JP2011227110A - Imaging element unit, automatic focusing device and imaging device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an imaging element unit, an automatic focusing device and an imaging device which can improve reliability against disturbance impacts while preventing vibrations when the imaging element is wobbling.SOLUTION: An imaging element unit 110 comprises: a weight 115 fixed on a sheet metal; and stoppers 118 which control the moving distance of the weight 115 in the optical axis direction OA by contacting the weight 115 when an impact is applied and which is placed in the position not contacting the weight 115 while an imaging element is wobbling.

Description

  The present invention relates to an imaging element unit, an automatic focus adjustment device, and an imaging device.

  Japanese Patent Application Laid-Open No. 2004-133867 discloses imaging in which the in-focus position is determined by finely moving (wobbling) the imaging element in the optical axis direction of the imaging optical system by a piezoelectric element during contrast-type autofocus (AF: autofocus adjustment). A device is proposed. Patent Document 2 proposes a stopper that regulates the movable range of the piezoelectric element.

Japanese Patent Laid-Open No. 2003-279846 Japanese Utility Model Publication No. 04-65466

  However, in the conventional image pickup apparatus, vibration occurs in the image pickup apparatus body while the image pickup element is wobbling, and the reliability against the disturbance impact is not sufficient.

  Therefore, the present invention provides an image sensor unit, an automatic focus adjustment apparatus, and an image pickup apparatus that can have high reliability against disturbance shock while preventing vibration while wobbling the image pickup element. For illustrative purposes.

  The image pickup device unit of the present invention has an automatic focus adjustment function that determines the direction in which the in-focus position is located by performing wobbling that minutely moves the image pickup device that photoelectrically converts the optical image formed by the image pickup optical system in the optical axis direction. An imaging device unit used in an imaging device, which is coupled to the imaging device, is deformed by receiving a force and deforms to move the imaging device in the optical axis direction, and is fixed to the deforming member, A weight that moves in a direction opposite to the imaging element in conjunction with the movement of the imaging element, and a deformation amount of the deformation member that is larger than a deformation amount of the deformation member in the optical axis direction when the imaging element wobbles And a stopper disposed at a position for regulating the movement.

  ADVANTAGE OF THE INVENTION According to this invention, the image pick-up element unit, the automatic focus adjustment apparatus, and image pick-up device which can improve the reliability with respect to a disturbance impact can be provided, preventing the vibration at the time of wobbling an image pick-up element.

FIG. 1 is a block diagram of the imaging apparatus of the present embodiment. FIG. 2 is a schematic cross-sectional view of the image sensor unit shown in FIG. 3 is a schematic cross-sectional view of the imaging element unit shown in FIG. 2 in which a piezoelectric element is contracted and deformed by applying a voltage. 4 is a schematic cross-sectional view of the imaging element unit shown in FIG. 2 in which the fixing member is in contact with the upper first unit. FIG. 5 is a schematic cross-sectional view of the image sensor unit shown in FIG. 2 when an impact is applied. 6 is a schematic cross-sectional view of a modification of the image sensor unit shown in FIG. 7 is a schematic cross-sectional view of the image sensor unit shown in FIG. 6 when an impact is applied.

  FIG. 1 is a block diagram illustrating the configuration of the imaging apparatus according to the present exemplary embodiment, and a broken line represents an optical axis. The image pickup apparatus according to the present embodiment is a digital video camera, but the type thereof such as a digital still camera is not limited. In addition, the imaging apparatus has an automatic focus adjustment function (AF function) that determines the direction in which the in-focus position (contrast peak position) is present by performing wobbling that slightly moves the imaging element in the optical axis direction.

  Although the imaging apparatus includes a main body 100 and a lens unit 150 that is replaceably attached to the main body 100, the imaging apparatus of the present invention may be a lens-integrated type. Mechanical attachment / detachment of the main body 100 and the lens unit 150 is performed via the mount 101 of the main body 100 and the mount 151 of the lens unit 150. The main body 100 and the lens unit 150 are electrically connected and disconnected through the connector 105 of the main body 100 and the connector 155 of the lens unit 150.

  The main body 100 includes an image sensor unit 110, a signal processing circuit 120, a system control unit 122, and other members.

  FIG. 2 is a cross-sectional view of the image sensor unit 110 used in the image pickup apparatus. The image sensor unit 110 includes an image sensor 111, a fixing member 112, a sheet metal 113, a plurality of support members 114, a weight 115, a piezoelectric element 116, a plurality of (four in FIG. 2) stoppers 117, and a pair of stoppers 118.

  In FIG. 2, OA is the optical axis direction or a direction parallel to the optical axis direction (hereinafter simply referred to as “optical axis direction”), and H is a direction orthogonal to the optical axis direction OA.

  The imaging element 111 is a CMOS or CCD that photoelectrically converts an optical image formed by the imaging optical system, and is configured to slightly move (wobble) in the optical axis direction OA of the imaging optical system during contrast AF.

  The fixing member 112 is a rigid member that fixes the image sensor 111 in the optical axis direction OA with high accuracy and has a plate shape in this embodiment. The fixing member 112 extends along a horizontal direction H orthogonal to the optical axis direction OA, and has a front surface 112a and a back surface 112b on the opposite side of the front surface 112a. In FIG. 2, the surface 112a of the fixing member 112 is the subject side or the lens unit 150 side.

The front surface 112 a is a flat surface having a central portion 112 a ₁ to which the image sensor 111 is fixed and a pair of end portions 112 a ₂ that can come into contact with the stopper 117. Central portion 112a ₁ is in the central portion of the horizontal direction H of the fixing member 112, the pair of end portions 112a ₂ at the end of the horizontal direction H of the outer fixing member 112 of the central portion 112a _1.

The back surface 112 b has a pair of fixing portions 112 b ₁ to which ends of a pair of vertical portions 113 b of the metal plate 113 are fixed, and a pair of end portions 112 b ₂ that can contact the stopper 117. The pair of end portions 112b ₂ are located on the opposite side of the pair of end portions 112a ₂ , and the pair of end portions 112b ₂ are provided outside the pair of fixing portions 112b ₁ .

  The fixing member 112 moves together with the image sensor 111 along the optical axis direction OA, and the front surface 112a and the back surface 112b come into contact with the stopper 117 to restrict the operation range. The moving range of the fixing member 112 is between a position where the back surface 112 b is in contact with the stopper 117 and a position where the front surface 112 a is in contact with the stopper 117.

  In this moving range, the wobbling of the image sensor 111 is possible. Further, since the fixing member 112 is a rigid member, the image sensor 111 can be fixed with high accuracy in the optical axis direction OA. The fixing member 112 is driven by a pair of vertical portions 113 b of the sheet metal 113 connected to the fixing member 112.

  The sheet metal 113 is mounted with a weight 115 and a piezoelectric element 116, is coupled to the image sensor 111 via a fixing member 112, and is deformable by receiving force to move the image sensor 111 in the optical axis direction OA. It is a deformable member. The sheet metal 113 may be directly connected to the image sensor 111. The sheet metal 113 receives a driving force by the piezoelectric element 116 during wobbling, but receives an impact force due to the inertial force of the weight 115 when a disturbance impact is applied.

  The sheet metal 113 has a U-shaped cross section formed by vertically bending an end of a planar sheet metal. More specifically, the sheet metal 113 includes a horizontal portion 113a extending in the horizontal direction H and a pair of vertical portions 113b extending in the optical axis direction OA.

  The horizontal portion 113a is a driven portion that can be elastically deformed by applying a driving force from the piezoelectric element 116 during wobbling, and can displace the vertical portion 113b along the optical axis direction OA via the support member 114. . Further, the horizontal portion 113a receives a force from the weight 115 when an impact is applied. The pair of vertical portions 113 b are displacement portions that are connected to both ends of the horizontal portion 113 a and move the image sensor 111 via the fixing member 112.

  The horizontal portion 113 has a front surface on the subject side and a back surface on the opposite side of the front surface.

Surface of the horizontal portion 113a has a central portion 113a ₁ of the piezoelectric element 116 is fixed, a pair of respectively by the corresponding upper supporting member 114 is supported the support portion 113a _2. The central portion 113a ₁ is in the central portion in the horizontal direction H of the horizontal portion 113a, and the pair of support portions 113a ₂ are outside the central portion 113a ₁ .

The rear surface of the horizontal portion 113a has a central portion 113a ₃ the weight 115 is fixed, a pair of respectively by a support member 114 of the corresponding lower side is supported the support portion 113a _4. The central portion 113a ₃ in the middle portion in the horizontal direction H of the horizontal portion 113a, a pair of end portions 113a ₄ is outside of the central portion 113a _3, on the opposite side with respect to the horizontal portion 113a of the pair of support portions 113a _2.

One end of each vertical portion 113b is fixed to the horizontal portion 113a, the other end is fixed to the fixing portion 112b ₁ of the rear surface 112b of the fixing member 112.

  In FIG. 2, four support members 114 are provided symmetrically above and below the horizontal portion 113 a of the sheet metal 113. In addition, although the shape of each support member 114 has a triangular shape in FIG. 2, the cross-sectional shape is not limited to a triangular shape such as a circle, an ellipse, or a rhombus. The support member 114 may have an adjustment mechanism that adjusts the position of the image sensor 111 in the optical axis direction OA.

  Each support member 114 is fixed to the main body 100 and functions as a fulcrum when the horizontal portion 113a of the sheet metal 113 is elastically deformed. For this reason, the displacement of the pair of vertical portions 113b can be stabilized. The support member 114 may be a part of the main body 100.

Weight 115 is fixed to the central portion 113a ₃ of the rear surface of the horizontal portion 113a of the sheet metal 113, the imaging device 111 in conjunction with the movement of the imaging device 111 moves in the opposite direction in the optical axis direction OA. The weight 115 has a function of canceling or reducing vibration generated by the movement of the center of gravity of the image sensor unit 110 when the image sensor 111 wobbles. That is, the weight 115 functions as a balanced weight (counterweight or counterbalance) that maintains the balance of the image sensor unit 110, but it is sufficient to reduce the center of gravity movement to some extent, and therefore it is sufficient to maintain the balanced state to some extent. The weight 115 faces the stopper 118 on the surface opposite to the sheet metal 113.

  During wobbling, the weight 115 is simultaneously displaced when the horizontal portion 113 of the sheet metal 113 is moved by the piezoelectric element 116. Since the imaging element 111 and the weight 115 move in the direction opposite to the optical axis direction OA, vibration of the main body 100 during wobbling can be reduced. The weight 115 is adjusted in advance to an appropriate weight for reducing vibration. Since the piezoelectric element 116 also moves in the direction opposite to the imaging element 111 together with the weight 115, the total weight of the piezoelectric element 116 and the weight 115 may be set so as to balance the weight of the imaging element 111.

The piezoelectric element 116 is attached to the central portion 113 a ₁ of the surface of the horizontal portion 113 a of the sheet metal 113. The piezoelectric element 116 is driving means for wobbling the image sensor 111 through the pair of vertical portions 113b and the fixing member 112 by deforming the horizontal portion 113a. The piezoelectric element 116 faces the stopper 118 on the surface opposite to the sheet metal 113.

  The piezoelectric element 116 of this embodiment is a thin plate-shaped piezoelectric ceramic element such as lead zirconate titanate (PZT), and is attached to the sheet metal 113. The number of attached piezoelectric elements 116 is not limited. The piezoelectric element 116 is connected to a voltage source (not shown), and voltage application (voltage amount and application timing) to the piezoelectric element 116 is controlled by the system control unit 122.

In FIG. 2, when a voltage is applied to the piezoelectric element 116, the piezoelectric element 116 expands and contracts in the horizontal direction H, and the horizontal portion 113a of the sheet metal 113 to which the piezoelectric element 116 is fixed is also deformed at the same time. At that time, the sheet metal 113 is deformed with the pair of support portions 113a ₂ and the pair of support portions 113a ₄ as contact portions between the support member 114 and the sheet metal 113 as fulcrums. As a result, the pair of vertical portions 113b are displaced, and the image sensor 111 can be moved along the optical axis direction OA via the fixing member 112 to which the pair of vertical portions 113b are connected.

  The driving means for driving the fixing member 112 is not limited to the combination of the sheet metal 113 and the piezoelectric element 116. For example, a motor is used as the driving means, or a link mechanism is used as the deforming member.

  The plurality of stoppers (second stoppers) 117 are fixed to the main body 100, and in FIG. The stopper 117 is composed of an elastic member that absorbs an impact such as rubber or resin, and the shape of the portion that contacts the fixing member 112 is not limited. Further, the size of the stopper 117 is not limited.

  The stopper (second stopper) 117 regulates the amount of movement of the fixing member 112 (and hence the image sensor 111) in the optical axis direction OA by contacting the fixing member 112. The stopper 117 may be a part of the main body 100.

  The pair of stoppers (first stoppers) 118 are disposed at positions that restrict the deformation amount of the sheet metal 113 larger than the deformation amount of the sheet metal 113 in the optical axis direction OA when the image sensor 111 wobbles. Accordingly, it is possible to protect the sheet metal 113 and the members (the piezoelectric element 116 and the weight 115) fixed thereto when the impact is applied from being damaged beyond the amount of deformation or movement during wobbling.

  Each stopper 118 is fixed to the main body 100, and is comprised from the elastic member which absorbs impacts, such as rubber | gum and resin. In FIG. 2, the pair of stoppers 118 includes an upper stopper 118 provided on the subject side of the piezoelectric element 116 and a lower stopper 118 provided on the photographer side of the weight 115. The size and shape of the stopper 118 are not limited. The stopper 118 may be a part of the main body 100.

  While the image sensor 111 is wobbling, the upper stopper 118 is disposed at a position where it does not contact the piezoelectric element 116, and the lower stopper 118 is disposed at a position where it does not contact the weight 115. Accordingly, the stopper (first stopper) 118 can stabilize the wobbling operation without hindering the movement of the image sensor 111 during wobbling. When the piezoelectric element 116 is further deformed after the stopper 117 contacts the fixing member 112, the stopper 118 may contact the piezoelectric element 116 or the weight 115.

  The upper stopper 118 is provided at a position where it can come into contact with the piezoelectric element 116 when an impact due to disturbance is applied, and the lower stopper 118 is provided at a position where it can contact the weight 115 when an impact due to disturbance is applied. It has been. Thereby, it is possible to prevent the piezoelectric element 116 and the sheet metal 113 from being excessively deformed and damaged when an impact is applied due to a disturbance.

  Thus, the movement range given by the stopper 118 is wider than the movement range given by the stopper 117. Further, the movement range provided by the stopper 118 (that is, the position of the stopper 118 in the optical axis direction OA) is set so as to prevent the piezoelectric element 116 and the sheet metal 113 from being damaged. It is set to be variable in consideration of the characteristics. Further, the timing for changing the movement range provided by the stopper 118 for the piezoelectric element 116 may be interlocked with the impact detection or the mechanical lock mechanism.

  The signal processing circuit 120 is connected to the image sensor 111 and the system control unit 122, receives and processes image information photoelectrically converted by the image sensor 111 as an electrical signal, and transmits it to the system control unit 122.

  The system control unit 122 is connected to the image sensor unit 110, the signal processing circuit 120, and the memory 124, and is also connected to the connector 105. The system control unit 122 performs AF control including wobbling and image processing control, and communicates with a lens control unit (not shown) of the lens unit 150 via the connector 105.

  The memory 124 holds information necessary for contrast AF.

  The image sensor unit 110, the signal processing circuit 120, the system control unit 122, and the memory 124 constitute an automatic focus adjustment device that determines the direction in which the in-focus position is located by wobbling the image sensor 111 in the optical axis direction OA.

  The lens unit 150 includes an imaging optical system 160 that forms an optical image of a subject. The imaging optical system 160 includes a plurality of lenses that collect an optical image of a subject on the imaging element 111. Some of the plurality of lenses include a variable power lens (zoom lens) for variable power and a focus lens for focus adjustment, and are movable along the optical axis direction OA based on a command from the system control unit 122. It is configured. The focus adjustment may be performed only by moving the image sensor 111 and the focus lens may be omitted.

  In contrast AF, the focus lens or the image sensor 111 is moved from the current position of the image sensor 111 to the contrast peak position (focus position). The image sensor 111 is moved in the optical axis direction to determine the direction in which the focus position is located. Wobbling back and forth along OA. Therefore, the system control unit 122 applies a voltage to the piezoelectric element 116 from a voltage source (not shown) during wobbling.

  FIG. 3 is a cross-sectional view of the imaging element unit 110 in which a voltage is applied to the piezoelectric element 116 and the piezoelectric element 116 contracts and deforms in the H1 direction. When the piezoelectric element 116 contracts, the horizontal portion 113a of the sheet metal 113 is deformed so as to protrude toward the photographer. However, since the horizontal portion 113a is supported by the support member 114, the end of the horizontal portion 113a (or the vertical portion 113b). ) Moves to the subject direction OA1 in the optical axis direction. As a result, the image sensor 111 and the fixing member 112 also move in the optical axis direction subject direction OA1.

  On the other hand, the weight 115 fixed to the back surface of the horizontal portion 113a moves in the optical axis direction photographer direction OA2. Since the image sensor 111 and the weight 115 always move in the opposite directions, the center of gravity shift due to the movement of the image sensor 111 is reduced, and as a result, vibration transmitted to the main body 100 is reduced.

  FIG. 3 shows an example in which the piezoelectric element 116 contracts, but when a voltage is applied to the piezoelectric element 116 in the direction in which the piezoelectric element 116 extends, the imaging element 111 moves in the optical axis direction toward the photographer OA2. The weight 115 moves to the subject direction OA1 in the optical axis direction. Also in this case, the shift of the center of gravity due to the movement of the image sensor 111 is reduced, and as a result, vibration transmitted to the main body 100 is reduced.

In FIG. 3, if the piezoelectric element 116 continues to contract due to the application of voltage, the image sensor 111 continues to move toward the subject OA < _b > 1 in the optical axis direction. However, when the end 112 a ₂ of the fixed member 112 contacts the stopper 117, the image sensor 111. Stops moving. FIG. 4 is a cross-sectional view of the image sensor unit 110 at this time.

  When the fixing member 112 comes into contact with the stopper 117, the image sensor 111 is restricted from moving in the optical axis direction OA, and at the same time, deformation of the piezoelectric element 116 and the sheet metal 113 is restricted. In FIG. 4, the weight 115 is not in contact with the stopper 118, and a gap indicated by a dotted line A exists between them.

  The stopper 117 is configured so that the imaging element 111 contacts the stopper 117 before the weight 115 or the piezoelectric element 116 contacts the stopper 118 during wobbling and when an impact is applied, in order to regulate the amount of movement of the imaging element 111. Has been.

  In this way, the system control unit 122 moves the image sensor 111 from the current position to the front side and the rear side, acquires the contrast value (AF evaluation value) at each position from the signal processing circuit 120, and stores it in the memory 124. To do. Thereafter, the system control unit 122 determines that the direction in which the AF evaluation value increases by comparing the AF evaluation values stored in the memory 124 is the direction in which the focus position is located. Thereafter, the system control unit 122 moves the focus lens (not shown) or the image sensor 111 in a direction where the in-focus position is located.

  FIG. 5 is a cross-sectional view of the image sensor unit 110 when an impact is applied to the main body 100. When the impact of the subject direction OA1 in the optical axis direction is applied to the main body 100, the image sensor 111 moves, for example, in the subject direction OA1 in the optical axis direction by its own inertial force, and as a result, the fixing member 112 collides with the stopper 117. When the fixing member 112 comes into contact with the stopper 117, the movement of the image sensor 111 is limited, and collision of the image sensor 111 with other components can be prevented.

  On the other hand, the weight 115 generates a force that moves toward the subject OA1 in the optical axis direction due to its own inertial force due to an impact, and the sheet metal 113 needs to be deformed by the piezoelectric element 116, so that the rigidity is set low. For this reason, the inertial force generated in the weight 115 may cause the weight 115 to move while deforming the sheet metal 113.

  The weight 115 continues to move until the piezoelectric element 116 collides with the stopper 118. Since the piezoelectric element 116 is made of a ceramic material, it may be damaged if it is largely deformed. However, the piezoelectric element 116 whose deformation is restricted by the stopper 118 can be avoided. It is desirable that the stopper 118 is set at a position where the stopper is not damaged even if the piezoelectric element 116 contacts due to deformation.

  As described above, since the image sensor unit 110 of the present invention has the weight 115, the vibration of the main body 100 due to the movement of the image sensor 111 during wobbling can be reduced. Further, when the stopper 118 is in contact with one of the metal plate 113 and the weight 115 when an impact is applied, the amount of movement in the optical axis direction OA is restricted, and the piezoelectric element 116 and the metal plate 113 are prevented from being damaged, thereby being reliable against disturbance shock. To improve. Furthermore, since the stopper 118 is disposed at a position where it does not come into contact with the sheet metal 113 or the weight 115 while the image sensor 111 is wobbling, wobbling is not hindered.

  Since the stopper 118 limits deformation of the piezoelectric element 116 and the sheet metal 113, the stopper 118 contacts the member connected to the weight 115 instead of contacting the weight 115, or is attached to the sheet metal 113 or a member connected thereto. You may touch.

  Such an example will be described with reference to FIGS. Here, FIG. 6 is a cross-sectional view of an image sensor unit 110A which is a modification of the image sensor unit 110 shown in FIG. FIG. 7 is a cross-sectional view of the image sensor unit 110A when an impact is applied.

  In the image sensor unit 110A, the sheet metal 113A has a horizontal portion 113c longer than the horizontal portion 113a, and a pair of protruding portions 113d protruding from the pair of vertical portions 113b are formed on both sides of the horizontal portion 113c.

  A support member 114, a weight 115A, and a stopper 118 are formed on the surface (subject) side of each overhang 113d in order from the center toward the outside. Further, a support member 114 and a stopper 118 are formed in order along the direction from the center to the outside on the back surface (photographer) side of each overhang 113d. A pair of support members 114 and a pair of stoppers 118 are provided symmetrically with respect to each overhang portion 113d.

  The support member 114 is the same as the image sensor unit 110 in that it functions as a fulcrum for the deformation of the vertical portion 113b when the piezoelectric element 116 is deformed, but the image sensor unit is located outside the pair of vertical portions 113b. 110 is different.

  Since the weight 115A is fixed to the surface of each overhang 113d on the subject side and the stopper 118 is provided at a position in contact with the overhang 113d, the image sensor unit 110A is lighter than the image sensor unit 110. The thickness in the axial direction OA is reduced. That is, in the image sensor unit 110A, the stopper 118 does not come into contact with the weight 115A to regulate the amount of movement thereof, but contacts the overhanging portion 113d to regulate the amount of movement.

  The wobbling operation of the image sensor unit 110A is the same as that of the image sensor unit 110. That is, the center-of-gravity shift due to movement of the imaging element 111 by the pair of weights 115A is reduced, and as a result, vibration transmitted to the main body 100 is reduced. Unlike the image sensor unit 110, the image sensor unit 110A is provided with a pair of weights 115A, so that the weight of each weight 115A is about half of the weight 115.

  On the other hand, when an impact is applied, as shown in FIG. 7, both move toward the subject OA1 in the optical axis direction mainly due to the inertial force of the image sensor 111 and the weight 115A. At this time, as a result of the fixing member 112 colliding with the stopper 117, the movement of the image sensor 111 is restricted, and as a result of the protruding portion 113d of the sheet metal 113 colliding with the stopper 118, the deformation of the sheet metal 113A is restricted.

  Although the deformation of the sheet metal 113A becomes large near the contact portion with the support member 114, the movement of the sheet metal 113A is restricted by the stopper 118, so that the sheet metal 113A is protected from breakage.

  As mentioned above, although the preferable Example of this invention was described, this invention is not limited to these Examples, A various deformation | transformation and change are possible within the range of the summary.

  The imaging device can be applied to use for imaging a subject.

110, 110A Image sensor unit 111 Image sensor 112 Fixing member 113, 113A Sheet metal 115, 115A Weight 116 Piezoelectric element 117 Stopper (second stopper)
118 Stopper (first stopper)

Claims (4)

Image sensor used in an image pickup apparatus having an automatic focus adjustment function for determining a direction in which an in-focus position is located by performing wobbling that minutely moves an image sensor that photoelectrically converts an optical image formed by an image pickup optical system in an optical axis direction A unit,
A deformation member coupled to the image sensor and moving the image sensor in the direction of the optical axis by being deformed by receiving a force;
A weight fixed to the deformable member and moving in the opposite direction to the image sensor in conjunction with the movement of the image sensor;
A stopper disposed at a position that regulates a deformation amount of the deformation member that is larger than a deformation amount of the deformation member in the optical axis direction when the image sensor wobbles;
An image pickup device unit comprising:   The image sensor unit according to claim 1, wherein the position of the stopper in the optical axis direction is configured to be variable. An automatic focusing device that determines the direction in which the in-focus position is located by performing wobbling that minutely moves an image sensor that photoelectrically converts an optical image formed by an imaging optical system in the optical axis direction,
A deformation member coupled to the image sensor and moving the image sensor in the direction of the optical axis by being deformed by receiving a force;
A weight fixed to the deformable member and moving in the opposite direction to the image sensor in conjunction with the movement of the image sensor;
A stopper disposed at a position that regulates a deformation amount of the deformation member that is larger than a deformation amount of the deformation member in the optical axis direction when the image sensor wobbles;
An automatic focusing apparatus characterized by comprising:   An image pickup apparatus comprising the automatic focus adjustment apparatus according to claim 3.