WO2017104468A1 - ノック式筆記具 - Google Patents
ノック式筆記具 Download PDFInfo
- Publication number
- WO2017104468A1 WO2017104468A1 PCT/JP2016/086078 JP2016086078W WO2017104468A1 WO 2017104468 A1 WO2017104468 A1 WO 2017104468A1 JP 2016086078 W JP2016086078 W JP 2016086078W WO 2017104468 A1 WO2017104468 A1 WO 2017104468A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cam
- knock
- engaged
- writing instrument
- pen tip
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K24/00—Mechanisms for selecting, projecting, retracting or locking writing units
- B43K24/02—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions
- B43K24/08—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions operated by push-buttons
- B43K24/082—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions operated by push-buttons placed on the side
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K24/00—Mechanisms for selecting, projecting, retracting or locking writing units
- B43K24/02—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions
- B43K24/08—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions operated by push-buttons
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K24/00—Mechanisms for selecting, projecting, retracting or locking writing units
- B43K24/02—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions
- B43K24/08—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions operated by push-buttons
- B43K24/084—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions operated by push-buttons with saw-like or analogous cams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K24/00—Mechanisms for selecting, projecting, retracting or locking writing units
- B43K24/02—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions
- B43K24/08—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions operated by push-buttons
- B43K24/088—Mechanisms for selecting, projecting, retracting or locking writing units for locking a single writing unit in only fully projected or retracted positions operated by push-buttons with spreading spring means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K25/00—Attaching writing implements to wearing apparel or objects involving constructional changes of the implements
- B43K25/02—Clips
- B43K25/028—Clips combined with means for propelling, projecting or retracting the writing unit
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B43—WRITING OR DRAWING IMPLEMENTS; BUREAU ACCESSORIES
- B43K—IMPLEMENTS FOR WRITING OR DRAWING
- B43K7/00—Ball-point pens
- B43K7/12—Ball-point pens with retractable ball points
Definitions
- the present invention relates to a knock-type writing instrument. More specifically, the present invention relates to a knock type writing instrument provided with a retracting mechanism that allows a pen tip of a writing body to be protruded and retracted from a front end of a shaft cylinder by pressing a knock member having a clip forward.
- Patent Document 1 discloses a writing body slidably provided in a shaft cylinder, an operating means for sliding the writing body from the rear, and this operating means.
- the knock member is provided with a means for preventing rotation of the knock member on the outer wall of the tubular body of the knock member and the inner wall of the shaft cylinder.
- a detent structure for a knock member with a clip of a writing instrument is disclosed.
- Patent Document 1 discloses a structure in which the rotation preventing means includes a locking groove on the inner wall of the rear end of the shaft cylinder and a locking protrusion on the outer wall of the knock member, or a locking protrusion and a knock on the inner wall of the rear end of the shaft cylinder.
- the structure which consists of a locking groove of the outer wall of a member is disclosed.
- the present invention solves this conventional problem, and is intended to provide a knock-type writing instrument that can reliably prevent a knock member having a clip from rotating with respect to a shaft tube even in a pen tip immersion state. It is.
- the pen tip protruding state refers to a state in which the pen tip protrudes from the front end of the shaft cylinder
- the pen tip immersive state refers to a state in which the pen tip is immersed in the shaft cylinder.
- a knock type writing instrument 1 includes a shaft cylinder 2, a writing body 3 accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction, and a rear end portion of the shaft cylinder 2.
- a knock member 9 provided with a clip 91, and a retracting mechanism that allows the pen tip 31 of the writing body 3 to protrude and retract from the front end of the barrel 2 by pressing the knock member 9 forward.
- a mechanism is formed on the inner surface of the shaft tube 2 and is arranged in a plurality of cam teeth 61 and cam grooves 62 extending in the front-rear direction alternately arranged along the circumferential direction, and rotatably arranged behind the writing body 3.
- a rotating member 7 having a plurality of protrusions 75 that can alternately engage with the cam teeth 61 or the cam grooves 62, and a plurality of cam protrusions 83 that are connected to the knock member 9 and rotate the rotating member 7. And a cam groove 62 on the inner surface of the shaft tube 2.
- a knock-type writing instrument comprising a cam member 8 having a plurality of engaging protrusions 84 that are movably engaged rearwardly and a resilient body 10 that urges the writing body 3 backward, wherein the knocking member 9 and the cam member 8 are engaged with each other.
- the engagement protrusion 84 of the cam member 8 and the cam groove 62 of the inner surface of the shaft cylinder 2 are always engaged, and the knock member 9 and the cam member By engaging with the rotation stop 8, the knock member 9 provided with the clip 91 and the shaft cylinder 2 can be reliably prevented from rotating even in the pen tip immersion state.
- the clip 91 of the knock member 9 of the present invention protrudes radially outward from the outer surface of the shaft tube 2 and has a function of sandwiching an object to be clamped such as a pocket with the outer surface of the shaft tube 2.
- the anti-rotation engagement according to the present embodiment may be an engagement structure that prevents the knock member 9 and the cam member 8 from rotating relative to each other.
- the front end wall of the knock member 9 and the rear end of the cam member 8 may be used.
- a structure in which the walls are engaged a structure in which the side walls of the knock member 9 and the cam member 8 are engaged with each other on the inner side or the outer side, or a front end wall of the knock member 9 and a rear end wall of the cam member 8 And a structure in which the side walls of the knock member 9 and the cam member 8 are engaged with each other on the inner side and the outer side.
- the knock type writing instrument 1 is the knocking writing instrument 1 according to the first embodiment, wherein the knock member 9 includes a cylindrical portion 93 that is inserted into a rear end opening of the shaft tube 2.
- the cam member 8 includes an insertion portion 82 that is inserted into the cylindrical portion 93, and the inner wall of the cylindrical portion 93 and the outer wall of the insertion portion 82 are engaged with each other by rotation prevention.
- the knock type writing instrument 1 which concerns on a 2nd embodiment acquires the reliable rotation prevention structure of the knock member 9 and the cam member 8 by employ
- a plurality of recesses 93 b extending in the front-rear direction are formed on the inner surface of the cylindrical portion 93, and the outer surface of the insertion portion 82 is formed.
- a plurality of convex portions 85 that can be engaged with the concave portion 93b are formed, and the knock member 9 and the cam member 8 are prevented from rotating by engagement between the concave portion 93b and the convex portion 85.
- the knock type writing instrument 1 obtains a more reliable rotation prevention structure of the knock member 9 and the cam member 8 by adopting the above configuration.
- the amount of play in the rotational direction between the cam groove 62 and the engagement protrusion 84 is such that the recess 93b and the protrusion 85. Is set larger than the amount of play in the rotation direction.
- the knock-type writing instrument 1 according to the fourth embodiment adopts the above-described configuration, so that the engagement between the concave portion 93b on the inner surface of the knock member 9 and the convex portion 85 on the outer surface of the cam member 8 may be displaced in the rotational direction.
- the cam groove 62 on the inner surface of the shaft tube 2 and the engagement protrusion 84 on the outer surface of the cam member 8 are properly engaged, and the occurrence of poor sliding between the cam groove 62 and the engagement protrusion 84 can be suppressed.
- the knock type writing instrument 1 is the locking wall portion for locking the engaging protrusion 84 in the front-rear direction in the pen tip immersion state in any of the first to fourth embodiments.
- 63 is formed at the rear end of the cam groove 62
- a guide groove 65 extending in the front-rear direction communicating with the cam groove 62 is formed behind the cam groove 62 on the inner surface of the shaft cylinder 2
- the knock member 9 A guide projection 93a is formed on the outer surface of the cylindrical portion 93, and the guide projection 93a is engaged with the guide groove 65 in the pen tip immersion state, and the guide projection 93a is engaged with the cam groove 62 in the pen tip protruding state.
- the knock type writing instrument 1 according to the fifth embodiment employs the above-described configuration, whereby the rotation of the knock member 9 is further prevented by the engagement between the guide groove 65 and the guide protrusion 93a in the pen tip immersion state.
- the knock type writing instrument 1 according to the fifth aspect of the present invention adopts the above-described configuration, so that it is not necessary to form the guide groove 65 having a length corresponding to the knock stroke of the knock member 9, and the shaft behind the cam groove 62 is provided.
- the longitudinal dimension of the tube 2 can be set short, and as a result, the degree of freedom in designing the knock member 9 and the shaft tube 2 increases.
- the knock type writing instrument 1 is the knock writing instrument 1 according to any one of the first to fifth embodiments, wherein the knock member 9 is integrally connected to the clip 91 and the rear portion of the clip 91.
- the rear end portion of the shaft tube 2 extends in the front-rear direction on the side wall of the rear end portion of the shaft tube 2.
- a slide hole 64 that is opened to the rear is formed, and the front end of the clip base 92 is inserted into the slide hole 64 in a pen tip protruding state, and the front end of the clip base 92 is inserted into the slide hole 64 in a pen tip immersed state. It is located more rearward.
- the knock type writing instrument 1 according to the sixth embodiment can set the length of the clip base 92 in the longitudinal direction to a sufficient length by adopting the above configuration, and can improve the durability of the clip 91. .
- a plurality of convex portions 93e extending in the front-rear direction are formed on the inner surface of the cylindrical portion 93, and the outer surface of the insertion portion 82 is formed.
- a plurality of recesses 88 that can be engaged with the projections 93e are formed, and the knock member 9 and the cam member 8 are prevented from rotating by engagement between the projections 93e and the recesses 88. .
- the knock type writing instrument 1 according to the seventh embodiment obtains a more reliable rotation prevention structure of the knock member 9 and the cam member 8 by adopting the above configuration.
- the amount of play in the rotational direction between the cam groove 62 and the engagement protrusion 84 is such that the convex portion 93e and the concave portion 88 are provided. Is set larger than the amount of play in the rotation direction.
- the knock type writing instrument 1 according to the eighth embodiment adopts the above-described configuration, so that the engagement between the convex portion 93e on the inner surface of the knock member 9 and the concave portion 88 on the outer surface of the cam member 8 may be displaced in the rotational direction.
- the cam groove 62 on the inner surface of the shaft tube 2 and the engagement protrusion 84 on the outer surface of the cam member 8 are properly engaged, and the occurrence of poor sliding between the cam groove 62 and the engagement protrusion 84 can be suppressed.
- the locking wall portion 63 that locks the engaging protrusion 84 in the front-rear direction in the pen tip immersion state
- a guide groove 65 formed in the rear end of the cam groove 62 and extending in the front-rear direction communicating with the cam groove 62 is formed behind the cam groove 62 on the inner surface of the shaft cylinder 2.
- a guide protrusion 93a is formed on the outer surface of the portion 93, and the guide protrusion 93a is engaged with the guide groove 65 in the pen tip immersion state, and the guide protrusion 93a is engaged with the cam groove 62 in the pen tip protruding state.
- the knock type writing instrument 1 according to the ninth embodiment adopts the above-described configuration, whereby the rotation of the knock member 9 is further prevented by the engagement between the guide groove 65 and the guide protrusion 93a in the pen tip immersion state. Further, the knock type writing instrument 1 according to the ninth embodiment does not need to form the guide groove 65 having a length corresponding to the knock stroke of the knock member 9 by adopting the above-described configuration, and is behind the cam groove 62.
- the longitudinal dimension of the shaft tube 2 can be set short, and as a result, the degree of freedom in designing the knock member 9 and the shaft tube 2 increases.
- the knock member 9 is integrally connected to the clip 91 and the rear portion of the clip 91.
- the clip base 92 and the tubular portion 93 provided integrally with the clip base 92.
- the clip base 92 extends in the front-rear direction on the side wall of the rear end portion of the shaft tube 2 and is rearward of the shaft tube 2.
- a slide hole 64 opened rearward from the end is formed, the front end portion of the clip base 92 is inserted into the slide hole 64 in a pen tip protruding state, and the front end portion of the clip base 92 is inserted into the slide hole in a pen tip immersed state. It is located behind 64.
- the knock type writing instrument 1 can set the length of the clip base 92 in the longitudinal direction to a sufficient length by adopting the above configuration, and can improve the durability of the clip.
- the cam member 8 includes a cylindrical portion 89, and the knock member 9 is in the cylindrical portion 89 of the cam member 8. And an inner wall of the tubular portion 89 and an outer wall of the insertion portion 95 are engaged with each other by rotation prevention.
- the knock type writing instrument 1 obtains a reliable rotation prevention structure for the knock member 9 and the cam member 8 by adopting the above configuration.
- a plurality of recesses 89 a extending in the front-rear direction are formed on the inner surface of the cylindrical portion 89, and the outer surface of the insertion portion 95 is formed.
- a plurality of convex portions 95a that can be engaged with the concave portion 89a are formed, and the knock member 9 and the cam member 8 are non-rotatably engaged by the engagement between the concave portion 89a and the convex portion 95a.
- the knock type writing instrument 1 obtains a more reliable rotation prevention structure of the knock member 9 and the cam member 8 by adopting the above configuration.
- a knock type writing instrument is the knocking writing instrument according to the twelfth embodiment, wherein the cam groove 62 and the engaging projection 84 have an amount of play in the rotational direction of the concave portion 89a and the convex portion 95a. It is set larger than the amount of play in the rotation direction.
- the knock-type writing instrument 1 adopts the above-described configuration, so that even if a displacement in the rotational direction occurs in the engagement between the convex portion 95a on the outer surface of the knock member 9 and the concave portion 89a on the inner surface of the cam member 8.
- the cam groove 62 on the inner surface of the shaft tube 2 and the engagement protrusion 84 on the outer surface of the cam member 8 are properly engaged, and the occurrence of poor sliding between the cam groove 62 and the engagement protrusion 84 can be suppressed.
- the knock type writing instrument 1 is the knock writing instrument 1 according to any one of the eleventh to thirteenth embodiments, wherein the knock member 9 is integrally connected to the clip 91 and the rear portion of the clip 91.
- a clip base 92, and the insertion portion 95 provided integrally with the clip base 92.
- the rear end of the shaft tube 2 extends in the front-rear direction on the side wall of the rear end of the shaft tube 2.
- a slide hole 64 that is opened to the rear is formed, and the front end of the clip base 92 is inserted into the slide hole 64 in a pen tip protruding state, and the front end of the clip base 92 is inserted into the slide hole 64 in a pen tip immersed state. It is located more rearward.
- the knocking writing instrument 1 according to the fourteenth embodiment can set the length of the clip base 92 in the longitudinal direction to a sufficient length, and can improve the durability of the clip.
- a plurality of convex portions 89 d extending in the front-rear direction are formed on the inner surface of the cylindrical portion 89, and the outer surface of the insertion portion 95 is formed.
- a plurality of concave portions 95d that can be engaged with the convex portion 89d are formed, and the knock member 9 and the cam member 8 are prevented from rotating by engagement between the convex portion 89d and the concave portion 95d.
- the knock type writing instrument 1 obtains a more reliable rotation prevention structure between the knock member 9 and the cam member 8 by adopting the above configuration.
- the knocking writing instrument 1 according to the sixteenth embodiment of the present invention is the fifteenth embodiment, wherein the cam groove 62 and the engaging protrusion 84 have an amount of play in the rotational direction of the convex portion 89d and the concave portion 95d. Is set larger than the amount of play in the rotation direction.
- the knock type writing instrument 1 adopts the above-described configuration, so that even if a positional deviation in the rotational direction occurs in the engagement between the concave portion 95d on the outer surface of the knock member 9 and the convex portion 89d on the inner surface of the cam member 8.
- the cam groove 62 on the inner surface of the shaft tube 2 and the engagement protrusion 84 on the outer surface of the cam member 8 are properly engaged, and the occurrence of poor sliding between the cam groove 62 and the engagement protrusion 84 can be suppressed.
- the knock type writing instrument 1 is the clip according to the fifteenth or sixteenth embodiment, wherein the knock member 9 is integrally connected to the clip 91 and the rear portion of the clip 91.
- the insertion portion 95 extends in the front-rear direction on the side wall of the rear end of the shaft tube 2 and opens rearward from the rear end of the shaft tube.
- the front end of the clip base 92 is inserted into the slide hole 64 when the pen tip protrudes, and the front end of the clip base 92 is positioned behind the slide hole 64 when the pen tip is immersed. Do it.
- the knock-type writing instrument 1 according to the seventeenth embodiment adopts the above configuration, whereby the length of the clip base 92 in the longitudinal direction can be set to a sufficient length, and the durability of the clip can be improved.
- a knock type writing instrument 1 includes a shaft cylinder 2, a writing body 3 accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction, and a rear end portion of the shaft cylinder 2.
- a knock member 9 provided, and a retracting mechanism that allows the pen tip 31 of the writing body 3 to be protruded and retracted from the front end of the shaft cylinder 2 by pressing the knock member 9 forward, and the retracting mechanism includes the shaft
- a plurality of cam teeth 61 and cam grooves 62 that are formed on the inner surface of the cylinder 2 and that are alternately arranged along the circumferential direction and extend in the front-rear direction, are rotatably disposed behind the writing body 3, and the cam teeth 61
- the rotating member 7 having a plurality of protrusions 75 that can alternately engage with the cam groove 62 and the cam member 83 connected to the knock member 9 and rotating the rotating member 7 and the shaft It is engaged with the cam groove 62 on the inner surface of the cylinder 2 so as to be movable back and forth.
- a knock type writing instrument 1 comprising a cam member 8 having a number of engaging projections 84 and a resilient body 10 that biases the writing body 3 backward, wherein the knocking member
- the engagement protrusion 84 of the cam member 8 and the cam groove 62 on the inner surface of the shaft cylinder 2 are always engaged, and the knock member 9 and the cam member By being engaged with the rotation stop 8, the knock member 9 and the shaft tube 2 can be reliably prevented from rotating even in the pen tip immersion state.
- the knock member 9 according to the eighteenth embodiment includes a clip that protrudes radially outward from the outer surface of the shaft tube 2 and has a function of sandwiching a sandwiched object such as a pocket with the outer surface of the shaft tube 2.
- a structure may be sufficient, and the structure provided with the protrusion part which protruded in the radial direction from the outer surface of the axial cylinder which does not have the function to clamp
- the anti-rotation engagement according to the eighteenth embodiment may be any engagement structure that prevents the knock member 9 and the cam member 8 from rotating relative to each other.
- the front end wall of the knock member 9 and the cam member 8 A structure in which the rear end wall is engaged, a structure in which the side walls of the knock member 9 and the cam member 8 are engaged with each other on the inner side and the outer side, or a front end wall of the knock member 9 and a rear end wall of the cam member 8 Are engaged, and the side walls of both the knock member 9 and the cam member 8 are engaged on the inside and the outside.
- a knock type writing instrument 1 includes a shaft cylinder 2, a writing body 3 accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction, and a rear end portion of the shaft cylinder 2.
- a knock member 9 provided on the outer surface and having a projecting portion projecting radially outward, and by pressing the knock member 9 forward, the pen tip 31 of the writing body 3 can be made to appear and retract from the front end of the shaft cylinder 2.
- a plurality of cam teeth 61 and cam grooves 62 formed in the inner surface of the shaft cylinder 2 and arranged alternately along the circumferential direction, and the writing body.
- a rotating member 7 having a plurality of protrusions 75 that are rotatably arranged behind the cam teeth 61 or alternately engageable with the cam grooves 61 and the knock member 9, and are connected to the rotating member 7.
- Knock-type writing instrument comprising a cam member 8 having a plurality of engaging projections 84 that are engaged with a cam groove 62 on the inner surface so as to be movable back and forth, and a resilient body 10 that urges the writing body 3 backward. 1 in which the knock member 9 and the cam member 8 are engaged with each other.
- the engagement protrusion 84 of the cam member 8 and the cam groove 62 of the inner surface of the shaft cylinder 2 are always engaged, and the knock member 9 and the cam member By being engaged with the rotation stop 8, the knock member 9 and the shaft tube 2 can be reliably prevented from rotating even in the pen tip immersion state.
- the protrusion of the knock member 9 according to the nineteenth embodiment is simply a protrusion protruding in the radial direction from the outer surface of the shaft cylinder, which does not have a function of sandwiching an object to be clamped such as a pocket with the outer surface of the shaft cylinder.
- the anti-rotation engagement according to the nineteenth embodiment may be an engagement structure that prevents the knock member 9 and the cam member 8 from rotating relative to each other.
- the front end wall of the knock member 9 and the cam member 8 A structure in which the rear end wall is engaged, a structure in which the side walls of the knock member 9 and the cam member 8 are engaged with each other on the inner side and the outer side, or a front end wall of the knock member 9 and a rear end wall of the cam member 8 Are engaged, and the side walls of both the knock member 9 and the cam member 8 are engaged on the inside and the outside.
- the knock-type writing instrument 1 contains the thermochromic ink 34 in a cursive body 3 and can eject the thermochromic ink 34 to the front end of the cursive body 3.
- the writing body 3 is accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction, a knock member 9 is provided at the rear end of the shaft cylinder 2, and the knock member 9 is pressed forward to thereby
- the pen tip 31 is made to protrude from the front end hole 41 of the shaft cylinder 2, and the pen tip protruding state is released by pressing the knock member 9 forward again, and the pen tip 31 is moved to the front end hole of the shaft cylinder 2.
- the knock member 9 includes a main body portion 93 that can be inserted into the rear end portion of the shaft tube 2, and a protruding portion 92 that protrudes radially outward on the outer surface of the main body portion 93, A slide hole 64 extending in the front-rear direction and opened rearward from the rear end of the shaft tube 2 is formed on the side wall of the rear end portion of the shaft tube 2, and the front end portion of the protrusion 92 is in the pen tip protruding state.
- a guide groove 65 extending in the front-rear direction and opened rearward from the rear end of the shaft cylinder is formed on the inner surface of the side wall of the rear end portion of the shaft cylinder 2.
- a guide protrusion 93a that can be engaged with and disengaged in the circumferential direction with the guide groove 65 is formed on the outer surface of the main body portion 93 of the knock member 9, and the knock member 9 is configured to be rotatable with respect to the shaft tube 2 in the pen tip immersion state.
- the protrusion 92 is inserted into the slide hole 64 in a state where the guide protrusion 93a is engaged with the guide groove 65, and the knock member 9 is movable in the front-rear direction.
- the protrusion 92 of the knock member 9 is restricted to the rear end of the shaft cylinder 2 in a state where the guide protrusion 93a is disengaged from the guide groove 65, and movement of the knock member 9 in the front-rear direction is prevented. Is done.
- the protruding and retracting mechanism is formed on the inner surface of the shaft cylinder 2 and is alternately arranged along the circumferential direction.
- the plurality of cam teeth 61 and cam grooves 62 extend in the front-rear direction.
- a rotating member 7 having a plurality of protrusions 75 that are rotatably arranged behind the writing body 3 and can be alternately engaged with the cam teeth 61 or the cam grooves 62, and the knock member 9.
- a cam member 8 having a plurality of cam projections 83 for rotating the rotating member 7 and having a plurality of engagement projections 84 engaged with a cam groove 62 on the inner surface of the shaft tube 2 so as to be movable back and forth.
- the front end portion of the knock member bullet 11 is locked to a locking portion 77 on the inner surface of the rotating member 7, and the rear end portion of the knock member bullet 11 is on the inner surface of the cam member 8. Locked to the locking portion 81b.
- the knock member 9 connected to the cam member 8 is always urged rearward by the knock member elastic body 11, and the projecting portion 92 of the knock member 9 is also slid even in a pen tip protruding state. It is located rearwardly from the hole 64. Thereby, the knock member 9 can be rotated in any state of the pen tip protruding state and the pen tip immersed state, and the friction operation can be started quickly.
- the elastic force of the bullet member 11 for the knock member is set smaller than the elastic force of the elastic member 10.
- the knock type writing instrument of the present invention can reliably prevent the knock member having the clip from rotating with respect to the shaft tube even in the pen tip immersion state.
- FIG. 4 is an enlarged sectional view taken along line AA in FIG. 3.
- FIG. 4 is an enlarged sectional view taken along line BB in FIG. 3.
- FIG. 3 is an enlarged vertical sectional view of a main part of FIG. 2.
- FIG. 7 is an enlarged sectional view taken along the line CC of FIG. 6.
- FIG. 7 is a view taken along line DD in FIG. 6.
- FIG. 6 is an enlarged cross-sectional view of a main part of FIG. 5 showing an engagement state between an engagement protrusion and a cam groove according to the first embodiment of the present invention. It is a principal part expanded sectional view of FIG.
- FIG. 30 is a cross-sectional view taken along line EE of FIG. 29. It is a principal part perspective view of FIG. It is a divided figure which shows the main components of the intrusion mechanism of the 5th Embodiment of this invention. It is a principal part expanded longitudinal cross-sectional view which shows the structure which added the bullet member for knock members of the 5th Embodiment of this invention.
- the knock-type writing instrument 1 has a shaft tube 2, a writing body 3 accommodated in the shaft tube 2, and a protrusion and recess that allows the pen tip 31 of the writing body 3 to protrude and retract from the front end hole 41 of the shaft tube 2. And a mechanism.
- the cursive body 3 includes a pen tip 31, an ink storage tube 32 in which the pen tip 31 is press-fitted and fixed to the front end opening, an ink 34 filled in the ink storage tube 32, and a rear end of the ink 34.
- a follower 35 (for example, a high-viscosity fluid) that is filled and moves forward as the ink 34 is consumed.
- the nib 31 has, for example, either a configuration composed of only a metal ballpoint pen holding a ball rotatably at the front end, or a configuration composed of a synthetic resin nib holder holding the rear outer surface of the ballpoint pen tip. Also good.
- a tail plug 33 having a vent hole through which the ink containing tube 32 and the outside can be vented is attached to the rear end opening of the ink containing tube 32.
- the shaft cylinder 2 includes a front shaft 4, an intermediate shaft 5 connected to the rear end portion of the front shaft 4, and a rear shaft 6 connected to the rear end portion of the intermediate shaft 5.
- the front shaft 4 is a tapered cylindrical body made of metal or synthetic resin. At the front end of the front shaft 4, a front end hole 41 through which the pen tip 31 protrudes and protrudes in the axial direction. On the inner surface of the front shaft 4, a projecting body comprising a holding wall portion 42a to which the outer peripheral surface of the front end portion of the projecting body 10 is fitted, and a locking step portion 42b to which the front end of the projecting body 10 is locked.
- the holding part 42 is integrally formed.
- a female screw part is formed on the inner surface of the rear end opening of the front shaft 4.
- the intermediate shaft 5 is a cylindrical body having both ends made of synthetic resin. On the outer surface of the front end portion of the intermediate shaft 5, a male screw portion that can be screwed with the female screw portion of the front shaft 4 is formed. On the outer surface of the rear end portion of the intermediate shaft 5, a male screw portion that can be screwed with the female screw portion of the rear shaft 6 is formed. A grip portion 51 made of an elastic material is formed on the outer surface of the intermediate portion of the intermediate shaft 5. The grip portion 51 is provided on the outer surface of the front shaft 4 by two-color molding or attachment of another member.
- the rear shaft 6 is a cylindrical body having both ends made of synthetic resin.
- a female screw portion that can be screwed with the male screw portion on the outer surface of the rear end portion of the intermediate shaft 5 is formed.
- a plurality of (for example, four) cam teeth 61 and a cam groove 62 extending in the front-rear direction are integrally formed on the rear inner surface of the rear shaft 6.
- the cam teeth 61 and the cam grooves 62 are alternately arranged along the circumferential direction.
- Each cam tooth 61 is formed with a cam guide groove 62a extending in the front-rear direction.
- the cam guide grooves 62a and the cam grooves 62 are alternately arranged at equal intervals along the circumferential direction.
- a locking wall 63 is integrally formed at the rear end of the cam groove 62.
- a slide hole 64 that is opened rearward from the rear end of the rear shaft 6 and extends in the front-rear direction is formed on the side wall of the rear shaft 6 behind the locking wall portion 63.
- One guide groove 65 extending in the front-rear direction is formed on the inner surface of the rear end opening of the rear shaft 6 on the opposite side of the slide hole 64.
- the guide groove 65 passes through the locking wall portion 63 and communicates with the cam groove 62.
- the slide hole 64 includes a narrow front hole 64a and a wide rear hole 64b communicating with the front hole 64a and opened rearward.
- a slide groove 66 is formed in which the ball portion 91a of the clip 91 can be engaged.
- the length of the slide groove 66 in the front-rear direction is formed to a length corresponding to the knock stroke of the knock member 9.
- the length of the slide hole 64 in the front-rear direction is not formed to a length corresponding to the knock stroke of the knock member 9 but is formed shorter than the length of the slide groove 66 in the front-rear direction.
- the intrusion mechanism is a knock type intrusion mechanism using a rotating cam mechanism.
- the retracting mechanism includes a cam tooth 61 and a cam groove 62 formed on the inner surface of the shaft cylinder 2 (the inner surface of the rear shaft 6), and a rotating member that engages with the cam tooth 61 or the cam groove 62 and contacts the rear end of the writing body 3. 7, a cam member 8 that engages with the rotating member 7 and the cam groove 62, a knock member 9 that is connected to the cam member 8, and a bullet that is accommodated in the shaft cylinder 2 and biases the writing body 3 backward.
- a body 10 (for example, a compression coil spring).
- the retracting mechanism of this embodiment is a double knock type in which both the pen tip protruding operation and the pen tip retracting operation push the knock member 9 forward.
- the rotating member 7 is a cylindrical body having both ends made of synthetic resin.
- An annular flange 71 is formed at the front end of the rotating member 7.
- a large-diameter cylindrical portion 72 is formed behind the annular flange 71 of the rotating member 7.
- a small-diameter cylindrical portion 73 having an outer diameter smaller than the outer diameter of the large-diameter cylindrical portion 72 is formed behind the large-diameter cylindrical portion 72 of the rotating member 7.
- a stepped portion 74 is formed on the inner surface of the front end portion of the rotating member 7. The step 74 is brought into contact with the rear end of the cursive body 3 (the tail plug 33 attached to the rear end of the cursive body 3).
- a plurality of (for example, four) protrusions 75 extending in the front-rear direction that can be engaged with the cam groove 62 are formed on the outer surface of the large-diameter cylindrical portion 72 (the rear side of the annular flange 71 and the front side of the small-diameter cylindrical portion 73).
- a cam slope 76 that can contact the cam teeth 61 and the cam protrusion 83 of the cam member 8 is formed.
- the small diameter cylindrical portion 73 is loosely inserted into the inner surface of the front end portion of the cam member 8 (the inner surface of the large diameter front portion 81).
- Cam member The cam member 8 is a bottomed cylindrical body made of a synthetic resin having a front end opened and a rear end closed.
- the cam member 8 includes a large-diameter front portion 81 and a small-diameter rear portion 82 (insertion portion) integrally connected to the rear of the front portion 81 and having an outer diameter smaller than the outer diameter of the front portion 81.
- On the front end surface of the cam member 8 (the front end surface of the large-diameter front portion 81), a plurality of (for example, eight) saw blade-shaped (mountain-shaped) cam projections 83 are continuously provided in a circumferential shape.
- a plurality of (for example, eight) engaging protrusions 84 are formed in a distributed manner along the circumferential direction.
- Each engagement protrusion 84 is provided behind each cam protrusion 83.
- the engaging protrusion 84 is locked to the locking wall portion 63 in the front-rear direction.
- the engagement protrusion 84 and the cam groove 62 are engaged in a state having a play amount in the rotation direction.
- the engagement protrusion 84 and the cam guide groove 62a are engaged in a state having a play amount in the rotation direction. Specifically, as shown in FIG.
- the width dimension S1 of the cam groove 62, the engagement protrusion 84, and the width dimension S2 have a difference of 0.19 mm.
- the width dimension of the cam guide groove 62a and the width dimension of the engagement protrusion 84 have a difference of 0.19 mm.
- the play amount (S1-S2) is preferably set in the range of 0.16 to 0.25 mm, more preferably 0.18 to 0.21 mm. However, this play amount (0.19 mm) is an example, and any other value can be adopted.
- a plurality of (for example, four) convex portions 85 extending in the front-rear direction are formed at equal intervals along the circumferential direction on the outer surface (base outer surface) of the front end portion of the small-diameter rear portion 82 (insertion portion) of the cam member 8.
- the A first outward projection 86 is formed on the outer surface of the small-diameter rear portion 82 (insertion portion) behind the convex portion 85.
- a second outward projection 87 is formed on the outer surface of the small-diameter rear portion 82 (insertion portion) behind the first outward projection 86.
- the first outward protrusion 86 and the second outward protrusion 87 are formed by an annular protrusion or a plurality of dispersed protrusions.
- the outer diameter of the first outward projection 86 is set to be larger than the outer diameter of the second outward projection 87, whereby the small-diameter rear portion 82 (insertion portion) can be smoothly and easily inserted into the tubular portion 93. Can do.
- the knock member 9 includes a clip 91 that extends in the front-rear direction, a clip base 92 that is integrally connected to the rear portion of the clip 91, and a bottomed cylindrical portion 93 that is integrally connected to the clip base 92. And is formed from a synthetic resin.
- a ball portion 91 a is integrally projected on the inner surface of the clip 91.
- the clip base portion 92 is integrally connected to a plate-like first connecting wall portion 92a extending in the front-rear direction and a rear end of the first connecting wall portion 92a, and extends in a direction perpendicular to the axis. 2 connecting wall portions 92b. Thereby, the durability of the clip base 92 is improved.
- bowl part 91a of the clip 91 is formed in the plate shape extended in the front-back direction, and is engaged with the slide groove
- the clip base 92 can be inserted into the slide hole 64.
- the knock member 9 When the knock member 9 is pushed forward when changing from the pen tip immersion state to the pen tip protruding state, the first connection wall portion 92a is inserted into the narrow front hole 64a of the slide hole 64, and the second connection The wall portion 92 b is inserted into the wide rear hole 64 b of the slide hole 64. Thereby, when the knock member 9 is pressed forward, the rotation of the clip 91 can be further prevented.
- One guide projection 93a is integrally formed on the outer surface of the cylindrical portion 93 opposite to the clip base 92 in the radial direction.
- a plurality of (for example, eight) recesses 93b extending in the front-rear direction are formed on the inner surface of the front end opening of the cylindrical portion 93 at equal intervals along the circumferential direction.
- Each recess 93 b is opened forward from the front end of the cylindrical portion 93.
- a first inward projection 93 c is formed on the inner surface of the cylindrical portion 93 behind the recess 93 b.
- a second inward projection 93d is formed on the inner surface of the cylindrical portion 93 behind the first inward projection 93c.
- the first inward projection 93c and the second inward projection 93d are formed by an annular projection or a plurality of dispersed projections.
- the inner diameter of the first inward projection 93c is set to be larger than the inner diameter of the second inward projection 93d, whereby the small-diameter rear portion 82 (insertion portion) can be smoothly and easily inserted into the cylindrical portion 93. .
- a pressing operation surface knock surface having the same plane is formed on the rear end surface of the clip 91, the rear end surface of the clip base portion 92 (second connecting wall portion 92b), and the rear end surface of the tubular portion 93.
- a small-diameter rear portion 82 (insertion portion) of the cam member 8 is inserted into the cylindrical portion 93, and the inner surface of the cylindrical portion 93 and the outer surface of the small-diameter rear portion 82 are connected by fitting.
- the concave portion 93b of the inner surface of the cylindrical portion 93 and the convex portion 85 of the outer surface of the small diameter rear portion 82 are engaged, and ( b) The first inward projection 93c on the inner surface of the cylindrical portion 93 and the first outward projection 86 on the outer surface of the small-diameter rear portion 82 get over and locked, and (c) the second inward projection on the inner surface of the cylindrical portion 93.
- a contact step 81 a is formed at the rear end of the large-diameter front portion 81, and the contact step 81 a and the front end of the tubular portion 93 are contacted.
- the concave portion 93b and the convex portion 85 are engaged with each other in a state of having a play in the rotational direction.
- the amount of play in the rotational direction between the cam groove 62 and the engagement protrusion 84 is set larger than the amount of play in the rotational direction between the concave portion 93 b and the convex portion 85.
- the width dimension T1 of the concave part 93b on the inner surface of the cylindrical part 93 and the width dimension T2 of the convex part 85 on the outer surface of the small-diameter rear part 82 have a difference of 0.10 mm.
- the play amount (T1-T2) is preferably set in the range of 0.01 to 0.15 mm, more preferably 0.01 to 0.12 mm. That is, in the present embodiment, the amount of play in the rotational direction between the cam groove 62 and the engagement protrusion 84 is set larger than the amount of play in the rotational direction between the concave portion 93 b and the convex portion 85.
- this play amount (0.10 mm) is an example, and the amount of play in the rotational direction between the cam groove 62 and the engagement protrusion 84 is set to be larger than the amount of play in the rotational direction between the concave portion 93 b and the convex portion 85. Any other value can be adopted as long as it is.
- the guide protrusion 93a of the knock member 9 is engaged with a guide groove 65 on the inner surface of the rear end opening of the rear shaft 6 and a cam groove 62 communicating with the guide groove 65 in the front-rear direction so as to be movable in the front-rear direction.
- the guide protrusion 93a is engaged with the guide groove 65 in the pen tip immersion state, and the guide protrusion 93a is engaged with the cam groove 62 in the pen tip protruding state.
- the engaging protrusion 84 of the cam member 8 is locked to the locking wall portion 63 at the rear end of the cam groove 62, and the protrusion 75 of the rotating member 7 is engaged to the cam groove 62.
- the cam slope 76 at the rear end of the protrusion 75 of the rotating member 7 is in contact with the cam protrusion 83.
- the cursive body 3 is always urged backward by the bullet 10.
- the writing body 3 can be exchanged. Moreover, since the intermediate shaft 5 and the rear shaft 6 are detachably attached by screwing, the cursive body 3 can be exchanged.
- the knock type writing instrument 1 of the present embodiment includes a shaft cylinder 2, a writing body 3 accommodated in the shaft cylinder 2 so as to be movable in the front-rear direction, and a knock provided at the rear end of the shaft cylinder 2 and having a clip 91.
- a member 9 and a retracting mechanism that allows the pen tip 31 of the writing body 3 to protrude and retract from the front end of the shaft tube 2 by pressing the knock member 9 forward, and the retracting mechanism is formed on the inner surface of the shaft tube 2,
- a plurality of cam teeth 61 and cam grooves 62 extending in the front-rear direction alternately arranged along the circumferential direction, and rotatably arranged behind the writing body 3, and alternately engaged with the cam teeth 61 or the cam grooves 62.
- a rotating member 7 having a plurality of projecting ridges 75 and a plurality of cam projections 83 connected to the knocking member 9 and rotating the rotating member 7, and being freely movable back and forth in the cam groove 62 on the inner surface of the shaft cylinder 2.
- a cam member 8 having a plurality of engaging projections 84 to be combined, and a brush A knock type writing instrument provided with a projecting body 10 for urging the body 3 rearward, wherein the knock member 9 and the cam member 8 are engaged with each other so that the cam member 8 is always engaged.
- the knock member 9 includes a cylindrical portion 93 that is inserted into the rear end opening of the shaft tube 2, and the cam member 8 is inserted into the cylindrical portion 93. 82 and the inner wall of the cylindrical portion 93 and the outer wall of the insertion portion 82 are engaged with each other to prevent rotation, so that a reliable rotation prevention structure between the knock member 9 and the cam member 8 is obtained.
- a plurality of recesses 93b extending in the front-rear direction are formed on the inner surface of the cylindrical portion 93, and a plurality of projections 85 that can be engaged with the recesses 93b are formed on the outer surface of the insertion portion 82.
- the knock member 9 and the cam member 8 are engaged with each other by the engagement between the concave portion 93b and the convex portion 85, so that a more reliable rotation prevention structure between the knock member 9 and the cam member 8 is obtained. .
- the knock type writing instrument 1 of the present embodiment is configured so that the amount of play in the rotational direction between the cam groove 62 and the engagement protrusion 84 is set larger than the amount of play in the rotational direction between the concave portion 93b and the convex portion 85. 9 Even if the rotational displacement occurs in the engagement between the concave portion 93b on the inner surface and the convex portion 85 on the outer surface of the cam member 8, the cam groove 62 on the inner surface of the shaft tube 2 and the engagement protrusion 84 on the outer surface of the cam member 8 are properly Engaged, it is possible to suppress the occurrence of sliding failure between the cam groove 62 and the engagement protrusion 84.
- a locking wall portion 63 in which the engaging projection 84 is locked in the front-rear direction when the pen tip is immersed is formed at the rear end of the cam groove 62, and the cam groove on the inner surface of the shaft cylinder 2 is formed.
- a guide groove 65 extending in the front-rear direction communicating with the cam groove 62 is formed at the rear of 62, and a guide protrusion 93a is formed on the outer surface of the cylindrical portion 93 of the knock member 9, and the guide protrusion 93a guides the pen tip when it is in the immersion state.
- the knock member 9 When the guide protrusion 93a is engaged with the cam groove 62 in the pen tip protruding state by being engaged with the groove 65, the knock member 9 is rotated by the engagement between the guide groove 65 and the guide protrusion 93a in the pen tip retracted state. Is further prevented. Further, the knock type writing instrument 1 of the present embodiment does not need to form the guide groove 65 having a length corresponding to the knock stroke of the knock member 9, and can set the longitudinal dimension of the shaft cylinder 2 behind the cam groove 62 to be short. As a result, the degree of freedom in designing the knock member 9 and the shaft tube 2 increases.
- the knock member 9 includes a clip 91, a clip base 92 provided integrally with the rear portion of the clip 91, and a cylindrical portion 93 provided integrally with the clip base 92.
- a slide hole 64 extending in the front-rear direction and opened rearward from the rear end of the shaft tube 2 is formed on the side wall of the rear end portion of the shaft tube 2, and the front end portion of the clip base 92 is formed in the pen tip protruding state.
- the clip base 92 is inserted into the slide hole 64 and the front end portion of the clip base 92 is located behind the slide hole 64 in the pen tip immersion state, so that the length of the clip base 92 in the longitudinal direction is shorter than when no slide hole is provided. Can be set to a sufficient length, and the durability of the clip 91 can be improved.
- a part of the first embodiment is changed. Specifically, the convex portion 85 of the cam member 8 of the first embodiment is changed to the concave portion 88, and the concave portion 93b of the knock member 9 of the first embodiment is changed to the convex portion 93e.
- Cam member The cam member 8 is a bottomed cylindrical body made of a synthetic resin having a front end opened and a rear end closed.
- the cam member 8 includes a large-diameter front portion 81 and a small-diameter rear portion 82 (insertion portion) integrally connected to the rear of the front portion 81 and having an outer diameter smaller than the outer diameter of the front portion 81.
- On the front end surface of the cam member 8 (the front end surface of the large-diameter front portion 81), a plurality of (for example, eight) saw blade-shaped (mountain-shaped) cam projections 83 are continuously provided in a circumferential shape.
- a plurality of (for example, eight) engaging protrusions 84 are formed in a distributed manner along the circumferential direction.
- Each engagement protrusion 84 is provided behind each cam protrusion 83.
- the engaging protrusion 84 is locked to the locking wall portion 63 in the front-rear direction.
- the engagement protrusion 84 and the cam groove 62 are engaged in a state having a play amount in the rotation direction. Further, the engagement protrusion 84 and the cam guide groove 62a are engaged in a state having a play amount in the rotation direction.
- the width dimension of the cam groove 62 and the engagement protrusion 84 and the width dimension have a difference of 0.19 mm.
- the width dimension of the engagement protrusion 84 and the width dimension of the cam guide groove 62a have a difference of 0.19 mm.
- the play amount is preferably set in the range of 0.16 to 0.25 mm, more preferably 0.18 to 0.21 mm. However, this is an example, and the present invention is not limited to this value.
- a plurality of (for example, four) concave portions 88 extending in the front-rear direction are formed at equal intervals along the circumferential direction on the outer surface (base outer surface) of the front end portion of the small-diameter rear portion 82 (insertion portion) of the cam member 8. .
- a first outward projection 86 is formed on the outer surface of the small-diameter rear portion 82 (insertion portion) behind the recess 88.
- a second outward projection 87 is formed on the outer surface of the small-diameter rear portion 82 (insertion portion) behind the first outward projection 86.
- the first outward protrusion 86 and the second outward protrusion 87 are formed by an annular protrusion or a plurality of dispersed protrusions.
- the outer diameter of the first outward projection 86 is set to be larger than the outer diameter of the second outward projection 87, whereby the small-diameter rear portion 82 (insertion portion) can be smoothly and easily inserted into the tubular portion 93. Can do.
- the knock member 9 includes a clip 91 that extends in the front-rear direction, a clip base 92 that is integrally connected to the rear portion of the clip 91, and a bottomed cylindrical portion 93 that is integrally connected to the clip base 92. And is formed from a synthetic resin.
- a ball portion 91 a is integrally projected on the inner surface of the clip 91.
- the clip base portion 92 is integrally connected to a plate-like first connecting wall portion 92a extending in the front-rear direction and a rear end of the first connecting wall portion 92a, and extends in a direction perpendicular to the axis. 2 connecting wall portions 92b. Thereby, the durability of the clip base 92 is improved.
- bowl part 91a of the clip 91 is formed in the plate shape extended in the front-back direction, and is engaged with the slide groove
- the clip base 92 can be inserted into the slide hole 64.
- the knock member 9 When the knock member 9 is pushed forward when changing from the pen tip immersion state to the pen tip protruding state, the first connection wall portion 92a is inserted into the narrow front hole 64a of the slide hole 64, and the second connection The wall portion 92 b is inserted into the wide rear hole 64 b of the slide hole 64. Thereby, when the knock member 9 is pressed forward, the rotation of the clip 91 can be further prevented.
- One guide projection 93a is integrally formed on the outer surface of the cylindrical portion 93 opposite to the clip base 92 in the radial direction.
- a plurality of (for example, eight) convex portions 93e extending in the front-rear direction are formed at equal intervals along the circumferential direction.
- a first inward projection 93 c is formed on the inner surface of the cylindrical portion 93 behind the convex portion 93 e.
- a second inward projection 93d is formed on the inner surface of the cylindrical portion 93 behind the first inward projection 93c.
- the first inward projection 93c and the second inward projection 93d are formed by an annular projection or a plurality of dispersed projections.
- the inner diameter of the first inward projection 93c is set to be larger than the inner diameter of the second inward projection 93d, whereby the small-diameter rear portion 82 (insertion portion) can be smoothly and easily inserted into the cylindrical portion 93. .
- a pressing operation surface knock surface having the same plane is formed on the rear end surface of the clip 91, the rear end surface of the clip base portion 92 (second connecting wall portion 92b), and the rear end surface of the tubular portion 93.
- a small-diameter rear portion 82 (insertion portion) of the cam member 8 is inserted into the cylindrical portion 93, and the inner surface of the cylindrical portion 93 and the outer surface of the small-diameter rear portion 82 are connected by fitting.
- the convex portion 93e of the inner surface of the cylindrical portion 93 and the concave portion 88 of the outer surface of the small-diameter rear portion 82 are engaged, and ( b)
- the first inward projection 93c on the inner surface of the cylindrical portion 93 and the first outward projection 86 on the outer surface of the small-diameter rear portion 82 get over and locked, and (c) the second inward projection on the inner surface of the cylindrical portion 93.
- a contact step 81 a is formed at the rear end of the large-diameter front portion 81, and the contact step 81 a and the front end of the tubular portion 93 are contacted.
- the amount of play in the rotational direction between the cam groove 62 and the engagement protrusion 84 is set larger than the amount of play in the rotational direction between the convex portion 93e and the concave portion 88.
- the width dimension of the convex part 93e on the inner surface of the cylindrical part 93 and the width dimension of the concave part 88 on the outer surface of the small-diameter rear part 82 have a difference of 0.10 mm.
- the play amount is preferably set in the range of 0.01 to 0.15 mm, more preferably 0.01 to 0.12 mm (however, this is only an example and is not limited to this value). ). That is, in the present embodiment, the amount of play in the rotational direction between the cam groove 62 and the engagement protrusion 84 is set to be larger than the amount of play in the rotational direction between the convex portion 93e and the concave portion 88.
- a part of the first embodiment is changed. Specifically, the insertion portion 82 of the cam member 8 of the first embodiment is changed to the cylindrical portion 89, and the cylindrical portion 93 of the knock member 9 of the first embodiment is changed to the insertion portion 95. is there.
- the cam member cam member 8 is a cylindrical body made of synthetic resin with both ends opened, and includes a cylindrical portion 89.
- a plurality of (for example, eight) saw blade-shaped (mountain-shaped) cam projections 83 are continuously provided in a circumferential shape.
- a plurality of (for example, eight) engaging protrusions 84 are formed on the outer surface of the front end portion of the cam member 8 so as to be distributed along the circumferential direction.
- Each engagement protrusion 84 is provided behind each cam protrusion 83. In the pen tip immersion state, the engagement protrusion 84 is locked to the locking wall portion 63 in the front-rear direction.
- the engagement protrusion 84 and the cam groove 62 are engaged in a state having a play amount in the rotation direction. Further, the engagement protrusion 84 and the cam guide groove 62a are engaged in a state having a play amount in the rotation direction. Specifically, the width dimension of the cam groove 62 and the width dimension of the engagement protrusion 84 have a difference of 0.19 mm. Similarly, the width dimension of the engagement protrusion 84 and the width dimension of the cam guide groove 62a have a difference of 0.19 mm.
- the play amount is preferably set in the range of 0.16 to 0.25 mm, more preferably 0.18 to 0.21 mm. However, this is an example, and the present invention is not limited to this value.
- a plurality of (for example, eight) recesses 89a extending in the front-rear direction are formed at equal intervals in the circumferential direction on the inner surface of the rear end opening of the cylindrical portion 89 of the cam member 8.
- Each recess 89 a is opened rearward from the rear end of the tubular portion 89.
- a first inward projection 89b is formed on the inner surface of the cylindrical portion 89 in front of the recess 89a.
- a second inward projection 89c is formed on the inner surface of the cylindrical portion 89 in front of the first inward projection 89b.
- the first inward protrusion 89b and the second inward protrusion 89c are formed by an annular protrusion or a plurality of dispersed protrusions.
- the inner diameter of the first inward projection 89 b is set to be larger than the inner diameter of the second inward projection 89 c, so that the insertion portion 95 can be smoothly and easily inserted into the cylindrical portion 89.
- the knock member 9 includes a clip 91 extending in the front-rear direction, a clip base 92 integrally connected to the rear portion of the clip 91, and a cylindrical or columnar shaft integrally connected to the clip base 92. 94 and a cylindrical or columnar insertion portion 95 integrally connected in front of the shaft portion 94, and is made of synthetic resin.
- a ball portion 91 a is integrally projected on the inner surface of the clip 91.
- the clip base portion 92 is integrally connected to a plate-like first connecting wall portion 92a extending in the front-rear direction and a rear end of the first connecting wall portion 92a, and extends in a direction perpendicular to the axis. 2 connecting wall portions 92b.
- the durability of the clip base 92 is improved.
- bowl part 91a of the clip 91 is formed in the plate shape extended in the front-back direction, and is engaged with the slide groove
- the clip base 92 can be inserted into the slide hole 64.
- the knock member 9 When the knock member 9 is pushed forward when changing from the pen tip immersion state to the pen tip protruding state, the first connection wall portion 92a is inserted into the narrow front hole 64a of the slide hole 64, and the second connection The wall portion 92 b is inserted into the wide rear hole 64 b of the slide hole 64. Thereby, when the knock member 9 is pressed forward, the rotation of the clip 91 can be further prevented.
- the insertion portion 95 includes a small-diameter front portion and a large-diameter rear portion having an outer diameter larger than that of the small-diameter front portion.
- a plurality of (for example, eight) convex portions 95a extending in the front-rear direction are formed at equal intervals along the circumferential direction.
- a first outward projection 95b is formed on the outer surface of the insertion portion 95 in front of the convex portion 95a (the outer surface of the small-diameter front portion).
- a second outward projection 95c is formed on the outer surface of the insertion portion 95 in front of the first outward projection 95b (the outer surface of the small diameter front portion).
- the first outward projection 95b and the second outward projection 95c are formed by an annular projection or a plurality of dispersed projections.
- the outer diameter of the first outward projection 95b is set to be larger than the outer diameter of the second outward projection 95c, whereby the insertion portion 95 can be smoothly and easily inserted into the cylindrical portion 89.
- the insertion portion 95 of the knock member 9 is inserted into the cylindrical portion 89 of the cam member 8, and the inner surface of the cylindrical portion 89 and the outer surface of the insertion portion 95 are connected by fitting.
- the concave portion 89a of the inner surface of the cylindrical portion 89 and the convex portion 95a of the outer surface of the insertion portion 95 are engaged, and (b) The first inward projection 89b on the inner surface of the cylindrical portion 89 and the first outward projection 95b on the outer surface of the insertion portion 95 are moved over and locked, and (c) the second inward projection 89c on the inner surface of the cylindrical portion 89 is inserted.
- the second outward projection 95c on the outer surface of the portion 95 gets over and is locked.
- the concave portion 89a and the convex portion 95a are locked and engaged with each other with play in the rotational direction.
- the amount of play in the rotational direction between the cam groove 62 and the engagement protrusion 84 is set larger than the amount of play in the rotational direction between the concave portion 89a and the convex portion 95a.
- the width dimension of the concave portion 89a and the width dimension of the convex portion 95a have a difference of 0.10 mm.
- the play amount is preferably set in the range of 0.01 to 0.15 mm, more preferably 0.01 to 0.12 mm (however, this is only an example and is not limited to this value). ).
- the amount of play in the rotational direction between the cam groove 62 and the engagement protrusion 84 is set to be larger than the amount of play in the rotational direction between the concave portion 89a and the convex portion 95a.
- a contact step portion 96 is formed between the shaft portion 94 and the insertion portion 95. After the inner surface of the cylindrical portion 89 and the outer surface of the insertion portion 95 are connected, the contact step portion 95 and the rear end of the cam member 8 are connected to each other. Abutted.
- a part of the first embodiment is changed. Specifically, the insertion portion 82 of the cam member 8 of the first embodiment is changed to the cylindrical portion 89, and the cylindrical portion 93 of the knock member 89 of the first embodiment is changed to the insertion portion 95. is there. Further, this embodiment is a modification of a part of the third embodiment. Specifically, the convex portion 95a of the knock member 9 of the third embodiment is changed to the concave portion 95d, and the concave portion 89a of the cam member 8 of the third embodiment is changed to the convex portion 89d.
- the cam member cam member 8 is a cylindrical body made of synthetic resin with both ends opened, and includes a cylindrical portion 89.
- a plurality of (for example, eight) saw blade-shaped (mountain-shaped) cam projections 83 are continuously provided in a circumferential shape.
- a plurality of (for example, eight) engaging protrusions 84 are formed on the outer surface of the front end portion of the cam member 8 so as to be distributed along the circumferential direction.
- Each engagement protrusion 84 is provided behind each cam protrusion 83. In the pen tip immersion state, the engaging protrusion 84 is locked to the locking wall portion 63 in the front-rear direction.
- the engagement protrusion 84 and the cam groove 62 are engaged in a state having a play amount in the rotation direction. Further, the engagement protrusion 84 and the cam guide groove 62a are engaged in a state having a play amount in the rotation direction. Specifically, the width dimension of the cam groove 62 and the engagement protrusion 84 and the width dimension have a difference of 0.19 mm. Similarly, the width dimension of the engagement protrusion 84 and the width dimension of the cam guide groove 62a have a difference of 0.19 mm.
- the play amount is preferably set in the range of 0.16 to 0.25 mm, more preferably 0.18 to 0.21 mm. However, this is an example, and the present invention is not limited to this value.
- a plurality of (for example, eight) convex portions 89d extending in the front-rear direction are formed at equal intervals along the circumferential direction.
- a first inward projection 89b is formed on the inner surface in front of the convex portion 89b of the cylindrical portion 89.
- a second inward projection 89c is formed on the inner surface of the cylindrical portion 89 in front of the first inward projection 89b.
- the first inward protrusion 89b and the second inward protrusion 89c are formed by an annular protrusion or a plurality of dispersed protrusions.
- the inner diameter of the first inward projection 89 b is set to be larger than the inner diameter of the second inward projection 89 c, so that the insertion portion 95 can be smoothly and easily inserted into the cylindrical portion 89.
- Knock member The knock member 9 includes a clip 91 extending in the front-rear direction, a clip base 92 integrally connected to the rear portion of the clip 91, and a cylindrical or columnar shaft integrally connected to the clip base 92.
- a portion 94 and a cylindrical or columnar insertion portion 95 integrally connected in front of the shaft portion 94 are provided, and are formed of synthetic resin.
- a ball portion 91 a is integrally projected on the inner surface of the clip 91.
- the clip base portion 92 is integrally connected to a plate-like first connecting wall portion 92a extending in the front-rear direction and a rear end of the first connecting wall portion 92a, and extends in a direction perpendicular to the axis. 2 connecting wall portions 92b.
- the durability of the clip base 92 is improved.
- bowl part 91a of the clip 91 is formed in the plate shape extended in the front-back direction, and is engaged with the slide groove
- the clip base 92 can be inserted into the slide hole 64.
- the knock member 9 When the knock member 9 is pushed forward when changing from the pen tip immersion state to the pen tip protruding state, the first connection wall portion 92a is inserted into the narrow front hole 64a of the slide hole 64, and the second connection The wall portion 92 b is inserted into the wide rear hole 64 b of the slide hole 64. Thereby, when the knock member 9 is pressed forward, the rotation of the clip 91 can be further prevented.
- the insertion portion 95 includes a small-diameter front portion and a large-diameter rear portion having an outer diameter larger than that of the small-diameter front portion.
- a plurality of (for example, eight) recesses 95d extending in the front-rear direction are formed on the outer surface of the rear portion of the large diameter at equal intervals along the circumferential direction.
- a first outward projection 95b is formed on the outer surface (the outer surface of the small-diameter front portion) of the insertion portion 95 in front of the recess 95d.
- a second outward projection 95c is formed on the outer surface of the insertion portion 95 in front of the first outward projection 95b (the outer surface of the small diameter front portion).
- the first outward projection 95b and the second outward projection 95c are formed by an annular projection or a plurality of dispersed projections.
- the outer diameter of the first outward projection 95b is set to be larger than the outer diameter of the second outward projection 95c, whereby the insertion portion 95 can be smoothly and easily inserted into the cylindrical portion 89.
- the insertion portion 95 of the knock member 9 is inserted into the cylindrical portion 89 of the cam member 8, and the inner surface of the cylindrical portion 89 and the outer surface of the insertion portion 95 are connected by fitting.
- the convex portion 89d of the inner surface of the cylindrical portion 89 and the concave portion 95d of the outer surface of the insertion portion 95 are engaged, and (b) The first inward projection 89b on the inner surface of the cylindrical portion 89 and the first outward projection 95b on the outer surface of the insertion portion 95 are moved over and locked, and (c) the second inward projection 89c on the inner surface of the cylindrical portion 89 is inserted.
- the second outward projection 95c on the outer surface of the portion 95 gets over and is locked.
- the concave portion 95d and the convex portion 89d are locked and engaged with each other with play in the rotational direction.
- the amount of play in the rotational direction between the cam groove 62 and the engagement protrusion 84 is set larger than the amount of play in the rotational direction between the concave portion 95d and the convex portion 89d.
- the width dimension of the concave portion 95d and the width dimension of the convex portion 89d have a difference of 0.10 mm.
- the play amount is preferably set in the range of 0.01 to 0.15 mm, more preferably 0.01 to 0.12 mm (however, this is only an example and is not limited to this value). ).
- the amount of play in the rotational direction between the cam groove 62 and the engagement protrusion 84 is set to be larger than the amount of play in the rotational direction between the concave portion 95d and the convex portion 89d.
- a contact step portion 96 is formed between the shaft portion 94 and the insertion portion 95. After the inner surface of the cylindrical portion 89 and the outer surface of the insertion portion 95 are connected, the contact step portion 95 and the rear end of the cam member 8 are connected to each other. Abutted.
- the knock-type writing instrument 1 of the present embodiment contains a thermochromic ink 34 inside the cursive body 3, and a pen tip 31 that can eject the thermochromic ink 34 is provided at the front end of the cursive body 3.
- the shaft cylinder 2 is housed so as to be movable in the front-rear direction, a knock member 9 is provided at the rear end portion of the shaft cylinder 2, and the nib 31 is pushed from the front end hole 41 of the shaft cylinder 2 by pressing the knock member 9 forward.
- a protruding / retracting mechanism is provided which releases the pen tip protruding state by pressing the knock member 9 forward again to bring the pen tip 31 into the shaft tube 2 from the front end hole 41 of the shaft tube 2.
- a knock-type writing instrument in which a frictional portion 12 capable of thermally changing the handwriting of the thermochromic ink 34 by frictional heat generated by rubbing the handwriting of the thermochromic ink 34 on the outer surface of the rear end portion of the member 9 is provided.
- the knock member 9 can be inserted into the rear end portion of the shaft tube 2 in the main body portion 93.
- the front end of the protrusion 92 is inserted into the slide hole 64 in the pen tip protruding state, and the front end of the protrusion 92 is positioned behind the slide hole 64 in the pen tip retracted state.
- a guide groove 65 extending in the front-rear direction and opened rearward from the rear end of the shaft cylinder is formed on the inner surface of the side wall of the rear end portion of the cylinder 2, and the guide groove 65 and the periphery of the outer surface of the main body portion 93 of the knock member 9 are formed.
- a guide protrusion 93 a that can be engaged and disengaged in the direction is formed, and the knock member 9 is configured to be rotatable with respect to the shaft cylinder 2 in the pen tip immersion state, and the protrusion is in a state in which the guide protrusion 93 a is engaged with the guide groove 65.
- 92 is inserted into the slide hole 64 and The member 9 is movable in the front-rear direction, and the protrusion 92 of the knock member 9 is restricted to the rear end of the shaft cylinder 2 in a state where the engagement state of the guide protrusion 93a with the guide groove 65 is released, and the knock member 9 Is prevented from moving back and forth.
- the knock type writing instrument 1 includes a shaft tube 2, a writing body 3 accommodated in the shaft tube 2, and a retracting mechanism that allows the pen tip 31 of the writing body 3 to freely protrude and retract from the front end hole 41 of the shaft tube 2.
- the cursive writing body 3 includes a pen tip 31, an ink storage tube 32 in which the pen tip 31 is press-fitted and fixed to the opening, a thermochromic ink 34 filled in the ink storage tube 32, and the heat A follower 35 (for example, a high-viscosity fluid) filled at the rear end of the color-changing ink 34 and moving forward as the thermochromic ink 34 is consumed.
- a thermochromic ink 34 filled in the ink storage tube 32
- the heat A follower 35 for example, a high-viscosity fluid
- the nib 31 has, for example, either a configuration composed of only a metal ballpoint pen holding a ball rotatably at the front end, or a configuration composed of a synthetic resin nib holder holding the rear outer surface of the ballpoint pen tip. Also good.
- a tail plug 33 having a vent hole through which the ink containing tube 32 and the outside can be vented is attached to the rear end opening of the ink containing tube 32.
- the shaft cylinder 2 includes a front shaft 4, an intermediate shaft 5 connected to the rear end portion of the front shaft 4, and a rear shaft 6 connected to the rear end portion of the intermediate shaft 5.
- the front shaft 4 is a tapered cylindrical body made of metal or synthetic resin. At the front end of the front shaft 4, a front end hole 41 through which the pen tip 31 protrudes and protrudes in the axial direction. On the inner surface of the front shaft 4, a projecting body comprising a holding wall portion 42a to which the outer peripheral surface of the front end portion of the projecting body 10 is fitted, and a locking step portion 42b to which the front end of the projecting body 10 is locked.
- the holding part 42 is integrally formed.
- a female screw part is formed on the inner surface of the rear end opening of the front shaft 4.
- the intermediate shaft 5 is a cylindrical body having both ends made of synthetic resin. On the outer surface of the front end portion of the intermediate shaft 5, a male screw portion that can be screwed with the female screw portion of the front shaft 4 is formed. On the outer surface of the rear end portion of the intermediate shaft 5, a male screw portion that can be screwed with the female screw portion of the rear shaft 6 is formed. A grip portion 51 made of an elastic material is formed on the outer surface of the intermediate portion of the intermediate shaft 5. The grip portion 51 is provided on the outer surface of the front shaft 4 by two-color molding or attachment of another member.
- the rear shaft 6 is a cylindrical body having both ends made of synthetic resin.
- a female screw portion that can be screwed with the male screw portion on the outer surface of the rear end portion of the intermediate shaft 5 is formed.
- a plurality of (for example, four) cam teeth 61 and a cam groove 62 extending in the front-rear direction are integrally formed on the rear inner surface of the rear shaft 6.
- the cam teeth 61 and the cam grooves 62 are alternately arranged along the circumferential direction.
- Each cam tooth 61 is formed with a cam guide groove 62a extending in the front-rear direction.
- the cam guide grooves 62a and the cam grooves 62 are alternately arranged at equal intervals along the circumferential direction.
- a locking wall 63 is integrally formed at the rear end of the cam groove 62.
- a slide hole 64 that is opened rearward from the rear end of the rear shaft 6 and extends in the front-rear direction is formed on the side wall of the rear shaft 6 behind the locking wall portion 63.
- One guide groove 65 extending in the front-rear direction is formed on the inner surface of the rear end opening of the rear shaft 6 on the opposite side of the slide hole 64.
- the guide groove 65 passes through the locking wall portion 63 and communicates with the cam groove 62.
- the slide hole 64 includes a narrow front hole 64a and a wide rear hole 64b communicating with the front hole 64a and opened rearward.
- a slide groove 66 in which the ball portion 91 a of the clip 91 can be engaged is formed on the outer surface of the shaft cylinder 2 in front of the slide hole 64. (See Figure 10)
- the intrusion mechanism is a knock type intrusion mechanism using a rotating cam mechanism.
- the retracting mechanism includes a cam tooth 61 and a cam groove 62 formed on the inner surface of the shaft cylinder 2 (the inner surface of the rear shaft 6), and a rotating member that engages with the cam tooth 61 or the cam groove 62 and contacts the rear end of the writing body 3. 7, a cam member 8 that engages with the rotating member 7 and the cam groove 62, a knock member 9 that is connected to the cam member 8, and a bullet that is accommodated in the shaft cylinder 2 and biases the writing body 3 backward.
- a body 10 (for example, a compression coil spring).
- the retracting mechanism of this embodiment is a double knock type in which both the pen tip protruding operation and the pen tip retracting operation push the knock member 9 forward.
- the rotating member 7 is a cylindrical body having both ends made of synthetic resin.
- An annular flange 71 is formed at the front end of the rotating member 7.
- a large-diameter cylindrical portion 72 is formed behind the annular flange 71 of the rotating member 7.
- a small-diameter cylindrical portion 73 having an outer diameter smaller than the outer diameter of the large-diameter cylindrical portion 72 is formed behind the large-diameter cylindrical portion 72 of the rotating member 7.
- a stepped portion 74 is formed on the inner surface of the front end portion of the rotating member 7. The step 74 is brought into contact with the rear end of the cursive body 3 (the tail plug 33 attached to the rear end of the cursive body 3).
- a plurality of (for example, four) protrusions 75 extending in the front-rear direction that can be engaged with the cam groove 62 are formed on the outer surface of the large-diameter cylindrical portion 72 (the rear side of the annular flange 71 and the front side of the small-diameter cylindrical portion 73).
- a cam slope 76 that can contact the cam teeth 61 and the cam protrusion 83 of the cam member 8 is formed.
- the small diameter cylindrical portion 73 is loosely inserted into the inner surface of the front end portion of the cam member 8 (the inner surface of the large diameter front portion 81). (See Figure 11)
- Cam member The cam member 8 is a bottomed cylindrical body made of a synthetic resin having a front end opened and a rear end closed.
- the cam member 8 includes a large-diameter front portion 81 and a small-diameter rear portion 82 (insertion portion) integrally connected to the rear of the front portion 81 and having an outer diameter smaller than the outer diameter of the front portion 81.
- On the front end surface of the cam member 8 (the front end surface of the large-diameter front portion 81), a plurality of (for example, eight) saw blade-shaped (mountain-shaped) cam projections 83 are continuously provided in a circumferential shape.
- a plurality of (for example, eight) engaging protrusions 84 are formed in a distributed manner along the circumferential direction.
- Each engagement protrusion 84 is provided behind each cam protrusion 83.
- the engaging protrusion 84 is locked to the locking wall portion 63 in the front-rear direction.
- the engagement protrusion 84 and the cam groove 62 are engaged in a state having a play amount in the rotation direction. Further, the engagement protrusion 84 and the cam guide groove 62a are engaged in a state having a play amount in the rotation direction.
- a first outward projection 86 is formed on the outer surface of the small-diameter rear portion 82 (insertion portion) of the cam member 8.
- a second outward projection 87 is formed on the outer surface of the small-diameter rear portion 82 (insertion portion) behind the first outward projection 86.
- the first outward protrusion 86 and the second outward protrusion 87 are formed by an annular protrusion or a plurality of dispersed protrusions.
- the outer diameter of the first outward projection 86 is set to be larger than the outer diameter of the second outward projection 87, whereby the small-diameter rear portion 82 (insertion portion) can be smoothly and easily inserted into the tubular portion 93. Can do. (See Figure 29)
- Knock member The knock member 9 includes a clip 91 extending in the front-rear direction, a clip base 92 (protruding portion) integrally provided at the rear portion of the clip 91, and a bottomed tube integrally provided with the clip base 92. And is formed from a synthetic resin.
- a ball portion 91 a is integrally projected on the inner surface of the clip 91.
- the clip base portion 92 is integrally connected to a plate-like first connecting wall portion 92a extending in the front-rear direction and a rear end of the first connecting wall portion 92a, and extends in a direction perpendicular to the axis. 2 connecting wall portions 92b. Thereby, the durability of the clip base 92 is improved.
- the ball portion 91a of the lip 91 is formed in a plate shape extending in the front-rear direction, and is engaged with the slide groove 66 on the outer surface of the rear shaft 6 so as to be movable in the front-rear direction. (See FIGS. 31 and 33)
- the clip base 92 can be inserted into the slide hole 64.
- the knock member 9 When the knock member 9 is pushed forward when changing from the pen tip immersion state to the pen tip protruding state, the first connection wall portion 92a is inserted into the narrow front hole 64a of the slide hole 64, and the second connection The wall portion 92 b is inserted into the wide rear hole 64 b of the slide hole 64.
- One guide protrusion 93 a is integrally formed on the outer surface of the main body 93 on the opposite side to the clip base 92 in the radial direction.
- a first inward projection 93 c is formed on the inner surface of the main body 93.
- a second inward projection 93d is formed on the inner surface of the cylindrical portion 93 behind the first inward projection 93c.
- the first inward projection 93c and the second inward projection 93d are formed by an annular projection or a plurality of dispersed projections.
- the inner diameter of the first inward projection 93c is set to be larger than the inner diameter of the second inward projection 93d, whereby the small-diameter rear portion 82 (insertion portion) can be smoothly and easily inserted into the cylindrical portion 93. . (See Figure 29)
- a friction portion 12 made of an elastic material is attached to the rear end surface of the main body portion 93 of the knock member 9.
- a rod-like protrusion 97 projecting rearward is formed on the rear end surface of the main body 93 of the knock member 9.
- An annular outward projection is formed on the outer surface of the rod-shaped protrusion 97.
- the friction part 12 made of a cylindrical elastic material is attached to the outer surface of the rod-shaped protrusion 97 by press-fitting.
- the annular outward protrusion on the outer surface of the rod-shaped protrusion 97 gets over and locked with the annular inward protrusion on the inner surface of the friction portion 12, and the friction portion 12 is engaged during the friction operation. Can be prevented from falling off from the rod-shaped protrusion 97.
- the rear end of the rod-shaped protrusion 97 is positioned in front of the rear end surface of the friction portion 12. That is, the rear end of the rod-shaped protrusion 97 does not protrude rearward from the rear end surface of the friction part 12.
- the knock member 9 when the knock member 9 is moved in and out, the finger does not contact the rod-shaped protrusion 97, and a stable contact without sliding between the finger and the rear end surface of the friction portion 12 is possible.
- the attachment structure of a friction part is not restricted to this.
- a small-diameter rear portion 82 (insertion portion) of the cam member 8 is inserted into the main body portion 93 of the knock member 9, and the inner surface of the main body portion 93 and the outer surface of the small-diameter rear portion 82 are connected by fitting.
- the first inward projection 93c on the inner surface of the main body portion 93 and the first outward projection 86 of the outer surface of the small diameter rear portion 82 are overcome and locked.
- the guide protrusion 93a of the knock member 9 is engaged with a guide groove 65 on the inner surface of the rear end opening of the rear shaft 6 and a cam groove 62 communicating with the guide groove 65 in the front-rear direction so as to be movable in the front-rear direction.
- the guide projection 93a is engaged with the guide groove 65.
- the knock member 9 is lowered by gravity and the guide projection 93a is engaged with the cam groove 62.
- the engaging protrusion 84 of the cam member 8 is locked to the locking wall portion 63 at the rear end of the cam groove 62, and the protrusion 75 of the rotating member 7 is engaged to the cam groove 62.
- the cam slope 76 at the rear end of the protrusion 75 of the rotating member 7 is in contact with the cam protrusion 83.
- the cursive body 3 is always urged backward by the bullet 10.
- the writing body 3 can be exchanged.
- the intermediate shaft 5 and the rear shaft 6 are detachably attached by screwing, the cursive body 3 can be exchanged.
- the knock type writing instrument 1 rotates the knock member 9 with respect to the shaft tube 2 to bring the guide protrusion 93a and the guide groove 65 into an engaged state when the pen tip is moved in and out.
- the knock member 9 is moved in the front-rear direction in this state, the clip base 92 moves in the front-rear direction in the slide hole 64 and the guide protrusion 93a moves in the front-rear direction in the guide groove 65.
- the guide projection 93a is pressed against the circumferential inner surface of the shaft cylinder when the guide projection 93a and the guide groove 65 are disengaged, or the guide projection 93a is the shaft cylinder.
- the clip base (projection) 92 can be reliably maintained in the circumferential direction away from the slide hole 64.
- the guide protrusion 93a can be more easily engaged with the recessed portion 67.
- an injection molding gate portion can be positioned on the inner surface of the recess portion 67.
- a configuration may be adopted in which the knock member bullet member 11 is disposed between the rotating member 7 and the cam member 8 (see FIG. 33).
- the resilience of the knock member bullet 11 is set to be smaller than that of the bullet 10.
- the front end portion of the knock member bullet 11 is locked to the locking portion 77 on the inner surface of the rotating member 7, and the rear end portion of the knock member bullet 11 is the locking portion 81 b on the inner surface of the cam member 8. It is locked to.
- the knock member 9 is always urged rearward, and the clip base 92 (protrusion) of the knock member 9 is disengaged rearward from the slide hole even in the pen tip protruding state, and the clip base 92 (protrusion) is It is located behind the rear end of the shaft tube 2. Thereby, the knock member 9 can be rotated in any state of the pen tip protruding state and the pen tip immersing state, and the friction operation can be started quickly.
- thermochromic knock type writing instrument is a type in which a knock member at the rear end of the shaft cylinder is pressed forward, and when a friction portion is provided at the rear end of the knock member, when the friction operation is performed using the friction portion, the knock member Moved to the pen-writing side, and there was a possibility that stable friction operation could not be performed (for example, International Publication WO2008 / 105227A1).
- this embodiment can provide a thermochromic knock-type writing instrument that enables a stable friction operation using the friction part at the rear end of the knock member.
Landscapes
- Mechanical Pencils And Projecting And Retracting Systems Therefor, And Multi-System Writing Instruments (AREA)
- Pens And Brushes (AREA)
- Clips For Writing Implements (AREA)
Abstract
Description
さらに、特許文献1には、回り止め手段が、軸筒後端内壁の係止溝とノック部材の外壁の係止突部とからなる構成、または軸筒後端内壁の係止突部とノック部材の外壁の係止溝とからなる構成が開示されている。
前記ノック部材9が、軸筒2の後端部内に挿入可能な本体部93と、該本体部93の外面に径方向外方に突出する突出部92とを備え、
前記軸筒2の後端部の側壁に、前後方向に延設され且つ軸筒2後端より後方に開放されるスライド孔64が形成され、ペン先突出状態において前記突出部92前端部が前記スライド孔64内に挿入され、ペン先没入状態において前記突出部92前端部が前記スライド孔64より後方に位置してなり、
前記軸筒2の後端部の側壁内面に、前後方向に延設され且つ軸筒後端より後方に開放されるガイド溝65が形成され、
前記ノック部材9の本体部93の外面に前記ガイド溝65と周方向に係脱可能なガイド突起93aが形成され、ペン先没入状態においてノック部材9が前記軸筒2に対して回転可能に構成され、
前記ガイド突起93aが前記ガイド溝65に係合された状態で突出部92がスライド孔64内に挿入され前記ノック部材9が前後方向に移動可能であり、
前記ガイド突起93aが前記ガイド溝65との係合状態が解除された状態で前記ノック部材9の突出部92が前記軸筒2の後端に規制され、ノック部材9の前後方向の移動が阻止される。
前記回転部材7と前記カム部材8との間にノック部材用弾発体11を有し、
前記ノック部材用弾発体11の前端部は、前記回転部材7の内面の係止部77に係止され、前記ノック部材用弾発体11の後端部は、前記カム部材8の内面の係止部81bに係止されている。
本発明の第1の実施の形態のノック式筆記具を図面に従って説明する。(図1乃至図15参照)
軸筒2は、前軸4と、前軸4の後端部に連結される中間軸5と、中間軸5の後端部に連結される後軸6とからなる。
出没機構は、回転カム機構を用いたノック式出没機構である。出没機構は、軸筒2内面(後軸6内面)に形成されたカム歯61及びカム溝62と、カム歯61またはカム溝62と係合し且つ筆記体3の後端と当接する回転部材7と、回転部材7及びカム溝62と係合するカム部材8と、カム部材8と連結されるノック部材9と、軸筒2内に収容され且つ筆記体3を後方に付勢する弾発体10(例えば圧縮コイルスプリング)とを備える。本実施形態の出没機構は、ペン先突出操作及びペン先没入操作のいずれもがノック部材9を前方に押圧操作するダブルノック式である。
回転部材7は、合成樹脂製の両端が開口された円筒体である。回転部材7の前端部には環状鍔部71が形成される。回転部材7の環状鍔部71の後方には、大径筒部72が形成される。回転部材7の大径筒部72の後方には、大径筒部72の外径より小さい外径を有する小径筒部73が形成される。回転部材7の前端部の内面には、段部74が形成される。段部74に筆記体3の後端(筆記体3の後端に取り付けられた尾栓33)に当接される。大径筒部72外面(環状鍔部71の後方且つ小径筒部73の前方)には、カム溝62に係合可能な前後方向に延びる複数(例えば4本)の突条75が形成される。突条75の後端には、カム歯61及びカム部材8のカム突起83に当接可能なカム斜面76が形成される。小径筒部73がカム部材8の前端部内面(大径の前部81内面)に遊挿される。
カム部材8は、前端が開口され後端が閉鎖された合成樹脂製の有底円筒体である。カム部材8は、大径の前部81と、前部81の後方に一体に連設され、前部81外径より小さい外径を有する小径の後部82(挿入部)とを備える。カム部材8の前端面(大径の前部81の前端面)には、複数(例えば8個)の鋸刃状(山形状)のカム突起83が円周状に連設される。カム部材8の前端部外面(大径の前部81の前端部外面)には、複数(例えば8個)の係合突起84が円周方向に沿って分散されて形成される。各々の係合突起84は、各々のカム突起83の後方に設けられる。ペン先没入状態において係合突起84が係止壁部63に前後方向に係止される。係合突起84とカム溝62とは、回転方向のあそび量を有する状態で係合される。また、係合突起84とカムガイド溝62aとは、回転方向のあそび量を有する状態で係合される。具体的には、図14に示すとおり、カム溝62の幅寸法S1と係合突起84と幅寸法S2とは、0.19mmの差を有する。同様に、カムガイド溝62aの幅寸法と係合突起84の幅寸法とは、0.19mmの差を有する。この遊び量(S1-S2)は、好ましくは、0.16~0.25mm、さらに好ましくは0.18~0.21mmの範囲に設定される。ただし、この遊び量(0.19mm)は一例であって、その他の任意の値を採用することができる。
ノック部材9は、前後方向に延びるクリップ91と、クリップ91の後部に一体に連設されたクリップ基部92と、クリップ基部92と一体に連設された有底の筒状部93とを備え、合成樹脂から形成される。クリップ91の内面には、玉部91aが一体に突設される。クリップ基部92は、前後方向に延びる板状の第1の連結壁部92aと、第1の連結壁部92aの後端に一体に連設され、軸線に対して垂直方向に延びる板状の第2の連結壁部92bとを備える。それにより、クリップ基部92の耐久性を向上させる。また、クリップ91の玉部91aは、前後方向に延びる板状に形成され、後軸6外面のスライド溝66に前後方向移動可能に係合される。それにより、クリップ91の回転を防止できる。
ペン先没入状態において、カム部材8の係合突起84がカム溝62後端の係止壁部63に係止され、回転部材7の突条75がカム溝62に係合され、回転部材7の突条75の後端のカム斜面76がカム突起83に当接されている。筆記体3は、弾発体10により常時後方に付勢されている。
本発明の第2の実施の形態のノック式筆記具を図面に従って説明する。(図16乃至図19参照)
カム部材8は、前端が開口され後端が閉鎖された合成樹脂製の有底円筒体である。カム部材8は、大径の前部81と、前部81の後方に一体に連設され、前部81外径より小さい外径を有する小径の後部82(挿入部)とを備える。カム部材8の前端面(大径の前部81の前端面)には、複数(例えば8個)の鋸刃状(山形状)のカム突起83が円周状に連設される。カム部材8の前端部外面(大径の前部81の前端部外面)には、複数(例えば8個)の係合突起84が円周方向に沿って分散されて形成される。各々の係合突起84は、各々のカム突起83の後方に設けられる。ペン先没入状態において係合突起84が係止壁部63に前後方向に係止される。係合突起84とカム溝62とは、回転方向のあそび量を有する状態で係合される。また、係合突起84とカムガイド溝62aとは、回転方向のあそび量を有する状態で係合される。具体的には、カム溝62の幅寸法と係合突起84と幅寸法とは、0.19mmの差を有する。同様に、係合突起84の幅寸法とカムガイド溝62aの幅寸法とは、0.19mmの差を有する。この遊び量は、好ましくは、0.16~0.25mm、さらに好ましくは0.18~0.21mmの範囲に設定される。ただし、これは一例であって、この値に限られるものではない。
ノック部材9は、前後方向に延びるクリップ91と、クリップ91の後部に一体に連設されたクリップ基部92と、クリップ基部92と一体に連設された有底の筒状部93とを備え、合成樹脂から形成される。クリップ91の内面には、玉部91aが一体に突設される。クリップ基部92は、前後方向に延びる板状の第1の連結壁部92aと、第1の連結壁部92aの後端に一体に連設され、軸線に対して垂直方向に延びる板状の第2の連結壁部92bとを備える。それにより、クリップ基部92の耐久性を向上させる。また、クリップ91の玉部91aは、前後方向に延びる板状に形成され、後軸6外面のスライド溝66に前後方向移動可能に係合される。それにより、クリップ91の回転を防止できる。
本発明の第3の実施の形態のノック式筆記具を図面に従って説明する。(図20乃至図24参照)
カム部材8は、両端が開口された合成樹脂製の円筒体であり、筒状部89を備える。カム部材8の前端面には、複数(例えば8個)の鋸刃状(山形状)のカム突起83が円周状に連設される。カム部材8の前端部外面には、複数(例えば8個)の係合突起84が円周方向に沿って分散されて形成される。各々の係合突起84は、各々のカム突起83の後方に設けられる。ペン先没入状態において、係合突起84が係止壁部63に前後方向に係止される。係合突起84とカム溝62とは、回転方向のあそび量を有する状態で係合される。また、係合突起84とカムガイド溝62aとは、回転方向のあそび量を有する状態で係合される。具体的には、カム溝62の幅寸法と係合突起84の幅寸法とは、0.19mmの差を有する。同様に、係合突起84の幅寸法とカムガイド溝62aの幅寸法とは、0.19mmの差を有する。この遊び量は、好ましくは、0.16~0.25mm、さらに好ましくは0.18~0.21mmの範囲に設定される。ただし、これは一例であって、この値に限られるものではない。
ノック部材9は、前後方向に延びるクリップ91と、クリップ91の後部に一体に連設されたクリップ基部92と、クリップ基部92と一体に連設された円筒状または円柱状の軸部94と、該軸部94より前方に一体に連設された円筒状または円柱状の挿入部95とを備え、合成樹脂から形成される。クリップ91の内面には、玉部91aが一体に突設される。クリップ基部92は、前後方向に延びる板状の第1の連結壁部92aと、第1の連結壁部92aの後端に一体に連設され、軸線に対して垂直方向に延びる板状の第2の連結壁部92bとを備える。それにより、クリップ基部92の耐久性を向上させる。また、クリップ91の玉部91aは、前後方向に延びる板状に形成され、後軸6外面のスライド溝66に前後方向移動可能に係合される。それにより、クリップ91の回転を防止できる。
軸部94と挿入部95との間には、当接段部96が形成され、筒状部89内面と挿入部95外面との連結後、当接段部95とカム部材8の後端が当接される。
本発明の第4の実施の形態のノック式筆記具を図面に従って説明する。(図24乃至図27参照)
カム部材8は、両端が開口された合成樹脂製の円筒体であり、筒状部89を備える。カム部材8の前端面には、複数(例えば8個)の鋸刃状(山形状)のカム突起83が円周状に連設される。カム部材8の前端部外面には、複数(例えば8個)の係合突起84が円周方向に沿って分散されて形成される。各々の係合突起84は、各々のカム突起83の後方に設けられる。ペン先没入状態において係合突起84が係止壁部63に前後方向に係止される。係合突起84とカム溝62とは、回転方向のあそび量を有する状態で係合される。また、係合突起84とカムガイド溝62aとは、回転方向のあそび量を有する状態で係合される。具体的には、カム溝62の幅寸法と係合突起84と幅寸法とは、0.19mmの差を有する。同様に、係合突起84の幅寸法とカムガイド溝62aの幅寸法とは、0.19mmの差を有する。この遊び量は、好ましくは、0.16~0.25mm、さらに好ましくは0.18~0.21mmの範囲に設定される。ただし、これは一例であって、この値に限られるものではない。
前記ノック部材9は、前後方向に延びるクリップ91と、クリップ91の後部に一体に連設されたクリップ基部92と、クリップ基部92と一体に連設された円筒状または円柱状の軸部94と、該軸部94より前方に一体に連設された円筒状または円柱状の挿入部95とを備え、合成樹脂から形成される。クリップ91の内面には、玉部91aが一体に突設される。クリップ基部92は、前後方向に延びる板状の第1の連結壁部92aと、第1の連結壁部92aの後端に一体に連設され、軸線に対して垂直方向に延びる板状の第2の連結壁部92bとを備える。それにより、クリップ基部92の耐久性を向上させる。また、クリップ91の玉部91aは、前後方向に延びる板状に形成され、後軸6外面のスライド溝66に前後方向移動可能に係合される。それにより、クリップ91の回転を防止できる。
本発明の第5の実施の形態のノック式筆記具を図面に従って説明する(図28乃至図33参照)。尚、本実施形態におけるカム部材8およびノック部材9の以外の部品(即ち、軸筒2、筆記体3、回転部材7、弾発体10)は、第1の実施の形態と共通である。
筆記体3は、ペン先31と、該ペン先31が開口部に圧入固着されたインキ収容管32と、該インキ収容管32内に充填される熱変色性インキ34と、該熱変色性インキ34の後端に充填され且つ該熱変色性インキ34の消費に伴い前進する追従体35(例えば高粘度流体)とからなる。
軸筒2は、前軸4と、前軸4の後端部に連結される中間軸5と、中間軸5の後端部に連結される後軸6とからなる。
出没機構は、回転カム機構を用いたノック式出没機構である。出没機構は、軸筒2内面(後軸6内面)に形成されたカム歯61及びカム溝62と、カム歯61またはカム溝62と係合し且つ筆記体3の後端と当接する回転部材7と、回転部材7及びカム溝62と係合するカム部材8と、カム部材8と連結されるノック部材9と、軸筒2内に収容され且つ筆記体3を後方に付勢する弾発体10(例えば圧縮コイルスプリング)とを備える。本実施形態の出没機構は、ペン先突出操作及びペン先没入操作のいずれもがノック部材9を前方に押圧操作するダブルノック式である。
回転部材7は、合成樹脂製の両端が開口された円筒体である。回転部材7の前端部には環状鍔部71が形成される。回転部材7の環状鍔部71の後方には、大径筒部72が形成される。回転部材7の大径筒部72の後方には、大径筒部72の外径より小さい外径を有する小径筒部73が形成される。回転部材7の前端部の内面には、段部74が形成される。段部74に筆記体3の後端(筆記体3の後端に取り付けられた尾栓33)に当接される。大径筒部72外面(環状鍔部71の後方且つ小径筒部73の前方)には、カム溝62に係合可能な前後方向に延びる複数(例えば4本)の突条75が形成される。突条75の後端には、カム歯61及びカム部材8のカム突起83に当接可能なカム斜面76が形成される。小径筒部73がカム部材8の前端部内面(大径の前部81内面)に遊挿される。(図11参照)
カム部材8は、前端が開口され後端が閉鎖された合成樹脂製の有底円筒体である。カム部材8は、大径の前部81と、前部81の後方に一体に連設され、前部81外径より小さい外径を有する小径の後部82(挿入部)とを備える。カム部材8の前端面(大径の前部81の前端面)には、複数(例えば8個)の鋸刃状(山形状)のカム突起83が円周状に連設される。カム部材8の前端部外面(大径の前部81の前端部外面)には、複数(例えば8個)の係合突起84が円周方向に沿って分散されて形成される。各々の係合突起84は、各々のカム突起83の後方に設けられる。ペン先没入状態において係合突起84が係止壁部63に前後方向に係止される。係合突起84とカム溝62とは、回転方向のあそび量を有する状態で係合される。また、係合突起84とカムガイド溝62aとは、回転方向のあそび量を有する状態で係合される。(図32参照)
ノック部材9は、前後方向に延びるクリップ91と、クリップ91の後部に一体に連設されたクリップ基部92(突出部)と、クリップ基部92と一体に連設された有底の筒状の本体部93とを備え、合成樹脂から形成される。クリップ91の内面には、玉部91aが一体に突設される。クリップ基部92は、前後方向に延びる板状の第1の連結壁部92aと、第1の連結壁部92aの後端に一体に連設され、軸線に対して垂直方向に延びる板状の第2の連結壁部92bとを備える。それにより、クリップ基部92の耐久性を向上させる。また、リップ91の玉部91aは、前後方向に延びる板状に形成され、後軸6外面のスライド溝66に前後方向移動可能に係合される。(図31、図33参照)
ペン先没入状態において、カム部材8の係合突起84がカム溝62後端の係止壁部63に係止され、回転部材7の突条75がカム溝62に係合され、回転部材7の突条75の後端のカム斜面76がカム突起83に当接されている。筆記体3は、弾発体10により常時後方に付勢されている。
前記実施の形態において、回転部材7とカム部材8との間にノック部材用弾発体11を配置する構成を採用してもよい(図33参照)。前記ノック部材用弾発体11の弾発力は、弾発体10の弾発力より小さく設定される。ノック部材用弾発体11の前端部は、回転部材7の内面の係止部77に係止され、ノック部材用弾発体11の後端部は、カム部材8の内面の係止部81bに係止されている。それにより、ノック部材9が常時後方に付勢され、ペン先突出状態においても、ノック部材9のクリップ基部92(突出部)が、スライド孔から後方に外れ、クリップ基部92(突出部)が、軸筒2後端より後方に位置される。それにより、ペン先突出状態及びペン先没入状態のいずれの状態でも、ノック部材9を回転でき、摩擦操作を迅速に開始できる。
2 軸筒
3 筆記体
31 ペン先
32 インキ収容管
33 尾栓
34 インキ
35 追従体
4 前軸
41 前端孔
42 弾発体保持部
42a 保持壁部
42b 係止段部
5 中間軸
51 グリップ部
6 後軸
61 カム歯
62 カム溝
62a カムガイド溝
63 係止壁部
64 スライド孔
64a 前側孔
64b 後側孔
65 ガイド溝
66 スライド溝
67 窪み部
7 回転部材
71 環状鍔部
72 大径筒部
73 小径筒部
74 段部
75 突条
76 カム斜面
77 弾発体係止部
8 カム部材
81 前部
81a 当接段部
81b 弾発体係止部
82 後部(挿入部)
83 カム突起
84 係合突起
85 凸部
86 第1の外向突起
87 第2の外向突起
88 凹部
89 筒状部
89a 凹部
89b 第1の内向突起
89c 第2の内向突起
89d 凸部
9 ノック部材
91 クリップ
91a 玉部
92 クリップ基部
92a 第1の連結壁部
92b 第2の連結壁部
93 筒状部(本体部)
93a ガイド突起
93b 凹部
93c 第1の内向突起
93d 第2の内向突起
93e 凸部
94 軸部
95 挿入部
95a 凸部
95b 第1の外向突起
95c 第2の外向突起
95d 凹部
96 当接段部
97 棒状突部
10 弾発体
11 ノック部材用弾発体
12 摩擦部
Claims (19)
- 軸筒と、
前記軸筒内に前後方向に移動可能に収容された筆記体と、
前記軸筒の後端部に設けられ且つクリップを有するノック部材と、
前記ノック部材を前方に押圧することにより前記筆記体のペン先を軸筒前端より出没自在にする出没機構と、を備え、
前記出没機構が、
前記軸筒内面に形成され、円周方向に沿って交互に配置された前後方向に延びる複数のカム歯及びカム溝と、
前記筆記体の後方に回転可能に配置され、前記カム歯または前記カム溝に交互に係合可能な複数の突条を有する回転部材と、
前記ノック部材に連結され、前記回転部材を回動させる複数のカム突起を有するとともに前記軸筒内面のカム溝に前後動自在に係合される複数の係合突起を有するカム部材と、
前記筆記体を後方に付勢する弾発体と、を備えたノック式筆記具であって、
前記ノック部材と前記カム部材とが回り止め係合されてなるノック式筆記具。 - 前記ノック部材が、前記軸筒の後端開口部内に挿入される筒状部を備え、前記カム部材が、前記筒状部の内部に挿入される挿入部を備え、前記筒状部の内壁と前記挿入部の外壁とが回り止め係合されてなる請求項1に記載のノック式筆記具。
- 前記筒状部の内面に前後方向に延びる複数の凹部が形成され、前記挿入部の外面に、前記凹部に係合可能な複数の凸部が形成され、前記凹部と前記凸部との係合により前記ノック部材と前記カム部材とが回り止め係合されてなる請求項2に記載のノック式筆記具。
- 前記カム溝と前記係合突起との回転方向のあそび量が、前記凹部と前記凸部との回転方向のあそび量より大きく設定される請求項3に記載のノック式筆記具。
- ペン先没入状態において前記係合突起を前後方向に係止する係止壁部が、前記カム溝の後端に形成され、前記軸筒内面の前記カム溝の後方に、前記カム溝に連通する前後方向に延びるガイド溝が形成され、前記ノック部材の筒状部の外面にガイド突起が形成され、ペン先没入状態において前記ガイド突起が前記ガイド溝に係合され、ペン先突出状態において前記ガイド突起が前記カム溝に係合される請求項1乃至4の何れかに記載のノック式筆記具。
- 前記ノック部材が、前記クリップと、前記クリップの後部に一体に連設されたクリップ基部と、前記クリップ基部と一体に連設された筒状部とを備え、前記軸筒の後端部の側壁に、前後方向に延設され且つ軸筒後端より後方に開放されるスライド孔が形成され、ペン先突出状態において前記クリップ基部前端部が前記スライド孔内に挿入され、ペン先没入状態において前記クリップ基部前端部が前記スライド孔より後方に位置してなる請求項1乃至5の何れかに記載のノック式筆記具。
- 前記筒状部の内面に前後方向に延びる複数の凸部が形成され、前記挿入部の外面に、前記凸部に係合可能な複数の凹部が形成され、前記凸部と前記凹部との係合により前記ノック部材と前記カム部材とが回り止め係合されてなる請求項2に記載のノック式筆記具。
- 前記カム溝と前記係合突起との回転方向のあそび量が、前記凸部と前記凹部との回転方向のあそび量より大きく設定される請求項7に記載のノック式筆記具。
- ペン先没入状態において前記係合突起を前後方向に係止する係止壁部が、前記カム溝の後端に形成され、前記軸筒内面の前記カム溝の後方に、前記カム溝に連通する前後方向に延びるガイド溝が形成され、前記ノック部材の筒状部の外面にガイド突起が形成され、ペン先没入状態において前記ガイド突起が前記ガイド溝に係合され、ペン先突出状態において前記ガイド突起が前記カム溝に係合される請求項7または8の何れかに記載のノック式筆記具。
- 前記ノック部材が、前記クリップと、前記クリップの後部に一体に連設されたクリップ基部と、前記クリップ基部と一体に連設された前記筒状部とを備え、前記軸筒の後端部の側壁に、前後方向に延設され且つ軸筒後端より後方に開放されるスライド孔が形成され、ペン先突出状態において前記クリップ基部前端部が前記スライド孔内に挿入され、ペン先没入状態において前記クリップ基部前端部が前記スライド孔より後方に位置してなる請求項7乃至9の何れかに記載のノック式筆記具。
- 前記カム部材が筒状部を備え、前記ノック部材が前記カム部材の筒状部内に挿入される挿入部を備え、前記筒状部の内壁と前記挿入部の外壁とが回り止め係合されてなる請求項1に記載のノック式筆記具。
- 前記筒状部の内面に前後方向に延びる複数の凹部が形成され、前記挿入部の外面に、前記凹部に係合可能な複数の凸部が形成され、前記凹部と前記凸部との係合により前記ノック部材と前記カム部材とが回り止め係合されてなる請求項11に記載のノック式筆記具。
- 前記カム溝と前記係合突起との回転方向のあそび量が、前記凹部と前記凸部との回転方向のあそび量より大きく設定される請求項12に記載のノック式筆記具。
- 前記ノック部材が、前記クリップと、前記クリップの後部に一体に連設されたクリップ基部と、前記クリップ基部と一体に連設された前記挿入部とを備え、前記軸筒の後端部の側壁に、前後方向に延設され且つ軸筒後端より後方に開放されるスライド孔が形成され、ペン先突出状態において前記クリップ基部前端部が前記スライド孔内に挿入され、ペン先没入状態において前記クリップ基部前端部が前記スライド孔より後方に位置してなる請求項11乃至13の何れかに記載のノック式筆記具。
- 前記筒状部の内面に前後方向に延びる複数の凸部が形成され、前記挿入部の外面に、前記凸部に係合可能な複数の凹部が形成され、前記凸部と前記凹部との係合により前記ノック部材と前記カム部材とが回り止め係合されてなる請求項11に記載のノック式筆記具。
- 前記カム溝と前記係合突起との回転方向のあそび量が、前記凸部と前記凹部との回転方向のあそび量より大きく設定される請求項15に記載のノック式筆記具。
- 前記ノック部材が、前記クリップと、前記クリップの後部に一体に連設されたクリップ基部と、前記クリップ基部と一体に連設された前記挿入部とを備え、前記軸筒の後端部の側壁に、前後方向に延設され且つ軸筒後端より後方に開放されるスライド孔が形成され、ペン先突出状態において前記クリップ基部前端部が前記スライド孔内に挿入され、ペン先没入状態において前記クリップ基部前端部が前記スライド孔より後方に位置してなる請求項15または16の何れかに記載のノック式筆記具。
- 軸筒と、
前記軸筒内に前後方向に移動可能に収容された筆記体と、
前記軸筒の後端部に設けられたノック部材と、
前記ノック部材を前方に押圧することにより前記筆記体のペン先を軸筒前端より出没自在にする出没機構と、を備え、
前記出没機構が、
前記軸筒内面に形成され、円周方向に沿って交互に配置された前後方向に延びる複数のカム歯及びカム溝と、
前記筆記体の後方に回転可能に配置され、前記カム歯または前記カム溝に交互に係合可能な複数の突条を有する回転部材と、
前記ノック部材に連結され、前記回転部材を回動させる複数のカム突起を有するとともに前記軸筒内面のカム溝に前後動自在に係合される複数の係合突起を有するカム部材と、
前記筆記体を後方に付勢する弾発体と、を備えたノック式筆記具であって、
前記ノック部材と前記カム部材とが回り止め係合されてなるノック式筆記具。 - 軸筒と、
前記軸筒内に前後方向に移動可能に収容された筆記体と、
前記軸筒の後端部に設けられ且つ外面に径方向外方に突出する突出部を有するノック部材と、
前記ノック部材を前方に押圧することにより前記筆記体のペン先を軸筒前端より出没自在にする出没機構と、を備え、
前記出没機構が、
前記軸筒内面に形成され、円周方向に沿って交互に配置された前後方向に延びる複数のカム歯及びカム溝と、
前記筆記体の後方に回転可能に配置され、前記カム歯または前記カム溝に交互に係合可能な複数の突条を有する回転部材と、
前記ノック部材に連結され、前記回転部材を回動させる複数のカム突起を有するとともに前記軸筒内面のカム溝に前後動自在に係合される複数の係合突起を有するカム部材と、
前記筆記体を後方に付勢する弾発体と、を備えたノック式筆記具であって、
前記ノック部材と前記カム部材とが回り止め係合されてなるノック式筆記具。
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TWI809239B (zh) * | 2019-01-18 | 2023-07-21 | 日商百樂股份有限公司 | 出沒式筆記具 |
CN114103526B (zh) * | 2021-12-20 | 2023-02-03 | 温州市简系文具有限公司 | 一种摁压触发笔 |
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