Lens driving device, camera device and electronic equipment

Abstract

The present invention provides a lens driving device, a photographic device and an electronic device that can keep a mover at a certain position in a static state and does not require a large driving force when driven, including: a stator and a mover supported to move freely relative to the stator in a direction perpendicular to the optical axis of the lens, either the stator or the mover has a plurality of driving magnets arranged in a circumferential direction centered on the optical axis, and either the stator or the mover has a plurality of positioning magnets facing the plurality of driving magnets at a certain angle, and the driving magnets and the positioning magnets corresponding to the driving magnets form a plurality of magnet groups, and in each magnet group, the magnetic pole faces of the driving magnets and the positioning magnets relative to each other are magnetized to the same magnetic poles. The beneficial effects of the present invention are as follows: there is a rebound force between the mover and the stator, and the mover can be kept in a position where the rebound forces of the plurality of magnet groups are balanced in a static state, and the rebound force will not become a resistance force when driven, so a large driving force is not required.

Description

Technical Field

[0001] The present invention relates to a lens driving device used for a camera mounted on electronic devices such as mobile phones and smart phones, and a camera and electronic device using the lens driving device. Background Art

[0002] Some previous lens driving devices have a driving magnet on a mover that moves along the XY direction, and a magnetic attraction element (magnetic attraction element) on a stator that supports the mover. In this case, the mover has a lens support body, and moves the lens support body along the Z-axis direction as the optical axis direction. In addition, with respect to the XY direction, in a stationary state, the mover is held at a certain position in the XY direction by the attraction of the driving magnet by the magnetic attraction element, as shown in Patent Gazette No. 2017-090902 (Patent Document 1).

[0003] The conventional lens driving device is a structure in which the driving magnet is attracted by the magnetic element, so that the mover moving in the XY direction is held at a certain position in the XY direction in a stationary state. Therefore, there is a problem that if a driving force is applied to move it in the XY direction, the attraction turns into a resistance force, thus requiring a larger driving force. Summary of the invention

[0004] In view of the defects in the prior art, the object of the present invention is to provide a lens driving device, a camera device and an electronic device which can keep a mover at a certain position in a static state and do not require a large driving force when driven.

[0005] In order to solve the above technical problems, the present invention provides a lens driving device, comprising: a stator; a mover, the mover moves relative to the stator along a direction perpendicular to the lens optical axis; a magnet group, the magnet group including a driving magnet and a positioning magnet facing the driving magnet, and the pole surfaces of the driving magnet and the positioning magnet relative to each other are magnetized to the same pole; wherein the stator is provided with a plurality of the driving magnets arranged along a circumferential direction centered on the lens optical axis, and the mover is provided with a plurality of the positioning magnets forming a plurality of the magnet groups with the plurality of the driving magnets; or the mover is provided with a plurality of the driving magnets arranged along a circumferential direction centered on the lens optical axis, and the stator is provided with a plurality of the positioning magnets forming a plurality of the magnet groups with the plurality of the driving magnets.

[0006] Preferably, the plurality of magnet groups are arranged at equal intervals along a circumferential direction centered on the optical axis of the lens.

[0007] Preferably, the positioning magnetic pole surface of the positioning magnet is directly opposite to the driving magnetic pole surface of the driving magnet.

[0008] Preferably, the positioning pole surface of the positioning magnet intersects with the driving pole surface of the driving magnet; the intersection line of the positioning pole surface of the positioning magnet and the driving pole surface of the driving magnet is located on the extended surface of the positioning pole surface of the positioning magnet and the driving pole surface of the driving magnet.

[0009] Preferably, the angle between the positioning magnetic pole surface of the positioning magnet and the driving magnetic pole surface of the driving magnet is a right angle.

[0010] Preferably, the driving magnetic pole surface of the driving magnet faces a direction perpendicular to the optical axis of the lens.

[0011] Preferably, the driving magnet has a first driving magnetic pole surface and a second driving magnetic pole surface, and the first driving magnetic pole surface and the second driving magnetic pole surface having a magnetic pole opposite to the first driving magnetic pole surface are arranged along the optical axis direction of the lens; the first positioning magnetic pole surface on one side of the positioning magnet is opposite to the first driving magnetic pole surface, and the second positioning magnetic pole surface on the other side of the positioning magnet opposite to the first positioning magnetic pole surface on the one side is opposite to the second driving magnetic pole surface; or there are two positioning magnets, the positioning magnetic pole surface of one positioning magnet is opposite to the first driving magnetic pole surface, and the positioning magnetic pole surface of the other positioning magnet is opposite to the second driving magnetic pole surface.

[0012] Preferably, in the direction of the lens optical axis, the center positions of the first driving magnetic pole surface and the second driving magnetic pole surface of the driving magnet are offset from the center positions of the two positioning magnetic pole surfaces of the positioning magnet.

[0013] A photographic device comprises a lens driving device, a lens mounted on a mover on the lens driving device and through which light emitted from a subject passes, and an image sensor receiving the light passing through the lens; the lens driving device is a lens driving device.

[0014] An electronic device includes a camera device, wherein the camera device is a camera device.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] One side of the stator or the mover has a driving magnet, and the other side of the stator or the mover has a positioning magnet corresponding to the driving magnet and forming a magnet group. In the magnet group, the magnetic pole surface of the positioning magnet is opposite to the magnetic pole surface of the driving magnet at a certain angle, and the two magnetic pole surfaces are magnetized to the same magnetic pole. Through such a structure, the following effects are achieved: there is a rebound force between the mover and the stator, and the mover can be kept in a position where the rebound forces of multiple magnet groups are balanced in a static state. On the other hand, the rebound force will not become a resistance force during driving, so a large driving force is not required.

[0017] Instruction Manual

[0018] Other features, objects and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0019] Figure 1 FIG. 4 is a cross-sectional view of a lens driving device according to a first embodiment of the present invention.

[0020] Figure 2 for Figure 1 A-A line cross-section.

[0021] Figure 3 This is a schematic diagram of an example of the configuration of a magnet group used in the first embodiment of the present invention.

[0022] Figure 4 It is an exploded perspective view of the lens driving device involved in the second embodiment of the present invention.

[0023] Figure 5 This is an exploded perspective view of the mover used in the second embodiment of the present invention.

[0024] FIG. 6( a ) is a perspective view of the driving magnet, the driving coil and the positioning magnet in the second embodiment of the present invention.

[0025] FIG6(b) is a schematic diagram showing the relationship among the driving magnet, the driving coil and the positioning magnet.

[0026] FIG. 7( a ) is a perspective view of the driving magnet, the driving coil and the positioning magnet in the second embodiment.

[0027] FIG. 7( b ) is a schematic diagram showing the relationship between the driving magnet, the driving coil and the positioning magnet in the second embodiment. DETAILED DESCRIPTION

[0028] The present invention is described in detail below using specific examples. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, without departing from the concept of the present invention, several changes and improvements can also be made, which all belong to the protection scope of the present invention.

[0029] One form of the present invention is a lens driving device, comprising a stator and a mover supported to move freely relative to the stator in a direction perpendicular to the optical axis of the lens, wherein either the stator or the mover comprises a plurality of driving magnets arranged in a circumferential direction centered on the optical axis, and the other of the stator and the mover comprises a plurality of positioning magnets facing the plurality of driving magnets at a certain angle, and the driving magnets and the positioning magnets corresponding to the driving magnets constitute a plurality of magnet groups, and in each magnet group, the magnetic pole faces of the driving magnet and the positioning magnet relative to each other are magnetized to the same magnetic poles.

[0030] like Figure 1 As shown, the present invention provides a lens driving device, a camera device and an electronic device, Figure 1 and Figure 2 embodies a lens driving device 10 according to an embodiment of the present invention.

[0031] The lens driving device 10 includes a stator 12 and a mover 14. The mover 14 is supported by a support member 16 so as to be movable relative to the stator 12 in the XY directions.

[0032] Furthermore, for ease of understanding, in this specification, in the XYZ rectangular coordinate system, the optical axis direction of the lens of the lens driving device 10 is the Z direction, and directions perpendicular to the optical axis and perpendicular to each other are the X direction and the Y direction.

[0033] The stator 12 includes a shielding box 18 and a base 20. The shielding box 18 is made of a non-magnetic material such as stainless steel, and has a square shape when viewed from the Z direction, and is provided with a circular first hole 22, through which light passes. The base 20, like the shielding box 18, has a square shape when viewed from the Z direction, and is provided with a circular second hole 24, through which light passes. The shielding box 18 is embedded in the outer edge of the base 20, and the periphery of the mover 14 is covered by the shielding box 18 and the base 20.

[0034] The support member 16 is, for example, a steel wire that is elastically deformable, one end of which is fixed to the inner four corners of the base 20, and the other end of which is fixed to the magnet fixing body 26 of the mover 14 described later. Therefore, the mover 14 is suspended by the support member 16 and can move relative to the stator 12 in the XY direction.

[0035] The mover 14 includes a magnet support body 26 and a lens support body 28. The lens support body 28 is arranged on the inner side of the magnet support body 26. A rectangular driving magnet 30 is fixed in the center of the four sides of the magnet support body 26. The lens support body 28 is an annular body, and the inner side of the lens support body 28 is formed into a circle with the Z axis as the center, and a lens is fixed to the inner side of the lens support body 28. On the other hand, the outer side of the lens support body 28 is formed into, for example, an octagonal shape, and a Z-direction driving coil 32 is fixed around the lens support body 28. The Z-direction driving coil 32 is wound around the Z-axis direction by, for example, a copper core wire, and is formed into an octagonal ring. The driving magnet 30 fixed on the magnet support body 26 and the Z-direction driving coil 32 fixed on the lens support body 28 are opposite to each other in the XY direction through a gap.

[0036] The magnet fixing body 26 and the lens supporting body 28 are connected to each other via an upper spring member 34 and a lower spring member 36 so as to be movable in the Z direction.

[0037] in addition, Figure 2 The lower middle spring member 36 is omitted.

[0038] As mentioned above, the lens support 28 supports the lens. The lens driving device 10 with the lens supported by the lens support 28 is mounted on the photographic device. In the photographic device, the light emitted from the subject and input through the lens is detected by the light receiving sensor. The movement amount of the lens used to focus on the subject is calculated by the controller equipped on the photographic device. The controller controls the current corresponding to the lens movement amount to flow to the Z-direction driving coil 32. If the Z-direction driving coil 32 is energized, the magnetic flux emitted by the driving magnet 30 will cause the Z-direction driving coil 32 to generate a Lorentz force (electromagnetic force) that moves upward or downward. If the Lorentz force is generated in the Z-direction driving coil 32, the lens, the coil 32 and the lens support 28 move together against the upper elastic component 34 and the lower elastic component 36, thereby focusing.

[0039] An XY direction driving coil 38 is fixed to the four sides of the shielding box 18 of the stator 12. The XY direction driving coil 38 has two straight sections extending in the X direction or the Y direction, and the two straight sections are connected by a semicircular connecting portion. The straight section of the XY driving coil 38 is opposite to the Z direction end of the driving magnet 30. The magnetic flux with the Z direction component of the driving magnet 30 acts on the XY driving coil 38. Therefore, if the XY driving coil 38 is energized, a Lorentz force in the Y direction or the X direction acts on the XY driving coil 38, and the mover 14 moves in the XY direction due to the reaction force of the Lorentz force.

[0040] That is, in a photographic device, if hand shake occurs in the photographic device, the direction and amount of the deviation are detected by a sensor (not shown), and the coil 38 for driving in the XY direction is energized. The actuator 14 moves in the XY direction against the elastic force of the supporting component 16 due to the reaction force of the Lorentz force, thereby compensating for the hand shake.

[0041] In this first embodiment, the positioning magnet 40 is fixed to the shield case 18 at the middle side of the XY driving coil 38 and faces the driving magnet 30 . The driving magnet 30 and the positioning magnet 40 form four magnet groups 42 in the XY directions.

[0042] Each magnet group 42 is as follows Figure 3 As shown, the magnets are arranged at intervals of 90 degrees along the circumferential direction with the Z axis as the center. In addition, in each magnet group 42, the magnetic pole faces 30a, 40a of the driving magnet 30 and the positioning magnet 40 are magnetized to the same magnetic pole. In this embodiment, the N poles of the driving magnet 30 and the positioning magnet 40 are opposite.

[0043] The driving magnet 30 and the positioning magnet 40 have the same magnetic poles facing each other, so a rebound force acts on the mover 14 in the direction away from the stator 12. Therefore, if the XY direction driving coil 38 is stopped from being energized, a rebound force will act on the mover 14 from four directions, and the rebound forces in the X direction and the Y direction will be balanced, and the mover 14 will stop at the center of the stator 12.

[0044] When the XY direction driving coil 38 is energized again, when the mover 14 stops, the mover 14 is balanced by the rebound force as described above. Therefore, the resistance for driving the mover 14 in the XY direction is small, and a large driving force is not required.

[0045] That is, when the X-direction driving coil 38 is energized, a reaction force of the Lorentz force moving in the X-direction acts on the mover 14, but a rebound force acts on the mover 14 from both sides in the X-direction, and this rebound force does not become a resistance to the movement of the mover 14 in the X-direction.

[0046] Figure 4 FIG. 7 shows a lens driving device 10 according to a second embodiment of the present invention.

[0047] The supporting structures of the mover 14 and the lens support 28 and the structure of the magnet group 42 are different from those in the first embodiment.

[0048] Next, the differences from the first embodiment will be mainly described.

[0049] Furthermore, the same parts as those in the first embodiment are marked with the same symbols on the drawings and the description is omitted.

[0050] Movers 14 Figure 5As shown in FIG. 1 , a lens support body 28 and a frame body 44 surrounding the lens support body 28 are provided. The lens support body 28 and the frame body 44 have a substantially square shape when viewed from above.

[0051] The frame 44 includes a first plate 46 , a second plate 48 , and a cover 50 . The cover 50 is fixed to the second plate 48 .

[0052] The frame 44 includes an XY direction support mechanism 52 , and the lens support 28 is supported by the XY direction support mechanism 52 so as to be movable in the X direction and the Y direction.

[0053] The XY direction support mechanism 52 includes a first support mechanism 54 and a second support mechanism 56. The first support mechanism 54 includes a first support portion 58 and a first guide portion 60. The first support portion 58 is formed to protrude from the downward surface of the first plate 46. The first guide portion 60 is formed to be recessed in the upward surface of the second plate 48. The first support portion 58 is embedded in the first guide portion 60. The first support portion 58 and the first guide portion 60 extend in the X direction, and the first plate 46 is free to move only in the X direction relative to the second plate 48.

[0054] The second support mechanism 56 includes a second support portion 62 and a second guide portion (not shown). The second support portion 62 is formed to protrude from the upward surface of the first plate 46. The second guide portion is formed to be recessed in the downward surface of the lens support body 28. The second support portion 62 is embedded in the second guide portion. The second support portion 62 and the second guide portion extend in the Y direction, and the lens support body 28 is free to move only in the Y direction relative to the first plate 46. Therefore, the lens support body 28 is free to move in the X direction and the Y direction relative to the second plate 48.

[0055] In addition, the mover 14 is Figure 4 As shown, the lens support 28 is supported by the Z-direction support mechanism 64 to be freely movable in the Z direction relative to the stator 12. The Z-direction support mechanism 64 includes third support parts 66, 66 provided on the base 20 of the stator 12 and third guide parts 68, 68 provided on the second plate 48 of the mover 14. The third support parts 66, 66 protrude in the +Z direction from the bottom of the base 20 in a rod shape and are embedded in the inner side of the third guide parts 68, 68, supporting the mover 14 to be freely movable in the Z direction. Therefore, the lens support body 28 is supported to be freely movable in the X direction, the Y direction, and the Z direction relative to the stator 12.

[0056] X-direction driving magnets 30X1 and 30X2 are fixed to the outer surfaces in the ±X direction of the lens support body 28. On the other hand, X-direction driving coils 38X1 and 38X2 are fixed to the inner surfaces in the ±X direction of the base 20 as shown in FIG6 , facing the X-direction driving magnets 30X1 and 30X2. The X-direction driving coils 38X1 and 38X2 are electrically connected in series.

[0057] A Y-direction driving magnet 30Y is fixed to the -Y direction outer side surface of the lens support 28. On the other hand, a Y-direction driving coil 38Y is fixed to the -Y direction inner side surface of the base 20 so as to face the Y-direction driving magnet 30Y.

[0058] As in the first embodiment, the magnetic flux of the Z direction component from the X direction driving magnets 30X1, 30X2 and the Y direction driving magnet 30Y acts on the X direction driving coils 38X1, 38X2 and the Y direction driving coil 38Y. Therefore, when the X direction driving coils 38X1, 38X2 and the Y direction driving coil 38Y are energized, the X direction or Y direction Lorentz force acts on the X direction driving coils 38X1, 38X2 and the Y direction driving coil 38Y, respectively, and the mover 14 moves in the XY direction due to the reaction of the Lorentz force.

[0059] In addition, a Z-direction driving magnet 30Z is fixed to the outer surface in the +Y direction of the second plate 48. The Z-direction driving magnet 30Z is composed of two magnet pieces 70a and 70b extending in the X direction. The magnet pieces 70a and 70b are arranged separately in the Z direction, and the magnet piece 70a has a first magnetic pole surface 72a, and the magnet piece 70b has a second magnetic pole surface 72b. The magnetic poles of the first magnetic pole surface 72a and the second magnetic pole surface 72b are different. On the other hand, a Z-direction driving coil 32 is fixed to the inner surface in the +Y direction of the base 20, opposite to the Z-direction driving magnet 30Z. A Y-direction magnetic flux acts on the Z-direction driving coil 32 from the Z-direction driving magnet 30Z. Therefore, if the Z-direction driving coil 32 is energized, a Z-direction Lorentz force acts on the Z-direction driving coil 32, and the mover 14 moves in the Z direction due to the reaction of the Lorentz force.

[0060] X-direction positioning magnets 40X1 and 40X2 are fixed to the base 20 in the middle of the X-direction driving coils 38X1 and 38X2. The X-direction positioning magnets 40X1 and 40X2 face the X-direction driving magnets 30X1 and 30X2 and together with the X-direction driving magnets 30X1 and 30X2 constitute the X-direction magnet groups 42X1 and 42X2.

[0061] A first Y-direction positioning magnet 40Y1 is fixed to the base 20 at the center of the Y-direction driving coil 38Y. The first Y-direction positioning magnet 40Y1 faces the Y-direction driving magnet 30Y and constitutes a first Y-direction magnet group 42Y1 together with the Y-direction driving magnet 30Y.

[0062] A second Y-direction positioning magnet 40Y2 is fixed to the base 20 in the middle of the Z-direction driving coil 32. The second Y-direction positioning magnet 40Y2 faces the Z-direction driving magnet 30Z and constitutes a second Y-direction magnet group 42Y2 together with the Z-direction driving magnet 30Z.

[0063] As shown in FIG6 , in the X-direction magnet groups 42X1 and 42X2, the magnetic pole faces 30X1a and 30X2a of the X-direction driving magnets 30X1 and 30X2 and the magnetic pole faces 40X1a and 40X2a of the X-direction positioning magnets 40X1 and 40X2 are magnetized to the same magnetic pole, for example, the N pole. Therefore, a rebound force acts on the mover 14 from both sides in the X direction.

[0064] In addition, the magnetic pole surface 30Ya of the Y-direction driving magnet 30Y and the first positioning magnet 40Y1 in the Y-direction are magnetized to the same magnetic pole, for example, the N pole. In addition, the first magnetic pole surface 72a and the second magnetic pole surface 72b of the Z-direction driving magnet 30Z are respectively opposite to the magnetic pole surfaces 40Y2a and 40Y2b of the second positioning magnet 40Y2 in the Y-direction at an intersection angle of 90 degrees, and are magnetized to the same magnetic pole. That is, in the second embodiment, the second positioning magnet 40Y2 in the Y-direction is magnetized along the Z-direction, and the magnetic pole surfaces 40Y2a and 40Y2b are formed on the ±Z side. At this time, the first magnetic pole surface 72a and the magnetic pole surface 40Y2a on the +Z side of the second positioning magnet 40Y2 in the Y-direction are set to intersect on their extension, and the second magnetic pole surface 72b and the magnetic pole surface 40Y2b on the -Z side of the second positioning magnet 40Y2 in the Y-direction are set to intersect on their extension. The first magnetic pole surface 72a of the magnet piece 70a on one side of the Z-direction driving magnet 30Z and the magnetic pole surface 40Y2a on one side of the second positioning magnet 40Y2 in the Y-direction are magnetized to, for example, N poles, and the second magnetic pole surface 72b of the magnet piece 70b on the other side of the Z-direction driving magnet 30Z and the magnetic pole surface 40Y2b on the other side of the second positioning magnet 40Y2 in the Y-direction are magnetized to, for example, S poles. Therefore, a rebound force acts on the mover 14 from both sides in the Y-direction.

[0065] Therefore, if the power supply to the X-direction driving coils 38X1, 38X2, the Y-direction driving coils 38Y, and the Z-direction driving coils 32 is stopped, rebound forces from four directions will act on the mover 14. Therefore, the rebound forces in the X-direction and Y-direction are balanced, and the mover 14 stops at the center of the stator 12. In addition, when the mover 14 stops, the mover 14 is balanced due to the rebound force, so the resistance for driving the mover 14 in the XY directions is small, and a large driving force is not required.

[0066] Here, FIG. 6(b) shows that the center position of the second Y-direction positioning magnet 40Y2 in the Z direction deviates from the center position of the Z-direction driving coil 32 in the Z direction. In this case, as if the power supply to the Z-direction driving coil 32 is stopped, the Z-direction driving magnet 30Z will stop at a position in the Z direction where the rebound force in the Z direction is balanced. That is, regardless of the position of the Z-direction driving coil 32, the Z-direction driving magnet 30Z will stop at a position where the center position of the first magnetic pole surface 72a and the second magnetic pole surface 72b of the Z-direction driving magnet 30Z and the center position of the two magnetic pole surfaces 40Y2a and 40Y2b of the Y-direction second positioning magnet 40Y2 are consistent. That is, the Y-direction second positioning magnet 40Y2 also positions the Z-direction driving magnet 30Z (motor 14) in the Z direction. At this time, positioning is performed by balancing the rebound force, so as in the XY direction, there is less resistance for driving the mover 14 in the Z direction, and a large driving force is not required.

[0067] In addition, if the Z-direction driving coil 32 is stopped from being energized, the member on the Z-direction driving magnet 30Z side will abut against the member on the Y-direction second positioning magnet 40Y2 side on the way to the above-mentioned balance point and stop moving, then a force (pre-pressure) pushing on the member on the Y-direction second positioning magnet 40Y2 side will be applied to the member on the Z-direction driving magnet 30Z side. Such a structure is a structure in which, in the state of the above-mentioned movement stopping, the center positions of the first magnetic pole face 72a and the second magnetic pole face 72b of the Z-direction driving magnet 30Z and the center positions of the two magnetic pole faces 40Y2a and 40Y2b of the Y-direction second positioning magnet 40Y2 deviate in the optical axis direction. In such a structure, pre-pressure is applied, so it is strong against external impact.

[0068] FIG. 7 shows a modified example of the second embodiment.

[0069] In this modified example, two Y-direction second positioning magnets 40Y2 are provided. The two Y-direction second positioning magnets 40Y2 are arranged along the Z-direction, sandwiching the Z-direction driving coil 32. In addition, the two Y-direction second positioning magnets 40Y2 are magnetized along the same -Z direction. The magnetic pole surface 40Y2a of the Y-direction second positioning magnet 40Y2 on one side is opposite to the first magnetic pole surface 72a of the Z-direction driving magnet 30Z having the same magnetic pole at an intersection angle of 90 degrees. The magnetic pole surface 40Y2b of the Y-direction second positioning magnet 40Y2 on the other side is opposite to the second magnetic pole surface 72b of the Z-direction driving magnet 30Z having the same magnetic pole at an intersection angle of 90 degrees. At this time, the first magnetic pole face 72a and the magnetic pole face 40Y2a of the second positioning magnet 40Y2 in the Y direction on one side are set to intersect on their extension, and the second magnetic pole face 72b and the magnetic pole face 40Y2b of the second positioning magnet 40Y2 in the Y direction on the other side are set to intersect on their extension. In this modified example, a rebound force in the Y direction relative to the stator 12 also acts on the mover 14. In addition, the positioning in the Z direction is also the same. In addition, the same is true when the preload is generated.

[0070] In addition, in the above two embodiments, the driving magnet and the positioning magnet are opposite to each other at an intersection angle of 180 degrees or 90 degrees, but the present invention is not limited thereto. As long as the mover can achieve balance and stop, the relative (intersecting) angle between the driving magnet and the positioning magnet is not limited. At this time, the positional relationship between the pole faces of the driving magnet and the pole faces of the positioning magnet is preferably to intersect on their extension. This can prevent the pole face of the party that is not opposite to the positioning magnet from being attracted by the pole face of the driving magnet. In addition, the configuration in which the pole faces of the positioning magnet and the pole faces of the driving magnet face opposite to each other is equivalent to intersecting on an extension to infinity. In addition, in the above two embodiments, the positioning magnet is respectively provided on the stator, and the driving magnet is provided on the mover. Conversely, the driving magnet is provided on the stator, and the positioning magnet is provided on the mover. In addition, the magnet group 42 is described using 4 groups of magnet groups 42, but if there are 2 groups, the rebound force can be balanced and it can be applied. Furthermore, three sets of magnet groups 42 can also be balanced and applicable. The same is true for five or more sets.

[0071] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A lens driving device, characterized in that: include: stator; A mover, the mover moves relative to the stator along a direction perpendicular to the optical axis of the lens; A magnet group, the magnet group includes a driving magnet and a positioning magnet facing the driving magnet, and the magnetic pole faces of the driving magnet and the positioning magnet facing each other are magnetized to the same magnetic pole; in The stator is provided with a plurality of the driving magnets arranged along a circumferential direction centered on the optical axis of the lens, and the mover is provided with a plurality of the positioning magnets forming a plurality of the magnet groups together with the plurality of the driving magnets; or The mover is provided with a plurality of the driving magnets arranged in a circumferential direction around the optical axis of the lens, and the stator is provided with a plurality of the positioning magnets forming a plurality of magnet groups together with the plurality of driving magnets.

2. The lens driving device according to claim 1, characterized in that: The plurality of magnet groups are arranged at equal intervals along a circumferential direction centered on the optical axis of the lens.

3. The lens driving device according to claim 1, characterized in that: The positioning magnetic pole surface of the positioning magnet is directly opposite to the driving magnetic pole surface of the driving magnet.

4. The lens driving device according to claim 1, characterized in that: The positioning magnetic pole surface of the positioning magnet intersects with the driving magnetic pole surface of the driving magnet; The intersection line of the positioning magnetic pole surface of the positioning magnet and the driving magnetic pole surface of the driving magnet is located on the extension surface of the positioning magnetic pole surface of the positioning magnet and the driving magnetic pole surface of the driving magnet.

5. The lens driving device according to claim 4, characterized in that: The angle between the positioning magnetic pole surface of the positioning magnet and the driving magnetic pole surface of the driving magnet is a right angle.

6. The lens driving device according to claim 1, characterized in that: The driving magnetic pole surface of the driving magnet faces a direction perpendicular to the optical axis of the lens.

7. The lens driving device according to claim 4, characterized in that: The driving magnet has a first driving magnetic pole surface and a second driving magnetic pole surface, wherein the first driving magnetic pole surface and the second driving magnetic pole surface having a magnetic pole opposite to the first driving magnetic pole surface are arranged along the optical axis direction of the lens; The first positioning magnetic pole surface on one side of the positioning magnet is opposite to the first driving magnetic pole surface, and the second positioning magnetic pole surface on the other side of the positioning magnet opposite to the first positioning magnetic pole surface on one side is opposite to the second driving magnetic pole surface; or There are two positioning magnets, a positioning magnetic pole surface of one positioning magnet is opposite to the first driving magnetic pole surface, and a positioning magnetic pole surface of the other positioning magnet is opposite to the second driving magnetic pole surface.

8. The lens driving device according to claim 7, characterized in that: In the lens optical axis direction, the center positions of the first driving magnetic pole surface and the second driving magnetic pole surface of the driving magnet are offset from the center positions of the two positioning magnetic pole surfaces of the positioning magnet.

9. A photographing device comprising a lens driving device, a lens mounted on a mover on the lens driving device and through which light emitted from a subject passes, and an image sensor receiving the light passing through the lens; characterized in that: The lens driving device is the lens driving device according to any one of claims 1 to 8.

10. An electronic device comprising a camera, characterized in that: The camera device is the camera device according to claim 9.

Images