JP2010094906A - Multilead writing implement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide as multilead writing implement capable of preventing an opening part from being opened carelessly at the time other than replacement of a writing body, capable of opening and closing quickly and easily the opening part, and capable of preventing a lid part from being lost. <P>SOLUTION: The openable and closable opening part 23 is provided to open each window hole 22 rearwards, in a rear end of a shaft tube 2, and the writing body 3 and an operation body 4 are constituted to be removable from the shaft tube 2 and to be insertable into the shaft tube 2, under a connected state thereof via the opening part 23. The lid part 6 is provided to open and close the opening part 23, in the rear end of the shaft tube 2. The lid part 6 is provided penetratedly shaft directionally, and is provided with an insertion through groove 63 opened radial-directional-outwards. The lid part 6 is attached rotatably around an axis of the shaft tube 2 as the center. The opening part 23 is opened by communicating a through-hole with the window hole 22, and the opening part 23 is closed by bringing the through-hole into a noncommunicated state with the window hole 22. <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 slides an operating body protruding from a window hole on a side wall of a shaft cylinder forward so that a pen tip of a writing body accommodated in the shaft cylinder protrudes and retracts from a front end hole of the shaft cylinder.

In Patent Document 1, an openable / closable opening that opens a window hole to the rear is provided at the rear end of the shaft cylinder, and the writing body and the operation body can be removed from the shaft cylinder through the opening, and the shaft cylinder. There is disclosed a multi-core writing instrument that is configured to be insertable therein and is provided with a lid at the rear end portion of the shaft cylinder that allows the opening to be opened and closed. Further, in Patent Document 1, the lid portion is provided so as to be rotatable in a substantially front-rear direction by a hinge portion, an engaging portion is provided on the front surface of the lid portion, and the lid portion is engaged at the rear end of the shaft cylinder. The structure which provided the to-be-engaged part which can be engaged with a joint part is disclosed.

In Patent Document 2, an openable and closable opening that opens a window hole to the rear is provided at the rear end of the shaft tube, and the writing body and the operation body can be removed from the shaft tube through the opening and the shaft tube. The lid is configured to be insertable into the rear end of the shaft cylinder, and a lid that allows the opening to be opened and closed is provided. A multi-core writing instrument provided with two engaged parts that can be engaged with the engaging part is disclosed. Patent Document 2 discloses that the engaging portion of the lid portion and the engaged portion of the shaft tube are engaged and disengaged by rotating the lid portion in the circumferential direction. Yes.

In Patent Document 3, an openable and closable opening that opens a window hole to the rear is provided at the rear end of the shaft cylinder, and the writing body and the operating body can be removed from the shaft cylinder through the opening and the shaft cylinder. A multi-core writing instrument is disclosed which is configured to be insertable into the inner cylinder and is detachably screwed to the rear end portion of the shaft cylinder so that the opening can be opened and closed.

JP 2007-38635 A JP 2007-15275 A JP 2007-15274 A

In the multi-core writing instrument of Patent Document 1, the engagement between the engagement portion and the engaged portion may be loosened due to repeated engagement and disengagement (that is, repeated opening and closing of the opening). By simply touching the operating body of the pen-immersed writing body against the lid, the engagement between the engaging portion and the engaged portion can be easily released and the lid can be rotated rearward. There is a possibility that the opening may be opened carelessly except during the replacement.

In the multi-core writing instrument of Patent Document 2, when the opening at the rear end of the shaft tube is opened, the cover is separated from the shaft tube, and thus the cover is easily lost. In the multi-core writing instrument of Patent Document 2, since the lid and the shaft tube are engaged at the two engaging portions and the engaged portion, the engagement operation between the lid and the shaft tube is not easy. Absent.

The multi-core writing instrument of Patent Document 3 cannot quickly attach / detach the lid (that is, open / close the opening). In addition, the multi-core writing instrument of Patent Document 3 is similar to the multi-core writing instrument of Patent Document 2, because the lid part is separated from the axial cylinder when the opening at the rear end of the axial cylinder is opened. Is easy to lose.

The present invention solves the above-described conventional problems, and the opening does not open carelessly except when the cursive body is replaced, and the opening can be opened and closed quickly and easily. In addition, the present invention intends to provide a multi-core writing instrument in which the lid portion is not lost. 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 3 are accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction, and each of the writing bodies 3 is urged rearward by a resilient body 5; An operating body 4 is attached to the rear end of each writing body 3, a plurality of window holes 22 extending in the axial direction are provided in the side wall of the shaft cylinder 2 in the radial direction, and radially outward from the respective window holes 22. Each operating body 4 is protruded to the front, and one operating body 4 is slid forward along the window hole 22 so that the pen tip 31 of the writing body 3 to which the one operating body 4 is attached is connected to the shaft cylinder. 2 is projected from the front end hole 21 and the pen tip 31 of the other writing body 3 that has been in the projecting state is immersed in the shaft tube 2, and each window is formed at the rear end of the shaft tube 2. An openable / closable opening 23 for opening the hole 22 rearward is provided, and the writing body 3 and the operating body 4 are connected via the opening 23 A multi-core writing instrument that is configured to be removable from the shaft tube 2 and insertable into the shaft tube 2 and provided with a lid 6 at the rear end of the shaft tube 2 that allows the opening 23 to be opened and closed. The lid portion 6 includes an insertion groove 63 that penetrates in the axial direction and opens radially outward, and the lid portion 6 is attached to be rotatable about the axis of the shaft cylinder 2. The opening 23 is opened by communicating the insertion hole and the window hole 22, while the opening 23 is closed by bringing the insertion hole and the window hole 22 out of communication. It is a requirement that

The multi-core writing instrument 1 according to the first aspect of the invention has a structure in which the lid 6 is not opened and closed in the front-rear direction, but in a structure in which the lid 6 is opened and closed in the circumferential direction. Therefore, the opening 23 is repeatedly opened and closed. However, the opening 23 does not open carelessly except when the cursive 3 is replaced. Further, the multi-core writing instrument 1 according to the first aspect of the invention can open and close the opening 23 by a slight rotation operation (that is, a rotation operation within one rotation) of the lid portion 6 around the axis of the shaft cylinder 2. The opening 23 can be opened and closed quickly and easily. In the multi-core writing instrument 1 according to the first aspect of the present invention, since the lid 6 is not separated even when the opening 23 is opened, the lid 6 is not lost.

[2] According to a second invention of the present application, in the multi-core writing instrument 1 of the first invention, a cylindrical portion 62 is formed on the front surface of the lid portion 6, and an annular engagement is formed on the inner surface of the cylindrical portion 62. On the other hand, an annular engaged portion 24 is formed on the outer peripheral surface of the rear end portion of the shaft tube 2, and the engaging portion 64 of the lid portion 6 and the engaged portion 24 of the shaft tube 2 are formed. It is a requirement to engage with each other to prevent rotation.

In the multi-core writing instrument 1 according to the second aspect of the present invention, the lid portion 6 is rotatably engaged with the rear end portion of the shaft tube 2 so that the lid portion 6 can rotate the shaft center of the shaft tube 2. Fixed as a center for rotation. Examples of the annular engagement portion 64 and the annular engaged portion 24 include an annular protrusion and an annular groove.

 [3] The third invention of the present application requires that, in the first or second multi-core writing instrument 1, an anti-slip portion 66 is provided on the outer peripheral surface of the lid portion 6.

The multi-core writing instrument 1 according to the third aspect of the present invention is provided with the anti-slip portion 66 on the outer peripheral surface of the lid portion 6, so that when the outer peripheral surface of the lid portion 6 is picked up with a finger and rotated, The lid 6 can be easily rotated. In addition, as for the said anti-slip | skid part 66, protrusion, an unevenness | corrugation, etc. are mentioned, for example.

The multi-core writing instrument of the present invention does not open the opening carelessly except at the time of exchanging the cursive body, can open and close the opening quickly and easily, and the lid is lost. There is nothing.

1 to 4 show an embodiment of the present invention.
In the multi-core writing instrument 1 of the present embodiment, a plurality (two in this case) of the writing bodies 3 are accommodated in the shaft cylinder 2, and the pen tip 31 of each writing body 3 is the front end of the front end of the shaft cylinder 2. It is selectively (alternatively) infested from the hole 21. An operation body 4 is attached to the rear end of each of the writing bodies 3. Each of the writing bodies 3 is always urged rearward by an elastic body 5 (coil spring). Examples of the writing body 3 include a ballpoint pen, a marking pen, and a mechanical pencil.

The shaft cylinder 2 includes a cylindrical front shaft 2a and a cylindrical rear shaft 2b that is detachably screwed to the front shaft 2a. The front shaft 2a and the rear shaft 2b are made of a synthetic resin or a metal material.

A front end portion of the front shaft 2a is formed in a tapered shape, and a front end hole 21 is provided through the front end of the front shaft 2a in the axial direction. A male thread portion is formed on the outer peripheral surface of the rear end portion of the front shaft 2a.

A female thread portion is formed on the inner peripheral surface of the front end portion of the rear shaft 2b. The male screw portion of the front shaft 2a is screwed into the female screw portion. A clip 25 is provided on the outer surface of the rear end of the rear shaft 2b.

A plurality of window holes 22 extending in the axial direction are formed in the rear end side wall of the rear shaft 2b. The operation part 41 of each cursive body 3 protrudes from the respective window holes 22 to the outside. By sliding the operation portions 41 forward along the window holes 22, the pen tips 31 of the writing bodies 3 are selectively protruded forward from the front end holes 21. A locking wall portion (not shown) is integrally formed on the inner surface of the side wall between the window holes 22 of the rear shaft 2b. The rear end of the operating body 4 attached to the rear end of the writing body 3 in the pen tip protruding state is locked to the locking wall portion.

An opening 23 is formed at the rear end of the rear shaft 2b. A lid that allows the opening 23 to be opened and closed is attached to the rear end of the rear shaft 2b. The writing body 3 provided with the operating body 4 can be inserted into the shaft tube 2 and removed from the shaft tube 2 (replaceable) through the opening 23.

The lid portion 6 includes a disk-shaped main body 61 and a cylindrical portion 62 formed integrally with the front surface of the main body 61. The main body 61 of the lid portion 6 is formed with a notch-like insertion groove 63 that opens outward in the radial direction and penetrates in the axial direction at only one location. Thereby, only the writing body 3 and the operation body 4 which need replacement | exchange can be replaced | exchanged through the opening part 23, and the writing body 3 and the operation body 4 which do not need replacement | exchange are not taken out accidentally. The insertion groove 63 may be provided at a plurality of locations on the lid (for example, the same number of locations as the number of the writing bodies 3 accommodated in the shaft tube 2).

An annular engagement portion 64 (specifically, an annular protrusion) is integrally formed on the inner surface of the cylindrical portion 62 of the lid portion 6. An annular engaged portion 24 (specifically, an annular groove) is formed on the outer peripheral surface of the rear end portion of the rear shaft 2b. The annular protrusion of the lid portion 6 and the annular groove of the rear shaft 2b are rotatably engaged with each other, whereby the lid portion 6 is an outer periphery of the rear end portion of the shaft cylinder 2 (rear end portion of the rear shaft 2b). The lid 6 is fixed to the surface of the shaft cylinder 2 so as to be rotatable about the shaft center.

The front surface of the lid portion 6 (the front end of the cylindrical portion 62 of the lid portion 6) serves as an abutting wall portion 65 with which the rear end of the operating body 4 attached to the pen-immersed writing body 3 can abut. .

An anti-slip portion 66 (for example, irregularities) is formed on the outer peripheral surface of the lid portion 6.

In FIG. 3, the state which closed the opening part 23 of this Embodiment is shown.
The lid portion 6 is rotated with respect to the shaft cylinder 2, and the insertion hole of the lid portion 6 and all the window holes 22 are brought into a non-communication state, whereby all the opening portions 23 are closed.

In FIG. 4, the state which opened the opening part 23 of this Embodiment is shown.
The lid 6 is rotated with respect to the shaft cylinder 2, and the insertion groove 63 of the lid 6 and one window hole 22 (that is, the window hole 22 from which the operating body 4 at the rear end of the writing body 3 requiring replacement protrudes). Communication is thereby established, and one opening 23 is opened. The writing body 3 and the operating body 4 can be removed from the shaft tube 2 and inserted into the shaft tube 2 in a connected state through the opening 23 in the open state.

Further, in the present invention, a locking portion (for example, a plurality of locking protrusions or locking holes) capable of temporarily stopping the rotation of the lid portion 6 at a certain angle is provided between the lid portion 6 and the rear end portion of the shaft tube 2. It can also be formed between.

It is a longitudinal cross-sectional view which shows the closed state of the opening part of embodiment of this invention. It is a side view of the opening state of the opening part of the multi-core writing instrument of FIG. It is a top view which shows the closed state of the opening part of the multi-core writing instrument of FIG. It is a top view which shows the opening state of the opening part of the multi-core writing instrument of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Multi-core writing instrument 2 Shaft cylinder 2a Front shaft 2b Rear shaft 21 Front end hole 22 Window hole 23 Opening part 24 Engagement part 25 Clip 3 Writing body 31 Pen tip 4 Operation body 41 Operation part 5 Elastic body 6 Cover part 61 Main body 62 Cylindrical part 63 Insertion groove 64 Engagement part 65 Contact wall part 66 Anti-slip part

Claims (3)

A plurality of writing bodies are accommodated in a 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 attached to a rear end of each of the writing bodies, A plurality of window holes extending in the axial 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 with the one operating body attached is projected from the front end hole of the shaft cylinder, and the pen tip of the other cursive body that was in the projecting state is moved into the shaft cylinder. An openable and closable opening is provided at the rear end of the shaft cylinder to open each window hole rearward, and the writing body and the operating body are connected to each other through the opening in the shaft cylinder. It can be removed from the shaft and can be inserted into the shaft cylinder, and the opening is opened and closed at the rear end of the shaft cylinder. A multi-core writing instrument provided with a lid to standing,
The lid portion includes an insertion groove that penetrates in the axial direction and opens radially outward, and the lid portion is attached to be rotatable about an axis of the shaft cylinder, and the insertion hole and the window A multi-core writing instrument, wherein the opening is opened by communicating with a hole, and the opening is closed by disabling the insertion hole and the window hole. A cylindrical portion is formed on the front surface of the lid portion, an annular engaging portion is formed on the inner surface of the cylindrical portion, and an annular engaged portion is formed on the outer peripheral surface of the rear end portion of the shaft tube. The multi-core writing instrument according to claim 1, wherein the engaging portion of the lid portion and the engaged portion of the shaft tube are rotatably engaged with each other. The multi-core writing instrument according to claim 1 or 2, wherein a non-slip portion is provided on an outer peripheral surface of the lid portion.

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