402. Each of the two clamping assemblies is provided with a clamping inclined block 407. A moving terminal 501 is disposed between the two clamping inclined blocks 407 and is clamped and fixed by the clamping assembly. The moving terminal 501 is in contact with the stationary terminal 301.

[0023] In this embodiment, during use, the pressure block 206 is first pushed upwards so that it no longer abuts against the lower positioning block 3, thus creating a gap between the pressure block 206 and the lower positioning block 3. Then, the stationary terminal 301 is placed between the pressure block 206 and the lower positioning block 3. After releasing the pressure block 206, it will automatically reset, thus cooperating with the lower positioning block 3 to achieve the clamping effect on the stationary terminal 301. The stationary terminal 301 remains fixed throughout the entire testing process. If different terminals need to be measured, only the corresponding pressure block 206 and lower positioning block 3 need to be replaced, making it convenient to use.

[0024] When installing the moving plate terminal 501, press down on the lower support block 5 to make it slide on the lower positioning block 3, thereby creating a certain gap between the two clamping inclined blocks 407 between the upper support block 4 and the lower support block 5. At this time, the moving plate terminal 501 can be directly placed into the gap. Release the lower support block 5, and the lower support block 5 can automatically reset, thereby clamping the moving plate terminal 501 between the two clamping inclined blocks 407. The ends of the two clamping inclined blocks 407 are inclined and cooperate with each other, which can achieve the inclined clamping of the moving plate terminal 501, so that it can better contact the stationary plate terminal 301 and complete the positioning and fixing effect. Specifically, in actual use...

[0025] The stationary terminal 301 is rigidly clamped and positioned by the pressure block 206 and the lower positioning block 3. After clamping, there is no displacement in any direction, ensuring that the contact points of the stationary end are completely coincident in each test. The moving terminal 501 is centered and fixed by the upper and lower symmetrical clamping components, which can accurately control the contact positive force at the preset value, completely solving the pain point of pressure varying from person to person and large fluctuations between batches when using traditional manual clamping.

[0026] Example 2: Refer to Figures 1-9A novel terminal contact resistance testing fixture includes a base 1, and an upper positioning block 2 and a lower positioning block 3 fixedly mounted on the base 1. A pressure block 206 is slidably connected to the bottom of the upper positioning block 2. A stationary terminal 301 is disposed between the pressure block 206 and the lower positioning block 3. An upper support block 4 is disposed at the bottom of the upper positioning block 2. A lower support block 5 is slidably mounted on the lower positioning block 3. A slider 402 is slidably connected to both the upper support block 4 and the lower support block 5. A clamping assembly is provided on the slider 402. Each of the two clamping assemblies is provided with a clamping inclined block 407. A moving terminal 501 is disposed between the two clamping inclined blocks 407 and is clamped and fixed by the clamping assembly. The moving terminal 501 is in contact with the stationary terminal 301.

[0027] Reference Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 8 and Figure 9 The clamping assembly includes a first threaded rod 6 and a circular block 405 fixedly disposed on the outer wall of the first threaded rod 6. A support plate 406 is fixedly connected to the circular block 405. The support plate 406 is fixedly connected to the clamping inclined block 407. The slider 402 is provided with a first concave hole 403 and a second concave hole 404. The first threaded rod 6 is rotatably connected in the first concave hole 403.

[0028] Reference Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 8 and Figure 9 The outer wall of the round block 405 is provided with an annular rack 601, and the inner wall of the first concave hole 403 is rotatably connected to a second threaded rod 602. The outer wall of the second threaded rod 602 is provided with a gear 603 that meshes with the annular rack 601.

[0029] Reference Figure 5 , Figure 8 and Figure 9 The first threaded rod 6 and the second threaded rod 602 are respectively fixedly connected to the first knob 606 and the second knob 607 at the ends of the first threaded rod 6 and the second threaded rod 602 outside the first concave hole 403. The first locking nut 604 and the second locking nut 605 are respectively threaded onto the outer walls of the first threaded rod 6 and the second threaded rod 602.

[0030] In this embodiment, the clamping angle can also be adjusted by the clamping assembly. Specifically, during use, rotating the first knob 606 controls the rotation of the first threaded rod 6, which drives the round block 405 to rotate. This, in turn, drives the clamping inclined block 407 to rotate via the support plate 406, allowing it to rotate to the required tilt angle. Using the same method, the two clamping inclined blocks 407 on the upper support block 4 and the lower support block 5 are rotated to a parallel state, thereby better achieving the clamping effect on the moving plate terminal 501. After the adjustment is completed, rotating the first locking nut 604 connected to the first threaded rod 6 moves it to abut against the outer wall of the upper support block 4 or the lower support block 5, thereby limiting the first threaded rod 6 so that it cannot rotate. This prevents the clamping inclined block 407 from rotating, improving the stability of use. Furthermore, multiple first locking nuts 604 are provided, allowing multiple first locking nuts 604 to abut tightly against each other, further improving the limiting effect on the first threaded rod 6.

[0031] Secondly, this application also includes a second threaded rod 602 and a gear 603 connected to the second threaded rod 602. The gear 603 is always engaged with the annular rack 601 on the round block 405. When the angle of the clamping inclined block 407 is fixed and limited by the first threaded rod 6, the second locking nut 605 on the second threaded rod 602 is tightened so that the second locking nut 605 abuts against the outer wall of the upper support block 4 or the lower support block 5, thereby forming a secondary fixation. There are also multiple second locking nuts 605. The multiple second locking nuts 605 abut tightly together, which can further improve the limiting effect. At this time, even if the first threaded rod 6 rotates, the gear 603 can form a limiting effect with the annular rack 601 while the gear 603 is fixed, thus improving the overall use effect.

[0032] When the angle needs to be adjusted, loosen the first locking nut 604 and the second locking nut 605 to make the adjustment. After the adjustment is completed, fix it again with the first locking nut 604 and the second locking nut 605.

[0033] Reference Figure 5 and Figure 8 Both the upper support block 4 and the lower support block 5 are provided with cavities 401. A third threaded rod 7 is rotatably connected in the cavity 401. A slider 402 is slidably connected in the cavity 401. A threaded seat 408 is provided on the slider 402. The third threaded rod 7 is threadedly connected to the threaded seat 408.

[0034] The third threaded rod 7 is provided with a worm gear 701, and a rotating rod 702 is rotatably connected in the cavity 401. The outer wall of the rotating rod 702 is provided with a worm 703 that meshes with the worm gear 701. The bottom of the third threaded rod 7 is placed in the second concave hole 404.

[0035] In this embodiment, controlling the rotation of the rotating rod 702 can drive the worm gear 703 connected to its outer wall to rotate, thereby causing the worm gear 703 to drive the meshing worm wheel 701 to rotate, which in turn causes the worm wheel 701 to drive the third threaded rod 7 to rotate. The third threaded rod 7 will be threadedly connected to the threaded seat 408, thereby causing the slider 402 to move up and down, thus adjusting the initial position of the slider 402 on the upper support block 4 or the lower support block 5. This ensures the clamping force and prevents the clamping from loosening. After adjustment, a double lock is formed, which can effectively resist environmental vibration and terminal elastic reaction force during the testing process, eliminate the phenomenon of threaded rod loosening and displacement, ensure constant contact positive force and no contact position shift throughout the entire testing cycle, avoid data drift, and improve the stability of results for long-term testing and multi-batch continuous testing.

[0036] Example 3: Refer to Figures 1-9 A novel terminal contact resistance testing fixture includes a base 1, and an upper positioning block 2 and a lower positioning block 3 fixedly mounted on the base 1. A pressure block 206 is slidably connected to the bottom of the upper positioning block 2. A stationary terminal 301 is disposed between the pressure block 206 and the lower positioning block 3. An upper support block 4 is disposed at the bottom of the upper positioning block 2. A lower support block 5 is slidably mounted on the lower positioning block 3. A slider 402 is slidably connected to both the upper support block 4 and the lower support block 5. A clamping assembly is provided on the slider 402. Each of the two clamping assemblies is provided with a clamping inclined block 407. A moving terminal 501 is disposed between the two clamping inclined blocks 407 and is clamped and fixed by the clamping assembly. The moving terminal 501 is in contact with the stationary terminal 301.

[0037] Reference Figures 1-4 and Figures 6-7 The base 1 has two first pins 101 on its top. The upper positioning block 2 is fixedly connected to the base 1 by the two first pins 101. The base 1 has four second pins 102 on its bottom. The lower positioning block 3 is fixedly connected to the base 1 by the second pins 102.

[0038] Reference Figures 1-4 and Figures 6-7 The upper positioning block 2 is provided with a third pin 201, and the pressure block 206 is slidably connected to the third pin 201. A first spring 205 is sleeved on the outer wall of the third pin 201, and the first spring 205 is disposed between the pressure block 206 and the bottom outer wall of the upper positioning block 2.

[0039] In this embodiment, the first pin 101 facilitates the installation and removal of the upper positioning block 2, and the second pin 102 facilitates the installation and removal of the lower positioning block 3. When the pressure block 206 is pushed upward, the pressure block 206 slides on the third pin 201 and compresses the first spring 205 simultaneously. When the stationary terminal 301 is placed in and the pressure block 206 is released, the first spring 205 automatically resets, thereby applying pressure to the pressure block 206 to limit the stationary terminal 301.

[0040] Reference Figures 1-4 and Figures 6-7 The upper positioning block 2 is provided with a threaded countersunk hole 202, and a threaded pin 203 is connected to the threaded countersunk hole 202. The top of the threaded pin 203 is provided with an internal hexagonal groove 204, and the bottom of the threaded pin 203 is rotatably connected to the upper support block 4.

[0041] In this embodiment, by rotating the threaded pin 203 to connect it to the upper positioning block 2, the upper support block 4 at its bottom can be moved downward, thereby adjusting the position of the upper support block 4. This facilitates the clamping of the moving plate terminal 501 by the two clamping inclined blocks 407 on the upper support block 4 and the lower support block 5. In actual use, a scale line can be set on the lower positioning block 3. By rotating the threaded pin 203, the positive force of the terminal contact can be adjusted. The magnitude of the positive force can be referenced to the corresponding scale on the positioning block for easy and intuitive observation.

[0042] Reference Figures 1-4 and Figures 6-7 The lower positioning block 3 is also provided with three fourth pins 302. The lower support block 5 is slidably connected to the fourth pins 302. Each of the three fourth pins 302 is fitted with a second spring 303. The second spring 303 is located between the lower support block 5 and the top outer wall of the lower positioning block 3. The top of the fourth pin 302 located in the middle passes through the lower support block 5 and extends upward into the upper support block 4. The upper support block 4 is slidably connected to the fourth pin 302.

[0043] In this invention, by pushing the lower support block 5 downward, it can slide along the fourth pin 302, while simultaneously compressing the second spring 303. Then, the moving plate terminal 501 is placed between the two clamping inclined blocks 407 and fixed under the elastic force of the second spring 303, thereby improving the fixing effect and ensuring that the contact point position between the stationary plate terminal 301 and the moving plate terminal 501 is consistent with the magnitude of the positive force during each measurement.

[0044] 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 equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A novel terminal contact resistance testing fixture, comprising a base (1), characterized in that, Also includes: An upper positioning block (2) and a lower positioning block (3) are fixedly installed on the base (1), and a pressure block (206) is slidably connected to the bottom of the upper positioning block (2). The stationary plate terminal (301) is disposed between the pressure block (206) and the lower positioning block (3); The upper support block (4) is located at the bottom of the upper positioning block (2); The lower support block (5) is slidably disposed on the lower positioning block (3). The upper support block (4) and the lower support block (5) are both slidably connected to sliders (402). The sliders (402) are provided with clamping components, and the two clamping components are provided with clamping inclined blocks (407). The moving plate terminal (501) is disposed between two clamping inclined blocks (407) and is clamped and fixed by the clamping assembly. The moving plate terminal (501) is in contact with the stationary plate terminal (301).

2. The novel terminal contact resistance testing fixture according to claim 1, characterized in that, The clamping assembly includes a first threaded rod (6) and a circular block (405) fixedly disposed on the outer wall of the first threaded rod (6). A support plate (406) is fixedly connected to the circular block (405). The support plate (406) is fixedly connected to the clamping inclined block (407). The slider (402) is provided with a first recess (403) and a second recess (404). The first threaded rod (6) is rotatably connected in the first recess (403).

3. A novel terminal contact resistance testing fixture according to claim 2, characterized in that, The outer wall of the circular block (405) is provided with an annular rack (601), and the inner wall of the first concave hole (403) is rotatably connected to a second threaded rod (602). The outer wall of the second threaded rod (602) is provided with a gear (603) that meshes with the annular rack (601).

4. A novel terminal contact resistance testing fixture according to claim 3, characterized in that, The first threaded rod (6) and the second threaded rod (602) are respectively fixedly connected to the first knob (606) and the second knob (607) at the end outside the first concave hole (403). The first locking nut (604) and the second locking nut (605) are respectively threaded onto the outer wall of the first threaded rod (6) and the second threaded rod (602).

5. A novel terminal contact resistance testing fixture according to claim 4, characterized in that, Both the upper support block (4) and the lower support block (5) are provided with cavities (401). A third threaded rod (7) is rotatably connected in the cavity (401). The slider (402) is slidably connected in the cavity (401). A threaded seat (408) is provided on the slider (402). The third threaded rod (7) is threadedly connected to the threaded seat (408).

6. A novel terminal contact resistance testing fixture according to claim 5, characterized in that, The third threaded rod (7) is provided with a worm gear (701), and a rotating rod (702) is rotatably connected in the cavity (401). The outer wall of the rotating rod (702) is provided with a worm (703) that meshes with the worm gear (701). The bottom of the third threaded rod (7) is placed in the second concave hole (404).

7. A novel terminal contact resistance testing fixture according to claim 1, characterized in that, The base (1) has two first pins (101) on its top. The upper positioning block (2) is fixedly connected to the base (1) by the two first pins (101). The base (1) has four second pins (102) on its bottom. The lower positioning block (3) is fixedly connected to the base (1) by the second pins (102).

8. A novel terminal contact resistance testing fixture according to claim 7, characterized in that, The upper positioning block (2) is provided with a third pin (201), and the pressure block (206) is slidably connected to the third pin (201). A first spring (205) is sleeved on the outer wall of the third pin (201), and the first spring (205) is disposed between the pressure block (206) and the bottom outer wall of the upper positioning block (2).

9. A novel terminal contact resistance testing fixture according to claim 7, characterized in that, The upper positioning block (2) is provided with a threaded countersunk hole (202), and a threaded pin (203) is threadedly connected in the threaded countersunk hole (202). The top of the threaded pin (203) is provided with an internal hexagonal groove (204), and the bottom of the threaded pin (203) is rotatably connected to the upper support block (4).

10. A novel terminal contact resistance testing fixture according to claim 1, characterized in that, The lower positioning block (3) is also provided with three fourth pins (302). The lower support block (5) is slidably connected to the fourth pins (302). Each of the three fourth pins (302) is fitted with a second spring (303). The second spring (303) is located between the lower support block (5) and the top outer wall of the lower positioning block (3). The top of the fourth pin (302) located in the middle passes through the lower support block (5) and extends upward into the upper support block (4). The upper support block (4) is slidably connected to the fourth pin (302).

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