JP2004230698A - Retractable writing utensil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a retractable writing utensil capable of obtaining sufficient durability for positively performing the retractable mechanism without increasing the number of parts more than necessary. <P>SOLUTION: This retractable writing utensil has an opening at the tip of the cylinder for allowing the writing utensil to retract and also has an opening at the other end. A guide groove with an engagement section substantially in the axial direction is formed on a side face of the barrel. A slide piece, which forms a base part sliding in the guide groove, a button part outside the barrel and an internal part inside the barrel, is arranged, so that the internal part of the slide piece is formed so as to be inserted into or press fitted into the guide groove, and also the front and the rear part of the guide groove are closed. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention has a writing body that can appear and disappear in the barrel, and a guide groove formed on the side surface of the barrel, or a locking portion is provided at a position separated from the guide groove, and the writing body moves forward and backward. The present invention relates to a retractable writing instrument in which a sliding piece locks and unlocks a locking portion thereof.
[0002]
[Prior art]
As an example, a barrel 2 in which a guide groove 11 having a locking portion 11b extends substantially in the axial direction and an ink tank 3 in which a writing portion P is formed on one side and a knock portion K is formed on the other side, An elastic body 7 for urging the ink tank 3 in a writing part immersion direction, wherein a base 8b of a clip portion 8 provided in the ink tank 3 is inserted into a guide groove 11 so as to be inserted into the guide groove 11 of the barrel 2. There has been known a retractable writing instrument formed with a buffering means 12 for giving resistance to the movement of the clip portion 8 when the clip portion 8 moves, thereby reducing the return movement speed (see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-7-329486 (Claims)
[0004]
[Problems to be solved by the invention]
However, although it is excellent in that the buffer means is provided, since the rear end of the guide groove extends from the open end of the barrel, the cross section of the barrel is formed in the guide groove from the rear end of the barrel. Since the section up to the stop portion is always in a C-pipe shape, there is a risk that the base of the clip portion may protrude from the rear end of the guide groove and be disassembled if the elasticity of the resilient body is strong. Was.
In view of the above, an object of the present invention is to obtain sufficient durability so that the retracting mechanism can be reliably performed without increasing the number of parts more than necessary.
[0005]
[Means for Solving the Problems]
The present invention has been made in view of the above problems, and since the guide groove formed in the barrel can be independently disposed at a position away from the open end behind the barrel, the rear open end and the rear end of the guide groove are provided. In this section, the cross section of the barrel does not have a C-pipe shape, that is, a notched space is not formed, so that even when the strength of the resilient member is increased, the base of the sliding piece is disengaged from the guide groove. The possibility disappears, and a highly reliable emergence function can be provided regardless of the strength of the resilient member.
To attach the sliding piece to the shaft cylinder, set the width of the inner part of the sliding piece so that it can pass or press fit with the width of the guide groove, and rotate or slide the sliding piece appropriately. Thus, the inner portion can be positioned from outside the guide groove into the shaft cylinder.
[0006]
[Action]
The deformation of the barrel in the inward direction is prevented, and the deformation of the barrel in the outward direction is also prevented.
[0007]
【Example】
1 to 5 illustrate a first embodiment of the present invention. FIG. 1 is a partial vertical sectional view showing a state in which the writing body 2 is stored.
A seal cylinder portion 3 is set on the shaft cylinder 1 via a resilient member 7 so as to be immovable rearward (upward in the figure) with a stepped portion. An inner rib is formed on a rear inner surface of the seal tube portion 3 to keep a seal with an outer wall in front of the writing body 2. In addition, three thin wire portions 5 are formed integrally on the seal lid 4 at radially equal positions (120-degree intervals). The rear end of the thin line portion 5 is fixed to the guide tube 6 and the seal cover 4 is pressed rearward by the urging of the resilient member 7 so that the seal cover 4 and the seal tube portion 3 are kept tightly sealed. .
The distal end portion of the barrel 1 is provided with a distal end opening in which the tip of the writing body 2 slides so that the tip of the writing body 2 can come and go. An end opening hole is provided. A guide groove 1a is formed on a side surface of the barrel 1 so that a slide piece 9 is slidable in the longitudinal direction and a locking portion 1b is formed in a distal direction. The rear of the guide groove 1a is not connected to the rear end opening of the barrel 1, and the guide groove 1a forms a closed window on the side surface of the barrel 1. That is, the front end and the rear end (rear end 1c) of the guide groove 1a are closed. Further, the rear end portion 1c of the guide groove 1a can also serve as a locking portion of the sliding piece 9 when the writing body 2 is housed in the barrel 1.
In the present embodiment, a tip sealing mechanism including a seal lid 4, a seal cylinder 3, a plurality of thin wire portions 5, and the like is illustrated. Of course, a writing body 2 such as an oil-based ballpoint pen without a sealing mechanism is mounted. May be used.
[0008]
The sliding piece 9 includes a button portion 9a outside the barrel 1 and a base 9b that slides and locks in the guide groove 1a, and an inner portion 9c that holds the writing body 2 inside the barrel 1.
In FIG. 1, the rear of the base 9b of the sliding piece 9 is disposed in contact with the rear end 1c of the guide groove 1a or with a slight gap.
FIG. 2 is a partial longitudinal sectional view showing a state in which the writing body 2 protrudes (writing state). The inclined portion 9e formed behind the base 9b of the sliding piece 9 is locked by the locking portion 1b of the barrel 1 so that the writing state can be maintained. In this state, by appropriately rotating the button portion 9a of the sliding piece 9 about the longitudinal axis, the locking of the base 9b of the sliding piece 9 and the guide groove locking portion 1b is released, and the writing body 2 is in the stored state. You can move on to
FIG. 3 is a cross-sectional view taken along the line AA in FIG. 1, in which an inner portion 9 c of the sliding piece 9 embraces the writing body 2 and the sliding piece 9 is disposed rotatably about a substantially longitudinal axis. Have been. More specifically, the cursive front member 2a and the cursive rear member (tail plug) 2b are detachably fixed by screwing, and the inner portion 9c is loosely attached to the screwed portion. That is, the inner portion 9c is integrated with the writing body 2 while being sandwiched between the writing body front member 2a and the writing body rear member (tail plug) 2b.
FIG. 4 is an exploded perspective view of main components. The inner portion 9c of the sliding piece 9 rotates to a reduced diameter portion (the rear member 2b side in this embodiment) formed by the front member (refill) 2a and the rear member (tail plug) 2b, which forms the writing body 2. It is arranged as possible.
[0009]
FIG. 5 is a perspective view showing a process of attaching the sliding piece 9 to the barrel 1. In the present embodiment, the width 9f of the inner portion 9c is insertable into the shaft cylinder guide groove width 1d. First, the cursive front member 2a is inserted into the shaft cylinder 1, and then the sliding piece 9 is inserted. The inner portion 9c can be easily arranged in the shaft cylinder 1 by rotating the sliding piece 9 by about 90 °, and the assembly is completed by rotating the sliding piece 9 by 90 °. Next, the tail plug 2b is made to penetrate the inner part 9c, and the tail plug 2b is screwed and fixed to the cursive front member 2a, thus leading to commercialization.
In this embodiment, the inner portion 9c is insertable into the width of the guide groove 1a of the barrel 1. However, the inner portion 9c may be press-fitted, and the groove width near the locking portion 1b of the barrel 1 is made large. The width 9f of the inner portion 9c may be selected so that assembly can be performed by rotating at this portion.
Further, the inner portion 9c of the sliding piece 9 does not necessarily have to be closed, and may be formed in a C-ring shape with a part cut out (see FIG. 6; second embodiment) or a partial arc shape.
[0010]
FIG. 7 shows a sliding piece 9 and a barrel 1 according to a third embodiment of the present invention. The sliding piece 9 can be attached to the shaft cylinder 1 by compressing and deforming the inner portion 9c at the wide portion 1e near the locking portion 1b of the guide groove 1a. FIG. 8 is a cross-sectional arrow view showing a state where the writing body 2 is stored in a state in which the writing instrument is assembled. As in the previous example, since the sliding piece 9 can be assembled without rotating, the assembly can be simplified.
FIG. 9 shows a fourth embodiment of the present invention. In this embodiment, the clip 9h is integrally formed with the button 9a of the sliding piece 9. An engaging portion 9i is provided on a clip ball portion of the clip portion 9h, and the engaging portion 9i is engaged with an engaging hole 1h provided on a side surface of the barrel 1 to maintain a writing state. The storage state can be maintained by engaging with the locking hole 1g. The method of attaching to the barrel 1 is the same as in the first embodiment.
[0011]
【The invention's effect】
The present invention has an opening at the tip of the barrel at which the writing body extends and retracts, has an opening at the other end, and a guide groove having a locking portion substantially in the axial direction is formed on a side surface of the barrel, A protruding and retractable writing instrument in which a sliding member having a base portion sliding in the guide groove and a button portion outside the barrel and an inner portion inside the barrel is arranged, and Since the inner portion of the sliding piece is formed so as to be insertable or press-fittable, and the front and rear portions of the guide groove are closed, even when the strength of the resilient member is increased, the base of the sliding piece remains the guide groove. There is no possibility that the spring member will come off, and a highly reliable emergence function can be provided regardless of the strength of the resilient member.
[Brief description of the drawings]
FIG. 1 is a vertical sectional view of a main part of a first embodiment in a cursive state in a stored state.
FIG. 2 is a vertical cross-sectional view of a main part of a cursive body storage projecting state.
FIG. 3 is a cross-sectional view of FIG.
FIG. 4 is an exploded perspective view of the first embodiment.
FIG. 5 is a perspective view of a main part showing an assembling process in the first embodiment.
FIG. 6 is a perspective view of a sliding piece in a second embodiment.
FIG. 7 is an essential part perspective view showing an assembling process in a third embodiment.
FIG. 8 is a cross-sectional view of FIG.
FIG. 9 is an exploded perspective view of a main part in a fourth embodiment.
FIG. 10 is a longitudinal sectional view of a main part in a fourth embodiment.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 shaft cylinder 1a guide groove 1b locking portion 1c rear end 1d guide groove width 1e wide portion 1f chamfered portion 1g locking hole 1h locking hole 2 writing body 2a writing body front member 2b writing body rear member 3 sealing cylinder part 4 Seal lid 5 Small diameter section 6 Guide cylinder 7 Repelling member 8 Clip 9 Sliding piece 9a Button section 9b Base section 9c Inner section 9d Notch section 9e Inclined section 9f Inner section width 9g Chamfer section 9h Clip section 9i Lock section

Claims (2)

A guide groove having an opening at the tip of the barrel for allowing the writing body to protrude and retract, another opening at the other end, and a guide groove having a locking portion substantially in the axial direction is formed on a side surface of the barrel. A retractable writing instrument in which a sliding piece having a base portion sliding on the outside and a button portion outside the barrel and an inner portion inside the barrel is arranged, wherein A retractable writing implement, wherein an inner part is formed so as to be insertable or press-fittable, and a front part and a rear part of the guide groove are closed. 2. The retractable writing implement according to claim 1, wherein a clip portion is formed on a button portion of the sliding piece.

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