A zero-insertion three-prong spring sheet

Abstract

The utility model provides a kind of zero plugging three claw spring piece, including main component, the main component includes adapter PCB insertion section, U-shaped positioning section, intermediate clamp jaw, side clamp jaw, clamping part and welding portion;The front surface bottom of the U-shaped positioning section is provided with adapter PCB insertion section, and the rear surface bottom of the U-shaped positioning section is provided with intermediate clamp jaw.The utility model is realized by adopting the elastic deformation of side clamp jaw and intermediate clamp jaw that pin is automatically in position, without traditional plugging action, while clamping part end is provided with smooth inverted triangular structure, eliminates sharp contact point, ensures that chip pin zero damage in testing process;Through two side clamping parts and intermediate arc-shaped clamping block form stable triangular area, utilize the resilience of elastic clamp jaw to evenly compress pin, contact resistance fluctuation is less than 5mΩ, can stably bear more than 10A large current test, cooperate U-shaped positioning section and the double limiting structure of symmetrical barb, avoid spring piece displacement, guarantee the stability and accuracy of signal transmission.

Description

Technical Field

[0001] This utility model relates to the field of electronic component testing technology, and in particular to a zero-insertion-removal three-claw spring contactor. Background Technology

[0002] In the field of electronic component manufacturing and testing, testing is a crucial process for ensuring product reliability. With the rapid development of integrated circuit technology, the integration and precision of electronic components are constantly improving, placing higher demands on the accuracy, stability, and component protection of testing equipment. Especially in conductivity testing scenarios, the test spring, as a core component connecting the component under test to the test circuit, directly affects testing efficiency, result accuracy, and component lifespan through its structural design.

[0003] In existing technologies, traditional test springs for zero insertion / removal testing scenarios have significant drawbacks: on the one hand, traditional springs are prone to scratching the tested object (such as precision structures like chip pins) due to mechanical friction during insertion / removal or clamping, leading to damage to the electrical performance of the component or even scrapping it; on the other hand, their clamping force stability is insufficient, making it difficult to maintain reliable contact in high-current testing, which may cause problems such as contact resistance fluctuations and test result deviations, thus restricting the efficient testing of high-power electronic components; to address this, a zero insertion / removal three-jaw spring is proposed. Utility Model Content

[0004] In view of this, the present invention aims to provide a zero-insertion three-claw spring to solve or alleviate the technical problems existing in the prior art, or at least provide a beneficial alternative.

[0005] The technical solution of this utility model embodiment is implemented as follows: a zero-insertion three-jaw spring sheet, including a main body assembly, the main body assembly including a PCB insertion section, a U-shaped positioning section, a middle jaw, a side jaw, a clamping part, an arc-shaped clamping block, barbs and a welding part;

[0006] The bottom of the front surface of the U-shaped positioning section is provided with a PCB insertion section, the bottom of the rear surface of the U-shaped positioning section is provided with a middle gripper, both sides of the rear surface of the U-shaped positioning section are provided with side grippers, the rear part of the two side grippers that are close to each other is provided with a clamping part, the rear surface of the middle gripper is provided with an arc-shaped clamping block, the middle of both sides of the upper surface of the U-shaped positioning section is provided with barbs, and the front surface of the PCB insertion section is provided with a soldering part.

[0007] More preferably, the adapter PCB insertion section, U-shaped positioning section, middle gripper and side gripper are integrally formed conductive metal parts.

[0008] More preferably, both the side grippers and the middle grippers have elastic deformation capabilities.

[0009] More preferably, the two barbs are symmetrically distributed, and the end of the barb near the side gripper is provided with a beveled surface, the angle between the beveled surface and the upper surface of the U-shaped positioning section is 45°-60°.

[0010] More preferably, the two clamping parts are protrusions that bend towards the central jaw, and the two clamping parts cooperate with the arc-shaped clamping block to form a triangular clamping area.

[0011] More preferably, the connection between the side gripper and the middle gripper and the U-shaped positioning section is provided with an arc transition portion.

[0012] More preferably, the end of the clamping part has a smooth inverted triangular structure.

[0013] The present invention has the following advantages due to the adoption of the above technical solution:

[0014] This invention achieves automatic pin positioning by using the elastic deformation of the side grippers and the middle grippers, eliminating the need for traditional insertion and removal actions. At the same time, the end of the clamping part is provided with a smooth inverted triangular structure to eliminate sharp contact points and ensure zero damage to the chip pins during the test.

[0015] This invention forms a stable triangular region through the clamping parts on both sides and the arc-shaped clamping block in the middle. The elastic claws use their rebound force to evenly press the pins, with contact resistance fluctuation of less than 5mΩ. It can stably withstand high current tests of 10A or more. Combined with the dual positioning mechanism of U-shaped positioning section and symmetrical barbs, it avoids the spring piece from shifting and ensures the stability and accuracy of signal transmission.

[0016] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present invention will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a structural view of the present invention from one perspective;

[0019] Figure 2 This is another structural view of the present invention.

[0020] Reference numerals: 1. Main component; 11. Adapter PCB insertion section; 12. U-shaped positioning section; 13. Middle gripper; 14. Side gripper; 15. Clamping part; 16. Arc-shaped clamping block; 17. Barb; 18. Welding part; 19. Angled part; 20. Arc transition part. Detailed Implementation

[0021] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this invention. Therefore, the drawings and description are considered exemplary in nature and not restrictive.

[0022] The embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0023] like Figures 1-2 As shown, this utility model embodiment provides a zero-insertion-removal three-jaw spring, including a main body component 1. The main body component 1 includes a PCB insertion section 11, a U-shaped positioning section 12, a middle jaw 13, a side jaw 14, a clamping part 15, an arc-shaped clamping block 16, barbs 17, and a welding part 18.

[0024] The bottom of the front surface of the U-shaped positioning section 12 is provided with a PCB insertion section 11, the bottom of the rear surface of the U-shaped positioning section 12 is provided with a middle gripper 13, both sides of the rear surface of the U-shaped positioning section 12 are provided with side grippers 14, the rear part of the side grippers 14 that are close to each other is provided with a clamping part 15, the rear surface of the middle gripper 13 is provided with an arc-shaped clamping block 16, the middle of both sides of the upper surface of the U-shaped positioning section 12 is provided with barbs 17, and the front surface of the PCB insertion section 11 is provided with a soldering part 18.

[0025] In one embodiment, specifically: the adapter PCB insertion section 11, the U-shaped positioning section 12, the intermediate gripper 13, and the side gripper 14 are integrally formed conductive metal parts; traditional segmented structures require assembly through processes such as welding and riveting, which poses a risk of breakage at the connection points; the integrally formed design of the adapter PCB insertion section 11, the U-shaped positioning section 12, the intermediate gripper 13, and the side gripper 14 avoids the interface defects of multi-part assembly, ensuring that the spring maintains structural integrity during long-term elastic deformation (such as high-frequency action of clamping pins), and is especially suitable for vibration environments or high-load testing scenarios.

[0026] In one embodiment, specifically: both the side gripper 14 and the middle gripper 13 have elastic deformation capability; wherein, the side gripper 14 and the middle gripper 13 are made of conductive metal material (such as beryllium copper or phosphor bronze) integrally formed with the U-shaped positioning section 12. This type of material has both high conductivity and elastic limit, and can withstand tens of thousands of elastic deformations without failure, meeting the durability requirements of industrial-grade testing.

[0027] In one embodiment, specifically: two barbs 17 are symmetrically distributed, and one end of the barb 17 near the side gripper 14 is provided with a beveled surface 19, the angle between the beveled surface 19 and the upper surface of the U-shaped positioning section 12 is 45°-60°; by symmetrically arranging the two barbs 17 on both sides of the upper surface of the U-shaped positioning section 12, it is ensured that the spring piece is subjected to uniform force in the positioning hole of the device base, avoiding the spring piece from tilting or shifting due to unilateral force, thus improving positioning accuracy and stability; the beveled surface 19 forms a wedge-shaped guide structure through its tilt angle (45°-60°), so that the barb 17 can smoothly cut into the edge of the positioning hole of the base during spring piece assembly, reducing assembly resistance and improving installation efficiency; when the barb 17 is fully inserted into the positioning hole, the non-beveled end of the barb 17 (the end away from the side gripper 14) forms an interference fit with the inner wall of the positioning hole, so that the spring piece is tightly fixed to the base, preventing the spring piece from exiting along the insertion direction, and with the structural limit of the U-shaped positioning section 12, a double anti-retraction structure is achieved.

[0028] In one embodiment, specifically: the two clamping portions 15 are protrusions bent towards the central jaw 13, and the two clamping portions 15 cooperate with the arc-shaped clamping block 16 to form a triangular clamping area; the protrusions of the two clamping portions 15 face the central jaw 13, thereby forming a three-point support structure with the arc-shaped clamping block 16 of the central jaw 13 (the two clamping portions 15 are two vertices, and the arc-shaped clamping block 16 is the third vertex), forming a stable triangular mechanical model; when the pin is inserted, the two clamping portions 15 elastically deform... After the pin is in place, the clamping part 15 and the arc-shaped clamping block 16 simultaneously press the pin from three directions with elastic rebound force, which can evenly distribute the clamping force and avoid excessive pressure on one side, which may cause pin deformation or poor contact. At the same time, there is no need for traditional insertion and removal actions during the pin insertion process. The elastic deformation of the clamping part 15 and the middle jaw 13 can be triggered by simply pressing down on the chip. The clamping is achieved by using the "passive opening → active tightening" mechanism, with no rigid friction throughout the process, which meets the design goal of "zero insertion and removal damage".

[0029] In one embodiment, specifically: the connection between the side gripper 14 and the middle gripper 13 and the U-shaped positioning section 12 is provided with an arc transition portion 20. The arc transition portion 20 can eliminate the stress concentration problem caused by the right angle connection, and prevent the spring from breaking from the connection portion due to repeated elastic deformation (such as the opening and closing action of the side gripper 14 and the middle gripper 13 when clamping the pin) during long-term use, thereby improving the structural durability. At the same time, the smooth transition structure makes the elastic deformation process of the side gripper 14 and the middle gripper 13 smoother, reduces deformation resistance, and ensures the reliability and consistency of the clamping action.

[0030] In one embodiment, specifically, the end of the clamping part 15 has a rounded inverted triangular structure.

[0031] In operation, this invention involves inserting the spring contact's PCB insertion section 11 into the corresponding slot on the PCB, and soldering it to the PCB pads via the soldering part 18. The integrated conductive metal material (the PCB insertion section 11, U-shaped positioning section 12, intermediate gripper 13, and side gripper 14 are integrated) establishes an electrical path between the spring contact and the external test circuit. The U-shaped positioning section 12 of the spring contact is aligned with the positioning hole on the device base, guided by the barbs 17 (symmetrically distributed, with a 45°-60° beveled portion 19 at the end furthest from the side gripper 14). The function is that when pressed, the barb is squeezed into the positioning hole along the bevel. At this time, the non-beveled end of the barb (the end away from the side gripper 14) forms an interference fit with the inner wall of the positioning hole, realizing the tight fit and fixation of the spring piece and the base. The arc transition part 20 can disperse the assembly stress and avoid structural damage. This design uses the guiding insertion of the bevel part 19 and the reverse clamping of the interference fit to doubly prevent the spring piece from exiting the positioning hole, ensuring structural stability during the test. When the pin of the chip under test is aligned with the triangular clamping area formed by the spring piece clamping part 15 and the arc-shaped clamping block 16, and the chip is placed downwards, The pin is pressed against the side grippers 14 (which have elastic deformation capability), causing the two side grippers 14 to open outwards, making room for the pin to enter; the pin continues to be pressed down until it contacts the middle gripper 13 (which also has elastic deformation capability). At this time, the middle gripper 13, under pressure, slightly retracts towards the U-shaped positioning section 12 due to its own elasticity; the side grippers 14, due to the deformation caused by the pin being squeezed in, tighten inwards through elastic rebound, causing the clamping part 15 (the protrusion bent towards the middle gripper 13, with a smooth inverted triangle at the end) to fit against both sides of the pin; finally, the arc-shaped clamping block 16 (the middle... The rear surface of the gripper 13 cooperates with the two side gripping parts 15 to form a triangular wrapping grip, using the elasticity of the metal to provide a stable gripping force, ensuring reliable electrical connection between the pin and the spring, and realizing stable transmission of test signals / high current; after the test is completed, the chip is removed upwards, the pin is removed from the gripping area, and the side gripper 14 and the middle gripper 13 automatically spring back to the initial open / supported state due to their elastic deformation capability; the spring remains connected to the adapter PCB and the device base, and can be reused for the next chip test, completing the "zero insertion and removal damage" test cycle.

[0032] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this utility model, and these should all be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A zero-insertion-removal three-jaw spring contact, characterized in that: It includes a main body component (1), which includes a PCB insertion section (11), a U-shaped positioning section (12), a middle gripper (13), a side gripper (14), a clamping part (15), an arc-shaped clamping block (16), barbs (17), and a welding part (18); The bottom of the front surface of the U-shaped positioning section (12) is provided with a PCB insertion section (11), the bottom of the rear surface of the U-shaped positioning section (12) is provided with a middle gripper (13), both sides of the rear surface of the U-shaped positioning section (12) are provided with side grippers (14), the rear part of the two side grippers (14) that are close to each other is provided with a clamping part (15), the rear surface of the middle gripper (13) is provided with an arc-shaped clamping block (16), the middle part of both sides of the upper surface of the U-shaped positioning section (12) is provided with barbs (17), and the front surface of the PCB insertion section (11) is provided with a soldering part (18).

2. The zero-insertion-removal three-jaw spring contact according to claim 1, characterized in that: The adapter PCB insertion section (11), U-shaped positioning section (12), middle clamp (13) and side clamp (14) are integrally formed conductive metal parts.

3. The zero-insertion-removal three-jaw spring contact according to claim 1, characterized in that: Both the side gripper (14) and the middle gripper (13) have elastic deformation capabilities.

4. The zero-insertion-removal three-jaw spring contact according to claim 1, characterized in that: The two barbs (17) are symmetrically distributed. One end of the barb (17) near the side gripper (14) is provided with a beveled part (19). The angle between the beveled part (19) and the upper surface of the U-shaped positioning section (12) is 45°-60°.

5. A zero-insertion-removal three-jaw spring according to claim 1, characterized in that: The two clamping parts (15) are protrusions that bend toward the middle jaw (13), and the two clamping parts (15) cooperate with the arc-shaped clamping block (16) to form a triangular clamping area.

6. The zero-insertion-removal three-jaw spring according to claim 1, characterized in that: The connection between the side gripper (14) and the middle gripper (13) and the U-shaped positioning section (12) is provided with an arc transition part (20).

7. A zero-insertion-removal three-jaw spring according to claim 5, characterized in that: The end of the clamping part (15) has a rounded inverted triangular structure.

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