Loading tray structure for testing

Abstract

The invention relates to the technical field of image measuring instruments, in particular to a loading tray structure for testing, which comprises a measuring instrument main body, and a movable platform is mounted on the top surface of the measuring instrument main body; a positioning structure is installed on the top face of the movable platform and comprises a fixing plate, the fixing plate is fixedly installed on the top face of the movable platform, a supporting plate is welded in the fixing plate, a sliding groove and an impurity discharging groove are formed in the bottom face of the fixing plate, and an exhaust pipe is fixedly connected to the left side wall of the fixing plate. A guide rod is fixedly installed at the front end of the bottom face of the fixing plate. According to the device, the positioning structure is installed on the moving platform, and the movable pipe capable of moving telescopically is arranged in the fixed plate, so that the movable pipe can extend out when a workpiece with a sunken bottom is measured, the workpiece on the top surface of the fixed plate is adsorbed and fixed through the movable pipe, and the influence of the shape of the bottom surface of the workpiece on the placement stability can be reduced; and stable measurement is ensured, and the practicability of the device is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of image measuring instruments, in particular to a loading tray structure for testing. Background Art

[0002] Automatic image measuring instruments are used to measure the image of objects. During the measurement process, the object is usually placed on a placement platform, which is moved on the X and Y axes in the horizontal direction, and the lifting equipment of the automatic image measuring instrument moves on the Z axis. When the size of the workpiece is smaller than the surface size of the placement platform, the workpiece is directly placed on the placement platform without the need for staff operation. If the size of the workpiece is larger than the surface size of the placement platform, a complete measurement cannot be performed, and the staff is required to manually move the workpiece and move the unmeasured part of the workpiece to the top of the placement platform. Such manual operation can easily cause the position of the workpiece to deviate, which can easily have an adverse effect on the measurement of the workpiece.

[0003] In this regard, China has applied for patent number: CN202011631996.8, which discloses an automatic image measuring instrument with an adjustment function, including an image measuring instrument body, a longitudinal linear motor is respectively installed on two opposite sides of the workbench of the image measuring instrument body, and a fixed plate is installed on each of the two longitudinal linear motors through a movable block. A plurality of parallel transverse linear motors are installed between the two fixed plates, so that the two fixed plates can move synchronously with the movable block along the direction of the longitudinal linear motor, and the top of the solenoid contacts the bottom of the pressure plate; a solenoid valve, a vacuum filter and a vacuum generator are respectively installed on the second mounting plate, and the vacuum generator is connected to the vacuum filter through an air pipe, and the vacuum filter is respectively connected to multiple carriers through the air pipe. This invention saves manpower while avoiding the deviation of the workpiece position, thereby improving the accuracy and efficiency of the automatic image measuring instrument in measuring workpieces.

[0004] The image measuring instrument can fix the workpiece by adsorbing it by setting a carrier. However, for some workpieces with concave bottom surfaces, since the bottom surface of the workpiece is supported on the top surface of the carrier, the carrier cannot effectively fit with the bottom surface of the workpiece, which will affect the fixation stability of the workpiece. This makes the use of the device have obvious limitations and cannot be flexibly adapted to the production needs of enterprises.

[0005] Therefore, in order to solve the above problem, a testing tray structure is proposed. Summary of the Invention

[0006] The purpose of the present invention is to provide a test loading tray structure to solve the problem proposed in the above background technology that the existing image measuring instrument can fix the workpiece by adsorbing it by setting a loading tray, but for some workpieces with recessed bottom surfaces, since the bottom surface of the workpiece is supported on the top surface of the loading tray, the loading tray cannot effectively fit with the bottom surface of the workpiece, which affects the fixing stability of the workpiece, resulting in obvious limitations in the use of the device and inability to flexibly adapt to the production needs of enterprises.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a test carrier tray structure, comprising: a measuring instrument body, a top surface of which is mounted a movable platform; The top surface of the mobile platform is provided with a positioning structure, and the positioning structure includes a fixing plate, the fixing plate is fixedly installed on the top surface of the mobile platform, the interior of the fixing plate is welded with a supporting plate, the bottom surface of the fixing plate is provided with a sliding groove and a miscellaneous groove, the left side wall of the fixing plate is fixedly connected to an exhaust pipe, the front end of the bottom surface of the fixing plate is fixedly installed with a guide rod, the rear end of the bottom surface of the fixing plate is movably installed with a threaded rod through a bearing, the right side wall of the fixing plate is fixedly installed with a motor, the top surface of the fixing plate is provided with a movable groove, the guide rod is slidably installed on the mobile plate, the top surface of the mobile plate is fixedly connected with a wedge block, and the top surface of the mobile plate is fixedly installed with an electromagnet; A movable structure is installed at the upper end of the interior of the positioning structure; A shielding structure is installed at the lower end inside the positioning structure.

[0008] Preferably, the length of the support plate is smaller than the inner length of the fixed plate, the upper end of the slide groove extends to the inside of the fixed plate, the two groups of fixed plates form a pair, and the debris removal groove is located between the two groups of fixed plates.

[0009] Preferably, the threaded rod passes through the movable plate and is threadedly connected to the movable plate, the output end of the motor is fixedly connected to the threaded rod, the wedge block is slidably installed inside the slide groove, and the electromagnet is aligned with the impurity discharge groove up and down.

[0010] Preferably, the movable structure includes a movable tube, which is movably installed inside the movable groove, and a guide groove is provided on the outer wall of the movable tube. A first sealing gasket and a second sealing gasket are bonded to the upper and lower ends of the movable tube, and a movable frame is provided on the outer side of the movable tube, and triangular grooves are provided on the bottom surfaces of both ends of the movable frame, and a first spring is fixedly connected to the top surface of the movable frame.

[0011] Preferably, a sealing gasket is bonded to the outer wall of the movable tube, and the outer wall of the sealing gasket is in contact with the inner wall of the movable groove, the top surface height of the first sealing gasket is lower than the top surface height of the fixed plate, and the bottom surface of the second sealing gasket is in contact with the inner wall of the fixed plate.

[0012] Preferably, the movable frame is slidably installed inside the guide groove, the first spring is sleeved on the outside of the movable tube, and one end of the first spring is fixedly connected to the outer wall of the movable tube.

[0013] Preferably, the shielding structure includes a shield plate, which is movably installed inside the impurity discharge trough through a rotating shaft, and the right end of the shield plate is fixedly connected to a coil spring. A movable cavity is opened on the bottom surface of the shield plate, and a metal plug is slidably installed inside the movable cavity, and the right end of the metal plug is fixedly connected to a second spring.

[0014] Preferably, the baffle is located on the lower side of the movable tube, one end of the coil spring is fixedly connected to the inner wall of the impurity removal groove, the left end of the metal plug is inserted into the inner wall of the impurity removal groove, and one end of the second spring is fixedly connected to the inner wall of the movable cavity.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the device of the present invention installs a positioning structure on a mobile platform and provides a retractable movable tube in the fixed plate, which can be extended when measuring a workpiece with a recessed bottom, so that the workpiece on the top surface of the fixed plate can be adsorbed and fixed by the movable tube, which can reduce the influence of the bottom surface shape of the workpiece on the placement stability, ensure the stable progress of the measurement work, and improve the practicality of the device.

[0016] A positioning structure, a movable structure and a shielding structure are provided. Before measurement, the exhaust pipe is connected to the exhaust source, and the air in the fixed plate can be extracted through the exhaust pipe, so that the internal pressure of the fixed plate is negative. At this time, the second sealing gasket at the bottom end of the movable pipe fits the inner wall of the fixed plate, so the inside of the movable tube is not affected by the internal air pressure of the fixed plate, and the internal air pressure of the movable tube can be kept the same; when measuring, the workpiece is placed on the top surface of the fixed plate. When the bottom surface of the workpiece is concave, a gap will exist between the bottom surface of the workpiece and the top surface of the fixed plate. At this time, the motor is started, and the motor drives the threaded rod to rotate. The threaded rod is threadedly connected to the movable plate. The rotation of the threaded rod drives the movable plate to move on the guide rod, and the movable plate drives the wedge block to move in the slide groove. The wedge block moves When the movable frame moves, the top end will contact the triangular groove and push the triangular groove, so that the movable frame rises on the outside of the movable tube, and the movable frame slides on the inside of the guide groove, which can keep the movement of the movable frame stable. When the movable frame moves, the first spring will drive the movable tube to move inside the movable groove, so that the upper end of the movable tube rises from the top surface of the fixed plate, and the second sealing gasket on the bottom of the movable tube will be separated from the inner wall of the fixed plate. At this time, the fixed plate and the interior of the movable tube are connected; when there is no workpiece on the upper side of the movable tube, the movable frame will move to the upper end of the slide groove under the action of the wedge block, so the internal air of the movable tube will also be sucked into the fixed plate, but the outside air will enter the inside of the movable tube from the upper end, so when the wedge block is separated from the triangular groove When the workpiece covers the upper side of the movable tube, the wedge block will drive the movable tube upward to approach the bottom surface of the workpiece when it moves, and the first sealing gasket will fit the workpiece. After the first sealing gasket fits the workpiece, the movable tube can no longer rise. At this time, the continued movement of the wedge block will push the movable frame to move outside the movable tube, and the movable frame will slide inside the guide groove and squeeze the first spring. At the same time, the upper end of the movable tube is sealed. Therefore, after the air in the movable tube is sucked into the fixed plate, the internal negative pressure of the movable tube is generated. The movable tube can cooperate with the first sealing gasket to be adsorbed on the bottom surface of the workpiece. When the wedge block is separated from the triangular groove, the movable frame is reset under the elastic action of the first spring, and the movable tube remains fixed inside the movable groove due to the negative pressure, so that the workpiece with a concave or flat bottom surface can be stably positioned; it can ensure that the movable tube outside the workpiece is separated from the inside of the fixed plate and does not share the negative pressure, thereby reducing energy consumption, while the inside of the movable tube on the lower side of the workpiece maintains negative pressure, thereby achieving precise fixation of the workpiece, and when the wedge block moves, it can push the movable tubes on the fixed plate in turn, so that the movable tubes rise from right to left or from left to right in turn and contact the workpiece, thereby avoiding that a large number of raised movable tubes will lift the workpiece and affect the stability of the workpiece;When the electromagnet contacts the shield plate, it can push the shield plate, so that the shield plate is rotated and stored in the discharge groove, and the metal plug block can be re-stuck in the inner wall of the discharge groove under the elastic action of the second spring, thereby realizing the sealing of the discharge groove and maintaining the sealing of the inner side of the fixed plate. ; BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic front view of the structure of the present invention; Figure 2 It is a schematic diagram of the explosion of the structure of the present invention; Figure 3 It is a bottom view schematic diagram of the positioning structure of the present invention; Figure 4 This is a schematic exploded view of the structure of the fixing plate and the wedge block of the present invention; Figure 5 Schematic side cross-sectional view of the structure of the fixing plate, support plate and chute of the present invention; Figure 6 It is an enlarged schematic diagram of the separation structure of the movable tube and the fixed plate of the present invention; Figure 7 Schematic diagram of the exploded side cross-sectional structure of the movable tube of the present invention; Figure 8 This is a schematic front cross-sectional view of the structure of the triangular groove and the wedge-shaped block of the present invention; Figure 9 It is a schematic front cross-sectional view of the structure of the fixed plate and the movable tube of the present invention; Figure 10 Schematic diagram of a top cross-section of the structure of the fixing plate of the present invention; Figure 11 This is a schematic diagram of an exploded upward view of the shielding structure of the present invention.

[0018] In the figure: 1. Measuring instrument body; 11. Moving platform; 2. Positioning structure; 21. Fixed plate; 22. Support plate; 23. Slide; 24. Discharge trough; 25. Exhaust pipe; 26. Guide rod; 27. Threaded rod; 28. Motor; 29. ​​Movable groove; 210. Moving plate; 211. Wedge block; 212. Electromagnet; 3. Movable structure; 31. Movable tube; 32. Guide groove; 33. First sealing gasket; 34. Second sealing gasket; 35. Moving frame; 36. Triangular groove; 37. First spring; 4. Shielding structure; 41. Shield; 42. Coil spring; 43. Movable cavity; 44. Metal plug; 45. Second spring. DETAILED DESCRIPTION

[0019] 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.

[0020] See also Figures 1-11 , an embodiment provided by the present invention: The products used in this application are directly available on the market, and their principles and connection methods are existing technologies well known to those skilled in the art, so they will not be described in detail here.

[0021] A test loading tray structure includes: a measuring instrument body 1, a top surface of which is mounted a movable platform 11; The top surface of the mobile platform 11 is equipped with a positioning structure 2, which includes a fixed plate 21, which is fixedly mounted on the top surface of the mobile platform 11. A support plate 22 is welded inside the fixed plate 21, and a slide groove 23 and a drainage groove 24 are provided on the bottom surface of the fixed plate 21. An exhaust pipe 25 is fixedly connected to the left wall of the fixed plate 21, a guide rod 26 is fixedly mounted on the front end of the bottom of the fixed plate 21, and a threaded rod 27 is movably mounted on the rear end of the bottom surface of the fixed plate 21 through a bearing. A motor 28 is fixedly mounted on the right wall of the fixed plate 21, and a top surface of the fixed plate 21 is provided. A movable plate 210 is slidably mounted on the movable slot 29 and the guide rod 26. A wedge block 211 is fixedly connected to the top surface of the movable plate 210. An electromagnet 212 is fixedly mounted on the top surface of the movable plate 210. By installing the positioning structure 2 on the movable platform 11 and providing a retractable movable tube 31 in the fixed plate 21, the movable tube 31 can be extended when measuring a workpiece with a concave bottom, so that the workpiece on the top surface of the fixed plate 21 can be adsorbed and fixed by the movable tube 31. This can reduce the influence of the bottom surface shape of the workpiece on the placement stability, ensure the stable performance of the measurement work, and improve the practicality of the device. The upper end of the positioning structure 2 is equipped with a movable structure 3; A shielding structure 4 is installed at the lower end of the interior of the positioning structure 2 .

[0022] Furthermore, the length of the support plate 22 is smaller than the inner length of the fixed plate 21, the upper end of the chute 23 extends to the inside of the fixed plate 21, the two groups of fixed plates 21 form a pair, and the impurity removal groove 24 is located between the two groups of fixed plates 21 of a pair. The setting of the support plate 22 will not affect the movement of air inside the fixed plate 21, and the movable tube 31 can be located between the two groups of fixed plates 21 so that the wedge block 211 can move inside the chute 23 on both sides of the movable tube 31.

[0023] Furthermore, the threaded rod 27 passes through the movable plate 210 and is threadedly connected to the movable plate 210. The output end of the motor 28 is fixedly connected to the threaded rod 27. The wedge block 211 is slidably installed inside the slide 23. The electromagnet 212 is aligned with the impurity removal groove 24 up and down. The motor 28 provides power for the rotation of the threaded rod 27. The rotation of the threaded rod 27 can drive the movable plate 210 to move on the guide rod 26. When the wedge block 211 moves inside the slide 23, it can contact the movable frame 35 in the movable groove 29.

[0024] Furthermore, the movable structure 3 includes a movable tube 31, which is movably installed inside the movable groove 29. A guide groove 32 is provided on the outer wall of the movable tube 31. A first sealing gasket 33 and a second sealing gasket 34 are bonded to the upper and lower ends of the movable tube 31. A movable frame 35 is provided on the outer side of the movable tube 31. Triangular grooves 36 are provided on the bottom surfaces of both ends of the movable frame 35. The top surface of the movable frame 35 is fixedly connected to a first spring 37. The movable tube 31 can extend from the top surface of the fixed plate 21 to stably position the workpiece with a concave and flat bottom surface, thereby improving the practicality of the device.

[0025] Furthermore, a sealing gasket is bonded to the outer wall of the movable tube 31, and the outer wall of the sealing gasket is in contact with the inner wall of the movable groove 29. The top surface height of the first sealing gasket 33 is lower than the top surface height of the fixed plate 21, and the bottom surface of the second sealing gasket 34 is in contact with the inner wall of the fixed plate 21. The setting of the sealing gasket can maintain the sealing inside the movable groove 29 to prevent outside air from entering and affecting the adsorption stability. When the workpiece is flat, the bottom end of the movable tube 31 can still be separated from the fixed plate 21 after it is raised, so that the air inside the movable tube 31 can be extracted, so that the fixed plate 21 and the movable tube 31 are under negative pressure, thereby realizing the positioning of the workpiece. When the second sealing gasket 34 is in contact with the fixed plate 21, the movable tube 31 is separated from the inside of the fixed plate 21.

[0026] Furthermore, the movable frame 35 is slidably installed inside the guide groove 32, and the first spring 37 is sleeved on the outside of the movable tube 31. One end of the first spring 37 is fixedly connected to the outer wall of the movable tube 31. The guide groove 32 is a movable guide limit for the movable frame 35. The first spring 37 provides power for the wedge block 211 to push the movable frame 35 to drive the movable tube 31 to move, so that the movable frame 35 can move a certain distance on the movable tube 31 to adapt to workpieces with different shapes of bottom surfaces.

[0027] Furthermore, the shielding structure 4 includes a shield plate 41, which is movably installed inside the impurity removal groove 24 through a rotating shaft. The right end of the shield plate 41 is fixedly connected to a coil spring 42. A movable cavity 43 is provided on the bottom surface of the shield plate 41. A metal plug 44 is slidably installed inside the movable cavity 43. The right end of the metal plug 44 is fixedly connected to a second spring 45. The shielding structure 4 can block the impurity removal groove 24 on the lower side of the movable tube 31 to maintain the sealing of the inner side of the fixed plate 21, and the movement of the movable plate 210 can cooperate with the electromagnet 212 to control the shielding structure 4.

[0028] Furthermore, the baffle 41 is located on the lower side of the movable tube 31, one end of the coil spring 42 is fixedly connected to the inner wall of the impurity discharge groove 24, the left end of the metal plug 44 is inserted into the inner wall of the impurity discharge groove 24, and one end of the second spring 45 is fixedly connected to the inner wall of the movable cavity 43. The baffle 41 can be fixed in the impurity discharge groove 24 through the metal plug 44, and the second spring 45 provides power for the metal plug 44 to be inserted into the impurity discharge groove 24.

[0029] Working Principle: Before measurement, connect the exhaust pipe 25 to the exhaust source, and the air in the fixed plate 21 can be extracted through the exhaust pipe 25, so that the internal pressure of the fixed plate 21 is negative. At this time, the second sealing gasket 34 at the bottom end of the movable tube 31 fits against the inner wall of the fixed plate 21. Therefore, the interior of the movable tube 31 is not affected by the internal pressure of the fixed plate 21, and the internal pressure of the movable tube 31 can be kept unchanged. During measurement, the workpiece is placed on the top surface of the fixed plate 21. When the bottom surface of the workpiece is concave, a gap will exist between the bottom surface of the workpiece and the top surface of the fixed plate 21. At this time, the motor 28 is started, and the motor 28 drives the threaded rod 27 to rotate. The threaded rod 27 is threadedly connected to the movable plate 210. The rotation of the threaded rod 27 drives the movable plate 210 to move on the guide rod 26. The movable plate 210 drives the wedge block 211 to move in the slide 23. When the wedge block 211 moves, the top end will contact the triangular groove 36 and Pushing the triangular groove 36 causes the movable frame 35 to rise outside the movable tube 31. The movable frame 35 slides inside the guide groove 32, which can ensure the stability of the movement of the movable frame 35. When the movable frame 35 moves, the first spring 37 drives the movable tube 31 to move inside the movable groove 29, so that the upper end of the movable tube 31 rises from the top surface of the fixed plate 21. The second sealing gasket 34 on the bottom surface of the movable tube 31 is separated from the inner wall of the fixed plate 21. At this time, the fixed plate 21 and the interior of the movable tube 31 are connected. When there is no workpiece on the upper side of the movable tube 31, the movable frame 35 will move to the upper end of the slide groove 23 under the action of the wedge block 211, so the internal air of the movable tube 31 will also be sucked into the fixed plate 21, but the outside air will enter the inner side of the movable tube 31 from the upper end. Therefore, when the wedge block 211 is separated from the triangular groove 36, the movable frame 35 will drop under the action of gravity, and the movable tube 31 will be re-received into the interior of the fixed plate 21, and then the second sealing gasket 34 will fit the inner wall of the fixed plate 21 again. At this time, the movable tube 31 will not be affected by the internal air pressure of the fixed plate 21. When the workpiece covers the upper side of the movable tube 31, the wedge block 211 will drive the movable tube 31 upward to approach the bottom surface of the workpiece when moving, and the first sealing gasket 33 will fit the workpiece The movable tube 31 is prevented from rising further by the first sealing gasket 33 after the first sealing gasket 33 is fitted with the workpiece. At this time, the continued movement of the wedge block 211 pushes the movable frame 35 to move outside the movable tube 31. The movable frame 35 slides inside the guide groove 32 and squeezes the first spring 37. At the same time, the upper end of the movable tube 31 is sealed. Therefore, after the air in the movable tube 31 is sucked into the interior of the fixed plate 21, the internal negative pressure of the movable tube 31 is generated. At this time, the movable tube 31 can cooperate with the first sealing gasket 33 to be adsorbed on the bottom surface of the workpiece. When the wedge block 211 is separated from the triangular groove 36, the movable frame 35 is reset under the elastic action of the first spring 37. The movable tube 31 remains fixed inside the movable groove 29 due to the negative pressure, which can stably position the workpiece with a concave or flat bottom surface. The movable tubes 31 on the outside of the workpiece can be separated from the interior of the fixed plate 21, so as not to share the negative pressure and reduce energy consumption. The negative pressure is maintained inside the movable tubes 31 on the bottom of the workpiece, so that the workpiece can be accurately fixed. In addition, when the wedge block 211 moves, it can push the movable tubes 31 on the fixed plate 21 in sequence, so that the movable tubes 31 rise from right to left or from left to right in sequence and contact the workpiece, thereby preventing a large number of movable tubes 31 from being raised and lifting the workpiece, thereby affecting the stability of the workpiece. The top surface of the fixed plate 21 is flat. When impurities fall on the top surface of the fixed plate 21, the impurities can be directly brushed away. The impurities can fall into the movable groove 29 and are collected on the top surface of the shielding plate 41 under the restriction of the movable tube 31. The motor 28 is started to control the movable plate 210 to move from the left end to the right on the guide rod 26, and the electromagnet 212 is started. When the electromagnet 212 moves from the lower side of the shielding plate 41, the electromagnet 212 will be magnetically connected with the metal plug 44, driving the metal plug 44 to be stored in the movable cavity 43, so that the metal plug 44 can be disconnected from the inner wall of the impurity removal groove 24, and then the shielding plate 41 can be released. When positioned inside the impurity discharge groove 24, the baffle 41 can be flipped downward under the elastic action of the coil spring 42, and the impurities dropped on the coil spring 42 can be scattered downward. After cleaning, the electromagnet 212 is turned off, and the motor 28 is started to drive the movable plate 210 to move from right to left on the guide rod 26. When the electromagnet 212 contacts the baffle 41, it can push the baffle 41 so that the baffle 41 is rotated and stored in the impurity discharge groove 24, and the metal plug 44 will be re-stuck in the inner wall of the impurity discharge groove 24 under the elastic action of the second spring 45, thereby sealing the impurity discharge groove 24 and maintaining the sealing of the inner side of the fixed plate 21.

[0030] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Any ordinary technician in this industry can smoothly implement the present invention as shown in the drawings and described above. However, any equivalent changes, modifications and evolutions made by technicians familiar with this profession without departing from the scope of the technical solution of the present invention using the technical content disclosed above are all equivalent embodiments of the present invention. At the same time, any equivalent changes, modifications and evolutions made to the above embodiments based on the essential technology of the present invention are still within the scope of protection of the technical solution of the present invention.

Claims

1. A test tray structure, comprising: A measuring instrument body (1), wherein a moving platform (11) is installed on the top surface of the measuring instrument body (1); Its characteristics are: The top surface of the mobile platform (11) is provided with a positioning structure (2), and the positioning structure (2) includes a fixing plate (21), the fixing plate (21) is fixedly installed on the top surface of the mobile platform (11), a support plate (22) is welded inside the fixing plate (21), a slide groove (23) and a debris removal groove (24) are provided on the bottom surface of the fixing plate (21), an exhaust pipe (25) is fixedly connected to the left side wall of the fixing plate (21), and a bottom front end of the fixing plate (21) is fixedly installed. A guide rod (26) is installed, a threaded rod (27) is movably installed on the rear end of the bottom surface of the fixed plate (21) through a bearing, a motor (28) is fixedly installed on the right side wall of the fixed plate (21), a movable groove (29) is opened on the top surface of the fixed plate (21), a movable plate (210) is slidably installed on the guide rod (26), a wedge block (211) is fixedly connected to the top surface of the movable plate (210), and an electromagnet (212) is fixedly installed on the top surface of the movable plate (210); A movable structure (3) is installed at the upper end of the interior of the positioning structure (2); A shielding structure (4) is installed at the lower end inside the positioning structure (2).

2. The test tray structure according to claim 1, wherein: The length of the support plate (22) is smaller than the inner length of the fixed plate (21), the upper end of the slide groove (23) extends to the inside of the fixed plate (21), the two groups of fixed plates (21) form a pair, and the impurity removal groove (24) is located between the two groups of fixed plates (21).

3. The test tray structure according to claim 1, wherein: The threaded rod (27) passes through the movable plate (210) and is threadedly connected to the movable plate (210). The output end of the motor (28) is fixedly connected to the threaded rod (27). The wedge block (211) is slidably installed inside the slide groove (23). The electromagnet (212) is aligned with the impurity discharge groove (24) in the upper and lower directions.

4. The test tray structure according to claim 1, wherein: The movable structure (3) comprises a movable tube (31), the movable tube (31) being movably mounted inside the movable groove (29), a guide groove (32) being provided on the outer wall of the movable tube (31), a first sealing gasket (33) and a second sealing gasket (34) being bonded to the upper and lower ends of the movable tube (31), a movable frame (35) being sleeved on the outer side of the movable tube (31), triangular grooves (36) being provided on the bottom surfaces of both ends of the movable frame (35), and a first spring (37) being fixedly connected to the top surface of the movable frame (35).

5. The test tray structure according to claim 4, characterized in that: A sealing gasket is bonded to the outer wall of the movable tube (31), and the outer wall of the sealing gasket is in contact with the inner wall of the movable groove (29). The top surface of the first sealing gasket (33) is lower than the top surface of the fixed plate (21), and the bottom surface of the second sealing gasket (34) is in contact with the inner wall of the fixed plate (21).

6. The test tray structure according to claim 4, characterized in that: The movable frame (35) is slidably mounted inside the guide groove (32), the first spring (37) is sleeved on the outside of the movable tube (31), and one end of the first spring (37) is fixedly connected to the outer wall of the movable tube (31).

7. The test tray structure according to claim 1, wherein: The shielding structure (4) includes a shielding plate (41), which is movably installed inside the impurity discharge groove (24) through a rotating shaft, and the right end of the shielding plate (41) is fixedly connected to a coil spring (42). The bottom surface of the shielding plate (41) is provided with a movable cavity (43), and a metal plug (44) is slidably installed inside the movable cavity (43), and the right end of the metal plug (44) is fixedly connected to a second spring (45).

8. The test carrier tray structure according to claim 7, characterized in that: The shield (41) is located at the lower side of the movable tube (31), one end of the coil spring (42) is fixedly connected to the inner wall of the impurity discharge groove (24), the left end of the metal plug (44) is inserted into the inner wall of the impurity discharge groove (24), and one end of the second spring (45) is fixedly connected to the inner wall of the movable chamber (43).

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