JP2018192677A - Malfunction prevention function-equipped knock type writing implement - Google Patents

Abstract

To provide a malfunction-preventing function-equipped knock type writing implement preventing a writing tip from being projected from a tip of a barrel even if a knock part is carelessly pushed when a clip is clamped to a fastening object.SOLUTION: A knock stopper 19 is provided on a side surface of a barrel 1 so as to be moved inwardly in the barrel, and a writing body is housed in the barrel so as to be moved forward and backward by knocking a knock part 5. A push-in projection 22 is provided on an outer surface of the knock stopper so as to move the knock stopper inwardly by being pushed by a fastening object. A contact part 24 is provided at a rear end of the knock stopper so as to be projected into an advancing moving locus of the knock part 5 when the knock stopper is moved. The knock part is brought into contact with the contact part to prevent the writing body to be advanced even when the knock part is carelessly pushed.SELECTED DRAWING: Figure 1

Description

  The present invention is a knock-type writing instrument in which the writing body is advanced by knocking operation so that the writing tip comes out from the tip of the shaft tube. The present invention relates to a knock-type writing instrument with a malfunction prevention function that prevents the writing tip from protruding even when the knocking portion is pressed.

  Knock-type writing instruments are widely used in which the knocking part provided at the rear end of the shaft tube is knocked so that the writing tip of a ballpoint pen refill, liquid marker, mechanical pencil or other writing body is projected and retracted from the front end of the shaft tube. . Such a knock-type writing instrument can be carried by retracting the writing tip and holding the clip between the pocket edge or notebook, but if the knocking part is inadvertently pressed, the writing tip protrudes from the tip of the shaft tube. May end up. When such a situation occurs, the pocket or notebook is contaminated with ink or a lead. For this reason, a writing instrument that prevents inadvertent knocking has been proposed (see, for example, Patent Document 1). The device disclosed in Patent Document 1 and the like has a configuration in which a slide piece (safety piece) is provided so as to move in the axial length direction of the shaft cylinder together with the knock portion when the clip is inserted into the edge of the pocket. Then, when the writing instrument is fixed to the pocket, the slide piece is retracted together with the knock portion, and when the knock portion is inadvertently pressed in that state, the slide piece hits the edge of the pocket, It prevents movement.

  However, if the fastening materials such as pockets and notebooks are soft fabric materials, thin materials such as paper, etc., expect sufficient strength to prevent the knocking part from moving. I can't. Therefore, when the knock part is pressed strongly, the edge of the pocket is pushed down by the slide piece or bent, the clip comes off from the pocket, the knock part moves, the refill advances, the pocket etc. Contaminated.

  Also, a concave portion is formed on the side surface of the knock portion, a hook portion corresponding to the concave portion is provided at the rear end of the clip, and when the clip is inserted into a pocket or the like, the hook portion is hooked into the concave portion of the knock portion to thereby A writing instrument that restrains movement has also been proposed (see, for example, Patent Document 2). However, in such a configuration, the amount of movement of the hook portion changes depending on the thickness and strength of the object sandwiched between the clips, the engagement with the recess becomes uncertain, and the action of restraining the knock portion becomes weak or too strong. May damage the clip.

Japanese Utility Model Publication No. 5-17275 (claims for utility model registration, FIGS. 1 and 2) Japanese Patent No. 3664016 (Claims, FIGS. 1 and 2)

  The problem to be solved by the present invention is that in the knock-type writing instrument that causes the writing body to appear and disappear by knocking operation, the knock portion is in a state where the writing instrument is fixed to the pocket or the like with a clip regardless of the strength of the pocket fabric or the thickness of the notebook paper. It is to provide a knocking type writing instrument with a malfunction preventing function that prevents the cursive body from moving forward even if pressed inadvertently.

  According to the present invention, the writing body is housed in the shaft cylinder having the clip so as to be able to advance and retreat, and the writing body is advanced and retracted by knocking the knock portion so that the writing tip protrudes and retracts from the tip of the shaft cylinder. In the writing instrument, a knock topper provided on the side surface of the shaft cylinder so as to be movable inward of the shaft cylinder, and when the clip is sandwiched between the fastening objects, the rear end of the knock topper is pushed inside the shaft cylinder. In the forward movement trajectory of the knocking portion or the member interlocked with the movement of the knocking portion when the rear end of the knocking topper moves inward Provided is a knocking writing instrument with a malfunction prevention function, characterized by comprising a contact portion provided at the rear end of the knock topper so as to protrude, preferably at the tip of the clip, Provided is a knock-type writing instrument with a malfunction prevention function, characterized in that a clip convex portion is provided to press the fastening object in a stretched state to the pushing protrusion of the knock topper when sandwiched between the kimonos. Solved.

  Further, according to the present invention, a long groove in which the pushing protrusion of the knock topper protrudes and protrudes is formed on a side surface of the shaft cylinder, and the knock topper is provided with the anti-lifting piece in contact with the inner edge side of the long groove. There is provided a knocking type writing instrument with a malfunction preventing function provided with a pair of projecting pieces provided in an opposing state so that the portion is located on both sides of the long groove.

  The present invention is configured as described above, and a knock topper is provided on the side surface of the shaft cylinder so as to be movable inward, and a pushing protrusion is provided on the outer surface of the knock topper. Further, a contact portion is provided at the rear end of the knock topper so that when the clip is clamped to the fastening object, it is pushed by the fastening object and moves inward of the shaft tube. When the contact portion moves inward, the contact portion protrudes into a forward movement trajectory of a knock portion or a member interlocking with the movement of the knock portion, for example, a refill, a lead tank or the like. Further, a clip protrusion is provided at the tip of the clip provided on the shaft tube so that when the clip is sandwiched between the fastening objects, the fastening object is pressed against the pushing protrusion of the knock topper in a stretched state. Therefore, when the clip is clamped to the fastening object by this configuration, the push-in projection pushes the knock topper and moves the abutting portion of the rear end of the knock topper to the inside of the shaft tube, and interlocks with the knock portion and the knock portion. The abutting portion is engaged with the member to be moved to prevent the forward movement. At this time, due to the clip convex portion, the fastening object is stretched regardless of the strength and thickness of the fastening object. As a result, it is possible to hold the writing body so that the writing tip does not protrude from the tip of the shaft tube even when the knocking portion is knocked carelessly in a state of being fixed in the pocket or the like.

  A long groove in which the pushing protrusion of the knock topper protrudes and protrudes is formed on the side surface of the shaft cylinder, and if the anti-floating piece that contacts the inner edge side of the long groove is provided on the knock topper, the knock topper is lifted outward from the side surface of the shaft cylinder. It can be prevented and there is no sense of incongruity when writing. If a pair of projecting pieces are provided in the opposed state so as to be positioned on both sides of the long groove as the above-mentioned clip convex part, the fastening object can be securely pushed into the projection and held in a stretched state, and a large load acts on the knock part. Thus, even if the abutting portion is strongly pressed, the knock topper is not bent outward, the movement of the knock topper is prevented, and the advance of the writing body can be stopped reliably.

Sectional drawing of the state which showed one Example of this invention and retracted the writing front-end | tip. Sectional drawing of the state clamped with the clip. The perspective view of the clip which has a cam part on the inner surface. The perspective view of a knock topper. Explanatory drawing of the state which has not pinched anything. Explanatory drawing of the state which clamped the fastening thing with the clip. The sectional view of a part in the state where a fixed cam of a rotation cam type feeding mechanism was formed in the inner surface of a Knox topper main part, and a refill is retreating. FIG. 8 is a partial cross-sectional view of the embodiment shown in FIG. The perspective view of the Knox topper main body which formed the fixed cam in the inner surface. The sectional view of a part of the state where the example which formed the knock topper in the shaft cylinder itself and the refill is retreating is shown. FIG. 11 is a partial cross-sectional view of the embodiment shown in FIG. The perspective view which shows a part of axial cylinder which formed the knock topper. Sectional drawing which shows the Example which applied this invention to the knock type mechanical pencil. Explanatory drawing of the Example which applied this invention to the spring-type clip. The sectional view of a part of the state which shows the example which pivotally attached the knock topper and the refill is retreating. In the Example shown in FIG. 15, partial sectional drawing of the state which clamped the fastening thing with the clip. The perspective view of the state which isolate | separated the rotary knock topper from the axial cylinder.

  Although the present invention can be applied to a liquid marker, a mechanical pencil, and other appropriate objects as a writing body, FIG. 1 shows an embodiment of the present invention having a ballpoint pen refill as a writing body. In FIG. 1, a refill 2 is accommodated in a shaft cylinder 1 so as to be able to move forward and backward (possibly movable back and forth), and is urged rearward by a spring 3 and upward in FIG. A clip 4 is provided at the rear portion of the shaft tube 1, and the refill 2 is moved forward in the longitudinal direction by the knock of the knock portion 5, and when it is moved downward in FIG. 1, the writing tip 6 is opened from the opening portion 8 of the taper member 7. Protrusively and held in writing position. When retracted from the advanced position and returned to the retracted position shown in FIG. 1, the tip of the refill 2 is immersed in the opening 8 of the taper member 7 and stored in the shaft tube 1.

  As a mechanism for feeding out a writing body such as a refill by knocking at the knocking portion 5, various conventionally known mechanisms can be adopted. In the embodiment shown in FIG. The mechanism is shown. Since it is a well-known mechanism, detailed illustration is omitted, but as is well known, the knock portion 5 of the rotary cam type feeding mechanism is inclined so as to alternately form deep grooves and shallow grooves that open in the axial direction and guide the grooves. A fixed cam 9 having a projecting piece provided at the front end and an inclined surface that engages with an inclined surface at the front end of the fixed cam 9 at the rear end and protrudes so as to alternately enter the deep groove and the shallow groove on the outer periphery. A rotary cam 10 having a piece and a knock cam 11 having an inclined surface that is guided by a long groove of the fixed cam 9 to move back and forth to rotate the rotary cam 10 are provided. A flange 12 is provided at the front end of the rotary cam 10. The refill 2 is formed so that the rear end thereof is in contact with the rotating cam 10 and constitutes a member that moves in conjunction with the movement of the knock portion 5 in the present invention.

  In the embodiment shown in FIG. 1, the clip 4 has a clip cylinder 13 inserted and fixed at the rear end of the shaft cylinder 1, and the fixed cam 9 is formed on the inner surface of the rear portion of the clip cylinder 13. A clip piece 14 extending along the outer periphery of the shaft cylinder 1 is formed on the outside of the clip cylinder 13, and a clip convex portion 15 protruding inward is provided at the tip of the clip piece 14. Usually, the entire clip is formed of a plastic material, and the clip protrusion 15 is integrally formed in a state in which a pair of protruding pieces 16 are provided facing each other. The clip piece 14 may be formed separately from the clip cylinder 13 with an elastic material such as a metal plate material or a metal wire material, and then combined. In this case, for example, the tip of a metal plate clip piece is folded to form a clip convex portion, and a pair of protruding pieces are formed by providing a notch in the center of the clip convex portion, or a clip piece is formed of a metal wire material. When doing so, a clip projection having a series of a pair of protruding pieces by bending the metal wire material may be provided (not shown).

  A long groove 17 is formed on the side surface of the shaft cylinder 1 corresponding to the clip piece 14, and a clip groove 18 is also formed in the clip cylinder 13 corresponding to the long groove 17, and as shown in FIG. Fifteen projecting pieces 16 are in contact with opposite sides of the outer surface of the long groove 17. A knock topper 19 is provided in the long groove 17 of the shaft cylinder 1 so as to be able to appear and retract. In the embodiment shown in FIG. 1, the knock topper 19 includes a cylindrical knock topper main body 20 inserted into the shaft cylinder 1, a cantilevered state extending rearward from the rear end of the knock topper main body 20, and the tip is slightly elastic. The plate-like elastic piece 21 is inclined to the outside, and a pushing protrusion 22 is formed in the middle portion of the elastic piece 21 so as to gradually protrude along the axial direction so as to protrude from the long groove 17. It is. The rear portion of the elastic piece 21 is formed with a wide receiving piece 23 that can be inserted into the clip groove 18 formed in the clip 4 and has a load resistance against an axial load, and the rear end of the receiving piece 23 is A contact portion 24 is formed. Further, on the back side of the intermediate portion of the elastic piece 21, a floating prevention piece 25 that engages with the inner edge portion of the long groove 17 is provided, and the receiving piece 23 side of the elastic piece 21 is outside by the elastic force of the elastic piece 21. The elastic piece 21 is prevented from being lifted outwardly from the position because it is in contact with the long groove 17 even if it is inclined in the direction.

  In the embodiment, the contact portion 24 of the elastic piece 21 of the knock topper 19 stands by at a position close to the rotating cam 10 of the knock portion 5 when the refill 2 is in the retracted position. An appropriate annular locking projection (not shown) is provided on the outer periphery of the refill 2 which is a member interlocking with the knocking portion so that the abutting portion waits close to the locking projection. Also good. When the clip 4 is not used, since the outward elastic force is applied to the elastic piece 21, the contact portion 24 is urged outward, and the movement locus when the knock portion 5 moves forward. Since it does not protrude inward, it does not hinder the feeding operation by a normal knocking operation. When the pushing protrusion 22 is pushed by the fastening object 26, the contact portion 24 of the elastic piece 21 moves inward of the shaft tube, and the corresponding contact portion 24 projects into the forward movement locus of the knock portion 5. .

  With the above configuration, when the clip 4 is clamped to the fastening object 26 such as a pocket or a notebook, the fastening object 26 hits the pushing protrusion 22 and the knock topper 19 is pushed inward, and the elastic piece 21 of the knock topper 19 is made of a shaft cylinder. The contact portion 24 protrudes into the movement locus of the rotary cam 10 and is in a position where it can be engaged with the flange 12 of the rotary cam 10 and the locking protrusion of the refill (not shown). Moving. Therefore, when the knock portion 5 is inadvertently pressed, the rotating cam 10 hits the contact portion 24 to prevent the knock portion 5 from moving forward, and the writing tip 6 of the refill 2 protrudes from the tip of the shaft tube 1. You can avoid it. Further, even if the fastening object 26 is a thin cloth or paper having a low strength, the pair of projecting pieces 16 constituting the clip convex portion 15 are elastically in contact with both sides of the long groove 17 as shown in FIG. The kimono 26 is in contact with the push-in protrusion 22 in a stretched state, and even if the knock portion 5 is strongly pressed, it does not swell or loosen, and can reliably prevent the knock portion 5 from moving forward.

  In the above embodiment, the fixed cam 9 is provided in the cylindrical clip cylinder 13 of the clip 4, but the fixed cam 9 can also be provided on a member on the shaft cylinder side, for example, on the member side constituting the knock topper. Referring to FIGS. 7 to 9, the knock topper 19 has a tubular knock topper body 27 so that the entire length is inscribed in the shaft tube 1, and the fixed cam 9 is provided on the inner surface of the rear part of the knock topper body 27. It is. A substantially U-shaped cut 28 is formed on the wall surface of the knock topper body 27, and a portion defined by forming the cut 28 is an elastic piece 29. A pressing protrusion 30 is provided on the outer surface of the elastic piece 29, and a contact portion 31 is provided at the rear end.

  With the above configuration, as shown in FIG. 7, when the clip 4 is not clamped to the fastening object 26, the operation of the knock portion 5 is free, but when the clip 4 is clamped to the fastening object 26, As shown in FIG. 8, the contact portion 31 of the elastic piece 29 moves to a position in contact with the rotary cam 10 in the forward movement trajectory of the knock portion 5, and can restrain the forward movement of the knock portion 5.

  The knock topper 19 can also be formed on the shaft cylinder 1 itself. With reference to FIGS. 10 to 12, a substantially U-shaped cut 32 is formed on the wall surface of the cylindrical shaft cylinder 1, and a portion defined by forming the cut 32 is used as an elastic piece 33. A contact portion 34 is provided at the rear end of the elastic piece 33, and a push-in projection 35 is provided at the intermediate portion.

  With the above configuration, as shown in FIG. 10, when the clip 4 is not clamped to the fastening object 26, the operation of the knock portion 5 is free, but when the clip 4 is clamped to the fastening object 26, 11, the abutting portion 34 of the elastic piece 33 moves to a position in contact with the rotating cam 10 in the forward movement trajectory of the knock portion 5, and can restrain the forward movement of the knock portion 5.

  Although each said Example demonstrated the case where a cursive body was a ball-point pen refill, this invention can also be applied to a knock type mechanical pencil as a cursive body. FIG. 13 shows a knock-type mechanical pencil 36. A core tank 39 having a core chuck 37 and a clutch 38 at the tip is housed in the shaft cylinder 1, and is urged upward in FIG. Yes. A cap 42 surrounding the eraser 41 is provided as a knock portion 5 at the rear portion of the lead tank 39, and a tail plug with a clip is fitted to the rear end of the shaft tube 1. Therefore, in the present invention, the core tank 39 constitutes a member that interlocks with the movement of the knock portion.

  An annular locking projection 43 is provided on the outer periphery of the rear portion of the core tank 39. Further, the shaft tube is provided with a knock topper 19 similar to that of the embodiment of FIG. 1, and a pushing protrusion 22 formed on the outer surface of the elastic piece 21 of the knock topper 19 projects from the long groove 17 of the shaft tube 1. The contact portion 24 provided at the rear end of the elastic piece 21 of the knock topper 19 is close to a locking projection 43 provided on the outer periphery of the core tank 39 as shown in FIG. The abutment portion 24 is located within the movement trajectory when the core tank 39 advances when the elastic piece 21 of the knock topper 19 is moved inward by the fastening object 26, specifically, the engagement protrusion 43. When it enters into the movement locus and the knock part 5 is knocked carelessly, the movement is blocked. Therefore, the lead tank 39 does not move forward and the lead is not drawn out from the tip of the shaft tube to contaminate the pocket or the like.

  In each of the above embodiments, the clip piece 14 of the clip 4 is formed integrally with the clip cylinder 13 and is clamped to the fastening object 26 by the elastic action of the clip piece 14 itself. In this manner, the clip piece 44 may be pivotally attached 45 to the outside of the clip cylinder 43 and may be a spring-type clip that is clamped by a spring 46 in a binder manner.

  In each of the above embodiments, the cantilever elastic piece 21 having one end connected to the knock topper body 20 is pushed inward by the pushing projection 22 and is swung to move the contact portion 24. It is also possible to pivot the Knox topper to move the contact part. FIGS. 15 to 17 show an embodiment of the rotary knock topper 47. In the long groove 48 provided in the shaft tube 1, support shafts 49 are provided on both sides of the long groove 48, and one end side is provided with a rotation stop. A stopper 50 is provided. The knock topper 47 has a rotating piece 52 having a shaft hole 51 that is rotatably fitted to the support shaft 49 opened on the lower surface of the intermediate portion, and a pushing protrusion 53 is formed on the outer surface of the rotating piece 52. A contact portion 54 is provided at the end. The length between the front end of the rotating piece 52 and the shaft hole is shorter than the distance between the rear end of the rotating piece and the shaft hole, and the clip 4 is not sandwiched between the fastening objects 26. The front end of the rotating piece 52 extends to a position corresponding to the rotation stop stopper 50. The clip 4 attached to the rear part of the shaft cylinder 1 has a clip piece 14 and a clip convex part 15 for sandwiching the fastening object 26. When the clip 4 is not sandwiched by the fastening object 26, the clip convex part 15 is The abutting portion 54 of the rotating piece 52 is held so as not to be inclined inwardly when hitting the front portion of the rotating piece 52 (FIG. 15). When the fastening object 26 is sandwiched, the clip convex portion 15 is separated from the front portion of the rotating piece 52 and the pushing protrusion 53 is pushed, so that the rotating piece 52 is rotated and the contact portion 54 is inward of the shaft tube. To the forward movement trajectory of the knock portion 5, engages with the rotating cam 10 (FIG. 16), and keeps the refill from being advanced even if the knock portion is inadvertently pushed.

  In addition, a protruding shaft is provided on the rotating piece side, a shaft hole is provided on the shaft cylinder side, the rotating piece is rotatably connected, or a convex portion is provided on the outer surface of the shaft cylinder, and an insertion hole is provided in the convex portion and the rotating piece. The rotating piece may be rotatably provided by forming and inserting the rotating shaft in communication.

DESCRIPTION OF SYMBOLS 1 Shaft cylinder 2 Refill 4 Clip 5 Knock part 9 Fixed cam 10 Rotating cam 11 Knock cam 14 Clip piece 15 Clip convex part 16 Projection piece 19 Knock topper 21, 29, 33 Elastic piece 22, 30, 35, 53 Pushing protrusion 23 Receiving piece 24, 31, 34, 54 Abutting portion 25 Floating prevention piece 26 Fastening 39 Core tank 47 Rotating knock topper 52 Rotating piece

Claims (6)

  In a knock type writing instrument in which a writing body is housed in a shaft cylinder having a clip so as to be able to advance and retreat, and the writing body is advanced and retracted by knocking a knock portion so that the writing tip protrudes and retracts from the tip of the shaft cylinder. Knock topper provided on the side so as to be movable inward of the shaft tube, and knocking so that the rear end of the knock topper is moved inward of the shaft tube by being pushed by the fastening material when the clip is sandwiched between the fastening materials A push-in projection formed on the outer surface of the stopper, and the knock topper so as to project into the forward movement trajectory of the knock portion or a member interlocked with the movement of the knock portion when the rear end of the knock topper moves inward. A knock-type writing instrument with a malfunction prevention function, comprising a contact portion provided at a rear end of the knocking-type writing instrument.   The side surface of the shaft cylinder is provided with a long groove in which the pushing protrusion of the knock topper is projected and retracted, and a clip convex portion is provided at the tip of the clip so as to press the fastening object against the pushing protrusion in a stretched state. The knock type writing instrument with a malfunction prevention function according to claim 1.   The knock-type writing instrument with a malfunction preventing function according to claim 2, wherein the clip convex portion includes a pair of projecting pieces positioned opposite to both sides of the long groove.   The knock type writing instrument with a malfunction prevention function according to claim 2 or 3, wherein the knock topper is provided with a floating prevention piece in contact with the inner edge side of the long groove.   The Knox topper has a cylindrical Knox topper body and an elastic piece extending from the rear end of the Knox topper body and having an indentation protrusion formed on the outer surface, and the elastic piece has a distal end elastically inclined outward and a rear end. The knock type writing instrument with a malfunction prevention function according to any one of claims 1 to 4, wherein is a contact portion.   The Knox topper has a rotating piece pivotally attached to the shaft cylinder, a pushing projection is formed on the outer surface of the rotating piece, a contact part is formed at the rear end, and the front part of the rotating piece is The knock type writing instrument with a malfunction prevention function according to claim 1, which faces a rotation stopper provided on the shaft cylinder.

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