Disclosed are a rotary knob lock, a maintenance tool and an LED display. The rotary knob lock includes a lock body, the lock body includes a head part and a limit part, a diameter of the head part is larger than a diameter of the limit part, the head part is provided with a first magnet, the limit part is provided with a limit block; the maintenance tool includes a body, the body is provided with a second magnet inside, the second magnet and the first magnet of the rotary knob lock are magnetically attracted to each other; the LED display includes an LED display module and a cabinet, the LED display module is provided with a rotary knob lock, the cabinet is provided with an avoidance hole, when the LED display module is mounted on the cabinet, the first magnet and limit block are located on both sides.

Disclosed are a rotary knob lock, a maintenance tool and an LED display. The rotary knob lock includes a lock body, the lock body includes a head part and a limit part, a diameter of the head part is larger than a diameter of the limit part, the head part is provided with a first magnet, the limit part is provided with a limit block; the maintenance tool includes a body, the body is provided with a second magnet inside, the second magnet and the first magnet of the rotary knob lock are magnetically attracted to each other; the LED display includes an LED display module and a cabinet, the LED display module is provided with a rotary knob lock, the cabinet is provided with an avoidance hole, when the LED display module is mounted on the cabinet, the first magnet and limit block are located on both sides.

A hat holder for effectively holding a hat in a manner and position simulating the position that the hat would take when placed on a person's head, effectively displaying the front portion of the hat and maintaining the shape of the hat without leaving any marks on the hat. The device includes a magnet that creates a magnetic bond with the ferrous part of the hat, a general hat form being additional support for maintaining the general shape of a hat, an arm that connects from the support structure to the base and a base which allows the hat to be supported from various support structures including but not limited to a vertical wall surface or the like with the orientation enabling the hat to be positioned generally in the attitude that the hat would assume when placed on a person's head.

A hat holder for effectively holding a hat in a manner and position simulating the position that the hat would take when placed on a person's head, effectively displaying the front portion of the hat and maintaining the shape of the hat without leaving any marks on the hat. The device includes a magnet that creates a magnetic bond with the ferrous part of the hat, a general hat form being additional support for maintaining the general shape of a hat, an arm that connects from the support structure to the base and a base which allows the hat to be supported from various support structures including but not limited to a vertical wall surface or the like with the orientation enabling the hat to be positioned generally in the attitude that the hat would assume when placed on a person's head.

This disclosure describes a rotational coupling mechanism for releasably coupling a device to a mounting platform. In one example, a user may nest a device within the mounting platform and perform a single rotation of the nested device to toggle between a locked position and an unlocked position. The user may continue the single rotation of the nested device, in the same clockwise or anticlockwise direction, to toggle the device from the unlocked position and back to the locked position. In a locked position, the device is restricted from translation relative to the mounting platform, however, the device may continue to rotate in a clockwise or counterclockwise direction to toggle between a locked and unlocked position. In an unlocked position, the device may disengage freely from the mounting platform and is thus subsequently free to move in any translational direction or about any rotational axis.

This disclosure describes a rotational coupling mechanism for releasably coupling a device to a mounting platform. In one example, a user may nest a device within the mounting platform and perform a single rotation of the nested device to toggle between a locked position and an unlocked position. The user may continue the single rotation of the nested device, in the same clockwise or anticlockwise direction, to toggle the device from the unlocked position and back to the locked position. In a locked position, the device is restricted from translation relative to the mounting platform, however, the device may continue to rotate in a clockwise or counterclockwise direction to toggle between a locked and unlocked position. In an unlocked position, the device may disengage freely from the mounting platform and is thus subsequently free to move in any translational direction or about any rotational axis.

A system for carrying or using a device includes the device and at least one attachment apparatus. The device may include at least one attachment element. The attachment apparatus may include a length of material and at least one attachment point arranged on an end of the length of material. The at least one attachment point may include at least one magnetic feature configured to attach and detach the device and the length of material. The material can include but is not limited to cloth, metallic (magnetic and non-magnetic), fibrous material, and so forth.

A system for carrying or using a device includes the device and at least one attachment apparatus. The device may include at least one attachment element. The attachment apparatus may include a length of material and at least one attachment point arranged on an end of the length of material. The at least one attachment point may include at least one magnetic feature configured to attach and detach the device and the length of material. The material can include but is not limited to cloth, metallic (magnetic and non-magnetic), fibrous material, and so forth.

A surgical robotic system that includes a surgical table that is configured to hold a patient and a magnetic latch. The magnetic latch has a ferromagnetic plate, a permanent magnet that produces a first magnetic field and that attracts the ferromagnetic plate to thereby couple a robotic arm to the surgical table, and a cancelling coil, which when energized, produces a second magnetic field that opposes the first magnetic field to thereby uncouple the robotic arm from the surgical table.

A surgical robotic system that includes a surgical table that is configured to hold a patient and a magnetic latch. The magnetic latch has a ferromagnetic plate, a permanent magnet that produces a first magnetic field and that attracts the ferromagnetic plate to thereby couple a robotic arm to the surgical table, and a cancelling coil, which when energized, produces a second magnetic field that opposes the first magnetic field to thereby uncouple the robotic arm from the surgical table.