阅读说明：本技术 窗帘伸缩轨 (Curtain telescopic rail ) 是由 兰志明 于 2021-02-05 设计创作，主要内容包括：本发明提供了一种窗帘伸缩轨。窗帘伸缩轨包括：外导轨；内导轨,内导轨的一端伸入外导轨内并与外导轨滑动连接；第一传动组件,第一传动组件设置在外导轨远离内导轨的一端；第二传动组件,第二传动组件设置在内导轨远离外导轨的一端；卡位滚轮组件,卡位滚轮组件为至少一个,至少一个卡位滚轮组件位置可调节地设置在内导轨或外导轨内,卡位滚轮组件具有锁定状态和解锁状态,且当卡位滚轮组件处于锁定状态时,卡位滚轮组件与内导轨或外导轨锁紧固定；同步带,同步带绕经在第一传动组件、卡位滚轮组件和第二传动组件之间,以使第一传动组件和第二传动组件动作时,同步带运动。本发明解决了现有技术中窗帘轨道使用不方便的问题。(The invention provides a curtain telescopic rail. The curtain telescopic rail includes: an outer guide rail; one end of the inner guide rail extends into the outer guide rail and is connected with the outer guide rail in a sliding manner; the first transmission assembly is arranged at one end of the outer guide rail, which is far away from the inner guide rail; the second transmission assembly is arranged at one end of the inner guide rail, which is far away from the outer guide rail; the clamping roller assembly is arranged in the inner guide rail or the outer guide rail in a position-adjustable manner, has a locking state and an unlocking state, and is locked and fixed with the inner guide rail or the outer guide rail when in the locking state; the synchronous belt is wound among the first transmission assembly, the clamping roller assembly and the second transmission assembly, so that the synchronous belt moves when the first transmission assembly and the second transmission assembly move. The invention solves the problem that the curtain rail in the prior art is inconvenient to use.)

1. A telescopic curtain rail, comprising:

an outer guide rail (10);

one end of the inner guide rail (20) extends into the outer guide rail (10) and is connected with the outer guide rail (10) in a sliding manner;

a first transmission assembly (30), wherein the first transmission assembly (30) is arranged at one end of the outer guide rail (10) far away from the inner guide rail (20);

a second transmission assembly (40), wherein the second transmission assembly (40) is arranged at one end of the inner guide rail (20) far away from the outer guide rail (10);

the clamping roller assembly (50), the clamping roller assembly (50) is at least one, the position of at least one clamping roller assembly (50) is adjustably arranged in the inner guide rail (20) or the outer guide rail (10), the clamping roller assembly (50) has a locking state and an unlocking state, and when the clamping roller assembly (50) is in the locking state, the clamping roller assembly (50) is locked and fixed with the inner guide rail (20) or the outer guide rail (10);

synchronous belt (60), synchronous belt (60) around warp first drive assembly (30) screens roller assembly (50) with between second drive assembly (40), so that first drive assembly (30) with when second drive assembly (40) move, synchronous belt (60) move.

2. The telescopic curtain rail as claimed in claim 1, wherein the clamping roller assembly (50) comprises:

a slide (51);

a first pulley (52), wherein the first pulley (52) is rotatably arranged on the sliding seat (51), and the synchronous belt (60) is wound around the first pulley (52);

the locking mechanism comprises a locking accessory (53), wherein the locking accessory (53) is arranged on the sliding seat (51) and has a locking state and a locking releasing state, and when the locking accessory (53) is in the locking state, the sliding seat (51) is locked by the locking accessory (53) with the inner guide rail (20) or the outer guide rail (10), so that the clamping roller assembly (50) is switched to the locking state.

3. The telescopic window curtain rail as claimed in claim 2, wherein the locking member (53) has a cylindrical structure, the sliding base (51) has a locking hole (511), and at least a part of the locking member (53) passes through the locking hole (511) and is locked with the inner rail (20) or the outer rail (10).

4. The telescopic curtain rail as claimed in claim 3, wherein the locking attachment (53) comprises a locking screw (531), the locking hole column (511) has a first threaded hole, and one end of the locking screw (531) protrudes from the first threaded hole and abuts against the inner surface of the inner rail (20) or the inner surface of the outer rail (10) to switch the locking attachment (53) to the locking state.

5. The telescopic curtain rail as claimed in claim 4, wherein 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.

6. The telescopic curtain rail as claimed in claim 3, wherein the clamping roller assembly (50) further comprises a spacer (54), the spacer (54) is disposed below the locking hole column (511), the spacer (54) has a second threaded hole, the locking accessory (53) comprises a locking screw (531), and the locking screw (531) passes through the locking hole column (511) and the second threaded hole in sequence and abuts against the inner surface of the inner rail (20) or the inner surface of the outer rail (10) so that the locking accessory (53) is switched to the locking state.

7. A telescopic curtain rail according to claim 2, characterised in that said slide (51) has an adjustable eccentric annular hole in which at least part of said first pulley (52) is rotatably arranged.

8. The telescopic curtain rail as claimed in claim 2, wherein the sliding base (51) has a receiving recess in the middle, the first pulley (52) is rotatably disposed in the receiving recess, two locking holes (511) are formed on the sliding base (51) at two sides of the receiving recess, the number of the locking parts (53) is two, and the two locking holes (511) and the two locking parts (53) are disposed in a one-to-one correspondence.

9. The telescopic curtain rail as claimed in claim 2, wherein the sliding base (51) has a receiving recess at a middle portion thereof, the first pulley (52) is rotatably disposed in the receiving recess, the clamping roller assembly (50) further comprises a cover plate (55), and the cover plate (55) covers at least an opening of the receiving recess and is connected to the sliding base (51).

10. Window blind extension rail according to claim 3, characterized in that a blocking rib (70) is provided in the sliding chamber of the inner rail (20) and/or in the sliding chamber of the outer rail (10), the gear ribs (70) extend along the extending direction of the curtain telescopic rail, the clamping roller assembly (50) comprises a butt plate (56), the butt plate (56) is arranged on the sliding seat (51), when the lock attachment (53) is in the lock attachment state, the abutting plate (56) abuts against the shift rib (70) in the extending direction of the lock attachment hole column (511), when the lock attachment (53) is in the lock attachment release state, the lock attachment (53) is released from abutment with the inner rail (20) and/or the outer rail (10), so that the abutment plate (56) is disengaged from the gear rib (70).

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

12. The telescopic curtain rail as claimed in claim 11, wherein the number of the second pulleys (31) is one, the number of the third pulleys (41) is two, the clamping roller assembly (50) is one, and the synchronous belt (60) is connected end to end and sequentially bypasses the second pulleys (31), one of the third pulleys (41), the clamping roller assembly (50) and the other of the third pulleys (41), so that the synchronous belt (60) is in a concave shape.

13. The window covering telescopic rail of claim 12, wherein the position of the detent roller assembly (50) is adjustably provided on the inner rail (20).

14. The telescopic rail for window coverings according to any of claims 1 to 10, wherein the first transmission assembly (30) comprises a second pulley (31), the second transmission assembly (40) comprises a third pulley (41), the number of the detent roller assemblies (50) is two,

the two clamping 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 sequentially bypasses the second pulley (31), the clamping roller assembly (50) on the inner guide rail (20), the clamping roller assembly (50) on the outer guide rail (10) and the third pulley (41); or

Two screens roller components (50) all set up on inner rail (20), hold-in range (60) end to end and walk around in proper order second pulley (31), keep away from outer rail (10) screens roller components (50), be close to outer rail (10) screens roller components (50) with third pulley (41).

15. The telescopic window curtain rail of claim 14,

the clamping roller assembly (50) on the outer guide rail (10) is fixedly arranged on the outer guide rail (10), and the clamping roller assembly (50) on the inner guide rail (20) is adjustably arranged on the inner guide rail (20); or

The position of the clamping roller assembly (50) on the outer guide rail (10) is adjustably arranged on the outer guide rail (10), and the clamping roller assembly (50) on the inner guide rail (20) is fixedly arranged on the inner guide rail (20); or

The position of the clamping roller assembly (50) on the outer guide rail (10) is adjustably arranged on the outer guide rail (10), and the position of the clamping roller assembly (50) on the inner guide rail (20) is adjustably arranged on the inner guide rail (20); or

The two clamping roller assemblies (50) on the inner guide rail (20) are both arranged on the inner guide rail (20) in a position-adjustable manner; or

One of the two clamping roller assemblies (50) on the inner guide rail (20) is adjustably arranged on the inner guide rail (20) in position, and the other clamping roller assembly (50) is fixedly arranged on the inner guide rail (20).

Technical Field

The invention relates to the technical field of curtains, in particular to a curtain telescopic rail.

Background

Present electric window curtain track is mostly a word rail, and the user need measure in advance and provide measured data before the mounting rail and let the supplier carry out the track customization, and the track of customization is the track of non-adjustable length, still needs the secondary equipment after the user takes the track, and such operation is not only time-consuming, also can increase the cost of labor simultaneously in a large number, still has to measure the risk that leads to secondary operation inaccurately.

From the above, there is the inconvenient problem of curtain track use in the prior art.

Disclosure of Invention

The invention mainly aims to provide a curtain telescopic rail to solve the problem that a curtain rail in the prior art is inconvenient to use.

In order to achieve the above object, the present invention provides a curtain telescopic rail, comprising: an outer guide rail; one end of the inner guide rail extends into the outer guide rail and is connected with the outer guide rail in a sliding manner; the first transmission assembly is arranged at one end of the outer guide rail, which is far away from the inner guide rail; the second transmission assembly is arranged at one end of the inner guide rail, which is far away from the outer guide rail; the clamping roller assembly is arranged in the inner guide rail or the outer guide rail in a position-adjustable manner, has a locking state and an unlocking state, and is locked and fixed with the inner guide rail or the outer guide rail when in the locking state; the synchronous belt is wound among the first transmission assembly, the clamping roller assembly and the second transmission assembly, so that the synchronous belt moves when the first transmission assembly and the second transmission assembly move.

Further, screens roller assembly includes: a slide base; the first pulley is rotatably arranged on the sliding seat, and the synchronous belt is wound around the first pulley; and the locking accessory is arranged on the sliding seat and has a locking state and a locking releasing state, and when the locking accessory is in the locking state, the sliding seat is locked with the inner guide rail or the outer guide rail by the locking accessory so that the clamping roller assembly switches the locking state.

Furthermore, the lock accessory is of a cylindrical structure, the sliding seat is provided with a lock accessory hole column, and at least one part of the lock accessory penetrates through the lock accessory hole column and then is locked with the inner guide rail or the outer guide rail.

Furthermore, the locking accessory comprises a locking screw, the locking hole column is provided with a first threaded hole, and one end of the locking screw extends out of the first threaded hole and abuts against the inner surface of the inner guide rail or the inner surface of the outer guide rail, so that the locking accessory is switched to a locking state.

Furthermore, the first threaded hole is provided with a hollow section and a threaded section, and the locking screw is in threaded connection with the threaded section through the hollow section.

Furthermore, screens roller assembly still includes the gasket, and the gasket sets up in the below of lock attaches the hole post, and the gasket has the second screw hole, and lock attaches the piece including the lock and attaches the screw, and the lock attaches the screw and passes behind lock attaches hole post and the second screw hole in proper order and butt on the internal surface of inner guide rail or the internal surface of outer guide rail to make the lock attach the piece switch to the lock and attach the state.

Further, the slide has an adjustable eccentric annular aperture therein, and at least a portion of the first pulley is rotatably disposed within the adjustable eccentric annular aperture.

Furthermore, the middle of the sliding seat is provided with an accommodating concave part, the first pulley is rotatably arranged in the accommodating concave part, two locking hole columns are formed on two sides of the sliding seat, which are positioned in the accommodating concave part, the number of the locking accessories is two, and the two locking hole columns and the two locking accessories are arranged in a one-to-one correspondence manner.

Furthermore, the middle part of the sliding seat is provided with an accommodating concave part, the first pulley is rotatably arranged in the accommodating concave part, and the clamping roller assembly further comprises a cover plate which at least covers the opening of the accommodating concave part and is connected with the sliding seat.

Furthermore, a sliding cavity of the inner guide rail and/or a sliding cavity of the outer guide rail are/is internally provided with a blocking rib which extends along the extending direction of the telescopic rail of the curtain, the blocking roller assembly comprises a butting plate which is arranged on the sliding seat, when the locking accessory is in a locking state, the butting plate and the blocking rib are butted in the extending direction of the locking accessory hole column, and when the locking accessory is in a locking and detaching state, the locking accessory is detached from the butting connection with the inner guide rail and/or the outer guide rail, so that the butting plate is detached from the blocking rib.

Furthermore, the first transmission assembly comprises at least one second pulley, the second transmission assembly comprises at least one third pulley, and the number of the second pulleys is not equal to that of the third pulleys.

Furthermore, the number of the second pulleys is one, the number of the third pulleys is two, the clamping roller assembly is one, and the synchronous belt is connected end to end and sequentially bypasses the second pulley, one third pulley, the clamping roller assembly and the other third pulley so as to enable the synchronous belt to be in a concave shape.

Further, the position of the clamping roller assembly is adjustably arranged on the inner guide rail.

Furthermore, the first transmission assembly comprises a second pulley, the second transmission assembly comprises a third pulley, the number of the clamping roller assemblies is two, the two clamping roller assemblies are respectively arranged on the inner guide rail and the outer guide rail, and the synchronous belt is connected end to end and sequentially bypasses the second pulley, the clamping roller assembly on the inner guide rail, the clamping roller assembly on the outer guide rail and the third pulley; or the two clamping roller assemblies are arranged on the inner guide rail, and the synchronous belt is connected end to end and sequentially bypasses the second pulley, the clamping roller assembly far away from the outer guide rail, the clamping roller assembly close to the outer guide rail and the third pulley.

Furthermore, the clamping roller assembly on the outer guide rail is fixedly arranged on the outer guide rail, and the position of the clamping roller assembly on the inner guide rail is adjustably arranged on the inner guide rail; or the position of the clamping roller component on the outer guide rail is adjustably arranged on the outer guide rail, and the clamping roller component on the inner guide rail is fixedly arranged on the inner guide rail; or the position of the clamping roller assembly on the outer guide rail is adjustably arranged on the outer guide rail, and the position of the clamping roller assembly on the inner guide rail is adjustably arranged on the inner guide rail; or the two clamping roller assemblies on the inner guide rail are both adjustably arranged on the inner guide rail; or one of the two clamping roller assemblies on the inner guide rail is adjustably arranged on the inner guide rail, and the other clamping roller assembly is fixedly arranged on the inner guide rail.

By applying the technical scheme of the invention, the curtain telescopic rail comprises an outer guide rail, an inner guide rail, a first transmission assembly, a second transmission assembly, a clamping roller assembly and a synchronous belt, wherein one end of the inner guide rail extends into the outer guide rail and is connected with the outer guide rail in a sliding way, the first transmission assembly is arranged at one end of the outer guide rail far away from the inner guide rail, the second transmission assembly is arranged at one end of the inner guide rail far away from the outer guide rail, the clamping roller assembly is at least one clamping roller assembly, the position of at least one clamping roller assembly is adjustably arranged in the inner guide rail or the outer guide rail, the clamping roller assembly has a locking state and an unlocking state, when the clamping roller assembly is in the locking state, the clamping roller assembly is fixedly locked with the inner guide rail or the outer guide rail, the synchronous belt is wound among the first transmission assembly, the clamping roller assembly and the second transmission assembly, so that the synchronous belt moves when the first transmission assembly and, the length of the curtain telescopic rail is adjusted by adjusting the position between the inner guide rail and the outer guide rail, the synchronous belt is adjusted to a proper tightness through the clamping roller wheel assembly, normal operation of the synchronous belt is guaranteed, a user can adjust the curtain telescopic rail conveniently and quickly according to actual requirements, and the problem that a curtain rail in the prior art is inconvenient to use is solved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is an exploded view of a curtain telescopic rail according to a first embodiment of the present invention;

FIG. 2 is a schematic view of a telescopic rail of a window covering according to a first embodiment of the present invention;

FIG. 3 is an exploded view of the detent roller assembly in the first embodiment of the present invention;

FIG. 4 shows a cross-sectional view of the detent roller assembly in a first embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a telescopic rail of a curtain according to a second embodiment of the present invention;

fig. 6 shows an exploded view of the detent roller assembly in the third embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. an outer guide rail; 20. an inner guide rail; 30. a first transmission assembly; 31. a second pulley; 40. a second transmission assembly; 41. a third pulley; 50. a clamping roller assembly; 51. a slide base; 511. locking the hole column; 52. a first pulley; 53. a lock attachment; 531. locking screws; 54. a gasket; 55. a cover plate; 56. a butt joint plate; 60. a synchronous belt; 70. gear ribs.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present invention, unless specified to the contrary, use of the terms of orientation such as "upper, lower, top, bottom" or the like, generally refer to the orientation as shown in the drawings, or to the component itself in a vertical, perpendicular, or gravitational orientation; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

It is to be understood that the above-described embodiments are only a few, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In order to solve the problem that the curtain rail in the prior art is inconvenient to use, the invention provides a curtain telescopic rail.

Example one

As shown in fig. 1 to 2, the curtain telescopic rail includes an outer rail 10, an inner rail 20, a first driving assembly 30, a second driving assembly 40, a catching roller assembly 50, and a timing belt 60. One end of the inner rail 20 extends into the outer rail 10 and is slidably connected with the outer rail 10. A first transmission assembly 30 is provided at the end of the outer rail 10 remote from the inner rail 20. The second transmission assembly 40 is disposed at an end of the inner rail 20 remote from the outer rail 10. The number of the clamping roller assemblies 50 is at least one, the position of at least one clamping roller assembly 50 is adjustably arranged in the inner rail 20 or the outer rail 10, the clamping roller assembly 50 has a locking state and an unlocking state, and when the clamping roller assembly 50 is in the locking state, the clamping roller assembly 50 is fixedly locked with the inner rail 20 or the outer rail 10. The timing belt 60 is wound around the first driving unit 30, the catching roller unit 50, and the second driving unit 40, so that the timing belt 60 moves when the first driving unit 30 and the second driving unit 40 are operated.

The curtain telescopic rail comprises an outer guide rail 10, an inner guide rail 20, a first transmission assembly 30, a second transmission assembly 40, a clamping roller assembly 50 and a synchronous belt 60, wherein one end of the inner guide rail 20 extends into the outer guide rail 10 and is in sliding connection with the outer guide rail 10, the first transmission assembly 30 is arranged at one end of the outer guide rail 10 far away from the inner guide rail 20, the second transmission assembly 40 is arranged at one end of the inner guide rail 20 far away from the outer guide rail 10, at least one clamping roller assembly 50 is arranged in the inner guide rail 20 or the outer guide rail 10 in an adjustable mode, the clamping roller assembly 50 has a locking state and an unlocking state, when the clamping roller assembly 50 is in the locking state, the clamping roller assembly 50 is locked and fixed with the inner guide rail 20 or the outer guide rail 10, the synchronous belt 60 is wound among the first transmission assembly 30, the clamping roller assembly 50 and the second transmission assembly 40, so that when the first transmission assembly 30 and the second transmission assembly 40 act, the synchronous belt 60 moves, so 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, the synchronous belt 60 is adjusted to a proper tightness through the clamping roller assembly 50, the normal operation of the synchronous belt 60 is ensured, a user can conveniently and rapidly adjust the curtain telescopic rail according to actual requirements, and the user experience is greatly improved.

In the present embodiment, at least one detent roller assembly 50 is positionally adjustably disposed within the inner rail 20. The clamping roller assembly 50 has a locked state and an unlocked state, and when the clamping roller assembly 50 is in the locked state, the clamping roller assembly 50 is locked and fixed with the inner rail 20. Of course, at least one locking roller assembly 50 may be adjustably positioned within the outer rail 10, and the locking roller assembly 50 is locked and fixed with the outer rail 10 when the locking roller assembly 50 is in the locked state. Above-mentioned two kinds of mode homoenergetic that set up can reach the effect of the elasticity of effective regulation hold-in range 60, can select according to actual demand.

As shown in fig. 3 to 4, the catching roller assembly 50 includes a slider 51, a first pulley 52, and a locking attachment 53. The first pulley 52 is rotatably provided on the carriage 51, and the timing belt 60 is wound around the first pulley 52. The lock attachment 53 is provided on the slider 51 and has a lock-attached state and a lock-detached state. When the lock attachment 53 is in the lock attachment state, the lock attachment 53 locks the slide base 51 with the inner rail 20 or the outer rail 10, so that the card roller assembly 50 switches the lock state.

As shown in fig. 3, the lock attachment 53 has a cylindrical structure. The slider 51 has a keyhole post 511. At least a portion of the locking attachment 53 passes through the locking attachment hole 511 and locks with the inner rail 20. Of course, when the position of the catching roller assembly 50 is adjustably disposed in the outer rail 10, at least a portion of the lock attachment 53 is locked with the outer rail 10 after passing through the lock attachment hole column 511.

As shown in fig. 3, the locking attachment 53 includes a locking attachment screw 531. The locking hole column 511 has a first threaded hole, and one end of the locking screw 531 protrudes from the first threaded hole and abuts against the inner surface of the inner rail 20, so that the locking piece 53 is switched to the locking state. Of course, when the position of the position-adjustable locking roller assembly 50 is disposed in the outer rail 10, one end of the locking screw 531 extends from the first threaded hole and abuts against the inner surface of the outer rail 10, so that the locking member 53 is switched to the locking state.

In this embodiment, the first threaded hole has a hollow section and a threaded section, and the locking screw 531 is in threaded connection with the threaded section through the hollow section. The hollow section can accommodate the locking screw 531 when the locking member 53 is in the locking state, and can facilitate an installer to insert a screwdriver into the hollow section to drag the position-locking roller assembly 50 to move the position-locking roller assembly 50 to a proper position during the installation of the curtain telescopic rail. That is to say, when installing the curtain telescopic rail of this application, the installer only needs a screwdriver can accomplish the position adjustment and the fixed to screens roller assembly 50, and is simple swift, labour saving and time saving.

In this embodiment, the first pulley 52 is a gear. The timing belt 60 has a toothed section that meshes with the gear.

In the present embodiment, the slider 51 has an accommodation recess in the middle. The first pulley 52 is rotatably disposed in the accommodating recess, and the slider 51 is formed with two locking hole columns 511 at two sides of the accommodating recess. The number of the locking attachments 53 is two, and the two locking attachment hole columns 511 are arranged in one-to-one correspondence with the two locking attachments 53. By arranging the accommodating concave part and accommodating the first pulley 52 therein, the clamping roller assembly 50 has a compact structure, improves the space utilization rate and enables the volume of the curtain telescopic rail to be as small as possible.

In this embodiment, the detent roller assembly 50 further includes a cover plate 55. The cover plate 55 covers at least the opening of the receiving recess and is connected to the slider 51.

Specifically, the first pulley 52 has a first boss protruding toward the cover plate 55, and the cover plate 55 has a first opening. The first convex column extends into the first opening, and the first convex column can rotate in the first opening. The first pulley 52 has a second convex pillar extending toward the receiving recess, the surface of the receiving recess has a second opening, the second convex pillar extends into the second opening, and the second convex pillar can rotate in the second opening. With the above arrangement, the first pulley 52 can be fixed in the receiving recess of the slider 51 and can rotate freely.

In an alternative embodiment not shown in the figures, the slide 51 has an adjustable eccentric annular aperture in which at least a portion of the first pulley 52 is rotatably disposed. Through setting up adjustable eccentric annular hole, can prevent the mutual interference that hold-in range 60 probably produced at the operation in-process, guarantee hold-in range 60's normal operating.

As shown in fig. 3 to 4, a shift rib 70 is disposed in the sliding cavity of the inner rail 20, and the shift rib 70 extends along the extending direction of the curtain telescopic rail. The detent roller assembly 50 includes an abutment plate 56, the abutment plate 56 being disposed on the slide 51. When the lock attachment 53 is in the lock attachment state, the abutment plate 56 abuts with the shift rib 70 in the extending direction of the lock attachment hole column 511. When the lock attachment 53 is in the lock attachment released state, the lock attachment 53 is released from abutment with the inner rail 20, so that the abutment plate 56 is released from abutment with the shift rib 70. Through the spacing joint between fender position rib 70 and butt plate 56, not only make screens roller assembly 50 be difficult for following interior guide rail 20 and drop, also conveniently lock screens roller assembly 50 and attach. Of course, when the position of the detent roller assembly 50 is adjustably disposed in the outer rail 10, the detent rib 70 is disposed in the sliding cavity of the outer rail 10, and the detent rib 70 extends along the extending direction of the curtain telescopic rail. When the lock attachment 53 is in the lock attachment released state, the lock attachment 53 is released from abutment with the outer rail 10, so that the abutment plate 56 is released from abutment with the shift rib 70.

The first transmission assembly 30 comprises at least one second pulley 31, the second transmission assembly 40 comprises at least one third pulley 41, and the number of the second pulleys 31 is not equal to that of the third pulleys 41. That is, the number of the second pulleys 31 may be smaller than the number of the third pulleys 41, or may be larger than the number of the third pulleys 41.

In the present embodiment, the number of the second pulleys 31 is smaller than the number of the third pulleys 41. Specifically, the number of the second pulleys 31 is one, the number of the third pulleys 41 is two, and the clamping roller assembly 50 is one. The detent roller assembly 50 is positionally adjustably provided on the inner rail 20. The synchronous belt 60 is connected end to end and sequentially passes around the second pulley 31, a third pulley 41, the blocking roller assembly 50 and another third pulley 41, so that the synchronous belt 60 is in a concave shape. Through setting up two third pulleys 41 for 180 degrees commutations can be realized to hold-in range 60, and then make screens roller component 50 can set up and adjust the elasticity of hold-in range 60 on inner rail 20, the rational utilization inside space of the flexible rail of (window) curtain, simplified the structure of the flexible rail of (window) curtain greatly.

In an alternative embodiment not shown in the figures, the number of second pulleys 31 is greater than the number of third pulleys 41. Specifically, the number of the second pulleys 31 is two, the number of the third pulleys 41 is one, and the number of the clamping roller assemblies 50 is one. The detent roller assembly 50 is positionally adjustably provided on the inner rail 20. The synchronous belt 60 is connected end to end and sequentially passes around the third pulley 41, one second pulley 31, the blocking roller assembly 50 and the other second pulley 31, so that the synchronous belt 60 is in a concave shape. Through setting up two second pulleys 31 for 180 degrees commutations can be realized to hold-in range 60, and then make screens roller component 50 can set up and adjust the elasticity of hold-in range 60 on inner rail 20, the rational utilization the inner space of the flexible rail of (window) curtain, simplified the structure of the flexible rail of (window) curtain greatly.

In the present embodiment, the second pulley 31 and the third pulley 41 are both gears, and are both engaged with the timing belt 60.

In this embodiment, the curtain telescopic rail further comprises a driving device. The driving device provides power for the automatic opening and closing of the curtain. In particular, the drive means has a drive shaft which is in driving connection with the second pulley 31. When the driving device is started, the second pulley 31 is driven to rotate, and then the synchronous belt 60 is driven to run, and the synchronous belt 60 drives the third pulley 41 and the first pulley 52 to rotate. The curtain telescopic rail also comprises two pulley assemblies, and the two pulley assemblies are respectively fixed on two outer side edges of the synchronous belt 60 and connected with the curtain. When the driving device drives the synchronous belt 60 to operate, the synchronous belt 60 can rotate in a forward direction or a reverse direction, so that the two pulley assemblies move back to back or move relatively, and the curtain is closed and opened. Of course, the driving shaft of the driving device may also be in driving connection with the third pulley 41, and may be selected according to actual requirements.

In this embodiment, the curtain telescopic rail further comprises a lock head. The lock head lockingly attaches the first drive assembly 30 to the outer track 10. The lock head lockingly attaches the second drive assembly 40 to the inner track 20. Through setting up the tapered end, connect first drive assembly 30 and outer guide rail 10, second drive assembly 40 and interior guide rail 20 as an organic whole for the whole outward appearance elegant appearance of the flexible rail of (window) curtain of this application.

In this embodiment, the window covering telescopic rail further comprises a locking member. The locking member is provided at an end of the inner rail 20 remote from the second driving assembly 40 to fasten the inner rail 20 and the outer rail 10 by the locking member after the length of the window covering telescopic rail is adjusted in place.

In the present embodiment, the timing belt 60 is an open timing belt or a connection timing belt. Further, the timing belt 60 may be replaced by a chain, or the like, so as to achieve a similar transmission effect.

Example two

The difference from the first embodiment is that the number of the second driving assemblies 40, the number of the clamping roller assemblies 50 and the winding manner of the timing belt 60 are different from the first embodiment.

Specifically, as shown in fig. 5, the first transmission assembly 30 includes a second pulley 31. The second transmission assembly 40 includes a third pulley 41. The screens roller assembly 50 is two. In the present embodiment, the two detent roller assemblies 50 have two embodiments according to different setting positions. The method comprises the following specific steps:

in the first embodiment, two catching roller assemblies 50 are respectively provided on the inner rail 20 and the outer rail 10. The synchronous belt 60 is connected end to end and sequentially passes around the second pulley 31, the clamping roller assembly 50 on the inner guide rail 20, the clamping roller assembly 50 on the outer guide rail 10 and the third pulley 41. Further, the positioning roller assembly 50 has the following embodiments according to the different arrangement of the positioning roller assembly 50.

In the first mode, the clamping roller assembly 50 on the outer rail 10 is fixedly arranged on the outer rail 10. The position of the detent roller assembly 50 on the inner rail 20 is adjustably set on the inner rail 20.

In the second mode, the position of the locking roller assembly 50 on the outer rail 10 is adjustably set on the outer rail 10, and the locking roller assembly 50 on the inner rail 20 is fixedly set on the inner rail 20. The two modes are both a 'one-dynamic one-static' setting mode and can be selected according to actual requirements. By adopting the arrangement mode, the adjustment of the tightness of the synchronous belt 60 can be completed by only adjusting one clamping roller assembly 50, and the adjustment is convenient and fast.

In a third mode, the position of the catching roller assembly 50 on the outer rail 10 is adjustably set on the outer rail 10, and the position of the catching roller assembly 50 on the inner rail 20 is adjustably set on the inner rail 20. Thus, the two clamping roller assemblies 50 can move on the outer guide rail 10 or the inner guide rail 20, and an installer can adjust the positions of the two clamping roller assemblies 50 at will, so that the adjustment of the synchronous belt 60 is more flexible and accurate.

In the second embodiment, two clamping roller assemblies 50 are disposed on the inner rail 20, and the synchronous belt 60 is connected end to end and sequentially passes around the second pulley 31, the clamping roller assembly 50 far away from the outer rail 10, the clamping roller assembly 50 near the outer rail 10 and the third pulley 41. Further, the positioning roller assembly 50 has the following embodiments according to the different arrangement of the positioning roller assembly 50.

In a first mode, both of the detent roller assemblies 50 on the inner rail 20 are adjustably positioned on the inner rail 20. Thus, the two clamping roller assemblies 50 can move on the inner guide rail 20, and an installer can adjust the positions of the two clamping roller assemblies 50 at will, so that the synchronous belt 60 can be adjusted more flexibly and accurately.

In the second mode, one of the two locking roller assemblies 50 on the inner rail 20 is adjustably positioned on the inner rail 20, and the other locking roller assembly 50 is fixedly positioned on the inner rail 20. Therefore, the two clamping roller assemblies 50 are arranged in a 'one-moving-one-static' mode, and the adjustment of the tightness of the synchronous belt 60 can be completed only by adjusting one clamping roller assembly 50, so that the synchronous belt is convenient and fast. Preferably, another detent roller assembly 50 is fixedly disposed at an end of the inner rail 20 remote from the second drive assembly 40. This allows the inner rail 20 to be stretched to a limited length to meet the user's length of use requirements as much as possible.

Like this reduce the third pulley 41 of second drive assembly 40 into one by two, replace the switching-over function of original third pulley 41 by newly-increased screens roller assembly 50 to make the volume of second drive assembly 40 reduce, simple structure makes the whole appearance of the flexible rail of (window) curtain in this application more pleasing to the eye small and exquisite, improves user experience.

EXAMPLE III

The difference from the first embodiment is that the locking state of the locking roller assembly 50 is realized in a different manner from the first embodiment.

Specifically, as shown in fig. 6, the detent roller assembly 50 further includes a spacer 54. The spacer 54 is disposed below the locking hole column 511, the spacer 54 has a second threaded hole, the locking piece 53 includes a locking screw 531, and the locking screw 531 sequentially passes through the locking hole column 511 and the second threaded hole and abuts against the inner surface of the inner rail 20, so that the locking piece 53 is switched to the locking state. Of course, when the position of the locking roller assembly 50 is adjustably disposed in the outer rail 10, the locking screw 531 sequentially passes through the locking hole column 511 and the second screw hole and then abuts against the inner surface of the outer rail 10, so that the locking member 53 is switched to the locking state.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects: the curtain telescopic rail comprises an outer guide rail 10, an inner guide rail 20, a first transmission assembly 30, a second transmission assembly 40, a clamping roller assembly 50 and a synchronous belt 60, wherein one end of the inner guide rail 20 extends into the outer guide rail 10 and is in sliding connection with the outer guide rail 10, the first transmission assembly 30 is arranged at one end of the outer guide rail 10 far away from the inner guide rail 20, the second transmission assembly 40 is arranged at one end of the inner guide rail 20 far away from the outer guide rail 10, at least one clamping roller assembly 50 is arranged in the inner guide rail 20 or the outer guide rail 10 in an adjustable mode, the clamping roller assembly 50 has a locking state and an unlocking state, when the clamping roller assembly 50 is in the locking state, the clamping roller assembly 50 is locked and fixed with the inner guide rail 20 or the outer guide rail 10, the synchronous belt 60 is wound among the first transmission assembly 30, the clamping roller assembly 50 and the second transmission assembly 40, so that when the first transmission assembly 30 and the second transmission assembly 40 act, the synchronous belt 60 moves, so 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, the synchronous belt 60 is adjusted to a proper tightness through the clamping roller assembly 50, the normal operation of the synchronous belt 60 is ensured, a user can conveniently and rapidly adjust the curtain telescopic rail according to actual requirements, and the user experience is greatly improved.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.