Low-current test probe

Abstract

The utility model belongs to the technical field of test probes, and particularly discloses a low-current test probe, which comprises a shell, a mounting column is arranged in the shell, a connecting plate is fixedly connected to the bottom of the mounting column, and a replacement assembly is arranged at the bottom of the connecting plate. The replacing assembly comprises a needle head, a plurality of clamping blocks are fixedly connected to the top of the needle head, a clamping groove is formed in a connecting plate, a fixing ring is arranged on the outer side of the needle head and located at the joint of the connecting plate and the needle head, two fixing pieces are arranged on the inner side of the fixing ring, and the opposite ends of the two fixing pieces are fixedly connected with a fixing rod; the multiple clamping blocks are clamped with the clamping grooves, the two fixing rods are both in threaded connection with the fixing ring, the bottom of the mounting column is fixedly connected with a sampling needle, through arrangement of the replacement assembly, a needle head can be conveniently replaced, the replacement operation of the needle head is convenient, and the test continuity and efficiency are prevented from being affected; meanwhile, as only the needle needs to be replaced, and the mounting column does not need to be replaced, the cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of test probes, and more specifically, to a low current test probe. Background Art

[0002] The test probe is a high-end precision connection device, which is widely used in testing PCB circuit boards and FPC. It is mainly used as a precision probe for connection. It has been widely used in technical fields such as mobile phones, automobiles, medical treatment, and aerospace. When in use, the test probe is installed on the test fixture, one end of the test probe is connected to the output end, and the other end of the test probe is connected to the component being tested before testing can be performed.

[0003] The split probe with publication number CN213304421U has an outer side wall of the connecting sleeve that protrudes outwardly from the axial limit protrusion located above the upper external cylinder cover. The axial limit protrusion is blocked by the lower external cylinder body after the lower external cylinder body and the upper external cylinder cover axially slide a preset distance in the direction close to the collar, effectively preventing the lower external cylinder body from sliding downward due to transition, causing the upper external cylinder cover and the lower external cylinder body to separate from each other, thereby causing the split probe of the utility model and the external mounting bracket to loosen from each other, thereby affecting the reliability of the operation of the outer probe and the inner probe.

[0004] However, the head of the external probe of the patent is often pressed and contacted with the corresponding electrode of the lithium battery during the testing of the lithium battery, so the position of the external probe that is easily damaged is the head of the external probe; when the head of the external probe is damaged, the entire external probe needs to be replaced, which increases the cost, and the overall replacement of the external probe may require downtime for maintenance, affecting the continuity and efficiency of the test or production process. Utility Model Content

[0005] In order to solve the above problems, the present application provides a low current test probe.

[0006] A low current test probe provided in this application adopts the following technical solution:

[0007] A small current test probe comprises a shell, a mounting column is arranged inside the shell, a connecting plate is fixedly connected to the bottom of the mounting column, and a replacement component is arranged at the bottom of the connecting plate;

[0008] The replacement component includes a needle, a plurality of blocks are fixedly connected to the top of the needle, a card slot is provided inside the connecting plate, a fixing ring is provided on the outside of the needle, the fixing ring is located at the connection between the connecting plate and the needle, two fixing plates are provided on the inside of the fixing ring, and the opposite ends of the two fixing plates are fixedly connected to the fixing rod.

[0009] Through the above technical solution, the replacement component makes the needle replacement operation convenient, avoiding affecting the test continuity and efficiency; at the same time, since only the needle needs to be replaced and the mounting column does not need to be replaced, the cost is reduced.

[0010] Furthermore, a plurality of clamping blocks are clamped with the clamping slots, and the two fixing rods are both threadedly connected with the fixing ring.

[0011] Through the above technical solution, the clamping block and the clamping slot are clamped together, so that the needle and the connecting plate can be initially positioned and fixed.

[0012] Furthermore, a sampling needle is fixedly connected to the bottom of the mounting column, and the mounting column passes through the connecting plate and extends to the interior of the needle.

[0013] Through the above technical solution, the sampling needle contacts the electrode of the battery, passes through the conductor through which the current flows and records the intensity of the current.

[0014] Furthermore, the bottom of the shell is fixedly connected with a base, the outer sleeve of the mounting column is provided with a spring, the top of the mounting column is fixedly connected with a fixing plate, and both ends of the spring are fixedly connected with the connecting plate and the fixing plate respectively.

[0015] Through the above technical solution, the sampling needle contacts the electrode, and the spring applies force to the needle head, so that the needle head of the sampling needle contacts the electrode of the battery well.

[0016] Furthermore, a threaded rod is fixedly connected to the top of the fixing plate, and a bolt is threadedly connected to the outer wall of the threaded rod.

[0017] In summary, the present application includes at least one of the following beneficial technical effects:

[0018] The utility model can conveniently replace the needle through the arrangement of the replacement component. Specifically, when it is damaged, the fixing rod is twisted to separate the fixing piece, the connecting plate and the needle. At this time, the needle is pulled out to realize disassembly. During installation, the clamping block on the needle is first inserted into the clamping groove of the connecting plate to realize preliminary positioning. Then, the fixing ring is placed between the connecting plate and the needle. The fixing rod is rotated to make the fixing piece abut against the connecting plate and the needle to realize fixation, so that the replacement operation of the needle is convenient and avoids affecting the continuity and efficiency of the test. At the same time, since only the needle needs to be replaced and the installation column does not need to be replaced, the cost is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the connection structure between the mounting column and the spring of the utility model;

[0021] Figure 3This is a schematic diagram of the connection structure between the sampling needle and the fixing plate of the utility model;

[0022] Figure 4 It is a schematic diagram of the connection structure between the mounting seat and the needle of the utility model.

[0023] Explanation of the accompanying drawings: 1. Shell; 2. Base; 3. Mounting column; 4. Spring; 5. Threaded rod; 6. Bolt; 7. Needle; 8. Connecting plate; 9. Fixing ring; 10. Fixing rod; 11. Fixing plate; 12. Block; 13. Sampling needle; 14. Fixing plate. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0025] Reference Figure 1-Figure 4 A low current test probe comprises a housing 1, a mounting post 3 is arranged inside the housing 1, a connecting plate 8 is fixedly connected to the bottom of the mounting post 3, and a replacement assembly is arranged at the bottom of the connecting plate 8;

[0026] The replacement component includes a needle 7, a plurality of blocks 12 are fixedly connected to the top of the needle 7, a card slot is provided inside the connecting plate 8, a fixing ring 9 is provided on the outside of the needle 7, the fixing ring 9 is located at the connection between the connecting plate 8 and the needle 7, two fixing plates 11 are provided on the inner side of the fixing ring 9, and the opposite ends of the two fixing plates 11 are fixedly connected to the fixing rod 10.

[0027] By setting the replacement component, the needle 7 can be easily replaced. Specifically, when it is damaged, the fixing rod 10 is twisted to separate the fixing plate 11, the connecting plate 8 and the needle 7. At this time, the needle 7 is pulled out to achieve disassembly. During installation, the block 12 on the needle 7 is first inserted into the slot of the connecting plate 8 to achieve preliminary positioning. Then the fixing ring 9 is placed between the connecting plate 8 and the needle 7. The fixing rod 10 is rotated to make the fixing plate 11 abut against the connecting plate 8 and the needle 7 to achieve fixation, so that the replacement operation of the needle 7 is convenient to avoid affecting the test continuity and efficiency. At the same time, since only the needle 7 needs to be replaced, the mounting column 3 does not need to be replaced, thereby reducing the cost.

[0028] Reference Figure 1-Figure 4 , multiple card blocks 12 are snapped into the card slots, two fixing rods 10 are threadedly connected to the fixing ring 9, and a sampling needle 13 is fixedly connected to the bottom of the mounting column 3, and the mounting column 3 passes through the connecting plate 8 and extends to the inside of the needle 7.

[0029] When the needle 7 is damaged and needs to be replaced, the card block 12 is first inserted into the card slot to achieve positioning. The sampling needle 13 is built into the mounting column 3 and insulated from the mounting column 3, so that the sampling needle 13 and the mounting column 3 are not electrically connected to each other, reducing the risk of short circuit, ensuring that the current flows along the expected path, and avoiding abnormal situations.

[0030] Reference Figure 1-Figure 2 The bottom of the shell 1 is fixedly connected to the base 2, the outer sleeve of the mounting column 3 is provided with a spring 4, the top of the mounting column 3 is fixedly connected to the fixing plate 14, the two ends of the spring 4 are respectively fixedly connected to the connecting plate 8 and the fixing plate 14, the top of the fixing plate 14 is fixedly connected to the threaded rod 5, and the outer wall of the threaded rod 5 is threadedly connected to the bolt 6.

[0031] The sampling needle 13 contacts the electrode, and the spring 4 applies a force to the needle head 7, so that the needle head 7 of the sampling needle 13 contacts well with the electrode of the battery.

[0032] Working principle: The sampling needle 13 and the end of the needle 7 contact the battery, and the sampling needle 13 detects the current and voltage of the battery. The needle 7 is often pressed against the corresponding electrode of the lithium battery during the long-term testing of the lithium battery, which will be damaged. When damaged, twist the fixing rod 10 to separate the fixing plate 11, the connecting plate 8 and the needle 7. At this time, pull out the needle 7 to achieve disassembly. When installing, first insert the block 12 on the needle 7 into the slot of the connecting plate 8 to achieve preliminary positioning, and then place the fixing ring 9 between the connecting plate 8 and the needle 7, and rotate the fixing rod 10 to make the fixing plate 11 abut against the connecting plate 8 and the needle 7 to achieve fixation.

[0033] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A low current test probe, characterized in that: include: A housing (1), wherein a mounting column (3) is provided inside the housing (1), a connecting plate (8) is fixedly connected to the bottom of the mounting column (3), and a replacement component is provided at the bottom of the connecting plate (8); A replacement assembly comprises a needle (7), the top of the needle (7) being fixedly connected to a plurality of clamping blocks (12), a clamping groove being provided inside the connecting plate (8), a fixing ring (9) being provided on the outside of the needle (7), the fixing ring (9) being located at the connection between the connecting plate (8) and the needle (7), two fixing plates (11) being provided on the inside of the fixing ring (9), and opposite ends of the two fixing plates (11) being fixedly connected to a fixing rod (10).

2. A low current test probe according to claim 1, characterized in that: The plurality of clamping blocks (12) are clamped with the clamping slots, and the two fixing rods (10) are both threadedly connected with the fixing ring (9).

3. A low current test probe according to claim 1, characterized in that: A sampling needle (13) is fixedly connected to the bottom of the mounting column (3), and the mounting column (3) penetrates the connecting plate (8) and extends to the interior of the needle head (7).

4. A low current test probe according to claim 1, characterized in that: The bottom of the shell (1) is fixedly connected to a base (2), the outside of the mounting column (3) is sleeved with a spring (4), the top of the mounting column (3) is fixedly connected to a fixing plate (14), and the two ends of the spring (4) are respectively fixedly connected to the connecting plate (8) and the fixing plate (14).

5. A low current test probe according to claim 4, characterized in that: A threaded rod (5) is fixedly connected to the top of the fixing plate (14), and a bolt (6) is threadedly connected to the outer wall of the threaded rod (5).

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