Window protective fence

Abstract

The utility model relates to the technical field of doors and windows, in particular to a window protective guard which comprises a frame and purlines, the frame comprises frame strips and connecting pieces, and the frame strips are connected through the connecting pieces to form the frame in a surrounding mode; the purline is arranged on the frame, connecting sleeves are arranged at the two ends of the purline, and a cavity is formed in the frame strip and used for containing the connecting sleeves. Through the unique structural layout, the stability and durability of the product are enhanced, the overall performance is improved, the reliability of long-term use is ensured, unnecessary material piling is avoided, and reasonable distribution and high-efficiency use of materials are achieved. Through the modular design of the components, the transportation size and weight are reduced, and then the transportation cost is reduced; the flexible disassembly and assembly mode enables products to adapt to different transportation requirements, the logistics process is simplified, and the transportation difficulty and cost are reduced. And the recoverability of the product is considered, so that the waste assembly can be efficiently disassembled and reused, the life cycle value of the product is improved, and sustainable utilization of resources is promoted.

Description

Technical Field

[0001] The present application relates to the technical field of doors and windows, and in particular to a window guardrail. Background Art

[0002] As an important part of a building, windows not only undertake the functions of lighting and ventilation, but are also closely related to the aesthetics and safety of the building. As an additional safety component of the window, the design and manufacturing quality of the window guardrail is directly related to the safety of the occupants. At present, the common window guardrails on the market generally adopt the oblique docking technology of the window sash and are fixed with self-tapping screws to ensure the stability and reliability of the guardrail.

[0003] The Chinese patent with authorization announcement number CN 217206210 U discloses a window guardrail installation structure, including a frame and a guardrail, wherein the frame is provided with installation grooves on two opposite inner side walls, wherein the installation grooves extend along the length direction of the inner side walls, and an installation plate is fixed to the end of the guardrail, wherein the installation plate is plugged into the installation groove, and a slot is provided on the side wall of the installation groove facing the interior of the house, wherein the slot is connected to the installation groove, and a limit member is inserted into the slot, wherein the limit member abuts against the installation plate, and a gap is left between the limit member and the bottom of the installation groove.

[0004] Although the above patents and other existing technologies meet the basic functional requirements of window guardrails to a certain extent, there are several major problems in practical applications:

[0005] High dimensional accuracy requirements: The existing window guardrail structure requires extremely high dimensional accuracy. During the production process, any slight error may cause the guardrail to fail to fit the window, resulting in the scrapping of raw materials. This not only reduces production efficiency, but also significantly increases the overall production cost.

[0006] Low recycling value: Due to the structural characteristics of existing window guardrails, once they need to be replaced or removed, their recycling value is greatly reduced. This not only causes a waste of resources, but is also not conducive to environmental protection and sustainable development.

[0007] Large transportation volume: During transportation, the existing window guardrails have a large volume, especially the hollow part, which takes up a lot of transportation space. This not only increases transportation costs, but also reduces logistics efficiency. Utility Model Content

[0008] In view of one or more problems existing in the prior art, the present application provides a window guardrail, comprising a frame and a purlin, wherein the frame comprises frame bars and a connecting piece, wherein the connecting piece connects the frame bars to form the frame; the purlin comprises a connecting sleeve, wherein the connecting sleeve is used to connect the frame and the purlin;

[0009] The frame strip comprises an outer shell and an inner plate, wherein the outer shell and the inner plate are plugged together to form a frame strip having a cavity, and the cavity is used to accommodate the connecting sleeve;

[0010] The connecting piece includes an angle piece, a screw and a fixing code, and the fixing code is fixed to the angle piece by the screw to form a fixing code-angle piece-fixing code structure; the connecting piece is arranged in the cavity of the two frame strips to connect the two frame strips; the outer shell is provided with a limiting hole at the screw, and the nut of the screw is clamped in the limiting hole to realize the fixation of the overall structure.

[0011] According to a window guardrail proposed in an embodiment of the present application, grooves are provided at both ends of the purlin to enable the purlin to be tightly combined with the connecting sleeve.

[0012] According to a window guardrail provided in an embodiment of the present application, there is an adjustable space at the installation position of the fixing code on the corner assembly.

[0013] According to a window guardrail provided in an embodiment of the present application, a side of the fixing code in contact with the corner assembly piece is provided with an anti-slip surface.

[0014] According to a window guardrail proposed in an embodiment of the present application, the shape of the connecting sleeve is the same as the shape of the cavity of the frame bar; the connecting sleeve is arranged to fit the cavity wall to disperse the force of the purlin to the frame.

[0015] According to a window guardrail proposed in an embodiment of the present application, the inner plate is provided with a limiting opening for fixing the purlin.

[0016] According to a window guardrail proposed in an embodiment of the present application, at least one end of the inner plate is provided with an opening, and the inner plates are spliced ​​so that the openings are butted together to form the limiting opening.

[0017] One or more of the above embodiments of the present application have at least the following beneficial effects:

[0018] Comprehensive performance improvement: This application enhances the stability and durability of the product through a unique structural layout, significantly improves the overall performance, ensures reliability for long-term use, avoids unnecessary material stacking, and achieves reasonable distribution and efficient use of materials.

[0019] Reduced transportation costs and increased flexibility in transportation methods: This application reduces transportation volume and weight, thereby reducing transportation costs, through modular design of components; flexible disassembly methods enable the product to adapt to different transportation needs, simplify the logistics process, and reduce transportation difficulty and costs.

[0020] Recycling and recirculation value enhancement: This design takes special consideration of the recyclability of the product, so that waste components can be efficiently disassembled and reused, improving the product's life cycle value and promoting the sustainable use of resources.

[0021] Improved material utilization: According to different usage requirements, the materials used for window guardrails are adjusted to ensure the optimal utilization of materials, effectively save costs, and provide greater flexibility for the diversified design of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings:

[0023] Figure 1 This is an overall structural diagram of a window guardrail in one direction provided according to an embodiment of the present application;

[0024] Figure 2 is a cutaway perspective view of a corner structure of a window guardrail provided according to an embodiment of the present application;

[0025] Figure 3 is a structural diagram of a connection member of a window guardrail provided in an embodiment of the present application in one direction;

[0026] Figure 4 is a structural diagram of another direction of the connecting member of the window guardrail provided in an embodiment of the present application;

[0027] Figure 5 is a cross-sectional view at an angle of a frame of a window guardrail provided in an embodiment of the present application;

[0028] Figure 6 is a schematic diagram of a purlin structure of a window guardrail provided according to an embodiment of the present application;

[0029] Figure 7 It is a schematic diagram of the installation of purlins of a window guardrail provided in an embodiment of the present application;

[0030] Figure 8 is a partial structural schematic diagram of another direction of the window guardrail provided in an embodiment of the present application;

[0031] Fig. 9 It is a three-dimensional assembly diagram of a window guardrail provided according to an embodiment of the present application.

[0032] Reference numerals:

[0033] 100, frame; 110, frame strip; 111, cavity; 112, outer shell; 113 inner plate; 114 limiting hole; 115, limiting opening;

[0034] 120, connector; 121, corner piece; 122, screw; 123, fixing code;

[0035] 130, corner sealing;

[0036] 200, purlin; 210, connecting sleeve; 220, groove. DETAILED DESCRIPTION

[0037] Embodiments of the present application will be described in detail below, examples of which are shown in the accompanying drawings, and the components of the embodiments of the present application generally described and shown in the accompanying drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the application claimed for protection, but merely represents selected embodiments of the present application.

[0038] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of this application.

[0039] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0040] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] The following will be combined Figures 1 to 9 The technical solution of the present application is described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments.

[0042] An embodiment of the present application provides a window guardrail, including a frame 100 and a purlin 200 .

[0043] The frame 100 includes a frame strip 110 and a connector 120, and the connector 120 connects the frame strip 110 to form the frame 100. The purlin 200 is arranged on the frame 100, and the two ends of the purlin 200 are provided with a connecting sleeve 210, and the frame strip 110 forms a cavity 111 for accommodating the connecting sleeve 210.

[0044] The present application does not limit the number and degree of curvature of the frame bars 110, as long as they can be connected by the connector 120 to form a closed frame 100. In some specific examples, two curved frame bars 110 can be connected by the connector 120 to form a closed frame 100; or three, four, five, or other straight frame bars 110 or frame bars 110 with a certain degree of curvature can be used to form a closed frame 100.

[0045] In a specific example of this application, see Figure 1 to Figure 3 The four straight-line frame strips 110 are connected by the connecting piece 120 to form a frame 100 .

[0046] The purlins 200 can be arranged evenly or unevenly, and this application does not limit this; in addition, this application does not limit the number of purlins 200 and the spacing between two adjacent purlins 200, and the spacing can be adjusted according to the needs of the use scenario, such as protecting pets from falling, protecting the elderly from falling, etc. In addition, the purlins 200 can be arranged only at some positions on the frame 100 to achieve better transparency and meet the needs of use in different scenarios. In some specific examples, the common setting spacing is 5cm, 10cm, 11cm, 15cm, etc.

[0047] The purlin 200 can be arranged on the frame 100 horizontally or vertically, or arranged on the frame 100 in other directions, so as to properly fill the space inside the frame 100. By arranging the purlin 200 in the middle of the frame 100, it can play a role of interception and protection.

[0048] This application does not impose any restrictions on the thickness of the purlin 200. Common thicknesses include 4 mm, 6 mm, 8 mm and other specifications, which can be selected according to actual installation scenarios such as kitchens, balconies, and living rooms.

[0049] The connecting sleeve 210 wraps around both ends of the purlin 200 and is connected by hot-melt welding. Hot-melt welding is a conventional technical means in the art and is well known to those skilled in the art and will not cause damage to the purlin 200 or the connecting sleeve 210 .

[0050] The purlin 200 and the connecting sleeve 210 may be made of the same material, such as polycarbonate, ABS, nylon, resin or other plastic materials.

[0051] Preferably, the thickness of the purlin 200 is 4 mm, and the material is polycarbonate. It is well known to those skilled in the art that the commonly used material for police riot shields is also polycarbonate, and its standard thickness is 3 mm, and its protective performance is sufficient to resist the attack of adults. It can be seen that the purlin 200 used in the embodiment of the present application can achieve a good protective effect.

[0052] The frame 100 may be made of aluminum alloy material to ensure overall strength, withstand the force dispersed by the purlin 200, reduce the damage rate of the frame, and increase the service life.

[0053] The window guardrail disclosed in the present application can select the material and thickness of the purlin 200 according to the objects to be protected, such as the elderly, adults, children, pets, etc., and the protection scenes, such as the living room, kitchen, or other high-altitude work scenes, so as to ensure the optimal utilization of materials, effectively save costs, and provide greater flexibility for the diversified design of products.

[0054] In some embodiments of the present application, the connecting sleeve 210 can be a sheet metal fastener, and connected to the purlin 200 by hot pressing and inlaying. The sheet metal fastener is heated, and then the metal fastener is fastened into a low melting point material such as polycarbonate, resin, nylon, acrylic, etc. by a certain molding. This method will not form a tear on the surface of the material, so the anti-friction effect will be better.

[0055] The connecting sleeve 210 is located in the cavity 11 of the frame 100. When the purlin 200 is subjected to force, the two ends of the purlin 200 will be forced to gather toward the middle. The connecting sleeve 210 exists inside the frame 100 and fits with the cavity wall of the cavity 111, which will evenly distribute the forced force to the frame 100, thereby achieving a stronger impact resistance effect. In the prior art, a self-tapping screw fixing method is usually adopted, that is, the purlin is fixed to the frame by drilling through and locking multiple layers of materials. This method destroys the integrity of the frame and purlin materials themselves, and from the analysis of stress distribution, only the tearing force is generated between the drilled part of the material and the screws, and its impact strength is poor.

[0056] In a specific example of this application, see Figure 1 In the embodiment of the present application, the purlin 200 is transversely arranged on the frame 100, and the interval between two adjacent purlins 200 is 10 cm.

[0057] Furthermore, the connecting member 120 includes an angle piece 121 and a screw 122 . The angle piece 121 is inserted into the cavity 111 of the two frame bars 110 to connect the two frame bars 110 . The connected frame bars 110 are fixed by the screw 122 .

[0058] The corner piece 121 can be any acute angle, right angle or obtuse angle, as long as the frame strips 110 can be enclosed and connected into a desired shape. The present application does not limit the length of the two sides of the corner piece 121, so as to facilitate the fixed connection of the two frame strips 110.

[0059] The present application does not limit the number of screws 122. The types of screws 122 can be selected from 3M hexagon socket screws, flat head screws, round head screws, etc., so long as they can fix the connected frame strips 110.

[0060] In a specific example of this application, see Figure 2 — Figure 4 The corner piece 121 is specifically a right-angle corner piece, and the screw 122 is specifically a hexagon socket screw. The two sides of the corner piece 121 are respectively inserted into the cavity 111 of the frame strip 110 and fixed by the screw 122, that is, the two frame strips 110 are successfully connected. Similarly, multiple frame strips 110 are connected to form Figure 1 The outer frame 100 is shown.

[0061] Furthermore, the frame strip 110 includes an outer shell 112 and an inner plate 113 , which are plugged into each other to form a frame strip 110 having a cavity 111 ; the outer shell 112 is provided with a limiting hole 114 at the screw 122 , and part of the screw 122 is snapped into the limiting hole 114 .

[0062] The present application does not limit the shape of the outer shell 112 and the inner plate 113, which is determined according to the usage scenario. When the window to be protected is circular or other shapes, an outer shell and an inner plate with different curvatures can be used. The frame strips with a smooth outer surface and a rectangular shape after splicing usually meet the needs of most usage scenarios.

[0063] The outer shell 112 and the inner plate 113 are assembled by flexible connection methods such as plug-in, snap-fit, wedge connection, etc., so as to facilitate disassembly, transportation or replacement of accessories after a part is damaged.

[0064] The shape of the cavity 111 is not limited in the present application. One of the functions of the cavity 111 is to cooperate with the corner assembly 121 to connect the two frame strips 110 .

[0065] The limiting hole 114 on the housing 112 is located at the screw 122, which is convenient for loosening and tightening the screw 122, thereby facilitating the disassembly or assembly of the entire window guardrail. At the same time, through the limiting hole 114, the nut or part of the screw body of the screw 122 is stuck in the limiting hole 114, further strengthening the connection between the frame strip 110 and the corner assembly 121, and enhancing the stability of the window guardrail.

[0066] In a specific example of this application, see Figure 5The outer shell 112 is a C-shaped structure, and the inner plate 113 is clamped to the inner side of the outer shell 112 to form a frame bar 110 having a cavity 111. Figure 2 The nut of the screw 122 is just embedded in the limiting hole 114, thereby achieving immovable overall fixation.

[0067] Furthermore, a limiting opening 115 is provided on the inner plate 113 for fixing the purlin 200 .

[0068] The setting position of the limit opening 115 is based on the setting direction of the purlin 200. When the purlin 200 is longitudinally set on the frame 100, the limit opening 115 can be set on the inner plate 113 of the transverse frame strip 110 of the frame 100; when the purlin 200 is transversely set on the frame 100, the limit opening 115 can also be set on the inner plate 113 of the longitudinal frame strip 110 of the frame 100.

[0069] The length and width of the limiting opening 115 are determined by the length and width of the purlin 200 , so that the purlin 200 can be firmly fixed on the frame 100 .

[0070] Furthermore, at least one end of the inner plate 113 is provided with an opening, and the openings of the two inner plates 113 are butted against each other to form a limiting opening 115 .

[0071] In a specific example of this application, see Figure 7-Figure 9 The two inner plates 113 of the longitudinal frame bar 110 of the frame 100 are provided with openings. The purlin 200 is slidably nested from one end of the longitudinal frame bar 110 to the opening of the inner plate 113 below, and then the other inner plate 113 is slid downward to fasten the purlin 200, so that the two openings are correspondingly spliced ​​to form a limit opening 115 for fixing the purlin 200. The structure after fixing is as shown Figure 8 shown.

[0072] The present application does not limit the number of inner panels 113 , and multiple inner panels 113 may be spliced ​​together to form multiple limit openings, as long as they can ultimately be assembled with the outer shell 112 .

[0073] Furthermore, the connecting member 120 further includes a fixing code 123 , and the screw 122 fixes the fixing code 123 and the corner assembly member 121 to form a fixing code-corner assembly member-fixing code structure.

[0074] The fixing code 123 is arranged on two sides of the corner assembly 121, and at least one set of fixing code-corner assembly-fixing code structure is formed on each side of the corner assembly 121. The fixing code 123 may be provided with a rough surface on the side facing the corner assembly 121 to increase the friction between the two. The use of the fixing code 123 is used in that, on the one hand, the screw 122 can be fixed by the fixing code 123 to enhance the fixing strength, and on the other hand, the screw 122 is fixed by the fixing code 123. When there is a slipping or damage, the fixing code 123 can be directly replaced without replacing the corner assembly 121, so as to save costs.

[0075] In a specific example of this application, see Figure 3 A set of fixing codes 123 are installed on both sides of the right-angled corner piece 121 and fixed by hexagon socket screws 122. Figure 4 Each set of fixing codes includes an upper fixing code and a lower fixing code, which are nested on the edge of the corner assembly 121, and the upper and lower fixing codes are provided with a rough surface on one side close to the corner assembly 121 to increase the friction force, and finally fixed by the hexagon socket screw 122. The installed hexagon socket screw 122 has a protruding nut on the fixing code 123, which is used to clamp on Figure 2 The limiting holes 114 shown enhance the overall stability.

[0076] Furthermore, there is an adjustable space at the installation position of the fixing code 123 on the corner assembly piece 121 .

[0077] There is an adjustable space on the corner assembly 121, such as Figure 3 As shown, the fixing code 123 can be moved along the length direction on the two sides of the corner assembly 121, and its function is to change the fixing position of the screw 122, that is, when there is an error in the length of the frame strip 110, the fixing code 123 can be adjusted to assemble, which reduces the manufacturing accuracy requirements of the frame strip 110. At the same time, it is more convenient to install and disassemble, and can better adapt to windows of different sizes.

[0078] The present application does not limit the size of the adjustable space, and a 5 mm adjustable space is generally used. In one embodiment of the present application, Figure 1-Figure 3 As shown, the movable range of each corner of the corner assembly 121 in the longitudinal and transverse directions is ±5 mm. When the four corner assembly pieces 121 are adjusted in a circle, the height can float by 10 mm and the width can float by 10 mm.

[0079] The present application does not limit the shape of the fixing code 123, but in order to allow space for the fixing code 123 to move on the two sides of the corner piece 121, the shape of the fixing code 123 can be coordinated with the shapes of the two sides of the corner piece, so that the fixing code 123 fits on the edge of the corner piece 121, which is conducive to its sliding on the edge of the corner piece 121.

[0080] In a specific example of this application, see Figure 3 A set of fixing codes 123 are respectively installed on the two sides of the right-angled corner piece 121. The two sets of fixing codes 123 can be slidably adjusted according to the directions of the arrows, and the adjustable range is 5 mm.

[0081] Furthermore, grooves 220 are provided at both ends of the purlin 200 for tightly combining the purlin 200 with the connecting sleeve 210 .

[0082] The present application does not limit the number, width, and depth of the grooves 220. In some specific examples, 1, 2, or the like grooves may be provided at both ends of the purlin 200. The grooves 220 may be provided on the same side of one end of the purlin 200, or on different sides, and may be provided in the same position or separately in a staggered manner. The function of the grooves 220 is to allow the molten connection sleeve 210 to be filled into the grooves 220 during the hot-melt welding of the purlin 200 and the connection sleeve 210, so that the connection sleeve 210 is more tightly combined with the purlin 200 after cooling, forming a mortise and tenon joint effect, thereby avoiding the situation where the welding effect is reduced due to insufficient heating.

[0083] In a specific example of this application, see Figure 6 Two grooves 220 with a depth of 1 mm are staggered on both sides of one end of the purlin 200 , and the connecting sleeve 210 is mortise-jointed with the purlin 200 through the grooves 220 .

[0084] Furthermore, the shape of the connecting sleeve 210 is the same as the shape of the cavity 111 of the frame bar 110 ; the connecting sleeve 210 is arranged to fit the cavity wall to distribute the force of the purlin 200 to the frame 100 .

[0085] The present application does not limit the shapes of the cavity 111 and the connecting sleeve 210. Preferably, the cavity 111 can be narrowed in the direction facing the purlin 200. This has the advantage of clamping the connecting sleeve 210, so that the purlin 200 is fixed more firmly and not easy to derail.

[0086] The shape of the connecting sleeve 210 should be the same as that of the cavity 111 and be able to fit exactly. Its function is that, on the one hand, when installing the purlin 200, the connecting sleeves 210 at both ends of the purlin 200 can be slid from one end of the opening of the frame bar 110 and embedded into the cavity 111, and adjusted to the desired position; on the other hand, after the overall assembly is completed, if the purlin 200 is subjected to force from the front, its two ends will be forced to gather towards the middle, and the connection sleeve 210 will fit the cavity wall of the frame 100, which will evenly distribute the force forced on the purlin 200 to the frame 100, thereby achieving a stronger impact resistance effect.

[0087] In a specific example of this application, see Figure 5The cavity 111 is narrowed toward the purlin 200, and the connecting sleeve 210 is in close contact with multiple surfaces of the cavity 111, which is convenient for force transmission and dispersion. The cavity 111 still has some space to facilitate re-adjustment of the width of the overall window guardrail.

[0088] Furthermore, the frame 100 also includes a corner seal 130 .

[0089] After the frame strip 110 and the connector 120 are connected, there is still a hole through which the internal structure can be seen. The corner seal 130 can be inserted into the hole to make the surface of the entire frame 100 flat and prevent wind and sand from entering and damaging the internal structure of the window guardrail. The present application does not limit the specific structure of the corner seal 130, as long as it can fill the hole generated after the frame 100 is assembled.

[0090] In a specific example of this application, see Figure 2 The structure of the corner seal 130 can match the hole leaked by the transverse frame strip, so that it can be inserted into the hole laterally.

[0091] In a specific example of the present application, the window guard rail can be disassembled into Fig. 9 In the state shown, the outer shell 112, the inner plate 113, the corner assembly 121, the screws 122, the fixing code 123, the corner seal 130, and the purlin 200 can be flexibly disassembled, so as to facilitate transportation and save transportation space. Moreover, damaged parts can be replaced more conveniently, thereby extending the service life of the overall guardrail.

[0092] It should be noted that the technical solutions in the various embodiments of the present application can be combined with each other, but the basis for the mutual combination is that it can be implemented by ordinary technicians in the field; when the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist, that is, it does not belong to the scope of protection of this application.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A window guardrail, characterized in that: It comprises a frame and purlins, wherein the frame comprises frame bars and connecting pieces, wherein the connecting pieces connect the frame bars to form the frame; the purlins comprise connecting sleeves, wherein the connecting sleeves are used to connect the frame and the purlins; The frame strip comprises an outer shell and an inner plate, wherein the outer shell and the inner plate are plugged together to form a frame strip having a cavity, and the cavity is used to accommodate the connecting sleeve; The connecting piece includes an angle piece, a screw and a fixing code, and the fixing code is fixed to the angle piece by the screw to form a fixing code-angle piece-fixing code structure; the connecting piece is arranged in the cavity of the two frame strips to connect the two frame strips; the outer shell is provided with a limiting hole at the screw, and the nut of the screw is clamped in the limiting hole to realize the fixation of the overall structure.

2. The window guardrail according to claim 1, characterized in that: Grooves are provided at both ends of the purlin for tightly combining the purlin with the connecting sleeve.

3. The window guardrail according to claim 1, characterized in that: There is an adjustable space at the installation position of the fixing code on the corner assembly piece.

4. The window guardrail according to claim 1, characterized in that: A side of the fixing code in contact with the corner assembly piece is provided with an anti-slip surface.

5. The window guardrail according to claim 1, characterized in that: The shape of the connecting sleeve is the same as the shape of the cavity of the frame bar; the connecting sleeve is arranged to fit the cavity wall and is used to disperse the force of the purlin to the frame.

6. The window guardrail according to claim 1, characterized in that: The inner plate is provided with a limiting opening for fixing the purlin.

7. The window guardrail according to claim 6, characterized in that: At least one end of the inner plate is provided with an opening, and the inner plates are spliced ​​so that the openings are butted against each other to form the limiting opening.

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