Safety escalator

Abstract

The utility model discloses a safety escalator and aims to overcome the defect that potential safety hazards exist due to the fact that an overground swimming pool matched escalator is not provided with a safety protection device and children can go in and out of a swimming pool through the escalator when no one uses the swimming pool. The escalator comprises an inner escalator frame and an outer escalator frame, pedals are arranged on the inner escalator frame and the outer escalator frame, a protective curtain capable of being rolled up is installed on the outer escalator frame, and the protective curtain shields the pedals on the outer escalator frame. According to the safety escalator, the part, extending out of a swimming pool, of the escalator is protected, and potential safety hazards caused by the fact that children enter the swimming pool without adult monitoring are avoided.

Description

Technical Field

[0001] This utility model relates to a swimming pool ladder, and more specifically, to a safety escalator. Background Technology

[0002] After the above-ground swimming pool is installed, it is at a certain height from the ground. To facilitate access for users, escalators need to be installed around the pool. Most commonly seen above-ground swimming pool escalators are figure-eight shaped, with one side of the escalator extending outside the pool and the other side extending into it. The portion of the escalator extending outside lacks safety protection. Because the pool water is relatively deep, there is a safety hazard if children use the escalator to enter or exit the pool when it is not in use. Utility Model Content

[0003] To overcome the above shortcomings, this utility model provides a safety escalator that provides safety protection for the part of the escalator that extends outside the swimming pool, preventing children from entering the pool without adult supervision and causing safety hazards.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a safety escalator, including an inner escalator frame and an outer escalator frame, both the inner and outer escalator frames are provided with treads, and a retractable protective curtain is installed on the outer escalator frame, the protective curtain covering the treads on the outer escalator frame.

[0005] This patent application describes a safety ladder designed for use with above-ground swimming pools. The inner ladder frame is located inside the pool, while the outer ladder frame is located outside. When the pool is not in use, a safety curtain covers the steps on the outer ladder frame to prevent children from entering the pool without adult supervision and causing safety hazards. When the pool is in normal use, the safety curtain is rolled up, exposing the steps on the outer ladder frame, allowing users to climb into the pool.

[0006] This patented safety escalator provides safety protection for the portion of the escalator extending outside the swimming pool, preventing children from entering the pool without adult supervision and causing safety hazards.

[0007] As a preferred option, sliding guide grooves are provided on both sides of the external escalator frame. The sliding guide grooves are located in front of the steps, and the two sides of the protective curtain are respectively slidably adapted to the two sliding guide grooves.

[0008] The protective curtain is fitted with two sliding guide grooves on both sides. During the lowering and raising of the curtain, the two sides slide smoothly and reliably along the two sliding guide grooves. Moreover, the sliding guide grooves limit the movement of the protective curtain on both sides, preventing it from being pulled outwards.

[0009] As a preferred option, storage guide grooves are provided on both sides of the external escalator frame. The storage guide grooves are located behind the steps, and the upper ends of the storage guide grooves and the upper ends of the sliding guide grooves are connected to form an inverted U-shaped slide groove. The protective curtains slide along the slide grooves on both sides.

[0010] When the safety escalator is in normal use, pull the safety curtain upwards from the top of the sliding guide rail and then downwards into the storage guide rail, so that the safety curtain is stored in the storage guide rail behind the tread, thus exposing the tread for easy use. The upper end of the storage guide rail and the upper end of the sliding guide rail are connected to form an inverted U-shaped slide rail, which facilitates the pulling of the safety curtain.

[0011] Preferably, the external escalator frame includes two external ladder side plates, and sliding guide grooves and storage guide grooves are provided on the opposite surfaces of the two external ladder side plates.

[0012] Two sliding grooves are respectively set on the opposite surfaces of the two outer ladder side panels, so that the protective curtain is limited between the two outer ladder side panels and the protective curtain is prevented from detaching.

[0013] Another option is to connect the inner and outer escalator frames with a top plate, and connect the top plate with protective plates on both sides. A winding groove is set on the opposite surface of the two protective plates. One end of the winding groove is connected to the upper end of the sliding guide groove, and the other end of the winding groove is wound inward. The protective curtain slides into the winding groove on both sides to achieve winding.

[0014] When the safety escalator is in normal use, pull the safety curtain upwards from the top of the sliding guide groove and then pull it up along the winding groove until the entire safety curtain is rolled up and placed below the top plate. This exposes the steps for easy use.

[0015] As a preferred option, a sliding locking device is installed on the external escalator frame, and a limiting groove is provided on the protective curtain. The locking device is inserted into the limiting groove to achieve positioning and locking of the protective curtain.

[0016] After the protective curtain slides into place, the moving locking component engages with the limiting groove to lock the protective curtain in place.

[0017] As a preferred embodiment, an installation groove is provided on the external escalator frame, a locking component is slidably connected to the installation groove, a positioning protrusion is provided on the locking component, and a positioning recess is provided on the side wall of the installation groove. The positioning protrusion and the positioning recess are engaged together to achieve positioning.

[0018] The locking element slides smoothly and reliably within the mounting groove. After the locking element is in place, the positioning protrusion and the positioning recess engage together to lock the element in place, preventing it from moving and ensuring reliable positioning of the protective curtain.

[0019] Preferably, the locking element is provided with a spring clip, and the side wall of the mounting groove is provided with a recessed groove, with the end of the spring clip being engaged in the recessed groove.

[0020] The locking element is limited by a spring-loaded latch and a mounting slot to prevent it from disengaging from the mounting slot.

[0021] Preferably, the locking element is provided with a movable locking hole, the outer escalator frame is provided with a fixed locking hole, and a protective lock is connected between the movable locking hole and the fixed locking hole.

[0022] After the safety curtain slides down to its designated position, it blocks the steps on the outer escalator frame. Then, the locking mechanism is slid down until it engages with the limiting groove on the safety curtain. At this point, the positioning protrusion and positioning recess engage to achieve positioning and locking. Finally, the safety lock is passed through the movable and fixed lock holes and locked, thus achieving complete protection. The safety curtain can only be moved after the safety lock is opened with a key, ensuring safety and reliability.

[0023] Preferably, the protective curtain is an integral structure with several hollow reinforcing ribs spaced apart on it; or, the protective curtain includes several connecting strips connected in sequence, with a connecting post on one side of the connecting strip and a connecting groove on the other side, and adjacent connecting strips are rotatably connected by the connecting post and the connecting groove.

[0024] The integrated protective curtain has good overall integrity. The protective curtain, formed by connecting several strips, is easy to manufacture.

[0025] Compared with the prior art, the beneficial effects of this utility model are: (1) The safety escalator of this patent provides safety protection for the part of the escalator that extends outside the pool, so as to avoid children entering the pool without adult supervision and causing safety hazards; (2) The protective curtain is reliably positioned and has a good protective effect; (3) The protective curtain has a variety of different storage methods, which are flexible and convenient. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this utility model.

[0027] Figure 2 This is a schematic diagram of the protective curtain connection in Embodiment 1 of this utility model.

[0028] Figure 3 This is a schematic diagram of the locking component connection in Embodiment 1 of this utility model.

[0029] Figure 4 This is a schematic diagram of the structure of Embodiment 2 of this utility model.

[0030] Figure 5 This is a schematic diagram of the protective curtain connection in Embodiment 2 of this utility model.

[0031] Figure 6 This is a schematic diagram of the structure of a protective curtain according to this utility model.

[0032] Figure 7This is another structural schematic diagram of the protective curtain of this utility model.

[0033] In the diagram: 1. Inner escalator frame, 2. Outer escalator frame, 3. Top plate, 4. Handrail, 5. Step, 6. Safety curtain, 7. Inner side plate, 8. Outer side plate, 9. Support base plate, 10. Sliding guide groove, 11. Storage guide groove, 12. Locking element, 13. Limiting groove, 14. Installation groove, 15. Positioning protrusion, 16. Positioning recess, 17. Spring buckle, 18. Recessed groove, 19. Notch groove, 20. Movable lock hole, 21. Fixed lock hole, 22. Safety lock, 23. Reinforcing rib tube, 24. Lifting part, 25. Lifting opening, 26. Safety plate, 27. Rewinding groove, 28. Connecting strip, 29. Connecting column, 30. Connecting groove, 31. Extension strip. Detailed Implementation

[0034] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0035] Example 1: A safety escalator (see appendix) Figure 1 Appendix Figure 2 Appendix Figure 3 The system includes an inner escalator frame 1 and an outer escalator frame 2. A top plate 3 connects the inner escalator frame 1 and the outer escalator frame 2, forming an "eight"-shaped structure. Handrails 4 are installed on both the left and right sides of the top plate 3. Anti-slip textures are provided on the upper surface of the top plate 3. Steps 5 are installed on both the inner escalator frame 1 and the outer escalator frame 2. Anti-slip textures are provided on the surface of the steps 5. A retractable protective curtain 6 is installed on the outer escalator frame 2, which covers the steps 5 on the outer escalator frame 2.

[0036] The inner escalator frame 1 includes two opposing inner escalator side panels 7, with several treads 5 spaced apart between the two inner escalator side panels 7. The outer escalator frame 2 includes two outer escalator side panels 8, with several treads 5 spaced apart between the two outer escalator side panels 8. Both the lower ends of the inner escalator frame 1 and the outer escalator frame 2 are equipped with support base plates 9. These support base plates 9 increase the support area, thereby improving the stability of the entire escalator.

[0037] Sliding guide grooves 10 are provided on both sides of the outer escalator frame 2. The sliding guide grooves 10 are located in front of the tread 5, and the protective curtain 6 is slidably adapted to the two sliding guide grooves 10 on both sides. The lower end of the sliding guide groove 10 is located at the lower part of the outer escalator frame 2. Receiving guide grooves 11 are provided on both sides of the outer escalator frame 2. The receiving guide grooves 11 are located behind the tread 5. The upper end of the receiving guide groove 11 and the upper end of the sliding guide groove 10 are connected to form an inverted U-shaped slide groove. The protective curtain 6 slides along the slide groove on both sides. Sliding guide grooves 10 and receiving guide grooves 11 are provided on the opposite surfaces of the two outer escalator side plates 8. The inverted U-shaped slide groove formed by the connection of the receiving guide groove 11 and the sliding guide groove 10 facilitates the sliding of the protective curtain 6. The distance between the two outer escalator side plates 8 is less than the width of the protective curtain 6, thereby preventing the protective curtain 6 from detaching from the slide groove.

[0038] A sliding locking element 12 is installed on the outer escalator frame 2. A limiting groove 13 is provided on the protective curtain 6, located on the side of the protective curtain 6 and close to the upper part of the curtain 6. The locking element 12 is inserted into the limiting groove 13 to lock the protective curtain 6. An installation groove 14 is provided on the outer escalator frame 2, located on one of the outer ladder side plates 8. The locking element 12 is slidably connected to the installation groove 14. Positioning protrusions 15 are provided on both sides of the locking element 12. Two positioning recesses 16 are provided on both sides of the installation groove 14, spaced vertically. The positioning protrusions 15 and positioning recesses 16 are engaged together to achieve positioning. A spring buckle 17 is provided on the locking element 12, and a recessed groove 18 is provided on the side wall of the installation groove 14. The end of the spring buckle 17 is engaged in the recessed groove 18. The locking element 12 has notches 19 on both sides, and spring clips 17 are provided at each notch 19. The mounting groove 14 has recessed grooves 18 on both opposite side walls. The two spring clips 17 are respectively engaged with the two recessed grooves 18 to prevent the locking element 12 from disengaging from the mounting groove 14. The locking element 12 has a movable locking hole 20, and the outer escalator frame 2 has a fixed locking hole 21. A protective lock 22 connects the movable locking hole 20 and the fixed locking hole 21. The locking element 12 has a movable lug, and the movable locking hole 20 is located on the movable lug. The outer escalator frame 2 has a fixed lug, and the fixed locking hole 21 is located on the fixed lug.

[0039] After the protective curtain 6 slides down into position, it covers the step 5 on the outer escalator frame 2. Then, the locking element 12 is slid down and engages with the limiting groove 13 on the protective curtain 6. At this point, the positioning protrusion 15 and the positioning recess 16 engage together to achieve positioning and locking. Then, the protective lock 22 is passed through the movable lock hole 20 and the fixed lock hole 21 and locked, thus achieving a complete protection effect. The protective curtain 6 can only be moved after the protective lock 22 is opened with a key, ensuring safety and reliability.

[0040] like Figure 6The protective curtain 6 shown is a flexible, integrated structure, with several hollow reinforcing ribs 23 spaced apart on it. A lifting section 24 is provided at the upper end of the protective curtain 6, and a lifting opening 25 is provided on the lifting section 24.

[0041] This patent application describes a safety ladder designed for use with above-ground swimming pools. The inner ladder frame 1 is positioned inside the pool, while the outer ladder frame 2 is positioned outside. When the pool is not in use, a safety curtain 6 covers the steps 5 on the outer ladder frame 2 to prevent children from entering the pool without adult supervision and causing safety hazards. When the pool is in normal use, the safety curtain 6 is rolled up, exposing the steps 5 on the outer ladder frame 2, allowing users to climb into the pool using the steps 5.

[0042] Example 2: A safety escalator (see appendix) Figure 4 Appendix Figure 5 The system includes an inner escalator frame 1 and an outer escalator frame 2. A top plate 3 connects the inner escalator frame 1 and the outer escalator frame 2, forming an "eight"-shaped structure. Handrails 4 are installed on both the left and right sides of the top plate 3. Anti-slip textures are provided on the upper surface of the top plate 3. Steps 5 are installed on both the inner escalator frame 1 and the outer escalator frame 2. Anti-slip textures are provided on the surface of the steps 5. A retractable protective curtain 6 is installed on the outer escalator frame 2, which covers the steps 5 on the outer escalator frame 2.

[0043] The inner escalator frame 1 includes two opposing inner escalator side panels 7, with several treads 5 spaced apart between the two inner escalator side panels 7. The outer escalator frame 2 includes two outer escalator side panels 8, with several treads 5 spaced apart between the two outer escalator side panels 8. Both the lower ends of the inner escalator frame 1 and the outer escalator frame 2 are equipped with support base plates 9. These support base plates 9 increase the support area, thereby improving the stability of the entire escalator.

[0044] Sliding guide grooves 10 are provided on both sides of the outer escalator frame 2. The sliding guide grooves 10 are located in front of the tread 5, and the protective curtain 6 is slidably adapted to the two sliding guide grooves 10 on both sides. The lower end of the sliding guide groove 10 is located at the lower part of the outer escalator frame 2.

[0045] Both sides of the top plate 3 are connected to protective plates 26. Each of the opposing surfaces of the two protective plates 26 has a winding groove 27. One end of the winding groove 27 connects to the upper end of the sliding guide groove 10, and the other end of the winding groove 27 is wound inwards into a multi-turn oval shape. The protective curtain 6 slides inwards into the winding groove 27 to achieve winding. The winding groove 27 and the sliding guide groove 10 have a rounded transition. During normal use of the safety escalator, the protective curtain 6 is pulled upwards from the upper end of the sliding guide groove 10 and wound up along the winding groove 27 until the entire protective curtain 6 is wound up and placed below the top plate 3. This exposes the step 5 for easy use.

[0046] like Figure 7As shown, the protective curtain 6 includes several sequentially connected connecting strips 28. A connecting post 29 is provided on one side of each connecting strip 28, and a connecting groove 30 is provided on the other side. The connecting post 29 and the connecting groove 30 are compatible, and adjacent connecting strips 28 are rotatably connected via the connecting post 29 and the connecting groove 30. The connecting post 29 and the connecting strip 28 are connected by an extension strip 31, the thickness of which is less than the diameter of the connecting post 29. The connecting groove 30 has a C-shaped structure, and the connecting post 29 passes through one end of the connecting groove 30. Even if two adjacent connecting strips 28 pull on each other, the connecting post 29 cannot be pulled out of the connecting groove 30. A lifting part 24 is provided at the lower end of the protective curtain 6, and a lifting opening 25 is provided on the lifting part 24.

[0047] This patent application describes a safety ladder designed for use with above-ground swimming pools. The inner ladder frame 1 is positioned inside the pool, while the outer ladder frame 2 is positioned outside. When the pool is not in use, a safety curtain 6 covers the steps 5 on the outer ladder frame 2 to prevent children from entering the pool without adult supervision and causing safety hazards. When the pool is in normal use, the safety curtain 6 is rolled up, exposing the steps 5 on the outer ladder frame 2, allowing users to climb into the pool using the steps 5.

[0048] Example 3: A safety escalator includes an inner escalator frame 1 and an outer escalator frame 2. A top plate 3 connects the inner escalator frame 1 and the outer escalator frame 2, forming an "eight"-shaped structure after connection. Handrails 4 are installed on both the left and right sides of the top plate 3. Anti-slip textures are provided on the upper surface of the top plate 3. Steps 5 are provided on both the inner escalator frame 1 and the outer escalator frame 2. Anti-slip textures are provided on the surface of the steps 5. A retractable protective curtain 6 is installed on the outer escalator frame 2, which covers the steps 5 on the outer escalator frame 2.

[0049] The inner escalator frame 1 includes two opposing inner escalator side panels 7, with several treads 5 spaced apart between the two inner escalator side panels 7. The outer escalator frame 2 includes two outer escalator side panels 8, with several treads 5 spaced apart between the two outer escalator side panels 8. Both the lower ends of the inner escalator frame 1 and the outer escalator frame 2 are equipped with support base plates 9. These support base plates 9 increase the support area, thereby improving the stability of the entire escalator.

[0050] Sliding guide grooves 10 are provided on both sides of the outer escalator frame 2. The sliding guide grooves 10 are located in front of the tread 5, and the protective curtain 6 is slidably adapted to the two sliding guide grooves 10 on both sides. The lower end of the sliding guide groove 10 is located at the lower part of the outer escalator frame 2. Receiving guide grooves 11 are provided on both sides of the outer escalator frame 2. The receiving guide grooves 11 are located behind the tread 5. The upper end of the receiving guide groove 11 and the upper end of the sliding guide groove 10 are connected to form an inverted U-shaped slide groove. The protective curtain 6 slides along the slide groove on both sides. Sliding guide grooves 10 and receiving guide grooves 11 are provided on the opposite surfaces of the two outer escalator side plates 8. The inverted U-shaped slide groove formed by the connection of the receiving guide groove 11 and the sliding guide groove 10 facilitates the sliding of the protective curtain 6. The distance between the two outer escalator side plates 8 is less than the width of the protective curtain 6, thereby preventing the protective curtain 6 from detaching from the slide groove.

[0051] A sliding locking element 12 is installed on the outer escalator frame 2. A limiting groove 13 is provided on the protective curtain 6, located on the side of the protective curtain 6 and close to the upper part of the curtain 6. The locking element 12 is inserted into the limiting groove 13 to lock the protective curtain 6. An installation groove 14 is provided on the outer escalator frame 2, located on one of the outer ladder side plates 8. The locking element 12 is slidably connected to the installation groove 14. Positioning protrusions 15 are provided on both sides of the locking element 12. Two positioning recesses 16 are provided on both sides of the installation groove 14, spaced vertically. The positioning protrusions 15 and positioning recesses 16 are engaged together to achieve positioning. A spring buckle 17 is provided on the locking element 12, and a recessed groove 18 is provided on the side wall of the installation groove 14. The end of the spring buckle 17 is engaged in the recessed groove 18. The locking element 12 has notches 19 on both sides, and spring clips 17 are provided at each notch 19. The mounting groove 14 has recessed grooves 18 on both opposite side walls. The two spring clips 17 are respectively engaged with the two recessed grooves 18 to prevent the locking element 12 from disengaging from the mounting groove 14. The locking element 12 has a movable locking hole 20, and the outer escalator frame 2 has a fixed locking hole 21. A protective lock 22 connects the movable locking hole 20 and the fixed locking hole 21. The locking element 12 has a movable lug, and the movable locking hole 20 is located on the movable lug. The outer escalator frame 2 has a fixed lug, and the fixed locking hole 21 is located on the fixed lug.

[0052] After the protective curtain 6 slides down into position, it covers the step 5 on the outer escalator frame 2. Then, the locking element 12 is slid down and engages with the limiting groove 13 on the protective curtain 6. At this point, the positioning protrusion 15 and the positioning recess 16 engage together to achieve positioning and locking. Then, the protective lock 22 is passed through the movable lock hole 20 and the fixed lock hole 21 and locked, thus achieving a complete protection effect. The protective curtain 6 can only be moved after the protective lock 22 is opened with a key, ensuring safety and reliability.

[0053] like Figure 7As shown, the protective curtain 6 includes several sequentially connected connecting strips 28. A connecting post 29 is provided on one side of each connecting strip 28, and a connecting groove 30 is provided on the other side. The connecting post 29 and the connecting groove 30 are compatible, and adjacent connecting strips 28 are rotatably connected via the connecting post 29 and the connecting groove 30. The connecting post 29 and the connecting strip 28 are connected by an extension strip 31, the thickness of which is less than the diameter of the connecting post 29. The connecting groove 30 has a C-shaped structure, and the connecting post 29 passes through one end of the connecting groove 30. Even if two adjacent connecting strips 28 pull on each other, the connecting post 29 cannot be pulled out of the connecting groove 30. A lifting part 24 is provided at the lower end of the protective curtain 6, and a lifting opening 25 is provided on the lifting part 24.

[0054] This patent application describes a safety ladder designed for use with above-ground swimming pools. The inner ladder frame 1 is positioned inside the pool, while the outer ladder frame 2 is positioned outside. When the pool is not in use, a safety curtain 6 covers the steps 5 on the outer ladder frame 2 to prevent children from entering the pool without adult supervision and causing safety hazards. When the pool is in normal use, the safety curtain 6 is rolled up, exposing the steps 5 on the outer ladder frame 2, allowing users to climb into the pool using the steps 5.

[0055] Example 4: A safety escalator, similar in structure to Example 2, with the main difference being that the protective curtain 6 in this example is a flexible, integrated structure, with several hollow reinforcing ribs 23 spaced apart on the curtain 6. A lifting section 24 is provided at the upper end of the curtain 6, with a lifting opening 25 on the lifting section 24. Other structural features are the same as in Example 2.

[0056] The embodiments described above are merely preferred solutions of this utility model and are not intended to limit this utility model in any way. Other variations and modifications are possible without departing from the technical solutions described in the claims.

Claims

1. A safety escalator, characterized in that, It includes an inner escalator frame and an outer escalator frame, both of which are equipped with treads. The outer escalator frame is fitted with a retractable safety curtain that covers the treads on the outer escalator frame.

2. The safety escalator according to claim 1, characterized in that, Sliding guide grooves are installed on both sides of the external escalator frame. The sliding guide grooves are located in front of the steps, and the two sides of the protective curtain are respectively adapted to slide with the two sliding guide grooves.

3. A safety escalator according to claim 2, characterized in that, Storage guide grooves are provided on both sides of the external escalator frame. The storage guide grooves are located behind the steps. The upper end of the storage guide groove and the upper end of the sliding guide groove are connected to form an inverted U-shaped slide groove. The protective curtains slide along the slide grooves on both sides.

4. A safety escalator according to claim 3, characterized in that, The external escalator frame includes two external ladder side plates, and sliding guide grooves and storage guide grooves are provided on the opposite surfaces of the two external ladder side plates.

5. A safety escalator according to claim 2, characterized in that, The inner and outer escalator frames are connected by a top plate, and protective plates are connected to both sides of the top plate. A winding groove is provided on the opposite surface of the two protective plates. One end of the winding groove is connected to the upper end of the sliding guide groove, and the other end of the winding groove is wound inward. The protective curtain slides into the winding groove on both sides to achieve winding.

6. A safety escalator according to any one of claims 1 to 5, characterized in that, A sliding locking device is installed on the external escalator frame, and a limit groove is provided on the protective curtain. The locking device and the limit groove are inserted and connected to achieve positioning and locking of the protective curtain.

7. A safety escalator according to claim 6, characterized in that, An installation groove is provided on the external escalator frame, and a locking component is slidably connected to the installation groove. A positioning protrusion is provided on the locking component, and a positioning recess is provided on the side wall of the installation groove. The positioning protrusion and the positioning recess are engaged together to achieve positioning.

8. A safety escalator according to claim 7, characterized in that, The locking component is equipped with a spring clip, and the side wall of the mounting groove is equipped with a recessed groove, with the end of the spring clip being engaged in the recessed groove.

9. A safety escalator according to claim 7, characterized in that, The locking element is provided with a movable locking hole, and the outer escalator frame is provided with a fixed locking hole. A protective lock is connected between the movable locking hole and the fixed locking hole.

10. A safety escalator according to any one of claims 1 to 5, characterized in that, The protective curtain is an integral structure with several hollow reinforcing ribs spaced apart on it; or, the protective curtain includes several connecting strips connected in sequence, with a connecting post on one side of the connecting strip and a connecting groove on the other side, and adjacent connecting strips are rotatably connected by the connecting post and the connecting groove.

Images