Test probe capable of allowing large current to pass through

Abstract

The utility model relates to the field of test probes, in particular to a test probe capable of passing heavy current, which comprises a probe shaft and a contact head, the contact head is arranged at one end of the probe shaft, the contact head is wound into a sphere by a copper wire, a small part of the contact head is embedded in the probe shaft, and the other part of the contact head is arranged outside the probe shaft. According to the utility model, components such as the probe shaft and the contact head are arranged, the probe shaft component and the contact head component are matched with each other in the working process, and the contact head is formed by winding a copper wire into a sphere, so that the probe contact head has plasticity and is plasticized according to the surface of a measured object, and the probe shaft component is driven to move; the probe shaft component drives the contact head component to contact an object to be measured, and the shape of the contact head changes along with the contact surface of the object to be measured after the contact head is pressed, so that the contact surface of the probe is enlarged, namely, the contact area of the contact head of the probe is enlarged, and the overcurrent of the probe is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of test probes, in particular to a test probe capable of passing a large current. Background Art

[0002] Probes are commonly used in industrial control electronic products and automatic test equipment for power electronic products. Probes are mainly used to test frequency converters, servo drives, photovoltaic energy storage inverters, electric vehicle controllers, UPS power supplies, etc. They mainly test the high-voltage input and output of products with currents within 200A.

[0003] After searching, the test probe disclosed in the Chinese patent with the announcement number CN216816757U has the following technical points: the material of the test needle is palladium alloy. The test probe of the utility model can effectively reduce the manufacturing cost of the test probe, and is conducive to maintaining the contact stability between the test needle and the workpiece to be tested. During the processing, the contact area of ​​the probe is increased to prevent arc burning of the product terminal under high current conditions. However, the traditional probe contact heads are all fixed in shape, usually cylindrical, plum blossom, and pointed needle. These shapes are fixed, so that the size of the contact surface with the object to be tested is fixed and the size of the contact surface cannot be changed.

[0004] Therefore, a new solution needs to be proposed to solve this problem. Utility Model Content

[0005] In view of the above background technology, the conventional probe contact heads in the prior art are all of fixed shape, so that the size of the contact surface with the object to be measured is fixed and the size of the contact surface cannot be changed.

[0006] The utility model discloses a test probe capable of passing a large current, comprising a probe shaft and a contact head. The contact head is installed at one end of the probe shaft and is wound into a sphere using copper wire. A small part of the contact head is embedded in the probe shaft, and the other part is outside the probe shaft.

[0007] By adopting the above scheme, since the contact head is made of copper wire wound into a spherical shape, the probe contact head has plasticity and is plasticized according to the surface of the object to be measured. When the contact head of the probe contacts the object to be measured, the shape of the contact head changes with the contact surface of the object to be measured, thereby increasing the contact surface of the probe, which is equivalent to increasing the contact area of ​​the probe contact head, thereby increasing the increase in the current that the probe can pass.

[0008] Optionally, a needle sleeve is provided at one end of the probe shaft, and the needle sleeve is sleeved on the probe shaft.

[0009] By adopting the above solution, the needle sleeve is used to install the probe component.

[0010] Optionally, the needle sleeve is configured to be in a "T" shape, and the large end of the needle sleeve is configured at an end close to the contact head.

[0011] By adopting the above solution, the needle sleeve can be conveniently fixed on the designated component through the protruding portion of the needle sleeve.

[0012] Optionally, a spring is provided at one end of the needle sleeve close to the contact head, and the spring is sleeved on the probe shaft.

[0013] By adopting the above solution, a resistance is formed by the spring when the probe shaft is contracted.

[0014] Optionally, a nut is provided on the probe shaft, and the nut is provided at an end away from the contact head.

[0015] By adopting the above solution, the nut fixes the probe shaft to prevent the probe from being separated from the needle sleeve.

[0016] Optionally, the probe shaft is arranged as a stepped shaft, one end of the spring contacts the needle sleeve, and the other end contacts the probe shaft.

[0017] By adopting the above configuration, the probe shaft is provided as a stepped shaft, so that one end of the spring can be brought into contact.

[0018] Optionally, the probe shaft is a solid structure, and a gold-plated layer is provided on the surface of the probe shaft.

[0019] By adopting the above solution, the gold-plated layer on the surface of the probe shaft makes it more corrosion-resistant, which is beneficial to extending the service life of the probe shaft.

[0020] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0021] 1. The utility model is provided with a probe shaft, a contact head and other components. Since the contact head is made of copper wire wound into a spherical shape, the probe contact head has plasticity and is plasticized according to the surface of the object to be measured. During the working process, the probe shaft component and the contact head component cooperate with each other and drive the probe shaft component to move, so that the probe shaft component drives the contact head component to contact the object to be measured. After the contact head is compressed, its shape changes with the contact surface of the object to be measured, thereby increasing the contact surface of the probe, which is equivalent to increasing the contact area of ​​the probe contact head, thereby increasing the increase in the current that the probe can pass.

[0022] 2. The utility model is provided with a needle sleeve, a nut, a spring and other components. During operation, the probe shaft is installed at a specified position through the needle sleeve component, and the movement of the needle sleeve component is controlled to drive the probe shaft component to follow the movement. Through the mutual cooperation between the spring component and the needle sleeve, after the contact head component contacts the object to be measured, the spring forms resistance when the probe shaft contracts, thereby achieving an extrusion effect on the contact head. The probe shaft is fixed by the nut to prevent the probe from detaching from the needle sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 This is a schematic diagram of the overall structure of one side of the utility model;

[0025] Figure 2 This is a schematic diagram of the other side structure of the utility model as a whole;

[0026] Figure 3 It is the front view of the utility model;

[0027] Figure 4 It is a partial cross-sectional view of the utility model.

[0028] In the figure: 1. probe shaft; 2. contact head; 3. needle sleeve; 4. nut; 5. spring; 6. plate. DETAILED DESCRIPTION

[0029] The following will disclose multiple embodiments of the utility model with diagrams. For the purpose of clear description, many physical details will be described together in the following description. However, it should be understood that these physical details should not be used to limit the utility model. In other words, in some embodiments of the utility model, these physical details are not necessary. In addition, for the purpose of simplifying the diagram, some conventional structures and components will be depicted in a simple schematic manner in the diagram.

[0030] See also Figure 1 , Figure 2 The utility model can pass a large current test probe, including a probe shaft 1 and a contact head 2. The contact head 2 is installed at one end of the probe shaft 1. The probe shaft 1 is a stepped shaft. Specifically, the larger end of the probe shaft 1 is connected to the contact head 2. The contact head 2 is wound into a spherical shape with copper wire. Since the contact head 2 is wound into a spherical shape with copper wire, the contact head 2 has plasticity.

[0031] In this embodiment, a small part of the contact head 2 is embedded in the probe shaft 1, and the other part is outside the probe shaft 1. By controlling the probe shaft 1 to move toward the object to be detected, the probe shaft 1 drives the contact head 2 to follow the movement. When the contact head 2 at one end of the probe shaft 1 contacts the object to be detected, as the contact head 2 moves, the shape of the contact head 2 will change with the contact surface of the object to be detected, thereby increasing the contact surface of the probe, which is equivalent to increasing the contact area of ​​the probe contact head 2, thereby increasing the increase in the current that the probe can pass.

[0032] See also Figure 3 , Figure 4 A needle sleeve 3 is provided at one end of the probe shaft 1, and the needle sleeve 3 is sleeved on the probe shaft 1. The probe shaft 1 is installed on the plate 6 through the needle sleeve 3. When the needle sleeve 3 is fixed on the plate 6, the plate 6 will be pushed by a mechanism. When the plate 6 moves, the probe shaft 1 is driven to move through the needle sleeve 3.

[0033] See also Figure 1 , Figure 2 The needle sleeve 3 is arranged in a "T" shape, and the large end of the needle sleeve 3 is arranged at an end close to the contact head 2, so as to facilitate the fixed connection between the needle sleeve 3 and the plate 6.

[0034] See also Figure 3 , Figure 4 A spring 5 is provided at one end of the needle sleeve 3 close to the contact head 2. The spring 5 is sleeved on the probe shaft 1. One end of the spring 5 contacts the needle sleeve 3, and the other end contacts the probe shaft 1. When the contact head 2 contacts the object to be measured, as the needle sleeve 3 moves, the needle sleeve 3 squeezes the spring 5, and at the same time, the spring 5 forms resistance when the probe shaft 1 contracts.

[0035] See also Figure 1 A nut 4 is provided on the probe shaft 1. The nut 4 is provided at an end away from the contact head 2. The probe shaft 1 is fixed by the nut 4 to prevent the probe from being separated from the needle sleeve 3.

[0036] In this embodiment, the probe shaft 1 is a solid structure, and a gold-plated layer is provided on the surface of the probe shaft 1 . The gold-plated layer on the surface of the probe shaft 1 makes the probe shaft 1 more corrosion-resistant, which is beneficial to prolonging the service life of the probe shaft 1 .

[0037] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A test probe capable of passing a large current, comprising a probe shaft (1) and a contact head (2), characterized in that: The contact head (2) is mounted on one end of the probe shaft (1); the contact head (2) is formed into a spherical shape by winding a copper wire; a small part of the contact head (2) is embedded in the probe shaft (1) and the other part is outside the probe shaft (1).

2. A test probe capable of passing a large current according to claim 1, characterized in that: A needle sleeve (3) is arranged at one end of the probe shaft (1), and the needle sleeve (3) is sleeved on the probe shaft (1).

3. A test probe capable of passing a large current according to claim 2, characterized in that: The needle sleeve (3) is arranged in a "T" shape, and the large end of the needle sleeve (3) is arranged at an end close to the contact head (2).

4. The test probe capable of passing a large current according to claim 3, characterized in that: A spring (5) is provided at one end of the needle sleeve (3) close to the contact head (2), and the spring (5) is sleeved on the probe shaft (1).

5. The test probe capable of passing a large current according to claim 1, characterized in that: A nut (4) is provided on the probe shaft (1), and the nut (4) is arranged at an end away from the contact head (2).

6. The test probe capable of passing a large current according to claim 4, characterized in that: The probe shaft (1) is arranged as a stepped shaft, one end of the spring (5) contacts the needle sleeve (3), and the other end contacts the probe shaft (1).

7. The test probe capable of passing a large current according to claim 1, characterized in that: The probe shaft (1) is a solid structure, and a gold-plated layer is provided on the surface of the probe shaft (1).

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