JP2011049807A - Portable electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide portable electronic equipment raising a noise reduction effect in a shield case. <P>SOLUTION: A cellular phone 1 includes: a circuit board 29; an IC 51 mounted on the circuit board 29; and the shield case 55 which shields the IC 51. The shield case 55 includes: a frame 57 which is mounted on the circuit board 29 to surround the IC 51; and a cover 59 which is put on and attached to the frame 57. The cellular phone 1 further includes a magnetic sheet 61 stuck to the frame 57. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a portable electronic device such as a mobile phone, a PDA, and a game machine.

  A shield case having a frame body attached to a circuit board so as to surround an electronic component mounted on the circuit board and a lid body that covers the frame body so as to close the opening of the top surface of the frame body is known. (For example, patent document 1). Such a two-piece shield case (separate type shield case) is, for example, compared with a one-piece shield case or the like, after the frame body is soldered to the circuit board, the opening on the top surface of the frame body The electronic component is mounted on the circuit board with an underfill material such as resin through the, the electronic component mounted on the circuit board is imaged through the opening on the top surface, and the mounting state is inspected. Accordingly, there is a merit that a defect in mounting electronic components can be corrected (reworked) through the opening on the top surface.

JP 2007-266024 A

  Even in the portable electronic device having the two-piece shield case as described above, further noise reduction is desired. As a method for further reducing noise, it is conceivable to add a member functioning as a shield, such as covering a shield case composed of two pieces with a member functioning as a shield. However, when adding a member, it is desirable to suppress an increase in size and material. In other words, it is desired that the noise reduction effect is efficiently achieved.

  The objective of this invention is providing the portable electronic device which can improve the noise reduction effect in a shield case effectively.

  A portable electronic device according to the present invention includes a circuit board, a first electronic component mounted on the circuit board, a frame mounted on the circuit board and surrounding the first electronic component, and the frame body. A shield case having a lid attached and a magnetic sheet affixed to the frame.

  Preferably, the electronic device further includes a second electronic component mounted on the circuit board, and the frame body is erected on the circuit board and surrounds the first and second electronic components, and the wall portion Extending from a top portion of the first and second electronic components to the side surrounded by the wall portion, and facing only the first electronic component, and the magnetic sheet includes the extending portion. And is opposed to the first electronic component.

  Preferably, the extending portion has a corresponding portion formed in a contour along the contour of the first electronic component in a plan view of the circuit board, and the magnetic sheet has a contour along the contour of the corresponding portion. It has the part formed in.

  Preferably, the extending part has a beam part having one end connected to the top part of the wall part and the other end connected to the corresponding part.

  Preferably, the frame includes a hanging portion that is suspended from the edge of the corresponding portion on the second electronic component side toward the circuit board.

  Preferably, the first electronic component radiates more noise than the second electronic component.

  Preferably, the first electronic component is an IC, and the second electronic component is an electronic element constituting a receiving circuit.

  Preferably, the magnetic sheet is made of a material having a lower elastic coefficient than the material constituting the frame.

  Suitably, it has an electroconductive elastic member affixed on the outer surface of the said extension part, and the inner surface of the said cover body contact | abuts.

  Preferably, it has a push-type switch arranged in a stacked manner on the lid.

  ADVANTAGE OF THE INVENTION According to this invention, the noise reduction effect in a shield case can be improved effectively.

1 is an external perspective view of a mobile phone according to a first embodiment of the present invention. The disassembled perspective view of the 1st housing | casing of the mobile telephone of FIG. The disassembled perspective view which cuts out and shows a part of circuit board in the 1st housing | casing of FIG. Sectional drawing in the IV-IV line of FIG. FIG. 4 is a schematic cross-sectional view for explaining the effect of the shield case of FIG. 3. Sectional drawing corresponding to FIG. 4 which concerns on the 2nd Embodiment of this invention. The top view of the extension part which concerns on the modification of this invention.

(First embodiment)
FIG. 1 is an external perspective view showing a mobile phone 1 according to an embodiment of the present invention in an open state.

  The mobile phone 1 is configured as a so-called foldable mobile phone, and includes a first housing 3 and a second housing 5 that are rotatably connected to each other between an open state and a closed state. The first housing 3 and the second housing 5 are each formed, for example, in a generally thin rectangular parallelepiped shape, and are overlapped with each other in the closed state so that their contours substantially coincide with each other.

  Although not particularly shown, the first housing 3 is provided with, for example, a microphone for communication, a built-in antenna for communication, a speaker for notification, a camera, and an operation unit 7. Although not particularly illustrated, for example, a speaker for calling and a display unit 9 are provided in the second housing 5.

  The operation unit 7 includes a plurality of key tops 11 that accept a user's pressing operation. The plurality of key tops 11 are exposed on the facing surface 3s of the first housing 3 facing the second housing 5 in the closed state.

  FIG. 2 is an exploded perspective view of the first housing 3.

  In the first housing 3, a key plate 21, a front case 23, a key assembly 25, a shield assembly 27, a circuit board 29 and a battery 31, a rear case 33, and a lid 35 are stacked in this order from the upper side in the drawing. Has been. The circuit board 29 and the battery 31 are arranged in parallel in the stacking direction.

  The key plate 21, the front case 23, the rear case 33, and the lid 35 constitute the first housing 3. These members are made of, for example, resin, and are fixed to each other by an appropriate fixing part such as a screw, an adhesive, or an engaging part.

  The circuit board 29 is constituted by, for example, a rigid printed board based on a hard resin. Various electronic components 37 are arranged on the circuit board 29, and various electronic circuits are configured. Further, on the circuit board 29, a ground pattern layer 29c (only a part of which is shown) constituting a ground line of the circuit board 29 (electronic circuit) is arranged in a predetermined pattern.

  The shield assembly 27 includes a shield body 43 that covers the circuit board 29 and the like, and an FPC (flexible printed wiring board) 45 that is disposed on the front case 23 side of the shield body 43.

  The shield body 43 is made of, for example, a metal or a resin having a metal film formed on the surface. The shield body 43 is connected to the ground line by contacting the ground pattern layer 29c.

  The FPC 45 is connected to the circuit board 29 via a connector (not shown). For example, a plurality of switches 47 are provided on the mounting surface of the FPC 45 on the front case 23 side.

  The plurality of switches 47 are constituted by, for example, dome switches. The dome-shaped movable contact 47a (see FIG. 6 of the second embodiment) and the fixed contact 47b (the second embodiment of the second embodiment) facing the movable contact 47a. (See FIG. 6). When the plurality of switches 47 are pressed by the plurality of key tops 11, the movable contact 47 a is reversed and contacts the fixed contact 47 b.

  FIG. 3 is a schematic exploded perspective view showing a part of the circuit board 29 by cutting out.

  An IC 51 and a plurality of electronic elements 53 are mounted on the circuit board 29 as the electronic component 37 described above.

  The IC 51 functions as, for example, a logic device (CPU or the like), a memory, or both. The IC 51 is packaged with a hard material such as resin or ceramic, and is formed in a thin rectangular parallelepiped shape. The IC 51 may be an insertion mounting type in which terminals are inserted into the circuit board 29, or may be a surface mounting type in which terminals are arranged on the surface of the circuit board 29. Further, the IC 51 may be of a peripheral type in which terminals are provided around the package, or may be of an area array type in which terminals are provided on the lower surface of the package.

  The plurality of electronic elements 53 are, for example, resistors, capacitors, or inductors, and constitute at least a part of a receiving RF (Radio Frequency) circuit. The reception RF circuit demodulates (detects) a high-frequency signal received by an antenna (not shown) and outputs a low-frequency signal. As the plurality of electronic elements 53, known appropriate types of electronic elements may be employed, and the mounting method may be appropriately selected. Preferably, the electronic element 53 is a chip-type element and is surface-mounted on the circuit board 29.

  The IC 51 is an electronic component that emits more noise than each or all of the plurality of electronic elements 53. The IC 51 is a component having a larger area in plan view of the circuit board 29 than each of the plurality of electronic elements 53. The plurality of electronic elements 53 may be appropriately replaced, deleted, or added in the prototype / test stage of the mobile phone 1. The IC 51 is less likely to perform such substitution or the like than the plurality of electronic elements 53.

  The cellular phone 1 has a shield case 55 for shielding the IC 51 and the plurality of electronic elements 53.

  The shield case 55 includes a frame body 57 mounted on the circuit board 29 and a lid body 59 attached to the frame body 57. Each of the frame body 57 and the lid body 59 is formed, for example, by performing a pressing process such as a punching process, a drawing process, and a bending process on a single sheet metal.

  The frame body 57 includes a wall portion 57a surrounding the IC 51 and the plurality of electronic elements 53, an extending portion 57b extending from the top of the wall portion 57a to the side surrounded by the wall portion 57a, and an edge of the extending portion 57b. And a hanging portion 57c suspended from the circuit board 29 side.

  For example, the wall portion 57a is erected so as to be orthogonal to the circuit board 29, and is formed in a rectangular shape in plan view. Note that the wall portion 57a may be erected with respect to the circuit board 29, or may be formed in an appropriate shape such as a trapezoid in a plan view. For example, the wall 57a is formed such that the height from the circuit board 29 is constant over the entire circumference. Note that the height of the wall 57a may vary.

  For example, the extending portion 57b extends inward of the wall portion 57a so as to be parallel to the circuit board 29. The extending portion 57b includes, for example, an inner flange 57d extending along the wall portion 57a, a corresponding portion 57e that faces the IC 51, and a beam portion 57f that supports the corresponding portion 57e.

  For example, the inner flange 57d is provided over substantially the entire circumference of the wall portion 57a. The inner flange 57d has a relatively narrow constant width and extends along the wall portion 57a, for example. The inner flange 57d contributes to improving the rigidity of the frame body 57.

  The corresponding portion 57 e is formed in a contour that follows the contour of the IC 51 in a plan view of the circuit board 29. In other words, in plan view, the corresponding portion 57e has substantially the same shape and size as the IC 51, and overlaps with the IC 51 and does not overlap with the electronic component 37 other than the IC 51. In the present embodiment, the corresponding portion 57e is rectangular corresponding to the IC 51 being rectangular.

  The beam portion 57f is formed in an elongated shape, one end is connected to the wall portion 57a (inner flange 57d), and the other end is connected to the corresponding portion 57e. The number, width, and position of the beam portion 57f are appropriately set in consideration of various conditions related to the frame body 57 such as the size and position of the corresponding portion 57e.

  The hanging part 57c protrudes from the edge part on the side of the plurality of electronic elements 53 to the circuit board 29 side in the corresponding part 57e. In addition, the drooping portion 57c has, for example, a constant width and extends along the edge of the corresponding portion 57e. The hanging portion 57c separates the IC 51 and the plurality of electronic elements 53 (see also FIG. 4). The hanging portion 57c may or may not be in contact with the circuit board 29, and is preferably mounted on and in contact with the circuit board 29.

  The frame 57 is placed on a ground pattern layer 29c (see FIG. 2) formed in the same shape as the wall 57a in plan view. The wall 57a and the ground pattern layer 29c are fixed by solder. Thereby, the frame body 57 is fixed to the circuit board 29 and is electrically connected to the reference potential of the circuit board 29. The wall 57a may be provided with a protruding piece that is inserted into a through hole provided in the circuit board 29.

  The lid body 59 has a top surface portion 59 a that closes the top surface opening of the frame body 57, and a side surface portion 59 b that extends from the top surface portion 59 a to the circuit board 29 side and overlaps the wall portion 57 a of the frame body 57.

  For example, the top surface 59 a is formed in a plate shape whose outer shape in plan view is substantially the same as the outer shape of the frame 57 in plan view. The top surface portion 59a may be formed with a recess or a protrusion depending on the height of the electronic component 37 surrounded by the frame body 57 from the circuit board 29.

  The side surface portion 59b is provided, for example, over substantially the entire circumference of the top surface portion 59a. The side surface portion 59b is formed to extend in parallel with the wall portion 57a, for example.

  The lid 59 is placed on the frame 57, and the side surface 59b abuts against the wall 57a, whereby the circuit board 29 is positioned in the plane direction with respect to the frame 57. Further, the lid 59 is detached from the frame 57 by engaging a plurality of engaged portions 59g formed on the side surface portion 59b with a plurality of engaging portions 57g formed on the wall portion 57a. It is suppressed. The plurality of engaging portions 57g and the plurality of engaged portions 59g are, for example, protrusions and holes (including recesses) into which the protrusions are inserted. The lid 59 is electrically connected to the reference potential of the circuit board 29 via the frame 57 by contacting the frame 57.

  The mobile phone 1 further has a magnetic sheet 61 that is attached to the frame 57.

  The magnetic sheet 61 includes a magnetic body having a relatively high magnetic permeability. For example, the magnetic sheet 61 is made of resin or rubber containing magnetic powder. Examples of the magnetic material include ferrite, silicon steel, sendust alloy, Fe-Al alloy, electromagnetic soft iron, carbonyl iron, amorphous alloy, and permalloy. The magnetic material included in the magnetic sheet 61 or the magnetic sheet 61 has a higher magnetic permeability than, for example, a metal (for example, Al or Al alloy) constituting the shield case 55. The magnetic sheet 61 has a lower elastic coefficient than the material (metal) that constitutes the shield case 55. Further, the magnetic sheet 61 has flexibility, and more preferably has elasticity.

  For example, the magnetic sheet 61 is formed in a contour that follows the contour of the corresponding portion 57e (IC51) in plan view. And the magnetic sheet 61 is affixed on the inner surface of the corresponding | compatible part 57e with the adhesive agent or the double-sided tape, and is facing IC51.

  4 is a cross-sectional view taken along line IV-IV in FIG. As shown in this figure, the magnetic sheet 61 is in contact with the IC 51.

  A method of mounting the IC 51, the plurality of electronic elements 53, the shield case 55, and the magnetic sheet 61 will be described.

  The magnetic sheet 61 is affixed to the frame body 57 before the frame body 57 is mounted on the circuit board 29. First, the IC 51 is placed on the circuit board 29. Thereafter, the frame body 57 and the plurality of electronic elements 53 are placed on the circuit board 29. Any of the frame body 57 and the plurality of electronic elements 53 may be placed on the circuit board 29 first.

  In placing the frame body 57 on the circuit board 29, the frame body 57 is held and transported by the corresponding portion 57e being sucked by the suction-type robot hand. The adsorption may be vacuum adsorption or magnetic adsorption.

  The soldering of the IC 51, the plurality of electronic elements 53, and the frame body 57 is performed, for example, by reflow. The plurality of electronic elements 53 and the frame body 57 may be placed on the circuit board 29 and soldered after the IC 51 is soldered, or may be soldered simultaneously with the soldering of the IC 51. In addition, any of the plurality of electronic elements 53 and the frame body 57 may be placed on the circuit board 29 and soldered after being soldered first, or may be soldered simultaneously.

  When the soldering of the IC 51, the plurality of electronic elements 53, and the frame body 57 is completed, the lid body 59 is put on the frame body 57. Note that the mounting state of the plurality of electronic elements 53 may be inspected by the image inspection apparatus through the opening of the frame body 57 at an appropriate time before the cover body 59 is covered.

  According to the above embodiment, the mobile phone 1 includes the circuit board 29, the IC 51 mounted on the circuit board 29, and the shield case 55 that shields the IC 51. The shield case 55 is mounted on the circuit board 29, and includes a frame body 57 that surrounds the IC 51, and a lid body 59 that is attached to the frame body 57. Further, the mobile phone 1 has a magnetic sheet 61 attached to the frame 57.

  Therefore, the noise radiated from the IC 51 (or the noise to enter the IC 51) is not only shielded by the shield case 55 but also shielded by the magnetic sheet. That is, noise is converted into heat by the magnetic sheet and reduced. Furthermore, since the magnetic sheet 61 is affixed to the frame 57, the magnetic sheet 61 can be brought closer to the IC 51 as compared to the case where the magnetic sheet 61 is affixed to the outside of the lid 59. As a result, noise reduction by the magnetic sheet 61 can be performed efficiently.

  The cellular phone 1 further includes an electronic element 53 mounted on the circuit board 29. The frame body 57 is erected on the circuit board 29, extends from the top of the wall portion 57a to the side surrounded by the wall portion 57a, and surrounds the IC 51 and the electronic device 53. Only extending portions 57b facing each other. And the magnetic sheet 61 is affixed on the inner surface of the extension part 57b, and is facing the IC51.

  Accordingly, with respect to the electronic element 53, the top surface side of the frame body 57 is opened to obtain the merit (for example, ease of inspection and rework) of the two-piece type shield case, while regarding the IC 51, the magnetic sheet 61 is provided. An effective noise reduction effect can be obtained by approaching.

  FIG. 5 is a schematic cross-sectional view for explaining in detail the efficient noise reduction effect by sticking the magnetic sheet 61 to the inner surface of the extending portion 57b. Specifically, FIG. 5A shows a cross-sectional view when the magnetic sheet 161 is attached to the inner surface of the lid 59. FIG. 5B shows a cross-sectional view of the present embodiment.

  As shown in FIG. 5A, when the magnetic sheet 161 is attached to the lid 59, in order to bring the magnetic sheet 161 close to the IC 51, for example, to bring the magnetic sheet 161 into contact with the IC 51, magnetic The sheet 161 must have a thickness equivalent to the distance between the IC 51 and the top surface portion 59a. On the other hand, as shown in FIG. 5B, in this embodiment, the magnetic sheet 61 can be made thinner by the thickness of the extending portion 57b than in FIG. 5A. For example, the extension 57b has a thickness of about 0.3 mm, and the magnetic sheet 161 with a thickness of about 0.6 mm can be changed to a magnetic sheet 61 with a thickness of about 0.3 mm.

  The extending portion 57b has a corresponding portion 57e formed in a contour along the contour of the IC 51 in a plan view of the circuit board 29, and the magnetic sheet 61 is a portion (the main sheet) formed in a contour along the contour of the corresponding portion 57e. In the embodiment, the entire magnetic sheet 61 is provided.

  Therefore, noise reduction by the magnetic sheet 61 can be reliably performed as compared with an aspect in which the extending portion 57b faces only a part of the IC 51 (this aspect is also included in the present invention). On the other hand, the extended portion 57b unnecessarily blocks the opening of the top surface of the frame body 57, thereby suppressing the merit of the two-piece shield case from being reduced.

  The extending part 57b has a beam part 57f having one end connected to the top part of the wall part 57a and the other end connected to the corresponding part 59e. Therefore, the corresponding portion 59e can be disposed at an appropriate position while suppressing the area expansion of the extending portion 57b. That is, the degree of freedom in design is high.

  The frame 57 has a hanging part 57c that hangs down from the edge of the corresponding part 57e on the electronic element 53 side to the circuit board 29 side. Therefore, it is possible to reduce the noise that intrudes from one to the other or the noise that invades each other by separating the IC 51 and the electronic element 53. In addition, since such a hanging portion 57c is suspended from the corresponding portion 57e having the same size as the IC 51, the IC 51 can be separated from the electronic element 53 within a sufficient range.

  Since the IC 51 emits a larger amount of noise than the electronic element 53, the magnetic sheet 61 concentrates and shields the electronic components 37 having a large noise among the electronic components 37 shielded by the shield case 55. As a result, noise is efficiently reduced.

  The electronic component 37 facing the extending portion 57b is the IC 51, and the electronic component not facing the extending portion 57b is the electronic element 53 constituting the receiving circuit. The IC 51 is unlikely to be replaced in the inspection or trial production, and there are few disadvantages due to the electronic component 37 being covered with the corresponding portion 57e. In addition, the corresponding portion 57e generally has a sufficient size as the attracted portion.

  The magnetic sheet 61 is formed of a material having a lower elastic coefficient than that of the material constituting the frame, and is in contact with the IC 51. Accordingly, the impact applied to the IC 51 from the shield case 55 is alleviated by the magnetic sheet 61, and thus the protection of the IC 51 is enhanced. As a result, the durability of the mobile phone 1 is improved. Note that the magnetic sheet 61 is not necessarily in contact with the IC 51.

  In the above embodiment, the mobile phone 1 is an example of the portable electronic device of the present invention, the IC 51 is an example of the first electronic component of the present invention, and each of the plurality of electronic elements 53 is the second electronic device of the present invention. It is an example of components.

(Second Embodiment)
FIG. 6 is a cross-sectional view corresponding to FIG. 4 according to the second embodiment.

  In the first embodiment, the shield case 55 is covered with the shield body 43, and the FPC 45 is placed on the shield body 43. On the other hand, in the second embodiment, a part or all of the shield body 43 is omitted, and at least a part of the FPC 45 is placed on the top surface portion 59 a of the lid body 59. A switch 47 is located on the IC 51.

  In the second embodiment, the conductive elastic member 63 is attached to the outer surface of the extending portion 57b. The elastic member 63 is made of rubber mixed with a conductive material such as metal, for example. Moreover, the elastic member 63 is formed in the sheet form which has the outline which follows the outline of the corresponding | compatible part 57e, for example. The elastic member 63 is attached to the corresponding portion 57e with, for example, an adhesive or a double-sided tape. The top surface portion 59 a of the lid body 59 is in contact with the elastic member 63.

  According to the second embodiment described above, the mobile phone has the elastic member 63 that is attached to the outer surface of the extending portion 57b and that contacts the inner surface of the lid 59. Accordingly, the impact applied to the lid 59 is absorbed by the elastic member 63, and thus the protection of the IC 51 is enhanced, and the electrical contact between the lid 59 and the extending portion 57b is enhanced, and the shield case 55 Further improvement of the shielding effect is achieved.

  In particular, when the mobile phone has the FPC 45 disposed in a stacked manner on the lid 59 and the pressing switch 47 mounted on the FPC 45, the elastic member 63 absorbs the force that presses the switch 47. And help with dispersion. From another viewpoint, the degree of freedom in designing the arrangement position of the switch 47 and the IC 51 is improved.

  The present invention is not limited to the above embodiment, and may be implemented in various aspects.

  The mobile electronic device is not limited to a mobile phone. For example, the portable electronic device may be a PDA, a digital camera, or a game machine. Further, the first and second electronic components are not limited to ICs, resistors, capacitors, and inductors.

  The shield case and the magnetic sheet may be used for suppressing noise emission, suppressing noise intrusion, or both. Any of the first and second electronic components may generate more noise. For example, the first electronic component may be an electronic component that is more preferably prevented from intruding noise than the second electronic component.

  The shape of the extending part may be set as appropriate. The extending portion may not have a corresponding portion (a portion formed in a contour along the contour of the electronic component), and the corresponding portion may not be supported by the beam portion.

  FIG. 7 is a plan view of the extending portion 257b according to the modification of the present invention.

  The extending part 257b does not have a beam part. The corresponding portion 257e formed in the contour along the contour of the IC 51 is directly connected to the inner flange 257d. Even if it is such an extension part 257b, there can exist an effect similar to the extension part 57b of embodiment.

  The hanging portion (57c) is not an essential requirement of the present invention and can be omitted. Conversely, the hanging portion may be provided not only on the edge of the corresponding portion (57e) on the second electronic component (53) side, but also on the entire circumference of the edge of the corresponding portion.

  The attaching position of the magnetic sheet is not limited to the extending portion. For example, the magnetic sheet may be attached to the inner surface of the wall portion. Further, the magnetic sheet attaching position is not limited to the inner surface of the frame. For example, the magnetic sheet may be affixed to the outer surface of the extending portion or the outer surface of the wall portion. Thus, even when the magnetic sheet is affixed to the wall or outer surface of the frame, the magnetic sheet is brought closer to the electronic component than when the magnetic sheet is affixed to the lid. Efficient noise reduction is expected.

  DESCRIPTION OF SYMBOLS 1 ... Mobile telephone (mobile electronic device), 29 ... Circuit board, 51 ... IC (1st electronic component), 55 ... Shield case, 57 ... Frame, 59 ... Cover, 61 ... Magnetic sheet

Claims (10)

A circuit board;
A first electronic component mounted on the circuit board;
A shield case mounted on the circuit board and surrounding the first electronic component; and a shield case having a lid attached to the frame body.
A magnetic sheet affixed to the frame;
Mobile electronic device having A second electronic component mounted on the circuit board;
The frame is
A wall portion standing on the circuit board and surrounding the first and second electronic components;
An extension portion extending from the top of the wall portion to a side surrounded by the wall portion and facing only the first electronic component among the first and second electronic components;
Have
The portable electronic device according to claim 1, wherein the magnetic sheet is affixed to an inner surface of the extending portion and faces the first electronic component. The extending portion has a corresponding portion formed in a contour along the contour of the first electronic component in a plan view of the circuit board,
The portable electronic device according to claim 2, wherein the magnetic sheet has a portion formed in a contour along the contour of the corresponding portion. The portable electronic device according to claim 3, wherein the extending portion has a beam portion having one end connected to the top of the wall portion and the other end connected to the corresponding portion. 5. The portable electronic device according to claim 3, wherein the frame body has a hanging portion that is suspended from an edge portion of the corresponding portion on the second electronic component side toward the circuit board. The portable electronic device according to any one of claims 2 to 5, wherein the first electronic component radiates more noise than the second electronic component. The first electronic component is an IC;
The portable electronic device according to claim 6, wherein the second electronic component is an electronic element constituting a receiving circuit. The portable electronic device according to any one of claims 2 to 7, wherein the magnetic sheet is formed of a material having a lower elastic coefficient than a material constituting the frame. The portable electronic device according to any one of claims 2 to 8, further comprising a conductive elastic member that is affixed to an outer surface of the extending portion and abutted against an inner surface of the lid. The portable electronic device according to any one of claims 2 to 9, further comprising a push-type switch disposed on the lid.

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