JP2008160534A - Portable radio apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a portable radio apparatus capable of reducing thickness without substantially deteriorating antenna characteristics of an antenna built in a housing. <P>SOLUTION: A cell-phone K comprises: a key sheet member 29 in which a plurality of key members 10-12 provided on one surface side of a sheet-like body 31 comprising insulating materials are arranged in a housing 2 so as to be exposed from an opening 2f of the housing 2, and a metal frame member 41 is provided between the key members 10-12 and the sheet-like body 31; a key switch 27 arranged facing the key members 10-12 on the other surface side of the sheet-like body 31; and an antenna 23 arranged in the housing 2 facing the key members 10-12 on the other surface side of the sheet-like body 31. In a frame member 41, a notch part 43 is formed in a portion opposing to the antenna 23, and the portion facing the notch part 43 of the sheet-like body 31 is formed to be thick. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a portable wireless device such as a portable telephone, a PDA (Personal Digital Assistants) having a wireless function, and a portable personal computer.

  Some portable wireless devices such as mobile phones, PDAs (Personal Digital Assistants) having a wireless function, and portable personal computers have a plurality of keys as an input unit. In such a key, a key member disposed on one surface side of a key sheet member formed of an insulating material such as a resin is usually directed outward from an opening formed in a casing of the portable wireless device. It is constituted by being exposed. A key switch that is operated by pressing the key member is disposed inside the housing, and the key switch is operated when the operator presses the key member (for example, Patent Documents). 1).

  By the way, in a portable wireless device including such a key, an external force may be applied to the key member by an act of intentionally pulling the key member by an operator or a drop impact. When such an external force is applied, the key member may be lifted due to a cause such as bending of the key sheet member. Therefore, it is necessary to take countermeasures in the portable wireless device. In particular, in a portable wireless device that employs a so-called frameless key structure in which different key members are arranged adjacent to each other and no frame portion or the like exists between the different key members, the key sheet member is formed of a strong housing. Since the supporting force is weak and the key member is likely to float, there is a high possibility that the key member is shifted from a predetermined arrangement position.

  For this reason, in the conventional portable wireless device, the key member described above is arranged on a base portion formed by integrally arranging a resin frame member that is strong and difficult to deform with respect to the key sheet member. ing. Since such a base portion has higher strength than the key sheet member alone, the key member can be prevented from floating even when an external force is applied.

  On the other hand, the portable radio has a structure that extends the antenna from the inside of the housing to the outside, and although some space is required, the main part of the antenna is exposed to the outside. Therefore, there was little constraining influence on the inside of the case due to the antenna.

However, in recent years, built-in antennas are often used for the purpose of downsizing portable radios and improving portability. For example, Patent Document 2 discloses a chip antenna that is a built-in antenna provided on a flexible substrate, and this flexible substrate is fixed to a shield case.
JP 2003-283176 A JP 2000-134020 A

  However, when a resin frame member is used for the base portion, it is necessary to increase the thickness of the base portion in order to sufficiently increase the strength of the base portion, and the thickness of the base portion itself is increased. For this reason, in a portable wireless device such as a cellular phone that is particularly required to be thin, the thickness of the frame member is a cause of hindering the thinning of the device.

  Moreover, even if a resin frame member is used, deformation such as warping may occur, and even when a base portion having a resin frame member is used, the key member may float. .

  Further, in the conventional portable wireless device, when there is a metal other member around the antenna due to the built-in antenna, the metal wireless communication function of the antenna is hindered by the metal of the other member. If an attempt is made to incorporate the antenna at a position where this can be avoided, the size of the communication device increases, and thus there is a problem that it is not easy to secure an antenna arrangement space in the housing.

  The present invention has been made in view of the above-described problems, and it is an object of the present invention to provide a portable wireless device that can be thinned without greatly degrading the antenna characteristics of an antenna built in a housing.

  That is, the portable wireless device of the present invention has a housing having an opening and a key member disposed on one surface side of a sheet-like body made of an insulating material so as to be exposed from the opening of the housing. A key sheet member provided with a conductive frame member between the key member and the sheet-like body, and disposed in the housing opposite to the other surface side of the sheet-like body. And a key switch that operates when the key member is pressed, and an antenna disposed in the casing on the other surface side of the sheet-like body and facing the key member, and the frame member Is provided with a notch at a portion facing the antenna, and a portion of the sheet-like body facing the notch is formed thick.

  ADVANTAGE OF THE INVENTION According to this invention, the portable radio which can be reduced in thickness can be provided, without significantly deteriorating the antenna characteristic of the antenna incorporated in a housing | casing.

  1 to 5 show one embodiment according to the present invention, and the embodiment described here is a case where the present invention is applied to a mobile phone.

  As shown in FIG. 1, a mobile phone (portable wireless device) K according to this embodiment is overlapped with a first casing 1 having a substantially rectangular plate shape and a thickness direction of the first casing 1. A second casing 2 having a substantially rectangular plate shape that can be combined, and a hinge portion 3 that couples the two casings 1 and 2 so as to be foldable with each other are provided. In addition, the hinge part 3 is distribute | arranged so that each base end part 1a, 2a of the two housings | casings 1 and 2 may be connected.

  Inside the second housing 2, a display unit 4 such as an LCD (Liquid Crystal Display), an organic EL (Electro Luminescence) display, an inorganic EL display, etc. having a display surface for displaying various information, and a speaker unit 5 for calling. Is provided. The display surface of the display unit 4 is exposed on the facing surface 1c side of the first housing 1 facing the second housing 2 in a state where the two housings 1 and 2 are overlapped with each other.

  The speaker unit 5 is disposed on the distal end portion 1b of the first housing 1 located on the opposite side to the base end portion 1a, and from the facing surface 1c of the first housing 1 to the first housing 1. It is exposed to the outside through a hole 1d penetrating into the internal space.

  Inside the second housing 2, there are a key operation unit 15 having a plurality of key members 10 to 14 that can be pressed down variously such as numeric keys, cursor keys, function keys such as a call key and a call end key, and a call. The microphone unit 6 is provided. Each of the key members 10 to 14 of the key operation unit 15 is formed on the facing surface 2c of the second casing 2 that faces the first casing 1 in a state where the two casings 1 and 2 are overlapped with each other. The opening 12 is exposed to the outside.

  The microphone unit 6 is disposed on the distal end portion 2b of the second casing 2 located on the side opposite to the base end portion 2a, and the second casing 2 has an opposing surface 2c. It is exposed to the outside through a hole 2d penetrating into the internal space.

  The second housing 2 constitutes a front case 17 constituting the facing surface 2c side of the first housing 1, and an outer surface (surface opposite to the facing surface 2c) side of the second housing 2. The rear case 19 is provided. The front case 17 and the rear case 19 can be coupled to each other in the thickness direction of the second casing 2.

  As shown in FIG. 2, the second housing 2 has a battery 22 and a circuit board 24 on which electronic components are mounted from the inner surface side of the rear case 19, and a conductive part partially formed of resin parts. A key case 28 having a key switch 27 and a key sheet member 29 having a plurality of key members 10 to 14 are arranged in an overlapping manner. A plurality of key member groups are exposed outward from the opening 2 f formed in the front case 17.

  In addition, the first antenna 21 for wireless communication is accommodated on the tip 2b side inside the second housing 2, and diversity is formed on the circuit board 24 with the first antenna 21. A second antenna 23 is mounted. The first antenna 21 is arranged so that the radiating element does not overlap the circuit board 24, the shield case 25, and the key board 28, and the second antenna 23 is one of the plurality of key members 10 to 14. It arrange | positions in the position facing a some key member (refer FIG. 4).

  Here, as shown in FIG. 3, the key sheet member 29 includes a sheet-like body 31 made of an insulating material having elasticity such as resin and rubber, and a plurality of sheets provided on one surface side of the sheet-like body 31. The key member 10-14 is comprised including the frame member 41 which is distribute | arranged between each key member 10-14 and the sheet-like body 31, and consists of metal materials.

  The sheet-like body 31 has a first plane 32 whose one surface side is stepped down, and a plurality of projecting portions 33 projecting from the position where the plurality of key members 10 to 12 are arranged from the first plane 32. A second plane 34 with the other surface side lowered, and a plurality of pushers (projecting from a portion of the second plane 34 facing the plurality of projections 33 and pressing the key switch 27 by pressing the key members 10-12) (Not shown).

  The frame member 41 is preferably formed of a light and high-strength metal material such as stainless steel or titanium, and has a plate-like body having a plurality of openings 42 through which the protrusions 33 are inserted. When the frame member 41 is placed on the first flat surface 32 of the sheet-like body 31, the protruding portion 33 is formed so as to protrude slightly from the frame member 41.

  The key members 10 to 14 are made of an insulating material such as resin or plastic. After the frame member 41 is placed on the sheet-like body 31, the key sheet member is attached to the top surface of the protruding portion 33 by thermocompression bonding or the like. 29, thereby having a frameless key structure in which the key members 10a to 10e, 11a to 11e, and 12a to 12e are arranged adjacent to each other. For this reason, the front case 17 forming the second housing 2 is not provided with a frame for partitioning each of the key members 10a to 10e, 11a to 11e, and 12a to 12e, and an opening surrounding a plurality of key member groups. It has a part 2f.

  At this time, since the frame member 41 is disposed between the sheet-like body 31 and the key members 10a to 10e, 11a to 11e, and 12a to 12e having an area larger than the opening 42, the key member Even if any one of 10a to 10e, 11a to 11e, and 12a to 12e is pressed, the frame member 41 made of a metal material does not come off, and an appropriate reaction force against pressing can be generated.

  The key sheet member 29 including the frame member 41 is disposed on the shield case 25 inside the second housing 2 via the key substrate 28 as shown in FIG. As a result, the key sheet members 10 a to 10 e, 11 a to 11 e, and 12 a to 12 e arranged on the key sheet member 29 are exposed inside the second casing 2 so that they are exposed at the opening 2 f of the second casing 2. 29 is supported.

  Thus, if the frame member 41 is arranged between the key members 10a to 10e, 11a to 11e, 12a to 12e and the sheet-like body 31, the strength of the base portion is improved in the conventional mobile phone (portable wireless device). Compared with the resin frame member used for making it, it can exhibit high strength even if it is thin. Therefore, according to the mobile phone K of this embodiment, the thickness of the key sheet member 29 can be reduced without reducing the strength, and the mobile phone K can be made thinner. Further, since the frame member 41 made of a metal material is less likely to be deformed by heat or the like as compared with the resin frame member, no warp or the like occurs.

  As shown in FIG. 4, the second antenna 23 is disposed at a position facing one or a plurality of key members among the plurality of key members 10 to 12, and the frame member 41 and the second antenna 23 are the second. However, in the present invention, the frame member 41 is provided with a notch 43 at a portion facing the second antenna 23, and the frame member 41 is configured not to overlap the second antenna 23 and the second casing 2 in the thickness direction. For this reason, the deterioration of the antenna characteristics due to the conductor being arranged near the second antenna 3 is reduced.

  On the other hand, in the first flat surface 32 of the sheet-like body 31, the portion corresponding to the notch 43 when the frame member 41 is placed protrudes from the second flat surface 34 so as to be thicker than the other portion. A convex portion 36 is formed. Thus, by forming the sheet-like body 31 corresponding to the notch 43 of the frame member 41 thick, the amount of deformation at that portion can be reduced. For this reason, when the key members 10d and 10e without the frame member 41 are pressed, the click feeling is pressed with the other key members 10a to 10c, 11a to 11e, and 12a to 12e with the frame member 41 provided. It is possible to prevent the click feeling from being greatly different from each other and to obtain an equivalent click feeling by pressing any of the key members 10a to 10c, 11a to 11e, and 12a to 12e.

  Further, as shown in FIG. 3, the frame member 41 has two extending portions 46a and 46b on one end side, and the other end side of the frame member 41 has one extending portion 46c. Holes 47a to 47c are formed in the protruding portions 46a to 46c. Further, the extending portion 46c has a spring terminal 47 having a spring property extending further outward.

  On the other hand, the sheet-like body 31 is formed up to the lower surface of the extending portion so as to support the extending portion 47 c, and has a configuration in which only a portion facing the spring terminal 47 is cut out. Further, when the frame member 41 is placed on the sheet-like body 31, the projections 37a to 37c are provided at positions facing holes 47a to 47c formed in the extending portions 46a to 46c of the frame member 41, The projections 37 a to 37 c are inserted into the holes 47 a to 47 c so that the frame member 41 is positioned at a predetermined position on the sheet-like body 31.

  Thus, by forming the sheet-like body 31 to the lower surface of the extending portion 47c where the spring terminal 47 is formed, the operator accidentally hits the frame member 41 made of a metal material during the assembly operation, and the extending portion. The fear of damaging 46C and the spring terminal 47 can be prevented. Moreover, the notch is provided in the site | part facing the spring terminal 47, and damage to the spring terminal 47 can also be prevented. Therefore, if the key sheet member 29 is placed on the shield case 25 via the key substrate 28, the spring terminal 47 can be urged toward the shield case 25, so that conduction can be ensured.

  Therefore, since static electricity or the like entering the opening 2f from the outside can be released through the frame member 41, it is possible to take countermeasures against static electricity for the electronic components and the like provided in the second housing 2.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the specific configuration is not limited to the above-described embodiments, and design changes and the like can be made without departing from the scope of the present invention. .

  For example, in the above embodiment, a mobile phone has been described as an example of the portable wireless device of the present invention. However, the present invention is not limited to a cellular phone, and can be applied to a portable wireless device including a plurality of keys for pressing and requiring a reduction in thickness.

  Further, although the mobile phone of the above embodiment is of a folding type, the present invention is also applicable to a straight type mobile phone that does not include the hinge portion 3.

It is a front view which shows the mobile phone of this invention. It is sectional drawing which shows the 2nd housing | casing which comprises the mobile telephone of this invention. It is a disassembled perspective view which shows the key sheet member with which the mobile telephone of this invention is equipped. It is a top view which shows the relationship between the key sheet member with which the mobile telephone of this invention is equipped, and a 2nd antenna. It is a figure which shows the key sheet | seat member which shows the convex part with which a sheet-like body is equipped, and its principal part.

Explanation of symbols

1: first housing, 2: second housing, 2f: opening, 3: hinge portion, 10-12: key member, 23: second antenna, 27: key switch, 31: sheet-like body, 36 : Convex part, 41: frame member, 43: notch

Claims (1)

A housing having an opening and a plurality of key members disposed on one surface side of a sheet-like body made of an insulating material are disposed in the housing so as to be exposed from the opening of the housing, and the plurality A key sheet member provided with a frame member made of a metal material between the key member and the sheet-like body, and disposed in the casing so as to face the other surface side of the sheet-like body, and the key A key switch that operates by pressing the member; and an antenna that is disposed in the casing on the other surface side of the sheet-like body and faces the key member, and the frame member faces the antenna. A portable wireless device comprising a cutout portion at a portion to be formed, and a portion of the sheet-like body facing the cutout portion is formed thick.

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