CN101143121B - Chassis device for electric wheelchair - Google Patents
Chassis device for electric wheelchair Download PDFInfo
- Publication number
- CN101143121B CN101143121B CN2006101515138A CN200610151513A CN101143121B CN 101143121 B CN101143121 B CN 101143121B CN 2006101515138 A CN2006101515138 A CN 2006101515138A CN 200610151513 A CN200610151513 A CN 200610151513A CN 101143121 B CN101143121 B CN 101143121B
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- electric wheelchair
- frame unit
- articulated
- connection rod
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Abstract
A chassis device of an electric wheelchair includes a frame unit, a linking unit, a wheel unit and a power unit. The frame unit is provided with a first arrangement of a bottom border which is provided with a first pin joint point, a second arrangement of a standing post which is provided with a second pin joint point and the second arrangement of the standing post of a third pin joint point. The linking unit is provided with two connecting rod groups, which are respectively arranged at two sides of the frame unit. The first connecting rod group is provided with an upper rocker which is articulated at the third pin joint point and extends forwards and backwards, a lower rocker which is articulated at the second pin joint point and extends forwards, a bottom rod which is articulated at the first pin joint point and extends backwards and a back rod which is articulated with the upper rocker and the bottom rod. The bottom rod and the back rod are used to absorb the oblique angle of the rod, which is caused by the up and down swing to bring comfort to the sitting person.
Description
[technical field]
The invention relates to a kind of base apparatus of electric wheelchair,, make the occupant feel the base apparatus of comfortable electric wheelchair particularly about a kind of amplitude of fluctuation can reduce the wheelchair leaping over obstacles time.
[background technology]
Old man, physical handicaps for the injured people of leg muscle, bi-functional degeneration, or chronic sufferer etc. can't can select electric wheelchair (Electronic Wheelchair) as the auxiliary implement in order to ride instead of walk in the daily life with double-legged independent rows kinetic force person.
Because general road all has height rise and fall, the jolt situation of obstacle such as indefinite, the road surface of for example ladder, or projection etc., therefore, electric wheelchair preferably has the ability of crossing over above-mentioned obstacle.
As shown in Figure 1, 2, the base apparatus 10 of known electric wheelchair is U.S.'s bulletin No. the 7th, 040,429, patent No. " Wheelchair suspension ", for crossing over the design of aforementioned obstacles.This base apparatus 10 is to be placed in a seat 11 belows, and can be controlled by a controller 12 that is adjacent to occupant's hand.This base apparatus 10 comprises interlock unit 17, two power packages 25 that a frame unit 13, is arranged at these frame unit 13 left and right sides respectively, and a wheel unit 26.
This frame unit 13 has a rectangular underframe 14, and respectively from these underframe 14 leading edges and a upwardly extending front apron 15 of trailing edge and a backboard 16.
This interlock unit 17 have two respectively with these frame unit 13 banded connection rod set 18, and two first and second springs 23,24.Each connection rod set 18 have one articulate with this mobile jib frame 19 with the banded mobile jib frame of this frame unit 13 19, one and the upper rocker arm that extends forwards, backwards 20, articulates with these upper rocker arm 20 front ends and the preceding wheel seat bar 21 of extension down, this preceding wheel seat bar 21 of pivot joint and with this upper rocker arm 20 between the upper and lower every lower shake-changing arm 22.Wherein, by this mobile jib frame 19, upper rocker arm 20, preceding wheel seat bar 21, and lower shake-changing arm 22 promptly constitutes so-called quadric chain (Four-bar Linkage).
This mobile jib frame 19 have one can with this frame unit 13 before, backboard 15,16 combines vertical section that fixed horizontal segment 191, extends from these horizontal segment 191 front ends 192, downwards from these horizontal segment 191 rear ends backward and the section of retreading 193 of extending downwards, and this horizontal segment 191 of an oblique connection and vertical section 192 preceding oblique section 194.This seat 11 promptly is to be arranged on the horizontal segment 191 of this two mobile jibs frame 19.
This upper rocker arm 20 has principal arm section 201, a straight arm section 202 that extends from these principal arm section 201 rear ends that is articulated on preceding oblique section 194 of this mobile jib frame 19 downwards, and one from this straight arm section 202 forward and the extension 203 of extending downwards.Each first spring 23 is to connect vertical section 192 bottoms of each mobile jib frame 19 and the principal arm section 201 and the contiguous corresponding preceding wheel seat bar 21 of each upper rocker arm 20.And each second spring 24 is to connect the horizontal segment 191 of each mobile jib frame 19 and the straight arm section 202 of each upper rocker arm 20.
This two power packages 25 is that the extension 203 that is connected to this two upper rocker arm 20 also is electrically connected with this controller 12 respectively.
This wheel unit 26 have two be articulated in respectively this before two the front-wheels 27, two of wheel seat bars 21 articulate the trailing wheel 28 of the section of retreading 193 of this mobile jib frame 19 respectively, reach two driving wheels 29 that can be ordered about rotation respectively by this two power packages 25.
The occupant sees through to pull this controller 12, to control this two power packages 25, distinctly drives turning to of this two driving wheel 29 whereby, reaches craspedodrome, turns to, or action such as retreat.
Shown in Fig. 3,4, known base apparatus 10 is that the letter with the connecting rod pattern is intended to represent.This base apparatus 10 is designs of two connection rod set 18 (only showing one among the figure) of utilizing this interlock unit 17, can allow electric wheelchair cross over as ladder, or obstacle such as projection road surface.When electric wheelchair was crossed over the high obstacle that rises, its front-wheel 27 was upwards during lifting, can each mobile jib frame 19 of interlock and extension 203 swings one tilt angle theta of upper rocker arm 20
1, θ
2(be benchmark with the state of not stepping up obstacle).And each driving wheel 29 is in rotating (counterclockwise) process, also can be to front slide.In Fig. 4, be to represent original state with imaginary line, the state after lifting on the front-wheel 27 is then represented with solid line.On the contrary, in the time of will leaving this obstacle as if electric wheelchair, relevant element then is to carry out to be in reverse to above-mentioned action, no longer dilates herein.
Shown in Fig. 5,6, and cooperate Fig. 3, wherein, Fig. 5 and Fig. 6 show that known base apparatus 10 was stepped up highly to be respectively 10,20,30,40 in 1 second, when reaching the various differing heights step of 50mm, and the tilt angle theta of its mobile jib frame 19
1Tilt angle theta with the extension 203 of upper rocker arm 20
2The process that changes.Wherein, tilt angle theta
1The tilt condition that promptly is equivalent to this seat 11.Can find, when obstacle height during at 50mm, the tilt angle theta of mobile jib frame 19
1Greater than 2 °, and when this tilt angle theta
1Heal when big, then can allow the occupant more feel uncomfortable.
Moreover when lifting on this two front-wheel 27, described driving wheel 29 can (be a tilt angle theta to front slide with the swing situation that is in reverse to the rotation of driving wheel 29 also except the rotation of self under compulsion
2).What specify is because this mobile jib frame 19 must form pivot joint with this upper rocker arm 20, to that is to say tilt angle theta
2Certainly will exist.As can be seen from Figure 6, when obstacle height during at 50mm, the tilt angle theta of the extension 203 of upper rocker arm 20
2Above 10 °.And these two kinds of situations will be quickened the wearing and tearing of this driving wheel 29, cause useful life's shortening, even also can influence the smoothness that this two power packages 25 is rotated.
[summary of the invention]
The objective of the invention is to be to provide a kind of base apparatus of electric wheelchair, can allow the occupant feel comparatively comfortable, and reduce the degree of component abrasion, to guarantee the useful life.
In order to achieve the above object, the invention provides a kind of base apparatus of electric wheelchair, comprise: a frame unit, an interlock unit, a wheel unit, an and power unit, this frame unit has a underframe, two respectively from the upwardly extending column of these underframe leading edge two opposition sides, and two mobile jibs that connect this two column respectively and extend back, the both sides of this underframe are respectively arranged with the two first corresponding pivoting points, each column is provided with one second pivoting point, and each mobile jib is provided with one the 3rd pivoting point.This interlock unit has two connection rod set that are divided into two opposition sides of this frame unit, each connection rod set has one and is articulated in the 3rd pivoting point of corresponding mobile jib and extends forwards, backwards and form a front contact and the upper rocker arm, of a back contact and be articulated in second pivoting point of corresponding column and extend forward and the lower shake-changing arm, that forms a front contact is articulated in the preceding wheel seat bar, of the front contact of this upper rocker arm and lower shake-changing arm and is articulated in first pivoting point of this underframe and extends back and form the bottom side bar of a back contact, reaches a postero lateral arm that is articulated in the back contact of this upper rocker arm and bottom side bar.This wheel unit is in articulating this frame unit and interlock unit.This power unit is to rotate in order to drive this wheel unit, drives this electric wheelchair whereby and moves.
Effect of the present invention is: see through the bottom side bar of this two connection rod set and the setting of postero lateral arm, electric wheelchair is when leaping over obstacles, can reduce the degree that swings up and down the two mobile jibs inclination of this frame unit that causes because of this two upper and lower rocking arm, make the occupant when taking, do not have the too big situation of shaking, and can feel comparatively comfortable, and can reduce the degree of component abrasion, to guarantee the useful life.
[description of drawings]
Fig. 1 is a side view, and the base apparatus that known electric wheelchair is described is to be incorporated into the below of a seat and to be controlled by a controller;
Fig. 2 is a three-dimensional exploded view, and the aspect of the base apparatus of known electric wheelchair is described;
Fig. 3 is an illustrative view, and the base apparatus that known electric wheelchair is described is striden the aspect to the obstacle;
Fig. 4 is an illustrative view, and the base apparatus that known electric wheelchair is described is the aspect that moves down from this obstacle;
Fig. 5 is a curve chart, illustrates that known base apparatus strides when moving on this obstacle the tilt angle theta of its mobile jib frame
1The variation situation;
Fig. 6 is a curve chart, illustrates that known base apparatus strides when moving on this obstacle the tilt angle theta of the extension of its top link
2Change situation;
Fig. 7 is a side view, and the preferred embodiment of the base apparatus of electric wheelchair of the present invention is described, is to be incorporated into the below of a seat and to be controlled by a controller;
Fig. 8 is a three-dimensional exploded view, and the aspect of the base apparatus of this electric wheelchair is described;
Fig. 9 is an illustrative view, and the base apparatus that electric wheelchair of the present invention is described is striden the aspect to the obstacle;
Figure 10 is an illustrative view, and the base apparatus that electric wheelchair of the present invention is described is the aspect that moves down from this obstacle;
Figure 11 is a curve chart, illustrates that this base apparatus strides when moving on this obstacle the tilt angle alpha of its mobile jib
1The variation situation; And
Figure 12 is a curve chart, illustrates that this base apparatus strides when moving on this obstacle the tilt angle alpha of its bottom side bar
2The variation situation.
[specific embodiment]
About aforementioned and other technology contents, characteristics and effect of the present invention, in the following detailed description that cooperates with reference to a graphic preferred embodiment, can clearly present.
Shown in Fig. 7,8, the preferred embodiment of the base apparatus of electric wheelchair of the present invention is the below that is attached at a seat 3, and controlled by a controller 4, this base apparatus comprises a frame unit 5, an interlock unit 6, a wheel unit 7, and a power unit 8.
This frame unit 5 has rectangular without exception underframe 51, two respectively from the backboard 54 that the upwardly extending column 52, two of these underframe 51 leading edges two opposition sides connects this two column 52 respectively and the mobile jib that extends back 53, extends upward and is connected with this two mobile jib 53 from these underframe 51 trailing edges, and two braces 55.This underframe 51, column 52, mobile jib 53 match with backboard 54 and can define one in order to ccontaining at least one power storage devices accommodation space 50 of (figure does not show), and for example the storage battery of rechargeable type provides electric power to this power unit 8 by this power storage devices.This seat 3 is to combine and fix with this two mobile jib 53.
The left and right sides of this underframe 51 is respectively arranged with two corresponding first pivoting points 511, and each column 52 is provided with one second pivoting point 521, and each mobile jib 53 is provided with one the 3rd pivoting point 531.Wherein, this 2 first pivoting point 511 is comparatively contiguous with second pivoting point 521.In this preferred embodiment, described contact 511,521,531 promptly is the protruding pin that sets firmly on this underframe 51, column 52, the mobile jib 53, can form the pivot joint state for wearing.
This two brace 55 is to be connected locking with 2 first pivoting points 511 of this underframe 51 and second pivoting point 521 of this two column 52 respectively.
This interlock unit 6 has two connection rod set 61 that are divided into two opposition sides of this frame unit 5, two first and replys part 62, and two second are replied parts 63.
Each connection rod set 61 has one and is articulated in the 3rd pivoting point 531 of corresponding mobile jib 53 and extends forwards, backwards and form the upper rocker arm 611 of a front contact 616 and a back contact 617, one is articulated in second pivoting point 521 of corresponding column 52 and extends forward and form the lower shake-changing arm 612 of a front contact 618, one is articulated in the front contact 616 of this upper rocker arm 611 and lower shake-changing arm 612,618 preceding wheel seat bar 613, one is articulated in first pivoting point 511 of this underframe 51 and extends back and form the bottom side bar 614 of a back contact 619, and a back contact 617 that is articulated in this upper rocker arm 611 and bottom side bar 614,619 postero lateral arm 615.The mobile jib 53 of this frame unit 5, upper rocker arm 611, lower shake-changing arm 612, preceding wheel seat bar 613, bottom side bar 614 are to constitute so-called six bar mechanism (Six-bar Linkage) with postero lateral arm 615.
This 2 first reply two braces 55 that part 62 2 is connected to this frame unit 5 and the upper rocker arm 611 of this two connection rod set 61 and comparatively deflection should before wheel seat bar 613.2 second to reply part 63 be two to connect the postero lateral arm 615 of this two connection rod set 61 and two mobile jibs 53 of frame unit 5 respectively for this.Described first and second answer part 62,63 mainly provides response force and gives this two connection rod set 61, makes it to revert back to the state when being positioned at the level land.And the position of its setting remains in many kinds variations, is difficult to state clearly one by one at this, should not limit to claim of the present invention with the disclosed aspect of present embodiment.In this preferred embodiment, described first and second replied part 62,63 and is spring.
This wheel unit 7 has two and is divided into the trailing wheel 72 that front-wheel 71, two under the preceding wheel seat bar 613 of this two connection rod set 61 is divided into two mobile jibs, 53 rear ends of this frame unit 5 rotationally rotationally, and two driving wheels 73 that are connected with this power unit 8 respectively.
This power unit 8 has two and is arranged on the bottom side bar 614 of this two connection rod set 61 respectively and the reduction gear box 81 of this two driving wheel 73 of socket, and two are electrically connected with this controller 4 respectively in order to order about the motor 82 that this two reduction gear box 81 turns round.Therefore, the occupant can to control the rotation of this two driving wheel 73, drive this electric wheelchair and move by handling this controller 4, allows the occupant move to destination with regard.
Shown in Fig. 9,10, this base apparatus is to show with the letter of connecting rod pattern intention, and represents original state with imaginary line, and represent with solid line to lift or descend after state.When electric wheelchair runs into the obstacle of a projection, the preceding wheel seat bar 613 of described connection rod set 61 can and then upwards be lifted gradually and move along with the preceding of electric wheelchair, and drive each upwards swing of upper and lower rocking arm 611,612, and each bottom side bar 614 of interlock is done relative rotation with postero lateral arm 615, and two mobile jibs 53 of this frame unit 5 can upwards be swung a tilt angle alpha
1(to be to be benchmark) with the state of not stepping up obstacle.Otherwise in the time of will leaving this obstacle as if electric wheelchair, then upper rocker arm 611, lower shake-changing arm 612, preceding wheel seat bar 613, bottom side bar 614 are to carry out towards being in reverse to above-mentioned action mutually with 615 of postero lateral arms.
Should be noted that from figure and can find, described driving wheel 73 on electric wheelchair, lift or the process that descends in, moving of trace only arranged, compared to known, the situation of its wearing and tearing can effectively be improved.
Shown in Figure 11,12, and cooperate Fig. 9, wherein, Figure 11 and Figure 12 show that base apparatus of the present invention was stepped up highly to be respectively 10,20,30,40 in 1 second, when reaching the obstacle (as step) of the various differing heights of 50mm, and the tilt angle alpha of its mobile jib 53
1With bottom side bar 614 tilt angle alpha
2Change procedure, central tilt angle alpha
1Be the inclination situation of these seat 3 (see figure 7)s.Can find that when obstacle height during at 50mm, the tilt angle alpha 1 of described mobile jib 53 has been reduced to less than 1.5 °.In other words, when this tilt angle alpha 1 more hour, the inclination situation of these seat 3 (see figure 7)s is more not obvious, therefore, the occupant can feel comparatively comfortable when leaping over obstacles.
In addition, when lifting on this two front-wheel 71, because the relation of the described bottom side of meeting interlock bar 614, it can cause swing (that is the tilt angle alpha that is in reverse to driving wheel 73 and turns to
2).Shown on Figure 12, when obstacle height during at 50mm, the tilt angle alpha of described bottom side bar 614
2Also be reduced to less than 5 °.And situation about descending for this two front-wheel 71, because the swaying direction of described bottom side bar 614 is to be identical with turning to of driving wheel 73, so the situation of wearing and tearing is not had too much influence.Be realized that according to above-mentioned explanation the present invention not only can reduce the tilt angle alpha of described bottom side bar 614
2, and described driving wheel 73 whereby, reduces the abrasion condition of described driving wheel 73, and then guarantees the useful life of related elements, and the motor 82 of this power unit 8 can be turned round smoothly under compulsion to the also significantly improvement of situation of front slide.
Conclude above-mentioned, the base apparatus of electric wheelchair of the present invention, it mainly is the kenel that described connection rod set 61 is designed to six connecting rods, design compared with known four connecting rods also has more two rod members, that is utilize described bottom side bar 614 and postero lateral arm 615, can absorb because this two upper and lower rocking arm 611,612 swings up and down the tilt angle alpha of two mobile jibs 53 of this frame unit 5 that causes
1, allow the occupant when leaping over obstacles, feel comparatively comfortable.Simultaneously, also can reduce the tilt angle alpha of described bottom side bar 614
2, make the driving wheel 73 that is attached thereto when rotating, do not have too big slip and reverse swing, effectively reduce the abrasion situation of driving wheel 73, and make these power unit 8 runnings comparatively smooth and easy, so can reach the present invention's purpose really.
The above person of thought, only for the present invention's preferred embodiment, when the scope that can not limit the invention process with this, promptly the simple equivalent of being done according to the present patent application claim and invention description content generally changes and modifies, and all still belongs in the scope that patent of the present invention contains.
[main element symbol description]
3 seats, 614 bottom side bars
4 controllers, 615 postero lateral arms
5 frame units, 616 front contacts
50 accommodation spaces, 617 back contacts
51 underframes, 618 front contacts
511 first pivoting points, 619 back contacts
52 columns 62 first are replied part
521 second pivoting points 63 second are replied part
53 mobile jibs, 7 wheel unit
531 the 3rd pivoting points, 71 front-wheels
54 backboards, 72 trailing wheels
55 braces, 73 driving wheels
6 interlock unit, 8 power units
61 connection rod set, 81 reduction gear boxes
611 upper rocker arms, 82 motors
612 lower shake-changing arm α
1The angle of inclination
Wheel seat bar α before 613
2The angle of inclination
Claims (8)
1. the base apparatus of an electric wheelchair comprises:
One frame unit, has a underframe, two respectively from the upwardly extending column of these underframe leading edge two opposition sides, and two mobile jibs that connect this two column respectively and extend back, the both sides of this underframe are respectively arranged with the two first corresponding pivoting points, each column is provided with one second pivoting point, and each mobile jib is provided with one the 3rd pivoting point;
One interlock unit, have two connection rod set that are divided into two opposition sides of this frame unit, each connection rod set has one and is articulated in the 3rd pivoting point of corresponding mobile jib and extends forwards, backwards and form the upper rocker arm of a front contact and a back contact, one is articulated in second pivoting point of corresponding column and extends forward and form the lower shake-changing arm of a front contact, one is articulated in the preceding wheel seat bar of the front contact of this upper rocker arm and lower shake-changing arm, one is articulated in first pivoting point of this underframe and extends back and form the bottom side bar of a back contact, and a postero lateral arm that is articulated in the back contact that shakes buttocks and bottom side bar on this; This interlock unit also have two connect respectively this frame unit and connection rod set upper rocker arm first reply part, and two connect the postero lateral arm of this two connection rod set and the second answer part of two mobile jibs of frame unit respectively,
One wheel unit is articulated in this frame unit and interlock unit; And
One power unit rotates in order to drive this wheel unit, drives this electric wheelchair whereby and moves.
2. the base apparatus of electric wheelchair according to claim 1, it is characterized in that: this frame unit also has two braces that are connected with second pivoting point of 2 first pivoting points of this underframe and this two column respectively, and first two ends of replying part of each connection rod set are to connect corresponding brace and upper rocker arm respectively.
3. as the base apparatus of electric wheelchair as described in the claim 2, it is characterized in that: this power unit has two reduction gear boxes that are connected to the bottom side bar of this two connection rod set, and two motors that can order about this two reduction gear boxes running respectively.
4. as the base apparatus of electric wheelchair as described in the claim 3, it is characterized in that: this wheel unit has the trailing wheel that two front-wheels, two that are divided into the preceding wheel seat bar of this two connection rod set rotationally are divided into two mobile jib rear ends of this frame unit rotationally, and two driving wheels that are connected with two reduction gear boxes of this power unit respectively.
5. as the base apparatus of electric wheelchair as described in the claim 4, it is characterized in that: this frame unit also has a backboard that extends upward and be connected with this two mobile jib from this underframe trailing edge.
6. the base apparatus of electric wheelchair according to claim 1 is characterized in that: this power unit has two reduction gear boxes that are connected to the bottom side bar of this two connection rod set, and two motors that can order about this two reduction gear boxes running respectively.
7. as the base apparatus of electric wheelchair as described in the claim 6, it is characterized in that: this wheel unit has the trailing wheel that two front-wheels, two that are divided into the preceding wheel seat bar of this two connection rod set rotationally are divided into two mobile jib rear ends of this frame unit rotationally, and two driving wheels that are connected with two reduction gear boxes of this power unit respectively.
8. as the base apparatus of electric wheelchair as described in the claim 7, it is characterized in that: this frame unit also has a backboard that extends upward and be connected with this two mobile jib from this underframe trailing edge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101515138A CN101143121B (en) | 2006-09-12 | 2006-09-12 | Chassis device for electric wheelchair |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006101515138A CN101143121B (en) | 2006-09-12 | 2006-09-12 | Chassis device for electric wheelchair |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101143121A CN101143121A (en) | 2008-03-19 |
| CN101143121B true CN101143121B (en) | 2010-08-18 |
Family
ID=39205978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006101515138A Expired - Fee Related CN101143121B (en) | 2006-09-12 | 2006-09-12 | Chassis device for electric wheelchair |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101143121B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103083146A (en) * | 2013-02-01 | 2013-05-08 | 李明科 | Wheel chair with rotatable seat |
| CN104691681B (en) * | 2013-12-09 | 2017-06-16 | 光阳工业股份有限公司 | Sitting posture individual's transport carrier |
| EP3266433B1 (en) * | 2016-07-07 | 2020-05-06 | Permobil AB | Swing arm linkage for a mid-wheel drive wheelchair |
| CN108095932A (en) * | 2017-12-05 | 2018-06-01 | 福尔智能科技南通有限公司 | A kind of intelligent bed chair |
| CN108095938A (en) * | 2017-12-05 | 2018-06-01 | 福尔智能科技南通有限公司 | A kind of multifunctional bed chair |
| CN109124905B (en) * | 2018-07-27 | 2020-11-03 | 泉州台商投资区集瑞科技有限公司 | Multifunctional cart |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1138825A (en) * | 1994-11-18 | 1996-12-25 | 德冈达-雷哈伯有限公司 | Wheel-chair for transporting or assisting the displacement of at least one user, particularly for a handicaped person |
| CN2600083Y (en) * | 2003-01-20 | 2004-01-21 | 国睦工业股份有限公司 | Improvement of back antivibration system of electric wheel chair |
| US6851711B2 (en) * | 2002-08-16 | 2005-02-08 | Invacare Corporation | Vehicle having an anti-dive/lockout mechanism |
| US7040429B2 (en) * | 2001-10-10 | 2006-05-09 | Invacare Corporation | Wheelchair suspension |
-
2006
- 2006-09-12 CN CN2006101515138A patent/CN101143121B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1138825A (en) * | 1994-11-18 | 1996-12-25 | 德冈达-雷哈伯有限公司 | Wheel-chair for transporting or assisting the displacement of at least one user, particularly for a handicaped person |
| US5964473A (en) * | 1994-11-18 | 1999-10-12 | Degonda-Rehab S.A. | Wheelchair for transporting or assisting the displacement of at least one user, particularly for handicapped person |
| US7040429B2 (en) * | 2001-10-10 | 2006-05-09 | Invacare Corporation | Wheelchair suspension |
| US6851711B2 (en) * | 2002-08-16 | 2005-02-08 | Invacare Corporation | Vehicle having an anti-dive/lockout mechanism |
| CN2600083Y (en) * | 2003-01-20 | 2004-01-21 | 国睦工业股份有限公司 | Improvement of back antivibration system of electric wheel chair |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101143121A (en) | 2008-03-19 |
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Granted publication date: 20100818 Termination date: 20190912 |