Patent Publication Number: US-2018052340-A1

Title: Positioner and positioning equipment

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
     This application claims the benefit of Chinese Patent Application 201620895753.8 filed on Aug. 17, 2016 in the State Intellectual Property Office of China, the whole disclosure of which is incorporated herein by reference. 
     TECHNICAL FIELD 
     The present disclosure relates to a field of the display technology, especially to a positioner and positioning equipment. 
     DESCRIPTION OF THE RELATED ART 
     In the field of display technology, the LCD (Liquid Crystal Display) display has the characteristics of a small size, a low power consumption and a low manufacturing cost, which gradually dominates the display market. 
     For LCD displays, attaching a polarizer is an indispensable step. In the production process, it is necessary to perform a positioning operation to the polarizer, regardless of whether equipment runs automatically, or the staff implements an operation of placing or removing a polarizer. 
     However, as for a positioner in the prior art, before placing the polarizer, it is required to release the two first screws and the two second screws of the conventional positioner one by one, and slide them along the grooves to the edge, and then place the polarizer, and slide the positioner along the groove to the edge of the polarizer, and then tighten the four screws respectively to position the polarizer. As the structure of the conventional positioner is complicated, operations of the positioner are cumbersome, and the screws are frequently slipped or deformed. On a basis of this, the screw is of a linear structure, resulting in that the screw is not perpendicular to a bottom of the screw if the screw is deformed in the process of fastening the screw or screws and nuts are loosen. Therefore, the polarizer can be damaged when the polarizer is taken out. 
     SUMMARY 
     An embodiment of the present disclosure provides a positioner and positioning equipment. The positioner has a simple structure, an operation process which is easy, and damage to the edge of the polarizer will be avoided when the polarizer is taken out. 
     In order to achieve the above object, the embodiments of the present disclosure employ the following technical solutions: 
     According to an aspect of the present disclosure, there is provided a positioner comprising a bottom face and a first side face which are perpendicular and adjacent to each other, the first side face being configured to abut against a work piece to be positioned so as to position the work piece to be positioned, the bottom face being provided with a magnetic member. 
     Optionally, the positioner comprises a bottom plate and a side plate which are arranged in a L-shape, the bottom plate comprising the bottom face, and the side plate comprising the first side face. 
     Optionally, the positioner further comprises a first guide structure provided on the bottom face; and the first guide structure is configured to guide the positioner when the positioner is moved. 
     Optionally, the first guide structure is a guide beam provided on the bottom face. 
     Optionally, the number of the guide beam is at least two and the guide beams are arranged to be parallel to each other. 
     Optionally, the first side face comprises a bar-shaped protrusion. 
     Optionally, a side of the bar-shaped protrusion which abuts against the work piece to be positioned is an arc surface. 
     Optionally, the bar-shaped protrusion extends from the bottom of the first side face to the top of the first side face in a direction perpendicular to the bottom face. 
     Optionally, the magnetic member comprises a plurality of magnetic bars which are mutually independent. 
     Optionally, the positioner further comprises a rubber pad attached to the bottom face. 
     Optionally, the positioner further comprises an opening which is configured to place the positioner on a magnetic platform or to take the positioner away from the magnetic platform. 
     According to another aspect of the present disclosure, there is provided a positioning equipment comprising a magnetic platform configured for placing a work piece to be positioned, wherein it further comprises a above mentioned positioner, the positioner being adapted to be attracted to the magnetic platform through the magnetic member provided on the bottom face, the first side face being configured to abut against the work piece to be positioned so as to position the work piece to be positioned, the bottom face being provided with a magnetic member. 
     Optionally, a second guide structure is provide on the magnetic platform, and the positioner further comprises a first guide structure on the bottom face; and wherein the second guide structure is configured to cooperate with the first guide structure provided on the bottom face of the positioner to move the positioner with respect to the magnetic platform in a preset direction. 
     Optionally, the first guide structure is a guide beam, and the second guide structure is a guide groove. 
     Optionally, the magnetic platform comprises a bottom plate and at least one side wall provided on the bottom plate, a first side face of the positioner and a side wall of the magnetic platform are configured to abut against the work piece to be positioned, so as to position the work piece to be positioned. 
     Optionally, the height of the side wall of the magnetic platform is the same as the height of the first side face of the positioner. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       In order to clearly illustrate the embodiments of the present disclosure or the prior art, the following drawings, which are to be used in the description of the embodiments or the prior art, will be briefly described. It will be apparent that the drawings in the following description are merely a number of embodiments of the present disclosure, and other drawings may be readily conceivable to those ordinary skilled people in the art from these drawings. 
         FIG. 1( a )  is a structural schematic view of a positioner in the prior art. 
         FIG. 1( b )  is a top view of a positioner in the prior art. 
         FIG. 2( a )  is a structural schematic view of a positioner according to an embodiment of the present disclosure. 
         FIG. 2( b )  is another structural schematic view of a positioner according to an embodiment of the present disclosure. 
         FIG. 2( c )  is yet another schematic structural view of a positioner according to an embodiment of the present disclosure. 
         FIG. 3  is a schematic structural view of a positioner according to an embodiment of the present disclosure which comprises a bottom plate and a side plate. 
         FIG. 4( a )  is a structural schematic view of a positioner according to an embodiment of the present disclosure which comprises a first guide structure. 
         FIG. 4( b )  is another structural schematic view of a positioner according to an embodiment of the present disclosure which comprises a first guide structure. 
         FIG. 4( c )  is yet another structural schematic view of a positioner according to an embodiment of the present disclosure which comprises a first guide structure. 
         FIG. 4( d )  is yet another structural schematic view of a positioner according to an embodiment of the present disclosure which comprises a first guide structure. 
         FIG. 5( a )  is a structural schematic view of a positioner according to an embodiment of the present disclosure, in which the positioner comprises a bar-shaped protrusion on a first side face thereof. 
         FIG. 5( b )  is another structural schematic view of a positioner according to an embodiment of the present disclosure, in which the positioner comprises a bar-shaped protrusion on a first side face thereof. 
         FIG. 6  is a structural schematic view of a positioner according to an embodiment of the present disclosure, in which the magnetic member of the positioner comprises a plurality of magnetic bars. 
         FIG. 7  is a structural schematic view of a positioner according to an embodiment of the present disclosure, in which a rubber pad is attached to the bottom face of the positioner. 
         FIG. 8  is a structural schematic view of a positioner according to an embodiment of the present disclosure, in which the positioner comprises an opening. 
         FIG. 9  is a structural schematic view of a positioning equipment according to an embodiment of the present disclosure. 
         FIG. 10  is a structural schematic view of a positioning equipment according to an embodiment of the present disclosure, in which a magnetic platform of the positioning equipment comprises a second guide structure. 
         FIG. 11  is a structural schematic view of a positioning equipment according to an embodiment of the present disclosure, in which the magnetic platform of the positioning equipment comprises a side wall. 
         FIG. 12( a )  is a structural schematic view of a positioning equipment according to an embodiment of the present disclosure, in which the magnetic platform of the positioning equipment comprises one side wall. 
         FIG. 12( b )  is a structural schematic view of a positioning equipment according to an embodiment of the present disclosure, in which the magnetic platform of the positioning equipment comprises two side walls. 
         FIG. 12( c )  is a structural schematic view of a positioning equipment according to an embodiment of the present disclosure, in which the magnetic platform of the positioning equipment comprises three side walls. 
     
    
    
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS 
     The embodiments of the present disclosure will now be described in conjunction with the accompanying drawings in the present disclosure, and it will be apparent that the described embodiments are merely part of the embodiments and not all of the embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of this disclosure. 
     An exemplary positioner is shown in  FIG. 1 ( a )  and  FIG. 1 ( b ) . An operation principle thereof is described as follows: after placing a polarizer at a bottom of a stocker, the bottom of the stocker being provided with a groove in which a nut is contained, firstly tightening two first screws  10  with the nut in the groove to secure the positioner at the bottom of the stocker and then threading two second screws  20  against a bottom baffle  30  to press the baffle  30  against the bottom of the stocker, achieving the function of fixing the polarizer. 
     An embodiment of the present disclosure provides a positioner  01 , as shown in  FIGS. 2 and 3 . The positioner  01  includes a bottom face  401  and a first side face  501  which are perpendicular and adjacent to each other. The first side face  501  is configured to abut against the work piece to be positioned so as to position the work piece to be positioned. The bottom face  401  is provided with a magnetic member  60  thereon. 
     It is to be noted that, firstly, there is no limitation to the shape of the positioner  01 , as long as the positioner  01  includes a bottom face  401  and a first side face  501  which are perpendicular and adjacent to each other. The positioner  01  may further include one or more faces in addition to the bottom face  401  and the first side face  501 . There is no limitation to shapes of the other faces of the positioner  01  and the relationship between the other faces with the bottom face  401  and the first side face  501 . By way of example, the positioner  01  may be shaped as a right-angled triangular prism as shown in  FIG. 2 ( a ) , or may be shaped as a cube as shown in  FIG. 2 ( b ) ; of course, it may be irregularly shaped as shown in  FIG. 2 ( c )  which comprises the bottom face  401  and first side face  501  perpendicular and adjacent to each other. 
     Secondly, the magnetic member  60  may be provided on an outer side of the bottom face  401  or may be provided on an inner side of the bottom face  401 . Here, the positioner  01  may be placed on a magnetic platform with a magnetic adsorption therebetween, thereby positioning the work piece to be positioned which is placed on the magnetic platform. Since a distance between the magnetic member  60  and the magnetic platform is minimized and an adsorption force between the magnetic member  60  and the magnetic platform is the maximized when the magnetic member  60  is disposed on the outer side of the bottom face  401 , the magnetic member  60  may be optionally provided on the outer side of the bottom face  401   
     Here, it is possible that the magnetic member  60  itself has a magnetic adsorption capacity or the magnetic member  60  includes a magnetic substance. By way of example, when the positioner  01  perform an positioning operation on the work piece placed on the magnetic platform; if the magnetic platform comprises ferromagnetic materials such as iron, cobalt, nickel, ferrite, the magnetic member  60  comprises a magnet; if the magnetic platform comprise a magnet, the magnetic member  60  comprises ferromagnetic materials such as iron, cobalt, nickel, ferrite. On such a basis, the magnetic member  60  may be a pure magnet, or the magnetic member  60  may include a magnet and other substances; or the magnetic member  60  may be completely made of ferromagnetic materials such as iron, cobalt, nickel, ferrite, it is also possible that the magnetic member  60  includes a ferromagnetic material such as iron, cobalt, nickel or ferrite and other non-ferromagnetic materials. There is no specific limitation thereto, but it should be ensured that the magnetic member  60  may cause the positioner  01  and the magnetic platform to be adsorbed to each other. 
     In addition, it is possible that the magnetic member  60  is unitary or a plurality of mutually independent sub-magnetic members. 
     Thirdly, there is no limitation to the work piece to be positioned. For example, the work piece to be positioned may be a polarizer, a diffusion sheet, or a light guide plate in a display device, which may be positioned by the positioner  01  according to the embodiment of the present disclosure. 
     The positioner  01  may position one work piece to be positioned or a plurality of laminated work pieces to be positioned which are of the same size and shape. 
     Fourthly, there is no limitation to the material of the positioner  01 . For example, a metal material such as aluminum or an aluminum alloy may be used. 
     A positioner is provided by the embodiments of the present disclosure. When the positioner  1  performs a positioning operation on the work piece placed on the magnetic platform, as the bottom face  401  of the positioner  01  is provided with a magnetic member  60  which allows the positioner  01  to be adsorbed onto the magnetic platform. Further, when the first side face  501  of the positioner  01  is abutted against the work piece to be positioned, the work piece to be positioned may be positioned by the positioner  01 . The positioner  01  in the prior art includes four screws, while the positioner  01  according to the present disclosure has a simpler structure. Further, when performing the positioning operation, it is only necessary to abut the first side face thereof against the work piece to be positioned, such that the positioning process is easier. On such a basis, it is necessary to thread the screws of the positioner  01  in the prior art when performing a positioning operation, which leads to screw slippage or deformation, resulting in a tilt of screws, and then resulting a damage to an edge of the work piece to be positioned when the work piece is taken out. On the other hand, the bottom face  401  and the first side face  501  of the positioner  01  provided by the embodiment of the present disclosure are kept perpendicular to each other, so that it is possible to prevent the work piece to be positioned from being damaged when the work piece to be positioned is removed. 
     Optionally, as shown in  FIG. 3 , the positioner  01  includes a bottom plate  40  and a side plate  50  which are arranged in a L-shape. The bottom plate  40  comprises the bottom face  401 , and the side plate  50  comprises the first side face  501 . 
     The magnetic member  60  may be provided on the lower surface of the bottom plate  40  or may be provided on the upper surface of the bottom plate  40 , and of course may be provided in the bottom plate  40 . Wherever the magnetic member  60  is provided at the bottom plate  40 , it should be ensured that the magnetic member  60  may cause the positioner  01  and the magnetic platform to be adsorbed to each other. 
     Here, the bottom plate  40  and the side plate  50  may be integrally molded to simplify the manufacturing process of the positioner  01 . 
     In an embodiment of the present disclosure, after the magnetic member  60  causes the positioner  01  and the magnetic platform to be adsorbed together, positioning to the work piece to be positioned may be achieved by abutting the first side face  501  against the work piece to be positioned, as long as the positioner  01  includes the bottom face  401  and the first side face  501  which are perpendicular and adjacent to each other. On the other hand, when the positioner  01  includes the bottom plate  40  and the side plate  50 , not only may the positioning to the work piece to be positioned be achieved, but also may the material required for the positioner  01  be reduced, which simplifies the structure of the positioner  01  and saves the cost of production. 
     Optionally, as shown in  FIGS. 4( a ), 4( b ), 4( c ) and 4( d ) , the positioner  01  further includes a first guide structure  402  which is provided on the bottom face  401  thereof, and configured to guide the positioner  01  when the positioner is moved. 
     There is no limitation to the specific structure of the first guide structure  402 , as long as the first guide structure  402  is able to guide the positioner  01  when the positioner  01  is moved. Here, the first guide structure  402  cooperates with the guide structure on the magnetic platform so as to move the positioner  01  in a preset direction. For example, the first guide structure  402  may be a guide beam provided on the bottom face  401  as shown in  FIGS. 4 ( a ) ,  4  ( b ) and  4  ( d ), and the magnetic platform is provided with a guide groove, or the first guide structure  402  may also be a guide groove provided on the bottom face  401  as shown in  FIG. 4 ( c ) , while a guide beam is provided on the magnetic platform. 
     It should be noted that, the bottom plate  40 , the side plate  50  and the first guide structure  402  may be integrally molded to simplify the manufacturing process of the positioner  01  in case that the positioner  01  includes the bottom plate  40 , the side plate  50  and the first guide structure  402 . 
     In an embodiment of the present disclosure, the first guide structure  402  is provided on the bottom face  401  of the positioner  01 , so that the first guide structure  402  cooperates with the second guide structure on the magnetic platform, such that the positioner  01  may be moved on the magnetic platform in the preset direction, which prevents the direction of the positioner  01  from being changed during the movement of the positioner  01  and ensures that the first side face  501  of the positioner  01  is abutted against the work piece to be positioned. 
     Optionally, as shown in  FIGS. 4( a ), 4( b ) and 4( d ) , the first guide structure  402  is a guide beam provided on the bottom face  401 . 
     There is no limitation to the number of guide beams provided on the bottom face  401 , as long as the positioner  01  may be smoothly moved on the magnetic platform. For example, it is possible that, as shown in  FIG. 4 ( b ) , two guide beams may be provided on the bottom face  401  or as shown in  FIG. 4 ( d ) , one guide beam may be provided on the bottom face  401 . In case that one guide beam is provided on the bottom face  401 , the position and size of the guide beam should be appropriately set so that the positioner  01  may smoothly move on the magnetic platform. 
     If the first guide structure  402  is a guide groove, in order to engage the first guide structure  402  with the second guide structure on the magnetic platform to move the positioner  01  in the preset direction, the guide beam should be provided on the magnetic platform which is engaged with the guide groove. On the other hand, if the guide beam is provided on the magnetic platform, the guide beam will contact and support the work piece to be positioned when the work piece is placed on the magnetic platform, it is thus possible that the work piece to be positioned is not stable, which is harmful for an accurate positioning of the work piece to be positioned. On such a basis, one option is that the first guide structure  402  is a guide beam provided on the bottom face  401 . 
     Further as shown in  FIG. 4( b ) , the number of the guide beams is at least two and they are arranged parallel to each other. 
     In the embodiment of the present disclosure, two or more guide beams are provided on the bottom face  401  and are parallel to each other. Compared with the case that only one guide beam is provided on the bottom face  401 , the configuration of two or more guide beams may ensure that the positioner  01  may smoothly move on the magnetic platform. 
     Optionally, as shown in  FIGS. 5( a ) ,  5  ( b ) and  6 , the first side face  501  includes a bar-shaped protrusion  5011 . 
     It should be noted that it is illustrated in  FIG. 5 ( b )  that the positioner  01  includes a bottom plate  401  and a side plate  501  as an example, but the positioner  01  is not limited to this configuration. 
     There is no limitation to the shape of the bar-shaped protrusion  5011 , and a side of the bar-shaped protrusion  5011  near the work piece to be positioned may be a planar face or a circular arc face. In addition, there is no limitation to the number of the bar-shaped protrusions  5011  included in the first side face  501 . The first side face  501  may include one bar-shaped protrusion  5011 , or two or more bar-shaped protrusions  5011 . The length of the bar-shaped protrusion  5011  may be less than or equal to the height of the first side face  501  in a direction perpendicular to the bottom face  401 . 
     On such a basis, there is no limitation to the angle between the intersection lines of the bar-shaped protrusions  5011  with the bottom face  401  and the first side surface  501 . It may be provided perpendicularly or obliquely. It is illustrated in  FIGS. 5 ( a )  and  5  ( b ) that the angle between the intersection lines of the bar-shaped protrusions  5011  with the bottom face  401  and the first side surface  501  is a right angle as an example. 
     In an embodiment of the present disclosure, the first side face  501  includes a bar-shaped protrusion  5011  such that a contact area of the work piece to be positioned and the first side face  501  of the retainer  01  is reduced when the work piece to be positioned is positioned by the positioner. In case that the work piece is removed after it is positioned by the positioner, as the contact area between the work piece to be positioned and the first side face  501  of the positioner  01  is reduced, the risk of damaging to the work piece to be positioned will be reduced. 
     Further optionally, as shown in  FIG. 6 , the side of the bar-shaped protrusion  5011  abutting against the work piece to be positioned is a circular arc face. 
     In case that the side of the bar-shaped protrusion  5011  which abuts against the work piece to be positioned is a circular arc surface, the work piece to be positioned is in line contact with the bar-shaped protrusion  5011 , then the contact area between the bar-shaped protrusion  5011  and the work piece to be positioned is minimized, so that it is possible to further reduce the risk of the damage to the work piece to be positioned when the work piece to be positioned is removed. 
     Optionally, as shown in  FIGS. 5( a ) and 5( b ) , the bar-shaped protrusions  5011  extend from one side of the first side face  501  to the other side of the first side face  501  along the direction perpendicular to the bottom face  401 . 
     If the length of the bar-shaped protrusion  5011  is the same as the height of the first side face  501  in the direction perpendicular to the bottom face  401 , the number of the work piece to be positioned by the positioner  01  is maximized. On such a basis, the length of the bar-shaped protrusion  5011  is minimized when the bar-shaped protrusion  5011  is perpendicular to the intersection of the bottom face  401  and the first side face  501 . Therefore, in case that the bar-shaped protrusion  5011  extends from one side of the side face  501  to the other side of the side face  501  in the direction perpendicular to the bottom face  401 , not only may the number of the work piece to be positioned by the positioner  01  be maximized, but also may the material required to produce the bar-shaped protrusions  5011  be minimized and the production cost will be saved. 
     Optionally, as shown in  FIG. 6 , the magnetic member  60  includes a plurality of mutually independent magnetic bars  601 . 
     In the case that the area for arranging the magnetic member  60  on the bottom surface  401  is the same, compared with the arrangement that the magnetic member  60  is in a single block, the magnetic member  60  of the present disclosure includes a plurality of mutually independent magnetic bars  601 , reducing the area of the bottom face  401  occupied by the magnetic member  60 , then reducing the adsorption force of the magnetic member  60  to the magnetic platform, facilitating removal of the positioner  01  from the magnetic platform. 
     Optionally, as shown in  FIG. 7 , the positioner  01  further includes a rubber pad  70  attached to the bottom face  401 . 
     It will be appreciated by those skilled in the art that, if the magnetic member  60  is disposed on the outside of the bottom face  401 , the thickness of the rubber pad  70  should be greater than or equal to the thickness of the magnetic member  60  to ensure that the rubber pad  70  may be brought into contact with the magnetic platform  70 ; if the magnetic member  60  is disposed on the inner side of the bottom face  401 , a rubber pad  70  may be provided on the outer side of the bottom face  401 . In addition, in case that the first guide structure  402  is provided on the bottom surface  401 , the first guide structure  402  and the rubber pad  70  should not be overlapped. 
     In the embodiment of the present disclosure, the rubber pad  70  is attached to the bottom face  401  of the positioner  01  to increase a frictional force between the positioner  01  and the magnetic platform so as to prevent the positioner  01  from moving after it performs a position operation to the work piece to be positioned. Therefore, the positioner  01  is fixed tightly onto the magnetic platform, improving the stability of the positioner  01 , and has a good positioning function. 
     Optionally, as shown in  FIG. 8 , the positioner  01  includes an opening  80  which is configured to place the positioner  01  on a magnetic platform or take the positioner  01  away from the magnetic platform. 
     The opening  80  may be provided on the first side face  501  as shown in  FIG. 8 , or may be provided on any faces of the positioner  01  other than the bottom face  401 . Here, the opening  80  should be sized such that it is accessible by human hands to facilitate placing the positioner or removing the same. 
     In the embodiment of the present disclosure, the opening  80  is provided on the positioner  01  so that the positioner  01  may be easily removed or placed when the work piece to be positioned is positioned by the positioner  01 . 
     The embodiment of the present disclosure also provides a positioning equipment, as shown in  FIG. 9 , including a magnetic platform  02  for placing the work piece to be positioned  03 , and the above-mentioned positioner  01  being adapted to be adsorbed to the magnetic platform  02  through the magnetic member  60  provided on the bottom face  401 , the first side face  501  being configured to abut against the work piece to be positioned  03  so as to position the work piece to be positioned  03 . 
     The positioning process of the positioning equipment to the work piece to be positioned  02  is described as follows: firstly removing the positioner  01  from the positioning equipment, and then placing the work piece to be positioned  03  onto the magnetic platform  02  as required. After the work piece to be positioned  03  is placed, placing the positioner  01  onto the magnetic platform  02  and moving the positioner  01  so that the first side face  501  of the positioner  01  abuts against the work piece to be positioned  03 . Since the magnetic member  60  on the bottom face  401  of the positioner  01  allows the positioner  01  to be adsorbed onto the magnetic platform  02 , the positioner  01  is tightly fixed onto the magnetic platform  02  so that the work piece  03  may be positioned. 
     Here, when the positioning equipment is used to position the work piece to be positioned, the number of the positioners  01  should be appropriately set as necessary. For example, in case that the work piece to be positioned  03  is rectangular, if the four sides of the work piece to be positioned  03  are not fixed, at least one positioner  01  may be provided respectively on each one of the four sides of the work piece to be positioned  03 . If one side of the work piece to be positioned  03  is fixed, at least one positioner  01  may be provided on each of the rest three sides of the work piece to be positioned  03 , and so on, and will not be described in detail here. 
     Here, the positioner  01  is placed on the magnetic platform  02 , and the magnetic member  60  may be in contact with the magnetic platform  02  or may not be in contact with the magnetic platform  02 , as long as the magnetic member  60  may cause the positioner  01  to be attracted on the magnetic platform  02 . 
     In an embodiment of the present disclosure, there is provides a positioning equipment. As the positioning equipment comprises a magnetic platform  2 , the positioner  01  may be attracted onto the magnetic platform  02  through the magnetic member  60  provided on the bottom face  401  when the positioner  01  is placed onto the magnetic platform  02 , so that the positioner  01  may be fixed onto the magnetic platform  02 . On such a basis, when the work piece to be positioned  03  is placed on the magnetic platform  02 , and the first side face  501  of the positioner  01  is abutted against the work piece to be positioned  03 , the work piece to be positioned  03  may be positioned by the positioner  01 . The positioner  01  in the prior art includes four screws, while the positioner  01  according to the present disclosure has a simpler structure. Further, when performing the positioning operation, it is only necessary to abut the first side face against the work piece to be positioned, such that the positioning process is easier. On such a basis, it is necessary to thread the screws of the positioner  01  in the prior art when performing a positioning operation, which leads to screw slippage or deformation, resulting in a tilt of screws, and then resulting damage to an edge of the work piece to be positioned when the work piece is taken out. On the other hand, the bottom face  401  and the first side face  501  of the positioner  01  provided by the embodiment of the present disclosure are kept perpendicular to each other, so that it is possible to prevent the work piece to be positioned from being damaged when the work piece to be positioned is removed. 
     Optionally, as shown in  FIG. 10 , the second guide structure  021  is provided on the magnetic platform  02 , and the positioner  01  further includes a first guide structure  402  provided on the bottom face  401 . The second guide structure  021  cooperates with the first guide structure  402  disposed on the bottom face  401  of the positioner  01  so that the positioner  01  is moved in the preset direction with respect to the magnetic platform  02 . 
     There is no limitation to the specific structure of the first guide structure  402  and the second guide structure  021 , as long as the first guide structure  402  and the second guide structure  021  may be engaged so that the positioner  01  is moved in the preset direction with respect to the magnetic stage  02 . For example, the first guide structure  402  may be a guide beam provided on the bottom face  401 , while the second guide structure  021  may be a guide groove provided on the magnetic platform  02 ; or the first guide structure  402  may be a groove provided on the bottom face  401 , while the second guide structure  021  may be a guide beam provided on the magnetic platform  02 . 
     In the embodiment of the present disclosure, the second guide structure  021  is provided on the magnetic platform  02  and the second guide structure  021  cooperates with the first guide structure  402  so that the positioner  01  may move in the preset direction on the magnetic platform  02 , preventing the direction of the positioner  01  from changed during the movement of the positioner  01 , and ensuring that the first side face  501  of the positioner  01  is abutted against the work piece to be positioned. 
     Optionally, the first guide structure  402  is a guide beam and the second guide structure  021  is a guide groove. 
     When the first guide structure  402  is the guide beam and the second guide structure  021  is the guide groove, the first guide structure  402  and the second guide structure  021  may be engaged to move the positioner  01  along the guide groove. Finally the first side face  501  of the positioner  01  is brought into contact with the work piece to be positioned  03  and position the work piece to be positioned  03 . 
     Optionally, as shown in  FIGS. 11 and 12 , the magnetic platform  02  includes a bottom plate  022  and at least one side wall  023  provided on the bottom plate  022 . The first side face  501  of the positioner  01  and the side wall  023  of the magnetic platform  02  serve to abut against the work piece to be positioned  03  so as to position the work piece to be positioned  03 . 
     The magnetic platform  02  may include one side wall  023 , or may include two or three side walls  023 . There is no limitation thereto. 
     It should be noted that, as shown in  FIG. 12 ( a ) , if the magnetic platform  02  includes one side wall  023 , one side of the work piece to be positioned  03  may abut against one side wall  023  of the magnetic platform  02  when the work piece to be positioned  03  is placed. Therefore, at least three positioners  01  are required to position the work piece to be positioned  03  when positioning the work piece to be positioned  03 . The first side face  501  of each positioner  01  abuts against the work piece to be positioned  03 . As shown in  FIG. 12 ( b ) , if the magnetic platform  02  includes two side walls  023 , two sides of the work piece to be positioned  03  are abutted against two side walls  023  of the magnetic platform  02 , respectively, when the work piece to be positioned  03  is placed. Therefore, at least two positioners  01  are required to position the work piece to be positioned  03  when positioning the work piece to be positioned  03 . The first side face  501  of each positioner  01  abuts against the work piece to be positioned  03 . As shown in  FIG. 12 ( c ) , if the magnetic platform  02  includes three side walls  023 , and the distance between two opposite side walls  023  of the three side walls  023  is the same as the length or width of the work piece to be positioned  03 , three sides of the work piece to be positioned  03  are abutted against three side walls  023  of the magnetic platform  02 , respectively, when the work piece to be positioned  03  is placed. Therefore, at least one positioner  01  is required to position the work piece to be positioned  03  when positioning the work piece to be positioned  03 . The first side face  501  of the positioner  01  abuts against the work piece to be positioned  03 . It should be noted that if the magnetic platform  02  includes three side walls  023 , it is easy to damage the work piece to be positioned  03  when the work piece to be positioned  03  is placed on the magnetic platform  02 . Therefore, one option is that the magnetic platform  02  comprises one or two side walls  023 . 
     In the embodiment of the present disclosure, since the magnetic platform  02  includes a side wall  023 , the work piece to be positioned  03  may be positioned by combination of the side wall  023  and the positioner  01 , so that the number of the positioners  01  required in the positioning process to the work piece to be positioned  03  will be reduced. 
     Optionally, the height of the side wall  023  of the magnetic platform  02  is the same as the height of the first side face  501  of the positioner  01 . 
     In the embodiment of the present disclosure, the height of the side wall  023  of the magnetic platform  02  is the same as the height of the first side face  501  of the positioner  01 , so that the thickness of the plurality of work piece to be positioned  03  by combination of the side wall  023  and the positioner  01  is the same as the height of the side wall  023  of the magnetic platform  02  or the height of the first side face  501  of the positioner  01 . Therefore, the number of the work piece to be positioned  03  may be maximized. 
     Above described are only some specific embodiments of the present disclosure, although the protect scope of the present disclosure is not limited thereto. Those skilled in the art will readily conceive modifications or alternative within the technical scope in this disclosure. Accordingly, the protection scope of the present disclosure should be defined by the claims and their equivalents.