CN1163589A - Marking instrument - Google Patents

Abstract

A marking instrument, such as a reservoir pen, has a valve (10, 12) for controlling communication between a reservoir chamber (2) and a feed channel (7) extending through a feed member (6) to a marking tip. The feed member is retractable to open the valve when the tip is pressed against a surface. A subchamber (20) is confined by a diaphragm (8) sealingly connected between the feed member (6) and the barrel, and when the marking tip is lifted from the surface, the diaphragm pushes the feed member (6) forwardly so that the valve closes, after which the volume of the subchamber (20) increases so that ink is drawn both through the channel (7) from the tip.

Description

Marking tool

The present invention relates to a kind of marking tool, as the equipments of recording of color pen, felt material stylus (felt tip), fiber stylus, ball pen and other type, wherein marking fluid is delivered to marker nib in liquid-storing cavity.The invention particularly relates to such marking tool, that is, wherein provide when needing to make this liquid flow to the device of marker nib to the pressurization of the marking fluid in liquid-storing cavity.A kind of marking tool has for example been described in the WO93/05966 patent application, wherein liquid-storing cavity is partly demarcated by barrier film, draw the element have marker nib when writing on a surface when this marker nib and can be withdrawn in this instrument simplified liquid so that make described membrane displacement in the compressed liquid reservoir vessel.After the power removal that puts on the nib, this barrier film is used for separating liquid-storing cavity inside with by its conduit that supplies liquid on the nib also as a valve member, and described barrier film is got back to top position.Have been found that, in some cases, when removing the power that applies to nib owing to nib is pressed in surperficial going up, particularly when including many sticky ingredients in the index liquid, marking fluid still can continue to flow to or be penetrated into marker nib, even include a valve that is used for pathway closure between liquid-storing cavity and the nib, still can find above-mentioned problem.

The purpose of this invention is to provide a kind of measure that addresses the above problem, therefore the invention provides a kind of marking tool, this marking tool comprises a liquid-storing cavity that is used for splendid attire marking fluid supply liquid, one is used for marking fluid is coated in a lip-deep marker nib, the valve gear of closing usually that circulates between control liquid-storing cavity and the service duct, by nib being pressed on described surface, described marker nib is opened described valve with shrinking, and moves forward in the process in the pen pass when valve gear cuts out after and be used for from the device of nib imbibition body by service duct.

Easily, the secondary cavity that can change volume links to each other with service duct, and after valve gear cut out, during nib moved forward, the volume of described cavity increased.In a preferred construction, this pair cavity is the auxiliary liquid-storing cavity that is used for marking fluid, and is partly surrounded by an elastically deformable spare, and this elastically deformable spare is also as marker nib is advanced to its anterior position.The fluid service duct forms in the delivery member in the cylindrical shell of this instrument in axial sliding, and liquid-storing cavity is closed in this instrument, and elastically deformable spare is also connecting between delivery member and cylindrical shell hermetically of ring-type.Thereby when opening valve gear and cause that liquid is sent to marker nib reliably for liquid pressurization in main liquid-storing cavity, can operate this elastic component.In addition, for further simplifying this structure and assembly, described elastic component can form the valve seat of a valve gear.Like this, in the preferred embodiment, (describe this embodiment below with reference to the accompanying drawings in detail), this elastically deformable spare comprises that one is connected to first ring on the delivery member hermetically, be connected on the cylindrical shell second ring that forms a valve seat hermetically, and an annular deformable membrane spare that interconnects first and second rings.The accurate shape of valve gear is not crucial, and it can have any pattern easily, as a clack valve, or globe valve, have one by delivery member contraction with its from it the seat lifting and reasonably push it to the valve member of a closed position by spring assembly.The volume of secondary cavity or auxiliary chamber needn't be too big, because when valve is opened, the supply of liquid master liquid-storing cavity is used for satisfying the demand of marker nib.,, form a negative pressure, be used for during the process that moves forward of the final stage of nib, liquid being sucked back from nib because the volume of secondary cavity increases after valve is closed.Because only the final stage that moves at nib produces a negative pressure, so suction force is not very big so that the air suction is held in the liquid systems, when next step needs, this will disturb the mild supply reliably of liquid.

By following detailed description of the preferred embodiment, and can there be one more fully to understand to the present invention with reference to the accompanying drawings, wherein:

Fig. 1 is the section axial cross section by a marking tool of the present invention, shows when not having power to put on the marker nib element at rotine positioning;

Fig. 2 is when being pressed in surface marking tool shown in Fig. 1 when go up preparing to write down a track of index liquid on the marker nib;

Fig. 3 is expression when the nib of described instrument instrument illustrated in figures 1 and 2 when mention on described surface, and

Fig. 4 is the figure that is similar to Fig. 1 that expression one improves structure.

Described marking tool, a retaining pen for example has a cylindrical shell that comprises housing 1, and this housing surrounds and is used to store the index liquid of certain volume, a main storage chamber 2 of (being ink wherein during pen).Described storage chamber is a kind of like this storage chamber, and promptly internal volume reduces when using up ink.The rear end of cavity can be closed by the ink of calking for this purpose, and as the of a grease piston, when ink was consumed, it moved the ink column that comprises in the described cavity to follow along cavity.When using ink, just do not need to supply air to by this way and occupy the space of vacateing by ink in the described cavity.Certainly other form of storage chamber also allows as a contractile soft leather bag.What be installed to described housing front end is a cylindrical shell end 3, and this simplified end 3 has a tapered segment that leads to the convergent of cylinder fore-end 5.One delivery member 6 can endwisely slip in fore-end 5, and this delivery member 6 comprises that one has the pole or the round bar of axial hole 7, and this axial hole forms the ink-feed channel that the ink guiding is contained in the marker nib of delivery member front end.Itself does not show marker nib in the drawings, and its concrete shape is not a content of the present invention.This nib for example can be a felt material nib, a fiber nib, and a ball-point pen tip, a ball, a cartridge type nib or any other are generally used for being equipped with nib in the equipments of recording of liquid-storing cavity.Having the part that an external diameter reduces and be positioned in its tail end delivery member 6 on the annular convex shoulder that forms on the delivery member is a forward or interior ring 9 of an elastically deformable spare, and this elastically deformable spare in the embodiment that has described is a diaphragm member 8 as bellows.This diaphragm member comprises a back outer annular thing 10, and this ring 10 is sealed to be installed on the cylindrical shell and to be clamped in the front end of housing 1 by being inserted in cover 11 between housing 1 and the leading section 3.The inner edge of this ring 10 has a diameter bigger than the end section diameter of delivery member, and has formed a valve seat that matches with the valve member that is ball 12 shapes.Described valve seat constitutes a valve gear of closing usually with combining of valve member, the circulation between this valve gear control liquid-storing cavity 2 and the ink-feed channel 7.Extension between the ring 9 and 10 of diaphragm member is the bellows of dispersing backward 13 of an elastically deformable.Diaphragm member 8 elastic force are used for advancing delivery member 6, and therefore advance tip of stylus, to a front position, when the time in this position, by the tail end and the ball valve 12 of delivery member, described diaphragm member is bundled into a secondary cavity 20 of small size that circulates mutually by radial hole 14 in delivery member and ink-feed channel 7.Give globe valve 12 biasing forward by one by the helical spring 15 of spring support support, it is cooperated with valve base sealing, described spring support 16 has the right-angled intersection tee section, and has groove to be used for holding described spring on its wing plate.

Under the described normal inoperative condition of Fig. 1, the tail end of delivery member and ball valve separate a little distance, and described ball valve keeps cooperating with valve base sealing, thereby main liquid-storing cavity 2 is kept apart with secondary cavity 20 and service duct 7.By writing pressure-tip of stylus is acted on the surface normally, supply bar 6 just is recovered in the cylindrical shell and its tail end at first occupies gap between delivery member and the globe valve.Thereby this initial withdrawal causes volume that bellows partly reduces secondary cavity and gives the liquid pressurization comprise and make liquid be discharged to service duct and be supplied on the tip of stylus in this pair cavity.The biasing force that delivery member overcomes spring 15 when further regain is mentioned ball when leaving its valve seat, just sets up the circulation between main liquid-storing cavity 2 and the secondary cavity thus.When further withdrawal delivery member, the bellows part 13 inside contractions of diaphragm member further reduce the volume of secondary cavity and give and hold the ink pressurization that comprises in the liquid systems, thereby force ink to flow to tip of stylus by service duct 7.The situation of Fig. 2 description that Here it is.Then when this tip of stylus left described surface, for example, when having write a word, diaphragm member S pushed ahead delivery member 6, and its bellows part 13 dilates again.The ink that the increase of the volume of formed secondary cavity 20 is the autonomous liquid-storing cavity 2 of origin by the valve of still opening at the beginning replenishes.After valve cuts out, delivery member still continues to move on a small quantity forward, the increase of the secondary cavity volume that occurs in this a part of moving process causes a negative pressure that forms in this space 20, it will be used for ink being sucked back by service duct from nib, as shown in Figure 3.In this case, when nib when writing surface is mentioned, can prevent that excessive ink from accumulating on the tip of stylus, but act on again on the surface when nib that ink just is fed to the danger of having avoided lacking on the nib ink on the nib.By the ink resorption being limited in the preceding mobile end of delivery member, thereby can avoid air is drawn into the danger of disturbing the mild work of ink feeding system in the pen.

Be appreciated that the degree that has closed at the suction that reaches in the secondary cavity 20 when valve will depend on the shape of bellows and the situation that moves forward of delivery member, by selecting the shape and the gap of bellows, can regulate suction effect.

Improvement to the above-mentioned structure of holding the liquid pen is fine certainly, as long as it does not depart from the protection domain of following claims, Fig. 4 has described and comprised some this improved embodiment.Replace ball, the valve member 12 ' with a frustum conical surface that it has an arrangement to be used for cooperating with valve seat thus, for one of valve member given skew, can obtain a bigger valve opening, may be desirable if use this structure of a kind of ink of thickness.This valve member 12 ' can be by many, and for example eight around the isolated radial projection of this valve member guiding slidably in a housing.This circulation is to set up by a pair of complete relative groove 14 ' that extends along its length from the rear end of delivery member 6, rather than one with secondary cavity 20 link to each other with ink-feed channel 7 discontinuous mouthfuls 14.The extension mouth that is limited by these grooves can provide improved black properties of flow.For the more accurate position of front annular element 9 that diaphragm member 8 is provided, this delivery member has the cannelure that an annular element is placed in one.Other change will appear in the technical scope well known in the art.

Claims (8)

1. a marking tool comprises that one is used to hold the liquid-storing cavity of supplying marking fluid, one is used for marking fluid is coated onto a lip-deep marker nib, one with the service duct of liquid conducting to described nib, the normally closed valve gear that circulates between control liquid-storing cavity and the service duct, described marker nib is recoverable and open described valve when it acts on the surface, it is characterized in that, provide a kind of device to be used for after closing described valve gear, move forward in the process at nib and from nib, liquid is sucked back by service duct.

2. according to the described a kind of marking tool of claim 1, it is characterized in that a secondary cavity that can change volume links to each other with described service duct, during described nib moved forward after described valve gear cuts out, the volume of described cavity increased.

3. one kind according to the described marking tool of claim 3, it is characterized in that described secondary cavity is partly surrounded by an elastically deformable spare, and this elastically deformable spare is as pushing ahead described nib.

4. one kind according to claim 3 or 4 described marking tools, it is characterized in that described elastically deformable spare has formed a valve seat of valve gear.

5. one kind according to claim 3 or 4 described marking tools, it is characterized in that, described service duct is formed in the cylindrical shell of described instrument in axial sliding in the delivery member, and described elastically deformable spare be ring-type and be connected hermetically between delivery member and the cylindrical shell.

6. one kind according to the described marking tool of claim 5, it is characterized in that, the inner of described delivery member is configured to act on the valve body of valve gear and is used for opening described valve.

7. one kind according to one of any described marking tool in the claim 2 to 6, it is characterized in that, after valve was opened, between described nib retirement period, pressurization was sent to described nib with liquid from described liquid-storing cavity to the liquid in the described liquid-storing cavity thereby the volume of described secondary cavity reduces to be used for.

8. a marking tool comprises that one surrounds the cylindrical shell that is used to hold the liquid-storing cavity of supplying index liquid, one can be in axial sliding with respect to institute's this cylindrical shell of art and have a feed spare of a marker nib at its front end, one by the service duct of being used for of extending of described delivery member with the described nib of guiding fluid, one is connected between described delivery member and the described cylindrical shell hermetically and forms the cyclic spring deformable piece of a secondary cavity that communicates with described service duct, an and normally close valve device that circulates between control described liquid-storing cavity and the described secondary cavity, by nib is acted on the surface, described valve gear is opened thereby described marker nib is retracted.

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