Lift coard concealable venetian blind

#1. Field of the Invention

#The present invention relates to Venetian blinds and, more specifically, to a lift cord concealable Venetian blind that keeps the lift cords from sight and from reach of children.

#2. Description of the Related Art

#FIG. 1 is a schematic drawing of a first embodiment of the present invention, showing the lift cord concealable Venetian blind extended out.

#FIG. 2 is a schematic drawing showing the locking position of the lift cord for the lift cord concealable Venetian blind according to the first embodiment of the present invention.

#FIG. 3 is a schematic drawing corresponding to FIG. 3, showing the lift lock unlocked.

#Referring to FIG. 1, a lift cord concealable Venetian blind 10 is shown comprising a headrail 12 fixedly transversely fastened to the top side of the window, the headrail 12 having a first end 13 (the right end), a bottom rail 14 extended in transverse direction and spaced below the headrail 12, a number of slats 16 arranged in parallel between the headrail 12 and the bottom rail 14, a lift lock 20 installed in the first end 13 of the headrail 12, the lift lock 20, as shown in FIGS. 2 and 3, comprised of a transverse guide rod 22 and an eccentric ratchet wheel 24; a retractable tube 30 suspended from the first end 13 of the headrail 12 at one side, and two lift cords 40.

#The retractable tube 30 is comprised of a first tube body 32, a second tube body 34, and a third tube body (last tube body) 36. The tube bodies 32;34;36 slide one inside another. The first tube body 32 has one end, namely, the top end pivoted to (or hung on) the bottom side of the first end 13 of the headrail 12 for swinging within a limited angle. The second tube body 34 has an outer diameter slightly smaller than the inner diameter of the first tube body 32, and is axially slidably inserted into the first tube body 32. The second tube body 34 can be moved axially relative to the first tube body 32 between the extended position where the second tube body 34 is extended out of the first tube body 32 (with the top end of the second tube body 34 maintained inside the first tube body 32), and the received position where the second tube body 34 is received in the first tube body 32 (with the bottom end of the second tube body 34 disposed outside the first tube body 32). The third tube body 36 has an outer diameter slightly smaller than the inner diameter of the second tube body 34, and is axially slidably inserted into the second tube body 34.The third tube body 36 can be moved axially relative to the second tube body 34 between the extended position where the third tube body 36 is extended out of the second tube body 34 (with the top end of the third tube body 36 maintained inside the second tube body 34), and the received position where the third tube body 36 is received in the second tube body 34 (with the bottom end of the third tube body 36 disposed outside the second tube body 34). The bottom end of the third tube body 36 is provided with a handgrip 38 disposed outside the second tube body 34 for the holding of the hand. As illustrated in FIG. 5, the tube bodies 32;34;36 each have a respective retaining hole 33;35;37 transversely disposed near the respective top end. The first tube body 32 is peripherally fixedly mounted with a retaining spring plate 39. The retaining spring plate 39 has a protruded retaining portion 391 formed in the free end thereof and engaged into retaining hole 33. When the retractable tube 30 received, the protruded retaining portion 391 engage the retaining holes 33;35;37 of the tube bodies 32;34;36, holding the tube bodies 32;34;36 one inside another, i.e., holding the retractable tube 30 in the received condition. When the user pulls the handgrip 38 downwards, the protruded retaining portion 391 is forced outwards to disengage the tube bodies 32;34;36, for enabling the retractable tube 30 to be extended out.

#The lift cords 40 have a respective first end symmetrically fixedly fastened to the bottom rail 14, and a respective top end upwardly inserted through a respective through hole (not shown) in each slat 16 and then inserted into the inside of the headrail 12 and then extended in the same direction toward the first end 13 of the headrail 12 and then extended over the transverse guide rod 22 of the lift lock 20 and then turned downwards through the gap between the transverse guide rod 22 and the eccentric ratchet wheel 24 into the inside of the tube bodies 32;34;36 of the retractable tube 30 and at final fixedly fastened to the inside of the third tube body 36 near the handgrip 38 (alternatively, one single lift cord may be used and inserted through a first through hole in each slat and the bottom rail and then inserted through a second through hole in the bottom rail and each slat and then extended through the headrail and the retractable tube and then fixedly fastened with the ends to the handgrip of the third tube body of the retractable tube; subject to the size of the Venetian blind, three lift cords may be used).