Contact-stable spring needle

Abstract

The application discloses a contact stable spring needle, which comprises a needle head, a main body and a needle tail which are connected with each other, the needle head is in contact with a contact terminal of a connector, the needle head comprises a supporting part and a first contact part and a second contact part which are connected with the supporting part respectively, a U-shaped groove is arranged between the first contact part and the second contact part, a first inclined surface is arranged on the first contact part, a second inclined surface is arranged on the second contact part, the bottom end of the first inclined surface is connected with one top end of the U-shaped groove, and the bottom end of the second inclined surface is connected with the other top end of the U-shaped groove; the main body comprises a first elastic bending part, a solid part and a second elastic bending part, the first elastic bending part is connected with the supporting part of the needle head, and the second elastic bending part is connected with the needle tail. The application solves the problem that the debris generated by the abrasion between the needle tip and the measured object in the pressing process cannot be discharged, thereby affecting the test and even affecting the conduction.

Description

Technical Field

[0001] This invention relates to the technical field of semiconductor conduction testing structures, and more specifically to a contact-stable spring pin. Background Technology

[0002] Spring-loaded pins are commonly used in test sockets to ensure precise contact with the connector terminals of the device under test (DUT) for stable signal transmission. They are typically used in electronic products such as camera modules, LCD modules, under-display fingerprint modules, and PCB connectors. However, the spacing between the two rows of contact terminals in these connectors is extremely small, usually only a few tenths of a millimeter. This makes them prone to short circuits due to bending or misalignment of the spring-loaded pins. Furthermore, wear and tear between the pin tips and the DUT during the pressing process can generate debris that cannot be expelled, affecting testing and even conductivity. Additionally, the contact surface of each terminal is very narrow, only a few tenths of a millimeter, resulting in poor contact stability between the connector terminals and the spring-loaded pins, impacting the reliability of the DUT testing. Summary of the Invention

[0003] To overcome the aforementioned problems, the present invention aims to provide a contact-stable spring needle that solves the problem that the wear between the needle tip and the object being tested during the pressing process generates debris that cannot be discharged, thus affecting the test or even the conductivity.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is: a contact-stable spring pin, comprising a pin head, a body, and a pin tail connected to each other, wherein the pin head contacts the contact terminal of the connector.

[0005] The needle includes a support portion and a first contact portion and a second contact portion respectively connected to the support portion, and a U-shaped groove is provided between the first contact portion and the second contact portion.

[0006] The first contact portion is provided with a first inclined surface, and the second contact portion is provided with a second inclined surface. The bottom end of the first inclined surface is connected to one of the top ends of the U-shaped groove, and the bottom end of the second inclined surface is connected to the other top end of the U-shaped groove.

[0007] The main body includes a first elastically bent portion, a solid portion, and a second elastically bent portion. The first elastically bent portion is connected to the support portion of the needle tip, and the second elastically bent portion is connected to the needle tail.

[0008] Preferably, the first inclined surface, the U-shaped groove, and the second inclined surface together form a connecting groove.

[0009] Preferably, both the first inclined plane and the second inclined plane are set at a preset angle.

[0010] Preferably, both the first elastic bending portion and the second elastic bending portion are capable of elastic extension and contraction along the direction from the needle tip to the needle tail.

[0011] Preferably, both the first elastic bending portion and the second elastic bending portion are composed of C-shaped elastic portions connected end to end.

[0012] Preferably, the number of C-shaped elastic portions in the first elastic bending portion is less than the number of C-shaped elastic portions in the second elastic bending portion.

[0013] The beneficial effects of this invention are: the debris generated by the friction between the needle tip and the object being tested during the pressing process can be discharged in time, without accumulation that would affect the test, thus making the contact more reliable; at the same time, the addition of a solid part in the middle of the main body makes the deformation position of the first elastic bending part and the second elastic bending part more fixed each time they are pressed, ensuring the consistency of elasticity and electrical performance, and also solving the problem of inconsistent deformation of the pressing coil due to the tolerance of the mounting groove or its own machining tolerance, resulting in differences in elasticity and poor electrical performance. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this embodiment;

[0015] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0016] Figure 3 This is a schematic diagram of the working state of the device in contact with the contact terminal in this embodiment;

[0017] Figure 4 for Figure 3 Enlarged view of section B in the middle.

[0018] In the figure: 1. Needle tip; 2. Body; 3. Needle tail; 4. Contact terminal; 5. Support part; 6. First contact part; 7. Second contact part; 8. U-shaped groove; 9. First inclined surface; 10. Second inclined surface; 11. First elastic bending part; 12. Solid part; 13. Second elastic bending part; 14. Contact bottom end; 15. Contact side. Detailed Implementation

[0019] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more explicit definition of the scope of protection of the present invention.

[0020] See Figures 1-4 As shown, this embodiment discloses a contact-stable spring pin, including a pin head 1, a body 2, and a pin tail 3 connected to each other. The pin head 1 contacts the contact terminal 4 of the connector.

[0021] The needle 1 includes a support portion 5 and a first contact portion 6 and a second contact portion 7 respectively connected to the support portion 5. A U-shaped groove 8 is provided between the first contact portion 6 and the second contact portion 7.

[0022] The first contact portion 6 is provided with a first inclined surface 9, and the second contact portion 7 is provided with a second inclined surface 10. The bottom end of the first inclined surface 9 is connected to one of the top ends of the U-shaped groove 8, and the bottom end of the second inclined surface 10 is connected to the other top end of the U-shaped groove 8. The first inclined surface 9, the U-shaped groove 8, and the second inclined surface 10 together form a connecting groove. The first inclined surface 9 and the second inclined surface 10 are both set at a preset angle.

[0023] The main body 2 includes a first elastic bending portion 11, a solid portion 12, and a second elastic bending portion 13. The first elastic bending portion 11 is connected to the support portion 5 of the needle tip 1, and the second elastic bending portion 13 is connected to the needle tail 3. Both the first elastic bending portion 11 and the second elastic bending portion 13 can elastically extend and retract along the direction from the end of the needle tip 1 to the end of the needle tail 3. The solid portion 12 can fix the deformation position of the first elastic bending portion 11 and the second elastic bending portion 13, stabilize the electrical performance of the spring needle, and maintain good consistency of the downward pressure force.

[0024] Both the first elastic bending portion 11 and the second elastic bending portion 13 are composed of C-shaped elastic portions connected end to end, and the number of C-shaped elastic portions in the first elastic bending portion 11 is less than the number of C-shaped elastic portions in the second elastic bending portion 13.

[0025] During use, the tip 1 of the needle contacts the contact terminal 4 of the connector. The bottom contact end 14 of the contact terminal 4 is a flat surface, and the contact side surfaces 15 on both sides of the contact terminal 4 are a combination of arc and straight lines. The actual contact surfaces of the contact terminal 4 with the spring pin are the bottom contact end 14 and the two contact side surfaces 15, which contact the first inclined surface 9 and the second inclined surface 10. During the pressing process, since the center lines of the first elastic bending part 11 and the second elastic bending part 13 are not on the same straight line as the needle tip 1 and the needle tail 3, the support part 5 may rotate slightly. Therefore, the first inclined surface 9 and the second inclined surface 10 will scrape against the bottom contact end 14 and the contact side surfaces 15 during the pressing process, thereby generating debris.

[0026] The debris is discharged into the U-shaped groove 8 under the pressure of the movement of the contact bottom 14, which facilitates the removal of debris. This is a significant improvement over the traditional grooveless needle tip structure, which is affected by the accumulation of debris at the root during the test, resulting in a failure to conduct or even conduction.

[0027] During compression, the solid part 12 separates the first elastic bending part 11 and the second elastic bending part 13. The first elastic bending part 11 and the second elastic bending part 13 are connected end to end by C-shaped elastic parts and have fewer coils. Both the first elastic bending part 11 and the second elastic bending part 13 exhibit C-shaped bending, and the spring needle as a whole exhibits C-shaped bending. The position of the compression coil deformation is relatively fixed. Compared with the traditional spring needle with more coils in the elastic bending part, which usually exhibits S-shaped bending during the pressing process and has a greater impact on the elastic force, this also greatly improves the situation.

[0028] The application of spring needles places high demands on signal transmission stability. The stability of signal transmission is directly related to the shape of the spring needle under test conditions. Therefore, this invention can make the signal transmission more stable in actual working process, and at the same time, the elasticity is better consistent. Good elasticity consistency will make the wear life of the spring needle tip more stable.

[0029] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A contact-stable spring pin, comprising a pin head, a body, and a pin tail connected to each other, wherein the pin head contacts a contact terminal of a connector, characterized in that, The needle includes a support portion and a first contact portion and a second contact portion respectively connected to the support portion, and a U-shaped groove is provided between the first contact portion and the second contact portion. The first contact portion is provided with a first inclined surface, and the second contact portion is provided with a second inclined surface. The bottom end of the first inclined surface is connected to one of the top ends of the U-shaped groove, and the bottom end of the second inclined surface is connected to the other top end of the U-shaped groove. The main body includes a first elastically bent portion, a solid portion, and a second elastically bent portion. The first elastically bent portion is connected to the support portion of the needle tip, and the second elastically bent portion is connected to the needle tail.

2. The contact-stabilized spring pin according to claim 1, characterized in that, The first inclined surface, the U-shaped groove, and the second inclined surface together form a connecting groove.

3. The contact-stabilized spring pin according to claim 1, characterized in that, Both the first inclined plane and the second inclined plane are set at a preset angle.

4. The contact-stabilized spring pin according to claim 1, characterized in that, Both the first elastic bending portion and the second elastic bending portion are capable of elastic expansion and contraction along the direction from the needle tip to the needle tail.

5. The contact-stabilized spring pin according to claim 1, characterized in that, Both the first elastic bending portion and the second elastic bending portion are composed of C-shaped elastic portions connected end to end.

6. The contact-stabilized spring pin according to claim 5, characterized in that, The number of C-shaped elastic parts in the first elastic bending section is less than the number of C-shaped elastic parts in the second elastic bending section.

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