CN218343145U - Anti-leakage water pen - Google Patents

Abstract

The utility model discloses a prevent water-based pen of leakage, including the pen-holder, the nib, the water-diversion core, the regulator, well festival cover, the brush, the pen cover, be provided with the stock solution chamber in the pen-holder, the sealed close-fitting of pen-holder cup joints on the back end of well festival cover, the pen cover lock is on the anterior segment of well festival cover, the regulator setting is in the regulator installation cavity of well festival cover, the water-diversion core sets up in the water-diversion core hole of regulator, the water-diversion core front end is connected with the brush rear end, the brush front end extends the nib, a serial communication port, regulator week body interval distribution has a plurality of manger plate blades, manger plate blade outer periphery and regulator installation intracavity wall sealing contact, be provided with the breach of ventilating on the manger plate blade, at least part ventilation gap dislocation arrangement forms the maze air current channel that communicates with the stock solution chamber, be provided with the air channel with maze air current channel and external intercommunication on the nib, avoid the ink in the stock solution chamber to flow outside the pen-holder along maze air current channel when making the inside and outside pressure equal.

Description

Anti-leakage water pen

Technical Field

The utility model relates to a water pen technical field, concretely relates to prevent water pen of leakage.

Background

The water-based pen is provided with the pen core capable of absorbing ink, one end of the pen core is connected with the hairbrush, so that ink is continuously provided for the hairbrush, the water-based pen can be used in the field of color cosmetics, can be used in the field of offices, such as a mark pen, a correction pen and the like, has very wide application, and is popular with consumers.

When the external air pressure of the pen holder is adjusted, a linear air duct is usually arranged between the middle joint sleeve and the adjuster, and the pen point is provided with an air channel for communicating the air duct with the outside, so that the inner cavity of the pen holder is kept consistent with the outside air pressure, and the ink is prevented from flowing out of the liquid storage cavity due to the uneven internal air pressure and the external air pressure. However, in actual use, ink in the inner cavity of the pen holder easily flows into the vent groove along the linear air duct and then flows out of the pen holder from the vent groove, which seriously affects the user experience of the water-based pen.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a prevent water based pen of leakage solves among the prior art water based pen and can't compromise the problem of antiseep and being convenient for change simultaneously.

The purpose of the utility model can be realized by the following technical scheme:

a leakage-proof water pen comprises a pen holder, a pen point, a water diversion core, an adjuster, a middle joint sleeve, a brush and a pen cover, wherein a liquid storage cavity is arranged in the pen holder, the pen holder is sleeved on the rear section of the middle joint sleeve in a sealing and tight fit mode, the pen cover is buckled on the front section of the middle joint sleeve, the adjuster is arranged in an adjuster mounting cavity of the middle joint sleeve, the water diversion core is arranged in a water diversion core hole of the adjuster, the front end of the water diversion core is connected with the rear end of the brush, the front end of the brush extends out of the pen point, a plurality of water retaining blades are distributed on the whole adjuster at intervals, the outer circumferential surfaces of the water retaining blades are in sealing contact with the inner wall of the adjuster mounting cavity, ventilation notches are arranged on the water retaining blades in a staggered mode, at least part of the ventilation notches are distributed to form a labyrinth air flow channel communicated with the liquid storage cavity, and a ventilation groove for communicating the labyrinth air flow channel with the outside is arranged on the pen head.

As a further aspect of the present invention: the ventilation notch is a U-shaped opening and is positioned on the outer circumferential surface of the water retaining blade.

As a further aspect of the present invention: the ventilation notches in the middle of the labyrinth airflow channel and at least part of the ventilation notches at two ends of the middle of the labyrinth airflow channel are arranged in a staggered mode.

As a further aspect of the present invention: and a liquid storage groove is formed between the adjacent water retaining blades, and a liquid through hole for communicating the liquid storage groove with the water diversion core hole is formed in the circumferential wall of the regulator.

As a further aspect of the present invention: and liquid storage grooves are formed between the adjacent water retaining blades, and each water retaining blade is provided with a flow-through seam communicated with the adjacent liquid storage grooves.

As a further aspect of the present invention: the brush is characterized in that a water diversion core mounting hole which extends to the inside of the brush along the axial direction is formed in the rear end face of the brush, and the front end of the water diversion core is inserted in the water diversion core mounting hole.

As a further aspect of the present invention: an inner cover is arranged in the pen cap, the inner cover is provided with a bottom straight section and a main body section from the closed end to the open end of the pen cap, and the inner wall of the bottom straight section is a cylindrical wall; the main part section includes rear end interconnect and integrated into one piece's inner circle and outer lane, the inner circle with the contained angle has between the outer lane, being close to of inner circle the one end of blind end with the one end of the straight section of bottom is connected, the inner wall of inner circle is the aperture orientation the tapered wall of the straight section convergent of bottom, the outer wall of outer lane is the cylinder wall just the outer wall of outer lane with the inner wall sealing contact of pen cap.

The utility model has the advantages that: this application sets up the breach of ventilating through keeping off on the water vane, makes at least part breach of ventilating dislocation arrange and form maze air current passageway, and the ink that avoids in the stock solution chamber flows outside the pen-holder along maze air current passageway when realizing in the maze air current passageway that the pressure equals inside and outside the pen-holder.

Drawings

The present invention will be further described with reference to the accompanying drawings.

FIG. 1 is an exploded view of the overall structure of the present invention;

FIG. 2 is a planar view of the whole structure of the present invention;

FIG. 3 is a schematic structural view of the middle sleeve of the present invention;

FIG. 4 is a schematic view of the regulator of the present invention;

FIG. 5 is a schematic structural view of the water diversion core of the present invention;

FIG. 6 is a schematic view of the structure of the brush of the present invention;

FIG. 7 is a schematic structural view of the pen head of the present invention;

FIG. 8 is a partial schematic structural view of the present invention;

FIG. 9 is a sectional view of a part of the structure of the present invention;

FIG. 10 is a schematic view of the structure at A in FIG. 2;

fig. 11 is a schematic diagram of the structure at B in fig. 2.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-2, the present invention relates to a leakproof water pen, which comprises a pen holder 100, a pen point 200, a wick 400, an adjuster 500, a middle joint sleeve 600, a brush 700, a cap 800 and an inner cap 810. The pen holder 100, the pen point 200, the adjuster 500, the middle joint sleeve 600, the pen cap 800 and the inner cover 810 are all plastic parts.

Referring to fig. 2-3, a liquid storage chamber 300 for storing ink is disposed in the pen shaft 100, and a circle of convex ring 610 is disposed on the outer circumferential surface of the middle sleeve 600 to divide the middle sleeve 600 into a rear section 620 and a front section 630. The rear section 620 is inserted into the inner cavity of the barrel 100 with a tight sealing fit along the front port of the barrel 100. The rear section 620 is subdivided into four sequentially joined tubular segments, the segment at the rear end of the rear section 620 being in abutting contact with the reservoir 300. The outer diameters of the four segments are sequentially increased from back to front to form a step shape, and at the moment, the inner cavity of the pen holder 100 is provided with a step-shaped butt joint part matched with the four segments, so that the outer circumferential surfaces of the four segments are in close contact with the wall of the inner cavity of the pen holder 100, and the outer circumferential surface of the rear segment 620 is sealed with the wall of the inner cavity of the pen holder 100. Further, in order to ensure that the pen holder 100 cannot fall off from the middle joint sleeve 600, first annular protrusions 640 are respectively arranged on the outer circumferential surfaces of the segments positioned at the rear end of the rear segment 620 and the segments spaced by one segment, a first annular recess 110 matched with the first annular protrusion 640 is formed in the inner cavity wall of the pen holder 100, and the first annular protrusion 640 on the rear segment 620 is clamped in the first annular recess 110 in the inner cavity wall of the pen holder 100, so that the pen holder 100 is fixedly connected with the middle joint sleeve 600 in a sealing manner.

Referring to fig. 4-10, the inside of the middle sleeve 600 is provided with an adjuster mounting cavity 230 penetrating through the front and rear ends thereof, the adjuster 500 is inserted into the adjuster mounting cavity 230, and the rear end surface of the adjuster 500 is flush with the rear end surface of the middle sleeve 600. The front end of the regulator 500 extends from the front port of the regulator mounting cavity 230. Specifically, a ring of convex rings 520 are disposed on the outer circumferential surface of the adjustor 500 to divide the adjustor 500 into a front tube 530 and a rear tube 540, and the front tube 530 partially extends out of the adjustor mounting cavity 230 and is inserted into the inner cavity of the pen head 200. The outer diameter of the front pipe section 530 is smaller than the inner diameter of the regulator mounting cavity 230, so that a mounting gap 660 is formed between the front pipe section 530 and the regulator mounting cavity 230, a plurality of water-retaining blades 550 are axially distributed around the rear pipe section 540 at intervals, a liquid storage groove 560 is formed between adjacent water-retaining blades 550, and the outer circumferential surface of each water-retaining blade 550 is in close contact with the inner cavity wall of the regulator mounting cavity 230, so as to intercept ink flowing out of the liquid storage cavity 300 and prevent the ink from permeating out of the inner cavity of the pen holder 100.

The regulator 500 has a water wick hole 511 formed therethrough. The water diversion core 400 is made of fiber materials and is inserted in the water diversion core hole 511, the water diversion core 400 is provided with a straight rod section 410 and a conical front end head 420 positioned at the front end of the straight rod section 241, the rear end of the straight rod section 410 is positioned at the orifice of the liquid storage cavity 300, and the conical front end head 420 extends out of the water diversion core hole 511 to be inserted with the tail end of the brush 700.

In this embodiment, the diversion core hole 511 is a stepped hole with a fine hole 512 at the front section and a coarse hole 513 at the rear section, the straight rod section 410 penetrates through the fine hole 512 and the rear section 620, the straight rod section 410 and the fine hole 512 are in interference fit, and the diameter of the coarse hole 513 is larger than that of the straight rod section 410, so that after the diversion core 400 is placed in the diversion core hole 511, the diversion core 400 tightens up the rear Duan Song and the front section, the rear section is favorable for quickly absorbing ink from the liquid storage cavity 300, and the front section is favorable for slowing down the flow rate of ink, thereby preventing the ink from overflowing too much.

The rear end of the diversion core hole 511 is provided with a first diameter-expanding hole 514 with the diameter larger than that of the thick hole 513, and a diversion gap surrounding the diversion core 400 is formed between the first diameter-expanding hole 514 and the diversion core 400, so that ink in the liquid storage cavity 300 can be conveniently reserved in the diversion gap, and the diversion core 400 can be kept wet continuously. The front end of the wick hole 511 is provided with a second diameter-enlarging hole 515 with a diameter larger than that of the fine hole 512, which is used for storing ink at the leaking position of the joint of the wick hole 511 and the brush 700, so that the front end of the wick 400 can be kept wet continuously, and the brush 700 can absorb ink and keep wet continuously.

The peripheral wall of the rear tube section 540 is provided with a liquid through hole 570 which is communicated with the liquid storage groove 560 and the water diversion core hole 511, and the liquid through hole is used for guiding the ink flowing into the liquid storage groove 560 into the thick hole 513 to prevent the ink from accumulating in the liquid storage groove 560.

Each of the water blocking blades 550 is provided with a flow slit 552, and the ink in the adjacent liquid storage grooves 560 can flow through each other through the flow slit 552, and at this time, when the ink is accumulated in the liquid storage groove 560 at the rear end, the ink can flow into the liquid storage groove 560 at the front end in sequence through the flow slit 552 and then flow into the wick hole 511 through the liquid through hole 570. In this embodiment, the flow-through slits 552 extend from the outer circumferential surface of the rear pipe section 540 to the outer circumferential surface of the water blocking vane 550 in the radial direction of the water blocking vane 550, and the flow-through slits 552 are located on the same axis.

Referring to fig. 7-9, each water blocking blade 550 is provided with a vent notch 551 with a U-shaped opening on the outer circumferential surface thereof, an air flow channel is formed between the middle joint sleeve 600 and the regulator 500 by the arrangement of the vent notches 551, and at least a portion of the vent notches 551 are arranged in a staggered manner, so that the air flow channel is twisted in a meandering manner to form a labyrinth air flow channel, thereby preventing ink in the liquid storage chamber 300 from flowing out of the water pen along the air flow channel, and improving the anti-leakage effect of the water pen.

Preferably, the ventilation notch 551 located in the middle of the labyrinth air flow passage is offset from at least part of the ventilation notches 551 at both ends of the middle. In this embodiment, the number of the water-blocking blades 550 is 40 to 50, and the air vent gaps 551 of the water-blocking blade 550 located at the middle and the water-blocking blade 550 located at the foremost end of the regulator 500 are disposed at 90 degrees offset with respect to the air vent gaps 551 of the other water-blocking blades 550.

The nib 200 includes a nib mounting portion 210 sealingly inserted into the mounting gap 660 and a tapered tip 220 located in front of the nib mounting portion 210, and the rear end surface of the nib mounting portion 210 abuts against the collar 520. Specifically, the pen point mounting portion 210 has a cylindrical outer circumferential surface matched with the middle joint sleeve 600, after the pen point mounting portion 210 is inserted in the mounting gap 660 in a sealing manner, the outer circumferential surface of the pen point mounting portion 210 is tightly attached to the cavity wall of the regulator mounting cavity 230 of the middle joint sleeve 600, the inner cavity wall of the pen point mounting portion 210 is in sealing sleeve connection with the front tube section 530 of the regulator 500, and the rear end surface of the pen point mounting portion 210 is in contact with the convex ring 520 to achieve mounting and positioning of the pen point 200. The tapered end 220 has a tapered outer circumference. The outer circumference of the pen point mounting part 210 is provided with a clamping block 211, the inner cavity wall of the front section 630 of the middle joint sleeve 600 is provided with a clamping groove 670 matched with the clamping block 211, the clamping block 211 of the pen point mounting part 210 is clamped in the clamping groove 670 of the inner cavity wall of the front section 630, so that the pen point 200 is fixedly connected with the middle joint sleeve 600, and further the pen point 200 is fixedly connected with the pen holder 100. The diameter of the rear end face of the tapered end head 220 is larger than the outer diameter of the pen point mounting part 210, after the pen point 200 is fixedly connected with the middle joint sleeve 600, the rear end face of the tapered end head 220 is abutted to the front end face of the middle joint sleeve 600 to be limited, and preferably, the outer diameter of the rear end face of the tapered end head 220 is equal to that of the front end face of the middle joint sleeve 600.

Specifically, the pen point mounting portion 210 is provided with two first ventilation grooves 212, in this embodiment, the two first ventilation grooves 212 are symmetrically arranged along the central axis of the pen point mounting portion 210, and the rear end surface of the tapered end head 220 is provided with a second ventilation groove 260 for communicating the first ventilation groove 212 with the outside. The outer diameter of the convex ring 520 is smaller than the cavity diameter of the regulator mounting cavity 230, so that an airflow butt joint cavity is formed between the convex ring 520 and the middle joint sleeve 600, external airflow flows into the airflow channel after passing through the airflow butt joint cavity along the second ventilation groove 260 to the first ventilation groove 212, and then enters the inner cavity of the pen holder 100 through the labyrinth airflow channel, airflow exchange between the inner cavity of the pen holder 100 and the outside is achieved, air pressure inside and outside the pen holder is balanced, and the phenomenon that ink is blocked when the water-based pen is discharged is avoided.

Further, a connecting groove is formed in the protruding ring 520, and two ends of the connecting groove are respectively in butt joint with the ventilation notch 551 of the water blocking blade 550 and one of the first ventilation grooves 212, so that the ventilation efficiency between the first ventilation groove 212 and the water blocking blade 550 is improved.

The inside of the nib 200 is divided into an adjuster insertion hole 230 and a brush mounting hole, the adjuster insertion hole 230 extends from the rear end face of the nib 200 to the inside of the tapered tip 220, the brush mounting hole extends from the adjuster insertion hole 230 to the front end face of the nib 200, the brush mounting hole comprises a straight pipe section 241 connected with the adjuster insertion hole 230 and a tapered pipe section 242 arranged at the other end of the straight pipe section 241, and a front pipe section 530 of the adjuster 500 is inserted in the adjuster insertion hole 230 in a sealing manner, so that a water diversion wick hole 511 in the adjuster 500 is arranged in a manner of being isolated from the first vent groove 212 and the second vent groove 260, and ink is prevented from leaking out from a front port of the water diversion wick hole 511 along a gap between the adjuster 500 and the nib 200 and then from the first vent groove 212 and the second vent groove 260. Specifically, the first sealing protrusion ring 240 is disposed in the adjuster insertion hole 230 and is in sealing contact with the front end peripheral surface of the adjuster 500.

The adjuster socket hole 230 has a larger diameter than the straight pipe section 241 so that a stopper positioning step 250 is formed between the adjuster socket hole 230 and the brush attachment hole. The brush 700 is made of sponge, as shown in fig. 6, and includes a main body countersunk head 710 and a positioning protruding ring 720 disposed at the rear end edge of the main body countersunk head 710 and protruding out of the outer circumferential surface thereof, the front end surface of the adjuster 500 abuts against the rear end surface of the positioning protruding ring 720, so that the front end surface of the positioning protruding ring 720 abuts against the stopping positioning step 250, thereby realizing the isolation between the adjuster insertion hole 230 and the brush mounting hole, and preventing ink from leaking out from the adjuster insertion hole 230 along the brush mounting hole; meanwhile, the positioning convex ring 720 is abutted against the stop positioning step 250, so that the brush head 700 is fixed, and the main body conical head part 710 is fixed in the brush mounting hole. In this embodiment, the outer circumferential surface of the main body tapered portion 710 located in the brush mounting hole is in contact with and engaged with the tapered inner wall of the tapered pipe section 242 of the brush mounting hole, and is stopped and positioned by the tapered pipe section 242 to prevent the brush 700 from falling off and ink from leaking out of the brush mounting hole.

The brush 700 has a water-diversion core mounting hole at the tail end thereof, which extends axially into the brush 700, and the front end of the water-diversion core 400 is inserted into the water-diversion core mounting hole in an interference fit manner, so that the brush 700 is fixedly connected to the water-diversion core 400.

The water guide core 400, the regulator 500 and the brush 700 are arranged in the pen point 200 and the middle sleeve 600. The rear end face of the regulator 500 is flush with the rear end face of the middle joint sleeve 600, the front end face of the regulator 500 is abutted against the rear end face of the brush 700, the joint of the brush 700 and the water guide core 400 is arranged in the regulator inserting hole 230 and close to one end of the straight pipe section 241, the port of the first vent groove 212 in butt joint with the labyrinth airflow channel is far away, ink at the front port of the water guide core hole 511 is further prevented from leaking along the gap between the regulator 500 and the pen point 200 through the first vent groove 212 and the second vent groove 260, and the integral anti-leakage effect of the water pen is improved.

Referring to fig. 10 and 11, one end of the pen cap 800 is closed, and the other end is open, an annular engaging recess is formed on the inner wall of the pen cap 800 near the open end, and an annular engaging protrusion matched with the annular engaging recess is formed on the outer circumferential surface of the front section 630 of the middle sleeve 600. The pen cap 800 is fastened on the middle sleeve 600, the opening end face of the pen cap 800 abuts against the convex ring 610 and is stopped by the convex ring 610, and the annular fastening protrusion on the front section 630 of the middle sleeve 600 is fastened into the annular fastening recess of the pen cap 800. An annular stopping protrusion 801 is arranged on one side, close to the closed end, of the inner wall of the pen cap 800, an annular convex ring 802 is arranged between the annular stopping protrusion 801 and the closed end, and a limiting groove 803 is formed between the annular convex ring 802 and the annular stopping protrusion 801. The pen cap 800 has a projection 804 at the center of the inner bottom wall.

The inner wall of the pen cap 800 is further provided with a second sealing convex ring 820, after the pen cap 800 is buckled on the middle joint sleeve 600, the second sealing convex ring 820 contacts with the outer circumferential surface of the front section of the middle joint sleeve 800, so that the pen cap 800 is hermetically connected with the middle joint sleeve 600, and the brush 700 is prevented from being dried and knotted in the pen cap 820 after the pen cap 800 is buckled on the middle joint sleeve 600. In this embodiment, the second sealing convex rings 820 are spaced by two circles, and indeed, in other embodiments, the number of the sealing convex rings 820 may be other.

The inner cover 810 is arranged in the inner cavity of the pen cap 800 and is used for reducing the space of the pen cap 800 for accommodating the brush 700, specifically, the inner cover 810 is provided with a bottom straight section 811 and a main body section 812 from the closed end to the open end of the pen cap, the inner wall of the bottom straight section 811 is a cylindrical wall, a partition 813 for dividing the inner cavity into two parts is arranged in the inner cavity of the bottom straight section 811, and a groove matched with the convex block 804 is arranged at the center of the outer bottom wall of the bottom straight section 811; body section 812 includes inner and outer rings 814, 815 integrally formed with one another at their rearward ends, with the inner and outer rings 814, 815 being angled relative to one another. A third sealing convex ring 816 which is used for contacting with the inner wall of the pen cap 800 is arranged on the outer wall of the outer ring 815, so that the inner cap 810 and the pen cap 800 are connected in a sealing manner; the front end of the inner ring 814 is connected with the rear end of the bottom straight section 811, the inner wall aperture of the inner ring 814 is a tapered wall which is tapered towards the bottom straight section 811, the front end of the tapered end head 220 is positioned in the inner ring 814, a gap is formed between the outer peripheral wall of the tapered end head 220 and the inner wall of the inner ring 814, and the brush head of the brush 700 extends into the bottom straight section 811.

The main body section 812 comprises an inner ring 814 and an outer ring 815 which are connected with each other at the rear end and are integrally formed, an included angle is formed between the inner ring 814 and the outer ring 815, the front end of the inner ring 814 is connected with the rear end of the bottom straight section 811, the inner wall of the inner ring 814 is a tapered wall which is tapered towards the diameter of the bottom straight section 811, the outer wall of the outer ring 815 is a cylindrical wall, and the outer wall of the outer ring 815 is in sealing contact with the inner wall of the pen cover 800.

The outer ring 815 of the inner cap 810 is inserted into the limiting groove 803, the bottom straight section 811 is inserted into the limiting groove 803, and the protrusion 804 pushes into the groove, so that the inner cap 810 cannot fall out of the inner cavity of the pen cap 800.

In this embodiment, the partition 813 is disposed in the inner cap 810, so as to further reduce the space for accommodating the brush 700 in the cap 800, further reduce the air content remaining in the cap 800 after the cap 800 is fastened to the middle joint 100, prolong the time required for air-drying the ink on the brush 700 after capping, and improve the wetting duration of the brush 700.

When the pen cap 800 is fastened with the pen point 200, the brush 700 extends into the inner cover 810, the brush head of the brush 700 does not contact the partition 813, a certain gap is kept between the pen point 200 and the inner ring 814, the inner wall of the pen cap 800 close to the opening end is in close contact with the outer wall of the front end of the middle joint sleeve 600, the annular buckling bulge on the front section 630 of the middle joint sleeve 600 is buckled into the annular buckling depression of the pen cap 800, a completely closed space is formed between the pen holder 100, the pen point 200 and the inner cover 810, the second air channel 260 is located in the closed space, the internal air pressure is stable, air exchange between the external atmosphere and the inner cavity of the pen holder is avoided, and therefore the ink is further prevented from overflowing and being air-dried when not used.

In this embodiment, the inner chamber of pen holder 100 includes first inner chamber 130 near the front end and second inner chamber 140 near the rear end, keep apart each other through baffle 150 between first inner chamber 130 and the second inner chamber 140, stock solution chamber 300 sets up in first inner chamber 130, be provided with balancing weight 900 in the second inner chamber 140, change the weight of whole water-based pen through changing different balancing weights 900, satisfy the demand that different users liked to use the pen of different weights, improve user experience and feel.

The tail end of the pen holder 100 is provided with a tail plug 160 capable of sealing the second inner cavity 140, the outer circumferential surface of the tail plug 160 is provided with two circles of second annular protrusions, the inner pipe wall of the second inner cavity 140 is provided with second annular recesses matched with the third annular protrusions, and the second annular protrusions are clamped in the second annular recesses, so that the inner plug is detachably connected with the pen holder 100.

When the water-based pen is assembled, the regulator 500, the water inlet core 400 and the brush 700 are assembled in the middle joint sleeve 600, and then the middle joint sleeve 600 is installed in the pen holder 100 to install the pen point 200. The inner cap 810 is assembled into the cap 800, the cap 800 is snapped onto the middle cap 600, and after the snap-fitting is in place, the edge of the mouth of the inner cap 810 is sealed with the middle cap 600.

The above detailed description of one embodiment of the present invention is only for the purpose of illustrating the preferred embodiments of the present invention, and should not be taken as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims (7)

1. A leakage-proof water pen comprises a pen holder, a pen point, a water diversion core, an adjuster, a middle joint sleeve, a brush and a pen cover, wherein a liquid storage cavity is arranged in the pen holder, the pen holder is sleeved on the rear section of the middle joint sleeve in a sealing and tight fit mode, the pen cover is buckled on the front section of the middle joint sleeve, the adjuster is arranged in an adjuster mounting cavity of the middle joint sleeve, the water diversion core is arranged in a water diversion core hole of the adjuster, the front end of the water diversion core is connected with the rear end of the brush, and the front end of the brush extends out of the pen point.

2. The air-permeable leakage-proof structure of a water pen as claimed in claim 1, wherein said air-permeable notch is a U-shaped opening located on the outer circumferential surface of said water-blocking blade.

3. The air-permeable leakage-preventing structure of a water pen as claimed in claim 1, wherein the air-permeable gaps located in the middle of the labyrinth air-flow passage are arranged in a staggered manner with respect to at least some of the air-permeable gaps located at both ends of the middle of the labyrinth air-flow passage.

4. The air-permeable leakage-proof structure of a water pen according to claim 1, wherein a liquid storage groove is formed between adjacent water-blocking blades, and a liquid through hole for communicating the liquid storage groove with the wick hole is provided in the circumferential wall of the regulator.

5. The air-permeable leakage-proof structure of the water pen as claimed in claim 1, wherein a liquid storage groove is formed between adjacent water-blocking blades, and each water-blocking blade is provided with a flow-through slit for communicating the adjacent liquid storage grooves.

6. The air-permeable leakage-proof structure of a water pen as claimed in claim 1, wherein a water-guiding core mounting hole is formed on the rear end surface of the brush and extends axially into the brush, and the front end of the water-guiding core is inserted into the water-guiding core mounting hole.

7. The water-based pen according to claim 1, wherein an inner cap is arranged in the pen cap, the inner cap has a bottom straight section and a main body section from the closed end to the open end of the pen cap, and the inner wall of the bottom straight section is a cylindrical wall; the main part section includes rear end interconnect and integrated into one piece's inner circle and outer lane, the inner circle with the contained angle has between the outer lane, being close to of inner circle the one end of blind end with the one end of the straight section of bottom is connected, the inner wall of inner circle is the aperture orientation the tapered wall of the straight section convergent of bottom, the outer wall of outer lane is the cylinder wall just the outer wall of outer lane with the inner wall sealing contact of pen cap.

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