| 摘要 |
A support frame mounts to a surface and for receives a support tube having a locking button. The support frame includes a cap for affixing the support frame to the surface. A sleeve is attached to the cap for receiving the support tube and for engaging the locking button. A filler sleeve is disposed in the sleeve for abutting an end of the support tube. A spring is disposed in the sleeve for biasing the filler sleeve against the support tube. The filler sleeve has a stop for limiting the travel of the filler sleeve and for retaining the filler sleeve in the sleeve.
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