JP2010032673A - Blade drive unit for camera and personal digital assistant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a compact blade drive unit for a camera that drives a shutter blade and a diaphragm blade applied to a camera unit mounted in a cellular phone or the like. <P>SOLUTION: The blade drive unit for the camera includes electromagnetic actuators 60 and 80 arranged inside a hinge part (cylindrical member) of the cellular phone or the like and including rotors 61 and 81 rotating around an axial line parallel with a center axial line of the cylindrical member, and blade members 70 and 90 arranged inside the cylindrical member and rotating integrally with the rotors, and also reciprocating between a position where they face a photographing window 31a formed in the cylindrical member and a totally open position where they retreat from the photographing window, so as to adjust quantity of light advancing from the photographing window. Thus, the camera unit and the blade drive unit for the camera are arranged inside the hinge part of the cellular phone or the like, and a distinct high-quality image is taken while achieving miniaturization of the cellular phone or the like. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a camera blade drive unit that can be accommodated in a hinge portion or the like of a foldable mobile phone, and a portable information terminal device such as a mobile phone equipped with the camera blade drive unit. The present invention relates to a camera blade drive unit and a portable information terminal device for driving blade members such as a diaphragm blade (blade having a diaphragm opening or blade having an ND filter).

  As a conventional mobile phone, in a mobile phone provided with a main body in which operation buttons and the like are arranged, a lid in which a display unit is arranged, and a cylindrical hinge part that foldably connects the lid to the main body, A circular shooting window is provided in the part, and a lens optical system (zoom lens optical system or single focus lens optical system) and an image sensor are arranged inside the hinge part, and the subject light entering from the shooting window is imaged through the lens optical system. There are known devices equipped with a camera unit that guides an element to form an image for imaging (see, for example, Patent Document 1, Patent Document 2, and Patent Document 3).

  In addition, as another mobile phone, a mobile phone provided with a main body in which operation buttons and the like are arranged, a lid in which a display unit is arranged, and a cylindrical hinge portion that foldably connects the lid to the main body. , A rotatable cylindrical rotating body is provided in a part of the lid, a circular photographing window is provided in the rotating body, a lens optical system is disposed inside the rotating body, and an image sensor is further disposed in the lid, 2. Description of the Related Art There is known a camera unit equipped with a camera unit that takes a subject light that has entered through a photographing window and directs it to an image sensor through a lens optical system.

On the other hand, in a camera unit mounted on a mobile phone, the number of pixels of an image sensor is increasing, and in order to capture a clearer image, a mechanical aperture blade having an aperture opening and an ND filter is used. It is necessary to adjust the light amount of the subject light, and not only to control the drive of the image sensor as a shutter operation (electronic shutter) but also to define the exposure time with high accuracy using mechanical shutter blades.
Therefore, the conventional blade members such as shutter blades and diaphragm blades, electromagnetic actuators that generate driving force for opening and closing the blade members, transmission mechanisms that transmit the driving force of electromagnetic actuators to the blade members, etc. are simply mounted on the hinge part. However, since the volume of the hinge part is limited, it is difficult to mount it. If a conventional blade member, transmission member, electromagnetic actuator, or the like is mounted as it is, the hinge part has a large diameter and the mobile phone becomes large. It will be.

JP 2002-290523 A JP 2002-374434 A JP 2003-18276 A JP 2003-309748 A

  The present invention has been made in view of the above circumstances, and its object is to be mounted on a portable information terminal device such as a cellular phone while simplifying the structure, reducing the size, and reducing the cost. A blade member such as a shutter blade, an aperture blade (a diaphragm blade having an aperture opening, or an aperture blade having a region to which an ND filter is attached) that can be applied to a camera unit to adjust the amount of subject light. The object is to provide a blade drive unit for a camera and a portable information terminal device using the same.

The camera blade drive unit according to the present invention includes an electromagnetic actuator including a rotor disposed on the inner side of the cylindrical member and rotating about an axis parallel to the central axis of the cylindrical member, and disposed on the inner side of the cylindrical member and integrated with the rotor. And a blade member capable of adjusting the amount of light entering from the photographing window by reciprocating between a position facing the photographing window formed on the cylindrical member and a fully opened position retracted from the photographing window. It is said.
According to this configuration, when the electromagnetic actuator is driven and the rotor rotates, the blade member rotates around the axis parallel to the central axis of the cylindrical member integrally with the rotor, and the object light entering from the imaging window The amount of light is adjusted (for example, completely cut off or reduced to a predetermined amount).
As described above, since the blade member is directly provided to the rotor, the structure can be simplified and the number of parts can be reduced as compared with the case where a transmission mechanism or the like is employed. Since it rotates around an axis parallel to the central axis of the cylindrical member, the diameter and size of the cylindrical member can be reduced as compared with a case where the cylindrical member rotates about an axis intersecting the central axis.
Therefore, for example, in a configuration in which a camera unit including a lens optical system and an image sensor is disposed inside a cylindrical member that forms a part of a portable information terminal device, the camera blade drive unit (for example, a small-diameter hinge portion or It can be placed inside a cylindrical member (such as a dedicated cylindrical member), and therefore, in a portable information terminal device such as a mobile phone equipped with a camera unit, it can be reduced in size and has a clear and high image quality. Images can be taken.

In the above configuration, the blade member may be configured to be curved with a predetermined curvature so as to be parallel to the inner peripheral wall surface of the cylindrical member formed in a cylindrical shape.
According to this configuration, since the blade member can be arranged and reciprocated along the inner peripheral wall surface of the cylindrical cylindrical member, it is possible to reduce the diameter and size of the cylindrical member from the shooting window. It is possible to adjust the light amount of the subject light that enters with high accuracy (to completely block the light or reduce the light amount to a predetermined level).

In the above configuration, the blade member includes a shutter blade that can block light at a position facing the photographing window, and a diaphragm blade that restricts light at the position facing the photographing window, and the electromagnetic actuator includes a first electromagnetic that drives the shutter blade. A configuration including an actuator and a second electromagnetic actuator that drives the diaphragm blades can be employed.
According to this configuration, when the rotor of the first electromagnetic actuator rotates in one direction, the shutter blade moves to a position facing the photographing window to block light, and when the rotor of the first electromagnetic actuator rotates in the other direction, the shutter The blade moves to the fully open position retracted from the photographing window to allow the passage of light. Further, when the rotor of the second electromagnetic actuator rotates in one direction, the diaphragm blade moves to a position facing the photographing window to throttle the light to a predetermined light amount, and when the rotor of the second electromagnetic actuator rotates in the other direction, the diaphragm blade Moves to the fully open position retracted from the shooting window and releases the aperture.

In the above configuration, the first electromagnetic actuator and the second electromagnetic actuator are disposed so as to face each other in the central axis direction of the cylindrical member, and the shutter blade and the diaphragm blade are disposed so as to be able to overlap in the radial direction of the cylindrical member. It is possible to adopt the configuration.
According to this configuration, since the first electromagnetic actuator and the second electromagnetic actuator are arranged so as to face each other in the direction of the central axis of the cylindrical member, the internal space of the cylindrical member can be used effectively, and the shutter Since the blades and the diaphragm blades are arranged so as to be able to overlap in the radial direction of the cylindrical member, the diaphragm operation and the shutter operation can be performed independently and reliably at a desired timing.

In the above configuration, the electromagnetic actuator is rotationally driven so as to be able to stop in multiple stages at a plurality of angular positions, and the blade member has an aperture opening or an ND filter that restricts light at the first angular position facing the imaging window. A configuration may be employed in which the area and the blocking area that blocks light at the second angular position facing the imaging window are defined at least.
According to this configuration, when one electromagnetic actuator (for example, a stepping motor or other multistage stop type motor) rotates to the first angular position, the aperture opening of the blade member or the ND filter is positioned at a position facing the imaging window. When the light quantity is reduced to a predetermined level and rotated to the second angle position, the light blocking area of the blade member is positioned at a position facing the photographing window to block the light.
As described above, since the diaphragm operation and the shutter operation can be performed with only one electromagnetic actuator and one blade member, the number of parts is reduced, the structure is simplified, the cost is reduced, the size is reduced, and the portable information terminal. Miniaturization of the apparatus can be achieved.

A portable information terminal device according to the present invention is housed in a hinge unit that includes a main body on which operation buttons are arranged, a lid on which a display unit is arranged, a hinge that foldably connects the lid to the main body. A portable information terminal device including a lens optical system and a camera unit including an imaging device, wherein the hinge portion defines a cylindrical member, and the cylindrical member includes a camera blade driving unit configured as described above. Any one of the camera blade drive units is arranged.
According to this configuration, in the portable information terminal device in which the camera unit is mounted on the hinge portion, the camera blade drive unit having the above-described configuration is arranged in the hinge portion, thereby achieving miniaturization of the hinge portion and the portable information terminal device. However, it is possible to provide a portable information terminal device such as a mobile phone with a camera that can capture a clear and high-quality image.

  According to the blade drive unit for a camera having the above-described configuration, subject light applied to a camera unit mounted on a portable information terminal device such as a mobile phone while achieving simplification, size reduction, cost reduction, and the like. Camera blade drive unit for driving blade members such as shutter blades, diaphragm blades (blades having a diaphragm opening, or blades having an ND filter) that can adjust the amount of light of the camera can be obtained. By mounting the blade driving unit, a portable information terminal device with a camera that can capture a clear and high-quality image while achieving downsizing can be obtained.

DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, exemplary embodiments of the invention will be described with reference to the accompanying drawings.
1 to 6 show a mobile phone as a portable information terminal device equipped with a camera blade driving unit according to the present invention. FIG. 1 is a perspective view of the mobile phone, and FIG. 2 is a hinge portion of the mobile phone. FIG. 3 is a cross-sectional view taken from the direction of the central axis showing the inside of the hinge portion, and FIG. 4 is a rotor and shutter blade (blade member) included in the camera blade drive unit. 5 is a perspective view showing a rotor and a diaphragm blade (blade member) included in the camera blade drive unit, and FIGS. 6A and 6B are cross-sectional views showing structures of the rotor and the blade member. It is. In FIG. 3, for convenience of explanation, a first electromagnetic actuator 60 and a second electromagnetic actuator 80, which will be described later, are displayed in an overlapping manner.

As shown in FIG. 1, the mobile phone P includes a main body 10 in which a plurality of operation buttons 10a are arranged, a lid body 20 in which a display unit (liquid crystal monitor) 20a for displaying various information is arranged, and the lid body 20 in the main body. 10 is provided with a hinge portion 30 that is foldably connected to the main body 10.
The main body 10 has the operation buttons 10a arranged and held on the surface, and internally includes a transmission / reception circuit and a control circuit, a driving circuit for a camera unit C and camera blade driving units M1 and M2, which will be described later, and a power source. ing.
The lid 20 holds the display unit 20a so as to be exposed, and incorporates a display circuit, other electronic circuits, and the like therein.

As shown in FIG. 1, the hinge portion 30 includes a cylindrical member 31 as a cylindrical member having a central axis S, and is formed to foldably connect the lid 20 to the main body 10.
As shown in FIGS. 1 and 2, the hinge portion 30 has a circular photographing window 31a formed in the cylindrical member 31, and on the optical axis L of the subject light passing through the photographing window 31a in the inside thereof. The camera unit C including the lens optical system 40 and the image sensor 50 arranged in the two, and the two blade driving units M1 and M2 for the camera are housed.
Here, the cylindrical member 31 is rotatably supported around the central axis S so that the photographing window 31a can be oriented at a predetermined angle.

The lens optical system 40 includes a lens G1 disposed inside the photographing window 31a, a lens G2, a lens G3, and a lens G4 sequentially arranged behind the lens G1 in the optical axis direction L. Arranged and fixed inside.
The imaging device 50 is configured by a CCD or the like, and is disposed and fixed in the optical axis direction L inside the hinge portion 30 and behind the lens optical system 40.

The camera blade drive unit M <b> 1 is disposed inside the hinge portion 30 (the cylindrical member 31 thereof), and is a shutter as a blade member provided in the first electromagnetic actuator 60 and the rotor 61 included in the first electromagnetic actuator 60. It is formed by blades 70 and the like.
As shown in FIGS. 2 and 3, the first electromagnetic actuator 60 supports the rotor 61 and the rotor 61 so as to be rotatable around an axis parallel to the central axis S (here, an axis coincident with the central axis S). A support frame 62, an exciting coil 63 wound around the support frame 62, a cylindrical yoke 64 fitted to the outer periphery of the support frame 62, and a plurality of irons fitted and fixed to the support frame 62 A pin 65 and the like are provided.
The rotor 61 is integrally formed with a rotating shaft 61a supported by the support frame 62, a columnar magnetized portion 61b centered on the rotating shaft 61a, and an arm portion 61c holding the shutter blades 70. .
The support frame 62 is formed so as to be fixed to the inner wall of the hinge portion 30 (the cylindrical member 31), and the arm portion 61c is brought into contact with the shutter blade 70 in order to position the shutter blade 70 in the fully opened position retracted from the photographing window 31a. A stopper 62b is provided for abutting the arm portion 61c to position the stopper 62a and the shutter blade 70 at a position facing the photographing window 31a.
The coil 63 is wound around the support frame 62 so as to cover both ends of the rotating shaft 61a of the rotor 61 from the outside.

As shown in FIGS. 2 and 4, the shutter blade 70 has a substantially rectangular shape and is curved to a predetermined curvature.
Here, as shown in FIG. 6A, the shutter blade 70 may be formed of a metal plate or the like and then coupled to the arm portion 61c of the rotor 61, or as shown in FIG. 6B. Alternatively, the arm 61c of the rotor 61 may be integrally formed of a resin material.
Further, the shutter blade 70 is formed in a curved shape so that the shutter blade 70 is arranged in parallel with the inner peripheral wall surface forming a predetermined curvature of the hinge portion 30 (the cylindrical member 31 thereof) and maintains a constant interval in FIG. As shown in FIG. 2, the light is reciprocated between a position facing the photographing window 31a (a position where light is blocked) and a fully opened position retracted from the photographing window 31a (a position where light passage is allowed).
Here, since the shutter blade 70 is curved with a predetermined curvature so as to be parallel to the inner peripheral wall surface of the cylindrical member 31, the shutter blade 70 is disposed along the inner peripheral wall surface of the cylindrical member 31. Thus, the subject light entering from the photographing window 31a can be completely blocked while the diameter and size of the cylindrical member 31 are reduced.

The camera blade drive unit M <b> 2 is disposed inside the hinge portion 30 (the cylindrical member 31 thereof), and the diaphragm as a blade member provided in the second electromagnetic actuator 80 and the rotor 81 included in the second electromagnetic actuator 80. It is formed by blades 90 and the like.
As shown in FIGS. 2 and 3, the second electromagnetic actuator 80 supports the rotor 81 and the rotor 81 so as to be rotatable around an axis parallel to the central axis S (here, an axis coincident with the central axis S). A support frame 82, an exciting coil 83 wound around the support frame 82, a cylindrical yoke 84 fitted to the outer periphery of the support frame 82, and a plurality of irons fitted and fixed to the support frame 82 Pins 85 and the like are provided.
The rotor 81 is integrally formed with a rotation shaft 81a supported by the support frame 82, a columnar magnetized portion 81b centered on the rotation shaft 81a, and an arm portion 81c holding the aperture blade 90. .
The support frame 82 is formed so as to be fixed to the inner wall of the hinge part 30 (the cylindrical member 31), and the arm part 81c is brought into contact with the diaphragm blade 90 so as to be positioned at the fully opened position retracted from the photographing window 31a. A stopper 82b is provided for abutting the arm portion 81c so as to position the stopper 82a and the aperture blade 90 at a position facing the photographing window 31a.
The coil 83 is wound around the support frame 82 so as to cover both ends of the rotating shaft 81a of the rotor 81 from the outside.

As shown in FIGS. 2 and 5, the diaphragm blade 90 is formed in a substantially rectangular shape and curved to a predetermined curvature, and defines an aperture opening 90 a having a predetermined diameter at the approximate center thereof.
Here, the aperture blade 90 may be formed of a metal plate or the like as shown in FIG. 6A and then coupled to the arm portion 81c of the rotor 81, or as shown in FIG. 6B. Alternatively, it may be integrally formed of a resin material that forms the arm portion 81 c of the rotor 81.
In addition, the diaphragm blade 90 is formed in a curved shape so that the diaphragm blade 90 is arranged in parallel with the inner peripheral wall surface forming a predetermined curvature of the hinge portion 30 (the cylindrical member 31 thereof) and maintains a constant interval in FIG. As shown in FIG. 2, the light is reciprocated between a position facing the photographing window 31a (a position where the light is narrowed) and a fully open position retracted from the photographing window 31a (a position where the light is not narrowed).
Here, since the diaphragm blades 90 are curved with a predetermined curvature so as to be parallel to the inner peripheral wall surface of the cylindrical member 31, the diaphragm blades 90 are arranged along the inner peripheral wall surface of the cylindrical member 31. Thus, the light amount of the subject light entering from the photographing window 31a can be narrowed down to a predetermined level with high accuracy while achieving a reduction in the diameter and size of the cylindrical member 31.
In addition, although the thing which has the aperture opening 90a was shown as the aperture blade 90, it is not limited to this, You may employ | adopt what attached the ND filter to the predetermined opening.

Here, as shown in FIG. 2, the first electromagnetic actuator 60 and the second electromagnetic actuator 80 are arranged to face each other in the direction of the central axis S of the hinge portion 30 (outer peripheral wall 31). Thereby, the internal space of the hinge part 30 (outer peripheral wall 31) can be used effectively.
Further, as shown in FIG. 2, the shutter blade 70 and the diaphragm blade 90 are arranged so as to overlap in the radial direction of the hinge portion 30 (the cylindrical member 31 thereof). Thus, since the shutter blade 70 and the diaphragm blade 90 are arranged inside the cylindrical member 31 and arranged so as to be able to overlap in the radial direction, the diaphragm operation and the shutter operation are independently performed in a desired manner. It can be surely performed at the timing.

Next, a photographing operation in a mobile phone equipped with the camera blade driving units M1 and M2 and the camera unit C will be described.
First, in the resting state, the shutter blades 70 and the diaphragm blades 90 are positioned at the positions facing the photographing window 31a, and are in a state of blocking light from entering from the outside.
Here, when one of the operation buttons 10a is operated to enter the photographing mode, the first electromagnetic actuator 60 and the second electromagnetic actuator 80 are driven, and the shutter blade 70 and the diaphragm blade 90 are fully opened when they are retracted from the photographing window 31a. Moved to position.

When one of the operation buttons 10a is operated and a release operation is performed, the light amount of the subject light is measured by the image sensor 50.
When it is determined that it is not necessary to reduce the amount of light, charge accumulation by the image sensor 50 is started, and after a predetermined time has elapsed, the first electromagnetic actuator 60 is driven, and the rotor 61 rotates in one direction and the shutter. The blade 70 moves to a position facing the photographing window 31a to block the subject light.
Thereby, after the photographing by the image sensor 50 is completed and image data is accumulated, the first electromagnetic actuator 60 is driven in the reverse direction, the rotor 61 is rotated in the reverse direction, and the shutter blades 70 are moved. The camera moves to the fully opened position retracted from the shooting window 31a and enters a standby state in preparation for the next shooting.

On the other hand, when the light amount of the subject light is measured by the image sensor 50 and it is determined that it is necessary to reduce the light amount, the second electromagnetic actuator 80 is driven, the rotor 81 rotates in one direction, and the aperture blade 90 captures the image. Moving to a position facing the window 31a, the amount of subject light is reduced to a predetermined level. Subsequently, charge accumulation by the image sensor 50 is started, and after a predetermined time has elapsed, the first electromagnetic actuator 60 is driven to rotate the rotor 61 in one direction and move the shutter blade 70 to a position facing the imaging window 31a. Then, the subject light is blocked.
Thereby, after the imaging by the image sensor 50 is completed and image data is accumulated, the first electromagnetic actuator 60 and the second electromagnetic actuator 80 are driven in the reverse direction, and the rotors 61 and 81 are moved in the reverse direction. Rotating, the shutter blade 70 and the diaphragm blade 90 move to the fully open position retracted from the photographing window 31a, and enter a standby state in preparation for the next photographing.

As described above, when the first electromagnetic actuator 60 and the second electromagnetic actuator 80 are driven and the rotors 61 and 81 rotate, the shutter blades 70 are integrated with the rotor 61 and the diaphragm blades 90 are integrated with the rotor 81. Rotate about an axis (here coaxial) parallel to the central axis S of the cylindrical member 31 to adjust the amount of subject light entering from the photographing window 31a (completely cut off, narrowed down to a predetermined amount). ing.
Thus, since the blade members (shutter blades 70 and diaphragm blades 90) are directly provided to the rotors 61 and 81, the structure is simplified and the number of parts is reduced compared to the case where a transmission mechanism or the like is employed. In addition, the rotors 61 and 81 and the blade members (shutter blades 70 and diaphragm blades 90) rotate around an axis parallel to the central axis S of the cylindrical member 31, so that the axis around the central axis S intersects. The diameter and size of the cylindrical member 31 can be reduced as compared with the case of rotation.

  Therefore, in the configuration in which the camera unit C including the lens optical system 40 and the imaging element 50 is disposed inside the hinge portion 30 (the cylindrical member 31) that forms part of the mobile phone P, this camera blade drive unit M1. , M2 can be arranged inside the cylindrical member 31, and therefore, in a mobile phone equipped with the camera unit C, a clear and high-quality image can be taken while achieving miniaturization. .

FIG. 7 shows another embodiment of the camera blade drive unit according to the present invention, which is the same as the previous embodiment except that the camera blade drive unit M2 is changed to the camera blade drive unit M2 ′. Therefore, the description of the same configuration is omitted.
The camera blade drive unit M2 ′ in this embodiment includes a second electromagnetic actuator 80 ′ formed so that the rotor 81 ′ stops at three rotational angular positions, and two diaphragm openings 90a and 90b having different diameters. A diaphragm blade 90 'is formed so as to demarcate.
The diaphragm blade 90 'has two diaphragm openings 90a and 90b. However, the diaphragm blade 90' is not limited to this, and one having an ND filter attached to one opening or two openings. You may employ | adopt what affixed the ND filter from which a density | concentration differs.

In this embodiment, when the rotor 81 'is stopped at one rotational end angular position, the aperture blade 90' is positioned at the fully open position retracted from the photographing window 31a, and the rotor 81 'is stopped at the intermediate angular position. The diaphragm blade 90 'is positioned at a position where the diaphragm opening 90a faces the photographing window 31a, and when the rotor 81' is stopped at the other rotational end angular position, the diaphragm blade 90 'is photographed by the diaphragm opening 90b. It is located at a position facing the window 31a.
That is, in this embodiment, the light amount of the subject light can be adjusted to three levels by the camera blade drive unit M2 ′.

  Also in this embodiment, since the blade member (diaphragm blade 90 ') is directly provided to the rotor 81', the structure is simplified and the number of parts is reduced as compared with the case where a transmission mechanism or the like is employed. Further, since the rotor 81 ′ and the blade member (aperture blade 90 ′) rotate around an axis parallel to the central axis S of the cylindrical member 31, compared with the case where the rotor 81 ′ and the blade member 90 ′ rotate around an axis intersecting with the central axis S. The cylindrical member 31 can be reduced in diameter and size.

8 and 9 show still another embodiment of the camera blade drive unit according to the present invention, except that the camera blade drive units M1 and M2 are changed to the camera blade drive unit M ′. Since it is the same as that of the above-mentioned embodiment, description is abbreviate | omitted about the same structure.
The camera blade drive unit M ′ in this embodiment includes an electromagnetic actuator 100 that is rotationally driven so that the rotor 101 can be stopped in multiple stages at a plurality of angular positions, two aperture openings 110a and 110b having different apertures, and photographing. The blade member 110 is formed so as to define a blocking region 110c that can block the window 31a.
Here, as the electromagnetic actuator 100, for example, a stepping motor or other multistage (plural angular position) stop type motor is employed.

  In this embodiment, when the rotor 101 is stopped at one rotational end angular position, the blade member 110 is positioned at the fully open position retracted from the imaging window 31a, and the rotor 101 is in the first intermediate position as the first angular position. When stopped at the angular position, the blade member 110 is positioned at a position where the aperture opening 110a faces the imaging window 31a, and when the rotor 101 is stopped at the second intermediate angular position as the first angular position, the blade member 110 110 is positioned at a position where the aperture opening 110b faces the photographing window 31a, and when the rotor 101 is stopped at the other rotational end angular position as the second angular position, the blade member 110 has the blocking area 110c at the photographing window 31a. Positioned to face.

That is, in this embodiment, when one electromagnetic actuator 100 rotates to the first intermediate angular position as the first angular position or the second intermediate angular position as the first angular position, the aperture opening 110a of the blade member 110 or When 110b is positioned at the position facing the shooting window 31a, the light amount is reduced to a predetermined level, and when it is rotated to the second angle position, the blocking area 110c of the blade member 110 is positioned at the position facing the shooting window 31a and blocks the light. It is supposed to be.
As described above, since only one electromagnetic actuator 100 and one blade member 110 can perform an aperture operation that can reduce the amount of subject light to two levels and a shutter operation that completely blocks the subject light. By reducing the number of parts, the structure can be simplified, the cost can be reduced, the size can be reduced, the size of the mobile phone can be reduced, and the like.
In addition, although the thing which has two aperture openings 110a and 110b was shown as the blade member 110, it is not limited to this, The thing by which the ND filter was affixed to one opening, or density | concentration to two openings Those with different ND filters may be employed.

  Also in this embodiment, since the blade member 110 is provided directly with respect to the rotor 101, the structure can be simplified, the number of parts can be reduced, and the like compared to the case where a transmission mechanism or the like is employed. Since the 101 and the blade member 110 rotate around an axis parallel to the central axis S of the cylindrical member 31, the cylindrical member 31 can be reduced in diameter and size as compared with the case where it rotates around an axis intersecting the central axis S. it can.

In the above-described embodiment, the case where the camera blade drive units M1, M2, M2 ′, and M ′ are arranged in the cylindrical member 31 (cylinder member) of the hinge portion 30 has been described. However, the present invention is not limited to this. Alternatively, as long as it is a cylindrical member that forms a part of the portable information terminal device, it may be arranged inside a cylindrical member that is provided exclusively for housing the camera unit.
In the above embodiment, a mobile phone is shown as the portable information terminal device. However, the present invention is not limited to this, and the camera of the present invention can be used in a portable music player, a portable television, other portable electronic devices, and the like. A blade driving unit can be employed.
In the above embodiment, the camera unit C accommodated in the cylindrical member is the camera unit C in which the lens optical system 40 and the image sensor 50 are arranged on the optical axis L that forms a straight line. However, the present invention is not limited to this. Instead, the camera blade drive unit of the present invention may be employed in a configuration in which a camera unit including a lens optical system including a bending element such as a prism or a variable magnification optical system is mounted.

  As described above, the camera blade drive unit of the present invention can be accommodated in a cylindrical member together with the camera unit while achieving simplification of structure, size reduction, cost reduction, and the like. Of course, it can be mounted on a hinge part that forms a cylindrical member such as a portable music player, a portable television, a portable personal computer, etc. It is also useful in portable information terminal devices and in-vehicle terminal devices.

It is a perspective view which shows the mobile telephone carrying the blade drive unit for cameras which concerns on this invention. It is sectional drawing which shows the inside of the hinge part of the mobile telephone shown in FIG. It is sectional drawing which shows the inside of the hinge part of the mobile telephone shown in FIG. It is a perspective view which shows the rotor and blade | wing member (shutter blade | wing) which are contained in the blade drive unit for cameras. It is a perspective view which shows the rotor and blade | wing member (diaphragm blade | wing) which are contained in the blade drive unit for cameras. It is sectional drawing which shows the structure of the rotor and blade member which are contained in the blade drive unit for cameras, (a) is sectional drawing which shows what formed the blade member with the metal plate, and couple | bonded with the rotor, (b) is a blade member and It is sectional drawing which shows what integrally formed the rotor with the resin material. FIG. 6 is a perspective view showing a rotor and a blade member (aperture blade) according to another embodiment of the camera blade drive unit according to the present invention. FIG. 6 is a cross-sectional view showing still another embodiment of the camera blade drive unit according to the present invention and showing the inside of the hinge portion of the mobile phone. It is a perspective view which shows the rotor and blade | wing member which are contained in the blade drive unit for cameras shown in FIG.

Explanation of symbols

P Mobile phone (personal digital assistant)
DESCRIPTION OF SYMBOLS 10 Main body 10a Operation button 20 Lid 20a Display part 30 Hinge part 31 Cylindrical member (cylinder member)
S Center axis 31a Imaging window 40 Lens optical system G1, G2, G3, G4 Lens 50 Imaging element C Camera unit M1 Camera blade drive unit 60 First electromagnetic actuator 61 Rotor 61a Rotating shaft 61b Magnetized part 61c Arm part 62 Support frame 62a, 62b Stopper 63 Excitation coil 64 Yoke 65 Iron pin 70 Shutter blade (blade member)
M2, M2 'Camera blade drive unit 80, 80' Second electromagnetic actuator 81, 81 'Rotor 81a Rotating shaft 81b Magnetized part 81c Arm part 82 Support frame 82a, 82b Stopper 83 Excitation coil 84 Yoke 85 Iron pin 90 , 90 'diaphragm blade (blade member)
90a, 90b Aperture opening M ′ Camera blade drive unit 100 Electromagnetic actuator 101 Rotor 110 Blade members 110a, 110b Aperture opening 110c Blocking area

Claims (6)

An electromagnetic actuator including a rotor that is disposed inside a cylindrical member and rotates about an axis parallel to a central axis of the cylindrical member;
It is arranged inside the cylindrical member, rotates together with the rotor, and reciprocates between a position facing the imaging window formed in the cylindrical member and a fully open position retracted from the imaging window, and the imaging A blade member capable of adjusting the amount of light entering from the window;
A blade drive unit for a camera. The blade member is formed to be curved with a predetermined curvature so as to be parallel to the inner peripheral wall surface of the cylindrical member formed in a cylindrical shape.
The camera blade drive unit according to claim 1. The blade member includes a shutter blade that can block light at a position facing the photographing window, and a diaphragm blade that squeezes light at a position facing the photographing window,
The electromagnetic actuator includes a first electromagnetic actuator that drives the shutter blades and a second electromagnetic actuator that drives the aperture blades,
The blade drive unit for a camera according to claim 2, wherein: The first electromagnetic actuator and the second electromagnetic actuator are arranged so as to face each other in the central axis direction of the cylindrical member,
The shutter blades and the diaphragm blades are arranged so as to overlap in the radial direction of the cylindrical member,
The camera blade drive unit according to claim 3. The electromagnetic actuator is rotationally driven so that it can be stopped in multiple stages at a plurality of angular positions,
The blade member has at least an aperture opening or an ND filter that restricts light at a first angular position facing the imaging window, and a blocking area that blocks light at a second angular position facing the imaging window. Formed to define,
The camera blade drive unit according to claim 1, wherein the camera blade drive unit is provided. A main body in which operation buttons are arranged, a lid in which a display unit is arranged, a hinge part that foldably connects the lid to the main body, and a lens optical system and an image sensor housed in the hinge part A portable information terminal device comprising: a camera unit including:
The hinge portion defines a tubular member;
The camera blade driving unit according to any one of claims 1 to 5 is disposed on the cylindrical member.
A portable information terminal device.

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