EP3452000A1 - Collapsible mobility aid - Google Patents
Collapsible mobility aidInfo
- Publication number
- EP3452000A1 EP3452000A1 EP17719593.0A EP17719593A EP3452000A1 EP 3452000 A1 EP3452000 A1 EP 3452000A1 EP 17719593 A EP17719593 A EP 17719593A EP 3452000 A1 EP3452000 A1 EP 3452000A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- folding mechanism
- mobility aid
- connecting arms
- aid according
- foldable
- 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
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000399 orthopedic effect Effects 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
- A61G5/0808—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction
- A61G5/0816—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction folding side to side, e.g. reducing or expanding the overall width of the wheelchair
- A61G5/0825—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction folding side to side, e.g. reducing or expanding the overall width of the wheelchair comprising a scissor-type frame, e.g. having pivoting cross bars for enabling folding
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
- A61G5/0808—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction
- A61G5/0816—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable characterised by a particular folding direction folding side to side, e.g. reducing or expanding the overall width of the wheelchair
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
- A61G5/00—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs
- A61G5/08—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable
- A61G5/0883—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs foldable having locking means for maintaining a folded or unfolded condition
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61H—PHYSICAL THERAPY APPARATUS, e.g. DEVICES FOR LOCATING OR STIMULATING REFLEX POINTS IN THE BODY; ARTIFICIAL RESPIRATION; MASSAGE; BATHING DEVICES FOR SPECIAL THERAPEUTIC OR HYGIENIC PURPOSES OR SPECIFIC PARTS OF THE BODY
- A61H3/00—Appliances for aiding patients or disabled persons to walk about
- A61H3/04—Wheeled walking aids for patients or disabled persons
Definitions
- the invention relates to a foldable mobility aid with two frame members, to each of which at least one wheel is attached or fastened, and a folding mechanism through which the frame members are interconnected and a distance between the frame members in a first position of the folding mechanism at a transport distance in a second position of the folding mechanism is adjustable to a use distance, wherein the folding mechanism comprises a central element with a slider movably arranged thereto, at least two connecting arms which are each hinged to a frame member and to the central element, and at least two levers, each at a connecting arm and the slider are arranged.
- Mobility aids in the context of the present invention are orthopedic devices for persons with reduced mobility.
- Mobility aids may be, for example, wheelchairs, walking aids or roilators, or strollers or other mobility-enhancing devices and devices.
- Such devices and in particular foldable wheelchairs have long been known from the prior art.
- US Pat. No. 8,419,047 B2 and WO 2015/034372 A1 each show such a foldable wheelchair.
- the aim of the folding mechanism is to be able to reduce the distance between the two frame elements for transporting the wheelchair. In this way, the wheelchair can be stowed to save space for transport.
- a generic wheelchair is known for example from US 2015/0245963 A1. While the first two documents have as folding mechanism only in pairs attached to the two frame members connecting arms, between each of which a simple hinge with a stop is present, the latter application has a folding mechanism described in the preamble of claim 1.
- the advantage lies in the two levers, which are arranged between each one connecting arm and the slide of the central element. In this way it is ensured that when folding the foldable wheelchair, so when transferring the folding mechanism of the second Guaranteed position in the first position, that the folding or in the reverse process, the unfolding of the folding mechanism on both sides, ie to both frame elements, equally fast and thus homogeneous.
- a foldable mobility aid carries the risk that the mobility aid may also be unintentionally collapsed, for example accidentally, although this is not intended.
- a force is exerted on the two frame elements which are connected to this cover or pad, which is directed in the direction of the respective other frame element and thus could lead to bring the folding mechanism from the second position to the first position, although this is not desired in this situation.
- US 2015/0245963 A1 this problem is solved in that the folding mechanism is moved away a little beyond the dead center of the folding mechanism when transferring the folding mechanism from the first position to the second position, that is to say when unfolding the folding mechanism.
- US Pat. No. 6,572,133 B1 describes another embodiment of a folding mechanism which, in the completely unfolding state, that is to say in the second position of the folding mechanism, is far away from the dead center of the arrangement.
- the respective connecting arms of the folding mechanism thus do not extend exactly or nearly perpendicular to the longitudinal extent of the central element in the completely unfolded state, but have a clear angle, which in the abovementioned document ment can be between 40 ° and 45 °.
- various connecting arms are present, which have a corresponding angle in different directions, as is known from a scissors mechanism.
- a pressure on the two frame elements would consequently lead to push this folding mechanism together, wherein the connecting arms, which are tilted, for example, in the direction of travel of the wheelchair to the rear, are arranged on the slider of the central element, while the connecting arms, in the direction of travel of the wheelchair to the front are arranged pivoted, are posi-tioned on the central element itself.
- a folding of the folding mechanism by pressure on the frame elements would thus result in that the slider is moved relative to the central element.
- these two components are locked against each other in the fully unfolded position of the folding mechanism, so the second position, such a guide is not possible.
- the embodiment shown has the disadvantage that a large number of connection arms is needed and also the folding mechanism is expensive and therefore expensive.
- the invention is therefore based on the object to develop a generic foldable mobility aid according to the preamble of claim 1 so that a rattle and a sense of uncertainty is safely avoided, the folding mechanism is simple and therefore inexpensive to produce and at the same time achieves the lowest possible transport distance becomes.
- the invention solves this problem by a foldable mobility aid according to the preamble of claim 1, which is characterized in that the pivot axes about which the lever is pivotally mounted on the connecting arms and on the slider, are in a plane when the Folding mechanism is in the second position.
- Folding mechanism is the maximum possible distance between the two frame elements, which can be achieved with the respective folding mechanism. By pivoting the folding mechanism beyond the dead center, as is known from the prior art, it is achieved that the distance between the two frame elements decreases again when the dead center is exceeded from its maximum value. This leads to a game in the system, which can lead to rattling and the feeling of insecurity and the inferior quality of mobility assistance. This is reliably avoided by the arrangement according to the invention.
- the pivot axes about which the connecting arms are pivotally mounted on the frame members and on the central member are also in a plane when the folding mechanism is in the second position. Due to the fact that the connecting arms are also in their dead position or at their dead center, the self-locking of the folding mechanism of the foldable mobility aid is intensified. It is of course not necessary that the plane in which the pivot axes are, about which the connecting arms are pivotable, the same plane as the arms in which the pivot axes are, about which the levers are pivotable. This is usually not achievable and also not necessary for the functioning of the foldable mobility aid.
- the folding mechanism is biased in the direction of the first position, in particular spring-loaded by a spring element.
- a spring element In this way it is ensured that even in the event that the dead center of the respective pivoting movement of the lever and / or the connecting arms is not fully achieved, it is reliably avoided that the folding mechanism is accidentally folded.
- the strength of the applied biasing force for example, on the strength of the spring used, it can be adjusted how much force _
- the spring element is arranged so that it is tensioned when the folding mechanism is brought from the second position to the first position. This therefore happens when folding the folding mechanism and the foldable mobility aid.
- the energy thus stored in the spring can be used, for example, in the subsequent unfolding of the folding mechanism and the foldable, for example by a lock is released.
- the folding mechanism in the first position can be locked by a lock.
- the lock may be formed by a locking element, for example a locking element, which automatically locks in the locking position as soon as the first position of the folding mechanism is reached.
- a locking element can be automatically actuated, which engages in a recess provided for this purpose or a latching intersection.
- other locking elements are conceivable that lock automatically.
- the lock is manually operated as soon as the folding mechanism is in the first position.
- This may be formed by a lever, a retractable bolt or a push button to be operated.
- the folding mechanism can be brought from the first position to the second position by the locking is released. This means that it is not necessary, for example, to apply a force to the frame elements in order to pull them apart.
- the necessary force in this case is preferably provided by the energy stored in the spring element.
- the folding mechanism is locked in the first position and self-locked, for example, by the levers are in a dead center position.
- it may be useful to provide a transport lock or fuse by the accidental deployment of the mobility aid is prevented, which would happen if the folding mechanism would be accidentally brought from this dead center.
- a fuse may, for example, in a security tape that is attached, for example by means of Velcro or snaps on frame elements of the mobility aid exist.
- At least one of the connecting arms but preferably on all connecting arms, a stop at the outer end of the arms.
- the frame element is applied when the folding mechanism is in the second position.
- the stop is adjustable.
- the stop element against which the respective frame element abuts when the folding mechanism is in the second position is in this case, for example, designed to be movable relative to the respective connecting arm.
- the central element has a stop against which the slider rests when the folding mechanism is in the second position. This is particularly easy to ensure that the slider is only moved so far until the folding mechanism is in the second position, and can not be moved beyond. At the same time, however, it is also ensured that the slide is displaced at least until the folding mechanism is in the second position. In this way, a faulty operation is almost impossible.
- latching elements are provided on the slide and / or on the stop, which engage in one another or in the recesses provided as soon as the slide is against the stop and the folding mechanism is in the second position. In this way, an exact positioning can be ensured in a particularly simple and secure manner.
- the slider on a handle element. At this, the required tensile or compressive force can be applied to the slider to bring the folding mechanism from the second position to the first position. If it is also necessary to apply a force for the reverse process, this can also be applied to the grip element.
- the folding mechanism has at least four connecting arms, two of which are connected to each of the frame members and the central member. It is not necessary that a lever is arranged on each of the at least four connecting arms.
- the levers ensure that the movement of the two frame elements, which are moved from the second position into the first position towards the central element when the folding mechanism is transferred, runs synchronously for both sides. This is achieved by the lever regardless of whether at each of the at least four connecting arms, such a lever is arranged. Of course, it is possible to provide corresponding lever on each of the pairs of connections.
- the pivotal movement of the connecting arms about the pivot axes takes place in different planes.
- the individual pivoting movements of the connecting arms can be identical in pairs, in particular for the connecting arms, which lie opposite one another on the central element and are connected to different frame elements.
- the pivoting movements in different levels for example, two connecting arms, which lie on the same side of the central element and are connected to the same frame member, the frame elements come to rest on each other as soon as the folding mechanism is in the first position. As a result, they do not disturb each other in the storage and it can be achieved in this way a smaller transport distance.
- FIG. 1 is a schematic three-dimensional view of part of a mobility aid
- FIGS. 2a and 2b show a schematic plan view and a schematic three-dimensional view of a folding mechanism in the fully unfolded state
- FIGS. 3a and 3b the illustrations from FIGS. 2a and 2b in the slightly folded-in state
- FIGS. 4a and 4b show the illustrations from FIGS. 2a and 2b in the strongly folded state
- FIGS. 5a and 5b show the views from FIGS. 2a and 2b in the fully folded state
- Figure 6 an enlarged section of a folding mechanism
- Figure 7 the schematic representation of a part of a mobility aid.
- FIG. 1 shows a schematic three-dimensional view of a part of a mobility aid. It can be seen two frame members 2, in which axle mounts 4 are present, in which the axes or hubs of a wheel of the mobility aid can be used. Between the two frame members 2 is a folding mechanism 6, which has a central element 8, on which a slider 10 is located. At the central element 8 there are four connecting arms 12 which are arranged on the respective frame element 2 via a respective first arm pivot axis 14 on the central element 8 and via a respective second arm pivot axis 16.
- levers 18 are fastened both to one of the connecting arms 12 and to the central element 8. They are pivotally mounted on the central element 8 in each case via a first lever pivot axis 20 and connected to the central element 8 via a respective second lever pivot axis 22. It can also be seen in Figure 1 that a total of four connecting arms 12 are present, which can be divided into two front and two rear connecting arms. In this case, the front and rear connecting arms are articulated at different "heights" on the central element 8.
- FIG. 2 a shows a schematic plan view of a folding mechanism 6, while FIG. 2 b shows the schematic 3D view of the folding mechanism 6.
- FIG. 2a and FIG. 2b show the folding mechanism in the second position, ie in the fully unfolded state.
- the distance between the two frame members 2 is maximum in the selected folding mechanism 6 and thus corresponds to the working distance.
- the first Armschwenkachsen 14 together with the second Armschwenkachsen 16 for each two opposing connecting arms 12 in a plane so in Figure 2a are on a line.
- the slider 10, which can be seen in particular in Figure 2b, is located in the most rearward pushed position, being in front of the mobility aid in Figure 2a in the left area in the direction of travel.
- Figures 3a and 3b and 4a and 4b show the illustration of Figure 2a and 2b in a light and strong folded situation.
- the slider 10 is the further the folding process progresses further to the left.
- a grip element 24 In the front region of the slider 10 there is a grip element 24 on which, for example, a tension element, for example a cord, or a cord, can be arranged.
- FIGS. 5a and 5b the folding mechanism 6 shown is shown in the completely folded-up situation, ie in the first position.
- the distance between the two frame elements 2 is minimal and thus corresponds to the transport distance.
- Figure 5b can be clearly seen that the pivotal movements of the two connecting arms 12 which are arranged on the same side of the central element 8, have played in different planes.
- the connecting arms 12 are arranged below each other. This ensures that in the first position of the folding mechanism, which is shown in Figures 5a and 5b, they are also arranged one above the other and so do not interfere with the folding. This achieves a smaller transport distance.
- FIG. 6 shows an enlarged detail of the folding mechanism. It can be seen the central element 8 with the slider 10 and the front two connecting arms 12, where the two levers 18 are located. Also, the respective first Armschwenkachsen 14 and the second lever pivot axes 22 can be seen.
- a gripping member 26 which is adapted to at least partially engage around a stop 28 when the slider 10 is located on the stop 28. In this case, the folding mechanism 6 is in the second position.
- FIG. 6 shows particularly well a spring element 30 already contained in FIG. 1, by means of which the slide 10 is prestressed in the direction of the stop 28.
- FIG. 7 shows a part of a mobility aid in a schematic representation.
- the chairelennent 2 which has a horizontal portion 30.
- a seat 32 is arranged, on which, if the mobility aid is used, the user of the mobility aid sits.
- the folding mechanism 6 is shown, in which it is easy to see that, with respect to the seat surface 32, the various connecting arms 12 are arranged at different heights, that is, at different distances from the seat surface 32.
- the connecting arms 12 clamp in this position on a connection plane 34, which is shown as a dashed line. It can be seen that this imaginary connection plane 34 intersects the seat surface 32 in the front third of the seat surface 32. This is not necessary but beneficial as it improves the stability and also the sense of security of a user of the mobility aid.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Epidemiology (AREA)
- Pain & Pain Management (AREA)
- Physical Education & Sports Medicine (AREA)
- Rehabilitation Therapy (AREA)
- Handcart (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016108150 | 2016-05-02 | ||
DE102016109759.4A DE102016109759A1 (en) | 2016-05-02 | 2016-05-26 | Foldable mobility aid |
PCT/EP2017/059913 WO2017191004A1 (en) | 2016-05-02 | 2017-04-26 | Collapsible mobility aid |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3452000A1 true EP3452000A1 (en) | 2019-03-13 |
EP3452000B1 EP3452000B1 (en) | 2023-03-22 |
Family
ID=60081587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17719593.0A Active EP3452000B1 (en) | 2016-05-02 | 2017-04-26 | Collapsible mobility aid |
Country Status (5)
Country | Link |
---|---|
US (1) | US10980686B2 (en) |
EP (1) | EP3452000B1 (en) |
CN (1) | CN109475455B (en) |
DE (1) | DE102016109759A1 (en) |
WO (1) | WO2017191004A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11364163B1 (en) * | 2021-09-28 | 2022-06-21 | Jay Foonberg | Transport chair arranged for storage in passenger aircraft carry-on luggage |
Family Cites Families (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB753894A (en) | 1953-04-07 | 1956-08-01 | Adam Wilhelm Lehr | Improvements in or relating to collapsible invalid or bath chairs |
US2896693A (en) * | 1953-04-07 | 1959-07-28 | Adam Wilhelm Lehr | Foldable invalid or bath chair |
IT1078843B (en) * | 1976-05-24 | 1985-05-08 | Perego Pines Spa | FOLDING FRAME TO SUPPORT THE CARRYCOT OF A WHEELCHAIR PRESENTING A DEVICE THAT ALLOWS IT TO STIFT IN ITS POSITION OF USE, EVEN FAVORING ITS IMMEDIATE FOLDING WHEN NECESSARY |
EP0018101B1 (en) * | 1979-04-03 | 1983-01-26 | Vessa Limited | Wheelchair and method of manufacturing it |
GB2101540A (en) | 1981-07-08 | 1983-01-19 | Vessa Ltd | Collapsible wheelchair |
GB2125740B (en) * | 1982-08-25 | 1986-07-30 | Bencraft Ltd | A collapsible wheelchair |
US4595212A (en) * | 1982-11-16 | 1986-06-17 | Invacare Corporation | Folding sports wheelchair |
DE3306336C2 (en) * | 1983-02-23 | 1985-02-21 | Heinrich Wunder GmbH & Co KG, 8060 Dachau | Holding device for the releasable holding of ski binding parts |
FR2581299B1 (en) * | 1985-05-06 | 1988-07-15 | Poirier Ets | DEVICE FOR LOCKING AND UNLOCKING A FOLDABLE ARMCHAIR, IN PARTICULAR A ARMCHAIR FOR THE DISABLED |
US4741547A (en) * | 1987-05-14 | 1988-05-03 | Tholkes Alan L | Folding wheelchair |
US5076390A (en) * | 1990-07-03 | 1991-12-31 | Haskins John T | Multiple mode wheelchair construction |
US5782483A (en) * | 1995-06-05 | 1998-07-21 | Adorno/Rogers Technology, Inc. | Adjustable wheelbase wheelchair |
US6386575B1 (en) * | 2000-08-10 | 2002-05-14 | Convaid Products, Inc. | Mobile seat arrangement |
US6572133B1 (en) | 2001-01-18 | 2003-06-03 | Sunrise Medical Hhg, Inc. | Folding mechanism for a wheelchair |
US6467788B1 (en) * | 2001-06-04 | 2002-10-22 | Tianfu Li | Tilt-in-place wheelchair having adjustable wheelbase width |
DE10133340A1 (en) | 2001-07-12 | 2003-01-23 | Detlef Gausepohl | Raising, lowering physically handicapped persons involves fixing arms in position at about 90 degrees to vertical, applying traction force then vertical lifting force to raise to standing position |
WO2007014042A2 (en) * | 2005-07-22 | 2007-02-01 | Carlsbad International Export, Inc. | Bi-folding wheelchair |
US7607724B2 (en) * | 2006-08-16 | 2009-10-27 | Promen-Aid Innovations Ltd. | Collapsible support structure |
US7607725B2 (en) * | 2006-08-16 | 2009-10-27 | Promen-Aid Innovations Ltd. | Collapsible support structure |
US8419047B2 (en) | 2010-07-21 | 2013-04-16 | Karma Medical Products Co., Ltd. | Folding device for wheelchair |
DE102011112831A1 (en) | 2011-09-12 | 2013-03-14 | Trw Automotive Gmbh | Gurtbringersystem |
US8454048B1 (en) * | 2012-01-30 | 2013-06-04 | Columbia Medical Manufacturing, Llc | Folding wheelchair mechanism |
EP3120819B9 (en) * | 2012-07-31 | 2018-03-21 | Invacare International Sàrl | Foldable wheelchair frame including a self locking device |
EP2796121B1 (en) * | 2013-04-23 | 2015-07-08 | Gregor Horacek | Folding wheelchair |
EP3041446A4 (en) | 2013-09-06 | 2017-08-23 | Alu Rehab As | Folding mechanism for a folding wheelchair, backrest post for wheelchair and wheelchair |
CA2961184C (en) * | 2014-09-18 | 2023-04-25 | Thompson Lafferty Design Limited | A dual configuration portable wheelchair |
CA2965176C (en) * | 2014-10-22 | 2018-03-20 | Motion Composites Inc | Wheelchair seat assembly |
US9655794B2 (en) * | 2015-10-07 | 2017-05-23 | Edward T. Bednarz, III | Adjustable wheelchair |
US10501104B2 (en) * | 2017-07-18 | 2019-12-10 | Stanley R Simmons | Portable tote cart |
US10555866B2 (en) * | 2017-10-06 | 2020-02-11 | Protostar, Inc., a Delaware Corporation | Wheeled walker wheel direction lock apparatus and method |
-
2016
- 2016-05-26 DE DE102016109759.4A patent/DE102016109759A1/en active Pending
-
2017
- 2017-04-26 CN CN201780040603.6A patent/CN109475455B/en active Active
- 2017-04-26 WO PCT/EP2017/059913 patent/WO2017191004A1/en unknown
- 2017-04-26 EP EP17719593.0A patent/EP3452000B1/en active Active
- 2017-04-26 US US16/098,364 patent/US10980686B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
US10980686B2 (en) | 2021-04-20 |
WO2017191004A1 (en) | 2017-11-09 |
EP3452000B1 (en) | 2023-03-22 |
CN109475455A (en) | 2019-03-15 |
CN109475455B (en) | 2020-10-16 |
DE102016109759A1 (en) | 2017-11-02 |
US20190142662A1 (en) | 2019-05-16 |
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