JP2006170638A5 - - Google Patents

Claims (7)

A cavity having a first surface and a second surface facing each other and receiving a medium to be detected is formed so as to open to the first surface side, and a bottom surface of the cavity is formed so as to be able to vibrate. A vibration cavity forming base,
Detection comprising: a first electrode formed on the second surface side of the vibration cavity forming base; a piezoelectric layer laminated on the first electrode; and a piezoelectric element having a second electrode laminated on the piezoelectric layer Equipment,
The detection target is mounted, and an attachment target member having an upstream space communicating with the cavity via an upstream flow path, and a downstream space communicating with the cavity via a downstream flow path,
An elastic seal member that is interposed between the detection device and the attachment target member and seals between the detection device and the attachment target member;
The mounting structure for a liquid detection device, wherein the elastic seal member is disposed at a place other than a flow path wall of a flow path space where the cavity, the upstream flow path, and the downstream flow path communicate with each other.   The attachment target member is formed with a channel protrusion projecting from the upstream channel and the downstream channel, and the elastic seal member includes a detection device and an attachment object member at an outer periphery of the channel protrusion. The mounting structure of the liquid detection device according to claim 1, wherein the gap is sealed.   The mounting structure of the liquid detection device according to claim 2, wherein an annular ridge surrounding the opening of the upstream flow channel and the downstream flow channel is formed on a surface of the flow channel protrusion facing the detection device.   The upstream channel and the downstream channel each have a channel area narrowed with respect to the cavity, and are set to have a length so that a fluidic mass of the liquid exists inside. A mounting structure of the liquid detection device according to claim 1.   The liquid detection device according to any one of claims 1 to 4, further comprising a biasing member that fixes the detection device to the attachment target member by biasing the detection device toward the attachment target member. Mounting structure.   The attachment target member has a supply-side buffer chamber that communicates with the cavity via an upstream flow path as an upstream space, and a discharge-side buffer chamber that communicates with the cavity via a downstream flow path as a downstream space. It is a buffer member, The attachment structure of the liquid detection apparatus as described in any one of Claims 1-5. A container body having a liquid delivery port for delivering the liquid stored inside to the outside;
A detection device attached to the container body for detecting the liquid inside,
The detection device has a first surface and a second surface facing each other, and a cavity for receiving a medium to be detected is formed so as to open toward the first surface, and the bottom surface of the cavity vibrates. A vibration cavity forming base formed in a possible manner;
Detection comprising: a first electrode formed on the second surface side of the vibration cavity forming base, a piezoelectric layer laminated on the first electrode, and a piezoelectric element having a second electrode laminated on the piezoelectric layer And comprising the device,
The container body has an upstream space communicating with the cavity via an upstream flow path, and a downstream space communicating with the cavity via a downstream flow path,
An elastic seal member that is interposed between the detection device and the container body and seals between the detection device and the container body;
The liquid container, wherein the elastic seal member is disposed at a place other than a flow path wall of a flow path space where the cavity, the upstream flow path, and the downstream flow path communicate with each other.