Imaging device and lens barrel

Abstract

To improve the quality of an image.SOLUTION: A terminal 602a of an inductor 600a is connected with a terminal 701a of primary winding 711a. A terminal 601b of an inductor 600b is connected with a terminal 701b of primary winding 711b. When seen in a direction D0, the inductor 600a is wound clockwise from a terminal 601a toward the terminal 602a. When seen in the direction D0, the inductor 600b is wound anticlockwise from a terminal 602b toward the terminal 601b. When the primary winding 711a is seen from an axis C1 intersecting with a lens 212 in parallel with an optical axis C0, the primary winding 711a is wound anticlockwise from the terminal 701a toward a terminal 702a. When the primary winding 711b is seen from an axis C2 intersecting with the lens 212 in parallel with the optical axis C0, the primary winding 711b is wound clockwise from the terminal 701b toward a terminal 702b.SELECTED DRAWING: Figure 6

Description

Technical Field

[0001] The present invention relates to a technique for countermeasures against magnetic field noise in an imaging device.

Background Art

[0002] Imaging devices such as digital video cameras and digital still cameras have image sensors. When magnetic field noise intersects with an image sensor, disturbances caused by the magnetic field noise occur in the captured image. In contrast, Patent Document 1 discloses an electronic circuit device provided with two inductors as a method for reducing magnetic field noise.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In recent years, the ISO sensitivity of image sensors has been increasing, and it is required to generate clearer images even when imaging in scenes with low light levels such as at night. As the ISO sensitivity of the image sensor increases, the sensitivity to weak magnetic field noise, which was not a problem conventionally, has also increased, and further reduction of magnetic field noise has been required.

[0005] Therefore, an object of the present invention is to improve the quality of an image.

Means for Solving the Problems

[0006] The imaging apparatus of the present invention comprises an image sensor, a lens, and an electrical module located outside the lens when viewed in a first direction along the optical axis of the lens, wherein the electrical module comprises a first inductor including a first terminal and a second terminal, a first transformer having a first primary winding including a third terminal and a fourth terminal, a second inductor including a fifth terminal and a sixth terminal, and a second transformer having a second primary winding including a seventh terminal and an eighth terminal, wherein the second terminal of the first inductor is connected to the third terminal of the first primary winding, and the fifth terminal of the second inductor is connected to the seventh terminal of the second primary winding, and Viewed in a first direction, the first inductor is wound clockwise from the first terminal to the second terminal; Viewed in a first direction, the second inductor is wound counterclockwise from the sixth terminal to the fifth terminal; Viewed from a first axis parallel to the optical axis and intersecting the lens with respect to the first primary winding, the first primary winding is wound counterclockwise from the third terminal to the fourth terminal; Viewed from a second axis parallel to the optical axis and intersecting the lens with respect to the second primary winding, the second primary winding is wound clockwise from the seventh terminal to the eighth terminal.

[0007] The imaging device of the present invention comprises an imaging device body and a lens barrel detachable from the imaging device body, wherein the lens barrel comprises a lens and an electrical module located outside the lens when viewed in a first direction along the optical axis of the lens, wherein the electrical module comprises a first inductor including a first terminal and a second terminal, a first transformer having a first primary winding including a third terminal and a fourth terminal, a second inductor including a fifth terminal and a sixth terminal, and a second transformer having a second primary winding including a seventh terminal and an eighth terminal, wherein the second terminal of the first inductor is connected to the third terminal of the first primary winding, and the fifth terminal of the second inductor is connected to the second primary winding The inductor is connected to the seventh terminal of the wire, and when viewed in the first direction, the first inductor is wound clockwise from the first terminal to the second terminal, when viewed in the first direction, the second inductor is wound counterclockwise from the sixth terminal to the fifth terminal, when viewed from a first axis parallel to the optical axis and intersecting the lens, the first primary winding is wound counterclockwise from the third terminal to the fourth terminal, and when viewed from a second axis parallel to the optical axis and intersecting the lens, the second primary winding is wound clockwise from the seventh terminal to the eighth terminal.

[0008] The lens barrel of the present invention is a lens barrel that can be attached to and detached from the main body of an imaging device, and comprises a lens and an electrical module located outside the lens when viewed in a first direction along the optical axis of the lens, wherein the electrical module comprises a first inductor including a first terminal and a second terminal, a first transformer having a first primary winding including a third terminal and a fourth terminal, a second inductor including a fifth terminal and a sixth terminal, and a second transformer having a second primary winding including a seventh terminal and an eighth terminal, wherein the second terminal of the first inductor is connected to the third terminal of the first primary winding, and the fifth terminal of the second inductor is connected to the seventh terminal of the second primary winding The inductor is connected such that, when viewed in the first direction, the first inductor is wound clockwise from the first terminal to the second terminal, when viewed in the first direction, the second inductor is wound counterclockwise from the sixth terminal to the fifth terminal, when viewed from a first axis parallel to the optical axis and intersecting the lens, the first primary winding is wound counterclockwise from the third terminal to the fourth terminal, and when viewed from a second axis parallel to the optical axis and intersecting the lens, the second primary winding is wound clockwise from the seventh terminal to the eighth terminal. [Effects of the Invention]

[0009] According to the present invention, image quality is improved. [Brief explanation of the drawing]

[0010] [Figure 1] This is an explanatory diagram of a digital camera, which is an example of an imaging device according to the embodiment. [Figure 2] This is an explanatory diagram of a digital camera, which is an example of an imaging device according to the embodiment. [Figure 3] This is a block diagram illustrating the circuit configuration of the drive module and drive motor according to the embodiment. [Figure 4] This is a component view of the inductor according to the embodiment. [Figure 5] This is a component view of a transformer according to an embodiment. [Figure 6] It is a component plan view showing the positional relationship of each component according to the embodiment. [Figure 7] It is a schematic diagram for explaining the relationship between each component according to the embodiment and the wiring pattern. [Figure 8] It is a side view of a component for explaining the magnetic flux leaking from the inductor and transformer according to the embodiment. [Figure 9] It is a side view of a component for explaining the magnetic flux leaking from the inductor and transformer according to the embodiment. [Figure 10] It is a plan view of a component showing the direction of magnetic flux leaking from the inductor and transformer according to the embodiment. [Figure 11] It is a schematic diagram showing the component arrangement of Comparative Example 1. [Figure 12] It is a schematic diagram showing the component arrangement of Example 1. [Figure 13] It is a schematic diagram showing the component arrangement of Comparative Example 2. [Figure 14] It is a schematic diagram showing the component arrangement of Comparative Example 3. [Figure 15] It is a graph showing the experimental results of Example 1 and Comparative Examples 1 to 3. [Figure 16] (a) to (c) are schematic diagrams showing the component arrangements of Modification Examples 1 to 3. [Figure 17] (a) to (d) are schematic diagrams showing the component arrangements of Modification Examples 4 to 7.

Mode for Carrying Out the Invention

[0011] Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. FIGS. 1 and 2 are explanatory diagrams of a digital camera 1000 which is an example of an imaging device according to the embodiment. FIG. 1 is a schematic diagram of the digital camera 1000 seen from the front. FIG. 2 is a schematic diagram of the digital camera 1000 seen from above.

[0012] The digital camera 1000 is, for example, a digital single-lens reflex camera. The digital camera 1000 includes a camera body 100 which is an imaging device main body, and a lens barrel 200 that is detachable from the camera body 100. The lens barrel 200 is an interchangeable lens. Hereinafter, the positional relationship between the components of the lens barrel 200 and the components of the camera body 100 will be described on the premise that the lens barrel 200 is attached to the camera body 100.

[0013] The camera body 100 is a part of the housing 110 of the digital camera 1000 and includes an exterior case 101 which is the housing of the camera body 100. The exterior case 101 has a mounting portion 102 to which the lens barrel 200 is mounted. The mounting portion 102 is formed in a ring shape when viewed from the front.

[0014] The camera body 100 has an imaging unit 400 disposed inside the exterior case 101. The imaging unit 400 includes an image sensor 300 including a light receiving surface 301, electronic components (not shown) for controlling an image signal, and a printed wiring board 103 on which the image sensor 300 and the electronic components (not shown) are mounted. The light receiving surface 301 is rectangular when viewed from the front.

[0015] Here, an XYZ coordinate system is defined with reference to the image sensor 300. The direction perpendicular to the light receiving surface 301 of the image sensor 300 is defined as the Z direction. Also, among the directions orthogonal to the Z direction, the direction along the long side of the light receiving surface 301 of the image sensor 300 is defined as the X direction, and the direction along the short side of the light receiving surface 301 is defined as the Y direction. Among the Z directions, the normal direction of the light receiving surface 301 is defined as the Zl direction, and the direction opposite to the normal direction of the light receiving surface 301, that is, the direction opposite to the Zl direction is defined as the Z2 direction. The Z2 direction is the direction in which the light receiving surface 301 of the image sensor 300 is viewed from the front. FIG. 1 is a view of the digital camera 1000 viewed in the Z2 direction. Among the X directions, the right direction of the paper surface of FIG. 1 is defined as the X1 direction, and the left direction of the paper surface of FIG. 1, that is, the direction opposite to the X1 direction is defined as the X2 direction. Also, among the Y directions, the upward direction of the paper surface of FIG. 1 is defined as the Y1 direction, and the downward direction of the paper surface of FIG. 1, that is, the direction opposite to the Y1 direction is defined as the Y2 direction.

[0016] The lens barrel 200 is part of the housing 110 of the digital camera 1000 and includes a lens housing 201 which is the housing of the lens barrel 200. The lens barrel 200 also includes an imaging optical system 202 which is located inside the lens housing 201 and forms an optical image on the light-receiving surface 301 of the image sensor 300 when the lens barrel 200 is mounted on the outer case 101. The lens barrel 200 is also formed in a ring shape when viewed from the front and has a mount 204 which is mounted on the mounting portion 102 of the outer case 101. In this embodiment, the housing 110 of the digital camera 1000 is composed of the outer case 101 and the lens housing 201.

[0017] The image sensor 300 is, for example, a CMOS image sensor or a CCD image sensor. The external shape of the image sensor 300 is rectangular when viewed in the Z2 direction. The image sensor 300 is positioned inside the outer case 101 such that when the lens barrel 200 is mounted in the outer case 101, the light-receiving surface 301 faces the imaging optical system 202 in the direction of the optical axis. The image sensor 300 converts the light image formed on the light-receiving surface 301 into photoelectric signals and outputs the image signal to the printed circuit board 103.

[0018] The imaging optical system 202 has multiple lenses 211 and 212. Lens 211 is the subject-side lens located on the light-incident side of the lens housing 201. Lens 212 is the imaging device body-side lens located on the light-output side of the lens housing 201. The optical axis of the imaging optical system 202 coincides with the optical axis C0 of lens 212. Lens 211 is fixed to the lens housing 201. Lens 212 is supported by the lens housing 201 via a slider 60 so as to be slidable in a direction parallel to the optical axis C0. The direction of light propagation parallel to the optical axis C0 is denoted by the direction D0 indicated by the arrow. Direction D0 is an example of a first direction. The optical axis C0 intersects perpendicularly with the light-receiving surface 301 of the image sensor 300. Therefore, direction D0 is the same direction as the Z2 direction.

[0019] The lens barrel 200 is located inside the lens housing 201 and includes a drive motor 50 that drives the lens 212 of the imaging optical system 202 via a slider 60. The drive motor 50 is also an example of a load. The lens barrel 200 also includes a drive module 500. The drive module 500 is located inside the lens housing 201 and is positioned outside the lens 212 when viewed in direction D0. The drive module 500 supplies power to the drive motor 50 to control the driving operation of the lens 212 of the imaging optical system 202 by the drive motor 50. The drive module 500 is an example of a printed circuit board and is an example of an electrical module.

[0020] The drive module 500 has a printed circuit board 250 and two inductors 600a and 600b and two transformers 700a and 700b mounted on the printed circuit board 250. Inductor 600a is an example of a first inductor. Inductor 600b is an example of a second inductor. Transformer 700a is an example of a first transformer. Transformer 700b is an example of a second transformer. Note that Figure 2 schematically illustrates only inductor 600a of the two inductors 600a and 600b, and only transformer 700a of the two transformers 700a and 700b.

[0021] The printed circuit board 250 of the drive module 500 is shaped in a way that does not obstruct the optical path from the imaging optical system 202 to the light-receiving surface 301 of the image sensor 300. In this embodiment, it is shaped like a ring when viewed in the Z direction. Each inductor 600a, 600b and each transformer 700a, 700b are mounted on the main surface 2501 of the printed circuit board 250, opposite to the main surface 2502 facing the camera body 100. Main surface 2501 is the first main surface, and main surface 2502 is the second main surface. Of the main surfaces 2501 and 2502, main surface 2502 is closer to the light-receiving surface 301 of the image sensor 300 than main surface 2501. Also, the distance L1 between transformers 700a and 700b is narrower than the distance L2 between the drive module 500 and the image sensor 300.

[0022] The digital camera 1000 employs a contrast-detection autofocus system that detects a signal corresponding to the subject's focus evaluation value and drives the imaging optical system 202 with a drive module 500 to achieve focus.

[0023] Figure 3 is a block diagram illustrating the circuit configuration of the drive module 500 and drive motor 50 according to the embodiment. A battery 20 is located inside the outer casing 101 of the camera body 100. The drive module 500 includes a drive circuit 30 that receives a DC voltage from the battery 20 and outputs an A-phase drive current IA and a B-phase drive current IB, which are alternating currents for operating the drive motor 50. Drive current IA is an example of a first alternating current. Drive current IB is an example of a second alternating current. The drive currents IA and IB for each phase are, for example, alternating currents with a drive frequency of 1 kHz or more and less than 1 MHz, i.e., in the kHz band.

[0024] The drive module 500 includes a printed circuit board 250 and, mounted on the printed circuit board 250, a drive circuit 30, two inductors 600a and 600b, and two transformers 700a and 700b. The drive circuit 30 has terminals A10 and A20 that output the A-phase drive current IA, and terminals B10 and B20 that output the B-phase drive current IB. The printed circuit board 250 has a plurality of wiring patterns 501a, 502a, 503a, 501b, 502b, and 503b.

[0025] Inductor 600a has two terminals 601a and 602a. Terminal 601a is an example of a first terminal, and terminal 602a is an example of a second terminal. Transformer 700a has a primary winding 711a and a secondary winding 712a. Primary winding 711a is an example of a first primary winding. Secondary winding 712a is an example of a first secondary winding. Secondary winding 712a outputs a voltage obtained by boosting the voltage applied to primary winding 711a. Primary winding 711a has two terminals 701a and 702a. Terminal 701a is an example of a third terminal, and terminal 702a is an example of a fourth terminal.

[0026] Terminal A10 of the drive circuit 30 and terminal 601a of the inductor 600a are electrically connected by wiring pattern 501a. Terminal 602a of the inductor 600a and terminal 701a of the primary winding 711a of the transformer 700a are electrically connected by wiring pattern 502a. Terminal 702a of the primary winding 711a and terminal A20 of the drive circuit 30 are electrically connected by wiring pattern 503a. Therefore, the inductor 600a and the primary winding 711a of the transformer 700a are connected in series. Furthermore, since the A-phase drive current IA is an alternating current, the drive current IA periodically switches between the phase output from terminal A10 and the phase output from terminal A20. The case where the drive current IA is output from terminal A10 is expressed as positive, and conversely, the case where the drive current IA is output from terminal A20 is expressed as negative. When the drive current IA is positive, the drive current IA flows to terminal A20 via inductor 600a and primary winding 711a. Conversely, when the drive current IA is negative, the drive current IA flows to terminal A10 via primary winding 711a and inductor 600a.

[0027] Inductor 600b has two terminals 601b and 602b. Terminal 601b is an example of a fifth terminal, and terminal 602b is an example of a sixth terminal. Transformer 700b has a primary winding 711b and a secondary winding 712b. The secondary winding 712b outputs a voltage obtained by boosting the voltage applied to the primary winding 711b. Primary winding 711b is an example of a second primary winding. Secondary winding 712b is an example of a second secondary winding. Primary winding 711b has two terminals 701b and 702b. Terminal 701b is an example of a seventh terminal, and terminal 702b is an example of an eighth terminal.

[0028] Terminal B10 of the drive circuit 30 and terminal 602b of the inductor 600b are electrically connected by wiring pattern 501b. Terminal 601b of the inductor 600b and terminal 701b of the primary winding 711b of the transformer 700b are electrically connected by wiring pattern 502b. Terminal 702b of the primary winding 711b and terminal B20 of the drive circuit 30 are electrically connected by wiring pattern 503b. Therefore, the inductor 600b and the primary winding 711b of the transformer 700b are connected in series. Furthermore, since the drive current IB of phase B is an alternating current, the drive current IB periodically switches between the phase output from terminal B10 and the phase output from terminal B20. The case where the drive current IB is output from terminal B10 is expressed as positive, and conversely, the case where the drive current IB is output from terminal B20 is expressed as negative. When the drive current IB is positive, the drive current IB flows to terminal B20 via inductor 600b and primary winding 711b. Conversely, when the drive current IB is negative, the drive current IB flows to terminal B10 via primary winding 711b and inductor 600b.

[0029] Thus, the drive circuit 30 is configured to supply a drive current IA to the primary winding 711a of the series-connected inductor 600a and transformer 700a, and to supply a drive current IB to the series-connected inductor 600b and transformer 700b, and to supply a drive current IB to the primary winding 711b of the series-connected inductor 600b and transformer 700b. The phase difference between the A-phase drive current IA output from terminals A10 and A20 of the drive circuit 30 and the B-phase drive current IB output from terminals B10 and B20 is within the range of -90 degrees to 90 degrees.

[0030] The drive current IA of phase A and the drive current IB of phase B each become secondary currents in the secondary windings of the corresponding transformers 700a and 700b, respectively, and these secondary currents flow to the drive motor 50 via the flexible printed circuit board (FPC) 40. Unwanted high-frequency currents may also be superimposed on each drive current IA and IB output from the drive circuit 30. Therefore, in order to remove the high-frequency currents from each drive current IA and IB, an inductor 600a is placed between the drive circuit 30 and the FPC 40 for phase A, and an inductor 600b is placed between the drive circuit 30 and the FPC 40 for phase B. In addition, in order to boost the voltage output from the drive circuit 30, a transformer 700a is placed between the drive circuit 30 and the FPC 40 for phase A, and a transformer 700b is placed between the drive circuit 30 and the FPC 40 for phase B. That is, the drive current IA of phase A output from the drive circuit 30 is supplied to the drive motor 50 as a secondary current via inductor 600a and transformer 700a. Furthermore, the B-phase drive current IB output from the drive circuit 30 is supplied to the drive motor 50 as a secondary current via the inductor 600b and the transformer 700b.

[0031] When current flows through inductors 600a and 600b, and transformers 700a and 700b, leakage magnetic fields are generated from each. When these leakage magnetic fields reach the image sensor 300 shown in Figure 2, they become magnetic field noise in the image sensor 300. In Figure 2, the leakage magnetic fields are indicated by dashed arrows, but since they are alternating magnetic fields generated by alternating current, the leakage magnetic fields alternately switch between the direction of the dashed arrows and the opposite direction.

[0032] This section explains the relationship between applied current and leakage magnetic field for inductor 600a and transformer 700a.

[0033] Figure 4 is a component view of an inductor 600a according to an embodiment. The inductor 600a has a winding portion 630a, a pair of wire portions 631a and 632a extending from the winding portion 630a, a pair of terminals 601a and 602a, and a magnetic core (not shown). The winding portion 630a is wound around the magnetic core (not shown). When the inductor 600a is viewed in the Z2 direction, the winding portion 630a is wound clockwise from terminal 601a to terminal 602a. In Figure 4, a black triangle mark is placed at the corner of the inductor 600a where terminal 601a is located.

[0034] The winding portion 630a and the pair of wire portions 631a and 632a are made of a conductive material, such as copper. The winding portion 630a and the pair of wire portions 631a and 632a are made of a single continuous conductor wire. That is, the winding portion 630a and the pair of wire portions 631a and 632a are continuous. The winding portion 630a and the pair of wire portions 631a and 632a are surrounded by a magnetic core (not shown). The magnetic core is made of a magnetic material, such as ferrite. The pair of wire portions 631a and 632a are joined to a pair of terminals 601a and 602a, respectively, by a bonding member such as solder. That is, wire portion 631a is joined to terminal 601a, and wire portion 632a is joined to terminal 602a. Terminals 601a and 602a are made of a conductive material. Terminals 601a and 602a are bonded to a magnetic core (not shown). The winding section 630a is wound around a magnetic core (not shown). The conductor wire of the winding section 630a is covered with an insulator (not shown). In addition, the conductor wires of each wire section 631a and 632a are covered with an insulator (not shown) except for the portions that are joined to terminals 601a and 602a.

[0035] When a positive current is applied to terminal 601a, the current flows clockwise through the winding portion 630a when viewed from the component surface, i.e., in the Z2 direction. In Figure 4, the dashed line represents the leakage magnetic field 640a from inductor 600a. A magnetic flux is generated in the Z2 direction inside inductor 600a, i.e., the winding portion 630a. As a result, the leakage magnetic field 640a is generated radially in a direction intersecting the Z direction.

[0036] Furthermore, when a positive current is applied to terminal 602a, the current flows counterclockwise through the winding portion 630a when viewed from the component surface, i.e., in the Z2 direction. A magnetic flux is generated in the Z1 direction inside inductor 600a, i.e., inside the winding portion 630a. As a result, the leakage magnetic field 640a is generated radially in a direction intersecting the Z direction. Note that inductor 600b has the same configuration as inductor 600a.

[0037] Figure 5 is a component view of a transformer 700a according to an embodiment. The transformer 700a has a primary winding 711a, a secondary winding 712a (Figure 3), and a magnetic core 720a. The primary winding 711a includes a winding portion 730a, a pair of wire portions 731a and 732a extending from the winding portion 730a, and a pair of terminals 701a and 702a. The primary winding 711a and the secondary winding 712a (Figure 3) are wound around the magnetic core 720a. Viewed in the Y2 direction, the primary winding 711a is wound counterclockwise from terminal 701a to terminal 702a. In Figure 5, a black triangle mark is placed at the corner of the transformer 700a where terminal 701a is located.

[0038] The winding section 730a and the pair of wire sections 731a and 732a are made of a conductive material, such as copper. The winding section 730a and the pair of wire sections 731a and 732a are made of a single continuous conductor wire. That is, the winding section 730a and the pair of wire sections 731a and 732a are continuous. The pair of wire sections 731a and 732a are joined to a pair of terminals 701a and 702a, respectively, with a joining member such as solder. That is, wire section 731a is joined to terminal 701a, and wire section 732a is joined to terminal 702a. Terminals 701a and 702a are made of a conductive material. Terminals 701a and 702a are bonded to the magnetic core 720a. The winding section 730a is wound around the magnetic core 720a. The conductor wire of the winding section 730a is covered with an insulator (not shown). Furthermore, the conductor wires of each wire section 731a and 732a are covered with an insulator (not shown) except for the portions joined to each terminal 701a and 702a. The magnetic core 720a is made of a magnetic material, such as ferrite.

[0039] When a positive current is applied to terminal 701a, the current flows counterclockwise through the winding 730a in the Y2 direction. A magnetic flux is generated inside the winding 730a in the Y1 direction. In Figure 5, the dashed line represents the leakage magnetic field 740a from transformer 700a. Transformer 700b has the same configuration as transformer 700a.

[0040] Figure 6 is a component view showing the positional relationship of the inductors 600a, 600b, transformers 700a, 700b, printed circuit board 250, lens 212, and image sensor 300 according to the embodiment. Figure 7 is a schematic diagram to explain the relationship between the inductors 600a, 600b and transformers 700a, 700b according to the embodiment and the wiring pattern 550, which is part of the wiring pattern included in the printed circuit board 250. For the sake of explanation, the inductors 600a, 600b and transformers 700a, 700b and the wiring pattern 550 are shown separately. The arrangement of the inductors 600a, 600b and transformers 700a, 700b will be explained below with reference to Figures 6 and 7.

[0041] Inductor 600a includes two terminals 601a, 602a, two wire sections 631a, 632a, a winding section 630a, and a magnetic core (not shown). Inductor 600b includes two terminals 601b, 602b, two wire sections 631b, 632b, a winding section 630b, and a magnetic core (not shown). Transformer 700a has a primary winding 711a and a magnetic core 720a. Transformer 700b has a primary winding 711b and a magnetic core 720b. The primary winding 711a of transformer 700a includes two terminals 701a, 702a, two wire sections 731a, 732a, and a winding section 730a. The primary winding 711b of transformer 700b includes two terminals 701b and 702b, two wire sections 731b and 732b, and a winding section 730b.

[0042] Pad 510a is integrally connected to wiring pattern 501a, pads 511a and 512a are integrally connected to wiring pattern 502a, and pad 513a is integrally connected to wiring pattern 503a. Pad 510b is integrally connected to wiring pattern 501b, pads 511b and 512b are integrally connected to wiring pattern 502b, and pad 513b is integrally connected to wiring pattern 503b. Terminal 601a is connected to pad 510a, terminal 602a is connected to pad 511a, terminal 701a is connected to pad 512a, and terminal 702a is connected to pad 513a. Terminal 602b is connected to pad 510b, terminal 601b is connected to pad 511b, terminal 701b is connected to pad 512b, and terminal 702b is connected to pad 513b.

[0043] As a result, terminal 602a of inductor 600a is connected to terminal 701a of primary winding 711a via wiring pattern 502a. Also, terminal 601b of inductor 600b is connected to terminal 701b of primary winding 711b via wiring pattern 502b. In other words, inductor 600a and transformer 700a are connected in series, and inductor 600b and transformer 700b are connected in series.

[0044] Viewed in direction D0, the inductor 600a is wound clockwise from terminal 601a to terminal 602a. Specifically, viewed in direction D0, the winding portion 630a of the inductor 600a is wound clockwise from terminal 601a to terminal 602a. In Figure 7, the winding direction of the inductor 600a, i.e., the winding portion 630a, is indicated by an arrow on the inductor 600a.

[0045] Furthermore, in the direction D0, the inductor 600b is wound counterclockwise from terminal 602b towards terminal 601b. Specifically, in the direction D0, the winding portion 630b of the inductor 600b is wound counterclockwise from terminal 602b towards terminal 601b. In Figure 7, the winding direction of the inductor 600b, i.e., the winding portion 630b, is indicated by an arrow on the inductor 600b.

[0046] Furthermore, when viewing the primary winding 711a from axis C1, the primary winding 711a is wound counterclockwise from terminal 701a to terminal 702a. Axis C1 is an example of a first axis. Axis C1 is an axis that intersects the lens 212 parallel to the optical axis C0. Axis C1 intersects perpendicularly with the light-receiving surface 301 of the image sensor 300. In Figure 7, the winding direction of the primary winding 711a is indicated by an arrow on the transformer 700a.

[0047] Furthermore, viewing the primary winding 711b from axis C2, the primary winding 711b is wound clockwise from terminal 701b to terminal 702b. Axis C2 is an example of a second axis. Axis C2 is an axis that intersects the lens 212 parallel to the optical axis C0. Axis C2 intersects perpendicularly to the light-receiving surface 301 of the image sensor 300. In Figure 7, the winding direction of the primary winding 711b is indicated by an arrow on the transformer 700b.

[0048] As shown in Figure 6, in the direction D0, the inductor 600a, transformer 700a, transformer 700b, and inductor 600b are arranged in this order in the circumferential direction E0. In this embodiment, in the direction D0, the inductor 600a, transformer 700a, transformer 700b, and inductor 600b are arranged in this order in a counterclockwise direction E1.

[0049] Furthermore, with respect to direction D0, inductor 600a and transformer 700a are arranged adjacent to each other in the circumferential direction E0, and inductor 600b and transformer 700b are arranged adjacent to each other in the circumferential direction E0. Moreover, with respect to direction D0, transformer 700a and transformer 700b are arranged adjacent to each other in the circumferential direction E0.

[0050] Inside the inductor 600a, a magnetic flux B1 is generated in a direction D1 parallel to direction D0 by the current supplied to the inductor 600a. Direction D1 is an example of a second direction. Magnetic flux B1 is an example of a first magnetic flux.

[0051] Inside inductor 600b, a magnetic flux B2 is generated in direction D2, opposite to direction D1, by the current supplied to inductor 600b. Direction D2 is an example of a third direction. Magnetic flux B2 is an example of a second magnetic flux.

[0052] Inside the primary winding 711a, a magnetic flux B3 is generated in direction D3, perpendicular to direction D1, by the current supplied to the primary winding 711a. Direction D3 is an example of a fourth direction. Magnetic flux B3 is an example of a third magnetic flux. Looking at it in direction D0, axis C1 lies on the extension of magnetic flux B3. That is, the winding axis (central axis) of the primary winding 711a intersects axis C1.

[0053] Inside the primary winding 711b, a magnetic flux B4 is generated in direction D4, opposite to direction D3, by the current supplied to the primary winding 711b. Direction D4 is an example of a fifth direction. Magnetic flux B4 is an example of a fourth magnetic flux. Looking at it in direction D0, axis C2 lies on the extension of magnetic flux B4. That is, the winding axis (central axis) of the primary winding 711b intersects axis C2.

[0054] Here, the drive currents IA and IB shown in Figure 3 are alternating currents. The directions D1 to D4 shown in Figures 6 and 7 illustrate the case when the drive currents IA and IB are positive, that is, when drive current IA flows from terminal A10 to terminal A20 and drive current IB flows from terminal B10 to terminal B20. Therefore, when drive current IA is negative, that is, when drive current IA flows from terminal A20 to terminal A10, the direction D1 of magnetic flux B1 and the direction D3 of magnetic flux B3 are opposite to the direction of the arrows shown in Figures 6 and 7. Similarly, when drive current IB is negative, that is, when drive current IB flows from terminal B20 to terminal B10, the direction D2 of magnetic flux B2 and the direction D4 of magnetic flux B4 are opposite to the direction of the arrows shown in Figures 6 and 7.

[0055] Terminal A10 of the drive circuit 30 is electrically connected to terminal 601a of the inductor 600a, terminal 602a of the inductor 600a is electrically connected to terminal 701a of the transformer 700a, and terminal 702a of the transformer 700a is electrically connected to terminal A20 of the drive circuit 30. Therefore, the A-phase drive current IA output from terminal A10 of the drive circuit 30 flows through the wiring pattern 501a, pad 510a, terminal 601a, wire section 631a, winding section 630a, wire section 632a, terminal 602a, pad 511a, wiring pattern 502a, pad 512a, terminal 701a, wire section 731a, winding section 730a, wire section 732a, terminal 702a, pad 513a, and wiring pattern 503a in that order before flowing to terminal A20 of the drive circuit 30. At this time, the drive current IA of phase A flows clockwise when viewed from the component surface of the winding 630a, i.e., in the Z2 direction. Also, the drive current IA of phase A flows counterclockwise when viewed from the Y2 direction of the winding 730a.

[0056] Terminal B10 of the drive circuit 30 is electrically connected to terminal 602b of the inductor 600b, terminal 601b of the inductor 600b is electrically connected to terminal 701b of the transformer 700b, and terminal 702b of the transformer 700b is electrically connected to terminal B20 of the drive circuit 30. Therefore, the B-phase drive current IB output from terminal B10 of the drive circuit 30 flows through the wiring pattern 501b, pad 510b, terminal 602b, wire section 632b, winding section 630b, wire section 631b, terminal 601b, pad 511b, wiring pattern 502b, pad 512b, terminal 701b, wire section 731b, winding section 730b, wire section 732b, terminal 702b, pad 513b, and wiring pattern 503b in that order before flowing to terminal B20 of the drive circuit 30. At this time, the drive current IB of phase B flows counterclockwise when viewed from the component surface of winding 630b, i.e., in the Z2 direction. Also, the drive current IB of phase B flows clockwise when viewed from the Y2 direction of winding 730b.

[0057] Figure 8 is a side view of the components illustrating the magnetic flux leaking from the inductor 600a and transformer 700a according to the embodiment. At the center of the inductor 600a, i.e., the center of the winding portion 630a, a magnetic flux B1 is generated in direction D1. In Figure 8, direction D1 is the Z2 direction. In Figure 8, the dashed line represents the leakage magnetic field 640a from the inductor 600a. At the center of the primary winding 711a of the transformer 700a, i.e., the center of the winding portion 730a, a magnetic flux B3 is generated in direction D3. In Figure 8, direction D3 is the Y1 direction. In Figure 8, the dashed line represents the leakage magnetic field 740a from the transformer 700a.

[0058] In this embodiment, the image sensor 300 is a faulty circuit. When a magnetic field is incident on the light-receiving surface 301 of the image sensor 300 from the X and Y directions, distortion is likely to occur in the captured image. For this reason, in this embodiment, the inductor 600a and the transformer 700a are mounted on the printed circuit board 250 so that the leakage magnetic fields generated by the inductor 600a and the transformer 700a cancel each other out at the light-receiving surface 301 of the image sensor 300.

[0059] In the digital camera 1000, the transformer 700a mounted on the printed circuit board 250 in the lens barrel 200 and the image sensor 300 in the camera body 100 are spaced apart in the Y and Z directions. As a result, the leakage magnetic field 740a from the transformer 700a bends on its way to the image sensor 300. Therefore, at the light-receiving surface 301 of the image sensor 300, the leakage magnetic field 740a includes components in the Y direction and the Z direction.

[0060] On the other hand, the leakage magnetic field 640a from the inductor 600a also bends on its way to the image sensor 300. Therefore, at the light-receiving surface 301 of the image sensor 300, the leakage magnetic field 640a includes both a Y-direction component and a Z-direction component.

[0061] In this embodiment, at the light-receiving surface 301, the Y-direction component of the leakage magnetic field 640a is in the opposite direction to the Y-direction component of the leakage magnetic field 740a, and the Y-direction components of the leakage magnetic field 640a and 740a cancel each other out.

[0062] Furthermore, the inductor 600a and the transformer 700a are connected in series. Therefore, the same current flows through the winding section 630a and the winding section 730a. Even if the leakage magnetic field 640a fluctuates due to a change in the current flowing through the winding section 630a for some reason, the current flowing through the winding section 730a will also fluctuate accordingly, and the leakage magnetic field 740a will fluctuate as well. Consequently, the Y-direction component of the leakage magnetic field 640a reaching the light-receiving surface 301 and the Y-direction component of the leakage magnetic field 740a will cancel each other out.

[0063] Figure 9 is a side view of the components illustrating the magnetic flux leaking from the inductor 600b and transformer 700b according to the embodiment. At the center of the inductor 600b, i.e., the center of the winding portion 630b, a magnetic flux B2 is generated in direction D2. In Figure 9, direction D2 is the Z1 direction. In Figure 9, the dashed line represents the leakage magnetic field 640b from the inductor 600b. At the center of the primary winding 711b of the transformer 700b, i.e., the center of the winding portion 730b, a magnetic flux B4 is generated in direction D4. In Figure 9, direction D4 is the Y2 direction. In Figure 9, the dashed line represents the leakage magnetic field 740b from the transformer 700b.

[0064] In this embodiment, at the light-receiving surface 301, the Y-direction component of the leakage magnetic field 640b is in the opposite direction to the Y-direction component of the leakage magnetic field 740b, and the Y-direction components of the leakage magnetic field 640b and 740b cancel each other out.

[0065] Furthermore, the inductor 600b and the transformer 700b are connected in series. Therefore, the same current flows through the winding section 630b and the winding section 730b. Even if the leakage magnetic field 640b fluctuates due to a change in the current flowing through the winding section 630b for some reason, the current flowing through the winding section 730b will also fluctuate accordingly, and the leakage magnetic field 740b will fluctuate as well. Consequently, the Y-direction component of the leakage magnetic field 640b reaching the light-receiving surface 301 and the Y-direction component of the leakage magnetic field 740b will cancel each other out.

[0066] Furthermore, the combined magnetic field of the Y-direction components of the leakage magnetic field 640a and 740a at the light-receiving surface 301 is in the opposite direction to the combined magnetic field of the Y-direction components of the leakage magnetic field 640b and 740b at the light-receiving surface 301. As a result, the combined magnetic field of the Y-direction components of the leakage magnetic field 640a and 740a at the light-receiving surface 301 cancels out the combined magnetic field of the Y-direction components of the leakage magnetic field 640b and 740b at the light-receiving surface 301.

[0067] As described above, the leakage magnetic field of inductor 600a and the leakage magnetic field of transformer 700a in phase A cancel each other out on the image sensor 300, and the leakage magnetic field of inductor 600b and the leakage magnetic field of transformer 700b in phase B also cancel each other out on the image sensor 300. Furthermore, the combined leakage magnetic field of phase A and the combined leakage magnetic field of phase B cancel each other out. Due to these effects, the magnetic field noise reaching the image sensor 300 is reduced, and the quality of the image generated by the image sensor 300 is improved.

[0068] The phase difference between the drive current IA of phase A and the drive current IB of phase B is between -90 degrees and 90 degrees. Let Ba be the magnetic field value of the leakage magnetic field 740a of transformer 700a at the light-receiving surface 301, and Bb be the magnetic field value of the leakage magnetic field 740b of transformer 700b at the light-receiving surface 301. If terminal 701a of transformer 700a and terminal 701b of transformer 700b are mounted in the same orientation relative to the image sensor 300, then Bab = Ba + Bb, where Bab is the maximum value of the combined magnetic field.

[0069] Terminals 701a of transformer 700a and 701b of transformer 700b are mounted in opposite directions relative to the image sensor 300. In this case, when the phase difference between the A-phase drive current IA and the B-phase drive current IB is 0 degrees, Bab = |Ba - Bb|, and when the phase difference is ±90 degrees, the following equation (1) is obtained.

number

[0070] Therefore, mounting the terminals 701a of transformer 700a and 701b of transformer 700b in opposite directions relative to the image sensor 300 reduces the magnetic field on the light-receiving surface 301 compared to mounting them in the same direction.

[0071] Figure 10 is a component view showing the direction of magnetic flux leakage from inductors 600a, 600b and transformers 700a, 700b according to this embodiment. Here, the leakage magnetic field generated in each transformer 700a, 700b is stronger than the leakage magnetic field generated in each inductor 600a, 600b. In view of direction D0, it is preferable that inductors 600a, transformers 700a, transformers 700b, and inductor 600b are arranged in this order in the circumferential direction E0. That is, in view of direction D0, it is preferable that transformers 700a and 700b are adjacent to each other in the circumferential direction E0. In this embodiment, since the leakage magnetic fields 740a and 740b are in close proximity, the cancellation effect between the leakage magnetic fields 740a and 740b is enhanced on the light-receiving surface 301 of the image sensor 300, further improving the image quality.

[0072] Furthermore, it is preferable that the winding axis of each primary winding 711a and 711b, that is, the central axis passing through the center of each primary winding 711a and 711b, intersects with the axis that extends parallel to the optical axis C0 and intersects with the light-receiving surface 301a of the image sensor 300. In other words, it is preferable that, in the direction D0, the winding axis of each primary winding 711a and 711b intersects with the image sensor 300, that is, with respect to the lens 212. The reason for this is as follows: The drive module 500, including the transformers 700a and 700b, is spaced L2 apart from the image sensor 300. Therefore, if, in the direction D0, the winding axis of each transformer 700a and 700b does not intersect with the lens 212, the leakage magnetic field 740a intersects with the leakage magnetic field 640a at the light-receiving surface 301, and the leakage magnetic field 740b intersects with the leakage magnetic field 640b at the light-receiving surface 301. As a result, the magnetic field cancellation effect is reduced.

[0073] Note that the wiring pattern 550, inductors 600a and 600b, and transformers 700a and 700b may be placed at any position in the circumferential direction E0 on the printed circuit board 250, as long as their relative positions as viewed from the optical axis C0 are as shown in Figure 10.

[0074] [Examples] The experimental results for Example 1 and Comparative Examples 1-3 will be described below. Example 1 corresponds to the embodiment described above. Comparative Examples 1-3 used the same mounting components as Example 1, namely inductors 600a and 600b and transformers 700a and 700b. Therefore, the mounting components and wiring patterns will be explained with reference to Figure 7.

[0075] In Example 1 and Comparative Examples 1-3, terminal 701a is connected to pad 512a, terminal 702a to pad 513a, terminal 701b to pad 512b, and terminal 702b to pad 513b. Assuming the arrangement of the two transformers 700a and 700b is fixed in this way, there are four possible mounting methods for the inductors 600a and 600b, which are positioned on either side of the transformers 700a and 700b. One of these four patterns is Example 1, and the others are Comparative Examples 1-3.

[0076] Figure 11 is a schematic diagram showing the component arrangement of Comparative Example 1. In Comparative Example 1, terminal 601a is joined to pad 510a, terminal 602a to pad 511a, terminal 601b to pad 510b, and terminal 602b to pad 511b.

[0077] Specifically, in phase A, terminal A10 of the drive circuit 30 and terminal 601a of the inductor 600a are electrically connected by a wiring pattern not shown. Also, terminal 602a of the inductor 600a and terminal 701a of the transformer 700a are electrically connected by a wiring pattern not shown. Furthermore, terminal 702a of the transformer 700a and terminal A20 of the drive circuit 30 are electrically connected by a wiring pattern not shown.

[0078] Furthermore, in phase B, terminal B10 of the drive circuit 30 and terminal 601b of the inductor 600b are electrically connected by a wiring pattern not shown. Also, terminal 602b of the inductor 600b and terminal 701b of the transformer 700b are electrically connected by a wiring pattern not shown. Furthermore, terminal 702b of the transformer 700b and terminal B20 of the drive circuit 30 are electrically connected by a wiring pattern not shown.

[0079] Figure 12 is a schematic diagram showing the component arrangement of Embodiment 1. In Embodiment 1, terminal 601a is joined to pad 510a, terminal 602a to pad 511a, terminal 602b to pad 510b, and terminal 601b to pad 511b.

[0080] Specifically, in phase A, terminal A10 of the drive circuit 30 and terminal 601a of the inductor 600a are electrically connected by a wiring pattern not shown. Also, terminal 602a of the inductor 600a and terminal 701a of the transformer 700a are electrically connected by a wiring pattern not shown. Furthermore, terminal 702a of the transformer 700a and terminal A20 of the drive circuit 30 are electrically connected by a wiring pattern not shown.

[0081] Furthermore, in phase B, terminal B10 of the drive circuit 30 and terminal 602b of the inductor 600b are electrically connected by a wiring pattern not shown. Also, terminal 601b of the inductor 600b and terminal 701b of the transformer 700b are electrically connected by a wiring pattern not shown. Furthermore, terminal 702b of the transformer 700b and terminal B20 of the drive circuit 30 are electrically connected by a wiring pattern not shown.

[0082] Figure 13 is a schematic diagram showing the component arrangement of Comparative Example 2. In Comparative Example 2, terminal 601a is joined to pad 511a, terminal 602a to pad 510a, terminal 601b to pad 511b, and terminal 602b to pad 510b.

[0083] Specifically, in phase A, terminal A10 of the drive circuit 30 and terminal 602a of the inductor 600a are electrically connected by a wiring pattern not shown. Also, terminal 601a of the inductor 600a and terminal 701a of the transformer 700a are electrically connected by a wiring pattern not shown. Furthermore, terminal 702a of the transformer 700a and terminal A20 of the drive circuit 30 are electrically connected by a wiring pattern not shown.

[0084] Furthermore, in phase B, terminal B10 of the drive circuit 30 and terminal 602b of the inductor 600b are electrically connected by a wiring pattern not shown. Also, terminal 601b of the inductor 600b and terminal 701b of the transformer 700b are electrically connected by a wiring pattern not shown. Furthermore, terminal 702b of the transformer 700b and terminal B20 of the drive circuit 30 are electrically connected by a wiring pattern not shown.

[0085] Figure 14 is a schematic diagram showing the component arrangement of Comparative Example 3. In Comparative Example 3, terminal 601a is joined to pad 511a, terminal 602a to pad 510a, terminal 601b to pad 510b, and terminal 602b to pad 511b.

[0086] Specifically, in phase A, terminal A10 of the drive circuit 30 and terminal 602a of the inductor 600a are electrically connected by a wiring pattern not shown. Also, terminal 601a of the inductor 600a and terminal 701a of the transformer 700a are electrically connected by a wiring pattern not shown. Furthermore, terminal 702a of the transformer 700a and terminal A20 of the drive circuit 30 are electrically connected by a wiring pattern not shown.

[0087] In phase B, terminal B10 of the drive circuit 30 and terminal 601b of the inductor 600b are electrically connected by a wiring pattern not shown. Also, terminal 602b of the inductor 600b and terminal 701b of the transformer 700b are electrically connected by a wiring pattern not shown. Furthermore, terminal 702b of the transformer 700b and terminal B20 of the drive circuit 30 are electrically connected by a wiring pattern not shown.

[0088] For the 600a and 600b inductors, SHP0420P-F100NAP manufactured by Tokyo Coil Engineering Co., Ltd. were used. For the 700a and 700b transformers, TTRN-038S-081-T manufactured by Tokyo Coil Engineering Co., Ltd. were used. A rectangular voltage with a duty cycle of 50% was applied to both phase A and phase B, and the current flowing through the primary windings of transformers 700a and 700b was adjusted to an effective value of 130mA. Instead of a drive motor, a 470pF capacitor and a 47kΩ resistor were connected in parallel to the secondary windings of transformers 700a and 700b.

[0089] Figure 15 is a graph showing the experimental results for Example 1 and Comparative Examples 1-3. Figure 15 illustrates the maximum magnetic field values ​​that reached the light-receiving surface 301 in both the X and Y directions, which are parallel to the light-receiving surface 301. More specifically, the maximum magnetic field value in the X direction was measured when the phase difference between the drive current of phase A and the drive current of phase B was 0 degrees, and the maximum magnetic field value in the X direction was measured when the phase difference was 90 degrees. The larger of these values ​​was used as the maximum magnetic field value in the X direction and is shown in the graph in Figure 15. In addition, the maximum magnetic field value in the Y direction was measured when the phase difference between the drive current of phase A and the drive current of phase B was 0 degrees, and the maximum magnetic field value in the Y direction was measured when the phase difference was 90 degrees. The larger of these values ​​was used as the maximum magnetic field value in the Y direction and is shown in the graph in Figure 15.

[0090] From the experimental results shown in Figure 15, it was found that in Example 1, the maximum value of the magnetic field reaching the light-receiving surface 301 was reduced in both the X and Y directions compared to Comparative Examples 1 to 3.

[0091] [Differentiation] Figures 16(a) to 16(c) and 17(a) to 17(d) are schematic diagrams showing the component arrangements of modified examples 1 to 7. As shown in modified examples 1 to 7 in Figures 16(a) to 16(c) and 17(a) to 17(d), the wiring connections are the same as in the embodiment shown in Figure 6, but the circumferential arrangement of the inductors 600a and 600b and the transformers 700a and 700b may be different.

[0092] In the modified example 1 of Figure 16(a), when viewed in direction D0, the transformer 700a, inductor 600a, transformer 700b, and inductor 600b are arranged in this order in a counterclockwise direction E1.

[0093] In modified example 2 of Figure 16(b), when viewed in direction D0, the inductor 600a, transformer 700a, inductor 600b, and transformer 700b are arranged in this order in a counterclockwise direction E1.

[0094] In the modified example 3 of Figure 16(c), when viewed in direction D0, the transformer 700a, inductor 600a, inductor 600b, and transformer 700b are arranged in this order in a counterclockwise direction E1.

[0095] In modified example 4 of Figure 17(a), when viewed in direction D0, the inductor 600b, transformer 700b, transformer 700a, and inductor 600a are arranged in this order in a counterclockwise direction E1.

[0096] In modified example 5 of Figure 17(b), the transformer 700b, inductor 600b, transformer 700a, and inductor 600a are arranged in this order in a counterclockwise direction E1 when viewed in direction D0.

[0097] In the modified example 6 of Figure 17(c), the inductor 600b, transformer 700b, inductor 600a, and transformer 700a are arranged in this order in a counterclockwise direction E1 when viewed in direction D0.

[0098] In modified example 7 of Figure 17(d), the transformer 700b, inductor 600b, inductor 600a, and transformer 700a are arranged in this order in a counterclockwise direction E1 when viewed in direction D0.

[0099] The present invention is not limited to the embodiments described above, and many modifications are possible within the technical concept of the present invention. Furthermore, the effects described in the embodiments are merely a list of the most preferred effects resulting from the present invention, and the effects of the present invention are not limited to those described in the embodiments.

[0100] In the embodiments described above, the case in which the lens barrel 200 is detachable from the camera body 100 was explained, but the present invention is not limited to this. The present invention is also applicable to digital cameras in which the lens and drive module are provided on the camera body.

[0101] Furthermore, although the above-described embodiment described a case where the electrical module is a drive module 500 that drives the drive motor 50, the present invention is not limited to this. The present invention is applicable to any imaging device having an electrical module configured to supply power to a load.

[0102] Furthermore, although the above-described embodiment described the case where the imaging device is a digital camera, the present invention is not limited to this. For example, the present invention can also be applied to imaging devices such as smartphones, tablet PCs, and game consoles, which are mobile communication devices and wearable devices.

[0103] The above disclosures of embodiments include the following configurations and methods.

[0104] (Composition 1) Image sensor and Lens and, The system comprises an electrical module located outside the lens when viewed in a first direction along the optical axis of the lens, The aforementioned electrical module is A first inductor including a first terminal and a second terminal, A first transformer having a first primary winding including a third terminal and a fourth terminal, A second inductor including the 5th and 6th terminals, A second transformer having a second primary winding including terminals 7 and 8, The second terminal of the first inductor is connected to the third terminal of the first primary winding. The fifth terminal of the second inductor is connected to the seventh terminal of the second primary winding. Viewed in the first direction, the first inductor is wound clockwise from the first terminal toward the second terminal. Viewed in the first direction, the second inductor is wound counterclockwise from the sixth terminal toward the fifth terminal. Viewing the first primary winding from a first axis parallel to the optical axis and intersecting the lens, the first primary winding is wound counterclockwise from the third terminal to the fourth terminal. Viewing the second primary winding from a second axis parallel to the optical axis and intersecting the lens, the second primary winding is wound clockwise from the seventh terminal to the eighth terminal. An imaging device characterized by the following features.

[0105] (Configuration 2) Viewed in the first direction, the first inductor is positioned adjacent to the first transformer in the circumferential direction of the lens, and the second inductor is positioned adjacent to the second transformer in the circumferential direction. The imaging apparatus according to configuration 1, characterized by the features described above.

[0106] (Composition 3) Viewed in the first direction, the first inductor, the first transformer, the second transformer, and the second inductor are arranged in this order in the circumferential direction. The imaging apparatus according to configuration 2, characterized in that...

[0107] (Composition 4) Inside the first inductor, a first magnetic flux is generated in a second direction parallel to the first direction by the current supplied to the first inductor. Inside the second inductor, a second magnetic flux is generated in a third direction opposite to the second direction by the current supplied to the second inductor. An imaging apparatus according to any one of configurations 1 to 3, characterized by the above.

[0108] (Composition 5) Inside the first primary winding, a third magnetic flux is generated in a fourth direction perpendicular to the first direction by the current supplied to the first primary winding. Inside the second primary winding, a fourth magnetic flux is generated in a fifth direction opposite to the fourth direction by the current supplied to the second primary winding. An imaging apparatus according to any one of configurations 1 to 4, characterized by the above.

[0109] (Composition 6) The aforementioned electrical module is The circuit has a first alternating current supplied to the first inductor and the first primary winding, and a second alternating current supplied to the second inductor and the second primary winding. An imaging apparatus according to any one of configurations 1 to 5, characterized by the above.

[0110] (Composition 7) The phase difference between the phase of the first alternating current and the phase of the second alternating current is between -90 degrees and 90 degrees. The imaging apparatus according to configuration 6, characterized in that...

[0111] (Composition 8) The distance between the first transformer and the second transformer is narrower than the distance between the electrical module and the image sensor. An imaging apparatus according to any one of configurations 1 to 7, characterized by the above.

[0112] (Composition 9) The aforementioned electrical module is The device has a wiring board on which the first inductor, the second inductor, the first transformer, and the second transformer are mounted. An imaging apparatus according to any one of configurations 1 to 8, characterized by the above.

[0113] (Composition 10) The first inductor, the second inductor, the first transformer, and the second transformer are mounted on the first main surface of the wiring board. The imaging apparatus according to configuration 9, characterized by the features described herein.

[0114] (Composition 11) The lens is driven by a drive motor, The electrical module is configured to supply power to the drive motor. An imaging apparatus according to any one of configurations 1 to 10, characterized in that

[0115] (Composition 12) The first transformer has a first secondary winding that outputs a voltage obtained by boosting the voltage applied to the first primary winding, The second transformer has a second secondary winding that outputs a voltage obtained by boosting the voltage applied to the second primary winding. An imaging apparatus according to any one of configurations 1 to 11, characterized by the features described herein.

[0116] (Composition 13) The image sensor is provided inside the housing of the imaging device body. The electrical module and the lens are provided inside the housing of a lens barrel that is detachable from the main body of the imaging device. An imaging apparatus according to any one of configurations 1 to 12, characterized by the features described herein.

[0117] (Composition 14) The imaging device body and The imaging device body is equipped with a lens barrel that can be attached to or removed from it, The aforementioned lens barrel is Lens and, The system comprises an electrical module located outside the lens when viewed in a first direction along the optical axis of the lens, The aforementioned electrical module is A first inductor including a first terminal and a second terminal, A first transformer having a first primary winding including a third terminal and a fourth terminal, A second inductor including the 5th and 6th terminals, A second transformer having a second primary winding including terminals 7 and 8, The second terminal of the first inductor is connected to the third terminal of the first primary winding. The fifth terminal of the second inductor is connected to the seventh terminal of the second primary winding. Viewed in the first direction, the first inductor is wound clockwise from the first terminal toward the second terminal. Viewed in the first direction, the second inductor is wound counterclockwise from the sixth terminal toward the fifth terminal. Viewing the first primary winding from a first axis parallel to the optical axis and intersecting the lens, the first primary winding is wound counterclockwise from the third terminal to the fourth terminal. Viewing the second primary winding from a second axis parallel to the optical axis and intersecting the lens, the second primary winding is wound clockwise from the seventh terminal to the eighth terminal. An imaging device characterized by the following features.

[0118] (Composition 15) A lens barrel that can be attached to and detached from the main body of the imaging device, Lens and, The system comprises an electrical module located outside the lens when viewed in a first direction along the optical axis of the lens, The aforementioned electrical module is A first inductor including a first terminal and a second terminal, A first transformer having a first primary winding including a third terminal and a fourth terminal, A second inductor including the 5th and 6th terminals, A second transformer having a second primary winding including terminals 7 and 8, The second terminal of the first inductor is connected to the third terminal of the first primary winding. The fifth terminal of the second inductor is connected to the seventh terminal of the second primary winding. Viewed in the first direction, the first inductor is wound clockwise from the first terminal toward the second terminal. Viewed in the first direction, the second inductor is wound counterclockwise from the sixth terminal toward the fifth terminal. Viewing the first primary winding from a first axis parallel to the optical axis and intersecting the lens, the first primary winding is wound counterclockwise from the third terminal to the fourth terminal. Viewing the second primary winding from a second axis parallel to the optical axis and intersecting the lens, the second primary winding is wound clockwise from the seventh terminal to the eighth terminal. A lens barrel characterized by the following features. [Explanation of Symbols]

[0119] 100...Camera body (imaging device body), 200...Lens barrel, 212...Lens, 300...Image sensor, 301...Light receiving surface, 500...Drive module (electrical module), 600a...Inductor (first inductor), 600b...Inductor (second inductor), 601a...Terminal (first terminal), 601b...Terminal (fifth terminal), 602a...Terminal (second terminal), 602b...Terminal (sixth terminal), 700a...T Lance (first transformer), 700b... Transformer (second transformer), 701a... Terminal (third terminal), 701b... Terminal (seventh terminal), 702a... Terminal (fourth terminal), 702b... Terminal (eighth terminal), 711a... Primary winding (first primary winding), 711b... Primary winding (second primary winding), 712a... Secondary winding (first secondary winding), 712b... Secondary winding (second secondary winding), 1000... Digital camera (imaging device)

Claims

1. Image sensor and Lens and, The system comprises an electrical module located outside the lens when viewed in a first direction along the optical axis of the lens, The aforementioned electrical module is A first inductor including a first terminal and a second terminal, A first transformer having a first primary winding including a third terminal and a fourth terminal, A second inductor including the fifth and sixth terminals, A second transformer having a second primary winding including terminals 7 and 8, The second terminal of the first inductor is connected to the third terminal of the first primary winding. The fifth terminal of the second inductor is connected to the seventh terminal of the second primary winding. Viewed in the first direction, the first inductor is wound clockwise from the first terminal toward the second terminal. Viewed in the first direction, the second inductor is wound counterclockwise from the sixth terminal toward the fifth terminal. Viewing the first primary winding from a first axis parallel to the optical axis and intersecting the lens, the first primary winding is wound counterclockwise from the third terminal to the fourth terminal. Viewing the second primary winding from a second axis parallel to the optical axis and intersecting the lens, the second primary winding is wound clockwise from the seventh terminal to the eighth terminal. An imaging device characterized by the following features.

2. Viewed in the first direction, the first inductor is arranged adjacent to the first transformer in the circumferential direction of the lens, and the second inductor is arranged adjacent to the second transformer in the circumferential direction. The imaging apparatus according to feature 1.

3. Viewed in the first direction, the first inductor, the first transformer, the second transformer, and the second inductor are arranged in this order in the circumferential direction. The imaging apparatus according to feature 2.

4. Inside the first inductor, a first magnetic flux is generated in a second direction parallel to the first direction by the current supplied to the first inductor. Inside the second inductor, a second magnetic flux is generated in a third direction opposite to the second direction by the current supplied to the second inductor. The imaging apparatus according to feature 1.

5. Inside the first primary winding, a third magnetic flux is generated in a fourth direction perpendicular to the first direction by the current supplied to the first primary winding. Inside the second primary winding, a fourth magnetic flux is generated in a fifth direction opposite to the fourth direction by the current supplied to the second primary winding. The imaging apparatus according to feature 1.

6. The aforementioned electrical module is The circuit has a first alternating current supplied to the first inductor and the first primary winding, and a second alternating current supplied to the second inductor and the second primary winding. The imaging apparatus according to feature 1.

7. The phase difference between the phase of the first alternating current and the phase of the second alternating current is between -90 degrees and 90 degrees. The imaging device according to feature 6.

8. The distance between the first transformer and the second transformer is narrower than the distance between the electrical module and the image sensor. The imaging apparatus according to feature 1.

9. The aforementioned electrical module is The first inductor, the second inductor, the first transformer, and the second transformer are mounted on a wiring board, The imaging apparatus according to feature 1.

10. The first inductor, the second inductor, the first transformer, and the second transformer are mounted on the first main surface of the wiring board. The imaging apparatus according to feature 9.

11. The lens is driven by a drive motor, The electrical module is configured to supply power to the drive motor. The imaging apparatus according to feature 1.

12. The first transformer has a first secondary winding that outputs a voltage obtained by boosting the voltage applied to the first primary winding, The second transformer has a second secondary winding that outputs a voltage obtained by boosting the voltage applied to the second primary winding. The imaging apparatus according to feature 1.

13. The image sensor is provided inside the housing of the imaging device body. The electrical module and the lens are provided inside the housing of a lens barrel that is detachable from the main body of the imaging device. The imaging apparatus according to any one of claims 1 to 12.

14. The imaging device body and The imaging device body is equipped with a lens barrel that can be attached to or removed from it, The aforementioned lens barrel is Lens and, The system comprises an electrical module located outside the lens when viewed in a first direction along the optical axis of the lens, The aforementioned electrical module is A first inductor including a first terminal and a second terminal, A first transformer having a first primary winding including a third terminal and a fourth terminal, A second inductor including the fifth and sixth terminals, A second transformer having a second primary winding including terminals 7 and 8, The second terminal of the first inductor is connected to the third terminal of the first primary winding. The fifth terminal of the second inductor is connected to the seventh terminal of the second primary winding. Viewed in the first direction, the first inductor is wound clockwise from the first terminal toward the second terminal. Viewed in the first direction, the second inductor is wound counterclockwise from the sixth terminal toward the fifth terminal. Viewing the first primary winding from a first axis parallel to the optical axis and intersecting the lens, the first primary winding is wound counterclockwise from the third terminal to the fourth terminal. Viewing the second primary winding from a second axis parallel to the optical axis and intersecting the lens, the second primary winding is wound clockwise from the seventh terminal to the eighth terminal. An imaging device characterized by the following features.

15. A lens barrel that can be attached to and detached from the main body of the imaging device, Lens and, The system comprises an electrical module located outside the lens when viewed in a first direction along the optical axis of the lens, The aforementioned electrical module is A first inductor including a first terminal and a second terminal, A first transformer having a first primary winding including a third terminal and a fourth terminal, A second inductor including the fifth and sixth terminals, A second transformer having a second primary winding including terminals 7 and 8, The second terminal of the first inductor is connected to the third terminal of the first primary winding. The fifth terminal of the second inductor is connected to the seventh terminal of the second primary winding. Viewed in the first direction, the first inductor is wound clockwise from the first terminal toward the second terminal. Viewed in the first direction, the second inductor is wound counterclockwise from the sixth terminal toward the fifth terminal. Viewing the first primary winding from a first axis parallel to the optical axis and intersecting the lens, the first primary winding is wound counterclockwise from the third terminal to the fourth terminal. Viewing the second primary winding from a second axis parallel to the optical axis and intersecting the lens, the second primary winding is wound clockwise from the seventh terminal to the eighth terminal. A lens barrel characterized by the following features.

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