Liquid ejection head, recording device, and method manufacturing liquid ejection head

A liquid ejection head comprising:

• a channel member formed from a a plurality of vertically stacked plates that include a first plate a second plate;
• a common channel formed from holes in the plurality of vertically stacked plates, wherein the second plate is bonded by an adhesive to a top surface of the first plate and configures an upper surface of the common channel;
• a plurality of ejection units connected to the common channel, wherein each of the plurality of ejection units includes:
• an ejection hole,
• a pressurizing chamber connected to the ejection hole, and
• an individual channel connected to the pressurizing chamber and to the common channel;
• and
• a plurality of pressurizing parts individually pressurizing the plurality of pressurizing chambers,
• wherein the first plate includes:
• a common channel-use groove configuring the common channel,
• a plurality of individual channel-use grooves which are communicated with the common channel-use groove from one wall surface between wall surfaces on two sides of the common channel-use groove and individually configure respective individual channels, and
• at least one dummy channel-use groove that configures a dummy channel which is not connected to the plurality of ejection units:
• wherein the one wall surface of the common channel-use groove includes:
• a connection region in which the plurality of individual channel-use grooves are connected, and
• a non-connection region which is adjacent to the connection region, in which the plurality of individual channel-use grooves are not connected, and which is longer than a distance between each two adjacent connection positions among connection positions of the plurality of individual channel-use grooves with respect to the one wall surface in the connection region, wherein the at least one dummy channel-use groove communicates with the common channel-use groove from the one wall surface in the non-connection region.

A liquid ejection head comprising:

• a first plate that includes:
• a common channel-use groove, comprising first and second side surfaces facing to each other, and
• a plurality of individual channel-use grooves which are communicated with the common channel-use groove and connected to the first side surface;
• a channel member formed from the first plate, a second plate and an adhesive that is sandwiched by the first and second plate in a vertical direction, wherein the adhesive bonds a top surface of the first plate to the second plate;
• and
• a pressurizing part disposed on the channel member;
• wherein the first side surface includes:
• a connection region in which the plurality of individual channel-use grooves are connected to the common channel-use groove;
• and a
• non-connection region which is next to the connection region, in which the plurality of individual channel-use grooves are not connected to the common channel-use groove, wherein at least one adhesive stopper is disposed on the first side surface in the non-connection region.