| 摘要 |
A tube expander including: a main body, two opposite clamping blocks being disposed under a bottom of the main body, the two clamping blocks defining therebetween an insertion space in which a copper tube can be clamped; and a bolt screwed through the main body. One end of the bolt, which extends out of the main body, has a rotary switch. A top face of the rotary switch is formed with a polygonal socket in which a connecting member is accommodated. The connecting member is easily connectable with a mechanical power source for conveniently and quickly ascend/descending the bolt within the insertion space of the main body.
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