JP2022002878A - Writing instrument - Google Patents

Abstract

To prevent ink from adhering to the outer peripheral surface of the barrel.SOLUTION: The writing instrument includes a fitted member and a writing instrument main body 1 that is inserted and removed from the fitted member. The writing ink stored in a barrel 10 of the writing instrument main body 1 is discharged from a writing portion 30 on the front end side of the barrel 10. The fitted member is provided with a writing portion introduction cylinder portion 52c that fits in an annular shape on the front end side of the writing instrument main body 1. An annular recess 11c that is recessed away from the inner peripheral surface of the writing portion introduction cylinder portion 52c is provided at a position inside the writing portion introduction cylinder portion 52c on the outer peripheral surface of the writing instrument main body 1.SELECTED DRAWING: Figure 2

Description

The present invention relates to a writing instrument in which the writing ink stored in the barrel is discharged from the writing portion on the front end side of the barrel.

Conventionally, in this type of writing instrument, when the writing ink in the barrel is consumed, if the front end side of the writing instrument body is inserted into the ink replenishing tool (fitting member), the ink replenishing tool can be used in the writing instrument body. Some are designed to be replenished with ink.
As described in Patent Document 1, for example, the ink replenishing tool includes a container for accommodating replenishing ink, a marking pen insertion port formed in a part of the container, and a cylinder extending from the insertion port into the container. It is provided with a fitting portion and a holding cylinder, and an ink absorber inserted into the bottom side of the holding cylinder, and the ink absorber is brought into contact with the pen tip of a marking pen inserted from the insertion port to charge ink. I try to replenish it.

Japanese Patent Application Laid-Open No. 09-052490

By the way, according to the above-mentioned prior art, when the marking pen (writing tool main body) is inserted into the holding cylinder, the pen tip of the marking pen touches the inner peripheral surface of the tubular fitting portion and ink is applied to the inner peripheral surface. The ink may adhere to the ink and transfer to the front end side of the barrel of the marking pen, and the ink may stain the gripped hand.

In view of such problems, the present invention has the following configurations.
It is a writing instrument that includes a fitting member and a writing instrument main body that is inserted and removed from the fitting member, and discharges writing ink stored in the shaft cylinder of the writing instrument main body from a writing unit on the front end side of the shaft cylinder. The fitted member is provided with a writing portion introduction cylinder portion that fits in an annular shape on the front end side of the writing instrument main body, and the writing portion introduction cylinder portion is internally located on the outer peripheral surface of the writing instrument main body. A writing instrument characterized in that an annular recess is provided so as to be separated from the inner peripheral surface of the writing instrument introduction cylinder.

Since the present invention is configured as described above, it is possible to prevent ink from adhering to the outer peripheral surface of the barrel.

It is a perspective view which shows an example of the writing instrument which concerns on this invention, (a) shows the state which the writing instrument main body is attached to the ink replenishing tool, (b) is the state before the writing instrument main body is attached to the ink replenishing tool. It is a full cross-sectional view which shows the aspect which omitted the engagement / disengagement operation part in the writing tool which concerns on this invention. It is a full sectional view which shows the other example of the writing instrument which concerns on this invention.

In this embodiment, the following features are disclosed.
The first feature is that it includes a fitting member and a writing instrument main body that is inserted and removed from the fitting member, and the writing ink stored in the shaft cylinder of the writing instrument main body is discharged from the writing portion on the front end side of the shaft cylinder. In the writing instrument as described above, the fitted member is provided with a writing portion introduction cylinder portion that fits in an annular shape on the front end side of the writing instrument main body, and is inherent in the writing portion introduction cylinder portion on the outer peripheral surface of the writing instrument main body. An annular recess is provided at the position where the writing portion is introduced so as to be separated from the inner peripheral surface of the writing portion introduction cylinder portion (see FIGS. 1 to 3).

The second feature is that the annular recess is formed into a concave curved surface in a vertical cross section (see FIGS. 1 to 3).

The third feature is an ink replenishing tool in which the fitted member supplies the internal replenishing ink to the writing unit inserted into the writing unit introduction cylinder (see FIGS. 1 and 2).

The fourth feature is a cap in which the fitted member covers the front end side of the writing tool main body (see FIG. 3).

<First embodiment>
Next, a specific embodiment having the above characteristics will be described in detail with reference to the drawings.
FIG. 1 shows an example of a writing instrument according to the present invention.
The writing instrument A includes an ink replenishing tool 2 as a fitting member and a writing instrument main body 1 to be inserted and removed from the ink replenishing tool 2, and the writing ink stored in the shaft cylinder 10 of the writing instrument main body 1 is stored in the shaft cylinder. 10 Discharge from the writing unit 30 on the front end side.

The writing instrument main body 1 is supported by a shaft cylinder 10 that can be inserted into and removed from the writing unit introduction cylinder portion 52c of the ink replenishing tool 2, a core 20 housed in the shaft cylinder 10, and the front end side of the shaft cylinder 10 for writing. It is provided with a writing unit 30 for ejecting ink for ink, and constitutes, for example, a felt-tip pen, a marker pen, or the like.

In FIG. 1, reference numeral 40 is an engagement / disengagement operation unit 40 that releases the fitting state between the shaft cylinder 10 and the writing unit introduction cylinder portion 52c by the operation of bending the bending piece portion 43. The engagement / disengagement operation unit 40 can be omitted, and FIG. 2 shows an embodiment in which the engagement / disengagement operation unit 40 is omitted.

The shaft cylinder 10 integrally includes a front shaft 11 and a bottomed tubular rear shaft 12 connected to the rear end side of the front shaft 11, and is inserted into and fitted to the writing portion introduction cylinder portion 52c. (See FIG. 2).
Examples of the shaft cylinder 10 include a mode consisting of a single cylindrical member, a mode having a removable tail plug at the rear end of the tubular member, a mode consisting of three or more tubular members, and the like. Is possible.

The front shaft 11 is formed in a cylindrical shape with front and rear ends opened. On the inner peripheral surface on the front end side of the front shaft 11, a writing portion support portion 11a that projects in the inward direction to support the writing portion 30 is provided.
On the outer peripheral surface of the front shaft 11, a regulation step portion 11b for restricting the forward movement of the writing tool main body 1 by contact with the ink replenishing tool 2 is provided.

Further, the position inside the writing portion introduction cylinder portion 52c, which is on the front side of the regulation step portion 11b on the outer peripheral surface of the front shaft 11, and is located inside the writing portion introduction cylinder portion 52c, is set away from the inner peripheral surface of the writing portion introduction cylinder portion 52c. An annular recess 11c that is recessed inward in the radial direction of the shaft tube is provided.
Then, below the annular recess 11c on the outer peripheral surface of the front shaft 11, an annular overpass fitting projection 11d is provided so as to get over and fit the engaging / disengagement projection 52c21 in the writing portion introduction cylinder portion 52c downward. Be done.

The annular recess 11c is formed in a concave curved surface in a vertical cross section over the entire circumference of the barrel 10.
A gap s is secured between the outer peripheral surface of the annular recess 11c and the inner peripheral surface of the writing portion introducing cylinder portion 52c, which will be described later.

The core 20 contains a large number of synthetic fibers in a thin cylinder made of synthetic resin and is impregnated with writing ink, and is sometimes referred to as batting.
The core 20 may be in the form of a tank for storing ink without having the synthetic fiber. It is also possible to omit the core 20 and store the ink directly in the barrel 10.

The rear end of the writing unit 30 is press-fitted into the front end of the core 20, and the writing ink impregnated in the synthetic fiber of the core 20 is guided forward by capillary force. The writing portion 30 is formed by forming a porous resin having continuous pores in a bullet shape, and is in contact with the second ink derivative 70 in the ink replenishing tool 2. As another example of the writing portion 30, it is also possible to have a mode in which a large number of synthetic fibers are converged in a substantially axial shape, a mode in which the lower end portion is diagonally cut, and the like.

The ink replenisher 2 is a fitting member that can be fitted and detached from the writing tool main body 1.
The ink replenisher 2 is composed of an ink container 50 having a writing unit introduction cylinder portion 52c, first and second ink derivatives 60 and 70, and replenishment ink stored in the ink container 50. The second ink derivative 70 is brought into contact with the writing portion 30 inserted into the writing portion introduction cylinder portion 52c of the writing portion 50 to replenish the replenishing ink.

The ink container 50 has a bottomed cylindrical female side tubular member 51 having an opening on one end side (upper end side according to FIG. 2) and a bottomed tubular member 51 having an opening on the opposite end side (lower end side). The male side cylindrical member 52 is provided. In this ink container 50, the opening side of the male side tubular member 52 is inserted and screwed into the opening side of the female side tubular member 51, and the male side tubular member 52 is placed on the upper side of the female side tubular member 51. It is placed in. The male side tubular member 52 is provided with an insertion port 52a1 for inserting the writing tool main body 1, and the female side tubular member 51 stores ink below the second ink derivative 70. ..

The female-side tubular member 51 is formed in a bottomed tubular shape in which the lower end side of the peripheral wall 51b having an upper opening is closed by the bottom wall portion 51a.

In FIG. 2, reference numeral 51c is a support portion that supports the first ink derivative 60, and reference numeral 51b1 is a plurality of vertical ribs that serve as a guide for the ink surface position.

The male side tubular member 52 has a cylindrical peripheral wall 52b that opens downward, an upper bottom portion 52a that covers the upper end portion of the peripheral wall 52b, and an upper bottom portion 52a that extends downward from the center side of the upper bottom portion 52a and has an ink surface at the lower end portion thereof. It is integrally provided with a writing portion introduction cylinder portion 52c that is in contact with the upper surface of the second ink derivative 70 on the upper side.

The upper bottom portion 52a is formed in a substantially disk shape, and its peripheral edge portion is connected to the upper end of the peripheral wall 52b. On the center side of the upper bottom portion 52a, a writing portion introduction cylinder portion 52c is provided so as to project downward.

The writing unit introduction cylinder portion 52c is formed in a substantially cylindrical shape having an internal space continuous in the vertical direction so as to fit in an annular shape on the front end side of the writing instrument main body 1.
The writing portion introduction cylinder portion 52c is located on the center line of the ink container 50, its upper end is connected to the upper bottom portion 52a to open, and the opening at the lower end thereof is in contact with the second ink derivative 70 (FIG. 2).
More specifically, the writing portion introduction cylinder portion 52c is a substantially mortar-shaped concave cylinder portion 52c1 that receives the regulation step portion 11b of the shaft cylinder 10, and extends downward from the center side of the concave cylinder portion 52c1. It integrally has a cylindrical portion 52c2 and a diameter-reduced tubular portion 52c3 that is reduced in diameter and extends downward with respect to the cylindrical portion 52c2.

The cylindrical portion 52c2 is provided in a range that covers the annular recess 11c of the shaft cylinder 10 and the overcoming fitting projection 11d. A substantially cylindrical gap s extending in the vertical direction is secured between the cylindrical portion 52c2 and the annular recess 11c.

Further, a plurality (two according to the illustrated example) of the first ink derivative 60 are vertically provided on the bottom side of the female side cylindrical member 51 at intervals in the horizontal direction.
Each first ink derivative 60 is formed in a columnar shape from a porous resin having a large number of continuous pores, and the lower end side is immersed in the ink and the upper end side is projected upward from the ink surface to form a second ink. It is pressed against the derivative 70.

The second ink derivative 70 is a fiber convergent body formed by converging a large number of fibers into a plate shape (rectangular plate shape according to the illustrated example), and is formed on the first ink derivative 60 on the upper side of the ink surface. On the other hand, it touches from the upper side and touches the lower end side of the writing section 30 inserted into the writing section introduction cylinder section 52c. Then, the second ink derivative 70 replenishes the writing unit 30 with the ink sucked from the first ink derivative 60 by the capillary force.
At the center of the second ink derivative 70, upper and lower parts are connected so as to communicate the inside of the writing portion introduction cylinder portion 52c and the space below the second ink derivative 70 and above the ink surface. A circular ventilation hole 71 penetrating in the direction is provided.

Therefore, according to the writing instrument A having the above configuration, in a state where the writing instrument main body 1 is inserted into the ink replenishing tool 2 (fitting member), the outer peripheral surface of the writing instrument main body 1 on the front end side and the writing unit introduction cylinder of the ink replenishing tool 2 A substantially tubular gap s extending in the vertical direction is secured between the portion 52c and the portion 52c.
Therefore, for example, when the writing instrument main body 1 is inserted into the ink replenishing tool 2, even if the writing unit 30 touches the writing unit introduction cylinder portion 52c and the writing unit introduction cylinder portion 52c is contaminated with ink, this ink will be used. It is possible to prevent the writing instrument main body 1 from adhering to the outer peripheral surface on the front end side, and further prevent the hand holding the front end side of the writing instrument main body 1 from becoming dirty.

<Second embodiment>
Other embodiments according to the present invention will be described. Since the embodiment shown below is a modification of a part of the writing tool A, the modified portion will be mainly described in detail, and the same parts will be designated by the same reference numerals and detailed description thereof will be omitted.

The writing tool B shown in FIG. 3 is the writing tool A in which the ink replenishing tool 2 is replaced with a cap 3 as a fitting member.

The cap 3 includes a bottomed tubular writing portion introduction cylinder portion 3a that covers the front end side of the writing instrument main body 1, an airtight cylinder portion 3b that protrudes rearward from the bottom portion (front end wall) of the writing portion introduction cylinder portion 3a, and writing. A clip portion 3c connected to the outer peripheral surface of the portion introduction cylinder portion 3a is integrally provided.

The writing portion introduction cylinder portion 3a is formed in a bottomed cylindrical shape that covers a portion (specifically, an annular recess 11c, a riding over fitting protrusion 11d, etc.) on the front side of the regulation step portion 11b of the writing instrument main body 1.
On the inner peripheral surface of the writing portion introduction cylinder portion 3a, a engagement / disengagement protrusion 3a1 that engages with and disengages from the riding over fitting projection 11d on the shaft cylinder 10 side is provided.

The airtight cylinder portion 3b is formed in a cylindrical shape in the writing portion introduction cylinder portion 3a so as to cover the portion in front of the riding over fitting protrusion 11d of the writing instrument main body 1, and is airtight over the entire circumference with respect to the front end side portion of the front shaft 11. Fits in.

Therefore, according to the writing instrument B having the above configuration, in a state where the writing instrument main body 1 is inserted into the cap 3 (fitting member), the outer peripheral surface of the writing instrument main body 1 on the front end side and the writing portion introduction cylinder portion 3a of the cap 3 A substantially tubular gap s extending in the vertical direction is secured between them.
Therefore, for example, even if the writing unit 30 touches the inner peripheral surface of the writing unit introduction cylinder 3a when the cap 3 is attached to the writing instrument main body 1, ink adheres to the inner peripheral surface of the writing instrument introduction cylinder 3a. It is possible to prevent this ink from transferring to the outer peripheral surface on the front end side of the writing instrument main body 1, and further prevent the hand holding the front end side of the writing instrument main body 1 from becoming dirty.

According to the above embodiment, as a particularly preferable example, the annular recess 11c is formed into a concave curved surface in a vertical cross section, but as another example, the annular recess is formed into a stepped concave shape in a vertical cross section, or a concave portion other than the illustrated example. It can be shaped.

Further, the present invention is not limited to the above-described embodiment, and can be appropriately changed without changing the gist of the present invention.

1: Writing tool body 2: Ink replenishing tool (fitting member)
3: Cap (fitted member)
10: Shaft cylinder 11: Front shaft 11c: Circular recess 12: Rear shaft 30: Writing part 52c, 3a: Writing part introduction cylinder part

Claims (4)

It is a writing instrument that includes a fitting member and a writing instrument main body that is inserted and removed from the fitting member, and discharges writing ink stored in the shaft cylinder of the writing instrument main body from a writing portion on the front end side of the shaft cylinder. hand,
The fitted member is provided with a writing portion introduction cylinder portion that fits in an annular shape on the front end side of the writing instrument main body.
A writing instrument characterized in that an annular recess is provided at a position inside the writing portion introduction cylinder portion on the outer peripheral surface of the writing instrument main body so as to be separated from the inner peripheral surface of the writing portion introduction cylinder portion. The writing tool according to claim 1, wherein the annular recess is formed in a concave curved surface in a vertical cross section. The writing instrument according to claim 1 or 2, wherein the fitted member is an ink replenishing tool that supplies an internal replenishing ink to the writing unit inserted into the writing unit introduction cylinder portion. The writing tool according to claim 1 or 2, wherein the fitted member is a cap that covers the front end side of the writing tool main body.

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