JPWO2019026808A1 - Pressurized writing instrument - Google Patents

Abstract

[Problem] In a pressure-type writing instrument that can apply pressure to the rear end of ink in an ink containing cylinder by writing pressure, the pressure inside the ink containing cylinder is adjusted according to a user's preference by rotating a rotating body. (EN) A pressure-type writing instrument in which the amount of protrusion of the front end portion of a ball-point pen refill that protrudes from the tip of a barrel when the rotating body is rotated is kept constant. [Solution] In a pressure-type writing instrument (1), a shaft cylinder (4) capable of accommodating a refill (8) filled with an ink composition (11) for a writing instrument and a retreat of the refill (8). A pressure mechanism (7) for applying a pressure to the writing ink composition (11) and a pressure adjustment mechanism (24) for adjusting the pressure are provided.

Description

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

  Conventionally, as a pressurizing writing instrument of this kind, as disclosed in, for example, JP2000-335173A, a pressurizing mechanism is provided at the rear end portion of the ink containing tube, and the inside of the ink containing tube is applied in conjunction with the pressing operation of the knock body. A structure is known in which the amount of ink discharged from the tip of the writing 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 inside of the ink containing tube cannot be changed after the pressure mechanism is operated, so that the handwriting width or the handwriting width that suits the taste of the user is not always required. In some cases, the handwriting density was not achieved.

As a technique for solving this problem, JPH08-141482A discloses an applicator capable of arbitrarily adjusting the pressure applied to the rear end of the correction fluid in the fluid tank.
In the applicator of JPH08-141482A, the rotating body at the rear end of the shaft cylinder is rotated stepwise from the pressing start point of the tank pressing section at the inner end of the cylinder toward the pressing end point, whereby the pressing section at each stage is rotated. The rear end of the liquid tank is pushed forward of the barrel according to the height of the cylinder 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 at an arbitrary strength at the time of use, but it is necessary to adjust the pressurizing force by rotating the rotating body at each use. Even when the use is stopped, there is a risk that the liquid may leak from the liquid application port if the pressure is kept applied, and therefore it is necessary to rotate the rotary member to the original position before storing the liquid, which is troublesome.

On the other hand, JP2011-235612A discloses a so-called writing pressure pressurizing ballpoint pen in which a pressurizing mechanism is operated by the writing pressure at the time of writing to bring the inside of the writing liquid storage tube into a pressurized state.
The writing pressure pressurizing type ballpoint pen described in JP2011-235612A has a structure in which the pressing mechanism is actuated by retracting the ballpoint pen refill by writing pressure during writing to apply pressure to the trailing end of the ink. In order to adjust the pressure applied to the rear end of the ink at the time of pressurization such as 141482A, it is necessary to increase or decrease the width of the retraction of the ballpoint pen refill when the writing pressure is applied. It was difficult to make the length of the front end of the protrusion constant.
By the way, the gripping position of the ballpoint pen varies depending on the person, but the gripping position is often determined based on the position of the pen tip during writing. For this reason, the user must change the position of gripping the barrel according to the protruding length of the pen tip. In the case of being curved toward, there is a problem in that the grip feeling also changes when the grip position is changed.

  In the pressurizing writing instrument of JP2009-202513A, the pressurizing mechanism includes a cylinder having an air hole at the rear end that communicates the inside and the outside, and a sealing member made of a bottomed cylinder attached to the inner wall of the knocking body. The forward movement of the body presses the rear end of the cylinder against the bottomed inner wall of the sealing member to close the air hole of the cylinder. Further, the forward movement of the cylinder compresses the air in the closed cylinder, and the ink containing cylinder. It has a structure that applies pressure to the space at the rear end.

  In addition, in the case of a pressure-type writing instrument, it is generally necessary to return the compressed space to the original amount when releasing the pressurized state. For this reason, when releasing the pressurized space, if the pressure in the pressurized space reaches near atmospheric pressure due to ink consumption, etc., a negative pressure lower than atmospheric pressure will result, and the ink container The ink for writing instruments filled in the ink may move to the rear end side of the ink containing cylinder, causing ink backflow. As a measure against this, in the pressure-type writing instrument of JP2009-202513A, when the knock body is biased backward by the coil spring, and when the pressurized state of the pressure mechanism is released, the cylinder and the sealing member are sealed by the biasing force of the coil spring. After releasing the cylinder to open the air holes of the cylinder and making the inside of the cylinder and the rear end of the ink container the same pressure as the atmospheric pressure, when the cylinder retracts, the atmospheric pressure is higher than the atmospheric pressure when releasing the closed space. Has a structure that prevents a low negative pressure state.

  The writing pressure pressurizing type ballpoint pen described in JP2011-235612A described above is capable of applying a pressure to the trailing end of the ink by operating the pressurizing mechanism by retracting the ballpoint pen refill by the writing pressure during writing. At this time, the writing tip is repeatedly brought into contact with or separated from the paper surface or the like to switch between a pressurized state and a non-pressurized state. For this reason, if the ball-point pen refill is greatly retracted during writing, it becomes very difficult to write. Therefore, it is necessary to minimize the amount of retraction of the ball-point pen refill during writing. Therefore, unlike a knock-type pressurizing writing instrument such as JP2009-202513A, it is not possible to apply high pressure to the pressurizing chamber by moving the knocking body forward by a long stroke. Therefore, the pressure applied by the pressurizing mechanism is also knocked. It is smaller than the expression. In the writing pressure pressurization type, since the pressurization state of the pressurizing chamber is reset every time the writing tip is separated from the paper surface, the pressure that can be applied by one compression is low, but the pressurization is almost constant. There is an advantage that you can write while keeping the state.

  However, in the structure of JP2011-235612A, the pressurizing state of the pressurizing chamber is reset for each writing, and the pressure applied by one operation is also reduced. Although it is extremely small, compared with a knock type pressure writing instrument such as JP2009-202513A, the number of times the pressure state is reset during writing is overwhelmingly large, so air is blown from the tip of the writing with a ballpoint pen refill. There is a risk that the ink will easily get caught in the inside, and eventually the ink will flow back and become incapable of writing.

  The present invention has been made in view of the above problems, and in a pressure-type writing instrument that can apply pressure to the ink rear end in the ink containing cylinder by writing pressure, the ink containing cylinder by rotating the rotating body. The pressure can be adjusted according to the preference of the user, and the amount of protrusion of the front end of the ball-point pen refill that protrudes from the tip of the barrel when the rotating body is rotated can be kept constant. The first purpose is to provide

  Further, the present invention, in a pressure-type writing instrument that can apply pressure to the ink trailing end in the ink containing cylinder by writing pressure, separates the writing tip portion from the writing surface during writing and pressurizes the trailing end of the ink. It is a second object of the present invention to provide a pressure-type writing instrument which, when released, prevents the atmospheric pressure in the pressurizing chamber from becoming a negative pressure state lower than the atmospheric pressure and prevents the backflow of ink.

The pressure-type writing instrument of the present invention,
A barrel capable of containing a refill filled with an ink composition for a writing instrument,
A pressurizing mechanism for applying pressure to the ink composition for a writing instrument as the refill recedes,
A pressing force adjusting mechanism for adjusting the pressure.

In the pressure-type writing instrument of the present invention,
Further comprising a rotating body provided so as to project from the rear end of the shaft cylinder,
The pressing force adjusting mechanism may adjust the pressure by rotating the rotating body.

The pressure-type writing instrument of the present invention,
A ball-point pen refill including an ink containing cylinder filled with an ink composition for a writing instrument and a ball-point pen tip in a front portion of the ink containing cylinder is housed in a shaft cylinder,
Behind the ball-point pen refill, the ball-point pen refill is retracted by applying a writing pressure, a pressure-type writing instrument provided with a pressure mechanism for applying pressure to the rear end of the ink composition for a writing instrument,
Behind the pressurizing mechanism, a rotating body protruding from the rear end of the barrel and a pressing force adjusting mechanism which is operated by rotating the rotating body to adjust the retracted amount of the ball-point pen refill are provided. The pressurizing mechanism is locked to the shaft cylinder so as not to rotate and to move back and forth,
The rotating body is rotatably locked to the barrel,
The pressing force adjusting mechanism operates by rotating the rotating body, adjusts the pressure applied to the rear end of the ink composition for a writing instrument in the ink containing cylinder, and before and after rotating the rotating body, The relative position of the ball-point pen refill with respect to the barrel 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 that is fixed to the shaft cylinder so as not to rotate and to move back and forth is disposed.
The slide member includes the pressing mechanism arranged inside the slide member, and the rotating body arranged so that a part of the slide member protrudes rearward from a rear end opening of the slide member. Then
The front end portion of the ball-point pen refill may be configured to protrude from the front end opening portion 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 that is inserted from a front end opening of the slide member, and is rotatably and longitudinally locked to the slide member, and the inside of the rotating body. And a sliding member locked to the rotary body so as to be rotatable and movable back and forth,
A first cam mechanism for moving the rotating body back and forth with respect to the slide member between the slide member and the rotating body; and a rotating body for the rotating body between the rotating body and the sliding member. 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, a first cam slant surface that is inclined with respect to the axial direction and extends in the axial circumferential direction, and an outer surface of the rotating body with the first cam slant surface. And a first cam protrusion formed as described above,
The second cam mechanism includes a second cam slant surface inclined to the axial direction and extending in the axial circumferential direction on the outer surface of the sliding member, and a second cam slant surface slidable on the inner surface of the rotating body. A second cam projection formed to contact.

In the pressure-type writing instrument of the present invention,
The pressurizing mechanism includes a tubular body having a through hole penetrating in the front-rear direction, an elastic member disposed inside the tubular body, and having a rear end portion of the ball-point pen refill detachably attached thereto, and the elastic member. A pressure chamber that is formed between the inner wall of the member and the rear end of the ink containing cylinder and communicates with the rear end opening of the ink containing cylinder, and is arranged inside the tubular body and behind the elastic member. A stopper provided, and an air hole for communicating the pressurizing chamber with the outside,
The tubular body is locked to the slide member so as not to be rotatable and movable back and forth, and the sliding member is locked to the cylinder so as to be movable back and forth and not rotatable.
By disposing an elastic member between the rear inner step portion of the tubular body and the front inner step portion of the sliding member, the tubular body is elastically bulged forward with respect to the sliding member,
By retracting the tubular body together with the ball-point pen refill, the elastic member and the stopper come into contact with each other to deform the elastic member, and the pressurizing chamber compresses to cause the ink in the ink containing cylinder Pressure may be applied to the ends.

  According to the present invention, in the pressure-type writing instrument capable of applying pressure to the ink rear end in the ink containing cylinder by the writing pressure, the inside of the ink containing cylinder is applied according to the preference of the user by rotating the rotating body. It is possible to provide a pressure-type writing instrument in which the pressure can be adjusted and the amount of protrusion of the front end portion of the ball-point pen refill that protrudes from the tip of the barrel when the rotating body is rotated is kept constant.

The pressure-type writing instrument of the present invention,
A ball-point pen refill including an ink containing cylinder filled with an ink composition for a writing instrument and a ball-point pen tip in a front portion of the ink containing cylinder is housed in a shaft cylinder,
Behind the ball-point pen refill, the ball-point pen refill is retracted by applying a writing pressure, a pressure-type writing instrument provided with a pressure mechanism for applying pressure to the rear end of the writing instrument ink composition,
The pressurizing mechanism has a cylindrical cylinder, an airtight valve that has an airtight deforming portion on the outer peripheral surface and is movable back and forth with respect to the cylinder, and a back and forth movement in a rear inner hole of the cylinder. A freely mounted piston, an airtight member disposed between the piston and the cylinder, surrounded by the cylinder, the airtight valve, the piston and the airtight member, and communicated with a rear portion of the ballpoint pen refill. A pressurizing chamber, and an elastic member that is disposed between the airtight valve and the piston and elastically springs the airtight valve forward,
When writing pressure is applied to the front end of the ball-point pen tip, the ball-point pen refill retracts, and in conjunction with the retraction of the ball-point pen refill, the cylinder and the airtight valve resist the elastic force of the elastic member and the piston. When the writing pressure on the ball-point pen refill is released, the airtight valve moves forward with respect to the piston, while the air-tight valve is retracted, and the pressure chamber is closed and then compressed and pressurized. As a result, an air passage communicating between the pressurizing chamber and the outside is formed, the airtight state of the pressurizing chamber is released and the pressure becomes equal to the atmospheric pressure, and then the cylinder is advanced with a delay.

In the pressure-type writing instrument of the present invention,
When writing pressure is applied to the front end of the ball-point pen refill, the air-tightness deforming portion of the air-tight valve and the abutting portion of the cylinder come into contact with each other so that the pressure chamber becomes air-tight. When the writing pressure on the refill is released, the fitting force generated between the airtight valve and the contact portion of the cylinder by the airtight deforming portion of the airtight valve causes the piston and the cylinder to be separated from each other by the airtight member. The airtight valve may be configured to advance with respect to the piston before the cylinder by increasing a fitting force generated therebetween.

  According to the present invention, in the pressure-type writing instrument capable of applying pressure to the ink trailing end in the ink containing cylinder by the writing pressure, the tip end portion of the ballpoint pen tip is separated from the writing surface, and the pressure applied to the trailing end of the ink is changed. It is possible to provide a pressure-type writing instrument capable of preventing the negative pressure state in which the pressure inside the pressure chamber becomes lower than the atmospheric pressure when the pressure is released and preventing the backflow of ink.

In the pressure-type writing instrument of the present invention,
A pressing force adjusting mechanism for adjusting the pressure may be further provided.

In the pressure-type writing instrument of the present invention,
Further comprising a rotating body provided so as to project from the rear end of the shaft cylinder,
The pressing force adjusting mechanism may adjust the pressure by rotating the rotating body.

In the pressure-type writing instrument of the present invention,
The writing ink composition 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 discoloring the handwriting by frictional heat generated at that time,
A stopper member that allows rotation of the rotating body when the rear end of the shaft cylinder is directed upward, and prevents rotation of the rotating body when the rear end of the shaft cylinder is directed downward. It may be further provided.

FIG. 1 is a vertical cross-sectional view of a pressure-type writing instrument according to the first embodiment. FIG. 2 is an enlarged vertical sectional view in which a 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 sectional view taken along line IV-IV in FIG. FIG. 5 is an enlarged sectional view taken along line VV in FIG. FIG. 6 is a vertical cross-sectional view showing a knocked state in which the rotary body is pressed from the state of FIG. FIG. 7 is an explanatory diagram showing a state when writing with the pressure-type writing instrument of FIG. 6. FIG. 8 is an explanatory diagram showing a state in which writing pressure is applied along the axis from the state of FIG. 7. FIG. 9A is an explanatory diagram showing the operation of the pressure-type writing instrument when a writing pressure is applied, and shows a state before the writing pressure is applied. FIG. 9B is an explanatory diagram showing the operation of the pressure-type writing instrument when writing pressure is applied, and shows a state in which the pressing space is airtight by applying writing pressure. FIG. 9C is an explanatory diagram showing the operation of the pressure-type writing instrument when a writing pressure is applied, and shows a state where the writing space is pressed by applying the writing pressure. FIG. 10A is an explanatory diagram showing an operation when the rotating body of the pressure-type writing instrument is rotated, and shows a state in which the pressing force is set high. FIG. 10B is an explanatory diagram showing an operation when the rotating body of the pressure-type writing instrument is rotated, and shows a state in which the pressing force is set low. FIG. 10C is an explanatory diagram showing an operation when the rotating body of the pressure-type writing instrument is rotated, and shows a state in which the pressing force is set so as not to be applied. FIG. 11A is an explanatory view for explaining the fitting state of the cam of the first pressing mechanism when the rotating body of the pressure-type writing instrument is rotated, and the fitting state of the cam in the pressure-type writing instrument 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 the rotating body of the pressure-type writing instrument is rotated, and the fitting state of the cam in the pressure-type writing instrument 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 the rotating body of the pressure-type writing instrument is rotated, and the fitting state of the cam in the pressure-type writing instrument shown in FIG. 10C. Is shown. FIG. 12A is an explanatory diagram for explaining the fitting state of the cam of the second pressing mechanism when the rotating body of the pressure-type writing instrument is rotated, and the fitting state of the cam in the pressure-type writing instrument shown in FIG. 10A. Is shown. FIG. 12B is an explanatory diagram for explaining the fitting state of the cam of the second pressing mechanism when the rotating body of the pressing writing tool is rotated, and the fitting state of the cam in the pressing writing tool shown in FIG. 10B. Is shown. FIG. 12C is an explanatory view for explaining the fitting state of the cam of the second pressing mechanism when the rotating body of the pressure-type writing instrument is rotated, and the fitting state of the cam in the pressure-type writing instrument shown in FIG. 10C. Is shown. FIG. 13 is a side view showing a modified example of the pressure-type writing instrument of the first embodiment. FIG. 14 is an external view of a pressure-type writing instrument according to the second embodiment. FIG. 15 is a vertical cross-sectional view of the pressure-type writing instrument of the second embodiment. FIG. 16 is an enlarged vertical sectional view in which a main part of FIG. 15 is enlarged. FIG. 17 is an exploded view for explaining the pressurizing mechanism and the pressurizing force adjusting mechanism of the second embodiment. 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. 20 is a vertical cross-sectional view showing a knocked 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. 22 is an explanatory diagram showing a state in which writing pressure is applied along the axis from the state of FIG. FIG. 23 is an enlarged vertical sectional view in which a main part of FIG. 21 is enlarged. FIG. 24 is an enlarged vertical cross-sectional view showing a state in which writing pressure is applied from the state of FIG. FIG. 25 is an enlarged vertical sectional view showing a state where the writing pressure is applied from the state of FIG. 24 to the end. FIG. 26 is an enlarged vertical cross-sectional view showing a state where the writing pressure is released from the state of FIG. 25 and an air passage is formed. FIG. 27A is an explanatory diagram showing an operation when the rotating body of the pressure-type writing instrument is rotated in the second embodiment, and shows a state in which the pressing force is set high. FIG. 27B is an explanatory diagram showing an operation when the rotating body of the pressure-type writing instrument is rotated in the second embodiment, and shows a state in which the pressing force is set low. FIG. 27C is an explanatory view showing an operation when the rotating body of the pressure-type writing instrument is rotated in the second embodiment, and shows a state in which the pressing force is set so as not to be applied. FIG. 28A is an explanatory diagram for explaining the fitting state of the cam of the first cam mechanism when the rotating body of the pressure-type writing instrument is rotated in the second embodiment, and the cam in the pressure-type writing instrument shown in FIG. 27A. The fitting state of is shown. FIG. 28B is an explanatory view for explaining the fitting state of the cam of the first cam mechanism when the rotating body of the pressure-type writing instrument in the second embodiment is rotated, and the cam in the pressure-type writing instrument shown in FIG. 27B. The fitting state of is shown. FIG. 28C is an explanatory view for explaining the fitting state of the cam of the first cam mechanism when the rotating body of the pressure-type writing instrument is rotated in the second embodiment, and the cam in the pressure-type writing instrument shown in FIG. 27C. The fitting state of is shown. FIG. 29A is an explanatory view for explaining the fitting state of the cam of the second cam mechanism when the rotating body of the pressure-type writing instrument in the second embodiment is rotated, and the cam in the pressure-type writing instrument shown in FIG. 27A. The fitting state of is shown. FIG. 29B is an explanatory view for explaining the fitting state of the cam of the second cam mechanism when the rotating body of the pressure-type writing instrument is rotated in the second embodiment, and the cam in the pressure-type writing instrument shown in FIG. 27B. The fitting state of is shown. FIG. 29C is an explanatory diagram for explaining the fitting state of the cam of the second cam mechanism when the rotating body of the pressure-type writing instrument in the second embodiment is rotated, and the cam in the pressure-type writing instrument shown in FIG. 27C. The fitting state of is shown. FIG. 30 is a partial vertical cross-sectional view showing a modified example of the pressure-type writing instrument according to the second embodiment. 31 is a diagram showing the pressure-type writing instrument in a cross section corresponding to line XXXI-XXXI in FIG. 30. FIG. 32 is an exploded view showing each part constituting the pressurizing mechanism and the pressurizing force adjusting mechanism of the pressurizing writing instrument of FIG. 30. FIG. 33 is a vertical cross-sectional view showing the rotating body of FIG. 30 in an enlarged manner. FIG. 34 is a diagram for explaining a method of erasing a handwriting by using the pressure-type writing instrument of FIG. FIG. 35 is a view showing the pressure-type writing instrument in a cross section corresponding to the line XXXV-XXXV in FIG. 34.

Next, the pressure-type 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 barrel may be expressed as the front-back direction. Further, the movement in the front-back direction may be expressed as the front-back movement. Further, in the axial direction of the barrel, the one with the ballpoint pen refill is expressed as the inside and the opposite side is expressed as the outside.
In order to make the description easy to understand, the same members and similar parts in the drawings are denoted by the same reference numerals.

[First Embodiment]
The pressure-type writing instrument 1 of the present embodiment includes a barrel 4, a pressure mechanism 7, and a pressing force adjusting mechanism 24. The barrel 4 is configured to be able to accommodate the refill 8 filled with the ink 11 which is the 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 projects from the front end opening 3a of the shaft cylinder 4, and a non-writing state in which the front end of the refill 8 is recessed from the front end opening 3a of the shaft cylinder 4. It is configured to be switchable. In the pressure-type writing instrument 1 shown in FIGS. 1 to 5, the front cylinder 3 is screwed in front of the rear shaft 2 to form the shaft cylinder 4, and the shaft cylinder 4 is arranged so as to be movable back and forth. The slide member 5, the rotating body 6 rotatably locked to the slide member 5, the pressurizing mechanism 7 disposed in the slide member 5, and the shaft cylinder 4 attached to the pressurizing mechanism 7. Is composed of a refill (ball-point pen refill) 8 that can slide back and forth and a clip 9 that is rotatably locked to the side surface of the rear shaft 2.

The ball-point pen refill 8 includes a transparent ink container 10 made of PP resin, an ink 11 which is an ink composition for a writing instrument, and a grease-like ink follower 12 which follows the rear end of the ink 11 as the ink is consumed. The rear end opening of the ink containing cylinder 10 is directly accommodated and the rear end of the ball pen tip 13 having a ball (φ0.38 mm) rotatably held therein is press-fitted into the front end opening of the ink containing cylinder 10. It is obtained by press-fitting a cylindrical tail plug 14 into.
The tail plug 14 has a through hole penetrating therethrough in the front-rear direction and a mounting portion 14a provided with a step portion at the rear portion.

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

The rear shaft 2 (shaft cylinder 4) is formed in a cylindrical shape, and as shown in FIG. 2, a side hole 2b is formed on the outer surface 2a so as to extend along the axial direction and penetrate to the inner hole. Further, a clip locking portion 2c protruding outward is formed on the outer side surface 2a, and the clip locking portion 2c is constituted by a clip locking projection 2d and a spring locking projection 2e. A locking hole 2f is formed in the clip locking projection 2d in a direction orthogonal to the axial direction.
A locking rail portion 2g is formed on the inner peripheral surface of the rear portion of the rear shaft 2 so as to project inward and extend in the front-rear direction.

As shown in FIGS. 2 to 4, the slide member 5 is formed with a hooking portion 5a protruding outward on the outer peripheral portion, and the hooking portion 5a is arranged in the side hole 2b of the rear shaft 2. There is. Further, a locking groove 5d extending along the axial direction is formed on the rear outer surface of the slide member 5, and by mounting the locking groove 5d on the locking rail portion 2g of the rear shaft 2, the rear shaft 2 On the other hand, the slide member 5 is locked so that it can slide back and forth and cannot rotate.
Further, a front inner projection 5b protruding inward is formed in the front inner hole of the slide member 5, and an inner step portion 5c having a small inner diameter is formed in the rear portion of the slide member 5. Has been formed.

  Further, a slit portion 5e extending rearward from the front end is formed on the side surface of the slide member 5, and the slit portions 5e are formed at two symmetrical positions with the axial center sandwiched therebetween. Further, a first cam slope 5f is formed on the inner surface of the slide member 5 so as to be inclined along the circumferential direction of the shaft and protrudes inward. A plurality of first cam slopes 5f are formed on the first cam slope 5f. A step portion 5g is formed. In addition, each of the plurality of step portions 5g has a concave portion 5h formed in a concave shape toward the rear.

A cylindrical spacer ring 15 is disposed in front of the slide member 5, and a rear stage portion 15a is formed in the rear portion of the spacer ring 15. Further, the spacer ring 15 is non-detachably attached to the slide member 5 by press-fitting the front inner projection 5b of the slide member 5 into the rear stage portion 15a.
Further, as shown in FIG. 1, a knock coil spring 16 is stretched in a compressed state between an inner step portion 3b formed on the inner surface of the front shaft 3 (shaft cylinder 4) and the front end portion 15b of the spacer ring 15. As a result, the slide member 5 is elastically bulged rearward with respect to the front shaft 3 (shaft cylinder 4) via the spacer ring 15.

As shown in FIGS. 1, 2, 4 and 5, the clip 9 has a spring locking projection 2e of the rear shaft 2 and an inner wall portion of the clip 9 formed so as to project toward the shaft cylinder 4 side. By disposing the clip spring 17 between the projection 9a and the locking shaft 9b formed on the inner wall of the clip 9 in the locking hole 2f, the front end of the clip 9 is moved to the rear shaft 2. It is stretched on the outer wall side of the so as to be always elastic. Further, by pressing the rear end of the clip 9 (in the direction of arrow G in FIG. 2), the locking shaft R between the clip 9 and the rear shaft 2 is used as a fulcrum, and the front end of the clip 9 is used as the outer wall surface of the rear shaft 2. It is configured as a movable clip that can be separated from.
The front portion of the clip 9 is formed with a hooked portion 5c extending from the base portion 9d to the shaft cylinder 4 side and hooked with a hooking portion 5a formed on the side surface of the slide member 5.

The pressure mechanism 7 is a mechanism that applies pressure to the ink 11 as the refill 8 retracts. As shown in FIGS. 1 to 3, the pressurizing mechanism 7 is formed behind the ball-point pen refill 8 and inside the slide member 5 so as to be movable back and forth with respect to the slide member 5, and is formed in a cylindrical shape. Cylindrical body 18, stopper 19 mounted to be movable back and forth with respect to tubular body 18, press-fitted to the inner peripheral portion of tubular body 18, and detachable to the rear end portion of ball-point pen refill 8. The elastic member 20 mounted on the elastic member 20 and a pressurizing space (pressurizing chamber) 21 formed inside the elastic member 20 and communicating with the rear inner hole 8a of the ball-point pen refill 8.
Further, the pressurizing mechanism 7 is configured such that the front end of the tubular body 18 abuts on the rear end of the spacer ring 15 to restrict the forward movement of the pressurizing mechanism 7.

The tubular body 18 will be described in detail. As shown in FIGS. 2 and 3, the tubular body 18 is provided with a through hole 18a penetrating in the front-rear direction and having a plurality of stepped portions, and the outer peripheral portion is outwardly provided. A locking protrusion 18b is formed so as to protrude toward the outside. Further, the cylindrical body 18 has an outer step portion 18c formed on the outer peripheral portion thereof, and the outer diameter of the rear portion is smaller than that of the front portion.
Further, at the rear end of the tubular body 18, rear end projections 18d protruding toward the rear side are formed at two positions with the axial center interposed therebetween.
As shown in FIG. 5, the locking projection 18b of the tubular body 18 is inserted into the slit portion 5e formed on the side surface of the slide member 5, whereby the tubular body 18 is rotated with respect to the slide member 5. It is immovable and locked so that it can move back and forth.

The stopper 19 will be described in detail. As shown in FIG. 1 to FIG. 3 and FIG. 5, the stopper 19 has a collar portion 19a formed at the front end portion, and projects outward toward the rear end portion. Two locking portions 19b are formed. Further, a slit 19c extending from the rear end toward the front is formed between the two locking portions 19b.
When the stopper 19 is attached to the tubular body 18, the collar portion 19a comes into contact with the inner stage formed in the through hole 18a of the tubular body 18, whereby the rearward movement is restricted, and the stopper 19a is further attached. A plurality of groove-shaped air passages 19e extending in the axial direction are evenly arranged along the circumferential direction on the side surface of the shaft 19. 18f and the rear hole portion 18g are configured so as to always maintain a vented state.

The elastic member 20 will be described in detail. As shown in FIGS. 2 and 3, the elastic member 20 is made of nitrile rubber, and the elastic member 20 has an inner hole 20a penetrating forward and backward.
The elastic member 20 is press-fitted into the front inner surface 18h of the through hole 18a of the tubular body 18, and the front inner peripheral portion 20b of the inner hole 20a has a mounting portion 14a for the tail plug 14 of the ballpoint pen refill 8. Is detachably attached.
When the elastic member 20 is press-fitted onto the front inner surface 18h, a gap is formed between the rear end of the elastic member 20 and the front end surface 19d of the stopper 19, and the ball-point pen refill 8 is provided. The gap is maintained except when the writing pressure is applied to.

Further, the above-mentioned pressurizing space (pressurizing chamber) 21 is formed inside the elastic member 20, and the pressurizing space 21 communicates with the rear inner hole 8 a of the ballpoint pen refill 8.
Further, the pressurizing space 21 is communicated with the middle hole portion 18f of the cylindrical body 18 by the air hole 20c formed at the rear portion of the inner hole 20a, and the middle hole portion 18f is communicated with the outside through the rear hole portion 18g by the air passage 19e. Therefore, the pressurizing space 21 is communicated with the outside.

A sliding member 22 is provided behind the tubular body 18, and a second cam slope 22a is formed on the side surface of the sliding member 22. Further, a plurality of step portions 22b are formed on the second cam slope 22a, and a plurality of step portions 22b are each formed with a concave portion 22c which is formed in a concave shape toward the front.
Further, a front end concave portion 22d is formed in the front portion of the sliding member 22 so as to be cut out rearward in a slit shape and formed at two positions with the axis interposed therebetween. The rear end convex portion of the tubular body 18 is formed. By inserting 18d into the front end concave portion 22d of the sliding member 22, the sliding member 22 is locked to the tubular body 18 so as to be movable back and forth and not rotatable.

Further, by inserting the stopper 19 into the inner hole of the sliding member 22 from the front direction and locking the engaging portion 19b of the stopper 19 so as to project rearward from the rear end of the sliding member 22, The stopper 19 and the sliding member 22 are non-detachably fixed.
Incidentally, when the stopper 19 is inserted into the sliding member 22, the two locking portions 19b are bent by the slit 19c so as to be closer to the axial center side, so that the stopper 19 can be easily inserted into the inner hole.

  A pressing coil spring 23 is stretched between the rear inner step portion 18e of the tubular body 18 and the front inner step portion 22e of the sliding member 22. On the other hand, the tubular body 18 is elastically bulged forward.

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 projects rearward from the rear opening of the slide member 5. Is attached.
Further, as shown in FIG. 3, the rotating body 6 is formed with a plurality of groove portions 6a along the axis on the outer peripheral surface of the rear portion, and the groove portions 6a prevent the rotating body 6 from slipping when grasped with a finger. There is.
Further, a convex portion 6b is formed in the front of the groove portion 6a so as to project outward and is inclined so that the outer diameter increases from the rear to the front, and when the rotating body 6 is mounted on the slide member 5. The convex portion 6b is configured to prevent the rotating body 6 from coming off the slide member 5.

The rotating body 6 has a first cam projection 6d extending rearward from the front outer peripheral surface 6c and a second cam projection 6f extending forward from the rear inner peripheral surface 6e. And are formed.
The first cam mechanism 30 is configured by cam-fitting the first cam projection 6d of the rotating body 6 and the first cam slope 5f of the slide member 5, and the second cam projection of the rotating body 6 is formed. The second cam mechanism 40 is configured by cam-fitting the 6f and the second cam slope 22a of the sliding member 22.

  Here, by the slide member 5, the rotating body 6, and the sliding member 22, by rotating the rotating body 6, the pressurizing space 21 is compressed and the pressure applied by the pressurizing mechanism 24 can be changed. Is configured.

Next, a state will be described in which the ball-point pen tip 13 which is the writing tip of the ball-point pen refill 8 is pushed and retracted from the front-end opening 3a of the front shaft 3 by pressing (knocking) the rotating body 6 forward.
When the rotating body 6 is pressed forward from the state of FIG. 1 (direction of arrow F in FIG. 1), the rotating 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-fitted to the slide member 5 advance together with the rotating body 6 against the elastic force of the knock coil spring 16. At the same time, since the rotating body 6 is cam-fitted to the sliding member 22, the sliding member 22 is pressed forward, and the sliding member 22 moves forward, so that the pressing coil spring 23 elastically repels the cylindrical member. The body 18 advances. Then, as the tubular body 18 advances, the ball-point pen refill 8 is pushed forward through the elastic member 20 and moves forward, and the front end portion of the ball-point pen tip 13 projects from the front-end opening portion 3a of the front shaft 3. At that time, the hooking portion 5a of the slide member 5 hooks on the hooked portion 9c at the tip of the clip 9 arranged on the side surface of the rear shaft 2, thereby causing the front end of the ballpoint pen tip 13 to move to the front shaft 3 ( The state of FIG. 6 is maintained in which the state of protruding from the front end opening 3a of the shaft cylinder 4) is maintained.

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

Next, in the present embodiment, a state in which the rear end of the ink 11 in the ballpoint pen refill 8 is pressed by the writing pressure during 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, the barrel 4 is tilted and held as shown in FIG. When the ball-point pen refill 8 is retracted in the direction of arrow H in FIG. 7, the slide member 5 cannot be retracted because the latching portion is locked by the latched portion 9c of the clip 9, and the rotating body 6 Cannot move backward because it is cam-fitted to the slide member 5, and cannot move backward because the sliding member 22 is cam-fitted to the rotating body 6, so that the elastic force of the coil spring 23 for pressurization The tubular body 18 retracts together with the elastic member 20 against the force. When the rear end of the elastic member 20 comes into contact with the front end surface 19d of the stopper 19 that is stopped by the sliding member 22, the air hole 20c is closed by the front end surface 19d, and the pressurizing space 21 is closed. It becomes the state of FIG. 9B which is hermetically sealed. Further, when the ball-point pen refill 8 retracts and the tubular body 18 recedes, the elastic member 20 elastically deforms to compress the pressure space 21 as shown in FIG. The state shown in FIG. 8 is where pressure is applied through the ink follower 12. That is, as the ball-point pen refill 8 retracts, pressure is applied to the rear end of the ink 11 by the pressure mechanism 7.
The retreat of the ball-point pen refill 8 in the direction of the arrow H due to the writing pressure is stopped by the outer step portion 18c of the tubular body 18 contacting the front end 6g of the rotating body 6. That is, the length of the ball-point pen refill 8 that can be retracted can be determined by the size of the gap between the outer step portion 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) due to 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 surface 19d of the stopper 19, the air hole 20c is opened, and the pressure space 21 and the rear inner hole 8c of the ballpoint pen refill 8 are released from the atmospheric pressure. The pressure becomes the same, and the state returns to the state of FIG. 7.

Next, in the knocked state of FIG. 6, the operation of adjusting the pressing force applied to the ink 11 by rotating the rotating body 6 with respect to the rear shaft 2 to operate the pressing force adjusting mechanism 24 will be described.
When the rotating body 6 is rotated leftward (counterclockwise) when viewed from the rear end side in the state of FIG. 10A to be in the state of FIG. 10B, the slide member 5 is locked to the rear shaft 2 so as not to rotate. Therefore, as shown in FIGS. 11A and 11B, the first cam projection 6d of the rotating body 6 moves from the first step portion 5g1 to the adjacent second step portion 5g2 along the first cam slope. At this time, the rotating body 6 moves forward with respect to the slide member 5 by the amount of L1 in which the first cam projection 6d has moved one step (see FIG. 11A), and at the same time, the sliding spring is elastically urged backward by the coil spring 23 for pressure application. The moving member also advances by L1.
The sliding member 22 is non-rotatably locked to the tubular body 18, and the tubular body 18 is non-rotatably locked to the slide member 5. 4A, the second cam projection 6f of the rotating body 6 does not move to the second cam slope 22a of the sliding member 22 as shown in FIGS. 12A to 12B as the rotating body 6 rotates. Along the first step portion 22b1, it moves to the adjacent second step portion 22b2. At this time, the sliding member 22 retracts with respect to the rotating body 6 by the amount of M1 in which the second cam protrusion 6f has moved one step (see FIG. 12A). Therefore, the sliding member 22 moves forward by L1 by the first cam mechanism 30 and moves backward by M1 by the second cam mechanism 40. Further, in the present embodiment, since the configuration is such that L1=M1, only the rotating body 6 advances by L1 with respect to the shaft cylinder 4, and the relative position of the sliding member 22 with respect to the shaft cylinder 4 changes. do not do. Further, since the position of the sliding member 22 does not change, the position of the tubular body 18 elastically bulged forward by the pressurizing coil spring 23 does not change, and is fixed to the tubular body 18 via the elastic member 20. The relative position of the ball-point pen refill 8 with respect to the barrel 4 does not change. For this reason, the gap between the outer step portion 18c of the cylindrical body 18 and the front end 6g of the rotating body 6 is shortened by L1 which the rotating body has moved forward, and therefore the length by which the ballpoint pen refill 8 can retract when the writing pressure is applied is also L1. Decrease. 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 pressurizing space 21 is reduced, and as a result, the rotating body 6 is rotated to the left by one step, so that the ink in the ballpoint pen refill 8 is reduced. The pressure applied to the rear end of 11 can be reduced.

Further, from the state shown in FIG. 10B, the rotating body 6 is further rotated leftward (counterclockwise) when viewed from the rear end side to move the first cam protrusion 6d along the first cam slope 5f of the slide member 5. By setting the state of FIG. 10C, the first cam mechanism 30 causes the first cam projection 6d of the rotating body 6 to move from the second step 5g2 to the adjacent third step 5g3 as shown in FIGS. 11B to 11C. The second cam mechanism 40 moves the second cam projection 6f of the rotating body 6 from the second step portion 22b2 to the adjacent third step portion 22b3 as shown in FIGS. 12B to 12C. At this time, since the moving amount L2 of the first cam protrusion and the moving amount M2 of the second cam protrusion are the same, the sliding member 22 does not move, and only the rotating body 6 moves forward by M2 with respect to the tubular body 18. Then, the front end 6i of the rotating body 6 comes into contact with the outer step portion 18c of the tubular body 18.
In this state, since the tubular body 18 cannot be retracted by the rotating body 6, the ball-point pen refill 8 cannot be retracted either, and the ink 11 is not pressed even if a writing pressure is applied during writing, It can be used as a non-pressurized writing instrument, and since the inside of the ballpoint pen refill 8 is not pressurized even if it is stored in this state, the ink from the tip of the ballpoint pen tip 11 can be stored at the time of storage. Can be prevented from flowing out.
Although not described in detail, in the present embodiment, the setting of the pressure applied to the ink 11 at the time of writing can be changed by rotating the rotating body 6 even when not knocking as in knocking.

  As described above, in the pressure-type writing instrument 1 of the present embodiment, by rotating the rotating body 6, the pressing force adjusting mechanism 24 is operated to adjust the pressing force in the ink containing cylinder 10 according to the user's preference. Even if the rotary body 6 is rotated to change the setting of the pressure applied to the ink 11, the ball-point pen refill 8 does not move back and forth with respect to the shaft cylinder, so the ball-point pen refill 8 from the front end opening 3 a of the front shaft 3. There is no change in the protruding length of the tip of the writing instrument, and the writing instrument can be used without changing its position when gripping it.

  The pressure-type writing instrument 1 according to the present embodiment includes a barrel 4 that can accommodate a refill 8 filled with an ink composition (ink) 11 for a writing instrument, and an ink composition for a writing instrument (ink ) 11, a pressurizing mechanism 7 for applying a pressure, and a pressurizing force adjusting mechanism 24 for adjusting the pressure.

  According to such a pressure-type writing instrument 1, the pressure-type writing instrument 1 can apply pressure to the ink composition (ink) 11 for a writing instrument in the refill 8 as the refill 8 retracts due to the writing pressure during writing. In the above, the amount of the ink composition (ink) 11 for a writing instrument flowing out from the refill 8 at the time of writing can be changed by adjusting the pressure applied to the ink composition (ink) 11 for a writing instrument by the pressing force adjusting mechanism 24. This allows the thickness and/or the density of the handwriting to be adjusted according to the preference of the user.

  The pressure-type writing instrument 1 of the present embodiment further includes a rotating body 6 provided so as to project from the rear end of the barrel 4, and the pressing force adjusting mechanism 24 rotates the rotating body 6 to generate pressure. adjust.

  According to such a pressure-type writing instrument 1, the user can easily adjust the pressure applied to the ink composition (ink) 11 for a writing instrument by rotating the rotating body 6.

  The pressure-type writing instrument 1 according to the present embodiment includes an ink container 10 filled with an ink composition (ink) 11 for a writing instrument in a shaft cylinder 4, and a ballpoint pen tip 13 in a front portion of the ink container 10. The ball-point pen refill 8 is housed, and the ball-point pen refill 8 is retracted by applying a writing pressure behind the ball-point pen refill 8 to apply pressure to the rear end of the ink composition (ink) 11 for a writing instrument. 7 is a pressure-type writing instrument in which a rotating body 6 projecting from the rear end of the barrel 4 behind the pressure mechanism 7 and a ball-point pen refill 8 that operates by rotating the rotating body 6. And a pressing force adjusting mechanism 24 for adjusting the amount of retreat of the rotating body 6, and the pressurizing mechanism 7 is locked to the shaft cylinder 4 so as not to rotate and movable back and forth, and the rotating body 6 rotates with respect to the shaft cylinder 4. It is movably locked, and by rotating the rotating body 6, the pressurizing force adjusting mechanism 24 is operated to adjust the pressure applied to the rear end of the ink composition (ink) 11 for a writing instrument in the ink containing cylinder 10. The relative position of the ball-point pen refill 8 with respect to the axial cylinder 4 in the axial direction is not changed before and after the rotating body 6 is rotated.

According to such a pressure-type writing instrument 1, by rotating the rotating body 6, the pressing force adjusting mechanism 24 that changes the amount of retreat of the ball-point pen refill 8 is actuated, and the ink composition (ink) 11 for writing instrument during writing. By adjusting the pressure applied to the rear end, the outflow amount of the ink composition (ink) 11 for a writing instrument 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 selected by the user. Can be adjusted to suit.
Further, since the pressure-type writing instrument 1 of the present embodiment is a so-called writing pressure-pressure type, pressure is applied to the rear end of the writing instrument ink composition (ink) 11 only when writing pressure is applied. Therefore, no pressure is applied to the rear end of the ink composition (ink) 11 for a writing instrument during non-writing and storage, and it is possible to prevent ink from leaking from the front end of the ballpoint pen tip 13.

  Further, when the rotating body 6 is rotated, the relative position of the ball-point pen refill 8 and the barrel 4 does not change in the axial direction, so that the front end portion of the ball-point refill 8 is moved from the front end opening 3 a of the barrel 4. The protruding length does not change. Therefore, it is not necessary to change the position where the shaft cylinder 4 is gripped even if the pressing force is adjusted, and it is possible to continue writing while keeping the sense of distance to the paper surface and the grip position constant.

  In the pressure-type writing instrument 1 of the present embodiment, the slide member 5 that is fixed to the shaft cylinder 4 so as not to be rotatable and movable back and forth is disposed inside the shaft cylinder 4, and the slide member 5 is slidable. The rotating body 6 includes a pressing mechanism 7 arranged inside the member 5, and a rotating body 6 arranged so as to partially project rearward from the rear end opening of the slide member 5. Is pressed forward, the front end portion of the ball-point pen refill 8 is configured to protrude from the front end opening portion 3a of the barrel 4.

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

  In the pressure-type writing instrument 1 of the present embodiment, the pressurizing force adjustment mechanism 24 is inserted from the slide member 5 and the front end opening 3a of the slide member 5 so as to be rotatable and movable back and forth with respect to the slide member 5. The sliding member 5 includes a stopped rotating body 6 and a sliding member 22 provided inside the rotating body 6 and locked to the rotating body 6 so as to be rotatable and movable back and forth. Between the rotary body 6 and the first cam mechanism 30 for moving the rotary body 6 back and forth with respect to the slide member 5, and between the rotary body 6 and the sliding member 22, A second cam mechanism 40 for moving the sliding member 22 back and forth.

According to the pressure-type writing instrument 1 as described above, the operation of causing the ball-point pen refill 8 to be retracted and retracted by the pressing (knocking operation) of the rotating body 6 and the sliding member 22 to be moved back and forth by the rotation of the rotating body 6 to adjust the pressing force. It becomes possible to execute the operation separately. Therefore, the retracting mechanism of 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 ball-point pen refill 8 is protruded from the front end opening 3a of the barrel 4 when the rotating body 6 is pressed, the slide member 5 that interlocks with the longitudinal movement of the rotating body 6 is used. Even if it is maintained by providing the projection-shaped hooking portion 5a, forming the clip 9 on the outer peripheral portion of the shaft cylinder 4, and hooking the hooking portion 5a and the hooked portion 9c formed on the clip 9 Of course, it may be maintained by hooking the hooking portion on the hooked portion formed on the side surface of the shaft cylinder 4, but the slide member 5 returns to its original position when the hooked state is released. It is preferable that the coil spring or rubber is used to repel the structure.

  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 a rotating member is provided 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 in which the rotating body 6 moves back and forth with respect to the slide member 5 when the rotating body 6 is rotated, 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 with respect to the slide member 5 and the sliding member 22 with respect to the rotating body 6. Is configured to act in the same direction in the opposite direction to that of the sliding member 5, so that the rotating member 6 is rotated, and even if the rotating member 6 moves back and forth with respect to the slide member 5, the sliding member is moved. 22 can be configured so as not to move relative to the slide member 5 in the front-back direction.

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

  According to such a pressure-type writing instrument 1, the first cam mechanism 30 forms the first cam slope 5f on the inner surface of the slide member 5 and the first cam projection 6d on the outer surface of the rotating body 6. The first cam projection 6d and the first cam slope 5f are configured to be in sliding contact with each other, whereby the rotating body 6 moves back and forth with respect to the slide member 5. In addition, the second cam mechanism 40 forms the second cam projection 6f on the inner surface of the rotating body 6 and the second cam slope 22a on the outer surface of the sliding member 22 to form the second cam projection 6f. The sliding member 22 moves back and forth with respect 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 protrusion is provided on the inner surface of the slide member 5 and the cam protrusion and a cam slope formed on the outer surface of the rotating body 6 are in sliding contact with each other. Further, the second cam mechanism 40 may be configured such that a cam slant surface is provided on the inner surface of the rotating body 6 and the cam slant surface and the cam protrusion formed on the outer surface of the sliding member 22 slide.

  A first cam projection 6d is formed on the outer surface of the rotating body 6, a first cam slope 5f is provided on the inner surface of the slide member 5 for sliding contact with the first cam projection 6d, and the inner surface of the rotating body 6 is formed. It is preferable to form the second cam projection 6f and provide a second cam slant surface 22a on the outer surface of the sliding member 22 that is in sliding contact with the second cam projection 6f. In this case, the outer surface and the inner surface of the rotating body 6 are preferably formed. By forming the cam protrusions 6d and 6f, it becomes easy to control the sliding contact position between the rotating body 6 and the slide member 5 and the sliding member 22, and the length by which the slide member 5 moves back and forth with reference to the rotating body 6, The sliding member 22 has the effect of making it easy to match the lengths of the front and rear movements.

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

  In the pressure-type writing instrument 1 of the present embodiment, the pressure mechanism 7 is provided inside the tubular body 18 having the through hole 18a penetrating in the front-rear direction, and the rear end of the ball-point pen refill 8 is disposed. An elastic member 20 that is detachably mounted, and a pressurizing chamber (pressurizing chamber) formed between the inner wall of the elastic member 20 and the rear end of the ink containing cylinder 10 and communicating with the rear end opening of the ink containing cylinder 10. Space 21), a stopper 19 provided inside the tubular body 18 and behind the elastic member 20, and an air hole 20c for communicating the pressurizing chamber (pressurizing space) 21 with the outside. , The tubular member 18 is locked to the slide member 5 so as not to be rotatable and movable back and forth, and the sliding member 22 is locked to the cylindrical member 18 so as to be movable back and forth and not rotatable, By disposing the elastic member (pressurizing coil spring) 23 between the rear inner step portion of the body 18 and the front inner step portion of the sliding member 22, the tubular body 18 moves forward with respect to the sliding member 22. When the cylindrical body 18 retracts together with the ball-point pen refill 8, the elastic member 20 and the stopper 19 come into contact with each other to deform the elastic member 20, and the pressurizing chamber (pressurizing space) 21 is compressed. Then, pressure is applied to the rear end of the ink composition 11 in the ink containing cylinder 10.

According to the pressure-type writing instrument 1 as described above, in the pressure mechanism 7, the elastic member 20 abuts on the stopper 19 and is deformed by retracting the tubular body 18 together with the ball-point 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 the deformation, and pressure is applied to the rear end of the ink composition (ink) 11 for a writing instrument. In this case, when the compressed pressurizing chamber (pressurizing space) 21 is opened, it is possible to restore the original non-compressed state by the elastic force of the elastic member 20, so that an elastic body such as a spring is separately provided. It is not necessary to arrange the springs, and the elastic force of the springs can be reduced even when the springs are arranged, so that the degree of freedom in design can be increased.
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 preferably used. it can.

Further, a display portion is provided on the outer surface of the rotating body 6, and when the step portions 5g, 22b and the cam projections 6d, 6f of the rotating body 6 come into contact with each other, the display portion of the rotating body 6 and the outer surface of the barrel 4 are provided. It may be configured such that a portion that coincides with the display portion provided in the above indicates the strength of the pressing force at that time.
As a method of expressing the strength of the pressing force, numbers (0, 1, 2, 3,...), letters (strong, medium, weak, nothing), symbols, etc. can be used, and are not particularly limited. Not something.

  Various modifications can be made to the above-described first embodiment. Modifications will be described below with reference to the drawings as necessary. In the following description and the drawings used in the following description, the same reference numerals as those used for the corresponding portions in the first embodiment will be used for the portions that can be configured in the same manner as in the first embodiment, and will be duplicated. The description is omitted. Further, when it is clear that the effects obtained in the first embodiment can be obtained in the modified example as well, the description thereof may be omitted.

  FIG. 13 shows a pressure-type writing instrument 100 according to this modification, and a rear shaft 200 of the pressure-type writing instrument 100 has a display portion 200b formed on the outer surface 200a with lines and numbers. Further, on the outer surface 600a of the rotating body 600, there is formed a display portion 600b which is concave and has a triangular shape when viewed from the side.

In the present modification, when the rotating body 600 is rotated with the rotating body 600 knocked forward, the front end apex portion 600c of the display unit 600b is aligned with the linear portion 200c of the display unit 200b of the rear shaft 200, By reading the numeral portion 200d at the front of the linear portion 200c, the pressure applied to the rear end of the ink at that time can be visually recognized.
In this modified example, when the front end apex 600c of the display unit 600b is aligned with "2" of the numeral portion 200d, the applied pressure is adjusted to the maximum state (Fig. 10A) and is adjusted with "1". It is adjusted so that a low pressing force is applied (FIG. 10B) when it is turned on, and it is adjusted so that no pressing force is applied when it is set to “0” (FIG. 10C). .

[Second Embodiment]
Next, a second embodiment will be described with reference to FIGS. 14 to 29C.
As shown in FIG. 14 to FIG. 19, the pressure-type writing instrument 101 of the present embodiment forms a shaft cylinder 104 by screwing a front shaft 103 in front of a rear shaft 102, and a front and rear inside the shaft cylinder 104. A slide member 105 that is movably arranged, a rotating body 106 that is rotatably locked to the slide member 105, a pressure mechanism 130 that is arranged inside the slide member 105, and a pressure mechanism 130 The ball-point pen refill 108 is slidable back and forth in the shaft cylinder 104, and the clip 109 is rotatably locked to the side surface of the rear shaft 102.

The ball-point pen refill 108 has a transparent ink container 110 made of PP resin, and has an ink viscosity of 755 mPa·s in a writing ink (under an environment of 20° C., a shear rate of 1.92 sec ⁻¹ (rotation speed 0.5 rpm)). The ink 111, which is a water-based gel ink), and the grease-like ink follower 112, which follows the ink 111 as the ink 111 is consumed, are directly stored in the rear end of the ink 111, and a ball (φ0. 38 mm) is rotatably held, and the rear end of the ball-point pen tip 113 is press-fitted.

  As shown in FIG. 15, the front shaft 103 has a front end opening 103a formed at the front end thereof, through 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 102b is formed on the outer side surface 102a so as to extend along the axial direction and penetrate to the inner hole. Further, a clip locking portion 102c protruding outward is formed on the outer side surface 102a, and the clip locking portion 102c is composed of a clip locking projection 102d and a spring locking projection 102e. A locking hole 102f is formed in the clip locking projection 102d in a direction orthogonal to the axial direction.
Further, the rear inner peripheral surface of the rear shaft 102 is formed with a locking rail portion 102g protruding inward and extending in the front-rear direction, and the inner inner surface of the front inner peripheral surface extending in the circumferential direction and formed in a concave shape. A stop 102i is formed.

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

  In addition, a ring-shaped middle piece 107 is arranged inside the rear shaft 102, and an outer locking portion 107 a formed on the outer peripheral portion of the middle piece 107 is formed as an inner locking portion of the rear shaft 102. The middle piece 107 is non-detachably attached to the rear shaft 102 by being dropped into 102i and fitted. Further, an inner step portion 107b is formed on the inner peripheral portion of the rear portion of the middle piece 107.

  As shown in FIG. 15 to FIG. 18, the slide member 105 has a hook portion 105a protruding outwardly on the outer peripheral portion, and the hook portion 105a is inserted into the side hole 102b of the rear shaft 102. In addition, a locking groove 105b extending along the axial direction is formed on the outer surface of the rear portion of the slide member 105. By mounting the locking groove 105b on the locking rail portion 102g of the rear shaft 102, A slide member 105 is locked to the shaft 102 so as to be slidable back and forth and not rotatable.

Further, as shown in FIG. 17, a slit portion 105c extending rearward from the front end is formed on the side surface of the slide member 105, and the slit portions 105c are formed at two symmetrical positions with the axial center therebetween. .. Then, a slit engaging portion 105d having a partially narrow slit width is formed at the rear portion of the slit portion.
Further, a first cam slope 105e is formed on the inner surface of the slide member 105 so as to be inclined along the axial direction and protrudes inward. The stepped portion 105f (first stepped portion 105f1, second stepped portion 105f2, third stepped portion 105f3) is formed. In addition, each of the plurality of step portions 105f has a concave portion 105g formed in a concave shape toward the rear.

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

As shown in FIGS. 14 to 16, the clip 109 has a clip coil spring 116 disposed between the spring locking projection 102e of the rear shaft 102 and the inner wall portion 109a of the clip 109, and the inside of the clip 109 is By locking the locking shaft portion 109b formed on the wall in the locking hole 102f, the tip portion of the clip 109 is stretched so as to be always elastically resilient to the outer wall surface side of the rear shaft 102. Further, by pressing the rear end of the clip 109 (in the direction of arrow G in FIG. 15), the locking shaft R between the clip 109 and the rear shaft 102 is used as a fulcrum, and the front end of the clip 109 is fixed to the outer wall surface of the rear shaft 102. It is configured as a movable clip that can be separated from.
A front portion of the clip 109 is formed with a latched portion 109c that extends from the base portion 109d to the shaft cylinder 104 side and that latches with a latching portion 105a formed on the side surface of the slide member 105.

  As shown in FIGS. 15 to 17, the pressing mechanism 130 is housed behind the ball-point pen refill 108 of the ball-point pen refill 108 and inside the slide member 105 so as to be movable back and forth with respect to the slide member 105, and has a cylindrical shape. And a piston 118 that is disposed in the rear portion of the cylinder 117 and is attached to the cylinder 117 so as to be movable back and forth, and is attached to the inner peripheral portion of the front portion of the cylinder 117 so as to be movable back and forth, and , An airtight valve 119 detachably attached to the rear end of the ballpoint pen refill 108, a pressurizing coil spring (elastic member) 120 stretched between the airtight valve 119 and the piston 118, a cylinder 117 and a piston. A pressurizing space (pressurizing chamber) 121 which is surrounded by 118 and the airtight valve 119 and communicates with the rear inner hole 108a of the ballpoint pen refill 108.

The cylinder 117 will be described in detail. As shown in FIGS. 15 to 17, the cylinder 117 has a through hole 117a penetrating in the front-rear direction and having a plurality of steps. Further, an outer peripheral portion of the cylinder 117 is formed with a locking projection 117b protruding outward and a side hole 117c penetrating to the through hole 117a and extending in the axial circumferential direction.
Further, 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 provided on the slit locking portion 105d of the slit portion 105c formed on the side surface of the slide member 105 at the slit locking portion 105d and the locking protrusion 117b. An axial gap between and is loosely fitted so as to be movable back and forth, whereby the cylinder 117 is locked together with the slide member 105 with respect to the rear shaft 102 (shaft cylinder 104) so as not to be rotatable and movable back and forth. It

The piston 118 will be described in detail. As shown in FIGS. 15 to 19, a front end recess 118a that is recessed rearward is formed in the front end. Further, a groove 118b extending in the axial direction is formed on the side surface, and a first O-ring 122 formed of silicone rubber having a durometer A hardness of 50 measured by JIS-K6235 is formed in the groove 118b as an airtight member. It is installed. The outer end of the first O-ring 122 (airtight member) is configured to contact the inner peripheral surface of the cylinder 117, and the first O-ring 122 (airtight member) is provided between the cylinder 117 and the piston 118. Is sealed to seal the pressurizing space 121, and a certain sliding resistance is generated in sliding the piston 118 back and forth with respect to the cylinder 117.
Further, the piston 118 is formed such that the front portion is larger in diameter than the rear portion, and the outer surface step portion 118c formed on the outer peripheral portion abuts on the inner step 117h of the cylinder 117 to restrict the backward movement of the piston 118. is there. A flat surface portion 118g is formed on the outer peripheral portion of the rear portion of the piston 118. By mounting the flat surface portion 118g so as to align with the flat portion 117e of the cylinder 117, the piston 118 can be moved back and forth with respect to the cylinder 117 and can rotate. It is mounted immovably.

  A second cam slope 118d is formed on the side surface of the piston 118. A plurality of step portions 118e (first step portion 118e1, second step portion 118e2, third step portion 118e3) are formed on the second cam slope 118d, and each of the plurality of step portions 118e moves forward. A concave portion 118f is formed so as to be concave.

  The airtight valve 119 will be described in detail. As shown in FIGS. 15 to 17, the airtight valve 119 has an axially extending rearward inner hole 108a and a pressurizing space 121 extending in the axial direction. An inner hole 119a for connection is formed. The front portion 119b of the airtight valve 119 is formed with a smaller 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 connected to the rear inner hole 108a of the ball-point pen refill 108 by the inner hole 119a 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. By inserting the outer protrusion 119d of the airtight valve 119 into the side hole 117c of the cylinder 117, the airtight valve 119 is attached to the cylinder 117 so that it can be moved back and forth and is not detachable.
The forward/backward movement of the cylinder 117 with respect to the airtight valve 119 is caused by the front end of the outer projection 119d and the front end of the side hole 117c contacting each other, or the rear end of the collar portion 119g and the front end of the cylinder 117 contacting each other. It is configured to be restricted.

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

Further, a rear inner step portion 119f is formed in the inner hole 119a of the airtight valve 119, and the coil spring for pressurization 120 is stretched between the rear inner step portion 119f and the front end recess 118a of the piston 118 so as to be airtight. The valve 119 is bulged forward with respect to the piston 118.
Further, since the collar portion 119g of the airtight valve 119 is configured to contact the rear end of the spacer ring 114, the piston 118 is elastically pushed rearward through the airtight valve 119 by the coil spring 120 for pressurization. Become.

  Next, the rotating body 106 will be described in detail. As shown in FIGS. 15 to 16, the rotating body 106 is inserted into the slide member 105 from the front end opening portion of the slide member 105, and the rear opening portion of the slide member 105 is opened. It is attached so that a part of it protrudes rearward from.

Further, as shown in FIG. 17, the rotating body 106 is formed with a first cam projection 106b extending rearward from the front outer peripheral surface 116a and a frontward extending forward from the rear inner peripheral surface 106c. Second cam projection 106d is formed.
The first cam mechanism 140 is configured by cam-fitting the first cam protrusion 106b of the rotating body 106 and the first cam slope 105e of the slide member 105, and the second cam protrusion of the rotating body 106 is formed. The second cam mechanism 150 is configured by cam-fitting 106d and the second cam slope 118d of the piston 118.

In addition, as shown in FIG. 14, a positioning marker 106f is formed on the outer peripheral surface of the rear portion of the rotating body 106 in a concave shape and in a triangular shape when viewed from the side.
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 apex portion 106g of the alignment marker 106f is replaced by the linear portion of the pressing force display portion 102h of the rear shaft 102. In accordance with the above, by reading the number on the front part of the linear part, it is possible to visually recognize the pressing force applied to the rear end of the ink at that time.
In the present embodiment, when the positioning marker 106f is aligned with "3" on the pressing force display portion 102h, the pressure in the pressure space (pressure chamber) 121 is maximized (FIG. 27A). Is adjusted so that when it is adjusted to “2”, a low pressure is applied (FIG. 27B), and when adjusted to “1”, no pressure is applied ( 27C).

  Further, a tail plug 125 made of a thermoplastic elastomer is press-fitted into the rear end opening of the rotating body 106, and a projection extending in the axial direction is formed on the side surface of the tail plug 125 in the axial direction. By arranging a plurality of them in a uniform manner, it is difficult for the rotating body 106 to slip when rotating the tail plug 125 together.

  It should be noted that the slide member 105, the rotating body 106, the tail plug 125, and the piston 118 form a pressing force adjusting mechanism 160 capable of changing the pressure applied to the pressurizing space 121 by rotating the rotating body 106. Composed.

Next, a state will be described in which the ball-point pen tip 113, which is the writing tip of the ball-point pen refill 108, is pushed and retracted from the front-end opening 103a of the front shaft 103 by pressing (knocking) the rotating body 106 forward.
When the tail plug 125 and the rotating body 106 are pressed forward (in the direction of arrow F in FIG. 15) against the elastic force of the knock coil spring 115 from the state of FIG. 15, the second cam projection 106d of the rotating body 106 is formed. Since the second cam slope 118d of the piston 118 is cam-fitted, the piston 118 is pushed by the rotating body 106 and moves forward together with the rotating body 106. When the front end 106e of the rotating body 106 contacts the rear end 117f of the cylinder 117, the cylinder 117 moves forward, and when the front end of the cylinder 117 and the collar portion 119g of the airtight valve 119 contact each other, the cylinder 117 and the airtight valve 119 and the ball-point pen refill 108 mounted on the mounting portion 119c of the airtight valve 119 move forward, and the front end portion of the ball-point pen tip 113 of the ball-point pen refill 108 projects from the front-end opening portion 103a of the front shaft 103.
At this time, since the locking protrusion 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 that has advanced to the front end of the slit locking portion 105d is not moved. The slide member 105 starts to move forward by abutting, and the hook portion 105a of the slide member 105 hooks on the hooked portion 109c at the tip end portion of the clip 109 arranged on the side surface of the rear shaft 102, so that the ballpoint pen The state of FIG. 20 is maintained in which the front end of the ballpoint pen tip 113 of the refill 108 is kept protruding from the front end opening 103a of the front shaft 103 (shaft cylinder 104).

  Here, when the rear end portion of the clip 109 is pressed (in the direction of arrow G in FIG. 20) to release the hooking state of the hooking portion 105a of the slide member 105 hooked on the hooked portion 109c of the clip 109, the knocking occurs. The ball-pen refill 108, the pressing mechanism 130, the spacer ring 114, the slide member 105, and the rotating body 106 are moved backward by the elastic force of the coil spring 115 for use, and the state shown in FIG. 15 is restored.

Next, in the present embodiment, a state of applying pressure to the rear end of the ink 111 in the ballpoint pen refill 108 via the ink follower 112 will be described with writing pressure when writing.
With the front end of the ballpoint pen tip 113 in FIGS. 20 and 23 protruding from the front end opening 103a of the front shaft 103, the barrel 104 is tilted and held as shown in FIG. 21, and writing pressure is applied to the front end of the ballpoint pen tip 113. When the ball-point pen refill 108 is retracted in the direction of the arrow H in FIG. 21, the slide member 105 cannot be retracted because the hook portion 105a is hooked on the hooked portion 109c of the clip 109, and the rotating body 106 slides. Since the cam 118 is cam-fitted, it cannot be retracted. Further, since the piston 118 is cam-fitted with the rotating body 106, it cannot be retracted. Therefore, the piston 118 resists the elastic force of the coil spring 120 for pressurization. The airtight valve 119 moves backward together with the refill 108. When the second O-ring 123 fixed to the airtight valve 119 comes into contact with the contact portion 117g (rear end of the side hole 117c) of the cylinder 117, the pressurizing space (pressurizing chamber) 121 and the outside are separated from each other. The air passage 124 that has been in communication is closed and the inside of the pressurizing space 121 is airtight, resulting in the state of FIG. Further, when the ball-point pen refill 108 is retracted, the cylinder 117 together with the airtight valve 119 is retracted with respect to the piston 118, the volume of the pressurizing space 121 is reduced, and the interior of the pressurizing space 121 is compressed. 22 and 25, in which pressure is applied to the rear end of the ink 111 in the ballpoint pen refill 108 through the ink follower 112 through the 119a.

  Here, when the writing pressure applied to the front end of the ballpoint pen tip 113 is released from the state of FIGS. 22 and 25, the airtight valve 119 moves forward by the elastic force of the coil spring 120 for pressurization. At this time, the second O-ring 123 is pressed against the contact portion 117g (the rear end of the side hole 117c) of the cylinder 117 by the writing pressure to be deformed, so that the second O-ring 123 and the cylinder 117 are lightly fitted. It is in a state. Therefore, the cylinder 117 is pulled forward in accordance with the advance of the airtight valve 119, and the cylinder 117 also tries to advance at the same time. However, the fitting force acting between the piston 118 and the cylinder 117 by the first O-ring 122 is set to be larger than the fitting force acting between the airtight valve 119 and the cylinder 117 by the second O-ring 123. Therefore, the cylinder 117 does not move with respect to the piston 118, and only the airtight valve 119 is advanced to the state shown in FIG. As a result, when the second O-ring 123 and the contact portion 117g (the rear end of the side hole 117c) of the cylinder 117 are separated from each other, the air passage 124 is formed so that the pressurizing space 121 communicates with the outside and the atmospheric pressure. And the same pressure. After that, the forward end of the outward protrusion 119d of the airtight valve 119 that has advanced and the forward end of the side hole 117c of the cylinder 117 come into contact with each other, and the cylinder 117 also starts to move forward with a delay, and returns to the state of FIGS. 20 and 23. As a result, the ink 111 in the ink containing cylinder 110 is consumed by writing with the pressure-type writing instrument 101 in a state where the writing pressure is applied, and even if the pressure space 121 is decompressed by that amount, the cylinder is released when the writing pressure is released. The air passage 124 is formed by moving the airtight valve 119 forward before moving forward the 117, and the pressure space 121 has the same pressure as the atmosphere. Therefore, the inside of the pressure space 121 is equivalent to that when compressed by writing pressure. It is possible to prevent a negative pressure state that is lower than the atmospheric pressure without being forced to reduce the pressure.

  As an example, in the state of FIGS. 22 and 25 where the front end of the ball-point pen tip 113 of the present embodiment is applied with a writing pressure, the fitting force generated between the airtight valve 119 and the cylinder 117 by the second O-ring 123. (Pressing force required to move the cylinder 117 with respect to the airtight 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 (to the piston 118). Since the pressing force required to move the cylinder 117 is 0.5 N, the cylinder 117 does not move with respect to the piston 118 and only the airtight valve 119 moves forward when the writing pressure is released. Composed.

Next, in the knocked state of FIG. 20, an operation of rotating the rotating body 106 with respect to the rear shaft 102 to operate the pressing force adjusting mechanism 160 and adjust the pressing force applied to the ink 111 will be described.
From the state of FIG. 20 and FIG. 27A until the front end apex 106g (see FIG. 14) of the positioning 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 rotating body 106 is rotated leftward (counterclockwise) when viewed from the rear end side and brought into the state of FIG. 27B, the slide member 105 is locked to the rear shaft 102 so as not to rotate, As shown in FIGS. 28A to 28B, the first cam protrusion 106b of the rotating body 106 moves from the first step portion 105f1 to the adjacent second step portion 105f2 along the first cam slope 105e of the slide member 105. At this time, the rotating body 106 advances with respect to the slide member 105 by the amount of L1 in which the first cam projection 106b has moved one step (see FIG. 28A).
Since the piston 118 is non-rotatably locked to the rear shaft 102 (the shaft cylinder 104) via the cylinder 117 and the slide member 105, the rotation of the rotating body 106 causes the piston 118 to rotate. As described above, the second cam projection 106d of the rotating body 106 moves from the first step 118e1 to the adjacent second step 118e2 along the second cam slope 118d of the piston 118. At this time, the piston 118 retracts with respect to the rotating body 106 by the amount M1 in which the second cam protrusion 106d has moved one step (see FIG. 29A). Therefore, the piston 118 moves forward by L1 by the first cam mechanism 140 and moves backward by M1 by the second cam mechanism 150. Further, in the present embodiment, since the configuration is such that L1=M1, only the rotating body 106 advances by L1 with respect to the shaft cylinder 104, and the piston 118 does not change the relative position with respect to the shaft cylinder 104. Further, since the position of the piston 118 does not change, the position of the airtight valve 119 elastically bulged forward by the pressurizing coil spring 120 does not change, and the position of the ball-point pen refill 108 mounted on the mounting portion 119c of the airtight valve 119 does not change. The relative position with respect to the shaft cylinder 104 also does not change. Therefore, the gap between the rear end 117f of the cylinder 117 and the front end 106e of the rotating body 106 is shortened by L1 as the rotating body 106 moves forward, and the length that the ball-point pen refill 108 can retract when the writing pressure is applied is also reduced by L1. As the amount of compression of the pressurizing space (pressurizing chamber) 121 decreases, the pressure applied in the pressurizing space 121 decreases. As a result, the pressure applied to the rear end of the ink 111 in the ball-point pen refill 108 can be reduced by rotating the rotating body 106 leftward (counterclockwise) when viewed from the rear end side.

27B from the state of FIG. 27B until the front end apex 106g (see FIG. 14) of the alignment marker 106f of the rotating body 106 matches the position “2” to “1” of the pressing force display portion 102h of the rear shaft 102. By rotating the moving body 106 counterclockwise (counterclockwise) and moving the first cam projection 106b along the first cam slope 105e of the slide member 105 to bring the state of FIG. 27C, the first cam is obtained. 28B to 28C, the first cam projection 106b of the rotating body 106 is moved from the second step portion 105f2 to the adjacent third step portion 105f3 by the mechanism 140, and the second cam mechanism 150 is changed from FIG. 29B to FIG. As in 29C, the second cam protrusion 106d of the rotating body 106 moves from the second step 118e2 to the adjacent third step 118e3. At this time, since the moving amount L2 of the first cam protrusion 106b and the moving amount M2 of the second cam protrusion 106d are the same, the piston 118 does not move and only the rotating body 106 further advances by M2 with respect to the cylinder 117. Then, the front end 106e of the rotating body 106 contacts the outer surface step portion 118c of the piston 118.
In this state, since the rear end 117f of the cylinder 117 is in contact with the front end 106e of the rotating body 106 and therefore cannot be retracted, the ball pen refill 108 is also reduced in the retracted length and the pressurizing space 121 is sealed. Can not be. Therefore, the ink 111 is not pressed by the pressing mechanism 130 even if a writing pressure is applied during writing, and the ink can be used as a non-pressurized writing tool, and even if it is stored in a knocked state, the ball-point pen refill 108 is erroneously operated. Since the inside is not pressurized, it is possible to prevent the ink 111 from flowing out 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 during writing by rotating the rotating body 106 even when not knocking as in knocking.

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

  As described above, the pressure-type writing instrument 101 of the present embodiment adjusts the pressure inside the ink containing cylinder 110 according to the user's preference by rotating the rotating body 106 and operating the pressure adjusting mechanism 160. The thickness of the handwriting and the handwriting density can be improved by changing the amount of ink ejected from the tip of the ballpoint pen tip 113, and even when the setting of the pressure applied to the ink 111 is changed by rotating the rotating body 106, the ballpoint pen refill is performed. Since 108 does not move back and forth with respect to the barrel, the length at which the tip of the ballpoint refill 108 projects from the front end opening 103a of the front shaft 103 does not change, and the position where the writing instrument is gripped can be changed. It became possible to continue using it without using it. Further, it was possible to provide a pressure-type writing instrument capable of preventing backflow of the ink 111 in the ink containing cylinder 110 due to negative pressure in the pressure space 121 (pressure chamber) when the writing pressure is released.

  The pressure-type writing instrument 101 of this embodiment includes an ink container 110 filled with an ink composition (ink) 111 for a writing instrument in a shaft cylinder 104, and a ballpoint pen tip 113 in a front part of the ink container 110. The ball-point pen refill 108 is housed, and the ball-point pen refill 108 is retracted behind the ball-point pen refill 108 when a writing pressure is applied, and a pressure mechanism 130 for applying pressure to the rear end of the ink composition 111 for a writing instrument is arranged. In the pressurizing writing instrument 101 provided, the pressurizing mechanism 130 has a cylinder 117 formed in a tubular shape and an airtight deforming portion (second O-ring) 123 on the outer peripheral surface of the cylinder 117. 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 an airtight member arranged between the piston 118 and the cylinder 117 (first An O-ring) 122, a cylinder 117, an airtight valve 119, a piston 118, an airtight member (first O-ring) 122, and a pressure chamber (pressure space) 121 that communicates with the rear portion of the ball-point pen refill 108, An elastic member (a coil spring for pressurization) 120 which is arranged between the airtight valve 119 and the piston 118 and elastically springs the airtight valve 119 forward, and when the writing pressure is applied to the front end of the ballpoint pen tip 113, the ballpoint pen refill is performed. 108 retracts, and in conjunction with the retraction of the ballpoint refill 108, the cylinder 117 and the airtight valve 119 retreat with respect to the piston 118 against the resilience of the resilient member (coil spring for pressurization) 120, and add. When the pressure chamber (pressurizing space) 121 is closed and then compressed to pressurize, and when the writing pressure on the ballpoint pen refill 108 is released, the airtight valve 119 moves forward with respect to the piston 118 before the cylinder 117. The air passage 124 that connects the pressurizing chamber (pressurizing space) 121 to the outside is formed, and the airtight state of the pressurizing chamber (pressurizing space) 121 is released to the same pressure as the atmospheric pressure, and then the cylinder 117 moves forward with a delay.

  Airtight member (first O-ring) 122 In such a pressure-type writing instrument 101, when writing pressure is applied to the front end of the ballpoint pen refill 108, the cylinder 117 and the airtight valve 119 cause the elastic member (pressurizing coil spring) 120 to move. The cylinder 117 is retracted against the piston 118 against the elastic force to seal and compress the inside of the pressure chamber (pressure space) 121, and when the writing pressure on the ballpoint pen refill 108 is released. The airtight valve 119 is further advanced with respect to the piston 118 to form an air passage 124 that communicates the pressurizing chamber (pressurizing space) 121 with the outside. Therefore, even if the writing ink consumes the writing instrument ink in the ink containing cylinder 110 and the pressure in the pressurizing chamber (pressurizing space) 121 is lowered, the pressurizing chamber (pressurizing space) 121 is airtight. After releasing the state, 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, the inside of the pressurizing chamber (pressurizing space) 121 has a negative pressure lower than the atmospheric pressure. It is possible to prevent the state from being brought into a state and prevent the backflow of the ink due to the air being drawn in from the tip of the ballpoint pen tip 113.

  In the pressure-type writing instrument 101 of the present embodiment, when writing pressure is applied to the front end of the ballpoint pen refill 108, the airtight deforming portion (second O-ring) 123 of the airtight valve 119 and the abutting portion of the cylinder 117 come into contact with each other. Thus, the inside of the pressurizing chamber (pressurizing space) 121 is configured to be in an airtight state, and when the writing pressure on the ballpoint pen refill 108 is released, the airtight deformation portion (second O-ring) of the airtight valve 119. The fitting force generated between the piston 118 and the cylinder 117 by the airtight member (first O-ring) 122 is made larger than the fitting force generated between the airtight valve 119 and the contact portion of the cylinder 117 by 123. Thus, the airtight valve 119 is configured to advance with respect to the piston 118 before the cylinder 117.

In such a pressure-type writing instrument 101, when the writing pressure is applied, the cylinder 117 pushed by the airtight valve 119 and retracted at the same time is released from the piston 118 by the airtight member (first O-ring) 122 when the writing pressure is released. Due to the fitting force generated between the airtight valve 119 and the forward movement of the airtight valve 119, the contact state between the airtight deformation portion (second O-ring) 123 of the airtight valve 119 and the front inner end portion of the cylinder 117 can be released. The air passage 124 communicating with the outside is formed between the airtight deformation portion (second O-ring) 123 and the front inner end portion which are separated from each other, so that the cylinder 117 is advanced before the writing pressure is released. The airtight state in the pressurizing chamber (pressurizing 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 deforming portion (second O-ring) 123, and The fitting force generated between the piston 118 and the cylinder 117 by the airtight member (first O-ring) 122 is necessary for sliding the cylinder 117 with respect to the airtight member (first O-ring) 122. And the pressing force required to slide the cylinder 117 with respect to the piston 118, and each fitting force can be measured by using a push-pull gauge.

  Further, the airtight deformation portion (second O-ring) 123 of the airtight valve 119 in the present embodiment may be integrally formed on the side surface of the airtight valve 119 by two-color molding or the like, and has rubber elasticity. It may be formed by locking another component such as an O-ring. As a material for forming the airtight deformable portion (second O-ring) 123, use a synthetic resin having rubber elasticity such as silicone rubber, nitrile rubber, ethylene/propylene/diene rubber, fluororesin, or thermoplastic elastomer. The hardness is determined as a durometer A hardness measured by JIS-K6235 so that the inside of the pressurizing chamber (pressurizing space) 121 is likely to be airtight when the O-ring comes into contact with the front inner end of the cylinder 117. , 20 or more and 90 or less.

Further, an airtight member (first O-ring) 122 arranged between the cylinder 117 and the piston 118 seals between the cylinder 117 and the piston 118 to form an airtight state, and at the same time, the cylinder 117 and the piston 118. It is preferable to fix it to either the cylinder 117 or the piston 118 so that an appropriate frictional force is generated between the piston 118 and 118, and it is preferable to lock it to the outer peripheral portion of the piston 118 in consideration of ease of assembly. Like the airtight deformation portion (second O-ring) 123 of the airtight valve 119, the airtight 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. You may.
Further, as a material forming the airtight member (first O-ring) 122, a synthetic resin having rubber elasticity such as silicone rubber, nitrile rubber, ethylene/propylene/diene rubber, fluororesin, or thermoplastic elastomer can be used. The hardness is preferably 20 or more and 70 or less as a durometer A hardness measured by JIS-K6235.

The pressure-type writing instrument 101 according to the present embodiment is applied so that the air in the closed pressure chamber (pressure space) 121 that is in contact with the rear end of the writing instrument ink stored in the ink storage cylinder 110 has a pressure higher than atmospheric pressure. It becomes possible to easily eject the writing instrument ink by pressing, and the degree of pressurization may be appropriately set depending on the characteristics such as the viscosity of the writing instrument ink and the structure of the ballpoint pen tip 113.
When the atmospheric pressure is 1000 hPa, for example, in a writing instrument ink having a low viscosity (for example, a writing instrument ink having a viscosity of 1 mPa·s to 2000 mPa·s in an environment of 20° C.), a pressure chamber (pressurized space). It is possible to easily discharge the ink for a writing instrument by setting the pressure of the sealed air in 121 to a pressure state in which it exceeds 1005 hPa and becomes 1500 hPa.

  The pressure-type writing instrument 1, 100, 101 can be implemented without being limited to the type of ink such as oil-based ink or water-based ink. In particular, when water-based ink or water-based ink with shear thinning viscosity is used, the amount of ink discharged increases and decreases greatly due to pressure, and the difference due to changes in the applied pressure such as the thickness and width of the handwriting and the density of the handwriting is suitable. Can be used. Furthermore, when a thermochromic ink using a microcapsule pigment is used as the ink, it is generally desirable to increase the ink discharge amount because the handwriting tends to be thin. Since the influence is great, the present invention in which the pressing force can be changed according to the application can be preferably used.

  Next, a modified example 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, the same reference numerals as those used for the corresponding portions in the second embodiment will be used for the portions that can be configured in the same manner as in the second embodiment, and will be duplicated. The description is omitted. Further, when it is clear that the operational effects obtained in the second embodiment can be obtained in the modified example as well, the description thereof may be omitted.

  FIG. 30 is a partial vertical cross-sectional view showing the pressure-type writing instrument 201 according to the present modification, and shows the pressure-type writing instrument 201 in a state where the rotating body 106 is knocked forward. 31: is a figure which shows the cross section of the pressurizing writing instrument 201 corresponding to the XXXI-XXXI line in FIG. 30, and FIG. 32 shows each component which comprises the pressurizing mechanism and pressurizing force adjustment mechanism of the pressurizing writing instrument 201. As shown in FIG. FIG. 33 is an exploded view, and FIG. 33 is an enlarged vertical cross-sectional view showing the rotating body 106 of the pressure-type writing instrument 201.

  In the pressure-type writing instrument 201 of the present modification, an example in which a thermochromic ink is used as the writing instrument ink composition 111 with which the ballpoint pen refill 108 is filled will be described. The ink composition (ink) 111 for a writing instrument of the present modification is a reversible thermochromic ink containing a reversible thermochromic microcapsule pigment. Therefore, the formed handwriting has a thermochromic property and is discolored or decolored by heating or cooling. The ink composition for a writing instrument (ink) 111 is not limited to this, and it is also possible to use an ink composition other than the thermochromic ink.

  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 further preferably 0.5 μm to 3.0 μm. By setting the average particle diameter of the microcapsule pigment within the above numerical range, the writing feeling of the writing instrument of the present invention can be made smoother while maintaining high-density color development. The particle diameter and particle size distribution can be measured by, for example, the Coulter method (electrical detection zone method). Specifically, it is measured using a precision distribution measuring device (Multisizer 4e manufactured by Beckman Coulter), and the average particle diameter (median diameter) is calculated based on the value based on the volume. Alternatively, the average particle diameter (median diameter) is measured on a volume basis based on the values measured using a laser diffraction/scattering particle size distribution measuring device [Horiba Ltd.; LA-300] and calibrated using a standard sample. 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 with respect to the total amount of the ink composition. Is more preferable. By setting the content of the reversible thermochromic microcapsule pigment within the above numerical range, it is possible to improve the color development 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, when a reversible thermochromic ink that is decolored by heating is used, the temperature for decoloring by heating is preferably set to 25°C to 95°C, more preferably 36°C to 90°C. More specifically, the high temperature side discoloration point [complete decoloring temperature (t4)] is set in the range of 25° C. to 95° C., preferably 36° C. to 90° C., and the low temperature side discoloration point [complete coloring temperature] (T1)] can be set in the range of -30°C to +20°C, preferably -30°C to +10°C. With such a configuration, the color can be effectively retained in the normal state (daily living temperature range), and the handwriting can be heated, specifically, by the friction heat by the friction body 125 or the like described later. It can be easily erased.

  In this 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. Accordingly, 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 such that it cannot rotate and cannot move back and forth. The friction body 125 is used, for example, to rub a handwriting with the ink composition 111 for a writing instrument having a thermochromic property and discolor (discolor) the handwriting by frictional heat generated at that time. The friction body 125 is not limited to this, and may be a friction body such as 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-type writing instrument 201 of this modification has a stopper member 170 arranged between the rotating body 106 and the piston 118. The stopper member 170 allows the rotating body 106 to rotate when the rear end of the shaft cylinder 104 is directed upward (FIG. 30), and rotates when the rear end of the shaft cylinder 104 is directed downward (FIG. 34). It is a member having a function of hindering the rotation of the moving body 106. Here, the lower side means a direction in which gravity acts, and the upper side means a direction opposite to the lower side, that is, a direction opposite to a direction in which gravity acts. The state in which the rear end of the shaft cylinder 104 is directed upward refers to a state in which the rear end of the shaft cylinder 104 is located above the front end of the shaft cylinder 104, and the rear end of the shaft cylinder 104 is directed downward. The open state refers to a state in which the rear end of the barrel 104 is located below the front end of the barrel 104. Further, allowing the rotation of the rotating body 106 with the rear end of the shaft cylinder 104 facing upward means that the rear end of the shaft cylinder 104 is positioned above the front end of the shaft cylinder 104. In this state, not only the rotating body 106 is allowed to rotate, but also the rotating body 106 is in some of the states in which the rear end of the shaft cylinder 104 is positioned above the front end of the shaft cylinder 104. It also includes one that allows the rotation of the. Similarly, to impede the rotation of the rotating body 106 with the rear end of the shaft cylinder 104 facing downward means that the rear end of the shaft cylinder 104 is positioned below the front end of the shaft cylinder 104. In the above state, the rotating body 106 is not only prevented from rotating but also in some of the states in which the rear end of the shaft cylinder 104 is positioned below the front end of the shaft cylinder 104. Also includes those that prevent the rotation of the.

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

  The projecting portion 170c is formed so as to radially project from a cylindrical outer peripheral surface of the main body portion 170a. In the illustrated example, the protrusion 170c extends linearly in the front-rear direction. Therefore, the extending direction of the guided portion 170b and the extending direction of the protruding portion 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 from each other. The stopper member 170 is not limited to this, and may have one protrusion 170c or three or more protrusions 170c.

  The stopper member 170 has a through hole 170d that penetrates the main body 170a and the guided portion 170b along the front-rear direction. The through hole 170d is open at each of the rear end surface of the main body 170a and the front end surface of the guided portion 170b. The through hole 170d is not an essential component, and the stopper member 170 may not have the through hole 170d. 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 that guides the guided portion 170b of the stopper member 170 so as to be movable back and forth. The guide portion 118h extends in the piston 118 in the front-rear direction and is formed as a hole that opens to the rear end surface of the piston 118. In a cross section orthogonal to the extending direction of the guide portion 118h, the guide portion 118h has a contour that is complementary to the guided portion 170b of the stopper member 170. That is, in the cross section orthogonal to the extending direction of the guide portion 118h, the guide portion 118h has a contour of a substantially rectangular shape, particularly a substantially square shape. As a result, the stopper member 170 is held so as to be movable back and forth with respect to the piston 118 and non-rotatable. In addition, the cross section of the guide portion 118h has a constant contour along the extending direction of the guide portion 118h. That is, two arbitrary cross sections of the guide portion 118h orthogonal to the extending direction of the guide portion 118h have contours of the same shape.

  As shown in FIG. 33, a regulation portion 106h that regulates the movement of the protruding portion 170c of the stopper member 170 is provided on the inner peripheral surface of the rotating body 106. The number of restricting portions 106h is the same as the number of protruding portions 170c of the stopper member 170. That is, in this modification, the two restricting portions 106h are provided along the circumferential direction of the rotating body 106 with an angular interval of 180 degrees from each other. The illustrated restricting portion 106h includes a first groove portion 106i and a plurality of second groove portions 106j that are located behind the first groove portion 106i and communicate with the first groove portion 106i. The first groove portion 106i extends linearly in the front-rear direction and has a constant width along the circumferential direction of the rotating body 106. The second groove portions 106j are provided so as to correspond to the number of steps 105f of the first cam slope 105e and the number of steps 118e of the second cam slope 118d. That is, in the present modification, three second groove portions 106j are provided for one first groove portion 106i. The second groove portions 106j extend linearly in the front-rear direction and are arranged in the circumferential direction of the rotating body 106. Each second groove portion 106j 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 106i). The width of the second groove portion 106j along the circumferential direction in the predetermined range is set to a size such that the protruding portion 170c of the stopper member 170 can be smoothly moved back and forth within the second groove portion 106j. On the other hand, from the viewpoint of appropriately suppressing the rotation of the friction body 125 when the handwriting is rubbed using the friction body 125, the circumferential play size that may occur between the second groove portion 106j and the protrusion 170c is It is preferable that it is as small as possible.

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

  As shown in FIG. 30, when the rear end of the barrel 104 is directed upward, 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 170a of the stopper member 170 or the front end of the guided portion 170b contacts the piston 118, and at least the front side portion of the guided portion 170b is inside the guide portion 118h of the piston 118. To position. Further, the protruding portion 170c of the stopper member 170 is located in the first groove portion 106i of the regulating portion 106h of the rotating body 106. Therefore, the protrusion 170c is movable in the circumferential direction within the width of the first groove 106i. That is, the rotating body 106 is rotatable with respect to the stopper member 170 and the piston 118 within the width range of the first groove portion 106i. As a result, the stopper member 170 allows the rotating body 106 to rotate with the rear end of the shaft cylinder 104 facing upward. Therefore, in the state in which the rear end of the shaft cylinder 104 is directed upward, as described above with reference to FIGS. 27A to 27C, the pressing body 106 is rotated to operate the pressurizing force adjustment mechanism 160, so that the writing instrument can be used. It is possible to adjust the pressure applied to the ink composition (ink) 111.

  When rubbing the handwriting by the ink composition (ink) 111 for a writing instrument with the friction body 125 to discolor (decolor) the handwriting, the user does not wear the friction body 125 as shown in FIG. Point downwards. That is, the rear end of the barrel 104 is directed downward. As a result, the stopper member 170 moves backward due to the action of gravity. At this time, the protruding portion 170c of the stopper member 170 enters one of the plurality of second groove portions 106j of the restricting portion 106h of the rotating body 106 (see FIG. 35). Specifically, the protruding portion 170c enters the second groove portion 106j corresponding to the designated position (see FIG. 14) of the positioning marker 106f with respect to the pressing force display portion 102h. In other words, the protruding portion 170c enters into the second groove portion 106j corresponding to the fitting position of the first cam protrusion 106b with respect to the step portions 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 projection 106d with respect to the step portions 118e1 to 118e3 (see FIGS. 28A to 28C) of the second cam slope 118d. To do. The width of the second groove portion 106j in the circumferential direction is smaller than the width of the first groove portion 106i in the circumferential direction, and thus, in the state in which the rear end of the barrel 104 is directed downward, The rotation of 106 is hindered. Therefore, when the rear end of the shaft cylinder 104 faces downward and the projecting portion 170c of the stopper member 170 enters one of the plurality of second groove portions 106j of the regulating portion 106h, the rotating body 106 is rotated. It becomes impossible to adjust the pressure applied to the ink composition (ink) 111 for a writing instrument by moving the ink composition. That is, in this case, when rubbing the handwriting with the friction body 125, the rotating body 106 rotates together with the friction body 125, and the pressing force applied to the ink composition (ink) 111 for a writing instrument is changed regardless of the user's intention. It can be prevented from 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, which is provided at the rear end of the rotating body 106 and rubs the handwriting of the thermochromic ink at that time. The frictional body 125 capable of discoloring the handwriting by the generated frictional heat and the rotating body 106 in the state where the rear end of the barrel 104 is directed upward, allow the rear end of the barrel 104 to move downward. Further provided is a stopper member 170 that prevents the rotation of the rotating body 106 when facing.

  According to such a pressure-type writing instrument 201, in the state where the rear end of the barrel 104 is directed upward, the pressing body adjusting mechanism 160 is operated by rotating the rotating body 106, and the ink composition for a writing instrument (ink ) 111, it is possible to adjust the applied pressure. On the other hand, when the friction body 125 erases the handwriting with the rear end of the shaft cylinder 104 facing downward, the rotation body 106 is prevented from rotating due to the friction of the handwriting by the friction body 125, and thus the writing instrument. It is possible to prevent the pressure applied to the ink composition for ink (ink) 111 from being changed unintentionally.

Claims (12)

A barrel capable of containing a refill filled with an ink composition for a writing instrument,
A pressurizing mechanism for applying pressure to the ink composition for a writing instrument as the refill recedes,
A pressurizing writing instrument, comprising: a pressing force adjusting mechanism that adjusts the pressure. Further comprising a rotating body provided so as to project from the rear end of the shaft cylinder,
The pressurizing writing instrument according to claim 1, wherein the pressing force adjusting mechanism adjusts the pressure by rotating the rotating body. A ball-point pen refill including an ink containing cylinder filled with an ink composition for a writing instrument and a ball-point pen tip in a front portion of the ink containing cylinder is housed in a shaft cylinder,
Behind the ball-point pen refill, the ball-point pen refill is retracted by applying a writing pressure, a pressure-type writing instrument provided with a pressure mechanism for applying pressure to the rear end of the writing instrument ink composition,
Behind the pressurizing mechanism, a rotating body protruding from the rear end of the barrel and a pressing force adjusting mechanism which is operated by rotating the rotating body to adjust the retreat amount of the ball-point pen refill are provided,
The pressurizing mechanism is locked to the shaft cylinder so as not to rotate and to move back and forth,
The rotating body is rotatably locked to the barrel,
The pressing force adjusting mechanism operates by rotating the rotating body, adjusts the pressure applied to the rear end of the ink composition for a writing instrument in the ink containing cylinder, and before and after rotating the rotating body, A pressure-type writing instrument configured such that the relative position of the ball-point pen refill with respect to the shaft cylinder in the axial direction does not change. Inside the shaft cylinder, a slide member that is fixed to the shaft cylinder so as not to rotate and to move back and forth is disposed.
The slide member includes the pressing mechanism arranged inside the slide member, and the rotating body arranged so that a part of the slide member protrudes rearward from a rear end opening of the slide member. Then
The pressurizing writing instrument according to claim 3, wherein a front end portion of the ball-point pen refill is configured to protrude from a front end opening portion of the barrel by pressing the rotating body forward. The pressing force adjusting mechanism includes the slide member, the rotating body that is inserted from a front end opening of the slide member, and is rotatably and longitudinally locked to the slide member, and the inside of the rotating body. And a sliding member locked to the rotating body so as to be rotatable and movable back and forth,
A first cam mechanism for moving the rotating body back and forth with respect to the slide member between the slide member and the rotating body; and a rotating body for the rotating body between the rotating body and the sliding member. And a second cam mechanism that moves the sliding member back and forth with the pressure-type writing instrument according to claim 4. The first cam mechanism is in sliding contact with the inner surface of the slide member, a first cam slant surface that is inclined with respect to the axial direction and extends in the axial circumferential direction, and an outer surface of the rotating body with the first cam slant surface. And a first cam protrusion formed as described above,
The second cam mechanism includes a second cam slant surface inclined to the axial direction and extending in the axial circumferential direction on the outer surface of the sliding member, and a second cam slant surface slidable on the inner surface of the rotating body. The pressure-type writing instrument according to claim 5, further comprising a second cam protrusion formed so as to be in contact with each other. The pressing mechanism includes a tubular body having a through hole penetrating forward and backward, an elastic member disposed inside the tubular body, and having a rear end portion of the ball-point pen refill detachably mounted, and the elastic member. A pressure chamber that is formed between the inner wall of the member and the rear end of the ink containing cylinder and communicates with the rear end opening of the ink containing cylinder, and is arranged inside the tubular body and behind the elastic member. A stopper provided, and an air hole for communicating the pressurizing chamber with the outside,
The tubular body is locked to the slide member so as not to be rotatable and movable back and forth, and the sliding member is locked to the cylinder so as to be movable back and forth and not rotatable.
By disposing an elastic member between the rear inner step portion of the tubular body and the front inner step portion of the sliding member, the tubular body is elastically bulged forward with respect to the sliding member,
By retracting the tubular body together with the ball-point pen refill, the elastic member and the stopper come into contact with each other to deform the elastic member, and the pressure chamber is compressed to compress the ink composition in the ink containing cylinder. The pressure-type writing instrument according to claim 5, wherein pressure is applied to the rear end of the object. A ball-point pen refill including an ink containing cylinder filled with an ink composition for a writing instrument and a ball-point pen tip in a front portion of the ink containing cylinder is housed in a shaft cylinder,
Behind the ball-point pen refill, the ball-point pen refill is retracted by applying a writing pressure, a pressure-type writing instrument provided with a pressure mechanism for applying pressure to the rear end of the writing instrument ink composition,
The pressurizing mechanism has a cylindrical cylinder, an airtight valve that has an airtight deforming portion on the outer peripheral surface and is movable back and forth with respect to the cylinder, and a back and forth movement in a rear inner hole of the cylinder. A freely mounted piston, an airtight member disposed between the piston and the cylinder, surrounded by the cylinder, the airtight valve, the piston and the airtight member, and communicated with a rear portion of the ballpoint pen refill. A pressurizing chamber, and an elastic member that is disposed between the airtight valve and the piston and elastically springs the airtight valve forward,
When writing pressure is applied to the front end of the ball-point pen tip, the ball-point pen refill retracts, and in conjunction with the retraction of the ball-point pen refill, the cylinder and the airtight valve resist the elastic force of the elastic member and the piston. When the writing pressure on the ball-point pen refill is released, the airtight valve moves forward with respect to the piston, while the air-tight valve is retracted, and the pressure chamber is closed and then compressed and pressurized. By this, an air passage that connects the pressurizing chamber and the outside is formed, the airtight state of the pressurizing chamber is released to the same pressure as the atmospheric pressure, and then the cylinder is advanced with a delay. ..   When writing pressure is applied to the front end of the ball-point pen refill, the air-tightness deforming portion of the air-tight valve and the abutting portion of the cylinder come into contact with each other so that the pressure chamber becomes air-tight. When the writing pressure on the refill is released, the fitting force generated between the airtight valve and the contact portion of the cylinder by the airtight deforming portion of the airtight valve causes the piston and the cylinder to be separated from each other by the airtight member. The pressurizing writing instrument according to claim 8, wherein the airtight valve is configured to advance with respect to the piston before the cylinder by increasing a fitting force generated therebetween.   The pressurizing writing instrument according to claim 8 or 9, further comprising a pressing force adjusting mechanism that adjusts the pressure. Further comprising a rotating body provided so as to project from the rear end of the shaft cylinder,
The pressurizing writing instrument according to claim 10, wherein the pressing force adjusting mechanism adjusts the pressure by rotating the rotating body. The writing ink composition is a thermochromic ink,
A friction body which is provided at the rear end of the rotating body and which can rub the handwriting of the thermochromic ink and change the color of the handwriting by frictional heat generated at that time;
A stopper member that allows rotation of the rotating body when the rear end of the shaft cylinder is directed upward, and prevents rotation of the rotating body when the rear end of the shaft cylinder is directed downward. The pressurizing writing instrument according to any one of claims 2 to 7 and 11, which is further provided.