Abstract:
The leaves of an artificial Christmas tree are each formed from a length of metal having its opposite ends secured to a tree trunk and a plurality of coils formed along the length thereof and having substantially the configuration of a coiled spring. A reinforcing member may extend through the coils and separate ornaments may be individually hung on selected coils.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention is related to a novel structure for Christmas trees, and especially to the structure of an artificial Christmas tree which can be easily manufactured and conveniently used. 
     2. Description of the Prior Art 
     Christmas is a great festival for western people, and people in the entire world nowadays also celebrate this big festival. Beside those activities of celebration held by various organizations and companies, people deck the halls in families with Christmas trees to welcome Christmas day and add joyful air to it. Christmas trees can be divided into two kinds, one directs to the real trees decorated with various decorations and LED lamp sets; the other directs to the artificial decorated trees taking the places of real trees which are gradually more and more difficult to obtain year by year. And artificial decorated trees used as Christmas trees are gradually popularized. 
     Conventional artificial Christmas trees (please refer to FIGS. 1 and 2) each is comprised mainly of a base A, a trunk B and a lot of branches C. Wherein, the branches C each is made by assembling plastic leaves E on a stem D and is secured individually on the trunk B. When the branches C are assembled on the trunk B, they are inclined downwardly. Hence when users put LED lamp sets F and decorations G thereon, the LED lamp sets F can only be wrapped around smoothly by folding of the branches C, while the decorations G must be hung by bending the branches C. However, bending or folding of the branches C for fixing the LED lamp sets F and the decorations G endues the Christmas trees with the following disadvantages: 
     1. The branches C of the Christmas trees are mounted together with the plastic leaves E when the stems D are twisted for fixing the plastic leaves E. The plastic leaves E are elongated and flat, they shall be equidistantly fixed on each stems D to form bunches. After fixing, the plastic leaves E are trimmed; then the stems D are fixed on the trunk B. Manufacturing of such branches C not only is bothersome and time consuming, but also is resource wasting by the fact that the debris resulted from trimming after fixing of the plastic leaves E are not useful. 
     2. Fixing of the stems D on the trunk B by twisting of the stems D is subjected to dropping of lot of plastic leaves E and is bad for environment neatness. And the plastic leaves E are subjected to deformation by pressing or collision during packaging and shipping. 
     3. When the LED lamp sets F and the decorations G are hung on a Christmas tree and are adjusted for positioning, the stems D are supposed to be bent. However, amount of the LED lamp sets F and the decorations G and their locations of fixing are large, bending of a plurality of stems D will adversely influence the aesthetic appearance of the whole Christmas tree. 
     4. When in adjustment of the LED lamp sets F and the decorations G hung on a Christmas tree, they shall be in the first place taken down from the branches C. Thereafter, they are fixed on different branches C. Not only such a mode of adjustment is bothersome, but also the plastic leaves E are subjected to dropping when the branches C are repeatedly bent and repeatedly recover. 
     5. Such a Christmas tree is extremely time and man work consuming in assembling due to the bothersome procedure of manufacturing thereof. Therefore, price of them is high. 
     SUMMARY OF THE INVENTION 
     In view of the disadvantages resided in the conventional Christmas trees, the inventor of the present invention provides a novel structure for Christmas trees to get rid of the defects of the conventional Christmas trees after study, tests and continuous improvement based upon his professional and practical experience of years in designing and manufacturing the same kind of products. 
     Particularly, the structure of each of the Christmas trees of the present invention is like this, a lot of leaves thereon are formed by circling of metallic spring like coils and are used for direct hanging of the LED lamp sets which are prevented from dropping. The decorations on the Christmas tree can also be securely hung on the leaves. And an object of hanging the decorations in positions without bending the leaves can be achieved. 
     The primary object of the present invention is to provide a novel structure for Christmas trees made of metal. It can not only enhance the strength of the structure, but also prevent the Christmas trees from deformation during packaging and shipping. The leaves of the Christmas trees are made from spring like coils providing only slight elasticity; hence various sizes of leaves formed can be prevented from deformation as well as damage. And by providing the spring like coils, the decorations can be conveniently adjusted in hanging and can be surely hung at desired locations. This can solve the defects resided in hanging of the conventional Christmas trees. Such a Christmas tree not only is structurally simple and tough, but also can largely simplify the process of production and reduce the cost of production, and thus provides a practical as well as economic structure of Christmas tree. 
     The present invention will be apparent after reading the detailed description of the preferred embodiments thereof in reference to the accompanying drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     In the drawings: 
     FIG. 1 is a perspective view showing the appearance of a conventional Christmas tree; 
     FIG. 2 is a schematic plane view of the conventional Christmas tree shown in FIG. 1; 
     FIG. 3 is a perspective view of the present invention; 
     FIG. 4 is a schematic elevational plane view showing use of the present invention; 
     FIG. 5 is a schematic view showing combination of a leaf with a decoration article of the present invention; 
     FIG. 6 shows another embodiment of a leaf of the present invention; 
     FIG. 7 shows a further embodiment of a leaf of the present invention; 
     FIG. 8 is a variation of FIG.  7 . 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to FIG. 3 being a perspective view of the present invention, which shows that a Christmas tree of the present invention is comprised mainly of a seat  11 , a trunk  12  and a lot of leaves  13 . Wherein, the trunk  12  is mounted at the center of the seat  11  and is provided with the leaves  13  from the top to a lower level thereon. The leaves  13  are made by circling of spring like coils formed along the length of an elongate member between the opposite ends of the member; the two opposite ends of each elongate member are welded to the trunk  12  at an appropriate location thereon. The leaves  13  each has a smaller area on the top and gradually enlarges downwardly to have a larger area at the lower level of the trunk  11 , so that the Christmas tree as a whole is in the shape of a cone. 
     The seat  11  and the trunk  12  are made of material having appropriate mass or weight for the purpose that the leaves  13  and decorations  14  obtain adequate supporting force (as shown in FIG.  4 ). The leaves  13  are made of metal to form spring like coils and are processed by paint spraying, varnish baking or electric plating to prevent from rusting, and to increase smoothness and brightness. Thereby, a structurally simple, good looking and tough Christmas tree is provided. 
     The decorations  14  are hung on the leaves  13  by means of lines  141  extended through holes  140  provided on the decorations  14  (as shown in FIG.  5 ). Or the leaves  13  can be extended directly into the holes  140  or central bores  142  of the decorations  14 . Then the two ends of the leaves  13  are fixed on the trunk  12 , so that the decorations  14  can move freely on the leaves  13  to adjust the positions thereof. In this way, aesthetic appearance of the Christmas tree can be better. 
     Moreover, the leaves  13  are made of metallic material, it can not only be processed by paint spraying, varnish baking or electric plating to prevent from rusting and to increase smoothness and brightness; but can also be enveloped with an insulating layer  15  (as shown in FIG.  6 ). Therefore, when LED lamp sets are hung thereon, they form an excellent insulation state on the leaves  13  for preventing electric conducting. The spring like coils of the leaves  13  can be extended therethrough with reinforcing members  16 . The reinforcing members  16  can increase the structural strength of the leaves  13  for hanging heavier decorations  14 , and can afford variation of the leaves  13  in width and orientation suiting viewing in different angular positions of a user. The reinforcing members  16  can be made to have various colors to increase aesthetic appearance of the Christmas tree. Therefore, a colorful Christmas tree with good visual effect can be obtained. 
     Accordingly, the Christmas tree of the present invention has the following advantages: 
     1. The Christmas tree is made of metallic material, of which the structural strength can be increased, convenience in packaging and shipping thereof can be attained. Thereby, deformation in packaging and shipping thereof can be prevented. 
     2. The leaves of the Christmas tree are in the form of spring like coils having only slight elasticity, hence various sizes of the leaves formed can be prevented from deformation as well as damage. And by providing the spring like coils, the decorations can be conveniently adjusted in hanging and can be surely hung at desired locations. This can solve the defects resided in hanging of the conventional Christmas trees. 
     3. Such a Christmas tree not only is structurally simple and tough, but also can largely simplify the process of production and reduce the cost of production, and thus provides a practical as well as economic structure of Christmas tree. 
     4. The leaves are processed by paint spraying, varnish baking or electric plating to prevent from rusting and to increase smoothness and brightness. 
     5. The spring like coils of the leaves can be extended therethrough with reinforcing members to increase the structural strength of the leaves for hanging heavier decorations, and can afford variation of the leaves in width and orientation. 
     6. The reinforcing members can be made to have various colors to increase aesthetic appearance of the Christmas tree. 
     7. The leaves each is enveloped with an insulating layer. Therefore, when LED lamp sets are hung thereon, an excellent insulation state is formed on the leaves for preventing electric conducting. 
     The drawings attached are only for illustrating a preferred embodiment of the present invention, and not for giving any limitation to the scope of the present invention. It will be apparent to those skilled in this art that various equivalent modifications or changes can be made to the elements of the present invention without departing from the spirit, scope and characteristic of this invention. Accordingly, all such modifications and changes also fall within the scope of the appended claims and are intended to form part of this invention.