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CN-224231828-U - Integrated test probe

CN224231828UCN 224231828 UCN224231828 UCN 224231828UCN-224231828-U

Abstract

The utility model provides an integrated test probe, and belongs to the technical field of test probes. The integrated test probe comprises a needle tube and a spring arranged in the needle tube, and is characterized in that a top plug is connected to the inner top end of the needle tube in a threaded manner, the bottom end of the top plug is elastically attached to the top end of the spring, a needle shaft assembly is sleeved in the needle tube, the top end of the needle shaft assembly is elastically attached to the bottom end of the spring, the bottom end of the needle shaft assembly penetrates through the bottom of the needle tube to be inserted into a test needle head, the test needle head is fixedly connected with the bottom end of the needle shaft assembly through a locking component, and the test needle head is designed to be of a detachable structure and is fixedly connected with the bottom end of the needle shaft assembly through the locking component. This design allows the test needle to be replaced individually after wear or damage without replacing the entire probe. The plug is in threaded connection with the needle tube, and the spring can be taken out without damaging the whole structure of the probe by unscrewing the plug, so that the replacement process is greatly simplified.

Inventors

  • Wen Kuohua
  • LU BINGKUN

Assignees

  • 先得利精密测试探针(深圳)有限公司

Dates

Publication Date
20260512
Application Date
20250414

Claims (7)

  1. 1. An integrated test probe comprises a needle tube (1) and a spring (2) arranged inside the needle tube (1), and is characterized in that a plug (3) is connected to the inner top end of the needle tube (1) in a threaded mode, the bottom end of the plug (3) is elastically attached to the top end of the spring (2), a needle shaft assembly (4) is sleeved inside the needle tube (1), the top end of the needle shaft assembly (4) is elastically attached to the bottom end of the spring (2), the bottom end of the needle shaft assembly penetrates through the bottom of the needle tube (1) to be inserted into a test needle head (5), and the test needle head (5) is fixedly connected with the bottom end of the needle shaft assembly (4) through a locking part (6).
  2. 2. The integrated test probe according to claim 1, wherein the side wall of the plug (3) is provided with external threads, the bottom end of the plug is provided with a groove column (31), the inner top end of the needle tube (1) is provided with external threads and is in threaded connection with the outer wall of the plug (3), and the outer wall of the groove column (31) is inserted into the inner top end of the spring (2).
  3. 3. An integrated test probe according to claim 2, wherein the needle shaft assembly (4) comprises a protruding column (41), a shaft rod (42) and a first limiting ring block (43), the top end of the shaft rod (42) is provided with the protruding column (41) and is attached to the bottom end of the spring (2), the outer wall of the protruding column (41) is inserted into the inner bottom end of the spring (2), the side walls of the shaft rod (42) and the first limiting ring block (43) are attached to the inner side wall of the needle tube (1) in a sliding manner, and the first limiting ring block (43) is located in the middle of the shaft rod (42) and is integrally cast.
  4. 4. An integrated test probe according to claim 3, characterized in that the locking member (6) comprises a plugging hole (61), three chuck plates (62), three notches (63) and a tapered locking head (64), the plugging hole (61) is formed at the bottom end of the shaft lever (42), the three chuck plates (62) are divided by the three notches (63), the plugging hole (61) formed inside the three chuck plates (62) is plugged with the test needle (5), the outer wall is attached to the inner side wall of the tapered locking head (64), the bottom of the shaft lever (42) is provided with external threads, and the inner wall of the tapered locking head (64) is provided with internal threads and is in threaded connection with the bottom of the shaft lever (42).
  5. 5. An integrated test probe according to claim 4, characterized in that three of said collet leaves (62) are tapered and match the inner collar of said tapered locking head (64).
  6. 6. The integrated test probe according to claim 5, wherein the outer wall of the needle tube (1) is provided with a concave ring (11), the concave ring (11) is divided into an upper cavity and a lower cavity, the spring (2) is arranged in the upper cavity of the needle tube (1), a shaft lever (42) is arranged in the lower cavity, and the inner ring of the concave ring (11) is attached to the outer wall of the shaft lever (42).
  7. 7. An integrated test probe according to claim 6, characterized in that the needle tube (1), the spring (2), the plug (3), the socket (31), the needle shaft assembly (4), the test needle (5) and the locking member (6) are gold plated.

Description

Integrated test probe Technical Field The application relates to the technical field of test probes, in particular to an integrated test probe. Background In modern electronic manufacturing industry, integrated test probes are key tools essential for circuit board testing, chip testing and other links. The function is to contact the test point of the tested device through the probe head and transmit the test signal, thereby judging whether the function and performance of the tested device reach the standard. With the continuous improvement of the integration level of electronic components and the increasing complexity of test demands, higher requirements are put on the precision, stability and reliability of the test probes. During testing, the probe head needs to make frequent contact and separation with the test point of the device under test. The probe head is extremely prone to high temperatures due to factors such as contact resistance, current load, and possible transient discharge, resulting in burn-out. The burnt probe head not only affects the accuracy of the test, but also may damage the device under test. In addition, the existing probe structure generally fixedly connects the probe head with the probe body, once the probe head is damaged, the probe head is difficult to be singly replaced, and the whole probe is often required to be replaced, so that cost waste and resource consumption are caused. The spring inside the probe is the core component of the probe and is responsible for providing stable contact force and ensuring reliable electrical connection between the probe head and the test point. However, the spring is subjected to repeated compression and extension during long-term use, and fatigue aging is inevitably caused. Aged springs fail to provide stable contact force, resulting in poor contact, unstable signal transmission, and even failure to complete testing. More seriously, existing probe structures often encapsulate the spring inside the probe, and replacement of the spring requires damage to the probe structure, is complex to operate and is prone to damage to the probe, making replacement of the spring extremely difficult. In summary, the existing test probes have obvious defects in the problems that the probe head is easy to damage and difficult to replace, and the spring is easy to age and difficult to replace, and the problems seriously affect the service life of the test probes. Disclosure of utility model In order to overcome the above disadvantages, the present application provides an integrated test probe to solve the problems set forth in the above background art. In order to achieve the above purpose, the technical scheme adopted by the utility model for solving the technical problems is as follows: The integrated test probe comprises a needle tube and a spring arranged in the needle tube, and is characterized in that a top plug is connected to the inner top end of the needle tube in a threaded manner, the bottom end of the top plug is elastically attached to the top end of the spring, a needle shaft assembly is sleeved in the needle tube, the top end of the needle shaft assembly is elastically attached to the bottom end of the spring, the bottom end of the needle shaft assembly penetrates through the bottom of the needle tube to be inserted into a test needle head, and the test needle head is fixedly connected with the bottom end of the needle shaft assembly through a locking part. Further, the external thread is set on the side wall of the plug, the bottom is provided with a groove column, the external thread is set on the top end in the needle tube, and is connected with the external wall of the plug in a threaded manner, and the external wall of the groove column is inserted into the top end in the spring. Further, the needle shaft assembly comprises a protruding column, a shaft rod and a first limiting ring block, the top end of the shaft rod is provided with the protruding column, the shaft rod is attached to the bottom end of the spring, the outer wall of the protruding column is inserted into the bottom end in the spring, the side wall of the shaft rod and the side wall of the first limiting ring block are attached to the inner side wall of the needle tube in a sliding mode, and the first limiting ring block is located in the middle of the shaft rod and is integrally poured. Further, the locking component comprises a plug hole, three chuck sheets, three cuts and a conical lock head, wherein the plug hole is formed in the bottom end of the shaft rod, the three chuck sheets are divided into three by the three cuts, the plug hole formed in the three chuck sheets is plugged with the test needle head, the outer wall of the plug hole is attached to the inner side wall of the conical lock head, the bottom of the side of the shaft rod is provided with external threads, and the inner wall of the conical lock head is provided with internal threads and is in threaded connecti