Blind lifting control method and mechanism

Description

BACKGROUND OF THE INVENTION

1. Field of the Invention

[0001] The present invention relates to blinds, and more specifically to a blind lifting control mechanism and a method of the same.

2. Description of the Related Art

[0002] A variety of blinds including Venetian blinds, roller blinds, pleated blinds, honeycomb shades, Roman blinds, vertical blinds, curtains, and so on are commercially available for use in a window to regulate the light, air, etc. A regular blind generally includes a headrail fastened to a top side of the window, and a blind body (formed of a shade or a set of slats, and a bottom rail) mounted at a bottom side of the headrail. The blind body is driven by an external driving force to change its window shading status.

[0003] A Venetian blind or a roller blind is disclosed in DE 23 59 471 comprising a box, lamellae, a coiling shaft with a coiling cylinder, driving means with a driving shaft. US 6,308,764 pertains to a Venetian blind modulating mechanism, which comprises a housing, a worm gear pivoted in the housing, and a worm shaft engaged at one end with the worm gear such that other end of the worm shaft is jutted out of the housing. The worm shaft is formed of a link member and an action member connected end to end with the link member. The link member is engaged at one end with the worm gear and is connected at other end with one end of the action member. The other end of the action member is jutted out of the housing to be connected with an adjustment rod of the Venetian blind.

[0004] The blind lifting control mechanism of a conventional blind generally includes at least one bobbin, regularly two bobbins rotatably mounted with the headrail of the blind and adapted to roll up or let off lift cords of the blind and to further lift or lower the blind body (in an alternate prior art design, a roller is used instead of the bobbin, and the top side of the blind body is directly fastened to the periphery of the roller), a transmission mechanism mounted inside the headrail of the blind and coupled to the bobbins, and an endless operating cord member suspended from the headrail of the blind at an end for pulling by hand to drive the transmission mechanism to rotate the bobbins (or the roller). There is another conventional design in which each of the two lift cords has a first end fastened to the bottom side of the blind body (for example, the bottom rail of the blind body), and a second end inserted inside the headrail of the blind and through a lift lock in the headrail and then downwardly extended out of the bottom side of the headrail to a distance. The user can pull the lift cords to lift or lower the blind body. When the lift cords are released, the lift lock automatically locks the lift cords.

[0005] In the aforesaid prior art designs, the operating cord member or lift cords are suspended outside the headrail. Because a child can easily reach the suspended part of the lift cords or operating cord member, an accident may occur when a child pulls the lift cords or operates the cord member for fun.

SUMMARY OF THE INVENTION

[0006] It is primary objective of the present invention to provide a blind lifting control mechanism, which keeps cord members of the blind in a hidden status, eliminating the possibility of a person, especially a child, hanged on cord members of the blind accidentally.

[0007] To achieve the foregoing objective of the present invention, the blind lifting control mechanism is installed in a blind that includes a headrail mounted at a top side of a window and a blind body mounted under said headrail, said blind lifting control mechanism comprising:at least one bobbin rotatably fastened to said headrail of said blind for synchronous rotation to lift or lower the blind body of said blind; a transmission mechanism mounted inside said headrail of said blind and adapted to rotate said bobbin, said transmission mechanism having a rotating force input end disposed in an end of the headrail; a rotating force output end connected to said bobbin ; and a control rod vertically suspended at a lateral side of the window and pivoted to the force input end of said transmission mechanism and adapted to rotate the force input end of said transmission mechanism by the user and to further drive said transmission mechanism to rotate said bobbin; wherein said force input end of said transmission mechanism is a movable device, said movable device having a cylindrical gear horizontally suspended inside said headrail of said blind, a rod member coaxially connected to said cylindrical gear and downwardly extended out of said headrail of said blind and pivoted to a top end of said control rod, a toothed endless groove fixedly located on a part inside the headrail of said blind, a spring member connected between a part of the headrail and a part of said cylindrical gear to support said movable device in the locking position, and gear set meshed with said cylindrical gear and located between said force input end and said force output end; characterized in that means are provided for stopping reverse transmission of force from said force output end toward said force input end; and a toothed collar is fixedly provided around the periphery of said rod member and vertically movable with said rod member between a locking position where said toothed collar engages said toothed endless groove to stop said rod member from rotation, and an unlocking position where said toothed collar is disengaged from said toothed endless groove for enabling said rod member to be rotated by said control rod. A blind lifting control method of controlling the rotation of bobbins in a headrail of a blind is provided to roll up or let off lift cords of said blind to further lift or lower the blind body of said blind by rotating a control rod to further drive a transmission mechanism in said headrail of said blind to rotate said bobbins and enabling said transmission mechanism to prohibit transmission of a rotary driving force in direction from said bobbin toward said control rod after stoppage of the rotation of said control rod is stopped; characterized in that reverse transmission of force from a force output end toward a force input end is stopped; and a toothed collar is fixedly provided around the periphery of said rod member and vertically movable with said rod member between a locking position where said toothed collar engages said toothed endless groove to stop said rod member from rotation, and an unlocking position where said toothed collar is disengaged from said toothed endless groove for enabling said rod member to be rotated by said control rod.

BRIEF DESCRIPTION OF THE DRAWINGS

[0008] 

FIG. 1 is an elevation view showing a blind lifting control mechanism installed in a Venetian blind according to the state of the art.

FIG. 2 is an enlarged view of a part of FIG. 1, showing the arrangement of a transmission mechanism in a headrail of the blind.

FIG. 3 is a sectional view in an enlarged scale taken along a line 3-3 indicated in FIG. 2.

FIG. 4 is a schematic sectional view showing a control rod moved relative to the headrail of the blind.

FIG. 5 is a perspective view showing that the crank handle is at an operative position.

FIG. 6 is a perspective view showing that the crank handle is at a non-operative position.

FIG. 7 is an exploded view of a blind lifting control mechanism installed in a Venetian blind.

FIG. 8 is an exploded view of a blind lifting control mechanism installed in a Venetian blind.

FIG. 9 is a sectional view of a part of a preferred embodiment of the present invention, showing a movable device is at a locking position.

FIG. 10 is a sectional view taken along a line 10-10 indicated in FIG. 9.

FIG. 11 is similar to FIG. 9 but showing the movable device moved to a unlocking position.

DETAILED DESCRIPTION OF THE INVENTION

[0009] Referring to FIGS. 1-3, a blind lifting control mechanism 20 in accordance with the state of the art is shown installed in a Venetian blind 10 for lifting control. The Venetian blind 10 includes a headrail 11, which is a hollow bar fixedly fastened to a topside of a window, a blind body 12, which is composed of a number of transversely extended parallel slats 13 and a bottom rail 14 suspended below the slats 13, two lift cords 15 bilaterally and vertically inserted through the slats 13, each lift cord 15 having a bottom end fixedly connected to the bottom rail 14 and a top end inserted into the inside of the headrail 11 (this will be described further), and a tilt control mechanism 16 adapted to regulate the tilting angle of the slats 13. The tilt control mechanism 16 includes a tilt rod 17 vertically suspended from the headrail 11 at a left side thereof and adapted to rotate a tilt rod via a worm gear and tilter mechanism, causing the tilt rod to move two ladder tapes and to further change the tilting angle of the slats 13. Because the tilt control mechanism 16 is a conventional design, no further detailed description is necessary.

[0010] The blind lifting control mechanism 20 includes two bobbins 25 symmetrically mounted on an axle 27 inside the headrail 11 for synchronous rotation with the axle 27 to roll up or let off the lift cords 15, a transmission mechanism 30 mounted inside the headrail 11 near a right side thereof, and a control rod 40.

[0011] The transmission mechanism 30 includes a worm 31, which includes a worm body 32 vertically suspended inside the headrail 11 and a round rod 33 axially extended from the bottom end of the worm body 32 and partially extended out of the bottom side of the headrail 11, a worm gear 34 disposed inside the headrail 11 behind the worm 31 and meshed with the worm body 32, a gear set 35 connected between the worm gear 34 and the axle 27 and adapted to transmit rotary driving force from the worm gear 34 to the axle 27, i.e., the worm gear 34 is the driving force input end of the gear set 35 and the axle 27 is the driving force output end of the gear set 35. The gear set 35 may be variously embodied. For example, the gear set 35 can be a gear train composed of a series of gears of different diameters meshed with one another, or formed of a number of gears coaxially meshed with one another.

[0012] The control rod 40 is vertically suspended from the headrail 11 at a right side thereof, having a top end connected to the round rod 33 of the worm 31 by a universal joint 42. Thus, the control rod 40 can be oscillated toward inside of the room relative to the worm 31 (see FIG. 4). The control rod 40 has a bottom end mounted with a manual rotary driving device, for example, a crank handle 44. The crank handle 44 includes a first arm 45 foldably pivoted to a bottom end of the control rod 40, a second arm 46 foldably pivoted to an end of the first arm 45 remote from the control rod 40, a grip 47 coupled to the second arm 46 for free rotation relative to the second arm 46, and a sleeve 48 fitted to the control rod 40 for free rotation and axial movement relative to the control rod 40. The sleeve 48 is longitudinally longer than the first arm 45. When in use, as shown in FIGS. 1 and 2, the first arm 45 is set in a horizontal position perpendicular to the control rod 40, the second arm 46 is set in a vertical position perpendicular to the first arm 45, and the sleeve 48 connected to a bottom end of the control rod 40 and being stopped against the first arm 45. When not in use, as shown in FIGS. 5 and 6, the first arm 45 and the second arm 46 are pulled downwards and vertically aligned with the control rod 40, and the sleeve 48 is pulled downwards and stopped above the grip 47 around the first arm 45 and the pivoted connecting area between the control rod 40 and the first arm 45 as well as the pivoted connecting area between the first arm 45 and the second arm 46. Therefore, the sleeve 48 locks the control rod 40, the first arm 45, and the second arm 46 in alignment.

[0013] When wishing to adjust the elevation of the blind 12, move the control rod 40 in direction from the window toward the inside of the room and set the crank handle 44 in an operative position as shown in FIG. 4, and then hold the sleeve 48 with one hand and drive the grip 47 with the other hand to rotate the control rod 40 relative to the sleeve 48. Rotating the control rod 40 causes the worm 31 to rotate the worm gear 34, the gear set 35 and the axle 27, thereby causing the bobbins 25 to roll up or let off the lift cords 15 subject to the direction of rotation of the control rod 40. Therefore, the blind 12 is received upwards or extended downwards.

[0014] The aforesaid worm and worm gear mechanism transmits driving force in one direction only (i.e., the worm 31 rotates the worm gear 34 when receiving a rotary driving force, however the worm 31 stops a rotary driving force coming from the worm gear 34), therefore the user can control the control rod 40 to rotate the bobbins 25, and a self-locking mechanism of the aforesaid worm and worm gear mechanism automatically locks the bobbins 25 when the user adjusted the blind 12 to the desired elevation, i.e., the blind 12 is positively positioned at the adjusted elevation.

[0015] As indicated above, the invention does not use any lift cord or like means to achieve blind lifting control, it eliminates the possibility of a person (more particularly a child) hanged on the lift cord accidentally. Therefore, the blind is safe for use and fits blind safety codes in advanced countries.

[0016] The aforesaid blind lifting control mechanism can also be used in another equivalent blind, for example, a pleated blind, honeycomb shade, or roman blind. When it's used in a roller blind, a roller is used instead of the two bobbins and, the top side of the blind body is fastened to the periphery of the roller.

[0017] A crank handle 44 is mounted at the bottom side of the control rod 40 of the lifting control mechanism 20 for enabling the user to rotate the control rod 40 with less effort. However, this crank handle 44 is not requisite. An accelerating mechanism may be installed in the transmission mechanism 30 so that the user can rotate the straight control rod 40 directly without much effort.

[0018] FIG. 7 shows a blind lifting control mechanism wherein, the blind lifting control mechanism 50 includes two bobbins 52 (similar to the bobbins of the aforesaid first embodiment), a transmission mechanism 54(similar to the transmission mechanism of the aforesaid first embodiment), a control rod 56, and a detachable crank handle 60. The control rod 56 has a coupling device at a bottom end thereof, for example, a hexagonal coupling hole 57. The crank handle 60 includes a L-shaped crank arm 61, a driving rod 62 axially forwardly extended from an end of the L-shaped crank arm 61 and terminating in a coupling device, for example, a hexagonal coupling tip 64 that fits the hexagonal coupling hole 57, a sleeve 63 sleeved onto the driving rod 62 for free rotation, and a grip 65 perpendicularly extended from the other end of the L-shaped crank arm 61 in direction reversed to the driving rod 62. When in use, the crank handle 60 is attached to the bottom end of the control rod 56 for enabling the user to rotate the control rod 56 with less effort. After use, the crank handle 60 is removed from the control rod 56. According to this embodiment, a single crank handle 60 can be used to rotate the lifting control mechanisms of multiple blinds in a house.

[0019] FIG. 8 shows a blind lifting control mechanism wherein, an electric rotary driving device 73 is used for rotating the control rod 71. Similar to the aforesaid second embodiment, the control rod 71 has a coupling portion, for example, a hexagonal coupling hole 72 at the bottom end thereof. The electric rotary driving device 73 includes a housing 74, a battery power supply and motor assembly (not shown) mounted inside the housing 74, a driving shaft 76 extended from the output shaft of the reversible motor of the battery power supply and motor assembly out of the housing 74 and terminating in a coupling device, for example, a hexagonal coupling tip 77 that fits the hexagonal coupling hole 72 of the control rod 71, and a switch 75 adapted to control on/off and forward/backward rotation of the reversible motor of the battery power supply and motor assembly. By means of the electric rotary driving device 73, the user can conveniently rotate the control rod 71 without effort.

[0020] FIGS. 9-11 show a blind lifting control mechanism according to the present invention. According to this embodiment, the blind lifting control mechanism 80 includes a transmission mechanism 81, a bobbin 94, two pulleys 95, and a control rod 97. The transmission mechanism 81 includes a movable device 82, a spring member 89, and a gear set 91. The movable device 82 includes a cylindrical gear 83 horizontally suspended inside a right side of the headrail 85, a rod member 84 coaxially connected to the cylindrical gear 83 and extended out of a circular through hole 86 in the bottom side of the headrail 85 and pivoted to the top end of the control rod 97, a toothed groove 88 formed in the headrail 85 around the circular through hole 86 at a top side, and a toothed collar 87 fixedly provided around the periphery of the rod member 84 and moved vertically with the rod member 84 between a locking position where the toothed collar 87 engages the toothed groove 88 to stop the rod member 84 from rotation (see FIGS. 9 and 10), and an unlocking position where the toothed collar 87 is disengaged from the toothed groove 88 for enabling the rod member 84 to be rotated by the control rod 97 (see FIG. 11). The spring member 89 is connected between an inner surface of the top wall of the headrail 85 and the top side of the cylindrical gear 83 to support the movable device 82 in the aforesaid locking position. The gear set 91 includes an input gear 92 horizontally meshed with the cylindrical gear 83, and an output shaft 93 disposed in a vertical position for output of force. The bobbin 94 is fixedly mounted on the output shaft 93. The pulleys 95 are rotatably fastened with the headrail 85 at locations corresponding to the lift cords 96, and adapted to guide the lift cords 96 to the bobbins 94, for enabling the bobbins 94 to roll up or let off the lift cords 96 upon rotary motion of the output shaft 93. When wishing to adjust the elevation of the blind, push the control rod 97 upwards to lift the toothed collar 87 from the locking position shown in FIG. 9 to the unlocking position shown in FIG. 11, and then drive the control rod 97 to rotate the movable device 82 forwards or backwards. When rotating the movable device 82, the gear set 91 is driven to rotate the bobbin 94, thereby causing the bobbin 94 to roll up or let off the lift cords 96. When the blind lifted or lowered to the desired elevation, pull the control rod 97 downwards to move the toothed collar 87 from the unlocking position shown in FIG. 11 to the locking position shown in FIG. 9.

[0021] According to the aforesaid embodiment, the bobbin or bobbins for moving the lift cords of the blind can be designed to position inside the headrail either in a vertical position or a horizontal position. Further, the transmission mechanism for transmitting a rotary driving force from the control rod to the bobbin or bobbins must have a self-locking feature to stop reverse transmission of force from the force output end (the bobbin or bobbins) to the force input end (the control rod). The transmission mechanism has the capability of increasing the speed of revolution.

Claims

1. A blind lifting control mechanism (20) installed in a blind (10) that includes a headrail (11) mounted at a top side of a window and a blind body (12) mounted under said headrail (11), said blind lifting control mechanism (20) comprising:

at least one bobbin (25) rotatably fastened to said headrail (11) of said blind (10) for synchronous rotation to lift or lower the blind body (12) of said blind (10);

a transmission mechanism (30, 54) mounted inside said headrail (11) of said blind (10) and adapted to rotate said bobbin (25), said transmission mechanism (30, 54) having a rotating force input end disposed in an end of the headrail (11);

a rotating force output end connected to said bobbin (25); and

a control rod (40) vertically suspended at a lateral side of the window and pivoted to the force input end of said transmission mechanism (30, 54) and adapted to rotate the force input end of said transmission mechanism (30, 54) by the user and to further drive said transmission mechanism (30, 54) to rotate said bobbin (25); wherein

said force input end of said transmission mechanism (30, 54) is a movable device, said movable device having a cylindrical gear (83) horizontally suspended inside said headrail (11) of said blind (10), a rod member (84) coaxially connected to said cylindrical gear (83) and downwardly extended out of said headrail (11) of said blind (10) and pivoted to a top end of said control rod (40), a toothed endless groove (88) fixedly located on a part inside the headrail (11) of said blind (10), a spring member (89) connected between a part of the headrail (11) and a part of said cylindrical gear (83) to support said movable device in the locking position, and gear set (35) meshed with said cylindrical gear (83) and located between said force input end and said force output end,
characterized in that

means are provided for stopping reverse transmission of force from said force output end toward said force input end; and

a toothed collar (87) is fixedly provided around the periphery of said rod member (84) and vertically movable with said rod member (84) between a locking position where said toothed collar (87) engages said toothed endless groove (88) to stop said rod member (84) from rotation, and an unlocking position where said toothed collar (87) is disengaged from said toothed endless groove (88) for enabling said rod member (84) to be rotated by said control rod (40).

2. The blind lifting control mechanism (20) as defined in claim 1, wherein said transmission mechanism (30, 54) comprises a worm (31) corresponding to said force input end and a worm gear (34) corresponding to said force output end, said worm (31) and said worm gear (34) being engaged with each other.

3. The blind lifting control mechanism (20) as defined in claim 1, wherein said transmission mechanism (30, 54) further comprises a transmission gear set (35) coupled between said force input end and said force output end and adapted to accelerate the speed of a rotary driving force received by said force input end and then to transmit the rotary driving force to said bobbin (25) through said force output end.

4. The blind lifting control mechanism (20) as defined in claim 1, wherein said control rod (40) has a top end connected to the force input end of said transmission mechanism (30, 54) through a universal joint (42).

5. The blind lifting control mechanism (20) as defined in claim 1, wherein said control rod (40) has a bottom end provided with a collapsible crank handle (44), said collapsible crank handle (44) having a first arm (45), said first arm (45) having a first end pivoted to the bottom end of said control rod (40) and a second end, a second arm (46) having a first end pivoted to a second end of said first arm (45) and a second end, a grip (47) coupled to the second end of said second arm (46) for free rotation relative to said second arm (46), and a sleeve (48) sleeved onto said control rod (40) for free rotation and axially movable along said control rod (40) onto said first arm (45) and the first end of said second arm (46) to hold said control rod (40), said first arm (45) and said second arm (46) being aligned with each other.

6. The blind lifting control mechanism (20) as defined in claim 1, wherein said control rod (40) has a coupling portion at a bottom end thereof; the blind lifting control mechanism (20) further comprises a rotary driving device for detachably connected to the coupling portion of said control rod (40) for operation by the user to rotate said control rod (40), said rotary driving device comprising a driving rod (62) for output of a rotary driving force applied by the user, said driving rod (62) having a front coupling portion for engaging the coupling portion of said control rod (40).

7. The blind lifting control mechanism (20) as defined in claim 6, said rotary driving device is manually operated.

8. The blind lifting control mechanism (20) as defined in claim 7, wherein said manually operated rotary driving device comprises a L-shaped crank arm (61), said L-shaped crank arm (61) having a first end terminating in said driving rod (62) and a second end, a sleeve (48) sleeved onto said driving rod (62) for free rotation relative to said driving rod (62) and said L-shaped crank arm (61), and a grip (47) perpendicularly extended from the second end of said L-shaped crank arm (61).

9. The blind lifting control mechanism (20) as defined in claim 6, wherein said rotary driving device is motor driven, said motor-driven rotary driving device having a reversible motor adapted to rotate said driving rod (62), a power supply adapted to provide the necessary working voltage to said reversible motor, and switch means (75) adapted to control the rotation of said reversible motor.

10. A blind lifting control method of controlling the rotation of bobbins (25) in a headrail (11) of a blind (10) to roll up or let off lift cords (96) of said blind (10) to further lift or lower the blind body (12) of said blind (10) by rotating a control rod (40) to further drive a transmission mechanism (30, 54) in said headrail (11) of said blind (10) to rotate said bobbins (25) and enabling said transmission mechanism (30, 54) to prohibit transmission of a rotary driving force in direction from said bobbin (25) toward said control rod (40) after stoppage of the rotation of said control rod (40) is stopped;
characterized in that

reverse transmission of force from a force output end toward a force input end is stopped; and

a toothed collar (87) is fixedly provided around the periphery of said rod member (84) and vertically movable with said rod member (84) between a locking position where said toothed collar (87) engages said toothed endless groove (88) to stop said rod member (84) from rotation, and an unlocking position where said toothed collar (87) is disengaged from said toothed endless groove (88) for enabling said rod member (84) to be rotated by said control rod (40).

11. The blind lifting control method as defined in claim 10 further comprising a crank handle (44) connected at a bottom end of said control rod (40) for rotating said control rod (40).

12. The blind lifting control method as defined in claim 10 further comprising a rotary driving device detachably connected at bottom end of said control rod (40), said rotary driving device being adapted to be driven manually or electrically to rotate said control rod (40).

Ansprüche

1. Blendenhebesteuerungseinrichtung (20) montiert in eine Blende (10), die eine Kopfschiene (11) umfasst, die an einer oberen Seite eines Fensters angebracht ist, und ein Blendenkörper (12), der unter der Kopfschiene (11) angebracht vorliegt, wobei die Blendenhebesteuerungseinrichtung (20) umfasst:

mindestens eine Spule (25), die an der Kopfschiene (11) der Blende (10) drehbar angebracht vorliegt, um den Blendenkörper (12) der Blende (10) durch eine synchrone Drehbewegung zu heben oder zu senken,

eine Übertragungseinrichtung (30, 54), die in der Kopfschiene (11) der Blende (10) angebracht und dazu angepasst ist, die Spule (25) zu drehen, wobei die Übertragungseinrichtung (30, 54) ein drehendes Krafteingangsende aufweist, das in einem Ende der Kopfschiene (11) angeordnet ist,

ein drehendes Kraftausgangsende, das mit der Spule (25) verbunden vorliegt, und

eine Steuerstange (40), die an einer lateralen Seite des Fensters vertikal hängt und an dem Krafteingangsende der Übertragungseinrichtung (30, 54) gelenkig angebracht und dazu angepasst ist, das Krafteingangsende der Übertragungseinrichtung (30, 54) durch den Benutzer drehen zu lassen und weiterhin die Übertragungseinrichtung (30, 54) anzutreiben, um die Spule (25) zu drehen, worin

das Krafteingangsende der Übertragungseinrichtung (30, 54) eine bewegliche Einrichtung darstellt, wobei die bewegliche Einrichtung ein zylindrisches Getriebe (83) aufweist, das in der Kopfschiene (11) der Blende (10) horizontal aufgehängt ist, ein Stabelement (84), das mit dem zylindrischen Getriebe (83) koaxial verbunden ist und sich aus der Kopfschiene (11) der Blende (10) nach unten erstreckt und an einem oberen Ende der Steuerstange (40) gelenkig angebracht vorliegt, eine gezahnte Endlos-Auskehlung (88), die an einem Teil in der Kopfschiene (11) der Blende (10) unbeweglich angeordnet ist, ein Federelement (89), das zwischen einem Teil der Kopfschiene (11) und einem Teil des zylindrischen Getriebes (83) verbunden ist, um die bewegliche Einrichtung in der arretierenden Position zu stützen, und einen Getriebesatz (35), der mit dem zylindrischen Getriebe (83) in Eingriff steht und zwischen dem Krafteingangsende und dem Kraftausgangsende angeordnet ist,
dadurch gekennzeichnet, dass

Mittel zum Anhalten einer Rückwärtsübertragung der Kraft von dem Kraftausgangsende in Richtung des Krafteingangsendes bereitgestellt werden, und

ein gezahnter Kragen (87) um den Umfang des Stabelements (84) unbeweglich bereitgestellt ist und mit dem Stabelement (84) zwischen einer arretierenden Position, in der der gezahnte Kragen (87) mit der gezahnten Endlos-Auskehlung (88) in Eingriff steht, um das Stabelement (84) bei einer Drehbewegung zu sperren, und einer nicht arretierenden Position vertikal beweglich ist, in der der gezahnte Kragen (87) aus dem Eingriff der gezahnten endlos Auskehlung (88) gelöst vorliegt, so dass das Stabelement (84) durch die Steuerstange (40) gedreht werden kann.

2. Blendenhebesteuerungseinrichtung (20) nach Anspruch 1, worin die Übertragungseinrichtung (30, 54) eine Schnecke (31) umfasst, die dem Krafteingangsende entspricht und ein Schneckengetriebe (34), das dem Kraftausgangsende entspricht, wobei die Schnecke (31) und das Schneckengetriebe (34) miteinander in Eingriff stehen.

3. Blendenhebesteuerungseinrichtung (20) nach Anspruch 1, worin die Übertragungseinrichtung (30, 54) weiterhin einen Übertragungsgetriebesatz (35) umfasst, der zwischen das Krafteingangsende und das Kraftausgangsende gekoppelt und dazu angepasst ist, die Geschwindigkeit der Drehantriebskraft zu beschleunigen, die durch das Krafteingangsende aufgenommen wurde und dann die Drehantriebskraft durch das Kraftausgangsende auf die Spule (25) zu übertragen.

4. Blendenhebesteuerungseinrichtung (20) nach Anspruch 1, worin der Steuerstange (40) ein oberes Ende aufweist, das durch ein Gelenkstück (42) mit dem Krafteingangsende der Übertragungseinrichtung (30, 54) verbunden vorliegt.

5. Blendenhebesteuerungseinrichtung (20) nach Anspruch 1, worin die Steuerstange (40) ein unteres Ende aufweist, das mit einer klappbaren Handkurbel (44) bereitgestellt ist, wobei die klappbare Handkurbel (44) einen ersten Arm (45) aufweist, wobei der erste Arm (45) ein erstes Ende, das an dem unteren Ende der Steuerstange (40) gelenkig angebracht ist und ein zweites Ende aufweist, einen zweiten Arm (46), der ein erstes Ende, das an einem zweiten Ende des ersten Arms (45) gelenkig angebracht ist und ein zweites Ende aufweist, einen Griff (47), der an das zweite Ende des zweiten Arms (46) gekoppelt ist, um relativ zu dem zweiten Arm (46) frei gedreht werden zu können, und eine Hülse (48), die zur freien Drehbewegung die Steuerstange (40) umhüllt und entlang der Steuerstange (40) auf dem ersten Arm (45) und dem ersten Ende des zweiten Arms (46) axial beweglich ist, um die Steuerstange (40) zu halten, wobei der erste Arm (45) und der zweite Arm (46) mit einander abgestimmt sind.

6. Blendenhebesteuerungseinrichtung (20) nach Anspruch 1, worin die Steuerstange (40) an einem unteren Ende davon einen Kopplungsbereich aufweist, wobei die Blendenhebesteuerungseinrichtung (20) weiterhin eine Drehantriebseinrichtung aufweist, um lösbar mit dem Kopplungsbereich der Steuerstange (40) verbunden zu sein, um durch Betreiben des Benutzers die Steuerstange (40) zu drehen, wobei die Drehantriebseinrichtung einen Antriebsstab (62) umfasst, um eine durch den Benutzer angelegte Drehantriebskraft auszugeben, wobei der Antriebsstab (62) einen vorderen Kopplungsbereich aufweist, um mit dem Kopplungsbereich der Steuerstange (40) in Eingriff zu gelangen.

7. Blendenhebesteuerungseinrichtung (20) nach Anspruch 6, worin die Drehantriebseinrichtung mit der Hand betrieben wird.

8. Blendenhebesteuerungseinrichtung (20) nach Anspruch 7, worin die durch die Hand betriebene Drehantriebseinrichtung einen L-förmige Kurbelarm (61) umfasst, wobei der L-förmige Kurbelarm (61) ein erstes Ende, das in dem Antriebsstab (62) endet und ein zweites Ende aufweist, eine Hülse (48), die den Antriebsstab (62) umhüllt, um relativ zu dem Antriebsstab (62) und dem L-förmige Kurbelarm (61) frei gedreht zu werden, und einen Griff (47), der sich von einem zweiten Ende des L-förmigen Kurbelarms (61) senkrecht erstreckt.

9. Blendenhebesteuerungseinrichtung (20) nach Anspruch 6, worin die Drehantriebseinrichtung durch einen Motor angetrieben wird, wobei die durch den Motor angetriebene Drehantriebseinrichtung einen umschaltbaren Motor aufweist, der dazu angepasst ist, den Antriebsstab (62) zu drehen, eine Stromversorgung, die dazu angepasst ist, dem umschaltbaren Motor die erforderliche Arbeitsspannung bereitzustellen, und Schaltermittel (75), die dazu angepasst sind, die Drehbewegung des umschaltbaren Motors zu steuern.

10. Blendenhebesteuerungsverfahren zum Steuern der Drehbewegung von Spulen (25) in einer Kopfschiene (11) einer Blende (10), um Hubseile (96) der Blende (10) durch Drehen einer Steuerstange (40) aufzurollen oder abzurollen, um weiter den Blendenkörper (12) der Blende (10) zu heben oder zu senken, um weiter eine Übertragungseinrichtung (30, 54) in der Kopfschiene (11) der Blende (10) anzutreiben, um die Spulen (25) zu drehen, und wobei die Übertragungseinrichtung (30, 54) eine Übertragung von einer Drehantriebskraft aus Richtung der Spule (25) in Richtung der Steuerstange (40) verhindern kann, nachdem eine Sperrung der Drehbewegung der Steuerstange (40) beendet ist,
dadurch gekennzeichnet, dass

eine Rückwärtsübertragung einer Kraft von einem Kraftausgangsende in Richtung eines Krafteingangsendes gesperrt wird, und

ein gezahnter Kragen (87) um den Umfang des Stabelements (84) unbeweglich bereitgestellt und mit dem Stabelement (84) zwischen einer arretierten Position, in der der gezahnte Kragen (87) mit der gezahnten endlos Auskehlung (88) in Eingriff steht, um das Stabelement (84) an einer Drehbewegung zu hindern, und einer nicht arretierten Position vertikal bewegt werden kann, in der der gezahnte Kragen (87) aus dem Eingriff mit der gezahnten Endlos-Auskehlung (88) gelöst ist, um das Stabelement (84) durch die Steuerstange (40) drehen zu können.

11. Blendenhebesteuerungsverfahren nach Anspruch 10 weiter umfassend eine Handkurbel (44), die mit einem unteren Ende der Steuerstange (40) verbunden ist, um die Steuerstange (40) zu drehen.

12. Blendenhebesteuerungsverfahren nach Anspruch 10 weiter umfassend eine Drehantriebseinrichtung, die an einem unteren Ende der Steuerstange (40) lösbar verbunden ist, wobei die Drehantriebseinrichtung dazu angepasst ist mit der Hand oder elektrisch angetrieben zu werden, um die Steuerstange (40) zu drehen.

Revendications

1. Un mécanisme de levage pour store vénitien (20) installé dans un store (10) qui comprend un rail de tête (11) monté sur un côté supérieur d'une fenêtre et un corps de store (12) monté sous ledit rail de tête (11), ledit mécanisme de levage (20) comprenant :

au moins une bobine (25) fixée rotative audit rail de tête (11) dudit store (10) pour élever ou abaisser en rotation synchrone le corps de store (12) dudit store (10);

un mécanisme de transmission (30, 54) monté à l'intérieur dudit rail de tête (11) dudit store (10) et adapté pour faire tourner ladite bobine (25), ledit mécanisme de transmission (30, 54) comportant une entrée de force de rotation disposée dans une extrémité du rail de tête (11) ;

une sortie de force de rotation connectée à ladite bobine (25) ; et

une tringle de contrôle (40) suspendue verticalement à un côté latéral de la fenêtre et montée pivotante à l'entrée de force de rotation dudit mécanisme de transmission (30, 54) et adaptée pour faire tourner l'entrée de force dudit mécanisme de transmission (30, 54) par l'utilisateur et pour entraîner en outre ledit mécanisme de transmission (30, 54) à faire tourner ladite bobine (25) ; dans lequel

ladite entrée de force dudit mécanisme de transmission (30, 54) est un dispositif mobile, ledit dispositif mobile comportant un engrenage cylindrique (83) suspendu horizontalement à l'intérieur dudit rail de tête (11) dudit store (10), un membre de tringle (84) relié coaxialement audit engrenage cylindrique (83) et se prolongeant vers le bas hors dudit rail de tête (11) dudit store (10) et monté pivotant à une extrémité supérieure de ladite tringle de contrôle (40), une gorge dentée sans fin (88) logée fixe sur une partie à l'intérieur du rail de tête (11) dudit store (10), un membre ressort (89) connecté entre une partie du rail de tête (11) et une partie dudit engrenage cylindrique (83) pour supporter ledit dispositif mobile dans la position de blocage, et un ensemble d'engrenages (35) en prise avec ledit engrenage cylindrique (83) et logé entre ladite entrée de force et ladite sortie de force, caractérisé en ce que

des moyens sont disposés pour stopper la transmission de force inverse à partir de ladite sortie de force vers ladite entrée de force ; et

une bague dentée (87) est montée fixe autour de la périphérie dudit membre de tringle (84) et déplaçable verticalement avec ledit membre de tringle (84) entre une position de blocage dans laquelle ladite bague dentée engage ladite gorge dentée sans fin (88) pour stopper la rotation dudit membre de tringle, et une position de libération dans laquelle ladite bague dentée (87) est dégagée de ladite gorge dentée sans fin (88) pour permettre audit membre de tringle (84) d'être entraîné en rotation par la tringle de contrôle (40).

2. Le mécanisme de levage (20) tel que défini dans la revendication 1 dans lequel ledit mécanisme de transmission (30, 54) comprend une vis sans fin (31) correspondant à ladite extrémité d'entrée de force et un engrenage à vis sans fin (34) correspondant à ladite extrémité de sortie de force, ladite vis sans fin (31) et ledit engrenage à vis sans fin (34) étant engagés l'un avec l'autre.

3. Le mécanisme de levage (20) tel que défini dans la revendication 1 dans lequel ledit mécanisme de transmission (30, 54) comprend en outre un ensemble d'engrenages (35) couplé entre ladite extrémité d'entrée de force et ladite extrémité de sortie de force et adapté pour accélérer la vitesse d'une force d'entraînement rotatoire reçue par ladite extrémité d'entrée de force, et ensuite pour transmettre la force d'entraînement rotatoire à ladite bobine (25) au travers de ladite extrémité de sortie de force.

4. Le mécanisme de levage (20) tel que défini dans la revendication 1 dans lequel ladite tringle de contrôle (40) comporte une extrémité supérieure connectée à l'extrémité d'entrée de force dudit mécanisme de transmission (30, 54) par d'un joint universel (42).

5. Le mécanisme de levage (20) tel que défini dans la revendication 1 dans lequel ladite tringle de contrôle (40) comporte une extrémité inférieure pourvue d'une poignée de bras de manivelle rabattable (44), ladite poignée de bras de manivelle rabattable (44) comportant un premier bras (45), ledit premier bras (45) ayant une première extrémité montée pivotante à l'extrémité inférieure de ladite tringle de contrôle (40) et une seconde extrémité, et un second bras (46) comportant une première extrémité montée pivotante à une seconde extrémité dudit premier bras (45) et une seconde extrémité, une poignée (47) couplée à la seconde extrémité dudit second bras (46) pour rotation libre par rapport audit second bras (46), et une douille (48) emmanchée sur ladite tringle de contrôle (40) pour rotation libre et déplacement axial le long de ladite tringle de contrôle (40), ledit premier bras (45) et ledit second bras (46) étant alignés l'un avec l'autre.

6. Le mécanisme de levage (20) tel que défini dans la revendication 1 dans lequel ladite tringle de contrôle (40) comporte une portion de couplage à son extrémité inférieure; le mécanisme de contrôle de levage (20) comprend en outre un dispositif d'entraînement rotatoire pour être connecté de manière détachable à la portion d'accouplement de ladite tringle de contrôle (40) actionné par l'utilisateur pour faire tourner ladite tringle de contrôle (40), ledit dispositif rotatoire comprenant un tringle d'entraînement (62) pour restitution d'une force d'entraînement rotatoire appliquée par l'utilisateur, ladite tringle d'entraînement (62) comportant une portion de couplage avant pour engager la portion de couplage de ladite tringle de contrôle (40).

7. Le mécanisme de levage (20) tel que défini dans la revendication 6 dans lequel ledit dispositif d'entraînement rotatoire est actionné manuellement.

8. Le mécanisme de levage (20) tel que défini dans la revendication 7 dans lequel ledit dispositif d'entraînement rotatoire actionné manuellement comprend un bras de manivelle en forme de L (61), ledit bras de manivelle en forme de L (61) comportant une première extrémité aboutissant dans ladite tringle d'entraînement rotatoire (62) et une seconde extrémité, une douille (48) emmanchée sur ladite tringle d'entraînement pour rotation libre par rapport à ladite tringle d'entraînement (62) et audit bras de manivelle en forme de L (61), et une poignée (47) s'étendant perpendiculairement à partir de la seconde extrémité dudit bras de manivelle en forme de L (61).

9. Le mécanisme de levage (20) tel que défini dans la revendication 6 dans lequel ledit dispositif d'entraînement rotatoire est entraîné par un moteur, ledit dispositif d'entraînement rotatoire entraîné par moteur comportant un moteur réversible adapté pour faire tourner ladite tringle d'entraînement (62), une alimentation en énergie adaptée à fournir la tension de travail nécessaire audit moteur réversible et des moyens de commutation (75) adaptés à contrôler la rotation dudit moteur réversible.

10. Une méthode de levage de store vénitien pour contrôler la rotation de bobines (25) dans un rail de tête (11) d'un store (10) pour enrouler ou laisser se dérouler des cordes de levage (96) dudit store (10), pour ensuite lever ou abaisser le corps de store (12) dudit store (10) par rotation d'une tringle de contrôle (40), pour faire ensuite tourner un mécanisme de transmission (30, 54) dans ledit rail de tête (11) dudit store (10) pour faire tourner lesdites bobines (25) et permettre audit mécanisme de transmission (30, 54) d'empêcher la transmission d'une force d'entraînement rotatoire à partir de ladite bobine (25) en direction de ladite tringle de contrôle (40) après que la rotation ladite tringle de contrôle (40) soit stoppée ; caractérisée en ce que
la transmission de force inverse à partir d'une extrémité de sortie de force vers une extrémité d'entrée de force est stoppée ; et
une bague dentée (87) est montée fixe autour de la périphérie dudit membre de tringle (84) et déplaçable verticalement avec ledit membre de tringle (84) entre une position de blocage dans laquelle ladite bague dentée engage ladite gorge dentée sans fin (88) pour stopper la rotation dudit membre de tringle (84), et une position de libération dans laquelle ladite bague dentée (87) est dégagée de ladite gorge dentée sans fin (88) pour permettre audit membre de tringle (84) d'être entraîné en rotation par ladite tringle de contrôle (40).

11. La méthode de levage de store telle que définie dans la revendication 10 comprenant en outre une poignée de bras de manivelle connectée à une extrémité inférieure de ladite tringle de contrôle (40) pour faire tourner ladite tringle de contrôle (40).

12. La méthode de levage de store telle que définie dans la revendication 10 comprenant en outre un dispositif d'entraînement rotatoire connecté de manière détachable à une extrémité inférieure de ladite tringle de contrôle (40), ledit dispositif d'entraînement rotatoire étant adapté pour être actionné manuellement ou électriquement pour faire tourner ladite tringle de contrôle (40).

Drawing