EP4218704A1 - Bedienbare kippschutzanordnung - Google Patents

Bedienbare kippschutzanordnung Download PDF

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Publication number
EP4218704A1
EP4218704A1 EP22212506.4A EP22212506A EP4218704A1 EP 4218704 A1 EP4218704 A1 EP 4218704A1 EP 22212506 A EP22212506 A EP 22212506A EP 4218704 A1 EP4218704 A1 EP 4218704A1
Authority
EP
European Patent Office
Prior art keywords
tip
unit
mounting
engaging portion
positioning
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.)
Pending
Application number
EP22212506.4A
Other languages
English (en)
French (fr)
Inventor
Yao-Lung Yang
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.)
Karma Medical Products Co Ltd
Original Assignee
Karma Medical Products Co Ltd
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 Karma Medical Products Co Ltd filed Critical Karma Medical Products Co Ltd
Publication of EP4218704A1 publication Critical patent/EP4218704A1/de
Pending legal-status Critical Current

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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
    • A61G5/10—Parts, details or accessories
    • A61G5/1089—Anti-tip devices
    • 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
    • A61G5/06—Chairs or personal conveyances specially adapted for patients or disabled persons, e.g. wheelchairs with obstacle mounting facilities, e.g. for climbing stairs, kerbs or steps

Definitions

  • an existing wheelchair 9 includes a main seat body 91 and an anti-tip apparatus 92.
  • the main seat body 91 has a seat frame 911, two front wheels 912, and two rear wheels 913.
  • the front and rear wheels 912, 913 are connected to the seat frame 911 in a front-rear manner.
  • the anti-tip apparatus 92 is integrally fixed to and is inclined rearwardly and downwardly relative to a lower part of the seat frame 911 to prevent the wheelchair 9 from tipping backwards for enhancing safety of a user (not shown).
  • the anti-tip apparatus 92 is integrally fixed on the main seat body 91, when the wheelchair 9 needs to be moved from a lower ground (e.g., a street) to a higher ground (e.g., a raised sidewalk), lifting the front wheels 912 while using the rear wheels 913 as a fulcrums is impeded by abutment of the anti-tip apparatus 92 against the lower ground. As a result, the wheelchair 9 is unable to be tilted further backwards. Hence, there is still room for improvement in the wheelchair 9.
  • a lower ground e.g., a street
  • a higher ground e.g., a raised sidewalk
  • an object of the disclosure is to provide an operable anti-tip assembly that can alleviate the aforesaid drawback of the prior art.
  • an operable anti-tip assembly is adapted for a wheelchair, and includes a control mechanism and an anti-tip mechanism.
  • the control mechanism includes a mounting unit and a positioning unit.
  • the mounting unit is adapted to be mounted at a rear end portion of the wheelchair in a removable manner, extends in a first direction, and defines a mounting space.
  • the positioning unit is disposed in the mounting space in a resiliently restorable manner and includes a first engaging portion.
  • the positioning unit is changeable within the mounting space between a locking state, where the first engaging portion engages the second engaging portion to prevent the anti-tip strut unit from moving relative to the mounting unit in the second direction, and an unlocking state, where the first engaging portion disengages from the second engaging portion to allow the anti-tip strut unit to be urged by the resilient member to move relative to the mounting unit in the second direction and away from the ground surface.
  • two operable anti-tip assemblies 10 are adapted for a wheelchair 81.
  • the wheelchair 81 includes a seat body 82, two front wheels 83 connected to a front end of the seat body 82, and two rear wheels 84 connected to a rear end of the seat body 82.
  • the seat body 82 includes two frame members 86 that are disposed at a bottom side of the seat body 82 and that extend in a front-rear direction.
  • the two operable anti-tip assemblies 10 are respectively assembled to rear end portions of the frame members 86. Since the two operable anti-tip assemblies 10 are identical, only one of the two operable anti-tip assemblies 10 is to be described hereinafter.
  • the wheelchair 81 is a manual wheelchair.
  • the wheelchair 81 may be a power wheelchair.
  • the number of the anti-tip assemblies 10 may be one as long as a rear end portion of the wheelchair 81 allows installation thereof.
  • the operable anti-tip assembly 10 includes a control mechanism 1 and an anti-tip mechanism 2.
  • the control mechanism 1 includes a mounting unit 11, a positioning unit 12, and a control member 13.
  • the mounting unit 11 is fixed to the rear end portion of the frame member 86 in a removable manner by a bolt 31 and a nut 32, and includes a first mounting tube 111 and a second mounting tube 113.
  • the first mounting tube 111 is in the form of a round tube that extends in a first direction (T1) parallel with the front-rear direction, and defines a mounting space 112 extending in the first direction (T1).
  • the second mounting tube 113 is fixedly connected to an outer peripheral surface of the first mounting tube 111, extends in a second direction (T2) inclined with respect to the first direction (T1), and is internally in communication with the first mounting tube 111.
  • the second mounting tube 113 has an abutment surface portion 114 that extends radially inwardly from an inner circumferential surface of the second mounting tube 113 in a position below a top end of the second mounting tube 113, and that faces upwardly toward the top end of the second mounting tube 113.
  • the positioning unit 12 is disposed in the mounting space 112 in a resiliently restorable manner, and includes a positioning member 121, a fixed plate 122, and a springy member 123.
  • the positioning member 121 is disposed in the mounting space 112 and is movable in the first direction (T1) relative to the mounting unit 11.
  • the fixed plate 122 is fixed in the mounting space 112 adjacent to the frame member 86, and is spaced apart from the positioning member 121.
  • the springy member 123 is disposed between and abuts against the positioning member 121 and the fixed plate 122.
  • the positioning member 121 is disposed between the control member 13 and the springy member 123, and has an abutting portion 124 and a first engaging portion 125.
  • the abutting portion 124 in a cylinder form extends in the first direction (T1) and abuts against the springy member 123.
  • the first engaging portion 125 protrudes and is narrowed from the abutting portion 124 in a manner away from the frame member 86.
  • the springy member 123 is a compression spring that urges the positioning member 121 to move away from the fixed plate 122. Specifically, the frame member 86 is inserted into the first mounting tube 111 in the first direction (T1) and communicates with the mounting space 112.
  • the fixed plate 122 and the springy member 123 may be disposed in the frame member 86 as long as the springy member 123 is disposed between the positioning member 121 and the fixed plate 122 to urge the positioning member 121 to move away from the fixed plate 122.
  • the anti-tip mechanism 2 includes an anti-tip strut unit 21 and a resilient member 22.
  • connection portion 214 is disposed below the first mounting tube 111 and is fixedly connected to a bottom end of the insertion portion 213.
  • the anti-tip portion 215 is connected to a bottom end of the connection portion 214 and is movable to touch the ground surface for preventing the wheelchair from tipping backwards.
  • the second engaging portion 216 is disposed on a front outer peripheral surface of the insertion portion 213.
  • a top end of the insertion portion 213 of the anti-tip strut 211 and the second mounting tube 113 are radially spaced apart from each other to define an accommodating space 210 therebetween.
  • the cap member 212 fixedly covers a top end of the anti-tip strut 211.
  • the cap member 212 has an annular end wall 217 that is sleeved fixedly on the top end of the insertion portion 213 of the anti-tip strut 211, and a tubular portion 219 that extends downwardly from an outer periphery of the annular end wall 217 in the second direction (T2).
  • the annular end wall 217 has an inner surface 218 facing downwardly.
  • the tubular portion 219 is sleeved movably on the second mounting tube 113.
  • the first engaging portion 125 of the positioning member 121 is a protruding tongue that extends from the abutting portion 124 of the positioning member 121 toward the anti-tip strut unit 21 and that is engageable with the second engaging portion 216 of the anti-tip strut 211.
  • the second engaging portion 216 of the anti-tip strut 211 is an engaging hole for engagement of the first engaging portion 125 therewithin.
  • the positioning unit 12 is changeable within the mounting space 112 between a locking state (see Figure 5 ), where the first engaging portion 125 of the positioning member 121 engages with the second engaging portion 216 of the anti-tip strut 211 to prevent the anti-tip strut unit 21 from moving relative to the mounting unit 11 in the second direction (T2) so that the anti-tip strut 211 is disposed adjacent to the ground surface, and an unlocking state (see Figure 6 ), where the first engaging portion 125 disengages from the second engaging portion 216 to allow the anti-tip strut unit 21 to be urged by the resilient member 22 to move relative to the mounting unit 11 in the second direction (T2) and away from the ground surface.
  • a locking state see Figure 5
  • the first engaging portion 125 of the positioning member 121 engages with the second engaging portion 216 of the anti-tip strut 211 to prevent the anti-tip strut unit 21 from moving relative to the mounting unit 11 in the second direction (T2) so that the anti-tip strut 211 is disposed
  • the anti-tip portion 215 of the anti-tip strut 211 is, but not limited to, a caster.
  • the anti-tip portion 215 may be a block to prevent the wheelchair 81 from tipping backward when the positioning unit 12 is in the locking state.
  • the positioning unit 12 is in the locking state to prevent backward tipping of the wheelchair 81.
  • the first engaging portion 125 engages the second engaging portion 216, and the anti-tip portion 215 is adjacent to the ground surface.
  • the anti-tip portion 215 touches the ground surface to prevent the wheelchair from tipping backward.
  • the anti-tip strut unit 21 When the wheelchair 81 is rotated backward about the rear wheels 84, which together serve as a fulcrum, the anti-tip strut unit 21 would not touch the ground surface. In other words, when the positioning unit 12 is in the unlocking state, the wheelchair 81 is not limited by the anti-tip strut 211 to rotating backward only by a small degree. As a result, the wheelchair 81 may easily rotate backward about the rear wheels 84, which serve as the fulcrum, until the front wheels 83 are raised and touch the higher ground, thereby transferring the whole wheelchair 81 onto the higher ground.
  • the user may step on a top end of the cap member 212 to move the anti-tip strut 211 downwardly until the second engaging portion 216 of the anti-tip strut 211 engages with the first engaging portion 125 of the positioning member 121, thereby changing the positioning unit 12 to the locking state to immobilize the anti-tip unit 21.
  • the anti-tip strut unit 21 is either immobilized or movable relative to the mounting unit 11.
  • the anti-tip strut unit 21 is immobilized by changing the positioning unit 12 to the locking state.
  • the anti-tip strut unit 21 is movable by changing the positioning unit 12 to the unlocking state.
  • the operable anti-tip assembly 10 is relatively practical and convenient to provide the wheelchair 81 both safety and mobility.
  • the user may directly step on either the control member 13 or the top end of the cap member 212 so that the anti-tip portion 215 of the anti-tip strut 211 may move away from or become adjacent to the ground surface; the user does not need to stoop down to operate the operable anti-tip assembly 10 using hands, and therefore the operation is relatively convenient.
  • Figures 7 to 10 illustrate an operable anti-tip assembly 10 according to a second embodiment of the disclosure.
  • the second embodiment is similar in structure and operation to the first embodiment. Only the differences between the second and first embodiments are to be described.
  • the second mounting tube 113 of the mounting unit 11 is omitted.
  • the first mounting tube 111 has a through slot 115 disposed above and spatially communicated with the mounting space 112.
  • the through slot 115 extends through the outer peripheral surface of the first mounting tube 111 and is elongated in the first direction (T1).
  • the positioning member 121 is rotatably and fixedly disposed in the mounting space 112 by a pivot member 37.
  • the positioning unit 12 further includes a resilient restoring member 127 connected between the first mounting tube 111 and the positioning member 121.
  • the first engaging portion 125 of the positioning member 121 has a barb configuration and extends towards the anti-tip mechanism 2.
  • the positioning member 121 further has an arm portion 128 connected to and disposed behind the first engaging portion 125.
  • the resilient restoring member 127 is sleeved around the arm portion 128.
  • a top end of the resilient member restoring 127 is fixedly connected to the positioning member 121.
  • a bottom end of the resilient member 127 is fixedly connected to a bottom side of an inner circumferential surface of the first mounting tube 111.
  • the resilient restoring member 127 provides a resilient force urging the arm portion 128 to move upwardly away from the bottom side of the inner circumferential surface of the first mounting tube 111 and toward the through slot 115.
  • the control member 13 extends upwardly from a top end of the positioning member 121.
  • the pressing portion 131 of the control member 13 extends outside the through slot 115, is thicker than the positioning member 121, and is pressable.
  • the restricting portion 132 and the pushing portions 133 are omitted from the control member 13 in this embodiment.
  • the control mechanism 1 further includes an abutting member 14 that is mounted in the mounting space 112 in a spaced-apart manner from the positioning member 121 of the positioning unit 12.
  • the anti-tip strut unit 21 is movably inserted through the mounting unit 11 in the second direction (T2), and the resilient member 22 is disposed in the anti-tip strut unit 21.
  • the anti-tip strut 211 of the anti-tip strut unit 21 is hollow and has a strut portion 213' that extends in the second direction (T2) while the insertion and connection portions 213, 214 are omitted from the anti-tip strut 211.
  • the anti-tip portion 215 of the anti-tip strut 211 is mounted to a bottom end of the strut portion 213'.
  • the cap member 212 of the anti-tip strut unit 21 covers a top end of the strut portion 213'.
  • a front side of the strut portion 213' is formed with a first elongated opening 42 that extends in the second direction (T2).
  • the resilient member 22 is sleeved around the mounting member 41, and abuts against and is disposed between the mounting member 41 and the abutting member 14, thereby urging the anti-tip strut unit 21 to move away from the ground surface.
  • Figures 9 and 10 illustrate the positioning unit 12 in the unlocking state and the locking state.
  • the positioning unit 12 When the positioning unit 12 is in the locking state (see Figure 10 ), the first engaging portion 125 of the positioning unit 12 engages with one of the second engaging portions 216' of the anti-tip strut 211 so that the anti-tip strut 211 is immobilized in the second direction (T2) in a manner that anti-tip portion 215 of the anti-tip strut 211 is disposed adjacent to the ground surface.
  • the cap member 212 When in use, the cap member 212 is stepped on by the user until the first engaging portion 125 engages with one of the second engaging portions 216' so as to change the positioning unit 12 from the unlocking state to the locking state.
  • the control member 13 is depressed to rotate the positioning member 121 of the positioning unit 12 in a direction (arrow A, as shown in Figure 10 ) so that the first engaging portion 125 disengages from the second engaging portions 216' and so that the anti-tip strut 211 is urged by the resilient member 22 to move away from the ground surface. Therefore, the operable anti-tip assembly 10 of the second embodiment is capable of achieving the same effect as the first embodiment.
  • FIGS 11 to 15 illustrate an operable anti-tip assembly 10 according to a third embodiment of the disclosure.
  • the third embodiment is similar in structure and operation to the second embodiment. Only the differences between the third and second embodiments are to be described.
  • the first mounting tube 111 further has an opening 116 that opens at a rear end thereof and that communicates with the through slot 115.
  • the positioning member 121 further has a first pushing portion 129 that is disposed on the top end of the positioning member 121 and that protrudes backward away from the anti-tip strut unit 21.
  • the control member 13 is rotatably disposed in the mounting space 112 of the first mounting tube 111 by a pivot member 39 and partially extends outside the mounting space 112.
  • the pressing portion 131 of the control member 13 extends outside and protrudes backward from the through slot 115 and the opening end 116.
  • the control member 13 further has a second pushing portion 135 that is disposed in the mounting space 112 and that is located forwardly relative to the pressing portion 131.
  • the second pushing portion 135 is rotatable by pressing the control member 13 to push the first pushing portion 129 for rotating the positioning member 121 about the pivot member 37 along a direction reverse to a direction (arrow B), thereby disengaging the first engaging portion 125 from the second engaging portion 216.
  • the resilient restoring member 127 of the positioning unit 12 is resiliently connected between the positioning member 121 and the control member 13 to urge rotation of the positioning member 121 about the pivot member 37 along the direction (arrow B) so that the first engaging portion 125 rotates toward the anti-tip strut unit 21 to engage the second engaging portion 216 and so that the first pushing portion 129 is rotated toward the second pushing portion 135.
  • the cap member 212 is omitted.
  • the control member 13 is pressed downwardly to rotate about the pivot member 39 along a direction (arrow C) so that the second pushing portion 135 is rotated upwardly to push the first pushing portion 129 in a manner that the positioning member 121 is driven to rotate about the pivot member 37 along the direction reverse to the direction (arrow B), thereby disengaging the first engaging portion 125 from the second engaging portion 216.
  • the anti-tip strut unit 21 is urged by the resilient member 22 to move away from the ground surface, and the positioning unit 12 is in the unlocking state.
  • the anti-tip strut unit 21 is immobilized or movable relative to the ground surface by the control member 13 driving the positioning unit 12 to switch between the locking and unlocking states for the first engaging portion 125 of the positioning unit 12 to engage with or disengage from the second engaging portion 216 of the anti-tip strut unit 21, and because the user need not stoop down to operate the operative anti-tip assembly 10, the operative anti-tip assembly 10 is convenient to use, not only for effectively preventing the wheelchair 81 from tipping backwards but also for allowing the wheelchair 81 to cross a tall obstacle, As a result, the wheelchair 81 with the operative anti-tip assembly 10 may be easily transferred onto grounds with various heights.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Handcart (AREA)
  • Knitting Of Fabric (AREA)
  • Seats For Vehicles (AREA)
EP22212506.4A 2022-01-28 2022-12-09 Bedienbare kippschutzanordnung Pending EP4218704A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
TW111103832A TWI805208B (zh) 2022-01-28 2022-01-28 反撐桿結構

Publications (1)

Publication Number Publication Date
EP4218704A1 true EP4218704A1 (de) 2023-08-02

Family

ID=84487529

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22212506.4A Pending EP4218704A1 (de) 2022-01-28 2022-12-09 Bedienbare kippschutzanordnung

Country Status (3)

Country Link
EP (1) EP4218704A1 (de)
CN (1) CN116549229A (de)
TW (1) TWI805208B (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6113189A (en) * 1998-10-01 2000-09-05 Lenjoy Engineering, Inc. Reclining seat back attachment for wheelchair
WO2019068183A1 (en) * 2017-10-02 2019-04-11 Motion Composites Inc. ANTI-TILT MECHANISM FOR WHEELCHAIR

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2459648B (en) * 2008-04-28 2011-04-06 Karma Medical Prod Co Ltd Supporting mechanism for a wheelchair cushion
CN103767838B (zh) * 2014-01-16 2016-03-02 常熟市平方轮椅有限公司 电动轮椅车
CN208677765U (zh) * 2017-11-08 2019-04-02 南京康尼智能技术有限公司 一种用于轮椅的功能件连接装置
CN107811777A (zh) * 2017-12-08 2018-03-20 徐州市科诺医学仪器设备有限公司 电动轮椅车

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6113189A (en) * 1998-10-01 2000-09-05 Lenjoy Engineering, Inc. Reclining seat back attachment for wheelchair
WO2019068183A1 (en) * 2017-10-02 2019-04-11 Motion Composites Inc. ANTI-TILT MECHANISM FOR WHEELCHAIR

Also Published As

Publication number Publication date
CN116549229A (zh) 2023-08-08
TWI805208B (zh) 2023-06-11
TW202329901A (zh) 2023-08-01

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