Abstract:
A circuit board assembly comprises a first circuit board and a second circuit board. A connector socket is mounted on the first circuit board, and a connector plug is mounted on the second circuit board. A handle assembly is attached to either the first circuit board or the second circuit board. The handle assembly comprises a base member attached to either the first circuit board or the second circuit board and first and second rotating members pivotably attached to opposite ends of the base member. When the first rotating member and the second rotating member are rotated away from the base member, the connector plug is disengaged from the connector socket. When the first rotating member and the second rotating member are rotated towards the base member, the connector plug is inserted into the connector socket.

Description:
BACKGROUND 
     1. Technical Field 
     The present disclosure relates to circuit board assemblies, and more particularly to a circuit board assembly with a handle assembly. 
     2. Description of Related Art 
     A circuit board assembly comprises a first circuit board and a second circuit board attached to the first circuit board. The first circuit board comprises a connector socket, while the second circuit board comprises a connector plug inserted into the connector socket. The problem with this setup is that an operator may have to exert a great effort to connect or disconnect the connector plug to or from the connector socket. 
     Therefore, there is room for improvement within the art. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Many aspects of the embodiments can be better understood with references 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 embodiments. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views. 
         FIG. 1  is an exploded, isometric view of a circuit board assembly according to an embodiment. 
         FIG. 2  is similar to  FIG. 1 , but viewed from another aspect. 
         FIG. 3  is an exploded, enlarged view of a handle assembly of the circuit board assembly of  FIG. 1 . 
         FIG. 4  is similar to  FIG. 3 , but viewed from another aspect. 
         FIG. 5  is an assembled view of the handle assembly of  FIG. 3  in an unlocked state. 
         FIG. 6  is an assembled view of the circuit board assembly of  FIG. 1 , showing the handle assembly in an unlocked state. 
         FIG. 7  is an assembled view of the circuit board assembly of  FIG. 1 , showing the handle assembly in a locked state. 
     
    
    
     DETAILED DESCRIPTION 
     The disclosure is illustrated by way of example and not by way of limitation. In the figures of the accompanying drawings in which like references indicate similar elements. It should be noted that references to “an” or “one” embodiment in this disclosure are not necessarily to the same embodiment, and such references mean “at least one.” 
       FIGS. 1 and 2  show an embodiment of a circuit board assembly comprising a first circuit board  10 , a second circuit board  20 , and a handle assembly  30  attached to the second circuit board  20 . 
     The first circuit board  10  comprises two pairs of connector sockets  12 , a pair of first supporting brackets  14 , and a pair of second supporting brackets  16 . Each of the two pairs of connector sockets  12  is located adjacent to a pair of first supporting brackets  14 . Each of the pair of first supporting brackets  14  comprises a main piece  143  and a pair of first supporting flanges  141 , extending substantially perpendicularly from opposite sides of the main piece  143 . The main piece  143  and the pair of first supporting flanges  141  are substantially perpendicular to the first circuit board  10 . Each of the pair of second supporting brackets  16  comprises a main plate  163  and a pair of second supporting flanges  161 , extending substantially perpendicularly from the main plate  163 . A distance between the pair of first supporting brackets  14  is substantially equal to a width of the second circuit board  20 , and a distance between the pair of second supporting brackets  16  is substantially equal to a length of the second circuit board  20 . The second circuit board  20  comprises two pairs of connecter plugs  22  mating with the two pairs of connector sockets  12 . 
       FIGS. 3 and 4  show the handle assembly  30  comprising a base member  40 , a resilient member  50 , a latch member  60 , a mounting shaft  70 , a first rotating member  80 , and a second rotating member  90 . 
     The base member  40  comprises a base plate  42  and a pair of sidewalls  44 , extending substantially perpendicularly from opposite side edges of the base plate  42 . A pair of first mounting holes  423  is defined in a central portion of the base plate  42 . A pair of mounting posts  421  protrudes from the base plate  42  and is located adjacent to the pair of first mounting holes  423 . Two pairs of pivot mounting members  441  are attached to opposite ends of the pair of sidewalls  44  for pivotably mounting the first rotating member  80  and the second rotating member  90 . 
     The resilient member  50  is integrally formed and comprises a flat part  52 , a first slanting part  54 , and a second slanting part  56 . The first slanting part  54  extends from a first end of the flat part  52  in a first slanting direction relative to the flat part  52 . The second slanting part  56  extends from a second end of the flat part  52  in a second slanting direction relative to the flat part  52 . A length of the second slanting part  56  is greater than that of the first slanting part  54 . A first angle, between the first slanting part  54  and the flat part  52 , and a second angle, between the second slanting part  56  and the flat part  52 , are greater than 90 degrees, but less than 180 degrees. The first angle is less than the second angle. The distal ends of the first slanting part  54  and the second slanting part  56  form an edge curl. A pair of second mounting holes  521  is defined in the flat part  52  corresponding to the pair of mounting posts  421 . 
     The latch member  60  comprises a horizontal plate  62  and a vertical plate  64  perpendicularly connected to the horizontal plate  62 . An opening  66  is defined in a conjunction portion of the horizontal plate  62  and the vertical plate  64 . A pair of resilient hooks  621  extends out from the horizontal plate  62  corresponding to the pair of first mounting holes  423 . A resilient button  641  extends from an upper end of the vertical plate  64 . The resilient button  641  has a thin end and a thick end protruding from opposite sides of the vertical plate  64 . 
     The first rotating member  80  comprises a first main plate  82  and a pair of first side plates  84  extending substantially perpendicularly from opposite side edges of the first main plate  82 . A first pivot mounting hole  843  and a sliding slot  841  are defined in each of the pair of first side plates  84 . The first pivot mounting holes  843  are located adjacent to a rear end of each of the pair of first side plates  84 , while the sliding slots  841  are located adjacent to a front end of each of the pair of first side plates  84 . 
     The second rotating member  90  comprises a second main plate  92  and a pair of second side plates  94 , extending substantially perpendicularly from opposite side edges of the second main plate  92 . A second pivot mounting hole  941  is defined in each of the pair of second side plates  94 . An operating opening  921  is defined in the second main plate  92  for facilitating grasping of the second rotating member  90 . The operating opening  921  is located adjacent to a rear end of the second main plate  92 . The second main plate  92  further comprises a sunken portion  923  located at a front edge of the operating opening  921  corresponding to the resilient button  641 . A circular hole  943  is defined in each of the pair of second side plates  94  near the sunken portion  923  for engaging with the mounting shaft  70 . A distance between the pair of sidewalls  44  is enough to receive the pair of second side plates  94 , and the distance between the pair of second side plates  94  is enough to receive the pair of first side plates  84 . A length of the second main plate  92  is less than a length of the base plate  42 , but greater than the length of the first main plate  82 . 
       FIGS. 5 to 7  show that in assembly, the pair of mounting posts  421  is received in the pair of second mounting holes  521 , to mount the resilient member  50  onto the base plate  42 . The second slanting part  56  extends through the opening  66 , and the horizontal plate  62  is placed on the flat part  52 . The pair of resilient hooks  621  is received in the pair of first mounting holes  423  to mount the latch member  60  onto the base member  40 . Each pair of pivot mounting members  441  is received in the first pivot mounting holes  843  and the second pivot mounting holes  941 , such that the first rotating member  80  and the second rotating member  90  are pivotably attached to opposite ends of the pair of sidewalls  44 . The mounting shaft  70  extends through the circular holes  943  and the sliding slots  841  to connect the first rotating member  80  to the second rotating member  90 . The first rotating member  80  is rotatable along a first rotation direction. The second rotating member  90  is rotatable along a second rotation direction opposite to the first rotation direction. When the first rotating member  80  and the second rotating member  90  are rotating, the mounting shaft  70  slides along the sliding slot  841 . The base plate  42  is secured in a predetermined position on the second circuit board  20 . The two pairs of connector plugs  22  and the handle assembly  30  are located on opposite sides of the second circuit board  20 . 
     In one embodiment, the handle assembly  30  can be secured on the first circuit board  10 . 
     The handle assembly  30  is switchable between an unlocked position (see  FIGS. 5 and 6 ) and a locked position (See  FIG. 7 ). In the unlocked position, the resilient member  50  is in an original state. A distal end of the first slanting part  54  abuts against the second rotating member  90 , while a distal end of the second slanting part  56  abuts against the first rotating member  80 . The mounting shaft  70  is located at a front end of the sliding slot  841 , and the first rotating member  80  and the second rotating member  90  are slanted relative to the base plate  42 . 
     To switch the handle assembly  30  from the unlocked position to the locked position, the second rotating member  90  is grasped by the operating opening  921  and pushed downward. The second rotating member  90  is rotated along the second rotation direction, causing the first rotating member  80  to rotate along the first rotation direction. The sunken portion  923  deforms the resilient button  641  until it moves across the thin end of the resilient button  641 . The resilient button  641  rebounds to its natural position. The sunken portion  923  is hooked by the thin end of the resilient button  641 . Therefore, the second rotating member  90  and the first rotating member  80  are secured in the locked position. 
     To connect the first circuit board  10  to the second circuit board  20 , the two pairs of connector plugs  22  are aligned with the two pairs of connector sockets  12 , and the second rotating member  90  and the first rotating member  80  are rotated into the locked position. The handle assembly  30  exerts force on the second circuit board  20  to insert the two pairs of connector plugs  22  into the two pairs of connector sockets  12 . Therefore, the second circuit board  20  is connected to the first circuit board  10 . 
     To disconnect the second circuit board  20  from the first circuit board  10 , the second rotating member  90  and the first rotating member  80  are pulled from the locked position into the unlocked position. The handle assembly  30  exerts a pulling force on the second circuit board  20 , such that the two pairs of connector plugs  22  are removed from the two pairs of connector sockets  12 . Therefore, the second circuit board  20  is detached from the first circuit board  10 . 
     While the present disclosure has been illustrated by the description of preferred embodiments thereof, and while the preferred embodiments have been described in considerable detail, it is not intended to restrict or in any way limit the scope of the appended claims to such details. Additional advantages and modifications within the spirit and scope of the present disclosure will readily appear to those skilled in the art. Therefore, the present disclosure is not limited to the specific details and illustrative examples shown and described.