JP2010036535A - Multi-refill writing utensil - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a multi-refill writing utensil which can be offered at low cost to a user by suppressing the cost increase of a component of a manipulator. <P>SOLUTION: This multi-refill writing utensil is of the structure described below. A stem part 4 extending in the axial direction is arranged in the barrel center of the barrel 2. The other end of the stem part 4 is arranged in diametrically displaceable fashion. An engagement part 41 and a regulatory part 42 are fitted by diametrically projecting on the outer circumferential surface of the end part of the stem part 4 which is diametrically displaceable. A cartridge-like part 5 is fitted, in diametrically displaceable fashion, to the stem part 4 between the engagement part 41 and the regulatory part 42. When a pen point 71 of one of the writing elements 7 is way out of the forward end hole 21a, a manipulator 8 of the writing element 7 whose pen point is projected, is engaged with the engagement part 41. When the manipulator 8 of the other writing element 7 whose pen point is retracted, is slid forward, the engagement of the manipulator 8 of the writing element 7 whose pen point is first, way out, with the engagement part 41 is removed by displacing the engagement part 41 or the cartridge-like part 5 in the diametral direction by the manipulator 8 of the other writing element 7. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a multi-core writing instrument. More specifically, the present invention relates to a multi-core writing instrument that houses a plurality of writing bodies in a shaft cylinder and selectively causes the pen tip of each writing body to appear and disappear.

Conventionally, in this type of multi-core writing instrument, Patent Document 1 discloses that the cam part of the swinging member is moved in the radial direction by moving the writing body in the pen tip immersive state forward, thereby leading to the tip of the pen tip first. A structure is described in which the locked state of the slider of the cursive body in the protruding state and the tip of the knock cylinder is released. Further, Patent Document 1 describes that each slider has two cam surfaces that can be engaged with the cam portion and swing the cam portion in different directions.
Japanese Patent Laid-Open No. 11-180092

In the multi-core writing instrument of Patent Document 1, each slider (corresponding to the operation body of the present application) has two cam surfaces, so the slider has a special shape, and thus an operation body having a general shape (that is, an operation body). It is difficult to adopt a type in which the bodies directly contact each other to release the pen tip protruding state, and as a result, there is a risk that the cost of parts of the operating body increases.

Further, in the conventional multi-core writing instrument, generally, as the number of writing bodies accommodated in the shaft cylinder increases, the outer diameter of the shaft cylinder increases, and as a result, the radial length of the operating body (that is, the operating portion) And the release protrusions in the radial direction), and a multi-core writing instrument (for example, a multi-core writing instrument having two to three cursive letters) containing a relatively small number of cursive letters, and accommodating the cursive letters. It is difficult to make the shape of the operation body common with a large number of multi-core writing instruments (for example, multi-core writing instruments having 4 to 5 writing bodies).

The present invention solves the above-mentioned conventional problems, and can employ a generally shaped operating body, and even a multi-core writing instrument having a large number of cursive letters can accommodate a large number of cursive letters. An object of the present invention is to obtain a multi-core writing instrument that can be provided to a user at a low cost by suppressing an increase in the component cost of the operation instrument, since the shape of the operation instrument can be made common to a few multi-core writing instruments. In the present invention, “front” refers to the pen tip side, and “rear” refers to the opposite side.

[1] In the first invention of the present application, a plurality of writing bodies 7 are accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction, and each of the writing bodies 7 is urged rearward by a resilient body 9, The operating body 8 is connected to the rear end of each writing body 7, and a plurality of window holes 22a extending in the front-rear direction are provided in the side wall of the shaft cylinder 2 in the radial direction, and radially outward from the respective window holes 22a. Each operating body 8 is protruded to one side, and one operating body 8 is slid forward along the window hole 22a, whereby the nib 71 of the writing body 7 connected to the one operating body 8 is moved to the shaft cylinder. 2 is a multi-core writing instrument that protrudes from the front end hole 21a and immerses the pen tip 71 of the other writing body 7 that has been in the protruding state into the shaft tube 2, and the shaft center of the shaft tube 2 A shaft portion 4 extending in the axial direction is provided, one end of the shaft portion 4 is fixed to the inner wall of the shaft tube 2, and the other end of the shaft portion 4 is changed in the radial direction. A locking portion 41 is provided in a radially projecting manner on the outer peripheral surface of the end portion of the shaft portion 4 that is displaceable in the radial direction, and a regulating portion 42 is provided on the outer peripheral surface of the shaft portion 4 in front of the locking portion 41. Projecting in the radial direction, the cylindrical body 5 is attached to the shaft portion 4 between the locking portion 41 and the restricting portion 42, and the cylindrical body 5 is provided to be displaceable in the radial direction relative to the shaft portion 41. When the pen tip 71 of one writing body 7 is protruding from the front end hole 21a, the operating body 8 connected to the rear end of the writing body 7 in the protruding state of the pen tip is engaged with the locking portion 41. When the operating body 8 connected to the rear end of the other writing body 7 in the pen-tip immersion state is slid forward from this state, the operating body of the other writing body 7 slid forward. 8 is in contact with the locking portion 41 or the cylindrical body 5 and is displaced in the radial direction while the locking portion 41 or the cylindrical body 5 is displaced. So it makes the previously requirements to become to release the locked state of the operation member 8 connected to the rear end of the writing body 7 in the pen tip protrudes with said locking portion 41.

The multi-core writing instrument 1 according to the first aspect of the present invention does not require the operating body 8 to have a special shape, and can employ a general-shaped operating body 8, which employs a general-shaped operating body 8. Even if the multi-core writing instrument and the operation body 8 can be used in common, and the multi-core writing instrument has a relatively large number of the writing bodies 7 and a relatively large outer diameter of the shaft tube 2, the number of the writing bodies 7 can be accommodated. The multi-core writing instrument and the operation body 8 that are relatively small and have a relatively small outer diameter of the shaft tube 2 can be used in common. Therefore, the multi-core writing instrument 1 according to the first aspect of the present invention can suppress the increase in the component cost of the operation body 8 and can be provided to the user at a low cost.

[2] According to a second invention of the present application, in the first invention, each operation body 8 protrudes radially outward from the window hole 22a of the shaft tube 2, and the operation portion 81. A first release protrusion 82 positioned radially inward of the operation portion 81, and a second release protrusion 83 positioned inward of the operation portion 81 in front of the first release protrusion 82. When the pen tip 71 of one writing body 7 is in a protruding state from the front end hole 21a, the operating body 8 connected to the rear end of the writing body 7 in the protruding state of the pen tip is locked to the locking portion 41. In addition, the first release protrusion 82 of the operating body 8 connected to the rear end of the writing body 7 in the pen tip protruding state is disposed between the locking portion 41 and the restricting portion 42. Is a requirement.

According to the multi-core writing instrument 1 of the second invention, the first release protrusion 82 of the operating body 8 connected to the rear end of the writing body 7 in the pen tip protruding state is provided with the locking portion 41 and the restriction. By being arranged between the portions 42, the proper locking state between the operating body 8 connected to the rear end of the writing body 7 in the pen tip protruding state and the locking portion 41 is maintained.

[3] According to a third invention of the present application, in the first or second invention, the elastic body 9 that biases each of the writing bodies 7 backward is supported on the inner wall of the shaft tube 2 and The elastic body 9 support 3 through which the inner hole 31 through which the writing body 7 can be inserted is fixed, the front end of the shaft portion 4 is fixed to the rear axis of the elastic body support 3, The shaft portion 4 protrudes rearward from the rear end of the projectile support 3 and the locking portion 41 and the restricting portion 42 are integrally formed at the rear end portion of the shaft portion 4. It is a requirement that the cylindrical body 5 be attached between the locking portion 41 and the regulating portion 42 when the inner surface of the cylindrical body 5 gets over either the outer surface of the cylindrical portion 5 or the outer surface of the regulating portion 42.

The multi-core writing instrument 1 according to the third aspect of the present invention can suppress an increase in the number of parts and an increase in assembly steps as much as possible, and can prevent an increase in manufacturing cost.

[4] In a fourth invention of the present application, in the first, second, or third invention, the writing body 7 is removed from the shaft cylinder 2 in a state where the operating body 8 is connected to the rear end of the writing body 7. It is a requirement that it can be taken out and inserted into the shaft cylinder 2 and that four or more writing bodies 7 are accommodated in the shaft cylinder 2.

The multi-core writing instrument 1 according to the fourth aspect of the invention is capable of taking out the writing body 7 from the shaft cylinder 2 and inserting it into the shaft cylinder 2 with the operating body 8 connected to the rear end of the writing body 7. A multi-core writing instrument having a shaft cylinder 2 that can accommodate only two or three writing bodies 7 by accommodating four or more writing bodies 7 in the shaft cylinder 2, and operation of a common shape Since the body 8 can be used, when exchanging the writing body 7 in a state where the operating body 8 is connected, it is not necessary to distinguish the type of the shape of the operating body 8 and the replacement work of the writing body 7 becomes easy.

In the present invention, examples of the writing body 7 include a ballpoint pen, a marking pen, and a mechanical pencil. In the present invention, the shaft cylinder 2 may be composed of a front shaft provided with a front end hole 21a from which the pen tip 71 of the writing body 7 can protrude and a rear shaft provided with a window hole 22a on the side wall. Further, in the present invention, the number of the writing bodies 7 accommodated in the shaft tube 2 may be two or more, and specifically, 2, 3, 4, 5, 6, etc. may be mentioned. It is done. In the multi-core writing instrument of the present invention, the number of writing bodies accommodated in the shaft cylinder 2 in that the multi-core writing instrument having a shaft cylinder capable of accommodating only two or three writing bodies and the operation body can be made common. Is preferably 4 or more.

The present invention can adopt an operation tool having a general shape, and even if it is a multi-core writing instrument having a large number of cursive letters, the shape of the operation tool can be made common to a multi-core writing instrument having a small number of cursive letters. As a result, it is possible to suppress the increase in the cost of parts of the operating body and to provide the user with low cost.

1 to 14 show an embodiment of the present invention.
In the multi-core writing instrument 1 of the present embodiment, a plurality (specifically, four) of writing bodies 7 are accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction. Each of the writing bodies 7 is urged rearward by an elastic body 9 (specifically, a compression coil spring).

(Shaft tube)
The shaft cylinder 2 includes a tapered cylindrical front shaft 21 and a cylindrical rear shaft 22 connected to the rear end of the front shaft 21. In the present embodiment, the front end of the projectile support 3 is fixed to the rear end opening of the front shaft 21, and the rear end of the projectile support 3 is fixed to the front end opening of the rear shaft 22. Is done. The rear end of the front shaft 21 and the front end of the rear shaft 22 are connected by the projectile support 3.

A front end hole 21a through which the pen tip 71 of each writing body 7 can protrude is provided in the front end axis of the front shaft 21 in the axial direction. The front shaft 21 and the rear shaft 22 are obtained by injection molding of a synthetic resin (for example, polycarbonate).

A plurality of (specifically, four) elongated window holes 22 a extending in the front-rear direction are provided in a radial direction on the side wall of the rear portion of the rear shaft 22. The four window holes 22a are formed at positions rotated 90 degrees in the circumferential direction. A clip 22d is provided on one side wall of the rear shaft 22 between the window hole 22a and the window hole 22a.

(Cover)
The rear end of each of the window holes 22a is formed with an opening 22b that opens in a cutout shape behind the rear end of the shaft cylinder 2. At the rear end of the shaft cylinder 2 (rear end of the rear shaft 22), a lid portion 6 that allows the opening 22b to be opened and closed is provided. The lid portion 6 is rotatably attached to the hinge portion 63. An abutting wall portion 61 is formed on the front surface of the lid portion 6. The rear end of each operation body 8 connected to the rear end of the immersed writing body 7 is brought into contact with the contact wall portion 61. (See FIGS. 11 and 12)

An engagement portion 62 (specifically, an engagement hole) is provided on the front surface of the lid portion 6, and an engaged portion that can be engaged with the engagement portion 62 is provided at the rear end of the rear shaft 22. 22c (specifically, an engaging protrusion) is provided. The engaging portion 62 and the engaged portion 22c are in an engaged state when the lid portion 6 closes the opening portion 22b, and the operating body 8 and the lid by urging the projecting body 9 backward. In contact with the contact wall portion 61 on the front surface of the portion 6, the engaged state is not released and the lid portion 6 does not open.

(Bullet support)
A cylindrical projectile support 3 is fixed to the inner wall of the shaft cylinder 2 (that is, the inner wall of the rear end opening of the front shaft 21 and the inner wall of the front end opening of the rear shaft 22). As shown in FIGS. 13 and 14, the bullet support body 3 has a plurality of (specifically, four) inner holes 31 through which the writing body 7 is inserted in the axial direction. A bullet body 9 is disposed between the rear surface of the bullet body support 3 and the front surface of the collar portion 85 of each operation body 8. The cursive body 7 is loosely inserted in each of the projectiles 9, and the front end of each projectile body 9 is locked by the rear surface of the projectile support 3, and the rear end of each projectile body 9. Is locked to the front surface of the collar portion 85 of the operating body 8. The projectile support 3 is obtained by injection molding of synthetic resin.

Further, around each inner hole 31 on the rear surface of the projectile support 3, a holding portion 32 made of a cylindrical projecting portion projecting rearward is formed. The inner surface of each holding portion 32 is press-fitted and held at the outer surface of the front end portion of each bullet member 9. Thereby, when each writing body 7 and the operation body 8 are replaced, it is possible to prevent each of the projectile bodies 9 from dropping out of the shaft cylinder 2 through the opening 22b.

In addition, four partition walls 33 are formed at the rear end of the holding portion 32 so as to avoid contact between the respective bullets 9. Each of the partition walls 33 extends axially rearward from the rear end of the holding portion 32.

(Shaft)
A shaft portion 4 is fixed to the axial center of the rear end surface of the projectile support 3 (that is, the rear end surface axial center of the partition wall 33). Specifically, a mounting hole 34 is formed in the axial center of the rear end surface of the elastic body support 3, and is press-fitted and fixed to the front end of the shaft portion 4 in the mounting hole 34. The shaft portion 4 is a rod-like body made of synthetic resin or metal and extending in the axial direction, and can be bent and deformed in the radial direction (elastically deformable in the radial direction). The front end portion of the shaft portion 4 is press-fitted and fixed in the mounting hole 34, and the rear end portion of the shaft portion 4 can be displaced in the radial direction by bending deformation of the shaft portion 4 itself. The outer surface of the rear end portion of the shaft portion 4 includes a locking portion 41 made of an annular protrusion (specifically, a disk-like protruding portion) and an annular bulging portion disposed in front of the locking portion 41. The restricting portion 42 is integrally formed. An inclined surface 43 whose outer diameter gradually increases toward the rear is formed on the front surface of the restricting portion 42.

(Cylinder)
The cylindrical body 5 is attached between the locking portion 41 and the restricting portion 42 (that is, in front of the locking portion 41 and behind the restricting portion 42) so as to be movable in the radial direction. The said cylinder 5 consists of a cylindrical body which consists of a synthetic resin or a metal, and an inner hole is penetrated by the axial direction. Before the shaft portion 4 is fixed to the axial center of the rear end surface of the elastic body support 3, the front end of the shaft portion 4 is inserted into the inner hole of the cylindrical body 5, and the outer surface of the restricting portion 42 is connected to the cylinder. The cylinder 5 is attached between the locking portion 41 and the restricting portion 42 by the body 5 getting over the rear.

The inner diameter of the cylindrical body 5 (that is, the inner diameter of the inner hole of the cylindrical body 5) is smaller than the outer diameter of the locking portion 41 and smaller than the outer diameter of the restricting portion 42 (that is, the inner diameter of the cylindrical body 5 <the relationship The outer diameter of the stopper 41 and the inner diameter of the cylinder 5 <the outer diameter of the restricting portion 42). Thereby, dropping of the cylinder 5 to the rear of the locking portion 41 and the front of the restricting portion 42 is prevented.

The outer diameter of the cylindrical body 5 is formed smaller than the outer diameter of the locking portion 41. Accordingly, the first release protrusion 82 of the operating body 8 connected to the writing body 7 in the pen tip protruding state is accommodated between the locking portion 41 and the restriction portion 42, and the first release protrusion In a state where the cylindrical body 5 is pressed radially outward by 82 (see FIG. 6), it is possible to prevent the cylindrical body 5 from greatly protruding from the engaging portion 41 in the radial direction, and the writing body 7 in the pen tip immersive state. The smooth operation of the other operating body 8 connected to is not hindered.

The inner diameter of the inner hole of the cylindrical body 5 is formed larger than the outer diameter of the shaft portion 4 between the locking portion 41 and the restricting portion 42. Thereby, the shaft portion 4 between the locking portion 41 and the restricting portion 42 is loosely inserted into the inner hole of the cylindrical body 5, and the cylindrical body 5 is displaced in the radial direction with respect to the shaft portion 4. It is possible (movable in the radial direction).

(Bullet)
Each of the projectile bodies 9 always urges each operation body 8 (that is, each writing body 7) backward. Each of the bullets 9 is in a compressed state (that is, a state in which the writing body 7 is urged rearward) in both the pen tip protruding state and the pen tip immersing state. Shaking back and forth is prevented.

(Cursive)
Each of the writing bodies 7 is a ball-point pen refill, and includes a ball-point pen tip (that is, a pen tip 71) in which a ball is rotatably held at the front end, and an ink container provided with the ball-point pen tip at the front end and opened at the rear end. Tube 72. Inside the ink storage tube 72, water-based gel ink having shear thinning viscosity, low-viscosity water-based ink, low-viscosity oil-based ink, or ink composed of high-viscosity oil-based ink is stored. When the ink is a water-based gel ink having shear thinning viscosity, a low-viscosity water-based ink, or a low-viscosity oil-based ink, a high-viscosity fluid that advances as the ink is consumed is disposed at the rear end of the ink in the ink containing tube 72. A follower consisting of is filled.

Further, the ballpoint pen tip may be configured such that a ball held rotatably at the front end is urged forward by a projectile or the like, and the ball is brought into close contact with the inner surface of the front end edge portion. Further, the ballpoint pen tip may be directly attached to the front end opening of the ink containing tube 72 by press fitting or the like, but in this embodiment, it is fixed to the front end opening of the ink containing tube 72 via the pen tip holder.

(Operation body)
An operation body 8 is attached to the rear end of each of the writing bodies 7 (that is, the rear end opening of the ink containing tube 72). Each of the operating bodies 8 includes an operating portion 81 that is formed at the rear end and protrudes to the outside from the window hole 22 a of the shaft cylinder 2, and a first release protrusion 82 that is provided on the radially opposite side of the operating portion 81. And a second release protrusion 83 provided in front of the first release protrusion 82 on the opposite side of the operation portion 81 in the radial direction, and formed in the front end portion and fitted into the rear end opening of the ink containing tube 72. A fitting portion 84 and a flange portion 85 formed behind the fitting portion 84 are provided. The insertion portion 84 does not completely block the rear end opening of the ink storage tube 72 when inserted into the rear end opening of the ink storage tube 72, and can vent the inside and the outside of the ink storage tube 72. To. The rear end of the projectile 9 is locked to the front surface of the flange portion 85. Further, locking projections 86 are formed on both side surfaces of the operating body. The locking projection 86 is engageable with both side walls of the window hole 22a. The operation body 8 is obtained by a molded body of a synthetic resin (for example, polypropylene resin, ABS resin, polyacetal resin, etc.).

(Immersion state of the nib)
When the pen point 71 of the writing body 7 is in an immersed state, the rear end portion of the operation body 8 attached to the writing body 7 is a contact wall formed at the rear end of the window hole 22a (that is, the front surface of the lid portion 6). Part 61 is hit.

(The pen tip protrudes)
On the other hand, when the pen point 71 of the writing body 7 is in the protruding state, the rear end portion of the operating body attached to the writing body 7 is the locking portion 41 (that is, the shaft portion 4 fixed to the inner wall of the shaft tube 2 (that is, It is locked to the locking portion 41 front surface).

(Intrusion operation of the nib)
A description will be given of the operation of moving the pen tip 71 in the present embodiment.

・ Release operation 1
7 and 8, the writing body 7 in the pen tip protruding state is adjacent to another writing body 7 in the adjacent pen tip immersing state (that is, the writing body 7 in the pen tip protruding state first). The case where the operation body of the writing body 7) in the position 90 degree apart in the circumferential direction of the axial cylinder 2 is pushed forward is shown. The front surface (that is, the inclined front surface) of the second release projection 83 of the operation body of the other writing body 7 that has been pressed is in contact with the outer peripheral edge of the locking portion 41, and the locking portion 41 is the axis of the shaft cylinder 2. It is pressed and displaced radially outward from the center. As a result, the locked state between the operating body 8 connected to the writing body 7 in the pen tip protruding state and the locking portion 41 is released. In order to project the pen tip 71 of the other pressed body 7 that has been pressed, the pressing operation is continued, and the operating body 8 connected to the other pressed body 7 is locked to the locking portion 41. Then, the pen point 71 of the cursive body 7 that has been pressed is brought into a protruding state.

・ Release operation 2
9 and 10, the writing body 7 in the pen tip protruding state is different from the writing body 7 in the pen tip immersion state on the opposite side in the radial direction (that is, the writing body 7 in the pen tip protruding state first). The case where the operation body 8 of the writing body 7) located at a position 180 degrees apart in the circumferential direction of the shaft cylinder 2 is pressed forward is shown. After the first release protrusion 82 of the operation body of the other writing body 7 subjected to the pressing operation has passed over the locking portion 41, the cylinder body 5 is pressed radially outward, and the cylinder body 5 is First, the first release protrusion 82 of the operating body 8 of the writing body 7 in the pen tip protruding state is pressed radially outward. As a result, the locked state between the operating body 8 and the locking portion 41 connected to the writing body 7 in the locked pen tip protruding state is released. In order to make the pen point 71 of the other pressed writing body 7 project, the pressing operation is continued, and the operating body 8 connected to the other pressed writing body 7 is locked to the locking portion 41. Then, the pen point 71 of the cursive body 7 that has been pressed is brought into a protruding state.

(Replace cursive and operating body)
The replacement of the writing body 7 and the operation body 8 in the present embodiment will be described. (See FIGS. 11 and 12)
When exchanging the cursive body 7, from the state in which the lid 6 closes the opening 22b at the rear end of the shaft tube 2, the operation end opposite to the hinge 63 of the lid 6 is pressed backward to engage. The engagement between the portion 62 and the engaged portion 22c is released, the lid portion 6 is rotated rearward, and the opening 22b at the rear end of the shaft tube 2 is opened. When the operating body 8 is taken out with the opening 22b at the rear end of the shaft cylinder 2 open, the writing body 7 connected to the operating body 8 is connected to the inside of the shaft cylinder 2 through the opening 22b. Then, a new writing body 7 and a new operation body 8 that are connected to each other are inserted into the shaft cylinder 2 through the opening 22b. Then, each operation body 8 is brought into contact with the contact wall portion 61 of the lid portion 6, and the lid portion 6 is rotated forward while pressing each operation body 8 forward. The engaged portion 22c is engaged, and the opening 22b is closed. Thereby, the exchange work of the writing body 7 and the operation body 8 is completed.

It is a front view of embodiment of the multi-core writing instrument of this invention. FIG. 2 is an enlarged plan view of FIG. 1. It is a longitudinal cross-sectional view in which all the nibs of FIG. 1 are immersed. FIG. 4 is an enlarged vertical cross-sectional view of a main part of FIG. 3. It is a longitudinal cross-sectional view of the pen tip protruding state of the multi-core writing instrument of FIG. FIG. 6 is an enlarged vertical sectional view of a main part of FIG. 5. It is a longitudinal cross-sectional view which follows the AB line | wire of FIG. 2 for demonstrating cancellation | release operation 1. FIG. It is a principal part perspective view explaining cancellation | release operation 1. FIG. It is a longitudinal cross-sectional view which follows the AC line of FIG. 2 for demonstrating cancellation | release operation 2. FIG. It is a principal part perspective view explaining cancellation | release operation 2. FIG. It is a principal part side view of the state which opened the cover part of FIG. FIG. 12 is a perspective view of FIG. 11. It is a perspective view of a bullet support body. It is a longitudinal cross-sectional view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Multi-core writing instrument 2 Shaft cylinder 21 Front shaft 21a Front end hole 22 Rear shaft 22a Window hole 22b Opening part 22c Engagement part 22d Clip 3 Ejector support body 31 Inner hole 32 Holding part 33 Partition 34 Attachment hole 4 Shaft part 41 Locking portion 42 Restricting portion 43 Inclined surface 5 Cylindrical body 6 Lid portion 61 Abutting wall portion 62 Engaging portion 63 Hinge portion 7 Writing body 71 Pen tip 72 Ink storage tube 8 Operating body 81 Operating portion 82 First release protrusion 83 Second release projection 84 Insertion portion 85 Gutter portion 86 Locking projection 9 Projectile

Claims (4)

A plurality of writing bodies are accommodated in the shaft cylinder so as to be movable in the front-rear direction, each of the writing bodies is urged rearward by a projectile, and an operating body is connected to a rear end of each of the writing bodies, A plurality of window holes extending in the front-rear direction are provided in the side wall of the cylinder in the radial direction, the respective operation bodies are protruded radially outward from the respective window holes, and one operation body is disposed along the window hole. By sliding forward, the pen tip of the cursive body connected to the one operating body is projected from the front end hole of the shaft cylinder, and the pen tip of the other cursive body that has been in the projecting state first is inserted into the shaft cylinder. A multi-core writing instrument that immerses you in,
A shaft portion extending in the axial direction is provided on the shaft center of the shaft tube,
One end of the shaft portion is fixed to the inner wall of the shaft tube, and the other end of the shaft portion is provided to be displaceable in the radial direction,
A locking part projects in the radial direction on the outer peripheral surface of the end part of the axially displaceable shaft part,
A restricting portion is projected in the radial direction on the outer peripheral surface of the shaft portion in front of the locking portion,
A cylindrical body is attached to the shaft portion between the locking portion and the regulating portion, and the cylindrical body is provided so as to be displaceable in the radial direction with respect to the shaft portion,
When the pen tip of one cursive object is in a projecting state from the front end hole, the operation body connected to the rear end of the cursive body in the pen tip projecting state is locked to the locking portion,
From this state, when the operating body connected to the rear end of the other writing body in the pen-tip immersion state is slid forward, the operating body of the other writing body that is slid forward is the locking portion. Alternatively, the operating body connected to the rear end of the writing body in the pen tip protruding state and the locking portion by contacting the cylindrical body and displacing the locking portion or the cylindrical body in the radial direction. The multi-core writing instrument characterized by releasing the latching state. Each of the operating bodies protrudes radially outward from the shaft hole of the shaft tube, a first release protrusion positioned radially inward of the operating portion, and radially inward of the operating portion And a second release protrusion located in front of the first release protrusion, and when the pen tip of one writing body is in a protruding state from the front end hole, the writing body in the protruding state of the pen tip The operating body connected to the rear end is locked to the locking portion, and the first release protrusion of the operating body connected to the rear end of the writing body in the pen tip protruding state includes the locking portion. The multi-core writing instrument according to claim 1, wherein the multi-core writing instrument is disposed between the control part and the restriction part. On the inner wall of the shaft cylinder, a projectile support that supports the projectile that urges each of the writing bodies rearward and has an inner hole through which each of the writing bodies can be inserted is fixed. A front end of the shaft portion is fixed to a rear end axial center of the projectile support body, the shaft portion is protruded rearward from the rear end of the elastic body support body, and the locking portion is provided at the rear end portion of the shaft portion. And the restricting portion is formed integrally, and the inner surface of the tubular body passes over either the outer surface of the locking portion or the outer surface of the restricting portion, so that the cylindrical body is between the locking portion and the restricting portion. The multi-core writing instrument according to claim 1 or 2, which is attached to the instrument. The writing body can be taken out from the shaft cylinder and inserted into the shaft cylinder in a state where the operating body is connected to the rear end of the writing body, and four or more writing bodies are accommodated in the shaft cylinder. Multi-core writing instrument according to 1, 2 or 3.

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