JP2004336101A - Magnetic driver and portable information terminal with camera employing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a magnetic driver built in a thin casing of a portable telephone or the like and capable of driving an opening / closing door covering or opening a camera member exposed from an opening. <P>SOLUTION: When power is supplied to a coil C1 and an unlock coil C2 at the same time, a lock member 24 is first attracted by yokes 21a, 21b by a magnetic field B1 and a locking state is released, and thereafter a slide member 15 is moved in a direction Y1 by a magnetic field of a magnet M intersecting the coil C1. When the power is interrupted, the attractive force by the yokes 21a, 21b is lost and the lock member 24 is restored to the lock state by the attracting force of the magnet M. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a thin magnetic drive device having a lock mechanism, and more particularly to a portable information terminal with a camera that can open and close an opening where a camera lens is exposed by the magnetic drive device.
[0002]
[Prior art]
2. Description of the Related Art In recent years, there is a tendency that many types of mobile information terminals such as mobile phones equipped with a camera function are commercially available. In this type of camera, an opening is formed in a housing, and a lens of the camera is exposed from the opening.
[0003]
As portable information terminals with cameras have become widespread, various problems associated with exposing the lenses of the cameras have been occurring. One is that dust easily adheres to the lens and the lens is easily scratched. The other is that the act of stealing and photographing people and things is becoming widespread. By closing the opening and not exposing the lens, it is possible to notify a third party that no image is being captured.
[0004]
Therefore, as disclosed in Patent Documents 1 and 2 below, for example, a cover that covers a lens of a camera is proposed to solve the above problem. The cover described in Patent Literature 1 is provided with a plate material bent in a U-shape, and slidably supports between a closed state covering the camera and an open state exposing the camera so as to sandwich the housing with the plate material. Things. The cover disclosed in Patent Literature 2 is configured such that a projection is provided at each end of a plate material bent and formed in a U-shape, and the plate material is attached to a recess formed in the housing so as to be freely fitted.
[0005]
[Patent Document 1]
JP 2001-309003 A
[Patent Document 2]
JP-A-2002-271665
[0006]
[Problems to be solved by the invention]
However, each of Patent Documents 1 and 2 has a shape in which a plate-shaped member formed of a synthetic resin or the like is covered from the outside of the housing of the mobile phone, so that the thickness dimension and the like are increased and the mobile phone is not portable. Sex is impaired. In addition, there is a problem that the member is exposed to the outside of the mobile phone, and the external appearance is impaired.
[0007]
Further, in the technique disclosed in Patent Document 1, it is necessary to provide an area where the cover in the open state is located on the side of the camera lens exposed from the housing. For this reason, it is necessary to displace a member exposed to the outside of the housing, for example, a speaker or the like. Further, a locking means for locking the cover in each of the open state and the closed state is required. Further, since the cover disclosed in Patent Literature 2 has a detachable cover, the cover may fall off and be lost.
[0008]
The present invention solves the above-mentioned conventional problems, and provides a magnetic drive device that can be built in a small and thin housing and has a lock mechanism, and a portable information terminal with a camera using the magnetic drive device. The purpose is to do.
[0009]
[Means for Solving the Problems]
The present invention provides a plate-shaped movable element, a fixed portion that supports the movable element linearly reciprocally between a first position and a second position along the plate surface, and the movable element. A first magnetic drive unit for moving the first and second positions to the first position and the second position,
In the first magnetic driving means, one of the mover and the fixed portion has a coil having a current path in which a current flows in a direction intersecting the moving direction of the mover, and the other has a magnet opposed to the current path. Is provided, and the mover can be driven to the first position and the second position according to a direction of a current supplied to the current path,
A lock means for locking the mover when the mover reaches at least one of the first position and the second position is provided.
[0010]
For example, the coil has a first current path and a second current path to which currents are applied in opposite directions when the coil is energized, and a surface of the magnet facing the coil is a first surface. And two magnetized surfaces magnetized to different poles on the position side and the second position side. When the mover is in the first position and the second position, the first Is always opposed to one magnetized surface, and the second current path is always opposed to the other magnetized surface.
[0011]
In the magnetic drive device of the present invention, since the mover, the fixed portion, the coil and the magnet can be arranged with a reduced thickness, the device can be made small and thin.
[0012]
Further, the lock means has a lock member and a second magnetic drive means,
A coil is provided on the mover, and a magnet is provided on the fixed portion. When the mover reaches at least one of the first position and the second position, the lock member is operated by a magnetic field from the magnet. Thus, the movable element can be locked, and the movable element can be operated in the unlocking direction against the magnetic field of the magnet by the second magnetic driving means.
[0013]
As a result, the lock state can be set when no power is supplied, so that the mover does not operate carelessly and power can be saved.
[0014]
The second magnetic driving means is provided with a coil for unlocking, and the unlocking coil is connected to the coil of the first magnetic driving means. The mass is smaller than that of the child, and when the coil of the first magnetic drive means and the coil for unlocking are commonly energized, the lock member having a smaller mass operates first to release the lock, and thereafter, It is preferable that the mover be configured to be able to move.
[0015]
Since the coil of the first magnetic drive means and the coil of the second magnetic drive means can be energized simultaneously, the control can be simplified. Further, both coils can be formed by winding one coil.
[0016]
Further, a portable information terminal with a camera according to the present invention, wherein the magnetic drive device according to any one of claims 1 to 4 incorporated in a housing, an imaging member exposed from an opening formed in the housing, An opening / closing door that is connected to the mover and that is moved between an open position where the imaging member is exposed to open the opening and a closed position where the imaging member is covered and the opening is closed; The door is set to an open position when the child reaches one position, and the door is set to a closed position when the movable element reaches the other position. .
[0017]
By mounting the magnetic drive device on a portable information terminal with a camera, unnecessary irregularities are not formed on the external appearance, so that portability is not impaired, and there is no risk of parts falling off. Also, the camera lens surface can be effectively protected.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is a side view showing an example of the internal structure of a mobile phone which is one of portable information terminals. FIG. 2 is a plan view showing the door in an open state and a locked state. FIG. 4 is a plan view showing the unlocked state, FIG. 4 is a plan view showing the unlocked state with the door closed, and FIG. 5 is a plan view showing the locked state with the door closed. 6 is a partial sectional view taken along line 6-6 in FIG. 2, and FIG. 7 is a circuit diagram of a coil of the first magnetic drive unit and a coil of the second magnetic drive unit.
[0019]
In a mobile phone 10 shown in FIG. 1, a housing 2a provided with an operation unit 5 and a housing 2b provided with a display unit 6 are rotatably connected by a hinge 9, and the operation unit 5 and the display unit are provided. 6 is a type that can be folded in two so as to face each other. Further, a photographing unit 3 is built in one housing 2a, and the photographing unit 3 is arranged at a position exposed from an opening 2a1 formed in the housing 2a. The opening 2a1 has an elliptical shape as shown in FIG.
[0020]
As shown in FIG. 2, the imaging unit 3 has an imaging member (camera) 3a and a lighting member 3b provided in parallel in the X direction, and each member 3a, 3b is exposed from the opening 2a1. The imaging member 3a includes, for example, a CCD (Charge Coupled Device) for converting light into an electric signal, an optical member such as a lens, and a protective plate made of synthetic resin, which are provided in this order from the back side. The illumination member 3b is formed of a light emitting element that emits light when photographing with the imaging member 3a and can illuminate the photographing target brightly.
[0021]
Note that the photographing unit 3 may be an element capable of photographing only a still image or a device capable of photographing both a still image and a moving image. The illumination member 3b is not limited to a light that continuously emits light, and may be a strobe that emits light only during shooting. The illumination member 3b may be a mirror-finished surface.
[0022]
As shown in FIG. 2, the mobile phone 10 has an opening / closing door 11 that can cover the entire opening 2a1, and a magnetic drive device 12 that drives the opening / closing door 11. The opening / closing door 11 has an elliptical shape that can cover the entire opening 2a1, and can cover and hide both the imaging member 3a and the lighting member 3b. As shown in FIG. 1, the opening / closing door 11 and the magnetic drive device 12 are respectively provided along the back surface 2a2 of the housing 2a.
[0023]
As shown in FIG. 6, the magnetic drive device 12 includes a lower cover 13, an upper cover (fixed portion) 14, and a slide member (movable element) 15. The lower cover 13 and the upper cover 14 are each formed of a thin plate-shaped member. The lower cover 13 is formed with bent pieces 13a, 13a (one of which is not shown) in which each end on the X1 side and the X2 side is bent toward the vertical Z1 side, and the upper cover 14 is formed on the X1 side. And bent pieces 14a, 14a (one not shown) of which each end on the X2 side is bent to the vertical Z2 side are formed, and the bent pieces 14a, 14a of the upper cover 14 They are stacked so as to be located inside the bent pieces 13a, 13a. Thus, a space 16 having a small size in the Z direction is formed between the lower cover 13 and the upper cover 14. The lower cover 13 and the upper cover 14 are both made of a magnetic material such as iron (Fe) or ferrite.
[0024]
The movable and slidable sliding member 15 of the present embodiment is formed by bending a thin plate made of a nonmagnetic material, and the X1 end and the X2 end are L-shaped. It has guide pieces 15a, 15a bent outward. In FIG. 6, one guide piece 15a is bent toward the X2 side, and the other guide piece 15a (not shown) is bent toward the X1 side. The tip of the guide piece 15a formed in this way is inserted into the guide hole 14a1 formed in the upper cover 14, and the slide member 15 is slidably supported in the Y1-Y2 direction.
[0025]
As shown in FIGS. 2 and 6, a thin plate-shaped and rectangular magnet M is fixed to the inner surface of the upper cover 14 closer to the X1 side than the center in the X direction. As shown in FIG. 2, in the present embodiment, the magnet M has a magnetized surface Mn in which the Y1 side is magnetized to the N pole from the center in the Y direction, and the magnetized surface is magnetized to the S pole on the Y2 side. Ms is formed. The magnet M is formed by screen printing, tampon printing, or the like using, for example, an Sm—Fe—N-based rare earth nitride magnet.
[0026]
As shown in FIGS. 2 and 6, the slide member 15 is provided with a coil C1 on the side facing the magnet M. The coil C1 is formed in a ring shape by winding it in a direction parallel to the surface of the magnet M with a copper wire or the like. In the coil C1, a first current path C1a and a second current path C1b are formed, which flow in opposite directions in a vertical direction crossing the moving direction of the slide member 15.
[0027]
In the magnetic drive device 12 of the present embodiment, the position of the slide member 15 shown in FIGS. 2 and 3 is the storage position where the first position is the first position, and the position shown in FIGS. 4 and 5 is the second position. Is the protruding posture. When the slide member 15 is in the storage position, which is the first position, or moves from the first position to the protrusion position, which is the second position, the first current path C1a of the coil C1 is The second current path C1b is set so as to always face the magnetized surface Ms while always facing the magnetized surface Mn of the magnet M.
[0028]
In the present embodiment, the coil C1, the magnet M, the slide member 15, and the upper cover 14 constitute a first magnetic drive unit.
[0029]
As shown in FIGS. 2 and 6, a plate-shaped core member 20 is provided at the end of the slide member 15 on the Z1 side on the X2 side. Around the core member 20, there is provided an unlocking coil C2 formed by winding a wire made of a copper wire or the like a plurality of times. The core member 20 projects in the Y1 direction and the Y2 direction with respect to the unlocking coil C2, and is formed in an L-shape at each of the projecting ends 20a and 20b of the core member 20. The base ends of the yokes 21a and 21b are fixed to the slide member 15 by screws 22a and 22b. At this time, the shape formed by the core member 20 and the yokes 21a and 21b when viewed in the XY plane is a C-shape, and a gap 23 is formed in a facing portion between the tip of the yoke 21a and the tip of the yoke 21b. Is formed. In the present embodiment, the core member 20 and the yokes 21a and 21b are formed separately, but may be formed integrally.
[0030]
An L-shaped lock member 24 is provided on the slide member 15. The lock member 24 is formed to extend in the Y1 direction from the Y2 side edge of the slide member 15, and the base end of the slide member 15 is rotatably supported by a shaft 25. At the tip of the lock member 24, a suction piece 24a having an edge on the X2 side bent toward the Z2 side is formed to face the yokes 21a and 21b. Further, a lock piece 24b bent toward the Z1 side opposite to the suction piece 24a is formed at the edge of the tip of the lock member 24 on the X1 side, and the lock piece 24b is formed on the upper cover 14. Projected from the lock hole 26.
[0031]
As shown in FIG. 2, the lock hole 26 is elongated in the Y direction, and has lock recesses 26a and 26b protruding in the X1 direction on the Y1 side and the Y2 side of the hole. The length of the lock recesses 26a and 26b in the Y direction is substantially the same as the length of the lock piece 24b in the Y direction, and the lock piece 24b can enter the lock recesses 26a and 26b. It has become.
[0032]
In the present embodiment, the second magnetic drive means is constituted by the core member 20, the yokes 21a and 21b, and the unlocking coil C2.
[0033]
As shown in FIG. 7, the coil C1 and the unlocking coil C2 are formed as circuits connected in parallel. The coils C1 and C2 may be formed by combining two conductive wires, or may be formed by one conductive wire. This circuit can be controlled by a control unit (not shown) so that currents Ia and Ib in opposite directions can be supplied.
[0034]
Next, the operation of the magnetic drive device 12 will be described.
In the state shown in FIG. 2, the slide member 15 is at the first position where the slide member 15 is entirely housed in the space 16 between the lower cover 13 and the upper cover 14. In the first position, the lock member 24 is rotated clockwise about the shaft 25 by the attraction force generated from the side surface m1 of the magnet M (see FIGS. 2 and 6). The formed lock piece 24b is inserted into the lock recess 26a on the Y2 side of the slide hole 25. For this reason, the slide member 15 is regulated so as not to slide in the Y1 direction.
[0035]
In the state shown in FIG. 2, when a current I is applied to the coil C1, at the same time, a magnetic field in the direction indicated by reference numeral B1 is generated in the core member 20 and the yokes 21a and 21b in the unlocking coil C2. Current is provided. Since the gap 23 is formed between the yoke 21a and the yoke 21b in the magnetic field B1 generated at this time, the magnetic field B1 passes through the lock member 24 from the yoke 21a as shown by an arrow in FIG. The yoke 21b is formed. Thus, the suction piece 24a of the lock member 24 formed to face the yokes 21a and 21b is sucked toward the yokes 21a and 21b, and the lock piece 24b of the lock member 24 comes out of the lock recess 26a and the lock is released. You.
[0036]
On the other hand, when the current Ia is applied to the coil C1, in the first current path C1a facing the magnetization surface Mn, the current flows in the X1 direction, and the second current path C1b facing the magnetization surface Ms. Then, it becomes the X2 direction. Also, in the first current path C1a, a downward magnetic field penetrating from the Z1 direction to the Z2 direction is generated by the magnetized surface Mn of the magnet M, and in the second current path C1b, the magnetized surface Ms generates the downward magnetic field. , An upward magnetic field penetrating in the Z1 direction is generated. Therefore, in the relationship between the direction of the current Ia and the direction of the magnetic field B1 with respect to the coil C1, the force F1 acts in the Y1 direction on the first current path C1a of the coil C1 according to the Fleming's left hand rule. In the current path C1b, the force F2 acts in the Y1 direction, and as a result, the slide member 15 is moved in the Y1 direction by the force (F1 + F2).
[0037]
It should be noted that current is applied to the coil C1 and the unlocking coil C2 at the same time, but in the present embodiment, the mass of the lock member 24 and the mass of the slide member 15 are smaller than the mass of the lock member 24. Is smaller, the inertia of the lock member 24 becomes smaller than the inertia of the slide member 15, the lock member 24 is unlocked first, and then the slide member 15 is operated.
[0038]
Then, as shown in FIG. 4, the lock member 24 is moved to the end on the Y1 side of the lock hole 26, and the lock member 24 is restricted from further moving in the Y1 direction. When this state is reached, the energization of the coil C1 and the unlocking coil C2 is released. At this time, the magnetic field B1 generated in the core member 20 and the yokes 21a and 21b disappears, and the magnet M The lock member 24 is rotated clockwise by the suction force generated from the side surface m1, and the lock piece 24b is inserted into the lock recess 26b, and the lock state shown in FIG. 5 is obtained. As a result, the slide member 15 is locked in the protruding posture, which is the second position.
[0039]
When returning the slide member 15 from the second position to the first position, in the state shown in FIG. 5, a current in the opposite direction is applied to the coil C1 and the unlocking coil C2. . At this time, a magnetic field B2 in the direction shown in FIG. 4 is generated in the core member 20 and the yokes 21a and 21b, and the attracting piece 24a of the lock member 24 is attracted to the yokes 21a and 21b. The lock piece 24b comes out of the lock recess 26b.
[0040]
Then, in the first current path C1a, a current flows in the X2 direction, a force F3 directed to the Y2 side acts on the first current path C1a in the same manner as described above, and in the second current path C1b, the X1 direction. , A force F4 directed toward the Y2 side acts on the second current path C1b, and the slide member 15 is moved in the Y2 direction by the force (F3 + F4).
[0041]
The magnetic field B2 generated when a current is applied to the unlocking coil C2 is opposite to the magnetic field B1 generated when a current is applied to the unlocking coil C2. The lock member 24 can be sucked regardless of the direction of B2. Therefore, the slide member 15 is moved between the first position (storage posture) and the second position (projection posture) without controlling the coil C1 and the unlocking coil C2 by separate circuits. The sliding member 15 can be locked at each position (at each position).
[0042]
The lock piece 24b is moved in the lock hole 26 in the Y2 direction, and is moved to the end on the Y2 side. Then, the energization to the coils C1 and C2 is released, the magnetic field generated in the yokes 21a and 21b disappears, and the lock member 24 is drawn by the attraction force of the side surface m1 of the magnet M, and the slide member 15 is locked. You.
[0043]
In the present embodiment, the magnetic drive device 12 can be used by being mounted on the mobile phone 10. However, the magnetic drive device 12 can be used by opening and closing the photographing unit 3 by the opening and closing door 11 connected to the slide member 15. It can be driven between.
[0044]
A connection arm 30 is fixed to the slide member 15 provided on the magnetic drive device 12 at the edge on the Y1 side using screws 31, 31. The connection arm 30 has a shape that is inclined in the X1 direction toward the tip. A pair of elongated plate members 32 and 33 are provided in front of the connection arm 30 so as to cross each other. A connection rotation shaft 34 is fixed to the one plate member 32 and the other plate member 33 is provided. Is formed with an elongated hole 33a into which the connecting rotation shaft 34 is slidably inserted. The base ends of the plate members 32 and 33 are rotatably supported by fixed shafts 35 and 36 fixed to the housing of the mobile phone 10.
[0045]
The opening / closing door 11 has a shape capable of covering the whole of the photographing unit 3 and has a guide groove 37 extending linearly in the X direction toward the Y2 side on the rear surface thereof. Guide shafts 38, 39 fixed to the tips of the plate members 32, 33 are slidably inserted into the guide grooves 37, respectively.
[0046]
A shaft 30a is fixed to a tip of the connection arm 30, and the shaft 30a is rotatably connected to the plate 32. Therefore, in the open position shown in FIG. 2, when the slide member 15 is moved in the Y1 direction, the plate member 32 moves in a counterclockwise direction around the fixed shaft 35 in cooperation with the plate member 32. 33 is rotated clockwise about the fixed shaft 36, and the guide shafts 38 and 39 are moved in the guide groove 37 in directions approaching each other and away from each other. As shown in (2), the opening / closing door 11 is shifted to a closed posture covering the entire photographing unit 3 exposed from the opening 2a1.
[0047]
When the slide member 15 is moved from the second position (projection position) to the first position (storage position), the plate member 32 is rotated clockwise and the plate member 33 is rotated counterclockwise. At the same time, the guide shafts 38, 39 are moved toward and away from each other in the guide groove 37, and the opening / closing door 11 shifts to an open position in which the entire photographing unit 3 is exposed from the opening 2a1. Let me do.
[0048]
As described above, in the present embodiment, since the magnetic drive device 12 can be formed to have a small thickness, the magnetic drive device 12 can be built in a thin housing such as the mobile phone 10, and the opening / closing door 11 is provided outside the housing 2a. Does not protrude.
[0049]
8 and 9 are plan views showing a magnetic drive device according to a second embodiment of the present invention. FIG. 8 shows a closed position, and FIG. 9 shows an open position. FIGS. 8 and 9 show the mobile phone 10 in a folded state, respectively, and are plan views when the mobile phone 10 is viewed through the inside from the side of the housing 2b on which various operation units 5 are provided. In the mobile phone 10 of the present embodiment, only the imaging member 4 is built in the housing 2a, and the imaging member 4 is exposed from a circular opening provided in the housing 2a. . In the present embodiment, the configuration of the first magnetic drive unit, the second magnetic drive unit, and the like for driving the opening / closing door 40 are the same as those described above, and thus the same reference numerals are given and the description is omitted. .
[0050]
The mobile phone 10 of the present embodiment is provided with an opening / closing door 40 that can cover the imaging member 4. The opening / closing door 40 includes a circular circular portion 40a capable of covering the opening and an arm portion 40b extending in one direction from the circular portion 40a. The base end of the arm 40b is rotatably supported by a fixed shaft 41 fixed to the housing 2a.
[0051]
A plate-shaped connecting arm 42 is connected to the slide member 15 by screws 43. A connection shaft 42a is fixed to the connection arm 42, and the connection shaft 42a is slidably inserted into an elongated hole 40c formed in the arm portion 40b to be short in the longitudinal direction.
[0052]
The opening / closing door 40 is provided with a tension coil spring 44. One end of the tension coil spring 44 is hooked to the housing 2a, and the other end is hooked to the arm portion 40b. It is set in a state of being biased in the circumferential direction. When the camera function of the mobile phone 10 is not turned on, the opening / closing door 40 is rotated clockwise around the fixed shaft 41 as a fulcrum by the elastic contraction force of the extension coil spring 44, and is exposed from the opening 2a1. The imaging member 4 is completely covered and is in a closed posture.
[0053]
For example, when the camera function is set to ON on the menu screen displayed on the display unit 6 of the mobile phone 10, the slide member 15 is moved in the Y2 direction by the driving force of the magnetic drive device 12. The connecting arm 42 connected to 15 is moved in the Y2 direction, the connecting shaft 42a is moved from one end to the other end in the elongated hole 40c, and the door 40 shifts to the open position. FIG. 9 shows this state.
[0054]
At the time of transition from the state shown in FIG. 8 to the state shown in FIG. 9, when the current Ic is applied to the coil C1, the lock piece 24b comes off the lock recess 26, and the first current path C1a and the second current path C2 of the coil C1. The forces F5 and F6 act on the current paths C1b, respectively, to move the door 40 in the Y2 direction while repelling the elastic return force of the extension coil spring 44. When the lock piece 24b of the lock member 24 is moved to the position of the lock recess 26a, the energization state of the unlocking coil C2 and the coil C1 is released, and the suction pieces 24a of the lock member 24 by the yokes 21a and 21b are sucked. The lock member 24 is locked by the suction force of the magnet M, and the lock piece 24b enters the lock recess 26a by the suction force of the magnet M.
[0055]
As shown in FIG. 9, the opening / closing door 40 is restricted from returning in the Y1 direction by the lock piece 24b of the lock member 24 being located in the lock recess 26a. However, in addition to the mechanism of the lock piece 24b and the lock recess 26a, another lock mechanism may be provided.
[0056]
In addition, a current in a direction opposite to the current Ic flows through the coil C1, so that the sliding member 15 exerts a moving force in the Y1 direction. Also in the present embodiment, as shown in FIG. 7, even if a current in both directions is applied to the unlocking coil C2, an attraction force for attracting the lock member 24 to the yokes 21a and 21b is generated. Can be
[0057]
In each of the above-described embodiments, a case is described in which an opening / closing door for opening and closing a camera lens provided in a camera-equipped mobile phone is driven, but the invention is not necessarily limited to this. Needless to say, the present invention can be applied to other portable information terminals such as a PDA (Personal Digital Assistance) with a camera.
[0058]
【The invention's effect】
According to the present invention described above, it can be formed small and thin, and can be locked at each of the first position and the second position. Further, an opening / closing door capable of covering a camera portion and a mechanism for driving the door can be incorporated in a thin housing such as a camera-equipped mobile phone.
[Brief description of the drawings]
FIG. 1 is a side view showing an example of an internal structure of a mobile phone according to a first embodiment;
FIG. 2 is a plan view showing a state where the opening and closing door is open and locked.
FIG. 3 is a plan view showing a state where the door is in an open state and an unlocked state.
FIG. 4 is a plan view showing an unlocked state when the door is closed.
FIG. 5 is a plan view showing a locked state when the door is closed.
FIG. 6 is a partial cross-sectional view taken along line 6-6 in FIG. 2;
FIG. 7 is a circuit diagram of a first coil and a second coil.
FIG. 8 is a plan view of the mobile phone according to the second embodiment when the door is in a closed position;
FIG. 9 is a plan view showing the mobile phone of the second embodiment when the door is in an open position;
[Explanation of symbols]
C1 coil
C1a First current path
C1b Second current path
C2 Lock release coil
M magnet
Mn, Ms magnetized surface
2a housing
2a1 opening
3 Shooting unit
3a, 4 imaging member
10 Mobile phone
11 Opening / closing door
12 Driver
13 Lower cover
14 Upper cover (fixed part)
15 Slide member (movable element)
20 core members
21a, 21b yoke
23 gap
24 Lock member
24a adsorption piece
24b Lock piece
26 Lock hole
26a, 26b Lock recess

Claims (5)

A plate-like movable element, a fixed portion for supporting the movable element linearly reciprocally movable between a first position and a second position along a plate surface thereof, and And a first magnetic driving means for moving to a second position and a second position,
In the first magnetic driving means, one of the mover and the fixed portion has a coil having a current path in which a current flows in a direction intersecting the moving direction of the mover, and the other has a magnet opposed to the current path. Is provided, and the mover can be driven to the first position and the second position according to a direction of a current supplied to the current path,
A magnetic drive device comprising: a lock unit that locks the mover when the mover reaches at least one of the first position and the second position. The coil has a first current path and a second current path to which currents are applied in opposite directions when the coil is energized, and a surface of the magnet facing the coil has a first position. And two magnetized surfaces magnetized to different poles on the side and the second position side, and when the mover is in the first position and the second position, the first current 2. The magnetic drive device according to claim 1, wherein the path always faces one magnetized surface, and the second current path always faces the other magnetized surface. The lock unit has a lock member and a second magnetic drive unit,
A coil is provided on the mover, and a magnet is provided on the fixed portion. When the mover reaches at least one of the first position and the second position, the lock member is operated by a magnetic field from the magnet. 3. The magnetic drive device according to claim 1, wherein the movable element is locked, and the movable element is moved in a lock release direction against the magnetic field of the magnet by the second magnetic drive unit. 4. An unlocking coil is provided in the second magnetic driving means, and the unlocking coil and the coil of the first magnetic driving means are connected to each other. When the coil of the first magnetic drive means and the coil for unlocking are energized in common, the lock member having a low mass operates first to release the lock, and then the lock is released. 4. The magnetic drive device according to claim 1, wherein the mover is moved. The magnetic drive device according to any one of claims 1 to 4, which is built in a housing, an imaging member exposed from an opening formed in the housing, and the imaging member connected to the movable element. An opening / closing door is provided which is moved between an open position to expose and open the opening and a closed position to cover the imaging member and close the opening, and when the movable element reaches one position, A portable information terminal with a camera, wherein the door is set to an open position, and the door is set to a closed position when the mover reaches the other position.

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