JP2006297756A - Mechanical pencil with stylus pen - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mechanical pencil with a thin or flexible and another stylus pens. <P>SOLUTION: In the mechanical pencil equipped with a lead delivering mechanism 14 and a lead tank T provided within a barrel 12, a lead inserting port communicating with the rear part of the lead tank T is sealed by a detachable tank lid-cum-stylus tip 40 constituting a pen point P1 of a stylus. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a mechanical pencil with a stylus pen attached with a stylus pen.

  Conventionally, what was described in patent document 1 is known as a mechanical pencil with this kind of stylus pen. This document describes a mechanical pencil lead feeding mechanism slidably provided in a shaft cylinder, a ball pen refill provided behind the lead feeding mechanism, a ball pen refill and a lead feeding mechanism. This is a composite writing instrument composed of cooperating means for interlocking and a stylus pen serving as a cap for operating a refill receiver receiving a ballpoint refill and projecting a lead by a lead feeding mechanism.

  That is, in the above composite writing instrument, the stylus pen also serves as a cap for the ballpoint pen refill, and the stylus tip is fixed to the tip of the cap. Therefore, it can be used as a mechanical pencil with the cap attached and one side of the shaft cylinder facing downward, and centering is performed by rotating the cap with respect to the shaft cylinder. On the other hand, it can be used as a stylus pen by making the other side of the shaft cylinder face downward. Moreover, it can be used as a ballpoint pen by removing the cap.

JP 2003-312190 A

  However, such a conventional configuration has a problem that the diameter of the stylus tip cannot be sufficiently reduced because the stylus pen is also used as a cap, although the shaft cylinder has a small diameter. Therefore, there is a problem that it is difficult to use when the stylus pen is moved delicately or when the stylus pen is moved flexibly.

  The present invention has been made in view of such problems, and an object thereof is to provide a mechanical pencil with a small-diameter or flexible stylus pen.

In order to achieve the above object, the invention according to claim 1 of the present invention is a mechanical pencil comprising a lead feeding mechanism and a lead tank provided in a shaft cylinder.
A lead insertion port communicating with the rear portion of the lead tank is sealed with a removable tank lid, and the tank lid constitutes a stylus pen nib.

  According to a second aspect of the present invention, in the first aspect of the present invention, the apparatus further comprises a detachable cap that surrounds the tank lid, and the cap constitutes a second stylus pen nib.

  According to a third aspect of the present invention, in the second aspect of the present invention, the stylus pen nib is more flexible than the second stylus pen nib.

  According to a fourth aspect of the present invention, in the apparatus according to any one of the first to third aspects, the driving mechanism for driving the core feeding mechanism is further provided, and the driving mechanism is integrated from the rear side of the shaft cylinder. The tank lid is included in the drive mechanism that is the unit.

  According to a fifth aspect of the present invention, a rotary cam mechanism for advancing the chuck of the core feeding mechanism is formed between the drive mechanism and the core feeding mechanism according to the fourth aspect by relative rotation with respect to the shaft cylinder. It is characterized by.

  According to the present invention, since the tank lid for sealing the lead tank constitutes the stylus pen nib, it can be a stylus pen nib having a smaller diameter than the conventional stylus pen nib, Since it can be moved delicately or moved flexibly and also functions as a tank lid, an increase in the number of parts can be suppressed.

  According to the invention described in claim 2, since the cap constitutes the second stylus pen nib, the stylus pen nib of two types different from the stylus pen nib can be provided and used. The pen tip for the stylus pen can be switched according to the situation.

  According to the third aspect of the present invention, the stylus pen nib constituted by the tank lid is normally surrounded by the cap and protected by the cap, so that the flexibility can be increased. Therefore, when it is desired to use the nib flexibly, a stylus nib composed of a tank lid can be used.

  According to the fourth aspect of the invention, by including the tank lid in the drive mechanism as a unit, the tank lid can be set only by inserting the drive mechanism into the shaft cylinder.

  According to the fifth aspect of the present invention, since the chuck of the core feeding mechanism moves forward by the relative rotation with respect to the shaft cylinder, the driving operation and the stylus pen nib are performed even if the tank lid constitutes the stylus pen nib. Will not interfere with the writing operation.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is an overall view of a mechanical pencil with a stylus pen of the present invention, and FIG. 2 is a longitudinal sectional view thereof. The mechanical pencil 10 with a stylus pen includes a shaft cylinder 12. The shaft cylinder 12 in this embodiment has a small diameter and an outer diameter of 3 to 8 mm, preferably 5 mm or less, and is a single shaft made of metal.

  A core feeding mechanism 14 is disposed in the shaft cylinder 12. The core feeding mechanism 14 is a unit, and can be set in the shaft cylinder 12 by being inserted into the shaft cylinder 12 from the front and fixed.

  Specifically, the lead feeding mechanism 14 includes a lead pipe 16 that can accommodate a lead, a chuck 18 that is integrally connected to a front end of the lead pipe 16 and a rear end extension portion, and tightens the lead. 18 is inserted between the sleeve 22 and the core pipe 16. The chuck ring 20 is fitted on the outer peripheral side of the sleeve 18, the sleeve 22 is in contact with the rear end of the chuck ring 20 and restricts the rearward displacement of the chuck ring 20. A chuck spring 24 that urges the core pipe 16 and the chuck 18 backward, a tip 26 that is screwed to the front end of the sleeve 22, and a packing 28 that is housed in the tip 26 and holds the lead. The

  The meshing portion formed on the outer peripheral surface of the sleeve 22 is adhesively press-fitted into the shaft cylinder 12, whereby the core feeding mechanism 14 is fixed to the shaft cylinder 12.

  As shown in FIG. 6, the core pipe 16 has a rib 16a formed on its peripheral surface, and the rib 16a is slidably fitted into a groove 22a (see FIG. 2) formed in the sleeve 22. Thus, the core pipe 16 is attached so as to be axially movable and non-rotatable within the shaft cylinder 12. A rotating cam receiving portion 16 b that engages with a rotating cam 32 described later is formed on the peripheral surface of the core pipe 16. As shown in FIG. 10, two types of inclined surfaces 16 b 1 and 16 b 2 having opposite directions of inclination are formed continuously on the rotating cam receiving portion 16 b. A locking recess 16b3 is formed at the end of the inclined surface 16b2.

  A drive mechanism 30 for driving the core feeding mechanism 14 is disposed in the shaft cylinder 12. The drive mechanism 30 is also a unit, and can be set in the shaft tube 12 by being inserted into the shaft tube 12 from behind and fixed.

  Specifically, the drive mechanism 30 includes a rotating cam 32, a tail plug 34 connected to the rotating cam 32, a metal sleeve 36 between the rotating cam 32 and the tail plug 34, and rotation with the sleeve 36. A plastic ring 38 for smooth rotation with the cam 32 and a stylus tip 40 also serving as a tank lid detachably provided on the tail plug 34 are configured.

  The engagement mechanism formed on the outer peripheral surface of the sleeve 36 is adhesively pressed into the shaft cylinder 12, whereby the drive mechanism 30 is fixed to the shaft cylinder 12. At this time, a rotating cam mechanism described later is configured between the rotating cam 32 of the drive mechanism 30 and the core pipe 16 of the core feeding mechanism 14.

  The rotating cam 32, the tail plug 34, and the sleeve 36 are assembled as follows. As shown in FIG. 7, the rotary cam 32 is formed with a cam projection 32a projecting forward at the tip, and the rear end is a reduced diameter portion 32b, and the reduced diameter portion 32b. An engagement hole 32c and an introduction hole 32d aligned with the engagement hole 32c in the circumferential direction are formed. As shown in FIG. 8, the tail plug 34 is formed with an engagement protrusion 34a at the tip thereof and a hole 34b at a position displaced in the circumferential direction from the engagement protrusion 34a, and is aligned with the engagement protrusion 34a in the circumferential direction. A second engagement protrusion 34c is formed at the position where the above-described operation is performed. A third engagement protrusion 34d is formed at the rear end of the tail plug 34.

  As shown in FIG. 9A, the reduced diameter portion 32b of the rotating cam 32 is inserted into the ring 38 and the sleeve 36, and then, as shown in FIG. 34a is aligned with the introduction hole 32d, and the tip portion is inserted into the reduced diameter portion 32b. Then, while reducing the hole 34b, the engagement protrusion 34a is locked to the engagement hole 32c, and the second engagement protrusion 34c is fitted to the introduction hole 32d. As a result, the rotary cam 32 and the tail plug 34 are integrally connected to the sleeve 36 so as to be relatively rotatable with the sleeve 36 interposed therebetween (FIG. 9C).

  The stylus tip 40 constitutes a tank lid that is detachably inserted into the rear end portion of the tail plug 34. The tank lid is made of an integral part made of plastic, but may be made of a plurality of members. The protruding end of the stylus tip 40 from the tail plug 34 constitutes a stylus nib P1 (see FIG. 3), and the stylus nib P1 extends long from the rear end of the tail plug 34. Since it is a space, its flexibility is large and soft.

  A cap 44 is detachably attached to the tail plug 34. The cap 44 includes a cap body 46, a stylus tip 48, and a metal clip 50. The stylus tip 48 is press-fitted into the rear end portion of the cap body 46 or is integrally formed with the cap body 46 by two-color molding to constitute a stylus nib P2 (see FIG. 1).

  An engagement groove 46a (see FIG. 3) that fits with the third engagement protrusion 34d of the tail plug 34 is formed on the inner peripheral surface of the cap body 46, and is engaged when the cap 44 is attached. By fitting the third engagement protrusion 34d in the groove, the cap 44 and the tail plug 34 are connected to rotate integrally.

  The space of the core tank T is formed in the shaft cylinder 12 by the internal space of the core pipe 16 and the rotary cam 32, and the core tank T further communicates with the internal space of the tail plug 34, and the tail plug 34. The rear end portion serves as a core insertion port, and the core insertion port is detachably sealed by a tank lid formed of a stylus chip 40.

  The mechanical pencil with a stylus pen configured as described above can be used as a normal mechanical pencil by writing with the tip 26 of the shaft cylinder 12 facing downward. When extending the lead, the cap 44 is rotated with respect to the shaft cylinder 12. As a result, the relative rotation of the cap 44 is transmitted to the rotary cam 32 via the tail plug 34. The cam projection 32a of the rotating cam 32 rotates with respect to the rotating cam receiving portion 16b of the core pipe 16 that has become unable to rotate within the shaft cylinder 12.

  FIG. 10 is a development view showing the operation of the rotating cam mechanism constituted by the cam projection 32 a of the rotating cam 32 and the rotating cam receiving portion 16 b of the core pipe 16. Under normal conditions, the cam protrusion 32a is in contact with the most recessed portion of the rotating cam receiving portion 16b as shown by the solid line by the biasing force of the chuck spring 24. By rotating the cap 44, the cam protrusion 32a moves along one of the inclined surfaces 16b1 and 16b2, and thereby the lead pipe 16, the chuck 18 and the chuck ring 20 move forward to carry out the lead. Even if the cap 44 is rotated in any rotation direction, the cam protrusion 32a can follow the inclined surfaces 16b1 and 16b2, so that the core can be extended. However, the cap moves along the inclined surface 16b2 to the locking recess 16b3. Then, since the cam protrusion 32a is locked, the chuck 18 can be moved forward and held in a state where the lead is released, so that the lead that has been fed out can be retracted.

  When refilling the lead, as shown in FIGS. 4 and 5, when the cap 44 and the stylus tip 40 are removed, the lead insertion port of the lead tank is opened, so that the lead L can be inserted into the lead tank. It becomes possible.

  Next, when used as a stylus pen, the side opposite to the tip 26 of the shaft cylinder 12 is set downward. At this time, in this embodiment, as shown in FIG. 3, a method of using the stylus nib P2 of the stylus tip 48 provided on the cap 44 with the cap 44 attached as shown in FIG. Any method of removing the cap 44 and using the stylus nib P1 of the stylus tip 40 can be used. The stylus nib P2 is the same as that shown in Patent Document 1, and therefore, its average outer diameter is thick and functions as a part of the cap 44. Therefore, the material has a high hardness and is flexible. The nature is small. On the other hand, the stylus nib P1 has a thin average outer diameter, is usually surrounded by a cap 44 and protected by the cap 44, and also functions as a tank lid of the core tank T. Because it is soft and the inside is a cavity, flexibility is great. Therefore, the stylus pen tip P1 can be used when the stylus pen is to be moved delicately and precisely according to the situation to be used, or when the stylus pen is to be moved flexibly.

  For example, such a stylus pen can be used to select options that are developed on a small screen, such as a mobile phone display, or to write on a screen.

  Thus, three types of usage can be used as a mechanical pencil and two types of stylus pens. Further, since the stylus nib P1 is also used as a tank lid of the lead tank T, the number of parts can be reduced. Since the stylus nib P1 is surrounded and protected by the cap 44 when not in use, the stylus nib P1 can be prevented from being damaged even if it is highly flexible and does not interfere with the operation of the rotating cam mechanism.

1 is an overall view of a mechanical pencil with a stylus pen of the present invention. It is a longitudinal cross-sectional view of the mechanical pencil with a stylus pen of the present invention. It is a general view in case the mechanical pencil with a stylus pen of the present invention is used as a stylus pen. It is a general view when the core of the mechanical pencil with a stylus pen of the present invention is replenished. It is a longitudinal cross-sectional view when replenishing the core of the mechanical pencil with a stylus pen of the present invention. (A) is a top view of the core pipe of the mechanical pencil with a stylus pen of this invention, (b) is the longitudinal cross-sectional view seen along the 6b-6b line. (A) is a top view of the rotating cam of the mechanical pencil with a stylus pen of this invention, (b) is the longitudinal cross-sectional view seen along the 7b-7b line. (A) is a side view of the tail plug of the mechanical pencil with a stylus pen of the present invention, and (b) is a longitudinal sectional view. It is a longitudinal cross-sectional view showing the assembly procedure of a rotating cam, a tail plug, and a sleeve. It is an expanded view showing an effect | action of the rotation cam mechanism which consists of the rotation cam receiving part of a core pipe, and the cam protrusion of a rotation cam.

Explanation of symbols

10 Mechanical Pencil with Stylus Pen 12 Shaft Cylinder 14 Core Feeding Mechanism 16 Core Pipe 30 Drive Mechanism 40 Stylus Tip (Tank Cover)
44 Cap T core tank P1 Stylus nib P2 Stylus nib

Claims (5)

In a mechanical pencil comprising a lead feeding mechanism and a lead tank provided in the shaft cylinder,
A mechanical pencil with a stylus pen, characterized in that a lead insertion port communicating with the rear part of the lead tank is sealed with a detachable tank lid, and the tank lid constitutes a stylus pen nib.   The mechanical pencil with a stylus pen according to claim 1, further comprising a detachable cap that surrounds the tank lid, wherein the cap constitutes a second stylus pen nib.   3. The mechanical pencil with a stylus pen according to claim 2, wherein the stylus pen nib is more flexible than the second stylus pen nib.   A drive mechanism for driving the core feeding mechanism is further provided. The drive mechanism constitutes a unit that is integrally inserted from the rear of the shaft cylinder, and the tank lid is included in the drive mechanism that is the unit. The mechanical pencil with a stylus pen according to any one of claims 1 to 3.   5. The sharp with a stylus pen according to claim 4, wherein a rotary cam mechanism for advancing a chuck of the core feeding mechanism by a relative rotation with respect to the shaft cylinder is formed between the driving mechanism and the core feeding mechanism. Pencil.

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