1. Folding box, comprising:
a base,
first and second side walls which, together with the base, form a box open at the top in the folded open state,
at least one retaining element disposed on a first side wall,
at least one pin mounted so as to be rotatable on a second side wall,
wherein the at least one pin has a cross-section that is not circular on at least one pin end and the at least one pin end locks the first to the second side wall via the retaining element in a first rotational position and unlocks said side walls in a second rotational position, and
wherein the at least one pin can be automatically rotated into the second rotational position as the second side wall is folded open.
2. Folding box according to claim 1, wherein the at least one pin end has a cross-section selected from the group comprising rectangular with rounded corners, S-shaped, oval, ellipsoid, hook-shaped or a flattened circular cross-section.
3. Folding box according to claim 1, wherein the at least one pin can be automatically rotated into the first rotational position with the aid of a spring.
4. Folding box according to claim 3, wherein the at least one pin can be automatically rotated into the first rotational position with the aid of the spring once the second side wall has assumed an end position.
5. Folding box according to claim 1, wherein the at least one pin can be rotated into the first andor second rotational position via a handle.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A motor driving device, which drives a motor, comprising:
an output circuit that is driven by a first power supply voltage, includes a switching element of which turning-onoff is switched according to a switching control signal, and outputs current corresponding to the pulse width of the voltage to motor coils when receiving a pulse-width-modulated first power supply voltage;
a control circuit that is driven by a second power supply voltage and includes a position detecting circuit and a switching circuit, the position detecting circuit detecting the position of a rotor of the motor, and the switching circuit generating a switching control signal on the basis of the detection result of the position detecting circuit in order to switch the turning-onoff of the switching element;
a backflow preventing diode; and
a capacitor performing a charging operation by a voltage that is applied from an input terminal of the first power supply voltage through the diode, the capacitor applying a voltage of a node between the diode and the capacitor to the control circuit as the second power supply voltage.
2. The motor driving device according to claim 1, wherein the position detecting circuit includes
a Hall element that detects the direction of a magnetic field generated by the rotor,
a Hall amplifier that amplifies the waveform of an output of the Hall element and sends the output to the switching circuit, and
an output terminal through which the waveform of the output of the Hall amplifier is output to an external control device as a position detection signal.
3. The motor driving device according to claim 1, wherein the position detecting circuit detects the position of the rotor by detecting counter electromotive forces that are generated in the motor coils during the rotation of the rotor.
4. The motor driving device according to claim 3,
wherein the output circuit supplies current to the motor coils that correspond to a plurality of phases,
the position detecting circuit detects a position corresponding to a zero level of a voltage generated in each of the coils of the motor on the basis of the counter electromotive force that is generated in each of the motor coils corresponding to the phases, and
the switching circuit generates a conduction timing of each of the motor coils corresponding to the phases on the basis of the detection result of the position corresponding to the zero level, and outputs the switching control signal corresponding to the conduction timing.
5. The motor driving device according to claim 1, further comprising:
a voltage output circuit including a switching circuit that generates the pulse-width-modulated first power supply voltage by performing a turning-onoff operation according to a PWM signal input from the outside.
6. A motor unit comprising:
a motor; and
a motor driving device that drives the motor and is integrated with the motor,
wherein the motor driving device includes
an output circuit that is driven by a first power supply voltage, includes a switching element of which turning-onoff is switched according to a switching control signal, and outputs current corresponding to the pulse width of a pulse-width-modulated first power supply voltage to motor coils when receiving the voltage;
a control circuit driven by a second power supply voltage, and including a position detecting circuit that detects the position of a rotor of the motor and a switching circuit that generates a switching control signal on the basis of the detection result of the position detecting circuit in order to switch the turning-onoff of the switching element;
a backflow preventing diode; and
a capacitor performing a charging operation by a voltage that is applied from an input terminal of the first power supply voltage through the diode, and applying a voltage of a node between the diode and the capacitor to the control circuit as the second power supply voltage.
7. The motor unit according to claim 6, further comprising:
a fan that is driven by the motor and is integrated.
8. The motor unit according to claim 6,
wherein the motor is a brushless motor.
9. The motor unit according to claim 6, further comprising:
a voltage output circuit including a switching circuit that generates the pulse-width-modulated first power supply voltage by performing a turning-onoff operation according to a PWM signal input from the outside.