Abstract:
A portable electronic device includes a connector case and defines a cavity communicating to the air. A guiding portion is formed in the cavity. The connector case includes at least one interface and an engaging portion. The engaging portion is slidably attached to the guiding portion. The at least one interface is exposed when the connector case slides out from the cavity.

Description:
BACKGROUND 
     1. Technical Field 
     The present disclosure relates to portable electronic devices, particularly, to a portable electronic device with USB interface. 
     2. Description of Related Art 
     With rapid development of information technology, portable electronic devices, such as cellular phones, personal digital assistant (PDA), etc., are becoming even more popular. The portable electronic device generally includes various interfaces, such as universal serial bus (USB) interface, microphone interface, etc., at sidewalls thereof, for, at least, transmitting information, facilitating charging the portable electronic device from a power supply and etc. Since the interfaces of the portable electronic devices are easily contaminated by, e.g., dust, covers are applied to protect the interfaces from dust. However, this may effect the appearance of the portable electronic device. 
     Therefore, there is room for improvement within the art. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Many aspects of the portable electronic device can be better understood with reference to the following drawings. The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the portable electronic device. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views, in which: 
         FIG. 1  is an assembled, schematic view of a portable electronic device in accordance with an exemplary embodiment, the portable electronic device including a connector case; 
         FIG. 2  is an exploded, schematic view of the portable electronic device shown in  FIG. 1 ; 
         FIG. 3  is a schematic view of the connector case shown in  FIG. 1 ; 
         FIG. 4  is similar to  FIG. 1 , but showing the connector case in a work state; and 
         FIG. 5  is similar to  FIG. 4 , but showing from another aspect. 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
       FIG. 1  shows an exemplary embodiment of a portable electronic device  100  such as a mobile phone. The portable electronic device  100  includes a first housing  10 , a connector case  20  and a second housing  30 . 
     Referring to  FIG. 2 , the first housing  10  defines a cavity  12  at an end portion thereof. The cavity  12  is cooperatively defined by a bottom board  120 , two sidewalls  121 , 123  and two end surfaces  122 , 124  connecting with the sidewalls  121 . A guiding portion  13  is formed near a corner of the cavity  12  on the bottom board  120 . The guiding portion  13  includes a first rail  131  and a second rail  132 . The first rail  131  and the second rail  132  are substantially parallel to each other and extends from an inner surface of the end surface  122 , with the first rail  131  adjacent to the sidewall  121 . Each rail  131 ,  132  respectively includes a strip  1310  and a tab  1311  vertically extending from a top portion of the strip  1310 , and the two tabs  1311  of the first rail  131  and the second rail  132  extend toward each other. Two substantially parallel bars  1322  are formed on the strip  1310  of the second rail  132 , substantially perpendicular to the strip  1310  and the tab  1311 . Each bar  1322  defines an arcuate slot  1323  at one end thereof for locking the connector case  20 . 
     Also referring to  FIG. 3 , the connector case  20  includes a first end surface  211 , a second end surface  212 , a first side surface  213 , a second side surface  214 , a top surface  215 , and a bottom surface  216 , wherein the top surface  215 . The first end surface  211 , the bottom surface  216  and the second end surface  212  surround the second side surface  214  in order. The first end surface  211  and the first side surface  213  respectively form a first step  2111  and a second step  2132 , for preventing the connector case  20  from wholly sliding into the cavity  12  of the first housing  10 . A microphone interface  24  is set in the first end surface  211 , adjacent to the bottom surface  216 . An engaging portion  22  is formed on the second side surface  214 , and includes two L-shaped latches  221  for engaging with the two rails  131 ,  132  of the first housing  10 . Each latch  221  includes an edge  2211  at a top portion thereof, and the two edges  2211  of the latches  221  extend in opposite directions. A hemispherical protrusion  222  is positioned beside the engaging portion  22 , for selectively engaging in the slots  1323  of the guiding portion  13  to stably hold the connector case  20 . A USB interface  23  is arranged in the second side surface  214 , adjacent to the top surface  215 , and a connector (not shown) is arranged in the bottom surface  216  so that a USB or a microphone inserted into the interfaces can electrically connect with a main circuitry of the portable electronic device  100 . 
     The second housing  30  includes a main plate  31 , a side flange  32  and an end flange  33  connecting together. A cutout  34  is defined at a joining portion of the main plate  31 , the side flange  32  and the end flange  33  for allowing the connector case  20  extend through. The main plate  31  and the end flange  33  respectively have a first cut edge  312  and a second cut edge  322 . The first cut edge  312  and the second cut edge  322  respectively match the first step  2132  and the second step  2111 , so as to prevent the connector case  20  from wholly moving inside the portable electronic device  100 . 
     In assembly of the portable electronic device  100 , the engaging portion  22  of the connector case  20  is engaged with the guiding portion  13  of the first housing  10 , so that the connector case  20  is slidable relative to the first housing  10 . The second housing  30  is attached to the first housing  10 , with the connector case  20  extending through the cutout  34 . The first step  2132  and the second step  2111  respectively face the first cut edge  312  and the second cut edge  322 . 
     In use, the connector case  20  is pushed out, and the latches  221  slide along the rails  131 ,  132  until the protrusion  222  is locked into one slot  1323  adjacent to the end surface  122 . The USB interface  23  and the microphone interface  24  are exposed. Thus, users can insert a USB or a connector of a microphone into the USB interface  23  or the microphone interface  24 . It should be understood that the latches  221  will resist the end surface  122  when the connector case  20  is further pushed out, which can stop the connector case  20  getting away from the portable electronic device  100 . 
     After use, the connector case  20  is pushed into the cavity  12  until the protrusion  222  is pushed to be locked into the other slot  1323  far away the end surface. It should be understood that the first step  2132  and the second step  2111  will be stopped by the cut edges  312 ,  322  when the connector case is given a further pushing force, which can stop the connector case  20  further moving inside the portable electronic device  100 . 
     It is to be further understood that even though numerous characteristics and advantages of the present embodiments have been set forth in the foregoing description, together with details of the structures and functions of the embodiments, the disclosure is illustrative only, and changes may be made in detail, especially in matters of shape, size, and arrangement of parts within the principles of the invention to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.