Patent Publication Number: US-9840870-B2

Title: Reel pipe motor and a rolling curtain positioning control system

Description:
BACKGROUND OF THE INVENTION 
     Field of Invention 
     The present invention relates to the technical field of rolling curtain control, in particular, to a reel pipe motor and a rolling curtain positioning control system. 
     Related Art 
     The rolling curtain is usually manually driven or electrically driven in use. It is an important issue to precisely wind up a rolling curtain by electric drive in the normal use of an electric rolling curtain. In the conventional art, the upward and downward positioning of the rolling curtain is generally controlled by calculating the number of turns of the roller so that the electric rolling curtain can be precisely wound onto the reel pipe. The rolling curtain will move up or down for a fixed distance for each turn of the roller. The overall distance of upward or downward movement of the rolling curtain is equivalent to the number of turns of the roller multiplied by the upward or downward distance of the rolling curtain brought by each turn of the roller. 
     However, as the rolling curtain is usually flexible, under impacts of circumstantial factors, the number of turns of the flexible rolling curtain of a certain length wound on the roller would vary in such a manner that the rolling curtain is inaccurately positioned, which affects the use and appearance of the rolling curtain. 
     Moreover, the conventional electrically driven rolling curtain is generally driven by an electric reel pipe motor. Conventional reel pipe motors have to he turned on or off by turning on or off the general power supply, which makes for inconvenient use. 
     Furthermore, the conventional electric rolling curtain usually has to be powered on by an external power supply, meaning the rolling curtain could not normally be rolled down if the power is cut off. 
     SUMMARY OF THE INVENTION 
     In order to address the aforesaid defects, the present invention provides a reel pipe motor, the power supply of which could be conveniently turned on or off. 
     It is therefore an object of the present invention to provide a reel pipe motor, comprising a casing; a motor and a speed reduction assembly disposed within the casing; art L-shape motor end head having a tubular part and a box part which could be connected with the casing; a switch box disposed on the outer surface of the box part, in which a switch control panel and a bead switch are located; and a power supply plug and a hollow rod. The bead switch is connected with the hollow rod. The bead switch could be operated by pulling the hollow rod. A first end of the power supply plug is electrically connected with the switch control panel, and a second end thereof extends into the hollow rod and is electrically connected with an external power supply. 
     Moreover, a charge control circuit board as well as an external power line and a charging battery connected with the charge control circuit board are further provided within the casing. The external power line is electrically connected with the switch control panel after passing through the tubular part and the box part. The charge control circuit board is electrically connected with the motor. When the external power supply is turned on, the charging battery is charged by the external power supply when it drives the motor into operation, and when the external power supply is turned off, the motor is driven into operation by the rechargable battery. 
     Moreover, a power supply socket is further provided at the end of the hollow rod for inserting the external power supply. 
     Furthermore, a crown wheel and a clamp preventing the crown wheel from falling off the outer surface of the tubular part are covered on the outer surface of the tubular part. 
     In addition, the reel pipe motor further comprises a rotation wheel which is connected with the speed reduction assembly. 
     Further, the bead switch includes a main body electrically connected with the switch control panel and a bead chain extending into the main body. The hollow rod includes a conic contact and a hollow cylindrical tube connected with the conic contact. The bead chain extends into and is limited within the conic contact. 
     Moreover, a first via hole having a diameter smaller than that of the bead of the bead chain is formed on the top surface of the conic contact. A second via hole having a diameter larger than that of the bead of the bead chain is formed on the first side of the conic contact. The first via hole is in communication with the second via hole by a connecting seam. 
     Furthermore, a third via hole is formed on the second side of the conic contact, and a second end of the power supply plug extends into the hollow cylindrical tube through the third via hole. 
     In addition, the speed reduction assembly includes a worm connected with an output shaft of the motor and a plurality of cone pulleys and conic wheels engaged with each other. The rotation speed of the motor is transmitted to through the worm and reduced by the plurality of on pulleys, and then transmitted to the conic wheels. 
     Moreover, the plurality of cone pulleys includes first, second, third, fourth, and fifth cone pulleys, in which the year ratio of the worm to the first cone pulley is 15-20, the gear ratio of the first cone pulley to the second cone pulley is 2-5, the gear ratio of the second cone pulley to the third cone pulley is 10/(3-4), the gear ratio of the third cone pulley to the fourth cone pulley 350 is 2.5-3, the fourth cone pulley drives the filth cone pulley, the fifth cone pulley drives the conic wheel, and the gear ratio of the fifth cone pulley to the conic wheel is 800/(3-5). 
     Further, the first cone pulley is configured by a helical gear and a spur gear, the fifth cone pulley is configured by a bevel gear and a spur gear, and all the second, third and fourth cone pulleys are configured by two spur gears. 
     Moreover, a sensor is further provided at the switch control panel and when the sensor senses a target to be sensed, the circuit control panel turns on or off the power supply. 
     Furthermore, a level rod is further provided on the side of the box part. 
     The present invention further discloses a rolling curtain positioning control system, comprising the aforesaid reel pipe motor and curtain cloth. A starting end sensing element and a terminating end sensing element are respectively provided on two ends of the curtain cloth. When the curtain cloth is wound up, the reel pipe motor is stopped after the switch control panel senses the terminating end sensing element, and when the curtain cloth is wound down, the reel pipe motor is stopped after the switch control panel senses the starting end sensing element. 
     Furthermore, the starting end sensing element and the terminating end sensing element are both magnets, and a tongue tube is provided on the switch control panel. 
     The present invention has the following advantages over the prior art. 
     First, the external and internal power lines both hide within the casing, which provides an aesthetic appearance of the motor as a whole. 
     Second, the operation of the motor is controlled by the bead switch, which provides more convenient use. And the hollow rod could prevent the bead chain or rope winding onto the neck of children in use, preventing the potential risks. 
     Third, a charging battery is provided within the motor, in the normal power supply mode, the external power supply could be used to provide power to the motor and in the meantime charge the charging battery. And when the external power supply is cut off, power is provided by the charging battery to the motor. 
     Fourth, the starting end sensing element and the terminating end sensing element located on both ends of the curtain cloth, as well as the sense control configuration, guarantee the curtain cloth would not be affected by the winding looseness or tightness of the curtain cloth on the reel pipe while being wound down or up, which therefore provides a higher moving precision. 
     Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The present invention will become more fully understood from the detailed description given herein below for illustration only, and thus are not limitative of the present invention, and wherein: 
         FIG. 1  is a stereogram of the reel pipe motor according to a preferred embodiment of the invention; 
         FIG. 2  is an exploded view of the reel pipe motor according to a preferred embodiment of the invention; 
         FIG. 3  is an exploded view of the motor end head according to a preferred embodiment of the invention; 
         FIG. 4  is a stereogram of the conic contact according to a preferred embodiment of the invention; 
         FIG. 5  is another stereogram of the conic contact according to a preferred embodiment of the invention; 
         FIG. 6  is an exploded view of the speed reduction assembly according to a preferred embodiment of the invention; and 
         FIG. 7  is a stereogram of the rolling curtain positioning control system according to a preferred embodiment of the invention. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
     Embodiments of the present invention will be described in detail below with reference to the drawings. However, the present invention shall not be limited to these embodiments. 
     With reference to  FIGS. 1 and 2 , the reel pipe motor of the invention comprises a casing  100 ; a motor  200  and a speed reduction assembly  300  disposed within the casing  100 ; an L-shape motor end head  400  having a tubular part  410  and a box part  420  which could be connected with the casing; a switch box  500  disposed on the outer surface of the box part, in which a switch control panel  510  and a bead switch  520  are located; a power supply plug  600  and a hollow rod  700 . The bead switch  520  is connected with the hollow rod  700 . The bead switch  520  could be operated by pulling the hollow rod  700 . The first end of the power supply plug  600  is electrically connected with the switch control panel  510  and the second end thereof extends into the hollow rod  700  and is electrically connected with an external power supply. 
     The movement of the motor could be controlled by pulling the bead switch  520 , so that the activation and disenablement of the reel pipe motor could be more simply controlled and more smoothly operated. 
     One end of the power supply plug  600  for connecting to the external power supply is inserted onto the switch control panel, and the wire connected with the other end thereof extends into the hollow rod and is then electrically connected with the external power supply. The external power line  10  electrically connected to the motor passes through the tubular part and box part of the motor end head and then is electrically connected with the switch control panel. A via hole  421  is located on the box part for passing the external power line  10 . As the wire of the power supply plug  600  and the external power line  10  electrically connected to the motor respectively hide within the hollow rod and the motor end head, the reel pipe motor has a more aesthetic overall appearance. 
     Referring to  FIGS. 4-5 , in a preferred embodiment, the bead switch  520  is composed of a main body  512  electrically connected with the switch control panel and a bead chain  522 . The hollow rod  700  is composed of a conic contact  710  and a hollow cylindrical tube  720  connected with the conic contact  710 . A power supply socket  730  is inserted at the bottom of the hollow cylindrical tube  720  for inserting the external power supply. 
     A first via hole  711  having a diameter smaller than that of the bead of the bead chain, is formed on the top surface of the conic contact  710 . A second via hole  717  having a diameter larger than that of the bead of the head chain is formed on the first side of the conic contact. The first via hole is in communication with the second via hole by the connecting seam  713 . The bead at the end of the bead chain extends into the second via hole  712  and then moves to the lower end of the first via hole  711  along the connecting seam  713 , thereby limiting the bead chain at the lower end of the first via hole  711 . 
     A third via hole  714  is formed on the second side of the conic contact  710 . The third via hole is substantially of a water-drop shape. The wire of the power supply plug extends into the hollow cylindrical tube through the third via hole  714 . 
     Referring to  FIG. 2 , in this embodiment, not only the motor  200  and the speed reduction assembly  300  are located within the casing  100 , but also the charging battery  20  and the charge control circuit board  30  are provided. The external power line  10 , the charging battery  20  and the motor  200  are all electrically connected with the charge control circuit board  30 . When the external power supply is transferred to the charge control circuit board  30  through the external power line  10 , the charge control circuit board  30  transfers the external power supply to the charging battery and the motor respectively. When no external power supply is detected by the charge control circuit board, current is provided by the charging battery  20  to the motor  200 . 
     A crown wheel  411  and a clamp  412  preventing the crown wheel  411  from falling off the outer surface of the tubular part are covered on the outer surface of the tubular part  410  of the motor end head. 
     A rotation wheel  40  is provided on the other end of the casing. The rotation wheel  40  is connected with the output end of the speed reduction assembly. 
     As shown in  FIG. 6 , the speed reduction assembly  300  according to this embodiment comprises a worm  310  connected with the output shaft of the motor, a plurality of cone pulleys and conic wheels engaged with each other. The rotation speed of the motor is transmitted to through the worm and reduced by the plurality of cone pulleys, and then transmitted to the conic wheels. 
     In this embodiment, the first, second, third, fourth and fifth cone pulleys are provided, in which the gear ratio of the worm to the first cone pulley  320  is 15-20, the gear ratio of the first cone pulley  320  to the second cone pulley  330  is 2-5, the gear ratio of the second cone pulley  330  to the third cone pulley  340  is 10/(3-4), the gear ratio of the third cone pulley  340  to the fourth cone pulley  350  is 2.5-3, the fourth cone pulley  350  drives the fifth cone pulley  360 , the fifth cone pulley  360  drives the conic wheel  370 , and the gear ratio of the fifth cone pulley  360  to the conic wheel  370  is 800/(3-5). 
     The cone pulley configuration makes full use of the space of the reel pipe, which effectively shortens the length and reduces the volume. 
     The first cone pulley  320  is configured by a helical gear and a spur gear. The fifth cone pulley  360  is configured by a bevel gear and a spur gear. All the second, third and fourth cone pulleys are configured by two spur gears. The first and fifth cone pulleys are configured to cooperate with the worm and the conic wheel. 
     The speed reduction assembly further comprises a speed reduction gearbox upper casing  311 , a speed reduction gearbox lower casing  312 , a speed reduction gearbox cap  313  and a bearing  314 . The speed reduction gearbox upper casing  311 , the speed reduction gearbox lower casing  312 , the speed reduction gearbox cap  313  and the bearing  314  are formed to receive the speed reduction configuration including the cone pulleys, wheels and worm. 
     Referring to  FIG. 7 , the present invention further discloses a rolling curtain positioning system comprising the aforesaid reel pipe motor and curtain cloth  1000 . The curtain cloth  1000  could be wound onto the reel pipe under the action of the reel pipe motor. 
     A starting end sensing element  1001  and a terminating end sensing element  1002  are respectively provided on two ends of the curtain cloth. A sensor not shown is disposed at the switch control panel within the switch box. When the curtain cloth is wound up, the reel pipe motor is stopped after the sensor senses the terminating end sensing element  1002 . When the curtain cloth is wound down, the reel pipe motor is stopped after the sensor senses the starting end sensing element  1001 . 
     When the curtain cloth is wound up, after the reel pipe motor is stopped following the sensor sensing the terminating end sensing element  1002 , the reel pipe motor will not run even if the instruction to wind up the curtain cloth is executed again. By the same token, when the curtain cloth is wound down, after the reel pipe motor is stopped following the sensor sensing the starting end sensing element  1001 , the reel pipe motor will not run even if the instruction to wind down the curtain cloth is executed again. 
     The sensor and sensing elements in this invention could employ infrared sensors or Holzer magnetic induction. In a preferred embodiment, the starting end sensing element  1001  and the terminating end sensing element  1002  are both magnets, and the sensor could include a tongue tube and the tongue tube could detect magnets and cut off circuit connection. 
     In order to reduce shake of the curtain cloth while being wound up and down, a level rod  422  is further provided on the side of the box part. 
     The specific embodiments described herein are merely illustrative of the spirit of the invention. It is apparent to those skilled in the art that various modifications, amendments and alternatives can be made to these embodiments without departing from the spirit or scope defined by the appended claims.