JPH0131518Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a writing instrument that effectively seals the writing part of the writing member when the writing part is placed in the stored state. This invention can be applied to writing instruments such as fountain pens, felt-tip pens, and ballpoint pens, but it is most effective when applied to writing instruments such as felt-tip pens and water-based ballpoint pens.

The applicant of this application places the writing portion of the writing member in the sealed state or in the writing state by knocking or rotating the seal cap, seal ball, etc., into or out of the sealing position. Various applications have already been filed (Japanese Patent Application No. 56-102238, Japanese Patent Application No. 137779, Japanese Utility Model No. 167109,
No. 56-167110, Jitsugan No. 57-52578, Jitsugan No. 57-
No. 55014). By the way, all of these things are
When operating the writing instrument, the tip side of the writing instrument must be facing down or the writing instrument must be placed in a horizontal position, making the operation cumbersome.

This idea made it easier to operate the writing instrument by allowing it to be operated no matter what state it was in.
The purpose is to provide this type of writing instrument.

Next, embodiments of this invention will be described with reference to the drawings.

FIG. 1 is a sectional view showing one embodiment of this invention. 1 is a shaft cylinder, and a sliding cylinder 2 is fitted inside the shaft cylinder 1. The rear part of the sliding tube 2 has an opposing position 2.
Slits 3, 3 are provided at the points from the rear. The tip of the sliding tube 2 is formed into a tapered shape, and a tip opening 4 is formed at the tip. A circular depression 5 is formed behind the tip opening 4, and a step 6 is formed behind the depression 5. Holes are made at two opposing positions slightly behind the stepped portion 6, and magnets 7, 7 are embedded in these holes, respectively. As shown in FIG. 2, the magnets 7, 7 have an S pole on the outside and an N pole on the inside.

As shown in FIG. 3, a ring body 8 with a rod-shaped rotating body 9 attached toward the rear from one end is prepared. The rotating body 9 is made of magnetic material, and the outside is N
It is magnetized to the pole, and the inside is magnetized to the S pole. The rear end side of the rotating body 9 is bent inward to form a hook piece 10. As shown in FIG. 1, after the ring body 8 is placed against the step 6 of the sliding tube 2, the protrusion 12 formed in the front of the guide body 11 as shown in FIG. 5 and fixed it. Projection part 12
A through hole 13 of a size corresponding to the tip opening 4 of the sliding tube 2 is bored at a position corresponding to the tip opening 4 of the sliding tube 2.
A guide hole 14 is formed at the rear of the through hole 13 in a direction perpendicular to the through hole 13. A sliding piece 15 is slidably fitted into the guide hole 14.
As is clear from Figure 5, which shows 5 from the rear,
The sliding piece 15 has an elliptical shape and a cap shape, and has a through hole 16 on one side with the center as the boundary.
is opened, and a seal cap 17 is fitted on the other side. The sliding piece 15 is made of a magnetic material, and the upper and lower parts are each magnetized to S poles, and the middle part is magnetized to N pole.

Although the writing member 18 is housed inside the sliding tube 2,
A small diameter portion 19 is formed in the front of the writing member 18, and a writing portion 20 is formed at the front end of the small diameter portion 19. A cylindrical body 21 is attached to the outer periphery of the writing member 18, and a cam groove 22 is formed on the outer periphery of the cylindrical body 21 as shown in the developed view of FIG. The cam groove 22 has a shape including two peaks, a shallow valley, and a deep valley, and the hook 10 of the rotating body 9 is fitted into the cam groove 22.

The connecting piece 23 is screwed into the rear end of the writing member 18 and attached, and the connecting piece 23 has legs 2 at two opposing positions.
4, 24, and then take out the legs 24, 24 from the slits 3, 3 of the sliding tube 2 and fit them into the rear end of the barrel 1, thereby connecting the barrel 1 and the writing member 18.
are connected. Then, by screwing the spring S into the rear end of the sliding tube 2 while fitting the spring S between the connecting piece 23 and the knock cap 25, the assembly of this embodiment is completed.

Although FIG. 1 shows the sealed state, the writing part 20 of the writing member 18 is sealed when the seal cap 17 is in a position that matches the tip opening 4 of the sliding tube 2 and the through hole 13 of the guide body 11. The cap 17 is sealed. At this time, the force in the direction of firmly fitting the seal cap 17 into the writing section 20 is obtained by the force of the spring S urging the sliding tube 2 rearward. Then, the hook piece 10 of the rotating body 9
is a shallow valley of the cam groove 22 of the cylindrical body 21. It is located at the position shown in Figure 6.

To change from the sealed state to the writing state, the knock cap 25 is clicked. The sliding tube 2 moves forward while compressing the spring S. At this time, the rotating body 9 also moves forward and the hook 10 is guided by the cam groove 22, so that the sliding tube 2 moves forward while rotating itself.
It comes to the position shown in Fig. 6, which is the peak of No. 2. This position is the position shown in FIG. 7, that is, the sliding tube 2
This is the position where the rotating body 9 is inserted into the position where the magnet 7 was attracting the sliding piece 15. By the way, since the rotating body 9 has an N pole on the outside and an S pole on the inside, and the sliding piece 15 has an S pole on both outside sides and a N pole in the middle, when the rotating body 9 cuts in, the rotating body 9 and The portions facing the sliding piece 15 form S poles to form a repulsive magnetic field, and the sliding piece 15 is therefore repelled to the opposite side. Since there is a magnet 7 on the opposite side,
The sliding piece 15 is attracted to the magnet 7 and is in the state shown in FIG. The through hole 16 is open. When the push on the lock cap 25 is released in this state, the sliding tube 2 is pushed back by the spring S, and
The writing portion 20 of the writing member 18 passes through the through hole 16 and protrudes from the tip opening 4 of the sliding tube 2, resulting in the writing state shown in FIG. 8. At this time, the hook piece 10 of the rotating body 9 is at the position shown in FIG. 6, which is the deep valley of the cam groove 22 of the cylindrical body 21. Continue writing in this writing state.

To change from the writing state to the sealed state, the knock cap 25 is knocked in the state shown in FIG. When the sliding tube 2 moves forward, the rotating body 9 rotates, and the rotating body 9 inserts itself between the magnet 7 and the sliding piece 15, which are attracted to each other, and repels the sliding piece 1 toward the other magnet 7. After skipping, the state shown in FIG. 9 is reached. At this time, the hook piece 10 of the rotating body 9 is in the position shown in FIG. 6, which is the peak of the cam groove 22. Here, when the push on the lock cap 25 is released, the sliding tube 2 is pushed back by the spring S and the seal cap 17 is moved toward the writing section 20.
cover it and return to the sealed state shown in Figure 1.

Although one embodiment of this invention has been shown above, the embodiment of this invention is not limited to the above. For example, although the cylindrical body 21 is shown fitted on the outer periphery of the writing member 18, the cam groove 21 is directly attached to the outer periphery of the writing member 18 without using the cylindrical body 21.
2 may be provided.

Further, the cam groove 22 may be provided on the rotating body 9 side instead of on the writing member 18 side. In this case, the rear part of the rotating body 9 is formed into a cylindrical shape, and a cam groove 22 is provided in the cylindrical part, and a protrusion or the like is provided on the side of the writing member 18 or the barrel 1. Fit it into the cam groove 22 of the rotating body 9. Shaft tube 1
When providing a protrusion, etc. facing inward to the sliding tube 2,
After forming a slit in the slit and passing the slit through the slit, the protrusion or the like is fitted into the cam groove 22 of the rotating body 9. Since the protrusions are fitted into the slits, they do not interfere with the forward and backward movement of the sliding tube 2. In any case, a suitable cam mechanism is provided between the side where the shaft tube 1 and the writing member 18 are connected and the side of the rotating body 9, and the cam mechanism causes the rotating body 9 to move when the sliding tube 2 moves forward or backward. It just needs to be able to rotate. Furthermore, any method may be used for attaching the rotary body 9 to the sliding tube 2 so that it can rotate freely but not move back and forth. Furthermore, although the sliding tube 2 is moved forward by a notch, the sliding tube 2
The movement forward and backward may be performed by rotation or the like.

Note that in the illustrated embodiment, the writing member 1
There is an air hole at the base of the tip opening 20 of the cap 8, and in the sealed state shown in FIG. 1, the seal cap 17 seals both the writing part 20 and the air hole. If it is located behind the tip of the member 18, the tip opening 4 of the sliding tube 2 is sealed by the sliding piece 15 and the guide body 11 in the sealed state, and the tip opening 4 of the sliding tube 2 is sealed in the sealed state from the position where the air hole is located. It is necessary to provide a seal ring or the like between the sliding tube 2 and the writing member 18 at the position for sealing.

As is clear from the above, in the writing instrument according to this invention, when the sliding tube 2 is moved forward or backward, there is a The cam mechanism works, and the rotating body 9 rotates and inserts itself between the magnet 7 of the sliding tube 2 and the sliding piece 15, and the sliding piece 5 and the rotating body 9
By generating a repulsive magnetic field between the slide tube 2 and the slide tube 2, the slide tube 2
A through hole 16 of the sliding piece 15 is located at the position of the tip opening 4 of the sliding piece 15.
The writing part 20 of the writing member 18 is made to protrude from the through-hole 16 to the tip opening 4 so that the writing part 20 is in a writing state, or the writing part 20 is inserted into the seal cap 17 so that the writing part 20 comes out. I try to keep it in a sealed state. No matter what state the writing instrument is in, just by moving the sliding tube 2 forward or backward, it can be automatically put into the writing state or the sealing state, so it is extremely easy to operate. .

[Brief explanation of the drawing]

1, 7, 8, and 9 are sectional views showing the operation of one embodiment of this invention, and FIG.
3, 4, 5, and 6 are a sectional view, a perspective view, a partially cutaway perspective view, a side view, and a developed view of the main parts of the embodiment, respectively. 1... Shaft tube, 2... Sliding tube, 4... Tip opening, 7...
Magnet, 9... Rotating body, 11... Guide body, 15... Sliding piece, 17... Seal cap, 18... Writing member, 2
0...Writing section.

Claims (1)

[Scope of utility model registration request] A sliding tube 2 with a tip opening 4 formed at the tip is accommodated in the shaft tube 1, and a writing section 20 at the tip is housed inside the sliding tube 2.
The writing member 18 is accommodating the writing member 18 formed with the writing member 18.
is connected to the shaft cylinder 1 side, and a guide body 11 is provided near the inner tip of the sliding cylinder 2, and a sliding piece 15 is accommodated so that it can slide in a direction perpendicular to the axial direction by the guide body 11. , a writing member 18 is attached to the sliding piece 15.
The through hole 16 through which the writing part 20 passes through and the writing part 2
In addition, the sliding piece 15 is equipped with a magnet on the outer periphery, and the sliding piece 15 is also provided with a magnet in the direction in which it slides on the sliding tube 2. A magnet 7 is attached at each position so that the outer pole of the magnet of the sliding piece 15 and the inner pole of the magnet 7 of the sliding tube 2 are different from each other. A rotating body 9 that rotates while sliding on the inner surface of the sliding tube 2 is attached to the outer periphery.The rotating body 9 is also equipped with a magnet, and the inner pole of the magnet is the same as the outer pole of the sliding piece 15. A cam mechanism is provided between the side where the shaft tube 1 and the writing member 18 are connected and the side of the rotating body 9, and when the sliding tube 2 moves forward and backward, the cam mechanism moves the rotating body. A writing instrument with rotating number 9.