Cleaning equipment for OCA (Optical Clear Adhesive)

Abstract

The utility model relates to the field of adhesive removing equipment, in particular to cleaning equipment for OCA optical cement, the cleaning equipment for the OCA optical cement comprises a spraying system, a scraping system, a conveying system and a supporting platform, one end of the supporting platform abuts against a working face, the other end of the supporting platform is fixedly connected with the conveying system, the conveying system is used for conveying a workpiece needing to be cleaned, and the spraying system is used for spraying the workpiece needing to be cleaned. The spraying system is fixedly connected with the supporting platform, the spraying system is arranged right opposite to the conveying system, the spraying system is used for spraying a cleaning agent to workpieces placed on the conveying system, the two ends of the scraping system are fixedly connected with the supporting platform, and a gap exists between the scraping system and the conveying platform. And the scraping system is used for cleaning glue on the surfaces of the workpieces, and the effect of reducing the labor intensity of workers is achieved.

Description

Technical Field

[0001] This application relates to the field of adhesive removal equipment, and in particular to a cleaning device for OCA optical adhesive. Background Technology

[0002] Currently, OCA optical adhesive is a special adhesive used for bonding transparent optical components, belonging to the category of pressure-sensitive adhesives. It is mainly composed of optical acrylic adhesive without a substrate, with a release film laminated to the top and bottom layers, forming a substrate-free, high-transparency, double-sided adhesive tape. OCA optical adhesive features high transparency, high light transmittance (total light transmittance >99%), high adhesion, water and high temperature resistance, UV resistance, good bonding strength, and low curing shrinkage. It is one of the important raw materials for touch screens, mainly used for bonding materials on touch screens to achieve capacitive touch sensing.

[0003] The common method for removing excess OCA optical adhesive after pasting is to use a special adhesive remover, apply it to the OCA optical adhesive, and then manually wipe or scrape off the adhesive with a tool.

[0004] The existing technical solutions mentioned above have the following drawbacks: the removal of OCA optical adhesive by hand tools results in excessive labor intensity for workers. Utility Model Content

[0005] This application provides a cleaning device for OCA optical adhesive in order to reduce the labor intensity of workers.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution:

[0007] A cleaning device for OCA optical adhesive includes a spraying system, a scraping system, a conveying system, and a support platform. One end of the support platform abuts against a working surface, and the other end is fixedly connected to the conveying system. The conveying system is used to convey the workpiece to be cleaned. The spraying system is fixedly connected to the support platform and is positioned opposite the conveying system. The spraying system sprays cleaning agent onto the workpiece placed on the conveying system. Both ends of the scraping system are fixedly connected to the support platform, and a gap exists between the scraping system and the conveying platform. The scraping system is used to remove the adhesive from the surface of the workpiece. The cleaning process is as follows: The conveying system includes a conveying rod, a balance rod, a conveying ring, and a balance ring. A conveying groove and a balance groove are formed on the surface of the support platform. The conveying rod is positioned within the conveying groove, with both ends rotatably connected to it. The balance rod is positioned within the balance groove, with both ends fixedly connected to it. The conveying ring is sleeved around the conveying rod and threadedly connected to it. The balance ring is sleeved around the balance rod and slidably connected to it. A conveying plate is fixedly connected to the end of the balance ring and the conveying ring furthest from the working surface. The conveying plate is used to place the workpiece to be degummed.

[0008] By adopting the above solution, the workpiece is placed on the conveyor plate, and the conveyor rod is driven to rotate. The conveyor rod can drive the conveyor ring to move along the conveyor rod. Since the conveyor ring is fixedly connected to the conveyor plate, the conveyor ring can drive the conveyor plate to move, and the conveyor plate can drive the workpiece to move. Because the spraying component is set in accordance with the conveying system, the surface of the workpiece can be sprayed with spraying liquid during the displacement process. Then, as the conveyor rod continues to rotate, the workpiece is conveyed to the scraping system. The scraping system scrapes off the glue on the surface of the workpiece. In summary, this avoids workers manually spraying spraying liquid on the workpiece and manually scraping off the glue on the surface of the workpiece, thus reducing the labor intensity of workers.

[0009] Furthermore, the spraying system includes a conveying pipe, a spraying pipe, and a water tank. The water tank and the conveying pipe are both fixedly connected to the support platform. One end of the conveying pipe is inserted into the water tank, and the other end of the conveying pipe is connected to the spraying pipe. The spraying holes of the spraying pipe are set directly opposite the conveying plate. A water pump is also connected to the conveying pipe.

[0010] By adopting the above solution, under the action of the pumping unit, the spray liquid inside the water tank is pumped into the delivery pipe and then sprayed onto the surface of the workpiece through the spray pipe, thereby avoiding the need for personnel to hold the spray pipe and spray the workpiece surface with the spray liquid.

[0011] Furthermore, the scraping system includes a scraper and two lifting plates. The two lifting plates are located on both sides of the support platform and are perpendicular to the support platform. One end of each lifting plate is fixedly connected to the support platform, and the other end of each lifting plate is fixedly connected to both ends of the scraper. Each lifting plate includes a sleeve plate and an inner plate. The inner plate is embedded in the sleeve plate. The end of the sleeve plate away from the inner plate is fixedly connected to the support platform, and the end of the inner plate away from the support platform is fixedly connected to the scraper. A set screw is threaded onto the sleeve plate, and the set screw passes through the side wall of the sleeve plate and abuts against the inner plate.

[0012] By adopting the above scheme, the positional relationship between the inner plate and the sleeve plate can be adjusted, thereby adjusting the height of the lifting plate. Since the other ends of the two lifting plates are fixedly connected to the two ends of the scraper, changing the height of the lifting plate can change the gap between the scraper and the support platform, thus enabling the device to perform degumming operations on workpieces of different thicknesses. Furthermore, since there is a set screw threaded on the sleeve plate, once the relative positional relationship between the inner plate and the sleeve plate is determined, rotating the set screw causes it to pass through the side wall of the sleeve plate and abut against the inner plate, thereby locking the relative positional relationship between the sleeve plate and the inner plate, and thus locking the size of the gap between the scraper and the support platform.

[0013] Furthermore, a cleaning plate is connected to the side of the scraper near the support platform, and the side of the cleaning plate away from the scraper abuts against the workpiece.

[0014] Furthermore, the scraper has a groove at one end near the cleaning plate, the cleaning plate is embedded in the groove, and there are fixing members on both sides of the groove. Each fixing member is threadedly connected to the groove and passes through the side wall of the groove to abut against the cleaning plate.

[0015] By adopting the above solution, the cleaning plate and the groove are detachably connected. When the cleaning plate is worn, it can be pulled away from the bottom wall of the groove. Then, the relative position between the cleaning plate and the groove can be determined by using a fastener. When the cleaning plate is completely worn, it can be replaced.

[0016] Furthermore, stabilizing components are provided around the conveyor plate, with at least four stabilizing components. Each stabilizing component includes a support block, an elastic element, and an abutment block. The support block is fixedly connected to the conveyor plate, and the elastic element is disposed between the support block and the abutment block. Both ends of the elastic element are fixedly connected to the support block and the abutment block, respectively, and the end of the abutment block away from the elastic element abuts against the conveyor plate.

[0017] By adopting the above scheme, after the workpiece is placed on the conveyor plate, there is a stabilizing component on each of the four sides of the workpiece, and each elastic element pushes towards the end closest to the workpiece, thereby clamping the workpiece.

[0018] Furthermore, a telescopic rod is provided between each of the abutment blocks and the elastic element. Each telescopic rod includes an outer rod and a sliding rod. One end of the outer rod is fixedly connected to the support block. A sliding groove is provided at the end of the outer rod away from the support block. One end of the sliding rod is inserted into the sliding groove. The other end of the sliding rod is fixedly connected to the abutment block. An anti-detachment component is also provided between the sliding rod and the sliding groove.

[0019] By adopting the above scheme, during the compression or rebound of the elastic element, the slide bar moves synchronously along the slide groove. The movement of the slide bar along the slide groove can limit the movement direction of the elastic element, preventing the elastic element from undergoing elastic deformation that would prevent it from clamping the workpiece, thus causing the workpiece to fall off during the conveyor plate and be damaged.

[0020] Furthermore, each of the anti-detachment components includes a first anti-detachment ring and a second anti-detachment ring. The first anti-detachment ring is arranged around the opening of the slide groove and is fixedly connected to the slide groove. The second anti-detachment ring is arranged at one end of the slide rod inserted into the slide groove and is fixedly connected to the slide rod. When the slide rod moves along the slide groove, when the first anti-detachment ring and the second anti-detachment ring abut, the maximum extension length between the slide rod and the slide groove is limited.

[0021] By adopting the above scheme, during the compression or rebound of the elastic element, the slide rod moves synchronously along the slide groove. Because a first anti-detachment ring and a second anti-detachment ring are set, the maximum extension distance of the telescopic rod is reached when the first anti-detachment ring and the second anti-detachment ring abut, which can prevent the slide rod from falling off in the slide groove.

[0022] In summary, this application has the following technical effects:

[0023] By setting up this cleaning equipment, the drive conveyor rod rotates, which in turn moves the conveyor ring along the conveyor rod. Since the conveyor ring is fixedly connected to the conveyor plate, the conveyor ring can move the conveyor plate, which in turn moves the workpiece. Because the spraying component is set up in accordance with the conveying system, the workpiece surface is sprayed with spraying liquid during the movement process. Then, as the conveyor rod continues to rotate, the workpiece is conveyed to the scraping system, which scrapes off the glue on the workpiece surface. In summary, this avoids workers manually spraying the workpiece with spraying liquid and manually scraping off the glue on the workpiece surface, thus reducing the labor intensity of workers.

[0024] By setting up a cleaning plate, when the cleaning plate is worn, it can be pulled away from the bottom wall of the groove. Then, the relative position between the cleaning plate and the groove can be determined by using a fastener. When the cleaning plate is completely worn out, it can be replaced.

[0025] By setting up a telescopic rod, the slide rod moves synchronously along the slide groove during the compression or rebound of the elastic element. The movement of the slide rod along the slide groove can limit the movement direction of the elastic element and prevent the elastic element from undergoing elastic deformation, which would make it impossible to clamp the workpiece. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of a cleaning device for OCA optical adhesive according to this application;

[0027] Figure 2 This is a schematic diagram of the transmission system of this application;

[0028] Figure 3 This is a schematic diagram of the scraping system of this application;

[0029] Figure 4 This is a schematic diagram of the structure of the stabilizing component of this application;

[0030] Figure 5 This is a schematic diagram of the internal structure of the stable component in this application.

[0031] In the diagram, 1. Spraying system; 11. Conveying pipe; 12. Spraying pipe; 13. Water tank; 2. Scraping system; 21. Lifting plate; 211. Sleeve plate; 212. Inner plate; 213. Top screw; 22. Scraper; 3. Conveying system; 31. Conveying rod; 32. Balance rod; 33. Conveying ring; 34. Balance ring; 35. Conveying plate; 4. Support platform; 5. Driving component; 6. Cleaning plate; 7. Support rod; 8. Fixing component; 9. Stabilizing component; 91. Support block; 92. Elastic component; 93. Abutment block; 10. Telescopic rod; 101. Outer rod; 102. Slide rod; 20. First anti-detachment ring; 30. Second anti-detachment ring. Detailed Implementation

[0032] The present application will be further described in detail below with reference to the accompanying drawings.

[0033] Reference Figure 1 This embodiment provides a cleaning device for OCA optical adhesive, including a spray system 1, a scraping system 2, a conveying system 3, and a support platform 4. One end of the support platform 4 abuts against the working surface, and the other end of the support platform 4 is fixedly connected to the conveying system 3. The conveying system 3 is used to convey the workpiece to be cleaned. The spray system 1 is fixedly connected to the support platform 4 and is arranged opposite to the conveying system 3. The spray system 1 is used to spray cleaning agent onto the workpiece placed on the conveying system 3. Both ends of the scraping system 2 are fixedly connected to the support platform 4. There is a gap between the scraping system 2 and the conveying platform. The scraping system 2 is used to clean the adhesive on the surface of the workpiece.

[0034] Reference Figures 1-2 The conveying system 3 includes a conveying rod 31, a balance rod 32, a conveying ring 33, a balance ring 34, and a conveying plate 35. The surface of the support platform 4 has a conveying groove and a balance groove. The conveying rod 31 is installed in the conveying groove, with both ends rotatably connected to the groove. The balance rod 32 is installed in the balance groove, with both ends fixedly connected to the groove. The conveying ring 33 is sleeved on the outside of the conveying rod 31 and threadedly connected to it. The balance ring 34 is sleeved on the outside of the balance rod 32 and slides against it. The balance ring 34 and the conveying ring 33 are both fixedly connected to the conveying plate 35 at the ends away from the working surface. The conveying plate 35 is used to place the workpiece to be degummed. The conveying rod 31 is also provided with a driving component 5, which is preferably a motor. The output end of the driving component 5 is fixedly connected to the conveying rod 31. The driving component 5 can drive the conveying rod 31 to rotate. The rotation of the conveying rod 31 can drive the conveying ring 33 to move along the conveying rod 31. The movement of the conveying ring 33 can drive the conveying plate 35 to move, and thus the workpiece can move with the movement of the conveying plate 35.

[0035] Reference Figure 1The spraying system 1 includes a conveying pipe 11, a spraying pipe 12, and a water tank 13. Both the water tank 13 and the conveying pipe 11 are fixedly connected to the support platform 4. One end of the conveying pipe 11 is inserted into the bottom of the water tank 13, and the other end of the conveying pipe 11 is connected to the spraying pipe 12. The spraying holes of the spraying pipe 12 are set directly opposite the conveying plate 35. A water pump is also connected to the conveying pipe 11. In this embodiment, the water pump is preferably a water pump, and the water pump is a water pump built into the water pipe. The water pump is used to pump the spraying liquid inside the water tank 13 into the conveying pipe 11, so that the spraying liquid is sprayed onto the surface of the workpiece through the spraying holes on the spraying pipe 12. A support rod 7 is provided between the conveying pipe 11 and the support platform 4. One end of the support rod 7 is fixedly connected to the conveying pipe 11, and the other end of the support rod 7 is fixedly connected to the spraying pipe 12. The support rod 7 is used to limit the position of the spraying pipe 12.

[0036] Reference Figure 1 and Figure 3 The scraping system 2 includes a scraper 22 and two lifting plates 21. Two lifting plates 21 are provided, located on both sides of the support platform 4 and perpendicular to it. One end of each lifting plate 21 is fixedly connected to the support platform 4, and the other end is fixedly connected to both ends of the scraper 22. Each lifting plate 21 includes a sleeve plate 211 and an inner plate 212. The inner plate 212 is embedded within the sleeve plate 211 and is slidably connected to the sleeve plate 211. The sleeve plate 211 is located away from the inner plate 212. One end of the inner plate 212 is fixedly connected to the support platform 4, and the end of the inner plate 212 away from the support platform 4 is fixedly connected to the scraper 22. The sleeve plate 211 is threaded with a set screw 213, which passes through the side wall of the sleeve plate 211 and abuts against the inner plate 212. By adjusting the relative position between the inner plate 212 and the sleeve plate 211, the height of the lifting plate 21 can be adjusted. The change in the height of the lifting plate 21 can change the gap between the scraper 22 and the support platform 4, thereby enabling the device to perform degumming operations on workpieces of different thicknesses.

[0037] Reference Figure 3 The scraper 22 has a groove on one side near the support platform 4, and a cleaning plate 6 is embedded in the groove. In this embodiment, the cleaning plate 6 is preferably made of hard rubber. Fixing members 8 are provided on both sides of the groove. In this embodiment, the fixing members 8 are preferably fastening bolts. Each fixing member 8 is threaded to the side wall of the groove, and each fixing member 8 passes through the side wall of the groove and abuts against the cleaning plate 6.

[0038] Reference Figure 4Stabilizing components 9 are provided around the conveyor plate 35. In this embodiment, four stabilizing components 9 are provided, with one stabilizing component 9 provided on each side of the conveyor plate 35. Each stabilizing component 9 includes a support block 91, an elastic element 92, and an abutment block 93. The support block 91 is fixedly connected to the conveyor plate 35, and the abutment block 93 is slidably connected to the conveyor plate 35. The elastic element 92 is disposed between the support block 91 and the abutment block 93. The two ends of the elastic element 92 are fixedly connected to the support block 91 and the abutment block 93, respectively. The end of the abutment block 93 away from the elastic element 92 abuts against the conveyor plate 35. When a workpiece is placed on the conveyor plate 35, each elastic element 92 pushes towards the end closer to the workpiece, thereby causing each abutment block 93 to abut against the workpiece, thus completing the clamping of the workpiece.

[0039] Reference Figures 4-5 A telescopic rod 10 is provided between each abutment block 93 and elastic element 92. Each telescopic rod 10 includes an outer rod 101 and a sliding rod 102. One end of the outer rod 101 is fixedly connected to the support block 91, and a groove is opened at the end of the outer rod 101 away from the support block 91. One end of the sliding rod 102 is inserted into the groove, and the other end of the sliding rod 102 is fixedly connected to the abutment block 93. An anti-detachment component is also provided between the sliding rod 102 and the groove. The anti-detachment component includes a first anti-detachment ring 20 and a second anti-detachment ring 30. The first anti-detachment ring 20 is arranged around the opening of the groove and is fixedly connected to the side wall of the groove. The second anti-detachment ring 30 is arranged on the sliding rod 102. 02 is inserted into one end of the slide groove, and the second anti-detachment ring 30 is fixedly connected to the slide rod 102; during the compression or rebound of the elastic element 92, the slide rod 102 moves synchronously along the slide groove. The movement of the slide rod 102 along the slide groove can limit the movement direction of the elastic element 92, and prevent the elastic element 92 from undergoing elastic deformation, which would prevent it from being able to clamp the workpiece, and thus cause the workpiece to fall off during the conveying process on the conveyor plate 35, resulting in damage to the workpiece; because the first anti-detachment ring 20 and the second anti-detachment ring 30 are provided, when the first anti-detachment ring 20 and the second anti-detachment ring 30 abut, it is the maximum extension distance of the telescopic rod 10, which can prevent the slide rod 102 from falling off through the slide groove.

[0040] The implementation principle of the OCA optical adhesive cleaning equipment in this application embodiment is as follows: The workpiece is placed on the conveyor plate 35, and each abutment block 93 is pushed by the elastic element 92 to clamp the workpiece, so that the workpiece is fixedly connected to the conveyor plate 35; then the water pump is turned on, and the water pump draws the spray liquid inside the water tank 13 into the conveying pipe 11, and then the spray liquid is sprayed onto the surface of the workpiece through the spray holes on the spray pipe 12; then the drive 5 is turned on, and the drive 5 can drive the conveyor rod 31 to rotate. The rotation of the conveyor rod 31 can drive the conveyor ring 33 to move along the conveyor rod 31. The movement of the conveyor ring 33 can drive the conveyor plate 35 to move, and thus the workpiece can move with the movement of the conveyor plate 35. During the movement of the workpiece, the entire workpiece is sprayed with spray liquid; the workpiece continues to move until the workpiece abuts against the cleaning plate 6, and the cleaning plate 6 scrapes off the adhesive on the workpiece. After the above steps, the adhesive removal operation of the workpiece is completed.

[0041] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of the claims of this application.

Claims

1. A cleaning device for OCA optical adhesive, characterized in that: It includes a spraying system (1), a scraping system (2), a conveying system (3) and a support platform (4). One end of the support platform (4) is in contact with the working surface, and the other end of the support platform (4) is fixedly connected to the conveying system (3). The conveying system (3) is used to convey the workpiece to be cleaned. The spraying system (1) is fixedly connected to the support platform (4). The spraying system (1) and the conveying system (3) are set opposite each other. The spraying system (1) is used to spray the cleaning agent on the workpiece placed on the conveying system (3). Both ends of the scraping system (2) are fixedly connected to the support platform (4). There is a gap between the scraping system (2) and the conveying platform. The scraping system (2) is used to clean the glue on the surface of the workpiece. The conveying system (3) includes a conveying rod (31), a balance rod (32), a conveying ring (33), and a balance ring (34). The surface of the support platform (4) is provided with a conveying groove and a balance groove. The conveying rod (31) is set in the conveying groove, and both ends of the conveying rod (31) are rotatably connected to the conveying groove. The balance rod (32) is set in the balance groove, and both ends of the balance rod (32) are fixedly connected to the balance groove. The conveying ring (33) is sleeved on the outside of the conveying rod (31), and the conveying ring (33) is threadedly connected to the conveying rod (31). The balance ring (34) is sleeved on the outside of the balance rod (32), and the balance ring (34) is slidably connected to the balance rod (32). A conveying plate (35) is fixedly connected to the end of the balance ring (34) and the conveying ring (33) away from the working surface. The conveying plate (35) is used to place the workpiece to be degummed.

2. The cleaning equipment for OCA optical adhesive according to claim 1, characterized in that: The spray system (1) includes a conveying pipe (11), a spray pipe (12) and a water tank (13). The water tank (13) and the conveying pipe (11) are both fixedly connected to the support platform (4). One end of the conveying pipe (11) is inserted into the water tank (13), and the other end of the conveying pipe (11) is connected to the spray pipe (12). The spray holes of the spray pipe (12) are set facing the conveyor plate (35). A water pump is also connected to the conveying pipe (11).

3. The cleaning equipment for OCA optical adhesive according to claim 1, characterized in that: The scraping system (2) includes a scraper (22) and a lifting plate (21). There are two lifting plates (21). The two lifting plates (21) are located on both sides of the support platform (4) and are perpendicular to the support platform (4). One end of each lifting plate (21) is fixedly connected to the support platform (4), and the other end of each lifting plate (21) is fixedly connected to both ends of the scraper (22). Each lifting plate (21) includes a sleeve plate (211) and an inner plate (212). The inner plate (212) is embedded in the sleeve plate (211). The end of the sleeve plate (211) away from the inner plate (212) is fixedly connected to the support platform (4). The end of the inner plate (212) away from the support platform (4) is fixedly connected to the scraper (22). A set screw (213) is threaded on the sleeve plate (211). The set screw (213) passes through the side wall of the sleeve plate (211) and abuts against the inner plate (212).

4. The cleaning equipment for OCA optical adhesive according to claim 3, characterized in that: The scraper (22) is connected to a cleaning plate (6) on the side near the support platform (4), and the side of the cleaning plate (6) away from the scraper (22) abuts against the workpiece.

5. The cleaning equipment for OCA optical adhesive according to claim 4, characterized in that: The scraper (22) has a groove at one end near the cleaning plate (6), the cleaning plate (6) is embedded in the groove, and there are fixing parts (8) on both sides of the groove. Each fixing part (8) is threaded to the groove and passes through the side wall of the groove to abut against the cleaning plate (6).

6. The cleaning equipment for OCA optical adhesive according to claim 1, characterized in that: Stabilizing components (9) are provided around the conveyor plate (35). There are at least four stabilizing components (9). Each stabilizing component (9) includes a support block (91), an elastic element (92), and an abutment block (93). The support block (91) is fixedly connected to the conveyor plate (35), and the abutment block (93) is slidably connected to the conveyor plate (35). The elastic element (92) is disposed between the support block (91) and the abutment block (93). The two ends of the elastic element (92) are fixedly connected to the support block (91) and the abutment block (93) respectively. The end of the abutment block (93) away from the elastic element (92) abuts against the conveyor plate (35).

7. A cleaning device for OCA optical adhesive according to claim 6, characterized in that: A telescopic rod (10) is provided between each of the abutment blocks (93) and the elastic element (92). Each telescopic rod (10) includes an outer rod (101) and a sliding rod (102). One end of the outer rod (101) is fixedly connected to the support block (91). A sliding groove is provided at the end of the outer rod (101) away from the support block (91). One end of the sliding rod (102) is inserted into the sliding groove. The other end of the sliding rod (102) is fixedly connected to the abutment block (93). An anti-detachment component is also provided between the sliding rod (102) and the sliding groove.

8. The cleaning equipment for OCA optical adhesive according to claim 7, characterized in that: Each of the anti-detachment components includes a first anti-detachment ring (20) and a second anti-detachment ring (30). The first anti-detachment ring (20) is arranged around the opening of the slide groove and is fixedly connected to the slide groove. The second anti-detachment ring (30) is arranged at one end of the slide rod (102) inserted into the slide groove and is fixedly connected to the slide rod (102). When the slide rod (102) moves along the slide groove, when the first anti-detachment ring (20) and the second anti-detachment ring (30) abut, the maximum extension length between the slide rod (102) and the slide groove is limited.

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