This invention provides for a print roll cartridge for a camera system. To this end, the vibration sensor is characterized in thatthe knock sensor comprises at least one spring washer that is or can be tensioned relative to the internal combustion engine, anda piezoresistive amorphous carbon layer is applied onto at least one face of the at least one spring washer. Particularly, the use of dicyclopentadiene can give a hydrogenated product of ring-opened cyclic olefin polymer excellent in heat resistance, and this product can be advantageously used as parts or formed products for medical appliances or electrical components. The first pass through partition is configured to maintain a light-tight configuration as the first passage is placed in selective communication with the interior and exterior volumes of the enclosure. In the other way, two of the magnetic poles can be equipped with only one power amplifier, and the other magnetic pole is equipped with an individual power amplifier so as to reduce the number of the power amplifiers.