| 摘要 |
A switch mechanism (40) suitable for use in a waterproof torch (10) has a permanent magnet (54) mounted inside a slidable operating member (48) which is secured to the outside of a casing (12). Inside the casing (12) a first contact member (30) is fixed and a second contact member (38) is mounted so as to be resiliently biased towards or away from the first contact member (30). The second contact member carries a further permanent magnet (58) which is arranged so that like or unlike poles of the magnets face one another when the operating member is in a first position. The repulsive force between the magnets forces the contact members out of or into contact. When the operating member slides to a second position the force between the magnets (54, 58) is not sufficient to overcome the resilient bias and the contact members close or separate. The first contact member (30) is supported on a partition (66) and the torch batteries are located by internal casing ribs. <IMAGE> |
