| 摘要 |
A positioning assembly includes a first connecting rod with a threaded end section, a second connecting rod with a threaded end section, an adjusting member having two opposite threaded ends that threadedly engage the threaded end sections of the first and second connecting rods and an intermediate section extending between the threaded ends, and a restricting member mounted on one of the first and second connecting rods and releasably engageable with the intermediate section when said one of the first and second connecting rods rotates relative to the adjusting member in a loosening direction, thereby preventing further rotation of said one of the first and second connecting rods relative to the adjusting member.
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