JP5844933B1 - Writing instrument with eraser - Google Patents

Writing instrument with eraser Download PDF

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Publication number
JP5844933B1
JP5844933B1 JP2015096054A JP2015096054A JP5844933B1 JP 5844933 B1 JP5844933 B1 JP 5844933B1 JP 2015096054 A JP2015096054 A JP 2015096054A JP 2015096054 A JP2015096054 A JP 2015096054A JP 5844933 B1 JP5844933 B1 JP 5844933B1
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erasing
clip
movable
cam
writing instrument
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JP2016203596A (en
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阿部 猛
猛 阿部
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阿部 猛
猛 阿部
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K21/00Propelling pencils
    • B43K21/02Writing-core feeding mechanisms
    • B43K21/16Writing-core feeding mechanisms with stepwise feed of writing-cores
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K24/00Mechanisms for selecting, projecting, retracting or locking writing units
    • B43K24/02Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions
    • B43K24/04Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions operated by means sliding in longitudinally-slotted casings
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K25/00Attaching writing implements to wearing apparel or objects involving constructional changes of the implements
    • B43K25/02Clips
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B43WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
    • B43KIMPLEMENTS FOR WRITING OR DRAWING
    • B43K29/00Combinations of writing implements with other articles
    • B43K29/02Combinations of writing implements with other articles with rubbers

Abstract

PROBLEM TO BE SOLVED: To remove an eraser and a friction body to be erased by frictional heat as an erasing member for erasing a handwriting used in a conventional mechanical pen or a thermochromic ballpoint pen because the cap is lost, and is lost. There was a problem that paper was soiled when erasing due to dust particles. SOLUTION: A clip 2 is connected to a movable knock holder 9 in a shaft cylinder 1 so that these can be moved forward and backward, and a mechanism for separating or contacting a front portion 10 with a direction of a writing core 12 is configured. The erasing member 15 is attached to one of the rear portions 14 so that the erasing member 15 protrudes from the rear end hole 19 of the shaft tube 1 and can be accommodated in the shaft tube 1. [Selection] Figure 1

Description

  The present invention relates to an eraser for erasing a pencil lead for a mechanical pencil or a friction body for erasing a handwriting for a thermochromic writing instrument such as a ballpoint pen with frictional heat.
  Conventionally, as a feeding eraser used for mechanical pencils, a cylindrical body with a spiral is attached to the rear end of the shaft cylinder, a spiral is formed on the outer surface of the eraser inside the cylindrical body, and it is inserted by the screw principle. In some cases, the eraser was fed out by turning the knob. (For example, refer to Patent Document 1.)
In addition, there is a friction body used in a thermochromic writing instrument that is integrated with a clip, and there is a friction body that protrudes from a rear end portion of a shaft tube by a rear movable operation of the clip. (For example, see Patent Document 2)
Furthermore, as a friction body used in a thermochromic writing instrument, a friction body fixed and attached to the rear end of the shaft cylinder is a protective cylinder unit integrated with the clip. There was something covering the friction body. (For example, refer to Patent Document 3.)
Hereinafter, description will be given based on the above-mentioned patent document.
Description will be made based on the drawings 1 and 3 described in Patent Document 1. In FIG. 1, the mechanical pencil main body head in which the spiral 2 is formed on the eraser and these erasers are shown in FIG. Further, a cylindrical body subjected to spiral processing is attached, and the eraser head is inserted into the cylindrical body so as to be fed out by rotating with a finger.
In addition, according to FIGS. 1 to 2 described in the above-mentioned Patent Document 2, the friction part 9 is formed by integrating the clip body 51 and the base part 54, the bent part 55, the attachment part 56, etc. The friction portion 9 protrudes from the rear end portion of the shaft tube 2.
Further, in FIG. 4 described in Patent Document 3, the friction body 4 is attached to the rear end portion of the shaft tube 2 and the cylindrical protective tube portion 6 is integrated with the clip main body 51 to move backward when not in use. The outer periphery of the friction body 4 is surrounded.
  Published Utility Heisei 3-106092   JP2012-218389A   JP 2014-128912 A
  The eraser member for the conventional mechanical pencil eraser described in Patent Document 1 has a cylindrical body fixed to the end of the mechanical pencil body head, and the eraser body is inserted. Since it is always exposed, there is a problem in that dust scraps adhere and the paper surface becomes dirty and cannot be stored.
Further, the thermochromic writing instrument 1 of the above-mentioned Patent Document 2 has the friction portion 9 exposed at any time when the clip body 51 is moved back and forth. There is also a problem that the friction portion 9 cannot be stored in the shaft tube.
In addition, the erasing member of the friction body 4 of the thermochromic writing instrument 1 of the above-mentioned Patent Document 3 is attached by attaching the friction body 4 to the rear end portion of the shaft cylinder, and dust dust or the like adheres to the friction body 4. Since it is surrounded by a cylindrical protective cylinder 6 so as not to become dirty, and these cylindrical protective cylinders 6 are exposed and covered from the outer peripheral surface of the shaft cylinder 2 when moving back and forth, it looks bad and inconvenient. there were.
Furthermore, since the clip main body 51 and the cylindrical protective cylinder portion 6 are integrated, there are problems such as assembling and cost due to complexity in manufacturing.
  Since the movable clip body 51 and the writing body 3 are always connected, there is a problem that these structures cannot be applied to a mechanical pencil. There was a problem that the feeding mechanism could not be.
  The present invention is intended to solve the problem of such a conventional configuration, and is a writing instrument with an erasing member that can be applied regardless of any writing instrument such as a mechanical pencil or a thermochromic writing instrument. The purpose is to realize the provision.
  The writing core 12 shown below corresponds to a core case that houses a pencil core 28 for a mechanical pencil, a refill that contains a thermochromic ink for a thermochromic writing instrument, and the like.
  In addition, “front” shown below refers to the direction of the pen tip outlet 35 of the shaft cylinder 1, and conversely, “rear” refers to the direction of the rear end hole 19 that is the protruding port of the erasing member 15. .
  In each writing instrument, the clip 2 or the pressing lever 5 is connected to the movable knock holder 9 in the shaft cylinder 1 via the lever support 6 portion, and the mechanical pencil eraser or thermochromic property is attached to the rear portion 14 of the movable knock holder 9. From the rear end hole 19 of the shaft tube 1 that is used as a protruding port of the erasing member 15 by attaching the erasing member 15 of the writing instrument friction member and moving the clip 2 or the pressing lever 5 to the rear of the shaft tube 1. The erasing member 15 is projected and removed, and the erasing member 15 can be accommodated in the shaft tube 1.
  Then, an eraser erasing member 15 attached to the rear part 14 of the movable knock holder 9 for the mechanical pencil is formed from the rear part 14 to adjust the expansion and contraction due to wear during use. The erasing member 15 is projected and removed from the rear end hole 19.
  In order to perform the feeding mechanism using the eraser, the movable knock holder 9 is formed in a cylindrical shape, a spiral 25 is provided in the cylindrical body, and the spiral 25 is also provided on the outer surface of the long eraser body. An extension / retraction adjustment mechanism is configured by providing and engaging the spirals 25 with each other.
In addition, the penetrating hole 27 is formed through the eraser member 15 for the eraser, and the pencil lead 28 is inserted through the penetrating hole 27 so that it can be instantly stored in the pencil lead case in the shaft tube 1.
A passage blocking valve 29 for preventing the pencil lead 28 from returning backward is provided on the front end surface of the eraser.
  The above-mentioned eraser feeding mechanism and the method for inserting the pencil lead from the through hole of the eraser and the passage blocking valve have been filed by the same applicant as the applicant of the present application. No. 142710.
  Further, the front portion 10 of the movable knock holder 9 is configured to be separated from or in contact with the direction of the movable pressing member 13 and the writing core 12, and the pen tip 34 or the erasing is performed by moving the clip 2 or the pressing lever 5 back and forth. Any member 15 can be inserted and removed freely.
  Further, in the thermochromic writing instrument, the erasing member 15 used as a friction body that can be mounted on the outer peripheral surface of the shaft tube 1 is formed in a long cylindrical cover shape, and the erasing member 15 in the long cylindrical cover shape is lifted by the clip 2 and the lifting member. In order to cover the outer peripheral surface 32 of the shaft cylinder excluding the portion 4 and make it easy to slide backward, the clip 2 or the pressing lever 5 is moved to the rear of the shaft cylinder 1 with play. Continuing with the movable operation, the long cylindrical cover-shaped erasing member 15 is projected from the rear end surface of the shaft tube 1 to be taken in and out.
  When the above-described long cylindrical cover-like erasing member 15 is attached to the clip 2 portion, it is a portion that hits the base of the hand when the shaft cylinder 1 is gripped, and can be used as a protective material for the base of the hand and to prevent slipping. It is. There is an application related to these which is filed by the same applicant as the applicant of the present application, and the application number is shown in Japanese Patent Application No. 2015-41764.
  Note that the handwriting erasing member 15 by the friction body for the thermochromic writing instrument does not wear due to the difference in material from the eraser, so that the structure of the feeding mechanism is not particularly required.
  In addition, the clip 2 or the pressing lever 5 is movably moved to the rear of the shaft tube 1 to prevent the clip 2 or the pressing lever 5 from moving forward when the erasing member 15 protrudes from the rear end surface of the shaft tube 1. The stopper locking groove 22 mechanism is configured so that it can withstand the pressure friction generated during use of eraser or eraser as the erasing member 15 and handwriting erasing. Therefore, when the solution of the present invention described above is used, it can be applied to either a mechanical pencil or a thermochromic writing instrument. In recent years, there are gel ink ballpoint pens and the like that can be erased even with an eraser.
  As described above, the writing instrument with an erasing member of the present invention is very convenient because it can be used in any writing instrument such as a mechanical pencil or a ballpoint pen.
  The eraser with an eraser or friction body attached to the movable knock holder in the shaft cylinder can be easily erased by protruding from the rear end hole of the shaft cylinder and stored in the shaft cylinder when necessary. In addition, since it is effective in preventing dust and the like from being adhered, the paper is not soiled at the time of erasing the handwriting.
  Since the eraser body erasing member attached to the movable knock holder can be extended and retracted by the feeding mechanism, it is convenient to adjust the protrusion from the rear end hole of the shaft tube.
  By forming a through-hole in the erasing member fitted with an eraser, it is not necessary to remove a cap or the like as in the prior art, and the pencil lead can be instantaneously inserted into the lead case, and the passage prevention valve It can prevent reversion.
  Since the front part of the movable knock holder constitutes a mechanism that is separated from or in contact with the direction of the movable pressing member and the writing core, the writing core and the erasing member can both be put in and out by a movable operation before and after the clip.
  Since the erasing member formed in the shape of a long cylindrical cover can be moved together with the posterior movable operation of the clip or the pressing lever, the erasing member can be moved at the same time, and can be protruded from the rear end surface of the shaft cylinder. The handwriting can be easily erased, and can be used to protect the base of the hand and to prevent slipping during writing by being attached to the outer peripheral surface of the shaft cylinder.
  In addition, a stopper locking groove is provided to prevent the clip or pressing lever from moving forward due to the pressure generated when the erasing member protrudes when the clip or pressing lever moves backward, and when the erasing member erases the handwriting. can do.
  The fragmentary sectional view of the side surface shown by the broken line by 1st embodiment of this invention   Side surface sectional drawing which shows the use condition by making the erasing member of FIG. 1 protrude   The fragmentary sectional view of the side surface shown by the broken line by 2nd embodiment of this invention   The fragmentary sectional view of the side surface shown by the broken line by 3rd embodiment of this invention
  Hereinafter, embodiments of the present invention will be described with reference to FIGS.
  FIG. 1 is a side cross-sectional view showing a state in which a friction body erasing member 15 used in the thermochromic writing instrument according to the first embodiment is housed. A step portion 3 is provided on the clip 2 behind the shaft tube 1, a lifting portion 4 is formed on the front side, and a pressing lever 5 is formed on the rear side.
The clip 2 and the pressing lever 5 are fitted to the support shaft 7, the spring 8 is mounted, and the lever 2 is connected to the lever support 6.
The lever support 6 is connected to the movable knock holder 9 in the shaft cylinder 1 and is provided with cam teeth 11 at the front portion 10 of the movable knock holder 9, and an erasing member 15 is attached to one rear portion 14 so as to be thermally discolored. A friction body for erasing handwriting of water-based ink.
The clip 2 and the pressing lever 5 connected to the movable knock holder 9 can be moved forward and backward by a front slide groove 16 and a rear slide groove 17 provided in the shaft cylinder 1. The unit 10 is in contact with the movable pressing member 13 connected to the writing core 12 and can be separated.
The writing core 12 can be separated from the movable pressing member 13 at the time of replacement, and is always connected by pressing the movable pressing member 13 by a spring 21.
The erasing member 15 attached to one of the rear portions 14 is projected and removed from the rear end hole 19 of the detachable cap 18 attached to the rear of the shaft tube 1 and can be stored in the shaft tube 1. The attaching / detaching cap 18 may be attached by any one of a locking one-touch type, a spiral type, and a penetrating attachment type.
The above-described detachable cap 18 is not necessarily required, and may be the same as the rear end hole 19 of FIG. 4 shown below in which a hole is provided directly on the rear end surface of the shaft cylinder, and is optionally used depending on the application. This is useful.
Then, the forward portion 10 of the movable knock holder 9 comes into contact with the movable pressing member 13 by the forward moving operation of the clip 2 or the pressing lever 5, and the pen tip 34 can be inserted and removed from the pen tip outlet 35 together with the writing core 12 by the pressing. become.
A cam portion 20 is formed in the shaft cylinder 1, and the movable pressing member 13 connected to the writing core 12 engages with the cam portion 20 while rotating to adjust the front and rear, and a spring in the shaft cylinder 1. 21 is repeatedly movable so that it can be taken in and out.
The writing core 12 (or refill) contains thermochromic ink.
Even if the portion where the cam teeth 11 are formed on the front portion 10 described above is separated from the connecting portion 36, the pen tip 34 can be put in and out of contact with the movable member 13.
As described above, the cam portion 20 serving as the cam groove is formed in the shaft cylinder 1, and the movable pressing member 13 serving as the rotating cam in the front and the cam teeth 11 serving as the fixed cam in the rear are formed on the cam portion 20. The pen tip 34 for the ballpoint pen that constitutes a slidable cam mechanism is engaged in and out of engagement with each other.
In the known cam mechanism, a movable pressing member 13 that is a rotating cam and a cam tooth 11 that is a fixed cam for pressing the movable pressing member 13 are engaged with the cam portion 20 and are always in close contact and are slid. Conventionally, there is no main invention in which these (including the movable knock holder 9) are separated from each other.
In the present invention, the cam teeth 11 or the movable knock holder 9 is separated from the movable pressing member 13 constituting the cam mechanism, so that the erasing member 15 is simultaneously projected from the rear end hole 19 and the clip 2 is moved forward. Thus, the cam mechanism can be restored again, and the cam mechanism can be demonstrated.
FIG. 2 is a side sectional view showing a protruding state (erased handwriting) of the erasing member 15 according to FIG.
By pressing the step 3 of the clip 2 rearward, the lever support 6 slides in the rear slide groove 17, and the erasing member 15 protrudes from the rear end hole 19 to rub the handwriting of the thermochromic ink. Erase with frictional heat.
  Since the front portion 10 of one movable knock holder 9 is configured to be separated from the writing core 12 and the movable pressing member 13, either the writing core 12 or the erasing member 15 can be moved by moving the clip 2 back and forth. Both can be done in and out.
In addition, during handwriting erasure due to friction of the erasing member 15, the convex ball portion 23 is engaged and locked to the stopper locking groove portion 22 for preventing the clip 2 from returning to the front by the pressure of pressing friction, Due to the pressing of the pressing lever 5, the convex ball portion 23 is separated from the locking groove portion 22 and detached.
When the clip 2 moves rearward, the convex ball portion 23 is lifted from the ball portion slide groove 37 and engaged with the locking groove portion 22 to be fixed.
FIG. 3 is a side sectional view showing a state in which the eraser erasing member 15 used in the mechanical pencil according to the second embodiment is housed.
A lifting portion 4 and a U-shaped step portion 3 are formed on the clip 2, and the lever support 6 is connected to the movable knock holder 9, and the U-shaped step portion 3 is pressed backward with a finger to facilitate movement.
The movable knock holder 9 can be moved back and forth by the front slide groove 16 and the rear slide groove 17.
The pencil lead 28 can be inserted and removed by pressing the pressing lever 5 forward so that the convex ball portion 23 slides the ball portion slide groove 37 and the pen tip 34 can be inserted and removed from the pen tip outlet 35.
In order to perform the feeding method by attaching an eraser as the erasing member 15 to the rear portion 14, the movable knock holder 9 is formed in a cylindrical shape and a spiral 25 is formed therein.
  A spiral 25 is also formed on the outer surface of the eraser and inserted from the rear portion 14 while being engaged with the spirals 25 inside the movable knock holder 9, and the rear end portion of the erasing member 15 is picked and rotated to extend and retract. Adjustment is performed, and a suitable amount of length is projected from the rear end hole 19 of the detachable cap 18, and the detachable cap 18 is removed every time wear is performed.
  In addition to the above-described method for feeding out the eraser by the spiral, the method for feeding out the eraser according to Japanese Patent Application Laid-Open No. 2004-301207, Japanese Patent Application Laid-Open No. 2005-161643, Japanese Utility Model Laid-Open No. 56-149691 It can be considered in a wide variety, and any of them can be used.
  One of the front portions 10 is formed in a long cylindrical shape, and the writing core 12 is allowed to have a play and is inserted into the loose fit. The lead 28 is supported and is repeatedly moved by the spring 21 so that the writing lead 12 can be taken in and out, and the clip 2 is separated from the writing lead 12 when moving backward.
The long cylindrical front part 10 in which the writing core 12 is inserted is inserted into the loose fit with play so as to be movable back and forth, and the writing core 12 is formed in a piston shape so that the writing core 12 is not detached. Allow separation.
As described above, the clip 2 is connected to the movable knock holder 9 in the shaft cylinder 1 via the lever support 6 portion, and the pencil lead 28 for the mechanical pencil can be taken in and out by the forward movable operation of the clip 2. To.
The rear end of the writing core 12 is freely engaged and connected to the front portion 10 of the movable knock holder 9, and an erasing member 15 is mounted in one of the movable knock holders 9 to extend and contract by a feeding mechanism. It is configured so that adjustment can be performed, and the clip 2 is moved to the rear of the barrel 1 and at the same time, the front portion 10 of the movable knock holder 9 is separated from the writing core 12 so as to be freely fitable, The erasing member 15 is configured to protrude from the rear end hole 19 of the shaft tube 1.
Since a mechanism for feeding out the long erasing member 15 is configured from within the movable knock holder 9, it can be fed many times for each wear, and at the same time, the clip 2 is moved backward to project from the rear end hole 19. The effect is said.
A through-hole 27 penetrating in the front-rear direction is formed inside the eraser as the erasing member 15, and a pencil lead 28 is instantaneously inserted into the writing lead 12 (or lead case) from the rear end surface of the through-hole 27. .
The inserted pencil lead 28 is provided with a passage blocking valve 29 for preventing the return from the through hole 27.
To move the clip 2 backward, the eraser erasing member 15 protrudes from the rear end hole 19, and at the same time, the convex ball portion 23 engages and is locked with the locking groove portion 22. By lifting the lifting portion 4 of the clip 2 upward, the convex ball portion 23 is separated from the locking groove portion 22 and detached.
  FIG. 4 is a side sectional view showing a state where the erasing member 15 used in the thermochromic writing instrument according to the third embodiment is mounted on the outer peripheral surface 32 of the shaft cylinder.
  A long cylindrical concave shaft cylinder 30 having a step is formed on the rear side of the shaft cylinder 1, and an erasing member 15 for handwriting erasing friction of thermochromic ink is formed on the outer peripheral surface of the long cylindrical concave shaft cylinder 30. Put it on. The erasing member 15 is formed in the shape of a long cylindrical cover, and is inserted and mounted in a loose fit with play in the concave cylinder 30.
  A lifting part 4 and a step part 3 of the clip 2 and a pressing lever 5 are provided on the concave cylinder 30 and are fitted to the lever support 6 by a support shaft 7 of the lever support 6 and can be repeated up and down via a spring 8. Attach to.
  The clip 2 and the lever support 6 are formed so as to be slidable so as to prevent the lever support 6 from being detached from the concave shaft tube 30 by forming a rear slide groove 17 so that the concave shaft tube 30 can be moved backward. ing.
The erasing member 15 mounted on the concave barrel 30 can be integrated with the clip 2 and can be projected from the rear end surface of the barrel 1 in conjunction with the front and rear movable operations. Since the member 15 covers the knock portion 31, there is no hindrance to friction elimination.
In addition, it is possible to manually move only the erasing member 15 having a long cylindrical cover shape, and the clip in that case does not have to be fixed and movable.
  The writing core 12 and the pen tip 34 are put in and out of the cam of the movable pressing member 13 with the cam in which the cam teeth 11 of the knocking portion 31 rotate by the pressing operation of the pressing type knocking portion 31 provided at the rear of the shaft tube 1. Engage and adjust the entry / exit by the cam portion 20 in the shaft cylinder 1, and remove the writing core 12 and the pen tip 34 from the pen tip outlet 35.
  The erasing member 15 when projecting from the rear end surface of the shaft tube 1 has a protruding lever portion 23 locked to the stopper locking groove portion 22 so that the clip 2 is not returned to the front due to erasing friction. 5 may be pressed.
Although the clip 2 is connected to the movable knock holder 9 via the lever support 6 according to FIGS. 1 to 4 described above, as an alternative method, the clip 2 is removed and only the lever support 6 is attached to the outer periphery of the shaft cylinder. It may be exposed from the surface 32 and used as an operation knob, and that portion may be used for a movable movement operation in front and rear instead of the clip 2.
When the clip is necessary, the clip may be separated from the operation knob and attached to the outer peripheral surface 32 of the shaft cylinder.
  In addition to the single type of pen-shaped writing tool as described above, it can be used for a multi-core writing tool or a double writing tool. In the case of using as a multiple writing instrument with a plurality of multi-cores in that case, a multi-structure writing instrument with a multi-core structure may be formed below the front portion 10 of the movable knock holder 9.
In addition, at the time of the ballpoint pen according to FIGS. 1 to 2 and 4 described above, the knock mechanism such as the cam teeth 11 and the cam portion 20 has a large number of parts. If the clip 2 is moved forward and locked by separately providing the locking groove portion 22 of the portion 23 on the front shaft cylinder surface of the lifting portion 4, the pen tip 34 of the connected writing core 12 protrudes. You can write by doing. In combination with the clip 2 for a writing instrument with an erasing member of the present invention, a writing instrument with a new writing core 12 connected can be made. In order to do so, a pen tip insertion / removal mechanism that connects the writing body 8 according to Japanese Patent Laid-Open No. 2012-218389 of Patent Document 2 described above to the clip main body 51 may be configured.
  According to each of the above-described embodiments, the writing tool and the erasing member 15 can be used for any writing tool depending on the usage of the writing tool and the erasing member 15, so that it is convenient and effective.
DESCRIPTION OF SYMBOLS 1 Shaft cylinder 2 Clip 4 Lifting part 5 Pressing lever 6 Lever support 9 Movable knock holder 10 Front part 11 Cam tooth 12 Writing core 13 Movable pressing member 14 Back part 15 Erasing member 16 Front slide groove 17 Back slide groove 19 Back end hole 20 Cam part 22 Locking groove part 23 Convex ball part 25 Spiral 27 Through-hole 28 Pencil core 29 Passage prevention valve 30 Concave shaft 31 Knock part 32 Shaft cylinder outer peripheral surface 34 Pen tip 37 Ball part slide groove

Claims (4)

  1. A cam mechanism in which a cam portion serving as a cam groove is formed in the shaft cylinder, and a movable pressing member serving as a rotating cam in the front and a cam tooth serving as a fixed cam in the rear are engaged with the cam portion and can slide. In the writing instrument for inserting and removing the pen tip , the clip and the pressing lever are connected to the movable knock holder in the shaft cylinder through the lever support portion, and an erasing member is attached to the rear portion of the movable knock holder, simultaneously performing moving operation of the clip to the barrel rearward from the movable pressing member, thereby separating the said cam teeth or movable knock holder, the rear end hole of the barrel, so that is projected to the erasing member erasing member with a writing instrument for a ballpoint pen that is configured.
  2. In the writing instrument that is connected to the movable knock holder in the shaft cylinder via the lever support portion on the clip, and puts and removes the pencil lead by the forward movable operation of the clip, the erasing member is mounted in the movable knock holder, configure the telescopic adjustment of the delivery mechanism of the erasing member as rows of obtaining, by performing the moving operation of the clip to the barrel rearward, consists rear end hole of the shaft tube so as to project the erasing member Writing instrument with erasing member for mechanical pencils .
  3.   In the writing instrument, an erasing member that can be attached to the outer peripheral surface of the shaft tube is formed in a long tube cover shape, and the erasing member in the shape of the long tube cover is covered with the outer peripheral surface of the shaft tube except for the clip and the lifting portion. An erasing device configured to be fitted freely, and the clip is connected to the rear of the shaft tube simultaneously with the movable operation, and the erasing member in the shape of the long tube is projected from the rear end surface of the shaft tube to be taken in and out. Writing instrument with materials for use.
  4. A convex ball portion is provided on the back side of the lifting portion of the clip, a locking groove portion is provided on the outer peripheral surface of the shaft cylinder, and at the same time as the protrusion from the rear end hole of the erasing member during the rear movable operation of the clip, the convex ball portion 4. The writing instrument with an erasing member according to claim 1 , further comprising a stopper that engages with the locking groove to prevent the clip from moving forward . 5.
JP2015096054A 2015-04-16 2015-04-16 Writing instrument with eraser Active JP5844933B1 (en)

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JP2015096054A JP5844933B1 (en) 2015-04-16 2015-04-16 Writing instrument with eraser
PCT/JP2016/061466 WO2016167183A1 (en) 2015-04-16 2016-03-31 Writing implement with erasing member

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JP2016203596A JP2016203596A (en) 2016-12-08

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6307647B1 (en) * 2017-03-30 2018-04-04 株式会社たくみ Knock-type writing instrument
EP3613605A1 (en) 2018-08-22 2020-02-26 Société BIC Writing instrument comprising a rotary eraser
WO2021015062A1 (en) * 2019-07-25 2021-01-28 株式会社パイロットコーポレーション Retractable writing implement

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02292098A (en) * 1989-04-28 1990-12-03 Iwasaki Kinzoku Kogyo Kk Eraser and slider writing utensil
JP2014193571A (en) * 2013-03-29 2014-10-09 Pilot Corporation Thermochromic writing instrument
JP5698404B1 (en) * 2014-06-24 2015-04-08 阿部 猛 Mechanical pencil with eraser feeding device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02292098A (en) * 1989-04-28 1990-12-03 Iwasaki Kinzoku Kogyo Kk Eraser and slider writing utensil
JP2014193571A (en) * 2013-03-29 2014-10-09 Pilot Corporation Thermochromic writing instrument
JP5698404B1 (en) * 2014-06-24 2015-04-08 阿部 猛 Mechanical pencil with eraser feeding device

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JP2016203596A (en) 2016-12-08

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