JP2520409B2 - Writing instrument - Google Patents

Description

The present invention relates to a writing instrument such as a rotary mechanical pencil, a rotary ballpoint pen, or a rotary knock mechanical mechanical pencil.

(Prior art)

The inventors of the present invention rotate the cap to rotate this rotation to move the refill back and forth according to the rotation direction by the rotation-back-and-forth motion conversion mechanism so that the tip of the refill is projected and retracted from the tip of the outer cylinder. A ball pen, or similarly, the tip of the refill is projected from and retracted from the tip of the outer cylinder 1, and the chuck that constitutes the refill is knocked by knocking the cap with the tip of the refill protruding from the tip of the outer cylinder. A rotary knock mechanical pencil that can be opened and closed to perform centering is applied in Japanese Patent Application Nos. 60-204385, 61-109562 and 61-1530.
I already proposed it as No. 38.

[Problems to be solved by the invention]

However, in the rotary ballpoint pen of the above-mentioned prior art, even if the refill for mechanical pen is used instead of the refill for ballpoint pen, the core cannot be projected or retracted, in other words,
There is a problem that ballpoint pens and mechanical pencils are not compatible.

In addition, the rotary knock mechanical pencil of the prior art has a gap for knocking in advance between the rear end of the outer cylinder and the head of the cap so that knocking can be performed, so the appearance is not impaired. There was also the problem that it was not possible to obtain one with a good design.

[Means for solving problems]

A first object of the present invention is to provide a compatible writing instrument which has the same structure and can be used as both a rotary ballpoint pen and a rotary mechanical pencil by a rotating operation simply by exchanging a ballpoint pen refill and a mechanical pencil refill. is there.

A second object of the present invention is a rotary knock type which has the same structure and can be used as a rotary ballpoint pen by a rotary operation, in which a knocking allowance gap is formed between the rear end of the outer cylinder and the cap head by the rotary operation. It is to provide a compatible writing instrument that can be used as a mechanical pencil.

That is, in order to achieve the first object of the first writing instrument of the present invention, as shown in FIGS. 1 to 4, the refill is housed in the outer cylinder 1, and the rear end of the refill 2 has a protrusion on the outer surface. Three
A slider 4 having a screw is fitted into the slider 4, and the rotary cap 5 is fitted to the rear end of the outer cylinder 1 so as to be rotatable and immovable in the axial direction. A tip projection slit 7 that communicates with the spiral slit 6 and projects the tip of the refill 2 from the tip of the outer cylinder 1 is provided, and the outer cylinder 1 has an axial passage 8 for a knock amount and this axial passage. Refill 2 connected to 8
Tip projection passage 9 for projecting the tip of the tube from the tip of the outer cylinder 1
And at least one of the slit 7 for tip protrusion and the passage 9 for tip protrusion is made spiral,
The protrusion 3 of the slider 4 is slidably fitted in the spiral slit 6 and the axial passage 8 or in the slit 7 for tip protrusion and the passage 9 for tip protrusion.

In order to achieve the second object, the second writing instrument of the present invention has a fifth
As shown in the drawings and FIG. 6, a refill 2 is housed in an outer cylinder 1, and a slider 4 having a protrusion 3 on the outer surface is fitted to the rear end portion of the refill 2, fitted into the slider 4, and A spiral cap 6 for knocking is provided in a rotary cap 5 which is fitted in a rear end portion of the cylinder 1 so as to be rotatable and movable in an axial direction by a knocking allowance, and a tip of a refill 2 communicated with the spiral slit 6. Is provided with a tip projecting slit 7 for projecting from the tip of the outer cylinder 1. The outer cylinder 1 is provided with an axial passage 8 for a knock amount, and the tip of the refill 2 communicated with the axial passage 8 is connected to the outer cylinder 1. A tip projecting passage 9 for projecting from the tip is provided, and at least one of the tip projecting slit 7 and the tip projecting passage 9 is formed in a spiral shape, and the projection 3 of the slider 4 is formed in the spiral slit 6. And axial communication 8 or end projecting slit 7 and the end projecting passage 9 is obtained by a slidably comprising brought fitted configuration.

[Work]

In the first writing instrument, as shown in FIG. 4 (a), the slider 4 is provided at the beginning of the slit 7 for tip protrusion and the passage 9 for tip protrusion.
Head 5a of the rotating cap 5 when the protrusion 3 of the
4 is rotated in the forward direction shown in FIG. 4 (b), the protrusion 3 of the slider 4 fitted in the slit 7 for tip protrusion and the passage 9 for tip protrusion moves in the circumferential direction along the slit 7 and the passage 9. While moving, it moves forward in the axial direction. By this movement, the tip 2a of the refill 2 projects from the tip of the outer cylinder 1.

At this time, the protrusion 3 of the slider 4 is located at the end of the tip projecting slit 7 and the tip projecting passage 9, that is, at the starting end position of the knocking portion's spiral slit 6 and the knocking portion's axial passage 8. In the case of a ballpoint pen, writing can be performed with a ball wrapped in the tip 2a of the protruding refill 2.

In the case of a mechanical pencil, if the head portion 5a of the rotary cap 5 is further rotated in this position in the positive direction shown in FIG. 4 (c),
The protrusion 3 of the slider 4 is provided at the start end of the axial passage 8 for the knock amount.
Are in contact with each other, the projection 3 of the slider 4 moves in the circumferential direction along the knock slit spiral slit 6 and is guided by the knock slit axial passage 8 to form the spring 2 constituting the refill 2 forward. Move against 10 and head of rotating cap 5
By releasing the rotational force to 5a, the spring force of the spring 10 causes it to move backward. By repeating this operation, the chuck 11 constituting the refill 2 is opened and closed, and the core 12 can be fed from the tip portion 2a of the refill 2 by a predetermined length by opening and closing the chuck 11. Writing is possible with the protruding core 12.

The protrusion 3 of the slider 4 is a spiral slit 6 for knocking.
When the shaft 3 is located at the start end of the axial passage 8 for knocking, that is, at the end of the tip protruding slit 7 and the tip protruding passage 9, when it rotates in the opposite direction, the protrusion 3 of the slider 4 becomes
It moves rearward in the axial direction while moving in the circumferential direction along the slit 7 and the passage 9. By this movement, the tip portion 2a of the refill 2 is pulled in from the tip of the outer cylinder 1. At this time, the protrusion 3 of the slider 4 is at the starting point position of the slit 7 for tip protrusion and the passage 9 for tip protrusion.

Further, in the case of the ballpoint pen of the second writing instrument, the tip portion 2a of the refill 2 can be projected from the tip of the outer cylinder 1 and can be retracted in the same manner as described above (FIGS. 4 (a) and (b)). )reference).

In the case of a mechanical pencil, when the head portion 5a of the rotary cap 5 is rotated in the forward direction with the tip portion 2a of the refill 2 protruding from the tip of the outer cylinder 1 as shown in FIG. 4 (b),
The protrusion 3 of the slider 4 is provided at the start end of the axial passage 8 for the knock amount.
Are in contact with each other, the protrusion 3 of the slider 4 moves in the circumferential direction along the spiral slit 6 for the knocking allowance, and moves the rotary cap 5 backward by the knocking allowance. That is, since the annular groove 21 into which the annular protrusion 22 is fitted is widened by the knocking allowance, the rotary cap 5 is moved backward by the knocking allowance (see FIG. 6).

When the rotary cap 5 is knocked in this state, the protrusion 3 of the slider 4 moves forward in the axial passage 8 for the knock allowance, and the rotary cap 5, the slider 4 and the refill 2 resist the spring 10 by the knock allowance. Move forward, and again spring 10
The chuck 11 is moved by the spring force of
Can be opened and closed, and the chuck 12 can be opened and closed to feed the core 12 by a predetermined length. In order to retract the tip 2a of the refill 2, the head 5a of the rotary cap 5 may be rotated in the opposite direction.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a longitudinal sectional view showing an embodiment of a first writing instrument of the present invention, and FIGS. 2 (a) and 2 (b) are external views showing an example of a slider used in the present invention and their longitudinal sectional views, respectively. 3 (a) and 3 (b) are external views showing two examples of the rotating cap used in the present invention.

In FIG. 1, 1 is an outer cylinder, and 2 is a refill contained in the outer cylinder 1. In the case of a ball-point pen, this refill 2 is composed of an ink tank and a tip portion which is connected to the ink tank and has a ball at its tip. In the case of a mechanical pencil,
As shown in the first illustration, a lead tank 13, a chuck 11 connected to the lead tank 13, a chuck ring 14 fitted to this, and a chuck ring 14 inserted between the chuck ring 14 and the outer cylinder 1, A shaft body 16 which is brought into contact with the inner step portion 15 and has a shaft body front end portion (which serves as a front end portion of the refill 2) 2a protruding from the front end of the outer cylinder 1, and a screw ring attached to the rear portion of the shaft body 16 for chuck ring It comprises a chuck ring sleeve 17 for locking the rear end of the spring 14 and a spring 10 inserted between the sleeve 17 and the lead tank 13.

Reference numeral 4 denotes a slider fitted to the outer periphery of the rear portion of the lead tank 13 that constitutes the refill 2, and has a protrusion 3 on the rear of the outer surface (see FIG. 2). Reference numeral 5 is a rotary cap fitted on the outer circumference of the slider 4. The rotary cap 5 has an axial slit 18 into which the protrusion 3 of the slider 4 is inserted from the front end.
A spiral slit 6 for knocking, which communicates with the slit 18, and a slit 7 for communicating with the slit 6 for projecting the tip of the refill 2 from the tip of the outer cylinder 1.
And a circumferential slit 19 communicating with the slit 7, and an inner surface protrusion 20 is provided between the axial slit 18 and the spiral slit 6 (see FIG. 3 (a)).

The slider 4 and the rotary cap 5 are connected in a state in which the protrusion 3 of the slider 4 is inserted from the axial slit 18 of the rotary cap 5 and is fitted at a position beyond the inner surface protrusion 20. An annular groove is formed in a portion slightly rearward of the circumferential slit 19 of the rotary cap 5 and in an inner surface portion of the outer cylinder 1 which faces the slit 19 so that the rotary cap 5 is fitted to the outer cylinder 1 so as to be rotatable and axially immovable. 21 is an annular projection 22 on the other
Is provided. The groove 21 and the protrusion 22 do not have to be annular.

Further, an axial passage 8 for knocking is provided in the outer cylinder 1, a tip projecting passage 9 communicating with the passage 8 for allowing the tip of the refill 2 to project from the tip of the outer cylinder 1, and a shaft communicating with the passage 9. A directional passage 23 is provided, and an inner surface protrusion 24 is provided between the passages 23 and 9.

The rotation cap 5 is fitted into the rear portion of the outer cylinder 1 so that the projection 3 of the slider 4 connected thereto is fitted into the circumferential slit 19 so as to insert the projection 3 from the axial passage 23 of the outer cylinder 1. The annular cap 22 and the annular groove 21 are fitted to each other when the protrusion 3 crosses the inner surface protrusion 24, and the rotary cap 5 is rotatable with respect to the outer cylinder 1 and cannot move in the axial direction.

Needless to say, the height of the annular protrusion 22 and the depth of the annular groove 21 have such dimensions and shapes that the head 5a of the rotary cap 5 can be pulled backward from the outer cylinder 1 so as to be removed. In this way, in the case of the ballpoint pen, the refill 2 can be replaced when the ink is used up, and in the case of the mechanical pencil, the lead can be replenished.

In the case of this embodiment, the axial passage 8, the tip protruding passage 9, the axial passage 23, and the like are slits, but may be grooves, and the tip protruding slit 7 and the tip protruding passage 9 are In the illustrated example, the spiral directions are opposite to each other, but one of the slits 7 for protruding the tip may be a slit in the axial direction. When both are spirals in the opposite directions, it is preferable that the lengths thereof are shortened because the axial movement amount can be increased.

In the embodiment of the first invention having the above-mentioned structure, the fourth embodiment
As shown in FIG. 4A, when the protrusion 3 of the slider 4 is located at the starting ends of the slit 7 for tip protrusion and the passage 9 for tip protrusion, the head 5a of the rotary cap 5 is shown in FIG. 4B. When rotated in the forward direction (clockwise direction indicated by an arrow), the slider 4 fitted in the tip protrusion slit 7 and the tip protrusion passage 9 is inserted.
The protrusion 3 moves in the axial direction while moving in the circumferential direction along the slit 7 and the passage 9. This movement causes the slider 4 and the refill 2 to move forward until the step portion of the shaft body 16 forming the refill 2 contacts the inner step portion 15 of the outer cylinder 1 (see the phantom line in FIG. 1). , The tip 2a of the refill 2 projects from the tip of the outer cylinder 1 (see FIGS. 4A and 4B).

As shown in FIGS. 1 and 4, the refill 2 is moved quickly when the slit 7 for projecting the tip and the passage 9 for projecting the tip are spirals in mutually opposite directions, even if their lengths are short. Being told is easy to understand.

At this time, the protrusion 3 of the slider 4 is located at the end of the tip projecting slit 7 and the tip projecting passage 9, that is, at the starting end position of the knocking portion's spiral slit 6 and the knocking portion's axial passage 8. In the case of a ball-point pen, writing can be performed with a ball held at the tip 2a of the protruding refill 2.

In the case of a mechanical pencil, when the head portion 5a of the rotary cap 5 is further rotated in this position in the positive direction (clockwise direction indicated by an arrow) shown in FIG. Since the protrusions 3 of the slider 4 are in contact with each other, the protrusions 3 of the slider 4 move in the circumferential direction along the knock slit spiral slits 6 and are guided by the knock passage axial passages 8 to the front side of the refill 2. Is moved against the spring 10 constituting the above, and the rotational force on the head portion 5a of the rotary cap 5 is released to move backward by the spring force of the spring 10. A chuck that constitutes the refill 2 by repeating this operation.
11 is opened and closed, and by opening and closing the chuck 11, the core 12 can be fed from the tip 2a of the refill 2 by a predetermined length.
Writing is possible with the protruding core 12.

The protrusion 3 of the slider 4 is a spiral slit 6 for knocking.
And the protrusion 3 of the slider 4 when rotated in the opposite direction (counterclockwise) at the start end of the axial passage 8 for knocking, that is, at the end of the slit 7 for tip protrusion and the end point of the passage 9 for tip protrusion. Moves axially rearward while moving circumferentially along the slit 7 and the passage 9. By this movement, the tip portion 2a of the refill 2 is pulled in from the tip of the outer cylinder 1. At this time, the protrusion 3 of the slider 4 is at the starting point position of the slit 7 for tip protrusion and the passage 9 for tip protrusion.

As described above, according to the first embodiment, a compatible writing instrument having the same configuration, which can be used as both a rotary ballpoint pen and a rotary mechanical pencil by a rotating operation simply by exchanging the ballpoint pen refill and the mechanical pencil refill. Can be provided.

FIG. 5 is a vertical sectional view showing an embodiment of the second writing instrument of the present invention.

In this embodiment, one of the portion slightly rearward of the circumferential slit 19 of the rotary cap 5 in FIG. 1 and the inner surface portion of the outer cylinder 1 facing this, for example, a ring provided on the inner surface portion of the outer cylinder 1. The groove 21 is configured to be wider in the axial rear direction by the knock amount.

In the embodiment of the second invention having the above-mentioned structure, in the case of the ball-point pen, the tip portion of the refill 2 is exactly the same as above.
2a can be projected from the tip of the outer cylinder 1 and can be retracted (see FIGS. 4 (a) and 4 (b)).

In the case of a mechanical pencil, the head 5a of the rotary cap 5 is rotated in the forward direction (clockwise) with the tip 2a of the refill 2 protruding from the tip of the outer cylinder 1 as shown in FIG. 4 (b). Then, since the protrusion 3 of the slider 4 is in contact with the starting end of the axial passage 8 for the knocking allowance, the protrusion 3 of the slider 4
Moves in the circumferential direction along the spiral slit 6 for the knocking allowance and moves the rotary cap 5 backward by the knocking allowance. That is, since the annular projection 22 widens the inside of the annular groove 21 by the knocking allowance, the rotary cap 5 is moved backward by the knocking allowance (see FIG. 6).

When the rotary cap 5 is knocked in this state, the projection 3 of the slider 4 moves forward in the axial passage 8 for knocking, and the rotary cap 5, the slider 4 and the core tank 13 and the chuck 11 constituting the refill 2 are removed. The chuck 11 can be opened / closed by moving the spring 10 forward by the knock amount and by moving the spring 10 backward so that the core 12 can be fed by a predetermined length by opening / closing the chuck 11. . In order to retract the tip 2a of the refill 2, the head 5a of the rotary cap 5 may be rotated in the opposite direction.

As described above, according to one embodiment of the second aspect of the invention, even if a rotary ball-point pen having the same structure is used by a rotating operation, a knocking clearance is formed between the rear end of the outer cylinder and the cap head by the rotating operation. Therefore, it is possible to provide a compatible writing instrument that can be used as a rotary knock mechanical pencil that can be knocked.

In any of the embodiments of the present invention, the outer diameter of the outer cylinder 1 and the outer diameter of the head portion 5a of the rotary cap 5 are the same, and the outer cylinder 1
When the rear end and the head 5a of the rotary cap 5 are set in contact with each other, a writing instrument having a smart appearance can be provided.

In the present invention, it goes without saying that a clip may be provided on the outer cylinder 1 or the rotary cap 5. Furthermore,
At the end of the spiral slit 6 of the rotating cap 5, the third
As shown in FIG. 2B, a recess 25 into which the projection 3 fits and an inner surface protrusion 26 may be provided immediately in front of the recess 25.

〔The invention's effect〕

That is, according to the first writing instrument of the present invention, the writing instrument having the same configuration and being compatible with the ballpoint pen refill and the mechanical pencil refill can be used as a rotary ballpoint pen or a rotary mechanical pencil by a rotating operation. Can be provided.

Further, according to the second writing instrument of the present invention, even if the rotary ball-point pen has the same structure and is rotated by a rotating operation, a rotating operation creates a knocking clearance between the rear end of the outer cylinder and the cap head. It is possible to provide a compatible writing instrument that can also be used as a rotatable knock-type mechanical pencil.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a first writing instrument of the present invention, and FIGS. 2 (a) and 2 (b) are external views showing an example of a slider used in the present invention and their longitudinal sectional views, respectively. 3 (a) and 3 (b) are external views showing two examples of the rotary cap used in the present invention, and FIGS. 4 (a) to 4 (c) are front views for explaining the operation in the first invention and FIG. Is a longitudinal sectional view showing an embodiment of the second writing instrument of the present invention, and FIG. 6 is a front view for explaining the operation in the second invention. 1 ... Outer cylinder, 2 ... Refill, 2a ... Tip part, 3 ...
Protrusion, 4 ... Slider, 5 ... Rotating cap, 5a ... Head, 6 ... Spiral slit, 7 ... Slit for tip projection, 8 ... Axial passage, 9 ... Tip for tip projection, 10 ......
Spring, 11 …… Chuck, 12 …… Core, 13 …… Core tank, 14
...... Chuck ring, 15 …… Inner step, 16 …… Shaft, 21…
… Ring groove, 22… Ring protrusion.

Claims (6)

(57) [Claims] 1. A refill 2 is housed in an outer cylinder 1, a slider 4 having a projection 3 on the outer surface is fitted to the rear end of the refill 2, and the refill 2 is fitted into the slider 4 and is attached to the outer cylinder 1. A spiral slit 6 for the knocking allowance is provided in the rotary cap 5 which is fitted in the rear end portion so as to be rotatable and immovable in the axial direction.
And a tip projecting slit 7 communicating with the spiral slit 6 and projecting the tip of the refill 2 from the tip of the outer cylinder 1.
Is provided, and the outer cylinder 1 has an axial passage 8 for knocking, and the tip of the refill 2 communicated with the axial passage 8 at the outer cylinder 1
Is provided with a tip projecting passage 9 for projecting from the tip, and at least the tip projecting slit 7 and the tip projecting passage 9 are provided.
One of the two is made spiral and the slider 4
A writing instrument in which the projection 3 is slidably fitted in the spiral slit 6 and the axial passage 8 or in the slit 7 for tip protrusion and the passage 9 for tip protrusion. 2. The tip projecting slit 7 and the tip projecting passage 9 are formed in a spiral shape in mutually opposite directions.
Writing instrument described in paragraph. 3. The writing instrument according to claim 1, wherein the rear end of the outer cylinder 1 and the head 5a of the rotary cap 5 are set in contact with each other. 4. A refill (2) is housed in an outer cylinder (1), a slider (4) having a projection (3) on its outer surface is fitted to the rear end of this refill (2), and is fitted into this slider (4) and of the outer cylinder (1). The rotary cap 5, which is fitted to the rear end so as to be rotatable and movable in the axial direction by the knocking allowance, has a spiral slit 6 for the knocking allowance, and the tip of the refill 2 communicated with this spiral slit 6 and the outer cylinder. A slit 7 for projecting a tip is provided to project from the tip of the outer cylinder 1. An axial passage 8 for knocking is provided in the outer cylinder 1 and a refill 2 communicated with the axial passage 8.
Tip projection passage 9 for projecting the tip of the tube from the tip of the outer cylinder 1
And at least one of the slit 7 for tip protrusion and the passage 9 for tip protrusion is made spiral,
A writing instrument in which the projection 3 of the slider 4 is slidably fitted in the spiral slit 6 and the axial passage 8 or the slit 7 for tip protrusion and the passage 9 for tip protrusion. 5. The tip projecting slit 7 and the tip projecting passage 9 are spirally formed in opposite directions to each other.
Writing instrument described in paragraph. 6. The writing instrument according to claim 4, wherein the rear end of the outer cylinder 1 and the head 5a of the rotary cap 5 are set in contact with each other.