Patent Publication Number: US-2013242481-A1

Title: Waterproof case for portable terminal

Description:
PRIORITY 
     This application claims the benefit under 35 U.S.C. §119(a) of a Korean patent application filed in the Korean Industrial Property Office on Mar. 13, 2012 and assigned Serial No. 10-2012-0025358, the entire disclosure of which is hereby incorporated by reference. 
     BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present invention relates to an additional device for a portable terminal More particularly, the present invention relates to a detachable waterproof case configured to provide a waterproof function in daily life. 
     2. Description of the Related Art 
     In general, a portable terminal corresponds to a device that enables a user to enjoy a communication function with another user, a data communication function, such as access to Internet, mobile banking and multimedia file transfer, access to games or music, and/or a multimedia function, such as reproduction of moving images. Prior to recent technological advancements, such a portable terminal was generally specialized to an individual function, for example, a communication function, a game function, a multimedia function, an electronic scheduler function, or the like. However, due to the recent development of electric/electronic technologies and telecommunication technologies, it has become possible to enjoy various functions with a single portable terminal. In other words, because of recent advancements, a portable terminal may correspond to a single communication terminal that performs multiple functions previously performed by independent devices. 
     Portable terminal users generally use a protective case with their portable terminals in order to prevent the portable terminal from being damaged by scratches or from being fractured by impact. In addition, because of the increasing importance of portable terminals to their users, portable terminals increasingly are becoming exposed to water leisure sport activities or winter-season leisure sport activities. Consequently, it becomes necessary to provide a waterproof function to a portable terminal in order to prevent water from infiltrating into the portable terminal. Protective cases according to the related art which are frequently used to protect the portable terminal from scratches or impact, do not provide a waterproof function. For example, although protective cases according to the related art may provide protection to an external appearance of the portable terminal or an ornamental design to the portable terminal, such protective cases do not protect the portable terminal from water to which the portable terminal may be exposed. Therefore, it is necessary to use a separate waterproof case in order to provide a waterproof function required in a special environment. 
     An end user of a portable terminal usually purchases and uses a bag-shaped waterproof case. The users may simply carry such a bag-shaped waterproof case, and may carry a portable terminal in a state in which the portable terminal is put into the waterproof case to be sealed, as desired. Another type of waterproof structure easily used by the end user is configured to wrap a terminal with vinyl or the like, to seal the rear side of the terminal with adhesive tape or the like, and then to couple a separate protective case thereto. Although the bag-shaped protective case and the protective case wrapped by vinyl as described above are advantageous in that they can be easily used and are inexpensive, they reveal a limitation in repeated use due to poor durability. In addition, the protective cases have a disadvantage in that they deteriorate the readability of a display device because the waterproof case and the vinyl have a low transmittance and may cause screen distortion when crumpled. 
     There is another type of waterproof case that is constituted by combining a first case part for enclosing the front side of a terminal and a second case part for enclosing the rear side of the terminal The waterproof case with this configuration is adapted to provide a sealing member for strengthening the waterproof performance in the inside thereof while enclosing the entirety of the terminal At this time, a waterproof case fabricated to be used only for a specific terminal may allow an external device and the terminal to be connected with each other through a separate cable. However, a waterproof case fabricated to be commonly used for any terminal requires the separation of a terminal in order to connect the terminal with an external device. In other words, those protective cases which enable a user to connect an external device to the portable terminal and which protect the portable terminal enclosed therein from water must be specifically designed for the portable terminal. The waterproof case constituted by combining two case parts as described above includes a separate locking device so as to keep the first and second case parts joined and sealed while the waterproof case is in use. However, the waterproof case constituted by combining the first and second case parts practically makes it impossible to manipulate the terminal In addition, due to the large volume thereof, it is impossible to use the waterproof case in daily life. Furthermore, the waterproof case has a problem in that the waterproof case deteriorates the readability of a display device because the screen of the display device is viewed through the first or second case. 
     As multimedia services through portable terminals have been strengthened recently, it is a recent trend to mount a touch screen to a portable terminal in place of a physical keypad. In this circumstance, an ordinary protective case provides merely an ornamental function or a protective function against physical impact, and a waterproof case practically makes it impossible to manipulate a terminal in a state in which the case provides a waterproof function to the terminal. 
     Therefore, a need exists for an a waterproof case for a portable terminal which is reduced in size and slimmed to be capable of providing an ornamental function and a protective function against physical impact like an ordinary protective case while providing a waterproof function in daily life. 
     The above information is presented as background information only to assist with an understanding of the present disclosure. No determination has been made, and no assertion is made, as to whether any of the above might be applicable as prior art with regard to the present invention. 
     SUMMARY OF THE INVENTION 
     Aspects of the present invention are to address at least the above-mentioned problems and/or disadvantages and to provide at least the advantages described below. Accordingly, an aspect of the present invention is to provide a waterproof case for a portable terminal which is reduced in size and slimmed to be capable of providing an ornamental function and a protective function against physical impact like an ordinary protective case while providing a waterproof function in daily life. 
     Another aspect of the present invention is to provide a waterproof case for a portable terminal which opens a part of the terminal, in particular a display device to prevent the deterioration of picture quality, and to enable the manipulation of a touch screen while providing a waterproof function in daily life. 
     In accordance with an aspect of the present invention, a waterproof case for a portable terminal is provided. The waterproof case includes a waterproof member assembled to the portable terminal to wrap an outer perimeter of the portable terminal, the waterproof member being formed with an opening for partially exposing the portable terminal, a protective member configured to wrap an outer perimeter of the waterproof member, the protective member being integrally formed with the waterproof member through dual injection molding, and a waterproof rib formed from an elastic material around the opening on an inner surface of the waterproof member, the waterproof rib being configured to come into close contact with the outer perimeter of the portable terminal. 
     Other aspects, advantages, and salient features of the invention will become apparent to those skilled in the art from the following detailed description, which, taken in conjunction with the annexed drawings, discloses exemplary embodiments of the invention. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The above and other aspects, features, and advantages of certain exemplary embodiments of the present invention will be more apparent from the following description taken in conjunction with the accompanying drawings, in which: 
         FIG. 1  is an exploded perspective view illustrating a waterproof case for a portable terminal in accordance with an exemplary embodiment of the present invention; 
         FIG. 2  is a perspective view illustrating a portable terminal coupled to a waterproof case such as, for example, the waterproof case illustrated in  FIG. 1 , according to an exemplary embodiment of the present invention; 
         FIG. 3  is a cross-sectional view taken by cutting a part of a waterproof case such as, for example, the waterproof case illustrated in  FIG. 2 , according to an exemplary embodiment of the present invention; 
         FIG. 4  is a cross-sectional view taken by cutting a waterproof rib along line A-A′ indicated in  FIG. 3  according to an exemplary embodiment of the present invention; 
         FIG. 5  is a cross-sectional view illustrating a variant embodiment of a waterproof rib such as, for example, the waterproof rib illustrated in  FIG. 3 , according to an exemplary embodiment of the present invention; 
         FIG. 6  is a cross-sectional view illustrating another variant embodiment of a waterproof rib such as, for example, the waterproof rib illustrated in  FIG. 3 , according to an exemplary embodiment of the present invention; 
         FIG. 7  is a cross-sectional view illustrating still another variant embodiment of a waterproof rib such as, for example, the waterproof rib illustrated in  FIG. 3 , according to an exemplary embodiment of the present invention; 
         FIG. 8  is a cross-sectional view illustrating a sealing member coupled to a waterproof case such as, for example, the waterproof case illustrated in  FIG. 2 , according to an exemplary embodiment of the present invention; 
         FIG. 9  is a cross-sectional view illustrating a variant embodiment of a sealing member coupled to a waterproof case such as, for example, the sealing member of  FIG. 1 , according to an exemplary embodiment of the present invention; 
         FIG. 10  is a perspective view illustrating a sealing member such as, for example, the sealing member of  FIG. 9 , according to an exemplary embodiment of the present invention; and 
         FIG. 11  is a perspective view illustrating a sealing member coupled to a waterproof case such as, for example, the sealing member of  FIG. 9 , according to an exemplary embodiment of the present invention. 
     
    
    
     Throughout the drawings, it should be noted that like reference numbers are used to depict the same or similar elements, features, and structures. 
     DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the invention as defined by the claims and their equivalents. It includes various specific details to assist in that understanding but these are to be regarded as merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. In addition, description of well-known functions and constructions may be omitted for clarity and conciseness. 
     The terms and words used in the following description and claims are not limited to the bibliographical meanings, but, are merely used by the inventor to enable a clear and consistent understanding of the invention. Accordingly, it should be apparent to those skilled in the art that the following description of exemplary embodiments of the present invention is provided for illustration purpose only and not for the purpose of limiting the invention as defined by the appended claims and their equivalents. 
     It is to be understood that the singular forms “a,” “an,” and “the” include plural referents unless the context clearly dictates otherwise. Thus, for example, reference to “a component surface” includes reference to one or more of such surfaces. 
       FIG. 1  is an exploded perspective view illustrating a waterproof case for a portable terminal in accordance with an exemplary embodiment of the present invention.  FIG. 2  is a perspective view illustrating a portable terminal coupled to a waterproof case such as, for example, the waterproof case illustrated in  FIG. 1 , according to an exemplary embodiment of the present invention.  FIG. 3  is a cross-sectional view taken by cutting a part of a waterproof case such as, for example, the waterproof case illustrated in  FIG. 2 , according to an exemplary embodiment of the present invention. 
     Referring to  FIGS. 1 to 3 , a waterproof case  100  for a portable terminal  200  in accordance with an exemplary embodiment of the present invention includes a waterproof member  101 , a protective member  102 , and a waterproof rib  112 , in which when the waterproof member  101  wraps the outer perimeter of the portable terminal  200 , the waterproof rib  112  comes into close contact with the outer perimeter of the portable terminal  200  so as to provide a waterproof function. According to exemplary embodiments of the present invention, the waterproof member  101  is provided with an opening to partially expose the portable terminal  200 . For example, the present exemplary embodiment exemplifies a construction in which the opening is formed to open the front face of the portable terminal  200 , so that a display device  219  of the portable terminal  200  is visually exposed. Although  FIG. 1  illustrates a construction formed by fabricating each of the waterproof member  101  and the protective member  102  in a predetermined shape and thereafter assembling the waterproof member  101  and the protective member  102 , the waterproof member  101  and the protective member  102  are formed of a synthetic resin material. According to exemplary embodiments of the present invention, the waterproof member  101  and the protective member  102  are preferably fabricated in an integrated structure through a dual injection molding process. 
     According to exemplary embodiments of the present invention, the portable terminal  200  includes a display device  219  (see  FIG. 3 ) protected by a window member  211 , and the portable terminal  200  may be provided with a key button  213  disposed at one end portion of the front side thereof, and a receiver module  215  disposed at the other end portion of the front side. 
     The waterproof member  101  is coupled to wrap the outer perimeter of the portable terminal  200 , and the waterproof member  101  is formed from an elastic material such as, for example, rubber, silicone, urethane, and/or the like. Because the waterproof member  101  is formed from an elastic material, the waterproof member  101  itself may come into close contact with the outer perimeter of the portable terminal  200  so as to provide a waterproof function. However, in order to improve the waterproof function, according to exemplary embodiments of the present invention, the waterproof rib  112  is formed on the inner surface of the waterproof member  110 . For example, the waterproof rib  112  protrudes from the inner surface of the waterproof member  101 , and the waterproof rib  112  is formed to surround the opening, thereby forming a looped curve. The waterproof member  101  tends to come into close contact with the outer perimeter of the portable terminal  200 , which makes the tip end of the waterproof rib  112  come into close contact with the outer surfaces of the portable terminal  200 . For example, it is possible to secure a more stable waterproof performance by forming the waterproof rib  112 . 
     According to exemplary embodiments of the present invention, the protective member  102  forms the practical outer appearance of the waterproof case  100 , and is formed from a rigid synthetic resin such as, for example, a polycarbonate material or the like. The protective member  102  is formed to enclose the outer perimeter of the waterproof member  101 , and is fabricated to be integrated with the waterproof member  101 . For example, the protective member  102  may be formed so as to be integrated with the waterproof member  101  through dual injection molding. That is, one of the protective member  102  and the waterproof member  101  is firstly molded, and thereafter the other one of the protective member  102  and the waterproof member  101  is molded in a state in which the firstly molded one is inserted into a mold fabricated to form the other member. According to exemplary embodiments of the present invention, the firstly molded one of the protective member  102  and the waterproof member  101  may be selected considering molding conditions, such as, for example, molding temperatures and pressures of the protective member  102  and the waterproof member  101 . In general, the member molded under a condition of higher temperature and higher pressure should be the first of the protective member  102  and the waterproof member  101  to be molded. 
       FIG. 4  is a cross-sectional view taken by cutting a waterproof rib along line A-A′ indicated in  FIG. 3  according to an exemplary embodiment of the present invention.  FIG. 5  is a cross-sectional view illustrating a variant embodiment of a waterproof rib such as, for example, the waterproof rib illustrated in  FIG. 3 , according to an exemplary embodiment of the present invention.  FIG. 6  is a cross-sectional view illustrating another variant embodiment of a waterproof rib such as, for example, the waterproof rib illustrated in  FIG. 3 , according to an exemplary embodiment of the present invention.  FIG. 7  is a cross-sectional view illustrating still another variant embodiment of a waterproof rib such as, for example, the waterproof rib illustrated in  FIG. 3 , according to an exemplary embodiment of the present invention. 
     Referring to  FIGS. 4 to 6 , a waterproof rib  112  may be closely contacted at various positions on the outer perimeter of a portable terminal  200 .  FIG. 4  illustrates a state in which the waterproof rib  112  illustrated in  FIG. 3  is closely contacted with a side surface of the portable terminal  200 .  FIGS. 5 to 7  illustrate variant embodiments of the waterproof rib  112 . According to exemplary embodiments of the present invention, it is apparent that in a real product, the waterproof ribs  112 ,  112   a ,  112   b ,  112   c  and  112   d  will be deformed and come into close contact with the outer perimeter of the portable terminal  200  at the overlapping parts, which are depicted in shadow, between the waterproof ribs  112 ,  112   a ,  112   b ,  112   c  and  112   d  and the housing  201  or window member  211  of the portable terminal  200  illustrated in  FIGS. 4 to 7 . 
     According to exemplary embodiments of the present invention, the portable terminal  200  includes a housing  201  forming the practical external appearance of the portable terminal  200 , and a window member  211  operatively coupled to the front side of the housing  201 , in which the window member  211  transmits a screen displayed on the display device  219  while protecting the display device  219 . For example, the window member  211  may operatively transmit light transmitted by the display device  219  such that the screen is viewable through the window member  211  while the window member  211  also protects the display device  219 . The boundary between the housing  201  and the window member  211  may be prone to water leakage. Consequently, according to exemplary embodiments of the present invention, a waterproof rib  112   a  may be configured to prevent water leakage along a boundary between the housing  201  and the window member  211 . For example,  FIG. 5  illustrates a structure in which the waterproof rib  112   a  is configured to come into close contract with the outer perimeter of the portable terminal  200  along the boundary between the housing  201  and the window member  211 . As a result, the waterproof member  101 , more specifically the waterproof rib  112   a  can assure the stable waterproof performance along the boundary of the housing  201  and the window member  211 .  FIG. 6  illustrates a construction in which the position of the waterproof rib  112   b  is changed so that the boundary between the housing  201  and the window member  211  is positioned within the area surrounded by the waterproof member  101  and the waterproof rib  112   b . As a result, it is possible to prevent water from approaching to the boundary between the housing  201  and the window member  211 , so that the waterproof performance can be secured.  FIG. 7  illustrates an example of a construction in which two rows of waterproof ribs  112   c  and  112   d  are formed to come into close contact with the outer perimeter of the housing  201  and the outer perimeter of the window member  221 , respectively, across the boundary according to an exemplary embodiment of the present invention. As illustrated in  FIGS. 5 to 7 , the waterproof ribs  112 ,  112   a ,  112   b ,  112   c  and  112   d  may be formed at various positions on the outer perimeter of the portable terminal  200 . 
     Referring to  FIGS. 4 to 7 , the position at which a waterproof rib  112 ,  112   a  or  112   b  comes into close contact may be positioned at any of the lateral sides and front side on the outer perimeter of the portable terminal  200 . At this time, when the waterproof rib comes into close contact with the front side of the portable terminal  200 , it is noted that the waterproof rib should come into close contact with the boundary between the housing  201  and the window member  211 , or the boundary between the housing  201  and the window member  211  should be positioned in a region enclosed by the protective member  102  and the waterproof rib. 
     According to exemplary embodiments of the present invention, the waterproof case  100  enables inputting and outputting of sound and connection of various connectors even in a state in which the portable terminal  200  is mounted therein. 
     For example, according to exemplary embodiments of present invention, the waterproof case  100  may be provided with through-holes corresponding to the sound input/output holes of the portable terminal  200 . Further, according to exemplary embodiments of the present invention, waterproof and water-permeable films  133   a ,  133   b  and  137  may be attached to the through-holes, respectively, so as to provide a waterproof function in daily use. In addition, according to exemplary embodiments of the present invention, the waterproof case  100  may be provided with connector holes connected to various connectors, such as an interface connector or a ear jack of the portable terminal  200 , and sealing members  104   a  and  104   b , so that the waterproof case  100  allows the portable terminal  200  and an external device to be interconnected in a state in which the portable terminal  200  is assembled to the waterproof case  100 . For example, the waterproof case  100  may include connector holes corresponding sealing members  104   a  and  104   b  so as to permit a user to connect an external device to the portable terminal  200  when the portable terminal  200  is mounted in the waterproof case  100 . According to exemplary embodiments of the present invention, the term “external device” may correspond to a device, which is connected to the portable terminal  200  (e.g., usually through a cable and a connector), such as, for example, a charger, a personal computer, an earphone, a hands-free headset kit, and the like. 
     The through-holes are formed to correspond to sound input holes (i.e., holes operatively connected to a microphone), and sound output holes (i.e. holes operatively connected to a speakerphone) of the portable terminal  200 , respectively. As an example, the through-holes are formed by interconnecting the holes  113   a ,  113   b  and  117  and the holes  123   a ,  123   b  and  127  formed in the waterproof member  101  and the protective member  102 , respectively, in which the sizes or diameters of the holes  113   a ,  113   b  and  117  formed in the waterproof member  101  are larger than those of the holes  123   a ,  123   b  and  127  formed in the protective member  102 . The waterproof and water-permeable films  133   a ,  133   b  and  137  are attached to the through-holes, respectively, so as to prevent the inflow of water. According to exemplary embodiments of the present invention, the waterproof and water-permeable films  133   a ,  133   b  and  137  are adhered to the perimeters of the holes  123   a ,  123   b  and  127  formed through the protective member  102  on the inner surface of the protective member  102  using a waterproof adhesive tape. 
     As a result, it is possible for the portable terminal  200  to input or output sound while securing a waterproof performance in daily use in a state in which the portable terminal  200  is assembled to or otherwise installed in the protective case. 
     The connector holes connected with various connectors, such as, for example, an interface connector and ear jack of the portable terminal  200 , are formed to extend through the waterproof case  100 . The waterproof case  100  illustrated in  FIG. 1  is an example of a construction that is formed with connector holes which correspond to the interface connector and the ear jack of the portable terminal  200 , respectively. 
     According to exemplary embodiments of the present invention, the connector holes are also formed by connecting the holes  115   a  and  115   b  and the holes  125   a  and  125   b , which are formed in the waterproof member  101  and the protective member  102 , respectively, and are configured to be opened or closed by separate sealing members  104   a  and  104   b . For example, in order to form the connector holes, the holes  115   a  and  115   b  formed in the waterproof member  101  are preferably wider than the holes  125   a  and  125   b  formed in the protective member  102 . However, because the connector holes are configured to be opened or closed by the sealing members  104   a  and  104   b , the holes  115   a  and  115   b  and the holes  125   a  and  125   b , which are formed in the protective member  102  to constitute the connector holes, may be formed in the same shape and size. It is apparent that the shapes may be different from each other depending on the connectors of the portable terminal  200  corresponding to the connector holes. 
       FIG. 8  is a cross-sectional view illustrating a sealing member coupled to a waterproof case such as, for example, the waterproof case illustrated in  FIG. 2 , according to an exemplary embodiment of the present invention. 
     Now, the constructions of the sealing members  104   a  and  104   b  will be described in more detail with reference to  FIG. 8 .  FIG. 8  illustrates an example in which the sealing member  104   a  is configured to open or close a connector hole corresponding to an interface connector of the portable terminal  200 . The construction for opening or closing an ear jack side connector hole of the portable terminal  200  may also be configured similar to the construction for opening or closing an interface connector side connector hole of the portable terminal  200 . 
     Referring to  FIG. 8 , the sealing member  104   a  is assembled to the waterproof case  100  to open or close one of the connector holes such as, for example, a connector hole corresponding to the interface connector of the portable terminal  200 . The sealing member  104   a  is preferably formed from an elastic material to be positioned in any direction in the opened state. As a result, in the state in which the connector hole is opened, a route for connecting a connector of an external device or a cable to the connector of the terminal through the connector hole can be sufficiently opened. 
     According to exemplary embodiments of the present invention, the sealing member  104   a  includes a connection part  143  joined to the waterproof case  100 , more specifically to the protective member  102 , and a sealing part  141  configured to open or close the connector hole. For example, the sealing part  141  is configured to make its outer perimeter come into close contact with the inner perimeter of a connector hole, more specifically with the inner perimeter of the hole  125   b  formed in the protective member  102  to seal the connector hole. The connection part  143  extends from the sealing part  141  and is arranged inside of the protective member  102 . In order to join the sealing member  104   a  to the waterproof case  100 , the connection part  143  is formed with a guide hole  145  in the form of an elongated opening extending in a direction, and the protective member  102  is formed with a guide protrusion  149  on the inner surface thereof The connection part  143  is arranged inside of the protective member  102  in the state in which the guide hole  145  accommodates the guide protrusion  149 . As a result, the connection part  143  is introduced into or extracted from the inside of the protective member  102  along the longitudinal direction of the guide hole  145  while being guided by the guide protrusion  149  and the guide hole  145 . In addition, when the sealing member  104   a  opens the connector hole, it is possible to make the sealing part  141  sufficiently open the route for connecting a connector of an external device or a cable to the connector of the terminal through the connector hole. 
     According to exemplary embodiments of the present invention, the waterproof case  100  may further include a holding member  135   b  so that the connection part  143  can be prevented from being released from the guide protrusion  149 . The holding member  135   b  is fixedly attached to the inner surface of the protective member  102 , and is adapted to be partially engaged with the guide protrusion  149 . Therefore, the connection part  143  is restrained by the guide protrusion  149  in the state in which the connection part  134  is interposed between the inner surface of the protective member  102  and the holding member  135   b , and is allowed to move in the longitudinal direction of the guide hole  145 . 
     According to exemplary embodiments of the present invention, the waterproof case  100  may further include a holding member  135   a  so that the sealing member  104   b  can be prevented from being released. As an example, the holding member  135   a  is fixedly attached to the inner surface of the protective member  102 . 
     Preferably, the waterproof case  100  further includes a cover member  147  attached to the sealing member  104   a , more specifically to the outer surface of the sealing part  141 . Because the sealing part  141  is fabricated from an elastic material, such as, for example, rubber, silicone, urethane, or the like, whereas the protective member  102  is fabricated from a synthetic resin, such as, for example, polycarbonate, or the like, it is difficult to harmonize the sealing part  141  and the protective member  102  in terms of texture and color. Therefore, by attaching the cover member  147  formed of a rigid synthetic resin to the outer surface of the sealing part  141 , so that the external appearance of the protective member  102 , and hence the external appearance of the waterproof case  100  is made beautiful even in the state in which the connector hole is closed. In order to make the cover member  147  conceal the sealing part  141  and beautifully decorate the external appearance of the waterproof case  100  when the connector hole is closed, it is preferable to coherently adhere the cover member  147  to the outer surface of the protective member  102 . It is more preferable to form a recess with a predetermined depth around the connector hole on the outer surface of the protective member  102  to accommodate the cover member  147 . 
     In the construction illustrated in  FIG. 8 , the connection part  143  is exemplified as being configured to be arranged inside of the protective member  102  through the connector hole. However, it is also possible to form a separate hole in addition to the connector hole, so that the connection part  143  can be arranged in the inside of the protective member  102 . In such a case, the holding member  135   b  should be configured to seal the separate hole for arranging the connection part  134  on the inner surface of the protective member  102 . In addition, the cover member  147  should conceal the separate hole for arranging the connection part  143  as well as the sealing part  141  on the outer surface of the protective member  102 . 
     When side keys are provided on the portable terminal  200  assembled to or otherwise installed in the waterproof case  100 , the waterproof case  100  may further include key members  111   a  and  111   b  to manipulate the side keys. The key members  111   a  and  111   b  are preferably formed on the waterproof member  101  that is formed of an elastic material. In addition, the protective member  102  may further include key holes  121  for receiving the key members  111   a  and  111   b . The key members  111   a  and  111   b  are arranged to be opposite to the side key members of the portable terminal  200  within the waterproof case  100 , respectively, and are exposed to the outside of the waterproof case  100  through the key holes  121 , respectively. Therefore, the user may manipulate the side keys even in a state in which the portable terminal  200  is assembled to the waterproof case  100 . 
       FIG. 9  is a cross-sectional view illustrating a variant embodiment of a sealing member coupled to a waterproof case such as, for example, the sealing member of  FIG. 1 , according to an exemplary embodiment of the present invention.  FIG. 10  is a perspective view illustrating a sealing member such as, for example, the sealing member of  FIG. 9 , according to an exemplary embodiment of the present invention.  FIG. 11  is a perspective view illustrating a sealing member coupled to a waterproof case such as, for example, the sealing member of  FIG. 9 , according to an exemplary embodiment of the present invention. 
       FIGS. 9 and 10  illustrate a variant of the sealing members  104   a  and  104   b . Hereinafter, the sealing member illustrated in  FIGS. 9 and 10  will be referred to as a “second sealing member.” The second sealing member is indicated by reference numeral “ 105 .” As an example, the second sealing member  105  may be included to form a waterproof structure of a hole for providing a route for extending/retracting a whip antenna even when the portable terminal  200  is assembled to or otherwise installed in the waterproof case  100  in a case in which the whip antenna is provided in the portable terminal  200 , which is configured to be retracted into or extended from the portable terminal  200 . That is, when the portable terminal  200  is equipped with a whip antenna configured to be retracted into or extended from the portable terminal  200 , the waterproof case  100  is formed with a hole for providing a route for retracting or extending the whip antenna. As a result, the user can extend the whip antenna without needing to separate the portable terminal  200  from the waterproof case  100 . At this time, it is possible to implement a waterproof function to the hole for providing the route for retracting or extending the whip antenna by providing the second sealing member  105 . 
     Referring to  FIGS. 9 and 10 , the second sealing member  105  includes a sealing part  151  formed from an elastic material, for example, rubber, silicone and urethane, a sealing protrusion  153   a  and a connection part  155   a  which extend from the inner surface of the sealing part  151 . The sealing protrusion  153   a  and the connection part  155   a  are integrally formed with the sealing part  151 . 
     According to exemplary embodiments of the present invention, the sealing protrusion  153   a  is formed to seal the hole formed in the waterproof case  100  to provide the route for retracting or extending the whip antenna, and is fit in the hole in such a manner that the outer circumferential surface thereof comes into close contact with the inner circumferential surface of the hole. According to exemplary embodiments of the present invention, as illustrated in  FIGS. 10 and 11 , the sealing protrusion  153   a  is formed with a first joint knob  153   b  on the outer circumferential thereof to be joined to the waterproof case  100 , more specifically to the inner surface of the protective member  102 . While the sealing protrusion  153   a  is being introduced into the hole, the first joint knob  135   b  is slidably contacted with the inner circumferential surface of the hole, and when the sealing protrusion  153   a  is fully introduced into the waterproof case  100 , the first joint knob  153   b  is joined to the inner surface of the waterproof case  100  due to the elastic restoring force of the sealing protrusion  153   a.    
     The connection part  155   a  is to connect the sealing part  151  to the waterproof member  101 . The connection part  155   a  is formed in a rod shape extending from the inner surface of the sealing part  151 , and has a circular cross-section. Therefore, the sealing part  151  may be rotated about an axis extending in the longitudinal direction of the connection part  155   a . That is, the sealing part  151  can be rotated about the connection part  155   a  in the state in which the hole for providing the route for retracting or extending the whip antenna is opened. As a result, in the state in which the hole is opened, the sealing part  151  may be positioned at a location where it is not interfered with the whip antenna while the whip antenna is being retracted or extended. 
     The connection part  155   a  is installed in such a manner that its end is positioned inside of the waterproof case  100  through a coupling hole formed in the waterproof case  100 . For example, the second sealing member  151  is connected to the waterproof case  100  through the connection part  155   a . The connection part  155   a  may be provided with a second joint knob  155   b  and a stopper  155   c . The stopper  155   c  is provided at the end of the connection part  155   a  so as to prevent the sealing part  151  from being completely separated from the waterproof case  100  at a position where the sealing part  151  is released from the waterproof case  100 , in other words in a state in which the hole is opened. As illustrated in  FIG. 9 , the second joint knob  155   b  is joined to the inner surface of the waterproof case  100  in a state in which the sealing part  151  is in close contact with the waterproof case  100 . According to exemplary embodiments of the present invention, the outer circumferential surface of the connection part  155   a  is completely engaged with the coupling hole of the waterproof case  100 , and is somewhat pressed within the coupling hole of the waterproof case  100  between the inner surface of the sealing part  151  and the second joint knob  155   b . For example, between the inner surface of the sealing part  151  and the second joint knob  155   b , the cross-sectional diameter of the connection part  155   a  is larger than that of the coupling hole of the waterproof case  100 . Therefore, it is possible to implement a waterproof function in the coupling hole of the waterproof case  100  in the state in which the second sealing member  105  is in close contact with the waterproof case  100 . However, between the second joint knob  155   b  and the stopper  155   c , the cross-sectional diameter of the connection part  155   a  is preferably smaller than that of the coupling hole of the waterproof case  100 . This is to allow the user to freely control the position of the second sealing member  105  in the state in which the hole for retracting or extending the whip antenna. 
     According to exemplary embodiments of the present invention, if the outer surface of the waterproof case  100  is formed from a synthetic resin, the second sealing member  105  may be provided with a second cover member  157  formed from a rigid synthetic resin such as, for example, polycarbonate, so as to harmonize the outer appearance of the second sealing member  105  with the outer appearance of the waterproof case  100 . 
     As discussed in the above, the waterproof case for a portable terminal according to exemplary embodiments of the present invention has an external appearance of an ordinary protective case while providing a waterproof function in daily use. As a result, the user can enjoy a screen without deteriorating picture quality even in the state in which the portable terminal is assembled to the protective case, and can freely manipulate a touch screen or side keys. In addition, by using sealing members, the waterproof case for a portable terminal according to exemplary embodiments of the present invention is adapted to freely open or close connector holes to allow a connector of the portable terminal to be connected to an external device while providing a waterproof function in daily life. 
     The waterproof case for a portable terminal according to exemplary embodiments of the present invention configured as described above has an advantage in that it can provide a waterproof function in daily life although it has an external appearance of a protective case for providing an ornamental function or a protective function against physical impact. In addition, the waterproof case is advantageous in that because the waterproof case allows the display device of the portable terminal to be opened while providing a waterproof function in daily life, it is possible to prevent the deterioration of picture quality of the display device, and to sufficiently use the touch screen function. Furthermore, because it is easy to provide a cover member for protecting various connectors, such as an interface connector and an earphone jack, an external device can be easily connected to the portable terminal even in the state in which the terminal is assembled to the waterproof case. Moreover, because the inventive waterproof case is formed with through-holes which correspond to sound input/output holes of the portable terminal, such as a microphone hole and a speaker phone hole, and waterproof and water-permeable films are attached to the through-holes, the inventive waterproof case can provide a waterproof function in daily life while enabling the inputting and outputting of sound. Consequently, the waterproof case for a portable terminal according to exemplary embodiments of the present invention can provide a waterproof function in daily life as well as normal ornamental and protective functions. In other words, the waterproof case may provide protection against scratches or other impact forces, an ornamental function, and protection against water (or other liquids) encountered in daily life. 
     As a non-exhaustive illustration only, a portable terminal described herein may refer to mobile devices such as a cellular phone, a Personal Digital Assistant (PDA), a digital camera, a portable game console, and an MP3 player, a Portable/Personal Multimedia Player (PMP), a handheld e-book, a portable lap-top PC, a Global Positioning System (GPS) navigation, and the like. 
     While the invention has been shown and described with reference to certain exemplary 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 and their equivalents.