Portable optical information reading apparatus

摘要

An optical information reading apparatus of a portable type includes a reading device for reading optical information and converting the optical information into electric information. A volatile memory device operates for storing the electric information generated by the reading device. A first power supply operates for feeding electric power to at least the reading device and a volatile memory device. A changing device operates for replacing the first power supply by a second power supply and enabling the second power supply to feed electric power to at least the volatile memory device instead of the first power supply in cases where electric power feed by the first power supply is required to be cut off. A writing device operates for transferring the electric information from the volatile memory device to the nonvolatile memory device, and writing the electric information into the nonvolatile memory device when a predetermined time has elapsed since a moment at which the electric power feed by the first power supply is required to be cut off. The changing device replaces the second power supply by the first power supply and enables the first power supply to feed electric power to at least the volatile memory device instead of the second power supply before the writing device transfers the electric information from the volatile memory device to the nonvolatile memory device and writes the electric information into the nonvolatile memory device. The first power supply feeds electric power to the writing device and the nonvolatile memory device.