JP2001180173A - Ballpoint pen - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a ballpoint pen capable of being collected as source separated refuse according to materials. SOLUTION: A ballpoint pen tip 5 is relatively backward moved to a tip holder 4. A bar-like part 12 is contacted with a ball 5a to lift the ball. The end opening 10 of the holder 5b is pushed and flared to remove the ball 5a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a ball as a writing member and a front end opening which is crimped inward to a diameter smaller than the diameter of the ball while accommodating the ball in a through hole as an ink passage. A ballpoint pen tip comprising a ball holder that partially holds and holds the ball,
A ball-point pen connected directly to an ink tank or via a joint member, wherein the ball and the ball holder are composed of a cemented carbide ball, a polyoxymethylene resin ball holder, and a cemented carbide ball. And a ball holder made of different materials such as a ball holder made of stainless steel.

[0002]

2. Description of the Related Art Conventionally, as a ballpoint pen tip, a so-called metal tip ballpoint pen in which a ball made of a super hard material is held in a metal ball holder made of stainless steel, nickel silver or the like is known. A so-called resin chip ballpoint pen having a ball holder made of polyoxymethylene resin is also commercially available. This resin chip ballpoint pen has an advantage that a soft writing feeling can be obtained because the superhard material ball is in contact with a synthetic resin that is softer than metal when the ball and the ball holder do not come into contact with each other. Was.

[0003]

There are various types of parts constituting a writing instrument using ink, and at least a member constituting a pen tip and a member constituting an ink tank are required. Many low-cost writing implements that use a large amount of ink are disposable without replacing the so-called ink. There is also known an ink cartridge or a pen tip in which a refill having an ink tank and a pen tip is replaceable. However, an ink cartridge or a refill that has run out of ink is eventually discarded.

[0004] In recent years, attention has been paid to recycling in consideration of effective use of resources, and separation and collection of garbage and waste materials are widely performed. Most of the components that make up the writing implement can be divided into components made of each material, and can be discarded separately like metal and synthetic resin, but extremely fine components such as ballpoint pen tips Then, it was difficult to separate the ball from the ball holder. Such a problem occurs not only in the case of a ballpoint pen tip made of a metal and a synthetic resin, but also in a case where it is desired to collect cans separately in a steel can and an aluminum can. This was a problem that could occur between similar materials.

[0005]

That is, according to the present invention, a ball as a writing member and the ball are housed in a through hole as an ink passage, and are caulked inward to a diameter smaller than the diameter of the ball. A ball-point pen in which a ball-point pen made up of a ball holder that partially holds and holds the ball from a tip end opening is connected to an ink tank directly or via a joint member, wherein the ball and the ball holder In the ink tank or joint member connected to the ballpoint pen tip, the ink tank or the joint member communicates with the through-hole of the ball holder, and the ink penetrates to the vicinity of the ball or at a position where the ball-tip is in contact with the ball. And a ball-shaped body extending up to the joint member. When the ball holder is moved relatively backward with respect to the ink tank or the joint member, the rod-like body relatively pushes the ball forward, and this pushing force is applied. The gist of the ballpoint pen is characterized in that the ball deforms outwardly at the tip end opening edge of the ball holder in which the ball is crimped inward, so that the ball can be removed from the ball holder.

[0006]

By moving the ball holder rearward relative to the connection member of the ballpoint pen tip, the tip of the rod-shaped body formed on the connection member moves forward relative to the ball holder. When the rod and the ball come into contact with each other and the rearward movement of the ball holder further proceeds, the crimped portion of the ball holder holding the ball loses and deforms, and the ball is removed. As a result, the ball and the ball holder can be separated and put on the collection / reproduction path. In addition, if the ball holder and the connecting member such as the ink tank and the joint member are connected by a screwing relationship, the ball holder does not normally recede due to the writing pressure at the time of writing and when it is desired to remove the ball. By rotating the ball holder relatively, the ball holder can be moved backward. Further, if a removable rearward movement restricting member is arranged between the step portion of the connecting member and the ball holder, the ball holder does not normally recede with writing pressure at the time of writing and when it is desired to remove the ball. The ball holder can be moved backward.

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. In FIG. 1, a pipe body made of a polypropylene resin is used as an ink tank 1 and contains an ink 2 and a backflow prevention body 3 that moves following the ink interface, and a tip made of a polyoxymethylene resin at the front end. This is a so-called raw ink type ballpoint pen refill in which a ballpoint pen tip 5 is connected via a holder 4. Ballpoint pen tip 5
Is a super hard ball 5a as a writing member and this ball 5
and a ball holder 5b made of a polyoxymethylene resin that protrudes and holds a.

As shown in FIG. 2A, which is an enlarged view of a portion I in FIG. 1, the ball holder 5b has a ball receiving seat 7 in the ink through hole 6, and the ball receiving seat 7 has a center. A radial ink passage 9 is formed in communication with the hole 8.
The distal end opening 10 of the ball holder 5b has a small diameter portion, and holds the ball 5a with the ball receiving seat 7. Further, the tip holder 4 is formed integrally with a rod-shaped portion 12 inserted into the ink through hole 6 of the ball holder 5b from behind at the center of the inner ink through hole 11.
The portion that supports the rod-shaped portion 12 is a plurality of radial ribs 13, between which an ink through-hole 14 is formed.
The tip of the rod-shaped portion 12 is formed to have a smaller diameter than the inner diameter of the center hole 8 formed in the ball receiving seat 7, and can pass through the center hole 8 and contact the ball 5a.

In the initial state used for writing, the rod portion 12 is not in contact with the ball 5a. On the inner wall of the chip mounting recess 15 of the chip holder 4, a circumferential inward convex portion 16 is formed at an opening portion, and the insertion portion 17 of the ballpoint pen tip 5 into the chip mounting recess 15 has the above-described initial state. An outer convex portion 18 that is in pressure contact with the inner convex portion 16 is formed. The pressure-contact relationship between the inner convex portion 16 and the outer convex portion 18 is set so that the ball holder 5b does not recede even when the ball 5a is pressed by the pen pressure. For example, the height in the radial direction of each of the convex portions 16 and 18 may be increased so as to form a strong press fit, or the contact surface of each may be formed into a matte surface having fine irregularities to control frictional resistance. You can do things.

Referring to FIG. 2B, the operation of the above-described device will be described. That is, a force greater than the pen pressure is applied to the tip of the ballpoint pen tip 5 to relatively move the inner convex portion 16 and the outer convex portion 18 which are pressure contact portions that do not move with the pen pressure. That is, the ballpoint pen tip 5 moves relatively rearward (ink side) with respect to the tip holder 4,
The rod portion 12 comes into contact with the ball 5a. When further pushed, the contact range between the convex portions of the inner convex portion 16 and the outer convex portion 18 is released, and the pressure input sharply decreases and the ballpoint pen tip 5 easily moves backward.
2 pushes up the ball, pushes open the tip opening 10 of the ball holder 5b, and the ball 5a is removed. Thus, the metal ball 5a and other resin members can be separated and collected.

FIG. 3 shows another example. It is shown as a cross-sectional view of a main part corresponding to FIG. The difference from the above-described example is that, in the above, the portions corresponding to the inner convex portion 16 and the outer convex portion 18 have the inner screw portions 1 so as to have a screwing relationship.
9, the outer thread portion 20 is provided. Unlike the above example, it can be said that the ball holder 5b does not recede even if a strong writing pressure is applied as long as the screwing relationship is maintained.
In order to remove the ball 5a from the ball holder 5b, the ball holder 5b is rotated along a screw and retracted. Another difference is that the tip of the rod portion 12 of the chip holder 4 has a larger diameter than the center hole 8 of the ball holder 5b, so that the ball 5a can be removed without directly pressing the ball 5a. It is assumed that the receiver 7 is pressed. When the ball holder 5b is rotated along the screw and retracted, the rod-shaped portion 12 advances relatively and pushes up the ball receiving seat 7, and as a result, the ball 5a pushes and expands the tip opening 10 of the ball holder 5b. The ball 5a is removed. The inner screw portion 19 and the outer screw portion 20 are coated with a high-viscosity fluid that is incompatible with the ink used, so that the ink does not leak from the screw portions.

FIG. 4 shows still another example. This is an example of the connection relationship between the ball holder 5b and the chip holder 4. (A) is a normal written state, (b)
(A) is a sectional view taken along the line II-II ′ of (a), and (c) is a longitudinal sectional view when the ball 5a is removed. As shown in FIG. 4A, the insertion portion 17 which is a connecting portion of the ball holder 5b to the chip holder 4 has a cylinder inserted into the chip mounting recess 15 of the chip holder in the writing state (a). A fitting insertion portion 22 which is in contact with the chip holder 4 by the portion and the step portion 21 is formed. On the other hand, the chip mounting recess 15 of the chip holder 4 also has a sliding contact portion 23 having a circular cross section and a fitting sliding contact portion 24 located forward of the sliding contact portion 23. As shown in (b), the fitting insertion portion 22 is formed in a quadrangular prism shape in appearance, and the fitting sliding contact portion 24 is a hole of substantially the same shape in which the fitting insertion portion 22 fits. That is, in (b), when the ball holder 5b is rotated in the direction of arrow III,
And the fitting portion 24 fits in shape, and the ball holder 5b can be retracted. Accordingly, the state shown in FIG. 2C is reached, and the rod-shaped portion 12 is moved to the center hole 8 as in the example shown in FIG.
The ball 5a comes off from the tip by coming into contact with the ball 5a. Note that the fitting insertion portion 22 and the fitting sliding contact portion 24
May be any shape as long as the step 21 is formed, and may be an ellipse, an ellipse, a star, or the like in addition to a polygon.

FIG. 5 shows still another example. Unlike the above-described example, a so-called batting-type ball-point pen in which an ink occluding body 25 made of a fiber bundle is disposed inside the barrel 101 as a writing instrument, and a ball-point pen tip 5 is directly attached to a small-diameter end of the barrel 101. This is an example. The ink connection between the ballpoint pen tip 5 and the ink occluding body 25
This is performed by the ink relay core 26, which is a rod made of a fiber bundle adjusted so that the capillary force is slightly stronger than that of the ink. Reference numeral 27 denotes a tail plug fitted to the rear end of the barrel 101. Further, an air hole 28 communicating with the inside of the barrel 101 is formed in a tip portion of the barrel 101 within a range covered by a cap (not shown).

As shown in FIG. 6, which is an enlarged view of the IV section in FIG. 5, the ball holder 5b is
Is press-fitted and fixed. However, a C-ring 30 made of synthetic resin is disposed in a gap between the ball holder 5b and the shaft cylinder 101 formed in the initial state. When removing the ball 5a, the C ring 30 is elastically deformed and removed, and if the ball holder 5b is retracted with a force exceeding the pressing force between the inward convex portion 16 and the ball holder 5b, the rod-shaped portion 12 is removed. Presses the ball receiving seat 7 to push up the ball 5a. The rod-shaped portion 12 formed integrally with the shaft cylinder 101 has a center hole 29 communicating with the inside of the shaft cylinder 101, and the ink relay core 26 is inserted to reach the rear end of the ball receiving seat 7. ing. In the case where the C ring 30 is used to prevent the initial state from retreating as in this example, a large gap can not be seen in appearance.
It can be said that it is preferable in design.

Various modifications can be made without departing from the gist of the present invention. For example, ball 5
The rod-shaped portion 12 for pushing up a may not be formed integrally with the chip holder 4 or the shaft cylinder 101, but may be provided with another member. Assuming that the radial ink passage groove 9 is formed, the ball holder 5b may not be provided with the ball receiving seat. In the above-described example, the ball holder is made of synthetic resin and the ball is made of metal. However, both the ball and the ball holder may be made of metal or synthetic resin. This is because even if a combination of the same kind of material is used, if the material is different, it may be a target of separation and collection. Further, in order to assist the separation and recovery, all the synthetic resin members may be made of olefin.

[0016]

As described above, the ballpoint pen of the present invention can be used for recycling various materials because the ball and the ball holder can be separated and sent for collection when the ballpoint pen is no longer used and is discarded. Can contribute to the effective use of resources.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an example.

FIG. 2A is an enlarged view of a portion I in FIG. 1; (B) A longitudinal cross-sectional view illustrating a state in which the ball is removed.

FIG. 3 is a diagram corresponding to FIG. 2A showing another example.

FIG. 4 (a) is a diagram corresponding to FIG. 2 (a), showing still another example.
FIG. 4B is a sectional view taken along line II-II ′ of FIG. (C)
FIG. 3 is a longitudinal sectional view illustrating a state in which a ball is removed.

FIG. 5 is a longitudinal sectional view showing still another example.

FIG. 6 is an enlarged view of an IV section in FIG. 5;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Ink tank 2 Ink 3 Backflow prevention body 4 Chip holder 5 Ballpoint pen tip 5a Ball 5b Ball holder 6 Ink hole 7 Ball receiving seat 8 Center hole 9 Ink groove 10 Tip opening 11 Ink hole 12 Rod 13 Radial rib 14 Ink passage hole 15 Chip mounting recess 16 Inner convex part 17 Insert part 18 Outer convex part 19 Inner screw part 20 Outer screw part 21 Step part 22 Fitting insertion part 23 Sliding contact part 24 Fitting sliding contact part 101 Shaft cylinder 25 Ink storage Body 26 Ink relay core 27 Tail plug 28 Air hole 29 Center hole 30 C-ring

Claims (3)

[Claims] 1. A ball as a writing member and a part of the ball, which is accommodated in a through hole as an ink passage, is partially protruded from a distal end opening portion caulked inward to a diameter smaller than the diameter of the ball. A ball-point pen formed by connecting a ball-point pen comprising a ball holder and holding the ball directly to the ink tank or via a joint member, wherein the ball and the ball holder are made of different materials. A rod-like body extending to the vicinity of the ball or to a position in contact with the ball is arranged and fixed in an ink through hole communicating with the through hole of the ball holder of the ink tank or the joint member connected to the ballpoint pen tip. In addition, the ball holder can be moved backward relative to the ink tank or the joint member. None, when the ball holder is moved backward relative to the ink tank or the joint member, the rod pushes the ball relatively forward, and the pushing force causes the ball to crimp inward. A ball-point pen characterized in that an edge of a tip end opening of the ball holder is deformed outward so that the ball can be removed from the ball holder. 2. The ball holder and an ink tank or joint member to which the ball holder is connected can move the ball holder relatively rearward with respect to the ink tank or the joint member by a screwing relationship. The ballpoint pen according to claim 1, wherein the ballpoint pen is connected. 3. An ink tank or a joint member to which the ball holder is connected, wherein a step which can regulate the backward movement of the ball holder is formed, and the step can be removed between the step and the ball holder. The ballpoint pen according to claim 1, further comprising a rearward movement restricting member.