Abstract:
A cover configured to cover a base of an electronic device. The cover includes a plurality of sidewalls, a plurality of limiting portions and a plurality of bent portions. The limiting portions are arranged on the sidewalls and protruding inwardly to latch to the base. The bent portions are arranged on the sidewalls and extending outwardly to contact ground portions of the electronic device. An electronic device employing the cover is also provided.

Description:
FIELD 
     The subject matter herein generally relates to a cover providing grounding for an electronic device and an electronic device having the cover. 
     BACKGROUND 
     Electronic devices such as Wi-Fi Access Point (AP) device and 3G smallcell device, may easily affected by noise when receiving signals. Normally, adding a shielding assembly to the electronic device and changing a circuit arrangement to archive circuit matching decreases noise affection. However, the matching value of the elements of the circuit is limited and the added shielding elements increase design time and cost. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Many aspects of the disclosure can be better understood with reference to the following figures. The components in the figures are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. 
         FIG. 1  is an isometric view of one embodiment of a cover. 
         FIG. 2  is an isometric view of one embodiment of the cover shown in  FIG. 1  covering a base of an electronic device. 
     
    
    
     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. Also, the description is not to be considered as limiting the scope of the embodiments described herein. The drawings are not necessarily to scale and the proportions of certain parts may be exaggerated to better illustrate details and features of the present disclosure. 
     The term “comprising,” when utilized, means “including, but not necessarily limited to”; it specifically indicates open-ended inclusion or membership in the so-described combination, group, series and the like. 
       FIG. 1  illustrates one embodiment of a cover  100  applied in an electronic device. The electronic device can be a Wi-Fi Access Point (AP) device and a 3G small cell device. 
       FIGS. 1 and 2  illustrate that the cover  100  is substantially a rectangular frame having an opening. The cover  100  is made of metal material and made by integral molding technology. The cover  100  covers a base  200  of the electronic device and electrically connected to a ground of the electronic device to increase a grounding size, therefore decreasing noise affection. The cover  100  includes a bottom wall  10 , a first sidewall  20 , second sidewalls  30 , limiting portions  40  and bent portions  50 . 
     The bottom wall  10 , the first sidewall  20  and the second sidewall  30  are substantially sheet in shaped. The first sidewall  20  is substantially perpendicular to the bottom wall  10 . In at least one embodiment, a number of the second sidewall  30  is two, which are perpendicularly connected to opposite ends of the first sidewall  20 . The bottom wall  10  is spaced between the two second sidewalls  30 . In at least one embodiment, conjunctions between the bottom wall  10 , the first sidewall  20  and the second sidewalls  30  are fillet angles, thereby decreasing sharpness of the cover  100 . 
     The bottom wall  10  defines first connecting holes  12  and an expose hole  14 . The first connecting holes  12  are configured to receive fixing pieces to fix the cover  100  to the base  200 . The expose hole  14  is configured to expose a predetermined portion of the base  200 , such as a connector  210 . Two extend portions  31  are formed on ends of the second sidewalls  30  extending towards the opposite sides of the bottom wall  10 . Each extend portion  31  defines a second connecting hole  32  and configured to receive portions of the base  200 , such as protrusion columns  220 . In at least one embodiment, the first connecting holes  12  and the second connecting holes  32  are coplanar and configured to connect to a same plane of the base  200 . 
     The limiting portions  40  are arranged on the second sidewalls  30 . In at least one embodiment, a number of the limiting portions  40  are four and each second sidewall  30  includes two limiting portions  40 . Each limiting portion  40  is substantially sheet shaped and slightly protruded from the second sidewall  30  towards the bottom wall  10  and configured to hold the base  200 . 
     The bent portions  50  are arranged on the first sidewall  20  and the second sidewalls  30 . In at least one embodiment, a number of the bent portions  50  is four. Two bent portions  50  are arranged on opposite ends of the first sidewall  20 , the other two bent portions  50  are arranged on the two second sidewalls  30 , respectively. Each bent portion  50  on the second sidewalls  30  is located between the limiting portions  40 . Each bent portion  50  is substantially U-shaped and extends outwardly and configured to contact ground portions, such as ground elastic pieces, of the electronic device to increase a ground size of the electronic device. 
     The cover  100  covers the base  200  of the electronic device and latches to the base  200  via the limiting portions  40 . The bent portions  50  contact the ground portion of the electronic device to increase a ground size of the electronic device. In at least one embodiment, a frequency band of the signals transmitted by the electronic device is about 869-894 MHz, when the cover  100  is added to the electronic device, noise resonated by the electronic device at frequency of 875 MHz and 880 MHz is effectively decreased, and the communication quality could be increased. 
     It is believed that the 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 scope of the disclosure or sacrificing all of its advantages, the examples hereinbefore described merely being illustrative embodiments of the disclosure.