The present invention relates to an electric window curtain, and more particularly, to a scrolling unit of an electric window curtain.
Electric window curtains have become very popular in recent years. Not only are there no ropes to prevent accidents, but also the curtains can be opened or closed through electronic control.
Most of the transmission devices of electric window curtains are installed in the top rail of the electric curtain. However, there could be no room for assembly of the top rail that may occupies a certain room because the transmission device received in the top rail. In addition, the transmission device in the top rail, it requires equipment to support the parts when installing, and this may cause inconvenience maintenance in the feature.
Most of the electric window curtains use a motor to drive the shaft to operate the ropes. When the curtain is blocked by objects, it causes uneven release of the rope, which may further cause the ropes to be entangled and knotted.
The present invention intends to provide a scrolling unit of an electric window curtain to ensure that the curtain is smoothly operated and to eliminate the shortcomings mentioned above.
The present invention relates to a window curtain and comprises a top rail, a bottom rail, a curtain connected between the top rail and the bottom rail, a transmission unit and a scrolling unit. The transmission unit and the scrolling unit are both located in the bottom rail. The transmission unit includes a control member, a motor and a shaft connected to the motor. The control member controls operation of the motor. The scrolling unit includes a case in which a passive part, a first prat and a second part are accommodated. The passive part includes a bevel gear and a spur gear which is co-rotated with the bevel gear. The shaft extends into the case and is connected to a driving gear which is engaged with the bevel gear. The first part includes at least one first gear, a first spool and a first rope. The at least one first gear is engaged with the spur gear. The first rope is wrapped to the first spool. An end of the first rope passes through a first transition member and the curtain, and is fixed to the first end of the top rail. The second part includes at least one second gear, a second spool and a second rope. The at least one second gear is engaged with the at least one first gear. The second rope is wrapped to the second spool. An end of the second rope passes through a second transition member and the curtain, and is fixed to the second end of the top rail.
The first transition member and the second transition member are respectively located to two ends of the bottom rail. The first transition member and the second transition member have identical structure and located symmetrically to each other. Each of the first transition member and the second transition member includes a first rod and a second rod, wherein the first rod is perpendicular to the bottom rail, and the second rod is parallel to the bottom rail. The first/second rope are wrapped to the first rod and turn 90 degrees to be wrapped to the second rod. The first/second rope then passes through the curtain and is fixed to the top rail.
Preferably, the transmission unit includes a power supply which is electrically connected to the motor.
Preferably, the power supply includes a box and a rechargeable battery is received in the box.
Preferably, the control member of the transmission unit is controlled by a wireless remote controller so as to activate the motor.
Preferably, the bottom rail includes a bottom pate and a housing. The bottom plate is connected to the housing to form a room between the housing and the bottom plate. The transmission unit, the scrolling unit, the first transition member, the second transition member are located in the room between of the housing and the bottom plate.
The advantages of the present invention are that the transmission unit, the scrolling unit, the first transition member and the second transition member are located in the bottom rail so that the weight of the top rail is reduced. The transmission unit and the scrolling unit are easily maintained.
The electric window curtain can be operated by the battery even when an electric power outage happens.
The transmission unit is located in the bottom rail, so that the replacement of the battery is easy and convenient.
The scrolling unit is transversely installed so that the ropes are not likely entangled with each other.
The present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, a preferred embodiment in accordance with the present invention.
Referring to
The top rail 1 includes a U-shaped cross section and connected to the top edge of a window. The transmission unit 4, the scrolling unit 5, the first transition member 6 and the second transition member 7 are received in the bottom rail 2 so that the top rail 1 is easily installed. The transmission unit 4 and the scrolling unit 5 lift or lower the curtain 3.
As shown in
The curtain 3 can be a comb-shaped curtain in this embodiment, other types of curtains can also be used, such as blinds or Roman shade.
As shown in
As shown in
The first part 53 including at least one first gear 531, a first spool 532 and a first rope 533. The at least one first gear 531 is engaged with the spur gear 522. One of two ends of the first rope 533 is wrapped to the first spool 532, the other one of the two ends of the first rope 522 passes through the first transition member 6 and the curtain 3, and is fixed to the first end of the top rail 1.
The second part 54 includes at least one second gear 541, a second spool 542 and a second rope 543. The at least one second gear 541 is engaged with the at least one first gear 531. One of two ends of the second rope 543 is wrapped to the second spool 542, and the other one of the two ends of the second rope 542 passes through the second transition member 7 and the curtain 3, and is fixed to the second end of the top rail 1.
As shown in
The top rail 1 is light and easily to be installed because the transmission unit 4, the scrolling unit 5, the first transition member 6 and the second transition member 7 are located in the bottom rail 2. In addition, the transmission unit 4 and the scrolling unit 5 are easily maintained in the bottom rail 2.
The curtain 3 can also be operated by the power from the rechargeable battery 441 when an electric power outage happens.
The control member 41 of the transmission unit 4 is controlled by a wireless remote controller (not shown) so as to activate the motor 42.
When in use, the shaft 43 drives the passive gear 52 of the scrolling unit 5, and the first part 53 and the second part 54 are co-rotated to scroll or release the first and second ropes 533, 543 to lift or lower the curtain 3. Besides, the scrolling unit 5 is transversely installed so that the first and second ropes 533, 543 are not likely entangled with other.
While we have shown and described the embodiment in accordance with the present invention, it should be clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.
Number | Date | Country | Kind |
---|---|---|---|
109211528 | Sep 2020 | TW | national |
110202422 | Mar 2021 | TW | national |