Abstract:
A battery cover assembly for a portable electronic device is disclosed including a base member, a cover member rotatably attached with the base member, a connecting body, a protruding post, a sleeve, and an elastic member. The connecting body guides the rotation of the cover member about the axis of the protruding post. A sleeve rotates along with the cover member and can maintain the cover member at any position relative to the base member during rotation of the cover member. The elastic member can disengage the sleeve from the base member.

Description:
BACKGROUND 
     1. Technical Field 
     The disclosure relates to battery cover assembly used in portable electronic device. 
     2. Description of Related Art 
     Portable electronic devices usually use battery covers for frequent installation and removal of batteries relative to the housings. A typical battery cover is used to attach a battery cover to a housing of the portable electronic device, with a pair of hooks at one end of the battery cover and a locking pin at the other end of the battery cover. A pair of grooves and a locking hole are defined in the housing. In assembly, the hooks are inserted into the grooves. The battery cover is pressed downward onto the housing until the locking pin is inserted into the locking hole. However, during removal of the battery, the battery cover needs to detach separately from the housing, which through user carelessness, may cause an unwanted lose of the battery cover. 
     Therefore, there is room for improvement within the art. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Many aspects of the present battery cover assembly for portable electronic device can be better understood with reference to the following drawings. The components in the various drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating the principles of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the diagrams. 
         FIG. 1  is an isometric exploded view of a battery cover assembly for a portable electronic device according to an exemplary embodiment of the disclosure. 
         FIG. 2  is an enlarged isometric view of a sleeve of the battery cover assembly shown in  FIG. 1 . 
         FIG. 3  is an assembled, sectional view of the battery cover assembly shown in  FIG. 1  in a closed position. 
         FIG. 4  is another view of the assembled battery cover assembly shown in  FIG. 3  in an opened position. 
     
    
    
     DETAILED DESCRIPTION 
       FIGS. 1 through 4  show an exemplary battery cover assembly  100  for a portable electronic device such as mobile phone. The battery cover assembly  100  includes a cover member  10 , a base member  20 , a sleeve  30 , an elastic member  40 , a washer  50  and a bolt cap  60 . 
     The cover member  10  can be a cover for the portable electronic device. The cover member  10  defines a through mounting hole  12  near a corner. The cover member  10  has an arcuate guiding rail  14  formed around the mounting hole  12 . The guiding rail  14  protrudes from a bottom surface  142  of the cover member  10  and extends from the middle of the rim of the bottom surface  142  to the corner of the bottom surface  142 . 
     The base member  20  can be a housing for the portable electronic device and includes a base body  22  and a connecting body  24 . The base body  22  includes a connecting end  221  and a receiving end  222 . The receiving end  222  is used to receive a battery for the portable electronic device. The connecting end  221  corresponds to the connecting body  24  for accommodating and securing the connecting body  24 . The connecting end  221  defines a mating hole  223  at the corner. The mating hole  223  has substantially the same shape and size as the mounting hole  12 . The connecting end  221  has a protruding post  224  partially received in and positioned at the center of the mating hole  223 . The protruding post  224  extends out from the mating hole  223  to the top of the base body  22 . The protruding post  224  defines an annular groove  2242  at the end. The washer  50  engages into the annular groove  2242 . The connecting end  221  has a plurality of evenly spaced limiting portions  2232  projecting downwardly from the circumferential wall  2231  of the mating hole  223 . In this embodiment, the connecting end  221  has three limiting portions  2232 . 
     The connecting body  24  defines a connecting hole  242  near a corner and an arcuate guiding groove  244  around the connecting hole  242 . The connecting hole  242  has substantially the same shape and size as the mounting hole  12  and the mating hole  223 . The guiding groove  244  is recessed from an upper surface  244  of the connecting body  24  and extends from a corner to a diagonal corner of the upper surface  244 . The guiding rail  14  slidably engages into the guiding groove  244 . 
       FIG. 2  shows the sleeve  30  for engaging the mating hole  223 . The sleeve  30  includes an open end  32  and a partially-closed end  34 . The sleeve  30  has a screw thread  322  in the inside wall of the sleeve  30  and adjacent to the open end  32  (seen in  FIG. 1 ). The bolt cap  60  can screw with the screw thread  322  from the open end  32  into the sleeve  30 . The partially-closed end  34  has a partially-closed end wall  342  and defines a mating aperture  344  through the center of the partially-closed end wall  342 . The mating aperture  344  can engagingly receive the protruding post  224 , accordingly, the sleeve  30  is placed around and supported by the protruding post  224 . The partially-closed end  34  has a plurality of latching portions  346  extended from the peripheral flange of the partially-closed end wall  342  for latching the circumferential wall  2231  of the mating hole  223 . In this embodiment, the partially-closed end  34  includes three latching portions  346 . 
     Referring back to  FIG. 1 , the elastic member  40  can be a coiled spring surrounding the protruding post  224 . The washer  50  is an annular ring and provided with sufficient elasticity to engage the protruding post  224  and to slide and latch into the annular groove  2242 . The bolt cap  60  includes a cap end  62  and a bolt end  64 . The cap end  62  has a larger diameter than the mounting hole  12 . The bolt end  64  can screw with the screw thread  322 . 
     After assembly of the battery cover assembly  100  (shown in  FIG. 3 , in a closed position), the cover member  10  covers and engages the base member  20 , and the connecting body  24  is stationarily secured in the base member  20 . The connecting hole  242 , the mounting hole  12  and the mating hole  223  align with each other, and cooperatively accommodate and secure the sleeve  30  therein. The sleeve  30  has the open end  32  facing upward and received in the cover member  10  and the partially-closed end  34  facing downward, and received in the base member  20 . The washer  50  secures to the protruding post  224  by engaging into the annular groove  2242 . The elastic member  40  is received in the sleeve  30  around the protruding post  224  and compressed between the washer  50  and the partially-closed end wall  342 . 
     All portions of the guiding rail  14  engage into the guiding groove  244 . The bolt cap  60  screws the sleeve  30  with the cap end  62  resisting against the circumferential flange of the mounting hole  12 . The bolt cap  60  secures the cover member  10  with the sleeve  30  and further with the base member  20 . Each latching portion  346  latch the circumferential wall  2231  of the mating hole  223  between the two adjacent limiting portions  2232 . The securing of the bolt cap  60  and latching of the latching portions  346  enable the cover member  10  not to detach from the base member  20  upwardly. Accordingly, the cover member  10  and the base member  20  are integrally connected without separate or detach during process of the battery cover assembly  100  between the closed position and the open position. 
     The battery cover assembly  100  can be opened for installation or removal of the battery relative to the receiving end  222 . To open the battery cover assembly  100 , the bolt cap  60  is downwardly pressed to further compress the elastic member  40 . Due to screwing of the bolt cap  60  and the sleeve  30 , the sleeve  30  moves downwardly accompanying the pressing of the bolt cap  60 , accordingly, releasing the latching of the latching portions  346  and the circumferential wall  2231 . In this case, the cover member  10  can rotate relative to the base member  20  by an external force about the axis of the protruding post  224 . During this course, the guiding rail  14  slides within the guiding groove  244 , exposing portions thereof, and the receiving end  222 . The latching portions  346  rotate within the mating hole  223  until resisting against the limiting portions  2232 . Accordingly, the limiting portions  2232  limit the rotation of the latching portions  346  and the cover member  10  relative to the base member  20 . At this time, the battery cover assembly  100  can be maintained in an open position after removal of the pressing force. It is to be understood in addition to this open position, the cover member  10  can stay at any position between the closed position and open position by the latching force between the latching portions  346  and the circumferential wall  2231 . 
     It is to be understood that the washer  50  can be omitted, accordingly, the elastic member  40  can be directly compressed between the partially-closed end wall  342  and the bottom surface of the bolt end  64 . 
     It is to be understood that even though numerous characteristics and advantages of the present embodiments have been set forth in the foregoing description, together with details of structures and functions of various 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 disclosure to the full extent indicated by the broad general meaning of the terms in which the appended claims are expressed.