IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0648267
(2006-12-29)
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등록번호 |
US-7819476
(2010-11-15)
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우선권정보 |
CN-2006 3 0088570(2006-06-30); CN-2006 3 0122026(2006-07-07) |
발명자
/ 주소 |
- Gong, Jiaxiong
- Yin, Ming
- Gong, Xiaojun
- Liu, Quan
- Zhang, Xiaoxiang
- Mao, Yongyong
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출원인 / 주소 |
- I-Trust Better Life Corp.
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대리인 / 주소 |
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인용정보 |
피인용 횟수 :
0 인용 특허 :
17 |
초록
▼
A support frame for use in a lift chair. In one embodiment, the support frame includes a base frame having longitudinally spaced transversely extending front and rear frame base rails; a first longitudinally extending side frame base rail connected to the front and rear frame base rails and a second
A support frame for use in a lift chair. In one embodiment, the support frame includes a base frame having longitudinally spaced transversely extending front and rear frame base rails; a first longitudinally extending side frame base rail connected to the front and rear frame base rails and a second longitudinally extending side frame base rail connected to the front and rear frame base rails, respectively, the first and second side frame base rails and the front and rear frame base rails being co-planar for supporting the lift chair on a surface; and a force balance member mounted to the rear frame base rail. The force balance member has a transversely extending base portion, a first arm portion extending from the base portion at a first angle αa, and an opposite, second arm portion extending from the base portion at a second angle αb.
대표청구항
▼
What is claimed is: 1. A support frame for use in a lift chair, comprising: (a) a base frame having longitudinally spaced transversely extending front and rear frame base rails; (b) a pair of transversely spaced longitudinally extending side frame base rails, rigidly connected to the front and rear
What is claimed is: 1. A support frame for use in a lift chair, comprising: (a) a base frame having longitudinally spaced transversely extending front and rear frame base rails; (b) a pair of transversely spaced longitudinally extending side frame base rails, rigidly connected to the front and rear frame base rails, remotely from ends of the front and rear frame base rails, respectively, the side frame base rails and the front and rear frame base rails being co-planar for supporting the lift chair on a surface; (c) a force balance member mounted to the rear frame base rail in at a strategic position, wherein the force balance member is U-shaped and has a transversely extending base portion, a first arm portion, which is extending from the base portion at a first angle αa, and an opposite, second arm portion, which is extending from the base portion at a second angle αb, and wherein the end of the first arm portion is directly connected to one of the pair of transversely spaced longitudinally extending side frame base rails and the end of the second arm portion is directly connected to the other of the pair of transversely spaced longitudinally extending side frame base rails, respectively, such that the first angle αa is nonzero and smaller than 90°, and the second angle αb is nonzero and smaller than 90°; (d) a pair of upstanding side plate members, fixedly connected approximately midway between the front and rear frame base rails to respective ones of the side frame base rails substantially at positions of connection thereof with the first arm portion and second arm portion, respectively; and (e) a support member configured to engage with a motor and mounted to the force balance member and the rear frame base rail at the strategic position, wherein the strategic position is substantially coincident with the geometric center of the rear frame base rail. 2. The support frame of claim 1, wherein the support member comprises a first L-shaped side plate member and a spaced apart, second L-shaped side plate member, which are respectively connected to a base plate member, and wherein the first L-shaped side plate member, second L-shaped side plate member and base plate member are configured such that when the support member is mounted to the force balance member and the rear frame base rail at the strategic position, a lower side of the first L-shaped side plate member is fixedly connected to and supported by an upper side of the rear frame base rail at a corresponding position, a contact side of the first L-shaped side plate member is fixedly connected to the transversely extending base portion of the force balance member at a corresponding position, a lower side of the second L-shaped side plate member is fixedly connected to and supported by the upper side of the rear frame base rail at a corresponding position, a contact side of the second L-shaped side plate member is fixedly connected to the transversely extending base portion of the force balance member at a corresponding position, and a side of the base plate member is fixedly connected to the transversely extending base portion of the force balance member at a corresponding position, respectively. 3. The support frame of claim 2, wherein each of the first L-shaped side plate member and second L-shaped side plate member defines a hole. 4. The support frame of claim 1, wherein the first arm portion of the force balance member and corresponding portions of the rear frame base rail and side frame base rail enclose an area that is substantially triangular. 5. The support frame of claim 4, wherein the second arm portion of the force balance member and corresponding portions of the rear frame base rail and side frame base rail enclose an area that is substantially triangular. 6. The support frame of claim 1, wherein the first angle αa and the second angle αb are different or substantially same. 7. A support frame for use in a lift chair, comprising: (a) a base frame having longitudinally spaced transversely extending front and rear frame base rails; (b) a first longitudinally extending side frame base rail connected to the front and rear frame base rails, and a second longitudinally extending side frame base rail connected to the front and rear frame base rails, respectively, the first and second side frame base rails and the front and rear frame base rails being co-planar for supporting the lift chair on a surface; and (c) a force balance member mounted to the rear frame base rail at a strategic position, wherein the force balance member has a transversely extending base portion, a first arm portion, which is extending from the base portion at a first angle αa, and an opposite, second arm portion, which is extending from the base portion at a second angle αb, and wherein the end of the first arm portion is directly connected to the first side frame base rail and the end of the second arm portion is directly connected to the second side frame base rail, respectively; a pair of upstanding side plate members, fixedly connected approximately midway between the front and rear frame base rails to respective ones of the side frame base rails substantially at positions of connection thereof with the first arm portion and second arm portion, respectively; and (d) a support member configured to engage with a motor and mounted to the force balance member and the rear frame base rail at the strategic position, wherein the strategic position is substantially coincident with the geometric center of the rear frame base rail. 8. The support frame of claim 7, wherein the support member comprises a first L-shaped side plate member and a spaced apart, second L-shaped side plate member, which are respectively connected to a base plate member, and wherein the first L-shaped side plate member, second L-shaped side plate member and base plate member are configured such that when the support member is mounted to the force balance member and the rear frame base rail at the strategic position, a lower side of the first L-shaped side plate member is fixedly connected to and supported by an upper side of the rear frame base rail at a corresponding position, a contact side of the first L-shaped side plate member is fixedly connected to the transversely extending base portion of the force balance member at a corresponding position, a lower side of the second L-shaped side plate member is fixedly connected to and supported by the upper side of the rear frame base rail at a corresponding position, a contact side of the second L-shaped side plate member is fixedly connected to the transversely extending base portion of the force balance member at a corresponding position, and a side of the base plate member is fixedly connected to the transversely extending base portion of the force balance member at a corresponding position, respectively. 9. The support frame of claim 8, wherein each of the first L-shaped side plate member and second L-shaped side plate member defines a hole. 10. The support frame of claim 9, wherein the first arm portion and the second arm portion are formed to be symmetric about an axis A passing through the geometric center of the rear frame base rail. 11. The support frame of claim 10, wherein the rear frame base rail has a first end portion and an opposite, second end portion, and a transversely extending body defined therebetween, wherein the first end portion is bended away from the transversely extending body of the rear frame base rail in a direction opposite to the direction that the first arm portion of the force balance member is bended away from the transversely extending base portion of the force balance member, and the second end portion is bended away from the transversely extending body of the rear frame base rail in a direction opposite to the direction that the second arm portion of the force balance member is bended away from the transversely extending base portion of the force balance member, and wherein the first end portion and the second end portion are formed to be symmetric about the axis A. 12. The support frame of claim 7, wherein the first angle αa is nonzero and smaller than 90°, and the second angle αb is nonzero and smaller than 90°. 13. The support frame of claim 12, wherein the first arm portion of the force balance member and corresponding portions of the rear frame base rail and side frame base rail enclose an area that is substantially triangular. 14. The support frame of claim 13, wherein the second arm portion of the force balance member and corresponding portions of the rear frame base rail and side frame base rail enclose an area that is substantially triangular. 15. The support frame of claim 12, wherein the first angle αa and the second angle αb are different or substantially same. 16. A lift chair having a seat portion for supporting a chair occupant, comprising: (a) a motor member having an extendible shaft portion for extending or retracting according to direction of motor rotation; and (b) a support frame for supporting the seat portion, the support frame comprising: (i) a base frame having longitudinally spaced transversely extending front and rear frame base rails; (ii) a first longitudinally extending side frame base rail connected to the front and rear frame base rails, and a second longitudinally extending side frame base rail connected to the front and rear frame base rails, respectively, the first and second side frame base rails and the front and rear frame base rails being co-planar for supporting the lift chair on a surface; (iii) a force balance member mounted to the rear frame base rail at a strategic position, wherein the force balance member has a transversely extending base portion, a first arm portion, which is extending from the base portion at a first angle αa, and an opposite, second arm portion, which is extending from the base portion at a second angle αb, and wherein the end of the first arm portion is directly connected to the first side frame base rail and the end of the second arm portion is directly connected to the second side frame base rail, respectively; (iv) a pair of upstanding side plate members, fixedly connected approximately midway between the front and rear frame base rails to respective ones of the side frame base rails substantially at positions of connection thereof with the first arm portion and second arm portion, respectively; and (v) a support member configured to engage with the motor member and mounted to the force balance member and the rear frame base rail at the strategic position, wherein the motor member is pivotally connected to the support member of the support frame for actuating motion of the motor member upon extension or retraction of the motor member shaft portion, thereby causing the seat portion to move from a first position to a second position in operation, and wherein the strategic position is substantially coincident with the geometric center of the rear frame base rail. 17. The lift chair of claim 16, wherein the support member comprises a first L-shaped side plate member and a spaced apart, second L-shaped side plate member, which are respectively connected to a base plate member, and wherein the first L-shaped side plate member, second L-shaped side plate member and base plate member are configured such that when the support member is mounted to the force balance member and the rear frame base rail at the strategic position, a lower side of the first L-shaped side plate member is fixedly connected to and supported by an upper side of the rear frame base rail at a corresponding position, a contact side of the first L-shaped side plate member is fixedly connected to the transversely extending base portion of the force balance member at a corresponding position, a lower side of the second L-shaped side plate member is fixedly connected to and supported by the upper side of the rear frame base rail at a corresponding position, a contact side of the second L-shaped side plate member is fixedly connected to the transversely extending base portion of the force balance member at a corresponding position, and a side of the base plate member is fixedly connected to the transversely extending base portion of the force balance member at a corresponding position, respectively. 18. The lift chair of claim 17, wherein each of the first L-shaped side plate member and second L-shaped side plate member defines a hole. 19. The lift chair of claim 16, wherein the first angle αa is nonzero and smaller than 90°, and the second angle αb is nonzero and smaller than 90°. 20. The lift chair of claim 19, wherein the first arm portion of the force balance member and corresponding portions of the rear frame base rail and side frame base rail enclose an area that is substantially triangular. 21. The lift chair of claim 20, wherein the second arm portion of the force balance member and corresponding portions of the rear frame base rail and side frame base rail enclose an area that is substantially triangular. 22. The lift chair of claim 19, wherein the first angle αa and the second angle αb are different or substantially same. 23. The lift chair of claim 16, further comprising at least one of a back portion, a leg support portion, and a foot rest portion. 24. The lift chair of claim 23, further comprising driving means for moving at least one of the back portion, leg support portion, and foot rest portion in response to the motor causing the seat portion to move from the first position to the second position, or vice versa. 25. The lift chair of claim 23, wherein the support frame further comprises a lifting member for lifting the seat portion, back portion, and leg support portion of the lift chair into a desired position, comprising: (a) an elevator frame having: (i) longitudinally spaced transversely extending front and rear elevator frame members, each of the front and rear elevator frame members having a central portion, intermediate portions extending generally downwardly from respective end portions of the central portion and being connected thereto via a gentle curvature, and extremity portions extending outwardly in a gentle curvature in a transverse direction from respective lower portions of the intermediate extending portions; (ii) a pair of transversely spaced longitudinally extending elevator frame side members, rigidly connected to respective end portions of the central portions of the front and rear elevator frame members, such that the pair of transversely spaced longitudinally extending elevator frame side members and the central portions of the front and rear elevator frame members are co-planar, wherein each of the pair of transversely spaced longitudinally extending elevator frame side members has a tab extending from one end portion of the elevator frame side member that is connected to the front elevator frame members; and (iii) a pair of transversely spaced longitudinally extending elevator frame side rails, rigidly connected to respective ends of the extremity portions of the front and rear elevator frame members, such that the pair of transversely spaced longitudinally extending elevator frame side rails and the extremity portions of the front and rear elevator frame members are co-planar; (b) a first pair of transversely spaced longitudinally extending elevator arms rigidly connected by one or more transversely extending bars, each of the first pair of transversely spaced longitudinally extending elevator arms having a first end portion and an opposite, second end portion, wherein the first end portions of the first pair of transversely spaced longitudinally extending elevator arms are pivotally mounted to respective ones of the extending tabs of the pair of transversely spaced longitudinally extending elevator frame side members, and the second end portions of the first pair of transversely spaced longitudinally extending elevator arms are pivotally mounted to respective ones of the pair of upstanding side plate members, respectively; and (c) a second pair of transversely spaced longitudinally extending elevator arms rigidly connected by one or more transversely extending bars, each of the second pair of transversely spaced longitudinally extending elevator arms having a first end portion and an opposite, second end portion, wherein the first end portions of the second pair of transversely spaced longitudinally extending elevator arms are pivotally mounted to respective ones of the extending tabs of the pair of transversely spaced longitudinally extending elevator frame side members, and the second end portions of the second pair of transversely spaced longitudinally extending elevator arms are pivotally mounted to respective ones of the pair of upstanding side plate members, respectively, such that the elevator frame is operably movable from a first position to a second position relative to the support frame, and vice versa. 26. The lift chair of claim 25, wherein when the elevator frame further comprises an engaging member rigidly connected to a position of the central portion of the front elevator frame members. 27. The lift chair of claim 26, further comprising a crank member having a first end portion pivotally connected to the engaging member of the elevator frame and a second end portion pivotally connected to the motor shaft portion for rotation responsively to extension or retraction of the motor shaft portion.
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