JP2010256473A - Driving characteristic adjustment mechanism - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily and accurately adjust operational characteristic of a light shielding blade. <P>SOLUTION: The driving characteristic adjustment mechanism for a driving mechanism 100 is provided. The driving mechanism 100 includes a rotor 101 composed of a permanent magnet, and a yoke having leg parts arranged to be opposed to the peripheral surface of the rotor 101, and performs opening/closing operation of the light shielding blade coupled to a driving pin 106 provided to the rotor 101 by moving the driving pin 106 back and forth as the rotor 101 turns, wherein the yoke 102 is provided to turn with the center of rotation of the rotor 101 as center, and a projection 112 making energizing force for turning the yoke 102 in a predetermined direction act on the yoke 102, and a screw 114 and screw hole 116 energizing the yoke 102 in an opposite direction to the predetermined direction and turning the yoke 102 against the energizing force by the projection 112 are provided. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a drive characteristic adjusting mechanism for a drive mechanism that opens and closes a light shielding blade.

  2. Description of the Related Art Conventionally, some shutters, diaphragms, and the like provided in an imaging apparatus have an exposure amount adjusted by operating the light shielding blade so as to open and close a diaphragm opening formed by the light shielding blade. The operation of the light shielding blade that opens and closes the aperture opening can be realized by, for example, the reciprocating motion of the rotor in the driving device that operates the light shielding blade.

  Conventionally, in a motor-driven shutter that opens and closes a shutter blade (light-shielding blade) by reciprocating rotation of a rotor made of a permanent magnet, an end surface facing the circumferential surface of the rotor is formed on an arc surface concentric with the rotor. A substantially U-shaped yoke having two leg portions and a coil wound around at least one of the leg portions constitute a motor stator, and the stator is a base portion of the yoke and a part of the stator is shuttered. There has been an adjustment mechanism for a camera lens shutter that is mounted in contact with the guide portion of the main plate and that the contact surface thereof is a circular arc surface concentric with the rotor (for example, see Patent Document 1 below) .)

  In such a camera lens shutter adjustment mechanism, when adjusting the operating characteristics of the shutter blades (light-shielding blades), the screws that are the attachment means for attaching the base portion of the yoke to the shutter base plate are loosened, and the tip of a tweezers or the like is used. Push the base of the yoke from the side, measure the operating characteristics of the shutter blades (light-shielding blades) while shifting the yoke on a circular arc surface concentric with the rotor, and fix the yoke at a position where the operating characteristics are appropriate As a result, the operating characteristics of the shutter blades (light-shielding blades) are adjusted.

JP-A-8-114832

  However, in order to ensure the adjustment accuracy of the operating characteristics of the shutter blades (light-shielding blades) in the conventional technology described above, it is desirable to perform the adjustment work while actually operating the shutter blades (light-shielding blades). In the prior art, there is a problem that it is difficult to perform the adjustment work without loosening the attachment means for fixing the yoke and the base plate. For this reason, the conventional technology described above has a problem that it is difficult to adjust the operating characteristics of the shutter blades while operating the shutter blades (light-shielding blades), and it is difficult to ensure high adjustment accuracy.

  Specifically, in the above-described conventional technique, since a permanent magnet is used, at least when a magnetic path is formed in the yoke, a force is generated in the direction of attracting the ground plane or repelling the ground plane. To do. For this reason, it is difficult to stabilize the relative position between the yoke and the ground plate in a state where the attaching means for fixing the yoke and the ground plate is loosened, and it is difficult to ensure high adjustment accuracy. Further, in a state where the shutter blade (light-shielding blade) is operated, it is more difficult to stabilize the relative position between the yoke and the base plate, so it is difficult to ensure high adjustment accuracy.

  Further, in the above-described conventional technology, when adjusting the operating characteristics of the shutter blades (light-shielding blades), in order to shift the yoke with respect to the ground plate, the work is performed while pushing the yoke using a tool such as tweezers. It will be. For this reason, fine adjustment is difficult, and the position of the yoke with respect to the ground plane cannot be adjusted accurately due to excessive pressing, and it is difficult to ensure high adjustment accuracy.

  Furthermore, in the above-described conventional technology, the operating characteristics of the shutter blade (light-shielding blade) are adjusted only by the operator pressing the yoke with a tool such as tweezers against the base plate. If it is too much, it cannot return to the state before it was pushed too much. For this reason, when it pushes too much, it may be re-started from the assembly | attachment operation | work of a main plate and a yoke. As described above, the above-described conventional technique has a problem in that it is inferior in workability for adjusting the operation characteristics of the shutter blade (light-shielding blade).

  In recent years, with the miniaturization of an imaging apparatus, the manufacturing accuracy required for each part constituting the imaging apparatus is increasing. Although the manufacturing accuracy of each part is improved, the manufacturing accuracy required for each part constituting the imaging apparatus is high, and fine adjustment is essential when manufacturing each part constituting the imaging apparatus. From such a background, the above-described conventional technology that cannot satisfy the required manufacturing accuracy has a high rate of occurrence of nonconforming products that do not satisfy the required accuracy, resulting in an increase in manufacturing cost. there were.

  An object of the present invention is to provide a drive characteristic adjustment mechanism for a drive mechanism that can easily and accurately adjust the operation characteristic of an optical member in order to eliminate the above-described problems caused by the prior art.

  In order to solve the above-described problems and achieve the object, the drive characteristic adjusting mechanism of the drive mechanism according to the present invention has a rotor made of a permanent magnet and legs arranged so as to face the circumferential surface of the rotor. A drive characteristic adjusting mechanism of a drive mechanism that reciprocates the optical member as the rotor rotates, and is provided so that the yoke can be rotated about the rotation center of the rotor A biasing means for applying a biasing force for rotating the yoke in a predetermined direction with respect to the yoke; and biasing the yoke in a direction opposite to the predetermined direction, and a biasing force by the biasing means. And a yoke position adjusting means for rotating the yoke against this.

  In the drive characteristic adjusting mechanism of the drive mechanism according to the present invention, in the above invention, the urging means is provided integrally with a ground plate supporting the yoke, and the urging force is applied by its own elastic force. It is characterized by.

  In the drive characteristic adjusting mechanism of the drive mechanism according to the present invention, in the above invention, the biasing means is provided integrally with one end of the ground plate supporting the yoke, and the other end is one leg portion of the yoke. And an elastic member provided between the one end and the other end so as to be elastically deformable.

  In the drive characteristic adjusting mechanism of the drive mechanism according to the present invention, in the above invention, the yoke position adjusting means includes a screw hole that holds the screw that is screwed with a screw that is in contact with the yoke. The yoke is rotated against the urging force of the urging means by adjusting the screwing amount of the screw with respect to the screw hole.

  According to the drive characteristic adjustment mechanism of the drive mechanism according to the present invention, there is an effect that the operation characteristic of the light shielding blade can be adjusted easily and accurately.

It is explanatory drawing which shows the drive characteristic adjustment mechanism of the drive mechanism of Embodiment 1 concerning this invention. It is explanatory drawing which shows a part of drive characteristic adjustment mechanism of the drive mechanism of Embodiment 1 concerning this invention. It is explanatory drawing which shows operation | movement of the yoke 102 in the drive characteristic adjustment mechanism of the drive mechanism of Embodiment 1 concerning this invention. It is explanatory drawing which shows the drive characteristic adjustment mechanism of the drive mechanism of Embodiment 2 concerning this invention. It is explanatory drawing which shows the drive characteristic adjustment mechanism of the drive mechanism of Embodiment 3 concerning this invention. It is explanatory drawing which shows the drive characteristic adjustment mechanism of the drive mechanism of Embodiment 4 concerning this invention. It is explanatory drawing which shows the drive characteristic adjustment mechanism of the drive mechanism of Embodiment 5 concerning this invention. It is explanatory drawing which shows the drive characteristic adjustment mechanism of the drive mechanism of Embodiment 6 concerning this invention.

  Exemplary embodiments of a drive characteristic adjusting mechanism according to the present invention will be explained below in detail with reference to the accompanying drawings.

(Embodiment 1)
First, the drive characteristic adjusting mechanism of the drive mechanism according to the first embodiment of the present invention will be described. The drive characteristic adjustment mechanism of the drive mechanism according to the first embodiment of the present invention adjusts the drive characteristic of the light shielding blade in the drive mechanism that drives the light shielding blade, such as a shutter mechanism and a diaphragm mechanism mounted on the imaging device or the lens device. To do.

  FIG. 1 is an explanatory diagram showing a drive characteristic adjusting mechanism of the drive mechanism according to the first embodiment of the present invention. FIG. 2 is an explanatory diagram showing a part of the drive characteristic adjusting mechanism of the drive mechanism according to the first embodiment of the present invention. 1 and 2, the drive characteristic adjusting mechanism according to the first embodiment of the present invention is provided in the vicinity of the drive mechanism 100.

  The drive mechanism 100 includes a rotor 101 and a yoke 102 and is provided on the main plate 103. The base plate 103 can be realized by a plate-like member having an annular shape having an opening 104 to be shielded from light at the center. The driving mechanism 100 is provided in the ground plate 103 between the outer peripheral edge of the ground plate 103 and the outer peripheral edge of the opening 104 to be shielded from light.

  The base plate 103 is preferably formed of a black resin material that imparts light shielding properties. Specifically, the base plate 103 can be molded using a resin material such as polycarbonate. The material forming the base plate 103 is not limited to polycarbonate.

  The rotor 101 in the drive mechanism 100 has an annular shape, and is positioned with respect to the ground plane 103 by inserting a support protrusion 105 provided on the ground plane 103. The rotor 101 is made of a permanent magnet, and is provided so as to be rotatable with respect to the main plate 103 around the support protrusion 105. That is, the support protrusion 105 becomes the rotation center of the rotor 101. The rotor 101 is provided with a drive pin 106. The drive pin 106 is provided integrally with the rotor 101 and reciprocates (repetitively) within a predetermined angle range as the rotor 101 rotates.

  The drive pin 106 passes through the opening 104 provided in the base plate 103 and protrudes from the rotor 101 to the back surface side. In the base plate 103, a light shielding blade (not shown) is provided on the back side of the rotor 101. The drive pin 106 is connected to the light shielding blade on the back surface side of the rotor 101 in the base plate 103. As a result, the shutter blades operate so as to open and close the opening 104 to be shielded with light as the rotor 101 reciprocates.

  The light shielding blade can be realized by a diaphragm blade that forms a diaphragm opening in a diaphragm device, for example. In this case, the aperture 104 to be shielded is realized by the aperture opening. Further, the light shielding blade may be realized by, for example, a shutter blade that forms a shutter opening in the shutter device. In this case, the opening 104 to be shielded is realized by the shutter opening.

  In the first embodiment, an optical member that reciprocates as the rotor 101 rotates can be realized by the light shielding blade. The optical member that reciprocates with the rotation of the rotor 101 is not limited to the light shielding blade. Optical members that reciprocate with the rotation of the rotor 101 are all those that reciprocate in a lens device, such as an optical filter (IR filter, etc.) insertion / removal operation with respect to the optical path and a fixed aperture insertion / removal operation. An optical member can be realized by the member.

  The yoke 102 in the drive mechanism 100 has a substantially U shape including two legs 107 and 108 that constitute a magnetic pole. In the yoke 102, the tip portions of the two leg portions 107 and 108 constituting the magnetic pole have a curved shape along the peripheral surface of the rotor 101 so as to surround the outer periphery of the rotor 101. The surfaces of the two legs 107 and 108 that face the circumferential surface of the rotor 101 are curved so as to form an arc concentric with the rotor 101, respectively.

  The yoke 102 only needs to include a leg portion disposed so as to face the circumferential surface of the rotor, and is not limited to a shape having a substantially U shape. Instead of the yoke 102 having a substantially U shape, for example, a yoke having a substantially D shape or a substantially linear shape may be used.

  The yoke 102 is provided on the main plate 103 with the tip portions of the two leg portions 107 and 108 facing the peripheral surface of the rotor 101. A gap 109 having a predetermined dimension is provided between the tip portions of the two leg portions 107 and 108 of the yoke 102 and the peripheral surface of the rotor 101.

  The dimension of the gap 109 can be arbitrarily set depending on, for example, the torque required for the drive mechanism 100, the shape and material of each part constituting the drive mechanism 100, and the like. The method for setting the dimension of the gap 109 is a known technique and will not be described.

  A coil 110 is provided on one leg 107 of the yoke 102 so as to be wound around the one leg 107. A wiring (not shown) is connected to the coil 110, and a current is supplied through the wiring. The current is supplied when a predetermined operation is performed on the imaging device, such as when an operation is performed on the aperture device included in the imaging device, or when a release button on the shutter device is operated.

  In the drive mechanism 100, when a current in a predetermined direction is supplied to the coil 110, a magnetic path in a predetermined direction is formed in the yoke 102. In other words, in the drive mechanism 100, a current in a predetermined direction flows through the coil 110 when an operation is performed on a diaphragm device included in the imaging device or when a release button in a shutter device included in the imaging device is operated. . In the rotor 101, when a current in a predetermined direction flows through the coil 110, the light shielding blade connected to the drive pin 106 of the rotor 101 rotates in a direction to close the opening 104 to be shielded.

  Further, in the driving mechanism 100, when the operation is performed on the aperture device included in the imaging device or when a predetermined time has elapsed since the release button in the shutter device included in the imaging device is operated, the coil 110 is predetermined. Current flows in the direction opposite to the direction. When a current in the direction opposite to the predetermined direction is supplied to the coil 110, a magnetic path in the direction opposite to the predetermined direction is formed in the yoke 102. In the rotor 101, the direction in which the light shielding blade connected to the drive pin 106 of the rotor 101 opens the opening 104 to be shielded when a current in a direction opposite to a predetermined direction flows through the coil 110. Rotate to.

  The base plate 103 is provided with wall portions 111 and protrusions 112. The wall portion 111 and the protrusion 112 are integrally provided on the main plate 103. Specifically, for example, the base plate 103 provided with the wall portion 111 and the protrusion 112 can be formed by injection molding using a resin material. The wall portion 111 of the base plate 103 has a shape curved in an arc shape along the shape of the outer side of the one leg portion 107 of the yoke 102. As a result, the wall 111 is curved so as to form an arc concentric with the rotor 101.

  The protrusion 112 on the base plate 103 is provided so as to contact the yoke 102 placed on the base plate 103 from the side opposite to the wall portion 111. The protrusion 112 has a shape protruding from the outer peripheral surface of the yoke 102 placed on the base plate 103 toward the wall 111 when the yoke 102 is attached to the base plate 103.

  Thereby, the protrusion 112 contacts the outer peripheral surface of the yoke 102 placed on the main plate 103, and deforms in a direction away from the wall portion 111 by contacting the yoke 102. In a state where the protrusion 112 is deformed in the direction away from the wall portion 111, an urging force that presses the yoke 102 against the wall portion 111 is applied to the yoke 102 by its own restoring force.

  A contact surface 113 is provided at a position on the edge side of the opening 104 to be shielded from light on the base plate 103 in the base portion of the yoke 102. The protrusion 112 causes a biasing force to press the yoke 102 against the wall portion 111 against the yoke 102 by bringing the tip into contact with the contact surface 113. The tip of the protrusion 112 is preferably circular or spherical so as to make point contact with the contact surface 113.

  In addition, the tip of the screw 114 is in contact with the protrusion 102 a provided at a position on the outer peripheral side of the base plate 103 in the base portion of the yoke 102. The screw 114 is screwed into a screw hole 116 provided in a support portion 115 provided in the base plate 103. The tip end of the screw 114 moves in a direction to contact the yoke 102 when the screw 114 is screwed in a tightening direction with respect to the screw hole 116, and moves the yoke 102 in a direction to contact the protrusion 112 and the wall 111. Energize. In this embodiment, the yoke position adjusting means can be realized by the screw 114 and the screw hole 116.

(Operation of Yoke 102 in Drive Characteristic Adjustment Mechanism)
Next, the operation of the yoke 102 in the drive characteristic adjusting mechanism of the drive mechanism 100 according to the first embodiment of the present invention will be described. FIG. 3 is an explanatory diagram showing the operation of the yoke 102 in the drive characteristic adjusting mechanism of the drive mechanism 100 according to the first embodiment of the present invention.

  In FIG. 3, when the screw 114 is screwed in the tightening direction (see the arrow 201) with respect to the screw hole 116, the screw 114 moves in the direction in which the tip of the screw 114 contacts the yoke 102 (see the arrow 202). Moving. When the screw 114 is screwed in the tightening direction with respect to the screw hole 116 (see the arrow 201), the yoke 102 is urged and supported in the direction of contact with the protrusion 112 and the wall 111. It rotates in the direction of arrow A with respect to the base plate 103 around the protrusion 105. At this time, a biasing force in the direction of arrow 203 is applied to the protrusion 112 by the yoke 102.

  The tip of the screw 114 moves in a direction away from the yoke 102 when the screw 114 is rotated in the direction of loosening the screw hole 116. With respect to the yoke 102, the position on the outer peripheral side of the base plate 103 at the base portion of the yoke 102 is brought into contact with the tip of the screw 114 with the support projection 105 as the center by the restoring force of the projection 112 and the wall 111. The urging force in the direction is acting. When the biasing force is used to rotate the screw 114 in the direction of loosening the screw hole 116, the yoke 102 rotates in the arrow B direction around the support protrusion 105.

(Driving characteristics adjustment work)
Next, a drive characteristic adjustment operation in the drive mechanism 100 using the drive characteristic adjustment mechanism of the drive mechanism 100 according to the first embodiment of the present invention will be described. The drive characteristic adjustment work in the drive mechanism 100 using the drive characteristic adjustment mechanism of the drive mechanism 100 according to the first embodiment of the present invention is performed by attaching the rotor 101 to the ground plate 103 and placing the yoke 102 on the ground plate 103. This is performed in a state where the drive mechanism 100 is attached to the main plate 103.

  In the adjustment work, the ground plate 103 with the drive mechanism 100 attached is set in a predetermined measuring device used for adjusting the drive characteristics of the drive mechanism 100. Since the predetermined measuring device used for adjusting the driving characteristics of the driving mechanism 100 is a known technique, the description thereof is omitted.

  Next, in a state where the ground plate 103 with the drive mechanism 100 attached is set in a predetermined measuring device, a current such as a screwdriver is applied from the side of the ground plate 103 while supplying current to the coil 110 and operating the drive mechanism 100. And screw 114 is rotated. When the screw 114 rotates with respect to the screw hole 116 in a direction in which the screw 114 is tightened, the yoke 102 is pushed by the tip end portion of the screw 114 and rotates in the direction of arrow A in FIG.

  The operating characteristics of the shutter blades (light-shielding blades) vary as the yoke 102 rotates about the support protrusion 105. That is, in the drive mechanism 100 of the first embodiment, the operating characteristics of the shutter blade (light-shielding blade) can be adjusted by rotating the yoke 102 in the direction of arrow A in FIG. it can.

  When the screw 114 is rotated in the direction in which the screw 114 is tightened with respect to the screw hole 116, the end of the yoke 102 on the outer peripheral side of the base plate 103 is pushed by the tip of the screw 114, and the other leg of the yoke 102 is the wall. It rotates around the support protrusion 105 in a state along the portion 111. An operator who performs the adjustment work rotates the screw 114 in a direction in which the screw 114 is tightened with respect to the screw hole 116 while checking a measurement result in a predetermined measuring device.

  Then, the operator who performs the adjustment work stops the rotation of the screw 114 when the drive characteristics of the drive mechanism 100 are in an appropriate state according to the measurement result. Thereby, the position of the yoke 102 with respect to the ground plane 103, that is, the position of the drive mechanism 100 with respect to the ground plane 103 can be fixed in a state where the drive characteristics of the drive mechanism 100 are appropriate.

  On the other hand, when the operator who performs the adjustment operation rotates the screw 114 in the tightening direction with respect to the screw hole 116 until the drive characteristic of the drive mechanism 100 passes an appropriate state during the adjustment operation. Rotates the screw 114 in the opposite direction, that is, in a direction loose with respect to the screw hole 116. With respect to the yoke 102, the position on the outer peripheral side of the base plate 103 at the base portion of the yoke 102 is brought into contact with the tip of the screw 114 with the support projection 105 as the center by the restoring force of the projection 112 and the wall 111. Since the urging force in the direction acts, when the screw 114 is rotated in the direction of loosening the screw hole 116, the yoke 102 rotates in the arrow B direction around the support protrusion 105.

  An operator who performs the adjustment work rotates the screw 114 in a direction in which the screw 114 is loosened with respect to the screw hole 116 while checking a measurement result in a predetermined measuring device. Then, the operator who performs the adjustment work stops the rotation of the screw 114 when the drive characteristics of the drive mechanism 100 are in an appropriate state according to the measurement result.

  As a result, even when the screw 114 is rotated until the drive characteristic of the drive mechanism 100 passes an appropriate state, the position of the yoke 102 relative to the ground plane 103, that is, the ground plane 103, with the drive characteristic of the drive mechanism 100 being appropriate. The position of the drive mechanism 100 with respect to can be fixed.

  Further, in the adjustment operation, when the screw 114 rotated in the loosening direction with respect to the screw hole 116 is rotated until the drive characteristic of the drive mechanism 100 passes an appropriate state, the operator again The screw 114 is rotated in the direction in which the screw 114 is tightened with respect to the hole 116. As described above, according to the drive characteristic adjustment mechanism of the drive mechanism 100 of the first embodiment, the screw hole is adjusted until the drive characteristic of the drive mechanism 100 is in an appropriate state while confirming the measurement result in the predetermined measurement device. The screw 114 can be adjusted by changing the direction of rotation as many times as possible in the direction of tightening with respect to 116 or the direction of loosening with respect to the screw hole 116.

  As described above, in the drive mechanism 100 of the first embodiment, by adjusting the screwing amount of the screw 114 to the support portion 115, the yoke 102 is moved in both directions (arrow A direction and B direction) with the support protrusion 105 as the center. Rotate to As a result, in the drive mechanism 100 of the first embodiment, the position of the yoke 102 with respect to the base plate 103 is adjusted by adjusting the screwing amount of the screw 114 with respect to the support portion 115 and rotating the yoke 102 about the support protrusion 105. Can be adjusted. Then, by adjusting the position of the yoke 102 with respect to the base plate 103, the operating characteristics of the shutter blade (light shielding blade) can be adjusted.

  As described above, the drive characteristic adjustment mechanism of the drive mechanism 100 according to the first embodiment includes the rotor 101 provided between the two legs 107 and 108 of the yoke 102 having a substantially U shape, As the rotor 101 rotates, the drive pins 106 provided on the rotor 101 are reciprocated to open and close the light-shielding blades (diaphragm blades, shutter blades, etc.) connected to the drive pins 106. A drive characteristic adjusting mechanism of the drive mechanism 100, wherein a yoke 102 is rotatably provided around the rotation center of the rotor 101, and the yoke 102 is placed in a predetermined direction with respect to the yoke 102 (the direction of arrow B in FIG. 3). When the projection 112 serving as a biasing means for applying a biasing force to rotate the lens and the yoke 102 is biased in the direction opposite to the predetermined direction (the direction of arrow A in FIG. 3). To, it is characterized by comprising a screw 114 and the screw hole 116 of the yoke position adjusting means for rotating the yoke 102 against the biasing force of the projections 112.

  According to the drive characteristic adjusting mechanism of the drive mechanism 100 of the first embodiment, it is possible to measure the operating characteristics of the light shielding blade (aperture blade, shutter blade, etc.) while the position of the yoke 102 is stable. Accurate measurement results can be obtained. Then, by adjusting the operating characteristics of the light shielding blades (aperture blades, shutter blades, etc.) based on the accurate measurement results, the operating characteristics of the light shielding blades (aperture blades, shutter blades, etc.) can be adjusted with high accuracy. .

  Further, according to the drive characteristic adjustment mechanism of the drive mechanism 100 of the first embodiment, the screw 114 can be rotated by inserting a screwdriver or the like from the side of the base plate 103 with the yoke 102 attached to the base plate 103. Therefore, it is possible to easily adjust the operation characteristics of the light-shielding blade (aperture blade, shutter blade, etc.).

  As described above, according to the drive characteristic adjusting mechanism of the drive mechanism 100 of the first embodiment, the position of the yoke 102 can be adjusted while the yoke 102 is attached to the ground plate 103. Since the operating characteristics of the light-shielding blades (aperture blades, shutter blades, etc.) can be accurately measured in a stable position, adjustment of the operating characteristics of the light-shielding blades (aperture blades, shutter blades, etc.) is easy and accurate. Can do well.

  Further, in the drive characteristic adjusting mechanism of the drive mechanism 100 according to the first embodiment, the protrusion 112 is provided integrally with the ground plate 103 that supports the yoke 102, and an urging force is applied by the elastic force of the protrusion 112 itself. It is said.

  According to the drive characteristic adjusting mechanism of the drive mechanism 100 of the first embodiment, it is possible to realize a state in which the position of the yoke 102 is stable while suppressing an increase in the number of parts and an increase in assembly man-hours. With a simple configuration, it is possible to easily and accurately adjust the operation characteristics of the light shielding blades (aperture blades, shutter blades, etc.).

  Further, the drive characteristic adjusting mechanism of the drive mechanism 100 according to the first embodiment is characterized in that the yoke position adjusting means is realized by the screw 114 and the screw hole 116. According to the drive characteristic adjusting mechanism of the drive mechanism 100 of this embodiment, the operation characteristics of the light shielding blades (aperture blades, shutter blades, etc.) can be easily and accurately adjusted with a simple configuration.

(Embodiment 2)
Next, a drive characteristic adjusting mechanism of the drive mechanism 100 according to the second embodiment of the present invention will be described. The drive characteristic adjustment mechanism of the drive mechanism 100 according to the second embodiment of the present invention is a drive characteristic of the light shielding blade in the drive mechanism 100 that drives the light shielding blade, such as a shutter mechanism and a diaphragm mechanism mounted on the imaging device or the lens device. Adjust. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  FIG. 4 is an explanatory diagram showing a drive characteristic adjusting mechanism of the drive mechanism 100 according to the second embodiment of the present invention. In FIG. 4, the drive characteristic adjusting mechanism of the drive mechanism 100 according to the second embodiment of the present invention includes a second screw 401. The second screw 401 is screwed into a second screw hole 403 provided in the second support portion 402. In this embodiment, the yoke position adjusting means can be realized by the second screw 401 and the second screw hole 403.

  The second support portion 402 is provided integrally with the main plate 103. The second support portion 402 is provided continuously to the wall portion 111. The tip of the second screw 401 is in contact with the tip of one leg 107 (the leg on the side where the coil 110 is provided) of the yoke 102.

  A first urging member 404 is provided in place of the protrusion 112 in the first embodiment at a position on the edge portion of the opening 104 to be shielded in the base plate 103 in the base portion of the yoke 102. . In the second embodiment, an urging means can be realized by the first urging member 404.

  The first urging member 404 abuts on the yoke 102 from the opening 104 side to be shielded in the ground plate 103, and urges the yoke 102 from the edge side of the opening 104 to be shielded toward the outer peripheral side of the ground plate 103. is doing. That is, the first biasing member 404 applies a biasing force in the direction of arrow C to the yoke 102.

  Further, a second urging member 405 is provided at a position on the outer peripheral side of the base plate 103 in the base portion of the yoke 102 instead of the screw 114, the support portion 115, and the screw hole 116 in the first embodiment. Is provided. In this embodiment, the urging means can be realized by the second urging member 405.

  The second urging member 405 urges the yoke 102 from the outer peripheral side of the base plate 103 toward the support protrusion 105 side. That is, the second biasing member 405 applies a biasing force in the direction of arrow D to the yoke 102.

  The yoke 102 is urged by the first urging member 404 and the second urging member 405 in a direction in which the tip of one leg 107 of the yoke 102 comes into contact with the tip of the second screw 401. Yes. As a result, the yoke 102 is urged in the arrow B direction around the support protrusion 105.

(Driving characteristics adjustment work)
Next, a drive characteristic adjustment operation in the drive mechanism 100 using the drive characteristic adjustment mechanism of the drive mechanism 100 according to the second embodiment of the present invention will be described. In the drive characteristic adjustment work in the drive mechanism 100 using the drive characteristic adjustment mechanism of the drive mechanism 100 according to the second embodiment of the present invention, the ground plate 103 with the drive mechanism 100 attached is set in a predetermined measuring device. In this state, while supplying a current to the coil 110 and operating the drive mechanism 100, a tool such as a screwdriver is inserted from the side of the base plate 103, and the second screw 401 is rotated.

  When the second screw 401 rotates in the direction in which the second screw 401 is tightened with respect to the second screw hole 403, the tip of one leg 107 of the yoke 102 is pushed by the tip of the second screw 401, and the support protrusion 105 is centered. As shown in FIG. The operating characteristics of the shutter blades (light-shielding blades) vary as the yoke 102 rotates about the support protrusion 105. Therefore, in the drive mechanism 100 of the second embodiment, the support protrusion 105 is the center in the direction of arrow A. By rotating the yoke 102, the operating characteristics of the shutter blade (light-shielding blade) can be adjusted.

  An operator who performs the adjustment work rotates the second screw 401 in a direction in which the second screw 401 is tightened with respect to the second screw hole 403 while checking a measurement result in a predetermined measuring device. Then, the operator who performs the adjustment work stops the rotation of the screw 114 when the drive characteristics of the drive mechanism 100 are in an appropriate state according to the measurement result. Thereby, the position of the yoke 102 with respect to the ground plane 103, that is, the position of the drive mechanism 100 with respect to the ground plane 103 can be fixed in a state where the drive characteristics of the drive mechanism 100 are appropriate.

  On the other hand, during the adjustment work, the operator who performs the adjustment work has rotated the second screw 401 in the tightening direction with respect to the second screw hole 403 until the drive characteristics of the drive mechanism 100 have passed an appropriate state. In this case, the worker rotates the second screw 401 in the opposite direction, that is, in a direction loosening with respect to the second screw hole 403.

  A biasing force is applied to the yoke 102 by the first biasing member 404 and the second biasing member 405 to rotate the yoke 102 in the direction of arrow B in FIG. Therefore, when the second screw 401 is rotated relative to the second screw hole 403 in the direction of loosening, the yoke 102 rotates in the arrow B direction around the support protrusion 105.

  An operator who performs the adjustment work rotates the second screw 401 in the direction in which the second screw 401 is loosened with respect to the second screw hole 403 while confirming the measurement result in a predetermined measuring device. Then, the operator who performs the adjustment work stops the rotation of the second screw 401 when the drive characteristics of the drive mechanism 100 are in an appropriate state according to the measurement result.

  As a result, even when the second screw 401 is rotated until the drive characteristic of the drive mechanism 100 passes an appropriate state, the position of the yoke 102 with respect to the base plate 103 is maintained with the drive characteristic of the drive mechanism 100 being appropriate. That is, the position of the drive mechanism 100 with respect to the ground plane 103 can be fixed.

  Further, when the second screw 401 rotated in the loosening direction with respect to the second screw hole 403 is rotated during the adjustment operation until the drive characteristics of the drive mechanism 100 pass an appropriate state, The person again rotates the second screw 401 in the direction in which the second screw 401 is tightened with respect to the second screw hole 403.

  As described above, according to the drive characteristic adjustment mechanism of the drive mechanism 100 of the second embodiment, the second measurement is performed until the drive characteristic of the drive mechanism 100 is in an appropriate state while confirming the measurement result in the predetermined measurement device. The second screw 401 can be adjusted by changing the rotation direction any number of times in the direction of tightening with respect to the screw hole 403 or the direction of loosening with respect to the second screw hole 403.

  As described above, in the drive mechanism 100 according to the second embodiment, by adjusting the screwing amount of the second screw 401 with respect to the second screw hole 403, the yoke 102 is moved in both directions (arrows) around the support protrusion 105. A direction and B direction).

  As a result, in the drive mechanism 100 according to the second embodiment, the amount of screwing of the second screw 401 with respect to the second screw hole 403 is adjusted, and the yoke 102 is rotated about the support protrusion 105, whereby the main plate The position of the yoke 102 with respect to 103 can be adjusted. Then, by adjusting the position of the yoke 102 with respect to the base plate 103, the operating characteristics of the shutter blade (light shielding blade) can be adjusted.

  As described above, the drive characteristic adjustment mechanism of the drive mechanism 100 according to the second embodiment includes the rotor 101 provided between the two legs 107 and 108 of the yoke 102 having a substantially U shape, As the rotor 101 rotates, the drive pins 106 provided on the rotor 101 are reciprocated to open and close the light-shielding blades (diaphragm blades, shutter blades, etc.) connected to the drive pins 106. A drive characteristic adjusting mechanism of the drive mechanism 100, wherein a yoke 102 is provided so as to be rotatable about the rotation center of the rotor 101, and the yoke 102 is placed in a predetermined direction with respect to the yoke 102 (the direction of arrow B in FIG. 4) The first urging member 404 and the second urging member 405 as the urging means for applying the urging force for rotating the yoke 102 and the yoke 102 in a direction opposite to the predetermined direction (see FIG. And a second screw 401 as yoke position adjusting means for rotating the yoke 102 against the urging forces of the first urging member 404 and the second urging member 405. The second screw hole 403 is provided.

  According to the drive characteristic adjusting mechanism of the drive mechanism 100 of the second embodiment, it is possible to measure the operating characteristics of the light shielding blade (aperture blade, shutter blade, etc.) while the position of the yoke 102 is stable. Accurate measurement results can be obtained. Then, by adjusting the operating characteristics of the light shielding blades (aperture blades, shutter blades, etc.) based on the accurate measurement results, the operating characteristics of the light shielding blades (aperture blades, shutter blades, etc.) can be adjusted with high accuracy. .

  Further, according to the drive characteristic adjusting mechanism of the drive mechanism 100 of the second embodiment, with the yoke 102 attached to the base plate 103, a screwdriver is inserted from the side of the base plate 103 to rotate the second screw 401. Therefore, it is possible to easily adjust the operating characteristics of the light-shielding blade (aperture blade, shutter blade, etc.).

  Thus, according to the drive characteristic adjustment mechanism of the drive mechanism 100 of the second embodiment, the position of the yoke 102 can be adjusted while the yoke 102 is attached to the ground plate 103, and the yoke 102 Since the operating characteristics of the light-shielding blades (aperture blades, shutter blades, etc.) can be accurately measured in a stable position, adjustment of the operating characteristics of the light-shielding blades (aperture blades, shutter blades, etc.) is easy and accurate. Can do well.

  The drive characteristic adjustment mechanism of the drive mechanism 100 according to the second embodiment is characterized in that a yoke position adjusting means is realized by the second screw 401 and the second screw hole 403. According to the drive characteristic adjusting mechanism of the drive mechanism 100 of this embodiment, the operation characteristics of the light shielding blades (aperture blades, shutter blades, etc.) can be easily and accurately adjusted with a simple configuration.

(Embodiment 3)
Next, a drive characteristic adjusting mechanism of the drive mechanism 100 according to the third embodiment of the present invention will be described. The drive characteristic adjustment mechanism of the drive mechanism 100 according to the third embodiment of the present invention is a drive characteristic of the light shielding blade in the drive mechanism 100 that drives the light shielding blade, such as a shutter mechanism and a diaphragm mechanism mounted on the imaging device or the lens device. Adjust. In the second embodiment, the same parts as those in the first and second embodiments described above are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 5 is an explanatory view showing a drive characteristic adjusting mechanism of the drive mechanism 100 according to the third embodiment of the present invention. In FIG. 5, the drive characteristic adjusting mechanism of the drive mechanism 100 according to the third embodiment of the present invention includes a coil spring 501 instead of the second screw 401 and the second screw hole 403 in the second embodiment. ing.

  One end of the coil spring 501 is engaged with the protrusion 502 provided on the base plate 103, and the other end is engaged with the tip of one leg 107 (the leg on the side where the coil 110 is provided) of the yoke 102. Yes. The coil spring 501 is a compression spring (tensile spring), and exerts an urging force in a direction in which the yoke 102 is rotated in the direction of arrow B about the support protrusion 105. In this embodiment, the biasing means can be realized by the coil spring 501.

  Further, the drive characteristic adjusting mechanism includes a screw 114 and a screw hole 116 provided in the support portion 115 in place of the first urging member 404 and the second urging member 405 in the second embodiment. Yes. That is, the drive characteristic adjusting mechanism of the drive mechanism 100 according to the third embodiment of the present invention is the same as the screw 114 and the support portion 115 provided in the screw hole 116 provided in the screw 114 and the support portion 115 in the first embodiment. Is provided with a screw hole 116 provided in the.

(Driving characteristics adjustment work)
Next, a drive characteristic adjustment operation in the drive mechanism 100 using the drive characteristic adjustment mechanism of the drive mechanism 100 according to the third embodiment of the present invention will be described. In the drive characteristic adjustment work in the drive mechanism 100 using the drive characteristic adjustment mechanism of the drive mechanism 100 according to the third embodiment of the present invention, the ground plate 103 with the drive mechanism 100 attached is set in a predetermined measuring device. In this state, while supplying current to the coil 110 and operating the drive mechanism 100, a tool such as a screwdriver is inserted from the side of the base plate 103, and the screw 114 is rotated.

  When the screw 114 is rotated in the direction in which the screw 114 is tightened with respect to the screw hole 116, the yoke 102 is pushed by the tip portion of the screw 114 and rotates in the direction of arrow A in FIG. The operating characteristics of the shutter blades (light-shielding blades) vary as the yoke 102 rotates about the support protrusion 105. Therefore, in the drive mechanism 100 of the third embodiment, the support protrusion 105 is centered in the direction of arrow A. By rotating the yoke 102, the operating characteristics of the shutter blade (light-shielding blade) can be adjusted.

  When the screw 114 is rotated in the direction in which the screw 114 is tightened with respect to the screw hole 116, the end of the yoke 102 on the outer peripheral side of the base plate 103 is pushed by the tip of the screw 114, and the other leg 108 of the yoke 102 is moved. In a state along the wall 111, the support protrusion 105 is rotated as a center. An operator who performs the adjustment work rotates the screw 114 in a direction in which the screw 114 is tightened with respect to the screw hole 116 while checking a measurement result in a predetermined measuring device.

  Then, the operator who performs the adjustment work stops the rotation of the screw 114 when the drive characteristics of the drive mechanism 100 are in an appropriate state according to the measurement result. Thereby, the position of the yoke 102 with respect to the ground plane 103, that is, the position of the drive mechanism 100 with respect to the ground plane 103 can be fixed in a state where the drive characteristics of the drive mechanism 100 are appropriate.

  On the other hand, when the operator who performs the adjustment operation rotates the screw 114 in the tightening direction with respect to the screw hole 116 until the drive characteristic of the drive mechanism 100 passes an appropriate state during the adjustment operation. Rotates the screw 114 in the opposite direction, that is, in a direction loose with respect to the screw hole 116. A biasing force that rotates the yoke 102 in the direction of arrow B about the support protrusion 105 is applied to the yoke 102 by the coil spring 501, so that the screw 114 is rotated in the direction of loosening the screw hole 116. In this case, the yoke 102 rotates in the arrow B direction around the support protrusion 105.

  An operator who performs the adjustment work rotates the screw 114 in a direction in which the screw 114 is loosened with respect to the screw hole 116 while checking a measurement result in a predetermined measuring device. Then, the operator who performs the adjustment work stops the rotation of the screw 114 when the drive characteristics of the drive mechanism 100 are in an appropriate state according to the measurement result. As a result, even when the screw 114 is rotated until the drive characteristic of the drive mechanism 100 passes an appropriate state, the position of the yoke 102 relative to the ground plane 103, that is, the ground plane 103, with the drive characteristic of the drive mechanism 100 being appropriate. The position of the drive mechanism 100 with respect to can be fixed.

  Further, in the adjustment operation, when the screw 114 rotated in the loosening direction with respect to the screw hole 116 is rotated until the drive characteristics of the drive mechanism 100 pass an appropriate state, the operator again The screw 114 is rotated in the direction in which the screw 114 is tightened with respect to the hole 116.

  As described above, according to the drive characteristic adjustment mechanism of the drive mechanism 100 of the third embodiment, the screw hole is adjusted until the drive characteristic of the drive mechanism 100 is in an appropriate state while confirming the measurement result in the predetermined measurement device. The screw 114 can be adjusted by rotating it while changing the rotation direction of the screw 114 in the direction of tightening with respect to 116 or the direction of loosening with respect to the screw hole 116.

  As described above, in the drive mechanism 100 according to the third embodiment, by adjusting the screwing amount of the screw 114 with respect to the screw hole 116, the yoke 102 is moved in both directions (arrow A direction and B direction) with the support protrusion 105 as the center. Can be rotated.

  As a result, in the drive mechanism 100 according to the third embodiment, the position of the yoke 102 with respect to the base plate 103 is adjusted by adjusting the screwing amount of the screw 114 with respect to the screw hole 116 and rotating the yoke 102 about the support protrusion 105. Can be adjusted. Then, by adjusting the position of the yoke 102 with respect to the base plate 103, the operating characteristics of the shutter blade (light shielding blade) can be adjusted.

  As described above, the drive characteristic adjusting mechanism of the drive mechanism 100 according to the third embodiment includes the rotor 101 provided between the two legs 107 and 108 of the yoke 102 having a substantially U shape. As the rotor 101 rotates, the drive pins 106 provided on the rotor 101 are reciprocated to open and close the light-shielding blades (diaphragm blades, shutter blades, etc.) connected to the drive pins 106. A drive characteristic adjusting mechanism of the drive mechanism 100, wherein a yoke 102 is rotatably provided around the rotation center of the rotor 101, and the yoke 102 is placed in a predetermined direction with respect to the yoke 102 (in the direction of arrow B in FIG. 5). The coil spring 501 serving as a biasing means for applying a biasing force to rotate the coil spring 501 and the yoke 102 are biased in the direction opposite to the predetermined direction (the direction of arrow A in FIG. 5). Together, it is characterized by comprising a screw 114 and the screw hole 116 of the yoke position adjusting means for rotating the yoke 102 against the biasing force of the coil spring 501, the.

  According to the drive characteristic adjusting mechanism of the drive mechanism 100 of the third embodiment, it is possible to measure the operating characteristics of the light shielding blades (aperture blades, shutter blades, etc.) while the position of the yoke 102 is stable. Accurate measurement results can be obtained. Then, by adjusting the operating characteristics of the light shielding blades (aperture blades, shutter blades, etc.) based on the accurate measurement results, the operating characteristics of the light shielding blades (aperture blades, shutter blades, etc.) can be adjusted with high accuracy. .

  Further, according to the drive characteristic adjusting mechanism of the drive mechanism 100 of the third embodiment, the screw 114 can be rotated by inserting a screwdriver or the like from the side of the base plate 103 with the yoke 102 attached to the base plate 103. Therefore, it is possible to easily adjust the operation characteristics of the light-shielding blade (aperture blade, shutter blade, etc.).

  Thus, according to the drive characteristic adjusting mechanism of the drive mechanism 100 of the third embodiment, the position of the yoke 102 can be adjusted while the yoke 102 is attached to the ground plate 103, and the yoke 102 Since the operating characteristics of the light-shielding blades (aperture blades, shutter blades, etc.) can be accurately measured in a stable position, adjustment of the operating characteristics of the light-shielding blades (aperture blades, shutter blades, etc.) is easy and accurate. Can do well.

  Further, in the drive characteristic adjusting mechanism of the drive mechanism 100 according to the third embodiment, one end is locked to the base plate 103 that supports the yoke 102, and the other end is provided on one leg 107 of the yoke 102. The biasing means is realized by a coil spring 501 which is an elastic member provided so as to be elastically deformable between the ends.

  According to the drive characteristic adjusting mechanism of the drive mechanism 100 of the third embodiment, the operation characteristics of the light shielding blades (aperture blades, shutter blades, etc.) can be easily and accurately adjusted with a simple configuration.

(Embodiment 4)
Next, a drive characteristic adjusting mechanism of the drive mechanism 100 according to the fourth embodiment of the present invention will be described. The drive characteristic adjustment mechanism of the drive mechanism 100 according to the fourth embodiment of the present invention is a drive characteristic of the light shielding blade in the drive mechanism 100 that drives the light shielding blade, such as a shutter mechanism and a diaphragm mechanism mounted on the imaging device or the lens device. Adjust. In the fourth embodiment, the same parts as those in the first, second and third embodiments are denoted by the same reference numerals, and the description thereof is omitted.

  FIG. 6 is an explanatory diagram showing a drive characteristic adjusting mechanism of the drive mechanism 100 according to the fourth embodiment of the present invention. In FIG. 6, the drive characteristic adjustment mechanism of the drive mechanism 100 according to the fourth embodiment of the present invention is different in the shape of the wall portion 111 in the base plate 103 as compared with the first embodiment. The wall portion 601 of the base plate 103 of the drive characteristic adjusting mechanism of the drive mechanism 100 according to the fourth embodiment of the present invention protrudes toward the rotor 101 rather than the arc concentric with the arc formed by the rotor 101.

  Due to the shape of the wall portion 601, when the yoke 102 rotates with respect to the base plate 103 around the support protrusion 105, the two legs 107 and 108 in the yoke 102 are accompanied with the rotation and according to the rotation direction. Any one of these is deformed so as to approach the rotor 101.

  When the yoke 102 rotates in the direction of arrow A around the support protrusion 105, the tip of the other leg portion (the leg portion on which the coil 110 is not provided) of the yoke 102 approaches the rotor 101. Deform to When the yoke 102 rotates around the support protrusion 105 in the arrow B direction, the tip of one leg 107 (the leg 108 on which the coil 110 is provided) of the yoke 102 is the rotor 101. Deforms to approach.

  As described above, in the drive characteristic adjusting mechanism of the drive mechanism 100 according to the fourth embodiment, the gap 109 formed between the rotor 101 and the yoke 102 can be adjusted by rotating the yoke 102. As a result, the size of the gap 109 can be adjusted so as to obtain an optimum magnetic force. By adjusting the magnetic force by adjusting the size of the gap 109 together with the position of the yoke 102 with respect to the base plate 103, the operating characteristics of the shutter blade (light-shielding blade) can be adjusted more accurately.

(Embodiment 5)
Next, a drive characteristic adjusting mechanism of the drive mechanism 100 according to the fifth embodiment of the present invention will be described. The drive characteristic adjusting mechanism of the drive mechanism 100 according to the fifth embodiment of the present invention is a drive characteristic of the light shielding blade in the drive mechanism 100 that drives the light shielding blade, such as a shutter mechanism and a diaphragm mechanism mounted on the imaging device or the lens device. Adjust. In the fifth embodiment, the same parts as those in the first, second, third, and fourth embodiments described above are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 7 is an explanatory diagram showing a drive characteristic adjusting mechanism of the drive mechanism 100 according to the fifth embodiment of the present invention. In FIG. 7, the drive characteristic adjusting mechanism of the drive mechanism 100 according to the fifth embodiment of the present invention is different from the yoke 102 in the first, second, third, and fourth embodiments described above, and is a yoke 701 having a substantially D shape. It has. The protrusion 112 provided on the ground plate 103 biases the yoke 701 against a biasing force applied to the yoke 701 by a screw 702 screwed to the ground plate 103.

  When the ground plate 103 with the drive mechanism 100 attached is set in a predetermined measuring device, when a current is supplied to the coil 110 and screwed in the direction in which the screw 702 is tightened (see arrow 703), the screw 702 is The tip of the screw 702 moves in the direction in which it contacts the yoke 701 (see arrow 704). And it rotates to the arrow A direction with respect to the base plate 103 centering | focusing on the support protrusion 105. FIG.

  When the ground plate 103 with the drive mechanism 100 attached is set in a predetermined measuring device and a current is supplied to the coil 110 and the screw 702 is rotated in the loosening direction, the screw 702 has a tip at the end of the screw 702. Move away from 701. Then, it rotates in the direction of arrow B with respect to the main plate 103 around the support protrusion 105.

  The operator who performs the adjustment work stops the rotation of the screw 702 when the drive characteristics of the drive mechanism 100 are in an appropriate state according to the measurement result. Thereby, the position of the yoke 102 with respect to the ground plane 103, that is, the position of the drive mechanism 100 with respect to the ground plane 103 can be fixed in a state where the drive characteristics of the drive mechanism 100 are appropriate.

(Embodiment 6)
Next, a drive characteristic adjusting mechanism of the drive mechanism 100 according to the sixth embodiment of the present invention will be described. The drive characteristic adjustment mechanism of the drive mechanism 100 according to the sixth embodiment of the present invention is a drive characteristic of the light shielding blade in the drive mechanism 100 that drives the light shielding blade, such as a shutter mechanism and a diaphragm mechanism mounted on the imaging device or the lens device. Adjust. In the sixth embodiment, the same parts as those in the first, second, third, fourth, and fifth embodiments described above are denoted by the same reference numerals, and description thereof is omitted.

  FIG. 8 is an explanatory diagram showing a drive characteristic adjusting mechanism of the drive mechanism 100 according to the sixth embodiment of the present invention. In FIG. 8, the drive characteristic adjusting mechanism of the drive mechanism 100 according to the sixth embodiment of the present invention has a substantially linear shape, unlike the yokes 102 and 701 in the first, second, third, fourth, and fifth embodiments described above. A yoke 801 is provided. The protrusion 112 provided on the base plate 103 biases the yoke 801 against a biasing force applied to the yoke 801 by a screw 802 screwed to the ground plate 103.

  When the ground plate 103 with the drive mechanism 100 attached is set in a predetermined measuring device, when a current is supplied to the coil 110 and screwed in the direction in which the screw 802 is tightened (see arrow 803), the screw 802 is The tip of the screw 802 moves in a direction in which it contacts the yoke 801 (see arrow 804). And it rotates to the arrow A direction with respect to the base plate 103 centering | focusing on the support protrusion 105. FIG.

  When the ground plate 103 with the drive mechanism 100 attached is set in a predetermined measuring device and a current is supplied to the coil 110 and the screw 802 is rotated in the loosening direction, the screw 802 has the tip of the screw 802 at the yoke. Move away from 801. Then, it rotates in the direction of arrow B with respect to the main plate 103 around the support protrusion 105.

  The operator who performs the adjustment work stops the rotation of the screw 802 when the drive characteristics of the drive mechanism 100 are in an appropriate state according to the measurement result. Thereby, the position of the yoke 102 with respect to the ground plane 103, that is, the position of the drive mechanism 100 with respect to the ground plane 103 can be fixed in a state where the drive characteristics of the drive mechanism 100 are appropriate.

  As described above, the drive characteristic adjustment mechanism of the drive mechanism according to the present invention is useful for the drive characteristic adjustment mechanism of the drive mechanism that performs the opening / closing operation of the light shielding blade. It is suitable for a drive characteristic adjustment mechanism for a drive mechanism that performs opening and closing operations.

DESCRIPTION OF SYMBOLS 100 Drive mechanism 101 Rotor 102 Yoke 103 Ground plate 105 Support protrusion 106 Drive pin 107, 108 Leg part 109 Gap 110 Coil 111 Wall part 112 Projection 114 Screw 116 Screw hole 401 2nd screw 403 2nd screw hole 404 1st screw hole Energizing member 405 Second energizing member 501 Coil spring 701 Yoke 702 Screw 801 Yoke 802 Screw

Claims (4)

A rotor made of permanent magnets,
A yoke having legs disposed so as to face the peripheral surface of the rotor,
A drive characteristic adjustment mechanism of a drive mechanism that performs a reciprocating motion of the optical member along with the rotation of the rotor,
The yoke is rotatably provided around the rotation center of the rotor,
A biasing means for applying a biasing force to rotate the yoke in a predetermined direction with respect to the yoke;
Yoke position adjusting means for urging the yoke in a direction opposite to the predetermined direction and rotating the yoke against the urging force of the urging means;
A drive characteristic adjustment mechanism for a drive mechanism, comprising:   The drive characteristic adjusting mechanism of the drive mechanism according to claim 1, wherein the biasing means is provided integrally with a ground plate that supports the yoke, and causes the biasing force to act by its own elastic force.   The urging means has one end integrally provided on the ground plate supporting the yoke, the other end provided on one leg of the yoke, and provided elastically deformable between the one end and the other end. The drive characteristic adjustment mechanism of the drive mechanism according to claim 1, wherein the drive characteristic adjustment mechanism is an elastic member.   The yoke position adjusting means includes a screw having a tip abutting on the yoke and a screw hole holding the screwed screw, and adjusting the screwing amount of the screw with respect to the screw hole. The drive characteristic adjusting mechanism of the drive mechanism according to any one of claims 1 to 3, wherein the yoke is rotated against an urging force of the drive mechanism.

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