Abstract:
An adjustable tilting packaging box is provided for holding a liquid crystal module. A supporting rack is arranged in the box for carrying the liquid crystal module thereon and is connected to a support element for being mounted on a bottom of the box. The support element includes an adjustment mechanism connected to a side of the supporting rack and includes a support pillar having a lower end selectively positionable on a plurality of levels provided on an end of the pull rod having an opposite end extending outside the box, such that a movement of the pull rod allows different ones of the levels to support the support pillar thereon so as to change a position of the supporting rack to thus change an angular position of the liquid crystal module.

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
       [0001]    This is a divisional application of co-pending patent application Ser. No. 14/007,648, filed on Sep. 25, 2013, which is a national stage of PCT Application Number PCT/CN2013,/080633, filed on Aug. 1, 2013, claiming foreign priority of Chinese Patent Application Number 201310323109.4, filed on Jul. 29, 2013. 
     
    
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
       [0002]    The present invention relates to the field of liquid crystal displaying techniques, and in particular to a packaging box for liquid crystal module. 
       2. The Related Arts 
       [0003]    The manufacturing and transport process includes: transporting open cell to the TV or display manufacturers for assembly, wherein the open cells must be packaged before transportation. As shown in  FIGS. 1 and 2 , the known packaging box includes: paper box, plastic box, and so on. The liquid crystal module  20  and buffering material are stacked in a interleaving manner into a box  10 . As shown in the figures, the open cell  23  is connected to chip on film (COF)  21  and printed circuit board (PCB)  22 . The bumpy transportation may cause crease in COF  21  or the PCB  22  to move under the open cell  22 . With additional vibration, the PCB  22  and the open cell  20  may be scratched to degrade the quality of the product. To solve the above problem, some boxes will include convex platform to separate PCB  22  and open cell  23 . However, during normal access, occasional scratches on the PCB  22  may still occur due to the convex platform and cause damages to the COF  21  or other internal parts and lower the yield rate. 
       SUMMARY OF THE INVENTION 
       [0004]    The technical issue to be addressed by the present invention is to overcome the above problem through suitable adjustment of the angle of placement when placing liquid crystal module to avoid the shift of the PCB during transportation to lower the yield rate. 
         [0005]    The present invention provides an adjustable tilting packaging box for liquid crystal module, which comprises: a box, wherein further comprising: support rack, for carrying the liquid crystal module, the supporting rack being connected to the bottom of the box through first support element; the first support element comprising at least a first adjustment mechanism, connected to a side of the support rack and being resilient and adjustable; wherein the first adjustment mechanism comprising: a first support pillar, a resilient element and a positioning element; wherein the first support pillar being retractably connected to the bottom of the box through the resilient element; the first support pillar being disposed with a resilient buckle matching the positioning element to realize the multi-level rising and lowering of the first support pillar; through the height adjustment of an end of the support rack, the open cell being placed at a specific angle and the weight of PCB preventing shifting during transportation. 
         [0006]    According to a preferred embodiment of the present invention, one end of the first support pillar is connected to a side of the support rack in a hinged manner, and the other end is connected to the resilient element; wherein the resilient element is a spring. 
         [0007]    According to a preferred embodiment of the present invention, the first adjustment mechanism further comprises a first support pillar stop element, wherein the first support pillar stop element is fixed to the bottom of the box, disposed with an opening for inserting the first support pillar at the top; the first support pillar is disposed with an engaging ring at the lower end, and the engaging ring is smaller than the opening and is confined inside the first support pillar stop element. 
         [0008]    According to a preferred embodiment of the present invention, the resilient buckle comprises a spring and a buckle element fixedly connected to one end of the spring; the other end of the spring is fixedly connected to the first support pillar through a via hole disposed on the first support pillar; wherein the buckle element extends partially beyond the first support pillar, the extending part forms a slope shape, comprising a downward slope and an upward flat surface. 
         [0009]    According to a preferred embodiment of the present invention, the positioning element comprises a multi-level positioning board; the positioning board is disposed with positioning hole; the first support pillar passes through the positioning hole; wherein the positioning hole has a diameter smaller than the combined size of the first support pillar and the extending part of the buckle element. 
         [0010]    The present invention provides an adjustable tilting packaging box for liquid crystal module, which comprises: a box, wherein further comprising: support rack, for carrying the liquid crystal module, the supporting rack being connected to the bottom of the box through second support element; the second support element comprising at least a second adjustment mechanism, connected to a side of the support rack and height-adjustable; wherein, the second adjustment mechanism comprising: a second support pillar and a pull rod; wherein one end of the pull rod penetrating a hole disposed at a side of the box and extending to outside of the box, and the other end being disposed with a plurality of levels corresponding to the lower end of the second support pillar; through the retraction of the pull rod and the attachment of the second support pillar, the multi-level rising and lowering of the second support element being realized; through the height adjustment of an end of the support rack, the open cell being placed at a specific angle and the weight of PCB preventing shifting during transportation. 
         [0011]    According to a preferred embodiment of the present invention, the second adjustment mechanism further comprises a second support pillar stop element, wherein the second support pillar stop element is disposed with stop hole corresponding to the second support pillar; the lower end of the first support pillar extends into the hole and the upper end of the second support pillar is connected to a side of the support rack in a hinged manner. 
         [0012]    According to a preferred embodiment of the present invention, the first level, which is relatively higher than the remaining levels, is disposed at the outer end of the pull rod, when the second support pillar and the first level are attached to support, the inner wall of the lower end of the second support pillar stop element is disposed with a stop position to stop the first level. 
         [0013]    According to a preferred embodiment of the present invention, the second adjustment mechanism further comprises a restoration spring, disposed between the side of the first level and the second support pillar stop element, for applying an outward push to the pull rod. 
         [0014]    According to a preferred embodiment of the present invention, the attachment surfaces between the second support pillar and the levels are parallel slope surfaces wherein the slope surface of the level at the outer end is leaning downward towards the end. 
         [0015]    The efficacy of the present invention is that to be distinguished from the state of the art. Through adjusting the placement angle of placing liquid crystal module to make the PCB located at an end of a lower end of a leaning surface, the weight of PCB prevents the PCB from folding up to cause crease in COF or damage to the glass during bumpy transportation. The packaging box avoids damages causing lower yield rate. Also, when in storage or during manufacturing, the packaging box can be adjusted to horizontal level to facilitate manufacturing. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0016]    To make the technical solution of the embodiments according to the present invention, a brief description of the drawings that are necessary for the illustration of the embodiments will be given as follows. Apparently, the drawings described below show only example embodiments of the present invention and for those having ordinary skills in the art, and other drawings may be easily obtained from these drawings without paying any creative effort. In the drawings: 
           [0017]      FIG. 1  is a schematic top view showing the liquid crystal module in a known packaging box; 
           [0018]      FIG. 2  is a schematic view showing the stacking of the liquid crystal modules in a known packaging box; 
           [0019]      FIG. 3  is a schematic view showing the stacking of the liquid crystal modules in a packaging box according to the first embodiment of the present invention; 
           [0020]      FIG. 4  is a schematic view showing the structure of the first support element according to the first embodiment of the present invention; 
           [0021]      FIG. 5  is a schematic view showing the stacking of the liquid crystal modules in a packaging box according to the second embodiment of the present invention; and 
           [0022]      FIG. 6  is a schematic view showing the structure of the second support element according to the first embodiment of the present invention. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0023]    The following description refers to the embodiments and drawings of the present invention. 
       First Embodiment 
       [0024]    As shown in  FIGS. 3 and 4 , the adjustable tilting packaging box for liquid crystal module comprises a box  10  and an upper lid  12 . The liquid crystal modules  20  are stacked and loaded on the support rack  30 . The support rack  30  is connected to the bottom  11  of the box  10  through the first support element. As shown in the figures, first support element comprises two sets. One end of a set is fixed to the bottom  11  of the box  10  and the other end is connected to the support rack  30  in a hinged manner, shown as A in the figure. The other set is connected to the other side of the support rack  30 , and is a resilient adjustable first adjustment mechanism  40 , wherein the first adjustment mechanism comprises a first support pillar  41 , a resilient element  42  and a positioning element  43 . The first support pillar  41  is retractably connected to the bottom  11  of the box  10  through the resilient element  42 . The first support pillar  41  is disposed with a resilient buckle  44  matching the positioning element  43  to realize the multi-level rising and lowering of the first support element. The following will describe each component in details. 
         [0025]    One end of the first support pillar  41  is connected to a side of the support rack  30  in a hinged manner, and the other end is connected to the resilient element  42 . In the instant embodiment, the resilient element  42  is a spring, which is to apply an upward force to the first support pillar  41 . Also to fix the position of the first support pillar  41 , a first support pillar stop element  45  is disposed. The first support pillar stop element  45  is fixed to the bottom  11  of the box  10 . The top of the first support pillar stop element  45  is disposed with an opening  451  for inserting the first support pillar  41 . The lower end of the first support pillar  41  is disposed with an engaging ring  46 . The engaging ring  46  is smaller than the opening  451  and is confined inside the first support pillar stop element  45 . As such, the two ends of the first support pillar  41  are correspondingly fixed or stopped, and the first support pillar  41  can only move up and down within a specific range. The resilient buckle  44  comprises a spring  441  and a buckle element  442  fixedly connected to one end of the spring  441 ; the other end of the spring  441  is fixedly connected to the first support pillar  41  through a via hole  47  disposed on the first support pillar  41 . The buckle element  442  extends partially beyond the first support pillar  41 . The extending part forms a slope shape, comprising a downward slope and an upward flat. Also referring to the positioning element  43 , the positioning element  43  comprises a multi-level positioning board  431 . In the instant embodiment, the number of levels is two. The positioning board  431  is disposed with positioning hole  432 . The first support pillar  41  passes through the positioning hole  432 , wherein the positioning hole  432  has a diameter smaller than the combined size of the first support pillar  41  and the extending part of the buckle element  442 . As such, the first support pillar  41  disposed with a buckle element  442  can only move in one direction. 
         [0026]    Also referring to  FIG. 4 , under the effect of the spring, a push is applied to the first support pillar  41 . On the other hand, under the effect of the buckle element  442  and positioning board  431 , the first support pillar  41  is fixed to the position. After stacking liquid crystal modules on the support rack  30 , under the effect of the spring force, the first adjustment mechanism  40  is at a raised position higher than the first support element at the other side of the support rack. The test shows that a tilt at 5°-15° of the support rack can effectively prevent the crease occurrence in COF during transporting liquid crystal modules. Of course, the tilt is made by the raise of the first adjustment mechanism. Fine tuning of tilt for accommodating different transportation environment can be achieved by additional gaps added to the multi-level positioning board  431  and adjusting the gap of the multi-level positioning board  431 . 
         [0027]    For resetting, a tool can be used to press the buckle element  442  back into the first support pillar  41 . As such, the first support pillar  41  can move vertically inside the positioning hole  432 . 
       The Second Embodiment 
       [0028]    The instant embodiment is shown in  FIGS. 5 and 6 . The adjustable tilting packaging box for liquid crystal module comprises a box  10  and an upper lid  12 . The liquid crystal modules  20  are stacked and loaded on the support rack  30 . The support rack  30  is connected to the bottom  11  of the box  10  through the second support element. As shown in the figures, second support element comprises two sets. One end of a set is fixed to the bottom  11  of the box  10  and the other end is connected to the support rack  30  in a hinged manner, shown as B in the figure. The difference is that the other set is connected to the other side of the support rack  30 , and is a height-adjustable second adjustment mechanism  50 ; wherein the second adjustment mechanism  50  comprises a second support pillar  51  and a pull rod  52 . One end of the pull rod  52  penetrates a hole  131  disposed at a side  13  of the box  10  and extending to outside of the box  10 , and the other end of the pull rod  52  is disposed with a plurality of levels corresponding to the lower end of the second support pillar  51 . Through the retraction of the pull rod  52  and the attachment of the second support pillar  51 , the multi-level rising and lowering of the second support element is realized. The following will describe each component in details. 
         [0029]    As shown in the figures, the second adjustment mechanism  50  further comprises a second support pillar stop element  53 , wherein the second support pillar stop element  53  is disposed with stop hole  531  corresponding to the second support pillar  51 . The lower end of the first support pillar  51  extends into the hole  531  and the upper end of the second support pillar  51  is connected to a side of the support rack  30  in a hinged manner for limiting the second support pillar  51  to move upwards and downwards. The first level  521 , which is relatively higher than the remaining levels, is disposed at the outer end of the pull rod  52 . When the second support pillar  51  and the first level  521  are attached to support, the inner wall of the lower end of the second support pillar stop element  53  is disposed with a stop position  532  to stop the first level  521 . To apply an outward push to the pull rod  52 , the instant embodiment further comprises a restoration spring  54 , disposed between the side of the first level  521  of the pull rod  52  and the second support pillar stop element  53 . The attachment surfaces between the second support pillar  51  and the levels are parallel slope surfaces wherein the slope surface of the level at the outer end is leaning downward towards the end. 
         [0030]    Also referring to  FIG. 6 , when the second support pillar  51  is raised, the pull rod  52  can extend and retract in a horizontal direction, that is, to left and right. The stop position  532  further restricts the possibility of the pull rod  52  from further pull out completely. When the pull rod  52  is not under any external force, the restoration spring  54  applies an outward push to the pull rod  52 . As such, when the second support pillar  51  is lowered, the second support pillar  51  will attach to the slope surfaces. If the raised height of the second support pillar  51  is to be lowered, the support rack  30  is raised first, and then a pull hook  31  extending from a side of the support rack  30  can be raised, followed by pushing in the pull rod  52  inwards and finally, the support rack  30  is lowered. As such, the second support pillar  51  will attach to the top surface of the next level so as to achieve the lowering of the second adjustment mechanism  50 . The slope adjustment extent can refer to the first embodiment. 
         [0031]    Embodiments of the present invention have been described, but not intending to impose any unduly constraint to the appended claims. Any modification of equivalent structure or equivalent process made according to the disclosure and drawings of the present invention, or any application thereof, directly or indirectly, to other related fields of technique, is considered encompassed in the scope of protection defined by the clams of the present invention.