Folding door rail connecting structure and folding door

Abstract

The invention discloses a folding door rail connecting structure and a folding door, and relates to the technical field of folding doors, the folding door comprises the rail connecting structure, the rail connecting structure comprises a connecting base used for being connected to the upper end of a connecting strip, and a matching structure is arranged on the connecting base; the track connecting structure comprises a matching structure and a track connecting structure, the matching structure is used for being matched with a groove in an upper track, the matching structure comprises a sleeve which is installed on the connecting base and can rotate relative to the connecting base, and the track connecting structure serves as a component of the folding door and is particularly used for connecting a door leaf and the upper track. The failure rate of the folding door can be effectively reduced, and the service life of the folding door is prolonged.

Description

Technical Field

[0001] This invention relates to the field of folding door technology, and in particular to a folding door track connection structure and a folding door. Background Technology

[0002] Diamond mesh folding screen doors are an important type of folding door. They combine high-strength protective mesh (diamond mesh) with a folding opening mechanism, offering advantages in protection, durability, space utilization, and convenience. Other folding door types include those using high-polymer translucent materials (such as PVC and PET), fabric mesh (such as polyester fiber mesh and fiberglass mesh), and composite materials (such as wood panels, glass panels, metal mesh panels, and any combination of high-polymer materials). The main difference between these types of folding doors and diamond mesh folding screen doors lies in the form of the door panels. For example, diamond mesh folding screen doors typically use stainless steel mesh structures to provide mosquito protection, security, and ventilation. Other types of folding doors utilize different door panel forms: transparent polymer mesh is used for light transmission and airflow isolation, non-transparent mesh is used for airflow isolation and privacy, and fabric mesh is used for breathability, a soft touch, and a more aesthetically pleasing appearance.

[0003] The following uses a diamond mesh folding screen door as an example to explain the structure and characteristics of folding doors: The main structure of a diamond mesh folding screen door includes multiple door panels (often called screen panels because of their mesh structure). Each door panel includes a frame and a metal mesh inside the frame. The metal mesh is usually made of high-strength, corrosion-resistant stainless steel, such as 304 or 316 stainless steel wire with a diameter of 0.5mm to 0.8mm (e.g., mesh size of 0.6mm×0.6mm or 0.8mm×0.8mm). The door panels are connected by connecting strips, which are flexible or hinged, allowing the multiple door panels to form an accordion-like shape that can be folded to one or both sides and unfolded. The main structure of the diamond mesh screen door also includes a track structure. The relationship between the track structure and the door panels is as follows: the door panels are mounted on the track structure via upper and lower rolling elements, and the door panels deform as the rolling elements slide along the track structure.

[0004] For details regarding the specific structure of the diamond mesh folding screen door, please refer to Chinese patents with application numbers CN202320137591.1 and CN202420047056.1. In Chinese patent CN202420047056.1, the left end of the door leaf formed by the door panel is installed on the left frame, and a sliding plate is fixed to the right end of the door leaf. The upper and lower ends of the sliding plate are connected to the track via rollers. When the sliding plate slides along the track to the left via the rollers, it folds up; when the sliding plate slides along the track to the right via the rollers, the door leaf unfolds.

[0005] Depending on the application scenario of folding doors, when they are used in garage doors, balconies, gazebos, etc., folding doors are required to have a larger structural size than traditional applications. This requires the track structure to provide stable constraints on the door leaf in order to reduce the failure rate of folding doors and ensure their overall lifespan. To meet these requirements, it is necessary to optimize the design of the structure and related components of folding doors. Summary of the Invention

[0006] To address the aforementioned issue of optimizing the structure and related components of folding doors, this invention provides a folding door track connection structure and a folding door. The track connection structure, as a component of the folding door, is specifically used to connect the door leaf to the upper track. The structural design adopted in this solution can effectively reduce the failure rate of folding doors and extend their service life.

[0007] To address the above problems, the folding door track connection structure and folding door provided by the present invention solve the problems through the following technical points: The folding door track connection structure includes a connecting seat for connecting to the upper end of the connecting strip, the connecting seat is provided with a mating structure, the mating structure is used to mate with the groove on the upper track, and the mating structure includes a sleeve installed on the connecting seat and rotatable relative to the connecting seat.

[0008] As described in the prior art above, folding doors come in various types depending on the form of the door panels. The core concept of this solution does not involve any improvement to the door panels of existing folding doors. Therefore, the folding door of this solution should be considered to include folding doors with any form of door panel implementation. For example, folding doors with a door panel body made of a high-molecular light-transmitting material, a door panel body made of a fabric material, a door panel body made of a metal plate material or a metal mesh material, or a door panel body composed of multiple materials (the door panel body is formed by a composite of multiple materials) are all folding doors claimed in the subject matter of this application.

[0009] Meanwhile, the improvements in this solution address the connection structure between the upper door leaf and the track of the folding door. The related issues and effects are present in folding doors of any door type. To facilitate the explanation of this solution, the following explanation will use a diamond mesh folding screen door as an example.

[0010] In existing technology, folding doors are typically designed as follows: an outer frame and door panels installed inside the outer frame. The outer frame provides a track structure, which usually includes an upper track and a lower track. Other designs include door panels whose outer frame is formed solely by the upper and lower tracks. The door panels may have sliding strips on one or both sides. The sliding strips are strip-shaped structures connected to the sides of the door panels. Under the action of human force or, for example, an electric drive mechanism, the sliding strips slide along the track structure, adjusting the opening area of ​​the door panels. The door panels are formed by connecting multiple door panels via connecting strips. The adjacent door panels are connected in a way that allows them to rotate. The overall door panel has an accordion-like structure. When the opening area increases, the angle between the door panels increases; when the opening area decreases, the angle between the door panels decreases. The location of the angle change is usually at the connection between the door panel and the connecting strip. The angle change is usually achieved through the rotation of the hinge structure or the deformation of the flexible connection structure. When the overall area of ​​the screen door is relatively small, the common structure is to install connecting structures at the upper and lower ends of the sliding strip, which are connected to the upper and lower tracks respectively. These connecting structures enable the sliding strip to slide against the outer frame. When the door panel area increases, to improve the firmness of the connection between the door panel and the outer frame, improve the flexibility of the door panel deformation, and enhance structural stability, a better solution is to also constrain the connecting strip to the track structure. However, since the change in the door panel opening area is accompanied by a change in the corrugated shape of the door panel, the specific constraint method is that some connecting strips are constrained to the track structure, while the spacing between other connecting strips and the track structure can adapt to the change in the door panel opening area. For example, for the connecting strips connected to the door panel, the connecting strips constrained to the track structure and the connecting strips whose positions relative to the track structure can change are classified. The connecting strips are classified into first connecting strips and second connecting strips. The first connecting strip is slidably connected to the track structure through a connecting structure for the sliding component, and serves to connect the two door panels. The second connecting strip only serves to connect the two door panels and provide a rotating joint. Taking a screen door with a sliding strip on one side as an example, a third connecting strip is set on the other side of the screen door to allow the end of the door panel to be rotatably connected to the side of the outer frame. The arrangement of the sliding strips and connecting strips, from one side of the door leaf to the other, is as follows: sliding strip, second connecting strip, first connecting strip, second connecting strip, first connecting strip...In a screen door with a first, second, and third connecting strip, the positions of the sliding strip, the first connecting strip, and the second connecting strip along the length of the track structure all change when the door panel deforms. The distance between the second connecting strip and the track structure also changes. In this structure, one end of each door panel has a sliding connection to the outer frame. The achieved technical effects include multiple constraint positions between the door panel and the outer frame. This not only improves the firmness of the connection between the door panel and the outer frame, but also effectively improves the controllability and flexibility of door panel deformation because the first, sliding, and third connecting strips constrain the position of each door panel relative to the outer frame. For screen doors requiring large opening areas, sliding connections between some connecting strips and the outer frame using hardware are a very suitable method.

[0011] The traditional connection structure used to achieve the sliding connection between the first connecting strip and the upper rail is the same as the connection structure used to achieve the sliding connection between the push-pull strip and the upper rail. Such a connection structure includes a connecting seat and a mating structure installed on the connecting seat. The mating structure is usually configured to include a wheel set. The wheel set includes a connecting frame and two rollers respectively installed at different ends of the connecting frame. The wheel set is mated in the groove of the upper rail. The groove is a T-shaped groove with an inner width greater than the outer width. Specifically, the wider inner side of the groove is the wheel groove, and the narrower outer side is the connecting groove. The wheel set is accommodated and supported in the wheel groove, and the connecting member between the connecting seat and the connecting strip passes through the connecting groove. During the adjustment of the door opening area, the connection structure on the first connecting strip differs from the connection structure on the sliding strip in terms of force. The first connecting strip not only slides relative to the track structure, but also, because the force transmitted by the door panel depends on the direction of movement of the sliding strip and the angle between the door panels, the magnitude and direction of the force on the first connecting strip are unstable. This results in the connection structure on the first connecting strip not only sliding along the groove, but also bearing torque and driving force along the width of the groove. These characteristics of movement and force on the connection structure connected to the first connecting strip make the traditional track connection structure prone to damage and easily lead to poor door opening adjustment. To address these issues, the above technical solution is proposed.

[0012] In a specific application of the above technical solution, the connecting strip is installed at the upper end of the connecting strip between the door panels during use. The mating structure is a structure on the track connection structure used to mate with the groove on the upper track. Specifically, the screen door may only include the first connecting structure, or it may only include the second connecting structure, or it may include both the first and second connecting structures. The connection is used by providing support to the connecting strip via the lower track on the bottom side of the door frame. The support height is sufficient to support the sleeve so that it is embedded in the groove of the upper track. In this application, during the adjustment of the screen door's opening area, the connecting seat moves synchronously with the swinging and rotating motion or rotational tendency of the connecting strip. When the sleeve contacts and is squeezed against the groove, the track connection structure moves along... During the sliding process of the upper track, under the frictional force provided by the sleeve on the surface of the groove, the sleeve rotates relative to the connecting seat, reducing the resistance during the adjustment of the screen door opening area and reducing the wear rate of the groove surface on the track connection structure. Therefore, this solution can effectively avoid the existing technology where the connecting part between the connecting seat and the connecting strip (which does not have a sleeve connection structure) is fixed relative to the connecting seat. Because of the dry friction between the connecting part and the groove surface, the door opening area adjustment is hindered due to frictional resistance, the track connection structure strength decreases sharply due to the fast wear rate, and the matching accuracy between the track connection structure and the groove decreases sharply due to the fast wear rate. This achieves the purpose of effectively reducing the failure rate of folding doors and extending the service life of folding doors.

[0013] As those skilled in the art, the upper track and the door panels are connected through a track connection structure. The function of the upper track is to constrain the position of one end of each door panel in the width direction of the upper track groove. The above-mentioned mating structure can be any structure that mates with the groove and has related functions. For example, for the above-mentioned first connection structure, only a single roller can be configured on the connecting frame. For example, the midpoint of the roller's axle is located on the center line of the connecting strip. The difference between the above scheme and the prior art is that a sleeve that can rotate relative to the connecting seat is configured on the connecting seat. The sleeve, as a component on the track connection structure for contacting the surface of the groove, achieves the purpose of optimizing the force on the contact surface of the track connection structure for contacting the groove and optimizing the movement resistance of the track connection structure by rotating the sleeve relative to the connecting seat when the track connection structure slides along the upper track, swings in the width direction of the upper track, or when the connecting strip twists or has a twisting tendency.

[0014] In one specific embodiment, the track connection structure includes a first connection structure, the first connection structure including a connecting seat and a mating structure, the mating structure including a sleeve, a connecting frame and a roller; The upper end of the connecting seat is provided with a cylindrical section, and the sleeve is rotatably installed on the cylindrical section through the central hole thereon. The connecting frame is rotatably installed on the cylindrical section through the through hole thereon. The connecting frame is located above the sleeve, and rollers are installed at both ends of the connecting frame.

[0015] The above provides a specific implementation of a track connection structure, specifically a structure with rollers. In a screen door application: the lower end of the connecting seat is fixedly connected to the upper end of the connecting strip. The cylindrical section is a tubular structure at the upper end of the connecting seat. Both the sleeve and the connecting frame are rotatably mounted on the cylindrical section. The sleeve is stacked on the stepped surface of the connecting seat, and the connecting frame is located above the sleeve. In this application, for a T-shaped groove on the upper track, the structure formed by the connecting frame and the rollers is accommodated in the wheel groove inside the groove. The rollers are supported on the wheel groove, and the sleeve is located in the connecting groove outside the groove. When the sleeve comes into contact with the surface of the connecting groove due to the deflection of the connecting strip, the sleeve rotates relative to the cylindrical section to optimize the stress on the track connection structure and protect the position on the track connection structure that is in contact with the connecting groove. Furthermore, this solution uses a connecting frame that can be rotatably installed on the cylindrical section. For the deflection of the connecting frame synchronous with the connecting strip, the structural form of the connecting frame and the cylindrical section allows the cylindrical section to swing relative to the connecting frame. When the connecting frame has a stable posture, the structure formed by the connecting strip and the connecting seat can deflect freely, thereby optimizing the stress on the connecting strip and the connecting seat under the deflection force from the door panel.

[0016] In one specific embodiment, the connecting frame is floatingly fitted onto the cylindrical section, wherein the floating fit means that the connecting frame can slide along the axis of the cylindrical section.

[0017] The above provides a form of cooperation between the connecting frame and the cylindrical section. With this solution, when the roller is constrained in the wheel groove, the connecting frame can slide relative to the cylindrical section, giving the connecting frame a degree of freedom to move along the axis of the connecting strip. This addresses potential deformation of the screen door frame during use, as well as obstacles in the upper and lower tracks that may affect the sliding of the connecting structure at both ends of the connecting strip. By sliding the connecting frame along the axis of the cylindrical section, the adaptability of the door panel to such deformations and obstacles can be effectively improved, allowing the connecting strip to move more smoothly along the upper and lower tracks with less resistance. In practical applications, due to the constraint of the wheel body by the wheel groove and the constraint of the cylindrical section by the through hole on the connecting frame, the connecting frame, through the cylindrical section and the connecting seat, is used to limit the position of the connecting bar in the width direction of the wheel groove. The connecting structure at the lower end of the connecting bar can provide support for the connecting bar. The cooperation between the connecting frame and the cylindrical section can adopt any form that can achieve the floating cooperation. For example, it is not necessary to set any components on the track connecting structure to constrain the sliding of the connecting frame on the axis of the cylindrical section. The following scheme of using a helical spring to constrain the connecting frame is one of the preferred solutions. Specifically, by adjusting the depth of the connecting screw embedded in the cylindrical section, while the connecting seat is fixed at the upper end of the connecting bar by the connecting screw, the helical spring is compressed into an elastic deformation state by the screw head. This allows the helical spring to press the connecting frame down until the roller can make good contact with the bottom side of the wheel groove, thereby improving the smoothness of the connecting bar sliding along the track.

[0018] In one specific embodiment, a connecting screw is also included. The connecting screw passes through the connecting seat through a screw hole on the connecting seat. The central hole of the cylindrical section serves as a partial hole segment of the screw hole. The upper end of the connecting screw has a nail head. A helical spring is disposed between the nail head and the connecting frame. The upper end of the helical spring acts on the nail head, and the lower end of the helical spring acts on the connecting frame.

[0019] As described above, this solution provides a technical solution that uses a connecting screw to connect the connecting seat and the connecting strip (the upper end of the connecting strip is provided with a connecting hole for embedding the lower end of the connecting screw), and uses the screw head and the helical spring to constrain the contact state between the roller and the wheel groove.

[0020] In one specific embodiment, the through hole on the connecting frame is a stepped hole with an upper diameter larger than the lower diameter, and the lower end of the helical spring acts on the stepped surface of the stepped hole; the cylindrical section is located inside the helical spring.

[0021] The above provides a specific assembly method for a helical spring. By using this solution, the position of the cylindrical section in the radial direction of the through hole is constrained by the through hole of the connecting frame, and the position of the helical spring in the radial direction of the through hole is constrained by the upper end of the stepped hole. This can effectively prevent interference with the floating fit caused by the contact between the helical spring and the upper end of the cylindrical section during the sliding process of the connecting frame along the cylindrical section.

[0022] In one specific embodiment, the lower end of the connector is provided with two insert rods, and the two insert rods form a gap for clamping the connecting screw.

[0023] The above solution provides a technical approach to improve the connection strength between the connector and the connecting strip by inserting a rod into the upper end hole of the connecting strip when fixing the connector and the connecting strip. As a preferred method, to avoid pre-drilling threaded holes for connecting screws in the upper end hole of the connecting strip, the sidewall of the hole on the connecting strip constrains the rod to be close to each other after the rod is inserted into the connecting strip. The closeness is such that the gap between the connecting screws is smaller than the outer diameter of the connecting screws. Under this application, during the process of the connecting screws embedding into the gap, the rod is tightened in the connecting strip hole by the connecting screws, and a reliable connection between the connector and the connecting strip is achieved by a strength expansion connection, which simplifies the structure and processing of the connecting strip.

[0024] In one specific embodiment, the two inserts are symmetrical with respect to the center line of the screw hole.

[0025] The above provides a specific arrangement of the relative positions of the insertion rods. By adopting this scheme, the best strength expansion joint quality can be obtained.

[0026] In one specific embodiment, the connector is provided with two mounting holes for adapting the door panel swing shaft.

[0027] The above provides a technical solution that utilizes mounting holes on the connector to accommodate the ends of the swing shafts of the door panels. Specifically, the ends of the swing shafts on both sides of the door panels are respectively inserted into the mounting holes on different sides of the connector. This structural design not only improves the overall aesthetics of the screen door, but also uses the bottom of the upper end of the mounting hole to constrain the position of the door panels along the length of the connector, thus preventing the door panels from coming off the top of the connector and achieving a reliable connection between the door panels and the connector.

[0028] In one specific embodiment, the track connection structure includes a second connection structure, the second connection structure includes a connecting seat and a mating structure, the mating structure including a sleeve; The upper end of the connecting seat is provided with a cylindrical section, and the sleeve can be rotatably installed on the cylindrical section through the central hole thereon.

[0029] The above provides another implementation of the track connection structure. The second connection structure differs from the first connection structure in that it does not have a connecting frame on the cylindrical section. Specifically, the sleeve is inserted into the connecting groove of the upper track groove. Compared with the first connection structure, which has a connecting frame and rollers, the second connection structure does not have the same constraint ability on the connecting strip as the first connection structure because the wheel groove and rollers cannot be used to constrain the connecting seat. During the process of changing the shape of the screen door leaf, the sleeve on the second connection structure has a greater chance and contact force with the side wall of the connecting groove than the sleeve on the first connection structure. Similar to the function of the sleeve on the first connection structure, the sleeve on the second connection structure is also used to reduce the movement resistance of the connecting strip below it, improve the movement flexibility of the connecting strip, and reduce the surface damage caused by the side wall of the connecting groove to the track connection structure by rotating relative to the cylindrical section.

[0030] It is important to note that although the second connecting structure is less effective at constraining the connecting strips than the first connecting structure, this track-connecting structure is still proposed. The purpose is that, for connecting strips on the screen door that require a track-connecting structure to cooperate with the upper track, one or more second connecting structures can be placed between any adjacent first connecting structures along the length of the upper track. When the screen door is folded to expand its opening area, since the second connecting structure does not have rollers, this solution can reduce or avoid interference between rollers on different first connecting structures, reducing the distance between adjacent connecting strips. This allows for a tighter folding of the door panel, achieving the goal of reducing the volume of the folded door panel and expanding the actual opening area of ​​the screen door. Furthermore, it avoids the problem of insufficient constraint on the connecting strips by the upper track due to the absence of a first connecting structure.

[0031] In one specific embodiment, a connecting screw is also included, which passes through a screw hole on the connecting seat, the central hole of the cylindrical section serves as a partial section of the screw hole, the upper end of the connecting screw has a nail head, and the sleeve is locked between the stepped surface on the connecting seat and the nail head.

[0032] In the above scheme, the connecting screw is not only used to complete the fixed connection of the connecting seat to the upper end of the connecting strip, but also to use the screw head to prevent the sleeve from coming out of the upper end of the track connecting structure. In a specific embodiment, the length of the connecting screw is such that, when a reliable connection with the connecting strip is established, there is a gap between the upper end of the sleeve and the lower end of the screw head. This gap is used to prevent the sleeve from being locked on the cylinder section.

[0033] In one specific embodiment, the lower end of the connector is provided with two insert rods, and the two insert rods form a gap for clamping the connecting screw.

[0034] The above solution provides a technical approach to improve the connection strength between the connector and the connecting strip by inserting a rod into the upper end hole of the connecting strip when fixing the connector and the connecting strip. As a preferred method, to avoid pre-drilling threaded holes for connecting screws in the upper end hole of the connecting strip, the sidewall of the hole on the connecting strip constrains the rod to be close to each other after the rod is inserted into the connecting strip. The closeness is such that the gap between the connecting screws is smaller than the outer diameter of the connecting screws. Under this application, during the process of the connecting screws embedding into the gap, the rod is tightened in the connecting strip hole by the connecting screws, and a reliable connection between the connector and the connecting strip is achieved by a strength expansion connection, which simplifies the structure and processing of the connecting strip.

[0035] In one specific embodiment, the two inserts are symmetrical with respect to the center line of the screw hole.

[0036] The above provides a specific arrangement of the relative positions of the insertion rods. By adopting this scheme, the best strength expansion joint quality can be obtained.

[0037] A folding door includes an upper track and door panels. The door panels are formed by splicing multiple door pieces. Any adjacent door pieces are connected by connecting strips, and any adjacent door pieces form a connection relationship that allows them to rotate relative to each other. Among the connecting strips, the connecting strip used to connect with the upper track is slidably connected to the upper track through the track connection structure described above. The connecting seat is fixedly connected to the upper end of the connecting strip.

[0038] The above describes a folding door including the aforementioned track connection structure. For those skilled in the art, when the door panel of the screen door is made of other materials, such as polymer materials, it should be understood as an equivalent solution. Using metal mesh for the door panel is merely a safety-oriented approach. According to the above description of the track connection structure, the folding door using this structure effectively reduces the failure rate of the folding door, extends its service life, and improves the smoothness of adjusting the screen door panel's shape.

[0039] In one specific embodiment, the upper track is provided with a strip-shaped groove, the groove including a wheel groove and a connecting groove, the wheel groove being located on the inner side of the groove, the connecting groove being located on the outer side of the groove, and the connecting groove being connected to the wheel groove at the middle position of the wheel groove. The track connection structure includes a first connection structure, which includes a connecting seat and a mating structure. The mating structure includes a sleeve, a connecting frame, and a roller. The upper end of the connecting seat is provided with a cylindrical section, and the sleeve is rotatably mounted on the cylindrical section through the central hole thereon. The connecting frame is rotatably mounted on the cylindrical section through the through hole thereon. The connecting frame is located above the sleeve, and rollers are installed at both ends of the connecting frame. The sleeve passes through the communicating groove, and the connecting structure formed by the connecting frame and the roller is installed in the wheel groove.

[0040] Based on the above description of the track connection structure, the above technical solution is a specific application of the first connection structure in a folding door, that is, providing a folding door including the first connection structure. In specific implementation, the wheel groove can be any wheel groove that can accommodate and support the roller. As a way to improve the constraint ability of the upper track on the screen door leaf, the wheel groove adopts a contour design similar to the shape of the roller. The center of the roller surface is convex, and the center of the wheel groove constrains the position of the roller. In this implementation method, the position of the roller in the width direction of the wheel groove is constrained by the wheel groove, thereby achieving the purpose of constraining the position of the connecting strip wheel groove in the width direction.

[0041] In one specific embodiment, the connecting frame is floatingly fitted onto the cylindrical section, wherein the floating fit means that the connecting frame can slide along the axis of the cylindrical section.

[0042] The above describes the application of a first connecting structure with a floating connecting frame on a folding door. As explained above, this implementation method can optimize the adaptability of the screen door leaf to track deformation and improve the obstacle-crossing performance of the connecting strip moving along the track when the screen door leaf is deformed.

[0043] In one specific embodiment, a connecting screw is also included. The connecting screw passes through the connecting seat through a screw hole on the connecting seat. The central hole of the cylindrical section serves as a partial hole segment of the screw hole. The upper end of the connecting screw has a nail head. A helical spring is disposed between the nail head and the connecting frame. The upper end of the helical spring acts on the nail head, and the lower end of the helical spring acts on the connecting frame. The connecting seat is fixedly connected to the upper end of the connecting strip by connecting screws.

[0044] The above describes the application of the first connecting structure in a folding door, where the connecting frame can float on the cylindrical section and the downward pressure of the connecting frame by the helical spring ensures the contact quality between the roller and the wheel groove. According to the above description, this solution is a technical solution that can improve the smoothness of the connecting strip sliding along the track.

[0045] In one specific embodiment, the upper track is provided with a strip-shaped groove, the groove including a wheel groove and a connecting groove, the wheel groove being located on the inner side of the groove, the connecting groove being located on the outer side of the groove, and the connecting groove being connected to the wheel groove at the middle position of the wheel groove. The track connection structure includes a second connection structure, the second connection structure includes a connecting seat and a mating structure, the mating structure includes a sleeve; The upper end of the connecting seat is provided with a cylindrical section, and the sleeve can be rotatably installed on the cylindrical section through the central hole thereon; The sleeve portion or the entire sleeve is located in the communicating groove.

[0046] As described above, this solution is a specific application of the second connecting structure on a folding door. The track connecting structure of the second connecting structure can be used to reduce the volume of the screen door after folding and increase the opening area of ​​the screen door. It is easy to understand that the groove adapted to the second connecting structure adopts a design that includes wheel grooves and connecting grooves, so as to achieve that the groove is still suitable for the installation of the first connecting structure, thereby enabling the first connecting structure and the second connecting structure to be used together on the upper track.

[0047] In one specific embodiment, a connecting screw is also included, which passes through a screw hole on the connecting seat, the central hole of the cylindrical section serves as a partial section of the screw hole, the upper end of the connecting screw has a nail head, and the sleeve is locked between the stepped surface on the connecting seat and the nail head. The connecting seat is fixedly connected to the upper end of the connecting strip by connecting screws.

[0048] Based on the above description, this solution is a specific application of the second connection structure, including connecting screws, in a folding door.

[0049] In one specific embodiment, the upper track is provided with a strip-shaped groove, the groove including a wheel groove and a connecting groove, the wheel groove being located on the inner side of the groove, the connecting groove being located on the outer side of the groove, and the connecting groove being connected to the wheel groove at the middle position of the wheel groove. The track connection structure includes a first connection structure, which includes a connecting seat and a mating structure. The mating structure includes a sleeve, a connecting frame, and a roller. The upper end of the connecting seat is provided with a cylindrical section, and the sleeve is rotatably mounted on the cylindrical section through the central hole thereon. The connecting frame is rotatably mounted on the cylindrical section through the through hole thereon. The connecting frame is located above the sleeve, and rollers are installed at both ends of the connecting frame. The sleeve passes through the communicating groove, and the connecting structure formed by the connecting frame and the roller is installed in the wheel groove; The track connection structure includes a second connection structure, the second connection structure includes a connecting seat and a mating structure, the mating structure includes a sleeve; The upper end of the connecting seat is provided with a cylindrical section, and the sleeve can be rotatably installed on the cylindrical section through the central hole thereon; The sleeve portion or the entire sleeve is located in the communicating groove; In the direction of extension of the upper track, a second connecting structure is provided between each adjacent first connecting structure.

[0050] As described above, this solution involves the combined application of the first and second connecting structures on a folding door. This approach not only ensures the upper track's ability to constrain the screen door leaf but also makes the folded screen door leaf smaller, thus ensuring a larger opening area for the screen door.

[0051] In one specific embodiment, the lower end of the connector is provided with two insert rods, both of which are inserted into the insertion holes provided at the upper end of the connector, and the two insert rods form a gap for clamping the connecting screw. The connector and the upper end of the connector are fixedly connected by the connecting screw.

[0052] Based on the above description, this solution is a folding door implementation that optimizes the connection strength between the connecting strip and the connecting seat by using two insert rods. Preferably, after the insert rods are inserted into the connecting strip, the sidewalls of the holes on the connecting strip constrain the insert rods to be close to each other, and the gap between the connecting screws is smaller than the outer diameter of the connecting screws. During the process of the connecting screws being embedded in the gap, the insert rods are tightened in the holes of the connecting strip by the connecting screws (the connecting screws provide an outward compressive force to the insert rods), and the connecting seat and the connecting strip are reliably connected by a strength expansion connection.

[0053] The present invention has the following beneficial effects: This solution provides a specific implementation of a folding door track connection structure and a folding door including the track connection structure. When applied to a folding door, this track connection structure can achieve the following: during the adjustment of the screen door's opening area, the connecting seat moves synchronously with the connecting strip's swinging and rotating motion or rotational tendency. When the sleeve contacts and is pressed against the groove, during the sliding process of the track connection structure along the upper track, under the frictional force provided by the groove surface to the sleeve, the sleeve rotates relative to the connecting seat, reducing the resistance during the screen door's opening area adjustment process and reducing the wear rate of the groove surface on the track connection structure. This effectively reduces the failure rate of the folding door, extends its service life, and ensures smooth sliding of the connecting strip track during the screen door's shape adjustment process. Attached Figure Description

[0054] Figure 1 This is a cross-sectional view of the upper track in a specific embodiment of the folding door described in this solution; Figure 2 This is a front view of the first connection structure in a specific embodiment of the folding door track connection structure described in this solution; Figure 3 for Figure 2 A cross-sectional view of the structure shown; Figure 4 This is a front view of the second connection structure in a specific embodiment of the folding door track connection structure described in this solution; Figure 5 for Figure 4 A cross-sectional view of the structure shown; Figure 6 To adopt Figure 2 A structural diagram showing the connection between the provided structure and the upper track; Figure 7 To adopt Figure 4 A structural diagram showing the connection between the provided structure and the upper track; Figure 8 for Figure 2 A three-dimensional structural diagram of the connecting seat in the structure shown; Figure 9 for Figure 2 A bottom view of the connecting seat in the structure shown; Figure 10 This is a schematic diagram showing the arrangement of the first connecting structure and the second connecting structure in the direction of the upper track extension, as described in a specific embodiment of the folding door of this solution. Figure 11 This is a schematic diagram illustrating the connection relationship between the first connecting structure, the second connecting structure and the door panel in a specific embodiment of the folding door described in this solution.

[0055] The reference numerals in the attached drawings are as follows: 100, first connecting structure; 200, second connecting structure; 300, upper track; 400, connecting strip; 500, door panel; 1, connecting screw; 2, helical spring; 3, cylindrical section; 4, connecting frame; 5, roller; 6, sleeve; 7, connecting seat; 8, mounting hole; 9, insertion rod; 10, wheel groove; 11, connecting groove; 12, screw hole. Detailed Implementation

[0056] The present invention will be further described in detail below with reference to the embodiments, but the present invention is not limited to the following embodiments: Example 1: like Figures 1 to 11 As shown, the folding door track connection structure includes a connecting seat 7 for connecting to the upper end of the connecting strip 400. The connecting seat 7 is provided with a mating structure for mating with a groove on the upper track 300. The mating structure includes a sleeve 6 installed on the connecting seat 7 and rotatable relative to the connecting seat 7.

[0057] In the prior art, folding doors are typically designed as follows: including an outer frame and door panels installed inside the outer frame. The outer frame provides a track structure, which typically includes an upper track 300 and a lower track. Other designs include door panels whose outer frame is formed solely by the upper track 300 and the lower track. A sliding strip may be provided on one or both sides of the door panel. The sliding strip refers to a strip-shaped structure connected to the side of the door panel. Under the action of human force or, for example, an electric drive mechanism, the sliding strip slides along the track structure, thereby adjusting the opening area of ​​the door panel. The door panel is formed by connecting multiple door panels 500 via connecting strips 400. Any adjacent door panels 500 are connected in a way that allows them to rotate relative to each other. The screen door has an accordion-like structure. When the opening area increases, the angle between door panels 500 increases; when the opening area decreases, the angle decreases. The angle change typically occurs at the connection between the door panel 500 and the connecting strip 400. This angle change is usually achieved through hinge rotation or flexible connection deformation. When the overall area of ​​the screen door is relatively small, a common structure is to install connecting structures at the upper and lower ends of the sliding strip, respectively connecting to the upper track 300 and the lower track. These connecting structures enable the sliding strip to slide against the outer frame. When the door panel area increases, to improve the strength of the connection between the door panel and the outer frame, and to enhance the door panel's... For better flexibility and structural stability, a more optimal solution would be to also constrain the connecting strip 400 to the track structure. However, since changes in the door opening area are accompanied by changes in the door's corrugated shape, the specific constraint method is that some connecting strips 400 are constrained to the track structure, while the spacing between other connecting strips 400 and the track structure can adapt to changes in the door opening area. For example, for the connecting strips 400 connected to the door panel 500, the connecting strips 400 constrained to the track structure and those whose positions relative to the track structure can change are classified. The connecting strips 400 are classified into first connecting strips and second connecting strips. The first connecting strip (in this embodiment and other embodiments, since the first connecting strip...) The connecting strip 400 is adapted to the groove on the upper track 300 through the track connection structure. Therefore, the connecting strip 400 mentioned below specifically refers to the first connecting strip. It is slidably connected to the track structure through the connecting structure of the sliding component and plays the role of connecting the two door panels 500. The second connecting strip only plays the role of connecting the two door panels 500 and providing a rotating joint. Taking the single-sided configuration of the screen door as an example, a third connecting strip is set on the other side of the screen door to realize the rotatable connection between the end of the screen door panel 500 and the side of the outer frame. The arrangement of the sliding strip and the connecting strip 400, from one side of the door leaf to the other side, is as follows: sliding strip, second connecting strip, first connecting strip, second connecting strip, first connecting strip...In a screen door with a structure consisting of a first connecting strip, a second connecting strip, and a third connecting strip, the positions of these three strips along the length of the track structure change when the door leaf deforms. The distance between the second connecting strip and the track structure also changes. In this structure, one end of each door panel 500 has a sliding connection to the outer frame. This achieves several technical effects, including multiple constraint positions between the door leaf and the outer frame. This not only improves the strength of the connection between the door leaf and the outer frame but also effectively improves the controllability and flexibility of door leaf deformation because the first connecting strip, the sliding strip, and the third connecting strip constrain the position of each door panel 500 relative to the outer frame. For screen doors requiring large opening areas, slidingly connecting some connecting strips 400 to the outer frame using hardware is a very suitable method.

[0058] The traditional connection structure used to achieve the sliding connection between the first connecting strip and the upper rail 300 is the same as the connection structure used to achieve the sliding connection between the push-pull strip and the upper rail 300. Such a connection structure includes a connecting seat 7 and a mating structure installed on the connecting seat 7. The mating structure is usually configured to include a wheel set. The wheel set includes a connecting frame 4 and two rollers 5 respectively installed at different ends of the connecting frame 4. The wheel set is mated in the groove of the upper rail 300. The groove is a T-shaped groove with an inner width greater than the outer width. Specifically, the wider inner side of the groove is the wheel groove 10, and the narrower outer side is the connecting groove 11. The wheel set is accommodated and supported in the wheel groove 10. The connecting member between the connecting seat 7 and the connecting strip 400 passes through the connecting groove 11. During the adjustment of the door opening area, the connection structure on the first connecting strip differs from the connection structure on the sliding strip in terms of force. The first connecting strip not only slides relative to the track structure, but also, because the force transmitted by the door 500 depends on the direction of movement of the sliding strip and the angle between the door 500 pieces, the magnitude and direction of the force on the first connecting strip are unstable. This results in the connection structure on the first connecting strip not only sliding along the groove, but also bearing torque and driving force along the width of the groove. These characteristics of movement and force on the connection structure connected to the first connecting strip make the traditional track connection structure prone to damage and prone to causing poor adjustment of the door opening shape. To address these issues, the above technical solution is proposed.

[0059] In a specific application of the above technical solution, the connecting strip 400 is installed at the upper end of the connecting strip 400 between the door panels 500. The mating structure is a structure on the track connection structure for mating with the groove of the upper track 300. In a specific implementation, the screen door may only include the first connecting structure 100, or it may only include the second connecting structure 200, or it may include both the first connecting structure 100 and the second connecting structure 200. The connection strip 400 is supported by the lower track on the bottom side of the door frame, with the support height sufficient to support the sleeve 6 so that it is embedded in the groove of the upper track 300. In this application, during the adjustment of the screen door opening area, the connecting seat 7 moves synchronously with the swinging and rotating motion or rotational tendency of the connecting strip 400. When the sleeve 6 contacts and squeezes the groove... After pressing, during the sliding process of the track connection structure along the upper track 300, under the frictional force provided by the sleeve 6 on the surface of the groove, the sleeve 6 rotates relative to the connecting seat 7, reducing the resistance during the adjustment of the screen door opening area and reducing the wear rate of the groove surface on the track connection structure. Therefore, this solution can effectively avoid the existing technology where the connecting part between the connecting seat 7 and the connecting strip 400 (which does not have the connecting structure of the sleeve 6) is fixed relative to the connecting seat 7. Because the connecting part is dry friction with the surface of the groove, the door opening area adjustment is hindered due to frictional resistance, the track connection structure strength decreases sharply due to the fast wear rate, and the matching accuracy between the track connection structure and the groove decreases sharply due to the fast wear rate. This achieves the purpose of effectively reducing the failure rate of folding doors and extending the service life of folding doors.

[0060] As those skilled in the art, the upper track 300 and the door panel 500 are connected by a track connection structure. The function of the upper track 300 is to constrain the position of one end of each door panel 500 in the width direction within the groove of the upper track 300. The above-mentioned mating structure can be any structure that mates with the groove and has related functions. For example, for the above-mentioned first connection structure 100, it can be that only a single roller 5 is configured on the connecting frame 4. For example, the midpoint of the roller's axle is located on the center line of the connecting bar 400. The difference between the above scheme and the prior art is that a sleeve 6 that can rotate relative to the connecting seat 7 is configured on the connecting seat 7. The sleeve 6 is a component on the track connection structure that is in contact with the surface of the groove. When the track connection structure slides along the upper track 300, swings in the width direction of the upper track 300, or the connecting bar 400 twists or has a twisting tendency, the sleeve 6 rotates relative to the connecting seat 7 to optimize the force on the contact surface of the track connection structure that is in contact with the groove and to optimize the movement resistance of the track connection structure.

[0061] Example 2: This embodiment is a further refinement of embodiment 1: The track connection structure includes a first connection structure 100, which includes a connecting seat 7 and a mating structure. The mating structure includes a sleeve 6, a connecting frame 4, and a roller 5. The upper end of the connecting seat 7 is provided with a cylindrical section 3. The sleeve 6 is rotatably mounted on the cylindrical section 3 through the central hole thereon. The connecting frame 4 is rotatably mounted on the cylindrical section 3 through the through hole thereon. The connecting frame 4 is located above the sleeve 6. Rollers 5 are installed at both ends of the connecting frame 4.

[0062] The above provides a specific implementation of a track connection structure, specifically an implementation with rollers 5 on the structure. In the application to a screen door, the lower end of the connecting seat 7 is fixedly connected to the upper end of the connecting strip 400. The cylindrical section 3 is a tubular structure at the upper end of the connecting seat 7. The sleeve 6 and the connecting frame 4 are rotatably mounted on the cylindrical section 3. The sleeve 6 is stacked on the stepped surface of the connecting seat 7, and the connecting frame 4 is located above the sleeve 6. In this application, for the upper track 300 with a T-shaped groove, the structure formed by the connecting frame 4 and the rollers 5 is accommodated in the wheel groove 10 inside the groove. The rollers 5 are supported on the wheel groove 10, and the sleeve 6 is located in the connecting groove 11 outside the groove. When... When the connecting strip 400 sways and the sleeve 6 comes into contact with the surface of the connecting groove 11, the sleeve 6 rotates relative to the cylindrical section 3 to optimize the stress on the track connection structure and protect the position on the track connection structure that is in contact with the connecting groove 11. Furthermore, this solution uses a connecting frame 4 that can be rotatably installed on the cylindrical section 3. For the deflection of the connecting frame 4 synchronously with the connecting strip 400, the structural form of the connecting frame 4 and the cylindrical section 3 allows the cylindrical section 3 to swing relative to the connecting frame 4. When the connecting frame 4 has a stable posture, the structure formed by the connecting strip 400 and the connecting seat 7 can deflect freely, thereby optimizing the stress on the connecting strip 400 and the connecting seat 7 under the deflection force from the door panel 500.

[0063] Example 3: This embodiment is a further refinement of embodiment 2: The connecting frame 4 is floatingly fitted onto the cylindrical section 3, and the floating fit means that the connecting frame 4 can slide along the axis of the cylindrical section 3.

[0064] The above provides a form of cooperation between the connecting frame 4 and the cylindrical section 3. With this solution, when the roller 5 is constrained in the wheel groove 10, the connecting frame 4 can slide relative to the cylindrical section 3, so that the connecting frame 4 has the freedom to move relative to the connecting strip 400 along the axis of the connecting strip 400. In view of the possible deformation of the screen door frame during use, as well as the obstacles that may appear in the upper and lower tracks that affect the sliding of the connecting structure at both ends of the connecting strip 400, the sliding of the connecting frame 4 along the axis of the cylindrical section 3 can effectively improve the adaptability of the door panel 500 to the deformation and obstacles, and make the connecting strip 400 move more smoothly along the upper and lower tracks with less resistance. In practical applications, due to the constraint of the wheel body by the wheel groove 10 and the constraint of the cylindrical section 3 by the through hole on the connecting frame 4, the connecting frame 4, through the cylindrical section 3 and the connecting seat 7, is used to limit the position of the connecting bar 400 in the width direction of the wheel groove 10. The connecting structure at the lower end of the connecting bar 400 can provide support for the connecting bar 400. The cooperation between the connecting frame 4 and the cylindrical section 3 can adopt any form that can achieve the floating cooperation. For example, it is not necessary to set any component on the track connecting structure to constrain the connecting frame 4 to slide on the axis of the cylindrical section 3. The following scheme of using a helical spring 2 to constrain the connecting frame 4 is one preferred scheme. Specifically, by adjusting the depth of the connecting screw 1 embedded in the cylindrical section 3, while the connecting seat 7 is fixed at the upper end of the connecting bar 400 by the connecting screw 1, the helical spring 2 is compressed into an elastic deformation state by the screw head of the connecting screw 1. This allows the helical spring 2 to press the connecting frame 4 down to a state where the roller 5 can make good contact with the bottom side of the wheel groove 10, thereby improving the smoothness of the connecting bar 400 sliding along the track.

[0065] Example 4: This embodiment is a further refinement of embodiment 3: It also includes a connecting screw 1, which passes through the connecting seat 7 through the screw hole 12 on the connecting seat 7. The central hole of the cylindrical section 3 serves as a partial hole section of the screw hole 12. The upper end of the connecting screw 1 has a nail head. A helical spring 2 is arranged between the nail head and the connecting frame 4. The upper end of the helical spring 2 acts on the nail head, and the lower end of the helical spring 2 acts on the connecting frame 4.

[0066] As described above, this solution provides a technical solution that uses a connecting screw 1 to connect the connecting seat 7 and the connecting strip 400 (the upper end of the connecting strip 400 is provided with a connecting hole for embedding the lower end of the connecting screw 1), and uses the screw head of the connecting screw 1 and the helical spring 2 to constrain the contact state between the roller 5 and the wheel groove 10.

[0067] Example 5: This embodiment is a further refinement of embodiment 4: The through hole on the connecting frame 4 is a stepped hole with an upper diameter larger than the lower diameter, and the lower end of the helical spring 2 acts on the stepped surface of the stepped hole; the cylindrical section 3 is located inside the helical spring 2.

[0068] The above provides a specific assembly form of the helical spring 2. By using this solution, the position of the cylindrical section 3 in the radial direction of the through hole is constrained by the through hole of the connecting frame 4, and the position of the helical spring 2 in the radial direction of the through hole is constrained by the upper end of the stepped hole. This can effectively prevent the floating fit from being interfered with by the contact between the helical spring 2 and the upper end of the cylindrical section 3 during the sliding process of the connecting frame 4 along the cylindrical section 3.

[0069] Example 6: This embodiment is a further refinement of embodiment 4: The lower end of the connector 7 is provided with two insert rods 9, and the two insert rods 9 form a gap for clamping the connecting screw 1.

[0070] The above solution provides a technical solution to improve the connection strength between the connecting seat 7 and the connecting strip 400 by inserting the insertion rod 9 into the upper end hole of the connecting strip 400 when the connecting seat 7 and the connecting strip 400 are fixed. As a preferred method, in order to avoid pre-drilling threaded holes for connecting screws 1 in the upper end hole of the connecting strip 400, after the insertion rod 9 is inserted into the connecting strip 400, the sidewall of the hole on the connecting strip 400 constrains the insertion rod 9 to be close to each other, and the gap width between the connecting screws 1 is smaller than the outer diameter of the connecting screws 1. Under this application, during the process of the connecting screws 1 being embedded in the gap, the insertion rod 9 is tightened in the hole of the connecting strip 400 by the connecting screws 1, and a reliable connection between the connecting seat 7 and the connecting strip 400 is completed in a strength expansion connection manner while simplifying the structure and processing of the connecting strip 400.

[0071] Example 7: This embodiment is a further refinement of embodiment 6: The two insertion rods 9 are symmetrical with respect to the center line of the screw hole 12.

[0072] The above provides a specific arrangement of the relative positions of the insertion rod 9. By adopting this scheme, the best strength expansion joint quality can be obtained.

[0073] Example 8: This embodiment is a further refinement of embodiment 2: The connecting seat 7 is provided with two mounting holes 8 for adapting to the swing shaft of the door panel 500.

[0074] The above provides a technical solution that utilizes mounting holes 8 on the connecting seat 7 to accommodate the end of the swing shaft of the door panel 500. Specifically, the ends of the swing shafts on the door panels 500 on both sides of the connecting strip 400 are respectively inserted into the mounting holes 8 on different sides of the connecting seat 7. This structural design not only improves the overall aesthetics of the screen door, but also uses the bottom of the upper end of the mounting hole 8 to constrain the position of the door panel 500 in the length direction of the connecting strip 400, so as to prevent the door panel 500 from coming out from above the connecting strip 400, thus achieving a reliable connection between the door panel 500 and the connecting strip 400.

[0075] Example 9: This embodiment is a further refinement of embodiment 2: The track connection structure includes a second connection structure 200, which includes a connecting seat 7 and a mating structure, the mating structure including a sleeve 6; The upper end of the connecting seat 7 is provided with a cylindrical section 3, and the sleeve 6 is rotatably installed on the cylindrical section 3 through the central hole thereon.

[0076] The above provides another implementation of the track connection structure. The second connection structure 200 differs from the first connection structure 100 in that it does not have a connecting frame 4 on the cylindrical section 3. Specifically, the sleeve 6 is inserted into the communicating groove 11 of the upper track 300. Compared to the first connection structure 100, which has a connecting frame 4 and rollers 5, the second connection structure 200's constraint capability on the connecting strip 400 is not as strong as that of the first connection structure 100 because the wheel groove 10 and rollers 5 cannot be used to constrain the connecting seat 7. During the process of changing the shape of the screen door leaf, the chance and contact force between the sleeve 6 on the second connecting structure 200 and the side wall of the connecting groove 11 are greater than those between the sleeve 6 on the first connecting structure 100 and the side wall of the connecting groove 11. Similar to the function of the sleeve 6 on the first connecting structure 100, the sleeve 6 on the second connecting structure 200 is also used to reduce the movement resistance of the connecting strip 400 below it, improve the movement flexibility of the connecting strip 400, and reduce the surface damage to the track connecting structure caused by the side wall of the connecting groove 11 by rotating relative to the cylindrical section 3.

[0077] It should be noted that although the second connecting structure 200 is less effective than the first connecting structure 100 in constraining the connecting strip 400, the second connecting structure 200 is still proposed as a track connection structure. The purpose is that, for the connecting strip 400 on the screen door that needs to cooperate with the upper track 300 through a track connection structure, along the length of the upper track 300, one or more second connecting structures 200 can be set between any adjacent first connecting structures 100. When the screen door is folded and stored to expand its opening area, since the second connecting structure 200 does not have a roller 5, this solution can reduce or avoid interference between the rollers 5 on different first connecting structures 100, reduce the distance between adjacent connecting strips 400, and achieve a tighter folding of the door panel 500. This reduces the volume of the folded door panel 500 and expands the actual opening area of ​​the screen door, while avoiding the problem of insufficient constraint of the upper track 300 on the connecting strip 400 due to the absence of the first connecting structure 100.

[0078] Example 10: This embodiment is a further refinement of embodiment 9: It also includes a connecting screw 1, which passes through the connecting seat 7 through the screw hole 12 on the connecting seat 7. The central hole of the cylindrical section 3 serves as a partial hole section of the screw hole 12. The upper end of the connecting screw 1 has a nail head. The sleeve 6 is locked between the stepped surface on the connecting seat 7 and the nail head.

[0079] In the above scheme, the connecting screw 1 is not only used to complete the fixed connection of the connecting seat 7 to the upper end of the connecting strip 400, but also uses the screw head to prevent the sleeve 6 from coming off the upper end of the track connection structure. In a specific embodiment, the length of the connecting screw 1 is such that when a reliable connection with the connecting strip 400 is established, there is a gap between the upper end of the sleeve 6 and the lower end of the screw head. This gap is used to prevent the sleeve 6 from being locked on the cylindrical section 3.

[0080] Example 11: This embodiment is a further refinement of embodiment 10: The lower end of the connector 7 is provided with two insert rods 9, and the two insert rods 9 form a gap for clamping the connecting screw 1.

[0081] The above solution provides a technical solution to improve the connection strength between the connecting seat 7 and the connecting strip 400 by inserting the insertion rod 9 into the upper end hole of the connecting strip 400 when the connecting seat 7 and the connecting strip 400 are fixed. As a preferred method, in order to avoid pre-drilling threaded holes for connecting screws 1 in the upper end hole of the connecting strip 400, after the insertion rod 9 is inserted into the connecting strip 400, the sidewall of the hole on the connecting strip 400 constrains the insertion rod 9 to be close to each other, and the gap width between the connecting screws 1 is smaller than the outer diameter of the connecting screws 1. Under this application, during the process of the connecting screws 1 being embedded in the gap, the insertion rod 9 is tightened in the hole of the connecting strip 400 by the connecting screws 1, and a reliable connection between the connecting seat 7 and the connecting strip 400 is completed in a strength expansion connection manner while simplifying the structure and processing of the connecting strip 400.

[0082] Example 12: This embodiment is a further refinement of embodiment 11: The two insertion rods 9 are symmetrical with respect to the center line of the screw hole 12.

[0083] The above provides a specific arrangement of the relative positions of the insertion rod 9. By adopting this scheme, the best strength expansion joint quality can be obtained.

[0084] Example 13: Based on Embodiment 11, this embodiment provides a folding door, including an upper track 300 and a door leaf. The door leaf is formed by splicing multiple door panels 500. Any adjacent door panels 500 are connected by a connecting strip 400, and any adjacent door panels 500 form a rotatable connection relationship. Among the connecting strips 400, the connecting strip 400 used to connect with the upper track 300 is slidably connected to the upper track 300 through the track connection structure described in Embodiment 1. The connecting seat 7 is fixedly connected to the upper end of the connecting strip 400.

[0085] The above provides a folding door including the aforementioned track connection structure. For those skilled in the art, when the door panel 500 of the screen door is made of other materials, such as polymer materials, it should be understood as an equivalent solution. Using metal mesh for the door panel 500 is merely a safety-oriented approach. According to the above description of the track connection structure, the folding door using the above track 300 connection structure effectively reduces the failure rate of the folding door, extends its service life, and improves the smoothness of adjusting the screen door panel shape.

[0086] Example 14: This embodiment is a further refinement based on Embodiments 13 and 2: The upper track 300 is provided with a strip-shaped groove, the groove including a wheel groove 10 and a connecting groove 11. The wheel groove 10 is located on the inner side of the groove, the connecting groove 11 is located on the outer side of the groove, and the connecting groove 11 is located at the middle position of the wheel groove 10. The track connection structure includes a first connection structure 100, which includes a connecting seat 7 and a mating structure. The mating structure includes a sleeve 6, a connecting frame 4, and a roller 5. The upper end of the connecting seat 7 is provided with a cylindrical section 3, and the sleeve 6 is rotatably mounted on the cylindrical section 3 through the central hole thereon. The connecting frame 4 is rotatably mounted on the cylindrical section 3 through the through hole thereon. The connecting frame 4 is located above the sleeve 6, and rollers 5 are installed at both ends of the connecting frame 4. The sleeve 6 passes through the connecting groove 11, and the connecting structure formed by the connecting frame 4 and the roller 5 is installed in the wheel groove 10.

[0087] Based on the above description of the track connection structure, the above technical solution is a specific application of the first connection structure 100 in a folding door, that is, providing a folding door including the first connection structure 100. In specific implementation, the wheel groove 10 can be any wheel groove 10 that can accommodate and support the roller 5. As a way to facilitate the constraint of the upper track 300 on the screen door leaf, the wheel groove 10 adopts a contour design similar to the shape of the roller 5. The center of the roller 5 wheel surface is convex, and the center of the wheel groove 10 constrains the position of the roller 5. In this implementation, by constraining the position of the roller 5 in the width direction of the wheel groove 10 through the wheel groove 10, the purpose of constraining the position of the connecting strip 400 in the width direction of the wheel groove 10 is achieved.

[0088] Example 15: This embodiment is a further refinement based on Embodiments 14 and 3: The connecting frame 4 is floatingly fitted onto the cylindrical section 3, and the floating fit means that the connecting frame 4 can slide along the axis of the cylindrical section 3.

[0089] The above describes the application of the first connecting structure 100, which can float on the cylindrical section 3, in a folding door. According to the above description, this implementation method can optimize the adaptability of the screen door leaf to track deformation and improve the obstacle-crossing performance of the connecting strip 400 moving along the track when the screen door leaf is deformed.

[0090] Example 16: This embodiment is a further refinement based on Embodiments 15 and 4: It also includes a connecting screw 1, which passes through the connecting seat 7 through the screw hole 12 on the connecting seat 7. The central hole of the cylindrical section 3 serves as a partial hole section of the screw hole 12. The upper end of the connecting screw 1 has a nail head. A helical spring 2 is arranged between the nail head and the connecting frame 4. The upper end of the helical spring 2 acts on the nail head, and the lower end of the helical spring 2 acts on the connecting frame 4. The connecting seat 7 is fixedly connected to the upper end of the connecting strip 400 by the connecting screw 1.

[0091] The above describes the application of the first connecting structure 100 on a folding door, where the connecting frame 4 can float on the cylindrical section 3 and the downward pressure of the connecting frame 4 by the helical spring 2 ensures the contact quality between the roller 5 and the wheel groove 10. According to the above description, this solution is a technical solution that can improve the smoothness of the connecting strip 400 sliding along the track.

[0092] Example 17: This embodiment is a further refinement based on Embodiments 13 and 9: The upper track 300 is provided with a strip-shaped groove, the groove including a wheel groove 10 and a connecting groove 11. The wheel groove 10 is located on the inner side of the groove, the connecting groove 11 is located on the outer side of the groove, and the connecting groove 11 is located at the middle position of the wheel groove 10. The track connection structure includes a second connection structure 200, which includes a connecting seat 7 and a mating structure, the mating structure including a sleeve 6; The upper end of the connecting seat 7 is provided with a cylindrical section 3, and the sleeve 6 is rotatably installed on the cylindrical section 3 through the central hole thereon; The sleeve 6 is located in part or entirely in the communicating groove 11.

[0093] As described above, this solution is a specific application of the second connecting structure 200 on a folding door. The track connecting structure of the second connecting structure 200 can be used to reduce the volume of the screen door after folding and increase the opening area of ​​the screen door. It is easy to understand that the groove adapted to the second connecting structure 200 adopts a design including wheel groove 10 and connecting groove 11, so as to achieve that the groove is still suitable for the installation of the first connecting structure 100, thereby enabling the first connecting structure 100 and the second connecting structure 200 to be used together on the upper track 300.

[0094] Example 18: This embodiment is a further refinement based on Embodiments 17 and 10: It also includes a connecting screw 1, which passes through the connecting seat 7 through the screw hole 12 on the connecting seat 7. The central hole of the cylindrical section 3 serves as a partial hole section of the screw hole 12. The upper end of the connecting screw 1 has a nail head. The sleeve 6 is locked between the stepped surface on the connecting seat 7 and the nail head. The connecting seat 7 is fixedly connected to the upper end of the connecting strip 400 by the connecting screw 1.

[0095] As described above, this solution is a specific application of the second connection structure 200, including the connecting screw 1, on a folding door.

[0096] Example 19: This embodiment is a further refinement based on Embodiments 13, 14, and 17: The upper track 300 is provided with a strip-shaped groove, the groove including a wheel groove 10 and a connecting groove 11. The wheel groove 10 is located on the inner side of the groove, the connecting groove 11 is located on the outer side of the groove, and the connecting groove 11 is located at the middle position of the wheel groove 10. The track connection structure includes a first connection structure 100, which includes a connecting seat 7 and a mating structure. The mating structure includes a sleeve 6, a connecting frame 4, and a roller 5. The upper end of the connecting seat 7 is provided with a cylindrical section 3, and the sleeve 6 is rotatably mounted on the cylindrical section 3 through the central hole thereon. The connecting frame 4 is rotatably mounted on the cylindrical section 3 through the through hole thereon. The connecting frame 4 is located above the sleeve 6, and rollers 5 are installed at both ends of the connecting frame 4. The sleeve 6 passes through the connecting groove 11, and the connecting structure formed by the connecting frame 4 and the roller 5 is installed in the wheel groove 10; The track connection structure includes a second connection structure 200, which includes a connecting seat 7 and a mating structure, the mating structure including a sleeve 6; The upper end of the connecting seat 7 is provided with a cylindrical section 3, and the sleeve 6 is rotatably installed on the cylindrical section 3 through the central hole thereon; The sleeve 6 is located in part or entirely in the communicating groove 11; In the extension direction of the upper track 300, a second connecting structure 200 is arranged between each adjacent first connecting structure 100.

[0097] As described above, this solution involves the combined application of the first connecting structure 100 and the second connecting structure 200 on a folding door. This application not only ensures the constraint of the upper track 300 on the screen door leaf, but also makes the folded screen door leaf smaller, thus ensuring a larger opening area for the screen door.

[0098] Example 20: This embodiment is a further refinement based on Embodiments 13 and 6, or Embodiments 13 and 11: The lower end of the connecting seat 7 is provided with two insertion rods 9. Both insertion rods 9 are inserted into the insertion holes provided at the upper end of the connecting strip 400. The two insertion rods 9 form a gap for clamping the connecting screw 1. The connecting seat 7 and the upper end of the connecting strip 400 are fixedly connected by the connecting screw 1.

[0099] Based on the above description, this solution is a folding door implementation that optimizes the connection strength between the connecting strip 400 and the connecting seat 7 by using two insert rods 9. Preferably, after the insert rods 9 are inserted into the connecting strip 400, the sidewall of the hole on the connecting strip 400 constrains the insert rods 9 to be close to each other, and the gap width between the connecting screws 1 is smaller than the outer diameter of the connecting screws 1. During the process of the connecting screws 1 being embedded in the gap, the insert rods 9 are tightened in the hole of the connecting strip 400 by the connecting screws 1 (the connecting screws 1 provide an outward compressive force to the insert rods 9), and the connecting seat 7 and the connecting strip 400 are reliably connected by a strength expansion connection.

[0100] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific embodiments of the present invention are limited to these descriptions. For those skilled in the art, other embodiments derived without departing from the technical solution of the present invention should be included within the scope of protection of the present invention.

Claims

1. A folding door track connection structure, comprising a connecting seat (7) for connecting to the upper end of a connecting strip (400), wherein the connecting seat (7) is provided with a mating structure for mating with a groove on an upper track (300), characterized in that, The mating structure includes a sleeve (6) mounted on the connecting seat (7) and rotatable relative to the connecting seat (7).

2. The folding door track connection structure according to claim 1, characterized in that, The track connection structure includes a first connection structure (100), the first connection structure (100) includes a connecting seat (7) and a mating structure, the mating structure includes a sleeve (6), a connecting frame (4) and a roller (5); The upper end of the connecting seat (7) is provided with a cylindrical section (3), and the sleeve (6) is rotatably installed on the cylindrical section (3) through the central hole thereon. The connecting frame (4) is rotatably installed on the cylindrical section (3) through the through hole thereon. The connecting frame (4) is located above the sleeve (6), and rollers (5) are installed at both ends of the connecting frame (4).

3. The folding door track connection structure according to claim 2, characterized in that, The connecting frame (4) is floatingly fitted onto the cylindrical section (3), and the floating fit means that the connecting frame (4) can slide along the axis of the cylindrical section (3).

4. The folding door track connection structure according to claim 3, characterized in that, It also includes a connecting screw (1), which passes through the connecting seat (7) through the screw hole (12) on the connecting seat (7). The central hole of the cylindrical section (3) serves as a partial hole segment of the screw hole (12). The upper end of the connecting screw (1) has a nail head. A helical spring (2) is arranged between the nail head and the connecting frame (4). The upper end of the helical spring (2) acts on the nail head, and the lower end of the helical spring (2) acts on the connecting frame (4).

5. The folding door track connection structure according to claim 4, characterized in that, The through hole on the connecting frame (4) is a stepped hole with an upper diameter larger than the lower diameter, and the lower end of the helical spring (2) acts on the stepped surface of the stepped hole; the cylindrical section (3) is located inside the helical spring (2).

6. The folding door track connection structure according to claim 4, characterized in that, The lower end of the connector (7) is provided with two insert rods (9), and the two insert rods (9) form a gap for clamping the connecting screw (1).

7. The folding door track connection structure according to claim 6, characterized in that, The two inserts (9) are symmetrical with respect to the center line of the screw hole (12).

8. The folding door track connection structure according to claim 2, characterized in that, The connecting seat (7) is provided with two mounting holes (8) for adapting the door panel swing shaft.

9. The folding door track connection structure according to claim 2, characterized in that, The track connection structure includes a second connection structure (200), the second connection structure (200) includes a connecting seat (7) and a mating structure, the mating structure including a sleeve (6); The upper end of the connecting seat (7) is provided with a cylindrical section (3), and the sleeve (6) is rotatably installed on the cylindrical section (3) through the central hole thereon.

10. The folding door track connection structure according to claim 9, characterized in that, It also includes a connecting screw (1), which passes through the connecting seat (7) through the screw hole (12) on the connecting seat (7), the center hole of the cylindrical section (3) serves as a partial hole segment of the screw hole (12), the upper end of the connecting screw (1) has a nail head, and the sleeve (6) is locked between the stepped surface on the connecting seat (7) and the nail head.

11. The folding door track connection structure according to claim 10, characterized in that, The lower end of the connector (7) is provided with two insert rods (9), and the two insert rods (9) form a gap for clamping the connecting screw (1).

12. The folding door track connection structure according to claim 11, characterized in that, The two inserts (9) are symmetrical with respect to the center line of the screw hole (12).

13. A folding door, comprising an upper track (300) and door panels, wherein the door panels are formed by splicing multiple door pieces (500), and any adjacent door pieces (500) are connected by connecting strips (400), and any adjacent door pieces (500) form a mutually rotatable connection, characterized in that, In the connecting strip (400), the connecting strip (400) used to connect with the upper rail (300) is slidably connected to the upper rail (300) through the rail connection structure described in claim 1, and the connecting seat (7) is fixedly connected to the upper end of the connecting strip (400).

14. The folding door according to claim 13, characterized in that, The upper track (300) is provided with a strip-shaped groove, the groove including a wheel groove (10) and a connecting groove (11). The wheel groove (10) is located inside the groove, and the connecting groove (11) is located outside the groove. The connecting groove (11) is located at the middle of the wheel groove (10). The track connection structure includes a first connection structure (100), the first connection structure (100) includes a connecting seat (7) and a mating structure, the mating structure includes a sleeve (6), a connecting frame (4) and a roller (5); The upper end of the connecting seat (7) is provided with a cylindrical section (3), the sleeve (6) is rotatably mounted on the cylindrical section (3) through the central hole thereon, the connecting frame (4) is rotatably mounted on the cylindrical section (3) through the through hole thereon, the connecting frame (4) is located above the sleeve (6), and rollers (5) are installed at both ends of the connecting frame (4). The sleeve (6) passes through the connecting groove (11), and the connecting structure formed by the connecting frame (4) and the roller (5) is installed in the wheel groove (10).

15. The folding door according to claim 14, characterized in that, The connecting frame (4) is floatingly fitted onto the cylindrical section (3), and the floating fit means that the connecting frame (4) can slide along the axis of the cylindrical section (3).

16. The folding door according to claim 15, characterized in that, It also includes a connecting screw (1), which passes through the connecting seat (7) through the screw hole (12) on the connecting seat (7). The center hole of the cylindrical section (3) serves as a partial hole segment of the screw hole (12). The upper end of the connecting screw (1) has a nail head. A helical spring (2) is arranged between the nail head and the connecting frame (4). The upper end of the helical spring (2) acts on the nail head, and the lower end of the helical spring (2) acts on the connecting frame (4). The connecting seat (7) and the upper end of the connecting strip (400) are fixedly connected by connecting screws (1).

17. The folding door according to claim 13, characterized in that, The upper track (300) is provided with a strip-shaped groove, the groove including a wheel groove (10) and a connecting groove (11). The wheel groove (10) is located inside the groove, and the connecting groove (11) is located outside the groove. The connecting groove (11) is located at the middle of the wheel groove (10). The track connection structure includes a second connection structure (200), the second connection structure (200) includes a connecting seat (7) and a mating structure, the mating structure including a sleeve (6); The upper end of the connecting seat (7) is provided with a cylindrical section (3), and the sleeve (6) is rotatably installed on the cylindrical section (3) through the central hole thereon; The sleeve (6) is partially or entirely located in the communicating groove (11).

18. The folding door according to claim 17, characterized in that, It also includes a connecting screw (1), which passes through the connecting seat (7) through the screw hole (12) on the connecting seat (7), the center hole of the cylindrical section (3) serves as a partial hole segment of the screw hole (12), the upper end of the connecting screw (1) has a nail head, and the sleeve (6) is locked between the stepped surface on the connecting seat (7) and the nail head. The connecting seat (7) and the upper end of the connecting strip (400) are fixedly connected by connecting screws (1).

19. The folding door according to claim 13, characterized in that, The upper track (300) is provided with a strip-shaped groove, the groove including a wheel groove (10) and a connecting groove (11). The wheel groove (10) is located inside the groove, and the connecting groove (11) is located outside the groove. The connecting groove (11) is located at the middle of the wheel groove (10). The track connection structure includes a first connection structure (100), the first connection structure (100) includes a connecting seat (7) and a mating structure, the mating structure includes a sleeve (6), a connecting frame (4) and a roller (5); The upper end of the connecting seat (7) is provided with a cylindrical section (3), the sleeve (6) is rotatably mounted on the cylindrical section (3) through the central hole thereon, the connecting frame (4) is rotatably mounted on the cylindrical section (3) through the through hole thereon, the connecting frame (4) is located above the sleeve (6), and rollers (5) are installed at both ends of the connecting frame (4). The sleeve (6) passes through the connecting groove (11), and the connecting structure formed by the connecting frame (4) and the roller (5) is installed in the wheel groove (10); The track connection structure includes a second connection structure (200), the second connection structure (200) includes a connecting seat (7) and a mating structure, the mating structure including a sleeve (6); The upper end of the connecting seat (7) is provided with a cylindrical section (3), and the sleeve (6) is rotatably installed on the cylindrical section (3) through the central hole thereon; The sleeve (6) is located in part or entirely in the communicating groove (11); In the extension direction of the upper track (300), a second connecting structure (200) is provided between each adjacent first connecting structure (100).

20. The folding door according to claim 13, characterized in that, The lower end of the connecting seat (7) is provided with two insert rods (9). Both insert rods (9) are inserted into the insertion holes provided at the upper end of the connecting strip (400). The two insert rods (9) form a gap for clamping the connecting screw (1). The connecting seat (7) and the upper end of the connecting strip (400) are fixedly connected by the connecting screw (1).

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