JP2005292355A - Light quantity adjusting device and optical equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light quantity adjusting device where two mechanisms, that is, a shutter mechanism and a diaphragm mechanism are arranged with proper space efficiency, while realizing the miniaturization of the overall device. <P>SOLUTION: The light quantity adjusting device is equipped with a shutter blade 3 driven by a driving unit, having a rotor magnet 2, a stator yoke 4 and a coil unit 5, a diaphragm blade 6 driven by a driving unit having a rotor magnet 2', a stator yoke 4' and a coil unit 5', a device base plate 1 for supporting the shutter blade 3 and the diaphragm blade 6 so as to rotate, respectively, and a presser member 8 for securing traveling space for the shutter blade 3 and the diaphragm blade 6. The driving unit of the shutter blade 3 and the driving unit of the diaphragm blade 6 are arranged in a point-symmetric state, with respect to an optical axis, and are held and supported between the device base plate 1 and the presser member 8. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a light amount adjusting device used in an optical apparatus such as a camera.

  Conventionally, there is a light amount adjusting device using a moving magnet type electromagnetic driving unit as a driving source of a shutter blade (for example, see Patent Document 1). In the light amount adjusting device described in Patent Document 1, an electromagnetic drive unit is disposed on one surface side of a substrate, and a shutter blade is disposed on the other surface side.

  In recent years, there is a strong demand for downsizing (thinning) optical devices such as digital video cameras and digital still cameras equipped with a light amount adjusting device, and the light amount adjusting device disposed in the optical device is also required to be downsized.

  Here, in a camera equipped with a lens barrel, a light amount adjusting device for adjusting the amount of light passing through is disposed in a cylindrical lens barrel together with a lens driving unit for performing focusing and zooming. For this reason, in order to downsize the lens barrel in the radial direction, it is necessary to downsize the light amount adjusting device and the like.

  In addition, when the lens barrel is downsized in the optical axis direction, it is necessary to shorten the distance from the light amount adjusting device to the imaging element (imaging device such as a film or a CCD) and the distance from the light amount adjusting device to the lens driving source. However, in order to prevent interference between the members, it is preferable to set the thickness dimension of the light amount adjusting device in the optical axis direction as small as possible.

Here, by using a rotor magnet made of a highly magnetic material such as a neodymium-based (Nd—Fe—B) magnet as the permanent magnet, the drive unit can be downsized and the shutter device as a whole can be downsized.
Japanese Patent Laid-Open No. 5-216090 (FIG. 1)

  However, if the drive unit is downsized, the attractive force and repulsive force generated between the permanent magnet and the magnetic stator yoke cannot be increased. In a configuration in which a power transmission member such as a drive lever is disposed between the drive source and the shutter blade, the drive force from the drive source is not efficiently transmitted to the shutter blade or the like, and the drive of the shutter blade or the like is unstable. There is a risk of becoming.

  On the other hand, in order to transmit the driving force required for the shutter blades, it is necessary to increase the electric power supplied to the driving unit (electromagnetic coil), but in this case, the power consumption increases. For this reason, it is difficult to make the light quantity adjusting device both compact and low power consumption.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a light amount adjusting device capable of miniaturizing and appropriately driving a shutter blade and the like without increasing a driving current.

  In order to solve the above problems, a first configuration of the light amount adjusting device of the present invention includes a base member in which a light passage opening is formed, first and second light shielding members that are movable with respect to the base member, By rotating the first rotor magnet by energizing the first coil and the pressing member disposed so as to sandwich the first and second light shielding members between the one surface of the base member, A first drive unit that drives one light shielding member, and a second drive unit that drives the second light shielding member by energizing the second coil and rotating the second rotor magnet. The first and second coils are arranged in a range of dimensions between the other surface of the base member and the surface of the pressing member opposite to the base member.

  According to the first configuration of the light amount adjusting device of the present invention, the first and second light shielding members and the first and second coils are arranged on the opposite side of the other surface of the base member and the base member of the pressing member. Therefore, the light amount adjusting device can be downsized in the optical axis direction.

  Further, by providing the base member with the first and second concave-shaped portions that are retracted to the optical axis side with respect to the first and second coils, the first and second in the plane orthogonal to the optical axis of the base member. Since one part of the coil can be arranged, the light amount adjusting device can be downsized in the optical axis direction.

  Furthermore, the first abutting surface is disposed on the base member side by an amount substantially equal to the thickness of the pressing member relative to the first surface, and the second abutting surface is substantially the same as the base member rather than the second surface. When the second surface and the other surface of the base member are disposed in substantially the same plane, the surface opposite to the first surface and the base member of the pressing member is disposed when the second member and the other surface of the base member are disposed in the same amount. They can be arranged in substantially the same plane.

  The light quantity adjusting device of the present invention can be mounted on an optical device such as a camera or a portable electronic device. As described above, if a light amount adjusting device that can be miniaturized is mounted on an optical device, the entire optical device can also be miniaturized.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. A camera according to an embodiment of the present invention will be described with reference to the drawings. Here, FIG. 1 is a perspective view of the camera of the present embodiment.

  In FIG. 1, reference numeral 100 denotes a camera body, and a lens barrel 110 capable of zooming is provided at the center of the front surface of the camera body 100. The lens barrel 110 incorporates a light amount adjusting device that adjusts the amount of light passing through the reflected light reflected from the subject. A detailed description of the light amount adjusting device will be described later. In addition, a light emission window 120 constituting a strobe device that irradiates a subject with illumination light is provided on the right side of the front surface of the camera body 100, and a finder window 140 and a photometry window 130 are provided on the left side of the light emission window 120, respectively. Is provided.

  Further, a release button 150 is provided on the upper surface of the camera body 100 to start a shooting preparation operation (focus adjustment operation and photometry operation) and a shooting operation (exposure to an image sensor such as a film, a CCD, or a CMOS sensor). ing.

  Next, the configuration of the light quantity adjusting device will be described with reference to FIG. Here, FIG. 2 is an exploded perspective view of the light amount adjusting device.

  Reference numeral 1 denotes a substrate (base member), and members described below are attached to the substrate 1. In the center of the substrate 1 is formed an opening 1d through which reflected light from the subject passes. Further, first and second rotating shafts 1a, 1a 'and first and second screw holes 1e, 1e' are formed at substantially four corners of the substrate 1, and the first and second rotations are made. The axes 1a and 1a 'have a substantially point-symmetric arrangement relationship about the optical axis, and the first and second screw hole portions 1e and 1e' also have a substantially point-symmetric arrangement about the optical axis. Have a relationship.

  Reference numeral 7 denotes a caliber plate (thin plate member) having a light transmission port 7d, and is arranged on the substrate 1 so as to cover the opening 1d.

  Reference numeral 2 denotes a first rotor magnet composed of a permanent magnet, and its outer peripheral surface is magnetized to two poles (N pole and S pole). The bearing hole 2 a of the first rotor magnet 2 is rotatably supported by a first rotating shaft 1 a provided on the substrate 1. A convex drive pin 2 b is provided on the upper surface of the rotor magnet 2. Reference numeral 2 ′ denotes a second rotor magnet, which has the same configuration as that of the first rotor magnet 2.

  Reference numeral 3 denotes a shutter blade (first light shielding member), and a rotation shaft hole portion 3a and a long hole portion 3b formed in the shutter blade 3 engage with the first rotation shaft 1a and the blade drive pin 2b, respectively. ing.

  Reference numeral 4 denotes a first stator yoke configured by laminating one or more plate-like members made of a soft magnetic material. The first stator yoke 4 has an outer peripheral curved surface of the first rotor magnet 2. Magnetic pole portions 4a and 4b that are opposed to each other are provided. The first stator yoke 4 is attached to the substrate 1 from the upper side in FIG. 2 together with a first coil 5 described later.

  Reference numeral 5 denotes a first coil having a configuration in which a conducting wire is wound around a bobbin 5a. The first coil 5 is disposed in a first concave portion 1 f that is retracted to the optical axis side formed on the substrate 1 in a state where the first stator yoke 4 is inserted.

By providing the first concave-shaped portion 1f, the first coil 5 can be arranged from the lower surface of the substrate 1 by the thickness of the substrate 1 at the maximum, so that the light amount adjusting device 12 is downsized in the optical axis direction. be able to.
Terminal holding portions 5a and 5b for holding terminals 5d and 5e connected to a power source (not shown) are provided on both end faces of the first coil 5 in the insertion direction of the first stator yoke 4.

  Reference numeral 6 denotes a diaphragm blade (second light shielding member), and a rotary shaft hole portion 6a and a long hole portion 6b formed in the diaphragm blade 6 are respectively associated with the second rotary shaft 1a ′ and the blade drive pin 2b ′. Match.

  Reference numeral 4 ′ denotes a second stator yoke configured by laminating one or a plurality of plate-like members made of a soft magnetic material. The second stator yoke 4 ′ includes a second rotor magnet 2 ′. Magnetic pole portions 4a ′ and 4b ′ that are opposed to each other with the outer peripheral curved surface interposed therebetween are provided. The second theta yoke 4 ′ is attached to the substrate 1 from the upper side in FIG. 2 together with a second coil 5 ′ described later.

  Reference numeral 5 'denotes a second coil having a configuration in which a conducting wire is wound around a bobbin 5a'. The second coil 5 ′ is disposed in the second concave portion 1 f ′ retracted to the optical axis side formed on the substrate 1 with the second stator yoke 4 ′ inserted.

  By providing the second concave portion 1f ', the light amount adjusting device can be reduced in size in the optical axis direction, similarly to the first concave portion 1f.

  Terminal holding portions 5b 'and 5c' for holding terminals 5d 'and 5e' connected to a power source (not shown) are provided on both end faces of the second coil 5 'in the insertion direction of the second stator yoke 4'. ing.

  Here, the first and second rotor magnets 2, 2 ′, the first and second stator yokes 4, 4 ′, and the first and second coils 5, 5 ′ have the same shape, and are formed on the substrate 1. On the other hand, they are arranged in a substantially point-symmetrical relationship with respect to the optical axis X.

  Reference numeral 8 denotes a blade pressing plate (pressing member). The blade pressing plate 8 includes first and second through-hole portions 8d and 8d ′ for fastening the first and second screws 9 and 9 ′. The first and second screw holes 1e and 1e 'are formed so as to have a substantially point-symmetrical arrangement with respect to the optical axis. Further, in the blade pressing plate 8, the first and second rotations are located at positions corresponding to the first and second rotation axes 1 a and 1 a ′, that is, at positions having a substantially point-symmetric relationship with respect to the optical axis. First and second shaft hole portions 8e and 8e 'with which the shafts 1a and 1a' are engaged are provided.

  Here, in the blade pressing plate 8, the portions near the first and second through-hole portions 8 d and 8 d ′ are positioned below the other portions by the approximate thickness dimension t 1 of the blade pressing plate 8. Thereby, the traveling space of the shutter blade 3 and the aperture blade 6 can be ensured.

  Next, the thickness of the light quantity adjusting device 12 in the optical axis direction will be described with reference to FIGS. Here, FIG. 3 is a cross-sectional view of the light amount adjusting device as viewed in the direction of arrow Y in FIG.

When the light amount adjusting device 12 is assembled, the upper surfaces (first contact surfaces) 50b and 50c of the terminal holding portions 5b and 5c are brought into contact with the lower surfaces of the corner portions 80b and 81b of the blade pressing plate 8. The upper surfaces 50b and 50c are located below the upper surface (first surface) of the first coil 5 by a dimension t2. Here, the dimension t2 is set to be approximately the same as the thickness dimension t1 of the blade pressing plate 8.
The first coil 5 and the first stator yoke 4 are fixed while being sandwiched between the blade pressing plate 8 and the substrate 1.

  The upper surfaces 50 b ′ and 50 c ′ of the terminal holding portions 5 b ′ and 5 c ′ are in contact with the lower surfaces of the corner portions 80 b ′ and 81 b ′ of the blade pressing plate 8. The upper surfaces 50b 'and 50c' are positioned below the upper surface (first surface) of the second coil 5 'by the thickness dimension t2 of the blade pressing plate 8. The second coil 5 ′ and the second stator yoke 4 ′ are fixed while being sandwiched between the blade pressing plate 8 and the substrate 1.

  In the above-described configuration, since the dimension t1 and the thickness dimension t2 of the blade pressing plate 8 are substantially the same, the upper surfaces of the first and second coils 5, 5 ′ and the upper surfaces 50b of the terminal holding portions 5b to 5c ′. ˜50c ′ can be arranged in substantially the same plane.

  Further, the lower surfaces (second contact surfaces) 51b to 51c ′ of the terminal holding portions 5b to 5c ′ are located above the lower surfaces of the first and second coils 5 and 5 ′ by a dimension t3. . Here, the dimension t3 is set to be substantially the same as the thickness dimension t4 of the first and second concave-shaped portions 1f and 1f 'on the substrate 1.

  Thereby, in a state where the light amount adjusting device 12 is assembled, the lower surface of the substrate 1 and the lower surfaces of the coils 5 and 5 ′ can be positioned in substantially the same plane. Note that the terminals 5 d to 5 e ′ protrude downward from the lower surface of the substrate 1.

As shown in FIG. 3, in this embodiment, the first and second coils 5, 5 ′ can be arranged within a dimension t <b> 5 from the upper surface of the blade pressing plate 8 to the lower surface of the substrate 1. Compared with the conventional example in which the unit and the aperture driving unit are supported by separate members, the light amount adjusting device can be downsized in the optical axis direction.
That is, in this embodiment, as shown in FIG. 3, the first and second coils 5 and 5 'are arranged at positions symmetrical with respect to the optical axis, so that the shutter blade and the diaphragm blade are driven. The light quantity adjusting device 12 can be made smaller in the optical axis direction than in the conventional example in which the two drive units are supported by separate members.

  In this embodiment, the drive unit for the shutter blade 3 (first rotor magnet 2, first stator yoke 4, first coil 5) and the drive unit for the aperture blade 6 (second rotor magnet 2 ', The second stator yoke 4 ′ and the second coil 5 ′) are supported by a single substrate 1. Therefore, the number of parts can be reduced and the cost of the light quantity adjusting device 12 can be reduced as compared with the conventional example in which these coils are supported by separate members.

  The first and second coils 5, 5 ′ (first and second stator yokes 4, 4 ′) are connected to the terminal holding portion 5b when the first and second screws 9, 9 ′ are fastened. ˜5c ′ is fixed by being sandwiched between the blade pressing plate 8 and the substrate 1, so that another member (for example, a screw) is used to fix the coils 5, 5 ′ (stator yokes 4, 4 ′) to the substrate 1. ) Becomes unnecessary. Thereby, since the number of parts can be reduced, the cost of the light quantity adjusting device 12 can be reduced and the light quantity adjusting device 12 can be reduced in size (thinned).

  Next, a method for assembling the light amount adjusting device 12 in this embodiment will be described.

  First, the first coil 5 in which the first stator yoke 4 is inserted is incorporated into the substrate 1. Similarly, the second coil 5 ′ in which the second stator yoke 4 ′ is inserted is incorporated in the substrate 1.

  Next, in order to fix the aperture plate 7, the contact portions 7b and 7b ′ are engaged with a part of the region facing the optical axis of the first and second stator yokes 4 and 4 ′. , 7a ′ are engaged with the abutting surfaces 1a, 1a ′ of the convex portions formed on the substrate 1.

  Then, the first and second rotor magnets 2, 2 'are inserted into the first and second rotating shafts 1a, 1a'. At this time, these rotor magnets 2, 2 'are in a non-magnetized state. Next, the shutter blade 3 is attached by engaging the rotary shaft hole portion 3a and the elongated hole portion 3b with the first rotary shaft 1a and the drive pin 2b. Similarly, the shutter blade 3 is attached by engaging the rotary shaft hole 6a and the elongated hole 6b with the second rotary shaft 1a 'and the drive pin 2b'.

  Then, the first and second screws 9 and 9 ′ are screwed into the first and second screw holes 1e and 1e ′ through the first and second through holes 8d and 8d ′, so that the blade holder is pressed. The plate 8 is fixed to the substrate 1. Finally, the shutter blade 3 and the diaphragm blade 6 are closed, and the first and second rotor magnets 2 and 2 'are simultaneously magnetized in a predetermined magnetization direction. Thereby, the assembly work of the light quantity adjusting device 12 is completed.

  In the light amount adjusting device 12 of the present embodiment, since all the parts constituting the light amount adjusting device 12 can be attached to the substrate 1 from one side (upper side in FIG. 2), the light amount adjusting device 12 can be easily assembled. . Further, the number of man-hours can be reduced by simultaneously magnetizing the first and second rotor magnets 2 and 2 '.

  Thus, by arranging the two drive units that drive the shutter blade 3 and the diaphragm blade 6 so as to have a point-symmetrical relationship with respect to the optical axis, these drive units are arranged on the substrate 1 and the blade pressing plate 8. It is possible to simultaneously magnetize the first and second rotor magnets 2 and 2 'in the same direction after being sandwiched between and supporting them, while using fine parts and assembling more than a conventional drive unit. Making it easy.

  Next, the operation of the light amount adjusting device 12 having the above-described configuration will be described with reference to FIGS. Here, in FIG. 4 to FIG. 7, the light amount adjusting device is illustrated with the blade pressing plate 8 removed.

  FIG. 4 shows a state of the light amount adjusting device when the shutter blade 3 and the aperture blade 6 are in the open state. FIG. 5 shows a state of the light amount adjusting device when the shutter blade is in the closed state and the aperture blade is in the open state (the shutter is closed at the open aperture). FIG. 6 shows a state where the shutter blade is in the open state and the small aperture diameter 6d of the aperture blade enters the light passage port (small aperture open state). FIG. 7 shows a state in which the shutter blades and the diaphragm blades have entered the light transmission aperture (the shutter is closed with a small aperture diameter).

  When the first and second coils 5, 5 ′ are in the energized OFF state, the first and second stator yokes 4, 4 ′ are in a non-excited state, and the shutter blade 3 and the aperture blade 6 are in the first state. In addition, they are in contact with the contact portions 1b and 1c by the attractive force (detent torque) of the magnetic pole portions 4a to 4b ′ of the second stator yokes 4 and 4 ′.

  From this state, when energization control of the first coil 5 is performed so that the magnetic pole portion 4a of the first stator yoke 4 becomes the S pole and the magnetic pole portion 4b becomes the N pole, the first stator yoke 4 and the first stator yoke 4 An attractive force and a repulsive force are generated between the first rotor magnet 2 and the first rotor magnet 2 rotates counterclockwise at an angle of about 40 ° to 50 ° from the state shown in FIG. As a result, as shown in FIG. 5, the shutter blade 3 moves away from the contact portion 1b and moves to a position where the light passage port 7d is closed.

  Here, the first rotor magnet 2 and the first stator yoke 4 are detent at an intermediate position (about 20 ° to 25 °) in the entire operating range (angle 40 ° to 50 °) of the first rotor magnet 2. The arrangement is such that the torque is zero and the direction of the detent torque is switched to the left and right (reverse direction) before and after the intermediate position.

  With this arrangement, the shutter blade 3 is brought into contact with the stopper portion 1b by the detent torque even after the coil 5 is energized to rotate the shutter blade 3 and the energization is turned off. Can be held in a state where the light passage port 7d is covered.

  Next, when energization control of the first coil 5 is performed so that the magnetic pole portion 4a of the first stator yoke 4 becomes the N pole and the magnetic pole portion 4b becomes the S pole, the first stator yoke 4 and the first stator yoke 4 A repulsive force and an attractive force are generated between the rotor magnets 2 and the first rotor magnet 2 rotates by an angle of about 40 ° to 50 ° in the clockwise direction in FIG. Return to the position shown.

  When the second coil 5 ′ is energized and controlled so that the magnetic pole portion 4a ′ of the second stator yoke 4 ′ becomes the N pole and the magnetic pole portion 4b ′ becomes the S pole from the state of FIG. An attractive force and a repulsive force are generated between the stator yoke 4 'and the second rotor magnet 2', so that the second rotor magnet 2 'has an angle of about 40 ° to 50 ° counterclockwise from the state of FIG. Only rotate.

  Thereby, as shown in FIG. 6, the aperture blade 6 moves from the open state to the closed state (a state in which the small aperture diameter 6d enters the light passage port 7d).

  When the second coil 5 ′ is turned off, the diaphragm blade 6 is held in the state shown in FIG. 6 by the detent torque between the second rotor magnet 2 ′ and the second stator yoke 4 ′. The

  Here, when the first coil 5 is energized and controlled so that the magnetic pole portion 4a of the first stator yoke 4 becomes the S pole and the magnetic pole portion 4b becomes the N pole, the first stator yoke 4 and the first rotor are controlled. An attractive force and a repulsive force are generated between the magnet 2 and the first rotor magnet 2 rotates counterclockwise from the state of FIG. 6 by an angle of about 40 ° to 50 °.

  Thereby, the shutter blade 3 moves from the open state to a position covering the light passage opening 7d (see FIG. 7).

  As described above, the first and second rotor magnets 2 and 2 ′ and the first and second stator yokes 4 and 4 ′ are electrically connected to the first and second coils 5 and 5 ′. The shutter blade 3 and the diaphragm blade 6 are rotated around the rotation shafts 1a and 1a ′ by the suction and repulsion, thereby adjusting the amount of light passing through the light passage port 7d.

  In addition, after the energization of the first and second coils 5 and 5 ′ is cut off, the first and second rotor magnets 2 and 2 ′ and the first and second stator yokes 4 and 4 ′ are interposed. Due to the generated detent torque, the shutter blades 3 and the diaphragm blades 6 are stopped in contact with the contact portions 1b and 1c.

  In addition, when the light quantity adjusting device 12 of the present embodiment is mounted on a digital camera in which the imaging medium 13 is configured by an imaging element such as a CCD, the forward and reverse directions to the first and second coils 5 and 5 ′ are reversed. The drive of the shutter blade 3 and the diaphragm blade 6 can be controlled by controlling the energization. Further, when the light amount adjusting device 12 of the present embodiment is mounted on a camera in which the imaging medium 13 is formed of a film, the shutter is set according to the energization time and energization timing of the first and second coils 5 and 5 ′. The driving of the blade 3 and the diaphragm blade 6 is controlled.

  The light amount adjusting device of this embodiment can be mounted on a lens device (optical device) that can be attached to and detached from the camera body, a portable electronic device (mobile phone, optical device) in which the camera is built, and the like.

  As described above, according to the light amount adjusting apparatus of the present invention, the entire apparatus can be reduced in size, and the light shielding member can be efficiently driven without increasing the power supplied to the coil unit.

FIG. The disassembled perspective view of the light quantity adjustment apparatus which is embodiment. Sectional drawing of a light quantity adjustment apparatus. The top view which shows the state transition of a light quantity adjustment apparatus (aperture open shutter full open state). The top view which shows the state transition of a light quantity adjustment apparatus (aperture open shutter fully closed state). The top view which shows the state transition of a light quantity adjustment apparatus (small aperture shutter full open state). The top view which shows the state transition of a light quantity adjustment apparatus (small aperture shutter fully closed state).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Board | substrate 1b, 1c Abutting surface 2 Rotor magnet 2b, 2b 'Drive pin 3 Shutter blade 3a Rotating shaft hole part 3b Long hole part 4, 4' Stator yoke 5, 5 'Coil 5b, 5c
6 Diaphragm blade 6a Rotating shaft hole portion 6b Long hole portion 7 Diameter plate 8 Blade retainer plate

Claims (8)

A base member having a light passage opening formed thereon;
First and second light shielding members movable relative to the base member;
A pressing member disposed so as to sandwich the first and second light shielding members between one surface of the base member;
A first drive unit for driving the first light shielding member by energizing the first coil and rotating the first rotor magnet;
A second drive unit that drives the second light-shielding member by energizing the second coil and rotating the second rotor magnet;
The first and second coils are disposed within a size range of the other surface of the base member and the surface of the pressing member opposite to the base member. .   2. The light amount adjusting device according to claim 1, wherein the first and second drive units have a substantially point-symmetric arrangement relationship with respect to the optical axis. The base member supports a first support shaft that rotatably supports the first rotor magnet and the first light shielding member, and rotatably supports the second rotor magnet and the second light shielding member. A second support shaft is provided,
The light amount adjusting device according to claim 2, wherein the first and second support shafts have a substantially point-symmetric arrangement relationship with respect to the optical axis. Having first and second fastening members for fastening the pressing member and the base member;
The light quantity adjusting device according to claim 2, wherein the first and second fastening members have a substantially point-symmetric arrangement relationship with respect to the optical axis.   The said base member is provided with the 1st and 2nd concave-shaped part evacuated to the optical axis side with respect to the said 1st and 2nd coil, The any one of Claim 2 to 4 characterized by the above-mentioned. The light quantity adjusting device described in 1. In the optical axis direction, the first and second coils are respectively arranged in order from the pressing member side, first and second surfaces;
A first holding surface and a second holding surface for contacting the pressing member and the base member, respectively, and a terminal holding member for holding the terminal,
The first contact surface is disposed closer to the base member than the first surface by approximately the thickness of the pressing member, and the second contact surface is formed from the second surface. The light amount adjusting device according to claim 5, wherein the light amount adjusting device is disposed on the side of the pressing member by an amount substantially equal to the thickness of the base member.   The base member is provided with an abutting portion that abuts on one of the first and second light shielding members and limits a rotation range of the one light shielding member. Item 7. The light amount adjusting device according to any one of Items 1 to 6.   An optical apparatus comprising the light amount adjusting device according to claim 1.

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