JPH0717515Y2 - Notch type writing instrument - Google Patents

Description

[Detailed Description of the Invention] (Industrial field of application) The present invention relates to a state in which the front end writing portion of the refill is projected from the shaft tip opening by a knock operation, and the state is locked by a clip, and the clip is locked by the clip. The present invention relates to a knock-type writing instrument such as a ball-point pen, felt-tip pen, marking pen, or sharp pencil, in which the writing portion is retracted inside the shaft by resolving the above problem and retracting the refill by the force of the spring.

(Prior Art) A conventional writing instrument of this kind has a structure in which the writing portion is projected by a knocking operation and the writing portion is immersed by an operation of lifting the clip tip ball portion, so the operation is troublesome. There was a flaw. Therefore, the actual development 63-17
As disclosed in Japanese Patent No. 9186, the present applicant has already proposed a knock-type writing instrument in which the writing part can be projected by a knocking operation and the writing part can be immersed by the knocking operation as well. Then, when the writing tool is knocked with the locking projection engaged with the locking step provided on the tip of the clip and the writing section is protruding, the locking projection advances and the locking projection is released. The locking projection is abutted against the inclined cam front edge portion of the window hole of the inserted shaft cylinder so that the locking projection is disengaged from the locking step portion by sliding laterally. A locking protrusion is integrally provided on the side surface of the refoil, and the rear end of the refoil is directly used as a knock portion.

(Problems to be Solved by the Invention) The above-described knock type writing instrument of the present applicant has the following problems. First, in order for the locking protrusion to abut the front edge of the cam of the window hole and slide in the lateral direction, the refill must rotate, but since the rear end knock of the refill is pressed with a finger, that finger brakes. However, the refoil may not rotate smoothly and may not operate reliably. Next, since the locking protrusions are integrally provided on the refill, there are restrictions in terms of materials and dimensions, so that the strength of the locking protrusions is not sufficient, and there is a risk that the locking protrusions may break and break down. Therefore, the present invention aims to provide a knock-type writing instrument free from such a concern.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention notch-type writing instrument,
A knock body (4) is provided behind the refoil (3) housed in the barrel (1) while being biased rearward by the spring (2).
And a rotation piece (5) rotatable with respect to the knock body (4) is interposed between the knock body (4) and the refill (3), and a locking projection (6) is provided on the rotation piece (5). ) Is provided, and a locking step portion (9) is provided on a clip tip ball portion (8) that can be lifted by elastic deformation of the clip body (7), and an engaging portion is provided on a side surface portion of the shaft cylinder facing the clip body (7). An axially long window hole (10) is formed in the range from the rear of the stop step (9) to the front of the locking step (9), through which the locking projection (6) can penetrate.
When the locking projection (6) moves forward of the locking step (9) in the window hole (10), the locking projection (6) abuts and slides to cause the locking projection (6). Is engaged by an inclined cam front edge (11) which is displaced laterally of the locking step (9) and a locking projection (6) which is displaced by the cam front edge (11). An escape portion (12) that can move rearward by passing beside the stop step portion (9) and a locking projection (6) through the escape portion (12) to the rear side of the locking step portion (9). Locking protrusion (6) when moved
Alternatively, the slanted cam side edge stepped portions (13) are displaced so that the locking projections (6) are displaced rearwardly of the locking stepped portion (9) on the same axis line by the sliding contact of the rotating piece (5) body. Provided,
With the refill (3) retracted to the retreat limit of the rotating piece (5), the front end writing part (14) of the refill (3) sinks into the shaft and the locking projection (6) engages with the locking step (9). The writing portion (14) is dimensioned so as to project from the shaft tip opening (15) in a state in which the refill (3) is advanced to a position where it is engaged with.

(Example) Hereinafter, an example will be described with reference to the drawings. The axial cylinder (1) is opened at the front and rear ends, respectively, and a window hole (10) is formed in a part of the side surface from the rear end edge to the substantially central portion in the axial direction,
A clip mount (16) is provided on the side surface of the rear end so as to straddle the window hole (10). A rear end of a clip body (7) made of an elastically deformable leaf spring is fixed to the clip mount (16). The clip body (7) is located opposite to the window hole (10), the clip tip ball portion (8) is attached to the front end of the clip body (7), and the locking step portion (9) is formed on the inner surface portion thereof. is doing. The locking step portion (9) is arranged at a position slightly rearward of the front end of the window hole (10). A ball-point pen refill (3) is housed inside the barrel (1) in a state of being urged rearward by a spring (2), and a rear end portion of a knock body (4) is located behind the refill (3). It is arranged so as to project from the rear end opening of the shaft cylinder (1), and a rotating piece (5) is interposed between the refill (3) and the knock body (4). The rotating piece (5) includes a disc portion (18) sandwiched between the rear end face of the tail plug (17) fitted to the rear end of the refeel (3) and the front end face of the knock body (4), and a disc. It has an arm part (19) extending forward from a part of a side edge part of the part (18) and a locking projection (6) projectingly provided on a front end outer surface part of the arm part (19). . Further, a pin (20) is provided at the center of the front surface of the disc portion (18) of the rotating piece (5).
However, a curved convex portion (21) is projectingly provided at the center of the rear surface, and the pin (20) is a tail plug (17) of the refoil (3).
It is inserted in the rear end face center hole portion (22), and the convex portion (21) is fitted in the front end opening portion of the inner hole (23) of the knock body (4), and the rotary piece (5) is refilled (3). Also, it is rotatably attached to the knock body (4). The arm portion (19) of the rotating piece (5) is brought into contact with the side surface of the refill (3), and the arm portion (19) and the locking projection (6) are placed in the window hole (10) of the barrel (1). It is distributed. The thickness of the arm portion (19) and the thickness of the barrel (1) are substantially the same, the arm portion (19) does not project from the side surface of the barrel (1), but the locking protrusion (6) does not ( The height is set so as to project from the side surface of 1). In the window hole (10) of the barrel (1), the cam front edge (1) inclined forwardly and obliquely forward of the locking step (9) of the clip tip ball (8).
1) is provided, and an escape portion (12) having a width through which the locking protrusion (6) can pass is provided at the rear of the side edge of the cam front edge portion (11), beside the locking step portion (9). Further, a cam side edge step portion (13) inclined rearward and obliquely is provided behind the escape portion (12). When the knock body (4) is pushed forward with the locking projection (6) engaged with the locking step (9), the locking projection (6)
Collides with the cam front edge (11) and moves diagonally forward while sliding on the cam front edge (11), but at this time, the rotating piece (5) rotates with respect to the knock body (4), and therefore rotates. The piece (5) is not rotationally braked by contact with a finger, and the locking projection (6) can move smoothly. When the knock pressure is released after the locking projection (6) has moved to the side edge of the cam front edge (11), the locking projection (6) is moved laterally of the locking step (9) by the force of the spring (2). The rear end of the arm portion (19) of the rotating piece (5) is cammed with the locking projection (6) moved rearward from the locking step (9) after passing through the escape portion (12) of the cam. Side edge step (1
3) butted on the cam side edge step (13) and moved diagonally rearward so that the locking projection (6) and the arm (19) are again the same behind the locking step (9). It will be located on the axis. In this state, the front end writing portion (14) of the refill (3) is dimensioned so as to be recessed inside the shaft. When the knock body (4) is knocked forward again, the locking projection (6) advances and collides with the tip end ball portion (8) of the clip, and the locking projection (6) is elastically deformed by the clip body (7). The clip tip ball (8) is lifted and passes under it to engage the locking step (9). In this state, the front end writing portion (14) of the refill (3) is dimensioned so as to project from the shaft tip opening (15).

[Action and effect]

The construction of the knock-type writing instrument of the present invention is as described above. First, when the knock body (4) is pressed, the rotating piece (5) rotates and the locking protrusion (6) has the cam of the window hole (10). Leading edge (11)
However, in that case, since the rotary piece (5) is not rotationally braked by the contact with the finger, the locking projection (6) can be smoothly moved and can be reliably operated. Become. Next, since the locking projections (6) are formed on the rotating piece (5) which is separate from the refills (3), it is easy to form the refills (3), but the locking projections (6) The restriction of the size and the material of (1) is reduced, and the locking protrusion (6) which is hard to break can be formed by using a high-strength material such as metal or polycarbonate resin to prevent the failure.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a state in which the writing portion is projected,
The drawing is a cross-sectional view taken along line AA in FIG. 1 showing a state in which the writing portion is immersed. (1) …… Shaft cylinder, (2) …… Spring, (3) …… Refeel, (4) …… Knot body, (5) …… Rotating piece, (6)…
… Locking protrusion, (7) …… Clip body, (8) …… Clip tip ball, (9) …… Locking step, (10) …… Window hole,
(10) …… Cam front edge, (12) …… Escape, (13) ……
Cam side edge step, (14) …… writing part, (15) …… shaft tip opening, (18) …… disc part, (19) …… arm part, (20) …… pin, (21) …… Convex part.

Claims (1)

[Scope of utility model registration request] 1. A knock body (4) is arranged behind a refoil (3) housed in a shaft cylinder (1) in a state of being biased rearward by a spring (2). A locking projection (6) is provided on the rotary piece (5) by interposing a rotary piece (5) which is rotatable with respect to the knock body (4) between the clip body (7) and the refill (3). An engaging step portion (9) is provided on the tip end ball portion (8) that can be lifted by elastic deformation, and an engaging portion on the side surface of the axial cylinder facing the clip body (7) is engaged from the rear of the engaging step portion (9). An axially long window hole (10) through which the locking projection (6) can penetrate is formed in a range extending to the front of the stop (9), and the locking projection (6) is provided in the window hole (10). ) Is moved forward from the locking step (9), the locking projection (6)
An inclined cam front edge portion (11) by which the engagement protrusion (6) is displaced laterally to the engagement step portion (9) by abutting and sliding, and the cam front edge portion (11). The locking projection (6) displaced by the lock is passed through the side of the locking step (9) and can be moved rearward, and the clearance (12) is locked through the clearance (12). When the projection (6) moves rearward from the locking step (9), the locking projection (6) or the rotating piece (5) body abuts and slides, so that the locking projection (6) is locked. Slanted cam side edge step (13) that can be displaced rearward on the same axis of the section (9)
Are provided respectively, and the front end writing part (14) of the refill (3) is retracted into the shaft while the refill (3) is retracted to the retreat limit of the rotating piece (5), and the locking projection (6) is locked. A knock-type writing instrument characterized in that the writing portion (14) is dimensioned so as to project from the shaft tip opening (15) in a state in which the refill (3) is advanced to a position where it engages with the portion (9).