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CN-121986027-A - Writing tool

CN121986027ACN 121986027 ACN121986027 ACN 121986027ACN-121986027-A

Abstract

The writing instrument (10) is provided with a shaft tube (15), a pen point member (50) having a writing portion (52) for forming handwriting, a holding member (70) which is mounted on the shaft tube (15) and holds the pen point member (50), the holding member (70) having a plurality of ribs (71) which protrude inward to be in contact with the pen point member (50), a plurality of claw portions (80) which extend rearward and are arranged outside the pen point member (50), the claw portions (80) being deformed inward to be in contact with the pen point member (50) in a state in which the holding member (70) is mounted on the shaft tube (15), and movement of the pen point member (50) in the axial direction (da) relative to the holding member (70) being restricted.

Inventors

  • DAISUKE SAKAMOTO
  • HARADA KOH

Assignees

  • 株式会社百乐

Dates

Publication Date
20260505
Application Date
20240920
Priority Date
20230922

Claims (14)

  1. 1. A writing instrument, characterized by comprising: A shaft cylinder; a pen point part having a writing part for forming handwriting; A holding member which is attached to the shaft tube and holds the pen point member, The holding member has a plurality of ribs protruding inward and contacting the tip member, a plurality of claw portions extending rearward and disposed outside the tip member, In a state where the holding member is attached to the shaft tube, the claw portion deforms inward to come into contact with the nib member, and movement of the nib member in the axial direction with respect to the holding member is restricted.
  2. 2. The writing instrument of claim 1, wherein the writing instrument is configured to, The ribs extend linearly in the axial direction.
  3. 3. The writing instrument of claim 1, wherein the writing instrument is configured to, More than 3 claw parts are provided.
  4. 4. The writing instrument according to claim 1, comprising: a shaft cylinder side inclined surface provided on an inner surface of the shaft cylinder and extending to an inner side along with the rearward direction; And/or a claw portion inclined slope provided on an outer surface of the claw portion so as to extend inward as going rearward.
  5. 5. The writing instrument of claim 1, wherein the writing instrument is configured to, The claw portion is provided with a protruding portion formed on an outer surface of the claw portion.
  6. 6. The writing instrument of claim 1, wherein the writing instrument is configured to, The holding member is provided with an inner inclined surface provided on an inner surface of the claw portion, and extends so as to be directed outward with the holding member being directed rearward in a state where the holding member is not attached to the shaft tube.
  7. 7. The writing instrument of claim 1, wherein the writing instrument is configured to, Comprises a locking part arranged on the outer surface of the holding part, a locked part arranged on the inner surface of the shaft cylinder, The locking portion is locked to the locked portion in a state where the holding member is attached to the shaft tube.
  8. 8. The writing instrument of claim 7, wherein the writing instrument, The locking portion is located forward of the claw portion.
  9. 9. The writing instrument of claim 7 or 8, wherein, When the holding member is attached to the shaft tube from the front, the engagement portion engages with the engaged portion after the movement of the nib member in the axial direction with respect to the holding member is restricted by the claw portion.
  10. 10. The writing instrument of claim 1, wherein the writing instrument is configured to, The minimum distance between two of the claw portions adjacent in the circumferential direction is smaller than the maximum thickness in the radial direction of the claw portion.
  11. 11. The writing instrument of claim 1, wherein the writing instrument is configured to, The minimum distance between two of the claw portions adjacent in the circumferential direction is smaller than the minimum thickness in the radial direction of the claw portion.
  12. 12. Writing instrument according to claim 10 or 11, characterized in that, The holding member has a bulge portion that reduces a distance between two of the claw portions adjacent in the circumferential direction.
  13. 13. The writing instrument of claim 1, wherein the writing instrument is configured to, The holding member has a main body portion and the claw portion extending from the main body portion, The holding member has a thick wall portion formed in the main body portion, The thickness of the thick-walled portion in the radial direction is larger than the minimum distance between two of the claw portions adjacent in the circumferential direction.
  14. 14. The writing instrument of claim 13, wherein the writing instrument is configured to, The rib constitutes the thick-walled portion, The ribs are arranged in an axial direction with gaps formed between adjacent two of the claw portions when the holding member is viewed from the radial direction.

Description

Writing tool Technical Field The present invention relates to writing instruments. Background Conventionally, writing instruments such as markers having a tip member formed of a fiber tip and the like have been known. In such writing instruments, the nib member is fixed to the barrel via a holding member or the like. Thus, when a user holds the barrel to write, the nib is prevented from being immersed in the barrel due to the pen pressure to prevent writing. As a method of fixing the nib member to the holding member or the shaft barrel, a technique is known in which a rib for press-fixing the nib member is provided on the inner surface of the holding member or the shaft barrel. JP2019-155879A describes a writing instrument provided with a holding member for holding a nib member, wherein a plurality of ribs are formed on the inner surface of the rear end portion of the holding member, and the nib member is press-fitted into the ribs. As another method for fixing the pen point member to the holding member or the shaft tube, a technique is known in which a pin is inserted in a radial direction with respect to the pen point member and the pin is fixed to the holding member or the shaft tube. In JPH6-7987U, a writing instrument is described that includes a holder for holding a pen point member, and the pen point member and the holder are fixed by a pin penetrating from the outer circumferential direction of the holder. In the technique in which the rib is provided on the inner surface of the holding member or the shaft tube, the tip member can be fixed while suppressing an increase in the number of parts, and on the other hand, in order to firmly fix the tip member, it is necessary to greatly deform the tip member. Since the nib member is formed of a fiber nib or the like, if the nib member is greatly deformed, the deformed portion is crushed, and there is a possibility that the flow of ink in the portion is hindered. In addition, in the technique of inserting the pin into the nib member, the nib member can be firmly fixed with respect to the holding member or the shaft barrel, and the number of parts increases. In addition, when the pen point member is fixed to the holding member or the shaft tube, an additional step of inserting a pin is required. Therefore, the manufacturing cost of the writing instrument may increase. Disclosure of Invention The present invention has been made in view of such a point, and an object thereof is to provide a writing instrument capable of more firmly fixing a pen point member with a simple structure. A writing instrument (1) is provided with a shaft tube, a writing part having a writing part for forming handwriting, a holding part mounted on the shaft tube and holding the writing part, wherein the holding part is provided with a plurality of ribs protruding inwards and contacting the writing part, a plurality of claw parts extending backwards and arranged outside the writing part, the claw parts are deformed inwards and contact the writing part in a state that the holding part is mounted on the shaft tube, and the movement of the writing part relative to the holding part in the axial direction is limited. In the writing instrument according to the present invention [2], the ribs extend linearly in the axial direction in addition to the writing instrument according to the above [1 ]. The writing instrument [3] of the present invention is the writing instrument according to [1] or [2], wherein the writing instrument has 3 or more of the claw portions. The writing instrument [4] of the present invention is the writing instrument according to any one of [1] to [3], wherein the writing instrument comprises a barrel-side inclined surface provided on an inner surface of the barrel so as to extend inward as going rearward, and/or a claw-side inclined surface provided on an outer surface of the claw so as to extend inward as going rearward. The writing instrument [5] according to the present invention is the writing instrument according to any one of [1] to [4], wherein the writing instrument comprises a protruding portion formed on an outer surface of the claw portion. The writing instrument [6] of the present invention is the writing instrument according to any one of [1] to [5], wherein the writing instrument includes an inner inclined surface provided on an inner surface of the claw portion, and the inner inclined surface extends so as to be directed rearward and outward in a state where the holding member is not attached to the shaft tube. The writing instrument [7] of the present invention is the writing instrument according to any one of [1] to [6], wherein the writing instrument comprises a locking portion provided on an outer surface of the holding member, and a locked portion provided on an inner surface of the shaft tube, and the locking portion is locked to the locked portion in a state where the holding member is attached to the shaft tube. In the writing instrument accordin