Abstract:
The present invention has an object of providing an electronic apparatus storing container capable of facilitating mounting of an electronic apparatus and having improved productivity. The electronic apparatus storing container according to the present invention includes: a base including an electronic apparatus mounting area of a planar shape in which an electronic apparatus is mountable, and a packing groove formed in an outer peripheral portion of the electronic apparatus mounting area; a waterproof packing fit in a corresponding manner in the packing groove; and a case joined with the base with the waterproof packing sandwiched therebetween, the case storing the electronic apparatus mounted in the electronic apparatus mounting area. This improves the productivity of the electronic apparatus storing container.

Description:
TECHNICAL FIELD 
     The present invention relates to an electronic apparatus storing container with improved assemblability, and to a method for assembling the same. 
     BACKGROUND ART 
     In a cellular phone system, base station apparatuses are installed outdoors in each area of a predetermined size and radio communications are performed. Along with an increase in the number of subscribers, the number of base station apparatuses to be installed is expected to increase. Therefore, there is a demand for improvement in productivity and reduction in size and weight of the apparatuses. 
     For example, a base station unit for a cellular phone disclosed in Patent Literature 1 has a structure in which a plurality of casing pieces are joined together and a plurality of shield packings intervene at each joint between the casing pieces, thereby forming a base station apparatus for a cellular phone. 
     Patent Literature 2 discloses a base plate having a groove for forming an O-ring at the periphery thereof. 
     Patent Literature 3 discloses an electronic apparatus storing container in which an electronic apparatus is installed at the center of a flat substrate and is covered with the container surrounded by a wire gauge. 
     Patent Literature 4 discloses an electronic apparatus storing container having a full-face-type cover which is formed in a box shape by welding a plate. 
     Patent Literature 5 discloses a base station apparatus which includes a cover and a groove formed along an edge of an opening, and in which a packing is formed in the groove. 
     CITATION LIST 
     Patent Literature 
     
         
         [Patent Literature 1] Japanese Unexamined Patent Application Publication No. 10-022900 
         [Patent Literature 2] Japanese Examined Utility Model Application Publication No. 06-000459 
         [Patent Literature 3] Japanese Unexamined Utility Model Application Publication No. 02-118980 
         [Patent Literature 4] Japanese Unexamined Patent Application Publication No. 2006-032581 
         [Patent Literature 5] Japanese Unexamined Patent Application Publication No. 11-121941 
       
    
     SUMMARY OF INVENTION 
     Technical Problem 
     However, in the base station apparatus disclosed in Patent Literature 1, a plurality of casing pieces are joined together and a plurality of shield packings intervene at each joint between the casing pieces, thereby forming a base station unit for a cellular phone. Thus, it takes a long time to assemble the apparatus, leading to deterioration in productivity. 
     Additionally, since the plurality of casing pieces are joined together and a radiator fin is mounted on each casing, resulting in an increase in the occupied volume of the apparatus. 
     Moreover, in the technique disclosed in Patent Literature 2, a sealing surface is disposed at a higher position than an electronic apparatus installation part, and a substrate has a container shape (concave shape). This makes it difficult to mount a circuit module, such as a circuit substrate, upon downsizing, for example. 
     The present invention has been made in view of the above-mentioned problems and has an object of providing an electronic apparatus storing container with improved productivity. 
     Solution to Problem 
     In order to solve the above-mentioned problems, an electronic apparatus storing container according to the present invention includes: a base including an electronic apparatus mounting area of a planar shape in which an electronic apparatus is mountable, and a packing groove formed in an outer peripheral portion of the electronic apparatus mounting area; a waterproof packing fit in a corresponding manner in the packing groove; and a case joined with the base with the waterproof packing sandwiched therebetween, the case storing the electronic apparatus mounted in the electronic apparatus mounting area. 
     A method for assembling an electronic apparatus storing container according to the present invention includes: screwing an electronic apparatus into an electronic apparatus mounting area of a planar shape; fitting a waterproof packing in a packing groove in a corresponding ma, the packing groove being formed in an outer peripheral portion of the electronic apparatus mounting area; and screwing a case and a base with the waterproof packing sandwiched therebetween, the case storing the electronic apparatus. 
     Advantageous Effects of Invention 
     According to the present invention, a packing groove is formed in the outer periphery of a planar base plate, thereby facilitating mounting of an electronic apparatus, improving the productivity, and achieving downsizing. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a perspective view showing an external appearance of a base station apparatus according to an exemplary embodiment; 
         FIG. 2  is a side view showing an external appearance of the base station apparatus according to an exemplary embodiment; 
         FIG. 3  is a bottom view showing an external appearance of the base station apparatus according to an exemplary embodiment; 
         FIG. 4  is an exploded perspective view of the base station apparatus according to an exemplary embodiment; and 
         FIG. 5  is a view showing a state where a maintenance door of the base station apparatus according to an exemplary embodiment is opened. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     An exemplary embodiment of the present invention will now be described in detail with reference to the drawings. 
       FIG. 1  is a perspective view showing an external appearance of a base station apparatus according to an exemplary embodiment of the present invention.  FIG. 2  is a side view of the apparatus.  FIG. 3  is a bottom view of the apparatus.  FIG. 4  is an exploded perspective view of the apparatus.  FIG. 5  is a view showing a state where a maintenance door of the apparatus is opened. 
     As shown in  FIGS. 1 and 2 , the base station apparatus includes a base plate  1 , a fitting  7 , a case  11 , and a maintenance door  21 . 
     A shown in  FIG. 3 , connectors  12  for connecting with an antenna (not shown) and for supplying power are provided on the bottom surface of the case  11 . 
     A base plate  1  includes radiator fins  3  which are formed on the side of the fitting  7 , and a base plane  2  which is formed on the opposite surface side and has a planar shape. The base plane  2  is an area for mounting an electronic circuit unit  6  functioning as a base station. Further, at the outer periphery of the base plane  2  of a planar shape, a packing groove  4  is formed in which a waterproof packing  5  is embedded. The base has a planar shape and the packing groove is formed in the outer periphery thereof. This structure makes it possible to smoothly mount the electronic circuit unit upon downsizing of the apparatus. 
     When the waterproof packing  5  is inserted into the packing groove  4 , the waterproof packing  5  has an annular shape with a size slightly larger than the base plane  2 . When the case  11  is screwed into the base plate  1 , protruding portions are crushed, thereby maintaining the waterproof property of each of the base plate  1  and the case  11 . 
     In the electronic circuit unit  6  which is directly screwed into the base plane  2  of the base plate  1 , heat generated inside is transferred to the base plate  1  and is effectively radiated from the radiator fins  3  which are provided on the opposite surface side of the base plate  2 . 
     The case  11  has a size capable of storing the electronic circuit unit  6 . The case  11  is joined by being screwed into the base plate  1  with the waterproof packing  5  sandwiched therebetween. Accordingly, the base station apparatus has a waterproof function to prevent water from entering the inside of the apparatus from a gap between joint surfaces of the base plate  1  and the case  11 . Note that it is preferable that the case  11  be integrally formed by plate welding so as to protect the electronic circuit unit and prevent water from entering from the case  11 . 
     Furthermore, a convex portion of the case  11  includes the maintenance door  21  and a maintenance window  13  for adjusting the electronic circuit unit  6  and checking the operating state, and a hinge  15  for mounting the maintenance door  21  is provided. A maintenance plate  14  is screwed into the maintenance window  13 . 
     As specifically shown in  FIG. 5 , the maintenance door  21  is integrally formed by plate welding, and can be opened/closed through the hinge  15  mounted to the case  11 . Normally, the maintenance door  21  is fixed to the case  11  by two screws for door  24 . During adjustment or maintenance of the apparatus, the screws for door  24  are loosened to open the maintenance door  21 . Note that the screws for door  24  are structured so as not to be dismounted from the maintenance door  21 , thereby preventing the screws from being lost. 
     An upper portion of the maintenance door  21  includes a rod-like primary packing for door  22  for preventing water or the like dropping from the case  11  from entering, and an annular secondary packing for door  23  for preventing water or the like from entering the maintenance window  13 . Further, a breathing hole  25  is provided so as to prevent a difference from occurring between the pressure within the apparatus and the outside atmospheric pressure. The breathing hole is provided with a micro-porous cap  26 , such as Gore-Tex®, which has air permeability but is not permeable to water. 
     The fitting  7  for mounting the apparatus outdoors has mounting holes  8  and is fixed to the base plate  1  by screws. 
     Next, a procedure for assembling the base station apparatus will be described in detail. When the assembly is carried out in accordance with this procedure, the base station apparatus with improved productivity (the assemblability of the apparatus is improved) and having a small occupied volume is obtained. Note that the electronic circuit unit  6  is assembled in a separate process and prepared as a finished product. 
     In assembly of the maintenance door  21 , the primary packing for door  22  and the secondary packing for door  23  are fixed to the inside of the maintenance door  21  with an adhesive. Further, the two door fixing screws  24  are mounted in the maintenance door  21 . After that, the maintenance door  21  is fixed by screws to the hinge  15  which is mounted to the case  11 . 
     In assembly of the case  11 , the connectors  12  for connecting with an antenna (not shown) and supplying power are mounted to a lower surface of the case  11 . Note that the connectors  12  have a waterproof structure, which prevents water from entering from the lower surface of the case  11 . 
     The connectors  12  are each attached with a wire for connecting with the electronic circuit unit  6  and a connection connector (not shown). Thus, there is a possibility that the wire and the connection connector are sandwiched when the case  11  is screwed into the base plate  1 . To prevent this, the leading ends of the wire and the connection connector are drawn out of the maintenance window  13  in the state where the maintenance plate  14  is dismounted. Further, the hinge  15  is fixed by screws, and then the maintenance door  21  is mounted to the hinge  15 . 
     Thus, preparation of each unit is finished, and then the apparatus main body is assembled. Note that when the apparatus is installed outdoors, the apparatus is installed vertically as shown in  FIG. 1 . Meanwhile, during assembly, the apparatus can be installed horizontally as shown in  FIG. 4  so that the screwing operation can be performed from one direction, thereby facilitating the assembly work. 
     First, the base plate  1  is placed on the fitting  7 . Next, the electronic circuit unit  6  is screwed into the base plane  2 . Then, the waterproof packing  5  is inserted into the packing groove  4  of the base plate  1 . The case  11  is placed on the base plate  1 , and then the case  11 , the base plate  1 , and the fitting  7  are fixed by screws. The connection connector drawn out of the maintenance window  13  is connected to the electronic circuit unit  6 , and then the maintenance plate  14  is fixed by screws. After that, the maintenance door  21  is closed and fixe by the two screws for door  24 . 
     The present invention has been described above with reference to exemplary embodiments. The present invention has been described by way of specific examples, but these specific examples can be modified or changed in various manners without departing from the wide spirit and scope of the present invention as defined in the claims. 
     This application is the National Phase of PCT/JP2009/005387, filed Oct. 15, 2009, which is based upon and claims the benefit of priority from Japanese patent application No. 2008-321953, filed on Dec. 18, 2008, the disclosure of which is incorporated herein in its entirety by reference. 
     REFERENCE SIGNS LIST 
     
         
           1  BASE PLATE 
           2  BASE PLANE 
           3  RADIATOR FIN 
           4  PACKING GROOVE 
           5  WATERPROOF PACKING 
           6  ELECTRONIC CIRCUIT UNIT 
           7  FITTING 
           8  MOUNTING HOLE 
           11  CASE 
           12  CONNECTOR 
           13  MAINTENANCE WINDOW 
           14  MAINTENANCE PLATE 
           15  HINGE 
           21  MAINTENANCE DOOR 
           22  PRIMARY PACKING FOR DOOR 
           23  SECONDARY PACKING FOR DOOR 
           24  SCREW FOR DOOR 
           25  BREATHING HOLE 
           26  MICROPOROUS CAP 
           27  BREATHING HOLE COVER