Spring type probe for precision stamping process

Abstract

The invention provides a spring type probe for a precision stamping process, and relates to the technical field of spring type probes. The spring type probe for the precision stamping process comprises a needle tube, a first needle head is arranged at the upper end of the needle tube in a sliding mode, a second needle head is arranged at the lower end of the needle tube in a sliding mode, inner side bayonets are fixedly formed in one side of the first needle head and one side of the second needle head, and a spring is arranged between the two inner side bayonets in a clamped mode. The ends of the two sides of the spring abut against one ends of the two inner side bayonets respectively, and a guide column is movably arranged in the spring in a sleeved mode. The structure of the probe is adjusted to be in a connection mode of the probe head, the needle tube, the spring and the guide column, meanwhile, the machining technology of the probe head, the needle tube and the guide column is adjusted to be in continuous punch forming, the reliability of electric connection is guaranteed, meanwhile, the manufacturing cost of products is greatly reduced, the production efficiency is improved in the geometric level, and the probe has the capacity of being flexibly adapted to various scenes.

Description

Technical Field

[0001] This invention relates to the field of spring probe technology, specifically a spring probe manufactured using a precision stamping process. Background Technology

[0002] A spring-loaded probe is a spring-type probe made of three parts: a needle shaft, a spring, and a needle tube, riveted together. The surface is usually gold-plated to enhance corrosion resistance and electrical performance. It achieves elastic contact through an internal precision spring structure and is mainly used for current and signal transmission in electronic devices. It has advantages such as small size, light weight, stable contact, long life, and adaptability to various installation methods. It is widely used in mobile phones, automotive electronics, medical and aerospace fields.

[0003] Existing patent (publication number: CN109787012A) discloses "a spring probe comprising a needle tube, a needle tip whose tail end is locked inside the needle tube and can move along the needle tube axis, and a spring disposed between the front end of the needle tip and the bottom of the needle tube and applying a pushing force to the needle tip. The open end of the needle tube is provided with a plurality of elastic plates circumferentially, and the inner side of the elastic plates is provided with a first flange to prevent the needle tip from detaching from the needle tube. Under the elastic force of the elastic plates, the first flange is pressed against the outer wall of the needle tip. The outer wall of the tail end of the needle tip is provided with a second flange, which, under the action of the spring, can abut against the first flange. The spring probe of this invention has low impedance, stable electrical contact between the needle tip and the needle tube, is suitable for high-frequency, high-current signal transmission, and is easy to assemble, which helps to improve assembly efficiency."

[0004] In the process of realizing this application, the inventors discovered that the prior art has the following problems: most existing spring probes adopt the traditional connection method of needle + needle tube + spring combination, and the processing technology of needle, needle tube and spring are all CNC machine tool processing. Since the parts of spring probe such as needle and needle tube are gold plated, electroplating cannot be localized when processed by CNC machine tool, resulting in high overall processing cost. At the same time, the overall efficiency of parts production and finished product assembly is low, resulting in low overall production efficiency of spring probe and high product cost, which indirectly affects the irreversible waste of non-renewable precious metals. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a spring-type probe using a precision stamping process, which solves the problems of low production efficiency and high processing costs of existing spring-type probes.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solution: a spring-type probe using a precision stamping process, comprising a needle tube, wherein a first needle is slidably disposed at the upper end of the needle tube, and a second needle is slidably disposed at the lower end of the needle tube;

[0007] Both the No. 1 and No. 2 needles have an inner locking slot fixedly installed on one side. A spring is engaged between the two inner locking slots. The two ends of the spring abut against one end of the two inner locking slots respectively. A guide post is movably sleeved inside the spring.

[0008] Preferably, the first needle, the second needle, the needle tube, and the guide post are all manufactured using a continuous stamping forming process.

[0009] Preferably, the spring is manufactured using CNC machine tool processing technology.

[0010] Preferably, the first needle, the second needle, and the syringe are all made of copper alloy.

[0011] Preferably, both the spring and the guide post are made of stainless steel.

[0012] Preferably, the first and second needles are symmetrically designed and have the same shape, and the tip structure of the first and second needles is an arc shape formed by the two sides snapping together.

[0013] Preferably, the connection between the first needle and the second needle and the needle tube is that the first needle and the second needle are connected by a stamped protrusion forming a one-way locking position with the closed area of ​​the needle tube.

[0014] Preferably, the needle tube has a symmetrical design, and the waist of the needle tube has a drum-shaped structure that can be flexibly adjusted according to different application scenarios.

[0015] Working principle: When assembling this spring-type probe, first place the No. 1 needle in the positioning groove of the assembly fixture, ensuring that the inner bayonet faces upward. Put the spring into the inner bayonet of the positioned No. 1 needle, so that one end of the spring abuts against the end face of the bayonet. At the same time, it should be noted that the spring should not go all the way down, but should be limited by the bayonet. Insert the guide post along the center of the spring. The guide post and the spring are fitted with a gap, which plays a guiding and anti-deviation role. Take the No. 2 needle, align its inner bayonet with the other end of the spring, and gently press to compress the spring until the outer stamped protrusion of the No. 2 needle is aligned with the closed area of ​​the needle tube. Put the needle tube in from one end, so that the stamped protrusions of the two needles respectively engage with the one-way locking positions of the upper and lower closed openings of the needle tube.

[0016] During use, needles #1 and #2 extend outwards from both ends of the needle tube under the preload of the spring, forming bidirectional elastic contact ends. The guide post, located inside the spring, acts as a radial limiter, preventing the spring from buckling or shifting during compression. When the external mating component presses against the needle from either side, the needle on that side slides along the inner wall of the needle tube, compressing the spring. The elastic deformation of the spring absorbs mechanical tolerances and vibration shocks, ensuring a stable, low-impedance electrical contact between the needle and the mating component. Because needles #1 and #2 are symmetrically designed, and the spring and guide post are centrally located, the electrical signal can be bidirectionally transmitted through the path "needle → spring → guide post → other needle," regardless of which end the pressure is applied to. The guide post, acting as a rigid support, evenly distributes the spring force to both ends, avoiding localized stress concentration. The stamped boss on the outer wall of the needle and the one-way locking structure in the needle tube closure area form a mechanical limit. When the needle is compressed and retracts, the boss is blocked to prevent the needle from sliding completely into the syringe. When the external force disappears, the spring returns the needle to its initial position, enabling cyclic use. The syringe waist adopts an adjustable drum-shaped structure, which can be inserted into the device hole structure by interference fit, or surface mount fixation can be achieved by utilizing the elastic deformation of the drum-shaped area.

[0017] This invention provides a spring-loaded probe for precision stamping. It offers the following advantages:

[0018] 1. This invention provides a spring-type probe using a precision stamping process. By adjusting the probe structure to a connection form of needle head + needle tube + spring + guide post, and adjusting the processing technology of needle head, needle tube and guide post to continuous stamping, the invention achieves a significant reduction in cost and a geometric increase in production efficiency while ensuring the reliability of electrical connection, and has the ability to flexibly adapt to various scenarios. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a front view schematic diagram of the overall structure of the present invention;

[0021] Figure 3 This is a schematic diagram showing the structural breakdown of the present invention;

[0022] Figure 4 This is a schematic cross-sectional view of the entire invention;

[0023] Figure 5 This is a schematic diagram of the structure of the No. 1 needle of the present invention;

[0024] Figure 6 This is a schematic diagram of the needle tube of the present invention.

[0025] Among them, 1. No. 1 needle; 2. needle tube; 3. spring; 4. guide post; 5. No. 2 needle; 6. inner bayonet. Detailed Implementation

[0026] 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 some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] like Figure 1-6 As shown, this embodiment of the invention provides a spring-type probe for precision stamping process, including a needle tube 2, a first needle 1 slidably disposed at the upper end of the needle tube 2, and a second needle 5 slidably disposed at the lower end of the needle tube 2;

[0028] Both needle 1 and needle 5 have an inner latch 6 fixedly installed on one side. A spring 3 is engaged between the two inner latches 6. The two ends of the spring 3 abut against one end of the two inner latches 6 respectively. A guide post 4 is movably sleeved inside the spring 3.

[0029] Specifically, by adding a guide post 4 inside the spring 3, when the spring 3 is small, it is easy for the spring 3 to deform under the compression force of the first needle 1 and the second needle 5. Adding the guide post 4 can effectively avoid this phenomenon. At the same time, it can increase the effective number of times the spring 3 is subjected to pressure and its service life. The spring 3 is fixed by the end of the spring 3 abutting against the inner bayonet 6 stamped inside the first needle 1 and the second needle 5. This is to support the natural stroke of the spring 3 inside the product.

[0030] Needle 1, needle 2, needle tube 2, and guide post 4 are all made using continuous stamping forming process. Spring 3 is made using CNC machine tool processing. Needle 1, needle 2, and needle tube 2 are all made of copper alloy material. Spring 3 and guide post 4 are both made of stainless steel material.

[0031] Specifically, by adopting a continuous stamping process, the shape, size, and structure can be flexibly adjusted to meet different application scenarios. Compared with similar products on the market, the cost is significantly reduced, and production efficiency is greatly improved while ensuring effective and stable electrical signal connection.

[0032] Needle 1 and needle 5 are symmetrically designed and have the same shape. The tip structure of both needles 1 and needle 5 is an arc shape formed by the two sides snapping together.

[0033] Specifically, the top structure of needle 1 and needle 5 is that the two sides snap together in an arc shape. This is for better electrical signal transmission and connection with the mating parts. Needle 1 and needle 5 are the same product and have a symmetrical design. This is so that there is no need to consider the error-proofing problem during assembly and production, and it can reduce production and management costs.

[0034] The connection between needle 1 and needle 5 and needle tube 2 is that needle 1 and needle 5 are connected by a stamped boss on the outside of needle 1 and needle 5 to form a one-way locking position with the closed area of ​​needle tube 2.

[0035] Specifically, this connection method can prevent needle 1 and needle 5 from detaching from needle tube 2 after they are assembled with needle tube 2.

[0036] The needle tube 2 has a symmetrical design, and the waist of the needle tube 2 is a drum-shaped structure that can be flexibly adjusted according to the needs of different application scenarios.

[0037] Specifically, the needle tube 2 has a symmetrical design. This is to eliminate the need to consider error prevention during assembly and production, and to reduce production and management costs. The waist of the needle tube 2 is an adjustable drum shape. This allows the spring needle product to be assembled with other hole-type components to meet different application scenarios, and can also serve to fix the product to other hole-type structural components.

[0038] Although embodiments of the 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 invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spring probe for a precision stamping process comprising a needle tube (2), characterized in that: The upper end of the needle tube (2) is slidably provided with a first needle (1), and the lower end of the needle tube (2) is slidably provided with a second needle (5); The first needle (1) and the second needle (5) are fixedly provided with inner side sockets (6) on one side, and a spring (3) is connected between the two inner side sockets (6), and the spring (3) is abutted against one end of the two inner side sockets (6), and the spring (3) is movably sleeved with a guide column (4).

2. A spring probe for a precision stamping process according to claim 1, wherein: The first needle (1), the second needle (5), the needle tube (2) and the guide column (4) are all made of continuous stamping forming process.

3. The spring probe of claim 1, wherein: the spring probe is configured to be used in a precision stamping process. The spring (3) is made of numerical control machine tool processing technology.

4. The spring probe of claim 1, wherein: the spring probe is configured to be used in a precision stamping process. The first needle (1), the second needle (5) and the needle tube (2) are all made of copper alloy material.

5. The spring probe of claim 1 wherein: the spring probe is a precision stamping process. The spring (3) and the guide column (4) are all made of stainless steel material. ​ 6. The spring probe of claim 1 wherein: The first needle (1) and the second needle (5) are symmetrically designed, and the shapes are the same, and the tip structures of the first needle (1) and the second needle (5) are arc-shaped with two edges buckled.

7. The spring probe of claim 1 wherein: the spring probe is a precision stamping process. The connection mode of the first needle (1) and the second needle (5) with the needle tube (2) is that the one-way clamping is formed between the outer part of the first needle (1) and the second needle (5) and the closed port area of the needle tube (2) through stamping bosses.

8. The spring probe of claim 1 wherein: The structure of the needle tube (2) is symmetrically designed, and the waist of the needle tube (2) is a drum-shaped structure which can be flexibly adjusted according to different application scenarios.

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