JP2001341492A - Knock type writing utensil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a knock type writing utensil mainly using a pressure type ball point pen refill, capable of preventing the non-uniform abrasion of the tip leading end part and rich in display or pleasure properties. SOLUTION: In the knock type writing utensil equipped with a delivery mechanism part wherein a ball point pen refill housing writing ink is energized rearwardly by a return spring to be housed in a shaft cylinder in a freely slidable manner, and a knock rod having a cam and a rib and a rotary element are mounted in the shaft cylinder itself or in the cam groove of the inner cylinder provided in the shaft cylinder in a freely axially movable manner and the tip leading end part of the ball point pen refill becomes possible to go in and out with respect to the leading end port of the shaft cylinder by pressing the knock part protruded from the rear end of the shaft cylinder, the ball point pen refill is connected to the rotary element to cooperate with the rotary element to make the ball point pen refill rotatable and a mark or picture is provided to the outer peripheral surface of an ink housing part and the shaft cylinder is made opaque or almost opaque and a region capable of seeing the interior of the shaft cylinder in a transparent state is provided at a predetermined place in an axial direction and the mark or picture provided to the ball point pen refill can be seen from this region.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved knock-type writing instrument in which a tip portion of a ball-point pen refill can be protruded and retracted from a tip end of a shaft cylinder by pressing a knock portion.

[0002]

2. Description of the Related Art Conventionally, there has been provided a so-called feeding mechanism for causing a tip end of a ball-point pen refill to protrude and retract from a tip end of a shaft cylinder by rotating a rotor in a cam portion in a shaft cylinder by pressing a knock portion. Knock-type writing instruments are well known. Also, the ballpoint pen refill is slidably housed in the shaft cylinder by urging it backward with a return spring so that the tip of the tip can protrude and retract from the front end opening of the shaft cylinder. The rotor rotates when pressed, but the normal ballpoint refill does not rotate in accordance with the rotation of the rotor.

Further, the inside of the ink container is sealed, and a gas such as nitrogen gas, air, argon gas, or a volatile solvent gas is sealed in the rear end of the ink.
A so-called pressurized ballpoint pen is known which is pressurized from a (1 atm) or more to about 506625 Pa (5 atm).

[0004] In addition, the above-mentioned knock-type writing implement may be required to have good display and playability in addition to the original writing function. As one of the means, a picture etc. is provided on parts related to the writing function and parts not related to the writing function provided in the transparent barrel, and the picture etc. There are known movements related to the movement of the object.

[0005]

By the way, most writing instruments are provided with clips so that they can be clamped in pockets or the like. Therefore, at the time of writing, the gesture such as grasping the clip upwards is determined by the individual, so that the clip does not get in the way or does not cause discomfort by touching the hand, the position where the writing instrument is gripped is fixed. I will. Also, it is unlikely that the user will change the grip position every time he writes.

Therefore, if only the same portion of the tip of the tip is used at the time of writing, a writing load acts on only the same portion of the ball holding portion of the tip holding the tip ball and the ball receiving seat. As a result, only that part is worn unevenly. (Partial wear) As a result, there is a problem that a handwriting line is blurred due to ink leakage from the tip of the chip or poor ink flow caused by uneven rotation of the ball. Also, in the case of oil-based ballpoint pens that use medium- and high-viscosity inks containing non-drying or non-volatile solvents as main solvents, which are generally said to be resistant to such chip abrasion, when the ball diameter is less than 0.7 mm Tends to suffer from such uneven wear. (Note that the lower limit of the ball diameter considered in the design of a normal oil-based ball-point pen tip is 0.1 mm.) Even when the ball diameter exceeds 0.7 mm, a water-based ink that is more liable to wear is used. In the ballpoint pen, the adverse effects due to uneven wear were even more remarkable. (Note that the ball diameter usually considered in designing a water-based ball-point pen tip is 0.1 to 1.5 mm.
Range. )

Further, a pressurized ballpoint pen in which the inside of the ink containing tube is sealed and a pressurized gas is sealed in the rear end of the ink allows smooth flow of high-viscosity ink, direct current problems of ink and air. The problem of dry-up due to entrainment and volatilization is solved, and there is the advantage of robustness over the service life and the advantage of enabling upward writing.However, if uneven wear as described above occurs, the DC problem of writing spots and ink becomes noticeable. At first, there is a problem that writing becomes impossible due to a decrease in pressure, or in a severe case, the tip ball falls off, and the adverse effect of uneven wear on a normal ballpoint pen is even more remarkable.

Accordingly, an object of the present invention is to provide a knock-type writing instrument mainly using the above-mentioned pressurized ballpoint pen refill, which can solve the above-mentioned problems, and furthermore, has a display property in cooperation with the above-mentioned solution of the problems. It is intended to provide a knock-type writing instrument that is rich in playability.

[0009]

The present invention has the following arrangement to achieve the above object. The knock-type writing implement according to the first aspect of the present invention is configured such that the ball-point pen refill containing the ink for the writing implement is slidably housed in the shaft cylinder by urging the ball-point refill with a return spring backward. A knock rod having a cam and a rib and a rotor are fitted into the cam groove of the inner cylinder provided therein so that the shaft can freely move, and the knock rod protruding from the rear end of the shaft cylinder is pressed, thereby interlocking. In a knock-type writing instrument provided with a feeding mechanism that allows a tip end of a ball-point pen refill to be able to protrude and retract from a tip end of a barrel, the ball-point refill is connected to the rotor, and interlocks with rotation of the rotor. The ballpoint pen refill becomes rotatable, and marks and pictures are provided on the outer peripheral surface of the ink storage unit.
It is made opaque or substantially opaque, and a portion where the inside of the barrel is visible in a transparent state is provided at a predetermined location in the axial direction,
A knock-type writing instrument characterized in that a mark, a picture, and the like provided on a ballpoint pen refill can be seen through the part.

A knock type writing instrument according to a second aspect of the present invention is the knock type writing instrument according to the first aspect, wherein the barrel has an opaque or substantially opaque rear shaft and an opaque or substantially opaque front shaft. , And a transparent ring portion is provided in the middle connecting the rear shaft and the front shaft.

According to a third aspect of the present invention, there is provided the knock-type writing instrument according to the first aspect of the present invention, further comprising a tail plug attached to an outer peripheral portion of a rear end of the ballpoint pen refill or a rear end of the ballpoint refill. The shaft extending from the end is removably engaged with a fitting hole provided in front of the rotor by frictional engagement or by providing a locking portion between the shaft and the fitting hole. It is characterized by.

According to a fourth aspect of the present invention, there is provided a knock-type writing instrument according to the first aspect, wherein a sliding member is sandwiched between step portions of a ball-point pen refill with which a rear end of a return spring abuts. The rear end of the return spring is in contact with the front end of the sliding member.

According to a fifth aspect of the present invention, there is provided a knock-type writing instrument, wherein a ball-point pen refill containing ink for a writing instrument is slidably accommodated in a shaft cylinder by being urged rearward by a return spring. Alternatively, a knock rod having a cam and a rib and a rotor are fitted in a cam groove of an inner cylinder provided in the barrel so as to be able to shift freely, and a knock part protruding from a rear end of the barrel is pressed. Accordingly, in a knock-type writing instrument having a feeding mechanism that allows the tip end of the ball-point pen refill to move in and out of the tip end of the barrel, the ball-point refill is connected to the rotor, and the rotation of the rotor And the ball-point pen refill is rotatable in conjunction with the rear end of the ink, and the rear end of the ink is provided to be pressurized.

[0014]

1 to 4 show an embodiment of the present invention. First, as shown in the figure, the ball-point pen refill 15 is urged rearward by the return spring 14 and housed slidably in the barrel 2.

The barrel 2 has a rear shaft 7 formed of an opaque or substantially opaque synthetic resin or the like, and an opaque front portion 3a at the front end of a front shaft 3 formed of a transparent synthetic resin or the like so as to be detachable. An opaque base 3b is fixed to the front end of the front end thereof, and the grip portion of the front shaft (position to be gripped with a finger when writing)
An opaque or substantially opaque front shaft grip portion provided by externally fitting a grip 3c formed of opaque or substantially opaque natural rubber, synthetic rubber, or other elastic resin; a rear shaft 7 and a front shaft 3; And a transparent ring portion 4 is provided in the middle to connect the two. In addition, the above substantially opaque refers to those having colored transparent or opaque prints on the surface, and those in which opaque fillers and the like are mixed in a transparent resin,
The colors and indications inside cannot be clearly seen.

The shaft cylinder 2 has a non-circular cross section in each part in consideration of design and usability, and the ridge lines 5 and 6 on both sides of the ring portion 4 have appropriately curved lines. The grip 3c, the ring portion 4, and the rear shaft 7 are connected in a state where they are positioned by engagement of a fitting rib and a fitting groove provided therebetween. Of course, the barrel 2 may be a cylinder,
The ring part 4 may have a ridge line perpendicular to the axis.

A mark, a picture, or the like is provided on the outer peripheral surface of the ink storage portion of the ball-point pen refill 15 described later in a state where a mark, a picture, or the like is attached thereto, so that the ring portion 4 can be seen through.

There are many means for making the inside of the barrel visible from a part of the opaque barrel. That is, the above-mentioned tip shaft 3
Can be achieved also by making the window opaque and forming a window at a portion located on the transparent ring portion 4. It can also be achieved by making the front shaft transparent and forming a window in the opaque ring. Still further, it can be achieved by forming a window in an opaque grip that fits over the transparent front shaft. However, any of the above means is formed as a window framed on one side of the shaft cylinder.

The dispensing mechanism used in the knock-type writing instrument of the present invention has the same structure as the well-known Kern-type knock mechanism. That is, a cam groove for guiding and rotating the rotor so as to be able to move back and forth is formed in the inner hole of the shaft cylinder, the rotor is provided in engagement with the cam groove, and the rotor is provided at the rear end of the rotor. A structure in which a knock bar is arranged, which is engaged with a cam groove for sliding and imparting rotation,
By pressing a knock portion provided at the rear end of the knock bar protruding from the rear end of the barrel, the tip end of the ballpoint pen refill can be protruded and retracted from the front end opening of the barrel.

As shown in FIG. 3, the feeding mechanism of the embodiment comprises an inner cylinder 8 having a cam groove 8a in an inner hole of the rear shaft 7, and an inner step 7b formed in the inner hole of the rear shaft 7. And the rotor 9 and the rib provided on the knock bar 10 are engaged with the cam groove 8a thereof, and are fixed to the rear end of the knock bar 10. A knock spring is laid between the front end of the knock portion 11 and the rear end of the inner cylinder 8, and the knock bar 10 is urged rearward of the shaft cylinder. Further, the cam provided at the rear end of the rib of the rotor 9 and the cam provided at the front end of the rib of the knock bar are engaged with each other, and the knocking portion 11 is provided at the rear end of the rib of the rotor 9 by pushing forward. When the cam of the knock rod 10 and the cam portion formed on the front surface of the cam groove 8a of the inner cylinder cooperate with each other to rotate the rotor 9 at a predetermined rotation angle and lock it at the forward / backward retreat position. Is done.

On the other hand, a ball-point pen refill 15 as a pressurized ball-point pen has a small-diameter portion 17b at the front and a slightly large-diameter ink storage portion 17a at the rear end via a step 17c.
Of the ink storage tube 17 provided with the
b, a tip 16 of a ball-point pen is fixed to the front end, ink is filled into the ink storage portion, and a float 18 is provided at the rear end of the ink. Further, nitrogen gas, air, argon gas, A gas such as a volatile solvent gas is sealed, and the pressure is 101325 Pa at atmospheric pressure.
A plug 2 made of an elastic body closely fitted to the inner peripheral surface of the ink storage tube at the rear end of the ink storage tube 17 in a state of being pressurized from (1 atm) or more to about 506625 Pa (5 atm).
0 and a tail plug 19 for securely fixing the plug 20 to the rear end thereof.

The tip 16 of the ballpoint pen is provided with a spring for pressing the back surface of the tip ball in the inner hole of the tip according to set conditions such as the type of ink, the amount of ink flow, and the tip ball diameter. . An appropriate numerical range is determined for the pressing force depending on the conditions, but generally 0.0098 N
(1 gf) to 0.98 N (100 gf). In addition, the ink storage tube 17 has robustness, ink evaporation,
Metal tubes with surface treatment such as plating on stainless steel or brass tubes are used for reasons such as leakage of pressurized gas and increasing the amount of ink loaded, but resin tubes such as polypropylene and polyethylene terephthalate are selected. It is also possible. Further, the float 18 is provided because the boundary between the rear end of the ink and the front end of the pressurized gas needs to be neatly separated, and moves forward following the consumption of ink accompanying writing. or,
As the member, resin, silicone rubber, grease, gel-like body, or the like is selected.

The ballpoint pen refill 15 is coupled to rotate in conjunction with the rotor 9. As shown in FIG. 3, a fitting hole 9a is provided in front of the rotor 9, and the outer periphery of the rear end of the ballpoint refill 15 is frictionally engaged with the fitting hole 9a. For this purpose, engagement ribs are provided at required places on the inner peripheral surface of the fitting hole 9a. Further, a locking portion that can be elastically engaged between the outer peripheral portion of the tail plug and the inner peripheral portion of the fitting hole can be formed.

FIG. 5 shows another means for engaging the ballpoint pen refill with the rotor. This ball-point pen refill 24 is almost the same as the above-mentioned ball-point pen refill 15, and only the tail plug 25 is different. A shaft portion 25a extending to the rear end of the tail plug 25 is provided appropriately thinner than the outer periphery of the ink storage tube, and is engaged with the fitting hole 26a of the rotor 26 in the same manner as described above. In this case, the outer diameter of the ballpoint pen refill 24 can be increased within a range that does not interfere with the inner circumference of the front shaft 3, and therefore, the amount of ink loaded can be increased.

The ballpoint pen refill 21 shown in FIG.
Is the same as the ball-point pen refill 15 described above, but is in contact with the step 22a and the sliding member 23
Is loosely fitted. By bringing the rear end of the return spring into contact with the front end of the sliding member 23, even if there is a burr on the end surface of the return spring, the ballpoint pen refill 21 smoothly rotates in conjunction with the rotor without being caught.

[0026]

The operation based on the above embodiment will be described below. First, when the rear end of the knock portion 11 is knocked and the knock bar 10 is advanced, the rotor 9 is rotated and positioned at the advanced position, and the tip of the tip 16 projects from the tip of the base 3b, as shown in FIG. Be in a writing state. Further, when knocking from this state, the rotor 9 rotates to the retreat position, and the tip 16
Is immersed through the tip mouth. At this time, since the ball-point pen refill 15 and the rotor 9 are connected to each other, the tip of the tip projects and sinks while rotating with the rotor 9. That is, the rotor rotates each time the knock is applied, and the ballpoint refill rotates reliably in accordance with the rotation. However, since the rotor rotates by a constant angle, writing is performed at several points instead of one point in the related art, so that uneven wear hardly occurs.

If a sliding member 23 is provided at the front end of the step portion 22a of the ballpoint pen refill 21 as shown in FIG.
Even if there is a burr on the rear end surface of the return spring, the rotation of the ballpoint pen refill 21 is not hindered. still,
As for the material of the sliding member, it is preferable to use a resin having a low friction coefficient such as nylon or polyacetal mixed with a lubricant, and a sintered metal impregnated with a lubricant may be used.

Therefore, if uneven wear occurs with respect to a normal ball-point pen, the problem of writing spots and direct current of ink appears remarkably, and finally the writing becomes impossible due to the pressure drop, and in the worst case, the tip ball falls off. There is guaranteed the safety of the pressure ballpoint pen.

The barrel 2 is provided with an opaque rear shaft 7, an opaque front shaft grip portion, and a transparent ring portion 4 provided between the rear shaft 7 and the front shaft 3. In this case, it is possible to provide playability by exposing or hiding a mark or picture provided on the ballpoint pen refill from the ring portion in a state where the writing tip protrudes and is stored. In addition, the color of the ink and the thickness of the drawing line are displayed on the ballpoint pen refill, and the contents of the writing implement can be confirmed when the cursive writing is stored. In addition, by providing a complicated ridgeline on the ring part or providing a window part that can be seen only from one side instead of a transparent ring part, the combination of the reversal of the ballpoint pen refill and the rotation position that deviates at a certain angle Utilization can provide a more complicated and playful one.

Also, the barrel 2 is formed by a colored transparent rear shaft 7, a colored transparent front shaft grip portion, and an intermediate transparent ring portion 4 or one side connecting the rear shaft 7 and the front shaft 3. When a visible window is provided, the mark and picture provided on the ballpoint pen refill can be displayed or erased in accordance with the reversal of the ballpoint pen refill by making the same color as the transparent coloring. . In addition, it is also possible to change the mark or the picture by providing the same color as the transparent coloring in a part of the mark or the picture.

Further, the barrel 2 is provided by directly connecting the colored and transparent rear shaft and the colored and transparent front shaft to change the coloring of the rear shaft and the coloring of the front shaft (for example, the rear shaft is blue). , Red axis, etc.),
Marks and pictures provided on the ballpoint pen refill are provided with any color, and marks and pictures are displayed or erased by positioning the mark or picture on the rear axis or front axis side according to the forward and backward movement of the ballpoint pen refill. Or, it can be changed.

[0032]

The present invention is as described above, and the ball-point pen refill rotates reliably in conjunction with the rotor every time a knock is made. However, the rotor rotates by a fixed angle, and as a result, writing is performed at several points at the tip of the tip. However, since the rotor is dispersed at several points instead of one point, uneven wear of the tip is unlikely to occur. . Therefore, in the case of a normal ball-point pen, it is possible to prevent the occurrence of blurring of a handwriting line or drawing phenomenon caused by ink leakage from the tip of the chip or uneven rotation of the ball. Also, if uneven wear occurs with respect to a normal ballpoint pen, the problem of writing spots and direct current of ink appears remarkably, and finally, writing becomes impossible due to pressure drop, and in severe cases, there is a problem that the tip ball falls off. The safety of the pressurized ballpoint pen is guaranteed. In addition, it is possible to provide a knock-type writing instrument rich in display and playability in cooperation with the mechanism for solving the above problem.

[Brief description of the drawings]

FIG. 1 is a longitudinal half sectional view showing the entirety of a knock type writing instrument according to an embodiment, and shows a state in which a tip end portion of a ballpoint pen projects from a tip end opening of a barrel.

FIG. 2 is an external view of a knock-type writing instrument according to an embodiment.

FIG. 3 is a half cross-sectional view showing, in an enlarged manner, a feeding mechanism of a knock-type writing instrument.

FIG. 4 is a partially non-sectional sectional view showing the entire ballpoint pen refill;

FIG. 5 is a sectional view of a main part showing another engagement means of the ballpoint pen refill and the rotor.

FIG. 6 is a view showing an example in which a sliding member is provided on a ballpoint pen refill.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Knock type writing implement 2 Shaft cylinder 3 Front shaft 3a Front part 3b Base 3c Grip 3d Fitting rib 3e Rib 4 Ring part 5 Ridge line 6 Ridge line 7 Rear shaft 7a Fitting groove 7b Inner step part 8 Inner cylinder 8a Cam groove 9 Rotor 9a Fitting hole 10 Knock rod 11 Knock portion 12 Knock spring 13 Clip 14 Return spring 15 Ball pen refill 16 Tip 17 Ink storage tube 17a Ink storage portion 17b Small diameter portion 17c Step portion 18 Float 19 Tail plug 20 Plug body 21 Ball pen refill 22 Ink storage tube 22a Stepped portion 22b Small diameter portion 23 Sliding member 24 Ballpoint pen refill 25 Tail plug 25a Shaft portion 26 Rotor 26a Fitting hole

Claims (5)

[Claims] 1. A ball-point pen refill containing ink for a writing instrument is slidably housed in a shaft cylinder by being urged rearward by a return spring, and the cam of the shaft cylinder itself or an inner cylinder provided in the shaft cylinder is provided. A knock rod having a cam and a rib and a rotor are fitted in the groove so as to be able to shift freely, and by pressing a knock part protruding from the rear end of the barrel, the tip end of the ball-point pen refill works in conjunction. In a knock-type writing instrument having a feeding mechanism that can be protruded and retracted from a tip end of a barrel, the ball-point refill is connected to the rotor, and the ball-point refill can rotate in conjunction with rotation of the rotor. A mark, a picture, or the like is provided on the outer peripheral surface of the ink containing section, and the barrel is opaque or substantially opaque, and the inside of the barrel is visible at a predetermined position in the axial direction in a transparent state. Site is provided that can be, knock-type writing instrument such as a mark or picture provided from the site on the ballpoint pen refill is characterized in that it is configured to be transparent. 2. A barrel having an opaque or substantially opaque rear shaft,
A knock-type writing instrument comprising an opaque or substantially opaque front shaft grip portion, and a transparent ring portion provided between the rear shaft and the front shaft. 3. A shaft extending from the outer periphery of the rear end of the ball-point pen refill or the rear end of a tail plug attached to the rear end of the ball-point pen refill is engaged with a fitting hole provided in front of the rotor. The knock-type writing instrument according to claim 1, wherein a locking portion is provided between the mating or the shaft portion and the fitting hole so as to be detachably engaged. 4. The knock-type writing instrument according to claim 1, wherein a sliding member is sandwiched between step portions of the ball-point pen refill with which the rear end of the return spring abuts, and the rear end of the return spring abuts the front end of the sliding member. . 5. A ball-point pen refill containing ink for a writing implement is slidably housed in a barrel by being urged rearward by a return spring, and the cam of the barrel itself or an inner barrel provided in the barrel is provided. A knock rod having a cam and a rib and a rotor are fitted in the groove so as to be able to shift freely, and by pressing a knock part protruding from the rear end of the barrel, the tip end of the ball-point pen refill works in conjunction. In a knock-type writing instrument having a feeding mechanism that can be protruded and retracted from a tip end of a barrel, the ball-point refill is connected to the rotor, and the ball-point refill can rotate in conjunction with rotation of the rotor. A knock-type writing instrument, wherein the rear end of the ink is provided to be pressurized.