Spring type contact probe

Abstract

The utility model relates to the technical field of contact probes, and discloses a spring type contact probe which comprises a needle cylinder, a rebound assembly is arranged in the needle cylinder, the rebound assembly comprises a needle shaft, an insulation sleeve and an insulation plate which are arranged in the needle cylinder, the insulation sleeve is arranged in the needle cylinder in a sliding mode, a sliding hole is formed in the top face of the insulation sleeve, and a spring is arranged in the sliding hole. And the insulating plate is fixed in the needle cylinder, and the insulating plate is sleeved with the interior of the sliding hole. According to the utility model, the insulating sleeve, the insulating plate and the tension spring are arranged, an elastic piece spring of a traditional spring type contact probe is replaced by the tension spring, then the insulating sleeve and the insulating plate are adopted to isolate the tension spring from the needle cylinder, so that no current passes through the tension spring, and the tension spring is more stable in the stretching and contracting state by utilizing the characteristic that the tension spring is higher in stability in the stretching and contracting state. Under the condition that no supporting mechanism is arranged, the situation that the tension spring is bent and makes contact with the inner wall of the needle cylinder in the using process, and consequently current passes through the tension spring is effectively avoided, and the reliability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of contact probes, in particular to a spring type contact probe. Background Art

[0002] Spring probes are mainly used to connect the metal contacts of electronic components or batteries. After being installed and connected to the main board, they are used for electronic products such as mobile phones and smart watches. Because of their stable performance during use, they are widely used in the fields of electronics, military, medical, aerospace, etc.

[0003] An existing spring probe (Publication No.: CN218997142U) has the following defects: the above device sets an insulating part inside the barrel to isolate the spring in the elastic part from the barrel, preventing the current from burning the spring through the spring. However, due to the poor stability of the spring during the compression process, without a support mechanism, the spring is prone to bend to one side during compression, resulting in one side of the spring touching the inner wall of the barrel, causing current to pass through the spring. Therefore, this utility model is proposed. Summary of the Utility Model

[0004] The purpose of this utility model is to solve the problems existing in the prior art, and a spring type contact probe is proposed.

[0005] In order to achieve the above purpose, this utility model adopts the following technical scheme:

[0006] A spring type contact probe includes a barrel. A return spring assembly is arranged inside the barrel. The return spring assembly includes a needle shaft, an insulating sleeve and an insulating plate arranged inside the barrel. The insulating sleeve is slidably arranged inside the barrel. A sliding hole is opened on the top surface of the insulating sleeve. The insulating plate is fixed inside the barrel and is also sleeved inside the sliding hole.

[0007] Preferably, a tension spring is fixed on one side of the insulating plate close to the rear end of the barrel. One end of the tension spring is fixed to one side of the sliding hole. A contact block is fixed at the front end of the sliding hole. The front end of the contact block abuts against the rear end of the needle shaft.

[0008] Preferably, the needle shaft includes a contact end at the front end and a clamping end at the rear end. The diameter of the clamping end is larger than that of the contact end. The clamping end is in clearance fit with the inside of the barrel.

[0009] Preferably, the rear side of the clamping end is of an inclined surface structure, and the contact block is of a solid semi-circular structure.

[0010] Preferably, the distance from the front side of the insulating sleeve to the front side inside the sliding hole is greater than the distance from the rear end of the insulating sleeve to the rear side inside the barrel.

[0011] Preferably, a threaded post is fixed at the rear end of the barrel.

[0012] The beneficial effects of the present utility model are as follows:

[0013] By providing an insulating sleeve, an insulating plate and a tension spring, the spring of the elastic member of the traditional spring-type contact probe is replaced with a tension spring, and then the insulating sleeve and the insulating plate are used to isolate the tension spring from the syringe barrel, so that no current will pass through the tension spring. By taking advantage of the characteristic that the tension spring has high stability in the stretching and contracting states, it is possible to effectively prevent the tension spring from bending and contacting the inner wall of the syringe barrel during use without setting any supporting mechanism, thereby preventing current from passing through the tension spring and increasing the reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a three-dimensional structural schematic diagram proposed by the present utility model;

[0015] Figure 2 is a three-dimensional split structural schematic diagram proposed by the present utility model;

[0016] Figure 3 is a three-dimensional structural schematic diagram of the insulating sleeve proposed by the present utility model;

[0017] Figure 4 is a three-dimensional structural schematic diagram of the insulating plate proposed by the present utility model.

[0018] In the figure: 1, syringe barrel; 2, needle shaft; 2011, contact end; 2012, clamping end; 201, insulating sleeve; 202, insulating plate; 203, sliding hole; 204, tension spring; 205, abutting block; 3, threaded column. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0020] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] Please refer to the attached Figure 1 - attached Figure 4, A spring - type contact probe, comprising a barrel 1. Inside the barrel 1, a resilience component is provided. The resilience component includes a needle shaft 2, an insulating sleeve 201, and an insulating plate 202 disposed inside the barrel 1. Both the insulating sleeve 201 and the insulating plate 202 are made of plastic. The insulating sleeve 201 is slidably arranged inside the barrel 1. A sliding hole 203 is formed in the top surface of the insulating sleeve 201. The insulating plate 202 is fixed inside the barrel 1 and is also sleeved inside the sliding hole 203.

[0022] In an embodiment, a tension spring 204 is fixed on one side of the insulating plate 202 close to the rear end of the barrel 1. One end of the tension spring 204 is fixed to one side of the sliding hole 203. A contact block 205 is fixed at the front end of the sliding hole 203. The front end of the contact block 205 abuts against the rear end of the needle shaft 2. By providing the insulating sleeve 201, the insulating plate 202, and the tension spring 204, the elastic part (spring) of the traditional spring - type contact probe is replaced with the tension spring 204. Then, the insulating sleeve 201 and the insulating plate 202 are used to isolate the tension spring 204 from the barrel 1, so that no current passes through the tension spring 204. By taking advantage of the high stability of the tension spring 204 in the stretching and contracting states, it is possible to effectively prevent the tension spring 204 from bending and contacting the inner wall of the barrel 1 during use without setting any support mechanism, thus preventing current from passing through the tension spring 204 and increasing the reliability of the device.

[0023] In an embodiment, the needle shaft 2 includes a contact end 2011 at the front end and a clamping end 2012 at the rear end. The diameter of the clamping end 2012 is larger than that of the contact end 2011. The clamping end 2012 is in clearance fit with the inside of the barrel 1. By providing the clearance fit between the clamping end 2012 and the inside of the barrel 1, the needle shaft 2 is clamped inside the barrel 1, ensuring that the needle shaft 2 will not fall out of the inside of the barrel 1.

[0024] In an embodiment, the rear side of the clamping end 2012 is of an inclined - plane structure, and the contact block 205 is of a solid semi - circular structure. By providing the inclined - plane structure on the rear side of the clamping end 2012 and the solid semi - circular structure of the contact block 205, when the clamping end 2012 presses the contact block 205, the whole needle shaft 2 will fit against the inner wall of the barrel 1, ensuring the flow of current between the needle shaft 2 and the barrel 1.

[0025] In an embodiment, the distance from the front side of the insulating sleeve 201 to the front side inside the sliding hole 203 is greater than the distance from the rear end of the insulating sleeve 201 to the rear side inside the barrel 1. By providing that the distance from the front side of the insulating sleeve 201 to the front side inside the sliding hole 203 is greater than the distance from the rear end of the insulating sleeve 201 to the rear side inside the barrel 1, it is ensured that the recoverable distance of the tension spring 204 is greater than the telescopic distance of the needle shaft 2, so that the probe always maintains a flexible contact with the product to be measured.

[0026] In an embodiment, a threaded post 3 is fixed to the rear end of the syringe 1. Through the setting and use of the threaded post 3, it is convenient to install the probe and the detection mechanism together.

[0027] Working principle: During use, the detection mechanism drives the probe to approach the product to be tested, and makes the contact end 2011 of the needle shaft 2 contact the product to be tested. At this time, the detection mechanism pushes the syringe 1 downward, and the insulating plate 202 moves along with the movement of the syringe 1. Since the contact end 2011 contacts and presses the product to be tested, the needle shaft 2, the abutting block 205 and the insulating sleeve 201 slide backward toward the rear end of the syringe 1 as a whole, so that the tension spring 204 is stretched, and the tension spring 204 applies a restoring force to the insulating sleeve 201 in the direction of the front end of the syringe 1, so that the insulating sleeve 201 drives the abutting block 205 to press against the clamping end 2012. Since the rear side of the clamping end 2012 is a bevel structure and the abutting block 205 is a solid semi-circular structure, the whole needle shaft 2 will fit against the inner wall of the syringe 1, ensuring that the current flows between the needle shaft 2 and the syringe 1. At this time, the current flows through the needle shaft 2 to the syringe 1 and finally is input to the detection mechanism, thus completing the test operation. By setting the internal clearance fit between the clamping end 2012 and the syringe 1, the needle shaft 2 is clamped inside the syringe 1, ensuring that the needle shaft 2 will not fall out of the inside of the syringe 1. By setting the distance from the front side of the insulating sleeve 201 to the front side inside the sliding hole 203 to be greater than the distance from the rear end of the insulating sleeve 201 to the rear side inside the syringe 1, it is ensured that the elastic recovery distance of the tension spring 204 is greater than the telescopic distance of the needle shaft 2, so that the probe and the product to be tested always maintain a flexible contact. Through the setting and use of the threaded post 3, it is convenient to install the probe and the detection mechanism together.

[0028] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A spring-type contact probe, comprising a syringe (1), characterized in that: The syringe (1) is provided with a rebound component inside, the rebound component comprising a needle shaft (2) arranged inside the syringe (1), an insulating sleeve (201) and an insulating plate (202), the insulating sleeve (201) being slidably arranged inside the syringe (1), a sliding hole (203) being provided on the top surface of the insulating sleeve (201), the insulating plate (202) being fixed inside the syringe (1), and the insulating plate (202) being also sleeved inside the sliding hole (203).

2. A spring-type contact probe according to claim 1, characterized in that: A tension spring (204) is fixed to one side of the insulating plate (202) close to the rear end of the syringe (1); one end of the tension spring (204) is fixed to one side of the sliding hole (203); a contact block (205) is fixed to the front end of the sliding hole (203); and the front end of the contact block (205) contacts the rear end of the needle shaft (2).

3. A spring-type contact probe according to claim 2, characterized in that: The needle shaft (2) comprises a contact end (2011) at the front end and a clamping end (2012) at the rear end. The diameter of the clamping end (2012) is larger than that of the contact end (2011). The clamping end (2012) is in clearance fit with the inner part of the syringe (1).

4. A spring-type contact probe according to claim 3, characterized in that: The rear side of the clamping end (2012) is a sloped structure, and the abutment block (205) is a solid semicircular structure.

5. A spring-type contact probe according to claim 4, characterized in that: The distance from the front side of the insulating sleeve (201) to the front side of the interior of the sliding hole (203) is greater than the distance from the rear end of the insulating sleeve (201) to the rear side of the interior of the syringe (1).

6. A spring-type contact probe according to claim 5, characterized in that: A threaded column (3) is fixed to the rear end of the syringe (1).

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