Retractable curtain track system

Abstract

The present application provides a telescopic curtain track system, which includes a first curtain track, on which a first fixed groove is provided, and a first drive transmission box and a secondary transmission box are provided at both ends. A first drive gear is rotatably provided in the first drive transmission box, and a steering wheel is provided in the secondary transmission box. A drive belt installation groove is provided on the front side wall of the first curtain track; a second curtain track, which is arranged side by side with the first curtain track and has an overlapping part, on which a second fixed groove is provided, and a second drive transmission box and a track-changing transmission box are provided at both ends. A second drive gear is rotatably provided in the second drive transmission box, and a transmission group is provided in the track-changing transmission box; a drive belt, which is installed in the drive belt installation groove and at least partially exposes from the drive belt installation groove; a fixing component, which includes a double-track fixing piece; a limiting and shielding piece, which is provided at the non-overlapping part of the drive belt installation groove between the track-changing transmission box and the first drive transmission box, and its two ends respectively abut against the track-changing transmission box and the first drive transmission box. The present application is practical and convenient.

Description

Technical Field

[0002] This application relates to the technical field of curtain tracks, and particularly to a telescopic curtain track system.

Background Art

[0004] With the progress of technology, smart homes have gradually become popular. The automatic retraction and pulling of curtains is one of them, which is generally achieved by a curtain machine. Currently, the production and installation methods of curtain machines are generally as follows: First, measure the width of the window wall, and then manufacture the curtain machine according to the width dimension. However, the defects in this process are: 1. It is necessary to measure on-site, wasting manpower. If the measurement or manufacture is incorrect, rework is required, wasting working hours and materials; 2. It can only be customized, with high costs and cannot be mass-produced; 3. When installing, it is directly fixed to the wall through screws or bolts passing through the track, and it is necessary to open connection holes on the track wall or add fixing mechanisms at both ends of the track for fixing. The installation is difficult and the stability is not high. For a few curtain tracks with telescopic functions, a part of the transmission belt will be exposed in the non-overlapping part of the two tracks. After adjusting the track length of the two tracks, the transmission belt will become loose and fall out of the curtain track, affecting normal use and reducing the service life of the transmission belt.

Summary of the Invention

[0006] The purpose of this application is to provide a telescopic curtain track system, which can realize the automatic telescopic adjustment of the curtain track according to actual needs, is convenient for installation, and can protect the transmission belt during use.

[0007] This application is achieved through the following technical solutions:

[0008] A telescopic curtain track system includes:

[0009] A first curtain track, on which a first fixing groove with an upward opening is provided. First drive boxes and auxiliary transmission boxes are respectively connected to both ends of the first curtain track. A first drive gear is rotatably provided in the first drive box, a steering wheel is provided in the auxiliary transmission box, and a transmission belt installation groove is provided on the front side wall of the first curtain track;

[0010] A second curtain track, which is arranged side by side with the first curtain track and has an overlapping part. A second fixing groove with an upward opening is provided on it. Second drive boxes and variable track transmission boxes are respectively connected to both ends. A second drive gear is rotatably provided in the second drive box, and a transmission group is provided in the variable track transmission box. The first curtain track and the second curtain track can move relative to each other along the length direction to adjust the length of the overlapping part between them;

[0011] A transmission belt, which is used to realize the power transmission between the first drive wheel, the steering wheel, the second drive wheel and the transmission group, and at least part of it is exposed from the transmission belt installation groove;

[0012] A driving device, detachably disposed on the first driving box or the second driving box, for driving the first driving gear or the second driving gear to rotate;

[0013] A fixing assembly, including a double-rail fixing member, on which a double-rail hook group is provided that can be engaged with the first fixing groove at the overlapping part and the second fixing groove at the overlapping part at the same time;

[0014] A limit shielding member, disposed at the non-overlapping part of the transmission belt installation groove between the track-changing transmission box and the first driving box, for covering and shielding the exposed part of the transmission belt, and its two ends respectively abut against the track-changing transmission box and the first driving box, for restricting the track-changing transmission box from moving closer to the first driving box.

[0015] For the telescopic curtain track system as described above, a clamping structure for fixing the limit shielding member is further provided between the limit shielding member and the first curtain track. The clamping structure includes clamping portions protruding from the two long sides of the limit shielding member. The first curtain track is provided with a first clamping groove and a second clamping groove that can be respectively engaged with the two clamping portions. The first clamping groove is opened on the side wall of the first curtain track close to the second curtain track, and the second clamping groove is opened on the lower side wall of the first curtain track.

[0016] For the telescopic curtain track system as described above, the ratio of the width h of the transmission belt installation groove to the width H of the side wall of the first curtain track is between 1:2 and 1:3.

[0017] For the telescopic curtain track system as described above, the limit shielding member is a plastic limit shielding member, and the outer side surface of the limit shielding member is aligned with the side surface of the first curtain track.

[0018] For the telescopic curtain track system as described above, the double-rail hook group includes a first outer rail hook and a second outer rail hook extending in opposite directions. Between the first outer rail hook and the second outer rail hook, a first inner rail hook and a second inner rail hook extending in opposite directions are provided. The first outer rail hook and the first inner rail hook, and the second outer rail hook and the second inner rail hook are respectively used to cooperate and engage in the first fixing groove or the second fixing groove. An outer rail bending portion that can facilitate its rotation and engagement into the first fixing groove and the second fixing groove is respectively provided at the upper left corner of the first outer rail hook and the lower right corner of the second outer rail hook; an inner rail bending portion that can facilitate its rotation and engagement into the first fixing groove and the second fixing groove is respectively provided at the lower right corner of the first inner rail hook and the upper left corner of the second inner rail hook.

[0019] The telescopic curtain track system as described above, the first outer rail hook, the first inner rail hook, the second inner rail hook and the second outer rail hook are arranged staggeredly along the length direction of the double-rail fixing member. The first outer rail hook and the second outer rail hook are located in the same vertical plane. The first inner rail hook is arranged in front of the first outer rail hook and the second outer rail hook, and the second inner rail hook is arranged behind the first outer rail hook and the second outer rail hook.

[0020] The telescopic curtain track system as described above, the double-rail fixing member is an integrally formed structure with both ends protruding obliquely upward and the middle part recessed downward in the length direction. The first outer rail hook, the first inner rail hook, the second inner rail hook and the second outer rail hook are all formed by stamping downward from the middle part of the double-rail fixing member.

[0021] The telescopic curtain track system as described above, the fixing assembly further includes a single-rail fixing member. The single-rail fixing member is provided with a single-rail hook group that can be engaged with the first fixing groove at the non-coincident part or the second fixing groove at the non-coincident part. The single-rail hook group includes a first single-rail hook and a second single-rail hook extending in opposite directions. The first single-rail hook and the second single-rail hook are used to cooperate and engage in the first fixing groove or the second fixing groove. The upper left corner of the first single-rail hook and the lower right corner of the second single-rail hook are respectively provided with single-rail bending parts that can facilitate their rotation and engagement into the first fixing groove or the second fixing groove.

[0022] The telescopic curtain track system as described above, the auxiliary transmission box is slidably connected to the second curtain track, the track-changing transmission box is slidably connected to the first curtain track. The transmission group includes a first track-changing component and a second track-changing component arranged in the track-changing transmission box. The transmission belt is wound around the first driving wheel, the steering wheel, the first track-changing component, the second driving wheel, the second track-changing component and the first driving wheel in sequence.

[0023] The telescopic curtain track system as described above, the transmission group includes a first auxiliary transmission wheel and a second auxiliary transmission wheel arranged in the track-changing transmission box, and a transmission gear arranged between the two and respectively drivingly connected to the two. There are two transmission belts. One is movably arranged in the second curtain track and wound around the second driving transmission wheel and the first auxiliary transmission wheel. The other is movably arranged in the first curtain track and the accommodation groove and wound around the first driving transmission wheel, the second auxiliary transmission wheel and the steering wheel. The two transmission belts are drivingly connected through the transmission gear.

[0024] Compared with the prior art, the present application has the following advantages: The structure of the present application is simple. By adjusting the mutual movement between the second curtain track and the first curtain track, the length of the overlapping part between the second curtain track and the first curtain track is changed, realizing the automatic telescopic adjustment of the curtain track, which is convenient and practical. At the same time, after the adjustment, the limit shielding member is embedded into the non-overlapping part of the belt installation groove between the track-changing transmission box and the first drive box to cover and shield the exposed part of the transmission belt, preventing the exposed part of the transmission belt from falling outside the telescopic curtain track and ensuring the normal use of the telescopic curtain track. Moreover, since the limit shielding member is cut according to the adjusted length, after being embedded into the belt installation groove, its two ends respectively press against the first drive transmission box and the track-changing transmission box, and can also play a limiting role to prevent the first curtain track and the second curtain track from continuing to move towards each other and shortening the length of the telescopic curtain track; during installation, it is clamped and fixed on the first fixing groove at the overlapping part and the second fixing groove at the overlapping part through the double-track fixing member, and then the double-track fixing member is fixed on the wall to fix the curtain track on the wall, without the need to open connection holes on the track wall or add fixing mechanisms at both ends of the track for fixing, which is convenient for installation and has high stability.

BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] FIG. 1 is a schematic structural diagram of the telescopic curtain track system according to Embodiment 1 of the present application.

[0028] FIG. 2 is an exploded structural diagram of the telescopic curtain track system according to Embodiment 1 of the present application.

[0029] FIG. 3 is a bottom view of the telescopic curtain track system according to Embodiment 1 of the present application.

[0030] FIG. 4 is a cross-sectional schematic view in the direction of A in FIG. 3.

[0031] FIG. 5 is a cross-sectional schematic view in the direction of B in FIG. 3.

[0032] FIG. 6 is a side view of the telescopic curtain track system according to Embodiment 1 of the present application.

[0033] FIG. 7 is a cross-sectional schematic view in the direction of C in FIG. 6.

[0034] FIG. 8 is a cross-sectional view of the telescopic curtain track system according to Embodiment 2 of the present application.

[0035] FIG. 9 is a schematic structural view of the double-rail fixture described in Embodiment 1 of the present application.

[0036] FIG. 10 is a schematic structural view of the single-rail fixture described in Embodiment 1 of the present application.

[0037] FIG. 11 is a schematic structural view of the limit shielding member described in Embodiment 1 of the present application.

[0038] FIG. 12 is a schematic structural view of the curtain hanging member described in Embodiment 1 of the present application.

[0039] FIG. 13 is a schematic cross-sectional view in the D direction of FIG. 1.

Specific Embodiments

[0041] In order to make the technical problems, technical solutions and beneficial effects solved by the present application more clear and understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0042] As shown in FIGS. 1-7 and FIGS. 9-13, the telescopic curtain rail system proposed in Embodiment 1 of the present application includes: a first curtain rail 1, on which a first fixing groove 102 with an upward opening is provided. At both ends of the first curtain rail 1, a first drive box 11 and a secondary transmission box 12 are respectively connected. A first drive gear 111 is rotatably provided in the first drive box 11. A steering wheel 121 is provided in the secondary transmission box 12. A drive belt installation groove 14 is provided on the front side wall of the first curtain rail 1.

[0043] A second curtain rail 2, which is arranged side by side with the first curtain rail 1 and has an overlapping part. A second fixing groove 202 with an upward opening is provided thereon. At both ends, a second drive box 21 and a track-changing transmission box 22 are respectively connected. A second drive gear 211 is rotatably provided in the second drive box 21. A transmission group 221 is provided in the track-changing transmission box 22. The first curtain rail 1 and the second curtain rail 2 can move relative to each other along the length direction to adjust the length of the overlapping part therebetween.

[0044] A drive belt 3 is used to realize the power transmission between the first drive wheel 111, the steering wheel 121, the second drive wheel 211 and the transmission group 221, and at least part of it is exposed from the drive belt installation groove 14.

[0045] A drive device 4 is detachably provided on the first drive box 11 or the second drive box 21 and is used to drive the first drive gear 111 or the second drive gear 211 to rotate.

[0046] A fixing component, including a double-rail fixing member 61, and a double-rail hook group 64 capable of engaging with the first fixing groove 102 at the overlapping part and the second fixing groove 202 at the overlapping part is provided on the double-rail fixing member 61.

[0047] A limit and shielding member 9 is arranged at the non-overlapping part of the transmission belt installation groove 14 between the track-changing transmission box 22 and the first driving box 11, used for covering and shielding the exposed part of the transmission belt 3, and both ends thereof respectively abut against the track-changing transmission box 22 and the first driving box 11, used for restricting the track-changing transmission box 22 from moving closer in the direction of the first driving box 11.

[0048] By respectively adjusting and moving between the second curtain track 2 and the first curtain track 1, the length of the overlapping part between the second curtain track and the first curtain track is changed, realizing the automatic telescopic adjustment of the curtain track, which is convenient and practical. At the same time, after the adjustment, the limit and shielding member 9 is embedded in the non-overlapping part of the transmission belt installation slot 14 between the track-changing transmission box 22 and the first driving box 11 to cover and shield the exposed part of the transmission belt 3, preventing the exposed part of the transmission belt 3 from falling outside the telescopic curtain track, ensuring the normal use of the telescopic curtain track. And because the limit and shielding member 9 is cut according to the adjusted length, after being embedded in the transmission belt installation groove 14, both ends thereof respectively abut against the first driving transmission box 11 and the track-changing transmission box 22, and can also play a limiting role, preventing the first curtain track 1 and the second curtain track 2 from continuing to move towards each other and shortening the length of the telescopic curtain track; during installation, it is clamped and fixed on the first fixing groove 102 at the overlapping part and the second fixing groove 202 at the overlapping part through the double-rail fixing member 61, and then the double-rail fixing member 61 is fixed on the wall to fix the curtain track on the wall, without the need to open connection holes on the track wall or add fixing mechanisms at both ends of the track for fixing, which is convenient for installation and has high stability.

[0049] In this embodiment, the auxiliary transmission box 12 is slidably connected to the second curtain track 2, and the track-changing transmission box 22 is slidably connected to the first curtain track 1.

[0050] Specifically, the transmission group 221 includes a first track-changing component 2211 and a second track-changing component 2212 arranged in the track-changing transmission box 22, and the transmission belt 3 is wound around the first driving wheel 111, the steering wheel 121, the first track-changing component 2211, the second driving wheel 211, the second track-changing component 2212, and the first driving wheel 111 in sequence.

[0051] Specifically, the limit and shielding member 9 is installed on the accommodation groove 14, and its outer side surface is aligned with the side surface of the first curtain track 1 close to the second curtain track 2. This prevents the limit and shielding member 9 from protruding outside the side surface of the first curtain track 1, protecting the limit and shielding member 9 and making the telescopic curtain track more aesthetically pleasing.

[0052] Furthermore, a clamping structure 90 for fixing the limit and shielding member 9 is provided between the limit and shielding member 9 and the first curtain track 1.

[0053] Specifically, the clamping structure 90 includes clamping portions 901 protruding from the two long sides of the limit and shielding member 9, and first clamping grooves 902 and second clamping grooves 903 are formed on the first curtain track 1 that can be respectively clamped with the two clamping portions 901.

[0054] In this embodiment, the first clamping groove 902 is formed on the side wall of the first curtain track 1 close to the second curtain track 2, and the second clamping groove 903 is formed on the lower side wall of the first curtain track 1. By forming the second clamping groove 903 on the lower side wall of the first curtain track 1, one side of the limit and shielding member 9 is located outside the first curtain track 1 after installation, facilitating the removal of the limit and shielding member 9 from the first curtain track 1.

[0055] Specifically, both ends of the limit and shielding member 9 are respectively abutted against the track-changing transmission box 22 and the first drive box 11, and it can also play a limiting role to prevent the first curtain track 1 and the second curtain track 2 from moving towards each other continuously and shortening the length of the telescopic curtain track.

[0056] Specifically, the ratio of the width h of the transmission belt installation groove 14 to the width H of the side wall of the first curtain track 1 is between 1:2 and 1:3.

[0057] Specifically, the limit and shielding member 9 is a plastic limit and shielding member. It has a low cost and is convenient for production.

[0058] Furthermore, a first pulley groove 101 with an opening facing downwards and a first fixing groove 102 with an opening facing upwards are respectively formed on the first curtain track 1. The first pulley group 13 is slidably arranged in the first pulley groove 101. A second pulley groove 201 with an opening facing downwards and a second fixing groove 202 with an opening facing upwards are respectively formed on the second curtain track 2. The second pulley group 23 is slidably arranged in the second pulley groove 201. The transmission belt 3 is movably arranged in the first pulley groove 101 and the second pulley groove 201.

[0059] Furthermore, mounting parts 40 for mounting the driving device 4 are respectively provided on the first driving box 11 and the second driving box 21, and the output ends of the driving device 4 are respectively connected to the first driving gear 111 or the second driving gear 211. By mounting the driving device 4 on the corresponding mounting part 40 and then starting it to drive the first driving gear 111 or the second driving gear 211 to rotate, the transmission belt 3 is driven to rotate so as to drive the first pulley block 13 and the second pulley block 23 to move.

[0060] Furthermore, the driving device 4 includes a motor assembly 41 and a motor mounting member 42 clamped to the motor assembly 41. The motor mounting member 42 is detachably connected to the mounting part 40. A driving rod 43 that can be embedded in the first driving gear 111 or the second driving gear 211 is rotatably provided on the motor mounting member 42, and the output end of the motor assembly 41 is connected to the driving rod 43. The motor assembly 41 and the motor mounting member 42 are fixed by clamping, with a simple structure, convenient and practical. The motor assembly 41, the motor mounting member 42, the first driving box 11, and the second driving box 21 can all be separately disassembled and replaced, which is convenient and practical and saves the use cost.

[0061] In this embodiment, a plurality of mounting slots 421 are further formed on the motor mounting member 42, mounting buckles 411 that can cooperate and be clamped with the corresponding mounting slots 421 are further provided on the motor assembly 41, a plurality of positioning slots 422 are further formed on the motor mounting member 42, and positioning protrusions 412 that can be embedded in the corresponding positioning slots 422 for positioning are further provided on the motor assembly 41.

[0062] Further, a locking mechanism 5 is also provided between the auxiliary transmission case 12 and the first fixing groove 102, and between the track-changing transmission case 22 and the second fixing groove 202. The locking mechanism 5 includes locking ridges 51 provided on the first fixing groove 102 and the second fixing groove 202, and a rotating locking member 52 hinged on the auxiliary transmission case 12 and the track-changing transmission case 22 and capable of rotating and pressing against the locking ridges 51 to jack up the auxiliary transmission case 12 and the track-changing transmission case 22. When the position adjustment between the first curtain track 1 and the second curtain track 2 is in place, the locking member 52 can be flipped to press against the locking ridges 51, jacking up the auxiliary transmission case 12 and the track-changing transmission case 22, so that the two cannot slide, thereby locking the relative position between the first curtain track 1 and the second curtain track 2, which is convenient and practical. At the same time, during transportation, after the total length of the curtain track is adjusted to the shortest, it can be locked by the locking mechanism 5, saving transportation space and preventing relative sliding between the first curtain track 1 and the second curtain track 2 during transportation, protecting the product.

[0063] Further, the double-rail hook group 64 includes a first outer rail hook 641 and a second outer rail hook 642 extending in opposite directions. Between the first outer rail hook 641 and the second outer rail hook 642, there are a first inner rail hook 643 and a second inner rail hook 644 extending in opposite directions. The first outer rail hook 641 and the first inner rail hook 643, and the second outer rail hook 642 and the second inner rail hook 644 are respectively used to cooperate and engage in the first fixing groove 102 or the second fixing groove 202. Outer rail bending portions 645 are respectively provided at the upper left corner of the first outer rail hook 641 and the lower right corner of the second outer rail hook 642 to facilitate their rotation and engagement into the first fixing groove 102 and the second fixing groove 202. Inner rail bending portions 646 are respectively provided at the lower right corner of the first inner rail hook 643 and the upper left corner of the second inner rail hook 644 to facilitate their rotation and engagement into the first fixing groove 102 and the second fixing groove 202.

[0064] Specifically, the first outer rail hook 641, the first inner rail hook 643, the second inner rail hook 644 and the second outer rail hook 642 are arranged staggered along the length direction of the double-rail fixing member 61. The first outer rail hook 641 and the second outer rail hook 642 are located in the same vertical plane. The first inner rail hook 643 is provided in front of the first outer rail hook 641 and the second outer rail hook 642, and the second inner rail hook 644 is provided behind the first outer rail hook 641 and the second outer rail hook 642.

[0065] More specifically, the double-rail fixing member 61 has an integrally formed structure with both ends in the length direction protruding obliquely upward and the middle part recessed downward. The first outer-rail hook 641, the first inner-rail hook 643, the second inner-rail hook 644, and the second outer-rail hook 642 are all formed by stamping downward from the middle part of the double-rail fixing member 61.

[0066] Furthermore, the fixing assembly further includes a single-rail fixing member 62. The single-rail fixing member 62 is provided with a single-rail hook group 63 that can be engaged with the first fixing groove 102 at the non-coincident part or the second fixing groove 202 at the non-coincident part. The single-rail hook group 63 includes a first single-rail hook 631 and a second single-rail hook 632 extending in opposite directions. The first single-rail hook 631 and the second single-rail hook 632 are used to cooperate and engage in the first fixing groove 102 or the second fixing groove 202. Single-rail bending parts 633 are respectively provided at the upper left corner of the first single-rail hook 631 and the lower right corner of the second single-rail hook 632 to facilitate their rotational engagement into the first fixing groove 102 or the second fixing groove 202.

[0067] More specifically, the double-rail fixing member 61 and the single-rail fixing member 62 are respectively provided with a plurality of connecting holes 65 and a plurality of locking screw holes 66.

[0068] During installation, a plurality of single-rail fixing members 62 are respectively placed obliquely at 45° into the first fixing groove 102 of the single-extending part of the first curtain rail 1 and the second fixing groove 202 of the single-extending part of the second curtain rail 2, and then the single-rail fixing member 62 is rotated to make the single-rail hook group 63 engaged with the first fixing groove 102 or the second fixing groove 202; a plurality of double-rail fixing members 61 are placed obliquely at 45° on the first fixing groove 102 and the second fixing groove 202 of the overlapping part of the first curtain rail 1 and the second curtain rail 2, and then the double-rail fixing member 61 is rotated to make the double-rail hook group 64 engaged with the first fixing groove 102 or the second fixing groove 202; then, a fixing screw is screwed into the locking screw hole 66 until the bottom of the fixing screw presses against the locking rib 51, so that the single-rail hook group 63 and the double-rail hook group 64 respectively press against the first fixing groove 102 and / or the second fixing groove 202 to achieve fixation. Finally, the double-rail fixing member 61 and the single-rail fixing member 62 are fixed to the wall by passing a fixing screw or bolt through the connecting hole 65. The operation is simple, convenient and practical.

[0069] Further, the first pulley block 13 includes a first pulley 131 slidably disposed in the first pulley groove 101. First fixing structures 132 and second fixing structures 133 are respectively provided at both ends of the first pulley 131. Both ends of the transmission belt 3 are respectively connected to the first fixing structure 132 and the second fixing structure 133. The second pulley block 23 includes a second pulley 231 slidably disposed in the second pulley groove 201. The transmission belt 3 passes through the second pulley 231. A second limiting member 232 capable of locking the relative position between the second pulley 231 and the transmission belt 3 is further provided on the second pulley 231. Limiting protrusions 8 are respectively provided on one side of the first pulley 131 and the second pulley 231 that face each other. The second limiting member 232 and the second pulley 231 are fixed by screws. By tightening or loosening the screws, the transmission belt 3 is fixed or loosened with respect to the second limiting member 232 and the second pulley 231.

[0070] Specifically, curtain hanging members 71 for hanging curtains are respectively slidably inserted between the first driving box 11 and the first pulley 131 in the first pulley groove 101 and between the second driving box 21 and the second pulley 231 in the second pulley groove 201. First hooks 72 for hanging curtains are respectively provided on the first driving box 11 and the second driving box 21. Second hooks 73 for hanging curtains are respectively provided on the first pulley 131 and the second pulley 231. An arc-shaped mounting portion 711 that can be conveniently inserted into the first pulley groove 101 or the second pulley groove 201 is further provided at the upper end of the curtain hanging member 71. During installation, first insert one end of the arc-shaped mounting portion 711 of the curtain hanging member 71 into the first pulley groove 101 or the second pulley groove 201, and then rotate the curtain hanging member 71 to insert the other end of the arc-shaped mounting portion 711, which is time-saving and labor-saving, and the installation is convenient and fast. The two ends of the upper part of the curtain are respectively hung on the first hook 72 and the second hook 73, and the middle part is hung on the curtain hanging member 71.

[0071] By connecting and fixing between the second pulley 231 and the second limiting member 232, the position between the second pulley block 23 and the transmission belt 3 is locked, so that the first pulley block 13 and the second pulley 23 move relatively along with the transmission belt 3, thereby driving the curtains hung between the first driving box 11 and the first pulley 131 and between the second driving box 21 and the second pulley 231 to be retracted or unfolded, which is practical and convenient. And by providing the limiting protrusions 8, it is prevented that the first pulley 131 and the second pulley 231 slide excessively and form an intersection.

[0072] In Embodiment 2, this embodiment is basically the same as Embodiment 1. For the sake of simplicity of description, only the differences in its main structure from Embodiment 1 will be described. The parts not described in this embodiment are the same as those in Embodiment 1, and the differences are as follows:

[0073] As shown in FIG. 8, the transmission group 221 includes a

[0074] first secondary transmission wheel 2213 and a second secondary transmission wheel 2214 disposed in the track-changing transmission box 22, and a transmission gear 2215 disposed between the two and drivingly connected to the two respectively.

[0075] Specifically, there are two transmission belts 3. One is movably disposed in the second curtain track 2 and wound around the second driving transmission wheel 211 and the first secondary transmission wheel 2213, and the other is movably disposed in the first curtain track 1 and the accommodation groove 14 and wound around the first driving transmission wheel 111, the second secondary transmission wheel 2214 and the steering wheel 121. The two transmission belts 3 are drivingly connected through the transmission gear 2215.

[0076] It should be understood that in this application, terms such as "first" and "second" are used to describe various information, but this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, "first" information can also be called "second" information, and similarly, "second" information can also be called "first" information. In addition, the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0077] As described above, one or more implementation manners are provided in combination with specific contents, and it is not determined that the specific implementation of this application is only limited to these descriptions. Any approximation, similarity to the method, structure, etc. of this application, or several technical deductions or substitutions made under the premise of the concept of this application should be regarded as the protection scope of this application.

Claims

1. A telescopic curtain rail system, characterized in that, It includes: a first curtain rail (1) with a first fixing groove (102) having an upward opening. At both ends of the first curtain rail (1), a first driving box (11) and a secondary transmission box (12) are respectively connected. A first driving wheel (111) is rotatably provided in the first driving box (11), a steering wheel (121) is provided in the secondary transmission box (12), and a transmission belt installation groove (14) is formed on the front side wall of the first curtain rail (1). A second curtain rail (2) is arranged side by side with the first curtain rail (1) and has an overlapping part. A second fixing groove (202) with an upward opening is formed thereon. At both ends, a second driving box (21) and a track-changing transmission box (22) are respectively connected. A second driving wheel (211) is rotatably provided in the second driving box (21), and a transmission group (221) is provided in the track-changing transmission box (22). The first curtain rail (1) and the second curtain rail (2) can move relative to each other along the length direction to adjust the length of the overlapping part therebetween. A transmission belt (3) is used to realize the power transmission between the first driving wheel (111), the steering wheel (121), the second driving wheel (211) and the transmission group (221), and at least part of it is exposed from the transmission belt installation groove (14). A driving device (4) is detachably arranged on the first driving box (11) or the second driving box (21) and is used to drive the first driving wheel (111) or the second driving wheel (211) to rotate. A fixing component includes a double-rail fixing piece (61), and a double-rail hook group (64) that can be simultaneously engaged with the first fixing groove (102) of the overlapping part and the second fixing groove (202) of the overlapping part is provided on the double-rail fixing piece (61). A limiting and shielding member (9) is arranged at the non-overlapping part of the transmission belt installation groove (14) between the track-changing transmission box (22) and the first driving box (11) and is used to cover and shield the exposed part of the transmission belt (3). Both ends of it respectively abut against the track-changing transmission box (22) and the first driving box (11) to limit the track-changing transmission box (22) from moving closer to the first driving box (11). A clamping structure (90) for fixing the limiting and shielding member (9) is further provided between the limiting and shielding member (9) and the first curtain rail (1). The clamping structure (90) includes clamping portions (901) protruding from the two long sides of the limiting and shielding member (9). A first clamping groove (902) and a second clamping groove (903) that can be respectively engaged with the two clamping portions (901) are formed on the first curtain rail (1). The first clamping groove (902) is formed on the side wall of the first curtain rail (1) close to the second curtain rail (2), and the second clamping groove (903) is formed on the lower side wall of the first curtain rail (1). The double-rail hook group (64) includes a first outer-rail hook (641) and a second outer-rail hook (642) extending in opposite directions, and a first inner-rail hook (643) and a second inner-rail hook (644) extending in opposite directions are provided between the first outer-rail hook (641) and the second outer-rail hook (642); The first outer-rail hook (641), the first inner-rail hook (643), the second inner-rail hook (644) and the second outer-rail hook (642) are arranged in a staggered manner along the length direction of the double-rail fixing member (61).

2. The telescopic curtain track system according to claim 1, wherein, The ratio of the width h of the drive belt installation groove (14) to the width H of the side wall of the first curtain track (1) is between 1:2 and 1:

3.

3. The telescopic curtain track system according to claim 1, characterized in that, The limit shielding member (9) is a plastic limit shielding member, and the outer side surface of the limit shielding member (9) is aligned with the side surface of the first curtain track (1).

4. The telescopic curtain rail system according to any one of claims 1-3, characterized in that, The first outer-rail hook (641) and the first inner-rail hook (643), and the second outer-rail hook (642) and the second inner-rail hook (644) are respectively used to be fitted and engaged in the first fixing groove (102) or the second fixing groove (202). Outer-rail bending portions (645) that can facilitate their rotational engagement into the first fixing groove (102) and the second fixing groove (202) are respectively provided at the upper left corner of the first outer-rail hook (641) and the lower right corner of the second outer-rail hook (642); Inner-rail bending portions (646) that can facilitate their rotational engagement into the first fixing groove (102) and the second fixing groove (202) are respectively provided at the lower right corner of the first inner-rail hook (643) and the upper left corner of the second inner-rail hook (644).

5. The telescopic curtain track system according to claim 4, characterized in that, The first outer-rail hook (641) and the second outer-rail hook (642) are located in the same vertical plane. The first inner-rail hook (643) is provided in front of the first outer-rail hook (641) and the second outer-rail hook (642), and the second inner-rail hook (644) is provided behind the first outer-rail hook (641) and the second outer-rail hook (642).

6. The telescopic curtain rail system according to claim 5, wherein, The double-rail fixing member (61) is an integrally formed structure with both ends in the length direction protruding obliquely upward and the middle part concave downward. The first outer-rail hook (641), the first inner-rail hook (643), the second inner-rail hook (644) and the second outer-rail hook (642) are all formed by stamping downward from the middle part of the double-rail fixing member (61).

7. The telescopic curtain track system according to claim 6, characterized in that, The fixed component further includes a single-rail fixture (62). A single-rail hook group (63) capable of engaging with the first fixing groove (102) at the non-coincident part or the second fixing groove (202) at the non-coincident part is provided on the single-rail fixture (62). The single-rail hook group (63) includes a first single-rail hook (631) and a second single-rail hook (632) extending in opposite directions. The first single-rail hook (631) and the second single-rail hook (632) are used to cooperatively engage in the first fixing groove (102) or the second fixing groove (202). Single-rail bending parts (633) are respectively provided at the upper left corner of the first single-rail hook (631) and the lower right corner of the second single-rail hook (632), which can facilitate their rotational engagement into the first fixing groove (102) or the second fixing groove (202).

8. The telescopic curtain track system according to claim 7, characterized in that, The secondary transmission box (12) is slidably connected to the second curtain track (2), and the track-changing transmission box (22) is slidably connected to the first curtain track (1). The transmission group (221) includes a first track-changing component (2211) and a second track-changing component (2212) provided in the track-changing transmission box (22). The transmission belt (3) is sequentially wound around the first driving wheel (111), the steering wheel (121), the first track-changing component (2211), the second driving wheel (211), the second track-changing component (2212), and the first driving wheel (111).

9. The telescopic curtain track system according to claim 7, wherein, The transmission group (221) includes a first secondary transmission wheel (2213) and a second secondary transmission wheel (2214) provided in the track-changing transmission box (22), and a transmission gear (2215) provided between the two and in transmission connection with the two respectively. There are two transmission belts (3). One is movably provided in the second curtain track (2) and wound around the second driving wheel (211) and the first secondary transmission wheel (2213), and the other is movably provided in the first curtain track (1) and the accommodation groove and wound around the first driving wheel (111), the second secondary transmission wheel (2214), and the steering wheel (121). The two transmission belts (3) are in transmission connection through the transmission gear (2215).

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