Patent Publication Number: US-2009229763-A1

Title: Correction device having receiving and replacement functions

Description:
BACKGROUND OF THE INVENTION 
     (a) Field of the Invention 
     The present invention relates to correction devices, and particularly to a correction stationery device having receiving and replacement functions which is used to coat upon a writing or printing object for correction. 
     (b) Description of the Prior Art 
     The prior art correction device is used for correcting the errors in writing or printing. The correction device has a hollow casing. An interior of the correction device has an inner core. The inner core has another simple structured inner casing. Two rollers are installed within the inner casing. One roller is wound with a correction tape. A surface of the correction tape is coated with adhesive. When the correction tape passes through a coating material at a front end thereof and then passes through another roller so as to form as a prior art correction device. To be economic for reuse, replaceable inner cores are provided to replace an exhausted one. 
     However in the prior art, the casing is formed by an upper cover and a lower cover matched to the upper cover. The upper cover and lower cover are engaged by hooked sheets and recesses matched to the hooked sheets. However this structure cause that when replacing the inner core, the casing is difficult to be detached, even the hooked sheets and the recesses destroy so that the casing can not be used. Furthermore, the coating device at a front end of the inner core often protrudes out of the front end of the casing, and thus it is easy to be destroyed due to collision. Because it protrudes out of the casing, the correction material on the correction tape is easy to deteriorate. 
     SUMMARY OF THE INVENTION 
     Accordingly, the object of the present invention is to provide an correction device having receiving and replacement functions, which is a special designed mechanism so that the inner core of the correction device is slidable within the casing so that it can be received into the casing and the inner core is replaceable. 
     To achieve above object, the present invention provides a correction device having receiving and replacement functions comprising a casing  1  having a protruding opening  13  at a front end thereof; and a rear end thereof having an insertion opening  14 ; an inner core  2  having an inner casing  21 , two rollers, a correction tape  22  and a coating material  23  at a front end thereof; the inner core  2  inserting into the insertion opening  14  and then passing through the coating material  23  and then protruding out from the protruding opening  13 ; a resilient mechanism  3  having a retaining unit  31  installed in the casing  1 ; the retaining unit  31  being combined to the first elastic unit  34  so that the first elastic unit  34  can eject the inner core  2  in a direction opposite to an insertion direction of the inner core  2  of the correction device; and a positioning unit  4  having a press unit  41  pivoted in the casing  1 ; a surface of the press unit  41  adjacent to the inner core  2  of the correction device being installed with a first stop block  412  and a second stop block  413 ; an opposite surface thereof being installed with a second elastic unit  42  so that an elastic force of the second stop block  413  will eject the press unit  41 , so that the first stop block  412  and the second stop block  413  are engaged to the inner core  2  of the correction device. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an explosive schematic view of the structure of the present invention. 
         FIG. 2  is an exploded perspective view about a part of the structure of the present invention. 
         FIG. 3  is an exploded perspective view of the inner core of the present invention. 
         FIG. 4  is a schematic view showing the assembly of the correction device of the present invention. 
         FIG. 5  is a cross sectional view showing the assembly of the correction device of the present invention. 
         FIG. 6  is a schematic view showing the operation of the correction device of the present invention. 
         FIG. 7  is a schematic view showing another operation of the correction device of the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims. 
     Referring to Figures, the correction device with receiving and replacing functions according to the present invention is illustrated. The structure includes a correction device, an inner core  2 , a resilient mechanism  3 , and a positioning unit  4 . As shown in  FIGS. 1 and 2 , the casing  1  is formed by a first casing  1  and a second casing  2  matching to the first casing  1 . The combination of the first casing  1  and second casing  2  is formed as a hollow shape therein. A front end of the casing  1  is formed with a protruding opening  13  and a rear end thereof is formed with a larger insertion opening  14 . A retaining portion  15  and a pivotal hole  16  are formed within the casing  1 . The retaining portion  15  has a recess  151  for retaining the resilient mechanism  3  described herebelow. An inner core  2 , as shown in  FIGS. 1 and 2 , is a replaced inner core  2 . The inner core  2  has a hollow inner casing  21 . Two rollers are installed in the inner casing  21 . A correction tape  22  winds around one roller so that a free end of the correction tape  22  passes through a coating material  23  at a front end thereof. Then the correction tape  22  winds through another roller within the inner casing  21 . An axial shaft  24  is formed in a predetermined position of the inner casing  21 . One lateral wall thereof has a protrusion  25 . Thereby the inner core  2  can insert into the insertion opening  14  and then is slideable in the casing  1  (referring to  FIGS. 3 and 4 ) so that the coating material  23  at the front end and a section of the correction tape  22  protrudes out from the protruding opening  13 . 
     A resilient mechanism  3 , as shown in  FIGS. 1 and 2 , has a retaining unit  31  combined to the casing  1 . Each of two sides of the retaining unit  31  has a respective pivotal block  32  which is inserted into the recess  151  of the retaining portion  15 . The retaining unit  31  is formed with an axial shaft  33  which is aligned to the axial shaft  24  of the inner core  2 . The axial shaft  33  is combined with a first elastic unit  34 , assembling the first elastic unit  34  so that it can provide an ejection elastic force with a direction reverse to the insertion direction of the inner core  2 . The first elastic unit  34  may be a helical spring (referring to  FIGS. 2 and 5 ) so that one end of the helical spring is engaged to the axial shaft  33  of the retaining unit  31 . Another end thereof will push the axial shaft  24  of the inner core  2 . 
     A positioning unit  4 , as shown in  FIGS. 1 and 2 , has a press unit  41 . Each of two sides of the press unit  41  is installed with a pivot shaft  411  which is pivoted to the pivotal hole  16  in the casing  1 . A surface of the press unit  41  adjacent to the inner core  2  has a first stop block  412  and a second stop block  413 . An opposite surfaces thereof is installed with a second elastic unit  42  which is helical spring so that the second elastic unit  42  resists against between an inner wall of the casing  1  and the press unit  41  so that the first stop block  412  and the second stop block  413  will buckle the protrusion  25  at the lateral side of the inner core  2  (referring to  FIG. 5 ). Further, one end of the press unit  41  has a press sheet  414  extending out of the insertion opening  14  of the casing  1  for controlling the first stop block  412  and second stop block  413  to separate from the protrusion  25 . 
     By above-mentioned structural features of the casing  1 , inner core  2 , resilient mechanism  3  and positioning unit  4 , the structure of the present invention is formed, as shown in  FIGS. 4 and 5 . The inner core  2  is inserted into the casing  1  so that the protrusion  25  and the positioning unit  4  are buckled to the first stop block  412 . The coating material  23  at the front end and a section of the correction tape  22  can protrude out of the protruding opening  13  for correction. After use, it is only necessary to press the press sheet  141  of the press unit  41 , the first stop block  412  will separate from the protrusion  25 , and then by the first elastic unit  34  of the resilient mechanism  3  will make the inner core  2  reduce inwards. If it is necessary to replace an inner core  2 , it is only necessary to drive the press unit  41  to cause the second stop block  413  to separate from the protrusion  25  (referring to  FIG. 7 ) so that the old inner core  2  can be retracted out. 
     The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.