WO2015030278A1 - Drive apparatus for wheelchair - Google Patents

Abstract

A drive apparatus for a wheelchair according to an embodiment of the present invention comprises: a support part rotatably fastened to a wheel; and a drive part rotatably fastened to the support part and making contact the wheel by an external force to provide a rotating force corresponding to the external force to the wheel, wherein the drive part includes a rotating shaft for rotating and a resilient member that is secured to the rotating shaft through insertion therein and has one end brought into contact with the support part, and the resilient member can be brought into contact with the wheel while being resiliently deformed by the external force and can be separated from the wheel by a restoring force due to the resilient deformation when the external force is removed.

Description

Wheelchair Drive

The present invention relates to a drive device for a wheelchair, and more particularly, to a drive device for a wheelchair to reduce the consumption of physical strength and enhance the effect of stability by making it simpler and easier in the movement operation of the wheelchair.

In general, a wheelchair is a structure that is used as a means for carrying out the external and internal activities of the disabled when the legs are weak or lost.

Such a wheelchair is basically a chair frame for a disabled person, a driving wheel mounted at both rear ends of the chair frame, and an auxiliary wheel having a smaller diameter than the driving wheel and mounted at both front ends of the chair frame, respectively. Along the frame, the outer ring of the left and right drive wheels is provided with a drive ring, respectively.

The conventional wheelchair as described above may be implemented by pushing and pulling the driving ring back and forth with both hands to move the front and rear sitting in the chair frame, the person with a disability may be switched by the auxiliary wheel.

However, in the conventional wheelchair, the driving ring is fixedly mounted in one-piece structure with the driving wheel while repeatedly pushing and pulling the driving ring by using two hands. There is a problem that the physical consumption is increased by being pushed and pulled directly.

In addition, since the driving ring is mounted on the outer outer ring of the driving wheel, both hands held by the dust and dirt generated as the driving wheel moves around may be soiled from time to time by the rotation of the driving wheel. There is a problem.

In addition, the user's two hands must pass through the driving wheel to grasp the driving ring as a rain, the sleeves, etc. can easily contact the driving wheel and become dirty and even damaged, and also cross the driving wheel There is a fear that the arm will be injured by the friction caused by the rotation of the drive wheel.

Therefore, in driving a wheelchair, there is an urgent need for research on a wheelchair driving device that minimizes the consumption of physical strength and at the same time minimizes the problem of hand contamination, damage and injury.

An object of the present invention relates to a drive device for a wheelchair that minimizes the consumption of physical strength for driving to improve the driving efficiency and at the same time prevent the hands necessary for driving from being soiled by foreign matters or damaged by wheels.

A driving device for a wheelchair according to an embodiment of the present invention includes a support that is fastened to the wheel to be rotatable; And a driving part rotatably coupled to the support part and contacting the wheel by an external force to provide a rotational force corresponding to the external force to the wheel, wherein the driving part is inserted into a rotation shaft for rotation and the rotation shaft. And an elastic member having one end fixed in contact with the support, wherein the elastic member is elastically deformed by the external force to be in contact with the wheel, and spaced apart from the wheel by a restoring force by elastic deformation when the external force is removed. You can do that.

In the driving device for a wheelchair according to an embodiment of the present invention, a portion in which the driving unit and the wheel are in contact with each other to implement forward and reverse rotation of the wheel may be the same.

The driving unit of the driving device for a wheelchair according to an embodiment of the present invention is a fastening part which is rotated by the external force and is in contact with the wheel and extends from the contact part so as to provide the rotation shaft of the contact part and fastened with the support part. And a connection part connecting the contact part and the fastening part to each other.

The drive unit of the wheelchair drive apparatus according to an embodiment of the present invention may include an external force applying unit extending outward to apply the external force.

The support part of the driving device for a wheelchair according to an embodiment of the present invention is bent from a side of the first support part and the first support part which is fastened to the rotating shaft of the wheel and extends outside of the wheel so as to be rotatable to the wheel. It may have a second support that extends.

The drive unit of the driving device for a wheelchair according to an embodiment of the present invention may be fastened to be rotatable with the second support unit while being disposed in an inner space provided by the second support unit.

The driving device for a wheelchair according to an embodiment of the present invention may further include a guide unit coupled to the rotating shaft of the wheel and fixed to the support unit to be rotatable therein.

The guide part of the driving device for a wheelchair according to an embodiment of the present invention may be provided with a locking part to contact the support part to limit the rotation angle of the support part.

The guide part of the driving device for a wheelchair according to an embodiment of the present invention is firstly inserted into and coupled to the rotating shaft and the second guide portion is inserted into and coupled to the rotating shaft, and the support part is disposed between the first guide parts. And a second guide part, wherein the locking part may be formed in at least one of the first guide part and the second guide part.

The first guide portion of the driving device for wheelchairs according to an embodiment of the present invention includes an insertion wall inserted into a fastening hole formed in the support portion, and the second guide portion includes an insertion corresponding wall disposed outside the insertion wall. It can be provided.

The support part of the driving device for a wheelchair according to an embodiment of the present invention includes a wear preventing wall protruding from an outer end of the fastening hole, and the wear preventing wall may be disposed between the insertion wall and the insertion corresponding wall. have.

The locking portion of the wheelchair drive device according to an embodiment of the present invention may be formed to protrude toward the rotation axis direction.

The locking portion of the driving device for a wheelchair according to an embodiment of the present invention has a detachable portion formed by increasing a width in a radial direction at least one of one side and the other end, and the support portion is detachable when contacting the engaging portion It may be provided with a detachable counter to be inserted.

The detachable counterpart of the driving device for a wheelchair according to an embodiment of the present invention may be formed to be recessed toward the inside of the support.

According to the driving device for wheelchairs according to the present invention, it is possible to maximize the driving efficiency by minimizing the consumption of physical strength for driving.

In addition, it can be implemented by a simple and easy method when applying an external force for driving.

Furthermore, it is possible to prevent the hands from being soiled by foreign matters or the like by the wheels during driving.

1 is a schematic perspective view of a wheelchair including a drive device for a wheelchair according to an embodiment of the present invention.

Figure 2 is a schematic cutaway perspective view showing a drive device for a wheelchair according to an embodiment of the present invention.

Figure 3 is a schematic exploded perspective view showing a drive device for a wheelchair according to an embodiment of the present invention.

Figure 4 is a schematic exploded perspective view showing a coupling relationship between the guide portion and the support provided in the drive device for a wheelchair according to an embodiment of the present invention.

Figure 5 is a schematic exploded perspective view showing a modification of the coupling relationship between the guide portion and the support provided in the drive device for a wheelchair according to an embodiment of the present invention.

Figure 6 is a schematic exploded perspective view showing another modification of the coupling relationship between the guide portion and the support provided in the drive device for wheelchairs according to an embodiment of the present invention.

Figure 7 is a schematic exploded perspective view showing a modification of the coupling relationship with the rotation axis of the wheel of the guide portion provided in the drive device for a wheelchair according to an embodiment of the present invention.

Figure 8 is a schematic cross-sectional view showing a state of the time when the external force is applied to the drive device for wheelchairs according to an embodiment of the present invention.

Figure 9 is a schematic cross-sectional view showing a state in which an external force is continuously applied to the drive device for wheelchairs according to an embodiment of the present invention.

10 is a schematic cross-sectional view showing a time point when the application of the external force to the drive device for wheelchairs according to an embodiment of the present invention is completed.

11 is a schematic cross-sectional view (state in which the contact portion and the wheel are in contact) and a schematic perspective view showing a modification of the contact portion of the drive unit provided in the wheelchair drive apparatus according to an embodiment of the present invention.

12 is a schematic cross-sectional view (state in which the contact portion and the wheel are in contact) and a schematic perspective view showing another modification of the contact portion of the drive portion provided in the wheelchair drive apparatus according to an embodiment of the present invention.

Figure 13 is a schematic cross-sectional view (state in which the contact portion and the wheel in contact) and a schematic perspective view showing another modification of the contact portion of the drive unit provided in the wheelchair drive device according to an embodiment of the present invention.

A driving device for a wheelchair according to an embodiment of the present invention includes a support that is fastened to the wheel to be rotatable; And a driving part rotatably coupled to the support part and contacting the wheel by an external force to provide a rotational force corresponding to the external force to the wheel, wherein the driving part is inserted into a rotation shaft for rotation and the rotation shaft. And an elastic member having one end fixed in contact with the support, wherein the elastic member is elastically deformed by the external force to be in contact with the wheel, and spaced apart from the wheel by a restoring force by elastic deformation when the external force is removed. You can do that.

Hereinafter, with reference to the drawings will be described in detail a specific embodiment of the present invention. However, the spirit of the present invention is not limited to the embodiments presented, and those skilled in the art who understand the spirit of the present invention may deteriorate other inventions or the present invention by adding, modifying, or deleting other elements within the scope of the same idea. Other embodiments that fall within the scope of the inventive concept may be readily proposed, but they will also be included within the scope of the inventive concept.

In addition, the components with the same functions within the scope of the same idea shown in the drawings of each embodiment will be described using the same reference numerals.

1 is a schematic perspective view of a wheelchair including a drive device for a wheelchair according to an embodiment of the present invention, Figure 2 is a schematic cutaway perspective view showing a drive device for a wheelchair according to an embodiment of the present invention.

In addition, Figure 3 is a schematic exploded perspective view showing a drive device for a wheelchair according to an embodiment of the present invention, Figure 4 is a coupling relationship between the guide portion and the support provided in the drive device for a wheelchair according to an embodiment of the present invention It is a schematic exploded perspective view which shows.

1 to 4, a wheelchair 10 including a wheelchair driving apparatus 100 according to an embodiment of the present invention is a wheelchair driving apparatus 100 for providing a driving force, the wheelchair driving apparatus. The wheel 100 to which the 100 is fastened, may include an auxiliary wheel 300 and a chair frame 400 for changing the direction.

Here, the wheel 200, the auxiliary wheel 300 and the chair frame 400 is a component that can be employed in a known wheelchair, a detailed description thereof will be omitted.

Wheelchair drive device 100 is a structure that can provide a driving force to the wheelchair 10 by the external force of the user, the rotational force to the support 110 and the wheel 200 is fastened so as to be rotatable to the wheel (200). It may include a driving unit 120 to provide.

In detail, the support 110 is a component for firmly fixing the drive unit 120 to the wheelchair 10, and may include a first support 112 and a second support 114.

That is, the support 110 is fastened to the rotating shaft 210 of the wheel 200 to be rotatable to the wheel 200 and the first support 112 and the first extending to the outside of the wheel 200 and the first The second support part 114 may be provided to extend from one side of the support part 112.

Here, the second support part 114 may be bent toward the outer side in the radial direction of the wheel 200 to form a predetermined internal space, and the driving unit 120 may be disposed in the internal space.

However, the first support part 112 may be formed on both sides of the second support part 114, and in this case, the first support part 112 may be fastened to both sides of the wheel 200. .

On the other hand, the support 110, that is, the first support 112 is to be fastened to the rotary shaft 210 via the guide portion 130 fastened to the rotary shaft 210 to be rotatable to the wheel 200. Can be.

That is, the guide part 130 may be a structure that is coupled to the rotation shaft 210 and fixed, and allows the support part 110 to rotate therein, and includes a first guide part 132 and a second guide part ( 134).

The first guide part 132 may be inserted into and coupled to the rotation shaft 210 firstly, and the second guide part 134 may be inserted into and coupled to the rotation shaft 210 secondarily and the first guide part may be coupled to the rotation shaft 210. The support 110 may be disposed between the 132.

Here, the guide part 130 may be provided with a locking part 135 in contact with the support part 110 to limit the rotation angle of the support part 110. 1 may be formed along the outside of the guide portion 132.

That is, the locking part 135 may be continuously formed along the outer side of the first guide part 132 while protruding toward the rotation shaft 210 direction.

However, the locking portion 135 does not necessarily need to be continuously formed, and may be formed only at the limit portion of the rotation angle of the support 110.

Here, the first support part 112 of the support part 110 may be rotatable between the first guide part 132 and the second guide part 134, and the rotation range is a range in which the locking part 136 is not formed. Can be tomorrow.

A detailed description thereof will be described later with reference to FIGS. 8 to 10.

On the other hand, the locking portion 136 may be surrounded by an outer wall 138 protruding from the outside of the second guide portion 134, the outer wall 138 is a protective structure of the locking portion 136 Can work.

That is, when the first guide part 132 and the second guide part 134 are fastened, the locking part 136 is stably protected by being inserted into the outer wall 138 and at the same time, the first guide part 132. And the coupling force of the second guide portion 134 can be improved.

On the other hand, the locking portion 136 may include a detachable portion 137 formed by increasing the width in the radial direction at least one of the one side and the other end, the first support portion 112 of the support portion 110 to correspond thereto ) May include a detachable counterpart 115 to allow the detachable part 137 to be inserted into contact with the catching part 136.

The detachable correspondence part 115 may be recessed and formed toward the inside of the first support part 112 of the support part 110, and may be formed in a shape corresponding to the detachable part 137.

As a result, when the support 110 is rotated by the external force in the guide 130, the user can feel the boundary of the rotation by the insertion of the detachable portion 137 and the detachable response portion 115, thereby rotating Can improve the convenience.

Meanwhile, the first guide part 132 of the guide part 130 may include an insertion wall 133 inserted into the fastening hole H2 formed in the support part 110, and the second guide part 134 may be formed as described above. When fastened to the first guide part 132, the insertion counter wall 135 may be provided outside the insertion wall 133.

Here, the support 110 may have a wear preventing wall 116 protruding from the outer end of the fastening hole (H2), the wear preventing wall 116 is the insertion wall 133 and the insertion The wearer may be disposed between the corresponding walls 135 to minimize wear that may occur when the support 110 rotates.

As a result, the wear preventing wall 116 is to improve the performance and life of the drive device 100 for a wheelchair according to an embodiment of the present invention.

Hereinafter, the coupling relationship between the rotation shaft 210 and the guide unit 130 will be described.

The first guide part 132 and the second guide part 134 have a fixing hole (H1) in the center can be inserted into the rotating shaft 210, and after being inserted protrudes the nut (N) as a separate fastening member By fastening to the rotating shaft 210, the first guide part 132 and the second guide part 134 may be stably and firmly fixed to the rotating shaft 210.

Here, the insertion wall 133 formed in the first guide part 132 is inserted into the fastening hole H2 formed in the first support part 112, and the insertion corresponding wall 135 is inserted into the insertion wall 133. When inserted, the first support part 112 may be disposed to be rotatable between the first guide part 132 and the second guide part 134.

The driving unit 120 may be fastened so as to be rotatable with respect to the aforementioned support unit 110, and contact the wheel 200 by an external force applied to the external force applying unit 140 to obtain a rotational force corresponding to the external force. 200 may be provided.

Specifically, the drive unit 120 may be disposed to be spaced apart from the wheel 200 by the elastic member (E) when the external force is removed, the contact portion 121, the fastening portion 123 and the connecting portion 122 is provided can do.

The contact part 121 may be rotated by an external force applied to the external force applying part 140 to be in contact with the wheel 200, and the fastening part 123 may provide the pivot shaft 126 of the contact part 121. It may extend from the contact portion 121 to be fastened with the second support portion 114, which is the support portion 110.

In addition, the connection part 122 may be a component that connects the contact part 121 and the fastening part 123 to each other.

Meanwhile, the fastening part 123 may include a rotation hole H4 corresponding to the coupling hole H3 formed in the second support part 114 to provide the rotation shaft 126 of the contact part 121. .

Here, the rotation shaft connecting portion 127 may be inserted into the outer side of the rotation hole (H4), respectively, the coupling hole (H3), which is disposed on one side from the outside of the second support (114) bolt (B) After passing through the coaxial connector 127, the rotating hole (H4) and the rotating shaft 126, and again through the rotating hole (H4), the rotating shaft connecting portion 127 and the insertion hole (H3) disposed on the other side By fastening (N), the fastening part 123 may be fastened to be rotatable.

However, the combination of the fastening part 123 and the second support part 114 is not limited to the above-mentioned bolt (B) and nut (N), it will be understood that various fastening means can be applied to suit the intention of those skilled in the art. .

Here, the contact portion 121 may be fixed to the rod-like external force applying unit 140, the external force applying unit 140 may perform a handle function to provide the external force by the user's hand.

The external force applying unit 140 may be formed to be bent to the outside of the wheel 200 to prevent contact with the wheel 200 when applying the external force of the user, so that the user is driven, that is, when the external force is applied It is possible to prevent the hand from being soiled by foreign matters or the like by damage to the wheel 200.

Meanwhile, when the external force applied to the external force applying unit 140 is removed, the contact part 121 of the driving unit 120 may be disposed to be spaced apart from the wheel 200 by the elastic member E. 126 may be implemented by rotating the contact portion 121.

In detail, the elastic member E may be fastened to the pivot shaft 126, and the elastic member E may be symmetrically formed with respect to an approximately center of the fastening part 121.

At this time, both ends of the elastic member (E) may be in contact with the inner upper surface of the second support portion 114 of the support 110, the center portion may be in contact with the rear side of the fastening portion 123.

Therefore, when no external force is applied to the external force applying unit 140, the elastic member E is a force that allows the contact portion 121 to be spaced apart from the wheel 200 based on the rotation shaft 126 by its own elasticity. It can be provided, because of this, the drive device 100 for a wheelchair according to an embodiment of the present invention can be freely rotatable based on the rotation axis (210).

However, the elastic member E that provides a force to separate the contact portion 121 from the wheel 200 is not limited to the above-described shape, it will be apparent that it can be variously changed according to the intention of those skilled in the art.

Meanwhile, the wheelchair driving apparatus 100 according to an embodiment of the present invention surrounds at least a part of the support 110, that is, the second support 114, thereby protecting the support 110 from the outside and at the same time. It may further include a protection unit 150 to seek beauty.

Here, the protection unit 150 is not limited to a certain shape, it will be appreciated that various shapes can be applied according to the intention of those skilled in the art.

Figure 5 is a schematic exploded perspective view showing a modification of the coupling relationship between the guide portion and the support provided in the drive device for a wheelchair according to an embodiment of the present invention.

Referring to FIG. 5, except for the locking portion 136a formed in the guide portion 130a, the configuration and effect are the same as those of the wheelchair driving apparatus 100 described with reference to FIGS. 1 to 4, the locking portion A description other than 136a will be omitted.

The locking portion 136a to limit the rotation angle of the support 110 may be continuously formed along the inner surface of the outer wall 138a of the second guide portion 134a while protruding toward the rotation axis direction.

However, the locking portion 136a does not necessarily need to be formed continuously, and may be formed only at the limit portion of the rotation angle of the support portion ().

Figure 6 is a schematic exploded perspective view showing another modification of the coupling relationship between the guide portion and the support provided in the drive device for wheelchairs according to an embodiment of the present invention.

Referring to FIG. 6, except for the inner wall 139b formed on the guide part 130b, the structure and effects are the same as those of the wheelchair driving apparatus 100 described with reference to FIGS. 1 to 4, the inner wall A description other than 139b will be omitted.

The second guide portion 134b of the guide portion 130b may include an inner wall 139b formed to be spaced apart from the outer wall 138b on the inner side of the outer wall 138b, and thus the outer wall 138b and the outer wall 138b. A predetermined space S may be provided between the inner walls 139b.

The space S may refer to a space for inserting the engaging portion 136b formed in the first guide portion 132b when the first guide portion 132b and the second guide portion 134b are fastened to each other. The shape of the space S may be a shape corresponding to the shape of the locking portion 136b.

On the other hand, the space (S) may be partitioned on the basis of a point corresponding to one side and the other end of the locking portion (136b), the boundary portion to be partitioned formed in at least one of the one side and the other end of the locking portion (136b) The removable portion 137b may be provided with a space in which the width is increased in the radial direction so as to be stably inserted.

Figure 7 is a schematic exploded perspective view showing a modification of the coupling relationship with the rotation axis of the wheel of the guide unit provided in the drive device for a wheelchair according to an embodiment of the present invention.

Referring to FIG. 7, except for the fixing hole H1c formed in the guide part 130c, the structure and effects are the same as those of the wheelchair driving device 200 described with reference to FIGS. 1 to 4, the fixing hole is the same. Descriptions other than (H1c) will be omitted.

In addition, the guide portion 130c is noted that all of the guide portions 130a and 130b described with reference to FIGS. 5 and 6 may be applied except for the fixing hole H1c.

At least one of the guide part 130c to be inserted into the rotation shaft 210, that is, the fixing hole H1c formed in the first guide part 132c and the second guide part 134c may be formed in a polygonal shape.

That is, the fixing hole (H1c) may be formed in a shape corresponding to the nut (N) fastened to the rotating shaft 210, by inserting the nut (N) in the fixing hole (H1c) without a separate fastening member The guide portion 130c may be fixed to the rotation shaft 210 in a simple manner.

In other words, by making at least one of the fixing holes H1c formed in the first guide part 132c and the second guide part 134c into a polygonal shape and inserting the nut N fastened to the rotation shaft 210. The rotating shaft 210 and the first guide part 132c and the second guide part 132c may be fastened to each other.

Figure 8 is a schematic cross-sectional view showing a state of the time when the external force is applied to the drive device for a wheelchair according to an embodiment of the present invention, Figure 9 is an external force continuously to the drive device for a wheelchair according to an embodiment of the present invention 10 is a schematic cross-sectional view showing an applied state, and FIG. 10 is a schematic cross-sectional view showing a time point at which an external force is applied to the driving device for a wheelchair according to an embodiment of the present invention.

First, referring to FIG. 8, before driving the wheelchair 10, that is, before the external force F is applied to the external force applying unit 140, the contact portion 121 of the driving unit 120 is formed of the elastic member E. The elastic force keeps the spaced apart from the wheel 200.

Here, one end of the locking portion 136 formed on the guide portion 130 is maintained in contact with the first support portion 112 of the support 110, the detachable formed at one end of the locking portion 136. The part 137 maintains the state inserted into the detachable response part 115 of the first support part 112.

In this case, the user presses the external force applying unit 140 by hand to drive the wheelchair 10, and the contact part 121 of the driving unit 120 may be in contact with the wheel 200 at the moment of pressing.

Therefore, after this moment, the contact portion 121 and the wheel 200 may be interlocked with each other by the external force F applied to one side of the external force applying unit 140 and rotated based on the rotation shaft 210. Due to this, the wheelchair 10 may implement a position movement.

That is, referring to FIG. 9, after the external force F is applied to one side of the external force applying unit 140 to contact the contact portion 121 and the wheel 200 with each other, the external force applying unit 140 continues in that state. To provide an external force (F).

In this case, the wheel 200 is rotated (R) based on the rotation shaft 210 by the continuous external force (F), the rotational force of the wheel 200 may be the size corresponding to the external force (F). have.

Therefore, the wheel 200 is rotated by friction with the ground by the external force (F) is that the wheelchair 10 can be moved.

Referring to FIG. 10, after the user completes the application of the external force F through the external force applying unit 140, the support 110 is rotated by a predetermined angle with respect to the rotation shaft 210.

Here, the other end portion of the locking portion 136 formed on the guide portion 130 is in contact with the first support portion 112 of the supporting portion 110, and the detachable portion 137 formed at the other end of the locking portion 136. Is inserted into the detachable counterpart 115 of the first support part 112.

Therefore, the user can feel the boundary of the rotation by the insertion of the detachable portion 137 and the detachable response portion 115, thereby improving the convenience of the rotation.

On the other hand, the support 110 must be returned to the state shown in Figure 8 for the continuous movement of the wheelchair (10).

To this end, the support 110 has to rotate again in the opposite direction of the rotation direction in a state rotated by a predetermined angle relative to the rotation axis 210, the contact portion 121 of the drive unit 120 and the wheel 200 Should be spaced apart.

Here, the separation between the contact portion 121 and the wheel 200 may be implemented by removing the external force (F) applied to the external force applying unit 140, wherein the restoring force of the elastic member (E) can act.

After the contact part 121 and the wheel 200 are spaced apart, the user may apply an external force to the external force applying unit 140 to return to the state shown in FIG. 8, and again with reference to FIGS. 8 to 10. By repeating the described operation, the continuous movement of the wheelchair 10 can be realized.

Therefore, according to the drive device 100 for wheelchairs according to the present invention, the drive ring is not required to drive the wheelchair 10 integrally with the wheels used in the prior art, the driving efficiency is minimized by minimizing the consumption of physical strength for driving It can be maximized.

In other words, the drive device 100 for a wheelchair according to the present invention can simply drive the wheelchair 10 in an easy manner by applying the external force F to one side of the rod-shaped external force applying unit 140. By simultaneously installing the drive device 100 for wheelchairs on both wheels 200 of the wheelchair 10, the driving efficiency can be further improved.

In addition, when the user is driven by the external force applying unit 140 that is formed to be bent to the outside of the wheel 200, that is, when the external force F is applied, the hand is dirty or damaged by the wheel 200. It can prevent it beforehand.

This may be an effect of not using a conventional driving ring.

That is, since the conventional driving ring is mounted on the outer outer ring of the wheel, the user's hand holding by the dust and dirt generated while moving the wheel around the whole due to the rotation of the wheel can be dirty, The user's two hands must pass through the wheel to grasp the driving ring as a bar, and the sleeves, etc., may come into contact with the wheels and become easily soiled or even damaged, and the arms across the wheels may The friction created by the rotation could cause injury.

However, the drive device 100 for a wheelchair according to the present invention does not require a conventional driving ring for driving, which can prevent the above problems in advance.

11 is a schematic cross-sectional view (state in which the contact portion and the wheel are in contact) and a schematic perspective view showing a modification of the contact portion of the drive unit provided in the wheelchair drive apparatus according to the embodiment of the present invention.

Referring to FIG. 11, the contact portion 521 of the driving unit 520 provided in the wheelchair driving apparatus 500 may be formed to correspond to the outer surface of the wheel 200 that is rounded.

That is, the contact portion 521 and the wheel 200 may increase the contact area by the external force applied to the external force applying unit 140, and thus the frictional force between the contact portion 521 and the wheel 200 is increased. Can improve.

Therefore, the driving efficiency of the external force applied to the external force applying unit 140 may be increased.

However, the part which is formed to be round is not only the contact part 521 but also the connection part 522 or the fastening part 523.

12 is a schematic cross-sectional view (state in which the contact portion and the wheel are in contact) and a schematic perspective view showing another modification of the contact portion of the drive portion provided in the wheelchair drive apparatus according to an embodiment of the present invention.

Referring to FIG. 12, the contact portion 621 of the driving unit 620 provided in the driving device 600 for a wheelchair may be formed to be bent toward the wheel 200.

Therefore, when the external force is applied to the contact unit 621 to the wheel 200 by applying an external force to the external force applying unit 140, the contact can be implemented with less force than the embodiment described with reference to FIGS.

Therefore, the driving efficiency of the external force applied to the external force applying unit 140 may be increased.

13 is a schematic cross-sectional view (state in which the contact portion and the wheel are in contact) and a schematic perspective view showing another modified example of the contact portion of the drive portion provided in the wheelchair drive apparatus according to an embodiment of the present invention.

Referring to FIG. 13, the contact portion 721 of the driving unit 720 provided to the driving device for a wheelchair 700 is formed to be bent toward the wheel 200 and to correspond to the outer surface formed to be rounded of the wheel 200. The hole can be provided.

That is, the contact area 721 and the wheel 200 may increase the contact area by the external force applied to the external force applying unit 140, and thus the frictional force between the contact unit 721 and the wheel 200 Can improve.

Therefore, the driving efficiency of the external force applied to the external force applying unit 140 may be increased, and in order to increase the contact area between the contact unit 721 and the wheel 200, the groove of the groove having a sealed structure in addition to the aforementioned hole may be increased. It is clear that the shape may be implemented.

In the above description of the configuration and features of the present invention based on the embodiment according to the present invention, the present invention is not limited thereto, and various changes or modifications can be made within the spirit and scope of the present invention. It will be apparent to those skilled in the art that such changes or modifications fall within the scope of the appended claims.

Claims (14)

A support part fastened to the wheel so as to be rotatable; And And a driving part which is fastened to the support part so as to be rotatable and contacts the wheel by an external force to provide a rotational force corresponding to the external force to the wheel. The driving unit includes a rotation shaft for rotation and an elastic member inserted into and fixed to the rotation shaft and having one end in contact with the support portion. The elastic member is elastically deformed by the external force to be in contact with the wheel and the wheelchair drive device to be spaced apart from the wheel by the restoring force by the elastic deformation when the external force is removed. The method of claim 1, The drive unit and the wheel contact portion for implementing the forward and reverse rotation of the wheel contact each other the same device. The method of claim 1, The driving part is provided with a contact part rotated by the external force to contact the wheel, a fastening part extending from the contact part to be coupled to the support part to provide the pivot shaft of the contact part, and a connection part connecting the contact part and the fastening part to each other. Wheelchair drive. The method of claim 1, The driving unit is a wheelchair drive device having an external force applying unit extending outward to apply the external force. The method of claim 1, The support part is a wheelchair drive device including a second support part which is fastened from one side of the first support part and the first support part which is fastened to the rotating shaft of the wheel and extends outward of the wheel so as to be rotatable to the wheel. The method of claim 5, The drive unit is a wheelchair drive device is fastened so as to be rotatable with the second support is disposed in the inner space provided by the second support. The method of claim 1, And a guide part coupled to the rotating shaft of the wheel and fixed to the support part to be rotatable therein. The method of claim 7, wherein The guide part is a wheelchair drive device having a locking portion in contact with the support portion to limit the rotation angle of the support portion. The method of claim 8, The guide part includes a first guide part inserted into and coupled to the rotation shaft primarily, and a second guide part inserted and coupled to the rotation shaft secondly and arranged so that the support part is disposed between the first guide parts. The locking portion is a wheelchair drive device formed on at least one of the first guide portion and the second guide portion. The method of claim 9, The first guide portion has an insertion wall inserted into the fastening hole formed in the support portion, the second guide portion is a wheelchair drive device having an insertion corresponding wall disposed on the outside of the insertion wall. The method of claim 10, The support portion has a wear preventing wall protruding from the outer end of the fastening hole, The wear preventing wall is a wheelchair drive device disposed between the insertion wall and the insertion corresponding wall. The method of claim 8, The locking portion is a wheelchair drive device protruding toward the rotation axis direction. The method of claim 8, The engaging portion has a detachable portion formed by increasing the width in the radial direction at least one of the one side and the other end, The support unit is a wheelchair drive device having a detachable response portion for inserting the detachable portion when contacting the engaging portion. The method of claim 13, The detachable counterpart is a wheelchair drive device formed to be recessed toward the inside of the support.

Images