Electronic probe

Abstract

The utility model discloses an electronic probe, which comprises a needle body with conductivity and a needle cylinder, the needle cylinder is of a sleeve structure, the needle body is of a rod-shaped structure, the needle body is positioned in the needle cylinder, and the needle body and the needle cylinder are integrally formed; the needle body comprises a first contact end, a fixed end and an elastic part located between the first contact end and the fixed end, and the first contact end is used for abutting against a signal part to be detected; the needle cylinder comprises a second contact end and an opening end, and the second contact end is used for being connected with the signal receiving part; the fixed end and the second contact end are kept connected into a whole in an integrated forming mode, and the first contact end extends out of the open end; by means of elastic contraction or expansion of the elastic part in the axial direction of the center of the needle cylinder, the first contact end can do telescopic motion relative to the needle cylinder. According to the electronic probe, the needle body and the needle cylinder adopt the integrated structure, so that the problem that the contact resistance is increased due to oxidation, pollution or fretting wear of a contact interface in a traditional split structure is solved.

Description

Technical Field

[0001] This utility model relates to the field of probe structure technology, and in particular to an electronic probe. Background Technology

[0002] In the field of electronics and electrical equipment, electronic probes, as a key electrical contact element, are widely used in testing, signal transmission, and precision measurement. A typical electronic probe in existing technology usually consists of two parts: a sleeve and a probe body. The fixed end of the probe body is connected to the sleeve by means of snap-fit, welding, or riveting, allowing the first contact end of the probe body to extend and retract within the sleeve.

[0003] However, since the fixed end of the needle body and the sleeve are connected by a mechanical connection structure, there is a physical contact interface between them. During long-term use, the contact interface is prone to increased contact resistance due to metal oxidation, contaminant adhesion, or fretting wear, which in turn affects the transmission efficiency and stability of electronic signals. Moreover, the split structure requires the electronic signal to cross the contact interface between the sleeve and the needle body, and there are impedance abrupt change points in the signal path, causing signal attenuation and noise interference.

[0004] While contact resistance issues can be mitigated through surface coatings (such as gold plating) or increased elastic pressure, these methods offer only limited improvement and increase manufacturing costs and process complexity. Furthermore, the inherent defects of split structures cannot be completely resolved through localized optimization. Utility Model Content

[0005] The purpose of this invention is to provide an electronic probe that can fundamentally eliminate contact impedance and improve signal transmission performance.

[0006] To achieve the above objectives, this utility model provides an electronic probe, characterized in that it includes a needle body and a syringe with conductive properties, the syringe having a sleeve structure, the needle body having a rod-shaped structure, the needle body being located in the syringe, and the needle body and the syringe being integrally formed; the needle body includes a first contact end, a fixed end, and an elastic portion located between the first contact end and the fixed end, the first contact end being used to abut against the signal to be detected;

[0007] The syringe includes a second contact end and an open end, the second contact end being used to connect to a signal receiving unit;

[0008] The fixed end and the second contact end are integrally connected in a molded manner, and the first contact end extends out from the opening end;

[0009] By means of the elastic contraction or expansion of the elastic part along the central axial direction of the syringe, the first contact end can extend or retract relative to the syringe.

[0010] Preferably, the elastic part includes a plurality of helical units, and adjacent helical units are connected by a straight rod.

[0011] Preferably, for any of the spiral units, it comprises two spirally connected spring coils.

[0012] Preferably, the first contact end includes a main body and a head, the diameter of the main body is equivalent to the diameter of the elastic part, and the head has a tapered structure that gradually tapers outward from the main body.

[0013] Preferably, the fixed end includes a transition portion and a connecting portion, the transition portion is connected to the elastic portion, the connecting portion is connected to the second contact end, and the diameter of the transition portion is much smaller than the diameter of the elastic portion.

[0014] Preferably, the syringe is provided with an annular support platform surrounding the axis of the syringe, and the end of the elastic part near the fixed end abuts against the support platform.

[0015] Preferably, the syringe is provided with a plurality of through holes distributed along the central axis of the syringe.

[0016] Preferably, the syringe includes a first section and a second section arranged opposite to each other, each of the first section and the second section having an open end, the second contact end being located between the two oppositely arranged open ends, each of the first section and the second section having a needle body, the first contact end of each needle body extending from the corresponding open end, and the fixed ends of the two needle bodies being integrally connected to the second contact end in a molded manner.

[0017] Compared with the prior art, the electronic probe disclosed in the above technical solution of this utility model has an integral molding structure for the needle body and the syringe barrel, and there is no mechanical contact interface between the two that is connected separately. The signal path is completely continuous from the first contact end of the needle body to the second contact end of the syringe barrel, which avoids the problem of increased contact resistance caused by oxidation, contamination or fretting wear of the contact interface in the traditional separate structure. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an electron probe in one embodiment of the present invention.

[0019] Figure 2 for Figure 1 Longitudinal cross-sectional view.

[0020] Figure 3 This is a three-dimensional structural diagram of the needle body in an embodiment of this utility model.

[0021] Figure 4 for Figure 3 Enlarged view of part A in the middle.

[0022] Figure 5 This is a three-dimensional structural diagram of the electron probe in another embodiment of the present invention. Detailed Implementation

[0023] To explain in detail the technical content, structural features, objectives and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0024] This embodiment discloses an electronic probe that can be used in testing, signal transmission, and precision measurement. Figures 1 to 3 The electron probe includes a conductive needle body 1 and a syringe barrel 2. The syringe barrel 2 has a sleeve structure, and the needle body 1 has a rod-shaped structure. The needle body 1 is located inside the syringe barrel 2, and the needle body 1 and the syringe barrel 2 are integrally formed. In this embodiment, the syringe barrel 2 and the needle body 1 are integrally formed by a stamping process.

[0025] The needle body 1 includes a first contact end 10, a fixed end 11, and an elastic portion 12 located between the first contact end 10 and the fixed end 11. The first contact end 10 is used to abut against the signal part to be detected. For example, the first contact end 10 is used to abut against the contact of the signal output terminal of the device under test.

[0026] The syringe 2 includes a second contact end 20 and an open end 21. The second contact end 20 is used to connect to a signal receiving unit. For example, the second contact end 20 is communicatively connected to a signal processor.

[0027] The fixed end 11 and the second contact end 20 are integrally connected, and the first contact end 10 extends out from the open end 21.

[0028] By means of the elastic contraction or extension of the elastic part 12 along the central axial direction of the syringe 2, the first contact end 10 can move telescopically relative to the syringe 2.

[0029] The working principle of the electron probe in this embodiment is as follows:

[0030] When the first contact end 10 of the needle body 1 comes into contact with the signal section to be tested, the first contact end 10 moves into the syringe 2 under the action of the contact force, and the elastic part 12 elastically contracts. The signal detected by the first contact end 10 flows along the elastic part 12 to the fixed end 11, and then enters the second contact end 20 of the syringe 2 through the fixed end 11, and then transmits the signal to the signal receiving device through the second contact end 20.

[0031] When the first contact end 10 is separated from the signal to be measured, the first contact end 10 is reset under the elastic restoring force of the elastic part 12.

[0032] Therefore, firstly, since the needle body 1 and the syringe 2 adopt an integral molding structure, there is no mechanical contact interface between the two that is connected separately. The signal path is completely continuous from the first contact end 10 of the needle body 1 to the second contact end 20 of the syringe 2, which avoids the problem of increased contact resistance caused by oxidation, contamination or fretting wear of the contact interface in the traditional separate structure, and significantly improves the stability and efficiency of electronic signal transmission.

[0033] Secondly, the integrated connection between the elastic part 12 and the syringe 2 ensures that there is no risk of relative displacement between the fixed end 11 of the needle body 1 and the syringe 2. Under vibration or repeated expansion and contraction conditions, the first contact end 10 can still maintain a stable axial movement trajectory, avoiding signal interruption or probe failure due to loosening of the separate connection.

[0034] Furthermore, by using a stamping process to integrally form the needle body 1 and the syringe 2, the assembly process of traditional split structures (such as snap-fit, welding, or threaded connection) is eliminated, reducing production steps and manual intervention. At the same time, the integrated structure reduces yield losses caused by the accumulation of tolerances of multiple parts, making it suitable for large-scale mass production and effectively reducing overall manufacturing costs.

[0035] On the other hand, such as Figure 3 and Figure 4 The elastic part 12 includes a plurality of spiral units 120, and adjacent spiral units 120 are connected by a straight rod 121.

[0036] Specifically, for any helical unit 120, it includes two helically connected spring coils 122.

[0037] In this embodiment, each helical unit 120 can provide an independent elastic deformation path, so that the stress is evenly distributed inside the helical unit 120, avoiding local stress concentration and significantly reducing the risk of material fatigue fracture. In addition, the use of straight rods 121 to connect adjacent helical units 120 can constrain the radial offset of the helical units 120, ensuring that each helical unit 120 deforms synchronously along the axial direction during compression / extension, improving the uniformity and directional stability of the overall deformation of the elastic part 12.

[0038] Tests have shown that after multiple cycles of expansion and contraction, the cumulative amount of plastic deformation in the segmented spiral structure is only 1 / 3 of that in a traditional single spiral spring, thus extending the probe's service life.

[0039] On the other hand, please refer to again Figures 1 to 3 The first contact end 10 includes a main body 100 and a head 101. The diameter of the main body 100 is equivalent to the diameter of the elastic part 12, and the head 101 has a tapered structure that gradually narrows outward from the main body 100.

[0040] The conical head 101 concentrates contact pressure, ensuring low-impedance electrical contact. In addition, the diameter of the main body 100 is the same as that of the elastic part 12, which enhances the axial support strength of the first contact end 10, prevents the conical head 101 from bending or breaking due to lateral force, and ensures uniform stress transmission between the elastic part 12 and the first contact end 10, reducing local fatigue damage.

[0041] On the other hand, the fixed end 11 includes a transition portion 110 and a connecting portion 111. The transition portion is connected to the elastic portion 12, and the connecting portion 111 is connected to the second contact end 20. The diameter of the transition portion 110 is much smaller than the diameter of the elastic portion 12. It is worth noting that as long as the diameter of the elastic portion 12 is more than three times the diameter of the transition portion 110, it can be considered that the diameter of the transition portion 110 is much smaller than the diameter of the elastic portion 12.

[0042] In this embodiment, the narrow diameter structure of the transition portion 110 allows the elastic portion 12 to produce a small radial offset when it expands and contracts axially, reducing the constraint of the rigid connection on the free deformation of the elastic portion 12, thereby extending the cycle life of the probe.

[0043] Further improvements, such as Figure 2 The syringe 2 is provided with an annular support platform 22 surrounding the axis of the syringe 2, and the end of the elastic part 12 near the fixed end 11 abuts against the support platform 22. By setting the support platform 22, the force of the elastic part 12 is prevented from being transmitted to the fixed end 11 when it moves, thus extending the service life of the probe.

[0044] On the other hand, such as Figure 1 The syringe 2 is provided with several through holes 23 distributed along the central axis of the syringe 2. Based on these through holes 23, the entry and exit of the electroplating solution can be facilitated when the probe is electroplated.

[0045] On the other hand, the probe can also be designed as a dual-headed structure, such as... Figure 5 That is, the syringe 2 includes a first section D1 and a second section D2 arranged opposite to each other. Each of the first section D1 and the second section D2 has an open end 21. The second contact end 20 is located between the two opposite open ends 21. Each of the first section D1 and the second section D2 has a needle body 1. The first contact end 10 of each needle body 1 extends from the corresponding open end 21. The fixed ends 11 of the two needle bodies 1 are connected to the second contact end 20 as a whole.

[0046] In this embodiment, the two first contact ends 10 can respectively detect and contact a signal part to be tested, so as to detect the signal of two parts at the same time. Then, both of the first contact ends 10 output through the second contact end 20 located in the middle.

[0047] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the scope of the present utility model application shall still fall within the scope of the present utility model.

Claims

1. An electronic probe, characterized by, The utility model provides a needle probe, which comprises a needle body and a needle cylinder, the needle cylinder is in sleeve structure, the needle body is in rod structure, the needle body is located in the needle cylinder, and the needle body and the needle cylinder are integrally formed, the needle body comprises a first contact end, a fixed end and an elastic part between the first contact end and the fixed end, the first contact end is used for abutting with a signal detection part, the needle cylinder comprises a second contact end and an open end, the second contact end is used for connecting with a signal receiving part, the fixed end and the second contact end are integrally connected in an integrally formed mode, and the first contact end extends from the open end, the first contact end can be telescopically moved relative to the needle cylinder by virtue of elastic contraction or expansion of the elastic part along the central axial direction of the needle cylinder.

2. The electronic probe of claim 1, wherein, The elastic part comprises a plurality of spiral units, and two adjacent spiral units are connected by a straight rod.

3. The electronic probe of claim 2, wherein, Any spiral unit comprises two spiral connecting elastic rings.

4. The electronic probe of claim 1, wherein, The first contact end comprises a main body part and a head part, the diameter of the main body part is equivalent to the diameter of the elastic part, and the head part is in tapered structure which gradually tapers outwardly from the main body part.

5. The electronic probe of claim 1, wherein, The fixed end comprises a transition part and a connecting part, the transition part is connected with the elastic part, the connecting part is connected with the second contact end, and the diameter of the transition part is much smaller than the diameter of the elastic part.

6. The electronic probe of claim 5, wherein, The needle cylinder is provided with an annular support platform around the central axis of the needle cylinder, and one end of the elastic part close to the fixed end abuts against the support platform.

7. The electronic probe of claim 1, wherein, The needle cylinder is provided with a plurality of through holes distributed along the central axis of the needle cylinder.

8. The electronic probe of claim 1, wherein, The needle cylinder comprises oppositely arranged first and second sections, one open end is arranged in each of the first and second sections, the second contact end is located between the two oppositely arranged open ends, a needle body is arranged in each of the first and second sections, the first contact end of each needle body extends from the corresponding open end, and the fixed ends of the two needle bodies are integrally connected with the second contact end in an integrally formed mode.

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