Abstract: The shock absorbing device for ankle and knee joints may include a shoe part; a weight dispersing pad part configured to accommodate a user's leg inserted therein; a piston unit including a plurality of pistons respectively connected to upper portions of the shoe part in a vertical direction and configured to be moved upwards and downwards; and a damper part connected between the piston unit and the weight dispersing pad part, wherein the damper part has an annular shape so as to be connected to the weight dispersing pad part along the circumference of the weight dispersing pad part, the pistons are inserted into an internal space of the damper part, and the damper part performs a damping operation through oil stored in the internal space of the damper part according to the upward/downward movement of the piston.

Abstract: A transformable wheel includes a wheel frame including a plurality of contact portions and a plurality of recessed portions. A plurality of transforming members is provided wherein one side of each transforming member is rotatably coupled to a corresponding one of the recessed portions and an outer surface of each transforming member forming a portion of the wheel frame. A rotating member is provided at one side surface of the wheel frame, and includes a plurality of transformation locking members arranged radially from the central axis of the wheel frame to correspond to the plurality of transforming members, respectively. A driving member is configured to rotate the rotating members by a preset angle about the central axis of the wheel frame.

Abstract: The present disclosure relates to a surface roughness sensor apparatus. The surface roughness sensor apparatus includes: a rotatable rotation shaft; a piezoelectric sensor provided along a circumference of the rotation shaft, rotated by rotation of the rotation shaft, and configured to generate a sensing signal in response to a pressure applied by a surface of an object as being in direct contact with the surface of the object; and a signal transfer unit configured to transfer the sensing signal generated and transmitted by the piezoelectric sensor to the outside of the sensor apparatus, and the piezoelectric sensor may be rotated in a direction in which a relative movement between the piezoelectric sensor and the surface of the object is made at a contact point with the object to minimize damage to the surface of the object.

Abstract: The present disclosure suggests a conveyor system. A conveyor system in accordance with an exemplary embodiment of the present disclosure includes: a plurality of transportation modules; a front conveyer including a multiplicity of conveyors, which are driven at a first speed, arranged side by side to be in parallel to each other and configured to transfer the transportation modules; and a central conveyor driven at a second speed, provided adjacent to an end portion of the front conveyor and configured to transfer the transportation modules transferred from the front conveyor.

Abstract: The shock absorbing device for ankle and knee joints may include a shoe part; a weight dispersing pad part configured to accommodate a user's leg inserted therein; a piston unit including a plurality of pistons respectively connected to upper portions of the shoe part in a vertical direction and configured to be moved upwards and downwards; and a damper part connected between the piston unit and the weight dispersing pad part, wherein the damper part has an annular shape so as to be connected to the weight dispersing pad part along the circumference of the weight dispersing pad part, the pistons are inserted into an internal space of the damper part, and the damper part performs a damping operation through oil stored in the internal space of the damper part according to the upward/downward movement of the piston.

Abstract: A transformable wheel includes a wheel frame including a plurality of contact portions and a plurality of recessed portions. A plurality of transforming members is provided wherein one side of each transforming member is rotatably coupled to a corresponding one of the recessed portions and an outer surface of each transforming member forming a portion of the wheel frame. A rotating member is provided at one side surface of the wheel frame, and includes a plurality of transformation locking members arranged radially from the central axis of the wheel frame to correspond to the plurality of transforming members, respectively. A driving member is configured to rotate the rotating members by a preset angle about the central axis of the wheel frame.

Abstract: The present disclosure suggests a conveyor system. A conveyor system in accordance with an exemplary embodiment of the present disclosure includes: a plurality of transportation modules; a front conveyer including a multiplicity of conveyors, which are driven at a first speed, arranged side by side to be in parallel to each other and configured to transfer the transportation modules; and a central conveyor driven at a second speed, provided adjacent to an end portion of the front conveyor and configured to transfer the transportation modules transferred from the front conveyor.

Abstract: The present disclosure relates to a surface roughness sensor apparatus. The surface roughness sensor apparatus includes: a rotatable rotation shaft; a piezoelectric sensor provided along a circumference of the rotation shaft, rotated by rotation of the rotation shaft, and configured to generate a sensing signal in response to a pressure applied by a surface of an object as being in direct contact with the surface of the object; and a signal transfer unit configured to transfer the sensing signal generated and transmitted by the piezoelectric sensor to the outside of the sensor apparatus, and the piezoelectric sensor may be rotated in a direction in which a relative movement between the piezoelectric sensor and the surface of the object is made at a contact point with the object to minimize damage to the surface of the object.