JPH1120380A - Multi-lead writing instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent breakage of a lead as much as possible by disposing a writing element having low breakage strength of a lead except a position opposed to a clip. SOLUTION: In the multi-lead writing instrument, three types of mechanical pencils are, for example, slidably disposed, the pencil 13 having a thickest lead diameter and strong breakage strength is disposed at a position opposed to a clip 9, and other mechanical pencil 14 and the other one are disposed at a lateral side of the clip 9. At the time of writing on a writing surface P, an angle of the pencil 13 due to bending and an angle of the inclined instrument are superposed at the time of projecting the pencil 13 so that an angle formed between the surface P and the pencil 13 is reduced with the result that a lead is easily broken. Accordingly, a lead having a thick lead diameter is disposed in the pencil 13. In the case of projecting the pencil 14, since an angle of the pencil 14 due to bending and an angle for inclining the instrument are out of phase of 90 degrees, an angle formed between the element and the surface P is only the angle of the instrument.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-core writing instrument having a plurality of writing bodies having different breaking strengths of a core in a barrel, and a clip fixed to the outside of the barrel.

[0002]

2. Description of the Related Art As an example, there is Japanese Utility Model Publication No. 4-8000. The utility model registration claim states that "at least one of a plurality of writing elements, which are knock-type sharp pencil elements, is inserted into a guide groove of a cylinder connected to a shaft case, and said writing element is inserted into said guide groove." A slider is connected to the rear end of the element. The slider is further rotatably mounted on the outside of the cylinder. In a compound writing instrument comprising a cylindrical cam for alternately moving elements back and forth to a writing position, a knock member insertion hole is formed in a side surface of the rotatable cylindrical cam, and the knock insertion hole is axially integrated with a cap. The leading end of the knock member is brought into contact with the slider at the rear end of the sharp pencil element, and the reciprocating movement of the knock member is transmitted to the sharp pencil element as knock operation via the slider. The writing instrument is characterized in that it is configured to perform centering. "In FIG. 1 as an example, when a sharp pencil is projected, the clip is -A dual writing instrument is disclosed which is positioned opposite the pencil.

[0003]

As described above, as a method of using a writing instrument to which a clip is fixed, the clip is used with the clip facing upward, and the writing instrument itself is inclined (about 60 degrees). ) Is generally used. When the clip is used with the clip facing downward, the clip hits the base of the thumb and forefinger, and the gripping operation of the writing instrument becomes uncomfortable. Here, when trying to make the writing body disposed at a position facing the clip of the multi-core writing instrument to protrude from the barrel, the writing body curves along the inner inclined surface of the tip member of the barrel. While protruding.
Then, the angle between the writing surface and the writing tool becomes very small due to the angle of the writing tool and the angle of the writing tool itself, that is, writing is performed in a state where the writing tool is considerably laid down. When writing is performed in this state, the writing load is applied to the writing body in the lying state, and when the writing body is a sharp pencil, the core is broken.

[0004] On the other hand, even if the cursive object positioned on the clip side is protruded, the curving of the cursive object is on the opposite side to the angle of the pen itself. (In the direction that is phase-shifted by degrees), therefore, writing must be performed with the writing tool standing against the writing surface rather than at the angle of the writing implement itself. Also, the effect of breaking the core is small.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and has a plurality of writing bodies having different breaking strengths of a core in a shaft cylinder. The invention is characterized in that a writing body having a weak breakage strength of the core is arranged at a position other than the position where the clip is opposed.

[0006]

[Function] A writing body with a high core breaking strength is arranged at a position where the angle of the writing body with respect to the writing surface becomes small, and a writing body with a low core breaking strength at a place where the angle of the writing body with respect to the writing surface is large. Is arranged.

[0007]

1 to 4 show an example. This is a multi-core writing instrument in which three types of sharp pencils from which cores of different diameters are fed are slidably arranged. Not only mechanical pencils but also two types of sharp pencils and
It may be a combination with a pen, or a combination of two kinds of sharp pencils and two kinds (for example, red and black) of ball pens. All you need is at least one mechanical pencil. Reference numeral 1 denotes a shaft main body, and the shaft main body 1 includes a front shaft 2 and a rear shaft 3. Further, in this example, the front shaft 2 is formed by a screwing structure of the tip member 4 and the center shaft 5, but may be a means such as press-fitting or fitting, or is formed integrally. Is also good.

The rear shaft 3 has three slits 6 formed in its longitudinal direction. This is because three types of sharp pencils are arranged, and the number of the slits 6 naturally changes depending on the number of types of mechanical pencils or the total number of mechanical pencils and ball pens.
The slit 6 is formed up to one end of the rear shaft 3, and sliding grooves 7 are formed on both sides in the longitudinal direction of the slit 6. However, the sliding groove 7 is not formed over the entire length on both sides of the slit 6, but is formed only up to the intermediate portion. A leg 8 is formed in front of the rear shaft 3. The leg 8 is formed by forming the slit 6. Therefore, the number of legs 8 also changes depending on the number of mechanical pencils and ballpoint pens. The lengths of the legs 8 are not the same but different. Specifically, the left leg is formed to be shorter than the two right legs 8 in FIG. This is to facilitate the assembling of the rear shaft 3 to the center shaft 5. Reference numeral 9 denotes a clip portion integrally formed on the side surface of the rear shaft 3, but may be formed as a separate member and attached to the rear shaft 3, or a clip may be formed integrally with a slider described later. . However, in this example, the clip portion 9 is integrally formed on the rear shaft 3 as described above. The sliding resistance between the clip and the rear shaft, which is generated by fixing the clip to the slider, has been eliminated.

In the slit 6 of the rear shaft 3, there is slidably disposed a slider 10 for writing and retracting a sharp pencil, which is a writing body, and slides on both sides of the slider 10 in the longitudinal direction. A protrusion is formed and slidably engages with a slide groove 7 formed in the slit 6. Also,
Two release projections 11 and 12 are formed on the back surface of the slider 10 at intervals, respectively.
A press-fit portion 16 for connecting sharp pencils 13 to 15 is formed at a front end of the press-fitting portion 10. The sharp pencils 13 to 15 will be described in detail. The sharp pencil 13 located at a position facing the clip 9 has a core diameter of 0.7 mm, and is located on the side of the clip 9. The core diameters of the pupils 14 and 15 are 0.3
mm and 0.5 mm. In other words, a sharp pencil with the largest core diameter and strong breaking strength (core diameter 0.7 mm)
13 is arranged at a position facing the clip 9.

[0010] The slider for injecting and retracting the sharp pencil
A knock groove is formed at the center in the longitudinal direction of 10, and a knock piece (knock member) 18 having a knock bar 17 is slidably disposed in the knock groove.
Above the knock piece 18, an uneven portion 19 is formed to be a portion on which a finger or the like is put to operate the knock piece 18. Reference numeral 20 denotes a repelling member such as a coil spring for urging the sharp pencils 13 to 15 connected to the slider 10 backward.

A regulating portion 21 is formed at an intermediate portion of the center shaft 5, which is a member of the front shaft 2, and the regulating portion 21 has three through holes into which the mechanical pencils 13 to 15 are loosely inserted. 22 are formed. By locking one end of the elastic member 20 to the regulating portion 21, the mechanical pencils 13 to 15 are biased rearward. In addition, three grooves 23 are formed in the longitudinal direction on the inner side of the center shaft 5 and behind the restricting portion 21, and the leg portions 8 of the rear shaft 3 are slidably contacted with the groove portions 23. 8 is to be guided.

Next, the sharp pencil 13 (to 15)
Will be described (see FIG. 4). The rear of an outer shaft (outer member) 24 made of a resin or preferably a metal pipe is connected to a press-fit portion (connection portion) 16 of the slider-10. In addition, at the tip of the outer shaft 24, a relay member 25
The tip member 26 is detachably fixed via a screw thread or the like. A core feeding mechanism 27 is slidably disposed inside the outer shaft 24, the intermediate member 25, and the tip member 26. The lead mechanism 27 is
A core tank 28 made of a resin pipe such as polyethylene or polypropylene and a connecting member 2 in front of the core tank 28
The chuck body 30 includes a chuck body 30 fixed through the chuck 9, a chuck ring 31 for opening and closing the chuck body 30, a chuck spring 32 for constantly urging the chuck body 30 rearward, and the like. Reference numeral 33 is a center detent member for preventing the core from retracting during feeding.
In the present embodiment, the splicing member 25 is press-fitted to the outside of the front end of the outer shaft 24. The rear portion may be extended to be long and may be press-fitted outside the front end of the outer shaft 24.

Next, the operation will be described. When the user holds the hand and pushes the knock piece 18 forward, the slider 10 and the sharp pencil 13 move forward with the knock piece 18, but the sharp pencil 13 is bent by the inner inclined surface of the tip member 4. However, the tip of the tip member 26 protrudes from the tip of the shaft body 1. Simultaneously, the slider 10 is pushed into the inside of the shaft main body 1, and the retraction of the slider 10 is prevented. In other words, by forming the sliding groove 7 only up to the intermediate portion of the slit 6, the sliding groove 7 also serves as the engagement of the slider 10.

Here, in order to advance the lead, the knock piece 18 is pressed (advanced). As the knock piece 18 advances, the pressing portion 18a of the knock piece 18 presses the rear end of the core tank 28. By this pressing operation, the chuck body 30
Moves forward against the elastic force of the chuck spring 32.
Then, as the chuck body 30 advances, the lead is advanced and is drawn out from the lead protection tube 34 of the tip member 26. Next, writing on the writing surface P is performed. At this time, generally,
As shown in FIG. 1, the clip 9 is gripped so as to face the side opposite to the direction in which the writing instrument is inclined. As described above, the clip 9 hits the base between the thumb and the index finger,
This is because they feel uncomfortable. At this time, when the sharp pencil 13 projects, the angle formed by the bending of the sharp pencil 13 and the angle at which the writing instrument is inclined overlap, and the angle between the writing surface P and the sharp pencil 13 is extremely large. It is getting smaller. When the angle becomes small, the core is easily broken. Therefore, a core having a large core diameter is arranged on the sharp pencil 13. However, when the sharp pencil 14 is protruded, the angle formed by the curvature of the sharp pencil 14 and the angle when the writing implement is tilted are 90 degrees out of phase, so that the angle between the writing body and the writing surface P is formed. Is only the angle made by the writing implement.

Next, when it is desired to store the sharp pencil 13 in the shaft main body 1, another slider, for example, the slider of the sharp pencil 14 is pressed. When the slider of the sharp pencil 14 is pressed, the release protrusion 12 formed on the rear surface of the slider collides with the release protrusion 12 of the slider that is moving forward. By this collision action,
The slider of the sharp pencil 13 in the pressed state is pressed outward of the shaft body 1. By this pressing action, the engagement between the sliding projection of the slider and the sliding groove 7 is released, and the sharp pencil 13 which is in a protruding state by the releasing action is retracted by the action of the resilient member 20. It is immersed in the shaft body 1. In the present embodiment, the elastic force of the chuck spring 32 is set to be greater than that of the elastic member 20. However, the elasticity of the elastic member 2 may be set to the opposite state.
The repelling force of 0 may be set larger, but when the sharp pencil is projected, the chuck spring is projected while being pressed, so that the core can be extended at the same time. In such a case, the pressure input to the outer shaft 22 of the slider 10 is set large. Specifically, it is set to such a degree that it does not fall off due to the elasticity of the elastic member 20.

Next, FIG. 5, FIG. 6 and FIG.
And will be described. This is an example in which two sharp pencils 14 and 15 and one ball pen 35 are housed. Clip 9
The sharp pencils 14, 1
5 are arranged, and at a position facing the clip 9,
A ball pen 35 is arranged. The ball pen core (chip) 36 is arranged as described above because the core breakage strength is higher than that of the sharp pencil core. In other words, a sharp pencil having a core with a low breaking strength is arranged on the side close to the clip. As shown in FIG. 6, the ball pen 35 includes an ink tank 38 made of a resin pipe such as polyethylene or polypropylene for storing ink 37, and a ball pen tip 36 press-fitted and fixed to the front end of the ink tank 38. It is composed of At the tip of the ball pen tip 36, a ball 39 serving as a discharge section of the ink 37 is rotatably arranged. As shown in FIG. 7, two ball pens may be arranged (red and black) (ball pens 40 and 41) and one sharp pencil (sharp pencil 14) may be used. Also in this case, the sharp pencil is arranged on the side close to the clip 9.

[0017]

According to the present invention, there is provided a multi-core writing instrument having a plurality of writing bodies having different breaking strengths of a core in a barrel, and a clip fixed to the outside of the barrel, wherein the breaking strength of the core is reduced. Since the weak cursive is arranged at a position other than the position where the clip faces, the breakage of the core can be prevented as much as possible.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a partial external view showing a first example of the present invention.

FIG. 2 is a view taken in the direction of arrow A in FIG. 1;

FIG. 3 is a sectional view taken along line BB of FIG. 1;

FIG. 4 is a longitudinal sectional view showing a sharp pencil.

FIG. 5 is a cross-sectional view illustrating a modification and corresponding to FIG. 3;

FIG. 6 is a longitudinal sectional view showing a ball pen.

FIG. 7 is a cross-sectional view illustrating a modification and corresponding to FIG. 3;

[Explanation of symbols]

 Reference Signs List 1 shaft main body 2 front shaft 3 rear shaft 4 front member 5 center shaft 6 slit 7 sliding groove 8 legs 9 clip portion 10 slider (pressing member) 11 release protrusion 12 release protrusion 13 sharp pencil 14 sharp pencil 15 sharp Pencil 16 Press-fitting part 17 Knock rod 18 Knock piece 19 Uneven part 20 Repellent member 21 Restriction part 22 Through hole 23 Groove part 24 Outer shaft 25 Intermediate member 26 Tip member 27 Core feeding mechanism 28 Core tank 29 Connection member 30 Chuck body 31 Chuck ring 32 Chuck spring 33 Core detent member 34 Core protection tube 35 Ball pen 36 Tip 37 Ink 38 Ink tank 39 Ball 40 Ball pen 41 Ball pen P Writing surface

Claims (1)

[Claims] 1. A multi-core writing instrument having a plurality of writing bodies having different break strengths of a core in a barrel, and a clip fixed to the outside of the barrel, wherein the writing body having a weak break strength of the core is provided. A multi-core writing instrument, which is arranged at a position other than the position where the clip faces.