Imaging apparatus and portable electronic equipment

Abstract

To provide an imaging apparatus and portable electronic equipment.SOLUTION: The imaging apparatus includes a base, a lens unit having an optical axis, an imaging device unit, a first movable frame, a second movable frame, a plurality of first balls, a plurality of second balls, first drive mechanism, and second drive mechanism. The first drive mechanism is supported in a rollable fashion by the base via the plurality of first balls, the first drive mechanism drives the first movable frame in such a manner that the first movable frame revolves centering on the optical axis and / or moves in the radial direction of the optical axis, and the second movable frame is supported in a rollable fashion by the first movable frame via the plurality of second balls in such a manner that the second movable frame can revolve. The imaging device unit is secured to the second movable frame, and the second drive mechanism drives the second movable frame in such a manner that the imaging device unit moves along the axial direction of the optical axis and / or yaws centering on a direction perpendicular to the optical axis. The present invention achieves the objective of more efficient vibration correction and of auto-focusing and improves the quality of captured images, as compared with the portable electronic equipment based on prior art.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to the technical field of imaging devices, and more particularly to imaging devices and portable electronic devices. [Background technology]

[0002] 2. Description of the Related Art With the rapid development of imaging technology, imaging devices including lenses are widely applied to various portable electronic devices such as mobile phones and tablet computers, and driving mechanisms for driving and moving lenses are widely used in various imaging devices.

[0003] Conventional drive mechanisms often include a coil and a magnet, with the coil fixed to the outer periphery of the lens frame. After electricity is passed through the coil to generate a magnetic field, the lens is moved along the optical axis by the action of electromagnetic force to achieve the focusing function, and the lens is moved on a plane perpendicular to the optical axis to achieve the image stabilization function.

[0004] Currently, in the case of an optical system with a long optical axis or when a glass lens is used to improve the imaging quality of an imaging device, the weight of the lens may increase significantly. Therefore, when the movement of the lens is driven by a driving mechanism, the driving mechanism needs to provide a large driving force so that the driving mechanism can drive the movement of a heavy lens. In this way, the driving mechanism or imaging device needs to develop in the direction of "enlarging". This does not match the current development direction of "miniaturization" of imaging devices.

[0005] Furthermore, in conventional drive mechanisms, the focus drive is provided in the lens and the image stabilization drive is provided in the sensor, making it difficult to align the lens, focus drive, and image stabilization drive during assembly, resulting in reduced optical performance.

[0006] For this reason, it is necessary to develop imaging devices in the direction of miniaturization and provide imaging devices that allow easy alignment of the optical axis during assembly. Summary of the Invention [Problem to be solved by the invention]

[0007] SUMMARY OF THE PRESENT EMBODIMENT In order to solve the technical problems in the prior art, an object of the present invention is to provide an imaging device and a portable electronic device that can reduce the space occupied and simplify the alignment of the optical axis during assembly. [Means for solving the problem]

[0008] According to a first aspect, the present invention provides an imaging device including: a housing having a storage cavity; a base fixed to the housing; a lens unit fixed to the housing and having an optical axis; an imaging element unit arranged in the storage cavity; a first movable frame; a second movable frame; a plurality of first balls; a plurality of second balls; a first driving mechanism; and a second driving mechanism; a first through groove is formed in the first movable frame along the optical axis direction, and the first movable frame is supported by the base via the first balls so as to be rollable; the second movable frame is supported by the first movable frame so as to be able to roll via the plurality of second balls, the second movable frame has a second through groove formed therethrough in the optical axis direction, a first annular protrusion is formed on an inner wall surface of the second through groove along the optical axis direction on a side opposite to a light receiving side of the optical axis, the first annular protrusion extends at least partially within the first through groove, and the image sensor unit is fixed to the first annular protrusion and corresponds to the second through groove along the optical axis direction, The first drive mechanism is used to drive the movement of the first movable frame so that the second movable frame and the image sensor unit rotate about the optical axis as a center line and / or move within a plane perpendicular to the optical axis, and the second drive mechanism is used to drive the movement of the second movable frame so that the image sensor unit moves along the optical axis direction and / or yaws around a direction perpendicular to the optical axis.

[0009] In the imaging device as described above, preferably, the first driving mechanism includes a first magnet fixed to a first movable frame and a first coil facing the first magnet and provided on the base, the second driving mechanism includes a second coil provided on the second movable frame and corresponding to the first magnet, and the first magnet, the first coil and the second coil are all provided in plurality, and the plurality of first magnets, the plurality of first coils and the plurality of second coils correspond to each other in a one-to-one manner.

[0010] In the imaging device as described above, preferably, the first driving mechanism further includes a first yoke and a first circuit board, the first circuit board is provided on the base, the first coil and the first yoke are both provided on the first circuit board, a plurality of the first yokes are provided, and the plurality of the first coils and the plurality of the first yokes correspond to each other in a one-to-one relationship, The second driving mechanism further includes a second yoke and a second circuit board, the second circuit board is provided on the second movable frame, the second coil and the second yoke are both provided on the second circuit board, a plurality of the second yokes are provided, and the plurality of the second coils and the plurality of the second yokes correspond to each other in a one-to-one manner.

[0011] In the imaging device as described above, preferably, four of the first coils are provided, the four first coils are distributed rotationally symmetrically with the optical axis as a center line, and the extension directions of adjacent first coils are arranged perpendicular to each other, The number of the second coils provided is four, the four second coils are distributed rotationally symmetrically with the optical axis as a center line, and the extension directions of the adjacent second coils are arranged perpendicular to each other.

[0012] In the imaging device as described above, preferably, the first coil and the second coil are both racetrack-shaped coils, and the imaging device further includes a position sensor provided in the first coil and the second coil.

[0013] In an imaging device as described above, preferably, the second movable frame has a guide groove on the side opposite to the light receiving side in the optical axis direction, a predetermined included angle is formed between the extension direction of the guide groove and a plane perpendicular to the optical axis direction, a plurality of the guide grooves are provided, the plurality of guide grooves correspond one-to-one to the plurality of second balls, one end of the second ball extends into the guide groove and is rotatably connected to the second movable frame, and one end of the second ball adjacent to the first movable frame is rotatably connected to the first movable frame.

[0014] In the imaging device as described above, the second ball is preferably made of a magnetic material.

[0015] In the imaging device as described above, preferably, the base has a first groove on the light receiving side in the optical axis direction, the first movable frame has a second groove on the opposite side to the light receiving side in the optical axis direction, a first plate is provided in the first groove, and a second plate is provided in the second groove, and the first ball is at least partially accommodated in the first groove and is located between the first plate and the second plate.

[0016] In the imaging device as described above, preferably, a plurality of first vibration-damping buffer members are provided between the first movable frame and the base, the plurality of first vibration-damping buffer members being arranged in a ring shape at intervals on the base, and a plurality of second vibration-damping buffer members are provided between the outer wall surface of the first annular protrusion and the inner wall surface of the first through groove, the plurality of second vibration-damping buffer members being arranged in a ring shape at intervals within the first through groove.

[0017] In the imaging device as described above, preferably, a flexible conductive substrate is provided within the accommodating cavity, the flexible conductive substrate having a plate surface structure with at least two bends or a plate spring-shaped plate surface structure that can be driven in a planar direction perpendicular to the optical axis, the accommodating cavity has a space for moving the curved surface of the flexible conductive substrate, one end of the flexible conductive substrate is connected to the imaging element unit and the other end is fixed to the base, and the flexible conductive substrate extends at least partially outside the accommodating cavity.

[0018] In the imaging device as described above, preferably, the imaging element unit includes a filter and an image sensor arranged in order along the incident direction of a light beam, the filter and the image sensor are both fixed within a mounting seat, and the mounting seat is integrally molded with the second movable frame.

[0019] In the imaging device as described above, preferably, the first movable frame extends along the optical axis direction on the side opposite to the light receiving side of the optical axis to form a cylinder, the inner wall surface of the cylinder is flush with the outer wall surface of the first annular protrusion, a first position regulating ring protrudes from the inner wall surface of the cylinder toward the first annular protrusion, a second position regulating ring protrudes from the outer wall surface of the first annular protrusion toward the cylinder, and the second ball is rotatably disposed between the first position regulating ring and the second position regulating ring, and is rotatably connected to the inner wall surface of the cylinder and the outer wall surface of the first annular protrusion.

[0020] In the imaging device as described above, preferably, the first movable frame has an accommodating groove on the light receiving side of the optical axis, a predetermined included angle is formed between the extension direction of the inner wall surface on one side of the accommodating groove and the optical axis direction, a convex block extending along the optical axis direction toward the first movable frame is provided at a position corresponding to the accommodating groove on the second movable frame, and one end of the second ball adjacent to the first movable frame extends into the accommodating groove and is rollably connected to the first movable frame, and one end adjacent to the second movable frame is rollably connected to the convex block.

[0021] In the imaging device as described above, the lens unit is preferably a zoom lens structure or a periscope lens structure.

[0022] In the imaging device as described above, preferably, the lens unit further includes an aperture structure capable of optically controlling the amount of light.

[0023] According to a second aspect, the present invention further provides a portable electronic device including an imaging device as described above. Effect of the Invention

[0024] Compared with the conventional technology, the imaging device of the present invention performs image stabilization by driving the first movable frame with the first driving mechanism to move the second movable frame and the imaging element unit, and performs focus adjustment and / or image stabilization by driving the second movable frame with the second driving mechanism to move the imaging element unit, thereby realizing optical image stabilization and autofocus in six axes directions only by the movement of the imaging element unit, which is advantageous for realizing a compact imaging device. Also, by fixing the lens unit and providing the imaging element unit on the second movable frame, the number of locations where optical misalignment can occur twice, that is, optical alignment on the conventional image stabilization assembly and optical alignment with the lens unit, can be reduced to only one location, that is, alignment between the image stabilization assembly and the fixed lens unit, which simplifies optical axis alignment during assembly of the imaging device and has the effect of minimizing deterioration of optical performance.

[0025] Since the lens unit is fixed, the lens unit will not move around when dropped, and there will be no impact caused by the heavy lens unit hitting other components, making it easier to design measures to prevent impact when dropped, facilitating alignment of the lens unit, and minimizing the opening through which the lens unit of a smartphone or the like protrudes from the electronic device. In addition, since the image sensor unit is concentrated in the image sensor unit in the present invention, it can be assembled with lens units having a variety of different structures and drive methods.

[0026] By supporting the first movable frame with a first ball and supporting the second movable frame with a second ball, it is possible to avoid drive failures and effects on image surface performance caused by deformation of the elastic material when dropped, which occurs when the movable frame body is supported by an elastic material as in conventional structures, and it is also possible to eliminate unnecessary resonance modes that the elastic material has, contributing to stable control of image stabilization.

[0027] As described above, the imaging device of the present invention can achieve the objective of realizing more efficient vibration reduction and autofocus in portable electronic devices that are becoming increasingly smaller, thereby improving the quality of captured images. [Brief description of the drawings]

[0028] [Figure 1] FIG. 1 is an exploded perspective view of an imaging device according to a first embodiment of the present invention. [Diagram 2] FIG. 1 is a perspective view of an imaging device according to a first embodiment of the present invention. [Diagram 3] FIG. 1 is a plan view of an imaging device according to a first embodiment of the present invention. [Figure 4] FIG. 4 is a cross-sectional view taken along line AA in FIG. [Diagram 5] FIG. 1 is a plan view of an imaging device according to a first embodiment of the present invention with a part of the structure hidden. [Figure 6] FIG. 2 is a perspective view of a base according to the first embodiment of the present invention. [Figure 7] FIG. 2 is a perspective view of a first movable frame according to the first embodiment of the present invention. [Figure 8] FIG. 2 is a perspective view of a second movable frame according to the first embodiment of the present invention. [Figure 9] FIG. 2 is a plan view of the first coil and the first magnet of the first embodiment according to the present invention during one-way shift operation in a plane perpendicular to the optical axis in a fitted state. [Figure 10] 1 is a plan view of the first coil and the first magnet of the first embodiment according to the present invention during a shift operation in the other direction in a plane perpendicular to the optical axis in a fitted state. FIG. [Figure 11] FIG. 2 is a plan view of the first coil and the first magnet according to the first embodiment of the present invention during a rotation operation with the optical axis as the center line in a fitted state. [Figure 12] 4 is a schematic diagram showing a shift operation along the optical axis in a fitted state of the second coil and the first magnet according to the first embodiment of the present invention. FIG. [Figure 13] 1 is a schematic diagram of a yawing operation around a direction perpendicular to the optical axis in a fitted state of a second coil and a first magnet according to a first embodiment of the present invention. FIG. [Figure 14]3 is a schematic diagram of a first type support structure of a second ball according to the first embodiment of the present invention. FIG. [Figure 15] 1 is a schematic diagram of a second type of support structure of a second ball according to a first embodiment of the present invention. FIG. [Figure 16] FIG. 2 is a schematic diagram of a third type of support structure for the second ball in the first embodiment of the present invention. [Figure 17] FIG. 11 is a schematic diagram of a fourth type support structure of the second ball in the first embodiment of the present invention. [Figure 18] FIG. 11 is a cross-sectional view of an imaging device according to a second embodiment of the present invention. [Figure 19] FIG. 11 is a cross-sectional view of an imaging device according to a third embodiment of the present invention. [Figure 20] FIG. 2 is a schematic diagram of a periscope lens structure according to an embodiment of the present invention. [Figure 21] 1 is a schematic diagram of a zoom lens structure according to an embodiment of the present invention; [Figure 22] FIG. 4 is a schematic diagram of a zoom lens structure according to an embodiment of the present invention from another angle. [Figure 23] 1 is a perspective view of a portable electronic device according to an embodiment of the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] The embodiments described below with reference to the drawings are illustrative and are intended to explain the present invention only and cannot be construed as limiting the present invention.

[0030] Example 1 1 to 19, an embodiment of the present invention provides an imaging device 100. The imaging device 100 includes a housing 11 having a housing cavity 11a, a base 15 fixed to the housing 11, a lens unit 12 fixed to the housing 11 and having an optical axis 300, an imaging element unit disposed within the housing cavity 11a, a first movable frame 16, a second movable frame 17, a plurality of first balls 18, a plurality of second balls 19, a first driving mechanism, and a second driving mechanism.

[0031] In one feasible embodiment, the housing 11 has a separate structure for easy assembly and maintenance. Specifically, the housing 11 includes a bottom plate 112 and a housing 111 covered by the bottom plate 112. The housing 111 has a box structure with an open bottom. The accommodating cavity 11a is formed by being surrounded by the housing 111 and the bottom plate 112. The housing 111 has a through hole 113 communicating with the accommodating cavity 11a. The lens unit 12 is fixed in the housing 11 by adhesive bonding, screwing or other connection methods. At least a part of the lens unit 12 protrudes from the through hole 113. Preferably, the lens unit 12 further includes an aperture structure capable of optically controlling the amount of light. The image sensor unit has an optical axis 300, and the axis of the through hole 113 overlaps with the axis of the optical axis 300.

[0032] The base 15 is fixed to the bottom wall surface of the accommodating cavity 11a, a first through groove 161 is formed in the first movable frame 16 along the direction of the optical axis 300, and the first movable frame 16 is rollably supported on the base 15 via a plurality of first balls 18, the first movable frame 16 is located on the light receiving side of the base 15 in the direction of the optical axis 300, and in one feasible embodiment, three first balls 18 are provided, and the three first balls 18 are arranged in a ring shape at approximately equal intervals in the circumferential direction of the optical axis 300, improving the stability and reliability of the support.

[0033] The first driving mechanism is used to drive the movement of the first movable frame 16 so that the second movable frame 17 and the image sensor unit rotate about the optical axis 300 and / or move within a plane perpendicular to the optical axis 300. The first driving mechanism and the first movable frame 16 form an anti-vibration correction assembly, which can achieve three-axis shake correction against shaking of the imaging device 100 caused by hand shake when a user takes a picture while holding the electronic device in his / her hand.

[0034] The second movable frame 17 is supported on the first movable frame 16 for rolling motion via a plurality of second balls 19, and the second movable frame 17 has a second through groove 171 extending in the direction of the optical axis 300. In one possible embodiment, four second balls 19 are provided, and the four second balls 19 are arranged in a ring shape at approximately equal intervals in the circumferential direction of the optical axis 300, thereby improving the stability and reliability of the support.

[0035] 1 and 4, the second through groove 171 has a first annular protrusion 172 formed on the opposite side of the light receiving side of the optical axis 300, and the imaging element unit includes a filter 13 and an image sensor 14 arranged in order along the incident direction of the optical axis 300. The filter 13 and the image sensor 14 are both fixed in a mounting seat 36. Alternatively, the mounting seat 36 may be integrally formed at the bottom end of the first annular protrusion 172, and in some embodiments, the filter 13 is an infrared cut filter 13, which generally protects the image sensor 14, blocks harmful wavelengths, cuts out unnecessary light, and passes only visible light.

[0036] The second driving mechanism is used to realize autofocus and two-axis vibration isolation of the imaging device by driving the movement of the second movable frame 17 so that the imaging element unit moves along the optical axis 300 and / or yawing about a direction perpendicular to the optical axis 300.

[0037] In the present invention, the first drive mechanism drives the movement of the first movable frame 16 to drive the movement of the second movable frame 17 and the imaging element unit to perform image stabilization, and the second drive mechanism drives the movement of the second movable frame 17 to drive the movement of the imaging element unit to perform focus adjustment and image stabilization, thereby realizing optical image stabilization and autofocus in six axial directions only by the movement of the imaging element unit, which is advantageous for miniaturization of the imaging device. At the same time, by providing the imaging element unit in the second movable frame 17, the number of locations where optical misalignment can occur twice, that is, optical alignment and optical alignment with the lens unit in the conventional image stabilization assembly, can be reduced to just one location, that is, alignment between the image stabilization assembly and the fixed lens unit, which simplifies optical axis alignment when assembling the imaging device and has the effect of minimizing deterioration of optical performance.

[0038] Since the lens unit is fixed, the lens unit does not move around when dropped, and there is no impact caused by the heavy lens unit hitting other components, making it easier to design measures to prevent impact when dropped and aligning the lens unit. The opening through which the lens unit of a smartphone or the like protrudes the electronic device can be reduced to the minimum. In addition, in the present invention, the image sensor unit is concentrated with the image stabilization and autofocus movements, so the lens unit can be assembled with lens units having various different structures and drive methods.

[0039] By supporting the first movable frame 16 with the first ball 18 and supporting the second movable frame 17 with the second ball 19, it is possible to avoid drive failures and effects on image surface performance caused by deformation of the elastic material when dropped, which occurs when the movable frame body is supported by an elastic material as in the conventional structure, and it is also possible to eliminate unnecessary resonance modes that the elastic material has, contributing to stable control of image stabilization.

[0040] In an embodiment of the present application, as shown in Figures 1 and 4, the first driving mechanism includes a first coil 20, a first yoke 21, a first magnet 22 and a first circuit board 23, the first circuit board 23 is provided on the base 15, the first coil 20 and the first yoke 21 are provided on the first circuit board 23, the first magnet 22 is provided on the first movable frame 16, the first magnet 22, the first coil 20 and the first yoke 21 are all provided in multiple numbers, the multiple first magnets 22, the multiple first coils 20 and the multiple first yokes 21 correspond one-to-one, and the first coil 20 is located between the first magnet 22 and the first yoke 21.

[0041] When electricity is applied to the first coil 20, a Lorentz force is generated in the first coil 20 due to the interaction between the magnetic field of the first magnet 22 and the current flowing through the first coil 20. The direction of the Lorentz force is perpendicular to the direction of the magnetic field of the first magnet 22 and the direction of the current flowing through the first coil 20. Since the first coil 20 is fixed, a reaction force acts on the first magnet 22. This reaction force becomes the driving force for the first movable frame 16, and the first movable frame 16 having the first magnet 22 moves on a plane perpendicular to the direction of the optical axis 300 or rotates around the optical axis 300, thereby performing vibration damping correction.

[0042] By changing the direction of the current through the first coil 20, the translation direction or rotation direction of the first movable frame 16 can be changed, enabling the first movable frame 16 to translate, rotate clockwise, and rotate counterclockwise within a plane perpendicular to the optical axis 300.

[0043] In one feasible embodiment, four first coils 20 are provided, and as shown in Figures 9 to 11, the four first coils 20 are distributed rotationally symmetrically with the axis of the optical axis 300 as the center line, the four first coils 20 are located at the four sides of a square structure, the extension directions of adjacent first coils 20 are arranged perpendicular to each other, two first coils 20 located at diagonal positions are parallel to each other, and two first coils 20 located on the same side are perpendicular to each other, and as will be understood by a person skilled in the art, four first magnets 22 and first yokes 21 corresponding to the first coils 20 are also provided, and all are arranged correspondingly.

[0044] As shown in Figure 9, when current is applied to two first coils 20 located in one diagonal position, the first coils 20 in the current-applied state apply a biasing force to the corresponding first magnets 22, while the first coils 20 not current-applied do not apply a biasing force to the corresponding first magnets 22, thereby allowing the first movable frame 16 to translate along a direction perpendicular to the optical axis 300. At this time, as shown in Figure 10, when current is applied to two first coils 20 in another diagonal position and current is not applied to the other two first coils 20, the first movable frame 16 can be translated along a direction perpendicular to the optical axis 300.

[0045] As shown in FIG. 11, when currents in different directions are applied to the four first coils 20, the four first magnets 22 receive a biasing force, causing the first movable frame 16 to rotate clockwise or counterclockwise.

[0046] In an embodiment of the present application, the first yoke 21 is attached to the first circuit board 23 and is formed into a structure that is attracted to the center of the first magnet 22. The first yoke 21 and the first magnet 22 have a magnetic spring effect that always attracts the first movable frame 16 to the center of the optical axis 300. The first yoke 21 and the first magnet 22 interact with each other, providing the effect of efficiently removing backlash, reducing the inclination of the first movable frame 16 with respect to the optical axis 300, and playing a role in returning the motion and holding down the first ball 18.

[0047] 4, 6, and 7, the base 15 is provided with a first groove 24 on the light receiving side in the direction of the optical axis 300, the first movable frame 16 is provided with a second groove 26 on the side opposite the light receiving side in the direction of the optical axis 300, a first plate 25 is provided in the first groove 24, a second plate 27 is provided in the second groove 26, the first ball 18 is provided between the first plate 25 and the second plate 27, one end of the first ball 18 close to the base 15 extends into the first groove 24, and the first plate 25 one end of the first movable frame 16 extends into the second groove 26 and is rollably connected to the second plate 27, so that the first movable frame 16 can move back and forth in a plane perpendicular to the direction of the optical axis 300 or rotate around the optical axis 300, and the multiple first plate bodies 25, the multiple second plate bodies 27 and the multiple first balls 18 correspond one-to-one to each other, thereby providing a balanced and uniform supporting force and preventing the first movable frame 16 from tilting during the movement process.

[0048] By accommodating the first ball 18 within the first groove 24 and the second groove 26, the movement of the first ball 18 can be positionally restricted, preventing the movement range of the first movable frame 16 from being too large, and enabling an overlapping area to exist between the projection of the first ball 18 in a direction perpendicular to the optical axis 300 and the base 15 and first movable frame 16. By overlapping the thicknesses of the base 15, the first movable frame 16, and the first ball 18, the space occupied by the first ball 18 can be reduced, contributing to the miniaturization of the imaging device 100 and improved protection against the impact of being dropped.

[0049] In the embodiment of the present application, as shown in Fig. 1 and Fig. 4, a plurality of first vibration damping buffer members 28 are provided between the first movable frame 16 and the base 15, and the plurality of first vibration damping buffer members 28 are provided in an annular shape at intervals on the base 15 so as to improve the well-balanced and distributed buffering and supporting action. As will be understood by those skilled in the art, the number and distribution of the first vibration damping buffer members 28 can be determined according to the actual situation and are not limited here. The first vibration damping buffer members 28 are preferably made of a vibration damping gel, and can have a more accurate vibration damping function by generating a vibration damping effect that controls the ripple action against the sudden current flow of the vibration-proof correction assembly. In this embodiment, the first vibration damping buffer member 28 is provided between the first magnet 22 and the base 15. As shown in Figures 1, 4 and 7, the first annular protrusion 172 extends into the first through groove 161, and a plurality of second vibration damping buffer members 29 are provided between the outer wall surface of the first annular protrusion 172 and the inner wall surface of the first through groove 161, and the plurality of second vibration damping buffer members 29 are provided in the first through groove 161 at intervals in an annular shape to improve the well-balanced and distributed buffering effect, and as will be understood by those skilled in the art, the number and distribution of the second vibration damping buffer members 29 can be determined according to the actual situation and are not limited here. The second vibration damping buffer members 29 are preferably made of a vibration damping gel, and can have a more accurate vibration-proofing function by generating a vibration damping effect that controls the ripple action against the sudden current flow of the second movable frame 17.

[0050] In an embodiment of the present application, the second drive mechanism includes a second yoke 30, a second coil 31 and a second circuit board 32, the second circuit board 32 is provided on the second movable frame 17, the first coil 20 and the second coil 31 are both racetrack-shaped coils, the second coil 31 and the second yoke 30 are both provided on the second circuit board 32, there are multiple second yokes 30 and second coils 31, the multiple first magnets 22, the multiple second coils 31 and the multiple second yokes 30 correspond one-to-one, and the second coil 31 is located between the first magnet 22 and the second yoke 30.

[0051] When electricity is applied to the second coil 31, a Lorentz force is generated in the second coil 31 due to the interaction between the magnetic field of the first magnet 22 and the current flowing through the second coil 31, which becomes the driving force for the second movable frame 17. The second movable frame 17 having the second coil 31 moves along the axial direction of the optical axis 300 or yawing around a direction perpendicular to the optical axis 300, thereby performing autofocus and image stabilization.

[0052] By changing the direction of the current through the second coil 31, the direction of movement of the second movable frame 17 along the axial direction of the optical axis 300 or the yawing direction of the movement with a center line perpendicular to the optical axis 300 can be changed.

[0053] In one feasible embodiment, four second coils 31 are provided, and as shown in Figures 12 and 13, the four second coils 31 are distributed rotationally symmetrically with the axis of the optical axis 300 as the center line, the four second coils 31 are located at the four sides of a square structure, the extension directions of adjacent second coils 31 are arranged perpendicular to each other, two second coils 31 located at diagonal positions are parallel to each other, and two second coils 31 located on the same side are perpendicular to each other, and as will be understood by a person skilled in the art, four second yokes 30 corresponding to the second coils 31 are also provided, and all of them are arranged correspondingly.

[0054] Since the first coil 20 and the second coil 31 can share the first magnet 22 for driving, there is no need to provide a separate magnet or driving structure, which contributes to miniaturization and easier assembly by significantly reducing the number of parts.

[0055] As shown in FIG. 12, when electricity is applied to the second coil 31, the second coils 31 on both sides receive a biasing force in the same direction, causing the second movable frame 17 in which the second coils 31 are located to move up and down along the direction of the optical axis 300.

[0056] As shown in FIG. 13, when current is applied to the second coil 31, the second coils 31 on both sides are subjected to biasing forces in opposite directions, causing the second movable frame 17 in which the second coils 31 are located to yaw around a center line perpendicular to the optical axis 300.

[0057] Furthermore, as shown in FIG. 8 , the second movable frame 17 has a guide groove 173 on the side opposite the light receiving side in the direction of the optical axis 300, and a predetermined included angle is formed between the extension direction of the guide groove 173 and a plane perpendicular to the optical axis 300. One end of the second ball 19 approaching the second movable frame 17 extends within the guide groove 173 and is rotatably connected to the second movable frame 17, and one end of the second ball 19 approaching the first movable frame 16 is rotatably connected to the first movable frame 16 so as to facilitate yawing movement of the second movable frame 17.

[0058] In one possible embodiment, the second ball 19 is made of a magnetic material, and the first magnet 22 attracts the second yoke 30 provided on the second movable frame 17 and the magnetic second ball 19, and in summary, when the second movable frame 17 yawing motions in the direction of the optical axis 300 and / or around a direction perpendicular to the optical axis, the second ball 19 is biased to roll outward or inward by the guide groove 173 obliquely provided on the second movable frame 17. However, since the second ball 19 is magnetic, the second ball 19 returns to the center position of the first magnet 22 due to the attractive force received by it, thereby providing a restoring force to the movement of the second movable frame 17.

[0059] Furthermore, although the base 15, the first movable frame 16 and the second movable frame 17 are magnetically attracted to each other, by deliberately making them separable when an impact is applied, the impact can be dispersed to a certain strength position of the components rather than being concentrated on the first ball 18 and the second ball 19, thereby preventing destruction of the support members (the first ball 18 and the second ball 19), which are weak points of the movable structure (the first movable frame 16 and the second movable frame 17).

[0060] This prevents the impact that is common in commercially available imaging devices 100 from concentrating on the support member and causing damage to the support member, resulting in a malfunction of the device, and makes it possible to obtain a safe structure that allows the device to be fully re-driven even after an impact is applied.

[0061] In some embodiments, the imaging device 100 further includes a position sensor provided within the first coil 20 and the second coil 31, and specifically, the position sensor includes a first position detection element 33 and a second position detection element 34.

[0062] 1 and 4, the first circuit board 23 is equipped with a first position detection element 33 capable of detecting the magnetic flux of the first magnet 22, and preferably at least three first position detection elements 33 are provided, and by detecting the magnetic flux of the first magnet 22, accurate position detection and vibration control can be performed for the first movable frame 16. Not only movement in a plane perpendicular to the optical axis 300 but also the amount of rotation when performing a rotational operation about the optical axis 300 can be detected, which enables accurate position detection and vibration control.

[0063] Continuing to show in Figures 1 and 4, the second circuit board 32 is equipped with a second position detection element 34 capable of detecting the magnetic flux of the first magnet 22. Preferably, at least three second position detection elements 34 are provided. By detecting the magnetic flux of the first magnet 22, it is possible to detect the position of movement along the optical axis 300 relative to the second movable frame 17, and to detect the position when performing rotation, pitching motion, and yawing motion based on an axis perpendicular to the optical axis 300, thereby enabling accurate position detection and vibration control.

[0064] As shown in Fig. 5, the signal lines and power lines of the first coil 20, the first position detection element 33, the second coil 31, and the second position detection element 34 can be connected to a flexible conductive substrate 35 for the image sensor unit and wired outside the image sensor unit and the focus adjustment assembly so as not to interfere with the operation of the image sensor unit and the focus adjustment assembly. The flexible conductive substrate 35 has a plate surface structure having at least two bends, one end of which is connected to the image sensor unit and the other end of which is fixed to the base 15, and at least partially extends outside the accommodation cavity 11a, and a movable space is provided within the accommodation cavity 11a so that at least the curved surface of the flexible conductive substrate 35 does not interfere with the operation when it moves on a plane. The flexible conductive substrate 35 may have a plate surface structure in the shape of a leaf spring that can be driven in a plane direction perpendicular to the optical axis, such as a so-called "stretchable FPC".

[0065] As can be selected, the shape of the guide groove of the second ball 19 can be designed according to specific needs, and the present application is not limited thereto. For example, as shown in FIG. 14, guide grooves 173 are provided at corresponding positions of the first movable frame 16 and the second movable frame 17, and the guide grooves 173 have a V-shaped structure, and both ends of the second ball 19 abut against the two opposing guide grooves 173.

[0066] As shown in FIG. 15, the first movable frame 16 has a guide groove 173, the guide groove 173 having a V-shaped structure, the second movable frame 17 having a flat surface, and one end of the second ball 19 abutting within the guide groove 173 and the other end abutting against the second movable frame 17.

[0067] As shown in FIG. 16, the first movable frame 16 has a guide groove 173 which is a rectangular groove, the second movable frame 17 is flat, and one end of the second ball 19 abuts within the guide groove 173 and the other end abuts against the second movable frame 17.

[0068] As shown in FIG. 17, the second movable frame 17 has a guide groove 173, which is a rectangular groove, the first movable frame 16 is flat, and one end of the second ball 19 abuts within the guide groove 173 and the other end abuts against the first movable frame 16.

[0069] Example 2 As shown in FIG. 18, the multiple first magnets 22 are arranged in the circumferential direction of the first through groove 161, the first movable frame 16 has a cylindrical body 162 formed on the side opposite the light receiving side of the optical axis 300, the inner wall surface of the cylindrical body 162 is flush with the outer wall surface of the first annular protrusion 172, and a first position regulating ring 163 is protruded from the inner wall surface of the cylindrical body 162 toward the first annular protrusion 172, in this respect differing from the first embodiment.

[0070] A second position restriction ring 174 is provided on the outer wall surface of the first annular projection 172 so as to protrude toward the cylindrical body 162 .

[0071] The second ball 19 is located between the first position regulating ring 163 and the second position regulating ring 174, and the side of the second ball 19 closest to the cylindrical body 162 is rollably connected to the inner wall surface of the cylindrical body 162, and the side of the second ball 19 closest to the first annular protrusion 172 is rollably connected to the outer wall surface of the first annular protrusion 172.

[0072] The second coil 31 and the second yoke 30 are both provided on the outer wall surface of the first annular protrusion 172 , and the second coil 31 is located between the first magnet 22 and the second yoke 30 .

[0073] In this embodiment, the second ball 19 is made of a non-magnetic material, and is positioned on the central side of the optical axis 300. The first magnet 22 attracts the second yoke 30, thereby holding the second movable frame 17 in the center of the movement direction.

[0074] The effectiveness of this structure is as advantageous as implementation 1.

[0075] Example 3 In this embodiment, a plurality of first magnets 22 are arranged in the circumferential direction of the first through groove 161, the first movable frame 16 is provided with an accommodating groove 164 on the light receiving side of the optical axis 300, a predetermined included angle is formed between the extension direction of the inner wall surface of the accommodating groove 164 on the side close to the first magnet 22 and the direction of the optical axis 300, and a magnetic adsorption portion 165 is provided on the side of the accommodating groove 164 away from the first magnet 22, and the magnetic adsorption portion 165 is made of a magnetic material, which is different from embodiment 2.

[0076] A convex block 175 extending toward the first movable frame 16 along the optical axis 300 is provided at a position in the second movable frame 17 corresponding to the accommodation groove 164 .

[0077] The second ball 19 has one end adjacent to the first movable frame 16 extending into the accommodation groove 164 and rollably connected to the first movable frame 16, and one end adjacent to the second movable frame 17 connected to the protruding block 175, The second coil 31 and the second yoke 30 are both provided on the second movable frame 17 , and the second coil 31 is located between the first magnet 22 and the second yoke 30 .

[0078] The first magnetic pole attracts the magnetic adsorption portion 165 on the first movable frame 16 and presses the second ball 19 against the inclined surface of the accommodating groove 164 of the first movable frame 16 in a central direction perpendicular to the optical axis 300, and further the first magnet 22 attracts the second yoke 30 and presses the second movable frame 17 in the direction of the optical axis 300, thereby holding the second movable frame 17 in the center of the movement direction.

[0079] The structural effect is as advantageous as that of the first embodiment.

[0080] The imaging device 100 of the embodiment is an autofocus lens structure, and in some embodiments, as shown in Fig. 20, the above imaging device 100 may be applied to a periscope lens structure 400, which further includes a first prism 401 located on the object side of the lens unit 12 and / or a second prism 402 located on the image side of the lens unit 12, and the first prism 401 and the second prism 402 are used to change the direction of the optical path. By providing the first prism 401 and / or the second prism 402 that can change the optical path, the volume of the imaging device 100 can be reduced, which is advantageous for miniaturization and portability of the imaging device 100.

[0081] 21 and 22, the above-mentioned imaging device 100 may be applied to a zoom lens structure 500, in which the lens unit 12 includes at least two lenses spaced apart along the optical axis 300, and the zoom lens structure 500 can change the distance between the two lenses along the optical axis 300, specifically, the lens unit 12 including multiple lenses can perform telescopic motion. Providing the zoom lens structure 500 is advantageous not only for improving the imaging effect of the imaging device 100, but also for improving the user's experience.

[0082] Based on the above embodiment, the present invention further provides a portable electronic device 200, such as a smart phone or a tablet device, as shown in FIG. 23, both of which include the imaging device 100 described above.

[0083] The above describes in detail the structure, features and effects of the present invention based on the embodiments shown in the drawings. However, the above is only a preferred embodiment of the present invention, and the present invention is not limited to the scope of implementation shown in the drawings. Any modifications made to the concept of the present invention or equivalent modifications to equivalent embodiments that are equivalent changes should still fall within the scope of protection of the present invention, provided that they do not exceed the spirit contained in the specification and drawings. [Explanation of symbols]

[0084] 100 Imaging device 11. Cabinet 11a Storage cavity 111 Housing 112 Bottom plate 113 Through Hole 12 Lens unit 13 Filters 14 Image Sensor 15 Base 16 First movable frame 161 First Through Hole 162 Cylinder 163 First position control ring 164 Storage Groove 165 Magnetic Adsorption Part 17 Second movable frame 171 Second Through Hole 172 First annular protrusion 173 Guide groove 174 Second position control ring 175 Convex Block 18 First Ball 19 Second Ball 20 First coil 21 First York 22 First Magnet 23 1st circuit board 24 1st groove 25 1st plate 26 Second groove 27 Second plate 28 First vibration damping member 29 Second vibration damping member 30 Second York 31 Second coil 32 2nd circuit board 33 First position detection element 34 Second position detection element 35 Flexible conductive substrate 36 Mounting seat 200 Portable Electronic Devices 300 Optical axis 400 Periscope lens structure 401 First Prism 402 Second Prism 500 Zoom lens structure

Claims

1. 1. An imaging device, comprising: the imaging device includes a housing having a housing cavity, a base fixed to the housing, a lens unit fixed to the housing and having an optical axis, an imaging element unit arranged in the housing cavity, a first movable frame, a second movable frame, a plurality of first balls, a plurality of second balls, a first driving mechanism, and a second driving mechanism; a first through groove is formed through the first movable frame along the optical axis direction, and the first movable frame is supported by the base via the first balls so as to be rollable; the second movable frame is supported by the first movable frame so as to be able to roll via the plurality of second balls, the second movable frame has a second through groove formed therethrough in the optical axis direction, a first annular protrusion is formed on an inner wall surface of the second through groove along the optical axis direction on a side opposite to a light receiving side of the optical axis, the first annular protrusion extends at least partially within the first through groove, and the image sensor unit is fixed to the first annular protrusion and corresponds to the second through groove along the optical axis direction, An imaging device characterized in that the first drive mechanism is used to drive the movement of the first movable frame so that the second movable frame and the image sensor unit rotate about the optical axis as a center line and / or move within a plane perpendicular to the optical axis, and the second drive mechanism is used to drive the movement of the second movable frame so that the image sensor unit moves along the optical axis direction and / or yaws around a direction perpendicular to the optical axis.

2. The imaging device described in claim 1, characterized in that the first driving mechanism includes a first magnet fixed to a first movable frame and a first coil facing the first magnet and provided on the base, the second driving mechanism includes a second coil provided on the second movable frame and corresponding to the first magnet, and the first magnet, the first coil and the second coil are all provided in multiple numbers, and the multiple first magnets, the multiple first coils and the multiple second coils correspond to each other in a one-to-one manner.

3. the first driving mechanism further includes a first yoke and a first circuit board, the first circuit board is provided on the base, the first coil and the first yoke are both provided on the first circuit board, a plurality of the first yokes are provided, and the plurality of the first coils and the plurality of the first yokes correspond to each other in a one-to-one relationship; 3. The imaging device of claim 2, wherein the second driving mechanism further includes a second yoke and a second circuit board, the second circuit board is provided on the second movable frame, the second coil and the second yoke are both provided on the second circuit board, a plurality of the second yokes are provided, and the plurality of the second coils and the plurality of the second yokes correspond to each other in a one-to-one relationship.

4. The first coil is provided in four pieces, the four first coils are distributed rotationally symmetrically with the optical axis as a center line, and the extension directions of adjacent first coils are arranged perpendicular to each other, The imaging device according to claim 3, characterized in that four of the second coils are provided, the four second coils are distributed rotationally symmetrically with the optical axis as a center line, and the extension directions of adjacent second coils are arranged perpendicular to each other.

5. 3. The imaging device according to claim 2, wherein the first coil and the second coil are both racetrack-shaped coils, and the imaging device further includes a position sensor provided within the first coil and the second coil.

6. The imaging device described in claim 1, characterized in that a guide groove is provided in the second movable frame on the side opposite the light receiving side in the optical axis direction, a predetermined included angle is formed between the extension direction of the guide groove and a plane perpendicular to the optical axis direction, the guide groove is provided in plurality, the plurality of guide grooves correspond one-to-one to the plurality of second balls, one end of the second ball extends into the guide groove and is rotatably connected to the second movable frame, and one end of the second ball adjacent to the first movable frame is rotatably connected to the first movable frame.

7. 7. The imaging device according to claim 6, wherein the second ball is made of a magnetic material.

8. 2. The imaging device of claim 1, wherein the base has a first groove on the light receiving side in the optical axis direction, the first movable frame has a second groove on the side opposite the light receiving side in the optical axis direction, a first plate is provided in the first groove, and a second plate is provided in the second groove, and the first ball is at least partially contained in the first groove and is located between the first plate and the second plate.

9. A plurality of first vibration damping members are provided between the first movable frame and the base, and the plurality of first vibration damping members are provided in an annular shape on the base at intervals; The imaging device according to claim 1, characterized in that a plurality of second vibration damping members are provided between an outer wall surface of the first annular protrusion and an inner wall surface of the first through groove, and the plurality of second vibration damping members are arranged in a ring shape at intervals within the first through groove.

10. The imaging device according to claim 1, characterized in that a flexible conductive substrate is provided within the accommodating cavity, the flexible conductive substrate having a plate surface structure with at least two bends or a plate spring-shaped plate surface structure that can be driven in a planar direction perpendicular to the optical axis, the accommodating cavity has a space for moving the curved surface of the flexible conductive substrate, one end of the flexible conductive substrate is connected to the imaging element unit and the other end is fixed to the base, and the flexible conductive substrate extends at least partially outside the accommodating cavity.

11. The imaging device according to claim 1, characterized in that the image sensor unit includes a filter and an image sensor arranged in sequence along the direction of incidence of light rays, the filter and the image sensor are both fixed within a mounting seat, and the mounting seat is integrally molded with the second movable frame.

12. the first movable frame is formed with a cylindrical body extending along the optical axis direction on a side opposite to the light receiving side of the optical axis, an inner wall surface of the cylindrical body is flush with an outer wall surface of the first annular protrusion, and a first position restricting ring is provided on the inner wall surface of the cylindrical body so as to protrude toward the first annular protrusion, A second position restriction ring is provided on an outer wall surface of the first annular protrusion so as to protrude toward the cylindrical body. The imaging device according to claim 1, characterized in that the second ball is rollably arranged between the first position limiting ring and the second position limiting ring, and is rollably connected to the inner wall surface of the cylindrical body and the outer wall surface of the first annular protrusion.

13. the first movable frame is provided with an accommodation groove on a light receiving side of the optical axis, a predetermined included angle is formed between an extension direction of an inner wall surface on one side of the accommodation groove and the optical axis direction, and a convex block extending along the optical axis direction to the first movable frame is provided at a position of the second movable frame corresponding to the accommodation groove, The imaging device described in claim 1, characterized in that one end of the second ball adjacent to the first movable frame extends into the accommodating groove and is rollably connected to the first movable frame, and one end of the second ball adjacent to the second movable frame is rollably connected to the convex block.

14. 14. The imaging device according to claim 1, wherein the lens unit has a zoom lens structure or a periscope lens structure.

15. 14. The imaging device according to claim 1, wherein the lens unit further includes an aperture structure capable of optically controlling an amount of light.

16. A portable electronic device comprising the imaging device according to claim 1 .

Images