Door operating apparatus, electromagnetic clutch, and coupling mechanism

A vehicle backdoor operating apparatus, comprising:

• a motor bracket that covers a driving shaft of a driving motor, and holds the driving motor to a supporting bracket;
• an output shaft that is disposed from the motor bracket toward the supporting bracket so as to be orthogonal to an extending direction of the driving shaft;
• a first rotational element that is linked with the driving shaft of the driving motor, and disposed on the output shaft and disposed within the motor bracket;
• a second rotational element disposed between the first rotational element and the supporting bracket on the output shaft;
• a clutch unit including a clutch driving section that supports a rotation of the output shaft, wherein the clutch driving section is mounted to and held by the supporting bracket, wherein
• when the first rotational element and the second rotational element are engaged by driving of the clutch driving section, a swing arm is actuated by the driving force of the driving motor,
• a coupling mechanism comprising:
• a first member including a head portion in a spherical shape,
• a second member including a recessed portion that fits with the head portion, and
• a spacer that is provided between the first member and the second member, and generates an elastic force so that the first member and the second member are separated from each other,
• wherein the coupling mechanism rotatably connects one end of the swing arm to one end of a rod which is connected to a backdoor of a vehicle, so that actuation of the swing arm by the driving motor causes the rod to open or close the backdoor of the vehicle via the coupling mechanism.