Gluing-free window frame

Abstract

The utility model discloses a gluing-free window frame in the technical field of window frames. The gluing-free window frame comprises transverse strips and vertical strips. The transverse strips and the vertical strips are combined to form a frame-shaped structure, and glass installation grooves used for installing glass are formed in the inner side faces of the frame-shaped structure. An inner mounting groove and an outer mounting groove are formed in the front side wall and the rear side wall of an inner cavity of the glass mounting groove correspondingly, and an inner sealing strip is embedded in the inner side of the inner mounting groove and makes contact with the side, facing the indoor space, of the glass. The inner side of the outer mounting groove is movably provided with an elastic sealing piece, the elastic sealing piece makes contact with the side, facing the outdoor space, of the glass, extrusion force is formed on the glass, and the glass is extruded on the inner sealing strip so that the glass can be fixed, according to the gluing-free window frame, the glass is fixed into the window frame through elasticity of the elastic sealing piece, gluing does not need to be conducted, and the sealing effect is good. And the glass can be effectively fixed, replacement and installation of the glass are facilitated, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of window frame technology, specifically to a glue-free window frame. Background Technology

[0002] Window frames are an important component of building doors and windows, primarily used to secure glass or other transparent materials, while also serving a supporting and decorative function. They are typically composed of horizontal and vertical bars, forming a rectangular or square frame structure. Window frames are made of various materials, commonly including wood, aluminum alloy, and PVC. Different materials offer different performance characteristics; for example, aluminum alloy frames are high-strength, corrosion-resistant, and lightweight, while PVC frames provide good thermal insulation and soundproofing. The structural design of window frames must balance strength, sealing, aesthetics, and ease of installation and maintenance to meet the needs of different buildings and usage scenarios.

[0003] In traditional window frame installation, glass is typically secured using caulking. While this method effectively seals and secures the glass to the frame, it also has several drawbacks. First, applying caulking requires significant time and effort, resulting in low efficiency. Second, the caulking process takes time to cure, further extending the installation cycle. Furthermore, removing the old caulking is cumbersome and can easily damage the window frame if the glass needs to be replaced. Therefore, achieving caulking-free fixing between the window frame and glass while ensuring a secure and airtight installation has become a pressing issue. Utility Model Content

[0004] The purpose of this utility model is to provide a glue-free window frame to solve the problems mentioned in the background art, such as the high time and effort required for applying glue, low construction efficiency, the time required for the glue to cure, which further prolongs the installation cycle, and the cumbersome process of removing the old glue when the glass needs to be replaced, which can easily damage the window frame.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a glue-free window frame, comprising horizontal and vertical strips;

[0006] The horizontal and vertical bars are combined to form a frame structure, and glass mounting grooves for installing glass are opened on the inner side of each frame.

[0007] The inner cavity of the glass mounting groove is provided with an inner mounting groove and an outer mounting groove on the front and rear side walls, respectively. An inner sealing strip is embedded in the inner side of the inner mounting groove, and the inner sealing strip contacts the side of the glass facing the interior.

[0008] An elastic seal is movably installed on the inner side of the outer mounting groove. The elastic seal contacts the outdoor side of the glass and exerts a compressive force on the glass, pressing the glass onto the inner sealing strip to fix the glass in place.

[0009] Preferably, the elastic seal includes an outer sealing strip, a movable block, and an elastic element;

[0010] The movable block is matched with the external mounting slot, and a gap is left between the movable block and the external mounting slot;

[0011] The outer sealing strip is detachably installed on the movable block on the side facing the inner mounting groove and in contact with the side of the glass facing the outside.

[0012] The elastic element is detachably installed on the movable block on the side away from the outer sealing strip and contacts the inner cavity sidewall of the outer mounting groove. The elastic force of the elastic element pushes the movable block toward the glass, causing the outer sealing strip to contact the glass, and pushing the glass toward the inner sealing strip to contact the inner sealing strip.

[0013] Preferably, the outer sealing strip is a water-swellable rubber strip;

[0014] The elastic element is a metal part that is bent in an S-shape.

[0015] Preferably, a water collection groove is provided on the inner side of the horizontal bar, and an installation groove is integrally formed on the inner cavity side wall of the water collection groove. A first connecting hole and a second connecting hole are respectively provided on the side wall of the installation groove.

[0016] The first connecting hole is connected to the inner cavity of the water collection tank, and the second connecting hole passes through the side wall of the horizontal bar facing the outside.

[0017] Preferably, a water pump is installed in the inner cavity of the mounting groove, and a water inlet pipe is installed at the water inlet end of the water pump. The water inlet pipe passes through the first connecting hole and is placed at the bottom of the inner cavity of the water collection tank.

[0018] The water pump is equipped with a drainage pipe at its drain end, and the drainage pipe passes through the second connection hole to discharge water to the outside.

[0019] Preferably, the end of the crossbar is integrally formed with a first toothed rack;

[0020] The end of the vertical bar is provided with a first connecting groove, and the first rack is inserted into the inner side of the first connecting groove and contacts the inner cavity sidewall of the first connecting groove.

[0021] The first connecting block is integrally formed on the side of the inner cavity of the first connecting groove away from the first toothed rack;

[0022] The inner rear wall of the first connecting groove is integrally formed with a connecting shaft.

[0023] Preferably, a locking assembly is movably mounted in the inner cavity of the first connecting groove, the locking assembly including a second rack, a rotating block, a connecting rod and a driving mechanism;

[0024] The second rack is inserted into the inner cavity of the first connecting groove, corresponding to the first rack;

[0025] One end of the rotating block is movably connected to the second rack via a pin, and the other end is movably connected to the first connecting block via a pin;

[0026] The connecting rod is movably connected to the second rack.

[0027] The drive mechanism is movably connected to the connecting rod.

[0028] Preferably, a second connecting block is integrally formed on the non-tooth surface of the second rack;

[0029] The bottom of the second rack has a second connecting groove.

[0030] Preferably, the connecting rod includes a rod, a first connector, and a second connector;

[0031] The first connector is integrally formed at one end of the rod, and the second connector is integrally formed at the other end of the rod;

[0032] The first connector is movably mounted inside the second connecting groove via a pin.

[0033] Preferably, the drive mechanism includes a turntable, a fixed groove, a rotating shaft, and a mounting base;

[0034] One end of the rotating shaft passes through the vertical bar and is movably connected to the connecting shaft via a bearing; the other end of the rotating shaft is located on the outer wall of the vertical bar and is flush with the side of the vertical bar facing the interior.

[0035] The turntable is integrally formed at the end of the rotating shaft and contacts the indoor side of the vertical bar;

[0036] A fixing groove is provided at the edge of the side wall of the turntable, and a fixing block can be detachably installed on the vertical bar at the position corresponding to the fixing groove on the indoor side;

[0037] The mounting base is integrally formed on the outer circumferential wall of the rotating shaft, and the second connector is movably connected to the mounting base via a pin.

[0038] Compared with the prior art, the beneficial effects of this utility model are:

[0039] (1) The glass is fixed inside the window frame by the elasticity of the elastic sealant, without the need for glue, which can effectively fix the glass, facilitate the replacement and installation of the glass, and improve work efficiency.

[0040] (2) The outer sealing strip is a water-swellable rubber strip. In rainy weather, after rainwater comes into contact with the outer sealing strip, the outer sealing strip expands upon contact with water, improving the rainproof effect and preventing rainwater from seeping into the room through the gap between the outer sealing strip and the glass, thus improving the waterproof effect.

[0041] (3) Since the glass is fixed by the elastic force of the elastic element, glass of different thicknesses can be installed within the elastic force range of the elastic element, thus improving the adaptability of glass installation.

[0042] (4) The rotating shaft drives the mounting base to rotate. The mounting base pulls the rod down by pulling the second connector. The rod pulls the second rack down by pulling the first connector. The teeth on the second rack move down along the inclined surface of the teeth on the first rack and mesh with the first rack. The horizontal and vertical bars are fixed together by the mutual meshing of the second and first racks. Compared with the traditional window frame assembly method, it is not necessary to fix it by applying glue or bolts. Just put the horizontal and vertical bars together and then rotate the turntable to fix the horizontal and vertical bars together, which improves work efficiency and reduces the labor intensity of the workers. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of this utility model;

[0044] Figure 2 This is a side sectional view of the horizontal bar of this utility model;

[0045] Figure 3 This is a schematic diagram of the elastic sealing element structure of this utility model;

[0046] Figure 4 This is a schematic diagram showing the connection between the horizontal and vertical bars of this utility model;

[0047] Figure 5 This is a schematic diagram of the installation of the horizontal bar and the first rack of this utility model;

[0048] Figure 6 This is a front sectional view of the vertical strip of this utility model;

[0049] Figure 7 This is a schematic diagram of the locking assembly structure of this utility model;

[0050] Figure 8 This is a schematic diagram of the connecting rod structure of this utility model;

[0051] Figure 9 This is a schematic diagram of the drive mechanism structure of this utility model;

[0052] Figure 10 This is a front sectional view of the horizontal bar of this utility model.

[0053] In the diagram: 100 Window frame, 110 Horizontal bar, 110a Inner mounting groove, 110b Outer mounting groove, 110c Inner sealing strip, 110d Elastic sealing element, 110d-1 Outer sealing strip, 110d-2 Moving block, 110d-3 Elastic element, 110e First rack, 110f Water collection groove, 110g Mounting groove, 110g-1 First connecting hole, 110g-2 Second connecting hole, 120 Vertical bar, 120a First connecting groove, 120b First Connecting block, 120c connecting shaft, 130 locking assembly, 130a second rack, 130a-1 second connecting block, 130a-2 second connecting groove, 130b rotating block, 130c connecting rod, 130c-1 rod, 130c-2 first connector, 130c-3 second connector, 130d drive mechanism, 130d-1 turntable, 130d-2 fixing groove, 130d-3 rotating shaft, 130d-4 mounting base, 200 glass. Detailed Implementation

[0054] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0055] This utility model provides a glue-free window frame. The glass is fixed inside the window frame by the elasticity of an elastic sealing element, eliminating the need for sealant. This effectively secures the glass, facilitates glass replacement and installation, and improves work efficiency. Please refer to [link / reference]. Figure 1 This includes the window frame 100 and the glass 200;

[0056] Example 1

[0057] Please see Figure 1-2 The window frame 100 includes horizontal bars 110 and vertical bars 120;

[0058] There are two horizontal bars 110, which are symmetrically arranged horizontally. There are two vertical bars 120, which are symmetrically arranged vertically. The two horizontal bars 110 and the two vertical bars 120 are combined to form a frame structure.

[0059] Both the horizontal bar 110 and the vertical bar 120 have glass mounting grooves on their inner sides for mounting the glass 200.

[0060] An inner mounting groove 110a and an outer mounting groove 110b are respectively provided on the front and rear side walls of the inner cavity of the glass mounting groove. The inner mounting groove 110a is located indoors, and the outer mounting groove 110b is located outdoors. The inner mounting groove 110a is a rectangular groove, and the outer mounting groove 110b is an I-shaped groove.

[0061] An inner sealing strip 110c is embedded on the inner side of the inner mounting groove 110a, and the inner sealing strip 110c contacts the indoor side of the glass 200.

[0062] An elastic seal 110d is movably installed on the inner side of the outer mounting groove 110b. The elastic seal 110d contacts the outdoor side of the glass 200. The elastic seal 110d is elastic and can exert a compressive force on the glass 200, pressing the glass 200 onto the inner sealing strip 110c to fix the glass 200. The glass 200 is fixed by using elasticity, without the need for sealant, which can effectively fix the glass, facilitate the replacement and installation of the glass, and improve work efficiency.

[0063] Example 2

[0064] Please see Figure 1-3 The elastic seal 110d includes an outer sealing strip 110d-1, a moving block 110d-2, and an elastic element 110d-3;

[0065] The movable block 110d-2 has an I-shaped structure and matches the outer mounting groove 110b. There is a gap between the movable block 110d-2 and the outer mounting groove 110b, which can accommodate the movable block 110d-2 to move back and forth inside the outer mounting groove 110b.

[0066] The outer sealing strip 110d-1 is detachably installed on the movable block 110d-2. The side facing the inner mounting groove 110a contacts the side of the glass 200 facing the outside. The outer sealing strip 110d-1 is a water-swellable strip. In rainy weather, after rainwater comes into contact with the outer sealing strip 110d-1, the outer sealing strip 110d-1 expands upon contact with water, improving the rainproof effect and preventing rainwater from seeping into the room through the gap between the outer sealing strip 110d-1 and the glass 200, thus improving the waterproof effect.

[0067] The elastic element 110d-3 is detachably installed on the side of the movable block 110d-2 away from the outer sealing strip 110d-1. The elastic element 110d-3 is a metal part with an S-shaped bend. The elastic element 110d-3 is inserted into the inner side of the outer mounting groove 110b and contacts the inner cavity sidewall of the outer mounting groove 110b.

[0068] The elastic force of the elastic element 110d-3 pushes the moving block 110d-2 toward one side of the glass 200. The moving block 110d-2 then drives the outer sealing strip 110d-1 toward one side of the glass 200 and into contact with the outdoor side of the glass 200. It also pushes the glass 200 toward the inner sealing strip 110c and into contact with the inner sealing strip 110c, thus fixing the glass and facilitating replacement and installation. At the same time, since the glass 200 is fixed by the elastic force of the elastic element 110d-3, glass 200 of different thicknesses can be installed within the elastic force range of the elastic element 110d-3, improving the adaptability of glass installation.

[0069] Example 3

[0070] Please see Figure 1-2 and Figure 10 The bottom horizontal bar 110 has a water collection trough 110f on its inner side. The bottom of the water collection trough 110f is recessed. After rainwater seeps in, it will accumulate in the recessed position at the bottom of the water collection trough 110f.

[0071] The inner cavity sidewall of the water collection tank 110f is integrally formed with an installation groove 110g, and a first connecting hole 110g-1 and a second connecting hole 110g-2 are respectively opened on the sidewall of the installation groove 110g.

[0072] The first connecting hole 110g-1 is in communication with the inner cavity of the water collection tank 110f, and the second connecting hole 110g-2 penetrates the side wall of the horizontal bar 110 facing the outside.

[0073] A water pump is installed in the inner cavity of the mounting slot 110g. A water inlet pipe is installed at the water inlet end of the water pump. The water inlet pipe passes through the first connecting hole 110g-1 and is placed in the recessed position at the bottom of the inner cavity of the water collection tank 110f to extract the water accumulated in the recessed position at the bottom of the inner cavity of the water collection tank 110f.

[0074] The water pump is equipped with a drainage pipe at its drain end. The drainage pipe passes through the second connection hole 110g-2 to discharge water to the outside, enabling autonomous drainage. This further prevents rainwater from seeping into the room and further ensures the waterproof effect.

[0075] Example 4

[0076] Please see Figure 4-9 The end of the horizontal bar 110 is integrally formed with a first toothed rack 110e;

[0077] The mop of the vertical bar 120 has a first connecting groove 120a, and the first rack 110e is inserted into the inner side of the first connecting groove 120a and contacts the inner cavity side wall of the first connecting groove 120a.

[0078] The first connecting block 120b is integrally formed on the side of the inner cavity of the first connecting groove 120a away from the first rack 110e;

[0079] The inner rear wall of the first connecting groove 120a is integrally formed with a connecting shaft 120c;

[0080] A locking assembly 130 is movably installed in the inner cavity of the first connecting groove 120a. The locking assembly 130 includes a second rack 130a, a rotating block 130b, a connecting rod 130c, and a drive mechanism 130d.

[0081] The second rack 130a is inserted into the inner cavity of the first connecting groove 120a and corresponds to the first rack 110e;

[0082] A second connecting block 130a-1 is integrally formed on the non-tooth surface of the second rack 130a, and the second connecting block 130a-1 corresponds to the first connecting block 120b.

[0083] One end of the rotating block 130b is movably connected to the second connecting block 130a-1 via a pin, and the other end is movably connected to the first connecting block 120b via a pin. The second rack 130a moves up and down on the arc surface through the cooperation of the rotating block 130b, the second connecting block 130a-1 and the first connecting block 120b.

[0084] The bottom of the second rack 130a is provided with a second connecting groove 130a-2;

[0085] The connecting rod 130c is movably connected to the second rack 130a through the second connecting groove 130a-2;

[0086] The connecting rod 130c includes a rod 130c-1, a first connector 130c-2, and a second connector 130c-3;

[0087] The first connector 130c-2 is integrally formed at the end of the rod 130c-1, and the second connector 130c-3 is integrally formed at the other end of the rod 130c-1;

[0088] The first connector 130c-2 is movably mounted on the inside of the second connecting groove 130a-2 via a pin.

[0089] The drive mechanism 130d is movably connected to the vertical bar 120 and passes through the vertical bar 120, inserting into the inner side of the first connecting groove 120a and movably connected to the connecting shaft 120c.

[0090] The drive mechanism 130d includes a turntable 130d-1, a fixed groove 130d-2, a rotating shaft 130d-3, and a mounting base 130d-4;

[0091] One end of the rotating shaft 130d-3 passes through the vertical bar 120 and is movably connected to the connecting shaft 120c via a bearing. The other end of the rotating shaft 130d-3 is set on the outer wall of the vertical bar 120 and is flush with the indoor side of the vertical bar 120.

[0092] The turntable 130d-1 is integrally formed at the end of the rotating shaft 130d-3 and contacts the indoor side of the vertical bar 120. The rotating shaft 130d-3 can be manually driven to rotate through the turntable 130d-1.

[0093] A fixing groove 130d-2 is provided at the edge of the side wall of the turntable 130d-1, and a fixing block can be detachably installed on the vertical bar 120 at the position corresponding to the fixing groove 130d-2 on the indoor side.

[0094] In actual use, remove the fixing block and manually rotate the turntable 130d-1. The turntable 130d-1 drives the rotating shaft 130d-3 to rotate. When the fixing groove 130d-2 on the turntable 130d-1 corresponds to the position of the original fixing block, install the fixing block on the vertical bar 120 and lock it inside the fixing groove 130d-2 to limit and fix the turntable 130d-1.

[0095] Mounting base 130d-4 is integrally formed on the outer circumferential wall of rotating shaft 130d-3, and second connector 130c-3 is movably connected to mounting base 130d-4 via pin.

[0096] The rotation of the rotating shaft 130d-3 drives the mounting base 130d-4 to rotate. The mounting base 130d-4 pulls the rod 130c-1 downward by pulling the second connector 130c-3. The rod 130c-1 pulls the second rack 130a downward by the first connector 130c-2. The teeth on the second rack 130a move down along the inclined surface of the teeth on the first rack 110e and mesh with the first rack 110e. The mutual meshing of the second rack 130a and the first rack 110e fixes the horizontal bar 110 and the vertical bar 120 together. Compared with the traditional window frame assembly method, it does not require fixing with glue or bolts. It only requires assembling the horizontal bar 110 and the vertical bar 120 together and then rotating the turntable 130d-1 to fix the horizontal bar 110 and the vertical bar 120 together, which improves work efficiency and reduces the labor intensity of workers.

[0097] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A glazing bead, characterised in that: The horizontal strip (110) and the vertical strip (120) are combined into a frame-shaped structure, and the inner side of the frame-shaped structure is provided with a glass mounting groove for mounting the glass (200); The inner cavity of the glass mounting groove is provided with an inner mounting groove (110a) and an outer mounting groove (110b) on the front and rear side walls respectively, the inner side of the inner mounting groove (110a) is inlaid with an inner sealing strip (110c), and the inner sealing strip (110c) is in contact with the indoor side of the glass (200); The inner side of the outer mounting groove (110b) movably mounts an elastic sealing element (110d), the elastic sealing element (110d) is in contact with the outdoor side of the glass (200), and the elastic sealing element (110d) forms a pressing force on the glass (200) to press the glass (200) on the inner sealing strip (110c) to fix the glass (200). The elastic sealing element (110d) includes an outer sealing strip (110d-1), a moving block (110d-2) and an elastic element (110d-3); 2. A window frame of claim 1, wherein: The moving block (110d-2) is matched with the outer mounting groove (110b), and a gap is left between the moving block (110d-2) and the outer mounting groove (110b); The outer sealing strip (110d-1) is detachably mounted on the moving block (110d-2) on the side facing the inner mounting groove (110a), and is in contact with the outdoor side of the glass (200); The elastic element (110d-3) is detachably mounted on the moving block (110d-2) on the side away from the outer sealing strip (110d-1), and is in contact with the inner cavity side wall of the outer mounting groove (110b), the elastic element (110d-3) pushes the moving block (110d-2) to move towards the side of the glass (200) through the elastic force of the elastic element (110d-3), drives the outer sealing strip (110d-1) to contact the glass (200), and pushes the glass (200) to move towards the inner sealing strip (110c) and contact the inner sealing strip (110c). The outer sealing strip (110d-1) is a water-swelling adhesive tape; 3. A window frame of claim 2, wherein: The elastic element (110d-3) is an S-shaped metal piece. The inner side of the horizontal strip (110) is provided with a water collecting groove (110f), the inner cavity side wall of the water collecting groove (110f) is integrally formed with a mounting groove (110g), and the side wall of the mounting groove (110g) is respectively provided with a first connecting hole (110g-1) and a second connecting hole (110g-2); 4. The window frame of claim 1, wherein: The first connecting hole (110g-1) is in communication with the inner cavity of the water collecting groove (110f), and the second connecting hole (110g-2) penetrates the outdoor side wall of the horizontal strip (110). A water pump is mounted in the inner cavity of the mounting groove (110g), a water inlet pipe is mounted at the water inlet end of the water pump, and the water inlet pipe is placed in the inner cavity bottom of the water collecting groove (110f) through the first connecting hole (110g-1); 5. A window frame of claim 4, wherein: A water outlet pipe is mounted at the water outlet end of the water pump, and the water outlet pipe discharges water to the outdoor through the second connecting hole (110g-2). The end of the horizontal strip (110) is integrally formed with a first rack (110e); 6. A window frame of claim 1, wherein: ​ An end of the vertical strip (120) is provided with a first connecting groove (120a), the first rack (110e) is inserted into the inner side of the first connecting groove (120a) and is in contact with the inner cavity side wall of the first connecting groove (120a); The inner cavity of the first connecting groove (120a) is integrally formed with a first connecting block (120b) on the side away from the first rack (110e); The inner cavity rear side wall of the first connecting groove (120a) is integrally formed with a connecting shaft (120c).

7. A window frame of claim 6, wherein: A lock assembly (130) is movably mounted in the inner cavity of the first connecting groove (120a), and the lock assembly (130) comprises a second rack (130a), a rotating block (130b), a connecting rod (130c) and a driving mechanism (130d); The second rack (130a) is inserted into the inner cavity of the first connecting groove (120a) corresponding to the first rack (110e); One end of the rotating block (130b) is movably connected to the second rack (130a) through a pin shaft, and the other end is movably connected to the first connecting block (120b) through a pin shaft; The connecting rod (130c) is movably connected to the second rack (130a); The driving mechanism (130d) is movably connected to the connecting rod (130c).

8. A window frame of claim 7, wherein: A second connecting block (130a-1) is integrally formed on the non-tooth surface of the second rack (130a); A second connecting groove (130a-2) is formed in the bottom of the second rack (130a).

9. A window frame of claim 7, wherein: The connecting rod (130c) comprises a rod (130c-1), a first connecting head (130c-2) and a second connecting head (130c-3); The first connecting head (130c-2) is integrally formed at one end of the rod (130c-1), and the second connecting head (130c-3) is integrally formed at the other end of the rod (130c-1); The first connecting head (130c-2) is movably mounted on the inner side of the second connecting groove (130a-2) through a pin shaft.

10. A window frame of claim 9, wherein: The driving mechanism (130d) comprises a rotating disc (130d-1), a fixed groove (130d-2), a rotating shaft (130d-3) and a mounting seat (130d-4); One end of the rotating shaft (130d-3) penetrates through the vertical strip (120) and is movably connected to the connecting shaft (120c) through a bearing, and the other end of the rotating shaft (130d-3) is arranged on the outer side wall of the vertical strip (120) and is flush with the indoor side of the vertical strip (120); The rotating disc (130d-1) is integrally formed at the end of the rotating shaft (130d-3) and is in contact with the indoor side of the vertical strip (120); The fixed groove (130d-2) is formed at the side wall edge of the rotating disc (130d-1), and a fixed block is detachably mounted on the position corresponding to the fixed groove (130d-2) on the indoor side of the vertical strip (120); The mounting seat (130d-4) is integrally formed on the circumferential outer side wall of the rotating shaft (130d-3), and the second connecting head (130c-3) is movably connected to the mounting seat (130d-4) through a pin shaft.

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