JP2009222744A - Lens barrel and optical device including it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens barrel, easily adjusting a zoom lens of an optical axis of a correction lens group (an optical element) for vibration-proof correction, and holding down consumption of power consumption even when a magnetism balancing position changes due to a manufacturing error in a driving magnet and a yoke so that the optical axis of the correction lens group for vibration proof correction is misaligned with the optical axis of another lens group. <P>SOLUTION: This lens barrel includes an image deflection correcting device for shifting a shift frame 3 holding an optical element to a shift base within an optical axis orthogonal plane to correct image deflection, wherein a driving magnet 5p is held on one of the shift frame 3 and the shift base 7, a coil is held on the other thereof, a yoke 6p is held on a shift base, a coil is energized to shift the shift frame, and an adjusting mechanism is provided to adjust the position of at least one of the driving magnet and the yoke within an optical axis orthogonal plane. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lens barrel used in an optical apparatus such as a digital camera or a digital video camera, and in particular, an image shake correction apparatus that shifts a lens (optical element) in a plane orthogonal to an optical axis in order to correct image shake due to camera shake. The present invention relates to a lens barrel having

  In an optical apparatus such as a digital camera, optical image stabilization (image blur correction) is performed by correcting an optical axis shift (image blur) caused by camera shake during shooting. As one type of optical image stabilization, a method is known in which a shake correction lens group (optical element) is shifted in a plane orthogonal to the optical axis (Patent Document 1).

  The drive mechanism for moving the shake correction lens group disclosed in Patent Document 1 uses a so-called moving coil type shift unit (shake correction device).

  That is, in Patent Document 1, a driving magnet is disposed on a fixed base member (shift base), and a yoke and a coil are disposed on a movable shift member (shift frame). Further, three balls are arranged between the base member and the shift member, and the shift member is urged against the base member by a magnetic attraction force acting between the drive magnet and the yoke, thereby holding the ball.

  Then, the image blur correction is performed by shifting the shift member in the plane orthogonal to the optical axis while rolling the ball by the Lorentz force generated by repulsion between the drive magnet and the magnetic force lines generated in the coil by energizing the coil.

Here, since the drive magnet is magnetized in two directions in the radial direction with respect to the optical axis, the shift member is driven so that the force from both poles received by the yoke is equal when the coil is not energized. The relative position to the magnet is changed. At this time, since the shift member is restricted from moving in the optical axis direction by the three balls, it moves only within the plane orthogonal to the optical axis.
JP 2002-196382 A

  In recent years, optical devices such as digital cameras and digital video cameras are required to be reduced in size and weight as a whole in order to improve portability.

  Similarly, a lens barrel having an image blur correction device used in these optical devices is also required to be reduced in size and weight.

  In order to reduce the size and weight of a lens barrel having an image blur correction device, it is important to reduce the size and weight of the driving means used in the image blur correction device.

  In addition, the driving means is required to be small and consume less power.

  In the conventional shift unit, the yoke held by the shift frame on the movable side receives force from both poles of the drive magnet that is polarized in two radial directions with respect to the optical axis. At this time, a force acts on the yoke so that the yoke moves to a magnetically balanced position where the force received from the driving magnet is equal.

  However, the magnetic balance position changes depending on manufacturing errors such as the center position of magnetization of the driving magnet, the dimensional deviation of each component constituting the shift unit, and the positional deviation when these parts are assembled.

  Therefore, in the drive of the shift unit at the time of camera shooting, in addition to the drive for correcting the image shake due to the camera shake, the drive for correcting the position of the correction lens group caused by the shift of the magnetic balance position of the shift unit is performed. It is necessary separately.

  Therefore, it is necessary to always energize the coil for driving that is required separately. As a result, power consumption increases and a large capacity driving means is required.

  For this reason, the power of the lens barrel on which the shift unit is mounted is consumed, and the driving means is also enlarged. In addition, the accuracy of the components of the shift unit must be increased so that the magnetic balance position is not displaced when the product is mass-produced, which makes manufacturing very difficult.

  In many lens barrels, there are manufacturing errors in the drive magnet and yoke, the magnetic balance position changes, and the optical axis of the correction lens group for image stabilization correction is shifted from the optical axis of other lens groups. Many.

  The present invention can easily adjust the zoom lens of the optical axis of the correction lens group (optical element) for image stabilization even if this is the case, and a lens barrel that can suppress power consumption. And an optical apparatus including the same.

The lens barrel of the present invention is a lens barrel having an image blur correction device that corrects image blur by shifting a shift frame holding an optical element in a plane orthogonal to the optical axis with respect to a shift base.
Of the shift frame and the shift base, a driving magnet is held on one side, and a coil is held on the other side.
The shift base holds a yoke, and shifts the shift frame by energizing the coil.
It has an adjustment mechanism for adjusting the position of at least one of the drive magnet or the yoke within the plane orthogonal to the optical axis.

  According to the present invention, it is possible to easily adjust the zoom lens of the optical axis of the correction lens group (optical element) for image stabilization, and to obtain a lens barrel that can suppress power consumption.

  The present invention is a lens barrel used in an optical apparatus such as a digital camera or a video camera. The lens barrel of the present invention corrects image blur by shifting a shift frame holding an optical element as a correction lens group for image blur correction in a plane orthogonal to the optical axis with respect to a shift base on the apparatus body side. An image blur correction device (shift unit) is included.

  Of the shift frame and the shift base, one side holds a driving magnet and a yoke, and the other side holds a coil and a yoke.

  Then, the image blur is corrected by shifting the shift frame by energizing the coil.

  In the lens barrel of the present invention, an adjustment mechanism is newly set on the basis of such a configuration, and the position of at least one of the drive magnet or the yoke is adjusted in the plane orthogonal to the optical axis to correct the optical axis of the correction lens group. Is adjusted.

  In general, some optical devices such as cameras use a method of correcting image blur caused by camera shake by shifting a shift frame that holds a correction lens group in a lens barrel in a plane orthogonal to the optical axis.

  In this method, the shift frame that holds the correction lens group is moved using the Lorentz force acting between the driving magnet and the coil.

  However, the magnetic balance position may be shifted due to a manufacturing error due to a shift in the magnetization center position of the drive magnet, a dimensional shift of each component such as the drive magnet / yoke, or a mounting position.

  Then, the optical axis of the correction lens group does not coincide with the optical axes of the other lens groups in the lens barrel. In this case, in addition to the image blur correction, driving for correcting the position of the correction lens group due to the deviation of the magnetic balance position is required. In this case, it is necessary to constantly apply extra current to the coil, resulting in power consumption, which hinders power saving of the lens barrel on which the shift unit is mounted.

  On the other hand, the lens barrel of the present invention is provided with an adjusting mechanism for adjusting the position of the components constituting the driving means such as the driving magnet and the yoke in the plane orthogonal to the optical axis. At the time of assembly, adjustment is made so that the optical axis of the correction lens group coincides with the optical axes of the other lenses in the lens barrel.

  Thereby, power consumption for correcting the deviation of the optical axis of the correction lens group caused by the change of the magnetic balance position is suppressed, and power saving is achieved.

  Next, each embodiment of the lens barrel of the present invention will be described.

(Example 1)
FIG. 1 is a schematic view of a shift unit (image blur correction device) that is a part of a lens barrel according to a first embodiment of the present invention. FIG. 2 is an exploded perspective view of a shift unit that is a part of the first embodiment of the present invention. The shift frame 3 holds a correction lens group 33, a pitch direction driving coil 32p and an upper yoke 31p, and a yaw direction driving coil 32y and an upper yoke 31y. The shift frame 3 is driven using a moving coil type. The sensor base 2 is fixed to the shift base (device main body) 7 with screws. The pitch direction driving magnet 5p is attracted to the back yoke 6p, and the yaw direction driving magnet 5y is attracted to the back yoke 6y.

  A magnetic circuit is formed by the driving magnet 5p (5y), the back yoke 6p (6y), and the upper yoke 31p (31y). Electric power is supplied to the coils 32p and 32y of the shift frame 3 via the flexible cable 9. A part of the flex 9 is fixed to the sensor base 2 by the presser sheet metal 1 and another part is fixed to the shift base 7 by the presser sheet metal 10.

  The pitch direction adjusting screw 8p and the yaw direction adjusting screw 8y are in contact with the driving magnet 5p and the back yoke 6p, and the driving magnet 5y and the back yoke 6y via the shift base 7, respectively. The shift frame 3 is urged toward the shift base 7 by the magnetic attraction between the driving magnet 5p (5y) and the upper yoke 31p (31y), and the ball 4 is sandwiched therebetween.

  FIG. 3 is a cross-sectional view of an actuator portion in a moving coil type shift unit, for example, as Embodiment 1 of the present invention. The magnetic path of the magnetic circuit of Example 1 will be described. The driving means for applying the driving force in the pitch direction and the yaw direction have the same configuration and only have a phase difference of 90 degrees around the optical axis. Therefore, here, the driving means (5p, 6p, 31p) in the pitch direction shown in FIG. 2 will be described. The drive magnet 5p magnetized in the radial direction with respect to the optical axis is held by a shift base 7 (not shown) while being attracted to the back yoke 6p. The upper yoke 31p and the coil 32p are held by a shift frame 3 (not shown).

  A protrusion 31ap is formed on the upper yoke 31p by half-punching. At this time, since the protruding portion 31pa is at an approximately equal distance from the two-pole magnetized magnetic poles of the driving magnet 5p, the force with which both magnetic poles pull the protruding portion 31pa is also approximately equal, and a balanced state is obtained. The magnetic flux entering and exiting from the two magnetic poles of the driving magnet 5p is closed through the yoke 31p.

  FIG. 4 is a schematic diagram of a component position adjusting method for the moving coil type shift unit according to the first embodiment of the present invention. Note that the pitch driving means and the yaw driving means in the pitch direction and the yaw direction and the position adjusting means described later have the same configuration and have a phase difference of 90 degrees around the optical axis.

  The pitch direction and yaw direction are adjusted independently of each other.

  Therefore, here, the driving means (pitch driving means) and the position adjusting means in the pitch direction shown in FIG. 2 will be described.

  4A shows the case where the magnetization center 5pa of the driving magnet 5p is at the outer shape center position, and FIG. 4B shows the case where the magnetization center position 5pa of the driving magnet 5p is shifted upward in the pitch due to manufacturing errors. In this case, FIG. 4C shows a case where position adjustment is performed from the state of FIG.

  In FIG. 4A, the upper yoke 31p that moves integrally with the shift frame 3 (not shown) is pulled on both poles of the two-pole magnetized driving magnet 5p held by the shift base 7 (not shown). It is stationary at a magnetically balanced position.

  At this time, the optical axis 33a of the correction lens group 33 held in the shift frame 3 coincides with the optical axes of the other lens groups in the lens barrel.

  On the other hand, in FIG. 4B, the magnetization center position 5pa of the drive magnet 5p is shifted upward in the outer range of the drive magnet 5p as compared to FIG. 4A. Therefore, the upper yoke 31p pulled by the driving magnet 5p is magnetically balanced at a position shifted upward in the pitch direction as compared with FIG.

  Therefore, the optical axis 33a of the correction lens group 33 is shifted above the optical axis 33b of the other lens group in the lens barrel.

  In FIG. 4C, the magnetic balance position is adjusted by using an adjustment screw (adjustment mechanism) 8p. By tightening the adjustment screw 8p with respect to the shift base 7 so as to move downward in the pitch direction, the tip of the adjustment screw 8p pushes the drive magnet 5p and the back yoke 6p downward in the pitch direction and moves them.

  Here, the upper yoke 31p moves along the movement of the driving magnet 5p and the back yoke 6p so as to be magnetically balanced. Therefore, since the shift frame 3 moves downward in the pitch direction, the optical axis 33a of the correction lens group 33 can be made to coincide with the optical axes 33b of other lens groups in the lens barrel.

  An example of a method for confirming the coincidence of the optical axes 33a and 33b is a known method of passing laser light along the optical axis 33b of another lens group in the lens barrel and observing its contrast. It is done.

  As a result, the position of the optical axis 33a of the correction lens group 33 can be adjusted without directly shaking the shift frame 3. The procedure is the same for the yaw direction.

  As described above, the optical axis 33a of the correction lens group 33 can be made to coincide with the optical axes 33b of other lens groups in the lens barrel only by adjusting the tightening of the adjusting screws 8p and 8y.

  In this embodiment, the position of the optical axis 33a of the correction lens group 33 is adjusted by adjusting the positions of the drive magnet 5p and the back yoke 6p. The same kind of effect can be obtained by adjusting only the driving magnet or only the back yoke.

  Further, since gravity corresponding to its own weight acts on the shift frame 3 in a posture in which the lens barrel is horizontal, the correction lens group 33 is shifted downward in the pitch direction as compared with the upward posture. However, by adjusting the position of the driving magnet 5p and the back yoke 6p in the present embodiment in a posture in which the lens barrel is horizontal, it is possible to adjust in consideration of the deviation of its own weight.

  Furthermore, in the present embodiment, adjustment is performed for a change in the magnetic balance position caused by the deviation of the magnetization center position 5pa of the drive magnet 5p. In addition, a deviation in the outer dimensions of the upper yoke 31p, the driving magnet 5p, the back yoke 6p, a deviation in the amount of magnetization of the driving magnet 5p, a deviation in the installation position of the upper yoke 31p, the driving magnet 5p, the back yoke 6p, etc. The same change in the magnetic balance position will occur.

  However, in any case, as shown in the present embodiment, the optical axis 33a of the correction lens group 33 is adjusted to the light of the other lens group in the lens barrel by adjusting the positions of the driving magnet 5p and the back yoke 6p. It can coincide with the axis 33b.

  FIG. 5 is a schematic view of a mechanism for adjusting the positions of the drive magnet 5p and the back yoke 6p in Embodiment 1 of the present invention.

  A holding frame 71p is provided on a part of the shift base 7 (not shown) that holds the driving magnet 5p and the back yoke 6p (not shown). The shift base 7 and the holding frame 71p are integrated. A beam shape 72p and a protrusion shape 73p are provided on a part of the holding frame 71p in the lower direction in the pitch direction. The protruding shape 73p is in contact with the driving magnet 5p and the back yoke 6p.

  Further, the adjustment screw 8p is tightened from above in the pitch direction of the holding frame 71p, and the tip 8pa of the holding frame 71p is in contact with the driving magnet 5p and the back yoke 6p, whereby the driving magnet 5p and the back yoke 6p are arranged in the pitch direction. The movement is regulated.

  Here, when the adjusting screw 8p is further tightened, the driving magnet 5p and the back yoke 6p are pushed downward in the pitch direction, and the beam shape 72p and the projection shape 73p are deformed. Therefore, the driving magnet 5p and the back yoke 6p move downward in the pitch direction while receiving the reaction force from the beam shape 72p and the protrusion shape 73p.

  Even if the tightening of the adjusting screw 8p is stopped, the driving magnet 5p and the back yoke 6p maintain the positions immediately before them.

  In this manner, the position in the pitch direction of the drive magnet 5p and the back yoke 6p can be adjusted within the deformation range of the beam shape 72p and the protrusion shape 73p. Also in the yaw direction, the driving magnet and the back yoke can be adjusted by the same mechanism as in the pitch direction. Therefore, when the shift unit is viewed from the front in a horizontal posture, before adjustment, the shift frame is in a magnetically balanced position in the upper left direction with respect to the optical axis of the other lens group in the lens barrel. As a result of the adjustment, the shift frame moves downward in the pitch direction and rightward in the yaw direction.

  FIG. 6 is a schematic diagram of an electric circuit configuration of an optical apparatus using the lens barrel in Embodiment 1 of the present invention. A subject image formed on a CCD (imaging device) 113 through a lens is subjected to processing such as predetermined amplification and γ correction by a camera signal processing circuit 101.

  The camera signal processing circuit 101 extracts a contrast signal in a predetermined region from the video signal subjected to the predetermined processing through the AF gate 102 or the AE gate 103.

  In particular, the contrast signal relating to the image passing through the AF gate 102 generates one or a plurality of outputs relating to the high frequency component by the AF circuit 104.

  The CPU 105 determines whether or not the exposure is optimal according to the signal level relating to the brightness of the AE gate 103. If not, the CPU 105 uses the aperture shutter drive source 109 to set the optimal aperture value or shutter speed. Drive the drive source.

  In the autofocus operation, the CPU 105 drives and controls the focus drive source drive circuit 111 which is a focus drive source so that the output of the high frequency component generated by the AF circuit 104 shows a peak.

  Further, in order to obtain appropriate exposure, the CPU 105 sets the average value of the signal output relating to the brightness that has passed through the AE gate 103 as a predetermined value, and controls the aperture shutter drive source so that the output of the aperture encoder 108 becomes this predetermined value. 109 is driven and controlled. The aperture diameter of the diaphragm is controlled.

  A focus origin sensor 106 using an encoder such as a photo interrupter detects an absolute reference position for detecting the absolute position of the focus lens group in the optical axis direction.

  The CPU 105 drives the zoom drive source 110 such as a motor via the zoom drive source drive circuit 112 to move the zoom portion of the zoom lens in the optical axis direction.

  A zoom origin sensor 107 using an encoder such as a photo interrupter detects an absolute reference position for detecting the absolute position of the zoom portion of the zoom lens in the optical axis direction.

  The detection of the shake angle in the pitch direction and the yaw direction in the photographing apparatus is performed by integrating the output of an angular velocity sensor such as a vibrating gyroscope fixed to the photographing apparatus, for example.

  The CPU 105 processes the outputs from the pitch angle detection sensor 114 that detects the shake in the pitch direction and the yaw angle detection sensor 115 that detects the shake in the yaw direction.

  The pitch coil drive circuit 116 is driven and controlled in accordance with the output from the pitch angle detection sensor 114, and energization control is performed on the pitch direction drive coil 32p (not shown).

  The yaw coil drive circuit 117 is driven and controlled in accordance with the output from the yaw angle detection sensor 115, and energization control to the yaw direction drive coil 32y is performed.

  With the above control, the shift frame 3 (not shown) shifts in the pitch direction and the yaw direction within the optical axis orthogonal plane. Outputs from the pitch position detection sensor 118 in the pitch direction and the yaw position detection sensor 119 in the yaw direction are processed by the CPU 105.

  When the correction lens group 33 (not shown) shifts, the passing light beam in the lens barrel is bent. Therefore, the correction lens group 33 is shifted to bend the passing light flux by the amount of bending to be canceled in the direction to cancel the change of the subject image on the CCD 113 that is originally caused by the shake of the photographing apparatus.

  This makes it possible to perform so-called image blur correction in which a subject image that is formed does not move on the CCD 113 even if the photographing apparatus is shaken. The CPU 105 obtains a difference between the shake signal of the photographing apparatus obtained by the pitch angle detection sensor 114 and the yaw angle detection sensor 115 and the shift amount signal obtained from the pitch position detection sensor 118 and the yaw position detection sensor 119. The shift coil 3 is shifted by the pitch coil drive circuit 116 and the yaw coil drive circuit 117 based on a signal obtained by performing amplification and appropriate phase compensation on the signal corresponding to the difference.

  By this control, the correction lens group 33 is positioned and controlled so as to make the above difference signal smaller and kept at the target position. With this configuration, image blur when the image pickup apparatus shakes is corrected.

  As described above, in this embodiment, the shift frame 3 holds the coil 32p and the upper coil 31p, and the shift base 7 holds the drive magnet 5p and the hack yoke 6p.

  Then, the position of at least one of the driving magnet 5p or the hack yoke 6p held by the shift base 7 is adjusted by the adjusting mechanism 8p.

  As a result, after the adjustment, it is not necessary to energize the coils for correcting the position of the correction lens group caused by the shift of the magnetic balance position. Thereby, the power consumption of the lens barrel is suppressed.

(Example 2)
FIG. 7 is a schematic diagram showing component position adjustment of the shift unit when the moving magnet type is used for driving the shift frame according to the second embodiment of the present invention. Note that the driving means in the pitch direction and the yaw direction and the magnetic balance position adjusting means, which will be described later, have the same configuration, and only have a phase difference of 90 degrees around the optical axis. Therefore, here, the driving means (pitch driving means) and the position adjusting means in the pitch direction will be described.

  7A shows a case where the magnetization center 12pa of the drive magnet 12p is at the outer shape center position, and FIG. 7B shows a case where the magnetization center position 12pa of the drive magnet 12p is shifted upward in the pitch. 7 (c) shows a case where position adjustment is performed from the state of FIG. 7 (b).

  In FIG. 7A, the upper yoke 11p is held by a sensor base (not shown) fixed to a shift base (not shown). The back yoke 14p is held by a shift base (not shown). The upper yoke 11p and the back yoke 14p pull the two-pole magnetized driving magnet 12p that moves integrally with a shift frame (not shown).

  And it is stationary at a magnetically balanced position. At this time, the optical axis 33a of the correction lens group 33 held in the shift frame coincides with the optical axis 33b of the other lens group in the lens barrel. The coil 13p is held on the shift base.

  On the other hand, in FIG. 7B, the magnetization center position 12pa of the drive magnet 12p is shifted downward in the outer shape range of the drive magnet 12p compared to FIG. Therefore, the driving magnet 12p pulled by the upper yoke 11p and the back yoke 14p is magnetically balanced at a position shifted upward in the pitch direction as compared with FIG.

  Therefore, the optical axis 33a of the correction lens group 33 is shifted above the optical axis 33b of the other lens group in the lens barrel.

  In FIG.7 (c), the magnetic balance position is adjusted using the adjustment screw (adjustment mechanism) 8p. By tightening the adjustment screw 8p against a shift base (not shown) so as to move downward in the pitch direction, the tip 8pa of the adjustment screw 8p pushes the back yoke 14p downward in the pitch direction and moves it.

  Here, the drive magnet 12p moves along the movement of the back yoke 14p so as to be magnetically balanced. Accordingly, since the shift frame moves downward in the pitch direction, the optical axis 33a of the correction lens group 33 can be made to coincide with the optical axes 33b of other lens groups in the lens barrel. One method for confirming the coincidence of the optical axes is a method using laser light as in the first embodiment.

  In this embodiment, the magnetic balance position is adjusted by adjusting the position of the back yoke (yoke) 14p held by the shift base. In addition, the same kind of effect can be obtained by adjusting only the upper yoke 11p or both the back yoke 14p and the upper yoke 11p.

  Further, since gravity corresponding to its own weight acts on the shift portion in a posture in which the lens barrel is horizontal, the correction lens group is shifted downward in the pitch direction as compared with the upward posture. However, by adjusting the position of the driving magnet and the back yoke in the present embodiment in a posture in which the lens barrel is horizontal, it is possible to perform adjustment in consideration of the deviation of its own weight.

  In the present embodiment, adjustment is performed for a change in the magnetic balance position caused by the deviation of the magnetization center position 12pa of the drive magnet 12p. In addition, there are deviations in the outer dimensions of the upper yoke 11p, the driving magnet 12p, and the back yoke 14p, deviations in the amount of magnetization of the driving magnet 12p, and deviations in the mounting positions of the upper yoke 11p, the driving magnet 12p, and the back yoke 14p. Arise. In such a case, the same change in the magnetic balance position occurs.

  However, in any case, as shown in the present embodiment, by adjusting the position of the back yoke 14p or the upper yoke 11p, the optical axis 33a of the correction lens group 33 is adjusted to other lens groups in the lens barrel. It can be made to coincide with the optical axis 33b.

  As described above, in each embodiment of the present invention, an adjustment mechanism is provided that can adjust the positions of the drive magnets and the yokes constituting the shift unit within the plane orthogonal to the optical axis.

  When the shift unit is assembled, the positions of the drive magnet and the yoke are adjusted so that the optical axis of the correction lens group for correcting image blur coincides with the optical axis of the other lens group in the lens barrel.

  As a result, after the adjustment, it is not necessary to energize the coils for correcting the position of the correction lens group caused by the shift of the magnetic balance position. Thereby, the power consumption of the lens barrel is suppressed.

  The lens barrel of the present invention can be applied to various optical devices such as a digital camera, a video camera, and a television camera having a vibration isolation mechanism.

Overview of a part of the shift unit of the first embodiment of the present invention 1 is an exploded perspective view of a part of a shift unit according to Embodiment 1 of the present invention. Sectional drawing of the actuator part in the moving coil type shift unit of a part of Example 1 of this invention (A) When the magnetizing center of the driving magnet is at the outer shape center position (b) The magnetizing center is in the upward direction of the pitch (C) When adjustment is performed in the state of FIG. 4 (b) Explanatory drawing of an example of the mechanism which adjusts the position of the drive magnet and back yoke in Example 1 of this invention. Explanatory drawing of the electric circuit structure of the optical apparatus using the lens barrel in Example 1 of this invention (A) When the magnetizing center of the driving magnet is at the outer shape center position (b) The magnetizing center is in the upward direction of the pitch. (C) When adjustment is performed in the state of FIG. 7B

Explanation of symbols

1. Flexible sheet metal 2. 2. Sensor base Shift frame 31. Upper yoke 31a. Projection 32p. Coil 32y. Coil 4. Ball 5p. Driving magnet 5y. Driving magnet 6p. Back yoke 6y. 6. Back yoke Shift base 8p. Adjustment screw 8y. Adjustment screw 9. Flexible 10 Flexible press sheet metal 11p. Upper yoke 12p. Driving magnet 13p. Coil 14p. Back yoke 101. Camera signal processing 102. AF gate 103. AE gate 104. AF circuit 105. CPU
106. Focus origin sensor 107. Zoom origin sensor 108. Aperture encoder 109. Aperture / shutter drive source 110. Zoom drive source 111. Focus drive source drive circuit 112. Zoom drive source drive circuit 113. CCD
114. Pitch angle detection sensor 115. Yaw angle detection sensor 116. Pitch coil drive circuit 117. Yaw coil drive circuit 118. Pitch position detection sensor 119. Yaw position detection sensor

Claims (5)

In a lens barrel having an image blur correction device that corrects image blur by shifting a shift frame holding an optical element in a plane orthogonal to the optical axis with respect to a shift base.
Of the shift frame and the shift base, a driving magnet is held on one side, and a coil is held on the other side.
The shift base holds a yoke, and shifts the shift frame by energizing the coil.
A lens barrel having an adjustment mechanism for adjusting a position of at least one of the drive magnet and the yoke within a plane orthogonal to the optical axis.   A coil and a yoke are held on the shift frame, a driving magnet and a yoke are held on the shift base, and the adjustment mechanism includes a driving magnet or a yoke held on the shift base. 2. The lens barrel according to claim 1, wherein at least one of the positions is adjusted.   The shift frame holds a driving magnet, the shift base holds a coil, and the adjustment mechanism adjusts the position of the yoke held by the shift base. The lens barrel according to claim 1. The adjustment mechanism includes a pitch driving unit that applies a driving force in the pitch direction to the shift frame, and a yaw driving unit that applies a driving force in the yaw direction,
4. The lens barrel according to claim 1, wherein the lens barrel is adjusted independently in the pitch direction and the yaw direction.   An optical apparatus comprising the lens barrel according to any one of claims 1 to 4.

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