CN112618182A

CN112618182A - Wheelchair walking aid

Info

Publication number: CN112618182A
Application number: CN202011613397.3A
Authority: CN
Inventors: 李东坡; 封锦华
Original assignee: Guangdong Bofang Zhongji Medical Technology Co ltd
Current assignee: Guangdong Bofang Zhongji Medical Technology Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-04-09
Anticipated expiration: 2040-12-30
Also published as: CN112618182B

Abstract

The invention discloses a wheelchair walking aid, comprising: the connecting rods of each group comprise backrest rods, the backrest rods of each group are connected through backrest middle rods, the connecting rods of each group comprise sitting support rods, the sitting support rods of each group are connected through sitting support rods, and the sitting support rods are located below the backrest middle rods; and the two groups of wheels are respectively connected to the two groups of support rod groups. The distance between the front wheels and the rear wheels is adjustable, and the state conversion between the wheelchair and the walking aid can be conveniently and quickly realized.

Description

Wheelchair walking aid

Technical Field

The invention relates to the technical field of medical instruments, in particular to a wheelchair walking aid.

Background

In the related art, different types of wheelchairs and walking aids are available on the market, including electric and manual, but a wheelchair walking aid combining two forms of the walking aid and the wheelchair is lacking, and in both states of the wheelchair and the walking aid, the center distance between the front wheels and the rear wheels cannot be adjusted, and stability and operability cannot be simultaneously considered.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention aims to provide a wheelchair walking aid, the distance between the front wheels and the rear wheels can be adjusted, and the state conversion between a wheelchair and the walking aid can be conveniently and quickly realized.

A wheelchair walker in accordance with an embodiment of the present invention includes: the connecting rods of each group comprise backrest rods, the backrest rods of each group are connected through backrest middle rods, the connecting rods of each group comprise sitting support rods, the sitting support rods of each group are connected through sitting support rods, and the sitting support rods are located below the backrest middle rods; the two groups of wheels are respectively connected to the two groups of support rods, each group of wheels comprises a front wheel and a rear wheel which are arranged in front and at the back, and the rear wheel is positioned below the backrest rod; the seat plate is connected to the seat support middle rod; the adjusting driving piece is connected with at least one supporting rod group so as to adjust the angle between two connecting rods in the connected supporting rod group; wherein the adjustment drive is for driving the wheelchair walker to switch between a wheelchair configuration in which the backrest mid-bar is in a backrest position and a walker configuration; and when the walking aid is in the shape, the middle rod of the backrest is positioned at the front side of the backrest position, and the wheelchair walking aid is vacant along the up-down direction at the backrest position so as to accommodate a user using the wheelchair walking aid.

According to the wheelchair walking aid provided by the embodiment of the invention, the driving piece is adjusted to drive the two connecting rods in at least one group of supporting rod groups to rotate, so that the angle between the linkage rod groups consisting of the plurality of connecting rods is changed, the conversion between the wheelchair state and the walking aid state of the wheelchair walking aid is realized, the distance between the front wheels and the rear wheels can be adjusted, and the wheelchair walking aid is convenient and rapid. By adjusting the driving of the driving part, the walking aid can be stably supported by the user in both the walking aid state and the wheelchair state. When the walking aid is in a state, the upper position and the lower position of the backrest of the walking aid can be left, so that the body of a user is more close to the central position of the walking aid, the body of the user is more easily stabilized when the user uses the walking aid, and the body of the user is more stably supported by the walking aid.

In addition, the wheelchair walker according to the invention may also have the following additional technical features:

in some embodiments of the invention, the sitting plate is movably or detachably connected to the sitting support middle rod. Can be convenient for the disassembly, maintenance and replacement of the seat plate and also prevent the seat plate from blocking the wheelchair walking aid when the wheelchair walking aid is in a changeable state.

In some embodiments of the invention, the front and rear wheels are connected to different said links on the same said set of support bars, so that the distance between the front and rear wheels changes as the angle of the set of linkage bars changes. The distance between the front wheels and the rear wheels can be adjusted, so that the distance between the front wheels and the rear wheels is increased in the wheelchair state to keep more stable, the distance between the front wheels and the rear wheels is reduced in the walking aid state, and the turning radius is favorably reduced.

In some embodiments of the invention, a portion of the plurality of links of each set constitutes an armrest, and the armrests are respectively disposed on both sides of the seat plate. The user can be supported.

In some embodiments of the present invention, the plurality of links of the strut group further comprises: the rear end of the first lower rod is connected with the rear wheel; the first lower rod and the second lower rod are arranged in a crossed manner; two ends of the third lower rod are respectively hinged to the rear ends of the first lower rod and the second lower rod; two ends of the fourth lower rod are respectively hinged to the front ends of the first lower rod and the second lower rod, and the lower end of the fourth lower rod is connected with the front wheel; the first lower rod, the second lower rod, the third lower rod and the fourth lower rod form a reverse four-bar linkage mechanism, and the adjusting driving piece is connected with at least one of the connecting rods in the reverse four-bar linkage mechanism. Can be convenient for adjusting the distance between the front wheel and the rear wheel

In some embodiments of the present invention, a first middle rod is connected between the first lower rods of the two sets of the support rod sets, a second middle rod is connected between the second lower rods of the two sets of the support rod sets, the adjusting driving member is a telescopic member, and two ends of the telescopic member are respectively hinged to the first middle rod and the second middle rod. Can be convenient for the rapid adjustment of the limit state of the wheelchair walking aid.

In some embodiments of the present invention, a lower end of the back support rod is hinged to an upper end of the third lower rod, one end of the sitting support rod is hinged to the back support rod, the other end of the sitting support rod is hinged to the first lower rod, and a first forward four-bar linkage is formed among the back support rod, the third lower rod, the first lower rod and the sitting support rod. Can be convenient for realizing the rapid state adjustment of the wheelchair walking aid.

In some embodiments of the present invention, the plurality of links of the strut group further comprises: the rear end of the first upper rod is hinged to the backrest rod, and the first upper rod is positioned below the backrest middle rod and above the seat plate to form a grab rail; the upper end of the second upper rod is hinged to the first upper rod, the lower end of the second upper rod is hinged to the sitting support rod, and a second forward four-bar mechanism is formed between the backrest rod, the sitting support rod, the first upper rod and the second upper rod. Can be convenient for realizing the rapid state adjustment of the wheelchair walking aid.

In some embodiments of the invention, the wheelchair walker has a stowed configuration in which the back bar, the first upper bar, the second upper bar, the seat stay bar, and the first lower bar are brought together to overlap when the wheelchair walker is changed from the wheelchair configuration to the stowed configuration. Can be convenient for fold and store the wheelchair walking aid.

In some embodiments of the invention, the adjustment drive is an electric push rod. Can be convenient for realizing the rapid state adjustment of the wheelchair walking aid.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a perspective view of a wheelchair walker in accordance with an embodiment of the present invention;

FIG. 2 is a side view of a wheelchair walker according to an embodiment of the present invention;

FIG. 3 is a schematic perspective view of another angle of a wheelchair walker in accordance with an embodiment of the present invention;

FIG. 4 is a schematic perspective view of yet another angle of a wheelchair walker in accordance with an embodiment of the present invention;

FIG. 5 is a side view of a wheelchair walker in a collapsed condition according to an embodiment of the present invention;

FIG. 6 is a right side view of a wheelchair walker in a collapsed condition according to an embodiment of the present invention;

FIG. 7 is a side view of a walker configuration of a wheelchair walker according to an embodiment of the present invention;

FIG. 8 is a left side view of a walker configuration of a wheelchair walker according to an embodiment of the present invention.

Reference numerals:

a wheelchair walker 100;

a support rod group 1;

a connecting rod 11; a back rest lever 111; a seat stay 112; a first lower lever 113; a second lower bar 114; a third lower bar 115; a fourth lower bar 116; a first upper lever 117; a second upper rod 118;

a wheel 2; a front wheel 21; a rear wheel 22;

a seat plate 3;

adjusting the drive 4; a telescopic member 41;

a backrest middle bar 10; a sit-prop intermediate bar 20; a first intermediate lever 30; and a second intermediate lever 40.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

A wheelchair walker 100 in accordance with an embodiment of the present invention is described below with reference to FIGS. 1-8.

A wheelchair walker 100 in accordance with an embodiment of the present invention, as shown in FIGS. 1 and 2, includes: two sets of bracing piece group 1, two sets of wheels 2, seat 3 and adjust driving piece 4. Each group of support rod group 1 comprises a plurality of connecting rods 11, the two groups of connecting rods 11 are arranged in a one-to-one correspondence mode, and the plurality of connecting rods 11 of each group of support rod group 1 form a linkage rod group.

Thus, as shown in fig. 1, two sets of support rod sets 1 form two oppositely arranged support frames, and each support frame structure is formed by the connection of a plurality of connecting rods 11, so that two support frame structures can be formed by the two support rod sets 1, and the function of integral support of the wheelchair walker 100 is achieved.

The linkage rod group consisting of the plurality of connecting rods 11 consisting of each group of support rod groups 1 can stabilize the structure of the wheelchair walker 100, and can realize the rapid adjustment of the center distance of the wheelchair walker 100 through the linkage rod group, so that the conversion between the wheelchair state and the walker state of the wheelchair walker 100 can be adjusted, the operation is convenient, and the operation is simple and rapid.

When the angle between two connecting rods 11 in the same linkage rod group changes, the angles between the other connecting rods 11 are driven to change, that is, when the angle between every two connecting rods 11 in each linkage rod group changes, the two connecting rods 11 in each linkage rod group are in pivot connection, and when the angle between every two connecting rods 11 changes, the two connecting rods 11 can be driven to synchronously rotate with the other connecting rods 11 connected with the two connecting rods, so that the linkage of the connecting rods 11 in the linkage rod group is realized.

As shown in fig. 1 and 3, each group of the plurality of connecting rods 11 includes a backrest rod 111, two groups of the backrest rods 111 are connected through a backrest middle rod 10, each group of the plurality of connecting rods 11 includes a sitting support rod 112, two groups of the sitting support rods 112 are connected through a sitting support middle rod 20, and the sitting support middle rod 20 is located below the backrest middle rod 10.

As shown in fig. 1 and 3, as can be seen from the foregoing, each group of support rod groups 1 forms a structure similar to a support frame through the connection of a plurality of connecting rods 11, thereby performing the supporting and stabilizing functions. The two sets of support rod sets 1 are provided with backrest rods 111, and the two sets of support rod sets 1 are correspondingly arranged, so that the back positions between the two support rod sets 1 are connected by arranging a backrest middle rod 10 between the two backrest rods 111, thereby forming a back support structure of the wheelchair walking aid 100 and supporting the back of a user.

Correspondingly, the two groups of support rod groups 1 are respectively provided with a sitting support rod 112, so that a sitting support middle rod 20 is arranged between the two sitting support rods 112, the sitting support rods 112 of the two support rod groups 1 are stably connected, a supporting part capable of supporting the sitting structure of the wheelchair is formed, and the user can be stably supported when the wheelchair is used.

It can be understood that the position of the middle supporting rod 20 is below the middle backrest rod 10, that is, the height of the middle backrest rod 10 is higher, and the height of the middle supporting rod 20 is lower, so that the middle backrest rod 10 is higher to support the back of the user, and when the wheelchair walker 100 is changed into a walker state, the user can hold his hands to provide the supporting force for the user, and because the middle backrest rod 10 is higher, the user can use the walker by holding it on the middle backrest rod 10 more conveniently, and the user can support the walker conveniently. The lower height of the seat stay center bar 20 is understood to be a function of supporting the seating structure in the wheelchair state and also facilitating the seating of the user.

As shown in fig. 1 to 8, two sets of wheels 2 are respectively connected to two sets of support rod sets 1, each set of wheels 2 includes a front wheel 21 and a rear wheel 22 arranged in front and behind, and the rear wheel 22 is located below the backrest rod 111. The wheelchair walker 100 can be moved conveniently by arranging the front wheels 21 and the rear wheels 22, and the rear wheels 22 are arranged below the backrest rod 111, so that the rear position of the wheelchair walker 100 can be supported, the movement stability of the wheelchair walker 100 is ensured, and the wheelchair walker 100 can be powered.

As shown in fig. 1 to 3, the seat plate 3 is connected to the intermediate support rod 20, the seat plate 3 is the seating structure, and the seat plate 3 is provided on the intermediate support rod 20 to allow a user to sit thereon in a wheelchair state.

As shown in fig. 1-3, the adjustment drive 4 is connected to at least one of the groups of support bars 1 to adjust the angle between two links 11 in the connected group of support bars 1. Namely, the angle between two connecting rods 11 in at least one supporting rod group 1 can be adjusted by adjusting the driving piece 4, so that the angles of a plurality of connecting rods 11 of the linkage rod group can be adjusted by adjusting the angle between the two connecting rods 11, and the wheelchair walking aid 100 can be changed between a wheelchair state and a walking aid state.

Wherein, adjust driving piece 4 and can also locate two bracing piece groups 1 on, can adjust the angle of a plurality of connecting rods 11 of two bracing piece groups 1 simultaneously from this, convenient and fast.

Further, as shown in fig. 1 and 7, the adjusting driving member 4 is used for driving the wheelchair walker 100 to switch between the wheelchair state and the walker state, that is, the wheelchair walker 100 can be automatically adjusted between the wheelchair state and the walker state by adjusting the driving member 4, which is convenient and fast, and after the wheelchair walker 100 is adjusted, the wheelchair walker can be kept stable, so that the rotation or deviation of the angle between the plurality of connecting rods 11 after the supporting rod set 1 is pressed by the user is avoided, and potential hazards are avoided.

As shown in fig. 1-4, the center back bar 10 is in the back position in the wheelchair configuration. Back rest position as shown in fig. 1-4, the back rest center bar 10 is in a rear position of the wheelchair walker 100 and the back rest bar 111 of the entire wheelchair walker 100 is angled toward the rear side of the wheelchair walker 100, whereby the back rest bar 111 and the back rest center bar 10 form a back rest-like structure that supports the back of the user in the wheelchair position.

And in the rollator configuration the middle backrest bar 10 is located in front of the backrest position. As shown in FIGS. 7 and 8, the backrest position is such that the backrest rod 111 and the backrest middle rod 10 are both inclined toward the rear side of the wheelchair walker 100, as previously described. Whereas in the rollator position the backrest middle bar 10 is inclined with the front side in the backrest position, i.e. the backrest bar 111 is inclined towards the front side of the wheelchair rollator 100, whereby the backrest middle bar 10 is directed towards the front side of the wheelchair rollator 100, the upper rear position of the rollator can be left free in the rollator position, whereby the user can easily rest on the backrest bar 111 or the backrest middle bar 10 for supporting the user's body. The wheelchair walker 100 is free in the up and down direction at the back position to accommodate the user of the wheelchair walker 100.

The upper position of the walking aid is vacated in the state of the walking aid, so that the walking aid is convenient to use for walking, the gravity center of the walking aid is closer to the center of the walking aid, the limbs of the walking aid are convenient to use, and the safety is high. The position below the backrest position of the walking aid is free, the body of a user is convenient to use and is positioned in the space, the body is closer to the center of the walking aid, the user can stabilize the body, the supporting performance of the walking aid to the body of the user is improved, and the supporting force is more stable.

According to the wheelchair walking aid 100 provided by the embodiment of the invention, the two connecting rods 11 in at least one group of the supporting rod groups 1 are driven to rotate by adjusting the driving piece 4, so that the angle change between the linkage rod groups consisting of the connecting rods 11 is driven, the conversion between the wheelchair state and the walking aid state of the wheelchair walking aid 100 is realized, the distance between the front wheels 21 and the rear wheels 22 can be adjusted, and the wheelchair walking aid is convenient and quick. By adjusting the drive of the driving part 4, the walking aid state and the wheelchair state can be ensured to provide stable support for the user. When the walking aid is in a state, the upper position and the lower position of the backrest of the walking aid can be left, so that the body of a user is more close to the central position of the walking aid, the body of the user is more easily stabilized when the user uses the walking aid, and the body of the user is more stably supported by the walking aid.

In one embodiment of the present invention, the sitting plate 3 is movably or detachably connected to the sitting-bracing intermediate rod 20. Therefore, the angular rotation of the seat plate 3 can be realized, the seat plate 3 can be conveniently pivoted along with the state change of the wheelchair walker 100, and the wheelchair walker 100 is prevented from being influenced by the seat plate 3 in the process of switching the state. Or after the seat plate 3 is directly disassembled, the state change of the wheelchair walking aid 100 is convenient, and the replacement and the maintenance of the seat plate 3 at the later stage are also convenient.

In an embodiment of the present invention, as shown in fig. 3 and 4, the seat stay middle rod 20 is a "U" shaped rod, so that the lower surface of the seat plate 3 can be stably supported by the "U" shaped rod in the wheelchair state, and the seat plate 3 can be stably supported by the single seat stay middle rod 20, thereby preventing the seat plate 3 from deflecting under pressure to cause a safety hazard.

Further, as shown in fig. 1 to 8, on the same strut bar group 1, the front wheel 21 and the rear wheel 22 are connected to different links 11 so that the distance between the front wheel 21 and the rear wheel 22 is changed when the angle of the linkage bar group is changed. As described above, the rear wheels 22 are provided below the back support rod 111, and the front wheels 21 are provided on the links 11 of the support rod group 1 different from the rear wheels 22, so that stable support of the wheelchair walker 100 can be achieved, and movement of the wheelchair walker 100 can be ensured. Meanwhile, when the angle of the linkage rod group changes, the distance between the front wheel 21 and the rear wheel 22 can be adjusted, and it can be understood that when the wheelchair is in a wheelchair state, as shown in fig. 1-4, the distance between the front wheel 21 and the rear wheel 22 is larger, so that the stability and the safety of the wheelchair can be ensured, and the whole supporting surface of the lower part of the wheelchair is larger, and the safety performance is high.

As shown in figures 7 and 8, in the rollator state, the distance between the front wheels 21 and the rear wheels 22 is small, which facilitates the user's body to be close to the center of the rollator for the user's operation, and also facilitates the reduction of the turning radius of the rollator for the user to turn, and at the same time, the space required for turning is small.

As shown in fig. 2 and 7, a part of each of the plurality of links 11 constitutes an armrest, and armrests are provided on both sides of the seat plate 3. Therefore, a supporting position can be provided for the hand of the user, and the user can conveniently support the hand.

As shown in fig. 1 to 3 and 7, the plurality of links 11 of the support lever group 1 further includes: a first lower bar 113, a second lower bar 114, a third lower bar 115 and a fourth lower bar 116, wherein the rear end of the first lower bar 113 is connected with the rear wheels 22, i.e. the rear end of the first lower bar 113 is arranged at the rear part of the wheelchair walker 100, and the wheelchair walker 100 is supported at the rear part by the rear wheels 22. And the first lower bar 113 and the second lower bar 114 are arranged crosswise, that is, the first lower bar 113 and the second lower bar 114 can realize the crossed rotation, so as to form a structure similar to a scissor.

Two ends of the third lower rod 115 are respectively hinged to the rear ends of the first lower rod 113 and the second lower rod 114. The two ends of the fourth lower rod 116 are respectively hinged to the front ends of the first lower rod 113 and the second lower rod 114, and the lower end of the fourth lower rod 116 is connected with the front wheel 21. Thereby, both ends of the third lower bar 115 are rotatably connected to the rear ends of the first lower bar 113 and the second lower bar 114, respectively, and both ends of the fourth lower bar 116 are rotatably connected to the front ends of the first lower bar 113 and the second lower bar 114, respectively.

Further, the first lower bar 113, the second lower bar 114, the third lower bar 115 and the fourth lower bar 116 form a reverse four-bar linkage 11 mechanism, which can realize the distance adjustment between the front wheels 21 and the rear wheels 22 of the wheelchair walker 100. The adjustment drive 4 is connected to at least one link 11 in a reverse four-bar linkage 11 mechanism. Therefore, the wheelchair walking aid 100 can be quickly switched between the wheelchair state and the walking aid state, and is convenient and quick, and the switched wheelchair or walking aid has good structural stability and high safety.

Further, as shown in fig. 1, 3 and 4, a first intermediate bar 30 is connected between the first lower bars 113 of the two support bar sets 1, and the first intermediate bar 30 can connect the two first lower bars 113, thereby improving the stability between the two support bar sets 1.

As shown in fig. 1, 3 and 4, a second middle rod 40 is connected between the second lower rods 114 of the two support rod sets 1, and the two second lower rods 114 are connected through the second middle rod 40, so that the stability between the two support rod sets 1 is improved. The adjusting driving member 4 is a telescopic member 41, and two ends of the telescopic member 41 are respectively hinged on the first middle rod 30 and the second middle rod 40. Therefore, the telescopic piece 41 used as the adjusting driving piece 4 can stretch and contract to drive the first middle rod 30 and the second middle rod 40 to move relatively, so that the walking aid of the wheelchair walking aid 100 and the wheelchair state can be changed conveniently and quickly, and the telescopic piece 41 used as the adjusting driving piece 4 can effectively ensure the stability of the wheelchair state and the walking aid state.

As shown in fig. 1-3, the lower end of the back-rest rod 111 is hinged to the upper end of the third lower rod 115, one end of the sitting-support rod 112 is hinged to the back-rest rod 111, the other end of the sitting-support rod 112 is hinged to the first lower rod 113, and a first forward four-bar linkage 11 mechanism is formed among the back-rest rod 111, the third lower rod 115, the first lower rod 113 and the sitting-support rod 112.

Specifically, the lower end of the back rest lever 111 is hinged to the upper end of the third lower lever 115, i.e., the back rest lever 111 and the third lower lever 115 can rotate. One end of the sitting brace 112 is hinged with the backrest rod 111, and the other end is hinged with the upper end of the fourth lower rod 116, that is, the sitting brace 112 can rotate relative to the backrest rod 111 and the fourth lower rod 116. Therefore, the third lower rod 115, the backrest rod 111, the seat stay 112 and the fourth lower rod 116 are hinged to form a four-bar linkage 11 mechanism, namely, the movement between the first middle rod 30 and the second middle rod 40 can be adjusted through the adjusting driving piece 4, the overall movement of the reverse four-bar linkage 11 mechanism is realized, and the deformation of the lower part of the wheelchair walker 100 is driven. The first forward four-bar linkage 11 mechanism is driven to move by the reverse four-bar linkage 11 mechanism, thereby realizing the deformation of the upper part of the wheelchair walker 100.

The invention is not limited thereto, and in the wheelchair walker 100 of the embodiment of the invention, the distance adjustment of the front wheels 21 and the rear wheels 22 can also be realized by using a crisscross form. The distance adjustment of the front wheels 21 and the rear wheels 22 can also be realized by using a structure of a sliding pair.

As shown in fig. 1 to 3, the plurality of links 11 of the strut group 1 further includes: a first upper bar 117 and a second upper bar 118. The rear end of the first upper lever 117 is hinged on the back lever 111, and the first upper lever 117 is located below the back center lever 10 and above the seat plate 3 to constitute a grab bar. That is, the height position of the first upper bar 117 is intermediate between the height of the middle back bar 10 and the height of the seat plate 3, so that it can be used as an armrest to support a user in a wheelchair state. The upper end of the second upper rod 118 is hinged on the first upper rod 117, the lower end of the second upper rod 118 is hinged on the sitting support rod 112, and a second forward four-bar linkage 11 mechanism is formed among the backrest rod 111, the sitting support rod 112, the first upper rod 117 and the second upper rod 118.

Namely, the rotation of the first forward four-bar linkage 11 mechanism drives the rotation of the second forward four-bar linkage 11 mechanism, thereby realizing the integral deformation of the wheelchair walking aid 100. The whole structure is connected through a plurality of connecting rods 11, the deformation of the wheelchair walking aid 100 is realized by adjusting the driving force of the driving piece 4, and the wheelchair walking aid is convenient and quick and has a simple structure.

Therefore, when the reverse four-bar linkage 11 mechanism moves to change the distance between the front wheel 21 and the rear wheel 22, the grab bar rotates to automatically turn over the grab bar upwards or downwards, and the back bar 111 also turns over the back bar 111 along with the change of the distance between the front wheel 21 and the rear wheel 22.

In an embodiment of the present invention, as shown in fig. 5 and 6, the wheelchair walker 100 has a storage configuration, and when the wheelchair walker 100 is changed from the wheelchair configuration to the storage configuration, the back rest bar 111, the first upper bar 117, the second upper bar 118, the seat stay 112, and the first lower bar 113 are brought close to each other to be stacked.

That is, the wheelchair walker 100 is continuously moved from the wheelchair state to the walker state by adjusting the driving force of the driving member 4, so that the angles between the respective links 11 are reduced, that is, the back rest lever 111, the first upper lever 117, the second upper lever 118, the sitting stay 112, and the first lower lever 113 are drawn close to each other, thereby achieving that the reverse four-link 11 mechanism, the first forward four-link 11 mechanism, and the second forward four-link 11 mechanism are all contracted, achieving the folding of the wheelchair walker 100, reducing the space occupation thereof, and facilitating the storage of the wheelchair walker 100.

In one embodiment of the invention, the adjustment drive 4 is an electric push rod. The electric push rod can effectively improve the state conversion convenience of the wheelchair walking aid 100, and when the electric push rod extends or shortens, the transformation of the wheelchair walking aid 100 and the folding of the whole structure can be realized, so that the operation is convenient. Particularly, for the elderly users, the wheelchair walker 100 can be easily changed into a desired state without manual deformation.

In addition, in the wheelchair walker 100 according to the embodiment of the invention, the front wheels 21 can be universal wheels, so that the movement direction switching flexibility of the wheelchair walker 100 can be effectively improved. The rear wheels 22 of the wheelchair walker 100 may be provided with conventional rotatable wheels to save manufacturing costs. The rear wheels 22 can also use electric driving wheels, so that automatic walking can be realized in a wheelchair state, the operation is convenient, and time and labor are saved. And a certain walking aid power can be provided for the user through the electric driving wheel in the state of the walking aid.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A wheelchair walker, comprising:

the connecting rods of each group comprise backrest rods, the backrest rods of each group are connected through backrest middle rods, the connecting rods of each group comprise sitting support rods, the sitting support rods of each group are connected through sitting support rods, and the sitting support rods are located below the backrest middle rods;

the two groups of wheels are respectively connected to the two groups of support rods, each group of wheels comprises a front wheel and a rear wheel which are arranged in front and at the back, and the rear wheel is positioned below the backrest rod;

the seat plate is connected to the seat support middle rod;

the adjusting driving piece is connected with at least one supporting rod group so as to adjust the angle between two connecting rods in the connected supporting rod group; wherein the content of the first and second substances,

the adjusting driving piece is used for driving the wheelchair walking aid to be switched between a wheelchair form and a walking aid form, and the middle rod of the backrest is positioned at the position of the backrest when the wheelchair form is adopted; and the number of the first and second electrodes,

in the walker configuration, the backrest medial bar is positioned forward of the backrest position, and the wheelchair walker is free in the up-down direction at the backrest position to accommodate a user of the wheelchair walker.

2. The wheelchair walker of claim 1 wherein the seat plate is movably or removably attached to the seat stay intermediate bar.

3. The wheelchair walker of claim 1 wherein said front and rear wheels are connected to different said links on the same set of support rods so that the distance between said front and rear wheels changes as the angle of said set of links changes.

4. The wheelchair walker of claim 1 wherein a portion of the plurality of links of each set form armrests, the armrests being provided on either side of the seat plate.

5. The wheelchair walker of claim 1 wherein the plurality of links of the set of support rods further comprises:

the rear end of the first lower rod is connected with the rear wheel;

the first lower rod and the second lower rod are arranged in a crossed manner;

two ends of the third lower rod are respectively hinged to the rear ends of the first lower rod and the second lower rod;

two ends of the fourth lower rod are respectively hinged to the front ends of the first lower rod and the second lower rod, and the lower end of the fourth lower rod is connected with the front wheel;

the first lower rod, the second lower rod, the third lower rod and the fourth lower rod form a reverse four-bar linkage mechanism, and the adjusting driving piece is connected with at least one of the connecting rods in the reverse four-bar linkage mechanism.

6. The wheelchair walker of claim 5 wherein a first intermediate bar is connected between the first lower bars of both sets of support bars, a second intermediate bar is connected between the second lower bars of both sets of support bars, and the adjustment drive member is a telescopic member having both ends hinged to the first intermediate bar and the second intermediate bar, respectively.

7. The wheelchair walker of claim 5 wherein the back bar is hinged at its lower end to the upper end of the third lower bar, the sitting strut is hinged at one end to the back bar and at the other end to the first lower bar, and a first positive four-bar linkage is formed between the back bar, the third lower bar, the first lower bar and the sitting strut.

8. The wheelchair walker of claim 7 wherein the plurality of links of the set of support rods further comprises:

the rear end of the first upper rod is hinged to the backrest rod, and the first upper rod is positioned below the backrest middle rod and above the seat plate to form a grab rail;

the upper end of the second upper rod is hinged to the first upper rod, the lower end of the second upper rod is hinged to the sitting support rod, and a second forward four-bar mechanism is formed between the backrest rod, the sitting support rod, the first upper rod and the second upper rod.

9. The wheelchair walker of claim 8 having a stowed configuration, the backrest bar, the first upper bar, the second upper bar, the seat stay bar, and the first lower bar being brought together for stacking when the wheelchair walker is changed from the wheelchair configuration to the stowed configuration.

10. A wheelchair walker according to any one of claims 1-9 wherein the adjustment drive is an electric push rod.