JP2002059684A - Writing utensil for water discoloring medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a writing utensil for a water discoloring medium which is free from the possibilities that water might leak to the outside and can be easily handled by children. SOLUTION: The writing utensil 1 for a water discoloring medium is structured of a body 2, a pen point 3 and a water absorber 4, the pen point 3 being fitted to the forward end of the body 2. A water absorber 4 is housed inside the body 2 and the forward end of the water absorber 4 is connected to the rear end of the pen point 3. In addition, a communication hole 5 for making the rear end of the water absorber 4 communicate with the outside is formed in the rear part of the body 2. The writing utensil is constructed so that water is replenished by absorption into the water absorber 4 from the pen point 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a writing instrument for discolored water. More specifically, a water discolored body (that is, a material having a property that only the upper layer portion written with water becomes transparent, the color of the colored layer of the lower substrate appears, and returns to the original state due to evaporation of water. Writing instruments for use in, for example, water brush paper). In the present invention, "front" indicates the pen tip side, and "rear" indicates the tail plug side.

[0002]

2. Description of the Related Art In a conventional writing instrument for discolored water, for example, Japanese Utility Model Application Laid-Open No. 56-19380 discloses that a pen tip is protruded at the tip of a cylindrical pen shaft and a soft tip is provided at a rear end mounting opening. Attaching a plastic water tank and inside the pen shaft,
A pen for writing brush paper, which is fitted with a water-absorbing pipe filled with a water-absorbing material and connected so that the water in the water tank can be supplied to the pen tip. Is disclosed.

[0003] In the conventional writing instrument for water discolored body, when writing, by accidentally touching the water tank, the water tank is dropped from the rear end of the pen shaft, and water is leaked to the outside.
Alternatively, by accidentally touching the water tank, the inside of the water tank may be pressurized to supply an excessive amount of water to the water-absorbing material and leak water from the pen tip to the outside. Therefore, the above-mentioned conventional structure is not suitable for a child (that is, an infant or a child) to handle.

[0004]

SUMMARY OF THE INVENTION The object of the present invention is to solve the above-mentioned conventional problems, and to provide a writing instrument for a water-colored body which is easy for children to handle without fear of leaking water to the outside. Things.

[0005]

Means for Solving the Problems [1] The present invention relates to a main body 2
A pen tip 3 is provided at a front end of the body 2, a water absorber 4 is accommodated inside the main body 2, and a front end of the water absorber 4 and a rear end of the pen tip 3 are connected to each other. A writing instrument for water discolored body 1 configured to be capable of absorbing and replenishing water, wherein a communication hole 5 for communicating a rear end of the water absorber 4 with the outside is provided at a rear portion of the main body 2. It is required that the water absorber 4 be configured to be capable of absorbing and supplying water.

(Operation) When water is replenished from the pen tip 3 at the front part of the main body 2 (see FIG. 4), when the pen tip 3 is immersed in water, water is drawn by the capillary force of the pen tip 3 and the water absorber 4. Water is replenished into the absorber 4. At this time, the main body 2
The rear communication hole 5 functions as an air circulation hole for communicating the water absorber 4 with the outside air.
As the water is replenished with water, the air in the water absorber 4 is discharged from the communication hole 5 to the outside of the main body 2. Thereby, smooth exchange of air and water can be performed between the inside of the water absorber 4 inside the main body 2 and the outside of the main body 2, the pressure balance between the inside of the water absorber 4 and the outside air is maintained, and Water is smoothly absorbed and replenished into the body 4.

Therefore, the writing instrument 1 for water discolored body according to the first aspect of the present invention has a configuration in which water is externally absorbed into the water absorber 4 by utilizing the capillary force of the pen tip 3 itself and the water absorber 4 itself. Therefore, there is no possibility that the water absorbent 4 is replenished with a certain amount or more of water to leak water to the outside. In addition, since the conventional detachable replenishing means (for example, a water tank or the like) is not required, there is no possibility that water may be leaked to the outside by mistake when writing or using water. As a result, it is easier for children to handle.

[2] The writing implement 1 for a water discolored body according to the above [1].
In the above, the water absorber 4 is configured to be able to absorb and replenish water from the communication hole 5 at the rear part of the main body 2 (claim 2).
Is preferred.

(Operation) When water is supplied through the communication hole 5 at the rear part of the main body 2 (see FIG. 5), when the rear part of the main body 2 is immersed in water, the water absorber passes through the communication hole 5 at the rear part of the main body 2. Water comes into contact with the rear end of the water absorber 4, and the water is absorbed and supplied into the water absorber 4 by the capillary force of the water absorber 4. That is, in this case, the communication hole 5 at the rear part of the main body 2 functions as a water circulation hole.
In this case, the pen tip 3 functions as an air circulation hole, and as the water is replenished into the water absorber 4 from the communication hole 5, the air in the water absorber 4 inside the main body 2 is filled with the pen. It is discharged from the tip 3 (ie, through the capillary gap of the pen tip 3) to the outside of the main body 2. Thereby, smooth exchange of air and water can be performed between the inside of the water absorber 4 inside the main body 2 and the outside of the main body 2, the pressure balance between the inside of the water absorber 4 and the outside air is maintained, and Water is smoothly absorbed and replenished into the body 4.

The writing instrument for discolored water according to the second aspect of the present invention is not shown, except for the water replenishing method (FIGS. 4 and 5). In addition, water can be absorbed and replenished from the communication hole 5 and the air can be exhausted from the water at the same time, so that the water absorber 4 can be quickly replenished with water.

[3] The writing implement 1 for a water discolored body according to the above [1].
In this case, the position at which the communication hole 5 at the rear of the main body 2 is opened to the outside may be any position as long as it is at the rear of the main body 2. It is effective to open to the outside at a position behind the rear end of the body 4 (claim 3).

(Operation) When water is to be absorbed and supplied from the rear part of the main body 2 (see FIG. 5), when the rear part of the main body 2 is immersed in the water, water is quickly transferred from the communication hole 5 to the rear end of the water absorber 4. Can be supplied, and the time for water absorption and replenishment can be reduced.

[4] In the writing instrument for water discolored body 1 according to any one of claims 1 to 3, a communication hole 6 is provided at a front portion of the main body 2 so as to communicate a front end of the water absorber 4 with the outside. (Claim 4) is preferred.

(Operation) When water is supplied from the front part of the main body 2 (see FIG. 4), when the front part of the main body 2 (that is, the pen tip 3 and the communication hole 6) is immersed in water, water is discharged from the pen tip 3. At the same time as the water absorber 4 is replenished with water, water enters the main body 2 also from the communication hole 6 at the front part of the main body 2, and the front part of the water absorber 4 is immersed in the front part of the main body 2 in water. Since it is immediately immersed in water, it can be directly replenished to the front part of the water absorber 4, and the water absorption replenishment time is shortened. The communication hole 6 is
Like the communication hole 5 at the rear part of the main body 2 (Claim 3), it is preferable to open the water absorber 4 to the outside at a position forward of the front end. Thereby, from the communication hole 6 to the front end of the water absorber 4,
Water can be supplied more quickly.

When water is supplied from the rear of the main body 2 (see FIG. 5), if the pen tip 3 is wet with water, air can be taken in from outside into the water absorber 4 inside the main body 2. Therefore, water cannot be smoothly supplied into the water absorber 4 from the rear portion of the main body 2. However, by providing the communication hole 6 in the front part of the main body 2, even when the pen tip 3 is wet with water, the inside of the main body 2 and the outside of the main body 2 can flow air through the communication hole 6, Smooth exchange of air and water can be performed between the inside of the water absorber 4 inside the main body 2 and the outside of the main body 2, and as a result, water can be removed from the rear part of the main body 2.
It becomes possible to replenish smoothly inside.

[5] In the water discoloring body writing instrument 1 according to any one of claims 1 to 4, the pen tip 3 and the water absorber 4 are:
It is preferable that the capillary force of the nib 3 is set to be larger than the capillary force of the water absorber 4 (claim 5).

(Function) The capillary force of the pen tip 3 is
When writing, the water is smoothly supplied from the water absorber 4 to the front end of the pen tip 3 during writing, and smooth writing on the water discoloration body becomes possible.
When water is replenished from the side, the capillary force of the pen tip 3 allows the pen to be smoothly drawn into the water absorber 4 and replenished. Further, since the pen tip 3 and the water absorber 4 are made of a fiber processed body or a synthetic resin porous body, a capillary gap for the pen tip 3 and the water absorber 4 to have an appropriate capillary force can be easily formed. Can be set.

Examples of the fiber processed body include a resin processed body of a fiber bundle, a heat fusion processed body of a fiber bundle, a resin processed body of felt, and a needle punched body of felt. Examples of the synthetic resin porous body include polyolefin-based, polyurethane-based, and continuous porous bodies of various other synthetic resins.

The pen tip 3 and the water absorber 4
May be a single member of a fiber processed body or a synthetic resin porous body, or may be a combination of a plurality of members of a fiber processed body or a synthetic resin porous body.

[6] The writing implement 1 for a water discolored body according to the above [1].
, A tail plug 8 is fixed to the rear end opening of the main body 2,
It is preferable to provide the communication hole 5 in the tail plug 8 (Claim 6).

(Operation) In the case of a configuration in which the tail plug 8 is fixed to the opening at the rear end of the main body 2, if the child plugs the tail plug 8 into the main body 2,
Even if it is removed from the rear end opening and swallowed by mistake, the communication hole 5 provided in the tail plug 8 can secure an airway inside the throat and avoid a choking accident.

[0022]

Embodiments of the present invention will be described with reference to the drawings.

(First Embodiment) FIGS. 1 to 6 show a first embodiment of the present invention. The water discoloring body writing instrument 1 of this embodiment includes a main body 2, a pen tip 3 fixed to the front end of the main body 2, and water stored in the main body 2 with the rear end and the front end of the pen tip 3 connected. It comprises an absorber 4 and a tail plug 8 abutting on the rear end of the water absorber 4 and fixed to the rear end of the main body 2.

The main body 2 is a cylindrical body obtained by injection molding of a synthetic resin (for example, polypropylene or the like), and a pen tip 3 is press-fitted into a front end opening of the main body 2 via a pen tip holding member 7. The tail plug 8 is press-fitted and fixed to the rear end opening of the main body 2. A water absorber 4 is housed inside the main body 2.

The pen tip 3 is a resin processed body of synthetic resin fiber (for example, a rod-shaped resin processed body of acrylic fiber,
The front end is ground or ground. As the water absorber 4, a processed fiber bundle (for example, a synthetic resin fiber bundle such as a polyester fiber bundle whose outer peripheral surface is covered with a synthetic resin film) is employed.

A plurality of (specifically, four) longitudinal ribs 21 extending in the axial direction are integrally provided at a front portion inside the main body 2. By the vertical ribs 21, the front outer peripheral surface of the water absorber 4 housed inside the main body 2 is pressed and held radially inward. Further, a step portion 21a is formed in front of a position where the water absorber 4 is pressed and held in the radial direction of the vertical rib 21.
The front end of the water absorber 4 is supported in the axial direction by the step portion 21a.

The tail plug 8 is a cylindrical body obtained by injection molding of a synthetic resin (eg, polyethylene). The tail plug 8 is provided with an abutting portion 81 axially abutting on the rear end of the water absorber 4, and a press-fit fixing portion 82 provided continuously with the contact portion 81 and press-fitted into the inner surface of the rear end opening of the main body 2. A flange 83 that is connected to the rear of the press-fit fixing portion 82 and abuts the rear end of the main body 2 in the axial direction;
And a cylindrical portion 84 protruding from the rear end.

The contact portion 81 has a cylindrical axial projection 81.
a, and a radial projection 8 connected to the axial projection 81a
The rear end of the water absorber 4 is supported in the axial direction by the axial projection 81a and the radial projection 81b. Further, a communication hole 5 (inner diameter 2 mm to 5 mm) for communicating the water absorber 4 with the outside air is provided in the axial projection 81 a in the axial direction.

Since the communication hole 5 is formed through the tail plug 8, if a child removes the tail plug 8 from the opening at the rear end of the main body 2, the child accidentally swallows the tail plug 8. However, since the ventilation hole can be formed inside the throat by the communication hole 5, a suffocation accident can be avoided. Further, the communication hole 5 is provided at the axis of the main body 2 (that is, the axis of the water absorber 4).
At the time of water absorption from the rear of the main body 2,
Water can be uniformly absorbed in the rear part of the water absorber 4.

A recess 85 communicating with the communication hole 5 and opening rearward is formed in the tail plug 8. Thereby, when water is supplied from the rear part of the main body 2, when the rear part of the main body 2 is immersed in water, the communication hole 5
, Water can be quickly introduced, and the time for replenishing water to the water absorber 4 can be reduced.

The pen tip holding member 7 is a tubular body obtained by injection molding of a synthetic resin (for example, polyacetal or the like). A pen tip mounting hole 7 is provided in the pen tip holding member 7.
The pen tip 3 is press-fitted and held in the pen tip mounting hole 71. The outer surface of the pen tip holding member 7 is press-fitted and fixed to the inner surface of the front end opening of the main body 2. Further, two axial grooves 72 in the axial direction are provided on the outer surface of the pen tip holding member 7 at opposing positions, whereby the main body 2 is press-fitted and fixed to the inner surface of the front end opening. The communication hole 6 can be formed between the inner surface of the front end opening and the outer surface of the pen tip holding member 7.

FIG. 4 shows an example of a method for replenishing water from the front part of the main body 2 of the present embodiment. Water 12 is accommodated in a container 11 made of a bottomed cylindrical body having an inner diameter larger than the outer diameter of the main body 2, and the front portion of the main body 2 having the nib 3 in the water 12 (that is, the nib 3 And the communication hole 6) is immersed, and the rear part of the main body 2 (that is, the communication hole 5) is exposed to the outside from the water surface. In this case, water penetrates into the main body 2 through the pen tip 3 and the communication hole 6 at the front part of the main body 2, and air inside the main body 2 (that is, inside the water absorber 4) flows out of the communication hole 5 at the rear part of the main body 2. As a result, the front part of the water absorber 4 is immediately immersed in the water by the depth of immersing the front part of the main body 2 in the water 12. Therefore, a sufficient amount of water for writing is absorbed and replenished into the water absorber 4 in a short time.

FIG. 5 shows an example of a method for replenishing water from the rear of the main body 2 of this embodiment. Container 1 similar to FIG.
1, water 12 is accommodated therein, the rear part of the main body 2 (that is, the communication hole 5) is immersed in the water 12, and the front part of the main body 2 (that is, the pen tip 3 and the communication hole 6) is located outside the water surface. Exposure to In this case, water penetrates into the main body 2 through the communication hole 5 provided in the tail plug 8, and the inside of the main body 2 (ie, the pen tip 3 at the front part of the main body 2 (that is, the capillary gap of the pen tip 3) and the communication hole 6). The air in the water absorber 4 is released to the outside, whereby the rear part of the water absorber 4 is immediately immersed in the water 12 by the depth of immersing the rear part of the main body 2 in the water 12. . For this reason, a sufficient amount of water for writing is absorbed and replenished in the water absorber 4 in a short time.

FIG. 6 illustrates a writing use state of the water discoloring body writing implement 1 of this embodiment. The water discoloration body 10 is rewritten by the water discoloration body writing implement 1 after water is replenished in the main body 2.
(For example, a water-discolorable fabric sheet) can be written on the surface. When writing, the communication hole 5 and the communication hole 6 function as air circulation holes, prevent a pressure drop inside the main body 2 due to consumption of water by writing, and obtain a smooth outflow of water from the pen tip 3. .

(Second Embodiment) FIGS. 7 and 8 show a second embodiment. This embodiment is a modification of the tail plug 8 of the first embodiment, and is different from the first embodiment in that the communication hole 5 is not provided in the axial center of the tail plug 8 as in the first embodiment. A vertical groove 86 is provided on the outer surface of the press-fit fixing portion 82 of the tail plug 8 and the front surface of the flange portion 83, thereby forming a communication hole 5 between the inner surface of the rear end opening of the main body 2 and the outer surface of the tail plug 8; Behind the flange 83 of the stopper 8
The point is that there is no cylindrical portion 84 as in the embodiment. Since the other configuration is the same as that of the first embodiment, the description thereof will be omitted.

(Third Embodiment) FIGS. 9 and 10 show a third embodiment. This embodiment is a modification of the tail plug 8 of the first embodiment, and is different from the first embodiment in that the pen tip 3 is provided at the front end of the main body.
And the point where the nib 9 is press-fitted into the tail plug 8 [ie,
A double-headed writing instrument having pen tips of different sizes or shapes at both ends of the main body 2 (specifically, a pen tip 3 and a pen tip 9), and a vertical groove on the inner surface of the recess 85 (ie, the pen tip mounting hole) The point that the communication hole 5 is formed between the inner surface of the concave portion 85 of the tail plug 8 and the outer surface of the pen tip 9 by providing the tail plug 8.

As in the first embodiment, the pen tip 9 provided on the tail plug 8 is a fiber resin processed body, and its front end is ground in a chisel shape. Since the other configuration is the same as that of the first embodiment, the description thereof will be omitted.

[0038]

According to the first aspect, when water is replenished from the pen tip at the front part of the main body, as the water is replenished into the water absorbent body, the air in the water absorbent body passes through the communication hole to the outside of the main body. Since the water is released, the water is smoothly absorbed and supplied into the water absorber. As a result, there is no danger of accidentally leaking water during writing use or water replenishment, and the child can easily handle the water.

According to the second aspect, when water is replenished through the communication hole in the rear part of the main body, as the water is replenished into the water absorbent body, the air in the water absorbent body inside the main body passes through the pen tip to the outside of the main body. Since the water is released, the water is smoothly absorbed and supplied into the water absorber. As a result, there is no danger of accidentally leaking water during writing use or water replenishment, and the child can easily handle the water.

According to the third aspect, when water is supplied from the rear part of the main body, when the rear part of the main body is immersed in water, water can be quickly supplied from the communication hole to the rear end of the water absorber. Can be shortened.

According to the fourth aspect, when replenishing water from the front part of the main body, the front part of the water absorber is immediately immersed in water by the amount of immersion of the front part of the main body in water, and the time required for water absorption and replenishment can be reduced. . Also, when water is supplied from the rear of the main unit, even if the pen tip is wet with water, air can flow between the inside of the main unit and the outside of the main unit, and water can be smoothly supplied to the water absorber from the rear of the main unit. Become.

According to the fifth aspect, it is possible to easily obtain a pen tip and a water absorber having an appropriate capillary gap. When writing, water is smoothly supplied from the water absorber to the front end of the pen tip. In addition, when water is replenished from the pen tip side, the water can be smoothly absorbed and replenished into the water absorber due to the capillary force of the pen tip.

According to the sixth aspect, even if the child removes the tail plug from the rear end opening of the main body and swallows the child accidentally,
By the communication hole provided in the tail plug, the airway inside the throat can be secured, and the suffocation accident can be avoided.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a first embodiment of a writing instrument for water discoloration of the present invention.

2A is a cross-sectional view taken along the line AA of FIG. 1, and FIG.
1 is a sectional view taken along line BB of FIG. 1, and FIG. 2C is a sectional view taken along line CC of FIG.

FIG. 3 is a front view of the pen tip unit of FIG. 1 (that is, an assembled state of a pen tip and a pen tip holding member).

FIG. 4 is an explanatory view showing water absorption and replenishment from the front part of the main body of FIG. 1;

FIG. 5 is an explanatory view showing water absorption and replenishment from the rear part of the main body of FIG. 1;

FIG. 6 is a perspective view showing a writing state of FIG. 1;

FIG. 7 is a longitudinal sectional view showing a second embodiment of the writing instrument for water discolored body of the present invention.

8A is a sectional view taken along line AA of FIG. 7, and FIG. 8B is a sectional view of FIG.
7B is a cross-sectional view taken along the line BB of FIG. 7, and FIG.

FIG. 9 is a longitudinal sectional view showing a third embodiment of the writing instrument for water discolored body of the present invention.

10A is a sectional view taken along line AA of FIG. 9, FIG. 10B is a sectional view taken along line BB of FIG. 9, and FIG. 10C is a sectional view taken along line CC of FIG.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 writing instrument for water discoloration body 2 main body 21 vertical rib 21 a step 3 pen tip (pen tip at front end of main body) 4 water absorber 5 communication hole (communication hole at rear of main body) 6 communication hole (communication hole at front of main body) 7 Pen tip holding member 71 Pen tip mounting hole 72 Vertical groove 8 Tail plug 81 Abutting part 81a Shaft protruding part 81b Radial protruding part 82 Press fit fixing part 83 Flange part 84 Tube part 85 Recessed part 86 Vertical groove 9 Pen point (body rear end) Pen tip) 10 water discolored body 11 container 12 water

Claims (6)

[Claims] A pen tip is provided at a front end of a main body, a water absorber is housed inside the main body, a front end of the water absorber is connected to a rear end of the pen tip, and water is contained in the water absorber. A water discoloring body writing instrument configured to be capable of absorbing and replenishing water, wherein a communication hole for communicating a rear end of the water absorber with the outside is provided at a rear portion of the main body, and water is supplied from the pen tip to the water absorber. A writing instrument for water discolored bodies, characterized by being configured to be capable of absorbing and supplying water. 2. The writing instrument for a water-colored body according to claim 1, wherein water can be replenished into the water absorber through a communication hole at a rear portion of the main body. 3. The writing instrument for a water-colored body according to claim 1, wherein a communication hole at a rear portion of the main body is opened to the outside at a position rearward of a rear end of the water absorber. 4. The writing implement for a water-colored body according to claim 1, wherein a communication hole is provided at a front portion of the main body so as to communicate with a front end of the water absorber and the outside. 5. The pen tip and the water absorber are made of a fiber processed body or a synthetic resin porous body, and the capillary force of the pen tip is set to be larger than the capillary force of the water absorber. 4. The writing implement for water discolored body according to any one of 4. 6. The writing instrument for a water-color-change body according to claim 1, wherein a tail plug is fixed to a rear end opening of the main body, and the communication hole is provided in the tail plug.