Abstract:
Disclosed is a slide-type mobile communication terminal capable of mounting a memory card, wherein the memory card can be easily mounted/detached and a mounted state of the memory card can be stably maintained while minimizing a thickness increase of the terminal due to the mount of the memory card, by forming a receiving recess for mounting the memory card on a rear surface of a slide cover.

Description:
CROSS-REFERENCE TO RELATED APPLICATION 
   The present application is claiming priority of Korean Patent Application No. 10-2004-0014475, filed on Mar. 4, 2004, the content of which is herein incorporated by reference. 
   BACKGROUND OF THE INVENTION 
   1. Field of the Invention 
   The present invention relates to a slide-type mobile communication terminal capable of mounting an memory card, wherein the memory card can be easily mounted/detached and a mounted state of the memory card can be stably maintained with minimizing an increase in the mobile communication terminal&#39;s thickness due to the mount of the memory card, by providing a structure capable of mounting the memory card to a rear surface of slide cover composing the mobile communication terminal. 
   2. Description of the Related Art 
   Since a mobile communication terminal (also referred as “terminal” hereinafter) such as a cellular phone or a PDA (Personal Digital Assistant) terminal pursues a handset having multi-functions, considering a VOD (Video On Demand) or MPEG function, a problem of a memory capacity is on the rise. 
   Like this, in order to supplying an insufficient memory of the terminal, an memory card has been used. The memory card is a very inexpensive storage device and communication media, which is commonly used all over the world. It is designed to use in various machines such as an electronic toy, an electronic organizer, a PDA terminal, a digital camera, a smart phone, a digital recorder, a MP3 player and a pager, etc. as well as a cellular phone. In addition, the memory card has an excellent performance for its convenience of carrying and cost. Additionally, it has advantages of low power consumption and a rapid data processing using a memory card interface. 
   Many kinds of memory cards such as mini, super-slim and stick types are currently used. Such memory cards correspond to bridge media capable of moving between different devices. One of important characteristics of memory card is a convenient handling. Miniaturization and multi-functions of the memory card are absolutely required to embody a compact hardware and a multi-function handset and very important for a generation of a new era digital device (hardware). In addition, the memory card should be designed to easily use it, from a user interface point of view. 
   The current memory card has been developed to have a size of a stamp and to have a form such that anybody can use it easily. In addition, it has a high generality of recordable data, so that it can be used in various devices from an AVC (Advanced Video Coding) to an electric home appliance. 
   However, when the memory card is mounted to a slide-type mobile communication terminal, there are problems that not only the terminal increases in volume but mount/detach of the memory card are inconvenient. 
   The slide-type mobile communication terminal has a structure that a slide cover is moved slidingly against a main body, while a hinged (or folder) type mobile communication terminal has a structure that a cover is pivoted to be opened/closed for a main body. 
   In such a slide-type mobile communication terminal, typically, key buttons are formed on the main body and its slide cover is provided with a large LCD screen. Accordingly, even while the slide cover is closed, it is possible to use the large LCD screen and various function keys. 
   In addition, compared to the folder type mobile communication terminal of which cover has LCD screen on both sides of it respectively, a thickness of the slide-type mobile communication terminal is relatively thin because only one LCD screen is provided. 
   Conventionally, an memory card is mounted to the slide-type mobile communication terminal as follows. That is, the memory card is mounted to a rear part of the main body at which a battery is mounted, or is inserted into a side surface of the main body. 
   However, according to the former method, the battery should be detached from the main body, in order to mount/detach the memory card. In addition, it is difficult to design the terminal due to a restraint of space, and a thickness of the main body is increased. 
   The latter is a method of inserting the memory card into a side surface of the terminal main body. However, since the memory card is not completely inserted and partially protrudes to the outside, an external appearance of the terminal is spoiled. In particular, if the terminal falls to the floor under a state that the memory card is inserted, the memory card is apt to be severely damaged. 
   SUMMARY OF THE INVENTION 
   Accordingly, the present invention has been made to solve the above-mentioned problems occurring in the prior art. The object of the present invention is to provide a slide-type mobile communication terminal capable of mounting an memory card, wherein the memory card can be easily mounted/detached and a mounted state of the memory card can be stably maintained with minimizing an increase in the mobile communication terminal&#39;s thickness due to the mount of the memory card, by providing a structure capable of mounting the memory card to a rear surface of slide cover composing the mobile communication terminal. 
   In order to accomplish the objects, there is provided a slide-type mobile communication terminal comprising a receiving recess formed on a rear surface of a slide cover so as to mount an memory card; guides guiding an entry of the memory card and preventing the mounted memory card from deviating; and a socket connecting the memory card electronically with a main PCB which is contained in the slide cover. 
   As described above, according to the invention, the memory card is mounted to the receiving recess formed on the rear surface of the slide cover. Accordingly, the receiving recess and the memory card mounted therein are exposed to the outside simply by pushing-up the slide cover against the main body. 
   Accordingly, it is possible to easily mount/detach the memory card compared to the prior method that demands battery detaching from terminal&#39;s main body for mounting/detaching of the memory card of necessities, and to form the receiving recess for mounting the memory card without increasing the thickness of the slide cover. 
   Meanwhile, it is preferred that the receiving recess is formed on a rear surface of the slide cover, which is exposed to the outside without facing the main body in state that the slide cover is entirely pushed-up against the main body. 
   More preferably, the receiving recess is formed to have a same depth as a thickness of the memory card or more. 
   According to the invention, the socket may comprise a contact terminal of which one end is connected to the main PCB electronically and the other end is connected to terminal pin of the memory card electronically; a sidewall part supporting one side of the contact terminal; and a ceiling part supporting the upper surface of the contact terminal by extending from the sidewall part toward entrance of the receiving recess. 
   The contact terminals may comprise a solder pad part soldered on the main PCB; a column part upward extending from one side of the solder pad part and embedded in the sidewall part; and a sliding-contact part contacting with the terminal pins of the memory card by extending from the column part to the entrance of the receiving recess along the ceiling part. 
   In addition, the socket may further comprise a support part stabilizing the contact between the terminal pin of the memory card and the sliding-contact part of the contact terminal. 
   According to the invention, the memory card comprises a MINI SD (Mini Secure Digital) card, a SD card, a MMC (Multi Media Card), a SM (Smart Media) card and a Sony memory stick. 

   
     BRIEF DESCRIPTION OF THE DRAWINGS 
     The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: 
       FIG. 1  shows a MINI SD card as an example of a memory card; 
       FIG. 2  shows terminal pins of the MINI SD card; 
       FIG. 3  shows a slide-type mobile communication terminal mounting a memory card; 
       FIG. 4  shows enlarged appearance for the part at which memory card is mounted. 
       FIG. 5  shows a state that the memory card is advanced into a receiving recess; 
       FIG. 6  is a cross-section along a line A-A in  FIG. 5 ; 
       FIG. 7  shows a state that the memory card is completely mounted in a receiving recess; 
       FIG. 8  shows a cross-section along a line A-A in  FIG. 7 ; 
       FIG. 9  shows a cross-section along a line B-B in  FIG. 7 ; 
       FIG. 10  shows an internal structure of a socket according to a preferred embodiment of the invention; 
       FIG. 11  shows a state that a memory card is inserted into the socket according to a preferred embodiment of the invention; 
       FIG. 12  shows a ceiling part of the socket; and 
       FIG. 13  shows a sidewall part of the socket. 
   

   DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
   Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. 
   We explain a general structure of a memory card with reference to  FIG. 1  and  FIG. 2  before specifically describing a slide-type mobile communication terminal of the invention. 
   Each of  FIG. 1  and  FIG. 2  shows a MINI SD (Mini Secure Digital) card as an example of external memory card capable of interfacing with a mobile communication terminal. 
   It should be noted that a SD card, a MMC (Multi Media Card, which has a same use or similar to the SD card), a SM (Smart Media, which can interface with a mobile communication terminal and a MP3 player) card and a Sony memory stick (which can primarily interface with a mobile communication terminal and electronic products available from the Sony corporation), etc. can be applied to the invention in the same manner. Hereinafter, the above-mentioned various memory cards will be commonly referred to as a ‘memory card’. 
   As shown in  FIG. 1  and  FIG. 2 , the memory card  10  is provided with a connection pad  12  having plural terminal pins on one side thereof. 
   The memory card  10  shown in  FIG. 2  comprises 11 terminal pins (PIN  1 ˜PIN  11 ). The number of the terminal pins may be same as that of the MINI SD card shown in  FIG. 2  or different slightly according to kinds of the memory card. In addition, the size thereof may be different more or less according to kinds of the memory card. 
   The terminal pins  14  have typically functions as shown in a following Table 1, respectively. 
   
     
       
             
             
             
             
           
         
             
                 
               TABLE 1 
             
             
                 
                 
             
             
                 
               Pin No. 
               Name 
               Function 
             
             
                 
                 
             
           
           
             
                 
               PIN 1 
               CD/DAT3 
               Card Detect, Data I/O 
             
             
                 
               PIN 2 
               CMD 
               Command 
             
             
                 
               PIN 3 
               VSS 
               Ground 
             
             
                 
               PIN 4 
               VDD 
               Supply Voltage 
             
             
                 
               PIN 5 
               CLK 
               Clock 
             
             
                 
               PIN 6 
               VSS 
               Ground 
             
             
                 
               PIN 7 
               DAT 0 
               Data Line [Bit 0] 
             
             
                 
               PIN 8 
               DAT 1 
               Data Line [Bit 1] 
             
             
                 
               PIN 9 
               DAT 2 
               Data Line [Bit 2] 
             
             
                 
               PIN 10 
               NC 
               For Future Use 
             
             
                 
               PIN 11 
               NC 
               For Future Use 
             
             
                 
                 
             
           
        
       
     
   
   Hereinafter, the invention will be now described. 
     FIG. 3  shows a slide-type mobile communication terminal mounting a memory card and  FIG. 4  shows enlarged appearance for the part at which the memory card is mounted. 
   As shown in  FIG. 3  and  FIG. 4 , the invention, particularly, is applied to a slide-type mobile communication terminal  100  having a slide cover  200  combining with a main body  110 . 
   The slide-type mobile communication terminal  100  has a structure that the main body  110  and the slide cover  200  are sliding-movably combined via rails  112 .  FIG. 3  and  FIG. 4  show that the slide cover  200  is entirely pushed-up. 
   According to the invention, a receiving recess  210  for mounting the memory card is formed in a section of the rear part of the slide cover  200 , which section is exposed to the outside without overlapping with the main body  110  in state that the slide cover  200  is entirely pushed-up. 
   Guides  220  are formed on both sides of the receiving recess  210 . The guide  220  guides an entry of the memory card  10  into the receiving recess  210 . In addition, the guides  220  support an outer surface of the mounted memory card  10  so as to maintain a stable mounted state of the memory card  10  and to prevent the memory card  10  from deviating from the receiving recess. 
   According to the invention, a socket  300  is formed on one side of an interior of the receiving recess. More specifically, the socket  300  is provided on a main PCB mounted in the slide cover  200  and protrudes to the outside through an opening part formed in an inner end of the receiving recess. 
   In addition, plural terminal pins provided to one end of the memory card  10  are electrically connected to the socket  300  shown as in  FIG. 3 . 
   According to the prior art, the memory card  10  is inserted into a rear part  110   a  of the main body  110 , on which the battery  114  is mounted. Accordingly, there was an inconvenience that the battery  114  should be detached from the main body  110  in order to mount and detach the memory card  10 . In addition, when the memory card  10  is mounted/detached, a user should turn off a power supply of the terminal and again turn on the power after mounting/detaching the memory card. 
   Additionally, in order to mount the memory card  10  to the part to which the battery is mounted, a thickness of the main body  110  should be increased. However, if the main body  110  is thickened, an external appearance of the terminal is somewhat gross, so that customers will look away from the terminal. Accordingly, the thickness of the battery  114  was obliged to be decreased in order to mount the memory card  10  without thickening the terminal. An electronic capacity of the battery  114 , as the result, was forced to be reduced, instead of increasing the thickness of the main body  110 . 
   However, according to the invention, the receiving recess  210  in which the memory card  10  is mounted is formed on the rear surface of the slide cover  200 , rather than the main body  110 . Meanwhile, a main PCB (Printed Circuit Board)  230  for driving a terminal screen  200   a  is provided in the slide cover  200 . The main PCB  230  consists of a very thin flexible PCB (FPCB) typically. 
   Accordingly, it is possible to form the receiving recess  210  for mounting the memory card  10  on the rear surface of the slide cover  200  without increasing the thickness of the slide cover. 
   In addition, it is possible to easily mount/detach the memory card  10  since the receiving recess  210  is exposed to the outside of the main body  110  by pushing-up the sliding cover  200  against the main body  110 . 
   Hereinafter, we describe a method of mounting the memory card to the slide-type mobile communication terminal with reference to accompanying drawings. 
   As shown in  FIG. 6 , one end of the memory card  10  is advanced into entrance of the receiving recess  210  and simultaneously pushed-in below the guides  220  formed on both sides of the receiving recess  210 .  FIG. 7  and  FIG. 8  show that the memory card  10  is completely mounted respectively. 
   Under a state that the memory card  10  is completely mounted in the recess, the terminal pins  14  of the memory card  10  are electrically connected to the socket  300 . Such connection is extended to the main PCB  230 . Accordingly, the mobile communication terminal and the memory card  10  are electrically connected to each other, so that it is possible to exchange information between them. 
   In such case, the guides  220  support the memory card  10  to maintain the mounted state stably, so that the memory card is not deviated contrary to a user&#39;s intention. In particular, since one end of the memory card  10  is inserted into the socket  300 , the memory card is more stably supported. 
     FIG. 9  is a view illustrating a state that the memory card  10  is completely received in the receiving recess  210  of the slide cover  200 , and corresponding to a sectional view along a line B-B in  FIG. 7 . 
   As shown in  FIG. 9 , the memory card  10  is mounted in the receiving recess  210  formed on the rear surface of the slide cover  200 . The guides  220  are formed on both sides of the receiving recess  210 . 
   In the embodiment shown in  FIG. 7 , the guides  220  have a structure that they are integrally extended as a part of the slide cover  200 . However, it is possible to provide the guides  220  to both sides of the receiving recess  210 , as a separate component from the slide cover  200 . 
   As shown in  FIG. 10  to  FIG. 13 , the socket  300  according to the invention rests on the main PCB  230  and protrudes through the opening part  240  formed on the inner end of the receiving recess  210 . 
   Specifically, the socket  300  comprises a sidewall part  310 , a ceiling part  320  and plural contact terminals  330 . 
   The sidewall part  310  is uprightly-mounted on the main PCB  230  of the slide cover  200 . The ceiling part  320  is extended from the sidewall part  310  toward a memory card entrance of the receiving recess  210  and supports the contact terminals  330 . 
   The contact terminals  330  are provided to correspond to numbers and positions of the terminal pins  140  of the memory card  10 . One end of the contact terminal  330  is electrically connected to the main PCB  230 , and the other end thereof is electrically connected to the terminal pin  140  of the memory card  10 . 
   Specifically, each of the contact terminals  330  can be separated into a solder pad part  331 , a column part  332  and a sliding contact part  333 . 
   The solder pad part  331  is a part soldered on the main PCB  230 , the column part  332  is a part that one side of the solder pad part  331  is uprightly extended, and the sliding-contact part  333  is an extended part from the upper column part  332  being bended to the entrance of the receiving recess  210 . The solder pad part  331  may be soldered to the main PCB  230  by a known SMD (Surface Mount Device) technique. 
   As can be clearly seen from  FIG. 11 , the column part  332  is embedded in the sidewall part  310  and the terminal pins  14  of the memory card  10  are electrically connected to the sliding-contact part  333  extended from the column part  332  along the ceiling part  320 . 
   The ceiling part  320  supports the sliding-contact part  333  and the memory card  10  is inserted tightly between the sliding-contact part  333  and the support part  311 . The memory card  10 , therefore, can maintain a stable mounting state by supporting of the sliding-contact part  333  and the support part  311  as shown in  FIG. 11 . 
   The socket  300  may further comprise a support part  311  that maintains stable connection between the terminal pins  14  of the memory card  10  and the sliding-contact part  333 . The support part  311  of which lower part lies on the main PCB supports the column part  332  of the contact terminals  330 . 
   In the above embodiment, the MINI SD card is described exemplarily regarding the memory card  10 . However, it should be noted that other memory cards such as a SD card, a MMC card, a SM card and a Sony memory stick, etc. also can be used. These cards are different only with regard to sizes and the number of terminal pins. 
   Accordingly, a memory card can be applied in the same manner described in the above embodiments if a size of the receiving recess  210  or the number of the contact terminals  330  of the socket  300  is adjusted to correspond to a size or the number of terminal pins of the memory card. 
   As described above, according to the invention, the memory card is mounted to the rear surface of the slide cover of the slide-type mobile communication terminal, and the socket and guides adapted to the structure are also provided. 
   According to the invention, the receiving recess for mounting the memory card is formed in the rear surface of the sliding cover. Accordingly, the receiving recess and the memory card are exposed simply by pushing-up the sliding cover against the main body. As a result of that, it is possible to easily mount/detach the memory card and form the receiving recess for mounting the memory card without increasing the thickness of the sliding cover. 
   Further, according to the invention, since the socket as well as both guides support the memory card mounted in the receiving recess, it is possible to stably mount the memory card. 
   While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.