| 摘要 |
A liquid pressure-feed device having a reduced number of parts and a simple structure is provided. A snap mechanism (5) has a pivot shaft (21) supported within a closed vessel (2), a float arm (22) and a sub-arm (23) both adapted to rotate about the pivot shaft (21), a first shaft (24) supported by the float arm (22), a second shaft (25) supported by the sub-arm (23), and a spring (26) mounted between the first and second shafts (24, 25). A float (3) is connected to the float arm (22) and a change-over valve (4) is connected to the sub-arm (23) through a power transfer shaft (46). There is provided a stopper shaft (40) supported within the closed vessel (2), there is formed in the float arm (22) a window (41) through which the stopper shaft (40) extends and which restricts a rotational range of the float arm (22) with floating of the float (3), and there is formed in the sub-arm (23) a window (42) through which the stopper shaft (40) extends and which restricts a rotational range of the sub-arm (23) with descent of the float 3.
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