CN1185379A

CN1185379A - Ink box

Info

Publication number: CN1185379A
Application number: CN97121762A
Authority: CN
Inventors: 田中浩一
Original assignee: NEC Corp
Current assignee: NEC Corp
Priority date: 1996-12-17
Filing date: 1997-12-17
Publication date: 1998-06-24
Anticipated expiration: 2017-12-17
Also published as: AU722862B2; KR19980064278A; KR100248322B1; CN1072119C; JPH10166610A; AU4840397A; CA2224961A1; EP0849085A2; EP0849085A3

Abstract

An ink cartridge comprises a housing defining an ink chamber and a negative pressure chamber. The negative pressure chamber receives therein a porous body impregnated with liquid ink and having a mound at the top surface for defining a space between the top surface and the inner wall of the negative pressure chamber. A vent communicated with the space through a uniform passage and an ink outlet port are disposed at the bottom of said negative pressure chamber for alignment in a plane and sealed by a common seal tape.

Description

Print cartridge

The present invention relates to a print cartridge, relate in particular to print cartridge with a negative pressure cavity.

Please refer to Fig. 1, usually the first common print cartridge by symbol 120 expressions comprises the box body 124 with a black liquid outlet 128, cap 126 with an air vent 125, a porous body 123 that is soaked with black liquid is arranged in the box body 124, one filter 122 is configured between black liquid outlet 128 and the porous body 123, exports 128 in order to remove the powder that flows from China ink by black liquid.In JP-A-2 (1990)-34351, this print cartridge has been described.Space 127 is configured between porous body 123 and the cap 126, contacts with air vent 125 in order to prevent black liquid.The structure of print cartridge 120 will prevent to leak owing to the caused swing of the motion of the record head that is associated or vibration cause black liquid effectively.

Suppose that the amount that is soaked in black liquid maximums in the porous body 123 is 100 (%), be soaked in black liquid in the porous body 123 usually greatly about about 80%, because will prevent because the black liquid that the motion of record head may cause leaks from porous body 123 by air vent 125.As long as set up box body 124, as shown in Figure 1, such structure just can prevent effectively that black liquid from leaking.

The installation of print cartridge can realize by following two kinds of methods: the one, and porous body 123 reinstalls after being soaked with black liquid; Another kind is that porous body 123 is packed into and more black liquid irritated behind the box body 124 in the porous body 123.In last example, cap 126 generally is that O shape ring is tightened and is sealed on the box body 124, and need not bonding or supersonic welding connection technology, because bonding or ultrasonic bonding is all had any problem.In one example of back, bonding or ultrasonic bond technology are used for the installation of cap 126 and box body.Yet, in one example of back, should use adhesive after the installation to guarantee the sealing between cap and the box body.Then, with syringe needle black liquid is injected porous body by filter.

In first kind of common print cartridge, place if the print cartridge of the cap 126 that will have is long-time downwards, direction along the box body axis applies vibration to box body 124, if the amount that is immersed in the black liquid in the porous body 123 no better than 100%, maybe will inject in the box body 124 above 100% China ink amount, so, black liquid leaks by the air vent 125 of cap 126 inner wall surface probably, and tape deck inside or record-paper are stain.

See also Fig. 2, second kind of common print cartridge is usually by symbol 100 expressions, and it comprises a box body 101, has a cap 108, one porous bodies 104 of an air vent 106, and it is to make with Ethyl formate, for example for soaking into black liquid therein; The waterproof porous body made from polyethylene 103 is placed between porous body 104 and the air vent 106 and with air vent 106 and contacts.Because black liquid is not immersed in the waterproof porous body 103, thereby, guaranteed the circulation of air, so that the possibility that black liquid leaks is minimum by its three-D space structure.In addition, even some position of waterproof porous body 103 may be by black liquid frozen plug, waterproof porous body 103 loose structures have still guaranteed the unimpeded of air.

The shortcoming that in first kind and second kind of common print cartridge, exists just as described above, promptly in whole black chamber, the existence of porous body has increased the volume of print cartridge, and the total amount that wherein can hold black liquid is no more than tens percent of print cartridge total measurement (volume) at the most.

The print cartridge that the third is common is described in JP-A-8 (1996)-174858, and it has a less porous body.Specifically, please refer to Fig. 3, the third common print cartridge 200 comprises a box body 201, its qualification hold black liquid therein a black chamber 203 and a negative pressure cavity 202 its be connected with black chamber 203 by an internal orifice 205 and hold a porous body 204 that is soaked with black liquid therein.Box body 201 has a black liquid mouth 207 and an air vent 212, and it communicates with negative pressure cavity 202 by having the passage 206 of an expansion channel section 211.The channel section 211 of this expansion has prevented that black liquid from leaking from air vent 212, and does not have the black chamber 203 of porous body just to increase the ink amount that can hold in the print cartridge.

The purpose of this invention is to provide and a kind ofly make it the print cartridge that prevents that black liquid from being leaked by air vent to simplify box body structure.

According to a kind of print cartridge provided by the invention, comprise: a box body, black liquid first chamber therein and second chamber that communicates with it are held in qualification, one porous body, it is contained in second chamber and has a hillock at its top surface and dashes forward to limit the space between the top surface and second chamber inner wall, this box body has an air vent and is interlinked to the outside for this space and box, and a flow export that black liquid is provided.

According to print cartridge of the present invention, the hillock of porous body is dashed forward and keep the space between porous body and inboard wall of cartridge, and this has prevented the contact between porous body and the air vent passage, thereby prevents that black liquid from leaking from air vent.

Above-mentioned purpose of the present invention and other purposes, feature and advantage please refer to accompanying drawing; By following description will be more apparent.

Brief description of the drawings

Fig. 1 is first kind of common print cartridge cutaway view;

Fig. 2 is second kind of common print cartridge cutaway view;

Fig. 3 is the third common print cartridge cutaway view;

Fig. 4 is the cutaway view of one embodiment of the invention print cartridge;

Fig. 5 is the detailed section view of porous body shown in Figure 4;

Fig. 6 A and 6B are the partial enlarged view of the improved embodiment print cartridge according to the present invention.

Now, with reference to accompanying drawing the present invention is carried out concrete description.

Please refer to Fig. 4, comprise according to one embodiment of the invention print cartridge 10: a box body 11, it limits first chamber or supplies to hold black liquid black sap cavity chamber 12 and second chamber or negative pressure chamber 13 therein, it is by there being a partition wall 22 that exchanges mouth 23 that black liquid chamber 12 is separated, should exchange mouth 23 and then this China ink liquid chamber 12 is communicated with this negative pressure chamber 13, porous bodies 14 that are contained in this negative pressure chamber 13 pour into black liquid therein.Being arranged on of porous body 14 leaves a space 15 between its top surface 14 and the box body 11.The whole area on these porous body 14 other each surfaces all contacts with box body 11 inwalls basically.

Box body 11 has a black liquid outlet 19 in the centre of negative pressure cavity 13 bottoms.By a filter 20, China ink outlet 19 is communicated with porous body 14, is soaked in black liquid in the interior porous body 14 of negative pressure cavity 13 in order to discharge.Box body 11 also has an air vent 18 and is configured on box body 11 edges, by air duct 17 in the space 15 place's openings 16, be connected with space 15 in the negative pressure chamber 13.In fact China ink outlet 19 and air vent 18 are configured on the plane of box body 11 bottoms, and print cartridge is sealed by sealing strip 21 before use, and passage 17 has a smooth section.

In the operation of embodiment of the invention print cartridge, export 19 with after the black liquid discharge by China ink, the pressure in negative pressure cavity 13 internal voids 15 becomes negative pressure, and air is introduced by air vent 18 and passage 17.Negative pressure stops porous body 14 interior black liquid to be leaked into the outside of print cartridge by passage 17 and air vent 18 in the space.

Please refer to Fig. 5, except the superior colliculus prominent 31 that is configured in its top surface, be actually a hexahedron.Porous body 14 has a maximum height h ₁With a minimum constructive height h ₃, shown in solid line, the maximum height h after its system is joined ₂, just shown in dotted line, wherein: h ₃＜h ₂＜h ₁After being installed in porous body 14 in the negative pressure cavity 13, at height h ₁With height h ₂Mid portion 32 is down pushed by the inwall of box body 11 and makes porous body 14 have one at the top of porous body 14 to be cut into the steeple shape on plane, to leave space 15 in negative pressure cavity 13.

Porous body 14 base sections just in time are positioned at below the prominent 31 top 31a of hillock and are subjected to the very strong pushing of cavity inner wall near the black liquid outlet 19, its as a result the capillarity of porous body 14 be reinforced inside.

Please refer to Fig. 6 A and 6B, illustrate according to the follow-on partial sectional view of Fig. 4 embodiment print cartridge, air vent 41 and 42 is separately positioned on the top surface and the side surface in the negative pressure cavity 13 box bodys outside.Represent by numerical chracter identical in Fig. 6 A and 6B with parts similar in Fig. 4, omitted detailed description at this.But these remodeling still have the advantage similar to Fig. 4 embodiment.Although single sealing strip does not export for black liquid and air vent provides sealing.

Because the foregoing description only is for example, so the present invention is not limited in the above embodiments and various remodeling or exchange, and they can be at an easy rate made by the technical staff of the industry, but do not depart from the scope of the present invention.

Claims

1. print cartridge, comprise: a box body, it is defined as and holds black liquid first chamber therein and second Room that is connected with described first chamber, one be contained in the porous body in described second chamber and have a hillock at its top surface prominent to limit the space between described top surface and described second chamber, one inwall, described box body has an air vent to be communicated with described space and described box body outside, and the black liquid flow export of the black liquid of a supply.

2. print cartridge as claimed in claim 1 is characterized in that the passage that has a smooth cross section by one, and described air vent is connected with described space.

3. print cartridge as claimed in claim 1, it is characterized in that described black liquid flow export in fact just in time be arranged on prominent 31 tops of described hillock below.

4. print cartridge as claimed in claim 1 is characterized in that in fact described air vent and described black liquid flow export are arranged on the plane.

5. print cartridge as claimed in claim 4 is characterized in that described air vent and black liquid flow export are by a single seal sealing.

6. print cartridge as claimed in claim 1 is characterized in that the prominent pushing that is subjected to described second chamber inner wall of described hillock.