| 摘要 |
PURPOSE: A reinforcing jack is provided to reduce costs by only replacing a damaged component, and to simply assemble the reinforcing jack by using minimum components. CONSTITUTION: A reinforcing jack(100) comprises a housing(110), a length control shaft(120), a separation prevention unit(140), and a length control unit(150). The housing has a space and an opening(114) communicated with the space. The length control shaft is accepted in the space of the housing, and is drawn in/out through the opening. The separation prevention unit prevent the length control shaft from being separated to outside. The length control unit is formed in the outer surface of the length control shaft, and controls the length of the drawn length control shaft.
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