Abstract:
A bracket for supporting electronic devices includes first and second supporting arms, the first connecting arm defining a first connecting portion and the second connecting arm defining a second connecting portion. The first connecting portion and the second connecting portion can pivot around each other. Either the first connecting portion or the second connecting portion can define a positioning protrusion which is in use hidden, and the other can define a plurality of positioning grooves which are also hidden in use. The positioning protrusion being received in different positioning grooves renders the angle between the first supporting arm and the second supporting arm adjustable.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to Chinese Patent Application No. 201610217874.1 filed on Apr. 11, 2016. 
     FIELD 
     The subject matter herein generally relates to supporting brackets. 
     BACKGROUND 
     Electronic devices, such as flat computers and mobile phones, need to be supported on a platform so a user can watch a film without holding the electronic device in the hands. Therefore, brackets for supporting the electronic devices are needed. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Implementations of the present technology will now be described, by way of example only, with reference to the attached figures. 
         FIG. 1  is an isometric view illustrating an embodiment of a bracket supporting an electronic device. 
         FIG. 2  is an isometric view illustrating an embodiment of the bracket of  FIG. 1 . 
         FIG. 3  is an isometric view illustrating another embodiment of a bracket. 
         FIG. 4  is an exploded view of the bracket of  FIG. 2 . 
         FIG. 5  is a cross sectional view illustrating an embodiment of the bracket of  FIG. 2 . 
     
    
    
     DETAILED DESCRIPTION 
     It will be appreciated that for simplicity and clarity of illustration, where appropriate, reference numerals have been repeated among the different figures to indicate corresponding or analogous elements. In addition, numerous specific details are set forth in order to provide a thorough understanding of the embodiments described herein. However, it will be understood by those of ordinary skill in the art that the embodiments described herein can be practiced without these specific details. In other instances, methods, procedures, and components have not been described in detail so as not to obscure the related relevant feature being described. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features. The description is not to be considered as limiting the scope of the embodiments described herein. 
     The term “comprising” means “including, but not necessarily limited to”, it specifically indicates open-ended inclusion or membership in a so-described combination, group, series and the like. 
       FIG. 1  illustrates a first embodiment of a supporting bracket  100  configured for supporting an electronic device  200 . In the embodiment, the electronic device  200  can be a flat computer, a mobile phone, a digital photo frame, and other electronic devices  200  need to be supported. In this embodiment, the supporting bracket  100  is made of rigid materials. 
     Referring to  FIG. 2  and  FIG. 4 , in the first embodiment, the supporting bracket  100  includes a first supporting arm  10 , a second supporting arm  20 , and a connecting element  30 . The first supporting arm  10  is pivotally connected to the second supporting arm  20  via the connecting element  30 . 
     The first supporting arm  10  includes a carrying portion  11 , a first supporting portion  12 , and a first connecting portion  13 . 
     In the first embodiment, the carrying portion  11  is a platform which is strip shaped, and on which the electronic device  200  can be placed. In other embodiments, the carrying portion  11  can further define a groove or other latching elements to form an attachment with the electronic device  200 . In the first embodiment, the first supporting portion  12  includes two sub arms  121  which are both perpendicularly connected to ends of the carrying portion  11 . The two sub arms  121  are located in a same plane, and an acute angle or a right angle is formed between the carrying portion  11  and the plane of the supporting portion  12 , thus when the electronic device  200  is placed on the carrying portion  11 , the back of the electronic device  200  leans against the first supporting portion  12 . In the first embodiment, the number of the first connecting portions  13  is two and the two first connecting portions  13  are connected to free ends of the sub arms  121  of the first supporting portion  12 . Each first connecting portion  13  defines a through hole  131 . A sidewall of each first connecting portion  13  defines at least one positioning protrusion  132 . 
     In a second embodiment, as shown in  FIG. 3 , the first supporting portion  12  is a plate, the carrying portion  11  projects from the first supporting portion  12  along a bottom side of the first supporting portion  12 . The first connecting portion  13  is connected to an end of the supporting portion  12  which is away from the carrying portion  11 . 
     In the first and the second embodiments, the second supporting arm  20  includes a resisting portion  21 , a second supporting portion  22 , and a second connecting portion  23 . 
     The resisting portion  21  is strip shaped and is configured to rest on a platform, for example a desk top. The second supporting portion  22  includes two rods  221  which are connected to ends of the resisting portion  21 . In the first and second embodiments, the number of the second connecting portions  23  is two and the two second connecting portions  23  are connected to the distal ends (away from the resisting portion  21 ) of the two rods  221  of the second supporting portion  22 . 
     In the first and second embodiments, each of the two second connecting portions  23  is U-shaped. Each branch of the second connecting portion  23  defines a connecting hole  231 . The connecting holes  231  correspond to the through holes  131  defined in the first connecting portion  13 . When the two first connecting portions  13  are received in the two second connecting portions  23 , the connecting holes  231  are aligned with the through holes  131 . 
     In the first and second embodiments, the second connecting portion  23  further defines a number of positioning grooves  232  corresponding to the at least one positioning protrusion  132 , as shown in  FIG. 4 . The positioning grooves  232  are arranged around the connecting holes  231 . The positioning protrusion  132  is engagable into different positioning grooves  232 , thus an angle between the first supporting arm  10  and the second supporting arm  20  can be adjustable. 
     In the first and second embodiments, at least one of the positioning protrusions  132  and the positioning grooves  232  are made of elastic material, such as rubber or flexible plastic. 
     In other embodiment, the positioning protrusion  132  can be defined on the second connecting portion  23  and the positioning grooves  232  can be defined in the first connecting portion  13 . 
     Referring to  FIG. 4  and  FIG. 5 , in the first embodiment, the connecting element  30  includes a connecting shaft  31  and two shaft pins  32 . The connecting shaft  31  is cannular, a first latching portion  311  protrudes from an inner sidewall of two ends of the connecting shaft  31 . Each shaft pin  32  is rod-shaped, a stepped stopping portion  321  is defined on an outer sidewall of each shaft pin  32 . Each shaft pin  32  further defines a second latching portion  322  at its distal end, the second latching portion  322  is configured to engage with the first latching portion  311 . 
     In other embodiments, the connecting element  30  can be other well-known structural components. 
     In the first and second embodiments, when assembling the bracket  100 , the through holes  131  are first aligned with the connecting holes  231 , and the positioning protrusion  132  is engaged in one of the positioning grooves  232 . Then, the connecting shaft  31  is placed between the two rods of the second supporting portion  22 , and the two shaft pins  32  are inserted into the connecting hole  231  and the through hole  131 , until the stepped stopping portions  321  of the two shaft pins  32  meet the ends of the connecting shaft  31 , and each of the second latching portions  322  latches to the first latching portion  311 . Thus, the first supporting arm  10  is rotatably connected to the second supporting arm  20 . 
     In use, when a user rotates the first supporting arm  10  towards or away from the second supporting arm  20 , the first supporting arm  10  and the second supporting arm  20  rotate relative to the connecting element  30 , and the positioning protrusion  132  can be received in different positioning grooves  232 , thus the angle of the bracket  100  can be adjusted. 
     It is believed that the present embodiments and their advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the spirit and scope of the disclosure or sacrificing all of its material advantages, the examples hereinbefore described merely being exemplary embodiments of the present disclosure.