JP5221274B2 - Multi-core writing instrument - Google Patents

Description

The present invention relates to a multi-core writing instrument. Specifically, the present invention relates to a multi-core writing instrument in which a plurality of writing bodies are accommodated in a shaft cylinder, and a pen tip of each writing body is selectively projected and retracted from a front end hole of the shaft cylinder.

In Patent Document 1, for the purpose of avoiding the occurrence of scratches on the resin pusher (sliding member), the resin pusher is exposed to the outer peripheral surface from the window provided on the metal shaft, There is described a configuration that slides in the window portion and that is provided with an integrally formed internal shaft that is in close contact with the range from the inner peripheral surface to the cross section of the metal shaft.

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. It is described that it is configured to be insertable inside.
JP 2008-62578 A JP 2007-38635 A

In the multi-core writing instrument of Patent Document 1, a member that supports a spring that biases the pusher backward is constituted by a separate part from the internal shaft body. For this reason, the number of parts increases and an increase in cost cannot be avoided.

In the structure of the multi-core writing instrument of Patent Document 2, when the shaft cylinder is made of a material other than resin (for example, metal), the engaging portion of the lid portion and the detachable engaged portion are made of a material other than resin. It is difficult to form directly on the rear end of the shaft cylinder.

The present invention solves the above-mentioned conventional problems, and even if the outer surface of the shaft cylinder is made of a material other than resin, the increase in the number of parts can be suppressed, and the outer surface of the shaft cylinder is made of a material other than resin. Even if it comprises, the multi-core writing instrument which can form appropriately the engaging part of a cover part and the to-be-removable to-be-engaged part in the rear end of a shaft cylinder is provided.
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 6 are accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction, and each of the writing bodies 6 is urged rearward by a projectile body 8, An operating body 7 is attached to the rear end of each writing body 6, a plurality of window holes 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. By projecting each operation body 7 and sliding one operation body 7 forward along the window hole, the pen tip 61 of the writing body 6 attached to the one operation body 7 is moved to the front end of the shaft cylinder 2. A multi-core writing instrument that protrudes from the hole 31 and immerses the pen tip 61 of the other writing body 6 that has been in the protruding state into the shaft tube 2, wherein the shaft tube 2 is an inner shaft 4 made of resin. And an outer shaft 3 made of a material other than resin, and the inner shaft 4 has an inner hole 41 through which each of the writing bodies 6 is inserted. And a plurality of extension wall portions 42 integrally extending rearward from the support wall portion 41, and the extension walls. An inner window hole 43 extending in the front-rear direction is provided between the portions 42 in the radial direction, and the operation body 7 of the writing body 6 when the pen tip protrudes can be locked on the inner surface of the extension wall portion 42. A wall portion 45 is formed integrally, a plurality of outer window holes 32 extending in the front-rear direction are provided in the side wall of the outer shaft 3 in the radial direction, and the inner shaft 4 is accommodated in the outer shaft 3. The inner window holes 43 and the outer window holes 32 communicate with each other in the radial direction, and the operating bodies 7 protrude outside through the inner window holes 43 and the outer window holes 32. To do.

The multi-core writing instrument 1 according to the first invention has an inner shaft 4 provided with an inner hole 41a through which each writing body 6 is inserted, and a support wall portion 41 with which the front end of each of the elastic bodies 8 is brought into contact. A plurality of extension wall portions 42 integrally extending rearward from the support wall portion 41, and the operation body 7 of the writing body 6 when the pen tip protrudes can be locked to the inner surface of the extension wall portion 42. By forming the locking wall portion 45 integrally, an increase in the number of components can be suppressed even if the outer surface of the shaft tube 2 is made of a material other than resin (for example, metal).

[2] In the second invention of the present application, in the multi-core writing instrument 1 of the first invention, there are provided openable openings 33 and 44 for opening the inner window hole 43 and the outer window hole 32 rearward, A lid 5 is provided to open and close the openings 33 and 44, and the writing body 6 and the operating body 7 can be removed from the shaft cylinder 2 and inserted into the shaft cylinder 2 through the openings 33 and 44. The engagement portion 51 is provided on the front surface of the lid portion 5, and the engagement portion 51 detachably engageable with the engagement portion 51 on the front surface of the lid portion 5 is integrated with the rear end of the inner shaft 4. It is a requirement to have formed.

In the multi-core writing instrument 1 according to the second aspect of the present invention, the engagement portion 51 on the front surface of the lid portion 5 and the engagement portion 46 that can be freely engaged and disengaged are integrally formed at the rear end of the inner shaft 4 made of resin. Even if the outer surface of the shaft tube 2 is made of a material other than resin, the engaged portion 51 detachably engageable with the engaging portion 51 of the lid portion 5 can be easily formed at the rear end of the shaft tube 2.

[3] The third invention of the present application is that, in the multi-core writing instrument 1 of the first or second invention, the outer shaft 3 is made of any one of metal, wood, ceramic, ceramics, glass, and paper. And

In the multi-core writing instrument 1 of the third invention, the outer shaft 3 is made of any one of metal, wood, ceramic, ceramics, glass, and paper, so that the outer appearance and feel of the outer surface of the shaft tube 2 that cannot be obtained with resin are obtained. .

In the present invention, examples of the writing body 67 include a ballpoint pen, a marking pen, and a mechanical pencil. In the present invention, the outer shaft may be composed of a front shaft provided with a front end hole through which a pen tip of a cursive body can protrude and a rear shaft provided with an outer window hole on a side wall. As long as the rear shaft including the hole is made of at least a material other than resin, the front shaft including the front end hole may be any material of resin or a material other than resin. In the present invention, the number of writing bodies 6 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.

The multi-core writing instrument of the present invention can suppress an increase in the number of parts even if the outer surface of the shaft cylinder is made of a material other than resin (for example, metal).

1 to 7 show an embodiment of the present invention.
In the multi-core writing instrument 1 of the present embodiment, a plurality (specifically, two) of writing bodies 6 are accommodated in a shaft tube 2 so as to be movable in the front-rear direction. Each of the writing bodies 6 is urged rearward by an elastic body 8 (specifically, a compression coil spring).

(Shaft tube)
The shaft cylinder 2 includes an outer shaft 3 and an inner shaft 4 accommodated in the outer shaft 3.

(Outer shaft)
The outer shaft 3 includes a tapered cylindrical front shaft 3a and a cylindrical rear shaft 3b connected to the rear end of the front shaft 3a by screwing. The outer shaft 3 (front shaft 3a and rear shaft 3b) is made of metal (for example, stainless steel, aluminum, brass, etc.). A front end hole 31 through which the pen tip 61 of each writing body 6 can protrude is provided in the axial direction at the front end axis of the front shaft 3a. A plurality of elongated window holes 32 (specifically, two) extending in the front-rear direction are provided in the rear end side wall of the rear shaft 3b in the radial direction. At the rear end of each of the outer window holes 32, an opening 33 is formed that opens in a cutout shape behind the rear end of the rear shaft 3b. A clip 21 is provided on one of the side wall outer surfaces between the outer window holes 32 of the rear shaft 3b.

(Inner shaft)
The inner shaft 4 is made of a synthetic resin (for example, polypropylene resin, polyacetal resin, ABS resin, etc.). The inner shaft 4 includes an inner hole 41a through which each of the writing bodies 6 is inserted, and a support wall portion 41 with which the front end of each of the elastic bodies 8 is in contact, and behind the support wall portion 41. And a plurality of extension wall portions 42 extending integrally. An inner window hole 43 extending in the front-rear direction is provided between the extended wall portions 42 in the radial direction. An opening 44 is formed at the rear end of each inner window hole 43 so as to open in a cutout shape behind the rear end of the inner shaft 4.

Further, a locking wall portion 45 that can lock the operating body 7 of the writing body 6 when the pen tip protrudes is integrally formed on the inner surface of the extension wall portion 42. The locking wall portion 45 is a rib extending in the axial direction. A guide groove 22 is formed between the locking wall 45 and the inner surface of the rear shaft 3b so that the locking projections on both sides of the operating body 7 can slide.

The inner shaft 4 is fixed to the inner wall of the rear shaft 3b, and the inner shaft 4 is accommodated in the rear shaft 3b. The respective inner window holes 43 and the respective outer window holes 32 communicate with each other in the radial direction, and the respective operating bodies 7 project outside through the inner window holes 43 and the outer window holes 32.

Further, the opening 33 at the rear end of each outer window hole 32 and the opening 44 at the rear end of each inner window hole 43 are communicated in the radial direction. As a result, the writing body 6 and the operating body 7 can be removed from the shaft cylinder 2 and inserted into the shaft cylinder 2 through the openings 33 and 44.

(Cover)
At the rear end of the shaft cylinder 2 (that is, the base portion of the clip 21), a lid portion 5 that allows the opening portions 33 and 44 to be opened and closed is provided. The lid portion 5 is rotatably attached to the hinge portion 53. A contact wall 52 is formed on the front surface of the lid 5. The rear end of each operation body 7 connected to the rear end of the immersed writing body 6 is brought into contact with the contact wall portion 52.

An engagement portion 51 (specifically, an engagement hole) is provided on the front surface of the lid portion 5, and an engaged portion that can be engaged with the engagement portion 51 is provided at the rear end of the inner shaft 4. 46 (specifically, an engaging protrusion) is provided. The engaging portion 51 and the engaged portion 46 are engaged with each other when the lid portion 5 closes the openings 33 and 44, and the operating body 7 is configured by urging the elastic body 8 backward. And the abutting wall portion 52 on the front surface of the lid portion 5 are not released, and the lid portion 5 is not opened.

(Cursive)
Each of the writing bodies 67 is a ballpoint pen refill, and includes a ballpoint pen tip (that is, a pen tip 61) in which a ball is rotatably held at the front end, and an ink container having the ballpoint pen tip at the front end and having an open rear end. A tube 62. Inside the ink storage tube 62 is accommodated an ink composed of a water-based gel ink having shear thinning viscosity, a low-viscosity aqueous ink, a low-viscosity oil-based ink, or a high-viscosity oil-based ink. 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 62. 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. The ballpoint pen tip may be directly attached to the front end opening of the ink containing tube 62 by press fitting or the like, but in this embodiment, it is fixed to the front end opening of the ink containing tube 62 via the pen tip holder.

(Operation body)
An operation body 7 is attached to the rear end of each of the writing bodies 6 (that is, the rear end opening of the ink containing tube 62). Each of the operating bodies 7 is formed at the rear end portion and protrudes to the outside from the window hole of the shaft tube 2, and a first release provided at the rear end of the operation portion 71 on the opposite side in the radial direction. The projection 72, the second release projection 73 provided in front of the first release projection 72 on the opposite side of the operation portion 71 in the radial direction, and the front end portion and is fitted into the rear end opening of the ink containing tube 62 A fitting portion 74 to be formed, and a flange portion 75 formed behind the fitting portion 74. In addition, the rear end of the bullet 8 is locked to the front surface of the flange 75. Further, locking projections are formed on both side surfaces of the operating body 7. The locking projections can be engaged with the inner surfaces of both side walls of the outer window hole 32. The operation body 7 is obtained by a molded body of a synthetic resin (for example, polypropylene resin, ABS resin, polyacetal resin, etc.).

It is a longitudinal cross-sectional view of embodiment of this invention. FIG. 2 is a cross-sectional view taken along line AA, excluding the operation body in FIG. 1. It is a side view of the state which opened the opening part of FIG. It is a front view of the inner shaft of FIG. (1) is a sectional view taken along line BB in FIG. 4, (2) is a sectional view taken along line CC in FIG. 4, and (3) is a sectional view taken along line DD in FIG. It is a side view of the inner shaft of FIG. It is the EE sectional view taken on the line of FIG.

Explanation of symbols

1 Multi-core writing instrument 2 Shaft cylinder 21 Clip 22 Guide groove 3 Outer shaft 31 Front end hole 32 Outer window hole (window hole)
33 Opening portion 3a Front shaft 3b Rear shaft 4 Inner shaft 41 Support wall portion 41a Inner hole 42 Extension wall portion 43 Inner window hole 44 Opening portion 45 Locking wall portion 46 Engagement portion 5 Lid portion 51 Engagement portion 52 Contact Wall part 53 Hinge part 6 Writing body 61 Pen tip 62 Ink storage tube 7 Operation body 71 Operation part 72 First release protrusion 73 Second release protrusion 74 Insertion part 75 Eave part 8 Elastic body

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 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 it forward, the pen tip of the cursive body attached to one of the operating bodies 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 first is inserted into the shaft cylinder. A multi-core writing instrument that immerses you in,
The shaft cylinder includes an inner shaft made of resin and an outer shaft made of a material other than resin, the inner shaft has an inner hole through which each of the writing bodies is inserted, and each of the elastic bodies An inner window hole extending in the front-rear direction between the extension wall portions is formed by a support wall portion with which the front end is in contact and a plurality of extension wall portions integrally extending rearward from the support wall portion. A plurality of locking wall portions integrally formed on the inner surface of the extension wall portion and capable of locking the operation body of the writing body when the pen tip protrudes, and extending in the front-rear direction on the side wall of the outer shaft. The inner window is accommodated in the outer shaft, the inner window holes and the outer window holes are communicated in the radial direction, and each operation is performed. A multi-core writing instrument, wherein a body is projected outside through the inner window hole and the outer window hole. An openable and closable opening that opens the inner window hole and the outer window hole to the rear is provided, a lid that allows the opening to be opened and closed is provided, and the writing body and the operation body are connected to the shaft cylinder through the opening. It is configured to be removable from the inside and insertable into the shaft cylinder, and an engaging portion is provided on the front surface of the lid portion, and a rear end of the inner shaft is detachable from the engaging portion on the front surface of the lid portion. The multi-core writing instrument according to claim 1, wherein the engaging portions are integrally formed. The multi-core writing instrument according to claim 1 or 2, wherein the outer shaft is made of metal, wood, ceramic, ceramics, glass, or paper.

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