Optical element driving device, camera module, and camera mounting device

Abstract

Provided are a blade driving device capable of rotating a movable body in a stable attitude with respect to a fixed body, a camera module, and a camera-equipped device. This blade driving device can adjust the amount of light incident on an optical element, and comprises: a fixed body that has a cylindrical body part, and an opening formation part disposed on the light reception side in the optical axis direction of the body part and forming an opening; a movable body that is held in a state of being magnetically attracted to the opening formation part and is rotatable with respect to the fixed body; a driving part that rotates the movable body; a diaphragm blade that opens and closes the opening in conjunction with the rotation of the movable body; a plurality of first balls that are interposed between the opening formation part and the movable body; and a plurality of second balls that are interposed between the body part and the movable body.

Description

Blade drive device, camera module, and camera-mounted device

[0001] The present invention relates to a blade drive device, a camera module, and a camera-mounted device.

[0002] Generally, camera-equipped devices such as smartphones and drones are equipped with a small camera module (optical device). Drones are unmanned aerial vehicles that can be flown by remote control or automatic control, and some are called multicopters.

[0003] The camera module uses an optical element driving device that drives an optical element such as a lens. The optical element driving device has, for example, an autofocus function (hereinafter referred to as the "AF function") that moves an optical element (e.g., a lens) in the optical axis direction to automatically focus when photographing a subject, and an image stabilization function (hereinafter referred to as the "OIS function") that optically corrects shake (vibration) that occurs during photography to reduce image distortion.

[0004] Furthermore, in recent years, camera modules have been developed that include, in addition to an optical element driving device, a blade driving device that can adjust the amount of light incident on an optical element (see, for example, Patent Document 1). The blade driving device includes, for example, a fixed body, a movable body (rotating body) that can rotate relative to the fixed body, diaphragm blades that move to open and close an aperture in conjunction with the rotation of the movable body, and a driving unit that drives the movable body.

[0005] Japanese Patent Application Laid-Open No. 2020-122915

[0006] The above-described blade drive device requires a support structure for rotating the movable body relative to the fixed body in a stable position.

[0007] An object of the present invention is to provide a blade drive device, a camera module, and a camera-mounted device that can rotate a movable body relative to a fixed body in a stable position.

[0008] The blade drive device of the present invention is a blade drive device capable of adjusting the amount of light incident on an optical element, and comprises: a fixed body having a cylindrical main body and an opening forming portion that is arranged on the light receiving side in the optical axis direction of the main body and forms an opening; a movable body that is held in a state where it is magnetically attracted to the opening forming portion and is rotatable relative to the fixed body; a drive portion that rotates the movable body; aperture blades that open and close the opening in conjunction with the rotation of the movable body; a plurality of first balls interposed between the opening forming portion and the movable body; and a plurality of second balls interposed between the main body and the movable body.

[0009] A camera module according to the present invention includes the blade drive device described above.

[0010] A camera-equipped device according to the present invention is an information device or a transport device, and includes the camera module described above.

[0011] According to the present invention, the movable body can be rotated with respect to the fixed body in a stable position, and reliability is significantly improved.

[0012] FIGS. 1A and 1B are diagrams showing a smartphone equipped with a camera module according to an embodiment of the present invention. FIG. 2 is an external perspective view of the camera module. FIG. 3 is an exploded perspective view of the camera module. FIG. 4 is an exploded perspective view of an optical element driving device. FIG. 5 is an exploded perspective view of an OIS movable section (AF unit). FIG. 6 is a diagram showing input / output terminals of a circuit board section. FIGS. 7A and 7B are plan views showing the configuration of an upper elastic support section. FIGS. 8A and 8B are bottom views showing the configuration of a lower elastic support section. FIGS. 9A and 9B are diagrams showing an example of an insulating structure between adjacent upper spring elements. FIGS. 10 is an exploded perspective view of a blade driving device. FIG. 11 is a cross-sectional view of the blade driving device. FIG. 12 is a plan view of the blade driving device as seen from the light-receiving side in the optical axis direction. FIGS. 13A and 13B are diagrams showing an automobile as a camera-mounted device equipped with an in-vehicle camera module.

[0013] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0014] 1A and 1B are diagrams showing a smartphone M (an example of a camera-equipped device) equipped with a camera module A according to an embodiment of the present invention. Fig. 1A is a front view of the smartphone M, and Fig. 1B is a rear view of the smartphone M.

[0015] The smartphone M has a dual camera system consisting of two rear cameras OC1 and OC2. In this embodiment, the camera module A is applied to the rear cameras OC1 and OC2.

[0016] <Camera Module> Fig. 2 is a perspective view of the appearance of the camera module A. Fig. 3 is an exploded perspective view of the camera module A. In this embodiment, a Cartesian coordinate system (X, Y, Z) is used for explanation. The same Cartesian coordinate system (X, Y, Z) is also used in the drawings described below.

[0017] For example, when actually taking a photograph with a smartphone M, the camera module A is mounted so that the X-axis direction is the up-down direction (or left-right direction), the Y-axis direction is the left-right direction (or up-down direction), and the Z-axis direction is the front-to-back direction. That is, the Z-axis direction is the optical axis direction, and the upper side (+Z side) in the figure is the light-receiving side in the optical axis direction, and the lower side (-Z side) is the image-forming side in the optical axis direction. Furthermore, the X-axis and Y-axis directions orthogonal to the Z axis are referred to as "directions orthogonal to the optical axis," and the XY plane is referred to as the "plane orthogonal to the optical axis." Note that the optical axis direction may also be referred to as the optical path direction or the focus direction (the direction in which the focus is adjusted) depending on the type of optical element.

[0018] The camera module A has an AF function that can automatically adjust the focus when photographing a subject. The camera module A also has an OIS function that optically corrects shake (vibration) that occurs during photography, enabling blur-free images to be taken.

[0019] As shown in FIG. 2, the camera module A includes an optical element driving device 1 that realizes the AF function and the OIS function, a lens unit 2 in which a lens is housed in a lens barrel, an imaging unit 3 that captures the subject image formed by the lens unit 2, and a blade driving device 4 that adjusts the amount of light incident on the lens.

[0020] The optical element driving device 1 of this embodiment is designed with consideration for being mounted on the above-mentioned camera module A, etc., and is configured so that its length in the Z-axis direction is shorter than its lengths in the X-axis direction and Y-axis direction, i.e., its height along the Z-axis direction is reduced.

[0021] The imaging unit 3 is disposed on the imaging side in the Z-axis direction of the optical element driving device 1. The imaging unit 3 has, for example, an image sensor board 301, an imaging element 302 mounted on the image sensor board 301, and a module control unit 303.

[0022] The image sensor board 301 is, for example, a flexible printed circuit board (FPC) and is configured to be able to transmit an imaging signal obtained by the imaging element 302 to a control device (not shown) of the smartphone M. The control device of the smartphone M includes an image processing unit (not shown) that processes the received imaging signal.

[0023] The image sensor 302 is configured by, for example, a charge-coupled device (CCD) image sensor, a complementary metal oxide semiconductor (CMOS) image sensor, or the like, and captures the subject image formed by the lens unit 2 .

[0024] The module control unit 303 is configured by, for example, a control IC, and controls the driving of the optical element driving device 1 and the blade driving device 4. The optical element driving device 1 is mounted on the image sensor substrate 301 and is mechanically and electrically connected thereto. The module control unit 303 may be provided on the image sensor substrate 301, or may be provided in a camera-equipped device (in this embodiment, a smartphone M) on which the camera module A is mounted.

[0025] The lens unit 2 is housed in and fixed in the optical element driving device 1. The blade driving device 4 is fixed to the lens unit 2 or a movable part (lens holder 11) of the optical element driving device 1, and is movable in the optical axis direction together with the lens unit 2 and the movable part of the optical element driving device 1. Driving power and control signals (clock signal and data signal) are supplied to the blade driving device 4 via the optical element driving device 1.

[0026] <Optical element driving device 1> Fig. 4 is an exploded perspective view of the optical element driving device 1. Fig. 5 is an exploded perspective view of the OIS movable part 10 as seen from the light receiving side in the optical axis direction. Note that Fig. 4 shows a state in which the cover 24 has been removed. The cover 24 is omitted from Fig. 4.

[0027] As shown in FIGS. 4 and 5, the optical element driving device 1 includes an OIS movable section 10, an OIS fixed section 20, an OIS driving section 30, an OIS support section 40, a cover 24, and the like.

[0028] The cover 24 is an exterior body of the optical element driving device 1 and covers the outside of the driving device main body (reference numeral omitted). The cover 24 is a covered square cylinder that is approximately rectangular in plan view from the Z-axis direction. The planar shape of the cover 24 is, for example, a square. In other words, the optical element driving device 1 has a rectangular shape that extends in the X-axis and Y-axis directions when viewed from the Z-axis direction. In the following description, "planar view" means a planar view from the Z-axis direction.

[0029] The cover 24 has a substantially circular opening 241 on its surface (top surface) on the light-receiving side in the optical axis direction. The lens unit 2 (see FIG. 3 ) faces the outside through the opening 241 of the cover 24. The lens unit 2 may be arranged to protrude further toward the light-receiving side in the Z-axis direction than the opening surface of the cover 24. The cover 24 is fixed to the base 21 of the optical element driving device 1, for example, by adhesive. The cover 24 may be formed, for example, from a magnetic material, and may have a shielding function that blocks electromagnetic waves from entering from the outside or radiating to the outside.

[0030] The OIS movable unit 10 is a part that receives a driving force from the OIS drive unit 30 and oscillates in a plane perpendicular to the optical axis during shake correction. The OIS fixed unit 20 is a part that supports the OIS movable unit 10. The OIS fixed unit 20 is disposed, for example, spaced apart from the OIS movable unit 10 on the imaging side in the optical axis direction.

[0031] OIS driving unit 30 is composed of OIS coils 32A to 32D arranged in OIS fixed unit 20, and driving magnets 31A to 31D (OIS magnets) arranged in OIS movable unit 10. In other words, a moving magnet type voice coil motor is applied to OIS driving unit 30. Note that OIS driving unit 30 may also be composed of a moving coil type voice coil motor.

[0032] The OIS support section 40 is a section that connects the OIS movable section 10 and the OIS fixed section 20. The OIS support section 40 supports the OIS movable section 10 relative to the OIS fixed section 20 so that the OIS movable section 10 can swing within a plane perpendicular to the optical axis.

[0033] A guaranteed stroke, which indicates the degree to which shake correction can be performed appropriately, is defined for optical element driving device 1. That is, the shapes, sizes, strengths, etc. of the constituent members of OIS movable unit 10, OIS fixed unit 20, OIS driving unit 30, and OIS support unit 40 are set so as to realize the guaranteed stroke.

[0034] The OIS movable part 10 is composed of an AF unit including, for example, a lens holder 11, a magnet holder 12, an AF coil 13, drive magnets 31A to 31D, an upper elastic support part 15, a lower elastic support part 16, and an AF drive circuit board part 50.

[0035] The lens holder 11 is a movable body that holds the lens unit 2 (see FIG. 3 ) and moves in the Z-axis direction when focusing. The lens holder 11 is disposed radially inwardly of and spaced apart from the magnet holder 12, and is connected to the magnet holder 12 by an upper elastic support portion 15 and a lower elastic support portion 16.

[0036] The lens holder 11 is formed of, for example, polyarylate (PAR), a PAR alloy which is a mixture of multiple resin materials including PAR, a liquid crystal polymer, or the like.

[0037] The lens holder 11 has a cylindrical lens housing portion 111. The lens portion 2 (see FIG. 3) is fixed to the inner peripheral surface of the lens housing portion 111 by, for example, adhesive. In addition, an AF coil 13 is attached to the outer peripheral surface of the lens holder 11.

[0038] An upper elastic support portion 15 is fixed to the upper surface of the lens holder 11 (the upper end surface of the lens housing portion 111). The upper elastic support portion 15 is positioned by, for example, a positioning boss (reference number omitted) provided on the upper surface of the lens holder 11.

[0039] A lower elastic support part 16 is fixed to the lower surface of the lens holder 11. The lower elastic support part 16 is positioned by, for example, a positioning boss (reference numeral omitted) provided on the lower surface of the lens holder 11. The lens holder 11 also has, on its lower surface, a tether part 112 (see FIG. 8B ) to which an end of the AF coil 13 is connected.

[0040] The magnet holder 12 is a fixed body that supports the lens holder 11 movably in the Z-axis direction via an upper elastic support portion 15 and a lower elastic support portion 16. The magnet holder 12 has, for example, a substantially rectangular cylindrical shape in a plan view from the Z-axis direction. The lens holder 11 is placed in an opening 121 of the magnet holder 12.

[0041] The magnet holder 12 is formed from a molding material such as polyarylate (PAR), a PAR alloy (for example, PAR / PC) made by mixing a plurality of resin materials including PAR, or a liquid crystal polymer.

[0042] The magnet holder 12 has a magnet accommodating section 123 to which the drive magnets 31A to 31D are fixed inside the connecting sections (the four corners of the magnet holder 12) of the four side wall bodies 122. The magnet accommodating section 123 is provided with, for example, an opening (reference number omitted) that communicates with the outside, so that an adhesive can be injected onto the contact surfaces between the magnet accommodating section 123 and the drive magnets 31A to 31D.

[0043] Magnet holder 12 has a wire insertion portion 124 that is recessed in an arc shape radially inward, outside the connecting portion of side wall body 122. Suspension wires 41 to 48 are arranged in wire insertion portion 124. Providing wire insertion portion 124 makes it possible to avoid interference between suspension wires 41 to 48 and magnet holder 12 when OIS movable part 10 swings.

[0044] The magnet holder 12 has a board fixing portion 125 for fixing the AF drive circuit board unit 50 on the outer peripheral surface of the side wall body 122. Although not shown in the figure, the board fixing portion 125 has a recess formed therein that can accommodate the driver IC 52 (drive control unit) and capacitor 53 of the AF drive circuit board unit 50.

[0045] The upper elastic support part 15 is fixed to the upper surface of the side wall body 122. The lower elastic support part 16 is fixed to the lower surface of the side wall body 122. The peripheral edge of the wire insertion part 124 is formed so as to be inclined downward from the mounting surface of the upper elastic support part 15, so that a gap is formed when the upper elastic support part 15 is mounted.

[0046] The AF coil 13 is an air-core coil that is energized during autofocusing. The AF coil 13 is wound around the coil winding portion of the lens holder 11 (the outer peripheral surface of the lens housing portion 111). The AF coil 13, together with the drive magnets 31A to 31D, constitutes a voice coil motor, and functions as an AF drive portion. Both ends of the AF coil 13 are respectively wound around the winding portion 112 of the lens holder 11. Electricity is supplied to the AF coil 13, for example, via the lower elastic support portion 16. The current flowing through the AF coil 13 is controlled, for example, by a driver IC 52 mounted on the AF drive circuit board portion 50.

[0047] The drive magnets 31A to 31D are fixed to the magnet holder 12 by, for example, adhesive. In this embodiment, the drive magnets 31A to 31D have a generally isosceles trapezoidal shape in a plan view. This allows the space at the corners of the magnet holder 12 to be used effectively.

[0048] The drive magnets 31A to 31D are arranged to be spaced apart in the radial direction from the AF coil 13 and spaced apart in the optical axis direction from the OIS coils 32A to 32D. The drive magnets 31A to 31D are magnetized so as to form a magnetic field that crosses the AF coil 13 in the radial direction and crosses the OIS coils 32A to 32D in the optical axis direction.

[0049] Drive magnets 31A to 31D, together with AF coil 13, constitute a voice coil motor, which functions as an AF drive unit. Drive magnets 31A to 31D, together with OIS coils 32A to 32D, constitute a voice coil motor, which functions as an OIS drive unit 30. That is, in this embodiment, drive magnets 31A to 31D serve as both AF magnets and OIS magnets.

[0050] The upper elastic support part 15 elastically supports the lens holder 11 on the light-receiving side in the optical axis direction relative to the magnet holder 12. The upper elastic support part 15 is formed of, for example, titanium copper, nickel copper, stainless steel, etc. The upper elastic support part 15 has a rectangular shape as a whole in a plan view, i.e., the same shape as the magnet holder 12.

[0051] The upper elastic support portion 15 has six upper spring elements, namely, a first upper spring element 151 to a sixth upper spring element 156. Hereinafter, when the first upper spring element 151 to the sixth upper spring element 156 are not distinguished from one another, they will be referred to as "upper spring elements 151 to 156." The upper spring elements 151 to 156 are made of leaf springs and are arranged on the magnet holder 12 so as not to come into contact with one another. The upper spring elements 151 to 156 are formed, for example, by etching a single piece of sheet metal. The detailed configuration of the upper elastic support portion 15 will be described later.

[0052] The lower elastic support part 16 elastically supports the lens holder 11 on the imaging side in the optical axis direction relative to the magnet holder 12. The lower elastic support part 16 is formed of, for example, titanium copper, nickel copper, stainless steel, etc. The lower elastic support part 16 has a rectangular shape as a whole in a plan view, i.e., the same shape as the magnet holder 12.

[0053] The lower elastic support portion 16 has two lower spring elements, a first lower spring element 161 and a second lower spring element 162. Hereinafter, when the first lower spring element 161 and the second lower spring element 162 are not distinguished from each other, they will be referred to as "lower spring elements 161, 162." The lower spring elements 161, 162 are made of leaf springs. The lower spring elements 161, 162 are formed, for example, by etching a single piece of sheet metal. The detailed configuration of the lower elastic support portion 16 will be described later.

[0054] The AF drive circuit board unit 50 includes a flexible printed circuit board 51 (hereinafter referred to as “FPC 51”), a driver IC 52, and a capacitor 53. The AF drive circuit board unit 50 is disposed on the board fixing portion 125 of the magnet holder 12.

[0055] The FPC 51 is a circuit board on which a driver IC 52 and a capacitor 53 are mounted. The FPC 51 is formed by laminating a thin insulating layer such as a resin film and a metal layer such as copper foil. The metal layer forms circuit wiring such as signal lines and power lines.

[0056] The upper spring elements 151 to 154, the lower spring elements 161 and 162, the driver IC 52, etc. are electrically connected to the circuit wiring of the FPC 51. Specifically, the FPC 51 has power input terminals 511 and 512, signal input terminals 513 and 514, and power output terminals 515 and 516.

[0057] The power input terminals 511 and 512 are respectively connected to the board connection portions 152f and 154f (see FIG. 7A) of the second upper spring element 152 and the fourth upper spring element 154. The signal input terminals 513 and 514 are respectively connected to the board connection portions 151f and 153f (see FIG. 7A) of the first upper spring element 151 and the third upper spring element 153. The power output terminals 515 and 516 are respectively connected to the board connection portions 161d and 162d of the first lower spring element 161 and the second lower spring element 162.

[0058] The driver IC 52 is a hardware processor that controls the current flowing through the AF coil 13. The driver IC 52 has a position detection sensor 54 built in.

[0059] The position detection sensor 54 is, for example, a magnetic sensor such as a Hall element or a TMR (Tunnel Magneto Resistance) sensor. The position detection sensor 54 can obtain the relative positions of the lens holder 11 and the magnet holder 12 in the Z-axis direction by detecting the strength of the magnetic force of a position detection magnet (not shown) arranged in the lens holder 11. The position detection sensor 54 and the position detection magnet are arranged, for example, to face each other in the radial direction.

[0060] The driver IC 52 controls the current flowing through the AF coil 13 based on, for example, a control signal from the module control unit 303 and the detection result of the position detection sensor 54 .

[0061] The OIS fixing unit 20 includes, for example, a base 21 and OIS coils 32A to 32D.

[0062] The base 21 has a rectangular shape in a plan view, and is formed with a circular opening 211 in the center. In the camera module A, an image sensor board 301 on which an image sensor 302 is mounted is disposed on the image forming side of the base 21 in the optical axis direction.

[0063] Wiring metal fittings 23 are embedded in the base 21 by, for example, insert molding. The wiring metal fittings 23 are electrically connected to the wiring pattern of the image sensor board 301, and form power supply lines for supplying power to the OIS coils 32A to 32D and the magnetic sensor (not shown), as well as signal lines for the detection signals output from the magnetic sensor.

[0064] Furthermore, the wiring metal fittings 23 form a power supply line for supplying power to the AF drive circuit board unit 50 of the OIS movable unit 10 and the blade drive device 4, as well as a signal line for supplying control signals. The wiring metal fittings 23 are exposed from the four corners of the base 21, and are connected to the other ends of the suspension wires 41 to 48 by soldering.

[0065] The OIS coils 32A to 32D are disposed in positions facing the drive magnets 31A to 31D in the optical axis direction. The OIS coils 32A to 32D are air-core coils that are energized during shake correction. The sizes and positions of the OIS coils 32A to 32D and the drive magnets 31A to 31D are set so that the radial edges of the drive magnets 31A to 31D fit within the cross-sectional width of each of the OIS coils 32A to 32D, that is, so that the magnetic field radiated from the bottom surfaces of the drive magnets 31A to 31D crosses the two opposing sides of the OIS coils 32A to 32D and returns to the drive magnets 31A to 31D.

[0066] Here, OIS coils 32A-32D have the same planar shape (here, a substantially isosceles trapezoidal shape) as drive magnets 31A-31D. This allows for efficient generation of drive force (electromagnetic force) for oscillating OIS movable part 10 in a plane perpendicular to the optical axis. The current flowing through OIS coils 32A-32D is controlled by, for example, module control unit 303.

[0067] Although not shown, magnetic sensors may be mounted on base 21. The magnetic sensors may be, for example, Hall elements or TMR sensors, and are disposed in positions facing drive magnets 31B and 31C in the optical axis direction. The magnetic sensors are disposed, for example, in the air-core portions of OIS coils 32B and 32C.

[0068] The OIS support part 40 is made up of multiple wire members. In the present embodiment, the OIS support part 40 is made up of eight suspension wires, namely, a first suspension wire 41 to an eighth suspension wire 48. Hereinafter, when the first suspension wire 41 to the eighth suspension wire 48 are not distinguished from one another, they will be referred to as "suspension wires 41 to 48."

[0069] The suspension wires 41-48 are arranged in pairs at the four corners of a rectangular shape in plan view. The suspension wires 41-48 are linear members extending in the optical axis direction and elastically deform as the OIS movable part 10 swings. One end of the suspension wires 41-48 (the end on the light-receiving side in the optical axis direction, the upper end) is fixed to the OIS movable part 10, and the other end (the end on the image-forming side in the optical axis direction) is fixed to the OIS fixed part 20. In the present embodiment, the suspension wires 41-48 are electrically and mechanically connected to the upper elastic support part 15 of the OIS movable part 10 and the wiring fittings 23 of the OIS fixed part 20.

[0070] The first suspension wire 41 functions as a common signal line that supplies a clock signal to the AF drive circuit board unit 50 and the blade drive device 4. The second suspension wire 42 functions as an AF power supply line that supplies positive power to the AF drive circuit board unit 50. The third suspension wire 43 functions as an AF signal line that supplies data signals to the AF drive circuit board unit 50. The fourth suspension wire 44 functions as a common power supply line that supplies negative power (ground) to the AF drive circuit board unit 50 and the blade drive device 4. One of the fifth suspension wire 45 and the sixth suspension wire 46 functions as a blade drive power supply line that supplies positive power to the blade drive device 4. One of the seventh suspension wire 47 and the eighth suspension wire 48 functions as a blade drive signal line that supplies data signals to the blade drive device 4.

[0071] <Upper Elastic Support Part 15> Figures 7A and 7B are top views showing the configuration of the upper elastic support part 15. Figure 7B shows the state in which the upper elastic support part 15 is attached to the lens holder 11 and the magnet holder 12. As shown in Figures 7A and 7B, the upper elastic support part 15 has six upper spring elements 151 to 156. The upper spring elements 151 to 156 are positioned relative to the lens holder 11 and the magnet holder 12 and fixed thereto by, for example, adhesive.

[0072] The first upper spring element 151 has a magnet holder fixing portion 151 a, a lens holder fixing portion 151 b, an arm portion 151 c, a wire connecting portion 151 d, a blade drive terminal connecting portion 151 e, and a board connecting portion 151 f. The first upper spring element 151, together with the first suspension wire 41, functions as a common signal line that supplies a clock signal to the AF drive circuit board portion 50 and the blade drive device 4.

[0073] The second upper spring element 152 has a magnet holder fixing portion 152 a, a wire connecting portion 152 d, and a board connecting portion 152 f. The second upper spring element 152 does not function as an AF support portion. The second upper spring element 152, together with the second suspension wire 42, functions as an AF power supply line that supplies positive power to the AF drive circuit board portion 50.

[0074] The third upper spring element 153 has a magnet holder fixing portion 153 a, a wire connecting portion 153 d, and a board connecting portion 153 f. The third upper spring element 153 does not function as an AF support portion. Instead, the third upper spring element 153, together with the third suspension wire 43, functions as an AF signal line that supplies a data signal to the AF drive circuit board unit 50.

[0075] The fourth upper spring element 154 has a magnet holder fixing portion 154 a, a lens holder fixing portion 154 b, an arm portion 154 c, a wire connecting portion 154 d, a blade drive terminal connecting portion 154 e, and a board connecting portion 154 f. The fourth upper spring element 154, together with the fourth suspension wire 44, functions as a common power supply line that supplies negative power (ground) to the AF drive circuit board portion 50 and the blade drive device 4.

[0076] The fifth upper spring element 155 has a magnet holder fixing portion 155 a, a lens holder fixing portion 155 b, an arm portion 155 c, wire connecting portions 155 d (two locations), and a blade drive terminal connecting portion 155 e. The fifth upper spring element 155, together with the fifth suspension wire 45 or the sixth suspension wire 46, functions as a blade drive power supply line that supplies positive power to the blade drive device 4.

[0077] The sixth upper spring element 156 has a magnet holder fixing portion 156 a, a lens holder fixing portion 156 b, an arm portion 156 c, wire connecting portions 156 d (two locations), and a blade drive terminal connecting portion 156 e. The sixth upper spring element 156, together with the seventh suspension wire 47 or the eighth suspension wire 48, functions as a blade drive signal line that supplies a data signal to the blade drive device 4.

[0078] The magnet holder fixing portions 151 a to 156 a are portions fixed to the magnet holder 12 , and have a shape corresponding to the upper spring fixing portion (reference numeral omitted) on the upper surface of the magnet holder 12 .

[0079] The lens holder fixing portions 151b, 154b to 156b are portions fixed to the lens holder 11, and have shapes corresponding to the upper spring fixing portions (reference numerals omitted) on the upper surface of the lens holder 11. The lens holder fixing portions 151b, 154b to 156b are displaced together with the lens holder 11 when the lens holder 11 moves in the optical axis direction.

[0080] The arm portions 151c, 154c to 156c connect the magnet holder fixing portions 151a, 154a to 156a to the lens holder fixing portions 151b, 154b to 156b. The arm portions 151c, 154c to 156c are portions that elastically deform in accordance with the movement of the lens holder 11, and have a winding shape that facilitates elastic deformation.

[0081] Wire connection portions 151d to 154d are connected to suspension wires 41 to 44. Wire connection portions 155d (two locations) of fifth upper spring element 155 are connected to fifth suspension wire 45 and sixth suspension wire 46. Wire connection portions 156d (two locations) of sixth upper spring element 156 are connected to seventh suspension wire 47 and eighth suspension wire 48.

[0082] The board connection portion 151f is electrically and mechanically connected to the signal input terminal 513 of the FPC 51. The board connection portion 152f is electrically and mechanically connected to the power input terminal 511 of the FPC 51. The board connection portion 153f is electrically and mechanically connected to the signal input terminal 514 of the FPC 51. The board connection portion 154f is electrically and mechanically connected to the power input terminal 512 of the FPC 51.

[0083] The blade drive terminal connection portion 151e is electrically and mechanically connected to a first wiring metal fitting 451 for a clock signal of the blade drive device 4. The blade drive terminal connection portion 154e is electrically and mechanically connected to a second wiring metal fitting 452 for a negative power supply of the blade drive device 4. The blade drive terminal connection portion 155e is electrically and mechanically connected to a third wiring metal fitting 453 for a positive power supply of the blade drive device 4. The blade drive terminal connection portion 156e is electrically and mechanically connected to a fourth wiring metal fitting 454 for a data signal of the blade drive device 4.

[0084] <Lower Elastic Support Part 16> Figures 8A and 8B are top views showing the configuration of the lower elastic support part 16. Figure 8B shows the state in which the lower elastic support part 16 is attached to the lens holder 11 and the magnet holder 12. As shown in Figures 8A and 8B, the lower elastic support part 16 has two lower spring elements 161 and 162.

[0085] The lower spring elements 161 and 162 each have a magnet holder fixing portion 161a and 162a, a lens holder fixing portion 161b and 162b, an arm portion 161c and 162c, a substrate connecting portion 161d and 162d, and a coil connecting portion 161e and 162e.

[0086] The magnet holder fixing portions 161 a and 162 a are portions fixed to the magnet holder 12 and have a shape corresponding to the magnet holder fixing portion (reference numeral omitted) on the underside of the magnet holder 12 .

[0087] The lens holder fixing portions 161b and 162b are portions fixed to the lens holder 11, and have a shape corresponding to a lens holder fixing portion (reference numeral omitted) on the underside of the lens holder 11. The lens holder fixing portions 161b and 162b are displaced together with the lens holder 11 when the lens holder 11 moves in the optical axis direction.

[0088] The arm portions 161c and 162c connect the magnet holder fixing portions 161a and 162a to the lens holder fixing portions 161b and 162b. The arm portions 161c and 162c are portions that elastically deform as the lens holder 11 moves, and have a meandering shape that allows for easy elastic deformation.

[0089] The board connection portions 161d and 162d are portions that are connected to the power output terminals 515 and 516 of the FPC 51. The board connection portions 161d and 162d are electrically and mechanically connected to the power output terminals 515 and 516 by, for example, soldering.

[0090] The coil connection portions 161e and 162e are portions that are connected to the AF coil 13 at the winding portion 112 of the lens holder 11. The coil connection portions 161e and 162e are electrically and mechanically connected to the AF coil 13 by, for example, soldering.

[0091] The lower spring elements 161 and 162 are positioned relative to the lens holder 11 and the magnet holder 12 and fixed thereto by, for example, adhesive. The lower spring elements 161 and 162, together with the second upper spring element 152 and the fourth upper spring element 154, function as power supply lines that supply power to the AF drive circuit board unit 50.

[0092] <Electrical System to AF Drive Circuit Board Unit 50 and Blade Drive Device 4> The first upper spring element 151 is electrically connected to the first suspension wire 41, the FPC 151, and the blade drive device 4. Therefore, a common clock signal is supplied to the AF drive circuit board unit 50 and the blade drive device 4 from the first suspension wire 41 via the first upper spring element 151.

[0093] The second upper spring element 152 is electrically connected to the second suspension wire 42 and the FPC 151. Therefore, a positive power source for AF drive is supplied from the second suspension wire 42 to the AF drive circuit board unit 50 via the second upper spring element 152.

[0094] The third upper spring element 153 is electrically connected to the third suspension wire 43 and the FPC 151. Therefore, an AF data signal is supplied from the third suspension wire 43 to the AF drive circuit board unit 50 via the third upper spring element 153.

[0095] The fourth upper spring element 154 is electrically connected to the fourth suspension wire 44, the FPC 151, and the blade drive device 4. Therefore, a common negative power supply (ground) is supplied to the AF drive circuit board unit 50 and the blade drive device 4 from the fourth suspension wire 44 via the fourth upper spring element 154.

[0096] The fifth upper spring element 155 is electrically connected to the fifth suspension wire 45, the sixth suspension wire 46, and the blade drive device 4. Therefore, a positive power source for driving the blades is supplied to the blade drive device 4 from the fifth suspension wire 45 or the sixth suspension wire 46 via the fifth upper spring element 155.

[0097] The sixth upper spring element 156 is electrically connected to the seventh suspension wire 47, the eighth suspension wire 48, and the blade drive device 4. Therefore, a data signal for driving the blades is supplied to the blade drive device 4 from the seventh suspension wire 47 or the eighth suspension wire 48 via the sixth upper spring element 156.

[0098] The lower spring elements 161 and 162 are electrically connected to the FPC 151 and the AF coil 13. Therefore, power is supplied from the AF drive circuit board unit 50 to the AF coil 13 via the lower spring elements 161 and 162.

[0099] 7A , the first upper spring element 151 and the second upper spring element 152 are disposed adjacent to each other. The first upper spring element 151 is used as a signal line, and the second upper spring element 152 is used as a power supply line for AF drive, so they must be insulated from each other. The same applies to the third upper spring element 153 and the fourth upper spring element 154.

[0100] In this embodiment, an insulating portion 157 that physically separates adjacent upper spring elements is provided to reliably insulate them from each other, such as between first upper spring element 151 and second upper spring element 152, and between third upper spring element 153 and fourth upper spring element 154. Insulating portion 157 is provided in the portion where two upper spring elements are close to each other.

[0101] 9A and 9B are diagrams showing an example of an insulating structure between adjacent upper spring elements, in which the insulating structure between the third upper spring element 153 and the fourth upper spring element 154 is shown.

[0102] 9A , insulating portion 157 is formed by a convex piece of magnet holder 12. The convex piece is formed on the upper surface of magnet holder 12 so as to protrude toward the space between third upper spring element 153 and fourth upper spring element 154. The convex piece, which is a hard structure, physically separates third upper spring element 153 and fourth upper spring element 154. Even if vibration occurs in third upper spring element 153 or fourth upper spring element 154, it will collide with insulating portion 157 made of the convex piece, so contact with the other can be reliably avoided.

[0103] In FIG. 9B , the insulating portion 157 is formed using an elastic adhesive. Examples of the elastic adhesive include a moisture-curing adhesive such as a silicone-based adhesive or a xyl-terminated polymer-based adhesive. By applying the elastic adhesive across the third upper spring element 153 and the fourth upper spring element 154, the elastic adhesive penetrates between the third upper spring element 153 and the fourth upper spring element 154. Once the elastic adhesive hardens, the third upper spring element 153 and the fourth upper spring element 154 are physically isolated from each other. Even if vibration occurs in the third upper spring element 153 or the fourth upper spring element 154, the insulating portion 157 made of the elastic adhesive maintains the relative positional relationship between the two, thereby reliably preventing contact with each other. Furthermore, the insulating portion 157 made of the elastic adhesive functions as a damper, thereby suppressing vibration and excessive displacement of the third upper spring element 153 and the fourth upper spring element 154.

[0104] The insulating portion 157 is not limited to the above-described configuration as long as it can reliably insulate adjacent upper spring elements.

[0105] <Operation of Optical Element Driving Device 1> When shake correction is performed in the optical element driving device 1, current is passed through the OIS coils 32A to 32D. Specifically, the OIS driving unit 30 controls the current passing through the OIS coils 32A to 32D based on a detection signal from a shake detection unit (not shown, for example, a gyro sensor) so as to cancel out shake of the camera module A. At this time, by feeding back the detection result of a magnetic sensor (not shown), it is possible to accurately control the swing of the OIS movable unit 10.

[0106] When current is applied to the OIS coils 32A to 32D, the interaction between the magnetic field of the drive magnets 31A to 31D and the current flowing through the OIS coils 32A to 32D generates a Lorentz force in the OIS coils 32A to 32D (Fleming's left-hand rule). The direction of the Lorentz force is perpendicular to the direction of the magnetic field (Z-axis direction) and the direction of the current in the long sides of the OIS coils 32A to 32D. Because the OIS coils 32A to 32D are fixed, a reaction force acts on the drive magnets 31A to 31D. This reaction force becomes the driving force for the OIS voice coil motor, causing the OIS movable part 10, which has the drive magnets 31A to 31D, to oscillate in the XY plane, thereby correcting shake.

[0107] When autofocusing is performed in the optical element driving device 1, current is applied to the AF coil 13. Power is supplied to the AF coil 13 from the AF drive circuit board 50 via the lower spring elements 161 and 162. When current is applied to the AF coil 13, a Lorentz force is generated in the AF coil 13 due to the interaction between the magnetic field of the drive magnets 31A to 31D and the current flowing through the AF coil 13. The direction of the Lorentz force is perpendicular to the direction of the magnetic field generated by the drive magnets 31A to 31D and the direction of the current flowing through the AF coil 13 (the Z-axis direction). Because the drive magnets 31A to 31D are fixed, a reaction force acts on the AF coil 13. This reaction force becomes the driving force for the AF voice coil motor, and the lens holder 11 (AF movable part) on which the AF coil 13 is disposed moves in the optical axis direction, thereby performing autofocusing.

[0108] The driver IC 52 of the optical element driving device 1 performs closed-loop control based on the detection signal of the built-in position detection sensor 54. The closed-loop control method does not require consideration of the hysteresis characteristics of the voice coil motor, and can directly detect that the position of the lens holder 11 has stabilized. Furthermore, it can also be used with image plane detection type autofocus. This results in high response performance and enables faster autofocus operation.

[0109] <Blade drive device 4> Fig. 10 is an exploded perspective view of the blade drive device 4. Fig. 11 is a cross-sectional view of the blade drive device 4. Fig. 12 is a plan view of the blade drive device 4 as seen from the light-receiving side in the optical axis direction. In Fig. 12, the pressing cover 47 is omitted.

[0110] As shown in FIGS. 10 to 12, the blade drive device 4 includes a frame 410, a slider 420, a blade drive section 430, a blade drive circuit board section 440, a power supply base 450, aperture blades 460, a presser cover 470, a blade drive support section 480, and the like.

[0111] The frame 410 is a fixed body that supports the slider 420 rotatably in the circumferential direction around the optical axis via the blade drive support portion 480 (first ball 481). The frame 410 has a frame main body portion 411 and an opening forming portion 412.

[0112] The frame main body 411 has a generally cylindrical shape. The blade drive circuit board 440 is disposed on the peripheral surface of the frame main body 411. The peripheral surface of the frame main body 411 is formed with recesses or openings into which the driver IC 442 and blade drive coils 432 mounted on the blade drive circuit board 440 can be disposed.

[0113] The opening forming portion 412 protrudes inward from the upper edge of the frame main body portion 411 to form an opening 413. The opening forming portion 412 has a plurality of guide holes 414 extending in the circumferential direction. The opening forming portion 412 has a plurality of engagement bosses 415 that protrude toward the light receiving side in the optical axis direction, on the outer circumferential side of the guide holes 414. The guide holes 414 and the engagement bosses 415 are each arranged at equal intervals in the circumferential direction.

[0114] A portion of the lower surface of the opening forming portion 412 on the image side in the optical axis direction is formed to bulge, and first ball support portions 416 are disposed in the bulged portion. The first ball support portions 416 are V-grooves having a V-shaped cross section. The first ball support portions 416 are disposed, for example, at three locations at equal intervals on the same circumference as the guide holes 414.

[0115] Furthermore, a magnetic plate 417 made of a magnetic material is fixed to the underside of the opening forming portion 412. The magnetic plate 417 has, for example, the same shape as the blade drive magnet 431 when viewed in a plan view from the optical axis direction, and is disposed at a position corresponding to the blade drive magnet 431.

[0116] The slider 420 is a cylindrical rotating body. The slider 420 is disposed radially inwardly of the frame 410 at a distance. Blade drive magnets 431 are disposed on the outer peripheral surface of the slider 420. The blade drive magnets 431 are disposed, for example, at three locations on the outer peripheral surface of the slider 420, at equal intervals in the circumferential direction.

[0117] The slider 420 has an engagement pin 421 on its upper surface that protrudes toward the light receiving side in the optical axis direction. The engagement pin 421 is provided to correspond to the guide hole 414 of the frame 410. When the slider 420 is assembled to the frame 410, the engagement pin 421 engages with the guide hole 414.

[0118] The slider 420 has, on its upper surface, a first ball holding portion 422 that houses the first ball 481. The first ball holding portion 422 is provided to correspond to the first ball support portion 416 of the frame 410. The first ball holding portions 422 are arranged, for example, in three locations at equal intervals. Two of the three first ball holding portions 422 are V-grooves, and the remaining one is a U-groove. By having one first ball holding portion 422 be a U-groove, dimensional tolerances can be absorbed.

[0119] The slider 420 also has a second ball holding portion 423 that houses the second ball 482, on the optical axis direction image side of the first ball holding portion 422. The second ball holding portion 423 is provided on the outer circumferential surface of the slider 420 so that the optical axis direction image side is open.

[0120] The slider 420 is supported by the frame 410 via the first ball 481 and held in a floating state as the blade driving magnet 431 is magnetically attracted to the magnetic plate 417 fixed to the frame 410 .

[0121] The blade driving unit 430 rotates the slider 420 relative to the frame 410. The blade driving unit 430 is composed of a blade driving coil 432 arranged on a blade driving circuit board unit 440 and a blade driving magnet 431 arranged on the slider 410. The blade driving circuit board unit 440 is fixed to the frame 410. That is, a moving magnet type voice coil motor is applied to the blade driving unit 430.

[0122] The blade drive circuit board unit 440 includes a flexible printed circuit board 441 (hereinafter referred to as “FPC 441 ”) and a driver IC 442 . The blade drive circuit board unit 440 is disposed on the outer circumferential surface of the frame 410 .

[0123] The FPC 441 is a circuit board on which the driver IC 442 and the blade drive coil 432 are mounted. The FPC 441 is formed by laminating, for example, a thin insulating layer such as a resin film and a metal layer such as copper foil. The metal layer forms circuit wiring such as signal lines and power lines.

[0124] The first wiring metal fittings 451 to fourth wiring metal fittings 454 of the power supply base 450 are electrically connected to the circuit wiring of the FPC 441. The driver IC 442 controls the current flowing through the blade drive coil 432 based on a control signal from the module control unit 303, for example.

[0125] The first to fourth wiring metal fittings 451 to 454 are embedded in the power supply base 450 by, for example, insert molding. The first to fourth wiring metal fittings 451 to 454 are electrically connected to the blade drive unit. The first to fourth wiring metal fittings 451 to 454 are also electrically connected to the first upper spring element 151 and the fourth to sixth upper spring elements 154 to 156 of the optical element drive device 1, respectively.

[0126] The diaphragm blades 460 are made up of, for example, six blade members 461. The diaphragm blades 460 are attached so as to straddle the frame 410 and the slider 420, and move in conjunction with the rotation of the slider 420 to open and close the opening of the frame 410.

[0127] Specifically, each blade member 461 has an engagement hole 462 and a cam hole 463. The engagement hole 462 is fitted into the engagement boss 415 of the frame 410. The cam hole 463 is engaged with the engagement pin 421 of the slider 420.

[0128] The retaining cover 470 is disposed on the light receiving side of the diaphragm blade 460 in the optical axis direction, and prevents the diaphragm blade 460 from falling off.

[0129] The blade drive support part 480 rotatably supports the slider 410 with respect to the frame 420. In this embodiment, the blade drive support part 480 is made up of first balls 481 and second balls 482. In this embodiment, three first balls 481 and three second balls 482 are arranged.

[0130] The first ball 481 is sandwiched between the first ball support portion 416 of the frame 410 and the first ball holding portion 422 of the slider 420, and rotatably supports the slider 420 relative to the frame 410. The second ball 482 is fitted into a space formed by the inner surface of the frame main body portion 411 of the frame 410, the second ball holding portion 423 of the slider 420, and the power supply base 450, and provides auxiliary support for the slider 420 relative to the frame 410.

[0131] By fitting the three second balls 482 between the frame 410 and the slider 420, the radial position of the slider 420 relative to the frame 410 is stabilized. Therefore, the slider 420, which is held in a floating state by magnetic attraction, can be rotated in a stable posture. Furthermore, because radial displacement of the slider 420 relative to the frame 410 is suppressed, the separation distance between the frame 410 and the slider 420 is secured, and it is possible to prevent the blade drive coil 432 and the blade drive magnet 431 from coming into contact with each other and being damaged.

[0132] <Operation of Blade Drive Device 4> Power and control signals (clock signals and data signals) are supplied to the first to fourth wiring fittings 451 to 454 of the power supply base 450 via the first upper spring element 151 and the fourth to sixth upper spring elements 154 to 156 of the optical element drive device 1. The blade drive unit 430 is driven based on the supplied power and control signals, causing the slider 420 to rotate relative to the frame 410. As the slider 420 rotates, the engagement pin 421 of the slider 420 moves circumferentially, pressing the cam hole 463 of the blade member 461, causing the blade member 461 to rotate around the engagement boss 415 of the frame 410. This opens and closes the opening 413 of the frame 41, adjusting the amount of light incident on the lens unit 2.

[0133] As described above, the blade drive device 4 according to this embodiment has the following features either alone or in appropriate combination.

[0134] That is, the blade drive device 4 is a blade drive device that can adjust the amount of light incident on the lens portion 2 (optical element), and is equipped with: a frame 410 (fixed body) having a cylindrical frame main body portion 421 (main body portion); an opening forming portion 412 that is arranged on the light receiving side in the optical axis direction of the frame main body portion 421 and forms an opening 413; a slider 420 (movable body) that is held in a state magnetically attracted to the opening forming portion 412 and is rotatable relative to the frame 410; a blade drive portion 430 that rotates the slider 420; an aperture blade 460 that opens and closes the opening 413 in conjunction with the rotation of the slider 420; a plurality of first balls 481 interposed between the opening forming portion 412 and the slider 420; and a plurality of second balls 482 interposed between the frame main body portion 413 and the slider 420.

[0135] The blade drive device 4 comprises a magnetic plate 417 arranged in the opening forming portion 412 and a blade drive magnet 431 arranged on a slider 420 (movable body), and the slider 420 is attracted to the opening forming portion 412 by the magnetic attraction force between the magnetic plate 417 and the blade drive magnet 431.

[0136] The blade drive unit 430 is made up of a blade drive magnet 431 and a blade drive coil 432 arranged on the frame 410 (fixed body).

[0137] According to the blade driving device 4, the slider 420 can be rotated with respect to the frame 410 in a stable position, and reliability is significantly improved.

[0138] The invention made by the inventor has been specifically described above based on an embodiment, but the present invention is not limited to the above embodiment and can be modified within the scope of the gist thereof.

[0139] For example, while the above embodiment has been described using a smartphone M as an example, the present invention can be applied to camera-equipped devices having a camera module and an image processing unit that processes image information obtained by the camera module. Camera-equipped devices include information devices and transportation equipment. Information devices include, for example, camera-equipped mobile phones, laptop computers, tablet terminals, portable game consoles, web cameras, and camera-equipped in-vehicle devices (e.g., backup monitor devices, drive recorder devices). Transportation equipment includes, for example, automobiles and drones (unmanned aerial vehicles).

[0140] 13A and 13B are diagrams showing an automobile V as a camera-mounted device equipped with an in-vehicle camera module VC (Vehicle Camera). FIG. 13A is a front view of the automobile V, and FIG. 13B is a rear perspective view of the automobile V. The automobile V is equipped with the camera module A described in the above embodiment as the in-vehicle camera module VC. As shown in FIGS. 13A and 13B , the in-vehicle camera module VC is attached, for example, to the windshield facing forward or to the rear gate facing backward. This in-vehicle camera module VC is used for backup monitoring, drive recorders, collision avoidance control, autonomous driving control, etc.

[0141] Furthermore, in the above embodiment, the optical element driving device 1 that drives the lens unit 2 as an optical element has been described, but the optical element to be driven may be an optical element other than a lens, such as a mirror, a prism, etc. Furthermore, the present invention can also be applied to an optical element driving device that drives, for example, an imaging element as an optical element.

[0142] Furthermore, in the above embodiment, the optical element driving device 1 has an AF function, but it may also have a function of moving the lens unit 2 in the Z-axis direction, such as a zoom function, in addition to the AF function.

[0143] Furthermore, the structure of the electrical system shown in the embodiment, for example, the shapes and arrangements of the first upper spring element 151 to the sixth upper spring element 156, are not particularly limited and can be modified as appropriate.

[0144] The embodiments disclosed herein should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above description, and is intended to include all modifications within the meaning and scope of the claims.

[0145] The disclosures of the specification, drawings and abstract contained in U.S. Provisional Application No. 63 / 509,781, filed June 23, 2023, are incorporated herein by reference in their entirety.

[0146] 4 Blade drive device 410 Frame 420 Slider 430 Blade drive unit 431 Blade drive magnet 432 Blade drive coil 440 Blade drive circuit board unit 450 Power supply plate 460 Aperture blade M Smartphone A Camera module

Claims

1. An optical element drive device that can be used together with a vane drive device for adjusting the amount of light incident on an optical element, A cylindrical container, A holder is disposed inside the aforementioned housing and capable of holding an optical element, A leaf spring member supports the holder so that it can move in the optical axis direction relative to the housing, A drive unit for moving the holder in the optical axis direction, The system comprises a first circuit board section on which a position detection unit for detecting the position of the holder in the optical axis direction is mounted, The first circuit board section is arranged in the housing, The leaf spring member has a first connection portion connected to the electrical system of the blade drive device and a second connection portion connected to the first circuit board portion. Optical element driving device.

2. The first connecting portion is arranged on the light-receiving side surface of the holder in the optical axis direction, The second connecting portion is located on the light-receiving side of the housing in the optical axis direction, The optical element driving device according to claim 1.

3. The leaf spring member has an arm portion that elastically deforms as the holder moves, The first connection part and the second connection part are connected via the arm part. The optical element driving device according to claim 2.

4. The housing has a rectangular shape in a plan view as seen from the optical axis direction, The first circuit board section is arranged along one side of the rectangular shape, The optical element driving device according to claim 1.

5. The leaf spring member is connected to the housing at the end of the side on which the first circuit board portion is located. The optical element driving device according to claim 4.

6. The leaf spring member supplies a negative power supply or a clock signal to the electrical system of the blade drive device and the first circuit board. The optical element driving device according to claim 1.

7. The first connection portion is connected to the second circuit board portion of the blade drive device, The optical element driving device according to claim 1.

8. The optical element driving device according to Claim 1, An imaging unit that captures an image of a subject using the aforementioned optical element, The vane drive device comprises, Camera module.

9. The blade drive device comprises a second circuit board section, The first circuit board portion and the second circuit board portion are connected via the leaf spring member. The camera module according to claim 8.

10. The blade drive device is A fixed body and A movable body that can rotate relative to the fixed body, A drive unit that rotates the aforementioned movable body, It comprises aperture blades that open and close the opening in conjunction with the rotation of the aforementioned movable body, The drive unit is mounted on the second circuit board. The camera module according to claim 9.

11. A camera-mounted device which is an information device or a transport device, A camera module comprising the camera module described in claim 8, A device equipped with a camera.