| 摘要 |
PURPOSE:To allow an easy and sure operation and to avert an accident such as disengagement by inserting the front end of light shielding paper into slit ports for detaining the light shielding paper of a spool and rotating the spool to take up a film with the light shielding paper as load. CONSTITUTION:A cylindrical shaft part 112 on which the light shielding paper is wound is disposed on the inner side of flanges 101 on both sides and a minor diameter shaft part 113 which is smaller in diameter than the cylindrical shaft part and is concentrical is provided to the inner side thereof. The minor diameter shaft part is constituted of 4 pieces of nearly symmetrical beams 114 and the insertion ports for the front end of the light shielding paper, i.e. slit ports are formed to the spacing 115, 116 between the beams. The respective beams 114 are formed of a fine and elastic material and are so formed as to be easily torsioned by small load and to restore the original state when the load is removed. The front end of the light shielding paper is inserted into the slit ports 115, 116 for detaining the light shielding paper of the spool and the spool rotates to take up the film with the light shielding paper as the load. The initial detaining function of the light shielding paper is intensified in this way and the easy, sure and safe loading of the spool to the camera is possible. |
