JP2006197280A - Magnet attaching method, opening/closing detection device, and foldable mobile information terminal - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnet attaching method which easily and efficiently fixes a minute magnet of a plate type without using a double-sided tape, an opening/closing detection device, and a foldable mobile information terminal. <P>SOLUTION: The magnet attaching part 2 of the opening/closing detection device 10 is composed to be provided with a charging hole into which a tip of a magnet 11 of a magnet group 111 which consists of a plurality of magnets 11, wedge components 331, 332 which are prepared in the charging hole, rail components 33, 34, a front standing wall 21, side standing walls 22, 23, 24, an arm component stopper member 31, and an latching component 24 which latches the charged magnet 11 so as not to return. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a magnet mounting method, an open / close detection device, and a foldable portable information terminal, and more particularly to an open / close detection device for a foldable portable information terminal including a magnet, a magnetic sensor, and a magnet mounting portion. The present invention relates to a magnet mounting method, an open / close detection device, and a foldable portable information terminal that can be fixed efficiently.

2. Description of the Related Art Conventionally, some devices in which two housings are connected to each other by a hinge or the like are provided with an open / close detection device that automatically detects the opening / closing of the housing.
Usually, such an apparatus controls the operation of the apparatus based on a detection signal from the open / close detection device. For example, portable portable information terminals such as mobile phones, PDAs (Personal Information Terminals), and notebook personal computers detect the opening and closing of both housings of the display unit and the main body, and their operating states (for example, talking, Switching of the call state, lighting of the backlight of the display panel, switching of the light-off state, etc.) are automatically controlled.

(Conventional example)
Next, a folding mobile phone according to a conventional example will be described with reference to the drawings.
FIG. 9 shows a schematic perspective view of a foldable mobile phone according to a conventional example.
In the figure, a foldable mobile phone 100 includes a display unit 51 as a first housing, an operation unit 61 as a second housing, a hinge 71 connecting the display unit 51 and the operation unit 61, and a display unit. The configuration includes an opening / closing detection device 110 that detects the opening / closing of 51. The display unit 51 includes an upper case 52 and a lower case 53.

The open / close detection device 110 includes a magnet 11 and a magnetic force sensor 12. Normally, the magnet 11 is built in the display unit 51, and the magnetic force sensor 12 is built in the operation unit 61.
In the open / close detection device 110, when the display unit 51 is closed, the magnet 11 approaches the magnetic sensor 12, and the magnetic sensor 12 detects a strong magnetic force. When the display unit 51 is opened, the magnet 11 is separated from the magnetic sensor 12, so that the magnetic sensor 12 detects a weak magnetic force. That is, when the open / close detection device 110 detects a magnetic force stronger than a predetermined magnetic force, the open / close detection device 110 outputs a close signal indicating that the display unit 51 is closed, and when detecting a magnetic force weaker than the predetermined magnetic force, the display unit 51 is open. An open signal is output.

  By the way, if the magnet 11 is made small, the foldable mobile phone 100 can be reduced in weight. For this reason, the open / close detection device 110 uses a minute magnet 11 having a substantially rectangular plate shape with each side being several mm and having a plate thickness of several mm. Even when the magnetic force of the magnet 11 is reduced due to the miniaturization of the magnet 11, the magnet 11 and the magnetic force sensor 12 are arranged so that the magnetic sensor 12 can detect a magnetic force stronger than a predetermined magnetic force when the display unit 51 is closed. The distance is adjusted.

  The display unit 51 of the foldable mobile phone 100 includes an upper case 52 and a lower case 53 formed of resin, and screws 54 and 55 for fastening the cases 52 and 53 (see FIG. 10). ). Further, a screw concealment member 56 for concealing the screws 54 and 55 is attached to the upper case 52 via a double-sided tape (not shown) so that the design is not impaired by exposing the screws 54 and 55. It is attached.

  In addition, the folding mobile phone 100 opens the display unit 51 when browsing the information on the display unit 51 or making a call, and closes the display unit 51 when the browsing or the call ends. For this reason, the display unit 51 is configured such that the turning-on / off control is performed in conjunction with the folding operation. By doing so, the operability is improved and the battery life of the folding mobile phone 100 is set to be long. can do.

Next, a method for fixing the magnet 11 will be described with reference to the drawings.
FIG. 11 is a schematic enlarged perspective view for explaining a magnet fixing method of a folding cellular phone according to a conventional example.
In the figure, the magnet 11 is fixed by first projecting the lower surface of the lowermost magnet 11 in the magnet group 111 in which a large number of magnets 11 are stacked by magnetic attraction or the back surface 521 of the upper case 52. A double-sided tape 112 is affixed to the bottom surface portion 114 of the rectangular annular frame 113. Next, the magnet group 111 is lowered, and the lowermost magnet 11 is attached and fixed to the bottom surface portion 114 in the rectangular annular frame 113 projecting from the back surface 521 of the upper case 52. This was a method of sliding the remaining magnet group 111 in the F direction.

The magnet fixing method is not limited to the above-described fixing method. For example, a magnet fixing method (see Patent Document 1) in which a magnet is pressed on a punched portion or a magnet positioning member is formed on a hinge portion. And the fixing method (patent document 2) which fixes a magnet to this positioning member is disclosed.
JP 2002-263572 A JP 2004-177327 A

  However, the method of fixing the magnet 11 is likely to cause twisting or shifting of the double-sided tape 112 when the double-sided tape 112 is applied, and if it occurs, correction and re-attachment must be performed, and productivity is significantly reduced. There was a problem. That is, the operation of attaching the small double-sided tape 112 to a predetermined position is an operation that must be performed carefully even by a dexterous operator at the hand, and the general operator can easily fix the magnet 11. It was necessary to establish an attachment method for the magnet 11 that can be used.

  In addition, the mounting method using the double-sided tape 112 has a problem in that the distance between the magnet 11 and the magnetic force sensor 12 is separated by the thickness of the double-sided tape 112 and is thus restricted in design. For example, in order to avoid this restriction, if the upper case 52 of the bottom surface portion 114 is made thinner, there is a concern that the mechanical strength of the upper case 52 is lowered.

  In order to solve the above problems, the present invention provides a magnet mounting method, an open / close detection device, and a foldable portable information terminal for fixing a plate-shaped minute magnet easily and efficiently without using a double-sided tape. Objective.

In order to achieve the above object, the magnet mounting method of the present invention is a method of mounting a plate-like magnet on a magnet mounting portion of an object, and by moving a magnet group consisting of a plurality of stacked magnets, While the magnet at the tip of the magnet group is attracted by the magnetic attraction force of the magnet, the magnet is loaded from the loading port of the magnet mounting portion to the fixed position while being pulled away from the magnet group, and loaded to the fixed position. The above-mentioned magnet at the tip is locked so as not to reverse.
In this case, for example, it is not necessary to use a double-sided tape or an adhesive, and the mounting workability can be improved. Also, instead of picking the plate-shaped magnets one by one and loading them from the loading port of the magnet mounting part to the mounting position, moving the easy-to-pull magnet group in the loading direction causes the tip magnet to be separated from the magnet group. In addition, since the mounting position is inserted by the magnetic attractive force, the working efficiency can be improved.

To achieve the above object, an open / close detection device according to the present invention includes a magnet mounting portion formed on one of a first object and a second object to be opened and closed, and the other of the first object and the second object. And a plate-shaped magnet attached to the magnet attachment portion, and the magnetic sensor detects the magnetism of the magnet, thereby opening and closing the first object and the second object. An opening / closing detection device for detecting, wherein the magnet mounting portion is stacked in a state where the magnets are attracted to each other by a magnetic attraction force of the magnets, and a magnet at the tip of a magnet group composed of a plurality of the magnets is inserted. When the magnet group is moved in the loading direction, the magnet at the tip of the magnet group is pulled away from the magnet group while being attracted by the magnetic attraction force of the magnet. While mounting the magnet mounting portion A wedge member inserted from the mouth to the fixed position; a positioning member provided at a portion excluding the inlet; and a positioning member for positioning the tip magnet inserted to the fixed position; and the wedge member inserted to the fixed position A locking member that locks the magnet at the tip so as not to return backward is provided.
In this way, when the magnet group is moved in the loading direction, the wedge member causes the magnet at the tip to be separated from the magnet group, and further, due to the magnetic attractive force acting between the magnet group moving in the loading direction. The tip magnet can be inserted to the mounting position, and the working efficiency can be greatly improved.

In the open / close detection device of the present invention, the wedge member is in a state in which a magnetic attraction force for inserting the magnet at the tip to the fixed position is applied, and the magnet at the tip is separated from the magnet group. It is set as the structure which has the rail member maintained to.
Even in this case, the magnet at the tip can be inserted to the mounting position by the magnetic attractive force acting between the magnet groups moving in the loading direction, and the working efficiency can be greatly improved.

In the opening / closing detection device of the present invention, the magnet mounting portion includes a pressing member that presses the magnet at the tip inserted into the mounting position while urging it in the direction of the rail member or the positioning member. It is as.
If it does in this way, it can prevent that the magnet of the tip inserted in the attachment position rattles in the attachment position, and can fix the tip magnet easily.

In the opening / closing detection device of the present invention, the pressing member is composed of a flat plate having a leaf spring shape and a convex portion protruding from the flat plate and making point contact with the magnet at the tip.
In this way, the structure of the urging mechanism can be simplified, the frictional resistance when the tip magnet is inserted can be reduced, and the tip magnet can be easily inserted.

In the opening / closing detection device of the present invention, the magnet mounting portion includes a guide member that guides the magnet group from which the magnet at the tip is separated in the loading direction.
In this way, when the magnet group is moved along the guide member, the magnet group moves in the same direction as the loading direction. Therefore, the magnet group can be smoothly moved while maintaining a constant magnetic attraction force for loading the magnet. Can be moved to.

In the opening / closing detection device according to the present invention, the locking member is provided on a flat plate having a leaf spring shape whose both ends or one end is fixed to the first object or the second object.
In this case, the flat plate is elastically deformed, whereby the frictional resistance between the locking member and the tip magnet can be reduced, so that the tip magnet can be easily inserted.

In order to achieve the above object, a foldable portable information terminal according to the present invention comprises the open / close detection device according to any one of claims 2 to 7.
If it does in this way, even if it does not use a double-sided tape, since the magnet of an opening-and-closing detection apparatus can be attached, the freedom degree of design can be enlarged.

In the foldable portable information terminal of the present invention, the first and second objects to be opened and closed are configured as a display unit side case and an operation unit side case of the mobile phone.
If it does in this way, the magnet of an opening-and-closing detection apparatus can be easily attached to a mobile telephone.

  According to the magnet mounting method, the open / close detection device, and the foldable portable information terminal of the present invention, a plate-shaped minute magnet can be fixed easily and efficiently without using a double-sided tape.

[Open / close detection device]
FIG. 1: has shown the schematic perspective view for demonstrating the magnet attaching part of the opening / closing detection apparatus which concerns on embodiment of this invention.
Moreover, FIG. 2 has shown CC schematic expanded sectional drawing of FIG.
In FIGS. 1 and 2, the open / close detection device 10 according to the present embodiment is such that the above-described conventional example uses the double-sided tape 112 and the frame 113 to fix the magnet 11 to the back surface 521 of the upper case 52. By moving the magnet group 111 in the loading direction A, the magnet mounting part 2 for attaching the lowermost magnet 11 of the magnet group 111 is provided. Other components are almost the same as those of the conventional example.
Therefore, in FIG. 1, the same components as those in FIG. 11 are denoted by the same reference numerals, and detailed description thereof is omitted.

The magnet mounting portion 2 has one direction parallel to the back surface 521 of the upper case 52 that is a fixed surface as a loading direction A of the magnet 11. Further, the magnet mounting portion 2 is a front standing wall as a positioning member that prevents the magnet 11 inserted along the charging direction A from moving in a direction parallel to the back surface 521 (excluding the charging direction A). 21 and side upright walls 22 and 23. The front standing wall 21 and the side standing walls 22 and 23 are formed in a U shape when viewed from above, and abut the three side surfaces of the rectangular magnet 11 to position the magnet 11 in three directions. To do.
In the present embodiment, the front standing wall 21 and the side standing walls 22 and 23 are provided to prevent the magnet 11 from moving in a direction parallel to the back surface 521 (excluding the loading direction A). The shape of the member is not limited to the shape of the front standing wall 21 and the side standing walls 22 and 23.

The magnet mounting portion 2 includes a locking member 24 that locks the magnet 11 inserted up to the attachment position along the insertion direction A, and the magnet 11 inserted up to the attachment position returns in the opposite direction B. I am trying not to. The attachment position refers to a position where the inserted magnet 11 approaches or comes into contact with the front standing wall 21.
The locking member 24 protrudes substantially at the center of a flat plate 25 having a leaf spring shape. Further, the flat plate 25 is molded in a state where both ends are fixed to an opening 522 formed in the upper case 52 in a direction orthogonal to the loading direction A. In this way, when the locking member 24 is pressed by the magnet group 111, the flat plate 25 is elastically deformed downward, so that the frictional resistance between the locking member 24 and the lowermost magnet 11 can be reduced. 11 can be easily inserted. When the loaded magnet 11 passes through the locking member 24 and the pressed state is released, the flat plate 25 is restored upward, and the locking member 24 is locked to the loaded magnet 11.

Here, preferably, the locking member 24 is formed in the flat plate 25 so that the cylinder is divided in the axial direction and the axial direction coincides with the loading direction A. If it does in this way, the contact area of the latching member 24 and the magnet 11 can be made small, and the frictional resistance of the latching member 24 and the lowermost magnet 11 can be reduced effectively.
The locking member 24 and the flat plate 25 are formed integrally with an upper case 52 made of, for example, resin.

The magnet mounting portion 2 includes an arm member 31 and rail members 33 and 34 as positioning members, so that the magnet 11 loaded along the loading direction A does not move in the vertical direction perpendicular to the back surface 521. Positioning.
The arm member 31 is a leaf spring-like rectangular flat plate projecting in the opposite direction B from the lower end portion of the front standing wall 21, and the rail member while urging the magnet 11 inserted in the mounting position upward. Press against the lower surface of 33 and 34. That is, the arm member 31 functions as a pressing member. When the magnet 11 is inserted along the insertion direction A, the arm member 31 comes into contact with the lower surface of the magnet 11 and elastically deforms downward. The inserted magnet 11 is pressed upward. Thereby, the magnet 11 inserted to the mounting position is prevented from moving in the magnet mounting portion 2 according to the minute distance of each clearance (that is, the back of the magnet 11 that is stored in the mounting position). To prevent sticking.)

  Further, the lower surface of the arm member 31 is formed with a tapered surface 311 in the distal direction so that it does not protrude from the front (front) surface 523 of the upper case 52 even if the magnet 11 is inserted and elastically deformed downward. It is. The arm member 31 may have any shape that does not protrude from the front (front) surface 523 of the upper case 52 even when the magnet 11 is inserted and elastically deformed downward, and is limited to the tapered surface 311. is not.

Here, preferably, the convex portion 32 may be formed at the distal end portion of the arm member 31, and in this way, the magnet 11 to be inserted and the convex portion 32 come into contact with each other, and the contact area becomes small. Contact resistance at the time of charging can be reduced.
More preferably, the convex portion 32 is formed in, for example, a substantially hemispherical shape so that the convex portion 32 and the magnet 11 are in point contact, and in this way, the contact resistance can be further reduced.
The upper end of the arm member 31 is chamfered so that the magnet 11 is smoothly inserted.

The rail members 33, 34 are substantially quadrangular columnar rod-like members that protrude in the horizontal direction from the central side surfaces of the side standing walls 22, 23, and are lower surfaces (not shown) of the rail members 33, 34. However, it is set as the structure which latches the magnet 11 urged | biased upwards.
Further, when viewed from the loading direction A, the loaded magnet 11 has a substantially rectangular shape due to the lower surfaces of the rail members 33, 34, the side surfaces of the side standing walls 22, 23, and the tip of the arm member 31. An inlet (not shown) is formed.

The rail members 33 and 34 are formed with wedge members 331 and 332 having inclined surfaces that descend in the distal direction at the distal end on the loading side, the magnet group 111 is moved in the loading direction A, and the lowermost magnet 11 is moved. When charging into the charging port, the magnet group 111 above the lowermost magnet 11 moves obliquely upward along the slope. That is, the lowermost magnet 11 is pulled away from the magnet group 111.
In this embodiment, the rail members 33 and 34 and the wedge members 331 and 332 are provided. However, the present invention is not limited to this configuration. For example, although not shown, the rail members 33 and 34 Instead of the wedge members 331 and 332, a wedge member having a gentler slope may be formed.

  The central side surfaces 335 and 336 of the upper portions of the side standing walls 22 and 23 and the upper surfaces 333 and 334 of the rail members 33 and 34 function as guide members that move the magnet group 111 along the loading direction A. In this way, when the magnet group 111 is moved along the central side surfaces 335 and 336 and the upper surfaces 333 and 334, the magnet group 111 moves in the same direction as the loading direction A, so that magnetic attraction for loading the magnet 11 is performed. The magnet group 111 can be smoothly moved while maintaining the force constant.

Further, when the magnet group 111 is moved along the loading direction A, a magnetic attraction force acts between the separated lowermost magnet 11 and the magnet group 111, and this magnetic attraction force causes the lowermost portion of the magnet group 111 to move. The magnet 11 is inserted together with the magnet group 111 to the mounting position. That is, the thickness of the rail members 33 and 34 in the vertical direction is such a thickness that a magnetic attraction force can act between the magnet 11 and the magnet group 111 that are separated from each other.
Further, the upper surfaces 333 and 334 of the rail members 33 and 34 form the same plane as the upper surface 211 of the front standing wall 21. In this way, the magnet group 111 can be moved further rearward than the front standing wall 21 along the upper surfaces 333 and 334 and the upper surface 211, and the magnetic attractive force acting between the fixed magnets 11 can be easily obtained. Can be cut off.

Next, the operation of fixing the magnet 11 to the magnet mounting portion 2 having the above configuration will be described with reference to the drawings.
FIG. 3: has shown schematic sectional drawing for demonstrating the 1st operation | movement at the time of fixing a magnet to the magnet attaching part of the opening / closing detection apparatus which concerns on embodiment of this invention.
In the figure, a magnet group 111 composed of a plurality of magnets 11 stacked by a magnetic attractive force is placed on the back surface 521 of the upper case 52 while being pushed downward. At this time, the locking member 24 protruding from the back surface 521 is pressed downward (pressing direction D) by the elastic deformation of the flat plate 25, and the lowermost magnet 11 is inserted in the magnet mounting portion 2 (not shown). ).

  Further, the tips of the wedge members 331 and 332 are positioned at substantially the same height as the upper surface of the lowermost magnet 11, and a chamfered portion 13 is formed at a corner of the magnet 11. In this way, when the magnet group 111 is moved in the loading direction A, the tips of the wedge members 331 and 332 are inserted between the chamfered portions 13, and the lowermost magnet 11 is pulled away from the magnet group 111. Can do.

FIG. 4: has shown schematic sectional drawing for demonstrating the 2nd operation | movement at the time of fixing a magnet to the magnet attaching part of the opening / closing detection apparatus which concerns on embodiment of this invention.
In the figure, when the magnet group 111 is moved in the loading direction A while being pressed downward, the lowermost magnet 11 is loaded into the magnet mounting portion 2 from the loading port. When the magnet group 111 comes into contact with the tips of the wedge members 331 and 332, the magnet group 111 above the lowermost magnet 11 starts to rise up the slope of the wedge members 331 and 332, and the lowermost magnet 11 starts to be separated. Is done.
While the second or more magnet group 111 from the bottom is rising on the slope of the wedge members 331 and 332, the lowermost magnet 11 is loaded by the magnetic attractive force acting between the magnet group 111. It is charged in the entry direction A.

Next, when the magnet group 111 is further moved in the loading direction A, the lowermost magnet 11 comes into contact with the convex portion 32 of the arm member 31, and the arm member 31 is elastically deformed substantially downward. At this time, the arm member 31 urges the magnet 11 upward by the amount of elastic deformation, and the upper surface of the magnet 11 and the lower surfaces of the rail members 33 and 34 abut.
The lowermost magnet 11 is inserted in the insertion direction A by a magnetic attractive force acting between the magnet group 111 and this magnetic attractive force is connected to the convex portion 32 of the arm member 31. Since it is larger than the frictional resistance due to contact, the magnet 11 is smoothly inserted.

  Next, the magnet group 111 that has moved up the wedge members 331 and 332 is moved in the loading direction A while being guided by the upper surfaces 333 and 334 and the central side surfaces 335 and 336 of the rail members 33 and 34. At this time, a magnetic attractive force is applied between the lowermost magnet 11 and the magnet group 111 with a distance corresponding to the thickness of the rail members 33 and 34. This magnetic attraction force is a frictional resistance between the lower surface of the rail members 33 and 34 and the magnet 11, a frictional resistance between the convex portion 32 and the magnet 11, and a frictional resistance between the frictional resistance between the locking member 24 and the magnet 11. The power is greater than the total. For this reason, even if the lowermost magnet 11 is not pushed directly in the loading direction A, when the magnet group 111 is moved in the loading direction A, the magnetic attraction force automatically moves in the loading direction A. Is charged.

FIG. 5: has shown schematic sectional drawing for demonstrating the 3rd operation | movement at the time of fixing a magnet to the magnet attaching part of the opening / closing detection apparatus which concerns on embodiment of this invention.
In the drawing, the magnet group 111 is further moved in the loading direction A, and the lowermost magnet 11 is loaded in the loading direction A up to a position where it is in contact with the front vertical wall 21 (attachment position where the magnet 11 is mounted). Then, the locking member 24 is restored upward (locking direction E), and the rear end face of the magnet 11 is locked. In the figure, the front standing wall 21 and the magnet 11 are in contact with each other, and the locking means 24 and the magnet 11 are in contact with each other, but at least one of them is separated and there is a minute gap. Since the convex portion 32 presses the magnet 11 upward, the magnet 11 can be fixed so as not to rattle.

In addition, after the magnet 11 is locked by the locking means 24, the magnet group 111 is further moved in the loading direction A and passes through the front standing wall 21, whereby the fixing operation is finished.
When the magnet mounting portion 2 is provided in a foldable mobile phone or the like, normally, after the magnet 11 is fixed, the upper case 52 is fastened with screws 54 and 55 so as not to impair the design. Then, a screw concealment member 56 with a double-sided tape 57 is attached. Here, when the screw concealment member 56 is affixed, the locking member 24 cannot move in the pressing direction D. Therefore, the locking member 24 is pressed down by an impact, and the magnet 11 moves in the opposite direction B to move the magnet mounting portion 2. It is possible to prevent problems such as slipping out of the magnet 11 and fix the magnet 11 more firmly.

As described above, the open / close detection device 10 according to the embodiment of the present invention can easily and efficiently fix the magnet 11 to the magnet mounting portion 2 without using the double-sided tape 112, which greatly improves workability. Can be improved.
Further, the distance from the magnetic sensor 12 can be ensured as much as the double-sided tape 112 is not used, and the degree of freedom in design can be expanded.

(Application examples)
Further, the present invention is not limited to the above-described embodiment, and has various application examples.
Next, application examples will be described with reference to the drawings.
FIG. 6: has shown the schematic perspective view for demonstrating the magnet attaching part of the opening / closing detection apparatus which concerns on the application example of this invention.
In the figure, the magnet attachment part 2a is different from the above embodiment in that a flat plate 25a that is cantilevered is provided instead of the flat plate 25 that is fixed at both ends. Other components are substantially the same as those in the above embodiment.
Therefore, in FIG. 6, the same components as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted.

  The magnet mounting portion 2a is provided with an opening 522a that is widened in the opposite direction B as compared to the above embodiment. The magnet mounting portion 2a is integrally formed with a substantially rectangular flat plate 25a protruding in the loading direction A side at the end on the opposite direction B side of the opening 522a and cantilevered. It is.

Even if it does in this way, the magnet 11 inserted in the predetermined position can be fixed similarly to the magnet attachment part 2 of the said embodiment.
Further, when the magnet 11 is inserted, the frictional resistance with the locking member 24 can be easily reduced, and the magnet 11 can be inserted more smoothly.

[Folding mobile phone]
FIG. 7 is a schematic perspective view of a foldable mobile phone according to an embodiment of the present invention.
FIG. 8 is a schematic enlarged perspective view of a main part of the folding mobile phone according to the embodiment of the present invention.
7 and 8, the foldable mobile phone 1 includes the open / close detection device 10 according to the above-described embodiment, instead of the open / close detection device 110, as compared with the foldable mobile phone 100 according to the conventional example. The point is different. Other components are almost the same as those of the conventional example.
The foldable mobile phone 1 includes a case (not shown) on the display unit 51 side and a case (not shown) on the operation unit 61 side as first and second objects to be opened and closed. The configuration is as follows. In this way, the magnet 11 can be easily attached to the foldable mobile phone 1.

  As described above, according to the foldable mobile phone 1 of the present invention, the plate-like minute magnet 11 can be fixed easily and efficiently without using the double-sided tape 112. By not using it, the degree of freedom in design can be increased.

[Mounting method of magnet]
The present invention is also effective as a method for attaching a magnet. Next, the method will be described.
The magnet attachment method according to the embodiment of the present invention is a method of attaching the plate-like magnet 11 to the magnet attachment portion 2 provided in the upper case 52 on the display portion 51 side of the foldable mobile phone 1. By moving the magnet group 111 composed of the plurality of magnets 11, the magnet 11 at the tip of the magnet group 111 is attracted by the magnetic attraction force of the magnet 11, while being separated from the magnet group 111. This is a method in which the magnet 11 at the front end inserted into the fixed position from the charging inlet 2 is locked so as not to return backward.

  Specifically, first, a plurality of magnets 11 are stacked while being attracted to each other by the magnetic attraction force of the magnets 11. Next, when the magnet group 111 is moved in the loading direction with the magnet 11 at the tip of the magnet group 11 composed of the plurality of stacked magnets 11 facing the loading port, the magnet 11 at the tip is caused to have a magnetic attractive force. , The wedge members 331 and 332 provided at the loading inlet are pulled away from the magnet group 111. Subsequently, when the magnet group 111 is further moved in the loading direction, the separated magnet 11 at the tip is loaded to the mounting position by the magnetic attractive force.

  As described above, according to the magnet attachment method of the present invention, for example, it is not necessary to use the double-sided tape 112 or an adhesive (not shown), and the attachment workability can be improved. In addition, instead of picking the plate-like magnets 11 one by one and inserting them from the loading opening of the magnet mounting portion 2 to the mounting position, moving the easy-to-pick magnet group 111 in the loading direction, Since it is pulled away from the magnet group and further inserted to the mounting position by magnetic attraction, the working efficiency can be improved.

The magnet mounting method, the open / close detection device, and the foldable portable information terminal according to the present invention have been described with reference to the preferred embodiments. The magnet mounting method, the open / close detection device, and the foldable portable information according to the present invention have been described above. It goes without saying that the terminal is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention.
For example, in the above embodiment, the embodiment of the open / close detection device has been described in detail. However, the magnet mounting method and the embodiment of the folding mobile phone are also the same as the embodiment of the open / close detection device.
Further, the opening / closing operation of the portable information terminal is not limited to the folding operation by the hinge 71 or the like. For example, a sliding type, a rotary type (revolver type, etc.), a universal type (two or more rotating parts are installed) Open / close operations such as those having the same).

  The magnet mounting method, open / close detection device, and foldable portable information terminal of the present invention are extremely suitable for fixing a plate-shaped minute magnet, but are not limited to the shape or size of the magnet. . For example, it can be suitably used as a magnet attachment method with a broader concept in which a magnet to be attached is moved to a predetermined position and attached by the action of a magnetic attractive force.

The schematic perspective view for demonstrating the magnet attaching part of the opening / closing detection apparatus which concerns on embodiment of this invention is shown. FIG. 2 is a schematic enlarged cross-sectional view taken along a line CC in FIG. 1. The schematic sectional drawing for demonstrating the 1st operation | movement at the time of fixing a magnet to the magnet attaching part of the opening / closing detection apparatus which concerns on embodiment of this invention is shown. The schematic sectional drawing for demonstrating the 2nd operation | movement at the time of fixing a magnet to the magnet attaching part of the opening / closing detection apparatus which concerns on embodiment of this invention is shown. The schematic sectional drawing for demonstrating the 3rd operation | movement at the time of fixing a magnet to the magnet attaching part of the opening / closing detection apparatus which concerns on embodiment of this invention is shown. The schematic perspective view for demonstrating the magnet attaching part of the opening / closing detection apparatus which concerns on the application example of this invention is shown. 1 shows a schematic perspective view of a foldable mobile phone according to an embodiment of the present invention. 1 shows a schematic enlarged perspective view of a main part of a foldable mobile phone according to an embodiment of the present invention. The schematic perspective view of the folding-type mobile phone which concerns on a prior art example is shown. The general | schematic expansion perspective view of the principal part of the foldable mobile telephone which concerns on a prior art example is shown. The schematic expanded perspective view for demonstrating the fixing method of the magnet of the foldable mobile telephone which concerns on a prior art example is shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Folding-type mobile phone 2, 2a Magnet attaching part 10 Opening / closing detection apparatus 11 Magnet 12 Magnetic force sensor 13 Chamfering part 21 Front standing wall 22, 23 Side standing wall 24 Locking member 25, 25a Flat plate 31 Arm member 32 Convex parts 33, 34 Rail member 51 Display unit 52 Upper case 53 Lower case 54, 55 Screw 56 Screw concealment member 57 Double-sided tape 61 Operation unit 71 Hinge 100 Folding mobile phone 110 Opening / closing detection device 111 Magnet group 112 Double-sided tape 113 Frame 114 Bottom surface 311 Taper Surfaces 331 and 332 Wedge members 335 and 336 Central side surfaces 333 and 334 Upper surface 521 Rear surface 522 and 522a Opening 523 Front (front) surface

Claims (9)

A method of attaching a plate-like magnet to a magnet attachment part of an object,
By moving a magnet group composed of a plurality of the magnets stacked, the magnet mounting portion is pulled away from the magnet group while the magnet at the tip of the magnet group is attracted by the magnetic attraction force of the magnet. From the charging entrance to the fixed position,
The magnet mounting method, wherein the tip magnet inserted to the fixed position is locked so as not to reverse. A magnet mounting part formed on one of the first object and the second object to be opened and closed, a magnetic sensor attached to the other of the first object and the second object, and a plate attached to the magnet mounting part An open / close detection device that detects opening and closing of the first object and the second object by detecting the magnetism of the magnet.
The magnet mounting portion is
An inlet into which the magnets at the tips of the plurality of magnets stacked in a state of being attracted to each other by the magnetic attraction force of the magnets are inserted;
When the magnet group is provided in this charging port and moved in the loading direction, the magnet at the tip of the magnet group is attracted by the magnetic attraction force of the magnet while being separated from the magnet group, A wedge member inserted from the inlet of the magnet mounting portion to the fixed position;
A positioning member that is provided in a portion excluding the charging port and positions the tip magnet inserted to the fixed position;
An opening / closing detection device comprising: a locking member that locks the magnet at the tip inserted to the fixed position so as not to reversely move back.   The wedge member includes a rail member that maintains the tip magnet in a state of being separated from the magnet group in a state in which a magnetic attraction force is applied to insert the tip magnet to the fixed position. The open / close detection device according to claim 2.   The said magnet attaching part was equipped with the pressing member which presses down the magnet of the said front-end | tip inserted in the said attachment position, urging | biasing in the direction of the said rail member or a positioning member. Open / close detection device.   5. The open / close detection device according to claim 4, wherein the pressing member includes a flat plate in the form of a leaf spring and a convex portion protruding from the flat plate and making point contact with the magnet at the tip.   The opening / closing detection device according to any one of claims 2 to 5, wherein the magnet mounting portion includes a guide member that guides the magnet group from which the magnet at the tip is separated in the loading direction. .   The said locking member is provided in the leaf | plate spring-shaped flat plate by which the both ends or one end was fixed to the said 1st object or the 2nd object, The any one of Claims 2-6 characterized by the above-mentioned. Open / close detection device.   A foldable portable information terminal comprising the open / close detection device according to any one of claims 2 to 7.   9. The foldable portable information terminal according to claim 8, wherein the first and second objects to be opened and closed are a display unit side casing and an operation unit side casing of a mobile phone.

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