Patent ID: 7922308
Filing Date: 2011-04-12
Classification: B41J

Abstract:
1. A liquid detection device comprising: a casing main body, a passage being formed in the casing main body and exposed in an opening; a sensor base that faces the passage in the opening formed in the casing main body; a sensor chip that includes a piezoelectric element, the sensor chip being provided on the sensor base on a side that is opposite to a side that faces the passage; a film that holds the sensor base in the opening and seals the opening; and a partition wall that divides the passage into an upstream side and an downstream side inside the casing main body, the sensor chip having a sensor cavity that receives a liquid that is a detection target; the sensor base having a first hole that guides the liquid from the upstream side of the passage to the sensor cavity, and a second hole that guides the liquid from the sensor cavity to the downstream side of the passage; and the sensor base being configured to come into contact with the casing main body through only the partition wall at a position between the first hole and the second hole in a depth direction of the opening.