Abstract:
A heat sink module includes a fan set and a heat sink plate. The fan set is integrated as a whole, reducing manufacture time, and the material of the fan set is plastic, thus reducing the weight as well. Due to the hook design of the fan set and the ear design of the heat sink plate, the number of screws is reduced. Furthermore, the screws pass through the first lug of the heat sink plate and the second lug of the fan set, so that the heat sink plate and the fan set are fixed on the motherboard, and thereby the number of the parts to be fixed by screws is reduced. Heat from the heat source on the motherboard is conducted to the fan set to be dispersed through the heat sink plate extending to the heat source and covering the fan set.

Description:
BACKGROUND OF THE INVENTION 
   1. Field of Invention 
   The present invention relates to a heat sink device and more particularly to a heat sink module having the design of reducing the screws and being suitable for dissipating heat produced by a chip on the motherboard. 
   2. Related Art 
   The development of information science and technology enables the computer to be widely used. As the computing function and speed of the electric elements, such as the central processing unit and the display chip, are enhanced, the high speed and large amount of computing results in a problem of high temperature accordingly. However, there is somewhat a limitation to the operation temperature of each of the electric elements. For the electric elements, high temperature affects operation efficiency, and in some severe circumstances, high temperature may further damage or even burn the electrical elements. Therefore, the heat sink has become crucial in product design. In order to make the computer run normally under normal temperature, the heat sink device has become an essential means for the computer. 
   The high temperature produced due to the high speed or larger amount of computing of the central processing unit of the ordinary computer is reduced as the generated heat is taken away by the assembled heat sink module. The conventional assembled heat sink module is fixed on the motherboard mainly by locking screws. That is, the heat sink plate is locked on the fan seat (by about 3-4 screws), and at the same time, the heat sink modules are locked to the motherboard respectively (by about 3-4 screws). Therefore, it takes a long time to assemble. For the company, more operators are needed for the product line for assembly and fixation of different portions. As such, the manufacturing cost is raised due to the increasing number of operators, and the portions needing to be assembled and fixed may be left out due to the carelessness of the operators. Thus, it is a necessity to reduce the portions to be locked by screws and the procedures. 
   Additionally, based upon consumers&#39; demands for portable computers and due to gradually reduced private life space, it is an object of the technological revolution to make the portable computer light and thin. Consequently, the heat sink required by the heat element is also developed towards the same object, i.e. the weight of the heat sink directly influences the thinning of the portable computer. And the conventional fan set generally includes a fan seat and fan blades, and more labor hours and operators are needed for assembly, thus increasing the manufacturing cost. 
   SUMMARY OF THE INVENTION 
   In view of the above problems, a main object of the present invention is to provide a heat sink module to solve the problems or disadvantages of the prior art. 
   In a heat sink module, the heat sink plate extending to the heat source and covering the fan set is used to conduct the heat from the heat source on the motherboard to the fan set for heat sinking. The heat sink module includes a fan set and a heat sink plate. The fan set is integrated as a whole, reducing manufacturing time, and the material of the fan set is plastic, thus reducing the weight as well. Furthermore, the material of the heat sink plate is of high temperature resistance and preferable heat conductivity; for example aluminum or an aluminum alloy, thus providing a good heat conduction effect. As such, the heat generated from the heat source is taken to the fan set to be dissipated. The fan set is fixed to the heat sink plate by the design of the hook portion of the fan set catching the ear portion of the heat sink plate, so that the heat sink plate can cover and be fixed on the fan set, and the number of screws is reduced. At the same time, the screws pass through the first lug of the heat sink plate and the second lug of the fan set, so that the heat sink plate and the fan set are fixed on the motherboard simultaneously. Conventionally, the heat sink plate is fixed to the fan, and the heat sink needs to be fixed on the motherboard, and the fan also needs to be fixed on the motherboard. By the method of the present invention, the number of screws and the manufacture cost are reduced, and the frequency of cases in which portions in need of locking screws are neglected due to the carelessness of operators during manufacturing is further reduced. 
   The detailed features and advantages of the present invention are described in the detailed description below. The technical contents of the present invention are apparent to those skilled in the art from the contents below and those skilled in the art can implement the present invention accordingly. And based upon the contents, claims, and drawings of the specification, any of those skilled in the art can easily understand the related objects and advantages of the present invention. 
   The above descriptions, related to the contents and the following detailed description of the present invention, are intended to demonstrate and explain the principle of the present invention, and provide a further explanation for the claims of the present invention. 
   Further scope of applicability of the present invention will become apparent from the detailed description given hereinafter. However, it should be understood that the detailed description and specific examples, while indicating preferred embodiments of the invention, are given by way of illustration only, since various changes and modifications within the spirit and scope of the invention will become apparent to those skilled in the art from this detailed description. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The present invention will become more fully understood from the detailed description given herein below for illustration only, and which thus is not limitative of the present invention, and wherein: 
       FIG. 1  is a view of the first embodiment of the heat sink module of the present invention; 
       FIG. 2  is an exploded view of the heat sink module structure of the present invention; 
       FIG. 3  is a partial enlarged view before the hook portion catches ear portion in  FIG. 2 ; 
       FIG. 4  is a partial enlarged view after the hook portion catches the ear portion in  FIG. 2 ; and 
       FIG. 5  is a view of the second embodiment of the heat sink module according to the present invention. 
   

   DETAILED DESCRIPTION OF THE INVENTION 
   In order to further understand the objects, structure, features, and functions of the present invention, the detailed description is given below in conjunction with the embodiments. 
   As shown in  FIG. 1 , it is a view of the first embodiment of the heat sink module of the present invention. The motherboard  100  has many electronic elements thereon, but the temperature of these electric elements is relatively raised due to high speed computing. However, there is somewhat a limitation to the operation temperature of each of the electric elements. For the electric elements, high temperature affects operation efficiency, and in some severe circumstances, high temperature may further damage or even burn the electrical elements. Therefore, the heat sink has become crucial in product design. In the drawing, the heat sink function is illustrated by two electrical elements for the heat source, for example, a first chip  200  and a second chip  300 . The first chip  200  is covered with a heat sink plate  20  made of a material with high temperature resistance and preferable heat conductivity, for instance aluminum or an aluminum alloy. And the second chip  300  is also covered with a first heat sink  60  made of a material with high temperature resistance and preferable heat conductivity, for example aluminum or an aluminum alloy. A fan set  10  is disposed on a motherboard  100  for heat sinking. The fan set  10  is covered with a heat sink plate  20  extending to the first chip  200 . A heat pipe  30  made of the material with high temperature resistance and preferable heat conductivity (for instance aluminum or an aluminum alloy) is further added onto the heat sink plate  20  to enhance the heat conduction effect. If an electrical element is disposed at the position of the second chip  300 , the heat can be conducted from a first heat sink  60  to a second heat sink  70  on the fan set  10  through a second heat pipe  50  made of a material with high temperature resistance and preferable heat conductivity (for example aluminum or an aluminum alloy), and then dissipated through the fan set  10 . Using such a design, the electrical elements in need of dissipating heat can be mounted on the motherboard  100  freely, without limitation as to the positions of the electrical elements in need of dissipating heat. 
   As shown in  FIG. 2 , it is an exploded view of the structure of the heat sink module of the present invention. The heat sink module is mainly comprises a fan set  10  and a heat sink plate  20 . The fan blade  13  and the fan seat  14  of the conventional fan set  10  are assembled individually, while the design of integration can reduce the manufacture time. Furthermore, the material of the fan set  10  is plastic, which can further meet the light weight requirement of current design. Since the heat sink plate  20  made of high temperature resistance and preferable heat conductivity material has favorable heat conduction effect, the heat generated by the heat source can be taken to the fan set  10  to be dissipated. And a first heat pipe  30  is disposed on the heat sink plate  20 , further enhancing the heat conduction effect. At the same time, the heat sink plate  20  acts as the cover of the fan set  10 , thus saving the cost of the cover of the fan set  10 . 
   For the design of fixing the heat sink plate  20  and the fan set  10 , the heat dissipation plate  20  and the fan set  10  are locked conventionally by screws  40 . As such, more operators are needed for the product line of locking screws, thus the manufacturing cost is increased, and the portions in need of locking screws  40  are neglected due to the carelessness of the operators. Therefore, it is indeed a great contribution to production to reduce the portions in need of locking screws  40 . In the present invention, in order to reduce the portions in need of locking screws  40 , hook portions  11  are designed around the fan set  10 . Although three hook portions  11  are shown in the drawing, the number of hook portions  11  can be one, two, or more than three in practice. Correspondingly, the ear portions  21  are disposed on the heat sink plate  20  opposite to the hook portions  11  of the fan set. Similarly, although three ear portions  21  are shown in the drawings, the number of ear portions  21  can be one, two, or more than three in practice. One may refer to a partial enlarged view, as shown in  FIG. 3 , before the hook portions catch the ear portions in  FIG. 2 . When the heat sink plate  20  covers the fan set  10 , the relative positions of the ear portions  21  of the heat sink plate  20  and the hook portions  11  of the fan set  10  are shown in the drawing. One may refer to a partial enlarged view, as shown in  FIG. 4 , after the hook portions catches the ear portions in  FIG. 2 , when the hook portions  11  of the fan set  10  catches the ear portions  21  of the heat sink plate. The ear portions  21  of the heat sink plate  20  is pushed toward the hook portions  11  of the fan set  10 , and after the ear portions  21  is pushed to the interior of the hook portions  11 , the hook portions  11  catches the ear portions  21 , so that the ear portions  21  cannot move up and down. As shown in  FIG. 2 , when the heat sink plate  20  is disposed on the fan set  10  firstly, the first opening  23  of the heat sink plate  20 , right opposite to the fan blade  13 , is used to dispose the heat sink plate  20  onto the fan set  10 . As shown in the drawing, the hook portions  11  are disposed on both the right and left sides and in front of the hook portions  11  respectively. When the ear portions  21  of the heat sink plate  20  is pushed to the hook portions  11 , the ear portions  21  on both sides of the heat sink plate  20  are disposed aligning with the hook portions  11  on both sides of the fan set  10 . At the same time, the hook portions  11  in front of the fan set  10  are set in the second opening  24  in front of the heat sink plate  20 . Subsequently, the heat sink plate  20  is pushed towards the hook portions  11 , and at the same time, the ear portions  21  are pushed to the interior of the hook portions  11 . The hook portions  11  are arranged in a triangle like in the drawing, so that the heat sink plate  20  can be further prevented from moving forward horizontally. Furthermore, the second lugs  12  are disposed around the fan set  10 , although only two second lugs  12  are shown in the drawing, the number of second lugs  12  can be one or more than two in practice. Correspondingly, the first lugs  22  are disposed on the heat sink plate  20  corresponding to the position of the second lugs  12  of the fan set  10 . Similarly, although only two first lugs  22  are shown in the drawing, the number of first lugs  22  can be one or more than two. A second lockhole  121  is set in the second lug  12 , and the first lockhole  221  is set on the first lug  22 . The first lug  22  can be folded downwards according to the design of the present invention, so that the first lug  22  of the heat sink plate  20  is overlapped with the second lug  12  of the fan set  10  closely, when the heat sink plate  20  covers the fan set  10 . At the same time, the first lockhole  221  of the first lug  22  is aligned with the second lockhole  121  of the second lug  12 . And then the screw  40  passes through the first lockhole  221  of the first lug  22  and the second lockhole  121  of the second lug  12 , and then fixed on the motherboard  100 . Finally, the screw  40  passes through the four third openings  25  in front of the heat sink plate  20  respectively, and then fixed on the motherboard  100 . Conventionally, the heat sink plate  20  and the fan set  10  are fixed together, and then the heat sink plate  20  and the fan set  10  are fixed on the motherboard  100  respectively. As such, more screws  40  and operators as well as procedures for locking screws  40  are needed, thus consuming manufacturing costs. Therefore, the present invention employs some designs to improve the problems in the aspect. 
   Please refer to  FIG. 5 , which is a view of the second embodiment of the heat sink module according to the present invention. If the position of the heat source is different from that of the first chip  200  as shown in  FIG. 1 , the second heat pipe  50  can be used to conduct heat from the farther heat source to the second heat sink plate  70  of the fan set  10  as shown in  FIG. 5 . The first heat sink  60  is fixed on the motherboard  100 , so that the second chip  300  is sandwiched between the first heat sink  60  and the motherboard  100 . A second heat pipe  50  is disposed on the first heat sink  60  and extends to the heat sink plate  20  on the fan set  10 . The heat from the second chip  300  is conducted to the second heat sink  70  of the fan set  10  through the second heat pipe  50 , and then dissipated by the fan set  10 . Thus, the problem of the position of the heat source is solved. 
   The invention being thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.