KR0183307B1 - A mechanical pencile - Google Patents

Abstract

Disclosed is a mechanical pencil that can be used for a long time and is less likely to be lost. The disclosed mechanical pencil is a mechanical pencil that protrudes a sharp core stored in the mandrel out of the main body at regular intervals by holding the main body and pressing the inserted mandrel, wherein the mandrel includes a deep housing for storing the sharp seam and a deep housing. It is detachably fitted to one side of the, characterized in that it comprises an eraser housing capable of continuously projecting the eraser out of the eraser housing as opposed to the direction of the sharp core projecting. The sharp pencil employing an eraser housing having such a structure can use the eraser without fear of losing it for a long time.

Description

Sharp pencil with eraser usable for a long time

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sharp pencil, and more particularly, to a sharp pencil provided with an eraser which can be used for a long time and has no risk of loss.

Among the writing instruments using a conventional pencil lead, for example, the pencil pencil can be conveniently used only by replacing only the pencil lead, and the handwriting correction is relatively free, so that it is widely used. The use of an eraser is essential to correct the handwritten notes with such a pencil.

Referring to FIG. 1, a conventional mechanical pencil includes a deep housing 12 storing a sharp shim (not shown), and is coupled to one side of the deep housing 12 to push the sharp core in the longitudinal direction thereof. (14). A screw 14a is formed on an outer circumferential surface of the deep protrusion 14, and when the core rod 20 is fully inserted into the main body 30, the deep protrusion 14 is moved to one outside of the main body 30. By protruding and screwing the head 40, the mandrel 20 is completely fixed to the main body 30. When the mandrel 20 is fixed to the main body 30, a part of the mandrel 20 protrudes to the outside of the main body 30, and the lid 50 and the eraser 50 are accommodated therein. When 60 is inserted, the sharp pencil is completed. In this case, a needle bar 55 having a diameter smaller than that of the sharp core used to remove the sharp core blocked by the hole of the head 40 or the protruding portion 14 may be installed at the end of the eraser 50.

The mechanical pencil of such a structure can project the sharp core to the outside of the head 40 by holding the main body 30 by hand and pressing the lid 60 in the direction in which the sharp core protrudes with a finger.

However, in the mechanical pencil as described above, the eraser fitted to the mandrel 12 is small in size as shown in the drawing and is quickly consumed. In addition, there is a problem that often lost in the process of removing the eraser to put the sharp shim in the mandrel.

The present invention has been made to solve the above problems, and an object of the present invention is to provide a mechanical pencil with an eraser that can be used for a long time and has a low risk of loss.

1 is an exploded perspective view of a conventional mechanical pencil.

2 is an exploded perspective view of a mechanical pencil according to the first embodiment of the present invention.

3 is an exploded perspective view of an eraser housing employed in the sharp pencil shown in FIG. 2;

4 is a cross-sectional view along the line IV-IV 'of the mechanical pencil shown in FIG.

5 is an exploded perspective view of a sharp pencil according to a second embodiment of the present invention.

6 is an assembled perspective view of the mechanical pencil shown in FIG.

7 is an exploded perspective view of an eraser housing employed in the sharp pencil shown in FIG. 5.

8 is a cross-sectional view along the line VIII-VIII ′ of the mechanical pencil shown in FIG. 6.

FIG. 9 is a sectional view along the line IX-IX 'of the eraser housing shown in FIG. 7; FIG.

Name of the main parts of the drawing

130, 530 ... main body 140, 540 ... head

150 ... Eraser Support 155 ... Button

160 ... eraser 165, 565 ... pipe member

165a ... long 165b ... jamming

168 ... spring 170, 570 ... eraser housing

180 ... deep protrusion 180a, 580a ... thread

190, 590 ... deep housing 200, 600 ... mandrel

260, 660 ... lid 255, 655 ... needle

530a ... first guide groove 545 ... first rotating member

545a ... first guide protrusion 545b ... hook portion

545c ... nut portion 550 ... second rotating member

550a ... 2nd guide protrusion 550c ... bolt part

565 ... pipe member

In order to achieve the above object, the mechanical pencil according to the first embodiment of the present invention, by pressing the mandrel inserted into the main body to project the sharp core stored in the mandrel out of the main body at regular intervals. In the mechanical pencil, the mandrel, a deep housing for storing the sharp shim; It is characterized in that it comprises an eraser housing which is detachably fitted to one side of the deep housing, and which can continuously project the eraser out of the eraser housing as opposed to the sharp direction of the sharp core.

In the present invention, the eraser housing, the eraser having a predetermined length; A pipe member into which the eraser is retractably fitted; Eraser support means that is accommodated in the pipe member to support the eraser and at the same time continuously project the eraser to the outside of the eraser housing; preferably comprises a. In the present invention, the eraser housing, the eraser having a predetermined length; A pipe member into which the eraser is retractably fitted; A first rotating member rotatably coupled to the pipe member; The eraser is housed in the pipe member so as to be supported, and is screwed with the first rotating member to rotate clockwise or counterclockwise with respect to the first rotating member, thereby extending the length of the pipe member within the pipe member. It is preferable to include; a second rotating member which is moved to.

Hereinafter, the mechanical pencil according to the first embodiment of the present invention will be described in detail with reference to the drawings.

2 and 4, the mechanical pencil according to the present invention includes a deep housing 190 storing a sharp shim (not shown) and an eraser housing 170 detachably fitted to one side of the deep housing 190. It includes a mandrel 200 made of, and is coupled to the other side of the deep housing 190 includes a core protrusion 180 for pushing the sharp core at regular intervals in the longitudinal direction thereof. The outer circumferential surface of the deep protrusion portion 180 is formed with a screw portion 180a, which is protruded to one side of the main body 130 by the core rod 200 being completely inserted into the main body 130. The head 140 is fixed to the main body 130 by being screwed to the head 140 here. When the lid 260 is inserted into the eraser housing 170 partially protruding to the outside of the main body 130, the mechanical pencil is completed. In this case, the eraser housing 170 may be provided with a needle bar 255 having a diameter smaller than that of the sharp core used to remove the sharp core blocked by the hole of the head 140 or the deep protrusion 180.

The eraser housing 170 fitted into the deep housing 190 includes an eraser 160 having a predetermined length, a pipe member 165 into which the eraser 160 is retractably mounted, and the pipe member 165. It includes an eraser support means 150 that is accommodated in the inside and to support the eraser 160 and to move in the longitudinal direction within the pipe member 165.

The pipe member 165 has a long hole 165a formed in the longitudinal direction thereof, and a plurality of locking jaws 165b protrude from the inner circumferential surface of the long hole 165a.

As shown in FIG. 4, the eraser supporting means 150 is provided with a button 155 that can be protruded from the side surface thereof, and when the button 155 protrudes, a locking step 165b of the long hole 165a. ) To avoid being pushed. When the button 155 protrudes from the side surface of the eraser supporting means 150 and is fitted to the locking jaw 165b, the button 155 has a shape corresponding to the locking jaw 165b so that the eraser supporting means 150 is fixed. Doing. In addition, a spring 168 for applying an elastic bias to protrude the button 155 is accommodated in the eraser supporting means 150. Therefore, when the button 155 protrudes from the side surface of the eraser support means 150, the eraser support means 150 is fixed to the pipe member 165, the finger or nail (not shown) When the button 155 is pressed down and recessed under the side surface of the eraser supporting means 150, the eraser supporting means 150 can move inside the pipe member 165. Here, the spring 168 used a coil spring, but if the same effect is the shape is not limited by this embodiment.

Referring to the operation of the mechanical pencil of such a structure as follows.

In order to protrude the eraser 160 from the eraser housing 170, the eraser housing 170 is separated from the main body 130, and then, as shown in FIG. While pressing the arrow, the eraser support means 150 may be pushed in the direction in which the eraser protrudes. When the eraser 160 is sufficiently protruded, when the finger 150 is released from the button 150, the button 150 is lifted from the side surface of the eraser supporting means 150 by the spring 168 and inserted into the locking jaw 165b. Thus, the eraser housing 170 is fixed to the pipe member 165.

In order to store the sharp shim in the mechanical pencil, the eraser housing 170 is separated from the main body 130, and then the sharp shim is inserted into a hole (not shown) of the main body 130 from which the eraser housing 170 is removed. Put it in.

Next, a mechanical pencil according to a second embodiment of the present invention will be described in detail with reference to the drawings.

5 and 7, the mechanical pencil according to the present invention includes a deep housing 590 for storing a sharp shim (not shown) and an eraser housing 570 detachably fitted to one side of the deep housing 590. It comprises a core rod 600 made of, and coupled to the other side of the deep housing 590 includes a core protrusion 580 for pushing the sharp core at regular intervals in the longitudinal direction thereof. The outer circumferential surface of the deep protrusion 580 is formed with a threaded portion 580a. The threaded portion 180a is provided to the outside of the main body 530 by the core rod 600 being completely inserted into the main body 530. By protruding and screwing the head 540 here, the core rod 600 is fixed to the main body 530. When the lid 660 is inserted into the eraser housing 570 that partially protrudes to the outside of the main body 530, the mechanical pencil is completed. In this case, the eraser housing 570 may be provided with a needle bar 655 having a diameter smaller than that of the sharp core used to remove the sharp core blocked by the hole of the head 540 or the deep protrusion 580.

An eraser housing 570 fitted to the deep housing 590 is rotatable to an eraser 560 having a predetermined length, a pipe member 565 to which the eraser is mounted, and a rotatable to the pipe member 565. It includes a first rotating member 545 coupled to. In addition, the pipe is accommodated in the pipe member 565 to support an eraser, and screwed with the first rotating member 545 to rotate the clockwise or counterclockwise direction with respect to the first rotating member 545. The second rotating member 550 is moved in the longitudinal direction inside the member 565.

Here, two first guide grooves 530a are formed in the inner circumferential surface of the main body in the longitudinal direction, as shown in FIG. 8. Since the first guide protrusion 545a protruding from the outer circumferential surface of the first rotating member 545 is fitted into the first guide groove 530a, the first rotating member 545 is rotated with respect to the main body 530. Is prevented.

As shown in FIG. 9, a second guide groove 565a is formed in the inner circumferential surface of the pipe member 565 in the longitudinal direction thereof. A second guide protrusion 550a protruding from the outer circumferential surface of the second rotating member 550 is inserted into the second guide groove 565a to prevent rotation inside the pipe member 565 and at the same time, the second guide groove 565a. ) Along the longitudinal direction of the pipe member 565. On the other hand, the inner peripheral surface of one end of the pipe member 565 is formed with a circumferential groove 565b formed around the radial direction in which the hook portion 545b of the first rotating member 545 to be described later is fitted.

The first rotating member 545 has a hook portion 545b that can be rotatably fitted into the circumferential groove 565b. The first rotating member 545 may be rotated without being separated from the pipe member 565 by fitting the hook portion 545b into the circumferential groove 565b. In this embodiment, the hook portion is formed in the first rotating member, and the circumferential groove into which the hook portion is fitted is formed in the pipe member, but the order is reversed so that the same effect is obtained even when the hook portion is formed in the pipe member and the circumferential groove is formed in the first rotating member. Can be obtained. Meanwhile, a nut part 545c to which the bolt part 550c of the second rotating member 550 will be screwed is formed at the center of the hook part 545b. In addition, a needle bar 655 having a diameter smaller than that of the sharp core used to remove the sharp core blocked by the hole of the head 540 or the deep protrusion 580 of the mechanical pencil may be installed.

A second guide protrusion 550a fitted into the second guide groove 565a of the pipe member 565 is formed in the second rotating member 550. One end of the eraser 560 is fitted to the second rotating member 550, and the second rotating member 550 is moved from the pipe member 565 as the second rotating member 550 moves in the pipe member 565.

Referring to the operation of the mechanical pencil of such a structure as follows.

In order to protrude the eraser 560 from the eraser housing 570, the eraser housing 570 is held by hand and separated from the main body 530, and then the first rotating member 545 or the pipe member 565. By rotating the relative to each other, the second rotating member 550 inside the pipe member 565 moves in the longitudinal direction inside the pipe member 565. That is, since the bolt portion 550c formed on the second rotating member 550 rotates with respect to the nut portion 545c of the first rotating member 550, the bolt portion 550c moves in the longitudinal direction in the pipe member 565. . In addition, even if the eraser housing 570 is not separated from the mechanical pencil, the lid 560 is removed, and then the pipe member 565, which is partially protruded with respect to the main body 530, is rotated. I can make it.

In order to store the sharp shim in the mechanical pencil, the eraser housing 570 may be separated from the main body 530, and then the sharp shim may be inserted into the hole of the main body 530 from which the eraser housing 570 has been removed.

As mentioned above, the sharp pencil of this invention does not need to prepare an eraser separately by providing the eraser housing which fits in a deep housing.

In addition, since the eraser housing must be fitted in the deep housing so that the sharp shim can protrude from the head, it is less likely to be inadvertently lost.

On the other hand, the mechanical pencil is implemented by manufacturing only the eraser housing separately and cutting a part of the conventional sharp pencil core rod, it can be easily produced without large structural changes.

Claims (8)

In the mechanical pencil which projects the sharp core stored in the mandrel out of the main body at regular intervals by pressing the mandrel inserted into the main body, The mandrel, Deep housing for storing sharp shims; And an eraser housing detachably fitted to one side of the deep housing and capable of continuously projecting the eraser out of the eraser housing as opposed to the sharp direction of the sharp core. The method of claim 1, The eraser housing may include an eraser having a predetermined length; A pipe member into which the eraser is retractably fitted; And an eraser support means housed in the pipe member to support the eraser and to continuously protrude the eraser to the outside of the eraser housing. The method of claim 2, The pipe member has a long hole formed with a plurality of locking jaws in the longitudinal direction at its side, The side of the eraser support means can be indented into the inside, the pencil is characterized in that the button is installed so as not to be pushed into the locking jaw of the long hole when protruding. The method of claim 3, The eraser support means further comprises an elastic means for elastically biasing the button therein. The method of claim 3, The pipe member is a mechanical pencil, characterized in that it further comprises a needle of a smaller diameter than the sharp core used for drilling the sharp core blocked in the main body. The method of claim 1, The eraser housing, An eraser having a predetermined length; A pipe member into which the eraser is retractably fitted; A first rotating member rotatably coupled to the pipe member; The eraser is housed in the pipe member so as to be supported, and is screwed with the first rotating member to rotate clockwise or counterclockwise with respect to the first rotating member, thereby extending the length of the pipe member within the pipe member. A second pencil is moved to; Sharp pencil, characterized in that it comprises a. The method according to claim 1 or 6, At least one first guide groove recessed in the longitudinal direction is provided on the inner circumferential surface of the main body, The outer circumference of the first rotating member has a first guide protrusion which is inserted into the first guide groove and movable in the longitudinal direction of the main body, At least one second guide groove recessed in the longitudinal direction is provided on an inner circumferential surface of the pipe member. Sharp pencil, characterized in that the outer circumference of the second rotating member has a second guide projection which is inserted into the second guide groove and movable in the longitudinal direction of the pipe member. According to claim 7, One end of the pipe member or one end of the first rotating member has a hook portion protruding therefrom, The other end of the pipe member or one end of the first rotating member has a circumferential groove that the hook portion is rotatably fitted, The pencil portion is formed in the center of the first rotating member and the bolt portion for screwing the nut portion is formed in the center of the second rotating member.