Touch screen surface defect detection equipment

Abstract

The invention belongs to the technical field of detection equipment, and discloses touch screen surface defect detection equipment which is technically characterized by comprising a workbench, vertical plates are fixedly mounted on the surface of the workbench, stand columns are slidably mounted on the two vertical plates, a detection table is fixedly mounted on the surface of the workbench, and a placement groove is formed in the surface of the detection table; a bearing rod is rotatably arranged between the two sets of stand columns, a coating pad is fixedly installed on the surface of the bearing rod, a wiping plate is fixedly installed on the surface of the bearing plate, a positioning mechanism is arranged between the two sets of vertical plates, and the positioning mechanism comprises a translation assembly, a lifting assembly and an overturning assembly. An automatic feeding assembly matched with the coating pad is arranged on the surface of the workbench, the translation assembly, the lifting assembly and the overturning assembly are arranged to be matched with one another, the relative position of the coating pad and the wiping plate can be conveniently and rapidly adjusted, the coating process and the wiping process of printing ink on the surface of the touch screen can be automatically switched, and the automation degree is high. And the detection efficiency of the touch screen is effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, in particular to a touch screen surface defect detection device. Background Art

[0002] A touch screen is an inductive liquid crystal display device that can receive input signals such as contacts. When a graphic button on the screen is touched, the tactile feedback system on the screen can drive various connection devices according to a pre-programmed program. It can be used to replace mechanical button panels and create vivid audio and video effects through the LCD display. As the latest computer input device, the touch screen is a simple, convenient and natural way of human-computer interaction.

[0003] After the touch screen is produced, it needs to be sampled and tested to ensure that the surface of the touch screen is smooth and free of scratches.

[0004] Currently, scratch detection is mainly performed by coating ink on the touch screen surface. However, this existing detection method cannot automatically switch between the ink coating and wiping processes when in use, has a low degree of automation, and cannot automatically and continuously add ink at equal intervals. As a result, it is impossible to perform coating inspection on batches of touch screens in sequence, resulting in low overall detection efficiency. Summary of the Invention

[0005] The object of the present invention is to provide a touch screen surface defect detection device to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A touch screen surface defect detection device includes a workbench, two groups of relatively distributed vertical plates are fixedly installed on the surface of the workbench, and columns are respectively slidably installed on the opposite side walls of the two groups of vertical plates in the horizontal direction. A detection platform is fixedly installed on the surface of the workbench, and a placement groove is opened on the surface of the detection platform. A bearing rod is rotatably arranged between the two groups of columns, a coating pad is fixedly installed on the surface of the bearing rod, and a wiping plate distributed opposite to the coating pad is fixedly installed on the surface of the bearing plate. A positioning mechanism that cooperates with the bearing rod is provided between the two groups of vertical plates, and the positioning mechanism includes a translation component, a lifting component and a flip component. The translation component is located on the surface of the workbench and is rotated with the bearing rod. The two columns are connected, and the translation assembly is used to control the two groups of columns to move synchronously in the horizontal direction at the side walls of the vertical plates. The lifting assembly is located on the surface of the column and is connected to the load-bearing rod. When the column drives the load-bearing rod to move in the horizontal direction, the lifting assembly is used to synchronously adjust the height of the load-bearing rod in the vertical direction. The flipping assembly is connected to the load-bearing rod. When the column drives the load-bearing rod to move in the horizontal direction, the flipping assembly is used to control the load-bearing rod to rotate one hundred and eighty degrees around its own axis to thereby adjust the relative position of the coating pad and the wiping plate. The workbench surface is provided with an automatic loading assembly that cooperates with the coating pad. The automatic loading assembly is used to add ink to the surface of the coating pad at equal time intervals.

[0008] As a further solution of the present invention: the translation assembly includes two groups of relatively distributed baffles fixedly installed on the surface of the workbench, two groups of relatively distributed threaded rods are rotatably installed between the two groups of baffles, the threaded rods are threadedly connected to the columns, and synchronous gear plates are fixedly installed on the surface of the threaded rods. The two groups of synchronous gear plates are commonly connected to a synchronous belt, and one end of one group of threaded rods extends to the outside of the baffle and is connected to a motor.

[0009] As a further solution of the present invention: the lifting assembly includes a vertical groove opened on the surface of the column, a sliding block is slidably installed in the vertical groove along the vertical direction, both ends of the load-bearing rod are rotatably connected to the sliding block, and guide grooves are respectively opened on the opposite side walls of the two groups of vertical plates, and the two ends of the guide grooves are respectively set as broken line structures, and the side walls of the sliding block are provided with guide rods extending into the guide grooves.

[0010] As a further solution of the present invention: the flip assembly includes a fixed gear disk fixedly installed on the surface of the bearing rod, a bracket fixedly installed on the side wall of the vertical plate, a rack fixedly installed on the end of the bracket away from the vertical plate, the rack engages with the fixed gear disk, two groups of relatively distributed first magnetic blocks are fixedly installed on the side wall of the fixed gear disk, and a second magnetic block that cooperates with the first magnetic block is fixedly installed on the side wall of the sliding block.

[0011] As a further solution of the present invention: the automatic loading assembly includes a storage box fixedly installed on the surface of the workbench, an opening is provided on the surface of the storage box, a rotating column is rotatably installed in the storage box, a cylindrical suction pad is fixedly installed on the outside of the rotating column through a support rod, the suction pad extends through the opening to above the storage box, one end of the rotating column extends to the outside of the storage box and is connected to a one-way rotating part.

[0012] As a further solution of the present invention: the one-way rotating part includes a gear disk fixedly installed at one end of a rotating column extending outside the storage box, a limit plate that cooperates with the gear disk is rotatably installed on the side wall of the storage box, an extrusion spring connected to the limit plate is fixedly installed on the side wall of the storage box, and a block rod that fits with the limit plate is fixedly installed on the side wall of the storage box.

[0013] As a further solution of the present invention: the coating pad is made of sponge material, and the wiping plate is made of sponge or rubber material.

[0014] Compared with the existing technology, the beneficial effects of the present invention are: by setting a translation component, a lifting component and a flip component to cooperate with each other, the relative position of the coating pad and the wiping plate can be conveniently adjusted, and the coating and wiping processes of the ink on the touch screen surface can be automatically switched, thereby effectively improving the detection efficiency of the touch screen, and solving the current problem of being unable to automatically switch the coating and wiping processes of the ink and the low degree of automation.

[0015] By arranging an automatic feeding component and a one-way rotating part to cooperate with each other, ink can be automatically added to the bottom of the coating pad, and defects can be continuously detected on batches of touch screens. This solves the current problem of being unable to automatically add ink. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The figure is a schematic diagram of the three-dimensional structure of a touch screen surface defect detection device provided in an embodiment of the present invention.

[0017] Figure 2 This is a schematic diagram of the main structure of a touch screen surface defect detection device provided in an embodiment of the present invention.

[0018] Figure 3 The figure is a schematic diagram of a workbench and its connection structure in a touch screen surface defect detection device provided in an embodiment of the present invention.

[0019] Figure 4 for Figure 1 Schematic diagram of the enlarged structure of A in the figure.

[0020] Figure 5 for Figure 2 Schematic diagram of the enlarged structure of B.

[0021] Figure 6 The present invention provides a schematic diagram of a center column and its connection structure in a touch screen surface defect detection device provided in an embodiment of the present invention.

[0022] Figure 7 The figure is a schematic structural diagram of a one-way rotating part in a touch screen surface defect detection device provided in an embodiment of the present invention.

[0023] Among them: 1- workbench, 2- vertical plate, 21- column, 3- detection table, 31- placement slot, 4- load-bearing rod, 41- coating pad, 42- wiping plate, 5- positioning mechanism, 51- translation assembly, 511- baffle, 512- threaded rod, 513- synchronous gear disc, 514- synchronous belt, 515- motor, 52- lifting assembly, 521- vertical slot, 522- sliding block, 523- guide rod, 524- guide slot, 53- flip assembly, 531- fixed gear disc, 532- bracket, 533- rack, 534- first magnetic block, 535- second magnetic block, 6- automatic feeding assembly, 61- storage box, 62- rotating column, 63- suction pad, 7- one-way rotating part, 71- gear disc, 72- limit plate, 73- extrusion spring, 74- baffle rod. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0025] The specific implementation of the present invention is described in detail below with reference to specific embodiments.

[0026] like Figure 1 、 Figure 2 、 Figure 3As shown, it is a structural diagram of a touch screen surface defect detection device provided by an embodiment of the present invention, including a workbench 1, two groups of relatively distributed vertical plates 2 are fixedly installed on the surface of the workbench 1, and columns 21 are respectively slidably installed on the opposite side walls of the two groups of vertical plates 2 in the horizontal direction. A detection platform 3 is fixedly installed on the surface of the workbench 1, and a placement groove 31 is provided on the surface of the detection platform 3. A bearing rod 4 is rotatably arranged between the two groups of columns 21, and a coating pad 41 is fixedly installed on the surface of the bearing rod 4. A wiping plate 42 distributed opposite to the coating pad 41 is fixedly installed on the surface of the bearing plate 4. A positioning mechanism 5 that cooperates with the bearing rod 4 is provided between the two groups of vertical plates 2. The positioning mechanism 5 includes a translation component 51, a lifting component 52 and a flipping component 53. The translation component 51 is located at The surface of the workbench 1 is connected to the column 21, and the translation component 51 is used to control the two groups of columns 21 to move synchronously in the horizontal direction at the side wall of the vertical plate 2. The lifting component 52 is located on the surface of the column 21 and is connected to the load-bearing rod 4. When the column 21 drives the load-bearing rod 4 to move in the horizontal direction, the lifting component 52 is used to synchronously adjust the height of the load-bearing rod 4 in the vertical direction. The flipping component 53 is connected to the load-bearing rod 4. When the column 21 drives the load-bearing rod 4 to move in the horizontal direction, the flipping component 53 is used to control the load-bearing rod 4 to rotate one hundred and eighty degrees around its own axis and thereby adjust the relative position of the coating pad 41 and the wiping plate 42. The surface of the workbench 1 is provided with an automatic loading component 6 that cooperates with the coating pad 41. The automatic loading component 6 is used to add ink to the surface of the coating pad 41 at equal time intervals.

[0027] Initially, the supporting rod 41 is on one side of the workbench 1. At this time, the coating pad 41 is below the supporting rod 41. The automatic loading assembly 6 automatically adds an appropriate amount of ink to the bottom of the coating pad 41. The wiping plate 42 is above the supporting rod 41, and the touch screen to be tested is placed in the placement groove 31 on the surface of the testing platform 3. The translation assembly 51 pushes the column 21 to move horizontally at the side wall of the vertical plate 2. The two groups of columns 21 drive the supporting rod 4 to move synchronously in the horizontal direction. The supporting rod 4 drives the coating pad 41 and the wiping plate 42 to move synchronously. When the supporting rod 4 moves horizontally, the lifting assembly 52 controls the supporting rod 4 to move synchronously in the vertical direction and adjusts the height of the coating pad 41 so that the bottom end of the coating pad 41 is at the same height as the surface of the touch screen. At this time, the coating pad 41 can evenly apply ink to the surface of the touch screen. When the supporting rod 4 moves to the other end of the workbench 1, it flips over. The rotation assembly 53 controls the support rod 4 to rotate 180 degrees, and the support rod 4 drives the coating pad 41 and the wiping plate 42 to rotate synchronously. At this time, the wiping plate 42 rotates to the bottom of the support rod 4. The translation assembly 51 controls the column 21 to move in the opposite direction in the horizontal direction. The column 21 and the support rod 4 cooperate with each other, thereby driving the wiping plate 42 to move in the opposite direction synchronously. The wiping plate 42 can wipe the ink coated on the touch screen surface in all directions. When there are scratches on the touch screen surface, the ink is stored in the scratches, and the staff can easily check the scratches on the touch screen surface. After the support rod 4 moves to the end, the flip assembly 53 controls the coating pad 41 to rotate again to the bottom of the support rod 4. The automatic loading assembly 6 can add an appropriate amount of ink to the bottom of the coating pad 41 again to facilitate the inspection of the next group of touch screens.

[0028] like Figure 2 、 Figure 3 As shown, as a preferred embodiment of the present invention, the translation assembly 51 includes two groups of relatively distributed baffles 511 fixedly installed on the surface of the workbench 1, and two groups of relatively distributed threaded rods 512 are rotatably installed between the two groups of baffles 511. The threaded rods 512 are threadedly connected to the columns 21. A synchronous gear plate 513 is fixedly installed on the surface of the threaded rod 512. The two groups of synchronous gear plates 513 are commonly connected to a synchronous belt 514. One end of one group of threaded rods 512 extends to the outside of the baffle 511 and is connected to a motor 515.

[0029] When in use, the motor 515 drives a group of threaded rods 512 to rotate and then drives the synchronous gear plate 513 to rotate. The two groups of synchronous gear plates 513 cooperate with the synchronous belt 514 to drive the two groups of threaded rods 512 to rotate synchronously. The two groups of threaded rods 512 push the two groups of columns 21 to move synchronously in the horizontal direction at the side walls of the vertical plate 2, thereby adjusting the positions of the supporting rod 4, the coating pad 41 and the wiping pad 42.

[0030] like Figure 1 、 Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 As shown, as a preferred embodiment of the present invention, the lifting assembly 52 includes a vertical groove 521 opened on the surface of the column 21, and a sliding block 522 is installed in the vertical groove 521 for sliding in the vertical direction. The two ends of the supporting rod 4 are respectively rotatably connected to the sliding block 522, and the two opposite side walls of the two groups of vertical plates 2 are respectively provided with guide grooves 524, and the two ends of the guide grooves 524 are respectively set as broken line structures, and the side walls of the sliding block 522 are provided with guide rods 523 extending into the guide grooves 524.

[0031] Initially, the supporting rod 4 is located at one end of the workbench 1. At this time, the guide rod 523 at the side wall of the sliding block 522 is inserted into the guide groove 524 to a higher position. When the supporting rod 4 slides in the horizontal direction, the guide rod 523 moves synchronously along the guide groove 524. The guide rod 523 moves along the broken line trajectory and thus controls the sliding block 522 to move vertically in the vertical groove 521. The supporting rod 4 drives the coating pad 41 and the wiping plate 42 to move synchronously, thereby conveniently adjusting the height of the coating pad 41 and the wiping pad 42.

[0032] like Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 As shown, as a preferred embodiment of the present invention, the flip assembly 53 includes a fixed toothed disc 531 fixedly installed on the surface of the supporting rod 4, a bracket 532 fixedly installed on the side wall of the vertical plate 2, and a rack 533 fixedly installed on the end of the bracket 532 away from the vertical plate 2, the rack 533 is engaged with the fixed toothed disc 531, and two groups of relatively distributed first magnetic blocks 534 are fixedly installed on the side wall of the fixed toothed disc 531, and a second magnetic block 535 that cooperates with the first magnetic block 534 is fixedly installed on the side wall of the sliding block 522.

[0033] Initially, the second magnetic block 535 on the side wall of the sliding block 522 and the first magnetic block 534 on the side wall of the fixed gear plate 531 are attached to each other and connected to each other by magnetic attraction. When the support rod 4 moves in the horizontal direction, the fixed gear plate 531 is driven to move synchronously. The fixed gear plate 531 rolls along the surface of the rack 533, and the fixed gear plate 531 drives the support rod 4 to rotate synchronously around its own axis. At this time, the first magnetic block 534 and the second magnetic block 535 on the side wall of the fixed gear plate 531 are separated from each other. After the fixed gear plate 531 rotates 180 degrees, the fixed gear plate 531 and the rack 533 are separated from each other, and the second magnetic block 535 and the other first magnetic block 534 on the side wall of the fixed gear plate 531 are attached to each other and connected to each other as a whole. The second magnetic block 535 and the first magnetic block 534 cooperate with each other to position the support rod 4, so that the coating pad 41 and the wiping plate 42 remain in a vertical state.

[0034] like Figure 1 、 Figure 2 、 Figure 7 As shown, as a preferred embodiment of the present invention, the automatic loading component 6 includes a storage box 61 fixedly installed on the surface of the workbench 1, the surface of the storage box 61 is provided with an opening, a rotating column 62 is rotatably installed in the storage box 61, a cylindrical suction pad 63 is fixedly installed on the outside of the rotating column 62 through a support rod, the suction pad 63 extends through the opening to above the storage box 61, one end of the rotating column 62 extends to the outside of the storage box 61 and is connected to a one-way rotating part 7.

[0035] The ink is stored in the storage box 61, and the suction pad 63 fully absorbs the ink. When the carrying rod 4 drives the coating pad 41 to move above the storage box 61, the coating pad 41 moves along the surface of the suction pad 63, and the coating pad 41 contacts the suction pad 63. The suction pad 63 can add an appropriate amount of ink to the bottom of the coating pad 41. When moving, the coating pad 41 will push the suction pad 63 to rotate synchronously by a certain angle. When the coating pad 41 is coated multiple times, the coating pad 41 can contact different positions on the surface of the suction pad 63 in sequence.

[0036] like Figure 1 、 Figure 2 、 Figure 7 As shown, as a preferred embodiment of the present invention, the one-way rotating part 7 includes a rotating column 62 extending to a toothed disc 71 fixedly installed at one end outside the storage box 61, and a limit plate 72 that cooperates with the toothed disc 71 is rotatably installed on the side wall of the storage box 61. An extrusion spring 73 connected to the limit plate 72 is fixedly installed on the side wall of the storage box 61, and a blocking rod 74 that fits with the limit plate 72 is fixedly installed on the side wall of the storage box 61.

[0037] As the coating pad 41 moves, it pushes the suction pad 63 to rotate synchronously by a certain angle. At this time, the rotating column 62 drives the toothed disc 71 to rotate synchronously, and the limit plate 72 does not interfere with the rotation of the toothed disc 71. When the coating pad 41 moves in the opposite direction along the surface of the suction pad 63, the limit plate 72 blocks the toothed disc 71, effectively preventing the suction pad 63 from rotating in the opposite direction.

[0038] like Figure 1 、 Figure 2 As shown, as a preferred embodiment of the present invention, the coating pad 41 is made of sponge material, and the wiping plate 42 is made of sponge or rubber material.

[0039] The working principle of the present invention is as follows: initially, the supporting rod 41 is located on one side of the workbench 1, and the coating pad 41 is located below the supporting rod 41. The coating pad 41 is in contact with the suction pad 63, and the suction pad 63 can add an appropriate amount of ink to the bottom of the coating pad 41. The touch screen to be tested is placed in the placement groove 31 on the surface of the testing table 3. The motor 515 drives a set of threaded rods 512 to rotate, thereby driving the synchronous gear disc 513 to rotate. The two sets of synchronous gear discs 513 cooperate with the synchronous belt 514 to drive the two sets of threaded rods 512 to rotate synchronously. The two sets of threaded rods 512 push the two sets of columns 21 to move synchronously in the horizontal direction at the side wall of the vertical plate 2, thereby adjusting the position of the supporting rod 4, the coating pad 41, and the wiping pad 42.

[0040] When the support rod 4 slides horizontally, the guide rod 523 moves synchronously along the guide slot 524. The guide rod 523 moves along a broken-line trajectory, thereby controlling the sliding block 522 to move vertically within the vertical slot 521. The support rod 4 drives the coating pad 41 and the wiping plate 42 to move synchronously, thereby conveniently adjusting the height of the coating pad 41 and the wiping pad 42. The bottom end of the coating pad 41 is at the same height as the touch screen surface, and the coating pad 41 can now evenly apply ink to the touch screen surface. When the support rod 4 moves to the other end of the workbench 1, the fixed gear plate 531 rolls along the surface of the rack 533, driving the support rod 4 to rotate synchronously around its own axis. At this time, the first magnetic block 534 and the second magnetic block 535 on the side wall of the fixed gear plate 531 separate from each other. After the fixed toothed disc 531 rotates 180 degrees, it separates from the rack 533. The second magnetic block 535 and another set of first magnetic blocks 534 on the sidewall of the fixed toothed disc 531 are attached to each other and connected to form a whole. The second magnetic block 535 cooperates with the first magnetic block 534 to position the support rod 4, so that the coating pad 41 and the wiping plate 42 remain in a vertical position. The column 21 moves in the opposite direction horizontally. The column 21 and the support rod 4 cooperate with each other, thereby driving the wiping plate 42 to move in the opposite direction synchronously. The wiping plate 42 can wipe the ink applied to the touch screen surface in all directions. If the touch screen surface has scratches, the ink will be deposited in the scratches, allowing staff to easily check the scratches on the touch screen surface.

[0041] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in this field without departing from the purpose of the present invention.

Claims

1. A touch screen surface defect detection device, comprising a workbench, wherein two sets of vertical plates are fixedly mounted on the workbench surface, and vertical columns are slidably mounted on the opposite side walls of the two sets of vertical plates in the horizontal direction. A detection platform is fixedly mounted on the workbench surface, and a placement groove is opened on the detection platform surface, characterized in that: A bearing rod is rotatably provided between the two groups of columns, a coating pad is fixedly installed on the surface of the bearing rod, and a wiping plate is fixedly installed on the surface of the bearing plate and is distributed opposite to the coating pad; A positioning mechanism that cooperates with the bearing rod is provided between the two sets of vertical plates, and the positioning mechanism includes a translation component, a lifting component and a flip component; The translation assembly is located on the workbench surface and is connected to the columns. The translation assembly is used to control the two groups of columns to move synchronously in the horizontal direction at the side walls of the vertical plate. The lifting assembly is located on the surface of the column and is connected to the load-bearing rod. When the column drives the load-bearing rod to move in the horizontal direction, the lifting assembly is used to synchronously adjust the height of the load-bearing rod in the vertical direction. The flip assembly is connected to the carrying rod. When the column drives the carrying rod to move horizontally, the flip assembly is used to control the carrying rod to rotate 180 degrees around its own axis to adjust the relative position of the coating pad and the wiping plate. The workbench surface is provided with an automatic feeding component that cooperates with the coating pad. The automatic feeding component is used to add ink to the surface of the coating pad at equal time intervals.

2. A touch screen surface defect detection device according to claim 1, characterized in that: The translation assembly includes two groups of relatively distributed baffles fixedly installed on the surface of the workbench, two groups of relatively distributed threaded rods rotatably installed between the two groups of baffles, the threaded rods are threadedly connected to the columns, and synchronous gear plates are fixedly installed on the surface of the threaded rods. The two groups of synchronous gear plates are commonly connected to a synchronous belt, and one end of one group of threaded rods extends to the outside of the baffle and is connected to a motor.

3. The touch screen surface defect detection device according to claim 1, characterized in that: The lifting assembly includes a vertical groove opened on the surface of the column, a sliding block is installed in the vertical groove for sliding along the vertical direction, both ends of the bearing rod are rotatably connected to the sliding block, and guide grooves are opened on the opposite side walls of the two groups of vertical plates respectively, and the two ends of the guide grooves are respectively set as broken line structures, and the side walls of the sliding block are provided with guide rods extending into the guide grooves.

4. A touch screen surface defect detection device according to claim 3, characterized in that: The flip assembly includes a fixed gear plate fixedly mounted on the surface of the bearing rod, a bracket fixedly mounted on the side wall of the vertical plate, a rack fixedly mounted on the end of the bracket away from the vertical plate, the rack meshing with the fixed gear plate, two groups of relatively distributed first magnetic blocks fixedly mounted on the side wall of the fixed gear plate, and a second magnetic block that cooperates with the first magnetic block fixedly mounted on the side wall of the sliding block.

5. The touch screen surface defect detection device according to claim 1, characterized in that: The automatic loading assembly includes a material storage box fixedly installed on the surface of the workbench, an opening is provided on the surface of the material storage box, a rotating column is rotatably installed in the material storage box, a cylindrical material suction pad is fixedly installed on the outside of the rotating column through a support rod, the material suction pad extends through the opening to the top of the material storage box, and one end of the rotating column extends to the outside of the material storage box and is connected to a one-way rotating part.

6. The touch screen surface defect detection device according to claim 5, characterized in that: The one-way rotating part includes a gear disk fixedly installed at one end of a rotating column extending outside the storage box, a limit plate that cooperates with the gear disk is rotatably installed on the side wall of the storage box, an extrusion spring connected to the limit plate is fixedly installed on the side wall of the storage box, and a blocking rod that fits with the limit plate is fixedly installed on the side wall of the storage box.

7. The touch screen surface defect detection device according to claim 1, characterized in that: The coating pad is made of sponge material, and the wiping plate is made of sponge or rubber material.

Images