Pressure damper, liquid jet head, liquid jet recording apparatus, and method for damping pressure

摘要

A pressure damper has a main body with a recessed section for storing liquid. A thin film is mounted to the main body so as to hermetically seal the recessed section. A reference member is arranged in the recessed section of the main body and is configured to be brought into contact with or separated from the thin film. A detecting unit is configured to detect, without contacting the reference member, a displacement of the reference member due to a pressure change of the liquid stored in the recessed portion of the main body.

主权项

1. A pressure damper comprising:
a main body having a concave portion for storing liquid and having conduits opening to the concave portion; a cover mounted to the main body for covering at least the concave portion; a thin film fixedly mounted to the main body at a peripheral section of the concave portion and arranged so as to hermetically seal the concave portion; a reference member disposed in the concave portion and configured to be brought into contact with or separated from the thin film; and displacement amount detecting means for detecting, without contacting the reference member, a displacement of the reference member due to a pressure change of the liquid stored in the concave portion; wherein the displacement amount detecting means comprises a displacement amount sensor fixedly mounted on a surface of the cover on the concave portion side so as to be opposed to the reference member.