JP2005222016A - Shutter device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shutter device realizing thinning and capable of operating a shutter blade and an ND filter by a small number of components. <P>SOLUTION: In the shutter device 21, a 1st magnet 24a is fixed on either surface of a 1st link member 23, and is magnetized to have both magnetic poles with a turning supporting part 23a as a boundary, and a 1st coil 32a is disposed on an upper side opposed to the 1st magnet 23a. Then, magnetic flux generated by energizing the 1st coil 32a acts on the magnetic flux of both magnetic poles of the 1st magnet 24a, whereby the 1st link member 23 turns like a seesaw with the turning supporting part 23a as a fulcrum, and the shutter blade 29 can open/close an aperture part 26a. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a shutter device, and more particularly to a shutter device suitable for use in a digital movie camera, a digital still camera, or the like.

A conventional shutter device will be described based on Patent Document 1. As shown in FIG. 9, a ring-shaped magnet 1 has a fitting hole 1a formed at the center and a dowel 1b projecting upward. Two dowels 1c and 1d protruding to the lower surface side are formed.
The magnet 1 is equally divided into n in the circumferential direction, and S poles and N poles are alternately magnetized.
A cylindrical coil 2 is wound around a bobbin 3 made of an insulating material and disposed above the magnet 1. On the bobbin 3, a dowel 3a is formed to protrude.

In addition, a disc-shaped yoke 4 made of a magnetic material is disposed on the upper portion of the coil 2, and comb-shaped first magnetic pole portions 4a, 4b, 4c, 4d, and 4e are formed on the yoke 4. Yes. When the coil 2 is energized, the comb-shaped first magnetic pole portions 4a, 4b, 4c, 4d, and 4e are excited and the coil 3 is rotated.
In addition, a flat blade that is a second magnetic pole portion in which a polarity opposite to that of the magnetic pole portions 4a to 4e is excited by the coil 2 below the magnet 1 in which the fitting ring 6 is fitted in the fitting hole 1a. A holding plate 9 is provided.
An opening 9 a having a predetermined diameter is formed at the center of the blade pressing plate 9.

In addition, a base member 5 having an opening 5a formed in the center via the first and second shutter blades 7 and 8 is disposed below the blade pressing plate 9, and the base member 5 includes a dowel 5b. 5c is formed, and long holes 5d and 5e are formed in which the dowels 1c and 1d of the magnet 1 can be engaged. When the magnet 1 rotates, the dowels 1c and 1d come into contact with the long holes 5d and 5c, so that the rotation angle of the magnet 1 is regulated by a predetermined angle.
The first shutter blade 7 has a round hole 7 a fitted in the dowel 5 c of the base member 5, and a round hole 7 b fitted in the dowel 1 d of the magnet 1.

In the second shutter blade 8, the round hole 8 a is fitted to the dowel 5 b of the base member 5, and the round hole 8 b is fitted to the dowel 1 c of the magnet 1. An ND filter plate 10 is disposed below the base member 5, and a hole 10a is fitted into a dowel (not shown) formed on the lower surface of the base member 5 so as to be rotatable.
The ND filter plate 10 is formed by affixing a filter portion 10b having a small light transmittance with an adhesive or the like.
The ND filter plate 10 rotates about the hole 10a, so that the filter 10b can cover the base member 5 and the openings 5a and 9a of the blade pressing plate 9.

An interlocking lever 11 is disposed on the yoke 4, the hole 11a is supported by the dowel 3a of the bobbin 3, and the interlocking lever 11 is rotatable about the hole 11a. Further, the groove 11b of the interlocking lever 11 is fitted to the dowel 1b of the magnet 1, and when the magnet 1 rotates, the interlocking lever 11 rotates with the hole 11a as a fulcrum by an angle corresponding to this rotation. ing.
The interlocking tiber 11 is formed with a gear portion 11c, and the gear portion 12a of the input gear 12 is engaged with the gear portion 11c.

The input gear 12 constitutes a one-way clutch together with an output member 13 having a ratchet gear (not shown) inside. Further, the pin 13b of the output member 13 is slidably fitted in the long hole 10c of the ND filter plate 10.
And according to rotation of the output member 13, the ND filter board 10 rotates, and the filter part 10b performs the operation | movement which covers each opening part 5a, 9a, or open | releases.

The operation of the magnet 1 and the ND filter plate 10 in the conventional shutter device having such a configuration will be described. For example, when the coil 2 is not energized, the first filter unit 10b is retracted from the openings 5a and 9a. The exposure is stopped.
From this state, when the coil 2 is energized to excite the S poles of the magnetic pole portions 4a to 4e of the yoke 4, the magnet 1 receiving the electromagnetic force in the rotating direction rotates a predetermined angle in the clockwise direction.

At this time, the input gear 12 rotates via the interlocking lever 11, but the output member 13 does not rotate due to the action of the internal ratchet gear. Therefore, the filter 10 b of the ND filter plate 10 remains stopped in the first exposure state that is avoided from the opening 9 a of the blade pressing plate 9.
Here, when the energization direction to the coil 2 is reversed, the magnetic pole portions 4a to 4e of the yoke 4 are excited to the N pole, and the magnet 1 rotates a predetermined angle in the counterclockwise direction.

Further, the input gear 12 is also reversed in conjunction with the reversal of the magnet 1, and the output member 13 is rotated counterclockwise by a predetermined angle by the action of the ratchet gear of the output member 13.
Along with this, the ND filter 10 is rotated by the pin 13b of the output member 13, and the filter portion 10b covers the openings 5a and 9a.
As a result, the second exposure state in which the amount of light passing through the openings 5a and 9a is smaller than that in the first exposure state.
JP 2002-345225 A JP 2003-111376 A

  However, the conventional shutter device as described above uses the magnet 1 for rotating the shutter blades 7 and 8, and rotates the ND filter 10 via the interlocking lever 11, the input gear 12, the output member 13, and the like. Therefore, there is a problem that backlash generated between the respective members is accumulated and the ND filter 10 rotates slightly behind the magnet 1 as an actuator.

Further, since the conventional shutter device requires the interlocking lever 11, the input gear 1, and the output member 13 having a ratchet gear inside to operate the ND filter plate 10, the number of parts is increased. There is a problem that the cost increases and the thickness dimension increases.
SUMMARY An advantage of some aspects of the invention is that it provides a shutter blade and a shutter device capable of operating an ND filter with a small number of parts that can be reduced in thickness.

As a first means for solving the above problems, the shutter device of the present invention includes a base member having a base portion having an opening with a predetermined aperture, and the opening supported by the shutter support portion of the base member. A shutter blade that can rotate in a direction to open and close the portion, and a first link member that can rotate the shutter blade, and the base member has the first link member disposed outside the base portion A first link support portion capable of rotatably supporting is formed,
The first link member is formed with a rotation support portion that can be supported by the first link support portion, and the one end side and the other end side in a state where the rotation support portion is supported by the first link support portion. And can be turned like a seesaw,
A first magnet is fixed to one surface of the first link member, and the first magnet has one and the other magnetic poles magnetized with the rotation support portion as a boundary, and faces the first magnet. A first coil is disposed on the side, and a magnetic flux generated by energizing the first coil acts on a magnetic flux of the one and the other magnetic poles of the first magnet, whereby the first link member is It is characterized in that it rotates like a seesaw with a rotation support part as a fulcrum, so that the shutter blade can open and close the opening.

  Further, as a second solving means for solving the above-mentioned problem, a shutter driving unit capable of rotating the shutter blade is formed on one end portion side of the first link member, and the shutter blade is a thin plate A support portion that can be supported by the shutter support portion of the base member and an engagement portion that can engage the shutter drive portion of the first link member, and the shutter blades are When the rotation of the first link member is transmitted to the engagement portion via the shutter driving portion, the first link member rotates in the direction opposite to the rotation direction of the first link member with the support portion as a fulcrum. And

  Further, as a third solving means for solving the problem, the shutter driving portion of the first link member is formed in a protruding shape, and the engaging portion of the shutter blade is formed in a long hole shape, When the first link member rotates, the shutter driving unit slides on the inner peripheral surface of the engagement unit, and the shutter blade rotates in a direction to open and close the opening with the support unit as a fulcrum. It is characterized by that.

As a fourth means for solving the problems, the base member is formed with a first link guide portion protruding from the base portion, and the first link support portion is formed on the first link guide portion. And
The first link member is disposed outside an outer peripheral portion of the base portion, and the rotation support portion is supported by the first link support portion.

  Further, as a fifth solving means for solving the above-mentioned problem, the base member is formed with a blade guide portion protruding from the base portion, and the shutter blade is attached to the shutter support portion formed in the blade guide portion. It is characterized by being supported.

  Further, as a sixth solving means for solving the above-mentioned problem, a protruding filter support portion is formed on the blade guide portion of the base member, and a filter blade having an ND filter attached to the filter support portion. Or a diaphragm blade having a diaphragm having a small-diameter hole smaller than the diameter of the opening is rotatably supported, and the amount of light passing through the opening can be adjusted by an ND filter or a small-diameter hole. Features.

  Further, as a seventh solving means for solving the above-described problem, a second link member symmetrical to the first link member is disposed on the side facing the first link member with the base interposed therebetween. The base member is formed with a second link support portion that can rotatably support the rotation support portion of the second link member, and a second magnet is formed on one surface of the second link member. The filter blades or the diaphragm blades are rotated by energizing a second coil that is fixed and disposed on the side facing the second magnet.

  As an eighth means for solving the above problem, the different magnetic poles are attached to the first and second magnets fixed to the first and second link members with the rotation support portion as a boundary. One magnet and the other pair of magnets are fixed, and an attractive force or a repulsive force is generated in the first and second link members by the magnetic flux of the first and second magnets. It is characterized by that.

  Further, as a ninth solving means for solving the above problem, one magnet having one magnetic pole of the first magnet is fixed to the other end of the first link member, Near the other end of the second link member facing the other end of the first link member, the other magnet having the other magnetic pole of the second magnet is fixed, and the first magnet The attraction force that attracts the other end portions of the first and second link members toward each other is generated by one magnet and the other magnet of the second magnet. To do.

  Further, as a tenth solution means for solving the above problem, the shutter blade and the filter blade or the diaphragm blade can be independently rotated by the rotation of the first and second link members. It is characterized by.

  Further, as an eleventh solving means for solving the above problem, the ND filter includes an interference preventing member for preventing the rotating filter blade or the diaphragm blade and the shutter blade from interfering with each other. Alternatively, it is characterized in that the ND filter or the diaphragm unit is disposed within a rotation range between the diaphragm unit and the shutter blade.

  Further, as a twelfth solution means for solving the above-mentioned problem, the ND filter or the diaphragm portion arranged on the upper portion of the shutter blade rotates with the rotation end sliding on the interference member. It is characterized by being made possible.

  As a thirteenth solution for solving the above-mentioned problem, the first and second link members are placed on a yoke having a circular outer shape, and the shutter blades and the A cover member having a circular outer shape is disposed via the filter blade or the diaphragm blade.

    As a fourteenth solution to solve the above-mentioned problem, the cover member can be rotated with the ND filter or the throttle portion positioned at a position facing the opening of the base member. A release hole is formed.

  Further, as a fifteenth solution means for solving the above-mentioned problems, the first and second coils are fixedly formed on an FPC (flexible substrate) drawn out from the base member.

In the shutter device of the present invention, a first link member is disposed outside the base member, and a first magnet is fixed to one surface of the first link member, and the first magnet is supported to rotate. One and the other of the magnetic poles are magnetized at the boundary, and a first coil is disposed on the side facing the first magnet, and the magnetic flux generated by energizing the first coil is one of the first magnets. By acting on the other magnetic flux, the first link member rotates in a seesaw shape with the rotation support portion serving as a fulcrum, and the shutter blade can open and close the opening, so that a thin shutter device can be provided. .
Moreover, since the rotation support part is formed in the link gravity center of the 1st link member, even if an impact etc. are added from the outside, it can prevent that a 1st link member rotates.

The shutter blade is formed in a thin plate shape, and a support portion that can be supported by the shutter support portion of the base member and an engagement portion that can be engaged with the shutter drive portion of the first link member are formed. When the rotation of the first link member is transmitted to the engaging portion via the shutter driving portion, the first link member rotates in the direction opposite to the rotation direction of the first link member with the support portion as a fulcrum. The shutter blade can be reliably rotated by the small rotational force of the member.
Further, since the shutter blade is thin and has a small mass, it can be prevented from rotating even when an impact or the like is applied from the outside.

  The shutter driving part of the first link member is formed in a protruding shape, the engaging part of the shutter blade is formed in a long hole shape, and the shutter driving part is engaged when the first link member rotates. Since the shutter blades are slid in the direction to open and close the opening with the support portion as a fulcrum, the shutter blades can be rotated more reliably.

  Further, the base member is formed with a first link guide portion protruding from the base portion, a first link support portion is formed on the first link guide portion, and the first link member is disposed outside the outer peripheral portion of the base portion. Since the rotation support portion is supported by the first link support portion, the shutter blade can be rotated by the first link member located outside the base portion, and a shutter device that can be thinned is provided. it can.

  Also, the base member is formed with a blade guide portion protruding from the base portion, and the shutter blade is supported by the shutter support portion formed in the blade guide portion. Therefore, the shutter blade is guided by the blade guide portion and the shutter support portion. As a fulcrum, the opening can be reliably rotated in the opening / closing direction.

  In addition, the blade guide portion of the base member is formed with a projecting filter support portion. The filter support portion includes a filter blade with an ND filter attached thereto, or a throttle portion having a small-diameter hole smaller than the aperture diameter. Attached diaphragm blades are rotatably supported, and the amount of light passing through the opening can be adjusted by the ND filter or diaphragm, so the ND filter or diaphragm has a small-diameter hole that can be reliably and accurately opened. A diaphragm operation capable of adjusting the amount of light passing through the section can be performed.

  The base member is formed with a second link support portion capable of supporting the second link member. The second magnet is fixed to one surface of the second link member, and the side facing the second magnet. Since the filter blades or diaphragm blades are rotated by energizing the second coil disposed in the filter, the filter blades or diaphragm blades are reliably rotated to adjust the amount of light passing through the opening with high accuracy. can do.

  Further, the first and second magnets fixed to the first and second link members are fixed with one and the other pair of magnets with different magnetic poles magnetized with the rotation support portion as a boundary. Since the two link members generate an attractive force or repulsive force by the magnetic flux of the first and second magnets, an attractive force or repulsive force is generated corresponding to different characteristics for each product variety. The degree of freedom of design can be improved.

  Further, the one magnet of the first magnet and the other magnet of the second magnet generate an attractive force that attracts the other end portions of the first and second link members toward each other. The shutter speed at which the blades shield the opening can be increased.

  Further, since the shutter blades and the filter blades or the diaphragm blades can be independently rotated by the rotation of the first and second link members, a shutter device having excellent operability can be provided.

  Further, an interference preventing member for preventing the rotating filter blade or diaphragm blade and the shutter blade from interfering with each other is provided between the ND filter or the diaphragm portion and the shutter blade. Since it is disposed within the moving range, it is possible to prevent the rotating ND filter or the diaphragm portion from rubbing and interfering with the shutter blades, and to achieve a uniform shutter speed without variation.

  Further, the ND filter or the diaphragm portion disposed on the upper portion of the shutter blade is configured to rotate with the rotation end sliding on the interference member. Or interference with a diaphragm part and a shutter blade can be prevented.

  The first and second link members are mounted on a yoke having a circular outer shape, and a cover member having a circular outer shape is disposed on the base member via a shutter blade and a fill blade or a diaphragm blade. Therefore, the shutter blades and filter blades or diaphragm blades can be arranged inside the circular shape, and the magnets and coils that can be driven and operated can be arranged efficiently. A large shutter device can be provided.

  In addition, the cover part material is formed with an open hole that can be rotated by positioning the ND filter or the throttle portion at a position facing the opening of the base member. Thickness can be absorbed. Therefore, the thickness can be further reduced.

  Further, since the first and second coils are fixedly formed on an FPC (flexible substrate) drawn out from the base member, assembly is easy.

  Hereinafter, an embodiment of a shutter device according to the present invention will be described with reference to FIGS. 1 is an exploded perspective view of a first embodiment of the present invention, FIG. 2 is a partial plan view of FIG. 1, FIG. 3 is a plan view for explaining the inside of FIG. 1, and FIG. 5 is a side view of FIG. 4, FIG. 6 is an exploded perspective view of a shutter device according to a second embodiment of the present invention, and FIG. 7 is a partial plan view of FIG. FIG. 8 is a partial plan view of FIG.

First, the shutter device 21 according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 5. A yoke 22 formed in a circular shape having an outer diameter of approximately 9 mm is provided at the bottom. The yoke 22 is made of a magnetic material such as a steel plate.
The yoke 22 has a donut shape in which an opening 22a into which a circular base portion 26b of a base member 26 (to be described later) can be fitted is formed at the center.
Further, the yoke 22 is formed with notches 22b and 22b at portions facing each other on the front side and the back side of the drawing, respectively, and a first flat portion 22c on the right side of the cutout portion 22b and a second flat surface on the left side of the drawing. Each part 22d is formed in an arc shape.

Moreover, the 1st link member 23 formed in circular arc shape is mounted on the 1st plane part 22c. The first link member 23 has a rotation support portion 23a formed of a through hole at a substantially central portion in the arcuate longitudinal direction.
Further, the first link member 23 has a protruding shutter driving portion 23b protruding at a predetermined height at the rear end portion in the figure, and a first magnet 24a made of a permanent magnet on the surface which is one surface is first. It is positioned at the positioning portion 23c of the one link member 23 and fixed with an adhesive or the like.

The arc-shaped first magnet 24a is formed by molding a resin material kneaded with magnetic metal powder, for example, and the S pole, which is one magnetic pole, with the rotation support portion 23a of the first link member 23 as a boundary, The other magnetic pole, the N pole, is magnetized.
Further, a substantially semicircular escape portion 24b is formed at a portion where the rotation support portion 23a is located, to which a first link guide portion 26c of the base member 26 described later can be loosely fitted. The first magnet 24a fixed to the first link member 23 is positioned by a positioning portion formed at the other end 23c, the other end 23c is magnetized to the S pole, and the shutter drive 23b is closer. An N pole is magnetized on one end side of each.

Further, a second link member 25 formed symmetrically with the first link member 23 is placed on the second flat surface portion 22 d of the yoke 22. The second link member 25 is formed with a rotation support portion 25a formed of a through hole at a substantially central portion in the arcuate longitudinal direction.
The second link member 25 is formed with a filter drive portion 25b having the same shape as the shutter drive portion 23b of the first link member 23 at the rear end in the figure, and a first magnet on the surface which is one surface. A second magnet 24c formed symmetrically with 24a is positioned and fixed by a positioning portion formed at the other end 25c. The other end of the second magnet 24c is magnetized to the N pole, and the end of the second magnet 24c near the filter driving unit 25b is magnetized to the S pole.
The second magnet 24c has a substantially semicircular escape portion 24d formed in a portion where the rotation support portion 25a of the second link member 25 is located.

A base member 26 made of a resin material is disposed on the yoke 22 via first and second link members 23 and 25. In the base member 26, a base portion 26b having an opening portion 26a having a predetermined diameter is formed in a cylindrical shape at a central portion.
The base 26 b is formed with a predetermined diameter and height, and the base 26 b can be fitted into the opening 22 a of the yoke 22. Further, a first link guide portion 26c protrudes from the base portion 26b, and a relief portion 24b of the first magnet 24a fixed to the first link member 23 is positioned on the first link guide portion 26c. .

And the 1st link guide part 26c is formed with the projection-like 1st link support part 26d which can be fitted to the rotation support part 23a of the 1st link member 23 by predetermined height. Further, on the rear side of the base portion 26b, a blade guide portion 27 having a substantially fan shape and a large area is formed so as to protrude outward, and the upper surface of the n blade guide portion 27 is formed flush with the surface of the base portion 26b. The blade guide portion 27 is formed with a shutter support portion 27a on the right side in the drawing and a filter support portion 27b on the left side in the drawing with a predetermined diameter and height.
Further, between the shutter support part 27a and the filter support part 27b, a convex part 27c having a height lower than the support parts 27a and 27b is formed.

On the base portion 26b, a convex portion 26e having the same height as the convex portion 27c is formed at a position facing the convex portion 27c of the blade guide portion 27. In addition, a second link guide portion 28 having the same shape as the first link guide portion 26c is formed in the base portion 26b at a symmetrical position with respect to the first link guide portion 26c.
The second link guide portion 28 is formed with a second link support portion 28a that can be fitted to the rotation support portion 25a of the second link member 25 in the same shape as the first link support portion 26d.
The base member 26 is provided with a thin plate-like shutter blade 29 made of a resin material kneaded with conductive powder such as carbon on the blade guide portion 27 inside the convex portion 27c.

A support portion 29a made of a round hole is formed on the right end portion side of the shutter blade 29 in the figure, and a long hole-like engagement portion 29b is formed on the front side adjacent to the support portion 29a.
Further, the shutter blade 29 is formed with a shielding portion 29c having a large area capable of opening and closing the opening 26a of the base member 26 on one end side on the left side of the drawing.
The shutter blade 29 is assembled by fitting the support portion 29a to the shutter support portion 27a of the base member 26 and engaging the shutter drive portion 23b of the first link member 23 with the engagement portion 29b. .

  Then, the first link member 23 rotates in a seesaw shape with the rotation support portion 23a as a fulcrum, and the shutter drive portion 23b slides while pressing the inner wall of the first engagement portion 29b. As a result, the shutter blade 29 rotates in the direction in which the shield 29c opens and closes the opening 26a with the support 29a as a fulcrum.

Further, a filter blade 30 is disposed above the shutter blade 29, and the filter blade 30 is formed in a thin plate shape with a resin material or the like kneaded with carbon powder in the same manner as the shutter blade 29.
The filter blade 30 is formed with a ring-shaped filter support 30b having an opening 30a having a diameter slightly larger than the opening 26a of the base member 26 on one end side on the right side of the drawing.

Further, the filter blade 30 is formed with a round hole-shaped support portion 30c on the other end side on the left side in the drawing, and a long hole-shaped engagement portion 30d is formed on the near side adjacent to the support portion 30c.
An ND filter 31 having a predetermined thickness that can adjust the amount of light passing through the opening 26a is attached to the filter support 30b with an adhesive or the like.

In addition, on the upper side facing the first and second magnets 24a and 24c attached to the first and second link members 23 and 25, the first and second coils 32a wound in a thin plate shape and substantially elliptical, 32b is disposed. As shown in FIGS. 3 to 5, the first and second coils 32 a and 32 b are fixedly formed on an FPC (flexible substrate) 33 drawn out from the base member 27.
The first and second coils 32 a and 32 b may be printed on the FPC 33.
Further, the cover member 34 covering the upper side of the base member 27 is formed in a circular shape having an outer diameter of approximately 9 mm and is made of a magnetic material such as a tin-plated steel plate. Therefore, it occurs when the first and second coils 32a and 32b are energized. Magnetic flux density can be increased.

An opening hole 34 a is formed in the cover member 34 at a position facing the opening 26 a of the base member 26. The ND filter 31 having a predetermined thickness is positioned in the open hole 34a. When the filter blade 30 is rotated with the support portion 30c as a fulcrum, the ND filter 31 can move in the open hole 34a. Yes.
Such an ND filter 31 has a structure that can cope with a reduction in thickness because the thickness direction is located in the open hole 34a.

  In addition, a pair of long holes 34b and 34b smaller than the opening hole 34a are formed on the left and right sides of the opening hole 34a in the direction orthogonal to the opening hole 34a. In the pair of long holes 34b, the shutter drive unit 23b and the filter drive unit 25b of the first and second link members 23 and 25 are fitted and slidable.

In the assembly of the shutter device 21 of the first embodiment of the present invention having such a configuration, the first link member 23 to which the first magnet 24 a is fixed is placed on the first flat surface portion 22 c of the yoke 22, and The second link member 25 to which the second magnet 24c is fixed is placed on the second flat surface portion 22d.
Next, the base member 26 is placed on the first and second link members 23, 25, and the first link support portion 26d is fitted to the rotation support portion 23a of the first link member 23. The second link support portion 28 a is fitted to the rotation support portion 25 a of the second link member 25. Then, the blade guide portion 27 of the base member 26 is positioned between the shutter drive portion 23b of the first and second link members 23, 25 and the filter drive portion 25b.

Next, the round hole-shaped support portion 29a of the shutter blade 29 is fitted into the protruding shutter support portion 27a of the base member 26, and the shutter drive portion of the first link member 23 is engaged with the engagement portion 29b formed of an elliptical hole. 23b is engaged.
Further, the filter blade 30 with the ND filter 31 attached is placed on the shutter blade 29, and the round hole-shaped support portion 30c of the filter blade 30 is fitted to the filter support portion 27b of the base member 26, and the long The filter driving portion 25b of the second link member 25 is engaged with the second engaging portion 30d having a hole shape.

  Next, when the cover member 34 to which the FPC 33 is attached is aligned with the circular outer periphery of the yoke 22 and placed on the base member 26, the pair of coils 32a and 32b formed on the FPC 33 by printing or the like is used as the base member. 26 is located outside the base 26b. The pair of coils 32 a and 32 b are positioned on the first and second magnets 24 a and 24 b, and the shutter drive unit 23 b and the filter drive unit 25 b of the first and second link members 23 and 25 are elongated holes of the cover member 34. It fits in 34b, 34b.

At this time, the cover member 34 is formed with a gap of a predetermined size between the projection 26e and 27c of the base member 26 and the base member 26, so that the shutter blade 29 and the filter blade 30 are rotatable. ing.
The outer peripheral portion between the yoke 22 and the cover member 34 is covered and fixed with a circular peripheral wall member (not shown), and the thickness dimension from the yoke 22 to the cover member 34 is approximately 1, 5 mm. It is thin.

  In the operation of the shutter device 21 according to the first embodiment of the present invention thus assembled, for example, a magnetic flux generated by energizing the first coil 32a acts on the magnetic flux of the first magnet 24a. Thus, the first link member 23 has the rotation support portion 23a as a fulcrum, and the shutter drive portion 23b on one end side is away from the base portion 26b of the base member 26, and the other end portion 23c is closer to the base portion 26b. It rotates in the clockwise direction shown in the figure.

As a result, the shutter blade 29 rotates in the counterclockwise direction shown in the figure, with the inner peripheral surface of the engaging portion 29b made of an elliptical hole being pushed outward by the shutter driving portion 23b. That is, the shutter blade 29 rotates in the counterclockwise direction opposite to the rotation direction of the first link member 23.
As a result, the shielding portion 29c having a large area rotates in a direction to close the opening 26a, and a shutter operation for completely shielding the opening 26a is performed.
Further, when energization to the first coil 32a is reversed, the first link member 23 is counterclockwise in the direction in which the shutter driving portion 23b approaches the base portion 26b of the base member 26 and the other end portion 23c moves away from the base portion 26b. It rotates in the turning direction. As a result, the shutter blade 29 rotates clockwise with the support portion 29b as a fulcrum, and the shielding portion 29c opens the opening portion 26a.

Further, when the second coil 32b is energized, the second link member 25 rotates clockwise and counterclockwise with the rotation support portion 25a as a fulcrum so that the filter blade 30 rotates. It has become.
With the rotation of the filter blade 30, the ND filter 31 shields the opening 26a, and the amount of light passing through the opening 26a can be adjusted.

In the shutter device 21 according to the first embodiment of the present invention, first and second link members 23 and 25 are disposed outside the base portion 26 b of the base member 26, and the first and second link members 23 and 25 are disposed. The shutter blades 29 and the filter blades 30 can be rotated to open and close the opening 26a by rotating in a seesaw shape using the respective rotation support portions 23a and 25a as fulcrums.
Therefore, the shutter device 21 according to the first embodiment of the present invention can be made as thin as approximately 1.5 mm in thickness as shown in FIG.

The shutter device 41 according to the second embodiment of the present invention will be described with reference to FIGS. 6 to 8. A yoke 42 having a circular outer shape is disposed at the lowermost portion. The yoke 42 has an opening 42a having a predetermined size at the center, and the outer shape is substantially donut-shaped.
For example, four guide protrusions 42b are bent on the inner peripheral surface of the opening 42 so that a circular base 47b of a base member 47 to be described later can be positioned.

The yoke 42 is formed with a flat and donut-shaped plane portion 42c. The yoke 42 is formed in an arc shape on the plane portion 42c and is opposed to each other with a circular base portion 47b of a base member 47 described later. First and second link members 43 and 45 are arranged. The first link member 43 is formed with a projecting rotation support portion 43a at a substantially central portion in the arcuate longitudinal direction.
In the first link member 43, a protruding shutter driving portion 43b is formed at a predetermined height near one end portion on the back side in the drawing, and the other end portion 43c side on the near side in the drawing is formed in an elongated arc shape. .

Further, a first magnet 44 composed of one and the other pair of magnets 44a and 44b, which is formed of a permanent magnet and having a substantially rectangular shape, is fixed to the surface of the first link member 43 with an adhesive or the like.
The one and the other pair of magnets 44a and 44b are magnetized with different magnetic poles. For example, one magnet 44a is magnetized to the S pole and fixed at a position near the other end 43c, and the other magnet 44b. Is magnetized to the N pole and is fixed to a position closer to one end portion on the shutter drive portion 43b side than the rotation support portion 43a.

Further, the second link member 45 is formed symmetrically with the first link member 43, and a rotation support portion 45a is formed to protrude at a substantially central portion in the arc-shaped longitudinal direction.
The second link member 45 has a filter driving portion 45b having the same shape as the shutter driving portion 43b protruding from the one end portion of the first link member 43 facing the shutter driving portion 43b. The 45c side is formed in an elongated arc shape. Further, the first magnet 46 composed of one and the other pair of magnets 46 a and 46 b, which is the same as the first magnet 44, is fixed to the surface of the second link member 45.
Then, for example, one magnet 46a is magnetized to the S pole and fixed at a position near one end on the filter drive unit 45b side, and the other magnet 46b is magnetized to the S pole and located at a position near the other end 45c. It is fixed.

A base member 47 made of a resin material that rotatably supports the first and second link members 43 and 45 is disposed on the yoke 42. The base member 47 is formed with a base 47b that protrudes downward in the figure in a substantially cylindrical shape having an opening 47a having a predetermined diameter at the center.
The base 47b is formed with a predetermined diameter and height, and the outer peripheral portion can be positioned by the guide protrusion 42b of the yoke 42.

From the cylindrical base 47b, a first link guide part 48, a connecting part 49, a second link guide part 50, and a wide blade guide part 51 are formed so as to protrude from a ring-shaped peripheral wall 52 of the outer peripheral part. It is connected.
Then, between the base 47 b and the peripheral wall 52, open portions 47 c and 47 d are formed on both sides of the first link guide portion 48, and open portions 47 e and 47 f are formed on both sides of the second link guide portion 50. Has been. In addition, a pair of coil guides 47g are formed to protrude on the surface of the base 47b on the right side of the second link guide portion 50 in the drawing.

The first link guide portion 48 is formed with a first link support portion 48a formed through a hole into which the rotation support portion 43a of the first link member 43 can be fitted. A pair of guideable coil guides 48b is formed. When the rotation support portion 43a is fitted to the first link support portion 48a, one magnet 44a of the first magnet 44 is positioned in the opening portion 47d, and the other magnet 44b and the shutter drive portion 43b are the opening portion. It is located at 47c.
Further, the second link guide portion 50 is formed with a second link support portion 50a made of a hole into which the rotation support portion 45a of the second link member 45 can be fitted, and a second coil described later. A pair of guideable coil guides 50b is formed. Then, when the rotation support portion 45a is fitted to the second link support portion 50a, one magnet 46a and the filter driving portion 45b of the second magnet 46 are positioned in the open portion 47e, and the other magnet 46b is the open portion. It is located at 47f.

The base member 47 is formed with a flat blade guide portion 51 having a large area between the base portion 47 b on the side facing the connecting portion 49 and the peripheral wall 52.
On the flat blade guide portion 51, a shutter blade 54, which will be described later, is mounted so as to be rotatable in a direction to shield the opening 47.
Further, a shutter support 51a is formed on the right side of the blade guide 51 in the drawing, and a filter support 51b is formed on the left side in the drawing with a predetermined diameter and height. A portion where the filter support portion 51b is formed is higher than the surface of the blade guide portion 51 by a predetermined dimension to form a filter guide portion 51c.
On the surface of the base portion 47b, an elongated receiving portion 53 is formed so as to be one step higher, and a pair of guide protrusions 53a and 53b are formed to protrude from the front side of the receiving portion 53 in the drawing.
Further, the base member 47 is provided with a thin shutter blade 54 made of a resin material kneaded with conductive powder such as carbon on the surface of the flat blade guide portion 51.

The shutter blade 54 is formed with a support portion 54a formed of a round hole at the center of rotation on the right end portion side of the figure, and a groove-like engagement portion 54b opened adjacent to the support portion 54a is formed. Has been. Further, the shutter blade 54 is formed with a large shielding portion 54c on one end side on the left side in the drawing, which can open and close the opening 47a of the base member 47.
In such a shutter blade 54, the support portion 54a is fitted to the shutter support portion 51a of the base member 47 in a state where the shielding portion 54c is placed on the blade guide portion 51, and the engagement portion 54b is connected to the first link. The member 43 is assembled by being engaged with the shutter driving portion 43b.

Further, on the receiving portion 53 on the surface of the base portion 57b, a thin and elongated interference preventing member 55 made of a resin material kneaded with conductive powder such as carbon is placed, and the base member is made of an adhesive or the like. 47 is fixed.
The interference preventing member 55 is formed with a hole-like support portion 55a that can be fitted to the shutter support portion 51a on one end side on the back side in the figure, and guides to the guide portions 53a and 53b on the other end side. Thus, a positioning portion 55b that can be positioned is formed.
When the interference preventing member 55 is mounted on the receiving portion 53 by fitting the supporting portion 55a to the shutter supporting portion 51a that is inserted through the supporting portion 54a of the shutter blade 54, the positioning portion 55b guides. The movement is regulated by positioning between the portions 53a and 53b.

  A thin plate-like filter blade 56 made of a resin material kneaded with conductive powder such as carbon is disposed on the shielding portion 54c of the shutter blade 54. The filter blade 56 is disposed on the left end side in the drawing. A support portion 56a made of a round hole is formed at the center of rotation, and a groove-like engagement portion 56b having an open front side is formed adjacent to the support portion 56a.

Further, the filter blade 56 has a rotation end 56c formed by extending a predetermined dimension in the right direction in the drawing, and the opening 47a when the support 56a is rotated in a state of being fitted to the filter support 51b. The rotation end 56c is formed in a length that does not shield the screen.
An ND filter 57 to which the fixing portion 57a is fixed with an adhesive or the like is disposed on the rotating end portion 56c. The ND filter 57 is formed with a shield portion 57b having a substantially circular shape and a large area, and an end portion 57c protruding slightly from the shield portion 57b to the right side in the drawing is positioned on the interference member 55 so as to be slidable. ing.

Further, on the upper side facing the first and second magnets 44 and 46 attached to the first and second link members 43 and 45, first and second coils 58 wound in a thin plate shape and substantially elliptical, 59 is disposed.
The first and second coils 58 and 59 are integrated with an FPC (flexible substrate) 60 by bonding or the like. The first coil 58 is guided and positioned by the side surface of the receiving portion 53 of the base member 47 and the coil guide 48b, and the second coil 59 is guided and positioned by the coil guides 47g and 50b of the base member 47. ing.

The FPC 60 extending from the first and second coils 58 and 59 positioned at a predetermined position of the base member 47 is drawn out from the connecting portion 49 of the base member 47 to the outside.
A cover member 61 is attached to the upper side of the base member 47 by adhesion or the like, and covers the pair of coils 58 and 59 and the ND filter 57 mounted on the base member 47.
An opening hole 61 a for the ND filter 57 is formed in the cover member 61 at a position facing the opening 47 a of the base member 47. Then, the filter blade 56 rotates in a state where the filter blade 56 is in contact with the lower surface of the cover member 61, so that the ND filter 57 can rotate in the open hole 61a.

  Further, a notch 61b is formed in contact with the opening 61a, and the shutter driving portion 43b of the first link member 43 is positioned in the notch 61b so as to be rotatable. In addition, an elliptical hole 61c is formed on the left side of the opening hole 61a in the figure, and the film driving part 45b of the second link member 45 is positioned in the elliptical hole 61c so as to be rotatable. In addition, a round hole 61d is formed on the back side of the elliptical hole 61c, and the filter support portion 51b of the base member 47 is inserted into the round hole 61d.

In the shutter device 41 according to the second embodiment of the present invention having such a configuration, the rotation support portion 43 a of the first link member 43 is changed to the first link support portion 48 a of the first link guide portion 48 of the base member 47. When fitted and supported, one magnet 44a of the first magnet 44 is positioned at the opening 47d, the other magnet 44b is positioned at the opening 47c, and the first link member 43 uses the rotation support 43a as a fulcrum. It is free to rotate.
When the rotation support portion 45a of the second link member 45 is fitted and supported on the second link support portion 50a of the second link guide portion 50 of the base member 47, one magnet 46a of the second magnet 46 is opened. In addition, the other magnet 46b is positioned at the opening 47f, and the second link member 45 is pivotable about the pivot support 45a.

Further, the shutter hole 43b of the first link member 43 projecting upward from the opening 47c is engaged with the long hole-shaped engagement portion 54b of the shutter blade 54 placed on the blade guide portion 51. It has become.
When the first link member 43 rotates around the rotation support portion 43a with the support portion 54a of the shutter blade 54 fitted and supported by the shutter support portion 51a of the base member 47, the shutter blade 54 is supported. The shielding part 54c rotates around the part 51a as a fulcrum, so that the opening 47a can be opened and closed.

Further, the shutter drive portion 45b of the second link member 45 protruding upward from the opening portion 47e is engaged with the long hole-like engagement portion 56b of the filter blade 56 placed on the filter guide portion 51c. It has become.
When the second link member 45 rotates around the rotation support portion 45a in a state where the support portion 56a of the filter blade 56 is fitted and supported on the filter support portion 51b of the base member 47, the filter blade 56 is supported. It rotates on the shutter blade 54 with the portion 56a as a fulcrum.

With the rotation of the filter blade 56, the end portion 57c of the ND filter 57 slides on the interference prevention member 55, and the shielding portion 57b of the ND filter can open and close the opening portion 47a.
Therefore, it is possible to prevent the filter blades 56 from interfering with the shutter blades 54 and to eliminate variations in the rotational speeds of the shutter blades 54 and the ND filter 57.
The shutter device 41 of the second embodiment having such a configuration is configured to have the same height of 1.5 mm as the shutter device 21 of the first embodiment.

The operation of the shutter device 41 according to the second embodiment of the present invention is such that, for example, a magnetic flux generated by energizing the first coil 58 in one direction causes one of the first magnets 44 and the other magnet 44a. , 44b.
Thus, the first link member 43 has the rotation support portion 43a as a fulcrum, and the shutter drive portion 43b on one end side is away from the base portion 47b of the base member 47, and the other end portion 43c is closer to the base portion 47b. It rotates in the clockwise direction shown in the figure.

As a result, the shutter blade 54 rotates in the counterclockwise direction shown in the figure, with the inner peripheral surface of the engaging portion 54b being pushed outward by the rotating shutter drive portion 43b, and with the support portion 54a as a fulcrum.
In other words, the shutter blade 54 rotates in the direction opposite to the rotation direction of the first link member 43.
Then, the shutter blade 54 rotates counterclockwise with the support portion 54a as a fulcrum, so that the large-area shielding portion 54c rotates in a direction to close the opening portion 47a, and the shielding portion 54c completely opens the opening portion 47a. The shutter operation can be performed. Further, when energization to the first coil 58 is reversed, the first link member 43 rotates in the counterclockwise direction, and the shutter blade 54 rotates in the clockwise direction with the support portion 54a as a fulcrum, thereby shielding the screen. The part 54c opens the opening 47a.

Further, when the second coil 59 is energized, the second link member 45 rotates clockwise and counterclockwise with the support portion 45a as a fulcrum so that the filter blade 56 rotates. It has become.
With the rotation of the filter blade 56, the ND filter 57 shields the opening 47a, and the amount of light passing through the opening 47a can be adjusted. Since the rotating end of the ND filter 57 slides on the interference preventing member 55, the filter blade 56 does not rub against the shutter blade 54 and interfere with it.

Further, the shutter device 41 is fixed at a position near the other end portion 43c of the first link member 43, for example, one magnet 44a of the first magnet 44 magnetized with the S pole as one magnetic pole, and the second magnet 44a. An attractive force is generated in the other magnet 46b of the second magnet 46 fixed to the position of the link member 45 near the other end 45c, for example, the N pole as the other magnetic pole. The other end portions 43c and 45c of the two link members 43 and 45 are attracted in a direction approaching each other.
Therefore, it is possible to speed up the shutter operation in which the shutter blade 54 shields the opening 47a.

  In addition, although not shown in the figure, at the positions near the other end portions 43c and 45c of the first and second link members 43 and 45, for example, one of the first magnets 44 in which the S pole that is one magnetic pole is magnetized The magnet 44a and one magnet 46a of the second magnet 46 similarly magnetized with the S pole may be fixed so that a repulsive force is generated between the magnets. Such an arrangement of magnets can be applied to the shutter device 21 of the first embodiment.

  The shutter device 41 in which a suction force or a repulsive force is generated at the other end portions 43c and 45c of the first and second link members 43 and 45, even when the coils 58 and 59 are not energized. The shutter blade 54 and the ND filter 57 can be biased in the direction of opening or closing the opening 47a, and can be selectively used in accordance with the characteristics of the shutter device, so that the degree of freedom of design is widened. Can do.

In the second embodiment of the present invention, the rotation support portion 43a of the first link member 43 is formed in a round protrusion shape, and the first link support portion 48a fitted to the rotation support portion 43a is round. Although described with the hole, the rotation support part 43a may be a round hole and the first link support part 48a may be formed in a protruding shape.
Further, the shutter support portion 51a of the base member 47 is formed in a projecting shape and the support portion 54a of the shutter blade 54 is described as a round hole. However, the shutter support portion 51a is a round hole and the support portion 54a is a projecting shape. It may be formed.
Further, in place of the filter blades in the first and second embodiments of the present invention, a diaphragm blade having a diaphragm portion (not shown) having a small diameter hole smaller than the diameter of the opening formed in the base member is arranged. It may be set up.

It is a disassembled perspective view of the shutter apparatus of the 1st Embodiment of this invention. FIG. 2 is a partial plan view of FIG. 1. It is a top view explaining the inside of FIG. It is a top view of FIG. FIG. 5 is a side view of FIG. 4. It is a disassembled perspective view of the shutter apparatus of the 2nd Embodiment of this invention. FIG. 7 is a partial plan view of FIG. 6. FIG. 7 is a partial plan view of FIG. 6. It is a disassembled perspective view of the conventional shutter apparatus.

Explanation of symbols

21 Shutter device 22 of the present invention Yoke 22a Opening 23 First link member 23a Support part 23b Shutter drive part 24a First magnet 24b Second magnet 25 Second link member 25a Support part 25b Filter drive part 26 Base member 26a Opening part 26b Base 26c First link guide part 26d First link support part 27 Blade guide part 27a Shutter support part 27b Filter support part 28 Second link guide part 28a Second link support part 29 Shutter blade 29a support part 29b Engaging part 29c Shielding part 30 Filter blade 32a First coil 32b Second coil 33 FPC
34 Cover member 34a Open hole 34b Long hole

Claims (15)

A base member having a base formed with an opening having a predetermined aperture, a shutter blade supported by a shutter support portion of the base member and rotatable in a direction to open and close the opening, and the shutter blade rotating A first link support portion capable of pivotally supporting the first link member disposed on the outer side of the base portion.
The first link member is formed with a rotation support portion that can be supported by the first link support portion, and the one end side and the other end side in a state where the rotation support portion is supported by the first link support portion. And can be turned like a seesaw,
A first magnet is fixed to one surface of the first link member, and the first magnet has one and the other magnetic poles magnetized with the rotation support portion as a boundary, and faces the first magnet. A first coil is disposed on the side, and a magnetic flux generated by energizing the first coil acts on a magnetic flux of the one and the other magnetic poles of the first magnet, whereby the first link member is A shutter device that rotates in the shape of a seesaw using a rotation support portion as a fulcrum, and the shutter blades can open and close the opening.   A shutter driving unit capable of rotating the shutter blade is formed on one end side of the first link member, and the shutter blade is formed in a thin plate shape and supported by the shutter support portion of the base member. A support portion capable of engaging with the shutter drive portion of the first link member and an engagement portion engageable with the shutter drive portion of the first link member, wherein the shutter blade rotates the first link member via the shutter drive portion. 2. The shutter device according to claim 1, wherein, when transmitted to the engagement portion, the shutter device rotates in a direction opposite to a rotation direction of the first link member with the support portion as a fulcrum.   The shutter drive part of the first link member is formed in a protrusion shape, the engagement part of the shutter blade is formed in a long hole shape, and when the first link member rotates, the shutter drive part is 3. The shutter device according to claim 2, wherein the shutter blade slides in an opening / closing direction with the support portion as a fulcrum by sliding the inner peripheral surface of the engagement portion. The base member is formed with a first link guide portion protruding from the base portion, and the first link support portion is formed on the first link guide portion,
The said 1st link member is arrange | positioned on the outer side of the outer peripheral part of the said base, The said rotation support part is supported by the said 1st link support part, The any one of Claim 1 thru | or 3 characterized by the above-mentioned. The shutter device according to 1.   5. The base member according to claim 1, wherein a blade guide portion protruding from the base portion is formed on the base member, and the shutter blade is supported on the shutter support portion formed on the blade guide portion. The shutter device described.   The blade guide portion of the base member is formed with a projecting filter support portion. The filter support portion has a filter blade having an ND filter attached thereto, or a throttle portion having a small-diameter hole smaller than the opening diameter. The shutter device according to claim 5, wherein a diaphragm blade attached with an aperture is rotatably supported, and the amount of light passing through the opening can be adjusted by the ND filter or the diaphragm.   A second link member symmetrical to the first link member is disposed on the side facing the first link member with the base interposed therebetween, and the base member is supported to rotate the second link member. A second link support portion capable of rotatably supporting the portion is formed, a second magnet is fixed to one surface of the second link member, and a second link support portion is disposed on the side facing the second magnet. The shutter device according to claim 6, wherein the filter blade or the diaphragm blade is rotated by energizing two coils.   The first and second magnets fixed to the first and second link members are fixed with one and the other pair of magnets magnetized with the different magnetic poles with the rotation support portion as a boundary. 8. The shutter device according to claim 7, wherein an attractive force or a repulsive force is generated on the first and second link members by the magnetic fluxes of the first and second magnets.   Near the other end of the first link member, one magnet having one magnetic pole of the first magnet is fixed, and the second link member is opposed to the other end of the first link member. The other magnet with the other magnetic pole of the second magnet is fixed to the other end of the second magnet, and the one magnet of the first magnet and the other magnet of the second magnet 9. The shutter device according to claim 8, wherein the attraction force attracts the other end portions of the first and second link members in a direction approaching each other.   10. The shutter blade and the filter blade or the diaphragm blade can be independently rotated by the rotation of the first and second link members, respectively. The shutter device described.   An interference preventing member for preventing the rotating filter blade or the diaphragm blade and the shutter blade from interfering with each other is provided between the ND filter or the diaphragm portion and the shutter blade. The shutter device according to claim 6, wherein the shutter device is disposed within a rotation range of the diaphragm portion.   12. The ND filter or the diaphragm portion disposed on the upper portion of the shutter blade is configured such that a rotation end portion is slidable on the interference member and is rotatable. The shutter device described.   The first and second link members are mounted on a yoke having a circular outer shape, and a cover member having a circular outer shape is disposed on the base member via the shutter blade and the filter blade or the diaphragm blade. The shutter device according to claim 7, wherein the shutter device is disposed.   14. The cover member is formed with an open hole in which the ND filter or the throttle portion is positioned and rotatable at a position facing the opening of the base member. Shutter device. The shutter device according to any one of claims 7 to 14, wherein the first and second coils are fixedly formed on an FPC (flexible substrate) drawn outward from the base member.

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