JP3945409B2 - Intrusive writing instrument - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention has a writing body that can be projected and retracted in a shaft tube, and a guide groove formed on a side surface of the shaft tube, or a locking portion provided at a position separated from the guide groove, and the writing body is moved forward and backward. The present invention relates to a retractable writing instrument in which a sliding piece is engaged with and released from the engaging portion.
[0002]
[Prior art]
As an example, a barrel 2 in which a guide groove 11 having a locking portion 11b extends in a substantially axial direction, 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, And an elastic body 7 that urges the ink tank 3 in the writing portion immersion direction. The base portion 8b of the clip portion 8 provided in the ink tank 3 is inserted into the guide groove 11, and is inserted into the guide groove 11 of the barrel 2. A retractable writing instrument is known in which a buffering means 12 is formed that applies resistance to the movement of the clip portion 8 to reduce the return movement speed when the clip portion 8 moves (see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-7-329486 (Claims)
[0004]
[Problems to be solved by the invention]
However, it is excellent in that a 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 is always in the shape of a C-pipe, there is a risk that the base of the clip part will jump out of the rear end of the guide groove and disassemble if the resilient force of the projectile is strong. It was.
Therefore, an object of the present invention is to obtain sufficient durability so that the above-described intrusion 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 the guide groove formed in the shaft cylinder can be independently arranged at a position away from the opening end behind the shaft cylinder. In this section, the cross section of the shaft cylinder does not have a C-pipe shape, that is, a notched space is not formed, and thus the base of the sliding piece is disengaged from the guide groove even when the strength of the resilient member is increased. The possibility disappears, and a reliable intrusion function can be provided regardless of the strength of the elastic member.
When attaching the sliding piece to the shaft cylinder, the width of the inner part of the sliding piece is set so that it can pass through or press fit into the guide groove width, and the sliding piece is rotated or narrowed as appropriate. Thus, the inner portion can be positioned from the outside of the guide groove into the shaft tube.
[0006]
[Action]
The deformation of the shaft tube in the inner direction is prevented, and the deformation of the shaft tube in the outer direction is also prevented.
[0007]
【Example】
A first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a partial longitudinal sectional view showing a state in which the cursive body 2 is housed.
A seal cylinder portion 3 is locked and set on the shaft cylinder 1 through a resilient member 7 so as not to move backward (upper side in the figure) at a stepped portion. An inner rib is formed on the rear inner surface of the seal cylinder portion 3 to maintain a seal with the outer wall in front of the writing body 2. In addition, three fine wire portions 5 are integrally formed in the seal lid 4 at radial positions at equal intervals (120 degree intervals). The rear end of the thin wire portion 5 is fixed to the guide tube 6, and the sealing lid 4 is pressed backward by the urging force of the elastic member 7, so that the sealing lid 4 and the sealing tube portion 3 are kept sealed. .
The front end portion of the barrel 1 is provided with a front end opening hole through which the front end of the writing body 2 slides so that the front and rear can slide, and the rear end can be slidably disposed on the rear member (tail plug) 2b forming the writing body 2 An end opening hole is provided. A sliding groove 9 is slidable in the longitudinal direction on the side surface of the shaft tube 1, and a guide groove 1a having a locking portion 1b is formed in the distal direction. The rear of the guide groove 1 a is not connected to the rear end opening of the shaft cylinder 1, and the guide groove 1 a forms a window portion closed on the side surface of the shaft cylinder 1. That is, the front end and the rear end (rear end portion 1c) of the guide groove 1a are closed. Further, the rear end portion 1 c of the guide groove 1 a can also be a locking portion of the sliding piece 9 when the writing body 2 is accommodated in the shaft tube 1.
The present embodiment exemplifies a tip sealing mechanism including a seal lid 4, a seal cylinder portion 3, and a plurality of thin wire portions 5, but of course, a writing body 2 such as an oil-based ballpoint pen that does not use the sealing mechanism is mounted. You may use for.
[0008]
The sliding piece 9 includes a button portion 9a on the outer side of the shaft tube 1, a base portion 9b that slides and locks in the guide groove 1a, and an inner portion 9c that holds the writing body 2 on the inner side of the shaft tube 1.
In FIG. 1, the rear part of the base part 9b of the sliding piece 9 is disposed in contact with the rear end part 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 on the rear side of the base portion 9b of the sliding piece 9 is locked to the locking portion 1b of the shaft tube 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 portion 9b of the sliding piece 9 and the guide groove locking portion 1b is released, and the cursive body 2 is stored. Can move on.
FIG. 3 is a cross-sectional view taken along the line AA in FIG. 1, in which an inner portion 9c of the sliding piece 9 holds the writing body 2, and the sliding piece 9 is disposed so as to be rotatable about a substantially longitudinal axis. Has been. More specifically, the writing body front member 2a and the writing body rear member (tail plug) 2b are detachably fixed by screwing, and the inner portion 9c is loosely attached to the screwing part. That is, the inward portion 9c is integrated with the cursive body 2 while being sandwiched between the cursive body front member 2a and the cursive 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 (in the present embodiment, the rear member 2b side) formed by the front member (refill) 2a and the rear member (tail plug) 2b, which forms the writing body 2. Arranged to be possible.
[0009]
FIG. 5 is a perspective view showing a process of attaching the sliding piece 9 to the shaft cylinder 1. In the present embodiment, the width 9f of the inner portion 9c can be inserted into the shaft tube guide groove width 1d. First, the writing body front member 2a is inserted into the shaft tube 1, and then the sliding piece 9 is moved. The inner portion 9c can be easily arranged in the shaft tube 1 by rotating about 90 °, and then the assembly is completed by rotating the sliding piece 9 by 90 °. Next, the tail plug 2b is passed through the inward portion 9c, and the tail plug 2b is screwed and fixed to the cursive body front member 2a to achieve commercialization.
In the present embodiment, the inner portion 9c can be inserted into the width of the guide groove 1a of the shaft tube 1, but it may be press-fitted, and the groove width in the vicinity of the locking portion 1b of the shaft tube 1 is made large. However, the width 9f of the inner portion 9c may be selected so that it can be assembled by rotating at this portion.
Further, the inner portion 9c of the sliding piece 9 does not necessarily need to be closed, and may be a C-ring shape (see FIG. 6; second embodiment) with a part cut away, or a partial arc shape.
[0010]
FIG. 7 shows the sliding piece 9 and the shaft tube 1 of the third embodiment of the present invention. The sliding piece 9 can be attached to the shaft tube 1 while the inner portion 9c is contracted and deformed by the wide portion 1e in the vicinity of the locking portion 1b of the guide groove 1a. FIG. 8 is a cross-sectional arrow view showing a state where the writing instrument 2 is stored in a state where the writing instrument 2 is assembled. Since the slide piece 9 can be assembled without rotating as in the previous example, the assembly can be simplified.
FIG. 9 shows a fourth embodiment of the present invention. In this embodiment, the clip portion 9h is integrally formed with the button portion 9a of the sliding piece 9. The clip ball portion of the clip portion 9h is provided with a locking portion 9i, and the locking portion 9i can be engaged with a locking hole 1h provided on the side surface of the shaft tube 1, so that the writing state can be maintained. The storage state can be maintained by engaging with the locking hole 1g. The mounting method to the shaft cylinder 1 is the same as that of the first embodiment.
[0011]
【The invention's effect】
The present invention has an opening for projecting and retracting the writing body at the tip of the shaft cylinder, an opening at the other end, and a guide groove having a locking portion in a substantially axial direction is formed on the side surface of the shaft cylinder, A retractable writing instrument in which a sliding piece having a base portion sliding inside the guide groove, a button portion on the outside of the shaft tube, and an inner portion on the inside of the shaft tube is disposed. The cursive body is embraced and connected by a side part, and the cursive body is composed of a cursive body front member and a cursive body rear member, and the cursive body front member and the cursive body rear member are detachably fixed by screwing. In addition, the inner part of the sliding piece is sandwiched between the writing body front member and the writing body rear member, and the inner part is formed in a ring shape, a C ring shape, or a partial arc shape. further, the inner part is inserted or press fit capable of sliding piece with respect to the guide groove Since the front portion and the rear portion of the guide groove are closed, even if the strength of the resilient member is increased, there is no possibility that the base portion of the sliding piece is detached from the guide groove, and the strength of the resilient member is increased. Regardless, a highly reliable haunting function can be provided.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of an essential part of a cursive storing state in a first embodiment.
FIG. 2 is a vertical cross-sectional view of a main part in a cursive storing and protruding 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 main part perspective view showing an assembling process in the first embodiment.
FIG. 6 is a perspective view of a sliding piece in the second embodiment.
FIG. 7 is a perspective view of relevant parts showing an assembling process in a third embodiment.
8 is a cross-sectional view of FIG.
FIG. 9 is an exploded perspective view of main parts in a fourth embodiment.
FIG. 10 is a longitudinal sectional view of an essential part in a fourth embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Shaft cylinder 1a Guide groove 1b Locking part 1c Rear end part 1d Guide groove width 1e Wide part 1f Chamfering part 1g Locking hole 1h Locking hole 2 Writing body 2a Writing body front member 2b Writing body back member 3 Seal cylinder part 4 Seal lid 5 Small diameter part 6 Guide cylinder 7 Repellent member 8 Clip
9 Sliding piece
9a Button part
9b Base
9c Inner part 9d Notch part 9e Inclined part 9f Inner part width 9g Chamfered part 9h Clip part 9i Locking part

Claims (2)

A guide groove having an opening for projecting and retracting the writing body at the tip of the shaft tube, an opening at the other end, and a locking portion in a substantially axial direction is formed on the side surface of the shaft tube. A pendulum type writing instrument in which a sliding piece formed with a base part that slides on the outside, a button part on the outer side of the shaft cylinder, and an inner part on the inner side of the shaft cylinder, is written by the inner part of the sliding piece. The cursive body is composed of a cursive body front member and a cursive body rear member, and the cursive body front member and the cursive body rear member are detachably fixed by screwing together. sandwiching an inner portion of the sliding piece by cursive front member and cursive rear member, the ring-shaped closed the inner portion, or C ring, or is formed in part arcuate, further wherein The inner part of the sliding piece is formed so that it can be inserted or pressed into the guide groove. Both retractable writing instrument, characterized in that the front and rear of the guide grooves are closed.   2. The retractable writing instrument according to claim 1, wherein a clip portion is formed on the button portion of the sliding piece.

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