A spring probe provided with a profile spring

Abstract

The utility model relates to test probe technical field, and disclose a spring probe with special-shaped spring, including the needle tube of cylinder, the needle head of coaxial sliding setting in the needle tube upper end inside, the needle tail of coaxial sliding setting in the needle tube lower end inside and the spring of setting between the needle head and the needle tail, the spring includes: upper fixed section, lower fixed section and curved section, the upper end of upper fixed section is coaxial and set in the bottom of needle head, the lower end of upper fixed section is connected with the upper end of curved section, the lower end of lower fixed section is coaxial and set in the top of needle tail, the upper end of lower fixed section is connected with the lower end of curved section, the curved section is the taper cylinder structure of middle thin, both ends thick, and the middle of this taper cylinder structure is eccentric to both ends setting, make needle head and needle tail closely adhere on the inner wall of needle tube, and then ensure reliable electrical connection.

Description

Technical Field

[0001] This utility model relates to the field of test probe technology, specifically a spring probe equipped with an irregularly shaped spring. Background Technology

[0002] A spring probe is a type of spring-loaded probe formed by riveting four basic components—a needle tube, a needle tip, a needle tail, and a spring—using precision equipment. The tail end of the needle tip is inserted into the needle tube, and under the action of the spring, the needle tip can move axially along the needle tube. Spring probes are key components of semiconductor testing equipment; although small in size, the reliability of their electrical connections is essential for ensuring normal testing.

[0003] In spring-loaded probes, although there are electrical connections between the needle tip, spring, and needle tail, as well as between the needle tip, needle tube, and needle tail, the distance between the needle tip and needle tail must be adjustable. Therefore, the needle tip, needle tail, and needle tube are often designed with a clearance fit structure. This poses a challenge to the reliable electrical connection between the chip under test and the testing machine. This fit structure can lead to poor contact between the needle tube and the needle tip or needle tail under certain conditions. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a spring probe with an irregularly shaped spring. By setting the irregularly shaped spring, the needle tip and needle tail are tightly attached to the inner wall of the needle tube, thereby ensuring a reliable electrical connection.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution: A spring probe with an irregularly shaped spring includes a cylindrical needle tube, a needle head coaxially slidably disposed inside the upper end of the needle tube, a needle tail coaxially slidably disposed inside the lower end of the needle tube, and an irregularly shaped spring disposed between the needle head and the needle tail. The irregularly shaped spring includes an upper fixed section, a lower fixed section, and a curved section. The upper end of the upper fixed section is coaxially disposed at the bottom of the needle head, and the lower end of the upper fixed section is connected to the upper end of the curved section. The lower end of the lower fixed section is coaxially disposed at the top of the needle tail, and the upper end of the lower fixed section is connected to the lower end of the curved section. The curved section is a conical structure that is thinner in the middle and thicker at both ends, and the middle of the conical structure is eccentrically disposed relative to its two ends, so that when the two ends of the curved section are subjected to inward pressure, the middle of the curved section can bend.

[0006] Preferably, the upper fixed segment and the lower fixed segment have the same diameter and are coaxially arranged, and the outer edge of the curved segment does not exceed the outer edges of the upper fixed segment and the lower fixed segment.

[0007] Preferably, the outer edge of one side of the curved segment is a straight line segment, and this straight line segment is aligned with the outer edges of the upper fixed segment and the lower fixed segment, while the outer edge of the other side of the curved segment is an arc segment.

[0008] Preferably, a predetermined gap is left between one side of the outer edge of the curved section and the inner wall of the needle tube.

[0009] Preferably, the needle includes a needle body and a needle rod, wherein the needle rod is coaxially disposed at the bottom of the needle body and the needle rod is inserted into the upper fixed section.

[0010] Preferably, the needle tail includes a needle tail body and a needle tail rod, wherein the needle tail rod is coaxially disposed on the top of the needle tail body, and the needle tail rod is inserted into the lower fixed section.

[0011] Compared with the prior art, the beneficial effects achieved by the spring probe with irregularly shaped springs in this utility model are: As the needle slides into the syringe, the two ends of the irregular spring are subjected to inward compressive force, causing the curved section to bend. The middle of the bent irregular spring bulges outward and presses against the side wall of the syringe, causing the two ends of the irregular spring to generate radial thrust opposite to the direction of the bulge in the middle of the irregular spring. This causes the needle tip and needle tail to tend to tilt. This tilting tendency makes the needle tip and needle tail fit tightly against the inner wall of the syringe, thereby ensuring a reliable electrical connection.

[0012] By setting a preset gap, the irregular spring will not exert radial thrust on the needle tip and needle tail before the protruding part in the middle of the irregular spring contacts the inner wall of the needle tube. This ensures stable probe connection while avoiding resistance to the sliding of the needle tip and needle tail. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the irregularly shaped spring of this utility model; Figure 3 This is a schematic diagram illustrating the working principle of this utility model; Figure 4 This is a schematic diagram of the structure of this utility model after removing the irregularly shaped spring.

[0014] The components are: 1. needle tube; 2. needle tip; 3. needle tail; 4. irregular spring; 5. preset gap; 2-1. needle tip body; 2-2. needle tip rod; 3-1. needle tail body; 3-2. needle tail rod; 4-1. upper fixed section; 4-2. lower fixed section; 4-3. bending section. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] This utility model provides the following technical solution: Combination Figures 1 to 3 As shown, this embodiment discloses a spring probe with an irregularly shaped spring, including a cylindrical needle tube 1, a needle head 2 coaxially slidably disposed inside the upper end of the needle tube 1, a needle tail 3 coaxially slidably disposed inside the lower end of the needle tube 1, and an irregularly shaped spring 4 disposed between the needle head 2 and the needle tail 3. The irregularly shaped spring 4 includes an upper fixed section 4-1, a lower fixed section 4-2, and a bent section 4-3. The upper end of the upper fixed section 4-1 is coaxially disposed at the bottom of the needle head 2, and the lower end of the upper fixed section 4-1 is connected to the upper end of the bent section 4-3. The lower end of the lower fixed section 4-2 is coaxially disposed at the top of the needle tail 3, and the upper end of the lower fixed section 4-2 is connected to the lower end of the bent section 4-3. The bent section 4-3 is a conical structure that is thinner in the middle and thicker at both ends, and the middle of the conical structure is eccentrically disposed relative to its two ends, so that when the two ends of the bent section 4-3 are subjected to inward pressure, the middle of the bent section 4-3 can bend.

[0017] As the needle tip 2 slides into the needle tube 1, the bottom of the needle tip 1 presses against the upper fixed section 4-1 at the top of the shaped spring 4, and the top of the needle tail 3 presses against the lower fixed section 4-2 at the bottom of the shaped spring 4, causing both ends of the shaped spring 4 to be subjected to inward compressive force. Because the curved section 4-3 in the middle of the shaped spring 4 is a conical structure that is thinner in the middle and thicker at both ends, and the middle of this conical structure is eccentrically positioned relative to its two ends, the curved section 4-3 bends. Since the two ends of the shaped spring 4 are fixed to the needle tip 2 and the needle tail 3 respectively, the shaped spring... The two ends of the spring 4 will not move radially, allowing the middle of the curved irregular spring 4 to bulge outward. The outward bulging part of the middle of the irregular spring 4 presses against the side wall of the needle tube 1, causing the two ends of the irregular spring 4 to generate radial thrust opposite to the direction of the middle bulge of the irregular spring 4. The two thrusts act on the bottom of the needle tip 2 and the top of the needle tail 3 respectively, thereby causing the needle tip 2 and the needle tail 3 to tilt. This tilting tendency makes the needle tip 2 and the needle tail 3 fit tightly against the inner wall of the needle tube 1, thereby ensuring a reliable electrical connection.

[0018] Specifically, in combination Figure 2As shown, the upper fixed section 4-1 and the lower fixed section 4-2 have the same diameter and are coaxially arranged, and the outer edge of the curved section 4-3 does not exceed the outer edges of the upper fixed section 4-1 and the lower fixed section 4-2.

[0019] The projection of the curved section 4-3 along the axis of the irregular spring 4 falls within the upper fixed section 4-1 and the lower fixed section 4-2, which facilitates the insertion of the irregular spring 4 into the needle tube 1 during installation.

[0020] Specifically, in combination Figure 2 As shown, the outer edge of one side of the curved segment 4-3 is a straight line segment, and this straight line segment is aligned with the outer edges of the upper fixed segment 4-1 and the lower fixed segment 4-2. The outer edge of the other side of the curved segment 4-3 is an arc segment.

[0021] The two ends of the curved section 4-3 are subjected to inward pressure. When the middle of the curved section 4-3 bends from the arc section to the straight section, the middle of the curved section 4-3 bulges outward and presses against the side wall of the needle tube 1.

[0022] Specifically, in combination Figure 1 As shown, the curved section 4-3 has a preset gap 5 between one side of the outer edge of the straight section and the inner wall of the needle tube 1.

[0023] By setting a preset gap 5, the irregular spring 4 will not exert radial thrust on the needle head 2 and needle tail 3 before the protruding part in the middle of the irregular spring 4 contacts the inner wall of the needle tube 1. This ensures stable probe connection while avoiding resistance to the sliding of the needle head 2 and needle tail 3.

[0024] Specifically, in combination Figure 4 As shown, the needle 2 includes a needle body 2-1 and a needle rod 2-2. The needle rod 2-2 is coaxially disposed at the bottom of the needle body 2-1, and the needle rod 2-2 is inserted into the upper fixed section 4-1.

[0025] The needle rod 2-2 is inserted into the upper fixed section 4-1, so that the upper end of the irregular spring 4 is fixed to the bottom of the needle 2, while restricting the radial movement of the upper end of the irregular spring 4.

[0026] Specifically, in combination Figure 4 As shown, the needle tail 3 includes: a needle tail body 3-1 and a needle tail rod 3-2. The needle tail rod 3-2 is coaxially arranged on the top of the needle tail body 3-1, and the needle tail rod 3-2 is inserted into the lower fixed section 4-2.

[0027] The needle tail rod 3-2 is inserted into the lower fixed section 4-2, so that the lower end of the irregular spring 4 is fixed to the top of the needle tail 3, while restricting the radial movement of the lower end of the irregular spring 4.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations may be made to these embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A spring probe with an irregularly shaped spring, comprising a cylindrical needle tube (1), a needle tip (2) coaxially slidably disposed inside the upper end of the needle tube (1), a needle tail (3) coaxially slidably disposed inside the lower end of the needle tube (1), and an irregularly shaped spring (4) disposed between the needle tip (2) and the needle tail (3), characterized in that: The irregular spring (4) includes an upper fixed section (4-1), a lower fixed section (4-2), and a curved section (4-3). The upper end of the upper fixed section (4-1) is coaxially disposed at the bottom of the needle tip (2). The lower end of the upper fixed section (4-1) is connected to the upper end of the curved section (4-3). The lower end of the lower fixed section (4-2) is coaxially disposed at the top of the needle tail (3). The upper end of the lower fixed section (4-2) is connected to the lower end of the curved section (4-3). The curved section (4-3) is a conical structure that is thin in the middle and thick at both ends. The middle of the conical structure is eccentrically disposed relative to its two ends, so that when the two ends of the curved section (4-3) are subjected to inward pressure, the middle of the curved section (4-3) can bend.

2. A spring probe with an irregularly shaped spring according to claim 1, characterized in that: The upper fixed section (4-1) and the lower fixed section (4-2) have the same diameter and are coaxially arranged, and the outer edge of the curved section (4-3) does not exceed the outer edges of the upper fixed section (4-1) and the lower fixed section (4-2).

3. A spring probe with an irregularly shaped spring according to claim 2, characterized in that: The outer edge of one side of the curved segment (4-3) is a straight line segment, and the straight line segment is aligned with the outer edges of the upper fixed segment (4-1) and the lower fixed segment (4-2). The outer edge of the other side of the curved segment (4-3) is an arc segment.

4. A spring probe with an irregularly shaped spring according to claim 3, characterized in that: The curved section (4-3) has a preset gap (5) between one side of the outer edge of the straight section and the inner wall of the needle tube (1).

5. A spring probe with an irregularly shaped spring according to claim 1, characterized in that: The needle (2) includes a needle body (2-1) and a needle rod (2-2). The needle rod (2-2) is coaxially arranged at the bottom of the needle body (2-1), and the needle rod (2-2) is inserted into the upper fixed section (4-1).

6. A spring probe with an irregularly shaped spring according to claim 1, characterized in that: The needle tail (3) includes: a needle tail body (3-1) and a needle tail rod (3-2). The needle tail rod (3-2) is coaxially arranged on the top of the needle tail body (3-1), and the needle tail rod (3-2) is inserted into the lower fixed section (4-2).

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