EP2889448B1 - Ball chain connector and method of releasably connecting together ball chain ends - Google Patents

Ball chain connector and method of releasably connecting together ball chain ends Download PDF

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Publication number
EP2889448B1
EP2889448B1 EP14004357.1A EP14004357A EP2889448B1 EP 2889448 B1 EP2889448 B1 EP 2889448B1 EP 14004357 A EP14004357 A EP 14004357A EP 2889448 B1 EP2889448 B1 EP 2889448B1
Authority
EP
European Patent Office
Prior art keywords
ball
ball chain
connector
shaped connector
chain
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.)
Active
Application number
EP14004357.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2889448A1 (en
Inventor
David Martin
Nico Dekker
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.)
Hunter Douglas Industries BV
Original Assignee
Hunter Douglas Industries BV
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 Hunter Douglas Industries BV filed Critical Hunter Douglas Industries BV
Priority to PL14004357T priority Critical patent/PL2889448T3/pl
Publication of EP2889448A1 publication Critical patent/EP2889448A1/en
Application granted granted Critical
Publication of EP2889448B1 publication Critical patent/EP2889448B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E06B9/326—Details of cords, e.g. buckles, drawing knobs

Definitions

  • the present invention relates to a ball chain connector and a method of releasably connecting together ball chain ends, in particular allowing the ball chain ends to break apart from one another.
  • Ball chains are well known in the prior art for operating architectural coverings, for example raising or lowering the cover.
  • Such a ball chain comprises a series of beads/ balls connected together by flexible member sections such that the chain as a whole is flexible and the balls can engage with a pulley wheel to operate the architectural covering.
  • JP 2011-027174 proposes the use of a connector having one part that is fixed to one ball chain end and another part that is fixed to another ball chain end. The two connector parts are attached to one another in a releasable manner.
  • GB 2,479523 and KR 101252028 propose a similar arrangement in which the connector parts of GB 2,479523 are held together with magnets and the connector parts of KR 101252028 are held together via a ball-shaped connector on one of the parts that resiliently fits in a cavity of the other part.
  • CA 2708468 proposes a connector fixed to the flexible member section at one end of the ball chain and provided with a resilient receiving cavity for receiving a ball at the other end of the ball chain. Under load, the resilient cavity is able to deflect outwardly to release the ball held within the cavity.
  • the present invention aims to overcome or at least reduce some of these problems.
  • a method of releasably connecting together ball chain ends includes securing the ball chain ends to respective first and second part of a ball chain connector and releasably connecting together the first and second parts.
  • the method provides for releasably connecting together the first and second parts by using a ball-shaped connector on the first part that can fit into a side opening in the second part.
  • the method provides for the second part to resiliently hold the first part within resiliently deflectable walls.
  • a ball chain connector for use with ball chains having a series of balls connected together by flexible member sections.
  • the ball chain connector is for connecting together two ball chain ends.
  • the ball chain connector includes a first part and a second part.
  • the first part defines a cavity receiving an end ball at the end of a ball chain and a first through hole for passing a flexible member section of the ball chain and the second part defines a second cavity receiving an end ball at the end of a ball chain and a second through hole for passing a flexible member section of the ball chain.
  • the first part includes a ball-shaped connector at the distal end of a stem extending opposite to said first through hole and the second part includes a resilient wall opposite said second through hole and configured to receive and resiliently hold said ball-shaped connector.
  • the resilient wall also defines a connection aperture from which at least the stem extends and possibly a smaller part of the ball-shaped connector.
  • the resilient wall further defines a side opening, between the second through hole and the connection aperture, into which the ball-shaped connector can be inserted.
  • the resilient wall is configured to be resiliently deflected so as to release the ball-shaped connector and allow the first and second parts to separate.
  • a ball chain together with a ball chain connector and also an architectural covering including such a ball chain and ball chain connector.
  • first and second parts of the connector can be produced specially for this purpose, production tolerances can be provided that ensure accurate and consistent breakaway forces.
  • the first and second parts can easily be arranged to accept end balls within a wide range of varying sizes without affecting the functionality of the ball chain connector.
  • Use of a ball-shaped connector is advantageous by its effectiveness as a releasable connection together with ease and low cost of manufacture.
  • the first part may be considered to extend in an elongate direction between the first through hole and the ball-shaped connector.
  • the ball chain connector may include a first side wall extending between the first through hole and the ball-shaped connector.
  • the first side wall may define a first opening into which an end ball of a ball chain can be inserted.
  • the first side wall of the first part may further define a first slot joining the first opening to the first through hole. This first slot allows a flexible member section of a ball chain extending from the end ball to be moved/guided from the first opening to the first through hole.
  • the ball chain connector provides a simple means of fitting the first part to an end ball of a ball chain.
  • the end ball may be inserted through the first opening into the first cavity and then rotated such that the flexible member section extending from that end ball passes through the first slot so as to extend out through the first through hole. Under load, the end ball is held securely within the first cavity with the flexible member section extending out of the first through hole.
  • the side wall portion defining the first opening may have some resilience and the first opening to be provided with a size slightly smaller than an end ball. In this way, a user may push the end ball into the first opening against some resilient resistance with the end ball then being held securely within the first cavity.
  • the second part may be considered to extend in an elongate direction between the second through hole and the connection aperture.
  • the second part may include a second side wall between the second through hole and the connection aperture.
  • the second side wall may define a second opening into which an end ball of a ball chain can be inserted.
  • the second side wall of the second part may further define a second slot joining the second opening to the second through hole so as to allow a flexible member section of a ball chain to be moved/guided from the second opening to the second through hole.
  • an end ball may be inserted through the second opening into the second cavity and rotated so that the flexible member section passes from the second opening to the second through hole. The end ball is thus securely held within the second cavity.
  • the side wall portion defining the second opening may be resilient and may define a second opening slightly smaller than the end ball so as to securely hold the end ball within the second cavity.
  • the second part is configured to hold within it both an end ball of a ball chain and the ball-shaped connector of the first part, its outer elongate extent may be greater than the outer elongate extent of the first part between the first through hole and the stem of the ball-shaped connector.
  • the resilient wall may further define a side slot extending from the side opening to the connection aperture.
  • the side slot allows the stem of the ball-shaped connector to be moved/guided from the side opening to the connection aperture when the ball-shaped connector is rotated within the hold of the resilient walls.
  • the side opening defined by the resilient wall may be smaller than the ball-shaped connector.
  • the resilient wall may be configured to resiliently deform so as to allow the ball-shaped connector to pass within and be received by the resilient wall.
  • the ball-shaped connector may be held resiliently within the resilient wall.
  • the size of the side opening and the resilience of the resilient wall may be arranged to allow the ball-shaped connector to be more easily pushed into the second part through the side opening than through the connection aperture.
  • the resilient wall and the ball-shaped connector predetermined size relationship resulting in a predefined breakaway force required to pull the ball-shaped connector from the resilient wall.
  • the first and second part of the chain connector become separated when the ball chain is loaded with a weight of about 5 to 6 kg.
  • the predetermined size relationship between the ball-shaped connector and the resilient wall is preferably configured to result in a breakaway force of around 25 to 30N.
  • the resilient wall may be configured to permit angular movement of the ball-shaped connector so that the first and second parts are articulated.
  • the first part need only be slightly larger in size than a ball of the ball chain so as to encapsulate an end ball.
  • the ball-shaped connector of the first part extends into the second part.
  • the second part need only be large enough to encapsulate the ball-shaped connector at one end and an end ball at an opposite end.
  • the second part narrows at a mid portion along the elongate extent so as to mimic the overall shape of two adjacent balls of the ball chain.
  • the end having a resilient wall for holding the ball-shaped connector may articulate with respect to the end having the second cavity for an end ball of the ball chain.
  • a flexible/resilient connecting portion may be provided between the two ends.
  • the ball-shaped connector, the first cavity and the second cavity may be provided as substantially the same size.
  • the ball-shaped connector may be provided as substantially the same size as the balls of a ball chain with which the connector is to be used.
  • FIG. 1 An example of an architectural covering using a ball chain with a ball chain connector embodying the present invention is shown in Figure 1 .
  • This example of an architectural covering 10 includes a head rail 12 supporting a roller 14 from which a sheet fabric 16 may be extended or retracted.
  • a bottom rail 18 is provided at a lower edge of the sheet fabric 16.
  • a mechanism is provided in a housing 14a at one end for rotating the roller 14 so as to extend or retract the sheet fabric 16. In the illustrated embodiment, this mechanism is operated by a ball chain.
  • the ball chain 20 includes a plurality of balls 22 arranged in a known manner as an array along a flexible member 24.
  • a single flexible member 24 may be provided or a plurality of individual respective flexible members. Irrespective, each pair of adjacent balls 22 may be considered as being connected together by a flexible member section 26.
  • FIG. 1 An embodiment of the present invention is illustrated in Figure 1 as ball chain connector 30 having a first part 32 releasably connected to a second part 34.
  • the first part 32 holds within a respective cavity an end ball 22a of the ball chain 20.
  • the second part 34 holds within a respective cavity an end ball 22b of the ball chain 20.
  • the ball chain connector 30 thus connects together the two ends of the ball chain 20.
  • the ball chain 20 is subjected to a sufficient load such that the first 32 and second 34 parts of the ball chain connector 30 are pulled apart with a sufficient force, the two parts 32, 34 separate from one another.
  • Figure 2 illustrates an embodiment of a ball chain connector in greater detail.
  • the first part 32 of the ball chain connector takes the form of a housing having a side wall defining a cavity 36 for receiving an end ball 22a of the ball chain.
  • the second part 34 of the ball chain connector takes the form of a housing having a side wall defining a cavity 38 for receiving an end ball 22b of a ball chain.
  • the housings formed by the first and second parts 32, 34 have respective elongate lengths. At one end of the elongate length of the first part 32, there is a through hole 40. As illustrated, the flexible member section 26 joining the end ball 22a to the adjacent ball 22 extends through the through hole 40. Similarly, the second part 34 defines a through hole 42. The flexible member section 26 adjoining the end ball 22b to the adjacent ball 22 extends through the through hole 42.
  • the first part 32 is secured to an end of the ball chain 20 and the second part 34 is secured to the opposite end of the ball chain 20.
  • the end balls 22a, 22b are held within the respective cavities 36, 38 and cannot pass through the through holes 40, 42 which allow passage of the flexible member sections 26, but are too small to allow passage of the end balls 22a, 22b.
  • first part 32 is shown in greater detail in the end view of Figure 3(a) and side view of Figure 3(b) .
  • the features of the second part are shown in greater detail in the end view of Figure 4(a) and the side view of Figure 4(b) .
  • the end balls 22a, 22b are secured within the respective first and second part 32, 34.
  • the first and second parts 32, 34 directly around the end balls 22a, 22b, for example with insert moulding.
  • the side wall of the first part 32 extending along its length defines an opening 44 through which the end ball 22a can be inserted during fitting.
  • the side wall of the second part 34 defines an opening 46 through which the end ball 22b can be inserted during fitting.
  • Slots 48, 50 shown best in Figures 3(a) and 4(a) are provided between the respective openings 44, 46 and through holes 40, 42.
  • an end ball 22a, 22b is pushed past the side walls through the respective openings 44, 46 and into the respective cavities 36, 38.
  • the end balls 22a, 22b can then be rotated with their respective flexible member sections 26 passing through the respective slots 48, 50 until they are positioned such that the respective flexible member sections 26 extend through and from the respective through holes 40, 42.
  • the first part 32 is additionally provided with a ball-shaped connector 60.
  • a stem 62 extends from an end, opposite the through hole 40, of the elongate extent of the housing formed by the first part 32.
  • the ball-shaped connector 60 is provided at a distal end of this stem 62.
  • the ball-shaped connector may be substantially spherical and may be of a size similar to the balls 22 of the ball chain if not of a size substantially the same as those balls 22.
  • resilient wall 64 defines a connection aperture 66 and a cavity 68 within the second part 34.
  • the ball-shaped connector 60 is located within the cavity 68 defined by the resilient wall 64 and behind (i.e. on the inner side of) the connection aperture 66. That is to say at least the greater part of the ball-shaped connector, i.e. its greatest diameter, is behind the connection aperture 66. In this way, the ball-shaped connector 60 is connected to the second part 34 and, as a result first and second parts 32, 34 are connected together.
  • the wall 64 holding the ball-shaped connector 60 is resilient and can be deflected outwardly. As a result, if a sufficient force is provided pulling the first and second parts 32, 34 away from each other, the ball-shaped connector 60 moves outwardly from the cavity 68 and second part 34, deflecting the resilient wall 64 until it becomes separated from the second part 34.
  • the first part 32 is able to articulate relative to the second part 34 and retain the overall flexibility of the ball chain 20. Also, by providing a tapered nature to the ball-shaped connector 60, it is able to separate progressively the wall 64 when the first and second parts 32, 34 are pulled apart from one another.
  • Embodiments are possible where the ball-shaped connector 60 is fitted to the second part 34 merely by pushing the ball-shaped connector 60 through the connection aperture 66 into the cavity 68.
  • the wall 64 may be provided with one or more divisions allowing it to separate when being deflected apart. Alternatively, if the wall 64 is appropriately flexible, it may merely elastically deform to allow the ball-shaped connector 60 to be inserted or withdrawn.
  • the wall 64 as part of the side wall of the housing formed by the second part 34 also defines a side opening 70 allowing the ball-shaped connector 60 to be inserted into the cavity 68 through the side of the second part 34.
  • the side opening 70 may be formed with resilient wall portions and have a size slightly smaller than the ball-shaped connector 60 so that the ball-shaped connector 60 may be pushed or snapped fitted into the cavity 68.
  • the size of the side opening 70 is greater than the size of the connection aperture 66 such that it is easier for a user to fit the ball connector 60 into the second part 34 using the side opening 70 than to pull the ball-shaped connector 60 out of the cavity 68 through the connection aperture 66.
  • a side slot 72 is defined extending from the side opening 70 to the connection aperture 66.
  • the first part 32 may be fitted to the second part 34 by inserting the ball-shaped connector 60 through the side opening 70 with the stem 62 already extending in the longitudinal direction of the second part 34, or by inserting the ball-shaped connector 60 through the side opening 70 and then rotating the ball-shaped connector 60 within the cavity 68 such that the stem 62 or at least a reduced diameter portion of the ball-shaped connector 60 passes through the side slot 72 until the stem 62 and first part 32 extend in the longitudinal direction of the second part 34.
  • the ball-shaped connector 60 may be provided with a protrusion 74.
  • This protrusion 74 may extend into the side opening 70, in assembled condition, as shown in Figure 5(b) .
  • the protrusion 74 is designed to cooperate with the side opening 70 to limit or prevent rotation of the ball-shaped connector 60 around the longitudinal axis of the ball chain connector 30.
  • the protrusion 74 may further be designed to limit or prevent rotation of the ball-shaped connector 60 around one or both of the other two axes, extending orthogonally to the longitudinal axis.
  • the protrusion 74 may be designed to allow at least some rotation around said other two axes, so that the first and second parts 32, 34 remain articulated in those directions to at least some extent.
  • release of the parts 32, 34 may occur in an even more reproducible, reliable manner, at an accurately predetermined release force.
  • the first part 32 may be connected to the second part 34 in a similar way as described before, that is, the ball shaped connector 60 may be fitted into the second part 34 merely by pushing the ball-shaped connector 60 through the connection aperture 66 into the cavity 68.
  • the wall 64 may be provided with one or more divisions allowing it to separate when being deflected apart. Alternatively, if the wall 64 is appropriately flexible, it may merely elastically deform to allow the ball-shaped connector 60 to be inserted or withdrawn.
  • the ball-shaped connector 60 may be fitted into the second part 34 by pushing the ball-shaped connector 60 through the side opening 70 with the stem 62 already extending in the longitudinal direction of the second part 34.
  • the ball-shaped connector 60 may be inserted through the side opening 70 and subsequently be rotated within the cavity 68 so that the stem 62 passes through the side slot 72 until the stem 62 and first part 32 extend in the longitudinal direction of the second part 34.
  • the ball-shaped connector 60 and wall 64 should be sized appropriately so as to allow separation at a well defined predetermined force, such as 25N. Because the ball chain connector is being manufactured specifically for this purpose, appropriate tolerances of manufacture can be used to achieve a well defined break apart force.
  • the housing formed by the first part 32 need not be significantly larger than a ball of the ball chain.
  • the second part must include a housing for a ball of the ball chain as well as a housing for the ball-shaped connector 60.
  • Alternative embodiments could provide a narrowing of the outer size and shape of the second part 34 between the cavities 38 and 68 such that the overall shape and form of the second part 34 mimics two adjacent balls 22.
  • embodiments are possible where the join between those two housings is articulated, for example using a flexible interconnecting member, allowing the second part 34 to behave like two adjacent balls of the ball chain.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Blinds (AREA)
  • Hooks, Suction Cups, And Attachment By Adhesive Means (AREA)
  • Adornments (AREA)
EP14004357.1A 2013-12-24 2014-12-22 Ball chain connector and method of releasably connecting together ball chain ends Active EP2889448B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL14004357T PL2889448T3 (pl) 2013-12-24 2014-12-22 Złącze łańcucha kulkowego i sposób rozłączalnego łączenia ze sobą końców łańcucha kulkowego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1040576A NL1040576C2 (en) 2013-12-24 2013-12-24 Ball chain connector and method of releasably connecting together ball chain ends.

Publications (2)

Publication Number Publication Date
EP2889448A1 EP2889448A1 (en) 2015-07-01
EP2889448B1 true EP2889448B1 (en) 2017-10-04

Family

ID=52344909

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14004357.1A Active EP2889448B1 (en) 2013-12-24 2014-12-22 Ball chain connector and method of releasably connecting together ball chain ends

Country Status (6)

Country Link
EP (1) EP2889448B1 (no)
AU (1) AU2014280899B2 (no)
DK (1) DK2889448T3 (no)
NL (1) NL1040576C2 (no)
NO (1) NO2889448T3 (no)
PL (1) PL2889448T3 (no)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11306534B2 (en) 2019-02-06 2022-04-19 Hunter Douglas Inc. Connector for a looped operating element of an architectural-structure covering

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5481121B2 (ja) 2009-07-24 2014-04-23 立川ブラインド工業株式会社 コードのコネクタ
GB2479523A (en) 2010-03-30 2011-10-19 New House Textiles Ltd Pull cord assembly
CA2708468A1 (en) 2010-06-25 2011-12-25 Nien Made Enterprise Co., Ltd. Safety device for window shades
US8365362B2 (en) * 2010-12-30 2013-02-05 Tser Wen Chou Safety release device for Roman blind pull cord
KR101252028B1 (ko) 2012-10-24 2013-04-10 유상원 롤스크린 또는 블라인드의 가동줄 안전연결고리

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11306534B2 (en) 2019-02-06 2022-04-19 Hunter Douglas Inc. Connector for a looped operating element of an architectural-structure covering

Also Published As

Publication number Publication date
DK2889448T3 (da) 2017-11-13
AU2014280899A1 (en) 2015-07-09
NL1040576C2 (en) 2015-06-29
NO2889448T3 (no) 2018-03-03
AU2014280899B2 (en) 2018-05-17
PL2889448T3 (pl) 2018-04-30
EP2889448A1 (en) 2015-07-01

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