| 主权项 |
1. A press-type liquid pump for fitting to a container to pump a liquid product within the container to an exterior of the container, the liquid pump defining a longitudinal axis and comprising:
a fixed unit fixed relative to the container, the fixed unit including a toothed sleeve for fixing the liquid pump to the container and a cylinder which is located below and fixedly connected to the toothed sleeve; and a movable unit capable of performing a reciprocating motion relative to the fixed unit, the liquid product being pumped to the exterior of the container by means of the reciprocating motion, the reciprocating motion being achieved by a pressing force applied by a user to the movable unit to move the movable unit relative to the fixed unit along the longitudinal axis of the liquid pump in combination with an elastic force of an elastic restoring means for restoring the movable unit relative to the fixed unit along the longitudinal axis after the pressing force is removed, the movable unit comprising a pressing head which is positioned above the toothed sleeve for the user to press and a piston rod which is positioned below and fixedly connected to the pressing head, the elastic restoring means being a plastic elastic compressing means which is located below the toothed sleeve and installed between the piston rod and the cylinder, the plastic elastic compressing means comprising at least one elastic strip generally formed in an arc shape, an upper end of the elastic strip acting on the piston rod and a lower end of the elastic strip acting on the cylinder, such that a movement of the piston rod relative to the cylinder along the longitudinal axis causes the elastic strip to be elastically compressed, and the line of action of a resultant force of elastic forces generated by the elastic strip is always coincident with the longitudinal axis. |
