EP2157273A1 - Dispositif d'enroulement - Google Patents

Dispositif d'enroulement Download PDF

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Publication number
EP2157273A1
EP2157273A1 EP08014887A EP08014887A EP2157273A1 EP 2157273 A1 EP2157273 A1 EP 2157273A1 EP 08014887 A EP08014887 A EP 08014887A EP 08014887 A EP08014887 A EP 08014887A EP 2157273 A1 EP2157273 A1 EP 2157273A1
Authority
EP
European Patent Office
Prior art keywords
winding
winding device
line
cord
pressure element
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.)
Withdrawn
Application number
EP08014887A
Other languages
German (de)
English (en)
Inventor
Joachim Müller
Christian Kunkel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Warema Kunststofftechnik und Maschinenbau GmbH
Original Assignee
Warema Kunststofftechnik und Maschinenbau GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Warema Kunststofftechnik und Maschinenbau GmbH filed Critical Warema Kunststofftechnik und Maschinenbau GmbH
Priority to EP08014887A priority Critical patent/EP2157273A1/fr
Publication of EP2157273A1 publication Critical patent/EP2157273A1/fr
Withdrawn legal-status Critical Current

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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
    • E06B9/28—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
    • 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
    • E06B2009/3225—Arrangements to aid the winding of cords rollers
    • 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
    • E06B2009/3225—Arrangements to aid the winding of cords rollers
    • E06B2009/3227—Axially moving rollers

Definitions

  • the present invention relates to a winding device for sun protection systems for winding elevator cords with a winding roll, on which the line windings are side by side wound up.
  • Such winding devices are known.
  • a winding device in which the cord is wound on a conical winding roll.
  • the cord enters at the larger diameter of the winding roll and is firmly connected to the end of the winding roll with the smaller diameter.
  • the line always wraps around the larger diameter and is then shifted to the smaller diameter when winding further turns, with the turns correspondingly loosening.
  • the disadvantage is that can develop under unfavorable operating conditions, for example in a complete line relief as a result of an obstacle in the trajectory of the blind of the sunshade, line flashovers that block the system, but at least can cause a skew of a bottom rail of the curtain.
  • the object of the present invention is to provide a winding device that allows under all circumstances safe winding the line windings without excessive skew and allows axially short winding rollers.
  • a winding device of the type mentioned in which an axially displaceable against a force pressure element is provided which exerts a lateral pressure force on the outermost cord winding, which has been wound up during a winding last or in a unwinding next Winding is unwound, wherein a line deflection deposits the outermost turn in the area between the pressure element and the other wound up other cord windings, and is further provided around the winding roller of a cylindrical casing whose distance from the winding roll is at least equal to the cord diameter and at most so large that overlapping side by side lying cord turns is excluded.
  • the solution according to the invention initially has the advantage that the force applied axially to the line windings ensures an optimally close juxtaposition of the line windings on the winding roll, so that the axial space requirement of the winding roll can be minimized.
  • the winding device without winding any predetermined pitch, the cord diameter can be chosen freely and always under all circumstances an optimal close arrangement of the turns is achieved.
  • the envelope prevents the overlapping of the individual windings, which could lead to an inclination of the sunshade extension profile or, in extreme cases, could cause malfunctions under the effect of the actuating force. It has been shown that even in the case of a complete cord relief, for example when the curtain is unilaterally blocked during a shutdown of the curtain, the winding device according to the invention is able to wind the cord without error again after issuing a certain cord length without any cord tension without that there are line overlaps, - knots or the like.
  • the winding device according to the invention can be realized in various ways, wherein a plurality of options exist, which of the aforementioned parts are rotationally rigid and which are designed to rotate and which of the functional element take over the function of the enclosure.
  • the pressure element may enclose the winding roll and preferably form the envelope, but in many applications, a housing is preferably provided, which consists of two halves, which together form the envelope.
  • the pressure element and the cord deflection are integrally formed, that is, the pressure element itself has the necessary for targeted bringing the cord to the outermost winding deflection.
  • the printing element torsionally rigid axially movable although in principle embodiments are conceivable in which a rotating pressure element deposits the cord as a stationary winding.
  • a spring element is provided, which is arranged between an axial stop and the pressure element and builds up the actuating force.
  • the spring element has the advantage of a constant pressure force and is particularly useful when the cord itself is only under a low voltage, for example, at very short Behanginn the sun protection system.
  • the cord deflection can be formed by a circumferential groove
  • the cord exit is formed by a radially inwardly facing opening. This opening leads the cord to the mentioned outermost winding in the region of the pressure surface of the pressure element.
  • an embodiment of the invention may be provided in which the actuating force is applied by the weight of the blind of the sunshade system itself.
  • the pressure element for line deflection has a circumferential groove, the line entry and line exit are provided axially on the end side facing the winding side of the pressure element.
  • the force acting on the cord weight force of the curtain pulls the pressure element against the outermost cord winding and builds on the inventively provided actuating force.
  • the circumferential groove formed arcuate is, wherein it lies in its middle course axially away from the line entry and the string exit. The resulting wrap also ensures a safe transfer of the weight of the curtain on the pressure element to form the force.
  • an embodiment may be particularly preferred in which two successively wound or unwound winding layers are provided, one above the other radially offset from one another lie and are separated by a winding tube.
  • the actuating forces then applied separately for both winding layers can preferably be formed by winding the first winding with the actuating force of a spring element and the second radially further outward second winding with a force acting on the line by the weight force of the hanging force is.
  • the embodiment with the two winding layers is quasi as a kind of combination of the previously discussed two embodiments for applying the actuating force, each with a winding layer.
  • Such an embodiment can for example be realized in that the pressure element is formed in two parts and both parts when winding or unwinding of the first winding form a torsionally rigid, axially displaceable composite, wherein a first part of the force on the outermost line winding in winding or unwinding first winding and the second part transmits the actuating force to the outermost cord winding when winding or unwinding the second winding.
  • the rotation of the two parts during the winding of the first winding can be achieved, for example, characterized in that both parts of the pressure element are guided axially movable in each case via a pin in an axial groove of a housing.
  • a circumferential groove is preferably provided at the end of the axial groove, so that after completion of the first winding of the pin with the first part of the pressure element is freely rotatable.
  • the first part of the pressure element which carries the winding tube, when it reaches its freely rotatable position in rotationally rigid engagement with the winding shaft passes.
  • a rotatable with the shaft driving ring is provided, at its end facing the pressure element frontally a first coupling half is provided which cooperates after completing the first winding with a second coupling half for torsionally rigid entrainment, which at the first Part of the pressure element is formed.
  • the two coupling halves may for example have a complementary toothing for a positive engagement, but there are also frictional entraining coupling halves possible.
  • Fig. 1 shows a longitudinal section of an upper rail 10 of a sunshade system, such as a folding or Venetian blind or a folding blinds, the curtain with a bottom rail (not shown) suspended on elevator cords 12 and by means of a winding device 14 in its extension length is adjustable. Shown is only a winding device 14 on one side of the plant, which usually at least one further winding device on the other side of the plant, possibly even more winding devices are provided in the central region for large plant widths.
  • a sunshade system such as a folding or Venetian blind or a folding blinds
  • the cord 12 is at its end by means of a knot 16 (see Fig. 3 ) is fixed in a bore 18 on a winding roll 20. In the region of a breakthrough 22, the cord 12 passes from there to a cylindrical winding diameter 24, on which the winding of the cord can be deposited. In the in Fig. 1 and 3 shown extended end position of the curtain, are on the winding diameter 24 three security windings 26 starting at a support surface 28 (see Fig. 6 ), which relieve the string attachment and act as a buffer.
  • the cord 12 is further guided by a guide groove 30 which is formed as a circumferential groove 30 in a deflecting element 32.
  • the guide groove 30 has both a line entry, seen from the winding out, as well as a cord exit 36 to the curtain (see 6, 7 and 9 ), which lie axially on the end face of the deflecting element 32, wherein the line outlet 36 is located radially outside of the line entry 34. Due to the formation of the arcuate guide groove or circumferential groove 30, the line profile is reversed by 180 °.
  • the cord 12 When cord exit 36 from the deflection element 32, the cord 12 is guided in an axial guide groove 38 with an axial course in a lower housing half 40 to a housing outlet point 41 and on to the opening 42 from the upper rail (see Fig. 1 and 2 ) from where the cord, which should ideally be dimensionally stable in cross-section, for example, guided with a soul, through a bore 44 in the lower housing part 40 and an opening in the upper rail 10 to the curtain, not shown.
  • the curtain can, As already mentioned, consist of fabric, pleats, blinds, slats and the like.
  • the winding roll 20 is positively connected with a hexagonal winding shaft 46 torsionally rigid. If the winding shaft 46 rotates, for example when it is driven by a motor or manually, the winding roll 20 also rotates radially, but remains axially fixed in the axial direction in the housing part 40 by means of a spring / groove connection 48.
  • the lower housing half 40 is itself form-fitting by a rectangular shoulder 50 (see Fig. 1 and 5 ) in a punch 52 (see Fig. 5 ) in the upper rail 10, also called upper box fixed.
  • the cord is wound on the winding diameter 24 and stored in laterally adjacent line twists.
  • the cord 12 runs from the circumferential / guide groove 30 through the line entry point 34 of the deflection element 32 between a last, already wound turn 54 (see Fig. 9 Due to this insertion of the last wound turns, the deflection element 32 shifts axially per turn around the cord diameter.
  • the end wall 56 always lies against the outermost, last wound turn. Since at the other, not shown end of the cord 12, a lower rail (not shown), depending on the type of system also called a drop profile, rail or the like, transfers their weight as a tensile force F on the cord 12.
  • This force causes the End wall 56 as a pressure surface on which thus also acting as a pressure element deflecting element 32 always exerts a force on the outermost turn 54 of the cord package 58.
  • the deflection element 32 itself is prevented by a guide cam 60, which engage in recesses 62 in the lower half of the housing (40) and an upper half of the housing 64, on a rotational movement.
  • the two housing halves 40, 64 enclose the wound string package 58, ie the distance from the inner diameter of the housing 40, 64 to the outer diameter 24 of the winding roll 20 corresponds at least to the cord diameter, but is so tight that two turns of the cord can not overlap.
  • the two housing halves 40, 64 are complementarily formed so that they can be arranged on the envelope each form the other housing half. Both housing halves 40, 64 can be interconnected, for example, by means of snap connections. In the axial direction, the two housing halves 40, 64 are fixed to each other by a spring retainer 65 by end walls 66 of both housing halves 40, 64 are enclosed by the spring retainer 65.
  • the cord can be wound completely gradient-independent, d. H. the device is suitable for a free choice of the cord diameter, wherein the pitch of the winding on the winding diameter 24 automatically results from the selected cord diameter.
  • a winding device 110 in which the force acting on the winding actuating force is not applied by the gravity of the curtain or its lower rail but by a spring element 100.
  • the cord 112 enters through a bore 114 in a lower housing half 116 of a stationary housing with a housing cover 118 and is deflected by 90 ° through a groove 120 in the housing 116 to a deflecting element 122 out.
  • the deflecting element 122 is guided axially movably with a guide nub 124 and at the same time prevented from rotating.
  • Another guide nubs 126 engages in a further guide groove 128 (see Fig. 12 ) in the upper case half 118.
  • the string end 130 (see Fig. 10 and 16 ) is fixed by means of a knot 132 on an axially fixed ring 134, which by means of at least one groove / spring connection 136 (see Fig. 12 ) is rotationally rigidly connected to a winding shaft 138.
  • the axial securing of the fixed ring 134 by means of a pin 140 (see Fig. 10 ), which engages in a bore 142 in the winding shaft 138.
  • the cord 112 extends further into a guide / Umlenknut 144 on the outer circumference of the deflecting element 122, which surrounds the winding shaft 138 like a sleeve like the embodiment described above.
  • the guide groove 144 guides the cord 112 and reverses the line direction from a line entry 146 (see FIG Fig. 14 ) in the region of the winding up to a cord exit 148, from which the cord 112 enters the groove 120, by 180 °.
  • the line runs through a radially inwardly pointing passage opening 150 (see FIG Fig. 15 and 18 ) from where it reaches the radially inner winding.
  • the cylindrical winding shaft 138 is formed as a grooved tube with at least one groove 152.
  • the cord 112 wraps around the winding shaft 138 serving directly as a winding roll, wherein it is enclosed by the deflecting element 122 in the effect of a sheath, again to exclude the overlap of individual cord turns, ie the inner diameter of the Deflection element 122 to the outer diameter of the winding shaft 138 corresponds at least to the cord diameter but is only so large that an overlap can be excluded.
  • the already mentioned spring element 100 is supported on a thrust bearing 154 on the housing 116, 118 and acts on the deflecting element 122 via a support surface 156.
  • the deflection element 122 acts on the outermost line winding in the action of a pressure element via an end wall 158 functioning as a pressure surface 160, ie the last wound twine 160.
  • each new turn applies to the end wall 158 and moves the deflector / pressure element 122 respectively by the amount of the cord diameter in the axial direction against the spring force of the spring 100.
  • Moved with each turn the deflection element 122 thus continues axially until the support surface 156 of the spring 100 abuts against a pin 162 projecting radially out of the housing 118.
  • This pin is in a bore 164 and represents the end point for the winding.
  • the pin to the housing 118 other types of attacks can be provided.
  • a locking ring 166 allows the torsionally rigid fixation of the winding shaft 138 to the housing 116, 118, wherein a deadlock by means of at least one grub screw 168 is possible.
  • the housing halves are correspondingly designed so that the lower half 116 can be used on envelope also as a housing cover 118. Holes 170 in the housing halves 116, 118 are used for pinning or screwing the two halves 116, 118 together, wherein the connection can also be realized by means of snap connections.
  • the unwinding is again in the reverse order, wherein in the unwound final state according to Fig. 10 again three security windings should remain on the winding shaft. Also in this winding device, the winding takes place independently of a predetermined pitch, so that the cord diameter is arbitrary.
  • the two embodiments described above have in common that only a particularly small axial space on the winding roll must be available through the pressed against each other line windings in the winding in order to wind a maximum number of turns and thus a maximum line length in this area can.
  • the axial space can be significantly reduced.
  • the string 212 in turn enters through a bore 218 in a lower housing half 220 of a fixed housing, the other housing half 222 forms a housing cover, wherein the cord 212 is deflected by 90 ° to a deflecting element 224 out. In this case, it is guided in an axial groove 226 in the lower housing half 220. In this groove 226, in turn, the deflecting element 224 is guided axially movable by means of a guide nub 228, but secured against rotation, wherein another guide nub 230 (see, eg, FIG. FIGS. 22 and 23 ) is guided in a further groove 232 in the upper housing half 222.
  • a string end 234 is fixed by means of a knot 236 to a fixed ring 238, which by means of a tongue and groove connection 240 (see Fig. 21 ) is rigidly connected to a rotatable winding shaft 244. Axially, the ring 238 is locked by means of a pin 246 with the winding shaft 244, which engages in a bore 248 in the winding shaft 244.
  • the cord passes through an aperture 252 in a winding sleeve 254 which also forms the wrapper for the first winding 214 so as not to overlap in its region comes.
  • the cord extends over an axial end-face entry point 256 (see Fig. 23 and 27 ) in a guide groove 258 in the deflecting element 224.
  • This guide groove 258, which in turn is formed as a circumferential groove, returns the line direction from the above Schnureintritt 256 to an axially end-side, radially further outside line exit 260 (see also Fig. 27 ) by 180 °, wherein the winding shaft 244 is again designed as a grooved tube with at least one groove 262.
  • the cord 212 When the winding shaft 244 rotates, the cord 212 initially winds around the winding shaft 244, which acts as the first winding roll, and is tightly enclosed by the winding sleeve 254 to avoid overlaps.
  • a coil spring 264 is arranged between a support bearing 266 on a driving ring 268, which is rotationally fixed by means of a grub screw 270 axially fixedly connected to the winding shaft 244, and the winding sleeve 254, whereby an end wall 272 of this winding sleeve 254 as a pressure surface, the force of the compression spring 264 as a force to the outermost turn of the first winding 214 can transmit.
  • the cord 212 lays between the end wall 272 and the last wound twine 274 (see FIG Fig. 24 ), wherein each new turn by abutment against the end wall 272 by the amount of the cord diameter, the winding sleeve 254 axially against the spring force of the compression spring 264 in the direction of the driving ring 268 moves.
  • a shoulder 276 abuts the end of the guide sleeve 254 facing away from the pressure surface 272, as long as the first winding 214 is wound up. This creates a distance between the pressure surface 272 and an end wall 278 at the end of the deflection element 224 facing the outermost turn, which is at least as large as the cord diameter, so that the cord is not jammed when passing through the opening 252.
  • the winding tube 254 is prevented by a pin 279 by a rotational movement, that this engages in a guide track 280 in the housing. With each winding, the guide sleeve 254 is further moved until the pin 279 dips into a circumferential groove 282 formed in the housing 220, 222, so as to allow rotational movement of the winding sleeve 254 is.
  • the housing halves 220, 222 are in turn designed so that they can be used simultaneously as a lower half 220 or on cover also as a housing cover 222, wherein holes 290 of the attachment of the two housing halves 220, 222 serve each other.
  • FIGS. 24, 25 and 27 can be clearly seen, removed during the formation of the second winding 216 also acting on its pressure surface 278 as a pressure element deflecting element 224 axially from the winding sleeve 254.
  • the axial movement of the deflection element 224 is thus reversed in the transition from the first winding 214 to the second winding 216, without the winding sleeve 254 of this movement then follows.
  • the unwinding runs in the reverse order, wherein first the second winding 216 is unwound until the stop 276 of the deflecting axially against the winding sleeve 254, whereupon separating the coupling elements 284, 286, the winding sleeve 254 together with the deflecting element 224 axially from the driving ring 268 away until the in Fig. 19 shown completely unwound state with three remaining security windings 250 is reached.
EP08014887A 2008-08-22 2008-08-22 Dispositif d'enroulement Withdrawn EP2157273A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08014887A EP2157273A1 (fr) 2008-08-22 2008-08-22 Dispositif d'enroulement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08014887A EP2157273A1 (fr) 2008-08-22 2008-08-22 Dispositif d'enroulement

Publications (1)

Publication Number Publication Date
EP2157273A1 true EP2157273A1 (fr) 2010-02-24

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP08014887A Withdrawn EP2157273A1 (fr) 2008-08-22 2008-08-22 Dispositif d'enroulement

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EP (1) EP2157273A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103266847A (zh) * 2012-09-29 2013-08-28 杭州欧卡索拉科技有限公司 百叶窗销轴卷轮机构与不完全齿轮翻转机构的卷轮系统
US20220325576A1 (en) * 2021-04-12 2022-10-13 Ching Feng Home Fashions Co., Ltd. Cord winding assembly with sliding guide member and window blind using the cord winding assembly

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0409786A1 (fr) 1989-07-17 1991-01-23 Somfy Dispositif universel d'enroulement de cordes, câbles et similaires
DE69309127T2 (de) 1992-01-30 1997-10-02 Somfy Wickelvorrichtung für die Aufhängungsseile eines Stores
DE69508549T2 (de) 1995-01-04 1999-09-02 Somfy Wickelvorrichtung für Tragebänder von Jalousien
US20020050539A1 (en) * 2000-07-21 2002-05-02 Anderson Richard N. Counter wrap cord drive
DE202006001625U1 (de) 2006-02-02 2006-04-06 Lin, Ke-Min Wickelvorrichtung für eine Jalousie

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0409786A1 (fr) 1989-07-17 1991-01-23 Somfy Dispositif universel d'enroulement de cordes, câbles et similaires
DE69309127T2 (de) 1992-01-30 1997-10-02 Somfy Wickelvorrichtung für die Aufhängungsseile eines Stores
DE69508549T2 (de) 1995-01-04 1999-09-02 Somfy Wickelvorrichtung für Tragebänder von Jalousien
US20020050539A1 (en) * 2000-07-21 2002-05-02 Anderson Richard N. Counter wrap cord drive
DE202006001625U1 (de) 2006-02-02 2006-04-06 Lin, Ke-Min Wickelvorrichtung für eine Jalousie

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103266847A (zh) * 2012-09-29 2013-08-28 杭州欧卡索拉科技有限公司 百叶窗销轴卷轮机构与不完全齿轮翻转机构的卷轮系统
CN103266847B (zh) * 2012-09-29 2015-03-25 杭州欧卡索拉科技有限公司 百叶窗销轴卷轮机构与不完全齿轮翻转机构的卷轮系统
US20220325576A1 (en) * 2021-04-12 2022-10-13 Ching Feng Home Fashions Co., Ltd. Cord winding assembly with sliding guide member and window blind using the cord winding assembly

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