JP2006015561A - Ball-point pen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably reduce a flip sound, which is generated when a core body of a ball-point pen is returned into a barrel again after the use of the ball-point pen, for a long period of time by using an impact-sound reducing member prevented from coming off and being inclined. <P>SOLUTION: The core body 3 of the ball-point pen 1 is urged backward by a coiled spring 10. The impact-sound reducing member 13 reduces an impact sound which is generated when the core body 3 in a use state is returned into the barrel 2 again after the use. The member 13 is attached to the barrel 2 by firmly fitting an attachment part 15 with a diameter-enlarged part 15a, provided in the rear of the member 13, into an attachment hole 17 provided at the inside back end of the barrel 2. A knob part 16 is protrusively provided in the front part of the member 13. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a ball-point pen, and more particularly to a ball-point pen that reduces the impact sound that occurs when a ball-point pen core in use is returned to the shaft after use.

  When using the ballpoint pen, the front end of the ballpoint pen core protrudes from the front end opening of the tip attached to the front end of the shaft tube, and after use, the ballpoint pen core is returned to the shaft tube again. In general, it is widely used in order to prevent the paper surface and clothes from being soiled by ink when not in use.

  However, since the urging force of the coil spring is used when the ballpoint pen core body is returned into the shaft cylinder after use, the rear end portion of the operation member attached to the rear end of the ballpoint pen core body is When the impact sound is generated frequently, it will sound unexpectedly in a quiet environment such as a conference or training hall, and may be used by a ballpoint pen user. In the beginning, people around you may be worried.

  As a countermeasure, for example, in Patent Document 1, FIG. 9 shows a front view of a partially broken ballpoint pen, and FIG. 10 shows an enlarged view of a main part thereof. A hemispherical rubber tip (04) is inserted into the recess (03) at the rear end, and an operation member (attached to the rear end of the ballpoint pen core (05) is attached to the peripheral portion (04a) of the rubber tip (04) ( (06) A rear end portion (06a) is disclosed.

However, what is described in Patent Document 1 is a rubber chip that is simply a hemispherical rubber chip (04) inserted into the recess (03) at the inner rear end of the shaft cylinder (02) of the ballpoint pen (01). (04) is not only likely to drop off, but also because multiple ballpoint pen cores (05) in a multicolor ballpoint pen are not used at the same frequency, the operation that is attached to the rear end of the ballpoint pen core (05) The frequency with which the rear end portion (06a) of the member (06) collides with the peripheral edge portion (04a) of the rubber chip becomes non-uniform, and the rubber chip (04) may gradually be inclined and become unusable.
Japanese Utility Model Publication No. 6-68883 (see claim 1 and FIG. 2)

  In view of the above-mentioned conventional situation, the present invention prevents the impact noise generated when the ball tip core body is returned into the shaft cylinder without dropping or tilting the rubber chip as the impact sound reducing member over a long period of time. An object of the present invention is to provide a ballpoint pen that can be stably and satisfactorily reduced.

The above-described problems are solved by the invention having the following configuration, as shown in each of the claims.
(1) An operation member is attached to the rear end of the ballpoint pen core housed in the shaft tube, and the operation portion of the operation member is exposed to the outside through a slide hole provided in the peripheral wall of the shaft tube, and the operation portion is operated. By doing so, the ballpoint pen core body is urged rearward by a coil spring in the ballpoint pen which is caused to protrude and retract from the front end opening of the tip portion attached to the front end of the shaft cylinder, When the ball-point pen core body in a used state in which the front end portion is protruded from the front end opening of the front end portion is returned to the shaft cylinder again after use, the rear end portion of the operation member is A mounting hole provided at the rear end of the impact sound reducing member for reducing the impact sound generated when colliding with the locking portion of the cylinder is provided at the inner rear end of the shaft cylinder. By fitting, a ball-point pen attached to the barrel.

  (2) In the above item (1), the impact sound reducing member is provided so that the rear end portion of the operation member abuts on the rear surface and the rear surface of the operation member in the state where the ballpoint pen core is housed in the shaft tube. The mounting portion is formed of an elastic material, and a part of the mounting portion is enlarged in diameter, and is firmly fitted in a mounting hole provided in the inner rear end of the shaft cylinder. Let

  (3) In the above item (1) or (2), the mounting hole provided in the inner rear end of the shaft cylinder is formed so that its inner part is wider than the opening, and the wide part is provided with the impact sound reducing member. Fit the enlarged diameter part of the mounting part.

  (4) In any one of the above items (1) to (3), the substrate in the impact sound reducing member is formed into a shape in which small pieces corresponding to the number of ball-point pen cores are arranged radially in plan view. At the same time, the small piece is locked to the inner rear end of the shaft tube so that the impact sound reducing member does not rotate.

  (5) In any one of the above items (2) to (4), a knob portion is projected from the front surface of the substrate in the impact sound reducing member toward the front.

According to the present invention, the following effects can be obtained.
According to the first aspect of the present invention, the impact sound reducing member is attached to the shaft tube by fitting the mounting portion provided at the rear part thereof to the mounting hole provided at the inner rear end of the shaft tube. Therefore, the impact sound reducing member does not fall off or tilt, and the impact sound generated when the ballpoint pen core is returned into the shaft tube can be stably and satisfactorily reduced over a long period of time.

According to the second aspect of the present invention, since the impact sound reducing member is formed of an elastic material, the rear end portion of the operation member attached to the rear end of the ballpoint pen core collides with the locking portion of the shaft cylinder. The impact noise is reduced and the impact noise is reduced well, and the expanded diameter part of the mounting part is firmly fitted into the mounting hole of the shaft tube by elastic force, so that the impact sound reducing member is removed. Is highly prevented.
Further, since both the substrate and the mounting portion of the impact sound reducing member are formed of an elastic material, the impact due to the collision of the rear end portion of the operation member propagates from the substrate to the shaft tube via the mounting portion, and the impact sound is reduced. It is also possible to effectively prevent such a negative effect on the reduction of the amount.

  According to the third aspect of the present invention, the impact noise reduction member can be more effectively prevented from falling off the shaft tube.

  According to the invention described in claim 4, since the substrate is formed by arranging small pieces corresponding to the number of ball-point pen cores radially in plan view, the impact of each small piece propagates to the adjacent small pieces. Therefore, the impact sound reducing member is advantageously prevented from rotating, and the stability of the mounting position of the impact sound reducing member is well maintained.

  According to the fifth aspect of the present invention, since the knob portion projects forward from the front surface of the substrate in the impact sound reducing member, the knob portion is attached when the impact sound reducing member is attached to the shaft tube. This makes it possible to perform the installation work efficiently.

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

  FIG. 1 is a partially cutaway front view of a ballpoint pen (1) embodying the present invention, and FIG. 2 is an enlarged view of a main part of FIG.

  In the ballpoint pen (1) of the present invention, an operation member (4) is attached to the rear end of the ballpoint pen core (3) accommodated in the shaft tube (2), and an operation portion (5) in the operation member (4) is provided. Is exposed to the outside through a slide hole (7) provided in the peripheral wall (6) of the shaft cylinder (2), and the front end (3a) of the ball-point pen core (3) is operated by operating the operation section (5). ) Can be freely projected and retracted from the front end opening (9) of the tip (8) attached to the front end of the shaft cylinder (2).

  That is, when used, the front end portion of the ball-point pen core (3) is pushed down by pushing the operation part (5) of the ball-point pen core (3) of a desired color toward the front (downward in FIG. 1). (3a) is projected to the outside from the front end opening (9) of the tip (8), and after use, by slightly depressing the operation part of the ballpoint pen core of another color, by a known mechanism, The ball-point pen core (3) is automatically returned into the shaft tube (2) by a backward biasing force (upward in FIG. 1) by the coil spring (10).

  Thus, when the ball-point pen core (3) returns into the shaft cylinder (2), the rear end portion (11) of the operating member (4) is moved by the biasing force of the coil spring (10). Impact sound is generated by colliding with the latching portion (12) at the inner rear end.

  For this reason, in the present invention, the rear end portion (11) of the operation member (4) is caused to collide with the impact sound reduction member (13) attached to the inner rear end of the shaft tube (2) to be locked. The sound is reduced as much as possible.

  FIG. 3 is an enlarged front view of the impact sound reducing member (13), and FIG. 4 is an enlarged upper perspective view. The impact noise reduction member (13) is provided with a base plate (14), a mounting portion (15) projecting rearward on the rear surface (14a), and a front projection (also facing the front surface (14b)). It consists of a knob part (16). The substrate (14), the mounting portion (15), and the knob portion (16) are all integrally formed of an elastic material.

  As the elastic material, urethane rubber, low elastic rubber, silicon rubber, fluorine rubber, nitrile rubber, butyl rubber, ethylene rubber, chloro rubber, other elastomers, and the like are preferably used.

  In particular, the substrate (14) is a portion where the rear end portion of the operating member (4) collides and is locked. In order to effectively reduce the impact sound, the hardness of the material is 30 to 95 Shore A. Hardness is desirable, especially around 90 Shore A hardness is preferably used.

  The impact sound reducing member (13) of this embodiment is used for a two-color ballpoint pen, and the substrate (14) is a rectangular plate-like body, and the thickness thereof is about 0.5 to 1.5 mm. Desirably, around 1.2 mm is particularly preferable.

  The rear part of the mounting part (15) is enlarged, and this enlarged part (15a) is an attachment hole provided in the axial direction at the inner rear end of the shaft tube (2) by the elastic action of the material. (17) The diameter is expanded to such an extent that it can be firmly fitted to (see FIG. 2).

  In the embodiment shown in FIG. 2, the diameter of the mounting hole (17) is not changed. For example, the inner part of the mounting hole (17) is formed wider than the opening, and the impact is applied to the wide part. It is also a preferable form to fit the enlarged diameter portion (15a) in the sound reducing member (13).

  The knob portion (16) provided on the front surface (14b) of the board (14) in the impact sound reducing member (13) is connected to the mounting hole (in the rear end of the shaft cylinder (2) ( 17) When engaging with 17), the front part is enlarged so that it can be easily pinched by hand or tweezers. (13) is made not to come off tweezers.

  FIG. 5 is a cross-sectional view taken along the line VV in FIG. 1, and FIG. 6 is a diagram showing that the rear end portion (11) of the operation member (4) attached to the rear end of the ballpoint pen core (3) FIG. 13 is an enlarged perspective view showing a state in contact with or separated from 13).

  As shown in FIG. 5, the impact sound attached to the shaft tube (2) is reduced by fitting a mounting portion (not shown) into a mounting hole (not shown) at the inner rear end of the shaft tube (2). The member (13) is composed of two left and right members that contact the rear end of the operation member (4) attached to the rear end of each of the two color ballpoint pen cores (not shown) constituting the substrate (14). The small pieces (14c) and (14c) are integrally formed, and each of the small pieces (14c) and (14c) has an impact sound reducing member (13) on the inner rear end surface of the shaft tube (2). It is locked so as not to rotate around the axis of 2).

  As shown in FIG. 6, step portions (11a) and (11b) are formed on the rear end portion (11) of the operation member (4) attached to the rear end of the ballpoint pen core (3), The front surface (14a) of the substrate (14) in the impact sound reduction member (13) comes into contact with the step portion (11a) that is lowered by one step in the direction. Further, the step portion (11a) is formed in a convex shape so as to reduce the contact area with the front surface (14a) of the substrate (14) in order to reduce the impact sound.

  7 and 8 are upper perspective views showing another embodiment of the impact sound reducing member, which corresponds to FIG.

The impact sound reducing member (18) shown in FIG. 7 is used for a three-color ballpoint pen, and the board (19) has three plate-shaped pieces (19a) (19b) corresponding to the three ballpoint pen cores. ) (19c) is formed in a shape arranged radially in plan view.
A mounting portion (20) and a knob portion (21) project from the rear and front surfaces of the substrate (19), respectively.

The impact sound reducing member (22) shown in FIG. 8 is used for a four-color ballpoint pen, and the board (23) has four plate-shaped pieces (23a) (23b) corresponding to the four ballpoint pen cores. ) (23c) and (23d) are similarly formed in a radially arranged shape.
A mounting portion (24) and a knob portion (25) project from the rear and front surfaces of the substrate (23), respectively.

  The impact sound reducing members (18) and (22) shown in FIGS. 7 and 8 have three and four ballpoint pen cores, respectively, in the same manner as the impact sound reducing members (13) shown in FIGS. The mounting portions (20) and (24) are fitted and mounted in mounting holes at the inner rear end of the shaft cylinder provided.

It is a front view which shows the ball-point pen which implemented this invention partially fractured | ruptured. It is a principal part enlarged view of FIG. It is an enlarged front view of the impact sound reducing member in FIG. Similarly, it is an expansion upper perspective view of an impact sound reduction member. It is the VV sectional view taken on the line in FIG. It is an expansion perspective view which shows the state which the rear-end part of the operation member attached to the rear end of the ball-point pen core contact | abuts or is discrete with the impact sound reduction member. It is an upper perspective view which shows another embodiment of an impact sound reduction member. It is an upper perspective view which shows another embodiment of an impact sound reduction member. It is a front view which shows a conventional ball-point pen partially broken. It is a principal part enlarged view of FIG.

Explanation of symbols

(1) Ballpoint pen
(2) Shaft cylinder
(3) Ballpoint pen core
(3a) Front end
(4) Operation member
(5) Operation part
(6) Perimeter wall
(7) Slide hole
(8) Mouth
(9) Opening
(10) Coil spring
(11) Rear end
(11a) (11b) Step
(12) Locking part
(13) Impact noise reduction member
(14) Board
(14a) Rear side
(14b) Front
(15) Mounting part
(15a) Expanded part
(16) Knob
(17) Mounting hole
(18) Impact noise reduction member
(19) Board
(19a) (19b) (19c) Small plate
(20) Mounting part
(21) Knob
(22) Impact noise reduction member
(23) Board
(23a) (23b) (23c) (23d) Small plate
(24) Mounting part
(25) Knob
(01) Ballpoint pen
(02) Shaft cylinder
(03) Recess
(04) Rubber chip
(04a) Perimeter
(05) Ballpoint pen core
(06) Operation member
(06a) Rear end

Claims (5)

By attaching an operating member to the rear end of the ball-point pen core housed in the shaft cylinder, exposing the operating part of this operating member to the outside through a slide hole provided in the peripheral wall of the shaft cylinder, and operating this operating part In the ballpoint pen, the front end portion of the ballpoint pen core body is projected and retracted from the front end opening of the tip portion attached to the front end of the shaft tube.
When the ball-point pen core is urged rearward by a coil spring and the ball-point pen core in a used state with the front end protruding from the front end opening of the lip is returned to the shaft cylinder again after use. The impact sound reducing member for reducing the impact sound generated when the rear end portion of the operation member collides with the locking portion of the shaft tube by the urging force of the coil spring is provided at the rear portion of the impact sound reducing member. A ballpoint pen which is attached to a shaft cylinder by fitting the provided mounting portion into a mounting hole provided in an inner rear end of the shaft cylinder.   In the state where the ballpoint pen core body is housed in the shaft tube, the impact sound reducing member is formed by a substrate with which the rear end portion of the operation member abuts and a mounting portion projecting rearward on the rear surface, 2. The substrate and the mounting portion are formed of an elastic material, and a part of the mounting portion is enlarged in diameter, and is firmly fitted into a mounting hole provided at the inner rear end of the shaft tube. The ballpoint pen described.   The mounting hole provided at the inner rear end of the shaft tube is formed so that the inner part of the mounting hole is wider than the opening, and the expanded part of the mounting part of the impact sound reducing member is fitted to the wide part. The ballpoint pen according to claim 1 or 2.   The substrate in the impact sound reducing member is formed into a shape in which small pieces corresponding to the number of ball-point pen cores are arranged radially in plan view, and the small pieces are formed on the inner rear end of the shaft tube, and the impact sound reducing member is formed. The ballpoint pen according to claim 1, wherein the ballpoint pen is locked so as not to rotate.   The ballpoint pen according to any one of claims 2 to 4, wherein a knob portion is projected from the front surface of the substrate of the impact sound reducing member toward the front.

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