JP2006013235A - Portable terminal device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve the reliability of a portable terminal device by maintaining the strength of a printed wiring board at a high level while an enclosure is maintained thinly. <P>SOLUTION: A notched section 31 used for avoiding a connector 4 for memory card is formed in the printed wiring board 3 and, at the same time, first and second reinforcing plates 5 and 6 are arranged on both surface sides of the wiring board 3 so that the plates 5 and 6 may face each other with the notched section 31 in between. Then the wiring board 3 is fixed with screws 7 and 8 in a state where the connector 4 for memory card is placed and fixed on the first reinforcing plate 5 through the notched section 31 and the wiring board 3 is put between the first and second reinforcing plates 5 and 6. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a mobile terminal device such as a mobile phone or a PDA (Personal Digital Assistant), and more particularly to a mobile terminal device containing a connector for mounting a memory card or the like.

  2. Description of the Related Art In recent years, mobile terminal devices typified by mobile phones have been made lighter, thinner, and smaller with the demand for reduction in size and weight by users. On the other hand, mounting of large circuit components such as a memory card connector is required with the demand for higher functionality of the device.

In order to meet such conflicting demands, conventionally, for example, a structure has been proposed in which a notch is formed in a part of a printed wiring board on which various circuit components are mounted, and the memory card connector is disposed in the notch. (For example, refer to Patent Document 1). Employing such a structure makes it possible to reduce the thickness of the housing as compared with the case where the memory card connectors are arranged on the printed wiring board.
Patent 3329230.

  However, in the above proposed structure, the strength of the printed paper wiring board is reduced by forming the notch in the printed wiring board, and as a result, the printed wiring board is liable to be cracked or broken. It was very unfavorable because it caused a decrease in reliability.

  The present invention has been made paying attention to the above circumstances, and its object is to maintain a high strength of the printed wiring board while keeping the casing thin, thereby improving the reliability of the device. To provide an apparatus.

  In order to achieve the above object, a first invention is a portable terminal device in which a printed wiring board and a connector are accommodated in a housing, and a notch for avoiding the connector is formed in the printed wiring board. The reinforcing member is arranged at a position facing the notch, and the reinforcing member is fixed to the printed wiring board in a state where the connector is placed and fixed on the reinforcing member through the notch. It is.

  Therefore, according to the first invention, since the connector is housed in the cutout portion of the printed wiring board, the casing is held thin, and the printed wiring board is reinforced by the reinforcing member, so that the strength is obtained by forming the cutout portion. The above problem is also solved. As a result, it is possible to provide a highly reliable portable terminal device.

  According to a second aspect of the present invention, a cutout portion for avoiding the connector is formed on the printed wiring board, and the first and second reinforcing members are arranged at positions facing each other with the cutout portion interposed therebetween, and the connector is inserted into the cutout The printed wiring board is sandwiched and fixed from both sides by the first reinforcing member and the second reinforcing member in a state where the printed wiring board is placed and fixed on the first reinforcing member through the portion. .

  Therefore, according to the second invention, the printed wiring board is fixed in a state where the printed wiring board is sandwiched by the first and second reinforcing members from both sides of the board at the position where the notch is formed. For this reason, for example, compared with the case where the printed wiring board is reinforced on one surface thereof, it is possible to reinforce with higher strength.

  In the first and second aspects of the invention, the reinforcing member may be composed of a conductive metal member, and the reinforcing member may be connected to the ground pattern of the printed wiring board. If comprised in this way, it will become possible to give a shield function to a reinforcement member, and, thereby, a connector can be shielded electromagnetically from the circumference | surroundings and the reliability improvement on a circuit characteristic can also be aimed at.

  Furthermore, when the wireless unit is stored in the housing, the reinforcing member may be disposed on the surface of the printed wiring board on the side close to the wireless unit. With this configuration, even when a single reinforcing member is used, the reinforcing member can effectively shield the connector from the radio unit, thereby further enhancing the shielding effect.

In short, in the present invention, when a notch for avoiding the connector is formed on the printed wiring board, a reinforcing member is disposed at a position facing the notch, and the connector is placed and fixed on the reinforcing member. The reinforcing member is configured to be fixed to the printed wiring board.
Therefore, according to the present invention, it is possible to provide a portable terminal device that maintains the strength of the printed wiring board while keeping the casing thin, thereby improving the reliability of the device.

  FIG. 1 is an exploded perspective view showing an embodiment of a portable terminal device according to the present invention. In this portable terminal device, a lower case 1 and an upper cover 2 form a casing, and a printed wiring board 3 and a memory card connector 4 are accommodated in the casing. Notch portions 11 and 21 are formed in the side surface portion of the lower case 1 and the side surface portion of the upper cover 2, respectively, and the notch portions 11 and 21 constitute a memory card insertion / removal opening.

  A cutout 31 is formed in the printed wiring board 3 as shown. The notch 31 is for accommodating the memory card connector 4 and its size is set slightly larger than the external size of the memory card connector. A pair of holes 32 and 33 are provided at positions facing each other across the notch 31 of the printed wiring board 3. These holes 32 and 33 are used as through holes for screws 7 and 8 described later.

  Incidentally, the first and second reinforcing plates 5 and 6 are arranged on both sides of the printed wiring board 3 so as to face each other with the notch 31 therebetween. These reinforcing plates 5 and 6 are made of rectangular metal plates having conductivity. Both side ends and back end of these metal plates are bent in a crank shape to form flange portions 51, 52 and 61, 62. The flange portions 51, 52 and 61, 62 are respectively threaded holes 54. , 55 and 64, 65 are provided. The flanges 51, 52 and 61, 62 are used as pedestals when the reinforcing plates 5, 6 are fixed to the printed wiring board 3.

  When assembling the apparatus with such a structure, first, the memory card connector 4 is dropped through the notch 31 of the printed wiring board 3 and placed and fixed on the bottom surface of the first reinforcing plate 5. As the fixing means, for example, fixing with an adhesive or an adhesive is used. Next, the second reinforcing plate 6 is arranged on the upper surface side of the printed wiring board 3, and the screw holes 64 and 65 are screw holes 64 of the printed wiring board 3 and the screw holes of the first reinforcing plate 5. Screws 7 and 8 are screwed in a state aligned with 54 and 55. At this time, the flange portions 61, 62 or 51, 52 of the second reinforcing plate 6 or the first reinforcing plate 5 are positioned so as to be in electrical contact with the ground pattern formed on the printed wiring board 3. The

  Thus, the printed wiring board 3 and the memory card connector 4 are integrally fixed by the first and second reinforcing plates 5 and 6. FIG. 2 is a longitudinal sectional view showing the structure after being integrated. As shown in the figure, the memory card connector 4 is accommodated in a notch 31 formed in the printed wiring board 3, and the printed wiring board 3 has first and second reinforcements at both end portions of the notch 31. The plates 5 and 6 are integrally fixed while being sandwiched from both sides.

  Because of such a structure, the memory card connector 4 is accommodated in the notch 31 formed in the printed wiring board 3, so that the height dimension is limited, thereby enabling the casing to be thinned. In addition, the printed wiring board 3 is reinforced by being integrally fixed at both end portions of the notch 31 while being sandwiched from both sides by the first and second reinforcing plates 5 and 6. For this reason, the problem of the strength due to the formation of the notch 31 is also solved, thereby improving the reliability of the apparatus.

  Further, the first and second reinforcing plates 5 and 6 are made of conductive metal plates, and these reinforcing plates 5 and 6 are electrically connected to the ground pattern formed on the printed wiring board 3. I have to. For this reason, the reinforcing plates 5 and 6 exhibit a function as a shield case, whereby the memory card connector 4 accommodated in the reinforcing plates 5 and 6 can be electromagnetically shielded from the outside. Therefore, the memory card mounted in the memory card connector 4 can be effectively protected from high frequency electromagnetic noise.

  The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the printed wiring board 3 is integrally fixed with the first and second reinforcing plates 5 and 6 sandwiched from both sides. However, the present invention is not limited thereto, and the reinforcing plate 5 or 6 may be disposed on either the front surface or the back surface of the printed wiring board 3 and fixed to the printed wiring board 3. If it does in this way, although reinforcement intensity | strength and a shield function will fall compared with the said embodiment, a height dimension can be reduced and the thickness reduction of a housing | casing will be attained.

  At that time, it is preferable to determine on which surface of the printed wiring board 3 the reinforcing plate 5 or 6 is placed in consideration of the location of the wireless unit including the high-frequency circuit in the housing. That is, the reinforcing member is disposed on the surface of the printed wiring board on the side close to the wireless unit. In this way, even when the number of reinforcing plates is one, the reinforcing plate can effectively shield the memory card connector from the wireless unit.

  Furthermore, although the case where a metal plate is used as the reinforcing member is illustrated in the above embodiment, the reinforcing member may be made of other materials such as a resin, in particular, when the reinforcing member does not need to have a shielding function. . Further, the shape, structure, fixing position, etc. of the reinforcing member can be set in any manner as long as at least the reinforcing performance of the printed wiring board is not impaired.

  In addition, the type and configuration of the mobile terminal device, the type of connector, the size and shape of the notch formed in the printed wiring board, the size and shape of the reinforcing member, and the like are variously modified without departing from the gist of the present invention. Can be implemented.

  In short, the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Further, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, you may combine suitably the component covering different embodiment.

The disassembled perspective view which shows one Embodiment of the portable terminal device concerning this invention. The longitudinal cross-sectional view which shows the principal part structure of the portable terminal device shown in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Lower case, 2 ... Upper cover, 3 ... Printed wiring board, 4 ... Memory card connector, 5 ... 1st reinforcement board, 6 ... 2nd reinforcement board, 7, 8 ... Screw, 31 ... Notch 32, 33 ... holes, 51, 52, 53, 61, 62, 63 ... reinforcing plate flanges, 54, 55, 64, 65 ... screw holes.

Claims (4)

A portable terminal device in which a printed wiring board and a connector are accommodated in a housing,
In the state where a notch for avoiding the connector is formed on the printed wiring board, a reinforcing member is disposed at a position facing the notch, and the connector is placed and fixed on the reinforcing member through the notch. The portable terminal device, wherein the reinforcing member is fixed to the printed wiring board. A portable terminal device in which a printed wiring board and a connector are accommodated in a housing,
A cutout portion for avoiding the connector is formed in the printed wiring board, and first and second reinforcing members are arranged at positions facing each other with the cutout portion interposed therebetween, and the connector is inserted through the cutout portion into the first portion. A portable terminal characterized in that the printed wiring board is sandwiched and fixed by the first reinforcing member and the second reinforcing member in a state where the printed wiring board is placed and fixed on one reinforcing member. apparatus.   3. The portable terminal device according to claim 1, wherein the reinforcing member is formed of a conductive metal member, and the reinforcing member is connected to a ground pattern of the printed wiring board. When a wireless unit is mounted on the first surface of the printed wiring board,
The portable terminal device according to claim 3, wherein the reinforcing member is disposed on at least a first surface of the printed wiring board.

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