CN1211210C

CN1211210C - Ink box

Info

Publication number: CN1211210C
Application number: CN 02115259
Authority: CN
Inventors: 萧庆国
Original assignee: Print Rite Unicorn Image Products Co Ltd
Current assignee: Print Rite Unicorn Image Products Co Ltd
Priority date: 2002-05-23
Filing date: 2002-05-23
Publication date: 2005-07-20
Anticipated expiration: 2022-05-23
Also published as: CN1459375A

Abstract

The present invention relates to an ink box for an ink jet printer, which comprises an ink cavity with ink, an ink outlet, and a unidirectional valve positioned between the ink cavity and the ink outlet, wherein the ink cavity is communicated with atmospheric air through an air hole on a box cover. An ink supply cavity is formed between the unidirectional valve and the ink outlet, and an ink supply needle false body of the printer is arranged in the ink supply cavity. When the ink supply needle enters the ink supply cavity from the ink outlet, the false body in the same volume leaves the ink supply cavity. A passage is arranged between the ink cavity and the ink supply cavity, and a pressure relief device is arranged in the passage. The ink can not leak during the installation of the ink box, and a print head can not be damaged.

Description

Print cartridge

Technical field

The present invention relates to the print cartridge that ink-jet printer uses.

Background technology

Ink-jet printer uses a print cartridge that can separate with main frame to come to the printhead ink supply usually, the primary structure of print cartridge is that a black chamber that holds black liquid is arranged, a pore that is communicated with black chamber and atmosphere is arranged on the lid of China ink top of chamber, an ink outlet port is arranged at the bottom, when print cartridge is packed printer into, ink outlet port or the seal that is contained in the ink outlet port dock with the sealing of printhead ink supply pin, for guaranteeing that the China ink in the black chamber can feed to printhead continuously and stably, technical solution early is to put into porous mass in black chamber, sponge for example, this class print cartridge has solved the problem of ink supply continous-stable well.

The print cartridge of inserting sponge has produced another new problem simultaneously, is exactly that sponge has occupied more black chamber volume, and the Rong Moliang of print cartridge is reduced greatly, and the user needed the frequent print cartridge of changing when printing amount was big.In addition, it is more to change in the sponge of print cartridge residual China ink, contaminated environment.The publication No. that order is announced in October 25 calendar year 2001 is in the WO 01/78987A1 international application, the applicant has proposed a kind of sponge that need not, can guarantee simultaneously the technical solution of continous-stable ink supply again, its primary structure and principle are referring to Fig. 3, print cartridge has a black chamber 22 that is used for Rong Mo, the China ink top of chamber has a pore that is communicated with atmosphere 27, there is an ink outlet port 26 to the printhead ink supply in the China ink chamber, being provided with one at ink outlet port can guarantee and the close-connected seal 25 of printhead ink supply pin, the characteristics of this scheme are to be provided with a check valve 23 that only allows black liquid to flow to ink outlet port 26 from black chamber 22 between black chamber 22 and ink outlet port 26, force value when the black relatively chamber 22 of ink outlet port 26 is zero or timing, check valve place closed condition is opened during for negative value.Facts have proved, adopt the print cartridge of this technical scheme can replace sponge aspect the continous-stable ink supply, thereby, when the storage China ink is more relatively, also have the few advantage of residual China ink amount.

Use by a period of time, when the print cartridge of finding this employing check valve is installed first, the phenomenon generation of polluting print media or printer from the ink outlet port ink leak is often arranged, and the situation that occurs the printhead damage once in a while mostly occurred also in the moment of changing this class print cartridge.

Referring to Fig. 3, after the above-mentioned phenomenon that check valve class print cartridge is produced is observed and is analyzed, the applicant recognizes that the origin cause of formation is to form an ink supply chamber 24 between check valve 23 and seal 25 also essentially, in the ink supply chamber 24 of new print cartridge ink and airtight by check valve 23 and seal 25 is arranged.When new print cartridge is installed, ink supply pin moment puncture through seal part enters the ink supply chamber, because what reach the Incoercibility of liquid to the volume of its ink supply pin that is held of volumetric ratio in ink supply chamber at the worst, ink in the ink supply chamber is subjected to bigger pressure in this moment, to extrude via printhead from ink supply pin shank endoporus, pollute printer and print media, when this pressure was enough big, black liquid can the impact failure printhead.

Summary of the invention

An object of the present invention is to propose a kind of new construction of check valve print cartridge, it can insert the moment of ink outlet port at the ink supply pin, effectively avoids ink pressurized in the ink supply chamber.

Another object of the present invention is to solve the black technological problems of the existing filling of print cartridge that adopts check valve.

Be real above-mentioned purpose, the technical solution used in the present invention is as follows,

Parts such as the pore of print cartridge on comprising box body, lid, black chamber, check valve, ink outlet port and the structure, the origin cause of formation at the generation of ink supply chamber high pressure, in the ink supply chamber, preset the prosthese of an ink supply pin, when the ink supply pin progressively enters the ink supply chamber, prosthese progressively withdraws from the ink supply chamber, like this, the black liquid in the ink supply chamber can not be squeezed, thereby has effectively avoided the generation of ink leak and damage printhead phenomenon.The volume that prosthese withdraws from the ink supply chamber preferably with enter the ink supply chamber in the volume of ink supply pin identical, this the point, accomplish easily at the prosthese that the printer Design of different model is different, both volumes are slightly during deviation, because difference is much smaller than the volumetric values in ink supply chamber, the malleation of its generation or negative pressure can not cause ink leak yet, more can not cause the damage of printhead.

Usually, can be designed to the version that prosthese is shunk back to black chamber, at this moment, also can be in prosthese China ink chamber end and prosthese intersegmental a passage be set, be used for black chamber of UNICOM and ink supply chamber, when being convenient to the print cartridge manufacturing, this irritates China ink to two chambeies, when the ink supply pin inserted the ink supply chamber fully, this passage became blind vias, and promptly the passage between two chambeies is cut off, open and close by the negative pressure value decision of check valve, carry out normal print job according to black relatively chamber in the ink supply chamber.

For technique scheme of the present invention is had clearer understanding, be described in further detail below in conjunction with embodiment and accompanying drawing thereof.

Description of drawings

Fig. 1 is the structural representation of first embodiment;

Fig. 2 is the schematic diagram that the ink supply pin inserts first embodiment;

Fig. 3 is the structural representation of prior art.

The specific embodiment

Must be stressed that for outstanding explanation the present invention to the contribution of prior art with narrate simple and directly, all omitted the lid that has air connectivity hole in all embodiment accompanying drawings of the present invention.The polychrome print cartridge, identical on technical conceive as three looks, the five colors etc. with monochromatic print cartridge, but be that separate structure and the parts of many covers are arranged, therefore, embodiment is that example describes with monochromatic print cartridge.

Embodiment:

Referring to Fig. 1, Fig. 2, ink outlet port is built-in with a seal 6, block 5 is connected with seal 6 by very thin annular membrane, between China ink chamber 1 and ink outlet port a check valve is arranged, this check valve is combined by the end cover 10 that has through hole 8, the gland 13 that has the spool 9 of central through hole 12 and have a through hole 11, the elasticity of spool 9 by self having that elastomeric material is made is pressed on the valve face of gland 13 head that has central through hole 12.Ink supply chamber 7 is the spaces between valve face and block 5.After entering, ink supply pin 15 on the axis at place a prosthese 4 is arranged, prosthese 4 and lining 2 matched in clearance that are fixed on the box body, between the two close property when sealing ring 3 guarantees that prostheses 4 relative linings 2 move axially, for guaranteeing the equal-volume replacement, prosthese 4 should have identical area of section with ink supply pin 15, and identical largest outer diameter is promptly arranged.Prosthese 4 in black chamber 1 an end and the prosthese stage casing between a passage 14 is arranged, do not sting fashionablely at the ink supply pin, passage 14 works to be communicated with black chamber and ink supply chamber, from making the technological angle of print cartridge, this is convenient to make when negative pressure is irritated China ink, and two chambeies are isobaric simultaneously injects.Obviously, the version of passage 14 can also be the groove that is positioned on the prosthese outer wall.When ink supply pin 15 thrust seal 6, circular membrane was broken, and block 5 comes off, and withdrawed from ink supply chamber 7 ink supply pin 15 pushing tow prostheses 4 equal-volumes, and when in place, passage 14 whole sealed circles 3 become blind vias every outside ink supply chamber 7.

Claims

1, print cartridge comprises by pore on the lid communicating with atmosphere and being filled with the black chamber, ink outlet port of ink and the check valve between black chamber and ink outlet port, and form an ink supply chamber between check valve and the ink outlet port, ink outlet port is equipped with seal, it is characterized in that:

The ink supply chamber is built-in with printer ink-providing pin prosthese, when the ink supply pin when ink outlet port enters the ink supply chamber, prosthese has roughly the same volume to withdraw from the ink supply chamber.

2, print cartridge according to claim 1 is characterized in that: described prosthese one end is arranged in black chamber, and there is an axial passage in this end to described prosthese stage casing.

3, print cartridge according to claim 1 is characterized in that: the prosthese in above separate black chamber, check valve, ink supply chamber, ink outlet port and the ink supply chamber of 3 covers or 3 covers is arranged in the same box body.