Rehabilitation exercise device for upper and lower limbs

1. A rehabilitation exercise device for upper and lower limbs, the rehabilitation exercise device comprising:

a first support configured to support a user's hand or foot;

a second support configured to support a user's forearm or calf;

a pair of first hinges rotatably connecting the first support and the second support to each other;

a third support configured to support a user's upper arm or thigh;

a pair of second hinges rotatably connecting the second support and the third support to each other; and

a drive module selectively mounted on any one of the pair of first hinges and the pair of second hinges, and configured to pivot the first support or the second support,

wherein the drive module comprises:

a body housing in which a drive motor is accommodated;

a drive shaft to which a rotary shaft of the drive motor is connected; and

a ring member provided on an outer periphery of the body housing,

wherein each of the first hinges or each of the second hinges comprises:

a ring coupling portion to which the ring member is coupled; and

a hinge shaft with which the drive shaft is meshed.

2. The rehabilitation exercise device of claim 1 , wherein each of the first hinges or each of the second hinges comprises a rotary shaft hole configured to receive the drive shaft of the drive module; and

the drive module comprises the drive shaft passing through the rotary shaft hole and coupled to the first support or the second support when the drive module is mounted on one of the first hinges or one of the second hinges, the drive shaft thus pivoting the first support or the second support.

3. The rehabilitation exercise device of claim 2 , wherein the first support or the second support comprises:

a shaft coupling bracket extending toward the rotary shaft of the drive motor; and

a drive shaft fixing member fixing the drive shaft inserted through the rotary shaft hole to the shaft coupling bracket.

4. The rehabilitation exercise device of claim 3 , wherein the drive shaft has a polygonal shape in cross-section; and

the drive shaft fixing member comprises a polygonal fixing hole having a polygonal inner diameter corresponding to the cross-sectional shape of the drive shaft.

5. The rehabilitation exercise device of claim 4 , wherein the drive shaft fixing member comprises:

a bracket fastening portion provided at a first side thereof with respect to the polygonal fixing hole, and fastened to the shaft coupling bracket; and

a pair of tightening members provided at a second side thereof with respect to the polygonal fixing hole at positions spaced apart from each other,

wherein in a state in which the drive shaft is inserted into the polygonal fixing hole, the pair of tightening members are approached to each other, so that the drive shaft inserted into the polygonal fixing hole is tightened and fixed.

6. The rehabilitation exercise device of claim 5 , wherein the bracket fastening portion is fastened to the shaft coupling bracket through bolt fastening.

7. The rehabilitation exercise device of claim 4 , wherein any one of the pair of tightening members comprises a first tightening hole passing through a side thereof; and

a remaining one of the pair of tightening members comprises a second tightening hole for fastening a tightening bolt passing through the first tightening hole so as to adjust a distance between the pair of tightening members.

8. The rehabilitation exercise device of claim 3 , wherein each of the first hinges or each of the second hinges comprises:

a first rotary part configured to be rotated in conjunction with the first support or the second support in response to rotation of the drive shaft; and

a second rotary part configured to be freely rotatable with respect to the first rotary part,

wherein the first rotary part and the second rotary part are coaxially coupled around the rotary shaft hole; and

the first rotary part is axially coupled to the shaft coupling bracket to be rotated relative to the second rotary part in conjunction with rotation of the drive shaft.

9. The rehabilitation exercise device of claim 3 , wherein the shaft coupling bracket comprises:

a bracket coupling hole formed corresponding to the rotary shaft hole, and allowing passage of the drive shaft passing through the rotary shaft hole; and

a plurality of rotation synchronization holes passing through a plate surface of the shaft coupling bracket along an outer periphery of the bracket coupling hole,

wherein the first rotary part further comprises a rotation synchronization protrusion inserted into each of the rotation synchronization holes when the shaft coupling bracket is fastened to the first rotary part, and allowing the first rotary part to be rotatable in conjunction with rotation of the shaft coupling bracket.

10. The rehabilitation exercise device of claim 1 , further comprising:

a mounting protrusion formed on the ring member; and

a catching portion formed on the ring coupling portion, and configured such that when the ring member is rotated and coupled to the ring coupling portion, the mounting protrusion is rotated and fitted into the catching portion.

11. The rehabilitation exercise device of claim 1 , further comprising:

a catching lever provided on the body housing, and configured to restrain rotation of the ring member by being inserted into the ring member.

12. The rehabilitation exercise device of claim 1 , wherein the drive shaft and the hinge shaft respectively comprise pluralities of jaws that circumferentially alternately protrude and are meshed with each other.

13. The rehabilitation exercise device of claim 12 , wherein each of the jaws is configured such that opposite sides thereof are inclined.

14. The rehabilitation exercise device of claim 1 , further comprising:

an elastic member provided on any one of the drive shaft and the hinge shaft, and configured to generate an elastic force acting on a remaining one of the drive shaft and the hinge shaft so that the drive shaft and the hinge shaft are connected to each other.