Liquid ejecting head unit and liquid ejecting apparatus

Abstract

A head unit includes a head, an upstream member with an upstream passage supplied with liquid, a downstream member with a downstream passage communicating with the upstream passage and supplying liquid to the head, an elastic sealer connecting the upstream and downstream passages, and including a tube with a connection passage, and a support between the sealer and the downstream member. In the head unit, the upstream member and the sealer apply pressure in a penetration direction of the connection passage and hermetically seal the upstream passage, the sealer and the downstream member apply pressure in a direction perpendicular to the penetration direction of the tube and hermetically seal the downstream passage, and the support abuts a region on a surface of the sealer, the surface being opposite the upstream member, the region overlapping a region to which the sealer and the upstream member apply pressure.

What is claimed is: 
     
         1 . A sealing member comprising:
 a tubular portion having a connection passage thereinside;   a first end surface of one end of the tubular portion, defining a first hole connecting to the connection passage; and   a second end surface of the other end of the tubular portion, defining a second hole connecting to the connection passage, wherein   the first end surface is for abutting against a first passage member to hermetically seal the first hole and a passage of the first passage member,   the second end surface is for receiving a second passage member into the second hole to hermetically seal the connection passage and a passage of the second passage member.   
     
     
         2 . The sealing member according to  claim 1 , wherein an inner surface of the connection passage is configured to come into intimate contact with an outer circumferential surface of a part of the second passage member which is provided with the passage thereinside. 
     
     
         3 . The sealing member according to  claim 1 , wherein in diameter the first hole is substantially equal to an opening of the first passage member which connects the first hole. 
     
     
         4 . The sealing member according to  claim 1 , wherein the first passage member and the sealing member apply pressure in a penetration direction of the connection passage. 
     
     
         5 . The sealing member according to  claim 1 , wherein the sealing member and the second passage member apply pressure in a direction perpendicular to a penetration direction of the connection passage. 
     
     
         6 . The sealing member according to  claim 1 , wherein the first passage member comprises a filter intersecting the passage thereof. 
     
     
         7 . The sealing member according to  claim 1 , wherein the second passage member comprises projecting portion provided with the passage thereinside and to be inserted into the second hole toward the first hole of the sealing member. 
     
     
         8 . The sealing member according to  claim 7 , wherein the tuber portion keeps the projecting portion from projecting out of the first hole. 
     
     
         9 . A liquid ejecting apparatus comprising:
 a sealing member according to  claim 1 ;   a first passage member abutting against the first end surface of the sealing member; and   a second passage member inserted into the connection passage of the sealing member.   
     
     
         10 . The sealing member according to  claim 8 , wherein an inner surface of the connection passage is configured to come into intimate contact with an outer circumferential surface of a part of the second passage member which is provided with the passage thereinside. 
     
     
         11 . The sealing member according to  claim 8 , wherein in diameter the first hole is substantially equal to an opening of the first passage member which connects the first hole. 
     
     
         12 . The sealing member according to  claim 8 , wherein the first passage member and the sealing member apply pressure in a penetration direction of the connection passage. 
     
     
         13 . The sealing member according to  claim 8 , wherein the sealing member and the second passage member apply pressure in a direction perpendicular to a penetration direction of the connection passage. 
     
     
         14 . The sealing member according to  claim 8 , wherein the first passage member comprises a filter intersecting the passage thereof. 
     
     
         15 . A liquid ejecting apparatus comprising:
 a sealing member according to  claim 8 ;   a first passage member abutting against the first end surface of the sealing member; and   a second passage member inserted into the connection passage of the sealing member.