KR20020006004A - Apparatus for with drawing Lead in sharp pencil - Google Patents

Abstract

PURPOSE: Provided is an outlet device of a sharp pencil core which requires simple hand movement when writing. The device is without a spring which exists usually in the other sharp pencils but uses a pinion type roller at the end part of a finger to outlet the core by moving the roller up and down. It makes the assembly process of the sharp pencil simple and makes the up and down action of the finger unnecessary to bring out the core of the sharp pencil. CONSTITUTION: The device comprises; arranging a core(1) and its tube(2)(or a core(1) support rod(3)) at the center line of the sharp pencil and a rack(4) in a round form at the bottom, installing a pinion type roller(7) at the angular hole(6) of bottom part outside tube(5) so that its axis(8) is inserted into the side groove and the gear tooth(7') of the roller(7) being engaged into the rack(4).

Description

Sharp seam drawer {Apparatus for with drawing Lead in sharp pencil}

The present invention has been made for the purpose of easily withdrawing the sharp shim when writing a letter with a pencil.

Conventional mechanical pencils have a problem of raising and lowering a finger by intermittently pressing a normal knob or push button of the side two or three times, but the present invention has been installed at the lower finger tip of the sharp. By simply rolling the pinion type roller (pinion type roller) up and down, the sharp seam is pulled out and the spring in the conventional sharp is omitted, simplifying the assembly process and eliminating the hassle of raising and lowering the fingers.

The present invention has been devised to eliminate the drawbacks of the prior art as described above, and the teeth of the pinion rollers installed at the fingertips of the lower pencil end are knurling. The pitch, tooth tip height, and tooth root height of the gear tooth are lowered to form a good contact feeling of the fingers, and the racks connected to the lower part of the core pipe are also pinion type rollers. It should form well with the teeth of the teeth.

1 is a longitudinal cross-sectional view of the present invention;

FIG. 2 is a plan sectional view taken along the line A-A of FIG.

3 is a partial front view showing the main part of the external appearance of the present invention;

Explanation of symbols on the main parts of the drawings

DESCRIPTION OF SYMBOLS 1 Sharp core 2 Core tube 3 Sharp core support rod

4: rack 5: external appearance 6: square hole

7: Pinion Type Roller 7 ': Tooth

8 shaft 9 shaft groove 10 spring

11: processed plate 12: conical contact tube

Angle hole which opened the rack 4 under the core (1) pipe (2) (or the sharp core (1) support bar (3)) on the mechanical pencil center line, and laid it below the exterior (5). (Iii) 6, a pinion roller 7 is provided so that the shaft 8 is indented in the shaft groove 9, so that the gear 7 of the roller 7 is 7 '. By engaging the rack (4).

Reference numeral 10 denotes a spring, 11 a pore plate, and 12 a conical contact tube.

Referring to the operation of the present invention configured as described above in detail as follows. Square hole (4) formed under the ordinary core pipe (2) inserted in the normal sharp core (1) support rod (3), and laid in the lower part of the exterior (5). (6), the pinion roller (7) is inserted so that the shaft (8) is infiltrated into the shaft groove (9), the tooth tooth (7 ') is the core tube (2) The rollers 7 are engaged with the racks 4 of the rollers. Therefore, when the rollers 7 are rolled up and down in the direction of the arrow, the sharp cores (1 support rods 3) are moved downward, and they are fixed with a conventional conical tactile tube 12. The spring 10 on the pore plate 11 is contracted, and the inclined jaw at the lower end of the sharp shim 1 support rod 3 protrudes out of the hole of the pore plate 11 and elastically expands ( In this way, the inclined lower end of the conventional sharp shim (1) support rod (3) constitutes two or three split jaws, and its tip is elastically opened to enlarge the sharp shim (1) ball. Because it is forever When Jow immerses into the hole in the hole of the hole (11), it collapses and holds the sharp shim (1) tightly. When projecting out of the hole of the hole of the hole (11), the sharp shim (1) advances slightly and the hole expands. Shim (1) is to stop the advancement.

And the conventional sharp has a hassle to put a finger on the top of the knob (Nob) in order to pull out the shim (1), but the present invention has a pinion-type roller (Roller) installed below the exterior (5) Since 7) is driven only by the fingertip movement to draw out the sharp shim 1, the trouble of raising and lowering a finger is eliminated.

And when rolling the roller (7) down, the sharp shim (1) support rod (3) is raised, the inclined jaw (Jow) at the end of the immersion into the hole of the pore plate 11 to tighten the sharp shim (1) Since the holding function, the spring 10 in the conventional shaft may be omitted, so that the assembly process is simplified.

By the way, in the practice of the present invention, the spring 10 may intervene in the sharp seam support rod 3, but when the roller 7 is rolled up, the force is slightly increased, and the force is not applied when rolling down. In addition, as a separate embodiment, even if the pinion roller 7 is press-fitted by inserting a silicone tube having a high elasticity and friction force under the sharp core support rod 3, the marks of the teeth remain, thereby preventing slipping. The effect is the same.

According to the present invention, since the roller (7) is installed at the fingertip of the lower side of the external pipe and rolls up and down, there is a convenience store to eliminate the trouble of raising and lowering the finger as in the conventional art. ), The teeth 7 'are engaged with the rack 4, so that the sharp shim can be pulled out by the downward movement of the sharp shim 1, the supporting rod 3, and the spring 10 in the conventional pencil can be omitted. Termination is effective.

Claims (2)

Square hole (1) rounded the rack (4) below the core (1) pipe (2) (or the sharp core (1) support rod (3)) on the center of the mechanical pencil and installed below the exterior (5). 6, a pinion type roller 7 is inserted into the shaft 8 so that the shaft 8 penetrates the shaft groove 9 so that the gear tooth 7 'enters into the rack 4; Sharp take-out device characterized in that the interlocking. The method of claim 1 The teeth of the pinion roller (7) intervened in the lower square hole (6) of the exterior (5) in the elastic tube having a large friction force inserted so as not to slide under the sharp core (1) support rod (3). A sharp shim take-out device, characterized by being pressed (7 ').