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

Abstract

This lens driving device is provided with a movable part, a driving part, a magnet part having a first pole and a second pole, and a position detection part that is disposed to face the magnet part, and detects the position of the magnet part by detecting a magnetic field on a plane including an optical axis direction and a width direction. A boundary extends while bending such that the angle formed with the optical axis direction changes.

Description

[Technical field]

[0001] The present invention relates to a lens driving device, a camera module, and a camera-mounted device. [Background technology]

[0002] Conventionally, camera modules mounted on thin camera-mounted devices such as smartphones have been known. Such camera modules are known to include a lens drive device having a zoom function for enlarging or reducing a subject image.

[0003] For example, Patent Document 1 discloses a configuration including a fixed lens onto which light from a subject is incident, two movable lenses onto which light bent by the fixed lens is incident, and a lens drive unit that moves the two movable lenses in the direction of the optical axis.

[0004] In such a lens driving device, in order to detect the position of the movable lens in the direction of the optical axis, a magnet section and a position detection section (e.g., a Hall element) that detects the magnetic flux of the magnet section are provided on a movable section on which the movable lens is provided. The magnet section is arranged, for example, with two different poles (N pole and S pole) adjacent to each other, and is arranged so that the magnetic force at the portion facing the position detection section changes depending on the position of the movable lens. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2018-36416 A Summary of the Invention [Problem to be solved by the invention]

[0006] However, for example, in a small camera-mounted device, if the position of the magnet part in the opposing direction of two different poles deviates from the desired position due to assembly errors, etc., the positional relationship with the position detection part will also be shifted, making it impossible to accurately detect the position of the movable lens.

[0007] An object of the present invention is to provide a lens driving device, a camera module, and a camera-mounted device that are capable of accurately detecting the position of a movable lens. [Means for solving the problem]

[0008] The lens driving device according to the present invention is A movable part capable of holding a movable lens; a drive unit that drives the movable unit in a direction of the optical axis; a magnet portion provided on the movable portion, extending in the direction of the optical axis, and having a first pole and a second pole arranged adjacent to each other with a boundary therebetween in a width direction perpendicular to the direction of the optical axis; a position detection unit that is disposed opposite the magnet unit and detects a position of the magnet unit by detecting a magnetic field in a plane that includes the direction of the optical axis and the width direction; Equipped with The boundary forms an angle with the optical axis direction of Depending on the position in the width direction It bends and stretches to change.

[0009] The camera module according to the present invention comprises: The lens driving device, a lens unit including the movable lens held by the movable portion; an imaging unit that captures a subject image formed by the lens unit; Equipped with The movable lens is driven in the direction of the optical axis.

[0010] The camera-mounted device according to the present invention comprises: A camera-equipped device that is an information device or a transport device, The camera module described above; an imaging control unit that processes image information obtained by the camera module; Equipped with. Effect of the Invention

[0011] According to the present invention, the position of the movable lens can be detected accurately. [Brief description of the drawings]

[0012] [Figure 1] 1 is a diagram showing a simplified view of a camera module according to an embodiment of the present invention; [Diagram 2] 1 is a diagram showing a simplified configuration of a camera module according to an embodiment of the present invention as viewed from the side; [Diagram 3] FIG. 2 is a perspective view showing a housing portion of the camera module. [Figure 4] FIG. 2 is a perspective view of the bottom wall side of the housing portion of the camera module. [Diagram 5] FIG. 2 is an exploded perspective view of a housing and a lens unit. [Figure 6] 2 is an exploded perspective view of a side wall and a bottom wall of the housing. FIG. [Figure 7] This is a view of the housing from the +Z side. [Figure 8] This is a view of the inside of the housing as seen from the negative side in the X direction. [Figure 9] FIG. [Figure 10] FIG. 2 is a diagram showing a connection portion between a lens portion and a frame. [Figure 11] FIG. 4 is an exploded perspective view of a guided portion and an interposed portion. [Figure 12A] 13A and 13B are diagrams for explaining adjustment of the positional relationship between an interposition portion and a guide shaft. [Figure 12B] 13A and 13B are diagrams for explaining adjustment of the positional relationship between an interposition portion and a guide shaft. [Figure 13] FIG. 4 is a diagram showing a second intervening member. [Figure 14] 5A and 5B are diagrams illustrating the positional relationship between an interposition portion and an ultrasonic motor. [Figure 15] FIG. 2 is a perspective view of an ultrasonic motor. [Figure 16] FIG. 2 is an exploded perspective view of the ultrasonic motor. [Figure 17] 4 is an enlarged view of a contact portion between a resonating portion and an intermediate portion. FIG. [Figure 18] 5A and 5B are diagrams for explaining a configuration of a guide portion. [Figure 19] 5A and 5B are diagrams for explaining a configuration of a guide portion. [Figure 20] FIG. 4 is a diagram showing the configuration of a magnet section. [Figure 21A] 4 is a diagram for explaining the positional relationship between a magnet and a position detector; FIG. [Figure 21B] 4 is a diagram for explaining the positional relationship between a magnet and a position detector; FIG. [Figure 21C] 4 is a diagram for explaining the positional relationship between a magnet and a position detector; FIG. [Figure 22] FIG. 13 is a diagram showing a change in magnetic flux density for each position in the Y direction of the frame. [Diagram 23] 13A and 13B are diagrams showing the configuration of a magnet section according to a modified example. [Figure 24] 13A and 13B are diagrams showing the configuration of a magnet section according to a modified example. [Diagram 25] 13A and 13B are diagrams showing the configuration of a magnet section according to a modified example. [Figure 26] 13A and 13B are diagrams showing the configuration of a magnet section according to a modified example. [Figure 27] FIG. 13 is a diagram showing a configuration having a plurality of position detection units. [Figure 28A] FIG. 1 is a diagram showing a smartphone equipped with a camera module. [Figure 28B] FIG. 1 is a diagram showing a smartphone equipped with a camera module. [Figure 29A] FIG. 1 is a diagram showing an automobile equipped with a camera module. [Figure 29B] FIG. 1 is a diagram showing an automobile equipped with a camera module. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Fig. 1 is a diagram showing a simplified configuration of a camera module 1 according to an embodiment of the present invention. Fig. 2 is a diagram showing a simplified configuration of the camera module 1 according to the present embodiment as viewed from the side.

[0014] The camera module 1 is mounted on a thin camera-mounted device such as a smartphone M (see FIGS. 28A and 28B), a mobile phone, a digital camera, a notebook computer, a tablet terminal, a portable game machine, or an in-vehicle camera.

[0015] In describing the structure of the camera module 1 of this embodiment, a Cartesian coordinate system (X, Y, Z) is used. The same Cartesian coordinate system (X, Y, Z) is used in the figures described later. When an image is actually captured by the camera-mounted device, the camera module 1 is mounted so that the X direction is the left-right direction, the Y direction is the up-down direction, and the Z direction is the front-back direction, for example. Light from a subject enters from the negative side of the Z direction (negative side), is bent, and is guided to the positive side of the Y direction (positive side). By reducing the thickness of the camera module 1 in the Z direction, the camera-mounted device can be made thinner.

[0016] As shown in FIG. 1, the camera module 1 includes a housing 10, a reflection drive unit 20, a lens unit 30, an imaging unit 40, a support shaft 50 (see FIG. 3), a lens drive unit 60 (see FIG. 5), a position detection unit 70 (see FIG. 10), and a drive control unit 100.

[0017] The drive control unit 100 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The CPU reads out a program corresponding to the processing contents from the ROM, loads it in the RAM, and centrally controls the lens drive unit 60 in cooperation with the loaded program. In this way, the drive control unit 100 drives a second lens unit 32 and a third lens unit 33 (described later) of the lens unit 30 housed in the housing 10 in the Y direction (the direction of the optical axis). As a result, the camera module 1 performs stepless optical zoom and autofocus. The housing 10, the support shaft 50, the lens drive unit 60, the position detection unit 70, and the drive control unit 100 correspond to the "lens drive device" of the present invention.

[0018] As shown in FIG. 2, in the camera module 1, incident light L1 is incident on the housing 10 via the reflection drive unit 20. The reflection drive unit 20 has a reflection housing 21, a mirror 22, and a reflection drive control unit 23. In the example shown in FIG. 1 and FIG. 2, the reflection housing 21 is disposed adjacent to the end of the housing 10 on the negative side in the Y direction. The mirror 22 is provided in the reflection housing 21, and reflects the incident light L1 toward the housing 10 as reflected light L2. The reflection drive control unit 23 includes a CPU, a ROM, a RAM, etc., and controls the orientation of the mirror 22.

[0019] Moreover, the mirror 22 according to this embodiment has two rotation axes (not shown) extending in the X direction and the Y direction. In the reflection drive unit 20, the mirror 22 rotates about the rotation axis under the control of the reflection drive control unit 23. This provides the camera module 1 with a shake correction function (OIS (Optical Image Stabilization) function) that optically corrects shake (vibration) occurring during shooting to reduce image disturbance.

[0020] The reflected light L2 incident on the housing 10 is output to the imaging section 40 via the lens section 30 housed in the housing 10.

[0021] The imaging unit 40 is disposed on an outer surface (disposition portion 112B of the second wall 112 described later) on the positive side in the Y direction of the housing 10, and is configured so that reflected light L2 is incident via the lens unit 30. The imaging unit 40 has an imaging element, a substrate, etc. (not shown).

[0022] The imaging element is composed of, for example, a CCD (Charge Coupled Device) type image sensor, a CMOS (Complementary Metal Oxide Semiconductor) type image sensor, etc. The imaging element is mounted on a substrate and electrically connected to wiring on the substrate via bonding wires. The imaging element captures an image of a subject formed by the lens unit 30, and outputs an electrical signal corresponding to the subject image.

[0023] A printed wiring board (not shown) is electrically connected to the substrate of the imaging unit 40, and power is supplied to the imaging element and an electrical signal of the subject image captured by the imaging element is output via this printed wiring board. The electrical signal is output to an imaging control unit 200 provided in the camera-mounted device. The imaging control unit 200 includes a CPU, ROM, RAM, etc., and processes image information obtained by the camera module 1. The imaging control unit 200 may be mounted on the camera-mounted device, but may also be built into the camera module 1.

[0024] 3, the housing 10 contains the lens unit 30, the support shaft 50, and the lens driving unit 60 (see also FIG. 5), and has, for example, a rectangular parallelepiped shape as a whole. The housing 10 has a side wall portion 11 and a bottom wall portion 12.

[0025] The side wall 11 is, for example, a wall made of resin that has a portion that opens to the negative side in the Y direction, and has a first wall 111, a second wall 112, a third wall 113 and a fourth wall 114 (see also FIG. 7, etc.).

[0026] The first walls 111 are configured to extend in the Y direction, and a pair are provided on both sides in the X direction. Of the pair of first walls 111, the first wall 111 on the + side in the X direction has an arrangement section 111A on the inner surface of the housing 10 where an ultrasonic motor, which will be described later, is arranged. The arrangement sections 111A are provided on both sides of the center in the Y direction of the first wall 111 on the + side in the X direction.

[0027] 4, a terminal portion 111C is provided on the first wall 111 on the positive side in the X direction. The terminal portion 111C has a terminal (not shown) that is arranged on both the inside and outside of the housing 10 via a gap formed between the first wall 111 and the bottom wall portion 12, for example. The portion of the terminal that is arranged on the outside of the housing 10 is connected to a predetermined wiring of the camera-mounted device.

[0028] Further, on the bottom surface of the first wall 111 (the surface on the negative side in the Z direction), an engaged portion 111B with which the positioning portion 121 of the bottom wall portion 12 engages is formed.

[0029] 3 and 4, the second wall 112 is configured to extend in the X direction and is provided so as to connect the ends of the pair of first walls 111 on the + side in the Y direction. Furthermore, support sections 112A that support the support shaft 50 are provided on both sides in the X direction on the top surface (the surface on the + side in the Z direction) of the second wall 112. An arrangement section 112B on which the imaging section 40 is arranged is provided on the outer surface of the second wall 112.

[0030] Further, guide support portion 112C and opening 112D are provided in arrangement portion 112B of second wall 112. In the present embodiment, guide support portion 112C is a hole that supports guide shafts 81, 82, which will be described later, and is provided on the negative side in the X direction of opening 112D in arrangement portion 112B. Two guide support portions 112C are provided side by side in the Z direction. Opening 112D is an opening into which fourth lens unit 34 of lens section 30 fits, and is provided in the center of arrangement portion 112B in the X direction.

[0031] 3 and 5, the third walls 113 are provided at each end on the negative side in the Y direction of the pair of first walls 111. The pair of third walls 113 are each provided so as to surround a space defined by the first wall 111 and the second wall 112. A gap is provided between the pair of third walls 113 to allow the first lens unit 31 of the lens section 30 to fit therein, and a bridging portion 113A is provided to bridge the ends of each third wall 113 on the negative side in the Z direction.

[0032] Moreover, a support portion 113B that supports the support shaft 50 is provided on the top surface (the surface on the positive side in the Z direction) of the pair of third walls 113. A guide support portion 113C that supports guide shafts 81, 82 described later is provided near the center of the pair of third walls 113 in the Z direction.

[0033] The guide support portion 113C is an elongated hole whose length in the Z direction corresponds to the arrangement range of the two guide support portions 112C in the second wall 112. The guide support portion 113C is capable of supporting the guide shafts 81, 82 supported by the two guide support portions 112C in the second wall 112, respectively.

[0034] 5, the fourth walls 114 form the bottom wall of a space formed by each of the first walls 111, the third walls 113 corresponding to the first walls 111, and the second walls 112, and are provided in an area corresponding to the third walls 113 in the X direction (see also FIG. 7). Therefore, a gap is provided between the fourth walls 114 on both sides in the X direction.

[0035] 4 to 6, bottom wall portion 12 is, for example, a substantially rectangular metal plate constituting the bottom wall of housing 10, and is provided so as to bridge fourth wall 114 and the pair of first walls 111 on both sides in the X direction. Bottom wall portion 12 is integrated with a bottom surface portion of side wall portion 11 including the bottom portions of the pair of first walls 111 by insert molding. Also, a portion of the end portion on the negative side in the Y direction of bottom wall portion 12 is cut out so that no part of bottom wall portion 12 is present in a portion corresponding to first lens unit 31.

[0036] Positioning portions 121 are provided on both ends in the X direction of the bottom wall portion 12. The positioning portions 121 are provided to protrude from both ends of the bottom wall portion 12 and engage with the engaged portions 111B of the first wall 111 described above. This allows the bottom wall portion 12 to be positioned in the Y direction.

[0037] 6, bent portions 122 are provided at the side ends in the X and Y directions of the bottom wall portion 12. The bent portions 122 are provided by bending the side ends toward the positive side of the Z direction.

[0038] Further, a groove (not shown) into which the bent portion 122 fits is formed in a portion of the housing 10 corresponding to the bent portion 122. The bent portion 122 fits into this groove, whereby the bottom wall portion 12 is fixed to the housing 10.

[0039] Further, a plurality of half punches 123 aligned in the Y direction are formed on the surface of the bottom wall portion 12. The half punches 123 are provided across the bottom wall portion 12 in the X direction. In this embodiment, a total of six half punches 123 are provided.

[0040] By providing the half punch 123 in this manner, the strength of the bottom wall portion of the housing 10 can be improved.

[0041] 3 and 5, the lens section 30 is provided in an area sandwiched between a pair of first walls 111, including an area through which reflected light L2 (see FIG. 2) from the reflection drive section 20 passes. The lens section 30 has a first lens unit 31, a second lens unit 32, a third lens unit 33, and a fourth lens unit 34 arranged side by side in the Y direction.

[0042] The first lens unit 31 is disposed on the most upstream side in the incident direction of the reflected light L2 (the direction toward the + side of the Y direction), and is fixed between a pair of third walls 113 of the housing .

[0043] The side surface of the first lens unit 31 is curved, for example, so that the central portion in the Z direction is convex. The side surface of the third wall 113 on the first lens unit 31 side has, for example, a shape that follows the side surface of the first lens unit 31, and is configured so that the curved portion of the first lens unit 31 fits into it. In this way, the first lens unit 31 is fixed between the pair of third walls 113.

[0044] Second lens unit 32 is disposed downstream of first lens unit 31 in the incident direction, and has a main body portion 32A and a supported portion 32B. Third lens unit 33 is disposed downstream of second lens unit 32 in the incident direction, and has a main body portion 33A and a supported portion 33B. Second lens unit 32 corresponds to the "first movable portion" of the present invention, and third lens unit 33 corresponds to the "second movable portion" of the present invention.

[0045] Each of main body portions 32A, 33A is a portion that holds a lens through which light passes after passing through first lens unit 31. Supported portions 32B, 33B are portions that are movably supported by support shaft 50, and are provided on both sides of each of main body portions 32A, 33A in the X direction.

[0046] The lens included in main body 32A of second lens unit 32 corresponds to the "first movable lens" of the present invention. The lens included in main body 33A of third lens unit 33 corresponds to the "second movable lens" of the present invention.

[0047] The fourth lens unit 34 is disposed on the most downstream side in the incident direction, and includes a lens. The fourth lens unit 34 is supported by a support shaft 50 at a position adjacent to the second wall 112 of the housing 10. In addition, as shown in Fig. 4, in this embodiment, a convex portion 34A is provided on a surface of the fourth lens unit 34 on the + side in the Y direction.

[0048] The lenses in the first to fourth lens units 31 to may be attached to the housing 10 when the lens driving device is manufactured, or may be attached to the housing 10 when the camera module 1 is manufactured from the lens driving device.

[0049] The protrusion 34A has a size that allows it to fit into the opening 112D of the second wall 112. The fourth lens unit 34 is fixed to the housing 10 by fitting the protrusion 34A into the opening 112D.

[0050] 3 and 5, the support shaft 50 is made of, for example, stainless steel. The support shaft 50 extends in the Y direction and is provided in each of the regions of the pair of third walls 113. In this embodiment, the support shafts 50 are configured to have equal lengths, and are supported by the support portion 113B of the third wall 113 and each support portion 112A of the second wall 112.

[0051] The lens driving units 60 are provided corresponding to the second lens unit 32 and the third lens unit 33, respectively, and independently move either the corresponding second lens unit 32 or the third lens unit 33 under the control of the above-mentioned drive control unit 100. The lens driving unit 60 is disposed in an area of ​​the fourth wall 114 surrounded by the first wall 111, the second wall 112, and the third wall 113 on the positive side in the X direction. That is, as shown in FIG. 7, the lens driving unit 60 is disposed on one end side of both ends of the second lens unit 32 and the third lens unit 33 of the housing 10 sandwiching the optical axis O therebetween.

[0052] In this embodiment, the two lens driving units 60 are provided side by side in the Y direction. The lens driving unit 60 on the negative side in the Y direction drives the second lens unit 32 in the Y direction, and the lens driving unit 60 on the positive side in the Y direction drives the third lens unit 33 in the Y direction. In other words, the lens driving unit 60 on the negative side in the Y direction corresponds to the "first driving unit" of the present invention, and the lens driving unit 60 on the positive side in the Y direction corresponds to the "second driving unit" of the present invention.

[0053] In this embodiment, each lens driver 60 has approximately the same configuration, and therefore in the following description, unless otherwise specified, only the lens driver 60 corresponding to the second lens unit 32 will be described, and a description of the lens driver 60 corresponding to the third lens unit 33 will be omitted. Also, in this embodiment, each lens driver 60 is disposed symmetrically in the Y direction, and therefore the relationship between the + side and - side in the Y direction in the lens driver 60 corresponding to the third lens unit 33 is opposite to the relationship between the + side and - side in the Y direction in the lens driver 60 corresponding to the second lens unit 32.

[0054] The lens driving section 60 includes a frame 61 , a connection section 62 , an interposition section 63 , an ultrasonic motor 64 , and a guide section 80 .

[0055] The frame 61 is connected to one of the supported portions 32B, 33B of the second lens unit 32 and the third lens unit 33 via a connecting portion 62.

[0056] The frame 61 on the negative side in the Y direction corresponds to the "first frame" of the present invention, and the frame 61 on the positive side in the Y direction corresponds to the "second frame" of the present invention.

[0057] The frame 61 is configured to be movable in the direction of the optical axis O by the guide portion 80 guiding the movement in the direction of the optical axis O (Y direction). When the frame 61 moves in the direction of the optical axis O, the second lens unit 32 or the third lens unit 33 connected to the frame 61 via the connection portion 62 also moves along the support shaft 50.

[0058] 8 and 9, frame 61 has guided portion 611 and magnet holding portion 612. Guided portion 611 is a portion whose movement in the Y direction on frame 61 is guided by guide portion 80, and is provided at a position in the X direction corresponding to guide portion 80. Guided portion 611 has a first portion 611A, a second portion 611B, a third portion 611C, and a fourth portion 611D.

[0059] The first portion 611A is a portion that constitutes the top surface (the surface on the positive side in the Z direction) of the frame 61, and is configured to extend in the direction of the optical axis (the Y direction). The first portion 611A is provided so as to cover the guide portion 80 from the positive side in the Z direction.

[0060] Also, a connection part 62 is provided on a surface on the + side in the Z direction of the first part 611A. As shown in Fig. 10, the connection part 62 is a plate-shaped spring member (elastic member) fixed to the + side surface in the Z direction of the frame 61 and to the - side surfaces in the Y direction of either of the supported parts 32B, 33B of the second lens unit 32 and the third lens unit 33. Since the connection part 62 is made of a spring member, even if the positional relationship between the frame 61 and the supported parts 32B, 33B is shifted due to manufacturing tolerances or the like, the shift in the positional relationship can be absorbed by the elastic force of the spring member.

[0061] As shown in Figures 8 to 10, the second part 611B extends from the negative end part in the Y direction of the first part 611A (one end part of the first part 611A) to the negative side in the Z direction (predetermined direction) and supports the first guide shaft 81 and the second guide shaft 82.

[0062] The second portion 611B has a shaft hole 611E formed therethrough in the Y direction. The shaft hole 611E is provided at a position corresponding to a first guide shaft 81, which will be described later, and the first guide shaft 81 passes through the shaft hole 611E.

[0063] Further, a shaft engaging portion 611F is formed at an end portion on the negative side in the Z direction of the second portion 611B. The shaft engaging portion 611F is provided at a position where it can engage with a second guide shaft 82, which will be described later, and engages with the second guide shaft 82 from the positive side in the Z direction.

[0064] The third portion 611C is a portion that extends from an end portion (the other end of the first portion 611A) on the positive side in the Y direction of the first portion 611A to the negative side in the Z direction and supports the second guide shaft 82. More specifically, the negative end portion of the third portion 611C in the Z direction extends to a position where a predetermined distance is provided between the third portion 611C and the second guide shaft 82.

[0065] The third portion 611C has a shaft hole 611G formed therethrough in the Y direction. The shaft hole 611G is provided at a position corresponding to the first guide shaft 81, and the first guide shaft 81 passes through the shaft hole 611G.

[0066] The fourth portion 611D extends from an end portion on the positive side in the X direction of the first portion 611A. The fourth portion 611D is provided over the entire first portion 611A in the Y direction and is disposed so as to cover the guide portion 80 from the positive side in the X direction.

[0067] In addition, an absorbing portion 613 is provided between the fourth portion 611D and the guide portion 80 (second guide shaft 82). The absorbing portion 613 is made of a spring member, and is disposed between the fourth portion 611D and the second guide shaft 82. The absorbing portion 613 biases the second guide shaft 82 toward the negative side in the X direction relative to the fourth portion 611D. In this way, the absorbing portion 613 absorbs any deviation in the positional relationship between the frame 61 and the guide portion 80.

[0068] As shown in FIGS. 10 and 11, the magnet holding portion 612 is a portion that holds the magnet portion 614 for position detection, and extends from the end portion on the negative side in the Z direction of the fourth portion 611D to the negative side in the X direction.

[0069] A recess 612A is formed at the end of magnet holding portion 612 on the negative side in the Z direction, and magnet portion 614 is held within the recess. A position detection portion 70 is provided at a portion of housing 10 facing magnet portion 614. Position detection portion 70 is a magnetoresistance effect element, and detects the position of frame 61 in the Y direction (direction of the optical axis) by detecting a magnetic field in a plane including the X direction and the Y direction. Details of magnet portion 614 and position detection by position detection portion 70 will be described later.

[0070] 10 and 11, an interposed portion 63 is provided above the magnet holding portion 612. The interposed portion 63 has a first interposed member 631 and a second interposed member 632.

[0071] The first intervening member 631 is made of, for example, a flat metal member, and is adhered to the surface on the + side in the X direction of the fourth portion 611D of the frame 61. Two protrusions D1 and D2 are provided on the surface on the + side in the X direction of the fourth portion 611D.

[0072] The two protrusions D1 and D2 protrude from the surface of the fourth portion 611D and are arranged side by side in the Y direction. In the present embodiment, the protrusion D1 is provided near the center of the fourth portion 611D in the Y direction, and the protrusion D2 is provided near the end of the fourth portion 611D on the positive side in the Y direction.

[0073] The first interposition member 631 is disposed parallel to the direction of the optical axis (Y direction), and has engagement holes 631A and 631B that engage with the two protrusions D1 and D2.

[0074] The engagement hole 631A is disposed near the center of the first intervening member 631 in the Y direction, and engages with the protrusion D1. The engagement hole 631A is formed to be engageable with the protrusion D1 and to be large enough that the intervening member 63 (first intervening member 631) can rotate around the engagement hole 631A with which the protrusion D1 is engaged.

[0075] The engagement hole 631B is disposed near the end of the first intervening member 631 on the positive side in the Y direction, and engages with the protrusion D2. The engagement hole 631B is formed to have a size that allows the engagement hole 631B to be engaged with the protrusion D2 and has a clearance that allows the inner edge of the engagement hole 631B to move relative to the protrusion D2 (see FIG. 12B).

[0076] By forming the engagement holes 631A, 631B in this manner, it becomes possible to rotate the interposed portion 63 around the engagement hole 631A (projection portion D1) within the range of the engagement hole 631B, as shown in Figures 12A and 12B. As a result, the attitude of the interposed portion 63 can be adjusted so that the contact portion 632B of the interposed portion 63 is parallel to the guide axis.

[0077] 11, the second intervening member 632 is made of, for example, a plate-shaped metal member, and is, for example, adhesively fixed to the first intervening member 631. The second intervening member 632 has a main body portion 632A and a contact portion 632B.

[0078] The main body portion 632A has a flat surface parallel to the direction of the optical axis (Y direction), and is a portion that is adhesively fixed to the first intervening member 631. The main body portion 632A is formed with holes A1 and A2 through which the two protrusions D1 and D2 of the fourth portion 611D of the frame 61 pass.

[0079] The contact portion 632B is a portion that comes into contact with the vibrator of the ultrasonic motor 64, and is configured by bending both ends in the Z direction of the main body portion 632A toward the opposite side to the lens portion. As a result, the main body portion 632A connecting the pair of contact portions 632B is disposed so as to cover the ultrasonic motor 64 from the negative side in the X direction, and the contact portion 632B is disposed so as to sandwich the ultrasonic motor 64 (resonator portion 641).

[0080] With the interposition portion 63 configured in this manner, a force acts from the vibrator of the ultrasonic motor 64 to the contact portion 632B, generating a thrust in the optical axis direction (Y direction) in the interposition portion 63. As a result, it becomes possible to apply a thrust from the interposition portion 63 to the frame 61, causing the frame 61 to move in the optical axis direction (Y direction).

[0081] 13, a plurality of openings C1, C2, C3, and C4 are formed in a connection portion 632C between the main body portion 632A and the contact portion 632B. The plurality of openings C1, C2, C3, and C4 are arranged in a line in the Y direction, four on each side of the connection portion in the Y direction.

[0082] Of the four openings C1, C2, C3, and C4, the two openings C2 and C3 at the center in the Y direction are longer in the Y direction and longer in the Z direction than the two openings C1 and C4 at both ends in the Y direction.

[0083] Furthermore, the connection portion 632C has four openings C1, C2, C3, and C4 formed therein, thereby constituting five connection sections 632D arranged at intervals in the optical axis direction.

[0084] In this embodiment, the width of each connection portion 632D in the Y direction (direction of the optical axis) becomes wider as the connection portion 632D is positioned further outward from the center in the Y direction. Specifically, the middle connection portion 632D in the Y direction is the narrowest of the five connection portions 632D. The connection portions 632D at both ends in the Y direction are the widest of the five connection portions 632D. The connection portions 632D positioned between the middle connection portion 632D and the connection portions 632D at both ends are wider than the middle connection portion 632D and narrower than the connection portions 632D at both ends.

[0085] Since the strength of connection portion 632D (connection portion 632C) decreases as it approaches the end, in this embodiment, the strength of connection portion 632C is adjusted by changing the size of openings C1, C2, C3, C4 and the width of connection portion 632D in connection portion 632C.

[0086] With the above configuration, the pressing force applied by vibrator 641B at each position of contact portion 632B can be equalized over the entire Y direction. As a result, when a stepless optical zoom function is activated in a device mounted on a mobile terminal such as a smartphone, a moving force can be stably generated by interposition portion 63 even if the movable portion is moved over a relatively long range of movement.

[0087] 14 and 15, the ultrasonic motor 64 is a driving source that generates a driving force for moving the frame 61, and is fixedly disposed at each arrangement portion 111A (see FIG. 3, etc.) of the first wall 111 on the positive side in the X direction. The ultrasonic motor 64 has a resonating portion 641, a piezoelectric element 642, a first electrode 643, and a second electrode 644.

[0088] The ultrasonic motor 64 on the negative side in the Y direction corresponds to the "first ultrasonic motor" of the present invention, and the ultrasonic motor 64 on the positive side in the Y direction corresponds to the "second ultrasonic motor" of the present invention.

[0089] The resonating unit 641 is formed of, for example, a conductive material, and resonates with the vibration of the piezoelectric element 642 to convert the vibrational motion into a linear motion of the frame 61. Specifically, the resonating unit 641 vibrates in an inclined direction inclined with respect to the direction of the optical axis (Y direction) based on the vibration of the piezoelectric element 642, and presses the interposed unit 63, thereby generating a thrust that moves in the direction of the optical axis in the frame 61 via the interposed unit 63. The resonating unit 641 is disposed so as to be sandwiched between two contact units 632B in the interposed unit 63. As shown in FIG. 16, the resonating unit 641 has a body unit 641A, two vibrators 641B, a protruding unit 641C, and a conductive unit 641D.

[0090] Body 641A is configured, for example, in a substantially rectangular shape, and is a portion that is sandwiched between piezoelectric elements 642. Two oscillators 641B extend in the Y direction from both ends of body 641A in the Z direction. Two oscillators 641B have symmetrical shapes, and each free end contacts contact portion 632B of interposition portion 63. Two oscillators 641B correspond to the "first oscillator" and "second oscillator" of the present invention.

[0091] Protrusion 641C extends from the center of body 641A in the Z direction to the + side in the Y direction. Current-carrying portion 641D extends from the center of body 641A in the Z direction to the opposite side to protrusion 641C (the - side in the Y direction).

[0092] The piezoelectric element 642 is a vibration element formed, for example, of a ceramic material in a plate shape, and generates vibration when a high-frequency voltage is applied to it. Two piezoelectric elements 642 are provided, and are arranged so as to sandwich the body portion 641A of the resonance unit 641 in the X direction.

[0093] The first electrode 643 has a clamping portion 643A that clamps the resonating portion 641 and the piezoelectric element 642, and an electrode portion 643B to which a voltage is applied. The first electrode 643 applies a voltage to the piezoelectric element 642 via the clamping portion 643A that clamps the piezoelectric element 642, etc. The second electrode 644 is electrically connected to the current-carrying portion 641D of the resonating portion 641. The first electrode 643 and the second electrode 644 contact the terminal of the terminal portion 111C described above inside the housing 10.

[0094] Two piezoelectric elements 642 are attached to body 641A of resonator 641 and are sandwiched between first electrodes 643, thereby being electrically connected to each other. For example, one end of a power supply path is connected to first electrode 643, and the other end is connected to second electrode 644, whereby a voltage is applied to piezoelectric element 642, causing vibration.

[0095] The resonating portion 641 has at least two resonant frequencies and deforms in a different manner for each resonant frequency. In other words, the overall shape of the resonating portion 641 is set so that the resonating portion 641 deforms in a different manner for each of the two resonant frequencies. The different behaviors are a behavior in which the frame 61 moves to the + side in the Y direction via the interposition portion 63 and a behavior in which the frame moves to the - side.

[0096] As shown in FIG. 17, the resonating portion 641 is arranged so that the vibrator 641B faces one of the pair of contact portions 632B of the interposition portion 63. Therefore, when the two vibrators 641B are deformed, the tip of the vibrator 641B presses the contact portion 632B from the opposing side of each contact portion 632B in a direction inclined with respect to the Y direction (see arrow A).

[0097] When each contact portion 632B is pressed in the direction of arrow A by the tip of vibrator 641B, a reaction force is generated in each contact portion 632B to return to the vibrator 641B side. In other words, based on the contact between each vibrator 641B and the pair of contact portions 632B, the interposition portion 63 generates a reaction force in a direction from the outside toward the inside of the pair of contact portions 632B.

[0098] A reaction force of interposed portion 63 against the pressure of vibrator 641B generates friction between vibrator 641B and contact portion 632B, generating a thrust in the Y direction in interposed portion 63. Accordingly, a thrust (see arrow B) that moves in the Y direction is applied to frame 61 that is bonded to interposed portion 63. As a result, second lens unit 32 or third lens unit 33 connected to frame 61 moves in the Y direction.

[0099] Furthermore, since the contact portion 632B is configured to extend in the Y direction, the contact portion 632B is pressed by the vibrator 641B and moves in the Y direction while in sliding contact with the vibrator 641B. Therefore, the contact portion 632B is continuously pressed by the vibrator 641B, so that the frame 61 bonded to the interposition portion 63 can be continuously moved in the Y direction. Note that, at a certain resonance frequency, the pressing direction of the vibrator 641B is the direction of the arrow A and the sliding direction of the contact portion 632B is the direction of the arrow B, whereas at another resonance frequency, the pressing direction of the vibrator 641B is the direction of the arrow C and the sliding direction of the contact portion 632B is the direction of the arrow D.

[0100] Such a driving operation is performed by each of the ultrasonic motors 64 provided on each of the first walls 111 on both sides in the X direction. That is, each ultrasonic motor 64 independently drives each of the second lens unit 32 and the third lens unit 33 in the optical axis direction.

[0101] These movements are guided by guide portion 80, as shown in Fig. 18. Guide portion 80 is disposed in an area of ​​fourth wall 114 surrounded by first wall 111, second wall 112, and third wall 113 on the positive side in the X direction. In other words, guide portion 80 is disposed on one end side of both ends of second lens unit 32 and third lens unit 33 of housing 10 that sandwich optical axis O therebetween (see also Fig. 7).

[0102] The guide section 80 has a first guide shaft 81 and a second guide shaft 82, both of which extend in the direction of the optical axis (Y direction), are arranged apart from each other, and cooperate to support both of the two frames 61 movably in the direction of the optical axis. The first guide shaft 81 and the second guide shaft 82 are made of, for example, stainless steel, and are supported by guide support sections (not shown) of the second wall 112 and the third wall 113 on both ends of the optical axis of the housing 10 (both ends in the X direction). The second wall 112 and the third wall 113 correspond to the "pair of walls" extending from the bottom wall (fourth wall 114) of the present invention.

[0103] The first guide shaft 81 is a guide shaft that supports the second portion 611B and the third portion 611C of the guided portion 611 of the frame 61 to guide the movement of the frame 61.

[0104] The second guide shaft 82 is disposed parallel to the first guide shaft 81 on the negative side (fourth wall 114 side) in the Z direction from the first guide shaft 81, and is a guide shaft that supports (engages) the second portion 611B of the guided portion 611 of the frame 61 to guide the movement of the frame 61. The first guide shaft 81 and the second guide shaft 82 are disposed at approximately the same position in the X direction as the above-mentioned support shaft 50 (see FIG. 10). In this way, by providing two guide shafts, the first guide shaft 81 and the second guide shaft 82, that guide the movement of the lens driving unit 60, the strength of the housing 10 can be improved.

[0105] The second guide shaft 82 is supported by a bearing portion 114A provided on the fourth wall 114. The bearing portion 114A is provided between the two frames 61, protruding from the fourth wall 114 to the positive side in the Z direction, and is disposed in a range near the center of the second guide shaft 82 in the Y direction. The second guide shaft 82 is adhesively fixed to the bearing portion 114A. The bearing portion 114A is also disposed in a range including the center 82A of the second guide shaft 82 in the X direction (between both ends sandwiching the optical axis) (see FIG. 10).

[0106] Furthermore, the bearing portion 114A is provided at a position where it can come into contact with the second portion 611B of the frame 61. Therefore, when the frame 61 moves toward the + side in the Y direction, the second portion 611B of the frame 61 comes into contact with the bearing portion 114A (see FIG. 19). As a result, the bearing portion 114A restricts the movement of the frame 61.

[0107] Next, the magnet section 614 will be described in detail.

[0108] 20, the magnet section 614 has a first pole 614A and a second pole 614B that are adjacently arranged via a boundary 614D in the X direction (the width direction perpendicular to the Y direction). The first pole 614A is a magnet with an N pole, and the second pole 614B is a magnet with an S pole. In other words, the first pole 614A and the second pole 614B are magnetized in a direction along the direction in which the magnet section 614 and the position detection section 70 face each other (the Z direction in this embodiment), and so as to face the position detection section 70.

[0109] The first pole 614A and the second pole 614B are arranged in contact with each other. Therefore, the N pole and the S pole are arranged adjacent to each other on the surface 614C of the magnet section 614 facing the position detection section 70.

[0110] The magnet section 614 is configured such that, with the first pole 614A and the second pole 614B in contact with each other, the surface 614C facing the position detection section 70 is rectangular and extends in the Y direction. In other words, the magnet section 614 extends linearly along the Y direction with a constant width.

[0111] The surface of the first pole 614A adjacent to the second pole 614B is configured in an arc shape such that the center in the Y direction protrudes more toward the second pole 614B side than both ends in the Y direction.

[0112] The surface of the second pole 614B adjacent to the first pole 614A is configured so that the center in the Y direction is recessed more than both ends in the Y direction so as to follow the shape of the adjacent surface of the first pole 614A.

[0113] That is, the boundary 614D between the first pole 614A and the second pole 614B extends in a curved manner (curved in an arc) such that the angle it forms with the Y direction changes continuously. Specifically, the boundary 614D extends in a curved manner so that it displaces in the X direction from the first pole 614A side toward the second pole 614B side as it moves from the negative end of the magnet section 614 in the Y direction to a predetermined position, and displaces in the X direction from the second pole 614B side toward the first pole 614A side as it moves from the predetermined position to the positive end of the magnet section 614 in the Y direction. As a result, the ratio between the width of the first pole 614A and the width of the second pole 614B changes due to the curved boundary 614D. More specifically, the ratio of the first pole 614A to the second pole 614B increases in the Y direction from the negative end of the magnet section 614 in the Y direction to a predetermined position. The ratio of the first pole 614A decreases from the predetermined position to the positive end of the magnet section 614 in the Y direction.

[0114] The predetermined position is, for example, the center position in the Y direction of the magnet part 614. Furthermore, the positions in the X direction of both ends in the Y direction of the first pole 614A and the second pole 614B are the same.

[0115] In other words, the first pole 614A and the second pole 614B are configured symmetrically on the + side and the - side in the Y direction.

[0116] With this configuration, the distribution of magnetic force in the magnet section 614 can be made symmetrical between the + side and the - side with respect to the center in the Y direction. This allows the magnetic flux density of the magnet section 614 detected by the position detection section 70 to differ depending on the position of the frame 61 (see, for example, FIG. 22). In other words, the boundary 614D between the first pole 614A and the second pole 614B extends in a curved manner so that the direction of the magnetic flux in the portion of the magnet section 614 facing the position detection section 70 forms a magnetic field that changes with the movement of the magnet section 614.

[0117] Next, the position detection by the position detection unit 70 will be described.

[0118] As shown in Figures 21A, 21B, and 21C, the position detection unit 70 can detect fluctuations in the magnetic field (magnetic flux density) due to the ratio of north poles and the ratio of south poles in the opposing portions of the magnet unit 614 in response to movement of the frame 61 in the Y direction.

[0119] 21A, when the position of the frame 61 is the negativemost position in the Y direction, the position detection unit 70 faces the positive end of the magnet unit 614 in the Y direction. The position detection unit 70 faces a portion of the end where the proportion of the first pole 614A, which is the N pole, is large.

[0120] 21B, when frame 61 moves toward the positive side in the Y direction, magnet section 614 also moves together with frame 61, and therefore the opposing portion of magnet section 614 to position detection section 70 changes. As magnet section 614 moves toward the center position in the Y direction, the proportion of first pole 614A increases, and therefore the proportion of first pole 614A in the opposing portion to position detection section 70 gradually increases.

[0121] When the frame 61 moves to a position where the position detection unit 70 faces the center of the frame 61, the portion where the proportion of the first pole 614A (north pole) is maximum becomes the portion facing the position detection unit 70.

[0122] Then, as shown in FIG. 21C, when frame 61 moves from a position where position detection unit 70 faces the central portion of frame 61 to a position where it faces the negative end of magnet unit 614 in the Y direction, the proportion of first pole 614A in the portion facing position detection unit 70 decreases, and the proportion of second pole 614B increases.

[0123] The position detection unit 70 detects the magnetic flux density at each position in the Y direction in the magnet unit 614. The change in the magnetic flux density detected by the position detection unit 70 at this time is, for example, as shown in FIG.

[0124] Specifically, as the frame 61 moves to the + side in the Y direction, the magnetic flux density suddenly increases from B1 on the - side of 0 to B2 on the + side of 0, and then gradually decreases to B3 on the - side of 0. Then, the magnetic flux density suddenly increases from B3 to B4 on the + side of 0.

[0125] For example, by setting the magnetic flux density value in a range with a substantially constant gradient, such as the range from B2 to B3, for each position in the Y direction, it is possible to allocate the magnetic flux density corresponding to each position in the Y direction of the frame 61 at substantially equal intervals. As a result, it is possible to accurately detect the change in the Y direction position of the frame 61 (magnet section 614) in the Y direction.

[0126] That is, in this embodiment, the magnetic flux density detected by the position detection unit 70 can be made to differ for each position on the frame 61, so that the position detection unit 70 can detect the position of the frame 61 in the Y direction with high accuracy.

[0127] Furthermore, because the position detection unit 70 is a magnetoresistance effect element, it can detect the magnetic force in the horizontal direction (X direction and Y direction) of the magnet unit 614. For example, if the position detection unit is a Hall element, it detects the magnetic force in the vertical direction (Z direction) of the magnet unit. Therefore, for example, if the position of the magnet unit is shifted in the X direction due to an assembly error, the magnet unit may fall out of the detection range of the position detection unit, making it impossible to detect the magnetic force, and ultimately making it impossible to accurately detect the position of the frame (movable lens).

[0128] In contrast, in this embodiment, since the position detector 70 is a magnetoresistance effect element, the detection range of the magnetic force in the horizontal direction can be expanded compared to a position detector using a Hall element. As a result, even if the position of the magnet part 614 is shifted in the X direction due to an assembly error, the magnetic force of the magnet part 614 can be detected, and the position of the frame 61 (movable lens) can be accurately detected.

[0129] In addition, since the first pole 614A and the second pole 614B of the magnet section 614 are symmetrical on the + side and - side in the Y direction, the distribution of the magnetic force can be made symmetrical accordingly. This allows the gradient of the change in the magnetic flux density in the position detection section 70 to be substantially constant (for example, between B2 and B3 in FIG. 22), so that the change in the magnetic flux density at each position in the Y direction can be made substantially constant. As a result, the magnetic flux density can be allocated to each position in the Y direction at equal intervals, so that the position detection section 70 can accurately detect the position of the frame 61 (movable lens) in the Y direction.

[0130] In the above embodiment, the adjacent surface between the first pole 614A and the second pole 614B is configured in an arc shape, but the present invention is not limited to this. For example, as shown in FIG. 23, the adjacent surface between the first pole 614A and the second pole 614B may be configured in a triangular shape.

[0131] As shown in FIG. 24, the adjacent surfaces of the first pole 614A and the second pole 614B may be configured in a stepped shape.

[0132] In addition, in the above embodiment, the first pole 614A and the second pole 614B are symmetrical on both sides in the Y direction, but the present invention is not limited to this. For example, as shown in FIG. 25, the first pole 614A and the second pole 614B do not have to be symmetrical on both sides in the Y direction.

[0133] Fig. 25 shows that the adjacent surfaces of the first pole 614A and the second pole 614B are triangular. The apex position (predetermined position) of the adjacent surfaces of the first pole 614A is shifted toward the + side in the Y direction from the center in the Y direction of the magnet part 614. Also, as shown in Fig. 26, the apex position (predetermined position) of the adjacent surfaces of the first pole 614A may be the center in the Y direction, and the positions in the X direction of both ends in the Y direction of the adjacent surfaces of the first pole 614A may be different from each other.

[0134] In addition, in the above embodiment, the position detection unit 70 detects the magnetic flux density of the magnet unit 614, but the present invention is not limited to this. For example, the position detection unit 70 may detect the rotation angle of the magnet unit 614 around the Z direction.

[0135] In the above embodiment, one position detection unit 70 is provided for each frame 61, but the present invention is not limited to this. For example, as shown in Fig. 27, a configuration may be adopted in which a plurality of position detection units 70 are arranged side by side in the direction of the optical axis (Y direction). In this way, the accuracy of position detection of the frame 61 can be further improved.

[0136] In addition, in the above embodiment, the position detection unit 70 is a magnetoresistance effect element, but the present invention is not limited to this, and any element may be used as long as it is capable of detecting a magnetic field in a plane including the X direction and the Y direction.

[0137] Further, while the above embodiment has a configuration having two guide shafts, the present invention is not limited to this, and may have, for example, a configuration having three or more guide shafts, or a configuration having one guide shaft.

[0138] Furthermore, in the above embodiment, the support shafts 50 are provided on both sides in the X direction, but the present invention is not limited to this, and the support shafts 50 may be provided on only one side in the X direction.

[0139] In addition, in the above embodiment, the side wall portion 11 and the bottom wall portion 12 of the housing 10 are insert molded, but the present invention is not limited to this, and the bottom wall portion may be adhesively fixed to the side wall portion 11.

[0140] In addition, while the above embodiment has a configuration having two movable lenses consisting of second lens unit 32 and third lens unit 33, the present invention is not limited to this and may have a configuration having three or more movable lenses, or a configuration having one movable lens.

[0141] In addition, in the above embodiment, the configuration has four lens units, but the present invention is not limited to this, and any number of lens units may be provided as long as the configuration has at least one movable lens. In addition, in the case of a configuration having one movable lens, there will also be one lens driving unit.

[0142] Further, in the above embodiment, the interposition portion 63 is formed by bending a plate-shaped metal member, but the present invention is not limited to this, and the main body portion and the contact portion constituting the interposition portion may be formed of separate members.

[0143] In the above embodiment, the frame 61 and the interposition portion 63 are configured as separate members, but the present invention is not limited to this. For example, the frame 61 and the interposition portion 63 may be configured as one piece. That is, the lens driving portion may have a moving portion that moves in the optical axis direction according to the resonance of the resonating portion and is connected to each of the lens units so as to transmit the movement in the optical axis direction.

[0144] Further, in the above embodiment, the connection portion 62 connecting the frame 61 and the lens unit is made of a spring material, but the present invention is not limited to this and may be made of any material as long as it is an elastic material.

[0145] Further, in the above embodiment, the third portion 611C of the frame 61 is disposed at a distance from the second guide shaft 82, but the present invention is not limited to this, and the third portion may also support the second guide shaft.

[0146] In addition, in the above embodiment, the bottom wall portion has a bent portion and a half punch, but the present invention is not limited to this, and the bottom wall portion may have a structure that does not have a bent portion or a half punch.

[0147] Furthermore, in the above embodiment, resonating portion 641 has two oscillators 641B, but the present invention is not limited to this, and may have, for example, one oscillator.

[0148] In addition, in the above embodiment, the drive control unit, the reflection drive control unit, and the imaging control unit are provided separately, but the present invention is not limited to this, and at least two of the drive control unit, the reflection drive control unit, and the imaging control unit may be configured as a single control unit.

[0149] Furthermore, in the above embodiment, the bearing portion 114A is provided, but the present invention is not limited to this, and it is not necessary to provide a bearing portion.

[0150] Furthermore, in the above embodiment, the absorbing portion 613 is provided, but the present invention is not limited to this, and it is not necessary to provide an absorbing portion.

[0151] Also, for example, in the above embodiment, a smartphone, which is a mobile terminal with a camera, has been described as an example of a camera-mounted device having the camera module 1, but the present invention can be applied to a camera-mounted device having a camera module and an image processing unit that processes image information obtained by the camera module. Camera-mounted devices include information devices and transport equipment. Information devices include, for example, mobile phones with cameras, notebook computers, tablet terminals, portable game consoles, web cameras, drones, and in-vehicle devices with cameras (for example, rear monitor devices and drive recorder devices). Transport equipment includes, for example, automobiles and drones.

[0152] 29A and 29B are diagrams showing an automobile V as a camera-mounted device equipped with an in-vehicle camera module VC (Vehicle Camera). FIG. 29A is a front view of the automobile V, and FIG. 29B is a rear perspective view of the automobile V. The automobile V is equipped with the camera module 1 described in the embodiment as the in-vehicle camera module VC. As shown in FIG. 29A and FIG. 29B, the in-vehicle camera module VC is attached to the windshield facing forward, or to the rear gate facing backward, for example. This in-vehicle camera module VC is used for a backup monitor, a drive recorder, a collision avoidance control, an automatic driving control, etc.

[0153] In addition, the above-mentioned embodiments are merely examples of the embodiment of the present invention, and the technical scope of the present invention should not be interpreted as being limited by them. In other words, the present invention can be embodied in various forms without departing from the gist or main features of the present invention. For example, the shapes, sizes, numbers and materials of each part described in the above-mentioned embodiments are merely examples, and can be modified as appropriate.

[0154] The disclosures of the specification, drawings and abstract contained in U.S. Provisional Application No. 63 / 002,300, filed March 30, 2020, are incorporated herein by reference in their entirety. [Industrial Applicability]

[0155] INDUSTRIAL APPLICABILITY The lens driving device according to the present invention is useful as a lens driving device, a camera module, and a camera-mounted device that can accurately detect the position of a movable lens. [Explanation of symbols]

[0156] 1 Camera module 10. Chassis 11 Side wall 12 Bottom wall 20 Reflection drive unit 21 Reflective housing 22. Mirror 23 Reflex drive control section 30 Lens section 31 First lens unit 32 Second lens unit 32A Main unit 32B Supported part 33 Third lens unit 33A Main body 33B Supported part 34 Fourth lens unit 34A Convex 40 Imaging unit 50 Support shaft 60 Lens drive unit 61 Frames 62 Connection 63 Interposition part 64 Ultrasonic Motor 70 Position detection unit 80 Guide part 81 First guide shaft 82 Second guide shaft 100 Drive control unit 111 1st wall 111A Placement section 111B Engaged part 111C Terminal section 112 Second wall 112A Support part 112B Placement section 112C Guide support part 112D opening 113 Third wall 113A Bridge part 113B Support part 113C Guide support part 114 4th wall 114A Bearing part 121 Positioning part 122 Bending part 123 Half Punch 200 Imaging control unit 611 Guided part 611A Part 1 611B 2nd part 611C 3rd part 611D Part 4 612 Magnet holder 613 Absorption section 614 Magnet section 614A 1st pole 614B 2nd pole 614C Opposite side 614D Boundary 631 First intervening member 631A Engagement hole 631B Engagement hole 632 Second intervening member 632A Main Unit 632B Contact part 632C Connection part 632D Connection 641 Resonance section 641A Torso 641B Oscillator 641C Protrusion 641D Current carrying part 642 Piezoelectric element 643 1st electrode 643A Clamping part 643B Electrode section 644 2nd electrode

Claims

1. A movable part capable of holding a movable lens; a drive unit that drives the movable unit in a direction of the optical axis; a magnet portion provided on the movable portion, extending in the direction of the optical axis, and having a first pole and a second pole arranged adjacent to each other with a boundary therebetween in a width direction perpendicular to the direction of the optical axis; a position detection unit that is disposed opposite the magnet unit and detects a position of the magnet unit by detecting a magnetic field in a plane that includes the direction of the optical axis and the width direction; Equipped with The boundary extends in a curved manner such that an angle formed with the direction of the optical axis changes depending on a position in the width direction. Lens drive unit.

2. the boundary extends in a curved manner so as to be displaced in the width direction from the first pole side toward the second pole side as the boundary moves from one end of the magnet section in the direction of the optical axis to a predetermined position in the direction of the optical axis, and to be displaced in the width direction from the second pole side toward the first pole side as the boundary moves from the predetermined position to the other end of the magnet section in the direction of the optical axis. The lens driving device according to claim 1 .

3. The boundary extends in a curved manner such that the angle with respect to the direction of the optical axis changes continuously. The lens driving device according to claim 1 .

4. the boundary extends in a curved manner so as to form a magnetic field in which the direction of magnetic flux in a portion of the magnet section facing the position detection section changes with the movement of the magnet section; The lens driving device according to claim 1 .

5. The boundary extends in an arc-like curve. The lens driving device according to claim 1 .

6. The magnet portion extends linearly along the optical axis with a constant width, the ratio of the width of the first pole to the width of the second pole varies with the boundary extending in a curved manner; The lens driving device according to claim 1 .

7. The position detection unit includes a magnetoresistive element. The lens driving device according to claim 1 .

8. the position detection unit includes a plurality of magnetoresistance effect elements arranged side by side in the direction of the optical axis, The lens driving device according to claim 1 .

9. the movable portion includes a first movable portion and a second movable portion capable of holding a first movable lens and a second movable lens, respectively; the driving unit includes a first driving unit and a second driving unit, each of which is disposed at one end of both ends of the first movable unit and the second movable unit that sandwich the optical axis, and which drive the first movable unit and the second movable unit, respectively, in a direction of the optical axis; The magnet portion is provided in each of the first movable portion and the second movable portion. The lens driving device according to claim 1 .

10. the first driving unit has a first ultrasonic motor and a first frame connected to the first movable unit, the second driving unit has a second ultrasonic motor and a second frame connected to the second movable unit, the first ultrasonic motor and the second ultrasonic motor are arranged side by side in the direction of the optical axis at the one end side, and drive the first movable part and the second movable part independently in the direction of the optical axis; The lens driving device according to claim 9.

11. The lens driving device according to claim 1 , a lens unit including the movable lens held by the movable portion; an imaging unit that captures a subject image formed by the lens unit; Equipped with Driving the movable lens in the direction of the optical axis; Camera module.

12. A camera-equipped device that is an information device or a transport device, A camera module according to claim 11; an imaging control unit that processes image information obtained by the camera module; A camera-equipped device comprising:

Images