Seat arrangement and electrically powered wheelchair comprising the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
A61G-005/10
A61G-005/12
출원번호
US-0536509
(2015-12-17)
등록번호
US-10258522
(2019-04-16)
우선권정보
EP-14198783 (2014-12-18)
국제출원번호
PCT/EP2015/080230
(2015-12-17)
국제공개번호
WO2016/097148
(2016-06-23)
발명자
/ 주소
Kalf, Erik
Edholm, Anders
출원인 / 주소
PERMOBIL AB
대리인 / 주소
McAndrews, Held & Malloy, Ltd.
인용정보
피인용 횟수 :
0인용 특허 :
14
초록▼
The present disclosure relates to a seat arrangement (1) for an electrically powered wheelchair, wherein the seat arrangement comprises (1): a mounting arrangement for mounting the seat arrangement (1) to a chassis of an electrically powered wheelchair, a seat frame (3), a backrest frame (5), a back
The present disclosure relates to a seat arrangement (1) for an electrically powered wheelchair, wherein the seat arrangement comprises (1): a mounting arrangement for mounting the seat arrangement (1) to a chassis of an electrically powered wheelchair, a seat frame (3), a backrest frame (5), a backrest actuator (7), wherein the backrest frame (5) is pivotally coupled to the seat frame (3), forming a first pivot axis (A1), and wherein the backrest frame (5) is pivotally coupled to the backrest actuator (7), forming a translatable second pivot axis (A2), a retaining mechanism (11) arranged to retain the backrest frame (5) in an upright position while the backrest frame (5) is subjected to a forward-tilting force smaller than a threshold value, wherein the retaining mechanism (11) is arranged to allow movement of the backrest frame (5) to a forward-tilted position when the backrest frame (5) is subjected to a forward-tilting force equal to or greater than the threshold value, and a locking mechanism (13) arranged to lock the backrest frame (5) in the forward-tilted position. An electrically powered wheelchair comprising a seat arrangement is also disclosed herein.
대표청구항▼
1. A seat arrangement for an electrically powered wheelchair, wherein the seat arrangement comprises: a mounting arrangement for mounting the seat arrangement to a chassis of an electrically powered wheelchair,a seat frame,a backrest frame,a backrest actuator,wherein the backrest frame is pivotally
1. A seat arrangement for an electrically powered wheelchair, wherein the seat arrangement comprises: a mounting arrangement for mounting the seat arrangement to a chassis of an electrically powered wheelchair,a seat frame,a backrest frame,a backrest actuator,wherein the backrest frame is pivotally coupled to the seat frame, forming a first pivot axis, and wherein the backrest frame is pivotally coupled to the backrest actuator, forming a translatable second pivot axis,a retaining mechanism arranged to retain the backrest frame in an upright position while the backrest frame is subjected to a forward-tilting force smaller than a threshold value,wherein the retaining mechanism is arranged to allow movement of the backrest frame to a forward-tilted position when the backrest frame is subjected to a forward-tilting force equal to or greater than the threshold value, anda locking mechanism arranged to lock the backrest frame in the forward-tilted position. 2. The seat arrangement of claim 1, wherein the retaining mechanism is arranged to retain the backrest actuator in a first position while the backrest frame is subjected to the forward-tilting force smaller than a threshold value, wherein the backrest frame is arranged to pivot about the first pivot axis and the second pivot axis to obtain a forward-tilted position when the backrest frame is subjected to a forward-tilting force equal to or greater than the threshold value, wherein the retaining mechanism is arranged to allow movement, corresponding to the translation of the second pivot axis, of the backrest actuator to a second position, and wherein the locking mechanism is arranged to lock the backrest actuator in the second position to thereby lock the backrest frame in the forward-tilted position. 3. The seat arrangement of claim 1, wherein the backrest frame is arranged to pivot about the first pivot axis and the second pivot axis to the forward-tilted position when an equilibrium state acting about the first pivot axis is broken by the forward-tilting force. 4. The seat arrangement of claim 1, comprising a backrest actuator bracket attached to the seat frame, wherein the backrest actuator is fixedly attached to the backrest actuator bracket. 5. The seat arrangement of claim 4, wherein the locking mechanism is arranged to lock the backrest actuator bracket relative to the seat frame to thereby lock the backrest actuator in the second position. 6. The seat arrangement of claim 4, comprising a first fastener, wherein the seat frame has a first seat frame through-opening and the backrest actuator bracket has a first backrest actuator bracket through-opening, wherein the first fastener is arranged in the first seat frame through-opening and in the first backrest actuator bracket through-opening. 7. The seat arrangement of claim 6, wherein the first fastener, the first seat frame through-opening and first backrest actuator bracket through-opening form the retaining mechanism. 8. The seat arrangement of claim 6, comprising a second fastener, wherein the seat frame has a second seat frame through-opening and the backrest actuation bracket has a first slotted backrest actuation bracket through-opening wherein the second fastener is arranged in the second seat frame through-opening and slidably arranged in the first backrest actuation bracket slotted through-opening. 9. The seat arrangement of claim 8, wherein the first fastener has a first mechanical strength and the second fastener has a second mechanical strength, wherein the second mechanical strength is higher than the first mechanical strength. 10. The seat arrangement of claim 8, comprising a third fastener, wherein the seat frame comprises a first seat frame slotted through-opening, and wherein the backrest actuator bracket comprises a second backrest actuator bracket through-opening, wherein the third fastener is arranged in the second backrest actuator bracket through-opening and slidably arranged in the first seat frame slotted through-opening. 11. The seat arrangement of claim 6, wherein the seat frame comprises a keyway and the backrest actuator bracket comprises a biased key which form the locking mechanism, wherein the first fastener is designed to break when the backrest frame is subjected to a forward-tilting force equal to or greater than the threshold value allowing sliding of the backrest actuator bracket relative to the seat frame, wherein the biased key is arranged to engage the keyway to lock the backrest actuator in the second position. 12. The seat arrangement of claim 11, wherein the locking mechanism comprises a leaf spring, wherein the key is biased by the leaf spring. 13. The seat arrangement of claim 1, wherein the backrest actuator comprises the retaining member and the locking member. 14. An electrically powered wheelchair comprising: a chassis, andthe seat arrangement of claim 1 attached to the chassis.
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이 특허에 인용된 특허 (14)
Robinson William G. ; Taylor Robert A., Adjustable seat back assembly for a wheelchair.
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