| 摘要 |
The invention relates to a dispenser (1) for the measured dispensing of liquid or pasty media from a container (2), comprising a pump piece (3) which can be secured to the container and which has a valve-controlled pump chamber (15) in which a piston (6) provided with a passage duct can be displaced in order to convey, and further comprising a tensioning and pulling system (17) which has a tensioning slide (20) that can be actuated by a pusher (18), acts on the piston, is supported on a pressure spring (21) and has a catch (22) which couples the tensioning slide (20) detachably to the pusher (18), the pusher having a releasing device (24) for decoupling the catch (22) when the tensioning slide (20) is under tension in order for a restoring force of the released pressure spring (21) to cause the released tensioning slide (20) to advance in conjunction with the piston (6) so as to perform a conveying stroke, the tensioning slide (20) having at least one spring element (32) on which a driver (31) is arranged in order to pull the piston (6) during advancement, the driver being controlled by the pusher (18) so as to be able to pivot from a disengagement position on the piston (6) when the tensioning slide (20) is under tension into a spring-loaded engagement position for the piston (6) when the tensioning slide (20) is released. |
