Optical vibration isolation device, optical device, and magnetic sensor fixing method

Abstract

This invention provides an optical vibration isolation device, an optical device, and a magnetic sensor fixing method that allow a magnetic sensor for detecting the position of a lens for vibration correction to be easily and accurately attached to a base member. [Solution] The optical vibration isolation device comprises a base member, a lens holding frame configured to be movable along a plane perpendicular to the optical axis relative to the base member, a magnetic material that moves integrally with the lens holding frame and generates a magnetic field, a position detection Hall element 224 that detects changes in the magnetic field corresponding to the movement of the lens holding frame, and a sensor mounting member 240 fixed to the base member. The base member has a positioning section 134, and the position detection Hall element 224 is positioned by the positioning section 134 using the sensor mounting member 140. The base member is composed of a separate component from the sensor mounting member 240.

Description

Technical Field

[0001] The present invention relates to an optical vibration-proof device, an optical device, and a method for fixing a magnetic sensor, and particularly relates to a technique for attaching a magnetic sensor for detecting the position of an image stabilization lens to a base member.

Background Art

[0002] Generally, in an optical vibration-proof device, an image stabilization lens is moved within a plane orthogonal to the optical axis to suppress image blur caused by vibrations of the optical device such as camera shake during hand-held shooting.

[0003] Patent Document 1 describes a technique for positioning a magnetic sensor (Hall element) for detecting the position of an image stabilization lens.

[0004] The optical vibration-proof device described in Patent Document 1 includes a lens holding frame that holds an image stabilization lens, a base member that supports the lens holding frame so as to be displaceable along a plane orthogonal to the optical axis, and a flexible substrate on which a Hall element for detecting a change in the magnetic field of a magnet provided on the lens holding frame is mounted. The flexible substrate is positioned and fixed on one surface of the base member (the surface opposite to the lens holding frame).

[0005] Further, the Hall element mounted on the flexible substrate protrudes from the other surface of the lens holding frame (the surface on the lens holding frame side) through an opening formed in the base member, and the protruding portion of the Hall element is sandwiched between a pair of Hall element biasing portions and a Hall element fixing portion integrally formed with the base member at the peripheral portion of the opening formed in the base member.

Prior Art Documents

Patent Documents

[0006]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0007] One embodiment of the technology disclosed herein provides an optical vibration isolation device, an optical device, and a magnetic sensor fixing method that enable a magnetic sensor for detecting the position of a vibration correction lens to be attached to a base member in a simple, accurate, and reliable manner, and that prevents positional displacement due to impact or aging. [Means for solving the problem]

[0008] An optical vibration isolation device according to a first aspect of the present invention comprises a base member, a lens holding frame configured to be movable along a plane perpendicular to the optical axis relative to the base member, a magnetic material that moves integrally with the lens holding frame and generates a magnetic field, a magnetic sensor that detects changes in the magnetic field corresponding to the movement of the lens holding frame, and a sensor mounting member fixed to the base member, wherein the base member has a positioning portion, and the sensor mounting member positions the magnetic sensor relative to the positioning portion, and the base member is composed of a separate component from the sensor mounting member.

[0009] In an optical vibration isolation device according to a second aspect of the present invention, the magnetic sensor is preferably mounted on a printed circuit board, and the printed circuit board is preferably fixed to the base member at a position between the lens holding frame and the base member.

[0010] In an optical vibration isolation device according to a third aspect of the present invention, the positioning portion preferably has a relief portion to avoid interference with the printed circuit board when the magnetic sensor comes into contact with the positioning portion.

[0011] In the optical vibration isolation device according to the fourth aspect of the present invention, the printed circuit board is preferably a flexible printed circuit board.

[0012] In the optical vibration isolation device according to the fifth aspect of the present invention, it is preferable that the sensor mounting member and the base member each have a position regulating portion that allows for direct position regulating.

[0013] In an optical vibration isolation device according to a sixth aspect of the present invention, the base member has a first pin and a second pin, the sensor mounting member has a first hole and a second hole formed therein, and the sensor mounting member is preferably positioned on the base member by having the first hole and the second hole inserted through the first pin and the second pin, respectively.

[0014] In the optical vibration isolation device according to the seventh aspect of the present invention, the sensor mounting member is formed with fastening holes through which fasteners are inserted, and it is preferable that the sensor mounting member is fixed to the base member via fasteners that are inserted through the fastening holes and fixed to the base member.

[0015] In the optical vibration isolation device according to the eighth aspect of the present invention, it is preferable that the sensor mounting member also serves as a position regulating member for regulating the position of the magnetic sensor in the optical axis direction.

[0016] In the optical vibration isolation device according to the ninth aspect of the present invention, it is preferable that the sensor mounting member also serves as a fixing member for fixing the printed circuit board to the base member.

[0017] In an optical vibration isolation device according to a tenth aspect of the present invention, it is preferable that the sensor mounting member has an elastic portion, and that the magnetic sensor is biased by the elastic force generated in the elastic portion and brought into contact with the positioning portion.

[0018] In the optical vibration isolation device according to the 11th aspect of the present invention, the base member and the sensor mounting member are preferably molded products made of resin.

[0019] In the optical vibration isolation device according to the twelfth aspect of the present invention, the sensor mounting member is preferably a molded product made of a resin with higher molding fluidity than the base member.

[0020] In the optical vibration isolation device according to the 13th aspect of the present invention, it is preferable that the base member and the sensor mounting member are made of different materials.

[0021] In the optical vibration isolation device according to the 14th aspect of the present invention, it is preferable that the sensor mounting member is made of a material with a lower elastic modulus than the base member.

[0022] In the optical anti-vibration device according to the 15th aspect of the present invention, it is preferable that the base member and the sensor mounting member are made of materials having the same linear expansion coefficient.

[0023] In the optical anti-vibration device according to the 16th aspect of the present invention, it is preferable that the base member is a material having higher rigidity than the sensor mounting member.

[0024] In the optical anti-vibration device according to the 17th aspect of the present invention, it is preferable that the sensor mounting member has a shape in which the ratio of the total length to the cross-sectional area is larger than the shape of any part of the base member.

[0025] In the optical anti-vibration device according to the 18th aspect of the present invention, it is preferable that the magnetic body is a magnet provided on the lens holding frame.

[0026] The optical device according to the 19th aspect of the present invention includes any one of the optical anti-vibration devices according to the 1st aspect to the 18th aspect.

[0027] The invention according to the 20th aspect includes a base member, a lens holding frame configured to be movable along a plane orthogonal to the optical axis with respect to the base member, a magnetic body that moves integrally with the lens holding frame and generates a magnetic field, a magnetic sensor that detects a change in the magnetic field corresponding to the movement of the lens holding frame, a printed circuit board on which the magnetic sensor is mounted, and a sensor mounting member fixed to the base member. A method for fixing a magnetic sensor in an optical anti-vibration device that moves the lens holding frame within a plane orthogonal to the optical axis, wherein the printed circuit board is disposed on a surface of the base member facing the lens holding frame, the sensor mounting member is disposed on the base member with the printed circuit board interposed therebetween, and when fixing the sensor mounting member, the magnetic sensor is positioned by a positioning portion provided on the base member by the sensor mounting member, and the sensor mounting member is fixed to the base member in a state where the magnetic sensor is positioned by the positioning portion.

Brief Description of the Drawings

[0028] [Figure 1]Figure 1 is a block diagram showing one embodiment of a digital camera equipped with an optical image stabilization device. [Figure 2] Figure 2 is a conceptual diagram of the movement of the image stabilization lens. [Figure 3] Figure 3 is a block diagram of the main functions implemented by the camera microcontroller. [Figure 4] Figure 4 is a front view of the optical vibration isolation device according to the present invention. [Figure 5] Figure 5 is a rear view of the optical vibration isolation device shown in Figure 4. [Figure 6] Figure 6 is a front view of the optical image stabilization device with the lens holding frame exposed. [Figure 7] Figure 7 is a front view of the base member. [Figure 8] Figure 8 is a perspective view showing a first embodiment of the sensor mounting member. [Figure 9] Figure 9 is a plan view of the sensor mounting member shown in Figure 8. [Figure 10] Figure 10 is a plan view of the leading edge of a flexible printed circuit board. [Figure 11] Figure 11 is a plan view showing the sensor mounting member positioned at the tip of a flexible printed circuit board. [Figure 12] Figure 12 shows how a flexible printed circuit board is placed on a base member. [Figure 13] Figure 13 is a cross-sectional view along the line 13-13 in Figure 11. [Figure 14] Figure 14 is a plan view of the base member showing a flexible printed circuit board placed on the base member and two position-detecting Hall elements positioned by two sensor mounting members. [Figure 15] Figure 15 is a perspective view showing how the sensor mounting member is fixed to the base member using fasteners. [Figure 16] Figures 16(A) and (B) are a plan view and a side view of the sensor mounting member, respectively. [Figure 17] Figure 17 is a perspective view showing a second embodiment of the sensor mounting member. [Figure 18] Figure 18 is a plan view of the sensor mounting member shown in Figure 17. [Figure 19] Figure 19 is a plan view showing a third embodiment of the sensor mounting member. [Figure 20] Figure 20 is a plan view showing a fourth embodiment of the sensor mounting member. [Figure 21] Figure 21 shows another embodiment of the position detection unit for detecting the position of the lens holding frame. [Modes for carrying out the invention]

[0029] Preferred embodiments of the optical vibration isolation device, optical device, and magnetic sensor fixing method according to the present invention will be described below with reference to the attached drawings.

[0030] [Optical device] Figure 1 is a block diagram showing an embodiment of a digital camera that is an optical device equipped with an optical vibration isolation device according to the present invention.

[0031] The digital camera 1 shown in Figure 1 is a digital camera with an integrated lens and is equipped with a lens-shift type optical image stabilization device 100.

[0032] As shown in Figure 1, the digital camera 1 includes an imaging optical system 10, an image sensor 20, an image sensor drive unit 20A, an analog signal processing unit 22, a digital signal processing unit 24, a display unit 30, a storage unit 32, an operation unit 34, an angular velocity detection unit 40, a camera microcontroller 50, and the like.

[0033] The imaging optical system 10 is composed of multiple lens groups, including a focusing lens 12 and a shake correction lens 14. For convenience, only the focusing lens 12 and the shake correction lens 14 are shown in Figure 1. The imaging optical system 10 is equipped with an aperture 16 in its optical path.

[0034] The focus lens 12 is a lens for adjusting the focus, and adjusts the focus of the imaging optical system 10 by moving back and forth along the optical axis z. The focus lens 12 is driven by the focus lens drive unit 12A. The focus lens drive unit 12A includes a voice coil motor as an actuator and its drive circuit. The focus lens drive unit 12A drives the voice coil motor in response to instructions from the camera microcontroller 50, and moves the focus lens 12.

[0035] The image stabilization lens 14 is an image stabilization lens that corrects image stabilization caused by camera shake during handheld shooting with the digital camera 1, and corrects image stabilization by moving in a plane perpendicular to the optical axis z.

[0036] Figure 2 is a conceptual diagram of the movement of the image stabilization lens 14.

[0037] As shown in Figure 2, the shake correction lens 14 moves freely within the xy plane perpendicular to the optical axis z.

[0038] The x-axis is set to pass through the center of the image sensor 20 and be parallel to the top and bottom edges of the image sensor 20. The y-axis is set to pass through the center of the image sensor 20 and be parallel to the left and right edges of the image sensor 20. The direction of the x-axis is the horizontal direction of the digital camera 1, and the direction of the y-axis is the vertical direction of the digital camera 1. The x-axis and y-axis are orthogonal to each other.

[0039] To correct image shake, the shake correction lens 14 is moved in a direction that cancels out the shake. The shake correction lens 14 is driven by the optical image stabilization device 100. Details of the optical image stabilization device 100 will be described later.

[0040] The aperture 16 is composed of, for example, an iris diaphragm. The aperture 16 is driven by an aperture drive unit 16A, and its opening amount is variable. The aperture drive unit 16A includes a motor as an actuator and a drive circuit for the same. The aperture drive unit 16A drives the motor in response to instructions from the camera microcontroller 50, thereby varying the opening amount of the aperture 16.

[0041] The image sensor 20 is the part that receives a light image representing the subject image that passes through the imaging optical system 10 and converts it into an electrical signal (image signal). The image sensor 20 is composed of known image sensors such as CMOS type (Complementary Metal-Oxide Semiconductor) and CCD type (Charge Coupled Device).

[0042] The image sensor drive unit 20A drives the image sensor 20 in response to instructions from the camera microcontroller 50. By driving the image sensor 20 with the image sensor drive unit 20A, the charge accumulated in each pixel, corresponding to the amount of light received, is read out as an image signal.

[0043] The analog signal processing unit 22 acquires the analog image signal for each pixel output from the image sensor 20 and performs predetermined signal processing (e.g., correlated double sampling, amplification, etc.). The analog signal processing unit 22 includes an ADC (Analog to Digital Converter) and converts the analog image signal after predetermined signal processing into a digital image signal for output.

[0044] The digital signal processing unit 24 receives the digital image signal output from the analog signal processing unit 22 and performs predetermined signal processing (for example, grayscale conversion processing, white balance correction processing, gamma correction processing, demosaicing processing (also called "simultaneous processing"), luminance color difference conversion processing, etc.) to generate image data. The generated image data is output to the camera microcontroller 50.

[0045] Furthermore, the digital signal processing unit 24 detects the brightness information of the subject necessary for exposure control based on the captured image signal. The detected brightness information of the subject is output to the camera microcontroller 50.

[0046] Furthermore, the digital signal processing unit 24 detects the contrast information of the subject necessary for autofocus control based on the captured image signal. The detected contrast information is output to the camera microcontroller 50.

[0047] The display unit 30 displays various information, including images. The display unit 30 is comprised of a display device such as a liquid crystal display or an organic EL display (EL: Electro-Luminescent), and a drive circuit thereof.

[0048] The display unit 30 displays not only already captured images but also a live view. Live view is a function that displays images captured by the image sensor in real time. By displaying the live view, it is possible to capture images while checking the image on the display unit 30. The display unit 30 is also used as a display screen for the user interface when making various settings. The display on the display unit 30 is controlled by the camera microcontroller 50.

[0049] The storage unit 32 stores various types of data, including image data. The storage unit 32 comprises an internal memory and a control circuit for reading and writing data to the internal memory. The internal memory is composed of non-volatile memory such as EEPROM (Electrically Erasable Programmable Read Only Memory). The reading and writing of data to the storage unit 32 is controlled by the camera microcontroller 50.

[0050] The memory unit 32 can also be composed of external memory such as a so-called memory card. In this case, the digital camera 1 is provided with a card slot for inserting the memory card.

[0051] The control unit 34 includes common digital camera operating means such as a release button, power switch, imaging mode dial, shutter speed dial, exposure compensation dial, command dial, menu button, directional keys, select button, cancel button, erase button, and image stabilization switch, and outputs signals corresponding to the operation to the camera microcontroller 50.

[0052] Here, the image stabilization switch is a switch that turns the image stabilization function on and off. When the image stabilization switch is turned on, the image stabilization function is turned on, and when the image stabilization switch is turned off, the image stabilization function is turned off.

[0053] The angular velocity detection unit 40 detects the angular velocity of the digital camera 1 in the yaw direction and the pitch direction. The yaw direction is the direction of rotation around the y-axis, as shown in Figure 2, and is the lateral rotation direction of the digital camera 1. The pitch direction is the direction of rotation around the x-axis, as shown in Figure 2, and is the vertical rotation direction of the digital camera 1.

[0054] The angular velocity detection unit 40 includes a yaw direction angular velocity detection unit 40A and a pitch direction angular velocity detection unit 40B. The angular velocity signal indicating the yaw direction angular velocity detected by the yaw direction angular velocity detection unit 40A, and the angular velocity signal indicating the pitch direction angular velocity detected by the pitch direction angular velocity detection unit 40B, are output to the camera microcontroller 50.

[0055] The camera microcontroller 50 functions as a control unit that provides overall control over the operation of the digital camera 1. The camera microcontroller 50 also functions as an arithmetic processing unit that calculates the physical quantities necessary for controlling the digital camera 1.

[0056] The camera microcontroller 50 consists of a computer (microcomputer) equipped with a CPU (Central Processing Unit), RAM (Random Access Memory), and ROM (Read Only Memory). The camera microcontroller 50 implements various functions by executing a predetermined program. The program executed by the camera microcontroller 50, and various data necessary for control, are stored in the ROM.

[0057] Figure 3 is a block diagram showing the main functions implemented by the camera microcontroller.

[0058] As shown in Figure 3, the camera microcontroller 50 functions as a focus control unit 52, an exposure setting unit 54, an image sensor drive control unit 56, an aperture control unit 58, a shake correction control unit 60, a display control unit 62, a memory control unit 64, a shake detection unit 70, a shake correction amount calculation unit 90, and so on.

[0059] The focus control unit 52 performs autofocus control. That is, it detects the focus state and moves the focus lens 12 to adjust the focus.

[0060] The exposure setting unit 54 sets the shutter speed (exposure time) and aperture value that result in proper exposure based on the detection result of the brightness of the subject.

[0061] The image sensor drive control unit 56 controls the drive of the image sensor 20 via the image sensor drive unit 20A so that exposure is performed at the shutter speed set by the exposure setting unit 54.

[0062] The aperture control unit 58 controls the aperture opening amount of the aperture 16 via the aperture drive unit 16A so that it matches the aperture value set in the exposure setting unit 54.

[0063] The display control unit 62 controls the display of the display unit 30. For example, when displaying image data obtained by imaging on the display unit 30, the display control unit 62 converts the image data into a data format that can be displayed on the display unit 30 and outputs it to the display unit 30.

[0064] The memory control unit 64 controls the reading and writing of data to the storage unit 32. Image data obtained by imaging is stored in the storage unit 32 via the memory control unit 64. When reproducing image data stored in the storage unit 32, it is read from the storage unit 32 via the memory control unit 64.

[0065] The shake detection unit 70 calculates the amount of shake of the digital camera 1 based on the detection results of the angular velocity in the yaw direction and the pitch direction (pit) detected by the angular velocity detection unit 40. Specifically, it integrates the angular velocity signal in the yaw direction output from the yaw direction angular velocity detection unit 40A to calculate the amount of shake in the yaw direction. It also integrates the angular velocity signal in the pitch direction (pit) output from the pitch direction angular velocity detection unit 40B to calculate the amount of shake in the pitch direction (pit).

[0066] The shake correction amount calculation unit 90 calculates the shake correction amount based on the amount of shake in the yaw direction and the amount of shake in the pitch direction detected by the shake detection unit 70. The shake correction amount is calculated as the amount of movement of the shake correction lens 14 required to cancel out the detected shake. Specifically, the shake correction amount is calculated as the amount of movement of the shake correction lens 14 in the x-axis direction and the y-axis direction required to cancel out the shake.

[0067] The image tremor correction control unit 60 controls the movement of the image tremor correction lens 14 based on the amount of tremor correction calculated by the image tremor correction amount calculation unit 90, thereby correcting image tremor.

[0068] <Optical vibration isolation device> Figure 4 is a front view of the optical vibration isolation device according to the present invention. Figure 5 is a rear view of the optical vibration isolation device shown in Figure 4.

[0069] The optical vibration isolation device 100 includes a lens holding frame 110 that holds the vibration correction lens 14, a base member 120 that supports the lens holding frame 110 so as to be movable in a plane perpendicular to the optical axis, a rotation restricting unit 140 that restricts the rotation of the lens holding frame 110, a movable range restricting unit 160 that restricts the movable range of the lens holding frame 110, an x-axis drive unit 180 that drives the lens holding frame 110 in the x-axis direction, a y-axis drive unit 190 that drives the lens holding frame 110 in the y-axis direction, an x-axis position detection unit 210 that detects the position of the lens holding frame 110 in the x-axis direction, and a y-axis position detection unit 220 that detects the position of the lens holding frame 110 in the y-axis direction.

[0070] Figure 6 is a front view of the optical image stabilization device with the lens holding frame exposed.

[0071] The lens holding frame 110 has a cylindrical lens holding portion 110A and a flange portion 110B that protrudes outward from the lens holding portion 110A. The shake correction lens 14 is held on the inner circumference of the lens holding portion 110A.

[0072] Figure 7 is a front view of the base member.

[0073] The base member 120 in this example is a molded product made of resin. As the material for the base member 120, for example, glass fiber reinforced PC (polycarbonate) resin containing glass fibers can be used, but it is not limited to this, and various resins can be applied.

[0074] The base member 120 has a cylindrical lens barrel portion 120A, a fixed-side ball housing portion 128 for housing the ball 124, a fixed-side spring hanging portion 130 on which one end of the spring 126 is attached, and positioning portions 132 and 134 used for positioning the x-axis position detection Hall element 214 and the y-axis position detection Hall element 224, which will be described later.

[0075] These lens barrel portion 120A, fixed-side ball housing portion 128, fixed-side spring attachment portion 130, and positioning portions 132, 134, etc., are integrally molded from the same resin material to form the base member 120. The base member 120 has an opening 120B in the center.

[0076] The base member 120 includes a plurality of balls 124 that movably support the lens holding frame 110, and a plurality of springs 126 that bias the lens holding frame 110 toward the base member 120.

[0077] The fixed-side ball housing portion 128 is provided on the surface of the lens holding frame 110 facing the flange portion 110B. The fixed-side ball housing portion 128 is composed of a rectangular recess and is provided in three locations on the base member 120.

[0078] The fixed-side spring attachment portion 130 is composed of hook-shaped projections extending radially outward and is provided at four locations on the base member 120.

[0079] As shown in Figure 6, the lens holding frame 110 is provided with a movable ball housing portion 116 and a movable spring hanging portion 112, corresponding to the fixed ball housing portion 128 and fixed spring hanging portion 130 provided on the base member 120.

[0080] The movable ball housing portion 116 is composed of a circular recess and is provided on the surface facing the base member 120.

[0081] The movable spring attachment portion 112 is composed of hook-shaped projections extending radially outward and is provided at four locations on the flange portion 110B.

[0082] The spring 126 is a coil spring and is positioned parallel to the optical axis z. One end of the spring 126 is attached to the fixed-side spring attachment portion 130 of the base member 120, and the other end is attached to the movable-side spring attachment portion 112 of the lens holding frame 110. This biases the lens holding frame 110 toward the base member 120.

[0083] The lens holding frame 110 is biased toward the base member 120, causing the ball 124 to be sandwiched between the lens holding frame 110 and the base member 120. As a result, the lens holding frame 110 is supported so as to be movable relative to the base member 120.

[0084] The rotation restricting unit 140 comprises a guide shaft 142 arranged perpendicular to the optical axis z, a swing base member 144 that swingably supports the guide shaft 142, and a guide part 114 integrally provided with the lens holding frame 110 and guiding the lens holding frame 110 along the guide shaft 142.

[0085] The guide axis 142 is made of a round metal rod and is positioned perpendicular to the optical axis z.

[0086] The oscillating base member 144 includes a bracket 146 that holds the guide shaft 142, an oscillating shaft 148 provided on the bracket 146, and an axis base member 150 that supports the oscillating shaft 148. The bracket 146 has a base portion 146A and a pair of arm portions 146B extending parallel from the base portion 146A, and has an overall U-shape. The guide shaft 142 is supported at both ends by the pair of arm portions 146B. The oscillating shaft 148 is provided on the base portion 146A and is arranged parallel to the guide shaft 142. The axis base member 150 is integrally provided with the base member 120 and rotatably supports both ends of the oscillating shaft 148. The oscillating shaft 148 supported by the axis base member 150 is arranged perpendicular to the optical axis z. As a result, the guide shaft 142 is supported to swing freely around an axis perpendicular to the optical axis z.

[0087] The guide portion 114 is integrally provided with the flange portion 110B of the lens holding frame 110. The guide portion 114 has a guide groove 114A on the surface facing the base member 120 into which the guide shaft 142 fits. The guide groove 114A is a U-shaped groove and is positioned perpendicular to the optical axis of the vibration correction lens 14.

[0088] The lens retaining frame 110 is restricted from rotating around the optical axis by the guide shaft 142 fitting into the guide groove 114A of the guide portion 114. Furthermore, the lens retaining frame 110 is supported to slide freely along the guide shaft 142 by the guide groove 114A of the guide portion 114. As a result, the lens retaining frame 110 is supported to move freely in a plane perpendicular to the optical axis z. That is, since the guide shaft 142 is supported to swing freely around an axis perpendicular to the optical axis z, even if the lens retaining frame 110 moves in a plane perpendicular to the optical axis, its movement is not hindered. As a result, the lens retaining frame 110 is supported to move freely in a plane perpendicular to the optical axis z.

[0089] Thus, the lens holding frame 110 is supported so as to be movable in a plane perpendicular to the optical axis z, but it may also be supported so as to be movable in a plane that is substantially perpendicular to the optical axis z, to the extent that performance is not impaired.

[0090] As shown in Figure 6, the movable range restricting section 160 includes a movable range restricting hole 162 provided in the lens holding frame 110, and a stopper 164 inserted through the movable range restricting hole 162 to restrict the movable range of the lens holding frame 110. The stopper 164 is attached to the base member 120.

[0091] The movable range restricting holes 162 are an example of an opening. The movable range restricting holes 162 are provided at two locations on the flange portion 110B of the lens retaining frame 110. Each movable range restricting hole 162 is positioned symmetrically with respect to the optical axis of the shake correction lens 14.

[0092] The x-axis drive unit 180 consists of a voice coil motor and drives the lens holding frame 110 in the x-axis direction.

[0093] As shown in Figures 4 and 5, the voice coil motor constituting the x-axis drive unit 180 comprises a pair of yokes 200A and 200B, a pair of x-axis drive magnets 182A and 182B, and an x-axis drive coil 184.

[0094] The pair of yokes 200A and 200B are made of magnetic metal plates such as steel plates. The pair of yokes 200A and 200B are attached to the front and back of the base member 120 by screwing them with screws 202A and 202B. The yokes 200A and 200B attached to the base member 120 are arranged at a constant distance from each other in the direction of the optical axis z, and are also positioned perpendicular to the optical axis z.

[0095] A pair of x-axis drive magnets 182A and 182B are integrally attached to the corresponding yokes 200A and 200B. The pair of x-axis drive magnets 182A and 182B are positioned at predetermined locations on the base member 120 by attaching the yokes 200A and 200B to the base member 120. Specifically, they are positioned on the x-axis (the centers of the x-axis drive magnets 182A and 182B are located on the x-axis) and are positioned opposite each other with a certain distance between them in the direction of the optical axis z. The pair of x-axis drive magnets 182A and 182B are positioned midway between the two stoppers 164 in the direction perpendicular to the x-axis direction (y-axis direction).

[0096] The x-axis drive coil 184 is provided on the flange portion 110B of the lens holding frame 110. The x-axis drive coil 184 is positioned between a pair of x-axis drive magnets 182A and 182B. Furthermore, the x-axis drive coil 184 is positioned on a straight line parallel to the x-axis, passing through the center of the vibration correction lens 14.

[0097] The x-axis drive unit 180, configured as described above, moves the lens holding frame 110 in the x-axis direction by energizing the x-axis drive coil 184.

[0098] The y-axis drive unit 190 is composed of a voice coil motor and drives the lens holding frame 110 in the y-axis direction.

[0099] The voice coil motor constituting the y-axis drive unit 190 comprises a pair of yokes 200A and 200B, a pair of y-axis drive magnets 192A and 192B, and a y-axis drive coil 194.

[0100] The pair of yokes 200A and 200B are made of magnetic metal plates such as steel plates. The pair of yokes 200A and 200B are attached to the front and back of the base member 120 by screwing them with screws 202A and 202B. The yokes 200A and 200B attached to the base member 120 are arranged at a constant distance from each other in the direction of the optical axis z, and are also positioned perpendicular to the optical axis z.

[0101] A pair of y-axis drive magnets 192A and 192B are integrally attached to the corresponding yokes 200A and 200B. The pair of y-axis drive magnets 192A and 192B are positioned at predetermined locations on the base member 120 by attaching the yokes 200A and 200B to the base member 120. Specifically, they are positioned on the y-axis (the centers of the y-axis drive magnets 192A and 192B are located on the y-axis) and are positioned opposite each other with a certain distance between them in the direction of the optical axis z. The pair of y-axis drive magnets 192A and 192B are positioned midway between the two stoppers 164 in the direction perpendicular to the y-axis (x-axis direction).

[0102] The y-axis drive coil 194 is provided on the flange portion 110B of the lens holding frame 110. The y-axis drive coil 194 is positioned between a pair of y-axis drive magnets 192A and 192B. Furthermore, the y-axis drive coil 194 is positioned on a straight line parallel to the y-axis, passing through the center of the vibration correction lens 14.

[0103] The y-axis drive unit 190, configured as described above, moves the lens holding frame 110 in the y-axis direction by energizing the y-axis drive coil 194.

[0104] 《Position detection unit in the x-axis direction and position detection unit in the y-axis direction》 <x-axis position detection unit> As shown in Figures 4 and 7, the x-axis position detection unit 210 detects the position of the lens holding frame 110 in the x-axis direction. The position detection unit 210 includes a magnet (magnetic material) 212 for detecting the position in the x-axis direction and a Hall element 214 for detecting the position in the x-axis direction.

[0105] The position detection Hall element 214 is a magnetic sensor that detects the magnetic field formed by the position detection magnet 212 in the x-axis direction.

[0106] In this example, the position-detecting Hall element 214 is configured as a linear Hall IC (IC: Integrated Circuit) with two Hall elements built into a package, and has detection sensitivity to movement in the x-axis direction of the position-detecting magnet 212 in the x-axis direction.

[0107] The magnet 212 for detecting the position in the x-axis direction is provided on the flange portion 110B of the lens holding frame 110 (see Figure 4), and the position detection Hall element 214 is fixed to the base member 120 (see Figure 7).

[0108] Further details regarding the structure and method for fixing the position-detecting Hall element 214 to the base member 120 will be described later.

[0109] The x-axis position detection unit 210 detects the position of the position detection magnet 212 in the x-axis direction using the position detection Hall element 214, thereby detecting the position of the lens holding frame 110 in the x-axis direction (i.e., the position of the shake correction lens 14 in the x-axis direction).

[0110] <Y-axis position detection unit> The y-axis position detection unit 220 detects the position of the lens holding frame 110 in the y-axis direction and is configured similarly to the x-axis position detection unit 210.

[0111] Specifically, the y-axis position detection unit 220 includes a y-axis position detection magnet (magnetic material) 222 and a y-axis position detection Hall element 224.

[0112] The position detection Hall element 224 is a magnetic sensor that detects the magnetic field formed by the position detection magnet 222 in the y-axis direction, and has detection sensitivity to movement of the position detection magnet 222 in the y-axis direction.

[0113] The magnet 222 for detecting the position in the y-axis direction is provided on the flange portion 110B of the lens holding frame 110, and the position detection Hall element 224 is fixed to the base member 120.

[0114] The y-axis position detection unit 210 detects the y-axis position of the position detection magnet 222 using the position detection Hall element 224, thereby detecting the position of the lens holding frame 110 in the y-axis direction (i.e., the position of the shake correction lens 14 in the y-axis direction).

[0115] <Image Correction> The following describes the vibration correction method (drive control method for the optical vibration isolation device) using the optical vibration isolation device 100.

[0116] When the image stabilization function of the digital camera 1 is turned on, image stabilization is performed. When the image stabilization function is turned on, the amount of shake of the digital camera 1 is detected by the shake detection unit 70 shown in Figure 3, and the amount of shake correction is calculated by the image stabilization amount calculation unit 90 based on the detection result. Then, based on the calculation result by the image stabilization amount calculation unit 90, the movement of the image stabilization lens 14 is controlled by the image stabilization control unit 60, and the image stabilization is corrected. At this time, the movement of the image stabilization lens 14 is controlled with respect to a predetermined origin position and within a predetermined image stabilization control range.

[0117] When the power to the digital camera 1 is turned off, the image stabilization lens 14 loses its holding power and falls free. In this case, the image stabilization lens 14 is held in place by the stopper 164.

[0118] <Fixing structure for Hall element for position detection> As shown in Figure 7, the Hall element 214 for detecting position in the x-axis direction and the Hall element 224 for detecting position in the y-axis direction are packaged and mounted on the flexible printed circuit board 230.

[0119] This flexible printed circuit board 230 is fixed to the base member 120 by two sensor mounting members 240, and as a result, the position detection Hall elements 214 and 224 are fixed to the base member 120.

[0120] 《First Embodiment of Sensor Mounting Member》 Figure 8 is a perspective view showing a first embodiment of the sensor mounting member, and Figure 9 is a plan view of the sensor mounting member shown in Figure 8.

[0121] In this example, the sensor mounting member 240 is a molded product made of resin and is a separate component from the base member 120. While ABS resin can be used as the material for the sensor mounting member 240, it is not limited to this, and various other resins can be applied.

[0122] However, the resin used for the sensor mounting member 240 is preferably a resin with higher moldability compared to the resin used for the base member 120. This is because, as will be described later, the sensor mounting member 240 has a shape in which the ratio of overall length to cross-sectional area is larger than that of any part of the base member 120.

[0123] Furthermore, the base member 120 and the sensor mounting member 240 are manufactured from different materials, preferably the sensor mounting member 240 is made of a material with a lower elastic modulus than the base member 120, and more preferably the base member 120 is made of a material with higher rigidity than the sensor mounting member 240.

[0124] In this example, the base member 120 is made of glass fiber-reinforced PC resin containing glass fibers, and the sensor mounting member 240 is made of PC resin that does not contain glass fibers, thus satisfying the above material properties.

[0125] Furthermore, it is preferable that the base member 120 and the sensor mounting member 240 are manufactured from materials with the same coefficient of thermal expansion. The sensor mounting member 240 is fixed to the base member 120, and by manufacturing both from materials with the same coefficient of thermal expansion, the occurrence of dimensional changes (thermal stress) between them can be suppressed. However, the coefficients of thermal expansion of the two are not necessarily to be perfectly identical; if the dimensional change due to the difference in their coefficients of thermal expansion is sufficiently small compared to the detection error of the position detection Hall elements 214 and 224, or if it is small enough not to affect the position detection accuracy of the position detection Hall elements 214 and 224, then the difference in their coefficients of thermal expansion is acceptable.

[0126] As shown in Figures 8 and 9, the sensor mounting member 240 has a U-shaped outer form and a cantilevered elastic portion 242 extending toward the space in its center. A projection 242A is formed at the tip of the elastic portion 242, which biases the position detection Hall element with the elastic force generated in the elastic portion 242.

[0127] Furthermore, the sensor mounting member 240 has a first hole 245 and a second hole 246 for positioning, and also fastening holes 247 and 248 through which fasteners (male screws) are inserted.

[0128] Figure 10 is a plan view of the tip portion of the flexible printed circuit board, and Figure 11 is a plan view showing the state in which the sensor mounting member is placed on the tip portion of the flexible printed circuit board.

[0129] A Hall element 224 for detecting position in the y-axis direction is mounted on the tip of the flexible printed circuit board 230 shown in Figure 10.

[0130] The tip portion of the flexible printed circuit board 230 has a third hole 235 and a fourth hole 236, which correspond to the first hole 245 and the second hole 246 for positioning the sensor mounting member 240, respectively, and fastening holes 237 and 238, which correspond to the fastening holes 247 and 248 of the sensor mounting member 240, respectively.

[0131] The third hole 235, the fourth hole 236, and the fastening holes 237, 238 formed in the flexible printed circuit board 230 are larger than the first hole 245, the second hole 246, and the fastening holes 247, 248 formed in the sensor mounting member 240. This is to allow the flexible printed circuit board 230 to move slightly relative to the base member 120.

[0132] It goes without saying that the same third hole 235, fourth hole 236, and fastening holes 237, 238 as described above are also formed in the portion of the flexible printed circuit board 230 where the Hall element 214 for detecting position in the x-axis direction is mounted.

[0133] Method for fixing magnetic sensors Next, a magnetic sensor fixing method will be described, which involves fixing a flexible printed circuit board 230, on which a Hall element 214 for position detection in the x-axis direction and a Hall element 224 for position detection in the y-axis direction are mounted, to a base member 120 using two sensor mounting members 240, and then positioning and fixing the Hall elements 214 and 224 (magnetic sensors) for position detection.

[0134] Figure 12 shows how a flexible printed circuit board is placed on a base member.

[0135] As shown in Figures 11 and 12, the base member 120 has a first pin 135 and a second pin 136 integrally molded into it. The first positioning hole 245 and the second positioning hole 246 formed in the sensor mounting member 240, and the first pin 135 and the second pin 136 formed in the base member 120 form a position regulating section that allows for direct position regulating between the sensor mounting member 240 and the base member 120.

[0136] The flexible printed circuit board 230 is movably positioned on one side of the base member 120 (the side facing the lens holding frame 110), with third holes 235 and fourth holes 236 formed on the flexible printed circuit board 230 being loosely inserted into first pins 135 and second pins 136 of the base member 120, respectively.

[0137] Next, the first hole 245 and the second hole 246 of the sensor mounting member 240 are inserted through the first pin 135 and the second pin 136 of the base member 120, respectively, to position the sensor mounting member 240 on the base member 120.

[0138] Then, the sensor mounting member 240 is pushed toward the flexible printed circuit board 230.

[0139] Figure 13 is a cross-sectional view along the line 13-13 in Figure 11.

[0140] As shown in Figure 13, the elastic portion 242 of the sensor mounting member 240 has a tapered lower surface at the tip of the protruding portion 242A. By pushing the sensor mounting member 240 toward the flexible printed circuit board 230, the position detection Hall element 224 is pressed to the right in Figure 13 and moved together with the flexible printed circuit board 230.

[0141] At this time, one side of the package of the position-detecting Hall element 224 abuts against the two protrusions 134A and 134B of the positioning portion 134 of the base member 120, and the other side of the package abuts against the protrusion 242A at the tip of the elastic portion 242 of the sensor mounting member 240, and is pressed by the elastic force generated in the elastic portion 242.

[0142] Furthermore, as shown in Figures 12 and 13, the positioning portion 134 has a relief portion 134C formed therein to avoid interference between the flexible printed circuit board 230 and the positioning portion 134 when the package of the position detection Hall element 224 comes into contact with the positioning portion 134 (two protrusions 134A and 134B).

[0143] The elastic portion 242 formed on the sensor mounting member 240 has a shape in which the ratio of its total length to its cross-sectional area is large.

[0144] When the elastic part 242 is used as a spring as described above, a shape with a large ratio of total length to cross-sectional area is advantageous in terms of spring characteristics. More specifically, the advantages of the spring characteristics include a larger amount of spring displacement and less change in load due to displacement errors.

[0145] Furthermore, the elastic portion 242 formed on the sensor mounting member 240 has a shape in which the ratio of its total length to its cross-sectional area is larger than that of any other part of the base member 120 (for example, the fixed-side spring attachment portion 130, the first pin 135, the second pin 136, etc.).

[0146] One side of the package of the position-detecting Hall element 224 (the side that contacts the two protrusions 134A and 134B of the positioning portion 134) serves as a reference plane perpendicular to the y-axis direction, which is the detection direction of the position-detecting Hall element 224. This reference plane contacts the two protrusions 134A and 134B of the positioning portion 134, which is integrally molded with the base member 120, thereby allowing the position-detecting Hall element 224 to be accurately positioned on the base member 120.

[0147] As a result, when the lens holding frame 110 (position detection magnet 222) moves left and right relative to the base member 120 in Figure 13, the left and right position of the position detection magnet 222 can be detected with high accuracy.

[0148] Similarly, the Hall element 214 for detecting position in the x-axis direction can also be accurately positioned on the base member 120 using the positioning portion 132 formed on the sensor mounting member 240 and the base member 120.

[0149] Furthermore, by integrally providing the positioning sections 132 and 134 on the base member 120, the position detection Hall elements 214 and 224 can be positioned with high precision relative to the base member 120, which serves as a reference for displacing the vibration correction lens 14.

[0150] On the other hand, by using two sensor mounting members 240, which are separate parts from the base member 120, to bring the position-detecting Hall elements 214 and 224 into contact with the positioning parts 132 and 134, when biasing the position-detecting Hall elements 214 and 224 using the spring force of the elastic part 242 of the sensor mounting member 240, the sensor mounting member 240, which has a shape with a large ratio of total length to cross-sectional area, can be constructed as a separate part without being bound by processing constraints such as the molding conditions of the base member 120. As a result, it becomes possible to form an elastic part 242 that exhibits excellent spring characteristics with a long effective spring length, enabling stable positioning of the position-detecting Hall elements 214 and 224.

[0151] Figure 14 is a plan view of the base member showing a flexible printed circuit board placed on the base member and two position-detecting Hall elements positioned by two sensor mounting members. In the state shown in Figure 14, the sensor mounting member 240 is not yet fixed to the base member 120.

[0152] Figure 15 is a perspective view showing how the sensor mounting member is fixed to the base member by fasteners, and Figures 16(A) and (B) are a plan view and a side view of the sensor mounting member, respectively.

[0153] As shown in Figures 15 and 16, the two male screws 249A and 249B, which are fasteners, are screwed into the screw holes 129A and 129B of the base member 120 via the fastening holes 247 and 248 of the sensor mounting member 240, and the sensor mounting member 240 is fixed to the base member 120 with the flexible printed circuit board 230 in between.

[0154] As a result, the flexible printed circuit board 230 (the Hall element for position detection mounted on the flexible printed circuit board 230) is also fixed to the base member 120. Note that the fastener used to fix the sensor mounting member 240 to the base member 120 is not limited to a combination of male screws and screw holes. Also, the flexible printed circuit board 230 is not shown in Figure 15.

[0155] While metal screws made of iron or stainless steel are commonly used as fasteners that offer high precision, high strength, and ease of assembly, the male screws 249A and 249B utilize brass screws, a non-magnetic metal.

[0156] Using magnetic materials as fasteners may cause position detection errors by disrupting the magnetic field of the magnet, or hinder the movement of the lens holding frame due to the influence of the magnet's magnetic force. Therefore, it is preferable to use non-magnetic materials such as non-magnetic metals or ceramics as fasteners, and considering ease of assembly, using screws made of non-magnetic metals such as brass is most preferable.

[0157] The two sensor mounting members 240 shown in Figure 7 differ from those in Figure 14 in that they are fixed to the base member 120 by two male screws 249A and 249B, respectively.

[0158] As shown in Figure 7, the sensor mounting member 240 also serves as a fixing member for securing the flexible printed circuit board 230 to the base member 120.

[0159] Furthermore, since the position-detecting Hall elements 214 and 224 are also fixed in close contact with the surface of the base member 120, the sensor mounting member 240 also serves as a position regulating member that restricts the position of the position-detecting Hall elements 214 and 224 (magnetic sensors) in the optical axis direction.

[0160] 《Second Embodiment of Sensor Mounting Member》 Figure 17 is a perspective view showing a second embodiment of the sensor mounting member, and Figure 18 is a plan view of the sensor mounting member shown in Figure 17. In Figures 17 and 18, parts common to the sensor mounting member 240 of the first embodiment shown in Figures 8 and 9 are denoted by the same reference numerals, and their detailed descriptions are omitted.

[0161] The sensor mounting member 250 of the second embodiment differs from the sensor mounting member 240 of the first embodiment in that an arch-shaped connecting portion 252 is integrally formed with it.

[0162] The connecting portion 252 connects the tips of a pair of mounting portions of the sensor mounting member 240 of the first embodiment, which has a U-shaped outer form, and the sensor mounting member 250 as a whole has a frame-like shape with an elastic portion 242 and an opening in the center.

[0163] The sensor mounting member 250 of the second embodiment has increased rigidity due to the connecting portion 252 compared to the sensor mounting member 240 of the first embodiment. As a result, for example, when positioning the Hall element for position detection, the sensor mounting member 250 is pushed toward the flexible printed circuit board 230, but in this case only the elastic portion 242 deforms, and other parts do not deform.

[0164] Furthermore, the connecting portion 252 is formed in an arch shape, thereby avoiding interference with the positioning portion 134 formed on the base member 120.

[0165] 《Third Embodiment of Sensor Mounting Member》 Figure 19 is a plan view showing a third embodiment of the sensor mounting member. In Figure 19, parts common to the sensor mounting member 240 of the first embodiment shown in Figures 8 and 9 are denoted by the same reference numerals, and their detailed descriptions are omitted.

[0166] In the third embodiment, the shape of the elastic portion 262 formed on the sensor mounting member 260 differs from the shape of the elastic portion 242 formed on the sensor mounting member 240 of the first embodiment.

[0167] The elastic portion 262 of the sensor mounting member 260 is bent in a hairpin shape, and its total length is longer than the total length of the elastic portion 242 formed on the sensor mounting member 240.

[0168] As a result, the elastic part 262, which functions as a spring pressing the position-detecting Hall element 224, can have a longer effective spring length. This allows for less change in load with respect to displacement errors, and also reduces internal stress, resulting in less load reduction due to "sagging," thus exhibiting excellent spring characteristics and enabling more stable positioning of the position-detecting Hall element 224.

[0169] 《Fourth Embodiment of Sensor Mounting Member》 Figure 20 is a plan view showing a fourth embodiment of the sensor mounting member. In Figure 20, parts common to the sensor mounting member 240 of the first embodiment shown in Figures 8 and 9 are denoted by the same reference numerals, and their detailed descriptions are omitted.

[0170] The sensor mounting member 270 of the fourth embodiment, like the sensor mounting member 260 of the third embodiment shown in Figure 19, has a different shape for the elastic portion 272 formed on the sensor mounting member 270 compared to the elastic portion 242 formed on the sensor mounting member 240 of the first embodiment.

[0171] The elastic portion 272 of the sensor mounting member 270 extends from a central member connecting a pair of mounting portions of the sensor mounting member 270 and is bent in a hairpin shape. Furthermore, the total length of the elastic portion 272 is longer than the total length of the elastic portion 262 formed on the sensor mounting member 260 of the third embodiment.

[0172] As a result, the elastic part 272, which functions as a spring to press the position-detecting Hall element 224, exhibits excellent spring characteristics with a long effective spring length, enabling more stable positioning of the position-detecting Hall element 224.

[0173] <Other embodiments of the position detection unit> Figure 21 shows another embodiment of the position detection unit for detecting the position of the lens holding frame.

[0174] The position detection unit shown in Figure 21 comprises a position detection magnet 211 and a position detection Hall element 226.

[0175] The position detection magnet 211 is a two-pole magnet having a magnetized portion with two poles. This position detection magnet 211 is positioned on the lens holding frame 110.

[0176] The position detection Hall element 226 differs from the position detection Hall elements 214 and 224, which are configured as linear Hall ICs with two Hall elements integrated into a package, in that it is configured as a linear Hall IC with one Hall element integrated into the package.

[0177] The position-detecting Hall element 226 works as follows: When the position-detecting magnet 211 moves left or right on Figure 21 from the reference position shown in Figure 21, the output voltage increases in proportion to the strength of the north pole of the position-detecting magnet 211 as it approaches, and decreases in proportion to the strength of the south pole as it approaches.

[0178] As a result, the position detection unit shown in Figure 21 is sensitive to the left-right movement of the position detection magnet 211 on Figure 21, and can detect the movement position of the lens holding frame 110.

[0179] [others] In this embodiment, a Hall element was described as a magnetic sensor used to detect changes in the magnetic field of a magnetic material. However, the invention is not limited to this, and for example, an MR (Magneto Resistive) sensor can also be applied.

[0180] The sensor mounting component in this example is a molded resin product, but it is not limited to this; it may also be made from processed non-magnetic metals or ceramics.

[0181] In this embodiment, we have described a case where the base member and the sensor mounting member are made of different materials, but this is not the only case. Even if the materials are the same, it is acceptable as long as the sensor mounting member is made of a separate component. For example, if the base member and the sensor mounting member are injection molded products of PC (polycarbonate) containing 30% glass fiber, and the mold for molding the base member and the mold for molding the sensor mounting member are different, then because the mold for the sensor mounting member is smaller, the injection pressure from the gate can reach it more easily, and molding conditions such as temperature control can be more easily controlled. As a result, relatively fine and complex structures can be created with high precision compared to a large mold like that for the base member. For example, in the case of a spring, a thin and long spring can be constructed on a small part, resulting in a spring that is highly resistant to stress and "sagging".

[0182] Even in structures other than springs, a stable contact force can be achieved by ensuring that the shape of the structural part that applies the contact force is not subject to the processing constraints of the large base member.

[0183] In another example, even in machining, a smaller machining size results in a smaller range of motion for the cutting tool, allowing for the selection of a machining center more suitable for micro-machining (a machining center with a smaller cutting tool travel distance). Thus, even with the same material, by having the sensor mounting component composed of a separate component, relatively fine part shapes can be created with high precision without being constrained by the machining and molding conditions of the base component, and the contact force applied to the positioning part can be stably applied both initially and over time.

[0184] Furthermore, the sensor mounting member only needs to have a pressing portion that brings the magnetic sensor into contact with the positioning portion of the base member.

[0185] The substrate on which the magnetic sensor is mounted is not limited to a flexible printed circuit board; a non-flexible printed circuit board may also be used.

[0186] Furthermore, although the above embodiment described a digital camera equipped with an optical image stabilization device, the application of the optical image stabilization device to optical devices is not limited to digital cameras but can also be applied to other optical devices. Other optical devices include, for example, various imaging devices such as so-called silver halide cameras, television cameras, and video cameras, as well as lens devices used in imaging devices.

[0187] Furthermore, it goes without saying that the present invention is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention. [Explanation of Symbols]

[0188] 1 Digital camera 10 Imaging optical system 12 Focus Lens 12A Focus lens drive unit 14 Image stabilization lens 16 aperture 16A Aperture drive unit 20 Image Sensors 20A Image Sensor Drive Unit 21 Magnet for position detection 22 Analog signal processing unit 24 Digital signal processing unit 30 Display section 32 Storage section 34 Control section 40 Angular velocity detection unit 40A Yaw direction angular velocity detection unit 40B Pitch direction angular velocity detection unit 50 Camera Microcontroller 52 Focus Control Unit 54 Exposure setting section 56 Image Sensor Drive Control Unit 58 Aperture control unit 60. Vibration Correction Control Unit 62 Display Control Unit 64 Memory Control Unit 70. Vibration detection unit 90. Shake Correction Amount Calculation Unit 100 Optical Vibration Isolator 110 Lens holding frame 110A Lens holder 110B Flange section 112 Movable side spring attachment part 114 Guide section 114A Guide groove 116 Movable side ball housing 120 Base member 120A Telescope Tube 120B opening 124 balls 126 Springs 128 Fixed side ball housing 129A, 129B Screw holes 130 Fixed side spring attachment part 132, 134 Positioning section 134A, 134B protrusion 134C Escape Department 135 Pin 1 136 Pin 2 140 RPM limiting section 142 Guide axis 144 Swivel base member 146 brackets 146A base 146B Arm section 148 Pivoting axis 150 Axis base member 160 Movable range restricting part 162 Range of motion restricting holes 164 Stopper 180 x-axis drive unit 182A, 182B x-axis drive magnets 184 x-axis drive coil 190 y-axis drive unit 192A, 192B Magnets for y-axis drive 194 Y-axis drive coil 200A, 200B York 202A, 202B screws 210, 220 Position detection unit 211, 212, 222 Magnets for position detection 214 Hall element for position detection 224, 226 Hall elements for position detection 230 Flexible Printed Circuit Boards 235 Hole 3 236 Hole 4 237, 238 Fastening holes 240, 250, 260, 270 Sensor mounting components 242, 262, 272 Elastic part 242A Protrusion 245 Hole 1 246 Hole 2 247, 248 Fastening holes 249A, 249B Male screw 252 Connecting part

Claims

1. Base member and A lens holding frame is configured to be movable along a plane perpendicular to the optical axis relative to the base member, A magnetic material that moves integrally with the lens holding frame and generates a magnetic field, A magnetic sensor that detects changes in the magnetic field corresponding to the movement of the lens holding frame, A sensor mounting member is provided, which is configured such that only the elastic part deforms, and other parts do not deform. The base member has a positioning portion, The sensor mounting member positions the magnetic sensor by bringing it into contact with the positioning portion due to the deformation of the elastic portion. Optical vibration isolation device.

2. The magnetic sensor is mounted on a printed circuit board. The printed circuit board is fixed to the base member at a position between the lens holding frame and the base member. The optical vibration isolation device according to claim 1.

3. The positioning portion has a relief portion to avoid interference with the printed circuit board when the magnetic sensor contacts the positioning portion. The optical vibration isolation device according to claim 2.

4. The aforementioned printed circuit board is a flexible printed circuit board. The optical vibration isolation device according to claim 2 or 3.

5. The base member has a first position restricting portion that restricts the position of the sensor mounting member relative to the base member, The sensor mounting member has a second position restricting portion whose position relative to the base member is restricted by the first position restricting portion. The optical vibration isolation device according to any one of claims 1 to 4.

6. The base member has a first pin and a second pin as the first position regulating portion. The sensor mounting member has a first hole and a second hole formed as the second position regulating portion. The sensor mounting member is positioned on the base member by having the first hole and the second hole inserted through the first pin and the second pin, respectively. The optical vibration isolation device according to claim 5.

7. The sensor mounting member has fastening holes through which fasteners are inserted. The sensor mounting member is inserted through the fastening hole and fixed to the base member via a fastener that is fixed to the base member. An optical vibration isolation device according to any one of claims 1 to 6.

8. The sensor mounting member also serves as a position regulating member that restricts the position of the magnetic sensor in the optical axis direction. The optical vibration isolation device according to any one of claims 1 to 7.

9. The sensor mounting member also serves as a fixing member for fixing the printed circuit board to the base member. The optical vibration isolation device according to any one of claims 2 to 4.

10. The sensor mounting member has an elastic portion, and the elastic force generated in the elastic portion biases the magnetic sensor and brings it into contact with the positioning portion. The optical vibration isolation device according to any one of claims 1 to 9.

11. The base member and the sensor mounting member are each molded products made of resin. The optical vibration isolation device according to any one of claims 1 to 10.

12. The sensor mounting member is a molded product made of a resin with higher molding fluidity than the base member. The optical vibration isolation device according to claim 11.

13. The base member and the sensor mounting member are made of different materials. The optical vibration isolation device according to any one of claims 1 to 12.

14. The sensor mounting member is made of a material with a lower elastic modulus than the base member. The optical vibration isolation device according to any one of claims 1 to 13.

15. The base member and the sensor mounting member are manufactured from materials with the same coefficient of thermal expansion. The optical vibration isolation device according to any one of claims 1 to 14.

16. The base member is made of a material with higher rigidity than the sensor mounting member. The optical vibration isolation device according to any one of claims 1 to 15.

17. The magnetic material is a magnet provided in the lens holding frame. An optical vibration isolation device according to any one of claims 1 to 16.

18. An optical apparatus comprising an optical vibration isolation device according to any one of claims 1 to 17.

19. A method for fixing a magnetic sensor in an optical vibration isolation device, comprising: a base member having a positioning portion; a lens holding frame configured to be movable along a plane perpendicular to the optical axis relative to the base member; a magnetic material that moves integrally with the lens holding frame and generates a magnetic field; a magnetic sensor that detects changes in the magnetic field corresponding to the movement of the lens holding frame; a printed circuit board on which the magnetic sensor is mounted; and a sensor mounting member configured so that only the elastic part deforms and other parts do not deform, wherein the lens holding frame is moved in a plane perpendicular to the optical axis, The printed circuit board is placed on the surface of the base member facing the lens holding frame, The elastic portion of the sensor mounting member is deformed, and the elastic force generated in the elastic portion biases the magnetic sensor mounted on the printed circuit board. The magnetic sensor is pressed in the direction of the positioning portion by the elastic force, moved together with the printed circuit board, and positioned by bringing the magnetic sensor into contact with the positioning portion using the sensor mounting member. Method for fixing a magnetic sensor.

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