JP3283164B2 - Multi-core writing instrument - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multifilament writing tool in which three or more refills are arranged in a shaft cylinder and a writing body of the refill is selectively made to protrude from a front end opening of the shaft cylinder.

[0002]

2. Description of the Related Art Three or more refills are arranged in a shaft cylinder, such as one mechanical pencil refill and two or more ballpoint refills, and the writing material at the tip of the refill is selectively rotated. The multi-filament writing instrument which is written out by protruding and retracting from the tip opening of the cylinder does not interfere with the other refills near the tip opening of the barrel when one refill advances, so that it is immersed in the barrel. , The cursive body of each refill is located considerably inside the tip opening of the barrel. Therefore, in order for the writing body of one refill to protrude from the tip end opening of the barrel and to be able to write, a longer stroke is required as compared to a writing implement having one or two refills arranged in the barrel. .

[0003]

A multi-filament writing instrument having three or more refills disposed in a shaft cylinder is provided with a long hole equal to the number of refills on the side of the shaft cylinder to project each refill. A side-knock type multi-core writing instrument has been put to practical use in which projections are projected from these long holes, and one projection is advanced along the long hole with a fingertip to project a writing body. Although the writing instrument has a simple structure, it has a problem that is not suitable for giving a sense of quality.

[0004] For this reason, when the knock type in which the knocking cover protruding from the tail end of the barrel is pushed to extend the writing body, the stroke of the knock cover is protruded from the tail end of the barrel abnormally due to a long stroke. It is not preferable in designing a high-quality multi-core writing instrument.

Further, if the knocking system using the cap slide is used, an extraordinarily long knock cover projecting from the tail end of the barrel is not required, so that it is easy to give a sense of quality. There is a problem that it is difficult to slide the cap while holding it. And the cap slide type multi-core writing instrument,
Although a pendulum is built in and the tip of the pendulum presses a predetermined refill according to the inclination direction of the writing instrument, there is a problem that the reliability of the operation is low.

[0006] Next, among multi-core writing implements having two built-in refills, a rotary feeding type has been put to practical use in order to obtain a high-quality writing implement. This is to dispose a cam inside, and to rotate the rear shaft forward and reverse with respect to the front shaft so that the writing body of any refill projects from the opening at the tip of the barrel. In a multi-filament writing instrument with a built-in refill, the angle of the cam for projecting one refill is within 120 °, and it is almost impossible to obtain a long stroke within that angle. Has not been put to practical use.

Accordingly, an object of the present invention is to provide a multi-core writing instrument having three or more refills, which has high reliability of operation and is easy to give a sense of quality.

[0008]

In order to achieve the above object, a multifilament writing instrument according to the present invention has three or more refills arranged in a shaft cylinder comprising a front shaft and a rear shaft which are rotatably connected. In the multi-core writing instrument, a cam for selectively advancing the actuator with which the tail end of the refill abuts is fixedly arranged on the rear shaft, and a knock mechanism for further advancing the advanced actuator is provided in the barrel. When the rear shaft is rotated, the cam rotates and the handwriting of the refill is located near the inside of the tip opening of the barrel, and the type of refill that has been advanced is displayed on the barrel. When the knock cover protruding from the end opening is pressed, only the refill advanced by the cam advances, and the writing body of the refill projects from the tip opening of the barrel to enable writing.

[0009]

[Function] Since three or more refills are arranged in the shaft cylinder, a long stroke is required to cause the writing body of the refill to protrude from the front end opening of the shaft cylinder. This stroke is controlled by the cam and the knock mechanism. Because of the sharing, the knock cover protruding from the tail end opening of the barrel becomes short, and it is easy to give a sense of quality. Further, since the writing body is fed by the cam and the knock mechanism, high reliability can be obtained in the feeding operation.
In addition, since the type of refill that has been advanced by the cam is displayed, the user feels that the operation of rotating the rear shaft means selection of the refill, so that the operation of extending the cursive is only the knock mechanism, and the cursive There is no need to feel troubled with the delivery.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the embodiments shown in the drawings. In FIG. 1, a barrel 1 has a front shaft 12
And a rear shaft 11, and the front shaft 12 and the rear shaft 11 are rotatably connected. The barrel 1 has a front end opening 13 and a tail end opening 14. A total of three refills, one mechanical pencil refill 21 and two ballpoint pen refills 22 and 23 having different ink colors, are disposed in the barrel 1. The number of refills is four or more. It may be.

A cylinder 7 having three guide holes is fixed to the front shaft 12. The mechanical pencil refill 21 and the ballpoint pen refills 22 and 23 are accommodated in the guide holes of the cylinder 7 so as to be able to move back and forth. At the tail end of the refills 21, 22, 23, the actuators 31, 32,
33 are fitted respectively. And Refill 2
The operation springs 72 are resiliently pushed toward the tail end. The refills 21, 22, 23 have writing bodies 211, 221, 231 at their tips, respectively. As shown in FIG. 2, the cylinder 7 has a stepped portion 7 in a guide hole for accommodating the ballpoint pen refills 22 and 23.
1 is formed but mechanical pencil refill 2
No step is formed in the guide hole for accommodating 1 and the stroke of the operating element 31 is longer than the strokes of the operating elements 32 and 33. In order to feed out the pencil lead.

A cylindrical cam 5 is fixed to the rear shaft 11. At the lower end of the cam 5, as shown in FIG. 2, a mountain-shaped profile 51 is formed, and the cam 5 rotates to fit the profile 51 to one of the actuators, for example, the mechanical pencil refill 21. When the operator 31 comes into contact with the armature 31, the operator 31 advances along the slope of the profile 51, stops at the top of the profile 51 and stops.
At this time, as shown in FIG. 1, the writing body 211 of the mechanical pencil refill 21 is located near the inside of the distal end opening 13 of the barrel 1. A locking projection 52 is formed on the inner surface of the cam 5, and a substantially U-shaped guiding groove 53 is formed around the locking projection 52 as shown in FIG. 2.

Since the cylinder 7 in which the refills 21, 22, 23 are stored is fixed to the front shaft 12, the phase of the refills 21, 22, 23 with respect to the front shaft 12 is fixed, but the surface of the front shaft 12 is fixed. Marks (not shown) indicating the types of the refills 21, 22, 23 are printed at intervals of 120 ° in the vicinity of the connection with the rear shaft 11. on the other hand,
A mark (not shown) is also printed in front of the clip 8 on the surface of the rear shaft 11. For example, when the mechanical pencil refill 21 is advanced by the cam 5 as shown in FIG. Mark and the mark indicating the mechanical pencil of the front shaft 12 match. Conversely, if you want to write with a mechanical pencil, you need to replace the rear shaft 11 with the front shaft 12
And the mark printed on the rear shaft 11 and the front shaft 12
The markings indicating the mechanical pencil printed on the mechanical pencil 21 may be matched with each other.
Is located near the inside of the distal end opening 13 of the barrel 1. Thus, the user is required to connect the rear shaft 11 to the front shaft 12.
Rotating with respect to means that the refill to be used is selected. For example, it is usually that the writing body 211 of the mechanical pencil refill 21 moves forward and is located near the inside of the distal end opening 13 of the barrel 1. In this state, there is no consciousness that the cursive operation is being performed by this rotation.

The multifilament writing instrument of the present invention includes a knock member 4,
A knock mechanism including a knock cover 42, a knock spring 43, and the like is arranged. That is, the knock member 4 is disposed inside the cam 5 so as to be able to move back and forth, and the knock portion 41 protrudes from the lower end of the knock member 4. A knock cover 42 in which an eraser 44 is disposed is connected to the tail end of the knock member 4, and the knock cover 42 protrudes from the tail end opening of the barrel 1. And knock member 4
Are knocked toward the tail end by a knock spring 43.

A knock locking member 6 is arranged inside the knock member 4 so as to be movable in the radial direction. Then, as shown in FIG. 2, the knock locking member 6 is connected to the guide groove 53 of the cam 5.
It is fitted in. Therefore, although the knock member 4 rotates with respect to the front shaft 12 together with the cam 5, the knock locking member 6
Is normally located before and after the locking projection 52, the knock portion 4
1 corresponds to the profile 51 of the cam 5. Further, the tip of the knock portion 41 is notched in a mountain shape, and engages with the mountain-shaped tip of the actuator.

When writing with a mechanical pencil, for example, first, the rear shaft 11 is connected to the front shaft 12 as described above.
And the mark printed on the rear shaft 11 and the front shaft 12
The markings indicating the mechanical pencil printed on the pencil are matched with each other, and the writing body 211 of the mechanical pencil
Is located in the vicinity of the inside of the tip opening 13. Next, when a knocking operation of pressing the knock cover 42 is performed, the phase of the knocking portion 41 of the knocking member 4 is changed to the profile 5 of the cam 5.
Therefore, as shown in FIG.
1 further moves the operating element 31, and as shown in FIG. 3, the writing body 211 of the mechanical pencil
Projecting from the front end opening 13 while being locked to the step. At this time, as shown in FIG. 4, the knock locking member 6 gets over the locking projection 52 and locks on the front edge of the locking projection 52 to receive the pen pressure. Mechanical pencil refill 2
When the pencil lead is extended from the first writing body 211, a knock operation of pressing the knock cover 42 again may be performed.
Since the writing body 211 is locked at the stepped portion of the distal end opening 13 of the barrel 1, the result is the same as that of a normal pencil lead operation by knocking a mechanical pencil, and the pencil lead is extended.

When the writing body 211 is immersed in the front shaft 12 after the writing, the rear shaft 11 may be rotated slightly with respect to the front shaft 12. That is, this causes the knock member 4 to rotate together with the cam 5, but since the tip of the knock portion 41 cut out in a mountain shape is engaged with the mountain-shaped tip of the actuator 31, The start of rotation of the knock member 4 is delayed by the resistance, and only the cam 5 rotates slightly. That is, the knock member 4 rotates slightly with respect to the cam 5. Therefore, as shown in FIG. 4, the knock locking member 6 disposed in the knock member 4 is displaced laterally relative to the cam 5, moves in the direction shown by the arrow, and returns to the original position. Then, the state shown in FIGS. 1 and 2 is reached, and the writing body 211 is immersed in the front shaft 12. When writing with the ballpoint pen refills 22 and 23, the operation may be performed in exactly the same manner as described above.
The difference is only that the operation of feeding out the pencil lead is not performed.

[0018]

As described above, in the multi-core writing instrument of the present invention, the writing element is fed by first rotating the rear shaft with respect to the front shaft to advance the actuator by the cam, and then by the knock mechanism. Since the cursive body is further extended and the cursive is extended, high reliability can be obtained in the extending operation. Also, since three or more refills are arranged in the barrel, a long stroke is required to make the writing body of the refill protrude from the front end opening of the barrel, but the rear shaft is rotated with respect to the front shaft. Since the writing body is advanced in advance in the work of selecting the refill to be made, the stroke of the knock mechanism may be short, the knock cover projecting from the tail end opening of the barrel is short, and it is possible to provide a multi-core writing instrument that easily gives a sense of quality. it can.

[Brief description of the drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a developed view showing a relationship between a cam and an actuator.

FIG. 3 is a cross-sectional view illustrating a state in which the cursive body protrudes from a distal end opening of the barrel.

FIG. 4 is a developed view showing a relationship between a knock member and an actuator.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 Shaft tube 11 Rear shaft 12 Front shaft 13 Tip opening of shaft tube 14 Tail opening of shaft tube 21 Mechanical pencil refill 211 Mechanical pencil refill 22,23 Ballpoint refill 221, 231 Ballpoint refill 31,32, Reference Signs List 33 Actuator 4 Knock member 41 Knock part of knock member 42 Knock cover 43 Knock spring 5 Cam 51 Cam profile 52 Locking projection 52 Guide groove 6 Knock locking member 7 Cylinder 72 Operating spring 8 Clip

Claims (1)

(57) [Claims] 1. A multi-core writing instrument in which three or more refills are arranged in a shaft cylinder comprising a front shaft and a rear shaft rotatably connected, wherein the tail end of the refill abuts in the shaft cylinder. A cam for selectively moving the advanced actuator is fixed to the rear shaft, and a knock mechanism for further moving the advanced actuator is further disposed.When the rear shaft is rotated with respect to the front shaft, the cam rotates. The handwriting of the refill is located near the inside of the tip opening of the barrel, and the type of refill that has been advanced is displayed on the barrel,
When the knock cover protruding from the tail end opening of the barrel is pressed, only the refill advanced by the cam advances.
The cursive writing of the refill projects from the tip opening of the barrel,
A multi-core writing implement that can be written.