| 摘要 |
A support rail for a boxspring includes a cross bar having opposed ends, and a bracket attached to each end. Each bracket has a gripper arm and is mounted to move laterally across the end to which it is attached between an extended position and a retracted position. An end section of each of end of the cross bar and a connection section of each of the brackets is made of a malleable material, from which a lock mechanism is formed to releasably interlocked together the cross bar and brackets when the brackets are in the retracted position. The lock mechanism includes a locking element and a receptacle, with the receptacle formed in either the bracket or the cross bar and the locking element formed in either bracket or the cross bar depending on the position of the receptacle. The locking element has a predetermined configuration with a sloping portion that facilitates moving the bracket in one direction from the extended position to the retracted position and a stop portion that engages the receptacle and inhibits moving the bracket in the reverse direction from the retracted position to the extended position.
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