A high-temperature and high-current resistant probe

Abstract

This invention provides a high-temperature and low-temperature resistant high-current probe, belonging to the field of probe technology. The high-temperature and low-temperature resistant high-current probe includes a needle body, comprising a first probe head, a sleeve, and a plunger. The first probe head is located at the top of the sleeve and connected to it. The plunger is located at the bottom of the sleeve. A first spring is installed inside the sleeve. One end of the sleeve has a constriction opening. One end of the first spring is connected to the plunger, causing the plunger to tend to extend out of the constriction opening of the sleeve. A second probe head is located at the end of the plunger furthest from the first spring. The surfaces of the first and second probe heads are sequentially electroplated with nickel, gold, and PD alloy from the inside out, and finally coated with an AuCo coating. This invention possesses excellent temperature resistance and high current carrying capacity, while also balancing conductivity stability and service life.

Description

Technical Field

[0001] This invention belongs to the field of probe technology, specifically a high-temperature and high-current resistant probe. Background Technology

[0002] Probes are contact media for electrical testing and are high-precision electronic hardware components. Existing probe structures generally include a needle tube, plunger, and spring. The probe tips are typically made of ordinary PD alloy, which has limited surface hardness and wear resistance. Meanwhile, existing springs are made of common brass, phosphor bronze, and tungsten-rhenium alloys. While these materials offer good conductivity, their conductivity can decrease in extremely low and high temperature environments, specifically -55°C and 200°C, respectively, leading to unstable conduction and affecting the probe's stable operation. Summary of the Invention

[0003] The purpose of this utility model is to address the aforementioned problems in existing technologies and propose a solution. A high-temperature and high-current resistant probe has the advantages of excellent temperature resistance, high current carrying capacity, and balanced conduction stability and service life.

[0004] The purpose of this utility model can be achieved through the following technical solution: a high and low temperature resistant high current probe, including a needle body, the needle body including a first probe head, a sleeve and a plunger, the first probe head is located at the top of the sleeve and connected to the sleeve, the plunger is located at the bottom of the sleeve, a first spring is installed inside the sleeve, one end of the sleeve is provided with a constriction opening, one end of the first spring is connected to the plunger, and the plunger has a tendency to pass through the constriction opening of the sleeve; The plunger has a second probe head at the end furthest from the first spring; The surfaces of the first probe head and the second probe head are electroplated with nickel, gold, and PD alloy from the inside out, and finally coated with AuCo coating.

[0005] Preferably, the cylindrical body is also provided with a number of through holes around it.

[0006] Preferably, the first probe head, the first spring, and the second probe head are all located on the same axis.

[0007] Preferably, the first spring is made of NAS604 material to improve its resistance to high and low temperatures.

[0008] Preferably, the needle body has a single-action structure to simplify the conduction path.

[0009] Compared with the prior art, the advantages of this utility model are: by electroplating nickel, gold, and PD alloy sequentially from the inside out on the surfaces of the first probe head and the second probe head, and finally superimposing an AuCo coating, the surface hardness and wear resistance are further improved. At the same time, the first spring is made of NAS604 material, which has excellent high and low temperature resistance and can work stably in a temperature range of -55 degrees Celsius to 200 degrees Celsius. It has excellent high and low temperature resistance, and can also have excellent temperature resistance and high current carrying capacity, while taking into account surface hardness and wear resistance, thus improving conductivity stability and probe life. Attached Figure Description

[0010] Figure 1 This is a side view of the present invention.

[0011] Figure 2 This is a front view of the present invention.

[0012] Figure 3 This is a front sectional view of the present invention.

[0013] In the figure, 2 is the first probe head; 3 is the sleeve; 31 is the first spring; 32 is the constriction opening; 33 is the through hole; 4 is the plunger; and 5 is the second probe head. Detailed Implementation

[0014] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0015] like Figures 1 to 3 As shown, a high-temperature and high-current resistant probe includes a needle body, which includes a first probe head 2, a sleeve 3, and a plunger 4. The first probe head 2 is located at the top of the sleeve 3 and connected to the sleeve 3. The plunger 4 is located at the bottom of the sleeve 3. A first spring 31 is installed inside the sleeve 3. One end of the sleeve 3 is provided with a constriction opening 32. One end of the first spring 31 is connected to the plunger 4, and the plunger 4 tends to extend out of the sleeve 3 through the constriction opening 32. The plunger 4 has a second probe head 5 at the end away from the first spring 31; The surfaces of the first probe head 2 and the second probe head 5 are electroplated with nickel, gold, and PD alloy from the inside out, and finally coated with AuCo coating.

[0016] The needle body has a single-action structure, which simplifies the conduction path.

[0017] Using the above structure, a composite electroplating process is performed on the surfaces of the first probe head 2 and the second probe head 5: first nickel plating, then gold plating, then PD plating, and finally AuCo coating. Compared with the existing technology that only uses PD alloy to increase strength, this method is beneficial to further improve the surface hardness and wear resistance.

[0018] The first probe head 2 and the second probe head 5 adopt a Kelvin structure design, which helps to improve measurement accuracy and stability. By adopting a single-action structure design, the conduction path is simplified and the overall conduction efficiency is improved.

[0019] Specifically, such as Figures 1 to 3 As shown, the cylinder body is also provided with several through holes 33.

[0020] The above structure, with the through hole 33, helps to achieve a certain heat dissipation effect.

[0021] like Figures 1 to 3 As shown, the first probe head 2, the first spring 31, and the second probe head 5 are all located on the same axis.

[0022] like Figures 1 to 3 As shown, the first spring 31 is made of NAS604 material to improve its high and low temperature resistance. NAS604 material possesses excellent high and low temperature resistance, allowing it to operate stably within a temperature range of -55 degrees Celsius to 200 degrees Celsius. It exhibits excellent high and low temperature resistance, high current carrying capacity, and also considers surface hardness and wear resistance, thus improving conductivity stability and probe lifespan.

[0023] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0024] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Meanwhile, the word "and / or" throughout the text means including three solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0025] All of the above components are general standard parts or components known to those skilled in the art. Their structure and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0026] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A high-low temperature resistant, high-current probe, comprising a needle body, characterized in that, The needle body includes a first probe head (2), a sleeve (3) and a plunger (4). The first probe head (2) is located at the top of the sleeve (3) and connected to the sleeve (3). The plunger (4) is located at the bottom of the sleeve (3). A first spring (31) is installed inside the sleeve (3). One end of the sleeve (3) is provided with a constriction opening (32). One end of the first spring (31) is connected to the plunger (4), and the plunger (4) tends to pass through the constriction opening (32) of the sleeve (3). The plunger (4) has a second probe head (5) at the end away from the first spring (31); The surfaces of the first probe head (2) and the second probe head (5) are electroplated with nickel, gold, and PD alloy from the inside out, and finally coated with AuCo coating.

2. The high-temperature and high-current resistant probe according to claim 1, characterized in that, The sleeve (3) is also provided with several through holes (33) around its perimeter.

3. The high-temperature and high-current resistant probe according to claim 1, characterized in that, The first probe head (2), the first spring (31), and the second probe head (5) are all located on the same axis.

4. The high-temperature and high-current resistant probe according to claim 1, characterized in that, The first spring (31) is made of NAS604 material to improve its resistance to high and low temperatures.

5. A high-temperature and high-current resistant probe according to claim 1, characterized in that, The needle body has a single-action structure, which simplifies the conduction path.

Images