JPS60171976U

JPS60171976U - pump

Info

Publication number: JPS60171976U
Application number: JP5988384U
Authority: JP
Inventors: 岸本　充; 重井　正博; 一樹小原; 鶴田　慶一
Original assignee: 沖電気工業株式会社
Priority date: 1984-04-25
Filing date: 1984-04-25
Publication date: 1985-11-14

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Brief explanation of the drawing]

第１図は従来のインクジェットプリンタのキャリッジ搭
載型インク供給装置の概略構成図、第２図は従来の加圧
用ポンプの断面−、第３図はその部分拡大図で、ａは加
圧状態時、ｂはインク吸入状態時を示す図、第４図ａ、
　ｂ、第５図ａ、　ｂは従来の加圧ポンプが有する問題
点の説明図、第６図は本考案ポンプの一実施例を示すダ
イヤフラムを含む部分構成図で、ａはインクが加圧され
た時ツタイヤフラムの状態図、ｂはインク吸入時のダイ
ヤフラムの状態図、第７図、第８図、第９図は同じくそ
のダイヤプラム平坦部に設けた突起部の実施例を示す図
である。１３・・・シリンダ、１４・・・ピストン、１５・・田
ツド、１６・・・ダイヤフラム、１６ａ・・・突起部（
ビート）、１７・・・偏心カム、１８・・・復帰スプリ
ング、１９．２０・・・逆止弁。／？　　　、２／　　　／３ｂ（ａ）　　　　　（ｂ）Fig. 1 is a schematic configuration diagram of a conventional carriage-mounted ink supply device of an inkjet printer, Fig. 2 is a cross-sectional view of a conventional pressurizing pump, and Fig. 3 is a partially enlarged view of the same, where a is a pressurized state; b is a diagram showing the ink suction state, Fig. 4a,
Figures 5a and 5b are explanatory diagrams of problems with conventional pressurizing pumps, Figure 6 is a partial configuration diagram including a diaphragm showing an embodiment of the pump of the present invention, and Figure a is a diagram showing the structure of a pump in which ink is pressurized. FIG. 7 is a diagram showing the state of the diaphragm at the time of ink suction, and FIGS. 7, 8, and 9 are diagrams showing examples of protrusions provided on the flat portion of the diaphragm. 13...Cylinder, 14...Piston, 15...Dad, 16...Diaphragm, 16a...Protrusion (
Beat), 17... Eccentric cam, 18... Return spring, 19.20... Check valve. /? , 2/ /3b (a) (b)

Claims

[Scope of utility model registration request]

The suction port and the discharge port each have a breech valve, and a diaphragm is provided on the opposite side of the pressurizing chamber and pressurized by the piston and the rond, and the piston is moved in one direction to reduce the pressure inside the pressurizing chamber. A pump that sucks liquid into a pressurized chamber from a pump, then pressurizes the pressurized chamber by moving a piston in the opposite direction, and discharges the liquid in the pressurized chamber from a discharge port,
A pump characterized in that a projection is provided on at least one of the pressure contact surfaces of the piston of the diaphragm and the iron.