TW202319256A - writing instrument - Google Patents

Abstract

The invention provides a writing instrument which is excellent in designability and does not affect operability. This writing instrument (1) is a Knock-type writing instrument (1) having a shaft tube (10) in which a writing body (20) is housed, and is provided with: a shaft tube (10) in which the front end of the writing body (20) can protrude and retract from the front end of the shaft tube (10); the front end operation mechanism (100) is arranged at the front end of the shaft barrel (10), or at least the front end of the writing body (20) can protrude from the front end of the shaft barrel (10), and the operation body (30) can enable the front end operation mechanism (100) to act, and the operation body (30) is provided with a front end operation mechanism (100) which is arranged at the rear side of the shaft barrel (10) in the direction of the axis A, and a rear end operation mechanism (100) which can enable the front end of the writing body (20) to protrude from the front end of the shaft barrel (10) in a non-writing state at least in a non-pressing state. The front-end operation mechanism (100) is provided with an operation part (33) which is separated from the rear end of the shaft tube (10), and a pressing part (31) which is configured in the shaft tube (10) and is linked with the operation part (33) to press the front-end operation mechanism (100) when the operation part (33) is pressed.

Description

writing instrument

The present invention relates to: writing instrument.

The known writing instrument is equipped with: a shaft cylinder, a writing body accommodated inside the shaft cylinder, a front end operating mechanism that can make the front end of the writing body protrude from and retract into the front end of the shaft barrel, and an operation that can make the front end operating mechanism actuate department. In this type of writing instrument, the operating part is inserted into and held at the rear end of the barrel, and by touching the operating part, the front-end operating mechanism can be pressed and actuated (see Patent Document 1). [Prior Art Literature] [Patent Document]

[Patent Document 1] Japanese Patent Laid-Open No. 2020-142500

[Problem to be solved by the invention]

The writing instrument disclosed in Patent Document 1 is limited to a design in which the operation portion and the front end operation mechanism are connected within the barrel from the viewpoint of operability and component strength.

An object of the present invention is to provide a writing instrument that is more excellent in design without affecting operability. [Technical means to solve the problem]

In order to solve the above-mentioned problems, the writing instrument provided by the present invention is a writing instrument of the Knock type having a shaft tube containing writing materials inside, wherein the front end of the writing body can be moved from the shaft tube The front end of the front end protrudes and retracts, or at least the front end of the writing body can protrude from the front end of the aforementioned shaft cylinder. The front end operating mechanism and the operating body that can make the aforementioned front end operating mechanism actuate, the aforementioned operating body then has: The rear side of the shaft cylinder in the axial direction is at least in the non-writing state when it is not pressed, and is an operation part kept apart from the rear end of the shaft cylinder, and is arranged inside the shaft cylinder. When the operation part is When pressed, it is a pressing part that is linked with the operation part and presses the front end operation mechanism.

The said operation part may be arrange|positioned at the position which passes the said axis|shaft.

A part of the aforementioned operating portion may also enter the interior of the aforementioned shaft barrel from the rear end of the aforementioned shaft barrel when pressed.

The operation body may include a connecting portion for connecting the pressing portion and the operation portion.

The operating body may include a clip portion extending continuously from the connecting portion toward the front side on the outer side of the barrel.

The operating body may also be capable of rotating about a clip rotation shaft extending in a direction perpendicular to the axis, so that the front side of the clip part is separated from the shaft cylinder.

The aforementioned connecting portion may also be in the shape of a ㄇ character. [Effect of Invention]

According to the present invention, it is possible to provide a writing instrument that is excellent in design and does not affect operability.

(first embodiment)

Hereinafter, a writing instrument according to a first embodiment of the present invention will be described. In the first embodiment, the example of the ballpoint pen 1 is given as a writing implement.

FIG. 1 is a sectional view of a ballpoint pen 1 according to the first embodiment; FIG. 2 is an exploded perspective view of the ballpoint pen 1 . The ballpoint pen 1 is provided with: a shaft barrel 10, a writing body 20 accommodated in the shaft barrel 10, a front end operating mechanism 100 that can make the front end of the writing body 20 protrude and retract from the front end of the shaft barrel 10, and The operation body 30 that operates the front end operation mechanism 100 by moving back and forth relative to the shaft cylinder 10 with a stroke length of . In the following description, the front end side of the writing element 20 in the ballpoint pen 1 is referred to as the front, and the opposite side thereof is referred to as the rear. The ballpoint pen 1 further includes: a pen clip spring 110 that pushes the operating body 30 , and a tail plug 120 disposed at the rear end of the front end operating mechanism 100 .

In addition, the "time of touch" referred to in this specification means a state where a touch operation is being performed on the operation body 30 (operating unit 33 described later). In addition, the term "full touch" refers to a state in which the operation part 33 is pushed to the bottom (most front side) during the touch operation. It should be noted that the “non-touch state” refers to a state in which no touch operation is performed on the operation unit 33 . Specifically, "when not touching pressure" includes: the non-writing state in which the front end of the writing body 20 is retracted inside the front end of the shaft cylinder 10 (please refer to FIG. A writing state in which the front end of the writing element 20 protrudes from the front end of the barrel 10 when the pressing action is performed (please refer to FIG. 10 ).

(spool 10) The shaft tube 10 includes a front shaft tube 11 extending along the shaft tube axis A1 and a rear shaft tube 12 connected to the rear end of the front shaft tube 11 . The rear shaft tube 12 is integrally fitted with an inner tube 50 described later, and the inner tube 50 and the front shaft tube 11 are connected together by screwing. In the first embodiment, the barrel axis A1 coincides with the axis A of the ballpoint pen 1 . The barrel 10 is made of, for example, a metal material such as aluminum. The barrel 10 is not limited to metal material, and may be formed of resin material such as polycarbonate.

(front axle tube 11) The front shaft barrel 11 is pointed and cylindrical, with an opening 11a through which the front end of the writing element 20 protrudes and retracts through the front end along the axis A direction. On the inner surface of the rear end side of the front shaft cylinder 11, a female screw portion 11b is formed.

(rear axle tube 12) The rear axle tube 12 is cylindrical in shape, and its rear side is extended along the front-rear direction to form: when touching and pressing, the sliding groove 13 for the protrusion 37 of the operating body 30 to be described later and the sliding groove 13 for the operating body to slide are formed. The slit 14 for the movement of the first wrist portion 32 of 30. The length of the sliding groove portion 13 and the slit 14 in the front-rear direction corresponds to the stroke length when the operating body 30 is pressed. Furthermore, in the first embodiment, the protruding portion 37 of the pen grip portion 36 of the operating body 30 floats up slightly from the bottom surface of the sliding groove portion 13 of the rear axle tube 12, and the apex of the protruding portion 37 is located at a lower position than the rear axle. The position on the inner side of the outer surface of the cylindrical shape of the barrel 12 . By providing the sliding groove portion 13 , even if the object to be gripped by the clip is thin, it can be held between the sliding groove portion 13 and the protruding portion 37 .

(handwriting 20) The writing body 20 is housed inside the barrel 10 and extends along the writing body axis A2. In the first embodiment, the writing axis A2 coincides with the axis A. In the first embodiment, the writing body 20 is a refill for a ballpoint pen, and is equipped with: a ballpoint pen nib 21, an adapter 22 arranged on the rear side of the writing body axis A2 of the ballpoint pen nib 21, and an adapter 22 connected to the adapter. The ink storage tube 23 of the head 22. The adapter 22 has a flange portion on the side of the ink storage tube 23 , and the front surface of the flange portion constitutes a spring receiving surface 24 .

FIG. 3 is an enlarged exploded view of the operating body 30 and the front end operating mechanism 100 . FIG. 4 is an enlarged assembly view of the operating body 30 and the front end operating mechanism 100 . Fig. 5 is a sectional view of the rear end of the ballpoint pen 1 in a non-writing state when there is no contact pressure. 6 is a cross-sectional view showing the rear end of the ballpoint pen 1 in a state where the front side of the clip portion 36 of the operating body 30 is lifted up in a direction away from the barrel 10 . 7 and 8 are diagrams showing the operation of the front end operation mechanism 100 .

(operator 30) The operating body 30 is made of, for example, a metal material called an aluminum die-casting part such as ADC12, a zinc die-casting part such as ZDC2, or polycarbonate, or acrylonitrile-butadiene-styrene copolymer (ABS). It is made of similar resin and is used to operate the front end operating mechanism 100 . If the operation body 30 is made of a metal material, rigidity can be obtained and thus it is suitable.

The operating body 30 is provided with: a pressing part 31 arranged inside the shaft cylinder 10, a first arm part 32 extending from the pressing part 31 to the outside of the outer side of the shaft cylinder 10, and a rear side of the axis A direction of the shaft cylinder 10. , and at least in the non-writing state when there is no contact pressure, it is the operating part 33 kept apart from the rear end of the shaft cylinder 10, the second arm part 34 extending from the operating part 33 to the radially outer side of the axis A, and the second wrist part 34 connected with the second The connecting portion 35 between the first arm portion 32 and the second arm portion 34, the clip portion 36 extending from the connecting portion 35 to the front side, the protruding portion 37 provided inside the clip portion 36, the clip rotating shaft 38, and the clip Movable regulation part 39. The first arm portion 32 , the second arm portion 34 and the connection portion 35 together constitute a connection portion for connecting the pressing portion 31 and the operation portion 33 . In the first embodiment, although the operation body 30 is constituted by a single component, for example, the connecting portion and the operation portion 33 may be constituted by different components.

The "operating part 33" referred to here is arranged "on the rear side of the axis A direction of the shaft cylinder 10", which means: when viewed from one of the axes A, the operating part 33 is located on the inner diameter side of the shaft cylinder 10 inside meaning. In the first embodiment, the axis of the operation part 33 and the axis of the barrel 10 are the same axis.

The pressing portion 31 has a substantially rectangular plate shape extending in a direction substantially perpendicular to the axis A. As shown in FIG. The front surface of the pressing portion 31 is a substantially flat surface substantially perpendicular to the axis A. As shown in FIG. On the other hand, the front wall 91b of the pressing part storage chamber 91 for accommodating the pressing part 90 described later for the pressing part 31 is also substantially perpendicular to the axis A. As shown in FIG. Therefore, the front surface of the pressing part 31 is in surface contact with the front wall 91b of the pressing part storage chamber 91, and can press the front wall 91b. Therefore, the pressing force of the pressing portion 31 can be efficiently transmitted to the pressing body 90 .

As shown in Figures 5 and 6, at the end of the pressing part 31 on the opposite side of the pen holder 36 across the axis A, there is a cylindrical protrusion protruding from both sides, that is, the pen holder rotation shaft 38. . The rotation axis B (please refer to FIG. 3 ) passing through the two clip rotation shafts 38 arranged on both sides is perpendicular to the axis A. The operating body 30 is rotatable around the rotation axis B. As shown in FIG. The pressing portion 31 is a substantially rectangular plate extending in a direction substantially perpendicular to the axis A, and has a thickness substantially equal to the outer diameter of the clip rotating shaft 38 . The clip rotation shaft 38 is provided at an end of the pressing portion 31 opposite to the clip portion 36 across the axis A, and at a position on the front end side of the pressing portion 31 . With such a structure, when the operating body 30 is rotated around the clip rotation shaft 38 (rotation axis B) so as to separate the front side of the clip portion 36 from the barrel 10, the pressing portion 31 does not move. The pressing body 90 is pressed toward the front side. Moreover, it can be made into a compact and miniaturized pen holder rotating structure.

The first arm portion 32 extends from the pressing portion 31 to the connecting portion 35 side on the radially outer side of the axis A, and protrudes from the outer surface of the shaft cylinder 10 . The end surface of the first arm portion 32 on the pressing portion 31 side serves as a spring pressing surface 32a.

On both side surfaces of the connecting portion between the first arm portion 32 and the pressing portion 31, there are provided cylindrical protrusions protruding from the two side surfaces, that is, clip movable regulation portions 39 . The clip movable regulation portion 39 is used to constrain the movement of the operating body 30 in the direction of rotation when the operating body 30 rotates around the pen clip rotating shaft 38 .

In the first embodiment, the operation part 33 is substantially in the shape of a truncated cone, and is disposed on the rear side in the direction of the axis A of the shaft cylinder 10 , and the bottom surface of the truncated cone faces the front side, that is, the shaft cylinder 10 side. The operation part 33 is kept apart from the rear end of the shaft cylinder 10 when it is not pressed as shown in FIG. 5 . That is, when there is no contact pressure, there is a gap between the operation part 33 and the rear end of the shaft cylinder 10 . The outer diameter of the operating portion 33 is slightly smaller than the inner diameter of the rear end of the shaft cylinder 10 . Furthermore, when pressing is performed, a part of the operation part 33 will enter the interior of the rear end of the shaft cylinder 10 .

In addition, the operation part 33 passes through the axis A in the state where the operation body 30 shown in FIG. 5 is not rotated. In the first embodiment, the operation unit 33 is arranged around the axis A. As shown in FIG.

The second arm portion 34 extends radially outward of the axis A from the operation portion 33 . The second arm portion 34 is substantially parallel to the first arm portion 32 when viewed from the side. The width of the second arm portion 34 in the radial direction of the axis A is substantially the same as the width of the first arm portion 32 and is such that it can enter the slit 14 .

The connecting part 35 connects the first arm part 32 and the second arm part 34 together. The connecting portion formed by the first arm portion 32 , the connecting portion 35 and the second arm portion 34 is in the shape of a ㄇ when viewed from the side of the shaft cylinder 10 , and is used to connect the pressing portion 31 and the operating portion 33 . Since the rigidity can be increased by configuring the connection part as a single integral part, it is preferable.

The clip portion 36 is integrally continuous from the connecting portion 35 and extends to the front side along the outer surface of the barrel 10 . A semicircular protruding portion 37 is provided on the surface facing the barrel 10 on the front side of the pen clip portion 36 .

As mentioned above, when pressing, the protruding portion 37 slides on the sliding groove portion 13 provided on the shaft cylinder 10 , and the first arm portion 32 moves in the slit 14 . In addition, the second arm portion 34 enters the slit 14 from the rear end of the slit 14 . (Please refer to Figure 9)

(Front end operating mechanism 100) The tip operating mechanism 100 is a mechanism capable of protruding and retracting the tip of the writing element 20 from the tip of the barrel 10 . In the first embodiment, the front-end operating mechanism 100 is equipped with: the front spring 40, the inner cylinder 50 for accommodating the writing body 20, the pushing element 70, the pressing body 90, and the pushing element 70 and the pressing body 90. between the rotating element 80 and the rear spring 60 . However, the front-end operating mechanism is not limited to such a mechanism as long as it can make the front end of the writing body protrude and retract from the front end of the shaft cylinder, or at least make the front end of the writing body protrude from the front end of the shaft cylinder. structure.

(front spring 40) The front spring 40 shown in FIGS. 1 and 2 is, for example, a compression coil spring made of stainless steel. The front spring 40 is inserted into the outer peripheral surface of the adapter 22 on the front side of the writing body 20, and the front end abuts against the step portion provided on the inner surface of the front shaft cylinder 11, and the rear end abuts against the inner surface of the adapter. The spring receiving surface 24 of the flange portion of the 22 pushes the writing body 20 toward the rear side, and pushes the pushing element 70 toward the rear side via the writing body 20 .

(inner cylinder 50) The inner cylinder 50 is a cylindrical member, and has an inner cylinder front portion 50F, an inner cylinder middle portion 50M, and an inner cylinder rear portion 50B. The inner cylinder 50 is fixed on the shaft cylinder 10 . The outer surface of the middle part 50M of the inner cylinder is provided with: a protrusion 50a surrounding the entire circumference of the front side, and four ribs 50b along the axis A direction behind the protrusion 50a. The outer surface of the inner cylinder middle part 50M is fitted with the inner surface of the rear axle cylinder 12, and the inner cylinder 50 and the rear axle cylinder 12 are fixed in a state where the inner cylinder front part 50F protrudes from the front end of the rear axle cylinder 12. The 50 can neither move forward or backward nor rotate.

On the outer surface of the front part 50F of the inner cylinder, there is formed a male screw part 51 capable of screwing with the female screw part 11b of the front shaft cylinder 11, and the front shaft cylinder 11 is fixed by screwing with the inner cylinder 50. Can be disassembled. By detaching the front barrel 11, the writing body 20 accommodated therein can be taken out. The diameter of the inner cylinder rear portion 50B is smaller than that of the inner cylinder middle portion 50M, and a step portion 52 is provided at a portion where the inner cylinder middle portion 50M and the inner cylinder rear portion 50B are connected. The rear spring 60 is fitted outside the inner tube rear portion 50B, and the front end of the rear spring 60 abuts against the stepped portion 52 .

Two notches 54 extending from the rear end to the front side are provided on the inner cylinder rear portion 50B. The part other than the notch part 54 of the inner cylinder rear part 50B is the extension part 55 extended to the rear side. As shown in FIG. 3 , at the rear end of the extension portion 55 , a rear end protrusion 56 protruding toward the inner diameter side is provided. On the inner surface of the extension portion 55 more forward than the rear end protrusions 56, an inner surface circumferential protrusion 58 is provided. Between the rear protruding portion 56 and the inner peripheral protrusion 58, a large-diameter portion 81 of the rotating element 80 to be described later is held so as to constrain the movement of the rotating element 80 in the axis A direction.

On the outer peripheral surface of the rear end of the extension portion 55, an outer peripheral protrusion 57 is provided. The rear surface of the outer peripheral protrusion 57 abuts against the rear axle tube step portion 15 (not shown) on the inner surface of the rear axle tube 12 . In this way, the rear position of the inner tube 50 relative to the rear axle tube 12 in the direction of the axis A is constrained, so that the inner tube 50 can be prevented from passing through to the rear of the rear axle tube 12 . The front surface of the outer peripheral protrusion 57 abuts against the rear end of the rear spring 60 together with the front surface of the pressure-contact flange portion 96 of the pressure-contact body 90 to be described later when not in contact pressure.

(pushing element 70) The urging member 70 rotatably holds the rotating member 80 and is movable in the axis A direction relative to the inner cylinder 50 . The urging member 70 has a urging member pressing surface 71 disposed on the front side. The pressing member pressing surface 71 is arranged on the front side in the direction of the axis A of the inner peripheral protrusion 58 of the inner cylinder 50 . Slide parts 72 are provided at two places on the outer periphery of the urging member pressing surface 71 . Insert the sliding part 72 into the two notches 54 of the inner tube 50 , so that the pushing element 70 can slide forward and backward along the notches 54 . Furthermore, the outer diameter of the sliding portion 72 of the pushing element 70 is smaller than the inner diameter of the rear spring 60 . The urging member 70 also has a cylindrical portion 73 extending rearward from the urging member pressing surface 71 . On the outer peripheral portion of the cylindrical portion 73 other than the rear end side, there are three cam-forming thickened portions 74 extending along the axis A direction. In addition, a stepped surface 77 extending parallel to the axis A is provided between the cam surfaces of the pushing element cam 75 . The thickened portion 74 for forming the cam does not cover the entire circumferential direction of the front outer periphery of the cylindrical portion 73, but between the three thickened portions 74 for forming the cam, three pushing elements extending parallel to the axis A are provided. Ditch 76.

(contact pressure body 90) The pressing body 90 has: the pressing portion 31 for storing the operating body 30 at the rear end and the pressing portion storage chamber 91 of the clip spring 110; The pressing slide part 95 and the pressing cam 94 provided on the front surface of the front wall 91 b of the pressing part housing chamber 91 .

The pressing part storage chamber 91 has two side walls 91a and a front wall 91b facing each other, and an engagement protrusion 91c is provided on the outer surface of the side walls 91a. Insert the engaging protrusion 91 c into the engaging hole 124 of the tail bolt 120 described later, and the tail bolt 120 can be installed on the pressure contact body 90 . The inner surface of the side wall 91a is provided with: a shaft holding recessed portion 91d for rotatably holding the pen holder rotating shaft 38, and a pen holder rotating shaft 38 capable of holding the pen holder movable regulation portion 39 in the shaft holding recessed portion 91d. As the center, the movable recess 91e moves toward the outer peripheral direction.

The pressing sliding portion 95 extends forward from the pressing portion storage chamber 91 . The pressing sliding portion 95 can slide and move along the axis A direction in the notch portion 54 of the inner tube 50 . A pressing flange portion 96 is formed on the outer periphery of the front end of the pressing sliding portion 95 . The outer diameter of the pressing flange portion 96 is larger than the outer diameter of the sliding portion 72 of the pushing element 70 . The front surface of the pressing flange portion 96 abuts against the rear end side of the rear spring 60 , so the pressing body 90 is pushed toward the rear side by the rear spring 60 . The pressing body 90 abuts against the stepped portion 15 of the rear shaft tube 12 by the rear surface of the pressing flange portion 96 , so that the movement of the pressing body 90 to the rear of the axis A of the shaft tube 10 is constrained.

The pressing cam 94 is provided on the front surface of the front wall 91b of the pressing portion housing chamber 91 and faces the front side. A stepped surface 97 extending parallel to the axis A is provided between the cam surfaces of the pressing cam 94 .

(rotating element 80) The rotating element 80 is cylindrical and has a large diameter portion 81 and a small diameter portion 82 for inserting the cylindrical portion 73 of the pushing element 70 . The large-diameter portion 81 of the rotating element is arranged between the inner circumferential protrusion 58 of the inner tube 50 and the rear-end protrusion 56 . Under the non-writing state during non-contact pressure, the urging element 70 is clamped between the rear end surface of the ink storage tube 23 of the writing body 20 and the front wall 91b (the front wall 91b of the front wall 91b) of the pressing part accommodation chamber 91 of the contact body 90. between the front end of the cylindrical part). Also, at this point in time, the rotary member 80 is sandwiched between the urging member pressing surface 71 and the rear-end protruding portion 56 .

Because the inner cylinder 50 does not move in the axis A direction of the ballpoint pen 1, although the rotating element 80 held between the inner surface circumferential protrusion 58 and the rear end protrusion 56 of the inner cylinder 50 moves in the axis A direction, The movement of is also restricted, however, the rotating element 80 can rotate around the axis A between the inner peripheral protrusion 58 and the rear end protrusion 56 . Therefore, in order to be able to rotate the rotating element 80 between the inner surface circumferential protrusion 58 and the rear end protrusion 56, with the axis A as the center, the inner surface circumferential protrusion 58 and the rear end protrusion 56 are aligned on the axis A. The distance in the direction must be a clearance distance slightly larger than the width of the large-diameter portion 81 of the rotating element 80 in the direction of the axis A.

However, in the non-writing state at the time of non-touch pressing, the front surface of the small-diameter portion 82 of the rotating element is in contact with the rear surface of the pressing element pressing surface 71 . Utilize the front spring 40 to push the pushing element 70 to the rear side through the writing body 20. Therefore, the front surface of the rotating element small-diameter portion 82 of the rotating element 80 is also pushed forward by pressing the pushing element on the rear surface of the face 71. Push back. In this way, the rotating member 80 is held between the urging member pressing surface 71 and the rear-end protruding portion 56 of the inner tube 50 without any gap. Also, in the non-contact writing state, the front surface of the cam member 83 to be described later of the rotary element 80 , that is, the urging element abutting surface 84 abuts on the urging element cam 75 of the urging element 70 . Because the pushing element 70 is pushed backward by the front spring 40 through the writing body 20, the front surface of the cam member 83 of the rotating element 80, that is, the pushing element abutting surface 84, is moved backward through the pushing element cam 75. Push sideways. In this way, the rotating member 80 is held without gap between the urging member cam 75 and the rear end protrusion 56 of the inner cylinder 50 . Therefore, it is possible to prevent the rotating member 80 from shaking in the axis A direction at any time during non-contact pressing (including writing state and non-writing state), in other words, during periods other than contact pressing.

On the inner surface of the rotary element 80, three cam members 83 are formed at equal intervals. In FIGS. 7 and 8 , only one cam member 83 is shown in the rotating element 80 for convenience of explanation. The front surface of the cam member 83 is used as: the urging element abutting cam 84 that abuts against the urging element cam 75 of the urging element 70; 94 abuts against the contact pressure abutting cam 85; the side surface of the cam member 83 is used as: the sliding surface 86 that slides in the pushing element groove 76.

(rear spring 60) The rear spring 60 is, for example, a stainless steel compression coil spring, and is disposed between the stepped portion 52 of the inner tube 50 and the contact flange portion 96 of the contact body 90 in a compressed state clamped to be shorter than its natural length. between. The rear spring 60 is used to push the pressing body 90 to the rear side at all times, and the pressing part 31 of the operating body 30 is pushed to the rear side through the pressing body 90, so that the operating body 30 as a whole is pushed to the rear side. . In this way, even in the writing state, the operating portion 33 of the operating body 30 is at the rear side of the shaft barrel 10 and is always kept separated from the shaft barrel 10 .

(pen clip spring 110) The clip spring 110 is, for example, a stainless steel compression spring, and is disposed in the pressing portion storage chamber 91 . The clip spring 110 is configured such that the central axis of the spring is perpendicular to the axis A and perpendicular to the rotation axis B. One end of the clip spring 110 is placed on a pedestal 123 of the tail plug 120 described later, and the other end of the clip spring 110 is pressed by the spring pressing surface 32a of the first arm 32 of the operating body 30. suppress. In other words, the pen clip spring 110 is compressed to be shorter than its natural length, and is sandwiched between the base 123 of the end bolt 120 and the spring pressing surface 32a of the first wrist portion 32 to be elastically pushed.

In the state where the pressing force for pressing in the direction substantially perpendicular to the axis A has not been applied to the rear side of the operating body 30 (connecting portion 35 ), since the front surface of the pressing portion 31 of the operating body 30 abuts against the contacting body 90 is the rear surface of the front wall 91b, so the movement of the operating body 30 toward the front of the pen holder 36 is restricted.

The protruding portion 37 on the front side of the pen clip portion 36 of the operating body 30 is not in contact with the shaft cylinder 10 but is in a state of floating slightly from the bottom surface of the sliding groove portion 13. Between 10 can produce sufficient clamping force. And by making it into such a structure, it is possible to prevent the protrusion 37 of the pen holder 36 from rubbing against the barrel 10 to cause scratches.

As shown by the arrow in FIG. 6 , a pressing force for pressing in a direction substantially perpendicular to the axis A is applied to the rear side of the operating body 30 (connecting portion 35 ), so that the front side of the clip portion 36 of the operating body 30 moves toward the rear side. If the direction away from the barrel 10 is lifted up, the clip spring 110 will be more compressed. After the pressing force is released, the clip part 36 is restored to its original state from the lifted state by the restoring force of the clip spring 110 .

(tail bolt 120) The tail plug 120 includes: a rear wall 121 for blocking the rear end of the pressing portion accommodation chamber 91 of the pressing body 90 , a pedestal 123 extending forward from the rear wall 121 , and two engaging walls 122 facing each other. An engaging hole 124 is provided on the engaging wall 122 . By engaging the engaging protrusion 91 c of the pressing body 90 into the engaging hole 124 , the tail plug 120 is attached to the pressing body 90 . When there is no contact pressure, the opening at the rear end of the shaft barrel 10 is covered by the rear wall 121 of the tail bolt 120 . When the operation part 33 is touched and pressed, the rear wall 121 of the tail bolt 120 will be linked with the movement of the operation part 33 to the front side, and move forward from the rear end of the shaft cylinder 10, so that the operation part 33 Access to the interior of the rear end of the shaft cylinder 10 is possible. Moreover, in the first embodiment, the outer diameter of the operating part 33 is only slightly smaller than the inner diameter of the rear end of the shaft cylinder 10, and when pressing, a part of the front side of the operating part 33 will enter the inside of the rear end of the shaft cylinder 10, In this way, the movement of the operation part 33 in a direction other than the axis A is restricted.

(Characteristics of the operating body 30) Next, the features of the operating body 30 of the first embodiment will be described. FIG. 9 is an internal view showing the rear end of the ballpoint pen 1 when fully pressed, and the barrel 10 is indicated by a dotted line. FIG. 10 is an internal view showing the rear end of the ballpoint pen 1 in the writing state at the time of non-contact pressure, and the barrel 10 is indicated by a dotted line. As shown in Figure 9, when fully touching and pressing, the operating part 33 of the operating body 30 moves to the front side and a part enters the inside of the rear end of the shaft cylinder 10, but, in the non-writing state (Figure 5) when not touching and pressing And in the non-contact writing state shown in FIG. 10 , the operating portion 33 as a whole is kept separate from the rear end of the shaft barrel 10 .

Therefore, when there is no contact pressure, the operation part 33 is separated from the rear end of the shaft cylinder 10, and there is a gap between the operation part 33 and the shaft cylinder 10, so that the operation part 33 is like floating in the air. Excellent design. In other words, in addition to the non-writing state shown in FIG. 7(a), in the writing state shown in FIG. 10, the writing instrument (ball pen 1) of the first embodiment can have General excellent design.

When the operation part 33 is pressed toward the front side in the direction of the axis A, a part of the operation part 33 enters the inside of the rear end of the shaft cylinder 10 as shown in FIG. 9 . At this time, the pressing force of the operating part 33 will be transmitted to the pressing part 31 through the connecting part that is connected in a "ㄇ" shape, that is, the second arm part 34, the connecting part 35 and the first arm part 32 of the operating body 30. 31 just presses against the pressing body 90 . Here, since the operating portion 33 is disposed at a position passing through the axis A of the shaft cylinder 10 , the pressing force of the operating portion 33 can be efficiently transmitted to the pressing portion 31 . In addition, since the operation part 33 and the pressing part 31 are connected together by the "ㄇ"-shaped connecting part, the pressing force of the operation part 33 can be efficiently transmitted to the pressing part 31 in terms of this structure alone. up. In addition, the operating body 30 is made of a metal material called aluminum die-casting such as ADC12, zinc die-casting such as ZDC2, polycarbonate, or acrylonitrile-butadiene-styrene copolymer (ABS). made of resins. In particular, if the ㄇ-shaped connecting portion is integrally manufactured with a high-strength hard metal material, the force pressed against the operating portion 33 can be fully transmitted to the pressing portion 31 without deforming the connecting portion. Operability is very good. Furthermore, the connecting portion in the first embodiment is made very thin compared with the outer diameters of the operating portion 33 and the shaft cylinder 10, so the operating portion 33 can obtain an excellent design as if it is floating in the air. .

(The action when the pen clip holds the object) Next, the operation of the operation part 33 when holding objects with the pen clip will be described. As indicated by arrows in FIG. 6 , the rear side of the operation body 30 (connection portion 35 ) is pressed in a direction substantially perpendicular to the axis A. As shown in FIG. In this way, the operating body 30 rotates around the clip rotation shaft 38 held in the shaft holding recessed portion 91d. The clip movable regulating portion 39 moves around the clip rotating shaft 38 in the movable concave portion 91e provided on the side wall 91a of the pressing portion storage chamber 91 of the pressure contact body 90 . In other words, the movement of the clip movable regulation portion 39 will be constrained because the clip movable regulation portion 39 abuts against the rear end of the movable concave portion 91e. The clip spring 110 will be pressed by the spring pressing surface 32a of the first arm portion 32 to be compressed.

In this way, the front side of the clip part 36 is lifted up in the direction away from the barrel 10, and the protruding part 37 is separated from the sliding groove 13 of the barrel 10, so that the gripping object of the clip can be clamped. thing. If the pressing is released from this state, between the pen clamp portion 36 and the outer surface of the shaft tube 10, an object to be clamped, such as cloth in a pocket of clothes, will be clamped, and the ballpoint pen 1 can be inserted and fixed on the clothes. pocket etc.

(Operation of front end operating mechanism 100) Next, the operation of the distal end operating mechanism 100 will be described. Although Fig. 7 and Fig. 8 are the figure that shows the action of front-end operation mechanism 100, do not show: inner tube 50, front spring 40 and rear spring 60, and rotating element 80 also only shows a cam that is located at the inner surface Member 83 only. The single-dot chain line in the figure indicates: the center of the cam member 83 of the cam member 83 of the rotary element 80 in the axis A direction. Because the rotating element 80 is located at a fixed position in the direction of the axis A relative to the ballpoint pen 1 , the single-dot chain line is a fixed position in the direction of the axis A of the ballpoint pen 1 .

FIG. 7( a ) shows the non-writing state of the ball pen 1 . The so-called "non-writing state" refers to: the operating portion 33 of the operating body 30 has not been pressed, and the front end of the writing body 20 has not yet protruded from the front end of the shaft tube 10 (retracted inside the shaft tube 10 status). At this time, with respect to the rotating element 80, the pressing body 90, the pushing element 70 and the writing body 20 are located at the rearmost side in the movable range, and the cam member 83 of the rotating element 80 is positioned on the push side of the pushing element 70. The front side of the forcing element groove 76.

Fig. 7(b) shows the state in which the operation starts after switching from the non-writing state to the writing state. When switching from the non-writing state to the writing state, the operator performs a touch operation on the operation portion 33 of the operation body 30 . In this way, the operating body 30 moves forward when pressed by the operating portion 33 . Because the pressing portion 31 of the operating body 30 presses the pressing body 90 forward, the pressing body 90 , the pushing element 70 and the writing body 20 move forward as indicated by the arrows in the figure. Because the rotating element 80 is located at a fixed position on the axis A direction for the ballpoint pen 1, therefore, when the pushing element 70 moves to the front side, the plane extending toward the axis A direction is the cam member 83 (rotating element 80 ) will relatively move to the rear side along the plane extending in the direction of the axis A, that is, the side of the pushing element groove 76 of the pushing element 70 .

FIG. 7( c ) is a state in which the operator further presses the operation portion 33 of the operation body 30 forward from the state in FIG. 7( b ). It is shown that: the cam member 83 (rotation element 80) passes through the urging element groove 76 of the urging element 70, and the slope on the rear side of the cam member 83 (rotation element 80) is the abutting cam 85 abutting on the cam member 83 (rotation element 80). The slope on the front side of the pressing body 90 is the state when pressing the cam 94 . At this time, the contact cam 94 of the contact body 90 presses the contact cam 85 of the cam member 83 (rotary element 80) to the front side, so the contact cam of the cam member 83 (rotary element 80) 85 will slide along the pressing cam 94 of the pressing body 90 . In this way, the rotating element 80 will start to rotate in the direction of the arrow.

FIG. 7( d ) shows the state where the operation portion 33 of the operation body 30 is completely pressed. FIG. 9 is an internal view showing the rear end of the ballpoint pen 1 at the time of this full touch. When the rotating element 80 rotates, the plane extending in the direction of the axis A, that is, the sliding surface 86 of the cam member 83 (rotating element 80 ), touches the plane extending in the direction of the axis A, that is, the stepped surface 97 of the pressing body 90 , the rotation of the rotary member 80 is stopped. Here, the position of the rotating element 80 in the direction of the axis A is fixed, and the pressing cam 94 of the pressing body 90 is abutting against the pressing abutment cam 85 of the cam member 83 (rotating element 80 ), therefore, the pressing The pressing body 90 cannot move further to the front side. In this way, the operation portion 33 of the operation body 30 cannot move further to the front side. Therefore, the operator will feel that the pressing body 90 has reached the maximum pressing depth.

FIG. 7( e ) shows a state after the operator releases pressing the operation portion 33 of the operation body 30 after reaching the longest pressing depth. Once the operator releases the operation portion 33 of the operating body 30, the rear spring 60 pushes the pressing flange portion 96 of the pressing body 90 to the rear, so that the pressing body 90 moves rearward. The writing body 20 is also pushed backwards by the front spring 40, so it will move slightly to the rear side. Pushed by the writing body 20, the pushing element 70 will also move slightly to the rear side. If the urging element 70 moves backward, the inclined surface on the rear side of the urging element 70 is the pushing element cam 75, which will abut against the inclined surface on the front side of the cam member 83 of the rotating element 80, that is, pushing The element abuts the cam 84 . In this state, the urging member cam 75 of the urging member 70 pushes the urging member of the cam member 83 (rotation member 80) against the cam 84 to the rear side, therefore, the cam member 83 (rotation member 80) The urging member abutting cam 84 will slide along the urging member cam 75 of the urging member 70, and the rotating member 80 will rotate toward the arrow.

Fig. 8(a) is a continuation of Fig. 7(e), which shows that when the rotating element 80 rotates, the plane extending in the direction of the axis A is in front of the sliding surface 86 of the cam member 83 (rotating element 80). The side part abuts against the plane extending in the direction of the axis A, that is, the step surface 77 of the pushing element 70, so that the rotating element 80 stops rotating. In this state, the urging member cam 75 of the urging member 70 has abutted against the urging member abutment cam 84 of the cam member 83 (rotation member 80), and therefore, the urging member 70 does not go further to the rear side. move. At this time, the front end of the writing body 20 protrudes from the front end of the shaft barrel 10 , and the rear end of the writing body 20 abuts against the pushing member pressing surface 71 of the pushing member 70 . Because the pushing element 70 will not move further to the rear side, therefore, the writing body 20 will not move further to the rear side either. In other words, even if there is a reaction force of pen pressure applied to the front end of the writing body 20 during writing, the front end of the writing body 20 will not retreat into the shaft cylinder, and thus remains in a state where writing can be performed. This state is the so-called writing state.

Fig. 10 is the same writing state as Fig. 8(a). Because the pressure-contact flange portion 96 of the pressure-contact body 90 is pushed backward by the rear spring 60, the pressure-contact body 90 is pushed by the rear spring 60 to move backward until the rear surface of the pressure-contact flange portion 96 reaches to the position of the rear axle tube step portion 15 of the rear axle tube 12 . In this way, the pressing portion 31 of the operating body 30 is also pushed backward by the push of the pressing body 90 . Even in the writing state, the operating portion 33 of the operating body 30 is on the rear side of the shaft cylinder 10 , is also maintained in a state separated from the shaft cylinder 10 . Therefore, even when the ballpoint pen 1 is in the writing state, it is possible to maintain the excellent design of the operation part 33 as if it is floating in the air.

Fig. 8(b) shows the state in which the operation starts after switching from the writing state to the non-writing state. In other words, it is the initial state when the front end of the writing element 20 is retracted from the front end of the barrel 10 to the inside of the barrel 10 . When switching from the writing state to the non-writing state, the operator performs a touch operation on the operation portion 33 of the operation body 30 . In this way, the operating body 30 moves forward when pressed by the operating portion 33 . Since the pressing part 31 of the operating body 30 presses the pressing body 90 to the front side, the pressing body 90 , the pushing member 70 and the writing body 20 move to the front side. At this time, the movement amount of the pressing body 90 , the pushing element 70 and the writing body 20 is smaller than the movement amount when switching from the non-writing state to the writing state.

As shown in Figure 8 (b), the inclined surface on the rear side of the pushing element 70 is the pushing element cam 75 of the pushing element 70, and the inclined surface on the front side of the rotating element 80 is separated from the pushing element abutting cam 84. The plane extending toward the axis A of the forcing element 70, that is, the step surface 77 of the pushing element 70, is separated from the plane extending toward the axis A, that is, the sliding surface 86 of the cam member 83 (rotating element 80). Then, the inclined surface provided on the front side of the pressing body 90, that is, the pressing cam 94 of the pressing body 90 abuts against the inclined surface provided on the rear side of the rotating element 80, that is, the pressing contact of the cam member 83 (rotating element 80). Connect to cam 85. The contact cam 94 of the contact body 90 presses the contact cam 85 of the cam member 83 (rotary element 80 ) to the front side. The cam 94 slides. In this way, the rotating element 80 rotates in the direction of the arrow.

FIG. 8( c ) is a state in which the operator further presses the operation portion 33 of the operation body 30 forward from the state in FIG. 8( b ). As shown in Figure 8(c), when the rotating element 80 rotates, the plane extending in the direction of the axis A, that is, the sliding surface 86 of the cam member 83 (rotating element 80), will abut against the plane extending in the direction of the axis A. It is the stepped surface 97 of the pressing body 90 . In this way, the rotating element 80 stops rotating. Here, since the position of the rotating element 80 in the direction of the axis A is fixed, and the pressing cam 94 of the pressing body 90 abuts against the pressing abutment cam 85 of the cam member 83 (rotating element 80 ), therefore, The pressing body 90 cannot move further forward. Therefore, the operation portion 33 of the operation body 30 cannot move further to the front side. Thus, the operator can feel that the pressing body 90 has reached the longest pressing depth. At this time, it is the state of complete touch and pressure.

FIG. 8( d ) shows the state immediately after the operator releases pressing the operation portion 33 of the operation body 30 after reaching the longest pressing depth. When the operator releases the operation portion 33 of the operating body 30, the rear spring 60 immediately pushes the pressing flange portion 96 of the pressing body 90 backward, so that the pressing body 90 moves rearward. Because the writing body 20 is also bounced and pushed to the rear side by the front spring 40, it moves to the rear side. Because it is pushed by the writing body 20, the pushing element 70 also moves to the rear side. If the pushing element 70 moves to the rear, the inclined surface located on the rear side of the pushing element 70 is the pushing element cam 75, and it will abut against the inclined surface located on the front side of the cam member 83 of the rotating element 80, that is, pushing. The element abuts the cam 84 . In this state, the urging member cam 75 of the urging member 70 presses the urging member of the cam member 83 (rotation member 80) against the cam 84 to the rear side, therefore, the cam member 83 (rotation member 80) When the pushing element abuts against the cam 84, it will slide along the pushing element cam 75 of the pushing element 70, and the rotating element 80 will rotate towards the direction of the arrow.

Fig. 8(e) shows that: the rotating element 80 rotates, and the plane extending in the direction of the axis A, that is, the sliding surface 86 of the cam member 83 (rotating element 80) abuts against the plane extending in the direction of the axis A, that is, pushing The element 70 pushes against the sides of the element groove 76, so that the rotating element 80 stops rotating. In this state, the writing body 20 is moved further to the rear side by the front spring 40, therefore, the cam member 83 (rotation element 80) is relatively pushed from the urging element of the urging element 70 in the axis A direction. The rear side of the groove 76 moves to the front side and returns to the state shown in FIG. 7( a ). At this time, the front end of the writing body 20 is in a state of retracting from the front end of the shaft cylinder into the shaft cylinder.

It can be seen from the above description that the rotating element 80 is only in the state where the direction of rotation is not being pushed, the pushing element abutting cam 84 abuts against the pushing element cam 75 and the pushing element cam 75 moves from the direction of the axis A. When the front side of the body is pressed to the rear side, and when the contact pressure cam 85 is in contact with the contact pressure cam 94 and the contact body 90 is pressed from the rear side to the front side in the direction of the axis A, the cams will be engaged with each other. And rotate. For example, unlike the first embodiment, if the rotating element 80 is constantly pushed in the rotating direction, the pressing sound when the rotating element 80 contacts other members becomes louder. However, in this embodiment, the rotating element 80 is not pushed in the direction of rotation, and only rotates when the cams are engaged with each other, so the impact when it abuts against other components is very small, and the contact can be reduced. Press the sound. Furthermore, because the rotating element 80 is in the state of not being pushed in the direction of rotation, when the operator performs a touch operation, the resistance of the sliding surface 86 of the rotating element 80 when moving in the pushing element groove 76 , compared with the state in which the rotating element 80 is constantly pushed in the rotating direction, the resistance is relatively small. In this way, the touch operation can be performed smoothly.

(the effect obtained by the position of the pen clip rotating shaft 38) When performing a touch operation on the operation body 30 , as shown in FIG. 5 , a pressing force F is applied to the operation portion 33 in the direction of the axis A. As shown in FIG. Here, for example, an example in which the clip rotation axis of the operating body 30 is positioned at the center of the clip movable regulating portion 39 of the first embodiment is taken as a comparative example. At this time, the pressing force F can be decomposed into: the force in the direction of the movable regulating portion 39 of the clip, and the radial force centered on the movable regulating portion 39 shown by Y1 in FIG. 5 . In the comparative example, the radial force Y1 is the force in the opening direction to lift the clip portion 36 upward from the barrel 10 . Therefore, in this comparative example, when the operator touches and presses the operation portion 33 , the pen grip portion 36 also opens upward from the barrel 10 . In this way, not only the operability is poor, but also the operation is unstable, and it also has a bad influence on the operation feeling (tactile pressure feeling).

However, in the first embodiment, the clip rotation shaft 38 is provided at the opposite end of the clip portion 36 with the axis A interposed therebetween. According to the first embodiment, when the operator performs a touch operation on the operating body 30, the pressing force F for pressing the operating portion 33 in the direction of the axis A can be decomposed into: a force in the direction of the clip rotation shaft 38, and The force in the radial direction centered on the clip rotating shaft 38 indicated by Y2 in FIG. 5 . In the present embodiment, the radial force Y2 is a force in a direction in which the clip portion 36 approaches the barrel 10 . Therefore, according to the first embodiment, when the operator performs a pressing action, the pen holder 36 does not open upward from the barrel 10 . Therefore, not only the operability is good, but also the operation is stable, and the operation feeling (tactile pressure feeling) is not affected.

In addition, since the operation part 33 extends to the axis A, when the operation part 33 is pressed, the pressing force can be sufficiently transmitted.

In addition, according to the operation body 30 of the first embodiment, not only when the operation portion 33 at the rear end is touched, but also when the pen holder 36 is moved to the front side, the touch operation can be performed.

The above has described the first embodiment of the present invention, however, the present invention is not limited to this embodiment, and various changes are possible. For example, although the connecting portion 35 and the clip portion 36 of the operating body 30 in the first embodiment are extended in a straight line parallel to the outer surface of the barrel 10, they are not limited to this shape, and may be curved. . Moreover, although the shape of the operation part 33 is a truncated cone shape, it may be another shape, such as a cylindrical shape.

Also, the front shaft tube 11 and the rear shaft tube 12 may be integrally formed. In addition, it is also possible that the rear spring 60 is not provided, and the operation part 33 as a whole is not separated from the rear end of the shaft cylinder 10 in the writing state of the non-contact pressure, and only in the non-writing state of the non-contact pressure, the operation part 33 33 is kept separate from the rear end of the shaft tube 10, so that the operating part 33 is floating in the air.

(second embodiment) Hereinafter, a writing instrument according to a second embodiment of the present invention will be described. In the second embodiment, a mechanical pencil 200 will be described as an example of a writing implement. FIG. 11 is a cross-sectional view of the mechanical pencil 200, and FIG. 12 is an enlarged view of the front portion of FIG. 11 .

The mechanical pencil 200 is provided with: a shaft barrel 210, an inner tube 50 accommodated inside the shaft barrel 210, a lead groove 250 disposed inside the inner barrel 50, and a writing body accommodated inside the lead groove 250. That is the refill 220. In addition, the mechanical pencil 200 is provided with: the front end operation mechanism 300 which can protrude the front end of the refill 220 from the front end of the barrel 210; The operating body 30 , the clip spring 110 for springing and pushing the operating body 30 , and the tail plug 120 arranged at the rear end of the front end operating mechanism 300 .

In the second embodiment, the operation body 30 , the inner cylinder 50 , the rear spring 60 , the pen clip spring 110 , and the tail plug 120 are the same as those in the first embodiment. In the following description, the same parts as those of the first embodiment are given the same reference numerals, and their descriptions are omitted.

(contact pressure body 290) In the pressure-contact body 290 of the second embodiment, the pressure-contact cam 94 is not provided on the front surface of the front wall 91b, but the pressure-contact cylinder 294 extends out. The contacting body 290 is similar to the contacting body 90 of the first embodiment, and is pushed backward by the rear spring 60, and its rearward movement is restricted by the rear shaft tube step 15 inside the rear shaft tube 12. .

(shaft barrel 210) The barrel 210 of the second embodiment includes a front barrel 211 , a rear barrel 12 , and a nib member 280 disposed inside the front barrel 211 . On the inner periphery of the front shaft cylinder 211, in addition to the first female thread portion 11b, a second female thread is provided at a portion where the inner diameter becomes smaller on the front side compared with the portion where the first female thread portion 11b is provided. Section 211c.

(nib member 280) The nozzle member 280 is a cylindrical member having a through hole 281 whose inner diameter becomes smaller as it approaches the front end, and its outer periphery has a substantially truncated conical shape with a smaller outer diameter as it approaches the front end. With the operator's touch operation, the writing body, that is, the front end of the pen core 220 will protrude from the front end of the through hole 281 . A threaded portion 282 is provided on the inner surface of the rear end of the through hole 281 of the nib member 280 . The threaded portion 282 is screwed with the first male threaded portion 271a of the small outer diameter portion 271 of the connector 270 described later.

(Front end operating mechanism 300) In the second embodiment, the front end operation mechanism 300 is a mechanism capable of protruding the front end of the writing body, that is, the tip of the refill 220 from the front end of the nib member 280 of the barrel 210 . The front-end operating mechanism 300 is provided with: a refill tank 250 for accommodating the refill 220 inside; and an eraser fixing groove 251 disposed behind the refill tank 250 ;

(refill slot 250) The refill tank 250 is arranged inside the inner tube 50 . The refill slot 250 is cylindrical and can accommodate a plurality of refills 220 inside.

(Eraser fixing groove 251) The eraser fixing groove 251 has a small outer diameter portion 251a on the front side and a large outer diameter portion 251b on the rear side. The small outer diameter portion 251 a is inserted into the rear end of the lead groove 250 . The inside of the large outer diameter portion 251b is for inserting the eraser 252 . When the operator performs a pressing operation, the rear end surface of the large outer diameter portion 251 b is pressed against the pressing cylinder 294 .

In addition, the front-end operating mechanism 300 also includes: a connecting tube member 260 that is pressed into the inside of the front end of the refill groove 250, a connector 270 that is disposed on the outer periphery of the connecting tube member 260, and a front end of the connecting tube member 260 that is fitted outside the connecting tube member 260. Spring 240.

(connection cylinder member 260) The connecting cylinder member 260 has, in order from the front side, a small outer diameter portion 261 , a flange portion 262 , and a large outer diameter portion 263 . On the inner front side of the connection cylinder member 260, the rear end of the chuck 230 which will be described later is held and fixed.

(connector 270) The connector 270 has a small outer diameter portion 271 , a middle outer diameter portion 272 , and a large outer diameter portion 273 in order from the front side. A first male thread portion 271 a is formed on the outer periphery of the small outer diameter portion 271 , and a second male thread portion 272 a is formed on the outer periphery of the middle outer diameter portion 272 . The connector 270 is fixed to the front shaft tube 211 by screwing the second male thread part 272a and the second female screw part 211c of the front shaft tube 211 together. The male screw part 51 of the inner tube 50 integrally formed with the rear shaft tube 12 is detachably screwed together with the first female screw part 11 b of the front shaft tube 211 . By dismantling the front barrel 211, the part containing the refill slot 250 contained in the barrel 210 can be taken out. Inside the connector 270, there are provided in order from the front side: a first inner diameter portion 274, a second inner diameter portion 275, a third inner diameter portion 276, a fourth inner diameter portion 277, and a fifth inner diameter portion. 278. The inner diameter of the first inner diameter portion 274 is larger than that of the second inner diameter portion 275 . And the inner diameter becomes larger sequentially in the order of the second inner diameter portion 275 , the third inner diameter portion 276 , the fourth inner diameter portion 277 , and the fifth inner diameter portion 278 . In the second embodiment, the inner diameter of the first inner diameter portion 274 is larger than the inner diameter of the third inner diameter portion 276 but smaller than the inner diameter of the fourth inner diameter portion 277 .

(front spring 240) The front spring 240 is fitted on the small outer diameter portion 261 of the connecting cylinder member 260, and is held on: the wall portion interposed between the fifth inner diameter portion 278 and the fourth inner diameter portion 277 of the connector 270, and the connection between the front surfaces of the flange portion 262 of the cylindrical member 260 . Utilize the front spring 240 to push the front surface of the flange part 262 of the connecting cylinder member 260 to the rear side, to push the chuck 230, the chuck ring 235, the connecting cylinder member 260, the pen core groove 250 and the eraser fixing groove 251 to the rear side. Push back. The connecting cylinder member 260 connects the chuck 230 , the refill slot 250 , and the eraser fixing slot 251 into one body.

The front end operation mechanism 300 further includes a backstop member 285 , a collet ring 235 , and a collet 230 .

(Chuck 230) The chuck 230 is held inside the connector 270 , and the rear end is inserted into the barrel member held at the front side of the cartridge groove 250 . On the front end side of the chuck 230, a large-diameter portion 231 whose outer diameter gradually increases is provided, and a plurality of slits (not shown) extending parallel to the axis A are formed in the large-diameter portion 231 and divided in the circumferential direction. The plural part (in the first embodiment, it is divided into thirds).

(collet ring 235) The collet ring 235 is a cylindrical member whose inner diameter gradually increases on the front end side. The chuck ring 235 is a member for opening and closing the chuck 230 . When the contact pressure operation is not performed, the collet ring 235 covers the outer circumference of the large diameter portion 231 of the collet 230 protruding from the front end of the connector 270, and is located at the first inner diameter portion 274 of the connector 270, so as to The clip 230 is restricted from moving backward relative to the connector 270 . The outer surface on the rear side of the chuck 230 is fitted to the inner surface on the front side of the connection cylinder member 260 . The front spring 240 springs and pushes the connecting cylinder member 260 backward relative to the connector 270 , so that the large-diameter portion 231 of the collet 230 is held in the collet ring 235 . When the outer periphery of the large-diameter portion 231 is held in the chuck ring 235 , the inner diameter of the large-diameter portion 231 of the chuck 230 is reduced to a closed state. In this way, the cartridge 230 is in a state capable of holding the refill 220 inside. If the large-diameter portion 231 moves to the more front side than the collet rings 235, it will break away from the state held by the collet ring 235, and the plurality of divided parts of the large-diameter portion 231 will be separated from each other, thereby expanding the inner diameter and becoming an open state. In this way, the refill 220 can move forward and backward.

(backstop member 285) The backstop member 285 is made of an elastic member such as rubber, is held inside the nib member 280, and has a through hole.

(when not touching) Similar to the first embodiment, even in the second embodiment, the front spring 240 and the rear spring 60 are used to push the pressure contact body 290 and the operation body 30 to the rear side during non-contact pressure, so that the entire The operation part 33 is kept apart from the rear end of the shaft barrel 210 . In this way, the operation part 33 is kept apart from the rear end of the shaft cylinder 210 when it is not pressed, and there is a gap between the operation part 33 and the shaft cylinder 210. Therefore, it is as if the operation part 33 is floating in the air. General excellent design. At this time, the front spring 240 is used to push the connecting cylinder member 260 backward so that the outer circumference of the large-diameter portion 231 of the collet 230 is held by the collet ring 235, so that the inner diameter of the large-diameter portion 231 of the collet 230 The diameter is reduced to the closed state. In this way, the cartridge 230 can hold the refill 220 inside.

(when pressed) Similar to the first embodiment, even in the second embodiment, the operation part 33 of the operation body 30 is moved to the front side, and a part of the operation part 33 is inserted into the rear end of the shaft cylinder 210 when the touch operation is performed. internal. At this time, the pressing body 290 is pressed forward by the pressing portion 31 . In this way, the refill groove 250 is pressed toward the front end side through the eraser fixing groove 251 . The flange portion 262 of the connection cylinder member 260 is also pressed toward the front end side. At this time, both the rear spring 60 and the front spring 240 are compressed. In this way, the chuck 230 held on the front end side of the connecting cylinder member 260 will keep the refill 220 to move toward the front end side, and the refill 220 moves toward the front end side through the inside of the back-stop member 285, and the pen refill 220 moves toward the front end side. The core 220 is also retained by the backstop member 285 . Although the collet ring 235 moves forward together with the collet 230, because it has a larger diameter than the collet 230, it will abut against the inner surface of the nib member 280 on the way, and be restricted from going further. Move forward. Thus, only the chuck 230 is left to move further to the front side. When the large-diameter portion 231 of the chuck 230 is moved further to the front side than the chuck rings 235, the plurality of divided parts are separated from each other, so that the inner diameter is enlarged to be in an open state.

(at the end of the touch) When the pressing action ends and the pressing of the pressing part 31 on the contacting body 290 is released, the front spring 240 and the rear spring 60 are used to push the contacting body 290 and the operating body 30 to the rear side again, so that the entire operating part 33 is kept apart from the rear end of the shaft tube 210, and there is a gap between the operation part 33 and the shaft tube 210, therefore, it is formed into a shape with excellent design as if the operation part 33 is floating in the air. At this time, the pressing of the lead tank 250 to the front end side and the pressing of the flange portion 262 of the connection tube member 260 to the front end side are released. In this way, the flange portion 262 of the connecting cylinder member 260 is elastically pushed by the spring force of the front spring 240 to move the connecting cylinder member 260 to the rear side. Although the chuck 230 after releasing the holding state of the refill 220 moves rearward together with the connecting cylinder member 260 , the refill 220 held by the backstop member 285 does not move rearward together. During the movement of the chuck 230 to the rear side, the outer periphery of the large-diameter portion 231 of the chuck 230 is held by the chuck ring 235 again. Therefore, the inner diameter of the large-diameter portion 231 of the collet 230 is reduced to a closed state. In this way, the refill 220 is held inside the chuck 230 . Therefore, the refill 220 does not retreat, so when the refill 220 protrudes from the front end of the nozzle member 280 by a predetermined length, writing can be performed.

As mentioned above, although various preferable embodiment of the writing instrument of this invention was demonstrated, this invention is not limited to the said embodiment, It is also possible to make an appropriate change. For example, in the first embodiment, the components of the front-end operating mechanism 100 include: the front spring 40, the inner cylinder 50, the pushing element 70, the pressing body 90, and the parts arranged between the pushing element 70 and the pressing body 90. The rotating element 80 and the rear spring 60 are used to press the pressing body 90 by the pressing portion 31 constituting the operating body 30 , but the structure is not limited to this. That is, a structure in which the pressing body and the pressing portion are integrated (in other words, a structure in which the pressing body is regarded as a part of the operation body) may be adopted. In this case, the pressing body constituting the operating body serves as a pressing portion that presses the distal end operating mechanism (urging member 70 ).

Also, in the second embodiment, although the members of the front-end operation mechanism 300 include: the pressing body 290, the eraser fixing groove 251 and the pen core groove 250, and the pressing part 31 constituting the operating body 30 is used to press the pressing body. 290 for pressing, but is not limited to this structure. That is, a structure in which the pressing body and the pressing portion are integrated (in other words, a structure in which the pressing body is regarded as a part of the operation body) may be adopted. In this case, the pressing body constituting the operating body serves as a pressing portion for pressing the tip operating mechanism (the eraser fixing groove 251 ).

A: axis B: Axis of rotation 1: ballpoint pen 10: Shaft barrel 11a: opening 11b: female thread part 12: Rear axle cylinder 13: sliding groove 14: Slit 20: Writing style 21:Ballpoint pen nib 22: Adapter 23: Ink storage tube 24: Spring bearing surface 30: Operating body 31: Pressing part 32: 1st wrist (joint part) 32a: spring pressing surface 33: Operation department 34: The second wrist (connection part) 35: Connecting part (connecting part) 36: Pen holder 37: protrusion 38: pen clip rotating shaft 39: Movable regulation part of pen holder 40: front spring 50: Inner cylinder 50a: protrusion 50B: rear of inner cylinder 50F: front of inner cylinder 50M: the middle of the inner cylinder 51: Male thread part 52: Step Department 54: Gap 55: Extension 56: Rear end protrusion 57: Outer circumference protrusion 58: Protrusion on inner circumference 60: rear spring 70: push element 71: pushing the element to press the face 72: sliding part 73: Cylindrical part 74: Forming the thickening part for the cam 75: push element cam 76: push component groove 77: step surface 80: rotating element 81: Large diameter part of rotating element 82:Small diameter part of rotating element 83: Cam member 84: Pushing element abuts against cam 85: Touch the abutment cam 86: sliding surface 90: contact pressure body 91: Storage room of pressing part 91a: side wall 91b: front wall 91c: engagement protrusion 91d: shaft retaining recess 91e: Movable recess 94:Touch pressure cam 95: Touch the sliding part 96: Touch the flange part 97: step surface 100: Front-end operating mechanism 110: pen clip spring 120: tail bolt 121: rear wall 122: snap wall 123:Pedestal 124: engaging hole 200: mechanical pencil 210: shaft barrel 211: front axle tube 220: refill (writing) 230: Chuck 235: collet ring 240: front spring 250: refill slot 251: Eraser fixing slot 252: Eraser 260: Connecting cylinder components 262: Flange 270: Connector 280: nib component 285: Backstop component 290: contact pressure body 300: front-end operating mechanism

[ Fig. 1 ] is a sectional view of a ballpoint pen 1 according to a first embodiment. [ FIG. 2 ] is an exploded perspective view of the ballpoint pen 1 . [ FIG. 3 ] is an enlarged exploded view of the operation body 30 and the front end operation mechanism 100 . [ FIG. 4 ] is an enlarged assembly view of the operation body 30 and the front end operation mechanism 100 . [ Fig. 5 ] is a cross-sectional view of the rear end of the ballpoint pen 1 in a non-writing state at the time of non-contact pressure. [ FIG. 6 ] is a cross-sectional view of the rear end of the ballpoint pen 1 , showing a state in which the front side of the pen holder 36 of the operating body 30 is lifted up from the barrel 10 . [ FIG. 7 ] is a diagram showing the operation of the distal end operating mechanism 100 . [ FIG. 8 ] is an operation diagram showing the operation of the distal end operation mechanism 100 . [ Fig. 9 ] is an internal view showing the rear end of the ballpoint pen 1 at the time of full touch pressure, and the barrel 10 is indicated by a dotted line. [ Fig. 10 ] is an internal view showing the rear end of the ballpoint pen 1 in the writing state at the time of non-contact pressure, and the barrel 10 is indicated by a dotted line. [ Fig. 11 ] is a cross-sectional view of a mechanical pencil 200 according to the second embodiment. [ Fig. 12 ] is an enlarged view of the front side of Fig. 11 .

1: ballpoint pen

10: Shaft barrel

11: Front axle tube

11a: opening

11b: female thread part

12: Rear axle cylinder

13: sliding groove

14: Slit

20: Writing style

21:Ballpoint pen nib

22: Adapter

23: Ink storage tube

24: Spring bearing surface

30: Operating body

31: Pressing part

32: 1st wrist (joint part)

33: Operation department

36: Pen holder

37: protrusion

40: front spring

50: Inner cylinder

50a: protrusion

50B: rear of inner cylinder

50F: front of inner cylinder

50M: the middle of the inner cylinder

51: Male thread part

52: Step Department

60: rear spring

70: push element

80: rotating element

90: contact pressure body

100: Front-end operating mechanism

110: pen clip spring

120: tail bolt

A: axis

Claims (7)

A writing instrument, which is a Knock-type writing instrument having a shaft housing a writing body therein, comprising: The front end of the aforementioned writing body can be protruded and retracted from the front end of the aforementioned shaft barrel, or at least the front end of the aforementioned writing body can be protruded from the front end of the aforementioned shaft barrel before the front-end operating mechanism, and An operating body capable of actuating the aforementioned front-end operating mechanism, The aforementioned operator has: Arranged on the axial rear side of the shaft cylinder, at least in a non-writing state when not pressed, is an operation part kept apart from the rear end of the shaft cylinder, and The pressing part is disposed inside the shaft cylinder, and when the operating part is pressed, it is a pressing part that presses the front end operating mechanism in conjunction with the operating part. The writing instrument according to claim 1, wherein the operation portion is arranged at a position passing through the axis. The writing instrument according to claim 1 or claim 2, wherein a part of the operation part enters the interior of the shaft barrel from the rear end of the shaft barrel when pressed. The writing instrument according to any one of Claims 1 to 3, wherein the operating body has a linking portion linking the pressing portion and the operating portion. The writing instrument according to claim 4, wherein the operating body has a pen clip portion extending continuously from the connecting portion toward the front side outside the barrel. The writing instrument according to claim 5, wherein the operating body is rotatable around a clip rotation shaft extending in a direction perpendicular to the axis, so that the front side of the clip part can be separated from the shaft cylinder. The writing instrument according to any one of claim 4 to claim 6, wherein the connecting portion is in the shape of a ㄇ.

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