Terminal defect detection device

Abstract

The invention discloses a terminal defect detection device, and belongs to the technical field of terminal performance detection devices.The terminal defect detection device comprises a plurality of probes and a connector, the connector is located at one ends of the probes, the probes are sequentially and parallelly tested in a terminal or on the top face of the terminal, and the side face of each probe is wrapped with a probe sleeve; a plurality of probes are arranged in the connector, each probe is fixedly provided with a step, a plurality of terminals are arranged in the connector, the number of the terminals is equal to that of the probes, one end of each terminal is of a hollow groove structure, and a tongue piece is arranged in the hollow groove of each terminal. The position of each step can be scanned through the camera, the 3D line laser scanner on the movable guide rail is used for scanning, point cloud is analyzed to calculate the distance between the step of each probe and the connector, whether a terminal retreats or a terminal tongue piece collapses or not is judged, and then the situation that defective products are loaded on a vehicle is effectively prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of terminal performance detection devices, and more specifically, to a terminal defect detection device. Background Art

[0002] A step pin for detecting terminals is a precision tool used in the fields of electronic manufacturing and testing, mainly for detecting connector terminals, solder joint quality, and electrical continuity on a printed circuit board (PCB).

[0003] In the prior art, a step pin is used to detect the retraction of the terminal and the collapse of the terminal tongue. Since the step of the probe is limited by the bottom of the connector and cannot extend further into the terminal, the probe cannot contact the tongue of the terminal, resulting in a non-connected state between the terminal and the probe. According to the non-connected connection result, the retraction of the terminal and the collapse of the terminal tongue are detected.

[0004] Currently, since the terminal has a certain free clearance inside the connector and the probe cannot completely and accurately avoid touching the inner side wall of the terminal, even if the terminal retracts or the terminal tongue collapses during the test, a circuit will be formed between the terminal and the probe, resulting in the inability to detect defects. At the same time, when monitoring terminal defects, the retraction distance of the terminal and the opening degree of the terminal cannot be accurately detected, and small-distance retractions or slight collapses of the terminal tongue cannot be detected.

[0005] Therefore, in view of this, the existing structure is studied and improved to provide a terminal defect detection device, with the expectation of achieving a more practical value. Summary of the Invention

[0006] 1. Technical Problems to be Solved

[0007] Aiming at the problems existing in the prior art, the purpose of the present invention is to provide a terminal defect detection device, which can take pictures of the positions of each step through a camera, scan through a 3D line laser scanner on a moving guide rail, analyze the point cloud to calculate the distance of each probe step relative to the connector, determine whether the terminal retracts or the terminal tongue collapses, and thus effectively prevent defective products from being loaded onto vehicles.

[0008] 2. Technical Solutions

[0009] To solve the above problems, the present invention adopts the following technical solutions.

[0010] A terminal defect detection device includes a defect monitoring structure for detecting internal terminal defects of a connector. The defect monitoring structure includes a plurality of probes. The plurality of probes are sequentially and parallelly tested inside or on the top surface of the terminal. A needle sleeve is wrapped around the side of each probe. A spring is installed below the probe axially and abuts against the bottom of the needle sleeve. A step is fixedly arranged on each probe. The number of terminals provided is equal to the number of probes provided. One end of the terminal is a hollow groove structure, and a tongue piece is arranged inside the hollow groove of the terminal.

[0011] A linear guide rail and a defect detection device are arranged on the sides of the probe and the connector. The defect detection device moves along the linear guide rail. The defect detection device is any one of a high-resolution camera and a 3D line laser mobile scanner.

[0012] Further, the defect detection device uses a high-resolution camera. The shooting direction of the camera of the high-resolution camera is perpendicular to the extension direction of the probe.

[0013] Further, the connector is a multi-layer structure, and the steps at each probe are staggered from each other.

[0014] Further, the defect detection device uses a 3D line laser mobile scanner. The 3D line laser mobile scanner moves along the horizontal and vertical directions of the probe and sequentially scans a plurality of steps.

[0015] Further, a 3D dot matrix diagram is formed after the 3D line laser mobile scanner scans.

[0016] Further, the step is arranged at the proximal end of the probe close to the terminal.

[0017] Further, the step is arranged at the end of the probe far from the terminal.

[0018] 3. Beneficial effects

[0019] Compared with the prior art, the advantages of the present invention are as follows:

[0020] By detecting the position change of the probe step through the detection method of a high-resolution camera or a 3D line laser mobile scanner, the accurate detection and determination of the retraction distance of the terminal or the collapse of the terminal tongue piece are realized, effectively preventing the situation of defective products being loaded onto the vehicle. Description of the drawings

[0021] Figure 1 It is a schematic structural diagram when the probe and the terminal are separated in the present invention;

[0022] Figure 2 It is a schematic process diagram when the probe approaches the terminal in the present invention;

[0023] Figure 3Schematic diagram of the step at the end of the probe away from the terminal in the present invention;

[0024] Figure 4 Schematic diagram of the structure of the defect detection device in the present invention when a high-resolution camera is selected;

[0025] Figure 5 Schematic diagram of the structure of the defect detection device in the present invention when 3D line laser mobile scanning is selected;

[0026] Figure 6 Schematic diagram of the structure of the probe in the present invention in contact with the top of the terminal.

[0027] Explanation of the reference numerals in the figure:

[0028] 1. Probe;

[0029] 2. Connector;

[0030] 3. Needle sleeve;

[0031] 4. Step;

[0032] 5. Terminal;

[0033] 6. Tongue piece;

[0034] 7. Linear guide;

[0035] 8. Defect detection device. Specific implementation manner

[0036] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention; obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0037] Embodiment 1:

[0038] Please refer to Figure 1 - Figure 6 , a terminal defect detection device, including a defect monitoring structure for detecting defects in the internal terminals 5 of the connector 2. The defect monitoring structure includes a plurality of probes 1, and the plurality of probes 1 are sequentially and parallelly tested inside or on the top surface of the terminal. The side of each probe 1 is wrapped with a needle sleeve 3, a spring is installed below the axis of the probe and abuts against the bottom of the needle sleeve, and a step 4 is fixedly arranged on each probe 1. The number of terminals 5 provided is equal to the number of probes 1 provided. One end of the terminal 5 is a hollow groove structure, and a tongue piece 6 is arranged inside the hollow groove of the terminal 5;

[0039] On the sides of the probe 1 and the connector 2, there are linear guides 7 and a defective detection device 8. The defective detection device 8 moves along the linear guide 7. The defective detection device 8 can be any one of a high-resolution camera and a 3D line laser mobile scanner.

[0040] Principle of operation:

[0041] When performing defective detection on the terminal 5, taking four terminals 5 as an example, which are respectively marked as A, B, C, and D. In the traditional detection method, when the terminal tongue of the terminal 5 collapses or the terminal 5 moves backward, the step 4 of the probe 1 is restricted by the bottom of the connector 2 and cannot continue to extend into the terminal 5, so that the probe 1 cannot contact the elastic piece 6 of the terminal 5, resulting in a non-connected state between the terminal 5 and the probe 1, thereby detecting the backward movement of the terminal 5 and the collapse of the terminal tongue of the terminal 5.

[0042] Based on the traditional detection device, a defective detection device 8 is added. Using a high-resolution camera or a 3D line laser mobile scanner, the position change distance of the step of the probe 1 is accurately detected. Due to the backward movement of the terminal or the collapse of the terminal tongue, the probe 1 will move towards the inside of the connector under the action of the internal spring, thus generating a position difference from the probe step of the correctly tested terminal. Based on this position difference, the movement distance of the terminal 5 or the collapse situation of the tongue can be accurately determined, ensuring the accuracy of the defective detection of the terminal 5.

[0043] Embodiment 2:

[0044] Based on the above Embodiment 1, a further description is made.

[0045] Refer to Figure 1 、 Figure 2 、 Figure 4 Specifically, the defective detection device 8 uses a high-resolution camera, and the shooting direction of the camera of the high-resolution camera is perpendicular to the extension direction of the probe 1.

[0046] When there is only one connector 2, the position of the resolution camera is fixed and the linear guide 7 does not need to be set.

[0047] Refer to Figure 4 Specifically, when multiple connectors 2 are set, the connector 2 is a multi-layer structure, and the steps 4 at each probe 1 are staggered from each other.

[0048] The probe 1 is installed in the needle sleeve 3, and a spring is provided inside the needle sleeve 3. The probe 1 elastically moves up and down in the needle sleeve 3 and moves up and down following the terminal 5.

[0049] For the multi-layer connector 2, the steps 4 of each layer of the probe 1 are offset to a certain extent so that the steps 4 of each layer of the probe 1 can be seen when taking pictures or scanning from above.

[0050] Refer to Figure 1 、Figure 2 , Figure 5 , specifically, the defective detection device 8 uses a 3D line laser mobile scanner. The 3D line laser mobile scanner moves along the vertical direction of the probe 1 and sequentially scans a plurality of steps 4.

[0051] Specifically, a 3D dot matrix diagram is formed after the 3D line laser mobile scanner scans.

[0052] Using the 3D dot matrix diagram, the position analysis of the steps of the probe 1 is carried out, and the moving distance of the probe 1 can be accurately determined. Furthermore, the moving distance of the terminal 5 can be accurately judged to ensure the accuracy of the defective detection of the terminal 5.

[0053] Refer to Figure 1 , Figure 2 , specifically, the step 4 is arranged at the proximal end of the probe 1 close to the terminal 5.

[0054] Based on the traditional detection device, the defective detection device 8 is added. By using a high-resolution camera or a 3D line laser mobile scanner, the moving distance of the step 4 of the probe 1 relative to the direction in which the terminal 5 is inserted into the connector 2 is accurately detected. Furthermore, the moving distance of the terminal 5 or the collapse of the internal tongue piece of the terminal 5 is accurately judged to ensure the accuracy of the defective detection of the terminal 5.

[0055] Refer to Figure 1 , Figure 3 , specifically, the step 4 is arranged at the end of the probe 1 far from the terminal 5.

[0056] To avoid restricting the insertion distance of the probe 1 into the terminal 5 due to the step 4, the defective detection when the backward distance of the terminal 5 is large can be carried out.

[0057] Embodiment 3:

[0058] Based on the above-mentioned Embodiment 1 and Embodiment 2, a further description is made.

[0059] Refer to Figure 1 , based on the probe 1 and the terminal 5, in any case, the probe 1 needs to be fixed in the test module, and an observation hole is opened to expose the step 4 part for taking pictures.

[0060] The above is only a preferred specific embodiment of the present invention; however, the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A terminal defect detection device, comprising a defect monitoring structure for detecting a defect of an internal terminal (5) of a connector (2), characterized in that: The defect monitoring structure comprises a plurality of probes (1), wherein the plurality of probes (1) are sequentially tested in parallel inside or on the top surface of the terminal, the side surface of each of the probes (1) is wrapped with a needle sleeve (3), a spring is provided axially below the probe to abut against the bottom of the needle sleeve, and a step (4) is fixedly provided on each of the probes (1), the number of terminals (5) being equal to the number of probes (1), one end of the terminal (5) being a hollow slot structure, and a tongue piece (6) is provided inside the hollow slot of the terminal (5); A linear guide rail (7) and a defect detection device (8) are provided on the side of the probe (1) and the connector (2); the defect detection device (8) moves along the linear guide rail (7); and the defect detection device (8) is any one of a high-resolution camera and a 3D line laser mobile scanner.

2. A terminal defect detection device according to claim 1, characterized in that: The defect detection device (8) uses a high-resolution camera, and the shooting direction of the camera head of the high-resolution camera is perpendicular to the extension direction of the probe (1).

3. A terminal defect detection device according to claim 1, characterized in that: The connector (2) is a multi-layer structure, and the steps (4) at each probe (1) are staggered.

4. A terminal defect detection device according to claim 1, characterized in that: The defect detection device (8) uses a 3D line laser mobile scanner, which moves along the horizontal and vertical directions of the probe (1) and scans a plurality of steps (4) in sequence.

5. A terminal defect detection device according to claim 1, characterized in that: The 3D line laser mobile scanner forms a 3D dot pattern after scanning.

6. A terminal defect detection device according to claim 1, characterized in that: The step (4) is arranged at a proximal end of the probe (1) close to the terminal (5).

7. A terminal defect detection device according to claim 1, characterized in that: The step (4) is arranged at the end of the probe (1) away from the terminal (5).

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