Exercise assistance device including slider in which balls are accomodated
An exercise assistance device may include: a proximal support part for supporting a proximal portion of a user; a distal support part for supporting a distal portion of the user; an actuator, which is connected to the proximal support part and generates power; a driving frame for transmitting the power from the actuator to the distal support part; a slider housing, which is connected to the distal support part and has a sliding space; a slider that is slidable in the sliding space; a connector for connecting the slider and the driving frame; and a plurality of balls, which are accommodated in the slider, can rotate by at least two degrees of freedom with respect to the slider, and can make point-contact with the slider housing.
1 . A wearable exercise assistance device comprising:
a proximal support configured to support a proximal portion of a user;
a distal support configured to support a distal portion of the user;
an actuator connected to the proximal support and configured to generate power;
a driving frame configured to transmit power from the actuator to at least the distal support;
a slider housing connected to the distal support and comprising a sliding space;
a slider slidably provided in the sliding space;
a connector configured to connect the slider and the driving frame; and
a plurality of balls accommodated in the slider, rotatably provided by at least two degrees of freedom with respect to the slider, and point-contactable with the slider housing.
2 . The exercise assistance device of claim 1 , wherein the plurality of balls comprise a first ball and a second ball, and wherein the first ball comprises a first exposed part and a second exposed part that are exposed to an outside of the slider and in point-contact with the slider housing,
wherein the first exposed part and the second exposed part are provided on opposite sides of each other based on the slider.
3 . The exercise assistance device of claim 2 , wherein the slider housing comprises:
an inner cover configured for contacting the distal portion of the user and comprising a first contact surface facing a first surface of the slider;
an outer cover connected to the inner cover and comprising a second contact surface facing a second surface of the slider; and
a connector accommodating hole formed in the outer cover and configured to accommodate the connector.
4 . The exercise assistance device of claim 3 , wherein the first exposed part is point-contactable with the first contact surface and the second exposed part is point-contactable with the second contact surface.
5 . The exercise assistance device of claim 4 , wherein a minimum distance between the first contact surface and the second contact surface is the same as a diameter of the ball.
6 . The exercise assistance device of claim 5 , wherein the ball is configured to maintain a state of contacting the first contact surface and the second contact surface at the same time.
7 . The exercise assistance device of claim 3 , wherein the slider housing comprises a cover protrusion protruding from the outer cover in a direction toward the slider.
8 . The exercise assistance device of claim 3 , wherein the connector comprises:
a connector base connected to the slider and movable in the connector accommodating hole; and
a connector body formed in a direction stacked from the connector base and connected to the driving frame.
9 . The exercise assistance device of claim 8 , wherein at least a portion of the connector body has a spherical shape.
10 . The exercise assistance device of claim 1 , wherein at least a portion of the plurality of balls is provided on opposite sides of each other based on the connector.
11 . The exercise assistance device of claim 1 , wherein the slider comprises:
a slider body comprising a ball accommodating hole that accommodates each of the plurality of balls; and
a slider cover connected to the slider body and capable of covering a portion of each of the plurality of balls.
12 . The exercise assistance device of claim 1 , further comprising:
an elastic band configured to connect the slider housing and the slider.
13 . The exercise assistance device of claim 12 , wherein the elastic band comprises:
a band body connected to the slider; and
a plurality of band legs extending from the band body and connected to the slider housing.
14 . The exercise assistance device of claim 12 , wherein the elastic band is provided in plurality, wherein at least a portion of the plurality of elastic bands is provided on opposite sides of each other based on the connector.
15 . An exercise assistance device comprising:
a proximal support configured to support a proximal portion of a user;
a distal support configured to support a distal portion of the user;
an actuator connected to the proximal support and configured to generate power;
a driving frame configured to transmit power from the actuator to at least the distal support;
a slider housing connected to the distal support and comprising a sliding space;
a slider slidably provided in the sliding space;
a connector configured to connect the slider and the driving frame; and
a plurality of rollers accommodated in the slider, rotatably provided with respect to the slider, and line-contactable with the slider housing.
16 . The exercise assistance device of claim 15 , wherein the plurality of rollers comprise first and second rollers, where at least one of the first and second rollers comprises a third exposed part and a fourth exposed part that are exposed to an outside of the slider and in line-contact with the slider housing,
wherein the third exposed part and the fourth exposed part are provided on opposite sides of each other based on the slider.
17 . The exercise assistance device of claim 16 , wherein the slider housing comprises:
an inner cover configured for contacting the distal portion of the user and comprising a third contact surface facing a third surface of the slider; and
an outer cover connected to the inner cover and comprising a fourth contact surface facing a fourth surface of the slider.
18 . The exercise assistance device of claim 17 , wherein the third exposed part is line-contactable with the third contact surface and the fourth exposed part is line-contactable with the fourth contact surface.
19 . The exercise assistance device of claim 18 , wherein a minimum distance between the third contact surface and the fourth contact surface is substantially the same as a diameter of the roller.
20 . The exercise assistance device of claim 19 , wherein the at least one of the first and second rollers is configured to maintain a state of contacting the third contact surface and the fourth contact surface at the same time.