Abstract:
A CPU connector includes at least one terminal and the terminal includes a first spring section moved along a bevel of a latitude rib of a protection board in order to preload the terminal in a through hole of the protection board. The first spring section pushes upward the bevel of the protection board such that the terminal has uniform action of CPU contact face. The terminal includes arc section to scratch dirt on CPU contact face. When the terminal is soldered to contact of the motherboard, the terminal release pressure to push downward the tin ball. The terminal can be soldered to motherboard without needing high evenness. The terminal board can be directly clamped into a frame and a handle on a cover can be rotated to clamp the terminal board.

Description:
BACKGROUND OF THE INVENTION  
       [0001]     1. Field of the Invention  
         [0002]     The present invention relates to a central processor unit (CPU) connector, especially to a CPU connector having terminal with arc section, and the improvement over protection board, and frame.  
         [0003]     2. Description of Related Art  
         [0004]     The conventional CPU connector generally comprises a terminal plate with terminals on one side thereof and the terminal has solder ball at distal end thereof. The solder ball can be fixed to the distal end of the terminal by reflow process. Afterward the terminal plate is placed in a metal frame and fixed to the metal frame by ultra sonic fusion. The terminal plate is then soldered to a motherboard and then a CPU is assembled atop the terminal plate. An operation arm is used to press the CPU for connecting the CPU with the motherboard. However, the contact end of the terminal is exposed out of the terminal plate and is liable to deform, thus resulting poor contact or open circuit.  
       SUMMARY OF THE INVENTION  
       [0005]     According to one aspect of the present invention, the present invention provides a CPU connector including at least one terminal and the terminal including a first spring section moved along a bevel of a latitude rib of a protection board in order to preload the terminal in a through hole of the protection board. The first spring section pushes upward the bevel of the protection board such that the terminal has uniform action of CPU contact face. The terminal includes arc section to scratch dirt on CPU contact face.  
         [0006]     According to another aspect of the present invention, the present invention provides a CPU connector wherein the contact on the motherboard is applied with tin paste and the connector passes reflow oven. The tin ball will molten by heat and pushed downward by released pressure of terminal. The terminal can be soldered to motherboard without needing high evenness.  
         [0007]     According to still another aspect of the present invention, the terminal board can be locked into the frame without needing ultrasonic fusion,  
         [0008]     According to still another aspect of the present invention, the handle of the cover in the frame of the CPU connector can be correctly clamped. 
     
    
     BRIEF DESCRIPTION OF DRAWING  
       [0009]     The features of the invention believed to be novel are set forth with particularity in the appended claims. The invention itself however may be best understood by reference to the following detailed description of the invention, which describes certain exemplary embodiments of the invention, taken in conjunction with the accompanying drawings in which:  
         [0010]      FIGS. 1A and 1B  show the terminal of the CPU connector according to a preferred embodiment of the present invention.  
         [0011]      FIG. 1C  shows a sectional view of the terminal clamping solder ball in the CPU connector of the present invention.  
         [0012]      FIG. 2  shows the terminal clamping solder ball in the CPU connector of the first preferred embodiment of the present invention.  
         [0013]      FIG. 3  shows the terminal clamping solder ball in the CPU connector of the second preferred embodiment of the present invention.  
         [0014]      FIG. 4  shows the terminal clamping solder ball in the CPU connector of the third preferred embodiment of the present invention.  
         [0015]      FIG. 5  shows an exploded view of the terminal board and frame in the CPU connector of the present invention.  
         [0016]      FIG. 6  shows a perspective view of the terminal board and frame in the CPU connector of the present invention.  
         [0017]      FIG. 7  shows a perspective view of the frame of the CPU connector according to the present invention. 
     
    
     DETAILED DESCRIPTION OF THE INVENTION  
       [0018]      FIGS. 1A and 1B  show the terminal of the CPU connector according to a preferred embodiment of the present invention. The CPU connector according to the preferred embodiment of the present invention mainly comprises a protection board  10 , a frame  20  and a terminal board  60  as shown in  FIG. 5 . The protection board  10  can be assemble into the terminal board  60  and used to protect a first spring portion  32  of exposed terminal  30 . The terminal board  60  assembled with the protection board  10  is assembled into the frame  20 . The protection board  10  is a rectangular plate and comprises a plurality of longitudinal ribs  11  and a plurality of latitude ribs  12  such that a through hole  13  is defined between the longitudinal ribs  11  and the latitude ribs  12 . The terminal board  60  comprises a plurality of terminal holes  61  and each of the terminal holes  61  contains a terminal  30  therein.  
         [0019]     The longitudinal ribs  11  are vertical to the latitude ribs  12  and the latitude rib  12  comprises a first face  121 , a second face  122  and a bevel  123  with the first face  121  parallel to the longitudinal ribs  11 . The terminal  30  comprises an attaching section  31 , a first spring section  32 , and a second spring section  33 . The attaching section  31  comprises a first spring section  32  and a second spring section  33  on both ends thereof. The first spring section  32  comprises an arc section  34  at free end thereof and the arc section  34  comprises a curve part  341 . Therefore, the dirt on the contact face of the CPU can be scratched when the terminal  30  is moved across the CPU. When the CPU is pressed down in opening state, the bevel  123  can push the first spring section  32  to generate a preload pressure for the first spring section  32  in contact with the CPU. Therefore, the first spring section  32  has larger friction force to remove dirt on surface of CPU. The first spring section  32  is guided by the bevel  123  to reach a predetermined position of the CPU. When the CPU is in opening state, the first spring section  32  acts on the bevel  123  such that the first spring section  32  pushes the bevel  123  of the rib  12  upward and the terminal  30  is received into the protection board  10 . The spring section  32  further comprises S shaped arced section  321  connected with the attaching section  31  to increase spring swing thereof. When the terminal  10  pushes the bevel  123  of the rib  12 , the terminal  30  is moved along contact face of the CPU to scratch dirt therefrom. The first spring section  32  comprises a slanting line segment  333  to push the bevel  123  of the rib  12 .  
         [0020]      FIG. 1C  shows a sectional view of the terminal clamping solder ball in the CPU connector of the present invention. The second spring section  33  comprises a continuous curve section  332  connected to the attaching section  31  and the second spring section  33  comprises a protecting section  331  at free end thereof to hold a solder ball  40  together with the bottom structure of the terminal board  60 . The solder ball  40  enters the protecting section  331  of the terminal  30  from the position A. At this time, the second spring section  33  does not provide pushing force for the solder ball  40  and the front end of the protecting section  331  of the terminal  30  can guide the solder ball  40  to enter the protecting section  331 . When the solder ball  40  is moved to the position B, the protecting section  331  of the terminal  30  is moved apparently. When the solder ball  40  is moved to the position C, the protecting section  331  and the bottom structure of the terminal board  60  together hold a solder ball  40 . The protecting section  331  provides a pressure to the solder ball  40  when the solder ball  40  is moved from position A to position B and then to position C. During usage, the contact of the motherboard is applied with tin paste and the connector is placed at corresponding place and passes a reflow oven. The solder ball  40  is molten due to heat and the terminal  40  releases pressure to push downward the solder ball  40 . Therefore, the unevenness of the motherboard can be compensated and the soldering yield can be enhanced.  
         [0021]      FIGS. 2, 3 , and  4  shows the terminal clamping solder ball in the CPU connector of the first, the second and the third preferred embodiment of the present invention. The terminal board  60  comprises a plurality of first ribs  14  and a plurality of second ribs  15  on bottom thereof. Preferably the second rib  15  is placed atop the first ribs  14 . A plurality of passageways  50  is defined between the second rib  15  and a terminal hole  61  is defined between the first rib  14  and the second rib  15  and containing a terminal  30  therein. The second rib  15  comprises a clamping face  151  facing the passageway  50  and the protecting section  331  of the terminal  30  clamps the tin ball  40  together with the clamping face  151 , thus fixing the tin ball  40 . As shown in  FIG. 2 , the clamping face  151  can be arc face such that the clamping points on both ends of the second rib  15  and the protecting section  331  of the terminal  30  provide three clamping points for clamping the tin ball  40 . As shown in  FIG. 3  the clamping face  151  can be bevel face. As shown in  FIG. 3  the clamping face  151  can be stair face.  
         [0022]      FIGS. 5 and 6  shows the terminal board and frame in the CPU connector of the present invention. The CPU connector of the present invention comprises a frame  20  and a terminal board  60 . The terminal board  60  comprises a first end face  16  and a second end face  17 . The first end  16  comprises a plurality of first lockers  161  and the second end face  17  comprises a plurality of second lockers  171 . The frame  20  comprises a rack  21  and a cover  22  pivotally connected by a crank  23  to have relative rotation therebetween. The rack  21  comprises a stair  211  with a first edge  212  and a second edge  213 . The first edge  212  comprises a plurality of third lockers  25  and the second edge  213  comprises a plurality of fourth lockers  26  corresponding to the third lockers  25 . Therefore, the first lockers  161  are engaged with the third lockers  25  and the second lockers  171  are engaged with the fourth lockers  26 .  
         [0023]     As shown in  FIG. 5 , the first locker  161  is a first dent  162  and a spring tenon  163  vertically provided at top of the first dent  162 . The second locker  171  is a second dent  172  and a spring tenon  173  is vertically provided at top of the second dent  172 . Therefore, the first locker  161  and the second locker  171  have the same structure. The third locker  25  is a first recess  251  and a first bump  252  is provided in the first recess  251 . The fourth locker  26  is a second recess  261  and a second bump  262  is provided in the second recess  261 . Therefore, the spring tenon  163  of the first dent  162  can be engaged with the first bump  252 ; while the spring tenon  173  of the second dent  172  can be engaged with the second bump  262 .  
         [0024]      FIG. 6  shows the locker according to another preferred embodiment of the present invention. The first locker  164  is a first dent  165  and the second locker is a second dent  175 . A spring tenon  176  is extended downward vertically from top of the second dent  175 . The third locker  25  is a first recess  251  and a first bump  252  is provided in the first recess  251 , the fourth locker  26  is a second recess  261  and a second bump  262  is provided in the second recess  261 . Therefore, the first dent  165  can be engaged with the first bump  252  and the spring tenon  176  can be engaged with the second bump  262 . The terminal board  60  comprises a third end face  18  and a fourth end face  19 . At least one recess  181  is inwardly defined below the first end face  16 , the second end face  17 , the third end face  18  and the fourth end face  19  such that the recess  181  of the terminal board  60  can be fixed to the stair  211  of the rack  21 . Therefore, the terminal board  60  can be retained within the frame without using ultrasonic wave fusion.  
         [0025]      FIG. 7  shows a perspective view of the frame  20  of the CPU connector according to the present invention. The frame  20  in the CPU connector according to the present invention comprises a rack  21  and a cover  22  pivotally connected through a crank  23  to have relative rotation therebetween. The crank  23  comprises a handle  24  at one end thereof and the operation of the handle  24  can rotate the cove  22 . The rack  21  comprises an end plate  214  at one end thereof and a first device  215  and a second device  216  are arranged at the end plate  214 . The first device  215  and the second device  216  are wrapped to form an axial hole  217  into which the crank  23  is contained and rotatable.  
         [0026]     A positioning section  218  is provided between the first device  215  and the second device  216 . A third device  223  is arranged at the end plate  221  of the cover  22  and wrapped to form an axial ring  224 , which can be capped to the crank  23 . A post  225  is formed outward at the third device  223 . When the handle  24  is moved to predetermined position, the handle  24  moves the crank  23  to rotate to abut against the positioning section  218 . The crank  23  links the cover  22  such that the post  225  is clamped to the recess  219  on the positioning section  218 . The end plate  221  of the cover  22  comprises a positioning post  222  beside the third device  223 . The positioning post  222  is clamped on the neck of the crank  23 . Therefore, the cover  22  and handle  24  of the frame  20  can be clamped simultaneously.  
         [0027]     To sum up, the resilience of the first spring section of the terminal provides upward pushing face and preload pressure for the bevel of the protection board. The terminal can scratch dirt from CPU contact face and the unevenness of the motherboard can be compensated by the tin ball to enhance soldering yield. The terminal board can be directly fixed in the frame and ultrasonic fusion is not needed.  
         [0028]     Although the present invention has been described with reference to the preferred embodiment thereof, it will be understood that the invention is not limited to the details thereof. Various substitutions and modifications have suggested in the foregoing description, and other will occur to those of ordinary skill in the art. Therefore, all such substitutions and modifications are intended to be embraced within the scope of the invention as defined in the appended claims.