WO2015001353A1 - Poussette - Google Patents

Poussette Download PDF

Info

Publication number
WO2015001353A1
WO2015001353A1 PCT/GB2014/052039 GB2014052039W WO2015001353A1 WO 2015001353 A1 WO2015001353 A1 WO 2015001353A1 GB 2014052039 W GB2014052039 W GB 2014052039W WO 2015001353 A1 WO2015001353 A1 WO 2015001353A1
Authority
WO
WIPO (PCT)
Prior art keywords
tubular member
pushchair
tubular
engagement
frame according
Prior art date
Application number
PCT/GB2014/052039
Other languages
English (en)
Inventor
James Gladstone
Milad ARKIAN
Jonathan Harris
Original Assignee
The University Of Manchester
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 The University Of Manchester filed Critical The University Of Manchester
Publication of WO2015001353A1 publication Critical patent/WO2015001353A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B7/00—Carriages for children; Perambulators, e.g. dolls' perambulators
    • B62B7/04—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
    • B62B7/06—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable
    • B62B7/062—Coupling unit between front wheels, rear wheels and handle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B7/00—Carriages for children; Perambulators, e.g. dolls' perambulators
    • B62B7/04—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
    • B62B7/06—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable
    • B62B7/064—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable the handle bar being parallel to the front leg
    • B62B7/066—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable the handle bar being parallel to the front leg the handle bar moves in parallel relation during folding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B7/00—Carriages for children; Perambulators, e.g. dolls' perambulators
    • B62B7/04—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor
    • B62B7/06—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable
    • B62B7/08—Carriages for children; Perambulators, e.g. dolls' perambulators having more than one wheel axis; Steering devices therefor collapsible or foldable in the direction of, or at right angles to, the wheel axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2205/00—Hand-propelled vehicles or sledges being foldable or dismountable when not in use
    • B62B2205/18—Geared articulations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B2501/00—Manufacturing; Constructional features
    • B62B2501/02—Dimensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
    • B62B9/00—Accessories or details specially adapted for children's carriages or perambulators
    • B62B9/20—Handle bars; Handles

Definitions

  • This invention relates to a pushchair, and, in particular, to a pushchair comprising a collapsible frame.
  • Pushchairs may be used to easily transport people such as infants, the sick or infirm, and generally include a seat mounted to a wheeled frame.
  • the pushchair In many cases, it is preferable for the pushchair to be collapsible to a smaller configuration when not required.
  • a collapsed pushchair requires less storage space when being stored and facilitates easy handling.
  • a pushchair frame comprising:
  • At least one second tubular member where said at least one first tubular member is axially moveable relative to said at least one second tubular member
  • an engagement mechanism that rotatably engages said at least one third tubular member with said at least one first tubular member
  • said engagement mechanism includes a head member that is rotatably fixed relative to said at least one third tubular, where circumferential engagement of said head member causes rotation of said at least one third tubular member relative to said at least one first tubular member;
  • Said engagement mechanism may further include an intermediate rotatable member, wherein said intermediate rotatable member is circumferentially engageable by said at least one first tubular member, and said head member is circumferentially engageable by said intermediate rotatable member, such that axial movement of said at least one first tubular member relative to said at least one second tubular member causes rotation of said intermediate rotatable member, and rotation of said intermediate rotatable member causes rotation of said head member and said third tubular.
  • Circumferential engagement of said head member may be direct frictional engagement by said at least one first tubular member.
  • Said head member may form a pinion and said at least one first tubular member includes a rack portion, and wherein said circumferential engagement of said head member is engagement of said pinion by said rack portion.
  • Said circumferential engagement of said head member may be direct frictional engagement by said intermediate rotatable member, and said circumferential engagement of said intermediate rotatable member may be direct frictional engagement by said at least one first tubular member.
  • Said head member may form a first pinion
  • said intermediate rotatable member may form a second pinion
  • said at least one first tubular member may include a rack portion
  • said circumferential engagement of said head member may be engagement of said first pinion by said intermediate rotatable member
  • said circumferential engagement of said intermediate rotatable member may be engagement of said second pinion by said rack portion
  • Said at least one first tubular member may be telescopically slidable in said at least one second tubular member.
  • Said at least one second tubular member may include a window and said at least one first tubular member is exposed through said window.
  • Said at least one first tubular member may circumferentially engage said head member through said window.
  • Said at least one first tubular member may circumferentially engage said intermediate rotatable member through said window.
  • the pushchair frame may further comprise one or more further tubular members, wherein said one or more further tubular members are telescopically slidable relative to said at least one first tubular member.
  • the pushchair frame may further comprise a sleeve surrounding at least part of said at least one first tubular member and said at least one second tubular member so as to cover any gap between said at least one first tubular member and said at least one second tubular member.
  • the pushchair frame may further comprise a limiting member that is attached at a first end to said at least one third tubular member and at a second end to said at least one second tubular member, and said limiting member acts to limit the maximum rotational position of said at least one third tubular member relative to said at least one second tubular member.
  • a pushchair comprising:
  • a seat supported on said pushchair frame and configured for receiving a person.
  • Figure 1 shows pushchair in accordance with an embodiment of the present invention
  • Figure 2 shows the pushchair of Figure 1 with the seat and footrest omitted;
  • Figure 3 shows a detailed view of an engagement mechanism forming part of the pushchair of Figures 1 and 2;
  • Figure 4 shows a detailed view of the engagement mechanism of Figure 3 with part of a housing of the engagement mechanism omitted for clarity;
  • Figures 5A to 5D show the various possible configurations of a pushchair in accordance with an embodiment of the present invention, where Figure 5A shows the pushchair in a fully opened configuration, Figure 5D shows the pushchair in a fully collapsed configuration, and Figures 5B and 5C show the pushchair in intermediate configurations between the fully opened and fully collapsed configurations.
  • FIG. 1 shows a pushchair 10 in accordance with an embodiment of the present invention.
  • the pushchair 10 includes a frame 12 and four ground engaging wheels 14 rotatably mounted to the frame 12 for supporting the pushchair on the ground and permitting mobility of the pushchair.
  • any suitable number of ground engaging wheels 14 may be present provided that the frame 12 is adequately supported on the ground and adequate mobility is permitted.
  • the frame 12 supports a seat 16 that is configured for receiving a person.
  • the seat 16 may be configured for receiving infants, however, in alternative embodiments, the seat 16 may be configured for receiving non-infants such as adults.
  • the frame 12 additionally supports a foot rest 34 that may provide a comfortable resting place for the feet of a person sat in the seat 16. Additionally, the foot rest 34 may prohibit the feet of a person sat in the seat 16 from interfering with the ground engaging wheels 14 thereby reducing the risk of injury.
  • Figure 2 shows the pushchair of Figure 1 with the seat 16 and footrest 34 omitted to aid the reader's understanding of the frame 12.
  • the frame 12 includes a pair of first tubular members 18 that are each telescopically slidable relative to a second tubular member 20.
  • the frame 12 further includes a pair of third tubular members 22 that are each rotatably engaged to one of the first tubular members 18 by an engagement mechanism 24.
  • a rear two of the ground engaging wheels 14 are rotatably mounted to the pair of third tubular members 22 at the rear of the frame 12, and a front two of the ground engaging wheels 14 are rotatably mounted to a front part of the frame 12 that is forward of the rear ground engaging wheels 14.
  • each first tubular member 18 Extending from each first tubular member 18 is a fourth tubular member 26 and a fifth tubular member 28 where each fifth tubular member is telescopically slidable in the respective fourth tubular member 26, which, in turn, is telescopically slidable in the respective first tubular member 18.
  • a first crossing member 30 extends orthogonally to the pair of fifth tubular members 28 to link the pair of fifth tubular members 28. The first crossing member 30 forms a handle that may be used to push the pushchair 10 along the ground.
  • a plurality of second crossing members 32 extend orthogonally to the pair of second tubular members 20 to link the pair of second tubular members 20. The second crossing members 32 may provide support for the foot rest in addition to providing structural rigidity to the frame 12.
  • a third crossing member 36 extends orthogonally to the pair of third tubular members 22 and adds structural rigidity and stability to the frame 12.
  • FIGS 3 and 4 show detailed views of the engagement mechanisms 24 where Figure 4 shows a cut away view to aid clarity of understanding. Given that both engagement mechanisms 24 are identical to one another, the following description is in reference to a single one of the engagement mechanisms 24.
  • the engagement mechanism 24 includes a housing 42 connected to the second tubular member 20 having an intermediate rotatable member 38 rotatably mounted thereto. Additionally, the engagement mechanism includes a head member 40 that is rotatably mounted to the housing 42 and is rotatably fixed relative to said third tubular member 22 such that the head member 40 cannot rotate relative to the third tubular member 22 but the head member 40 and third tubular member 22 can rotate collectively relative to housing 42.
  • the head member 40 is a curved member in the form of a wheel.
  • the second tubular member has a window (not shown in Figures 3 and 4) through which the intermediate rotatable member 38 extends through to contact the first tubular member 18.
  • the intermediate rotatable member 38 is circumferentially engageable such that it may be caused to rotate by engagement with its circumference.
  • the head member 40 is circumferentially engageable such that it may be caused to rotate by engagement with its circumference.
  • the circumference relates to the outer curved surface/part of the head member 40 and intermediate rotatable member 38.
  • Circumferential engagement in accordance with the present invention is therefore engagement with the outer surface of the head member 40 or intermediate rotatable member 38 that results in rotation of the head member 40 or intermediate rotatable member 38.
  • the act of axially sliding the first tubular members 18 relative to the second tubular members 20 causes the third tubular members 22 to rotate towards positions where the third tubular members 22 are substantially parallel to the first tubular members 18 and second tubular members 20.
  • the present invention therefore provides an effective mechanism for collapsing pushchair frame 12 where an axial collapsing action causes a simultaneous rotational collapsing action and hence reduces the complexity of collapsing the pushchair frame 12.
  • Figures 5A to 5D show various configurations of the pushchair frame 12, where Figure 5A shows the pushchair frame 12 in a fully opened configuration, Figure 5D shows the pushchair frame 12 in a fully collapsed configuration, and Figures 5B and 5C show the pushchair frame 12 in intermediate configurations between the fully opened and fully collapsed configurations.
  • this movement of the first tubular members 18 relative to the second tubular members 20 causes the third tubular members 22 to rotate along line R3 towards the second tubular members 20 to a final collapsed configuration as shown in Figure 5D in which the third tubular members 22 are substantially parallel to the first tubular members 18 and the second tubular members 20.
  • the intermediate rotatable member 38 and the head member 40 are each circumferentially engageable by friction acting on each respective circumference.
  • each of the intermediate rotatable member 38 and the head member 40 forms a pinion that may be circumferentially engaged by a complementary toothed formation such as a further pinion or a rack.
  • the first tubular members 18 may include a toothed rack portion that circumferentially engages the intermediate rotatable member 38 which in turn circumferentially engages the head member 40.
  • first tubular members 18 may include a toothed rack portion that directly circumferentially engages the head member 40.
  • any mechanical circumferential engagement with the intermediate rotatable member 38 and/or the head member 40 by axial movement of the first tubular member 18 relative to the second tubular member 20 may cause rotation of the third tubular member 22 relative to the first tubular member 18.
  • the intermediate rotatable member 38 serves to provide a reversed rotational force on the head member compared with the rotational force that would be experienced by the head member 40 if it was directly circumferentially engaged by the first tubular member 38 (i.e. with no intermediate rotatable member 38).
  • the head member may be circumferentially engaged directly by the first tubular member 18 without the intermediate rotatable member being present.
  • one or each of the intermediate rotatable member 38 and the head member 40 may not have an outer surface that extends about 360°.
  • the circumference of the intermediate rotatable member 38 and the head member 40 would be the outer curved surface and this outer curved surface is circumferentially engageable.
  • the intermediate rotatable member and/or head member forms a pinion, it may be a geared wheel whose outer surface extends along an arc less than 360°, and may, for example, extend along an arc of 90° (i.e. be a 1 ⁇ 4 gear wheel).
  • first tubular members 18 may be telescopically slidable in the second tubular members 20, in alternative embodiments, the first tubular members 18 may move axially relative to the second tubular members 20 alongside the second tubular members 20.
  • only some of the third tubular elements 22 may be rotatably engaged with the first tubular elements 18.
  • a pushchair that is identical to the pushchair 10 shown in Figure 1 except comprising only a single engagement mechanism 24.
  • circumferential engagement causes the rotation of one of the third tubular members 22 (i.e. the third tubular member 22 connected by the engagement mechanism 24) as one of the first tubular members 18 is axially moved relative to the second tubular member 20.
  • the other of the two third tubular members 22 rotates passively due to its connection with the engaged third tubular member 22 via third crossing member 36.
  • This passive third tubular member 22 is still rotationally mounted to the second tubular member 20, however such rotational mounting would not include any mechanisms involving circumferential engagement. More, generally, in alternative embodiments of the present invention, there may be any number of passive rotational connections between third tubular members 22 and second tubular members 20 provided that at least one engagement mechanism 24 exists to provide the required circumferential engagement for causing rotation of the third tubular members 22. Passive third tubular members 22 would be connected to the engaged third tubular member 22 so that movement of the engaged third tubular member 22 causes synchronous movement of the passive third tubular members 22.
  • This appendix aims to explain the functioning of an example of a folding mechanism designed for use with pushchairs in accordance with a non-limiting embodiment of the present invention.
  • the folding mechanism can be implemented on a pushchair to give a very compact and simple fold.
  • the mechanism gives a very user friendly fold; in that it can be operated entirely by one hand.
  • the design relies on a rack and pinion system to retract the rear legs when the upper handle is collapsed.
  • This rack and pinion is created by having a gear meshed to a rack on the first inner tube (tube 1 - in Figure A1 ) of a telescopic tube arrangement. Due to being meshed; when the telescopic tube is lengthened or shortened, and tube 1 moves linearly relative to the wheel, it causes the gear to rotate.
  • This gear is mounted to the outside of tube (5) by a bracket system and allowed to freely rotate on an axle in parallel to the ground and normal to the direction of the down tube. The gear is in contact with the first inner tube (1 ) through a port which is cut into tube (5).
  • the size of the two gear wheels has an effect on the fold of the pushchair: A smaller first wheel paired with a larger second wheel will mean the user must apply less force to open the pushchair and the travel of the telescopic tubes will be greater, and vice versa.
  • the rack and pinion mechanism is simply connected to tube 5 by a set of clamps and brackets. This arrangement is designed to be as slim as possible to allow room for the child.
  • the telescopic handles click into place, as seen on many/most luggage bags, to maintain their length in both the extended and collapsed position. Having the telescopic tubes locked in this fashion in the "pushchair open” state will provide resistance to the legs splaying further.
  • a physical stop would also be created by having fabric straps connected to the down tube and rear legs. In the open position the straps would be taught and not allow the mechanism to open further.
  • the telescopic tubes combined with the mechanism allows the folded length of the pushchair to be roughly one-third the length of the unfolded down tube length. This would allow a typically sized, A-Frame, pushchair to have a folded length of 60cm.
  • a shelf is milled into the profile of tube 1 (as shown in Figure A2), in this a geared rack made from a suitable material is inlayed and bonded (as shown in Figure A3). It is not necessary that an inlay be used if all of tube 1 can be manufactured from a suitable material - and a geared rack machined into its profile.
  • Figures a6 to A8 show various stages of the folding process with geared wheels. Additionally, Figure A6 shows an embodiment including a strap that prevents the legs from opening further than desired during use.
  • the design could also have a rack cut along the vertical wall of tube 1 as
  • the user lifts the pushchair from the rear handles so that all the weight of the pushchair rests on the front most cross member. At this point the front and rear wheels are lifted off the ground.
  • the button for the telescopic tubes is depressed, and the handle rotated, which releases the telescopic mechanism and allows the tubes to collapse. A small amount of force is applied to the handle, towards the direction of the ground, with one hand which collapses the telescopic tubes and folds the rear legs into position.
  • the telescopic mechanism locates to the final hole and locks the mechanism in place.
  • the telescopic button is depressed and small force is applied upwards on the handle, with one hand.
  • the telescopic tubes locate into the extended holes and locks the mechanism in place.
  • the final position is fortified by the afore mentioned straps between down tube and rear legs.
  • Finger entrapment and skin impingement are other considerations which must be met to comply with the British standard.
  • the gaps in the telescopic tubes are thought to be too small to allow skin impingement as they are seen on many pushchairs currently on the market.
  • the pushchair can maintain a reclined angle of 48.84° (as shown in Figure A16) which is within the British Standards criteria of 45°.
  • This prototype pushchair uses smooth wheels, as opposed to geared wheels in the mechanism; however the fold remains the same.
  • Figure A18 includes 5 photographs where:
  • Figure A19 includes 5 photographs where:

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Handcart (AREA)

Abstract

La présente invention concerne un châssis de poussette comportant au moins un premier élément de forme tubulaire (18), et au moins un second élément de forme tubulaire (20), ledit au moins premier élément de forme tubulaire (18) étant axialement mobile par rapport au dit au moins un second élément de forme tubulaire (20). Le châssis de poussette comporte également au moins un troisième élément de forme tubulaire (22), et un mécanisme d'enclenchement (24) qui enclenche de manière rotative ledit au moins un troisième élément de forme tubulaire (22) avec ledit au moins un premier élément de forme tubulaire (18). Ledit mécanisme d'enclenchement (24) comporte un élément de tête (40) qui est fixé de manière rotative par rapport au dit au moins un troisième élément de forme tubulaire (22), l'enclenchement circonférentiel dudit élément de tête (40) entraînant la rotation dudit au moins un troisième élément de forme tubulaire (22) par rapport au dit au moins un premier élément de forme tubulaire (18). Le déplacement axial dudit au moins un premier élément de forme tubulaire (18) par rapport au dit au moins un second élément de forme tubulaire (20) entraîne l'enclenchement circonférentiel dudit élément de tête (40).
PCT/GB2014/052039 2013-07-05 2014-07-04 Poussette WO2015001353A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1312097.7A GB201312097D0 (en) 2013-07-05 2013-07-05 Improved pushchair
GB1312097.7 2013-07-05

Publications (1)

Publication Number Publication Date
WO2015001353A1 true WO2015001353A1 (fr) 2015-01-08

Family

ID=49033391

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2014/052039 WO2015001353A1 (fr) 2013-07-05 2014-07-04 Poussette

Country Status (2)

Country Link
GB (1) GB201312097D0 (fr)
WO (1) WO2015001353A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024049954A1 (fr) * 2022-09-01 2024-03-07 Jablonski Krzysztof Michal Cadre pliant roulant doté d'une poignée et d'un empattement déployables simultanément

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7077420B1 (en) * 2005-02-04 2006-07-18 American Recreation Products, Inc. Foldable three-wheeled jogging stroller
EP2243683A1 (fr) * 2009-04-20 2010-10-27 NPK Design BV Poussette ou buggy
KR20110114133A (ko) * 2010-04-13 2011-10-19 주식회사 오스템 리클라이너를 구비한 유모차
CN202557583U (zh) * 2012-02-29 2012-11-28 好孩子儿童用品有限公司 儿童推车的篷头自动开合机构

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7077420B1 (en) * 2005-02-04 2006-07-18 American Recreation Products, Inc. Foldable three-wheeled jogging stroller
EP2243683A1 (fr) * 2009-04-20 2010-10-27 NPK Design BV Poussette ou buggy
KR20110114133A (ko) * 2010-04-13 2011-10-19 주식회사 오스템 리클라이너를 구비한 유모차
CN202557583U (zh) * 2012-02-29 2012-11-28 好孩子儿童用品有限公司 儿童推车的篷头自动开合机构

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024049954A1 (fr) * 2022-09-01 2024-03-07 Jablonski Krzysztof Michal Cadre pliant roulant doté d'une poignée et d'un empattement déployables simultanément

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Publication number Publication date
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