Liquid detecting piezoelectric device, liquid container and mounting module member

A liquid container comprising:

• a housing containing therein liquid;
• a liquid supply opening formed in said housing;
• a liquid detection device attached on said housing, said liquid detection device comprising:
• a vibrating section symmetrical about a center thereof;
• at least one electrode electrically connecting with said vibrating section;
• a piezoelectric element;
• an upper electrode disposed on an upper surface of said piezoelectric element;
• a lower electrode disposed on a lower surface of said piezoelectric element;
• and
• a vibrating plate having a upper surface contacting said lower electrode and a lower surface a part of which contacting the liquid contained in the liquid container,
• wherein at least a part of said piezoelectric element, said upper electrode, said lower electrode and said vibrating plate constitute said vibrating section.

A module for detecting a liquid consumption status of a liquid contained in a liquid container, comprising:

• a liquid detection device attached on said housing, said liquid detection device comprising:
• a vibrating section symmetrical about a center thereof;
• and
• at least one electrode electrically connecting with said vibrating section;
• a mounting structure formed integrally with said liquid detection device for mounting said liquid detection device onto the liquid container;
• a piezoelectric element;
• an upper electrode disposed on an upper surface of said piezoelectric element;
• a lower electrode disposed on a lower surface of said piezoelectric element;
• and
• a vibrating plate having a upper surface contacting said lower electrode and a lower surface a part of which contacting the liquid contained in the liquid container,
• wherein at least a part of said piezoelectric element, said upper electrode, said lower electrode and said vibrating plate constitute said vibrating section.

A liquid detection device attached on a liquid container for detecting a liquid consumption status of the liquid contained in the liquid container, the liquid detection device comprising:

• a vibrating section comprising a piezoelectric element;
• at least one electrode electrically connecting with said vibrating section;
• and
• a base member on which said vibrating section and said electrode are disposed, said base member comprising a cavity formed at a position facing said vibrating section, said cavity contacting the liquid contained in said liquid container,
• wherein the depth of said cavity is smaller than the narrowest width of said cavity.

A liquid container comprising:

• a housing containing therein liquid;
• a liquid supply opening formed in said housing;
• a liquid detection device attached on said housing, said liquid detection device comprising:
• a vibrating section comprising a piezoelectric element;
• and
• at least one electrode electrically connecting with said vibrating section, and
• a cavity formed in a wall of said housing at a position facing said vibrating section, said cavity contacting the liquid contained in said liquid container,
• wherein the depth of said cavity is smaller than the narrowest width of said cavity.

A module for detecting a liquid consumption status of a liquid contained in a liquid container, comprising:

• a liquid detection device attached on said housing, said liquid detection device comprising:
• a vibrating section comprising a piezoelectric element;
• and
• at least one electrode electrically connecting with said vibrating section,
• a mounting structure formed integrally with said liquid detection device for mounting said liquid detection device onto the liquid container;
• and
• a cavity formed in said mounting structure at a position facing said vibrating section, said cavity contacting the liquid contained in said liquid container.