Abstract:
A polishing holder for a workpiece end surface comprises a main body and a framework, in which the main body is coupled to a plurality of fixtures used for coupling to polished-to-be workpieces, a periphery of the main body is provided with a ring first supporting portion; a framework, provided with a second supporting portion surrounding an outside of the first supporting portion. Whereby, the second supporting portion limits a deviation region of the first supporting portion to enable the main body to be kept parallel to a polishing surface during a polished end surface of the workpiece is brought into contact with the polishing surface and polished thereby so that the production time and cost of the first supporting portion can be reduced broadly.

Description:
BACKGROUND OF THE INVENTION 
       [0001]    1. Field of the Invention 
         [0002]    The present invention relates to a polishing apparatus for a workpiece end surface, and more particularly to a holder for supporting a polished-to-be optical fiber end surface. 
         [0003]    2. Description of Related Art 
         [0004]    Optical fiber communication is an indispensable communication tool at the present and in the future. The main structure of an optical fiber connector used for the optical fiber communication, as  FIG. 1  shows, is constituted by allowing a fiber optical  11  to be passed through a ferrule  12  and then adhered to the ferrule  12  with an adhesive. The ferrule  12  can be made from plastic, glass or ceramics. A projecting spherical surface  121  of the end surface of the ferrule  12  is pressed on an elastic polishing surface and formed by means of coarse grinding, fine grind and polishing. The projecting spherical surface  121  must be a flawless curved surface. Here, an optical axis of the projecting spherical surface  121  can be parallel to a central line of the optical fiber  11  and can also be slanted up to a small angle in relation to the central line. 
         [0005]    A conventional method for polishing an optical fiber end surface is allowing the optical fiber end surface to be static and not to be moved, and allowing a polishing surface to be rotated and revolved to process the polishing on the optical fiber end surface; it can be known from a mathematical analysis disclosed in Taiwan Patent No. 485863 entitled as “Polishing apparatus for optical fiber end surface”. If the movement way of the polishing surface is rotation plus revolution, the optical fiber end surface is merely arranged on the circumference of the optical fiber end surface holder. If there is only revolution without rotation, the wearing degree of every place on the whole optical fiber end surface is the same. The optical end surf aces can be equally arranged on the whole optical fiber end surface. Besides, the patent mentioned above also discloses that if the polishing surface is fabricated to be linear and the polishing particles on one side of the linear polishing surface are coarser and the particles of another side thereof are finer. As  FIG. 2  shows, slide a several optical fiber end surface holders  2 ,  3  and  4  on a linear polishing surface  5  simultaneously, in which particles of a right side  6  of the polishing surface is coarser, and a left side  7  of the polishing surface is finer. The pressure between the optical fiber end surface arranged on a different position of the holder and the polishing surface  5  is allowed to be uniform. The optical fiber end surface holder  2 ,  3  and  4  are slid from the side of the polishing  5  with coarser particles toward the side thereof with finer particles and hence, the coarse and the fine grinding and the polishing procedures can be done at one time. Thus, if the problem that the pressure between the optical fiber end surface and the polishing surface is not uniform can be solved, theoretically, a great number of optical fiber end surfaces can be polished simultaneously. 
         [0006]    Basically, the uneven pressure origins from the following reasons:
   1. supporting points of the optical fiber end surface holder is not on the force exerting surface generated from the friction between the optical fiber end surface and the polishing surface so that a torque force is yielded to cause the holder to be slanted to generate uneven pressure.   2. that the polishing surface is not parallel to the holder might also cause uneven pressure to be yielded if the optical fiber end surface holder is clipped and fixed.   
 
         [0009]    Please refer to  FIGS. 3 and 4 . A conventional optical fiber end surface polishing apparatus comprises a polishing surface  20 , an optical fiber end surface ferrule  22 , an optical fiber end surface holder  23  and a pressing fixing rod  24 , in which an polished-to-be end of the optical fiber  25  is combined within the optical fiber end surface ferrule  22 . When there is a relative movement between the end surface of the optical fiber  25 , the optical fiber end surface holder  23  is subject to a transverse force at the end surface thereof. But, the supporting point is at the position of a contact point  31  or contact point  32  at this time such that the optical fiber end surface holder  23  is subject to a counterclockwise torque force and hence, the slanting state thereof is yielded as  FIG. 4  shows to cause the optical fiber end surface  251  to be lower than the optical fiber end surface  252 , i.e. cause the pressure exerted on the end surface  251  is larger than the end surface  252 . 
         [0010]    For solving the aforementioned problem, U.S. Pat. No. 5,216,846 discloses a spacer used for maintain the distance between a workpiece and a polishing surface. Because the polishing surface is elastic, maintaining the distance means maintaining the pressure. In such manner, certain of improvements can be obtained because parts of the uneven pressure are born by the spacer, but, the torque force still exists because the fundamental structure is not changed; the factors leading the pressure to be uneven still exist. Moreover, U.S. Pat. No. 6,039,630 discloses utilizing pressure sensor to measure instant pressure and compensate the unevenness of pressure by means of the method for electronically controlling a spring. 
         [0011]    Furthermore, such as U.S. Pat. No. 6,077,154 and U.S. Pat. No. 5,351,445 respectively propose a design for clipping and fixing an optical fiber end surface, as  FIG. 5  shows, in which an optical fiber end surface holder  41  is a plurality of optical fiber fixtures  42  for clipping optical fibers  43 . The optical fiber end surface holder  41  is fixed by the fixture  42  on the upper side of the polishing surface  45 . Because the optical fiber end surface holder  41  is clipped and fixed, the slanting problem generated from the torque force will not happen. But, there is still one problem; because the holder  41  is clipped to fix and the direction of the polishing surface  45  is also fixed in this design, in general, the holder  41  and the polishing surface  45  certainly not be able to be accurately parallel to each other. At this moment in time, the common practice is to adjust the angle of the fixture  42  used for fixing the holder  41 . But, this is not a natural contact such that a little unparallel phenomenon certainly exists. Besides, the pressure between the end surface of the optical fiber  43  and the polishing surface is exerted upwards from below; such kind of manner is not only complex but also inconvenient to be automated. Furthermore, if the polishing surface is linear as  FIG. 2  shows and the many optical end surface holders are disposed and simultaneously slid on this linear polishing surface, it is then difficult to maintain the uniform pressure of the optical fiber end surface at different positions on each holder. 
         [0012]    Two principles of allowing optical fiber end surfaces at different positions on a holder to be exerted by a uniform pressure are the followings:
   1. an optical fiber end surface holder cannot be clipped and fixed, and the holder as well as a polishing surface must be naturally brought into contact with each other if the polishing surface is a hard and inelastic polishing surface. It is also to say that the holder is followed to oscillate up and down if the polishing surface is oscillated and the average pressure of the end surface at different positions on the holder still is uniform while being oscillated up and down. The holder and the polishing surface must be kept fairly parallel to each other and in the meantime, the holder can still add pressure on the polishing surface if the polishing surface is elastic.   2. a plane formed by the optical fiber end surface in the process of polishing, i.e. a force exerting surface that the polishing surface exerts force on the holder needs to be designed with one or a several supporting points for the optical fiber end surface holders because the optical fiber end surface holders are not moved or rotated with the polishing surface in principle in the process of polishing. For allowing the pressure to be uniform, theses supporting points must be on this force exerting surface so as to keep the optical fiber end surface holders not to follow the polishing surface to move or rotate.   
 
         [0015]    Please refer to  FIG. 6 . A plurality of symmetrical accepting grooves  61  for accepting counterweights  62  are disposed on the periphery of a main body  60  of a holder disclosed by U.S. Pat. No. 7,063,062 allows the main body  60  to have force to cause the end surfaces of a plurality of optical fibers  63  to press down a polishing surface  64  such that the main body  60  contact naturally with the polishing surface  64 . But, the main body  60  is not provided with the fixing groove  51  of the main body  50  shown in  FIG. 6A , and a plurality of symmetrical fixing rods  65  are disposed below the sides of the main body  60 , a projecting contact portion  651  is disposed on the bottom of each fixing rod  65  and positioned in a fixing groove  661  of each framework  66 . A weephole  662  for draining fluid dropped into the accepting groove  661  during polishing is disposed on the lower end of the fixing groove  661 . A contact surface of the contact portion  651  and the fixing groove  661  is at the same plane as a contact surface of the bottoms of the plurality of optical fibers  63  to allow the supporting points of the main body  60  to be on a force exerting surface generated by the bottoms of the optical fibers  63  and the polishing surface. Thus, a torque force is not yielded to cause the main body  60  to be slanted and hence, the uneven pressure generation phenomenon can be avoided. 
         [0016]    The holder shown in  FIG. 6  allows the main body not to be rotated by utilizing the plurality of symmetrical fixing rods  65  to fix the main body  60 . Only a portion of the polishing surface brought into contact with the optical fiber end surface is used to cause each polishing point of the polishing surface  64  rather not to be used uniformly. Besides, bottom ends of the four fixing rods  65  of the main body  60  must be kept at the same plane to cause the manufacturing to be very difficult. 
         [0017]    U.S. patent application Ser. No. 11/812,967 discloses a polishing holder for an optical fiber end surface. A main body and a framework of the holder are respectively provided with corresponding fixing portions, at least one of the two fixing portions is provided with at least one set of upper contact portion and lower contact portion, the upper contact portion and the lower contact portion on each set are respectively disposed on the upper side and the lower side of a contact plane of a polished end surface of the workpiece and a polishing surface. The mutual contact restriction of the upper contact portion, the lower contact portion and another fixing portion is used to allow the main body to maintain parallel to the polishing surface so as to elevate the polishing speed and quality. 
       SUMMARY OF THE INVENTION 
       [0018]    For further improving a supporting structure between a main body and a framework of a optical fiber end surface polishing holder to allow the supporting structure to be manufactured more easily to save the production time and cost; besides, a position of the main body corresponding to a polishing surface can be changed in the process of polishing to allow each polishing point of the polishing surface rather to be uniformly used so as to elevate the polishing quality. Hence, the present invention is proposed. 
         [0019]    The main object of the present invention is to provide a polishing holder for a workpiece end surface, allowing supporting structures of a main body and a framework to be manufactured more easily. 
         [0020]    Another object of the present invention is to provide a polishing holder for a workpiece end surface, allowing an optical fiber end surface on a main body to be uniformly brought into contact with each area of a polishing surface; each polishing point of the polishing surface can be uniformly worn and torn to enable the polished degree of each optical fiber end surface to be more uniform so as to elevate the polishing yield factor of all the optical fiber end surfaces. 
         [0021]    Still another object of the present invention is to provide a polishing holder for a workpiece end surface allowing each optical fiber to be arranged and retained more conveniently while being polished. 
         [0022]    For attaining to the objects mentioned above, the present invention proposes a polishing holder for a workpiece end surface, comprising: 
         [0000]    a main body, coupled to a plurality of fixtures used for respectively coupling to polished-to-be workpieces, a periphery of the main body is provided with a ring first supporting portion; and
 
a framework, provided with a second supporting portion surrounding an outside of the first supporting portion; whereby, the second supporting portion limits a deviation region of the first supporting portion to enable the main body to be kept parallel to a polishing surface during a polished end surface of the workpiece is brought into contact with the polishing surface and polished thereby.
 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0023]    The present invention can be more fully understood by reference to, the following description and accompanying drawings, in which: 
           [0024]      FIG. 1  is a schematic view of a conventional optical fiber connector; 
           [0025]      FIG. 2  is a perspective view of a conventional polishing apparatus; 
           [0026]      FIG. 3  is across sectional view of a conventional polishing apparatus; 
           [0027]      FIG. 4  is across sectional view of a conventional polishing apparatus in use; 
           [0028]      FIG. 5  is a perspective view of a conventional holder coupled to fixtures; 
           [0029]      FIG. 6  is a cross sectional view of a conventional holder; 
           [0030]      FIG. 7  is an exploded view of a polishing apparatus of a first preferred embodiment according to the present invention; 
           [0031]      FIG. 8  is a perspective view of a polishing apparatus of a first preferred embodiment according to the present invention; 
           [0032]      FIG. 9  is a cross sectional view of a polishing apparatus of a second preferred embodiment according to the present invention; 
           [0033]      FIG. 10  is a cross sectional view of a polishing apparatus of a third preferred embodiment according to the present invention; 
           [0034]      FIG. 11  is a cross sectional view of a polishing apparatus of a fourth preferred embodiment according to the present invention; 
           [0035]      FIG. 12  is a cross sectional view of a polishing apparatus of a fifth preferred embodiment according to the present invention; 
           [0036]      FIG. 13  is a cross sectional view of a polishing apparatus of a sixth preferred embodiment according to the present invention; 
           [0037]      FIG. 14  is a cross sectional view of a polishing apparatus of a seventh preferred embodiment according to the present invention; and 
           [0038]      FIG. 15  is a perspective view of a polishing apparatus of a eighth preferred embodiment according to the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0039]    Please refer to  FIGS. 7 and 8 . A holder of a first preferred embodiment according to the present invention comprises a main body  71  and a framework  72 . The main body  71  is coupled to a plurality of fixtures  711 ; each fixture  711  is coupled to at least one fiber end surface ferrule to couple to an optical fiber  73 . Sides of the main body  71  close to a periphery thereof are provided with a plurality of accepting grooves  712 ,  713  to accept counterweights utilized to exert a downward pressure on the main body  71 . But, if there is no counterweight added to exert the downward force on the main body  71 , a rotational speed of a polishing surface may be controlled by a friction force between the polishing surface and optical fiber end surfaces, a rotational angle speed of the polishing surface must be far smaller than a revolutionary angle speed thereof. The accepting grooves  712 ,  713  respectively are a curved groove, cylindrical groove or long groove. A periphery of the main body  71  is provided with a ring first supporting portion  714 , an outer wall of the first supporting portion  714  is coupled to at least one poker bar  715 . The framework  72  has a ring second supporting portion  721 . The second supporting portion  721  surrounds an outer side of the first supporting portion  714 . A continuous polishing type polishing surface  74  is further accepted inside the second supporting portion  721 . A middle part of the framework  72  is provided with a through hole  722  for enabling polished end surfaces of the optical fiber  73  to be propped against the polishing surface  74  to allow the polishing operation to be processed. The second supporting portion  721  is provided with a long slot  723  for allowing the poker bar  715  to be passed through and a breach  724  communicated with the long slot  723  for allowing the poker bar  715  to be passed through the long slot  724  to place in the long slot  723  as shown in  FIG. 8 . 
         [0040]    An inner side of the second supporting portion  721  is provided with a ring retaining groove  725 . A bottom of the first supporting portion  714  is accepted in the retaining groove  725 . A function of allowing the main body  71  to be kept parallel to the polishing surface  74  in the process of polishing can be similarly attained by designing a contact portion of the first supporting portion  714  and the retaining groove  725  to be approximately at the same plane as a contact place of the polished end surfaces of the optical fibers  73  and the polishing surface  74 . Furthermore, contact positions of the polished end surfaces of the optical fibers  72  and the polishing surface  74  may be changed by pushing the poker bar  715  to drive the main body  71  to rotate an angle relatively to the framework  72  and the polishing surface  74  to allow each polishing point of the polishing surface  74  to be brought into contact with the polished end surface of the optical fiber  73  more uniformly thereby allowing each polishing point of the polishing surface  74  to be used more equally, abrasion thereof to be more uniform, and allowing the plurality of optical fibers  73  distributed at different positions can obtain a more identical polishing type to elevate a polished yield factor of the polished end surfaces of the whole optical fibers  73 . 
         [0041]    The supporting structure for the main body  71  and the framework  72  is constituted by the first and second supporting portions  714 ,  721  and the retaining groove  725 . It is unnecessary to process a difficult operation of adjusting the bottoms of the four fixing rods  65  to be at the same level plane while manufacturing the first supporting portion  714  such that the production time and cost can be broadly reduced. 
         [0042]    Please refer to  FIG. 9 . A holder of a second preferred embodiment according to the present invention comprises a main body  75  and a framework  76 . The main body  75  is coupled to a plurality of fixtures  751 ; each fixture  751  is coupled to at least one optical fiber end surface ferrule to couple to an optical fiber  77 . sides of the main body  75  close to a periphery thereof is provided with a plurality of symmetrical accepting grooves  752 ,  753  for accepting counterweights  754 . The periphery of the main body  75  is provided with a ring first supporting portion  755 . The framework  76  is provided with a ring second supporting portion  761 . The second supporting portion  761  surrounds an outer side of the first supporting portion  755 . A polishing surface  78  is further accepted inside the second supporting portion  761 . A middle part of the framework  76  is provided with a through hole for allowing a polished end surface of the optical fiber  77  to be propped against the polishing surface  78  to process a polishing operation. An outer wall of the first supporting portion  755  is coupled to at least one poker bar, the second supporting portion  761  is provided with a long slot for accepting the poker bar and a breach communicated with the long slot for allowing the poker bar to be passed through the breach to place in the long slot as the structure described in the first embodiment; it is not shown in the figure. An inner wall of the second supporting portion  761  is provided with projecting upper and lower contact portions  762 ,  763 . The upper and lower contact portions  762 ,  763  are respectively positioned in a range of approximately 2 centimeters above and below a contact plane  781  of the polished end surface of the optical fiber  77  and the polishing surface  78 . The upper and lower contact portions  762 ,  763  can respectively limit a deviation range of the first supporting portion  755  in the process of polishing. The present embodiment also can attain to allowing a supporting structure for the main body to be manufactured more easily to enable each polishing point of the polishing surface to be worn and torn more equally and abrasion of each optical fiber end surface to be more uniform to elevate a function such as a polishing yield factor of all optical fiber end surfaces. 
         [0043]    Please refer to  FIGS. 9 and 10 . A holder of a third preferred embodiment according to the present invention comprises a main body  79  and a framework  80 , a structure thereof is approximately the same as the holder of the second embodiment. But, an outer wall of a first supporting portion  791  of the main body  79  is provided with projection upper and lower contact portions  792 ,  793  to replace the upper and the lower contact portions  762 ,  763  of the second supporting portion  791  of the second embodiment. The upper and the lower contact portions  792 ,  793  are respectively positioned in a range approximately 2 centimeters above and below a contact plane  781  of a polished end surface of the optical fiber  77  and the polishing surface  78 , the second supporting portion  801  can respectively limit deviation ranges of the upper and the lower contact portions  792 ,  793  of the first supporting portion  791 . The present embodiment also can attain to allowing a supporting structure for the main body to be manufactured more easily to enable each polishing point of the polishing surface to be worn and torn more equally and abrasion of each optical fiber end surface to be more uniform to elevate a function such as a polishing yield factor of all optical fiber end surfaces. 
         [0044]    Please refer to  FIGS. 9 and 11 . A holder of a fourth preferred embodiment according to the present invention comprises a main body  81  and a framework  82 , a structure thereof is approximately the same as the holder of the second embodiment. But, a second supporting portion  821  is provided with a plurality of symmetrically disposed screw holes  8211 ,  8212 , the screw holes  8211 ,  8212  are respectively engaged with screws  822 ,  823 ; the screws  822 ,  823  are projected out of an inner wall of the second supporting portion  821  to form projecting upper and lower contact portions  824 ,  825  to replace the upper and the lower contact portions  762 ,  763  of the second supporting portion  761  of the second embodiment. The upper and the lower contact portions  824 ,  825  are respectively positioned in a range approximately 2 centimeters above and below a contact plane  781  of a polished end surface of the optical fiber  77  and the polishing surface  78 , the upper and the lower contact portions  824 ,  825  of the second supporting portion  821  can respectively limit a deviation range of the first supporting portion  811 . The present embodiment also can attain to allowing a supporting structure for the main body to be manufactured more easily to enable each polishing point of the polishing surface to be worn and torn more equally and abrasion of each optical fiber end surface to be more uniform to elevate a function such as a polishing yield factor of all optical fiber end surfaces. Besides, spaces between the first and the second contact portions  824 ,  825  and the first supporting portion  811  can be adjusted by utilizing the screws  822 ,  823 . 
         [0045]    Please refer to  FIGS. 9 and 12 . A holder of a fifth preferred embodiment according to the present invention comprises a main body  83  and a framework  84 , a structure thereof is approximately the same as the holder of the second embodiment. But, a lower end of a first supporting portion  831  is lower than a lower end of a second supporting portion  841 , upper and lower ends of an inner wall of the second supporting portion  841  is utilized to be upper and lower contact portions  842 ,  843  respectively to replace the projecting upper and lower contact portions  762 ,  763  disposed on the second supporting portion  761  of the second embodiment. The upper and the lower contact portions  842 ,  843  are respectively positioned in a range approximately 2 centimeters above and below a contact plane  781  of a polished end surface of the optical fiber  77  and the polishing surface  78 , the upper and the lower contact portions  842 ,  843  of the second supporting portion  841  can respectively limit a deviation range of the first supporting portion  831 . The present embodiment also can attain to allowing a supporting structure for the main body to be manufactured more easily to enable each polishing point of the polishing surface to be worn and torn more equally and abrasion of each optical fiber end surface to be more uniform to elevate a function such as a polishing yield factor of all optical fiber end surfaces. 
         [0046]    Please refer to  FIGS. 9 and 13 . A holder of a sixth preferred embodiment according to the present invention comprises a main body  85  and a framework  86 , a structure thereof is approximately the same as the holder of the second embodiment. But, a lower end of a first supporting portion  851  is higher than a lower end of a second supporting portion  861 , a upper end of an inner wall of the second supporting portion  861  and a portion of the inner wall thereof corresponding to a lower end of a first supporting portion  851  are utilized to be upper and lower contact portions  862 ,  863  respectively to replace the projecting upper and lower contact portions  762 ,  763  disposed on the second supporting portion  761  of the second embodiment. The upper and the lower contact portions  862 ,  863  are respectively positioned in a range approximately 2 centimeters above and below a contact plane  781  of a polished end surface of the optical fiber  77  and the polishing surface  78 , the upper and the lower contact portions  862 ,  863  of the second supporting portion  861  can respectively limit a deviation range of the first supporting portion  851 . The present embodiment also can attain to allowing a supporting structure for the main body to be manufactured more easily to enable each polishing point of the polishing surface to be worn and torn more equally and abrasion of each optical fiber end surface to be more uniform to elevate a function such as a polishing yield factor of all optical fiber end surfaces. 
         [0047]    Please refer to  FIGS. 9 and 14 . A holder of a seventh preferred embodiment according to the present invention comprises a main body  87  and a framework  88 . A structure thereof is approximately the same as the holder of the second embodiment. But, the main body  87  and the framework  88  have no disposition of such as poker bar, long slot or breach as the main body  75  as the framework  76  of the second embodiment have. An outer wall of a first supporting portion  871  of the main body  87  is provided with a rack  872 . A slot is disposed between first and second contact portions  882 ,  883  of the second supporting portion  881  of the framework  88 . The framework is further coupled to a transmission mechanism  885 . A transmission gear  884  of the transmission mechanism  885  is passed through the slot of the second supporting portion  881 . The main body  87  can be driven by the transmission mechanism  885  to rotate when the rack  872  is engaged with the transmission gear  884 . The upper and the lower contact portions  882 ,  883  of the second supporting portion  881  can respectively limit a deviation range of the first supporting portion  871 . The present embodiment also can attain to allowing a supporting structure for the main body to be manufactured more easily to enable each polishing point of the polishing surface to be worn and torn more equally and abrasion of each optical fiber end surface to be more uniform to elevate a function such as a polishing yield factor of all optical fiber end surfaces. Besides, the main body  87  is driven to rotate through the transmission gear  884  to change a contact position of a polished end surface of the optical fiber  77  and the polishing surface  78  to allow each polishing point of the polishing surface  78  to be brought into contact with the polished end surface of the optical fiber  77  more uniformly thereby allowing each polishing point of the polishing surface  78  to be used more equally, abrasion thereof to be more uniform, and allowing the plurality of optical fibers  77  distributed at different positions can obtain a more identical polishing type to elevate a polished yield factor of the polished end surfaces of the whole optical fibers  77 . 
         [0048]    Please refer to  FIGS. 7 ,  8  and  15 . A holder of an eighth preferred embodiment according to the present invention comprises the main body  71  and the framework  72  of the first embodiment. Besides, the main body  71  is further coupled to a hanger  716  provided with a cross rod  717 ; the cross rod  717  is coupled to a plurality of hooks  718 . A middle section of the optical fiber  73  may be wound into a multiple number of circles, and then hung on the hook  71 . The present embodiment also can attain to allowing a supporting structure for the main body to be manufactured more easily to enable each polishing point of the polishing surface to be worn and torn more equally and abrasion of each optical fiber end surface to be more uniform to elevate a function such as a polishing yield factor of all optical fiber end surfaces. Besides, each optical fiber  73  in the process of polishing is allowed to arrange and fix more conveniently by using the hanger  716 . 
         [0049]    The holders of holders of the second to seventh embodiments according to the present invention mentioned above may also be coupled to the hanger  716  disclosed in the eighth embodiment to allow each optical fiber in the process of polishing can be arranged and fixed more conveniently. 
         [0050]    The present invention allows a first supporting portion of a main body to be ringlike to replace a design of a plurality of fixing rods; it can reduce the production time and cost broadly because a difficult operation of adjusting the bottoms of the plurality of fixing rods at the same level plane is unnecessary. The first supporting portion may be a circular ring or other type of ring. 
         [0051]    The present invention allows the main body to be rotated an angle relatively to the framework and the polishing surface to change a contact position of a polished end surface of an optical fiber and a polishing surface to allow each polishing point of the polishing surface to be brought into contact with the polished end surface of the optical fiber more uniformly thereby allowing each polishing point of the polishing surface to be used more equally, abrasion thereof to be more uniform, and allowing the plurality of optical fibers distributed at different positions can obtain a more identical polishing type to elevate a polished yield factor of the polished end surfaces of the whole optical fibers. 
         [0052]    Additional advantages and modifications will readily occur to those skilled in the art. Therefore, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described herein. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents.