JP2007208149A - Mobile electronic equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce a magnetism leak to the outside without impairing the influence of a magnet on a magnetic sensor. <P>SOLUTION: Mobile electronic equipment 1 is equipped with a first case 2, a second case 3 having a display unit 33 on its front side, and a two-axial hinge 4 having two rotary shafts 41 and 44 in relation of a mutually torsional position to each other. The first case 2 is provided with the magnetic sensor 14 which detects magnetism, a magnet 51 disposed opposite the magnetic sensor 14 when the front of the second case 3 and the front of the first case 2 are put one over the other opposing each other is provided on the back side of the display unit 33 of the second case 3, and a magnetic shield 53 is provided on the back side of the magnet 51. Even if the magnet 51 producing intense magnetism detected by the magnetic sensor 14 is used with the display unit 33 interposed, the magnetic shield 53 can reduce a magnetism leak to the back side of the magnet 51. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a portable electronic device such as a cellular phone.

  A conventional mobile phone employs a biaxial hinge, the hinge part can be rotated with respect to the main body having the key operation part, and the lid body having the display screen can be rotated with respect to the hinge part. There is a foldable mobile phone in which a main body and a lid can be overlapped.

In such a cellular phone, a magnetic sensor such as a Hall element is provided on one of the main body and the lid, and a magnet is provided on the other, and the magnetic sensor and the magnet are arranged to face each other in a state where the main body and the lid are overlapped. Some of them are equipped with an open / close detection mechanism (see, for example, Patent Document 1). In a mobile phone including such an open / close sensor, a state in which the main body and the lid are overlapped is identified when the magnetic sensor detects magnetism.
JP 2005-244752 A

  By the way, in recent foldable mobile phones, there are cases where a display device or the like has to be disposed between the magnetic sensor and the magnet for reasons such as an increase in the size of the display screen.

  In particular, in a foldable mobile phone that employs a two-axis hinge, when the main body and the lid are overlapped so that the surface of the display screen faces the key operation part, the side opposite to the display screen on the key operation part side For example, if a magnet is provided in the vicinity of one surface of the lid and a magnetic sensor is provided on the body, the opposite surface is placed on the key operation unit. When facing the side, the magnet moves away from the magnetic sensor by the thickness of the lid, which may reduce the opening / closing sensitivity.

  On the other hand, if the magnetism of the magnet is increased so that the opening / closing sensitivity does not decrease, magnetic leakage to the periphery of the mobile phone increases, which may adversely affect surrounding magnetic products (such as magnetic cards).

  An object of the present invention is to reduce magnetic leakage to the outside without impairing the influence of a magnet on a magnetic sensor.

  In order to solve the above problems, the invention according to claim 1 is characterized in that the first casing, the second casing, and the first casing and the second casing are rotatably connected. In a portable electronic device that can be overlapped so that the first casing and the second casing face each other, on one of the first casing or the second casing A magnet is provided, and a magnetic sensor that detects the magnetism of the magnet is provided on the other side to face the magnet, and a magnetic shield is provided on a surface of the magnet opposite to the surface facing the magnetic sensor. It is characterized by that.

  According to the first aspect of the present invention, the magnet provided in one of the first casing or the second casing is disposed in the vicinity of the magnetic sensor provided in the other, so that the magnetic sensor detects magnetism. Then, it is possible to identify the state in which the first housing and the second housing are overlapped. Moreover, magnetic leakage to the side where the magnetic shield is provided can be prevented while maintaining the magnetism of the magnet toward the magnetic sensor.

  According to a second aspect of the present invention, there is provided a first housing, a second housing having a display device on a front surface side, and a biaxial hinge having two rotational axes that are in a twisted relationship with each other. A first rotation shaft is coupled to the first housing, the first housing is rotatably provided about an axis of the first rotation shaft, and a second rotation shaft is The second casing is connected to the second casing, and the second casing is provided so as to be rotatable about the axis of the second rotating shaft, whereby the front surface or the rear surface of the second casing is the first casing. In the portable electronic device that can be superimposed on the front surface of the casing, the first casing is provided with a magnetic sensor that detects magnetism, and the second casing on the back side of the display device. The magnetic sensor in a state where the front surface of the second housing and the front surface of the first housing face each other and overlap each other. Magnets facing each is provided on the rear side of the magnet is characterized in that a magnetic shield is provided.

  According to the second aspect of the present invention, the magnet is provided on the back side of the second housing including the display device, and the magnetic shield is provided on the back side of the magnet, so that the display device is sandwiched therebetween. Even when a magnet having strong magnetism as detected by the magnetic sensor is used, magnetic leakage to the back side of the magnet can be reduced by the magnetic shield.

  A third aspect of the present invention is the portable electronic device according to the second aspect, wherein the back surface of the display device of the second housing is connected to the back surface of the second housing and the first electronic device. A second magnet arranged to face the magnetic sensor is further provided in a state where the front surface of the housing is overlapped with the front surface.

  According to the third aspect of the present invention, the magnetic sensor detects the magnetism of the second magnet so that the back surface of the second housing and the front surface of the first housing face each other. The state can be identified.

  According to the present invention, magnetic leakage can be reduced by the magnetic shield, thereby preventing leakage of magnetism from interfering with transmission / reception of radio waves and adversely affecting surrounding magnetic products such as magnetic cards. Can do.

Hereinafter, embodiments of the present invention will be described in detail by taking a foldable mobile phone as an example.
1 and 2 are views showing an opened state of a mobile phone 1 according to an embodiment of the present invention. FIG. 1 is a perspective view as seen from the front left oblique front, and FIG. 2 is as seen from the rear right oblique rear. FIG. 3 is a cross-sectional view taken along arrow III-III in FIG.

  The mobile phone 1 according to the present embodiment is a foldable mobile phone using a biaxial hinge, and includes a main body 2, a lid 3, and a hinge portion 4. The main body 2 is connected to the hinge portion 4 at the upper end portion, and the lid body 3 is connected to the hinge portion 4 at the lower end portion.

  As shown in FIG. 3, shafts 41 and 42 arranged in the left-right direction are provided at the upper end portion of the main body 2, and a bearing 43 is rotatably attached to the shafts 41 and 42. Further, a shaft 44 arranged in the vertical direction is provided at the lower end portion of the lid 3, and the bearing 43 is attached to the shaft 44 so as to be rotatable. Therefore, the main body 2 is provided to be rotatable about the shafts 41 and 42 with respect to the hinge portion 4, and the lid 3 is provided to be rotatable about the shaft 44 with respect to the hinge portion 4.

  A key operation unit 5 is provided on one surface of the main body 2. A display screen 6 is provided on one surface of the lid 3. In FIG. 1, the key operation unit 5 of the main body 2 and the display screen 6 of the lid 3 are directed to the front.

  From the state of FIG. 1, the lid 3 and the hinge portion 4 can be rotated around the shafts 41 and 42 with respect to the main body 2, so that the lid 3 can be overlapped on the key operation portion 5 side of the main body 2. In this case, the display screen 6 of the lid 3 and the key operation unit 5 of the main body 2 are arranged to face each other. FIG. 4 is a front view showing the mobile phone 1 in this state.

  Further, from the state of FIG. 1, after the lid 3 is rotated 180 ° about the shaft 44 with respect to the hinge portion 4, the lid 3 and the hinge portion 4 are centered on the shafts 41 and 42 with respect to the main body 2. By rotating, the lid 3 can be overlapped on the front side of the main body 2 so that the display screen 6 of the lid 3 is arranged in front. In this case, the surface of the lid 3 opposite to the display screen 6 and the key operation unit 5 of the main body 2 are arranged to face each other. FIG. 5 is a front view showing the mobile phone 1 in this state.

  The cellular phone 1 according to the present embodiment is provided with an open / close detection mechanism that detects a state in which the main body 2 and the lid 3 are overlapped (closed state) and an open state. Hereinafter, in order to describe the open / close detection mechanism, the internal structure of the mobile phone 1 will be described.

  First, the main body 2 will be described. 6 is a cross-sectional view taken along the line VI-VI in FIG. 4, and FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. The main body 2 is generally composed of a front case 7, a rear case 9, a unit assembly 10, and a keypad 20.

  The front case 7 and the rear case 9 are combined to form the housing of the main body 2. The front case 7 is provided with an opening 8 through which the key top 26 of the keypad 20 is exposed. A recess for storing the battery 9a is provided at the rear of the rear case 9, and the recess for storing the battery 9a is covered with a battery lid 9b.

The unit assembly 10 generally includes a circuit board 11, a main frame 12, and a key board 13.
The circuit board 11 is provided with a main processor, a memory, a modem, a power supply IC, an antenna, a memory card slot, an IF connector, an earphone connector, and the like. The circuit board 11 is connected to the key board 13 via a flexible wiring board (not shown) provided at the end of the key board 13.

Further, the circuit board 11 is provided with a magnetic sensor 14 on the lower left side when the key operation unit 5 is disposed in front and the hinge unit 4 side is disposed upward. The magnetic sensor 14 detects the magnetism of any of magnets 51 and 52 described later provided on the lid 3. As the magnetic sensor 14, for example, a Hall element can be used. The Hall element detects that the N pole or S pole of the magnet is approaching.
This magnetic sensor 14 functions as an open / close detection sensor. That is, in the present embodiment, the mechanism for detecting the opening / closing of the lid 3 includes the magnetic sensor 14 provided on the main body 2 side and the magnets 51 and 52 provided on the lid 3 side.

  The main frame 12 is made of, for example, an Mg alloy or the like, and increases the strength of the main body, and also functions as an electrical ground or an electromagnetic wave shield (noise shield). One or more recesses are formed on the rear side of the main frame 12, and the circuit board 11 is provided on the rear side so that the main processor, memory, modem, power supply IC, etc. are stored in the recesses. It has been.

Shafts 41 and 42 are fixed to the upper end portion of the main frame 12 via bearings (not shown). The front side surface of the main frame 12 is a flat surface, and the key substrate 13 is provided on the flat surface.
The key board 13 is provided with a plurality of thin pressing switches 15 each having a movable contact and a fixed contact such as a dome switch. For example, a flexible wiring board in which a plurality of dome plate portions serving as movable contacts are formed. And a flexible wiring board having a plurality of fixed contacts formed thereon, or a single flexible wiring board is folded, so that a plurality of dome plate portions to be movable contacts are formed in one area and the other area is formed. A plurality of fixed contacts are formed, and the dome plate portion and the fixed contacts are folded so as to face each other. In this case, the flexible board that connects the key board 13 and the circuit board 11 is configured by extending a part of the flexible board that constitutes the key board 13.

The keypad 20 includes a key rubber 21 that is overlaid on the key substrate 13, and a key frame 25 and a keytop 26 that are overlaid thereon.
The key rubber 21 includes a base portion 24 and a button portion 22. A key top 26 is attached to the front surface of the button portion 22. In addition, a pressing portion 23 protruding rearward is provided at the center of the rear surface of the button portion 22. The position of the pressing portion 23 corresponds to the switch 15 on the key board 13.
A key frame 25 is provided on the front surface of the base portion 24. The key frame 25 is made of a stainless steel plate having substantially the same shape as the base portion 24 of the key rubber 21, and each button portion 22 is inserted therethrough. The key top 26 is attached to the front surface of each button portion 22 by bonding.
The key top 26 is exposed from the opening 8 of the front case 7 and becomes the key operation unit 5.

Next, the lid 3 will be described.
FIG. 8 is an exploded perspective view of the lid 3. As shown in FIG. 8, the lid 3 is generally configured by a display panel 31, a front frame 32, an LCD (Liquid Crystal Display) module 33, an LCD frame 34, a circuit board 35, and a rear case 36. ing.

The display panel 31 is transparent so that the display unit of the LCD module 33 can be seen, and protects the display unit of the LCD module 33. The outer periphery of the back surface of the display panel 31 is bonded to the front frame 32.
The LCD module 33 is housed in the LCD frame 34 and fixed by fitting the front frame 32 and the LCD frame 34 together. A flexible wiring board (FPC) 37 is provided at the upper end of the LCD module 33. An insertion hole 34 a for inserting the FPC 37 is provided at the upper end portion of the LCD frame 34, and the FPC 37 inserted into the insertion hole 34 a from the front side of the LCD frame 34 is connected to the circuit board 35 of the LCD frame 34. .
A shaft 44 is fixed to the lower end portion of the LCD frame 34 via a bearing 48.

The front frame 32 and the LCD frame 34 are fixed to the rear case 36 by screws 38 and 38. The heads of the screws 38 are covered by bonding the cover 39 to the front frame 32.
A magnetic sensor 54 (see FIG. 3) is connected to the circuit board 35 by a flexible wiring board 40. As the magnetic sensor 54, for example, a Hall element can be used as in the magnetic sensor 14. The magnetic sensor 54 is disposed at the lower end of the lid 3 and detects the magnetism of any of magnets 46 and 47 (described later) provided on the hinge 4.

The rear case 36 is provided with magnets 51 and 52 at two locations on the upper left and right when the display screen 6 is disposed in front and the hinge 4 side is disposed downward. The magnetic poles of the magnets 51 and 52 are arranged in opposite directions. For example, if the magnetic sensor 14 is a Hall element that detects the N pole, the magnet 51 has the N pole facing the LCD module 33, the S pole facing the rear case 36, and the magnet 52 has the S pole facing the LCD module 33. Further, the N pole is directed to the rear case 36 side. On the other hand, if the magnetic sensor 14 is a Hall element that detects the south pole, the magnet 51 has the south pole directed to the LCD module 33 side, the north pole directed to the rear case 36, and the magnet 52 has the north pole directed to the LCD module 33. The S pole is directed to the rear case 36 side.
The left magnet 51 is larger than the right magnet 52 and has stronger magnetism.

  A magnetic shield 53 is provided on the rear case 36 side of the left magnet 51. The magnetic shield 53 reduces the magnetism of the magnet that leaks to the outside of the rear case 36. As the magnetic shield 53, a ferromagnetic material can be used. For example, an iron nickel alloy, a ferromagnetic metal plate, for example, an iron plate, a 400 series stainless steel plate, or the like can be used.

  Although the magnet 51 has a stronger magnetism than the magnet 52, the magnetic shield 53 is provided on the rear case 36 side, so that magnetic leakage to the rear case 36 side is prevented, and the leaked magnetism is reduced to a magnetic card or the like. It can prevent the surrounding magnetic product from being adversely affected. A magnetic shield may also be provided on the rear case 36 side of the right magnet 52.

  The circuit board 35 is provided on the back surface of the LCD frame 34, and is connected to the circuit board 11 of the main body 2 via a cable 45 inserted in the center of the shafts 41 and 44.

  As shown in FIG. 3, the hinge portion 4 is provided with magnets 46 and 47 on the left and right sides of the shaft 44. The magnetic poles of the magnets 46 and 47 are arranged in opposite directions, and one of the magnets 46 and 47 has the north pole facing the lid 3 and the other has the south pole facing the lid 3. For example, when the magnetic sensor 54 is a Hall element that detects the N pole, and the N pole of the magnet 46 and the S pole of the magnet 47 are directed to the lid 3 side, the magnetic sensor 54 and the magnet 46 are arranged to face each other. When this is done, the magnetic sensor 54 detects magnetism. On the other hand, when the magnetic sensor 54 is a Hall element that detects the S pole, the magnetic sensor 54 detects magnetism when the magnetic sensor 54 and the magnet 47 are arranged to face each other. When the magnetic sensor 54 is a Hall element, one magnet is originally provided. In the present embodiment, the magnets 54 are provided on the shafts 41, 42, 43, the bearings 43, the main body 2, and the lid 3 of the hinge portion 4. Since the bearings for the shafts 41, 42, and 43 to be formed are made of ferrous metal (including an alloy), these are magnetized by the magnet 46 or 47, and the Hall element that is the magnetic sensor 54 is opposed to the magnet. Two magnets having different polarities are provided in order to completely eliminate the inconvenience of detecting the magnetism even without them.

  Next, a mechanism in which the main processor of the mobile phone 1 identifies the open / closed state of the lid 3 and the main body 2 and the orientation of the display screen 6 will be described.

  First, when the lid 3 and the main body 2 are overlaid with the key operation unit 5 and the display screen 6 facing each other, as shown in FIG. 6, the magnetic sensor 14 and the magnet 51 are connected to the LCD module. 33 are arranged opposite to each other. At this time, there is an LCD module 33 or the like between the magnetic sensor 14 and the magnet 51, which is far away, but the magnetic sensor 14 detects the magnetism of the magnet 51 because the magnet 51 has strong magnetism.

  On the other hand, in a state where the surface of the lid 3 opposite to the display screen 6 and the key operation unit 5 of the main body 2 are arranged to face each other, the magnetic sensor 14 and the magnet 52 are arranged to face each other as shown in FIG. . Although the magnet 52 is weaker than the magnet 51, the magnetic sensor 14 detects the magnet 52 because the distance between the magnetic sensor 14 and the magnet 52 is sufficiently close. Even when a magnetic shield is provided on the rear case 36 side of the right magnet 52, the magnetic sensor 14 can detect the magnetism of the magnet 52 because the distance between the magnetic sensor 14 and the magnet 52 is sufficiently close. it can.

  When the magnetic sensor 14 detects magnetism, the main processor identifies that the lid 3 and the main body 2 are superimposed.

  Whether the display screen 6 is arranged opposite to the key operation unit 5 or whether the surface opposite to the display screen 6 is arranged opposite to the key operation unit 5 is whether the magnetic sensor 54 detects magnetism. Identifies the main processor.

  For example, the magnetic sensor 54 is a Hall element that detects the N pole (S pole), and the N pole (S pole) of the magnet 46 and the S pole (N pole) of the magnet 47 are directed to the lid 3 side. The magnetic sensor 54 detects the magnetism of the magnet 46 when the magnetic sensor 54 and the magnet 46 are opposed to each other, that is, when the display screen 6 is directed to the front, and therefore the display screen 6 is directed to the front. Is identified by the main processor. On the other hand, when the magnetic sensor 54 and the magnet 47 are opposed to each other, that is, when the display screen 6 is directed to the back, the magnetic sensor 54 does not detect the magnetism of the magnet 47, so the display screen 6 is directed to the front. The main processor is not identified.

  Therefore, when the magnetic sensor 14 detects magnetism and the magnetic sensor 54 detects magnetism, the key operation part 5 of the main body 2 and the display screen 6 of the lid body 3 are arranged facing each other and folded. And the main processor identify. On the other hand, when the magnetic sensor 14 detects magnetism and the magnetic sensor 54 does not detect magnetism, the key operation unit 5 of the main body 2 and the surface opposite to the display screen 6 of the lid 3 are arranged to face each other. The main processor identifies the folded state.

  On the other hand, for example, the magnetic sensor 54 is a Hall element that detects the N pole (S pole), and the S pole (N pole) of the magnet 46 and the N pole (S pole) of the magnet 47 are directed to the lid 3 side. When the magnetic sensor 54 and the magnet 47 are disposed to face each other, that is, when the display screen 6 is directed to the back, the magnetic sensor 54 detects the magnetism of the magnet 47, so that the display screen 6 is The main processor identifies it as being directed to the back. On the other hand, when the magnetic sensor 54 and the magnet 46 are opposed to each other, that is, when the display screen 6 is directed to the front, the magnetic sensor 54 does not detect the magnetism of the magnet 46, so the display screen 6 is directed to the back. The main processor does not identify.

  Therefore, when the magnetic sensor 14 detects magnetism and the magnetic sensor 54 detects magnetism, the key operation unit 5 of the main body 2 and the surface of the lid 3 opposite to the display screen 6 are arranged opposite to each other and folded. The main processor identifies that the state has been changed. On the other hand, when the magnetic sensor 14 detects magnetism and the magnetic sensor 54 does not detect magnetism, the key operation part 5 of the main body 2 and the display screen 6 of the lid 3 are arranged opposite to each other and folded. The main processor identifies that

  As described above, the main processor can identify the positional relationship between the main body 2 and the lid 3 depending on whether or not the magnetic sensors 14 and 54 have detected magnetism.

In the above embodiment, the lid 3 is provided with the left and right two magnets 51 and 52 for detecting opening and closing, and the main body 2 is provided with the magnetic sensor 14, but the lid 3 is provided with one magnet for detecting opening and closing. The main body 2 may be provided with two left and right magnetic sensors. In this case, an MR sensor that detects the strength of the magnetic field regardless of the polarity of the magnetic pole can be used as the magnetic sensor. There is no particular problem when an MR sensor is used as the magnetic sensor, but when a Hall element is used as the magnetic sensor, it is necessary to use Hall elements having different polarities.
Further, a magnetic sensor may be provided on the lid 3 and a magnet for detecting opening / closing may be provided on the main body 2.
In addition, in a simple folding cellular phone with a single-axis hinge, one magnet and one magnetic sensor may be provided on the lid 3 or the main body 2, but when the magnet is provided on the rear case side of the lid 3. The present invention is applicable.
In the above-described embodiment, a mobile phone has been described as an example. However, the present invention can be applied to any foldable portable electronic device, for example, a notebook personal computer, a PDA (Personal Digital Assistance). The present invention may be applied to an electronic notebook or the like.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view illustrating a configuration of an embodiment of a foldable electronic device to which the present invention is applied, in a state in which a foldable mobile phone is opened. It is the perspective view which looked at the mobile telephone 1 which concerns on the front side left diagonally forward. It is the perspective view which looked at the mobile telephone 1 which concerns on this invention from the back side diagonally right back. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. FIG. 3 is a front view showing the mobile phone 1 in a state where the display screen 6 of the lid 3 and the key operation unit 5 of the main body 2 are arranged to face each other. FIG. 3 is a front view showing the mobile phone 1 in a state where the surface of the lid 3 opposite to the display screen 6 and the key operation unit 5 of the main body 2 are arranged to face each other. It is VI-VI arrow sectional drawing of FIG. FIG. 7 is a cross-sectional view taken along arrow VII-VII in FIG. 5. 3 is an exploded perspective view of a lid body 3. FIG.

Explanation of symbols

1 Mobile phone (portable electronic device)
2 Main body (first housing)
3 Lid (second housing)
4 Hinge part (hinge)
14, 54 Magnetic sensor 33 Display device 41, 42, 44 Shaft (rotating shaft)
46, 47, 51, 52 Magnet 53 Magnetic shield

Claims (3)

A first housing;
A second housing;
A hinge that rotatably connects the first housing and the second housing;
In the portable electronic device that can be overlapped so that the first housing and the second housing face each other,
A magnet is provided on one of the first casing and the second casing, and a magnetic sensor is provided on the other side to face the magnet and detects the magnetism of the magnet.
A portable electronic device, wherein a magnetic shield is provided on a surface of the magnet opposite to the surface facing the magnetic sensor. A first housing;
A second housing having a display device on the front side;
A biaxial hinge having two rotational axes in a torsional position relative to each other,
A first rotation shaft is connected to the first housing, the first housing is provided rotatably about an axis of the first rotation shaft;
The second rotating shaft is connected to the second casing, and the second casing is provided so as to be rotatable about the axis of the second rotating shaft. In a portable electronic device in which a front surface or a back surface can be superimposed on a front surface of the first housing,
The first housing is provided with a magnetic sensor for detecting magnetism,
On the back side of the display device of the second housing, the front surface of the second housing and the front surface of the first housing are opposed to each other and are disposed to face the magnetic sensor. Magnet is provided,
A portable electronic device, wherein a magnetic shield is provided on the back side of the magnet.   On the back side of the display device of the second housing, the back surface of the second housing and the front surface of the first housing are opposed to each other and are disposed to face the magnetic sensor. The portable electronic device according to claim 2, further comprising a second magnet.

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