Abstract:
The present disclosure relates to a method of manufacturing a pen that feels good when writing and has a solid state lead not causing collapsing or bending thereof, and particularly, to a method of manufacturing a solid state lead pen so that a solid state lead extracted from or inserted into a pen has an elegant appearance and excellent transparency. Disclosed is a method of manufacturing a solid state lead pen including: filling the inside of a body with a solid state lead material; attaching a handle assembly to the body to immerse a holder of a screw attached to the inside of the handle assembly into the solid state lead material; extracting a half solidified solid state lead to the outside of the body; solidifying the half solidified solid state lead extracted to the outside of the body; and inserting the solidified solid state lead into the body.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
       [0001]    This application claims priority to Korean Patent Application No. 10-2010-0078429, filed on Aug. 13, 2010, and all the benefits accruing therefrom under 35 U.S.C. §119, the contents of which in its entirety are herein incorporated by reference. 
     
    
     BACKGROUND 
       [0002]    1. Field 
         [0003]    The present disclosure relates to a method of manufacturing a pen that feels good when writing and has a solid state lead not causing collapsing or bending thereof, and particularly, to a method of manufacturing a solid state lead pen so that a solid state lead extracted from or inserted into a pen has an elegant appearance and excellent transparency. 
         [0004]    2. Description of the Related Art 
         [0005]      FIG. 1  is a conceptual diagram illustrating a procedure of manufacturing an existing solid state lead pen. 
         [0006]    As shown in  FIG. 1 , a solid state lead pen  100  includes: a handle  20  that is rotated by a user, a body  11  that supports a solid state lead  13 S positioned therein, a screw  21  that extracts the solid state lead  13 S received inside the handle  20  to the outside of the body  11  or inserts it into the body  11 , and a cap  15  that opens and blocks an entrance of the body  11 . 
         [0007]    As a method of manufacturing the solid state lead pen  100  with the above-described configuration, the handle  20  and the body  11  are assembled, and the screw  21  is inserted into the body  11  so that the screw  21  is fastened to the handle  20 . 
         [0008]    Then, a nozzle  1  ejecting the solid state lead material  13 L is inserted into the body  11 , and the solid state lead material  13 L is ejected through the nozzle  1 . Subsequently, a holder  23  formed at the upper end of the screw  21  is filled with the solid state lead material  13 L, and the inside of the body  11  is filled with the solid state lead material  13 L as the ejection amount increases. 
         [0009]    When the solid state lead material  13 L is filled up to the entrance of the body  11 , the body  11  is covered by the cap  15  after stopping the ejection and moving the nozzle  1 . When the solid state lead material  13 L is air-cooled in this state, the solid state lead material  13 L filled in the body  11  is solidified. 
         [0010]    In order to use the solid state lead pen  100  manufactured in this manner, the user removes the cap  15  and rotates the handle  20  while holding the body  11  by one hand. Accordingly, the screw  21  rises, so that the solid state lead  13 S fixed to the holder  23  of the screw  21  is pushed up by the screw  21 . The user may write a letter or draw a picture by using the solid state lead  13 S extracted to the outside of the body  11 . When the user wants to stop using the solid state lead pen  100 , the user rotates the handle  20  to insert the extracted solid state lead  13 S into the body  11  and manages the solid state lead pen by covering it with the cap  15 . 
         [0011]    Meanwhile, when the solid state lead material  13 L is filled in the body  11  and is solidified in an air-cooling condition, the solid state lead material  13 L is solidified while being fixed to the inner surface of the body  11 . When the solid state lead  13 S solidified in this manner is pushed up, a part of the solid state lead  13 S fixed to the inner surface of the body  11  is stretched and cut, so that there are problems in that the outer surface of the solid state lead  13 S is not elegant and the stretched portion has a shape in which it flows down along the solid state lead  13 S. 
         [0012]    Furthermore, when the solid state lead  13 S and the body  11  are strongly fixed to each other, there is a problem in that an erroneous operation occurs in which the solid state lead  13 S is not extracted due to the idle rotation of the screw  21  or the solid state lead  13 S is deformed even when it is extracted. 
         [0013]    Furthermore, the solid state lead  13 S is formed to be transparent, but there is a disadvantage in that the transparency is degraded due to the discoloration of the stretched portion as described above. 
         [0014]    In order to solve such a disadvantage, lubricant is applied into the body  11  to for a lubricating layer before the filling of the solid state lead material  13 L, and the solid state lead material  13 L is filled therein. 
         [0015]    However, there are disadvantages in that a lubricant supply facility and a lubricant application facility need to be provided for the lubricating layer and the solid state lead pen manufacturing process becomes complicated due to the additional lubricant application step. 
         [0016]    Furthermore, since the lubricant flows down when the lubricant is applied while the body stands, there is a disadvantage in that the outer surface of the solid state lead is uneven due to the lubricating layer. 
         [0017]    Moreover, there is a disadvantage in that the transparency of the solid state lead is degraded due to the lubricating layer. 
       SUMMARY 
       [0018]    The present disclosure is directed to providing a method of manufacturing a solid state lead pen so that an outer surface of a solid state lead is elegant and transparency of the solid state lead is excellent even when a lubricant application process is not provided. 
         [0019]    In one aspect, there is provided a method of manufacturing a solid state lead pen including: filling the inside of a body with a solid state lead material; attaching a handle assembly to the body to immerse a holder of a screw attached to the inside of the handle assembly into the solid state lead material; extracting a half solidified solid state lead to the outside of the body; solidifying the half solidified solid state lead extracted to the outside of the body; and inserting the solidified solid state lead into the body. 
         [0020]    The half solidified solid state lead may be extracted to the outside of the body after 25 to 35 minutes are elapsed from the time when the inside of the body is filled with the solid state lead material. 
         [0021]    One side of the body may be opened, and a cap may be attached to the opened one side so that one side of the body may be opened and blocked by the cap. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0022]    The above and other aspects, features and advantages of the disclosed exemplary embodiments will be more apparent from the following detailed description taken in conjunction with the accompanying drawings in which: 
           [0023]      FIG. 1  is a conceptual diagram illustrating a procedure of manufacturing an existing solid state lead pen; 
           [0024]      FIG. 2  is a conceptual diagram illustrating a procedure of manufacturing a solid state lead pen according to one embodiment of this disclosure; and 
           [0025]      FIG. 3  is a side view illustrating the manufactured solid state lead pen. 
       
    
    
     DETAILED DESCRIPTION 
       [0026]    Exemplary embodiments now will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments are shown. The present disclosure may, however, be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth therein. Rather, these exemplary embodiments are provided so that the present disclosure will be thorough and complete, and will fully convey the scope of the present disclosure to those skilled in the art. In the description, details of well-known features and techniques may be omitted to avoid unnecessarily obscuring the presented embodiments. 
         [0027]    The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present disclosure. As used herein, the singular forms “a”, “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, the use of the terms a, an, etc. does not denote a limitation of quantity, but rather denotes the presence of at least one of the referenced item. The use of the terms “first”, “second”, and the like does not imply any particular order, but they are included to identify individual elements. Moreover, the use of the terms first, second, etc. does not denote any order or importance, but rather the terms first, second, etc. are used to distinguish one element from another. It will be further understood that the terms “comprises” and/or “comprising”, or “includes” and/or “including” when used in this specification, specify the presence of stated features, regions, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, regions, integers, steps, operations, elements, components, and/or groups thereof. 
         [0028]    Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein. 
         [0029]    In the drawings, like reference numerals denote like elements. The shape, size and regions, and the like, of the drawing may be exaggerated for clarity. 
         [0030]    In the drawings,  FIG. 2  is a conceptual diagram illustrating a procedure of manufacturing a solid state lead pen according to one embodiment of this disclosure, and  FIG. 3  is a side view illustrating the manufactured solid state lead pen. 
         [0031]    As shown in  FIGS. 2 and 3 , a solid state lead pen  100  includes: a cylindrical body  110 , a cap  115  that blocks an entrance at one side of the body  110 , and a handle assembly  120  that is attached to the other side of the body  110  and is used to extract a solid state lead  130 S positioned inside the body  110  to the outside of the body  110  or insert it into the body  110 . When the solid state lead  130 S is fixed to the handle assembly  120  and the handle  121  of the handle assembly  120  is rotated, the solid state lead  130 S is extracted to the outside of the body  110  or is inserted into the body  110  by an inner screw  123 . 
         [0032]    Then, an inner cap  116  is fixed to the cap  115 . When the inside of the body  110  is filled with a solid state lead material  130 L while the entrance of the body  110  is blocked by the cap  115 , the distal end of the solid state lead material  130 L is molded in a shape according to the shape of the inner cap  116 . 
         [0033]    Hereinafter, a method of manufacturing the solid state lead pen with the above-described configuration will be described. 
         [0034]    As shown in  FIG. 2 , the method of manufacturing the solid state lead pen  100  includes: attaching the cap  115  to the body  110  to block the entrance of the body  110 ; filling the inside of the body  110  with the solid state lead material  130 L from the other side thereof while the entrance of the body  110  is blocked; fastening the handle assembly  120  to the other side of the body  110  to immerse a holder  125  of the screw  123  into the solid state lead material  130 L; opening the cap  115  and rotating the handle  121  of the handle assembly  120  to extract the solidifying solid state lead  130 S to the outside of the entrance of the body  110 ; solidifying the solid state lead  130 S; inserting the solidified solid state lead  130 S into the body  110  after the solid state lead  130 S is solidified in the extracted state; and blocking the entrance of the body  110  using the cap  115 . 
         [0035]    Hereinafter, each of the steps of manufacturing such a solid state lead will be described in detail. 
         [0036]    One side of the cylindrical body  110  is an entrance, and the other side thereof is attached with the handle assembly  120 . The cap  115  is attached to the entrance of the body  110  to block the entrance of the body  110 . 
         [0037]    The inner cap  116  is positioned inside the cap  115  and the cap  115  is attached to the body  110  while the inner cap  116  faces the entrance of the body  110 . 
         [0038]    The inside of the body  110  is filled with the solid state lead material  130 L through the other side of the body  110  while the entrance of the body  110  is blocked by the cap  115 . The solid state lead material  130 L has fluidity in the form of gel. When the inside of the body  110  is filled with a predetermined amount of the solid state lead material  130 L, the material  130 L is filled therein according to the shape of the inside of the body  110  and the inner cap  116 . 
         [0039]    Then, the handle assembly  120  is attached to the other side of the body  110 . The handle assembly  120  includes the handle  121  that is rotatably coupled to the body  110 , the screw  123  that is positioned inside the handle  121  and is threaded into the inner surface of the handle  121 , and the holder  125  that is formed at one end of the screw  123  and is coupled to the solidified solid state lead  130 S. When the handle assembly  120  with the above-described configuration is attached to the other side of the body  110 , the screw  123  advances into the body  110 , and the holder  125  is immersed into the filled solid state lead material  130 L. 
         [0040]    In this state, the solid state lead material  130 L is solidified as time goes by, but the hardness thereof does not increase any more after 40 to 50 minutes due to the characteristics thereof. When the solid state lead material  130 L is completely solidified after 40 to 50 minutes at an air-cooling condition, a part of the outer surface of the solidified solid state lead  130 S is fixed to the inner surface of the body  110 . Accordingly, in this disclosure, the handle  121  of the handle assembly  120  is rotated to extract the solid state lead  130 S to the outside of the body  110  while the solid state lead  130 S is half solidified. 
         [0041]    The half solidified state of the solid state lead  130 S indicates a state where the shape of the solid state lead  130 S is formed, but the solid state lead  130 S is slidable without being fixed to the inner surface of the body  110  due to a small friction thereof. 
         [0042]    In this manner, when the half solidified solid state lead  130 S is extracted to the outside of the body  110 , since there is no portion fixed between the solid state lead  130 S and the body  110 , the half solidified solid state lead  130 S is slid to the outside of the body  110 . 
         [0043]    Here, it reaches the half solidified state after 25 to 35 minutes are elapsed from the time when the inside of the body  110  is filled with the solid state lead material  130 L. When the elapsing time is less than 25 minutes, the hardness of the solid state lead material  130 L is low, so that the solid state lead material  130 L may be deformed due to the own weight when it is pushed up out of the entrance of the body  110 . When the elapsing time exceeds 35 minutes, it becomes a partially solidified state, so that some portions may be fixed to the inner surface of the body  110 . Accordingly, the half solidified solid state lead  130 S needs to be pushed out of the body  110  after 25 to 35 minutes are elapsed from the time when the inside of the body  110  is filled with the solid state lead material  130 L. 
         [0044]    In this manner, the half solidified solid state lead  130 S is extracted to the outside of the body  110  and is cooled in atmosphere, so that the solid state lead  130 S is completely solidified. 
         [0045]    When the solid state lead  130 S is completely solidified, the handle  121  is rotated to insert the solidified solid state lead  130 S into the body  110 , and the entrance of the body  110  is blocked by the cap  115 . 
         [0046]    In this manner, since the half solidified solid state lead  130 S is completely solidified after it is extracted to the outside of the body  110 , it is possible to prevent the existing problem in which the outer surface of the solid state lead is fixed to the inner surface of the body. Accordingly, this disclosure may solve the problems occurring when manufacturing the existing solid state lead pen, the problems corresponding to the uneven appearance of the solid state lead and the irregular transparency. Furthermore, since this disclosure does not need the application of lubricant, the manufacturing process may be shortened and the facility for the application of lubricant may not be needed. 
         [0047]    Meanwhile, the method of manufacturing the solid state lead pen according to this disclosure relates to a method of manufacturing a material having characteristics in which it is solidified from a liquid state into a solid state, and a pencil, a glue, a crayon, a board marker, and the like having a core material such as a solid state lead may be easily manufactured by the method of manufacturing the solid state lead pen according to this disclosure. 
         [0048]    As described above, in the method of manufacturing the solid state lead pen of this disclosure, since the solid state lead material filled in the body is extracted to the outside before it is solidified so as to be solidified in atmosphere, the solid state lead may be smoothly manufactured. 
         [0049]    Furthermore, in the method of manufacturing the solid state lead pen of this disclosure, since the solid state lead material is not fixed to the inner surface of the body while the solid state lead is solidified, the transparency may be maintained. 
         [0050]    Furthermore, in the method of manufacturing the solid state lead pen of this disclosure, since the solid state lead material is solidified while being extracted to the outside of the body and the solidified solid state lead is inserted into the body, the facility and the process for the application of lubricant are not needed. Accordingly, the facility and the manufacturing process are simple. 
         [0051]    While the exemplary embodiments have been shown and described, it will be understood by those skilled in the art that various changes in form and details may be made thereto without departing from the spirit and scope of the present disclosure as defined by the appended claims. 
         [0052]    In addition, many modifications can be made to adapt a particular situation or material to the teachings of the present disclosure without departing from the essential scope thereof. Therefore, it is intended that the present disclosure not be limited to the particular exemplary embodiments disclosed as the best mode contemplated for carrying out the present disclosure, but that the present disclosure will include all embodiments falling within the scope of the appended claims.