EP2593627A1 - Control system for architectural coverings with reversible drive and single operating element - Google Patents
Control system for architectural coverings with reversible drive and single operating elementInfo
- Publication number
- EP2593627A1 EP2593627A1 EP11727926.5A EP11727926A EP2593627A1 EP 2593627 A1 EP2593627 A1 EP 2593627A1 EP 11727926 A EP11727926 A EP 11727926A EP 2593627 A1 EP2593627 A1 EP 2593627A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- planet carrier
- control unit
- ring gear
- rotation
- rotational
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002441 reversible effect Effects 0.000 title description 3
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 230000033001 locomotion Effects 0.000 claims abstract description 14
- 230000003252 repetitive effect Effects 0.000 claims abstract description 9
- 230000000295 complement effect Effects 0.000 claims description 4
- 238000004804 winding Methods 0.000 claims description 4
- 241000239290 Araneae Species 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 5
- 230000008901 benefit Effects 0.000 description 3
- 230000014509 gene expression Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002040 relaxant effect Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
- E06B9/26—Lamellar or like blinds, e.g. venetian blinds
- E06B9/262—Lamellar or like blinds, e.g. venetian blinds with flexibly-interconnected horizontal or vertical strips; Concertina blinds, i.e. upwardly folding flexible screens
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
- E06B9/26—Lamellar or like blinds, e.g. venetian blinds
- E06B9/262—Lamellar or like blinds, e.g. venetian blinds with flexibly-interconnected horizontal or vertical strips; Concertina blinds, i.e. upwardly folding flexible screens
- E06B2009/2622—Gathered vertically; Roman, Austrian or festoon blinds
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
- E06B9/24—Screens or other constructions affording protection against light, especially against sunshine; Similar screens for privacy or appearance; Slat blinds
- E06B9/26—Lamellar or like blinds, e.g. venetian blinds
- E06B9/28—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable
- E06B9/30—Lamellar or like blinds, e.g. venetian blinds with horizontal lamellae, e.g. non-liftable liftable
- E06B9/32—Operating, guiding, or securing devices therefor
- E06B9/322—Details of operating devices, e.g. pulleys, brakes, spring drums, drives
Definitions
- This invention relates to retractable coverings for architectural openings, and more particularly, an operating system for controlling retractable coverings for architectural openings using a single operating element for manual actuation.
- the present invention provides for a retractable coverings for architectural openings utilizing a control system having a single operating element allowing a user to move a retractable covering for architectural openings between extended and retracted positions by imparting a repetitive motion to the operating element.
- a user can raise or lower the retractable covering by imparting a repetitive up and down motion to the pull cord.
- Examples of such coverings are known from e.g. EP 1455049, EP 1728963, and WO 2008/094720 where an operating cord can be pulled from an operating cord spool and a spring motor in the spool retracts the cord such that a repetitive pull cord motion is possible.
- the operating spool drives an input assembly.
- the direction and position in which the pull cord is manipulated will engage a shift arm which acts on the input assembly and together with additional means dictates the direction of rotation of an output means relative to the direction of rotation of the input assembly.
- the input assembly includes a planetary gear transmission with a sun gear integrally connected to the operating pull cord spool, a planet carrier with planet gears, a spider and a ring gear.
- the spool rotates in counter clockwise direction.
- the sun gear is integral with the operating spool it also rotates in counter clockwise direction.
- a shift arm pivots and a pawl tooth engages ratchet teeth on an outer circumference of the planet carrier, which prevents the planet carrier from rotating.
- the counter clockwise rotation of the sun gear now causes clockwise rotation of the planet gears, which in turn engage the ring gear - acting as a second motion transfer element - to turn in a clockwise direction.
- the shift arm does not pivot and the planet carrier is allowed to rotate, which it does in counter clockwise direction.
- the planet carrier engaged the spider to turn in counter clockwise direction and the spider acts as a one-way clutch and engages the ring gear in counter clockwise rotation.
- the transmission is operative to translate rotation of the input sun gear into either the same direction or the opposite direction of rotation of the output ring gear by a combination of the shift arm and the spider, which together dictate the direction of rotation of the ring gear relative to the direction of rotation of the sun gear.
- a drawback of this system is that for the spider to be able to engage the ring gear the ring gear requires a special shape because the spider will engage an inner toothed rim of the ring gear with one or more of its legs.
- the ring gear thus needs to surround at least that part of the planet carrier which carries the spider. This results in a relatively large outer diameter of the transmission and thus of the input/output assemblies.
- the space such as space provided in a head rail, is generally very limited and constrained.
- control unit for rotationally driving, in a selected one of rotationally opposite directions, a mechanism for moving a covering for an architectural opening between extended and retracted positions, the control unit including:
- a housing having a generally cylindrical cavity therein;
- a rotational input member for engagement by the single operating element and journalled with respect to the cylindrical cavity for rotation movement between first and second rotational positions
- a planet carrier and a plurality of planet gears engaged by the sun wheel a ring gear engaged by the planet gears, the planet gears being each rotationally supported on the planet carrier and the planet carrier and ring gear being each rotationally supported with respect to the cylindrical cavity; a rotational output member, adapted to be driven by the ring gear; and control means operative to translate rotation of the sun gear in rotation of the ring gear in one of rotation in the same direction and rotation in an opposite direction with respect to rotation of the sun gear, wherein the direction of rotation is dictated by selective operating the single operating element in one of a first position of angular deflection and in a second position of angular deflection.
- control means further includes a shift arm rotationally supported about an axis parallel to the axis of rotation of the rotational input member, the shift arm being adapted to be engaged by the single operating element in the first position of angular deflection, so as to cause engagement with the planet carrier to arrest the planet carrier in a stationary position and adapted to be disengaged by the single operating element in a second position of angular deflection, so as to allow rotation of the planet carrier. It is thereby further advantageous when the shift element can be engaged by the single operating element, upon manual actuation thereof, in a first angular direction to hold the planet carrier stationary and in a second angular direction to allow the planet carrier to rotate.
- a particularly advantageous embodiment will be obtained when a switch ring is operatively engaged between the planet carrier and the ring gear to couple the planet carrier to the ring gear in one of opposite rotational directions, thereby the rotational output member rotates in the same direction as the rotational input member when the planet carrier is coupled to the ring gear and rotates in a direction opposite thereto, when the planet carrier is held stationary. Furthermore it will be advantageous in such an arrangement, when the switch ring is brought into and out of engagement with the ring gear by moving in an axial direction through rotation of the planet carrier.
- Such a control unit can advantageously also be arranged to have the planet carrier comprise a helical track on a perimeter thereof, and provide the switch ring with a protrusion engaging the helical track of the planet carrier.
- the control unit can be further improved when the shift arm has a pawl tooth adapted to engage with ratchet teeth on an outer circumference of the planet carrier.
- the switch ring has a first set of ratchet teeth on an axial face thereof facing an axial end of the ring gear, and wherein the ring gear has a complementary set of ratchet teeth on its axial end facing the set of ratchet teeth on the switch ring.
- the single operating element can advantageously be a flexible element and the rotational input member can be an operating cord spool for storable receipt of windings of the operating element.
- the sun gear may project from an axial end surface of the operating cord spool.
- the control unit may be further improved by the return mechanism including a coil spring.
- the control unit may also advantageously further include an automatic brake mechanism operatively engaged between the cylindrical cavity and each of the ring gear and the rotational driven member.
- an automatic brake mechanism may include a wrap spring.
- the control unit according to the invention may further benefit from the ring gear being shaped as a cylindrical body comprising a toothed inner
- the invention also includes a covering for an architectural opening including: at least one covering that is retractable and extendible by a mechanism for moving the at least one covering member between extended and retracted positions, and a control unit of the invention.
- a covering may be advantageously improved when the mechanism for moving comprises a system for winding and unwinding at least one lift cord onto and from a cord spool by driving the cord spool in a first direction or a second direction by the control unit.
- Figure 1 is a schematic view of a window covering with a head rail depicted partially depicted open to show the control system according to the invention
- Figure 2 is a perspective view showing the control unit in isolation
- FIG. 3 is an exploded view of the control system of the invention.
- FIG. 4 is a cross- sectional view of the control system of the invention.
- Figure 5 is a partial detail view of the operating cord, operating spool, and shift arm.
- Figure 1 shows a roman shade 1 with head rail 3 in which on a driven shaft 5 a pair of left and right lift cord spools are mounted 7, 9.
- the shade further includes shade material 11, a bottom bar 13 and a pair of left and right lift cords 15, 17.
- Each lift cord is connected with a first end 15A, 17A to the respective left or right lift cord spools 7, 9 and with another end 15B, 17B to the bottom bar 13.
- the lift cord spools 7, 9 are driven to rotate in a first direction to lift the bottom bar 13 and retract the shade material 11, the left and right cords 15, 17 are wound about the respective left and right spools 7, 9 and the shade is lifted or retracted.
- a control unit 19 is mounted in the head rail and drivingly connected to one end of the driven shaft 5.
- the control system includes a housing 21 and an opening 23 through which an operating cord 25 extends.
- the operating cord includes an operating length 25A and a manipulating length 25B separated by a stopper 27.
- the stopper prevents the manipulating length 25B of the operating cord being retracted into the housing 21 and onto the operating cord spool (not shown in this Figure).
- the manipulating length 25B of the operating cord 25 is provided at its free end with a tassel 29.
- control unit 19 is shown separate from the head rail and roman shade of Figure 1.
- the control unit 19 has a substantial cylindrical housing 21.
- the operating cord 25 extends with its operating end 25A from the opening 23 of a cord guide 33 attached to the housing 21.
- Left and right hand end caps 24, 26 close off the axial ends of housing 21 and a rotational output member 30 for driving the driven shaft 5, protrudes axially from the left hand end cap 24.
- the left hand end cap 24 has arms 28 extending axially over the outer
- the control unit 19 is shown further in an exploded view in Figure 3.
- the control unit 19 includes housing 21 which is a generally cylindrical hollow body having a left 21 A and a right end 2 IB to which the left and right end caps 24, 26 can be mounted.
- the left end cap has axially extending arms 28 which snap onto protrusions 29 on the outer circumference of the housing and thus secure the end cap to the housing.
- a cut-out 31 is provided in the housing adjacent its right end 2 IB for receiving the cord guide 33 therein.
- the cord guide 33 thereby is mounted adjacent to the operating cord spool 35.
- the operating cord spool 35 is a cylindrical body having an outer circumference 37 about which the operating cord 25 can be wound.
- the right end cap 26 houses a clock spring 39.
- the clock spring is effective in biasing the operating cord spool 35 to a first end position in which the operating cord 25 is would with its operating length 25A onto the outer circumference 37 of the cord spool 35.
- the shift arm 41 is pivotaUy mounted on a shaft 43.
- a sun gear 45 extends axially of the operating cord spool 25 and may be guided by an optional bearing plate 47 before extending centrally through a planet carrier 49.
- the planet carrier 49 has a plurality of shafts 51 for rotatively receiving an equal number of planet gears 53.
- the shafts 51 are separated by posts 55.
- the shafts 51 and posts 55 have their free ends engaged by an annular cage 57.
- the planet carrier has radial ratchet teeth 59 on axial right hand end thereof.
- Immediately to the axial left of the ratchet teeth 59 the planet carrier cylindrical boss 61 on which perimeter surface helical tracks in the form of helix grooves 63 are formed.
- a switch ring 65 is rotatively received about the cylindrical boss 61.
- the switch ring 65 has inwardly projecting fingers 67 (three of which are visible in Figure 3), for engaging the helix grooves 63.
- the switch ring 65 On an axial left hand face thereof the switch ring 65 is provided with axial ratchet teeth 69.
- the axial ratchet teeth 69 of the switch ring 65 can engage complementary ratchet teeth 71 on a right hand axial end of a ring gear 73.
- the ring gear 73 has internal gear teeth (not visible in Figure 3, but conventional for planetary gear arrangements) that mesh with the planet gears 53 when the planet carrier 49 is inserted in its interior.
- the radial ratchet teeth 59 on the planet carrier 49 cooperate with a detent 75 on the shift arm 41.
- the planet carrier 73 on a left hand axial end thereof has opposite wrap spring contractor abutment surfaces 77, 79 to extend inwardly of a wrap spring 81.
- the rotational output member 30 has a wrap spring expanding finger 83 extending axially from a left hand axial end of the rotational output member 30.
- the wrap spring 81 in its relaxed state engages an inner circumferential surface of the housing 21.
- the entire assembly of Figure 3 in assembled condition is held together by the right hand and left hand end caps 24, 26. To this end the axially extending arms 28 of the left hand end cap 24 engage with the protrusions 29.
- the right hand end cap 26 has axially extending arms 85 engaging protrusions 87 on the outer surface of housing 21.
- FIG 4 shows a longitudinal cross section of the control unit 19 in its assembled condition. It is easily seen that the operating cord spool 35, the planet carrier 49, ring gear 73 and output member 30 all fit snugly within the interior of the housing 21.
- the switch ring 65 is in axial engagement with the ring gear 73, through the complementary ratchet teeth 69, 71. In this position the switch ring 65 has its inwardly projecting fingers 67 (visible only in Figure 3) abutted against axially extending end surfaces of the relevant helix grooves 63.
- the planet gear will rotate together with the ring gear 73.
- the operating cord 25 is pulled in repetitive strokes and thereby only
- the operating cord spool 35 Once the operating cord spool 35 has reached its second end position in which the operating length 25A of the operating cord has been fully unwound from its outer circumference 37, the operating cord 25 is relaxed and allowed to rewind itself under the action of the clock spring 39. During this movement the wrap spring 81 reengages the inner circumference of the housing 21. This will hold the shade material and bottom bar in the adjusted position. Should the weight of the adjusted shade and bottom rail be urging on the output member 30, this will only engage one of the inwardly bend spring tangs 81A, 81B of wrap spring 81 and thereby reinforce its grip on the inner surface of the housing 21 by further expanding the wrap spring 81. The wrap spring 81 thus functions as an automatic brake means to retain the shade in its adjusted position.
- the operating cord spool 35 While the output member 30 is kept stationary the operating cord spool 35 is returned to its first position by the clock spring 39 and the operating length 25A of the operating cord is rewound on the outer circumference 37 of the cord spool 35. During this reverse motion of the operating cord 25 and cord spool 35, the switch ring 65 is moved out of engagement with the ring gear 73 as it is being moved to the right by the helical grooves 63 acting on the inwardly directed fingers 67. In the first end position of the operating cord spool 35, the operating cord 25 can be
- the operating cord 25 in a second position of angular deflection.
- the second position of angular deflection of the operating cord 25 is shown in firm lines in Figures 3 and 5.
- the operating cord 25 is effective to bring the shift arm 41 and its detent 75 into engagement with the radial ratchet teeth 59 of the planet carrier 49.
- the operating cord 25 with its operating length 25A is routed behind a cylindrical portion of shaft arm 41, with which it is jounalled on its shaft 43. Frictional engagement of this cylindrical portion by the cord 25 will rotate the detent 75 in engagement with the ratchet teeth 59.
- the mechanism just described is very effective in offering two modes of operation—i.e. lowering and raising— by a single operating element. It also offers an ergonomically optimal length of manual pull, that is independent of the size of the window covering. Furthermore the single depending cord element for operating the window covering offers child safety over the conventional looped operating cords.
- control system having a single operating element allowing a user to move a retractable covering for architectural openings between extended and retracted positions by imparting a repetitive motion to the operating element including:
- the spool having an outer circumference 37 about which the operating element can be wound and an axial surface from which a first or sun gear 45 projects,
- the transmission further including a plurality of planet gears 53 on a planet carrier 49 and a ring gear 73,
- the ring gear having the shape of a cylindrical body comprising an inner circumferentially toothed ring-like surface acting as the ring gear for cooperation with the planet gears,
- said means comprise - a shift arm 41 pivotally supported on an axis parallel to the axis of rotation of the cord spool and adjacent the cord spool such that in operational friction between the operating element and the shift arm causes the shift arm to pivot and engage the planet carrier thus arresting the planet carrier against rotating,
- a switch ring 65 rotatably mounted on a helical track 63 formed on the outer circumference 61 of the planet carrier such that when the planet carrier rotates this rotation pushes the switch ring in axial direction towards the ring gear until the switch ring engages an axial end of the ring gear and thus couples the planet carrier to rotate as one with the ring gear body.
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Operating, Guiding And Securing Of Roll- Type Closing Members (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP11727926.5A EP2593627B1 (en) | 2010-07-14 | 2011-06-24 | Control system for architectural coverings with reversible drive and single operating element |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10169575 | 2010-07-14 | ||
EP11727926.5A EP2593627B1 (en) | 2010-07-14 | 2011-06-24 | Control system for architectural coverings with reversible drive and single operating element |
PCT/EP2011/003116 WO2012007094A1 (en) | 2010-07-14 | 2011-06-24 | Control system for architectural coverings with reversible drive and single operating element |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2593627A1 true EP2593627A1 (en) | 2013-05-22 |
EP2593627B1 EP2593627B1 (en) | 2014-05-14 |
Family
ID=44627577
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11727926.5A Active EP2593627B1 (en) | 2010-07-14 | 2011-06-24 | Control system for architectural coverings with reversible drive and single operating element |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2593627B1 (en) |
DK (1) | DK2593627T3 (en) |
WO (1) | WO2012007094A1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU2012101508A4 (en) * | 2012-10-04 | 2012-11-08 | Acmeda Pty Ltd | Spindle cover |
CN105525857B (en) * | 2016-02-04 | 2017-05-10 | 王海锋 | Curtain controller |
US11866994B2 (en) | 2019-02-04 | 2024-01-09 | LG Energy Solution, LTD | Roller blind actuation mechanism, spool housing assembly and cable-covering tube system for a roller blind actuation assembly |
TWI709685B (en) * | 2019-08-22 | 2020-11-11 | 程田有限公司 | Curtain controller |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7128126B2 (en) | 2003-03-04 | 2006-10-31 | Hunter Douglas Inc. | Control system for architectural coverings with reversible drive and single operating element |
US7578334B2 (en) | 2005-06-03 | 2009-08-25 | Hunter Douglas Inc. | Control system for architectural coverings with reversible drive and single operating element |
US8186413B2 (en) | 2007-01-29 | 2012-05-29 | Hunter Douglas Inc. | Control system for architectural coverings with reversible drive and single operating element |
-
2011
- 2011-06-24 DK DK11727926.5T patent/DK2593627T3/en active
- 2011-06-24 WO PCT/EP2011/003116 patent/WO2012007094A1/en active Application Filing
- 2011-06-24 EP EP11727926.5A patent/EP2593627B1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2012007094A1 * |
Also Published As
Publication number | Publication date |
---|---|
DK2593627T3 (en) | 2014-08-25 |
EP2593627B1 (en) | 2014-05-14 |
WO2012007094A1 (en) | 2012-01-19 |
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