A balustrade

Abstract

This application discloses a window guardrail, relating to the technical field of protective railings. It includes a fixed railing and a movable railing. The fixed railing includes a square fixed frame with multiple vertical reinforcing bars spaced apart inside. The movable railing is positioned above the fixed railing and includes movable side bars on both sides. A movable top bar is fixed to the end of each side bar away from the fixed railing, and both ends of the top bar are fixed to the ends of the two side bars. The two side bars are located on opposite sides of the fixed frame, near the outer edge, and are hinged to the fixed frame to allow them to flip and lower relative to it. When the window is closed, the side bars are vertical; when the window is open, the movable railing lowers by flipping the side bars relative to the fixed frame. This application facilitates the opening of the window.

Description

Technical Field

[0001] This application relates to the technical field of guardrails, and in particular to a window guardrail. Background Technology

[0002] Windows are typically installed on the walls of buildings. Glass windows provide aesthetic appeal and facilitate indoor lighting. Some windows can be opened; these generally consist of fixed glass at the bottom and operable sashes at the top. Operable sashes allow users to open the window and ventilate the room.

[0003] According to relevant industry regulations, operable windows inside buildings must be protected. The protective height of window sills should not be less than 0.90m in residences, nurseries, kindergartens, primary and secondary schools, and places where children can play alone; and not less than 0.80m in other buildings. Furthermore, when designing the protection, the height must be measured from the walkable surface; therefore, window guardrails are generally quite high.

[0004] However, higher railings can cause some problems in actual use. For example, the height of the railing may conflict with the height of the window sash. When the window sash needs to be opened, the excessively high railing may interfere with the sash, preventing it from opening properly. Summary of the Invention

[0005] In order to improve the situation where the railing interferes with the open window, causing the operable window to be unable to open normally, this application provides a window guard railing.

[0006] This application provides a window guardrail, which adopts the following technical solution:

[0007] A type of window guardrail, including

[0008] A fixed railing, comprising a square fixed frame, wherein multiple vertical reinforcing bars are provided inside the fixed frame, the multiple reinforcing bars are placed at intervals, and the bottom of the fixed railing is used to fix it to the floor, and its height is lower than the height of the opening door;

[0009] A movable railing, which is located above a fixed railing, includes movable side rails on both sides, and a movable top rail is fixed to one end of each movable side rail away from the fixed railing. The two ends of the movable top rail are respectively fixed to the ends of the two movable side rails.

[0010] The two movable side bars are respectively located on the outer side of the fixed frame. The movable side bars are hinged to the fixed frame at their corresponding positions so that the movable side bars can be flipped down relative to the fixed frame. When the opening fan is closed, the movable side bars are in a vertical state. When the opening fan is open, the movable railing can be lowered by flipping the movable side bars relative to the fixed frame.

[0011] By adopting the above technical solution, the fixed railing at the bottom is vertically fixed to the floor and its height is lower than that of the operable door. Therefore, the fixed railing will not interfere with the opening and closing of the operable door and can play a protective role. In order to meet the relevant protection height requirements, a movable railing is installed above the fixed railing. The movable railing is hinged to the fixed railing through movable side bars on both sides, so that the movable railing can be flipped relative to the fixed railing. When the operable door is closed, the movable railing can be flipped to a vertical state. The height of the fixed railing plus the movable railing can fully meet the height requirements of the protection standard. When the operable door needs to be opened, the movable railing can be flipped down first to avoid interference with the operable door.

[0012] Optionally, fixed pins are inserted into both sides of the fixed frame, and the fixed pins are also inserted through the movable side rods. The movable side rods are rotatably connected to the fixed pins, and the movable side rods are inserted with movable pins below the fixed pins. The movable pins are also inserted through both sides of the fixed frame, and the movable pins are slidably connected to both the movable side rods and the fixed frame.

[0013] By adopting the above technical solution, the fixed pins are inserted on both sides of the fixed frame, and the same fixed pin is also inserted into the movable side bar. This allows the movable side bar to be flipped relative to the fixed railing through the fixed pins, and the movable railing can also be restricted to the fixed railing. When the movable railing is in a vertical state, the movable pin can be inserted into both the fixed frame and the movable side bar at the same time, thereby restricting the rotation of the movable railing and keeping the movable railing in a vertical state.

[0014] Optionally, a slide rail is slidably connected to the inner wall of the movable side rod, the slide rail extends along the length of the movable side rod, the fixed pin is inserted into the slide rail, the slide rail is rotatably connected to the fixed pin, the movable pin passes through both the slide rail and the movable side rod, the movable side rod has multiple limiting holes, the multiple limiting holes are spaced apart along the length of the movable side rod, and the movable pin is inserted into one of the limiting holes.

[0015] By adopting the above technical solution, the fixed pin is simultaneously inserted into the slide rail and the fixed frame, restricting the slide rail to a fixed position on the fixed frame, and also allowing the slide rail to rotate relative to the fixed frame. At the same time, the movable side rod is slidably connected to the slide rail, and an external force can be applied to the movable side rod to make it slide relative to the slide rail, thus freely adjusting the height of the movable railing to meet different protection requirements. Once the height is determined, the movable pin can be inserted into one of the corresponding limiting holes of the movable side rod, thereby fixing the length of the movable side rod extending relative to the fixed frame.

[0016] Optionally, the fixed frame is slidably connected to two unlocking rods within the top side frame. Both unlocking rods slide along the length of the top frame of the fixed frame and move in opposite directions. One end of each unlocking rod is fixed to a movable pin. When one or both unlocking rods are moved, the movable pins on the two side frames of the fixed frame move towards or away from each other, so as to disengage from or insert into one of the limiting holes.

[0017] By adopting the above technical solution, when it is necessary to lock or unlock two movable pins, external force can be applied to the two unlocking rods at the same time. The unlocking rods drive the corresponding movable pins to move. Since moving one or two unlocking rods can drive two movable pins at the same time, it is convenient for users to unlock or lock the movable railing.

[0018] Optionally, the two unlocking rods are symmetrically distributed at the center line position of the top edge of the fixed frame. Each of the two unlocking rods includes an unlocking part, a sliding part, and a connecting part. The sliding part slides horizontally within the top edge of the fixed frame. The unlocking part and the connecting part are respectively located at both ends of the sliding part. The connecting part extends downward and is fixed to the end of the movable pin away from the movable side rod. The unlocking part protrudes upward outside the fixed frame.

[0019] By adopting the above technical solution, an external force can be applied to the unlocking parts of the two unlocking rods. Since the two unlocking parts are close to each other, the user can conveniently operate the two unlocking parts at the same time, without having to move to the two movable pins of the same fixed frame to insert or remove them. This makes it convenient for the user. At the same time, the sliding part is slidably connected in the fixed frame, which allows the sliding part to move stably and makes it easier for the movable pin to be inserted into the limiting hole.

[0020] Optionally, the fixed frame is provided with a partition plate between the two unlocking rods, and a first elastic element is provided between the partition plate and the unlocking rods. The first elastic element is placed horizontally, with one end connected to the partition plate and the other end connected to the side wall of the unlocking part.

[0021] By adopting the above technical solution, one end of the first elastic element is connected to the partition plate, and the other end is connected to the side wall of the unlocking part. When an external force is applied to bring the two unlocking parts closer to each other, the connecting part drives the movable pin to disengage from the movable side rod, thereby unlocking the movable side rod. At this time, the first elastic element is compressed and stores elastic potential energy. When the external force is applied, the elastic potential energy stored in the first elastic element will return the unlocking rod to its original position. At this time, the connecting part pushes the movable pin to be re-inserted into the movable side rod.

[0022] Optionally, one of the unlocking rods includes an unlocking part, a sliding part, and a connecting part. The sliding part slides horizontally within the top edge of the fixed frame. The unlocking part and the connecting part are respectively located on the upper and lower sides of the sliding part. The connecting part extends downward and is fixed to one of the movable pins at the end away from the movable side rod. The unlocking part protrudes upward outside the fixed frame. The other unlocking rod includes a sliding rod and a connecting rod. The sliding rod slides horizontally within the top edge of the fixed frame and is located below the sliding part. A driving assembly is provided between the sliding part and the sliding rod to drive the sliding part and the sliding rod to move towards or away from each other.

[0023] By adopting the above technical solution, the sliding part of one unlocking rod is linked with the sliding rod of the other unlocking rod through the drive component, so that only one unlocking rod needs to be subjected to external force to drive the two unlocking rods to move towards or away from each other at the same time, further improving the convenience of operation.

[0024] Optionally, the drive assembly includes a drive gear and a linkage tooth profile. The linkage tooth profiles are respectively disposed on opposite surfaces of the sliding part and the sliding rod, which are close to each other. The linkage tooth profiles on the sliding part and the sliding rod simultaneously mesh with the drive gear. The drive gear is rotatably connected to the top frame of the fixed frame, and the axis of rotation is perpendicular to the length direction of the sliding rod.

[0025] By adopting the above technical solution, the two unlocking rods are driven by the meshing of the drive gear and the linkage tooth profile, thereby realizing the movement of the two unlocking rods towards or away from each other.

[0026] Optionally, an abutment plate is provided inside the fixed frame. The abutment plate is located on the side of the unlocking part away from the sliding rod. A second elastic member is provided between the abutment plate and the unlocking part. One end of the second elastic member is connected to the abutment plate, and the other end is connected to the side wall of the unlocking part.

[0027] By adopting the above technical solution, when an external force is applied to the unlocking part to make it move, the unlocking part will compress the second elastic element, so that the second elastic element generates a restoring force. When the external force is no longer applied, the restoring force stored in the second elastic element will return the unlocking rod to its original position.

[0028] In summary, this application includes at least one of the following beneficial effects:

[0029] 1. By using a movable railing hinged to the upper part of the fixed railing, when the opening panel needs to be opened, the movable railing can be flipped and lowered, thereby avoiding interference between the guardrail and the opening of the opening panel, while also ensuring the protective height of the guardrail;

[0030] 2. By using a slide rail installed on the inner wall of the movable side rail, the movable side rail can extend and retract relative to the slide rail, thereby freely adjusting the protective height of the movable railing;

[0031] 3. By using two unlocking rods that are slidably connected to the top frame of the fixed frame, moving one or both unlocking rods at the same time can lock or unlock the movable pins on both sides of the same fixed frame, making it convenient for users to operate. Attached Figure Description

[0032] Figure 1 This is a structural schematic diagram of the installation position of the window guard railing in Embodiment 1 of this application;

[0033] Figure 2 This is a schematic diagram of the overall structure of the window guardrail shown in Embodiment 1 of this application;

[0034] Figure 3 This is a structural schematic diagram illustrating the position of the unlocking lever in Embodiment 2 of this application;

[0035] Figure 4 yes Figure 3 An enlarged view at point A;

[0036] Figure 5 This is a structural schematic diagram illustrating the working principle of the unlocking lever in Embodiment 3 of this application;

[0037] Figure 6 yes Figure 5 Enlarged diagram at point B.

[0038] Explanation of reference numerals in the attached drawings: 1. Fixed railing; 11. Fixed frame; 111. Fixed pin; 112. Movable pin; 113. Divider plate; 114. First elastic element; 115. Abutment plate; 116. Second elastic element; 12. Reinforcing vertical bar; 2. Floor; 21. Window sill; 22. Fixed glass; 23. Opening sash; 3. Movable railing; 31. Movable side bar; 311. Slide rail; 312. Limiting hole; 32. Movable top bar; 33. Reinforcing horizontal bar; 4. Unlocking bar; 41. Unlocking part; 42. Sliding part; 43. Connecting part; 44. Sliding rod; 45. Connecting rod; 5. Drive gear; 6. Linkage gear profile. Detailed Implementation

[0039] The following is in conjunction with the appendix Figure 1-6This application will be described in further detail.

[0040] Example 1:

[0041] Embodiment 1 of this application discloses a window guardrail, referring to... Figure 1 and Figure 2 The window guardrail includes a fixed railing 1, which comprises a square fixed frame 11. The size of a single fixed railing 1 can be adjusted according to actual conditions. The bottom of the fixed railing 1 is fixed to the floor 2, and the fixed railing 1 is placed vertically on the side of the windowsill 21 closest to the interior. The window is also vertically fixed to the windowsill 21 so that the fixed railing 1 can provide protection. The window includes a fixed glass 22 at the bottom and an operable sash 23 at the top. The height of the fixed railing 1 is lower than the height of the operable sash 23. In Embodiment 1 of this application, the height of the windowsill 21 is 300mm, the height of the fixed glass 22 is 800mm, and the height of the fixed railing 1 is 950mm, thereby avoiding interference with the opening or closing of the operable sash 23. Multiple fixed railings 1 can be placed side by side as needed.

[0042] The square fixed frame 11 has multiple vertical reinforcing rods 12 fixed inside. The reinforcing rods 12 are placed at intervals, and their upper and lower ends are welded to the inner wall of the fixed frame 11. The reinforcing rods 12 can not only fill the square blank area in the middle of the fixed frame 11 to improve the protection capability, but also further improve the rigidity and stability of the fixed frame 11.

[0043] The window guardrail also includes a movable railing 3, which is located above the fixed railing 1. The movable railing 3 includes two movable side rails 31 on both sides, and the two movable side rails 31 are of the same length. A movable top rail 32 is fixed to the end of the movable side rail 31 away from the fixed railing 1. The two ends of the movable top rail 32 are fixedly connected to the ends of the two movable side rails 31, forming the frame structure of the movable railing 3. A reinforcing crossbar 33 is fixed inside the hollow frame of the movable railing 3 to enhance the overall strength of the movable railing 3.

[0044] Reference Figure 1 and Figure 2 Two movable side bars 31 are respectively located on the outer side of the two sides of the fixed frame 11. Fixed pins 111 are inserted on both sides of the fixed frame 11. The fixed pins 111 are also inserted into the movable side bars 31. The fixed pins 111 can be fixed on the fixed frame 11. The movable side bars 31 are rotatably connected to the fixed pins 111, so that the movable side bars 31 can be flipped relative to the fixed frame 11 through the fixed pins 111, thereby realizing the flipping action of the movable railing 3 relative to the fixed railing 1.

[0045] A movable pin 112 is inserted below the fixed pin 111 on the movable side bar 31. The movable pin 112 passes through both sides of the fixed frame 11. The movable pin 112 is slidably connected to both the movable side bar 31 and the fixed frame 11, meaning that the movable pin 112 can be flexibly inserted into or removed from both the movable side bar 31 and the fixed frame 11. When the movable railing 3 is in a vertical state, the movable pin 112 can be inserted into both the fixed frame 11 and the movable side bar 31, thereby restricting the rotation of the movable railing 3 and keeping it in a vertical state.

[0046] When the opening panel 23 is closed, the movable railing 3 can be flipped to a vertical position. The height of the fixed railing 1 plus the movable railing 3 can fully meet the height requirements of the protection standard. When the opening panel 23 needs to be opened, the movable railing 3 can be flipped down first to avoid interference with the opening action of the opening panel 23.

[0047] Reference Figure 1 and Figure 2 To further improve the flexibility of the window guardrail, a slide rail 311 is slidably connected to the inner wall of the movable side rod 31. The slide rail 311 extends along the length of the movable side rod 31, allowing the movable side rod 31 to slide relative to the slide rail 311. A fixed pin 111 is inserted into the slide rail 311, and the slide rail 311 is rotatably connected to the fixed pin 111. A movable pin 112 passes through both the slide rail 311 and the movable side rod 31, thereby limiting the position of the slide rail 311 on the fixed frame 11 through the fixed pin 111 and the movable pin 112. The movable side rod 31 has multiple limiting holes 312 that are spaced apart along the length of the movable side rod 31, allowing the movable pin 112 to be selectively inserted into one of the limiting holes 312.

[0048] Users can apply external force to the movable side bar 31 to make it slide relative to the slide rail 311, thereby freely adjusting the height of the movable railing 3 to meet different protection requirements. Once the height is determined, the movable pin 112 can be inserted into one of the corresponding limiting holes 312 of the movable side bar 31, thereby fixing the length of the movable side bar 31 extending relative to the fixed frame 11.

[0049] The implementation principle of the window guard railing in Embodiment 1 of this application is as follows: the window guard railing is divided into an upper movable railing 3 and a lower fixed railing 1, ensuring that the overall height of the window guard railing meets the specifications and user requirements. At the same time, the upper movable railing 3 can be lowered around the fixed pin 111 to meet the usage requirements of the opening sash 23. This solves the problem that traditional window guard railings cannot simultaneously meet the requirements of window guard railing specifications and user requirements with the usage height requirements of the opening sash 23. In addition, the slide rail 311 installed on the inner side of the movable side rail 31 allows the movable railing 3 to be freely adjusted in height to meet different usage height requirements.

[0050] Example 2:

[0051] The difference between Example 2 and Example 1 is that: (Refer to...) Figure 3 and Figure 4 Two unlocking rods 4 are slidably connected within the top side frame of the fixed frame 11. The two unlocking rods 4 are symmetrically distributed relative to the center line of the top frame of the fixed frame 11. Each unlocking rod 4 includes an unlocking part 41, a sliding part 42, and a connecting part 43. The sliding part 42 is aligned with the length direction of the top frame of the fixed frame 11 and is horizontally slidably connected within the top frame of the fixed frame 11. The unlocking part 41 and the connecting part 43 are respectively fixed to both ends of the sliding part 42. The connecting part 43 extends downward and is fixed to the end of the movable pin 112 away from the movable side rod 31. The unlocking part 41 protrudes upward from the fixed frame 11. The fixed frame 11 has a moving groove for the unlocking part 41 and the connecting part 43 to move.

[0052] When it is necessary to lock or unlock the two movable pins 112, an external force can be applied to the two unlocking rods 4 at the same time. The unlocking rods 4 drive the corresponding movable pins 112 to move, thereby driving the two movable pins 112 at the same time. This makes it convenient for the user to unlock or lock the movable railing 3. Since the two unlocking parts 41 are close to each other, the user can easily operate the two unlocking parts 41 at the same time without having to move to the two movable pins 112 of the same fixed frame 11 to insert or remove them, which is convenient for the user.

[0053] Furthermore, a partition plate 113 is fixed between the two unlocking rods 4 in the fixed frame 11. A first elastic element 114 is provided between the partition plate 113 and the unlocking rod 4. The first elastic element 114 can be a compression spring and is placed horizontally. One end of the first elastic element 114 is fixedly connected to the partition plate 113, and the other end is fixedly connected to the side wall of the unlocking part 41. When an external force is applied to bring the two unlocking parts 41 closer together, the connecting part 43 drives the movable pin 112 to disengage from the movable side rod 31, thereby unlocking the movable side rod 31. At this time, the first elastic element 114 is compressed and stores elastic potential energy. When the external force is applied, the elastic potential energy stored in the first elastic element 114 returns the unlocking rod 4 to its original position. At this time, the connecting part 43 pushes the movable pin 112 to be re-inserted into the movable side rod 31.

[0054] Example 3:

[0055] The difference between Example 3 and Example 2 is that, referring to Figure 5 and Figure 6One of the two unlocking levers 4 includes an unlocking part 41, a sliding part 42, and a connecting part 43. The sliding part 42 slides horizontally within the top edge of the fixed frame 11. The unlocking part 41 and the connecting part 43 are fixed to the upper and lower sides of the sliding part 42, respectively. The connecting part 43 extends downward and is fixed to one end of a movable pin 112 away from the movable side rod 31. The unlocking part 41 protrudes upward from the fixed frame 11. The other unlocking lever 4 includes a sliding rod 44 and a connecting rod 45. The sliding rod 44 slides horizontally within the top edge of the fixed frame 11 and is located below the sliding part 42. The connecting rod 45 is fixed to the end of the sliding part 42 away from the sliding part 42 and is fixed to another movable pin 112.

[0056] A drive gear 5 is provided between the sliding part 42 and the sliding rod 44. The drive gear 5 is rotatably connected to the top frame of the fixed frame 11, and the axis of rotation is perpendicular to the length direction of the sliding rod 44. A linkage tooth profile 6 is provided on the opposing surfaces of the sliding part 42 and the sliding rod 44 at their respective ends. The linkage tooth profiles 6 on both the sliding part 42 and the sliding rod 44 mesh with the drive gear 5. By applying external force to the unlocking part 41 of one of the unlocking rods 4, the unlocking part 41 drives the sliding part 42 to move. The moving sliding part 42, through the meshing linkage tooth profile 6 and the drive gear 5, drives the sliding rod 44 of the other unlocking rod 4 to move in the opposite direction. This allows for the simultaneous driving of the two unlocking rods 4 to move towards or away from each other, further improving the convenience of operation.

[0057] Furthermore, a stop plate 115 is fixed inside the fixed frame 11. The stop plate 115 is located on the side of the unlocking part 41 away from the sliding rod 44. A second elastic element 116 is provided between the stop plate 115 and the unlocking part 41. The second elastic element 116 can be a compression spring. One end of the second elastic element 116 is fixedly connected to the stop plate 115, and the other end is fixedly connected to the side wall of the unlocking part 41. When an external force is applied to the unlocking part 41 to make it move, the unlocking part 41 will compress the second elastic element 116, causing the second elastic element 116 to generate a restoring force. When the external force is no longer applied, the restoring force generated by the compression of the second elastic element 116 will return the unlocking part 41 to its original position.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A balustrade, characterised in that: include Fixed railing (1), the fixed railing (1) includes a square fixed frame (11), the fixed frame (11) is provided with multiple vertical reinforcing bars (12) inside, the multiple reinforcing bars (12) are placed at intervals, the bottom of the fixed railing (1) is used to fix to the floor (2), and the height is lower than the height of the opening fan (23); The movable railing (3) is located above the fixed railing (1). The movable railing (3) includes movable side bars (31) on both sides. A movable top bar (32) is fixed at one end of the movable side bar (31) away from the fixed railing (1). The two ends of the movable top bar (32) are respectively fixed to the ends of the two movable side bars (31). The two movable side bars (31) are respectively located on the outer side of the fixed frame (11). The movable side bars (31) are hinged to the fixed frame (11) at the position corresponding to the fixed frame (11) so that the movable side bars (31) can be flipped down relative to the fixed frame (11). When the opening fan (23) is closed, the movable side bars (31) are in a vertical state. When the opening fan (23) is opened, the movable railing (3) can be lowered by flipping the movable side bars (31) relative to the fixed frame (11). Fixed pins (111) are inserted into both sides of the fixed frame (11). The fixed pins (111) are also inserted into the movable side rod (31). The movable side rod (31) is rotatably connected to the fixed pins (111). A movable pin (112) is inserted below the fixed pins (111) on the movable side rod (31). The movable pin (112) is inserted into both sides of the fixed frame (11). The movable pin (112) is slidably connected to both the movable side rod (31) and the fixed frame (11). The inner wall of the movable side rod (31) is slidably connected to a slide rail (311), the slide rail (311) extends along the length of the movable side rod (31), the fixed pin (111) is inserted into the slide rail (311), the slide rail (311) is rotatably connected to the fixed pin (111), the movable pin (112) passes through both the slide rail (311) and the movable side rod (31), the movable side rod (31) is provided with multiple limiting holes (312), the multiple limiting holes (312) are spaced apart along the length of the movable side rod (31), and the movable pin (112) is inserted into one of the limiting holes (312); The fixed frame (11) has two unlocking rods (4) slidably connected inside the top side frame. Both unlocking rods (4) slide along the length of the top frame of the fixed frame (11) and move in opposite directions. One end of each of the two unlocking rods (4) is fixed to a movable pin (112). When one or both unlocking rods (4) are moved, the movable pins (112) on the two side frames of the fixed frame (11) move towards or away from each other, so as to disengage from or insert into one of the limiting holes (312). The two unlocking rods (4) are symmetrically distributed at the center line of the top frame of the fixed frame (11). Each of the two unlocking rods (4) includes an unlocking part (41), a sliding part (42) and a connecting part (43). The sliding part (42) slides horizontally within the top frame of the fixed frame (11). The unlocking part (41) and the connecting part (43) are respectively located at both ends of the sliding part (42). The connecting part (43) extends downward and is fixed to the end of the movable pin (112) away from the movable side rod (31). The unlocking part (41) protrudes upward outside the fixed frame (11).

2. A guardrail according to claim 1, characterised in that: The fixed frame (11) has a partition plate (113) between the two unlocking rods (4), and a first elastic element (114) is provided between the partition plate (113) and the unlocking rods (4). The first elastic element (114) is placed horizontally, with one end connected to the partition plate (113) and the other end connected to the side wall of the unlocking part (41).

3. A balustrade, characterised in that: Fixed railing (1), the fixed railing (1) includes a square fixed frame (11), the fixed frame (11) is provided with multiple vertical reinforcing bars (12) inside, the multiple reinforcing bars (12) are placed at intervals, the bottom of the fixed railing (1) is used to fix to the floor (2), and the height is lower than the height of the opening fan (23); The movable railing (3) is located above the fixed railing (1). The movable railing (3) includes movable side bars (31) on both sides. A movable top bar (32) is fixed at one end of the movable side bar (31) away from the fixed railing (1). The two ends of the movable top bar (32) are respectively fixed to the ends of the two movable side bars (31). The two movable side bars (31) are respectively located on the outer side of the fixed frame (11). The movable side bars (31) are hinged to the fixed frame (11) at the position corresponding to the fixed frame (11) so that the movable side bars (31) can be flipped down relative to the fixed frame (11). When the opening fan (23) is closed, the movable side bars (31) are in a vertical state. When the opening fan (23) is opened, the movable railing (3) can be lowered by flipping the movable side bars (31) relative to the fixed frame (11). Fixed pins (111) are inserted into both sides of the fixed frame (11). The fixed pins (111) are also inserted into the movable side rod (31). The movable side rod (31) is rotatably connected to the fixed pins (111). A movable pin (112) is inserted below the fixed pins (111) on the movable side rod (31). The movable pin (112) is inserted into both sides of the fixed frame (11). The movable pin (112) is slidably connected to both the movable side rod (31) and the fixed frame (11). The inner wall of the movable side rod (31) is slidably connected to a slide rail (311), the slide rail (311) extends along the length of the movable side rod (31), the fixed pin (111) is inserted into the slide rail (311), the slide rail (311) is rotatably connected to the fixed pin (111), the movable pin (112) passes through both the slide rail (311) and the movable side rod (31), the movable side rod (31) is provided with multiple limiting holes (312), the multiple limiting holes (312) are spaced apart along the length of the movable side rod (31), and the movable pin (112) is inserted into one of the limiting holes (312); The fixed frame (11) has two unlocking rods (4) slidably connected inside the top side frame. Both unlocking rods (4) slide along the length of the top frame of the fixed frame (11) and move in opposite directions. One end of each of the two unlocking rods (4) is fixed to a movable pin (112). When one or both unlocking rods (4) are moved, the movable pins (112) on the two side frames of the fixed frame (11) move towards or away from each other, so as to disengage from or insert into one of the limiting holes (312). One of the unlocking rods (4) includes an unlocking part (41), a sliding part (42), and a connecting part (43). The sliding part (42) slides horizontally within the top frame of the fixed frame (11). The unlocking part (41) and the connecting part (43) are respectively located on the upper and lower sides of the sliding part (42). The connecting part (43) extends downward and is fixed to one end of a movable pin (112) away from the movable side rod (31). The unlocking part (41) protrudes upward outside the fixed frame (11). The other unlocking rod (4) includes a sliding rod (44) and a connecting rod (45). The sliding rod (44) slides horizontally within the top frame of the fixed frame (11) and is located below the sliding part (42). A driving assembly is provided between the sliding part (42) and the sliding rod (44) to drive the sliding part (42) and the sliding rod (44) to move towards or away from each other.

4. A guardrail according to claim 3, characterised in that: The drive assembly includes a drive gear (5) and a linkage tooth profile (6). The linkage tooth profile (6) is respectively disposed on the opposite surfaces of the sliding part (42) and the sliding rod (44) at one end. The linkage tooth profile (6) on the sliding part (42) and the sliding rod (44) mesh with the drive gear (5) at the same time. The drive gear (5) is rotatably connected to the top frame of the fixed frame (11), and the axis of rotation is perpendicular to the length direction of the sliding rod (44).

5. A guardrail according to claim 3, characterised in that: An abutment plate (115) is provided inside the fixed frame (11). The abutment plate (115) is located on the side of the unlocking part (41) away from the sliding rod (44). A second elastic member (116) is provided between the abutment plate (115) and the unlocking part (41). One end of the second elastic member (116) is connected to the abutment plate (115), and the other end is connected to the side wall of the unlocking part (41).

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