Abstract:
The instant disclosure relates to a memory module comprising a PCB and a detachable assembly. The PCB has a terminal portion and a free portion away from the terminal portion. The detachable assembly includes a plurality of metal members disposed on the free portion of the PCB. Thereby, user can averagely force the metal members to install or detach the memory module from a memory slot of a computer system to prevent the interference of outer ESD to affect the normal function of PCB.

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The instant disclosure relates to an auxiliary detachable assembly for electronic devices; in particular, to a detachable assembly and the memory module using the same which can prevent electrostatic interference. 
     2. Description of Related Art 
     As the volume of electronic devices continues to miniaturize, the processing speed and operational functions are gradually becoming faster and more powerful, respectively. As a result, mainboards and electronic components in electronic devices are not only required to be miniaturized, but are also required to provide even higher operational speed in order to meet users&#39; demand. As the data processing power increases, the demand for higher capacity and speed from memory modules of computers increases. 
     Dynamic random access memory (DRAM) is presented in the form of a module within a computer. In other words, DRAM module includes integrated circuits and printed circuit boards. Users usually first align the printed circuit board of the DRAM module against the memory slot, then apply a force on the top portions of the DRAM module such that the printed circuit board is inserted into the memory slot, thus, the computer system can operate normally. 
     However, static electricity tends to store in the hands of users and is transmitted to the DRAM module which can lead to abnormal operations thereof. In severe cases, electronic components may malfunction or even be damaged. Moreover, the surface area on top of the DRAM module in which users can apply force upon is relatively small. Specifically, the force applicable area is substantially the thickness of the printed circuit board. As a result, users are more likely to misalign the DRAM module with the memory slot, thus, affecting normal operations, or even worse, damaging the DRAM module. 
     To address the above issues, the inventor strives via associated experience and research to present the instant disclosure, which can effectively improve the limitation described above. 
     SUMMARY OF THE INVENTION 
     The object of the instant disclosure is to provide a detachable assembly to facilitate installation or detachment of electronic devices and prevent static electricity from transmitting to the electronic devices, which may affect normal operations, during installation or detachment. 
     In order to achieve the aforementioned objects according to an embodiment of the instant disclosure, a detachable assembly is provided to facilitate installing or detaching a memory module of a printed circuit board in a memory slot. The printed circuit board has a terminal portion and a free portion arranged away from the terminal portion. Notably, the detachable assembly includes a plurality of metal parts which are disposed on the free portion of the printed circuit board. 
     According to the aforementioned detachable assembly, the instant disclosure also provides a memory module which includes a printed circuit board and a detachable assembly. The printed circuit board has a terminal portion and a free portion arranged away from the terminal portion. The detachable assembly includes a plurality of metal parts which are disposed on the free portion of the printed circuit board. 
     In an embodiment of the instant disclosure, the metal parts are arranged with a predetermined distance to provide means for even force exertion thereon. 
     The printed circuit board has a first surface and an oppositely arranged second surface. The first surface and the second surface each has a first corner and a second corner arranged proximate to the terminal portion and has a third corner and a fourth corner arranged away from the terminal portion. The metal parts are respectively disposed on the third corner of the first surface, the fourth corner of the first surface, the third corner of the second surface, and the fourth corner of the second surface. 
     The terminal portion of the printed circuit board includes a plurality of ground terminals. The first surface and second surface of the printed circuit board have a plurality of metal traces disposed thereon. An end of the metal trace connects to copper foil and the other end connects to the ground terminal. 
     The metal parts may be a plurality of metal sleeves. The metal sleeves envelop the free portion of the printed circuit board and respectively envelop the third corners of the first, second surfaces and the fourth corners of the first, second surfaces. 
     The third and fourth corners of the first surface each has a first coupling structure while the third and fourth corners of the second surface each has a second coupling structure. Each of the metal sleeves has a first retaining structure corresponding to the first coupling structure and a second retaining structure corresponding to the second coupling structure. 
     Each of the metal sleeves has a base wall and an annular side wall connected to the base wall. The first retaining structure and the second retaining structure are respectively arranged on an inner portion of the annular side wall. 
     In summary, the instant disclosure provides the following features: Through the installation or detachment of the memory module, integrated circuits can obviate damages from static electricity that are stored in users&#39; hands by transmitting the static electricity to the ground terminal via metal parts. As a result, the usable life of the memory module can be extended. 
     In order to further understand the instant disclosure, the following embodiments and illustrations are provided. However, the detailed description and drawings are merely illustrative of the disclosure, rather than limiting the scope being defined by the appended claims and equivalents thereof. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a schematic diagram of a memory module according to the first embodiment of the instant disclosure; 
         FIG. 2  is a schematic diagram of the memory module illustrating another example of the first embodiment according to the instant disclosure; 
         FIG. 3A  is an exploded view of the memory module illustrating the second embodiment according to the instant disclosure; 
         FIG. 3B  is an assembled view of the memory module illustrating the second embodiment according to the instant disclosure; 
         FIG. 4A  is an exploded view of the memory module illustrating the third embodiment according to the instant disclosure; and 
         FIG. 4B  is an assembled view of the memory module illustrating the third embodiment according to the instant disclosure. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The aforementioned illustrations and detailed descriptions are exemplarities for the purpose of further explaining the scope of the instant disclosure. Other objectives and advantages related to the instant disclosure will be illustrated in the subsequent descriptions and appended drawings. 
     Embodiment 1 
     Please refer to  FIGS. 1 and 2  as the schematic diagrams illustrating a memory module  1  according to the first embodiment of the instant disclosure. The memory module  1  includes a printed circuit board  10  and a detachable assembly  20 . 
     Specifically, the printed circuit board  10  is formed by a plurality of packaged integrated circuits  11  and a module card  12  in which the peripheral portions of the packaged integrated circuits  11  have a plurality of metal pins disposed thereon. A surface of the module card  12  further has metal patterns formed thereon and apertures (not shown in figures) for soldering the metal pins thereon. In addition, the printed circuit board  10  further includes a terminal portion  13  and a free portion  14  arranged away from the terminal portion  13 . The terminal portion  13  is defined with a metal contact region  130  thereon for inserting into a memory slot S of a computer motherboard, thus, the memory module  1  can store programs and data into the computer system. 
     The detachable assembly  20  includes a plurality of metal parts  21  disposed on the free portion  14  of the printed circuit board  10 . In the instant embodiment, the metal parts  21  are metal foils  21 A (such as copper foil), of which the quantity is set as four, and are disposed in pairs on the free portion  14  of the printed circuit board  10 . The metal parts  21  are disposed in pairs on the free portion  14  of the printed circuit board  10 . Furthermore, the two pairs of metal foils  21 A are arranged with a predetermined distance D therebetween, in which each metal foil  21 A has a substantially square shape and an area to facilitate users&#39; fingers to exert force thereon. 
     Notably, the predetermined distance D is not specifically limited. As long as the users can evenly exert force onto the printed circuit board  10 , the distance is the predetermined distance between the two pairs of metal foils  21 A. Moreover, the quantity and dimensions of the metal foils  21 A are not specifically limited and can be adjusted based on the product specifications. 
     Furthermore, the metal contact region  130  of the terminal portion  13  includes a plurality of ground terminals  131 . The first surface  16  and the second surface  17  of the printed circuit board  10  respectively have a plurality of metal traces  15 . An end of the metal trace  15  is coupled to the metal foil  21 A and the other end is coupled to the ground terminal  131  for transmitting static electricity from the metal foil  21 A to the ground terminal  131  and successively transmitting from the ground terminal  131  to surroundings outside of the computer system. 
     In further details, the printed circuit board  10  has a first surface  16  and an opposing second surface  17 . The first and second surface  16 ,  17  each has a first corner  161 ,  171  and a second corner  161 ,  172  arranged proximate to the terminal portion  13 , and a third corner  163 ,  173  and a fourth corner  164 ,  174  arranged away from the terminal portion  13 . In a more preferable embodiment, the metal foils  21 A are respectively disposed on the third corner  163  of the first surface  16 , the fourth corner  164  of the first surface  16 , the third corner  173  of the second surface  17 , and the fourth corner  174  of the second surface  17  (as shown in  FIG. 1 ). 
     As a result, users can evenly exert force with two hands to ensure the installation and the detachment of the memory module  1  respectively on and from the memory slot S of the computer motherboard. Specifically, during the installation or detachment of the memory module  1 , integrated circuits  11  can obviate damages from static electricity that are stored in users&#39; hands by transmitting the static electricity to the ground terminal  131  via metal foils  21 A. 
     In more details, the aforementioned corners are provided with further definitions. The printed circuit board  10  also has two long sides  18  and two relatively short sides  19 , in which each long side  18  intersects with two relatively short sides  19 , and vice versa. The first corners  161 ,  171 , second corners  162 ,  172 , third corners  163 ,  173 , and the fourth corners  164 ,  174  are respectively arranged on four intersections of two long sides  18  and two relatively short sides  19 . The aforementioned example is a more preferred embodiment of the instant disclosure. The metal foil parts (metal foils) of the instant disclosure can also be configured in pairs and arranged on the first surface  16  and second surface  17  of the printed circuit board  10  relatively proximate to the third corners  163 ,  173  and the fourth corners  164 ,  174  of the first and second surfaces  16 , 17  (as shown in  FIG. 2 ). 
     Second Embodiment 
     Please refer to  FIGS. 3A and 3B  as the schematic diagram of the memory module illustrating the second embodiment according to the instant disclosure. The second embodiment differs from the first embodiment in that the metal parts  21  of the instant embodiment is a plurality of metal sleeves  21 B and the quantity is set as two. 
     In particular, the two metal sleeves  21 B respectively envelop the free portions  14  of the memory module  1 . Specifically, the two metal sleeves  21 B respectively envelop the third corners  163 ,  173  and the fourth corners  164 ,  174  of the first and second surfaces  16 ,  17 . Each metal sleeve  21 B substantially resembles an L shape and the dimensions are not specifically limited. Furthermore, each metal sleeve  21 B has a base wall  211 B and an annular side wall  212 B. The annular side wall  212 B has two opposing side surfaces and the two opposing side surfaces are formed with a predetermined distance therebetween. The predetermined distance is slightly smaller than the thickness of the printed circuit board  10  such that the metal sleeves  21 B are coupled onto the printed circuit board  10 . 
     Third Embodiment 
     Please refer to  FIGS. 4A and 4B  as the schematic diagrams of the memory module illustrating the third embodiment according to the instant disclosure. The third embodiment differs from the second embodiment in that the printed circuit board  10  of the instant embodiment has a plurality of first coupling structures  165  and a plurality of second coupling structures  175 . In addition, each metal sleeve  21 B substantially resembles an L shape and has a first retaining structure  213 B and a second retaining structure  214 B. 
     In the instant embodiment, the quantity of the first coupling structure  165  and the second coupling structure  175  is set as two. Two first coupling structures  165  are respectively arranged on the third corner  163  and the fourth corner  164  of the first surface  16  and two second coupling structures  175  are respectively arranged on the third corner  173  and the fourth corner  174  of the second surface  17 . Moreover, the first retaining structure  213 B and the second retaining structure  214 B are respectively arranged on an inner portion of the two opposing side surfaces of the annular side wall  212 B. The first retaining structure  213 B is mutually coupled with the first coupling structures  165  and the second retaining structure  214 B is mutually coupled with the second coupling structures  175 . 
     As an example, the first coupling structures  165  and the second coupling structures  175  can be various shapes of protrusions or coupling structures while the first retaining structure  213 B and the second retaining structure  214 B can be slots or grooves corresponding to the coupling structures, and vice versa. 
     In summary, the instant disclosure provides features and functions such as during the installation or detachment of the memory module  1 , users can evenly exert force with two hands to ensure the installation and the detachment of the memory module  1  respectively on and from the memory slot S of the computer motherboard. Also, reliability of the electrical connection between the memory module  1  and the computer system can be assured such that the computer system can function normally. Moreover, during the installation or detachment of the memory module  1 , integrated circuits  11  can obviate damages from static electricity that are stored in users&#39; hands by transmitting the static electricity to the ground terminal  131  via metal parts  21 . As a result, the usable life of the memory module  1  can be extended. 
     The figures and descriptions supra set forth illustrated the preferred embodiments of the instant disclosure; however, the characteristics of the instant disclosure are by no means restricted thereto. All changes, alternations, combinations or modifications conveniently considered by those skilled in the art are deemed to be encompassed within the scope of the instant disclosure delineated by the following claims.