L-shaped low-leakage signal transmission cable with stable structure

Abstract

The utility model discloses an L-shaped low-leakage signal transmission cable with a stable structure, which comprises a three-coaxial transmission line, a three-coaxial multi-layer shielding joint, a probe arm and a pawl-type probe, one end of the three-coaxial transmission line is connected with the three-coaxial multi-layer shielding joint, and the other end of the three-coaxial transmission line is connected with the pawl-type probe. The other end of the three-coaxial transmission line penetrates through the probe arm and is connected with the pawl type probe, and the probe arm is fixedly connected with the three-coaxial transmission line. According to the L-shaped low-leakage signal transmission cable with the stable structure, the three-coaxial transmission line is fixed on the probe arm, so that the stress of the three-coaxial transmission line can be applied to the probe arm with a more stable structure, and the stress applied to the pawl type probe by the three-coaxial transmission line is reduced, thereby improving the shielding effect, enabling the test and measurement to be accurate, and improving the reliability of the cable. The three coaxial transmission lines are adopted to realize the connection between the current probe and the pawl type probe so as to reduce signal incidence and reflection transmission paths, thereby solving the problem that the rising edge position of the current transient waveform is stepped.

Description

Technical Field

[0001] The utility model relates to the technical field of test probe cables, and particularly relates to an L-shaped low-leakage signal transmission cable with stable structure. Background Technique

[0002] In the research on the test mechanism of integrated circuits, we found that more than half of the failures are caused by electrical stress and static electricity. With the continuous development of integrated circuit technology, the precise measurement achieved by the probe has become a factor affecting test stability due to the existence of coaxial cables. When the current probe and the probe tip are connected in an unstable manner, its shielding effect has a negative impact on the resolution of lower voltage and current measurements, interfering with the stability and accuracy of test results. Therefore, the connection form between the triaxial transmission line and the pawl-type probe, the distance between this connection point and the probe tip, and the advantage of the number of shielding layers have an important impact on the stability and effect of the test. For this reason, in view of the above problems, an L-shaped low-leakage signal transmission cable with stable structure is designed to ensure the accuracy and reliability of test results. Content of the Utility Model

[0003] The purpose of the utility model is to provide an L-shaped low-leakage signal transmission cable with stable structure to solve the problems put forward in the above background technique.

[0004] To achieve the above purpose, the utility model provides the following technical solution: an L-shaped low-leakage signal transmission cable with stable structure, including a triaxial transmission line, a triaxial multi-layer shielding joint, a probe arm, and a pawl-type probe. One end of the triaxial transmission line is connected to the triaxial multi-layer shielding joint, and the other end of the triaxial transmission line is connected to the pawl-type probe through the probe arm. The connection between the probe arm and the triaxial transmission line is a fixed connection. The probe arm is connected to a fixed seat, and a clamping plate is rotatably connected to the fixed seat.

[0005] Preferably, an ear plate is further fixed on the probe arm, and the ear plate can play a limiting role when contacting the fixed seat and the clamping plate. The probe arm is in a right-angled structure. Through the limiting effect of the ear plate contacting the fixed seat and the clamping plate, the installation angle of the probe arm can be guaranteed, thereby effectively avoiding the rotation of the probe arm.

[0006] Preferably, a probe is fixed on the pawl-type probe through a bolt, and the probe extends outward along the central axis of the pawl-type probe. The probe fixed on the pawl-type probe can provide a basic guarantee for subsequent detection.

[0007] Preferably, an arc-shaped groove is opened on the fixed seat, and the arc-shaped groove is nested with the probe arm. A threaded hole is also opened on the fixed seat. Through the nesting effect between the arc-shaped groove and the probe arm, the positioning of the probe arm can be realized.

[0008] Preferably, an arc-shaped structure protective pad is also fixed on the clamping plate, and the protective pad contacts the probe arm. Through the action of the protective pad, when the probe arm is clamped and fixed, the probe arm can be protected to avoid deformation and damage of the probe arm.

[0009] Preferably, the clamping plate and the fixed seat are locked by a locking bolt, and the locking bolt is in threaded connection with the threaded hole. Through the action of the locking bolt, the stability of the connection between the clamping plate and the fixed seat can be ensured.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: for the L-shaped low-leakage signal transmission cable with stable structure: by fixing the triaxial transmission line to the probe arm, the stress of the triaxial transmission line can be applied to the more stable probe arm, reducing the stress applied by the triaxial transmission line to the pawl-type probe, thereby increasing the shielding effect and making the test measurement accurate. The triaxial transmission line is used to connect the current probe and the pawl-type probe to reduce the signal incident and reflection transmission paths, thereby solving the problem of the stepped shape at the rising edge position of the current transient waveform. In summary, in this technical solution, the shielding ability is increased by using the triaxial transmission line, making the rising edge of the transient current waveform smooth. The triaxial transmission line is fixed to the probe arm to reduce the stress applied by the transmission line to the probe, making the falling needle stable without floating, and providing a probe structure that can reduce the transmission line length and has a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is a three-dimensional structural schematic diagram of the overall composition of the device of the present utility model;

[0012] Figure 2 is a three-dimensional exploded structural schematic diagram of the probe arm and the fixed seat of the present utility model;

[0013] Figure 3 is a three-dimensional exploded structural schematic diagram of the fixed seat and the clamping plate of the present utility model.

[0014] In the figure: 1, triaxial transmission line; 2, triaxial multi-layer shielding joint; 3, probe arm; 301, ear plate; 4, pawl-type probe; 5, fixed seat; 501, arc-shaped groove; 502, threaded hole; 6, clamping plate; 601, protective pad; 7, locking bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0016] Please refer to Figures 1 - 3 . The present utility model provides a technical solution: a structurally stable L-shaped low-leakage signal transmission cable, including a triaxial transmission line 1, a triaxial multi-layer shielding joint 2, a probe arm 3, and a pawl-type probe 4. One end of the triaxial transmission line 1 is connected to the triaxial multi-layer shielding joint 2, and the other end of the triaxial transmission line 1 is connected to the pawl-type probe 4 through the probe arm 3. The probe arm 3 is fixedly connected to the triaxial transmission line 1, and the probe arm 3 is connected to a fixed seat 5. A clamping plate 6 is rotatably connected to the fixed seat 5.

[0017] An ear plate 301 is also fixed on the probe arm 3, and the contact between the ear plate 301 and the fixed seat 5 and the clamping plate 6 can achieve a limiting effect. The probe arm 3 is of a right-angled structure; an arc-shaped groove 501 is formed on the fixed seat 5, and the arc-shaped groove 501 is nested with the probe arm 3. A threaded hole 502 is also formed on the fixed seat 5; an arc-shaped structure protective pad 601 is fixed on the clamping plate 6, and the protective pad 601 contacts the probe arm 3; the clamping plate 6 and the fixed seat 5 are locked by a locking bolt 7, and the locking bolt 7 is in threaded connection with the threaded hole 502;

[0018] When using this structurally stable L-shaped low-leakage signal transmission cable, as Figures 1 - 3 shown, first assemble the entire device. The positioning of the probe arm 3 can be achieved by nesting the probe arm 3 with the arc-shaped groove 501. At this time, the ear plate 301 fits with the fixed seat 5, and the holes on the ear plate 301 cooperate with the threaded hole 502. By rotating the clamping plate 6, the clamping effect on the probe arm 3 can be achieved, and when the rotating clamping plate 6 contacts the ear plate 301, at this time, through the limiting effect of the rotating clamping plate 6 and the fixed seat 5 on the ear plate 301, the installation position of the probe arm 3 can be ensured, avoiding the rotation of the probe arm 3. Finally, the locking bolt 7 passes through the clamping plate 6 and the ear plate 301 and is connected to the threaded hole 502 to achieve the clamping and fixing effect of the probe arm 3, and with the cooperation of the protective pad 601, it can avoid the deformation and damage of the probe arm 3 when the probe arm 3 is clamped and fixed;

[0019] A probe is fixed on the pawl-type probe 4 by a bolt, and the probe extends outward along the central axis of the pawl-type probe 4;

[0020] After the device is assembled, as Figures 1 - 3As shown, the installation of the device can be achieved by fixing the fixed seat 5 to the driving structure. During detection, the detection function can be realized by the probe mounted on the ratchet-type probe 4 coming into contact with the device under test. Moreover, the probe on the ratchet-type probe 4 is fixedly connected by screw clamping and is clamped at a fixed angle to reduce the signal incident and reflection transmission paths, thereby solving the problem of the stepped shape at the rising edge of the current transient waveform. Then, the triple coaxial transmission line 1 is directly used to improve the shielding performance, making the rising of the transient current waveform smooth, thus solving the problems of insufficient test stability and effect existing in the existing probe structure during the test process. This is the working principle of the stable L-shaped low-leakage signal transmission cable with this structure.

[0021] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An L-shaped low leakage signal transmission cable with a stable structure, comprising a triaxial transmission line (1), a triaxial multi-layer shielding connector (2), a probe arm (3) and a ratchet probe (4), characterized in that: One end of the triaxial transmission line (1) is interconnected with a triaxial multilayer shielding connector (2), and the other end of the triaxial transmission line (1) is interconnected with a penetrating probe arm (3) and a ratchet probe (4); the probe arm (3) and the triaxial transmission line (1) are fixedly connected, and the probe arm (3) and a fixing seat (5) are interconnected, and a clamping plate (6) is rotatably connected to the fixing seat (5).

2. The L-shaped low leakage signal transmission cable with a stable structure according to claim 1, characterized in that: An ear plate (301) is also fixed on the probe arm (3), and the ear plate (301) contacts the fixing seat (5) and the clamping plate (6) to achieve a limiting effect. The probe arm (3) is a right-angle structure.

3. The L-shaped low leakage signal transmission cable with a stable structure according to claim 1, characterized in that: A probe is fixed to the ratchet-type probe (4) by means of bolts, and the probe extends outwards along the central axis of the ratchet-type probe (4).

4. The L-shaped low leakage signal transmission cable with a stable structure according to claim 1, characterized in that: The fixing seat (5) is provided with an arc-shaped groove (501), and the arc-shaped groove (501) and the probe arm (3) are nested and connected, and the fixing seat (5) is also provided with a threaded hole (502).

5. The L-shaped low leakage signal transmission cable with a stable structure according to claim 1, characterized in that: An arc-shaped protective pad (601) is also fixed on the clamping plate (6), and the protective pad (601) is in contact with the probe arm (3).

6. The L-shaped low leakage signal transmission cable with a stable structure according to claim 4, characterized in that: The clamping plate (6) and the fixing seat (5) are locked by means of a locking bolt (7), and the locking bolt (7) and the threaded hole (502) are threadedly connected.

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