Drive device, camera module, and camera mounting device

Abstract

In a drive device, a camera module, and a camera mounting device, the drive device includes: a drive holder that supports a lens unit; a housing accommodating the driving bracket; a shaft part for supporting the driving bracket; and a drive unit that moves the drive bracket, the drive bracket having a moving unit supported by the shaft unit, and a metal member embedded in the drive bracket, the metal member having a shape that follows the moving unit.

Description

[0001] This application is a divisional application of the Chinese invention patent application with application date of June 24, 2021, application number 202180048872.3, invention name “Lens drive device, camera module and camera mounting device”, and applicant being Mitsumi Electric Co., Ltd. Technical Field

[0002] The invention relates to a lens driving device, a camera module and a camera mounting device. Background Art

[0003] Conventionally, there are known camera modules mounted on thin camera-mounted devices such as smartphones. As such camera modules, there are known camera modules including a lens driving device having a zoom function for enlarging or reducing an image of a subject.

[0004] For example, Patent Document 1 discloses a structure including: a fixed lens on which light from a subject is incident; two movable lenses on which light refracted by the fixed lens is incident; and a lens driving unit that moves the two movable lenses in the direction of the optical axis.

[0005] Prior art literature

[0006] Patent Literature

[0007] Patent Document 1: Japanese Patent Application Publication No. 2018-36416 Summary of the invention

[0008] Problem that the invention aims to solve

[0009] However, from the viewpoint of miniaturization of the camera-mounted device, for example, an ultrasonic motor may be used as a driving unit. In the case where an ultrasonic motor is used as a driving unit, for example, a structure in which a movable unit holding a movable lens and a driving bracket transmitting the driving force of the ultrasonic motor to the movable unit are separately provided can be considered.

[0010] In this structure, for example, two guide shafts are provided, namely, a guide shaft for a driving bracket and a guide shaft for a movable part, the driving bracket and the movable part are connected by a connecting component (a spring component for absorbing the position deviation between the driving bracket and the movable part, etc.), and the driving force is transmitted to the movable part through the driving bracket to move the movable lens.

[0011] In order to manage the position of the movable part, a magnet part for position detection is provided in the driving bracket, for example, and the position of the movable part is detected by detecting the position of the driving bracket.

[0012] However, if the structure in which the driving bracket and the movable part move separately is adopted as described above, there is a possibility that the response delay of the driving force from the driving bracket to the movable part or the tilt of the movable part may occur. In addition, if a structure is adopted in which the position of the movable part is detected by detecting the position of the driving bracket, the position of the movable part may not be managed with high accuracy because the position of the movable part is not directly detected.

[0013] An object of the present invention is to provide a lens driving device, a camera module, and a camera mounting device that can suppress a response delay of a driving force applied to a movable portion and an inclination of the movable portion and manage the position of the movable portion with high accuracy.

[0014] Solutions to the problem

[0015] A driving device according to one embodiment of the present invention includes:

[0016] A driving bracket, supporting the lens unit;

[0017] A housing for accommodating the driving bracket;

[0018] a shaft portion, supporting the driving bracket; and

[0019] A driving unit is provided to move the driving bracket.

[0020] The driving bracket has a moving portion supported by the shaft portion,

[0021] A metal component is embedded in the driving bracket.

[0022] The metal member has a shape along the moving portion.

[0023] A camera module according to one embodiment of the present invention includes:

[0024] The above-mentioned driving device;

[0025] a lens held by the lens unit; and

[0026] The imaging unit captures an image of the object formed by the lens.

[0027] The lens driving device of the present invention comprises:

[0028] A movable portion capable of holding a movable lens;

[0029] a driving unit having an ultrasonic motor for driving the movable unit along the direction of the optical axis; and

[0030] a shaft portion extending in the direction of the optical axis and supporting the movable portion,

[0031] The driving unit has:

[0032] a moving portion supported by the shaft portion so as to be movable in the direction of the optical axis; and

[0033] The support portion is connected to the moving portion and supports the movable portion at a position closer to the optical axis than the shaft portion.

[0034] A camera module according to one embodiment of the present invention includes:

[0035] The lens driving device mentioned above;

[0036] a lens section including the movable lens held by the movable section; and

[0037] an imaging unit for capturing an image of an object formed by the lens unit,

[0038] The camera module drives the movable lens along the direction of the optical axis.

[0039] The camera-mounted device of the present invention is an information device or a transportation device, and comprises:

[0040] The camera module mentioned above; and

[0041] The imaging control unit processes the image information obtained by the camera module.

[0042] Effects of the Invention

[0043] According to the present invention, it is possible to manage the position of the movable part with high accuracy while suppressing a response delay of the driving force applied to the movable part and an inclination of the movable part. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a diagram simply showing a camera module according to an embodiment of the present invention.

[0045] Figure 2 This is a diagram simply showing the structure of the camera module according to the present embodiment as seen from the side.

[0046] Figure 3 It is a perspective view showing a casing portion of a camera module.

[0047] Figure 4 It is a perspective view of the bottom wall portion of the housing portion of the camera module.

[0048] Figure 5 It is an exploded perspective view of the housing and the lens unit.

[0049] Figure 6 It is an exploded perspective view of the side wall and the bottom wall in the housing.

[0050] Figure 7This is a diagram of the casing viewed from the + side in the Z direction.

[0051] Figure 8 It is an exploded perspective view of the drive bracket and the clamping part.

[0052] Fig. 9 It is a diagram showing a second intervening member.

[0053] Fig.10 It is a diagram showing the arrangement relationship between the interposing portion and the ultrasonic motor.

[0054] Fig.11 It is a three-dimensional diagram of an ultrasonic motor.

[0055] Fig.12 It is an exploded perspective view of an ultrasonic motor.

[0056] Fig.13 This is an enlarged view of the contact portion between the resonance portion and the interposition portion.

[0057] Fig.14A A view of the drive bracket viewed from the - side in the Y direction.

[0058] Fig. 14B is a cross-sectional view of the drive bracket.

[0059] Fig.15A It is a diagram for explaining the positional relationship between the magnet and the position detection unit.

[0060] Fig. 15B It is a diagram for explaining the positional relationship between the magnet and the position detection unit.

[0061] Fig. 15C It is a diagram for explaining the positional relationship between the magnet and the position detection unit.

[0062] Fig.16A The diagram shows a smartphone equipped with a camera module.

[0063] Fig. 16B The diagram shows a smartphone equipped with a camera module.

[0064] Fig.17A This is a diagram showing a car equipped with a camera module.

[0065] Fig. 17B This is a diagram showing a car equipped with a camera module. DETAILED DESCRIPTION

[0066] Hereinafter, embodiments of the present invention will be described in detail based on the drawings. Figure 1 This is a diagram simply showing a camera module 1 according to an embodiment of the present invention. Figure 2This is a diagram simply showing the structure of the camera module 1 according to the present embodiment as seen from the side.

[0067] The camera module 1 is mounted on, for example, a smartphone M (see Fig.16A , Fig. 16B ), thin camera-mounted devices such as mobile phones, digital cameras, notebook computers, tablet terminals, portable game consoles, and car cameras.

[0068] In the description of the structure of the camera module 1 of the present embodiment, an orthogonal coordinate system (X, Y, Z) is used. In the following figures, the same orthogonal coordinate system (X, Y, Z) is also used for representation. For example, the camera module 1 is mounted in the following manner, that is, when the camera mounting device actually performs 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 object is incident from the Z direction - side (negative side), and after refraction, it is guided to the Y direction + side (positive side). By reducing the thickness of the camera module 1 in the Z direction, the camera mounting device can be made thinner.

[0069] like Figure 1 As shown, the camera module 1 includes a housing 10, a reflection driving unit 20, a lens unit 30, an imaging unit 40, and a shaft unit 50 (see Figure 3 )、The lens driving unit 60 (refer to Figure 3 )、position detection unit 70 (refer to Figure 7 ) and a drive control unit 100.

[0070] The drive control section 100 includes a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), etc. The CPU reads out 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 section 60. Thus, the drive control section 100 drives the second lens unit 32 and the third lens unit 33 described later of the lens section 30 accommodated in the housing 10 along the Y direction (the direction of the optical axis). As a result, the camera module 1 performs stepless optical zoom and automatic focusing. The housing 10, the shaft 50, the lens drive section 60, the position detection section 70 and the drive control section 100 correspond to the "lens drive device" of the present invention.

[0071] 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 example shown, the reflective housing 21 is arranged adjacent to the end of the - side in the Y direction of the housing 10. The reflective mirror 22 is provided in the reflective housing 21, and reflects the incident light L1 as reflected light L2 toward the housing 10. The reflective drive control unit 23 has a CPU, ROM, RAM, etc., and controls the direction of the reflective mirror 22.

[0072] In addition, the reflector 22 of this embodiment has two rotation axes (not shown) extending in the X direction and the Y direction. In the reflection drive unit 20, the reflector 22 rotates around the rotation axes under the control of the reflection drive control unit 23. As a result, the camera module 1 has a shake correction function (OIS (Optical Image Stabilization) function) that optically corrects the shake (vibration) generated during shooting to reduce image blur.

[0073] The reflected light L2 that has entered the housing 10 is output to the imaging unit 40 via the lens unit 30 accommodated in the housing 10 .

[0074] The imaging unit 40 is disposed on the outer side surface (second wall 112 described later) on the positive side in the Y direction of the housing 10, 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).

[0075] 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 the image of the object formed by the lens unit 30 and outputs an electrical signal corresponding to the image of the object.

[0076] In addition, a printed wiring substrate (not shown) is electrically connected to the substrate of the camera unit 40, and power is supplied to the camera element and an electrical signal of the image of the object captured by the camera element is output through the printed wiring substrate. The electrical signal is output to the camera control unit 200 provided in the camera mounting device. The camera control unit 200 includes a CPU, a ROM, a RAM, etc., and processes the image information obtained by the camera module 1. The camera control unit 200 only needs to be mounted on the camera mounting device, but it can also be built into the camera module 1.

[0077] like Figure 3 As shown, the housing 10 accommodates the lens unit 30 , the shaft unit 50 and the lens driving unit 60 , and has a rectangular parallelepiped shape as a whole. The housing 10 has a side wall 11 and a bottom wall 12 .

[0078] The side wall portion 11 is a wall portion made of, for example, resin and having a portion opening toward the - 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 Figure 5 wait).

[0079] The first wall 111 is configured to extend in the Y direction, and a pair of the first wall 111 is provided on both sides in the X direction. A placement portion 111A is provided on the inner side surface of the housing 10 on the first wall 111, and the placement portion 111A is used to place the ultrasonic motor described later. The placement portion 111A on the - side of the first wall 111 in the X direction is provided on the + side of the housing 10 in the Y direction, and the placement portion 111A on the + side of the first wall 111 in the X direction is provided on the - side of the housing 10 in the Y direction.

[0080] In addition, if Figure 4 As shown, a terminal arrangement portion 111C is provided on the first wall 111. The terminal arrangement portion 111C includes, for example, a substrate portion 64 arranged inside and outside the housing 10 through a gap formed between the first wall 111 and the bottom wall portion 12 (see Figure 7 The portion of the substrate portion 64 disposed outside the housing 10 is connected to a predetermined wiring of the camera-mounted device.

[0081] In addition, an engaged portion 111B that engages with the positioning portion 121 of the bottom wall portion 12 is formed on the bottom surface (the surface on the − side in the Z direction) of the first wall 111 .

[0082] like Figure 3 and Figure 4 As shown, 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 positive side in the Y direction.

[0083] In addition, an axis support portion 112A and an opening portion 112B are provided on the second wall 112. In the present embodiment, the axis support portion 112A is a hole that supports the first axis 51 and the second axis 52 described later. The axis support portion 112A corresponding to the first axis 51 is provided at a position of the second wall 112 that is closer to the + side in the X direction than the opening portion 112B. The axis support portion 112A corresponding to the second axis 52 is provided at a position of the second wall 112 that is closer to the - side in the X direction than the opening portion 112B. The opening portion 112B is an opening for allowing the light (the above-mentioned reflected light L2) passing through the lens portion 30 to be incident on the imaging element, and is provided at the center portion of the second wall 112 in the X direction.

[0084] like Figure 3 and Figure 5As shown, the third wall 113 is provided at each of the ends on the - side in the Y direction of the pair of first walls 111. The pair of third walls 113 are provided so as to surround the space formed by the first wall 111 and the second wall 112. Between the pair of third walls 113, a gap of a degree that allows the first lens unit 31 of the lens section 30 to enter is provided, and a bridge portion 113A is provided to bridge the ends on the - side in the Z direction of each third wall 113.

[0085] In addition, an axis support portion 113B for supporting a first axis 51 and a second axis 52 described later is provided near the center portion in the Z direction of the pair of third walls 113. The axis support portion 113B corresponding to the first axis 51 is provided on the third wall 113 on the + side in the X direction, and the axis support portion 113B corresponding to the second axis 52 is provided on the third wall 113 on the - side in the X direction.

[0086] The shaft support portion 113B is a long hole, and the length of the long hole in the Z direction is a length corresponding to the arrangement range of the two shaft support portions 112A on the second wall 112. The shaft support portion 113B can support the first shaft 51 and the second shaft 52, which are supported by each of the two shaft support portions 112A on the second wall 112.

[0087] like Figure 5 As shown, the fourth wall 114 constitutes a wall on one side of the space in the Z direction formed by each first wall 111, the third wall 113 corresponding to the first wall 111, and the second wall 112, and is provided in the region corresponding to the third wall 113 in the X direction (see also Figure 7 ). Therefore, a space is left between the fourth walls 114 on both sides in the X direction.

[0088] like Figures 4 to 6 As shown, the bottom wall portion 12 is a metal plate, for example, of a substantially rectangular shape, constituting the bottom wall of the housing 10, and is provided in a manner that bridges the fourth wall 114 on both sides in the X direction with the pair of first walls 111. The bottom wall portion 12 is integrated with the bottom surface portion of the side wall portion 11 including the bottom of the pair of first walls 111 by insert molding. In addition, a portion of the end portion on the - side in the Y direction of the bottom wall portion 12 is cut away so that there is no portion as the bottom wall portion 12 in the portion corresponding to the first lens unit 31.

[0089] Positioning portions 121 are provided at both ends of the bottom wall 12 in the X direction. The positioning portions 121 are provided protruding from both ends of the bottom wall 12 and engage with the engaged portions 111B of the first wall 111. Thus, the bottom wall 12 can be positioned in the Y direction.

[0090] In addition, if Figure 6As shown, a bent portion 122 is provided at the side end portions in the X direction and the Y direction of the bottom wall portion 12. The bent portion 122 is provided by bending the side end portions toward the + side in the Z direction.

[0091] In addition, 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 bottom wall 12 is fixed to the housing 10 by the bent portion 122 entering the groove.

[0092] In addition, 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 the present embodiment, a total of six half punched holes 123 are provided.

[0093] By providing the half punched hole 123 in this way, the strength of the bottom wall portion of the housing 10 can be improved.

[0094] 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 between the 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 side by side in the Y direction.

[0095] The first lens unit 31 is disposed on the most upstream side in the incident direction of the reflected light L2 (direction toward the positive side in the Y direction), and has a main body portion 31A and a supported portion 31B.

[0096] The main body 31A is a portion including a lens, and its side surface is configured to be curved, for example, with the central portion in the Z direction being convex. The side surface of the third wall 113 on the first lens unit 31 side has, for example, a shape along the side surface of the main body 31A, and is configured to allow the curved portion of the main body 31A to fit in.

[0097] The supported portion 31B is provided on the + side of the main body 31A in the Y direction and has a portion protruding further to both sides in the X direction than the main body 31A. In addition, the portion of the third wall 113 corresponding to the supported portion 31B is configured to be recessed from the top surface of the third wall 113 so that the supported portion 31B can be arranged.

[0098] In this way, the main body portion 31A is arranged along the side surface of the third wall 113 , and the supported portion 31B is supported by the third wall 113 , whereby the first lens unit 31 is fixed between the pair of third walls 113 .

[0099] The second lens unit 32 is disposed downstream of the first lens unit 31 in the incident direction and includes a lens through which light passing through the first lens unit 31 passes. The second lens unit 32 is movably supported by a drive bracket 61 described later.

[0100] The second lens unit 32 corresponds to the “movable portion” and the “first movable portion” of the present invention. The lenses included in the second lens unit 32 correspond to the “movable lens” and the “first movable lens” of the present invention.

[0101] The third lens unit 33 is disposed downstream of the second lens unit 32 in the incident direction and includes a lens (movable lens) through which light passing through the first lens unit 31 passes. The third lens unit 33 is movably supported by a drive bracket 61 described later.

[0102] The third lens unit 33 corresponds to the “movable portion” and the “second movable portion” of the present invention. The lenses included in the third lens unit 33 correspond to the “movable lens” and the “second movable lens” of the present invention.

[0103] The fourth lens unit 34 is arranged at the most downstream side in the incident direction, and has a main body 34A and a supported portion 34B. The main body 34A is configured to include a lens. The supported portion 34B protrudes from the side surface of the main body 34A in the X direction. The inner side surface of the second wall 112 constitutes a lens support portion 112C formed along the shape of the fourth lens unit 34. The fourth lens unit 34 is supported by the lens support portion 112C and is fixed to the second wall 112.

[0104] It should be noted that the lenses in the first to fourth lens units 31 to 34 may be assembled into the housing 10 when the lens driving device is manufactured, or may be assembled into the housing 10 when the camera module 1 is manufactured using the lens driving device.

[0105] like Figure 3 and Figure 5 As shown, the shaft portion 50 includes a first shaft 51 and a second shaft 52, which are made of, for example, stainless steel. The first shaft 51 and the second shaft 52 extend in the Y direction and are respectively provided in the regions of a pair of third walls 113 in the X direction. The first shaft 51 is provided in the region of the third wall 113 on the + side in the X direction. The second shaft 52 is provided in the region of the third wall 113 on the - side in the X direction. In the present embodiment, the first shaft 51 and the second shaft 52 are configured to have equal lengths to each other and are supported by the shaft support portion 113B on the third wall 113 and the shaft support portion 112A on the second wall 112.

[0106] In addition, if Figure 7As shown, the pair of first walls 111, the pair of third walls 113, and the pair of fourth walls 114 each have, for example, substantially the same shape, and are symmetrically arranged with respect to the optical axis O of the lens portion 30 on both sides in the X direction. The first axis 51 and the second axis 52 are supported by the pair of third walls 113, respectively, and are symmetrically arranged with respect to the optical axis O.

[0107] The lens driving unit 60 is respectively provided corresponding to the second lens unit 32 and the third lens unit 33, and moves the corresponding one of the second lens unit 32 and the third lens unit 33 independently under the control of the above-mentioned driving control unit 100. The lens driving unit 60 is respectively arranged in the area on the fourth wall 114 surrounded by the first wall 111, the second wall 112 and the third wall 113 on both sides in the X direction. That is, one lens driving unit 60 is respectively arranged on both sides of the optical axis O in the second lens unit 32 and the third lens unit 33 of the housing 10.

[0108] In the present embodiment, the lens driving unit 60 on the + side in the X direction drives the second lens unit 32 in the Y direction, and the lens driving unit 60 on the - side in the X direction drives the third lens unit 33 in the Y direction. That is, the lens driving unit 60 on the + side in the X direction corresponds to the "driving unit" and the "first driving unit" of the present invention, and the lens driving unit 60 on the - side in the X direction corresponds to the "driving unit" and the "second driving unit" of the present invention.

[0109] In the present embodiment, each lens driving unit 60 has a substantially identical structure, and therefore, in the following description, unless otherwise specified, only the lens driving unit 60 corresponding to the second lens unit 32 is described, and the description of the lens driving unit 60 corresponding to the third lens unit 33 is omitted. In addition, in the present embodiment, each lens driving unit 60 is symmetrically arranged in the X direction and the Y direction, and therefore, the relationship between the + side and the - side in the direction in the lens driving unit 60 corresponding to the third lens unit 33 is opposite to the relationship between the + side and the - side in the direction in the lens driving unit 60 corresponding to the second lens unit 32.

[0110] The lens driving section 60 includes a driving bracket 61 , a clamping section 62 , an ultrasonic motor 63 , a substrate section 64 , and a voltage step-up section 65 .

[0111] The driving bracket 61 supports one of the second lens unit 32 and the third lens unit 33 .

[0112] The drive bracket 61 is configured to be movable in the direction of the optical axis O (the Y direction) by guiding the movement in the direction of the optical axis O (the Y direction) by the shaft portion 50. When the drive bracket 61 moves in the direction of the optical axis O, the second lens unit 32 or the third lens unit 33 also moves in the Y direction. The details of the drive bracket 61 will be described later.

[0113] In addition, if Figure 8 As shown, the clamping portion 62 has a first clamping member 621 and a second clamping member 622 .

[0114] The first clamping member 621 is made of a flat metal member, for example, and is bonded to the surface on the + side in the X direction of the second portion 661B of the first supported portion 661 described later in the driving bracket 61. Two protrusions D1 and D2 are provided on the surface on the + side in the X direction of the second portion 661B.

[0115] The two protrusions D1 and D2 protrude from the surface of the second portion 661B and are arranged side by side in the Y direction. In this embodiment, the protrusion D1 is provided near the end of the second portion 661B on the - side in the Y direction, and the protrusion D2 is provided near the end of the second portion 661B on the + side in the Y direction.

[0116] The first interposing member 621 is arranged parallel to the direction of the optical axis (Y direction), and has engaging holes 621A and 621B that engage with the two protrusions D1 and D2 .

[0117] like Figure 8 and Fig. 9 As shown, the second intervening member 622 is made of, for example, a plate-shaped metal member, and is, for example, adhesively fixed to the first intervening member 621. The second intervening member 622 has a main body portion 622A and a contact portion 622B.

[0118] The main body 622A has a plane parallel to the optical axis direction (Y direction) and is bonded and fixed to the first interposing member 621. The main body 622A has engagement holes A1 and A2 that engage with the two protrusions D1 and D2 of the second portion 661B.

[0119] The engaging holes 621A and A1 are arranged near the ends of the - side in the Y direction of each clamping member 621 and 622, and are engaged with the protrusion D1. The engaging holes 621A and A1 are formed to a size that can be engaged with the protrusion D1 and the clamping member 62 can be rotated around the engaging holes 621A and A1 engaged with the protrusion D1.

[0120] The engaging holes 621B and A2 are arranged near the ends on the + side in the Y direction of each clamping member 621 and 622, and engage with the protrusion D2. The engaging holes 621B and A2 are formed to be sized to engage with the protrusion D2 and to have a spacing that allows the inner edges of the engaging holes 621B and A2 to move relative to the protrusion D2.

[0121] By forming the engagement holes 621A, 621B, A1, and A2 in this way, the clamping portion 62 can be rotated around the engagement holes 621A and A1 (protrusion D1) within the range of the engagement holes 621B and A2. As a result, the posture of the clamping portion 62 can be adjusted so that the contact portion 622B of the clamping portion 62 is parallel to the first axis 51.

[0122] The contact portion 622B is a portion that contacts the vibrator of the ultrasonic motor 63, and is formed by bending the ends of both sides of the main body 622A in the Z direction to the side opposite to the lens portion. Thus, the main body 622A connected with a pair of contact portions 622B is arranged to cover the ultrasonic motor 63 from the - side in the X direction, and the contact portion 622B is arranged to sandwich the ultrasonic motor 63 (resonance portion 631) (refer to Fig.10 ).

[0123] By configuring the clamping portion 62 in this way, a force acts on the contact portion 622B from the vibrator of the ultrasonic motor 63, thereby generating a thrust in the direction of the optical axis (the Y direction) in the clamping portion 62. As a result, a thrust that moves the drive bracket 61 in the direction of the optical axis (the Y direction) can be applied from the clamping portion 62 to the drive bracket 61.

[0124] In addition, a plurality of openings C1, C2, C3, and C4 are formed in the connection portion 622C between the main body portion 622A and the contact portion 622B. The plurality of openings C1, C2, C3, and C4 are arranged side by side along the Y direction on both sides of the connection portion in the Y direction, with four openings arranged on each side.

[0125] Among the four openings C1 , C2 , C3 , and C4 , the two openings C2 and C3 on the center side in the Y direction are configured to have a longer length in the Y direction and a longer length in the Z direction than the two openings C1 and C4 on the both end sides in the Y direction.

[0126] In addition, in the connection portion 622C, by forming four openings C1 , C2 , C3 , and C4 , five connection parts 622D arranged side by side at intervals in the direction of the optical axis are formed.

[0127] In the present embodiment, with respect to the width of each connection portion 622D in the Y direction (direction of the optical axis), the connection portion 622D that is located farther outward from the center in the Y direction has a wider width in the Y direction. Specifically, the connection portion 622D in the center in the Y direction has the narrowest width among the five connection portions 622D. The connection portions 622D at both ends in the Y direction have the widest width among the five connection portions 622D. The width of the connection portion 622D between the connection portion 622D located in the center and the connection portions 622D at both ends is wider than the width of the connection portion 622D in the center, and narrower than the width of the connection portions 622D at both ends.

[0128] For the connection part 622D (connection part 622C), the closer it is to the end, the weaker its strength is. Therefore, in this embodiment, the strength of the connection part 622C is adjusted by changing the size of the openings C1, C2, C3, and C4 in the connection part 622C and the width of the connection part 622D.

[0129] By configuring as described above, the pressing force applied by the vibrator 631B at each position of the contact portion 622B can be uniformed in the Y direction as a whole. As a result, when the stepless optical zoom function is activated in a device mounted on a portable terminal such as a smartphone, for example, even if the movable portion is moved within a relatively long moving range, the moving force of the clamping portion 62 can be stably generated.

[0130] like Fig.10 and Fig.11 As shown, the ultrasonic motor 63 is a driving source for generating a driving force for moving the driving bracket 61, and is fixedly disposed on the configuration portion 111A of the first wall 111 (see Figure 3 The ultrasonic motor 63 includes a resonance portion 631 , a piezoelectric element 632 , a first electrode 633 , and a second electrode 634 .

[0131] The ultrasonic motor 63 on the + side in the X direction corresponds to the “first ultrasonic motor” of the present invention, and the ultrasonic motor 63 on the − side in the X direction corresponds to the “second ultrasonic motor” of the present invention.

[0132] The resonance part 631 is formed of, for example, a conductive material, and resonates with the vibration of the piezoelectric element 632, converting the vibration motion into a linear motion of the drive bracket 61. Specifically, the resonance part 631 vibrates in a direction inclined relative to the direction of the optical axis (Y direction) based on the vibration of the piezoelectric element 632, and presses the clamping part 62, thereby generating a thrust for the drive bracket 61 to move along the direction of the optical axis through the clamping part 62. The resonance part 631 is configured to be sandwiched between the two contact parts 622B in the clamping part 62. Fig.12 As shown, the resonance portion 631 includes a body portion 631A, two vibrators 631B, a protruding portion 631C, and a current-carrying portion 631D.

[0133] The body portion 631A is, for example, a substantially rectangular portion sandwiched by the piezoelectric element 632. The two vibrators 631B extend in the Y direction from both ends of the body portion 631A in the Z direction. The two vibrators 631B have symmetrical shapes, and their free ends are in contact with the contact portion 622B of the sandwich portion 62.

[0134] The protrusion 631C extends from the center of the trunk portion 631A in the Z direction to the + side in the Y direction. The current-carrying portion 631D extends from the center of the trunk portion 631A in the Z direction to the side opposite to the protrusion 631C (the - side in the Y direction).

[0135] The piezoelectric element 632 is a plate-shaped vibration element formed of a ceramic material, for example, and generates vibrations when a high-frequency voltage is applied. Two piezoelectric elements 632 are provided, and each is arranged to sandwich the body portion 631A of the resonance portion 631 in the X direction.

[0136] The first electrode 633 includes a clamping portion 633A that clamps the resonance portion 631 and the piezoelectric element 632, and an electrode portion 633B to which a voltage is applied. The first electrode 633 applies a voltage to the piezoelectric element 632 via the clamping portion 633A that clamps the piezoelectric element 632. The second electrode 634 is electrically connected to the power supply portion 631D of the resonance portion 631. The first electrode 633 and the second electrode 634 are in contact with an input terminal of the substrate portion 64 described later on the inner side of the housing 10.

[0137] The two piezoelectric elements 632 are attached to the body 631A of the resonance part 631 and are electrically connected to each other by being sandwiched by the first electrode 633. For example, one of the power supply paths is connected to the first electrode 633 and the other is connected to the second electrode 634, thereby applying voltage to the piezoelectric element 632 to generate vibration.

[0138] The resonance part 631 has at least two resonance frequencies and deforms in different motions with respect to each resonance frequency. In other words, the overall shape of the resonance part 631 is set so that the resonance part 631 deforms in different motions with respect to the two resonance frequencies. The different motions refer to the motion of moving the drive bracket 61 to the + side in the Y direction through the clamping part 62 and the motion of moving the drive bracket 61 to the - side in the Y direction through the clamping part 62.

[0139] like Fig.13 As shown, the resonance portion 631 is configured in such a manner that one of a pair of contact portions 622B of the clamping portion 62 is opposite to the vibrator 631B. Therefore, when the two vibrators 631B are deformed, the front end of the vibrator 631B presses the contact portion 622B from the opposite side of each contact portion 622B in a direction inclined relative to the Y direction (see arrow A).

[0140] When each contact portion 622B is pressed by the front end of the vibrator 631B in the direction of arrow A, a reaction force is generated at each contact portion 622B to return to the vibrator 631B side. In other words, the interposing portion 62 generates a reaction force in the direction from the outside to the inside of the pair of contact portions 622B based on the contact between each vibrator 631B and the pair of contact portions 622B.

[0141] Due to the friction between the vibrator 631B and the contact portion 622B caused by the reaction force of the clamping portion 62 pressing against the vibrator 631B, a thrust in the Y direction is generated in the clamping portion 62. Accordingly, a thrust is applied to the driving bracket 61 bonded to the clamping portion 62 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 driving bracket 61 moves in the Y direction.

[0142] In addition, since the contact portion 622B is configured to extend in the Y direction, the contact portion 622B is pressed by the vibrator 631B to contact the vibrator 631B in a sliding manner and move in the Y direction. Therefore, the contact portion 622B is continuously pressed by the vibrator 631B, so that the driving bracket 61 bonded to the clamping portion 62 can be continuously moved in the Y direction. It should be noted that at a certain resonance frequency, the pressing direction of the vibrator 631B is the arrow A direction and the sliding direction of the contact portion 622B is the arrow B direction. On the other hand, at another resonance frequency, the pressing direction of the vibrator 631B is the arrow C direction and the sliding direction of the contact portion 622B is the arrow D direction.

[0143] Such driving operation is performed by each of the ultrasonic motors 63 provided on each of the first walls 111 on both sides in the X direction. That is, each ultrasonic motor 63 independently drives the second lens unit 32 and the third lens unit 33 along the direction of the optical axis.

[0144] like Figure 7 As shown, these movements are guided by the shaft portion 50. In addition, a restriction portion 114A is provided near the center portion of the fourth wall 114 in the Y direction.

[0145] In addition, the limiting portion 114A is provided at a position where it can contact the driving bracket 61. Therefore, when the driving bracket 61 on the + side in the X direction moves toward the + side in the Y direction, the driving bracket 61 contacts the limiting portion 114A. In addition, when the driving bracket 61 on the - side in the X direction moves toward the - side in the Y direction, the driving bracket 61 contacts the limiting portion 114A. Thus, the limiting portion 114A limits excessive movement of the driving bracket 61.

[0146] The substrate portion 64 is a circuit substrate (e.g., a flexible substrate) having wiring for inputting an input voltage from the outside (camera-mounted device) to the ultrasonic motor 63 and wiring for outputting a signal from the position detection portion 70 to the outside. The substrate portion 64 is configured to extend from the end portion on the - side in the Y direction of each of the pair of fourth walls 114 to the + side in the Y direction.

[0147] In addition, the driving bracket 61 and the ultrasonic motor 63 on the - side in the X direction are located closer to the + side in the Y direction than the driving bracket 61 and the ultrasonic motor 63 on the + side in the X direction, and therefore, the substrate portion 64 on the - side in the X direction is configured to be longer in the Y direction than the substrate portion 64 on the + side in the X direction. Terminals that contact the first electrode 633 and the second electrode 634 of the ultrasonic motor 63 and the position detection portion 70 are provided at a position of the substrate portion 64 corresponding to the driving bracket 61.

[0148] In addition, a gap is formed in the portion of the first wall 111 corresponding to the terminal arrangement portion 111C to a degree that the substrate portion 64 can pass through. The substrate portion 64 is configured so that the portion corresponding to the terminal arrangement portion 111C is arranged at the terminal arrangement portion 111C outside the housing 10 through the gap. With the help of this portion, an input voltage from the outside is input to the lens drive portion 60 (ultrasonic motor 63) via the substrate portion 64, or a signal of the position detection portion 70 is output to the outside (drive control portion 100, etc.).

[0149] In addition, a voltage step-up unit 65 is provided at the end portion on the - side in the Y direction of the substrate unit 64. The voltage step-up unit 65 includes an inductor that steps up the input voltage input to the lens driving unit 60 and supplies the voltage to the ultrasonic motor 63.

[0150] Inductors have large individual differences, so if a structure is adopted in which an inductor is provided outside the housing 10, the drive voltage of the lens drive unit 60 needs to be separately adjusted by the device equipped with the housing 10. In contrast, in this embodiment, since the inductor is provided inside the housing 10, it is not necessary to adjust the drive voltage of the lens drive unit 60 for each device equipped with the housing 10, thereby improving the ease of use for users.

[0151] The position detector 70 is for detecting the position of a magnet portion 663 of the drive bracket 61 , which will be described later, and is, for example, a Hall element, and is provided on the substrate 64 at a position facing the drive bracket 61 (magnet portion 663 ).

[0152] Next, the details of the drive bracket 61 will be described.

[0153] The driving bracket 61 is driven by the ultrasonic motor 63 to move in the direction of the optical axis, thereby moving the second lens unit 32 or the third lens unit 33 in the direction of the optical axis. The driving bracket 61 has a moving portion 66 and a supporting portion 67.

[0154] like Fig.14A and Fig. 14B As shown in FIG. 1 , the moving portion 66 is supported by the shaft portion 50 so as to be movable in the Y direction (direction of the optical axis), and is formed of a resin member. The moving portion 66 includes a first supported portion 661 and a second supported portion 662 .

[0155] The first supported portion 661 is a portion supported by the first shaft 51 on the + side in the X direction in the housing 10. The first supported portion 661 is configured in a box shape with the + side in the Z direction opened, and includes a first portion 661A, a second portion 661B, and a third portion 661C. It should be noted that the first supported portion 661 described above corresponds to the second lens unit 32, but the first supported portion corresponding to the third lens unit 33 is supported by the second shaft 52 (corresponding to the "first axis" of the present invention).

[0156] The first portion 661A is a portion constituting the bottom surface (the surface on the - side in the Z direction) of the first supported portion 661 and is configured in a rectangular shape having the sides in the X direction as short sides and the sides in the Y direction as long sides.

[0157] The second portion 661B is a portion constituting the side surfaces (surfaces on both sides in the X direction) corresponding to a pair of long side portions in the first portion 661A. The two protrusions D1 and D2 are provided on the outer side surface of the second portion 661B on the + side in the X direction. The second portion 661B on the - side in the X direction has a connection portion 661E connected to the support portion 67. The connection portion 661E extends from the end portion on the - side in the Z direction of the second portion 661B to the - side in the Z direction.

[0158] The third portion 661C is a portion constituting the side surfaces (surfaces on both sides in the Y direction) corresponding to a pair of short sides of the first portion 661A. An axis hole 661D for passing the first axis 51 is formed in each third portion 661C. Thus, the driving bracket 61 is supported by the first axis 51.

[0159] In addition, since the top surface portion (the portion on the + side in the Z direction) of the driving bracket 61 is open (see Figure 8 ), the first shaft 51 can only contact the wall constituting the shaft hole 661D in the pair of third parts 661C. Here, if the top surface portion of the driving bracket is not open, the first shaft can contact the entire top surface portion. However, since it contacts all parts of the top surface portion, the force applied to the first shaft from the top surface portion (+ side in the Z direction) becomes dispersed, which may affect the movement of the driving bracket.

[0160] In contrast, in this embodiment, the first shaft 51 can only contact two locations corresponding to the pair of third portions 661C, so force is applied only from these two locations. This can prevent the force applied to the first shaft 51 from the positive side in the Z direction from being dispersed in the Y direction as a whole, thereby preventing the influence on the movement of the driving bracket.

[0161] In addition, if Fig. 14BAs shown, a magnet portion 663 for detecting the position of the second lens unit 32 (movable portion) is provided on the surface of the - side in the Z direction of the first portion 661A of the first supported portion 661. The magnet portion 663 has two magnets 663A and 663B arranged side by side in the X direction. The magnet portion 663 is, for example, arranged in a recess formed on the surface of the - side in the Z direction of the first supported portion 661, and is opposite to the above-mentioned position detection portion 70.

[0162] In the magnet portion 663, one magnet 663A is arranged so that the N pole faces the position detection portion 70, and the other magnet 663B is arranged so that the S pole faces the position detection portion 70. That is, the two magnets 663A and 663B are magnetized in a direction along the direction (Z direction in the present embodiment) in which the magnet portion 663 faces the position detection portion 70 and in a direction in which different magnetic poles face the position detection portion 70.

[0163] The magnets 663A and 663B are arranged in a state of contacting each other. Therefore, different magnetic poles are arranged adjacent to each other on a surface 663C of the magnet portion 663 that faces the position detection portion 70 .

[0164] In addition, if Fig.15A , Fig. 15B and Fig. 15C As shown in FIG. 1 , the magnet portion 663 is arranged to be inclined with respect to the Y direction. That is, the boundary 663D between different magnetic poles in the magnet portion 663 extends to be inclined with respect to the optical axis.

[0165] By doing so, the ratio of the N poles and the ratio of the S poles in the facing portion between the position detection unit 70 and the magnet unit 663 can be changed according to the movement of the drive holder 61 in the Y direction.

[0166] For example, Fig.15A As shown, when the position of the drive bracket 61 is the most negative side in the Y direction, the position detection unit 70 is opposite to the positive side end of the magnet unit 663 in the Y direction. The position detection unit 70 is opposite to the portion of the end where the N-pole magnet 663A has a larger proportion.

[0167] As the drive bracket 61 moves toward the + side in the Y direction, the magnet portion 663 also moves together with the drive bracket 61, so the portion of the position detection portion 70 facing the magnet portion 663 changes. Since the magnet portion 663 is inclined, the proportion of the S pole in the portion facing the position detection portion 70 gradually increases.

[0168] like Fig. 15BAs shown, when the driving bracket 61 moves to a position where the position detection unit 70 is opposite to the central part of the driving bracket 61, the portion where the proportion of the S pole (magnet 663B) and the proportion of the N pole (magnet 663A) are approximately equal becomes the portion opposite to the position detection unit 70.

[0169] In addition, if Fig. 15C As shown, when the drive bracket 61 moves to a position where the position detection unit 70 faces the end portion on the - side of the drive bracket 61 in the Y direction, the portion with a larger proportion of the S pole (magnet 663B) becomes the portion facing the position detection unit 70.

[0170] Thus, the strength of the magnetic force detected by the position detection unit 70 can be made different depending on the position of the drive bracket 61 , so that the position of the drive bracket 61 in the Y direction can be detected with high accuracy by the position detection unit 70 .

[0171] like Fig.14A and Fig. 14B As shown, the second supported portion 662 is a portion supported by the second shaft 52 on the - side in the X direction in the housing 10. The second supported portion 662 has a fourth portion 662A and a fifth portion 662B. It should be noted that the second supported portion 662 described above corresponds to the second lens unit 32, but the second supported portion corresponding to the third lens unit 33 is supported by the first shaft 51 (corresponding to the "second shaft" of the present invention).

[0172] The fourth portion 662A is configured to extend in the Z direction and include a connection portion 662C connected to the support portion 67. The connection portion 662C extends from an end portion on the - side in the Z direction of the fourth portion 662A to the - side in the Z direction.

[0173] A pair of fifth portions 662B are provided at both ends of the fourth portion 662A in the Z direction, and extend from the both ends to the - side in the X direction. The second shaft 52 passes between the pair of fifth portions 662B, whereby the second supported portion 662 is supported by the second shaft 52 .

[0174] The support portion 67 is a portion that supports the second lens unit 32 (third lens unit 33) at a position closer to the optical axis than the shaft portion 50 (the center side in the X direction of the housing 10). The support portion 67 is composed of a metal component 671. The metal component 671 is insert-molded in each connection portion 661E, 662C of the moving portion 66.

[0175] The portion of the metal member 671 that is embedded in the moving portion 66 has a shape that follows the shape of the moving portion 66. Thus, the support portion 67 is integrally formed with the moving portion 66. The second lens unit 32 (third lens unit 33) is bonded and fixed to the metal member 671 in the support portion 67. It should be noted that any method may be used as long as the second lens unit 32 (third lens unit 33) can be fixed in the support portion 67.

[0176] The support portion 67 is configured such that the end portion on the + side in the X direction is connected to the connection portion 661E of the first supported portion 661, and the end portion on the - side in the X direction is connected to the connection portion 662C of the second supported portion 662. Thus, the support portion 67 is located closer to the - side in the Z direction than the first axis 51 and the second axis 52, and the second lens unit 32 (third lens unit 33) is located closer to the - side in the Z direction than the first axis 51 and the second axis 52.

[0177] In addition, the height range of the first shaft 51 and the second shaft 52 supporting the driving bracket 61 is a range including the height position of the center G of the second lens unit 32 (third lens unit 33). The height range of the first shaft 51 is a range from the height position of the end on the + side in the Z direction of the first shaft 51 to the height position of the end on the - side in the Z direction of the first shaft 51. The height range of the second shaft 52 is a range from the height position of the end on the + side in the Z direction of the second shaft 52 to the height position of the end on the - side in the Z direction of the second shaft 52. The first shaft 51 and the second shaft 52 have the same diameter and the same height position, and therefore, the height ranges of the first shaft 51 and the second shaft 52 are the same.

[0178] More specifically, the height positions of the axis centers of the first axis 51 and the second axis 52 are the same as the height position of the center G of the second lens unit 32 (third lens unit 33) (refer to Fig.14A dashed line).

[0179] In addition, the middle position P between the pair of contact portions 622B of the sandwiching portion 62 is at the same height position as the center G of the second lens unit 32 (third lens unit 33) (see Fig.14A dashed line).

[0180] In the present embodiment configured as described above, the second lens unit 32 (third lens unit 33 ) is supported by the driving bracket 61 .

[0181] However, in the case of using an ultrasonic motor as the driving portion, it may be considered to separately provide a movable portion that holds the movable lens, and a driving bracket that transmits the driving force of the ultrasonic motor to the movable portion.

[0182] In this structure, for example, two types of guide shafts are provided, namely, a guide shaft for a driving bracket and a guide shaft for a movable part. The driving bracket and the movable part are connected by a connecting component (a spring component for absorbing the position deviation between the driving bracket and the movable part, etc.), and the driving force is transmitted to the movable part by the driving bracket to move the movable part.

[0183] If such a structure is adopted, since the drive bracket and the movable part are moved separately, there is a possibility that a response delay of the driving force from the drive bracket to the movable part may occur. In addition, the movable part may be tilted due to the response delay.

[0184] In addition, since a magnet for detecting the position is provided in the driving bracket, the position of the movable part can be detected by detecting the position of the driving bracket. However, in such a structure for detecting the position of the movable part, the position detection part does not directly detect the position of the movable part, and therefore, the position of the movable part may not be managed with high accuracy.

[0185] In contrast, in the present embodiment, since the driving bracket 61 supports the second lens unit 32 (third lens unit 33), the movement of the driving bracket 61 itself is the movement of the second lens unit 32 (third lens unit 33). As a result, it is possible to suppress the response delay of the driving force to the second lens unit 32 (third lens unit 33), and it is possible to detect the position of the second lens unit 32 (third lens unit 33) with high accuracy, thereby enabling the position to be managed with high accuracy.

[0186] Furthermore, since the second lens unit 32 (third lens unit 33) is supported by the support portion 67 of the drive bracket 61, the tilt of the second lens unit 32 (third lens unit 33) relative to the drive bracket 61 due to the above-mentioned response delay can be suppressed.

[0187] In addition, the height range of the first axis 51 and the second axis 52 is a range of the height position including the center of the second lens unit 32 (third lens unit 33). Here, the drive bracket moves along the first axis and the second axis. Therefore, when misalignment or misalignment occurs in each component, the farther the component is from the height range of the first axis and the second axis, the greater the degree of inclination caused by the misalignment or misalignment. Therefore, the more the center of the movable lens deviates from this height range, the greater the impact on the light incident on the imaging element.

[0188] In contrast, in this embodiment, since the height range of the first axis 51 and the second axis 52 is a range including the height position of the center of the second lens unit 32 (third lens unit 33), the degree of inclination of the movable lens caused by misalignment or misalignment can be reduced. As a result, the degree of influence caused by misalignment or misalignment can be reduced in each component.

[0189] In addition, the middle position P between the pair of contact portions 622B in the second interposing member 622 is the same as the height position G of the center of the second lens unit 32 (third lens unit 33 ).

[0190] Thereby, the thrust generated by the second interposing member 622 by the ultrasonic motor 63 can be easily transmitted to the second lens unit 32 (third lens unit 33 ).

[0191] In addition, since the magnet portion 663 is provided in the portion of the driving bracket 61 constituting the bottom surface of the first supported portion 661, the magnet portion 663 does not protrude into the space between the first wall 111 and the driving bracket 61. As a result, the space between the first wall 111 and the driving bracket 61 can be effectively utilized, so that, for example, the driving force of the driving bracket 61 can be increased by increasing the size of the ultrasonic motor 63.

[0192] Furthermore, since the support portion 67 is formed of the metal member 671, the thickness of the support portion 67 can be reduced compared to a structure in which the support portion is formed of a resin member. Therefore, the length of the housing 10 (lens driving device) in the Z direction can be reduced.

[0193] Furthermore, since the support portion 67 is the metal member 671 , the strength of the portion serving as the support portion 67 can be increased.

[0194] In the above embodiment, the moving part 66 includes the first supported part 661 and the second supported part 662, but the present invention is not limited thereto, and the moving part 66 may be composed of only the first supported part. In this case, the shaft part may also include only the first shaft.

[0195] In addition, in the above-mentioned embodiment, a structure including two lens driving units 60 is adopted, but the present invention is not limited thereto, and any structure may be used as long as one or more lens driving units are provided.

[0196] Furthermore, in the above-described embodiment, the support portion 67 is formed of a metal member, but the present invention is not limited thereto, and the support portion 67 may be formed of a member other than a metal member.

[0197] In the above embodiment, the axis centers of the first axis 51 and the second axis 52 are located at the same height position as the center of the movable lens, but the present invention is not limited thereto, and the height position of the center of the movable lens may be within the height range of the axis.

[0198] Furthermore, in the above-described embodiment, the voltage-boosting unit 65 (inductor) is provided in the case 10 , but the present invention is not limited thereto, and the voltage-boosting unit may be provided outside the case.

[0199] In the above embodiment, the middle position between the pair of contact portions 622B of the second interposing member 622 is at the same height as the center of the movable lens, but the present invention is not limited thereto and may be slightly offset from this height.

[0200] In addition, in the above embodiment, one position detection unit 70 is provided in each drive bracket 61, but the present invention is not limited thereto. For example, a structure may be provided with a plurality of position detection units 70 arranged side by side in the direction of the optical axis (Y direction). By such an arrangement, the accuracy of the position detection of the drive bracket 61 can be further improved.

[0201] In addition, in the above embodiment, the side wall portion 11 and the bottom wall portion 12 of the housing 10 are formed by insert molding, but the present invention is not limited thereto, and the bottom wall portion may be bonded and fixed to the side wall portion 11 .

[0202] In addition, in the above embodiment, a structure having two movable lenses consisting of the second lens unit 32 and the third lens unit 33 is adopted, but the present invention is not limited to this, and a structure having three or more movable lenses or a structure having one movable lens may also be adopted.

[0203] In addition, in the above embodiment, a structure with four lens units is adopted, but the present invention is not limited thereto, and any number of lens units may be provided as long as the structure has at least one movable lens. In addition, in the case of a structure with one movable lens, there is also one lens driving unit.

[0204] Furthermore, in the above-described embodiment, the intervening portion 62 is formed by bending a plate-like metal member, but the present invention is not limited thereto, and the main body portion and the contact portion constituting the intervening portion may be formed of different members.

[0205] In the above embodiment, the driving bracket 61 and the intervening portion 62 are formed of different components, but the present invention is not limited thereto. For example, the driving bracket 61 and the intervening portion 62 may be formed integrally.

[0206] In addition, in the above-mentioned embodiment, the bottom wall portion has a structure with a bent portion and a half-punched hole, but the present invention is not limited to this, and a structure without a bent portion and a half-punched hole may be adopted.

[0207] In the above embodiment, the resonance portion 631 has a structure including two vibrators 631B, but the present invention is not limited thereto, and for example, a structure including one vibrator may be adopted.

[0208] In the above embodiment, the drive control unit, the reflection drive control unit and the camera control unit are separately provided, but the present invention is not limited thereto, and 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.

[0209] Furthermore, in the above-described embodiment, the restriction portion 114A is provided, but the present invention is not limited thereto, and the restriction portion may not be provided.

[0210] In addition, for example, in the above-mentioned embodiment, as an example of a camera-mounted device having a camera module 1, a smartphone as a portable terminal with a camera is cited for explanation, 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. The camera-mounted device includes information equipment and transportation equipment. Information equipment includes, for example, a portable phone with a camera, a laptop computer, a tablet terminal, a portable game console, a web camera, a drone, and a vehicle-mounted device with a camera (for example, a rear monitoring device, a driving recorder device). In addition, transportation equipment includes, for example, a car and a drone.

[0211] Fig.17A , Fig. 17B 1 is a diagram showing a car V as a camera mounting device on which a vehicle-mounted camera module VC (Vehicle Camera) is mounted. Fig.17A This is the front view of the car V. Fig. 17B FIG. 1 is a rear perspective view 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. Fig.17A and Fig. 17B As shown, the vehicle-mounted camera module VC is mounted on a windshield facing forward, or mounted on a tailgate facing backward. The vehicle-mounted camera module VC is used as a vehicle-mounted camera module for rear monitoring, driving recorder, collision avoidance control, automatic driving control, etc.

[0212] In addition, the above-mentioned embodiments are only examples of implementing 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 main features. For example, the shape, size, quantity and material of each part described in the above-mentioned embodiment are only examples, and can be implemented by appropriate changes.

[0213] The disclosure of the specification, drawings and abstract included in U.S. Provisional Application No. 63 / 059,244 filed on July 31, 2020 is incorporated herein by reference in its entirety.

[0214] Industrial Applicability

[0215] The lens driving device of the present invention is useful as a lens driving device, a camera module, and a camera mounting device that can suppress a response delay of a driving force applied to a movable portion and a tilt of the movable portion and can manage the position of the movable portion with high accuracy.

[0216] Description of Reference Numerals

[0217] 1 Camera module

[0218] 10 Housing

[0219] 11 Side wall

[0220] 12 Bottom wall

[0221] 20 Reflection drive unit

[0222] 21 Reflective Shell

[0223] 22 Reflector

[0224] 23 Reflection drive control unit

[0225] 30 Lens

[0226] 31 First lens unit

[0227] 31A Main body

[0228] 31B Supported part

[0229] 32 Second lens unit

[0230] 33 Third lens unit

[0231] 34 Fourth lens unit

[0232] 34A Main body

[0233] 34B Supported part

[0234] 40 Camera Department

[0235] 50 Shaft

[0236] 51 First Axis

[0237] 52 Second axis

[0238] 60 lens drive unit

[0239] 61 Drive bracket

[0240] 62 Clamping Department

[0241] 63 Ultrasonic Motor

[0242] 64 Substrate Department

[0243] 65 booster

[0244] 66 Mobile Department

[0245] 67 Support

[0246] 70 Position detection unit

[0247] 100 Drive control unit

[0248] 111 First Wall

[0249] 111A Configuration Department

[0250] 111B Engaged part

[0251] 111C Terminal configuration section

[0252] 112 Second Wall

[0253] 112A Shaft support

[0254] 112B Opening

[0255] 113 The Third Wall

[0256] 113A Bridge Connection

[0257] 113B Shaft support

[0258] 114 The Fourth Wall

[0259] 114A Restriction Department

[0260] 121 Positioning unit

[0261] 122 Bending part

[0262] 123 Half Punching

[0263] 200 Camera Control Unit

[0264] 621 First clamping member

[0265] 621A snap-in hole

[0266] 621B snap-in hole

[0267] 622 second clamping member

[0268] 622A Main body

[0269] 622B Contact

[0270] 622C Connection part

[0271] 622D Connection

[0272] 631 Resonance

[0273] 631A Trunk

[0274] 631B Vibrator

[0275] 631C Protrusion

[0276] 631D Power supply unit

[0277] 632 Piezoelectric element

[0278] 633 First Electrode

[0279] 633A Clamping part

[0280] 633B Electrode

[0281] 634 Second Electrode

[0282] 661 First supported portion

[0283] 661A Part 1

[0284] 661B Part 2

[0285] 661C Part 3

[0286] 661D Shaft hole

[0287] 661E Connection section

[0288] 662 second supported portion

[0289] 662A Part 4

[0290] 662B Part 5

[0291] 662C Connection part

[0292] 663 Magnet Department

[0293] 663A Magnet

[0294] 663B Magnet

[0295] 663C Opposite side

[0296] 663D Boundary

Claims

1. A driving device, characterized in that: have: A driving bracket, supporting the lens unit; A housing for accommodating the driving bracket; A shaft portion, supporting the driving bracket; as well as A driving unit is provided to move the driving bracket. The driving bracket has a moving portion supported by the shaft portion, A metal component is embedded in the driving bracket. The metal member has a shape along the moving portion.

2. The driving device according to claim 1, wherein: The shape is the shape of a portion of the metal component that is embedded in the drive bracket.

3. The driving device according to claim 1 or 2, wherein: The metal component is embedded in the moving portion.

4. A camera module, characterized in that: have: The driving device according to claim 1; a lens held by the lens unit; and The imaging unit captures an image of the object formed by the lens.

5. A camera-mounted device, which is information equipment or transportation equipment, wherein the camera-mounted device is characterized by comprising: The camera module of claim 4; and The imaging control unit processes the image information obtained by the camera module.

Images