GB2477392A

GB2477392A - Vertical blind slat control mechanism

Info

Publication number: GB2477392A
Application number: GB1100858A
Authority: GB
Inventors: Chin-Chang Shi; Tien-Szu Hung
Original assignee: TAIWAN BAMBOO CURTAIN ENTERPRISE CO Ltd
Current assignee: TAIWAN BAMBOO CURTAIN ENTERPRISE CO Ltd
Priority date: 2011-01-19
Filing date: 2011-01-19
Publication date: 2011-08-03
Anticipated expiration: 2031-01-19
Also published as: GB2477392B; GB201100858D0

Abstract

A vertical blind includes a track (10 Fig 1), a plurality of carriers 20, 30, 40, 50 movably mounted on the track, and a plurality of laths or slats (11 Fig 1) mounted on the carriers. The odd numbers of carriers 20 40 are connected via distance adjustment strips 31 and are moved in concert with each other, and the even numbers of carriers 30 50 are connected via distance adjustment strips 21 41 and are moved in concert with each other, so that the odd numbers of carriers and the even numbers of carriers construct two drawing paths to facilitate expansion of the laths. Each carrier may have a through hole (22 Fig 3) to allow movement of the adjustment strip, the strip having a stop block 212 at one end to engage with the hole. The carriers may also have a passage way (23 Fig 3) to allow passageway of the alternate distance strip. An initial distance strip 21a may connect the first and second carriers 20 30 to one end of the blind track.

Description

VERTICAL BLIND

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a window covering and, more particularly, to a vertical blind for a window.

2. Description of the Related Art

A conventional vertical blind 90 for a window in accordance with the prior art shown in Figs. 13-16 comprises a track 91, a plurality of carriers (at least three carriers) movably mounted on the track 91, and a plurality of laths 95 mounted on the carriers to move in concert with the carriers. Preferably, the conventional vertical blind 90 mainly comprises a first carrier 92, a second carrier 93, and a third carrier 94. In addition, the conventional vertical blind 90 further comprises an operating cord 96 connected with the first carrier 92 to move the first carrier 92 so that the first carrier 92 is moved rightward or leftward by operation of the operating cord 96. In addition, the conventional vertical blind 90 further comprises two connecting strips 97 connected between the first carrier 92 and the second carrier 93 and between the second carrier 93 and the third carrier 94 respectively. Each of the connecting strips 97 has a length equal to "Dl". The first carrier 92 has a side provided with a first through hole 921. The second carrier 93 has a side provided with a second through hole 931. The third carrier 94 has a side provided with a third through hole 941. A first one of the connecting strips 97 is extended through the first through hole 921 and has a first end provided with a stop block 971 and a second end affixed to the second carrier 93. A second one of the connecting strips 97 is extended through the second through hole 931 and has a first end also provided with a stop block 971 and a second end affixed to the third carrier 94. The first carrier 92 is movable on the first one of the connecting strips 97 and is movable outward relative to the second carrier 93 to abut the stop block 971 of the first one of the connecting strips 97 so as to move the first one of the connecting strips 97 and the second carrier 93. The second carrier 93 is movable on the second one of the connecting strips 97 and is movable outward relative to the third carrier 94 to abut the stop block 971 of the second one of the connecting strips 97 so as to move the second one of the connecting strips 97 and the third carrier 94.

In operation, when the first carrier 92 is moved leftward by operation of the operating cord 96, the first carrier 92 is moved on the first one of the connecting strips 97 to abut the stop block 971 of the first one of the connecting strips 97 as shown in Fig. 15 so that the first one of the connecting strips 97 is moved by the first carrier 92, and the second carrier 93 is moved by the first one of the connecting strips 97. When the second carrier 93 is moved by the first one of the connecting strips 97, the second carrier 93 is moved on the second one of the connecting strips 97 to abut the stop block 971 of the second one of the connecting strips 97 as shown in Fig. 16 so that the second one of the connecting strips 97 is moved by the second carrier 93, and the third darner 94 is moved by the second one of the connecting strips 97. In such a manner, when the first carrier 92 is moved leftward by operation of the operating cord 96, the first carrier 92 pulls the second carrier 93 which pulls the third carrier 94 which pulls the following carrier. Thus, when the above procedures are repeated, all of the carriers are expanded respectively by connection of the connecting strips 97 so as to expand the laths 95 completely.

On the contrary, when the first carrier 92 is moved rightward by operation of the operating cord 96, the first carrier 92 is moved on the first one of the connecting strips 97 to abut the second carrier 93 which is moved on the second one of the connecting strips 97 to abut the third carrier 94 as shown in Fig. 14 which is moved to abut the following carrier. In such a manner, when the above procedures are repeated, all of the carriers are moved rightward to abut each other so as to fold the laths 95 completely.

However, when the carriers are expanded respectively, the distance between any two adjacent carriers has a constant value which is equal to the length "Dl" of each of the connecting strips 97 so that the distance between any two adjacent laths 95 is fixed and cannot be adjusted, thereby limiting the aesthetic quality of the laths 95, and thereby limiting the versatility of the conventional vertical blind 90.

BRIEF SUMMARY OF THE]NVENTION

In accordance with the present invention, there is provided a vertical blind, comprising a track, at least four carriers movably mounted on the track, and a plurality of laths mounted on the carriers to move in concert with the carriers. The vertical blind mainly comprises a first carrier, a second carrier, a third carrier, and a fourth carrier. The second carrier is disposed between the first carrier and the third carrier, and the third carrier is disposed between the second carrier and the fourth carrier. The first carrier is connected with a first distance adjustment strip. The first distance adjustment strip is connected with the third carrier so that the third carrier is movable in concert with the first carrier by connection of the first distance adjustment strip. The second carrier is connected with a second distance adjustment strip. The second distance adjustment strip is connected with the fourth carrier so that the fourth carrier is movable in concert with the second carrier by connection of the second distance adjustment strip.

The first distance adjustment strip passes through the second carrier so that when the third carrier is moved in concert with the first carrier, the second carrier is kept stationary without interfering with movement of the first carrier and the third carrier. The second distance adjustment strip passes through the third carrier so that when the fourth carrier is moved in concert with the second carrier, the third carrier is kept stationary without interfering with movement of the second carrier and the fourth carrier.

According to the primary advantage of the present invention, the odd numbers of carriers are moved in concert with each other, and the even numbers of carriers are moved in concert with each other, so that the odd numbers of carriers and the even numbers of carriers construct two drawing paths to facilitate expansion of the laths.

According to another advantage of the present invention, the odd numbers of carriers are moved toward the even numbers of carriers or the even numbers of carriers are moved toward the odd numbers of carriers so as to adjust the distance between the laths.

Further benefits arid advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWING(S) Fig. 1 is a partially perspective view of a vertical blind in accordance with the preferred embodiment of the present invention.

Fig. 2 is a partially exploded perspective view of the vertical blind as shown in Fig. 1.

Fig. 3 is a partially exploded perspective view of the vertical blind as shown in Fig. 1.

Fig. 4 is a locally enlarged view of the vertical blind as shown in Fig. 1.

Fig. 5 is a schematic operational view of the vertical blind as shown inFig.4.

Fig. 5a is a locally enlarged view of the vertical blind as shown in Fig. 5.

Fig. 6 is a front view of the vertical blind as shown in Fig. 5.

Fig. 7 is a top operational view of the vertical blind as shown in Fig. 1.

Fig. 8 is a schematic operational view of the vertical blind as shown inFig.1.

Fig. 9 is a schematic operational view of the vertical blind as shown in Fig. 8.

Fig. 10 is a partially exploded perspective view of a vertical blind in accordance with another preferred embodiment of the present invention.

Fig. 11 is a partially exploded perspective view of a vertical blind in accordance with another preferred embodiment of the present invention.

Fig. 12 is a partially perspective view of a vertical blind in accordance with another preferred embodiment of the present invention.

Fig. 12a is a locally enlarged view of the vertical blind as shown in Fig. 12.

Fig. 13 is a perspective view of a conventional vertical blind in

accordance with the prior art.

Fig. 14 is a partially perspective view of the conventional vertical blind as shown in Fig. 13.

Fig. 15 is a schematic operational view of the conventional vertical blind as shown in Fig. 14.

Fig. 16 is a schematic operational view of the conventional vertical blind as shown in Fig. 15.

DETAILED DESCRIPTION OF THE INVENTION

Referring to the drawings and initially to Figs. 1-3, a vertical blind for a window in accordance with the preferred embodiment of the present invention comprises a track 10, a plurality of carriers (at least four carriers) movably mounted on the track 10, and a plurality of laths 11 mounted on the carriers to move in concert with the carriers. The track 10 has an elongate shape and has an opening directed downward.

As shown in Fig. 1, the carriers consist of a first carrier 20, a second carrier 30, a third carrier 40, a fourth carrier 50, a fifth carrier B, a sixth carrier Bi, a seventh carrier B2, a eighth carrier B3, a ninth carrier B4, a tenth carrier B5, and a eleventh carrier B6. Thus, the first carrier 20, the third carrier 40, the fifth carrier B, the seventh carrier B2, the ninth carrier B4, and the eleventh carrier B6 construct odd numbers of carriers, and the second carrier 30, the fourth carrier 50, the sixth carrier B 1, the eighth carrier B3, and the tenth carrier B5 construct even numbers of carriers.

In the preferred embodiment of the present invention, for explanation, the vertical blind mainly comprises a first carrier 20, a second carrier 30, a third carrier 40, and a fourth carrier 50. The second carrier 30 is disposed between the first carrier 20 and the third carrier 40, and the third carrier 40 is disposed between the second carrier 30 and the fourth carrier 50.

The first carrier 20 is connected with a first distance adjustment strip 21. The first distance adjustment strip 21 is connected with the third carrier 40 so that the third carrier 40 is movable in concert with the first carrier 20 by connection of the first distance adjustment strip 21. The first distance adjustment strip 21 passes through the second carrier 30 so that when the third carrier 40 is moved in concert with the first carrier 20, the second carrier 30 is kept stationary without interfering with movement of the first carrier 20 and the third carrier 40.

The first carrier 20 has a side provided with a first through hole 22 to allow passage of the first distance adjustment strip 21 and has a face provided with a first passage 23 located beside the first through hole 22. The first distance adjustment strip 21 is extended through the first through hole 22 and has a first end 211 provided with a first stop block 212 and a second end 210 affixed to the third carrier 40. The first carrier 20 is movable on the first distance adjustment strip 21 and is movable outward relative to the second carrier 30 to abut the first stop block 212 so as to move the first distance adjustment strip 21 and the third carrier 40.

The second carrier 30 is connected with a second distance adjustment strip 31. The second distance adjustment strip 31 is connected with the fourth carrier 50 so that the fourth carrier 50 is movable in concert with the second carrier 30 by connection of the second distance adjustment strip 31. The second distance adjustment strip 31 passes through the third carrier 40 so that when the fourth carrier 50 is moved in concert with the second carrier 30, the third carrier 40 is kept stationary without interfering with movement of the second carrier 30 and the fourth carrier 50.

The second carrier 30 has a side provided with a second through hole 32 to allow passage of the second distance adjustment strip 31 and has a face provided with a second passage 33 located beside the second through hole 32 to allow passage of the first distance adjustment strip 21. The second distance adjustment strip 31 is extended through the second through hole 32 and has a first end 311 provided with a second stop block 312 and a second end 310 affixed to the fourth carrier 50. The second carrier 30 is movable on the second distance adjustment strip 31 and is movable outward relative to the third carrier to abut the second stop block 312 so as to move the second distance adjustment strip 31 and the fourth carrier 50.

The third carrier 40 has a structure the same as that of the first carrier 20. The third carrier 40 is connected with a third distance adjustment strip 41.

The third distance adjustment strip 41 has a structure the same as that of the first distance adjustment strip 21. The third distance adjustment strip 41 passes through the fourth carrier 50. The third carrier 40 has a side provided with a third through hole 42 to allow passage of the third distance adjustment strip 41 and has a face provided with a third passage 43 located beside the third through hole 42 to allow passage of the second distance adjustment strip 31. The third distance adjustment strip 41 is extended through the third through hole 42 and has a first end 411 provided with a third stop block 412. The third distance adjustment strip 41 has a second end 410. The third carrier 40 is movable on the third distance adjustment strip 41 and is movable outward relative to the fourth carrier 50 to abut the third stop block 412 so as to move the third distance adjustment strip 41.

The fourth carrier 50 has a structure the same as that of the second carrier 30. The fourth carrier 50 is connected with a fourth distance adjustment strip 51. The fourth distance adjustment strip 51 has a structure the same as that of the second distance adjustment strip 31. The fourth distance adjustment strip 51 passes through the fourth carrier 50. The fourth carrier 50 has a side provided with a fourth through hole 52 to allow passage of the fourth distance adjustment strip 51 and has a face provided with a fourth passage 53 located beside the fourth through hole 52 to allow passage of the third distance adjustment strip 41. The fourth distance adjustment strip 51 is extended through the fourth through hole 52 and has a first end 511 provided with a fourth stop block 512. The fourth distance adjustment strip 51 has a second end 510. The fourth carrier 50 is movable on the fourth distance adjustment strip 51 and is movable to abut the fourth stop block 512 so as to move the fourth distance adjustment strip 51.

The first carrier 20 is further connected with an initial distance adjustment strip 21a (see Figs. 5 and 5a). The initial distance adjustment strip 21a is connected with the second carrier 30 so that the second carrier 30 is movable in concert with the first carrier 20 by connection of the initial distance adjustment strip 21a. The initial distance adjustment strip 21a is extended through the first carrier 20 and has a first end 211 a provided with a protruding stop portion 212a and a second end 210a affixed to the second carrier 30. The first carrier 20 is movable on the initial distance adjustment strip 21 a and is movable outward relative to the second carrier 30 to abut the stop portion 2 12a so as to move the initial distance adjustment strip 21a and the second carrier 30.

The initial distance adjustment strip 21 a has a length smaller than that of the first distance adjustment strip 21. Thus, the second carrier 30 is moved by the first carrier 20 through the initial distance adjustment strip 21 a before the third carrier 40 is moved by the first carrier 20 through the first distance adjustment strip 21.

In the preferred embodiment of the present invention, the vertical blind further comprises an operating member 60 connected with the first carrier 20 to move the first carrier 20 so that the first carrier 20 is moved rightward or lefiward by operation of the operating member 60. Preferably, the operating member 60 is an operating cord. In addition, the vertical blind further comprises an adjusting member 80 connected with one of the odd carriers or one of the even carriers to move the odd carriers relative to the even carriers respectively or to move the even carriers relative to the odd carriers respectively. In addition, the vertical blind further comprises an angle adjusting mechanism 70 connected with each of the carriers to adjust the angle of each of the laths 11.

In operation, referring to Figs. 5 and 6 with reference to Figs. 1-4, when the first carrier 20 is moved lefiward by operation of the operating member 60, the first carrier 20 is moved on the first distance adjustment strip 21 and the initial distance adjustment strip 21 a. When the first carrier 20 is moved on the initial distance adjustment strip 21 a to abut the stop portion 21 2a, the initial distance adjustment strip 21 a is moved by the first carrier 20, and the second carrier 30 is moved by the initial distance adjustment strip 21 a. In such a manner, the second carrier 30 is moved on the second distance adjustment strip 31 and is moved to abut the second stop block 312 so that the second distance adjustment strip 31 is moved by the second carrier 30, and the fourth carrier 50 is moved by the second distance adjustment strip 31. Thus, the second carrier 30, the fourth carrier 50 and the following even carriers are moved leftward when the initial distance adjustment strip 21 a is moved by the first carrier 20, so that the second carrier 30, the fourth carrier 50 and the following even carriers are expanded as shown in Fig. 5. In addition, when the first carrier 20 is moved on the first distance adjustment strip 21 to abut the first stop block 212, the first distance adjustment strip 21 is moved by the first carrier 20, and the third carrier 40 is moved by the first distance adjustment strip 21. Thus, the third carrier 40 and the following odd carriers are moved leftward when the first carrier 20 is moved, so that the first carrier 20, the third carrier 40 and the following odd carriers are expanded as shown in Fig. 5. In conclusion, when the first carrier 20 is moved leftward by operation of the operating member 60, the third carrier 40 and the following odd carriers are moved with the first carrier 20, while the fourth carrier 50 and the following even carriers are moved with the second carrier 30, so that the odd carriers and the even carriers are expanded respectively as shown in Fig. 5 so as to expand the laths 11 completely as shown in Fig. 6.

On the contrary, when the first carrier 20 is moved rightward by operation of the operating member 60, the first carrier 20 is moved on the first distance adjustment strip 21 to abut the second carrier 30 which is moved on the second distance adjustment strip 31 to abut the third carrier 40 which is moved on the third distance adjustment strip 41 to abut the fourth carrier 50 which is moved on the fourth distance adjustment strip 51 to abut the following carrier. In such a manner, the first carrier 20, the second carrier 30, the third carrier 40, the fourth carrier 50 and the following carriers are moved rightward to abut each other as shown in Fig. 4 so as to fold the laths 11 completely as shown in Fig. 1.

As shown in Figs. 7 and 8, the even carriers are moved toward the odd carriers respectively by operation of the adjusting member 80 so as to adjust the distance between the even carriers and the odd carriers respectively and to adjust the distance between any two laths 11. Thus, the second carrier 30 is moved toward the third carrier 40, the fourth carrier 50 is moved toward the fifth carrier B, the sixth carrier Bi is moved toward the seventh carrier B2, the eighth carrier B3 is moved toward the ninth carrier B4, and the tenth carrier B5 is moved toward the eleventh carrier B6. Alternatively, the odd carriers are moved toward the even carriers respectively by operation of the adjusting member 80 so as to adjust the distance between the odd carriers and the even carriers respectively and to adjust the distance between any two laths 11.

As shown in Figs. 8 and 9, the angle adjusting mechanism 70 is operated by a ball chain 71 to swivel each of the laths 11 so as to adjust the angle of each of the laths 11.

As shown in Fig. 10, the first carrier 20b and the first distance adjustment strip 2 lb have different shapes.

As shown in Fig. 11, the first carrier 20c and the first distance adjustment strip 21c have different shapes.

As shown in Figs. 12 and 12a, the operating member 60d is an operating rod.

Accordingly, the odd numbers of carriers are moved in concert with each other, and the even numbers of carriers are moved in concert with each other, so that the odd numbers of carriers and the even numbers of carriers construct two drawing paths to facilitate expansion of the laths 11. In addition, the odd numbers of carriers are moved toward the even numbers of carriers or the even numbers of carriers are moved toward the odd numbers of carriers so as to adjust the distance between the laths 11.

Although the invention has been explained in relation to its preferred embodiment(s) as mentioned above, it is to be understood that many other possible modifications and variations can be made without departing from the scope of the present invention. It is, therefore, contemplated that the appended claim or claims will cover such modifications and variations that fall within the true scope of the invention.

Claims

CLAIMS1. A vertical blind, comprising: a track; at least four carriers movably mounted on the track; and a plurality of laths mounted on the carriers to move in concert with the carriers; wherein the vertical blind mainly comprises a first carrier, a second carrier, a third carrier, and a fourth carrier; the second carrier is disposed between the first carrier and the third carrier; the third carrier is disposed between the second carrier and the fourth carrier; the first carrier is connected with a first distance adjustment strip; the first distance adjustment strip is connected with the third carrier so that the third carrier is movable in concert with the first carrier by connection of the first distance adjustment strip; the second carrier is connected with a second distance adjustment strip; the second distance adjustment strip is connected with the fourth carrier so that the fourth carrier is movable in concert with the second carrier by connection of the second distance adjustment strip.
2. The vertical blind of claim 1, wherein the first distance adjustment strip passes through the second carrier so that when the third carrier is moved in concert with the first carrier, the second carrier is kept stationary without interfering with movement of the first carrier and the third carrier; the second distance adjustment strip passes through the third carrier so that when the fourth carrier is moved in concert with the second carrier, the third carrier is kept stationary without interfering with movement of the second carrier and the fourth carrier.
3. The vertical blind of claim 1, wherein the first carrier has a side provided with a first through hole to allow passage of the first distance adjustment strip; the first distance adjustment strip is extended through the first through hole and has a first end provided with a first stop block and a second end affixed to the third carrier; the first carrier is movable on the first distance adjustment strip and is movable outward relative to the second carrier to abut the first stop block so as to move the first distance adjustment strip and the third carrier.
4. The vertical blind of claim 3, wherein the second carrier has a side provided with a second through hole to allow passage of the second distance adjustment strip; the second distance adjustment strip is extended through the second through hole and has a first end provided with a second stop block and a second end affixed to the fourth carrier; the second carrier is movable on the second distance adjustment strip and is movable outward relative to the third carrier to abut the second stop block so as to move the second distance adjustment strip and the fourth carrier.
5. The vertical blind of claim 4, wherein the third carrier is connected with a third distance adjustment strip; the third distance adjustment strip passes through the fourth carrier; the third carrier has a side provided with a third through hole to allow passage of the third distance adjustment strip; the third distance adjustment strip is extended through the third through hole and has an end provided with a third stop block; the third carrier is movable on the third distance adjustment strip and is movable outward relative to the fourth carrier to abut the third stop block so as to move the third distance adjustment strip.
6. The vertical blind of claim 5, wherein the fourth carrier is connected with a fourth distance adjustment strip; the fourth distance adjustment strip passes through the fourth carrier; the fourth carrier has a side provided with a fourth through hole to allow passage of the fourth distance adjustment strip; the fourth distance adjustment strip is extended through the fourth through hole and has a first end provided with a fourth stop block; the fourth carrier is movable on the fourth distance adjustment strip and is movable to abut the fourth stop block so as to move the fourth distance adjustment strip.
7. The vertical blind of claim 6, wherein the first carrier has a face provided with a first passage located beside the first through hole; the second carrier has a face provided with a second passage located beside the second through hole to allow passage of the first distance adjustment strip; the third carrier has a face provided with a third passage located beside the third through hole to allow passage of the second distance adjustment strip; the fourth carrier has a face provided with a fourth passage located beside the fourth through hole to allow passage of the third distance adjustment strip.
8. The vertical blind of claim 3, wherein the first carrier is further connected with an initial distance adjustment strip; the initial distance adjustment strip is connected with the second carrier so that the second carrier is movable in concert with the first carrier by connection of the initial distance adjustment strip; the initial distance adjustment strip is extended through the first carrier; the initial distance adjustment strip has a length smaller than that of the first distance adjustment strip; the second carrier is moved by the first carrier through the initial distance adjustment strip before the third carrier is moved by the first carrier through the first distance adjustment strip.
9. The vertical blind of claim 8, wherein the initial distance adjustment strip has a first end provided with a protruding stop portion and a second end affixed to the second carrier; the first carrier is movable on the initial distance adjustment strip and is movable outward relative to the second carrier to abut the stop portion so as to move the initial distance adjustment strip and the second carrier.
10. The vertical blind of claim 6, wherein the third carrier has a structure the same as that of the first carrier; the fourth carrier has a structure the same as that of the second carrier; the third distance adjustment strip has a structure the same as that of the first distance adjustment strip; the fourth distance adjustment strip has a structure the same as that of the second distance adjustment strip.
11. A vertical blind substantially as hereinbefore described with reference to and as shown in Figures 1 to 12a of the accompanying drawings.AMENDMENTS TO THE CLAIMS HAVE BEEN FILED AS FOLLOWSCLAIMS1. A vertical blind, comprising: a track; at least four carriers movably mounted on the track; and a plurality of laths mounted on the carriers to move in concert with the carriers; wherein the vertical blind comprises a first carrier, a second carrier, a third carrier, and a fourth carrier; the second carrier is disposed between the first carrier and the third carrier; the third carrier is disposed between the second carrier and the fourth carrier; the first carrier is connected with a first distance adjustment strip; the first distance adjustment strip is connected with the third carrier so that the third carrier is movable in concert with the first carrier by connection of the first distance adjustment strip; the second carrier is connected with a second distance adjustment *...,: strip; * . * the second distance adjustment strip is connected with the fourth * ** ** * . *** 20 carrier so that the fourth carrier is movable in concert with the second carrier by connection of the second distance adjustment strip. * S...*:. 2. The vertical blind of claim 1, wherein the first distance adjustment strip passes through the second carrier so that when the third carrier is moved in concert with the first carrier, the second carrier is kept stationary without interfering with movement of the first carrier and the third carrier; the second distance adjustment strip passes through the third carrier so that when the fourth carrier is moved in concert with the second carrier, the third carrier is kept stationary without interfering with movement of the second carrier and the fourth carrier.3. The vertical blind of claim 1, wherein the first carrier has a side provided with a first through hole to allow passage of the first distance adjustment strip; the first distance adjustment strip is extended through the first through hole and has a first end provided with a first stop block and a second end affixed to the third carrier; the first carrier is movable on the first distance adjustment strip and is movable outward relative to the second carrier to abut the first stop block so as to move the first distance adjustment strip and the third carrier.4. The vertical blind of claim 3, wherein the second carrier has a side provided with a second through hole to allow passage of the second distance adjustment strip; the second distance adjustment strip is extended through the second through hole and has a first end provided with a second stop block and a second end affixed to the fourth carrier; the second carrier is movable on the second distance adjustment strip and is movable outward relative to the third carrier to abut the second stop block so as to move the second distance adjustment strip and the fourth carrier.5. The vertical blind of claim 4, wherein the third carrier is connected with a third distance adjustment strip; the third distance adjustment strip passes through the fourth carrier; the third carrier has a side provided with a third through hole to allow passage of the third distance adjustment strip; the third distance adjustment strip is extended through the third through hole and has an end provided with a third stop block; the third carrier is movable on the third distance adjustment strip and is movable outward relative to the fourth carrier to abut the third stop block so as to move the third distance adjustment strip.6. The vertical blind of claim 5, wherein the fourth carrier is connected with a fourth distance adjustment strip; the fourth distance adjustment strip passes through the fourth carrier; the fourth carrier has a side provided with a fourth through hole to allow passage of the fourth distance adjustment strip; the fourth distance adjustment strip is extended through the fourth through hole and has a first end provided with a fourth stop block; the fourth carrier is movable on the fourth distance adjustment strip and is movable to abut the fourth stop block so as to move the fourth distance adjustment strip.7. The vertical blind of claim 6, wherein the first carrier has a face provided with a first passage located beside the first through hole; the second carrier has a face provided with a second passage located beside the second through hole to allow passage of the first distance adjustment strip; the third carrier has a face provided with a third passage located beside the third through hole to allow passage of the second distance adjustment strip; the fourth carrier has a face provided with a fourth passage located beside the fourth through hole to allow passage of the third distance adjustment strip.8. The vertical blind of claim 3, wherein the first carrier is further connected with an initial distance adjustment strip; the initial distance adjustment strip is connected with the second carrier so that the second carrier is movable in concert with the first carrier by connection of the initial distance adjustment strip; the initial distance adjustment strip is extended through the first carrier; the initial distance adjustment strip has a length smaller than that of the first distance adjustment strip; the second carrier is moved by the first carrier through the initial distance adjustment strip before the third carrier is moved by the first carrier through the first distance adjustment strip.9. The vertical blind of claim 8, wherein the initial distance adjustment strip has a first end provided with a protruding stop portion and a second end affixed to the second carrier; the first carrier is movable on the initial distance adjustment strip and is movable outward relative to the second carrier to abut the stop portion so as to move the initial distance adjustment strip and the second carrier.10. The vertical blind of claim 6, wherein the third carrier has a structure the same as that of the first carrier; the fourth carrier has a structure the same as that of the second carrier; the third distance adjustment strip has a structure the same as that of the first distance adjustment strip; the fourth distance adjustment strip has a structure the same as that of the second distance adjustment strip.11. A vertical blind substantially as hereinbefore described with reference to and as shown in Figures 1 to 12a of the accompanying drawings.