A PCB board measuring instrument with automatic feeding

Abstract

The present invention discloses an automatic feeding PCB board measuring instrument, which is provided with a base, an operator is installed on the side of the base; a cylinder is installed on the inner side of the top of the column, and a measuring head for measuring the size of the PCB board is connected to the output shaft of the cylinder; it includes: a bearing platform movably arranged on the upper end surface of the base, the bearing platform is used to place the PCB board for measurement; a limiting mechanism symmetrically arranged at both ends of the bearing platform, the limiting mechanism automatically limits or releases the limit of the PCB board according to the movement of the bearing platform; a cleaning component is arranged at the edge of the bearing platform. This automatic feeding PCB board measuring instrument can simultaneously press and limit the edge of the PCB board during the automatic loading process of the PCB board to ensure the stability of the position during measurement. Before measurement, on the one hand, dust on the surface of the PCB board can be cleaned, and on the other hand, dust on the measuring head can be wiped, which can improve the accuracy of subsequent measurement data.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB board measurement, in particular to an automatic feeding PCB board measuring instrument. Background Art

[0002] During the manufacturing process, PCB boards need to undergo a series of inspections and measurements. Measuring instruments are usually used to automatically measure their dimensions so that they can adapt to different processing needs. During the measurement process, the PCB board's position must be kept stable. For example, a dimensional inspection device for PCB board production, published as CN211504004U, replaces the bracket that secures the monitor to the desktop with a fixed bracket device. The fixed bracket device is fixed to the inside of a connecting plate via a slider, allowing the monitor to be fixed to the desktop via a connecting column without the risk of being knocked off or knocked over. Furthermore, the groove, which is almost the same length as the connecting plate, allows the monitor to be moved on the connecting plate via a fixed base, making the use of the monitor on the image measuring instrument safer.

[0003] For example, the line width and line spacing measuring instrument with publication number CN218865005U drives the rotating cover to rotate by the first motor, thereby driving the PCB board placed on the top of the support plate to rotate, so as to facilitate the measurement of its width and length. The support plate is driven up and down by the hydraulic rod, so as to facilitate the movement of the PCB board to the specified height for measurement. The push plate is pushed to the bottom of the corresponding support plate by the electric push rod, thereby avoiding deviation and shaking during the fixing process according to the size of the PCB board, which causes the position of the PCB board to deviate during the measurement process and leads to inaccurate measurement results. The outer support plate is connected to the inner support plate by the electromagnet adsorption baffle, and the movement of the PCB board is more stable.

[0004] For example, a PCB board size measuring device with publication number CN213067444U includes a gantry image measuring instrument, which can facilitate the placement of defective products for centralized processing. When not in use, it can also be easily stored to avoid interfering with people's activities. After long-term use, the loading platform of the gantry image measuring instrument can be cleaned regularly to ensure the hygiene of the gantry image measuring instrument, bringing better use prospects. However, the above-mentioned measuring device still has the following shortcomings in actual use:

[0005] 1. During the automatic loading process of PCB boards, there is a lack of a structure to automatically and synchronously limit the position of the PCB boards. Usually, an additional limiting structure is required to limit the position of the PCB boards. This makes the operation inconvenient and easily causes the position of the PCB boards to shift.

[0006] 2. Before measuring the PCB board, a small amount of dust will adhere to the surface of the PCB board and the surface of the measuring head. The lack of an automatic cleaning structure will result in inaccurate measurement data and require a second measurement. Manual wiping will cause the position of the PCB board and the measuring head to change.

[0007] In response to the above problems, it is urgent to carry out innovative design based on the original measuring instrument. Summary of the Invention

[0008] The present invention aims to provide an automatic feeding PCB board measuring instrument to solve the problems raised in the above-mentioned background art, namely, the lack of a structure for automatically and synchronously limiting the position of the PCB board during the automatic feeding process of the PCB board, and the lack of a structure for automatically cleaning a small amount of dust that adheres to the surface of the PCB board and the surface of the measuring head before the PCB board is measured.

[0009] To achieve the above object, the present invention provides the following technical solution: an automatic feeding PCB board measuring instrument is provided with a base, an operator is installed on the side of the base, and a column is fixed to the back of the base by bolts;

[0010] A cylinder is installed on the inner side of the top of the column, and a measuring head for measuring the size of the PCB is connected to the output shaft of the cylinder;

[0011] It includes: a carrying platform, which is movably arranged on the upper end surface of the machine base, and the carrying platform is used to place the PCB board for measurement;

[0012] Limiting mechanisms are symmetrically arranged at both ends of the carrying platform, and the limiting mechanisms automatically limit or release the PCB board according to the movement of the carrying platform;

[0013] A cleaning component is arranged at the edge of the supporting platform. The cleaning component cooperates with the gas delivery mechanism to clean the dust on the surface of the PCB board through gas on the one hand, and clean the dust on the lower end surface of the measuring head on the other hand. The gas delivery mechanism is arranged inside the column.

[0014] Preferably, tooth blocks are fixed at equal intervals on the central axis of the lower end face of the supporting platform, and gears are meshed and connected below the tooth blocks, and the gears are driven by a motor. The meshing transmission of the tooth blocks and the gears enables the horizontal movement of the supporting platform on the upper end face of the machine base, thereby realizing automatic loading of PCB boards.

[0015] Preferably, the limiting mechanism includes a limiting plate passing through both ends of the supporting platform, and the limiting plate and the supporting platform are slidably connected, and the limiting plate is an inverted "L"-shaped structure. At the same time, a movable groove is opened on the machine base outside the limiting plate, and the limiting plate forms a sliding structure through the movable groove and the machine base. When the supporting platform moves, it can drive the limiting plate to move synchronously and slide in the movable groove.

[0016] Preferably, a connecting rod is fixed to the bottom of the limit plate, and a guide groove is provided on the machine base at the end of the connecting rod, and the machine base and the guide groove are slidably connected. At the same time, the guide groove is an inclined structure. When the limit plate moves, it can slide in the guide groove through the connecting rod, and the limit plate can be driven to rise and fall through the inclined guide groove.

[0017] Preferably, the cleaning component includes a fixed plate fixed at the edge of the supporting platform, and a cleaning block is pasted on the top of the fixed plate, and the cleaning block is used to clean the measuring head. At the same time, air outlet holes are reserved at equal intervals on the fixed plates on both sides of the cleaning block, and the cleaning component also includes a nozzle fixed at the bottom edge of the supporting platform. When the supporting platform moves, it drives the fixed plate to move synchronously, and then drives the cleaning block to wipe the measuring head, and at the same time improves the cleaning efficiency through the air outlet holes.

[0018] Preferably, a locking mechanism is provided on the side of the fixed plate close to the column, which can lock the position of the measuring head, and the locking mechanism includes a fixed block fixed to the side of the fixed plate, and a fixed groove is provided on the column at one end of the fixed block away from the fixed plate. When the fixed plate moves, the fixed block is driven to move, and when it approaches the column, the fixed block can be driven to pass through the fixed groove and contact the guide block.

[0019] Preferably, a guide block is provided on the inner side of the fixed groove, and the side of the guide block away from the fixed block is fixedly connected to one end of the movable rod, and a spring is provided between the movable rod and the fixed groove. At the same time, a fixing hole is reserved on the cylinder output shaft at the other end of the movable rod, and the movable rod and the fixing hole are snap-fitted. When the guide block is pushed, it can drive the movable rod to slide in the column and drive the movable rod to separate from the fixing hole.

[0020] Preferably, the gas transmission mechanism includes a fixed cylinder passing through the column, and a piston block is slidably provided inside the fixed cylinder, and one side of the piston block is connected to the inner wall of the fixed cylinder through a spring, and the other side of the piston block is connected to the supporting platform through a traction rope. When the supporting platform moves, the piston block can be pulled to move in the fixed cylinder by the traction rope to realize gas transmission.

[0021] Preferably, a first air outlet pipe passes through one end of the fixed cylinder, and the first air outlet pipe and the fixed cavity are communicated with each other, and the fixed cavity is arranged in the column. At the same time, the fixed cavity is communicated with the connecting cavity through the connecting pipe, and the connecting cavity and the air outlet are connected. The connecting cavity is arranged inside the fixed plate, and the air outlet is arranged on the top of the fixed plate. When the piston block moves to the left, the gas in the fixed cylinder can be transmitted to the fixed cavity through the first air outlet pipe, and then enters the connecting cavity and is discharged from the air outlet.

[0022] Preferably, the other end of the fixed cylinder is fixedly connected to one end of the second air outlet pipe, and the other end of the second air outlet pipe is communicated with the nozzle head through another connecting pipe, and the nozzle heads are arranged on the inner side of the fixed plate at equal intervals. At the same time, a one-way valve is provided in the first air outlet pipe and the second air outlet pipe, and the connecting pipe is spring-shaped. When the piston block moves to the right, the gas in the fixed cylinder can be transmitted to the other connecting pipe through the second air outlet pipe, and finally from the nozzle head.

[0023] Compared with the prior art, the present invention has the following beneficial effects: the automatic feeding PCB board measuring instrument can simultaneously press and limit the edge of the PCB board during the automatic PCB board feeding process to ensure the stability of the position during measurement. In addition, before measurement, the dust on the surface of the PCB board can be cleaned and the dust on the measuring head can be wiped, which can improve the accuracy of subsequent measurement data. The specific contents are as follows:

[0024] 1. When the load platform moves outward, the limit plate moves synchronously with it. The bottom of the limit plate slides in the guide groove through the connecting rod. The guide groove allows the limit plate to rise continuously during the movement. Then the load platform moves in the opposite direction. The guide groove also guides the limit plate to drop continuously. When the load platform moves to the specified position, the limit plate is driven to press the PCB board, thereby ensuring its position stability during subsequent measurements.

[0025] 2. As the platform moves, it drives the cleaning block on the fixed plate to wipe the measuring head, ensuring the accuracy of subsequent testing. When the platform moves closer to the column, the air discharged from the air nozzle can clean the dust on the PCB, further improving the accuracy of the measurement.

[0026] 3. When the carrier moves close to the column, it can drive the fixed block through the fixed slot and push the guide block and movable rod to move in the column. After the movable rod moves, it can be pulled out of the fixed hole to release the lock on the measuring head. After the carrier moves and drives the fixed block and the guide block to separate, it drives the movable rod through the fixed hole of the cylinder output shaft again to lock the measuring head, thus preventing the measuring head from falling down due to malfunction or other reasons.

[0027] 4. When the supporting platform is away from the column, the piston block can be pulled to move by the traction rope. When the piston block moves to the left, the gas in the fixed cylinder can be transmitted to the fixed cavity through the first outlet pipe, and finally discharged from the outlet hole. Therefore, when the cleaning block wipes the measuring head, the exhaust gas can improve the cleaning efficiency. When the piston block moves to the right, the gas in the fixed cylinder can be transmitted to another connecting pipe through the second outlet pipe, and finally discharged from the nozzle and blown onto the PCB board for cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the front view structure of the present invention;

[0029] Figure 2 This is a side structural diagram of the limiting plate of the present invention;

[0030] Figure 3 This is a schematic diagram of the structure after the limit plate of the present invention is raised;

[0031] Figure 4 It is a schematic diagram of the side sectional structure of the present invention;

[0032] Figure 5 This is a side structural diagram of the movable rod of the present invention;

[0033] Figure 6 This is a schematic diagram of the side cross-section structure of the fixed cylinder of the present invention;

[0034] Figure 7 This is a schematic diagram of a partial back section structure of a column according to the present invention;

[0035] Figure 8 It is a schematic diagram of the side sectional structure of the fixing plate of the present invention.

[0036] In the figure: 1. Machine base; 2. Operator; 3. Column; 4. Cylinder; 5. Measuring head; 6. Carrying platform; 7. Gear block; 8. Gear; 9. Limit plate; 10. Movable groove; 11. Connecting rod; 12. Guide groove; 13. Traction rope; 14. Piston block; 15. Fixed cylinder; 16. First air outlet pipe; 17. Fixed cavity; 18. Connecting pipe; 19. Fixed plate; 20. Injection head; 21. Second air outlet pipe; 22. Connecting cavity; 23. Air outlet hole; 24. Cleaning block; 25. Fixed block; 26. Fixed groove; 27. Guide block; 28. Movable rod; 29. ​​Fixed hole. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] See also Figures 1-8 , the present invention provides the following technical solutions:

[0039] Embodiment 1: In order to solve the problems existing in the prior art, this embodiment adopts the following technical solutions: an automatic feeding PCB board measuring instrument is provided with a base 1, an operator 2 is installed on the side of the base 1, and a column 3 is fixed to the back of the base 1 by bolts; a cylinder 4 is installed on the top inner side of the column 3, and a measuring head 5 for measuring the size of the PCB board is connected to the output shaft of the cylinder 4; it includes: a bearing platform 6, which is movably arranged on the upper end surface of the base 1, and the bearing platform 6 is used to place the PCB board for measurement; a limiting mechanism, which is symmetrically arranged at both ends of the bearing platform 6, and the limiting mechanism automatically limits or releases the limit of the PCB board according to the movement of the bearing platform 6; a cleaning component, which is arranged at the edge of the bearing platform 6, and the cleaning component cooperates with the gas supply mechanism to clean the dust on the surface of the PCB board through gas on the one hand, and clean the dust on the lower end surface of the measuring head 5 on the other hand, and the gas supply mechanism is arranged inside the column 3.

[0040] Gear blocks 7 are fixed at equal intervals on the central axis of the lower end surface of the carrier 6, and a gear 8 is meshed and connected below the gear block 7, and the gear 8 is driven by a motor. First, the PCB board to be measured can be placed on the carrier 6, and then the PCB board is limited by the limit mechanism. When the carrier 6 moves, on the one hand, the measuring head 5 can be wiped by the cleaning component, and on the other hand, the dust on the PCB board can be cleaned by gas, thereby ensuring the accuracy of the measurement. Then, the carrier 6 is moved to the position directly below the measuring head 5 through the automatic feeding placement, and the size of the PCB board is measured by the measuring head 5, which is convenient for the operator to operate through the operator 2.

[0041] Example 2: The existing measuring instrument lacks a structure for automatically limiting the position of the PCB board during automatic loading, which causes the position of the PCB board to be easily offset during subsequent measurements. Therefore, this embodiment adopts the following technical solutions, such as Figures 1-4As shown, the limiting mechanism includes a limiting plate 9 that passes through both ends of the supporting platform 6, and the limiting plate 9 and the supporting platform 6 are slidably connected, and the limiting plate 9 is an inverted "L"-shaped structure, and a movable groove 10 is provided on the machine base 1 outside the limiting plate 9, and the limiting plate 9 forms a sliding structure with the machine base 1 through the movable groove 10; a connecting rod 11 is fixed to the bottom of the limiting plate 9, and a guide groove 12 is provided on the machine base 1 at the end of the connecting rod 11, and the machine base 1 and the guide groove 12 are slidably connected, and the guide groove 12 is an inclined structure; when the supporting platform 6 moves outward, it drives the limiting plate 9 to move synchronously, and ... The plate 9 slides in the movable groove 10, and the bottom of the limit plate 9 slides in the guide groove 12 through the connecting rod 11. The guide groove 12 allows the limit plate 9 to rise continuously during the movement. After that, the PCB board to be measured is placed on the carrier 6, and the carrier 6 moves in the opposite direction. Similarly, the guide groove 12 guides the limit plate 9 to continuously decrease in height until the carrier 6 moves to the specified position. Then, the limit plate 9 can be driven to press the PCB board, thereby ensuring the stability of its position during subsequent measurements. After the carrier 6 moves out, the limit on the PCB board can be automatically released.

[0042] Example 3: The existing measuring instrument lacks a structure for cleaning the measuring head 5 and the PCB board before detection, which will affect the accuracy of the measurement. Therefore, this embodiment adopts the following technical solutions, such as Figure 4 and Figure 8 As shown, the cleaning assembly includes a fixed plate 19 fixed to the edge of the carrier 6, and a cleaning block 24 is attached to the top of the fixed plate 19. The cleaning block 24 is used to clean the measuring head 5. At the same time, air outlet holes 23 are reserved at equal intervals on the fixed plate 19 on both sides of the cleaning block 24. The cleaning assembly also includes an air nozzle 20 fixed to the bottom edge of the carrier 6. When the carrier 6 moves, the fixed plate 19 moves synchronously. When it moves away from the column 3, it can drive the cleaning block 24 on the fixed plate 19 to wipe the measuring head 5, ensuring the accuracy of subsequent detection. When the carrier 6 moves toward the column 3, the dust on the PCB board can be cleaned by the gas discharged from the air nozzle 20, further improving the accuracy of the measurement.

[0043] Example 4: The measuring head 5 on the existing measuring instrument is prone to self-degradation due to failure or other reasons, and lacks a locking structure. Therefore, this embodiment adopts the following technical solutions, such as Figure 5-Figure 7As shown, a locking mechanism is provided on the side of the fixing plate 19 close to the column 3, which can lock the position of the measuring head 5, and the locking mechanism includes a fixing block 25 fixed to the side of the fixing plate 19, and a fixing groove 26 is provided on the column 3 at one end of the fixing block 25 away from the fixing plate 19; a guide block 27 is provided on the inner side of the fixing groove 26, and the guide block 27 is fixedly connected to one end of a movable rod 28 on the side away from the fixing block 25, and a spring is provided between the movable rod 28 and the fixing groove 26, and a fixing hole 29 is reserved on the output shaft of the cylinder 4 at the other end of the movable rod 28, and the movable rod 28 and the fixing hole 29 are snap-fitted; when the supporting platform 6 moves to the position aligned with the column 3, When the columns 3 are close to each other, the fixed block 25 can be driven to pass through the fixed groove 26, and the fixed block 25 can be driven to contact the guide block 27, so as to push the guide block 27 and the movable rod 28 to move in the column 3. After the movable rod 28 moves, it can be pulled out from the fixing hole 29, so that the measuring head 5 can be driven by the cylinder 4 to descend to the designated position for measurement. After the carrying platform 6 moves and drives the fixed block 25 to separate from the guide block 27, the guide block 27 and the movable rod 28 can be driven to move in the opposite direction by the resilience of the spring, and the movable rod 28 can be driven to pass through the fixing hole 29 of the output shaft of the cylinder 4, so as to lock the measuring head 5, thereby preventing the measuring head 5 from descending by itself due to a malfunction or other reasons.

[0044] Example 5: The existing measuring instrument requires additional gas supply equipment when cleaning objects, and does not use the movement of the carrier 6 to generate gas. Therefore, this embodiment adopts the following technical solutions, such as Figure 6-Figure 8As shown, the gas transmission mechanism includes a fixed cylinder 15 that passes through the column 3, and a piston block 14 is slidably provided inside the fixed cylinder 15, and one side of the piston block 14 is connected to the inner wall of the fixed cylinder 15 by a spring, and the other side of the piston block 14 is connected to the supporting platform 6 by a traction rope 13; a first air outlet pipe 16 is passed through one end of the fixed cylinder 15, and the first air outlet pipe 16 and the fixed cavity 17 are communicated with each other, and the fixed cavity 17 is arranged in the column 3, and the fixed cavity 17 is communicated with the connecting cavity 22 by a connecting pipe 18, and the connecting cavity 22 is connected to the air outlet hole 23, and the connecting cavity 22 is arranged inside the fixed plate 19, and the air outlet hole 23 is arranged on the top of the fixed plate 19; the other end of the fixed cylinder 15 is fixedly connected to one end of the second air outlet pipe 21, and the other end of the second air outlet pipe 21 is communicated with the nozzle 20 by another connecting pipe 18, and the nozzles 20 are arranged on the inner side of the fixed plate 19 at equal intervals, When the support platform 6 is away from the column 3, the piston block 14 can be pulled to move by the traction rope 13. When the piston block 14 moves to the left, the gas in the fixed cylinder 15 can be transmitted to the fixed cavity 17 through the first gas outlet pipe 16, and then enter the connecting cavity 22 through one of the connecting pipes 18, and finally be discharged from the gas outlet 23. Therefore, when the cleaning block 24 wipes the measuring head 5, the cleaning efficiency can be improved by the discharged gas. When the piston block 14 moves to the right, the gas in the fixed cylinder 15 can be transmitted to the other connecting pipe 18 through the second gas outlet pipe 21, and finally be discharged from the nozzle head 20 and blown onto the PCB board for cleaning. Therefore, the support platform 6 can be moved outward to clean the measuring head 5, and in the process of returning to the bottom of the measuring head 5, the PCB board can be cleaned, so as to improve the accuracy of subsequent measurements.

[0045] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An automatic feeding PCB board measuring instrument, provided with a base (1), an operator (2) is installed on the side of the base (1), and a column (3) is fixed to the back of the base (1) by bolts; A cylinder (4) is installed on the inner side of the top of the column (3); a measuring head (5) for measuring the size of the PCB board is connected to the output shaft of the cylinder (4); It is characterized by: include: A bearing platform (6) is movably arranged on the upper end surface of the machine base (1), and the bearing platform (6) is used to place a PCB board for measurement; A limiting mechanism is symmetrically arranged at both ends of the bearing platform (6), and the limiting mechanism automatically limits or releases the limit of the PCB board according to the movement of the bearing platform (6); A cleaning component is arranged at the edge of the carrier platform (6), and the cleaning component cooperates with the gas delivery mechanism to clean the dust on the surface of the PCB board through gas on the one hand, and clean the dust on the lower end surface of the measuring head (5) on the other hand, and the gas delivery mechanism is arranged inside the column (3); The limiting mechanism includes a limiting plate (9) passing through both ends of the supporting platform (6), and the limiting plate (9) and the supporting platform (6) are slidably connected, and the limiting plate (9) is an inverted "L"-shaped structure, and a movable groove (10) is provided on the machine base (1) outside the limiting plate (9), and the limiting plate (9) forms a sliding structure with the machine base (1) through the movable groove (10); The cleaning assembly includes a fixing plate (19) fixed at the edge of the carrier (6), and a cleaning block (24) is attached to the top of the fixing plate (19), and the cleaning block (24) is used to clean the measuring head (5), and air outlet holes (23) are reserved at equal intervals on the fixing plate (19) on both sides of the cleaning block (24), and the cleaning assembly also includes an air jet head (20) fixed at the bottom edge of the carrier (6); The gas transmission mechanism includes a fixed cylinder (15) penetrating the column (3), and a piston block (14) is slidably provided inside the fixed cylinder (15), and one side of the piston block (14) is connected to the inner wall of the fixed cylinder (15) through a spring, and the other side of the piston block (14) is connected to the supporting platform (6) through a traction rope (13).

2. The automatic feeding PCB board measuring instrument according to claim 1, characterized in that: Gear blocks (7) are fixed at equal intervals on the central axis of the lower end surface of the bearing platform (6), and a gear (8) is meshedly connected below the gear block (7), and the gear (8) is driven by a motor.

3. The automatic feeding PCB board measuring instrument according to claim 1, characterized in that: A connecting rod (11) is fixed to the bottom of the limiting plate (9), and a guide groove (12) is provided on the machine base (1) at the end of the connecting rod (11), and the machine base (1) and the guide groove (12) are slidably connected, and the guide groove (12) is an inclined structure.

4. The automatic feeding PCB board measuring instrument according to claim 1, characterized in that: A locking mechanism is provided on one side of the fixing plate (19) close to the column (3), and the locking mechanism can lock the position of the measuring head (5). The locking mechanism includes a fixing block (25) fixed to the side of the fixing plate (19), and a fixing groove (26) is provided on the column (3) at one end of the fixing block (25) away from the fixing plate (19).

5. The automatic feeding PCB board measuring instrument according to claim 4, characterized in that: A guide block (27) is provided on the inner side of the fixed groove (26), and the side of the guide block (27) away from the fixed block (25) is fixedly connected to one end of the movable rod (28), and a spring is provided between the movable rod (28) and the fixed groove (26). At the same time, a fixing hole (29) is reserved on the output shaft of the cylinder (4) at the other end of the movable rod (28), and the movable rod (28) and the fixing hole (29) are snap-fitted.

6. The automatic feeding PCB board measuring instrument according to claim 1, characterized in that: One end of the fixed cylinder (15) is penetrated by a first air outlet pipe (16), and the first air outlet pipe (16) and the fixed cavity (17) are communicated with each other, and the fixed cavity (17) is arranged in the column (3). At the same time, the fixed cavity (17) is communicated with the connecting cavity (22) through the connecting pipe (18), and the connecting cavity (22) and the air outlet (23) are connected. The connecting cavity (22) is arranged inside the fixed plate (19), and the air outlet (23) is arranged on the top of the fixed plate (19).

7. The automatic feeding PCB board measuring instrument according to claim 6, characterized in that: The other end of the fixed cylinder (15) is fixedly connected to one end of the second air outlet pipe (21), and the other end of the second air outlet pipe (21) is communicated with the nozzle (20) through another connecting pipe (18), and the nozzle (20) is arranged at equal intervals on the inner side of the fixed plate (19). At the same time, a one-way valve is provided in both the first air outlet pipe (16) and the second air outlet pipe (21), and the connecting pipe (18) is spring-shaped.

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