Lens driving device, camera device, and electronic equipment

Abstract

A plurality of lens drive units (10L and 10R) are arranged side by side. In one lens drive unit (10L), magnets, namely a focusing magnet (55) and a swinging magnet (54), are both arranged on a stator (5) whose relative positional relationship with other lens drive units (10R) remains unchanged, while no magnet is arranged on the mover (4). In addition, since the mover (4) is not equipped with a magnet, even if the mover (4) moves, the magnetic field in the mover (4) of the other lens drive units (10R) does not change. Thus, the influence of magnetic interference between the adjacent lens drive units is reduced.

Description

Technical Field

[0001] The present invention relates to a lens driving device mounted on a camera device used in electronic equipment such as a smartphone, the camera device, and the electronic equipment. Background Art

[0002] Camera modules equipped with two or more lens drive devices, so-called dual-lens cameras, are becoming increasingly practical. Patent Document 1 discloses technology related to dual-lens cameras. The dual-lens optical camera module disclosed in Patent Document 1 is designed to simultaneously capture two images with different focal lengths, or to simultaneously capture still and moving images.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: US 2018 / 0048799A Summary of the Invention

[0006] Furthermore, dual-lens cameras employ a structure in which multiple lens drive units are arranged adjacent to each other. Consequently, the magnetic field of a magnet from another adjacent lens drive unit can sometimes interfere, compromising the stability of the camera's movement. Therefore, if each of the two lens drive units in a dual-lens camera has a shake correction function, the shake correction units of the two lens drive units must be integrated for operation. This integrated structure, driving a heavy object, can negatively impact movement speed and component durability.

[0007] The present invention has been conceived in view of such problems, and an object of the present invention is to provide a lens driving device, a camera device, and an electronic device that have a camera shake correction function and can reduce the influence of magnetic interference between a plurality of adjacent lens driving units.

[0008] In order to solve the above-mentioned problems, a lens driving device as a preferred embodiment of the present invention has a plurality of lens driving units, and one of the plurality of lens driving units has: a stator whose relative position relationship with the adjacent lens driving unit remains unchanged; and a mover that supports a lens body forming an optical system so that it can move along the optical axis direction of the lens body and a cross direction intersecting the optical axis direction, the stator has a focusing magnet and a swinging magnet, and the mover has: a focusing coil that moves the lens body along the optical axis direction according to the electromagnetic action between it and the focusing magnet; and a swinging coil that moves the lens body along the cross direction according to the electromagnetic action between it and the swinging magnet, one lens body is provided for one mover, and the mover of the one lens driving unit has a carrier supporting the lens body and an intermediate support body supporting the carrier, the focusing coil is arranged at a position in the intermediate support body that is one-to-one opposite to the focusing magnet, and the swinging coil is arranged at a position in the carrier that is one-to-one opposite to the swinging magnet.

[0009] In this embodiment, one lens body may be provided for one mover.

[0010] In addition, the focusing magnet is formed by pasting two focusing magnet sheets overlapping each other up and down, and the focusing magnet is magnetized in such a way that the magnetized surface faces inward and the magnetic poles of the upper focusing magnet sheet and the magnetic poles of the lower focusing magnet sheet become opposite magnetic poles, the upper half of the focusing coil is opposite to the upper focusing magnet sheet, and the lower half of the focusing coil is opposite to the lower focusing magnet sheet.

[0011] Furthermore, the optical system may include: a first elastic member that supports the carrier so as to be movable in the optical axis direction; and a second elastic member that supports the intermediate support so as to be movable in the intersecting direction.

[0012] In addition, the mover of the lens driving unit may also have a carrier supporting the lens body and an intermediate support body supporting the carrier, the magnet includes a focusing magnet and a swinging magnet, the focusing coil is arranged at a position opposite to the focusing magnet in the intermediate support body, and the swinging coil is arranged at a position opposite to the swinging magnet in the carrier.

[0013] Furthermore, the optical system may include: a first elastic member that supports the intermediate support so as to be movable in the optical axis direction; and a second elastic member that supports the carrier so as to be movable in the intersecting direction.

[0014] In addition, the mover of the lens driving unit may also have a carrier that supports the lens body, and the swing coil and the focusing coil are arranged at a position opposite to the magnet in the carrier, and the magnet is configured to surround the swing coil and the focusing coil.

[0015] In addition, the one lens driving unit can be the first lens driving unit, and the lens driving unit next to it can be the second lens driving unit, and the second lens driving unit can include: a second stator whose relative position relationship with the first lens driving unit remains unchanged; and a second mover that supports a second lens body that forms an optical system different from the lens body of the first lens driving unit and can move along the optical axis direction of the second lens body and a cross direction crossing the optical axis direction, the second stator has a second focusing magnet and a second swinging magnet, and the second mover is provided with: a second stator that moves the second lens body according to the electromagnetic action between the second stator and the second focusing magnet The lens drive unit further comprises a second lens body, a second lens body, a second lens body and a second lens driving unit. The lens drive unit further comprises ...

[0016] Furthermore, as another preferred embodiment of the present invention, a camera device includes the above-mentioned lens driving device.

[0017] Furthermore, as another preferred embodiment of the present invention, an electronic device includes the above-mentioned lens driving device.

[0018] According to the present invention, when a plurality of lens driving units are arranged adjacent to each other and each mover is moved individually, since the stator has a magnet, the influence of magnetic interference from adjacent lens driving units can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front view of a smartphone 9 equipped with the camera device 1 including the lens driving device 10 according to the first embodiment of the present invention.

[0020] Figure 2 yes Figure 1 10 is a perspective view of the lens driving units 10L and 10R of the lens driving device 10.

[0021] Figure 3 It will Figure 1 1 is a perspective view of the lens drive unit 10L exploded into the cover 2 and the unit main body 3.

[0022] Figure 4 It will Figure 1 FIG. 1 is a perspective view showing a further exploded view of the unit main body 3 of the lens drive unit 10L.

[0023] Figure 5 It shows Figure 1 FIG. 1 is a diagram showing the positional relationship between some components in the unit body 3 of the lens drive unit 10L.

[0024] Figure 6 is to change the viewing angle Figure 5 Picture.

[0025] Figure 7 It is a diagram showing the positional relationship between some components in the lens drive unit 10L of the lens drive device 10 according to the second embodiment of the present invention.

[0026] Figure 8 10 is a diagram showing the positional relationship between some components of the lens drive unit 10L of the lens drive device 10 according to the third embodiment of the present invention.

[0027] Figure 9 10 is a diagram showing the positional relationship between some components of the lens drive unit 10L of the lens drive device 10 according to the fourth embodiment of the present invention.

[0028] Figure 10 10 is a diagram showing the positional relationship between some components of the lens drive unit 10L of the lens drive device 10 according to the fifth embodiment of the present invention.

[0029] Figure 11 It is a perspective view of the unit main body 3 of the lens driving unit 10L of the lens driving device 10 according to the sixth embodiment of the present invention.

[0030] Figure 12 yes Figure 11 10L is an exploded perspective view of the unit body 3 of the lens drive unit 10L.

[0031] Figure 13 It shows Figure 11 FIG. 1 is a diagram showing the positional relationship between some components in the unit body 3 of the lens drive unit 10L.

[0032] Figure 14 10 is a diagram showing the positional relationship between some components of the lens drive unit 10L of the lens drive device 10 according to the seventh embodiment of the present invention.

[0033] Figure 15It is an exploded perspective view of the unit main body 3 of the lens driving unit 10L of the lens driving device 10 according to the eighth embodiment of the present invention. DETAILED DESCRIPTION

[0034] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

[0035] <First embodiment>

[0036] Figure 1 This is a front view of a smartphone 9 equipped with a camera device 1 including a lens driving device 10 according to a first embodiment of the present invention. The camera device 1 drives two lens driving units 10L and 10R of the lens driving device 10 to photograph a subject.

[0037] The two lens drive units 10L and 10R of the lens drive device 10 are positioned so that their respective lenses 99 face the subject and are inserted into an opening on the back of the housing 90 of the smartphone 9. The side of the lens 99 with respect to the optical axis of the subject is referred to as the front side or the upper side, and the side opposite to the subject, where the imaging element is located, is referred to as the rear side or the lower side.

[0038] Figure 2 yes Figure 1 1 is a perspective view of the lens drive units 10L and 10R of the lens drive device 10. The lens drive units 10L and 10R are arranged side by side.

[0039] Figure 3 and Figure 4 It is an assembly diagram of the lens drive unit 10L. Figure 5 and Figure 6 10L is a diagram showing the positional relationship between some components of the lens drive unit 10L. The lens drive unit 10L includes a cover 2 and a unit body 3.

[0040] The cover 2 is a member that covers the unit body 3. The cover 2 is box-shaped with one side open. A through-hole 21 is defined in the center of the cover 2. In this first embodiment, the cover 2 is formed from a magnetic material and also functions as a yoke. Two inner yokes 23L and 23R extend toward the rear from opposing edges of the cover 2, sandwiching the through-hole 21.

[0041] The stator 5 supports the mover 4. The relative position of the stator 5 and adjacent lens drive units, such as the lens drive unit 10R, remains unchanged. The stator 5 includes a cover 2, a base 51 of the unit body 3, a mounting plate 53, a swing magnet 54, and a focus magnet 55.

[0042] The base 51 is in the shape of a thin rectangular plate. A through hole 52 is formed in the center of the base 51. The open box-shaped end of the cover 2 is mounted on the outer edge of the base 51. The cover 2 and the base 51 form a storage space.

[0043] Two mounting plates 53 are fixed to the upper surface of the base 51. The mounting plates 53 are provided on the inner sides of two end sides that face each other across the through hole 52. The mounting plates 53 are members formed by bending a rectangular metal plate into an L-shape.

[0044] Two swing magnets 54 and two focus magnets 55 are fixed to the inner sides of the two mounting plates 53. The swing magnets 54 are in the shape of a trapezoidal column having substantially the same height as the mounting plates 53.

[0045] Two swing magnets 54 are installed at positions corresponding to adjacent corners of the rectangular base 51. The surface of the swing magnet 54 corresponding to one of the trapezoidal hypotenuses is fixed to the mounting plate 53, while the surface corresponding to the lower base of the trapezoid forms a magnetized surface facing inward from the base 51. The magnetized surface of the swing magnet 54 is magnetized to a single pole. Furthermore, the magnetized surfaces of the two swing magnets 54 are arranged orthogonally.

[0046] The focus magnet 55 is formed by laminating rectangular parallelepiped focus magnet pieces 55 a and 55 a having approximately half the height of the mounting plate 53 in an overlapping manner.

[0047] The focus magnets 55 are arranged at two opposing sides of the rectangular base 51 and fixed to the mounting plate 53. The focus magnets 55 are magnetized so that the magnetized surface faces the inside of the base 51 and the magnetic poles of the upper focus magnet piece 55a and the magnetic poles of the lower focus magnet piece 55a are opposite to each other.

[0048] exist Figure 4 In the embodiment, the mover 4 is used to enable the lens 99 ( Figure 1 ) is a member that supports the lens body 99 so as to move along the optical axis direction and the cross direction intersecting the optical axis direction. Here, the optical axis direction is appropriately referred to as the Z direction. In addition, regarding the cross direction, a direction (typically Figure 4 The direction in which the two focusing magnets 55 are opposed to each other is appropriately referred to as the X direction, and the direction perpendicular to both the Z direction and the X direction is appropriately referred to as the Y direction.

[0049] The mover 4 has a carrier 6 and an intermediate support 7. The carrier 6 is in the shape of an octagonal prism. There is a through hole 62 in the center of the carrier 6. The through hole 62 is used to embed the lens body 99 ( Figure 1 ). After the lens drive unit 10L is completed, the lens body 99 is mounted on the carrier 6, thereby forming an optical system.

[0050] Two notches 63 are formed on each of the two end surfaces of the carrier 6, facing each other in the X direction with the through-hole 62 interposed therebetween, and are recessed toward the through-hole 62. Two focus coils 65 are fixed to each of the end surfaces of the carrier 6 on the side of the notches 63. When the cover 2 covers the mover 4, the inner yoke 23L of the cover 2 is accommodated in one of the two notches 63, and the inner yoke 23R is accommodated in the other.

[0051] The focus coil 65 is wound about the X direction and is arranged to face the magnetized surface of the focus magnet 55. The upper half of the focus coil 65 faces the upper focus magnet piece 55a, and the lower half of the focus coil 65 faces the lower focus magnet piece 55a.

[0052] When viewed from the Z direction, the intermediate support body 7 presents an octagonal frame corresponding to the octagonal carrier 6, and is arranged between the carrier 6 and the swinging magnet 54 and the focusing magnet 55. The intermediate support body 7 has an annular portion arranged at the upper end, and six side plates facing the six end faces of the carrier 6 except for the face with the focusing coil 65. The side plates extend downward from the annular portion. Among the six side plates of the intermediate support body 7, a swinging coil 74 is fixed to the outer side of each of the two side plates facing the swinging magnet 54. The two swinging coils 74 are respectively wound with the middle direction of the X direction and the Y direction as the winding axis, and are respectively arranged so as to face the magnetized surface of the swinging magnet 54. In this case, it is preferable to arrange the center of the swinging coil 74 and the center of the magnetized surface of the swinging magnet 54 at a relatively close position.

[0053] The intermediate support body 7 is provided with two openings 163 corresponding to the focus coils 65. The two openings 163 are opposed to each other in the X direction.

[0054] The eight front plates 78 are provided at the corners of the octagonal annular portion of the intermediate support body 7. At the lower end of every other corner of the octagonal intermediate support body 7, a rear plate 79 is provided.

[0055] The carrier 6 of the unit body 3 is housed in a space surrounded by the side plates and the opening 163 in the intermediate support body 7. In this space, the carrier 6 is supported by the intermediate support body 7 via the front leaf spring 76 and the rear leaf spring 77 as first elastic members.

[0056] The front leaf spring 76 and the rear leaf spring 77 each have an inner portion, an outer portion, and a plurality of arms connecting the inner and outer portions. The inner portion of the front leaf spring 76 is fixed to the upper end of the carrier 6. The outer portion of the front leaf spring 76 is fixed to the front plate 78 of the intermediate support body 7. The inner portion of the rear leaf spring 77 is fixed to the lower end of the carrier 6. The outer portion of the rear leaf spring 77 is fixed to the rear plate 79 of the intermediate support body 7. The front leaf spring 76 and the rear leaf spring 77 may also be provided separately. Thus, the carrier 6 is supported so as to be movable relative to the intermediate support body 7 along the optical axis.

[0057] The intermediate support body 7 is housed in a space surrounded by the focus magnet 55 and the swing magnet 54 in the base 51. The intermediate support body 7 is supported by the stator 5 in this space via wires 58 as second elastic members. In the first embodiment, eight wires 58 are used.

[0058] The upper ends of the wires 58 are fixed to the front plate 78 of the intermediate support body 7. The lower ends of the wires 58 are fixed to the base 51. The intermediate support body 7 can swing relative to the base 51 in the cross direction.

[0059] The wire 58 can serve as a path for current flowing to the swing coil 74 and the focus coil 65 , and at least one of the front leaf spring 76 and the rear leaf spring 77 can serve as a path for current flowing to the focus coil 65 .

[0060] The focus magnets 55 are respectively accommodated in the two openings 163 in the intermediate support body 7 .

[0061] When a predetermined current flows through the focus coil 65, the electromagnetic interaction between the focus magnet 55 and the focus coil 65 (Fleming's left-hand rule) generates a thrust in the Z direction, causing the carrier 6 and the lens 99 to move along the optical axis (Z direction). When a predetermined current flows through the swing coil 74, the electromagnetic interaction between the swing magnet 54 and the four swing coils 74 generates a thrust in a cross direction (the direction normal to the magnetized surface of each swing magnet 54), causing the intermediate support 7 and the carrier 6 to move in the cross direction. Thus, the lens 99 is supported relative to the stator 5 so that it can move along the optical axis and in a cross direction intersecting the optical axis.

[0062] The structure of the lens driving unit 10R is the same as that of the lens driving unit 10L, and the same reference numerals as those of the lens driving unit 10L are used for description. The structures of the lens driving unit 10L as the first lens driving unit and the adjacent second lens driving unit, namely the lens driving unit 10R, are outlined as follows.

[0063] The lens drive unit 10R includes a second stator 5 whose relative positional relationship with the lens drive unit 10L remains unchanged; and a second mover 4 that supports a second lens body 99, which forms an optical system different from the lens body 99 of the lens drive unit 10L, and is movable along the optical axis of the second lens body 99 and in a cross-axis direction intersecting the optical axis. The second stator 5 includes a second focusing magnet 55 and a second swinging magnet 54 as second magnets. The second mover 4 is provided with a second focusing coil 65 that moves the second lens body 99 along the optical axis by electromagnetic interaction with the second focusing magnet 55 as second magnet. Furthermore, the second mover 4 is provided with a second swinging coil 74 that moves the second lens body 99 along the cross-axis by electromagnetic interaction with the second swinging magnet 54 as second magnet. In the first embodiment, the second mover 4 includes a second carrier 6 and a second intermediate support 7. A second focusing coil 65 is provided on the second carrier 6 , and a second swinging coil 74 is provided on the second intermediate support 7 .

[0064] When a predetermined current flows through the second focusing coil 65 of the lens drive unit 10R, the second carrier 6 of the lens drive unit 10R moves in the optical axis direction (Z direction) together with the second lens body 99 within the second carrier 6 due to the electromagnetic interaction between the second focusing coil 65 and the second focusing magnet 55. When a predetermined current flows through the second swinging coil 74 of the lens drive unit 10R, the second intermediate support body 7 moves in the cross directions (X direction and Y direction) together with the second carrier 6 within the second intermediate support body 7 due to the electromagnetic interaction between the second swinging coil 74 and the second swinging magnet 54.

[0065] The above is the details of this embodiment. According to this embodiment, the following effects can be obtained.

[0066] In this first embodiment, in the lens drive unit 10L, magnets, namely the focusing magnet 55 and the swing magnet 54, are both provided on the stator 5 whose relative positional relationship with the lens drive unit 10R remains unchanged, and no magnet is provided on the mover 4. Therefore, there is no attraction / repulsion force of the magnet of the lens drive unit 10R on the mover 4. In addition, because the mover 4 is not equipped with a magnet, the magnetic field in the second mover 4 of the lens drive unit 10R does not change even if the mover 4 moves. Therefore, when a plurality of lens drive units are arranged adjacent to each other and each mover is moved individually, the influence of magnetic interference from the adjacent lens drive units can be reduced.

[0067] Furthermore, in the first embodiment, the oscillation magnet 54 and oscillation coil 74 are arranged at two adjacent corners of the base 51. However, they may be arranged at all four corners so that two diagonally opposed pairs generate driving forces in the same direction. Furthermore, the focus magnet 55 and focus coil 65 may be arranged at all four sides.

[0068] Furthermore, the shapes and positions of the focus magnet 55 and the swing magnet 54 do not need to be as described above. For example, the focus magnet 55 may be a trapezoidal column (triangular prism) and positioned at each corner of the base 51, while the swing magnet 54 may be a rectangular parallelepiped and positioned at each side of the base 51.

[0069] Alternatively, the focus magnet 55 may be formed of a single piece and magnetized so that the upper and lower magnetic poles are opposite to each other.

[0070] <Second embodiment>

[0071] Next, a second embodiment of the present invention will be described. Figure 7 1 is a diagram showing the positional relationship among the carrier 6, the focus magnet 55, the focus coil 65, the swing magnet 54A, and the swing coil 74 of the lens drive unit 10L of the lens drive device 10 according to the second embodiment of the present invention. Figure 7 In the drawings, the same elements as those in the first embodiment are denoted by the same reference numerals.

[0072] The lens drive unit 10L of the second embodiment replaces the swing magnets 54 ( Figure 5 and Figure 6 The swing magnet 54A is formed by bonding two swing magnet pieces 54Aa, each having a shape similar to the swing magnet 54 of the first embodiment, in a longitudinally bisected manner, to form a shape identical to the swing magnet 54 as a whole. The magnetized surfaces of the two swing magnet pieces 54Aa facing the swing coil 74 are magnetized to have different magnetic poles.

[0073] When a predetermined current flows through the swing coil 74, electromagnetic interaction with the swing magnet 54A generates a thrust in a crosswise direction (a direction parallel to the magnetized surface of each swing magnet 54A). The direction of this thrust is orthogonal to the direction of the thrust generated by the combination of the swing magnet 54 and the swing coil 74 in the first embodiment.

[0074] The lens driving device 10 of the second embodiment differs from the lens driving device 10 of the first embodiment only in the above-mentioned point. The lens driving device 10 of the second embodiment can obtain the same effects as the lens driving device 10 of the first embodiment.

[0075] <Third embodiment>

[0076] Next, a third embodiment of the present invention will be described. Figure 8 1 is a diagram showing the positional relationship among the carrier 6, the focus magnet 55B, the focus coil 65B, the swing magnet 54, and the swing coil 74B of the lens drive unit 10L of the lens drive device 10 according to the third embodiment of the present invention. Figure 8 Components identical to those in the first and second embodiments are denoted by the same reference numerals. The lens drive unit 10L of the second embodiment replaces the focus coil 65, focus magnet 55, and swing coil 74 of the lens drive unit 10L of the first embodiment with a focus coil 65B, focus magnet 55B, and swing coil 74B.

[0077] Focusing coil 65B is wound with the Z direction as its winding axis, surrounding the outer circumference of carrier 6 and securing it. Focusing magnet 55B has the same rectangular shape as focusing magnet 55 and is positioned in the same position. However, the magnetized surface facing focusing coil 65B is magnetized with a single pole. Furthermore, both magnetized surfaces of focusing magnet 55B have the same pole, for example, so that the north pole faces the focusing coil 65B. This exerts a thrust on focusing coil 65B in the direction of the optical axis (Z direction).

[0078] The swing coil 74B is wound with the Z direction as its winding axis and is positioned at least one location above or below the swing magnet 54. In the third embodiment, the swing coil 74B is fixed to an annular portion at the upper end of the intermediate support 7 (not shown). This generates thrust in the swing coil 74B in a crosswise direction (the direction normal to the magnetized surface of each swing magnet 54).

[0079] In addition, in the case of this embodiment, the swing magnet 54 is preferably arranged to be separated from the focus coil 65B.

[0080] Alternatively, the oscillating magnet 54 and oscillating coil 74B may be arranged at the corners of the rectangular base 51 (not shown). In this embodiment, the oscillating magnet 54 also faces the focus coil 65B, with its magnetized surface having the same polarity as the focus magnet 55B, for example, magnetized to the north pole, and positioned as close to the focus coil 65B as possible. This allows the oscillating magnet 54 to also function as a focus magnet that applies a Z-direction thrust to the focus coil 65B, thereby increasing the Z-direction thrust.

[0081] The lens driving device 10 of the third embodiment differs from the lens driving device 10 of the first embodiment only in the above-mentioned point. The lens driving device 10 of the third embodiment can obtain the same effects as the lens driving device 10 of the first embodiment.

[0082] <Fourth embodiment>

[0083] Next, a fourth embodiment of the present invention will be described. Figure 9 1 is a diagram showing the positional relationship among the carrier 6, the focus magnet 55B, the focus coil 65B, the swing magnet 54A, and the swing coil 74 of the lens drive unit 10L of the lens drive device 10 according to the fourth embodiment of the present invention. Figure 9 In the drawings, the same elements as those in the first to third embodiments are denoted by the same reference numerals.

[0084] The lens drive unit 10L of this embodiment replaces the focus coil 65 and focus magnet 55 of the lens drive unit 10L of the second embodiment with the focus coil 65B and focus magnet 55B of the lens drive unit 10L of the third embodiment. Therefore, this fourth embodiment also achieves the same effects as the first embodiment.

[0085] <Fifth embodiment>

[0086] Next, a fifth embodiment of the present invention will be described. Figure 10 1 is a diagram showing the positional relationship among the carrier 6, the focus magnet 55B, the swing magnet 54, the focus coil 65B, and the swing coil 74 of the lens drive unit 10L of the lens drive device 10 according to the fifth embodiment of the present invention. Figure 10 In the embodiment, the same elements as those in the first to fourth embodiments are denoted by the same reference numerals.

[0087] The lens drive unit 10L of the fifth embodiment replaces the focus coil 65 and focus magnet 55 of the lens drive unit 10L of the first embodiment with the focus coil 65B and focus magnet 55B of the lens drive unit 10L of the third embodiment. Therefore, the fifth embodiment also achieves the same effects as the first embodiment.

[0088] <Sixth embodiment>

[0089] Next, a sixth embodiment of the present invention will be described. Figure 11 It is a perspective view of a unit main body 3E of a lens driving unit 10L of a lens driving device 10 according to a sixth embodiment of the present invention. Figure 12 It is an exploded perspective view of the unit body 3E. Figure 1310L is a diagram showing the positional relationship between some components in the lens drive unit 10L. Figure 11 、 Figure 12 and Figure 13 In the embodiment, the same elements as those in the first to fifth embodiments are denoted by the same reference numerals.

[0090] In the lens drive unit 10L of the lens drive device 10 according to the first to fifth embodiments described above, the unit body 3 has a structure in which the focus coils 65 and 65B are provided on the carrier 6, and the swing coils 74 and 74B are provided on the intermediate support 7. In contrast, in the lens drive unit 10L of the lens drive device 10 according to the sixth embodiment, the unit body 3E has a structure in which the swing coil 74E is provided on the carrier 6, and the focus coil 65E is provided on the intermediate support 7.

[0091] like Figure 12 As shown, the unit body 3E includes a stator 5E with the cover 2 (not shown) removed and a mover 4E mounted thereon. The stator 5E includes the cover 2 (not shown), a base 51E, and a frame 59E. The mover 4E includes a carrier 6E and an intermediate support 7E. The relative positional relationship between the stator 5E and the adjacent lens drive unit 10R remains unchanged.

[0092] The base 51E has a square bottom plate and eight pillars 151E. The eight pillars 151E are formed by two pillars rising from the inner side of each of the four edges forming the periphery of the bottom plate. A through hole 52E is provided in the center of the base 51E.

[0093] The frame 59E is a thin plate with a square ring shape and four corners cut off. The lower surface of the frame 59E is fixed to the upper end surfaces of the eight columns 151E of the base 51E.

[0094] Focus magnet 55E is composed of rectangular parallelepiped focus magnet pieces 55Ea, 55Ea, stacked and bonded together. Focus magnet 55E is placed in the gap between two adjacent pillars 151E at two predetermined diagonally opposite corners of base 51E. Its magnetization direction is the same as that of focus magnet 55. Focus magnet 55E can also be placed at two further diagonally opposite corners.

[0095] The swing magnets 54E are formed in a rectangular parallelepiped shape and are housed in the gaps between two adjacent columns 151E on two adjacent sides of the base 51E. Their magnetization directions are the same as those of the swing magnets 54. The swing magnets 54E may also be placed on the remaining two sides.

[0096] The carrier 6E is an octagonal columnar member with a through hole 62E provided at the center. The upper edge of the carrier 6E has four flanges 161E extending to both sides in the X direction and both sides in the Y direction.

[0097] The intermediate support body 7E includes an octagonal bottom plate with a through hole 62E in the center and four side walls 171E. The four side walls 171E rise from four of the eight sides forming the bottom plate's periphery that correspond to the corners of the base 51E.

[0098] The carrier 6E is housed in a space within the intermediate support body 7E, surrounded by four side walls 171E. Eight wires 58, serving as second elastic members, connect the flange 161E to the bottom plate of the intermediate support body 7E. Within this space, the carrier 6E is supported by the intermediate support body 7E via the wires 58, allowing it to swing in the intersecting direction.

[0099] The intermediate support body 7E is retracted into the space enclosed by the base 51E and the frame 59E. Within this space, the intermediate support body 7E is supported by the base 51E (which serves as the stator 5E) and the frame 59E via four front leaf springs 76 and four rear leaf springs 77, which serve as first elastic members. Each front leaf spring 76 connects the upper surface of the frame 59E to the upper surface of the side wall 171E of the intermediate support body 7E. Each rear leaf spring 77 connects the upper surface of the bottom plate of the base 51E to the lower surface of the bottom plate of the intermediate support body 7E.

[0100] The focusing coil 65 is the same as the focusing coil 65 of the first embodiment and is disposed on the side wall 171E of the intermediate support body 7E at a position opposite the focusing magnet 55E. The swinging coil 74 is the same as the swinging coil 74 of the first embodiment and is disposed on the side wall 171E of the intermediate support body 7E at a position opposite the swinging magnet 54E. The carrier 6E moves in the cross direction due to the electromagnetic interaction between the swinging magnet 54E and the swinging coil 74. The intermediate support body 7E moves in the optical axis direction due to the electromagnetic interaction between the focusing magnet 55E and the focusing coil 65. Therefore, in this sixth embodiment, the lens body 99 is also supported relative to the stator 5E so as to be movable in the optical axis direction and in a cross direction intersecting the optical axis direction.

[0101] The structure of the lens drive unit 10R is the same as that of the lens drive unit 10L. That is, in the lens drive unit 10L, the magnets, namely the focusing magnet 55E and the swing magnet 54E, are both provided on the stator 5E whose relative positional relationship with the lens drive unit 10R remains unchanged, while no magnets are provided on the mover 4E. Therefore, the attraction / repulsion force generated by the magnets of the lens drive unit 10R does not act on the mover 4E. In addition, since the mover 4E is not equipped with a magnet, the magnetic field in the second mover 4E of the lens drive unit 10R will not change even if the mover 4E moves. Therefore, when a plurality of lens drive units are arranged adjacent to each other and each mover is moved individually, the influence of magnetic interference from the adjacent lens drive units can be reduced.

[0102] <Seventh embodiment>

[0103] Next, a seventh embodiment of the present invention will be described. Figure 14 1 and 2 are diagrams showing the positional relationship among the focus magnet 55E, the focus coil 65 , the swing magnet 54F, and the swing coil 74 of the lens drive unit 10L of the lens drive device 10 according to the seventh embodiment of the present invention.

[0104] The lens drive unit 10L of this embodiment replaces the swing magnet 54E in the base 51E of the lens drive unit 10L of the sixth embodiment with a swing magnet 54F. The swing magnet 54F is formed by bonding two swing magnet pieces 54Fa in the same shape as the swing magnet 54E, which are longitudinally split. The overall shape is the same as that of the swing magnet 54E.

[0105] The two swing magnet pieces 54Fa are magnetized to have opposite magnetic poles on their magnetized surfaces facing the swing coil 74. The thrust generated by the swing magnet 54F and the swing coil 74 is directed in a cross direction (parallel to the magnetized surfaces of each swing magnet 54F).

[0106] The lens driving device 10 of the seventh embodiment differs from the lens driving device 10 of the sixth embodiment only in the above-mentioned point. The lens driving device 10 of the seventh embodiment can obtain the same effects as the lens driving device 10 of the sixth embodiment.

[0107] <Eighth embodiment>

[0108] Next, an eighth embodiment of the present invention will be described. Figure 15 It is an exploded perspective view of a unit main body 3G of a lens driving unit 10L of a lens driving device 10 according to an eighth embodiment of the present invention.

[0109] like Figure 15 As shown, the mover 4G of the eighth embodiment does not have intermediate supports 7 to 7E as in the first to seventh embodiments, but a focusing coil 65G and a swing coil 74G are mounted on a carrier 6G, and the carrier 6G moves directly along the optical axis and the cross direction.

[0110] The unit body 3G has a mover 4G and a stator 5G excluding a cover 2G. The mover 4G has a carrier 6G for supporting the lens body 99, and a focusing coil 65G and a swinging coil 74G are fixed to the carrier 6G. The focusing coil 65G is wound with the optical axis as the winding axis direction and is fixed around the carrier 6G. The swinging coil 74G is perpendicular to the optical axis and is wound with the radial direction centered on the optical axis as the winding axis direction, and is arranged and fixed at 90-degree intervals around the carrier 6G. In this eighth embodiment, the swinging coil 74G is attached to the surrounding of the focusing coil 65G.

[0111] The stator 5G has a box-shaped cover 2G, a square plate-shaped base 51G, and a square ring-shaped washer 81G, and is mounted with a focus swing dual-purpose magnet 56G. The cover 2G is mounted on the outer edge of the base 51G, and a storage space is formed inside. The washer 81G is fixed to the lower surface of the top plate of the box-shaped cover 2G. The focus swing dual-purpose magnet 56G is roughly trapezoidal columnar and is mounted on the inner surface of the side wall of the cover 2G. At this time, the inner surface of the focus swing dual-purpose magnet 56G is opposite to the focus coil 65G and the swing coil 74G. The inner surface of the focus swing dual-purpose magnet 56G is magnetized to a single pole and is arranged so that all the inner surfaces have the same pole.

[0112] The carrier 6G is supported on the stator 5G by a front leaf spring 76G and a rear leaf spring 77G. Each of the front leaf spring 76G and the rear leaf spring 77G has an inner portion, an outer portion, and multiple arms connecting the inner and outer portions. The inner portion of the front leaf spring 76G is fixed to the upper portion of the carrier 6G, while the outer portion is fixed to the lower surface of the washer 81G. The inner portion of the rear leaf spring 77G is fixed to the lower portion of the carrier 6G, while the outer portion is fixed to the upper surface of the bottom plate of the base 51G. The arms are elastically deformable both along the optical axis and in cross-axis directions.

[0113] When a predetermined current flows through the focus coil 65G, electromagnetic interaction between the focus and swing magnet 56G and the focus coil 65G generates thrust in the Z direction, causing the carrier 6G and the lens body 99 to move along the optical axis (Z direction). When a predetermined current flows through the swing coil 74G, electromagnetic interaction between the focus and swing magnet 56G and the swing coil 74G generates thrust in the cross direction (the direction normal to the magnetized surface of each focus and swing magnet 56G), causing the carrier 6G and the lens body 99 to move along the cross direction. Thus, the lens body 99 is supported relative to the stator 5G so as to be movable along the optical axis and in a cross direction intersecting the optical axis.

[0114] As described above, the focus and swing magnet 56G plays the role of moving the lens body 99 in the optical axis direction by electromagnetic action with the focus coil 65G, and plays the role of moving the lens body 99 in the cross direction by electromagnetic action with the swing coil 74G.

[0115] In the eighth embodiment, the movable member 4G is also not provided with a magnet. However, the eighth embodiment can also provide the same effects as those of the first to seventh embodiments.

[0116] Alternatively, the swing coil 74G may be disposed on the carrier 61G, and the focus coil 65G may be disposed so as to surround the swing coil 74G.

[0117] In addition, in the first to eighth embodiments, the lens drive unit 10R is described as having the same structure as the lens drive unit 10L in each embodiment, but is not limited to this. The lens drive unit 10R may be in any form. Since the movers 4 to 4G of the lens drive unit 10L are not equipped with magnets, it is difficult to be affected by magnetic interference from the lens drive unit 10R. In addition, as long as the lens drive unit 10R has a structure in which the second movers 4 to 4G are not equipped with magnets, as in the lens drive unit 10L in the first to eighth embodiments, the lens drive unit 10L is unlikely to be affected by magnetic interference on the lens drive unit 10R.

[0118] Furthermore, the lens driving device 10 according to the first to eighth embodiments may be mounted on electronic devices other than the camera device 1 of the smartphone 9 .

[0119] Description of labels

[0120] 1…camera device; 2…cover; 3…unit body; 4…motor; 5…stator; 6…carrier; 7…intermediate support body; 9…smartphone; 10…lens drive device; 10L, 10R…lens drive unit; 51…base; 54…magnet for swinging; 55…magnet for focusing; 58…metal wire; 65…coil for focusing; 74…coil for swinging; 76…front leaf spring; 77…rear leaf spring; 90…housing; 99…lens body.

Claims

1. A lens driving device, characterized in that: Equipped with multiple lens driving units, One of the plurality of lens driving units comprises: a stator having a constant relative positional relationship with an adjacent lens driving unit; and a mover that supports a lens body forming an optical system so as to be movable along the optical axis direction of the lens body and a direction intersecting the optical axis direction, The stator has a focusing magnet and a swing magnet. The mover includes: a focusing coil that moves the lens body along the optical axis direction according to the electromagnetic action between the focusing coil and the focusing magnet; and a swinging coil that moves the lens body along the intersecting direction according to the electromagnetic action between the swinging coil and the swinging magnet. One of the lens bodies is provided for each of the movers. The mover of the lens driving unit includes a carrier supporting the lens body and an intermediate support body supporting the carrier. The focusing coil is arranged in a position in the intermediate support body facing the focusing magnet in a one-to-one relationship. The swing coils are provided in the carrier at positions facing the swing magnets one by one. The lens driving device further includes: a first elastic member that supports the intermediate support so as to be movable along the optical axis direction; and a second elastic member supporting the carrier so as to be movable in the cross direction; The intermediate support body is supported on the stator via the first elastic member. The carrier is supported by the intermediate support body via the second elastic member.

2. The lens driving device according to claim 1, wherein: The focusing magnet is formed by pasting two focusing magnet pieces together in an overlapping manner, and the focusing magnet is magnetized so that the magnetized surface faces inward and the magnetic poles of the upper focusing magnet piece and the magnetic poles of the lower focusing magnet piece become opposite magnetic poles. An upper half of the focus coil faces the upper focus magnet piece, and a lower half of the focus coil faces the lower focus magnet piece.

3. The lens driving device according to claim 1 or 2, wherein: The one lens driving unit is made a first lens driving unit, and the adjacent lens driving unit is made a second lens driving unit, The second lens driving unit comprises: a second stator having a constant relative positional relationship with the first lens driving unit; and a second mover supporting a second lens body forming an optical system different from the lens body of the first lens driving unit so as to be movable along the optical axis direction of the second lens body and in a direction intersecting the optical axis direction. The second stator includes a second focusing magnet and a second swing magnet. The second mover is provided with: a second focusing coil for moving the second lens body along the optical axis direction according to the electromagnetic action between the second focusing magnet and the second moving magnet; and a second swinging coil for moving the second lens body along the cross direction according to the electromagnetic action between the second swinging magnet and the second moving magnet. A second lens body is provided for each second mover. The second mover of the second lens driving unit includes a second carrier supporting the second lens body and a second intermediate support body supporting the second carrier. The second focusing coil is provided at a position in the second intermediate support body so as to be opposed to the second focusing magnet in a one-to-one relationship. The second swing coil is provided at a position in the second carrier so as to be opposed to the second swing magnet in a one-to-one relationship. The lens driving device further includes: a third elastic member supporting the second intermediate support so as to be movable along the optical axis direction; and a fourth elastic member supporting the second carrier so as to be movable in the cross direction; The second intermediate support body is supported on the second stator via the third elastic member. The second carrier is supported by the intermediate support body via the fourth elastic member. 4 . A camera device comprising the lens driving device according to claim 1 . 5 . An electronic device comprising the lens driving device according to claim 1 .

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