Abstract:
A coating device includes a main body and at least one ionic-wind generating device. The main body includes a first surface, a second surface opposite to the first surface, and a plurality of receiving holes passing through the first surface and the second surface. Each receiving hole is used for receiving an element which needs to be coated and includes an inlet for letting the element to enter the receiving hole. The inlet is positioned on the first surface. The at least one ionic-wind generating device is positioned on one side of the main body, and is used for blowing ionic-wind towards a direction opposite to the second surface, thus blowing ionic-wind towards the element before the element enters the inlet.

Description:
BACKGROUND 
       [0001]    1. Technical Field 
         [0002]    The present disclosure relates to coating devices and, particularly, to a coating device, which can remove dust and static electricity attached on elements, which need to be coated. 
         [0003]    2. Description of Related Art 
         [0004]    Before lenses are received in a vapor deposition chamber, it is easy for dust to contaminate the lens, this will have a great influence on the coating quality of the lens during the vapor deposition process. 
         [0005]    Therefore, it is desirable to provide a coating device that can overcome the above-mentioned limitations. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0006]    Many aspects of the embodiments should be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. 
           [0007]      FIG. 1  is a schematic view of a coating device, according to an exemplary embodiment. 
           [0008]      FIG. 2  is similar to  FIG. 1 , but viewed from a different angle. 
           [0009]      FIG. 3  is a partially cross-sectional view of the coating device of  FIG. 1 , when a shielding cover is received in a through hole. 
       
    
    
     DETAILED DESCRIPTION 
       [0010]    Referring to  FIGS. 1-3 , a coating device  11 , according to an exemplary embodiment, is used for coating a number of lenses  22 . Each lens  22  includes a need-to-be-coated surface  2   a  and an opposite rear surface  2   b.    
         [0011]    The coating device  11  includes a supporting frame  10 , a main body  20 , a shielding cover  30 , a number of ionic-wind generating devices  40 , and a driving device  45 . 
         [0012]    The supporting frame  10  includes a cuboid bottom plate  100 , four vertical poles  120 , two horizontal poles  140 , and two guiding poles  160 . The bottom plate  100  defines a round through hole  102 , and includes an inner sidewall  104  bounding the through hole  102 . The inner sidewall  104  defines a number of cylindrical receiving holes  106 . Each receiving hole  106  is inclined within the inner sidewall  104  and is in communication with the through hole  102 . The four vertical poles  120  are perpendicularly fixed to the four corners of the bottom plate  100 . The two horizontal poles  140  are parallel to each other. Each of the two horizontal poles  140  is connected between two adjacent vertical poles  120 . 
         [0013]    Each horizontal pole  140  has a fixing surface  140   a  facing the other horizontal pole  140 . Each fixing surface  140   a  defines two round mounting holes  142  arranged on the two ends of the corresponding horizontal pole  140 . The two guiding poles  160  are connected between the two horizontal poles  140  and are parallel to each other. Each guiding pole  160  is cylindrical, and the diameter of each guiding pole  160  is slightly smaller than that of the mounting hole  142 , and thus the two ends of the guiding poles  160  can be firmly received in the corresponding two mounting holes  142 . 
         [0014]    The main body  20  is disk-shaped, and the diameter of the main body  20  is slightly smaller than that of the through hole  102 . The main body  20  includes a first surface  20   a  and a second surface  20   b  opposite to the first surface  20   a . The main body  20  defines a number of receiving holes  200  for loading the lenses  22 . Each receiving hole  200  extends though the first surface  20   a  and the second surface  20   b . A protruding ring  202  perpendicularly extends from the inner sidewall of the receiving hole  200  adjacent to the second surface  20   b . The receiving hole  200  includes an inlet  204  adjacent to the first surface  20   a  for allowing the lenses  22  to enter the receiving hole  200 . The receiving hole  200  is used for receiving the lenses  22  and loading the lenses  22  on the protruding ring  202 . 
         [0015]    The shielding cover  30  is disk-shaped, the diameter of the shielding cover  30  is slightly smaller than that of the through hole  102 . The shielding cover  30  has a round top surface  30   a  which has a number of protrusions  300  corresponding to the receiving holes  200  and a bottom surface  30   b . The shape of the protrusion  300  is substantially the same as the shape of the inlet  204 , and thus the protrusions  300  can be received in the receiving holes  200 . When the protrusions  300  are received in the receiving holes  200 , the distance between each protrusion  300  and the protruding ring  202  is larger than or equal to the thickness of the lens  22 . 
         [0016]    The shape of the ionic-wind generating device  40  is substantially the same as that of the receiving hole  106 , and used for generating ionic-wind. An included angle between the first surface  20   a  and the blowing direction of the ionic-wind generating device  40  is about 5° to about 25°. In this embodiment, the included angle is about 15°. 
         [0017]    The driving device  45  includes a horizontal linear motor  50 , a vertical linear motor  60 , and a cylinder  70 . The horizontal linear motor  50  includes a strip-shaped horizontal stator  500  and a horizontal forcer  502 . The length of the horizontal stator  500  is larger than the distance between the two horizontal poles  140 . The horizontal forcer  502  is slidably arranged on the horizontal stator  500 , and can be driven by the horizontal stator  500  to move along the horizontal stator  500 . 
         [0018]    The vertical motor  60  includes a strip-shaped vertical stator  600 , a vertical forcer  602 , and two guiding blocks  604 . The vertical forcer  602  is slidably arranged on the vertical stator  600 , and can be driven by the vertical stator  600  to move along the vertical stator  600 . The two guiding blocks  604  are arranged on the two ends of the vertical stators  600 . Each guiding block  604  defines a cylinder-shaped guiding hole  606 . Both of the axial directions of the two guiding holes  606  are perpendicular to the moving direction of the vertical stator  600 . The distance between the two guiding holes  606  is equal to the distance between the two mounting holes  142 . 
         [0019]    The cylinder  70  includes a cylinder block  700  and a piston rod  702  extending from the cylinder block  700 . The piston rod  702  can be driven by the cylinder block  700  to move towards or away from the cylinder block  700 . 
         [0020]    In assembly, the main body  20  is welded to the through hole  102 . The protruding ring  202  is away from the horizontal poles  140  with respect to the inlet  204 . The receiving hole  106  is adjacent to the first surface  20   a  with respect to the second surface  20   b . The ionic-wind generating devices  40  are received in the receiving holes  106 , and blow ionic-wind towards the upper inclined direction with respect to the inner sidewall  104 . The two ends of the horizontal stator  500  are respectively fixed on the middle of the two horizontal poles  140 . The horizontal forcer  502  faces the main body  20 . The horizontal forcer  502  is fixed on the middle of the vertical stator  600 , and the vertical stator  600  faces the main body  20 . The two guiding poles  160  are inserted into the two guiding holes  606 . The two ends of the two guiding poles  160  are inserted into the corresponding mounting holes  142 , and thus the two guiding poles  160  are parallel to the horizontal stator  500 , the vertical stator  600  is perpendicular to the horizontal stator  500 . The vertical forcer  602  is fixed on one side of the cylinder block  700  away from the piston rod  702 . The extension direction of the piston rod  702  is perpendicular to the direction of the vertical stator  600 . The piston rod  702  is perpendicularly fixed on the middle of the bottom surface  30   b  of the shielding cover  30 . 
         [0021]    In use, the bottom plate  100  of the supporting frame  10  is horizontally arranged on a coating vacuum (not shown), and the second surface  20   b  faces a target (not shown). The shielding cover  30  does not shield the main body  20 . The ionic-wind generating devices  40  are turned on to blow ionic-wind towards the lenses  22  when the lenses  22  move to the main body  20 . During the above process, dust and static electricity attached on the need-to-be-coated surface  2   a  of the lenses  22  is blown off. The lenses  22  pass through the inlet  204  to be resisted on the protruding ring  202 . The horizontal linear motor  50  first drives the vertical linear motor  60  to drive the cylinder  70  and the shielding cover  30  to move towards the middle of the horizontal stator  500  along the direction of the horizontal stator  500 . Then the vertical linear motor  60  drives the cylinder  70  and the shielding cover  30  to move towards the middle of the vertical stator  600  along the direction of the vertical stator  600 , at this time, the shielding cover  30  is arranged over the through hole  102 . The cylinder  70  drives the shielding cover  30  to move downwards to cover the first surface  20   a  of the main body  20 , and thus the protrusions  300  are received in the receiving holes  200 . In the above process, the ionic-wind generating devices  40  blow ionic-wind towards the shielding cover  30 , and thus the dust and the static electricity contaminating the shielding cover  30  is blown off. 
         [0022]    The shielding cover  30  is moved into the through hole  102 , and the protrusions  300  move into the receiving holes  200  and cover the rear surface  2   b  of the lenses  22 . At this time, the ionic-wind generating device  40  is turned off. Then, the coating device  11  starts to coat the lenses  22 . During the coating process, because the shielding cover  30  is fitted with the through hole  102 , the target ion cannot enter the through hole  102 . Further, even if the ion enters the through hole  102 , because the protrusions  300  are fitted with the receiving holes  200 , the ion entering the through hole  102  cannot enter the receiving hole  200  to contaminate the rear surface  2   b  of the lenses  22 . 
         [0023]    In other embodiments, during the design of the coating device  11 , the main body  20  and the driving device  45  also can be fixed on the inner sidewall of the vacuum (not shown), and thus the supporting frame  10  can be omitted. 
         [0024]    In other embodiments, if only the receiving holes  200  can load the lenses  22 , the protruding ring  202  also can be omitted. Such as, the receiving hole  200  is an inverted platform shaped, and the top opening is larger than the bottom opening, the bottom opening is smaller than the lenses  22 . 
         [0025]    In other embodiments, the shielding cover  30  can be held by hand, and the driving device  45  also can be omitted. 
         [0026]    In other embodiments, the coating device  11  can be used for loading other elements, which need to be coated. 
         [0027]    It will be understood that the above particular embodiments are shown and described by way of illustration only. The principles and the features of the present disclosure may be employed in various and numerous embodiments thereof without departing from the scope of the disclosure as claimed. The above-described embodiments illustrate the scope of the disclosure but do not restrict the scope of the disclosure.