Device for preventing human body from being jammed using change in capacitance

A device for preventing a human body from being jammed, the device comprising:

• a sensor configured to detect a change in capacitance corresponding to a gap between an external conductor and an internal conductor which are electrically grounded to a driven object;
• a signal processor configured to compare a detection signal of the sensor with a reference value and output a jamming occurrence signal indicating jamming occurrence of the human body in the driven object;
• a motor configured to move the driven object;
• and
• a controller configured to control the motor to stop movement of the driven object or move the driven object in a direction opposite to the movement when the jamming occurrence signal is received from the signal processor,
• wherein:
• the sensor is formed such that the external conductor, the internal conductor, and a support are integrated;
• and
• the support is coupled between the external conductor and the internal conductor and prevents the external conductor from being in direct contact with the internal conductor to electrically insulate the external conductor from the internal conductor,
• wherein:
• protruding pillars are vertically formed on both sides of the support in a lengthwise direction;
• a recessed seating groove is formed between the protruding pillars facing each other;
• and
• a bottom surface of the internal conductor is in contact with the seating groove, and
• wherein:
• a pair of first slits extending in the lengthwise direction are formed in outer sides of the protruding pillars on both sides of the support;
• and
• a pair of fitting protrusions extending in the lengthwise direction are formed on respective inner sides of the protruding pillars on both sides of the support.