Window blind with controlling axle

The present invention relates to a controlling shaft, and more particularly to a controlling shaft for controlling blind, comprising a transverse shaft and a plurality of shaft controlling unit provided on the transverse shaft in turn. Due to the connecting relationship between the plurality of shaft controlling units and the transverse shaft, when the transverse shaft rotates, the plurality of shaft controlling units can synchronously rotate with the transverse shaft. Each shaft controlling unit of the plurality of shaft controlling units comprises a plurality of rotating members. When the shaft controlling unit rotates with the transverse shaft, the rotating members of each shaft controlling unit move in different pace. With the synchronous movement of the shaft controlling units with the transverse shaft, the particular points on the outer side of respective plurality of rotating members of any shaft controlling unit at the same level move to different extents.

BACKGROUND OF THE PRESENT INVENTION

1. Field of Invention

The present invention relates to a controlling shaft, and more particularly to a controlling shaft for controlling blind, comprising a transverse shaft and a plurality of shaft controlling unit provided on the transverse shaft in turn. Due to the connecting relationship between the plurality of shaft controlling units and the transverse shaft, when the transverse shaft rotates, the plurality of shaft controlling units can synchronously rotate with the transverse shaft. Each shaft controlling unit of the plurality of shaft controlling units comprises a plurality of rotating members. When the shaft controlling unit rotates with the transverse shaft, the rotating members of each shaft controlling unit move in different pace. With the synchronous movement of the shaft controlling units with the transverse shaft, the particular points on the outer side of respective plurality of rotating members of any shaft controlling unit at the same level move to different extents.

2. Description of Related Arts

As we all know, with the development of the society and the increasing demand for convenience of daily appliance, all kinds of appliances are developed, wherein the blind as one of the appliances is becoming more and more popular.

The curtain is very important in daily life. The traditional curtain is usually hung on the window in the house to block the lights in the day or to keep the in-house environment from being seen at outside at night.

The traditional curtain usually comprises a curtain frame and a curtain cloth provided on the curtain frame. When people want to block the light, hang the curtain cloth on the window via the curtain frame. However, folding and unfolding the traditional curtain is very inconvenient.

Then a kind of Persian blind is developed, which comprises a plurality of slats and a controlling shaft, wherein each slat is made of board shaped material, and the slats are connected in series via a controlling lift cord from top to bottom and are hung on the controlling shaft, so that the plurality of slats can switch between a horizontal status and a vertical status. In a horizontal status, the blind allows lights passing through, so that the user can observe the outside through the gap between the slats. When the user changes the slats from the horizontal status to vertical status via the controlling shaft, the slats can block the lights from the outside. The user can control the controlling shaft to switch the slats between the horizontal status and the vertical status, so as to control the blind.

In the above mentioned blind, it is the controlling shaft to connect the plurality of slats via the lift cord, which means when the user controls the controlling shaft, the slats rotate in the same pace. However, in some cases, the slats are required to rotate in different pace, so that the traditional blind can not meet this requirement, which is the main drawback of the traditional blind.

SUMMARY OF THE PRESENT INVENTION

The present invention is to provide a controlling shaft for controlling blind to overcome the above drawbacks.

A main object of the present invention is to provide a controlling shaft for controlling blind, which can control the slats of the blind rotating in different paces, so as to improve the performance of the blind.

Accordingly, in order to accomplish the above object, the present invention provides a controlling shaft for controlling blind. The blind comprises a cord lifting unit and a slat unit. The cord lifting unit comprises a plurality of lift cords, each of the lift cords has two controlling cords and a plurality of fixing cords, wherein two controlling cords are corresponding to each other, and a distance is between the two controlling cords. The fixing cords are provided between the two controlling cords from top to bottom, and a distance is between two neighbor fixing cords. Furthermore, each fixing cord comprises two or more transverse cords, and two neighbor transverse cords defines a fixing cavity. The slat unit is provided on the cord lifting unit, comprising a plurality of slat systems, and each slat systems is corresponding to a lift cord. Each slat system comprises a plurality of slats, and slats of a slat system are connected with the lift cord of the cord lifting unit from top to bottom.

The controlling shaft for controlling blind is provided on the beam of the blind, comprising a transverse shaft and a plurality of shaft controlling units, wherein the plurality of shaft controlling units is provided on the transverse shaft in turn. Due to the connecting relationship between the plurality of shaft controlling units and the transverse shaft, when the transverse shaft rotates, the plurality of shaft controlling units can synchronously rotate with the transverse shaft. Each shaft controlling unit of the plurality of shaft controlling units comprises a plurality of rotating members. When the shaft controlling unit rotates with the transverse shaft, the rotating members of the shaft controlling units move in different pace. With the synchronous movement of the shaft controlling units with the transverse shaft, the particular points on the outer side of respective plurality of rotating members of any shaft controlling unit at the same level move to different extents. In addition, the outer shape of the plurality of rotating members approximate to a column. The longitudinal axis of the plurality of rotating members that approximate to column is coincidence with the longitudinal axis of the transverse shaft, so that the rotating members rotate stably when rotating with the transverse shaft. The circumstances of the outer surface of each two rotating member of the plurality of rotating members are different with each other, so that when the plurality of shaft controlling units rotate synchronously with the transverse shaft to drive the plurality of rotating members to rotate, that is to say when the transverse shaft turns an angle, the plurality of rotating members turn the same angle, the particular points on the outer side of respective plurality of rotating members of any shaft controlling unit at the same level move to different extents. Each rotating member has a cord clap or a cord retaining hole provided thereon. The plurality of shaft controlling units are connected with the cord lifting unit of the blind, and furthermore, each rotating member of the plurality of shaft controlling units is connected with a lift cord of the cord lifting unit respectively. The slat unit is provided on the cord lifting unit, and each slat system of the slat unit is corresponding to a lift cord of the cord lifting unit. Each slat system comprises a plurality of slats, and the slats of the slat system are connected with a lift cord of the cord lifting unit from top to bottom. Due to the relationship between the rotating members, lift cords and the slats, the operation status of the slats can be controlled via the rotating members. The upper end of any group of lift cords of the cord lifting unit is fixed in the cord clap of the rotating member of the shaft controlling unit.

The benefit of the present invention is illustrated as follows. The controlling shaft for controlling blind comprises a transverse shaft and a plurality of shaft controlling units, wherein the plurality of shaft controlling units is provided on the transverse shaft in turn. Due to the connecting relationship between the plurality of shaft controlling units and the transverse shaft, when the transverse shaft rotates, the plurality of shaft controlling units can synchronously rotate with the transverse shaft. Each shaft controlling unit of the plurality of shaft controlling units comprises a plurality of rotating members. When the shaft controlling unit rotates with the transverse shaft, the rotating members of the shaft controlling units move in different pace. With the synchronous movement of the shaft controlling units with the transverse shaft, the particular points on the outer side of respective plurality of rotating members of any shaft controlling unit at the same level move to different extents. Therefore, the controlling shaft can control the slats of the blind rotating in different paces, so as to improve the performance of the blind.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring toFIG. 1throughFIG. 7of the drawings, a controlling shaft50is used for controlling a blind according to a preferred embodiment of the present invention is illustrated, in which the blind comprises a cord lifting unit10, a slat unit20and a beam70.

The cord lifting unit10comprises a plurality of lift cords11, each of the lift cords has two controlling cords12and a plurality of fixing cords13, wherein two controlling cords12are corresponding to each other, and a distance121is between the two controlling cords12, and a distance131is between two neighbor fixing cords13.

Furthermore, each fixing cord13comprises two or more transverse cords132, and two neighbor transverse cords132defines a fixing cavity133, wherein the space between two neighbor fixing cavities is larger than two neighbor controlling cords12.

The slat unit20is provided on the cord lifting unit10, comprising a plurality of slat systems21, wherein each slat system21is corresponding to a lift cord11of the cord lifting unit, and each slat system21comprises a plurality of slats22.

The plurality of slats22of a slat system21are connected with the lift cord11of the cord lifting unit10from top to bottom.

The controlling shaft50for controlling blind is provided on the beam70of the blind, comprising a transverse shaft30and a plurality of shaft controlling units40, wherein the plurality of shaft controlling units40is provided on the transverse shaft30in turn.

Due to the connecting relationship between the plurality of shaft controlling units40and the transverse shaft30, when the transverse shaft30rotates, the plurality of shaft controlling units40can synchronously rotate with the transverse shaft30.

Each shaft controlling unit40of the plurality of shaft controlling units40comprises a plurality of rotating members41. When the shaft controlling unit40rotates with the transverse shaft30, the rotating members41of each shaft controlling unit40move in different pace. With the synchronous movement of the shaft controlling units40with the transverse shaft30, the particular points on the outer side of respective plurality of rotating members41of any shaft controlling unit40at the same level move to different extents.

In addition, the outer shape of the plurality of rotating members41approximates to a column. The longitudinal axis of the plurality of rotating members41that approximates to column is coincidence with the longitudinal axis of the transverse shaft30, so that the rotating members41rotate stably when rotating with the transverse shaft30.

The circumstances of the outer surface of each two rotating member41of the plurality of rotating members41are different with each other, so that when the plurality of shaft controlling units40rotate synchronously with the transverse shaft30to drive the plurality of rotating members41to rotate, that is to say when the transverse shaft30turns an angle, the plurality of rotating members41turn the same angle, the particular points on the outer side of respective plurality of rotating members41of any shaft controlling unit40at the same level move to different extents.

The plurality of rotating members comprise a plurality of large wheels and a plurality of small wheels, wherein the circumstance proportion of the large wheel and small wheel is determined by the switching speed of the blind.

Each rotating member41has a cord retaining hole411provided thereon.

The plurality of shaft controlling units40are connected with the cord lifting unit10of the blind, and furthermore, each rotating member41of the plurality of shaft controlling units40is connected with a lift cord11of the cord lifting unit10respectively.

The slat unit20is provided on the cord lifting unit10, and each slat system21of the slat unit20is corresponding to a lift cord11of the cord lifting unit10. Each slat system21comprises a plurality of slats22, and the plurality of slats22of the slat system21are connected with a lift cord11of the cord lifting unit10from top to bottom.

Due to the relationship between the rotating members41, lift cords11and the slats22, the operation status of the slats22can be controlled via the rotating members41.

The upper end of any group of lift cords11of the cord lifting unit10is fixed in the cord clap411of the rotating member41of the shaft controlling unit40.

As shown inFIG. 8, a preferred embodiment of the present invention is illustrated. A controlling shaft50A for controlling blind is provided on a beam of the blind, comprising a transverse shaft30A and a plurality of shaft controlling units40A, wherein the plurality of shaft controlling units40A are provided on the transverse shaft30A in turn.

Each shaft controlling units40A comprise a large wheel411A and a small wheel412A, wherein the diameter of the large wheel is larger than the diameter of the small wheel.

The blind comprises a cord lifting unit10A and a slat unit20A.

The cord lifting unit10A comprises a plurality of lift cords11A, each of the lift cords has two controlling cords12A and a plurality of fixing cords13A, wherein two controlling cords12A are corresponding to each other, and a distance121A is between the two controlling cords12A, and a distance13A1is between two neighbor fixing cords13A.

The slat unit20A is provided on the cord lifting unit10A, comprising a plurality of slat systems21. Each slat system21A is corresponding to a lift cord11A of the cord lifting unit10A, and each slat system21A comprises a plurality of slats22A.

The slats22A of the slat system21A are connected with a lift cord11A of the cord lifting unit10A from top to bottom.

The upper end of the plurality of lift cords11A of the cord lifting unit10A are fixedly connected to the plurality of shaft controlling units40A of the controlling shaft50A respectively.

Two of the lift cords of the cord lifting unit10A become one group, and fixedly connected the large wheel411A and small wheel412A of the shaft controlling units40A respectively.

When the transverse shaft30A of the controlling shaft50A rotates, the plurality of controlling shafts40A are driven to rotate together. Because the diameter of the larger wheel411A is larger than the diameter of the small wheel412A, the lifting speed of the lift cord11A connected with the large wheel411A is faster than the lifting speed of the lift cord11A connected with the small wheel412A.

At the same time, the lifting speed of the plurality of slats22A of the slat system21A on the lift cord11A connected with the larger wheel411A is larger than the lifting speed of the plurality of slats22A of the slat system21A on the lift cord11A connected with the small wheel412A.

Thus, a displacement difference is produced between the slats22A of the slat system21A on the lift cord11A connected with the larger wheel411A and the slats22A of the slat system21A on the lift cord11A connected with the small wheel412A.

As shown inFIG. 9andFIG. 10, another preferred embodiment of the present invention is illustrated. A controlling shaft50B for controlling blind is provided on a beam of the blind, comprising a transverse shaft30B and a plurality of shaft controlling units40B, wherein the plurality of shaft controlling units40B are provided on the transverse shaft30A in turn.

Each shaft controlling units40B comprise a large wheel411B and a small wheel412B, wherein the diameter of the large wheel is larger than the diameter of the small wheel.

Furthermore, the small wheel412B is placed between the larger wheel groups411A.

The blind comprises a cord lifting unit10B and a slat unit20B.

The cord lifting unit10B comprises a plurality of lift cord groups11B and a plurality of lift belt groups12B. The number of the lift cord groups11B and the lift belt groups12B are same.

Each of the lift cord group11B comprises two controlling cords112B and a plurality of fixing cords113B. The two controlling cords112B are corresponding to each other. A space114B is provided between the two controlling cords112B. The fixing cords113B are provided between two controlling cords112B from top to bottom. A space115B is provided between two neighboring fixing cords113B.

Each lift belt group12B comprises two controlling belts122B and a plurality of fixing belts123B. The two controlling belts122B are corresponding to each other. A space124B is provided between the two controlling belts122B. The fixing belts123B are provided between two controlling belts122B from top to bottom. A space125B is provided between two neighboring fixing belts123B.

The slat unit20B is provided on the cord lifting unit10B, comprising a plurality of slat systems21B, wherein each slat system21B is corresponding to a lift cord group11B or a lift belt group12B of the cord lifting unit, and each slat system21B comprises a plurality of slats22B.

The plurality of slats22B of a slat system21B are connected with the lift cord group11B or a lift belt group12B of the cord lifting unit10from top to bottom.

The upper end of the lift cord groups11B and the lift belt group12B of the cord lifting unit10B are fixedly connected to the plurality of shaft controlling units40B of the controlling shaft50B respectively.

A lift cord group11B and a lift belt group12B of the cord lifting unit10A become one group, and fixedly connected the small wheel412B and large wheel411B of the shaft controlling units40B respectively.

When the transverse shaft30B of the controlling shaft50B rotates, the plurality of controlling shafts40B are driven to rotate together. Because the diameter of the larger wheel411B is larger than the diameter of the small wheel412B, the lifting speed of the lift belt group12B connected with the large wheel411B is faster than the lifting speed of the lift cord group11B connected with the small wheel412B.

At the same time, the lifting speed of the plurality of slats22B of the slat system21B on the lift belt12B connected with the larger wheel411B is faster than the lifting speed of the plurality of slats22A of the slat system21A on the lift cord group11B connected with the small wheel412B.

Thus, a displacement difference is produced between the slats22B of the slat system21B on the lift belt group12B connected with the larger wheel411B and the slats22A of the slat system21A on the lift cord group11B connected with the small wheel412B.

In the embodiments described above, the transverse shaft30(30A,30B) is driven to rotate via electrical power or mechanical transmission automatically or manually, so as to drive the shaft controlling unit40(40A,40B) to rotate, so that the particular points on respective plurality of rotating members of any shaft controlling unit40(40A,40B) at the same level move to different extents.