JP7108287B2 - water brush pen - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water brush pen that is used by filling water in a water reservoir and supplying water to the tip by a simple operation on the operation part at the rear end.

Conventionally, when drawing pictures using paints such as water-based coloring agents, the paints were dissolved with a special brush or mixed multiple colors on a palette and applied to the drawing paper. When performing such work, a container is filled with water in advance, and the tip of the brush is soaked in the water to replenish water.

However, with the above-mentioned conventional method, not only is the preparation complicated, but it is also difficult to quickly draw a picture at a distance or on the go. See Patent Document 1). These water brush pens store water inside the brush and supply this water to the tip.

JP-A-2000-1086

However, the paintbrush and paint set of Patent Document 1 increases the internal pressure of the brush body by compressing a substantially bellows-shaped water supply means provided at the rear end of the brush with water filled inside the brush body. Water is supplied by pushing it out from the tip to the tip, and it is difficult to adjust the compression of the bellows to supply an appropriate amount of water to the tip. In addition, in order to fill the inside of the brush body with water, it is necessary to aim the hole at the rear end of the brush body and inject the water into the inside, and the operability is not good.

Accordingly, the present invention has been made in view of the above problems, and is a water brush capable of filling water into the water storage portion of the hollow cylindrical portion by a simple operation by opening and closing the valve mechanism, and further supplying water to the tip easily. The purpose is to provide a pen.

In order to solve the above problems, the present invention
a hollow cylindrical body having an opening located at the rear end, a water passage hole located at the front end, and a water reservoir located between the opening and the water passage;
an operation unit having a valve mechanism that can be opened and closed by knocking disposed at the rear end;
a tip disposed on the tip side of the hollow cylindrical body for supplying water from the water reservoir;
To provide a water brush pen characterized by

In the water brush pen of the present invention having such a configuration, the valve mechanism can be opened and closed by applying force to the knock provided at the rear end of the operation portion, and water can be easily filled into the water storage portion. Furthermore, water can be supplied to the tip by flowing out from the water reservoir. In addition, since water can be supplied to the tip while the user is holding a picture, operability is also excellent. Furthermore, since the water in the water reservoir is discharged to the outside according to the application time of the force to the knock, the user can supply a desired amount of water to the tip with a simple operation.

Further, in the water brush pen of the present invention, it is desirable that the diameter of the water passage hole is in the range of 10% to 40% of the diameter of the water reservoir.

In the water brush pen of the present invention having such a configuration, air cannot easily enter the water reservoir through the water passage hole. It is possible to suitably prevent water leakage from the water passage hole to the outside.

Further, in the water brush pen of the present invention, it is preferable that the water passage hole and the rear end of the tip are spaced apart within a range of 3 mm to 10 mm.

In the water brush pen of the present invention having such a configuration, since the water passage hole and the rear end of the tip are preferably spaced apart, the tip of the tip caused by water located near the water passage contacting the rear end of the tip to prevent unintentional water supply to the

Further, in the water brush pen of the present invention, the hollow cylindrical body is provided with a substantially conical portion extending from the tip toward the rear end, and the water passage hole is formed at the tip of the substantially conical portion. It is desirable to have

In the water brush pen of the present invention having such a configuration, the water passage hole and the rear end of the tip are physically separated more reliably, so that water located near the water passage hole does not come into contact with the rear end of the tip. Therefore, it is possible to prevent unintended supply of water to the tip, and to prevent backflow of water from the tip to the water reservoir.

To provide a water brush pen capable of filling a water storage part of a hollow cylindrical part with water by a simple operation by opening and closing a valve mechanism by using the water brush pen of the present invention, and furthermore, capable of easily supplying water to the tip. can be done.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing which shows the outline|summary of the water brush pen 1 of this embodiment. 2A is a cross-sectional view of the hollow cylinder 3 cut in the axial direction X, and FIG. 2B is a cross-sectional view of FIG. ), and FIG. 2(c) is a side view of arrow B shown in FIG. 2(a). 3(a) is a cross-sectional view of the tip fixing device 21 cut in the axial direction X, and FIG. 3(b) is a cross-sectional view of FIG. ) is a side view of arrow C shown in FIG. 4(a) is a cross-sectional view of the tip 7 in the axial direction X, and FIG. 4(b) is an arrow D shown in FIG. 4(a). is a side view of the. Fig. 5(a) is a cross-sectional view of the operating portion 5 in the valve closed state cut in the axial direction X, and Fig. 5(b) is a cross-sectional view showing the structure of the operating portion 5 in Fig. 1; 4 is a cross-sectional view of the operating portion 5 in the valve open state cut along X. FIG. 4 is a schematic diagram showing a method of connecting the hollow cylindrical body 3 and the operating portion 5. FIG. It is a diagram showing a method of fixing the tip 7 to the hollow cylinder 3 using the tip fixing part 21, and FIG. 7A is a schematic diagram showing a state where the tip 7 is inserted into the tip fixing part 21. FIG. 7(b) is a schematic diagram showing a state in which the tip fixing portion 21 through which the tip 7 is inserted is connected to the hollow cylindrical body 3. As shown in FIG. FIG. 8A is a diagram showing how to use the water brush pen 1 of this embodiment, FIG. FIG. 8(b) is a schematic diagram showing a state in which the water reservoir 9 is filled with water 51. As shown in FIG. FIG. 9A is a diagram showing how to use the water brush pen 1 of the present embodiment, and FIG. 9A is a schematic diagram showing a state where the tip 7 is fixed to the tip side F of the hollow cylindrical body 3 filled with water 51. 9(b) is a schematic diagram showing a state in which force is applied to the knock 11 of the operation portion 5 to supply water 51 to the tip 7. As shown in FIG. 10(a) is a cross-sectional view of the hollow cylinder 103 cut in the axial direction X, and FIG. 10(b) is shown in FIG. 10(a). It is a side view of arrow E, and FIG.10(c) is a side view of arrow F shown to Fig.10 (a). Fig. 11(a) is a plan view showing the structure of the packing 44, and Fig. 11(b) is a plan view of the packing 44 viewed from the tip 7 side; It is a sectional view.

Hereinafter, representative embodiments of a water brush pen according to the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the illustrated ones, and each drawing is for conceptually explaining the present invention. In some cases, it is represented by changing it. Furthermore, in the following description, the same or corresponding parts are denoted by the same reference numerals, and redundant description may be omitted.

1. Overview of Water Brush Pen 1 An overview of a water brush pen 1 according to the present embodiment will be described with reference to FIG. FIG. 1 is a cross-sectional view showing an outline of a water brush pen 1 of this embodiment. A water brush pen 1 comprises a hollow cylindrical body 3 , an operation portion 5 and a tip 7 . Water 51 is filled in the water storage part 9 inside the hollow cylindrical body 3, and the water 51 is properly permeated into the tip 7 by a simple operation of the operation part 5, for example, water-based coloring agent is easily dissolved to draw a watercolor painting or the like. can be done.

Of course, the water brush pen 1 can also be used for writing characters on water brush paper (including water writing paper). Further, the water 51 in the present embodiment may be ordinary tap water, or may be water-based paint containing a water-based colorant or the like. As described above, the water brush pen 1 of the present embodiment is a highly convenient drawing material.

2. Structure of Water Brush Pen 1 <Configuration of Water Brush Pen 1>
Next, the structure of the water brush pen 1 will be described in detail. As shown in FIG. 1, the water brush pen 1 of the present embodiment includes a hollow cylindrical body 3 that stores water 51 in the main body of the pen, and is disposed at the rear end of the hollow cylindrical body 3 so that the user can operate the water 51 to flow out. a tip 7 that is disposed at the tip of the hollow cylinder 3 and applies a water-based coloring agent or the like to paper while being supplied with water 51; and a tip fixture that fixes the tip 7 to the hollow cylinder 3. 21 and consists of roughly four parts. As shown in FIG. 1, in the present embodiment, the axial direction of the water brush pen 1 is represented by X, the front end side in the axial direction is F, and the rear end side is R. As shown in FIG.

<Structure of Hollow Cylindrical Body 3>
Next, the structure of the hollow cylindrical body 3 will be described in detail with reference to FIGS. 2(a), 2(b) and 2(c). 2(a), 2(b), and 2(c) are views showing the structure of the hollow cylinder 3, and FIG. 2(a) is a cross-sectional view of the hollow cylinder 3 cut in the axial direction X. 2(b) is a side view of arrow A shown in FIG. 2(a), and FIG. 2(c) is a side view of arrow B shown in FIG. 2(a). The hollow cylinder 3 is the main body of the water brush pen 1, and other parts are arranged in the hollow cylinder 3. As shown in FIG. Also, the user grips the hollow cylindrical body 3 to operate it.

As shown in FIGS. 2(a), 2(b) and 2(c), the hollow cylindrical body 3 is a component formed of resin or the like into a substantially cylindrical shape having a predetermined length. In this embodiment, the cross-sectional shape is formed in a substantially circular shape, but it is not necessarily limited to this. can be Further, the hollow cylinder 3 has a hollow water storage portion 9 inside, and a predetermined amount of water 51 can be stored in the water storage portion 9 .

The hollow cylindrical body 3 has an opening 19 positioned on the rear end side R, a water passage hole 15 positioned on the front end side F, and a water reservoir 9 positioned between the opening 19 and the water passage hole 15 . More specifically, a tip edge 27 is formed on the tip side F and is formed substantially perpendicular to the axial direction X, and this tip edge 27 abuts on the tip 7 . An inner edge of the tip edge 27 is formed with a substantially conical portion 17 projecting inside the rear end side R while decreasing in diameter (that is, from the tip to the rear end). Further, a substantially circular water passage hole 15 is formed at the center (tip) of the end opposite to the rear end side R of the substantially conical portion 17. The water reservoir 9 is communicated with the outside. It should be noted that the substantially conical portion 17 may be a part separate from the hollow cylindrical body 3 and assembled to be integral with the hollow cylindrical body 3 . may be provided with a generally cylindrical portion.

The substantially conical portion 17 is desirably formed such that the distance D1 in the axial direction X between the tip edge 27 and the water passage 15 is in the range of 1 mm to 10 mm (more preferably 3 mm to 10 mm). As a result, when the tip 7 is connected to the hollow cylindrical body 3, the rear end of the tip 7 and the water passage hole 15 are preferably spaced apart, and the water 51 stored in the water reservoir 9 flows into the rear end of the tip 7. Since there is no direct contact, unintended supply of water 51 to tip 7 and backflow of water 51 from tip 7 to water reservoir 9 can be prevented. When the tip 7 is viewed from the water reservoir 9, the water reservoir is located on the tip side F of the water reservoir 9, and excessive supply of water to the tip 7 can be prevented.

In addition, a first step 23 is formed on the front end side F of the hollow cylinder 3 to reduce the outer diameter by a predetermined amount. match. The height dimension and length dimension of the first step 23 may be appropriately determined according to the dimensions of each part of the tip fixture 21 .

An opening 19 is formed in the rear end side R, and the outside of the rear end side R and the water reservoir 9 are communicated through this opening 19 . A second step 25 is formed on the rear end side R of the hollow cylindrical body 3 to widen the inner diameter of the water reservoir 9 by a predetermined amount. An operation part 5 is connected to the hollow cylinder 3 . The height dimension and length dimension of the second step 25 may be appropriately determined according to the dimensions of each portion of the operation portion 5 .

The water reservoir 9 formed inside the hollow cylindrical body 3 is formed from the front end side F to the rear end side R, and as described above, the front end side F communicates with the outside through the water passage hole 15, The end side R communicates with the outside through an opening 19 . It is desirable that the diameter θ2 of the water reservoir 9 be approximately the same at any position except for the second step 25 on the rear end side R.

The diameter θ1 of the water passage hole 15 is desirably within a range of 10% to 40%, more preferably within a range of 10% to 30% of the diameter θ2 of the water reservoir 9. As a result, air cannot easily enter the water storage portion 9 through the water passage hole 15, so that when the operation portion 5 is in the valve closed state, the water 51 stored in the water storage portion 9 flows out through the water passage hole 15. water leakage can be suitably prevented. In this embodiment, the diameter θ2 of the water reservoir 9 is set to 8.5 mm, and the diameter θ1 of the water passage hole 15 is set within the range of 2.5 to 3 mm (more preferably 2.5 mm). This completely prevents the water 51 from leaking from the water reservoir 9 to the outside.

<Structure of Tip Fixing Tool 21>
Next, the structure of the tip fixture 21 will be described in detail with reference to FIGS. 3(a) and 3(b). 3(a) and 3(b) are diagrams showing the structure of the tip fixture 21. FIG. 3(a) is a cross-sectional view of the tip fixture 21 cut in the axial direction X, and FIG. b) is a side view of the arrow C shown in Fig.3 (a). The tip fixing tool 21 is a part for fixing the tip 7 to the tip side F of the hollow cylinder 3 .

As shown in FIGS. 3(a) and 3(b), the tip fixing member 21 is a component formed of resin or the like in a substantially cylindrical shape. A fixed rib 29 is formed to press against the body 3 side. A fixing opening 33 is formed in the rear end side R so as to be inserted into the front end side F of the hollow cylindrical body 3 and fitted with the first step 23 . In addition, it is desirable that the inner diameter of the tip fixing member 21 is appropriately determined according to the diameter of the hollow cylindrical body 3 and the diameter of the first step 23 so that both parts are properly fitted.

<Structure of tip 7>
Next, the structure of the tip 7 will be described in detail with reference to FIGS. 4(a) and 4(b). 4(a) and 4(b) are diagrams showing the structure of the tip 7. FIG. 4(a) is a cross-sectional view of the tip 7 in the axial direction X, and FIG. It is a side view of arrow D shown to (a). The tip 7 is a component that is arranged in the hollow cylindrical body 3 and receives water 51 to apply a water-based coloring agent or the like to paper.

The tip 7 is disposed on the front end side F of the hollow cylinder 3 and is for supplying water from the water reservoir 9, and is a component made of natural fibers such as chemical fibers or animal hair. is. As shown in FIGS. 4(a) and 4(b), the tip of the brush is formed from the rear end side R to the tip side F, and has the tip shape of a general brush used for painting, calligraphy, etc. . A smooth portion 35 is formed on the rear end side R so as to abut on the front edge 27 of the hollow cylinder 3 .

As shown in FIG. 4( b ), the smooth portion 35 has a substantially circular planar shape and is formed with a diameter substantially equal to the inner diameter of the tip fixture 21 . As a result, when the tip 7 is fixed to the hollow cylindrical body 3 using the tip fixture 21, only the tip of the tip 7 protrudes outside from the insertion hole 31 of the tip fixture 21, and the smooth portion 35 and the fixing rib 29 are hollow. The tip 7 can be firmly fixed to the hollow cylindrical body 3 by being sandwiched between the leading edge 27 of the cylindrical body 3 .

As with the tip of a general brush, the tip 7 is configured such that, for example, synthetic resin bristles are bundled and heated to melt and solidify near the base, and a brim is provided on the rear end side R (particularly the smooth portion 35). Alternatively, the rear end side R (especially the smooth portion 35) may be solidified with glue made of natural material such as starch or water-soluble synthetic resin. The dimensions of each portion of the tip 7 excluding the smooth portion 35 can be arbitrarily determined according to the use of the water brush pen 1 (thick drawing, thin drawing, etc.).

<Structure of Packing 44>
Next, the structure of the packing 44 will be described in detail with reference to FIG. 11(a) and 11(b) are diagrams showing the structure of the packing 44. FIG. 11(a) is a plan view of the packing 44 as seen from the tip 7 side, and FIG. It is sectional drawing of the arrow E shown to Fig.11 (a). The packing 44 is a component that abuts on the smooth portion 35 of the tip 7 and assists the movement of water 51 and air between the hollow cylinder 3 and the tip 7 .

The packing 44 is a substantially annular part made of resin, for example, and as shown in FIGS. It has a bottom surface 45 in contact, a through hole 47 communicating between the top surface 46 and the bottom surface 45, and a notched slit 48 communicating between the bottom surface 45, the through hole 47 and the side surface.

The size of each portion of the packing 44 may be appropriately determined according to the size of the smooth portion 35 of the tip 7 and the size of the hollow cylinder 3 within a range that does not impair the effects of the present invention. Of course, although the configuration including the packing 44 is representatively described in this embodiment, the water brush pen according to the present invention may have a configuration in which the packing 44 is omitted.

<Structure of Operation Unit 5>
Next, the structure of the operation unit 5 will be described in detail with reference to FIGS. 5(a) and 5(b). 5(a) and 5(b) are diagrams showing the structure of the operating portion 5. FIG. 5(a) is a cross-sectional view of the operating portion 5 in the valve closed state cut in the axial direction X. FIG. 5(b) is a cross-sectional view of the operating portion 5 in the valve open state cut in the axial direction X. FIG. The operation part 5 is arranged in the opening 19 located at the rear end of the hollow cylindrical body 3 and has a valve mechanism that can be opened and closed by knocking. It is a part that bears responsibility.

As shown in FIGS. 5(a) and 5(b), the operation unit 5 includes a knock 11 that is directly pressed by the user and a valve that can be switched between open and closed states by operating the knock 11. and a mechanism 13 . Further, the valve mechanism 13 is connected to a first part 13A having an air hole 39 that communicates between the front end side F and the rear end side R, and to the front end side F of the knock 11, and the air hole 39 of the first part 13A. in the axial direction X to open and close the valve.

As described above, the first part 13A is substantially cylindrical and has an air hole 39 therein, through which the second part 13B is inserted. It is desirable that the tip side F of the second component 13B has a similar shape to the tip side F of the air hole 39 and is formed with a dimension larger than that of the tip side F of the air hole 39 . A spring 41 that expands and contracts in the axial direction X is provided inside the knock 11, and the front end side F of the spring 41 is in contact with the rear end side R of the first component 13A.

Since the operation part 5 has the valve mechanism 13 having the above structure, the second part 13B moves toward the rear end side R when no force is applied to the knock 11, so the air hole 39 of the first part 13A The second part 13B is fitted and the operating part 5 is closed. Further, when force is applied to the knock 11 , the second component 13B moves toward the tip end side F, so that the second component 13B moves toward the tip end side F and is disengaged from the air hole 39 . is in the open state.

In this embodiment, the operating portion 5 having the structure described above is used, but it is not necessarily limited to this, and other structures may be used as long as they have a mechanism substantially similar to the valve mechanism 13 described above. You may use the operation part provided.

The first part 13</b>A has an annular rib 43 on its edge, and this annular rib 43 engages the second step 25 of the hollow cylinder 3 to connect the operation part 5 with the hollow cylinder 3 . Further, even if a force is applied to the knock 11, the first component 13A is fixed by the annular rib 43, so that only the second component 13B can be moved in the axial direction X.

<Assembly of each part>
Next, a method for assembling the components described above will be described in detail with reference to FIGS. 6 and 7(a) and (b). FIG. 6 is a schematic diagram showing a method of connecting the hollow cylindrical body 3 and the operating portion 5. As shown in FIG. 7A and 7B are diagrams showing a method of fixing the tip 7 to the hollow cylindrical body 3 using the tip fixing portion 21. FIG. 7B is a schematic diagram showing a state in which the tip fixing portion 21 through which the tip 7 is inserted is connected to the hollow cylinder 3. FIG.

First, the operation part 5 is connected to the rear end side R of the hollow cylinder 3 . As shown in FIG. 6 , the hollow cylinder 3 and the operation part 5 are arranged in the axial direction X, and the valve mechanism 13 of the operation part 5 is arranged to face the opening 19 of the hollow cylinder 3 . Next, the valve mechanism 13 of the operation portion 5 is inserted through the opening 19 of the hollow cylindrical body 3, and the annular rib 43 of the first component 13A is securely locked to the second step 25. As shown in FIG.

Subsequently, the tip 7 and the tip fixture 21 are connected to the tip side F of the hollow cylinder 3 . As shown in FIG. 7A, while arranging the tip 7 and the tip fixture 21 in the axial direction X, the tip 7 is inserted through the fixing opening 33 of the tip fixture 21, and the tip side F of the tip 7 is inserted through the insertion hole 31. Insert outside. Next, as shown in FIG. 7(b), the packing 44 is inserted into the fixing opening 33 of the tip fixing tool 21, and the tip side F of the hollow cylindrical portion 3 is further inserted. While fitting the inner diameter of the tip fixture 21 and the outer diameter of the first step 23 of the hollow cylinder part 3, the tip is held between the inside of the fixing rib 29 of the tip fixture 21 and the tip edge 27 of the hollow cylinder 3. The tip 7 is fixed to the front end side F of the hollow cylinder 3 by holding the smooth portion 35 of the hollow cylinder 3 . The bottom surface 45 of the packing 44 contacts the smooth portion 35 of the tip 7 , and the top surface 46 contacts the front end side F of the hollow cylinder 3 .

3. How to Use the Water Brush Pen 1 Next, a method for using the water brush pen 1 of the present embodiment will be described in detail with reference to FIGS. 8(a) and 8(b) and FIGS. 8(a) and 8(b) are diagrams showing how to use the water brush pen 1 of this embodiment. FIG. 8B is a schematic diagram showing a state in which F is immersed, and FIG.

9(a) and 9(b) are diagrams showing how to use the water brush pen 1 of this embodiment, and FIG. FIG. 9B is a schematic diagram showing a state in which water 51 is supplied to the tip 7 by applying force to the knock 11 of the operation unit 5. FIG. In this description, the water brush pen 1 is filled with the water 51 contained in the container 53 .

As shown in FIG. 8(a), first, the tip 7 and the tip fixture 21 are removed from the hollow cylindrical body 3 of the water brush pen 1, and the valve mechanism 13 is opened by applying force to the knock 11 of the operation part 5. and insert the distal end portion F of the hollow cylindrical body 3 into the container 53 . Subsequently, as shown in FIG. 8(b), after confirming that the water 51 in the container 53 is filled in the water reservoir 9 of the hollow cylinder 3, the force applied to the knock 11 is stopped and the valve mechanism is closed. 13 is closed, the hollow cylindrical body 3 is gradually lifted upward from the container 53 .

As shown in FIG. 9(a), the valve mechanism 13 acts to fill the water reservoir 9 of the hollow cylinder 3 with water 51, which stays inside. It connects to the tip F of the body 3 . By completing all the above procedures, preparation for use of the water brush pen 1 of the present embodiment is completed. As shown in FIG. 9B, the valve mechanism 13 is opened again by applying force to the knock 11, so that the water 51 filled in the water reservoir 9 flows out from the water passage hole 15. It can be used by draining water and supplying it to the tip 7. - 特許庁

In the water brush pen 1 having such a configuration, the water 51 flowing from the water passage hole 15 to the tip 7 hits the smooth portion 35 first, and then travels from the slit 48 of the packing 44 to the tip 7 along the inner wall of the fixed rib 29. Furthermore, it is included in the entire tip 7 from the periphery of the base of the tip 7 and goes to the tip. At this time, air and water 51 can be suitably exchanged, and water 51 can be supplied to the tip 7 smoothly. As described above, the water brush pen 1 does not necessarily have the packing 44. If the packing 44 is omitted, the water 51 passing through the water passage hole 15 comes into contact with the entire surface of the smooth portion 35 of the tip. It is included in the whole of 7 and goes to the tip.

Due to the structure of the valve mechanism 13, the water 51 in the water reservoir 9 is discharged to the outside according to the force application time (valve opening time) to the knock 11. A desired amount of water 51 can be supplied.

Although representative embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to these embodiments and does not depart from the spirit and teachings of the claims. Other refinements and variations exist within the scope. All such improvements and modifications are included in the technical scope of the present invention.

For example, a modification using a hollow cylindrical body 103 as shown in FIG. 10 is conceivable. 10(a), (b), and (c) are diagrams showing the structure of the hollow cylinder 103, and FIG. 10(a) is a cross-sectional view of the hollow cylinder 103 cut in the axial direction X. FIG. 10(b) is a side view of arrow E shown in FIG. 10(a), and FIG. 10(c) is a side view of arrow F shown in FIG. 10(a). In the hollow cylinder 103 used in the modified example, the tip can be directly supported by the hollow cylinder 103 without using other parts (the tip fixing member 21 in the water brush pen 1 described above).

As shown in FIGS. 10(a), 10(b) and 10(c), the hollow cylinder 103 has a tip support hole 104 on the front end side F, and a wall portion 117 is formed on the innermost side (rear end side R). ing. Further, a water passage hole 115 is formed substantially at the center of the wall portion 117, and the water 51 filled in the water storage portion 109 can be discharged to the outside of the tip side F. As shown in FIG. The diameter θ10 of the water passage hole 115 is preferably formed within a range of 10% to 40% (more preferably within a range of 10% to 30%) of the diameter θ20 of the water reservoir 109. The thickness dimension D10 of is desirably in the range of 1 mm to 10 mm (more preferably in the range of 3 mm to 10 mm). Also, the distance from the tip side F of the hollow cylinder 103 to the wall portion 117 and the diameter of the tip support hole 104 are determined according to the size of the tip to be used.

The hollow cylindrical body 103 having the above structure can be connected to the tip by inserting it into the tip support hole 104 with the smooth part of the tip facing the rear end side R. Also, by using the hollow cylindrical body 103, it is possible to reduce the number of parts and further simplify the structure. Furthermore, attachment and detachment of the tip when the water 51 is filled can be simplified.

The water brush pen of the present invention can open and close the valve mechanism with a simple operation to fill the water storage portion of the hollow cylindrical portion with water, and can easily supply water to the tip.

1 Water brush pen 3 Hollow cylinder 5 Operation part 7 Tip 9 Water storage part 11 Knock 13 Valve mechanism 15 Water passage hole 17 Approximately conical part 19 Opening 21 Tip fixture 23 First step 25 Second step 27 Tip edge 29 Fixing rib 31 Insertion hole 33 Fixed opening 35 Smooth part 39 Air hole 41 Spring 43 Annular rib 44 Packing 45 Bottom surface 46 Top surface 47 Through hole 48 Slit 51 Water 53 Container 103 Hollow cylindrical body 104 Tip support hole 109 Water reservoir 115 Water passage hole 117 wall θ1 diameter θ2 diameter θ10 diameter θ20 diameter D1 distance D10 thickness dimension

Claims (3)

a hollow cylindrical body having an opening located at the rear end, a water passage hole located at the front end, and a water reservoir located between the opening and the water passage;
an operation unit having a valve mechanism that can be opened and closed by knocking disposed at the rear end;
a tip disposed on the tip side of the hollow cylindrical body for supplying water from the water reservoir. death,
The diameter of the water passage hole is in the range of 10% to 40% of the diameter of the water reservoir. that,
A water brush pen characterized by The water passage hole and the rear end of the tip are separated in the range of 3 mm to 10 mm ,
The water brush pen according to claim 1, characterized by: wherein the hollow cylindrical body is provided with a substantially conical portion extending from the front end to the rear end, and the water passage hole is provided at the front end of the substantially conical portion ;
The water brush pen according to claim 1 or 2, characterized by:

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