| 摘要 |
A tubular housing is attached to a first line member. It includes a key hole opening in its side wall through which a head member on a second line member can be inserted and moved into said housing as the second line member is moved into a slot formed in an end wall of the housing. An elongated coil spring is housed within the housing. It is retractable to open the key hole opening and when at rest its convolutions encircle said head member and block inadvertent removal of said head member out of said housing and said first line member out from said slot. |
