Abstract: A shock-absorbing device includes a first holding member, a second holding member movably assembled to the first holding member, and an elastic element disposed between the first and the second holding member with two ends of the elastic element pressing against the two holding members. With the elastic element, an elastic shock-absorbing space is defined between the first and the second holding member.

Abstract: A rotary locking device includes a thumbturn member, a latch member held to and turnable by the thumbturn member, and a limiting structure provided on the thumbturn member for movably connecting to or interfering with the thumbturn member. The rotary locking device can be mounted on a first object, and the thumbturn member can be turned for the latch member to turn to a position to lock a second object, so that the first and the second object are quickly and easily locked to each other. The limiting structure limits an angle by which the thumbturn member or the latch member can be turned. When the thumbturn member is turned reversely, the latch member is brought to unlock the second object, so that the first and the second object are quickly and easily separated from each other.

Abstract: A shock-absorbing device includes a first holding member, a second holding member movably assembled to the first holding member, and an elastic element disposed between the first and the second holding member with two ends of the elastic element pressing against the two holding members. With the elastic element, an elastic shock-absorbing space is defined between the first and the second holding member.