Patent Publication Number: US-8982571-B2

Title: Electronic equipment with electric wiring

Description:
BACKGROUND OF THE INVENTION 
     1. Field of the Invention 
     The present application relates to electronic equipment with electric wiring. 
     2. Description of Related Art 
     In recent years, mobile devices such as a notebook computer with enhanced waterproof, dripproof, and dustproof performance have made their debut on the assumption that they are used outdoors. Of those mobile devices, a mobile device with a plurality of housings such as a notebook computer or a foldable mobile telephone is required to have a configuration in which electric components housed respectively in the plurality of housings are connected to each other electrically. In the case of a notebook computer, for example, it is necessary that a liquid crystal display housed in one housing be connected electrically to an electric circuit board housed in the other housing. For such electric connection between the electric components, leads, flat lead cables, etc. are used frequently. In the case of connecting the electric components to each other via leads and the like, it is necessary to provide holes respectively in the plurality of housings so as to extract the leads therethrough, which degrades waterproof performance, etc. 
     JP 2004-319267 A discloses a configuration in which pressure blades pass through insulating coating portions arranged in a plane direction of a flat electric wire to fix the flat electric wire, and a waterproof member is crimped onto the flat electric wire from above and below the flat electric wire. 
     As disclosed by JP 2004-319267 A, with a configuration in which the flat electric wire is placed on the waterproof member, intervals between a plurality of electric wires constituting the flat electric wire become non-uniform in most cases, and the waterproof member is not placed between the electric wires precisely in a portion where the interval between the electric wires is small, which makes the waterproofness insufficient. In such a configuration, a waterproof gasket is not placed precisely between conductive cables in a portion where the interval between the conductive cables is extremely small, which makes the waterproofness insufficient. 
     SUMMARY 
     Electronic equipment of the present application includes: an electric component; a conductive cable electrically connected to the electric component; and a cable holding member having a pair of holding portions capable of holding the conductive cable. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective view of a notebook computer in Embodiment 1. 
         FIG. 2  is a plan view of a first housing. 
         FIG. 3  is a plan view of a water cutoff portion. 
         FIG. 4  is a cross-sectional view taken along a Y 1 -Y 1  portion of  FIG. 3 . 
         FIG. 5  is a cross-sectional view taken along a Y 2 -Y 2  portion of  FIG. 3 . 
         FIG. 6  is a cross-sectional view taken along a Z-Z portion of  FIG. 3 . 
         FIG. 7  is a perspective view illustrating a non-use state of a notebook computer as an example of electronic equipment in Embodiment 2. 
         FIG. 8  is a perspective view illustrating a use state of the notebook computer. 
         FIG. 9  is a perspective view of the notebook computer, seen from a reverse surface in the state of  FIG. 7 . 
         FIG. 10  is a plan view schematically illustrating an internal structure of the notebook computer in a state of  FIG. 9 . 
         FIG. 11  is a plan view illustrating, in an enlarged state, a wiring portion with respect to communication modules of the notebook computer illustrated in  FIG. 10 . 
         FIG. 12  is a perspective view of a cable holder for wiring illustrated in  FIG. 11 . 
         FIG. 13  is a plan view of another embodiment of the wiring illustrated in  FIG. 11 . 
         FIG. 14  is a perspective view of a configuration disclosed by JP 2004-319267 A. 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     Embodiment 1 
     [1. Configuration of Electronic Equipment] 
       FIG. 1  is a perspective view illustrating an outer appearance of a notebook computer as an example of electronic equipment according to Embodiment 1. In the present embodiment, although a notebook computer is exemplified as the electronic equipment, any equipment may be used as long as it includes a plurality of housings and has a configuration in which electric components housed in the respective housings are connected to each other electrically. Further, although the notebook computer illustrated in  FIG. 1  has a handle that can be held by a user&#39;s hand, the handle can be omitted. 
     As illustrated in  FIG. 1 , the notebook computer includes a first housing  1  and a second housing  2 . The first housing  1  contains a circuit board on which various electric elements are mounted, a hard disk drive, and the like. The second housing  2  includes a display panel  4 . The display panel  4  is, for example, a liquid crystal display. The first housing  1  and the second housing  2  are supported with respect to each other rotatably by hinge portions  3 . The hinge portions  3  have shafts supporting the first housing  1  and the second housing  2  rotatably in a direction of an arrow A or B. A keyboard  5  and a pointing device  6  are placed on an upper surface  1   a  of the first housing  1 . The second housing  2  includes a first communication portion  21  and a second communication portion  22 . 
     The first communication portion  21  and the second communication portion  22  are capable of transmitting an electromagnetic wave outside and receiving an electromagnetic wave transmitted from outside. The first communication portion  21  includes, for example, an antenna corresponding to a wireless Local Area Network (LAN), a transmitting circuit, and a receiving circuit. The second communication portion  22  includes, for example, an antenna corresponding to a Wide Area Network (WAN), a transmitting circuit, and a receiving circuit. One end of a first conductive cable  13   a  is connected electrically to the first communication portion  21 . The first conductive cable  13   a  is placed in the second housing  2 , the hinge portion  3 , and the first housing  1 . The other end of the first conductive cable  13   a  is connected electrically to an electric circuit board (not shown) housed in the first housing  1 . One end of a third conductive cable  13   c  is connected electrically to the second communication portion  22 . The third conductive cable  13   c  is placed in the second housing  2 , the hinge portion  3 , and the first housing  1 . The other end of the third conductive cable  13   c  is connected electrically to the electric circuit board housed in the first housing  1 . The type of an electromagnetic wave which the first communication portion  21  and the second communication portion  22  illustrated in  FIG. 1  are capable of transmitting/receiving, and the set positions thereof are merely examples. Further, in  FIG. 1 , the first conductive cable  13   a  and the third conductive cable  13   c  are illustrated schematically. 
       FIG. 2  is a plan view of the upper surface  1   a  of the first housing  1 . As illustrated in  FIG. 2 , the first conductive cable  13   a  and the third conductive cable  13   c  are connected to the electric circuit board via a water cutoff area W in the first housing  1 . The water cutoff area W is provided with a water cutoff portion. Although  FIG. 2  illustrates only the first conductive cable  13   a  and the third conductive cable  13   c , actually, other conductive cables also are provided. 
     An inner space of the first housing  1  is separated mainly into two spaces. One space of the first housing  1  contains components having conductivity such as the electric circuit board. Further, the first housing  1  includes a hole  1   b  for extracting the first conductive cable  13   a  and the like from the first housing  1  and a hole  1   b  for extracting the third conductive cable  13   c  and the like from the first housing  1  in the vicinity of the hinge portions  3 . Thus, liquid, dust, and the like may enter the first housing  1  through the holes  1   b  and  1   c . The holes  1   b  and  1   c  are connected spatially to the other space of the two spaces in the first housing  1 . The other space of the first housing  1  and one space of the first housing  1  are connected spatially to each other with the water cutoff area W (water cutoff portion) interposed therebetween. Thus, although liquid and the like having entered the first housing  1  through the holes  1   b  and  1   c  in the housing  1  enter the other space, the liquid and the like do not enter the one space due to the water cutoff portion. 
     [2. Water Cutoff Structure of Water Cutoff area W] 
       FIG. 3  is a plan view of the water cutoff area W (water cutoff portion) provided in the first housing  1 .  FIG. 4  is a cross-sectional view taken along a Y 1 -Y 1  portion of  FIG. 3 .  FIG. 5  is a cross-sectional view taken along a Y 2 -Y 2  portion of  FIG. 3 .  FIG. 6  is a cross-sectional view taken along a Z-Z portion of  FIG. 3 . 
     The water cutoff area W includes a cable holder  11 , a first water cutoff member  12 , a covering  15 , and a second water cutoff member  16 . As illustrated in  FIG. 4 , etc., the first water cutoff member  12  adheres to a frame  14  with an adhesive or the like having waterproofness. The frame  14  is provided integrally in the first housing  1 . The frame  14  is placed between a first space  17  and a second space  18  inside the first housing  1 . In the first space  17 , an electric circuit board and the like are placed. The second space  18  is communicating with an outer space. 
     The cable holder  11  is capable of holding conductive cables  13   a  to  13   e . The cable holder  11  adheres to a principal plane of the frame  14  with an adhesive or the like having waterproofness. It is preferred that the cable holder  11  may be provided integrally on the frame  14 , since this configuration can enhance waterproofness. The cable holder  11  has a hole  11   h  at a position substantially matched with a hole  14   a  formed in the frame  14 . The cable holder  11  preferably is formed of a flexible material. It is preferred that the cable holder  11  is formed of, for example, soft resin capable of being deformed elastically. As the soft resin capable of being deformed elastically, for example, polybutylene terphthalate resin, nitrile rubber, or silicone rubber can be used. The cable holder  11  has a first holder portion  11   a , a second holder portion  11   b , a third holder portion  11   c , and a fourth holder portion  11   d.    
     The first holder portion  11   a  and the second holder portion  11   b  are opposed to each other with a gap accommodating a part of the first water cutoff member  12  interposed therebetween. The third holder portion  11   c  and the fourth holder portion  11   d  are opposed to each other with a gap accommodating a part of the first water cutoff member  12  interposed therebetween. The second holder portion  11   b  and the third holder portion  11   c  are opposed to each other with the hole  11   h  interposed therebetween. The holder portions  11   a  to  11   d  respectively have slit-shaped holding portions for holding conductive cables, and for the purpose of clarity, only the holding portions provided at the first and second holder portions  11   a  and  11   b  are denoted with reference numerals. The first holder portion  11   a  has holding portions  11   e ,  11   f , and  11   g . The second holder portion  11   b  has holding portions  11   k ,  11   m , and  11   n . The holding portions  11   e  and  11   k  are provided at positions opposed to each other. The holding portions  11   f  and  11   m  are provided at positions opposed to each other. The holding portions  11   g  and  11   n  are provided at positions opposed to each other. The pitch between the holding portions  11   e  and  11   f , and the pitch between the holding portions  11   k  and  11   m  have the same size P 11 . The pitch between the holding portions  11   f  and  11   g , and the pitch between the holding portions  11   m  and  11   n  have the same size. The third holder portion  11   c  and the fourth holder portion  11   d  have holding portions similar to the holding portions  11   e  to  11   n . Further, the size relationship of the holding portions provided respectively in the third holder portion  11   c  and the fourth holder portion  11   d  is similar to that of the holding portions  11   e  to  11   n.    
     The first water cutoff member  12  has a rectangular solid shape. As illustrated in  FIG. 3 , a hole  12   d  is formed so as to pass through the first water cutoff member  12 . The inner diameter of the hole  12   d  is at least larger than the sum of outer diameters of the conductive cables  13   a  to  13   e . The first water cutoff member  12  is formed of a material having elasticity and being capable of ensuring waterproofness. The first water cutoff member  12  can be formed of, for example, a silicone foam. The first water cutoff member  12  may adhere to the frame  14  with an adhesive tape or the like, and it is preferred that the first water cutoff member  12  adheres to the frame  14  with an adhesion system having waterproofness at least for preventing liquid from entering from between the first water cutoff member  12  and the frame  14 . In the first water cutoff member  12 , slits  12   a ,  12   b , and  12   c  are formed at a predetermined gap P 11  (see  FIG. 4 ). Although reference numerals are not denoted, slits also are formed at positions where the conductive cables  13   c  to  13   e  are placed in a portion between the third holder portion  11   c  and the fourth holder portion  11   d  in the first water cutoff member  12 . The first water cutoff member  12  has elasticity, and hence, allows the conductive cables  13   a  to  13   e  to be press-fitted in the slits  12   a  to  12   c , etc. while being deformed elastically. The slit  12   a  is formed on a line segment connecting the holding portion  11   e  to the holding portion  11   k . The slit  12   b  is formed on a line segment connecting the holding portion  11   f  to the holding portion  11   m . The slit  12   c  is formed on a line segment connecting the holding portion  11   g  to the holding portion  11   n.    
     As illustrated in  FIG. 6 , the covering  15  can close an upper region of the cable holder  11 . The second water cutoff member  16  is sandwiched between the cable holder  11  and the covering  15 , and between the first water cutoff member  12  and the covering  15 . The second water cutoff member  16  may be provided at least so as to abut on a portion positioned on the periphery of the hole  12   d  of the first water cutoff member  12 . The second water cutoff member  16  is formed of a material having elasticity and being capable of ensuring waterproofness. The second water cutoff member  16  can be formed of, for example, a silicone foam. It is preferred that the second water cutoff member  16  adheres to the covering  15  with an adhesive tape or the like so that the second water cutoff member  16  becomes unlikely to be shifted from the covering  15 . 
     As illustrated in  FIG. 1 , the first conductive cable  13   a  has one end connected to the first communication portion  21  and the other end connected to the electric circuit board housed in the first space  17  in the first housing  1 . As illustrated in  FIG. 1 , the third conductive cable  13   c  has one end connected to the second communication portion  22  and the other end connected to the electric circuit board housed in the first space  17  in the first housing  17 . Although not shown, the second conductive cable  13   b , the fourth conductive cable  13   d , and the fifth conductive cable  13   e  also have the one ends connected to electric components in the communication portion and the like and the other ends connected to the electric circuit board housed in the first space  17  in the first housing  1 . The conductive cables  13   a  to  13   e  are wired so as to pass through the second space  18 , the hole  14   a , and the first space  17 . 
     When the water cutoff portion of the present embodiment is allowed to have the conductive cables, first, as illustrated in  FIGS. 3 and 5 , the holding portions  11   e  and  11   k  are allowed to hold the first conductive cable  13   a , and the holding portions  11   f  and  11   m  are allowed to hold the conductive cable  13   b . An interval P 1  between the first holder portion  11   a  and the second holder portion  11   b  is set in such a manner that a region of the first conductive cable  13   a  between portions held by the holding portion  11   e  and the holding portion  11   k , and a region of the second conductive cable  13   b  between portions held by the holding portion  11   f  and the holding portion  11   m  are unlikely to become loose. 
     Next, as illustrated in  FIG. 4 , the region of the first conductive cable  13   a  between the portions held by the holding portion  11   e  and the holding portion  11   k  is buried in the slit  12   a  of the first water cutoff member  12 . Further, the region of the second conductive cable  13   b  between the portions held by the holding portion  11   f  and the holding portion  11   m  is buried in the slit  12   b  of the first water cutoff member  12 . 
     Since the holding portion  11   e , the slit  12   a , and the holding portion  11   k  are placed on the same line, the first conductive cable  13   a  is suspended linearly between the holding portion  11   e  and the holding portion  11   k . Since the holding portion  11   f , the slit  12   b , and the holding portion  11   m  also are placed on the same line, the second conductive cable  13   b  is suspended linearly between the holding portion  11   f  and the holding portion  11   m.    
     Further, the pitch between the holding portion  11   e  and the holding portion  11   f , and the pitch between the holding portion  11   k  and the holding portion  11   m  have the size P 11 . Therefore, the first conductive cable  13   a  and the second conductive cable  13   b  are held by the first holder portion  11   a  and the second holder portion  11   b  so as to be parallel to each other with the gap having the size P 11  interposed therebetween. 
     Further, by allowing the first holder portion  11   a  and the second holder portion  11   b  to hold the first conductive cable  13   a  and the second conductive cable  13   b , and burying the first conductive cable  13   a  and the second conductive cable  13   b  in the first water cutoff member  12 , the first water cutoff member  12  can be placed between the first conductive cable  13   a  and the second conductive cable  13   b.    
     Although detailed descriptions are omitted, the third conductive cable  13   c , the fourth conductive cable  13   d , and the fifth conductive cable  13   e  also can be held by the third holder portion  11   c  and the fourth holder portion  11   d  in the same procedure as that of the above. 
     Next, as illustrated in  FIG. 6 , the second water cutoff member  16  is placed on the cable holder  11  and the first water cutoff member  12 . At this time, the second water cutoff member  16  is placed so as to abut on at least the periphery of the hole  12   d  of the first water cutoff member  12 . 
     Next, the covering  15  is placed on the second water cutoff member  16 , and the covering  15  is fixed to the cable holder  11 . The covering  15  may be fixed to the cable holder  11  by screwing or hook engagement. Further, when the covering  15  is fixed to the cable holder  11 , the water cutoff is enhanced with reliability by pressing the first water cutoff member  12  and/or the second water cutoff member  16  with the covering  15  and the cable holder  11 . 
     As described above, the water cutoff can be performed in a portion where the first water cutoff member  12  and the second water cutoff member  16  abut on each other, and liquid, dust, and the like entering from outside through the second space  18  can be prevented from entering the first space  17 , in which the electric circuit board and the like are placed, through the hole  14   a.    
     [3. Effects of Embodiment, etc.] 
     According to the present embodiment, due to the configuration in which the first water cutoff member  12  is placed on the periphery of the hole  14   a  communicating with the first space  17  from outside, and the hole  12   d  of the first water cutoff member  12  is closed with the second water cutoff member  16 , liquid, dust, and the like, which enters from outside, can be prevented from entering the first space  17 . This can prevent the electric components and the like placed in the first space  17  from being short-circuited electrically to be damaged. 
     Further, according to the present embodiment, a plurality of conductive cables to be suspended by the first holder portion  11   a  and the second holder portion  11   b  can be suspended so that they are parallel to each other. Therefore, the intervals between the plurality of conductive cables positioned between the first holder portion  11   a  and the second holder portion  11   b  become uniform. Further, the plurality of conductive cables to be suspended by the third holder portion  11   c  and the fourth holder portion  11   d  can be suspended so that they are parallel to each other. Therefore, the intervals of the plurality of conductive cables positioned between the third holder portion  11   c  and the fourth holder portion  11   d  become uniform. Accordingly, the first water cutoff member  12  can be interposed between the plurality of cables without fail, which can prevent liquid, dust, and the like, entering from outside, from entering the first space  17 . 
     Further, according to the present embodiment, the first water cutoff member  12  is provided with the slits  12   a  to  12   c  in which the conductive cables can be buried, and hence, the plurality of conductive cables to be suspended by the first holder portion  11   a  and the second holder portion  11   b  can be positioned. Thus, the first water cutoff member  12  can be interposed between the plurality of conductive cables without fail, which can prevent liquid, dust, and the like, entering from outside, from entering the first space  17 . 
     In the present embodiment, although the first water cutoff member  12  and the second water cutoff member  16  are formed of a silicone foam, any material can be used as long as it has elasticity and is capable of preventing the entrance of liquid. 
     Further, it is preferred that the first water cutoff member  12  and the second water cutoff member  16  are formed of an integrated material so as to ensure water cutoff properties or waterproofness. 
     Further, the first water cutoff member  12  and the second water cutoff member  16  may be formed of silicone rubber, nitrile rubber, or the like so as to have elasticity. 
     Further, in the present embodiment, the first water cutoff member  12  and the second water cutoff member  16  are not limited to the constituent element names related to the function capable of preventing the entrance of water. More specifically, the water cutoff member of the present embodiment also includes the function capable of preventing various liquids or solids other than water from entering the first space  17 , irrespective of the name “water cutoff member”. This means that the water cutoff member should have waterproofness and dustproofness. Thus, the water cutoff member of the present embodiment can prevent liquid, foreign matter, and the like from entering the first housing  1 , and prevent, for example, the electric components from causing an electric short-circuit. 
     Further, in the present embodiment, although the water cutoff portion is provided in the first housing  1 , the water cutoff portion also may be provided in the second housing  2 . 
     Further, the first housing  1  in the present embodiment is an example of a housing. The conductive cables  13   a  to  13   e  in the present embodiment are examples of conductive cables. The hole  14   a  in the present embodiment is an example of a hole. The first water cutoff member  12  in the present embodiment is an example of a water cutoff member. 
     Embodiment 2 
     In electronic equipment, a plurality of kinds of electronic function modules having various functions are contained. The electronic function modules are connected to each other and to other electronic elements so as to exhibit desired functions. Relay cables used for connection in such electronic equipment need to be formed compactly while performing connection precisely. 
     For example, JP 2004-319267 A discloses a structure of a connector  120  as illustrated in  FIG. 14 . An end of a flat electric wire  123 , in which a plurality of electric wires  122  is arranged via flat insulating coating portions  121 , is connected to the connector  120 . The connector  120  includes a housing  124 , pressure blades  125  provided at pressure terminals (not shown), and a cover  126 . The pressure blades  125  protrude from a back portion  124   a  of the housing  124  to be connected to the electric wires  122 . The cover  126  covers the back portion  124   a  to sandwich the end of the flat electric wire  123  between the cover  126  and the housing  124 , and thus, the end of the flat wire  123  is fixed. A waterproof member  127  in an elastic sheet shape is inserted between the back portion  124   a  and the cover  126 . At the end of the flat electric wire  123 , through-holes, with which protrusions  128  protruding from the back portion  124   a  of the housing  124  are engaged, are formed, and through-holes  129 , with which the pressure blades  125  are engaged, are formed. 
     For connecting the end of the flat electric wire  123  to the connector  120 , first, the waterproof member  127  is placed across the cover  126  and the back portion  124   a  of the housing  124  while the cover  126  is opened as illustrated in  FIG. 8 . Then, the waterproof member  127  is pressed so that the protrusions  128  and the pressure blades  125  protrude through the waterproof member  127 . 
     Next, the flat electric wire  123  is placed on the housing  124 , and the protrusions  128  and the pressure blades  125  are engaged with the flat electric wire  123 . When the pressure blades  125  are engaged with the through-holes  129 , the electric wire  122  and the pressure terminals (not shown) are connected via the pressure blades  125 . 
     The waterproof member  127  is folded from the cover  126  side. Then, the cover  126  is closed to cover the back portion  124   a  of the housing  124 , thereby sandwiching the end of the flat electric wire  123  between the cover  126  and the housing  124  together with the waterproof member  126  while the folded waterproof member  127  is pressed in a thickness direction. Accordingly, the end of the flat electric wire  123  is connected to the connector  120 , and the waterproofing of a connection portion between the end of the flat electric wire  123  and the connector  120  by the waterproof member  127 , and the waterproofing of a tip end of the flat electric wire  123  are performed concurrently. 
     As described above, although JP 2004-319267 A discloses a configuration in which a plurality of electric wires can be connected compactly and precisely with a simple operation, JP 2004-319267 A does not refer to a preferred structure for wiring of relay cables connecting electronic function modules to electronic elements in the case where a plurality of kinds of electronic function modules are allowed to be connected selectively to other electronic elements. 
     For example, in notebook computers, a plurality of kinds of wireless communication modules for controlling the communication by Wireless Wide Area Network (WWAN), Wireless Local Area Network (WLAN), Global Positioning System (GPS), Bluetooth (registered trademark), etc., are mounted so as to be used selectively. In this case, for example, a connection terminal of an internal antenna (internal antenna terminal) and any of the communication modules are connected to each other via a relay cable. 
     As a use example of a relay cable in such a configuration, relay cables corresponding to the number of contained communication modules are prepared in accordance with the relay lengths between respective positions of the communication modules and the internal antenna terminal, and a relay cable for a predetermined communication module is selected for use. In this case, it is necessary to select a relay cable from the plurality of relay cables in accordance with the specification during assembly of a notebook computer or to replace a relay cable in accordance with a change in specification in some cases, which causes low assembly workability. 
     As another method, it also is considered to use one relay cable adjusted so as to have a length capable of connecting selectively an internal antenna terminal to a plurality of kinds of communication modules. More specifically, a relay cable is adjusted to a length reaching a communication module placed at the farthest position from the internal antenna terminal, whereby the connection between the internal antenna terminal and the plurality of kinds of communication modules is enabled with one relay cable. In this case, for connecting the internal antenna terminal to the communication module closer to the internal antenna terminal, an excess length is caused in a relay cable. 
     Conventionally, an excess length portion of the relay cable caused during assembly of an apparatus is folded and fixed in an appropriate excess space inside a housing of electronic equipment. However, with such handling of a relay cable, an excess length varies depending upon the difference in communication module to be connected, which leads to a case where the position at which the excess portion is placed is not constant. Therefore, noise generated due to the excess portion fluctuates along with a change in placement of the excess portion, and the noise may cause, for example, the transmission/reception characteristics with respect to an antenna to be unstable. 
     There also is a possibility that a relay cable comes into contact with a conductive portion in electronic equipment to cause a short-circuit, depending upon the way of handling of an excess portion of a relay cable. 
     Embodiment 2 has an objective of providing electronic equipment having a wiring structure capable of placing simply and stably an excess length portion of a relay cable, which occurs depending upon the difference in a target to be connected in the case of using a relay cable having a constant length. 
       FIG. 7  is a perspective view illustrating an outer appearance of a notebook computer as an example of electronic equipment in Embodiment 2. The notebook computer has a main housing  101 , a display housing  102 , and a hand grip  103 .  FIG. 7  illustrates a non-use state of the notebook computer.  FIG. 8  is a perspective view of the notebook computer in a use state. An upper side of the main housing  101  in the state of the notebook computer illustrated in  FIG. 8  is defined as a “main body top surface  101   a ”, and a lower side thereof is defined as a “main body bottom surface  101 ”. 
     The main housing  101  contains, a CPU, a circuit board on which various electric elements are mounted, a hard disk drive, a battery, and the like. The display housing  102  includes a display panel  104  for displaying an image, a character, etc. As the display panel  104 , for example, a liquid crystal display  4  can be used. The main housing  101  and the display housing  102  are supported with respect to each other so as to be opened/closed by hinges  105 . On the main body top surface  101   a , a keyboard  106  and a pointing device  107  are placed. 
     The pointing device  107  is fixed in the main housing  101 , and an operation surface thereof is exposed to the surface of the main body top surface  101   a  of the main housing  101 . The main housing  101  can be molded with, for example, three-dimensional polycondensable thermosetting resin so as to maintain robustness of a notebook computer. It is desired that the main housing  101  is molded with light metal such as aluminum or magnesium, or an alloy thereof so as to realize robustness and light weight. 
     A pair of grip holding portions  108  are formed on one side surface of the main housing  101 . The pair of grip holding portions  108  are placed at an interval and stick out form the side surface of the main housing  101  to form convex portions. The hand grip  103  is connected to the grip holding portions  108  and used for being grasped by a hand when the notebook computer is carried about. On an upper end surface of the display housing  102  in the state of  FIG. 8 , opposed to the hinges  105 , internal antennas  109  are placed. The internal antennas  109  are configured so as to be selectively connected to communication modules (described later) via relay cables. 
     The grip holding portions  108  have connecting portions  108   a  and  108   b  (see  FIG. 8 ) connected to the hand grip  103 . The connecting portions  108   a ,  108   b  are formed so as to lean to the main body top surface  101   a  side. The connecting portion  108   a  of one grip holding portion  108  extends to the other grip holding portion  108 , and the connecting portion  108   b  of one grip holding portion  108  extends to the other grip holding portion  108 . The hand grip  103  and the connecting portions  108   a ,  108   b  are connected to each other so as to move with respect to each other. The hand grip  103  and the connecting portions  108   a ,  108   b  can assume a state in which the hand grip  103  is housed on the main housing  101  side as illustrated in  FIG. 8 , and a state in which the hand grip  103  is extracted from the main housing  101  as illustrated in  FIG. 7 . 
       FIG. 9  is a perspective view illustrating the underside of the notebook computer relative to  FIG. 7 . In order to form a gap between the hand grip  103  and the placement surface in the state of  FIG. 7 , differences in level  108   c  and  108   d  are formed respectively between the main body bottom surface side of the grip holding portions  108  and the connecting portions  108   a ,  108   b . Further, in order to provide a part of the function of a radiating unit, the grip holding portion  108  on the connecting portion  108   a  side is provided with an inlet port  110 . The inlet port  110  is formed of, for example, punching metal, and ensures air permeability by its opening. 
       FIG. 10  is a plan view illustrating a state in which a portion (main body bottom surface  101   b ) covering the reverse surface of the main housing  101  is removed from the state of  FIG. 9 .  FIG. 10  illustrates only characteristic portions of an inner structure of the notebook computer of the present embodiment, and the configuration of portions other than the characteristic portions are omitted. More specifically, the present embodiment is characterized by a structure for wiring of relay cables  112  due to the cable holder  111  placed in the main housing  101 . Therefore,  FIG. 10  illustrates merely elements related to the function of the cable holder  111 . 
     The main housing  101  includes the cable holder  111 , the relay cables  112 , a plurality of kinds of communication modules  113  to  115 , and a terminal plate  116 . Although  FIG. 10  illustrates a notebook computer equipped with three kinds of communication modules, communication modules that are not shown also are mounted in the main housing  101 . The relay cables  112  include a plurality of cables for connection to the internal antennas  109 , connection to external antennas, etc. The terminal plate  116  is placed at a position close to the cable holder  111 . On the terminal plate  116 , connection terminals for connection to the internal antennas  109 , connection terminals for connection to the external antennas, and the like are provided. Respective one ends of the relay cables  112  are connected to the connection terminals of the terminal plate  116 . Connectors  112   a  are provided at the respective other ends of the relay cables  112 . The connectors  112   a  are connected to the communication modules  113  to  115 , etc. 
       FIG. 11  is a plan view of a region where the cable holder  111  is provided.  FIG. 12  is a perspective view of the cable holder  111 . The cable holder  111  has a main holding portion  111   a  and an auxiliary holding portion  111   b . The main holding portion  111   a  and the auxiliary holding portion  111   b  respectively are provided with a plurality of pinching pieces  117   a  to  117   c . The pinching pieces  117   a  to  117   c  respectively have a plate shape. The plurality of pinching pieces  117   a  is placed at an equal interval. The plurality of pinching pieces  117   b  is placed at an equal interval. The plurality of pinching pieces  117   c  is placed at an equal interval. The relay cables  112  can be inserted between the adjacent pinching pieces  117   a  of the plurality of pinching pieces  117   a , and thus, the pinching pieces  117   a  are allowed to hold the relay cables  112 . The relay cables  112  can be inserted between the adjacent pinching pieces  117   b  of the plurality of pinching pieces  117   b , and thus, the pinching pieces  117   b  are allowed to hold the relay cables  112 . The relay cables  112  can be inserted between the adjacent pinching pieces of the plurality of pinching pieces  117   c , and thus, the pinching pieces  117   c  are allowed to hold the relay cables  112 . In the present embodiment, the outer diameters of the plurality of relay cables  112  are identical. Therefore, the relay cables  112  held respectively by the pinching pieces  117   a  to  117   c  are placed at an equal interval. The interval of the plurality of pinching pieces  117   a , the interval of the plurality of pinching pieces  117   b , and the interval of the plurality of pinching pieces  117   c  can be determined appropriately depending upon the outer diameter of the relay cables  112  to be pinched. The pinching pieces  117   a  and  117   b  are an example of “a pair of holding portions”. 
     Further, as illustrated in  FIG. 12 , the height of the pinching pieces  117   a  to  117   c  preferably is set to be larger than the outer diameter of the relay cables  112 . This is advantageous for wiring in the case where at least one of the communication modules  113  to  115  is omitted (in the case where not all the communication modules are mounted due to a user&#39;s desire, regional request, etc.), for example, as illustrated in  FIG. 13 . More specifically, the communication module  115  is omitted in the notebook computer illustrated in  FIG. 13  (indicated by a broken line in  FIG. 13 ), and when a portion in the vicinity of the connector  112   a  of the relay cable  112  to be connected to the omitted communication module  115  is left, the connector  112   a  will swing freely. When the connector  112   a  swings freely, the connector  112   a  may come into contact with, for example, a conductive portion to cause a short-circuit. In the present embodiment, even when at least any one of the communication modules  113  to  115  is omitted, the relay cables  112  are held by the pinching pieces  117   a  to  117   c , which can prevent the connector  112   a  from coming into contact with, for example, a conductive portion. The height of the pinching pieces  117   a  corresponds to the height from the plate surface of the main holding portion  111   a  to the tip end of the pinching pieces  117   a . The height of the pinching pieces  117   b  corresponds to the height from the plate surface of the main holding portion  111   a  to the tip end of the pinching pieces  117   b . The height of the pinching pieces  117   c  corresponds to the height from the plate surface of the auxiliary holding portion  111   b  to the tip end of the pinching pieces  117   c.    
     In this case, the vicinity of the connector  112   a  of the relay cables  112  can be held as illustrated in  FIG. 13 . In the wiring illustrated in  FIG. 13 , the vicinity of the connector  112   a  of the relay cable  112  is folded and superimposed on said relay cable  112  pinched by the pinching pieces  117   c  to be pinched by the pinching pieces  117   c . This can prevent the vicinity of the connector  112   a  of the relay cables  112  from swinging, and suppress the occurrence of a short-circuit caused by the free swing of the connector  112   a  portion. The vicinity of the connector  112   a  of the relay cable  112  may be pinched by the pinching pieces  117   a  and  117   b , or may be superimposed on another relay cable  112 . 
     The internal antennas  109  can be used by a plurality of kinds of electronic function modules. One end of one relay cable  112  is connected to the connection terminal with respect to the internal antenna  109  provided on the terminal plate  116 . The other end of said relay cable  112  is connected to any of the plurality of kinds of communication modules  113  to  115 , etc. Further, one end of another relay cable  112  is connected to the connection terminal with respect to the outer antenna provided on the terminal plate  116 . The other end of said relay cable  112  is connected to any of the plurality of kinds of communication modules. 
     The relay cable  112  for connection to the internal antenna is adjusted so as to have a length capable of selectively connecting the connection terminal with respect to the internal antenna to the plurality of kinds of communication modules  113  to  115 , etc. The relay cable  112  for connection to the external antenna is similarly adjusted so as to have a length capable of selectively connecting the connection terminal with respect to the external antenna to the plurality of kinds of communication modules  113  to  115 , etc. More specifically, the relay cable  112  has a length reaching the communication module to be connected, placed at a position farthest from the connection terminal with respect to the antenna. 
     Thus, in the case of connecting the connection terminal with respect to the antenna to the communication module closer to the connection terminal, an excess length is caused in the relay cable  112 . Such an excess portion of the relay cable  112  can be held by the pinching pieces  117   a ,  117   b . It is preferred that the pinching pieces  117   a  hold an excess portion of the relay cable  112  when the excess portion of the relay cable  112  is short. It is preferred that the pinching pieces  117   b  hold an excess portion of the relay cable  112  when the excess portion of the relay cable  112  is long. The pinching pieces  117   a  can hold an excess portion of the relay cable  112  even when the excess portion of the relay cable  112  is long. More specifically, when an excess portion of the relay cable  112  is long, the pinching pieces  117   a  and  117   b  are allowed to hold the excess portion of the relay cable  112 , and when an excess portion of the relay cable  112  is short, the pinching pieces  117   a  are allowed to hold the excess portion of the relay cable  112 . 
     Further, it is preferred that the relay cable  112  of a portion directed from the main holding portion  111   a  to each communication module is held by the pinching pieces  117   c  of the auxiliary holding portion  111   b . Thus, the position of the relay cable  112  in a portion directed to each communication module is stabilized. 
     As described above, by allowing the cable holder  111  placed at a predetermined position to hold an excess portion of the relay cable  112 , the excess portion is positioned at a predetermined place. Thus, the relay cable  112  having a length corresponding to the placement of a communication module to be connected does not need to be prepared, and hence, assembly workability is enhanced. Further, noise characteristics between the connection terminal of the internal antenna, the external antenna, etc. and the communication module are stabilized, and hence, processing by a circuit becomes easy. Further, a short-circuit and the like caused by the contact of the relay cable  112  with another conductive portion, etc. can be prevented. 
     In the above-mentioned configuration, the case has been described where wiring for connection to the internal antenna  109  and connection to the external antenna is performed. However, even in the case of wiring for only the connection to the internal antenna  109 , practical effects are obtained sufficiently. 
     In the present embodiment, the notebook computer has been described as an example of electronic equipment. However, even when the construction of the present invention is applied similarly to various electronic equipment, similar effects can be obtained. Further, the present invention is not limited to the connection between a communication module and an antenna, and even when the construction of the present invention is applied similarly to electronic equipment having a configuration in which a plurality of kinds of electronic function modules are connected selectively to internal electronic elements that can be used by the electronic function modules via relay cables, in addition to a communication module being connected to an antenna, similar effects can be obtained. 
     Further, as long as a plurality of electronic function modules are mounted, the effects of the present invention can be obtained appropriately irrespective of the number of the electronic function modules. Further, the connection form between the electronic function modules and the internal electronic elements is not limited to the above-mentioned embodiment. More specifically, the effects of the present invention can be obtained as long as a relay cable is connected selectively, and an excess length varies depending upon the connection form thereof. 
     According to the electronic equipment disclosed by the present invention, an excess portion of a relay cable is positioned at a predetermined place, and noise characteristics between a connection terminal of an internal electronic element such as an antenna and an electronic function module such as a communication module is stabilized, which is useful for a notebook computer, etc. 
     The invention may be embodied in other forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed in this application are to be considered in all respects as illustrative and not limiting. The scope of the invention is indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are intended to be embraced therein.