Abstract: The present invention discloses a blind slat positioning device and a window blind thereof. The positioning device can fix the slat at any height at which the slat is pulled down. The positioning device includes a turning seat which is provided at least with an overbend element for a pull cord to wrap around. The overbend element includes at least a ridge, resulting an effect that the slat stops at the height at which the slat is pulled down, with the aid of gravity.

Abstract: A connector controller controls a connector with a power pin, a communication pin, and a ground pin. The connector detects the voltage at the communication pin at least twice to generate first and second voltages respectively. A bus power is supplied at the power pin. The first voltage is detected when a bus current to/from the bus power is about zero. The connector controller controls the bus power in response to a difference between the first and second voltage.

Abstract: A leading wire of pull cord of release wheel in a window blind is disclosed. In the beginning that the release wheel reels the pull cord, the winding angle of the pull cord can be defined that the wound reel can be neatly ordered. In a location of winding hub of the release wheel close to an inner spoke side, at least a piercing hole is transfixed along an inscribed tangent. In addition, a winding definer is further disposed in the direction at which the pull cord is spinning out, allowing the direction of an initial reeling coil to be defined in advance, so that the reel can be wound orderly.

Abstract: A power supply has multiple DC power sources converted from an AC power source. The power supply has an isolated converter converting the AC power source into an intermediate DC power source, and non-isolated converters converting the intermediate DC power source into the DC power sources, regulated at target output values respectively. A communication channel connects the isolated converter and one of the non-isolated converters, and transmits a feedback signal in association with the target output values. The isolated converter, in response to the feedback signal, regulates the intermediate DC power source at an intermediate target value related to the target output values.

Abstract: A curtain hanging assembly that consists of a curtain assembly able to effect horizontal opening and closing of curtains, and includes two elastic motor units provided with elastic feedback. Interactive dynamics between the two elastic motor units, through linear linkage, respectively cause torque forces produced to be in mutual opposition, enabling the let down area of the curtains to be naturally fixed at any height position.

Abstract: A power supply is configured to limit its output power, converting an input voltage on a primary side into a bus voltage on a secondary side. A current-sense resistor detects a bus current output from the power supply to provide a current-sense signal. A bus switch is electrically connected to a secondary winding on the secondary side, configured to selectively supply power to the bus voltage. A power delivery controller controls the bus switch in response to the current-sense signal and a power detection signal on the secondary side. The power delivery controller provides a power threshold in response to the bus voltage, compares the power detection signal with the power threshold, and turns off the bus switch to stop supplying power to the bus voltage if the power detection signal exceeds the power threshold, thereby limiting the output power of the power supply.

Abstract: A connector controller controls a connector with a power pin, a communication pin, and a ground pin. The connector detects the voltage at the communication pin at least twice to generate first and second voltages respectively. A bus power is supplied at the power pin. The first voltage is detected when a bus current to/from the bus power is about zero. The connector controller controls the bus power in response to a difference between the first and second voltage.

Abstract: An unequal-torque coil spring and a spring motor thereof which is adapted for a curtain set that can automatically fold back a curtain; the same provides a feedback torque that responds to different stages of a curtain-folding working process and generates various corresponding torque in response, as each of the different stages requires a different force. Consequently, the curtain can be folded back at a steady speed, and positionally fixed at any height when the curtain is lowered.

Abstract: A curtain hanging assembly that consists of a curtain assembly able to effect horizontal opening and closing of curtains, and includes two elastic motor units provided with elastic feedback. Interactive dynamics between the two elastic motor units, through linear linkage, respectively cause torque forces produced to be in mutual opposition, enabling the let down area of the curtains to be naturally fixed at any height position.

Abstract: A power supply is configured to limit its output power, converting an input voltage on a primary side into a bus voltage on a secondary side. A current-sense resistor detects a bus current output from the power supply to provide a current-sense signal. A bus switch is electrically connected to a secondary winding on the secondary side, configured to selectively supply power to the bus voltage. A power delivery controller controls the bus switch in response to the current-sense signal and a power detection signal on the secondary side. The power delivery controller provides a power threshold in response to the bus voltage, compares the power detection signal with the power threshold, and turns off the bus switch to stop supplying power to the bus voltage if the power detection signal exceeds the power threshold, thereby limiting the output power of the power supply.

Abstract: An unequal-torque coil spring and a spring motor thereof which is adapted for a curtain set that can automatically fold back a curtain; the same provides a feedback torque that responds to different stages of a curtain-folding working process and generates various corresponding torque in response, as each of the different stages requires a different force. Consequently, the curtain can be folded back at a steady speed, and positionally fixed at any height when the curtain is lowered.

Abstract: An unequal-torque coil spring and a spring motor thereof which is adapted for a curtain set that can automatically fold back a curtain; the same provides a feedback torque that responds to different stages of a curtain-folding working process and generates various corresponding torque in response, as each of the different stages requires a different force. Consequently, the curtain can be folded back at a steady speed, and positionally fixed at any height when the curtain is lowered.

Abstract: The present invention discloses a manufacturing method of an unequal-torque coil spring and a manufacturing machine thereof for a curtain spring motor, providing a feedback torque that corresponds to an actual requirement from different stages in a curtain-folding working process, so that when the curtain is folded back, the torque can be used to stabilize the speed of folding back the curtain, and the lower beam of the curtain can be fixed at any heights as the curtain is lowered.

Abstract: An unequal-torque coil spring and a spring motor thereof which is adapted for a curtain set that can automatically fold back a curtain; the same provides a feedback torque that responds to different stages of a curtain-folding working process and generates various corresponding torque in response, as each of the different stages requires a different force. Consequently, the curtain can be folded back at a steady speed, and positionally fixed at any height when the curtain is lowered.

Abstract: An unequal-torque coil spring and a spring motor thereof which is adapted for a curtain set that can automatically fold back a curtain; the same provides a feedback torque that responds to different stages of a curtain-folding working process and generates various corresponding torque in response, as each of the different stages requires a different force. Consequently, the curtain can be folded back at a steady speed, and positionally fixed at any height when the curtain is lowered.

Abstract: An unequal-torque coil spring and a spring motor thereof which is adapted for a curtain set that can automatically fold back a curtain; the same provides a feedback torque that responds to different stages of a curtain-folding working process and generates various corresponding torque in response, as each of the different stages requires a different force. Consequently, the curtain can be folded back at a steady speed, and positionally fixed at any height when the curtain is lowered.

Abstract: A curtain blinds spring motor elasticity maintaining structure, which provides a spring motor structure that prevents unproductive deformation and loss of elastic stress in a sheet band of a coil spring. The structure primarily consists of a kidney shaped wheel face provided on the outer circumferential surface of a drive drum. A first wound layer, a second wound layer, and a third wound layer of the sheet band are pulled and wound onto the drive drum to form a pressure accumulating coil, thereby arranging an anticipated configuration of curved tight windings of each of the wound layers along the kidney shaped wheel face, which prevents changes in the cross-sectional curvature of the sheet band and loss in elastic stress thereof, and thus maintaining an appropriate elastic force.

Abstract: An unequal-torque coil spring and a spring motor thereof which is adapted for a curtain set that can automatically fold back a curtain; the same provides a feedback torque that responds to different stages of a curtain-folding working process and generates various corresponding torque in response, as each of the different stages requires a different force. Consequently, the curtain can be folded back at a steady speed, and positionally fixed at any height when the curtain is lowered.

Abstract: A curtain blinds spring motor elasticity maintaining structure, which provides a spring motor structure that prevents unproductive deformation and loss of elastic stress in a sheet band of a coil spring. The structure primarily consists of a kidney shaped wheel face provided on the outer circumferential surface of a drive drum. A first wound layer, a second wound layer, and a third wound layer of the sheet band are pulled and wound onto the drive drum to form a pressure accumulating coil, thereby arranging an anticipated configuration of curved tight windings of each of the wound layers along the kidney shaped wheel face, which prevents changes in the cross-sectional curvature of the sheet band and loss in elastic stress thereof, and thus maintaining an appropriate elastic force.

Abstract: A guided cutting retainer for an elongated stack set is provided. During a cutting process of an end length of the stack set, the guide cutting retainer keeps end sides of layers of the stack neat and aligned. The guide cutting retainer includes a capped sleeve having a cross-section of a frame and formed with an internal longitudinal through opening. One end of the opening is combined to a U-shaped pedestal. A cut groove is reserved between the U-shaped pedestal and the opening. The U-shaped pedestal can be wedged and fastened with a pressing and positioning frame to provide a wedging effect. Thus, the pressing and positioning frame secures the stack set to fix its end side to form a complete blade-feeding guide groove for guiding the cutting process. The cutting process yields an aligned result further with intervention of a ruler board of an end sealing ruler.