CN117098673A - Mechanical pencil and rod-shaped body feeding device - Google Patents

Abstract

The mechanical pencil (10) has a core feeding mechanism (30), an operation unit (50), and a spare core housing unit (40). The core feeding mechanism (30) is disposed in the shaft tube (20) and has a clamp (31) for clamping the cartridge (80). The operation unit (50) moves the jig (31) forward. By operating the operation unit (50), the core feed mechanism (30) is operated, and the refill (80) protrudes from the front end opening (23 b) of the shaft (20). The spare refill accommodating section (40) is arranged behind the clamp (31), communicates with the clamp (31), and accommodates the spare refill (81). The preliminary core housing section (40) has a core housing chamber (40 a), the core housing chamber (40 a) has a scroll-like shape in cross section, and the core housing chamber (40 a) extends in the axial direction.

Description

Mechanical pencil and rod-shaped body feeding device

Technical Field

The present invention relates to a mechanical pencil having a spare lead storage section for storing a spare lead at the rear of a holder, and a stick body feeding device having a storage section for storing a spare stick body at the rear of the holder.

Background

Conventionally, a mechanical pencil having a preliminary lead storage portion for storing a preliminary lead (hereinafter referred to as a preliminary lead) at the rear of a holder for holding the lead has been widely used in mechanical pencils because the preliminary lead is supplied from the preliminary lead storage portion to the holder even when the lead is consumed by writing, and writing can be continued until the preliminary lead in the preliminary lead storage portion is exhausted.

In the mechanical pencil, since the longer the period until the refill is to be replenished, the more the refill is accommodated in the refill accommodating portion, writing can be continued without taking care of the remaining number of refill. Therefore, it is preferable that the preliminary core storing portion is formed as large as possible, but if the core storing portion is simply enlarged, the preliminary cores are concentrated in the passages communicating with the jigs in the preliminary core storing portion to interfere with each other, and movement of the preliminary cores is restricted by friction force between the preliminary cores, so that the preliminary cores may not be supplied to the jigs. Such problems are not limited to mechanical pencils, and may generally occur in a rod-shaped body feeding tool having a receiving portion for receiving a prepared rod-shaped body.

As means for solving the above-mentioned problems, JP2014-040083A discloses a push-type mechanical pencil in which a core penetration hole through which 1 core can pass is formed in the bottom surface of a core can accommodating the cores, and the core is easily introduced into the core penetration hole from the inside of the core can by applying impact and vibration to the core penetration hole from the lateral direction.

In the construction of this JP2014-040083A, the constitution is: the core guide portion below the bottom surface of the core can is penetrated by a round hole extending in the transverse direction, the core forming the operation protrusion is fitted into the round hole in a manner capable of reciprocating movement through the main body, the core insertion hole through which 1 core can pass but 2 cores cannot pass is provided in the middle portion of the core insertion main body, and the 1 core passing through the core insertion hole is guided into the core guide portion and reaches the guide tube at the front end through the clamp portion. As a result, since the core penetrating hole receives impact and vibration from the lateral direction by repeating pressing and releasing of the operation protrusion with respect to the core that falls from the bottom surface of the core can to the periphery of the core penetrating hole, the core is likely to pass through the core penetrating hole even if a large number of cores are stored in the core can and a large number of cores are present around the core penetrating hole.

However, in the configuration of JP2014-040083A, by providing a lateral sliding configuration of the operation protrusion, the configuration becomes complicated, and thus the cost may increase. Further, as the number of cores in the core pot increases, the interference between the cores in the core pot increases, so that it is necessary to apply stronger vibration, and the density may increase due to the increase in the number of cores, so that the cores cannot pass through the core penetration holes.

Disclosure of Invention

The present invention has been made in view of the above circumstances, and an object thereof is to provide a mechanical pencil capable of storing a large number of preliminary cores in a preliminary core storing portion, smoothly supplying the preliminary cores to a holder, and a stick body feeding tool capable of storing a large number of preliminary stick bodies in a storing portion, and smoothly supplying the preliminary stick bodies to the holder.

The mechanical pencil of the present invention comprises: a shaft cylinder; a core feeding mechanism disposed in the shaft cylinder and having a jig for holding the pen core; an operation unit that moves the jig forward; and a preliminary core housing portion disposed behind the jig, communicating with the jig, and housing a preliminary cartridge, wherein the cartridge feed mechanism is operated to project the cartridge from the distal end opening portion of the shaft barrel by operating the operation portion, the preliminary core housing portion has a core housing chamber having a scroll-like shape in a cross section, and the core housing chamber extends in an axial direction.

According to the present invention, since the preliminary core housing portion communicating with the jig is provided at the rear of the jig, and the preliminary core housing portion has the core housing chamber formed in a spiral shape in cross section, the preliminary cores can be aligned in order in the spiral core housing chamber. This makes it possible to provide the jig with a prepared pen core (prepared core) while minimizing interference between the prepared cores in the core housing chamber. Further, since the core housing chamber is arranged in the shape of a scroll, a large number of preliminary cores can be housed in the preliminary core housing portion, and thus the period until the preliminary cores are to be replenished can be prolonged, and labor can be reduced.

In addition, a communication hole that communicates with the jig may be provided at one end portion in the cross section of the core housing chamber, and in this case, by aligning the position of the one end portion in the cross section of the core housing chamber with the position of the jig, the supply from the core housing chamber to the jig can be smoothly performed, which is preferable.

In addition, the structure may be as follows: in this case, when writing is performed by using a mechanical pencil and the writing lead is worn, it is preferable that the preliminary core in the core housing chamber is easily replenished from the outer peripheral opening portion to the core housing chamber when the preliminary core in the core housing chamber is used up.

In this case, the outer peripheral opening of the core housing chamber can be closed by the cover member when the core housing chamber is replenished with a part other than the preliminary core, and therefore, the preliminary core replenished into the core housing chamber can be prevented from overflowing to the outside. In addition, the means for opening and closing the outer peripheral opening by the cover member may be configured such that the cover member is detachably engaged with the outer peripheral opening, or the cover member may be partially deformed to form the opening only when the core is replenished, or the entire cover member may be rotated with respect to the shaft tube by a hinge structure or the like to open and close the outer peripheral opening.

In this case, for example, the tip end of the core housing chamber may be formed deeper toward the front and the other tip end may be formed shallower, so that the preliminary core in the core housing chamber can be urged to move along the inclined portion from the other tip end to the one tip end when the mechanical pencil is held with the pen point facing the ground in the gravity direction.

The lead housing chamber may include one end portion overlapping with the central axis of the mechanical pencil and the other end portion distant from the central axis, and the mechanical pencil may have a communication hole through which the lead can be supplied from the rear to the one end portion without passing through the other end portion.

The lead housing chamber may include one end portion overlapping with the central axis of the mechanical pencil and the other end portion distant from the central axis, and the mechanical pencil may have an opening through which the lead can be supplied from the rear to the other end portion.

The rod-like body feeding device of the present invention further comprises: a shaft cylinder; a feed mechanism disposed in the shaft tube and having a clamp for clamping the rod-like body; an operation unit that moves the jig forward; and a housing portion disposed behind the jig, communicating with the jig, and housing a prepared rod, wherein the rod protrudes from the distal end opening portion of the shaft tube by operating the operation portion, and wherein the housing portion has a housing chamber having a scroll-like shape in a cross section and extending in an axial direction.

Effects of the invention

According to the present invention, a mechanical pencil can be provided in which a large number of preliminary cores can be stored in the preliminary core storing portion and the preliminary cores can be smoothly supplied to the holder. Further, according to the present invention, a rod-shaped body feeding tool that can accommodate a large number of prepared rod-shaped bodies in the accommodating section and smoothly feed the prepared rod-shaped bodies to the jigs can be provided.

Drawings

Fig. 1 is an external view of an example of a rod-shaped body feeding tool (mechanical pencil) in embodiment 1 of the present invention.

Fig. 2 is an end view showing the A-A end face of fig. 1.

Fig. 3 is an end view showing the B-B end face of fig. 2.

Fig. 4 is a developed view of the housing chamber of the housing section.

Fig. 5 is an explanatory view for explaining a state in which the pressing body is pressed from the state of fig. 2 to send out the rod-like body.

Fig. 6 is an explanatory view for explaining a state in which a preliminary stick body is supplied to the storage chamber in the stick body feeding apparatus of fig. 1.

Fig. 7 is a developed view of the storage chamber in a state in which the storage chamber is supplemented with the preliminary stick body.

Fig. 8 is an external view of an example of a rod-shaped body feeding tool according to embodiment 2 of the present invention.

Fig. 9 is a view showing the rod-shaped body feeding tool of fig. 8 in a state in which the prepared rod-shaped body can be supplied to the storage chamber.

Fig. 10 is a longitudinal sectional view corresponding to the line C-C of fig. 9.

Fig. 11 is a cross-sectional view corresponding to line D-D of fig. 10.

Fig. 12 is a cross-sectional view corresponding to line E-E of fig. 10.

Fig. 13 is an exploded perspective view of a portion of the wand delivery instrument of fig. 8.

Fig. 14 is a perspective view showing a front connecting member of the rod-shaped body feeding instrument of fig. 8.

Fig. 15 is a perspective view showing a front shaft of the stick-shaped body feeding device of fig. 8.

Fig. 16 is a perspective view showing a main body portion of a receiving member of the rod-like body feeding instrument of fig. 8.

Fig. 17 is a perspective view showing an outer tube of the stick-shaped body feeding device of fig. 8.

Fig. 18 is a perspective view showing a rear connecting member of the rod-like body feeding instrument of fig. 8.

Fig. 19 is a perspective view of the rear coupling member of fig. 18 from a different angle.

Fig. 20 is a developed view of the rod-like body delivery instrument of fig. 8 with the housing chamber expanded.

Fig. 21 is an external view of an example of a rod-shaped body feeding tool according to embodiment 3 of the present invention.

Fig. 22 is a longitudinal sectional view corresponding to the line F-F of fig. 21.

Fig. 23 is a cross-sectional view corresponding to the G-G line of fig. 22.

Fig. 24 is a cross-sectional view corresponding to the line H-H of fig. 22.

Fig. 25 is a cross-sectional view corresponding to the line I-I of fig. 22.

Fig. 26 is an exploded perspective view of a portion of the wand delivery instrument of fig. 21.

Fig. 27 is a perspective view showing a front shaft of the stick-shaped body feeding device of fig. 21.

Fig. 28 is a view showing the rod-shaped body feeding tool of fig. 21 in a state where the rear shaft is removed.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings attached to the present specification, for convenience of illustration and understanding, the scale, aspect ratio, and the like may be appropriately changed or exaggerated with respect to the actual object.

The terms such as "parallel", "perpendicular", "identical", and the like, values of length and angle, and the like, which are used in the present specification to determine the shape and geometry, are not strictly defined, and the scope of the extent to which the same function can be expected is to be included.

In the present specification, the direction in which the central axis of the rod-like body feeding tool 10 extends (longitudinal direction) is referred to as an axial direction, the direction perpendicular to the axial direction is referred to as a radial direction, and the direction along the circumference around the central axis is referred to as a circumferential direction. In the axial direction, the side of the shaft tube where the front end opening is located is denoted as the front side, and the opposite direction is denoted as the rear side. In addition, the direction toward the axial center (central axis) of the shaft tube is expressed as the inner side or the inner side along the radial direction, and the opposite direction is expressed as the outer side or the outer side.

(embodiment 1)

Fig. 1 is an external view showing an example of a stick body delivering device 10 according to embodiment 1 of the present invention, fig. 2 is an end view showing the A-A end face of fig. 1, fig. 3 is an end view showing the B-B end face of fig. 2, fig. 4 is an expanded view of the housing chamber 40a of the housing portion 40, fig. 5 is an explanatory view for explaining a state in which the pressing body 50 is pressed from the state of fig. 2 to deliver the stick body 80, fig. 6 is an explanatory view for explaining a state in which the stick body 80 is supplemented to the housing chamber 40a in the stick body delivering device 10 of fig. 1, and fig. 7 is an expanded view of the housing chamber 40a for explaining a state in which the prepared stick body 81 is supplemented to the housing chamber 40 a.

In embodiments 1 to 3, an example will be described in which the rod-shaped body feeding tool 10 is a mechanical pencil, the rod-shaped body 80 is a pencil lead for the mechanical pencil, and the preliminary rod-shaped body 81 is a preliminary pencil lead. In accordance with this, in embodiments 1 to 3, the stick body feeding tool 10, the stick body 80, and the preliminary stick body 81 are also referred to as a mechanical pencil 10, a writing lead 80, and a preliminary lead 81, respectively. The rod-shaped body feeding tool 10 is not limited to this, and may be a tool for feeding any rod-shaped body 80. The wand 80 may be, for example, a toothpick, a straw, disposable chopsticks, a cotton swab, a straight drill, or the like. In the case where the rod-shaped body 80 is a pencil lead for a mechanical pencil, the material of the pencil lead is not limited to graphite, and may be other writing members such as a color pencil lead, a crayon, and a chalk.

As shown in fig. 1 and 2, the mechanical pencil (stick-shaped body feeding device) 10 includes the following components: a shaft cylinder 20; a core feeding mechanism (feeding mechanism) 30 disposed inside the shaft tube 20 and having a jig 31 for holding the cartridge (stick-like body) 80; a preliminary core housing member (housing section, preliminary core housing section) 40 disposed behind the core feed mechanism 30 and housing a preliminary core (preliminary rod) 81; a pressing body (operating portion) 50 protruding rearward from the rear end opening of the shaft tube 20 from the rear of the preliminary core receiving member 40; and a cover member 70 detachably attached to the outer peripheral opening 22b of the shaft tube 20.

The shaft 20 includes the following components: a front shaft 21; a rear shaft 22 disposed behind the front shaft 21 and screwed to the front shaft 21; and a tip 23 disposed in front of the front shaft 21 and screwed to the front shaft 21.

The front shaft 21 is formed in a substantially tubular shape, and has a front male screw portion 21a on a front outer peripheral portion and a rear male screw portion 21b on a rear outer peripheral portion, the front male screw portion 21a being screwed with a rear female screw portion 23a formed on a rear inner peripheral portion of the tip 23, and the rear male screw portion 21b being screwed with a front female screw portion 22a formed on a front inner peripheral portion of the rear shaft 22. Further, a grip 21c made of an elastic body is integrally formed on the outer peripheral portion of the front shaft 21 by two-color molding. The rear inner peripheral portion has a stepped inner section 21d against which the coil spring 60 abuts.

The rear shaft 22 is formed in a substantially tubular shape, and has an outer peripheral opening 22b penetrating to an inner peripheral portion at an outer peripheral portion. The outer peripheral opening 22b is formed in a rectangular shape when viewed from the outside, and is formed to extend long in the axial direction. The length of the outer peripheral opening 22b in the axial direction is formed longer than the length of the preliminary core 81, and is configured so that the preliminary core 81 can be inserted into the rear shaft 22 from the outer peripheral opening 22b even when the preliminary core 81 is arranged in parallel in the axial direction of the rear shaft 22. As shown in fig. 3, a locked portion 22c to be locked by a locking portion 70a of the lid member 70 described later is formed on the inner wall of the outer peripheral opening portion 22b. A groove portion 22d extending in the axial direction is formed in the inner peripheral portion of the rear shaft 22, and a guide rail portion 40f of the preliminary core receiving member 40 described later is disposed in sliding contact with the groove portion 22d.

The pen head 23 is composed of a pen head main body 231 and a slider 232, and the slider 232 is disposed inside the pen head main body 231 so as to be slidable in the front-rear direction. The slider 232 is configured such that a tubular tip member 232a made of stainless steel is press-fitted to the slider body 232 b. Thus, a tip opening 23b from which the tip of the pen core 80 fed by the core feeding mechanism 30 disposed in the shaft 20 protrudes is formed at the tip of the pen tip 23, and a core holding portion 23c for holding the pen core 80 with a light force is formed at the inner peripheral portion of the pen tip 23. The slider body 232b is formed by molding using Polyacetal (POM).

The core feed-out mechanism (feed-out mechanism) 30 includes the following components: a clamp 31; a cylinder 32 connected to the rear of the jig 31 and through which the cartridge 80 passes; a fastener 33 externally fitted to the head 31a of the jig 31; a link 34 that blocks the fastener 33 at the rear; and a coil spring 35 disposed between the coupling member 34 and the cylinder 32.

The clip 31 is configured to be movable back and forth with respect to the coupling 34 together with the cylinder 32. The head 31a of the holder 31 is divided into two parts in the axial direction, and the divided heads 31a are formed so as to be gradually separated from each other toward the front, and the heads 31a are respectively deflected inward in the radial direction so as to be capable of holding the pen core 80.

The coupling member 34 is clamped and fixed to the barrel 20 by the front end of the front shaft 21 and the inner section of the pen head 23 screwed with the front shaft 21. The coil spring 35 is stretched between the inner section of the coupling 34 and the front end of the cylinder 32, and the clamp 31 and the cylinder 32 are pushed rearward with respect to the coupling 34 and the shaft 20 by the elastic force of the coil spring 35.

Next, the preliminary core housing member 40 (housing section, preliminary core housing section) will be described in detail. The preliminary core receiving member 40 is disposed inside the shaft tube 20 so as to be movable forward and backward with respect to the rear shaft 22 (the shaft tube 20). The preliminary core housing member 40 has a core housing chamber 40a extending forward from the rear end, and a bottom 40b is formed at the front end of the core housing chamber 40 a. The front portion 40j of the preliminary core receiving member 40 is formed to have a smaller outer diameter than the central portion and the rear portion, and the front portion 40j is slidably inserted in the inner peripheral portion of the cylinder 32. The front portion 40i of the preliminary core receiving member 40 is configured to be able to abut against the rear end of the cylinder 32, and thus is configured to be able to press the cylinder 32 forward when the preliminary core receiving member 40 advances.

As shown in fig. 3, the core housing chamber 40a is formed so as to draw a vortex from the center portion toward the outer peripheral portion when viewed in the cross-sectional direction, and one end portion 40c (center portion) has a communication hole 40h communicating with the cylinder 32 and the jig 31. The communication hole 40h has an inner diameter through which 1 preliminary core 81 can pass but 2 preliminary cores 81 cannot pass, whereby the preliminary cores 81 are supplied to the jig 31 one by one via the communication hole 40h. When the core housing chamber 40a is spread out in a planar shape as shown in fig. 4, the bottom 40b of the core housing chamber 40a has an inclined portion 40e formed obliquely from one end portion 40c (central portion) toward the other end portion 40d (peripheral portion). When the tip of the writing is directed downward in the gravity direction in order to grip the mechanical pencil 10 by the inclined portion 40e, the preliminary core 81 is configured to advance toward the one end portion 40c along the inclined portion 40e. Further, regarding the angle of the inclined portion 40e with respect to the direction perpendicular to the axial direction, if the inclination is too large, the load may be excessively applied to the preliminary core 81 located on the one end portion 40c side, and the preliminary core 81 may engage with the adjacent preliminary core, resulting in difficulty in ejection from the communication hole 40h. In addition, if the inclination is too small, the preliminary core 81 is difficult to enter the one end portion 40c side, and therefore the inclination angle X of the inclined portion 40e is preferably formed at 5 ° < X < 45 °, more preferably at 15 ° < X < 30 °. In the present embodiment, specifically, by forming the inclination angle X of the inclined portion 40e to be 19 °, the preliminary core 81 gradually enters the one end portion 40c side. The core housing chamber 40a is formed with a width from the one end 40c toward the other end 40d so that the preliminary cores 81 are not arranged in parallel, and thus the number of the preliminary cores 81 in contact with other preliminary cores in the core housing chamber 40a is not more than 2. Specifically, in the present embodiment, by forming the outer diameter of the preliminary core 81 (cartridge 80) to 0.58mm and the width of the core housing chamber 40a to 0.80mm, the preliminary cores 81 are not arranged in parallel but arranged in 1 row.

In a cross section perpendicular to the central axis, the core housing chamber 40a extends so as to draw a vortex from one end portion (central portion) 40c overlapping the central axis toward the other end portion (outer peripheral portion) 40d distant from the central axis. In the present embodiment, in a cross section perpendicular to the central axis, the core housing chamber 40a extends so as to advance counterclockwise from the other end portion 40d toward the one end portion 40c when viewed from the rear. In this case, after the preliminary core 81 is accommodated in the core accommodating chamber 40a through the outer peripheral opening 22b, the user rotates the mechanical pencil 10 clockwise when viewed from the rear, and the preliminary core 81 moves from the other end portion 40d toward the one end portion 40 c. The clockwise rotation when viewed from the rear is the direction of rotation when the screw is normally tightened, and has the advantage of easy memory for the user. In addition, the present invention has an advantage that clockwise rotation is easy to rotate when viewed from the rear, particularly for right-handed users. In addition, the present invention is not limited to this, and the core housing chamber 40a may extend so as to advance clockwise from the other end 40d toward the one end 40c when viewed from the rear in a cross section perpendicular to the central axis.

Further, on the outer peripheral surface of the preliminary core receiving member 40, rail portions 40f extending in the axial direction and protruding outward are formed symmetrically at 2 with respect to the axial center, and the rail portions 40f are configured to be in sliding contact with the groove portions 22d of the rear shaft 22, whereby the preliminary core receiving member 40 is configured to be not rotatable relative to the rear shaft 22 (the shaft tube 20) and to be movable forward and backward. The outer peripheral portion of the preliminary core housing member 40 has an opening 40g connected to the core housing chamber 40a, and the preliminary core 81 can be supplied from the outer peripheral opening 22b to the core housing chamber 40a by configuring the opening 40g to coincide with the position of the outer peripheral opening 22b of the rear shaft 22 (the shaft tube 20) and the outer peripheral opening 22b to communicate with the core housing chamber 40 a.

Further, the coil spring 60 is stretched between the front section 40i of the preliminary core receiving member 40 and the inner section 21d of the front shaft 21, whereby the preliminary core receiving member 40 is sprung rearward by the elastic force of the coil spring 60. In addition, the elastic force of the coil spring 60 in the state of fig. 2 may be configured to be equal to or greater than the load in the state where the preliminary core 81 enters the core housing chamber 40a to the limit, and in this case, the preliminary core housing member 40 does not advance as long as the pressing body 50 (operation portion) is not pressed forward by the elastic force of the coil spring 60, and therefore the clamp 31 is not pressed forward by the weight of the preliminary core housing member 40 and the preliminary core 81, so that the clamping force of the clamp 31 on the pen core 80 can be maintained.

The cover member 70 is attached to close the outer peripheral opening 22b of the rear shaft 22, and has a locking portion 70a extending in the axial direction and formed in a rail shape. The locking portion 70a is locked with the locked portion 22c formed on the inner peripheral portion of the outer peripheral opening 22b, whereby the lid member 70 is fixed to the rear axle 22, and the outer peripheral opening 22b is closed. In the present embodiment, the cover member 70 is formed of an elastic body so that the cover member 70 can be easily attached and detached, and the locking force is not reduced even if the attachment and detachment are repeated. Specifically, as a material of the elastic body constituting the cover member 70, silicone rubber, nitrile rubber, synthetic rubber, urethane rubber, thermoplastic elastomer, or the like can be preferably used. The cover member 70 is not limited to this, and may be made of a relatively hard resin or metal. Further, although not shown, a clamp portion may be provided on the outer side of the cover member 70 so as to protrude outward with respect to the shaft tube 20, and in this case, the effect of easily attaching and detaching the cover member 70 to and from the shaft tube 20 by gripping the clamp portion with fingers can be achieved. Further, the hinge portion may be provided on the outer peripheral portion of the shaft tube 20 to rotate the cover member, thereby opening and closing the outer peripheral opening 22 b.

The pressing body 50 is slidably inserted into the rear shaft 22 in the front-rear direction, and is inserted so that the rear portion thereof protrudes rearward from the rear end opening of the rear shaft 22. Further, a flange-like portion 50a protruding outward is formed on the outer peripheral portion of the distal end of the pressing body 50, and the pressing body 50 is prevented from coming off the rear shaft 22 by the flange-like portion 50a abutting against the rear inner section of the rear shaft 22. The front end of the pressing body 50 is configured to be able to abut against the rear end of the preliminary core housing member 40, and thus, the preliminary core housing member 40 is configured to move forward by pressing the pressing body 50 forward.

Next, a state in which the pen core 80 is sent out from the tip opening 23b of the pen head 23 by advancing the pressing body 50 will be described with reference to fig. 5.

When the pressing body 50 is pressed forward from the state of fig. 2, the preliminary core housing member 40 that is in contact with the tip of the pressing body 50 is simultaneously pressed forward, and the preliminary core housing member 40 advances against the elastic force of the coil spring 60. When the cartridge receiving member 40 is advanced to bring the rear end of the tubular body 32 into contact with the front end portion 40i, the tubular body 32 and the holder 31 fixed to the tubular body 32 are advanced relative to the shaft 20 and the coupling member 34 against the elastic force of the coil spring 35 while holding the pen core 80, and the pen core 80 is sent out from the front end opening portion of the pen head 23. At this time, the fastener 33 externally fitted to the head 31a of the holder 31 is also advanced along with the advancement of the holder 31, but the tip of the fastener 33 abuts against the inner section of the pen head 23, so that the fastener 33 is separated from the head 31a of the holder 31, the head 31a is expanded to release the holding state of the pen core 80, and the advancement of the pen core 80 is stopped. When the pressing body 50 is released from being pressed forward, the clip 31 is retracted by the elastic force of the coil spring 35, and the fastener 33 is fitted to the head 31a again, so that the pen core 80 is held by the clip 31. The preliminary core receiving member 40 and the pressing body 50 are retracted by the elastic force of the coil spring 60 until the flange-like portion 50a of the pressing body 50 comes into contact with the inner section of the rear end opening of the rear shaft 22, and the state of fig. 2 is returned.

Next, a state in which the preliminary core 81 is replenished to the core housing chamber 40a of the preliminary core housing member 40 will be described with reference to fig. 6.

When the spare core 81 stored in the core storage chamber 40a is used up or reduced by writing with the mechanical pencil 10 from the state of fig. 2, the cover member 70 can be detached from the outer peripheral opening 22b of the rear shaft 22 (shaft tube 20) as shown in fig. 6 by gripping and pulling the cover member 70 with fingers in order to replenish the spare core. At this time, in the present embodiment, since the cover member 70 is formed of an elastic body, the locked state of the locked portion 70a and the locked portion 22c is gradually released from the end portion by pulling the cover member 70, and thus the cover member can be easily removed. In the state of fig. 6, the outer peripheral opening 22b is open, and the outer peripheral opening 22b communicates with the other end 40d of the core housing chamber 40a, so that the preliminary core 81 can be replenished from the outer peripheral opening 22b to the other end 40d of the core housing chamber 40 a. As means for moving the preliminary core 81 that has entered the other end portion 40d of the core housing chamber 40a toward the one end portion 40c (center portion), the removed cover member 70 is attached again to the outer peripheral opening portion 22b and closed, and then the mechanical pencil 10 is rotated in the circumferential direction or the mechanical pencil 10 is held upright with the tip opening portion 23b facing downward in the gravitational direction, and by slightly applying a vertically weak vibration, the preliminary core 81 is moved toward the one end portion 40c in the arrow direction by the inclined portion 40e, as shown in fig. 7, whereby the preliminary core 81 can be replenished from the communication hole 40h to the holder 31. Since the core housing chamber 40a is formed in a spiral shape when viewed in the cross-sectional direction as shown in fig. 3, a large number of curved wall surfaces are formed from the other end portion 40d toward the one end portion 40c, and the radii of curvature thereof are formed so as to become gradually smaller toward the one end portion. Therefore, even if the mechanical pencil 10 is held upright, the preliminary core 81 entering the core housing chamber 40a is supported by the curved wall surface of the core housing chamber 40a so as not to fall down, and is moved toward the one end 40c while maintaining the state of being oriented in the axial direction.

In the present embodiment, when the core housing chamber 40a is viewed in the cross-sectional direction, the core housing chamber is formed in a spiral shape from one end portion 40c (center portion) toward the other end portion 40d (outer peripheral portion). Therefore, since the core housing chamber 40a has an elongated strip shape, the preliminary cores 81 are aligned in the core housing chamber 40a, interference between the preliminary cores 81 can be minimized, and a large number of the preliminary cores 81 can be housed in the core housing chamber 40 a. Specifically, in the present embodiment, the number of cores in which the number of the refill 80 held by the holder 31 and the plurality of preliminary cores 81 stored in the cartridge storage chamber 40a is more than 60 can be stored. Further, since the inclined portion 40e is provided at the bottom portion 40b, the preliminary cores 81 stored in the core storage chamber 40a are concentrated on the one end portion 40c side, and the preliminary cores 81 can be supplied from the communication hole 40h into the jig 31. Here, when the core housing chamber 40a is formed in a shape extending linearly when viewed in the cross-sectional direction, the entire weight of the preliminary core 81 on the other end portion 40d side is applied to the preliminary core 81 on the one end portion 40c side, and the preliminary core 81 located on the one end portion 40c may be prevented from entering the communication hole 40h by the pressure due to the weight. However, in the present embodiment, since the core housing chamber 40a has a spiral shape having a large number of curved surfaces, the weight of the preliminary core 81 on the other end portion 40d side is dispersed by abutting against the wall portion of the core housing chamber 40a having a curved surface, and the effect of reducing the force applied to the preliminary core 81 located at the one end portion 40c is achieved. In particular, in the vicinity of the one end 40c, the radius of curvature of the wall surface of the core housing chamber 40a becomes small, and thus the above-described effects become remarkable. Therefore, the pressure applied to the preliminary core 81 located at the one end portion 40c due to the weight of the preliminary core 81 on the other end portion 40d side is reduced, and the preliminary core 81 can be freely replenished to the jig 31 via the communication hole 40h. Therefore, even if a large number of preliminary cores 81 are stored in the core storage chamber 40a of the preliminary core storing member 40, the preliminary cores 81 are smoothly supplied to the jig 31, and can be used comfortably.

In the present embodiment, the pressing body 50 is attached to the rear shaft 22 so as to be movable back and forth and so as not to be detachable, but the pressing body 50 as a whole or a part of the pressing body 50 may be configured so as to be detachable, so that the preliminary core 81 (not shown) can be replenished into the rear shaft 22 (the shaft tube 20) from the rear end side, and in this case, the preliminary core can be replenished directly from the rear side to the one end 40c of the core housing chamber 40a when the preliminary core is replenished into the core housing chamber 40 a.

(embodiment 2)

Embodiment 2 of the present invention will be described with reference to fig. 8 to 20. In the following description and the drawings used in the following description, the same reference numerals as those used for the corresponding parts in embodiment 1 are used for the parts that can be configured similarly to embodiment 1, and overlapping description is omitted.

Fig. 8 is an external view of an example of the rod-shaped body feeding tool (mechanical pencil) 10 in the present embodiment, and fig. 9 is a view showing the rod-shaped body feeding tool 10 in a state in which a preliminary rod-shaped body (preliminary core) 81 can be supplied to the housing chamber 40 a. Fig. 10 is a longitudinal sectional view of the rod-like body feeding device 10 corresponding to the line C-C in fig. 9. Fig. 11 is a cross-sectional view corresponding to line D-D of fig. 10, and fig. 12 is a cross-sectional view corresponding to line E-E of fig. 10. Fig. 13 is an exploded perspective view of a part of the rod-shaped body feeding instrument 10. Fig. 14 is a perspective view showing the front connecting member 44, fig. 15 is a perspective view showing the front shaft 21, fig. 16 is a perspective view showing the main body of the housing member 40, and fig. 17 is a perspective view showing the outer tube 26. Fig. 18 is a perspective view showing the rear coupling member 46, and fig. 19 is a perspective view of the rear coupling member 46 from a different angle. Fig. 20 is a developed view of the rod-shaped body feeding tool 10 in which the housing chamber 40a is developed.

The shaft tube 20 of the present embodiment includes a front shaft 21, a rear shaft 22, a pen tip 23, a 1 st coupling member 24, a 2 nd coupling member 25, an outer tube 26, and an O-ring 27.

In the present embodiment, the front shaft 21 is a member in which the preliminary core housing member (housing portion, preliminary core housing portion) 40 is housed. The 1 st outer peripheral opening 21e (see fig. 15) is provided in the wall of the front shaft 21. The 1 st outer peripheral opening 21e is a through hole penetrating the wall of the front shaft 21 in the radial direction. The 1 st outer peripheral opening 21e is formed in a rectangular shape when viewed from the outside, and is formed to extend long in the axial direction. The 1 st outer peripheral opening 21e is formed to have a length in the axial direction longer than that of the preliminary core 81, so that the preliminary core 81 can be inserted into the front shaft 21 from the 1 st outer peripheral opening 21e even when the preliminary core 81 is arranged in parallel in the axial direction of the front shaft 21.

An engaged portion 21f is provided at the rear end portion of the front shaft 21, and the engaged portion 21f is engaged by an engaging portion 25a provided at the front end portion of the 2 nd coupling member 25. A guide rail portion 21g is provided on the inner surface of the front shaft 21. The rail portion 21g protrudes inward from the main body portion of the front shaft 21 and extends in the axial direction. The guide rail portion 21g holds the preliminary core receiving member 40 so as to be movable forward and backward with respect to the front shaft 21 and so as not to be rotatable.

The pen head 23 is mounted on the front shaft 21 via the 1 st coupling member 24. In the present embodiment, the female screw portion provided on the inner surface of the rear end portion of the pen head 23 is screwed with the male screw portion provided on the outer surface of the front end portion of the 1 st coupling member 24. Further, a female screw portion provided on the inner surface of the front end portion of the front shaft 21 is screwed with a male screw portion provided on the outer surface of the rear end portion of the 1 st coupling member 24. Thereby, the tip 23 is coupled to the front shaft 21. In the example shown in fig. 10, the coupling member 34 is clamped and fixed to the shaft 20 by the tip of the 1 st coupling member 24 and the inner section of the pen head 23.

The rear shaft 22 is attached to the front shaft 21 via a 2 nd coupling member 25. In the present embodiment, the male screw portion provided on the outer surface of the front end portion of the rear shaft 22 is screwed with the female screw portion provided on the inner surface of the rear end portion of the 2 nd coupling member 25. The engagement portion 25a provided at the front end portion of the 2 nd coupling member 25 is engaged with the engaged portion 21f provided at the rear end portion of the front shaft 21. Thereby, the front shaft 21 and the rear shaft 22 are coupled. In the present embodiment, the engaging portion 25a is a claw portion protruding outward in the radial direction, and the engaged portion 21f is a through hole penetrating the front shaft 21 in the radial direction. In fig. 13 and 15, the engaging portion 25a and the engaged portion 21f are not shown.

The outer tube 26 is a tubular member having a central axis extending in the axial direction, and is disposed radially outward of the front shaft 21. The central axis of the outer tube 26 coincides with the central axis of the front shaft 21. The outer tube 26 is rotatable about the central axis with respect to the shaft tube 20 (front shaft 21).

The 2 nd outer circumferential opening 26a (see fig. 17) is provided in the wall of the outer tube 26. The 2 nd outer peripheral opening 26a is a through hole penetrating the wall of the outer tube 26 in the radial direction. The 2 nd outer peripheral opening portion 26a is formed in a rectangular shape when viewed from the outside, and is formed to extend long in the axial direction. The length of the 2 nd outer peripheral opening portion 26a in the axial direction is formed longer than the length of the preliminary core 81. The shape and size of the 2 nd outer peripheral opening 26a viewed from the outside may be the same as those of the 1 st outer peripheral opening 21e of the front axle 21. In the present embodiment, when the outer tube 26 is rotated about the central axis with respect to the front shaft 21 so that the 1 st outer peripheral opening 21e coincides with the 2 nd outer peripheral opening 26a when viewed from the outside, the preliminary core 81 can be inserted into the front shaft 21, in particular, into the core housing chamber 40a through the 1 st outer peripheral opening 21e and the 2 nd outer peripheral opening 26 a. The preliminary core 81 can be prevented from flying out from the inside of the core housing chamber 40a in a state where the 1 st outer peripheral opening 21e and the 2 nd outer peripheral opening 26a do not coincide with each other when viewed from the outside.

An O-ring 27 is disposed between the front shaft 21 and the outer tube 26. The O-ring 27 is formed of an elastic member such as rubber, and has a function of generating an appropriate frictional force between the front shaft 21 and the outer tube 26. Accordingly, the outer tube 26 can be restrained from unintentionally rotating relative to the front shaft 21 when the user does not apply a circumferential force to the outer tube 26. The O-ring 27 also has a function of suppressing axial movement of the outer tube 26. This can suppress the outer tube 26 from rocking in the axial direction.

The preliminary core housing member (housing portion, preliminary core housing portion) 40 includes a main body portion 42 (see fig. 16), a front coupling member 44 (see fig. 14), and a rear coupling member 46 (see fig. 18). The core housing chamber (housing chamber) 40a of the present embodiment is a space surrounded by the main body 42, the front connecting member 44, and the rear connecting member 46. The front connecting member 44 defines a front end surface of the core housing chamber 40a, the rear connecting member 46 defines a rear end surface of the core housing chamber 40a, and the main body 42 defines a side surface of the core housing chamber 40 a.

The core housing chamber 40a of the present embodiment is located at the front portion of the mechanical pencil 10. Specifically, the center of the core housing chamber 40a in the axial direction is located forward of the center of the mechanical pencil 10 in the axial direction. By disposing the core housing chamber 40a in this manner, the preliminary core 81 having a relatively large weight and housed in the preliminary core housing member 40 and the core housing chamber 40a is disposed inside the shaft tube 20 at a portion to be gripped by a user when the mechanical pencil 10 is used. In this case, the center of gravity of the mechanical pencil 10 approaches a portion to be held by the user, and weight balance that is easy for the user to write can be achieved.

As shown in fig. 11, the core housing chamber 40a of the present embodiment does not include a portion extending linearly except for the vicinity of the other end portion (outer peripheral portion) 40d in a cross section (cross section) perpendicular to the central axis. The vicinity of the other end portion 40d here refers to a portion of the core housing chamber 40a facing the 1 st outer peripheral opening portion 21 e. In other words, the core housing chamber 40a is entirely formed of a curve in cross section except for the vicinity of the other end portion (outer peripheral portion) 40 d. In particular, the core housing chamber 40a is entirely formed of a curve protruding outward in the radial direction except for the vicinity of the other end portion (outer peripheral portion) 40d in the cross section. In the core housing chamber 40a, when a portion other than the vicinity of the other end portion (outer peripheral portion) 40d includes a portion extending in a straight line in the cross section, there is a possibility that the preliminary core 81 may tilt with respect to the axial direction at the straight line portion. In this case, the preliminary core 81 is blocked at the portion where the core toppling occurs, and the preliminary core 81 is not supplied to the one end 40 c. In the present embodiment, since the core housing chamber 40a does not include a portion extending linearly in the vicinity of the other end portion 40d in the cross section, occurrence of core tilting in the core housing chamber 40a is suppressed.

The front connecting member 44 seals the front end of the main body 42, and serves as a connecting portion with the cylinder 32 in the preliminary core housing member 40. The front coupling member 44 includes a front portion 44a, a flange portion 44b, a communication hole 44c, and a rear protruding portion 44d. The front portion 44a is formed to have a smaller outer diameter than the flange portion 44b, and the front portion 44a is slidably inserted in the inner peripheral portion of the cylinder 32. The flange portion 44b has an outer diameter larger than that of the front portion 44a, and abuts against the front end of the main body portion 42. The communication hole 44c axially penetrates the front portion 44a and the flange portion 44b along the center axis of the mechanical pencil 10. The communication hole 44c has an inner diameter through which 1 preliminary core 81 can pass but 2 preliminary cores 81 cannot pass, whereby the preliminary cores 81 are supplied from the core housing chamber 40a to the jig 31 one by one via the communication hole 44 c. The rear protruding portion 44d protrudes rearward from the flange portion 44b. The rear protruding portion 44d is inserted into a groove portion of the main body portion 42 that divides the core housing chamber 40 a. Thus, the rear end surface of the rear protruding portion 44d defines the bottom 40b, which is the front end surface of the core housing chamber 40 a.

An inclined portion 40e is formed on the rear end surface of the rear protruding portion 44d. As shown in fig. 14 and 20, in the present embodiment, an inclined portion 40e is formed in a part of the bottom portion 40b of the core housing chamber 40a in the vicinity of only the communication hole 44 c. Thus, when the mechanical pencil 10 is held such that the distal end opening 23b faces downward, the preliminary core 81 is guided by the inclined portion 40e toward the communication hole 44c in the vicinity of the communication hole 44 c. Note that, the present invention is not limited to this, and the entire bottom portion 40b may be the inclined portion 40e as in embodiment 1.

The rear connecting member 46 seals the rear end of the main body 42, and serves as a connecting portion with the pressing body (operating portion) 50 in the preliminary core housing member 40. The rear coupling member 46 includes a main body 46a, a flange 46b, a communication hole 46c, and a holding portion 46d. The main body 46a is a rod-like member extending in the axial direction. The flange 46b has an outer diameter larger than that of the main body 46a, and abuts against the rear end of the main body 42. The communication hole 46c axially penetrates the main body portion 46a and the flange portion 46b along the central axis of the mechanical pencil 10. The communication hole 46c communicates with the one end 40c of the core housing chamber 40a, and the preliminary core 81 can be inserted from the rear to the one end 40c of the core housing chamber 40a through the communication hole 46 c. The communication hole 46c may have an inner diameter through which 1 preliminary core 81 can pass but through which 2 preliminary cores 81 cannot pass. In this case, the preliminary core 81 is inserted from the rear toward the core housing chamber 40a through the communication hole 46 c.

The mechanical pencil 10 has an erasing member 52 such as a rubber. The holding portion 46d has a function of holding the erasing member 52. The erasing member 52 abuts against the rear end of the communication hole 46 c. A cap is attached to the holding portion 46d so as to cover the erasing member 52. In the present embodiment, the cap portion serves as a pressing body (operation portion) 50.

When the preliminary core 81 is stored in the core storage chamber 40a through the 1 st outer peripheral opening 21e and the 2 nd outer peripheral opening 26a, the user rotates the mechanical pencil 10 around the central axis, and the preliminary core 81 moves from the other end 40d toward the one end 40 c. In particular, in the present embodiment, the preliminary core 81 is moved from the other end portion 40d toward the one end portion 40c by the user rotating the mechanical pencil 10 clockwise about the central axis when viewed from the rear. In this case, a certain amount of time and effort may be required until the preliminary core 81 moves from the other end portion 40d to the one end portion 40 c. On the other hand, it is sometimes desirable to supply the preliminary core 81 to the holder 31 immediately from the outside of the mechanical pencil 10. In the present embodiment, the cap and the erasing member 52 are removed from the holding portion 46d, so that the rear end of the communication hole 46c is exposed. In this state, the preliminary core 81 can be inserted into the one end 40c of the core housing chamber 40a through the communication hole 46 c. Therefore, the preliminary core 81 can be quickly and easily inserted into the one end 40c without passing through the other end 40d of the core housing chamber 40 a.

In the mechanical pencil 10, after writing with the lead 80 is completed or the like, the tip opening 23b may be pressed against the paper surface or the like while the pressing body 50 is pressed forward, whereby the lead 80 protruding forward from the tip opening 23b may be retracted, and the lead 80 may be accommodated. When the length of the lead 80 is shortened due to abrasion or breakage, the preliminary lead 81 may be positioned behind the lead 80, and the lead 80 and the preliminary lead 81 may be axially aligned. In this case, when the refill 80 is retracted, the preliminary refill 81 may be retracted. At this time, the rear end of the preliminary core 81 may deviate from the central axis and come into contact with the rear end surface (the front surface of the flange portion 46 b) of the core housing chamber 40 a. In this case, the cartridge 80 and the preliminary cartridge 81 cannot be moved backward further, and the cartridge 80 cannot be stored.

In order to prevent such a problem, in the present embodiment, an inclined surface 46e is provided on the front surface of the flange portion 46b (see fig. 19 and 20). The inclined surface 46e extends obliquely with respect to the axial direction and the radial direction so as to approach the communication hole 46c as going rearward. The rear end (inner end) of the inclined surface 46e is connected to the communication hole 46c. In the present embodiment, when the preliminary core 81 located at the rear of the pen core 80 retreats together with the pen core 80, even if the rear end of the preliminary core 81 deviates from the central axis, the rear end of the preliminary core 81 is guided by the inclined surface 46e toward the communication hole 46c. When the rear end of the preliminary core 81 is located in the communication hole 46c, the preliminary core 81 can move rearward in the communication hole 46c. Therefore, the cartridge 80 and the preliminary cartridge 81 cannot be retreated any further. That is, even in this case, the cartridge 80 can be properly housed.

The outer peripheral surface of the preliminary core receiving member 40 is provided with a groove portion 40k extending linearly in the axial direction. A guide rail portion 21g of the front axle 21 is disposed in the groove portion 40k. The groove portion 40k and the rail portion 21g can move forward and backward with respect to each other, but movement in the circumferential direction is restricted. Thus, the preliminary core receiving member 40 is disposed so as to be movable back and forth with respect to the front shaft 21 and is not rotatable. The groove 40k is formed over the entire range of the main body 42 and the flange 46b of the rear coupling member 46.

Next, a method for replenishing the rod (preliminary core) 81 to the rod feeding tool (mechanical pencil) 10 according to the present embodiment will be described.

In the state shown in fig. 8, the outer tube 26 is rotated about the central axis (in the circumferential direction) with respect to the front shaft 21, so that the 1 st outer peripheral opening 21e and the 2 nd outer peripheral opening 26a coincide with each other when viewed from the outside. This brings the state shown in fig. 9. In the state shown in fig. 9, the preliminary core 81 is inserted into the core housing chamber 40a through the 1 st outer peripheral opening 21e and the 2 nd outer peripheral opening 26 a. In particular, the preliminary core 81 is inserted into the other end portion (outer peripheral portion) 40d of the core housing chamber 40 a. The preliminary core 81 is disposed in the other end portion 40d in a posture in which its longitudinal direction extends parallel to the axial direction. At this time, a plurality of preliminary cores 81 may be inserted into the storage chamber 40 a. Thereafter, the outer tube 26 is rotated about the central axis with respect to the front shaft 21, and the 2 nd outer peripheral opening 26a is displaced from the 1 st outer peripheral opening 21e when viewed from the outside. For example, the outer tube 26 is rotated relative to the front shaft 21 so that the 1 st outer peripheral opening 21e is not visible through the 2 nd outer peripheral opening 26 a.

When the mechanical pencil 10 is rotated about the central axis, the preliminary core 81 inserted into the other end portion 40d moves toward the one end portion 40c (central portion). In the present embodiment, the preliminary core 81 is moved from the other end portion 40d to the one end portion 40c by rotating the mechanical pencil 10 clockwise when viewed from the rear. When the mechanical pencil 10 is held with the front end opening 23b facing downward, the front end of the preliminary core 81 positioned at the one end portion 40c moves forward along the inclined portion 40e of the housing chamber 40a, and passes through the communication hole 44c of the front connecting member 44 to move toward the holder 31.

In the present embodiment, the preliminary core 81 may be inserted into the one end 40c without passing through the other end 40 d. First, the cap and the erasing member 52 are removed from the holding portion 46d of the rear coupling member 46. Thereby, the rear end of the communication hole 46c of the rear coupling member 46 is exposed. In this state, the preliminary core 81 can be inserted into the one end 40c via the communication hole 46 c. In this case, the preliminary core 81 can be inserted into the one end 40c quickly and easily. The tip of the preliminary core 81 inserted into the one end portion 40c moves forward along the inclined portion 40e of the housing chamber 40a, and moves toward the jig 31 through the communication hole 44c of the front coupling member 44.

Next, a method for feeding the rod (preliminary core) 81 in the rod feeding device (mechanical pencil) 10 according to the present embodiment will be described.

When the user presses the pressing body (operation portion) 50 forward, the rear coupling member 46, the main body portion 42, and the front coupling member 44 of the preliminary core receiving member 40 move forward. When the front end of the front portion 44a of the front coupling member 44 abuts against the rear end of the clip 31, the clip 31 is pressed by the front coupling member 44 and moves forward. The present invention is not limited to this, and the flange portion 44b of the front connecting member 44 may be in contact with the rear end of the cylinder 32, so that the jig 31 is pushed forward through the cylinder 32.

When the jig 31 moves forward together with the fastener 33, the preliminary core 81 moves forward together with the jig 31. When the clip 31 moves further forward, the fastener 33 abuts against the inner section of the pen head 23, and the front portion of the clip 31 moves forward with respect to the fastener 33. Thereby, the front portion of the jig 31 is opened to the outside, and the front end of the preliminary core 81 passes through the front portion of the jig 31 and moves toward the slider 232.

When the user releases the pressing of the pressing body 50, the jig 31, the cylinder 32, the preliminary core receiving member 40, and the pressing body 50 are moved rearward by the elastic force of the coil spring 35. Thereby, the front portion of the jig 31 moves inward of the fastener 33, and abuts against the fastener 33 to hold the preliminary core 81.

By repeating this process, the preliminary core 81 is sent forward, and the front end of the preliminary core 81 passes through the front end member 232a and protrudes forward from the front end of the front end member 232 a. Thereby, the preliminary cartridge 81 becomes the writable cartridge 80.

After writing with the cartridge 80 is completed, or the like, the tip opening 23b may be pressed against the paper surface or the like while the pressing body 50 is pressed forward, whereby the cartridge 80 protruding forward from the tip opening 23b may be retracted to accommodate the cartridge 80. When the length of the lead 80 is shortened due to abrasion or breakage, the preliminary lead 81 may be positioned behind the lead 80, and the lead 80 and the preliminary lead 81 may be axially aligned. In the present embodiment, when the preliminary core 81 located at the rear of the pen core 80 retreats together with the pen core 80, even if the rear end of the preliminary core 81 deviates from the central axis, the rear end of the preliminary core 81 is guided by the inclined surface 46e so as to face the communication hole 46c. When the rear end of the preliminary core 81 is located in the communication hole 46c, the preliminary core 81 can move rearward in the communication hole 46c.

In the rod-shaped body feeding tool (mechanical pencil) 10 of the present embodiment, the housing chamber (core housing chamber) 40a includes one end portion 40c overlapping with the central axis of the rod-shaped body feeding tool (mechanical pencil) 10 and the other end portion 40d distant from the central axis, and the rod-shaped body feeding tool 10 has the communication hole 46c capable of supplying the rod-shaped body (refill, preliminary core) 81 to the one end portion 40c from the rear side without passing through the other end portion 40d.

According to the rod-shaped body feeding tool 10, the rod-shaped body 81 can be inserted into the one end 40c of the housing chamber 40a through the communication hole 46c. Therefore, the rod 81 can be quickly and easily inserted into the one end 40c without passing through the other end 40d of the housing chamber 40 a.

(embodiment 3)

Embodiment 3 of the present invention will be described with reference to fig. 21 to 28. In the following description and the drawings used in the following description, the same reference numerals as those used for the corresponding parts in embodiment 1 and embodiment 2 are used for the parts that can be configured similarly to embodiment 1 and embodiment 2, and overlapping descriptions are omitted.

Fig. 21 is an external view of an example of the rod-shaped body feeding tool (mechanical pencil) 10 in the present embodiment. Fig. 22 is a longitudinal sectional view of the rod-shaped body feeding device 10 corresponding to the line F-F. Fig. 23 is a cross-sectional view corresponding to the G-G line of fig. 22, fig. 24 is a cross-sectional view corresponding to the H-H line of fig. 22, and fig. 25 is a cross-sectional view corresponding to the I-I line of fig. 22. Fig. 26 is an exploded perspective view of a part of the rod-shaped body feeding instrument 10. Fig. 27 is a perspective view showing the front axle 21. Fig. 28 is a view showing the rod-like body feeding instrument 10 in a state where the rear shaft 22 is removed.

The shaft tube 20 of the present embodiment includes a front shaft 21, a rear shaft 22, a pen point 23, and a 1 st coupling member 24.

The front shaft 21 is a substantially cylindrical member having a central axis extending in the axial direction. An inner flange portion 21h protruding inward is provided at the rear end portion of the front shaft 21. By this inner flange portion 21h, the movement of the flange portion 46b of the rear coupling member 46 rearward is restricted. Thus, when the flange portion 46b abuts against the inner flange portion 21h, the rear coupling member 46 does not move further rearward relative to the front shaft 21.

The inner flange portion 21h is provided with a rear opening (opening) 21i. The rear opening 21i is a through hole penetrating the inner flange portion 21h in the axial direction. The flange portion 46b of the rear coupling member 46 is provided with a flange portion opening 46f. The flange opening 46f is a notch cut away from the outer edge of the flange 46b toward the radially inner side. The rear opening 21i may be a notch provided in the inner flange 21h, and the flange opening 46f may be a through hole penetrating the flange 46b in the axial direction. In cross section, the rear opening 21i and the flange portion opening 46f have a shape and a size capable of passing through at least 1 preliminary core 81. At least a part of the rear opening 21i and the flange opening 46f overlaps with the other end portion (outer peripheral portion) 40d of the core housing chamber 40a when viewed from the rear.

The rear shaft 22 is detachably attached to the rear coupling member 46. For example, the rear coupling member 46 is pressed into the rear shaft 22, whereby the rear shaft 22 is attached to the rear coupling member 46. The rear axle 22 may be attached by other means such as screwing and fitting with projections and depressions.

In the present embodiment, the same inclined surface 46e as in embodiment 2 is also provided on the front surface of the flange portion 46b of the rear coupling member 46 (see fig. 19 and 20).

In the present embodiment, the rear opening 21i of the front shaft 21 is exposed by detaching the rear shaft 22 from the rear coupling member 46 (see fig. 28). In this state, the preliminary core 81 can be inserted from the other end 40d of the rear core housing chamber 40a through the rear opening 21 i.

In the example shown in fig. 22, the central axis of the main body 46a of the rear coupling member 46 is offset from the central axis of the mechanical pencil 10. In particular, the center axis of the main body portion 46a is offset from the center axis of the mechanical pencil 10 on the opposite side of the rear opening 21i as viewed in the axial direction. With this, the central axes of the pressing body 50 and the erasing member 52 are also deviated from the central axis of the mechanical pencil 10. This can suppress interference of the main body 46a when the preliminary core 81 is inserted into the core housing chamber 40a through the rear opening 21 i. Therefore, the preliminary core 81 can be easily inserted into the core housing chamber 40a through the rear opening 21 i.

Next, a method for replenishing the rod (preliminary core) 81 to the rod feeding tool (mechanical pencil) 10 according to the present embodiment will be described.

In the state shown in fig. 21, the rear shaft 22 is detached from the rear coupling member 46. In the present embodiment, the rear shaft 22 is pulled rearward relative to the rear coupling member 46, whereby the rear shaft 22 is detached from the rear coupling member 46 (see fig. 28). Next, the preliminary core 81 is inserted from the other end 40d of the rear core housing chamber 40a through the rear opening 21i. Thereafter, the mechanical pencil 10 is rotated about the central axis, and the preliminary core 81 inserted into the other end portion 40d is moved toward the one end portion 40 c. The following operations are the same as those described in embodiment 2, and thus detailed description thereof is omitted. In the present embodiment, the rear coupling member 46 also has a communication hole 46c. Therefore, as in the example described in embodiment 2, the preliminary core 81 can be inserted into the one end 40c through the communication hole 46c.

In the rod-shaped body feeding instrument (mechanical pencil) 10 of the present embodiment, the housing chamber (core housing chamber) 40a includes one end portion 40c overlapping the central axis of the rod-shaped body feeding instrument (mechanical pencil) 10 and the other end portion 40d distant from the central axis, and the rod-shaped body feeding instrument 10 has an opening 21i through which the rod-shaped body (refill, preliminary core) 81 can be supplied from the rear to the other end portion 40 d.

According to the rod-shaped body feeding tool 10, even if the number of components is reduced, the preliminary core 81 can be easily replenished into the core housing chamber 40 a.

Claims (8)

1. A mechanical pencil, having:

a shaft cylinder;

a core feeding mechanism disposed in the shaft cylinder and having a jig for holding the pen core;

an operation unit that moves the jig forward; and

a preliminary cartridge housing portion disposed behind the jig, communicating with the jig, and housing a preliminary cartridge,

by operating the operation section, the core feed mechanism is operated to make the pen core protrude from the front end opening of the shaft barrel,

it is characterized in that the method comprises the steps of,

the preliminary core housing portion has a core housing chamber having a scroll-like shape in cross section, and the core housing chamber extends in an axial direction.

2. The mechanical pencil of claim 1, wherein the mechanical pencil comprises a mechanical pencil,

the mechanical pencil has a communication hole communicating with the holder at one end in a cross section of the core receiving chamber.

3. The mechanical pencil of claim 2, wherein the mechanical pencil comprises a mechanical pencil,

the mechanical pencil has an outer peripheral opening portion in an outer peripheral portion of the shaft barrel, the outer peripheral opening portion being capable of allowing the prepared pencil lead to enter and exit, and the other end portion in a cross section of the pencil lead housing chamber communicates with the outer peripheral opening portion.

4. The mechanical pencil of claim 3, wherein the mechanical pencil comprises a pair of mechanical arms,

a cover member for opening and closing the outer peripheral opening is disposed in the outer peripheral opening of the shaft tube.

5. The mechanical pencil of any one of claims 1 to 4, wherein,

the core housing chamber has a bottom portion located at a front end of the core housing chamber, the bottom portion having an inclined portion inclined from one end portion toward the other end portion in a cross section of the core housing chamber.

6. The mechanical pencil of any one of claims 1 to 5, wherein,

the core receiving chamber includes one end portion overlapping with a central axis of the mechanical pencil and the other end portion distant from the central axis,

the mechanical pencil has a communicating hole capable of supplying the lead to the one end portion from the rear side without passing through the other end portion.

7. The mechanical pencil of any one of claims 1 to 6, wherein,

the core receiving chamber includes one end portion overlapping with a central axis of the mechanical pencil and the other end portion distant from the central axis,

the mechanical pencil has an opening capable of providing the lead from the rear to the other end.

8. A rod-shaped body feeding device is provided with:

a shaft cylinder;

a feed mechanism disposed in the shaft tube and having a clamp for clamping the rod-like body;

an operation unit that moves the jig forward; and

a receiving portion disposed behind the jig, communicating with the jig, and receiving a prepared rod-like body,

by operating the operation unit, the feed mechanism is operated to protrude the rod-like body from the front end opening of the shaft tube,

it is characterized in that the method comprises the steps of,

the housing portion has a housing chamber having a shape of a vortex in a cross section, and extending in an axial direction.