KR20170064024A

KR20170064024A - Apparatus of holding postural position for wheelchair

Info

Publication number: KR20170064024A
Application number: KR1020150168336A
Authority: KR
Inventors: 오도영; 김근우; 심한수; 김범기
Original assignee: 주식회사이지무브
Priority date: 2015-11-30
Filing date: 2015-11-30
Publication date: 2017-06-09

Abstract

In the present invention, the two support frames for supporting the seat of a wheelchair are configured to be swingable at a staggered position, so that even if the wheelchair tilts according to the road surface condition, the user of the wheelchair can maintain a predetermined posture The present invention has been made in view of the above problems, and it is an object of the present invention to provide a posture maintaining apparatus for a wheelchair which can be used safely without collapsing a wheelchair or collapsing a wheelchair user.
Particularly, in the present invention, since these two support frames are configured to be able to transmit the rotation force of the motor to the gears and to perform the rocking motion, the force and the speed can be manipulated with a simple structure, Another object of the present invention is to provide a posture maintaining device for a wheelchair which can maintain the posture of the user of the wheelchair continuously and stably regardless of the road surface state because the rotational force is transmitted accurately and quickly using the engagement.
In addition, according to the present invention, the support frame supporting the seat on which the wheelchair user sits can be adjusted not only in a horizontal state but also in a user's or a guardian's control through a controller, Still another object of the present invention is to provide a posture maintaining apparatus for a wheelchair that can stably maintain the posture setting according to the road surface state.

Description

[0001] APPARATUS OF HOLDING POSTURAL POSITION FOR WHEELCHAIR [0002]

The present invention relates to a posture maintaining apparatus for a wheelchair, and more particularly, to a support frame for supporting a seat, which is supported by a damper, absorbs shock transmitted through a road surface or the like and can use the wheelchair smoothly and stably. If a situation occurs in which the wheelchair can not be moved due to overturning or tilting, it is notified to the terminal that has been registered in advance, so that the safety of the wheelchair user can be improved.

The wheelchair has been developed and used in various forms according to the degree of disability of the user as a chair, so that a person who is not free of legs or a person with a physical disability can move while sitting. As an example, according to the driving method, a hand wheelchair having a pushing wheel can be used when a hand can be used, and an electric wheelchair can be used when a hand can not be used freely.

On the other hand, a wheelchair generally has no problem in the case of a user who can freely move his / her upper body, but in the case of a user who moves his / her upper body irrespective of the will of the user like a serious obstacle, You need to maintain posture or support your body to keep it from moving. Patent Documents 1 to 4 disclose a technique for maintaining such a posture.

(Patent Document 1) Korean Patent No. 1010010

The chair can always be changed to be in a horizontal position even when traveling along a sloping road with a normal structure that can be supported by a person in a sitting position, so that it can be used for a patient who is suffering from an upper body motion such as a stroke patient or a cerebral palsy patient The object of the present invention is to provide an automatic adjustment device for a parallel seat posture of a wheelchair

(Patent Document 2) Korean Patent Publication No. 10-2013-0057648

The present invention relates to a wheelchair attitude control system in a ramp and a control method therefor, and a wheelchair attitude control system in a ramp that measures the inclination of a wheelchair in a ramp and maintains the level by adjusting the height of the wheelchair according to the measured inclination .

(Patent Document 3) Korean Patent No. 1290837

The present invention relates to a manual or motorized wheelchair, which prevents a conventional wheelchair from being overturned easily due to bad road surface, road environment, or unexpected situation occurring while driving, thereby preventing a safety accident of an occupant in advance due to an unexpected accident, . To this end, a safety wheel frame is provided so that the length in the width direction of the wheelchair body frame can be varied in the left and right sides of the wheelchair body in a standby state. When the vehicle body senses danger or the body posture becomes unbalanced during operation, And the safety wheel frame is quickly opened and driven to prevent the wheelchair from being rolled over.

(Patent Document 4) Korean Patent Publication No. 10-2014-0008072

The present invention relates to a wheelchair having a posture assisting function for allowing a user who does not normally maintain his / her body to maintain his / her proper posture while unintentionally moving away from his / her position to use the wheelchair safely. A seat cushion and a seat bag fixed to a frame having a driving wheel and a secondary wheel, and an upper body belt provided on the seat back so as to be able to keep the upper body of the user in a safe state.

However, the conventional posture maintaining apparatus has the following problems.

(1) There are many structures in which a user who uses a wheelchair is usually restrained and worn so as not to fall out of a wheelchair. This restrains the user from falling in the wheelchair by restricting the user with the wheelchair, but causes other problems.

(2) For example, when a wheelchair is used on a road with uneven terrain or sloping roads, when the user's body is restrained, the center of gravity of the wheelchair tends to shift toward one side, have.

(3) If the wheelchair falls like this, the wheelchair may fail and can not be used immediately. In particular, there is a risk that the user may be injured by being laid or pressed by the wheelchair.

(4) In order to solve such a problem, another patent document discloses a technique in which a wheelchair compensates for a position before and after a wheelchair so that a user always maintains a horizontal state. However, these techniques also cause the following problems.

(5) First, when the wheelchair travels on a sloping road or rough road in the left-right direction instead of the vertical direction, that is, when the wheelchair is moved leftward or rightward on the inclined road, the above-described problem may always occur.

(6) Also, in the case of running on a vertically inclined road by a wheelchair, the wheelchair does not necessarily travel in the vertical direction at all times. Therefore, And the like.

(7) Since shocks and vibrations are transmitted directly to the left and right sides of the frame through wheels or casters, shocks and vibrations are transmitted to wheelchair users when traveling on rough roads or unpaved roads.

(8) Furthermore, such shocks or vibrations may cause the wheelchair to tilt or fall over when it moves, and there is no safeguard to notify such a situation, especially when a rollover accident or a wheelchair can not move There is a risk of putting wheelchair users in dangerous situations.

Korean Registered Patent No. 1010010 (Registered on January 14, 2011) Korean Patent Laid-Open No. 10-2013-0057648 (Publication date: 2013.06.03) Korean Registered Patent No. 1290837 (Registered on July 23, 2013) Korean Patent Laid-Open No. 10-2014-0008072 (Published on 2014.01.21)

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and it is an object of the present invention to provide a seat for a wheelchair which is structured such that two support frames supporting a seat of a wheelchair can swing at a staggered position, So that the wheelchair user can maintain a predetermined posture regardless of whether the wheelchair is inclined according to the road surface condition of the road so that the wheelchair can be used safely without collapsing or collapsing the wheelchair user, And an object of the present invention is to provide a posture maintaining apparatus for a wheelchair which absorbs vibration and can be used safely and conveniently.

Particularly, the present invention is configured such that a support frame supporting a seat for a wheelchair user is configured not only in a horizontal state but also in a user's or guardian's controllable angle through a controller, It is possible to stably maintain the posture setting according to the road surface state and also to allow communication with the communication means (module) so as to notify the fact that the wheelchair has been tilted so that the wheelchair can not be overturned or moved, The present invention also provides a posture maintaining apparatus for a wheelchair which enables a user of a wheelchair to cope with an urgent situation so that safety can be improved.

In order to achieve the above object, a posture maintaining apparatus for a wheelchair according to the present invention is provided with a base frame 100 mounted on the wheelchair W, the posture maintaining apparatus being mounted on an electric or manual wheelchair W; A first driving means 200 including a motor 210 rotating in a forward and reverse direction and mounted on the base frame 100 and a first gear train 220 transmitting rotational force of the motor 210; (1) having a first gear bracket (310) for engaging with the first gear train (220) is provided on one side of the first driving means (200) 1 support frame 300; The first support frame 300 is mounted on the middle portion of the first support frame 300 to support the seat of the wheelchair so that the first support frame 300 can be rotated with the first support frame 300. A second gear bracket 410 A second support frame 400 having a first support frame 400; A motor 510 mounted on the first supporting frame 300 and a second gear train 520 engaged with the second gear bracket 410 to transmit the rotational force of the motor 210 Second driving means (500); A horizontal sensing sensor 600 mounted on the second support frame 400 to sense a horizontal state; And a controller 700 for operating the motors 210 and 510 based on the detection signals of the horizontal sensing sensor 600 to control the second support frame 400 to maintain a predetermined posture, The second support frame 400 is supported by at least three dampers 420 between the base frame 100 and the first driving means 200 and the controller 700 is connected to the horizontal sensing sensor 600 to determine whether the wheelchair has been rolled over or not, and if it is judged that the wheelchair has been rolled over, the communication module 710 can notify the terminal that has been registered beforehand of the rollover.

Particularly, the base frame 100 is mounted on one side of the wheelchair W so as to be rotatable up and down with respect to the wheelchair W, and a buffer spring 111 is mounted between the wheelchair W and the base frame 100 So as to cause a buffering action to be made up and down.

The first gear train 220 includes a first gear 221 connected to the shaft of the motor 210 and integrally rotated therewith. A second gear 222 that rotates in direct engagement with the first gear 221; And a third gear (223) that rotates on the same rotational axis at a predetermined distance from the second gear (222) and engages with the first gear bracket (310).

The second gear train 520 includes a fourth gear 521 connected to the shaft of the motor 510 to rotate integrally therewith and a fourth gear 521 integrally rotated with the fourth gear 521, A gear 522; And a sixth gear 523 engaged with the fifth gear 522 and the second gear bracket 410.

Lastly, the controller 700 inputs the position of the second support frame 400 in a horizontal state or a horizontal state at an angle of a predetermined angle in advance based on the horizontal state according to the degree of obstacle of the wheelchair user, And controls to maintain the inputted state.

The posture maintaining apparatus for a wheelchair according to the present invention has the following effects.

(1) Since the two support frames supporting the seat on which the wheelchair user sits by using the motor and the gear are staggered from each other, the wheelchair users can maintain the posture by making the up and down and the left and right swings respectively. You can also use the wheelchair safely and conveniently when you are driving, hiking, or on slopes.

(2) Since the power required to maintain the attitude is transmitted through the gear engagement, accurate power transmission is achieved, so that the attitude to be maintained can be quickly and firmly maintained.

(3) The fixing frame for supporting the posture maintaining device according to the present invention can be pivoted up and down on the wheelchair, and in particular, a buffer spring is further provided between the wheelchair and the fixed frame, So that the wheelchair user can more comfortably use the wheelchair.

(4) By configuring the attitude angle of the supporting frame that supports the seat to be used by the wheelchair user to be controlled by the user or guardian of the wheelchair through the controller, the wheelchair can be used in the most comfortable posture according to the degree of obstacle of the wheelchair user It is convenient to adjust the angle of the frame.

(5) The posture maintaining device according to the present invention can be applied not only to a manually used wheelchair but also to an electric wheelchair driven by a battery or the like.

(6) As described above, the present invention uses a gear and a motor to pivot the support frame, so that the structure is simple and easy to manufacture.

(7) Since the support frame for supporting the seat is configured to be supported by the damper, vibration or shock transmitted from the road surface can be absorbed by the damper, so that the wheelchair user can conveniently and safely use the wheelchair.

(8) When a communication module is configured and a situation occurs in which the wheelchair can not be rolled over or moved, it is configured to be notified of a rollover to a terminal registered in advance, such as a rescue center or a guardian.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view showing an entire configuration of an orientation maintaining apparatus according to the present invention. FIG.
FIG. 2 is an exploded perspective view showing the entire shape of the posture maintaining apparatus according to the present invention. FIG.
FIG. 3 is a perspective view showing the overall shape of the posture maintaining apparatus according to the present invention. FIG.
FIG. 4 is a side view showing the overall shape of the posture maintaining apparatus according to the present invention. FIG.
5 is a rear view for showing the overall shape of the posture maintaining apparatus according to the present invention.
FIG. 6 is a plan view showing the overall shape of the posture maintaining device according to the present invention. FIG.
7 is a block diagram for controlling a motor for operating the posture maintaining apparatus according to the present invention.
8] to [Fig. 11] are diagrams showing a posture maintaining state of the posture maintaining device according to the present invention. [Fig.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should properly define the concept of the term to describe its invention in the best possible way The present invention should be construed in accordance with the spirit and scope of the present invention.

Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Thus, various equivalents And variations may be present.

(Configuration)

The posture maintaining apparatus for a wheelchair according to the present invention is characterized in that the base frame 100 mounted on the wheelchair W as shown in Fig. 1 to Fig. 11 can be moved up and down in a state of being staggered A first driving unit 200 and a second driving unit 500 for operating the first supporting frame 300 and the second supporting frame 400 mounted on the first and second supporting frames 300 and 400 and the driving units 200 and 500, And a controller 700. The horizontal sensing sensor 600 and the controller 700 are the same as those shown in FIG.

Particularly, according to the present invention, each of the driving means (200, 500) for pivotally moving the support frames (300, 400) is constructed in a gear system so that the structure is simple, have.

In addition, according to the present invention, the holding posture can be adjusted through the controller 700, so that the posture position can be adjusted so that the wheelchair user can maintain the most comfortable posture even if the seat of the wheelchair is not in a horizontal state, So that the wheelchair W can be conveniently used.

Hereinafter, this configuration will be described in more detail as follows. Here, the wheelchair W means a wheelchair made of an ordinary technique manufactured by an electric type or a manual type, and the present invention shows an example in which the posture maintaining device according to the present invention is mounted on an electric wheelchair.

The base frame 100 is attached to the wheelchair W and supports other components as shown in [Figure 1] to [Figure 6]. This base frame 100 is shown mounted on a connecting bar B connecting driving means on both sides of the wheel chair W of the electric type in the figure.

In a preferred embodiment of the present invention, the base frame 100 can be manufactured in any form as long as it can support the first driving means 200 to be described later. 1 and 2 show an example in which a pair of horizontal bars 110 are formed in parallel with the both side driving means of the wheelchair W and a wall 120 connecting them between the horizontal bars 110 Lt; / RTI >

Also, in a preferred embodiment of the present invention, the base frame 100 is configured to be able to perform a buffering action as the wheelchair W is driven, so that a user of the wheelchair can sit comfortably while driving. To this end, the base frame 100 is mounted on the wheel chair W so as to be pivotable up and down using a connecting bar B as shown in FIGS. 1 and 2, And is mounted so as to obtain a buffering effect while moving up and down. At this time, the buffer springs 111 can be mounted anywhere between the base frame 100 and the wheelchair W so that the base frame can be vertically cushioned. In the figure, the horizontal bar 110 It shows an example of bending over a wheelchair and mounting it in between.

The first driving means 200 is mounted on the base frame 100 to rock the first support frame 300 to be described later, as shown in Figs. 1 to 5. The first driving means 200 includes a motor 210 for generating an actual driving force and a first gear train 220 for swinging the first supporting frame 300 by the rotational force of the motor 210 .

Generally, the motor 210 is used, but it is preferable to configure the motor 210 so that the rotation direction and the speed can be easily controlled by using a motor that can rotate in the forward and reverse directions. This motor 210 is mounted on the above-described base frame 100. In this case, the motor 210 is mounted in a block made in a box shape.

The first gear train 220 is attached to the first driving means 200 to transmit the rotational force of the motor 210 as shown in FIGS. 1 and 2 and 4. To this end, a first gear 221 mounted on the shaft of the motor 210, a second gear 222 rotated in engagement with the first gear 221, and a first support frame 300 And a third gear 223.

In the preferred embodiment of the present invention, the first gear train 220 is configured to transmit the rotational force of the motor 210 directly to the first support frame 300 using one gear, In the present invention, since the gears are arranged in a limited space, the gears do not interfere with each other due to interference or misalignment. Of course, it is more preferable to use the direct connection as long as such position adjustment is possible.

The first support frame 300 is configured to support a second support frame 400 to be described later and swing up and down as shown in Figs. 1 to 6. To this end, the first support frame 300 is preferably formed in a shape similar to that of the seat, that is, a square shape. In the drawing, an example is shown in which a grid made of beam-shaped bars is used. However, it may be manufactured in the form of a plate.

The first supporting frame 300 is mounted on the first driving means 200 so as to be swingable as shown in Figs. 1 and 2 and 4. To this end, the first support frame 300 is rotatably mounted on the first drive means 200 at an intermediate portion thereof, and in particular, the first gear bracket 310 is mounted on either side of the rotation center .

Here, the first gear bracket 310 is configured to support the rotation of the first support frame 300, as shown in FIGS. 1 and 2, and has a gear formed on one side will be. At this time, the gear formed on the first gear bracket 310 is engaged with the above-described third gear 223 as shown in Fig.

The first support frame 300 constructed as described above is configured to receive the driving force of the first driving means 200 when the wheelchair W ascends or descends the ramp as an example, as shown in FIGS. 8 and 9, It is possible to maintain a horizontal state.

The second support frame 400 is formed in the same shape as the first support frame 300 described above with reference to FIG. 1 and FIG. 2. That is, the second support frame 400 supports the seat on which the wheelchair user sits, as shown in Figs. 8 to 11.

The second support frame 400 is formed in the same shape as the first support frame 300, that is, in the shape of a square, and rotatably supports the intermediate portion of the length so as to enable the swing rotation, Thereby forming the second gear bracket 410.

However, the second support frame 400 differs from the first support frame 300 in the following points.

First, the second support frame 400 is mounted so that it can swing at a position staggered with the first support frame 300. This is because if the first support frame 300 is for positioning the posture on an inclined road as shown in Fig. 8 and Fig. 9, The posture can be maintained at the left and right sides in the traveling direction of the road as an example. It is preferable to control the posture so as to cooperate with each other in accordance with the road surface state through the interaction of the two support frames 300 and 400.

Second, the second support frame 400 has a larger size as compared to the first support frame 300, as shown in FIGS. 1 and 2. This is to allow the second support frame 400 to have a sufficient size to support the seat of the wheelchair.

Third, the second support frame 400 is installed to receive the support of the damper 420 as shown in [Figure 1], [Figure 2], [Figure 4] and [Figure 5] The illustration of the damper 420 is omitted). At this time, the damper 420 is rotatably mounted on the second support frame 400, and the other is mounted on the base frame 100 or the first drive unit 200 so as to rotate. In the drawing, an example of mounting to the base frame 100 is shown. In particular, at least three dampers 420 may be mounted, preferably four at each of the corners of the second support frame 400. The damper 420 prevents the second support frame 400 from moving suddenly, thereby enabling the user to move safely and smoothly, thereby performing a damping operation so that the user of the wheelchair can absorb the shock transmitted through the ground or the like and use comfortably . In addition, the damper 420 acts to absorb shocks such as crawling that may occur when the motors 210 and 510 start or stop operating.

The second driving means 500 includes a motor 510 for generating a rotational force and a second gear train for transmitting rotational force through the second gear bracket 410, as shown in Figs. 1 to 5 (520) and is the same as the first driving means (200). Therefore, the detailed configuration will be omitted and the difference will be mainly described.

That is, the motor 510 is rotatable in the forward and reverse directions, and is mounted on the first support frame 300 described above. The second gear train 520 has three fourth to sixth gears 521 to 523 meshed with each other so that the first gear 521 is connected to the shaft of the motor 510 and the sixth gear 523 engage with the second gear bracket 410.

The second driving means 500 constructed as described above is constituted by a second supporting frame 400 (see FIG. 10) and a second supporting frame 400 And the second support frame 400 maintains the posture such that the second support frame 400 is in a horizontal state when the wheelchair is tilted to the left and right in the traveling direction of the wheelchair W. [

The horizontal detection sensor 600 can be installed wherever the horizontal state of the second support frame 400 can be detected. 7, the horizontal sensing sensor 600 senses the horizontal state of the second support frame 400 and outputs a sensing signal to the controller 700 to utilize the sensed signal as data necessary for maintaining the posture.

The horizontal sensing sensor 600 may be any sensor capable of detecting a certain degree of tilt in a horizontal direction and a horizontal direction. For example, a gyro sensor may be used as the horizontal sensing sensor 600, and a gyro sensor may be used that is manufactured by a conventional technique for detecting the current direction, angle, and motion.

The controller 700 controls the motors 210 and 510 based on the detection signals of the horizontal sensing sensor 600 as shown in FIG. At this time, the controller 700 basically controls the motors 210 and 510 so that the second support frame 400 can maintain the horizontal state, so that the wheelchair mounted with the posture maintaining device according to the present invention can be easily rotated, Even when driving on the road, the wheelchair user can always maintain his / her first posture.

In the preferred embodiment of the present invention, the controller 700 controls the second support frame 400 to maintain a horizontal state, but may be configured to be set in advance so as to maintain a predetermined angle, . This is because, in the case of a wheelchair user, the posture of the wheelchair user changes according to the degree of injury, and the second support frame 400 may not be horizontal in order to sit comfortably. Thus, by arbitrarily adjusting the setting angle of the second support frame 400 according to the degree of obstacle of the user, the user of the wheelchair can set the posture suitable for him / herself, so that the wheelchair can be used more comfortably.

In addition, although the position of the second support frame 400 is described by way of example, the position of the first support frame 300 can be adjusted together with the second support frame 400, It is desirable to be able to set the most comfortable posture in a sitting position.

In a preferred embodiment of the present invention, the controller 700 preferably further comprises a communication module 710 so as to be able to notify when the wheelchair is overturned, as in Fig. At this time, the communication module 710 may adopt any one of a software format through a program and a hardware format such as a device, and is configured to be able to communicate with the outside based on the output signal of the horizontal sensing sensor 600 . That is, the controller 700 always receives the output signal detected by the horizontal sensing sensor 600, and when the wheelchair is completely or partially tilted and unable to move through the input value (for example, The wheelchair is in the rollover state), the control unit 710 causes the terminal registered in advance to notify the fact of rollover. Here, the terminal may be exemplified by a wired telephone, a wireless telephone, and a walkie-talkie such as a protector or a hospital of a wheelchair user and an emergency center registered in advance.

FIGS. 8 to 11 show that the second support frame is in a horizontal state when the wheelchair is tilted in the forward and backward directions and in the leftward and rightward directions with respect to the advancing direction of the wheelchair using the posture maintaining apparatus according to the present invention Giving. However, it will be appreciated by those skilled in the art that the posture maintaining apparatus according to the present invention may be installed in a staggered arrangement so that the horizontal state can be maintained at any angle through the support frame for swinging motion, You will know.

As described above, according to the present invention, the two support frames staggered from each other can be pivotally moved to maintain a predetermined posture of the seat of the wheelchair, so that the user can comfortably use the wheelchair safely while the structure is simple. .

In addition, since the support frame supporting the seat plate is configured to receive the damper support, it can absorb vibration and shock transmitted from the ground, and can be safely and conveniently used. In addition, since the present invention has a communication means (module) that can notify the protector or the emergency center when the wheelchair is tilted and can not move normally, such as an overturning accident, it is possible to immediately cope with rollover accidents, .

100: base frame 110: horizontal bar
111: buffer spring 120:
200: first driving means 210, 510: motor
220: first gear train 221: first gear
222: second gear 223: third gear
300: first support frame 310: first gear bracket
400: second support frame 410: second gear bracket
500: second driving means 520: second gear train
521: fourth gear 522: fifth gear
523: sixth gear 600: horizontal sensing sensor
700: Controller W: Wheelchair

Claims

A posture maintaining device for mounting on an electric or manual wheelchair (W)
A base frame 100 mounted on the wheelchair W; A first driving means 200 including a motor 210 rotating in a forward and reverse direction and mounted on the base frame 100 and a first gear train 220 transmitting rotational force of the motor 210; (1) having a first gear bracket (310) for engaging with the first gear train (220) is provided on one side of the first driving means (200) 1 support frame 300; The first support frame 300 is mounted on the middle portion of the first support frame 300 to support the seat of the wheelchair so that the first support frame 300 can be rotated with the first support frame 300. A second gear bracket 410 A second support frame 400 having a first support frame 400; A motor 510 mounted on the first supporting frame 300 and a second gear train 520 engaged with the second gear bracket 410 to transmit the rotational force of the motor 210 Second driving means (500); A horizontal sensing sensor 600 mounted on the second support frame 400 to sense a horizontal state; And a controller 700 for operating the motors 210 and 510 based on the detection signals of the horizontal sensing sensor 600 to control the second support frame 400 to maintain a predetermined posture,
The second support frame 400 is supported by at least three dampers 420 between the base frame 100 and the first driving means 200,
The controller 700 determines whether the wheelchair has been rolled over based on the output signal of the horizontal sensor 600. If the controller 700 determines that the wheelchair has been rolled over, And a control unit for controlling the posture of the wheelchair.

The method according to claim 1,
The base frame (100)
One of which is rotatably mounted on the wheelchair (W)
And a cushion spring (111) is mounted between the wheel chair (W) and the base frame (100) so that the cushion spring is vertically moved.

The method according to claim 1,
The first gear train (220)
A first gear 221 connected to the shaft of the motor 210 and integrally rotated therewith; A second gear 222 that rotates in direct engagement with the first gear 221; And a third gear (223) that rotates on the same rotational axis at a predetermined distance from the second gear (222) and engages with the first gear bracket (310).

The method according to claim 1,
The second gear train (520)
A fourth gear 521 connected to the shaft of the motor 510 to rotate integrally; a fifth gear 522 mounted to be rotatable in direct engagement with the fourth gear 521; And a sixth gear (523) engaged with the fifth gear (522) and the second gear bracket (410).

5. The method according to any one of claims 1 to 4,
The controller (700)
The position of the second support frame 400 may be inputted in advance in a horizontal state or a horizontal state at an angle of a predetermined angle based on the horizontal state according to the degree of obstacle of the wheelchair user, Wherein the posture maintaining device for a wheelchair is characterized in that: