JP2002370494A - Writing utensil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a writing utensil which is entirely compact by improving the relationship between an operating member and a knocking mechanism and comprises parts capable of being simplily assembled a barrel. SOLUTION: The writing utensil is capable of switching the writing part 21 of a refill 2 from a state of projection from an apex orifice 16 to a state of retraction into the apex orifice or vice versa and retaining the switched state by the activation of a knocking mechanism through operating a slide member 3. In this writing utensil, the slide member 3 is assembled into a first barrel member 11 in such a way that a neck part between the manipulation piece part 31 and the push-out short barrel part 33 of the slide member 3 intervenes into the guide groove 14, with the help of a barrel 1 consisting of the first barrel member 11 in which the guide groove 14 is cut in the axial direction from a base end opening and a second barrel member 13, connected to each other. In addition, the knocking mechanism 4 constituted of a sliding annular body 41 with a cam groove 42 formed at the tip and a cylindrical stopper 43 which is rotated by pushing a cam part 44 by the cam groove 42, is built forward of the push-out short cylinder part 33.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a knocking mechanism which is operated by operating a slide member provided outside a barrel so that a refill inserted into the barrel moves forward and backward. The present invention relates to a writing implement configured to be held in two modes: a writable state protruding from a distal end opening of a barrel, and a stored state in which a writing unit is immersed in the barrel.

[0002]

2. Description of the Related Art A slide member having an operating piece along the outer surface of a shaft cylinder is inserted into a shaft cylinder into which a refill constantly urged rearward by a spring is inserted, and a cam groove for moving forward by operation of the slide member. And a knock mechanism having a cylindrical stopper that rotates by pressing the cam portion by the operation of the knock mechanism by operating the slide member, whereby the writing portion at the tip of the refill projects from the front end of the barrel. A writing instrument that is switched between two modes, a writable state and a stored state immersed in the shaft cylinder, is disclosed in Japanese Patent Application Laid-Open No. 58-8699, Japanese Patent Application Laid-Open No. Hei 4-212000, or 6
Japanese Patent Laid-Open Nos. 4-22490 and 3-119663 have already proposed, but in the conventional one, the relationship between the slide member and the knock mechanism is complicated, so that the entire structure cannot be reduced in size, and the refill is reduced. In some cases, it is difficult to smoothly operate the slide member so that the slide member can be moved in and out, and there are many problems in manufacturing such that it takes time and effort to assemble parts such as the slide member to the barrel.

[0003]

The object of the present invention is to solve the above-mentioned conventional problems and to improve the relationship between the operating member and the knock mechanism so that the whole can be made compact. Another object of the present invention is to provide a writing instrument that can easily assemble each part in a barrel.

[0004]

Means for Solving the Problems A writing instrument according to the present invention which has been made to solve the above-mentioned problem, comprises a shaft cylinder into which a refill constantly urged rearward by a spring is inserted.
Incorporating a slide member having an operation piece along the outer surface of the shaft cylinder, and a knock mechanism having a cylindrical stopper that is rotated by a cam groove pushed by a cam groove that is advanced by operation of the slide member, A writing instrument configured to switch and hold the refill by switching a slide member between two modes: a writable state in which a writing part at the tip of the tip protrudes from the front end of the barrel, and a stored state immersed in the barrel. A first barrel member in which a guide groove of a required length is cut in an axial direction from an opening end of a connecting small diameter portion formed at a base end, and a distal end opening is fitted to the connecting thin tube portion. On the other hand, the slide member is formed by connecting an operation piece portion along the outer surface of the shaft tube with a short extruded tube portion via a neck portion. The neck is interposed in the guide groove and the extruded short cylinder Is inserted into the first barrel member so that the second barrel member is inserted from the base end opening of the connecting thin tube portion, and the second barrel member is opened at the distal end of the connecting thin tube portion of the first barrel member. The cam groove, which is advanced by the operation of the slide member, is provided at the distal end of the slide ring body separated from the slide member. The knock mechanism is configured to be interposed between the slide stopper and the cylindrical stopper so as to be in contact with the distal end surface of the short extruded cylindrical portion of the slide member.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to a capless ballpoint pen with a name mark shown in the drawing. Reference numeral 1 denotes a barrel, and 2 denotes a refill inserted into the barrel 1. The aforementioned barrel 1 has a first barrel member 11 made of a transparent hard synthetic resin material having a base end serving as a connecting narrow portion 12, and a connecting narrow portion 12 of the first barrel member 11. And a second barrel member 13 made of the same material and connected to the front end opening. A guide groove 14 having a required length is cut into the first shaft cylinder member 11 in the axial direction from an opening end of the connecting small-diameter portion 12 which is a base end opening.
A tip cap 1 having a front end 16 at which a writing portion 22 at the tip of the above-mentioned refill 2 protrudes and protrudes at the tip of the barrel member 11.
5 is detachably screwed, and a clip 17 is provided on the second shaft cylinder member 13.

Reference numeral 3 denotes a slide member which is inserted into the barrel 1 with the operation piece 31 extending along the outer surface of the barrel 1, and the slide member 3 is an operation piece which extends along the outer surface of the barrel 1. 31
The slide member 3 has the neck 32 interposed in the guide groove 14 through the base opening of the connecting small-diameter portion 12 to integrally form the extrusion short cylindrical portion 33 with the neck 32 interposed therebetween. After the cylindrical portion 33 is inserted into the first cylindrical member 11, the distal end opening of the second cylindrical member 13 is fitted into the connecting small-diameter portion 12, and the two shafts are fixed by a fixing means such as ultrasonic welding. The tube members are connected and integrated.

Reference numeral 4 denotes a knock mechanism which is incorporated in the barrel 1 into which the refill 2 is inserted so as to be constantly urged rearward by the spring 5 and which is operated by operating the slide member 3. The knock mechanism 4 includes a sliding ring 41 separate from the slide member 3 having a cam groove 42 formed at a tip thereof,
It comprises a cylindrical stopper 43 provided with a cam portion 44 corresponding to the cam groove 42 of the sliding ring member 41, and is formed on the inner surface of the intermediate portion of the first shaft cylinder member 11 on the peripheral surface. A plurality of protrusions 46 that can intervene are provided between the ridges 45, 45. The base of the slide ring 41 is separated from the slide member 3 while the slide ring 41 is separated from the slide member 3.
The knock mechanism 4 is interposed between the cylindrical stopper 43 and the extruded short cylindrical portion 33 so as to be in contact with the tip of the short cylindrical portion 33. Then, the above-mentioned refill 2 has its base end reaching the middle of the second shaft cylinder member 13 in the cylindrical stopper 43, the sliding ring 41, and each of the cylinder holes of the extrusion short cylinder section 33 of the slide member 3. It is assumed to have been inserted.

Reference numeral 6 denotes a stopper made of an elastic synthetic resin material such as PBT resin, which is removably fitted into the base end opening of the second barrel member 13. The bottom of the stopper 6 has a second shaft. A plurality of ventilation holes 61 communicating with the inside of the cylindrical member 13 are provided, and the stopper 6 is provided with a name mark 7 containing an ink adjusting plate 72 and a porous stamping material 71 and fixed by a retainer 73. The printing surface of the name mark 7 is covered with a cap 8 which can be detachably attached to the stopper 6. In the drawing, reference numeral 9 denotes the retraction of the spring 5 and the cylindrical stopper 4
3 is a stopper formed by crushing a forward portion of the refill 2 to restrict the advance of the refill 3.

In such a construction, the refill 2 is normally in a retracted state in which the writing portion 21 at the tip thereof is immersed in the barrel 1 by the urging force of the sling 5, but when the writing is to be performed, When the operation piece 31 along the outer surface of the cylinder 1 is pushed forward, the slide member 3 moves forward, and the cam groove 42 constituting the knock mechanism 4 pushes the cam 44 of the cylindrical stopper 43 to push the cylinder stopper. 43, whereby the cam portion 44 of the cylindrical stopper 43 is
The refill 2 is held in a writable state in which the writing portion 21 at the tip of the ridge portion 45 protrudes from the front end 16 of the barrel 1 at the tip of a ridge 45 provided on the inner surface of the barrel 1. When the one part 31 is pushed forward, the cylindrical stopper 43 is rotated by the same action as described above, whereby the contact of the cam part 44 of the cylindrical stopper 43 with the tip of the ridge part 45 is released. By the urging force of 5, the refill 2 returns to the stored state in which the writing portion 21 at the tip is immersed in the barrel 1, and the relationship between the knock mechanism 4 and the refill 2 is the same as that of a conventional writing instrument of this type. The relationship between knock mechanism 4 and refill 2 hardly changes.

However, in the present invention, the barrel 1
The first shaft cylinder member 11 in which a guide groove 14 of a required length is cut in the axial direction from the opening end of the connecting small-diameter portion 12 formed at the base end, and the distal end opening is formed in the connecting small-diameter portion 12. On the other hand, the sliding member 3 is connected to the operating piece 31 along the outer surface of the barrel 1 via the neck 32 and the extruded short barrel 33 is connected to the sliding member 3. As a result, the neck 32 of the slide member 3 is
So that the short extruded cylindrical portion 33 is inserted into the connecting small-diameter portion 12 from the base end opening thereof.
And the connecting small-diameter portion 12 of the first barrel member 11
Before the first barrel member 11 and the second barrel member 13 are connected to each other to form the barrel 1, the connecting small diameter is formed. The slide member 3 can be incorporated into the first shaft cylinder member 11 by using the guide groove 14 cut in the axial direction from the opening end of the portion 12, and the assembling work of the slide member 3 can be performed accurately and easily. Then, the operation of the operation piece 31 causes the neck 32 to
The slide member 3 which is interposed in the slide member is smoothly slid, so that the operation of the slide member 3 becomes easy.

Further, the cam groove 42 for operating the cylindrical stopper 43 is not provided on the slide member 3, but is provided on the distal end of the slide ring 41 separate from the slide member 3. The knock mechanism 4 is constituted by interposing the sliding ring 41 between the cylindrical stopper 43 so that the base end thereof is in contact with the distal end of the extruded short cylindrical portion 33 of the sliding member 3. And the length of the sliding ring body 41 can be shortened, so that the whole can be made compact.
Slide ring 41 separated and independent from slide member 3 through
Is smoothly advanced using the cylindrical hole surface of the first shaft cylindrical member 11 as a guide, so that even if there is a problem with the accuracy of the parts, the cam groove 44 is accurately knocked by the cam groove 42 and applied to the operation piece 31. The forward force is transmitted to the cylindrical stopper 43 as it is, so that the switching operation for switching the refill 2 from the writable state to the stored state or from the stored state to the writable state can be performed very accurately and easily.

[0012]

As described above, the present invention solves the conventional problems, improves the relationship between the slide member and the knock mechanism, makes it possible to make the whole compact, and makes each part a barrel cylinder. It can be easily assembled inside, and even if the dimensional accuracy of each part is not high, the operation of the knock mechanism by operating the slide member is accurate, and the refill can be written from the writable state to the stored state or can be written from the stored state There is an advantage that the switching operation for changing the state can be performed extremely smoothly. Therefore, the present invention has solved the problems of the conventional writing instrument of this type, and has a very large advantage that contributes to the industry in addition to the advantages that the structure is simple and can be provided at low cost.

[Brief description of the drawings]

FIG. 1 is a partially cutaway front view showing a preferred embodiment of the present invention.

FIG. 2 is a plan view showing a preferred embodiment of the present invention.

FIG. 3 is a partially cutaway front view of a first barrel member according to a preferred embodiment of the present invention.

FIG. 4 is a vertical sectional front view of a slide member according to a preferred embodiment of the present invention.

FIG. 5 is a partially cutaway front view of a sliding ring according to a preferred embodiment of the present invention.

FIG. 6 is a front view of a cylindrical stopper according to a preferred embodiment of the present invention.

[Explanation of symbols]

 1 Shaft Barrel 11 First Shaft Barrel Member 12 Thin Portion for Connection 13 Second Shaft Barrel Portion 14 Guide Groove 15 Tip Cap 16 Tip Port 2 Refill 21 Writing Unit 3 Slide Member 31 Operating Piece 32 Neck 33 Extruded Short Tube Part 4 Knock mechanism 41 Sliding ring 42 Cam groove 43 Cylindrical stopper 44 Cam part 5 Spring 6 Receptacle 7 Name mark 71 Porous stamping material 8 Cap

Claims (3)

[Claims] 1. A shaft cylinder (1) into which a refill (2) constantly urged rearward by a spring (5) is inserted.
Slide member (3) with operating piece (31) along the outer surface of (1)
And a knock mechanism (4) provided with a cylindrical stopper (43) that is rotated by the cam portion (44) being pushed by the cam groove (42) advanced by the operation of the slide member (3). Slide member
By operating the knock mechanism (4) by the operation of (3), the writable state in which the writing portion (21) at the tip of the refill (2) projects from the front end (16) of the barrel (1), (1) In a writing instrument adapted to be switched and held in two modes of a housed state immersed in the above, the above-mentioned shaft cylinder (1) is moved from an opening end of a connecting small diameter portion (12) formed at a base end. Guide groove of required length in the axial direction (14)
And the connecting small diameter portion (1).
The slide member (3) is attached to the operation piece (31) along the outer surface of the barrel (1), while the second barrel member (13) is fitted with the tip opening at (2). Extruded short tube through neck (32)
(33), the slide member (3) is inserted into the guide groove (14) by the neck (32) of the extrusion member (33).
Is inserted into the first barrel member (11) so as to be inserted from the base end opening of the connecting small diameter portion (12), and the connecting small diameter portion of the first barrel member (11) is connected. A second shaft cylinder member (13) is fitted and integrated with (12) with its leading end opening, and a cam groove (42) advanced by operating the slide member (3) is provided with the slide member (3). The slide ring (41) is provided at the distal end of the separated slide ring (41), and the base end of the slide ring (41) is applied to the distal end of the extruded short cylindrical portion (33) of the slide member (3). A writing implement characterized by comprising a knock mechanism (4) interposed between the tubular stopper (43) so as to be in contact therewith. The leading end (16) of the barrel (1) is connected to the first barrel member (1).
2. The writing implement according to claim 1, wherein the writing implement is provided on a tip cap (15) detachably screwed to the tip of (1). 3. The second barrel member (13) has an opening at a base end thereof and a stopper (6) with a cap (8) fitted therein. 3. The writing implement according to claim 1, wherein a porous stamping material (71) is accommodated in the name mark (7).