| 摘要 |
<p>PCT No. PCT/SE89/00733 Sec. 371 Date Jul. 11, 1991 Sec. 102(e) Date Jul. 11, 1991 PCT Filed Dec. 15, 1989 PCT Pub. No. WO90/07183 PCT Pub. Date Jun. 28, 1990.Safety device for a cassette for a compact disc, a cassette tape or the like, which comprises two hingedly interconnected rectangular cassette halves. The safety device can be mounted on the outside of the cassette encircling the cassette to prevent opening thereof and is provided with a lock member for locking engagement with the cassette, which includes a rotary bolt (22) enclosed in a lock housing (20), to be adjusted between engaged position and disengaged position from the outside of the lock housing. A spring blade (30) of magnet material is provided as a latch member for the rotary bolt, the spring blade being arranged to prevent in a latching position rotation of the rotary bolt from the engaged position and being operable against spring bias by magnetic attraction from the outside of the lock housing from the engaged position unlatching the rotary bolt to allow rotation thereof to the disengaged position.</p> |
