Abstract: Disclosed is a wearable device including an outer housing including a first surface facing a first direction, a second surface facing a second direction opposite to the first direction, and a side surface surrounding a space between the first surface and the second surface, wherein a metal frame is formed on at least a portion of the side surface, a display having at least a portion that is exposed through the first surface of the outer housing, a printed circuit board (PCB), a communication circuit, and a ground area, wherein the metal frame is electrically connected to the communication circuit at a first point and a second point of the metal frame, and to the ground area at a third point having a different electrical length with respect to the first point and the second point, and wherein the communication circuit is configured to transmit and/or receive a signal in a first frequency band by a first electrical path formed between the first point and the third point, and a signal in a second frequency band

Abstract: An electronic device is provided. The electronic device includes an outer housing that comprises a first surface facing a first direction, a second surface facing a second direction opposite to the first direction, and a side surface surrounding a space between the first surface and the second surface, a display adapted to expose at least a portion of the display through the first surface of the outer housing, a PCB arranged between the second surface and the display in an interior of the outer housing, a communication circuit arranged on or over the PCB, a first conductive structure formed of at least one of the first surface or at least a portion of the side surface is electrically connected to the communication circuit, and a second conductive structure formed of the portion of the display electrically connected to the first conductive structure.

Abstract: The present invention relates to a method for designing a cycloidal gear tooth profile of a gear shift actuator, the method designing a profile to have a backlash through a change in the radius of a rolling circle of an internal or external tooth profile of a cycloidal gear, and thus enables the smooth engagement of internal teeth and external teeth, reduces the engagement range of the internal teeth and the external teeth to have excellent durability and enable power loss to be reduced, and enables the shape machining of the gear by using general cycloidal gear machining, thereby facilitating manufacturing and being capable of improving machining precision.

Abstract: The present invention relates to a charging and discharging apparatus of a battery, and more particularly, to a charging and discharging apparatus of a battery capable of evenly charging respective battery cells whose charging and discharging characteristics are different from each other because capacities and internal resistances of the respective battery cells connected to each other in series do not completely coincide with each other, in an apparatus of charging and discharging a battery in which a plurality of battery cells are connected to each other in series.

Abstract: The present invention relates to a charging and discharging apparatus of a battery, and more particularly, to a charging and discharging apparatus of a battery capable of evenly charging respective battery cells whose charging and discharging characteristics are different from each other because capacities and internal resistances of the respective battery cells connected to each other in series do not completely coincide with each other, in an apparatus of charging and discharging a battery in which a plurality of battery cells are connected to each other in series.

Abstract: A handcuff includes cheek and jaw members pivotally secured and movable between open and closed positions. Teeth are formed on the jaw member, and a locking mechanism is carried by the cheek member. The locking mechanism includes one or more primary gears having a plurality of teeth that engage the teeth of the jaw member in the closed position and rotate as the cheek and jaw members pivot. A secondary gear may be secured to and rotatable with the primary gear. A latch may pivot to releasably engage the secondary gear, to prevent the secondary and primary gears from rotating, and to prevent the cheek and jaw members from moving to the open position. The locking mechanism may include a pair of spaced-apart primary gears with the latch disposed therebetween. The jaw member and gear may be disposed in a planar layer, and the latch may be disposed outside the planar layer defined by the jaw member and gear.