curtain telescopic rails

Abstract

The present invention provides a telescopic curtain rail. The telescopic curtain rail comprises: an outer guide rail; an inner guide rail, one end of which extends into and is slidably connected to the outer guide rail; a first transmission assembly, disposed at an end of the outer guide rail remote from the inner guide rail; a second transmission assembly, disposed at an end of the inner guide rail remote from the outer guide rail; a locking roller assembly, at least one of which is adjustably positioned within the inner or outer guide rail, the locking roller assembly having a locked state and an unlocked state. When the locking roller assembly is in the locked state, the locking roller assembly is locked and fixed to the inner or outer guide rail; and a synchronous belt, which is wound between the first transmission assembly, the locking roller assembly, and the second transmission assembly so that the synchronous belt moves when the first and second transmission assemblies are activated. The present invention solves the problem of inconvenient use of curtain rails in the prior art.

Description

Technical Field

[0001] The present invention relates to the technical field of curtains, in particular to a curtain telescopic rail. Background Art

[0002] Most of the existing electric curtain tracks are straight tracks. Before installing the tracks, users need to measure in advance and provide measurement data for suppliers to customize the tracks. The customized tracks are not adjustable in length and need to be assembled again after the user receives the tracks. This operation is not only labor-intensive and time-consuming, but also greatly increases labor costs. There is also the risk of secondary processing due to inaccurate measurements.

[0003] As can be seen from the above, the existing technology has the problem that the curtain track is inconvenient to use. Summary of the Invention

[0004] The main purpose of the present invention is to provide a curtain telescopic rail to solve the problem that the curtain rail in the prior art is inconvenient to use.

[0005] In order to achieve the above-mentioned objectives, the present invention provides a curtain telescopic rail, comprising: an outer guide rail; an inner guide rail, one end of the inner guide rail extends into the outer guide rail and is slidably connected to the outer guide rail; a first transmission assembly, the first transmission assembly is arranged at the end of the outer guide rail away from the inner guide rail; a second transmission assembly, the second transmission assembly is arranged at the end of the inner guide rail away from the outer guide rail; a positioning roller assembly, there is at least one positioning roller assembly, and the position of at least one positioning roller assembly can be adjusted in the inner guide rail or the outer guide rail, the positioning roller assembly has a locked state and an unlocked state, and when the positioning roller assembly is in the locked state, the positioning roller assembly is locked and fixed to the inner guide rail or the outer guide rail; a synchronous belt, the synchronous belt is wound between the first transmission assembly, the positioning roller assembly and the second transmission assembly, so that the synchronous belt moves when the first transmission assembly and the second transmission assembly are actuated.

[0006] Furthermore, the positioning roller assembly includes: a slide; a first pulley, the first pulley is rotatably set on the slide, and the synchronous belt is wound around the first pulley; a locking accessory, the locking accessory is set on the slide and has a locked state and a unlocked state. When the locking accessory is in the locked state, the locking accessory locks the slide with the inner guide rail or the outer guide rail to switch the positioning roller assembly to the locked state.

[0007] Furthermore, the locking accessory is a columnar structure, the slide seat has a locking hole column, and at least a portion of the locking accessory passes through the locking hole column and is locked with the inner guide rail or the outer guide rail.

[0008] Furthermore, the locking accessory includes a locking screw, the locking hole column has a first threaded hole, one end of the locking screw extends from the first threaded hole and abuts against the inner surface of the inner guide rail or the inner surface of the outer guide rail to switch the locking accessory to a locked state.

[0009] Furthermore, the first threaded hole has a hollow section and a threaded section, and the locking screw is threadedly connected to the threaded section through the hollow section.

[0010] Furthermore, the positioning roller assembly also includes a gasket, which is arranged below the locking hole column and has a second threaded hole. The locking accessory includes a locking screw, which passes through the locking hole column and the second threaded hole in sequence and then abuts against the inner surface of the inner guide rail or the inner surface of the outer guide rail to switch the locking accessory to a locked state.

[0011] Furthermore, the slide seat is provided with an adjustable eccentric annular hole, and at least a portion of the first pulley is rotatably disposed in the adjustable eccentric annular hole.

[0012] Furthermore, the middle part of the slide has an accommodating recess, the first pulley is rotatably arranged in the accommodating recess, and the slide is located on both sides of the accommodating recess to form two locking hole columns, there are two locking accessories, and the two locking hole columns are arranged in a one-to-one correspondence with the two locking accessories.

[0013] Furthermore, the middle of the slide has an accommodating recess, the first pulley is rotatably arranged in the accommodating recess, and the positioning roller assembly also includes a cover plate, which at least covers the opening of the accommodating recess and is connected to the slide.

[0014] Furthermore, a shifting rib is provided in the sliding cavity of the inner guide rail and / or the sliding cavity of the outer guide rail, and the shifting rib extends along the extension direction of the curtain telescopic rail. The positioning roller assembly includes an abutment plate, and the abutment plate is provided on the slide seat. When the locking accessory is in a locked state, the abutment plate abuts against the shifting rib in the extension direction of the locking hole column. When the locking accessory is in a unlocked state, the locking accessory is released from the abutment with the inner guide rail and / or the outer guide rail, so that the abutment plate is released from the abutment with the shifting rib.

[0015] Furthermore, the first transmission assembly includes at least one second pulley, the second transmission assembly includes at least one third pulley, and the number of the second pulleys is not equal to the number of the third pulleys.

[0016] Furthermore, there is one second pulley, two third pulleys, and one positioning roller assembly. The synchronous belt is connected end to end and passes through the second pulley, a third pulley, the positioning roller assembly and another third pulley in sequence, so that the synchronous belt is concave in shape.

[0017] Furthermore, the position of the locking roller assembly is adjustably arranged on the inner guide rail.

[0018] Furthermore, the first transmission assembly includes a second pulley, the second transmission assembly includes a third pulley, there are two positioning roller assemblies, and the two positioning roller assemblies are respectively arranged on the inner guide rail and the outer guide rail, the synchronous belt is connected end to end and passes around the second pulley, the positioning roller assembly on the inner guide rail, the positioning roller assembly on the outer guide rail and the third pulley in sequence; or the two positioning roller assemblies are both arranged on the inner guide rail, the synchronous belt is connected end to end and passes around the second pulley, the positioning roller assembly away from the outer guide rail, the positioning roller assembly close to the outer guide rail and the third pulley in sequence.

[0019] Furthermore, the positioning roller assembly on the outer guide rail is fixedly arranged on the outer guide rail, and the positioning roller assembly on the inner guide rail is adjustably arranged on the inner guide rail; or the positioning roller assembly on the outer guide rail is adjustably arranged on the outer guide rail, and the positioning roller assembly on the inner guide rail is fixedly arranged on the inner guide rail; or the positioning roller assembly on the outer guide rail is adjustably arranged on the outer guide rail, and the positioning roller assembly on the inner guide rail is adjustably arranged on the inner guide rail; or both positioning roller assemblies on the inner guide rail are adjustably arranged on the inner guide rail; or one of the two positioning roller assemblies on the inner guide rail is adjustably arranged on the inner guide rail, and the other positioning roller assembly is fixedly arranged on the inner guide rail.

[0020] Applying the technical solution of the present invention, the curtain telescopic rail includes an outer guide rail, an inner guide rail, a first transmission assembly, a second transmission assembly, a locking roller assembly and a synchronous belt. One end of the inner guide rail extends into the outer guide rail and is slidably connected to the outer guide rail. The first transmission assembly is arranged at the end of the outer guide rail away from the inner guide rail, and the second transmission assembly is arranged at the end of the inner guide rail away from the outer guide rail. There is at least one locking roller assembly, and the position of at least one locking roller assembly can be adjusted in the inner guide rail or the outer guide rail. The locking roller assembly has a locked state and an unlocked state, and when the locking roller assembly is in the locked state When the curtain is moved, the locking roller assembly is locked and fixed to the inner guide rail or the outer guide rail, and the synchronous belt is wound between the first transmission assembly, the locking roller assembly and the second transmission assembly, so that when the first transmission assembly and the second transmission assembly are in operation, the synchronous belt moves. In this way, the length of the curtain telescopic rail is adjusted by adjusting the position between the inner guide rail and the outer guide rail, and the synchronous belt is adjusted to an appropriate tightness through the locking roller assembly to ensure the normal operation of the synchronous belt, so that the user can adjust the curtain telescopic rail quickly and conveniently according to actual needs, solving the problem of inconvenient use of curtain tracks in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which constitute part of this application, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0022] Figure 1An exploded view of the curtain telescopic rail in the first embodiment of the present invention is shown;

[0023] Figure 2 A schematic structural diagram of a curtain telescopic rail in a first embodiment of the present invention is shown;

[0024] Figure 3 An exploded view of the locking roller assembly in the first embodiment of the present invention is shown;

[0025] Figure 4 A cross-sectional view of the locking roller assembly in the first embodiment of the present invention is shown;

[0026] Figure 5 A schematic structural diagram of a curtain telescopic rail in a second embodiment of the present invention is shown;

[0027] Figure 6 An exploded view of the locking roller assembly in the third embodiment of the present invention is shown.

[0028] The above drawings include the following reference numerals:

[0029] 10. Outer guide rail; 20. Inner guide rail; 30. First transmission assembly; 31. Second pulley; 40. Second transmission assembly; 41. Third pulley; 50. Positioning roller assembly; 51. Slide seat; 511. Locking hole column; 52. First pulley; 53. Locking accessory; 531. Locking screw; 54. Gasket; 55. Cover plate; 56. Abutment plate; 60. Synchronous belt; 70. Shift rib. DETAILED DESCRIPTION

[0030] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0032] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above directional words are not used to limit the present invention.

[0033] Obviously, the embodiments described above are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0034] In order to solve the problem that curtain rails in the prior art are inconvenient to use, the present invention provides a curtain telescopic rail.

[0035] Example 1

[0036] like Figures 1 to 2 As shown, the curtain telescopic rail includes an outer rail 10, an inner rail 20, a first transmission assembly 30, a second transmission assembly 40, a retaining roller assembly 50, and a timing belt 60. One end of the inner rail 20 extends into and is slidably connected to the outer rail 10. The first transmission assembly 30 is disposed at the end of the outer rail 10 away from the inner rail 20. The second transmission assembly 40 is disposed at the end of the inner rail 20 away from the outer rail 10. There is at least one retaining roller assembly 50, which is adjustably positioned within either the inner rail 20 or the outer rail 10. The retaining roller assembly 50 has a locked state and an unlocked state. When the retaining roller assembly 50 is in the locked state, it is securely fixed to the inner rail 20 or the outer rail 10. A timing belt 60 is routed between the first transmission assembly 30, the retaining roller assembly 50, and the second transmission assembly 40, so that the timing belt 60 moves when the first transmission assembly 30 and the second transmission assembly 40 operate.

[0037] The curtain telescopic rail includes an outer guide rail 10, an inner guide rail 20, a first transmission assembly 30, a second transmission assembly 40, a positioning roller assembly 50 and a synchronous belt 60. One end of the inner guide rail 20 extends into the outer guide rail 10 and is slidably connected to the outer guide rail 10. The first transmission assembly 30 is arranged at the end of the outer guide rail 10 away from the inner guide rail 20, and the second transmission assembly 40 is arranged at the end of the inner guide rail 20 away from the outer guide rail 10. There is at least one positioning roller assembly 50, and the position of at least one positioning roller assembly 50 can be adjusted in the inner guide rail 20 or the outer guide rail 10. The positioning roller assembly 50 has a locked state and an unlocked state, and when the positioning roller assembly 5 When the first transmission assembly 30 and the second transmission assembly 40 are in a locked state, the locking roller assembly 50 is locked and fixed to the inner guide rail 20 or the outer guide rail 10, and the synchronous belt 60 is wound between the first transmission assembly 30, the locking roller assembly 50 and the second transmission assembly 40, so that when the first transmission assembly 30 and the second transmission assembly 40 are in motion, the synchronous belt 60 moves. In this way, the length of the curtain telescopic rail is adjusted by adjusting the position between the inner guide rail 20 and the outer guide rail 10, and the locking roller assembly 50 is used to adjust the synchronous belt 60 to an appropriate tightness to ensure the normal operation of the synchronous belt 60, so that the user can adjust the curtain telescopic rail conveniently and quickly according to actual needs, thereby greatly improving the user experience.

[0038] In this embodiment, at least one locking roller assembly 50 is adjustably positioned within the inner guide rail 20. The locking roller assembly 50 has a locked state and an unlocked state. When the locking roller assembly 50 is in the locked state, the locking roller assembly 50 is securely locked to the inner guide rail 20. Alternatively, at least one locking roller assembly 50 may be adjustably positioned within the outer guide rail 10. When the locking roller assembly 50 is in the locked state, the locking roller assembly 50 is securely locked to the outer guide rail 10. Both of these configurations can effectively adjust the tightness of the timing belt 60, and the preferred method can be selected based on actual needs.

[0039] like Figures 3 and 4 As shown, the locking roller assembly 50 includes a slide 51, a first pulley 52, and a locking member 53. The first pulley 52 is rotatably mounted on the slide 51, and the timing belt 60 is wound around the first pulley 52. ​​The locking member 53 is mounted on the slide 51 and has a locked state and an unlocked state. When the locking member 53 is in the locked state, it locks the slide 51 with the inner guide rail 20 or the outer guide rail 10, thereby switching the locking roller assembly 50 to the locked state.

[0040] like Figure 3 As shown, the locking member 53 is a columnar structure. The slide 51 has a locking hole 511. At least a portion of the locking member 53 passes through the locking hole 511 and locks with the inner guide rail 20. Of course, when the locking roller assembly 50 is adjustably positioned within the outer guide rail 10, at least a portion of the locking member 53 passes through the locking hole 511 and locks with the outer guide rail 10.

[0041] like Figure 3 As shown, the locking member 53 includes a locking screw 531. The locking post 511 has a first threaded hole. One end of the locking screw 531 extends from the first threaded hole and abuts against the inner surface of the inner guide rail 20, thereby switching the locking member 53 to a locked state. Of course, when the locking roller assembly 50 is adjustably positioned within the outer guide rail 10, one end of the locking screw 531 extends from the first threaded hole and abuts against the inner surface of the outer guide rail 10, thereby switching the locking member 53 to a locked state.

[0042] In this embodiment, the first threaded hole comprises a hollow section and a threaded section, with the locking screw 531 threadedly connected to the threaded section through the hollow section. The hollow section not only accommodates the locking screw 531 when the locking attachment 53 is in the locked state, but also facilitates installation of the telescopic curtain rail by inserting a screwdriver into the hollow section and dragging the locking roller assembly 50 to the appropriate position. In other words, when installing the telescopic curtain rail of this application, the installer only needs a screwdriver to adjust the position and secure the locking roller assembly 50, which is simple, quick, and time-saving.

[0043] In this embodiment, the first pulley 52 is a gear, and the synchronous belt 60 has a toothed section meshing with the gear.

[0044] In this embodiment, the center of the slide 51 has a recessed portion for receiving the first pulley 52. ​​The first pulley 52 is rotatably mounted within the recessed portion. Two locking posts 511 are formed on either side of the slide 51. Two locking elements 53 are provided, with each corresponding to the two locking posts 511. The recessed portion, housing the first pulley 52, creates a compact structure for the locking roller assembly 50, improving space utilization and minimizing the size of the telescopic curtain rail.

[0045] In this embodiment, the locking roller assembly 50 further includes a cover plate 55 . The cover plate 55 is at least disposed to cover the opening of the accommodating recess and is connected to the sliding seat 51 .

[0046] Specifically, the first pulley 52 has a first protrusion extending toward the cover plate 55, which has a first opening. The first protrusion extends into the first opening and is able to rotate within the first opening. The first pulley 52 has a second protrusion extending toward the receiving recess, which has a second opening on its surface. The second protrusion extends into the second opening and is able to rotate within the second opening. This arrangement allows the first pulley 52 to be fixed to the receiving recess of the slide 51 while being able to rotate freely.

[0047] In an optional embodiment (not shown), the slide 51 has an adjustable eccentric annular hole, and at least a portion of the first pulley 52 is rotatably disposed within the adjustable eccentric annular hole. The provision of the adjustable eccentric annular hole prevents interference between the synchronous belt 60 and the synchronous belt 60 during operation, thereby ensuring normal operation of the synchronous belt 60.

[0048] like Figures 3 and 4As shown, a stop rib 70 is provided in the sliding cavity of the inner guide rail 20, and the stop rib 70 extends along the extension direction of the curtain telescopic rail. The locking roller assembly 50 includes an abutment plate 56, which is provided on the slide 51. When the locking accessory 53 is in the locked state, the abutment plate 56 abuts against the stop rib 70 in the extension direction of the locking hole column 511. When the locking accessory 53 is in the unlocked state, the locking accessory 53 is released from the abutment with the inner guide rail 20, so that the abutment plate 56 and the stop rib 70 are released from the abutment. The limited engagement between the stop rib 70 and the abutment plate 56 not only prevents the locking roller assembly 50 from falling off from the inner guide rail 20, but also facilitates the locking of the locking roller assembly 50. Of course, when the locking roller assembly 50 is adjustably positioned within the outer guide rail 10, a retaining rib 70 is disposed within the sliding cavity of the outer guide rail 10. The retaining rib 70 extends along the extension direction of the curtain telescopic rail. When the locking member 53 is in the unlocked state, the locking member 53 is released from contact with the outer guide rail 10, thereby releasing contact between the abutment plate 56 and the retaining rib 70.

[0049] The first transmission assembly 30 includes at least one second pulley 31, and the second transmission assembly 40 includes at least one third pulley 41, and the number of second pulleys 31 is not equal to the number of third pulleys 41. In other words, the number of second pulleys 31 can be less than or greater than the number of third pulleys 41.

[0050] In this embodiment, the number of second pulleys 31 is less than the number of third pulleys 41. Specifically, there is one second pulley 31, two third pulleys 41, and one locking roller assembly 50. The locking roller assembly 50 is adjustably positioned on the inner guide rail 20. The synchronous belt 60 is connected end to end and passes through the second pulley 31, one third pulley 41, the locking roller assembly 50, and another third pulley 41 in sequence, so that the synchronous belt 60 forms a concave shape. By providing two third pulleys 41, the synchronous belt 60 can achieve a 180-degree reversal, and the locking roller assembly 50 can be set on the inner guide rail 20 to adjust the tightness of the synchronous belt 60, rationally utilizing the internal space of the curtain telescopic rail and greatly simplifying the structure of the curtain telescopic rail.

[0051] In an optional embodiment not shown in the figures, the number of second pulleys 31 is greater than the number of third pulleys 41. Specifically, there are two second pulleys 31, one third pulley 41, and one retaining roller assembly 50. The retaining roller assembly 50 is adjustably positioned on the inner guide rail 20. The synchronous belt 60 is connected end to end and passes through the third pulley 41, one second pulley 31, the retaining roller assembly 50, and another second pulley 31 in sequence, so that the synchronous belt 60 forms a concave shape. By providing two second pulleys 31, the synchronous belt 60 can achieve a 180-degree reversal, and the retaining roller assembly 50 can be set on the inner guide rail 20 to adjust the tightness of the synchronous belt 60, rationally utilizing the internal space of the curtain telescopic rail and greatly simplifying the structure of the curtain telescopic rail.

[0052] In this embodiment, the second pulley 31 and the third pulley 41 are both gears, and are engaged with the synchronous belt 60 .

[0053] In this embodiment, the curtain telescopic rail also includes a drive device. The drive device provides power for the automatic opening and closing of the curtain. Specifically, the drive device has a drive shaft that is drivably connected to the second pulley 31. When the drive device is started, it drives the second pulley 31 to rotate, thereby driving the synchronous belt 60 to operate. The synchronous belt 60 drives the third pulley 41 and the first pulley 52 to rotate. The curtain telescopic rail also includes a pulley assembly, which is provided with two pulley assemblies. The two pulley assemblies are respectively fixed to the two outer sides of the synchronous belt 60 and connected to the curtain. When the drive device drives the synchronous belt 60 to operate, the synchronous belt 60 can rotate forward or backward, causing the two pulley assemblies to move away from each other or relative to each other, thereby achieving the closing and opening of the curtain. Of course, the drive shaft of the drive device can also be drivably connected to the third pulley 41, and the selection can be made according to actual needs.

[0054] In this embodiment, the telescopic curtain rail further includes a lock. The lock locks the first transmission assembly 30 and the outer guide rail 10. The lock also locks the second transmission assembly 40 and the inner guide rail 20. The lock integrally connects the first transmission assembly 30 and the outer guide rail 10, and the second transmission assembly 40 and the inner guide rail 20, giving the telescopic curtain rail of this application an aesthetically pleasing overall appearance.

[0055] In this embodiment, the curtain telescopic rail further comprises a locking member. The locking member is arranged at one end of the inner rail 20 away from the second transmission assembly 40, so as to fasten the inner rail 20 and the outer rail 10 through the locking member after the length of the curtain telescopic rail is adjusted into place.

[0056] In this embodiment, the synchronous belt 60 is an open synchronous belt or a spliced ​​synchronous belt. Further, the synchronous belt 60 can also be replaced by a chain rope, a chain, etc., and a similar transmission effect can be achieved.

[0057] Example 2

[0058] The difference from the first embodiment lies in that the number of the second transmission assemblies 40 , the number of the positioning roller assemblies 50 , and the winding method of the synchronous belt 60 are different from those in the first embodiment.

[0059] Specifically, such as Figure 5 As shown, the first transmission assembly 30 includes a second pulley 31. The second transmission assembly 40 includes a third pulley 41. There are two locking roller assemblies 50. In this embodiment, the two locking roller assemblies 50 have two implementation methods according to different setting positions. The details are as follows:

[0060] In the first embodiment, two retaining roller assemblies 50 are respectively disposed on the inner guide rail 20 and the outer guide rail 10. A synchronous belt 60 is connected end to end and passes sequentially around the second pulley 31, the retaining roller assembly 50 on the inner guide rail 20, the retaining roller assembly 50 on the outer guide rail 10, and the third pulley 41. Furthermore, depending on the different configurations of the retaining roller assemblies 50, the retaining roller assemblies 50 can also be implemented in the following manner.

[0061] Mode 1: The locking roller assembly 50 on the outer guide rail 10 is fixedly arranged on the outer guide rail 10 . The locking roller assembly 50 on the inner guide rail 20 is adjustably arranged on the inner guide rail 20 .

[0062] In the second method, the retaining roller assembly 50 on the outer guide rail 10 is adjustably mounted thereon, while the retaining roller assembly 50 on the inner guide rail 20 is fixed thereon. Both methods offer a "one dynamic, one static" setup, which can be selected based on actual needs. With this setup, the tension of the timing belt 60 can be adjusted quickly and conveniently by simply adjusting one retaining roller assembly 50.

[0063] In a third method, the position of the retaining roller assembly 50 on the outer guide rail 10 is adjustably disposed on the outer guide rail 10, and the position of the retaining roller assembly 50 on the inner guide rail 20 is adjustably disposed on the inner guide rail 20. In this way, both retaining roller assemblies 50 can move on either the outer guide rail 10 or the inner guide rail 20, and the installer can adjust the position of the two retaining roller assemblies 50 at will, thereby making the adjustment of the timing belt 60 more flexible and precise.

[0064] In the second embodiment, both retaining roller assemblies 50 are disposed on the inner guide rail 20. The synchronous belt 60 is connected end to end and sequentially passes around the second pulley 31, the retaining roller assembly 50 away from the outer guide rail 10, the retaining roller assembly 50 close to the outer guide rail 10, and the third pulley 41. Furthermore, depending on the different arrangements of the retaining roller assemblies 50, the retaining roller assemblies 50 may have the following embodiments.

[0065] In the first method, the two positioning roller assemblies 50 on the inner guide rail 20 are both adjustable. In this way, the two positioning roller assemblies 50 can move on the inner guide rail 20, and the installer can adjust the position of the two positioning roller assemblies 50 at will, thereby making the adjustment of the synchronous belt 60 more flexible and accurate.

[0066] In the second method, one of the two retaining roller assemblies 50 on the inner guide rail 20 is adjustably mounted on the inner guide rail 20, while the other retaining roller assembly 50 is fixedly mounted on the inner guide rail 20. This arrangement of two retaining roller assemblies 50, one dynamic and one static, allows for quick and convenient adjustment of the tension of the timing belt 60 by simply adjusting one retaining roller assembly 50. Preferably, the other retaining roller assembly 50 is fixedly mounted on the end of the inner guide rail 20 away from the second transmission assembly 40. This allows the inner guide rail 20 to be stretched to its maximum length, meeting the user's desired length requirements.

[0067] In this way, the third pulleys 41 of the second transmission assembly 40 are reduced from two to one, and the reversing function of the original third pulley 41 is replaced by the newly added positioning roller assembly 50, thereby reducing the volume of the second transmission assembly 40 and simplifying the structure, making the overall appearance of the curtain telescopic rail in this application more beautiful and compact, and improving the user experience.

[0068] Example 3

[0069] The difference from the first embodiment is that the locking state of the locking roller assembly 50 is achieved in a different manner from that of the first embodiment.

[0070] Specifically, such as Figure 6 As shown, the locking roller assembly 50 further includes a washer 54. The washer 54 is positioned below the locking post 511 and has a second threaded hole. The locking member 53 includes a locking screw 531. The locking screw 531 passes through the locking post 511 and the second threaded hole, then abuts against the inner surface of the inner guide rail 20, thereby locking the locking member 53. Of course, when the locking roller assembly 50 is adjustably positioned within the outer guide rail 10, the locking screw 531 passes through the locking post 511 and the second threaded hole, then abuts against the inner surface of the outer guide rail 10, thereby locking the locking member 53.

[0071] From the above description, it can be seen that the above-mentioned embodiment of the present invention achieves the following technical effects: the curtain telescopic rail includes an outer guide rail 10, an inner guide rail 20, a first transmission assembly 30, a second transmission assembly 40, a positioning roller assembly 50 and a synchronous belt 60, one end of the inner guide rail 20 extends into the outer guide rail 10 and is slidably connected to the outer guide rail 10, the first transmission assembly 30 is arranged at the end of the outer guide rail 10 away from the inner guide rail 20, the second transmission assembly 40 is arranged at the end of the inner guide rail 20 away from the outer guide rail 10, there is at least one positioning roller assembly 50, and the position of at least one positioning roller assembly 50 is adjustably arranged in the inner guide rail 20 or the outer guide rail 10, and the positioning roller assembly 50 has a locking state. When the locking roller assembly 50 is in the locked state, the locking roller assembly 50 is locked and fixed to the inner guide rail 20 or the outer guide rail 10, and the synchronous belt 60 is wound between the first transmission assembly 30, the locking roller assembly 50 and the second transmission assembly 40, so that when the first transmission assembly 30 and the second transmission assembly 40 are in motion, the synchronous belt 60 moves. In this way, the length of the curtain telescopic rail is adjusted by adjusting the position between the inner guide rail 20 and the outer guide rail 10, and the synchronous belt 60 is adjusted to an appropriate tightness through the locking roller assembly 50 to ensure the normal operation of the synchronous belt 60, so that the user can adjust the curtain telescopic rail conveniently and quickly according to actual needs, thereby greatly improving the user experience.

[0072] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0073] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0074] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A curtain telescopic rail, characterized in that: include: Outer guide rail (10); an inner guide rail (20), one end of the inner guide rail (20) extending into the outer guide rail (10) and being slidably connected to the outer guide rail (10); a first transmission assembly (30), the first transmission assembly (30) being arranged at an end of the outer guide rail (10) away from the inner guide rail (20); a second transmission assembly (40), the second transmission assembly (40) being arranged at an end of the inner guide rail (20) away from the outer guide rail (10); a locking roller assembly (50), wherein the locking roller assembly (50) is at least one, and the position of the at least one locking roller assembly (50) is adjustably arranged in the inner guide rail (20) or the outer guide rail (10), and the locking roller assembly (50) has a locked state and an unlocked state, and when the locking roller assembly (50) is in the locked state, the locking roller assembly (50) is locked and fixed with the inner guide rail (20) or the outer guide rail (10); a synchronous belt (60), the synchronous belt (60) being wound between the first transmission assembly (30), the positioning roller assembly (50) and the second transmission assembly (40), so that the synchronous belt (60) moves when the first transmission assembly (30) and the second transmission assembly (40) are in motion; The positioning roller assembly (50) comprises: Sliding seat (51); a first pulley (52), the first pulley (52) being rotatably disposed on the slide seat (51), and the synchronous belt (60) being wound around the first pulley (52); A locking accessory (53) is provided on the slide (51) and has a locked state and a unlocked state. When the locking accessory (53) is in the locked state, the locking accessory (53) locks the slide (51) with the inner guide rail (20) or the outer guide rail (10), so that the locking roller assembly (50) switches to the locked state.

2. The curtain telescopic rail according to claim 1, characterized in that: The locking attachment (53) is a columnar structure, and the sliding seat (51) has a locking hole column (511). At least a portion of the locking attachment (53) passes through the locking hole column (511) and is locked with the inner guide rail (20) or the outer guide rail (10).

3. The curtain telescopic rail according to claim 2, characterized in that: The locking accessory (53) includes a locking screw (531), the locking hole column (511) has a first threaded hole, and one end of the locking screw (531) extends from the first threaded hole and abuts against the inner surface of the inner guide rail (20) or the inner surface of the outer guide rail (10), so that the locking accessory (53) switches to the locked state.

4. The curtain telescopic rail according to claim 3, characterized in that: The first threaded hole has a hollow section and a threaded section, and the locking screw (531) is threadedly connected to the threaded section through the hollow section.

5. The curtain telescopic rail according to claim 2, characterized in that: The locking roller assembly (50) further includes a gasket (54), which is arranged below the locking hole column (511), and the gasket (54) has a second threaded hole. The locking accessory (53) includes a locking screw (531), and the locking screw (531) passes through the locking hole column (511) and the second threaded hole in sequence and then abuts against the inner surface of the inner guide rail (20) or the inner surface of the outer guide rail (10), so that the locking accessory (53) switches to the locked state.

6. The curtain telescopic rail according to claim 1, characterized in that: The slide seat (51) is provided with an adjustable eccentric annular hole, and at least a portion of the first pulley (52) is rotatably arranged in the adjustable eccentric annular hole.

7. The curtain telescopic rail according to claim 1, characterized in that: The middle part of the slide (51) has an accommodating recess, the first pulley (52) is rotatably arranged in the accommodating recess, the slide (51) is located on both sides of the accommodating recess and has two locking hole columns (511), the locking accessories (53) are two, and the two locking hole columns (511) are arranged in a one-to-one correspondence with the two locking accessories (53).

8. The curtain telescopic rail according to claim 1, characterized in that: The middle portion of the slide (51) has an accommodating recess, the first pulley (52) is rotatably disposed in the accommodating recess, and the positioning roller assembly (50) further comprises a cover plate (55), the cover plate (55) at least covers the opening of the accommodating recess and is connected to the slide (51).

9. The curtain telescopic rail according to claim 2, characterized in that: A shift rib (70) is provided in the sliding cavity of the inner guide rail (20) and / or the sliding cavity of the outer guide rail (10), and the shift rib (70) extends along the extension direction of the curtain telescopic rail. The locking roller assembly (50) includes an abutment plate (56), and the abutment plate (56) is provided on the slide seat (51). When the locking accessory (53) is in the locked state, the abutment plate (56) abuts against the shift rib (70) in the extension direction of the locking hole column (511). When the locking accessory (53) is in the unlocked state, the locking accessory (53) releases the abutment against the inner guide rail (20) and / or the outer guide rail (10), so that the abutment plate (56) and the shift rib (70) are released from abutment.

10. The curtain telescopic rail according to any one of claims 1 to 9, characterized in that: The first transmission assembly (30) includes at least one second pulley (31), the second transmission assembly (40) includes at least one third pulley (41), and the number of the second pulleys (31) is not equal to the number of the third pulleys (41).

11. The curtain telescopic rail according to claim 10, characterized in that: The number of the second pulley (31) is one, the number of the third pulleys (41) is two, the number of the positioning roller assembly (50) is one, and the synchronous belt (60) is connected end to end and sequentially passes through the second pulley (31), one third pulley (41), the positioning roller assembly (50) and another third pulley (41), so that the synchronous belt (60) is in a concave shape.

12. The curtain telescopic rail according to claim 11, characterized in that: The position of the locking roller assembly (50) is adjustable on the inner guide rail (20).

13. The curtain telescopic rail according to any one of claims 1 to 9, characterized in that: The first transmission assembly (30) includes a second pulley (31), the second transmission assembly (40) includes a third pulley (41), and the number of the positioning roller assemblies (50) is two. The two positioning roller assemblies (50) are respectively arranged on the inner guide rail (20) and the outer guide rail (10), and the synchronous belt (60) is connected end to end and passes through the second pulley (31), the positioning roller assembly (50) on the inner guide rail (20), the positioning roller assembly (50) on the outer guide rail (10), and the third pulley (41) in sequence; or The two positioning roller assemblies (50) are both arranged on the inner guide rail (20), and the synchronous belt (60) is connected end to end and sequentially passes around the second pulley (31), the positioning roller assembly (50) away from the outer guide rail (10), the positioning roller assembly (50) close to the outer guide rail (10), and the third pulley (41).

14. The curtain telescopic rail according to claim 13, characterized in that: The locking roller assembly (50) on the outer guide rail (10) is fixedly arranged on the outer guide rail (10), and the locking roller assembly (50) on the inner guide rail (20) is adjustably arranged on the inner guide rail (20); or The position of the locking roller assembly (50) on the outer guide rail (10) is adjustably arranged on the outer guide rail (10), and the position of the locking roller assembly (50) on the inner guide rail (20) is fixedly arranged on the inner guide rail (20); or The position of the locking roller assembly (50) on the outer guide rail (10) is adjustably arranged on the outer guide rail (10), and the position of the locking roller assembly (50) on the inner guide rail (20) is adjustably arranged on the inner guide rail (20); or The two positioning roller assemblies (50) on the inner guide rail (20) are both arranged on the inner guide rail (20) in an adjustable manner; or One of the two locking roller assemblies (50) on the inner guide rail (20) is adjustably arranged on the inner guide rail (20), and the other locking roller assembly (50) is fixedly arranged on the inner guide rail (20).

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