A pcb board back drilling optical detection fixture

Abstract

The utility model relates to optical detection technical field, concretely to a kind of pcb back drilling optical detection fixture, comprising: base, the top rear end of the base is fixedly installed with guide rail one, the top front end of the base is fixedly installed with guide rail two, the outer wall sliding connection of the guide rail one has slider one, the outer wall sliding connection of the guide rail two has slider two, the top of the base is fixedly connected with push rod shell, the outer wall fixedly installed with motor of the push rod shell, the output end fixedly connected with gear one of the motor, the outer wall meshing connection has gear two of the gear one, the side fixedly connected with threaded rod of the gear two;Beneficial effect is: using symmetrical clamping strip to fix pcb, multiple independent and symmetrical clamping areas can be formed on clamp, so that multiple pcb remain stable and do not interfere with each other when detecting, so as to support multiple pcb to carry out detection simultaneously, help to improve detection efficiency, to adapt to the demand of detection speed in mass production.

Description

Technical Field

[0001] This utility model relates to the field of optical inspection technology, specifically to an optical inspection fixture for back-drilling holes in PCB boards. Background Technology

[0002] Optical inspection of back-drilled holes is a step in the PCB manufacturing process to check the quality of back-drilled holes. Optical inspection uses optical imaging equipment to observe the shape and position of back-drilled holes, identify potential defects, and ensure that the holes meet design requirements. It is an important step in ensuring the reliability of PCB products and is carried out throughout the later inspection stage of PCB production.

[0003] The PCB back-drilled hole optical inspection fixture is a device that assists in completing the above-mentioned inspection. Its main function is to fix and position the PCB, so that the PCB remains stable during the inspection process, ensuring that the optical imaging equipment can accurately acquire the image information of the back-drilled hole, and providing a stable basic condition for the inspection work.

[0004] In existing technologies, most optical inspection fixtures for back-drilling PCBs can only fix and inspect a single PCB. They lack a layout design to accommodate multiple PCBs simultaneously, making it impossible to support simultaneous inspection of multiple boards. This limits inspection efficiency and makes it difficult to meet the speed requirements of mass production. Therefore, this invention proposes an optical inspection fixture for back-drilling PCBs to solve the above problems. Utility Model Content

[0005] The purpose of this utility model is to provide an optical inspection fixture for back-drilling holes in PCB boards, in order to solve the problem that most optical inspection fixtures for back-drilling holes in PCB boards proposed in the background art can only fix and inspect a single PCB board. They lack a layout design that can accommodate multiple PCB boards at the same time and cannot support simultaneous inspection of multiple boards. This limits the inspection efficiency to a certain extent and makes it difficult to meet the inspection speed requirements in mass production.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a PCB back-drilling optical inspection fixture, comprising a base, a guide rail one fixedly mounted at the rear top of the base, a guide rail two fixedly mounted at the front top of the base, a slider one slidably connected to the outer wall of the guide rail one, a slider two slidably connected to the outer wall of the guide rail two, a push rod housing fixedly connected to the top of the base, a motor fixedly mounted on the outer wall of the push rod housing, a gear one fixedly connected to the output end of the motor, a gear two meshing with the outer wall of the gear one, a threaded rod fixedly connected to one side of the gear two, a transmission rod slidably connected inside the push rod housing, and the outer wall of the transmission rod fixedly connected to the outer wall of the slider one.

[0007] Preferably, the inner wall of the transmission rod is provided with a threaded groove, and the outer wall of the threaded rod fits the shape of the threaded groove inside the transmission rod to form a threaded connection.

[0008] Preferably, the inner walls of both slider one and slider two are provided with I-shaped grooves, and the outer walls of guide rail one and guide rail two fit the shape of the I-shaped grooves.

[0009] Preferably, the positions of slider one and slider two are corresponding, and a clamping strip is fixedly connected to the side of slider one near slider two, and the other end of the clamping strip is fixedly connected to the outer wall of slider two.

[0010] Preferably, the clamping strip has a square groove inside.

[0011] Preferably, a glass plate is fixedly installed on the inner wall of the base.

[0012] Preferably, a switch and a button are fixedly connected to the front outer wall of the base.

[0013] Compared with the prior art, the beneficial effects of this utility model are: by using symmetrical clamping strips to fix the PCB, multiple independent and symmetrical clamping areas can be formed on the fixture, so that multiple PCBs remain stable and do not interfere with each other during testing, thereby supporting the simultaneous testing of multiple PCBs, which helps to improve testing efficiency and meet the needs of testing speed in mass production. Attached Figure Description

[0014] Figure 1 This is a front perspective view of the overall structure of this utility model;

[0015] Figure 2 This is a top view of the overall structure of this utility model;

[0016] Figure 3 This is a partial structural cross-sectional view of the push rod housing of the present invention.

[0017] Figure 4 This is a cross-sectional view of the overall structure of this utility model.

[0018] In the diagram: 1. Base; 2. Guide rail one; 3. Slider one; 4. Guide rail two; 5. Slider two; 6. Push rod housing; 7. Transmission rod; 8. Motor; 9. Gear one; 10. Gear two; 11. Threaded rod; 12. Threaded groove; 13. I-beam groove; 14. Clamping bar; 15. Glass plate; 16. Switch; 17. Button. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clear and complete, the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only some, not all, embodiments of this utility model, and are merely used to explain the embodiments of this utility model. They are not intended to limit the embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] Please see Figures 1 to 3 This utility model provides a technical solution: a PCB back-drilling optical inspection fixture, including a base 1, which serves as the mounting base for the entire fixture. A guide rail 2 is fixedly mounted on the rear top of the base 1, and a guide rail 4 is fixedly mounted on the front top of the base 1. The guide rails 2 and 4 are parallel to each other, providing guidance and support for the sliding of the slider. A slider 3 is slidably connected to the outer wall of the guide rail 2, and a slider 5 is slidably connected to the outer wall of the guide rail 4. I-grooves 13 are formed on the inner walls of both slider 3 and slider 5. The shape of the I-shaped groove 13 fits the guide rail. Through the cooperation between the I-shaped groove 13 and the guide rail, it is ensured that the slider 1 3 and the slider 2 5 can slide stably along the guide rail and avoid deviation. The positions of slider 1 3 and slider 2 5 are corresponding, and the two are rigidly connected by the clamping strip 14. The clamping strip 14 is fixedly connected to the side of slider 1 3 near slider 2 5. The other end of the clamping strip 14 is fixedly connected to the outer wall of slider 2 5, so that slider 1 3, slider 2 5 and clamping strip 14 form a synchronous movement integral structure. The inside of the clamping strip 14 is provided with a square groove for adapting the installation of subsequent functional components.

[0021] Specifically, during operation, the PCB to be inspected is placed in the inspection area at the top of the base 1. Based on the PCB size and inspection requirements, the drive mechanism moves slider 3 along guide rail 2 and slider 5 along guide rail 4, adjusting the relative position of the clamping strip 14 with the PCB so that it approaches the edge of the PCB. The slider is then driven further, gradually bringing the clamping strip 14 closer to the PCB. The rigid connection of the clamping strip 14 provides a stable clamping effect on the PCB. During this process, it is crucial to ensure that the PCB remains stable and without displacement or deformation under the clamping force. After clamping, once the PCB is confirmed to be stable under the fixation of the clamping strip 14, the optical inspection equipment can be started for inspection. After inspection, the slider is driven in the opposite direction to move the clamping strip 14 away from the PCB, and the inspected PCB is removed, completing one operation cycle.

[0022] Secondly, a push rod housing 6 is fixedly connected to the top of the base 1. The push rod housing 6 serves as the mounting carrier for the drive mechanism. A motor 8 is fixedly mounted on the outer wall of the push rod housing 6. The motor 8 provides power output for the entire drive system. Through multi-motor coordinated control, the two motors 8 at the top of the base 1 are ensured to operate synchronously. A gear 9 is fixedly connected to the output end of the motor 8. A gear 10 is meshed with the outer wall of the gear 9. Power transmission is achieved through gear meshing. A threaded rod 11 is fixedly connected to one side of the gear 10, so that the rotational motion of the gear 10 is synchronously transmitted to the threaded rod 11. A transmission rod 7 is slidably connected inside the push rod housing 6. The outer wall of the transmission rod 7 is connected to the slider 3. The outer wall is fixedly connected, which can drive the slider 3 to move synchronously with it. The inner wall of the transmission rod 7 is provided with a threaded groove 12. The outer wall of the threaded rod 11 fits the shape of the threaded groove 12 inside the transmission rod 7 to form a threaded connection. When the threaded rod 11 rotates, the transmission rod 7 is driven to slide axially along the inside of the push rod housing 6 through the threaded engagement, realizing the conversion of power into linear motion. The front outer wall of the base 1 is fixedly connected with a switch 16 and a button 17, which together constitute the operation control component for realizing the start and stop of the equipment and the switching of functions. The inner wall of the base 1 is fixedly installed with a glass plate 15. The glass plate 15 serves as the load-bearing and light-transmitting structure of the detection area, providing an observation channel for the optical detection equipment.

[0023] Specifically, during operation, the PCB to be tested is placed in the testing position above the glass plate 15. The power is turned on by pressing the switch 16 on the front of the base 1. The desired clamping mode and stroke parameters are selected by pressing the button 17. After starting, the motor 8 outputs power to drive the gear 9 to rotate. The gear 9 drives the gear 10 to rotate synchronously through meshing. The gear 10 drives the threaded rod 11 to rotate. The threaded rod 11 uses the threaded engagement with the threaded groove 12 on the inner wall of the transmission rod 7 to drive the transmission rod 7 to slide axially along the inside of the push rod housing 6. The transmission rod 7 then drives the slider 3 to move synchronously, realizing the clamping and position adjustment of the PCB. After the PCB is fixed in place, the optical inspection equipment inspects the back drilled hole through the glass plate 15. During the inspection, the position of the transmission rod 7 can be adjusted in real time by pressing the button 17 to optimize the inspection angle. After the inspection is completed, the motor 8 is reversed by pressing the button 17. Through gear transmission and thread engagement, the transmission rod 7 is reset, the PCB is released, and finally the power is turned off by turning off the switch 16. The inspected PCB is removed and the surface of the glass plate 15 is cleaned.

[0024] During operation, place the PCB to be tested on the testing position on the top glass plate 15 of the base 1, press switch 16 to power on, and select the clamping mode and stroke parameters using button 17. After startup, motor 8 drives gear 9 to rotate, meshing with drive gear 10 and threaded rod 11. Threaded rod 11 engages with the threaded groove 12 of transmission rod 7, driving transmission rod 7 to slide along push rod housing 6. This causes slider 3 to move synchronously along guide rail 2, and slider 5 to move synchronously with clamping bar 14 along guide rail 4. Adjust clamping bar 14 to the edge of the PCB and bring it close, using rigid connection for stable clamping to ensure no offset or deformation. After fixing, the optical equipment is tested through glass plate 15. During the process, the position and angle of transmission rod 7 can be optimized by pressing button 17. After testing, press button 17 to reverse motor 8, reset transmission rod 7, release clamping bar 14, turn off switch 16, remove the PCB, and clean glass plate 15 to complete the operation.

[0025] Although 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 alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A PCB back-drilling optical inspection fixture, characterized in that: Including the base (1); The top rear end of the base (1) is fixedly installed with a guide rail one (2), the top front end of the base (1) is fixedly installed with a guide rail two (4), the outer wall of the guide rail one (2) is slidably connected with a slider one (3), and the outer wall of the guide rail two (4) is slidably connected with a slider two (5). A push rod housing (6) is fixedly connected to the top of the base (1). A motor (8) is fixedly installed on the outer wall of the push rod housing (6). A gear (9) is fixedly connected to the output end of the motor (8). A gear (10) is meshed with the outer wall of the gear (9). A threaded rod (11) is fixedly connected to one side of the gear (10). A transmission rod (7) is slidably connected inside the push rod housing (6). The outer wall of the transmission rod (7) is fixedly connected to the outer wall of the slider (3).

2. The PCB back-drilling optical inspection fixture according to claim 1, characterized in that: The inner wall of the transmission rod (7) is provided with a threaded groove (12), and the outer wall of the threaded rod (11) fits the shape of the threaded groove (12) inside the transmission rod (7) to form a threaded connection.

3. The PCB back-drilling optical inspection fixture according to claim 1, characterized in that: The inner walls of slider one (3) and slider two (5) are provided with I-shaped grooves (13), and the outer walls of guide rail one (2) and guide rail two (4) fit the shape of the I-shaped grooves (13).

4. The PCB back-drilling optical inspection fixture according to claim 1, characterized in that: The slider one (3) is positioned corresponding to the slider two (5). A clamping strip (14) is fixedly connected to the side of the slider one (3) near the slider two (5), and the other end of the clamping strip (14) is fixedly connected to the outer wall of the slider two (5).

5. The PCB back-drilling optical inspection fixture according to claim 4, characterized in that: The clamping bar (14) has a square groove inside.

6. The PCB back-drilling optical inspection fixture according to claim 1, characterized in that: A glass plate (15) is fixedly installed on the inner wall of the base (1).

7. The PCB back-drilling optical inspection fixture according to claim 1, characterized in that: A switch (16) is fixedly connected to the front outer wall of the base (1), and a button (17) is fixedly connected to the front outer wall of the base (1).

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