KR20110006279A - Sharp core control sharp which uses atmospheric pressure - Google Patents

Abstract

The present invention relates to a sharp pencil, and more particularly, by forming a shim adjusting device on the upper case of the sharp shim to freely adjust the length of the sharp shim that comes out when pressing the pressure port to break the sharp shim during writing to interfere with writing It is related to the sharp pencil which prevented it.

That is, when the sharp shim is sent out and the pressurizing device 80 is pressed therein, the chuck 60 and the sleeve 42 which send the sharp shim to the outside while moving forward are moved by a predetermined distance, and serve as a stopper to stop. A tip cap 10 having a jaw 11 formed thereon, a case 20 fastened to the tip cap 10, and a protrusion 21 formed at an upper end thereof, and a protrusion formed on the case 20. The groove 31 is formed to correspond to the 21 and the outer shape is formed in a cylindrical shape, the inner side of the sharp shim adjusting device 30 is formed in a hexagonal shape, and the inside of the sharp shim adjusting device 30 is fastened to one side of the sharp shim It is formed in a hexagonal shape so as to correspond to the inner shape of the adjusting device 30, the other side is sharp end at the end when the threaded portion 41 is formed to be fastened to the threaded portion 12 formed inside the tip cap 10 After the chuck 60 to send the outside to send the sharp shim Sleeve 42 for the detent action when the

The slider 40 is formed, and the core tube 50 is formed to keep the sharp core inside the slider 40, and has a restoring force to return to the original position after receiving the chuck 60 and pressure to send the sharp core to the outside. It is characterized in that the spring 70 is provided to be fastened.

Tip cap, locking jaw, slider, sleeve.

Description

Sharp core control Sharp which uses atmospheric pressure}

The present invention relates to a sharp pencil, and more particularly, by forming a shim adjusting device on the upper case of the sharp shim to freely adjust the length of the sharp shim that comes out when pressing the pressure port to break the sharp shim during writing to interfere with writing It is related to the sharp pencil which prevented it.

In general, a pencil pencil is formed in the lower part of the casing by passing the narrowing part of the lower end of the inner tube as the inner pencil, which is supported by a spring, is elastically lifted each time the thin pencil core is placed in the inner tube and the pressing hole formed on the upper casing is pressed. It is pushed out slightly through the cap. Therefore, as the pencil lead is worn out, simply press the pressure port, and the pencil lead is pushed out through the cap of the lower part of the casing so that it is very convenient to use. It is to be pushed out little by little through the cap.

It is very convenient. By the way, the conventional mechanical pencil, as shown in FIG. 4, since the length of the sharp core coming out through the tip cap 1 is set from the manufacturing stage, the mechanical pencil of the short setting requires pressing the pressure port 2 more than twice. This has been a hassle, the mechanical pencil is set long because the length of the pencil is too long, the problem is broken. Therefore, in general, when adjusting the length of the shim, press the pusher (2) two times or more to come out of the shim, and then press the pusher again while pushing or pulling the sharp shim as a hand other than the hand holding the sharp pencil. come. As the length of the seam is to be adjusted as described above, when the writing of the seam is cumbersome and hasty, adjusting the length of the seam as described above causes a problem in that the handwriting becomes insane.

The sharp pencil of the present invention has been devised in view of the above problems, by forming a shim adjusting device on the upper case of the sharp shim so as to freely adjust the length of the sharp shim coming out when pressing the pressure port, the sharp shim is broken during writing. The purpose is to provide a sharp pencil that prevents disturbances.

The sharp pencil and the slider are integrally formed on the inner side of the case which is fastened to one side of the tip cap through which the sharp shim is sent out, and the case is screwed with the case to rotate the case so that the slider moves forward and backward along the thread inside the case. The sharp shim can be adjusted.

As described above, the sharp pencil of the present invention forms a shim adjusting device on the upper case of the sharp shim so as to freely adjust the length of the sharp shim that comes out when the pressurizing port is pressed. It is a useful invention.

Hereinafter will be described with reference to the accompanying drawings, the mechanical pencil of the present invention.

Figure 1 is an exploded perspective view showing a sharp pencil of the present invention, the case 20 is fastened to one side of the front end cap 10 to which the sharp shim is sent out, and the sharp shim while advancing when pressing the pressure port 80 inside The catching jaw 11 serving as a stopper is formed to stop the chuck 60 and the sleeve 42 to be discharged to the outside of the tip gap 10 and then stop by a predetermined distance. A protrusion 21 is formed at an upper end of the case 20 which is fastened to the front end cap 10, and the sharp core adjusting device 30 having the groove 31 formed therein is fastened to correspond to the protrusion 21. The outer shape of the sharp shim adjusting device 30 is formed in a cylindrical shape, the inner side is formed in a hexagonal shape. 6 inside the sharp shim adjusting device 30 so that one side corresponds to the inner shape of the sharp shim adjusting device 30. Formed into a square shape

, The other side is formed with a screw portion 41 to be fastened to the threaded portion 12 formed on the inner side of the end cap 10, the chuck 60 and the sleeve 42 to send the sharp core to the outer end at the end of the sharp core The slider 40 is formed with a sleeve 42 that stops when the retracted product is retracted after being sent out. The inner barrel of the slider 40 is formed with a core barrel 50 to store the sharp core, the chuck 60 for sending the sharp core to the outside and the spring 70 to provide a restoring force to return to the original position after receiving the pressure It is fastened. Figure 2a, 2b, 2c, 2d is a cross-sectional view showing the operating state of the mechanical pencil of the present invention, while rotating the sharp shim adjusting device 30 formed on the upper portion of the case 20 while rotating the slider 40 formed on the inside You will move forward. When the slider 40 is moved forward, the chuck 60 and the sleeve 42 meshed with the inner side of the core barrel 50 are moved forward at the same time. Accordingly, the chuck 50 and the sleeve 42 and the tip cap ( The distance L2 of the locking step 11 formed at 10 is shortened at the initial distance L1. The distance between the chuck 60 and the sleeve 42 and the locking step 11 is to be the length of the sharp shim discharged to the outside of the front end cap (10).

When the pressure port 80 is pressed, the chuck 60 and the sleeve 42 are advanced, and the sharp shim that is bitten by the chuck 60 is discharged to the outside of the tip cap 10. The sleeve 42 of the chuck 60 and the sleeve 42 advanced in the above cannot be moved further by the locking jaw 11 formed in the tip cap 10.

On the other hand, the chuck 60 is moved forward more than the sleeve 42, the chuck 60, which was pressed by the sleeve 42 to pressurize the sharp core, can no longer press the sharp core as the pressure is removed, Accordingly, the sharp shim is no longer discharged to the outside of the tip cap (10). When the pressure applied to the pressure port 80 is removed, the chuck 60 and the sleeve 42 retreat back to the spring 70. When the sharp shim adjusting device 30 is turned in the opposite direction, the distance between the chuck 60 and the sleeve 42 and the catching jaw 11 formed on the tip cap 10 increases, and thus the length of the sharp shim sent out to the outside becomes longer. Will be. 3A and 3B are cross-sectional views showing another embodiment of the present invention pencil pencil, the sharp shim adjusting device 30 and the slider 40 on the inside of the case 20 is fastened to one side of the tip cap 10 to which the sharp shim is sent out. Is integrally formed and screwed to the case 20

When the case is rotated as an image, the slider 40 moves forward and backward along the threaded portion 22 inside the case 20 so that the length of the sharp core can be adjusted.

1 is an exploded perspective view showing a mechanical pencil of the present invention,

Figure 2a, 2b, 2c, 2d is a cross-sectional view showing the operating state of the mechanical pencil of the present invention,

3a and 3b is a cross-sectional view showing another embodiment of the mechanical pencil of the present invention,

Figure 4 is a cross-sectional view showing a conventional mechanical pencil.

<Explanation of symbols for the main parts of the drawings>

10: Tip cap 11: Hanging jaw

12: screw part

20: case 21: protrusion

30: shim adjustment device 31: groove

40: slider 41: screw portion

42: sleeve 50: core pain

60: Chuck 70: Spring

80: pressure port

Claims (2)

When the sharp shim is sent out and the pressurizing port 80 is pressed therein, the jaw that serves as a stopper so that the chuck 60 and the sleeve 42 which sends the sharp shim to the outside and stop after moving by a predetermined distance ( 11 is formed a front end cap 10, the case 20 is fastened to the front end cap 10, the projection 21 is formed on the upper end, and the projection 21 formed in the case 20 Groove 31 is formed so as to correspond to the, and the inside of the sharp shim adjusting device 30 is formed in a hexagonal shape, and the inside of the sharp shim adjusting device 30 is fastened to one side and the inner shape of the sharp shim adjusting device 30 and It is formed in a hexagonal shape to correspond to, the other side is formed with a screw portion 41 to be fastened to the threaded portion 12 formed on the inner side of the end cap 10 and the chuck 60 to send the sharp core to the outside end After sending this sharp shim, the sleeve 42 which stops when it retracts is The formed slider 40 and the core barrel 50 are formed to keep the sharp core inside the slider 40, and the chuck 60 and the sleeve 42 for sending the sharp core to the outside are pressed to their original positions. Sharp pencil, characterized in that the spring 70 is provided to provide a restoring force to return to. According to claim 1, wherein the sharp shim adjusting device 30 and the slider 40 is formed integrally on the inner side of the case 20 is fastened to one side of the tip cap 10 to which the sharp shim is sent to the case 20 and screw fastening When the case is rotated, the pencil is characterized in that the slider (40) along the threaded portion 22 inside the case (20) to adjust the length of the sharp shim by moving forward and backward.

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