Screen packaging equipment for LED touch display screen processing

Abstract

The application relates to the technical field of touch display screen assembly maintenance clamps, in particular to a screen packaging equipment for LED touch display screen processing, which comprises a base mechanism, a sliding sleeve assembly is arranged on the base mechanism, a driving locking mechanism is arranged on the sliding sleeve assembly, four oblique splines are arranged in the driving locking mechanism; a supporting frame is arranged on the base mechanism, a bearing frame is arranged in the supporting frame, a pressure bearing mechanism is arranged on the bearing frame, and a straight spline is arranged in the pressure bearing mechanism. When the touch display screen assembly is lowered, the gravity of the touch display screen assembly is converted so that the moving frame moves towards the bearing frame through cooperation of multiple components; the touch display screen assembly can be clamped and fixed through the action of the clamping plate assembly; and the position of the moving frame and the clamping plate assembly can be fully limited through cooperation of the oblique splines and the L-shaped inserting rod assembly, so that the clamping and fixing effect of the touch display screen assembly is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of touch display component maintenance fixtures, and more particularly to a screen packaging device for processing LED touch displays. Background Technology

[0002] LED displays are display devices made using light-emitting diode (LED) technology. Their main advantages include high brightness, vibrant colors, and energy efficiency. Common applications include billboards, television screens, scoreboards in stadiums, and stage backdrops. The manufacturing process of LED displays involves multiple steps. After the LED chips are soldered to the circuit board, sealant is evenly applied to the gaps in the housing. Then, the circuit board and housing are quickly assembled, and the gaps are sealed with sealant or sealing strips. Finally, a certain amount of pressure is applied by a pressing device to perform the pressing operation. In traditional LED display production, the installation and sealing of electrical components and housings are mostly done by individual assembly. Individual assembly is slow and cannot meet the needs of large-scale production. Secondly, LED lamps have different specifications, and the positioning devices on traditional production lines lack adaptability and adjustment capabilities. They cannot be adjusted according to the size and specifications of the lamp housing, increasing downtime caused by equipment changes. Furthermore, during rapid equipment changes and adjustments, operational errors or improper equipment debugging may occur, leading to unstable product quality and the risk of rework.

[0003] A screen packaging device for LED display processing, with announcement number CN121078867A, includes a base. A first side frame and a second side frame are respectively provided on both sides of the top of the base. An intermittent conveying component is provided in the second side frame, and seven moving frames are provided within the intermittent conveying component. Each of the seven moving frames is equipped with a multi-station synchronous positioning component. A positioning spacing adjustment component is provided in the first side frame, and a pressing component is provided on one side of the top of both the first and second side frames. This invention, by setting up a multi-station synchronous positioning component and an intermittent conveying component, enables the intermittent conveying component to drive multiple moving frames to move intermittently while simultaneously driving the multi-station synchronous positioning component to center and clamp multiple sets of display housings. Through this operation, the device achieves the effect of synchronously centering and positioning multiple housings during station switching, greatly shortening the processing time for multiple housings, improving overall production efficiency and product quality, and reducing production costs.

[0004] The above technical solution shortens the housing processing time by using a multi-station approach, but it cannot fully adapt to touch display components of different specifications, and it cannot ensure the stability after clamping, so it needs to be improved. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a screen packaging device for LED touch display processing.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A screen packaging device for processing LED touch display screens includes a base mechanism, a sliding component on the base mechanism, an active locking mechanism on the sliding component, and four helical racks inside the active locking mechanism; The base mechanism is provided with a support frame, a bearing frame is installed inside the support frame, a pressure-bearing mechanism is provided on the bearing frame, a straight rack is provided inside the pressure-bearing mechanism, and movable frames are slidably installed on all four sides of the bearing frame, with a clamping plate fixed on the side of the movable frame away from the bearing frame. Two movable blocks are slidably installed on the upper end of the movable frame. The two movable blocks are located between the clamping plate and the bearing frame. A first spring is fixed between the bearing frame and one of the movable blocks, between the two movable blocks, and between the other movable block and the clamping plate. A connecting shaft is rotatably sleeved on both sides of the movable block. A bearing shaft is rotatably sleeved on the connecting shaft. Multiple rotating shafts are rotatably sleeved at equal intervals inside the bearing frame. The upper end of the bearing frame and the upper end of the rotating shaft are located in the same horizontal plane, and the upper end of the clamping plate is higher than the upper end of the bearing frame. A flipping mechanism is provided on one side of the rack, and the flipping mechanism is connected to the movable frame.

[0007] Compared with the prior art, this application converts the gravity of the touch display assembly when it descends so that the moving frame moves toward the support frame through the cooperation of multiple components. The clamping plate can clamp the touch display assembly, and the cooperation of the inclined rack and L-shaped insert can fully limit the position of the moving frame and the clamping plate, thereby ensuring the clamping effect of the touch display assembly.

[0008] Preferably, the first spring member has a limiting rod extending through both ends, and the six limiting rods located on the same side are respectively fixed to the two ends of the two moving blocks and the opposite side of the clamping plate and the bearing frame.

[0009] Furthermore, the limiting rod helps to limit the extension and retraction direction of the first spring member, which helps to prevent the first spring member from deflecting when compressed and contracted, so as to ensure that the first spring member can fully apply the opposite force to the components at both ends.

[0010] Preferably, the base mechanism includes a movable base, a hydraulic cylinder assembly is mounted on the upper end of the movable base, the piston rod of the hydraulic cylinder assembly is fixed to the lower end of the support frame, and a control box assembly is mounted on one side of the upper end of the movable base. The sliding sleeve is slidably fitted onto the hydraulic cylinder assembly.

[0011] Furthermore, the movable base facilitates movement, while the hydraulic cylinder assembly allows the support frame to be raised and lowered, making it easier to contact the lower end of the touch display assembly and raise and lower the touch display assembly so that it can be placed inside the packaging assembly for packaging operations.

[0012] Preferably, the active locking mechanism includes a pedal component fixed to one side of the sliding assembly, and a return spring component is fixed between the pedal component and the base mechanism; The movable frame is provided with a helical rack on one side, and L-shaped inserts are rotatably connected to all four sides of the bearing frame. One end of the L-shaped insert extends into the helical rack on the same side. The L-shaped insert and the sliding assembly are universally connected by a tie rod.

[0013] Furthermore, when the moving frame moves towards the load-bearing frame, the L-shaped insert can move against the arc-shaped edge of the ratchet teeth inside the helical rack. When one end of the L-shaped insert aligns with the horizontal end of the ratchet teeth inside the helical rack, it will be inserted between the two ratchet teeth again. The ratchet teeth ensure that the L-shaped insert can only deflect when the moving frame moves towards the load-bearing frame, and cannot move the moving frame away from the load-bearing frame; thus achieving the purpose of linkage locking. When maintenance is complete, lifting the pedal causes the L-shaped insert to flip, separating the L-shaped insert from the helical rack and allowing the moving frame to move away from the load-bearing frame.

[0014] Preferably, the pressure-bearing mechanism includes four mounting slots opened on the upper end of the bearing frame, the four mounting slots are respectively arranged on one side of the four movable frames, a sliding rod is slidably installed in the mounting slot, an abutment plate is fixed at the upper end of the sliding rod, and the straight rack is fixed on one side of the sliding rod; The upper end of the contact plate is higher than the upper end of the support frame.

[0015] Furthermore, as the touch display assembly descends, it presses against the contact plate, causing the contact plate to push the slide bar downwards, which in turn drives the flipping mechanism to operate, providing power for the moving frame to move towards the load-bearing frame.

[0016] Preferably, the flipping mechanism includes a gear meshing with one side of a spur rack, an L-shaped shaft rotatably sleeved on one side of the gear, the L-shaped shaft being fixedly connected to the lower end of the bearing frame, a rocker arm fixed to one side of the gear, a diagonal tie rod fixed to the lower end of the rocker arm, a push block rotatably connected to the upper end of the diagonal tie rod, the push block being slidably mounted on one side of the movable frame, and a second spring being fixed together between the push block and the movable frame.

[0017] Furthermore, when the sliding rod drives the rack to descend, it causes the rack to drive the gear to rotate, which in turn causes the gear to drive the rocker arm to rotate. The rotation of the rocker arm causes the diagonal tie rod to move, so that the diagonal tie rod pulls the moving frame toward the bearing frame. At the same time, the cooperation of the second spring and the push block allows other positions to move when the clamping plate contacts the touch display assembly.

[0018] Preferably, a connecting frame is fixed to one of the movable frames on the side away from the support frame, and a detection component is installed at one end of the connecting frame.

[0019] Furthermore, the testing component can be connected to the touch display component to facilitate understanding of the packaging effect.

[0020] Preferably, both the rotating shaft and the bearing shaft are fitted with rubber sleeves.

[0021] Furthermore, it helps protect the touch display components.

[0022] Preferably, an encapsulation component is provided at the upper end of the carrier frame.

[0023] Furthermore, the LED touch display screen is encapsulated using packaging components.

[0024] The beneficial effects of this invention are: 1. In actual operation, the pivot components on the support frame can be ball bearing components, which can easily adapt to the multi-directional movement of the touch screen assembly; 2. When the sliding rod drives the rack to descend, it causes the rack to drive the gear to rotate, which in turn drives the swing rod to rotate. The rotation of the swing rod causes the diagonal tie rod to move, so that the diagonal tie rod pulls the moving frame toward the bearing frame. Meanwhile, through the cooperation of the second spring and the push block, other positions can also be moved when the clamping plate abuts against the touch display assembly; the gravity of the touch display assembly is converted so that the moving frame can move towards the support frame through the cooperation of multiple parts, and the touch display assembly can be clamped by the action of the clamping plate. 3. When the moving frame moves towards the load-bearing frame, the L-shaped insert rod moves against the arc-shaped edge of the ratchet teeth inside the helical rack. When one end of the L-shaped insert rod aligns with the horizontal end of the ratchet teeth inside the helical rack, it will insert itself between the two ratchet teeth again. The ratchet teeth ensure that the L-shaped insert rod can only deflect when the moving frame moves towards the load-bearing frame, and cannot move the moving frame away from the load-bearing frame; thus achieving the purpose of linkage locking. When maintenance is complete, lifting the pedal component causes the L-shaped insert to flip, which separates the L-shaped insert from the helical rack, allowing the moving frame to move away from the load-bearing frame. 4. The hydraulic cylinder assembly enables the carrier frame to be raised and lowered; allowing the touch display assembly to enter the packaging assembly to complete the packaging operation; the packaging assembly is fixedly connected to the mounting rack in the workshop. Attached Figure Description

[0025] Figure 1 This is a structural diagram of the present invention; Figure 2 This is a structural diagram of the support frame of the present invention; Figure 3 This is a connection structure diagram of the movable frame and clamping plate in this invention; Figure 4 Appendix to this invention Figure 2 Enlarged view of point A; Figure 5 Appendix to this invention Figure 2 Enlarged view of point B; Figure 6 This is a connection structure diagram of the gear component and the rocker arm component in this invention; Figure 7 This is a connection structure diagram of the sliding assembly and the pedal component in this invention; In the diagram: 1. Movable base; 2. Hydraulic cylinder assembly; 3. Control box assembly; 4. Support frame; 5. Connecting frame; 6. Detection assembly; 7. Bearing frame; 8. Mounting slot; 9. Rotary shaft; 10. Moving frame; 11. Clamping plate; 12. Diagonal tie rod; 13. Connecting shaft; 14. Moving block; 15. Bearing shaft; 16. Rubber sleeve; 17. First spring; 18. Sliding rod; 19. Gear; 20. Swing rod; 21. L-shaped shaft; 22. Straight rack; 23. Helical rack; 24. Tie rod; 25. L-shaped insert rod; 26. Pedal; 27. Reset spring; 28. Sliding assembly; 29. ​​Limiting rod; 30. Contact plate; 31. Second spring; 32. Push block; 33. Encapsulation assembly. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] Reference Figures 1-7An LED touch display screen packaging device includes a base mechanism with a sliding component 28 and an active locking mechanism. The active locking mechanism contains four inclined racks 23. A support frame 4 is mounted on the base mechanism, and a bearing frame 7 is installed within the support frame 4. A packaging component 33 is mounted on the upper end of the bearing frame 7 for packaging the LED touch display screen. A pressure-bearing mechanism is mounted on the bearing frame 7, and a straight rack 22 is installed within the pressure-bearing mechanism. Movable frames 10 are slidably mounted on all four sides of the bearing frame 7, and a clamping plate 11 is fixed to the side of the movable frame 10 away from the bearing frame 7. The base mechanism facilitates movement and actively adapts to the position of the touch display screen component, enabling quick and easy loading of the touch display screen component. It also actively locks during clamping, ensuring the quality of the clamping of the touch display screen component.

[0028] In this embodiment, two movable blocks 14 are slidably mounted on the upper end of the movable frame 10. The two movable blocks 14 are located between the clamping plate 11 and the bearing frame 7. First spring members 17 are fixed between the bearing frame 7 and one of the movable blocks 14, between the two movable blocks 14, and between the other movable block 14 and the clamping plate 11. Connecting shafts 13 are rotatably sleeved on both sides of the movable blocks 14. Bearing shafts 15 are rotatably sleeved on the connecting shafts 13. Multiple rotating shafts 9 are rotatably sleeved at equal intervals inside the bearing frame 7. The upper end of the bearing frame 7 and the upper end of the rotating shafts 9 are located in the same horizontal plane. The upper end of 1 is higher than the upper end of the support frame 7; a flipping mechanism is provided on one side of the rack 22, and the flipping mechanism is connected to the moving frame 10; the flipping mechanism can convert the gravity of the touch display assembly into a pulling force on the moving frame 10 when the touch display assembly is lowered, so that the moving frame 10 can drive the clamping plate 11 to move towards the support frame 7. Through the action of the support shaft 15, it is easy to move against the lower end of the touch display assembly. At the same time, in actual operation, the rotating shaft 9 on the support frame 7 can be a ball bearing component, which is convenient to adapt to the multi-directional movement of the touch display assembly.

[0029] In this embodiment, limiting rods 29 are provided through both ends of the first spring member 17. The six limiting rods 29 located on the same side are respectively fixed to the two ends of the two moving blocks 14 and the opposite side of the clamping plate member 11 and the bearing frame 7. The limiting rods 29 help to limit the extension and retraction direction of the first spring member 17, and help to prevent the first spring member 17 from deflecting when compressed and contracted, so as to ensure that the first spring member 17 can fully apply the opposite force to the components at both ends.

[0030] In this embodiment, the base mechanism includes a movable base 1, a hydraulic cylinder assembly 2 is installed on the upper end of the movable base 1, the piston rod of the hydraulic cylinder assembly 2 is fixed to the lower end of the support frame 4, and a control box assembly 3 is installed on one side of the upper end of the movable base 1. The operation of the automated components in this application can be controlled through the control box assembly 3. The sliding assembly 28 is slidably fitted onto the hydraulic cylinder assembly 2; it is easy to move via the movable base 1, and the hydraulic cylinder assembly 2 can raise and lower the support frame 7, so that after supporting the touch screen assembly, it can push the touch screen assembly up and put it into the encapsulation assembly 33 to complete the encapsulation operation; the encapsulation assembly 33 is fixedly connected to the mounting rack in the workshop.

[0031] In this embodiment, the active locking mechanism includes a pedal component 26 fixed to one side of the sliding component 28, and a return spring component 27 is fixed between the pedal component 26 and the base mechanism. A helical rack 23 is provided on one side of the movable frame 10, and L-shaped inserts 25 are rotatably connected to all four sides of the bearing frame 7. One end of the L-shaped insert 25 extends into the helical rack 23 on the same side. The L-shaped insert 25 and the sliding assembly 28 are universally connected by a pull rod 24. When the movable frame 10 moves toward the bearing frame 7, the L-shaped insert 25 moves against the arc-shaped edge of the ratchet teeth inside the helical rack 23. When one end of the L-shaped insert 25 corresponds to the horizontal end of the ratchet teeth inside the helical rack 23, it will be inserted between the two ratchet teeth again. The ratchet teeth ensure that the L-shaped insert 25 can only deflect when the movable frame 10 moves toward the bearing frame 7, and cannot move the movable frame 10 away from the bearing frame 7; thus achieving the purpose of linkage locking. When maintenance is complete, lifting the pedal 26 causes the L-shaped insert 25 to flip, which separates the L-shaped insert 25 from the helical rack 23, allowing the moving frame 10 to move away from the load-bearing frame 7.

[0032] In this embodiment, the pressure-bearing mechanism includes four mounting slots 8 opened on the upper end of the bearing frame 7. The four mounting slots 8 are respectively set on one side of the four movable frames 10. A sliding rod 18 is slidably installed in the mounting slot 8. A contact plate 30 is fixed at the upper end of the sliding rod 18. A straight rack 22 is fixed on one side of the sliding rod 18. The upper end of the contact plate 30 is higher than the upper end of the support frame 7; when the touch display assembly descends, it will squeeze the contact plate 30, causing the contact plate 30 to push the slide bar 18 down, which can drive the flipping mechanism to operate, so as to provide power for the moving frame 10 to move towards the support frame 7.

[0033] In this embodiment, the flipping mechanism includes a gear 19 meshing with one side of the rack 22. An L-shaped shaft 21 is rotatably sleeved on one side of the gear 19. The L-shaped shaft 21 is fixedly connected to the lower end of the support frame 7. A rocker arm 20 is fixed to one side of the gear 19. A diagonal pull rod 12 is fixed to the lower end of the rocker arm 20. A push block 32 is rotatably connected to the upper end of the diagonal pull rod 12. The push block 32 is slidably mounted on one side of the movable frame 10. A second spring 31 is fixed between the push block 32 and the movable frame 10. When the sliding rod 18 drives the rack 22 to descend, the rack 22 drives the gear 19 to rotate, which in turn drives the rocker arm 20 to rotate. The rotation of the rocker arm 20 drives the diagonal pull rod 12 to move, so that the diagonal pull rod 12 pulls the movable frame 10 toward the support frame 7. Meanwhile, through the cooperation of the second spring 31 and the push block 32, when the clamping plate 11 abuts against the touch display assembly, other positions can also move. When the diagonal tie rod 12 pulls the push block 32, the push block 32 applies pressure to the moving frame 10 through the second spring 31, causing the moving frame 10 to move towards the bearing frame 7. When the clamping plate 11 and the touch display assembly abut against each other and cannot move, the diagonal tie rod 12 can still drive the push block 32 to squeeze the second spring 31, so that the clamping plate 11 and the touch display assembly in other positions can abut against each other.

[0034] In this embodiment, a connecting frame 5 is fixed on the side of one of the movable frames 10 away from the support frame 7, and a detection component 6 is installed at one end of the connecting frame 5; the detection component 6 can be connected to the touch display component to facilitate the detection of the packaging status of the touch display component.

[0035] In this embodiment, rubber sleeves 16 are fitted on both the pivot 9 and the bearing shaft 15; this helps to protect the touch display assembly.

[0036] In this invention, the flipping mechanism, after the touch display assembly enters the support frame 7, works with the pressure bearing mechanism to convert the gravity of the touch display assembly into a pulling force on the moving frame 10, so that the moving frame 10 drives the clamping plate 11 to move towards the support frame 7. Through the action of the support shaft 15, it is easy to move against the lower end of the touch display assembly. At the same time, in actual operation, the rotating shaft 9 on the support frame 7 can be a ball bearing component, which is convenient to adapt to the multi-directional movement of the touch display assembly. When the clamping plate 11 moves toward and clamps the touch display assembly, the active locking mechanism will lock in action to ensure the quality of clamping the touch display assembly. The hydraulic cylinder assembly 2 can push the carrier frame 7 up, so that it enters the packaging assembly 33 to complete the packaging operation; the packaging assembly 33 is fixedly connected to the mounting rack in the workshop.

[0037] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A screen packaging device for processing LED touch displays, comprising a base mechanism, characterized in that: The base mechanism is provided with a sliding component (28), the sliding component (28) is provided with an active locking mechanism, and the active locking mechanism is provided with four helical racks (23). The base mechanism is provided with a support frame (4), and a bearing frame (7) is installed inside the support frame (4). The bearing frame (7) is provided with a pressure bearing mechanism, and a straight rack (22) is provided inside the pressure bearing mechanism. A movable frame (10) is slidably installed on all four sides of the bearing frame (7). A clamping plate (11) is fixed on the side of the movable frame (10) away from the bearing frame (7). Two movable blocks (14) are slidably installed on the upper end of the movable frame (10). The two movable blocks (14) are located between the clamping plate (11) and the bearing frame (7). A first spring (17) is fixed between the bearing frame (7) and one of the movable blocks (14), between the two movable blocks (14), and between the other movable block (14) and the clamping plate (11). A connecting shaft (13) is rotatably sleeved on both sides of the movable block (14). A bearing shaft (15) is rotatably sleeved on the connecting shaft (13). Multiple rotating shafts (9) are rotatably sleeved at equal intervals inside the bearing frame (7). The upper end of the bearing frame (7) and the upper end of the rotating shaft (9) are located in the same horizontal plane, and the upper end of the clamping plate (11) is higher than the upper end of the bearing frame (7). The rack (22) is provided with a flipping mechanism on one side, and the flipping mechanism is connected to the moving frame (10).

2. The screen packaging equipment for LED touch display processing according to claim 1, characterized in that: The first spring member (17) has a limit rod (29) through both ends. The six limit rods (29) on the same side are fixed to the two ends of the two moving blocks (14) and the opposite side of the clamping plate (11) and the bearing frame (7).

3. The screen packaging equipment for LED touch display processing according to claim 1, characterized in that: The base mechanism includes a movable base (1), a hydraulic cylinder assembly (2) is installed on the upper end of the movable base (1), the piston rod of the hydraulic cylinder assembly (2) is fixed to the lower end of the support frame (4), and a control box assembly (3) is installed on one side of the upper end of the movable base (1). The sliding sleeve (28) is slidably fitted onto the hydraulic cylinder assembly (2).

4. The screen packaging equipment for LED touch display processing according to claim 1, characterized in that: The active locking mechanism includes a pedal component (26) fixed to one side of the slide assembly (28), and a return spring component (27) is fixed between the pedal component (26) and the base mechanism. The movable frame (10) is provided with a helical rack (23) on one side, and the four sides of the bearing frame (7) are rotatably connected with L-shaped inserts (25). One end of the L-shaped insert (25) extends into the helical rack (23) on the same side. The L-shaped insert (25) and the sliding kit (28) are universally connected with a pull rod (24).

5. The screen packaging equipment for LED touch display processing according to claim 1, characterized in that: The pressure-bearing mechanism includes four mounting slots (8) opened on the upper end of the bearing frame (7). The four mounting slots (8) are respectively set on one side of the four movable frames (10). A sliding rod (18) is slidably installed in the mounting slot (8). A contact plate (30) is fixed at the upper end of the sliding rod (18). The straight rack (22) is fixed on one side of the sliding rod (18). The upper end of the contact plate (30) is higher than the upper end of the support frame (7).

6. The screen packaging equipment for LED touch display processing according to claim 1, characterized in that: The flipping mechanism includes a gear (19) meshing with one side of a rack (22), an L-shaped shaft (21) rotatably sleeved on one side of the gear (19), the L-shaped shaft (21) being fixedly connected to the lower end of the bearing frame (7), a rocker arm (20) being fixedly fixed on one side of the gear (19), a diagonal tie rod (12) being fixedly fixed at the lower end of the rocker arm (20), a push block (32) being rotatably connected to the upper end of the diagonal tie rod (12), the push block (32) being slidably mounted on one side of the moving frame (10), and a second spring (31) being fixed together between the push block (32) and the moving frame (10).

7. The screen packaging equipment for LED touch display processing according to claim 1, characterized in that: One of the movable frames (10) is fixed with a connecting frame (5) on the side away from the bearing frame (7), and a detection component (6) is installed at one end of the connecting frame (5).

8. The screen packaging equipment for LED touch display processing according to claim 1, characterized in that: Both the rotating shaft (9) and the bearing shaft (15) are fitted with rubber sleeves (16).

9. The screen packaging equipment for LED touch display processing according to claim 1, characterized in that: An encapsulation component (33) is provided at the upper end of the carrier frame (7).

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