Handle assembly for cart with power assist function and cart having the same

A handle assembly for a cart, the handle assembly comprising:

• a handle bar locatable at one side of a cart to receive an external force applied in a movement direction of the cart;
• and
• a force sensing assembly including:
• a frame support provided on the handle bar and movable in a direction of the external force applied to the handle bar;
• and
• a force sensor located adjacent to the frame support to sense the direction of movement of the frame support and categorize the magnitude of the external force applied to the frame support into a plurality of stages to sense the external force.

A cart comprising:

• a main body including:
• a driver to generate electric power;
• and
• a controller configured to control the driver;
• a wheel coupled to a lower portion of the main body to move the main body;
• a handle bar provided at one side of the main body to receive an external force applied in a movement direction of the main body;
• and
• a force sensing assembly including:
• a frame support provided on the handle bar and movable in a direction of the external force applied to the handle bar;
• and
• a force sensor located adjacent to the frame support to sense the direction of movement of the frame support and categorize the magnitude of the external force applied to the frame support into a plurality of stages to sense the external force,
• wherein the controller is configured to transfer the electric power generated by the driver to the wheel according to the direction of movement of the frame support sensed by the force sensor.