KR20090103357A - Wheelchair for climbing the stairs and the wheels thereof - Google Patents

Abstract

PURPOSE: A wheelchair for climbing the stairs and wheels thereof are provided, which improve moving capacity of the disabled person. CONSTITUTION: A wheelchair for climbing the stairs comprises: a pair of wheel frame boards with the same shape and size; plural wheel frame contact body connected to edges; plural hinge shafts(400) which cross within the wheel in the horizontal direction; a hanging rod which crosses within the wheel in the horizontal direction; a fixation pin which is moved in the wheel opposite direction and can be separated from the fixation pin penetration hole; and plural rotary motion parts(200) which have arcuate surface.

Description

WHEELCHAIR FOR CLIMBING THE STAIRS AND THE WHEELS THEREOF}

The present invention relates to a wheelchair and a wheel of a wheelchair. More particularly, the present invention relates to a wheelchair and a wheel capable of running a stairway configured to be able to move up and down stairs, and to safely transport occupants even on the stairs.

In general, wheelchairs are the only means by which a disabled person who cannot use a leg can move, and is classified into a manual wheelchair where a user directly rotates the wheel by hand and an electric wheelchair that is moved according to the rotation of the wheel according to the driving of the motor.

1 is a perspective view showing a conventional electric wheelchair.

A conventional electric wheelchair 10 is positioned at a certain height from the ground and supported by the frame 12, and includes a wheelchair chair 16 including a backrest provided with a handle 14 and a rear lower portion of the wheelchair chair 16. And a drive member 18 formed of a motor and a drive shaft 18a.

And it is installed to contact the outer surface on both sides of the frame 12 supporting the wheelchair chair 16 and is connected to the drive shaft 18a constituting the drive member 18 to transfer the power transmitted from the drive member 18. The left and right pairs of wheels 20 which are rotated in the front-rear direction and installed on the both sides of the front end of the frame 12 to be in contact with the ground to control the movement direction of the electric wheel chair 10 while being rotated back and forth and left and right according to the user's operation. Steering wheel 22 of the, and the steering wheel 22 is made up of the footrest plate 24 is installed in the front lower portion of the wheelchair chair 16 in the state supported by the frame is installed.

In the conventional electric wheel chair 10 having such a structure, when the motor constituting the driving member 18 is driven, the driving shaft 18a connected to the wheel 20 is rotated so that the front or rear movement of the wheelchair is made, and the electric wheel chair ( 10) The direction of movement of the electric wheelchair 12 is adjusted by adjusting the steering wheel 22 installed on the front side in the left and right directions.

However, in the case of the conventional electric wheelchair made in this way it is possible to move forward or backward on the flat road surface there is no problem in the movement, but because it can not go up and down the stairs or pass through the boundary jaw installed on the sidewalk for wheelchairs There is a problem that the right of movement of the physically handicapped is severely limited because it is impossible to enter a building or subway station without a ramp or a disabled lift.

The present invention has been made to solve the problems of the prior art, the present invention has a wheel made of a special structure can move up and down the stairs, and when walking on a flat rather than a staircase works like a normal wheelchair, The objective is to provide a wheelchair that can move freely without the help of others while maintaining the psychological and physical comfort of the occupant.

Wheelchair wheels capable of running the stairs according to the present invention for achieving the above object is coupled to the center and the center of the wheel connected to the drive shaft for rotating the wheel of the wheelchair constant length from the center to the rim of the wheel It consists of a plurality of stepping parts are formed extending at a predetermined angle to each other relative to the center of the wheel and are formed with a plurality of fixing pin through-holes, and the pair is balanced to face each other at a regular interval to correspond to each other A pair of wheel frames having the same shape and size positioned and an arcuate surface corresponding to a part of the ground plane of the wheels. A plurality of wheelbed ground planes connected to the edges, A plurality of hinge shafts, which are coupled to each of the inner surfaces of the pair of stepping portions whose ends face each other and cross the inside of the wheel in a horizontal direction, and both ends are connected to each of the inner surfaces of the pair of wheel frames, and the wheels in a horizontal direction Hanging rods that traverse the inside, and installed in the wheelchair to be movable in both directions along the longitudinal direction of the wheel shaft and moved in the direction of the wheel penetrates through the fixing pin through hole into the wheel or moved in the opposite direction to the fixed pin A pin that can be separated from the through hole, and a pair of wheel frames facing each other, the outer pin being inserted into the center of the wheel from the ground plane of the wheel and receiving the same external force as the direction of rotation of the wheel about the hinge axis. The fixing pin is hinged by the hinge shaft and the hinge shaft so as to enable rotational movement in the direction. When the external force in the direction toward the center of the wheel is received from the ground plane of the wheel in a state separated from the fixed pin through-hole, it rotates about the hinge axis and flows between the pair of wheel frame plates, and the fixing pin passes through the fixing pin through-hole. In the combined state, even when subjected to an external force in a direction perpendicular to the ground plane of the wheel, the fixed pin does not move, and in this state, a plurality of rotating parts having an arc surface such that a portion of the outer surface corresponds to a part of the ground plane of the wheel; It is wound around the hinge shaft, and one end part is supported by the inner surface of the rotating part and the other end part is supported by the wheel frame ground plane, so that no external force is applied in the direction perpendicular to the ground plane of the wheel. In order to maintain a part of the outer surface of the rotating part corresponding to a part of the ground surface of the wheel It is configured to include a torsion spring.

In addition, it is preferable that a rubber pad is applied to a surface corresponding to the ground plane of each wheel of the wheel body ground plane and the pivot unit.

In addition, it is preferable that a cushioning rubber is padded in a portion of the pivoting portion that comes into contact with the locking rod when caught by the locking rod.

In addition, the number of the stepping portion is four and the wheel frame plate preferably has a pinwheel form.

In addition, the fixing pin is preferably elastically supported by a spring installed along the longitudinal direction of the drive shaft.

In addition, the fixing pin is installed on the fixing pin support, the fixing pin support is coupled to the lever, the middle portion of the lever is hinged to one side of the wheelchair to push or pull the lever in the lateral direction to the fixing pin It is preferable that the fixing pin can be inserted into or removed from the hole.

In addition, the wheelchair capable of running the stairs according to the present invention for achieving the above object is an electric wheelchair equipped with the wheelchair wheels on both sides, the wheelchair wheels are equipped with four front and rear two by four wheel rolling method It is preferable.

In addition, a step detection sensor for detecting the presence of the step is provided on the outer side of the direction of the direction of the wheelchair, and if the step is detected by the step detection sensor in the front within a predetermined distance automatically the fixing pin It is preferable that a fixed pin automatic operation unit is provided so as to be pulled out of the fixing pin through hole and the fixing pin is automatically fitted into the fixing pin through hole if it is not sensed that there is a step within a predetermined distance.

In addition, it is preferable that one side of the chair portion of the wheelchair is provided with a horizontal holding portion for keeping the chair portion horizontal.

In addition, the chair portion of the wheelchair is preferably configured to be rotated in place.

As described above, according to the wheelchair wheel capable of running the stairs according to the present invention, the horizontal wheel is formed so as to easily move the stairs or the jaws, and maintains the level of the chair part on which the occupant rides. The advantage is that you can shake off the anxiety of danger. Therefore, it is possible to go to a place where it is difficult to go to the existing wheelchair or electric wheelchair, thereby improving the mobility of the disabled, thereby expanding the participation of the social activities of the disabled, and the non-disabled activities without the need for many modifications to the existing living environment. It is possible to move freely in the living environment to reduce the cost of retrofit of the infrastructure.

1 is a perspective view showing a general electric wheelchair.

Figure 2a is a side view showing a wheel plate of a wheelchair wheel capable of running stairs according to the present invention.

Figure 2b is a side view showing the rotating part of the wheelchair wheel capable of running according to the present invention.

Figure 2c is a side view showing the fixing pin of the wheelchair wheel capable of running according to the present invention.

Figure 3a and Figure 3b is a side view showing a wheelchair wheel capable of running according to the present invention.

Figure 4 is a front view showing a wheelchair wheel capable of running stairs according to the present invention.

Figure 5a to 5d is a side view showing a state in which the wheelchair can run up the stairs according to the present invention up the stairs.

Figure 6a to 6d is a side view showing a state in which the wheelchair can run down the stairs according to the present invention down the stairs.

※ Explanation of code for main part of drawing

100: cast iron 110: cast iron plate

111: center 112: step

113: fixing pin through hole 200: rotating part

210: buffer rubber 220: hinge shaft through hole

230: locking jaw 300: locking bar

400: hinge axis 500: torsion spring

600: fixed pin 700: fixed pin support

730: spring 800: lever

900: obstacle detection sensor 910: downhill stair sensor

1000: chair portion 1100: horizontal holding portion

1200: drive shaft

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2A, 2B, and 2C are front views illustrating components of a wheelchair wheel according to an exemplary embodiment of the present invention.

Figure 2a shows a wheel frame 100 according to an embodiment of the present invention. The wheel frame 100 is composed of a pair of wheel frame plate 110 and the wheel frame ground plane 120 having the same shape and size.

The pair of wheel plates 110 are parallel to each other by a predetermined distance facing each other in a form corresponding to each other. The wheel frame plate 110 is configured to include a central portion 111 and four stepping portions 112 having a constant width extending from the central portion 111 toward the rim of the wheel in a cross shape. The imaginary extension line extending in the longitudinal direction of the stepping unit 112 along the center of the width of the stepping unit 112 is spaced apart from the center of the wheel by a certain distance, and due to this morphology, the wheel frame 110 is entirely pinwheeled. Has a form.

The central part 111 is a part that is connected to the drive shaft 1200 of the wheelchair, and eight coupling bolts 114 connected to the drive shaft 1200 to enable the coupling with the drive shaft 1200 are separated by a predetermined distance from the center of the wheel. It is combined at regular intervals. In addition, each of the four corners of the central portion 111 is formed with a fixing pin through hole 113.

Hanging rod 300 is a member that both ends are connected to each of the center of the pair of wheel frame plate 110 to cross the inside of the wheel in the horizontal direction, the hinge shaft 400 is a pair of both ends facing each other It is a member that is connected to each of the parts adjacent to the wheel rim of the inner surface of the stepping portion 112 to cross the inside of the wheel in the horizontal direction.

The space between the pair of wheel frame 110 is an empty space without any other than the locking rod 300 and the hinge shaft 400 in the middle. The portion connecting the pair of wheel frames 110 to each other is only the wheel frame ground plane 120, which is a portion corresponding to a part of the grounding surface of the locking rod 300 and the wheel. Wheel frame ground plane 120 is a part connected vertically to the edge of the corner 112 corresponding to the rim of the wheel 112 is provided with all four and forms an arc surface.

The hinge shaft 200 is provided as many as the number of the stepping portion 112 provided in one wheel plate 110, all four are provided in this embodiment.

Figure 2b shows a rotating part 200 according to an embodiment of the present invention.

The pivot 200 is a member rotatably coupled to the hinge shaft 400, and a hinge shaft through hole 220 is formed to allow the hinge shaft 400 to penetrate. The portion of the pivoting portion 200 coupled to the hinge shaft 400 is inserted into the space between the pair of wheel frame plates 110, and the other portions can be inserted into the space between the pair of wheel frame plates 110. The width is shorter than the distance between the pair of wheel plates 110.

The rotating part 200 forms an arced surface so that a part thereof may correspond to a part of the ground plane of the wheel, and a hinge shaft is formed at an inner portion adjacent to one end of the arcing surface of the rotating part 200 of the rotating part 200. Hinge shaft through-hole 220 is formed to be coupled to the 400 and the other end of the circular arc surface of the rotating part is provided with a locking jaw 230 that is a portion to be caught on the inner surface of the wheel frame ground plane 120.

In the surface corresponding to the ground surface of each wheel of the wheel frame ground plane 120 and the rotating unit 200 is a rubber that is added as a tire of the car, the ground plane of the wheel of the present invention is in contact with the stairs It is preferable to use a rubber that is harder to some extent than soft rubber, which has a large friction, since a certain amount of slip should be possible.

In addition, as shown in FIG. 3B of the pivoting part 200, when the pivoting part 200 is caught by the locking bar 300, a buffer rubber 210 is formed on the surface of the portion that directly contacts the locking bar 300. Combined.

Figure 2c shows a fixing pin 600 according to an embodiment of the present invention.

The fixing pin 600 penetrates the fixing pin through hole 113 of the wheel frame plate 110 and is inserted into the wheel so that the inner edge of the rotating part 200 is caught by the fixing pin 600 so that the rotating part 200 is fixed. It is to prevent it from moving.

3A and 3B illustrate a wheel of a wheelchair according to an exemplary embodiment of the present invention, and FIG. 3A illustrates a state in which the wheels are completely circular, and FIG. 3B shows one pivoting part 200 of the wheel folded. It shows the figure that went into the inside.

As shown in FIG. 3A, four pivots 200 are hinged to each of the four hinge shafts 400 to form a circular wheel. Of the four rotating parts 200, the rotating parts 200 positioned diagonally to each other are configured to form symmetrical shapes with respect to the center of the wheel. Coupling relationship between the rotating part 200 and the hinge shaft 400 is the rotational axis around the hinge shaft 400 of the rotating part 200 when the external force is applied to the circular arc surface of the rotating part 200 is the drive shaft of the wheel It should be the same as the direction of rotation of 1200.

A torsion spring 500 is installed at the hinge shaft 400. The coil-shaped portion of the torsion spring 500 is wound around the hinge shaft 400, and both ends of the torsion spring 500 extend long. One of the elongated portions is supported by touching the inner surface of the wheel frame ground plane 120 and the other is supported by touching the inner surface of the circular arc surface of the pivot 200.

In the state in which the fixing pin 600 is inserted into the fixing pin through hole 113, the inner edge portion of the pivot 200 comes into contact with the fixing pin 600 and thus cannot be hinged to enter the inside.

In the state in which the fixing pin 600 is removed from the fixing pin through-hole 113, when the rotating part 200 receives an external force, the hinge pin 400 can be rotated about the axis. As shown in FIG. 3B, the rotating part 200 When a pressing force is applied to one of the outside, the pressed rotating part 200 is hinged inward with the hinge axis 400 as the axis, so that the rotating part 200 is between the pair of wheel frames 100. You enter the space. The maximum range in which the rotating unit 200 can move in the inner direction of the wheel is until the inner edge portion of the rotating unit 200 comes into contact with the locking bar 300 as illustrated in FIG. 3B. In the state in which the rotation part 200 touches the catching rod 300, as shown in FIG. 3B, when the wheel is viewed from the side, a hollow portion having a fan shape having a right angle at the center angle is formed.

4 is a front view of the fixing pin, the fixing pin support, and the lever according to an embodiment of the present invention.

The fixing pin 600 is installed on the fixing pin support part 700 surrounding the wheel driving shaft 1200 inside the wheel. The fixed pin support part 700 is installed to move in the direction of the wheel along the longitudinal direction of the drive shaft 1200 or to move in the opposite direction of the wheel and the fixed pin support part 700 is a cylindrical member 710 surrounding the drive shaft 1200 circumference And a square plate member 720 coupled to an end of a portion close to the wheel of both ends of the cylindrical member 710. Of these, four fixing pins 600 are all coupled to each of four corners of the plate member 720, and each of the fixing pins 600 is carbon-supported to receive the spring force.

Due to this configuration, when the fixing pin support part 700 is moved in close contact with the wheel, the fixing pin 600 is not inserted into the fixing pin through-hole 113 at one time and touches the outer surface of the center of the wheel frame plate 110. The spring 730 is in contact with the fixing pin 600 is contracted and the fixing pin 600 is the spring 730 at the moment that the fixing pin through-hole 113 is able to enter the fixing pin 600 due to the rotation of the wheel. ) Can be automatically inserted into the fixing pin through hole 113 by the pushing force so that the fixing pin 600 is always inserted into the fixing pin through hole 113.

In the cylindrical member 710 of the fixing pin support part 700, the locking groove 711 is enclosed while the cylindrical member 710 is rounded, and the lower end of the lever 800 is divided into two branches and the two branches are divided into levers ( Each of the lower ends of the 800 is inserted into the locking grooves 711 at both sides of the cylindrical member 710. On the other hand, the middle portion of the lever 800 is hinged to the hinge portion 810 of one side of the wheelchair, holding the upper portion of the lever 800 and pulled inward, the lever 800 is hinged by the fixing pin 600 When moved toward the wheel and grasping the upper portion of the lever 800 and pushed outwards, the lever 800 is hinged to move the fixing pin 600 to the opposite side of the wheel. Since the lever 800 is not fixedly coupled to the fixing pin support 700 and is inserted into the locking groove 711 while being separated, the fixing pin support 700 is rotated together when the wheel is rotated, but the lever 800 is the wheel. I do not rotate with the fixing pin support 700. Pushing and pulling the lever 800 is preferably configured to be automatically operated in connection with the obstacle detection sensor 900 of the wheelchair.

5a to 5d and 6a to 6d illustrate a wheelchair equipped with a wheelchair wheel configured as described above.

The wheelchair is a four-wheel drive wheelchair equipped with two front wheels and two rear wheels as an electric wheelchair moving forward or backward by a motor drive. The four wheels are mounted because they are more stable in climbing stairs than two wheels.

Chair portion 1000 of the wheelchair is configured to be rotated 180 °, the horizontal holding portion 1100 for maintaining the horizontal of the chair portion 1000 is provided on one side of the chair portion (1000). When the horizontal maintenance unit 1100 detects the inclination of the road surface by the body of the wheelchair and the chair horizontal sensor, the horizontal motor is operated until the chair horizontal sensor recognizes the horizontal to eliminate the corresponding inclination, thereby reducing the center axis of the horizontal gear. By being rotated as a reference, the center of gravity of the chair unit 1000 and the occupant is spontaneously moved to the opposite side of the upward or downward inclination so as to prevent the fall of the wheelchair. However, the configuration of the horizontal holding unit 1100 as described above is just one example and may be applied to other structures.

FIG. 5A illustrates a wheelchair operating on a flat surface, wherein a gear is operated at a high speed during flat driving, and the horizontal holding unit 1100 adjusts the chair unit 1000 horizontally.

Figure 5b shows the wheelchair just before the stairs ascend, about 50cm before approaching the stairs the obstacle sensor 900 attached to the front of the wheelchair is activated and the gear is switched to low speed. Before about 20cm, the fixing pin 600 of the folding wheel is taken out so that the stairs can be climbed.

FIG. 5C illustrates a wheelchair in which the stairs are being raised and lowered, and the chair unit 1000 is inclined forward and maintained horizontally during the stairs lifting. At this time, the lower end of the stepping portion 112, which is folded into the wheel and extends horizontally forward, reaches the upper surface of the stairs until it reaches the locking rod 300 for each rotating part 200 touching the stairs.

5d illustrates a wheelchair in which the stairs are lifted and completed, and the chair unit 1000 returns to its original position and the fixing pin 600 is fitted to the wheel to change the wheel to the flat mode.

Figure 6a shows the wheelchair before the stairs descending, the chair unit 1000 is rotated 180 ° in place compared to when climbing the stairs, when the downhill staircase sensor attached to the rear of the wheelchair operates the gear is slow Changed to just before the stairs, the fixing pin 600 of the wheel falls out.

6B shows the wheelchair descending the stairs, and the chair part 1000 is horizontal while descending.

Figure 6c shows the wheelchair completed the step of descending, the chair is in the original position and the fixed pin 600 of the wheel is locked to the front wheel and the rear wheel by the fixed pin 600 in sequence, the gear is switched at high speed.

Figure 6d is a flat running wheelchair, the sensor detects whether the stairs or obstacles to drive.

As described above, the present invention has been described only with respect to specific examples, but it will be apparent to those skilled in the art that various changes and modifications can be made within the technical spirit of the present invention based on the above specific examples. And modifications belong to the appended claims.

Claims (11)

A plurality of stepping stones are coupled to the center of the wheel connected to the drive shaft for rotating the wheel of the wheelchair and the center extends a predetermined length from the center in the direction of the rim of the wheel and are arranged at a predetermined angle with respect to the center of the wheel A pair of wheel frames having the same shape and size, including a portion, and having a plurality of fixing pin through-holes formed thereon, the pair being equally positioned to face each other in a form corresponding to each other at regular intervals; A part of an arcuate surface corresponding to a part of a ground plane of the wheel, wherein a plurality of wheel frame ground planes connected to corners which are part of a rim of the wheel of the pair of stepping sides facing each other; A plurality of hinge shafts, each of which is coupled to each inner surface of the pair of stepping portions facing each other and traverses the inside of the wheel in a horizontal direction; A locking rod having both ends connected to each of the inner surfaces of the pair of wheel frames to cross the inside of the wheel in a horizontal direction; It is installed in the wheelchair to be movable in both directions along the longitudinal direction of the wheel shaft, moved in the direction of the wheel penetrates through the fixing pin through hole to be introduced into the wheel or moved in the opposite direction to the wheel can be separated from the fixing pin through hole Fixing pins; The hinge shaft may be rotated in the same direction as the rotational direction of the wheel about the hinge axis when a part is sandwiched between the pair of the wheel frame facing each other and receives an external force in the direction toward the center of the wheel from the ground plane of the wheel When the fixing pin is coupled to the hinge and receives an external force in a direction toward the center of the wheel from the ground plane of the wheel in a state separated from the fixing pin through-holes are rotated about the hinge axis is introduced between the pair of wheel frame plate, In the state that the fixing pin is coupled to the fixing pin through-hole, even if it receives an external force in a direction perpendicular to the ground plane of the wheel, it is not caught by the fixing pin and in this state, a part of the outer surface corresponds to a part of the ground plane of the wheel. A plurality of rotating parts having an arcuate surface; And It is wound around the hinge shaft, and one end part is supported by the inner surface of the rotating part and the other end part is supported by the wheel frame ground plane, so that no external force is applied in the direction perpendicular to the ground plane of the wheel. In the wheelchair wheel capable of running stairs, characterized in that comprising a torsion spring is configured to maintain a portion of the outer surface of the rotating part corresponding to a portion of the ground surface of the wheel. The method of claim 1, The wheel corresponding to the ground plane of each of the wheel frame ground plane and the rotating part of the wheel, characterized in that the rubber padded wheelchair wheel capable of running. The method according to claim 1 or 2, Wheelchair wheels capable of running stairs, characterized in that the cushioning rubber is padded in the portion of the rotating part in contact with the engaging rod when the engaging rod. The method according to claim 1 or 2, The number of the stepping portion is four and the wheel frame is wheelchair wheel capable of running stairs, characterized in that it has a pinwheel shape. The method according to claim 1 or 2, The fixed pin is a wheelchair wheel capable of running stairs, characterized in that the support is shot by a spring installed along the longitudinal direction of the drive shaft. The method according to claim 1 or 2, The fixing pin is installed on the fixing pin support portion, the fixing pin support portion is coupled to the lever, the middle portion of the lever is hinged to one side of the wheelchair to push or pull the lever in the lateral direction to fix the fixing pin Stepped wheelchair wheel, characterized in that configured to be inserted into or removed from the pin through hole. A wheelchair capable of running on stairs, characterized in that the electric wheelchair equipped with either of the wheelchair wheels on both sides. The method of claim 7, wherein The wheelchair wheels are wheelchairs capable of running stairs, characterized in that the four front and rear two by four are equipped with four wheels rolling method. The method according to claim 7 or 8, A step detection sensor is provided on the outer side of the direction of the wheelchair toward the presence of a stair, and when the stair detection sensor detects that the step is within a predetermined distance, the fixing pin is automatically Stair running is characterized in that the fixed pin is provided with an automatic operation unit to be pulled out from the pin through hole and the fixed pin is automatically fitted into the pin through hole if it is detected that there is a step within a certain distance ahead Wheelchair that can run stairs. The method according to claim 7 or 8, One side of the chair portion of the wheelchair is a wheelchair capable of running stairs, characterized in that the horizontal holding portion is provided to keep the chair portion horizontal. The method according to claim 7 or 8, Chair portion of the wheelchair is a wheelchair capable of running, characterized in that the rotation is configured in place.