JP2020055139A - Rod-shaped feeding device - Google Patents

Abstract

To provide a rod-shaped feeding device including a barrel having an incompletely circular cross section capable of performing rotational action of a lead in a posture in writing at arbitrary timing of the user without causing malfunction.SOLUTION: A rod-shaped feeding device having a barrel 4 of a cross section formed in an incompletely circular shape includes in an inside of the barrel, a lead feeding mechanism 20 having a chuck 11 for holding a lead 14, a sliding cam 21 interlocking with an operation body 7 and including a rear cam 21b, a cylindrical body 13 disposed inside the sliding cam 21, a rotator 22 locked to the cylindrical body 13 so as to be unrotatable and movable forward and backward, and a stopper 23 locked to the operation body 7; the stopper 23 is moved inside the barrel 4 by backward movement of the operation body 7, and thus the cylindrical body 13 is released from retreat limitation, and the rear cam 21b of the sliding cam 21 and a front cam 22b of the rotator 22 are cam-fitted, so that the chuck 11 rotates in one direction together with the rotator 22.SELECTED DRAWING: Figure 2

Description

  TECHNICAL FIELD The present invention relates to a rod-shaped core feeding tool which can feed a rod-shaped core forward by operating an operation body and rotate the core.

  Inside the barrel, a pencil lead, colored pencil, crayon, or a stick-shaped core such as solid glue, lipstick, eyeliner, eyeshadow, or lip balm is housed. A rod-shaped core feeding tool that performs writing or application on paper or the like with the core protruding from an opening is well known.

The above-mentioned rod-shaped core feeding device is used by performing a core feeding operation, operating a core feeding unit disposed in the barrel, and projecting the core from an opening at the tip end of the barrel.
And, since the rod-shaped core feeding tool is to write and apply with the core protruding from the tip of the barrel, if writing or applying is continued, the core will be reduced and the handwriting and the drawing line when applied will be wider than the core diameter. There is a problem that becomes. In particular, when the cross section of the barrel is a non-circular shape such as a rectangle (rectangle), the side face of the barrel becomes planar, so that the surface can be grasped with a finger, so that it can be firmly grasped and a force is applied. On the other hand, there is an advantage that it is hard to slide, but the position where the shaft cylinder is freely gripped cannot be determined by rotating the shaft cylinder, so that the problem of the one-sided reduction of the core acts remarkably.

  As a means for solving the above-mentioned problem of the core eccentricity, for example, in a mechanical pencil, as disclosed in Patent Document 1, a chuck for holding and releasing the core is disposed in a shaft cylinder, By operating the knocking body arranged at the rear or side, a structure is known in which the core can be extended and the core can be rotated, thereby preventing the core from being cut off and broken during writing. I have.

  The mechanical pencil disclosed in Patent Literature 1 moves a lead tank and a slider by pressing a knock member, rotates the rotor by moving the slider, and further rotates the lead tank and the lead tank by rotating the rotor. By rotating the chuck fixed to the shaft, the core can be rotated and fed forward.

  However, in the structure of Patent Literature 1, the push-out operation of the knocking member at an arbitrary timing of the user allows the lead-out and the rotation of the lead to be performed. Since it is at the end or side, if it is at the rear end, it is necessary to operate the knocking body after changing the mechanical pencil when it is necessary to rotate the lead when writing, which is troublesome. In addition, when the knock member is located on the side of the barrel, the knock body can be operated even with the writing posture, but if a finger touches the knock member during writing, contrary to the intention of the user. The core has been rotated or extended. There is a possibility that breakage may occur due to a change in handwriting or an inadvertent projection of the lead against the will of the user. Further, when writing is performed while touching the knock member, the writing is performed in a state where the chuck is opened, and there is a possibility that the core cannot be bored because it cannot withstand the writing pressure.

JP-A-11-048680

  The present invention has been made in view of the above-described problems, and has a non-circular shaft cylinder having a non-circular cross-section that can be performed without erroneous rotation of a core at an arbitrary timing of a user in a posture during writing. It is an object of the present invention to provide a rod-shaped core feeding tool provided with:

The present invention
"1. It has a shaft cylinder having a non-circular cross section in cross section, a chuck for holding a rod-shaped core, a fastener externally fitted to the chuck, and a tubular body for supporting the fastener at the rear. A bar-shaped core feeder, comprising: a core feeding mechanism; and an operating body disposed on a front outer portion of the barrel so as to be movable back and forth, wherein the core is fed forward by sliding the operating body back and forth. And
A sliding cam that slides back and forth in conjunction with the operating body and has a rear cam at a rear portion inside the shaft barrel, and a tubular shape that is disposed inside the sliding cam so as to be movable back and forth. A body, a rotor disposed behind the sliding cam and outside the chuck, and locked to the cylindrical body so as to be non-rotatable and movable back and forth, and locked to the operating body. With a stopper,
The cylindrical body is configured to move back and forth in conjunction with the sliding cam by restricting the backward movement by the stopper and releasing the restriction by the stopper,
By the rearward movement of the operating body, the stopper moves within the shaft cylinder, whereby the retraction restriction of the cylindrical body is released, and the rear cam of the sliding cam and the front cam of the rotor are moved. A rod-shaped core feeder, wherein the rotor is rotated in one direction with respect to the shaft cylinder by cam fitting, and the chuck is rotated in conjunction with the rotation of the rotor.
2. A locking projection is formed on the stopper, the locking projection is locked so as to slide in a sliding groove formed on an inner surface of the operating body, and the locking projection is moved by the rearward movement of the operating body. Is moved in the sliding groove, so that the stopper moves in a direction perpendicular to the axial direction of the barrel, whereby the retraction restriction of the tubular body is released. 2. The rod-shaped core feeding tool according to the above item 1.
3. The said cylindrical body moves to the back by the further movement of the said operation body to the back, and the said core extension mechanism is operated and the said core was comprised so that it might be extended forward, The said 1 or 2 characterized by the above-mentioned. 4. The rod-shaped core feeding device according to item 1.
4. A rear cylinder body detachably mounted on the shaft cylinder is disposed behind the shaft cylinder,
4. The rear cylinder according to any one of claims 1 to 3, further comprising: a core accommodating chamber for accommodating the core, and an accessory accommodating chamber to which at least one accessory can be attached. Item 10. The rod-shaped core feeding tool according to Item 6. ".

  The shaft cylinder having a non-circular cross-section in the present invention includes a rectangular (rectangular) or elliptical cross-section, and in the case of a rectangular shape, approximately rounded (rounded) each corner. It shall include rectangular objects. In the present invention, it is preferable to use a shaft cylinder having a different aspect ratio of the center axis in the cross section, since the gripping position (rotation direction) of the shaft tube is limited, and the effect of the present invention becomes remarkable, which is preferable.

According to the rod-shaped core feeding tool of the present invention, since the operating body is disposed on the outer front portion of the barrel, the chuck can be moved by moving the operating body at an arbitrary timing without switching while holding the writing state. And the core held by the chuck can be rotated. In addition, the operation is performed by moving the operating body backward with respect to the barrel, while the hand holding the barrel at the time of writing is applied to the hand to apply writing pressure to the writing tip side. A force is applied to the side. For this reason, even if a finger touches the operating body during writing, the operating body hardly exerts a rearward force, and the operating body does not move backward. The rotation of the core can be prevented. Further, the operating tool may be configured not to move forward during writing, so that the operating tool supports the finger during writing.
In addition, by restricting the retraction of the tubular body by the stopper locked to the operating body, when a load is applied to the chuck rearward through the core by writing pressure during writing, the tubular body retreats the chuck. Is supported, so that retraction of the lead can be prevented within a range not exceeding the holding force of the lead by the chuck.

In addition, the backward movement of the operating body (the first stage of retreating of the operating body) causes the stopper to move within the shaft cylinder, thereby switching whether or not the cylindrical body can be retracted, and the chuck together with the rotor with respect to the shaft cylinder. By rotating the lead in one direction, the lead held by the chuck can be rotated. Therefore, even if the lead is partially reduced by writing, the lead can be rotated at an arbitrary timing of the user. For this reason, it is possible to prevent handwriting and drawing lines during writing from becoming thicker than the core diameter.
In particular, since the rod-shaped core feeding tool of the present invention has a non-circular cross section of the barrel, it is difficult to rotate the barrel at the time of writing. . For this reason, the structure of the present invention in which the user can rotate the core by a fixed amount at an arbitrary timing greatly improves the convenience. Note that when a shaft tube having a rectangular cross section, which is difficult to rotate while holding the shaft tube at the time of writing, is used, the above-described effect is remarkably exerted.

The rotation angle at which the lead rotates by one retreat of the operating body changes depending on the shape and size of the rear cam of the sliding cam and the front cam of the rotor. It is possible to arbitrarily determine whether or not to make the setting.
In the present invention, when the angle of rotation at one time is small, the effect of eliminating the eccentricity of the core is small, and when the angle of rotation is too large, writing at the edge of the core may occur, and the core may be chipped. The angle of rotation at which the lead rotates by retracting the operating body once is preferably 30 ° or more and 180 ° or less, more preferably 60 ° or more and 150 ° or less, because it is easily broken.

  As means for restricting the retraction of the tubular body by the stopper according to the present invention, a locking projection formed on the stopper is locked so as to slide in a sliding groove formed on the inner surface of the operating body, The stopper is moved in the direction perpendicular to the axial direction of the shaft cylinder as the locking protrusion moves in the sliding groove due to the rearward movement of the cylinder, so that the retraction restriction of the cylindrical body is released. In this case, in this case, since the stopper that restricts the retraction of the cylindrical body is not released unless the operating body is moved backward, when writing pressure is applied during writing, the chuck and the fastener are supported by the cylindrical body, Since the holding force of the lead by the chuck is ensured, the lead can be prevented from retreating.

  Further, by further moving the operating body backward (the second stage of retreat), the sliding cam and the tubular body move backward in conjunction with each other, and the lead-out mechanism is operated to draw the lead forward. In this case, by stopping the rearward movement of the operation body at the first stage, only the rotation operation can be performed without extending the lead. For this reason, the core is not unnecessarily extended during rotation of the core, and the core does not excessively protrude from the rod-shaped core extending tool, so that breakage of the core can be prevented.

Further, in the present invention, the operating body is disposed on the outer front portion of the shaft cylinder, the sliding cam and the stopper are formed so as to move in conjunction with the operating body, and a center feeding mechanism is provided inside the sliding cam. Is arranged, and the rotor is arranged behind the sliding cam. Therefore, most of the necessary structures are concentrated on the front portion of the barrel. For this reason, it is sufficient that at least a refill accommodation portion is formed in the rear cylinder body to be mounted at the rear part of the shaft cylinder, and other spaces can be used freely. Furthermore, in the present invention, since the cross-section uses a non-circular shaft cylinder, when the rear cylinder is formed to have substantially the same shape as the shaft cylinder, various empty spaces are formed in the rear cylinder. An accessory storage room to which accessories can be attached may be provided.
The accessories to be attached to the accessory storage chamber of the rear cylinder described above are not particularly limited, and the number and shape of the accessories that can be attached can be freely set. When the output tool is used as a writing instrument such as a mechanical pencil or a colored pencil feeder, a general eraser with a rectangular cross section may be attached to the accessory mounting part, and a refill case containing a large number of refills is used. It may be configured so that it can be attached directly, it may be configured so that another writing instrument such as a marker or a ballpoint pen can be installed, and it may be configured so that stationery such as correction tape, folding scissors, sticky notes, etc. can be attached. Good. Further, when the stick-shaped core feeding device of the present invention is used as a feeding device for makeup capable of feeding a rod-shaped core such as lipstick, eyeliner, and eye shadow, a lip brush or a lip brush that assists finishing at the time of makeup in an accessory mounting portion. You may comprise so that a makeup chip etc. can be mounted or stored. Furthermore, as another, by storing the battery in the accessory mounting room, the rear cylinder is configured to have functions of a night-vision light, an alarm buzzer, a clock, a pedometer, a portable charger, and the like. Is also good.

  According to the present invention, it is possible to provide a rod-shaped core feeding tool provided with a shaft cylinder having a non-circular cross-section, which can be performed without any malfunction of the rotation of the core at a user's arbitrary timing in a posture during writing. did it.

FIG. 3 is a side view of the rod-shaped core feeding tool of the first embodiment. It is a longitudinal cross-sectional view of the rod-shaped core feeding tool of FIG. FIG. 3 is an enlarged vertical cross-sectional view showing an enlarged main part of the rod-shaped core feeding tool of FIG. 2. It is an expanded sectional view in the ZZ line of FIG. It is the exploded view which disassembled the main part in a shaft cylinder. (Displayed without partial disassembly) FIG. 3 is an enlarged vertical cross-sectional view illustrating a main part in a state where the operating tool is retracted from the state of FIG. 2 (first-stage retreat operation). FIG. 7 is an enlarged vertical cross-sectional view illustrating a main part in a state where the operating body is further retracted from the state of FIG. 6 (second-stage retreat operation). FIG. 8A is a developed view showing the relationship between the rear cam of the shaft cylinder (front cylinder), the rear cam of the sliding cam, and the front cam of the rotor when the operating body is moved rearward. FIG. 8B shows a state in which the operating tool has been moved backward by one step (FIG. 6), and FIG. 8C shows a two-step operating state in which the operating tool has been moved (FIG. 2). FIG. 8D shows a state in which the operating body has been moved back to the original position (FIG. 3). It is a longitudinal section showing modification 1 of the present invention. It is a longitudinal section showing modification 2 of the present invention.

Next, with reference to the drawings, the rod-shaped core feeding tool of the present invention will be described in detail using a mechanical pencil, but the present invention is not limited to the following examples.
Further, in the present embodiment, in the longitudinal direction of the shaft cylinder, the side where the front cylinder is located is expressed as front, and the opposite side is expressed as rear. Further, in the axial direction of the shaft cylinder, the side where the chuck is located is expressed as an inner side, and the opposite side is expressed as an outer side.
Note that, for easy understanding, the same members and the same parts in the drawings are denoted by the same reference numerals.

Example 1
FIG. 1 is a side view of a mechanical pencil 1 (rod-shaped lead-out tool) of Example 1, FIG. 2 is a longitudinal sectional view of FIG. 1, and FIG. 3 is an enlarged longitudinal sectional view of a main part of FIG. FIG. 4 is a cross-sectional view taken along line ZZ in FIG. 2, and FIG. 5 is an exploded view (partially displayed without disassembly) of each component disposed in the barrel. As shown in FIGS. 1 to 4, the mechanical pencil 1 includes a front shaft 2 having a substantially rectangular cross section and a front cylindrical body 3 irremovably fixed to a front portion of the front shaft 2. A shaft cylinder 4 is formed, a rear cylinder 5 having a cross section substantially the same as that of the front shaft 2 is detachably attached to the rear part of the front shaft 2, an eraser 6 is attached to the rear cylinder 5, An operation body 7 is attached to the front outer portion of the front tube 2 so as to be movable back and forth with respect to the front shaft 2 (shaft tube 4), and a front end opening 3a of the front tube body 3 holds a core therein. A front end member 9 having a member 8 is inserted so as to be movable back and forth, and a chuck unit 10 is screwed to a rear portion of the front end member 9.

The front shaft 2 will be described in detail. As shown in FIGS. 3 and 4, the front shaft 2 has a substantially rectangular shape in which each corner in the cross section is rounded (rounded). Are formed at about 1: 2), and an inner hole 2a penetrating along the longitudinal direction is formed. A cutout portion 2b is formed in the front outer portion of the front shaft 2, and is formed so as to extend from an end of the cutout portion 2b in parallel with the inner hole 2a, and has a non-circular cross section. A bottomed front hole 2c is provided. Further, a rear concave portion 2d is formed at the rear of the front shaft 2 from the rear end toward the front.
An inner step 2e and a rear female screw 2f are formed at the rear of the inner hole 2a, and an inner groove 2h (see FIG. 4) is formed at the side surface of the inner hole 2a. A rail projection 2g extending along the longitudinal direction is formed on the inner surface of the front hole 2c.

  More specifically, as shown in FIGS. 3 and 5, the front cylinder 3 is non-removably and non-rotatably engaged with a front portion of the inner hole 2 a of the front shaft 2. The front cylinder 3 is formed in a cylindrical shape, and a rear cam 3b having a cam slope 3c extending in the axial direction and alternately inclined forward and rearward is formed at the rear end.

As shown in FIG. 3, a brass chuck 11 having a head 11a divided into three parts is provided inside the front shaft 2 (shaft cylinder 4). A cylindrical fastener 12 is externally fitted so as to cover the head 11 a of the chuck 11, and a cylindrical tubular body 13 is provided so as to contact the rear part of the fastener 12.
Further, the outer peripheral portion of the head 11a of the chuck 11 is formed in a tapered shape so as to increase in diameter toward the front, and when the fastener 12 is externally fitted to the head 11a, the inside of the head 11a is formed. The peripheral portion is configured to hold the lead 14 for a mechanical pencil. When the fastener 12 is not fitted to the head 11a of the chuck 11, the head 11a is formed so as to be separated from each other and open. In this state, the core 11 is held by the head 11a. Is canceled.

  As shown in FIG. 3, a male screw portion 13 a is formed at a central outer peripheral portion of the cylindrical body 13, and a rear outer peripheral portion of the cylindrical body 13 projects circumferentially outwardly at a rear outer peripheral portion. A step 13b is formed.

  A tubular connecting body 15 is press-fitted to the rear of the chuck 11, and an inner pipe 18 is press-fitted to the rear of the connecting body 15, and a core 14 inserted through a rear inner hole of the inner pipe 18 is inserted therein. The chuck 18 passes through the pipe 15 and the connector 15 and enters the chuck 11.

A tubular middle piece 16 is disposed behind the connecting body 15, and a male screw part 16 a is formed on the outer periphery of the middle piece 16, and the male screw part 16 a and the rear female screw part 2 f of the front shaft 2 are formed. Are screwed to fix the middle piece 16 to the front shaft 2.
Further, a chuck spring 17 is stretched between the inner step 13c of the cylindrical body 13 and the front end of the connecting body 15, and the chuck spring 17 pushes the connecting body 15 and the chuck 11 pressed into the connecting body 15 backward. It has been bounced.

More specifically, as shown in FIGS. 3 to 5, the front end member 9 is formed with an inner hole penetrating in the axial direction of the front end member 9, and has a front end opening 9 a at the front end through which the core 14 is inserted. Is formed. A female screw portion 9b is formed in a rear inner hole of the front end member 9, and the female screw portion 9b and the male screw portion 13a of the tubular body 13 are detachably screwed into the front end member 9 so as to be detached. And the cylindrical body 13 are fixed. A rear outer step portion 9c is formed on the rear outer peripheral portion of the front opening member 9 so as to protrude circumferentially outward. The rear outer step portion 9c further protrudes outward and extends in the axial direction. Four rail portions 9d extending along the axis are formed evenly along the circumference of the shaft. Further, a rear flange 9e is formed at the rear end of the rear outer step 9c so as to protrude circumferentially further outward.
A lead holding member 8 made of nitrile rubber and holding the lead 14 with a light force (about 10 g in this embodiment) is press-fitted and fixed in the front inner hole of the front end member 9.

  Here, the chuck unit 10 is constituted by the chuck 11, the fastener 12, the tubular body 13, the connecting body 15, the chuck spring 17, and the inner pipe 18, and the chuck unit 10, the front end member 9, the core holding member 8, Constitutes the lead-out mechanism 20.

As shown in FIGS. 3 to 5, a cylindrical sliding cam 21 is mounted outside the cylindrical body 13 so as to be movable back and forth. A projecting portion 21a protruding outward is formed on the outer peripheral portion of the sliding cam 21 so that the projecting portion 21a extends in the longitudinal direction on the side surface of the front shaft 2 on the side of the notch 2b. It is inserted into the formed slit. As a result, the sliding cam 21 is locked so as not to rotate with respect to the front shaft 2.
Further, the rear end of the sliding cam 21 is formed with a rear cam 21b having a cam slope 21c extending in the axial circumferential direction and alternately tilting forward and rearward. The respective cam portions are formed such that the rear cam 21b and the rear cam 3b of the front shaft 2 are shifted from each other by about a half phase (about 45 ° in the present embodiment) in the axial direction.
The front end of the sliding cam 21 is in contact with the inner stage of the front cylindrical body 5 so that the sliding cam 21 cannot move forward in the state shown in FIGS.

  The operation body 7 will be described in detail. As described above, the operation body 7 is inserted and mounted from the front hole 2c formed in the front part of the front shaft 2, and inside the operation body 7 along the longitudinal direction. A sliding groove 7a is formed. The sliding groove 7a is formed so as to be continuous with a vertical groove 7a1 extending from the front part of the operating body 7 along the longitudinal direction and a rear part of the vertical groove 7a1, and has an inclined groove 7a2 which is inclined toward the chuck unit 10 side. , Is constituted. Further, the front part of the operating body 7 is formed so as to be curved so as to be depressed rearward, and when operating the operating body 7, the finger is fitted to the front part so that it is difficult to slip.

  A hole-shaped mounting portion 7b is formed on the front side surface of the operating body 7, and the protrusion 21a of the sliding cam 21 is inserted into the mounting portion 7b. A concave rail groove 7c (see FIG. 4) extending along the longitudinal direction is formed on the side surface of the operating body 7, and the rail groove 7c is formed to extend along the axial direction on the inner surface of the front shaft 2. The operating body 7 is locked to the front shaft 2 (shaft tube 4) together with the sliding cam 21 so as to be movable back and forth and non-rotatably by being inserted into the rail projection 2g.

A cylindrical rotor 22 is inserted between the rear end of the sliding cam 21 and the rear flange 9f of the front opening member 9, and the rotor 22 rotates with respect to the front shaft 2. Grooves 22a (see FIG. 4) which are inserted as much as possible and extend along the axial direction are formed on the inner peripheral portion thereof so as to be evenly arranged at four places on the axial periphery. Further, by inserting the rail portion 9d of the leading end member 9 into the groove portion 22a, the rotor 22 cannot be rotated with respect to the leading end member 9 and the cylindrical body 13 to which the leading end member 9 is screwed. And it is locked so that it can move back and forth.
At the front end of the rotor 22, a front cam 22b having a cam slope 22c extending in the circumferential direction of the shaft and alternately inclined forward and backward is formed. 3b and the rear cam 21b of the sliding cam 21 are cam-fitted.

  A collar 19 is inserted behind the rotor 22 so as to contact the rear end of the rotor. A knock spring 24 is stretched between the rear end of the collar 19 and the inner step 2e of the front shaft 2. By being bridged, the rotor 22 is repelled forward with respect to the front shaft 2. A slit 19b is formed on the side surface of the collar 19 to extend rearward from the front end.

As shown in FIG. 3, a notch 2b of the front shaft 2 is formed with a side hole 2i penetrating to the inner hole 2a, and the side hole 2i has a stopper for restricting the retraction of the cylindrical body 13. Is inserted. The side hole 2i is formed so that the plate-like piece 23 slides only in a direction perpendicular to the longitudinal direction of the front shaft 2, and in the state of FIG. The rear end of the tubular body 13 is restricted so as to abut on the rear end of the tubular body 9 together with the front end member 9.
By forming a cylindrical sliding protrusion 23a slidably locked in the sliding groove 7a of the operating body on the side of the plate-like piece 23, the operating body 7 moves back and forth to move the plate. The shape piece 23 slides in a direction orthogonal to the longitudinal direction of the front shaft 2, and the reversibility of the tubular body 13 is switched.

Next, the rear cylinder 5 will be described in detail with reference to FIGS. As described above, the rear cylinder 5 is formed in a rectangular shape having a cross section substantially the same as that of the front shaft 2 (the shaft cylinder 4), and is provided with a small mounting portion 5 a at the front portion and a rear concave portion at the front shaft 2. It is detachably attached to 2d.
An inner hole 5b having a substantially rectangular cross section penetrating in the longitudinal direction is formed in the inside, and a core accommodating chamber 5c for accommodating a refill core is formed at the front of the inner hole 5b, and at the rear thereof. Is formed with an accessory accommodating portion 5d to which an eraser 6 having a rectangular cross section is detachably mounted. Furthermore, the front part of the core accommodating chamber 5c is formed with an inclined portion 5e inclined toward the inner pipe 18 so that the core 14 in the core accommodating chamber 5c is guided into the chuck unit 10 through the inner pipe 18. It is composed. The eraser 6 is housed in the case 6a and mounted.

  In this embodiment, since the accessory accommodating portion 5d is formed in a rectangular shape as described above, a general eraser having a rectangular cross section can be attached. For this reason, it is not an eraser processed into a small diameter like a normal mechanical pencil, so sufficient strength can be secured, so that it is possible to prevent the eraser from being broken as compared with a general mechanical pencil and to erase the handwriting with the eraser Can be improved.

Next, referring to FIGS. 2, 3 and 6 to 8, the operating body 7 of the mechanical pencil 1 in the state of FIG. 3 is operated (retracted operation), whereby the lead 14 is rotated, and the lead 14 is further moved. The state of being forwarded will be described.
2 and 3, when the user holds the mechanical pencil 1 and moves the operating body 7 backward with his finger against the resilience of the knocking spring 24 (first-stage retreating operation), the operating body The sliding cam 21 locked to the operating body 7 moves together with the slider 7 backward. At this time, the relationship between the rear cam 21b of the sliding cam 21, the rear cam 3b of the front cylinder 3, and the front cam 22b of the rotor 22 shifts from the state of FIG. 8A to the state of FIG. More specifically, when the sliding cam 21 retreats, the rear cam 21b of the sliding cam 21 and the front cam 22b of the rotor 22 come into contact with each other, and the rotor 22 moves backward by being pushed by the rear cam 21b. Since the front cam 22b of the rotor 22 and the rear cam 3b of the front cylinder 3 are cam-fitted, the rotor 22 is retracted and moves only by the gap generated between the front cam 22b and the rear cam 3b. The sliding cam 21 rotates leftward (clockwise as viewed from the rear of the shaft) in FIG. 8A along the cam slope 21c. When the rear cam 3b of the front cylinder 3 and the front cam 22b of the rotor 22 are completely separated, the rotor 22 rotates along the cam slope 21c to the position shown in FIG. 8B. When the rotor 22 rotates, the leading end member 9 which is locked to the rotor 22 so as not to rotate rotates, and the cylindrical body 13 screwed with the leading end member 9 simultaneously moves in the same direction. Rotate. Further, since the chuck 11 is repelled rearward by the chuck spring 17, the head 11 a of the chuck 11 is pressed against the front end of the tubular body 13 via the fastener 12. Therefore, the chuck 11, the fastener 12, and the core 14 held by the chuck 11 rotate together with the chuck 11 in the same direction. That is, with the rotation of the rotor 22, the lead-out mechanism 20 rotates with the lead 14 with respect to the barrel 4. As described above, since the rear cam 3b of the front cylinder 3 and the rear cam 21b of the sliding cam 21 are shifted by a half phase, the lead 14 in FIG. 6 and FIG. From the state, the state is rotated only by a half phase (about 45 ° in this embodiment).

At this time, the sliding projection 23a of the plate-like piece 23 moves from the inclined groove 7a2 of the sliding groove 7a of the operating body 7 to the end of the vertical groove 7a1 as shown in FIG. Moves along the side hole 2i of the front shaft 2 in a direction orthogonal to the longitudinal direction of the front shaft 2 (the operation body 7 side). As a result, the contact state between the plate-like piece 23 and the front end member 9 is released, and the tubular body 13 is movable with the front end member 9 backward. Since the vertical groove 7a1 of the operating body 7 is formed so as to extend in the same direction as the longitudinal direction of the front shaft 2, the sliding protrusion 23a of the plate-like piece 23 slides in the vertical groove 7a1 of the operating body 7. During this operation, the plate-like piece 23 is configured not to move.
Further, when the rotor 22 rotates, the collar 19 is disposed between the rotor 22 and the knocking spring 24, and the collar 19 is attached to the front shaft 2 so as not to rotate. When the child 22 rotates, the torsional force is not transmitted to the knocking spring 24, so that it is possible to prevent the knocking spring 24 from being twisted and from being damaged or changing its elasticity.

Here, when the operating body 7 is further moved rearward (the second stage of retreating operation), the rear end of the rotor 22 pressed by the sliding cam 21 and the rear flange 9f of the front opening member 9 come into contact with each other. The cylindrical body 13 moves backward together with the tip member 9 against the resiliency of the knocking spring 24 and the chuck spring 17.
At this time, the lead-out mechanism 20 tries to retreat as a whole with the retraction of the cylindrical body 13, but the rear end of the connecting body 15 and the inner step 16 b of the middle piece 16 come into contact with each other, so that the connection with the connecting body 15 is performed. The chuck 11 mounted on the body 15, the inner pipe 18, the fastener 12, and the core 14 held by the chuck 11 stop retreating at the same time, and the other components constituting the core feeding mechanism 20 move rearward. Moving. When the leading end member 9 is retracted, the inner step 9f of the leading end member 9 comes into contact with the front end of the fastener 12, and the fastener 12 is pushed back by the leading end member 9 to retract. As a result, when the fastener 12 is removed from the head 11a of the chuck 11, the three heads 11a of the chuck 11 are enlarged in diameter and spaced apart from each other by an amount corresponding to the movement of the fastener 12 rearward. C) is reached, and the state of holding the core 14 by the chuck 11 is released.
When the leading end member 9 is retracted, the lead holding member 8 holds the lead 14 with only a small force (about 10 g), so that the lead holding member 8 slides on the surface of the lead 14, The wick 14 is not damaged.

Here, when the rearward pressing of the operating body 7 (retracted state of the operating body 7) is released, the tip member 9 and the tubular body 13 move forward by the resilient forces of the knocking spring 24 and the chuck spring 17. At this time, since the chuck 11 does not hold the core 14, the leading end member 9 advances while holding the core 14, and relatively pulls the core 14 forward from the chuck 11. Then, the fastener 12 pushed forward by the tubular body 13 tightens the head 11a of the chuck 11 again, and when the core holding force of the core holding member 8 exceeds the core holding force of the chuck 11, it moves forward of the core 14. Relative movement is stopped.
Further, the operating body 7 and the cylindrical body 13 advance, and the sliding protrusion 23a of the plate-like piece 23 (stopper) that has slid in the vertical groove 7a1 of the sliding groove 7a of the operating body 7 is inclined with the vertical groove 7a1. At the boundary between the groove 7a2, the cam fitting between the rotor 22 and the front shaft 2 and the sliding cam 21 returns from the state shown in FIG. 8C to the state shown in FIG. When the sliding cam 21 moves forward and the rear cam 21b of the sliding cam 21 and the front cam 22b of the rotor 22 are out of contact with each other, the rotor 22 is displaced by the gap corresponding to the cam slope 3c of the rear cam 3b of the front cylindrical body 3. When the rotor 22 rotates to the left (clockwise direction as viewed from the rear of the shaft) in FIG. 3 and finally returns to the state shown in FIG. 3 before knocking, the rotor 22 becomes the front shaft 2 as shown in FIG. Is rotated by one phase of the rear cam 3b, and at the same time, the core 14 is also rotated by one phase (about 90 ° in this embodiment). That. In addition, the leading end member 9 continues to advance even after the advance of the lead 14 is completed because the lead holding member 8 holds the lead 14 with only a small force (about 10 g). The lead 14 is finally pulled out forward while rotating as much as the lead 14 is pulled out.
In the present invention, the angle of rotation of the wick by one retreat of the operating body is small when the angle of rotation at one degree is small, and the effect of eliminating the eccentricity of the wick is small. When writing at the edge occurs, the core is likely to be chipped or broken, so that the rotation angle at which the core is rotated by retreating the operating body once is preferably 30 ° or more and 180 ° or less, more preferably 60 ° or more. It is more preferable that the angle be 150 ° or less.

When the operation of pushing the operating body 7 backward is stopped by the first-stage retreating operation and the pushing of the operating body 7 is released, the state of FIG. 6 returns to the state of FIG. 3, and the lead 14 moves forward. Is carried out, only the rotation operation is performed, and the core 14 is rotated by one phase (about 90 °) of the rear cam 3b of the front shaft 2.
For this reason, in the present embodiment, by stopping the retreating operation of the operating body 7 at the first stage, the lead 14 can be rotated without extending forward. Further, since it is possible to prevent the core 14 from being unnecessarily extended when the core 14 is to be rotated, breakage of the core 14 due to excessive extension of the core 14 can be prevented. Furthermore, since the rotating operation of the lead 14 is performed by a pressing operation of the operating body 7 to the rear, even if a finger contacts the operating body 7 during writing, a force is applied to the front side of the barrel 4 to write on the finger. The rearward force is hardly applied to the operation body 7 because of the application. For this reason, the lead 14 does not rotate and the lead is not fed forward when writing, contrary to the user's will, and prevents the lead 14 from sinking backward by opening the head 11a of the chuck 11 during writing. it can.
Further, since the operating body 7 is irremovably locked to the sliding cam 21, the operating body 7 does not move forward even when a forward force is applied to the operating body 7 in the writing state of FIGS. 2 and 3. . For this reason, at the time of writing, since the operating body 7 serves as a support when gripping the shaft cylinder 4, it is difficult for the operating body 7 to slip even when a force is applied by applying a finger to the protrusion 7d formed on the side surface of the operating body 7, It became easier to write.

  Further, when it is not desired to carry out the lead-out operation of the lead 14, the retreat range of the first step and the second step are determined by the position of the operation body 7 so that the retreat operation of the operation body 7 can be stopped reliably at the first step. A mark may be provided on the barrel 4 or the operating body 7 so that the retreat range of the operating body 7 can be recognized. Good. In the case of the present embodiment, when the operation body 7 retreats from the first stage to the second stage, the pressing force required to move the operation body 7 backward by the elastic force of the chuck spring 17 is suddenly increased. The front cam 22b of the rotor 22 is moved from the rear cam 3b of the front cylindrical body 3 to the rear cam 21b of the sliding cam 21 while the second stage is recognized by the change in the feel when retreating. The contact sound between the front cam 22b and the rear cam 21b generated when the robot is completely moved, and the weak vibration transmitted to the hand holding the barrel 4 when the contact sound is generated are simultaneously transmitted to the user. Because it is transmitted, it is configured to make it easier to recognize that it has entered the second stage.

  Further, in the present embodiment, the release means of the plate-like piece 23 (stopper) is moved in the direction perpendicular to the longitudinal direction of the shaft cylinder 4 by moving the operating body 7 backward. As described above, the means for moving the stopper locks the sliding groove 7a formed in the operating body 7 and the sliding protrusion 23a of the plate-like piece 23 in a slidable manner. It is constituted by doing. For this reason, since the stopper function can be formed in parallel with the side portion of the centering mechanism 20, when the cross section of the shaft cylinder is substantially rectangular as in the present invention, the space on the side portion of the centering mechanism 20 is reduced. It can be used without waste. Since the configuration required for the present invention can be concentrated on the front side of the barrel 4, the rear barrel 5 attached to the rear of the barrel 4 can be freely formed except for the core accommodating chamber 5c. Therefore, it is possible to form a large accessory storage room 5d without forming the rear cylinder 5 long, and the accessory storage room 5d has various accessories other than the eraser shown in this embodiment. An object can be attached. Further, in the case of the present embodiment, the core accommodating chamber 5c of the rear cylinder body 5 can be formed large, so that a large number of extra cores can be accommodated in the core accommodating chamber 5c. When the eraser 6 is used, it may be used while being attached to the accessory storage room 5d, or may be used by detaching it. By mounting in the chamber 5d, it is possible to prevent the extra lead in the lead accommodating chamber 5c from going outside.

Further, as a first modification of the present embodiment, as shown in FIG. 9, a replacement lead case for storing a lead may be directly attached to the rear cylinder body. A first accessory storage portion 105d1 in which a known refill case X for a known mechanical pencil can be directly mounted, which can be opened / closed by rotating the opening of the core 14 housed therein, is formed in the rear cylinder 105 to be rotated. I have. Then, when the refill lead case X is inserted into the accessory accommodating portion 105d with the lead outlet opened, the lead lead is adjacent to the rear inner hole of the inner pipe 18 screwed to the front shaft 2. With such a configuration, the lead accommodating portion 105c is formed inside the rear tubular body 105, and the extra lead can be put into the inner pipe from the extra lead case X.
Note that an eraser 106 is provided in the second accessory storage portion 105d2 formed behind the refill lead case X.
Convenience has been improved by attaching the.

Further, in the first modification, since the core of the refill case X is configured to be attachable even in a closed state, the core can be supplied from the refill case X into the inner pipe 18 when not in use. Since the core 14 is not provided, the core 14 is not supplied unnecessarily due to breakage of the core 14 and vibration at the time of movement, thereby preventing the occurrence of core clogging.
In addition, in the case of the first modified example, in order to further improve the usability, it is preferable that the opening of the core of the replacement core case X can be opened and closed while being attached to the accessory storage portion 105d.

Further, as a second modification of the present embodiment, as shown in FIG. 10, a ball-point pen may be attached to the rear cylinder body to form a double-headed writing instrument. A core storage chamber 205c and an eraser 206 are attached to the inner hole 205b of the rear cylinder 205 mounted on the rear part so as to cover the rear part of the core storage chamber 205c, and a ballpoint pen Y is provided on the side of the core storage chamber 205c. An accessory storage room 205d that can be detachably mounted is provided.
In the second modification, the mechanical pencil 200 can be written upside down by switching the mechanical pencil 200 upside down, and the ballpoint pen Y can be used as a normal ballpoint pen by removing the ballpoint pen Y from the accessory mounting room 205d. By mounting the ball-point pen Y in the accessory mounting room 205d with the front and rear reversed, it can also function as a cap for preventing damage to the pen tip and drying due to the pen tip when being carried and also preventing other articles from being stained.

  The rod-shaped core feeding device of the present invention is not limited to writing instruments such as mechanical pencils, colored pencils, and crayons, and can be widely used for cosmetics such as lipsticks, eyeliners, eye shadows, lip balms, and medical instruments. .

1 ... mechanical pencil (rod-shaped lead-out tool),
2 front shaft, 2a inner hole, 2b notch, 2c front hole, 2d rear concave portion,
2e: inner step, 2f: rear female screw, 2g: rail projection, 2h: inner groove,
2i ... side hole,
3 front cylinder, 3a front opening, 3b rear cam, 3c cam slope,
4 ... Shaft tube,
Reference numeral 5: rear cylinder, 5a: mounting portion, 5b: inner hole portion, 5c: core accommodation room, 5d: accessory accommodation room,
5e: inclined portion,
6 ... Eraser, 6a ... Case,
7 ... operation body, 7a ... sliding groove (7a1 ... vertical groove, 7a2 ... inclined groove), 7b ... mounting part,
7c: rail groove, 7d: protrusion,
8 core holding member
9: front end member, 9a: front end opening, 9b: female screw portion, 9c: rear outer step portion,
9d: rail portion, 9e: rear flange portion, 9f: inner step portion,
10 ... Chuck unit,
11 ... chuck, 11a ... head,
12 ... fasteners,
13 ... cylindrical body, 13a ... male screw part, 13b ... rear step part, 13c ... inner step,
14 ... core,
15 ... linked body,
16 ... middle piece, 16a ... male screw part, 16b ... inner stage,
17… Chuck spring,
18 ... Inner pipe,
19: collar, 19a: projection, 19b: slit part,
20: core feeding mechanism,
21: sliding cam, 21a: projecting portion, 21b: rear cam, 21c: cam slope,
Reference numeral 22: rotor, 22a: groove-like portion, 22b: front cam, 22c: cam slope,
23: plate-shaped piece (stopper), 23a: sliding protrusion,
24 ... knock spring,
100: mechanical pencil (stick-shaped lead-out tool),
105: rear cylinder, 105c: core storage chamber, 105d1: first accessory storage chamber,
105d2 ... second accessory storage room,
106 ... Eraser,
200: Mechanical pencil (stick-shaped lead-out tool),
205: rear cylinder, 205d: accessory storage room,
206 ... Eraser,
X: extra lead case,
Y: Ballpoint pen.

Claims (4)

A core feeding mechanism including a shaft cylinder having a non-circular cross section, a chuck for holding a rod-shaped core, a fastener externally fitted to the chuck, and a tubular body for supporting the fastener at the rear. A rod-shaped core feeding tool, comprising: an operating body disposed movably back and forth on a front outer portion of the barrel, wherein the core is fed forward by sliding the operating body back and forth. ,
A sliding cam that slides back and forth in conjunction with the operating body and has a rear cam at a rear portion inside the shaft barrel, and a tubular shape that is disposed inside the sliding cam so as to be movable back and forth. A body, a rotor disposed behind the sliding cam and outside the chuck, and locked to the cylindrical body so as to be non-rotatable and movable back and forth, and locked to the operating body. With a stopper,
The cylindrical body is configured to move back and forth in conjunction with the sliding cam by restricting the backward movement by the stopper and releasing the restriction by the stopper,
By the rearward movement of the operating body, the stopper moves within the shaft cylinder, whereby the retraction restriction of the cylindrical body is released, and the rear cam of the sliding cam and the front cam of the rotor are moved. A rod-shaped core feeder, wherein the rotor is rotated in one direction with respect to the shaft cylinder by cam fitting, and the chuck is rotated in conjunction with the rotation of the rotor.   A locking projection is formed on the stopper, the locking projection is locked so as to slide in a sliding groove formed on an inner surface of the operating body, and the locking projection is moved by the rearward movement of the operating body. Is moved in the sliding groove, so that the stopper moves in a direction perpendicular to the axial direction of the barrel, whereby the retraction restriction of the tubular body is released. The rod-shaped core feeding tool according to claim 1.   The structure according to claim 1 or 2, wherein the tubular body is moved rearward by further moving the operating body backward, and the lead mechanism is operated to draw the lead forward. The rod-shaped core feeding tool described in the above. A rear cylinder body detachably mounted on the shaft cylinder is disposed behind the shaft cylinder,
The said back cylinder body was equipped with the core accommodating chamber which accommodates the said core, and the accessory accommodating chamber in which at least one accessory can be attached, The claim 1 characterized by the above-mentioned. 4. The rod-shaped core feeding device according to item 1.

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