JP2005125497A - Knock type writing instrument - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a knock type writing instrument which can give a user light knock feeling by reducing a sliding resistance at a knock time and to provide the knock type writing instrument which prevents a value in appearance by a scratch damage from being deteriorated even if a member made of a metal is used for a part of a refill when the barrel is transparent or translucent. <P>SOLUTION: The knock type writing instrument includes a protruding part 10b formed along a longitudinal direction of the barrel 10 on the inner peripheral surface of the barrel 10. When the inner refill is moved longitudinally by using a knock mechanism, the member of the metal of the refill slides on the front surface of this protruding part 10b. Since the one of the sliding members is made of the metal, as compared with the barrel and the refill made of resin, the sliding resistance can be reduced. Moreover, since the member of the metal is slid on this protruding part 10b by forming the inward protruded protruding part 10b formed on the inner wall of the barrel, as merely compared with the barrel of a cylindrical shape, an area that the member of the metal slides can be reduced. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a knock-type writing instrument in which a writing tip appears and disappears from the tip of a shaft tube.

  As a writing instrument in which a writing tip appears and disappears from the tip of a shaft cylinder, for example, there is Patent Document 1 below.

JP 2003-63192 A

In this patent document 1, the refill which slides in the front-back direction is accommodated in the inside of a shaft cylinder. In general, in the case of low-priced products, the shaft tube and refill are made of resin due to the reason that the cost can be reduced, the complicated shape can be formed, the internal ink can be seen through, etc. It is often formed by.
When the refill is moved back and forth and the writing tip is projected and retracted from the tip of the shaft tube, the inner surface of the shaft tube and the outer surface of the refill slide. If the sliding resistance of the sliding portion is large, there is a case where the user feels a heavy knock when trying to move the refill back and forth. In particular, when the shaft tube and the refill are made of resin, the sliding resistance tends to increase.

When the shaft tube and the refill are made of resin, even if the internal refill slides in the front-rear direction, there is almost no possibility of scratching the sliding surface. On the other hand, when a metal member is provided on a part of the refill, it is possible to improve the appearance, to give a high-class feeling, and to give rigidity, but a part of the refill If a metal member is used, the shaft tube may be scratched by sliding between the metal member and the shaft tube. In particular, if the shaft tube is transparent or translucent, this scratch can be recognized from the outside. There is a risk of lowering.

Therefore, an object of the present invention is to provide a knock type writing instrument that can reduce sliding resistance at the time of knocking and give a light knock feeling to a user.
Another object of the present invention is to provide a knock-type writing instrument that prevents a decrease in appearance value due to scratching even if a metal member is used as a part of the refill when the shaft tube is transparent or translucent. It is.

  A first means for solving the problems includes a shaft tube, a writing chip housed in the shaft tube, an ink storage tube having the writing chip fixed to a tip thereof, and ink stored in the ink storage tube. And a knock mechanism that moves the refill back and forth and causes the writing tip to protrude and retract from the tip of the shaft tube. At least a part of the outer surface of the ink containing tube includes a writing tip other than the writing tip. The metal member is provided with a protruding portion protruding inwardly on the inner peripheral surface of the shaft cylinder, and the metal member slides on the protruding portion when the writing tip protrudes from the shaft cylinder. It is characterized by doing so.

The writing tip is not limited to a ballpoint nib in which a ball is housed at the tip as in the embodiments described later, but also includes a fibrous nib formed of fibers used for a sign pen or the like.
The knock mechanism portion is not particularly limited as long as the writing tip protrudes and is housed from the tip of the shaft tube. For example, there is a mechanism using a rotor.
When the writing tip appears and disappears repeatedly, the metal member provided on the refill and the inner peripheral surface of the shaft tube slide. Thus, since one side of the sliding part is made of a metal member, the sliding resistance is reduced and a light knock feeling can be imparted as compared with the case where the conventional resin and the resin slide.

In addition to the means described above, at least the vicinity of the shaft tube where the protruding portion is formed may be made transparent or semi-transparent so that the inside of the shaft tube can be visually confirmed.
When the knocking operation is repeated on the shaft cylinder in which the refill provided with the metal member is stored, there is a high possibility that a scratch is formed on the inner peripheral surface of the shaft cylinder by the metal member. If no measures are taken and the shaft tube is transparent or translucent, scratches may be randomly formed on the inner peripheral surface of the shaft tube, reducing the appearance and making it impossible to see through the shaft tube due to scratches. There is also sex.
Therefore, even if the shaft tube is transparent or semi-transparent, as in the first means, a protrusion is formed on the inner peripheral surface of the shaft tube, and a metal member is slid on the protrusion, Even if formed, the scratches can occur in advance on the projected portions, and scratches do not randomly occur in unintended locations, thereby preventing the appearance from being deteriorated due to the scratches.

In addition to the above means, a non-sliding portion that is formed between the projecting portions and that does not slide the metal member may be formed to face each other.
By forming a non-sliding part that does not cause scratches, it is possible to see the inside of the shaft cylinder, and when the non-sliding part is placed facing it, the inside is seen through from one non-sliding part In addition, since light rays enter from the opposed non-sliding portions, the internal see-through state is improved.

INDUSTRIAL APPLICABILITY According to the present invention, it is possible to provide a knock type writing instrument that can reduce sliding resistance at the time of knocking and give a light knock feeling to a user.
Further, when the shaft tube is transparent or semi-transparent, it is possible to provide a knock type writing instrument that prevents a decrease in appearance value even if a metal member is used as a part of the refill.

Hereinafter, embodiments of the present invention will be described with reference to FIGS. In the present specification, “front” refers to the direction of the writing chip 31, and “rear” refers to the direction in which the knock mechanism 90 is provided.
FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, in which a refill 30 is housed in a shaft cylinder 10 provided with a knock mechanism portion 90.
The refill 30 contains pressurized gas and ink inside, an exterior member 32 containing ink and pressurized gas behind, a metal member 32b provided in front of the exterior member 32, a refill It consists of a writing chip 31 provided at the front end of 30 and a chip holder 35 covering the writing chip 31. The writing chip 31 is a so-called ballpoint pen nib in which a writing ball is stored at the tip.

A coil spring 40 is provided between the front of the shaft cylinder 10 and the metal member 32 b, and the refill 30 is biased to the rear of the shaft cylinder 10. Although details will be described later, the knock mechanism unit 90 uses a so-called known mechanism, and includes a rotor 60, a knock member 50 that moves the rotor 60 forward and backward, and a rear end of the shaft cylinder 10. The inner cylinder 70 is screwed and fixed and has a cam groove formed on the inner wall. By repeatedly pressing the knock member 50, the writing tip 31 appears and disappears from the tip of the shaft cylinder 10.

  The refill 30 will be described in more detail with reference to FIG. 2. The refill 30 includes a tube body 34 in which ink is stored, a storage cylinder 33 in which the tube body 34 is built, a writing chip 31 and a storage cylinder 33. A joining member 36 that connects to the housing member 33, an exterior member 32 that is extrapolated to the housing cylinder 33, a writing tip 31 that is disposed at the tip of the joining member 36, and a tip holder 35 that is extrapolated to the writing tip 31. It is composed of At the tip of the refill 30, a writing tip 31 is provided in connection with the tube body 34, and ink inside the tube body 34 is ejected from the writing tip 31. Further, a pressurized gas 37 is sealed inside the housing cylinder 33. In addition, an exterior member 32 is provided on the outer periphery of the housing cylinder 33, and plays a role of protecting the housing cylinder 33, which increases gas permeability or swells when humidity increases. The housing cylinder 33 is made of a translucent resin, and is specifically made of an ethylene vinyl alcohol copolymer (EVOH). The exterior member 32 is also made of a translucent resin, specifically made of polypropylene (PP). Other examples of materials that can be used for the housing cylinder 33 include polyvinyl alcohol (PVA), polyacrylonitrile (PAN), and nylon. Examples of materials that can be used for the exterior member 32 include polyethylene (PE). , Polyolefin, cyclic polyolefin, polyethylene terephthalate (PET), and vinylidene chloride. The tube body 34 is made of transparent polypropylene (PP). If the tube body 34, the housing cylinder 33, and the exterior member 32 are formed to be transparent or translucent, the inside can be visually recognized, and for example, the amount of ink remaining inside can be grasped. The metal member 32b is made of stainless steel, is formed in a tubular shape, and its front end is bent inward. By extrapolating the metal member 32b and covering the joint portion between the joint member 36 and the housing cylinder 33, the strength of the joint portion is increased, and a high-grade appearance is imparted to the appearance of the refill 30. .

  FIG. 3 is a longitudinal sectional view of the shaft tube 10. A screw portion 10a is provided at the rear end of the shaft tube 10, and a knock mechanism portion 90 is screwed. A grip portion 10 e that is gripped by the user is formed in front of the outer surface of the shaft tube 10. A soft portion 10f is formed on the outer surface of the grip portion 10e to improve the user's grip feeling. A tip hole 10d is formed at the front end of the shaft tube 10, and a plurality of longitudinal ribs 10c formed in the longitudinal direction are formed at the rear thereof. When the writing tip 31 moves back and forth, the writing tip 31 is moved. Guide and prevent rattling during writing.

A protruding portion 10 b is formed on the inner peripheral surface of the shaft tube 10 along the longitudinal direction of the shaft tube 10. As shown in FIG. 4, four protrusions 10b are formed at 90 ° intervals in the circumferential direction. Each protrusion 10b has a part of the inner peripheral surface of the shaft cylinder 10 that is circular as a flat surface.
When the internal refill 30 is moved back and forth using the knock mechanism 90, the body portion 32c of the metal member 32b of the refill 30 and the non-exposed portion 32d formed in front of the body portion 32c move the surface of the protruding portion 10b. It will slide (see also FIG. 1). The non-exposed portion 32d is formed by bending the front end portion of the tubular metal member 32b inward, and the end portion is not exposed. In this way, the body 32c and the non-exposed part 32d where the end is not exposed protrude without sliding the exposed part 32e formed at the rear of the metal member 32b with the exposed end 32e to the protruding part 10b. Since it is made to contact | abut to the part 10b, it can reduce that the abrasion part generate | occur | produces in the protrusion part 10b. Moreover, the metal member 32b can be plated to suppress the occurrence of scratches, and the sliding portion can be lubricated.
Since one of the sliding members is made of metal, the sliding resistance can be reduced as compared with the case where the shaft tube and the refill are made of resin. In addition, the inner wall of the shaft tube 10 is formed with a projecting portion 10b projecting inward, and the metal member 32b is slid on the projecting portion 10b. It is possible to reduce the area in which the member 32b slides. For these reasons, it is possible to provide a knock-type writing instrument that gives the user a light knock feeling.

The shaft tube 10 and the soft portion 10f formed on the outer surface of the shaft tube 10 are formed transparent so that the inside can be visually confirmed. The scratch caused by the metal member 32b is formed on the surface of the protruding portion 10b, and this scratch can be recognized from the outside of the shaft tube 10. However, since the place where the scratch is formed is always on the surface of the protruding portion 10b, the design is not hindered as compared with the scratch formed unintentionally, and as a result, the value on appearance can be reduced. Absent.
In addition, the protrusion part 10b is not restricted to what formed the flat surface in a part of circular inner peripheral surface as shown in FIG. For example, dot-like protrusions can be formed, and rib-like protrusions formed along the longitudinal direction of the shaft tube 10 are also conceivable.
A non-sliding portion 10g where the metal member 32b is not slid is formed between the projecting portions 10b, and the non-sliding portion 10g is formed so as to face each other. The inside of the shaft tube 10 is made visible through the non-sliding portion 10g where no scratch is generated, and the inside of the shaft cylinder 10 is seen through from one non-sliding portion 10g by arranging the non-sliding portion 10g to face each other. In this case, since the light beam enters from the opposed non-sliding portion 10g, the internal see-through state is good.

Next, the knock mechanism 90 will be described with reference to FIG. A knock mechanism using a so-called known rotor is used for the knock mechanism 90.
An inner cylinder 70 is screwed to the rear end of the shaft cylinder 10, and the inner cylinder 70 forms a part of the shaft cylinder 10. On the inner peripheral wall of the inner cylinder 70, a plurality of cam grooves and a cam surface are formed at the front ends of the cam grooves. However, the cam groove and the cam surface are not shown in FIG.
From the rear end opening of the inner cylinder 70, the rear of the knock member 50 is disposed so as to protrude, a protrusion 51 inserted into the cam groove of the inner cylinder 70 on the outer peripheral surface, and the rotation of the rotor 60 on the front end edge. A knock member cam surface 52 that engages with the child cam surface 62 is formed.
A rotor 60 is provided in front of the knock member 50, and a plurality of protrusions 61 formed along the longitudinal direction are formed at the rear outer edge of the protrusion 61 on the front outer peripheral surface of the rotor 60. Thus, a rotor cam surface 62 that engages with the cam surface of the inner cylinder 70 and the knock member cam surface 52 of the knock member 50 is formed. A refill 30 is provided in front of the rotor 60, and the refill 30 also moves back and forth in the shaft cylinder 10 in conjunction with the back and forth movement of the rotor 60 due to the pressing force applied to the knock member 50.

When the knock member 50 is pressed forward (downward in the figure) against the elastic force of the coil spring 40 disposed in front of the shaft cylinder 10 from the state in which the writing tip 31 at the tip of the refill 30 is immersed in the shaft cylinder 10, After the rotor 60 moves forward with a rotational force applied by the knock member cam surface 52, the protrusion 61 of the rotor 60 is disengaged from the cam groove of the shaft cylinder 10, so that the rotor 60 rotates slightly and the knock member 50 is rotated. When the pressing is released, the rotor cam surface 62 of the rotor 60 urged rearward by the coil spring 40 is engaged with the cam surface of the inner cylinder 70, so that the writing tip 31 at the tip of the refill 30 is pivoted. The tube 10 is held protruding from the tip opening.
When the knock member 50 is pressed from the state in which the writing tip 31 at the tip of the refill 30 is protruded and held from the tip opening of the shaft tube 10, the rotor 60 is moved forward with the rotational force applied by the knock member cam surface 52. The engagement between the rotor cam surface 62 of the rotor 60 and the cam surface of the shaft cylinder 10 is released, and after the rotor 60 has slightly rotated, the protrusion 61 of the rotor 60 enters the cam groove of the shaft cylinder 10. Thus, the writing tip 31 at the tip of the refill 30 is accommodated in the shaft tube 10.

It is a longitudinal cross-sectional view which shows embodiment of this invention. FIG. 2 is an enlarged longitudinal sectional view showing an enlarged refill of FIG. 1. FIG. 2 is an enlarged vertical sectional view showing the shaft cylinder of FIG. 1 in an enlarged manner. FIG. 4 is a sectional view taken along line AA in FIG. 3. FIG. 2 is an enlarged vertical cross-sectional view showing an enlargement of the periphery of the knock mechanism portion of FIG. 1.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Shaft 10a Screw part 10b Projection part 10c Vertical rib 10d Tip hole 10e Grip part 10f Soft part 10g Non-sliding part 30 Refill 31 Writing chip 32 Exterior member 32b Metal member 32c Body part 32d Unexposed part 32e Exposed part 33 Accommodation Cylindrical body 34 Tube body 35 Tip holder 36 Joining member 37 Pressurized gas 40 Coil spring 50 Knock member 51 Projection 52 Knock member cam surface 60 Rotor 61 Projection 62 Rotor cam surface 70 Inner cylinder 90 Knock mechanism

Claims (3)

A barrel,
A writing chip, an ink storage tube with the writing chip fixed to the tip, and a refill made of ink stored in the ink storage tube.
A knock-type writing instrument comprising a knock mechanism that moves the refill back and forth and causes the writing tip to protrude from the tip of the shaft tube,
At least a part of the outer surface of the ink containing tube is provided with a metal member other than a writing chip,
A projecting portion projecting inward is formed on the inner peripheral surface of the shaft tube,
A knock type writing instrument, wherein the metal member slides on the projecting portion when the writing tip protrudes from and comes out of the shaft cylinder.   2. The knock type writing instrument according to claim 1, wherein at least the vicinity of the protruding portion of the shaft tube is formed to be transparent or translucent so that the inside of the shaft tube can be visually recognized. The knock-type writing instrument according to claim 2, wherein a non-sliding portion formed between the projecting portions and on which the metal member does not slide is formed to face the non-sliding portion.

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