CN214905788U - Telescopic curtain rail - Google Patents

Abstract

The utility model discloses a telescopic curtain rail, which comprises a main transmission case, an auxiliary transmission case, a telescopic guide rail, a synchronous belt, a pulley mechanism and a fastening belt piece; the main transmission box and the auxiliary transmission box are respectively connected to two ends of the telescopic guide rail and used for changing the length of the curtain rail; the synchronous belt is arranged in a circle around the main transmission box and the auxiliary transmission box and the telescopic guide rail so as to drive the synchronous rotation; the pulley mechanisms are used for hanging the curtain, the two pulley mechanisms are movably arranged on the telescopic guide rail, the two pulley mechanisms respectively clamp two oppositely arranged belt sections of the synchronous belt, so that the rotation of the synchronous belt is used for controlling the opening and closing movement of the two pulley mechanisms, and the pulley mechanisms are of a structure capable of adjusting the clamping force of the synchronous belt; the fastening belt piece is fixedly connected with a pulley mechanism, the fastening belt piece is fixedly connected with one end of the synchronous belt, and the pulley mechanism connected with the fastening belt piece clamps and fixes the other end of the synchronous belt; the scheme realizes the free extension and transportation of the curtain rail and practically solves the problems of difficult transportation and the like of the existing curtain rail.

Description

Telescopic curtain rail

Technical Field

The utility model relates to a (window) curtain track field, in particular to telescopic (window) curtain track.

Background

In the prior art, the curtain rail is of a fixed-size structure, so that a plurality of models with different specifications are often produced in the production process to meet different application requirements, but due to the fact that the specifications are not uniform or the sizes of certain products are too long, great troubles are brought to transportation, and a technical scheme capable of solving the problems is urgently needed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a telescopic (window) curtain track to solve the problem of current (window) curtain track transportation difficulty.

In order to solve the technical problem, the utility model provides a telescopic curtain rail, which comprises a main transmission box, an auxiliary transmission box, a telescopic guide rail, a synchronous belt, a pulley mechanism and a fastening belt piece; the main transmission box and the auxiliary transmission box are respectively connected to two ends of the telescopic guide rail, and the telescopic guide rail is used for changing the free telescopic length of the curtain rail in a telescopic way; the synchronous belt passes through the main transmission box, the auxiliary transmission box and the telescopic guide rail and is arranged in a circle in a surrounding manner, and the main transmission box and the auxiliary transmission box are both meshed with the synchronous belt so as to be used for driving the synchronous belt to rotate; the pulley mechanisms are used for hanging curtains, the two pulley mechanisms are movably mounted on the telescopic guide rail, the two pulley mechanisms respectively clamp two oppositely arranged belt sections of the synchronous belt, so that the rotation of the synchronous belt is used for controlling the opening and closing movement of the two pulley mechanisms, and the pulley mechanisms are of a structure capable of adjusting the clamping force of the synchronous belt; the fastening belt piece is fixedly connected with one pulley mechanism, the fastening belt piece is fixedly connected with one end of the synchronous belt, and the pulley mechanism connected with the fastening belt piece clamps and fixes the other end of the synchronous belt.

In one embodiment, the sled mechanism includes a base plate, a clamp plate, and a tightening screw; a belt penetrating groove is formed in one side of the base plate, a pressure port is formed in the position, opposite to the clamping plate, of the belt penetrating groove, the pressure port is communicated with the inside of the belt penetrating groove, the synchronous belt penetrates through the belt penetrating groove, and the tooth position of the synchronous belt is opposite to the pressure port; the clamping plate and the position opposite to the pressure port are provided with a tooth mesh, the tightening screw penetrates through the base plate and is connected with the clamping plate, and the tightening of the tightening screw is used for moving the clamping plate to the belt penetrating groove so that the tooth mesh is meshed with the tooth position of the synchronous belt.

In one embodiment, the surface of the substrate, which faces away from the through-groove, is provided with a plate-mounting groove; the splint include pinion rack and atress board, the adjacent two surfaces of pinion rack be equipped with respectively the jack with the rodent, the pinion rack is equipped with the position embedding of rodent in the pressure port, the atress board embedding dress board inslot, the lateral part of atress board inserts in the jack, it passes to screw up the screw the base plate with the atress board is connected.

In one embodiment, a spring piece is arranged in the plate loading groove and is abutted against the stress plate, and the spring piece is used for pushing the stress plate to move away from the plate loading groove.

In one embodiment, the pulley mechanism further comprises a curtain hole plate and a tightening plate, the curtain hole plate and the tightening plate are respectively arranged on two opposite sides of the base plate, the curtain hole plate is used for hanging a curtain, the tightening plate is abutted to the stress plate, and the tightening screw penetrates through the curtain hole plate, the base plate and the stress plate and then is in threaded connection with the tightening plate.

In one embodiment, the belt penetrating groove is provided with an adjusting hole, the adjusting hole is communicated with the inside of the belt penetrating groove, and the adjusting hole and the pressure port are respectively arranged at two opposite sides of the synchronous belt.

In one embodiment, the pulley mechanism and the fastening band are detachably connected.

In one embodiment, the telescopic guide rail comprises an inner guide rail, an outer guide rail and a guide rail; the main transmission box is fixedly connected with one end of the inner guide rail, the auxiliary transmission box is fixedly connected with one end of the guide rail, the outer guide rail is sleeved outside the inner guide rail and the guide rail, and the inner guide rail and the guide rail are used for moving in and out of the outer guide rail; and one the pulley mechanism is slidably mounted on the inner guide rail, the other one is slidably mounted on the outer guide rail, a notch is arranged on the guide rail, and the notch is used for allowing the pulley mechanism to move so far to perform the dragging adjustment of the synchronous belt.

In one embodiment, a positioning block is arranged on the bottom surface of the end part of the outer guide rail, which is adjacent to the inner guide rail, the positioning block extends outwards in the direction of the inner guide rail, a positioning screw is arranged at the outwards extending part of the positioning block, and the screwing of the positioning screw is used for fixing the relative position of the outer guide rail and the inner guide rail.

In one embodiment, the pulley mechanism is provided with rollers which are arranged on two sides of the pulley mechanism, the rollers comprise a small wheel and a large wheel which are coaxially arranged, and the diameter of the small wheel is smaller than that of the large wheel; the outer guide rail is provided with two limiting walls which are oppositely arranged, the two limiting walls are arranged inside the outer guide rail, the pulley mechanism is arranged between the two limiting walls, and the small wheel is in rolling contact with the limiting walls; the inner guide rail is internally provided with a sliding chute, the two sliding chutes are respectively arranged at the outer sides of the two limiting walls, and the bull wheel is arranged in the sliding chute in a rolling manner.

The utility model has the advantages as follows:

because the telescopic guide rail is used for changing the length of the curtain rail, the telescopic transportation of the curtain rail is realized, but after the curtain rail is folded and unfolded, the synchronous belt can extrude and wind, and the normal use in the future can be influenced; and for solving this problem, the utility model discloses still set up fastening band spare and one tackle mechanism connects fixedly, fastening band spare with the one end of hold-in range is connected fixedly, is connected fastening band spare the tackle mechanism centre gripping is fixed the other end of hold-in range, just tackle mechanism is right hold-in range centre gripping dynamics adjustable structure is removing the tight back of tackle mechanism to the clamp of hold-in range promptly, will pull out the hold-in range in order to realize the take-in range taut to the phenomenon of hold-in range extrusion wraparound prevents to appear, has solved the problem of current (window) curtain track transportation difficulty conscientiously.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings required for the embodiments will be briefly described below, and obviously, the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a retractable window covering track according to an embodiment of the present invention;

FIG. 2 is a schematic view of the adjustment state of FIG. 1;

FIG. 3 is a schematic view of the contracted state structure of FIG. 1;

FIG. 4 is a schematic structural view of the pulley mechanism of FIG. 1;

FIG. 5 is a rear view of FIG. 4;

FIG. 6 is a schematic diagram of the front view of the substrate of FIG. 4;

FIG. 7 is a rear view of the substrate of FIG. 4;

figure 8 is a schematic view of the tooth plate structure of figure 4;

FIG. 9 is a cross-sectional structural schematic view of the telescoping rail of FIG. 1;

FIG. 10 is a partially enlarged schematic view of the bottom view of FIG. 1;

FIG. 11 is a schematic view of the positioning block of FIG. 10;

FIG. 12 is an enlarged view of part A of FIG. 11;

FIG. 13 is a side view schematic of the structure of FIG. 11;

FIG. 14 is a schematic view of the second locking member of FIG. 13 after movement;

FIG. 15 is a partially disassembled first sectional view of FIG. 1;

FIG. 16 is a second partially disassembled cross-sectional view of FIG. 1;

fig. 17 is a schematic view of the guide rail structure of fig. 1.

The reference numbers are as follows:

11. a main transmission case; 12. a secondary transmission case;

20. a telescopic guide rail; 21. an inner guide rail; 211. a chute; 22. an outer guide rail; 221. a limiting wall; 23. a guide rail; 231. a notch;

30. a synchronous belt;

40. a pulley mechanism; 41. a substrate; 411. a belt penetrating groove; 412. pressing a port; 413. a plate loading groove; 414. a spring plate; 415. an adjustment hole; 42. a splint; 421. a rodent; 422. a toothed plate; 423. a stress plate; 424. A jack; 43. a curtain orifice plate; 44. tightening the plate; 45. screwing down the screw; 46. a roller; 461. a small wheel; 462. A bull wheel;

50. fastening the belt member;

60. positioning blocks; 61. a set screw; 621. a first locking member; 622. a second locking member; 631. a first locking hole; 632. a second locking hole.

Detailed Description

The technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

The utility model discloses a telescopic curtain track, the embodiment of which is shown in figures 1 to 3, comprising a main transmission box 11, an auxiliary transmission box 12, a telescopic guide rail 20, a synchronous belt 30, a pulley mechanism 40 and a fastening belt 50; the main transmission box 11 and the auxiliary transmission box 12 are respectively connected to two ends of the telescopic guide rail 20, and the telescopic length of the telescopic guide rail 20 is used for changing the free telescopic length of the curtain rail; the synchronous belt 30 passes through the main transmission case 11, the auxiliary transmission case 12 and the telescopic guide rail 20 and is arranged in a circle in a surrounding manner, and the main transmission case 11 and the auxiliary transmission case 12 are both meshed with the synchronous belt 30 to drive the synchronous belt 30 to rotate; the pulley mechanisms 40 are used for hanging curtains, the two pulley mechanisms 40 are movably mounted on the telescopic guide rail 20, the two pulley mechanisms 40 respectively clamp two oppositely arranged belt sections of the synchronous belt 30, so that the rotation of the synchronous belt 30 is used for controlling the opening and closing movement of the two pulley mechanisms 40, and the pulley mechanisms 40 are of a structure capable of adjusting the clamping force of the synchronous belt 30; the fastening tape member 50 is fixedly connected to a pulley mechanism 40, the fastening tape member 50 is fixedly connected to one end of the timing belt 30, and the pulley mechanism 40 connected to the fastening tape member 50 holds and fixes the other end of the timing belt 30.

As shown in fig. 1 and 2, at this time, the curtain rail is in an extended state, the right pulley mechanism 40 is fixedly connected to the fastening tape 50, and since the right pulley mechanism 40 clamps the synchronous belt 30, the length adjustment operation of the synchronous belt 30 cannot be performed, so that the maximum contraction length of the curtain rail is limited; if the curtain rail needs to be extended, the telescopic rail 20 can be retracted to the state shown in fig. 3 by simply releasing the clamping of the right pulley mechanism 40 to the synchronous belt 30, thereby realizing the length adjustment of the curtain rail. After the length of the curtain rail is adjusted, the right pulley mechanism 40 is reused to clamp the synchronous belt 30; after the length of the curtain rail is adjusted, the redundant synchronous belts 30 are cut off, so that the scheme realizes the contraction transportation of the curtain rail and practically solves the problem of difficult transportation of the existing curtain rail; the appearance of the track does not depart from the characteristics of the traditional track, the track is universal for all transmission cases on the market, and the product is grounded.

As shown in fig. 4 to 8, the pulley mechanism 40 includes a base plate 41, a clamp plate 42, and a tightening screw 45; a belt penetrating groove 411 is formed in one side of the substrate 41, a pressure port 412 is formed in a position, opposite to the clamping plate 42, of the belt penetrating groove 411, the pressure port 412 is communicated with the inside of the belt penetrating groove 411, the synchronous belt 30 penetrates through the belt penetrating groove 411, and the tooth position of the synchronous belt 30 is opposite to the pressure port 412; the portion of the clamping plate 42 opposite to the pressing port 412 is provided with a rolling tooth 421, a tightening screw 45 penetrates through the base plate 41 to be connected with the clamping plate 42, and the tightening of the tightening screw 45 is used for moving the clamping plate 42 towards the penetrating belt slot 411 so that the rolling tooth 421 is engaged with the tooth position of the synchronous belt 30.

That is, when the tightening screw 45 is in a tightened state, the clamping plate 42 will move towards the through-slot 411, so that the rodent 421 can be tightly engaged with the tooth position at the end of the synchronous belt 30, thereby limiting the maximum length of the synchronous belt 30 and preventing the curtain rail from stretching; after the screw 45 is loosened, the tooth 421 and the tooth position at the end of the synchronous belt 30 are disengaged, that is, the synchronous belt 30 can freely move in the through belt slot 411, and the length of the curtain rail is adjusted by matching with the telescopic guide rail 20.

As shown in fig. 4 to 8, a board mounting groove 413 is formed on a surface of the substrate 41 opposite to the through-slot 411; the clamping plate 42 comprises a toothed plate 422 and a stress plate 423, two adjacent surfaces of the toothed plate 422 are respectively provided with a socket 424 and a tooth 421, the part of the toothed plate 422 provided with the tooth 421 is embedded into the pressing opening 412, the stress plate 423 is embedded into the plate loading groove 413, the side part of the stress plate 423 is inserted into the socket 424, and the tightening screw 45 penetrates through the base plate 41 and is connected with the stress plate 423.

At this time, the clamping plate 42 is divided into two parts, namely a toothed plate 422 and a stress plate 423, so that the toothed plate 422 can be conveniently mounted and dismounted, and after the screw 45 is tightened, the stress plate 423 tightly presses the plate loading groove 413, so that the toothed plate 422 is driven to move towards the belt passing groove 411, and the tight meshing of the tooth 421 and the tooth position at the end part of the synchronous belt 30 is realized; and after the screw 45 is screwed down, the thrust exerted by the force bearing plate 423 on the toothed plate 422 disappears, and the meshing between the tooth 421 and the tooth position at the end of the synchronous belt 30 is released, so that the length adjustment of the curtain track is facilitated.

As shown in fig. 4 to 8, a spring piece 414 is disposed in the plate loading groove 413, the spring piece 414 abuts against the force-bearing plate 423, and the spring piece 414 is used for pushing the force-bearing plate 423 to move away from the plate loading groove 413.

Therefore, after the screw 45 is unscrewed, the spring piece 414 can apply thrust to the stress plate 423, so that the stress plate 423 drives the toothed plate 422 to move away from the through belt slot 411, thereby ensuring that the toothed plate 422 and the synchronous belt 30 can be disengaged, and providing important guarantee for smooth length adjustment of the curtain track; the number of the spring pieces 414 is not limited, and the spring pieces 414 may be integrally formed with the base plate 41.

As shown in fig. 4 to 8, the pulley mechanism 40 further includes a curtain hole plate 43 and a tightening plate 44, the curtain hole plate 43 and the tightening plate 44 are respectively disposed on two opposite sides of the base plate 41, the curtain hole plate 43 is used for hanging the curtain, the tightening plate 44 abuts against the stress plate 423, and the tightening screw 45 is threaded to the tightening plate 44 after passing through the curtain hole plate 43, the base plate 41, and the stress plate 423.

After the curtain hole plate 43 is arranged, the curtain hole plate 43 can be used for hanging a curtain, and because the two pulley mechanisms 40 can move in opposite directions and in opposite directions, the pulley mechanisms 40 can move to drive the curtain to extend and store through the curtain hole plate 43; after the tightening plate 44 is arranged, the tightening plate 44 is in threaded connection with the tightening screw 45, so that the distance between the tightening plate 44 and the stress plate 423 can be adjusted by screwing the tightening screw 45, and convenience is provided for adjusting the clamping force of the pulley mechanism 40.

As shown in fig. 4 to 8, the tape passing groove 411 is provided with an adjusting hole 415, the adjusting hole 415 is communicated with the inside of the tape passing groove 411, and the adjusting hole 415 and the pressing port 412 are respectively arranged at two opposite sides of the synchronous belt 30.

Since there may be a state that the tooth 421 and the tooth position of the timing belt 30 cannot be disengaged after the screw 45 is loosened, the clamping plate 42 can be pushed to move away from the timing belt 30 by inserting a tool such as a screwdriver into the adjusting hole 415 after the adjusting hole 415 is additionally formed, thereby achieving complete separation of the tooth 421 and the tooth position of the timing belt 30.

As shown in fig. 4, the pulley mechanism 40 and the fastening tape member 50 are detachably connected.

If the pulley mechanism 40 is fixedly connected with the fastening band 50, two pulley mechanisms 40 with different shapes may need to be designed, thereby increasing the mold opening cost; at this time, the pulley mechanism 40 and the fastening tape 50 may be fastened or screwed, and the detachable connection of the two may be adopted, so that repeated mold opening of the pulley mechanism 40 is not required, the fastening tape 50 may be connected to any pulley mechanism 40, and the problem of wrong installation position of the pulley mechanism 40 may not occur.

As shown in fig. 1, 2, 4, 9 and 17, the telescopic rail 20 includes an inner rail 21, an outer rail 22 and a guide rail 23; the main transmission case 11 is fixedly connected with one end of the inner guide rail 21, the auxiliary transmission case 12 is fixedly connected with one end of the guide rail 23, the outer guide rail 22 is sleeved outside the inner guide rail 21 and the guide rail 23, and the inner guide rail 21 and the guide rail 23 are used for moving in and out of the outer guide rail 22; one pulley mechanism 40 is slidably mounted on the inner rail 21, the other pulley mechanism 40 is slidably mounted on the outer rail 22, a notch 231 is formed in the guide rail 23, and the notch 231 is used for allowing the pulley mechanism 40 to move so far to perform pulling adjustment of the synchronous belt 30.

After the structure is adopted, the movement of the two pulley mechanisms 40 and the expansion and contraction of the telescopic guide rail 20 are realized, thereby providing guarantee for the stable work of the utility model; and when the pulley mechanism 40 moves to the position of the gap 231, the timing belt 30 can be exposed at the gap 231, so that the operator can adjust the whole length of the curtain rail by pulling the timing belt 30.

As shown in fig. 9 to 14, a positioning block 60 is disposed on a bottom surface of an end portion of the outer rail 22 adjacent to the inner rail 21, the positioning block 60 extends outward in a direction toward the inner rail 21, a positioning screw 61 is disposed at a portion of the positioning block 60 extending outward, and the fastening of the positioning screw 61 is used to fix a relative position of the outer rail 22 and the inner rail 21.

Therefore, when the length of the telescopic guide 20 needs to be adjusted, the set screw 61 needs to be loosened, and when the length of the telescopic guide 20 needs to be fixed, the relative position between the outer guide 22 and the inner guide 21 can be fixed by tightening the set screw 61, thereby preventing the length of the telescopic guide 20 from being changed.

Specifically, the positioning block 60 includes a first locking member 621 and a second locking member 622, the first locking member 621 is fixedly connected to the outer rail 22, and the second locking member 622 is movably connected to the first locking member 621, so that the second locking member 622 can rotate to a certain extent; wherein, be equipped with first locking hole 631 on the first retaining member 621, be equipped with second locking hole 632 on the second retaining member 622, first locking hole 631 is relative with second locking hole 632, and has slight dislocation between first locking hole 631 and the second locking hole 632, so pass first locking hole 631 and second locking hole 632 when set screw 61 and lock the back, will lead to second retaining member 622 to produce the upset to this compresses tightly inner rail 21, thereby realized the rigidity between inner rail 21 and the outer rail 22.

As shown in fig. 15 and 16, the pulley mechanism 40 is provided with rollers 46, the rollers 46 are arranged on both sides of the pulley mechanism 40, the rollers 46 include a small wheel 461 and a large wheel 462 which are coaxially arranged, and the wheel diameter of the small wheel 461 is smaller than that of the large wheel 462; the outer guide rail 22 is provided with two limiting walls 221 which are oppositely arranged, the two limiting walls 221 are arranged inside the outer guide rail 22, the pulley mechanism 40 is arranged between the two limiting walls 221, and the small wheel 461 is in rolling contact with the limiting walls 221; the inner guide rail 21 is provided with a sliding groove 211 inside, the two sliding grooves 211 are respectively arranged at the outer sides of the two limiting walls 221, and the bull wheel 462 is arranged in the sliding groove 211 in a rolling manner.

In actual use, the curtain rails will be arranged in the direction shown in fig. 10, so when the pulley mechanism 40 is placed in the inner rail 21, the large wheel 462 will be in rolling contact with the sliding groove 211 of the inner rail 21, ensuring smooth movement of the pulley mechanism 40 in the inner rail 21; as shown in fig. 11, when the carriage mechanism 40 is placed in the outer rail 22, the small wheel 461 will be in rolling contact with the stopper wall 221 of the outer rail 22, ensuring smooth movement of the carriage mechanism 40 in the outer rail 22; that is, when the pulley mechanism 40 moves alternately between the inner rail 21 and the outer rail 22, the pulley mechanism 40 can still rotate smoothly, which brings better user experience.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims (10)

1. A retractable curtain rail is characterized in that,

the device comprises a main transmission case, an auxiliary transmission case, a telescopic guide rail, a synchronous belt, a pulley mechanism and a fastening belt piece;

the main transmission box and the auxiliary transmission box are respectively connected to two ends of the telescopic guide rail, and the telescopic guide rail is used for changing the free telescopic length of the curtain rail in a telescopic way;

the synchronous belt passes through the main transmission box, the auxiliary transmission box and the telescopic guide rail and is arranged in a circle in a surrounding manner, and the main transmission box and the auxiliary transmission box are both meshed with the synchronous belt so as to be used for driving the synchronous belt to rotate;

the pulley mechanisms are used for hanging curtains, the two pulley mechanisms are movably mounted on the telescopic guide rail, the two pulley mechanisms respectively clamp two oppositely arranged belt sections of the synchronous belt, so that the rotation of the synchronous belt is used for controlling the opening and closing movement of the two pulley mechanisms, and the pulley mechanisms are of a structure capable of adjusting the clamping force of the synchronous belt;

the fastening belt piece is fixedly connected with one pulley mechanism, the fastening belt piece is fixedly connected with one end of the synchronous belt, and the pulley mechanism connected with the fastening belt piece clamps and fixes the other end of the synchronous belt.

2. The window covering track of claim 1,

the pulley mechanism comprises a base plate, a clamping plate and a tightening screw;

a belt penetrating groove is formed in one side of the base plate, a pressure port is formed in the position, opposite to the clamping plate, of the belt penetrating groove, the pressure port is communicated with the inside of the belt penetrating groove, the synchronous belt penetrates through the belt penetrating groove, and the tooth position of the synchronous belt is opposite to the pressure port;

the clamping plate and the position opposite to the pressure port are provided with a tooth mesh, the tightening screw penetrates through the base plate and is connected with the clamping plate, and the tightening of the tightening screw is used for moving the clamping plate to the belt penetrating groove so that the tooth mesh is meshed with the tooth position of the synchronous belt.

3. The window covering track of claim 2,

the surface of the substrate, which is opposite to the through-groove, is provided with a plate mounting groove;

the splint include pinion rack and atress board, the adjacent two surfaces of pinion rack be equipped with respectively the jack with the rodent, the pinion rack is equipped with the position embedding of rodent in the pressure port, the atress board embedding dress board inslot, the lateral part of atress board inserts in the jack, it passes to screw up the screw the base plate with the atress board is connected.

4. The window covering track as defined in claim 3, wherein a spring leaf is disposed in the panel-mounting groove, the spring leaf abutting against the force-bearing plate, the spring leaf being configured to urge the force-bearing plate to move away from the panel-mounting groove.

5. The window curtain rail of claim 3, wherein the pulley mechanism further comprises a curtain hole plate and a tightening plate, the curtain hole plate and the tightening plate are respectively arranged on two opposite sides of the base plate, the curtain hole plate is used for hanging a window curtain, the tightening plate is abutted against the stress plate, and the tightening screw penetrates through the curtain hole plate, the base plate and the stress plate and then is in threaded connection with the tightening plate.

6. The window curtain rail of claim 2, wherein the slot penetrating groove is provided with an adjusting hole, the adjusting hole is communicated with the inside of the slot penetrating groove, and the adjusting hole and the pressing opening are respectively arranged at two opposite sides of the synchronous belt.

7. The window covering track as defined in claim 1, wherein the pulley mechanism is removably coupled to the fastening strip.

8. The window covering track of claim 1,

the telescopic guide rail comprises an inner guide rail, an outer guide rail and a guide rail; the main transmission box is fixedly connected with one end of the inner guide rail, the auxiliary transmission box is fixedly connected with one end of the guide rail, the outer guide rail is sleeved outside the inner guide rail and the guide rail, and the inner guide rail and the guide rail are used for moving in and out of the outer guide rail;

and one the pulley mechanism is slidably mounted on the inner guide rail, the other one is slidably mounted on the outer guide rail, a notch is arranged on the guide rail, and the notch is used for allowing the pulley mechanism to move so far to perform the dragging adjustment of the synchronous belt.

9. The window curtain rail of claim 8, wherein a positioning block is disposed on a bottom surface of an end portion of the outer rail adjacent to the inner rail, the positioning block extends outward in a direction of the inner rail, a positioning screw is disposed on a portion of the positioning block extending outward, and tightening of the positioning screw is used to fix a relative position of the outer rail and the inner rail.

10. The window covering track of claim 8,

the pulley mechanism is provided with idler wheels, the idler wheels are arranged on two sides of the pulley mechanism and comprise small wheels and large wheels which are coaxially arranged, and the wheel diameters of the small wheels are smaller than those of the large wheels;

the outer guide rail is provided with two limiting walls which are oppositely arranged, the two limiting walls are arranged inside the outer guide rail, the pulley mechanism is arranged between the two limiting walls, and the small wheel is in rolling contact with the limiting walls;

the inner guide rail is internally provided with a sliding chute, the two sliding chutes are respectively arranged at the outer sides of the two limiting walls, and the bull wheel is arranged in the sliding chute in a rolling manner.

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