CN217269902U - Venetian blind - Google Patents

Abstract

The utility model discloses a blind, it contains first roof beam and second roof beam, and a plurality of blades are located between first roof beam and the second roof beam, and ladder rope one end extends to first roof beam, and the second roof beam is connected to the other end. The ladder rope comprises first warps and second warps, the first warps are provided with a plurality of first positions, the second warps are provided with a plurality of second positions, a plurality of third positions and a plurality of fourth positions, a plurality of supporting pieces are arranged between the first warps and the second warps, the two ends of each supporting piece are respectively connected with the first positions and the second positions, and each blade is respectively supported on each supporting piece. The plurality of restraining parts are respectively arranged at the third positions, and the plurality of limiting parts are respectively arranged at the fourth positions. The blade is provided with a through hole adjacent to the second warp, the restraint piece penetrates through the through hole to form a restraint ring, and the limiting piece penetrates through the restraint ring, so that the blade through hole is kept penetrated by at least one of the restraint piece or the limiting piece.

Description

Venetian blind

Technical Field

The utility model relates to a blind, especially one kind can prevent that the blade from by a wide margin lateral displacement or being taken out, and the good blind of blade closure when the shading state.

Background

The common venetian blinds have an upper beam, a lower beam and a plurality of blades. The upper beam may be fixed to a window frame or a wall for suspending the blade and the lower beam. The blind also comprises a ladder rope and a steering mechanism, wherein the ladder rope is provided with front warp and back warp, and a plurality of weft are arranged between the front warp and the back warp at intervals, so that the whole ladder rope is in a ladder lattice shape. The steering mechanism is arranged on the upper beam, and the upper ends of the front warp and the rear warp of the ladder rope are connected with the steering mechanism, so that the ladder rope is suspended below the upper beam. The blades are respectively and correspondingly arranged in each ladder lattice in a penetrating way and are supported by the wefts. The steering mechanism can wind or release the front warp and simultaneously reversely release or wind the rear warp, so as to incline the blades, thereby regulating and controlling the light quantity passing through the gaps among the blades.

However, the blades are simply threaded into the respective ladders of the ladder cord, and the respective ladders can only support the blades without having a function of restricting the displacement of the blades so that the blades can be freely withdrawn from the ladders. Furthermore, the ladder cord is formed by soft cord, so long as the ladder cord or the blade has a large swing, such as wind blowing or passing, or uneven force application when the blade is folded or unfolded, the blade is prone to have left and right uneven phenomenon. In addition, for the convenience of assembly, the latitude lines of the ladder ropes are mostly slightly larger than the width of the blades in the minor axis direction, when the blades are inclined, especially when the blades are in an almost vertical closed state, the downward sliding phenomenon is easily generated on the downward inclined side of the blades, but the sliding distances of the blades are often inconsistent, so that the relative positions of the blades in the corresponding ladders are different. Except causing in appearance in a jumble way, also can make and produce the light leak phenomenon easily between blade and the blade, influence the effect of shading or protection privacy.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned existing problems, an object of the present invention is to provide a blind, which solves the problems of the existing blind that the leaves are easily displaced laterally, resulting in irregularity or being pulled out from the ladder cord, and that the light is easily leaked between the leaves when the leaves are closed.

According to the utility model discloses an object, provide a blind, contain a first roof beam, a second roof beam, a plurality of blades, a steering mechanism and a ladder rope. The second beam is arranged below the first beam, the plurality of blades are arranged between the first beam and the second beam, the plurality of blades comprise a first blade, and the steering mechanism is arranged on the first beam. The ladder rope comprises a first warp, a second warp, a plurality of supporting pieces, a plurality of restraining pieces and a plurality of limiting pieces. The first warp has a plurality of first positions, and the distance between the first positions is a predetermined distance. The second warps and the first warps are arranged in a spaced and approximately parallel mode, the second warps are provided with a plurality of second positions, a plurality of third positions and a plurality of fourth positions, the space between the second positions is a preset distance, the second positions are arranged corresponding to the first positions respectively, the third positions are arranged adjacent to the second positions respectively, the second positions and the fourth positions are arranged in a staggered mode, and the third positions and the fourth positions are arranged in a staggered mode. The supporting pieces are arranged between the first warps and the second warps, one end of each supporting piece is correspondingly arranged at each first position of the first warps, and the other end of each supporting piece is correspondingly arranged at each second position of the second warps. The plurality of restraining elements are respectively and correspondingly arranged at each third position of the second warp thread, and the plurality of restraining elements comprise a first restraining element. The plurality of limiting pieces are respectively and correspondingly arranged at the fourth positions of the second warp, and the plurality of limiting pieces comprise a first limiting piece. The first ends of the first warps and the first ends of the second warps are respectively located on the first beams, so that the ladder rope is suspended below the first beams, and the second ends of the first warps and the second ends of the second warps are respectively provided with the second beams. Each blade is arranged between the first warp and the second warp and correspondingly bears against each supporting piece. When the ladder rope is driven by the steering mechanism to enable the first warp threads and the second warp threads to move relatively, the angle of the support pieces is changed along with the relative movement of the first warp threads and the second warp threads, and meanwhile, the blades are driven to change the angle. The first blade is provided with a first through hole adjacent to the second longitude line, the first restraint piece passes through the first through hole to form a first restraint ring, and the first limit piece passes through the first restraint ring, so that the first through hole of the first blade is kept penetrated by at least one of the first restraint piece or the first limit piece.

In one embodiment, the plurality of supporting members includes a first supporting member and a second supporting member, and the first supporting member is closer to the first beam than the second supporting member. The plurality of blades further includes a second blade, wherein the first blade is supported by the first support member, and the second blade is supported by the second support member. The plurality of constraining members further include a second constraining member disposed adjacent to the second supporting member, and the plurality of limiting members further include a second limiting member. On the second warp, a third position of the first restraint member is arranged and is closer to the first beam than a second position of the first support member, a fourth position of the first restraint member is arranged and is closer to the first beam than the third position of the first restraint member, a third position of the second restraint member is arranged and is closer to the first beam than the second position of the second support member, and a fourth position of the second restraint member is arranged and is closer to the first beam than the third position of the second restraint member. The second blade is provided with a second through hole adjacent to the second warp, the first limiting piece penetrates through the first limiting ring to form a first limiting ring, the second limiting piece penetrates through the second through hole to form a second limiting ring, and the second limiting piece penetrates through the first limiting ring and then penetrates through the second limiting ring.

In one embodiment, the plurality of supporting members includes a first supporting member and a second supporting member, and the first supporting member is closer to the first beam than the second supporting member. The plurality of blades further includes a second blade, wherein the first blade is supported by the first support member, and the second blade is supported by the second support member. The plurality of constraining members further include a second constraining member disposed adjacent to the second supporting member, and the plurality of limiting members further include a second limiting member. On the second warp, the fourth position of the first limiting piece is arranged and is closer to the first beam than the second position of the first supporting piece, the second position of the first supporting piece is arranged and is closer to the first beam than the third position of the first restraining piece, the fourth position of the second limiting piece is arranged and is closer to the first beam than the second position of the second supporting piece, and the second position of the second supporting piece is arranged and is closer to the first beam than the third position of the second restraining piece. The second blade is provided with a second through hole adjacent to the second warp, the first limiting part penetrates through the first limiting ring to form a first limiting ring, the second limiting part penetrates through the second through hole to form a second limiting ring, and the second limiting part penetrates through the first limiting ring and then penetrates through the second limiting ring.

In one embodiment, the plurality of supporting members includes a first supporting member and a second supporting member, and the first supporting member is closer to the first beam than the second supporting member. The plurality of blades further includes a second blade, wherein the first blade is supported by the first support member, and the second blade is supported by the second support member. The plurality of constraining members further include a second constraining member disposed adjacent to the second supporting member, and the plurality of limiting members further include a second limiting member. On the second warp, the third position of the first restraint part is arranged and is closer to the first beam than the second position of the first support part, the second position of the first support part is arranged and is closer to the first beam than the fourth position of the first limit part, the third position of the second restraint part is arranged and is closer to the first beam than the second position of the second support part, and the second position of the second support part is arranged and is closer to the first beam than the fourth position of the second limit part. The second blade is provided with a second through hole near the second warp, the second constraint piece penetrates through the second through hole to form a second constraint ring, the second limit piece penetrates through the second constraint ring to form a second limit ring, and the first limit piece penetrates through the first constraint ring after penetrating through the second limit ring.

In one embodiment, the plurality of supporting members includes a first supporting member and a second supporting member, and the first supporting member is closer to the first beam than the second supporting member. The plurality of blades further includes a second blade, wherein the first blade is supported by the first support member, and the second blade is supported by the second support member. The plurality of constraining members further include a second constraining member disposed adjacent to the second supporting member, and the plurality of limiting members further include a second limiting member. On the second warp, the second position of the first supporting piece is arranged and is closer to the first beam than the third position of the first restraining piece, the third position of the first restraining piece is arranged and is closer to the first beam than the fourth position of the first limiting piece, the second position of the second supporting piece is arranged and is closer to the first beam than the third position of the second restraining piece, and the third position of the second restraining piece is arranged and is closer to the first beam than the fourth position of the second limiting piece. The second blade is provided with a second through hole adjacent to the second warp, the second constraint piece penetrates through the second through hole to form a second constraint ring, the second limiting piece penetrates through the second constraint ring to form a second limiting ring, and the first limiting piece penetrates through the second limiting ring and then penetrates through the first constraint ring.

In one embodiment, the plurality of supporting members includes a top supporting member, which is the supporting member closest to the first beam, and the top supporting member includes two adjusting units. The plurality of blades includes a top blade disposed between the two adjusting units.

In an embodiment, the top blade has at least one recess corresponding to the first meridian or the second meridian.

In another embodiment, the present invention further comprises a lifting mechanism, a pulling rope and a plurality of positioning members, wherein each positioning member is disposed on at least one of the first warp and the second warp at intervals, the lifting mechanism is disposed on one of the first beam and the second beam, the first end of the pulling rope is connected to the lifting mechanism, the second end of the pulling rope extends to the other of the first beam and the second beam, and the portion of the pulling rope between the first beam and the second beam passes through at least one positioning member of the plurality of positioning members, and the lifting mechanism is configured to release or collect the pulling rope along with the change of the distance between the first beam and the second beam.

In an embodiment, each of the constraining members and each of the position-limiting members are annular, and a circumference of the constraining member is smaller than a circumference of the position-limiting member.

In an embodiment, each of the constraining members and each of the positioning members are annular, and a circumference of the positioning member is smaller than a circumference of the constraining member.

In an embodiment, the lifting mechanism is disposed on the second beam, and the pull rope is connected to the first beam.

In an embodiment, the lifting mechanism is disposed on the second beam, and the pull rope is connected to the steering mechanism.

In an embodiment, the lifting mechanism is disposed on the first beam, and the second end of the pull rope is fixed to the second beam.

In another embodiment, the blind further includes an anchor disposed on the second beam, and the first warp and the second warp are connected to the second beam via the anchor.

In an embodiment, the plurality of limiting members includes a fixed limiting member, which is the limiting member closest to the second beam among the plurality of limiting members, and the fixed limiting member is connected to the anchor member along with the second end of the second warp.

In an embodiment, the distance between the third positions is the predetermined distance.

In an embodiment, the distance between the fourth positions is the predetermined distance.

In an embodiment, each of the position-limiting members is ring-shaped, and a circumference of the position-limiting member is greater than twice the predetermined distance.

In an embodiment, the plurality of constraining members are integrally formed with the second warp thread.

In an embodiment, the plurality of position-limiting elements are integrally formed with the second warp.

Bear the upper limit, according to the utility model discloses a blind, it can have one or more following advantages:

(1) by arranging a plurality of restraining parts corresponding to the blades on the ladder rope, passing through the through holes of the blades through the restraining parts and passing through the adjacent limiting parts, the through holes of the blades are sequentially and annularly hooked, so that the restraining parts or the limiting parts can be kept to pass through the through holes of the blades, and the transverse movement of the blades is limited. The blades can be prevented from being transversely pulled out from the ladder rope, and the blades can be prevented from moving too far when wind blows or people pass, so that the blades of the blind can be ensured to be regularly arranged, and the problem of disordered appearance is solved.

(2) In addition, by means of the configuration of the restraining part and the limiting part, the downward sliding distance of the blades can be limited when the blades are closed obliquely, the consistent width of the stacked blades is ensured, the closing of the blades is good, and the phenomenon of light leakage is avoided.

(3) Furthermore, the position of the lifting pull rope of the blind can be limited by the configuration of the positioning piece, so that the lifting pull rope is close to the warp of the ladder rope to present an integral feeling, and the visual effect that the blind appears a disorder due to too many rope lines on the appearance is reduced. Meanwhile, in the process of retracting the lower beam, the positioning piece does not influence the up-and-down movement of the lifting pull rope, but when the lifting pull rope is pulled in the horizontal direction, the positioning piece can provide resistance for the lifting pull rope, so that the lifting pull rope is not easy to pull out, a rope loop cannot be formed, and the safety of the blind is improved.

The present invention will be described in detail with reference to the accompanying drawings and specific embodiments, but the present invention is not limited thereto.

Drawings

Fig. 1 is a perspective view of a first embodiment of the blind of the present invention in a fully extended state and in a transparent state.

Fig. 2 is a partial perspective view of the blind.

Fig. 3 is a schematic view of the ladder cord of the blind of fig. 1.

FIG. 4 is a left side view of the blind removal lever of FIG. 1.

FIG. 5 is an enlarged view of the blind of FIG. 4 with the first beam and the diverter module removed.

Fig. 6 is a partially enlarged perspective view of the lower left side of the blind of fig. 1.

Fig. 7 is a perspective view of the blind of fig. 1 in a fully extended state and with the blind body in a closed state.

Fig. 8 is a left side view of fig. 7.

Fig. 9 is a partially enlarged view of fig. 8.

Fig. 10 is a perspective view of a second embodiment of the blind of the present invention in a fully extended state with the blind body in a transparent state.

FIG. 11 is a perspective view of the blind of FIG. 10 from another perspective.

FIG. 12 is a partial perspective view of the blind of FIG. 10.

FIG. 13 is a schematic view of the ladder cord of the blind of FIG. 10.

FIG. 14 is a left side view of the blind removal lever of FIG. 10.

FIG. 15 is an enlarged partial view of the blind of FIG. 14 with the first beam and the diverter module removed.

Fig. 16 is a partially enlarged perspective view of the ladder cord and the pull cord of fig. 10 connected to the first drum.

Fig. 17 is an enlarged partial perspective view of the lower left side of the blind of fig. 10.

FIG. 18 is a perspective view of the blind of FIG. 10 in a fully retracted state.

FIG. 19 is a perspective view of the blind of FIG. 10 in a fully extended position with the blind body in a closed position.

Fig. 20 is a left side view of fig. 19.

Fig. 21 is a partially enlarged view of fig. 20.

FIG. 22 is a partial left side view of the blind of FIG. 10 with the ladder cord threaded around another embodiment of the vanes.

FIG. 23 is a partial left side view of the embodiment of FIG. 22 with the vanes in a closed position.

FIG. 24 is a schematic view of another example structure of the ladder cord of the blind of FIG. 10.

FIG. 25 is a partial left side view of the ladder cord structure of FIG. 24 threaded around a blade.

FIG. 26 is a partial left side view of the ladder cord structure of FIG. 25 with the vanes in a closed position.

FIG. 27 is a partial left side view of the ladder cord structure of FIG. 24 with another embodiment of a reeved vane.

FIG. 28 is a partial left side view of the ladder cord structure of FIG. 27 with the vanes in a closed position.

FIG. 29 is a schematic view of another embodiment of the ladder cord of the blind of FIG. 10.

FIG. 30 is a partial left side view of the ladder cord structure of FIG. 29 threaded around a blade.

FIG. 31 is a partial left side view of the ladder cord structure of FIG. 30 with the vanes in a closed position.

FIG. 32 is a partial left side view of the ladder cord structure of FIG. 29 threaded around another embodiment of a blade.

FIG. 33 is a partial left side view of the ladder cord structure of FIG. 32 with the vanes in a closed position.

FIG. 34 is a schematic view of another embodiment of a ladder cord of the blind of FIG. 10.

FIG. 35 is a partial left side view of the ladder cord structure of FIG. 34 threaded around a blade.

FIG. 36 is a partial left side view of the ladder cord structure of FIG. 35 with the vanes in a closed position.

Wherein, the reference numbers:

1 shutter blind

10 first beam

20 curtain body

2A tip vane 21 first vane 22 second vane

23 third blade 2n last blade

2AO recess

21O, 22O, 2nO through hole

30 second beam

32 anchoring element

322 first clamping block 322S first clamping groove

The second clamping slot of the second 324S

34 anchoring element

40 steering mechanism

42 first drum 44 second drum 46 steering module

48 shaft 462 operating lever

50 ladder rope

52 first warp

P1A, P11, P12, P13, P1n first position

54 second warp yarn

P2A, P21, P22, P23, P2n second position

Third positions of P31, P32, P33 and P3n

Fourth position of P41, P42, P43, P4n, P4n +1

D predetermined distance

56A tip support

56A1, 56A2 adjusting unit

561 first support 562 second support 563 third support

56n last support

581 first restraint 582 second restraint 583 third restraint

58n last restraint

581 'first confinement ring 582' second confinement ring

58 n' last restraint loop

601 a first limiting member 602, a second limiting member 603, and a third limiting member

60n final limit piece 60n +1 fixed limit piece

601 'first limit ring loop 602' second limit ring loop

2 shutter

10 first beam

20 curtain body

2A tip vane 21 first vane 22 second vane

23 third blade 2n last blade

2AO recess

21O, 22O, 2nO through hole

30 second beam

32 anchoring element

322 first clamping block 322S first clamping groove

324 second clamping block 324S second clamping groove

34 anchoring element

40 steering mechanism

42 first drum 44 second drum 46 steering module

48 shaft 462 operating lever

70 ladder rope

72 first warp

P1A, P11, P12, P13, P1n first position

74 second warp

P2A, P21, P22, P23, P2n second position

Third positions of P31, P32, P33 and P3n

Fourth position of P41, P42, P43, P4n, P4n +1

82 first positioning member

84 second positioning element

D predetermined distance

76A tip support

76A1, 76A2 adjusting unit

761 first support 762 second support

763 third support 76n last support

781 first restraint 782 second restraint 783 third restraint

78n final restraint

801 first limit piece 802, second limit piece 803, third limit piece

80n Final Limit 80n +1 fixed Limit

92 first pull cord

94 second pull cord

100 lifting mechanism

102 drive wheel 104 store spring 106 spring

108 winding wheel 110 winding wheel

200 ladder rope

21 first blade 22 second blade

21O, 22O through hole

202 first warp

P11, P12, P13, P1n first position

204 second warp

P21, P22, P23, P2n second position

Third positions of P31, P32, P33 and P3n

Fourth position of P41, P42, P43, P4n, P4n +1

2061 first support 2062 second support 2063 third support

206n last support

2081 first 2082 second 2083 third 2082

208n final restraint

2081 'first restraining loop 2082' second restraining loop

2101 first stop element 2102, second stop element 2103 and third stop element

210n Final Limit 210n +1 fixed Limit

2101 'first confinement rings 2102' second confinement rings

212 first positioning member

214 second positioning member

300 ladder rope

21 first blade 22 second blade

21O, 22O through hole

302 first warp

P11, P12, P13, P1n first position

304 second warp

P21, P22, P23, P2n second position

Third positions of P31, P32, P33 and P3n

Fourth position of P41, P42, P43, P4n, P4n +1

3061 first support 3062 second support 3063 third support

306n final support

3081 first 3082 second 3083 third restrainer

308n last restraint

3081 'first confinement rings 3082' second confinement rings

3101 first stop 3102 second stop 3103 third stop

310n Final Limit 310n +1 fixed Limit

3101 'first stop collar 3102' second stop collar

312 first positioning member

314 second positioning member

400 ladder rope

21 first blade 22 second blade

21O, 22O through hole

402 first warp

P11, P12, P13, P1n first position

404 second warp

P21, P22, P23, P2n second position

Third positions of P31, P32, P33 and P3n

Fourth position of P41, P42, P43, P4n, P4n +1

4061 first support 4062 second support 4063 third support

406n last support

4081A first restraint 4082 a second restraint 4083 a third restraint

408n last restraint

4081 'first confinement ring 4082' second confinement ring

4101 first limit part 4102 second limit part 4103 third limit part

410n Final Limit 410n +1 fixed Limit

4101 'first limit loop 4102' second limit loop

412 first positioning element

414 second positioning member

Detailed Description

Referring to fig. 1 to 6, a blind according to a first embodiment of the present invention is disclosed. As shown in fig. 1 and 2, the blind 1 includes a first rail 10, a blind body 20, a second rail 30, a steering mechanism 40, and a ladder cord 50, and the first rail 10 may be fixed to a window frame or a wall for hanging the blind body 20 and the second rail 30. The curtain body 20 includes a plurality of blades, which are defined as a top blade 2A, a first blade 21, a second blade 22, a third blade 23 … … and a last blade 2n from top to bottom in sequence in the present embodiment, wherein the top blade 2A is closest to the first beam 10, and the last blade 2n is closest to the second beam 30. The first beam 10 has a cavity therein, and the steering mechanism 40 is disposed in the cavity of the first beam 10, wherein the steering mechanism 40 includes a first drum 42, a second drum 44, a steering module 46 and a shaft 48, the first drum 42 and the second drum 44 are respectively disposed on the left and right sides of the first beam 10, the steering module 46 is disposed on the left side of the first drum 42, and the shaft 48 passes through the steering module 46, the first drum 42 and the second drum 44, so that the steering module 46 can drive the first drum 42 and the second drum 44 to rotate synchronously via the shaft 48. In the present embodiment, the number of the ladder cords 50 is two, and the upper ends of the ladder cords 50 are connected to the first drums 42 and the second drums 44, respectively, so that the ladder cords 50 are suspended below the first beam 10.

The structure of the two-ladder rope 50 of the present embodiment may be configured to be the same or similar. As shown in fig. 3, the ladder cord 50 has a first warp thread 52, a second warp thread 54, a plurality of supporting members, a plurality of restraining members, and a plurality of restraining members. The first warp yarn 52 and the second warp yarn 54 are substantially parallel, the first warp yarn 52 defines a plurality of first positions, which are first positions P1A, P11, P12 and P13 … P1n in sequence from top to bottom, and the first positions are separated by a predetermined distance D. The second longitude line 54 defines a plurality of second positions, which are sequentially the second positions P2A, P21, P22, P23 … and P2n from top to bottom, and the second positions are also separated by a predetermined distance D. The plurality of supporting members are defined as a top supporting member 56A, a first supporting member 561, a second supporting member 562, a third supporting member 563 … … and a last supporting member 56n in sequence from top to bottom, two ends of the top supporting member 56A are respectively disposed at a first position P1A and a second position P2A, two ends of the first supporting member 561 are respectively disposed at a first position P11 and a second position P21, two ends of the second supporting member 562 are respectively disposed at a first position P12 and a second position P22, two ends of the third supporting member 563 are respectively disposed at a first position P13 and a second position P23, and so on, until two ends of the last supporting member 56n are respectively disposed at a first position P1n and a second position P2 n. The second meridian 54 further defines a plurality of third positions and a plurality of fourth positions, the third positions are sequentially from top to bottom the third positions P31, P32, P33 … P3n, and the third positions are also spaced apart by a predetermined distance D. The fourth positions are sequentially the fourth positions P41, P42, P43 … P4n and P4n +1 from top to bottom, and the fourth positions are also spaced apart by the predetermined distance D.

In the embodiment, the second position, the third position and the fourth position on the second warp yarn 54 are not overlapped, and are the second position P2A, the fourth position P41, the third position P31, the second position P21, the fourth position P42, the third position P32 and the second position P22 in sequence from top to bottom, and so on until the fourth position P4n, the third position P3n, the second position P2n and finally the fourth position P4n + 1. The plurality of constraining pieces are respectively formed by approximately doubling a rope, and each constraining piece is correspondingly arranged at each third position. The constraining members are defined as a first constraining member 581, a second constraining member 582, a third constraining member 583 … … and a final constraining member 58n from top to bottom. The first constraining member 581 is disposed at the third position P31, the second constraining member 582 is disposed at the third position P32, the third constraining member 583 is disposed at the third position P33, and so on, and finally the constraining member 58n is disposed at the third position P3 n. The limiting members are respectively formed by approximately doubling a rope, and each limiting member is correspondingly arranged at each fourth position. The position-limiting members are defined as a first position-limiting member 601, a second position-limiting member 602, a third position-limiting member 603 … …, a last position-limiting member 60n, and a fixed position-limiting member 60n +1 from top to bottom. The first limiting member 601 is disposed at the fourth position P41, the second limiting member 602 is disposed at the fourth position P42, the third limiting member 603 is disposed at the fourth position P43, and so on, the last limiting member 60n is disposed at the fourth position P4n, and the fixed limiting member 60n +1 is disposed at the fourth position P4n + 1.

The structure and arrangement of the ladder cord 50 will be further explained by taking the ladder cord 50 and the first drum 42 on the left side of fig. 1 as an example. As shown in fig. 2 to 5, in the embodiment, a first end of the first warp 52 and a first end of the second warp 54 are respectively connected to the first drum 42, a section of the first warp 52 and the second warp 54 between the first beam 10 and the second beam 30 is substantially parallel (for example, the first warp 52 and the second warp 54 near the first beam 10 and/or the second beam 30 may be in a non-parallel state), the first warp 52 passes through the front side of the curtain 20, the second warp 54 passes through the rear side of the curtain 20, the top end support 56A includes two adjusting units 56A1, 56A2, wherein the adjusting unit 56A1 is at the bottom, the adjusting unit 56A2 is at the top, and the top end blade 2A is disposed between the two adjusting units 56A1, 56A 2. The first blade 21 bears against the first support 561, the second blade 22 bears against the second support 562, the third blade 23 bears against the third support 563, and so on, and the last blade 2n bears against the last support 56 n. As shown in FIG. 4, when the first position P1A of the first warp yarn 52 is aligned with the second position P2A of the second warp yarn 54, the remaining first positions P11-P1 n and the remaining second positions P21-P2 n are also aligned, respectively, so that the supporting members 56A, 561-56 n are in a horizontal state, and the blades 2A, 21-2 n supported thereon are also in a horizontal state. In other words, the inclination angle of the supports 56A, 561-56 n determines the inclination angle of the blades 2A, 21-2 n against which they rest.

Referring to fig. 1 to 6, in the present embodiment, as shown in fig. 2, the top blade 2A is provided with a concave portion 2AO at a position corresponding to the first longitude line 52 and the second longitude line 54, respectively, so that the first longitude line 52 and the second longitude line 54 passing through can be sunk into the corresponding concave portion 2AO (as shown in fig. 2). As shown in fig. 5 and 6, the first blade 21 has a through hole 21O on the side close to the second meridian 54, the second blade 22 has a through hole 22O on the side close to the second meridian 54, and so on, and finally the blade 2n has a through hole 2nO on the side close to the second meridian 54. The first strap 581 passes through the through hole 21O of the first blade 21 to form a first strap ring 581 ', the second strap 582 passes through the through hole 22O of the second blade 22 to form a second strap ring 582 ', and so on, and the last strap 58n passes through the through hole 2n of the last blade 2n to form a last strap ring 58n '. The first limiting member 601 located above the first blade 21 passes through the first limiting ring 581 ' to form a first limiting ring 601 ', the second limiting member 602 located between the first blade 21 and the second blade 22 passes through the first limiting ring 601 ', then passes through the second limiting ring 582 ' to form a second limiting ring 602 ', and so on, each limiting member passes through each blade to form a limiting ring, and the limiting member located above the blade passes through the limiting ring formed by the previous limiting member and then passes through the limiting ring below until the last limiting member 60n passes through the last limiting ring 58n ' to form a last limiting ring 60n ', and then the fixed limiting member 60n +1 passes through the last limiting ring 60n ' to form a fixed limiting ring 60n +1 '.

Finally, as shown in fig. 4 and 6, the second ends of the first warp threads 52, the second ends of the second warp threads 54 and the fixing limit loops 60n + 1' respectively extend toward the second beam 30 and are combined with the anchoring elements 32 in the second beam 30. In the present embodiment, the anchor 32 includes a first latch 322 and a second latch 324, the first latch 322 has a first latching groove 322S, and the second latch 324 has a second latching groove 324S. The anchor 32 has a channel, and the second end of the first warp thread 52 extends into the anchor 32 and then is exposed from one side of the first latch 322, and then surrounds the first latch 322 and then is inserted into and fastened to the first latch slot 322S. The second end of the second meridian 54 extends into the anchor 32, then is exposed from one side of the second block 324, and then surrounds the second block 324 and then is embedded in and fastened to the second fastening groove 324S. After the fixing limit ring 60n + 1' extends to the anchor 32, it is directly sleeved on the second latch 324. Thereby making it impossible to separate the second end of the first warp thread 52, the second end of the second warp thread 54 and the dead end ring 60n + 1' from the second beam 30. To supplement this, as shown in fig. 1, the second end of the ladder cord 50 on the right is connected to the anchor 34 on the right of the second beam 30. The anchoring element 34 is symmetrical to the anchoring element 32, and the first warp thread 52, the second warp thread 54 and the fixing limit loop 60n + 1' of the right ladder cord 50 are connected to the anchoring element 34 in the same manner as the left ladder cord 50 is connected to the anchoring element 32. In another embodiment, the second end of the first warp yarn 52, the second end of the second warp yarn 54 and the fixing limit loop 60n +1 ' may be connected to the second beam 30 in other manners, for example, holes are formed in the second beam 30, and the second end of the first warp yarn 52, the second end of the second warp yarn 54 and the fixing limit loop 60n +1 ' are fixed by knotting after passing through the holes, so that the second end of the first warp yarn 52, the second end of the second warp yarn 54 and the fixing limit loop 60n +1 ' can also be fixed to the second beam 30. Alternatively, only the first warp threads 52 and the second warp threads 54 may be fixed to the second beam 30, but the final stopper loop 60n may be restricted by fixing the final stopper loop 60n + 1' to the second warp threads 54, so that the final restraint member 58n is restricted in the through hole 2nO of the final blade 2 n.

In the present embodiment, the first warp 52, the second warp 54, the supporting members 561 to 56n, the constraining members 581 to 58n, and the limiting members 601 to 60n +1 of the ladder rope 50 are integrally formed during the weaving process, so that the second position, the third position, and the fourth position are not overlapped. In another embodiment, the supporting members 561 to 56n, the constraining members 581 to 58n, and the limiting members 601 to 60n +1 may also be independently formed rings, and respectively combined with the first warp 52 and the second warp 54, for example, by sewing or bonding, so that the supporting members 561 to 56n, the constraining members 581 to 58n, and the limiting members 601 to 60n +1 are fixed on the first warp 52 and the second warp 54. The supporting member, the restraining member and the limiting member may also be disposed at the same position of the second warp, but the length of the restraining member still needs to be smaller than that of the limiting member, so as to limit the blade from substantial lateral displacement after the blade is wound. In addition, in the present embodiment, each of the constraining members is a loop formed by folding a string in half, but not limited thereto, each of the constraining members may be formed of a complete string loop and connected to the second warp 54 at any position on the string loop. In the present embodiment, each limiting element is a loop formed by folding a rope segment in half, but not limited to this, each limiting element may also be formed by a complete rope loop, and connected to the second warp 54 at any position on the rope loop. In addition, in the embodiment, the circumference of the constraining member only needs to be enough to allow the constraining member to pass through the through hole of the blade to form a constraining ring through which the limiting member can pass, and when the supporting member changes the inclination angle, the blade does not change the angle along with the inclination of the supporting member. The limiting member needs to be slightly larger than twice the predetermined distance D to be able to hook the restraining ring and the limiting ring without affecting the distance between the supporting members (i.e., between the blades), so the circumference of the restraining member is significantly smaller than that of the limiting member. Furthermore, the second warp 54 passes through the rear side of the curtain 20 in this embodiment, but not limited to this, the second warp 54 and the first warp 52 may be reversed. Or through holes are formed in the positions, adjacent to the first longitude line 52 and the second longitude line 54, of the blades 21-2 n, and both the first longitude line 52 and the second longitude line 54 can be provided with through holes of the blades corresponding to the restraining parts and the limiting parts.

With the above configuration, the blades 21 to 2n are restricted by the restricting members 581 to 58n in cooperation with the restricting members 601 to 60n, respectively, and even if the restricting members are intentionally pulled out from the through holes of the blades, the restricting members inserted in the restricting members are brought into the through holes, so that the restricting members or the restricting members are constantly kept in the through holes 21O to 2nO of the blades 21 to 2n to pass through, and therefore the blades cannot be pulled out from the ladder rope 50. In addition, since the circumferential length of the constraining member is small, there is not much space for deformation and deflection of the margin in the lateral direction, so that the blades 21 to 2n cannot be moved laterally largely. It should be noted that, in the present embodiment, the length of the minor axis direction of the first beam 10 of the blind 1 is smaller than the length of the minor axis direction of the vanes 20A, 21-2 n, and the upper ends of the two sets of ladder cords 50 are connected to the first drum 42 and the second drum 44 disposed in the first beam 10, respectively, so that the first warp 52 and the second warp 54 will assume an inward-inclined angle after passing through the vane 2A, so that the vane 2A closest to the first beam 10 bears a larger pressure from the first warp 52 and the second warp 54. Therefore, the concave portions 2AO corresponding to the first meridian 52 and the second meridian 54 as shown in fig. 2 are provided on both sides of the vane 2A to blunt the inward-inclined angles of the first meridian 52 and the second meridian 54, so as to reduce the influence of the pressure on the vane 2A, and the first meridian 52 and the second meridian 54 embedded in the concave portion 2AO can make the vane 2A not easily move laterally. Meanwhile, the two adjustment units 56A1, 56A2 of the support 56A are used to make the blade 2A disposed between the two adjustment units 56A1, 56A2 tilt synchronously with the tilt of the support, and the blade will not flip to an angle different from the other blades 21-2 n because of no restriction of the restriction member.

Further explaining the operation of the blind of the present invention. Referring to fig. 1, 2 and 4, the blind 1 reveals that the second beam 30 is positioned furthest from the first beam 10, defined herein as fully extended. When the blind 1 is in the fully extended state, the first warp threads 52 and the second warp threads 54 between the first beams 10 and the second beams 30 are in a state of being substantially parallel to each other and extending vertically, respectively. As shown in FIG. 4, the first positions P1A, P11-P1 n on the first meridian 52 and the second positions P2A, P21-P2 n on the second meridian 54 are opposite to each other in height, so that the supporting members 56A, 561-56 n are horizontally arranged at intervals, the blades 2A, 21-2 n supported on the supporting members are also horizontally arranged at intervals, and the gaps between the blades are maximum, which is defined as a light-transmitting state.

Referring to fig. 2, 7 to 9, in the present embodiment, the steering module 46 further includes an operating rod 462 exposed to the first beam 10 for a user to drive the steering module 46. When the user wants to change the light transmittance of the blind 1, the operating rod 462 is rotated to drive the turning module 46 to rotate the shaft 48, and the rotation of the shaft 48 drives the first drum 42 and the second drum 44 to rotate synchronously and in the same direction, which in turn causes the ladder cords 50 connected to the first drum 42 and the second drum 44 to change states. Taking the ladder cord 50 on the left side of fig. 2 as an example, when the user rotates the lever 462 to rotate the shaft 48, for example, when the shaft 48 is rotated in a clockwise direction in the view of fig. 8, the first drum 42 discharges a portion of the first warp 52, and simultaneously takes up part of the second warps 54, so that the length of the first warps 52 between the first and second beams 10 and 30 is increased, and the length of the second warps 54 between the first and second beams 10 and 30 is decreased, so that the support members 56A, 561~56n between the first warp 52 and the second warp 54 are inclined with low front and high back (in terms of the angle of the user facing the blind 1), and drives the blades 2A, 21-2 n thereon to tilt synchronously until the blades 2A, 21-2 n are in a state of being overlapped with each other at the edges and having no gap between the blades as shown in FIG. 8, which is defined as a closed state. As shown in fig. 8 and 9, the blade 2A is sandwiched between the two single adjustment elements 56a1, 56a2, the first constraining member 581 passed through the through hole 21O suspends the blade 21, the first constraining member 601 is bent downward from the gap between the bottom surface of the blade 2A and the second warp 54, and then passed through the first loop 581 ', the gap between the bottom surface of the first blade 21 and the second warp 54 forms a first constraining loop 601', and so on. The perimeter of each restraint part 581-58 n is small, when the blades 21-2 n are almost vertical, each restraint part 581-58 n can respectively hang each blade 21-2 n to play a role in positioning each blade 21-2 n, so that the downward sliding movement and the transverse movement of each blade 21-2 n are avoided, the overlapping range of adjacent blades is approximately equal, and the adjacent blades can be aligned in the left and right directions. In addition, the stoppers 601 to 60n +1 are hidden on the back surfaces of the blades 2A and 21 to 25 and are substantially stretched without much margin, so that the closing of the blades 2A and 21 to 2n is not affected, light can be effectively blocked, and privacy can be protected. The operating principle and configuration of the steering mechanism 40 for adjusting the light transmittance of the curtain 20 between the light transmittance state and the closed state are well known in the art and will not be described herein. In addition, the number of the ladder cords 50 in the present embodiment is two, but not limited thereto. The number of the ladder cords 50 can be adjusted according to the requirement, for example, the wider the width of the blind 1 is, the more the number of the ladder cords 50 is required. In the present embodiment, the first end of the first warp yarn 52 and the first end of the second warp yarn 54 are both connected to the first drum 42 and the second drum 44, in another embodiment, only one of the first end of the first warp yarn and the first end of the second warp yarn may be connected to the first drum and the second drum, and the other one is directly connected to the first beam, and also when the first drum and the second drum rotate, the first warp yarn and the second warp yarn are driven to move relatively, so that the support member tilts to change the angle of the blade.

Referring to fig. 10 to 16, a blind according to a second embodiment of the present invention is disclosed. As shown in fig. 10 to 12, the blind 2 includes a first rail 10, a blind body 20, a second rail 30, a steering mechanism 40, a ladder cord 70, a first cord 92, a second cord 94, and a lift mechanism 100. Similar to the previous embodiments, the first beam 10 may be fixed to a window frame or wall for hanging the curtain 20 and the second beam 30. The curtain body 20 includes a plurality of blades, which are defined as a top blade 2A, a first blade 21, a second blade 22, a third blade 23 … … and a last blade 2n from top to bottom in sequence in the present embodiment, wherein the top blade 2A is closest to the first beam 10, and the last blade 2n is closest to the second beam 30. The first beam 10 has a cavity therein, and the steering mechanism 40 is disposed in the cavity of the first beam 10, wherein the steering mechanism 40 includes a first drum 42, a second drum 44, a steering module 46 and a shaft 48, the first drum 42 and the second drum 44 are respectively disposed on the left and right sides of the first beam 10, the steering module 46 is disposed on the left side of the first drum 42, and the shaft 48 passes through the steering module 46, the first drum 42 and the second drum 44, so that the steering module 46 can drive the first drum 42 and the second drum 44 to rotate synchronously via the shaft 48. In the present embodiment, the number of the ladder cords 70 is two, and the upper ends of the ladder cords 70 are connected to the first drums 42 and the second drums 44, respectively, so that the ladder cords 70 are suspended below the first beam 10. Unlike the previous embodiments, the blind 2 of the present embodiment further includes a first pull cord 92, a second pull cord 94, and an elevating mechanism 100. The first and second cords 92 and 94 pass through the front and rear sides of the blind body 20, respectively, and there are two sets disposed on the left and right sides of the blind 2, respectively, adjacent to the ladder cord 70. An elevator mechanism 100 is disposed in the cavity of the second beam 30, the upper ends of the first and second pull cords 92, 94 are connected to the first and second drums 42, 44, and the lower ends of the first and second pull cords 92, 94 extend to the second beam 30 and are connected to the elevator mechanism 100.

As shown in fig. 12, the lifting mechanism 100 includes a driving wheel 102, a spring storage wheel 104, a spring 106, a winding wheel 108, and a winding wheel 110. The spring 106 has one end connected to the driving wheel 102 and the other end wound around the spring storage wheel 104, and can be wound around the driving wheel 102 or released from the driving wheel 102 and wound around the spring storage wheel 104 according to the rotation direction of the driving wheel 102. The winding wheel 108 is disposed to the right, and the winding wheel 110 is disposed to the left, so that the winding wheel 108 is closer to the driving wheel 102 than the winding wheel 110. The driving wheel 102 and the winding wheels 108 and 110 have gears, and are directly or indirectly engaged with each other through the gears to be interlocked with each other. In this embodiment, the second end of the first cord 92 and the second end of the second cord 94 on the left side of fig. 10 are connected to and windable around a take-up reel 110, and the second end of the first cord 92 and the second end of the second cord 94 on the right side are connected to and windable around a take-up reel 108 on the right side. When the winding rollers 108, 110 rotate, the two sets of the first and second pulling ropes 92, 94 can be synchronously wound or released by the winding rollers 108, 110 according to the different rotation directions.

The two ladder cords 70 of the present embodiment may have the same or similar structure, and as shown in fig. 13, the ladder cord 70 has a first warp 72, a second warp 74, a plurality of supporting members, a plurality of restraining members, a plurality of first positioning members 82 and a plurality of second positioning members 84. The first warp threads 72 and the second warp threads 74 are substantially parallel, the first warp threads 72 define a plurality of first positions, which are first positions P1A, P11, P12 and P13 … P1n in sequence from top to bottom, and the first positions are separated by a predetermined distance D. The second meridian 74 has a plurality of second positions P2A, P21, P22, P23 … and P2n from top to bottom, and the second positions are also separated by a predetermined distance D. The plurality of supporting members are defined as a top supporting member 76A, a first supporting member 761, a second supporting member 762, a third supporting member 763 … … and a last supporting member 76n in sequence from top to bottom, two ends of the top supporting member 76A are respectively disposed at a first position P1A and a second position P2A, two ends of the first supporting member 761 are respectively disposed at a first position P11 and a second position P21, two ends of the second supporting member 762 are respectively disposed at a first position P12 and a second position P22, two ends of the third supporting member 763 are respectively disposed at a first position P13 and a second position P23, and so on, until two ends of the last supporting member 76n are respectively disposed at a first position P1n and a second position P2 n. The second meridian 54 further defines a plurality of third positions and a plurality of fourth positions, the third positions are sequentially from top to bottom the third positions P31, P32, P33 … P3n, and the third positions are also spaced apart by a predetermined distance D. The fourth positions are sequentially the fourth positions P41, P42, P43 … P4n and P4n +1 from top to bottom, and the fourth positions are also spaced apart by the predetermined distance D.

Like the previous embodiment, in the present embodiment, the second position, the third position and the fourth position on the second warp yarn 54 are not overlapped, and sequentially include the second position P2A, the fourth position P41, the third position P31, the second position P21, the fourth position P42, the third position P32 and the second position P22 from top to bottom, and so on until the fourth position P4n, the third position P3n, the second position P2n and finally the fourth position P4n + 1. The plurality of constraining pieces are respectively formed by approximately doubling a rope, and each constraining piece is correspondingly arranged at each third position. The first restraint member 781, the second restraint member 782, the third restraint member 783 … … and the last restraint member 78n are defined as the restraint members from top to bottom. The first restraint member 781 is disposed in the third position P31, the second restraint member 782 is disposed in the third position P32, the third restraint member 783 is disposed in the third position P33, and so on, and finally the restraint member 78n is disposed in the third position P3 n. The limiting members are respectively formed by approximately doubling a rope, and each limiting member is correspondingly arranged at each fourth position. The position-limiting members are defined as a first position-limiting member 801, a second position-limiting member 802, a third position-limiting member 803 … …, a last position-limiting member 80n, and a fixed position-limiting member 80n +1 from top to bottom. The first limiting element 801 is disposed at the fourth position P41, the second limiting element 802 is disposed at the fourth position P42, the third limiting element 803 is disposed at the fourth position P43, and so on, the last limiting element 80n is disposed at the fourth position P4n, and the fixed limiting element 80n +1 is disposed at the fourth position P4n + 1. A plurality of positioning members 82 are provided on the first warp threads 72 and a plurality of second positioning members 84 are provided on the second warp threads 74. In the embodiment, the first positioning elements 82 are respectively disposed adjacent to the first positions P1A, P11-P1 n of the first warp 72, and the second positioning elements 84 are respectively disposed adjacent to the second positions P2A, P21-P2 n of the second warp 84, but not limited thereto. The positions and the number of the first positioning elements 82 and the second positioning elements 84 can also be adjusted according to requirements.

The structure and arrangement of the ladder cord 70 will be further described by taking the ladder cord 70, the first cord 92, the second cord 94, and the first drum 42 on the left side of fig. 10 as an example. Referring to fig. 10 to 17, in the present embodiment, the first end of the first warp 72, the first end of the second warp 74, the first end of the first pull rope 92 and the first end of the second pull rope 94 are respectively connected to the first drum 42. As shown in fig. 16, when the blades 21 to 2n are in the horizontal state as shown in fig. 14, the first warp threads 72 and the first pull cords 92 contact the first drum 42 from the front side of the first drum 42, pass around the top and the rear side of the first drum 42 in this order along the outer peripheral surface of the first drum 42, and are fixed to the lower portion of the first drum 42, and the second warp threads 74 and the second pull cords 94 contact the first drum 42 from the rear side of the first drum 42, pass around the top and the rear side of the first drum 42 in this order along the outer peripheral surface of the first drum 42, and are also fixed to the lower portion of the first drum 42. In other words, the first warp threads 72, the second warp threads 74, the first pull cord 92 and the second pull cord 94 are connected to the first drum 42 at a position where the first drum 42 is closest to the blade. When the first drum 42 rotates, the first warp yarn 72 and the first pull cord 92 are simultaneously wound or released by the first drum 42 along with the rotation of the first drum 42. In contrast, the second warp yarn 74 and the second pull cord 94 are simultaneously released or retracted by the first drum 42.

The first warp yarn 72 and the second warp yarn 74 extending from the first drum 42 are disposed substantially parallel in the section between the first beam 10 and the second beam 30 (e.g., the first warp yarn 72 and the second warp yarn 74 proximate to the first beam 10 and/or the second beam 30 may be non-parallel), the first warp yarn 72 passes through the front side of the curtain 20, and the second warp yarn 74 passes through the rear side of the curtain 20 and extends toward the second beam 30. The top support 76A includes two single adjusting units 76A1, 76A2, wherein the adjusting unit 76A1 is at the bottom, the adjusting unit 76A2 is at the top, and the top blade 2A is disposed between the two adjusting units 76A1, 76A 2. The first vane 21 bears against the first support 761, the second vane 22 bears against the second support 762, the third vane 23 bears against the third support 763, and so on, and the last vane 2n bears against the last support 76 n. As shown in FIG. 14, when the first position P1A of the first warp 72 and the second position P2A of the second warp 74 are aligned, the remaining first positions P11-P1 n and the remaining second positions P21-P2 n are also aligned, respectively, so that the supports 76A, 761-76 n are horizontal, and the blades 2A, 21-2 n supported thereon are also horizontal. In other words, the inclination angle of the supports 76A, 761-76 n determines the inclination angle of the blades 2A, 21-2 n against which they rest. In addition to the first warp threads 72 and the second warp threads 74, the first pull cord 92 and the second pull cord 94 extending from the first drum 42 are also arranged substantially parallel in the section between the first beam 10 and the second beam 30. The first pulling rope 92 is adjacent to the first warp 72, and the first pulling rope 92 passes through at least one first positioning member 82 on the first warp 72 and extends toward the second beam 30. The second pull cord 94 is adjacent to the second warp yarn 74 and the second pull cord 92 passes through the at least one second positioning member 84 on the second warp yarn 74 and extends toward the second beam 30.

In the present embodiment, as shown in fig. 10 and 11, the top blade 2A is provided with the recessed portions 2AO at the positions corresponding to the first longitude line 72 and the second longitude line 74, respectively, so that the first longitude line 72 and the second longitude line 74 passing through can be sunk into the corresponding recessed portions 2 AO. As shown in fig. 15 and 17, the first blade 21 has a through hole 21O on the side close to the second meridian 74, the second blade 22 has a through hole 22O on the side close to the second meridian 74, and so on, and the last blade 2n has a through hole 2nO on the side close to the second meridian 54. The first restraint member 781 passes through the through hole 21O of the first blade 21 to form a first restraint loop 781 ', the second restraint member 782 passes through the through hole 22O of the second blade 22 to form a second restraint loop 782 ', and so on, and the final restraint member 78n passes through the through hole 2n of the last blade 2n to form a final restraint loop 78n '. The first limiting member 801 located above the first blade 21 passes through the first limit ring 781 ' to form a first limit ring 801 ', the second limiting member 802 located between the first blade 21 and the second blade 22 passes through the first limit ring 801 ', then passes through the second limit ring 782 ' to form a second limit ring 802 ', and so on, each limiting member passes through each blade to form a limit ring, and the limiting member located above the blade passes through the limit ring formed by the previous limiting member, then passes through the limit ring below until the last limiting member 80n passes through the last limit ring 78n ' to form a last limit ring 80n ', and then the fixed limiting member 80n +1 passes through the last limit ring 80n ' to form a fixed limit ring 80n +1 '.

Finally, as shown in fig. 17, the second ends of the first warps 72, the second ends of the second warps 72 and the fixing stopper rings 80n + 1' extend in the direction of the second beam 30, respectively, and are combined with the anchors 32 in the second beam 30. In the present embodiment, the anchor 32 includes a first latch 322 and a second latch 324, the first latch 322 has a first slot 322S, and the second latch 324 has a second slot 324S. The anchor 32 has a channel, and the second end of the first warp 72 extends into the anchor 32 and then is exposed from one side of the first fastening block 322, and then surrounds the first fastening block 322 and then is embedded and fastened in the first fastening groove 322S. The second end of the second meridian 74 extends into the anchor 32, then is exposed from one side of the second block 324, and then surrounds the second block 324 and then is embedded in and fastened to the second fastening groove 324S. After the fixing limit ring 80n + 1' extends to the anchor 32, it is directly sleeved on the second block 324. Thereby making it impossible to separate the second end of the first warp 72, the second end of the second warp 72 and the fixing stopper ring 80n + 1' from the second beam 30. In another embodiment, the second end of the first warp thread 72, the second end of the second warp thread 74 and the fixing limit loop 80n +1 ' may be connected to the second beam 30 in other manners, for example, holes are formed in the second beam 30, and the second end of the first warp thread 72, the second end of the second warp thread 72 and the fixing limit loop 80n +1 ' are fixed by knotting after passing through the holes, so that the second end of the first warp thread 72, the second end of the second warp thread 72 and the fixing limit loop 80n +1 ' can also be fixed to the second beam 30. Alternatively, only the second ends of the first warp threads 72 and the second ends of the second warp threads 72 may be fixed to the second beams 30, but the final restraining loops 80n may be restrained by fixing the restraining loops 80n + 1' to the second warp threads 74, so that the final restraining member 78n is restrained in the through hole 2nO of the final blade 2 n. The second end of the first pull cord 92 and the second end of the second pull cord 92 are turned and extended toward the lifting mechanism 100 after passing through the anchor 32, and the first pull cord 92 and the second pull cord 94 are connected to the winding wheel 110. The anchor 34 is coupled to the right ladder cord 70 and the fixing stop loop 80n + 1' in fig. 1 in a symmetrical manner with respect to the anchor 32, which is not described in detail herein. The first pull cord 92 and the second pull cord 94 on the right side in fig. 1 pass through the anchor 34, turn and extend toward the lifting mechanism 100, and finally connect to the winding wheel 108.

In the embodiment, the first warp 72, the second warp 74, the supporting members 761-76 n, the restraining members 781-78 n, the limiting members 801-80 n +1, the first positioning member 82 and the second positioning member 84 of the ladder cord 70 are integrally formed in the weaving process, so that the second position, the third position and the fourth position are not overlapped. In another embodiment, the supporting members 761-76 n, the fastening members 781-78 n, the limiting members 801-80 n +1, the first positioning member 82 and the second positioning member 84 may also be independently formed threads or rings, and are respectively combined with the first warp threads 72 and the second warp threads 74, for example, by sewing or bonding, so that the supporting members 761-76 n, the fastening members 781-78 n, the limiting members 801-80 n +1, the first positioning member 82 and the second positioning member 84 are fixed on the first warp threads 72 and the second warp threads 74. The supporting piece, the restraining piece and the limiting piece can also be arranged at the same position of the second warp, but the length of the restraining piece is still smaller than that of the limiting piece, so that the blade can be limited from being transversely displaced to a large extent after the blade is wound. In addition, in the embodiment, the constraining members 781 to 78n, the limiting members 801 to 80n +1, the first positioning members 82 and the second positioning members 84 are loops formed by folding a rope, but not limited thereto, and the constraining members 781 to 78n, the limiting members 801 to 80n +1, the first positioning members 82 and the second positioning members 84 may also be formed by complete rope loops and connected to the second warp threads 74 at any position on the rope loops. In addition, in the embodiment, the circumference of the constraining member only needs to be enough to allow the constraining ring formed after each constraining member passes through the through hole of the blade to allow the limiting member to pass through, and when the support member changes the inclination angle, the blade does not change the angle along with the inclination of the support member. The limiting member needs to be slightly larger than twice the predetermined distance D to be able to hook the restraining ring and the limiting ring without affecting the distance between the supporting members (i.e., between the blades), so the circumference of the restraining member is significantly smaller than that of the limiting member. In addition, the second warp 74 passes through the rear side of the curtain 20 in the embodiment, but not limited to this, the second warp 74 and the first warp 72 may be reversed. Or through holes are formed in the positions, adjacent to the first longitude lines 72 and the second longitude lines 74, of the blades 21-2 n, and the through holes of the blades corresponding to the restraining parts and the limiting parts can be simultaneously formed in the first longitude lines 72 and the second longitude lines 74.

In addition, the first positioning members 82 are respectively and correspondingly disposed adjacent to the first positions P11-P1 n, and the second positioning members 84 are respectively and correspondingly disposed adjacent to the second positions P21-P2 n, so that the distance between the first positioning members 70 and the distance between the second positioning members 72 are substantially the predetermined distance D, but not limited thereto. The distance between the first positioning members 82 and the distance between the second positioning members 84 can be determined according to design requirements and is not limited to the equidistant configuration. In the embodiment, the first positioning element 82 and the second positioning element 84 only allow the first pull rope 92 and the second pull rope 94 to pass through, so the circumference of the first positioning element 82 and the circumference of the second positioning element 84 are both smaller than the circumference of the restraining ring, but not limited thereto. The sizes of the first positioning element 82 and the second positioning element 84 can be determined according to design requirements, but the aperture of the first positioning element is larger than the diameters of the first pulling rope 92 and the second pulling rope 94, so that the first pulling rope 92 and the second pulling rope 94 can pass through the first positioning element and the second positioning element, and can freely move up and down in the corresponding positioning elements.

By means of the configuration, the blades 21-2 n are limited by the restraining parts 781-78 n and the limiting parts 801-80 n +1, so that even if the restraining parts are intentionally pulled out of the through holes of the blades, the limiting parts penetrating the restraining parts can be brought into the through holes, the restraining parts or the limiting parts can be constantly kept penetrating through the through holes 21O-2 nO of the blades 21-2 n, and therefore the blades cannot be pulled out of the ladder rope 70. In addition, since the circumferential length of the constraining member is small, there is not much space for deformation and deflection of margin in the lateral direction, so that the blades 21 to 2n cannot be moved laterally largely. The first string 92 is restrained by each first retainer ring 82 so as not to be horizontally separated from the first warp 72, and the first string 92 is not easily pulled out in the horizontal direction to form a loop. The second pulling rope 94 is restrained by the respective second holding rings 84 so as not to be horizontally distanced from the second warp threads 74, and the second pulling rope 94 is made not to be easily pulled out in the horizontal direction to form a loop.

It should be noted that, in the present embodiment, the length of the minor axis direction of the first beam 10 of the blind 2 is smaller than the length of the minor axis direction of the vanes 20A, 21-2 n, and the upper ends of the two sets of ladder cords 70 are connected to the first drum 42 and the second drum 44 disposed in the first beam 10, respectively, so that the first warp 72 and the second warp 74 will assume an inward-inclined angle after passing through the vane 2A, so that the vane 2A closest to the first beam 10 bears a larger pressure from the first warp 72 and the second warp 74. Therefore, the concave portions 2AO corresponding to the first meridian 72 and the second meridian 74 as shown in fig. 10 and 11 are provided on both sides of the vane 2A to blunt the inward-inclined angles of the first meridian 72 and the second meridian 74, so as to reduce the influence of the pressure on the vane 2A, and the first meridian 72 and the second meridian 74 embedded in the concave portions 2AO can make the vane 2A not easily move laterally. Meanwhile, the two adjusting units 76A1, 76A2 of the supporting piece 76A are utilized to enable the blade 2A arranged between the two adjusting units 76A1, 76A2 to tilt synchronously along with the tilting of the supporting piece, and the blade cannot be independently turned into an angle different from the other blades 21-2 n because of no restriction of a restraining piece.

Further explaining the operation of the blind of the present invention. Referring to fig. 10-12 and 14, the blind 2 reveals that the second beam 30 is positioned furthest from the first beam 10, defined as fully extended. When the blind 2 is in the fully expanded state, the first warp 72 and the second warp 74 between the first rail 10 and the second rail 30, and the first string 92 and the second string 94 between the first rail 10 and the second rail 30 are in a state of being substantially parallel to each other and extending vertically, respectively. When the blind 2 is in the fully extended state, the first warp threads 62 and the second warp threads 64 between the first beams 10 and the second beams 30 are in a state of being substantially parallel to each other and extending vertically, respectively. At the same time, the spring 106 of the elevator mechanism 100 is mostly wound around the drive wheel 102 and accumulates energy, and the take-up wheels 108, 110 also release most of the first and second pull cords 92, 94. When a user wants to change the light-shielding range of the blind body 20 of the blind 2 as shown in fig. 10, the second beam 30 may be pushed upward such that the distance between the second beam 30 and the first beam 10 is reduced. In the process of moving the second beam 30 toward the first beam 10, the distance between the second beam 30 and the first beam 10 becomes smaller, so that the first pull rope 92 and the second pull rope 94 become loose, and at the same time, the spring 106 of the lifting mechanism 100 is gradually released from the driving wheel 102 and rewound on the spring storage wheel 104, and the released energy drives the driving wheel 102 and the winding wheels 108 and 110 to rotate, at this time, the first pull rope 92 and the second pull rope 94 on the right side are gradually wound by the winding wheel 108, and the first pull rope 92 and the second pull rope 94 on the left side are gradually wound by the winding wheel 110. Until the second beam 30 is stacked upward to the highest position as shown in fig. 18, the state where the second beam 30 is located at the closest position to the first beam 10 is defined as the fully collapsed state. The user adjusts the shade range of the curtain 20 between the fully extended and fully retracted positions by moving the second beam 30. The operation principle of the lifting mechanism 100 to roll up or release the first pull rope 92 and the second pull rope 94 in cooperation with the distance change between the second beam 30 and the first beam 10 during the movement of the second beam 30 relative to the first beam 10 and the technology of stopping the second beam 30 at the position of ending the operation when the second beam 30 is not moved any more belong to the prior art in the field, and are not described in detail herein. The number of the first pulling rope 92 and the second pulling rope 94 is not limited to two, but the number may be determined according to the width of the blind 2, and at least one first warp thread 92 and one second warp thread 94 are required to keep the second beam 30 of the blind 2 horizontal without any inclination. In the present embodiment, the lifting mechanism 100 is a spring case, but not limited thereto. There are a variety of mechanisms in the art, including manual or electric, that can cause the second beam 30 to change position, depending on the need. In the present embodiment, the lifting mechanism 100 is disposed in the cavity of the second beam 30 and between the anchors 32 and 34, but not limited thereto. Depending on the size of the cavity of the second beam 30 and the location of the anchor, the lift mechanism 100 may be located elsewhere in the cavity of the second beam 30, and the first and second pull cords 92, 94 may be directly connected to the first beam 10. In addition, in another embodiment, the lifting mechanism 100 may be provided in the first beam 10, and the first and second ropes 92 and 94 may be connected to the second beam 30.

Referring to fig. 10, 14, 19-21, in the present embodiment, the steering module 46 further includes an operating rod 462 exposed to the first beam 10 for a user to drive the steering module 46. When the user wants to change the light transmittance of the blind 2, the operating rod 462 is rotated to drive the turning module 46 to rotate the shaft 48, and the rotation of the shaft 48 drives the first drum 42 and the second drum 44 to rotate synchronously and in the same direction, which in turn causes the ladder cords 70 connected to the first drum 42 and the second drum 44 to change states. As shown in FIG. 14, the first positions P1A, P11-P1 n of the first meridian 72 and the second positions P2A, P21-P2 n of the second meridian 74 are opposite to each other in height, so that the supports 76A, 761-76 n are horizontally arranged, the blades 2A, 21-2 n supported thereon are also horizontally arranged, and the gaps between the blades are the largest, which is defined as a light transmission state. Taking the ladder cord 70 on the left side of fig. 10 as an example, when the lever 462 is rotated by the user to rotate the shaft 48, for example, when the shaft 48 is rotated clockwise in the view of fig. 14, the first drum 42 discharges a portion of the first warp yarn 72, and simultaneously furls the partial second warps 74 so that the length of the first warp 72 between the first beam 10 and the second beam 30 is increased, and the length of the second warp 74 between the first beam 10 and the second beam 30 is decreased, so that the supports 76A, 761-76 n between the first warp thread 72 and the second warp thread 74 are inclined with a low front and a high rear (in terms of the angle of the user facing the blind 2), and drives the blades 2A, 21-2 n thereon to tilt synchronously until the blades 2A, 21-2 n are in a state of being overlapped with each other at the edges and having no gap between the blades as shown in FIGS. 19-21, which is defined as a closed state.

As shown in fig. 20 and 21, the blade 2A is sandwiched between the two adjusting units 76a1, 76a2, the first restraint member 781 passed through the through hole 21O suspends the blade 21, the first restraint member 801 is bent downward from the gap between the bottom surface of the blade 2A and the second warp 74, and then passed through the first loop 781 ', the first restraint loop 801' is formed in the gap between the bottom surface of the first blade 21 and the second warp 74, and so on. The circumferences of the restraining pieces 781 to 78n are small, when the blades 21 to 2n are almost vertical, the restraining pieces 781 to 78n hang the blades 21 to 2n respectively to position the blades 21 to 2n, so that the downward sliding movement and the transverse movement of the blades 21 to 2n are avoided, the overlapping ranges of the adjacent blades are approximately equal, and the adjacent blades are aligned in the left-right direction. In addition, the stoppers 801 to 80n +1 are hidden on the back of the blades 2A, 21 to 25 and are stretched without much margin, so that the closing of the blades 2A, 21 to 2n is not affected, and the light can be effectively blocked and the privacy can be protected. The operating principle and configuration of the steering mechanism 40 for adjusting the light transmittance of the curtain 20 between the light transmittance state and the closed state are well known in the art and will not be described herein. In addition, the number of the ladder cords 70 in the present embodiment is two, but not limited thereto. The number of the ladder cords 70 can be adjusted according to the requirement, for example, the wider the width of the blind 2 is, the more the number of the ladder cords 70 is required. In this embodiment, the first end of the first warp thread 72 and the first end of the second warp thread 74 are both connected to the first drum 42 and the second drum 44, in another embodiment, only one of the first end of the first warp thread and the first end of the second warp thread may be connected to the first drum and the second drum, and the other one is directly connected to the first beam, and also when the first drum and the second drum rotate, the first warp thread and the second warp thread are driven to move relatively, so that the support member tilts to change the angle of the blade.

The ladder cord 70, in addition to the above-described embodiments, forms each restraining loop after each restraining member passes through the through hole of each blade from the top surface toward the bottom surface of the blade, and then passes through the restraining loop formed by the previous restraining member by the restraining member located above each blade, then passes through the restraining loops, and so on to be sequentially looped around. Under the premise that the ladder rope structure 70 is not changed, other threading and winding modes can also achieve the purpose of limiting the transverse movement of the blades to a large extent. For example, as shown in fig. 22 and 23, another threading pattern of the ladder cord 70 is shown. In the figure, the first restraining member 781 is also inserted through the first through hole 21O of the first blade 21 from top to bottom to form a first restraining loop 781'. The second constraining member 782 also passes through the second through hole 22O of the second blade 22 from top to bottom and forms a second constraining loop 782'. In contrast, in the present embodiment, the third limiting member 803 located below the second blade 22 is bent upward to form a third limiting ring 803 ' after passing through the second limiting ring 782 ', and the second limiting member 802 located below the first blade 21 is bent upward to pass through the third limiting ring 803 ' and then pass through the first limiting ring 781 ', and form a second limiting ring 802 '. The first position-limiting member 801 located under the top blade 2A is bent upward through the second position-limiting ring 802', and then can be fixed to the second warp thread 74 or fixed to the first drum 42 and the second drum 44 (not shown). If the lifting mechanism is matched, the first pulling rope 92 can pass through the first positioning part 82 arranged on the first warp 72, and the second pulling rope 94 can pass through the second positioning part 84 arranged on the second warp 74, so that the first pulling rope 92 and the second pulling rope 94 are limited to be adjacent to the ladder rope 70, the appearance is integrated, and the first pulling rope 92 and the second pulling rope 94 are prevented from being pulled out in the horizontal direction to form a rope loop.

In this way, each restraining member is the same as the previous embodiment and passes through the corresponding through hole of the blade from top to bottom, but each limiting member is different from the previous embodiment and is bent upward by the limiting member located below the blade, and then sequentially passes through the limiting ring formed by the limiting members located below and then passes through the restraining ring located above. The ring is penetrated and wound like this, each through-hole of each blade can be kept to pass through by the restraint piece, and the purpose of limiting the transverse movement of the blade is achieved. When the curtain body is in a closed state, the blades can be hung, so that the blades are prevented from sliding down and moving inconsistently, the overlapping range among the blades is consistent, and the light leakage phenomenon is avoided.

In addition to the embodiments of the ladder cord shown in fig. 22 and 23, the restraining member and the restraining member of the ladder cord may be arranged in other ways.

Referring to fig. 24 to 26, another ladder cord structure is disclosed. In the figure, the ladder cord 200 has a first warp 202, a second warp 204, a plurality of supporting members, a plurality of restraining members, a plurality of first positioning members 212 and a plurality of second positioning members 214. The first warp 202 defines a plurality of first positions, which are sequentially the first positions P11, P12, P13 … P1n from top to bottom, and the second warp 204 defines a plurality of second positions, which are sequentially the second positions P21, P22, P23 … P2n from top to bottom. The plurality of supporting members are defined as a first supporting member 2061, a second supporting member 2062, a third supporting member 2063 … … and a last supporting member 206n from top to bottom in sequence, two ends of the first supporting member 2061 are respectively disposed at a first position P11 and a second position P21, two ends of the second supporting member 2062 are respectively disposed at a first position P12 and a second position P22, two ends of the third supporting member 2063 are respectively disposed at a first position P13 and a second position P23, and so on, until two ends of the last supporting member 206n are respectively disposed at a first position P1n and a second position P2 n. The second meridian 204 further defines a plurality of third positions and a plurality of fourth positions, the third positions are sequentially from top to bottom the third positions P31, P32 and P33 … P3n, and the fourth positions are sequentially from top to bottom the fourth positions P41, P42, P43 … P4n and P4n + 1. The second position, the third position and the fourth position on the second meridian 204 are all non-overlapping, and are the fourth position P41, the second position P21, the third position P31, the fourth position P42, the second position P22 and the third position P32 from top to bottom in sequence, and so on to the fourth position P4n, the second position P2n, the third position P3n, and finally to the fourth position P4n + 1.

The plurality of constraining members are correspondingly disposed at each third position, and the constraining members are defined as a first constraining member 2081, a second constraining member 2082, a third constraining member 2083 … …, and a last constraining member 208n from top to bottom. The first restraint 2081 is disposed at the third position P31, the second restraint 2082 is disposed at the third position P32, the third restraint 2083 is disposed at the third position P33, and so on, and finally the restraint 208n is disposed at the third position P3 n. The plurality of position-limiting elements respectively correspond to the fourth positions, and the position-limiting elements are defined as a first position-limiting element 2101, a second position-limiting element 2102, a third position-limiting element 2103 … …, a last position-limiting element 210n, and a fixed position-limiting element 210n +1 from top to bottom. The first limiting element 2101 is disposed at the fourth position P41, the second limiting element 2102 is disposed at the fourth position P42, the third limiting element 2103 is disposed at the fourth position P43, and so on, the last limiting element 210n is disposed at the fourth position P4n, and the fixed limiting element 210n +1 is disposed at the fourth position P4n + 1. A plurality of positioning members 212 are provided on the first warp threads 202 and a plurality of second positioning members 214 are provided on the second warp threads 204. In the present embodiment, each first positioning member 212 is disposed adjacent to each first position P11-P1 n on the first warp yarn 202, and each second positioning member 214 is disposed adjacent to each second position P21-P2 n on the second warp yarn 204.

The structural difference from the ladder cord 70 of the foregoing second embodiment is that: the restraints are not arranged above the supports but instead below the supports. In the present embodiment, after the first restraining member 2081 passes through the through hole 21O of the first blade 21 from bottom to top, a first restraining ring 2081 'is formed above the blade 21, and after the second restraining member 2082 passes through the through hole 22O of the second blade 22 from bottom to top, a second restraining ring 2082' is formed above the blade 22. The first position-limiting element 2101 above the first blade 21 passes through the first restraining loop 2081 ' to form a first restraining loop 2101 ', and the second position-limiting element 2102 between the first blade 21 and the second blade 22 passes through the first restraining loop 2101 ' and then passes through the second restraining loop 2082 ' to form a second restraining loop 2102 '. In this way, each restraining member passes through the through hole of each blade from bottom to top to form a restraining ring, and each restraining member above each blade sequentially passes through the limiting ring formed by the previous restraining member and then passes through the restraining ring below until the last restraining member 210n passes through the last restraining ring 208 n' to form the last limiting ring, and then passes through the last limiting ring by the fixed restraining member 210n +1 to form a fixed limiting ring.

Referring to fig. 27 and 28, another threading method of the ladder cord 200 is disclosed under the same structure. In the present embodiment, as in the previous embodiments, after the first restraining member 2081 passes through the through hole 21O of the first blade 21 from bottom to top, a first restraining ring 2081 'is formed above the blade 21, and after the second restraining member 2082 passes through the through hole 22O of the second blade 22 from bottom to top, a second restraining ring 2082' is formed above the blade 22. The difference from the previous embodiment is that: the third stop 2103, which is located below the second blade 22, bends upward through the second restraint loop 2082 'and forms a third stop loop 2103'. The second retaining member 2102, which is located between the first blade 22 and the second blade 21, is bent upward through the third retaining ring 2103 ' and then through the first restraining ring 2081 ', forming a second retaining ring 2102 '. In this way, each restraining part penetrates through each blade from bottom to top to form a restraining ring, and each limiting part positioned below each blade sequentially penetrates through the limiting ring formed by the previous limiting part and then penetrates through the restraining ring above. Finally, the first retainer 2101 above the first blade 21 is bent upward through the second retainer ring 2102' and then fixed to the second warp yarn 304 or the first and second drums 42 and 44 (not shown).

In the above ladder rope structures, each of the constraining members and each of the limiting members extend from the second warp toward the first warp, that is, one of each of the constraining members and each of the limiting members is disposed on the second warp, but the free ends of each of the constraining members and each of the limiting members are located between the first warp and the second warp. In another embodiment, each constraint element and/or each limit element may also be disposed in different directions.

Referring to fig. 29-31, another ladder cord structure is disclosed. In the figure, the ladder cord 300 includes a first warp thread 302, a second warp thread 304, a plurality of supporting members, a plurality of restraining members, a plurality of first positioning members 312, and a plurality of second positioning members 314. The first warp thread 302 has a plurality of first positions, which are sequentially from top to bottom, P11, P12, P13 … P1n, and the second warp thread 304 has a plurality of second positions, which are sequentially from top to bottom, P21, P22, P23 … P2 n. The plurality of supporting members are defined as a first supporting member 3061, a second supporting member 3062, a third supporting member 3063 … … and a last supporting member 306n from top to bottom in sequence, two ends of the first supporting member 3061 are respectively disposed at a first position P11 and a second position P21, two ends of the second supporting member 3062 are respectively disposed at a first position P12 and a second position P22, two ends of the third supporting member 3063 are respectively disposed at a first position P13 and a second position P23, and so on, until two ends of the last supporting member 306n are respectively disposed at a first position P1n and a second position P2 n. The second meridian 304 further defines a plurality of third positions and a plurality of fourth positions, the third positions are sequentially from top to bottom the third positions P31, P32 and P33 … P3n, and the fourth positions are sequentially from top to bottom the fourth positions P41, P42, P43 … P4n and P4n + 1. The second position, the third position and the fourth position on the second longitude line 304 are all non-overlapped, and sequentially include a fourth position P41, a third position P31, a second position P21, a fourth position P42, a third position P32 and a second position P22 from top to bottom, and so on to a fourth position P4n, a third position P3n, a second position P2n, and finally a fourth position P4n + 1.

The plurality of constraining elements are respectively and correspondingly disposed at each third position, and each constraining element, like the previous embodiments, extends towards the first meridian 302 and is located between the first meridian 302 and the second meridian 304. The first constraining member 3081, the second constraining member 3082, the third constraining member 3083 … … and the last constraining member 308n are defined in sequence from top to bottom. The first constraining member 3081 is disposed at the third position P31, the second constraining member 3082 is disposed at the third position P32, the third constraining member 3083 is disposed at the third position P33, and so on, and finally the constraining member 308n is disposed at the third position P3 n. The plurality of limiting parts are respectively and correspondingly arranged at the fourth positions. The difference is that the extending direction of each limiting member is different from the extending direction of each constraining member, but extends towards the direction away from the second meridian 304. The position-limiting members are defined as a first position-limiting member 3101, a second position-limiting member 3102, a third position-limiting member 3103 … …, a last position-limiting member 310n, and a fixed position-limiting member 310n +1 from top to bottom. The first limiting member 3101 is disposed at the fourth position P41, the second limiting member 3102 is disposed at the fourth position P42, the third limiting member 3103 is disposed at the fourth position P43, and so on, the last limiting member 310n is disposed at the fourth position P4n, and the fixed limiting member 310n +1 is disposed at the fourth position P4n + 1. A plurality of positioning members 312 are provided on the first warp threads 302 and a plurality of second positioning members 314 are provided on the second warp threads 304. In the present embodiment, the first positioning elements 312 are respectively disposed adjacent to the first positions P11-P1 n of the first warp threads 302, and the second positioning elements 314 are respectively disposed adjacent to the second positions P21-P2 n of the second warp threads 304.

The difference from the ladder cord 70 of the foregoing second embodiment is that: when the blade is wound, each limiting member does not extend from the position between the first warp 302 and the second warp 304 and bends downward from the outer side of the second warp 304. In the embodiment, the first constraining member 3081 passes through the through hole 21O of the first blade 21 from top to bottom to form a first constraining ring 3081 'under the blade 21, and the second constraining member 3082 passes through the through hole 22O of the second blade 22 from top to bottom to form a second constraining ring 3082' under the blade 22. The first stop 3101 above the first blade 21 is bent downward along the outer side of the second warp yarn 304, and passes through the first restraining ring 3081 'to form a first stop ring 3101'. The second limiting member 3102 between the first blade 21 and the second blade 22 is bent downward along the outer side of the second warp line 304, and passes through the first limiting ring 3101 ' and then the second restraining ring 3082 ' to form a second limiting ring 3102 '. By analogy, each restraining member respectively penetrates through the through hole of each blade from top to bottom to form a restraining ring, each restraining member above each blade bends downwards along the outer side of the second warp 304, sequentially penetrates through the restraining ring formed by the previous restraining member, then penetrates through the restraining ring below, and forms a final restraining ring until the final restraining member 310n penetrates through the final restraining ring 308 n' and then forms a fixed restraining ring after the fixed restraining member 310n +1 penetrates through the final restraining ring. As shown in fig. 31, when the curtain 20 is in the closed state as shown in fig. 19 to 21, the position-limiting members are not stacked between the blades and the second warp thread 304, but are looped around the outside of the second warp thread 304.

Referring to fig. 32 and 33, another winding method of the ladder cord 300 is disclosed under the same structure. In the embodiment, the first constraining member 3081 passes through the through hole 21O of the first blade 21 from top to bottom to form a first constraining ring 3081 'under the blade 21, and the second constraining member 3082 passes through the through hole 22O of the second blade 22 from top to bottom to form a second constraining ring 3082' under the blade 22. The difference from the previous embodiment is that: the third stop 3103, which is located below the second blade 22, bends upward along the outside of the second warp line 304, passes through the second restraining loop 3082 'and forms a third stop loop 3103'. The second limiting member 3102 between the first blade 22 and the second blade 21 is bent upward along the outer side of the second warp line 304, passes through the third limiting ring 3103 ', and then passes through the first restraining ring 3081 ', forming a second limiting ring 3102 '. By analogy, each restraining member respectively penetrates through the through hole of each blade from top to bottom to form a restraining ring, and each limiting member positioned below each blade is bent upwards along the outer side of the second warp 304, sequentially penetrates through the limiting ring formed by the previous limiting member, and then penetrates through the restraining ring above. Finally, the first stop 3101, which is located above the first blade 21, is bent upward through the second stop ring 3102', and then may be fixed to the second warp yarn 304 or to the first and second drums 42 and 44 (not shown).

Referring to fig. 34-36, another ladder cord structure is disclosed. In the figure, the ladder cord 400 includes a first warp 402, a second warp 404, a plurality of supporting members, a plurality of restraining members, a plurality of first positioning members 412 and a plurality of second positioning members 414. The first warp 402 has a plurality of first positions, which are sequentially from top to bottom, i.e. first positions P11, P12, and P13 … P1n, and the second warp 404 has a plurality of second positions, which are sequentially from top to bottom, i.e. second positions P21, P22, and P23 … P2 n. The plurality of supporting members are defined as a first supporting member 4061, a second supporting member 4062, a third supporting member 4063 … … and a last supporting member 406n from top to bottom in sequence, two ends of the first supporting member 4061 are respectively disposed at a first position P11 and a second position P21, two ends of the second supporting member 4062 are respectively disposed at a first position P12 and a second position P22, two ends of the third supporting member 4063 are respectively disposed at a first position P13 and a second position P23, and so on, until two ends of the last supporting member 406n are respectively disposed at a first position P1n and a second position P2 n. The second meridian 404 further defines a plurality of third positions and a plurality of fourth positions, the third positions are sequentially the third positions P31, P32 and P33 … P3n from top to bottom, and the fourth positions are sequentially the fourth positions P41, P42, P43 … P4n and P4n +1 from top to bottom. The second position, the third position and the fourth position on the second meridian 404 are all non-overlapping, and are the fourth position P41, the second position P21, the third position P31, the fourth position P42, the second position P22 and the third position P32 from top to bottom in sequence, and so on to the fourth position P4n, the second position P2n, the third position P3n, and finally to the fourth position P4n + 1.

In the ladder cord 400 of the present embodiment, the plurality of restraining members are respectively and correspondingly disposed at the third positions, and each of the restraining members extends toward the first warp yarn 402 and is located between the first warp yarn 402 and the second warp yarn 404. The first constraining member 4081, the second constraining member 4082, the third constraining member 4083 … … and the last constraining member 408n are defined as the constraining members in sequence from top to bottom. The first restraint piece 4081 is disposed at the third position P31, the second restraint piece 4082 is disposed at the third position P32, the third restraint piece 4083 is disposed at the third position P33, and so on, and finally the restraint piece 408n is disposed at the third position P3 n. The limiting members are correspondingly disposed at the fourth positions, and each limiting member extends in a direction away from the second meridian 404. The position-limiting elements are defined as a first position-limiting element 4101, a second position-limiting element 4102, a third position-limiting element 4103 … …, a last position-limiting element 410n, and a fixed position-limiting element 410n +1 from top to bottom. The first limiting element 4101 is disposed at the fourth position P41, the second limiting element 4102 is disposed at the fourth position P42, the third limiting element 4103 is disposed at the fourth position P43, and so on, the last limiting element 410n is disposed at the fourth position P4n, and the fixed limiting element 410n +1 is disposed at the fourth position P4n + 1. A plurality of positioning members 412 are provided on the first warp yarn 402 and a plurality of second positioning members 414 are provided on the second warp yarn 304. In the present embodiment, the first positioning members 412 are respectively disposed adjacent to the first positions P11-P1 n of the first warp threads 402, and the second positioning members 414 are respectively disposed adjacent to the second positions P21-P2 n of the second warp threads 404.

The difference with the ladder rope 300 of the previous embodiment is: when the blades are wound, the restraining parts do not penetrate through the through holes of the blades from top to bottom, but penetrate through the through holes of the blades from bottom to top. In this embodiment, the first constraining member 4081 passes through the through hole 21O of the first blade 21 from bottom to top, and then forms a first constraining loop 4081 'above the blade 21, and the second constraining member 4082 passes through the through hole 22O of the second blade 22 from bottom to top, and then forms a second constraining loop 4082' above the blade 22. The first limiting member 3101 located above the first blade 21 is bent downward along the outer side of the second warp 404, and passes through the first restraining loop 4081 'to form a first limiting loop 4101'. The second limiting part 4102 located between the first leaf 21 and the second leaf 22 is bent downward along the outer side of the second meridian 404, and passes through the first limiting ring 4101 ' and then the second restraining ring 4082 ' to form a second limiting ring 4102 '. In this way, each restraining element penetrates through the through hole of each blade from bottom to top to form a restraining ring, and each restraining element located above each blade bends downward along the outer side of the second warp line 404, sequentially penetrates through the restraining ring formed by the previous restraining element, then penetrates through the restraining ring below until the last restraining element 410n penetrates through the last restraining ring 408 n' to form a last restraining ring, and then penetrates through the last restraining ring by the fixed restraining element 410n +1 to form a fixed restraining ring.

Summarizing the utility model discloses a ladder rope structure of blind has first warp, second warp, a plurality of support piece, a plurality of about parts, a plurality of locating part at least. The supporting pieces are arranged between the first warp threads and the second warp threads at intervals, the restraining pieces are arranged on the second warp threads at intervals, and the limiting pieces are arranged on the second warp threads at intervals. Each restraining part can be selectively arranged above or below each supporting part, and each limiting part can be selectively extended towards the first longitude line and positioned between the first longitude line and the second longitude line, or extended towards the direction far away from the second longitude line and positioned outside the second longitude line. When the blades are wound, the restraining pieces can pass through the through holes of the blades from top to bottom or from bottom to top according to the arranged positions to form the restraining ring rings. Each limiting piece can also be selected to be bent upwards or downwards from the position between the first warp and the second warp to pass through the adjacent constraint ring, or to be bent upwards or downwards along the outer side of the second warp to pass through the adjacent constraint ring. Before the limiting member passes through the limiting ring, the limiting member should pass through the limiting ring formed by the previous limiting member (except for the first bent limiting member) to limit the previous limiting member, so that the through hole of each blade is constantly kept to pass through the limiting member or the limiting member.

Borrow by the utility model discloses a blind is equipped with about piece at the ladder rope, and the collocation locating part is worn around, can restrict the blade between first warp and second warp to avoid the blade to be taken out. And the circumference of the restraining part is smaller, so that the blade cannot move transversely greatly. And the setting element of ladder rope then can effectual restriction stay cord the position, makes stay cord and ladder rope be close to as far as possible, presents the integration in the vision, makes the whole outward appearance of blind succinct, and the setting element also can avoid the stay cord to be taken out with the horizontal direction and form the becket, can increase blind's security.

Of course, the present invention can have other embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications should fall within the protection scope of the claims of the present invention.

Claims (20)

1. A blind, comprising:

a first beam;

the second beam is positioned below the first beam;

a plurality of blades positioned between the first beam and the second beam, the plurality of blades including a first blade;

a steering mechanism disposed on the first beam;

a ladder cord comprising:

the first warp thread is provided with a plurality of first positions, and the distance between every two first positions is a preset distance;

the second warp is arranged in a spaced and approximately parallel mode with the first warp, the second warp is provided with a plurality of second positions, a plurality of third positions and a plurality of fourth positions, the space between the second positions is the preset distance, the second positions are respectively arranged corresponding to the first positions, the third positions are respectively arranged adjacent to the second positions, the second positions and the fourth positions are arranged in a staggered mode, and the third positions and the fourth positions are arranged in a staggered mode;

the supporting pieces are arranged between the first warps and the second warps, one end of each supporting piece is correspondingly arranged at each first position of the first warps, and the other end of each supporting piece is correspondingly arranged at each second position of the second warps;

the plurality of restraining pieces are respectively and correspondingly arranged at the third positions of the second warps, and comprise a first restraining piece; and

a plurality of limiting pieces, which are respectively and correspondingly arranged at the fourth positions of the second warp threads, and the limiting pieces comprise a first limiting piece;

the first ends of the first warps and the first ends of the second warps are respectively positioned on the first beams, so that the ladder rope is suspended below the first beams, and the second ends of the first warps and the second ends of the second warps are respectively provided with the second beams; when the ladder rope is driven by the steering mechanism to enable the first warp threads and the second warp threads to move relatively, the plurality of supporting pieces change angles along with the relative movement of the first warp threads and the second warp threads, and simultaneously drive the plurality of blades to change angles; the first blade is provided with a first through hole adjacent to the second longitude line, the first restraint piece penetrates through the first through hole to form a first restraint ring, and the first limiting piece penetrates through the first restraint ring, so that the first through hole of the first blade is kept penetrated by at least one of the first restraint piece or the first limiting piece.

2. The blind of claim 1, wherein the plurality of support members includes a first support member and a second support member, the first support member being closer to the first beam than the second support member; the plurality of blades further comprise a second blade, the first blade is supported against the first supporting part, and the second blade is supported against the second supporting part; the plurality of restraining members further comprise a second restraining member disposed adjacent to the second support member, and the plurality of limiting members further comprise a second limiting member; on the second warp, setting the third position of the first restraint member, closer to the first beam than the second position of the first support member, setting the fourth position of the first limiting member, closer to the first beam than the third position of the first restraint member, setting the third position of the second restraint member, closer to the first beam than the second position of the second support member, setting the fourth position of the second limiting member, closer to the first beam than the third position of the second restraint member; the second blade is provided with a second through hole adjacent to the second warp, the first limiting piece penetrates through the first limiting ring to form a first limiting ring, the second limiting piece penetrates through the second through hole to form a second limiting ring, and the second limiting piece penetrates through the second limiting ring after penetrating through the first limiting ring.

3. The blind of claim 1, wherein the plurality of support members includes a first support member and a second support member, the first support member being closer to the first beam than the second support member; the plurality of blades further comprise a second blade, the first blade is supported against the first supporting part, and the second blade is supported against the second supporting part; the plurality of constraining members further comprise a second constraining member disposed adjacent to the second supporting member, and the plurality of limiting members further comprise a second limiting member; on the second warp, setting the fourth position of the first limiting piece, closer to the first beam than the second position of the first supporting piece, setting the second position of the first supporting piece, closer to the first beam than the third position of the first restraining piece, setting the fourth position of the second limiting piece, closer to the first beam than the second position of the second supporting piece, setting the second position of the second supporting piece, closer to the first beam than the third position of the second restraining piece; the second blade is provided with a second through hole near the second warp, the first limiting piece penetrates through the first restraining ring to form a first limiting ring, the second restraining piece penetrates through the second through hole to form a second restraining ring, and the second limiting piece penetrates through the second restraining ring after penetrating through the first limiting ring.

4. The blind of claim 1, wherein the plurality of support members includes a first support member and a second support member, the first support member being closer to the first beam than the second support member; the plurality of blades further comprise a second blade, the first blade is supported against the first supporting part, and the second blade is supported against the second supporting part; the plurality of restraining members further comprise a second restraining member disposed adjacent to the second support member, and the plurality of limiting members further comprise a second limiting member; on the second warp, setting the third position of the first constraint piece, closer to the first beam than the second position of the first support piece, setting the second position of the first support piece, closer to the first beam than the fourth position of the first limit piece, setting the third position of the second constraint piece, closer to the first beam than the second position of the second support piece, setting the second position of the second support piece, closer to the first beam than the fourth position of the second limit piece; a second through hole is arranged at the position of the second blade, which is adjacent to the second warp; the second limiting piece penetrates through the second through hole to form a second limiting ring, the second limiting piece penetrates through the second limiting ring to form a second limiting ring, and the first limiting piece penetrates through the first limiting ring after penetrating through the second limiting ring.

5. The blind of claim 1, wherein the plurality of support members includes a first support member and a second support member, the first support member being closer to the first beam than the second support member; the plurality of blades further comprise a second blade, the first blade is supported against the first supporting part, and the second blade is supported against the second supporting part; the plurality of restraining members further comprise a second restraining member disposed adjacent to the second support member, and the plurality of limiting members further comprise a second limiting member; on the second warp, setting the second position of the first supporting piece, closer to the first beam than the third position of the first restraining piece, setting the third position of the first restraining piece, closer to the first beam than the fourth position of the first limiting piece, setting the second position of the second supporting piece, closer to the first beam than the third position of the second restraining piece, setting the third position of the second restraining piece, closer to the first beam than the fourth position of the second limiting piece; the second blade is provided with a second through hole adjacent to the second warp, the second constraint piece passes through the second through hole to form a second constraint ring, the second limit piece passes through the second constraint ring to form a second limit ring, and the first limit piece passes through the first constraint ring after passing through the second limit ring.

6. The blind of claim 1, wherein the plurality of supporting members includes a top supporting member, which is the supporting member of the plurality of supporting members closest to the first beam, the top supporting member including two adjustment units; the blades comprise a top blade, and the top blade is arranged between the two adjusting units.

7. The blind of claim 1, wherein the top vane has at least one recess corresponding to the first warp thread or the second warp thread.

8. The blind of any one of claims 1 to 5, further comprising a lifting mechanism, a pulling rope, and a plurality of positioning members, wherein each of the positioning members is disposed at intervals on at least one of the first warp and the second warp, the lifting mechanism is disposed on one of the first beam and the second beam, a first end of the pulling rope is connected to the lifting mechanism, a second end of the pulling rope extends to the other of the first beam and the second beam, a portion of the pulling rope between the first beam and the second beam passes through at least one of the positioning members, and the lifting mechanism is configured to release or retract the pulling rope according to a change in a distance between the first beam and the second beam.

9. The blind of claim 8, wherein each of the constraining member and the limiting member is annular, and the constraining member has a circumference smaller than a circumference of the limiting member.

10. The blind of claim 8, wherein each of the constraining members and each of the positioning members are annular and the positioning member has a circumference smaller than the circumference of the constraining member.

11. The blind of claim 8, wherein the lift mechanism is disposed on the second beam and the pull cord is connected to the first beam.

12. The blind of claim 8, wherein the lifting mechanism is disposed on the second beam, and the pull cord is connected to the steering mechanism.

13. The blind of claim 8, wherein the lift mechanism is disposed on the first beam and the second end of the pull cord is secured to the second beam.

14. The blind of claim 13, further comprising an anchor disposed on the second beam, wherein the first warp thread and the second warp thread are connected to the second beam via the anchor.

15. The blind of claim 14, wherein the plurality of position-limiting elements comprises a fixed position-limiting element, which is the position-limiting element of the plurality of position-limiting elements closest to the second beam, and the fixed position-limiting element is connected to the anchor along with the second end of the second warp.

16. The blind of claim 1, wherein the spacing between the third positions is the predetermined distance.

17. The blind of claim 1, wherein the spacing between the fourth positions is the predetermined distance.

18. The blind of claim 1, wherein each of the position-limiting members is ring-shaped, and the circumference of the position-limiting member is greater than twice the predetermined distance.

19. The blind of claim 1, wherein the plurality of restraints are integrally formed with the second warp thread.

20. The blind of claim 1, wherein the plurality of stop members are integrally formed with the second warp thread.

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