Corrosion-resistant test probe

Abstract

The utility model discloses a corrosion-resistant test probe which comprises a needle tube, a needle head is slidably mounted in the needle tube, the needle head and the needle tube can be mounted and dismounted, a connecting spring is mounted in the needle tube, a storage box is fixedly mounted on the outer side of the needle tube, and an anode block is mounted in the storage box and operates by operating the test probe. When the test probe is powered on, current passes through the needle tube, the first wire, the first electrode holder, the anode block, the second electrode holder, the second wire, the contact column and the needle head to form a closed circuit, ions in the anode block are transmitted to the needle tube and the needle head to form an electronic closed loop for anti-corrosion protection of the needle head, the service life of the test probe is prolonged, and the service life of the test probe is prolonged. The probe head is independently replaced, the whole test probe does not need to be replaced, the cost is reduced, meanwhile, the probe head is convenient to mount and dismount, and the probe head is convenient to replace.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB testing, in particular to a corrosion-resistant testing probe. Background Art

[0002] A test probe is a test connection electronic component used to test PCBs in electronic testing. The main body of a conventional test probe is assembled from three parts: a needle, a needle tube, and a spring. When the test probe is in use, the loading plate on which the test probe is installed is controlled to descend, and the loading plate drives the test probe to press down and contact the PCB board for testing. At this time, the probe is energized, and the current starts from the measured point to the needle, then to the tube wall and spring, and finally forms a loop through the lower printed circuit board. After long-term use of the test probe, the needle of the test probe will wear out due to the squeeze contact with the PCB board, and the test can only be carried out by replacing it with a new test probe. The test cost is high. At the same time, when the needle of the test probe is worn, the worn position is prone to corrosion, and the test probe can only be replaced with a new one, and the test cost is also high. Utility Model Content

[0003] The purpose of the present utility model is to provide a corrosion-resistant test probe to solve the problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a corrosion-resistant test probe, comprising a needle tube, a needle head slidably installed inside the needle tube, the needle head and the needle tube can be installed and disassembled, a connecting spring installed inside the needle tube, a storage box fixedly installed on the outside of the needle tube, and an anode block installed inside the storage box.

[0005] As a further preferred embodiment of the present technical solution, a top cover is rotatably installed on the top of the storage box, a first electrode seat is fixedly installed on the inner surface of the top cover, a first wire is installed between the first electrode seat and the needle tube, a second electrode seat is fixedly installed on the bottom of the inner wall of the storage box, a contact column is installed inside the bottom end of the needle tube, the contact column is electrically contacted with the outer wall of the needle, and a second wire is installed between the contact column and the second electrode seat.

[0006] As a further preferred embodiment of the present technical solution, a card block is fixedly mounted on one side of the top cover, and a card slot is provided in the storage box at a position corresponding to the card block, and the card block is engaged with the card slot.

[0007] As a further preferred embodiment of the present technical solution, a receiving hole is symmetrically provided on the top of the needle, a positioning column is slidably installed inside the receiving hole, an extrusion spring is fixedly installed on one end of the positioning column, a circular ring is fixedly installed on the end of the extrusion spring away from the positioning column, a positioning groove is provided on the inner wall of the bottom end of the needle tube corresponding to the position of the positioning column, the positioning groove is slidably connected to the positioning column, and a rounded corner is provided on the end of the positioning column away from the extrusion spring.

[0008] As a further preferred embodiment of the present technical solution, the positioning groove is arranged in the shape of a long groove.

[0009] As a further preferred embodiment of the present technical solution, extrusion rings are fixedly installed at both ends of the connecting spring, and the extrusion rings are slidably installed inside the needle tube.

[0010] As a further preferred embodiment of the present technical solution, a visual window is provided on one side of the storage box, and the visual window is made of transparent plastic material.

[0011] The utility model provides a corrosion-resistant test probe, which has the following beneficial effects:

[0012] (1) The utility model operates by operating the test probe. The test probe will be energized, and the current will form a closed circuit through the needle tube, the first wire, the first electrode holder, the anode block, the second electrode holder, the second wire, the contact column and the needle. The ions in the anode block will be transferred to the needle tube and the needle to form an electronic closed loop, which is used to protect the needle from corrosion and improve the service life of the test probe.

[0013] (2) The utility model controls the needle tube and pulls the needle downward. The rounded corner of the positioning column on the needle tube will squeeze the bottom end of the positioning groove, which will drive the positioning column to be stored in the interior of the storage hole. The needle can be taken out from the interior of the needle tube, and a new needle can be aligned with the bottom of the needle tube. The rounded corner of the positioning column on the needle tube will squeeze the bottom end of the needle tube, which will drive the positioning column to be stored in the interior of the storage hole. At this time, the extrusion spring is in a compressed state. When the positioning column moves to the positioning groove, the extrusion of the positioning column by the extrusion spring will drive the positioning column to be stuck in the interior of the positioning groove for replacement of a new needle. The needle can be replaced separately without replacing the entire test probe, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the overall cross-sectional structure of the utility model;

[0016] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4This is a schematic diagram of the overall cross-sectional explosion structure of the utility model;

[0018] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0019] Figure 6 for Figure 5 Enlarged view of point C in the middle;

[0020] In the figure: 1. needle tube; 2. needle; 3. connecting spring; 4. storage box; 5. anode block; 6. top cover; 7. first electrode seat; 8. first wire; 9. second electrode seat; 10. contact column; 11. second wire; 12. clamping block; 13. clamping slot; 14. storage hole; 15. positioning column; 16. extrusion spring; 17. circular ring; 18. positioning slot; 19. fillet; 20. extrusion ring; 21. visual window. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0022] The utility model provides a technical solution: Figures 1 to 6 As shown, in this embodiment, a corrosion-resistant test probe includes a needle tube 1, a needle head 2 is slidably installed inside the needle tube 1, the needle head 2 and the needle tube 1 can be installed and removed, a connecting spring 3 is installed inside the needle tube 1, a storage box 4 is fixedly installed on the outside of the needle tube 1, and an anode block 5 is installed inside the storage box 4.

[0023] like Figures 1 to 6 As shown, a top cover 6 is rotatably installed on the top of the storage box 4, a first electrode seat 7 is fixedly installed on the inner surface of the top cover 6, a first wire 8 is installed between the first electrode seat 7 and the needle tube 1, a second electrode seat 9 is fixedly installed on the bottom of the inner wall of the storage box 4, a contact column 10 is installed inside the bottom end of the needle tube 1, the contact column 10 is electrically contacted with the outer wall of the needle 2, and a second wire 11 is installed between the contact column 10 and the second electrode seat 9.

[0024] When the test probe is in use, the test probe will be energized, and the current will pass through the needle tube 1, the first wire 8, the first electrode holder 7, the anode block 5, the second electrode holder 9, the second wire 11, the contact column 10 and the needle 2 to form a closed circuit. The ions in the anode block 5 will be transferred to the needle tube 1 and the needle 2 to form an electronic closed loop, which is used to protect the needle 2 from corrosion and improve the service life of the test probe.

[0025] like Figures 1 to 6 As shown, a clamping block 12 is fixedly mounted on one side of the top cover 6 , and a clamping slot 13 is provided at a position of the storage box 4 corresponding to the clamping block 12 , and the clamping block 12 is clamped with the clamping slot 13 .

[0026] After the anode block 5 is placed inside the storage box 4, the top cover 6 is rotated and the anode block 5 can be closed by engaging the clamping block 12 with the clamping slot 13, thereby achieving line connection between the first electrode holder 7 and the anode block 5 and between the anode block 5 and the second electrode holder 9.

[0027] like Figures 1 to 6 As shown, a receiving hole 14 is symmetrically provided on the top of the needle 2, and a positioning column 15 is slidably installed inside the receiving hole 14. An extrusion spring 16 is fixedly installed on one end of the positioning column 15, and a ring 17 is fixedly installed on the end of the extrusion spring 16 away from the positioning column 15. A positioning groove 18 is provided on the inner wall of the bottom end of the needle tube 1 corresponding to the position of the positioning column 15. The positioning groove 18 is slidably connected to the positioning column 15, and a rounded corner 19 is provided on the end of the positioning column 15 away from the extrusion spring 16.

[0028] When the needle 2 is worn out after long-term use, by controlling the needle tube 1 and pulling the needle 2 downward, the rounded corner 19 of the positioning column 15 on the needle 2 will squeeze the bottom end of the positioning groove 18, which will drive the positioning column 15 to be stored in the interior of the receiving hole 14, and the needle 2 can be taken out from the inside of the needle tube 1, and a new needle 2 is aligned with the bottom of the needle tube 1, and the rounded corner 19 of the positioning column 15 on the needle 2 will squeeze the bottom of the needle tube 1, which will drive the positioning column 15 to be stored in the interior of the receiving hole 14. At this time, the extrusion spring 16 is in a compressed state. When the positioning column 15 moves to the positioning groove 18, the extrusion spring 16 squeezes the positioning column 15 to drive the positioning column 15 to be stuck in the interior of the positioning groove 18 for replacing the new needle 2. The needle 2 can be replaced separately without replacing the entire test probe, thereby reducing costs.

[0029] like Figures 1 to 6 As shown, the positioning groove 18 is arranged in the shape of a long groove.

[0030] During the test, the needle 2 presses the PCB board, which drives the needle 2 to slide inside the needle tube 1, ensuring that the positioning column 15 is always inside the positioning groove 18.

[0031] like Figures 1 to 6 As shown, extrusion rings 20 are fixedly installed at both ends of the connecting spring 3, and the extrusion rings 20 are slidably installed inside the needle tube 1.

[0032] When the needle 2 slides inside the needle tube 1, the extrusion ring 20 contacts the top of the needle 2, thereby preventing the connecting spring 3 and the needle 2 from being squeezed and worn.

[0033] like Figures 1 to 6 As shown, a viewing window 21 is provided on one side of the storage box 4 , and the viewing window 21 is made of transparent plastic material.

[0034] The consumption status of the anode block 5 can be observed through the viewing window 21 .

[0035] The utility model provides a corrosion-resistant test probe, the specific working principle of which is as follows:

[0036] When the device is in use, when the test probe is in use, the test probe will be energized, and the current will pass through the needle tube 1, the first wire 8, the first electrode holder 7, the anode block 5, the second electrode holder 9, the second wire 11, the contact column 10 and the needle 2 to form a closed circuit. The ions in the anode block 5 will be transferred to the needle tube 1 and the needle 2 to form an electronic closed loop for corrosion protection of the needle 2. This is the same as the protection principle of the cathode material by the impressed current method.

[0037] When the needle 2 is worn out after long-term use, by controlling the needle tube 1 and pulling the needle 2 downward, the rounded corner 19 of the positioning column 15 on the needle 2 will squeeze the bottom end of the positioning groove 18, which will drive the positioning column 15 to be stored in the interior of the receiving hole 14, and the needle 2 can be taken out from the inside of the needle tube 1, and a new needle 2 is aligned with the bottom of the needle tube 1, and the rounded corner 19 of the positioning column 15 on the needle 2 will squeeze the bottom of the needle tube 1, which will drive the positioning column 15 to be stored in the interior of the receiving hole 14. At this time, the extrusion spring 16 is in a compressed state. When the positioning column 15 moves to the positioning groove 18, the extrusion of the positioning column 15 by the extrusion spring 16 will drive the positioning column 15 to be stuck in the interior of the positioning groove 18 for replacement of the new needle 2.

[0038] Although the 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 variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A corrosion-resistant test probe, characterized by: The invention comprises a needle tube (1), a needle head (2) is slidably mounted inside the needle tube (1), the needle head (2) and the needle tube (1) can be mounted and disassembled, a connecting spring (3) is mounted inside the needle tube (1), a storage box (4) is fixedly mounted on the outside of the needle tube (1), and an anode block (5) is mounted inside the storage box (4).

2. The corrosion-resistant test probe according to claim 1, characterized in that: A top cover (6) is rotatably mounted on the top of the storage box (4), a first electrode seat (7) is fixedly mounted on the inner surface of the top cover (6), a first wire (8) is mounted between the first electrode seat (7) and the needle tube (1), a second electrode seat (9) is fixedly mounted on the bottom of the inner wall of the storage box (4), a contact column (10) is mounted inside the bottom end of the needle tube (1), the contact column (10) is electrically contacted with the outer wall of the needle head (2), and a second wire (11) is mounted between the contact column (10) and the second electrode seat (9).

3. The corrosion-resistant test probe according to claim 2, characterized in that: A card block (12) is fixedly mounted on one side of the top cover (6), and a card slot (13) is provided on the storage box (4) at a position corresponding to the card block (12), and the card block (12) is engaged with the card slot (13).

4. The corrosion-resistant test probe according to claim 2, characterized in that: The top of the needle (2) is symmetrically provided with a receiving hole (14), a positioning column (15) is slidably installed inside the receiving hole (14), one end of the positioning column (15) is fixedly provided with an extrusion spring (16), and the end of the extrusion spring (16) away from the positioning column (15) is fixedly provided with a ring (17), the inner wall of the bottom end of the needle tube (1) is provided with a positioning groove (18) corresponding to the position of the positioning column (15), the positioning groove (18) is slidably connected to the positioning column (15), and the end of the positioning column (15) away from the extrusion spring (16) is provided with a rounded corner (19).

5. The corrosion-resistant test probe according to claim 4, characterized in that: The positioning groove (18) is arranged in the shape of a long groove.

6. The corrosion-resistant test probe according to claim 1, characterized in that: Extrusion rings (20) are fixedly mounted on both ends of the connecting spring (3), and the extrusion rings (20) are slidably mounted inside the needle tube (1).

7. The corrosion-resistant test probe according to claim 3, characterized in that: A viewing window (21) is provided on one side of the storage box (4), and the viewing window (21) is made of transparent plastic material.

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