JP2007060730A - Driver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a versatile driver for the shutter member of a camera, or the like, which can be miniaturized. <P>SOLUTION: The driver comprises a rotor equipped with different magnetic poles in the circumferential direction, a rotating shaft supporting the rotor rotatably, a coil arranged along the outer circumferential surface and the opposite end faces of the rotor and driving the rotor, and a yoke opposing the outer circumferential surface of the rotor wherein the yoke is arranged to surround the rotor. A coil frame having a bearing is provided at the axial end of the rotor, and the output shaft is provided with an output portion having at least one end side projecting from the coil frame in the axial direction. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a driving device that rotates movable members such as a camera shutter member, a diaphragm member, and an ND filter (attenuating filter) member over a predetermined angular range.

  Conventionally, as a driving device for rotating a movable member over a predetermined angle range, upper and lower coil frames are provided at both ends of a rotor attached to a rotating shaft, and coils are wound around the recesses of the upper and lower coil frames. The coil is arranged along the surface and the end surfaces on both sides. Further, the lower coil frame is formed with a window portion over the operating angle range of the movable member, which restricts the operating range of the movable member, and an arc-shaped yoke piece according to the shape of the window portion. Is arranged to restrict the magnetic movement of the movable member (see, for example, Patent Document 1).

Japanese Utility Model Publication No. 7-14443

  However, in the drive device shown in Patent Document 1, since the coil is wound so as to cover the rotating shaft on a coil frame that supports the rotor magnet and winds the coil, an output shaft is provided inside the coil. In addition, there is a problem of increasing the size because the length in the axial direction becomes longer. Therefore, it is difficult to incorporate it into a small device.

  Moreover, since the coil is wound on the rotating shaft, a movable member or the like cannot be attached directly from the rotating shaft. That is, in order for the movable member to move, a window portion must be formed in the lower frame coil over the operating angle range of the movable member, which takes time for production and the operating angle range is limited by the shape of the window portion. In other words, there is a problem that the versatility to the device to be incorporated is low.

  In view of the above problems, an object of the present invention is to provide a drive device that can be miniaturized and has a wide versatility.

  In order to solve the above-described problems, in the present invention, a rotor having different magnetic poles in the circumferential direction, a rotating shaft that rotatably supports the rotor, an outer peripheral surface of the rotor, and end faces on both sides are provided. In the drive device comprising the coil arranged to drive the rotor and the yoke facing the outer peripheral surface of the rotor, the yoke is arranged so as to surround the rotor, The rotor is provided with a coil frame having a bearing portion at an end in the axial direction, and the rotary shaft is provided with an output portion protruding at least one end side from the coil frame in the axial direction. To do.

  According to the present invention, in the drive device in which the periphery of the rotation shaft that rotatably supports the rotor is surrounded by the yoke, the rotation shaft includes the output portion that protrudes from the coil frame at one end side. Can be provided outside the coil wound around the coil frame. Therefore, the drive device is shortened and the device can be miniaturized.

  Furthermore, since the movable member attached to the output part does not have a movement restricting part such as a conventional window part on its rotation track, the movable member can rotate by 0 ° to 360 ° or more. .

  Moreover, according to this invention, it is preferable that the said coil is wound with the inclination angle with respect to the rotation center axis line of the said rotating shaft which penetrates the said bearing part of the said coil frame.

  According to this invention, the dimension in the axial direction can be compressed. In addition, the coil is arranged parallel to the rotation center axis on the outer peripheral side of the rotor, and the coil is wound obliquely so as to avoid the bearing portion on the end surface of the rotor, so that the dimension in the axial direction can be compressed, and A reduction in rotational torque can be prevented.

  According to the present invention, it is preferable that a rotating member for outputting the rotation of the rotor from the rotor toward the outside in the radial direction is attached to the output portion.

  According to this invention, the rotating member is attached to the output portion. Since the rotation restricting member is not provided in the circumferential direction of the output portion, the rotating member attached to the rotating shaft can rotate 360 ° or more.

  According to the present invention, it is preferable that a part of the surface of the yoke is a protruding wall protruding from the coil frame as a mechanical stopper of the rotor. Moreover, it is preferable that the one part surface of the said coil frame is a protruding wall protruded in the direction in which the said output part was formed as a mechanical stopper of the said rotor. Furthermore, it is preferable that the mechanical stopper includes a first mechanical stopper that regulates rotation in one direction of the rotor and a second mechanical stopper that regulates rotation in the other direction.

  According to the present invention, a projecting wall that functions as a mechanical stopper of a rotor can be formed simply by using a yoke processed into a predetermined shape and a coil frame processed into a predetermined shape, so that the component transmission can be reduced, In addition, since the configuration can be avoided, the cost can be reduced.

  Further, according to the present invention, the yoke is arranged so as to surround the rotor, and at a predetermined position in the circumferential direction, the yoke is arranged close to the rotor when the coil is not energized. It is preferable to include a first magnetic stopper and a second magnetic stopper that define a natural stop position wider than a prescribed range of the mechanical stopper by a magnetic attractive force generated during

  According to the present invention, by bringing the yoke close to the rotor at a predetermined position in the circumferential direction, a magnetic attractive force is generated between the yoke and the rotor when the coil is not energized, so that the natural stop position of the rotor is set. A magnetic stopper is defined. Therefore, since the magnetic stopper can be configured only by using the yoke processed into a predetermined shape, the number of parts can be reduced, and the complexity of the configuration can be avoided, so that the cost can be reduced. In addition, since the magnetic stopper is formed only by the partial proximity of the yoke, the yoke surrounds the entire periphery or substantially the entire rotor, so that there is an advantage that leakage of magnetic flux is small.

  Further, according to the present invention, the rotor is held by the first magnetic stopper at a stop position defined by the first mechanical stopper in a non-energized state of the coil, and the second magnetic stopper In the stop position defined by the mechanical stopper, the position is preferably held by the second magnetic stopper.

  According to this invention, the stop position of the rotor can be set at an arbitrary position regardless of the magnetic configuration. Also in this case, the rotor is held at the stop position defined by the mechanical stopper by the magnetic attractive force acting between the rotor and the magnetic stopper.

In the drive device according to the present invention, in the drive device in which the periphery of the rotation shaft that rotatably supports the rotor is surrounded by a yoke, the rotation shaft includes a projection output portion that protrudes at one end side from the coil frame. The output unit can be provided outside the coil wound around the coil frame.
Therefore, the drive device is shortened and the device can be miniaturized.
Furthermore, the movable member attached to the output unit can be set to an arbitrary angle because the movement restricting unit is not disposed on the rotation track.

[Embodiment 1]
(overall structure)
1A and 1B are a front view and a longitudinal sectional view, respectively, showing a configuration of a shutter plate driving device according to Embodiment 1 of the present invention. 2A and 2B are a front view and a longitudinal sectional view, respectively, showing the configuration of a motor device (drive device) that constitutes the drive unit of the shutter plate drive device shown in FIG.

  1A and 1B, a shutter plate driving device 1 according to the present embodiment is for opening and closing a diaphragm opening 4 by driving a shutter plate 3 in an imaging device such as a digital camera or a camera-equipped mobile phone. In the shutter plate driving device 1, a shutter plate 3 is disposed on the object side of a frame 2 that accommodates a lens and the like, and a motor device 10 is disposed on the side of the frame 2.

  As shown in FIGS. 2A and 2B, the motor device 10 includes a columnar rotor 12 having magnetic poles (N pole and S pole) that are different in the circumferential direction, and a diagonally upper right side of the rotor 12. The coil 16 is disposed so as to extend along the outer peripheral surface of the rotor 12 and the end surfaces on both sides thereof, and the yoke 14 that faces the outer peripheral surface of the rotor 12 is provided. In the present embodiment, the coil 16 may be wound from the upper left side.

  The rotor 12 includes a rotating shaft 121 having a large diameter portion 122 at the central portion in the axial direction, and a cylindrical permanent magnet 128 fixed around the large diameter portion 122 of the rotating shaft 121. The permanent magnet 128 has an N pole on one side across the rotation center axis L, and an S pole on the other side. In the rotor 12, an arm portion 19 (rotating member) extends from one side in the axial direction, and the rotating operation of the arm portion 19 is transmitted directly or indirectly to the shutter plate 3 shown in FIG. It is like that.

A first coil frame 17 and a second coil frame 18 are disposed on both sides of the rotor 12 in the axial direction. The first coil frame 17 is formed with a bearing hole 172 that rotatably supports one end side of the rotary shaft 121, and the second coil frame 18 rotatably supports the other end side of the rotary shaft 121. A bearing hole 182 is formed. The rotary shaft 121 is formed with an output portion 220 (output shaft) that extends through the bearing hole 182 and is longer in the axial direction than the cutout portion 18 a of the second coil frame 18.
The coil 16 is wound around the first slope 174a formed in the recess 174 of the first coil frame 17 and the second slope 184b formed in the recess 184 of the second coil frame 18, and in this state The coil 16 extends obliquely on the outer peripheral surface and both end surfaces of the rotor 12. That is, the coil is arranged on the outer peripheral side of the rotor 12 so as to intersect with the rotation center axis L of the rotary shaft 121 in a three-dimensional manner, and the coil is inclined at the end face of the rotor so as to avoid the bearing portions (bearing holes 172 and 182). Winding.

  When the yoke 14 is cut in a direction orthogonal to the rotation center axis L, the cut surface is a substantially regular square, and when the arm portion 19 is at an intermediate position shown by a solid line in FIG. The boundary surfaces 200 and 210 of the magnetic pole are in a state facing the corners of a regular square. Here, the central portions of the four sides 143a, 143b, 143c, and 143d of the yoke 14 are closer to the outer peripheral surface of the rotor 12 compared to the corner portions 141a, 141b. In this embodiment, the four sides 143a, Of 143b, 143c, and 143d, the central portion of the two sides 143a and 143c functions as a first magnetic stopper. Also, the two proud sides 143b and 143d function as a second magnetic stopper. That is, if the rotor 12 rotates 45 ° counterclockwise CCW, the center of one magnetic pole of the rotor 12 approaches the side 143a, and the center of the other magnetic pole approaches the side 143c. The central portions of the sides 143a and 143c function as a first magnetic stopper that defines the natural stop position of the rotor 12 by the magnetic attractive force generated between the sides 143a and 143c. The remaining two sides 143b and 143d function as a second magnetic stopper. That is, when the rotor 12 rotates 45 ° clockwise CW, the center of one magnetic pole of the rotor 12 approaches the side 143d, and the center of the magnetic pole of the other pole of the rotor 12 approaches the side 143b. The central part of the two sides 143b and 143d functions as a second magnetic stopper that defines the natural stop position of the rotor 12 by the magnetic attractive force generated between the two sides 143b and 143d.

  The arm portion 19 is attached to the output portion 220 formed on the rotating shaft 121 so as to be rotatable and so as not to interfere with the coil 16 wound around the coil frame 18 in this turning locus.

  The arm portion 19 is attached to the upper end of the rotation shaft 121 that protrudes upward from the second coil frame 18 in the rotation center axis L direction. That is, it is possible to set the rotation angle according to a mechanical stopper attached at an arbitrary position.

  In this embodiment, as a mechanical stopper, a part of the yoke 14 protrudes in the direction of the second coil frame 18 as shown in FIGS. It acts as a protruding wall. Therefore, this protruding wall is formed as a mechanical stopper 190 (190a, 190b) for the arm portion 19. For this reason, when the rotor 12 rotates clockwise CW so that the arm 19 moves from the intermediate position shown in FIG. 2A to the position shown by the one-dot chain line in FIG. Since the side end portion comes into contact with the one side end portion 14a of the yoke 14, the one side end portion 14a functions as a first mechanical stopper 190a. On the other hand, the rotor 12 rotates counterclockwise CCW so that the arm 19 moves from the intermediate position indicated by the solid line in FIG. 2A to the position indicated by the two-dot chain line in FIG. At this time, the opposite side end portion of the arm portion 19 comes into contact with the other side end portion 14b of the yoke 14, so that the other side end portion functions as the second mechanical stopper 190b.

  Here, the first mechanical stopper 190a and the second mechanical stopper 190b only need to be formed by protruding a part of the yoke (or left during processing). It is good also as two protrusion shape protruded by the predetermined width.

(Operation)
In the shutter plate driving device 1 configured as described above, assuming that the arm portion 19 is at an intermediate position indicated by a solid line in FIG. Electromagnetic force is applied according to Fleming's left-hand rule, and the rotor 12 and the arm portion 19 rotate clockwise CW. As shown in FIG. The portion stops at a position where it abuts on one end 14a (first mechanical stopper 190a) of the yoke 14.

  Even at such a stop position, the rotary body 12 stops at a position in contact with the side 143a and the side 143c (first magnetic stopper). Even in such a stop position, since a magnetic attractive force acts between the rotating body 12 and the sides 143a and 143c (first magnetic stopper), even when the energization to the coil 16 is stopped, The rotating body 12 is held in a state in which the arm portion 19 is in contact with the one side end portion 14a (first mechanical stopper 190a) of the yoke 14. In this state, as shown in FIG. 1, the aperture 4 is opened by the shutter plate 3.

  When a current in the other direction is applied to the coil 16 from this state, electromagnetic force acts on the rotor 12 according to the Fleming left-hand rule, and the rotor 12 and the arm portion 19 rotate counterclockwise CCW, and FIG. The arm 19 is stopped at a position where the side end of the arm 19 abuts against the one end 14d (second mechanical stopper 190b) of the yoke 14, as indicated by a two-dot chain line in a).

  Even in such a stop position, since a magnetic attractive force acts between the rotating body 12 and the sides 143b and 143d (second magnetic stopper), even when the energization to the coil 16 is stopped, The rotating body 12 is held in a state in which the arm portion 19 is in contact with the one side end portion 14b (second mechanical stopper 190b) of the yoke 14. In this state, the aperture 4 is closed by the shutter plate 3 as shown in FIG.

  Therefore, by controlling the energization of the coil 16, the rotating body 12, the arm portion 19, and the shutter plate 3 can be rotated over a predetermined angle range, so that the aperture opening 4 can be opened and closed.

The coil 16 extends obliquely on the outer peripheral surface and both end surfaces of the rotor 12. That is, the coil is wound obliquely at an arbitrary angle so as to avoid the bearing portions (bearing holes 172 and 182). Therefore, any angle theta, the flux L, and the execution flux and L _1, execution flux L ₁ of the present embodiment has a value of LCOSshita. The effective magnetic flux L ₁ is reduced compared to the magnetic flux L, but is necessary and sufficient for driving the shutter plate driving device 1.

(Main effects of this form)
As described above, in the shutter plate driving device 1 of the present embodiment, the yoke 14 is disposed so as to surround the rotor 12, and the output of the rotating shaft 121 is projected from the coil frame 14 in the axial direction. Part 220 is provided. That is, in the drive device in which the periphery of the rotating shaft 121 that rotatably supports the rotor 12 is surrounded by the yoke 14, the rotating shaft 121 includes the output portion 220 that protrudes from the coil frame 18 at one end side. The shaft can be provided at a position where it does not interfere with the coil 16 wound around the coil frame 18. Therefore, the drive device is shortened and the device can be miniaturized. Moreover, since the movable member attached to the output part 220 does not arrange | position the movement control part in the rotation track | orbit, the rotor 12 can be rotated over a predetermined angle range.

  Moreover, since the output part 220 is provided in the rotating shaft 12, components, such as a pulley, a gear, a lever, a cam, a boss | hub, a coupling, can be easily attached to this output part, and versatility expands. Moreover, since these shutter plate driving devices 1 need only be attached to the output unit 220 after being assembled, the assembly efficiency is high.

  In addition, the coil 16 is perpendicular to the intermediate angle between the two natural stop positions (open / close positions) of the shutter plate 3 and is wound obliquely with respect to a plane parallel to the axis. There is no bias. Further, since the coil is wound obliquely with respect to the rotating shaft 121, interference with the rotating shaft 121 can be avoided.

  Further, since the coil 16 is disposed obliquely (for example, with an inclination of 45 ° or less) with respect to the rotation center axis L of the bearing portion (bearing holes 172 and 182), the configuration in this way can reduce the dimension in the axial direction. It can be compressed. Further, since the coil is wound obliquely so as to avoid the bearing portions (bearing holes 172 and 182), the dimension in the axial direction can be compressed and the reduction in rotational torque can be prevented.

  Further, in order to mechanically restrict the rotation angle of the rotor 12, the protruding wall (mechanical stopper 190) of the rotor can be formed simply by using the yoke 14 processed into a predetermined shape, so that the number of parts can be reduced. In addition, since the configuration can be avoided, the cost can be reduced.

  Furthermore, in order to magnetically regulate the rotation angle of the rotor 12, it is only necessary to form the yoke 14 in a substantially square shape and magnetically interfere the yoke sides 143a to 143d with the permanent magnet 128. Since the number of parts can be reduced and the complexity of the configuration can be avoided, the cost can be reduced.

  The rotation angle range of the rotor 12 is defined by the side end portions 14a and 14b (mechanical stoppers 190a and 190b) of the yoke 14, and is defined by the sides 143a, 143b, 143c and 143d (magnetic stoppers). The rotation angle range of the rotor 12 is narrower. In other words, the rotational angle range of the rotor 12 defined by the sides 143a, 143b, 143c, 143d (magnetic stopper) is designed to be wider than the rotational angle range of the rotor 12 defined by the mechanical stoppers 190a, 190b. Has been. Therefore, in the shutter plate driving device 1 of the present embodiment, the rotational angle range of the rotating body 12 can be arbitrarily set by the position of the mechanical stopper regardless of the magnetic configuration such as the shape of the yoke 14. it can. Even in this case, the rotor 12 is held by the magnetic stopper at the stop position defined by the mechanical stopper even when the coil 16 is not energized.

  Further, since the magnetic stopper is configured only by the yoke 14 being partially close to the rotor 12, the magnetic stopper rotates unlike a configuration in which a plurality of arcuate yoke pieces are arranged at positions spaced apart in the circumferential direction. Since the entire periphery of the child 12 is surrounded by the yoke 14, there is an advantage that leakage of magnetic flux is small.

[Modification of Embodiment 1]
FIG. 3 is a front view showing the configuration of a motor device (drive device) that constitutes the drive unit of the shutter plate drive device 1 according to a modification of the first embodiment of the present invention. Since the basic configuration of the motor device of this embodiment and any of the embodiments to be described later is the same as that of the first embodiment, common portions are denoted by the same reference numerals and illustrated. Detailed description is omitted.

  In the motor device shown in FIG. 3, the yoke 14 has a substantially hexagonal cut surface when cut in a direction perpendicular to the rotation center axis L, and the arm portion 19 is at an intermediate position shown by a solid line in FIG. The center of the magnetic pole is in a state facing the hexagonal sides 143a and 143b. Here, the two corners 145a and 145b of the yoke 14 are formed on the protrusions 145a and 145b protruding in the direction of the rotor 12 by pressing or the like. The protrusions 145a and 145b are closer to the outer peripheral surface of the rotor 12 than the sides 143a and 143c. In this embodiment, the corners 145a and 145b are rotated by 180 ° (90 ° left and right). It functions as a magnetic stopper when rotating one by one.

  Further, the rotation angle range of the rotor 12 is restricted by the side end portions 14a and 14b (mechanical stoppers 190a and 190b) of the yoke 14.

  Even in the shutter plate driving device 1 configured as described above, the rotor 12 is held by the magnetic stopper at the stop position defined by the mechanical stopper 190 even when the coil 16 is not energized. Therefore, the shutter plate 3 can be held in the open position or the closed position without using a complicated mechanism.

  That is, the magnetic stopper may be formed so that the position of the magnetic stopper is wider than that of the mechanical stopper 190 according to the rotation angle of the rotor 12, and can correspond to a rotation angle of 0 ° to 360 ° or more. It is.

[Embodiment 2]
FIG. 4 is a front view showing a configuration of a motor device (drive device) that constitutes the drive unit of the shutter plate drive device 1 according to Embodiment 2 of the present invention.

  In the motor device 10 shown in FIG. 4, the yoke 14 has a substantially circular cut surface when cut in a direction perpendicular to the rotation center axis L, and the arm portion 19 is at an intermediate position shown by a solid line in FIG. 4. The boundary surface 200 of the magnetic pole and the boundary surface 210 of the magnetic pole are in a state along the center line C of the arm portion 19. When the coil 16 is energized, the rotor 12 rotates in one direction or the other direction.

  The rotation angle range of the rotor 12 is regulated by the side end portions 14a and 14b (mechanical stoppers 190a and 190b) of the yoke 14.

  In the shutter plate driving device 1 configured as described above, the rotor 12 has a stop position defined by the mechanical stopper 190 when the coil 16 is not energized. In this embodiment, no magnetic stopper is used, and the magnetic stopper is stopped at the magnetic equilibrium point. Therefore, in this embodiment, the shutter plate 3 can be swung by a simpler mechanism and production process.

[Modification of Embodiment 2]
FIG. 5 is a longitudinal sectional view showing a configuration of a motor device (drive device) that constitutes a drive unit of the shutter plate drive device 1 according to a modification of the second embodiment of the present invention.

  In the motor device 10 shown in FIG. 5, an arm portion 19 (rotating member) is attached to the output portion 220 of the rotating shaft 121. A connecting portion 300 to which the shutter plate 3 shown in FIG. 1 is attached is formed on the arm portion 19 in a direction opposite to the direction in which the rotor 12 is located.

  Further, a stopper 900 is formed on the arm portion 19 toward the rotor 12. When the rotor 12 rotates, the stopper 900 is formed so as to interfere with a position holding portion 1900 formed to protrude from the yoke 14 in the outer diameter direction. Therefore, the stopper 900 and the position restricting portion 1900 function as a mechanical stopper 900 for the rotor 12.

  The stopper 900 may be formed in a rod shape, and the other position restricting portion 1900 may have a flange shape, the stopper 900 may have a rod shape or a flange shape, and the position holding member may have a rod shape.

  In the shutter plate driving device 1 configured as described above, the rotor 12 has a stop position defined by the mechanical stopper 190 when the coil 16 is not energized. In this embodiment, no magnetic stopper is used, and the shutter plate 3 can be swung by a simpler mechanism.

[Embodiment 3]
FIG. 6 is a longitudinal sectional view showing a configuration of a motor device (drive device) that constitutes a drive unit of the shutter plate drive device 1 according to Embodiment 3 of the present invention.

  In the motor device 10 shown in FIG. 6, an arm portion 19 (rotating member) is attached to the output portion 220 of the rotating shaft 121. A connecting portion 300 to which the shutter plate 3 shown in FIG. 1 is attached is formed on the arm portion 19 in a direction opposite to the direction in which the rotor 12 is located. A yoke 14 that surrounds the rotor 12 is also provided.

  A coil frame 18 attached to a position that does not interfere with the rotation locus of the arm portion 19 is attached to the rotation shaft.

  A position restricting portion 1900 is formed from the coil frame 18 toward the arm portion 19, and the position restricting portion 1900 is extended to a position that interferes with the rotation locus of the arm portion 19.

  The position restricting portion 1900 may be either a rod shape or a flange shape.

  Even in the shutter plate driving device 1 configured as described above, the rotor 12 is held by the magnetic stopper at the stop position defined by the mechanical stopper 190 even when the coil 16 is not energized. Therefore, the shutter plate 3 can be held in the open position or the closed position without using a complicated mechanism.

[Embodiment 4]
FIG. 7 is a longitudinal sectional view showing a configuration of a motor device (drive device) that constitutes a drive unit of the shutter plate drive device 1 according to Embodiment 4 of the present invention.

  In the motor device 10 shown in FIG. 7, the arm portion 19 (rotating member) is attached to the output portion 220 of the rotating shaft 121. A connecting portion 300 to which the shutter plate 3 shown in FIG. 1 is attached is formed on the arm portion 19 in a direction opposite to the direction in which the rotor 12 is located. Further, a yoke 14 having a substantially square cut surface that surrounds the rotor 12 with sides 143a to 143d is provided. Thus, in the present embodiment, the yoke 14 is assumed to be formed in a polygon.

  Further, a stopper 900 is formed on the arm portion 19 toward the rotor 12. When the rotor 12 rotates, the stopper 900 stops when it abuts against the side 143a (not shown) of the yoke 14 or the side 143d. That is, the stopper 900 constitutes a side portion (sides 143a to 143d) forming the yoke 14 and a mechanical stopper 190.

  The stopper 900 may be in a rod shape or other shapes.

  In the shutter plate driving device 1 configured as described above, the rotor 12 has a stop position defined by the mechanical stopper 190 when the coil 16 is not energized. In this embodiment, no magnetic stopper is used, and the shutter plate 3 can be swung by a simpler mechanism.

[Embodiment 5]
FIG. 8 is a diagram showing a configuration of the shutter plate driving device 1 according to Embodiment 5 of the present invention.

  In the shutter plate driving device 1 shown in FIG. 8, the position regulating members 900 a and 900 b may be provided on the frame 2 in accordance with the opening / closing position of the shutter plate 3. The position restricting members 900a and 900b constitute a mechanical stopper 190.

  In this embodiment, the rotor 12 is held by the magnetic stopper at the stop position defined by the mechanical stopper even when the coil 16 is not energized. Therefore, the shutter plate 3 can be held in the open position or the closed position without using a complicated mechanism.

[Embodiment 6]
FIG. 9 is a longitudinal sectional view showing a configuration of a motor device (drive device) that constitutes a drive unit of the shutter plate drive device 1 according to Embodiment 6 of the present invention.

  In the motor device 10 shown in FIG. 9, the coil 16 is formed in the first groove 174 a (first coil winding frame) formed in the recess 174 of the first coil frame 17 and the recess 184 of the second coil frame 18. The coil 16 is wound over the formed second groove 184a (second coil winding frame), and in this state, the coil 16 extends obliquely to the outer peripheral surface and both end surfaces of the rotor 12.

  In this embodiment, the rotor 12 is held by the magnetic stopper at the stop position defined by the mechanical stopper even when the coil 16 is not energized. Therefore, the shutter plate 3 can be held in the open position or the closed position without using a complicated mechanism.

[Other embodiments]
Note that, in the form shown in FIG. 10 and the like, the coil 16 may be configured to have both windings. That is, the coil 16 of Example 1 is wound symmetrically in the axial direction. Also in this case, it is possible to adopt embodiments up to the first to fifth embodiments (including modified examples).

The coil 16 extends obliquely so as to be wound on both the outer peripheral surface and both end surfaces of the rotor 12. That is, the coil is wound obliquely at an arbitrary angle so as to avoid the bearing portions (bearing holes 172 and 182). Therefore, any angle theta, the flux L, and the execution flux and L _1, execution flux L ₁ of the present embodiment has a value of 2LCOSshita. This execution magnetic flux L ₁ is necessary and sufficient for driving the shutter plate driving device 1.

  In any of the above-described embodiments, the coil may be wound by a machine, or a formed coil wound in an air-core shape may be fixed to the coil frames 17 and 18 or may be bonded and fixed.

  In any of the above forms, when the coil 16 is wound around the coil frames 17 and 18, it may be wound so that one turn alternately intersects obliquely or alternately so as to intersect every few turns. You may turn.

  Furthermore, the coils 16 may be alternately wound obliquely for each layer, or may be wound so as to alternately intersect every several layers.

  In the first and third to fifth embodiments, the rotation of the rotor 12 may be restricted and held at the magnetic equilibrium point of the permanent magnet 128 without using the magnetic stopper.

  In the said form 1-5, you may utilize the structure loaded with the impact relaxation member which relieves an impact, or the member provided with the impact relaxation property as a mechanical stopper with respect to a mechanical stopper.

  In the first to fifth embodiments, the yoke is constituted by one component. However, a plurality of arcuate yoke pieces and flat yoke pieces may be arranged around the rotor.

  In Embodiments 1 to 5 described above, the motor device of the driving device 1 for the shutter plate in the camera has been described as an example. The present invention may be applied to a motor device.

  Moreover, in the said forms 1-5, although the axis has penetrated the 2nd coil frame 18, it does not need to penetrate. In this case, the other end side of the arm portion 19 is attached so as not to protrude from the coil.

(A), (b) is the front view and longitudinal cross-sectional view which respectively show the structure of the shutter board drive device which concerns on Embodiment 1 of this invention. (A), (b) is the front view and longitudinal cross-sectional view which respectively show the structure of the motor apparatus (drive device) which comprises the drive part of the shutter plate drive device shown in FIG. It is a front view which shows the structure of the motor apparatus (drive device) which concerns on the modification of Embodiment 1 of this invention. It is a front view which shows the structure of the motor apparatus (drive device) which concerns on Embodiment 2 of this invention. It is a longitudinal cross-sectional view which shows the structure of the motor apparatus (driving device) which concerns on the modification of Embodiment 2 of this invention. It is a longitudinal cross-sectional view which shows the structure of the motor apparatus (drive device) which concerns on Embodiment 3 of this invention. It is a longitudinal cross-sectional view which shows the structure of the motor apparatus (drive device) which concerns on Embodiment 4 of this invention. It is a front view which shows the structure of the shutter plate drive device 1 which concerns on Embodiment 5 of this invention. It is a longitudinal cross-sectional view which shows the structure of the motor apparatus (drive device) which concerns on Embodiment 6 of this invention. It is a longitudinal cross-sectional view which shows the structure of the motor apparatus (drive device) which concerns on other embodiment.

Explanation of symbols

10 Motor device (drive device)
12 Rotor 14 Yoke 16 Coil 17 Coil frame 18 Second coil frame 19 Arm (rotating member)
121 Rotating shaft 143a to 143d side (magnetic stopper)
172, 182 Bearing hole (bearing part)
190 Mechanical stopper, protruding wall 220 Output section L Rotation center axis

Claims (8)

A rotor having different magnetic poles in the circumferential direction, a rotating shaft that rotatably supports the rotor, and a coil that is arranged along the outer peripheral surface and both end surfaces of the rotor to drive the rotor And a drive device comprising a yoke facing the outer peripheral surface of the rotor,
The yoke is disposed so as to surround the rotor, and includes a coil frame having a bearing portion at an end portion in the axial direction of the rotor, and the rotary shaft has an axial direction than the coil frame. Is also provided with an output part projecting at least one end side,
A drive device characterized by that.   The drive device according to claim 1, wherein the coil is wound at an inclination angle with respect to a rotation center axis of the rotation shaft that penetrates the bearing portion of the coil frame.   The drive device according to claim 1, wherein a rotating member that outputs rotation of the rotor from the rotor toward a radially outer side is attached to the output unit.   2. The drive device according to claim 1, wherein a part of the surface of the yoke is formed on a protruding wall that protrudes from the coil frame as a mechanical stopper of the rotor.   The drive device according to claim 1, wherein a part of the surface of the coil frame is a protruding wall that protrudes in a direction in which the output portion is formed as a mechanical stopper of the rotor.   The mechanical stopper includes a first mechanical stopper that regulates rotation in one direction of the rotor and a second mechanical stopper that regulates rotation in the other direction. Item 6. The driving device according to Item 4 or 5.   The yoke is arranged so as to surround the rotor, and a magnetic force generated between the rotor and the rotor when the coil is not energized in a predetermined position in the circumferential direction is close to the rotor. The drive device according to claim 1, further comprising a first magnetic stopper and a second magnetic stopper that define a natural stop position wider than a predetermined range of the mechanical stopper by an attractive force. The rotor is held by the first magnetic stopper at a stop position defined by the first mechanical stopper in a non-energized state of the coil, and is stopped by the second mechanical stopper. The driving device according to claim 4, wherein the position is held by the second magnetic stopper.

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