A track structure for a retractable window shade machine

Abstract

This utility model discloses a track structure for a telescopic curtain machine, including a first track and a second track. The first track includes a hollow first outer frame with a first opening at the bottom and a first transmission guide rail inside the first outer frame. The second track includes a hollow second outer frame with a second opening at the bottom and a second transmission guide rail inside the second outer frame. The second outer frame is slidably fitted inside the first outer frame, and the first transmission guide rail is located inside the second outer frame and spaced apart from it. The first opening and the second opening at least partially overlap in the length direction. This track structure enables telescopic cooperation between two tracks, each with its own drive components. The configured first and second transmission guide rails provide a safe and stable transmission space for the two sets of drive components without affecting the sliding cooperation between the first and second outer frames. The overall structure is stable and has strong resistance to vibrations caused by the two sets of drive components.

Description

Technical Field

[0001] This utility model relates to the field of electric curtain machine technology, and in particular to a track structure for a telescopic curtain machine. Background Technology

[0002] An electric curtain motor is a device that enables curtains to open and close automatically. A common example is the curtain motor disclosed in publication number CN209074097U, which has a synchronous belt installed in the track. The synchronous belt is driven by a motor and a synchronous pulley. Movable parts are fixedly installed on both sides of the synchronous belt. When the synchronous belt moves, the two movable parts will move towards each other along the track (approaching or moving away from each other). There are sliding curtain hooks in the track. The curtains are hung on the curtain hooks and movable parts. When the movable parts move, the curtains are opened or closed.

[0003] For mass production, electric curtain motors are typically prefabricated to set dimensions, making them difficult to adapt to windows of different sizes. Furthermore, custom-made electric curtain motors for specific sizes increase costs for consumers. Therefore, adjustable-length curtain motors have emerged, enabling mass production and adaptability to various window sizes. For example:

[0004] Prior Art 1: A motorized double-track telescopic curtain with publication number CN217659186U includes a first curtain track, a second curtain track, a drive motor, a transmission wheel assembly, a first transmission belt, and a second transmission belt. The first and second curtain tracks slide and extend together via an upper strip-shaped buckle engaging with an upper strip-shaped groove and a lower strip-shaped buckle engaging with a lower strip-shaped groove. A first trolley and a second trolley are respectively installed on the first and second curtain tracks. The first and second transmission belts are respectively installed within the first and second curtain tracks, with the first transmission belt located below or above the second transmission belt. The first transmission belt, located below or above the second transmission belt, is driven by the transmission wheel assembly.

[0005] Prior Art 2: A retractable curtain track disclosed in CN216569491U includes an inner track, an outer track, and a transmission unit. The inner track is connected to one side of the outer track and is embedded in the outer track, allowing it to slide along the outer track. The transmission unit includes a driving wheel, a driven wheel, a first fixed pulley, a second fixed pulley, and a transmission belt. The driving wheel and the driven wheel are located at opposite ends of the retractable curtain track. The driving wheel is connected to a motor. The first fixed pulley is located at the end of the outer track near the inner track, and the second fixed pulley is located at the end of the inner track near the outer track. The transmission belt includes a first connecting segment and a second connecting segment connected end-to-end. The first connecting segment cooperates with the driving wheel, and the second connecting segment is wound around the first and second fixed pulleys. The thickness of the transmission belt in the first connecting segment is greater than the thickness of the transmission belt in the second connecting segment.

[0006] The aforementioned telescopic curtain machines all use a synchronous belt arranged within two tracks via a complex transmission structure. This allows the motor to drive the synchronous belt even after the tracks are adjusted in length. However, the inventors discovered that this complex transmission structure makes the overall structure of the curtain machine extremely complex. This not only significantly increases the number and types of parts, requiring more precise connections and fits between components, but also necessitates the installation of numerous parts one by one according to a specific sequence and process during assembly. Even slight errors can lead to mistakes or loose fits, greatly increasing assembly difficulty and workload, reducing efficiency, and raising the defect rate, thus increasing production costs. Therefore, the inventors developed a telescopic curtain machine with two sets of drive components. Since existing curtain machine track structures are unsuitable, a new track structure needs to be developed. Utility Model Content

[0007] In view of this, the present invention proposes a track structure for a telescopic curtain machine, the purpose of which is to achieve telescopic cooperation between two tracks, each with its own drive component.

[0008] The solution provided by this utility model includes:

[0009] A track structure for a telescopic curtain machine, comprising:

[0010] First and second tracks;

[0011] The first track includes a hollow first outer frame, a first opening at the bottom of the first outer frame, a first transmission guide rail inside the first outer frame, and the vertical projection positions of the first transmission guide rail and the first opening are offset.

[0012] The second track includes a hollow second outer frame, a second opening at the bottom of the second outer frame, and a second transmission guide rail inside the second outer frame. The vertical projection positions of the second transmission guide rail and the second opening are offset.

[0013] The second outer frame is slidably sleeved inside the first outer frame, the first transmission guide rail is located inside the second outer frame and is spaced apart from the second transmission guide rail, and the first opening and the second opening at least partially overlap in the length direction.

[0014] As a further optional solution, a clearance is formed between the first outer frame and the first transmission guide rail for the insertion of the second outer frame.

[0015] As a further alternative, the first outer frame and the first transmission guide rail are an integral structure.

[0016] As a further alternative, the first outer frame and the first transmission guide rail are separate structures.

[0017] As a further optional solution, the first outer frame is slidably connected to the first transmission guide rail.

[0018] As a further optional solution, the first outer frame has a connecting plate extending upward from the first edge of its first opening, and the first transmission guide rail is integrally connected to the connecting plate.

[0019] As a further optional solution, the first outer frame has a connecting plate extending upward from the first edge of its first opening, and the first transmission guide rail is slidably connected to the connecting plate; the side of the connecting plate is provided with a groove, the first transmission guide rail is provided with an insert plate for inserting into the groove, the groove wall is provided with an upwardly protruding locking strip, and the bottom of the insert plate is provided with a locking slot for inserting the locking strip.

[0020] As a further optional solution, the first outer frame has a first baffle extending upward from the second edge of its second opening, and the first baffle and the side wall of the first outer frame together form a left and right limit for the second transmission guide rail; the inner top surface of the second outer frame has a second baffle extending downward, and the second baffle and the side wall of the second outer frame together form a left and right limit for the first transmission guide rail.

[0021] As a further optional solution, the first transmission guide rail has a first side opening on one side; the second transmission guide rail has a second side opening on one side.

[0022] As a further optional solution, the top of the first outer frame is provided with a first wiring groove; the top of the second outer frame is provided with a second wiring groove.

[0023] Compared with the prior art, the track structure for telescopic curtain machines of this application has at least the following advantages:

[0024] This track structure enables telescopic cooperation between two tracks, each with its own drive components. The configured first and second transmission guide rails provide a safe and stable transmission space for the two sets of drive components without affecting the sliding cooperation between the first and second outer frames. The overall structure is stable and has strong resistance to vibrations caused by the two sets of drive components (compared to the single drive component in the prior art, the vibrations caused by the two sets of drive components are stronger, requiring higher structural strength from the track). Attached Figure Description

[0025] Figure 1 This is a structural schematic diagram of a telescopic curtain machine according to an embodiment of this utility model (motor not shown);

[0026] Figure 2This is a front view schematic diagram of a telescopic curtain machine according to an embodiment of this utility model;

[0027] Figure 3 This is an exploded view of the first opening and closing unit and the second opening and closing unit in the embodiment of this utility model;

[0028] Figure 4 yes Figure 2 Sectional view of AA;

[0029] Figure 5 This is a schematic diagram of the structure of the power-conducting connection mechanism in an embodiment of this utility model;

[0030] Figure 6 This is a side sectional view of the first track in an embodiment of this utility model;

[0031] Figure 7 This is a side sectional view of the second track in an embodiment of this utility model;

[0032] Figure 8 This is an enlarged view of the junction of the first track and the second track in an embodiment of this utility model;

[0033] Figure 9 This is an exploded view of the first conductive component, the transfer component, and the second conductive component in an embodiment of this utility model;

[0034] Figure 10 This is a schematic diagram of the first and second tracks being fixed by a fixing component in an embodiment of this utility model;

[0035] Figure 11 This is a cross-sectional view of the sliding connection between the first and second tracks in an embodiment of this utility model;

[0036] Figure 12 This is a cross-sectional schematic diagram of the first track in one embodiment of the present invention;

[0037] Figure 13 This is a cross-sectional schematic diagram of the second track in an embodiment of this utility model;

[0038] Figure 14 This is a cross-sectional schematic diagram of the first track in another embodiment of the present invention;

[0039] Figure 15 yes Figure 14 A schematic diagram of the connecting plate and the insert plate in the embodiment;

[0040] In the diagram: 1. First opening / closing unit; 11. First track; 111. First outer frame; 1111. First opening; 1112. Connecting plate; 11121. Groove; 11122. Locking strip; 1113. First baffle; 1114. First wiring groove; 112. First transmission guide rail; 1121. First side opening; 1122. Insert plate; 11221. Locking slot; 113. Clearance gap; 12. First moving part; 13. First drive assembly; 131. First motor; 132. First driving wheel; 133. First driven wheel; 14. First transmission box; 15. First mounting shell;

[0041] 2. Second opening / closing unit; 21. Second track; 211. Second outer frame; 2111. Second opening; 2112. Second baffle; 2113. Second wiring channel; 212. Second transmission guide rail; 2121. Second side opening; 22. Second moving part; 23. Second drive assembly; 231. Second motor; 232. Second driving wheel; 233. Second driven wheel; 24. Second transmission box; 25. Second mounting shell;

[0042] 3. Fixing components;

[0043] 4. Electrical connection mechanism; 41. First conductive component; 42. Second conductive component; 421. Adhesive strip; 43. Transfer component; 431. Substrate; 432. Contact conductive sheet;

[0044] 5. Protective sleeve. Detailed Implementation

[0045] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0046] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0047] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0048] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0049] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0050] refer to Figure 11 This utility model discloses a track structure for a telescopic curtain machine, including a first track and a second track; the first track includes a hollow first outer frame, a first opening at the bottom of the first outer frame, and a first transmission guide rail inside the first outer frame, the vertical projection positions of the first transmission guide rail and the first opening being offset; the second track includes a hollow second outer frame, a second opening at the bottom of the second outer frame, and a second transmission guide rail inside the second outer frame, the vertical projection positions of the second transmission guide rail and the second opening being offset; the second outer frame is slidably fitted inside the first outer frame, the first transmission guide rail is located inside the second outer frame and spaced apart from the second transmission guide rail, and the first opening and the second opening at least partially overlap in the length direction.

[0051] This track structure allows for telescopic cooperation between two tracks, each equipped with its own drive components. The configured first and second transmission guide rails provide a safe and stable transmission space for the two sets of drive components without affecting the sliding cooperation between the first and second outer frames. The overall structure is stable and highly resistant to vibrations from the two sets of drive components (compared to existing technologies with a single drive component, the vibrations from two sets of drive components are stronger, requiring higher structural strength from the track).

[0052] To better understand the advantages of the above track structure, the following section introduces the telescopic curtain machine.

[0053] refer to Figure 1-3 The illustration shows a telescopic curtain machine, including a first opening and closing unit 1, a second opening and closing unit 2, and a fixing component 3;

[0054] The first opening and closing unit 1 includes a first track 11, a first movable member 12 disposed within the first track 11 for connecting the curtain, and a first driving component 13 disposed on the first track 11 for driving the first movable member 12 to move; the second opening and closing unit 2 includes a second track 21, a second movable member 22 disposed within the second track 21 for connecting the curtain, and a second driving component 23 disposed on the second track 21 for driving the second movable member 22 to move; wherein the second track 21 is slidably connected to the first track 11, and the fixing component 3 is used to fix the first track 11 and the second track 21 relative to each other.

[0055] Specifically, in this embodiment, the first opening / closing unit 1 and the second opening / closing unit 2 are structurally capable of independently opening and closing the curtains, each having its own independent drive components (i.e., the first drive component 13 and the second drive component 23). This eliminates the need for the complex transmission structure used in existing technologies that arranges a synchronous belt within two tracks, greatly simplifying the overall structure and reducing the number and types of parts. The first opening / closing unit 1 and the second opening / closing unit 2 adopt a structure similar to a typical non-retractable curtain machine. This mature and simple structural design effectively reduces assembly difficulty and improves assembly efficiency compared to existing retractable curtain machines.

[0056] Generally, there are multiple first moving parts 12 / second moving parts 22. Taking the first opening and closing unit 1 as an example, multiple first moving parts 12 are movably arranged in the first track 11. The curtain is hung on multiple first moving parts 12. The first driving component 13 drives one first moving part 12 to move. The driven first moving part 12 will drive other first moving parts 12 to move, thereby realizing the opening and closing of the curtain.

[0057] In the above embodiments, when applied, the first opening and closing unit 1 and the second opening and closing unit 2 can be assembled and debugged before leaving the factory. After arriving at the site, it is only necessary to adjust the overall length of the curtain machine by sliding and extending the first track 11 and the second track 21 according to the site dimensions. After adjustment, the first track 11 and the second track 21 are fixed by the fixing component 3, so that the overall length of the curtain machine is fixed.

[0058] The first opening and closing unit 1 and the second opening and closing unit 2 can be controlled independently or jointly.

[0059] In some embodiments, to facilitate the synchronous operation of the first opening / closing unit 1 and the second opening / closing unit 2, such as Figure 4 , 5As shown in Figures 8 and 9, the system also includes an energized connection mechanism 4, which comprises two independent first conductive members 41, two independent second conductive members 42, and a transfer member 43. The transfer member 43 includes two contact conductive pieces 432. The first conductive members 41 are disposed on the first track 11, and one end of each of the two first conductive members 41 is electrically connected to the first driving assembly 13, while the other end is electrically connected to the two contact conductive pieces 432 respectively. The second conductive members 42 are disposed on the second track 21, and one end of each of the second conductive members 42 is electrically connected to the second driving assembly 23. The two second conductive members 42 are in sliding contact with the two contact conductive pieces 432 respectively.

[0060] Specifically, the transfer unit is fixed relative to the first track 11. When the overall length of the first track 11 and the second track 21 is adjusted, for example, by moving the second track 21, the second track 21 and the second conductive component 42 will move synchronously. The contact conductive piece 432 of the second conductive component 42 and the transfer component 43 will maintain contact and conduction during the relative sliding process. In this way, the telescopic adjustment function can be realized while maintaining the path connection between the first drive component 13 and the second drive component 23, which facilitates the synchronous operation of the first opening and closing unit 1 and the second opening and closing unit 2. There is no need to wire the first opening and closing unit 1 and the second opening and closing unit 2 separately. When the power connection mechanism 4 is set, only one of the first opening and closing unit 1 or the second opening and closing unit 2 needs to be wired.

[0061] In a more preferred embodiment, the first conductive component 41 is an electrical wire, and the second conductive component 42 is a long strip of metal, such as copper strip; wherein the electrical wire is coated with insulating adhesive; for example... Figure 4 As shown, the second conductive component 42 is disposed on an adhesive strip 421, and the adhesive strip 421 is provided with an installation groove, so that the second conductive component 42 is isolated from the second track 21 and is at least partially exposed, so as to achieve sliding contact with the contact conductive sheet 432 of the transfer component 43.

[0062] In some embodiments, such as Figure 8 and Figure 9 As shown, the transfer component 43 also includes a substrate 431, which is made of insulating material. The contact conductive sheet 432 is a metal sheet disposed on the substrate 431. The contact conductive sheet 432 is configured to be pressed into contact with the second conductive member 42 under the action of elastic force.

[0063] In this embodiment, the substrate 431 is fixed relative to the first track 11. For example, the substrate 431 can be detachably fixed on the first track 11. The contact conductive element is pressed against the second conductive member 42 by the elastic force, which makes the conductive connection between the contact conductive element and the second conductive member 42 more stable. Even if there are unevenness on the second conductive member 42 or it is affected by vibration, it can ensure that the contact conductive element and the second conductive member 42 are in close contact.

[0064] The elastic force acting on the conductive contact can originate from itself, for example, by being a bent spring structure. Alternatively, the elastic force acting on the conductive contact can originate from the outside, for example, by providing an elastic element that acts elastically on the substrate 431, causing the conductive contact 432 to press against the second conductive member 42.

[0065] In some embodiments, such as Figure 3 and Figure 5 As shown, a protective sleeve 5 is provided between the first track 11 and the second track 21, and the protective sleeve 5 is fixed relative to the first track 11.

[0066] In this embodiment, the sheath 5 can be used to cover the connection position between the first track 11 and the second track 21, making the overall aesthetics of the curtain machine more attractive. The sheath 5 and the first track 11 can be fixed by screws or other detachable connection methods. In addition, the sheath 5 can be used to fix the base plate 431 of the transfer component 43, so that the transfer component 43 and the first track 11 remain relatively fixed. For example, a limiting groove (not shown) for embedding the base plate 431 can be provided in the sheath 5.

[0067] In some embodiments, such as Figure 10 As shown, the fixing component 3 can be a screw, for example, by using a screw to penetrate the second track 21 from the inside out and abut against the first track 11 to achieve relative fixation between the first track 11 and the second track 21. In other embodiments, other fixing methods can also be used between the first track 11 and the second track 21.

[0068] In some embodiments, such as 2 and Figure 6 As shown, the first drive assembly 13 includes a first motor 131, a first drive wheel 132, a first driven wheel 133, and a first transmission belt (not shown). The first drive wheel 132 and the first driven wheel 133 are respectively disposed at both ends of the first track 11. The first transmission belt is wound around the first drive wheel 132 and the first driven wheel 133. The first motor 131 is used to drive the first drive wheel 132 to rotate.

[0069] like Figure 2 and Figure 7As shown, the second drive assembly 23 includes a second motor 231, a second drive wheel 232, a second driven wheel 233, and a second transmission belt (not shown); the second drive wheel 232 and the second driven wheel 233 are respectively disposed at both ends of the second track 21, the second transmission belt is wound around the second drive wheel 232 and the second driven wheel 233, and the second motor 231 is used to drive the second drive wheel 232 to rotate.

[0070] Specifically, the first drive belt is connected to one of the first moving parts 12, and when the first drive belt moves, it can drive the first moving part 12 to move; the working principle of the second drive assembly 23 is the same. In this embodiment, the structure and working principle of the first drive assembly 13 and the second drive assembly 23 are the same as those of a conventional non-retractable curtain machine.

[0071] Specifically, in this embodiment, the first track 11 and the second track 21 are coaxially connected. Compared to the structure in the prior art CN217659186U where the two tracks are staggered left and right, the curtain machine in this embodiment has a stronger overall integrity and a higher aesthetic appeal. Furthermore, combined with... Figure 4 The first opening 1111 allows the first moving part 12 to slide out, and the second opening 2111 allows the second moving part 22 to slide out. The first opening 1111 and the second opening 2111 overlap in the horizontal direction, so that the moving space required by the first moving part 12 and the second moving part 22 is integrated. Compared with the structure of the two tracks being staggered left and right in the prior art CN217659186U, the width of the curtain machine in this embodiment is smaller.

[0072] The first transmission guide rail 112 provides transmission space for the first drive assembly 13, specifically providing isolation protection for the first transmission belt to ensure stable movement of the first transmission belt; the second transmission guide rail 212 is similar. In this embodiment, the first transmission guide rail 112 and the second transmission guide rail 212 are spaced apart on the left and right, and the first moving part 12 / second moving part 22 moves between the first transmission guide rail 112 and the second transmission guide rail 212. That is to say, the curtain corresponds to the central position in the width direction of the curtain machine, resulting in higher structural balance and aesthetics.

[0073] Specifically, the above scheme is as follows: Figure 12 As shown, a clearance is formed between the first outer frame 111 and the first transmission guide rail 112 for the second outer frame 211 to be inserted.

[0074] In some embodiments, the first outer frame and the first transmission guide rail are an integral structure.

[0075] Specifically, the first outer frame 111 has a connecting plate 1112 extending upward from the first edge of its first opening 1111, and the first transmission guide rail 112 is integrally connected to the connecting plate 1112.

[0076] In some embodiments, to improve the sliding structure stability of the first track 11 and the second track 21, such as... Figure 11-13 As shown, the first outer frame 111 has a first baffle 1113 extending upward from the second edge of its second opening 2111. The first baffle 1113 and the side wall of the first outer frame 111 together form a left and right limit for the second transmission guide rail 212. The second outer frame 211 has a second baffle 2112 extending downward from its inner top surface. The second baffle 2112 and the side wall of the second outer frame 211 together form a left and right limit for the first transmission guide rail 112.

[0077] In this way, the integrity of the first transmission guide rail 112, the second transmission guide rail 212, the first outer frame 111 and the second outer frame 211 can be strengthened, and the resistance to vibration caused by the first drive assembly 13 and the second drive assembly 23 can be strengthened.

[0078] In some embodiments, for ease of setting the first conductive member 41 and the second conductive member 42, such as Figure 12 and Figure 13 As shown, the top of the first outer frame 111 is provided with a first wiring groove 1114 for setting the first conductive member 41, and the top of the second outer frame 211 is provided with a second wiring groove 2113 for setting the second conductive member 42.

[0079] In some embodiments, such as Figure 12 and Figure 13 As shown, the first driving wheel 132 and the first driven wheel 133 are respectively disposed at both ends of the first transmission guide rail 112, the first transmission belt is disposed inside the first transmission guide rail 112, and a first side opening 1121 is provided on one side of the first transmission guide rail 112; the second driving wheel 232 and the second driven wheel 233 are respectively disposed at both ends of the second transmission guide rail 212, the second transmission belt is disposed inside the second transmission guide rail 212, and a second side opening 2121 is provided on one side of the second transmission guide rail 212.

[0080] Wherein, after the first transmission belt is set in the first transmission guide rail 112, the first side opening 1121 can provide space for the first moving member 12 to connect with the first transmission belt; the second side opening 2121 has the same function.

[0081] In some embodiments, such as Figure 3As shown, the first track 11 has a first transmission box 14 at the end away from the second track 21, the first drive wheel 132 and the first motor 131 are mounted on the first transmission box 14, the first transmission guide rail 112 has a first mounting shell 15 at the end near the second track 21, and the first driven wheel 133 is rotatably mounted on the first mounting shell 15; the second track 21 has a second transmission box 24 at the end away from the first track 11, the second drive wheel 232 and the second motor 231 are mounted on the second transmission box 24, the second transmission guide rail 212 has a second mounting shell 25 at the end near the first track 11, and the second driven wheel 233 is rotatably mounted on the second mounting shell 25; the first transmission box 14 and / or the second transmission box 24 are provided with power supply interfaces (not shown).

[0082] The first transmission box 14 covers one end of the first track 11, and the axial projection of the first mounting shell 15 does not exceed the range of the first transmission guide rail 112, so as to avoid the first mounting shell 15 affecting the installation of the second track 21 onto the first track 11; the same applies to the second mounting shell 25.

[0083] In some embodiments, the first outer frame 111 and the first transmission guide rail 112 are separate structures; the inventors have found that designing the first outer frame 111 and the first transmission guide rail 112 as separate structures and manufacturing them separately can reduce manufacturing difficulty.

[0084] Specifically, such as Figure 14 and Figure 15 As shown, the first outer frame 111 is slidably connected to the first transmission guide rail 112. A connecting plate 1112 extends upward from the first edge of the first opening 1111 of the first outer frame 111, and the first transmission guide rail 112 is slidably connected to the connecting plate 1112. The side of the connecting plate 1112 is provided with a groove 11121, and the first transmission guide rail 112 is provided with an insert plate 1122 for inserting into the groove 11121. The groove wall of the groove 11121 is provided with an upwardly protruding retaining strip 11122, and the bottom of the insert plate 1122 is provided with a retaining groove 11221 for inserting the retaining strip 11122. The retaining strip 11122 supports and limits the insert plate 1122, making the first transmission guide rail 112 more stable and maintaining a stable clearance 113 for the second outer frame to be inserted.

[0085] In summary, this application provides a track structure for a telescopic curtain machine. This track structure enables telescopic cooperation between two tracks, each with its own drive assembly. The configured first and second drive rails provide a safe and stable transmission space for the two sets of drive assemblies without affecting the sliding cooperation between the first and second outer frames. The overall structure is stable and has strong resistance to vibrations caused by the two sets of drive assemblies (compared to the single drive assembly in the prior art, the vibrations caused by the two sets of drive assemblies are stronger, requiring higher structural strength from the track).

[0086] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0087] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A track structure for a telescopic curtain machine, characterized in that, include: First and second tracks; The first track includes a hollow first outer frame, a first opening at the bottom of the first outer frame, a first transmission guide rail inside the first outer frame, and the vertical projection positions of the first transmission guide rail and the first opening are offset. The second track includes a hollow second outer frame, a second opening at the bottom of the second outer frame, and a second transmission guide rail inside the second outer frame. The vertical projection positions of the second transmission guide rail and the second opening are offset. The second outer frame is slidably sleeved inside the first outer frame, the first transmission guide rail is located inside the second outer frame and is spaced apart from the second transmission guide rail, and the first opening and the second opening at least partially overlap in the length direction.

2. The track structure for a telescopic curtain machine according to claim 1, characterized in that: A clearance is formed between the first outer frame and the first transmission guide rail to allow the second outer frame to be inserted.

3. The track structure for a telescopic curtain machine according to claim 2, characterized in that: The first outer frame and the first transmission guide rail are an integral structure.

4. The track structure for a telescopic curtain machine according to claim 2, characterized in that: The first outer frame and the first transmission guide rail are separate structures.

5. The track structure for a telescopic curtain machine according to claim 4, characterized in that: The first outer frame is slidably connected to the first transmission guide rail.

6. The track structure for a telescopic curtain machine according to claim 3, characterized in that: The first outer frame has a connecting plate extending upward from the first edge of its first opening, and the first transmission guide rail is integrally connected to the connecting plate.

7. The track structure for a telescopic curtain machine according to claim 5, characterized in that: The first outer frame has a connecting plate extending upward from the first edge of its first opening, and the first transmission guide rail is slidably connected to the connecting plate. The connecting plate has a groove on its side, and the first transmission guide rail has an insert plate for inserting into the groove. The groove wall has an upwardly protruding retaining strip, and the bottom of the insert plate has a retaining groove for inserting the retaining strip.

8. The track structure for a telescopic curtain machine according to claim 6 or 7, characterized in that: The first outer frame has a first baffle extending upward from the second edge of its second opening. The first baffle and the side wall of the first outer frame together limit the left and right movement of the second transmission guide rail. A second baffle extends downward from the inner top surface of the second outer frame, and the second baffle and the side wall of the second outer frame together limit the left and right movement of the first transmission guide rail.

9. The track structure for a telescopic curtain machine according to claim 1, characterized in that: The first transmission guide rail has a first side opening on one side; The second transmission guide rail has a second side opening on one side.

10. The track structure for a telescopic curtain machine according to claim 1, characterized in that: The top of the first outer frame is provided with a first wiring groove; The top of the second outer frame is provided with a second wiring groove.

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