PCB measuring instrument

Abstract

The application provides a PCB measuring instrument, and particularly relates to the technical field of PCB visual measurement, and comprises a measuring instrument body, the top surface of the measuring instrument body is provided with a measuring table surface, a lifting component is installed on one side of the top surface of the measuring table surface, a visual camera is connected to the side of the lifting component close to the measuring table surface, a main control display is installed on the outer wall of one side of the measuring instrument body, when the measurement is completed, two shielding covers can be automatically reset and shielded outside the visual camera, when the visual camera is not used, the two shielding covers can effectively protect the visual camera, which can not only prevent dust and impurities in the air from adhering to the surface of the visual camera, but also prevent the visual camera from being damaged by accidental touching by personnel, on the one hand, the visual camera can have clear and stable shooting measurement effect, and the accuracy of the measurement data can be ensured, on the other hand, the service life and safety of the visual camera can be improved.

Description

TECHNICAL FIELD

[0001] The application provides a PCB measuring instrument, and particularly relates to the technical field of PCB visual measurement. BACKGROUND

[0002] Currently, the measuring instruments commonly used for PCBs include automatic and manual line width measuring instruments. Although the automatic line width measuring instrument can realize automatic measurement processing, the degree of human controllability is low, leading to poor flexibility of measurement operation, and the instrument cannot be applied to the measurement of some special PCBs. In most PCB measurement processes, manual measuring instruments are still used for manual measurement by measurement personnel.

[0003] A manual line width measuring instrument is disclosed in the authorized announcement CN217276024U, which comprises a cabinet, a workbench arranged on the upper surface of the cabinet, a lifting adjusting device arranged on the workbench, and an imaging device fixedly arranged on the lifting end of the lifting adjusting device. The lifting adjusting device drives the imaging device to adjust the lifting. The imaging device comprises a camera assembly fixedly arranged on the lifting end of the lifting adjusting device and a light source assembly arranged at the bottom of the camera assembly through a light source support frame and provided with a plurality of observation windows in the circumferential direction of the light source support frame. Compared with the prior art, the manual line width measuring instrument can improve the efficiency and accuracy of detection, and facilitate manual observation of whether the measured object is placed directly below the imaging device, thereby improving the accuracy of detection.

[0004] Although the above measuring instrument can improve the accuracy of detection, it still has technical limitations in actual use.

[0005] In the prior art, whether it is an automatic or manual measuring instrument, the core component for measurement, namely the visual camera (i.e., the camera assembly) in the PCB measuring instrument, lacks protection. In the actual measurement work of the PCB, due to uncontrollable external environmental factors, some dust and impurities floating in the air will inevitably adhere to the visual camera. Especially after the measurement is completed, the visual camera lacks targeted protection measures, so that dust and impurities adhere to the surface of the visual camera, which not only increases the workload of manual cleaning, but also affects the subsequent measurement effect of the visual camera and the accuracy of the PCB measurement data.

[0006] Therefore, the application provides a PCB measuring instrument to make up for and improve the shortcomings of the prior art. SUMMARY

[0007] In view of the defects of the prior art, the application provides a PCB measuring instrument, which can effectively solve the related technical problems proposed in the background art.

[0008] To achieve the above object, the present application is realized by the following technical solutions:

[0009] The application discloses a PCB measuring instrument, which comprises a measuring instrument body, a measuring table top is arranged on the top surface of the measuring instrument body, a lifting component is installed on one side of the top surface of the measuring table top, a visual camera is connected to the side of the lifting component close to the measuring table top, a main control display is installed on the outer wall of one side of the measuring instrument body, a positive protection mechanism is arranged on the measuring table top, and the positive protection mechanism comprises a back plate fixedly connected to the side of the measuring table top close to the lifting component; two double-slot grooves are symmetrically arranged on the top of the back plate, a sliding rod is slidably connected to the inside of each of the two double-slot grooves, a shielding cover is fixedly connected to the side of each of the two sliding rods away from the back plate, each of the two shielding covers is a one-half cavity cylindrical structure, an electric sliding rail is fixedly installed on the side of the back plate away from the lifting component, a sliding block is slidably connected to the electric sliding rail, the top outer wall of one of the sliding rods and the sliding block is fixedly connected, a rack one is fixedly connected to the bottom of the sliding block, a rack two is fixedly connected to the lower side of the end of the other sliding rod close to the rack one, a reversing gear is rotatably connected to the outer wall of the side of the measuring instrument body close to the rack one and the rack two, and the rack one, the rack two and the reversing gear are in meshing connection.

[0010] Preferably, the measuring table top is made of marble and its upper surface is smooth.

[0011] Preferably, the two shielding covers are made of acrylic material, and a sealing rubber strip is arranged on the side of each of the two shielding covers close to each other.

[0012] A drying assembly is arranged on one of the shielding covers to ensure that the inside of the shielding cover is dry.

[0013] Preferably, the drying assembly comprises an arc-shaped plate tightly inserted into the bottom side of one of the shielding covers, a disc box is fixedly connected to the inner side of the arc-shaped plate, a hole is arranged on one of the shielding covers for the disc box to horizontally pass through, and the disc box is composed of a box body and a box cover, and a plurality of circular arc grooves are uniformly arranged on the box cover in a radial distribution.

[0014] Preferably, the box cover and the box body are magnetically attracted and inserted into each other.

[0015] As preferred, the slide rod and the shielding cover are provided with a processing assembly, the processing assembly comprises an air pump fixedly installed on one of the slide rods, a suction pipe is in communication with the suction end of the air pump, one of the shielding covers is fixedly connected with a support pipe near one side of the bottom of the shielding cover, the support pipe and the suction pipe are in communication with each other, one end of the support pipe penetrates through the shielding cover and extends into the shielding cover, a cavity ring is in communication with one end of the support pipe in the shielding cover, and a plurality of air inlet pipes are uniformly arranged on the cavity ring in a ring shape.

[0016] As preferred, the cavity ring and the air inlet pipe are located directly below the visual camera.

[0017] As preferred, the measuring instrument body and the two slide rods are provided with a follow-up wiping mechanism, the follow-up wiping mechanism comprises two hanging rods fixedly connected to the bottoms of the two slide rods, the lower ends of the two hanging rods are fixedly connected with flat plates, the bottom surfaces of the flat plates are provided with wiping cloths, the flat plates are attached to the upper surfaces of the measuring table through the wiping cloths on the bottom surfaces, the outer walls on both sides of the measuring instrument body are fixedly connected with through grooves in a symmetrical manner, and the bottoms of the through grooves are slidably provided with sliding drawers, the interiors of the through grooves and the sliding drawers are in communication, and the positions of the through grooves and the sliding drawers correspond to the final positions of the corresponding wiping cloths after movement.

[0018] As preferred, the bottom surfaces of the flat plates are provided with magic tapes, and the wiping cloths are attached to the magic tapes on the bottom surfaces of the flat plates.

[0019] As preferred, the side of the sliding drawer away from the back plate is fixedly provided with a protruding block, the top of the protruding block is provided with a tab, and the tab is magnetically attracted to the outer wall of the through groove.

[0020] Compared with the known prior art, the technical scheme provided by the present application has the following beneficial effects:

[0021] The PCB measuring instrument is provided with shielding covers and electric slide rails, when the measuring personnel need to use the visual camera for measurement, the visual camera can be automatically exposed, after measurement, the two shielding covers can be automatically reset to shield the outside of the visual camera, when the visual camera is not used, the two shielding covers can effectively protect the visual camera, which can prevent dust and impurities from adhering to the surface of the visual camera, and prevent the visual camera from being accidentally touched and damaged, on the one hand, the visual camera can have clear and stable shooting measurement effect, and the accuracy of the measurement data can be ensured, on the other hand, the service life and safety of the visual camera can be improved.

[0022] The several desiccant particles placed in the disc box can timely absorb the moisture in the air after the two shielding covers form the peripheral protection for the visual camera, so that the moisture intrusion into the visual camera is avoided, and the damage of the visual camera is avoided, and the protection of the visual camera is further improved; and the desiccant in the disc box can be conveniently replaced by personnel after saturation, so that the continuity of the moisture absorption effect is ensured.

[0023] The dust and impurities on the surface of the visual camera are further removed by the negative pressure suction mode after the visual camera is used, so that the dust is automatically removed without manual contact, the measurement and shooting effect of the subsequent use of the visual camera is ensured, the manual contact for removing the dust is avoided, the lens surface of the visual camera is not abraded, the clear shooting effect of the visual camera is further ensured, and the heat generated during the use of the visual camera is also removed by the suction mode, so that the heat is prevented from accumulating in the shielding cover.

[0024] The impurities are removed by the translation of the wiping cloth on the upper surface of the measuring table, so that the cleanliness of the surface of the measuring table is ensured, the horizontal degree of the PCB during placement is not affected, the measurement accuracy is ensured, and the damage of the PCB caused by the contact and friction of the impurities is avoided, so that the damage rate of the PCB in the measurement link is reduced. DETAILED DESCRIPTION

[0025] Figure 1 It is a front perspective view of the present application;

[0026] Figure 2 It is another perspective view of the present application;

[0027] Figure 3 It is a partial perspective view of the related components at the back plate of the present application;

[0028] Figure 4 It is a partial perspective view of the related components of one of the shielding covers of the present application in a cut state;

[0029] Figure 5 It is a partial perspective view of the related components of one of the shielding covers and the visual camera of the present application in a cut state;

[0030] Figure 6 It is a partial exploded perspective view of the related components of the shielding cover of the present application;

[0031] Figure 7 It is a partial perspective view of the related components of the hanging rod of the present application;

[0032] Figure 8 It is a partial perspective view of the related components of the flat plate and the wiping cloth of the present application;

[0033] Figure 9 This is a partial three-dimensional structural diagram of the through groove and related components of the sliding drawer of the present invention;

[0034] Figure 10 This is a three-dimensional structural diagram of the relevant components of the present invention in the separated state of the through groove and the sliding drawer.

[0035] The labels in the diagram represent:

[0036] 1. Measuring instrument body; 11. Measuring table; 12. Lifting components; 13. Vision camera; 14. Main control display;

[0037] Active protection mechanism: 21. Backplate; 22. Twin slots; 23. Slide bar; 24. Shield; 25. Electric slide rail; 26. Slider; 27. Rack 1; 28. Rack 2; 29. ​​Reversing gear;

[0038] Drying components: 241, curved plate; 242, disc box;

[0039] Processing components: 31. Air pump; 32. Suction tube; 33. Support tube; 34. Cavity ring; 35. Air inlet tube;

[0040] Follow-up wiping mechanism: 41. Hanging rod; 42. Flat plate; 43. Wiping cloth; 44. Through groove; 45. Sliding drawer; 451. Protrusion. Detailed Implementation

[0041] The present invention will be further described below with reference to embodiments.

[0042] Example 1:

[0043] like Figures 1 to 6 As shown, a PCB measuring instrument includes a measuring instrument body 1. A measuring platform 11 is provided on the top surface of the measuring instrument body 1. The measuring platform 11 is made entirely of marble, and its upper surface is smoothed to ensure flatness and reduce wear on the PCB board being measured. A lifting component 12 is installed on one side of the top surface of the measuring platform 11. A vision camera 13 is connected to the side of the lifting component 12 closest to the measuring platform 11. The lifting component 12 is used to adjust the vertical height of the vision camera 13. A main control display 14 is installed on the outer wall of one side of the measuring instrument body 1. The measuring instrument body 1, measuring platform 11, lifting component 12, vision camera 13, and main control display 14 are all major components of existing PCB measuring instruments; their detailed connections and principles are not elaborated here.

[0044] The measuring table 11 is provided with a positive protection mechanism, and the positive protection mechanism comprises a back plate 21 fixedly connected to one side of the measuring table 11 close to the lifting component 12, two double-slot grooves 22 are symmetrically formed on the top of the back plate 21, two sliding rods 23 are respectively and slidably connected to the inside of the two double-slot grooves 22, and the initial positions of the two sliding rods 23 are located on the side close to each other. The side, away from the back plate 21, of each of the two sliding rods 23 is fixedly connected with a shielding cover 24, and each of the two shielding covers 24 is a half-cavity cylindrical structure, that is, the two shielding covers 24 can form a complete cavity cylinder in the closed state, and the visual camera 13 is located in the inside center of the two shielding covers 24 in the initial position, and the top of each of the two shielding covers 24 is provided with a through hole which can be attached to the outer surface of the visual camera 13. The two shielding covers 24 are made of acrylic material, and the side, close to each other, of the two shielding covers 24 is provided with a sealing rubber strip to improve the sealing performance of the two shielding covers 24 after being closed. The side, away from the lifting component 12, of the back plate 21 is fixedly installed with an electric sliding rail 25, and the electric sliding rail 25 is controlled by an external controller. A sliding block 26 is slidably connected to the electric sliding rail 25, one end of one of the two sliding rods 23 is fixedly connected to the top outer wall of the sliding block 26, the bottom of the sliding block 26 is fixedly connected with a rack one 27, the other sliding rod 23 is fixedly connected with a rack two 28 below the end close to the rack one 27, and the outer wall of the side, close to the rack one 27 and the rack two 28, of the measuring instrument body 1 is rotatably connected with a reversing gear 29, and the rack one 27, the rack two 28 and the reversing gear 29 are in meshing connection.

[0045] Further, as shown in Figure 5 、 Figure 6 One of the shielding covers 24 is provided with a drying assembly for ensuring the dryness inside the shielding cover 24, and the drying assembly comprises an arc-shaped plate 241 tightly inserted into one side of the bottom of the shielding cover 24, the inner side of the arc-shaped plate 241 is fixedly connected with a disc box 242, and drying agent particles are placed in the inside of the disc box 242. One of the shielding covers 24 is provided with a hole for the disc box 242 to horizontally pass through, and the disc box 242 is composed of a box body and a box cover, and a plurality of circular arc grooves are uniformly formed on the box cover. The box cover and the box body are magnetically inserted and matched, that is, the bottom surface of the box cover can be inserted into the top surface of the box cover, and the inserted part is connected by a magnet. When the drying agent particles in the disc box 242 are saturated, the worker can hold the arc-shaped plate 241 to take out the disc box 242 from the shielding cover 24, open the cover of the disc box 242, pour out the used drying agent particles, and then put in new drying agent. The connection between the box cover and the box body adopts a magnetic connection mode, which is convenient for the worker to manually replace the drying agent particles and improves the practicability of the device.

[0046] In use: before measurement, the measurer starts the electric slide rail 25 through the external controller to promote the sliding block 26 to drive a slide rod 23 fixedly connected therewith to gradually translate away from the reversing gear 29 until the sliding block 26 moves to the final position. With the translation of the slide rod 23, a shielding cover 24 fixedly connected therewith will be synchronously displaced, i.e. the shielding cover 24 is gradually away from the visual camera 13. With the translation of the sliding block 26, the rack one 27 will also move synchronously, and the translation of the rack one 27 will promote the reversing gear 29 to rotate, so that the rack two 28 drives the slide rod 23 fixedly connected therewith to synchronously displace, and the translation direction of the slide rod 23 is opposite to that of the previous slide rod 23, so that the shielding cover 24 fixedly connected with the slide rod 23 is also gradually away from the visual camera 13. In this way, with the translation of the sliding block 26, the two shielding covers 24 will be gradually away from the visual camera 13 in opposite directions under the cooperation of the reversing gear 29 and the rack two 28 and the rack one 27, until the visual camera 13 is exposed after the movement stops.

[0047] Subsequently, the measurer manually places the PCB to be measured horizontally on the upper surface of the measuring table top 11 and starts the visual camera 13. After the visual camera 13 is started, the measurer manually translates the PCB on the upper surface of the measuring table top 11 to realize the measurement of the line width and length of the PCB. The measured data can be intuitively presented to the measurer through the main control display 14. Thus, the measurement of the PCB is completed.

[0048] After the measurement is completed, the measurer manually takes away the PCB from the upper surface of the measuring table top 11. Then, the electric slide rail 25 is controlled through the external controller to promote the sliding block 26 to reversely translate along the track of the electric slide rail 25 to reset. After the electric slide rail 25 is translated to reset, the two shielding covers 24 will also synchronously reset, i.e. the two shielding covers 24 shield the visual camera 13 again. Therefore, through the cooperation of the shielding covers 24, the electric slide rail 25 and other components, when the measurer needs to use the visual camera 13 for measurement, the visual camera 13 can be automatically exposed, and after the measurement is completed, the two shielding covers 24 can automatically reset to shield the visual camera 13, so that the visual camera 13 is effectively protected by the two shielding covers 24 when not in use, which not only prevents dust and impurities in the external environment from adhering to the surface of the visual camera 13, but also prevents the visual camera 13 from being accidentally touched and damaged, on the one hand, to ensure that the visual camera 13 can have a clear and stable shooting measurement effect and ensure the accuracy of the measurement data, and on the other hand, to improve the service life and safety of the visual camera 13.

[0049] In addition, when the two shielding covers 24 form a peripheral protection for the visual camera 13, the dry agent particles placed inside the disc box 242 can timely absorb the moisture in the air to avoid the moisture from invading the visual camera 13 and causing damage to the visual camera 13, thereby further improving the protection of the visual camera 13. After the dry agent inside the disc box 242 is saturated, it can be conveniently replaced by personnel to ensure the persistence of the moisture absorption effect.

[0050] Embodiment two:

[0051] As shown in Figure 1 , Figure 5 , Figure 6 The above-mentioned PCB measuring instrument further comprises a processing assembly arranged on the slide rods 23 and the shielding covers 24, the processing assembly comprising an air pump 31 fixedly installed on one of the slide rods 23, the air pump 31 being controlled by an external controller, and a dust collection bag being connected to an air outlet end of the air pump 31 for collecting dust and impurities to avoid the dust and impurities from falling on the table top. A suction pipe 32 is connected to a suction end of the air pump 31, and an electromagnetic valve is installed at a position where the suction pipe 32 is connected to the suction end of the air pump 31. One of the shielding covers 24 is fixedly connected with a support pipe 33 near one side of the bottom of the shielding cover 24, the support pipe 33 being in communication with the suction pipe 32, one end of the support pipe 33 penetrating through the shielding cover 24 and extending into the shielding cover 24, and a cavity ring 34 being connected to one end of the support pipe 33 inside the shielding cover 24, a plurality of air inlet pipes 35 being evenly connected to the cavity ring 34 in a ring shape. The cavity ring 34 and the air inlet pipes 35 are located directly below the visual camera 13.

[0052] In use: considering that dust and impurities in the external environment will also adhere to the surface of the visual camera 13 during the measurement and use of the visual camera 13. Therefore, after the two shielding covers 24 are reset, the measurement personnel can start the air pump 31 through the external controller, and a negative pressure area is formed in the inside of the shielding cover 24 through the suction pipe 32, the support pipe 33, the cavity ring 34 and the air inlet pipes 35, so as to suck away the dust and impurities adhering to the surface of the visual camera 13, especially the lens surface of the visual camera 13, and make the dust and impurities enter the dust collection bag. After the air pump 31 operates for a period of time, the air pump 31 can be turned off. Therefore, through the cooperation of the air pump 31 and the air inlet pipes 35 and other components, after the visual camera 13 is used, the dust and impurities on the surface of the visual camera 13 are further removed through negative pressure suction in a way of automatically removing the dust without manual contact, which can not only ensure the measurement and shooting effect of the visual camera 13 in subsequent use, but also avoid the manual contact for removing the dust, thereby preventing the lens surface of the visual camera 13 from being damaged, further ensuring the clear shooting effect of the visual camera 13, and the suction method can also take away the heat generated during the use of the visual camera 13 to prevent the heat from accumulating in the inside of the shielding cover 24.

[0053] Embodiment three:

[0054] As Figure 1 , Figures 7 to 10 As shown in the above two slide rod 23 drive two shielding cover 24 away from the process of visual camera 13, prompting the wiping cloth 43 along the measurement table 11 on the surface of the translation, the impurities attached to the measurement table 11 on the surface of the measurement table 11 on the surface of the gradually push, until the slider 26 and shielding cover 24 movement stops, at this time the wiping cloth 43 is located in the through slot 44 above, so that the impurities are automatically sent into the through slot 44 inside, and through the through slot 44 into the sliding drawer 45 inside the automatic collection. In addition, the measurement personnel after the measurement is completed, can hand the convex block 451 from the through slot 44 at the bottom of the horizontal sliding drawer 45, that is, the impurities in the sliding drawer 45 inside the dumping processing.

[0055] In use: in the above two slide rod 23 drive two shielding cover 24 away from the process of visual camera 13, prompting the wiping cloth 43 along the measurement table 11 on the surface of the translation, the impurities attached to the measurement table 11 on the surface of the measurement table 11 on the surface of the gradually push, until the slider 26 and shielding cover 24 movement stops, at this time the wiping cloth 43 is located in the through slot 44 above, so that the impurities are automatically sent into the through slot 44 inside, and through the through slot 44 into the sliding drawer 45 inside the automatic collection. In addition, the measurement personnel after the measurement is completed, can hand the convex block 451 from the through slot 44 at the bottom of the horizontal sliding drawer 45, that is, the impurities in the sliding drawer 45 inside the dumping processing.

[0056] Therefore, the use of wiping cloth 43 along the measurement table 11 on the surface of the translation, the impurities away, to ensure the cleanliness of the measurement table 11 on the surface, not only to avoid the influence of the impurities when the PCB placed level, to ensure the measurement accuracy, but also can avoid the impurities and PCB contact friction and lead to the PCB damage, to reduce the damage rate of PCB measurement link.

[0057] The above examples are only used to illustrate the technical solutions of the present application, but not to limit the present application; although the present application has been described in detail with reference to the foregoing examples, those ordinarily skilled in the art should understand: the technical solutions recorded in the foregoing examples can still be modified, or some technical features can be replaced equivalently; and these modifications or replacements will not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A PCB measuring instrument, comprising a measuring instrument body (1), the top surface of the measuring instrument body (1) is provided with a measuring table surface (11), one side of the top surface of the measuring table surface (11) is provided with a lifting component (12), the lifting component (12) is connected with a visual camera (13) near one side of the measuring table surface (11), and one side outer wall of the measuring instrument body (1) is provided with a main control display (14), characterized in that, The measuring platform (11) is provided with an active protection mechanism, and the active protection mechanism comprises a back plate (21) fixedly connected to the measuring platform (11) on the side close to the lifting component (12), two double-slot grooves (22) are symmetrically formed in the top of the back plate (21), two sliding rods (23) are slidably connected in the double-slot grooves (22), respectively, shielding covers (24) are fixedly connected to the sides of the two sliding rods (23) away from the back plate (21), the two shielding covers (24) are both half-cavity cylindrical structures, an electric sliding rail (25) is fixedly installed on the side of the back plate (21) away from the lifting component (12), a sliding block (26) is slidably connected to the electric sliding rail (25), one of the sliding rods (23) is fixedly connected to the top outer wall of the sliding block (26), a rack one (27) is fixedly connected to the bottom of the sliding block (26), a rack two (28) is fixedly connected to the lower side of the other sliding rod (23) close to one end of the rack one (27), a reversing gear (29) is rotatably connected to the outer wall of the measuring instrument body (1) on the side close to the rack one (27) and the rack two (28), and the rack one (27), the rack two (28) and the reversing gear (29) are in meshing connection; The two shielding covers (24) are made of acrylic material, and sealing rubber strips are arranged on the sides of the two shielding covers (24) close to each other; One of the shielding covers (24) is provided with a drying assembly for ensuring the dryness of the inside of the shielding cover (24); The drying assembly comprises an arc-shaped plate (241) tightly inserted into one side of the bottom of the shielding cover (24), a disc box (242) is fixedly connected to the inner side of the arc-shaped plate (241), a hole is formed in the shielding cover (24) for the disc box (242) to pass through horizontally, and the disc box (242) is composed of a box body and a box cover, and a plurality of circular arc grooves are uniformly formed in the box cover in a radial distribution manner; A treatment assembly is arranged on the sliding rod (23) and the shielding cover (24), the treatment assembly comprises a gas pump (31) fixedly installed on one of the sliding rods (23), a suction pipe (32) is in communication with the suction end of the gas pump (31), a support pipe (33) is fixedly connected to one side of the shielding cover (24) close to the bottom of the shielding cover (24), the support pipe (33) and the suction pipe (32) are in communication with each other, one end of the support pipe (33) penetrates through the shielding cover (24) and extends into the inside of the shielding cover (24), a cavity ring (34) is in communication with one end of the support pipe (33) in the inside of the shielding cover (24), and a plurality of air inlet pipes (35) are uniformly and in communication with the cavity ring (34) in a ring-shaped distribution manner. The measuring instrument body (1) and the two slide rods (23) are provided with a follow-up wiping mechanism, the follow-up wiping mechanism comprises two hangers (41) fixedly connected to the bottom of the two slide rods (23), the lower end of each of the two hangers (41) is fixedly connected with a flat plate (42), the bottom surface of the flat plate (42) is provided with a wiping cloth (43), the flat plate (42) is attached to the upper surface of the measuring table (11) through the wiping cloth (43) on the bottom surface, the outer walls of the measuring instrument body (1) are symmetrically fixedly connected with through grooves (44), the bottom of each of the through grooves (44) is slidably provided with a sliding drawer (45), the through groove (44) is in communication with the inside of the sliding drawer (45), and the positions of the through groove (44) and the sliding drawer (45) correspond to the final positions of the corresponding wiping cloths (43) after movement. The measuring table (11) is made of marble, and the upper surface thereof is smooth.

2. The PCB gauge of claim 1, wherein, The box cover and the box body are magnetically connected.

3. The PCB gauge of claim 1, wherein, The cavity ring (34) and the air inlet pipe (35) are located directly below the visual camera (13).

4. The PCB gauge of claim 1, wherein, The bottom surface of the flat plate (42) is provided with a magic tape, and the wiping cloth (43) is attached to the magic tape on the bottom surface of the flat plate (42).

5. The PCB gauge of claim 1, wherein, The side, away from the back plate (21), of the sliding drawer (45) is fixedly provided with a protruding block (451), the top of the protruding block (451) is provided with a tab, and the tab is magnetically attached to the outer wall of the through groove (44).

Images