A membrane appearance inspection device

Abstract

This invention relates to the field of testing equipment technology, and specifically discloses a membrane appearance testing device. The membrane appearance testing device includes a feeding device, a transfer device, and a testing device. The transfer device is used to transfer membrane sheets stacked on the feeding device to the testing device. The feeding device includes a material tray and a first air blowing structure, which blows air towards the top of the membrane sheet stack. The transfer device includes a mounting plate and a suction cup. The suction cup includes a base and a disc body telescopically connected to the base. The disc body is provided with a negative pressure hole, and a first cavity communicating with the negative pressure hole is formed between the base and the disc body. In the initial state where the membrane sheet just contacts the suction cup, the suction cup adsorbs... The surface is flat. Under negative pressure suction, the disk will first adsorb and grasp the diaphragm. As the negative pressure suction continues, the diaphragm's sealing effect on the negative pressure hole will cause the first cavity to be in a negative pressure state and then the cavity to contract. This will cause the diaphragm in contact with the disk to bend and deform. Based on this arc-shaped bending change, it is easier to form a gap at the edge of two adjacent diaphragms, making it easier for airflow to enter between the two adjacent diaphragms through the gap. This will eliminate the vacuum area and electrostatic adhesion between the two adjacent diaphragms, so that the suction cup only grasps one diaphragm, thus ensuring the accuracy of the diaphragm appearance inspection.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, and in particular to a membrane appearance testing device. Background Technology

[0002] Adhesive films are widely used in electronic products such as mobile phones and televisions. However, during the production process, due to various factors, adhesive films may develop problems such as stains, scratches, and warping. These problems not only affect the appearance of the adhesive film, but may also affect its performance and service life. Therefore, it is crucial to conduct appearance inspection on adhesive films.

[0003] In related technologies, vision inspection systems are typically used to inspect the appearance of adhesive film products. These systems can accurately identify various defects, such as bubbles, broken adhesive, leaked adhesive, and uneven adhesive application. This high-precision identification capability helps reduce the defect rate and improve product quality. However, in these technologies, suction cups are usually used to place the adhesive film at the vision inspection station. During the suction cup gripping process, there are instances where two or more films are gripped at once, affecting the accuracy of the vision inspection system. Furthermore, manually interfering with the peeling of multiple adhered films reduces the smoothness of the vision inspection system, leading to decreased inspection efficiency. Summary of the Invention

[0004] This invention discloses a membrane appearance inspection device to solve the above-mentioned technical problems existing in related technologies.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] This application provides a membrane appearance inspection device, which includes a feeding device, a transfer device, and a detection device. The transfer device is used to transfer membrane sheets stacked on the feeding device to the detection device; wherein:

[0007] The feeding device includes a material tray and a first air blowing structure. The membranes are stacked on the material tray to form a membrane stack. The first air blowing structure is provided with a first air hole, which is configured to blow air toward the top of the membrane stack, so that the membranes at the top layer and the membranes at the next top layer are separated from each other.

[0008] The transfer device includes a mounting plate and a suction cup mounted on the mounting plate. The suction cup includes a base and a disc body telescopically connected to the base. The disc body is provided with a negative pressure hole. A first cavity communicating with the negative pressure hole is formed between the base and the disc body. The suction cup has a first state and a second state. In the first state, the adsorption surface of the disc body is a convex plane. In the second state, the disc body is attached to the base so that the adsorption surface changes to an arc surface. The suction cup is configured to switch from the first state to the second state under the action of negative pressure suction.

[0009] Furthermore, the disc body has multiple deformation grooves on the side facing the base.

[0010] Furthermore, the base has an attachment surface facing the disc body, the attachment surface being a convex arc surface, and in the second state, the disc body is attached to the attachment surface; the base also has a guide groove on the attachment surface, the guide groove extending from the high point of the attachment surface to the low point of the attachment surface.

[0011] Furthermore, the feeding device also includes a second air blowing structure, the air blowing direction of the second air blowing structure is towards the adsorption surface of the suction cup, and the air blowing direction of the second air blowing structure is higher than the air blowing direction of the first air blowing structure.

[0012] Furthermore, the second blowing structure is provided with a second air hole, which is a longitudinally extending strip. When the suction cup is in the second state, the length of the second air hole distributed above the diaphragm is greater than the length of the second air hole distributed below the diaphragm.

[0013] Furthermore, the feeding device also includes a friction structure disposed on the first air blowing structure along the longitudinal direction. At least a portion of the friction structure overlaps with the first air hole, and the lower part of the first air hole extends beyond the friction structure. The friction structure is used to make frictional contact with the diaphragm.

[0014] Furthermore, the base includes a seat body and a base body connected to the seat body. In the second state, the disc body is attached to the base body, and a second cavity is provided between the base body and the seat body. The second cavity is configured to cause the base body to contract relative to the seat body in a suction state.

[0015] Furthermore, the mounting plate is also provided with a support member, which corresponds to the edge of the diaphragm. When the base body shrinks relative to the seat body, the support member abuts against the edge of the diaphragm, causing the diaphragm to bend and deform.

[0016] Furthermore, the suction cup includes two opposing suction units, and the distance between the two suction units is adjustable.

[0017] Furthermore, the mounting plate is provided with a sliding groove extending along the first direction, and the adsorption unit can slide along the sliding groove and be connected and fixed to the mounting plate through a connector.

[0018] The technical solution adopted in this invention can achieve the following beneficial effects:

[0019] The membrane appearance inspection device of this application, in the initial state when the membrane just comes into contact with the suction cup, the adsorption surface of the suction cup is flat, which can ensure the uniformity and stability of the contact with the membrane. Under the action of negative pressure suction, the cup will first adsorb and grab the membrane. As the negative pressure suction continues, based on the sealing effect of the membrane on the negative pressure hole, the first cavity can be made into a negative pressure state and then the cavity will shrink. During the shrinkage of the first cavity, the cup gradually adheres to the base, and the adsorption surface changes to a convex arc surface, which causes the membrane adsorbed and in contact with the cup to bend and deform. When the suction cup has picked up at least two membranes, based on this arc bending change, it is easier to form a gap at the edge of the two adjacent membranes, so that the airflow blown by the first blowing structure can more easily enter between the two adjacent membranes through the gap, thereby eliminating the vacuum area and electrostatic adhesion between the two adjacent membranes. The two adjacent membranes automatically separate due to the disappearance of the adhesion force, so that the suction cup only grabs one membrane, thereby ensuring the accuracy of membrane appearance inspection. Attached Figure Description

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of the structure of the membrane appearance inspection device according to an embodiment of this application;

[0022] Figure 2 This is a schematic diagram of the structure of the feeding device according to an embodiment of this application;

[0023] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle;

[0024] Figure 4 This is one of the structural schematic diagrams of the transfer device according to an embodiment of this application;

[0025] Figure 5 This is a second schematic diagram of the transfer device according to an embodiment of this application;

[0026] Figure 6 This is a cross-sectional schematic diagram of the suction cup according to an embodiment of this application;

[0027] Figure 7 This is one of the schematic diagrams showing the cooperation between the transfer device and the feeding device in an embodiment of this application;

[0028] Figure 8 This is the second schematic diagram of the cooperation between the transfer device and the feeding device in the embodiments of this application;

[0029] Figure 9 This is the third schematic diagram of the cooperation between the transfer device and the feeding device in the embodiments of this application;

[0030] In the picture:

[0031] 100. Feeding device; 110. Material tray; 120. First air blowing structure; 121. First air hole; 130. Second air blowing structure; 131. Second air hole; 140. Third air blowing structure; 141. Third air hole; 150. Friction structure; 200. Transfer device; 210. Mounting plate; 211. Slide groove; 220. Suction cup; 221. Base; 2211. Seat body; 2212. Base; 2212a. Attachment surface; 2212b. Guide groove; 2213. Second cavity; 2214. Cylindrical elastic membrane; 222. Disc body; 2221. Negative pressure hole; 2222. Deformation groove; 223. First cavity; 224. Corrugated cover; 230. Support member; 300. Detection device; 400. Diaphragm; 510. Connector. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0033] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0034] The following is in conjunction with the appendix Figures 1 to 9 The membrane appearance inspection equipment provided in this application will be described in detail through specific embodiments and application scenarios.

[0035] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 This application discloses a membrane appearance inspection device, which includes a feeding device 100, a transfer device 200, and an inspection device 300. The feeding device 100 has membrane sheets 400 stacked on it, and the transfer device 200 is used to transfer the membrane sheets 400 stacked on the feeding device 100 to the inspection device 300 for appearance inspection. In this application embodiment, the inspection device 300 can be a prior art visual inspection system. The visual inspection system uses a high-resolution camera and advanced image processing algorithms, which can accurately identify various defects in the membrane sheet 400 product, such as bubbles, broken glue, leaked glue, uneven glue application, etc., without manual intervention, and has the characteristics of accurate detection and high detection efficiency.

[0036] In the embodiments of this application, please refer to Figure 2 and Figure 3 The feeding device 100 includes a material tray 110 and a first air blowing structure 120. Multiple membranes 400 are stacked on the material tray 110 to form a membrane stack. The feeding device 100 also includes a lifting mechanism (not shown in the figure). The lifting mechanism is used to push the membrane stack to move up intermittently, so that the top membrane 400 in the membrane stack is grabbed by the transfer device 200 at a preset height position and transferred to the detection device 300.

[0037] In this embodiment, the first air-blowing structure 120 can be disposed on the material tray 110 or adjacent to the material tray 110, so that the two are kept in a relatively fixed state. This application will not elaborate on this. Exemplarily, the first air-blowing structure 120 can be a longitudinally extending columnar or strip-shaped pipe disposed on the material tray 110, which has a hollow inner cavity. The first air-blowing structure 120 is provided with a first air hole 121 communicating with the hollow inner cavity. Exemplarily, the first air hole 121 can be a longitudinally extending strip-shaped hole. The air-blowing direction of the first air hole 121 is towards the top of the membrane stack. By blowing air to the top of the membrane stack through the first air hole 121, the membrane 400 located at the top layer of the membrane stack can be easily separated from the membrane stack. This makes it easier for the transfer device 200 to grasp a single membrane 400, thereby ensuring the accuracy of the detection of the membrane 400 at the detection device 300.

[0038] However, the inventors discovered during their research that even with the first air-blowing structure 120 positioned at the edge of the tray 110, the relatively smooth surface of the diaphragm 400 and the close contact between two adjacent diaphragms 400 almost completely isolating them from air caused by the air. This resulted in a localized vacuum easily forming between the two adjacent diaphragms 400. Furthermore, the potential for electrostatic adhesion between the two adjacent diaphragms 400 made them prone to sticking together. Due to the light weight of the diaphragms 400, when the first air-blowing structure 120 separated the top layer of diaphragms 400, the separated diaphragms 400 might still stick together. Typically, two to three diaphragms 400 would be blown up simultaneously and grabbed by the transfer device 200, leading to inaccurate detection and missed detections.

[0039] In light of this situation, please refer to the figure in the embodiment of this application. Figure 4 , Figure 5 and Figure 6 The transfer device 200 includes a mounting plate 210 and suction cups 220 disposed on the mounting plate 210. For example, two suction cups 220 may be disposed on the mounting plate 210. The two suction cups 220 may be distributed along the width direction of the mounting plate 210, and the membrane 400 may be adsorbed and grasped by the two suction cups 220. Specifically, the suction cup 220 includes a base 221 and a disc 222, wherein the disc 222 is telescopically connected to the base 221. For example, the disc 222 can be telescopically connected to the base 221 through a corrugated cover 224, so that a first cavity 223 is formed between the disc 222 and the base 221. The first cavity 223 is connected to a negative pressure source through a negative pressure pipe. The disc 222 is provided with a negative pressure hole 2221 that communicates with and penetrates the first cavity 223. The base 221 has an attachment surface 2212a facing the disc 222, and the attachment surface 2212a is a convex arc surface. The disc 222 has an adsorption surface facing away from the base 221.

[0040] In this embodiment, the suction cup 220 has a first state and a second state. Specifically, in the first state, that is, when the suction cup 220 is not connected to the negative pressure source, the disc body 222 is in an extended state relative to the base 221. At this time, the adsorption surface of the disc body 222 is a plane. In the second state, the suction cup 220 is connected to the negative pressure source and the disc body 222 is contracted relative to the base 221. The disc body 222 is attached to the attachment surface 2212a of the base 221 and the adsorption surface is adaptively changed to an arc surface. It can be understood that the suction cup 220 can switch from the first state to the second state under the suction action of the negative pressure source.

[0041] It should be noted that, in this embodiment, the disc 222 is typically made of a soft and sealing material to ensure that the disc 222 forms a seal when in contact with the diaphragm 400, thereby creating a vacuum or pressure difference. Simultaneously, based on the soft nature of the disc 222, it has the ability to deform to adapt to the switching between the first and second states. For example, the disc 222 can be a structural component made of materials such as rubber, silicone, polyurethane, or TPE. It is understood that, in this embodiment, if the suction cup 220 needs to switch from the first state to the second state, the disc 222 needs to have the diaphragm 400 adsorbed to block the negative pressure hole 2221 in order to create a negative pressure environment for the first cavity 223, thereby causing the disc 222 to contract to a state that fits against the base 221, thus achieving the switching of the suction cup 220 from the first state to the second state.

[0042] Based on the above technical solutions, please refer to Figure 6 and Figure 7 In the specific application of the membrane appearance inspection device of this application embodiment, in the initial state when the membrane 400 just comes into contact with the suction cup 220, the suction cup 220 is in the first state, and the adsorption surface of the suction cup 220 is flat, which can ensure the uniformity and stability of the contact with the membrane 400. Under the action of negative pressure suction, the disk 222 will first adsorb and grasp the membrane 400. As the negative pressure suction continues, based on the sealing effect of the membrane 400 on the negative pressure hole 2221, the first cavity 223 can be in a negative pressure state and then the cavity will shrink. During the shrinkage of the first cavity 223, the disk 222 gradually attaches to the attachment surface 2212a of the base 221, thus adsorbing... The surface adapts to change into a convex arc surface, which causes the diaphragm 400 adsorbed and contacted by the disk 222 to bend and deform. If the suction cup 220 adsorbs and grasps two or more diaphragms 400, based on this arc bending change, it is easier to form a gap at the edge of two adjacent diaphragms 400, so that the airflow blown by the first blowing structure 120 can more easily enter between the two adjacent diaphragms 400 through the gap, thereby eliminating the vacuum area and electrostatic adhesion between the two adjacent diaphragms. The two adjacent diaphragms 400 automatically separate due to the disappearance of the adhesive force, so that the suction cup 220 only grasps one diaphragm 400, thereby ensuring the accuracy of the appearance inspection of the diaphragm 400 at the detection device 300.

[0043] As described above, based on the continuous negative pressure suction effect of the negative pressure source, the disc 222 bends and becomes arc-shaped. In this embodiment, the disc 222 is provided with a plurality of deformation grooves 2222 on the side facing the base 221. The plurality of deformation grooves 2222 are distributed along a first direction. For example, the first direction can be the length direction of the mounting plate 210. When the disc 222 bends and deforms, the size of the disc 222 in the first direction is reduced. Based on the provision of the plurality of deformation grooves 2222, on the one hand, the disc 222 can be bent into an arc shape more easily, thereby maintaining a good tight fit with the attachment surface 2212a. On the other hand, during the process of the disc 222 shrinking and deforming relative to the base 221, the deformation grooves 2222 serve as stress release points, which help to disperse and alleviate the stress generated by bending, reduce the risk of material fatigue and damage caused by stress concentration, and extend the service life of the disc 222.

[0044] During the research process, the inventors discovered that because the attachment surface 2212a on the base 221 is a convex arc surface, when the first cavity 223 is vacuumed under negative pressure, a portion of the disc 222 will have a certain sealing effect after contacting the attachment surface 2212a, preventing the negative pressure source from completely vacuuming the first cavity 223. As a result, there are still some gap areas in the first cavity 223 that have not been vacuumed. In this case, the disc 222 cannot be completely and tightly attached to the base 221, and the bending separation effect produced by the disc 222 driving the diaphragm 400 to bend is relatively limited.

[0045] In this case, please continue to see Figure 6 and Figure 7 In a further technical solution, the base 221 also has a guide groove 2212b on the attachment surface 2212a. The guide groove 2212b extends from the attachment surface 2212a to the lower part of the attachment surface 2212a, that is, it extends in the length direction of the mounting plate 210. With this arrangement, when the first cavity 223 is evacuated, the air in each part of the first cavity 223 can be extracted based on the air guiding effect of the guide groove 2212b, so that the disc 222 in the second state can be tightly and stably attached to the attachment surface 2212a.

[0046] In the aforementioned embodiment, after the top layer diaphragm 400 is bent, the edge of the top layer diaphragm 400 is usually higher than the middle position of the diaphragm 400, and the blowing direction of the first blowing structure 120 is towards the upper part of the diaphragm stack. As a result, the airflow entering through the gap between the top layer diaphragm 400 and the second top layer diaphragm 400 is small, and the peeling effect is limited.

[0047] Based on this situation, in some embodiments of this application, the feeding device 100 further includes a second air blowing structure 130. Similarly, the second air blowing structure 130 can be a longitudinally extending columnar or strip-shaped pipe provided on the material tray 110. The second air blowing structure 130 is provided with a second air hole 131. The air blowing direction of the second air blowing structure 130 is higher than the air blowing direction of the first air blowing structure 120. In a preferred embodiment, the air blowing direction of the second air blowing structure 130 corresponds to the edge of the bent diaphragm 400. In this way, when the second air blowing structure 130 blows air, more airflow can enter between the two adjacent diaphragms 400 through the slit, thereby accelerating the separation effect of the two adjacent diaphragms 400 and avoiding the situation where some diaphragms 400 fall outside the material tray 110 due to separation delay when the transfer device 200 leaves the feeding device 100.

[0048] For further technical solutions, please refer to Figure 6 , Figure 7 and Figure 8 The second vent 131 is a longitudinally extending strip. When the suction cup 220 is in the second state, the length of the portion of the second vent 131 distributed above the diaphragm 400 is greater than the length of the portion of the second vent 131 distributed below the diaphragm 400. The second vent 131 is configured to intermittently blow air onto the diaphragm 400. With this configuration, during the blowing process of the second vent 131, the first airflow force above the diaphragm 400 is greater than the second airflow force below the diaphragm 400. The first airflow force can exert a certain downward pressure on the upwardly curved portion of the edge of the diaphragm 400, while the edge of the diaphragm 400 tends to curve upward under the action of the suction cup 220. Thus, during the intermittent blowing process of the second vent 131, the edge of the diaphragm 400 can oscillate up and down, which is more conducive to the accelerated separation of the two adhered diaphragms 400 at the edge.

[0049] In optional embodiments of this application, please continue to refer to Figure 2 and Figure 3The feeding device 100 may further include a friction structure 150, which may be disposed on the first air blowing structure 120. In the longitudinal direction, at least a portion of the friction structure 150 overlaps with the first air hole 121, and the lower part of the first air hole 121 extends beyond the friction structure 150. For example, the friction structure may be a protrusion disposed on the first air blowing structure 120 and distributed on both sides of the first air hole 121. In this way, when two adhered films 400 pass through the friction structure... The friction structure first contacts the upper diaphragm 400, and then the lower diaphragm 400. During this process, due to the order of contact, the later diaphragm 400 will naturally create a gap with the previous diaphragm 400 when it releases from the friction structure 150. Simultaneously, based on the longitudinal overlap of the first vent 121 and the friction structure 150, airflow is blown between the two diaphragms 400 at the same time the gap is created, thereby ensuring the formation of the gap and accelerating the separation of the diaphragms 400. In some embodiments, the friction structure can be made of a material with a higher coefficient of friction. For example, the friction structure can be a rubber sheet adhered to or embedded on both sides of the first vent 121. Optionally, an inclined guide surface is provided on the lower end of the friction structure.

[0050] In some embodiments, the surface of the friction structure is provided with a plurality of horizontal strip-shaped protrusions. The gap between two adjacent strip-shaped protrusions is greater than the thickness of a single-layer diaphragm 400. During the process of the two-layer diaphragm 400 contacting and deforming with the friction structure, the lower layer of the two-layer diaphragm 400 will inevitably scrape against the strip-shaped protrusions, while the upper layer will not. This results in the upper layer of the diaphragm 400 experiencing less friction than the lower layer, leading to a larger difference in the elastic deformation between the upper and lower layers of the diaphragm 400, which is beneficial for the separation of the two-layer diaphragm 400.

[0051] For some embodiments of this application, please refer to Figure 8 and Figure 9The base 221 includes a seat body 2211 and a base body 2212 connecting the seat body 2211. The base body 2212 forms the aforementioned attachment surface 2212a on the side facing the disc body 222. A guide groove 2212b is formed in the base body 2212. In the second state, the aforementioned disc body 222 is attached to the base body 2212. In this embodiment, the substrate 2212 is telescopically arranged relative to the seat 2211, and a second cavity 2213 is provided between them. The second cavity 2213 is connected to a negative pressure source. The second cavity 2213 is configured to cause the substrate 2212 to contract relative to the seat 2211 in a suction state. In this way, the two adhesive films 400 can be separated at their middle positions. Moreover, this contraction action is a pre-lifting of the grasped film 400. Compared with the direct lifting and transfer method, the grasped top film 400 can play a certain blocking and limiting role on the separated second-top film 400, preventing the second-top film 400 from being carried out and falling outside the material tray 110.

[0052] In one optional embodiment, the substrate 2212 can be slidably sleeved on the seat 2211, and the upper part of the substrate 2212 can be connected to the seat 2211 through the tubular elastic membrane 2214. When the negative pressure source sucks the second cavity 2213, the tubular elastic membrane 2214 shrinks to form folds while the substrate 2212 slides upward relative to the seat 2211 to achieve pre-lifting of the middle part of the diaphragm 400. This method has the characteristics of convenient assembly and good sealing performance.

[0053] In another alternative embodiment, the substrate 2212 can be an elastomer, comprising a first part and a second part. The first part is fixedly connected to the seat 2211. Exemplarily, the first part can be sleeved on the seat 2211 and fixedly connected by adhesive. The second part is connected to the first part. The aforementioned attachment surface 2212a and guide groove 2212b are both disposed in the second part. When the negative pressure source suctions the second cavity 2213, the second part contracts relative to the first part to achieve pre-lifting of the middle part of the diaphragm 400. Exemplarily, by pre-lifting the middle part of the diaphragm 400, combined with the gas blown in by the first blowing structure 120, it is beneficial to separate the middle part of the diaphragm 400 adsorbed on the suction cup 220 from the diaphragm 400 below.

[0054] For further technical solutions, please refer to Figure 8 and Figure 9The transfer device 200 may further include a support member 230, which is disposed on the mounting plate 210. Exemplarily, the support member 230 may be a columnar structure. The support member 230 corresponds to the edge of the diaphragm 400. When the substrate 2212 contracts relative to the seat 2211, the support member 230 abuts against the edge of the diaphragm 400, causing the diaphragm 400 to bend and deform. That is, when the diaphragm 400 is not in contact with the support member 230, both sides of the diaphragm 400 warp upwards. When the diaphragm 400 comes into contact with the support member 230, the edge portion of the diaphragm 400 bends downwards again, thus further increasing the number and tendency of bending deformation of the diaphragm 400, further ensuring the stable separation of the two adhesive diaphragms 400.

[0055] For further technical solutions, please refer to Figure 7 , Figure 8 and Figure 9 The feeding device 100 may also include a third air blowing structure 140, which is provided with a third air hole 141. The air blowing direction of the third air hole 141 is located between the first air blowing structure 120 and the second air blowing structure 130, so as to adapt to the edge position of the diaphragm 400 after being adjusted by the support member 230.

[0056] In this embodiment, the suction cup 220 includes two opposing suction units with an adjustable spacing between them. This allows the two suction units to adapt to the bending properties of membranes 400 of different materials and sizes, thus providing good versatility for the transfer device when transferring membranes 400. For example, the mounting plate 210 is provided with a groove 211 extending along a first direction. The suction unit can slide along the groove 211 and, when slid to a suitable position, can be connected and fixed to the mounting plate 210 via a connector 510.

[0057] In some embodiments, the disc 222 includes a deformable portion and a fixing portion. Exemplarily, the deformable portion is located at the end of the disc structure, and its deformation can deform the adsorption surfaces at both ends of the disc 222 into arc-shaped adsorption surfaces. Optionally, the fixing portion is located in the middle of the disc 222, and optionally, the fixing portion does not deform during the adsorption of the membrane 400. In an optional embodiment, a negative pressure hole 2221 is provided in the deformable portion and communicates with the first cavity 223. The fixing portion is provided with an adsorption hole, which communicates with the second cavity 2213. In some optional embodiments, after the membrane 400 is separated, air can be introduced into the first cavity 223 to restore the deformation of the deformable portion, thereby allowing the membrane 400 to regain its deformation. Since the second cavity 2213 remains under negative pressure, the membrane 400 can still be adsorbed and fixed onto the disc 222 through the adsorption hole provided in the fixing portion. This embodiment can eliminate the stress of bending deformation of the diaphragm 400 during the process of removing the diaphragm 400 from the disc 222, which is beneficial to the smooth removal of the diaphragm 400.

[0058] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0059] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A membrane appearance inspection device, characterized in that, The device includes a feeding device (100), a transfer device (200), and a detection device (300), wherein the transfer device (200) is used to transfer the films (400) stacked on the feeding device (100) to the detection device (300); wherein: The feeding device (100) includes a material tray (110) and a first air blowing structure (120). The diaphragms (400) are stacked on the material tray (110) to form a diaphragm stack. The first air blowing structure (120) is provided with a first air hole (121). The first air hole (121) is configured to blow air toward the top of the diaphragm stack, so that the diaphragm (400) at the top layer and the diaphragm (400) at the next top layer are separated from each other. The transfer device (200) includes a mounting plate (210) and a suction cup (220) disposed on the mounting plate (210). The suction cup (220) includes a base (221) and a disc body (222) telescopically connected to the base (221). The disc body (222) is provided with a negative pressure hole (2221). A first cavity (223) communicating with the negative pressure hole (2221) is formed between the base (221) and the disc body (222). The suction cup (220) has a first state and a second state. In the first state, the adsorption surface of the disc body (222) is a plane. In the second state, the disc body (222) is attached to the base (221) so that the adsorption surface changes to an arc surface. The suction cup (220) is configured to switch from the first state to the second state under the action of negative pressure suction. The base (221) has an attachment surface (2212a) facing the disk (222), the attachment surface (2212a) is a convex arc surface, in the second state, the disk (222) is attached to the attachment surface (2212a), the base (221) also has a guide groove (2212b) on the attachment surface (2212a), the guide groove (2212b) extends from the high point of the attachment surface (2212a) to the low point of the attachment surface (2212a); The feeding device (100) further includes a second air blowing structure (130), the air blowing direction of the second air blowing structure (130) is toward the adsorption surface of the suction cup (220), and the air blowing direction of the second air blowing structure (130) is higher than the air blowing direction of the first air blowing structure (120).

2. The membrane appearance inspection device according to claim 1, characterized in that, The disc body (222) has a plurality of deformation grooves (2222) on the side facing the base (221).

3. The membrane appearance inspection device according to claim 1, characterized in that, The second air blowing structure (130) is provided with a second air hole (131). The second air hole (131) is a long strip extending longitudinally. When the suction cup (220) is in the second state, the length of the portion of the second air hole (131) distributed above the diaphragm (400) is greater than the length of the portion of the second air hole (131) distributed below the diaphragm (400).

4. The membrane appearance inspection device according to any one of claims 1 to 3, characterized in that, The feeding device (100) further includes a friction structure (150), which is disposed on the first air blowing structure (120). In the longitudinal direction, at least a portion of the friction structure (150) overlaps with the first air hole (121), and the lower part of the first air hole (121) extends beyond the friction structure (150). The friction structure (150) is used to make frictional contact with the diaphragm (400).

5. The membrane appearance inspection device according to any one of claims 1 to 3, characterized in that, The base (221) includes a seat (2211) and a base (2212) connected to the seat (2211). In the second state, the disc (222) is attached to the base (2212). A second cavity (2213) is provided between the base (2212) and the seat (2211). The second cavity (2213) is configured to cause the base (2212) to contract relative to the seat (2211) in a suction state.

6. The membrane appearance inspection device according to claim 5, characterized in that, The mounting plate (210) is also provided with a support member (230), which corresponds to the edge of the diaphragm (400). When the base (2212) shrinks relative to the seat (2211), the support member (230) abuts against the edge of the diaphragm (400), causing the diaphragm (400) to bend and deform.

7. The membrane appearance inspection device according to any one of claims 1 to 3, characterized in that, The suction cup (220) includes two adsorption units arranged opposite each other, and the distance between the two adsorption units is adjustable.

8. The membrane appearance inspection device according to claim 7, characterized in that, The mounting plate (210) is provided with a sliding groove (211) extending along a first direction. The adsorption unit can slide along the sliding groove (211) and be connected and fixed to the mounting plate (210) through a connector (510).

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