CN211582554U - Curtain structure - Google Patents

Abstract

The utility model discloses a curtain structure, it contains: the upper rail is provided with at least two rail rods in an internal and external sleeving way, so that the curtain can be completely retracted into the other rail rod when being manufactured and packaged, the size of the upper rail is greatly reduced, the packaging and transportation cost is reduced, the two rail rods provide pulley block sliding displacement of the pulley block through the vertical guide rail, and the vertical guide rail does not generate height drop between the two rail rods which are sleeved inside and outside and is beneficial to improving the smoothness of the pulley block sliding displacement.

Description

Curtain structure

Technical Field

The present invention relates to a curtain structure, and more particularly, to a curtain structure capable of reducing the volume of packing materials and improving the practicability.

Background

Referring to fig. 22, a conventional curtain structure is shown, in which the curtain 40 includes a supporting base 41, a plurality of sliding rails 42 (three are shown) spaced side by side on the supporting base 41, rail rods 43 respectively disposed on the sliding rails 42, two pulley sets 431 respectively disposed at upper ends of the rail rods 43, a curtain sheet 44 respectively disposed on the rail rods 43 and a pull rope 45 disposed on the supporting base 41 and driving one of the pulley set bases 43 to move, the two pulley sets 431 are disposed in the sliding rails 42; wherein, a plurality of stop blocks 432 are respectively arranged on the equal rail rods 43 in a staggered manner to be used as the stop for the movement between the sliding seats 13.

The known structure can be seen in detail, and the defects of the known structure can be easily found, mainly because the following reasons are as follows: the rail rod 43 of the known curtain structure is slidably assembled in the rail 42 of the supporting seat 41 through the pulley block 431, so that the rail 42 of the supporting seat 41 needs to be enlarged in diameter width in accordance with the size of the pulley block 431, which increases the manufacturing cost and packaging volume of the supporting seat 41, and also increases the difficulty of assembly and installation, thereby achieving the need of improvement.

In addition, referring to fig. 23 to 25, another known curtain structure is provided with a telescopic adjustable top rail, and please refer to the top rail 50, the top rail 50 has an inner rail 51 and an outer rail 52, the inner rail 51 and the outer rail 52 both form a hollow channel 511, 521, and a notch 512, 522 is formed through the bottom of the channel, and two ends of the notch 512, 522 are horizontally provided with two guide rails 513, 523 for sliding displacement of the pulley 53 carrying the curtain sheet, so as to achieve opening and closing of the curtain.

However, in the above-mentioned structure of the upper rail 50, since the inner rail 51 and the outer rail 52 are sleeved and combined with each other, the guiding rails 513, 523 are stacked to each other, and a height difference is generated at the joint of the inner rail 51 and the outer rail 52, so that when the pulley 53 is displaced between the inner rail 51 and the outer rail 52, the smoothness of sliding is affected by the height difference formed by the guiding rails 513, 523, which not only causes inconvenience in structural use, but also generates noise, and thus there is a need for improvement.

In view of the above, the present inventors have made manufacturing, development and design experience of related products for many years, and have made detailed design and careful evaluation to achieve the above objectives, and finally have a practical utility model.

SUMMERY OF THE UTILITY MODEL

The technical problem to be solved by the present invention is to provide a curtain structure in view of the above disadvantages existing in the prior art.

The curtain structure comprises: an upper rail, at least two rail rods are arranged in an inner and outer sleeve connection mode, a hollow channel is formed inside each rail rod, a notch is arranged at the bottom of the hollow channel in a penetrating mode, two vertical guide rails are arranged at the two ends of the notch in an inward bending mode, a positioning sealing cover and a pull rope sealing cover are respectively fixedly arranged at the two ends of each upper rail, a containing groove is horizontally arranged inside each positioning sealing cover, a positioning groove is symmetrically arranged on the upper end face and the lower end face of each containing groove, a winding wheel is horizontally arranged in each containing groove, the winding wheel is limited and positioned by the positioning grooves, two vertical partition plates define two containing grooves in the vertical direction inside each pull rope sealing cover, a penetrating channel is respectively arranged at the bottom of each pull rope sealing cover corresponding to the two containing grooves, a combining part is convexly arranged between the two penetrating grooves, a winding wheel is respectively arranged in each containing groove, and a central shaft transversely penetrates through the pull rope sealing cover to bolt and fix the winding wheels, a pull rope is arranged between the winding wheel and the two winding wheels, one end of the pull rope is downwards arranged through the penetrating channel of the pull rope sealing cover, and when the pull rope sealing cover is fixedly arranged at one end of the upper rail, the combining part is clamped in the groove and is screwed and pressed by the combining part matched with a locking piece and a bolt and the upper rail;

at least one sliding unit, the sliding unit has several sliding seats arranged in parallel, two side faces of the sliding seat are respectively provided with a positioning channel and a limit channel, the top end of the sliding seat is provided with a connecting ribbed slab, the bottom end is provided with a curtain sheet groove, the tail end of the positioning channel is provided with a sliding block, the thickness of the sliding block exceeds the depth of the positioning channel, the sliding block can be slidably arranged in the limit channel of the other sliding seat, the front end of the limit channel is provided with a limiting block with a buffering elastic sheet for stopping and limiting the sliding block, the tail end of the limiting block is pivoted with an opening and closing stop block which can be swung to actuate, the connecting ribbed slab is provided with at least one hole position corresponding to the arrangement sequence of the sliding seats, wherein the last sliding seat arranged in the right order has two hole positions and two limit seats, and the other sliding seats are provided with a pulley seat in sequence by utilizing the hole positions, the pulley seat is provided with pulley supports with gradually reduced width according to the arrangement position of each sliding seat, and at least one pulley block is installed on each pulley support, wherein the sliding seat arranged in a first sequence is provided with a plurality of hole positions for the pulley seat to change the fixed position, the pulley seat is provided with two pulley blocks, a through hole is arranged between the two pulley blocks for binding and traction of the pull rope, therefore, when each sliding seat of the sliding unit is in a folding state, the pulley seat and the pulley block thereof are positioned on the same straight line and are sequentially abutted, one limiting seat of the sliding seat in the last sequence is abutted against the pulley seat limiting the sliding seat in the last second sequence, and finally the sliding seat is slidably assembled into the hollow channel of the upper rail by utilizing the pulley seat, each pulley block of the pulley seat is displaced along the vertical guide rail, and the sliding seat in the last sequence is matched with a locking sheet of each limiting seat and a bolt and the vertical guide rail of the upper rail Rail screw locking and tightening;

the upper end and the lower end of each curtain sheet are respectively provided with a pressing strip part, the upper pressing strip part penetrates through the curtain sheet grooves of the sliding seats, the lower pressing strip parts at the lower ends of the curtain sheets are respectively sleeved with a lower rail, the lower rails are U-shaped, a penetrating groove is formed in the lower rails, abutting edges are respectively formed at the two outer sides of the lower rails, the top ends of the abutting edges are respectively bent towards the penetrating grooves to be provided with two limiting guide plates, the limiting guide plates are gradually concentrated towards the center to form an inclined shape, the abutting edges are slightly outwards stretched, the tail ends of the limiting guide plates are respectively bent to be provided with a blocking part, and finally the two ends of the lower rails are respectively assembled with an outer cover.

Preferably, the outer ends of the sliding blocks are provided with two symmetrical limiting wing pieces, the limiting wing pieces are clamped and limited with the limiting groove channels of the sliding seat, and the sliding blocks extend downwards to form a blocking piece to block one end of the curtain sheet groove.

Preferably, the end of the limiting block is provided with a column which is convexly arranged outside the limiting groove channel and is used for pivoting the opening and closing stop block.

The utility model discloses the efficiency of contrast prior art:

the sliding unit of the curtain structure is respectively provided with a pulley seat on each sliding seat, and pulley supports with different lengths are respectively arranged on the pulley seats corresponding to the combining sequence of each sliding seat, so that the pulley blocks and the limiting seats on the pulley seats can be positioned on the same straight line and are arranged in the groove of the upper rail, the size and the dimension required by the matching sliding unit of the upper rail can be greatly reduced, and the packaging volume is effectively reduced.

Secondly, this at least two of these railings of rail on this upper rail are with inside and outside cup joint the mode and are constituteed, make this (window) curtain on the preparation packing, can with inside this railings of one this railings retraction completely, reduce the volume of rail on by a wide margin, reduce packing and transportation cost, and two these railings provide the assembly pulley sliding displacement of pulley seat with perpendicular guide rail, between two these railings of cup jointing inside and outside, perpendicular guide rail can not produce the height drop, helps promoting assembly pulley sliding displacement's smooth and easy degree, the production of noise reduction and the probability of damage trouble have the practicality.

And thirdly, the sliding unit provides the pulley seat for changing and fixing through a plurality of hole sites on the first consequent sliding seat, so that the blocking position of the sliding seat and the positioning sealing cover can be adjusted, and further the first consequent sliding seat can extend outwards again to achieve the effect of increasing the shielding area of the curtain sheet.

Drawings

Fig. 1 is a perspective view of the present invention;

fig. 2 is an exploded view of the present invention;

FIG. 3 is an enlarged schematic view of the positioning cover of the present invention;

fig. 4 is an enlarged schematic view of the pull-cord sealing cover of the present invention;

fig. 5 is an exploded view of the sliding unit of the present invention;

fig. 6 is a combined cross-sectional view of the sliding unit of the present invention;

fig. 7 is a sectional view showing the drawing operation of the slide unit according to the present invention;

fig. 8 is a sectional view of the sliding unit and upper rail combination of the present invention;

fig. 9 is a schematic view of the pulley seat of the present invention sliding along the upper rail;

fig. 10 is a cross-sectional view of the present invention corresponding to the cross-sectional line a-a of fig. 9;

fig. 11 is another angle sectional view of the sliding unit and upper rail combination of the present invention;

fig. 12 is a cross-sectional view of the present invention taken along line B-B of fig. 11;

fig. 13 is an enlarged schematic view of a curtain sheet of the present invention;

FIG. 13-1 is a partial enlarged view of the curtain slat molding of the present invention;

FIG. 13-2 is a partial enlarged view of the lower rail of the curtain sheet of the present invention;

FIG. 14 is a cross-sectional view of the lower rail of the present invention passing through the lower end batten of the curtain sheet;

fig. 15 is a cross-sectional view of the lower rail of the present invention positioned by the outer cover;

FIG. 16 is a schematic view of the curtain sheet of the present invention with the upper end bead penetrating the groove of the curtain sheet;

FIG. 17 is a perspective view of the curtain sheet of the present invention with the upper end bead penetrating the groove of the curtain sheet;

FIG. 18 is a schematic view of the curtain sheet of the present invention being restricted by the open/close stoppers;

FIG. 19 is a perspective view of the curtain sheet of the present invention limited by the open/close stoppers;

fig. 20 is a schematic view of the present invention in an expanded state;

fig. 21 is a schematic view showing an expanded state after the adjustment of the position of the pulley seat according to the present invention;

FIG. 22 is a schematic view of a known apparatus;

FIG. 23 is an exploded view of a known telescoping headrail;

FIG. 24 is a cross-sectional view of a known telescoping headrail in use;

figure 25 is a cross-sectional view taken along line C-C of known counterpart figure 24.

Symbolic illustration in the drawings:

the utility model discloses

10, rail mounting;

11 a rail rod; 111 a hollow channel; 112 notches; 113 vertical guide rails;

12 positioning a sealing cover; 121 a receiving groove; 122 a positioning groove;

13 pulling a rope to seal the cover; 131 vertical partitions; 132 a receiving groove; 133 out of the channel; 134 a joint portion; 135 locking plate; 136 bolt;

14, winding wheel;

15, a winding wheel; 151 a mandrel;

16 pulling a rope;

20 a sliding unit;

21 a sliding seat; 211 a positioning channel; 212 a limit channel; 213 connecting ribs; 214 a shade slot; 215 hole site;

22 a slide block; 221 a limit wing panel; 222 a baffle plate;

23, a limiting block; 231 a buffer spring plate; 232 columns; 233 open and close the block;

24, a limiting seat; 241 locking plate; 242 bolts;

25, a pulley seat; 251 a pulley holder; 252 pulley blocks; 253 perforating;

30 curtain sheets;

31 a bead portion;

32 pressing the strip part;

33, lower rail; 331 through grooves; 332 against the edge; 333 limit guide plates; 334 a stopper portion;

34 an outer cover;

it is known that

40 pieces of curtains;

41 supporting a seat;

42 a slide rail;

43 rail rods; 431 pulley block; 432 a limiting block;

44 curtain sheets;

45 pulling a rope;

50, rail mounting;

51 an inner rail; 511 channel; 512 notches; 513 a guide rail;

52 an outer rail; 521 a channel; 522 a notch; 523 a guide rail;

53 pulleys.

Detailed Description

To further understand and appreciate the objects, features and functions of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings:

first, referring to fig. 1 and 2, a window curtain structure includes: an upper rail 10, at least one sliding unit 20 and a plurality of curtain sheets 30, wherein;

referring to fig. 2, 3 and 4, the upper rail 10 is provided with at least two rail rods 11 in an inner and outer sleeved manner, the rail rods 11 are formed with a hollow channel 111 therein, a notch 112 is formed through the bottom of the hollow channel 111, two ends of the notch 112 are bent inward to form two vertical guide rails 113, two ends of the upper rail 10 are respectively fixedly provided with a positioning cover 12 and a pull rope cover 13, the positioning cover 12 is horizontally provided with an accommodating groove 121 therein, the upper and lower end surfaces of the accommodating groove 121 are symmetrically provided with a positioning groove 122, the accommodating groove 121 is horizontally disposed in a reel 14, the reel 14 is limited and positioned by the positioning groove 122, the pull rope cover 13 is internally defined with two vertical partition plates 131 to form two accommodating grooves 132 in a vertical direction, the bottom of the pull rope cover 13 is provided with a penetrating channel 133 corresponding to the two accommodating grooves 132, and a combining portion 134 is convexly disposed between the penetrating channels 133, the accommodating grooves 132 are respectively provided with a winding wheel 15, a mandrel 151 transversely penetrates through the pull rope sealing cover 13 to bolt and fix the winding wheel 15, a pull rope 16 is arranged between the winding wheel 14 and the two winding wheels 15, one end of the pull rope 16 is further downwards arranged through a through groove 133 of the pull rope sealing cover 13, and when the pull rope sealing cover 13 is fixedly arranged at one end of the upper rail 10, the combining part 134 is clamped in the groove opening 112, and the combining part 134 is matched with a locking plate 135 and a bolt 136 to be screwed and locked with the upper rail 10 to be tightly pressed.

Referring to fig. 5 to 12, the sliding unit 20 has a plurality of sliding seats 21 arranged in parallel, two side surfaces of the sliding seat 21 are respectively provided with a positioning channel 211 and a limiting channel 212, the top end of the sliding seat 21 is provided with a connecting rib plate 213, the bottom end of the sliding seat is provided with a curtain plate groove 214, the tail end of the positioning channel 211 is fixedly provided with a sliding block 22, the thickness of the sliding block 22 exceeds the depth of the positioning channel 211, the outer end of the sliding block is provided with two symmetrical limiting fins 221, the sliding block 22 is slidably accommodated in the limiting channel 212 of the other sliding seat 21 and is further limited by the clamping connection of the limiting fins 221 and the limiting channel 212, the sliding block 22 further extends downwards to form a blocking piece 222 to block one end of the curtain plate groove 214, the front end of the limiting channel 212 is fixedly provided with a limiting block 23 having a buffering elastic piece 231 for blocking and limiting the sliding block 22, the tail end of the limiting block is further provided with a cylinder 232 and is convexly arranged outside the limiting channel 212, a pivotally-arranged opening/closing stop 233 capable of being swung and stopped the other end of the curtain slot 214, the connecting rib plate 213 has at least one hole 215 corresponding to the arrangement sequence of the sliding seats 21, wherein the sliding seat 21 arranged at the last position has two hole 215 and two position-limiting seats 24, and the other sliding seats 21 have a pulley seat 25 in sequence by using the hole 215, the pulley seat 25 has a pulley support 251 with a gradually reduced width according to the arrangement position of the sliding seats 21, and the pulley support 251 has at least one pulley block 252, wherein the sliding seat 21 arranged at the first position has a plurality of hole 215 for the pulley seat 25 to change the fixing position, and the pulley seat 25 has two pulley blocks 252, and a through hole 253 is arranged between the two pulley blocks 252 for the pull rope 16 to pull, thereby, when the sliding seats 21 of the sliding unit 20 are folded to form a state, the pulley seat 25 and the pulley block 252 thereof are located on the same straight line and abut against each other in sequence, as shown in fig. 2, and abut against the pulley seat 25 of the sliding seat 21 limiting the second-most-in-sequence through one of the limiting seats 24 of the sliding seat 21 limiting the second-most-in-sequence, finally the sliding seat 21 slidably assembles the limiting seat 24 and the pulley seat 25 into the hollow channel 111 of the upper rail 10, and displaces each pulley block 252 of the pulley seat 25 along the vertical guide rail 113, and the sliding seat 21 limiting the position of the last-in-sequence screws and fastens each of the two limiting seats 24 with a locking plate 241 and a bolt 242 and the vertical guide rail 113 of the upper rail 10.

Referring to fig. 13 to 19, the upper and lower ends of the curtain sheet 30 are provided with a pressing strip portion 31, 32, wherein the pressing strip portion 31 at the upper end is disposed in the curtain sheet groove 214 of the sliding seats 21, the pressing strip portion 32 at the lower end is provided with a lower rail 33, the lower rail 33 is U-shaped, a through groove 331 is formed in the inner portion, two abutting edges 332 are formed at the two outer sides, the top end of the abutting edge 332 is bent toward the through groove 331 to form two limiting guide plates 333, the limiting guide plates 333 are gradually inclined toward the center, the abutting edges 332 are slightly extended, the ends of the limiting guide plates 333 are bent to form a stopping portion 334, and finally, the two ends of the lower rail 33 are respectively provided with an outer cover 34.

The structure of the assembly is as shown in fig. 1 to 19, the rail rods 11 of the upper rail 10 are sleeved inside and outside to form a telescopic assembly, so that the upper rail can adjust two rail rods 11 to a better length according to the size of a window, each sliding seat 21 of the sliding unit 20 is slidably assembled in the limit channel 212 of another sliding seat 21 by the sliding block 22 at one end of the positioning channel 211, the front end of the limit channel 212 is fixedly provided with the stop block 23, the sliding seats 21 are respectively installed with the upper rail 10 by the limit seat 24 and the pulley seat 25, the positions of the limit seat 24 and the pulley block 252 of each pulley seat 25 are on the same straight line and are assembled in the hollow channel 111 of the upper rail 10, the limit seat 24 is abutted against the lower part of the notch 112, and respectively covers the upper ends of the two vertical guide rails 113 by a locking piece 241, and finally, the locking piece is screwed with the locking piece 241 by a bolt 242 through the limit seat 24, the last slide seat 21 is limited and positioned on the upper rail 10, the pulley block 252 is spanned at the upper ends of the two vertical guide rails 113 of the slot 112, the pull rope 16 is stretched between the rolling wheel 14 of the positioning cover 12 and the rolling wheel 15 of the pull rope cover 13, the two ends of the pull rope 16 are fixed at the through hole 253 of the pulley seat 25 on the first slide seat 21, finally, the positioning cover 12 and the pull rope cover 13 are respectively arranged at the two ends of the upper rail 10, the pull rope cover 13 is further pressed and fixed at the slot 112 of the upper rail 10 by the combination part 134, the locking plate 135 and the bolt 136, the pull rope 16 is vertically dropped from the through slot 133 of the pull rope cover 13 for the user to pull to achieve the opening and closing linkage of the slide unit 20, a curtain sheet 30 is respectively arranged in the curtain sheet groove 214 of each slide seat 21, the strip part of the curtain sheet 30 is arranged in the curtain sheet groove 214 by pressing 31, the curtain sheet 30 is limited in the curtain sheet groove 214 by the blocking piece 222 and the open-close block 233 at the two ends of each sliding seat 21, the pressing strip portion 32 at the lower end of the curtain sheet 30 is respectively sleeved with a lower rail 33, the lower rail 33 is sleeved outside the pressing strip portion 32, the pressing strip portion 32 is limited between the through groove 331 and two limit guide plates 333, an outer cover 34 is respectively covered at the two ends of each lower rail 33, the abutting edge 332 at the outer end of the lower rail 33 is pressed by the inner wall of the outer cover 34, the outer cover 34 and the lower rail 33 are abutted and fixed with each other, the two limit guide plates 333 are inwardly contracted and concentrated, the stop portion 334 at the tail end abuts against the top end of the pressing strip 32, and the lower rail 33 is surely limited and fixed at the lower end of the curtain sheet 30, thereby completing the installation of each curtain sheet 30 and forming a curtain structure.

Referring to fig. 1, 5, 6 and 20, the curtain structure uses the upper rail 10 installed on a predetermined wall surface such as a window or a French window for indoor dimming, when the curtain sheets 30 are not unfolded to be folded, the curtain sheets 30 are pushed and retracted to one side end of the upper rail 10 along with the displacement of the sliding seats 21 of the sliding unit 20, the sliding seats 21 are parallel to each other and simultaneously bring the curtain sheets 30 into a stacked state, when the curtain sheets 30 are to be unfolded to shade light, the pull rope 16 is pulled to actuate and pull out the sliding unit 20 from the first slide seat 21 along the vertical guide rail 113, and when the sliding seats 21 are pulled out, the sliding blocks 22 at the ends of the positioning channels 211 abut against the stop block 23 at the front end along the limiting channels 212 of the other sliding seat 21 to take out the other sliding seat 21 to displace, thereby sliding each sliding seat 21 out along the slot 112 one by one, and the last slide seat 21 in the right position is fixed on the upper rail 10 by the limit seat 24, and will not be pulled out any more, so that the slide unit 20 with the curtain sheets 30 forms a fully-unfolded state on the upper rail 10, thereby achieving the purpose of shading indoor light.

On the contrary, when the curtain sheet 30 to be unfolded is to be folded and transparent, the pulling rope 16 is pulled reversely to return the first slide seat 21 to move along the vertical guide rail 113 of the upper rail 10, and when the slide seat 21 slides reversely, the pulley seat 25 abuts against the pulley seat 25 above the other slide seat 21 to push the other slide seat 21 to return and slide, as shown in fig. 16, thereby pushing back and resetting each slide seat 21 one by one, achieving the centralized folding state of each curtain sheet 30, and achieving the purpose of indoor light adjustment.

Furthermore, the connecting rib plate 213 at the upper end of the first consequent sliding seat 21 of the sliding unit 20 is provided with a plurality of hole sites 215 for displacement adjustment of the pulley seat 25, since the pulley seat 25 abuts against the positioning cover 12 to form a positioning when the first consequent sliding seat 21 is further unfolded and displaced, when the fixing position of the pulley seat 25 is adjusted toward the center of the connecting rib plate 213, please refer to fig. 20 and 21, which means that the distance between the pulley seat 25 and the positioning cover 12 is increased, so that the sliding seat 21 is unfolded and slid to protrude outward beyond the range of the upper rail 10, thereby increasing the shielding area when the curtain is opened, the shielding area of the curtain is increased, such as the Y position marked in fig. 20 and 21, and the closer the difference between the fixing position of the limiting seat 24 and the outer end of the upper rail 10 is, the last consequent sliding seat 21 is also protruded beyond the upper rail 10, thereby extending the shielding area of the whole curtain, the increased difference in the covering area of the window covering, as indicated by X in fig. 11, can achieve a better covering effect even when the size of the head rail 10 is limited.

With the structure of the above embodiment, the following benefits can be obtained:

the sliding unit 20 of the curtain structure is provided with a pulley seat 25 on each sliding seat 21, and pulley supports 251 with different lengths are respectively arranged on the pulley seats 25 corresponding to the combining positions of the sliding seats 21, so that the pulley blocks 252 and the limiting seats 24 on the pulley seats 25 can be positioned on the same straight line and mounted in the notches 112 of the upper rail 10, the size and the volume required by the upper rail 10 matching with the sliding unit 20 can be greatly reduced, and the packaging volume can be effectively reduced.

Secondly, at least two rail rods 11 of the upper rail 10 are formed in an inner and outer sleeve connection mode, so that the curtain can be manufactured and packaged, one rail rod 11 can be completely retracted into the other rail rod 11, the size of the upper rail 10 is greatly reduced, the packaging and transportation cost is reduced, the pulley block 252 of the pulley seat 25 can slide and move by the aid of the two rail rods 11 through the vertical guide rail 113, and between the two rail rods 11 which are sleeved in the inner and outer portions, the vertical guide rail 113 cannot generate height difference, smoothness of sliding and moving of the pulley block 252 is improved, noise generation and failure damage probability are reduced, and the curtain has practicability.

Third, the sliding unit 20 provides the pulley seat 25 for the first proper-position sliding seat 21 to be changed and fixed through a plurality of hole sites, so that the blocking position of the sliding seat 21 and the positioning sealing cover 12 can be adjusted, and the first proper-position sliding seat 21 can extend outward again, thereby achieving the effect of increasing the shielding area of the curtain sheet 30, on the other hand, the last proper-position sliding seat 21 can also extend outward again through the change of the fixing position of the limiting seat 24 and the upper rail 10, thereby achieving the effect of increasing the shielding area of the curtain sheet, and therefore, under the condition that the size of the upper rail 10 is limited, a better using state can be obtained by adjusting the using position of the sliding seat 21, and the practicability of the structure is greatly improved.

The above description is only a preferred embodiment of the present invention, and the scope of the present invention should not be limited thereby; all the equivalent changes and modifications made according to the claims of the present invention should still fall within the scope covered by the present invention.

Claims (3)

1. A window covering construction, comprising:

an upper rail, at least two rail rods are arranged in an inner and outer sleeve connection mode, a hollow channel is formed inside each rail rod, a notch is arranged at the bottom of the hollow channel in a penetrating mode, two vertical guide rails are arranged at two ends of the notch in an inward bending mode, a positioning sealing cover and a pull rope sealing cover are respectively fixedly arranged at two ends of each upper rail, a containing groove is horizontally arranged inside each positioning sealing cover, a positioning groove is symmetrically arranged on the upper end face and the lower end face of each containing groove, a winding wheel is horizontally arranged in each containing groove, the winding wheel is limited and positioned by the aid of the positioning grooves, two vertical partition plates define two containing grooves in the vertical direction, a channel penetrates through the bottom of each pull rope sealing cover corresponding to the two containing grooves, a combining part is convexly arranged between the two penetrating grooves, a winding wheel is respectively arranged in each containing groove, and a central shaft transversely penetrates through the pull rope sealing cover to bolt and fix the winding wheels, a pull rope is arranged between the rolling wheel and the two rolling wheels, one end of the pull rope is further vertically arranged downwards through the penetrating channel of the pull rope sealing cover, and when the pull rope sealing cover is fixedly arranged at one end of the upper rail, the combining part is clamped in the groove and is screwed and pressed tightly with the upper rail through the combining part matched with a locking piece and a bolt;

at least one sliding unit, the sliding unit has several sliding seats arranged in parallel, two side surfaces of the sliding seat are respectively provided with a positioning channel and a limiting channel, the top end of the sliding seat is provided with a connecting ribbed slab, the bottom end is provided with a curtain sheet channel, the tail end of the positioning channel is provided with a sliding block, the thickness of the sliding block exceeds the depth of the positioning channel, the sliding block can be slidably arranged in the limiting channel of another sliding seat, the front end of the limiting channel is provided with a limiting block with a buffering elastic sheet for stopping and limiting the sliding block, the tail end of the limiting block is pivoted with an opening and closing stop block which can be rotated, the connecting ribbed slab is provided with at least one hole position corresponding to the arrangement sequence of the sliding seats, wherein the sliding seat arranged at the last sequential position of the hole position is provided with two limiting seats, and the other sliding seats are provided with a pulley seat in sequence, the pulley seat is provided with pulley supports with gradually reduced width in sequence according to the arrangement position of each sliding seat, and at least one pulley block is installed on each pulley support, wherein the sliding seat arranged in a first consequent position is provided with a plurality of hole positions for the pulley seat to change the fixed position, the pulley seat is provided with two pulley blocks, a through hole is arranged between the two pulley blocks for binding and traction of the pull rope, therefore, when each sliding seat of the sliding unit is in a folding state, the pulley seat and the pulley block thereof are positioned on the same straight line and are sequentially abutted, one of the limiting seats of the sliding seat in the last consequent position is abutted to limit the pulley seat of the sliding seat in the last second consequent position, and finally, the sliding seat can be slidingly assembled into the hollow channel of the upper rail by utilizing the pulley seat, and each pulley block of the pulley seat is displaced along the vertical guide rail, finally, the two limiting seats are matched with a locking piece and a bolt respectively and are screwed and tightly locked with the vertical guide rail of the upper rail by the consequent sliding seat;

the upper end and the lower end of each curtain sheet are respectively provided with a pressing strip part, the upper pressing strip part penetrates through the curtain sheet grooves of the sliding seats, the lower pressing strip parts at the lower ends are respectively sleeved with a lower rail, the lower rails are U-shaped, a penetrating groove is formed in the lower rails, abutting edges are respectively formed at two outer sides of the lower rails, the top ends of the abutting edges are respectively bent towards the penetrating grooves to be provided with two limiting guide plates, the limiting guide plates are gradually concentrated towards the center to form an inclined shape, the abutting edges are slightly outwards stretched, the tail ends of the limiting guide plates are respectively bent to be provided with a blocking part, and finally two ends of the lower rails are respectively assembled with an outer cover.

2. The window curtain structure as claimed in claim 1, wherein the outer ends of the sliding blocks are provided with two symmetrical limiting wings, and are limited by the limiting wings and the limiting groove of the sliding seat in a clamping manner, and the sliding blocks further extend downwards to form a blocking piece for blocking one end of the curtain sheet groove.

3. The window curtain structure as claimed in claim 1, wherein the end of the limiting block is provided with a post protruding out of the limiting groove for pivotally mounting the opening/closing stopper.

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