JP2007021795A - Knock type writing implement with string member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a knock type writing implement of which the writing end part is kept in a retracted state and prevented from being projected, on the occasion when the implement is fitted in a pocket, by a simple structure. <P>SOLUTION: The knock type writing implement with a string member is constituted by fitting the string member to the knock type writing implement wherein a refill for the writing implement is provided in a holder tube, urged in the direction of the rear end of the holder tube by a coil spring, and which has a projecting-retracting mechanism so provided in the rear end part of the holder tube that the writing end part of the refill is made projectable and retractable from the tip opening part of the holder tube by pressing a knocking body attached to the rear end opening part of the holder tube in projection therefrom. The knocking body is attached removably, while a through hole is formed in the rear end part thereof and the string member is so fitted as to pass through the through hole. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a knock type writing instrument, and more particularly to a knock type writing instrument with a string member to which a string member is attached.

  Conventionally, in a knock-type writing instrument, when the writing tip of the refill for writing instrument is sandwiched in a fabric such as a pocket in a protruding state, the refill for writing instrument, in particular, has a viscosity of 3000 mPa · In the case of a ballpoint pen refill containing oil-based ink of less than s, or ink imparted with shear thinning viscosity, there is a problem that the ink soaks into the fabric of the pocket and becomes dirty. It is eagerly desired to provide a so-called safety mechanism in which the tip portion is immersed.

  As a conventional safety mechanism, as disclosed in Japanese Patent Application Laid-Open No. 11-32182 “Knock-type writing instrument”, a locking portion formed on the engagement body that is integrated with the knock body or interlocked by the advancement of the knock body is clipped. The locking member is locked to the stopper formed on the ball part, and the locking member is released from the side of the side surface of the shaft cylinder when the pocket is mounted. The safety member is released by the biasing force of the elastic body. There is known a structure in which the writing tip is immersed in the shaft cylinder by retreating and retreating the sliding body in conjunction with the retreat of the safety member.

  The knock-type writing instrument equipped with such a safety mechanism is inserted into the pocket, so that the pocket is interposed between the clip member and the shaft tube, and the locking portion cannot be locked to the locking portion, so that the writing tip is immersed. If it is mounted in the pocket, there is also an effect that the knocking body is not accidentally pressed and the state where the writing tip is projected is not maintained.

By the way, what has attached a string member to writing instruments, such as a ball-point pen, is known like Unexamined-Japanese-Patent No. 7-40192 "part with a string." Such a writing instrument can be carried with the string member hung from the neck, and can be carried by engaging the string member with a bag or the like, thereby improving portability and convenience.
"JP-A-7-323696" "Japanese Patent Laid-Open No. 11-78356" “Japanese Utility Model Publication No. 7-40192”

  However, the structure in which the locking part formed on the knocking body or the engaging body is locked to the stopping part formed on the ball part of the clip is applied to the knocking body or the engaging body when the clip breaks for some reason such as dropping. Since the formed locking part cannot be locked to the locking part formed on the ball part of the clip and retracted by the biasing force of the coil spring, the protruding state of the writing tip part could not be maintained.

  An object of the present invention is to provide a knock writing instrument with a simple structure that maintains a state where a writing tip portion is immersed when attached to a pocket and in which the writing tip portion does not protrude in view of the conventional problems described above. That is.

  According to the present invention, the refill for the writing instrument is disposed in the shaft tube by being biased toward the rear end of the shaft tube by a coil spring, and is provided at the rear end portion of the shaft tube so as to protrude from the opening at the rear end of the shaft tube. A knock-type writing instrument with a string member formed by attaching a string member to a knock-type writing instrument having a protruding and retracting mechanism capable of protruding and retracting the writing tip of the writing instrument refill from the tip opening of the shaft tube by pressing the knock body. The knock body is detachably attached, a through hole is formed in a rear end portion of the knock body, and the string member is attached in communication with the through hole of the knock body. And

  Further, the projecting and retracting mechanism is a projecting and retracting mechanism using a rotary cam including a knock body, a push rod, a rotating cam, and a cam groove, and the string member communicates with a through hole formed in a rear end portion of the push rod. The string member is integrally formed or provided with a slip prevention portion larger than the diameter of the through hole of the push rod.

  It was possible to provide a knock writing instrument with a simple structure in which the writing tip portion was kept immersed when attached to the pocket and the writing tip portion did not protrude.

  Next, examples of the knock type writing instrument with a string member of the present invention will be described with reference to the drawings, but the present invention is not limited to the following examples.

  A knock type writing instrument 1 of Example 1 with a string member shown in FIGS. 1 to 4 has a tip at the tip of an ink containing cylinder 8 in a shaft cylinder in which a male screw portion of a front shaft 2 and a female screw of a rear shaft 3 are screwed together. A ballpoint pen tip 10 is mounted through a holder 9, a tail plug 11 is mounted at the rear end of the ink storage tube 8, and a writing tool refill 7 storing writing tool ink (not shown) inside the ink storage tube 8 is provided. The coil spring 12 is energized and stored in the direction of the rear end opening 3a of the rear shaft 3. A clip 13 is integrally provided at the rear end of the rear shaft 3.

  The knock-out writing instrument 1 has a protruding and retracting mechanism in which a cam groove (not shown) for sliding and rotating the rotating cam 4 back and forth on the inner wall surface of the rear shaft 3, and at the rear end of the rotating cam 4 and the rotating cam 4. This is a conventionally known intrusion mechanism by the rotating cam 4, which is composed of a push rod 5 having a cam portion for sliding the rotating cam 4 and imparting rotation, and a knock body 6, and presses the knock body 6. Thus, the ball-point pen tip 10 at the tip of the ink containing cylinder 8 can be projected and retracted from the tip opening 2 a of the front shaft 2.

  When the knocking writing instrument 1 is used, by pushing the knock body 6 (in the direction of arrow F in FIG. 4), the retracting mechanism by the rotating cam 4 is operated, and the ballpoint pen tip 10 is moved to the front end opening 2a of the front shaft 2. Protrude from. Further, when the knock body 6 is pressed again with the ball-point pen tip 10 protruding from the tip opening 2 a, the retracting mechanism by the rotating cam 4 is activated, and the ball-point pen tip 10 is moved by the biasing force of the coil spring 12. Can be immersive.

  The knock body 6 includes a female screw portion 6b formed on the inner wall of the knock body 6 and a male screw portion 5b formed on the outer wall of the push rod 5 so as to be detachable. The rear end portion of the push rod 5 and the knock body Through holes 5 a and 6 a are formed at the rear end of 6. Further, the push rod 5 has the maximum outer diameter portion of the push rod 5 as the diameter of the rear end opening 3 a of the rear shaft 3 so that the push rod 5 does not fall from the rear end opening of the rear shaft 3 with the knock body 6 removed. It is bigger.

  Further, the string member 14 is attached so that the through hole 5a of the push rod 5 and the through hole 6a of the knock body 6 are communicated, and the through hole 5a of the push rod 5 and the through hole of the knock body 6 are attached to the string member 14. The connecting member 15 is larger than the diameter of the through hole 5a of the push rod 5 and is connected by the connecting member 16 larger than the diameter of the through hole 6a of the knock body 6 so as not to easily come off from 6a.

  When the knock body 6 is removed from the push bar 5 while the ballpoint pen tip 10 is inserted from the tip opening 2a, the portion protruding from the rear end of the rear shaft 3 is eliminated as shown in FIG. The ball pen tip 10 does not protrude from the front end opening 2a of the front shaft 2 because the retracting mechanism by the rotating cam 4 cannot be operated.

  At this time, the string member 14 is attached to the push rod 5 and the through holes 5a, 6a of the knock body 6 so as not to easily fall off from the push rod 5, so that even if the knock body 6 is removed, The knock body 6 is not lost by the member 14.

  In addition, the size of the ring of the string member 14 can be adjusted by the knock body 6 by attaching the string member 14 in communication with the push rod 5 and the through holes 5a, 6a of the knock body 6, so This is preferable because no parts are required.

  Further, since the in / out mechanism does not depend on the clip 13, even if the clip breaks for some reason such as dropping, the in / out mechanism can be operated to allow the ball-point pen tip 10 to go in and out from the tip opening 2 a of the front shaft 2.

  The knock type writing instrument 21 with the string member of the second embodiment shown in FIGS. 5 to 7 is similar to the first embodiment in that the ink is placed in the shaft cylinder in which the male screw portion of the front shaft 2 and the female screw of the rear shaft 23 are screwed together. A ballpoint pen tip 10 is attached to the front end of the storage cylinder 8 via a tip holder 9, a tail plug 11 is attached to the rear end of the ink storage cylinder 8, and ink for writing instruments (not shown) is installed inside the ink storage pipe 8. The refill 7 for a writing instrument in which is stored is urged and stored in the direction of the rear end opening 23a of the rear shaft 23 by the coil spring 12. A clip 33 is integrally provided at the rear end of the rear shaft 23.

  The knock body 6 has a female screw portion 6b formed on the inner wall of the knock body 6 and a male screw portion 5b formed on the outer wall of the push rod 5 detachably screwed together. Further, through holes 34 a and 6 a are formed in the side wall of the clip 33 and the rear end portion of the knock body 6. Further, the push rod 5 has the maximum outer diameter portion of the push rod 5 as the diameter of the rear end opening portion 23a of the rear shaft 23 so that the push rod 5 does not fall from the rear end opening portion of the rear shaft 23 with the knock body 6 removed. It is bigger.

  Moreover, while attaching the string member 34 so that the through-hole 33a of the clip 33 and the through-hole 6a of the knock body 6 may be connected, the string member 34 is not easily detached from the through-hole 6a of the knock body 6. The knock member 6 is connected by a connecting member 35 larger than the diameter of the through hole 6a.

  When the knock body 6 is removed from the push rod 5 while the ballpoint pen tip 10 is immersed from the tip opening 2a of the front shaft 2, there is no portion protruding from the rear end of the rear shaft 23 as shown in FIG. Since the knocking operation cannot be performed, the retracting mechanism by the rotating cam 4, the push rod 5, and the cam groove (not shown) cannot be operated, so that the ball-point pen tip 10 does not protrude from the front end opening 2 a of the front shaft 2.

  At this time, since the string member 34 is attached to the clip 33 and the through holes 33a, 6a of the knock body 6 so as not to easily fall off from the knock body 6, even if the knock body 6 is removed, the string member The knock body 6 is not lost by 34.

  In the present embodiment, for the sake of convenience, a retracting mechanism by a rotating cam is illustrated, but by pressing a knocking body protruding from the rear end of the shaft tube, the writing tip of the refill for the writing instrument is moved to the tip opening of the shaft tube. There is no particular limitation as long as the intrusion mechanism is a structure that does not depend on the clip.

  Further, the string member may be connected in a ring shape that is suspended from the neck or the like as in the embodiment, or may be connected in a single state like a book or a notebook such as a notebook. .

  By removing the knock body, it can be used as a bookmark for books and notebooks, and the writing tip does not protrude, so portability, convenience and safety are enhanced.

It is a longitudinal cross-sectional view which shows the knock type writing instrument with a string member of Example 1. It is a figure which shows the state which protruded the ball-point pen tip in FIG. It is a figure which shows the state which removed the knock body in FIG. FIG. 2 is an enlarged view of a main part, partly omitted in FIG. 1. It is a longitudinal cross-sectional view which shows the knock type writing instrument with a string member of Example 2. It is a figure which shows the state which removed the knock body in FIG. FIG. 6 is an enlarged view of a main part, partly omitted in FIG. 5.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,21 Knock type writing instrument 2 Front shaft 3, 23 Rear shaft 4 Rotating cam 5 Push rod 5a Through hole 6 Knock body 6a Through hole 7 Ball pen refill 8 Ink storage cylinder 9 Tip holder 10 Ball pen tip 11 Tail plug 12 Coil spring 13, 33 clip 33a through hole 14, 34 string member 15, 16, 35 connecting member

Claims (2)

The refill for the writing instrument is arranged in the shaft tube by being biased by the coil spring in the direction of the rear end of the shaft tube, and the knock body protruding from the rear end opening of the shaft tube is pressed to the rear end portion of the shaft tube. A knock type writing instrument with a string member formed by attaching a string member to a knock type writing instrument having a protruding and retracting mechanism capable of protruding and retracting the writing tip portion of the refill for the writing instrument from the tip opening of the shaft cylinder, A string member characterized in that the knock body is detachably attached, a through hole is formed in a rear end portion of the knock body, and the string member is attached in communication with the through hole of the knock body. Knock-type writing instrument with. The retracting mechanism is a retracting mechanism by a rotating cam comprising a knock body, a push rod, a rotating cam, and a cam groove, and the string member communicates with a through-hole formed in a rear end portion of the push rod, The knock type writing instrument with a string member according to claim 1, wherein the string member is integrally formed with or attached to a string member with a slip prevention portion larger than the diameter of the through hole of the push rod.

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