Card reader and control method thereof
A card reader which reads information recorded on a card may include a plurality of units having overlapping operation periods; and a control unit structured to operate each of the plurality of units by a plurality of drive powers. The control unit may be configured to control the plurality of units so that periods in which the drive powers of each of the plurality of units are maximum do not overlap.
1. A card reader which reads information recorded on a card, the card reader comprising:
a plurality of units having overlapping operation periods; and
a control unit structured to operate each of the plurality of units by a plurality of drive powers, wherein
the control unit is configured to control the plurality of units so that periods in which the drive powers of each of the plurality of units are maximum do not overlap.
2. The card reader according to claim 1 , wherein
the plurality of units are operated when an insertion of the card is detected.
3. The card reader according to claim 2 , wherein
the plurality of units comprise at least two of: a shutter driving mechanism structured to drive a shutter member structured to close a conveyance path of the card, a motor structured to drive a conveyance roller structured to convey the card, and an interference magnetic field generation device structured to generate an interference magnetic field.
4. The card reader according to claim 3 , wherein
the plurality of units comprise the shutter driving mechanism and the motor, and
the control unit is configured such that, when the insertion of the card is detected, the control unit operates the shutter drive mechanism at a maximum drive power and then operates the shutter drive mechanism at a drive power which is lower than the maximum drive power, and accelerates the motor to a target speed at a first drive power during a period in which the shutter driving mechanism is operated at the drive power which is lower than the maximum drive power, and then rotates the motor at a constant speed at a drive power lower than the first drive power.
5. The card reader according to claim 4 , wherein
the plurality of units further comprise the interference magnetic field generation device, and
the control unit is configured to operate the interference magnetic field generation device at a second drive power during each of the first period in which the shutter driving mechanism is operated at the maximum drive power and the second period in which the motor is operated at the first drive power, and operate the interference magnetic field generation device at a third drive power which is greater than the second drive power during a period other than the first period and the second period.
6. The card reader according to claim 5 , wherein
the control unit is configured to operate the interference magnetic field generation device at the second drive power when the rotational speed of the motor becomes a threshold or less during a period in which the motor is operated at a drive power lower than the first drive power.
7. The card reader according to claim 1 , wherein
the plurality of units comprise at least two of: a shutter driving mechanism structured to drive a shutter member structured to close a conveyance path of the card, a motor structured to drive a conveyance roller structured to convey the card, and an interference magnetic field generation device structured to generate an interference magnetic field.
8. The card reader according to claim 7 , wherein
the plurality of units comprise the shutter driving mechanism and the motor, and
the control unit is configured such that, when the insertion of the card is detected, the control unit operates the shutter drive mechanism at a maximum drive power and then operates the shutter drive mechanism at a drive power which is lower than the maximum drive power, and accelerates the motor to a target speed at a first drive power during a period in which the shutter driving mechanism is operated at the drive power which is lower than the maximum drive power, and then rotates the motor at a constant speed at a drive power lower than the first drive power.
9. The card reader according to claim 8 , wherein
the plurality of units further comprise the interference magnetic field generation device, and
the control unit is configured to operate the interference magnetic field generation device at a second drive power during each of the first period in which the shutter driving mechanism is operated at the maximum drive power and the second period in which the motor is operated at the first drive power, and operate the interference magnetic field generation device at a third drive power which is greater than the second drive power during a period other than the first period and the second period.
10. The card reader according to claim 9 , wherein
the control unit is configured to operate the interference magnetic field generation device at the second drive power when the rotational speed of the motor becomes a threshold or less during a period in which the motor is operated at a drive power lower than the first drive power.
11. A control method of a card reader which reads information recorded on a card, the control method comprising:
a control step comprising operating, at a plurality of drive powers, each of a plurality of units mounted on the card reader and having overlapping operation periods, wherein
the control step controls the plurality of units so that the periods in which the drive powers of the plurality of units are maximum do not overlap.