Lens driving device, camera module, and camera mounting device

Abstract

The lens driving device includes: a first movable part, a second movable part, a first driving part, and a second driving part. The first driving part and the second driving part respectively have a first ultrasonic motor and a second ultrasonic motor. The first ultrasonic motor and the second ultrasonic motor are arranged on opposite sides of each other with respect to the optical axis, and independently drive the first movable part and the second movable part along the direction of the optical axis.

Description

Technical Field

[0001] The present invention relates to a lens driving device, a camera module and a camera mounting device. Background Art

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

[0003] For example, Patent Document 1 discloses a structure including: a fixed lens on which light from an object is incident; two movable lenses on which light refracted by the fixed lens is incident; and a lens driving unit for moving the two movable lenses along the optical axis.

[0004] The lens drive unit includes a feed screw mechanism based on motors corresponding to the two movable lenses. Within the camera module housing, in areas adjacent to the fixed lens and the movable lens, the motors are positioned at both ends of the optical axis. A locking nut is provided on the drive shaft of each motor. This locking nut engages with the frame of the movable lens and is movable on the drive shaft by rotation of the drive shaft. The locking nut moves on the drive shaft as the motor rotates, thereby moving the movable lens.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Laid-Open No. 2018-36416 Summary of the Invention

[0008] Problems to be solved by the invention

[0009] However, from the perspective of enhancing the zoom function of the lens drive device, it is preferable to expand the range of movement of each movable lens. However, motors such as stepping motors have a certain size. Therefore, if two motors are provided as described in Patent Document 1, the lens drive device may become too large considering the range of movement of the movable lens.

[0010] An object of the present invention is to provide a lens driving device, a camera module, and a camera mounting device that can achieve miniaturization while ensuring the movable range of a movable lens.

[0011] Solutions to the Problem

[0012] The lens driving device of the present invention comprises:

[0013] a first movable portion and a second movable portion arranged along the direction of the optical axis and capable of holding the first movable lens and the second movable lens, respectively; and

[0014] a first driving portion and a second driving portion for driving the first movable portion and the second movable portion along the direction of the optical axis,

[0015] The first driving unit and the second driving unit respectively include a first ultrasonic motor and a second ultrasonic motor. The first ultrasonic motor and the second ultrasonic motor are arranged on opposite sides of each other with respect to the optical axis, and independently drive the first movable unit and the second movable unit along the direction of the optical axis.

[0016] The camera module of the present invention comprises:

[0017] The lens driving device mentioned above;

[0018] a lens section including the first movable lens and the second movable lens held by the first movable section and the second movable section; and

[0019] an imaging unit for capturing an image of an object formed by the lens unit;

[0020] The camera module drives the first movable lens and the second movable lens along the direction of the optical axis.

[0021] The camera-mounted device of the present invention is an information device or a transportation device, and comprises:

[0022] The camera module described above; and

[0023] The imaging control unit processes the image information obtained by the camera module.

[0024] Effects of the Invention

[0025] According to the present invention, it is possible to achieve miniaturization while ensuring the movable range of the movable lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a diagram simply showing a camera module according to an embodiment of the present invention.

[0027] Figure 2 This is a diagram simply showing the structure of the camera module according to this embodiment as viewed from the side.

[0028] Figure 3 It is a perspective view showing the casing portion of the camera module.

[0029] Figure 4 This is a perspective view of the bottom wall portion of the camera module housing.

[0030] Figure 5 This is an exploded perspective view of the housing and lens unit.

[0031] Figure 6 It is an exploded perspective view of the side wall and bottom wall of the housing.

[0032] Figure 7 It is a partial cross-sectional view of the bottom wall.

[0033] Figure 8 This is a diagram of the housing viewed from the + side in the Z direction.

[0034] Figure 9 It is a diagram showing the opposing portion of the magnet and the position detection unit.

[0035] Figure 10A It is a diagram for explaining the positional relationship between the magnet and the position detection unit.

[0036] Figure 10B It is a diagram for explaining the positional relationship between the magnet and the position detection unit.

[0037] Figure 10C It is a diagram for explaining the positional relationship between the magnet and the position detection unit.

[0038] Figure 11 It is a diagram showing the connection portion between the lens unit and the frame.

[0039] Figure 12 It is a figure which shows the structure of an interposition part.

[0040] Figure 13 3 is a diagram showing the arrangement relationship between the intervening portion and the ultrasonic motor.

[0041] Figure 14 It is a three-dimensional diagram of an ultrasonic motor.

[0042] Figure 15 This is an exploded perspective view of an ultrasonic motor.

[0043] Figure 16 This is an enlarged view of the contact portion between the resonating portion and the intervening portion.

[0044] Figure 17 It is a diagram showing a configuration including a plurality of position detection units.

[0045] Figure 18A A diagram showing a smartphone equipped with a camera module.

[0046] Figure 18B A diagram showing a smartphone equipped with a camera module.

[0047] Figure 19AThis figure shows a car equipped with a camera module.

[0048] Figure 19B This figure shows a car equipped with a camera module. DETAILED DESCRIPTION

[0049] Hereinafter, embodiments of the present invention will be described in detail based on the accompanying drawings. Figure 1 This is a diagram that simply shows a camera module 1 according to an embodiment of the present invention. Figure 2 This is a diagram simply showing the configuration of the camera module 1 according to the present embodiment as viewed from the side.

[0050] The camera module 1 is mounted on, for example, a smartphone M (see Figure 18A 、 Figure 18B ), thin camera-mounted devices such as mobile phones, digital cameras, laptop computers, tablet terminals, portable game consoles, and car cameras.

[0051] When describing the structure of the camera module 1 of this embodiment, an orthogonal coordinate system (X, Y, Z) is used. The same orthogonal coordinate system (X, Y, Z) is also used in the following figures. For example, the camera module 1 is mounted as follows: when the camera-mounted device is actually shooting, 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. Light from the subject is incident from the Z-side (negative side), refracted, and guided toward the Y-side (positive side). By reducing the thickness of the camera module 1 in the Z direction, the camera-mounted device can be made thinner.

[0052] like Figure 1 As shown, the camera module 1 includes a housing 10, a reflection drive unit 20, a lens unit 30, an imaging unit 40, and a guide shaft 50 (see FIG. Figure 3 )、the lens driving unit 60 (refer to Figure 5 )、position detection unit 70 (refer to Figure 9 ), and a drive control unit 100.

[0053] 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 a program corresponding to the processing content from the ROM and expands it in the RAM, and cooperates with the expanded program to centrally control the lens drive unit 60. Thus, the drive control unit 100 drives the second lens unit 32 and the third lens unit 33, which will be described later, of the lens section 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 guide 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.

[0054] In addition, if Figure 2 As shown in FIG. 1 , in the camera module 1 , the incident light L1 enters the housing 10 via the reflection drive unit 20 . The reflection drive unit 20 includes a reflection housing 21 , a reflection mirror 22 , and a reflection drive control unit 23 . Figure 1 and Figure 2 In the illustrated example, the reflective housing 21 is disposed adjacent to the Y-side end of the housing 10. The reflective mirror 22 is disposed within the reflective housing 21 and reflects the incident light L1 as reflected light L2 toward the housing 10. The reflective drive control unit 23 includes a CPU, ROM, RAM, and the like, and controls the direction of the reflective mirror 22.

[0055] Furthermore, the reflector 22 of this embodiment has two rotation axes (not shown) extending in the X and Z directions. In the reflector drive unit 20, under the control of the reflector drive control unit 23, the reflector 22 rotates about these rotation axes. This enables the camera module 1 to have an optical image stabilization (OIS) function that optically corrects for shake (vibration) generated during shooting to reduce image blur.

[0056] The reflected light L2 that has entered the housing 10 is output to the imaging unit 40 via the lens unit 30 housed in the housing 10 .

[0057] The imaging unit 40 is disposed on the outer side surface of the housing 10 on the positive side in the Y direction (disposition portion 112B of the second wall 112 described later) and is configured to allow the reflected light L2 to enter through the lens unit 30. The imaging unit 40 includes an imaging element and a substrate (not shown).

[0058] The imaging element is comprised of, for example, a CCD (Charge Coupled Device) image sensor or a CMOS (Complementary Metal Oxide Semiconductor) image sensor. The imaging element is mounted on a substrate and electrically connected to wiring on the substrate via bonding wires. The imaging element captures the image of the subject formed by the lens unit 30 and outputs an electrical signal corresponding to the image.

[0059] Furthermore, a printed wiring board (not shown) is electrically connected to the substrate of the imaging unit 40. This printed wiring board supplies power to the imaging element and outputs an electrical signal representing the image of the subject captured by the imaging element. This electrical signal is then output to the imaging control unit 200, which is mounted on the camera-mounted device. The imaging control unit 200 includes a CPU, ROM, RAM, and other components, and processes image information obtained by the camera module 1. The imaging control unit 200 can be mounted on the camera-mounted device, but can also be built into the camera module 1.

[0060] like Figure 3 As shown, the housing 10 accommodates the lens unit 30, the guide shaft 50 and the lens driving unit 60 (see also Figure 5 The housing 10 has a side wall portion 11 and a bottom wall portion 12.

[0061] The side wall portion 11 is made of resin, for example, and is formed into a U-shaped wall portion that opens toward the Y direction - side, and includes a first wall 111, a second wall 112, a third wall 113, and a fourth wall 114 (see also FIG. Figure 8 wait).

[0062] A pair of first walls 111 are provided on both sides in the X direction. The first walls 111 are formed to extend in the Y direction. A placement portion 111A is provided on the inner side surface of the housing 10 in the first wall 111. The piezoelectric element described later is placed in the placement portion 111A. Figure 4 As shown, an engaged portion 111B is formed on the bottom surface (the surface on the - side in the Z direction) of the first wall 111. The engaged portion 111B is engaged with the positioning portion 121 of the bottom wall 12. The pair of first walls 111 corresponds to the "pair of walls" of the present invention.

[0063] like Figure 3 and Figure 4As shown, the second wall 112 extends in the X direction and is provided to connect the positive-side ends of the pair of first walls 111 in the Y direction. Furthermore, guide support portions 112A are provided on both sides of the top surface (the positive-side surface in the Z direction) of the second wall 112 in the X direction to support the guide shaft 50. A placement portion 112B is provided on the outer side surface of the second wall 112, and the imaging unit 40 is disposed in this placement portion 112B.

[0064] Furthermore, a drive support portion 112C and an opening 112D are provided within the arrangement portion 112B of the second wall 112. In this embodiment, the drive support portion 112C is a hole that supports the drive shaft 61, described later, and is provided on both sides of the arrangement portion 112B in the X direction. The opening 112D is an opening into which the fourth lens unit 34 of the lens unit 30 is fitted and is provided in the center of the arrangement portion 112B in the X direction.

[0065] like Figure 3 As shown, the third wall 113 is provided at the Y-side end portion of each of the pair of first walls 111. The pair of third walls 113 are provided so as to surround the space defined by the first wall 111 and the second wall 112. A gap large enough to allow the first lens unit 31 of the lens section 30 to enter is provided between the pair of third walls 113.

[0066] Furthermore, guide support portions 113A are provided on the top surfaces (positive side surfaces in the Z direction) of the pair of third walls 113 to support the guide shaft 50. Drive support portions 113B are provided near the center of the pair of third walls 113 in the Z direction to support the drive shaft 61 described later.

[0067] In this embodiment, the height of the driving support portion 113B is the same as the height of the driving support portion 112C of the second wall 112 described above.

[0068] like Figure 5 As shown, the fourth wall 114 constitutes the bottom wall of the space formed by each first wall 111, the third wall 113 corresponding to the first wall 111, and the second wall 112. The fourth wall 114 is provided in the region corresponding to the third wall 113 in the X direction (see also FIG. Figure 8 ) Therefore, a gap is provided between the fourth walls 114 on both sides in the X direction.

[0069] The fourth wall 114 region on the + side in the X direction and the fourth wall 114 region on the - side in the X direction of the side wall 11 correspond to the “walls on both end sides in the direction of the optical axis” of the present invention.

[0070] like Figures 4 to 6As shown, bottom wall portion 12 is a generally rectangular metal plate, for example, forming the bottom wall of housing 10. It is provided to bridge fourth wall 114 and the pair of first walls 111 on either side in the X direction. Bottom wall portion 12 is integrally formed with the bottom surface portion of side wall portion 11, including the bottom portion of the pair of first walls 111, by insert molding.

[0071] Positioning portions 121 are provided on both ends of the bottom wall 12 in the X direction. These protruding portions 121 engage with the engaged portions 111B of the first wall 111. This allows positioning of the bottom wall 12 in the Y direction.

[0072] In addition, if Figure 6 and Figure 7 As shown, 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 these side ends toward the positive side in the Z direction. The bent portions 122 at the two side ends in the Y direction are shorter than the bent portions 122 at the two side ends in the X direction.

[0073] Furthermore, a groove (not shown) into which the bent portion 122 enters is formed in a portion of the housing 10 corresponding to the bent portion 122. The bent portion 122 enters the groove, thereby fixing the bottom wall 12 to the housing 10.

[0074] Furthermore, since the side wall portion 11 is configured in a generally U-shape, for example, the bent portion 122A at the end of the bottom wall portion 12 on the - side in the Y direction (the direction of the optical axis) is located in a portion where no wall exists. In other words, the end of the bottom wall portion 12 on the light incident side in the Y direction is bent toward the side wall portion 11. The provision of this bent portion 122 enhances the strength of the bottom wall portion of the housing 10.

[0075] Furthermore, a plurality of half punched holes 123 arranged in the Y direction are formed on the surface of the bottom wall portion 12. The half punched holes 123 are provided over the X direction of the bottom wall portion 12. In this embodiment, a total of five half punched holes 123 are provided.

[0076] By providing the half punched hole 123 in this manner, the strength of the bottom wall portion of the housing 10 can be improved.

[0077] like Figure 3 and Figure 5 As shown, the lens unit 30 is provided to include the reflected light L2 (refer to Figure 2 ) passes through, and is sandwiched by a pair of first walls 111. The lens portion 30 includes a first lens unit 31, a second lens unit 32, a third lens unit 33, and a fourth lens unit 34 arranged in the Y direction.

[0078] The first lens unit 31 is arranged on the most upstream side in the incident direction of the reflected light L2 (direction toward the positive side of the Y direction), and is fixed between the pair of third walls 113 in the housing 10 .

[0079] The side surface of the first lens unit 31 is, for example, curved so that its central portion in the Z direction is convex. The side surface of the third wall 113 on the first lens unit 31 side is, for example, shaped to conform to the side surface of the first lens unit 31 and configured so that the curved portion of the first lens unit 31 fits within. Thus, the first lens unit 31 is fixed between the pair of third walls 113.

[0080] The second lens unit 32 is positioned downstream of the first lens unit 31 in the direction of incidence and includes a main body 32A and a supported portion 32B. The third lens unit 33 is positioned downstream of the second lens unit 32 in the direction of incidence and includes a main body 33A and a supported portion 33B. The second lens unit 32 corresponds to the "first movable portion" of the present invention, and the third lens unit 33 corresponds to the "second movable portion" of the present invention.

[0081] Each main body 32A, 33A holds a lens through which light passing through the first lens unit 31 passes. The supported portions 32B, 33B are supported by the guide shaft 50 so as to be movable along the guide shaft 50 and are provided on both sides of each main body 32A, 33A in the X direction.

[0082] The lens included in the main body 32A of the second lens unit 32 corresponds to the “first movable lens” of the present invention. The lens included in the main body 33A of the third lens unit 33 corresponds to the “second movable lens” of the present invention.

[0083] The fourth lens unit 34 is arranged on the most downstream side in the incident direction and is constituted by including a lens. The fourth lens unit 34 is supported by the guide shaft 50 at a position adjacent to the second wall 112 of the housing 10. Figure 4 As shown, in this embodiment, a convex portion 34A is provided on the surface on the positive side in the Y direction of the fourth lens unit 34 .

[0084] The lenses in the first to fourth lens units 31 to 34 may be incorporated into the housing 10 when the lens driving device is manufactured, or may be incorporated into the housing 10 when the camera module 1 is manufactured from the lens driving device.

[0085] The convex portion 34A has a size capable of being fitted into the opening 112D of the second wall 112. The fourth lens unit 34 is fixed to the housing 10 by fitting the convex portion 34A into the opening 112D.

[0086] like Figure 3 and Figure 5 As shown, the guide shaft 50 is made of, for example, stainless steel. The guide shaft 50 extends in the Y direction and is provided in a region of each of the pair of third walls 113. In this embodiment, the guide shafts 50 are of equal length and are supported by the guide support portion 113A of the third wall 113 and the guide support portion 112A of the second wall 112.

[0087] In addition, if Figure 8 As shown, each pair of the first wall 111, the third wall 113, and the fourth wall 114 has, for example, substantially the same shape and is symmetrically arranged on both sides of the X-direction with respect to the optical axis O in the lens portion 30. Specifically, each pair of the first wall 111, the third wall 113, and the fourth wall 114 is symmetrically arranged with respect to the optical axis O, such that each of the first walls 111 is located at a predetermined distance from the optical axis O.

[0088] By arranging the pair of first walls 111, the third wall 113, and the fourth wall 114 as described above, the pair of guide shafts 50, which are respectively supported by the pair of third walls 113, are arranged symmetrically with respect to the optical axis O. More specifically, the pair of guide shafts 50 are arranged so as to extend on both sides of the optical axis O and to be equidistant from each other.

[0089] The pair of guide shafts 50 corresponds to the "guide portion" of the present invention. The guide shaft 50 on the + side in the X direction corresponds to the "first guide shaft" of the present invention, and the guide shaft 50 on the - side in the X direction corresponds to the "second guide shaft" of the present invention.

[0090] A lens driver 60 is provided corresponding to each of the second lens unit 32 and the third lens unit 33. Under the control of the aforementioned drive control unit 100, the lens driver 60 independently moves the second lens unit 32 or the third lens unit 33 to which it corresponds. The lens driver 60 is disposed on either side of the fourth wall 114 in the X-direction, surrounded by the first wall 111, the second wall 112, and the third wall 113. In other words, one lens driver 60 is provided on each side of the optical axis in the housing 10.

[0091] In this embodiment, the lens driving unit 60 on the positive side in the X direction drives the second lens unit 32 in the Y direction, and the lens driving unit 60 on the negative side in the X direction drives the third lens unit 33 in the Y direction. In other words, the lens driving unit 60 on the positive side in the X direction corresponds to the "first driving unit" of the present invention, and the lens driving unit 60 on the negative side in the X direction corresponds to the "second driving unit" of the present invention.

[0092] In this embodiment, the lens drive units 60 have the same shape. Therefore, in the following description, unless otherwise specified, only the lens drive unit 60 corresponding to the second lens unit 32 will be described, and the lens drive unit 60 corresponding to the third lens unit 33 will be omitted. In addition, in this embodiment, the lens drive units 60 are arranged symmetrically in the X and Y directions. Therefore, the relationship between the positive and negative sides in the lens drive unit 60 corresponding to the third lens unit 33 is opposite to the relationship between the positive and negative sides in the lens drive unit 60 corresponding to the second lens unit 32.

[0093] The lens driving section 60 includes a driving shaft 61 , a frame 62 , a connecting portion 63 , an interposing portion 64 , and an ultrasonic motor 65 .

[0094] The drive shaft 61 is a shaft made of non-magnetic or low-magnetic ceramic (e.g., zirconia) for moving the frame 62 in the Y direction and extends in the Y direction. The drive shaft 61 is supported by the drive support portion 112C of the second wall 112 and the drive support portion 113B of the third wall 113 and is located on the - side of the guide shaft 50 in the Z direction. The drive shafts 61 are located on both sides of the third wall 113 in the X direction, so that the two drive shafts 61 are equidistant from the optical axis O.

[0095] The two drive shafts 61 are configured to have a length substantially equal to the length from the second wall 112 to the third wall 113 and to be longer than the guide shaft 50. The drive shafts 61 are configured to be thinner than the guide shaft 50.

[0096] The drive shaft 61 on the + side in the X direction corresponds to the “first drive shaft” of the present invention, and the drive shaft 61 on the − side in the X direction corresponds to the “second drive shaft” of the present invention.

[0097] The frame 62 is connected to one of the supported portions 32B and 33B of the second lens unit 32 and the third lens unit 33 via the connecting portion 63 .

[0098] The frame 62 on the + side in the X direction corresponds to the “first frame” of the present invention, and the frame 62 on the − side in the X direction corresponds to the “second frame” of the present invention.

[0099] The frame 62 is supported by the drive shaft 61 so as to be movable in the Y direction. As the frame 62 moves along the drive shaft 61 , the second lens unit 32 or the third lens unit 33 connected to the frame 62 via the connection portion 63 also moves along the guide shaft 50 .

[0100] In addition, in this embodiment, the frame 62 is configured to have a length longer than its movable distance. Specifically, the length of the frame 62 in the Y direction is longer than the movable distance of the frame 62 in the housing 10 .

[0101] In addition, if Figure 9 As shown, a magnet portion 621 for position detection is provided on the - side portion of the frame 62 in the Z direction. The magnet portion 621 includes two magnets 621A and 621B arranged in the X direction. The magnet portion 621 is, for example, disposed in a recess formed on the - side surface of the frame 62 in the Z direction.

[0102] Furthermore, a position detector 70 is provided in the portion of the housing 10 that faces the magnet portion 621. The position detector 70 is, for example, a Hall element that detects the position of the frame 62 in the Y direction, and detects the position of the magnet portion 621 based on a predetermined reference position. The predetermined reference position is a position common to both magnets 621A and 621B, and is set at an appropriate position, such as the end portion of the bottom wall portion 12 in the Y direction, on the positive or negative side.

[0103] In the magnet unit 621, one magnet 621A is arranged so that its north pole faces the position detector 70, and the other magnet 621B is arranged so that its south pole faces the position detector 70. In other words, the two magnets 621A and 621B are magnetized so that different poles face the position detector 70 along the direction in which the magnet unit 621 and the position detector 70 face each other (the Z direction in this embodiment).

[0104] The magnets 621A and 621B are arranged in contact with each other. Therefore, different poles are arranged adjacent to each other on a facing surface 621C of the magnet portion 621 that faces the position detection portion 70 .

[0105] In addition, if Figure 10A 、 Figure 10B and Figure 10C As shown in FIG. 6 , the magnet portion 621 is arranged to be tilted with respect to the Y direction. That is, the boundary 621D between different poles in the magnet portion 621 extends to be tilted with respect to the optical axis.

[0106] By doing so, the ratio of the north poles and the south poles in the facing portion between the position detecting unit 70 and the magnet portion 621 can be changed according to the movement of the frame 62 in the Z direction.

[0107] For example, Figure 10A As shown, when the frame 62 is positioned furthest to the - side in the Y direction, the position detector 70 faces the + side end of the magnet 621 in the Y direction. The position detector 70 faces the portion of the end where the S pole magnet 621B occupies a larger proportion.

[0108] When the frame 62 moves toward the positive side in the Y direction, the magnet 621 also moves with the frame 62, so the portion of the magnet 621 facing the position detector 70 also changes. Since the magnet 621 is tilted, the proportion of the north pole in the portion facing the position detector 70 gradually increases.

[0109] like Figure 10B As shown, when the frame 62 moves to a position where the position detection unit 70 faces the center portion of the frame 62 , the portion where the proportion of the S pole (magnet 621B) and the proportion of the N pole (magnet 621A) are approximately equal becomes the portion facing the position detection unit 70 .

[0110] In addition, if Figure 10C As shown, when the frame 62 moves to a position where the position detector 70 faces the end portion on the - side in the Y direction of the frame 62 , the portion where the N pole (magnet 621A) occupies a larger proportion becomes the portion facing the position detector 70 .

[0111] Thus, the intensity of the magnetic force detected by the position detection unit 70 can be made different depending on the position of the frame 62 , so that the position of the frame 62 in the Y direction can be detected with high accuracy by the position detection unit 70 .

[0112] like Figure 11 As shown, the connecting portion 63 is a plate-shaped spring member (elastic member) fixed to the surface on the + side in the Z direction of the frame 62 and fixed to the surface on the - side in the Y direction of one of the supported portions 32B and 33B of the second lens unit 32 and the third lens unit 33. By forming the connecting portion 63 from a spring member, even if the positional relationship between the frame 62 and the supported portions 32B and 33B deviates due to manufacturing tolerances or the like, the elastic force of the spring member can absorb the deviation.

[0113] The connection portion 63 on the + side in the X direction corresponds to the “first elastic member” of the present invention, and the connection portion 63 on the − side in the X direction corresponds to the “second elastic member” of the present invention.

[0114] The clamping portion 64 is formed, for example, from a plate-shaped metal member and is fixed to the surface of the frame 62 opposite the lens portion. The clamping portion 64 includes a main body portion 641 and a contact portion 642. The clamping portion 64 on the positive side in the X direction corresponds to the "first clamping portion" of the present invention, while the clamping portion 64 on the negative side in the X direction corresponds to the "second clamping portion" of the present invention.

[0115] like Figure 11 and Figure 12As shown, the main body 641 has a plane parallel to the direction of the optical axis (Y direction) and is bonded to the frame 62. In this embodiment, the length of the main body 641 in the Y direction is shorter than the length of the frame 62 in the Y direction (see also FIG. Figure 8 In other words, the length of the frame 62 is longer than the length of the main body 641 .

[0116] The contact portion 642 is the portion with which the transducer of the ultrasonic motor 65 contacts. The contact portion 642 is formed by bending the ends of the main body 641 in the Z direction toward the side opposite the lens portion. In other words, the main body 641 is disposed between the pair of contact portions 642 to connect them.

[0117] By constructing the contact portion 642 in this way, a force is applied from the vibrator of the ultrasonic motor 65 to the contact portion 642, thereby generating a thrust in the direction of the optical axis (Y direction) in the clamping portion 64. As a result, a thrust for moving along the direction of the optical axis (Y direction) can be imparted from the clamping portion 64 to the frame 62.

[0118] In addition, if Figure 12 As shown, a plurality of openings 643 are formed at the connection portion between the main body portion 641 and the contact portion 642. Specifically, five openings 643 of the same size are formed at the connection portion on both sides in the Z direction.

[0119] Due to the formation of the opening 643 , the connection portion connects the plate-shaped portion 641A of the main body 641 and the contact portion 642 , and comprises six connection portions 641B arranged at intervals in the direction of the optical axis.

[0120] In this embodiment, the width of each connecting portion 641B in the Y direction (the direction of the optical axis) is such that the closer the connecting portion 641B is to the outside of the center in the Y direction, the wider it is. In other words, the width of the connecting portion 641B in the center in the Y direction is narrower than the width of the connecting portions 641B at the two end sides in the Y direction.

[0121] like Figure 6 and Figure 13 As shown, the ultrasonic motor 65 is a driving source for generating a driving force for moving the frame 62, and is fixedly disposed on the respective placement portions 111A of the pair of first walls 111. Figure 14 As shown, the ultrasonic motor 65 includes a resonance portion 651 , a piezoelectric element 652 , a first electrode 653 , and a second electrode 654 .

[0122] The ultrasonic motor 65 on the + side in the X direction corresponds to the “first ultrasonic motor” of the present invention, and the ultrasonic motor 65 on the − side in the X direction corresponds to the “second ultrasonic motor” of the present invention.

[0123] The resonance portion 651 is formed of, for example, a conductive material, and resonates with the vibration of the piezoelectric element 652, converting the vibration motion into linear motion of the frame 62. Specifically, based on the vibration of the piezoelectric element 652, the resonance portion 651 vibrates in a direction inclined relative to the direction of the optical axis (Y direction) and presses the clamping portion 64, thereby generating a thrust for the frame 62 to move along the optical axis through the clamping portion 64. The resonance portion 651 is configured so as to be sandwiched between the two contact portions 642 in the clamping portion 64. Figure 14 and Figure 15 As shown, the resonance portion 651 includes a body portion 651A, two vibrators 651B, a protruding portion 651C, and a current-carrying portion 651D.

[0124] The trunk portion 651A is, for example, a substantially rectangular portion and is sandwiched between the piezoelectric element 652. Two vibrators 651B extend in the Y direction from both ends of the trunk portion 651A in the Z direction. The two vibrators 651B have symmetrical shapes, and their free ends contact the contact portion 642 of the sandwiching portion 64. The two vibrators 651B correspond to the "first vibrator" and "second vibrator" of the present invention.

[0125] The protrusion 651C extends from the center of the trunk portion 651A in the Z direction toward the positive side in the Y direction. The conducting portion 651D extends from the center of the trunk portion 651A in the Z direction toward the opposite side (the negative side in the Y direction) from the protrusion 651C.

[0126] The piezoelectric element 652 is a plate-shaped vibrating element made of, for example, ceramic material, and vibrates when a high-frequency voltage is applied. Two piezoelectric elements 652 are provided, and are arranged to sandwich the body 651A of the resonance portion 651 in the X direction.

[0127] The first electrode 653 includes a clamping portion 653A that clamps the resonating portion 651 and the piezoelectric element 652, and an electrode portion 653B to which a voltage is applied. The first electrode 653 applies a voltage to the piezoelectric element 652 via the clamping portion 653A that clamps the piezoelectric element 652. The second electrode 654 is electrically connected to the current-carrying portion 651D of the resonating portion 651. The first and second electrodes 653 and 654 are electrically connected to predetermined wiring of the camera-mounted device.

[0128] The two piezoelectric elements 652 are attached to the body 651A of the resonance portion 651 and are electrically connected to each other by being sandwiched between the first electrodes 653. For example, one end of the power supply path is connected to the first electrode 653, and the other end is connected to the second electrode 654. This applies a voltage to the piezoelectric elements 652, causing them to vibrate.

[0129] The resonating portion 651 has at least two resonant frequencies and deforms in different motions corresponding to each resonant frequency. In other words, the overall shape of the resonating portion 651 is configured so that it deforms in different motions corresponding to the two resonant frequencies. These different motions are: moving the frame 62 toward the positive side in the Y direction by means of the clamping portion 64; and moving the frame 62 toward the negative side in the Y direction by means of the clamping portion 64.

[0130] like Figure 16 As shown, the resonance portion 651 is configured so that one of the pair of contact portions 642 of the clamping portion 64 is opposite to the vibrator 651B, so that when the two vibrators 651B are deformed, the front end of the vibrator 651B presses the contact portion 642 from the side opposite to each contact portion 642 in a direction inclined relative to the Y direction (see arrow A).

[0131] When each contact portion 642 is pressed in the direction of arrow A by the front end of vibrator 651B, a reaction force is generated on each contact portion 642, which tends to return toward vibrator 651B. In other words, the interposition portion 64 generates a reaction force directed from the outside toward the inside of the pair of contact portions 642 due to the contact between each vibrator 651B and the pair of contact portions 642. The portion of the interposition portion 64 that includes the contact portions 642 corresponds to the "pressing portion" of the present invention.

[0132] The reaction force of the intervening portion 64 against the pressure of the vibrator 651B generates friction between the vibrator 651B and the contact portion 642. This friction generates a thrust in the Y direction on the intervening portion 64. This thrust is applied to the frame 62 bonded to the intervening portion 64, causing it to move in the Y direction (see arrow B). As a result, the second lens unit 32 or the third lens unit 33 connected to the frame 62 moves in the Y direction.

[0133] Furthermore, by configuring contact portion 642 to extend in the Y direction, contact portion 642, pressed by vibrator 651B, slides against vibrator 651B and moves in the Y direction while in contact. Consequently, contact portion 642 is continuously pressed by vibrator 651B, enabling frame 62, bonded to interposing portion 64, to continuously move in the Y direction. Furthermore, at one resonant frequency, the pressing direction of vibrator 651B is in the direction of arrow A, while the sliding direction of contact portion 642 is in the direction of arrow B. Meanwhile, at another resonant frequency, the pressing direction of vibrator 651B is in the direction of arrow C, while the sliding direction of contact portion 642 is in the direction of arrow D.

[0134] Such driving operation is performed by ultrasonic motors 65 provided on each of the first walls 111 on both sides in the X direction. That is, each ultrasonic motor 65 independently drives the second lens unit 32 and the third lens unit 33 along the optical axis.

[0135] However, if the two ultrasonic motors 65 are disposed on the same first wall 111, the two movable frames 62 must also be disposed on the side of the first wall 111. Consequently, the frames 62 interfere with each other, narrowing their respective ranges of movement. This in turn narrows the ranges of movement of the second lens unit 32 and the third lens unit 33. Therefore, to ensure this range of movement, the length of the housing 10 in the Y direction must be increased.

[0136] In contrast, in this embodiment, one of the two ultrasonic motors 65 is disposed on each of a pair of first walls 111 located on opposite sides of the optical axis. This allows the space adjacent to each first wall 111 to be used as a dedicated range of movement for each of the two frames 62. As a result, the volume of the housing 10 can be efficiently utilized for the lens drive unit 60, thereby expanding the range of movement of the second lens unit 32 and the third lens unit 33 without increasing the length of the housing 10 in the Y direction.

[0137] In addition, in this embodiment, the movement range of the second lens unit 32 and the third lens unit 33 is expanded, thereby increasing the degree of freedom in selecting each lens. Furthermore, regarding the zoom function, the magnification range in the lens section 30 can be expanded, and regarding the focus function, the depth of field can be increased.

[0138] Furthermore, in this embodiment, the lens drive unit 60 uses an ultrasonic motor 65 formed by laminating together relatively thin plate-like components such as a resonator 651 and a piezoelectric element 652. This reduces the space required to accommodate the drive source. Consequently, the camera module 1 (lens drive device) can be made more compact compared to a configuration using a stepping motor or the like as the drive source.

[0139] Furthermore, in this embodiment, the ultrasonic motors 65 are provided on both sides of the optical axis, so that the weight distribution in the housing 10 can be made uniform in the X direction, and the resistance of the device to vibration, dropping, etc. can be improved.

[0140] In addition, in this embodiment, the guide shaft 50 and the drive shaft 61 are provided on both sides of the optical axis, so that the inclination of the second lens unit 32 and the third lens unit 33 , which are movable parts during driving, can be reduced.

[0141] Furthermore, in this embodiment, each guide shaft 50 is equidistant from the optical axis and has the same length, and each drive shaft 61 is equidistant from the optical axis and has the same length, thereby achieving an even weight balance of the device in the X direction. Consequently, the device's resistance to vibration, drops, and the like can be improved.

[0142] Furthermore, in this embodiment, the sandwiching portion 64 is configured so that the contact portion 642 sandwiches the vibrator 651B of the ultrasonic motor 65. This allows the contact portion 642 of the sandwiching portion 64 to pass on both sides of each vibrator 651B in the Z direction. In other words, the movement of the contact portion 642 does not interfere with the vibrator 651B. As a result, the range of movement of the sandwiching portion 64 can be expanded, thereby expanding the range of movement of the frame 62 and the movable portion.

[0143] Furthermore, in this embodiment, the width of each connecting portion 641B in the clamping portion 64 in the Y direction (direction of the optical axis) is greater the further outward from the center in the Y direction the connecting portion 641B is located. This allows the pressing force exerted by the vibrator 651B at each position on the contact portion 642 to be uniformly applied in the Y direction. As a result, in a device such as a smartphone, even when performing a stepless optical zoom function, the clamping portion 64 can stably generate a moving force even when the movable portion is moved over a relatively long range of motion (e.g., 8 mm).

[0144] Furthermore, in the present embodiment, the frame 62 is configured to be longer than its own movable distance, thereby suppressing excessive movement of the frame 62. As a result, the operational stability of the device can be improved.

[0145] However, for example, if the intervening portion 64 extends from the frame 62 , when the vibrator 651B presses the extended portion of the intervening portion 64 , the direction of the force applied to the intervening portion 64 is likely to change, and the frame 62 may be tilted.

[0146] In contrast, in this embodiment, the length of the frame 62 is longer than the length of the clamping portion 64 (main body 641 ), thereby suppressing the direction change of the force applied to the clamping portion 64 and improving the operational stability of the device.

[0147] In addition, in this embodiment, the drive shaft 61 is made of non-magnetic or low-magnetic ceramics, which can suppress the influence on the detection accuracy of the position detector 70 that detects the position of the frame 62. As a result, the position detection accuracy of the position detector 70 can be improved.

[0148] Furthermore, by constructing the drive shaft 61 from a ceramic material such as zirconia, it can be manufactured with high precision (for example, a diameter accuracy of approximately ±0.5 μm) even with an outer diameter as small as approximately 0.8 mm. Furthermore, due to its relatively high Young's modulus, strength can be improved. Furthermore, its toughness allows it to recover even from momentary bending, providing sufficient resistance to the device even when a heavy glass lens is used as the lens portion.

[0149] Furthermore, in the present embodiment, the drive shaft 61 is supported by the second wall 112 and the third wall 113 , thereby enabling the strength of the housing 10 to be improved.

[0150] In this embodiment, the drive shaft 61 is longer than the guide shaft 50 and is closer to the source of the driving force. This makes it easier to stably drive the frame 62 and the lens unit. As a result, tilting of components within the device can be suppressed.

[0151] Furthermore, when the magnet portion 621 is formed of a single magnet, the boundary between different poles includes a non-magnetic region. Therefore, when the position detector 70 crosses this boundary, the position of the frame 62 may not be detected in the non-magnetic region.

[0152] In contrast, in this embodiment, the two magnets 621A and 621B are brought into contact to form the boundary between different poles in the magnet portion 621. This allows for a state in which no magnetic field exists at the boundary. As a result, the position detection accuracy of the position detector 70 can be further improved.

[0153] Furthermore, in the present embodiment, by expanding the range of movement of the frame 62 , the drive control section 100 can control the driving of the second lens unit 32 and the third lens unit 33 with a resolution of 14 bits or more, for example.

[0154] When the resolution is set to 12 bits, for example, and the frame 62 is moved over a relatively long movement range (eg, 8 mm), the resolution width of the movement of the frame 62 increases, and the second lens unit 32 and the third lens unit 33 may not be driven finely.

[0155] Therefore, in this embodiment, control is performed with a resolution of 14 bits or more, thereby enabling driving of the second lens unit 32 and the third lens unit 33 to be controlled with relatively high accuracy even when the frame 62 is moved over a relatively long range of movement.

[0156] In addition, in the above embodiment, a position detection unit 70 is provided on each frame 62, but the present invention is not limited thereto. For example, it may be Figure 17As shown in FIG. 1 , a plurality of position detection units 70 are provided so as to be aligned in the direction of the optical axis (Y direction). With such a configuration, the accuracy of position detection of the frame 62 can be further improved.

[0157] Furthermore, in the above embodiment, the guide shaft 50 is provided on both sides in the X direction, but the present invention is not limited thereto, and the guide shaft 50 may be provided only on one side in the X direction.

[0158] Furthermore, in the above embodiment, the drive shaft 61 is made of ceramics, but the present invention is not limited thereto. The drive shaft may be made of other materials as long as it is made of a material with relatively low magnetic force.

[0159] Furthermore, 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 thereto, and the bottom wall portion may be adhesively fixed to the side wall portion 11 .

[0160] Furthermore, in the above embodiment, a structure is provided with two movable lenses, namely, the second lens unit 32 and the third lens unit 33. However, the present invention is not limited thereto, and a structure may also be provided with three or more movable lenses. In this case, at least one lens driving unit is provided on each of the pair of first walls.

[0161] Furthermore, in the above embodiment, the structure includes four lens units, but the present invention is not limited thereto, and any number of lens units may be provided as long as the structure includes at least two movable lenses.

[0162] Furthermore, in the above embodiment, the intervening portion 64 is formed by bending a plate-like metal member. However, the present invention is not limited to this, and the intervening portion 64 may be formed in any manner as long as it functions as a pressure-applying portion. For example, the main body and contact portion constituting the intervening portion may be formed of separate components as long as the contact portion can generate a reaction force due to contact with the vibrator.

[0163] Furthermore, in the above embodiment, the frame 62 and the interposing portion 64 are formed of separate components, but the present invention is not limited thereto. For example, the frame 62 and the interposing portion 64 may be formed integrally. In other words, the lens driving portion may include a moving portion that moves in the direction of the optical axis as the resonating portion resonates, and is connected to each lens unit in a manner that transmits this movement in the direction of the optical axis.

[0164] In the above embodiment, the connection portion 63 connecting the frame 62 and the lens unit is formed of a spring member. However, the present invention is not limited thereto, and the connection portion 63 may be formed of any member as long as it has elasticity.

[0165] Furthermore, in the above embodiment, the position of the frame 62 is detected using the magnet portion 621 , but the present invention is not limited thereto, and the position of the frame may be detected using other methods.

[0166] Furthermore, in the above embodiment, the bottom wall portion has a structure having a bent portion or a half-punched hole, but the present invention is not limited thereto, and a structure without a bent portion or a half-punched hole may be sufficient.

[0167] In the above embodiment, the resonance portion 651 has a structure including two vibrators 651B, but the present invention is not limited thereto, and for example, the resonance portion 651 may have a structure including one vibrator.

[0168] In addition, in the above embodiment, the drive control unit, the reflection drive control unit and the camera control unit are provided separately, but the present invention is not limited thereto. At least two of the drive control unit, the reflection drive control unit and the camera control unit may be constituted by one control unit.

[0169] In addition, for example, in the above embodiment, as an example of a camera-mounted device equipped with a camera module 1, a smartphone is used as an example of a portable terminal equipped with a camera. However, the present invention can be applied to a camera-mounted device that includes a camera module and an image processing unit that processes image information obtained by the camera module. The camera-mounted device includes information equipment and transportation equipment. Examples of information equipment include mobile phones equipped with cameras, laptop computers, tablet terminals, portable game consoles, web cameras, drones, and vehicle-mounted devices equipped with cameras (e.g., rear monitoring devices, driving recorders). In addition, examples of transportation equipment include automobiles and drones.

[0170] Figure 19A 、 Figure 19B 1 is a diagram showing a car V as a camera-mounted device equipped with a vehicle-mounted camera module VC (Vehicle Camera). Figure 19A This is the main view of the car V, Figure 19B 1 is a perspective view of the rear of a car V. The car V is equipped with the camera module 1 described in the embodiment as a vehicle-mounted camera module VC. Figure 19A and Figure 19B As shown, the vehicle-mounted camera module VC is mounted on a windshield facing forward or on a tailgate facing backward. The vehicle-mounted camera module VC is used for rear monitoring, driving recorder, collision avoidance control, autonomous driving control, and the like.

[0171] Furthermore, the above embodiments are merely examples of specific implementations of the present invention, and the technical scope of the present invention should not be limited by these embodiments. That is, the present invention can be implemented in various forms without departing from its main points or features. For example, the shapes, sizes, numbers, and materials of the various components described in the above embodiments are merely examples and can be appropriately modified for implementation.

[0172] The disclosure of Japanese Patent Application No. 2019-236300 filed on December 26, 2019 including the specification, drawings and abstract is incorporated herein by reference in its entirety.

[0173] Industrial Applicability

[0174] The lens driving device of the present invention is useful as a lens driving device, a camera module, and a camera-mounted device capable of achieving miniaturization while ensuring the movable range of the movable lens.

[0175] Description of Reference Numerals

[0176] 1 Camera module

[0177] 10 Housing

[0178] 11 Side wall

[0179] 12 Bottom wall

[0180] 20 Reflection drive unit

[0181] 21 Reflective Shell

[0182] 22 Reflector

[0183] 23 Reflection drive control unit

[0184] 30 Lens

[0185] 31 First lens unit

[0186] 32 Second lens unit

[0187] 32A Main body

[0188] 32B supported part

[0189] 33 Third lens unit

[0190] 33A Main body

[0191] 33B supported part

[0192] 34 Fourth lens unit

[0193] 34A convex part

[0194] 40 Camera Department

[0195] 50 guide shaft

[0196] 60 Lens drive unit

[0197] 61 drive shaft

[0198] 62 Frame

[0199] 63 connection

[0200] 64 Clamping Department

[0201] 65 Ultrasonic Motor

[0202] 70 Position detection unit

[0203] 100 Drive control unit

[0204] 111 First Wall

[0205] 111A Configuration Department

[0206] 111B Engaged part

[0207] 112 Second Wall

[0208] 112A Guide support part

[0209] 112B Configuration Department

[0210] 112C drive support

[0211] 112D opening

[0212] 113 The Third Wall

[0213] 113A Guide support part

[0214] 113B drive support

[0215] 114 The Fourth Wall

[0216] 121 Positioning unit

[0217] 122 bending part

[0218] 123 Half Punching

[0219] 200 Camera Control Unit

[0220] 621 Magnet Department

[0221] 621A Magnet

[0222] 621B Magnet

[0223] 621C Opposite side

[0224] 621D Boundary

[0225] 641 Main body

[0226] 641A plate-shaped part

[0227] 641B connection

[0228] 642 Contact Department

[0229] 643 Opening

[0230] 651 Resonance

[0231] 651A Torso

[0232] 651B Vibrator

[0233] 651C protrusion

[0234] 651D Power supply unit

[0235] 652 Piezoelectric Element

[0236] 653 First Electrode

[0237] 653A Clamping part

[0238] 653B Electrode Department

[0239] 654 Second Electrode

Claims

1. A lens driving device comprising: A first movable portion and a second movable portion are arranged along the optical axis and capable of holding the first movable lens and the second movable lens, respectively; a first driving portion and a second driving portion disposed on opposite sides of the optical axis and configured to drive the first movable portion and the second movable portion along the direction of the optical axis; A pair of wall portions extending in the direction of the optical axis on both sides of the optical axis and sandwiching the first movable portion and the second movable portion, the first drive portion and the second drive portion being arranged on the both sides. The first driving portion and the second driving portion each include a first ultrasonic motor disposed on one wall portion of the pair of wall portions and a second ultrasonic motor disposed on the other wall portion of the pair of wall portions. The first driving portion includes a first frame and a first driving shaft. With respect to the optical axis, the first frame and the first driving shaft are both arranged on a side where the first ultrasonic motor is arranged. The second driving portion has a second frame and a second driving shaft. With respect to the optical axis, the second frame and the second driving shaft are both arranged on a side where the second ultrasonic motor is arranged. The first frame is connected to the first movable part on the one wall side and is given a thrust to move in the direction of the optical axis by the first ultrasonic motor. The second frame is connected to the second movable part on the other wall side and is given a thrust to move in the direction of the optical axis by the second ultrasonic motor. The first ultrasonic motor and the second ultrasonic motor independently drive the first movable portion and the second movable portion along the direction of the optical axis.

2. The lens driving device according to claim 1, wherein: The invention further comprises a guide portion arranged on both sides relative to the optical axis, the first ultrasonic motor and the second ultrasonic motor being arranged on both sides, the guide portion supporting each of the first movable portion and the second movable portion on both sides in a manner that enables the movable portion to move along the direction of the optical axis.

3. The lens driving device according to claim 2, wherein: The guide portion includes a first guide shaft and a second guide shaft extending along the optical axis on both sides. The first guide axis and the second guide axis are equidistant from the optical axis and have the same length.

4. The lens driving device according to any one of claims 1 to 3, wherein: The first driving shaft extends in the direction of the optical axis and supports the first frame in a manner such that the first frame can move in the direction of the optical axis. The second driving shaft extends in the direction of the optical axis and supports the second frame in a manner such that the second frame is movable in the direction of the optical axis.

5. The lens driving device according to claim 4, wherein: The first driving axis and the second driving axis are equidistant from the optical axis and have the same length.

6. The lens driving device according to claim 5, wherein: A housing is provided, the housing accommodating at least the first movable portion, the second movable portion, the first driving portion, and the second driving portion, The housing includes the pair of wall portions and wall portions on both end sides in the direction of the optical axis connected to respective ends of the pair of wall portions in the direction of the optical axis. The first drive shaft and the second drive shaft are supported by wall portions on both end sides in the direction of the optical axis.

7. The lens driving device according to claim 5, wherein: The first ultrasonic motor and the second ultrasonic motor each have a resonance portion composed of a first vibrator and a second vibrator that resonate. The first driving portion and the second driving portion each have a sandwiching portion sandwiched between the first ultrasonic motor and the first frame, and a sandwiching portion sandwiched between the second ultrasonic motor and the second frame. The clamping portion has: a pair of contact portions, arranged so as to sandwich the resonating portion and respectively in contact with the first vibrator and the second vibrator; and The main body connects the pair of contact parts.

8. The lens driving device according to claim 7, wherein: The interposing portion includes a pressing portion configured to generate a reaction force in a direction from outside to inside the pair of contact portions when the first vibrator and the second vibrator come into contact with the pair of contact portions.

9. The lens driving device according to claim 7, wherein: The main body of the clamping portion includes a plate-shaped portion extending in the direction of the optical axis, and a plurality of connecting portions arranged at intervals in the direction of the optical axis, wherein the connecting portion is a connecting portion connecting the plate-shaped portion to one of the pair of contact portions. Among the plurality of connection portions, a connection portion located further outward from a center portion of the plate-shaped portion in the direction of the optical axis has a larger width.

10. The lens driving device according to claim 7, wherein: Each of the first frame and the second frame is longer than the intervening portion in the direction of the optical axis, and each of the first frame and the second frame includes a magnet portion for position detection extending in the direction of the optical axis.

11. The lens driving device according to claim 10, wherein: A position detection unit is provided. The position detection unit is disposed so as to face the magnet portions in the first frame and the second frame, and detects the position of the magnet portion based on a predetermined reference position.

12. The lens driving device according to claim 11, wherein: The magnet portion has an opposing surface facing the position detecting portion, and different poles are adjacently arranged on the opposing surface, with a boundary between the different poles extending obliquely with respect to the optical axis.

13. The lens driving device according to claim 12, wherein: The magnet portion has two magnets. The two magnets are magnetized in a direction along an opposing direction in which the magnet portions and the position detecting portion oppose each other so that the different poles oppose the position detecting portion.

14. The lens driving device according to claim 11, wherein: A plurality of the position detection units are provided so as to be aligned in the direction of the optical axis.

15. The lens driving device according to claim 7, wherein: The first frame and the second frame are configured to be longer than their own movable distances.

16. The lens driving device according to claim 5, wherein: The first drive shaft and the second drive shaft are made of ceramic.

17. The lens driving device according to claim 5, wherein: The first frame is connected to the first movable part by means of a first elastic component. The second frame is connected to the second movable portion via a second elastic member.

18. The lens driving device according to claim 1, wherein: A housing is provided, the housing accommodating at least the first movable portion, the second movable portion, the first driving portion, and the second driving portion, The housing includes: the pair of wall portions; and a metal plate connecting the pair of wall portions in a bridging manner.

19. The lens driving device according to claim 18, wherein: The metal plate connects the bottoms of the pair of wall portions in a bridging manner. The metal plate is configured such that an end portion of the metal plate located on the light incident side in the direction of the optical axis is bent toward the wall portion.

20. The lens driving device according to claim 18, wherein: The metal plate has a plurality of half-punched holes arranged in the direction of the optical axis.

21. The lens driving device according to claim 18, wherein: The pair of wall portions are made of resin, The metal plate is integrated with the pair of wall portions by insert molding.

22. The lens driving device according to claim 18, wherein: The pair of wall portions are each arranged at a position a predetermined distance from the optical axis.

23. The lens driving device according to claim 1, wherein: Each of the first ultrasonic motor and the second ultrasonic motor includes: a vibration element that generates vibration by application of a high-frequency voltage; and a resonance portion that resonates with the vibration of the vibration element so as to vibrate in an oblique direction oblique to the direction of the optical axis. The first driving unit and the second driving unit each include a moving portion that moves in the direction of the optical axis as the resonance portion resonates and is connected to the first movable portion and the second movable portion to transmit the movement in the direction of the optical axis.

24. The lens driving device according to claim 23, wherein: The moving part has: The first frame and the second frame are respectively supported in a manner capable of moving in the direction of the optical axis; as well as The first clamping portion and the second clamping portion are respectively arranged in contact with the resonance portion so as to slide in the direction of the optical axis by being pressed from the resonance portion in the inclined direction, and are respectively fixed to the first frame and the second frame. The first frame is connected to the first movable part by means of a first elastic component. The second frame is connected to the second movable portion via a second elastic member.

25. The lens driving device according to claim 1, wherein: A drive control unit is provided that controls driving of the first movable unit and the second movable unit with a resolution of 14 bits or more.

26. A camera module comprising: The lens driving device according to claim 1; a lens section including the first movable lens and the second movable lens held by the first movable section and the second movable section; and an imaging unit for capturing an image of an object formed by the lens unit; The camera module drives the first movable lens and the second movable lens along the direction of the optical axis.

27. A camera-mounted device, which is information equipment or transportation equipment, comprising: The camera module of claim 26; and The imaging control unit processes the image information obtained by the camera module.

Images