JP2508393Y2 - Knock type writing instrument - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention locks an engaging portion provided on a clip and an engaging portion provided on a knock rod or the like with a writing portion protruding from a shaft tip opening. The present invention relates to a knock-type writing instrument configured such that a refill or the like is retracted by elastic force of a spring by releasing the lock by fixing the refill and the like and retracting the writing part into the barrel.

(Prior Art) With the writing section protruding from the shaft tip opening, a writing implement is fixed to the chest pocket of the clothes so that the clothes are not stained by the ink or the like of the writing section. There is a writing implement. As an example thereof, as shown in FIGS. 14 and 15, the tip ball portion (2 ′) of the clip (1 ′) is provided with an engaging portion (3 ′) and faces the engaging portion (3 ′). A window hole (5 ') into which the ball portion (2') can be inserted is provided on the side surface of the shaft cylinder (4 '), and an engaging portion (7') is also provided on the side surface of the knock body (6 '). The body (6 ') is advanced so that the tip writing portion (9') of the refill (8 ') is brought into the shaft tip opening (10').
The engaging part (3 ') of the clip (1') and the engaging part (7 ') of the knock body (6') are locked and fixed while protruding from the rear end of the clip (1 '). By pressing down the pressing plate portion (11 ′) provided on the shaft in the axial tube direction, the tip of the clip (1 ′) is conversely lifted so that the locking portion (3 ′) of the ball portion (2 ′) and the knock body (6). The refill (8 ') and the knock body (6') are retracted by the spring (12 ') when the engagement state (7') of the refill (8 ') is released, and the refill (8') is rewritten. There is a structure in which (9 ') is immersed in the shaft.

That is, when the writing portion (9 ') projects from the shaft tip opening (10'), the engaging portion (3 ') of the clip (1') and the engaging portion (7 ') of the knock body (6') are connected to each other. The clip (1 ') is locked so that the clip (1') cannot be used. Therefore, the clip (1 ') is prevented from being fixed to the chest pocket, and when the clip (1') is forcibly lifted and fixed to the pocket or the like, the clip (1 ') is locked. Since the engagement state of the engagement portion (3 ') of the knockdown body (6') and the engagement portion (7 ') of the knock body (6') is released, the refill (8 ') is inevitably urged by the spring (12'). Back to the writing department (9 ')
Is to be immersed in the season to prevent the writing part (9 ') from being soiled by clothes or the like.

(Problems to be solved by the present invention) By the way, in the above-described conventional writing implement, the engaging portion (3 ') of the clip (1') and the engaging portion (7 ') of the knock body (6') are formed. In order to cancel the locked state, the clip (1 ') is configured such that the pressing plate portion (11') at the rear end thereof is pushed down in the axial cylinder direction to raise the clip tip ball portion (2 '). In the structure, since a load is repeatedly applied to the mounting base (13 ') of the clip (1'), the mounting base (1 '
3 ') tends to set off, so the mounting base (1
Since it is impossible to use 3 ′) made of synthetic resin in terms of strength, for example, a metal plate or the like had to be used. Therefore,
It is impossible to mold the clip integrally with the barrel, which increases costs due to material and assembly costs, and there is a variation in quality due to the mounting condition when attaching the clip to the barrel. There was a problem that arose. The purpose of the present invention is to provide a knock-type writing instrument that solves such a problem.

(Means for Solving Problems) A knock-type writing instrument of the present invention devised to solve the above-mentioned problems has an engaging step formed at the tip of a clip fixed to the rear end of a shaft cylinder. It is equipped with a ball part, and the refill is stored in the barrel while being biased rearward by a coil spring.
A knock rod that interlocks with the refill is arranged at the rear end of the refill, and a protrusion is provided substantially at the center of the engaging portion at the tip of the elastic piece that extends on the upper end of the knock rod and is placed on the side surface of the refill. It is configured to be displaceable substantially at right angles to the axial direction, and it is advanced by knocking the rear end of a knock bar protruding from the rear end of the shaft cylinder to move it forward to move the engagement step of the clip ball upward and to engage the above-mentioned engagement. The writing part is projected from the tip of the shaft in the state of being locked with the shaft part, and the button provided on the side surface of the shaft cylinder so as to be displaceable inward in this state is arranged to face the protrusion of the elastic piece. Then, pressing the button displaces the elastic piece through the protrusion, disengages the engaging part from the engaging step part of the ball part, releases the locked state, and retracts the refill and knock bar with the coil spring. So that the writing part provided at the tip of the refill is immersed in the barrel. It is that the form was.

(Embodiment) The embodiment of the present invention shown in FIGS. 1 to 13 is made of resin and provided with an axial slit (8) on its side surface from the rear end opening edge to a required distance forward position and substantially at the center thereof. On both side walls forming the slit (8), an elastic piece (6) which can be displaced inward and a button (7) at its tip are provided.
The clip (4) fixed to the rear end base (3) of the shaft cylinder (1) is made of a resin molded product which is integral with or separate from the shaft cylinder (1) (at least the elastic portion is made of metal. A ball portion (5) having an engagement step portion (11) formed on one side surface is provided at the tip of the clip (4). Further, the base (3) is provided with a groove (9) which communicates with the slit (8) and opens in the front and back, and a step (10) is provided at the front end of the base (3) as shown in FIG. It is provided. Meanwhile, refills (20)
Has a writing part (21) at its tip, and a tail plug (23) is fitted to the rear end of a cylinder part on which ink is mounted. Refill (2
0) is a coil spring (24) between an inner surface step (not shown) formed in the tube (1) and an outer step (22) of the refill (20) from the rear end of the tube (1). ) Is inserted, and a knock bar (12) interlocking with the refill (20) is arranged at the rear end, and the knock bar (12) has a notch (13) appropriately formed from the front end. In the tubular body, an engaging portion (14) is provided at the tip of an elastic piece (12a) extending from the front end at the upper end portion and placed on the side surface of the refill (20), and a protrusion (15) is provided substantially at the central portion.
Is provided, and further, a locking projection (16) is provided on the upper end of the slit so that the elastic piece (12a) can be displaced in the same direction when pressed in a direction substantially perpendicular to the axial direction. It is fitted in (8) so as to be rotatable in the axial direction. Further, when the knock rod (12) is mounted on the barrel (1), the locking projection (16) is elastically pushed down by the notch (13) to engage with the step (10) at the front end of the base (3). It will be stopped and it will be retained at the retracted position. As described above, the rear end of the knock rod (12) protruding from the rear end of the shaft cylinder (1) is knocked forward to be advanced so that the engaging portion (14) moves the clip ball portion (5) upward to engage. The writing part (21) is locked to the step part (11) and the tip of the shaft (2)
It is made to protrude from and it becomes a writing state. In this state, the protrusion (15) of the elastic piece (12a) and the button (7) are placed in a state of substantially contacting each other, and when the button (7) is pressed inward of the barrel (1), the protrusion (15) is formed. ), The elastic piece (12a) is displaced, and the engaging portion (14) provided at the tip of the elastic piece (12a) disengages from the engaging step portion (11) of the ball portion (5) to release the mutual lock. , The refill (20) and the knock rod (12) are retracted by the coil spring (24) and the writing part (21) is retracted into the barrel (1).

(Operation) The operation will be described below based on the above embodiment.

First, from the state shown in FIGS. 2 to 4 and 7, the rear end of the knock rod (12) is knocked to advance the refill (20), and the writing portion (21) is moved from the shaft tip opening (2). When projected, the engaging part (14) of the knock bar (12) will become the clip ball part (5).
Is moved to the front of the engaging stepped portion (11) and locked, and writing is performed in this state (shown in FIGS. 5, 6, and 8). When the button (7) shown in FIG. 8 is pushed inward of the barrel (1) from the state where the writing is completed, the button (7) pushes the projection (15) as shown in FIG. (12a)
The engaging step part (14) of the ball part (5)
The refill (20) and the knock rod (12) are united and retracted by the force of the coil spring (24) so that the writing section (21) can be removed from the writing tube (21). It will return to its original state when it is immersed inside.

Further, even when the writing instrument (21) of the refill (20) is fixed to the chest pocket or the like while the writing instrument (21) is protruding from the shaft tip opening (2) as shown in FIGS. Since the engagement step portion (11) of (5) and the engagement portion (14) of the knock rod (12) are locked, the use of the clip is hindered and the clip is prevented from being attached to the chest pocket or the like. Further, when it is forcibly fixed to the chest pocket or the like, it means that the engagement state of the engagement step portion (11) of the clip ball portion (5) and the engagement portion (14) of the knock rod (12) is released. Therefore, the refill (20) is inevitably retracted by the force of the coil spring (24), and the writing section (21) is immersed in the barrel. Therefore, it is possible to prevent the clothes from being stained by fastening to the breast pocket or the like with the writing section (21) protruding.

(Effects of the Invention) The present invention is as described above, and when releasing the locked state of the engaging step portion of the clip ball portion and the engaging portion such as the knock rod, the button on the side surface of the shaft cylinder is pressed. Only the clip ball part moves up, the other parts of the clip do not receive any load, and the clip mounting base part does not sag like the conventional example, so the clip ball part is excluded. It is also possible to integrally form the other part of the clip together with the shaft cylinder, and therefore it is possible to reduce the cost, and it is also possible to solve the problem of quality variation due to how the clip is attached to the shaft cylinder. Further, since the writing portion can be projected and retracted by pushing the knock and the button, it is convenient and has a simple structure, so that it can be provided at a low cost.

[Brief description of drawings]

1 to 13 show an embodiment of the present invention.
FIG. 2 is an exploded perspective view, and FIG. 2 is a longitudinal perspective sectional view of completed assembly, showing a state in which a writing portion is housed in a barrel. FIG. 3 is a front view seen from one side in the state of FIG. 2, FIG. 4 is a view seen from the other side, and FIG. 5 is a state in which the writing portion is knocked and the writing portion is projected from the tip end of the shaft. FIG. 6 is a front view seen from one side, FIG. 6 is a view seen from the other side, FIG. 7 is a perspective cross-sectional view of the main part seen from the upper side in a state where the writing portion is housed in the barrel, and FIG. Fig. 9 is a perspective cross-sectional view of the main part of the writing part projected from the tip of the shaft, as seen from the upper surface. Fig. 9 shows the writing part retracted into the barrel by pressing the button to release the locked state. Perspective cross-sectional view of the main part seen from the top showing the instantaneous state,
FIG. 10 to FIG. 13 are perspective views of essential parts showing a partially cut-away state in which the engaging step portion and the engaging portion of the clip ball portion are engaged and disengaged. Also, FIGS. 14 and 15 show a conventional example.
FIG. 14 is a semi-longitudinal sectional view in which the writing section is projected from the tip of the shaft, and FIG. 15 is a longitudinal sectional view in which the writing section is immersed in the shaft. (1) …… Shaft barrel, (2) …… Shaft tip opening, (3) …… Base, (4) …… Clip, (5) …… Ball, (6) ……
Elastic piece, (7) ... button, (8) ... slit, (9) ...
… Groove, (10) …… Step, (11) …… Engagement step, (12)…
… Knock rod, (12a) …… elastic piece, (13) …… notch, (1
4) …… Engagement part, (15) …… Protrusion, (16) …… Locking protrusion, (20) …… Refill, (21) …… Writing part, (22)
…… Outer surface step, (23) …… Tail plug, (24) …… Coil spring, (1 ′) …… Clip, (2 ′) …… Ball,
(3 ') ... engagement part, (4') ... shaft cylinder, (5 ') ...
Window hole, (6 ') ... knock body, (7') ... engaging part,
(8 ') ... Refill, (9') ... Writing section, (1
0 ′) …… Shaft tip port, (11 ′) …… Pressing plate, (12 ′)
...... Spring, (13 ′) …… Mounting base.

Claims (1)

(57) [Scope of utility model registration request] Claim: What is claimed is: 1. A clip fixed to the rear end of a barrel is provided with a ball portion having an engaging stepped portion, and the refill is housed in the barrel while being biased rearward by a coil spring. A knock rod that interlocks with the refill is arranged at the rear end of the refill, and a protrusion is provided substantially at the center of the engaging portion at the tip of the elastic piece that extends on the upper end of the knock rod and is placed on the side surface of the refill.
It is configured to be displaceable substantially at right angles to the axial direction, and it is advanced by knocking the rear end of a knock bar protruding from the rear end of the shaft cylinder to move it forward to move the engagement step of the clip ball upward and to engage the above-mentioned engagement. The writing part is projected from the tip of the shaft in the state of being locked with the shaft part, and the button provided on the side surface of the shaft cylinder so as to be displaceable inward in this state is arranged to face the protrusion of the elastic piece. Then
By pressing the button, the elastic piece is displaced through the protrusion, the engaging part is disengaged from the engaging step part of the ball part, the locked state is released, and the refill and knock bar are retracted by the coil spring. A knock-type writing instrument characterized in that a writing section provided at the tip of the refill is configured to be immersed in the barrel.