Abstract:
A rolling device of utilizing flexible material, such as a soft piece, a tap, a plastic piece, a cardboard, a metal sheet, to roll a flexible thin component, such as a soft piece, a paper, a plastic piece, a metal sheet, a cloth, so as to inject the flexible thin component into the rolling device or to eject the flexible thin component out of the rolling device.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to a rolling device, and more particularly, to a rolling device of utilizing a tape, a plastic piece, a cardboard or a metal sheet to roll up a soft piece, a paper, a plastic piece or a cloth. 
         [0003]    2. Description of the Prior Art 
         [0004]    A rolling device is disclosed in TW patent application No. 94205453. Please refer to its figures. A rolling device of the TW patent utilizes a scrolling spring to roll up the paper disposed inside a pen. The rolling device includes a tube, a spindle, a protruding portion, a scrolling spring, a flexible thin component and a bottom covering. A first end of the scrolling spring is fixed on the spindle for surrounding the spindle and ending at a second end. A first end of the flexible thin component connects to a second end of the scrolling spring and surrounds the scrolling spring via the spindle for forming the spindle-flexible thin component set. The spindle-flexible thin component set is disposed on the tube and an end of the spindle protrudes out of the tube for forming a spindle protruding portion, and the bottom covering is covered and puts it inside a casing. After, a rotary component is disposed on the spindle protruding portion for forming a flexible thin component device, so as to drive the flexible thin component by rotating the spindle protruding portion, so that the flexible thin component can be rolled in or rolled out the casing of the flexible thin component device. Finally, the spindle-flexible thin component set device is disposed inside the tube for forming the pen having the rolling device. 
         [0005]    Deformation of a curvature radius of the scrolling spring of the conventional rolling device is hard to be controlled, and the force applied on an inner side of the flexible thin component is unstable due to various contacts between the spindle and the flexible thin component. Further, unstable force application happens by friction between different areas of the scrolling spring when the flexible thin component is rotated by the scrolling spring. Therefore, because the scrolling spring surrounds the flexible thin component over and over, the force applied on the inner side of the flexible thin component is unstable in the conventional rolling device, which results the rolling invalidation of the flexible thin component and unstable yield rate. Design of a rolling device having stable function of the scrolling spring is an important issue of the mechanical industry. 
       SUMMARY OF THE INVENTION 
       [0006]    The present invention provides a rolling device of utilizing a tape, a plastic piece, a cardboard or a metal sheet to roll up a soft piece, a paper, a plastic piece or a cloth. The rolling device includes a spindle, and the spindle is a pillar component. The rolling device further includes a casing whereinside an accommodating space is formed, the spindle is disposed inside the casing, an end of the spindle is exposed out of the casing, and an opening is formed on the casing, so that a flexible thin component injects into and ejects out of the casing via the opening. The rolling device further includes a flexible recovering component, an end of the flexible recovering component is fixed on the spindle, the other end of the flexible recovering component is fixed on the flexible thin component, and the flexible recovering component has a resilient coefficient for recovering, so that an exposed part of the curved flexible thin component contacts an inner surface of the casing when the flexible thin component is curved and surrounds curvature radius of the spindle. The rolling device further includes a rotary component externally disposed on a top of the casing with the spindle and connecting to the end of the spindle, so as to rotate the spindle for injecting into or ejecting out of the flexible thin component. 
         [0007]    According to the claimed invention, the flexible recovering component is a resilient component, such as a metal thin piece, and a length of the resilient component is smaller than a periphery of the spindle, and the resilient component is a metal sheet for preventing unstable force application due to friction between different parts of the resilient component. The present invention can improve drawbacks of a conventional rolling device, such as annulment of rolling movement. In addition, manufacturing cost and material cost of the present invention are economized according to the length of the resilient component of the new rolling device. 
         [0008]    According to the claimed invention, a rolling device includes a spindle, and the spindle being a pillar component. The rolling device further includes a casing whereinside an accommodating space is formed, and the spindle is disposed inside the casing. An end of the spindle is exposed out of the casing, and an opening is formed on the casing so that a flexible thin component injects into and ejects out of the casing via the opening. The rolling device further includes a flexible recovering component. A first end of the flexible recovering component is fixed on the spindle, and a second end of the flexible recovering component is fixed on the flexible thin component. The flexible recovering component has a curved recovering coefficient for transmitting a pulling force or a pushing force from the first end to the second end. The flexible recovering component is pushed without deformation according to the minimize curved recovering coefficient, and the curved recovering coefficient is greater than the minimize curved recovering coefficient which results the pulling force or the pulling force dispersing on a surface of the flexible recovering component uniformly, so as to generate uniform static friction and uniform kinetic friction between the flexible recovering component and the flexible thin component, and the uniform static friction and the uniform kinetic friction are smaller or equal to the pulling force and the pushing force. The flexible recovering component is composed of a group consisting of a tape, a soft piece, a plastic piece or the cardboard. The rolling device further includes a rotary component externally disposed on a top of the casing with the spindle and connecting to the end of the spindle so as to rotate the spindle for injecting into or ejecting out of the flexible thin component. 
         [0009]    These and other objectives of the present invention will no doubt become obvious to those of ordinary skill in the art after reading the following detailed description of the preferred embodiment that is illustrated in the various figures and drawings. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0010]      FIG. 1  is a diagram of a flexible recovering component-spindle mechanism according to an embodiment of the present invention. 
           [0011]      FIG. 2A  is a diagram of a flexible thin component according to the embodiment of the present invention. 
           [0012]      FIG. 2B  is a diagram of a flexible thin component-spindle mechanism according to the embodiment of the present invention. 
           [0013]      FIG. 3  is an exploded diagram of a rolling device according to the embodiment of the present invention. 
           [0014]      FIG. 4  is an assembly diagram of a rolling device according to the embodiment of the present invention. 
           [0015]      FIG. 5  is a diagram of a pen having the rolling device according to the embodiment of the present invention. 
           [0016]      FIG. 6  is a side view of the rolling device according to the embodiment of the present invention. 
           [0017]      FIG. 7  is a diagram of the rolling device according to the other embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION 
       [0018]    Please refer to  FIG. 1  to  FIG. 4 . A spindle  101  is formed firstly, and the spindle  101  is a pillar component. A first end  103  of a flexible recovering component  102  having a resilient coefficient for recovering is fixed on a conjunction  104  of the spindle  101  for forming a flexible recovering component-spindle mechanism  10 . The resilient recovering component  102  adjacent to the conjunction  104  stretches and becomes arc shape inside an accommodating space of a casing  112 , so as to surround the spindle  101 . The flexible recovering component  102  stretches to a final end of a second end  106 , and the second end  106  is adhered for pasting function as shown in  FIG. 1 . In this embodiment, the flexible recovering component  102  is a resilient component, and the resilient component can be a metal thin component. It should be mentioned that a length of the resilient component  102  is smaller than a periphery of the spindle  101  when the flexible recovering component  102  is the resilient component. A flexible thin component  107  is disposed. A first end  108  of the flexible thin component  107  connects to the second end  106  of the flexible recovering component  102 , and surrounds the spindle  101  including the flexible recovering component  102 . The flexible thin component  107  rolls up to a final end of a second end  109  of the flexible thin component  107  for forming a flexible thin component-spindle mechanism  11 . As shown in  FIG. 2B , the flexible thin component  107  can be a paper, a soft piece, a plastic piece, a metal sheet, a cloth and so on. The flexible thin component-spindle mechanism  11  is disposed inside the casing  112  having an opening  110  and an inclined wall  111 . It should be mentioned that an end  105  of the spindle  101  is exposed out of a hole  113  on a top surface of the casing  112 . A bottom  114  is coupled to an opening  115  on a low area of the casing  112  for accommodating the flexible thin component-spindle mechanism  11 . A pivot  112  is disposed on the low area of the casing  112  for supporting and rotating the low area of the spindle  101 . When the flexible thin component  107  is curved and surrounds curvature radius of the spindle  101 , an exposed part of the curved flexible thin component  107  contacts an inner surface of the casing  112 . It should be mentioned that the second end  109  of the flexible thin component  107  is guided by the inclined wall  111  for contacting the inclined wall  111  when the second end  109  passes through the opening  110 , so that the flexible thin component  107  can pierce through the opening  110 . Then, the casing  112  can be disposed on a tube  118  including an opening  116  corresponding to the opening  110 , and an inclined wall  117 . The tube  118  recovers the casing  112 , and the second end  109  passes through the opening  116  and is exposed out of the tube  118  by guiding of the inclined wall  117  via the opening  110 , the inclined wall  111  and the corresponding opening  116 . Furthermore, a spindle opening  120  is formed on a top portion  119  of the tube  118 , and a portion  105  of the spindle  101  can pass outward the spindle opening  120 . Then, a rotary component  121  is disposed on the top portion  119  of the tube  118  and connects to the exposed portion  105  of the spindle  101 , so that the spindle  101  can be rotated for rolling in and rolling out the flexible thin component  107 . After the flexible thin component  107  is rolled out, the flexible thin component  107  can be cut according to demand. The flexible recovering component  102  can be for fitting a space between the casing  112  and the spindle  101 , so as to keep the flexible thin component contacting to an inner surface of the casing  112 . Rolling device of the present invention is not limited to the above-mentioned embodiment, for example, the rolling device can be disposed inside the tube  118  or any other structure, and it depends on design demand. 
         [0019]      FIG. 4  is an assembly of the rolling device  13 . a combining component  131  is coupled to the low end of the tube  118  for connecting the rolling device  13  to a tip component  14 , so as to form the pen  15  having the rolling device. 
         [0020]    Please refer to  FIG. 6 , which shows a diagram of a side view of the rolling device. The first end  103  of the flexible recovering component  102  adjacent to the conjunction  104  stretches outwardly and surrounds the spindle  101  in a curved arc manner. 
         [0021]    Application force of the spindle  101  includes a pulling force and a pushing force. The pushing force P 1  points a direction of the application force for rolling out the flexible thin component  107 , and the pulling force P 2  points a direction of the application force for rolling in the flexible thin component  107 . A description of the pushing force P 1  is introduced as follows. 
         [0022]    The flexible recovering component  102  has a curved recovering coefficient for transmitting a pulling force or a pushing force from a first end  103  of the flexible recovering component  102  to a second end  106  of the flexible recovering component  102 . The flexible recovering component  102  can recover after forcing due to function of the curved recovering coefficient, and the curved recovering coefficient correspond to material of the flexible recovering component  102 . A formula of the curved recovering coefficient is: 
         [0000]    
       
      
       K=F/S  
      
     
         [0000]    wherein K is the curved recovering coefficient of the flexible recovering component  102 , F is effective application force of the flexible recovering component  102 , and S is a displacement of the flexible recovering component  102 . As k value is small, a huge displacement is generated by a small application force F, and the flexible recovering component  102  can recover without deformation. Because the deformation of the flexible recovering component  102  makes the rolling device ineffective, the curved recovering coefficient of the flexible recovering component  102  is equal to minimize curved recovering coefficient of the flexible recovering component  102  pushed by the application force without deformation. The curved recovering coefficient of the flexible recovering component  102  is greater than the minimize curved recovering coefficient of the flexible recovering component  102  for uniformly dispersing the pushing force P 1  on a surface of the flexible recovering component  102 , so as to generate uniform static friction and kinetic friction between the flexible recovering component  102  and the flexible thin component  107 . The static friction and the kinetic friction generated by the curved recovering coefficient is smaller than or equal to the allowed pushing force (such as the allowed pushing force by a user) for rolling out the flexible thin component  107  effectively. The flexible recovering component  102  can be made by a group consisting of a tape, a plastic piece, a cardboard and so on. Therefore, a formula of the pushing force P 1  by the user is as follows: 
         [0000]        P 1 ≧f 1 max   (1)
 
         [0000]    wherein f1 max  is the max value of the static friction. Because the kinetic friction is usually greater than the max value of the static friction, the rolling device works as the pushing force is greater than the max value of the static friction. On the other word, as the formula (1) forms, the flexible thin component  107  can be pushed outward. When the front end  1071  of the flexible thin component  107  rotates at the opening  110 , the front end  1071  is ejected out of the casing  112  by guiding of the inclined wall  111 , and further is guided to pass through the opening  116  of the tube  118 , so as to roll out a suitable length according to user demand. As the formula (1) does not work, the flexible thin component  107  can not be pushed outward. Material of the flexible recovering component  102  can be changed for decreasing the static friction and the kinetic friction, so as to decrease the pushing force P 1  and to keep the function of the flexible thin component  107 . It should be mentioned that the curved recovering coefficient of the flexible recovering component  102  can not too small for prevent the flexible recovering component  102  from deforming as rolling out. Deformation of the flexible recovering component  102  makes the rolling function ineffectively (the spindle  101  is rotated and the flexible thin component  107  can not be rolled out). The resilient coefficient of the flexible recovering component  102  is minimize resilient coefficient which makes the flexible recovering component  102  lost recovering function as pushing. Thus, loading intensity H of the curved recovering coefficient of the flexible recovering component  102  is as follows: 
         [0000]        H≧f 1 max   (2)
 
         [0023]    On the other word, difference of each area on the flexible thin component  107  is limited within a range, which means the flexible thin component  107  is forced uniformly. As the difference of each area on the flexible thin component  107  is greater than a value, the flexible thin component  107  deforms or can not contact the inner surface of the casing  112 , which makes the rolling device ineffectively. Therefore, the curved recovering coefficient of the flexible recovering component  102  is greater than a minimize curved recovering coefficient, so as to generate the uniform kinetic friction and uniform static friction between the flexible thin component  107  and the flexible recovering component  102 . 
         [0024]    Please refer to the embodiment of the rolling device shown in  FIG. 7 . the flexible recovering component  102  can be made by the group consisting of the tape, the soft piece, the plastic piece, the cardboard and so on. As the flexible recovering component  102  is made by the above-mentioned material, a sunken part  16  is formed on the spindle  101  for accommodating the flexible recovering component  102 , and a fixing component  17  is utilized to wedge inside the sunken part  16  for fixing the flexible recovering component  12  on the spindle  101 , so as to strengthen the intensity. The flexible recovering component  102  can be adhered inside the sunken part  16 . 
         [0025]    As the flexible recovering component  102  is the resilient component (such as the metal thin component), the flexible recovering component  102  has the resilient coefficient for recovering, which means for contacting the exposed part of the curved flexible thin component  107  to the inner surface of the casing  112  when the flexible thin component  107  is rolled out according to the curvature radius of the spindle  101 . The flexible thin component  107  can be force uniformly by constraining the length of the resilient component being smaller than the periphery of the spindle  101 . 
         [0026]    Furthermore, the casing  112  can be made by the material having low friction coefficient for decreasing the pushing force P 1  by the user. Max static friction between the casing  112  and the flexible thin component  107  is smaller than or equal to the pushing force P 1 , and the pushing force P 1  is smaller than or equal to the loading intensity H of the flexible recovering component  102  for preventing the flexible recovering component  102  from deforming. That is to say the above-mentioned situation is allowed according to the following formula: 
         [0000]        f 2 max   ≦P 1 ≦H   (3)
 
         [0027]    Material satisfying the formula (3) can be used for making the casing  112 . For example, the casing can be made of plastic material having low friction coefficient. 
         [0028]    The present invention has following advantages:
   (1) The scrolling spring can be made easily.   (2) The length of the flexible recovering component is decreased, so that the manufacturing cost of the flexible recovering component is decreased. The insert molding method with high cost is unnecessary.   (3) Rolling invalidation of the flexible thin component can be solved effectively.   
 
         [0032]    Those skilled in the art will readily observe that numerous modifications and alterations of the device and method may be made while retaining the teachings of the invention.