WO2019026808A1

WO2019026808A1 - Pressurization type writing tool

Info

Publication number: WO2019026808A1
Application number: PCT/JP2018/028322
Authority: WO
Inventors: 裕右真田; 伸一瀬利
Original assignee: 株式会社パイロットコーポレーション
Priority date: 2017-07-31
Filing date: 2018-07-27
Publication date: 2019-02-07
Also published as: TW201919920A; JP7066718B2; CN110958946B; JPWO2019026808A1; CN110958946A; TWI735793B

Abstract

[Problem] To provide a pressurization type writing tool in which a writing pressure can be used to apply a pressure to an ink rear end inside an ink accommodation cylinder, wherein the pressurization inside the ink accommodation cylinder can be adjusted by rotating a rotation body to suit the needs of a user, and wherein, when the rotation body is rotated, the amount of protrusion of a front end of a ball-point pen refill protruding from the tip of a shaft cylinder can be kept constant. [Solution] A pressurization type writing tool (1) is provided with: a shaft cylinder (4) capable of accommodating a refill (8) filled with a writing tool ink composition (11); a pressurization mechanism (7) that applies a pressure to the writing tool ink composition (11) as the refill (8) retreats; and a pressurization force adjustment mechanism (24) that adjusts the pressure.

Description

Pressurized writing instrument

The present invention relates to a pressure-sensitive writing instrument that applies pressure to an ink composition for a writing instrument in an ink container.

Conventionally, as a pressure-type writing instrument of this type, as disclosed in, for example, JP 2000-335173 A, a pressing mechanism is provided at the rear end of the ink storage tube, and the pressure in the ink storage tube is A structure is known in which the ink discharge amount from the writing tip is increased by setting the pressure state, and the handwriting width and the handwriting density are improved.

However, in a pressure-type writing instrument such as JP2000-335173A, the pressure applied to the ink storage tube can not be changed after the pressure mechanism portion is operated, and therefore, the handwriting width or the handwriting width that suits the user's preference is not always required. There were times when it did not become the handwriting density.

As a technique for solving this problem, JPH08-141482A discloses an applicator which can arbitrarily adjust the pressure applied to the rear end of the correction liquid in the liquid tank.
In the applicator of JPH08-141482A, the pressing part of each stage is rotated stepwise from the pressing start point of the tank pressing part at the inner end of the barrel toward the pressing end point direction in the applicator at the rear end of the barrel The rear end of the liquid tank is pushed forward of the shaft cylinder according to the height of the liquid tank to compress the liquid tank in stages.

However, in the structure of JPH08-141482A, it is possible to pressurize the inside of the liquid tank with any strength at the time of use, but at the time of use, it is necessary to adjust the pressing force by rotating the rotating body. Even when the use is stopped, there is a risk of causing a liquid leakage from the liquid application port if pressure is applied, so it is necessary to rotate the rotating body to the original position before storing it, which takes time and effort.

On the other hand, JP2011-235612A discloses a so-called pen pressure type ballpoint pen which operates a pressurizing mechanism with writing pressure at the time of writing to make the inside of a writing liquid storage pipe pressurized.
This writing pressure type ballpoint pen described in JP2011-235612A has a structure in which the pressing mechanism is activated and pressure is applied to the rear end of the ink when the ballpoint pen refill retracts by writing pressure at the time of writing. As in the case of 141482A, in order to adjust the pressure applied to the ink rear end at the time of pressure application, it is necessary to increase or decrease the width at which the ballpoint pen refill retracts when the pen pressure is applied. It was difficult to make the length at which the front end portion of the head projects out constant.
Although the gripping position of the ballpoint pen varies depending on the person, the gripping position is often determined on the basis of the position of the pen tip at the time of writing. For this reason, the user must change the holding position of the barrel in accordance with the protruding length of the pen point, and in particular, the inward or outward direction so as to make the holding portion of the writing tool uneven for slippage or easy to hold. In the case where it is formed to be curved toward the direction, there is a problem that when the gripping position is changed, even the gripping feeling is changed.

JP 2009-202513 A pressure type writing instrument comprises a cylinder having an air hole communicating with the inside and outside at the rear end, and a sealing member consisting of a bottomed cylinder mounted on the inner wall of the knock body By advancing the body, the rear end of the cylinder is pressed against the bottomed inner wall of the sealing member to close the air hole of the cylinder, and by advancing the cylinder, the air in the sealed cylinder is compressed to The pressure is applied to the space at the rear end of the

In addition, in general, in the case of a pressure-sensitive writing instrument, it is necessary to restore the amount of compression of the sealed space when releasing the pressurized state. For this reason, when releasing the pressurized space, if the pressure of the pressurized space has reached near the atmospheric pressure due to the consumption of ink etc., it will be a negative pressure state where the atmospheric pressure is lower than the atmospheric pressure, and the ink storage cylinder The ink for writing instrument filled in the inside moves to the rear end side of the ink storage cylinder, and there is a possibility that the ink backflow occurs. As a countermeasure against this, in the pressure type writing instrument of JP2009-202513A, when the knocking body is biased rearward by the coil spring and the pressure state of the pressure mechanism is released, the cylinder and sealing member are sealed by the biasing force of the coil spring. After releasing the air hole of the cylinder and making the inside of the cylinder and the rear end of the ink storage cylinder the same pressure as the atmospheric pressure, the cylinder retracts to release the sealed space. Has a structure to prevent a low negative pressure state.

In the above-described JP2011-235612A, the pressure and pressure type ballpoint pen is capable of applying pressure to the rear end of the ink by activating the pressure mechanism when the ballpoint pen refill is retracted by the pen pressure at the time of writing. At the same time, the writing tip portion is in contact with and separated from the paper surface etc. to switch between the pressurized state and the non-pressurized state. For this reason, if the ballpoint pen refill greatly retreats at the time of writing, it becomes very difficult to write, so it is necessary to minimize the amount of retraction of the ballpoint refill at the time of writing. Therefore, high pressure can not be applied to the pressurizing chamber by advancing the knocking body by a long stroke as in the case of a knock-type pressure-sensitive writing instrument such as JP2009-202513A, so the pressure applied by the pressure mechanism is also knocked It becomes smaller than the formula. And, because the pressure state of the pressure chamber is reset every time the writing tip moves away from the paper surface in the pen pressure pressure type, the pressure that can be applied by one compression is low, but the pressure is substantially constant. It has the advantage of being able to write while keeping the state.

However, in the structure of JP2011-235612A, the pressure state of the pressure chamber is reset every writing, and the pressure applied in one operation is also reduced, so the negative pressure state generated at the time of pressure reset is also It becomes extremely small, but compared with a knock-type pressure-sensitive writing instrument like JP2009-202513A, the number of times the pressure state is reset at the time of writing is overwhelmingly many, so air from the writing tip is refilled with a ballpoint pen refill It is easy to be caught in the inside, and eventually there is a risk that the ink will flow back to make it impossible to write.

The present invention has been made in view of the above problems, and in a pressure-sensitive writing tool capable of applying pressure to the ink rear end in the ink storage cylinder by writing pressure, the ink storage cylinder is realized by rotating a rotating body. A pressure-sensitive writing tool capable of adjusting the pressure according to the user's preference and adjusting the amount of protrusion of the front end of the ballpoint pen refill that protrudes from the tip of the barrel when the rotating body is turned. The first objective is to provide

The present invention also relates to a pressure-sensitive writing tool capable of applying pressure to the ink rear end in the ink storage cylinder by writing pressure, wherein the writing front end portion is separated from the writing surface at the time of writing and a pressure state applied to the rear end A second object of the present invention is to provide a pressure-sensitive writing instrument capable of preventing a negative pressure state in which the pressure in the pressure chamber becomes lower than the atmospheric pressure when the pressure chamber is released, and preventing backflow of ink.

The pressure-type writing instrument of the present invention is
An axial cylinder capable of internally accommodating a refill filled with the ink composition for writing instrument;
A pressure mechanism that applies pressure to the ink composition for writing instruments as the refill moves backward;
And a pressure adjustment mechanism for adjusting the pressure.

In the pressure-type writing instrument of the present invention,
It further comprises a rotating body provided to protrude from the rear end of the shaft cylinder,
The pressure adjustment mechanism may adjust the pressure by rotating the rotating body.

The pressure-type writing instrument of the present invention is
A ballpoint pen refill comprising an ink storage cylinder filled with the ink composition for writing tool and a ballpoint pen tip in the front portion of the ink storage cylinder in a shaft cylinder,
The pressure-sensitive writing instrument is a pressing mechanism provided with a pressing mechanism for applying pressure to the rear end of the ink composition for writing instruments, wherein the writing pressure is applied to the rear of the ball-point pen refills to retract the ballpoint refills.
A rotating body protruding from the rear end of the shaft cylinder and a pressing force adjusting mechanism that operates by rotating the rotating body to adjust the amount of retraction of the ballpoint pen refill are provided behind the pressing mechanism. The pressing mechanism is locked to the shaft cylinder so as to be unrotatable and movable back and forth,
The rotating body is rotatably engaged with the shaft cylinder,
The pressure adjustment mechanism operates by rotating the rotating body, and adjusts the pressure applied to the rear end of the ink composition for writing tool in the ink storage cylinder, and before and after rotating the rotating body, The relative position of the ballpoint pen refill to the shaft cylinder in the axial direction is configured not to change.

In the pressure-type writing instrument of the present invention,
Inside the shaft cylinder, a slide member which is non-rotatably and rotatably engaged with the shaft cylinder is disposed.
The slide member includes the pressing mechanism disposed inward of the slide member, and the rotating body disposed such that a portion thereof protrudes rearward from the rear end opening of the slide member. And
The front end portion of the ballpoint pen refill may be configured to project from the front end opening of the barrel by pressing the rotating body forward.

In the pressure-type writing instrument of the present invention,
The pressing force adjusting mechanism includes the slide member, the rotating body inserted from the front end opening of the slide member and rotatably and longitudinally movably engaged with the slide member, and the inside of the rotating body And a sliding member rotatably and longitudinally movably engaged with the rotating body.
A first cam mechanism for moving the rotating body back and forth with respect to the sliding member between the slide member and the rotating body, and between the rotating body and the sliding member with respect to the rotating body And a second cam mechanism for moving the sliding member back and forth.

In the pressure-type writing instrument of the present invention,
The first cam mechanism is in sliding contact with the inner surface of the slide member with a first cam slope inclined with respect to the axial direction and extending in the axial direction, and with the outer surface of the rotating body with the first cam slope. And the first cam projection formed,
The second cam mechanism slides on an outer surface of the sliding member, a second cam slope inclined with respect to the axial direction and extending in an axial direction, and an inner surface of the rotating body with the second cam slope. And a second cam protrusion formed to be in contact with each other.

In the pressure-type writing instrument of the present invention,
The pressure mechanism includes: a cylindrical body having a through hole penetrating in the front and back direction; an elastic member disposed inside the cylindrical body; and an elastic member on which a rear end portion of the ballpoint pen refill is detachably mounted; A pressure chamber formed between the inner wall of the member and the rear end of the ink storage cylinder and in communication with the rear end opening of the ink storage cylinder; and the inner side of the cylindrical body and the rear of the elastic member A stop provided and an air hole communicating the pressure chamber with the outside,
The cylindrical body is non-rotatably and rotatably engaged with the slide member, and the slide member is engaged with the cylindrical body so as to be movable back and forth.
By arranging a resilient member between the rear inner step of the cylindrical body and the front inner step of the sliding member, the cylindrical body is resiliently forwardly moved relative to the sliding member,
The elastic member and the stopper come in contact with each other to deform the elastic member by retracting the cylindrical body together with the ballpoint pen refill, so that the pressure chamber is compressed and the ink in the ink storage cylinder is removed. Pressure may be applied to the ends.

According to the present invention, in the pressure type writing tool capable of applying pressure to the ink rear end in the ink storage cylinder by writing pressure, the inside of the ink storage cylinder is added according to the user's preference by rotating the rotating body. It is possible to provide a pressure-sensitive writing instrument capable of adjusting the pressure and maintaining the amount of protrusion of the front end of the ballpoint pen refill protruding from the tip of the barrel when the rotating body is rotated.

The pressure-type writing instrument of the present invention is
A ballpoint pen refill comprising an ink storage cylinder filled with the ink composition for writing tool and a ballpoint pen tip in the front portion of the ink storage cylinder in a shaft cylinder,
The pressure-sensitive writing instrument is a pressing mechanism provided with a pressing mechanism for applying pressure to the rear end of the ink composition for writing instruments, wherein the writing pressure is applied to the rear of the ball-point pen refills to retract the ballpoint refills.
The pressurizing mechanism includes a cylinder formed in a cylindrical shape, an airtight valve having an airtight deformation portion on an outer peripheral surface and capable of moving back and forth relative to the cylinder, and back and forth movement in a rear inner hole of the cylinder A piston freely mounted, an airtight member disposed between the piston and the cylinder, the cylinder, the airtight valve, the piston, and the airtight member are surrounded and communicated with the rear portion of the ball pen refill A pressure chamber, and a resilient member disposed between the gas tight valve and the piston and springing the gas tight valve forward.
When writing pressure is applied to the front end of the ballpoint pen tip, the ballpoint pen refill retracts, and the cylinder and the airtight valve are engaged with the retraction of the ballpoint pen refill against the elastic force of the resilient member and the piston , And after closing the pressurizing chamber, it is compressed and pressurized, and when the writing pressure on the ballpoint pen refill is released, the airtight valve advances relative to the piston prior to the cylinder. As a result, an air passage communicating the pressurizing chamber with the outside is formed, the airtight state of the pressurizing chamber is released and the pressure becomes the same as the atmospheric pressure, and then the cylinder advances with a delay.

In the pressure-type writing instrument of the present invention,
When a pressure is applied to the front end of the ballpoint pen refill, the pressure-sensitive deformation portion of the gastight valve abuts on the contact portion of the cylinder so that the pressurizing chamber becomes airtight. When the writing pressure on the refill is released, the sealing member generates the fitting force generated between the sealing valve and the contact portion of the cylinder by the sealing deformation portion of the sealing valve and the piston and the cylinder The air tight valve may be configured to be advanced relative to the piston prior to the cylinder by increasing the fitting force generated therebetween.

According to the present invention, in a pressure-sensitive writing tool capable of applying pressure to the ink rear end in the ink storage cylinder by writing pressure, the tip end of the ballpoint pen tip is separated from the writing surface to apply pressure on the ink rear end. It is possible to provide a pressure-sensitive writing instrument capable of preventing a negative pressure state in which the pressure in the pressure chamber becomes lower than the atmospheric pressure when the pressure chamber is released, and preventing the backflow of ink.

In the pressure-type writing instrument of the present invention,
You may further provide the pressurization force adjustment mechanism which adjusts the said pressure.

In the pressure-type writing instrument of the present invention,
The ink composition for a writing instrument is a thermochromic ink,
A friction body provided at the rear end of the rotating body, capable of rubbing the handwriting of the thermochromic ink and causing the handwriting to discolor by the frictional heat generated at that time;
A stopper member that allows rotation of the rotating body in a state in which the rear end of the shaft cylinder is directed upward, and prevents rotation of the rotating body in a state in which the rear end of the shaft cylinder is directed downward; You may provide further.

FIG. 1 is a longitudinal sectional view of the pressure-sensitive writing instrument of the first embodiment. FIG. 2 is an enlarged vertical cross-sectional view in which the main part of FIG. 1 is enlarged. FIG. 3 is an exploded view for explaining the pressing mechanism and the pressing force adjusting mechanism of the first embodiment. FIG. 4 is an enlarged cross-sectional view taken along line IV-IV in FIG. FIG. 5 is an enlarged cross-sectional view taken along the line VV in FIG. 6 is a longitudinal sectional view showing a knocking state in which the rotating body is pressed from the state of FIG. FIG. 7 is an explanatory view showing a state when writing with the pressure type writing instrument of FIG. FIG. 8 is an explanatory view showing a state in which the writing pressure is applied along the axial center from the state of FIG. FIG. 9A is an explanatory view showing the operation of the pressure-sensitive writing instrument when a pen pressure is applied, and shows a state before the pen pressure is applied. FIG. 9B is an explanatory view showing the operation of the pressure-sensitive writing instrument when a writing pressure is applied, and shows a state in which the pressing space is airtight by applying the writing pressure. FIG. 9C is an explanatory view showing the operation of the pressure-sensitive writing instrument when a writing pressure is applied, and shows a state where the applying pressure is applied by applying the writing pressure. FIG. 10A is an explanatory view showing an operation when the rotary body of the pressure-sensitive writing tool is rotated, and shows a state in which the pressing force is set high. FIG. 10B is an explanatory view showing an operation when the rotary body of the pressure-sensitive writing tool is rotated, and shows a state in which the pressure is set low. FIG. 10C is an explanatory view showing an operation when the rotary body of the pressure-sensitive writing tool is rotated, and shows a state in which the pressing force is not applied. FIG. 11A is an explanatory view for explaining the fitted state of the cam of the first pressing mechanism when rotating the rotary body of the pressurized writing tool, and the fitted state of the cam in the pressurized writing tool shown in FIG. 10A Is shown. FIG. 11B is an explanatory view for explaining the fitting state of the cam of the first pressing mechanism when rotating the rotary body of the pressing tool, and the fitting state of the cam in the pressing tool shown in FIG. 10B. Is shown. FIG. 11C is an explanatory view for explaining the fitting state of the cam of the first pressing mechanism when rotating the rotary body of the pressing tool, and the fitting state of the cam in the pressing tool shown in FIG. 10C. Is shown. FIG. 12A is an explanatory view for explaining the fitted state of the cam of the second pressing mechanism when rotating the rotary body of the pressurized writing tool, and the fitted state of the cam in the pressurized writing tool shown in FIG. 10A Is shown. FIG. 12B is an explanatory view for explaining the fitted state of the cam of the second pressing mechanism when rotating the rotary body of the pressurized writing tool, wherein the fitted state of the cam in the pressurized writing tool shown in FIG. 10B Is shown. FIG. 12C is an explanatory view for explaining the fitted state of the cam of the second pressing mechanism when rotating the rotary body of the pressurized writing tool, and the fitted state of the cam in the pressurized writing tool shown in FIG. 10C Is shown. FIG. 13 is a side view showing a modified example of the pressure-sensitive writing instrument of the first embodiment. FIG. 14 is an external view of a pressure-sensitive writing instrument according to a second embodiment. FIG. 15 is a longitudinal sectional view of the pressure-sensitive writing instrument according to the second embodiment. FIG. 16 is an enlarged vertical cross-sectional view in which the essential parts of FIG. 15 are enlarged. FIG. 17 is an exploded view for explaining the pressing mechanism and the pressing force adjusting mechanism of the second embodiment. FIG. 18 is an enlarged sectional view taken along line XVIII-XVIII in FIG. FIG. 19 is an enlarged sectional view taken along line XIX-XIX in FIG. FIG. 20 is a longitudinal sectional view showing a knocking state in which the rotating body is pressed from the state of FIG. FIG. 21 is an explanatory view showing a state when writing with the pressure type writing instrument of FIG. FIG. 22 is an explanatory view showing a state where a writing pressure is applied along the axis from the state of FIG. FIG. 23 is an enlarged vertical cross-sectional view in which the essential parts of FIG. 21 are enlarged. FIG. 24 is an enlarged vertical sectional view showing a state where a pen pressure is applied from the state of FIG. FIG. 25 is an enlarged vertical sectional view showing a state where the pen pressure is applied to the end from the state of FIG. FIG. 26 is an enlarged vertical sectional view showing a state in which the writing pressure is released from the state of FIG. 25 and an air passage is formed. FIG. 27A is an explanatory view showing an operation at the time of rotating a rotary body of a pressure-sensitive writing tool in the second embodiment, and shows a state in which a pressing force is set high. FIG. 27B is an explanatory view showing an operation at the time of rotating a rotary body of the pressure-sensitive writing tool in the second embodiment, and shows a state in which a pressing force is set low. FIG. 27C is an explanatory view showing an operation at the time of rotating a rotary body of the pressure-sensitive writing tool in the second embodiment, and shows a state where pressure is not applied. FIG. 28A is an explanatory view for explaining a fitted state of the cam of the first cam mechanism when rotating the rotary body of the pressure-sensitive writing tool in the second embodiment, and the cam in the pressure-sensitive writing tool shown in FIG. 27A Shows the fitted state of. FIG. 28B is an explanatory view for explaining a fitting state of the cam of the first cam mechanism when the rotary body of the pressure-sensitive writing tool is rotated in the second embodiment, and the cam in the pressure-sensitive writing tool shown in FIG. Shows the fitted state of. FIG. 28C is an explanatory view for explaining a fitted state of the cam of the first cam mechanism when the rotary body of the pressure-sensitive writing tool is rotated in the second embodiment, and the cam in the pressure-sensitive writing tool shown in FIG. Shows the fitted state of. FIG. 29A is an explanatory view for explaining a fitted state of the cam of the second cam mechanism when the rotary body of the pressure-sensitive writing tool is rotated in the second embodiment, and the cam in the pressure-sensitive writing tool shown in FIG. Shows the fitted state of. FIG. 29B is an explanatory view for explaining a fitted state of the cam of the second cam mechanism when the rotary body of the pressure-sensitive writing tool is rotated in the second embodiment, and the cam in the pressure-sensitive writing tool shown in FIG. Shows the fitted state of. FIG. 29C is an explanatory view for explaining a fitting state of the cam of the second cam mechanism when the rotary body of the pressure-sensitive writing tool is rotated in the second embodiment, and the cam in the pressure-sensitive writing tool shown in FIG. Shows the fitted state of. FIG. 30 is a partial longitudinal sectional view showing a modification of the pressure-sensitive writing instrument according to the second embodiment. 31 is a view showing the pressure-sensitive writing instrument in a cross section corresponding to a line XXXI-XXXI in FIG. FIG. 32 is an exploded view showing components constituting the pressing mechanism and the pressing force adjusting mechanism of the pressure-sensitive writing instrument of FIG. FIG. 33 is a longitudinal cross-sectional view showing the rotating body of FIG. 30 in an enlarged manner. FIG. 34 is a figure for demonstrating the method to erase a handwriting using the pressurization type writing instrument of FIG. FIG. 35 is a view showing the pressure-sensitive writing instrument in a cross section corresponding to a line XXXV-XXXV in FIG.

Next, the pressure-sensitive writing instrument of the present invention will be described in detail with reference to the drawings, but the present invention is not limited to the following embodiments and modifications.
Further, in the present specification, in the longitudinal direction of the barrel, the side with the ballpoint pen tip is expressed as the front, and the opposite side is expressed as the rear. Along with this, the direction along the longitudinal direction of the shaft cylinder may be expressed as the front-rear direction. In addition, movement in the front and back direction may be expressed as back and forth movement. Furthermore, in the axial direction of the shaft cylinder, the direction in which the ballpoint pen refill is present is expressed as inward, and the opposite side is expressed as outward.
In order to make the description easy to understand, similar members in the drawings and similar portions are denoted by the same reference numerals.

First Embodiment
The pressure-sensitive writing instrument 1 of the present embodiment includes a barrel 4, a pressure mechanism 7, and a pressure adjustment mechanism 24. The barrel 4 is configured to be able to accommodate therein the refill 8 filled with the ink 11 that is an ink composition for writing instruments. The pressure mechanism 7 is a mechanism that applies pressure to the ink 11. The pressure type writing instrument 1 has a writing state in which the front end of the refill 8 protrudes from the front end opening 3a of the barrel 4 and a non-writing state in which the front end of the refill 8 is sunk from the front opening 3a of the barrel 4 It is configured to be switchable. In the pressure-type writing instrument 1 shown in FIGS. 1 to 5, the shaft cylinder 4 is formed by screwing the front shaft 3 in front of the rear shaft 2, and is disposed in the shaft cylinder 4 so as to be movable back and forth. The slide member 5, the rotary member 6 rotatably engaged with the slide member 5, the pressure mechanism 7 disposed in the slide member 5, and the pressure mechanism 7 And a clip 9 pivotally engaged with the side surface of the rear shaft 2.

The ballpoint pen refill 8 includes an ink 11 which is an ink composition for a writing tool and a grease-like ink follower 12 which follows the rear end of the ink 11 in a transparent ink container 10 made of PP resin. The rear end portion of the ballpoint pen tip 13 which directly accommodates and holds the ball (φ 0.38 mm) rotatably in the front end opening portion of the ink storage cylinder 10 is press-fit fitted, and the rear end opening portion of the ink storage cylinder 10 Obtained by press fitting the cylindrical tail plug 14 into the
The tail plug 14 is formed with a through hole penetrating in the front-rear direction inside and a stepped portion at the rear to form a mounting portion 14 a.

As shown in FIG. 1, the front shaft 3 (shaft cylinder 4) is formed at its front end with a front end opening 3a through which the ballpoint pen tip 13 of the ballpoint pen refill 8 can project. In addition, an inner step 3b is formed on the rear inner circumferential surface.

The rear shaft 2 (shaft cylinder 4) is formed in a tubular shape, and as shown in FIG. 2, a side hole 2b extending in the axial direction in the outer side surface 2a and penetrating to the inner hole is formed. Further, a clip engaging portion 2c which protrudes outward is formed on the outer side surface 2a, and the clip engaging portion 2c is constituted by a clip engaging projection 2d and a spring engaging projection 2e. A locking hole 2f is formed in the clip locking projection 2d in a direction perpendicular to the axial direction.
Further, on the rear inner peripheral surface of the rear shaft 2, a locking rail portion 2g which protrudes inward and extends in the front and rear direction is formed.

As shown in FIG. 2 to FIG. 4, the slide member 5 is formed with a hooking portion 5 a that protrudes outward at the outer peripheral portion, and the hooking portion 5 a is disposed in the side hole 2 b of the rear shaft 2. It is In addition, a locking groove 5d extending in the axial direction is formed on the rear outer side surface of the slide member 5, and by mounting the locking groove 5d in the locking rail portion 2g of the rear shaft 2, the rear shaft 2 The slide member 5 is locked so as to be slidable back and forth and non-rotatable.
Furthermore, in the front inner bore of the slide member 5, there is formed a projection-like front inner projection 5b projecting inward, and at the rear of the slide member 5, an inner step 5c having a small inner diameter is formed. It is formed.

Further, on the side surface of the slide member 5, slit portions 5e extending rearward from the front end are formed, and the slit portions 5e are formed in two places symmetrically with respect to the axial center. Furthermore, on the inner surface of the slide member 5, there is formed a first cam slope 5f which is formed to be inclined along the axial circumferential direction and protrudes inward, and a plurality of first cam slopes 5f are formed. A step 5g is formed. The plurality of step portions 5g respectively have recessed portions 5h formed in a concave shape toward the rear.

A tubular spacer ring 15 is disposed in front of the slide member 5, and a rear portion 15 a is formed at the rear of the spacer ring 15. Further, the spacer ring 15 is attached to the slide member 5 in a non-detachable manner by pressing the front inner protrusion 5b of the slide member 5 into the rear stage portion 15a.
Furthermore, as shown in FIG. 1, the knocking coil spring 16 is stretched in a compressed state between the inner step 3b formed on the inner surface of the front shaft 3 (shaft cylinder 4) and the front end 15b of the spacer ring 15. Thus, the slide member 5 is sprung back from the front shaft 3 (shaft cylinder 4) via the spacer ring 15.

As shown in FIGS. 1, 2, 4 and 5, the clip 9 is formed on the spring locking projection 2 e of the rear shaft 2 and on the inner wall of the clip 9 so as to protrude toward the barrel 4. The clip spring 17 is disposed between the projection 9 a and the lock shaft portion 9 b formed on the inner side wall of the clip 9 is locked to the lock hole 2 f, so that the tip of the clip 9 can be It is stretched over the outer wall side of the wall so as to be constantly bouncing. Further, by pressing the rear end of the clip 9 (in the direction of arrow G in FIG. 2), the locking axis R between the clip 9 and the rear shaft 2 is used as a fulcrum, and the tip of the clip 9 is the outer wall surface of the rear shaft 2 As a movable clip that can be separated from the
In the front portion of the clip 9, a hooked portion 9c extending from the base portion 9d to the shaft cylinder 4 side and a hooked portion 5a formed on the side surface of the slide member 5 is formed.

The pressure mechanism 7 is a mechanism that applies pressure to the ink 11 as the refill 8 moves backward. As shown in FIGS. 1 to 3, the pressing mechanism 7 is accommodated in the rear of the ballpoint pen refill 8 and inward of the slide member 5 so as to be movable back and forth relative to the slide member 5, and is formed in a cylindrical shape. The cylindrical body 18, the stopper 19 mounted for free movement back and forth with respect to the cylindrical body 18, and the inner peripheral portion of the cylindrical body 18 are press-fit mounted, and detachable at the rear end of the ballpoint pen refill 8 And a pressure space (pressure chamber) 21 formed inside the elastic member 20 and in communication with the rear inner hole 8a of the ballpoint pen refill 8.
Further, the pressure mechanism 7 is configured such that the forward movement of the pressure mechanism 7 is restricted by the front end of the cylindrical body 18 abutting on the rear end of the spacer ring 15.

More specifically, as shown in FIGS. 2 and 3, the cylindrical body 18 is provided with a through hole 18 a which is penetrated back and forth and is provided with a plurality of stepped portions, and the outer peripheral portion is outward A locking projection 18b is formed to project toward the end. Further, the cylindrical body 18 has an outer stepped portion 18c formed on the outer peripheral portion, and the outer diameter of the rear portion is smaller than that of the front portion.
Furthermore, at the rear end portion of the cylindrical body 18, rear end convex portions 18d that project toward the rear side are formed at two places with the axial center in between.
Incidentally, as shown in FIG. 5, the locking projection 18b of the cylindrical body 18 is inserted into the slit portion 5e formed on the side surface of the slide member 5, whereby the cylindrical body 18 is rotated relative to the slide member 5. It is locked immovably and back and forth freely movable.

More specifically, as shown in FIG. 1 to FIG. 3 and FIG. 5, the stopper 19 is formed with a hook 19a at the front end and protrudes outward at the rear end. Two locking portions 19b are formed. In addition, a slit 19c extending forward from the rear end is formed between the two locking portions 19b.
In addition, when attaching the stopper 19 to the cylindrical body 18, the collar 19 a abuts on the inner step formed in the through hole 18 a of the cylindrical body 18 to restrict the backward movement, and further, the stopper A plurality of groove-shaped air passages 19e extending in the axial direction are equally disposed along the axial direction on the side surface of 19 and the through holes 18a of the through hole 18a of the cylindrical body 18 are formed by the air passages 19e. 18f and the rear hole 18g are configured to be kept ventilated at all times.

If it explains in full detail about elastic member 20, as shown in Drawing 2 and Drawing 3, elastic member 20 is formed with nitrile rubber, and elastic member 20 is provided with inner hole 20a penetrated back and forth.
Further, the elastic member 20 is press-fit fitted to the front inner surface 18h of the through hole 18a of the cylindrical body 18, and the mounting portion 14a of the tail plug 14 of the ball pen refill 8 on the front inner peripheral portion 20b of the inner hole 20a. Is detachably attached.
When the elastic member 20 is press-fit to the front inner surface 18 h, a gap is formed between the rear end of the elastic member 20 and the front end face 19 d of the stopper 19. The gap is maintained except when the pen pressure is applied.

Further, the above-described pressure space (pressure chamber) 21 is formed inside the elastic member 20, and the pressure space 21 is in communication with the rear inner hole 8 a of the ballpoint pen refill 8.
The pressurizing space 21 is communicated with the hollow hole 18f of the cylindrical body 18 by an air hole 20c formed at the rear of the inner hole 20a, and the hollow hole 18f is communicated with the outside through the rear hole 18g by an air passage 19e. Because the pressure space 21 is communicated with the outside.

A sliding member 22 is disposed behind the cylindrical body 18, and a second cam slope 22a is formed on the side surface of the sliding member 22. Further, a plurality of stepped portions 22b are formed on the second cam slope 22a, and recessed portions 22c formed in a concave shape toward the front are respectively formed on the plurality of stepped portions 22b.
Furthermore, the front end of the slide member 22 is notched in the form of a slit toward the rear, and a front end recess 22d is formed at two places with the axial center in between, and the rear end protrusion of the cylindrical body 18 is formed. By inserting 18 d into the front end concave portion 22 d of the sliding member 22, the sliding member 22 is engaged with the cylindrical body 18 so as to be movable back and forth and non-rotatably.

Further, the stopper 19 is inserted from the front direction into the inner hole of the sliding member 22 and the locking portion 19 b of the stopper 19 is protruded rearward from the rear end of the sliding member 22 and locked. The stopper 19 and the sliding member 22 are non-removably fixed.
When the stopper 19 is inserted into the slide member 22, the two locking portions 19 b are bent by the slits 19 c to be close to the axial center side, so that the stopper 19 can be easily inserted into the inner hole.

A pressurizing coil spring 23 is stretched between the rear inner step 18 e of the cylindrical body 18 and the front inner step 22 e of the sliding member 22, and the sliding member 22 is moved by the pressurizing coil spring 23. Against the front end of the cylindrical body 18.

Here, as shown in FIG. 2, the rotating body 6 described above is inserted into the inside of the slide member 5 from the front end opening of the slide member 5, and a part thereof protrudes backward from the rear opening of the slide member 5. It is attached like.
Further, as shown in FIG. 3, the rotary body 6 is formed with a plurality of groove portions 6 a along the axial center on the rear outer peripheral surface, and makes it difficult to slip when the rotary body 6 is grasped with fingers by the groove portions 6 a It is
Further, a convex portion 6b is formed in the front of the groove portion 6a so as to protrude outward and incline so that the outer diameter becomes larger from the rear to the front, and when the rotating body 6 is mounted on the slide member 5 The projecting portion 6 b is configured to prevent the rotating body 6 from coming off the slide member 5.

Further, the pivoting body 6 is formed with a first cam projection 6d so as to extend rearward from the front outer peripheral surface 6c, and a second cam projection 6f formed so as to extend forward from the rear inner peripheral surface 6e. And have been formed.
A first cam mechanism 30 is configured by the first cam projection 6 d of the rotary body 6 and the first cam slope 5 f of the slide member 5 being cam-fitted, and a second cam projection of the rotary body 6 is formed. The second cam mechanism 40 is configured by the cam fitting of the second cam slope 22 a of the sliding member 22 with the second cam slope 22 a of the sliding member 22.

Here, the pressing force adjusting mechanism 24 can change the pressure at which the pressing space 21 is compressed and pressed by rotating the rotating body 6 with the slide member 5, the rotating body 6 and the sliding member 22. Is configured.

Next, a state will be described in which the ballpoint pen tip 13 which is the writing tip of the ballpoint pen refill 8 is made to protrude and retract from the front end opening 3a of the front shaft 3 by pressing the rotating body 6 forward (knocking operation).
When the rotary body 6 is pressed forward (in the direction of arrow F in FIG. 1) from the state of FIG. 1, the rotary body 6 advances with respect to the slide member 5 and the convex portion 6b abuts on the rear end of the slide member 5; The slide member 5 pressed by the rotating body 6 and the spacer ring 15 press-fit mounted on the slide member 5 move forward together with the rotating body 6 against the elastic force of the knocking coil spring 16. At the same time, the rotary member 6 is cam-fit with the slide member 22, so the slide member 22 is pushed forward and the slide member 22 advances to be resiliently urged by the coil spring 23 for pressurization, thereby forming a cylindrical shape. The body 18 moves forward. Then, along with the forward movement of the cylindrical body 18, the ballpoint pen refill 8 is pushed forward through the elastic member 20 and advances, and the front end portion of the ballpoint pen tip 13 projects from the front end opening 3a of the front shaft 3. At that time, the hook portion 5a of the slide member 5 is hooked to the hooked portion 9c of the tip end portion of the clip 9 disposed on the side surface of the rear shaft 2 so that the front end of the ballpoint pen tip 13 It will be in the state of FIG. 6 which maintains the state protruded from the front end opening part 3a of axial cylinder 4).

Here, when the rear end portion of the clip 9 is pressed (in the direction of arrow G in FIG. 6) and the hooking portion 5a of the slide member 5 hooked to the hooking portion 9c of the clip 9 is released, knocking occurs. The resilient force of the coil spring 16 causes the ballpoint pen refill 8, the pressing mechanism 7, the sliding member 22, the sliding member 5 and the rotating body 6 to move rearward and return to the state of FIG.

Next, in the present embodiment, a state in which pressure is applied to the rear end of the ink 11 in the ballpoint pen refill 8 via the ink follower 12 by the writing pressure at the time of writing will be described.
As shown in FIGS. 6 and 9A, with the front end of the ballpoint pen tip 13 protruding from the front end opening 3a of the front shaft 3, as shown in FIG. When the ballpoint pen refill 8 is retracted in the direction of arrow H in FIG. 7, the slide member 5 can not be retracted because the hooking portion is engaged with the hooked portion 9c of the clip 9, and the pivoting member 6 Can not retract because it is cam-fitted to the slide member 5, and furthermore, since the slide member 22 can not retract because it is cam-fitted to the rotating body 6, the elastic force of the pressure coil spring 23 The tubular body 18 retracts with the elastic member 20 against the pressure. Then, when the rear end of the elastic member 20 abuts on the front end face 19d of the stopper 19 locked and stopped by the sliding member 22, the air hole 20c is closed by the front end face 19d and the pressurizing space 21 is It will be in the state of FIG. 9B sealed. Furthermore, when the ballpoint pen refill 8 is retracted and the cylindrical body 18 is retracted, the pressure space 21 is compressed as shown in FIG. 9C by the elastic deformation of the elastic member 20 and the back end of the ink 11 in the ballpoint refill 8. It will be in the state of FIG. 8 to which a pressure is applied via the ink follower 12. That is, as the ball point pen refill 8 retreats, pressure is applied to the rear end of the ink 11 by the pressure mechanism 7.
The backward movement of the ballpoint pen refill 8 in the direction of the arrow H due to the writing pressure of the ballpoint pen refill 8 is stopped when the outer step 18c of the cylindrical body 18 abuts on the front end 6g of the rotating body 6. That is, the length by which the ballpoint pen refill 8 can be retracted can be determined by the size of the gap between the outer step 18c and the front end 6g.

When the writing pressure is released, the cylindrical body 18 and the elastic member 20 move forward (original position) by the elastic force of the pressing coil spring 23 and the restoring force of the deformed elastic member 20. Then, when the rear end of the elastic member 20 separates from the front end face 19d of the stopper 19, the air hole 20c is opened to release the sealing of the pressurizing space 21 and the rear inner hole 8c of the ballpoint pen refill 8 It becomes the same pressure and returns to the state of FIG.

Next, in the knocking state shown in FIG. 6, an operation of adjusting the pressure applied to the ink 11 by operating the pressure adjustment mechanism 24 by rotating the rotating body 6 with respect to the rear shaft 2 will be described.
When the pivoting member 6 is viewed from the rear end side and rotated leftward (counterclockwise) from the state of FIG. 10A to the state of FIG. 10B, the slide member 5 is locked to the rear shaft 2 so as not to pivot. Because of this, as shown in FIG. 11A to FIG. 11B, the first cam projection 6d of the rotating body 6 moves from the first step 5g1 to the adjacent second step 5g2 along the first cam slope. At this time, the rotary member 6 is advanced with respect to the slide member 5 by L1 minute movement of the first cam projection 6d (see FIG. 11A), and at the same time, the slide springed backward by the pressure coil spring 23. The moving member also advances L1 minutes.
And since the sliding member 22 is non-rotatably locked to the cylindrical body 18 and the cylindrical body 18 is non-rotatably locked to the slide member 5, the sliding member 22 is an axial cylinder 4A and 4B, the second cam projection 6f of the rotating body 6 is moved to the second cam slope 22a of the sliding member 22 as shown in FIGS. 12A to 12B as the rotating body 6 rotates. It moves from the first step 22b1 to the adjacent second step 22b2. At this time, the sliding member 22 retracts with respect to the rotating body 6 for M1 (see FIG. 12A) in which the second cam projection 6f has moved one step. Therefore, the sliding member 22 is advanced by L 1 by the first cam mechanism 30 and is retracted by M 1 by the second cam mechanism 40. And in this embodiment, since it is constituted so that it may be set to L1 = M1, only rotation object 6 is advanced with respect to axial cylinder 4 for L1 minutes, and slide member 22 changes relative position to axial cylinder 4 do not do. Further, since the position of the sliding member 22 does not change, the position of the cylindrical body 18 which is urged forward by the pressurizing coil spring 23 does not change either, and is fixed to the cylindrical body 18 via the elastic member 20. The relative position of the ballpoint pen refill 8 to the barrel 4 does not change either. For this reason, the gap between the outer step 18c of the cylindrical body 18 and the front end 6g of the rotating body 6 is shortened by L1 of the forward movement of the rotating body, so that the length to which the ballpoint pen refill 8 can retreat when writing pressure is L1. I'm going down Then, the amount of deformation of the elastic member 20 when the writing pressure is applied is also reduced, so that the pressure applied to the pressure space 21 is lowered, and as a result, the ink in the ballpoint pen refill 8 is rotated by rotating the rotary body 6 to the left by one step. The pressure applied to the rear end of 11 can be reduced.

Further, from the state of FIG. 10B, the pivoting member 6 is further viewed from the rear end side to rotate leftward (counterclockwise) to move the first cam projection 6d along the first cam slope 5f of the slide member 5 In the state of FIG. 10C, the first cam projection 6d of the rotating body 6 is moved from the second step 5g2 to the third step 5g3 next to the second step 5g2 by the first cam mechanism 30 as shown in FIGS. 11B to 11C. The second cam projection 6f of the rotating body 6 is moved from the second step 22b2 to the adjacent third step 22b3 by the second cam mechanism 40 as shown in FIGS. 12B to 12C. At this time, since the movement amount L2 of the first cam projection and the movement amount M2 of the second cam projection are the same, the sliding member 22 does not move, and only the rotary body 6 advances further by M2 with respect to the cylindrical body 18 The front end 6i of the rotating body 6 abuts on the outer step 18c of the cylindrical body 18.
In this state, since the cylindrical body 18 can not be retracted by the rotating body 6, the ballpoint pen refill 8 can not also be retracted, and the ink 11 is not pressurized even if writing pressure is applied at the time of writing, Since it can be used as a non-pressurizing writing instrument and the inside of the ballpoint pen refill 8 will not be pressurized even if stored in this state, the state of FIG. 10C allows ink from the tip of the ballpoint pen tip to be stored. Can be prevented.
Although not described in detail, in the present embodiment, it is possible to change the setting of the pressure applied to the ink 11 at the writing time by rotating the rotating body 6 even at the non-knocking time as well at the knocking time.

As described above, the pressure-sensitive writing instrument 1 according to the present embodiment operates the pressure adjustment mechanism 24 by rotating the rotating body 6 to adjust the pressure in the ink container 10 according to the preference of the user. The ballpoint pen refill 8 does not move back and forth relative to the barrel even if the setting of the pressure applied to the ink 11 is changed by pivoting the pivoting body 6, so the ballpoint pen refill 8 from the front end opening 3 a of the front shaft 3 The protruding length of the tip of the tip does not change, and it can be used without changing the position when gripping the writing instrument.

The pressure-type writing instrument 1 of the present embodiment includes a cylinder 4 capable of containing therein the refill 8 filled with the ink composition (ink) 11 for writing instrument, and an ink composition for writing instrument (ink And 11.) a pressurizing mechanism 7 for applying pressure to 11 and a pressurizing force adjusting mechanism 24 for adjusting the pressure.

According to such a pressure type writing instrument 1, a pressure type writing instrument 1 capable of applying a pressure to the ink composition (ink) 11 for writing instrument in the refill 8 as the refill 8 retreats due to the writing pressure at the time of writing. The pressure applied to the ink composition (ink) for writing instrument 11 can be adjusted by the pressure adjustment mechanism 24 to change the outflow amount of the ink composition (ink) 11 for writing instrument from the refill 8 at the time of writing. This makes it possible to adjust the thickness and / or density of the handwriting according to the preference of the user.

The pressure-sensitive writing instrument 1 of the present embodiment further includes a rotating body 6 provided so as to protrude from the rear end of the barrel 4, and the pressure adjustment mechanism 24 rotates the rotating body 6 to apply pressure. adjust.

According to such a pressure-sensitive writing instrument 1, when the user rotates the rotating body 6, the pressing force applied to the ink composition (ink) 11 for writing instrument can be easily adjusted.

The pressure-type writing instrument 1 of the present embodiment is provided with an ink storage cylinder 10 in which an ink composition (ink) 11 for writing instrument is filled in a cylinder 4, and a ballpoint pen tip 13 in the front portion of the ink storage cylinder 10. A pressure mechanism that accommodates the ballpoint pen refill 8 and applies a writing pressure to the back of the ballpoint refill 8 so that the ballpoint pen refill 8 retracts and applies pressure to the rear end of the ink composition (ink) 11 for writing instrument A pressing type writing tool 7 is disposed, and is operated by rotating the rotating body 6 which protrudes from the rear end of the shaft cylinder 4 to the rear of the pressing mechanism 7, and the ball pen refill 8 And the pressing mechanism 7 is engaged with the shaft cylinder 4 so as to be unrotatable and movable back and forth with respect to the shaft cylinder 4, and the rotating body 6 is rotated relative to the shaft cylinder 4. To be locked freely and to turn the rotating body 6 The pressure adjustment mechanism 24 operates to adjust the pressure applied to the rear end of the ink composition (ink) 11 for writing tool in the ink storage cylinder 10, and the axial cylinder in the axial direction before and after rotating the rotating body 6 It is configured such that the relative position of the ballpoint pen refill 8 to 4 does not change.

According to such a pressure type writing instrument 1, the pressing force adjusting mechanism 24 that changes the amount of retraction of the ballpoint pen refill 8 is operated by rotating the rotating body 6, and the ink composition (ink) for writing instrument 11 is written at the time of writing. By changing the pressure applied to the rear end of the ball pen, the outflow amount of the ink composition (ink) 11 for writing instruments from the tip of the ballpoint pen tip 13 of the ballpoint pen refill 8 is changed, and the thickness of the handwriting and the handwriting density are preferred by the user. It can be adjusted to suit.
In addition, since the pressure-sensitive writing instrument 1 of the present embodiment is a so-called writing pressure-pressing type, pressure is applied to the rear end of the writing instrument ink composition (ink) 11 only when the writing pressure is applied. Therefore, no pressure is applied to the rear end of the ink composition (ink) for writing instrument 11 during non-writing and storage, and it is possible to prevent the ink from leaking from the front end of the ballpoint pen tip 13.

Furthermore, when the rotating body 6 is rotated, the relative position between the ballpoint pen refill 8 and the shaft cylinder 4 does not change in the axial direction, whereby the front end portion of the ballpoint pen refill 8 is from the front end opening 3a of the shaft cylinder 4 There is no change in the projecting length. Therefore, it is not necessary to change the holding position of the shaft cylinder 4 even if the pressure is adjusted, and writing can be continued while keeping the sense of distance to the paper surface and the holding position constant.

In the pressure-sensitive writing instrument 1 of the present embodiment, the slide member 5 is disposed in the barrel 4 so as to be unrotatably engaged with the barrel 4 so as to be movable back and forth with respect to the barrel 4. The rotary unit 6 includes a pressure mechanism 7 disposed inward of the member 5 and a rotary unit 6 arranged such that a part thereof protrudes rearward from the rear end opening of the slide member 5. The front end portion of the ballpoint pen refill 8 is configured to project from the front end opening 3 a of the barrel 4 by pressing the front end of the ballpoint pen refill 8.

According to such a pressure-sensitive writing instrument 1, the pressure-sensitive writing instrument 1 can be a so-called knock-type pressure-sensitive writing instrument in which the front end portion of the ballpoint pen refill 8 protrudes from the front end opening 3a of the barrel 4 it can.

In the pressure-sensitive writing instrument 1 of the present embodiment, the pressing force adjusting mechanism 24 is inserted from the slide member 5 and the front end opening 3 a of the slide member 5 and rotatably and longitudinally movably engages the slide member 5. And a sliding member 22 disposed inside the rotating body 6 and held rotatably and longitudinally movably with respect to the rotating body 6. The first cam mechanism 30 for moving the rotating body 6 back and forth with respect to the slide member 5 between the rotating body 6 and the rotating body 6 between the rotating body 6 and the sliding member 22 And a second cam mechanism 40 for moving the sliding member 22 back and forth.

According to such a pressure-sensitive writing instrument 1, the pressing force (knocking operation) of the rotary member 6 causes the ball pen refill 8 to move in and out, and the rotary member 6 rotates the sliding member 22 back and forth to adjust the pressing force. It becomes possible to execute the operation separately. Therefore, the advancing and retracting mechanism according to the present embodiment can easily switch between the writing state and the non-writing state without adjusting the pressing force each time.
As a means for maintaining the state in which the front end portion of the ballpoint pen refill 8 protrudes from the front end opening 3a of the barrel 4 when the rotary body 6 is pressed, the slide member 5 interlocked with the back and forth movement of the rotary body 6 Even if a projecting hook 5a is provided, a clip 9 is formed on the outer peripheral portion of the barrel 4, and the hook 5a and a hook 9c formed on the clip 9 are hooked and maintained. It may be maintained by hooking the hooking portion to the hooking portion formed on the side surface of the shaft cylinder 4, but when the hooking state is released, the slide member 5 returns to the original position. It is preferable to have a configuration in which a coil spring, rubber, or the like is used.

Further, a first cam mechanism 30 for moving the rotating body 6 back and forth with respect to the slide member 5 is provided between the slide member 5 and the rotating body 6, and between the rotating body 6 and the sliding member 22 By providing the second cam mechanism 40 for moving the sliding member 22 back and forth with respect to the moving body 6, an operation of moving the rotating body 6 back and forth with respect to the slide member 5 when rotating the rotating body 6; The operation of moving the sliding member 22 back and forth with respect to the moving body 6 can be separated, and the operation of moving the rotating body 6 back and forth relative to the sliding member 5 and the sliding member 22 relative to the rotating body 6 The rotary member 6 is rotated by the same amount in the direction opposite to the back and forth movement of moving the rotary member 6 back and forth, and the sliding member 6 is moved back and forth with respect to the slide member 5 22 is configured so as not to move relative to the slide member 5 in the front-rear direction Rukoto can.

In the pressure-type writing instrument 1 of the present embodiment, the first cam mechanism 30 is formed on the inner surface of the slide member 5 such that the first cam slope 5 f is inclined with respect to the axial direction and extends in the axial direction. And a first cam projection 6d formed to be in sliding contact with the first cam slope 5f, and the second cam mechanism 40 is inclined to the outer surface of the sliding member 22 with respect to the axial direction A second cam inclined surface 22a extending in the circumferential direction and a second cam projection 6f formed on the inner surface of the rotating body 6 so as to be in sliding contact with the second cam inclined surface 22a.

According to such a pressure-sensitive writing instrument 1, the first cam mechanism 30 forms the first cam slope 5 f on the inner surface of the slide member 5, and forms the first cam projection 6 d on the outer surface of the rotating body 6. The rotary body 6 moves back and forth relative to the slide member 5 by forming the first cam projection 6d and the first cam slope 5f in sliding contact with each other. Further, the second cam mechanism 40 forms a second cam projection 6 f on the inner surface of the rotating body 6 and forms a second cam slope 22 a on the outer surface of the sliding member 22 to form a second cam projection 6 f The slide member 22 moves back and forth relative to the rotating body 6 by being configured to slide with the second cam slope 22a. The first cam mechanism 30 may be configured such that a cam projection is provided on the inner surface of the slide member 5 so that the cam projection and a cam slope formed on the outer surface of the rotating body 6 come into sliding contact. The second cam mechanism 40 may be configured such that a cam slope is provided on the inner surface of the rotating body 6 so that the cam slope and a cam protrusion formed on the outer surface of the sliding member 22 slide.

A first cam projection 6 d is formed on the outer surface of the rotating body 6, and a first cam slope 5 f in sliding contact with the first cam projection 6 d is provided on the inner surface of the slide member 5. Preferably, a second cam projection 6f is formed, and a second cam slope 22a in sliding contact with the second cam projection 6f is provided on the outer surface of the sliding member 22. In this case, By forming the

cam projections

6d and 6f, it becomes easy to control the sliding contact position between the rotary body 6 and the slide member 5 and the slide member 22, and the length by which the slide member 5 moves back and forth based on the rotary body 6; The effect of making it easy to make the lengths of the sliding members 22 to move back and forth coincide with each other is achieved.

Further, it is preferable to provide a plurality of stepped

portions

5g and 22b on the first cam slope 5f and the second cam slope 22a respectively formed on the inner surface of the slide member 5 and the outer surface of the slide member 22. By making it possible to switch the adjustment of the pressure when rotating 6 in a stepwise manner, it is possible for the user to easily adjust the pressure.

In the pressure-sensitive writing instrument 1 of the present embodiment, the pressing mechanism 7 is disposed inside the cylindrical body 18 having the through holes 18a penetrating in the front and back direction and the cylindrical body 18, and the rear end portion of the ballpoint pen refill 8 is A pressure chamber (pressure) formed between the elastic member 20 detachably mounted, the inner wall of the elastic member 20 and the rear end of the ink storage cylinder 10 and communicating with the rear end opening of the ink storage cylinder 10 Space 21), a stopper 19 disposed inward of the cylindrical body 18 and a rear of the elastic member 20, and an air hole 20c for communicating the pressure chamber (pressure space) 21 with the outside. The cylindrical member 18 is non-rotatably and rotatably engaged with the slide member 5, and the slide member 22 is engaged with the cylindrical member 18 so as to be movable back and forth with respect to the cylindrical member 18. Between the rear inner step of the body 18 and the front inner step of the slide member 22 (elastic coil spring (pressure coil spring) G) disposing the cylindrical body 18 forwardly with respect to the sliding member 22 and disposing the ball pen refill 8 with the cylindrical body 18 so that the elastic member 20 and the stopper 19 The elastic member 20 is deformed upon contact, and the pressure chamber (pressure space) 21 is compressed to apply pressure to the rear end of the ink composition 11 in the ink storage cylinder 10.

According to such a pressure-sensitive writing instrument 1, in the pressing mechanism 7, the elastic member 20 abuts on the stopper 19 and is deformed by the retraction of the cylindrical body 18 together with the ballpoint pen refill 8, and the elastic member 20 is deformed. The pressure chamber (pressure space) 21 in the elastic member 20 is compressed by the amount of deformation, and pressure is applied to the rear end of the ink composition (ink) 11 for writing instrument. In this case, when the compressed pressure chamber (pressure space) 21 is opened, the elastic force of the elastic member 20 makes it possible to return to the original non-compressed state, so an elastic body such as a spring is separately It is not necessary to arrange, and even when arranging a spring, the elastic force of the spring can be reduced, and it is possible to increase the degree of freedom in design.
The material used for the elastic member 20 is not particularly limited as long as it is a resin material having rubber elasticity. For example, nitrile rubber, ethylene propylene diene rubber, silicone rubber, thermoplastic elastomer, etc. are suitably used. it can.

Further, when the indicator is provided on the outer surface of the pivoting body 6 and the

step portions

5g and 22b abut the

cam projections

6d and 6f of the pivoting body 6, the display portion of the pivoting body 6 and the shaft cylinder 4 outer surface The position where the display unit provided in the unit coincides with the display unit may be configured to represent the strength of the pressure at that time.
In addition, as a method of expressing the strength of the pressing force, it is possible to use numbers (0, 1, 2, 3...), Letters (strong, middle, weak, no), symbols, etc. It is not a thing.

Note that various modifications can be made to the first embodiment described above. Hereinafter, modifications will be described with reference to the drawings as needed. In the following description and the drawings used in the following description, parts that can be configured in the same manner as in the first embodiment are denoted by the same reference numerals as those used for corresponding parts in the first embodiment, and overlap I omit explanation. In addition, when it is clear that the operation and effect obtained in the first embodiment can be obtained also in the modification, the description may be omitted.

FIG. 13 shows a pressure-sensitive writing instrument 100 according to the present modification, and a display unit 200 b formed by lines and numerals on the outer surface 200 a is formed on the back shaft 200 of the pressure-sensitive writing instrument 100. Further, on the outer surface 600 a of the rotating body 600, a display portion 600 b is formed in a concave shape and in a triangular shape as viewed from the side.

In this modification, when rotating the rotating body 600 in a state where the rotating body 600 is knocked forward, the front end top portion 600 c of the display portion 600 b is aligned with the linear portion 200 c of the display portion 200 b of the rear shaft 200 By reading the number portion 200d at the front of the linear portion 200c, it is possible to visually recognize the pressure applied to the rear end of the ink.
In this modification, when the front end top portion 600c of the display portion 600b is aligned with "2" of the numeral portion 200d, the pressing force is adjusted to be in the maximum state (FIG. 10A), and is adjusted to "1". At the same time, it was adjusted to be in a state where a low pressure is applied (FIG. 10B), and when adjusted to “0”, it was adjusted to be in a state where no pressure is applied (FIG. 10C) .

Second Embodiment
Next, a second embodiment will be described with reference to FIGS. 14 to 29C.
In the pressure-type writing instrument 101 of this embodiment, as shown in FIG. 14 to FIG. 19, a shaft cylinder 104 is formed by screwing the front shaft 103 in front of the rear shaft 102. The slide member 105 movably disposed, the rotating body 106 rotatably engaged with the slide member 105, the pressure mechanism 130 disposed in the slide member 105, and the pressure mechanism 130 The ball pen refill 108 is slidable back and forth in the barrel 104, and the clip 109 is rotatably engaged with the side of the rear shaft 102.

The ballpoint pen refill 108 has an ink viscosity of 755 mPa · s under conditions of a shear rate of 1.92 sec ⁻¹ (rotation speed of 0.5 rpm) in a writing ink (in an environment of 20 ° C.) in a transparent ink container 110 made of PP resin. The ink 111, which is a water-based gel ink), and the grease-like ink follower 112, which follows the consumption of the ink 111, are accommodated directly at the rear end of the ink 111. The rear end portion of the ballpoint pen tip 113 which rotatably holds 38 mm) is press-fit fitted.

As shown in FIG. 15, the front shaft 103 is formed with a front end opening 103a at the front end thereof from which the ballpoint pen tip 113 of the ballpoint pen refill 108 can project.

The rear shaft 102 is formed in a tubular shape, and as shown in FIG. 16, a side hole 102 b extending in the axial direction on the outer side surface 102 a and penetrating to the inner hole is formed. Further, a clip engaging portion 102c which protrudes outward is formed on the outer side surface 102a, and the clip engaging portion 102c is constituted by a clip engaging projection 102d and a spring engaging projection 102e. A locking hole 102f is formed in the clip locking projection 102d in a direction perpendicular to the axial direction.
In addition, a locking rail portion 102g which protrudes inward and extends in the front and rear direction is formed on the rear inner peripheral surface of the rear shaft 102, and the inner peripheral surface is formed in a circumferentially extending concave shape on the front inner peripheral surface. A stop 102i is formed.

Further, as shown in FIG. 14, on the rear outer peripheral surface of the rear shaft 102, a pressing force display portion 102h formed by a linear portion and a numeral is formed. The pressing force display portion 102h may be formed by decorating the outer peripheral surface of the rear shaft 102 using printing, transfer, painting or the like, and integrally formed as a concave portion or a convex portion by injection molding or the like. You may form.

In addition, a ring-shaped middle piece 107 is disposed inward of the rear shaft 102, and an outward locking portion 107 a formed on the outer peripheral portion of the middle piece 107 is an inner locking portion of the rear shaft 102. The middle piece 107 is non-removably attached to the rear shaft 102 by dropping and fitting to 102i. Furthermore, an inner step portion 107 b is formed on the rear inner periphery of the middle piece 107.

As shown in FIGS. 15 to 18, the slide member 105 has a hook portion 105 a that protrudes outward on the outer peripheral portion, and the hook portion 105 a is inserted into the side hole 102 b of the rear shaft 102. In addition, a locking groove 105b extending in the axial direction is formed on the rear outer side surface of the slide member 105, and by mounting the locking groove 105b in the locking rail portion 102g of the rear shaft 102, the rear The slide member 105 is engaged with the shaft 102 so as to be slidable back and forth and non-rotatable.

Further, as shown in FIG. 17, on the side surface of the slide member 105, slit portions 105c extending rearward from the front end are formed, and the slit portions 105c are formed symmetrically at two points sandwiching the axial center. . Then, a slit engaging portion 105d in which the slit width is partially narrowed is formed at the rear of the slit portion.
Further, on the inner surface of the slide member 105, there is formed a first cam slope 105e which is formed to be inclined along the axial circumferential direction and protrudes inward, and a plurality of the first cam slopes 105e are formed. A stepped portion 105 f (a first stepped portion 105 f 1, a second stepped portion 105 f 2, and a third stepped portion 105 f 3) is formed. The plurality of stepped portions 105f are each formed with a recess 105g formed in a concave shape toward the rear.

A tubular spacer ring 114 is disposed in front of the slide member 105, and a rear portion 114a is formed at the rear of the spacer ring 114. Further, the rear end portion 114 a is attached to the spacer ring 114 by inserting the rear end portion 114 a into the inner peripheral portion 105 h of the slide member 105.
Furthermore, as shown in FIG. 16, the knocking coil spring 115 is compressed between the inner step portion 107b of the middle piece 107 mounted on the inner surface of the rear shaft 102 (shaft cylinder 104) and the inner step portion 114b of the spacer ring 114. By stretching in a state, the slide member 105 is resiliently ejected rearward with respect to the rear shaft 102 (shaft cylinder 104) via the spacer ring 114.

In the clip 109, as shown in FIGS. 14 to 16, the coil spring 116 for clip is disposed between the locking projection 102e for spring of the rear shaft 102 and the inner wall portion 109a of the clip 109. The distal end portion of the clip 109 is stretched over the outer wall surface side of the rear shaft 102 so as to be always resilient by locking the locking shaft portion 109b formed in the wall in the locking hole 102f. Further, by pressing the rear end portion of the clip 109 (in the direction of arrow G in FIG. 15), the locking axis R between the clip 109 and the rear shaft 102 is used as a fulcrum. As a movable clip that can be separated from the
In the front portion of the clip 109, a hooked portion 109c extending from the base portion 109d to the shaft cylinder 104 side and hooked with a hooked portion 105a formed on the side surface of the slide member 105 is formed.

As shown in FIGS. 15 to 17, the pressing mechanism 130 is housed behind the ballpoint pen refill 108 of the ballpoint pen refill 108 and inward of the slide member 105 so as to be movable back and forth relative to the slide member 105, and has a cylindrical shape. And a piston 118 which is disposed at the rear of the cylinder 117 so as to be movable back and forth with respect to the cylinder 117, and is mounted so as to be movable back and forth in a front inner periphery of the cylinder 117, An air-tight valve 119 removably mounted on the rear end of the ball-point pen refill 108, a pressure coil spring (elastic member) 120 stretched between the air-tight valve 119 and the piston 118, a cylinder 117 and a piston A pressurized space (enclosed by 118 and the air tight valve 119) communicates with the rear inner bore 108a of the ballpoint pen refill 108 A pressure chamber) 121, in are constituted.

More specifically, as shown in FIGS. 15-17, the cylinder 117 is provided with a through hole 117a which is penetrated back and forth and has a plurality of steps. Further, on the outer peripheral portion of the cylinder 117, a locking projection 117b protruding outward and a side hole 117c which penetrates to the through hole 117a and extends in the axial circumferential direction are formed.
Furthermore, a flat portion 117e is formed in the rear inner hole 117d of the cylinder 117 as shown in FIG.

As shown in FIGS. 17 and 19, the locking protrusion 117b of the cylinder 117 is engaged with the slit locking portion 105d and the locking protrusion 117b of the slit locking portion 105d of the slit portion 105c formed on the side surface of the slide member 105. The clearance in the axial direction is loosely fitted so as to be movable back and forth, whereby the cylinder 117 is locked together with the slide member 105 so as not to be rotatable relative to the rear shaft 102 (shaft cylinder 104) and movable back and forth. Ru.

More specifically, as shown in FIGS. 15-19, the piston 118 is formed with a front end recess 118a that is recessed rearward at the front end. Further, a groove 118b extending in the axial direction is formed on the side, and the first O-ring 122 formed of silicone rubber having a durometer A hardness of 50 measured according to JIS-K6235 as an airtight member is formed in the groove 118b. It is attached. The outer end of the first O-ring 122 (air-tight member) is configured to abut on the inner peripheral surface of the cylinder 117, and the first O-ring 122 (air-tight member) makes the space between the cylinder 117 and the piston 118 To seal the pressurized space 121, and a certain sliding resistance is generated when the piston 118 slides back and forth relative to the cylinder 117.
Furthermore, the piston 118 is formed to be larger in diameter at the front than at the rear, and the outward movement of the piston 118 is restricted by the outer surface step portion 118c formed on the outer peripheral portion abutting on the inner step 117h of the cylinder 117. is there. A flat portion 118g is formed on the outer periphery of the rear portion of the piston 118. By mounting the flat portion 118g on the flat portion 117e of the cylinder 117, the piston 118 can be moved back and forth relative to the cylinder 117 It is mounted immovably.

Further, a second cam slope 118d is formed on the side surface of the piston 118. A plurality of step portions 118e (a first step portion 118e1, a second step portion 118e2, and a third step portion 118e3) are formed on the second cam slope 118d, and each of the plurality of step portions 118e is made forward A concave portion 118f formed in a concave shape is formed.

More specifically, as shown in FIGS. 15-17, the airtight valve 119 extends axially along the inside thereof, and the rear inner bore 108a of the ball pen refill 108 and the pressurizing space 121 The connecting inner hole 119a is formed. The front portion 119b of the airtight valve 119 is smaller in diameter than the rear outer peripheral portion, and the front portion 119b is formed with a mounting portion 119c to which the rear inner hole 108a of the ballpoint pen refill 108 is detachably mounted. Therefore, the pressurizing space 121 (pressurizing chamber) is communicated with the rear inner hole 108 a of the ballpoint pen refill 108 by the inner hole 119 a of the airtight valve 119.

Further, an outer protrusion 119d is formed on an intermediate outer peripheral portion of the airtight valve 119, and a flange portion 119g protruding outward is formed in front of the outer protrusion 119d. Then, the outer projection 119d of the airtight valve 119 is inserted into the side hole 117c of the cylinder 117, whereby the airtight valve 119 is attached to the cylinder 117 so as to be movable back and forth and not to be removed.
The back and forth movement of the cylinder 117 with respect to the airtight valve 119 is caused by the front end of the outer protrusion 119d abutting on the front end of the side hole 117c or by the rear end of the flange portion 119g abutting on the front end of the cylinder 117 It is configured to be restricted.

Furthermore, a groove 119e extending in the axial direction is formed on the rear outer peripheral surface of the airtight valve 119, and the groove 119e is formed of silicone rubber having a durometer A hardness of 50 measured according to JIS-K6235 as an airtight deformation part. The second O-ring 123 is attached.
The second O-ring 123 (airtight deformation portion) is configured to be able to abut on the contact portion 117g (the rear end of the side hole 117c) of the cylinder 117, and the second O ring 123 (airtight deformation) When the contact portion 117g (the rear end of the side hole 117c) of the cylinder 117 is in contact with each other, the pressurizing space 121 is sealed to ensure airtightness, and the second O ring 123 (for airtightness) When the deformed portion and the abutting portion 117g (the rear end of the side hole 117c) of the cylinder 117 are not in contact with each other, the second O ring 123 (airtight deforming portion) and the side hole 117c of the cylinder 117 The space between the rear end portion and the side hole 117c form an air passage 124 communicating between the pressurizing space 121 and the outside of the pressure-sensitive writing instrument 101, and the pressurizing space 121 has the same pressure as the outside air. It is configured to be

Further, a rear inner step portion 119 f is formed in the inner hole 119 a of the air tight valve 119, and the air pressure sealing coil spring 120 is stretched between the rear inner step portion 119 f and the front end recess 118 a of the piston 118. A valve 119 is sprung forward with respect to the piston 118.
Further, since the flange portion 119g of the airtight valve 119 is configured to abut on the rear end of the spacer ring 114, the piston 118 is also urged backward by the pressurizing coil spring 120 via the airtight valve 119. Become.

Next, the pivoting member 106 will be described in detail. As shown in FIGS. 15 to 16, the pivoting member 106 is inserted into the inside of the slide member 105 from the front end opening of the slide member 105 and the rear opening of the slide member 105 It is attached so that a part may project from the rear to the rear.

Further, as shown in FIG. 17, the pivoting body 106 is formed so as to extend from the front outer peripheral surface 116 a to the rear from the first cam projection 106 b and from the rear inner peripheral surface 106 c to the front. And the second cam projection 106d.
A first cam mechanism 140 is configured by the first cam projection 106b of the pivoting body 106 and the first cam slope 105e of the slide member 105 being cam fitted, and the second cam projection of the pivoting body 106 is formed. A second cam mechanism 150 is configured by the cam engagement between 106 d and the second cam slope 118 d of the piston 118.

Further, as shown in FIG. 14, an alignment marker 106 f formed in a concave shape and in a triangular shape as viewed from the side is formed on the outer peripheral surface of the rear portion of the rotating body 106.
In the present embodiment, when the rotating body 106 is rotated in a state where the rotating body 106 is knocked forward, the front end top portion 106g of the alignment marker 106f is a linear portion of the pressing force display portion 102h of the rear shaft 102. The pressure applied to the rear end of the ink can be visually recognized by reading the numeral at the front of the linear portion.
In this embodiment, when the alignment marker 106f is aligned with "3" of the pressing force display portion 102h, the pressurization in the pressurization space (pressure chamber) 121 is maximized (FIG. 27A). Adjustment is made so that low pressure is applied when it is adjusted to "2" (FIG. 27B), and no pressure is applied when it is adjusted to "1". It is adjusted to become FIG. 27 C).

Furthermore, a tail plug 125 formed of a thermoplastic elastomer is press-fitted at the rear end opening of the pivoting body 106, and a protrusion extending along the axial direction is formed on the side surface of the tail plug 125 in the axial direction. By arranging the plurality of members in a uniform arrangement, it becomes difficult to slip when rotating the rotary body 106 together with the tail plug 125.

The pressing force adjustment mechanism 160 is capable of changing the pressure applied to the pressing space 121 by rotating the rotating body 106 with the slide member 105, the rotating body 106, the tail plug 125, and the piston 118. Configured

Next, a state will be described in which the ballpoint pen tip 113 which is the writing tip of the ballpoint pen refill 108 is made to protrude and retract from the front end opening 103a of the front shaft 103 by pressing the rotary body 106 forward (knock operation).
When the tail plug 125 and the pivoting body 106 are pushed forward (in the direction of the arrow F in FIG. 15) against the elastic force of the knocking coil spring 115 from the state of FIG. Since the second cam sloped surface 118 d of the piston 118 is in a cam-fit state, the piston 118 is pushed by the rotating body 106 and advances with the rotating body 106. When the front end 106e of the rotating body 106 abuts against the rear end 117f of the cylinder 117, the cylinder 117 advances, and when the front end of the cylinder 117 abuts against the flange portion 119g of the airtight valve 119, the cylinder 117 together with the airtight valve 119 and the ballpoint pen refill 108 mounted on the mounting portion 119c of the airtight valve 119 advance, and the front end portion of the ballpoint pen tip 113 of the ballpoint pen refill 108 protrudes from the front end opening portion 103a of the front shaft 103.
At this time, since the locking projection 117b of the cylinder 117 is loosely fitted in the slit locking portion 105d of the slide member 105 so as to be movable back and forth, the locking protrusion 117b of the cylinder 117 advanced to the front end of the slit locking portion 105d is The slide member 105 starts to move forward due to the contact, and the hook portion 105a of the slide member 105 is hooked on the hooked portion 109c of the tip of the clip 109 disposed on the side of the rear shaft 102. In the state of FIG. 20, the front end of the ballpoint pen tip 113 of the refill 108 is maintained in the state of protruding from the front end opening 103a of the front shaft 103 (shaft cylinder 104).

When the rear end of the clip 109 is pressed (in the direction of arrow G in FIG. 20) and the hooking portion 105a of the slide member 105 hooked on the hooking portion 109c of the clip 109 is released, the knocking occurs. The resilient force of the coil spring 115 causes the ballpoint pen refill 108, the pressure mechanism 130, the spacer ring 114, the slide member 105, and the pivoting member 106 to move rearward and return to the state of FIG.

Next, in the present embodiment, a state in which pressure is applied to the rear end of the ink 111 in the ballpoint pen refill 108 via the ink follower 112 by the writing pressure at the time of writing will be described.
In a state where the front end of the ballpoint pen tip 113 in FIGS. 20 and 23 protrudes from the front end opening portion 103a of the front shaft 103, the shaft cylinder 104 is inclined and held as shown in FIG. When the ballpoint pen refill 108 retracts in the direction of arrow H in FIG. 21, the slide member 105 can not retract because the hook portion 105a is hooked on the hooked portion 109c of the clip 109, and the pivoting member 106 is a slide member. The cam 118 is engaged with the cam 105 so that it can not retract, and furthermore, the piston 118 can not retract because the cam is engaged with the rotating body 106. Therefore, the ballpoint pen resists the elastic force of the pressure coil spring 120. The airtight valve 119 retracts with the refill 108. Then, when the second O-ring 123 fixed to the airtight valve 119 abuts on the contact portion 117g (the rear end of the side hole 117c) of the cylinder 117, the pressure space (pressure chamber) 121 and the outside are The air passage 124 that has been in communication is closed, and the inside of the pressurizing space 121 is airtight as shown in FIG. Furthermore, when the ballpoint pen refill 108 is retracted, the cylinder 117 is retracted with respect to the piston 118 together with the airtight valve 119, and the volume of the pressurized space 121 is reduced to compress the inside of the pressurized space 121 and the inner hole of the airtight valve 119. The pressure is applied to the rear end of the ink 111 in the ballpoint pen refill 108 through the ink follower 119 through the ink follower 112 as shown in FIGS.

Here, when the writing pressure applied to the front end of the ballpoint pen tip 113 is released from the state of FIG. 22 and FIG. 25, the airtight valve 119 advances by the elastic force of the pressure coil spring 120. At this time, the second O-ring 123 and the cylinder 117 are lightly fitted because the second O-ring 123 is deformed by pressing the second O-ring 123 against the abutting portion 117g (the rear end of the side hole 117c) of the cylinder 117 by writing pressure. It is in the state. Therefore, the cylinder 117 is pulled forward as the air tight valve 119 advances, and the cylinder 117 also tries to advance simultaneously. However, the fitting force between the piston 118 and the cylinder 117 by the first O ring 122 is set larger than the fitting force between the air tight valve 119 and the cylinder 117 by the second O ring 123. As a result, the cylinder 117 does not move relative to the piston 118, and the state of FIG. Thus, when the second O-ring 123 and the contact portion 117g of the cylinder 117 (the rear end of the side hole 117c) are separated, an air passage 124 is formed, and the pressurizing space 121 and the outside communicate with each other. It becomes the same pressure. Thereafter, when the front end of the outward projection 119d of the airtight valve 119 advances and the front end of the side hole 117c of the cylinder 117 abut each other, the cylinder 117 is also delayed to start advancing, and returns to the state of FIGS. As a result, the ink 111 in the ink storage cylinder 110 is consumed by writing with the pressure-sensitive writing instrument 101 in a state where the writing pressure is applied, and the cylinder at the time of writing pressure release Since the air passage 124 is formed by the forward movement of the airtight valve 119 before the forward movement of the point 117, and the pressurized space 121 has the same pressure as the atmosphere, the inside of the pressurized space 121 is equivalent to that when compressed by the writing pressure. It was possible to prevent negative pressure from becoming lower than atmospheric pressure without forced depressurization.

As an example, the fitting force generated between the airtight valve 119 and the cylinder 117 by the second O-ring 123 in the state of FIGS. 22 and 25 in which the writing pressure is applied to the front end of the ballpoint pen tip 113 of this embodiment. (The pressing force required to move the cylinder 117 with respect to the hermetic valve 119) is 0.1 N, and the fitting force generated between the piston 118 and the cylinder 117 by the first O-ring 122 (on the piston 118 On the other hand, since the pressing force required to move the cylinder 117 is 0.5 N, when the writing pressure is released, the cylinder 117 does not move relative to the piston 118 so that only the airtight valve 119 advances first. Configured

Next, in the knocking state shown in FIG. 20, an operation of adjusting the pressure applied to the ink 111 by operating the pressure adjustment mechanism 160 by rotating the rotating body 106 with respect to the rear shaft 102 will be described.
From the state of FIG. 20 and FIG. 27A until the front end top portion 106g (see FIG. 14) of the alignment marker 106f of the rotating body 106 matches the position “3” to “2” of the pressing force display portion 102h of the rear shaft 102. When the pivoting member 106 is turned leftward (counterclockwise) as viewed from the rear end side and in the state shown in FIG. 27B, the slide member 105 is engaged with the rear shaft 102 so as not to be pivotable, As shown in FIGS. 28A to 28B, the first cam projection 106b of the rotating body 106 moves along the first cam slope 105e of the slide member 105 from the first step 105f1 to the adjacent second step 105f2. At this time, the pivoting member 106 advances with respect to the slide member 105 for L1 (see FIG. 28A) in which the first cam projection 106b has moved one step.
Since the piston 118 is non-rotatably engaged with the rear shaft 102 (shaft cylinder 104) via the cylinder 117 and the slide member 105, FIGS. 29A to 29B are accompanied by the rotation of the rotating body 106. As described above, the second cam projection 106 d of the rotating body 106 moves from the first step 118 e 1 to the adjacent second step 118 e 2 along the second cam slope 118 d of the piston 118. At this time, the piston 118 retracts with respect to the rotating body 106 for M1 (see FIG. 29A) in which the second cam projection 106d has moved one step. Therefore, the piston 118 is advanced by L 1 by the first cam mechanism 140 and is retracted by M 1 by the second cam mechanism 150. And in this embodiment, since it is constituted so that it may be set to L1 = M1, only rotation object 106 will advance only for L1 with respect to axial cylinder 104, and relative position does not change piston 118 relative to axial cylinder 104. In addition, since the position of the piston 118 does not change, the position of the airtight valve 119 which is urged forward by the pressurizing coil spring 120 does not change either, and the ball pen refill 108 attached to the mounting portion 119 c of the airtight valve 119. The relative position with respect to the shaft cylinder 104 also does not change. As a result, the gap between the rear end 117f of the cylinder 117 and the front end 106e of the rotating body 106 becomes shorter by L1 when the rotating body 106 advances, so the length to which the ball pen refill 108 can retract when writing pressure is reduced also by L1. The pressure applied to the inside of the pressurizing space 121 is reduced by reducing the amount of compression of the pressurizing space (pressurizing chamber) 121. As a result, the pressure applied to the rear end of the ink 111 in the ballpoint pen refill 108 can be reduced by rotating the rotary body 106 by one step in the left direction (counterclockwise) when viewed from the rear end side.

Further, from the state of FIG. 27B, the front end top portion 106g (see FIG. 14) of the alignment marker 106f of the rotating body 106 is rotated from the point “2” to the point “1” of the pressing force indicator 102h of the rear shaft 102. By rotating the moving body 106 in the left direction (counterclockwise) and moving the first cam protrusion 106b along the first cam slope 105e of the slide member 105 to the state of FIG. 27C, the first cam The first cam projection 106b of the rotating body 106 is moved from the second step 105f2 to the adjacent third step 105f3 by the mechanism 140 as shown in FIGS. 28B to 28C, and the second cam mechanism 150 is moved to the view of FIG. As indicated by 29C, the second cam projection 106d of the rotating body 106 moves from the second step 118e2 to the adjacent third step 118e3. At this time, since the movement amount L2 of the first cam projection 106b and the movement amount M2 of the second cam projection 106d are the same, the piston 118 does not move, and only the rotary body 106 advances further by M2 with respect to the cylinder 117. The front end 106 e of the rotating body 106 abuts on the outer surface step portion 118 c of the piston 118.
In this state, the rear end 117f of the cylinder 117 can not move backward because it abuts on the front end 106e of the rotating body 106, so the length of the backward movement of the ballpoint pen refill 108 also decreases, and the pressure space 121 is sealed. Can not Therefore, the ink 111 is not pressurized by the pressing mechanism 130 even when writing pressure is applied at the time of writing, and can be used as a non-pressurizing writing instrument, and even when stored in a knocked state, the ballpoint pen refill 108 Since the inside is not pressurized, it is possible to prevent the outflow of the ink 111 from the tip of the ballpoint pen tip 113 during storage.
Although not described in detail, in the present embodiment, it is possible to change the setting of the pressure applied to the ink 111 at the time of writing by rotating the rotating body 106 even at the non-knocking time as at the knocking time.

In the present embodiment, as an example, writing pressure is applied to operate the pressing mechanism 130 in a state in which the alignment marker 106f of the rotating body 106 is aligned with the position "3" of the pressing force display portion 102h of the rear shaft 102. When the atmospheric pressure is 1000 hpa, the pressure state in the pressure space 121 is 1040 hpa, and 1020 hpa when the alignment marker 106f is aligned with "2" of the pressure display portion 102h. In the state where the alignment marker 106f is aligned with the position of "1", the pressure is 1000 hpa at the same pressure as the atmospheric pressure because of no pressure.

As described above, the pressure-sensitive writing instrument 101 according to the present embodiment adjusts the pressure within the ink container 110 according to the preference of the user by rotating the rotating body 106 and operating the pressure adjustment mechanism 160. While changing the amount of ink discharged from the tip of the ballpoint pen tip 113 enables the thickness of the handwriting and the handwriting density to be improved, the ballpoint pen refill can be performed even if the setting of the pressure applied to the ink 111 is changed by rotating the rotating body 106. Since 108 does not move back and forth relative to the barrel, the length at which the tip of the ballpoint pen refill 108 projects from the front end opening 103a of the front stem 103 does not change, and the gripping position of the writing implement is changed. It became possible to continue using it. In addition, it was possible to provide a pressure-sensitive writing tool capable of preventing the backflow of the ink 111 in the ink storage cylinder 110 because the inside of the pressure space 121 (pressure chamber) becomes negative pressure when the writing pressure is released.

The pressure-type writing instrument 101 of the present embodiment is provided with an ink storage cylinder 110 in which an ink composition (ink) 111 for writing instrument is filled in a shaft cylinder 104, and a ballpoint pen tip 113 in the front portion of the ink storage cylinder 110. The ballpoint pen refill 108 is accommodated, and a pressure is applied to the back of the ballpoint pen refill 108 so that the ballpoint pen refill 108 retracts to apply a pressure to the rear end of the ink composition 111 for writing instrument. In the pressure-type writing instrument 101 provided, the pressing mechanism 130 has a cylinder 117 formed in a cylindrical shape, and an airtight deformation portion (second O-ring) 123 on the outer peripheral surface. An airtight valve 119 formed so as to be movable back and forth, a piston 118 mounted so as to be movable back and forth in a rear inner hole 117d of the cylinder 117, and a piston 1 A ballpoint pen refill is surrounded by an airtight member (first O-ring) 122 disposed between the cylinder 8 and the cylinder 117, the cylinder 117, the airtight valve 119, the piston 118 and the airtight member (first O-ring) 122 A pressurizing chamber (pressurizing space) 121 communicated with the rear of the 108, and a resilient member (pressurizing coil spring) 120 disposed between the hermetic valve 119 and the piston 118 and resiliently urging the hermetic valve 119 forward; When the writing pressure is applied to the front end of the ballpoint pen tip 113, the ballpoint pen refill 108 retracts, and the cylinder 117 and the airtight valve 119 are resilient members in conjunction with the retraction of the ballpoint pen refill 108 (coil spring for pressurizing). It moves backward against the piston 118 against the elastic force of 120, and after sealing the inside of the pressure chamber (pressure space) 121, it is compressed and pressurized. When the writing pressure on the ballpoint pen refill 108 is released, the air tight valve 119 advances to the piston 118 earlier than the cylinder 117 so that the air passage 124 communicating the pressure chamber (pressure space) 121 with the outside The pressure chamber (pressurized space) 121 is released from the air-tight state and is brought to the same pressure as the atmospheric pressure, and then the cylinder 117 advances with a delay.

Airtight member (first O-ring) 122 In such a pressure-sensitive writing instrument 101, when writing pressure is applied to the front end of the ballpoint pen refill 108, the cylinder 117 and the air tight valve 119 become resilient members (coiling spring for pressure) 120. The cylinder 117 retracts against the elastic force and retracts, pressurizes the inside of the pressure chamber (pressurized space) 121, and pressurizes the ball pen refill 108. As the air tight valve 119 advances to the piston 118 earlier, an air passage 124 is formed to communicate the pressurizing chamber (pressurizing space) 121 with the outside. For this reason, the ink for writing tool in the ink storage cylinder 110 is consumed by writing, and even if the pressure in the pressure chamber (pressure space) 121 is lowered, the airtightness of the pressure chamber (pressure space) 121 In order to return the relative position of the airtight valve 119, the cylinder 117 and the piston 118 to the state before applying the writing pressure after releasing the state, the negative pressure in the pressurizing chamber (pressurizing space) 121 is lower than atmospheric pressure. It is possible to prevent the ink from flowing back due to entrapment of air from the tip of the ballpoint pen tip 113.

In the pressure-type writing instrument 101 of this embodiment, when writing pressure is applied to the front end of the ballpoint pen refill 108, the airtight deformation portion (second O-ring) 123 of the airtight valve 119 abuts on the contact portion of the cylinder 117 Thus, the pressure chamber (pressurized space) 121 is configured to be airtight, and the pressure-sensitive deformation portion (second O-ring) of the airtight valve 119 is released when the writing pressure on the ballpoint pen refill 108 is released. The fitting force generated between the piston 118 and the cylinder 117 is made larger by the sealing member (first O-ring) 122 than the fitting force generated between the gas tight valve 119 and the contact portion of the cylinder 117 by 123. The air tight valve 119 is configured to advance to the piston 118 prior to the cylinder 117.

In such a pressure-sensitive writing instrument 101, when the writing pressure is applied, the cylinder 117 which is pushed by the airtight valve 119 and retreats simultaneously is released by the airtight member (first O-ring) 122 when the writing pressure is released. And the engagement force between the air tight valve 119 and the front inner end of the cylinder 117 is released. An air passage 124 communicating with the outside is formed between the air-tight deformation portion (second O-ring) 123 and the front inner end, so that the cylinder 117 can be advanced before the writing pressure is released. The airtight state in the pressure chamber (pressure space) 121 can be released.
In the present embodiment, when the writing pressure is released, the fitting force generated between the airtight valve 119 and the front inner end of the cylinder 117 by the airtight deformation portion (second O-ring) 123, and The fitting force generated between the piston 118 and the cylinder 117 by the sealing member (first O-ring) 122 is necessary to slide the cylinder 117 relative to the sealing member (first O-ring) 122 And the pressing force required to slide the cylinder 117 relative to the piston 118, and the fitting force of each can be measured by using a push-pull gauge.

Furthermore, the sealing deformation portion (second O-ring) 123 of the sealing valve 119 in this embodiment may be integrally formed on the side surface of the sealing valve 119 using two-color molding or the like, and has rubber elasticity. You may form by latching other components, such as an O-ring. In addition, as a material which comprises the deformation part for airtightness (2nd O ring) 123, use synthetic resin which has rubber elasticity, such as silicone rubber, nitrile rubber, ethylene propylene diene rubber, a fluoro resin, and a thermoplastic elastomer. The hardness is measured as a durometer A hardness measured according to JIS-K 6235 so that the inside of the pressure chamber (pressure space) 121 tends to be airtight when the O-ring abuts on the front inner end of the cylinder 117. It is preferable to form by 20 or more and 90 or less.

In addition, an airtight member (first O-ring) 122 disposed between the cylinder 117 and the piston 118 seals between the cylinder 117 and the piston 118 to form an airtight state, and the cylinder 117 and the piston It is preferable to fix to either of the cylinder 117 or the piston 118 so that a suitable frictional force is generated between it and 118, and in consideration of the ease of assembly, it is preferable to lock on the outer peripheral portion of the piston 118. The air-tight member (first O-ring) 122 is integrally formed on the outer surface of the piston 118 or the inner surface of the cylinder 117 by two-color molding or the like, similarly to the air-tight deformation portion (second O-ring) 123 of the air-tight valve 119. You may
Further, as a material constituting the airtight member (first O-ring) 122, a synthetic resin having rubber elasticity such as silicone rubber, nitrile rubber, ethylene / propylene / diene rubber, fluorine resin, thermoplastic elastomer can be used, The hardness is preferably set to 20 or more and 70 or less as a durometer A hardness measured in accordance with JIS-K6235.

The pressure-type writing instrument 101 of the present embodiment adds pressure so that the air in the sealed pressure chamber (pressurizing space) 121 in contact with the rear end of the ink for writing instrument contained in the ink storage cylinder 110 becomes atmospheric pressure higher than atmospheric pressure. By pressing, it becomes possible to make it easy to discharge the ink for writing instrument, and the degree to which the pressure is applied may be appropriately set according to the characteristics such as the viscosity of the ink for writing instrument and the structure of the ballpoint pen tip 113.
When the atmospheric pressure is set to 1000 hPa, for example, a pressure chamber (pressure space) is used for a low viscosity ink for writing instruments (for example, an ink for writing instruments having a viscosity of 1 mPa · s to 2000 mPa · s under an environment of 20 ° C.). By setting the pressure of the sealed air in the pressure 121 to a pressure of more than 1005 hPa and in the range of 1500 hPa, it is possible to easily discharge the ink for writing tool.

The pressure-

type writing instrument

1, 100, 101 can be implemented without being limited to the type of ink, such as oil-based ink and water-based ink. In particular, when using a water-based ink or a water-based ink with shear thinning, the amount of ink discharge by pressure increase and decrease greatly, and the difference due to changes in pressure such as thickness and width of handwriting and density of handwriting is large. It can be used. Furthermore, when a thermochromic ink using a microcapsule pigment is used as the ink, it is generally desirable that the ink discharge amount be high because the handwriting tends to be thin, but when the ink discharge amount is high, the writing distance is increased. Since the influence is also large, the present invention, in which the pressure can be varied according to the application, can be suitably used.

Next, a modification of the second embodiment will be described with reference to FIGS. 30 to 35. In the following description and the drawings used in the following description, parts that can be configured in the same manner as in the second embodiment are denoted by the same reference numerals as those used for the corresponding parts in the second embodiment, and overlap I omit explanation. Moreover, when it is clear that the effect obtained in the second embodiment can be obtained also in the modified example, the description may be omitted.

FIG. 30 is a partial vertical cross-sectional view showing a pressure-sensitive writing instrument 201 according to this modification, and shows the pressure-sensitive writing instrument 201 in a state where the rotating body 106 is knocked forward. FIG. 31 is a view showing a cross section of the pressure-sensitive writing instrument 201 corresponding to the line XXXI-XXXI in FIG. 30, and FIG. 32 shows components constituting a pressure mechanism and a pressure adjustment mechanism of the pressure-type writing instrument 201. FIG. 33 is an exploded view, and FIG. 33 is a longitudinal cross-sectional view showing a rotating body 106 of the pressure-sensitive writing instrument 201 in an enlarged manner.

In the pressure-type writing instrument 201 of this modification, an example in which a thermochromic ink is used as the ink composition 111 for a writing instrument to be filled in the ballpoint pen refill 108 will be described. The ink composition (ink) 111 for a writing tool of this modification is a reversible thermochromic ink containing a reversible thermochromic microcapsule pigment. Therefore, the formed handwriting is thermochromic, and changes color or color upon heating or cooling. In addition, it is not restricted to this, It is also possible to use other ink compositions other than a thermochromic ink as ink composition (ink) 111 for writing instruments.

The average particle size of the microcapsule pigment is preferably 0.1 μm to 5.0 μm, more preferably 0.1 μm to 4.0 μm, and still more preferably 0.5 μm to 3.0 μm. By setting the average particle diameter of the microcapsule pigment in the above-mentioned numerical range, the writing feeling of the writing instrument of the present invention can be made smoother while maintaining high color development. The particle diameter and the particle size distribution can be measured, for example, by the Coulter method (electrical detection zone method). Specifically, measurement is performed using a precision distribution measurement apparatus (Multisizer 4e manufactured by Beckman Coulter, Inc.), and the average particle diameter (median diameter) is calculated on a volume basis based on the numerical value. Alternatively, it is measured using a laser diffraction / scattering particle size distribution measuring apparatus (manufactured by Horiba, Ltd .; LA-300), and the average particle size (median size) is calculated based on the value calibrated using a standard sample. It can be calculated by

The content of the reversible thermochromic microcapsule pigment is preferably 5 to 40% by mass, more preferably 10 to 40% by mass, and more preferably 15 to 35% by mass, based on the total amount of the ink composition. Is more preferred. By setting the content of the reversibly thermochromic microcapsule pigment in the above numerical range, it is possible to improve the coloring performance while maintaining the ink outflow property.

The color change temperature of the reversible thermochromic ink is appropriately set according to the purpose and the like. For example, in the case of using a reversible thermochromic ink decoloring by heating, the temperature decoloring by heating is preferably set to 25 ° C. to 95 ° C., and more preferably set to 36 ° C. to 90 ° C. More specifically, the high temperature side color change point [complete decolorization temperature (t4)] is set in the range of 25 ° C. to 95 ° C., preferably 36 ° C. to 90 ° C., the low temperature side color change point (T1)] can be set in the range of -30 ° C to + 20 ° C, preferably -30 ° C to + 10 ° C. With such a configuration, colors can be effectively maintained in a normal state (daily living temperature range), and the handwriting is heated, specifically, heating by frictional heat by a friction body 125 or the like described later. It can be easily erased.

In the present modification, a friction body is provided at the rear end of the rotating body 106. Particularly in the example shown in FIG. 30, the tail plug 125 is configured as a friction body. Along with this, the tail plug 125 is also referred to as a friction body 125 in this modification. The friction body 125 is fixed to the rotating body 106 so as not to rotate and to move back and forth. The friction body 125 is used, for example, to rub the handwriting by the ink composition for writing instrument 111 having thermochromism, and to change the color of the handwriting (discoloration) by the frictional heat generated at that time. The present invention is not limited to this, and the friction body 125 may be a friction body such as a sand eraser. The friction body 125 is made of, for example, an elastic material, and can be fixed to the rear end of the rotating body 106 by press fitting, engagement, screwing, fitting, adhesion, or two-color molding.

The pressure-sensitive writing instrument 201 of the present modification has a stopper member 170 disposed between the rotating body 106 and the piston 118. The stopper member 170 allows rotation of the rotating body 106 in a state in which the rear end of the shaft cylinder 104 is directed upward (FIG. 30), and in a state in which the rear end of the shaft cylinder 104 is directed downward (FIG. 34) It is a member having a function of preventing rotation of the moving body 106. Here, the lower side means the direction in which gravity acts, and the upper side means the direction opposite to the lower side, that is, the direction opposite to the direction in which gravity acts. Further, the state in which the rear end of the barrel 104 is directed upward refers to the state in which the rear end of the barrel 104 is positioned above the front end of the barrel 104 and the rear end of the barrel 104 is directed downward. In the closed state, the rear end of the barrel 104 is positioned lower than the front end of the barrel 104. Furthermore, to allow rotation of the rotating body 106 with the rear end of the shaft cylinder 104 directed upward, all the postures in which the rear end of the shaft cylinder 104 is positioned above the front end of the shaft cylinder 104 The rotating body 106 is not only one that allows rotation of the rotating body 106 in the state, but also is a part of the state in which the rear end of the barrel 104 is positioned above the front end of the barrel 104. Also includes those that allow the rotation of the Similarly, to prevent the rotation of the rotating body 106 with the rear end of the barrel 104 directed downward means that the rear end of the barrel 104 is positioned lower than the front end of the barrel 104. In the above state, the pivoting body 106 is not only one that impedes the pivoting of the pivoting body 106, but is also partially in a state in which the rear end of the barrel 104 is positioned lower than the front end of the barrel 104. Including those that prevent the rotation of the

In the example shown in FIGS. 30 and 32, the stopper member 170 is a main body portion 170a, a guided portion 170b located forward with respect to the main body portion 170a, and a projecting portion provided on the outer peripheral surface of the main body portion 170a. And 170c. The main body portion 170a has a substantially cylindrical shape. The guided portion 170 b linearly extends forward from the front side portion of the main portion 170 a. As shown in FIG. 31, in the cross section orthogonal to the extending direction of the guided portion 170b, the guided portion 170b has an outline of a substantially rectangular shape, in particular, a substantially square shape. Further, along the extending direction of the guided portion 170b, the cross section of the guided portion 170b has a contour of a fixed shape. That is, any two cross sections orthogonal to the extending direction of the guided portion 170 b in the guided portion 170 b have contours of the same shape.

The projecting portion 170 c is formed so as to project in the radial direction from the cylindrical outer peripheral surface of the main body portion 170 a. In the illustrated example, the protrusion 170 c extends linearly along the front-rear direction. Therefore, the extending direction of the guided portion 170b and the extending direction of the protrusion 170c are parallel to each other. The protrusions 170c are arranged at equal angular intervals in the circumferential direction. In the example shown in FIG. 35, the stopper member 170 has two protrusions 170c, and the protrusions 170c are arranged at an angular interval of 180 degrees. The invention is not limited thereto, and the stopper member 170 may have one protrusion 170 c or may have three or more protrusions 170 c.

The stopper member 170 has a through hole 170 d which penetrates the main body portion 170 a and the guided portion 170 b in the front-rear direction. The through hole 170 d is opened in each of the rear end surface of the main body portion 170 a and the front end surface of the guided portion 170 b. The through hole 170 d is not an essential component, and the stopper member 170 may not have the through hole 170 d. That is, the stopper member 170 may be configured as a solid member.

As shown in FIGS. 30 to 32, the piston 118 has a guide portion 118h for guiding the guided portion 170b of the stopper member 170 so as to be movable back and forth. The guide portion 118 h extends in the front-rear direction in the piston 118 and is formed as a hole that opens at the rear end surface of the piston 118. In a cross section orthogonal to the extending direction of the guide portion 118 h, the guide portion 118 h has an outline that has a shape that is complementary to the guided portion 170 b of the stopper member 170. That is, in the cross section orthogonal to the extending direction of the guide portion 118 h, the guide portion 118 h has an outline of a substantially rectangular shape, in particular, a substantially square shape. Thereby, the stopper member 170 is held so as to be movable forward and backward with respect to the piston 118 and non-rotatable. Further, along the extension direction of the guide portion 118 h, the cross section of the guide portion 118 h has a contour of a fixed shape. That is, any two cross sections orthogonal to the extending direction of the guide portion 118 h in the guide portion 118 h have contours of the same shape.

As shown in FIG. 33, on the inner peripheral surface of the rotating body 106, a restricting portion 106h that restricts the movement of the protruding portion 170c of the stopper member 170 is provided. The number of regulating portions 106 h is the same as the number of projecting portions 170 c of the stopper member 170. That is, in the present modification, two regulating portions 106h are provided at an angular interval of 180 degrees from each other along the circumferential direction of the rotating body 106. The illustrated restricting portion 106 h has a first groove 106 i and a plurality of second grooves 106 j located behind the first groove 106 i and in communication with the first groove 106 i. The first groove portion 106i linearly extends along the front-rear direction, and has a constant width along the circumferential direction of the rotating body 106. The second groove 106 j is provided corresponding to the number of the step 105 f of the first cam slope 105 e and the number of the steps 118 e of the second cam slope 118 d. That is, in the present modification, three second groove portions 106j are provided for one first groove portion 106i. Each second groove portion 106 j linearly extends in the front-rear direction, and is arranged in the circumferential direction of the rotating body 106. Each second groove portion 106 j has a constant width along the circumferential direction of the rotating body 106 at least in a predetermined range on the front side (the side close to the first groove portion 106 i). The width of the second groove 106j along the circumferential direction in the predetermined range is set to such a size that the projection 170c of the stopper member 170 can move back and forth smoothly in the second groove 106j. On the other hand, from the viewpoint of appropriately suppressing the rotation of the friction body 125 at the time of rubbing the handwriting using the friction body 125, the circumferential dimension of play that may be generated between the second groove 106j and the projection 170c is , Preferably as small as possible.

Next, with reference to FIGS. 34 and 35, a method of erasing the handwriting using the pressure-sensitive writing instrument 201 of the present modification will be described. FIG. 34 is a diagram showing a state in which the rear end of the pressure-sensitive writing instrument 201 is directed downward to erase the handwriting, and FIG. 35 corresponds to the line XXXV-XXXV in FIG. It is a figure shown in the cross section.

In the state where the rear end of the shaft cylinder 104 is directed upward as shown in FIG. 30, the stopper member 170 is located on the front side by the action of gravity. At this time, the front end of the main body portion 170 a of the stopper member 170 or the front end of the guided portion 170 b abuts on the piston 118, and at least the front side of the guided portion 170 b is in the guiding portion 118 h of the piston 118. To position. Further, the protrusion 170 c of the stopper member 170 is located in the first groove 106 i of the regulating portion 106 h of the rotating body 106. Therefore, the protrusion 170 c is movable along the circumferential direction within the range of the width of the first groove 106 i. That is, the pivoting body 106 is pivotable relative to the stopper member 170 and the piston 118 within the range of the width of the first groove portion 106i. Thereby, the stopper member 170 allows the pivoting of the pivoting body 106 in a state where the rear end of the barrel 104 is directed upward. Therefore, in a state where the rear end of the shaft cylinder 104 is directed upward, as described above with reference to FIGS. 27A to 27C, the pressing force adjustment mechanism 160 is operated by rotating the rotating body 106 to It becomes possible to adjust the pressure applied to the ink composition (ink) 111.

When rubbing the handwriting with the ink composition (ink) 111 for a writing tool using the friction body 125 and changing the color of the handwriting (erasing the color), the user sees the friction body 125 as shown in FIG. Face down. That is, the rear end of the barrel 104 is directed downward. Thereby, the stopper member 170 moves rearward by the action of gravity. At this time, the projecting portion 170c of the stopper member 170 enters one of the plurality of second groove portions 106j of the regulating portion 106h of the rotating body 106 (see FIG. 35). Specifically, the protrusion 170c enters the second groove 106j corresponding to the designated position (see FIG. 14) of the alignment marker 106f with respect to the pressing force display unit 102h. In other words, the protrusion 170c enters the second groove 106j corresponding to the fitting position of the first cam protrusion 106b with the steps 105f1 to 105f3 (see FIGS. 28A to 28C) of the first cam slope 105e. . In other words, the protrusion 170c enters the second groove 106j corresponding to the fitting position of the second cam protrusion 106d with the step 118e1 to 118e3 (see FIGS. 28A to 28C) of the second cam inclined surface 118d. Do. The width along the circumferential direction of the second groove portion 106 j is smaller than the width along the circumferential direction of the first groove portion 106 i, whereby the rotating body is in a state where the rear end of the barrel 104 is directed downward. Rotation of 106 is hindered. Therefore, when the rear end of the shaft cylinder 104 is directed downward and the protrusion 170c of the stopper member 170 enters one of the plurality of second grooves 106j of the restricting portion 106h, the rotating body 106 is turned. It becomes impossible to adjust the pressure applied to the ink composition (ink) 111 for writing instruments by moving it. That is, in this case, when rubbing the handwriting with the friction body 125, the rotary body 106 is rotated together with the friction body 125, and the pressure applied to the ink composition (ink) 111 for writing tool is changed regardless of the user's intention. It can prevent being done.

In the pressure-type writing instrument 201 of this modification, the ink composition (ink) 111 for a writing instrument is a thermochromic ink, is provided at the rear end of the rotating body 106, and rubs the handwriting of the thermochromic ink to When the rear end of the shaft cylinder 104 is directed upward, the rotary member 106 is allowed to rotate, and the rear end of the shaft cylinder 104 is directed downward. And a stopper member 170 that prevents the rotation of the rotating body 106 in the facing state.

According to such a pressure-sensitive writing instrument 201, in a state where the rear end of the barrel 104 is directed upward, the pressing force adjusting mechanism 160 is operated by turning the pivoting body 106, and the ink composition for writing instrument (ink It becomes possible to adjust the pressure force applied to 111). On the other hand, when the handwriting is erased by the friction member 125 with the rear end of the shaft cylinder 104 directed downward, the rotation of the rotating member 106 is prevented due to the friction of the handwriting by the friction member 125, a writing instrument The pressing force applied to the ink composition (ink) 111 can be prevented from being unintentionally changed.

Claims

An axial cylinder capable of internally accommodating a refill filled with the ink composition for writing instrument;
A pressure mechanism that applies pressure to the ink composition for writing instruments as the refill moves backward;
And a pressing force adjusting mechanism for adjusting the pressure.
It further comprises a rotating body provided to protrude from the rear end of the shaft cylinder,
The pressure type writing instrument according to claim 1, wherein the pressure adjustment mechanism adjusts the pressure by rotating the rotating body.
A ballpoint pen refill comprising an ink storage cylinder filled with the ink composition for writing tool and a ballpoint pen tip in the front portion of the ink storage cylinder in a shaft cylinder,
The pressure-sensitive writing instrument is a pressing mechanism provided with a pressing mechanism for applying pressure to the rear end of the ink composition for writing instruments, wherein the writing pressure is applied to the rear of the ball-point pen refills to retract the ballpoint refills.
A rotating body protruding from a rear end of the shaft cylinder and a pressing force adjusting mechanism operated by rotating the rotating body to adjust the amount of retraction of the ballpoint pen refill are provided at the rear of the pressing mechanism,
The pressure mechanism is non-rotatably locked to the shaft cylinder and is movable back and forth.
The rotating body is rotatably engaged with the shaft cylinder,
The pressure adjustment mechanism operates by rotating the rotating body, and adjusts the pressure applied to the rear end of the ink composition for writing tool in the ink storage cylinder, and before and after rotating the rotating body, A pressure-sensitive writing instrument, wherein the relative position of the ballpoint pen refill to the shaft cylinder in the axial direction is not changed.
Inside the shaft cylinder, a slide member which is non-rotatably and rotatably engaged with the shaft cylinder is disposed.
The slide member includes the pressing mechanism disposed inward of the slide member, and the rotating body disposed such that a portion thereof protrudes rearward from the rear end opening of the slide member. And
The pressure-sensitive writing instrument according to claim 3, wherein the front end portion of the ballpoint pen refill protrudes from the front end opening of the barrel by pressing the rotating body forward.
The pressing force adjusting mechanism includes the slide member, the rotating body inserted from the front end opening of the slide member and rotatably and longitudinally movably engaged with the slide member, and the inside of the rotating body And a sliding member rotatably and longitudinally movably engaged with the rotating body.
A first cam mechanism for moving the rotating body back and forth with respect to the sliding member between the slide member and the rotating body, and between the rotating body and the sliding member with respect to the rotating body The pressure type writing instrument according to claim 4, further comprising: a second cam mechanism for moving the sliding member back and forth.
The first cam mechanism is in sliding contact with the inner surface of the slide member with a first cam slope inclined with respect to the axial direction and extending in the axial direction, and with the outer surface of the rotating body with the first cam slope. And the first cam projection formed,
The second cam mechanism slides on an outer surface of the sliding member, a second cam slope inclined with respect to the axial direction and extending in an axial direction, and an inner surface of the rotating body with the second cam slope. The pressure-sensitive writing instrument according to claim 5, further comprising: a second cam protrusion formed to contact.
The pressure mechanism includes: a cylindrical body having a through hole penetrating in the front and back direction; an elastic member disposed inside the cylindrical body; and an elastic member on which a rear end portion of the ballpoint pen refill is detachably mounted; A pressure chamber formed between the inner wall of the member and the rear end of the ink storage cylinder and in communication with the rear end opening of the ink storage cylinder; and the inner side of the cylindrical body and the rear of the elastic member A stop provided and an air hole communicating the pressure chamber with the outside,
The cylindrical body is non-rotatably and rotatably engaged with the slide member, and the slide member is engaged with the cylindrical body so as to be movable back and forth.
By arranging a resilient member between the rear inner step of the cylindrical body and the front inner step of the sliding member, the cylindrical body is resiliently forwardly moved relative to the sliding member,
The elastic member and the stopper come in contact with each other to deform the elastic member by retracting the cylindrical body together with the ballpoint pen refill, and the pressure chamber compresses to thereby form the ink composition in the ink storage cylinder. The pressure-sensitive writing instrument according to claim 5 or 6, wherein pressure is applied to the rear end of the object.
A ballpoint pen refill comprising an ink storage cylinder filled with the ink composition for writing tool and a ballpoint pen tip in the front portion of the ink storage cylinder in a shaft cylinder,
The pressure-sensitive writing instrument is a pressing mechanism provided with a pressing mechanism for applying pressure to the rear end of the ink composition for writing instruments, wherein the writing pressure is applied to the rear of the ball-point pen refills to retract the ballpoint refills.
The pressurizing mechanism includes a cylinder formed in a cylindrical shape, an airtight valve having an airtight deformation portion on an outer peripheral surface and capable of moving back and forth relative to the cylinder, and back and forth movement in a rear inner hole of the cylinder A piston freely mounted, an airtight member disposed between the piston and the cylinder, the cylinder, the airtight valve, the piston, and the airtight member are surrounded and communicated with the rear portion of the ball pen refill A pressure chamber, and a resilient member disposed between the gas tight valve and the piston and springing the gas tight valve forward.
When writing pressure is applied to the front end of the ballpoint pen tip, the ballpoint pen refill retracts, and the cylinder and the airtight valve are engaged with the retraction of the ballpoint pen refill against the elastic force of the resilient member and the piston , And after closing the pressurizing chamber, it is compressed and pressurized, and when the writing pressure on the ballpoint pen refill is released, the airtight valve advances relative to the piston prior to the cylinder. Thus, an air passage communicating the pressure chamber with the outside is formed, and the pressure chamber is released from the airtight state to be at the same pressure as the atmospheric pressure, and thereafter the cylinder is advanced with a delay, a pressure type writing instrument .
When a pressure is applied to the front end of the ballpoint pen refill, the pressure-sensitive deformation portion of the gastight valve abuts on the contact portion of the cylinder so that the pressurizing chamber becomes airtight. When the writing pressure on the refill is released, the sealing member generates the fitting force generated between the sealing valve and the contact portion of the cylinder by the sealing deformation portion of the sealing valve and the piston and the cylinder The pressure-sensitive writing instrument according to claim 8, wherein the airtight valve is advanced relative to the piston prior to the cylinder by increasing the fitting force generated therebetween.
The pressure type writing instrument according to claim 8 or 9, further comprising a pressure adjustment mechanism that adjusts the pressure.
It further comprises a rotating body provided to protrude from the rear end of the shaft cylinder,
The pressure type writing instrument according to claim 10, wherein the pressure adjustment mechanism adjusts the pressure by rotating the rotating body.
The ink composition for a writing instrument is a thermochromic ink,
A friction body provided at the rear end of the rotating body, capable of rubbing the handwriting of the thermochromic ink and causing the handwriting to discolor by the frictional heat generated at that time;
A stopper member that allows rotation of the rotating body in a state in which the rear end of the shaft cylinder is directed upward, and prevents rotation of the rotating body in a state in which the rear end of the shaft cylinder is directed downward; The pressure-sensitive writing instrument according to any one of claims 2 to 7 and 11, further comprising: