A screen door

Abstract

The utility model discloses a screen door, including door frame and a plurality of screen door unit, each screen door unit is telescopic, each screen door unit is installed in door frame, the upside and downside of door frame all is provided with embedding groove, embedding groove can supply each screen door unit's chain track moves in its inside. In the utility model, because designed embedding groove in door frame, can play the supporting action on the both sides of upper chain track and lower chain track, provides the supporting force for chain track, avoids chain track and separates from door frame to prolong the service life of chain track.

Description

Technical Field

[0001] This utility model relates to the field of screen door technology, specifically a screen door. Background Technology

[0002] The primary function of screen doors is to prevent mosquitoes and maintain indoor ventilation. To better meet usage needs, extendable screen doors are now available. For example, patent document CN217461990U discloses a tape measure and chain track retraction structure for screen doors, with chain tracks and tape measures at both ends of the screen to precisely position the stretched length of the screen. However, after this screen door unit is installed inside the screen door frame, it needs to be stretched to adjust the length of the chain track. Since the chain track serves as both an adjustment structure and a structural support, its strength weakens and deforms over long-term use, making it prone to detaching from the door frame and hindering the screen door's retraction and extension functions.

[0003] Therefore, this patent application is filed. Utility Model Content

[0004] In view of the above, and to solve the problems existing in the prior art, this utility model provides a screen door.

[0005] The technical solution is a screen door, including a door frame and multiple screen door units, each of the screen door units being telescopic and installed inside the door frame. The upper and lower sides of the door frame are provided with embedding grooves, which allow the track of each screen door unit to move inside.

[0006] As a preferred design, the embedded groove is further provided with two guide grooves, which are symmetrically arranged along the embedded groove. Each guide groove cooperates with the guide protrusions located at both ends of each screen door unit. The guide groove is connected to the embedded groove, and the depth of the guide groove is greater than the depth of the embedded groove.

[0007] As a preferred design, each of the screen door units includes a handle, an upper chain rail, a lower chain rail, a chain rail drive structure, a curled mesh, and a screen box. The handle and the inner wall of the screen box are both hollow structures. The chain rail drive structure is located inside the handle. The chain rail drive structure includes a first spool, a second spool, a first cord, and a second cord. The first cord is wound around the first spool, and its two ends are respectively connected to the first ends of the upper and lower chain rails. The second cord is wound around the second spool, and its two ends are respectively connected to the first ends of the upper and lower chain rails. Both the first and second spools are connected to the handle via a rotating shaft. The first and second spools are arranged alternately between the upper and lower chain rails. The second ends of the upper and lower chain rails are respectively connected to the screen box. The first ends of the upper and lower chain rails are both inserted into the handle. One end of the curled mesh is connected to the handle, and the other end is connected to the winding structure inside the screen box.

[0008] Both the gauze box and the handle are provided with guide protrusions.

[0009] As a preferred design, both the upper and lower track consist of two chains and multiple connecting blocks, which connect the two chains together in a linearly spaced manner.

[0010] As a preferred design, the hollow cavity of the handle is provided with two guide rails, located at the upper and lower ends of the handle respectively, for guiding the movement of the upper and lower chain rails, and the two guide rails are arranged in an alternating manner.

[0011] As a preferred design, both the first and second reels have grooves in the middle to form grooved reels, and the surface of the grooves is provided with anti-slip textures.

[0012] As a preferred design, the screen door unit further includes a lubrication mechanism, which includes a delivery pipe and a lubrication head. The handle is provided with an opening, through which the delivery pipe enters the handle. The lubrication head is connected to the delivery pipe, and the end of the lubrication head extends to the first and second thread reels. The opening is provided with an openable and closable sealing cover.

[0013] The handle is also provided with a fixed shaft, and the end of the curled yarn near the handle is fixedly wound on the fixed shaft.

[0014] As a preferred design, the winding structure includes a drum and a torsion spring. The end of the curled yarn away from the handle is sleeved on the drum. The drum is connected to the inner wall of the yarn box through the torsion spring. Both ends of the drum are rotatably connected to the inner wall of the yarn box.

[0015] As a preferred design, a magnetic fixing structure is provided between the door frame and the screen door unit, and a magnetic fixing structure is also provided between each adjacent screen door;

[0016] Each of the aforementioned screen door units has a blocking brush fixedly provided on the side of the screen box and handle.

[0017] As a preferred design, an inner groove is provided on the screen box, and a plug is provided on the handle. The plug cooperates with the inner groove, and the inner groove and the plug form a detachable connection structure between adjacent screen door units.

[0018] This utility model provides a track drive structure, which has the following advantages compared with the prior art:

[0019] 1. In this utility model, because an embedded groove is designed inside the door frame, it can provide support on both sides of the upper and lower chain rails, provide support for the chain rails, prevent the chain rails from detaching from the door frame, and thus extend the service life of the chain rails.

[0020] 2. In this utility model, guide grooves are designed on both sides of the embedded groove, which can cooperate with the guide protrusions to improve the stability of the screen door unit during installation and adjustment of the screen door width.

[0021] 3. In this utility model, the upper end of the curled mesh is designed with a chain track structure, which is the same as the lower chain track structure. The chain track structure is sturdy and can maintain better compatibility with the door frame during long-term use, resulting in a longer service life and better protection.

[0022] 4. In this utility model, due to the design of the magnetic suction structure and the modular design between adjacent screen door units, the connection stability between the connected screen door units is improved, and the assembly of the screen door system is more flexible. The number and arrangement of screen door units can be freely combined according to actual usage needs. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the door frame structure in this utility model.

[0024] Figure 2 This is a schematic diagram of the structure of the screen door unit provided in an embodiment of the present utility model.

[0025] Figure 3 This is a schematic diagram of the internal structure of the handle of this utility model.

[0026] Figure 4 This is a side view of the centerline wheel of this utility model.

[0027] Figure 5 This is a schematic diagram of the lubrication mechanism.

[0028] In the diagram: 1-Upper chain track, 2-Lower chain track, 3-First thread pulley, 4-Second thread pulley, 5-First thread rope, 6-Second thread rope, 7-Girder groove, 8-Anti-slip texture, 9-Conveyor pipe, 10-Lubrication head, 11-Sealing cover, 12-Handle, 13-Curled yarn mesh, 14-Yarn box, 15-Spindle, 16-Chain, 17-Connecting block, 18-Guide rail, 19-Fixed shaft, 20-Door frame, 21-Embedded groove, 22-Guide groove, 23-Guide protrusion, 24-Magnetic plate, 25-Blocking brush, 26-Inner groove, 27-Insertion rod. Detailed Implementation

[0029] The technical solutions of various embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] Example 1:

[0032] A screen door includes a door frame 20 and multiple screen door units, each of which is retractable and is installed inside the door frame 20.

[0033] Specifically, the screen door unit includes a handle 12, an upper chain track 1, a lower chain track 2, a chain track drive structure, a curled screen 13, and a screen box 14. The inner walls of both the handle 12 and the screen box 14 are hollow, and both ends of the handle 12 are open. The chain track drive structure is located inside the handle 12 and includes a first thread pulley 3, a second thread pulley 4, a first thread rope 5, and a second thread rope 6. The first thread rope 5 is wound around the first thread pulley 3, and its two ends are respectively connected to the first ends of the upper chain track 1 and the lower chain track 2. The second thread rope 6 is wound around the second thread pulley 4, and its two ends are connected to the first ends of the upper chain track 1 and the lower chain track 2. The first ends of the upper chain track 1 and the lower chain track 2 are respectively connected to the first ends of the upper chain track 1 and the lower chain track 2. The first spool 3 and the second spool 4 are both connected to the handle 12 through the rotating shaft 15. The first spool 3 and the second spool 4 are arranged alternately between the upper chain track 1 and the lower chain track 2. The second ends of the upper chain track 1 and the lower chain track 2 are respectively fixedly connected to the upper end and the lower end of the yarn box 14. The first ends of the upper chain track 1 and the lower chain track 2 are connected to the corresponding spools by passing through the openings on the handle 12 and entering the handle 12. One end of the curled yarn 13 is connected to the handle 12, and the other end is connected to the winding structure inside the yarn box 14. During the process of pushing and pulling the handle 12, the curled yarn 13 can be opened or rolled up. Guide protrusions 23 are provided on both the yarn box 14 and the handle 12, such as one guide protrusion 23 at each of the upper and lower ends of the yarn box 14.

[0034] Correspondingly, recessed grooves 21 are provided on both the upper and lower sides of the door frame 20. The upper track 1, lower track 2, and the screen boxes 14 and handles 12 located at both ends can all be embedded into the grooves 21. The grooves 21 allow the track, screen box 14, and handles 12 of each screen door unit to move within them. The baffles located on both sides of the grooves 21 can protect the track, preventing it from detaching from the door frame 20 during long-term use, providing support for the track, and maintaining the normal opening and closing function of the screen door.

[0035] To improve the stability of the screen door unit installed in the door frame 20, two guide grooves 22 are provided in the embedding groove 21. The two guide grooves 22 are symmetrically arranged along the embedding groove 21, and each guide groove 22 cooperates with the guide protrusion 23 on the screen door unit. The guide groove 22 is connected to the embedding groove 21, and the depth of the guide groove 22 is greater than the depth of the embedding groove 21. After installation, the guide protrusion 23 is inserted into the deeper guide groove 22, which plays a guiding role during movement, making the movement more stable.

[0036] In use, the screen door unit is installed in the door frame 20 of the screen door, with both the upper chain rail 1 and the lower chain rail 2 located within the door frame 20. Pulling the handle 12 will pull the upper chain rail 1, causing the second rope 6 to move, which in turn causes the lower chain rail 2 and the first rope 5 to move in the opposite direction. For example, if the first end of the upper chain rail 1 moves downward, the first end of the lower chain rail 2 moves upward, so that the upper and lower chain rails 2 move synchronously in a one-to-one coupling manner. The second ends of the upper chain rail 1 and the lower chain rail 2 move synchronously in one direction, thereby causing the curled mesh 13 to be rolled up or unrolled, so as to adjust the length of the curled mesh 13 located outside the screen box 14, thereby realizing the length adjustment of the screen door unit.

[0037] In this embodiment, the upper end of the curled mesh 13 is designed as a chain track structure, which is the same as the structure of the lower chain track 2. The chain track structure is sturdy and can maintain better compatibility with the door frame 20 during long-term use, resulting in a longer service life and better protective effect. At the same time, the embedded groove 21 can provide support on both sides of the upper chain track 1 and the lower chain track 2, providing support force for the chain track and extending its service life.

[0038] Furthermore, both the upper track 1 and the lower track 2 consist of two chains 16 and multiple connecting blocks 17. The two chains 16 are connected together by the multiple connecting blocks 17, which are linearly distributed and spaced apart from adjacent connecting blocks 17. One end of each chain 16 is fixedly connected to one end of the yarn box 14 by a screw, while the other end of each chain 16 is inserted into the handle 12 and connected to the corresponding cord.

[0039] Furthermore, the hollow cavity of the handle 12 is provided with two guide rails 18, located at the upper and lower ends of the handle 12 respectively, to guide the movement of the upper chain rail 1 and the lower chain rail 2. The two guide rails 18 are staggered and matched with the positions of the upper chain rail 1 and the lower chain rail 2 to guide the stability of the upper chain rail 1 and the lower chain rail 2 when they move within the handle 12, especially the stability when they first enter the handle 12. Preferably, each guide rail 18 is composed of two plates fixed inside the handle 12, both plates being perpendicular to the inner wall of the handle 12 and facing each other.

[0040] To further reduce slippage between the rope and the reel and ensure better contact between them, this embodiment designs both the first reel 3 and the second reel 4 with grooves 7 in the middle to form grooved reels. The first rope 5 is in contact with the groove 7 on the first reel 3, and the second rope 6 is in contact with the groove 7 on the second reel 4. Even better, an anti-slip structure is provided on the surface of the grooves 7 of the first reel 3 and the second reel 4, such as an uneven anti-slip texture 8. This anti-slip texture 8 allows the rope to fit tightly against the surface of the reel during transmission, reducing slippage and increasing the friction between the rope and the reel, thus improving transmission efficiency.

[0041] In this embodiment, the screen door unit also includes a lubrication mechanism, which includes a delivery pipe 9 and a lubrication head 10. An opening is provided on the handle 12, through which the delivery pipe 9 enters the handle 12. The lubrication head 10 is connected to the delivery pipe 9, and its end extends to the first spool 3 and the second spool 4. An openable and closable sealing cap 11 is provided at the opening. The diameter of the hole at the end of the lubrication head 10 closest to the first spool 3 and the second spool 4 is smaller than the diameter at the other end. Lubricating oil is periodically injected into the first spool 3 and the second spool 4 through the delivery pipe 9, reducing wear between the spools and the yarn.

[0042] Example 2:

[0043] Based on the embodiment, a fixed shaft 19 is further provided inside the handle 12. The fixed shaft 19 is located on one side of the guide rail 18. A narrow slit is provided on the side of the handle 12. One end of the curled mesh 13 near the handle 12 is fixedly wound on the fixed shaft 19. The curled mesh 13 is fixed to the fixed shaft 19 through the narrow slit.

[0044] The winding structure includes a drum and a torsion spring. The end of the curled yarn 13 furthest from the handle 12 is fitted onto the drum. The drum is connected to the inner wall of the yarn box 14 via the torsion spring, and both ends of the drum are rotatably connected to the inner wall of the yarn box 14. The winding of the curled yarn 13 is achieved through the interaction between the torsion spring and the inner wall of the drum. The specific interaction method can use existing yarn winding structures, which will not be elaborated here.

[0045] Even better, a magnetic fixing structure is provided between the door frame 20 and the screen door unit, and a magnetic fixing structure is also provided between each adjacent screen door; for example, magnetic plates 24 can be fixedly installed on both sides of the door frame 20 and each screen door unit, which can improve the connection stability between adjacent screen door units. Furthermore, an inner groove 26 is provided on the screen box 14, and a plug 27 is provided on the handle 12. The plug 27 cooperates with the inner groove 26, forming a detachable connection structure between adjacent screen door units. Thus, through the synergistic cooperation of the magnetic plates 24 and the plug 27 with the inner groove 26, the connection stability between screen door units is significantly improved. And because it is a detachable connection, only the corresponding screen door unit needs to be disassembled during installation or maintenance, which also improves efficiency. This design forms a modular splicing design, which makes the assembly of the screen door system more flexible, allowing for free combination of the number and arrangement of screen door units according to actual usage needs.

[0046] To improve the efficiency of preventing mosquitoes and dust, blocking brushes 25 are also fixed to the sides of the screen box 14 and handle 12 of the screen door unit. The blocking brushes 25 between adjacent screen door units can prevent mosquitoes or dust from entering due to gaps.

[0047] The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the present invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the present invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A screen door, characterized in that, It includes a door frame (20) and multiple screen door units, each of which is telescopic and is installed inside the door frame (20). The upper and lower sides of the door frame (20) are provided with embedding grooves (21), which allow the track of each screen door unit to move inside.

2. A screen door according to claim 1, characterized in that, The embedded groove (21) is also provided with two guide grooves (22). The two guide grooves (22) are symmetrically arranged along the embedded groove (21). Each guide groove (22) cooperates with the guide protrusions (23) located at both ends of each screen door unit. The guide groove (22) is connected to the embedded groove (21), and the groove depth of the guide groove (22) is greater than the groove depth of the embedded groove (21).

3. A screen door according to claim 2, characterized in that, Each screen door unit includes a handle (12), an upper chain rail (1), a lower chain rail (2), a chain rail drive structure, a curled screen (13), and a screen box (14). The inner walls of the handle (12) and the screen box (14) are hollow. The chain rail drive structure is located inside the handle (12). The chain rail drive structure includes a first thread pulley (3), a second thread pulley (4), a first thread (5), and a second thread (6). The first thread (5) is wound around the first thread pulley (3), and the two ends of the first thread (5) are respectively connected to the first ends of the upper chain rail (1) and the lower chain rail (2). The second thread (6) is wound around the second thread pulley (4), and the second thread (6) is wound around the second thread pulley (4). The two ends of the cord (6) are respectively connected to the first ends of the upper chain rail (1) and the lower chain rail (2). The first spool (3) and the second spool (4) are both connected to the handle (12) through the shaft (15). The first spool (3) and the second spool (4) are arranged alternately between the upper chain rail (1) and the lower chain rail (2). The second ends of the upper chain rail (1) and the lower chain rail (2) are respectively connected to the yarn box (14). The first ends of the upper chain rail (1) and the lower chain rail (2) are both inserted into the handle (12). One end of the curled yarn net (13) is connected to the handle (12), and the other end is connected to the winding structure inside the yarn box (14). Both the yarn box (14) and the handle (12) are provided with guide protrusions (23).

4. A screen door according to claim 3, characterized in that, The upper track (1) and the lower track (2) are both composed of two chains (16) and multiple connecting blocks (17). The two chains (16) are connected by multiple connecting blocks (17), and the multiple connecting blocks (17) are distributed in a linear interval.

5. A screen door according to claim 3, characterized in that, The hollow cavity of the handle (12) is provided with two guide rails (18), which are located at the upper and lower ends of the handle (12) respectively, and are used to guide the movement of the upper chain rail (1) and the lower chain rail (2) respectively, and the two guide rails (18) are arranged in an alternating manner.

6. A screen door according to claim 3, characterized in that, The first spool (3) and the second spool (4) are both provided with a groove (7) in the middle to form a grooved spool, and the surface of the groove (7) is provided with an anti-slip texture (8).

7. A screen door according to any one of claims 3 to 6, characterized in that, The screen door unit also includes a lubrication mechanism, which includes a delivery pipe (9) and a lubrication head (10). The handle (12) is provided with an opening, through which the delivery pipe (9) enters the handle (12). The lubrication head (10) is connected to the delivery pipe (9), and the end of the lubrication head (10) extends to the first thread wheel (3) and the second thread wheel (4). The opening is provided with an openable and closable sealing cover (11). The handle (12) is also provided with a fixed shaft (19), and the curled yarn (13) is fixedly wound around the fixed shaft (19) at one end near the handle (12).

8. A screen door according to claim 7, characterized in that, The winding structure includes a drum and a torsion spring. The end of the curled yarn (13) away from the handle (12) is sleeved on the drum. The drum is connected to the inner wall of the yarn box (14) through the torsion spring. Both ends of the drum are rotatably connected to the inner wall of the yarn box (14).

9. A screen door according to claim 8, characterized in that, A magnetic fixing structure is provided between the door frame (20) and the screen door unit, and a magnetic fixing structure is also provided between each adjacent screen door; Each of the screen door units has a blocking brush (25) fixedly provided on the side of the screen box (14) and the handle (12).

10. A screen door according to claim 9, characterized in that, An inner groove (26) is provided on the gauze box (14), and a plug (27) is provided on the handle (12). The plug (27) cooperates with the inner groove (26), and the inner groove (26) and the plug (27) form a detachable connection structure between adjacent gauze door units.

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