JP3281443B2 - Writing implement - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a quick-drying ink, and
The present invention relates to a writing instrument which uses a volatile ink to open and close a cap indirectly, and allows the pen tip to be completely sealed when the pen tip is stored by the cap.

[0002]

2. Description of the Related Art Conventionally, writing instruments using inks that are somewhat dry, such as volatile inks such as water-based inks and oil-based inks, have a cap or a cap to prevent drying of the pen core.
There is one in which a member called a cap is built in a writing barrel. Prior applications of this type include (a) Japanese Patent Application Laid-Open No. 58-52.
No. 99 (hereinafter (a)), (b) JP-A-59-15679
No. 8 (hereinafter (b)), (c) Japanese Utility Model Laid-Open No. 2-54987 (hereinafter (c)), and (d) Japanese Utility Model Application Laid-Open No. 2-58985 (hereinafter (2)). (A) is a cylindrical cap having one closed end, but the movement of the cylindrical cap depends on its own weight, so it is necessary to ensure that the cylindrical cap is attached to the pen tip when not in use and retracted when used. I have not done it.
In (b), a plate-shaped object such as a valve or a fold-shaped object is pressed to bring the pen tip into contact with the object and pushed open, so that the pen point of the writing portion is moved in and out. However, with this configuration, airtightness cannot be ensured, and valves and the like are soiled, resulting in damage to the pen tip of the writing section. (C) and (d) perform sealing by a valve, and the string is hung on the valve to always close or open. In such a configuration, it is difficult to hang a string at the time of assembling, and because the valve and the like are slightly pushed open with a pen tip, the valve is soiled, and the dirt on the valve makes it impossible to maintain the airtightness. To scratch the pen tip.

[0003]

As described above, conventionally, a pen point pushes and opens a cap such as a valve, so that
There is a drawback that the pen tip is damaged, and thereby the pen tip and a cap such as a valve covering the pen tip are soiled. Air-tightness is not a problem with an ink such as an oil-based ballpoint pen, but the use of a volatile ink as desired in the present application has the disadvantage that the air-tightness of the pen tip cannot be maintained. Therefore, the invention of the present application solves such a problem, and provides a writing implement that can securely maintain airtightness and is easy to assemble without preventing the nib from being damaged by a cap such as a valve that requires hermetic sealing.

[0004]

A retractable writing instrument provided with a pressing member 16 in which a locking piece 18 is provided at a rear portion of the cartridge 1 supported by a resilient member. A rotary cylinder 20 provided with a slide groove 2 on the peripheral surface of the cartridge 1 and a concave portion 3 on the rear end thereof and a window 21 for exposing the locking piece 18 is rotatably provided on the peripheral surface of the rear end of the cartridge 1, and an oblique guide groove on the outer surface. 10A and the thrust guide groove 10B guide groove 10 consisting of, on the inner surface provided with a guide tube 8 provided with ribs 9 that contacts the slide groove 2 in the middle peripheral surface of the cartridge 1, also rotates the cap 12 to the distal end And a resilient member 7 is disposed inside, and one is supported by a guide cylinder 8 and the other is supported.
Is supported by the middle step 26 inside the exterior body 23 and
The projection 5 is guided on the inner surface of the exterior body 23 guide piece induction
The cap support tube 4 provided with the guide piece 6 guided on the outer surface of the cap support tube 4 is provided on the intermediate peripheral surface of the cartridge 1, and the outer package 23 is provided in a radial direction with respect to the axis.
Is provided with a cap accommodating portion 25 having an R portion for guiding the cap 12.
2 is a writing implement characterized by being detachable from the pen tip of the cartridge 1 .

[0005]

The operation will be described based on the use of the writing instrument of the present invention. When the rotating cylinder 20 is rotated, the rotating cylinder 20 always has
Since the locking piece 18 is exposed from the window 21, the pressing member 16
Rotate together, and the pressing member 16 and the rear end of the cartridge 1 are in meshing contact with each other, and transmit this rotational power to the cartridge 1. Then, this time, the slide groove 2 provided on the outer peripheral surface of the cartridge 1 and the rib 9 provided inside the guide cylinder 8 are in meshing contact with each other.
Also rotate together. Then, the cap support tube 4 moves toward the distal end hole 24 of the exterior body 23 against the repulsive force of the resilient member 7 provided inside.
When moved, the cartridge 1 rotates while the cap 1
Remove 2 and release the airtightness. Along with this movement, the future cap 12 moves along the R portion provided on the exterior body 23 and is housed in the housing part 25. At this time, the guide groove 10 of the guide cylinder 8 includes an oblique guide groove 10A and a thrust guide groove 10B, and the projection 5 is located at the rearmost end of the oblique guide groove 10A in a state where the cap 12 is airtight. With the above rotation, the oblique guide groove 10A is moved and the thrust guide groove 10A is moved.
It will be located at the joint position with B.

Further, when the pressing member 16 is pressed from this state, the guide cylinder 8 moves together with the cartridge 1 in the distal direction, and the protrusion 5 moves to the rearmost end of the thrust guide groove 10B. If it moves to the forefront, the locking piece 18 rides over the locking projection 19, and the pen core from the exterior body 23 is kept exposed. At this time, the two resilient members 7 and 11 have the highest drag. Finally, in order to return the exposed pen core to its original position, when the locking piece 18 exposed from the window 21 is pressed, the locking projection 19 and the locking piece 18 are disengaged, and the exterior body 23 and the cap support cylinder 4 are removed. The cartridge 1 is pushed rearward by the force of a resilient member 11 provided between the cartridge 1 and the guide cylinder 8. Next, the cap 12 is moved from the accommodating portion 25 to the pen tip of the cartridge 1 by the reverse rotation of the rotary cylinder 20 and the reaction force of the resilient member 7 provided between the cap support cylinder 4 and the cartridge 1. And keep it airtight. At this time, the cartridge 1 is fitted to the cap 12 while twisting .

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described with reference to FIG. 1, FIG. 2, FIG. 3, FIG.
6, FIG. 7, FIG. 8, FIG. 9, FIG. 10, FIG. 11, and FIG. Reference numeral 1 denotes a cartridge provided with an occluding body or a liquid ink absorbing ink and having a pen tip at a tip. The cartridge 1 is provided with a concave portion 3 at a rear end portion at a position where two slide grooves 2 are opposed to each other on an outer peripheral surface. 4 is a cap supporting member 14
The cap support cylinder 4 is provided with a pair of projections 5 on the inner surface and a pair of guide pieces 6 on the outer surface. The cartridge 1 is resiliently supported by a resilient member 7 provided between the cap support cylinder 4 and the cartridge 1. Reference numeral 8 denotes a guide cylinder, in which ribs 9 are provided at a pair of opposed positions on the inner surface in the thrust direction between both open ends, and are formed on the outer surface with oblique guide grooves 10A and thrust guide grooves 10B. Guiding groove 10
Having. The rear end of the guide tube 8 is provided with a resilient member 1.
One of them is supported. The cap support tube 4 and the guide tube 8 are located at an intermediate portion of the cartridge 1 and cover the outside.

Reference numeral 12 denotes a shell-shaped cap having one open end, and a shaft 13 is stretched in the vicinity of the open end.
The cap 12 is fitted into the shaft hole 15 of the support member 14 and
Are rotatably supported. The cap 12 can be kept airtight to cover the pen tip of the cartridge 1 and prevent the pen tip from drying. Reference numeral 16 denotes a U-shaped pressing member having a hollow inside. The pressing member 16 is provided with a convex portion 17 at the tip, and meshes with and contacts the concave portion 3 provided at the rear end of the cartridge 1. A U-shaped locking piece 18 is disposed inside, and the locking piece 18 is provided inside the pressing member 16 to abut on the locking piece 18 to be maintained when the pen tip is exposed. Reference numeral 20 denotes a window 21 that exposes the action portion of the locking piece 18.
, And is rotatably fixed to the exterior body 23 by a fixed ring 22. As described above, reference numeral 23 denotes an exterior body in which the cartridge 1, the cap support cylinder 4, the resilient member 7, the guide cylinder 8, the cap 12, and the resilient member 11 are disposed, and the vicinity of the distal end hole 24, the axis line An accommodation portion 25 having an R portion for guiding the cap 12 in the radial direction is provided for accommodating the cap 12. The fixed ring 22 is screw-fitted to the rear end of the exterior body 23. Further, inside the exterior body 23, a step 28 is provided near the front end, a middle step 26 is provided near the middle, and a shelf 27 is provided near the rear end. A shaft guide groove 29 that guides the shaft 13 in the thrust direction with respect to the axis and a guide piece guide groove 30 that guides the guide piece 6 are provided. For these reasons, it is preferable that the exterior body 23 can be divided into two parts.

[0009] As for the material, since volatile ink is used, if each component is not affected by the ink,
It may be a synthetic resin product such as a thermosetting resin or a thermoplastic resin, or a metal product. In particular, since the cap 12 needs to be air-tight with the tip of the cartridge 1, a soft synthetic resin product is preferable. Next, regarding the method of using the writing instrument of the present invention, in the state I, the cap 12 and the cartridge 1 are kept airtight, and the protrusion 5 is also formed in the oblique guiding groove 10 of the guiding groove 10.
It is located at the lowermost end of A and is completely unused. In state II, the rotary cylinder 20 is rotated, and in state I
The protrusion 5 is located above the lowermost end of the oblique guide groove 10A. When the rotary cylinder 20 is rotated, the pressing member 1
6 and the cartridge 1 are also rotated. Then, the cartridge 1 and the guide cylinder 8 are guided by the slide groove 2 provided on the surface of the cartridge 1 and the rib 9 provided on the inner surface of the guide cylinder 8. When rotated, the guide cylinder 8 rotates, and the projection 5 of the cap support cylinder 4 moves forward by being guided by the oblique guide groove 10A. In the state II, the airtightness between the cap 12 and the cartridge 1 is released.

In the state III, the oblique guiding groove 10A is shifted from the state II.
And the protrusion 5 moves upward. When the projection 5 moves upward, the cap support cylinder 4 also moves upward,
The cap 12 provided at the tip of the cap support cylinder 4
Also push forward. Then, the cap 12 is guided to the R portion of the storage portion 25 provided on the exterior body 23 and is stored in the storage portion 25. Until this state III, the rotary cylinder 20 is rotated. Further, although the cartridge 1 rotates from the state I to the state III, the guide cylinder 8 and the cartridge 1 are resiliently supported by the resilient member 11, so that the
It does not move backwards and stays still in state I. In the state IV, when the pressing member 16 is pushed forward in the state III, the cartridge 1 itself is pushed forward, and the pen tip is exposed from the tip hole 24 of the exterior body 23. At this time, the projection 5 moves from the front to the rear in the thrust guide groove 10B and stops at the lowermost position. The locking piece 18 provided inside the pressing member 16 is provided with a locking projection 19.
Locked by. In this way, it is possible to maintain that the pen tip is exposed through the tip hole 24.

Finally, when the pen tip is no longer used, state I
Since the locking piece 18 is exposed from the window 21 of the rotary cylinder 20 from the state to the state IV, if the exposed part is pressed, the locking is released, and the state returns to the state III by the reaction force of the resilient member 11. Then, if the operation is performed in the reverse order from state III-> state II-> state I, airtightness can be maintained again.

[0012]

[Effects] The present application has the above configuration, and the following effects can be obtained. Instead of the pen tip pushing and opening the valve or cap,
Since the parts that require airtightness are not touched, airtightness can be released and airtightness can be reliably maintained many times. Since the rotary cylinder 20 rotates the cartridge 1 side to press-fit into the cap 1 to maintain airtightness, airtightness can be more reliably maintained than merely press-fitting. This is apparent from the fact that, in general, a large-diameter marker or the like is screwed into the cap to attach the cap, and the airtightness is maintained. Since the cap 1 is integrally provided inside, the form is convenient without losing the cap 1. Since the cap 1 is not supported by a string or the like, the assembly is simple and the assembly cost and the die cost can be reduced.

[0013]

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a first embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line AA of state I according to the first embodiment of the present invention.

FIG. 3 is a sectional view taken along the line BB of state I according to the first embodiment of the present invention.

FIG. 4 is a sectional view taken along the line AA in the state II according to the first embodiment of the present invention.

FIG. 5 is a sectional view taken along the line BB of state II according to the first embodiment of the present invention.

FIG. 6 is a sectional view taken along the line AA of the state III according to the first embodiment of the present invention.

FIG. 7 is a sectional view taken along the line BB in a state III according to the first embodiment of the present invention.

FIG. 8 is a sectional view taken along the line AA of the state IV according to the first embodiment of the present invention.

FIG. 9 is a sectional view taken along the line BB in a state IV according to the first embodiment of the present invention.

FIG. 10 is a front view of the cartridge 1 of the present invention.

FIG. 11 is a half sectional view of the cap support cylinder of the present invention.

FIG. 12 is a development view of the guide cylinder of the present invention.

[0014]

[Explanation of symbols]

 1: Cartridge 2: Slide groove 4: Cap support portion 5: Projection 6: Guide piece 7: Resilient member 8: Guide cylinder 10: Guide groove 10A: Oblique guide groove 10B: Thrust guide groove 11: Resilient member 12: Cap 13: Shaft 14: Supporting member 15: Shaft hole 16: Pressing member 17: Convex part 18: Locking piece 19: Locking projection 20: Rotating cylinder 23: Exterior body

Claims (1)

(57) [Claims] 1. A pressing member (1) having a locking piece (18) disposed inside a rear portion of a cartridge (1) resiliently supported by a resilient member.
6 is provided with a slide groove 2 on the peripheral surface of the cartridge 1, a concave portion 3 on the rear end, and a rotary cylinder 20 provided with a window 21 for exposing the locking piece 18 at the rear end of the cartridge 1. It is rotatably provided on the peripheral surface, and the oblique guide groove 10 is provided on the outer surface.
A guide tube 8 having a guide groove 10 comprising an A and a thrust guide groove 10B , and a rib 9 provided on the inner surface thereof with a rib 9 contacting the slide groove 2.
Is provided on the intermediate peripheral surface of the cartridge 1 , the cap 12 is rotatably supported at the tip, a resilient member 7 is disposed inside, and one is supported by the guide cylinder 8, and the other is
5 supported by the middle step 26 of the section and guided to the guiding groove 10
To the guide surface guide groove 30 of the exterior body 23
Cap support cylinder 4 provided with guide piece 6 to be guided on outer surface
Is provided on the intermediate peripheral surface of the cartridge 1, and the cap 12 is mounted on the exterior body 23 in the radial direction with respect to the axis.
The cap housing unit 25 having a R portion for guiding the provided cartridge cap 12 by the rotation of the rotary cylinder 20
A writing implement characterized by being detachable from the pen tip of the di 1 .