KR101885157B1 - Folding wheelcharir - Google Patents

Abstract

The foldable wheelchair according to the present invention comprises a saddle for supporting the body of a passenger, a backrest hinged to the saddle by being hinged to be folded, a side frame part provided on both sides of the saddle, A main wheel that is rotatably coupled to the side frame portion and is detachably attached to the wheel attachment portion, a footrest portion that supports the foot of the passenger, and a guide tube portion that is formed on the inside of the saddle A front moving frame attached to the side frame so as to move to the main wheel side during a lever operation and connected to a motor unit mounted on the side frame so as to be in close contact with the outer circumferential surface of the main wheel, A power switch portion, an armrest portion mounted on a side surface of the backrest portion, and an armrest portion, It includes the sub-power conversion unit joystick providing the movement signal.

Description

Folding wheelchair {FOLDING WHEELCHARIR}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electric wheelchair, and more particularly, to a foldable wheelchair which is manufactured in a light weight, folded to facilitate storage and movement,

A wheelchair is a portable chair developed for the movement of persons with disabilities or the elderly. Conventionally, a wheelchair is moved by manipulating a large wheel installed on both sides of the saddle, or a protector or the like is pushed from behind.

In the case of the hand-operated wheel chair, since the patient must roll the wheel by hand, the patient's physical power consumption is large and the patient's hand is injured. To solve these problems, electric wheelchairs have been developed.

Korean Patent No. 10-1075444 (electric wheelchair) is a method in which a passenger moves a motor by driving a motor since a motor is provided at the rear. However, the conventional electric wheel chair has a problem that the convenience of movement is reduced due to an excessive weight.

In the case of an LPG vehicle used as a disabled person, a gas cylinder is installed in a trunk space, and thus an electric wheelchair can not be moved to a vehicle.

In addition, because the space is narrow and the space is frequent, the electric wheelchair is more difficult to travel than usual, and the weight is too heavy, which can lead to a serious accident in case of malfunction.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a foldable wheelchair that is light in weight, easily foldable for easy storage, and capable of manual and automatic power conversion.

In order to solve the above problems, the present invention provides a foldable wheelchair comprising: a saddle supporting a body of a passenger; A backrest hinged to the saddle so as to be folded in the saddle direction; A side frame portion provided on both sides of the saddle and having a wheel attachment portion; A secondary wheel frame rotatably coupled to the side frame portion and having a secondary wheel mounted thereto; A main wheel detachably attached to the wheel attachment portion; A footrest supporting the foot of the occupant; A front moving frame formed to move along a guide tube formed on the inner side of the saddle and having a receiving part formed at one end thereof so as to be coupled to the footrest; A power switching unit attached to the side frame and driven to move to the main wheel side when the lever is operated, and a rotating roller connected to the mounted motor unit is driven to come into close contact with the outer circumferential surface of the main wheel; An armrest mounted on a side surface of the backrest; And a joystick mounted on the armrest portion and providing a direction movement signal to the auxiliary wheel or the power switching portion, wherein the side frame portion is formed in a hollow tube shape to rotate the auxiliary wheel frame, The backrest is folded toward the upper surface side of the saddle when the wheelchair is folded, and the front moving frame is moved inside the guide tube portion to move the footrest portion The auxiliary wheel frame rotates inward from the outside of the side frame part, and the auxiliary wheel side is folded.

Wherein the power switching portion includes the lever, the motor, and the rotating roller, the mounting portion being mounted to the side frame portion; A lever connection portion coupled to a side surface of the mounting portion such that the lever rotates; A coupling bar coupled at one end to the lever connection portion and coupled to the other end of the rotation roller; And a connection bar moving part coupled between the lever connection part and the connection bar to move the connection bar when the lever is moved.

The footrest is detachably attached to the front moving frame, and includes a battery for supplying power, at least one motor rotating by the power of the battery, and a controller for sensing the pressure applied to the feet of the occupant, And at least one sensor for sensing the temperature.

The side frame part or the auxiliary wheel frame may be coated with an aluminum or aluminum alloy pipe prepreg so as to strengthen the strength and reduce the weight.

The present invention also provides a foldable wheelchair comprising: a saddle supporting a body of a passenger; A backrest hinged to the saddle so as to be folded in the saddle direction; A side frame portion provided on both sides of the saddle and having a wheel attachment portion; A main wheel detachably attached to the wheel attachment portion; A footrest supporting the feet of the passenger and having a battery for supplying electric power and auxiliary wheels installed therein and provided with at least one motor rotated by the power of the battery to provide power to the auxiliary wheels; A front moving frame formed to move along a guide tube formed on the inner side of the saddle and having a receiving part for receiving and releasing the leg support part at one end; An armrest mounted on a side surface of the backrest; And a joystick mounted on the armrest portion and providing a direction movement signal to the footrest portion. When the wheelchair is folded, the backrest is folded toward the upper surface side of the saddle, And the footrest portion is moved inward to move the footrest portion.

The foldable wheel chair according to the embodiment of the present invention is advantageous in that it can be easily folded and stored for easy removal after removal of the main wheel.

In addition, the main constituent part is formed of a carbon composite material, which is light in weight and excellent in strength.

The foldable wheel chair according to the embodiment of the present invention may be equipped with a power converting unit that provides power to perform both automatic driving and manual driving.

1 is a perspective view of a foldable wheelchair according to an embodiment of the present invention;
FIG. 2 is a perspective view showing the foldable wheelchair shown in FIG. 1 in a folded state; FIG.
3 is a perspective view for explaining the power switching unit shown in Fig.
Fig. 4 is a perspective view showing the position of a rotating roller when the lever of the power switching unit shown in Fig. 3 is at position A. Fig.
5 is a perspective view showing the position of a rotating roller when the lever of the power switching unit shown in FIG. 3 is at position B. FIG.
6 is a perspective view of a foldable wheelchair according to another embodiment of the present invention;
7 is a perspective view of a foldable wheelchair according to another embodiment of the present invention;

Hereinafter, the description of the present invention with reference to the drawings is not limited to a specific embodiment, and various transformations can be applied and various embodiments can be made. It is to be understood that the following description covers all changes, equivalents, and alternatives falling within the spirit and scope of the present invention.

In the following description, the terms first, second, and the like are used to describe various components and are not limited to their own meaning, and are used only for the purpose of distinguishing one component from another component.

Like reference numerals used throughout the specification denote like elements.

As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise. It is also to be understood that the terms " comprising, "" comprising, "or" having ", and the like are intended to designate the presence of stated features, integers, And should not be construed to preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Hereinafter, embodiments of the present invention will be described in detail with reference to FIGS. 1 to 7 attached hereto.

FIG. 1 is a perspective view showing a foldable wheelchair according to an embodiment of the present invention, and FIG. 2 is a perspective view showing a foldable wheelchair shown in FIG. 1 in a folded state.

1 and 2, a foldable wheelchair 100 according to an embodiment of the present invention includes a saddle 120, a backrest 110, a side frame portion 130, a wheel attachment portion 136, The auxiliary wheel frame 140, the main wheel 180, the footrest 160, the front moving frame 150, the power switching unit 200, the armrest unit 170, and the joystick unit 190 .

Specifically, the saddle 120 supports the body of the occupant. At this time, the occupant may be a patient having an injury such as a leg or an arm, and the saddle may be provided with a cushion or the like so that the occupant can be comfortably supported.

A guide tube 122 may be formed in the saddle 120 to allow the front moving frame 150 to move.

The guide tube portion 122 may have a pipe structure in the form of a hollow tube embedded in the saddle 120 or a hollow tube may be formed inside the saddle 120 when the saddle 120 is manufactured. The guide tube portion 122 may be provided with two hollow tubes arranged in parallel so that the front moving frame 150 is moved.

A locking device for fixing the state of the front moving frame 150 may be further provided at an end of the guide tube portion 122. The locking device may include a locking pin formed to penetrate the guide tube portion 122 and inserted into a hole or groove formed in the front moving frame 150 so that the front moving frame 150 is fixed to the guide tube portion 122 . At this time, it is preferable that holes or grooves are formed at both ends of the front moving frame 150, respectively.

The backrest 110 is installed so as to stand on the rear surface of the saddle. At this time, the backrest 110 is hinged to be folded toward the upper surface of the saddle 120 so that the wheelchair can be easily moved or stored.

A locking device or the like may be formed on the hinge-connecting portion of the backrest 110 and the saddle 120 to maintain the state of the backrest 110. That is, when the backrest 110 is standing on the saddle 120, the locking device operates to maintain the standing state. At this time, the locking device is released to fold back the backrest 110, and the backrest 110 is brought into close contact with the saddle 120 side. When the backrest 110 is in close contact with the saddle 120, the locking device operates to maintain the state of the backrest 110.

The locking device may be formed at the hinge coupling portion, and may be fixed using a fixing pin or a combination of a gear and a release button.

The side frames 130 are fixed to both sides of the saddle 120. The side frame part 130 may include a support pipe 132 having an inner hollow pipe shape and at least one connection frame 134 and a wheel coupling part 136 to which the main wheel 180 is coupled have.

The support pipe 132 is formed of a material such as aluminum or an aluminum alloy, and is formed by coating a carbon composite material, for example, a prepreg, on the outside or inside to reduce weight and secure rigidity.

The connection frame 134 may be made of the same material as the support pipe 132. At this time, the connection frame 134 is formed in the same shape as the support pipe 132 and can be coupled between the saddle 120 and the support pipe 132.

The wheel engagement portion 136 is coupled with a plate-like structure in a space between the support pipe 132 and the saddle 120. The wheel coupling portion 136 may be provided with a mounting hole 138 to allow the main wheel 180 to be mounted and rotated.

The auxiliary wheel frame 140 is rotatably coupled to the side frame portion 130, and the auxiliary wheel 144 is mounted. The auxiliary wheel frame 140 may be provided with a tubular frame to be inserted into the support pipe 132. The auxiliary wheel 144 is mounted on one end of the auxiliary wheel frame 140.

The auxiliary wheel frame 140 is provided with a hinge portion 142 so that the auxiliary wheel 144 can be folded outward when the wheelchair is folded.

The main wheel 180 is formed to have a large diameter such as a wheel used in an ordinary wheelchair. The main wheel 180 is formed of an air blow molding method and a carbon composite material for weight reduction. As shown in FIG. 1, the main wheel 180 is formed as a three-spoke type so that the weight of the main wheel 180 can be reduced while reinforcing strength by using a carbon composite material.

The footrest portion 160 is formed to support the foot of the passenger. The footrest portion 160 is coupled to the front moving frame 150 and is formed to be detachable. That is, the footrest portion 160 is detachably formed so that it can be compatible with a device equipped with the power means.

A carbon composite material may also be used for the footrest 160 to reduce weight and increase strength.

The front moving frame 150 is formed to have a thickness corresponding to the inner diameter of the guide tube portion 122 so as to move along the guide tube portion 122. Also, the front moving frame 150 may be formed in a streamlined shape. At this time, the guide tube portion 122 is also preferably formed in a streamlined shape. The front movable frame 150 may be a carbon composite material, as described above, to reduce weight and increase strength.

The front moving frame 150 may be formed with a receiving portion 152 to receive the footrest portion 160. The pedestal engaging portion 152 allows the pedestal portion 160 to be engaged, and after the engaging, the pedestal portion 160 is fixed.

The armrest portion 170 is formed to be rotatable on both sides of the backrest 110. The armrest portion 170 is rotatably mounted and rotated in one direction when the wheelchair is to be folded.

The joystick portion 190 is installed on the armrest portion 170. The joystick unit 190 may provide a direction movement signal to the auxiliary wheel 144 or a power switching unit 200 described later.

The power switching portion 200 is attached to the side frame portion 130. The power switching unit 200 operates the lever 220 to move the rotating roller 240 mounted on the main wheel 180 side. At this time, the rotating roller 240 is connected to the motor unit 250 to transmit the rotational force of the motor unit 250 to the main wheel 180. The rotation roller 240 is brought into close contact with the outer circumferential surface of the main wheel 180 to transmit rotational force to the main wheel 180.

The power switching unit 200 may be formed in a detachable manner so as to be mounted on a hand-held wheel chair.

The power switching unit 200 will be described with reference to FIGS. 3 to 5. FIG.

2, in the foldable wheel chair according to the embodiment of the present invention, when the wheelchair is folded, the backrest 110 is folded toward the upper surface side of the saddle 120. As shown in FIG. The front moving frame 150 moves to the inside of the guide tube portion 122 to move the footrest portion 160. The auxiliary wheel frame 140 rotates in the inward direction from the outside of the side frame portion 130 and is folded by the hinge portion 142 formed on the side of the auxiliary wheel 144. [

When the wheelchair is unfolded, the operation is reversed.

FIG. 3 is a perspective view showing the power switching unit shown in FIG. 1, FIG. 4 is a perspective view of a foldable wheelchair showing a state where the lever of FIG. 3 is at the A position, Fig. 3 is a perspective view of a folding wheelchair shown in Fig.

3 to 5, the power switching unit 200 includes a mounting portion 210, a lever 220, a rotating roller 240, a motor portion 250, a connecting bar 230, a lever connecting portion 260, And a connection bar moving unit 270.

Specifically, the mounting portion 210 may support the lever 220, the rotating roller 240, the motor portion 250, the connecting bar 230, the lever connecting portion 260, and the connecting bar moving portion 270, A mounting groove 212 may be formed on one side of the support frame 132 so as to be mounted on the support pipe 132 of the side frame portion 130. The mounting groove 212 may be formed in a shape corresponding to the shape of the side frame part 130. The mounting groove 212 may be formed in the shape of a pipe having one side opened as shown in FIG. However, the shape of the mounting groove 212 is not limited to this, and any shape that can be coupled to the support tube 132 of the side frame portion 130 is possible.

The lever 220 is coupled to the rotating roller 240 to move the rotating roller 240 to the main wheel 180 side of Figure 1 or to rotate the rotating roller 240 in close contact with the main wheel 180 to the main wheel 180 . The lever 220 is formed in a rod shape and is installed so that the passenger or the user can change directions.

The rotating roller 240 is formed of a material such as urethane or engineering plastic. It is preferable that the rotating roller 240 is brought into contact with the surface of the main wheel 180 which touches the floor. At this time, the rotating roller 240 may be recessed inward to increase the contact area between the rotating roller 240 and the main wheel 180.

The motor unit 250 may be configured to engage with the rotating roller 240 to provide rotational force to the rotating roller 240. The motor unit 250 may be a BLDC motor or the like. The motor unit 250 may be driven according to a control signal provided from the joystick unit 190. The motor unit 250 is rotatable in forward and reverse directions, and a speed reducer is mounted.

The lever connection portion 270 is coupled to one side of the mounting portion 210. At this time, the lever connection part 270 is coupled with the lever 220 and the connection bar 230. The end of the lever 220 connected to the lever connection portion 270 is installed to rotate at a predetermined angle, and the connection bar 230 is also installed to rotate at a predetermined angle.

One end of the connecting bar 230 is coupled to the lever connecting portion 270 and the other end of the connecting bar 230 is coupled to the rotating portion 240 and the motor portion 250.

The connecting bar moving part 270 is coupled between the lever 220 and the connecting bar 230 so that the connecting bar 230 can be moved when the lever 220 is moved. That is, as shown in FIG. 3, when the lever 220 moves to the A position, the connecting bar 230 is moved so that the rotating roller 240 moves to the position A '. Further, when the lever 220 moves to the B position, the connecting bar 230 is moved so that the rotating roller 240 moves to the B 'position.

As shown in FIG. 4, when the lever 220 is at the A position, the rotary roller 240 is positioned in close contact with the main wheel 180. 5, when the lever 220 is in the B position, the rotary roller 240 is detached from the main wheel 180. As shown in FIG.

1 to 5, the power switching unit 200 may transmit the power of the motor unit 250 to the main wheel 180 to automatically move the manually-operated wheelchair. Further, when the passenger or the user operates the lever to separate the rotating roller 240 from the main wheel 180, the wheelchair can be operated manually.

6 is a view illustrating a foldable wheelchair according to another embodiment of the present invention.

6 is different from that of Fig. 1, except that the rest of the components are the same. Therefore, description of the same constituent elements will be omitted.

Referring to FIG. 6, the footrest 300 may have wheels and self-power. In addition, the footrest 300 can be provided with sensor means such as a gyro sensor or a pressure sensor to perform wheelchair operation control such as direction change or forward / backward movement. The footrest part 300 is equipped with a battery and can supply power to the sensors and the motor.

For example, a passenger on a wheelchair may not be able to operate the joystick unit 190. In this case, since the use of the power switching unit 200 is not easy, the footrest 300 shown in Fig. 6 is used.

The footrest 300 shown in FIG. 6 is formed such that two portions of the footrest 300, which the passenger touches, are separated from each other. Each footrest is provided with a gyro sensor, which generates a driving force on the wheel in accordance with the position change of the occupant's foot.

7 is a perspective view illustrating a foldable wheelchair according to another embodiment of the present invention.

FIG. 7 includes the same components as those of FIG. 6, except that a power switch is not provided and a joystick is added. Therefore, redundant description of the same constituent elements will be omitted and differences will be described.

As shown in FIG. 7, the footrest 300 may have a wheel portion and self-power. The footrest 300 may be provided with a battery to supply power to a motor or the like provided therein. At this time, the footrest 300 may be connected to the joystick 190 by wire or wirelessly.

When the control signals from the front, back, right, and left sides are inputted into the joystick 190, the wheelchair can be controlled through the wheels provided in the footrest 300 and the motor.

As described above, the foldable wheel chair according to the embodiment of the present invention is advantageous in that it can be easily folded and stored for easy removal after the main wheel is removed.

In addition, the main constituent part is formed of a carbon composite material, which is light in weight and excellent in strength.

The foldable wheel chair according to the embodiment of the present invention may be equipped with a power converting unit that provides power to perform both automatic driving and manual driving.

100: Foldable wheelchair
110: Backrest
120: Saddle
130:
140: Auxiliary wheel frame
150: front movement frame
160:
170: armrest portion
180: Main wheel
190: Joystick part
200: Power switching section

Claims (5)

As a foldable wheelchair,
A saddle supporting the occupant's body;
A backrest hinged to the saddle so as to be folded in the saddle direction;
A side frame portion provided on both sides of the saddle and having a wheel attachment portion;
A secondary wheel frame rotatably coupled to the side frame portion and having a secondary wheel mounted thereto;
A main wheel detachably attached to the wheel attachment portion;
A footrest supporting the foot of the occupant;
A front moving frame formed to move along a guide tube formed on the inner side of the saddle and having a receiving part formed at one end thereof so as to be coupled to the footrest;
A power switching part attached to the side frame part and driven to move toward the main wheel side when a lever is operated and a rotating roller connected to the mounted motor part is driven to come into close contact with the outer circumferential surface of the main wheel;
An armrest mounted on the backrest side; And
And a joystick mounted on the armrest portion and providing a direction movement signal to the auxiliary wheel or the power switching portion,
Wherein the side frame portion is formed in a hollow tube shape to rotate the auxiliary wheel frame, the auxiliary wheel frame has a hinge portion for folding the auxiliary wheel side,
Wherein when the wheelchair is folded, the backrest is folded toward the upper surface side of the saddle, the front moving frame moves to the inside of the guide tube portion to move the footrest portion, and the auxiliary wheel frame is inwardly , And the auxiliary wheel side is folded. The method according to claim 1,
The power-
A lever, a motor, and a rotating roller,
A mounting portion mounted on the side frame portion;
A lever connection portion coupled to a side surface of the mounting portion such that the lever rotates;
A coupling bar coupled at one end to the lever connection portion and coupled to the other end of the rotation roller; And
And a connecting bar moving part coupled between the lever connecting part and the connecting bar to move the connecting bar when the lever is moved. The method according to claim 1,
The footrest
A front moving frame which is detachably attached to the front moving frame,
At least one motor for rotating by a power source of the battery, at least one sensor for sensing a pressure applied to the feet of the occupant and operating the motor. The method according to claim 1,
Wherein the side frame part or the auxiliary wheel frame is coated with an aluminum or aluminum alloy pipe prepreg so as to strengthen the strength and reduce the weight. As a foldable wheelchair,
A saddle supporting the occupant's body;
A backrest hinged to the saddle so as to be folded in the saddle direction;
A side frame portion provided on both sides of the saddle and having a wheel attachment portion;
A main wheel detachably attached to the wheel attachment portion;
A footrest supporting the feet of the passenger and having a battery for supplying electric power and auxiliary wheels installed therein and provided with at least one motor rotated by the power of the battery to provide power to the auxiliary wheels;
A front moving frame formed to move along a guide tube formed on the inner side of the saddle and having a receiving part for receiving and releasing the leg support part at one end;
An armrest mounted on the backrest side; And
And a joystick mounted on the armrest portion to provide a direction movement signal to the footrest portion,
Wherein when the wheelchair is folded, the backrest is folded toward the upper surface side of the saddle, and the front moving frame moves inside the guide tube portion to move the footrest portion.

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