KR101463242B1 - wheelchair - Google Patents

Abstract

According to the present invention, a wheelchair comprises: a main frame which has a seat on which a patient can sit; a pair of rear wheels installed in the main frame to be rotated; a front wheel installed in a support frame connected to the main frame; and an obstacle overcoming unit installed in one side of one among the main frame, the support frame, and a footboard installed in the support frame, and overcomes obstacles in front of the front or rear wheels. The obstacle overcoming unit includes: a guide member connected or separated to/from one side of one among the main frame, the support frame, and the footboard through coupling parts; at least one transfer body part transferred along the guide member; a lifting member installed in the transfer body part to be lifted, and supplies tractive force to the wheelchair when the wheelchair descends; and a lifting member drive part installed in the transfer body part, and lifts the lifting member to overcome the obstacles.

Description

Wheelchair having an obstacle overcoming unit < RTI ID = 0.0 > {wheelchair}

The present invention relates to a wheelchair, and more particularly, to a wheelchair having an obstacle-overcoming unit that enables an obstacle on the movement path to be easily overcome and moved when the wheelchair is seated.

In general, the elderly with disabilities who are uncomfortable with the disease, the disabled due to illness or accident, and the aged people are increasing due to the skeletal system degeneration. Wheelchairs are being used as a typical means of transportation for the elderly and the disabled.

The most important criterion among wheelchair comfort is that it perfectly matches the anatomical needs of the user. Even if anatomical demands are met, long-term use of the wheelchair by the elderly or handicapped (hereinafter referred to as the user) results in a physical impairment of the physical functions such as lowered locomotor activity, decreased bowel function, and deterioration of blood circulation. In addition, there is a risk of wound due to sitting.

On the other hand, when the wheelchair has a front wheel, that is, a front wheel for the direction has a caster ball shape and a rear wheel has a relatively large diameter, if there is an obstacle such as a relatively large obstacle, There is a problem that it is difficult to receive help from a carer. In particular, the caster ball constituting the front wheel must overcome obstacles initially located in the movement trajectory. However, the caster ball constituting the front wheel has a problem that the diameter of the wheel is relatively small and the overcoming of the obstacle is not smooth. Even if the helper of the handicapped pushes the wheelchair, it is not easy to overcome obstacles on the front wheel when moving. It is practically difficult to overcome an obstacle on the front wheel when the disabled person directly drives the rear wheel of the wheelchair.

 In view of this, the Korean Registered No. 092110 discloses a wheelchair capable of passing through obstacles such as stairs, and Patent Publication No. 2012-0140133 shows a wheelchair overcoming obstacles.

Obstacles Obstacles Published The wheelchair is equipped with an operating part mounted so that a wheelchair can cross a gap or a threshold; A control unit capable of controlling the operation unit; And a blocking unit that can block the movement of the control unit and the operation unit when the slope of the wheelchair exceeds the reference.

And patent registration No. 011439660 shows safety wheelchair with auxiliary wheels attached. A safety wheelchair having a posted auxiliary wheel is provided with driving means on a main frame, a drive shaft is coupled to the drive means, a gear portion is coupled to the drive shaft to transmit a force to the support frame by receiving force from the drive shaft, A support frame facing the front of the wheelchair is coupled to a lower portion of the support frame and a lower portion of the support frame is coupled to a lower portion of the support frame so that the height of the support wheel can be controlled by the movement of the support frame .

The conventional wheel chair as described above has a structure in which the auxiliary wheel is simply lifted and lowered, so that the front wheel can be lifted up to a level at which it can overcome an obstacle. However, since it has no moving power, There is a problem. And the structure is relatively complicated, so that it is difficult to improve the productivity.

In the patent registration No. 012335850, a wheelchair capable of hoisting obstacles is posted. In patent registration No. 10087020, a wheelchair is posted. The posted wheelchair has a damper mechanism for overcoming obstacles and steps, and a wheelchair It is posted. The wheelchair as described above has a structure that is simply raised and lowered to overcome an obstacle.

Disclosure of Invention Technical Problem [7] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a wheelchair capable of raising the front surface of a wheelchair and providing a traction force for overcoming an obstacle when the wheelchair is moved.

It is another object of the present invention to provide a wheelchair control apparatus and a wheelchair control apparatus capable of overcoming an obstacle of a wheelchair by moving an obstacle overcoming unit to a position where an obstacle exists in a wheelchair wheel overcoming an obstacle, In the wheelchair.

Another object of the present invention is to provide a wheelchair having an obstacle-overcoming unit that can easily overcome an obstacle by the driving force of the rear wheel and the traction force of the obstacle-overtaking unit when the obstacle is driven by driving the rear wheel.

According to an aspect of the present invention, there is provided a wheelchair having an obstacle avoidance unit,

A front wheel provided on a support frame connected to the main frame, a main frame, a support frame, and a support frame, And an obstacle overcoming unit provided on a selected one of the foot plates installed on the vehicle, and capable of overcoming the obstacles of the front wheel or the rear wheel,

Wherein the obstacle-overtaking unit includes a guide member that is engaged with and separated from a selected one of the main frame, the support frame, and the foot plate by a coupling portion, at least one conveying main body portion conveyed along the guide member, And an elevating member driving unit installed on the conveying body to elevate the elevating member in order to overcome the obstacle.

In the present invention, a first auxiliary wheel is provided at a lower end portion of the elevating member, and the auxiliary wheel is provided with a first one-way clutch allowing rotation only in a direction in which the wheelchair advances. Further, an obstacle protruding bar for overcoming an obstacle having a predetermined height, such as a stairway, is further provided on the front side of the elevating member, a second auxiliary wheel is installed on the obstacle protruding bar, Way clutch can be rotated.

The elevating member driving unit includes a rack gear formed at one side of the elevating member in the longitudinal direction of the elevating member and a pinion meshed with the rack gear and driven by a driving motor provided at the conveying body. Further, the conveying body portion is further provided with a guide portion for guiding the lifting and lowering of the elevating member in the longitudinal direction.

The guide member may further include a feed driving unit for moving the feed main body part forward and backward along the guide member.

The front wheel and the rear wheel of the wheelchair having the obstacle-overcoming unit of the present invention can easily overcome obstacles provided on the moving road surface and can pull the wheelchair in the process of overcoming the obstacle. In order to prevent overcoming of the obstacle preventing the progress of the front wheel or the rear wheel, it is easy to overcome the obstacle because the position of the main body of the obstacle can be changed.

1 is a perspective view of a wheelchair having an obstacle-overcoming unit according to the present invention,
FIG. 2 is a perspective view illustrating an obstacle-overcoming unit according to the present invention,
3 is a partially cutaway perspective view of the elevating member driving unit according to the present invention,
4 is a cross-sectional view of the elevating member driving unit shown in Fig. 3,
5 is a side view of the obstacle-
6, 8, and 10 are side views showing an operating state of a wheelchair provided with an obstacle-overcoming unit,
Fig. 7, Fig. 9, Fig. 11 and Fig. 11 are side views showing the operating state of the obstacle-overcoming unit according to the present invention;
12 is a perspective view showing a state in which the obstacle-overcoming unit according to the present invention is installed on the rear wheel side,
Fig. 13 is a side view showing a state in which the rear wheel is over the obstacle by the obstacle-overcoming unit,
FIG. 14 is a view showing another embodiment of a wheelchair equipped with an obstacle-overcoming unit according to the present invention; FIG.

A wheelchair according to the present invention can lift a front surface of a wheelchair and provide a pulling force to a wheelchair to overcome an obstacle. An embodiment of the wheelchair is shown in FIG. 1 to FIG.

Referring to the drawings, a wheelchair 20 according to the present invention includes a main frame 22 having a basic skeleton sheet 21 on which a seat 21 can be seated, A front wheel 27 and a rear wheel 27 installed on a support frame 26 connected to the main frame 22 and the rear wheels 23 and 24 installed on the main frame 22 or the support frame 26, And an obstacle overcoming unit (50) capable of overcoming the obstacles of the front wheel or the rear wheel.

The main frame 22 may include first and second wheel mounting frames 22a and 22b installed parallel to each other and to which the rear wheels 23 and 24 are mounted and connection frames 23 connecting the first and second wheel mounting frames 22a and 22b. Here, the connection frame 23 may be foldable so that the connection frame may be formed in the shape of a pentagram.

The first and second support frames 26a and 26b forming the support frame 26 are installed on the front surfaces of the first and second wheel mounting frames 22a and 22b, And front wheels 27 and 28, which are caster balls, are provided at the ends of the front wheels 26a and 26b, respectively. In addition, the first and second support frames 26a and 26b may be provided with footrests 29 capable of walking on the wheelchair. The foot plates 29 may be rotatably mounted on the first and second support frames 26a and 26b, respectively. Although not shown in the drawing, a separate driving motor for driving the rear wheels may be installed in the main frame. The main frame and the first and second support frames are not limited to the above-described embodiments, and may be formed in various shapes according to the wheelchair. For example, the front wheels 27 and 28 may be positioned on both sides of the front side of the foot plate 29. [

The obstacle-overcoming unit 50 may be arranged so that when an obstacle is located on at least one side of the rear wheels 23, 24 or the front wheels 27, 28 in the process of moving the wheelchair, And can be provided with a traction force at the same time as lifting up, as shown in Figs. 1 to 5. Fig.

An obstacle overcoming unit 50 includes a guide member 51 coupled to at least one of the main frame 22 or the support frame 26 and the foot plate 29 and coupled and separated by the engaging portion 70, A conveying body 52 which is conveyed by the conveying driving unit 80 along the guide member 51 and a conveying unit 52 which is supported by the conveying body 52 and is capable of being raised and lowered so as to pull the wheelchair And an elevating member driver 90 for pulling the elevating member 60 in and out of the elevating member 60 and the elevating main body 52.

The guide member 51 may be formed of a steel bar, and at least two bars may be installed parallel to each other. In this case, it is preferable that two bars provided parallel to each other pass through the conveying main body portion 52 so that the conveying main body portion 52 can be guided.

The engaging portion 70 is capable of engaging and disengaging the guide member 51 with respect to the main frame 22, the support frame 26 and the foot plate 29 and is provided on the rear end side of the guide member 51 Upper and lower bracket portions 71 and 72 extending upward and downward to form an insertion portion into which the foot plate 29 is inserted and fixing portions 73 and 72 for fixing the upper and lower bracket portions 71 and 72 to the foot plate . The fixing portion 73 may be composed of upper and lower bracket portions 71 and 72 and a pin 74 passing through the foot plate 29. The upper and lower bracket portions 71 and 72 and the foot plate 29, (29) may be formed with a through hole into which a pin is inserted. Here, the lower bracket portion 72 positioned on the lower side of the upper and lower bracket portions 71 and 72 may be longer. The fixing part 73 may be composed of a toggle clamp, a bolt and a nut. The upper bracket part 71 is rotatably supported by the lever so that the stepping part 29 positioned between the upper and lower brackets 71, And an eccentric cam (not shown) for fixing the camshaft. In order to fix the guide member 51 to the support frame 26 or the main frame 22, the fixing portion 73 may have a coupling groove 75 formed on both sides of the guide member 51, The member 51 may be further provided with a clamp (not shown) for preventing the support frame 26 or the main frame 2 from being detached from the defect groove 75.

The engaging portion 70 is not limited to the above-described embodiment and may be a structure in which the guide member 51 can be fixed to a selected one of the main frame 22, the support frame 26, It is possible.

The feed main body part 52 can be reciprocated in the longitudinal direction to the guide member 51 by a feed drive part 80 that feeds the feed main body part 52 along the guide member 51, A conveyance rack 81 mounted on the lower surface of the guide member 51 and a motor 83 driven by a motor 83 provided on the conveyance body 52 and engaged with the conveyance rack 81, And a pinion 82. The conveying rack 81 may be integrally formed in the longitudinal direction on the lower surface of the guide member 51 or may be separately manufactured and attached to the guide member 51. The motor 83 preferably uses a geared motor provided with a speed reducer to increase the rotation torque according to the driving of the motor.

The conveyance drive unit 80 is not limited to the above-described embodiments, but may be a timing belt supported by a drive wheel and a driven wheel provided on both sides of the guide member 51, one side of which is coupled to the conveyance body, And a driving motor that is supported and rotates the driving wheel in normal and reverse directions.

The conveying body 52 conveyed by the conveyance driving unit 80 to the guide member 51 is conveyed to the left and right along the guide member 51 to select the lowering position of the elevating member 60 And an elevating member driving unit 90 for elevating and lowering the elevating member 60 are provided.

3 and 4, the lifting and lowering driving unit 90 is formed with a guide groove 91 having an open front face of the conveying body 52, The rollers 92 and 93 are rotatably mounted and the corresponding side surfaces of the elevating member 60 are supported by the guide rollers 92 and 93 and guided by the guide grooves 94 and 95 . In the posture holding recesses 94 and 95, a linear bearing may be installed to reduce frictional force when the elevating member is moved up and down.

When the obstacle is caught by the front wheel or the rear wheel of the wheelchair and the advancement of the wheelchair is difficult, the elevator member driving unit 90 includes a vertical part 61 and a curved part 62, And a lifting and lowering pinion 98 which is driven by a driving motor 97 provided on the feeding main body portion 52 is provided on the side surface of the lifting rack 96 in the longitudinal direction. Two or more guide rollers 92 and 93 inserted into the attitude maintaining grooves 94 and 95 to maintain the attitude of the elevating member 60 are vertically provided so that when the elevating member is moved to the curved surface portion, .

A first auxiliary wheel 101 is installed at a lower end of the elevating member 60. The auxiliary wheel 101 is provided with a first one-way clutch that allows rotation only in a direction in which the wheelchair advances. An obstacle protruding bar 63 for overcoming an obstacle having a predetermined height such as a step is installed on the front side of the elevating member 60. The end of the obstacle protruding bar 63 is provided with a length It is preferable to be able to adjust the height so as to be moved and fixed in the direction A second auxiliary wheel 102 is installed at an end of the obstacle protruding bar 63. The second auxiliary wheel is also provided with a second way wheel clutch so that the second auxiliary wheel is rotated only in the direction of movement of the wheelchair. The obstacle protruding bar 63 may have a plurality of engaging holes provided at a predetermined distance on the front side of the elevating member 60 and a coupling screw may be provided on the base of the obstacle protruding bar to engage with the engaging hole. When the second auxiliary wheel is not installed on the obstacle protruding bar 102, an impact absorbing pad (not shown) is installed at an end of the obstacle protruding bar, and an obstacle sensing The obstacle sensing unit may further include a proximity sensor or a water light emission sensor. And a control unit 210 for controlling the elevation member driving unit 90 and the conveyance driving unit 80 based on a signal detected by the obstacle detection unit 200. A battery 220 for supplying power to each motor is installed.

12 and 13, when the obstacle is located on the movement trajectory of the rear wheel 23 or 24 on one side, the obstacle-overcoming unit 50 is provided with the front main The water-overcoming unit 50 is installed on the foot plate 29 and the rear wheel 23 or 24 (see Fig. 14) is installed on the foot plate 29 to overcome the obstacle struck by the current 27 The front main frame 22 may be installed on the front main frame 22 in order to overcome obstacles interfered with the main frame 22.

The operation of the wheelchair according to the present invention constructed as described above will be described below.

When the obstacle prevents the front wheels 27 and 28 of the relatively small obstacle from proceeding in the process of moving the wheelchair according to the present invention, the forwarding drive unit 80 advances the forwarding main body unit 52 by the obstacle Is moved to the difficult front wheel side (front wheel side caught by the obstacle). This driving can be performed by the conveyance motor 83 installed in the conveying main body portion 52 being driven to rotate the conveying pinion 82 so that the conveying pinion 82 is conveyed along the conveying rack 81 engaged with the conveying motor 83.

When the position is moved as described above, the driving motor 97 of the elevation member driving unit 90 is rotated and the conveyance rack 96 is conveyed by the elevation pinion 98, so that the elevation member 60 is lowered And the obstacle can be overcome by lifting one side of the wheelchair.

When the elevating member 62 is engaged with the elevating pinion 83 on the curved portion 62 through the linear portion 61 in the course of the above process, A pulling force is generated to pull the wheelchair. At this time, since the first one-way clutch is provided on the driving unit side of the auxiliary wheel, the first auxiliary wheel 101 can be prevented from rotating in the reverse direction. This action can overcome obstacles that are not relatively high.

When an obstacle is detected by the obstacle detection unit in the case where there is a barrier such as a sidewalk block as an obstacle on the front surface, the front surface of the elevation member 60 is brought into close contact with the front surface of the obstacle as shown in FIGS. So that the obstacle protruding bar 63 is located on the vertically upper side of the obstacle 300. [

In this state, the lift member 60 is lowered by the lift member driving unit 90 as described above. In this way, the obstacle protruding bar 63 is brought into contact with the upper surface of the barrier when the vertical section of the elevating member 60 moves the moving unit. In this state, the obstacle protruding portion 63 is raised at an arbitrary angle while the elevation member 60 moves on the curved surface portion 62, and the front surface of the wheelchair is heard. Therefore, the wheelchair is pulled by the obstacle protruding bar 63, and the front wheels 27 and 28 enter the obstacle (barrier). In this state, the disabled person can advance the wheelchair by rotating the rear wheels 23 and 24 to overcome the obstacle. When the obstacle is overcome as described above, the control unit controls the driving motor of the elevating member driving unit 90 to raise the elevating member 60.

13, the transfer main body 52 of the obstacle-overcoming unit installed on the main frame 22 with an obstacle on the rear wheel side is transferred to the wheel side with the obstacle as a sole, The lifting member transfer unit 90 is used to lower the rear wheel side of the wheelchair, thereby raising the rear wheel side of the wheelchair, and at the same time, it is possible to overcome the obstacle of the rear wheel by regulating the light engaging force. When the obstacle of the rear wheel 23 or 24 is relatively large, the obstacle on the rear wheel side can be overcome by using the obstacle protruding bar as described above.

As described above, the obstacle caught by the front wheel or the rear wheel of the wheelchair according to the present invention can be easily overcome by raising and lowering one side of the wheelchair by raising and lowering the elevating member 60 and pulling it. Disabled people can overcome obstacles and advance wheelchair without help from assistant.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the scope of the invention.

Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

The wheelchair of the present invention can be widely applied to devices for movement of various kinds of wheelchairs and electric wheelchairs.

Claims (5)

A front wheel provided on a support frame connected to the main frame, a main frame, a support frame, and a support frame, And an obstacle overcoming unit provided on a selected one of the foot plates installed on the vehicle, and capable of overcoming the obstacles of the front wheel or the rear wheel,
Wherein the obstacle-overtaking unit includes a guide member that is engaged with and separated from a selected one of the main frame, the support frame, and the foot plate by a coupling portion, at least one conveying main body portion conveyed along the guide member, And an elevating member driving unit installed on the conveying body to elevate the elevating member in order to overcome the obstacle,
A first auxiliary wheel is provided at a lower end portion of the elevating member, and the auxiliary wheel is provided with a first one-way clutch allowing rotation only in a direction in which the wheelchair advances,
The obstacle protruding bar for overcoming an obstacle having a predetermined height is installed on the front side of the elevating member, a second auxiliary wheel is installed on the obstacle protruding bar, and the second auxiliary wheel is rotatable in the advancing direction of the wheelchair And a second one-way clutch is provided. delete delete A front wheel provided on a support frame connected to the main frame, a main frame, a support frame, and a support frame, And an obstacle overcoming unit provided on a selected one of the foot plates installed on the vehicle, and capable of overcoming the obstacles of the front wheel or the rear wheel,
Wherein the obstacle-overtaking unit includes a guide member that is engaged with and separated from a selected one of the main frame, the support frame, and the foot plate by a coupling portion, at least one conveying main body portion conveyed along the guide member, And an elevating member driving unit installed on the conveying body to elevate the elevating member in order to overcome the obstacle,
The elevating member driving unit includes a rack gear formed at one side of the elevating member in the longitudinal direction of the elevating member and a pinion meshing with the rack gear and driven by a driving motor provided in the conveying body portion, Further comprising a guide portion for guiding the lifting and lowering of the elevating member. The method according to claim 1,
Wherein the elevating member has a straight portion provided with a first auxiliary wheel at an end thereof and a curved portion extending from the straight portion and providing a pulling force to the wheel chair when the wheel is lowered.

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