JP2020055193A - Writing instrument - Google Patents

Abstract

To provide a writing instrument capable of finely expressing by flexing vicinity of a contact part with a paper surface depending on a degree of controlling a force in writing.SOLUTION: A writing instrument includes a barrel, a holding member and a writing part; an ink feeding part for feeding ink to the writing part is stored in the barrel; the holding member includes a first member, a second member and a third member; a first through-hole penetrating a front end and a rear end is formed in the first member; a second through-hole for penetrating a front end and a rear end to insert the writing part is formed in the second member; a part of the second member is positioned inside the first through-hole in a state where the first member and the second member are connected by the third member, and a length of the second member in a radial direction positioned inside the first through-hole is shorter than a length of the first through-hole in the radial direction.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a writing instrument.

  Conventionally, as a technique for inclining the tip of a writing instrument with respect to an axis, as shown in Patent Document 1, an elastic body is interposed between a shaft cylinder main body and a tip member, and depending on how force is applied during writing. A thing which bends an elastic body was known.

JP-A-2002-331789

  However, in the invention described in Patent Literature 1, the distance between the elastic body and the tip of the lip member is long, and it is not easy to bend the vicinity of the contact portion of the writing instrument with the paper surface. It was difficult.

  Therefore, an object of the present invention is to provide a writing instrument capable of finer expression by bending the vicinity of a portion in contact with the paper surface according to the degree of force applied during writing.

In order to solve the above-described problems, an embodiment of the present invention has the following configuration.
(1) First Embodiment A writing instrument according to a first embodiment of the present invention includes a barrel, a holding member attached to the barrel, and a writing unit held by the holding member. An ink supply unit that supplies ink to the writing unit is housed in the barrel, and the holding member includes a first member inserted into the barrel, a second member that holds the writing unit, and a second member. A third member that connects the two members to the first member in a tiltable manner, wherein the first member has a first through hole that penetrates a front end and a rear end, and the second member A second through hole for penetrating the front and rear ends and inserting the writing portion is formed, and in a state where the first member and the second member are connected by the third member, The radial length of the second member located inside the first through hole is the radial length of the first through hole. Shorter than the length.

(2) Second Embodiment A writing instrument according to a second embodiment of the present invention is the writing instrument according to the first embodiment, wherein the first member and the second member are made of the same material, and The member is formed of a material softer than the material of the first member and the second member.

(3) Third Embodiment A writing instrument according to a third embodiment of the present invention is the writing instrument according to the first or second embodiment, wherein the first member and the second member are separated by the third member. In the connected state, a space is formed in a part between the second member and the third member.

  According to the embodiment of the present invention, it is possible to provide a writing instrument capable of expressing more finely by bending the vicinity of a portion in contact with the paper surface by applying a force during writing.

It is the front view (A) of the writing implement which concerns on this Embodiment, II sectional drawing (B) of (A), and the front view (C) in the state which removed the cap member. It is the perspective view (A), front view (B), and II-II sectional drawing (C) of (B) of the holding member which concerns on this Embodiment. It is the figure (A) which shows the non-tilt state of the writing implement which concerns on this Embodiment, and the figure (B) which shows a tilt state. An enlarged view (A) of the tip end of the writing implement in the comparative configuration showing the initial state of the writing implement, and an enlarged view (B) of the tip end of the writing implement in the comparative configuration after the tip of the writing part is pressurized under predetermined conditions. ). An enlarged view (A) of the tip of the writing instrument showing the initial state of the writing instrument in the present embodiment, and the tip of the writing instrument in the present embodiment after the tip of the writing section is pressed under a predetermined condition. It is an enlarged view (B).

  This embodiment will be described with reference to the drawings. In the following description, the “front end side” refers to the side including the holding member 20 described later in the axial direction of the writing instrument 5, and the “rear end side” refers to the side opposite to the “front end side”.

(1) Writing implement 5
1A is a front view of a writing instrument 5 according to the present embodiment, FIG. 1B is a cross-sectional view taken along a line II of FIG. 1A, and FIG. 1C is a cap member described later. It is a front view of the writing implement 5 with 12 removed. The writing implement 5 according to the present embodiment is, for example, a felt-tip pen.

  As shown in FIG. 1 (A), the writing instrument 5 includes a shaft cylinder 10 having an opening at the tip as an external structure. A holding member 20 is attached to the opening of the barrel 10. The cap member 12 is detachably attached to the holding member 20. The cap member 12 is mounted by being press-fitted into the holding member 20 in order to increase the airtightness inside the cap member 12 in the mounted state where the cap member 12 is mounted. Then, in the mounted state, the cap member 12 and the holding member 20 are in close contact with each other (see FIG. 1B).

  As shown in FIG. 1B, an ink supply unit 14 formed of, for example, polyester fiber and impregnated with ink is accommodated inside the barrel 10. Further, the holding member 20 holds the writing unit 16 formed of, for example, polyester fiber. The writing section 16 has its tip cut obliquely with respect to the axial direction.

  When the writing section 16 is held by the holding member 20, the tip of the writing section 16 protrudes from the tip of the holding member 20, and the rear end of the writing section 16 is inserted into the tip of the ink supply section 14. . This allows the writing unit 16 to write on the sheet P (see FIG. 3) by absorbing the ink impregnated in the ink supply unit 14.

(2) Holding member 20
FIG. 2A is a perspective view of the holding member 20 according to the present embodiment, FIG. 2B is a front view of the holding member 20, and FIG. 2C is II- in FIG. 2B. It is II sectional drawing.

  As shown in FIGS. 2A and 2B, the holding member 20 is made of a first member 30 and a second member 40 of the same material, and a material softer than the material of the first member 30 and the second member 40. The third member 50 is a member formed by two-color molding.

  As shown in FIG. 2C, the first member 30 has a substantially cylindrical shape, and includes an annular contact portion 32 that comes into contact with the tip of the barrel 10 when the holding member 20 is mounted on the barrel 10. At the boundary, a front portion 34 on the distal end side of the contact portion 32 and a rear portion 36 on the rear end side of the contact portion 32 are provided. When the cap member 12 is mounted, the rear end of the cap member 12 comes into contact with the contact portion 32.

The front part 34 is a part to which the rear end part of the third member 50 is connected by two-color molding. The rear portion 36 is a portion inserted into the barrel 10 when the holding member 20 is mounted on the barrel 10.
Further, the first member 30 is formed with a first through hole 38 penetrating the front end and the rear end.

  The second member 40 is a substantially cylindrical portion, an insertion portion 42 that passes through the inside of the first through hole 38 of the first member 30, and a portion that is continuous with the tip of the insertion portion 42, and has two colors. And a connection portion 44 to which a distal end portion of the third member 50 formed by molding is connected.

  Here, as shown in FIG. 2C, the outer diameter X of the insertion portion 42 is shorter than the inner diameter Y of the first through hole 38. That is, in a state where the first member 30 and the second member 40 are connected by the third member 50, a space is formed between the insertion portion 42 and the first member 30. The space between the insertion portion 42 and the first member 30 is a tilt space 60 for the second member 40 to tilt.

  The second member 40 has a second through-hole 46 penetrating the front end and the rear end. Then, the writing portion 16 is inserted into the second through hole 46, and punching is performed at a plurality of locations around the insertion portion 42, thereby forming a projection (not shown) projecting inward. The writing portion 16 is held by the projection (not shown).

  The third member 50 is formed in a substantially truncated cone shape whose diameter gradually decreases toward the distal end. Then, by two-color molding, the front end portion of the third member 50 is connected to the second member 40 (the connection portion 44), and the rear end portion of the third member 50 is connected to the first member 30 (the front portion 34). I have.

  At this time, as shown in FIG. 2C, in a state where the first member 30 and the second member 40 are connected by the third member 50, an intermediate portion of the third member 50 is connected to the first member 30 or the second member 40. The space is not formed between the distal end portion of the insertion portion 42 and the intermediate portion of the third member 50 without being in contact with the member 40. The space between the distal end portion of the insertion portion 42 and the intermediate portion of the third member 50 is a deformation space 70 in which the third member 50 is elastically deformed.

  Since the third member 50 is configured as described above, the third member 50 connects the second member 40 to the first member 30 so as to be tiltable.

  As described above, the holding member 20 is a member formed by two-color molding. The first member 30 and the second member 40 are formed by primary molding, and the first member 30 and the second member 40 are formed. The third member 50 is integrally formed by secondary molding. The third member 50 is formed of an elastic resin material so as to be elastically deformed when the tip of the writing section 16 is pressed. In the present embodiment, in order to perform molding under a high temperature using a mold, for example, a viscoelastic material such as a thermoplastic elastomer is used as the elastic resin material. In addition, as a material of the first member 30 and the second member 40 which are the primary molded bodies, for example, a synthetic resin such as polyacetal or polypropylene resin is used.

(3) Operation and Effect In the present embodiment, the first member 30 and the second member 40 are not connected in advance, and the first member 30 and the second member 40 are first formed by two-color molding of the third member 50. Are connected. And since the 3rd member 50 is formed with an elastic resin material, when the front-end | tip of the writing part 16 is pressurized, it can tilt the 2nd member 40 by elastically deforming.

  Here, FIG. 3A shows a non-tilt state where the second member 40 is not tilted, and FIG. 3B shows a tilt state where the second member 40 is tilted.

  In the change from the non-tilted state shown in FIG. 3A to the tilted state shown in FIG. 3B, the tip of the writing unit 16 that is in contact with the paper surface P shown in FIG. Then, the third member 50 is compressed in the axial direction, and accordingly, the deformation space 70 is also compressed in the axial direction. Then, in the non-tilt state shown in FIG. 3B, the rear end of the insertion portion 42 that has not been inserted into the ink supply unit 14 is inserted into the ink supply unit 14, and the second member 40 moves relative to the first member 30. To the rear end. In the tilting state shown in FIG. 3B, the rear end of the writing unit 16 positioned at the axis of the ink supply unit 14 in the non-tilt state shown in FIG. And the rear end of the second member 40 is inclined toward the paper surface P.

  That is, in the tilted state, the second member 40 is tilted to move the second member 40 from the non-tilted state to the rear end side with respect to the first member 30 or the rear end of the second member 40 is Writing can be performed in a state of being inclined to the P side. When the pressure applied to the distal end of the writing unit 16 is released, the compression of the third member 50 in the axial direction is released, so that the tilting state shown in FIG. 3B is changed to the non-tilting state shown in FIG. Displace to state.

  In the present embodiment, the third member 50 is configured to be located near the contact portion between the tip of the writing unit 16 and the paper surface P. Specifically, in the present embodiment, the third member 50 is configured to be located further on the distal end side than the distal end of the barrel 10. Thereby, in the present embodiment, as compared with the configuration in which a member that elastically deforms is disposed at the tip of the shaft cylinder, the vicinity of the contact portion between the tip of the writing unit 16 and the paper surface P regardless of the length of the holding member 20 The third member 50 can be positioned at the second position. That is, when a member that is elastically deformed is disposed at the tip of the barrel, the distance from the paper surface P increases as the length of the member further disposed on the tip side becomes greater than the tip of the barrel, The vicinity of the tip of the writing section 16 cannot be bent.

  However, since the present embodiment is configured as described above, the writing instrument 5 capable of fine expression can be formed by bending the vicinity of the contact portion with the paper surface P by applying a force during writing. Can be provided.

  Further, since the present embodiment is configured as described above, the durability of the writing unit 16 is improved as compared with a configuration in which the tip of the writing instrument 500 does not bend (hereinafter, referred to as a “comparison configuration”). be able to.

  FIG. 4A is an enlarged view of the tip side of the writing implement 500 showing an initial state (a state in which the writing unit 160 is not pressurized) of the writing implement 500 in the comparative configuration.

  FIG. 4B shows a state in which the tip of the writing unit 160 is pressurized 1000 times with a force of 5N at a pace of once every 0.5 seconds and 0.5 times against the writing instrument 500 in the comparative configuration. It is an enlarged view. In the writing implement 500 in the comparative configuration, when the tip of the writing unit 160 is pressurized under the above conditions, the tip of the writing unit 160 is crushed, and a part thereof is warped to the rear end side.

  FIG. 5A is an enlarged view of the tip side of the writing implement 5 showing an initial state (a state in which the writing unit 16 is not pressurized) of the writing implement 5 in the present embodiment.

  FIG. 5B shows a state in which the tip of the writing unit 16 is pressurized 1000 times with a force of 5 N at a pace of once every 0.5 seconds with respect to the writing instrument 5 according to the present embodiment. It is an enlarged view of a side. In the writing instrument 5 in the present embodiment, even when the tip of the writing unit 16 is pressed under the above conditions, the tip of the writing unit 16 is hardly crushed, and is similar to the initial state shown in FIG. I keep the state.

  As described above, the writing instrument 5 in the present embodiment has less wear and deformation of the tip of the writing section 16 than the writing instrument 500 in the comparative configuration even when the tip of the writing section 16 is pressed under the above conditions. The durability of the writing unit 16 is high.

  Therefore, according to the present embodiment, wear and deformation of the tip of the writing section 16 can be reduced, and the life of the writing instrument 5 can be extended. For example, the writing implement 5 according to the present embodiment is suitable for a user who frequently applies high writing pressure during writing.

  Furthermore, since the writing instrument 5 in the present embodiment forms the holding member 20 by two-color molding of the first member 30, the second member 40, and the third member 50, members made of different materials can be effectively used. Can be connected. Then, by using the two-color molding for the holding member 20, the assembling process is largely omitted compared to a case where the two-color molding is not used, and the holding member 20 can be easily molded.

(4) Others In the above embodiment, the holding member 20 is formed by two-color molding of the first member 30, the second member 40, and the third member 50. Is not limited to two-color molding.

  In the above embodiment, it is desirable to use a material having a high water vapor barrier property as the material of the first member 30 and the second member 40. For example, polypropylene and polyethylene are examples of the material having a high water vapor barrier property. Thereby, the airtightness inside the cap member 12 can be improved, and the evaporation of the ink can be suppressed.

5 Writing implement 10 Shaft barrel 12 Cap member 14 Ink supply section 16 Writing section 20 Holding member 30 First member 32 Contact section 34 Front section 36 Rear section 38 First through hole 40 Second member 42 Insertion section 44 Connection section 46 Second penetration Hole 50 Third member 60 Tilt space 70 Deformation space

Claims (3)

A barrel,
A holding member attached to the barrel,
A writing unit held by the holding member,
With
An ink supply unit that supplies ink to the writing unit is housed in the barrel,
The holding member,
A first member inserted into the barrel,
A second member for holding the writing portion;
A third member that connects the second member to be tiltable with respect to the first member;
With
A first through hole is formed in the first member to penetrate a front end and a rear end;
In the second member, a second through hole for penetrating the front end and the rear end and inserting the writing portion is formed,
In a state where the first member and the second member are connected by the third member, a radial length of the second member located inside the first through hole is equal to a length of the first through hole. A writing instrument shorter than the radial length. The first member and the second member are made of the same material,
The writing implement according to claim 1, wherein the third member is formed of a material softer than a material of the first member and the second member.   3. The space according to claim 1, wherein a space is formed in a part between the second member and the third member when the first member and the second member are connected by the third member. 4. Writing instrument.