| 摘要 |
The present invention is directed to a cutter having a disposable blade cartridge, a grip for handling by a user, and a coupling arrangement for coupling the cartridge to the grip in such a manner to prevent undesired rotation of the cartridge with respect to the grip. The blade cartridge includes a blade, an upper cover, and a lower cover, the blade being rotatably supported therebetween. The upper cover is further provided with a locking protrusion at one end and a locking recess. The locking protrusion is inserted into a locking aperture that is carried by the grip, thereby acting against a spring-biased pusher within the aperture. The grip further carries a spring-biased locking member that mates with the locking recess of the upper cover. To attach the blade cartridge to the grip, the locking protrusion is inserted into the locking aperture, against the spring-biased pusher. The cartridge is then rotated 90° clockwise, thereby locking the protrusion in the aperture. This rotation also causes the locking member to move into engagement with the locking recess. To release the blade cartridge from the grip, a release knob that is operatively coupled to the locking member is actuated, thereby moving the member out of engagement with the recess. The blade cartridge can then be rotated 90° counterclockwise. In this position, the spring-biased pusher acts against the locking protrusion, thereby detaching the cartridge from the grip. Once the cartridge is detached, a new cartridge can be placed on the grip and the old cartridge disposed.
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