WO2018205669A1 - 一种直液式书写工具 - Google Patents

一种直液式书写工具 Download PDF

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Publication number
WO2018205669A1
WO2018205669A1 PCT/CN2018/071970 CN2018071970W WO2018205669A1 WO 2018205669 A1 WO2018205669 A1 WO 2018205669A1 CN 2018071970 W CN2018071970 W CN 2018071970W WO 2018205669 A1 WO2018205669 A1 WO 2018205669A1
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WO
WIPO (PCT)
Prior art keywords
gas
liquid
ink
balancer
tank
Prior art date
Application number
PCT/CN2018/071970
Other languages
English (en)
French (fr)
Inventor
解思鹏
Original Assignee
青岛昌隆文具有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from CN201720528082.6U external-priority patent/CN207449463U/zh
Priority claimed from CN201710335298.5A external-priority patent/CN106985572B/zh
Application filed by 青岛昌隆文具有限公司 filed Critical 青岛昌隆文具有限公司
Priority to EP18759540.0A priority Critical patent/EP3424746B1/en
Priority to US16/086,289 priority patent/US10611185B2/en
Priority to ES18759540T priority patent/ES2874657T3/es
Publication of WO2018205669A1 publication Critical patent/WO2018205669A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K5/00—Pens with ink reservoirs in holders, e.g. fountain-pens
    • B43K5/02—Ink reservoirs
    • B43K5/10—Ink reservoirs with reserve ink chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K8/00—Pens with writing-points other than nibs or balls
    • B43K8/02—Pens with writing-points other than nibs or balls with writing-points comprising fibres, felt, or similar porous or capillary material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K1/00—Nibs; Writing-points
    • B43K1/12—Writing-points comprising fibres; Felt pads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K5/00—Pens with ink reservoirs in holders, e.g. fountain-pens
    • B43K5/18—Arrangements for feeding the ink to the nibs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K7/00—Ball-point pens
    • B43K7/01—Ball-point pens for low viscosity liquid ink
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K7/00—Ball-point pens
    • B43K7/02—Ink reservoirs; Ink cartridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K7/00—Ball-point pens
    • B43K7/02—Ink reservoirs; Ink cartridges
    • B43K7/08—Preventing leakage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K8/00—Pens with writing-points other than nibs or balls
    • B43K8/02—Pens with writing-points other than nibs or balls with writing-points comprising fibres, felt, or similar porous or capillary material
    • B43K8/04—Arrangements for feeding ink to writing-points
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43K—IMPLEMENTS FOR WRITING OR DRAWING
    • B43K8/00—Pens with writing-points other than nibs or balls
    • B43K8/02—Pens with writing-points other than nibs or balls with writing-points comprising fibres, felt, or similar porous or capillary material
    • B43K8/04—Arrangements for feeding ink to writing-points
    • B43K8/06—Wick feed from within reservoir to writing-points
    • B43K8/08—Wick separate from writing-points

Definitions

  • the invention relates to a liquid-liquid writing instrument, which is a writing instrument in which an ink is directly stored in a liquid form in a pen body, and can be used in the fields of cultural education, medical or industrial, etc. Liquid, and the writing, marking and coating device of the liquid is realized by a certain liquid discharging device.
  • Marker pen is a kind of writing instrument, especially a marker pen with low surface tension ink of various solvents. It is a widely used coating writing instrument. Due to the low surface tension of the ink, it is prone to problems such as ink leakage, so the marker pen Mainly used is the cotton core ink storage structure made of fiber, but the cotton core ink storage structure will have ink residue, and the ink consumption during the writing process will continue to decrease, and the stability of the writing process is not enough.
  • the patent CN01809151.2 discloses a writing instrument which directly stores ink through a plurality of wall-separated ink tanks, each of which has a function of retaining ink under the action of capillary force.
  • the holes are communicated and gas-liquid exchange is achieved by the gap between the ink supply member and the wall.
  • patent CN200480043409.6 discloses a liquid supply device for storing ink by means of a partition wall projecting portion higher than a liquid level of a liquid stored in the liquid storage chamber, and optimally placing an ink absorber at the tail of the ink supply body. Used to provide the ink needed for writing.
  • Patent CN201310398639.5 discloses a direct-liquid writing instrument which provides gas-liquid exchange by providing a gas guiding device and an ink guiding device which communicate with the ink tube and the storage tube on the partition wall, and provides two solutions.
  • One solution is a gap scheme with the ink-inducing member similar to the patent CN01809151.2, and the other is realized by a separate air guiding hole.
  • Patent CN201510887830.5 discloses a direct liquid water trap, wherein an ink storage structure formed between the outer circular wall and the bottom circular wall by providing at least one groove is provided The layers of ink are separated. The principle is to separate the ink in different bins, to achieve ink discharge in the order of the ink tank, and to improve the ink leakage resistance.
  • the above patent also uses the gap between the ink supply member and the water trap to exchange air.
  • the ink supply and air exchange of the ink tank are realized by the same groove. Since the relatively independent passage cannot be achieved, the ventilation process is very complicated and difficult to control.
  • the patent has the problem that it cannot be mass-produced in practice. The reason is that the volume occupied by the water trap in the ink tank is large. If the water trap is placed after the ink is filled first, the ink overflows and the air pressure in the ink tank rises. On the contrary, if the water trap is placed first and then filled, the mass transit time cannot be achieved because the passage into each compartment is small and the filling time is too long.
  • Patent US6659671 discloses a liquid writing instrument which also achieves gas-liquid exchange by the gap between the ink supply member and the partition wall, resulting in a problem that the process is not easily controlled.
  • Patent CN200810097132.5 discloses a direct liquid type writing instrument which realizes the ink supply control of the writing process through two independent air guiding liquid guiding tubes. Since the two air guiding liquid guiding tubes independently adjust the air inflow, there are two Balance problems during use.
  • the invention provides a direct liquid writing tool, which realizes precise adjustment of ink and air changes during writing by setting a plurality of gas-liquid balancers, and continuously realizes ink and air pressure through the action of the overflow tank during writing.
  • the dynamic balance between them ensures smooth and stable writing while ensuring that ink leakage is less likely to occur during writing and storage.
  • a direct liquid writing instrument comprising:
  • a pen body for accommodating ink and forming a body of the writing instrument
  • a writing element mounted on the head of the pen body
  • An ink absorbing body mounted at a rear end of the writing element
  • a fiber water guiding core which is installed in the pen body, runs through the ink absorbing body, the front end is in contact with the writing element, and the rear end is connected with the ink tank formed by the inner body cavity of the pen;
  • the marker pen ink generally has a low surface tension, the risk of ink leakage is likely to occur, so when the temperature rises or the internal pressure increases, too much ink flows along the fiber water core to the writing element end, and the fiber relay core is supersaturated. State, when flowing to the position of the gas-liquid balancer overflow tank, since the fiber relay core is in close contact with the overflow tank, the capillary attraction from the saturated region to the unsaturated region acts, so the super-saturated ink will overflow The flow cell flows into the gas-liquid balancer to achieve a buffering effect.
  • the ink absorbed in the fiber relay core is continuously consumed, the volume of air in the ink tank is continuously increased, and at this time, the external air pressure will have a tendency to be greater than the internal ink cartridge pressure, especially during rapid writing, the writing process.
  • the ink consumption is greater than the speed at which the fiber relay core absorbs ink from the ink tank, and the fiber relay core is undersaturated. Because the fiber relay core is in close contact with the overflow groove, there is capillary attraction from the saturated region to the unsaturated region. The action of the force, at this time, the ink moves from the gas-liquid balancer overflow tank to the fiber relay core. At the same time, the ink in the gas-liquid exchange tank reduces the gap, and the air is replenished from the outside to the ink tank along the gas-liquid exchange tank. To achieve a new balance between writing and consumption.
  • multiple gas-liquid balancers can be set. Synchronous, gas-liquid balancers can also be equipped with multiple gas-liquid exchange tanks. As a necessary condition, each gas-liquid exchange tank must pass through the overflow. The slot is connected to the relay core to ensure the realization of the balance.
  • One end of the overflow tank and the fiber relay core must be in close contact with zero clearance fit or interference fit, and the other end needs to communicate with the gas-liquid exchange tank, thereby functioning as a connection and a bond between the two.
  • the gas-liquid balancer can be formed by using an injection molding process using various plastic polymer materials, such as ABS, PP, PE, PMMA, PA66 and the like.
  • the gas-liquid exchange tank width A of the gas-liquid balancer is 0.05 mm to 0.40 mm.
  • the exchange groove width of the gas-liquid balancer can be calculated by the Laplace liquid surface tension equation to ensure that the ink and air generate sufficient capillary action in the gas-liquid exchange tank. Flow and exchange under force conditions. After calculation and actual different ink test optimization, it is preferred that the exchange groove width A is 0.05 mm - 0.40 mm.
  • the overflow tank width B of the gas-liquid balancer is the gas-liquid exchange tank width A.
  • the width of the overflow trough generally needs to be less than or equal to the width of the gas-liquid exchange tank.
  • the gas-liquid balancer is spaced apart from the inner circumferential surface of the writing element end by an interference fit of the step limit.
  • the outer circumference of the gas-liquid balancer needs to be interference-fitted with the pen body to ensure that the outer circumferential surface away from the end of the writing element is in a sealed state except for the gas-liquid exchange groove communicating with the ink tank, and the axial direction needs to be limited to prevent Inciting. Make sure that gas-liquid exchange occurs in the gas-liquid exchange tank.
  • the outer circumference of the gas-liquid balancer may form an ink buffer tank through a plurality of circumferential slits, and the buffer tank communicates with the gas-liquid exchange tank, and the axial width gap C of the slit is 0.05 mm to 0.50 mm.
  • the ink caused by the internal air pressure or the internal temperature rises, it enters the gas-liquid balancer to achieve the buffering effect.
  • the outer circumference of the liquid balancer is provided with a plurality of ink buffer grooves formed by the circumferential slits.
  • the overflow tank is disposed on an end surface of the gas-liquid balancer or an intermediate portion of the gas-liquid balancer and penetrates the inner hole wall.
  • the gas-liquid balancer forms a capillary action system, so the gas-liquid balancer can also function as an ink absorbing body, so the gas-liquid balancer can be optimally selected. As an ink absorbing body.
  • the ink absorbing body adsorbs the ink using a multi-voided fiber wick storage structure.
  • the ink absorbing body can be formed by winding various fibers such as polyester fiber, polypropylene fiber, and nylon fiber, and the gap between the fibers can generate a capillary force to realize the function of storing the ink.
  • the gas-liquid balancer is provided with a plurality of ink tank volumes separated by a plurality of independent gas-liquid balancers, wherein the volume relationship of the adjacent two ink tanks is:
  • the volume of the ink tank at the distal end is greater than or equal to the volume of the ink tank at the proximal end.
  • the volume of each of the separated ink tanks closest to the writing element is the smallest and gradually increases. .
  • the gas-liquid balancer axis from the farthest end of the writing element is provided with an axial limiting step of the fiber water guiding core, and the step circumference adopts a slit groove to realize the contact of the ink in the ink tank with the water guiding core.
  • the external environment communicates with the exchange channel of the gas-liquid balancer through the inner wall air passage of the pen from the end of the writing element.
  • the air can be replenished into the exchange tank of the gas-liquid balancer in time to ensure the smooth realization of gas-liquid exchange.
  • the batch assembly process that can be implemented is as follows: the gas-liquid balancer is assembled one by one in the pen body; after the assembly is in place, the filling needle with a diameter smaller than the diameter of the fiber core is used for injection filling, and is filled during the filling process. The position of the needle is moved up step by step, and different ink tanks are filled. After the filling is completed, the fiber water guiding core, the ink absorbing body, the writing component are assembled, and the sealing cap is fastened to form the final product.
  • the invention not only ensures the relative independence of the air guiding structure provided on the outer circumference of the gas-liquid balancer, but also realizes the ink exchange with the fiber water guiding core through the overflow groove, thereby ensuring the balance between each other.
  • the micro-instability of gas-liquid exchange during the writing process and the external environment change is improved.
  • the invention can set gas-liquid exchange tanks and ink buffer tanks and overflow tanks of different widths in gas and liquid according to different ink surface tension and viscosity conditions, and can adapt and control the balance and output of various inks by changing the width dimension. Ink has created favorable conditions for the achievability of mass production.
  • the invention can be applied to various writing instruments of low-viscosity ink, such as water-based ballpoint pen, permanent marker pen, whiteboard pen, industrial marker pen, medical marker pen, etc., and can further extend to various kinds due to its stable characteristics.
  • Coating tools such as make-up coating tools and painting materials for painting.
  • Figure 1 is a first embodiment of the present invention
  • FIG. 2 is a partial view of the gas-liquid balancer and the fiber water guiding core of the present invention
  • Figure 3 is a schematic view showing the movement of the ink in the gas-liquid balancer when the temperature is raised or the internal pressure is increased;
  • Figure 4 is a schematic view showing the movement of ink in a gas-liquid balancer during the writing process of the present invention.
  • Figure 8 is a cross-sectional view of the gas-liquid balancer and the pen body of the present invention.
  • FIG. 10, FIG. 11, and FIG. 12 are a cross-sectional view and a perspective view of a gas-liquid balancer for adding an ink buffer tank according to the present invention.
  • Figure 13 is a schematic view showing the movement of the ink in the gas-liquid balancer of the ink buffer tank when the temperature rises or the internal pressure increases;
  • Figure 14 is a schematic view showing the movement of the ink in the gas-liquid balancer of the ink buffer tank during the writing process of the present invention
  • Figure 15 is a second embodiment of the present invention.
  • 16 and 17 are cross-sectional views of the fiber water core tail portion of the present invention in cooperation with a gas-liquid balancer.
  • Figure 18 is a schematic view of the internal air passage of the pen body of the present invention.
  • Figure 19 is a third embodiment of the present invention.
  • 1 writing element 1 writing element, 2 ink absorbing body, 3 fiber water guiding core, 4 pen body, 5 gas liquid balancer, 6 ink tank VI, 7 ink tank VII, 8 ink tank VIII, 9 gas-liquid exchange tank, 10 overflow Flow cell, 11 ink buffer tank, 12 gas-liquid exchange tank, 13 ink adsorption body, 14 limit steps, 15 slots, 16 air channels.
  • the ink absorbing body is made of polyester fiber cotton, and the porosity is about 80%.
  • the specific structure is as follows:
  • a pen body 4 for accommodating ink and a body forming a writing instrument; a writing element 1 mounted on the pen body head; an ink absorbing body 2 mounted at a rear end of the writing element; and a fiber water guiding core 3 Mounted in the pen body, penetrating through the ink absorbing body, the front end is in contact with the writing element, and the rear end is in communication with the ink tank formed by the inner body cavity of the pen; and characterized in that at least one of the pen body is provided along the axial direction thereof a gas-liquid balancer 5, wherein the gas-liquid balancer 5 is installed in an annular gap formed by the fiber water-conducting core and the pen body, and one or the outer circumferential surface of the gas-liquid balancer 5 is disposed a plurality of gas-liquid exchange grooves 9 penetrating the outer circumferential surface thereof and having a capillary attraction effect on the ink; an overflow tank 10 is provided on a radial end surface of the gas-liquid balancer, and
  • the marker pen ink generally has a low surface tension, the risk of ink leakage is likely to occur, so when the temperature rises or the internal pressure increases, too much ink flows along the fiber water core to the writing element end, and the fiber relay core is supersaturated. State, when flowing to the position of the gas-liquid balancer overflow tank, since the fiber relay core is in close contact with the overflow tank, the capillary attraction from the saturated region to the unsaturated region acts, so the super-saturated ink will overflow The flow cell flows into the gas-liquid balancer to achieve a buffering effect. The flow direction of the ink is shown in Figure 3.
  • the ink absorbed in the fiber relay core is continuously consumed, the volume of air in the ink tank is continuously increased, and at this time, the external air pressure will have a tendency to be greater than the internal ink cartridge pressure, especially during rapid writing, the writing process.
  • the ink consumption is greater than the speed at which the fiber relay core absorbs ink from the ink tank, and the fiber relay core is undersaturated. Because the fiber relay core is in close contact with the overflow groove, there is capillary attraction from the saturated region to the unsaturated region. The action of the force, at this time, the ink moves from the gas-liquid balancer overflow tank to the fiber relay core.
  • the ink in the gas-liquid exchange tank reduces the gap, and the air is replenished from the outside to the ink tank along the gas-liquid exchange tank.
  • the ink flow direction is shown in Figure 4.
  • a plurality of gas-liquid balancers 5 can be provided. Synchronous, gas-liquid balancer 5 can also be provided with a plurality of gas-liquid exchange tanks. As a necessary condition, each gas-liquid exchange tank must pass The overflow tank communicates with the relay core to ensure the realization of the balance.
  • three gas-liquid balancers 5 are provided.
  • the three gas-liquid balancers 5 form three ink tanks in the pen body, which are an ink tank VI6, an ink tank VII7, and an ink tank VIII8. Since the three gas-liquid balancers 5 can buffer the overflowing excess ink step by step, in order to better prevent the risk of ink leakage, it is preferable that the volume of each of the separated ink tanks closest to the writing element is the smallest and increases step by step. Big. It is assumed that the volume of the ink tank VI6 closest to the writing element is VI, and the other two ink tanks are VII and VIII in order, and the relationship of the three ink tanks is: VI ⁇ VII ⁇ VIII.
  • One end of the overflow tank and the fiber relay core must be in close contact with zero clearance fit or interference fit, and the other end needs to communicate with the gas-liquid exchange tank, thereby functioning as a connection and a bond between the two.
  • the gas-liquid balancer 5 can be formed by using an injection molding process using various plastic polymer materials such as ABS, PP, PE, PMMA, PA66 and the like.
  • the overflow groove width B of the gas-liquid balancer 5 is the exchange groove width A.
  • the position of the overflow tank is shown in Figure 5, Figure 6, and Figure 7.
  • the width of the overflow trough generally needs to be less than or equal to the width of the gas-liquid exchange tank.
  • the gas-liquid balancer 5 is spaced apart from the inner circumferential surface of the writing element end by an interference fit of the step limit.
  • the outer circumference of the gas-liquid balancer 5 needs to have an interference fit with the pen body, ensuring that the outer circumferential surface away from the end of the writing element is in a sealed state except for the gas-liquid exchange groove communicating with the ink tank, and the axial direction needs to be limited. To prevent swaying, see Figure 6. Make sure that gas-liquid exchange occurs in the gas-liquid exchange tank.
  • a plurality of circumferential slots are formed on the outer circumference of the gas-liquid balancer of FIGS. 5, 6, and 7 to form an ink buffer tank, and the buffer tank communicates with the gas-liquid exchange tank, and the axial direction of the slit
  • the width gap C is 0.05 mm to 0.50 mm.
  • the gas-liquid balancer forms a capillary action system, so the gas-liquid balancer can also function as an ink absorbing body, so the gas-liquid balancer can be optimally selected. As an ink absorbing body.
  • the ink caused by the internal air pressure or the internal temperature rises, it enters the gas-liquid balancer to achieve the buffering effect.
  • the outer circumference of the liquid balancer is provided with a plurality of ink buffer grooves formed by the circumferential slits.
  • the ink adsorbing body 2 adopts a multi-voided fiber cotton core ink-storing structure to adsorb ink, which can be formed by winding various fibers such as polyester fiber, polypropylene fiber, nylon fiber, etc., and the gap between the fibers can generate capillary.
  • the force realizes the function of storing ink.
  • the ink cartridge volume separated by a plurality of independent gas-liquid balancers 5, along the writing element end to the farthest end, wherein two adjacent ink tanks, the far-end ink tank volume is not less than the proximal ink tank volume.
  • the gas-liquid balancer axis from the farthest end of the writing element is provided with an axial limiting step of the fiber water guiding core, and the groove circumference uses the slit groove to realize the contact of the ink in the ink tank with the water guiding core.
  • the external environment communicates with the exchange channel of the gas-liquid balancer through the inner wall air passage of the pen from the end of the writing element.
  • the air can be replenished into the exchange tank of the gas-liquid balancer in time to ensure the smooth realization of gas-liquid exchange.
  • the external environment communicates with the exchange channel of the gas-liquid balancer through the inner wall air passage of the pen from the end of the writing element, as shown in FIG.
  • the batch assembly process that can be implemented is as follows: the gas-liquid balancer is assembled one by one in the pen body; after the assembly is in place, the filling needle with a diameter smaller than the diameter of the fiber core is used for injection filling, and is filled during the filling process. The position of the needle is moved up step by step, and different ink tanks are filled. After the filling is completed, the fiber water guiding core, the ink absorbing body, the writing component are assembled, and the sealing cap is fastened to form the final product.
  • Gas-liquid balancer 5 gas-liquid exchange tank width selection technical solution as follows:
  • the gas-liquid balancer 5 is made of a hydrophilic material having a good ABS material and subjected to a chemical surface treatment to improve hydrophilicity.
  • the gas-liquid balancer overflow tank width is selected to be the same width as the gas-liquid balance tank.
  • test plan immerse one end of the different exchange tank width gas-liquid balancer that has been subjected to the same chemical surface treatment vertically into the ink to test the climb speed of the gas-liquid balancer of different widths under the same ink tension. details as follows:
  • the ink tank capacity is as follows.
  • the nearest ink tank filling volume is 0.5g, and the near-end ink tank filling is selected.
  • the loading capacity is 1.5g, and the filling capacity of the farthest ink tank is 2g.
  • the gas-liquid balancer and other components with different exchange slots are assembled with different pen bodies to perform the following tests:
  • the flat temperature Based on the constant temperature and humidity chamber, the flat temperature, the pen head is up, the pen head is facing down, and the cap is pressed for 3 months to test the leak resistance.
  • the test temperature is 40 degrees and the relative humidity is 40-70%.
  • the test result is:
  • the ink absorbing body is realized by the design of the same structure of the gas-liquid balancer. As shown in FIG. 15, it includes: a pen body 4 for accommodating ink and a main body forming a writing instrument; a writing element 1 mounted on the pen body head; and an ink absorbing body 2 mounted at a rear end of the writing element; a fiber water guiding core 3, which is installed in the pen body, runs through the ink absorbing body, the front end is in contact with the writing element, and the rear end is in communication with the ink tank formed by the inner body cavity of the pen; and is characterized in that the pen body is along the body thereof At least one gas-liquid balancer 5 is disposed in the axial direction, and the gas-liquid balancer 5 is installed in the annular gap formed by the fiber water-conducting core and the pen body, and the structure of the gas-liquid balancer is set as shown in FIG.
  • a lateral overflow tank is provided in the middle of the interior of the gas-liquid balancer, and the overflow tank is connected to two longitudinally disposed gas-liquid exchange tanks, two The gas-liquid exchange tanks are then in communication with a plurality of circumferential slits provided on the outer surface of the gas-liquid balancer to form an ink buffer tank.
  • One end of the overflow tank 10 is in contact with the fiber water guiding core, and the other end is in communication with the gas-liquid exchange tank 9; the outer circumferential surface of the fiber water guiding core and the inner wall of the gas-liquid balancer are provided with no gap fit or Interference fit.
  • FIG. 13 the direction of ink flow in the gas-liquid balancer is shown in FIG. 13 and FIG.
  • the gas-liquid balancer forms a capillary action system, so the gas-liquid balancer can also function as an ink absorbing body, so the gas-liquid balancer can be optimally selected. As an ink absorbing body.
  • the ink absorbing body 13 adsorbs ink using a multi-voided fiber wick storage structure.
  • the ink absorbing body can be formed by winding various fibers such as polyester fiber, polypropylene fiber, and nylon fiber, and the gap between the fibers can generate a capillary force to realize the function of storing the ink.
  • the ink cartridge volume separated by a plurality of independent gas-liquid balancers, along the writing element end to the farthest end, wherein two adjacent ink tanks, the far-end ink tank volume is not less than the proximal ink tank volume .
  • the volume of each of the separated ink tanks closest to the writing element is the smallest and gradually increases. .
  • the volume of the ink tank closest to the writing element is V1, and the other positions are sequentially V2 and V3, where V1 ⁇ V2 ⁇ V3.
  • the gas-liquid balancer axis from the farthest end of the writing element is provided with an axial limit step 14 of the fiber core, and the step circumference 15 is used to effect contact of the ink in the ink tank with the water core. See Figure 16 and Figure 17 for details.
  • the air can be replenished into the exchange tank of the gas-liquid balancer in time to ensure the smooth realization of gas-liquid exchange.
  • the gas-liquid balancer uses a PP material with good chemical resistance and chemical surface treatment to improve hydrophilicity.
  • a gas-liquid balancer with two gas-liquid exchange tanks, two corresponding overflow tanks and a plurality of ink buffer tanks on the outer circumference is selected, wherein the overflow tank width is selected and the gas-liquid balance tank is selected.
  • the same width, each ink buffer groove width is 0.20mm.
  • test plan immerse one end of the different exchange tank width gas-liquid balancer that has been subjected to the same chemical surface treatment vertically into the ink to test the climb speed of the gas-liquid balancer of different widths under the same ink tension. details as follows:
  • the ink tank capacity is as follows.
  • the nearest ink tank filling volume is 0.5g, and the near-end ink tank filling is selected.
  • the capacity is 1g, and the most remote ink tank management is 1.5g.
  • the gas-liquid balancer and other components of the two exchange groove widths are respectively assembled with different pen bodies to perform the following tests:
  • the flat temperature Based on the constant temperature and humidity chamber, the flat temperature, the pen head is up, the pen head is facing down, and the cap is pressed for 3 months to test the leak resistance.
  • the test temperature is 40 degrees and the relative humidity is 40-70%.
  • the test result is:
  • a gas-liquid balancer having the same gas-liquid exchange tank width is selected as the ink adsorbing body.
  • Embodiment 3 Refer specifically to FIG.
  • the end fixing manner of the fiber water guiding core and the structure of the pen body are changed, the pen body 4 is a split structure in which the ink bag is inserted together, and the end of the fiber water guiding core is fixed by a separate ink bag fixing column. After the ink bag is mounted on the fixed column, the ink tank is formed; the rest of the structure is the same as that of the second embodiment; of course, the gas-liquid balancer in the structure can also select the structure shown in FIG. 5, FIG. 6, and FIG.
  • two gas-liquid balancers are used for stepwise buffering, and the front-end ink adsorbing body 13 uses a similar design of a gas-liquid balancer, and an annular groove is provided thereon.

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Abstract

一种直液式书写工具，包括：笔体（4）、书写元件（1）、墨水吸附体（2, 13）和纤维引水芯（3），在笔体（4）内沿其轴线方向设有至少一个气液平衡器（5），气液平衡器（5）安装在纤维引水芯（3）与笔体（4）形成的环状间隙内，在气液平衡器（5）的外圆周面上设置有一个或者多个贯穿其外圆周面且对墨水有毛细吸引力作用的气液交换槽（9），在气液平衡器（5）的径向面上设有溢流槽（10），溢流槽（10）的一端与纤维引水芯（3）接触，另一端与气液交换槽（9）连通；纤维引水芯（3）外圆周面与气液平衡器（5）内孔壁采用无间隙配合或过盈配合。

Description

一种直液式书写工具 技术领域
本发明涉及一种直液式书写工具，所述直液式书写工具，是指墨水以液态形式直接存储于笔体中的书写工具，可用于文教用品、医用或工业等领域，通过容纳各类液体，且通过一定的出液装置实现出液的书写、标记、涂覆装置。
背景技术
记号笔作为书写工具的一种，尤其是采用各种溶剂类的低表面张力墨水的记号笔，是广泛应用的涂覆书写工具，由于墨水表面张力低，容易出现漏墨等问题，所以记号笔主要采用的是纤维制成的棉芯储墨结构，但棉芯储墨结构会有墨水残余，而且书写过程中耗墨量会不断的下降，书写过程的稳定性不够。
为了解决以上问题，专利CN01809151.2公开了一种书写工具，通过多个壁分隔的墨仓来直接储存墨水，其每个隔层壁都具有一种在毛细管力的作用下可保持住墨的连通孔，并通过供墨件与壁之间的间隙实现气液交换。
以上专利虽然可以解决一部分棉芯式书写工具的问题，但由于供墨件与壁之间的间隙实际充满了墨水，在书写过程中，由于墨仓中的墨水不断吸收到供墨件中，同时间隙中的墨水也存在两种可能，吸收到供墨件中或保留在间隙中，其变化无法精确的控制，且实际制造过程中间隙稍有公差，气液交换就会受到影响，而且受墨水本身的理化指标影响较大，批量产品的一致性不易保证。
另外，专利CN200480043409.6公开了一种液体供应装置，通过间隔壁伸出部高于贮存在前述液体贮存室内的液体的液面的方式存储墨水，并优化的在供墨体尾部放置墨水吸收体，用于提供书写过程中所需的墨水。
以上专利由于间隔壁高于存储室墨水的液面，墨水不容易出现漏墨的问题，但产品必须平放和倒放，墨水才能够浸润供墨体或尾部的墨水吸收体。因此在使用便利性方面存在较大缺陷。
专利CN201310398639.5公开了一种直液式书写工具，通过在分隔壁上设有连通所述墨水管和储存管的导气装置和导墨装置来实现气液交换，提供了两种方案，第一方案是与专利CN01809151.2类似的与导墨件之间的间隙方案，另一种就是通过独立的导气孔实现。
以上专利中的第一方案，同样存在间隙中的墨水也存在两种可能，吸收到供墨件中或 保留在间隙中，其变化无法精确的控制的问题，第二方案的问题也较为明显，由于导气孔独立于供墨件，二者之间无直接联系，容易造成书写端与进气端的不平衡。
专利CN201510887830.5公开了一种直液式隔水器，通过设有至少一条凹槽所述多个隔水层设置于所述外圆壁与所述底圆壁之间形成的储墨结构将墨水层层分隔。其原理是将墨水分隔在不同的仓里，实现按墨仓顺序出墨，并提高抗漏墨特性。
以上专利同样采用供墨件与隔水器的间隙换气，墨仓供墨和换气均通过同一个凹槽实现，由于无法做到相对独立的通道，因此换气过程非常复杂，不易控制。另外该专利存在实际无法批量生产的问题，原因是隔水器在墨仓中所占据的体积较大，如果先灌装墨水后放置隔水器容易造成墨水溢出和墨仓内气压升高的问题，反之，如果先放置隔水器，后灌装，则因为进入各隔层的通道较小，灌装时间过长的问题，因此实际上并不能实现批量生产。
专利US6659671公开了一种液体书写工具，同样是通过供墨件与分隔壁之间的间隙实现气液交换，导致了该过程不易受控的问题。
专利CN200810097132.5公开了一种直液式笔具，通过两个独立的导气导液管实现书写过程的供墨控制，由于两个导气导液管独立调节空气进入，因此存在着二者在使用过程中的平衡问题。
综上，现有的各类直液式书写工具，虽然能够解决部分现存棉芯式书写工具的缺点，由于以上技术方案有的采用独立与供墨件的导气通道，有的采用与供墨件之间的各种形状的间隙实现气液交换，因此均未能做到精确的控制墨水和气压之间的平衡，使得系统在书写过程中发生各种复杂的、不确定的变化，导致系统的不稳定和对墨水适应性不够。
发明内容
本发明提供一种直液式书写工具，通过设置多个气液平衡器，实现在书写过程中墨水与空气变化的精确调节，并在书写过程中通过溢流槽的作用，不断实现墨水与气压之间的动态平衡，从而既能够保证流畅稳定的书写，又能够确保书写和存储过程中不易出现漏墨的问题。
本发明采用的具体实施方案如下：
一种直液式书写工具，包括：
笔体，其用于容纳墨水和形成书写工具的主体；
书写元件，安装在笔体头部；
墨水吸附体，其安装在书写元件的后端；
纤维引水芯，其安装在笔体内，贯穿于所述的墨水吸附体，前端与书写元件接触，后端与笔体内腔形成的墨仓连通；其特征在于，
在所述的笔体内沿其轴线方向设有至少一个气液平衡器，所述的气液平衡器安装在所述的纤维引水芯与笔体之间，在所述的气液平衡器的外圆周面上设置有一个或者多个贯穿其外圆周面且对墨水有毛细吸引力作用的气液交换槽；在所述的气液平衡器的径向面上设有溢流槽，所述的溢流槽的一端与与纤维引水芯接触，另一端与所述的气液交换槽连通；所述的纤维引水芯外圆周面与气液平衡器内孔壁采用无间隙配合或过盈配合。
由于记号笔墨水一般表面张力低，容易出现漏墨的风险，因此当温度升高或内部压力增大时，过多的墨水沿纤维引水芯向书写元件端流动，纤维中继芯处于过饱和的状态，当流动到气液平衡器溢流槽的位置时，由于纤维中继芯与溢流槽紧密接触，从饱和区到非饱和区具有毛细吸引力的作用，因此过饱和的墨水会从溢流槽流入气液平衡器中，从而实现了缓冲作用。
当书写过程中，随着纤维中继芯中吸收的墨水不断消耗，墨仓中的空气体积不断增加，此时外界气压会有大于内部墨仓气压的趋势，特别是快速书写时，书写过程的墨水消耗量大于纤维中继芯从墨仓中吸收墨水的速度，纤维中继芯出现欠饱和的现象，，由于纤维中继芯与溢流槽紧密接触，从饱和区到非饱和区具有毛细吸引力的作用，此时墨水从气液平衡器溢流槽运动到纤维中继芯上，同步的，气液交换槽中的墨水减少出现间隙，空气从外界沿气液交换槽补充到墨仓中，实现新的书写和消耗的平衡。
根据不同的墨水灌装量要求，可以设置多个气液平衡器，同步的，气液平衡器上也可以设置多个气液交换槽，作为必要条件，每个气液交换槽必须通过溢流槽与中继芯相通，才可以确保平衡作用的实现。
溢流槽一端与纤维中继芯必须通过零间隙配合或过盈配合实现紧密接触，另一端需要与气液交换槽相连通，从而起到二者的连通和纽带作用。
作为优选的，所述的气液平衡器可以采用各种可塑性高分子材料通过注塑过程形成，高分子塑胶材料例如ABS、PP、PE、PMMA、PA66等材料。
作为优选的，气液平衡器的气液交换槽宽度A为0.05mm-0.40mm。
根据墨水的表面张力和墨仓内压力分布情况，可以通过拉普拉斯液体表面张力方程对气液平衡器的交换槽宽度进行计算，确保墨水和空气在气液交换槽中在产生足够毛细作用力的条件下进行流动和交换。经过计算和实际的不同墨水测试优化，优选交换槽宽度A为0.05mm-0.40mm。
作为优选的，气液平衡器的溢流槽宽度B≦气液交换槽宽度A。
由于溢流槽起到平衡的作用，因此溢流槽的宽度一般需要小于或等于气液交换槽的宽度。
作为优选的，气液平衡器远离书写元件端的外圆周面与笔体内表面采用台阶限位的过盈配合。
气液平衡器的外圆周需要和笔体采用过盈配合，确保除了气液交换槽与墨仓相通外，其余的远离书写元件端的外圆周面均处于密封状态，且轴向需要限位，防止窜动。确保气液交换是发生在气液交换槽中。
作为优选的，气液平衡器外圆周可以通过多个圆周缝槽形成墨水缓冲槽，缓冲槽与气液交换槽相通，缝槽的轴向宽度间隙C为0.05mm～0.50mm。
当内部气压或内部温度升高导致的墨水溢流时，进入到气液平衡器中，实现缓冲作用，为了加强这种缓冲作用，确保更多的墨水可以容纳到气液平衡器中，沿气液平衡器外圆周设置多个圆周缝槽形成的墨水缓冲槽，当气液交换槽无法容纳更多的墨水时，墨水进入到墨水缓冲槽中存储。如果书写过程中需要更多的墨水消耗，这些存储在墨水缓冲槽的墨水又会逐级进入到气液交换槽、溢流槽中，最终进入到纤维引水芯用于书写。同样根据拉普拉斯液体表面张力方程进行计算和实际的不同墨水测试优化，缝槽的间隙轴向宽度C为0.05mm～0.50mm。
作为优选的，所述的溢流槽设置在所述的气液平衡器的端面上或者气液平衡器中间部位，并贯穿内孔壁。
在设置了交换槽、溢流槽、圆周缝槽后，气液平衡器形成了毛细作用系统，因此气液平衡器同样可以起到墨水吸附体的作用，因此可以优化的选择采用气液平衡器作为墨水吸附体。
作为优选的，墨水吸附体采用多空隙纤维棉芯储墨结构吸附墨水。墨水吸附体可以采用聚酯纤维、聚丙烯纤维、尼龙纤维等各种纤维缠绕集束而成，其纤维之间的间隙可以产生毛细作用力实现存储墨水的功能。
作为优选的，当所述的气液平衡器设置有多个时，被多个独立的气液平衡器分隔的墨仓体积，其中相邻的两个墨仓的体积关系是：
沿书写元件端至最远端，远端的墨仓体积大于等于近端的墨仓体积。
由于多个气液平衡器可以逐级缓冲溢出的多余墨水，为了更好的防止漏墨的风险，因此优选分隔的各墨仓体积中距离书写元件最近的墨仓体积最小，并逐级增大。
作为优选的，距离书写元件最远端的气液平衡器轴线设置纤维引水芯的轴向限位台阶，且台阶圆周采用缝槽实现墨仓中的墨水与引水芯的接触。
作为优选的，外界环境通过从书写元件端起始的笔体内壁空气通道与气液平衡器的交换槽相连通。
通过空气通道，空气可以及时补充到气液平衡器的交换槽中，从而确保气液交换的顺利实现。
通过以上技术方案，可实施的批量组装过程如下：在笔体中逐个装配气液平衡器；装配到位后采用直径小于纤维引水芯直径的灌装针注射灌装，并在灌装过程中灌装针的位置逐级上移，灌装不同墨仓，完成灌装后装配纤维引水芯、墨水吸附体、书写元件，扣上密封帽，形成最终的产品。
本发明的有益效果：
本发明确既保证了设置在气液平衡器外圆周的导气通气结构的相对独立性，又能够通过溢流槽实现与纤维引水芯之间的墨水交换，确保了相互之间的平衡。并通过气液平衡器不同功能区的设置，改善了书写过程和外界环境变化过程中的气液交换的微观不稳定状况。
本发明可以根据不同的墨水表面张力和粘度情况，在气液设置不同宽度尺寸的气液交换槽和墨水缓冲槽、溢流槽，通过宽度尺寸变化就可以适应和控制多种墨水的平衡和出墨，为大批量生产的可实现性创造了有利条件。
本发明可以用于各类低粘度墨水的书写工具，例如水性圆珠笔、永久性记号笔、白板笔、工业记号笔、医用记号笔等产品，同时由于其稳定的特性，也可以进一步延伸到各种涂覆工具，例如彩妆类涂覆工具及绘画用的画材等。
附图说明
构成本申请的一部分的说明书附图用来提供对本申请的进一步理解，本申请的示意性实施例及其说明用于解释本申请，并不构成对本申请的限定。
图1为本发明的实施例1；
图2为本发明气液平衡器与纤维引水芯配合局部图；
图3为本发明温度升高或内部压力增大时，墨水在气液平衡器中运动的示意图；
图4为本发明书写过程中，墨水在气液平衡器中运动的示意图
图5、图6、图7为本发明气液平衡器截面图和立体图；
图8为本发明气液平衡器与笔体配合截面图；
图9、图10、图11、图12为本发明增加墨水缓冲槽的气液平衡器截面图和立体图；
图13为本发明温度升高或内部压力增大时，墨水在增加墨水缓冲槽的气液平衡器中运动的示意图；
图14为本发明书写过程中，墨水在增加墨水缓冲槽的气液平衡器中运动的示意图；
图15为本发明的实施例2；
图16、图17为本发明纤维引水芯尾部与气液平衡器配合的截面图。
图18为本发明笔体内部空气通道示意图。
图19为本发明的实施例3。
图中：1书写元件，2墨水吸附体，3纤维引水芯，4笔体，5气液平衡器，6墨仓VI，7墨仓VII,8墨仓VIII，9气液交换槽，10溢流槽，11墨水缓冲槽，12气液交换槽，13墨水吸附体，14限位台阶，15缝槽，16空气通道。
具体实施方式
应该指出，以下详细说明都是例示性的，旨在对本申请提供进一步的说明。除非另有指明，本文使用的所有技术和科学术语具有与本申请所属技术领域的普通技术人员通常理解的相同含义。
需要注意的是，这里所使用的术语仅是为了描述具体实施方式，而非意图限制根据本申请的示例性实施方式。如在这里所使用的，除非上下文另外明确指出，否则单数形式也意图包括复数形式，此外，还应当理解的是，当在本说明书中使用术语“包含”和/或“包括”时，其指明存在特征、步骤、操作、器件、组件和/或它们的组合。
下面结合实施例图对本发明进行详细说明：
实施例1：
具体参照图1。一种水性记号笔，其墨水表面张力为30～35mN/m，灌装量为3.5g，用于书写标记绘画用。墨水吸附体选用聚酯纤维棉，气孔率为80％左右，具体结构如下：
其包括：笔体4，其用于容纳墨水和形成书写工具的主体；书写元件1，安装在笔体头部；墨水吸附体2，其安装在书写元件的后端；纤维引水芯3，其安装在笔体内，贯穿于所述的墨水吸附体，前端与书写元件接触，后端与笔体内腔形成的墨仓连通；其特征在于，在所述的笔体内沿其轴线方向设有至少一个气液平衡器5，所述的气液平衡器5安装在所述的纤维引水芯与笔体形成的环状间隙内，在所述的气液平衡器5的外圆周面上设置有一个或者多个贯穿其外圆周面且对墨水有毛细吸引力作用的气液交换槽9；在所述的气液平衡器的径向端面上设有溢流槽10，所述的溢流槽10的一端与纤维引水芯接触，另一端与 所述的气液交换槽9连通；所述的纤维引水芯外圆周面与气液平衡器内孔壁采用无间隙配合或过盈配合。
由于记号笔墨水一般表面张力低，容易出现漏墨的风险，因此当温度升高或内部压力增大时，过多的墨水沿纤维引水芯向书写元件端流动，纤维中继芯处于过饱和的状态，当流动到气液平衡器溢流槽的位置时，由于纤维中继芯与溢流槽紧密接触，从饱和区到非饱和区具有毛细吸引力的作用，因此过饱和的墨水会从溢流槽流入气液平衡器中，从而实现了缓冲作用。墨水的流动方向详见图3。
当书写过程中，随着纤维中继芯中吸收的墨水不断消耗，墨仓中的空气体积不断增加，此时外界气压会有大于内部墨仓气压的趋势，特别是快速书写时，书写过程的墨水消耗量大于纤维中继芯从墨仓中吸收墨水的速度，纤维中继芯出现欠饱和的现象，，由于纤维中继芯与溢流槽紧密接触，从饱和区到非饱和区具有毛细吸引力的作用，此时墨水从气液平衡器溢流槽运动到纤维中继芯上，同步的，气液交换槽中的墨水减少出现间隙，空气从外界沿气液交换槽补充到墨仓中，实现新的书写和消耗的平衡。墨水流动方向详见图4。
根据不同的墨水灌装量要求，可以设置多个气液平衡器5，同步的，气液平衡器5上也可以设置多个气液交换槽，作为必要条件，每个气液交换槽必须通过溢流槽与中继芯相通，才可以确保平衡作用的实现。
在图1中设置了三个气液平衡器5，三个气液平衡器5将笔体内部分成了三个墨仓，分别是墨仓VI6、墨仓VII7、墨仓VIII8。由于3个气液平衡器5可以逐级缓冲溢出的多余墨水，为了更好的防止漏墨的风险，因此优选分隔的各墨仓体积中距离书写元件最近的墨仓体积最小，并逐级增大。设距离书写元件最近的墨仓VI6的体积为VI，并其他两个墨仓依次为VII、VIII，则三个墨仓的关系是：VI≦VII≦VIII。
溢流槽一端与纤维中继芯必须通过零间隙配合或过盈配合实现紧密接触，另一端需要与气液交换槽相连通，从而起到二者的连通和纽带作用。
作为优选的，所述的气液平衡器5可以采用各种可塑性高分子材料通过注塑过程形成，高分子塑胶材料例如ABS、PP、PE、PMMA、PA66等材料。
作为优选，气液平衡器5的溢流槽宽度B≦交换槽宽度A。溢流槽位置详见图5、图6、图7。
由于溢流槽起到平衡的作用，因此溢流槽的宽度一般需要小于或等于气液交换槽的宽度。
作为优选，气液平衡器5远离书写元件端的外圆周面与笔体内表面采用台阶限位的过盈 配合。
气液平衡器5的外圆周需要和笔体采用过盈配合，确保除了气液交换槽与墨仓相通外，其余的远离书写元件端的外圆周面均处于密封状态，且轴向需要限位，防止窜动，详见图6。确保气液交换是发生在气液交换槽中。
进一步的，作为优选，可以在图5、6、7的气液平衡器外圆周上设置多个圆周缝槽形成墨水缓冲槽，缓冲槽与所述的气液交换槽相通，缝槽的轴向宽度间隙C为0.05mm～0.50mm。
在设置了交换槽、溢流槽、圆周缝槽后，气液平衡器形成了毛细作用系统，因此气液平衡器同样可以起到墨水吸附体的作用，因此可以优化的选择采用气液平衡器作为墨水吸附体。
当内部气压或内部温度升高导致的墨水溢流时，进入到气液平衡器中，实现缓冲作用，为了加强这种缓冲作用，确保更多的墨水可以容纳到气液平衡器中，沿气液平衡器外圆周设置多个圆周缝槽形成的墨水缓冲槽，当气液交换槽无法容纳更多的墨水时，墨水进入到墨水缓冲槽中存储。如果书写过程中需要更多的墨水消耗，这些存储在墨水缓冲槽的墨水又会逐级进入到气液交换槽、溢流槽中，最终进入到纤维引水芯用于书写。同样根据拉普拉斯液体表面张力方程进行计算和实际的不同墨水测试优化，缝槽的间隙轴向宽度C为0.05mm-0.50mm。
作为优选，墨水吸附体2采用多空隙纤维棉芯储墨结构吸附墨水，其可以采用聚酯纤维、聚丙烯纤维、尼龙纤维等各种纤维缠绕集束而成，其纤维之间的间隙可以产生毛细作用力实现存储墨水的功能。
作为优选，采用多个独立的气液平衡器5分隔的墨仓体积,沿书写元件端至最远端，其中相邻的两个墨仓，远端的墨仓体积不小于近端的墨仓体积。
作为优选，距离书写元件最远端的气液平衡器轴线设置纤维引水芯的轴向限位台阶，且台阶圆周采用缝槽实现墨仓中的墨水与引水芯的接触。
作为优选，外界环境通过从书写元件端起始的笔体内壁空气通道与气液平衡器的交换槽相连通。
通过空气通道，空气可以及时补充到气液平衡器的交换槽中，从而确保气液交换的顺利实现。
作为优选，外界环境通过从书写元件端起始的笔体内壁空气通道与气液平衡器的交换槽相连通，详见图18。
通过以上技术方案，可实施的批量组装过程如下：在笔体中逐个装配气液平衡器；装配到位后采用直径小于纤维引水芯直径的灌装针注射灌装，并在灌装过程中灌装针的位置逐级上移，灌装不同墨仓，完成灌装后装配纤维引水芯、墨水吸附体、书写元件，扣上密封帽，形成最终的产品。
气液平衡器5气液交换槽的宽度选择技术方案，具体如下：
气液平衡器5选用亲水性较好的ABS材料，并进行化学表面处理，提高亲水性。气液平衡器溢流槽宽度选择与气液平衡槽一样的宽度。
选择测试方案：将经过同样化学表面处理的不同交换槽宽度气液平衡器一端垂直浸入到墨水中，测试不同宽度气液平衡器在同样的墨水张力情况下的爬升速度。具体如下：
Figure PCTCN2018071970-appb-000001
根据以上测试结果选择槽宽为0.05和0.15mm的气液平衡器进行下一步设计。
根据灌装量的要求，选择使用三个气液平衡器将墨仓分为三个，墨仓容量分别如下，与书写元件距离最近端墨仓灌装量选择0.5g，次近端墨仓灌装量选择1.5g，最远端墨仓灌装量为2g。
采用不同笔体分别装配不同交换槽宽的气液平衡器和其他零部件进行如下测试：
书写测试：
基于100g书写压力、ISO14145书写纸张、书写角度为65度，书写速度为4.5m/min，采用书写划线机进行测试，用于对比测试两种情况下的书写状况，结果如下：
Figure PCTCN2018071970-appb-000002
Figure PCTCN2018071970-appb-000003
恒温测试：
基于恒温恒湿箱，分别采用平放、笔头朝上、笔头朝下，扣帽进行3个月的恒温测试，用于对比抗漏性状况，测试温度为40度，相对湿度为40-70％，测试结果为：
Figure PCTCN2018071970-appb-000004
综合以上测试结果和制造可行性，选择气液交换槽宽度为0.15mm的气液平衡器用于产品技术方案实施。
实施例2：具体参照图15。
一种酒精基的永久记号笔，其墨水表面张力为20～25mN/m，灌装量为3g，用于标记用。墨水吸附体采用气液平衡器同类结构的设计实现。如图15所示，其包括：笔体4，其用于容纳墨水和形成书写工具的主体；书写元件1，安装在笔体头部；墨水吸附体2，其安装在书写元件的后端；纤维引水芯3，其安装在笔体内，贯穿于所述的墨水吸附体，前端与书写元件接触，后端与笔体内腔形成的墨仓连通；其特征在于，在所述的笔体内沿其轴线方向设有至少一个气液平衡器5，所述的气液平衡器5安装在所述的纤维引水芯与笔体形成的环状间隙内，气液平衡器的结构设置成如图9、图10、图11、图12所示的结构，在气液平衡器的内部的中部设有一个横向的溢流槽，所述的溢流槽与两个纵向设置的气液交换槽连通，两个气液交换槽再与设置在气液平衡器外表面的多个圆周缝槽形成墨水缓冲槽连通。所述的溢流槽10的一端与纤维引水芯接触，另一端与所述的气液交换槽9连通；所述的纤维引水芯外圆周面与气液平衡器内孔壁采用无间隙配合或过盈配合。
具体的，气液平衡器中墨水流动的方向见图13、图14。
在设置了交换槽、溢流槽、圆周缝槽后，气液平衡器形成了毛细作用系统，因此气液平衡器同样可以起到墨水吸附体的作用，因此可以优化的选择采用气液平衡器作为墨水吸附体。
作为优选，墨水吸附体13采用多空隙纤维棉芯储墨结构吸附墨水。墨水吸附体可以采 用聚酯纤维、聚丙烯纤维、尼龙纤维等各种纤维缠绕集束而成，其纤维之间的间隙可以产生毛细作用力实现存储墨水的功能。
作为优选，采用多个独立的气液平衡器分隔的墨仓体积,沿书写元件端至最远端，其中相邻的两个墨仓，远端的墨仓体积不小于近端的墨仓体积。
由于多个气液平衡器可以逐级缓冲溢出的多余墨水，为了更好的防止漏墨的风险，因此优选分隔的各墨仓体积中距离书写元件最近的墨仓体积最小，并逐级增大。以附图15为例，设距离书写元件最近的墨仓体积为V1，并其他仓依次为V2、V3，其中V1≦V2≦V3。
作为优选，距离书写元件最远端的气液平衡器轴线设置纤维引水芯的轴向限位台阶14，且台阶圆周采用缝槽15实现墨仓中的墨水与引水芯的接触。详见图16、图17。
通过空气通道，空气可以及时补充到气液平衡器的交换槽中，从而确保气液交换的顺利实现。
其中需要额外说明的是气液平衡器气液交换槽的宽度选择技术方案，具体如下：
气液平衡器选用耐化学性较好的PP材料，并进行化学表面处理，提高亲水性。为提高墨水的缓冲能力，选择采用外圆周开有2个气液交换槽、相应的2个溢流槽及多个墨水缓冲槽的气液平衡器，其中溢流槽宽度选择与气液平衡槽一样的宽度，每个墨水缓冲槽宽度为0.20mm。
选择测试方案：将经过同样化学表面处理的不同交换槽宽度气液平衡器一端垂直浸入到墨水中，测试不同宽度气液平衡器在同样的墨水张力情况下的爬升速度。具体如下：
Figure PCTCN2018071970-appb-000005
Figure PCTCN2018071970-appb-000006
根据以上测试结果选择槽宽为0.05和0.10mm的气液平衡器进行下一步设计。
根据灌装量的要求，选择使用三个气液平衡器将墨仓分为三个，墨仓容量分别如下，与书写元件距离最近端墨仓灌装量选择0.5g，次近端墨仓灌装量选择1g，最远端墨仓管理量为1.5g。
采用不同笔体分别装配两种交换槽宽的气液平衡器和其他零部件进行如下测试：
书写测试：
基于100g书写压力、PE膜、书写角度为65度，书写速度为4.5m/min，采用书写划线机进行测试，用于对比测试两种情况下的书写状况，结果如下：
Figure PCTCN2018071970-appb-000007
恒温测试：
基于恒温恒湿箱，分别采用平放、笔头朝上、笔头朝下，扣帽进行3个月的恒温测试，用于对比抗漏性状况，测试温度为40度，相对湿度为40-70％，测试结果为：
Figure PCTCN2018071970-appb-000008
综合以上测试结果和制造可行性，选择气液交换槽宽度为0.10mm的气液平衡器用于产品技术方案实施。
同理选择相同气液交换槽宽度的气液平衡器作为墨水吸附体。
实施例3：具体参照图19。
一种换囊水性记号笔，其墨水表面张力为30～35mN/m，墨囊灌装量为2.5g，用于书写 标记绘画用。如图19所示，改变了纤维引水芯的末端固定方式以及笔体的结构，笔体4采用墨囊插装在一起的分体式结构；纤维引水芯的末端固定采用一个单独的墨囊固定柱，将墨囊装到固定柱上后，形成墨仓；其余的结构与实施例2相同；当然该结构中的气液平衡器也可以选择图5、图6、图7所示的结构。
该结构中是采用2个气液平衡器用于逐级缓冲，另外前端墨水吸附体13使用气液平衡器同类设计结构，在其上设置有环形槽。
上述虽然结合附图对本发明的具体实施方式进行了描述，但并非对本发明保护范围的限制，所属领域技术人员应该明白，在本发明的技术方案的基础上，本领域技术人员不需要付出创造性劳动即可做出的各种修改或变形仍在本发明的保护范围以内。

Claims (10)

  1. 一种直液式书写工具，包括：笔体，其用于容纳墨水和形成书写工具的主体；
    书写元件，安装在笔体前端；
    墨水吸附体，其安装在书写元件的后端；
    引水芯，其安装在笔体内，贯穿于所述的墨水吸附体，前端与书写元件接触，后端与笔体内腔形成的墨仓连通；其特征在于，
    在所述的笔体内沿其轴线方向设有至少一个气液平衡器，所述的气液平衡器安装在所述的纤维引水芯与笔体内壁之间，在所述的气液平衡器的外圆周面上设置有一个或者多个贯穿其外圆周面且对墨水有毛细吸引力作用的气液交换槽；在所述的气液平衡器的径向面上设有溢流槽，所述的溢流槽的一端与引水芯接触，另一端与所述的气液交换槽连通；所述的纤维引水芯外圆周面与气液平衡器内孔壁采用无间隙配合或过盈配合。
  2. 根据权利要求1所述的一种直液式书写工具，其特征在于：所述的气液平衡器的气液交换槽宽度A为0.05mm～0.40mm。
  3. 根据权利要求1所述的一种直液式书写工具，其特征在于：所述的气液平衡器的溢流槽宽度B≦气液交换槽宽度A。
  4. 根据权利要求1所述的一种直液式书写工具，其特征在于：所述的气液平衡器远离书写元件端的外圆周与笔体内表面采用台阶限位的过盈配合。
  5. 根据权利要求1所述的一种直液式书写工具，其特征在于：在所述的气液平衡器外圆周面上还设有通过多个圆周缝槽形成墨水缓冲槽，每个墨水缓冲槽均与气液交换槽相通。
  6. 根据权利要求1-5任一所述的一种直液式书写工具，其特征在于：所述的溢流槽设置在所述的气液平衡器的端面上或者气液平衡器中间部位，并贯穿内孔壁。
  7. 根据权利要求1所述的一种直液式书写工具，其特征在于：所述的墨水吸附体采用多空隙纤维棉芯储墨结构吸附墨水。
  8. 根据权利要求1所述的一种直液式书写工具，其特征在于：当所述的气液平衡器设置有多个时，被多个独立的气液平衡器分隔的墨仓体积，其中相邻的两个墨仓的体积关系是：沿书写元件端至最远端，远端的墨仓体积大于等于近端的墨仓体积。
  9. 根据权利要求1所述的一种直液式书写工具，其特征在于：距离书写元件最远端的气液平衡器轴线设置纤维引水芯的轴向限位台阶，且台阶圆周采用缝槽实现墨仓中的墨水与引水芯的接触。
  10. 根据权利要求1所述的一种直液式书写工具，其特征在于：外界环境通过从书写元 件端起始的笔体内壁空气通道与气液平衡器的气液交换槽相连通。
PCT/CN2018/071970 2017-05-12 2018-01-09 一种直液式书写工具 WO2018205669A1 (zh)

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ES18759540T ES2874657T3 (es) 2017-05-12 2018-01-09 Herramienta de escritura de tipo líquido directo

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EP3424746B1 (en) 2021-05-19
EP3424746A4 (en) 2019-06-05

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