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US 11,584,416 B2Granted
Handle assembly having power assist function for carts and cart comprising the same
AssigneeLG Electronics Inc.
InventorsJaecheon Sa, Sunryang Kim, Keunsik No
Life of this patent
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Abstract
A handle assembly for a cart with a power assist function can sense the direction that a user's force is applied, and provide assist power in the corresponding direction, such that the user can easily move the cart. A cart including the handle assembly allows the user to conveniently move the cart.
Claims20
A handle assembly for a cart, the handle assembly comprising:
- a handle bar locatable at one side of the cart to receive an external force applied in a movement direction of the cart;
- and
- a force sensing assembly including:
- a moving frame disposed inside the handle bar in a longitudinal direction of the handle bar, the moving frame having two surfaces facing each other;
- a spring having a first end coupled at an interior of the handle bar and a second end extending adjacent to the moving frame, the spring configured to be pressed and deformed by the moving frame in the direction of the external force applied to the handle bar;
- a magnet coupled to the second end of the spring or a lower side of the moving frame;
- a Hall sensor located adjacent to the magnet to detect a position of the magnet;
- and
- a sensor printed circuit board (PCB) for determining the direction of the external force based on the detected position of the magnet from the Hall sensor,
- wherein the Hall sensor is mounted to the sensor PCB, and
- wherein the spring includes a spring body which is plate-shaped and extends parallel to the side surfaces of the moving frame.
8 more elements
A handle assembly for a cart, the handle assembly comprising:
- a handle bar locatable at one side of the 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 the direction of the external force applied to the handle bar;
- and
- a force sensor located adjacent to the frame support to sense a movement direction of the frame support,
- wherein the frame support comprises:
- a pair of cover pads disposed on the handle bar;
- and
- a spring configured to be pressed and deformed by the external force applied to the handle bar,
- wherein the spring includes a spring body which is plate-shaped and extends parallel to the cover pads.
8 more elements
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 disposed on the handle bar and movable in the direction of the external force applied to the handle bar;
- a force sensor disposed adjacent to the frame support to sense the movement direction of the frame support;
- a moving frame;
- and
- a spring,
- wherein the controller is configured to transmit the electric power generated from the driver to the wheel according to the movement direction of the frame support sensed by the force sensor, and
- wherein the spring includes a spring body which is plate-shaped and extends parallel to the side surfaces of the moving frame.
12 more elements
Dependencies are inferred from the claim text.