Abstract: The inventive concept relates to a wearable hand robot mounted on a finger to bend the finger by an external force transmitted through a wire. The wearable hand robot is capable of preventing an injury to a user's hand by the wire, achieving simplification of the structure of a finger cap and an improvement in a wearing sensation, and stably moving the finger while having a tactile sensation.

Abstract: Provided are a slider-type wire driver for under-actuation and a glove-type wearable robot including the same. In particular, provided are a slider-type wire driver for under-actuation that has a structure suitable for actuating a robot in an under-actuation manner, has a simple structure, and enables effective operation, and a glove-type wearable robot including the same. A slider-type wire driver for under-actuation and a glove-type wearable robot including the same according to embodiments of the present disclosure, can effectively reduce friction between the tendon and the surrounding structure thereof, facilitating the operation of the under-actuation robot and improving the lifespan thereof. In addition, in the case of the slider-type wire driver for under-actuation and a glove-type wearable robot including the same according to the present disclosure, an actuator that applies tension to the tendon for under-actuation can be manufactured at a low price.

Abstract: The inventive concept relates to a wearable hand robot mounted on a finger to bend the finger by an external force transmitted through a wire.

Abstract: There is provided a flat type piezoelectric ultrasonic motor for generating a rotation force to a rotor by ultrasonic vibrations. In the piezoelectric ultrasonic motor, a vibrator is formed of elastic material at a given size, a plurality of piezoelectric plates are attached on the vibrator, a rotor is drivingly connected to the vibrator thereby to be rotated, and a power source unit applies driving voltages to the piezoelectric plates. The piezoelectric plates are arranged on quartered surface areas of the vibrator in such a way that longitudinal axes of neighboring piezoelectric plates form a given angle therebetween and opposing piezoelectric plates have opposite polarizations, and the power source unit applies alternating driving voltages to the piezoelectric plates thereby to make the rotor rotated, thereby making it possible to simplify the piezoelectric plates' shape, minimize its size and enhance its driving efficiency.

Abstract: Provided is a compact lens module which enables zoom and auto-focus functions even in a small lens module by providing a lens carrying structure using a supersonic driving unit. A lens unit is positioned in a case and has at least one lens. A carrying member is rotatably connected in the case and connected to the lens unit so that the lens unit may move forward and backward. In addition, a driving unit is mounted in the case for transferring a driving force to the carrying member so as to move the lens unit by repeatedly contacting and non-contacting with the carrying member.

Abstract: Provided is a compact lens module which enables zoom and auto-focus functions even in a small lens module by providing a lens carrying structure using a supersonic driving unit. A lens unit is positioned in a case and has at least one lens. A carrying member is rotatably connected in the case and connected to the lens unit so that the lens unit may move forward and backward. In addition, a driving unit is mounted in the case for transferring a driving force to the carrying member so as to move the lens unit by repeatedly contacting and non-contacting with the carrying member.

Abstract: A non-formaldehyde polymerization-crosslinking treatment for cotton or other cellulose-containing fabrics resulting in a fabric with good durable press, wrinkle recovery, and other mechanical properties. Unsaturated monomers having two or more carboxyl groups are used in a polymerization-crosslinking treatment at a pH below about 3. The preferred system uses maleic acid and itaconic acid comonomers, potassium persulfate as a free radical initiator, and sodium hypophosphite as an esterification catalyst. A high quality durable press cotton fabric may be produced which does not release formaldehyde during processing, storage, or consumer use.