KR101386915B1 - Manual wheelchair with auto braking device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a passive wheelchair, and more particularly, to a passive wheelchair equipped with an automatic brake device for automatically descending safely by braking the manual wheelchair on a downhill road.
Manual wheelchair equipped with an automatic brake device of the present invention, the main body; Main wheels mounted on both sides of the main body; A brake part mounted on the main body to reduce a rotation speed of the main wheel, wherein the brake part comprises: a tilt sensor for measuring a tilt of the main body; A reduction unit for reducing the rotation speed of the main wheel; A control unit which reduces the rotational speed of the main wheel by operating the deceleration unit according to the measured value of the inclination sensor; Characterized in that it comprises a battery for supplying power to the tilt sensor, the reduction unit and the control unit.

Description

Manual Wheelchair with Automatic Brake System {MANUAL WHEELCHAIR WITH AUTO BRAKING DEVICE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a passive wheelchair, and more particularly, to a passive wheelchair equipped with an automatic brake device for automatically descending safely by braking the manual wheelchair on a downhill road.

Wheelchairs are a single-person vehicle, and the field of injection is a medical aid that helps the disabled, the patient, and the elderly who are inconvenient to move easily.

Such a wheelchair is divided into a manual wheelchair that drives the wheel by manpower and an electric wheelchair that drives the wheel by using a transmission.

In such a wheelchair, driving wheels are provided on both sides of a frame constituting a wheelchair, and a front wheel is provided on both sides of the front end of the frame, or a rear wheel is provided on both sides of the rear wheel to facilitate movement.

Such a wheelchair is provided with a brake for stopping the wheelchair being moved.

In the case of a manual wheelchair, a hand wheel on a wheel is rotated to move forward or backward. Conventionally, a brake is installed on both sides of a main frame on which a rear wheel is mounted so that a user can directly operate the wheelchair. The rear wheel is prevented from flowing while the brake is being operated or released by moving in the backward direction. The brake does not mean braking but prevents the wheelchair from moving while the wheelchair is stopped. In this way, sudden braking is unstable and gives the wheel an unreasonable force.

In addition, when the occupant tries to hold the hand rim by hand while driving, the hand becomes hot due to friction, and the braking cannot be continued continuously or the hand of the occupant is hurt.

In addition, since the conventional brake is designed to brake the wheelchair of the occupant directly, it is difficult to brake the wheelchair in the case of an uncomfortable arm of the occupant when only the occupant moves in the wheelchair without a guardian.

In particular, when the occupant travels in a wheelchair without a guardian on a downhill road, the wheelchair is accelerated when the passenger cannot brake directly, which is very dangerous.

On the other hand, the electric wheelchair is shown in the Patent Publication No. 10-2011-0035779, Patent Publication No. 10-2002-0063053, etc., in the case of the electric wheelchair generally uses a DC motor or a brushless DC motor to obtain a driving force (BLDC) was used.

This DC motor drive device has a large volume, which causes a lot of inconvenience in loading and unloading the vehicle because the wheelchair is not folded smoothly and is heavy. Should be used.

On the other hand, a drive device having a brushless DC motor (BLDC) can solve most of the above problems, but an expensive motor should be used.

In addition, it is impossible to switch from the electric wheel chair to the manual wheel chair. If a motor or control system breaks down or the battery is consumed, no activity is possible and the wheelchair is not easy to move with the help of a guardian.

The present invention is to solve the above-mentioned problems, the manual type wheelchair equipped with a relatively inexpensive brake device to reduce the movement speed of the wheelchair on the downhill road without a protector, the user is provided with an automatic brake device that can safely descend downhill alone The purpose is to provide a wheelchair.

Manual wheelchair equipped with an automatic brake device of the present invention to achieve the above object, the body; Main wheels mounted on both sides of the main body; A brake part mounted on the main body to reduce a rotation speed of the main wheel, wherein the brake part comprises: a tilt sensor for measuring a tilt of the main body; A reduction unit for reducing the rotation speed of the main wheel; A control unit which reduces the rotational speed of the main wheel by operating the deceleration unit according to the measured value of the inclination sensor; Characterized in that it comprises a battery for supplying power to the tilt sensor, the reduction unit and the control unit.

The brake unit further comprises a speed sensor for measuring the moving speed of the main body, the control unit, the value measured by the speed sensor even though the value measured by the inclination sensor is an inclination value that does not operate the deceleration unit When the speed is equal to or greater than the preset speed value, the speed reduction unit is operated to reduce the rotation speed of the main wheel.

The deceleration unit may be periodically contacted with the main wheel by the control unit to reduce the rotation speed of the main wheel.

The deceleration unit includes a motor; An eccentric member having one end coupled to a rotation shaft of the motor and the other end eccentric with the rotation shaft of the motor; A connecting member having one end connected to the other end of the eccentric member; And a friction part connected to the other end of the connection member and selectively contacting the main wheel, wherein the connection member is moved by the rotation of the eccentric member by the motor, and the friction part periodically moves the main wheel. Ensure repeated contact.

The brake unit may further include a shelf on which the deceleration unit or the battery is mounted, and the main body is provided with guide rails on both sides of the central part folded in the left and right directions, and the shelf is provided along the guide rail. Removably mounted on.

In addition, in order to achieve the above object, the control method of a manual wheelchair equipped with an automatic brake device of the present invention, if the measured value of the measured inclination of the wheelchair body is more than a predetermined inclination value, by using the deceleration unit on both sides of the main body It is characterized by reducing the rotational speed of the mounted main wheel.

A tilt measuring step of measuring a tilt of the main body; A first judging step of determining whether the inclination measurement value of the main body is greater than or equal to a preset inclination value; And a braking step of decelerating the rotational speed of the main wheel by operating the deceleration unit. In the first determination step, if the inclination measurement value of the main body is equal to or greater than a predetermined inclination value, the braking step moves to the braking step. In the step, the reduction unit periodically contacts the main wheel repeatedly to reduce the rotation speed of the main wheel.

A speed measuring step of measuring a moving speed of the main body; And a second judging step of determining whether the measured moving speed of the main body is greater than or equal to a preset speed value. If the moving speed measured value is equal to or greater than the preset speed value, the controller moves to the braking step.

According to the passive wheelchair equipped with the automatic brake device of the present invention as described above has the following effects.

By installing a relatively inexpensive brake unit on the passive wheelchair, the speed of the wheelchair can be automatically reduced on the downhill without a guardian, so that the user can safely descend down the road alone.

In addition, by determining the downhill road by using the inclination sensor, the deceleration unit can automatically reduce the speed of the wheelchair on the downhill road, and the friction part can increase the braking performance like ABS for automobiles by repeatedly contacting the main wheel.

In addition, by attaching the shelf to the main body so that the shelf can be detached from the main body, the manual wheelchair main body can be folded and stored and moved.

1 is a perspective view of a passive wheelchair according to an embodiment of the present invention,
2 is a configuration diagram of a brake unit according to an embodiment of the present invention;
3 is a configuration diagram of a reduction unit according to an embodiment of the present invention;
Figure 4 is a mounting structure of the shelf of the passive wheelchair according to an embodiment of the present invention,
5 is a flow chart of a manual wheelchair control method according to an embodiment of the present invention,

1 is a block diagram of a passive wheelchair according to an embodiment of the present invention, Figure 2 is a block diagram of a brake unit according to an embodiment of the present invention, Figure 3 is a mounting structure of the shelf of a manual wheelchair according to an embodiment of the present invention to be.

As shown in Figures 1 to 3, the passive wheelchair equipped with the automatic brake device of the present invention comprises a main body 10, the main wheel 20, and the brake unit 30.

The main body 10 refers to the overall frame of the wheelchair, and the main body 10 includes a handle, a seat, a front wheel, and the like.

The main body 10 is preferably to be folded in the left and right directions, such as a one-way passive wheelchair.

The main wheel 20 is mounted on both sides of the main body 10, and is rotatably mounted to the main body 10.

The brake unit 30 is mounted on the main body 10 to reduce the rotation speed of the main wheel 20.

As shown in FIGS. 2 and 3, the brake unit 30 includes an inclination sensor 31, a reduction unit 32, a control unit 33, a speed sensor 34, a battery 35, a shelf 36. ) And the like.

The inclination sensor 31 is a sensor for measuring an angle in an inclined direction with respect to the center of gravity of the earth, and it is sufficient to use a known one, and detailed structure description thereof will be omitted.

The reduction unit 32 serves to reduce the rotational speed of the main wheel 20.

The deceleration part 32 may be formed in various configurations and structures, but in this embodiment, the deceleration part 32 includes a motor 32a, an eccentric member 32b, a connection member 32c, and a friction part 32d.

The motor 32a is mounted to the shelf 36.

'형상으로 이루어져, 일단이 상기 모터(32a)의 회전축에 결합되고, 타단이 상기 모터(32a)의 회전축과 편심되어 상기 연결부재(32c)에 연결된다.The eccentric member 32b is approximately '

'Consists of a shape, one end is coupled to the rotating shaft of the motor 32a, the other end is eccentric with the rotating shaft of the motor 32a and is connected to the connecting member 32c.

The connecting member 32c is made of a wire or the like, one end of which is connected to the other end of the eccentric member 32b, and the other end of which is connected to the friction portion 32d.

The friction part 32d is attached to the main body 10 and is connected to the other end of the connecting member 32c.

The friction part 32d selectively reduces the rotational speed of the main wheel 20 by selectively contacting the main wheel 20 by the movement of the connecting member 32c.

It is sufficient for the friction portion 32d to use a conventionally known rim brake, disc brake, band brake, or the like.

As shown in FIG. 3, the deceleration part 32 having the above configuration has the connecting member 32c reciprocating by the rotation of the eccentric member 32b by the motor 32a. The friction part 32d periodically contacts the main wheel 20 repeatedly to slow down the rotation speed of the main wheel 20.

In more detail, when the motor 32a rotates, the other end of the eccentric member 32b rotates in a circle.

At this time, the connecting member 32c connected to the other end of the eccentric member 32b is reciprocated in the direction in which the motor 32a is disposed as the eccentric member 32b rotates.

To this end, one end of the connecting member 32c should be rotatably coupled to the other end of the eccentric member 32b.

And, as the connecting member 32c reciprocates by the rotation of the eccentric member 32b, the friction part 32d repeatedly makes contact and non-contact with the main wheel 20, whereby the main wheel The rotation speed of 20 is decelerated.

In this case, the friction part 32d periodically contacts the main wheel 20 repeatedly, such that the main wheel 20 may be braked without slip, such as ABS of a vehicle.

The control unit 33 serves to reduce the rotational speed of the main wheel 20 by operating the deceleration unit 32 according to the measured value of the inclination sensor 31.

That is, the controller 33 prevents the motor 32a from being driven when the measured value of the inclination sensor 31 is less than a preset inclination value, and the measured value of the inclination sensor 31 is greater than or equal to a preset inclination value. On the rear side, the motor 32a is driven to operate the deceleration part 32.

The speed sensor 34 measures the moving speed of the main body 10. In this embodiment, the moving speed of the main body 10 is measured by measuring the rotational speed of the main wheel 20 using a hall sensor. Was measured.

As a method of measuring the rotational speed of the main wheel 20, as shown in FIG. 3, the permanent magnet 37 is mounted on the main wheel 20, and the permanent magnet 37 on the main body 10. Equipped with a Hall sensor for detecting, the Hall sensor, that is, the speed sensor 34 detects the permanent magnet 37 that rotates together with the rotation of the main wheel 20, the rotational speed of the main wheel 20 Can be measured.

The speed sensor 34 may measure the moving speed of the main body 10 in various ways without measuring the rotational speed of the main wheel 20.

At this time, the control unit 33, although the value measured by the inclination sensor 31 is an inclination value that does not operate the deceleration unit 32, the value measured by the speed sensor 34 is a preset speed value If abnormal, the deceleration unit 32 is operated to reduce the rotation speed of the main wheel 20.

That is, even if the wheelchair has descended on the inclined surface, when the movement speed of the wheelchair detected by the speed sensor 34 becomes large, the controller 33 operates the deceleration part 32 to rotate the main wheel 20. Slow down the speed.

The brake unit 30 of the present invention may be operated only by the input of the inclination sensor 31 without the speed sensor 34.

The battery 35 is mounted on the shelf 36 to supply power to the tilt sensor 31, the speed sensor 34, the motor 32a, and the controller 33.

As shown in FIG. 4, the shelf 36 is detachably mounted to the main body 10, and the motor 32a, the battery 35, and the like are mounted thereon.

The shelf 36 is detachably mounted to the front of the main body 10 as shown in FIG. 4 (a) or detachably mounted to the rear of the main body 10 as shown in FIG. 4 (b). To this end, the guide rail 15 is mounted on both sides of the central portion to be folded in the left and right directions in the front and rear directions, and the shelf 36 is slid along the guide rail 15. The main body 10 is detachably mounted.

As described above, the shelf 36 slides in the front-rear direction to be separated from the main body 10, so that the user separates the motor 32a, the battery 35, etc. from the main body 10, and then the main body 10. By folding only), it can be carried in a small volume as in the prior art.

In the passive wheelchair equipped with the automatic brake device of the present invention having the above configuration, when the measured value of measuring the inclination of the main body 10 is equal to or greater than a predetermined inclination value, the main body (using the deceleration unit 32) is used. 10) to reduce the rotational speed of the main wheel 20 mounted on both sides.

More specifically, the manual wheelchair control method of the present invention, as shown in Figure 5, the tilt measurement step (S1), the first determination step (S2), the speed measurement step (S3), and the second determination step ( S4) and the braking step S5.

The inclination measurement step S1 is a step of measuring the inclination of the main body 10 using the inclination sensor 31.

The first determination step (S2) is a step of determining whether the inclination measurement value of the main body 10 measured by the inclination sensor 31 is greater than or equal to a preset inclination value, and measuring the inclination of the main body 10. If the value is equal to or greater than the preset slope value, the controller moves to the braking step S5.

The speed measuring step S3 is a step of measuring the moving speed of the main body 10 by using the speed sensor 34.

The second determination step (S4) is a step of determining whether the moving speed measurement value of the main body 10 measured by the speed sensor 34 is greater than or equal to a preset speed value, and the inclination of the main body 10. Even if the measured value is less than the preset inclination value, if the moving speed measurement value of the main body 10 is equal to or greater than the preset speed value, the braking step S5 is performed.

That is, the first judging step S2 and the second judging step S4 are performed independently of each other, and if a predetermined condition is satisfied, the first judging step S2 and the second judging step S4 are moved to the braking step S5.

The braking step S5 is a step of reducing the rotational speed of the main wheel 20 by operating the deceleration part 32. In the braking step S5, the deceleration part 32 is the main wheel 20. It is periodically contacted repeatedly to reduce the rotational speed of the main wheel (20).

The present invention consisting of the above configuration is operated as a specific example as follows.

The user turns on the brake unit 30 to be operated.

When the wheelchair moves downhill, the inclination sensor 31 measures the inclination of the downhill road.

The controller 33 does not operate the deceleration part 32 when the inclination measurement value measured by the inclination sensor 31 is less than a preset inclination value, and when the measured value is greater than or equal to a preset inclination value, the deceleration part 32. ).

That is, the controller 33 drives the motor 32a, and the eccentric member 32b also rotates by the rotation of the motor 32a.

In addition, as the eccentric member 32b rotates, the connecting member 32c connected to the other end of the eccentric member 32b reciprocates, whereby the friction part 32d periodically repeats the main. In contact with the wheel 20 to reduce the rotational speed of the main wheel 20.

On the other hand, the control unit 33 does not operate the deceleration unit 32 when the moving speed measurement value measured by the speed sensor 34 is less than a preset speed value, and the deceleration when the measured value is more than a preset speed value. Operate section 32.

When the wheelchair is downhill by the speed sensor 34 as described above, if the moving speed is large, the deceleration part 32 can be operated so that the user can safely descend downhill on the wheelchair.

The passive wheelchair equipped with the automatic brake device according to the present invention is not limited to the above-described embodiment, and can be variously modified and implemented within the scope of the technical idea of the present invention.

10: main body, 15: guide rail, 20: main wheel, 30: brake part, 31: tilt sensor, 32: deceleration part, 32a: motor, 32b: eccentric member, 32c: connection member, 32d: friction part, 33: Control unit, 34: speed sensor, 35: battery, 36: shelf, 37: permanent magnet,
S1: slope measurement step, S2: first determination step, S3: speed measurement step, S4: second determination step, S5: braking step.

Claims (8)

A main body folded in the left and right directions; Main wheels mounted on both sides of the main body; Is mounted to the main body is made to include a brake to reduce the rotational speed of the main wheel,
The brake unit includes:
An inclination sensor for measuring an inclination of the main body; A reduction unit for reducing the rotation speed of the main wheel; A control unit which reduces the rotational speed of the main wheel by operating the deceleration unit according to the measured value of the inclination sensor; A battery for supplying power to the inclination sensor, the reduction unit and the control unit; A speed sensor for measuring a moving speed of the main body; It includes a shelf on which the reduction unit or the battery is mounted,
The control unit may reduce the rotational speed of the main wheel by operating the deceleration unit if the measured value of the inclination sensor is an inclination value that does not operate the deceleration unit. ,
The main wheel is equipped with a permanent magnet, the speed sensor is mounted to the main body is made of a Hall sensor for detecting the rotating permanent magnet,
Guide rails are mounted to the front and rear directions long on both sides of the central portion folded in the left and right directions from the main body,
The shelf is a manual wheelchair equipped with an automatic brake device, characterized in that sliding along the guide rail is detachably mounted to the main body. delete The method according to claim 1,
The deceleration unit is a manual wheelchair equipped with an automatic brake device, characterized in that to periodically and repeatedly contact the main wheel by the control unit to reduce the rotational speed of the main wheel. The method of claim 3,
Wherein,
A motor;
An eccentric member having one end coupled to a rotation shaft of the motor and the other end eccentric with the rotation shaft of the motor;
A connecting member having one end connected to the other end of the eccentric member;
Is connected to the other end of the connecting member, and comprises a friction portion selectively contacted with the main wheel,
The connection member is moved by the rotation of the eccentric member by the motor for the manual wheelchair with a brake system, characterized in that the friction portion to periodically contact the main wheel repeatedly. delete delete delete delete

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