Assistive device and control method thereof

1. An assistive device, comprising:

a first assembly, including:

a body used against a user and having a plate shape for the user to sit on;

a plug set; and

a connecting element having a plurality of holes for receiving the plug set;

a second assembly for fixing the assistive device to shank of user, comprising:

a body;

a slot; and

a brace comprising:

a fastener having a penetration hole for receiving the body of the second assembly; and

a lever with a cam against the body of the second assembly to fix the brace on the body of the second assembly; and

a third assembly for connecting the connecting element of the first assembly and the second assembly, and for powering the second assembly, comprising:

a rotating module having a clip module comprising a receiving space for receiving the body of the second assembly, wherein the clip module is for clipping the slot of the body of the second assembly to connect the third assembly with the second assembly;

wherein a distance between the first assembly and the third assembly is adjustable by inserting the plug set in different holes.

2. The assistive device of claim 1 , wherein the plug set includes two plugs.

3. The assistive device of claim 1 , wherein the body of the second assembly is configured to be extended from a lateral shank of the user to a front shank of the user.

4. A control method for the assistive device of claim 1 , comprising:

configuring, by a micro controller unit (MCU) of the assistive device, a driving unit of the assistive device to be operated under a training mode;

wherein the training mode includes an isokinetic mode, an isotonic mode or an isometric mode.

5. The control method of claim 4 , wherein the training mode include the isokinetic mode, and the control method further comprises:

determining, by the MCU of the assistive device, whether a rotation speed of the second assembly is greater than a threshold;

providing, by the driving unit of the third assembly, a dynamic assistive force against an external force for keeping the rotation speed as the threshold when the rotation speed of the second assembly is greater than the threshold.

6. The control method of claim 4 , wherein the training mode include the isotonic mode, and the control method further comprises:

providing, by the driving unit of the third assembly, a static assistive force against an external force.

7. The control method of claim 4 , wherein the training mode include the isometric mode, and the control method further comprises:

locking, by the driving unit of the assistive device, an angle between the second assembly and the third assembly; and

detecting, by the driving unit of the assistive device, an external force against the second assembly.