You are an expert at summarizing long articles. Proceed to summarize the following text:

You are an expert at summarizing long articles. Proceed to summarize the following text: 
BACKGROUND OF THE PRESENT INVENTION  
       [0001]     1. Field of Invention  
         [0002]     The present invention relates to a display box, and more particularly to a display box which has an easy-to-reach compartment, allowing the storage and safe-keeping of important documents, such as warranty certificate and user manual, such that such documents will not be easily lost when the item on display is being displayed.  
         [0003]     2. Description of Related Arts  
         [0004]     Display boxes have always played a very important role in the sales of jewelry and other accessories such as watches. The primary function they serve is to hold a display piece such as jewelry or watch at a time to nicely display the jewelry or watch to potential buyers. They help protecting a display piece from being damaged by other display pieces when many of such display pieces are being displayed at the same time.  
         [0005]     They also enhance the presentation of the display piece than the display piece itself can offer. Without display boxes, any piece of jewelry would not look as classy or desirable than they should. Unfortunately, these two functions are pretty much what conventional display boxes could offer.  
         [0006]     People who have done jewelry shopping, such as necklaces, bracelets, watches and so forth, must have seen sales persons struggling to free the piece of display piece from the display box when the shopper wished to take a full look of the piece of jewelry, or the sales persons simply are not allowed to detach the display piece from the display box for security reasons, such that the shopper has to look at the piece of item with the display box attached, turning the box around ridiculously together with the display piece therein, and not being able to take a good look of the display piece.  
         [0007]     When the shoppers finally do purchase the piece of jewelry, they must also have seen the sales person either reaching somewhere else, such as a drawer in the store, for important documents such as the warranty certificate and/or the user manual, or, trying very hard to open up the display layer of the box to reach the documents that are well-hidden and yet difficult-to-reach.  
         [0008]     Furthermore, even the piece of jewelry is purchased with the display box, after a certain period of time, the documents would be lost and no where to be found, simply because of the fact that the conventional display boxes do not offer a good protection to such important documents.  
         [0009]     In view of the above drawbacks of and the problems brought on by conventional display boxes, a better display box has to be provided so as to not only provide a protection to the display piece placed therein, better security of and convenience to reach the display piece, but also provide secured and easy-to-reach storage of important documents.  
       SUMMARY OF THE PRESENT INVENTION  
       [0010]     A main object of the present invention is to provide a display box for displaying a display piece, comprising a box body having a receiving compartment, a base cover to enclose the receiving compartment, and a display arrangement comprises a display stand, and a folding panel, wherein the display stand pivots between a display position and an accessing position to allow access of the display piece and a hidden cavity.  
         [0011]     Another object of the present invention is to provide a display box, wherein the hidden cavity is provided for the safe-keeping of documents, such as the warranty certificate or user manual of the display piece.  
         [0012]     Another object of the present invention is to provide a display box allowing important documents of the display piece being stored together with the display piece, avoiding mixing up of important documents of other jewelry items, or loosing of the important document.  
         [0013]     Another object of the present invention is to provide a display box, wherein when the folding panel is in the display position, the display piece cannot be taken out therefrom and the hidden cavity is inaccessible, such that both the display piece and the document within the hidden cavity are both securely and safely stored.  
         [0014]     Another object of the present invention is to provide a display box, wherein the display stand is flexible, such that the display box is capable of displaying display pieces of different nature, size and shape.  
         [0015]     Another object of the present invention is to provide a display box which not only allows the display piece and the documents to be safely stored but also easy to be accessed such that the display piece and the document can be taken out simply by pivoting the display panel from the display position to the accessing position.  
         [0016]     Another object of the present invention is to provide a display box, wherein forced is required to pivot the display panel from the display position to the accessing position, such that the box cover will not accidentally open up during handling or transportation.  
         [0017]     Another object of the present invention is to provide a display box, further comprises a locking unit, such that display piece can be secured on the display stand, so as to prevent the display piece from being taken out from the display box in an unauthorized manner.  
         [0018]     Another object of the present invention is to provide a display box, wherein the locking unit is hidden when the folding panel is in the display position, such that it is inaccessible and hence effectively prevents the display piece from being taken in an unauthorized manner, and is easily accessible when the box cover is in the opened position.  
         [0019]     Accordingly, in order to accomplish the above objects, the present invention provides a display box for storing and displaying a display piece, comprising:  
         [0020]     a box body having a receiving compartment;  
         [0021]     a box cover covering on the box body to enclose the receiving compartment; and  
         [0022]     a display arrangement, which comprises:  
         [0023]     a display stand adapted for detachably holding the display piece in position; and  
         [0024]     a folding panel having a mounting edge extended from the display stand and a pivot edge pivotally connecting to a surrounding wall of the box body to form a hidden cavity within the receiving compartment at a position underneath the folding panel such that the display stand is adapted to fold between a display position and an accessing position, wherein at the display position, the folding panel is pivotally folded within the receiving compartment to enclose the hidden cavity so as to retain the display stand within the receiving compartment for securely holding the display piece in the box body, and at the accessing position, the folding panel is pivotally folded to lift up the display stand from the receiving compartment to expose the hidden cavity such that the display stand is allowed for the display piece detaching therefrom.  
         [0025]     These and other objectives, features, and advantages of the present invention will become apparent from the following detailed description, the accompanying drawings, and the appended claims.  
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0026]      FIG. 1  is a prospective view of a display box according to the preferred embodiment of the present invention.  
         [0027]      FIG. 2  illustrates the box cover and the box body according to the above preferred embodiment of the present invention.  
     
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT  
       [0028]     Referring to  FIG. 1  and  FIG. 2  of the drawings, a display box for displaying a display piece according to a preferred embodiment of the present invention is illustrated, wherein the display box comprises a box body  10 , and a box cover  20 , and a display arrangement  30 .  
         [0029]     The box body  10  has a receiving compartment  11  and a surrounding wall  12 . The box cover  20  is provided for covering the box body  10  to enclose the receiving compartment  11 .  
         [0030]     The display arrangement  30  comprises a display stand  31  and a folding panel  32 , wherein the display stand  31  is adapted for detachably holding the display piece  5  in position. The folding panel  32  has a mounting edge  321  and a pivot edge  322 .  
         [0031]     The mounting edge  321  of the folding panel  32  extends from the display stand  31 , while the pivot edge  322  is pivotally connected to the surrounding wall  12  of the box body  10 . The positions of the mounting edge  321  and the pivot edge  322  effectively creates a hidden cavity  13  within the receiving compartment  11  at a position underneath the folding panel  32 .  
         [0032]     Essentially, the display stand  31  is adapted to fold between a display position and an accessing position, such that the display piece  5  is safely in place when the display stand  31  is in the display position, and can be taken out from the display stand  31  when the display stand  31  is in the accessing position.  
         [0033]     While the display stand  31  is in the display position, the folding panel  32  is pivotally folded within the receiving compartment  11  to enclose the hidden cavity  13 . As a result, the display stand  31  is retained within the receiving compartment  11  for securely holding the display piece  5  in the box body  10 .  
         [0034]     The hidden cavity  13  is also complete hidden from the viewers or users when the display stand  31  is in the display position. It is worth mentioning that the hidden cavity  13  is completely shielded from the users or viewers. Without moving the display stand  31  from the display position into the accessing position, presence of the hidden cavity  13  is completely undetectable.  
         [0035]     And when the display stand  31  is at the accessing position, the folding panel  32  is pivotally folded to lift up the display stand  31  from the receiving compartment  11  to expose the hidden cavity  13 , such that the display stand  31  is allowed for the display piece  5  to be detached from the display stand  31  for examination or better viewing. And since the hidden cavity  13  is now enclosed, any materials placed within the hidden cavity  13  can now be accessed or taken out of the hidden cavity  13 .  
         [0036]     As a result, a second item  9  such as important document like warranty certificate or messages will be safely protected within the hidden cavity  13 . The second item  9  will not fall off from the display box such that they will not be easily lost during transportation, or through mishandling of the display box. Also, the display piece  5  is also well protected by the display box.  
         [0037]     Moreover, despite the fact that the second item  9  is well protected within the lost  13  when the display stand  31  is in the display position, the second item  9  can be easily accessed when desired.  
         [0038]     Unlike conventional display boxes where either no such hidden cavities are available or accessing of the compartments requires difficult pulling apart of the display box when documents are stored in such compartments, all that has to be done to access the second item  9  stored within the hidden cavity  13  is to pivot the display stand  31  from the display position to the accessing position.  
         [0039]     The display stand  31  is substantially mounted to the folding panel  32  to define a bottom disposing portion  323  below the folding panel  32  and an upper exposing portion  324  above the folding panel  32  such that when the folding panel  32  is pivotally folded to the receiving compartment  11  at the display position, the hidden cavity  13  is enclosedly formed within the bottom disposing portion  323  of the display stand  31 , the corresponding surrounding wall  12  of the box body  10 , a bottom wall  14  of the box body and the folding panel  32 .  
         [0040]     The display arrangement  30  further has a partition wall  33  extended from the box body  10  to partition the receiving compartment  11  into the hidden cavity  13  at a position underneath the folding panel  32  such that the folding panel  32  forms an enclosing cover  325  to enclose the hidden cavity  13  when the folding panel  32  is pivotally folded on the partition wall  33 .  
         [0041]     The hidden cavity  13  is provided for accommodating a second item  6  therewithin, such that the second item, such as a certificate of warranty can be bounded within the hidden cavity  13 , by the box body  10 , the corresponding surrounding wall  12 , the enclosing cover  325  and the partition wall  33 . When the second item  6  is placed within the hidden cavity  13 , the second item  6  is well protected such that the second item  6  will not fall off from the display box, be taken out of the display box in an unauthorized manner or be easily reached by external objects. However, the second item  6  can also be reached when required.  
         [0042]     It is worth mentioning that the partition wall  33  has a predetermined height and a top supporting edge  331  provided for substantially supporting the folding panel  32  when the folding panel  32  is pivotally folded to enclose the hidden cavity  13 .  
         [0043]     The display box further has a locking unit  40  provide for locking the display piece  5  at the display stand  31 . The locking unit  40  comprises a locking ring  41  and a breakable locking loop  42 .  
         [0044]     The locking ring  41  is mounted between the mounting edge  321  of the folding panel  32  and the disposing portion  323  of the display stand  31 . The breakable locking loop  42  encircles the disposing portion  323  of the display stand with the locking ring  41  for typing up the display piece  5  with the display stand  31 .  
         [0045]     The reason is that when the folding panel  32  is pivotally folded at the display position, the locking unit  40  is hidden within the receiving compartment for preventing the locking loop  42  to be accessed. And, when the folding panel  32  is pivotally folded at the accessing position, the locking loop is exposed from the receiving compartment, so as to allow the locking loop  42  to be broken for unlocking the display piece  5  with the display stand  31 .  
         [0046]     The function of the locking unit  40 , as can be seen, is to lock the display piece  5  with the display stand  31 . It provides protection for the display piece  5  placed within the display box, such that unauthorized persons cannot easily detach the display piece  5  from the display box.  
         [0047]     Furthermore, the partition wall  33  further has a guiding slot  332 . The guiding slot  332  is indently extended from the top supporting edge  331  of the guiding slot  332  so as to alignedly receive the locking ring  41  in the guiding slot  332  when the folding panel  32  is pivotally folded on the partition wall  33 .  
         [0048]     The guiding slot  332  is provided for ensuring that the display stand  31  and the folding panel  32  can open and close matchingly, so as to concealedly close the hidden cavity  13 , for protecting both the display piece  5  and the second item  6 .  
         [0049]     The box body  10  further has a side platform  14 , which is shaped and sized symmetrical to the folding panel  32 . The side platform  14  is also sidewardly extended from an opposed surrounding wall  15  within the receiving compartment  11  to form a central channel  16  between the side platform  14  and the folding panel  32  so as to receive the display stand  31  in the central channel  16  when the folding panel  32  is folded to enclose the hidden cavity  13 .  
         [0050]     As a result, the display piece  5 , when placed on the display stand, is essentially within the central channel, such that the display piece  5  is in between the folding panel  32  and the side platform  14  providing a protection to the display piece  5 .  
         [0051]     The display box further has a retention unit  50  for retaining the folding panel  32  at the display position. The retention unit  50  has a retention groove  51  and a retention arm  52 .  
         [0052]     The retention groove  51  is indently formed on an inner wall  131  of the hidden cavity  13  and the retention arm  52  has a hooking tip  521  downwardly extended from the folding panel  32  and arranged when the folding panel  32  is pivotally folded to enclose the hidden cavity  13 .  
         [0053]     The hooking tip  521  of the retention arm  52  is then engaged with the retention groove  51  to substantially retain the folding panel  32  in position, which in turn would retain the display piece  5  in a display position, to enhance the presentation of the display piece  5 .  
         [0054]     And, some force has to be applied to the folding panel  32  to lift the display stand  31  upwards, such that the hocking tip  521  of the retention arm  52  is essentially pulled away from the retention groove  51  on the inner wall  131  of the hidden cavity  13  of the box body  10 , such that the folding panel  32  is free to pivot from the display position to the accessing position.  
         [0055]     Hence, it can be seen that the retention unit  50  helps preventing the folding panel  32  from accidentally pivoting into the accessing position, such that the second item  9  is well protected within.  
         [0056]     It is worth mentioning that according to the preferred embodiment of the present invention, the pivot edge  322  of the folding panel  32  is pivotally connected to the box body  10  via a pivot joint  326 .  
         [0057]     The pivot joint  326  comprises a first joint member  3261  and a second member  3262 . The first joint member  3261  is substantially mounted on the surrounding wall  12  of the box body  10 .  
         [0058]     The second member  3262  is substantially mounted on a bottom side  327  of the folding panel  32  at the pivot edge  322  to pivotally connect to the first joint member  3261  such that when the folding panel  32  is pivotally folded at the display position to enclose the hidden cavity  13 , the pivot joint  326  is invisibly hidden within the hidden cavity  13 .  
         [0059]     One skilled in the art will understand that the embodiment of the present invention as shown in the drawings and described above is exemplary only and not intended to be limiting.  
         [0060]     It will thus be seen that the objects of the present invention have been fully and effectively accomplished. It embodiments have been shown and described for the purposes of illustrating the functional and structural principles of the present invention and is subject to change without departure from such principles. Therefore, this invention includes all modifications encompassed within the spirit and scope of the following claims.

Summary:
A display box for displaying a display piece, comprising a box body, a box cover and a display arrangement comprises a display stand, and a folding panel. A hidden cavity is formed by a mounting edge, a pivot edge and a surrounding wall of the box body is allowing the storage and safe-keeping of important documents, such that they will not be easily lost when the display piece is being displayed. The hidden cavity is also simply accessed, such that the important documents are stored safely yet easy to reach. A hidden, yet simply accessed, locking unit is also provided for locking the display piece to the display box, so as to prevent the display piece from being taken out of the display box in an unauthorized manner.