Obstacle avoidance detection mechanism for PCB flying probe testing

Abstract

The utility model relates to flying probe tester technical field, concretely relates to a kind of barrier detection mechanism for PCB flying probe test, including detection frame and flexible hose, the threaded rod is equipped in detection frame, the outer thread of threaded rod is connected with guide block, the front surface of guide block is fixedly connected with limit frame, the guide rail plate is equipped in limit frame, the detection head is equipped in the below of guide rail plate, the above of guide rail plate is connected with obstacle sensor, the above of guide rail plate is equipped with protective cover. By setting protective cover, transparent plate, clamping structure and slot, the barrier detection mechanism is matched between thumb push plate, spring and slot, so that protective cover and guide rail plate can realize the function of quick assembly, facilitate to play certain protective effect to obstacle sensor, avoid dust and its small glass fiber chip to adhere on the surface of obstacle sensor, guarantee its emission light intensity and receiving sensitivity, improve the operating performance of obstacle sensor.

Description

Technical Field

[0001] This utility model relates to the field of flying probe testing machine technology, specifically to an obstacle avoidance detection mechanism for PCB flying probe testing. Background Technology

[0002] A PCB flying probe tester is a high-precision device that uses precision probes to replace traditional test fixtures for electrical performance testing of printed circuit boards. Its core components include multiple flying probe test units that can move at high speed in the X, Y, and Z axes. Each unit is equipped with a precision probe at its end. In order to cope with the high-density component layout on the PCB and prevent the probe from colliding with tall components on the board during the test, a reliable and efficient obstacle avoidance detection mechanism is essential. This mechanism is usually integrated into the flying probe test head and is a key subsystem to ensure equipment safety, test accuracy, and operating efficiency.

[0003] Chinese utility model patent with authorization announcement number "CN 221039316 U" specifically describes "an obstacle avoidance detection structure for a flying probe testing machine." It includes a testing platform, on the surface of which a leverless cylinder is mounted. A fixed sliding column is mounted on the leverless cylinder, and a support plate is fixedly connected to the surface of the fixed sliding column via a drive slider. A first drive cylinder is mounted on the support plate, and its output end is fixedly connected to a mounting frame via a telescopic guide rod. A second drive cylinder is mounted on the front surface of the mounting frame, and its output end is fixedly connected to a mounting base via a push rod assembly. A flying probe testing head is mounted on the front surface of the mounting base, and an obstacle sensor and a testing interface are mounted on the flying probe testing head. This utility model, by installing an obstacle sensing module on the flying probe testing head, allows the obstacle sensor to detect an obstacle and feed back a relevant signal to a moving adjustment drive device, prompting it to make corresponding drive adjustments, enabling the flying probe testing head to quickly avoid the obstacle.

[0004] The surface of the obstacle sensor in the above-mentioned device is mostly without a protective structure. Dust and fine glass fiber shavings can easily adhere to the optical window of the sensor, forming a shielding film, which severely attenuates the intensity of emitted light and the sensitivity of received light, and reduces the detection distance of the sensor. Utility Model Content

[0005] In view of the above-mentioned shortcomings of the existing technology, this utility model provides an obstacle avoidance detection mechanism for PCB flying probe testing, which can effectively solve the problems mentioned in the background technology.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model provides an obstacle avoidance detection mechanism for PCB flying probe testing, including a detection frame and a telescopic hose. The detection frame has a threaded rod internally, with a guide block externally threaded onto the rod. A limit frame is fixedly connected to the front of the guide block, and a guide rail plate is internally located within the limit frame. A detection head is located below the guide rail plate, and an obstacle sensor is connected above the guide rail plate. A protective cover is located above the guide rail plate, with a slot fixedly connected to the side of the protective cover. A snap-fit ​​structure is located above the guide rail plate, snapping into the slot. A transparent plate is fixedly connected above the protective cover, and a cleaning structure is located above the protective cover, connected to the telescopic hose. The snap-fit ​​structure includes an auxiliary frame and a thumb push plate. A locking block is fixedly connected to the left side of the thumb push plate, and a spring is located on the right side of the thumb push plate. A limit plate is fixedly connected internally within the auxiliary frame.

[0008] Furthermore, the auxiliary frame is fixedly connected above the guide rail plate, the locking block is engaged in the locking groove, the thumb push plate is slidably connected in the auxiliary frame, the limiting plate overlaps with the left side of the thumb push plate, and the thumb push plate is connected in the auxiliary frame by a spring.

[0009] Furthermore, a driver is provided above the testing frame, the output shaft of the driver is connected to a threaded rod, and the telescopic hose is located on the front of the testing frame.

[0010] Furthermore, two columns are fixedly connected above the guide rail plate, the columns are snapped into the protective cover, and the obstacle sensor is located inside the protective cover.

[0011] Furthermore, the cleaning structure includes a miniature jet nozzle plate and an adapter. The miniature jet nozzle plate is fixedly connected to the top of the protective cover, and a thin tube is fixedly connected to the back of the miniature jet nozzle plate.

[0012] Furthermore, the adapter is fixedly connected to one end of the telescopic hose, and a sealing head is connected to one end of the thin tube, the sealing head being threadedly connected to the adapter.

[0013] The technical solution provided by this utility model has the following advantages compared with the known prior art:

[0014] 1. By setting up a protective cover, a transparent plate, a snap-fit ​​structure, and a slot, the thumb pusher is pulled by the finger. When the thumb pusher slides within the auxiliary frame, it causes the spring to deform, and then the protective cover snaps onto the top of the guide rail plate. The protective cover interlocks with the column. When the protective cover and the guide rail plate are fully in contact, the thumb pusher is released. When the thumb pusher loses resistance, it resets via the spring. After resetting, the snap-fit ​​block snaps into the slot. This obstacle avoidance detection mechanism, through the cooperation between the thumb pusher, the spring, and the slot, enables the protective cover and the guide rail plate to be quickly assembled. This provides a certain degree of protection for the obstacle sensor, preventing dust and fine glass fiber shavings from adhering to the surface of the obstacle sensor, ensuring its emitted light intensity and received sensitivity, and improving the operational performance of the obstacle sensor.

[0015] 2. By setting up a cleaning structure and a telescopic hose, the sealing head at one end of the thin tube is connected to the adapter at one end of the telescopic hose, and the other end of the telescopic hose is connected to a small solenoid valve and air source inside the equipment. During each test, the solenoid valve will be opened instantaneously by the program to spray out high-pressure airflow, which can regularly clean the dust on the surface of the transparent plate. It has a certain degree of automation and does not require human intervention. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a three-dimensional structural diagram of the limiting frame of this utility model;

[0019] Figure 3 This is a three-dimensional structural diagram of the guide rail plate of this utility model;

[0020] Figure 4 This is a schematic diagram of the cross-sectional structure of the snap-fit ​​structure of this utility model;

[0021] Figure 5 This utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0022] The labels in the diagram represent:

[0023] 1. Inspection frame; 2. Threaded rod; 3. Guide block; 4. Limiting frame; 5. Guide rail plate; 6. Inspection head; 7. Snap-fit ​​structure; 701. Auxiliary frame; 702. Thumb push plate; 703. Locking block; 704. Limiting plate; 705. Spring; 8. Cleaning structure; 801. Miniature air nozzle plate; 802. Thin tube; 803. Adapter; 804. Sealing head; 9. Obstacle sensor; 10. Protective cover; 11. Telescopic hose; 12. Driver; 13. Column; 14. Transparent plate; 15. Slot. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0025] The present invention will be further described below with reference to the embodiments.

[0026] Example 1:

[0027] Reference Figure 1-5 This first embodiment of the present invention discloses an obstacle avoidance detection mechanism for PCB flying probe testing, including a detection frame 1 and a telescopic hose 11. A threaded rod 2 is provided inside the detection frame 1, and a guide block 3 is externally threaded onto the threaded rod 2. A limit frame 4 is fixedly connected to the front of the guide block 3. A guide rail plate 5 is provided inside the limit frame 4. A detection head 6 is located below the guide rail plate 5. An obstacle sensor 9 is connected above the guide rail plate 5. A protective cover 10 is located above the guide rail plate 5, and the side of the protective cover 10 is fixedly connected to... There is a slot 15, and a snap-fit ​​structure 7 is provided above the guide rail plate 5. The snap-fit ​​structure 7 snaps into the slot 15. A transparent plate 14 is fixedly connected above the protective cover 10. A cleaning structure 8 is provided above the protective cover 10. The cleaning structure 8 is connected to the telescopic hose 11. The snap-fit ​​structure 7 includes an auxiliary frame 701 and a thumb push plate 702. A locking block 703 is fixedly connected to the left side of the thumb push plate 702. A spring 705 is provided to the right side of the thumb push plate 702. A limit plate 704 is fixedly connected inside the auxiliary frame 701.

[0028] The auxiliary frame 701 is fixedly connected above the guide rail plate 5. The locking block 703 is locked in the slot 15. The thumb push plate 702 is slidably connected in the auxiliary frame 701. The limiting plate 704 overlaps with the left side of the thumb push plate 702. The thumb push plate 702 is connected in the auxiliary frame 701 by the spring 705. The driver 12 is provided above the detection frame 1. The output shaft of the driver 12 is connected to the threaded rod 2. The telescopic hose 11 is located on the front of the detection frame 1.

[0029] By setting the snap-fit ​​structure 7, when installing the protective cover 10, the operator only needs to pull the thumb push plate 702 outward with their finger. The thumb push plate 702 slides in the auxiliary frame 701 and compresses the spring 705, causing the locking block 703 to disengage from the constraint range of the slot 15. After the protective cover 10 is fully attached to the guide rail plate 5, the thumb push plate 702 is released, the spring 705 returns to its original state, and pushes the thumb push plate 702 and the locking block 703 inward, so that the locking block 703 accurately engages in the slot 15 on the side of the protective cover 10, thereby completing the fixation. This allows the protective cover 10 and the guide rail plate 5 to achieve the function of quick assembly, and facilitates the subsequent individual replacement or maintenance of the protective cover 10.

[0030] Example 2:

[0031] Reference Figure 3-5 This is the second embodiment of the present invention, which differs from the first embodiment in that:

[0032] Two columns 13 are fixedly connected to the top of the guide rail plate 5. The columns 13 are snapped into the protective cover 10. The obstacle sensor 9 is located inside the protective cover 10. The cleaning structure 8 includes a miniature jet nozzle plate 801 and an adapter 803. The miniature jet nozzle plate 801 is fixedly connected to the top of the protective cover 10. A thin tube 802 is fixedly connected to the back of the miniature jet nozzle plate 801. The adapter 803 is fixedly connected to one end of the telescopic hose 11. One end of the thin tube 802 is connected to a sealing head 804. The sealing head 804 is threadedly connected to the adapter 803. The other end of the telescopic hose 11 is used to connect to the pneumatic control system inherent inside the test machine body. The pneumatic control system usually includes an air source that provides compressed air and a small solenoid valve that is controlled by the main controller. Since the pneumatic control system is existing technology, it is not described in detail.

[0033] By setting up the cleaning structure 8 and the telescopic hose 11, an automated cleaning function for the surface of the transparent plate 14 is realized. The miniature air nozzle plate 801 in the cleaning structure 8 is arranged above the protective cover 10. It is connected to the telescopic hose 11 through the thin tube 802. The other end of the telescopic hose 11 is connected to a small solenoid valve and air source inside the equipment. During the test, the solenoid valve can be opened at regular intervals or instantaneously as needed by the program to release high-pressure airflow. The airflow passes through the telescopic hose 11, the adapter 803, and the thin tube 802 and is finally sprayed out from the miniature air nozzle plate 801, directly acting on the surface of the transparent plate 14, effectively blowing away accumulated dust, glass fiber debris and other pollutants. This not only avoids manual intervention, but also effectively ensures that the optical window of the obstacle sensor 9 is always in a clean state, ensuring that its detection distance and sensitivity are not affected, and further enhancing the reliability and service life of the obstacle avoidance detection mechanism.

[0034] The remaining structure is the same as that in Example 1.

[0035] The workflow of this utility model is as follows:

[0036] When the obstacle avoidance detection mechanism is in operation, the thumb push plate 702 can be pulled by the finger. When the thumb push plate 702 slides in the auxiliary frame 701, it will cause the spring 705 to deform and then the protective cover 10 will be snapped on the top of the guide rail plate 5. The protective cover 10 will be inserted into the column 13. When the protective cover 10 is completely in contact with the guide rail plate 5, the thumb push plate 702 will be released. When the thumb push plate 702 loses resistance, it will be reset by the spring 705. After the reset, the locking block 703 will be snapped into the locking slot 15.

[0037] Then, the sealing head 804 at one end of the thin tube 802 is connected to the adapter 803 at one end of the telescopic hose 11. The other end of the telescopic hose 11 is connected to the small solenoid valve and air source inside the equipment. During each test, the solenoid valve is opened instantly by the program control, and a high-pressure airflow is ejected.

[0038] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A PCB flying probe testing obstacle avoidance detection mechanism, comprising a testing frame (1) and a telescopic hose (11), characterized in that: The testing frame (1) is provided with a threaded rod (2), and the threaded rod (2) is externally threaded to a guide block (3). A limit frame (4) is fixedly connected to the front of the guide block (3). A guide rail plate (5) is provided inside the limit frame (4). A testing head (6) is provided below the guide rail plate (5). An obstacle sensor (9) is connected above the guide rail plate (5). A protective cover (10) is provided above the guide rail plate (5). A slot (15) is fixedly connected to the side of the protective cover (10). A snap-fit ​​structure (7) is provided above the guide rail plate (5). The snap-fit ​​structure (7) is snapped into the slot (15). A transparent plate (14) is fixedly connected above the protective cover (10). A cleaning structure (8) is provided above the protective cover (10). The cleaning structure (8) is connected to the telescopic hose (11). The snap-fit ​​structure (7) includes an auxiliary frame (701) and a thumb push plate (702). A locking block (703) is fixedly connected to the left side of the thumb push plate (702). A spring (705) is provided to the right side of the thumb push plate (702). A limit plate (704) is fixedly connected inside the auxiliary frame (701).

2. The obstacle avoidance detection mechanism for PCB flying probe testing according to claim 1, characterized in that, The auxiliary frame (701) is fixedly connected above the guide rail plate (5), the locking block (703) is locked in the slot (15), the thumb push plate (702) is slidably connected in the auxiliary frame (701), the limiting plate (704) overlaps with the left side of the thumb push plate (702), and the thumb push plate (702) is connected in the auxiliary frame (701) by a spring (705).

3. The obstacle avoidance detection mechanism for PCB flying probe testing according to claim 1, characterized in that, A driver (12) is provided above the testing frame (1). The output shaft of the driver (12) is connected to the threaded rod (2). The telescopic hose (11) is located on the front of the testing frame (1).

4. The obstacle avoidance detection mechanism for PCB flying probe testing according to claim 1, characterized in that, Two columns (13) are fixedly connected above the guide rail plate (5). The columns (13) are snapped into the protective cover (10). The obstacle sensor (9) is located inside the protective cover (10).

5. The obstacle avoidance detection mechanism for PCB flying probe testing according to claim 1, characterized in that, The cleaning structure (8) includes a miniature jet nozzle plate (801) and an adapter (803). The miniature jet nozzle plate (801) is fixedly connected to the top of the protective cover (10), and a thin tube (802) is fixedly connected to the back of the miniature jet nozzle plate (801).

6. The obstacle avoidance detection mechanism for PCB flying probe testing according to claim 5, characterized in that, The adapter (803) is fixedly connected to one end of the telescopic hose (11), and a sealing head (804) is connected to one end of the thin tube (802). The sealing head (804) is threadedly connected to the adapter (803).

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