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A safety driving equipment for a scooter, includes a twister member with a supporting arm at the end thereof opposite to the driving wheels. A universal safety wheel is mounted at the free end of the supporting arm and a transmission unit is extended to connect the twister member at a position betwe

A safety driving equipment for a scooter, includes a twister member with a supporting arm at the end thereof opposite to the driving wheels. A universal safety wheel is mounted at the free end of the supporting arm and a transmission unit is extended to connect the twister member at a position between the safety wheel and the driving wheels. The safety wheel is capable of efficiently providing an increased safety area while the scooter in wobbling mainly to maintain the force center shifting within the safety area.

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A safety driving equipment for a scooter, includes a twister member with a supporting arm at the end thereof opposite to the driving wheels. A universal safety wheel is mounted at the free end of the supporting arm and a transmission unit is extended to connect the twister member at a position betwe

A safety driving equipment for a scooter, includes a twister member with a supporting arm at the end thereof opposite to the driving wheels. A universal safety wheel is mounted at the free end of the supporting arm and a transmission unit is extended to connect the twister member at a position between the safety wheel and the driving wheels. The safety wheel is capable of efficiently providing an increased safety area while the scooter in wobbling mainly to maintain the force center shifting within the safety area. eceiving qualities, the request message including the measured receiving qualities; a message retransmission unit configured to detect an acknowledgement response to the transmitted request message and retransmit the request message until detecting the acknowledgement response within a predetermined time; and a receiving quality update unit configured to update the measured qualities included in a request message to be transmitted to latest values at the time the message retransmission unit retransmits the request message. 2. A mobile communication terminal apparatus measuring receiving qualities of radio signals transmitted by a synchronized base station and at least one other base station, and transmitting a request message for hand-over procedure to the synchronized base station, said apparatus comprising: a message transmission unit configured to transmit a request message for handover based on the measured receiving qualities, the request message including the measured receiving qualities; a message retransmission unit configured to detect an acknowledgement response to the transmitted request message and retransmit the request message until detecting the acknowledgement response within a predetermined time; and a receiving quality update unit configured to re-measure the receiving qualities of the radio signals transmitted by said synchronized base station and said at least one of other base stations, after it is detected that there is no response of acknowledgement from said base station, and update the measured qualities included in a request message to be transmitted to latest values on a basis of a result of the re-measurement. 3. A mobile communication terminal apparatus measuring receiving qualities of radio signals transmitted by a synchronized base station and at least one other base station, and transmitting a request message for hand-over procedure to the synchronized base station, said apparatus comprising: a message transmission unit configured to transmit a request message for handover based on the measured receiving qualities, the request message including the measured receiving qualities; a message retransmission unit configured to detect an acknowledgement response to the transmitted request message and retransmit the request message until detecting the acknowledgement response within a predetermined time; and a receiving quality update unit configured to re-measure the receiving qualities of the radio signals transmitted by said synchronized base station and said at least one of other base stations, simultaneously with an operation of monitoring the acknowledgement response from said base station, and update the measured qualities included in a request message to be transmitted to latest values on a basis of a result of the re-measurement. 4. A CDMA mobile communication terminal apparatus receiving signals transmitted by a synchronized base station and at least one other base station, demodulating the received signals, detecting degradation of receiving qualities of the demodulated signals and transmitting a request message for hand-over procedure to the synchronized base station, said apparatus comprising: a message transmission unit configured to transmit a request message for handover based on the measured receiving qualities, the request message including the measured receiving qualities; a message retransmission unit configured to detect an acknowledgement response to the transmitted request message and retransmit the request message until detecting the acknowledgement response within a predetermined time; and a receiving quality update unit configured to update the measured qualities included in a request message to be transmitted to latest values at the time the message retransmission unit retransmits the request message. 5. A CDMA mobile communication terminal apparatus receiving signals transmitted by a synchronized base station and at least one other base station, demod ulating the received signals, detecting degradation of receiving qualities of the demodulated signals and transmitting a request message for hand-over procedure to the synchronized base station, said apparatus comprising: a message transmission unit configured to transmit a request message for handover based on the measured receiving qualities, the request message including the measured receiving qualities; a message retransmission unit configured to detect an acknowledgement response to the transmitted request message and retransmit the request message until detecting the acknowledgement response within a predetermined time; and a receiving quality update unit configured to re-measure the receiving qualities of the radio signals transmitted by said synchronized base station and said at least one of other base stations, after it is detected that there is no response of acknowledgement from said base station, and update the measured qualities included in a request message to be transmitted to latest values on a basis of a result of the re-measurement. 6. A CDMA mobile communication terminal apparatus receiving signals transmitted by a synchronized base station and at least one other base station, demodulating the received signals, detecting degradation of receiving qualities of the demodulated signals and transmitting a request message for hand-over procedure to the synchronized base station, said apparatus comprising: a message transmission unit configured to transmit a request message for handover based on the measured receiving qualities, the request message including the measured receiving qualities; a message retransmission unit configured to detect an acknowledgement response to the transmitted request message and retransmit the request message until detecting the acknowledgement response within a predetermined time; and a receiving quality update unit configured to re-measure the receiving qualities of the radio signals transmitted by said synchronized base station and said at least one of other base stations, simultaneously with an operation of monitoring the acknowledgement response from said base station, and update the measured qualities included in a request message to be transmitted to latest values on a basis of a result of the re-measurement. 7. A control device used in a mobile communication terminal apparatus measuring receiving qualities of radio signals transmitted by a synchronized base station and at least one other base station, and transmitting a request message for hand-over procedure to the synchronized base station, said apparatus comprising: an instruction unit configured to transmit a request message for handover based on the measured receiving qualities, the request message including the measured receiving qualities; a re-instruction unit configured to detect an acknowledgement response to the transmitted request message and retransmit the request message until detecting the acknowledgement response within a predetermined time; and a receiving quality update unit configured to update the measured qualities in a request message to be transmitted to latest values at the time the re-instruction unit retransmits the request message. 8. A control device used in a mobile communication terminal apparatus measuring receiving qualities of radio signals transmitted by a synchronized base station and at least one other base station, and transmitting a request message for hand-over procedure to the synchronized base station, said apparatus comprising: an instruction unit configured to transmit a request message for handover based on the measured receiving qualities, the request message including the measured receiving qualities; a re-instruction unit configured to detect an acknowledgement response to the transmitted request message and retransmit the request message until detecting the acknowledgement response within a predetermined time; and a receiving quality update unit configured