KR0119941Y1 - A writing implement utilizing ink reserving tube - Google Patents

Abstract

A writing instrument having an ink container capable of increasing the ink capacity of the ink container and reducing the accumulation of ink at the front end of the writing instrument, the ink inducing portion 14b extending along a central axis and the ink inducing portion A pen member 14 having a 14b is housed in the front outer cylinder 10, and a writing unit 18 is provided on the front end of the ink guide portion 14b so as to contact it, and at the rear portion of the front outer cylinder 10. The ink container 22 containing the low viscosity ink is connected to the formed diameter reducing portion 10c, and penetrates through the diameter reducing portion 10c to form the ink guide portion 14b and the air-ink exchange groove 14d. A communication hole 10e for communicating each rear end and the inside of the ink container 22 is formed with a diameter of 3 mm or more, and the rear end portion of the core member 14 touches the front end surface of the diameter reducing part 10c. In 1st step part 10F, it is back toward the center line in this 1st step part 10F, 2 the step portion (10f) is formed report is a second step portion (10g) and the lead member 14 structures the gap 24 is provided between dwitkkeut.

Description

Writing utensils with ink container

The present invention relates to a writing instrument such as a fountain pen, a marking pen, a sipen, an aqueous bowl pen of an ink direct supply method having an ink container containing a low viscosity ink.

As a writing instrument intended to use such a low-viscosity ink in the related art, there is a pen core member provided with an ink supply passage for supplying ink to a writing unit on which writing is made, and a gas-liquid exchange groove and an ink retention section. That is, this means that the ink in the ink receiving tank is supplied to the writing unit via the ink supply passage, and when the internal pressure in the ink receiving tank is increased and the ink is excessively supplied, the excess supplied ink moves from the ink supply passage to the ink retention section, As the internal pressure in the ink receiving tank was increased, the excess ink temporarily staying in the ink retention portion returned to the ink supply passage, so that the ink flowed down or accumulated at the end of the writing unit.

In this conventional writing instrument, since the ink supply passage for supplying ink to the writing unit, the gas-liquid exchange groove, and the ink retaining unit are used together to form a pen core member, the flow of ink and the accumulation of ink at the end of the writing unit It was difficult to completely eliminate the volume, and in order to reduce the volume, the total amount of ink in the ink container had to be around 1cc. If it becomes more than 1cc, the fountain pen will lead to a high point in the writing area at the front of the marking pen, and ink spillage will occur.In addition, when the internal pressure in the ink receiving tank is high, the ink from the ink pool or the ink retention portion at the front end of the writing area is similar. There was a problem that was pushed out and flowed down.

Therefore, the present invention was devised to solve such a problem, and it is possible to increase the ink capacity of the ink container for a writing instrument with a large amount of ink consumption, and an ink container that can reduce the phenomenon of ink accumulation at the front end of the writing unit. The purpose is to provide a writing instrument equipped.

Figure 1 is a longitudinal cross-sectional view showing an embodiment of a writing instrument equipped with the ink container of the present invention,

2 is an enlarged view illustrating main parts of FIG. 1.

* Explanation of symbols for main parts of the drawings

10: front outer cylinder 10c: diameter reducing part

10e: connecting hole 10f: first step

10g: the second staircase 12: the back outer cylinder

14: core member 14b: ink guide portion

14d: air-ink (gas-liquid) exchange groove 18: writing unit

22: ink container (ink cartridge) 24: gap

The writing instrument having the ink container designed according to the present invention for achieving the above object includes an ink guide portion which is accommodated in the front outer cylinder and the front outer cylinder and is disposed to extend along a central axis, and an ink guide portion that is radially outward from the ink guide portion. A pen core member comprising an air-ink exchange groove formed separately, a writing unit which is formed integrally or separately with the ink guide portion at the front end of the ink guide portion and installed to contact the ink guide portion, and is press-fixed or detachably connected to the front end cylinder. An ink container containing a rear outer cylinder and a diameter reducing portion formed at the rear portion of the front outer cylinder to receive a low viscosity ink, penetrating through the diameter reducing portion of the ink guide portion and the air-ink exchange groove of the core member Characterized in that the diameter of the connecting hole for communicating each rear end and the inside of the ink container is 3mm or more. It is structured.

On the other hand, the front end face of the diameter reducing portion is formed with a first stepped portion to reach the rear end portion of the core member and a second stepped portion which is located toward the center axis line from the first stepped portion and penetrated to the rear side, and the second stepped portion and A gap is provided between the rear ends of the core members.

In this way, the lead member is composed of an ink guide portion and an air-ink exchange groove separated from the ink guide portion, so that supply and storage of ink are independently performed, so that the ink at the front end of the writing unit is increased even if the total amount of ink is increased. It is possible to reduce the amount of sticking and dropping or the ink being pushed out of the ink retention portion.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a longitudinal cross-sectional view showing an embodiment of a writing instrument having an ink container according to the present invention, wherein reference numeral 10 in the figure is a front outer cylinder, and a pen core member 14 is installed in the front outer cylinder 10. have.

The core member 14 is provided with a center tube 14a at its center portion, and is provided with an ink guide portion 14b that penetrates the center tube 14a and extends along the center axis thereof. A comb-shaped portion 14c is provided on the outer periphery of the ink, so that the ink guide portion 14b and the comb-shaped portion 14c are separated from each other by the center tube 14a. The comb-shaped portion 14c is wider than the narrow gas-liquid exchange groove 14d extending in the axial direction and the air-ink exchange groove 14d and is gradually stepped in width while going forward in the axial direction. The ink retention portion 14e is formed to be widened. In addition, the writing portion 16 is press-fitted to the inner circumference of the front end of the lead member 14. A plurality of ribs 16a are formed on the outer circumference of the writing portion supporting member 16, and the writing portion supporting member 16 is formed. A gap formed between the plurality of ribs 16a positioned between the outer circumference of the core and the inner circumference of the core member 14 to form the air flow hole 16b, and the air flow groove 14f communicating the ink reservoir 14e. ) To communicate with.

In addition, the writing unit 18 is held on the inner periphery of the writing unit support member 16, and an ink guide unit through which the rear end of the writing unit 18 penetrates the inner hole of the writing unit support member 16 ( Contact with the front end of 14b). In this embodiment, although the writing unit 18 is constituted separately from the ink inducing unit 14b, the writing unit 18 and the ink inducing unit 14b may be integrally formed.

A male thread portion 10a is formed on the outer circumference of the rear end portion 10b of the front outer cylinder 10 to be screwed to the female thread portion 12a formed on the inner circumference of the front outer cylinder 12 so that the front outer cylinder 10 and the rear outer cylinder 12 ) Is detachably connected. However, in the present embodiment, the rear outer cylinder 12 and the front outer cylinder 10 are detachably connected, but the rear outer cylinder 12 and the front outer cylinder 12 may be press-fitted and connected.

At the rear end of the front outer cylinder 10, a diameter reduction portion 10c having a small outer diameter is formed concentrically with the rear end portion 10b on which the male thread portion 10a is formed, and these rear end portions 10b and the diameter reduction portion are formed. The front end of the ink container 22 in the form of a cartridge is inserted into the annular gap between the portions 10c so that the cartridge type ink container 22 is connected to the outer circumference of the diameter reducing portion 10c. That is, at the rear end of the diameter reduction part 10c, a sharp pointed part 10d is formed, and this sharpened part 10d penetrates the stopper 22b of the ink container 22 so that the ink container 22 is formed. It is supposed to go inside. Here, the ink container 22 may be connected to and detachably attached to the diameter reducing portion 10c so as to be exchanged, or may be fixedly connected to the diameter reducing portion 10c by indentation.

The ink container 22 is adapted to receive a low viscosity ink, and a plurality of axially extending ribs 22a are formed on the inner circumferential surface thereof, so that ink is difficult to move within the ink container 22 by surface tension. It is to be prevented.

The connecting hole 10e which penetrates the inside of the diameter reduction part 10c is comprised so that the diameter may be 3 mm or more, and the inside of the ink container 22, the ink guide part 14b of the core member 14, and the air-ink Each rear end of the exchange groove 14d is made to communicate. In addition, the front end surface of the diametrically axial part 10c is located at the center axis side than the first step portion 10f and the first step portion 10f to which the rear edge portion of the core member 14 touches, and is dug backwards. The 2nd step part 10g which entered was formed. That is, in the state where the core member 14 is prevented from moving backward by the 1st step part 10f, it press-fits in the front outer cylinder 10, and is fixed, so that the 2nd step part 10g and the core member 14 may be carried out. A gap 24 is formed between the rear ends.

Reference numeral 30 denotes a cap, which cap 30 is integral with the clip, and the body 32, the covering body 33 disposed in the body body 32 and the covering body 33. The locking block portion (32a) formed on the inner circumferential surface of the trunk body 32 is formed of a spring 34 for pushing the side toward the writing unit 18, and formed on the outer circumferential surface of the front outer cylinder 10 ( 10h), the cover body 33 is pushed in a state in which the cap 30 is completely attached to the front outer cylinder 10, and the inside of the distal end thereof comes into close contact with the writing unit supporting member 16, thereby providing a writing unit ( 18 and the air flow hole 16b are blocked from the outside air to prevent evaporation of ink from the writing unit 18 and the air flow hole 16b.

By the above configuration, the ink in the ink container 22 is supplied to the writing unit 18 via the ink induction unit 14b.

In addition, the pressure drop in the ink container 22 accompanying the ink consumption is prevented by the air flow hole 16b via the gas-liquid exchange groove 14d, and the ink container 22 due to air pressure change or temperature rise is prevented. In addition to preventing the increase in pressure in the ink container, when the pressure in the ink container 22 rises, excess ink is discharged from the air-ink replacement groove 14d and stored in the ink retention portion 14e.

In this case, since the ink supply passage and the air-ink replacement groove 14d are separated from each other, the ink flows to the front end of the writing unit 18 even if the total amount of ink increases, or the ink retention unit ( In 14e), less ink is pushed out.

Since the diameter of the connection hole 10e connecting the ink guide portion 14b and the gas-liquid exchange groove 14d and the ink container 22 is set to be 3 mm or more, the connection hole 10e at the time of writing. It is easy to enter air and ink alternately. In addition, a gap 24 is provided between the second stepped portion 10g formed in the diameter reducing portion 10c and the rear end of the pen core member 14, so that the ink guide portion 14b and the air-ink exchange groove 14d are provided. The ink is spread evenly on each rear end surface so that the weight of the ink is evenly applied. Thus, the ink can be moved to the air-ink change groove 14d to serve as an air-ink change valve, so that the writing unit 18 is saturated with the required ink, and the air-ink change groove 14d As the balance between the width and the capillary suction force of the writing unit 18 does not allow more air to enter the ink container 22, the writing unit 18 does not absorb ink so as to pass through the saturation state. The accumulation of ink on the front end of the writing unit 18 can be prevented.

On the other hand, when the diameter of the connection hole 10e is smaller than 3 mm, it is difficult for the air in the connection hole 10e to be exchanged with ink, so that a layer of air is likely to stay in the connection hole 10e, thereby capillary suction force. More ink is absorbed to this large ink guide portion 14b. And if the clearance gap 24 is not provided between the 2nd step part 10g and the pen core member 14, the self weight of ink will not be added uniformly to the back end of the pen core member 14, and the connection hole 10e If there is a layer of air, the ink does not move to the air-ink exchange groove 14d, so that it does not function as an air-ink exchange valve, which inevitably causes air to enter the ink container 22, As a result, the writing portion 18 passes through the saturation state, and ink is accumulated at the front end of the writing portion 18. When the internal pressure in the ink container 22 is increased, the above-described phenomenon similarly occurs, and the amount of pressurized ink is transferred to the ink guide portion 14b having a strong capillary suction force and is placed at the front end of the writing portion 18. Ink sticking phenomenon is likely to occur.

In this embodiment, such a phenomenon that ink is accumulated at the front end of the writing unit 18 is prevented, so that stable writing can be performed.

As described above, according to the present invention, even if the total amount of ink is increased, ink clogging occurs at the front end of the writing unit, and the dropping of the ink may occur or the ink may be less pushed out of the ink retention unit.

In addition, the layer of ink and the ink can be easily replaced in the connection hole when writing, so that the ink-replacement groove can act as an exchange valve between the ink and the air so that the required ink can be saturated. In addition, as the balance between the width of the air-ink change groove and the capillary suction force of the writing portion prevents air from entering the ink container more than necessary, the writing portion does not absorb the ink beyond the saturation state, so that at the end of the writing portion Accumulation of ink can be prevented, allowing safe writing.

In addition, since the ink weight is uniformly applied to each of the ink guide portion of the lead member and the rear end face of the air-ink exchange groove, the ink can act as an air-ink exchange valve of the air-ink exchange groove, so that the required ink saturation state In addition, the balance between the width of the air-ink exchange groove and the capillary suction force of the writing portion prevents air from flowing into the ink container so that the writing portion absorbs the ink beyond the saturation state. By not doing so, ink sticking phenomenon of the front end of the writing unit does not occur, and stable writing can be performed.

Claims (2)

The front outer cylinder 10, the ink guide portion 14b that is stored in the front outer cylinder 10 and disposed to extend in the center axis line, and is separated from the ink guide portion 14b in a radially outer side than the ink guide portion 14b. A pen lead member 14 having an air-ink exchange groove 14d, and a writing portion provided to be in contact with the ink guide portion 14b integrally or separately with the ink guide portion 14b at the front end of the ink guide portion 14b ( 18) connected to the rear outer cylinder 12 which is press-fitted to the front outer cylinder 10 so as to be fixed or detachable, and the diameter reducing portion 10c formed at the rear portion of the front outer cylinder 10 to form a low viscosity ink. An ink container 22 for accommodating, penetrates through the inside of the diameter reducing portion 10c, and each rear end of the ink guide portion 14b and the air-ink exchange groove 14d of the lead member 14 and the ink. Characterized in that the diameter of the connecting hole 10e for connecting the inside of the receiving cylinder 22 is 3 mm or more. Writing is with ink storage container. The method of claim 1, wherein the first step portion (10f) and the first step portion (10f) that the rear end portion of the core member 14 is in contact with the front end of the diameter reduction portion (10c) and located closer to the center axis line The ink container, characterized in that the second stepped portion 10g which is dug to the rear side is formed so that the second stepped portion 10g and the core member 14 are provided with a gap 24 between the rear end. Featuring writing instruments.