摘要:
A fixed angle hybrid centrifuge rotor includes an outer portion of composite material reinforced with fiber at least along a peripheral direction, an inner portion having stiffness less than ⅕ of stiffness of the outer portion and provided with a plurality of slots receiving specimens, and a reinforcer of composite material mounted into the slots of the inner portion, the reinforcer fabricated from material having higher stiffness than that of the inner portion and reinforced with fiber along at least peripheral direction of the slot. The reinforcer penetrates the inner portion and at least a part of the reinforcer downwardly protrudes from the inner portion. The rotor can rotate at a high speed and provides improved safety.
摘要:
The present invention relates to a method for molding rubber blocks by combining rubber chips and a urethane binder, and more specifically to a molding method for rubber blocks whereby it is possible to improve the processing time and the physical properties of the product by introducing high-temperature steam during molding. The present invention has advantageous effects in that the molding can take place in a short time without affecting the physical properties of the product even in situations involving heavy molded products, and in that there is no risk of ignition due to self-heating even if the finished products are kept stacked.
摘要:
The present invention relates to a roller board, and more particularly, to a pedal-driven roller board that converts a reciprocating motion of pedals formed on the board into a rotational motion to drive a gear, so that a user can drive the board without kicking the ground. Furthermore, the pedal-driven roller board includes a derailleur, so that a user can conveniently control the speed of the pedal-driven roller board. Moreover, a user can develop and strengthen his/her muscles by pedaling the pedal-driven roller board. To this end, a pedal-driven roller board according to the present invention includes: a handle disposed at the front side of a board to steer a front wheel; a rear wheel at the rear side of the board; and two pedals formed on the top surface of the board to drive the rear wheel. Further, the pedal-driven roller board includes: a link having an end hinged to the bottom surface of a pedal; a driving gear formed on an end of a crankshaft connected through a shaft to the other end of the link to convert a reciprocating motion of the pedal into a rotational motion; a clutch gear engaged with the driving gear to rotate, and selectively connected to one of either a first speed gear or a second speed gear to rotate same; a first connecting gear and a second connecting gear, which rotatably engage with the first speed gear and the second speed gear, respectively, and are installed on an end of a connecting shaft; a transmission gear installed on both ends of the connecting shaft and rotated by torque transmitted through the connecting shaft from the first and second connecting gears; and a rotation gear engaging with the transmission gear to rotate, and connected to the rear wheel through a rotation shaft to transmit the torque from the transmission gear to the rear wheel.
摘要:
The present invention provides an apparatus for manufacturing a truss structure using multi-point pins, a method of manufacturing a truss structure using the apparatus, a truss core sandwich panel having the truss structure, and a method of manufacturing the truss core sandwich panel. The apparatus includes a metal plate, clamps, an upper die and a lower die. The clamps hold the metal plate. The upper die has upper multi-point pins which press the metal plate downwards. The lower die has lower multi-point pins which press the metal plate upwards. The metal plate has first and second points that respectively correspond to the upper and lower multi-point pins. The first points are extended downwards by the upper multi-point pins, and the second points are extended upwards by the lower multi-point pins. Thereby, many symmetrical sides are formed in the truss structure, thus increasing the stability of the truss structure.
摘要:
The present invention relates to a method for molding rubber blocks by combining rubber chips and a urethane binder, and more specifically to a molding method for rubber blocks whereby it is possible to improve the processing time and the physical properties of the product by introducing high-temperature steam during molding. The present invention has advantageous effects in that the molding can take place in a short time without affecting the physical properties of the product even in situations involving heavy molded products, and in that there is no risk of ignition due to self-heating even if the finished products are kept stacked.
摘要:
The present invention relates to a sound converter, and, more particularly, to a sound converter which can solve a problem in that a vibration space decreases in the sound converter requiring high outputs, as the overall height of a voice coil increases.
摘要:
There are provided a unicast type network apparatus having reduced power consumption, and a data transmission and reception method thereof. The unicast type network apparatus includes: a first device allowing link quality information between the first device and a reception side to be included in a data frame and then transmitting the data frame to the reception side, at the time of transmission of data; and a second device receiving the data frame from the first device and allowing link quality information between the second device and the first device to be included in an acknowledge frame in response to the data frame and then transmitting the acknowledge frame to the first device, when the link quality information is included in the data frame.
摘要:
The present invention provides an apparatus for manufacturing a truss structure using multi-point pins, a method of manufacturing a truss structure using the apparatus, a truss core sandwich panel having the truss structure, and a method of manufacturing the truss core sandwich panel. The apparatus includes a metal plate, clamps, an upper die and a lower die. The clamps hold the metal plate. The upper die has upper multi-point pins which press the metal plate downwards. The lower die has lower multi-point pins which press the metal plate upwards. The metal plate has first and second points that respectively correspond to the upper and lower multi-point pins. The first points are extended downwards by the upper multi-point pins, and the second points are extended upwards by the lower multi-point pins. Thereby, many symmetrical sides are formed in the truss structure, thus increasing the stability of the truss structure.
摘要:
A refrigerator includes a separate cool air supply channel formed in an ice making chamber door so as to supply cool air to a crushing chamber formed in the ice making chamber door, which is connected to the front portion of an ice bank storing ice dropped from an ice making tray, to open and close an ice making chamber, thereby preventing ice remaining in the crushing chamber from melting.
摘要:
The present invention relates to a road guide apparatus for a visually impaired person, which not only senses the yellow color of Braille blocks installed on a road to guide the visually impaired person, but also reads information from an RFID tag to guide the visually impaired person. The road guide apparatus for a visually impaired person comprises a road sensing apparatus 10 including a handle, wheels attached to a main body 30 of the apparatus 10, a handle rod 20 fixed at the main body 30 via hinge 22, and a control unit 50 installed within the main body 30 and connected to a yellow color sensing unit 40 and a tag sensing unit 60. The yellow color sensing unit 40 senses the yellow color of a Braille block 2 or a yellow line and transmits a signal to the control unit 50. The tag sensing unit 60 senses a signal of the RFID tag installed on the road and transmits the signal to the control unit 50. The control unit 50 has a central processing unit 51 for processing signals, and an audio signal output unit 56 for transmitting information to a Bluetooth module 80 or an earphone 82 so as to be recognized by the visually impaired person.