Prefabricated building construction inclined bracing structure and installation method thereof

Abstract

This invention discloses a prefabricated building construction inclined support structure and its installation method, relating to the technical field of inclined support structures. This invention provides a prefabricated building construction inclined support structure and its installation method that does not damage the building when supporting it and is easy to use. The prefabricated building construction inclined support structure includes a rotating seat, a first screw, a rotating frame, and a main rod. The rotating frame is rotatably connected to the end of the main rod. The first screw is threadedly connected to the rotating frame, and the rotating seat is rotatably connected to the opposite side of the first screw. This invention allows the support seat to contact the ceiling and ground to fix the main rod by rotating the rotating frame, and the support frame to fix the staircase. No drilling is required for fixing, thus preventing damage to the building and eliminating the need for later repairs. This makes assembly and disassembly convenient, and the inclined support improves the stability of the staircase, reducing tilting and swaying.

Description

Technical Field

[0001] This invention relates to the field of inclined support structure technology, and in particular to an inclined support structure for prefabricated building construction and its installation method. Background Technology

[0002] Prefabricated construction is quite common nowadays, offering good overall comfort and relatively simple construction, making it popular with most people. Prefabricated construction transfers a large amount of on-site work from traditional construction methods to factories, manufacturing building components and accessories such as floor slabs, wall panels, stairs, and balconies. All building components are prefabricated in the factory and then transported to the construction site for on-site assembly. During assembly, the components need to be supported to facilitate assembly by workers. For example, when assembling stairs, manual positioning is required before the stairs are assembled and secured. A diagonal bracing structure is then used for support, with one end bolted to the ground and the other end fixed to the stairs. This makes assembly and disassembly inconvenient and easily leaves marks on the building surface, requiring later repairs, which is quite troublesome.

[0003] In summary, there is a need to develop a prefabricated building construction diagonal support structure and its installation method that will not damage the building when supporting it and is easy to use. Summary of the Invention

[0004] In order to overcome the shortcomings of existing technologies, such as the tendency of inclined support structures to damage buildings when supporting them, this invention provides a prefabricated building construction inclined support structure and its installation method that does not damage buildings when supporting them and is easy to use.

[0005] To achieve the above objectives, the present invention provides the following solution: a prefabricated building construction inclined support structure, comprising a support base, a rotating base, a first screw, a rotating frame, a main rod, and a support assembly. The main rod is rotatably connected to the symmetrically arranged rotating frames at its end. Each of the symmetrically arranged rotating frames is threadedly connected to the first screw. The rotating base is rotatably connected to the opposite side of each of the symmetrically arranged first screws. The support base is fixedly connected to the opposite side of each of the symmetrically arranged rotating bases. The main rod is provided with a support assembly for supporting the staircase.

[0006] In a preferred embodiment of the present invention, the support assembly includes a first bracket, a second bracket, a sliding rod, a first fixing block, a rotating block, a support frame, and an adjustment assembly. The main rod is fixedly connected to the first bracket, and the second bracket is fixedly connected to the side of the main rod near the first bracket. The sliding rod is slidably connected inside both the first bracket and the second bracket. The first fixing block is fixedly connected to the top of the sliding rod away from the main rod. The rotating block is rotatably connected to the top of the first fixing block, and the support frame is rotatably connected to the top of the rotating block. The sliding rod is provided with an adjustment assembly for adjusting the position of the support frame.

[0007] In a preferred embodiment of the present invention, the adjusting assembly includes a telescopic frame, a connecting block, and a second screw. The sliding rod, which is symmetrically arranged, is rotatably connected to the main rod on the side away from the main rod. The connecting block is fixedly connected to the side of the sliding rod away from the telescopic frame. The first bracket is threadedly connected to the second screw, and the second screw is rotatably connected to the connecting block.

[0008] In a preferred embodiment of the present invention, the device further includes a second fixing block, a wedge block, a linear spring, a trigger rod, a screw, and a first torsion spring. The second fixing block is fixedly connected to the side of the support frame, the wedge block is slidably connected inside the second fixing block, the linear spring is connected between the wedge block and the bottom of the second fixing block, the screw is threadedly connected to the side of the support frame near the wedge block, the trigger rod is fixedly connected to the screw, and the first torsion spring is connected between the screw and the support frame.

[0009] In a preferred embodiment of the present invention, the inclined block contacts the trigger rod, and the inclined block moves downward to press the trigger rod, thereby causing the screw to rotate.

[0010] In a preferred embodiment of the present invention, the screw rotates to contact the rotating block, and the screw rotates to abut against the rotating block to lock the support frame.

[0011] In a preferred embodiment of the present invention, the device further includes an F-shaped fixing block, a rotating component, a belt, a third fixing block, a toothed component, a fourth fixing block, a sealing block, and a rotating shaft. The first bracket is fixedly connected to the F-shaped fixing block. The second screw has a sliding groove. The main rod is fixedly connected to the third fixing block near the telescopic frame. The third fixing block is rotatably connected to the rotating shaft. The rotating shaft is fixedly connected to the rotating component. The rotating component is rotatably connected to the F-shaped fixing block. The rotating component is slidably connected to the sliding groove of the second screw. The belt is wound around the rotating components. The rotating shaft is rotatably connected to the toothed component. The main rod is fixedly connected to the fourth fixing block near the toothed component. The fourth fixing block is slidably connected to the sealing block. The telescopic frame has an air hole near the sealing block. The sealing block blocks the air hole of the telescopic frame.

[0012] In a preferred embodiment of the present invention, the telescopic frame is hollow inside.

[0013] In a preferred embodiment of the present invention, the invention further includes a second torsion spring, a connecting rod, a rope, and a limiting block. The second torsion spring is connected between the first fixing block and the rotating block. The connecting rod is fixed to the rotating block. The rope is connected to the connecting rod and passes through the second bracket. The limiting block for limiting the rope is fixed to the side of the rope near the second bracket.

[0014] A method for installing a diagonal bracing structure in prefabricated building construction, comprising the following steps:

[0015] S1: First, place the main rod at the staircase that needs support, then rotate the rotating frame so that the support seat moves outward to contact the ceiling and floor to fix the main rod;

[0016] S2: Then rotate the second screw to adjust the position of the support frame so that the support frame can provide positioning support for the stairs;

[0017] S3: As the staircase comes into contact with the inclined block, the inclined block presses against the trigger rod, causing the screw to rotate, which in turn moves the screw to block the rotating block and lock the support frame.

[0018] S4: The second screw rotates, driving the rotating part and the belt to rotate. The belt drives the rotating shaft and the toothed part to rotate, thereby pushing the sealing block. The sealing block moves, and the telescopic frame can be extended and adjusted. When the sealing block is reset, the telescopic frame can no longer be extended and adjusted, thus locking the telescopic frame.

[0019] S5: Pull the rope to rotate the connecting rod and the rotating block to adjust the position of the support frame.

[0020] The present invention has the following advantages: by rotating the rotating frame, the support base can be made to contact the ceiling and the ground to fix the main rod, and the support frame can fix the stairs without drilling holes, thus avoiding damage to the building and eliminating the need for later repairs. Thus, disassembly and assembly are more convenient, and the diagonal support can improve the stability of the stairs and reduce tilting and swaying.

[0021] As the staircase descends during installation until it contacts the ramp, the ramp presses against the trigger rod, causing the screw to rotate and press against the rotating block. This increases the friction between the rotating block and the support frame, thus locking the support frame in place to prevent it from loosening and affecting the stability of the staircase support.

[0022] By sealing the air vents of the telescopic frame with a sealing block, the telescopic frame can be sealed to prevent air from escaping. This prevents the telescopic frame from contracting under the influence of the gas, thereby fixing the telescopic frame and improving the stability of the support frame.

[0023] By pulling the rope, the connecting rod and the rotating block are rotated. The rotating block drives the support frame to rotate and adjust, so that the support frame can fully contact the bottom of the stairs, improving the support effect on the stairs and thus improving the stability of the stairs. Attached Figure Description

[0024] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0025] Figure 2 This is a three-dimensional structural diagram of the support base, rotating base, and main rod of the present invention.

[0026] Figure 3 This is a cross-sectional perspective view of the telescopic frame of the present invention.

[0027] Figure 4 This is a three-dimensional structural diagram of the first screw, rotating frame, and main rod of the present invention.

[0028] Figure 5 This is a three-dimensional structural diagram of the first fixing block and support frame of the present invention.

[0029] Figure 6 This is a three-dimensional structural diagram of the second fixing block, the inclined block, and the trigger rod of the present invention.

[0030] Figure 7 This is a three-dimensional structural diagram of the F-type fixed block, rotating component, and belt of the present invention.

[0031] Figure 8This is a three-dimensional structural diagram of the second screw, rotating component, belt, and other parts of the present invention.

[0032] Figure 9 This is a three-dimensional structural diagram of the third fixing block and the fourth fixing block of the present invention.

[0033] Figure 10 This is a three-dimensional structural diagram of the connecting rod, rope, and limiting block of the present invention.

[0034] The above-mentioned figures include the following reference numerals: 101, support base; 102, rotating base; 103, first screw; 104, rotating frame; 105, main rod; 106, first bracket; 107, second bracket; 108, sliding rod; 109, telescopic frame; 110, connecting block; 111, second screw; 112, first fixing block; 113, rotating block; 114, support frame; 201, second fixing block; 202, inclined block; 203, linear spring; 204, trigger rod; 205, screw; 206, first torsion spring; 301, F-type fixing block; 302, rotating component; 303, belt; 304, third fixing block; 305, toothed component; 306, fourth fixing block; 307, closing block; 308, rotating shaft component; 401, second torsion spring; 402, connecting rod; 403, rope; 404, limiting block. Detailed Implementation

[0035] First, it should be noted that in different described embodiments, the same components are given the same reference numerals or the same component names. The disclosure contained throughout this specification can be applied semantically to the same components having the same reference numerals or the same component names. The location descriptions selected in the specification, such as upper, lower, lateral, etc., also refer to the directly described and illustrated figures and are semantically applied to the new location when the location changes.

[0036] Example 1: A prefabricated building construction diagonal support structure, please refer to... Figures 1-4 The staircase includes a support base 101, a rotating base 102, a first screw 103, a rotating frame 104, a main rod 105, and a support assembly. The main rod 105 is rotatably connected to the rotating frame 104 at both its upper and lower ends. The first screw 103 is threadedly connected to the inner ends of the two rotating frames 104. The rotating base 102 is rotatably connected to the outer ends of the two first screws 103. The support base 101 is fixedly connected to the outer ends of the two rotating bases 102. The main rod 105 is equipped with a support assembly for supporting the staircase.

[0037] The support assembly includes a first bracket 106, a second bracket 107, a sliding rod 108, a first fixing block 112, a rotating block 113, a support frame 114, and an adjustment assembly. The first bracket 106 is fixedly connected to the upper front side of the main rod 105, and the second bracket 107 is fixedly connected to the upper rear side of the main rod 105. The sliding rod 108 is slidably connected inside both the first bracket 106 and the second bracket 107. The first fixing block 112 is fixedly connected between the top right sides of the two sliding rods 108. The rotating block 113 is rotatably connected to the top of the first fixing block 112, and the support frame 114 is rotatably connected to the top of the rotating block 113. The sliding rod 108 is provided with an adjustment assembly, which is used to adjust the position of the support frame 114.

[0038] The adjustment assembly includes a telescopic frame 109, a connecting block 110, and a second screw 111. The telescopic frame 109 is rotatably connected between the right sides of the two sliding rods 108 and the lower part of the main rod 105. The connecting block 110 is fixedly connected to the left side of the front sliding rod 108. The second screw 111 is threadedly connected to the first bracket 106. The left side of the second screw 111 is rotatably connected to the connecting block 110.

[0039] To avoid the dangers of manual positioning during stair installation, the main rod 105 can be placed at the desired installation location. Then, the rotating frame 104 is rotated, causing the first screw 103 to move outwards, which in turn moves the rotating seat 102 and the support seat 101 outwards, bringing the support seat 101 into contact with the ceiling and floor, thus fixing the main rod 105. Next, the support frame 114 is adjusted according to the desired installation location of the staircase, and the second screw 111 is rotated, causing the sliding rod 108 to move... The system is dynamically adjusted, thereby moving the first fixed block 112, the rotating block 113, and the support frame 114. This positions the support frame 114 at the desired installation location for the staircase. The telescopic frame 109 is then adjusted adaptively before the staircase is installed. The support frame 114 positions the staircase and provides diagonal support, improving its stability, reducing tilting and swaying, and providing a safer experience for ascending and descending the stairs. This prevents instability when workers are using the stairs and avoids damage to the building, eliminating the need for later repairs. Workers can also rotate only the lower or upper rotating frame 104, or even both rotating frames 104, depending on the site conditions, to adjust the height of the support frame 114, improving practicality. For disassembly, the rotating frame 104 is reversed, causing the first screw 103 to move in opposite directions and reset, so that the support base 101 no longer presses against the ceiling and floor, allowing the entire diagonal support structure to be removed.

[0040] Example 2: Based on Example 1, please refer to... Figure 1 and Figures 5-10 It also includes a second fixing block 201, a wedge block 202, a linear spring 203, a trigger rod 204, a screw 205, and a first torsion spring 206. The second fixing block 201 is fixedly connected to the front side of the support frame 114. The wedge block 202 is slidably connected inside the second fixing block 201. The linear spring 203 is connected between the middle of the wedge block 202 and the bottom of the second fixing block 201. The screw 205 is threadedly connected to the lower front side of the support frame 114. The screw 205 rotates and contacts the rotating block 113. The trigger rod 204 is fixedly connected to the lower front side of the screw 205. The wedge block 202 contacts the trigger rod 204. The first torsion spring 206 is connected between the screw 205 and the support frame 114.

[0041] To prevent the support frame 114 from rotating due to the staircase during installation, thus affecting the stability of the support, the support frame 114 can be locked. When the staircase descends to contact the inclined block 202 during installation, the staircase presses the inclined block 202 downwards, stretching the linear spring 203, which in turn presses the trigger rod 204, causing the screw 205 to rotate. The first torsion spring 206 deforms, causing the screw 205 to move upwards and press against the rotating block 113, thereby increasing the size of the rotating block 113. The friction between the 13 and the support frame 114 achieves the purpose of locking the support frame 114 to prevent the support frame 114 from loosening and affecting the stability of the stair support. When not in use, during disassembly, the support frame 114 leaves the stair, the linear spring 203 resets, driving the inclined block 202 to move upward and reset, the first torsion spring 206 resets, driving the screw 205 to reverse and reset, and then driving the trigger rod 204 to reverse and reset, so that the screw 205 no longer abuts against the rotating block 113.

[0042] It also includes an F-type fixing block 301, a rotating component 302, a belt 303, a third fixing block 304, a toothed component 305, a fourth fixing block 306, a sealing block 307, and a rotating shaft 308. The F-type fixing block 301 is fixedly connected to the upper left side of the first bracket 106. The top of the second screw 111 has a sliding groove. The third fixing block 304 is fixedly connected to the lower front side of the main rod 105. The rotating shaft 308 is rotatably connected to the third fixing block 304. The rotating component 302 is fixedly connected to the rotating shaft 308. The rotating component 302 is rotatably connected inside the F-type fixing block 301. The upper rotating component 302 has a protruding interior. The second screw 111 is slidably connected to the groove of the second screw 111. The belt 303 is wound between the two rotating parts 302. The rotating shaft 308 is rotatably connected to the toothed part 305. The rotating part 302 rotates and contacts the toothed part 305. The fourth fixing block 306 is fixedly connected to the lower front side of the main rod 105. The fourth fixing block 306 is slidably connected to the sealing block 307. The upper part of the sealing block 307 is a V-shaped inclined surface. The V-shaped inclined surface of the sealing block 307 contacts the toothed part of the toothed part 305. The telescopic frame 109 is hollow inside. The telescopic frame 109 has an air hole on the left front side. The sealing block 307 blocks the air hole of the telescopic frame 109.

[0043] To prevent the support frame 114 from loosening due to the swaying of the stairs, the telescopic frame 109 can be fixed. When the second screw 111 rotates, it drives the rotating component 302 and the belt 303 to rotate, which in turn drives the rotating shaft 308 to rotate. The rotating shaft 308 drives the toothed component 305 to rotate, causing the toothed component 305 to move the sealing block 307 upward, so that the sealing block 307 no longer blocks the air hole of the telescopic frame 109, allowing the telescopic frame 109 to move freely with the stairs. The sliding rod 108 is used for telescopic adjustment. When the toothed member 305 rotates to the point where it no longer pushes against the sealing block 307, the sealing block 307 moves downward under its own gravity to reset and re-block the air hole of the telescopic frame 109. In this way, the telescopic frame 109 can be sealed to prevent the air inside the telescopic frame 109 from escaping. Thus, under the action of the gas, the telescopic frame 109 can be prevented from contracting, thereby achieving the purpose of fixing the telescopic frame 109 and improving the stability of the support frame 114.

[0044] It also includes a second torsion spring 401, a connecting rod 402, a rope 403, and a limiting block 404. The second torsion spring 401 is connected between the first fixed block 112 and the rotating block 113. The connecting rod 402 is fixed to the lower front side of the rotating block 113. The rope 403 is connected to the left side of the connecting rod 402. The rope 403 passes through the second bracket 107 on the right side. The limiting block 404 for limiting the rope 403 is fixed to the right side of the rope 403.

[0045] To avoid a gap between the support frame 114 and the stairs, which would affect the stability of the stair support, construction workers can manually pull the rope 403 to rotate the connecting rod 402, which in turn rotates the rotating block 113. The rotating block 113 then rotates the support frame 114, and the second torsion spring 401 adapts to the deformation, ensuring that the support frame 114 is fully in contact with the bottom of the stairs, thus improving the support effect and stability. After the support is finished, the support frame 114 leaves the stairs, the second torsion spring 401 resets, causing the rotating block 113 and the support frame 114 to reverse and reset, which in turn resets the connecting rod 402. The limiting block 404 limits the rope 403.

[0046] Example 3: Based on Example 2, a method for installing a prefabricated building construction diagonal support structure, the steps of which are as follows:

[0047] S1: First, place the main rod 105 at the staircase that needs support, and then rotate the rotating frame 104 so that the support seat 101 moves outward to contact the ceiling and floor to fix the main rod 105.

[0048] S2: Then rotate the second screw 111 to adjust the position of the support frame 114 so that the support frame 114 can provide positioning support for the stairs;

[0049] S3: As the staircase comes into contact with the inclined block 202, the inclined block 202 presses the trigger rod 204 to drive the screw 205 to rotate, causing the screw 205 to move and abut against the rotating block 113 to lock the support frame 114;

[0050] S4: The second screw 111 rotates, driving the rotating part 302 and the belt 303 to rotate. The belt 303 drives the rotating shaft 308 and the toothed part 305 to rotate, thereby pushing the closing block 307. The closing block 307 moves, and the telescopic frame 109 can be extended and retracted. When the closing block 307 is reset, the telescopic frame 109 can no longer be extended and retracted, thus locking the telescopic frame 109.

[0051] S5: Pull the rope 403 to drive the connecting rod 402 and the rotating block 113 to rotate and adjust the position of the support frame 114.

[0052] Although this disclosure has been described with respect to only a limited number of embodiments, those skilled in the art who benefit from this disclosure will understand that various other embodiments can be devised without departing from the scope of the invention. Therefore, the scope of the invention should be limited only by the appended claims.

Claims

1. A prefabricated building construction diagonal support structure, characterized in that, The system includes a support base (101), a rotating base (102), a first screw (103), a rotating frame (104), a main rod (105), and a support assembly. The main rod (105) is rotatably connected to the rotating frame (104) arranged symmetrically. The rotating frame (104) is threadedly connected to the first screw (103) in each of the symmetrically arranged rotating frames (104). The rotating base (102) is rotatably connected to the opposite side of the symmetrically arranged first screw (103). The support base (101) is fixedly connected to the opposite side of the symmetrically arranged rotating base (102). The main rod (105) is provided with a support assembly for supporting the staircase. The support assembly includes a first bracket (106), a second bracket (107), a sliding rod (108), a first fixed block (112), a rotating block (113), a support frame (114), and an adjustment component. The main rod (105) is fixedly connected to the first bracket (106). The second bracket (107) is fixedly connected to the side of the main rod (105) near the first bracket (106). The sliding rod (108) is slidably connected inside both the first bracket (106) and the second bracket (107). The first fixed block (112) is fixedly connected to the top of the sliding rod (108) away from the main rod (105). The rotating block (113) is rotatably connected to the top of the first fixed block (112). The support frame (114) is rotatably connected to the top of the rotating block (113). The sliding rod (108) is provided with an adjustment component for adjusting the position of the support frame (114). The adjustment assembly includes a telescopic frame (109), a connecting block (110), and a second screw (111). The sliding rod (108) arranged symmetrically is rotatably connected to the main rod (105) on the side away from the main rod (105) by the telescopic frame (109). The sliding rod (108) is fixedly connected to the connecting block (110) on the side away from the telescopic frame (109). The first bracket (106) is threadedly connected to the second screw (111), and the second screw (111) is rotatably connected to the connecting block (110). It also includes a second fixing block (201), a wedge block (202), a linear spring (203), a trigger rod (204), a screw (205), and a first torsion spring (206). The second fixing block (201) is fixedly connected to the side of the support frame (114). The wedge block (202) is slidably connected inside the second fixing block (201). The linear spring (203) is connected between the wedge block (202) and the bottom of the second fixing block (201). The screw (205) is threadedly connected to the side of the support frame (114) near the wedge block (202). The trigger rod (204) is fixedly connected to the screw (205). The first torsion spring (206) is connected between the screw (205) and the support frame (114).

2. The prefabricated building construction diagonal support structure according to claim 1, characterized in that, The inclined block (202) contacts the trigger rod (204), and the inclined block (202) moves downward to squeeze the trigger rod (204) and drive the screw (205) to rotate.

3. A prefabricated building construction diagonal support structure according to claim 2, characterized in that, The screw (205) rotates and contacts the rotating block (113), and the screw (205) rotates to abut against the rotating block (113) to lock the support frame (114).

4. A prefabricated building construction diagonal support structure according to claim 3, characterized in that, It also includes an F-type fixing block (301), a rotating component (302), a belt (303), a third fixing block (304), a toothed component (305), a fourth fixing block (306), a sealing block (307), and a rotating shaft (308). The first bracket (106) is fixedly connected to the F-type fixing block (301). The second screw (111) has a sliding groove. The main rod (105) is fixedly connected to the third fixing block (304) on the side near the telescopic frame (109). The third fixing block (304) is rotatably connected to the rotating shaft (308). The rotating shaft (308) is fixedly connected to the rotating component (302). The F-type fixing block (304) is fixedly connected to the rotating component (302). 1) The rotating component (302) is internally rotatably connected. The rotating component (302) is slidably connected to the groove of the second screw (111). The belt (303) is wound around the rotating component (302). The rotating shaft (308) is rotatably connected to the toothed component (305). The main rod (105) is fixed to the fourth fixing block (306) on the side near the toothed component (305). The fourth fixing block (306) is slidably connected to the sealing block (307). The telescopic frame (109) has an air hole on the side near the sealing block (307). The sealing block (307) blocks the air hole of the telescopic frame (109).

5. A prefabricated building construction diagonal support structure according to claim 4, characterized in that, The telescopic frame (109) is hollow inside.

6. A prefabricated building construction diagonal support structure according to claim 5, characterized in that, It also includes a second torsion spring (401), a connecting rod (402), a rope (403), and a limiting block (404). The second torsion spring (401) is connected between the first fixed block (112) and the rotating block (113). The connecting rod (402) is fixed to the rotating block (113). The rope (403) is connected to the connecting rod (402). The rope (403) passes through the second bracket (107). The limiting block (404) for limiting the rope (403) is fixed to the side of the rope (403) near the second bracket (107).

7. A method for installing a prefabricated building construction diagonal support structure, using the prefabricated building construction diagonal support structure as described in claim 6, characterized in that the steps are as follows: as follows: S1: First, place the main rod (105) at the staircase that needs support, and then rotate the rotating frame (104) so ​​that the support base (101) moves outward to contact the ceiling and floor to fix the main rod (105); S2: Then rotate the second screw (111) to adjust the position of the support frame (114) so ​​that the support frame (114) can provide positioning support for the stairs; S3: As the staircase comes into contact with the inclined block (202), the inclined block (202) presses the trigger rod (204) to drive the screw (205) to rotate, so that the screw (205) moves to abut against the rotating block (113) to lock the support frame (114); S4: The second screw (111) rotates, driving the rotating part (302) and the belt (303) to rotate. The belt (303) drives the rotating shaft (308) and the toothed part (305) to rotate, thereby pushing the closing block (307). The closing block (307) moves, and the telescopic frame (109) can be extended and retracted. When the closing block (307) resets, the telescopic frame (109) can no longer be extended and retracted, thus locking the telescopic frame (109). S5: Pull the rope (403) to drive the connecting rod (402) and the rotating block (113) to rotate and adjust the position of the support frame (114).

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