JPH0615738Y2 - Knock type writing instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a knock-type writing instrument in which replacement of a refill is extremely easy.

(Prior art and its problems) Conventionally, when replacing the refill of a notch-type writing instrument,
It is troublesome to remove the mouthpiece from the front end of the shaft cylinder and to remove the knock body or the like attached to the rear end of the shaft cylinder. Further, by making the front end portion or the rear end portion of the shaft tube separable, the structure becomes complicated and the cost becomes high. An object of the present invention is to provide a knock-type writing instrument that solves these problems.

(Means for Solving Problems) The knock-type writing instrument of the present invention devised to achieve the above-mentioned object is provided with a locking projection (1) on the side surface and the rear end portion as it is as a knock portion (2). Forming eggplant refill (3), barrel
An axial notch groove (5) into which the locking protrusion (1) of the refill (3) can be fitted is provided on the side surface of (4) from the rear end opening edge, and a clip mount (7) straddling the notch groove (5) is provided. ) Is provided, and the front and rear ends are alternately swingable inward and outward of the barrel (4) and move toward and away from the side surface of the refill (3) inside the barrel (4). The fulcrum part of is supported by the clip mounting base (7) and the front end of the locking lever (12) is biased by the leaf spring (17) so that it approaches the refill (3). With the rear end of the locking lever (12) protruding toward the rear of the clip (16), the refill (3) is placed back and forth in the barrel (4). It is housed so that it can move in any direction, and the locking protrusion (1) of the refill (3) is cut out.
It is characterized in that the locking lever (12) in (5) is fitted forward from the front end.

(Embodiment) The figure shows an embodiment of the present invention, in which a locking projection is provided on the side surface.
(1) is provided, and a ball-point pen refill (3) whose rear end is directly formed into the knock part (2) is formed, and the side face of the barrel (4) is refilled from the rear end opening edge to the front by the required distance.
An axial notch groove (5) having a width into which the locking projection (1) of (3) can be fitted is provided, and the front wall and the rear wall of the notch groove (5) are provided at the front end of the notch groove (5). A series of wide parallel groove portions (6) with an obtuse parallel to the side wall are opened in series, and a clip mount (7) is provided near the rear end of the shaft cylinder (4) across the notch groove (5). Support grooves (8) are formed on the opposite side walls of the clip mounting base (7), and a horizontal pressing plate (9) is provided in the latter half of the clip mounting base (7) and the front half is lowered in the first half through a step in the substantially central portion. Inclined locking plate
(10) is provided, and a supporting piece (11) is provided on the front edge of the pressing plate (9).
To form the locking lever (12), and the support piece (11) of the locking lever (12) is fitted into the support groove (8) of the clip mounting base (7) and locked. ) Is supported so that the front and rear ends thereof can be alternately moved up and down, and the locking plate (10) of the locking lever (12) is supported.
Assemble the locking lever (12) with the front end of the fitting plate fitted in the notch groove (5) and the rear end of the pressing plate (9) protruding rearward of the clip mount (7). Locking step on the lower surface
An elastically deformable clip (16) provided with a projection (14) having (13) and a mounting leg piece (15) on the lower surface of the rear end is formed, and the clip (16) is attached to the barrel (4). It is located above the notch groove (5) and its mounting leg pieces (15) are fixed to the clip mounting base (7), and the lower surface of the clip (16) and the locking plate on the locking lever (12). A leaf spring (17) is interposed between the upper portion of the portion (10) and the locking plate portion (10) is always urged downward, and the above-mentioned refill (3) is attached to the barrel ( Insert the locking projection (1) into the inside of 4) from the rear end opening with the notch groove (5) fitted,
Apply the locking protrusion (1) of the refill (3) to the locking plate (10) of the locking lever (12) and push it up while passing the lower surface of the locking plate (10) forward of the front edge of the locking plate (10). Position the shaft cylinder (4)
With a knock spring (not shown) that biases the refill (3) rearward, the locking projection (1) is in contact with the front edge of the locking plate (10) The front end writing part (not shown) of the refill (3) is retracted into the inside of the front end opening (18) of the barrel, and the notch part (2) is pushed forward to refill (3).
And push the locking projection (1) against the projection (14) of the clip (16) to push it up and let it pass through the bottom surface of the clip (16).
The length of the refill (3) so that the writing part of the refill (3) protrudes from the front end opening (18) of the barrel when engaged with (13),
It is configured by appropriately setting the length of the shaft tube (4), the position of the locking protrusion (1), the position of the locking step (13) and the like. In addition, in order to immerse the writing part of the refill (3) from the state of protruding from the front end opening (18) of the shaft cylinder, as shown in FIG.
(2) is pressed further forward to bring the locking projection (1) into contact with the inclined front wall (19) of the wide groove (6), and guide it by the front wall (19) while locking the step (13). After that, the knocking force is released, and the restoring force of the knocking spring causes the locking projection (1) to pass through the side of the locking step (13) as it is and retract to wide the groove.
Apply to the slanted rear wall (20) of (6), guide it again by the rear wall (20) and move it into the original notch groove (5), and lock the locking lever (12) by the force of the knock spring. It may be retracted until it contacts the front edge of the plate portion (10).

The means for immersing the writing part from the state in which it is projected from the front end (18) of the barrel is not limited to the above embodiment.

(Function) When inserting the refill (3) into the barrel (4), as described above, from the rear end opening of the barrel (4) to the locking protrusion (1).
It can be pushed in as it is while it is fitted into the notch groove (5). The locking projection (1) hits the locking plate (10) of the locking lever (12) and pushes up the locking plate (10) while passing through the lower surface of the locking plate (10) to move the locking plate (10). If you move forward and release the pushing force against the refill (3), the knockout spring will cause the refill (3) to retract, but the locking projection (1) will stop at the front edge of the locking plate (10). It is prevented from falling out. Next, the refeel
When pulling out (3) from the barrel (4), the pressing plate (9) at the rear end of the locking lever (12) may be pressed downward as indicated by the arrow in FIG. The locking lever (12) leverages the support piece (11) as a fulcrum, and the front end of the locking plate (10) moves upward against the leaf spring (17) to move the locking plate (10). Since the locking protrusion (1) is disengaged from the shaft, the refoil (3) is retracted by the force of the knock spring and the barrel (4)
Automatically extracted from. In the above embodiment, the locking lever (1
It is assumed that 2) has a rigidity that does not deform due to the spring force of the leaf spring (17) when the locking plate portion (10) moves upward.

(Effects of the Invention) The knock-type writing instrument of the present invention is as described above. To store the refill in the barrel, simply push it in, and to pull out the refill from the barrel, press the locking lever. It is sufficient to replace the refills with a one-touch operation. Further, since it is not necessary to attach a separable component to the end of the barrel, the structure is simple and the cost can be increased.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention. FIG. 1 is a perspective view showing a state in which the clip and the barrel are separated, FIG. 2 is a longitudinal sectional view of an essential part, and FIG. 3 is FIG. FIG. 4 is a lateral cross-sectional view at the line position, and FIG. 4 is a partially upper side view of the barrel showing the movement process of the locking projection in the wide groove portion. (1) …… Mating support projection, (2) …… Knot part, (3) …… Refeel, (4) …… Shaft cylinder, (5) …… Notch groove, (6) …… Wide groove part,
(7) …… Clip mount, (8) …… Support groove, (9) …… Pressing plate, (10) …… Locking plate, (11) …… Supporting piece, (12) …… Stop lever, (13) …… Lock step, (14) …… Protrusion, (15) ……
Mounting leg piece, (16) …… clip, (17) …… leaf spring, (18)…
… Front end of barrel, (19) …… Front wall of wide groove, (20) …… Rear wall of wide groove.

Claims (1)

[Scope of utility model registration request] 1. A refill (3) having a locking projection (1) provided on a side surface and a rear end portion of which is directly used as a knock portion (2),
An axial notch groove (5) into which the locking projection (1) of the refill (3) can be fitted is provided on the side surface of the shaft tube (4) from the rear end opening edge, and a clip mount that straddles the notch groove (5). (7) is provided, and the front and rear ends can be alternately swung in and out of the barrel (4).
The fulcrum of the locking lever (12) that moves toward and away from the side of the refill (3) inside is supported by the clip mounting base (7), and the front end of the locking lever (12) is moved to the refill (3). Shaft cylinder (4) without being biased by the leaf spring (17)
With the rear end of the locking lever (12) protruding toward the rear of the clip (16), the refill (3) is placed back and forth in the barrel (4). It is housed so that it can move in any direction, and the locking protrusion (1) of the refill (3) is cut out.
A knock-type writing instrument characterized in that the locking lever (12) in (5) is fitted forward from the front end.