A resistance test probe

Abstract

This utility model relates to the field of resistance testing technology and discloses a resistance testing probe, including a probe body, a probe tip, and a rotating cylinder slidably sleeved on the outer end of the probe body. A chuck is fixedly connected to the upper end of the outer wall of the probe tip, a support ring is fixedly connected to the upper end of the probe body, and a limiting ring is fixedly connected to the upper end of the outer wall of the rotating cylinder. The bottom ring of the support ring is rotatably connected to a rotating ring with a T-shaped cross-section. A spring is fixedly connected between the rotating ring and the limiting ring. A limiting block is fixedly connected to the upper end of the inner wall of the rotating cylinder. A limiting groove with a Z-shaped cross-section is formed on the outer wall of the probe. Several slots are formed on the outer wall of the chuck. An embedded protrusion is formed at the bottom end of the inner wall of the rotating cylinder. An annular groove is formed on the inner wall of the rotating cylinder near the upper end of the embedded protrusion. This utility model significantly improves the stability of the connection between the probe tip and the probe body by cooperating with the Z-shaped limiting groove and the limiting block, combined with the double limiting of the embedded protrusion and the slot, thus preventing loosening during testing.

Description

Technical Field

[0001] This utility model relates to the field of resistance testing technology, specifically a resistance testing probe. Background Technology

[0002] A resistance test probe is a probe tool used to measure the resistance of electronic components, circuit nodes, or conductors. It is usually made of conductive metal (such as copper or alloys), with a pointed or flat head and a tail that can be connected to equipment such as a multimeter or resistance tester.

[0003] Currently, the tip and body of resistance testing probes mostly rely on a single thread or snap-fit ​​for fixation, resulting in insufficient connection stability. During testing, they are prone to loosening due to vibration, affecting measurement accuracy. Therefore, we propose a resistance testing probe. Utility Model Content

[0004] The purpose of this invention is to provide a resistance testing probe to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a resistance testing probe, comprising a probe body, a probe tip, and a rotating cylinder slidably sleeved on the outer end of the probe body, wherein a chuck is fixedly connected to the upper end of the outer wall of the probe tip;

[0006] A support ring is fixedly connected to the upper end of the needle body wall, and a limit ring is fixedly connected to the upper end of the outer wall of the rotating cylinder. The bottom ring of the support ring is embedded in a rotating ring with a T-shaped cross section. A spring is fixedly connected between the rotating ring and the limit ring. A limit block is fixedly connected to the upper end of the inner wall of the rotating cylinder. A limit groove with a Z-shaped cross section is opened on the outer wall of the needle body. A number of slots are opened on the outer wall of the chuck. An embedded protrusion is opened at the bottom end of the inner wall of the rotating cylinder. An annular groove is located on the inner wall of the rotating cylinder near the upper end of the embedded protrusion.

[0007] Preferably, the surface of the rotating drum is provided with annular grooves.

[0008] Preferably, the limiting slide groove has two openings at its two ends, one facing upwards and the other downwards, and the diameter of the limiting slide groove matches the diameter of the limiting block.

[0009] Preferably, the diameter of the slot matches the diameter of the embedded protrusion.

[0010] Preferably, the diameter of the annular groove matches the diameter of the chuck.

[0011] Compared with the prior art, the beneficial effects of this utility model are: by cooperating with the Z-shaped limiting slide groove and the limiting block, combined with the double limiting of the embedded protrusion and the slot, the stability of the connection between the needle and the needle body is greatly improved, avoiding loosening during testing. When not in use, there is no need to disassemble the needle. The needle is wrapped by the upper sleeve of the rotating cylinder, and the spring storage achieves protection, reducing the risk of loss and wear. It is also easy to operate. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0014] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0015] Figure 4 This is a cross-sectional view of the rotating drum and chuck of this utility model.

[0016] In the diagram: 1. Needle body; 101. Limiting groove; 102. Slot; 11. Support ring; 12. Needle head; 13. Chuck; 2. Rotary cylinder; 201. Ring groove; 202. Embedded protrusion; 20. Limiting block; 21. Limiting ring; 22. Spring; 23. Rotary ring. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-4 The present invention provides the following technical solution:

[0019] Example 1: A resistance test probe includes a probe body 1, a probe tip 12, and a rotating cylinder 2 that is slidably sleeved on the outer end of the probe body 1. A chuck 13 is fixedly connected to the upper end of the outer wall of the probe tip 12, and annular grooves are formed on the surface of the rotating cylinder 2.

[0020] When using, hold the needle body 1 and align the needle tip 12 with the bottom of the needle body 1. The initial docking is completed through the adapter structure of the chuck 13 and the needle body 1. The chuck 13 of the needle tip 12 is locked and fixed at the bottom of the needle body 1, and resistance testing can be performed. When replacing, rotate the needle tip 12 in the opposite direction to remove the old needle tip 12. Repeat the locking operation after replacement.

[0021] Example 2: The technical solution of this example, which differs from that of Example 1, includes: a support ring 11 fixedly connected to the upper end of the needle wall of the needle body 1; a limit ring 21 fixedly connected to the upper end of the outer wall of the rotating cylinder 2; a rotating ring 23 with a T-shaped cross-section embedded in the bottom ring of the support ring 11; a spring 22 fixedly connected between the rotating ring 23 and the limit ring 21; a limit block 20 fixedly connected to the upper end of the inner wall of the rotating cylinder 2; and a limit groove 1 with a Z-shaped cross-section opened on the outer wall of the needle body 1. 01. The outer wall of the chuck 13 is provided with several slots 102. The bottom of the inner wall of the rotating cylinder 2 is provided with embedded protrusions 202. The inner wall of the rotating cylinder 2 is near the upper end of the embedded protrusions 202. The two ends of the limiting slide groove 101 are respectively provided with two openings, one upward and one downward. The diameter of the limiting slide groove 101 matches the diameter of the limiting block 20. The diameter of the slots 102 matches the diameter of the embedded protrusions 202. The diameter of the annular groove 201 matches the diameter of the chuck 13.

[0022] When using the needle 12, align its chuck 13 with the annular groove 201 inside the rotating cylinder 2 and insert it. Rotate the rotating cylinder 2 so that the limiting block 20 slides along the Z-shaped limiting slide groove 101 to the lower end of the locking slot and locks. At this time, the embedded protrusion 202 on the inner wall of the rotating cylinder 2 will be inserted into the slot 102 of the chuck 13. The double limiting will form a stable fixation for the chuck 13, ensuring that the needle 12 is tightly connected to the needle body 1 and ensuring the stability during testing.

[0023] When not in use or requiring temporary storage, there is no need to remove the needle 12 and place it aside. Simply pull the rotating cylinder 2 upwards, causing the limiting block 20 to slide along the Z-shaped limiting groove 101 to the other end. At this time, the limiting block 20 will engage with the upper latch, and the spring 22 will stretch and store force. Under the action of the spring 22, the rotating cylinder 2 will completely enclose and wrap the entire needle 12, providing temporary protection for the needle 12 and preventing accidental damage from bumps. When using it again, reverse the operation to return the limiting block 20 to the lower latch, and the needle 12 will be unlocked and put into working condition. The operation is flexible and the storage is convenient.

[0024] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A resistance test probe, comprising a probe body (1), a probe tip (12) and a rotating cylinder (2) slidably sleeved on the outer end of the probe body (1), wherein a chuck (13) is fixedly connected to the upper end of the outer wall of the probe tip (12). Its features are: The needle body (1) has a support ring (11) fixedly connected to the upper end of the needle wall. The upper end of the outer wall of the rotating cylinder (2) has a limit ring (21) fixedly connected. The bottom ring of the support ring (11) is embedded with a rotating ring (23) with a T-shaped cross section. A spring (22) is fixedly connected between the rotating ring (23) and the limit ring (21). The upper end of the inner wall of the rotating cylinder (2) is fixedly connected with a limit block (20). The outer wall of the needle body (1) is provided with a limit groove (101) with a Z-shaped cross section. The outer wall of the chuck (13) is provided with several slots (102). The bottom end of the inner wall of the rotating cylinder (2) is provided with an embedded protrusion (202). The inner wall of the rotating cylinder (2) has an annular groove (201) near the upper end of the embedded protrusion (202).

2. The resistance testing probe according to claim 1, characterized in that: The surface of the rotating drum (2) is provided with annular grooves.

3. A resistance testing probe according to claim 1, characterized in that: The limiting slide (101) has two openings at its two ends, one facing upwards and the other downwards, and the diameter of the limiting slide (101) matches the diameter of the limiting block (20).

4. A resistance testing probe according to claim 1, characterized in that: The diameter of the slot (102) matches the diameter of the embedded protrusion (202).

5. A resistance testing probe according to claim 1, characterized in that: The diameter of the annular groove (201) matches the diameter of the chuck (13).

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