CN116594142B - Lens driving device, camera module and mobile terminal - Google Patents
Lens driving device, camera module and mobile terminal Download PDFInfo
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- CN116594142B CN116594142B CN202310135353.1A CN202310135353A CN116594142B CN 116594142 B CN116594142 B CN 116594142B CN 202310135353 A CN202310135353 A CN 202310135353A CN 116594142 B CN116594142 B CN 116594142B
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- 229910000679 solder Inorganic materials 0.000 claims description 6
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- 210000001503 joint Anatomy 0.000 abstract description 5
- 238000005452 bending Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 235000014676 Phragmites communis Nutrition 0.000 description 2
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- 239000003990 capacitor Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
- G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
- G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Adjustment Of Camera Lenses (AREA)
Abstract
The invention provides a lens driving device, an image pickup module and a mobile terminal. The lens driving device comprises a shell and a base assembly, wherein the shell is covered on the base assembly and forms a containing space with the base assembly, and the lens driving device further comprises a lens arranged in the containing space: an anti-shake frame; a lens support; the circuit connecting assembly is respectively connected with the anti-shake frame, the lens supporting body and the base assembly; the driving magnet assembly is arranged on the anti-shake frame; the first driving coil component is arranged on the lens support body corresponding to the driving magnet component; the second driving coil component is arranged on the base component corresponding to the driving magnet component; and the sliding shaft is arranged on the inner side wall of the anti-shake frame, the lens support body is in butt joint with the sliding shaft, and the axial direction of the sliding shaft is parallel to the Z axis. The invention solves the problem of poor usability of the lens driving device in the prior art.
Description
Technical Field
The present invention relates to the field of optical lens apparatuses, and in particular, to a lens driving device, an imaging module, and a mobile terminal.
Background
The miniature automatic focusing camera is widely applied to products such as mobile phones, automobiles, unmanned planes, security monitoring, intelligent home furnishings and the like. The common miniature automatic focusing camera is characterized in that a voice coil motor drives a lens to move along the optical axis of the camera; the general voice coil motor mainly comprises a shell, a lens bracket movably matched in the shell through an upper spring and a lower spring, a driving coil matched on the lens bracket and at least two driving magnets fixed in the shell, wherein the lens is fixed on the lens bracket, a light passing hole opposite to the lens is formed in the shell, and when the voice coil motor is used, the current input to the driving coil is controlled through a control chip, so that the driving magnets and the driving coils interact to drive the lens bracket to overcome the elastic force of the spring to move, and the function of automatic focusing is realized. However, when photographing, the lens cannot be kept absolutely stable due to shake of a person or other reasons, a certain offset is generated, and at the moment, the focusing and the light incoming quantity of the camera are influenced, so that the quality of an image acquired by the camera is influenced.
For this reason, the prior art has developed an anti-shake actuator that can drive a voice coil motor to move in a direction perpendicular to an optical axis of a lens, thereby compensating for a shift of the lens due to human shake or other causes. However, the existing anti-shake and focusing lens driving structure is complex, the assembly difficulty is high, and the focusing and anti-shake performance is poor.
Therefore, the prior art has a problem of poor usability of the lens driving apparatus.
Disclosure of Invention
The invention provides a lens driving device, an image pickup module and a mobile terminal, which are used for solving the problem of poor usability of the lens driving device in the prior art.
In order to achieve the above object, according to one aspect of the present invention, there is provided a lens driving apparatus including a housing and a base assembly, the housing being provided on the base assembly and forming a receiving space with the base assembly, the lens driving apparatus further including: an anti-shake frame; the lens support body is arranged on one side of the anti-shake frame far away from the base component, and at least one part of the lens support body is arranged in the anti-shake frame; the circuit connecting assembly is respectively connected with the anti-shake frame, the lens supporting body and the base assembly; the driving magnet assembly is arranged on the anti-shake frame; the first driving coil component is arranged on the lens support body corresponding to the driving magnet component; the second driving coil component is arranged on the base component corresponding to the driving magnet component; and the sliding shaft is arranged on the inner side wall of the anti-shake frame, the lens support body is in butt joint with the sliding shaft, and the axial direction of the sliding shaft is parallel to the Z axis.
Further, the sliding shafts are at least two, the two sliding shafts are arranged on a group of opposite angles of the anti-shake frame, and the lens supporting body is respectively abutted with the two sliding shafts.
Further, the lens driving device further comprises two first magnetic conductive sheets, the two first magnetic conductive sheets correspond to a group of mutually parallel side edges of the anti-shake frame and are arranged on the lens supporting body, and the two first magnetic conductive sheets simultaneously correspond to one end of the side edge of the anti-shake frame, which is close to the sliding shaft, or simultaneously correspond to one end of the side edge of the anti-shake frame, which is far away from the sliding shaft.
Further, the anti-shake frame is provided with first mounting grooves respectively corresponding to the two sliding shafts, at least one part of the sliding shafts is located in the first mounting grooves, at least one other part of the sliding shafts is located outside the first mounting grooves, the lens support body is provided with second mounting grooves corresponding to one of the first mounting grooves and is provided with an abutting surface corresponding to the other first mounting groove.
Further, the driving magnet assembly comprises a first magnet group and a second magnet group, the first magnet group and the second magnet group are respectively arranged on two opposite sides of the anti-shake frame, and the two first magnetic conduction sheets are opposite to the two magnets of the first magnet group or the two magnets of the second magnet group.
Further, the circuit connection assembly includes: the four connecting pieces are respectively connected with the lens supporting body, the anti-shake frame and the base component, and the four connecting pieces are respectively connected with four corners of the base component; the position detection piece is arranged on the lens support body, and the connecting piece is electrically connected with the position detection piece; the sensing piece is arranged on the base component corresponding to the position detection piece; and the electric conducting piece is arranged on the lens supporting body and is electrically connected with the position detecting piece and the first driving coil assembly respectively.
Further, the connecting piece includes conducting segment and the fixed section of connecting in order, and conducting segment keeps away from the one end setting of fixed section and is connected on the lens supporter and with the position detection piece electricity, and conducting segment and the one end setting of fixed section interconnect are on anti-shake frame, and the one end setting of conducting segment is kept away from to the fixed section is on the base subassembly and is connected with the base subassembly electricity.
Further, at least the fixed section of the connecting piece is provided with a bending part, and the base component is provided with a clearance groove corresponding to the bending part.
Further, the base assembly includes: the shell is covered on the base body; and the FPC board is arranged around the circumference of the base body, the second driving coil assembly is arranged on the FPC board, and the connecting piece is electrically connected with the FPC board.
Further, the base assembly further comprises two position sensors, wherein the two position sensors are arranged on the FPC board corresponding to two adjacent side edges of the base body.
Further, the FPC board has a plurality of solder joints, each of the connectors being soldered to at least one different solder joint.
Further, the lens driving device further includes a plurality of balls disposed between the base assembly and the anti-shake frame.
Further, the base assembly is provided with rolling grooves or shims corresponding to the balls.
Further, the base assembly further comprises a plurality of second magnetic conduction sheets, and the second magnetic conduction sheets are arranged on the base body of the base assembly corresponding to the driving magnet assembly.
Further, the lens driving device further includes a plurality of sliders disposed between the base assembly and the anti-shake frame.
Further, the base component and the anti-shake frame are respectively provided with a plurality of sliding grooves corresponding to the sliding blocks.
Further, the plurality of sliding grooves comprise a plurality of first sliding grooves and a plurality of second sliding grooves, the first sliding grooves of the base assembly correspond to the second sliding grooves of the anti-shake frame, the second sliding grooves of the base assembly correspond to the first sliding grooves of the anti-shake frame, the extending direction of the second sliding grooves of the base assembly are perpendicular to the extending direction of the first sliding grooves of the anti-shake frame, at least one part of the sliding blocks is arranged in the first sliding grooves, and at least one other part of the sliding blocks is arranged in the second sliding grooves opposite to the first sliding grooves.
Specifically, the slider includes a sliding portion and a limiting portion. The sliding part is abutted with the first chute, and one side of the limiting part facing the first chute is provided with at least one sliding curved surface; the limiting part is arranged on one side, far away from the first sliding groove, of the sliding part, and the limiting part is positioned in the second sliding groove and can move along the extending direction of the second sliding groove.
In this embodiment, the first sliding groove and the second sliding groove are V-shaped grooves, and the second sliding groove of the anti-shake frame extends along the X-axis direction, and the first sliding groove of the base assembly extends along the Y-axis direction. When the anti-shake frame moves along the X-axis direction, the anti-shake frame moves relative to all the sliding blocks, and the second sliding groove of the anti-shake frame moves relative to the sliding blocks. When the anti-shake frame moves along the Y-axis direction, the anti-shake frame drives all the sliding blocks to move relative to the base assembly, and at the moment, the part of the sliding blocks positioned in the first sliding groove of the base assembly can move relative to the first sliding groove of the base assembly. That is, in the present application, the first and second sliding grooves are provided as V-grooves, and the movement of the slider is limited by the V-grooves, thereby limiting the movement direction and distance of the anti-shake frame.
Alternatively, the limiting portion is hemispherical or semi-cylindrical.
According to another aspect of the present invention, there is provided an image capturing module including the lens driving device described above.
According to another aspect of the present invention, there is provided a mobile terminal including the camera module set described in the claims.
By applying the technical scheme of the application, the lens driving device comprises a shell and a base component, wherein the shell is covered on the base component and forms a containing space with the base component, and the lens driving device also comprises an anti-shake frame, a lens supporting body, a circuit connecting component, a driving magnet component, a first driving coil component, a second driving coil component and a sliding shaft, wherein the anti-shake frame, the lens supporting body, the circuit connecting component, the driving magnet component, the first driving coil component, the second driving coil component and the sliding shaft are arranged in the containing space. The lens support body is arranged on one side of the anti-shake frame far away from the base component, and at least one part of the lens support body is arranged in the anti-shake frame; the circuit connecting component is respectively connected with the anti-shake frame, the lens supporting body and the base component; the driving magnet assembly is arranged on the anti-shake frame; the first driving coil component is arranged on the lens support body corresponding to the driving magnet component; the second driving coil component is arranged on the base component corresponding to the driving magnet component; the sliding shaft is arranged on the inner side wall of the anti-shake frame, the lens supporting body is in butt joint with the sliding shaft, and the axial direction of the sliding shaft is parallel to the Z axis.
When the lens driving device is used, the lens supporting body can move along the Z axis relative to the anti-shake frame through the mutual matching of the first driving coil component and the driving magnet component, so that the AF driving effect on the lens is achieved. And through the mutual cooperation of the second driving coil component and the driving magnet component, the anti-shake frame can move in the XY plane relative to the base component, and the anti-shake frame can drive the lens supporting body to move together in the moving process of the anti-shake frame, so that the anti-shake driving of the lens is realized. In addition, the lens driving device also has the sliding shaft, so that the sliding shaft can play a role in guiding the movement of the lens supporting body in the process of moving the lens supporting body relative to the anti-shake frame, and the stability of the movement of the lens supporting body is further ensured. Further, since the lens driving apparatus of the present application further includes the circuit connection assembly, the electrical conduction of the first driving coil assembly can be ensured by the circuit connection assembly. Therefore, compared with the lens driving device in the prior art, the lens driving device does not need to design the upper and lower spring plates, so that the assembly process of the lens driving device is simplified, and the stability of the lens supporting body in the moving process is improved. Therefore, the lens driving device solves the problem of poor usability of the lens driving device in the prior art.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application. In the drawings:
FIG. 1 illustrates an exploded view of a lens driving apparatus according to one embodiment of the present invention;
Fig. 2 is a schematic view showing an internal structure of the lens driving apparatus of fig. 1;
FIG. 3 is a schematic diagram showing the positional relationship among the base assembly, the anti-shake frame, the lens support, and the circuit connection assembly of the lens driving apparatus of FIG. 1;
FIG. 4 shows an exploded view of the base assembly, anti-shake frame, and circuit connection assembly of the lens driving apparatus of FIG. 1;
Fig. 5 is a schematic diagram showing the positional relationship between an anti-shake frame and balls of a lens driving apparatus according to an embodiment of the application;
FIG. 6 shows a schematic diagram of the circuit connection assembly of the lens driving apparatus of FIG. 1;
FIG. 7 is a schematic view showing the structure of a slider of a lens driving apparatus in one embodiment of the present application;
FIG. 8 shows a schematic view of another angle of the slider of FIG. 7;
FIG. 9 is a schematic view showing the structure of a slider of a lens driving apparatus in another embodiment of the present application;
FIG. 10 shows a schematic view of another angle of the slider of FIG. 9;
FIG. 11 is a schematic view showing the structure of the sliding portion and the limiting portion of the slider according to the present application when the structures are identical;
FIG. 12 is a schematic view showing the structure of a base body of a lens driving apparatus according to an embodiment of the present application;
FIG. 13 is a schematic diagram showing the positional relationship among an anti-shake frame, a driving magnet assembly, and a slider according to an embodiment of the application;
fig. 14 is a schematic view showing the structure of an anti-shake frame of a lens driving apparatus according to an embodiment of the application.
Wherein the above figures include the following reference numerals:
10. A housing; 20. a base assembly; 21. a clearance groove; 22. a base body; 23. an FPC board; 231. welding spots; 24. a position sensor; 30. an anti-shake frame; 31. a first mounting groove; 40. a lens support; 41. a second mounting groove; 42. an abutment surface; 43. a limit boss; 50. a circuit connection assembly; 51. a connecting piece; 511. a conductive segment; 512. a fixed section; 5121. a bending portion; 52. a position detecting member; 53. an electrical conduction member; 54. an induction member; 60. driving the magnet assembly; 61. a first magnet group; 62. a second magnet group; 70. a first driving coil assembly; 80. a second driving coil assembly; 90. a slide shaft; 100. a first magnetic conductive sheet; 200. a ball; 300. a second magnetic conductive sheet; 400. a slide block; 410. a sliding part; 411. a sliding curved surface; 420. a limit part; 500. a first chute; 600. and a second chute.
Detailed Description
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application will be described in detail below with reference to the drawings in connection with embodiments.
It is noted that all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs unless otherwise indicated.
In the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the component itself in the vertical, upright or gravitational direction; also, for ease of understanding and description, "inner and outer" refers to inner and outer relative to the profile of each component itself, but the above-mentioned orientation terms are not intended to limit the present invention.
In order to solve the problem of poor usability of a lens driving device in the prior art, the application provides a lens driving device, an image pickup module and a mobile terminal.
The mobile terminal in the application can be a mobile phone, a notebook computer and other equipment with a camera shooting function. The camera module of the application is provided with a lens driving device as follows, and the mobile terminal of the application is provided with the camera module.
As shown in fig. 1 to 14, the lens driving device of the present application includes a housing 10 and a base assembly 20, wherein the housing 10 is covered on the base assembly 20 and forms a receiving space with the base assembly 20, and the lens driving device further includes an anti-shake frame 30, a lens support 40, a circuit connection assembly 50, a driving magnet assembly 60, a first driving coil assembly 70, a second driving coil assembly 80, and a slide shaft 90 disposed in the receiving space. The lens support 40 is disposed at a side of the anti-shake frame 30 away from the base assembly 20, and at least a portion of the lens support 40 is disposed inside the anti-shake frame 30; the circuit connection assembly 50 is connected with the anti-shake frame 30, the lens support 40 and the base assembly 20, respectively; the driving magnet assembly 60 is disposed on the anti-shake frame 30; the first driving coil assembly 70 is disposed on the lens support body 40 corresponding to the driving magnet assembly 60; the second driving coil assembly 80 is disposed on the base assembly 20 corresponding to the driving magnet assembly 60; the slide shaft 90 is disposed on an inner sidewall of the anti-shake frame 30, the lens support 40 is abutted against the slide shaft 90, and an axial direction of the slide shaft 90 is parallel to the Z axis.
When the lens driving device is used, the lens supporting body 40 can move along the Z axis relative to the anti-shake frame 30 through the mutual matching of the first driving coil assembly 70 and the driving magnet assembly 60, so that the AF driving effect on the lens is achieved. The anti-shake frame 30 can move in the XY plane relative to the base assembly 20 through the mutual cooperation of the second driving coil assembly 80 and the driving magnet assembly 60, and the anti-shake frame 30 can drive the lens support body 40 to move together in the process of moving the anti-shake frame 30, so that the anti-shake driving of the lens is realized. In addition, since the lens driving device of the present application further has the sliding shaft 90, the movement of the lens supporting body 40 can be guided by the sliding shaft 90 during the movement of the lens supporting body 40 relative to the anti-shake frame 30, thereby ensuring the stability of the movement of the lens supporting body 40. Also, since the lens driving apparatus of the present application further includes the circuit connection assembly 50, the electrical conduction and the closed loop control of the first driving coil assembly 70 can be ensured by the circuit connection assembly 50. Therefore, the lens driving device of the present application does not need to design the upper and lower spring plates as compared with the lens driving device of the prior art, thereby simplifying the assembly process of the lens driving device and improving the stability of the lens supporting body 40 during the movement. Therefore, the lens driving device solves the problem of poor usability of the lens driving device in the prior art.
Optionally, there are at least two slide shafts 90. In one embodiment of the present application, there are two slide shafts 90, and the two slide shafts 90 are disposed on a set of diagonal corners of the anti-shake frame 30, and the lens support body 40 is respectively abutted with the two slide shafts 90. Meanwhile, the lens driving device further comprises two first magnetic conductive sheets 100, wherein the two first magnetic conductive sheets 100 are arranged on the lens supporting body 40 corresponding to a group of mutually parallel sides of the anti-shake frame 30, and the two first magnetic conductive sheets 100 are arranged at one end, close to the sliding shaft 90, of the side of the anti-shake frame 30 or at one end, far from the sliding shaft 90, of the side of the anti-shake frame 30. Or an included angle greater than 0 degrees is formed between the connecting line of the two first magnetic conductive sheets 100 and the connecting line of the side edges of the two anti-shake frames 30 corresponding to the two first magnetic conductive sheets 100.
Of course, the number of the slide shaft 90 and the first magnetic sheet 100 in the present application is not limited to two, and the number of the slide shaft 90 or the first magnetic sheet 100 may be increased according to actual use requirements. The purpose of arranging the number of the slide shaft 90 and the first magnetic conductive sheet 100 in two in the present application is to reduce the overall weight and driving resistance of the lens driving device as low as possible while securing the stress stability of the lens supporting body 40, thereby reducing the power consumption of the lens driving device.
In the present application, the first magnetic sheet 100 may be provided on the outer side wall of the lens support 40 or may be embedded in the lens support 40. When the first magnetic conductive sheet 100 is embedded in the lens supporting body 40, the internal structure of the lens driving device can be more compact, which is more beneficial to the miniaturization design of the lens driving device. In the present application, a limiting boss 43 may be disposed on a side of the lens support body 40 away from the base, so that the movement distance of the lens support body 40 is limited by the limiting boss during the movement of the lens support body 40 relative to the anti-shake frame 30.
In one embodiment of the present application, the anti-shake frame 30 has a quadrilateral shape. Of course, the anti-shake frame 30 may be designed into other polygonal shapes according to practical use situations, and the positions of the first magnetic conductive sheet 100 and the sliding shaft 90 need to be changed at this time, so as to ensure that the lens support body 40 abuts against the sliding shaft 90 under the interaction of the first magnetic conductive sheet 100 and the driving magnet assembly 60. Also, in the present embodiment, the distances from the two first magnetic conductive sheets 100 to the center of the lens support body 40 are equal, or the two first magnetic conductive sheets 100 are disposed symmetrically about the center of the lens support body 40.
Therefore, the first magnetic sheet 100 is provided in the present application to enable the first magnetic sheet 100 to interact with the driving magnet assembly 60, and further enable the lens support body 40 to abut against the slide shaft 90 under the acting force of the first magnetic sheet 100 and the driving magnet assembly 60, so as to realize the guiding function of the movement of the slide shaft 90 to the lens support body 40.
In order to ensure that the slide shafts 90 are not displaced relatively inside the lens driving device, the anti-shake frame 30 is provided with first mounting grooves 31 corresponding to the two slide shafts 90, respectively, at least one portion of the slide shafts 90 is located inside the first mounting grooves 31, at least another portion of the slide shafts 90 is located outside the first mounting grooves 31, the lens support body 40 is provided with second mounting grooves 41 corresponding to one of the first mounting grooves 31, and an abutment surface 42 corresponding to the other first mounting groove 31. That is, in the present embodiment, one of the slide shafts 90 is accommodated in the space formed by the first mounting groove 31 and the second mounting groove 41, and only a part of the other slide shaft 90 is positioned in the first mounting groove 31 and abuts against the abutment surface 42, which is provided for the purpose of preventing the slide shaft 90, the lens support body 40, and the anti-shake frame 30 from being jammed due to assembly accuracy when the lens support body 40 moves along the Z-axis relative to the anti-shake frame 30. Thereby effectively ensuring that the lens support body 40 can move more smoothly.
In the present application, the inner wall surface of the first mounting groove 31 is semicircular, so that the first mounting groove can be tightly attached to the sliding shaft 90, and the second mounting groove 41 is U-shaped or V-shaped, so that the surface of the sliding shaft 90 located in the second mounting groove 41 is not fully attached to the second mounting groove 41, thereby further ensuring the smoothness of the movement of the lens support body 40.
Specifically, the driving magnet assembly 60 includes a first magnet set 61 and a second magnet set 62, where the first magnet set 61 and the second magnet set 62 are disposed on two opposite sides of the anti-shake frame 30, and two first magnetic conductive sheets 100 are disposed opposite to two magnets of the first magnet set 61 or two magnets of the second magnet set 62.
Specifically, the circuit connection assembly 50 includes a connection member 51, a position detecting member 52, an induction member 54, and an electrical conduction member 53. The four connecting pieces 51 are respectively connected with the lens supporting body 40, the anti-shake frame 30 and the base assembly 20, and the four connecting pieces 51 are respectively connected with four corners of the base assembly 20; the position detecting member 52 is provided on the lens support body 40, and the connecting member 51 is electrically connected to the position detecting member 52; the sensing member corresponding position detecting member 52 is disposed on the base assembly 20; the electrical conduction member 53 is provided on the lens support body 40 and is electrically connected to the position detection member 52 and the first driving coil assembly 70, respectively. And, the connection member 51 includes a conductive section 511 and a fixed section 512 connected in sequence, one end of the conductive section 511 away from the fixed section 512 is disposed on the lens support body 40 and electrically connected with the position detecting member 52, one end of the conductive section 511 and the fixed section 512 connected to each other is disposed on the anti-shake frame 30, and one end of the fixed section 512 away from the conductive section 511 is disposed on the base assembly 20 and electrically connected with the base assembly 20. Preferably, at least the fixing section 512 of the connecting member 51 has a bending portion 5121, and the base assembly 20 is provided with a clearance groove 21 corresponding to the bending portion 5121.
In a specific embodiment of the present application, the position detecting member 52 includes a hall chip and a capacitor, and the four connecting members 51 are respectively connected to the hall chip, and the sensing member 54 is a hall magnet, so that when the lens support body 40 moves along the Z-axis relative to the anti-shake frame 30, the current capacity of the first driving coil assembly 70 can be adjusted through the mutual induction of the hall chip and the hall magnet, and further, the movement of the lens support body 40 is adjusted, so as to realize the closed-loop control of the focusing driving. Also, the first driving coil assembly 70 is wound on the circumferential side wall of the lens support body 40 in the present embodiment, and the electrical conductive member 53 includes two reeds electrically connected to the two winding posts of the lens support body 40 and simultaneously electrically connected to the hall chip, respectively. Meanwhile, in the present application, the hall chip and the hall magnet are respectively disposed on the lens support body 40 and the base assembly 20 along the Z-axis direction, or the hall chip is located above the hall magnet in the Z-axis direction. The purpose of setting like this is in order to realize the crisscross setting of hall magnetite and drive magnetite subassembly 60 to guarantee that hall magnetite and drive magnetite subassembly 60 can not produce electromagnetic interference each other, closed-loop control precision is high, saves motor inner space simultaneously, does benefit to the miniaturized of structure. Of course, in the present application, the connecting member 51 is also a reed, so as to ensure that the connecting member 51 has a certain elasticity, so as to ensure the stability of the connection between the connecting member 51 and the lens support body 40, the anti-shake frame 30 and the base assembly 20 when the lens support body 40 moves along the Z axis relative to the anti-shake frame 30 or the anti-shake frame 30 drives the lens support body 40 to do anti-shake motion in the XY plane relative to the base assembly 20.
In the present application, the purpose of providing the bending portion 5121 at the fixing section 512 of the connection member 51 is to ensure that the bending portion 5121 can realize the anti-shake limit of the anti-shake frame 30 when the anti-shake frame 30 drives the lens support body 40 to perform the anti-shake motion, and at the same time, the bending portion 5121 can also play a role of resisting torque, so that the anti-shake frame 30 can only drive the lens support body 40 to perform the anti-shake motion within the preset range. In addition, in the present application, both ends of the conductive section 511 are respectively connected to the anti-shake frame 30 and the lens support 40, so that when the anti-shake frame 30 moves relative to the base assembly 20, the anti-shake frame 30 can drive the lens support 40 to move together under the action of the conductive section 511. Of course, if only from a motion standpoint, the anti-shake frame 30 can also move the lens support 40 together without the presence of the conductive segments 511.
Specifically, the mount assembly 20 includes a mount body 22 and an FPC board 23. The shell 10 is covered on the base body 22; the FPC board 23 is disposed around the circumference of the chassis body 22, the second driving coil assembly 80 is disposed on the FPC board 23, and the connection member 51 is electrically connected with the FPC board 23. In order to reduce the overall weight of the lens driving device and to achieve a compact design of the lens driving device, mounting openings are provided in the circumferential side wall of the anti-shake frame 30, respectively, for magnets that drive the magnet assembly 60.
Optionally, the base assembly 20 further includes two position sensors 24, where two position sensors 24 are disposed on the FPC board 23 corresponding to two adjacent sides of the base body 22. Also, the position sensor 24 may be a hall chip in the present application. Of course, an AF and OIS motion control chip may also be provided on the FPC board 23 in the present application.
Preferably, the FPC board 23 has a plurality of solder joints 231, each of the connectors 51 being soldered to at least one different solder joint 231. By this arrangement, the connection between the connection member 51 and the FPC board 23 can be made more stable, thereby effectively securing the usability of the lens driving apparatus.
In one embodiment of the present application, the lens driving apparatus further includes a plurality of balls 200, and the balls 200 are disposed between the base assembly 20 and the anti-shake frame 30. And, the base assembly 20 is provided with rolling grooves or shims corresponding to the balls 200. Meanwhile, the base assembly 20 further includes a plurality of second magnetic conductive sheets 300, and the second magnetic conductive sheets 300 are disposed on the base body 22 corresponding to the driving magnet assembly 60. The second magnetic sheet 300 is provided in the present embodiment in order to enable the anti-shake frame 30 to abut against the balls 200 by the action of the second magnetic sheet 300 and the driving magnet assembly 60, thereby ensuring the usability of the lens driving apparatus.
Unlike the above embodiment in which the balls 200 are provided, the lens driving apparatus further includes a plurality of sliders 400 in another embodiment of the present application, the sliders 400 being provided between the base assembly 20 and the anti-shake frame 30. And, the base assembly 20 and the anti-shake frame 30 are respectively provided with a plurality of sliding grooves corresponding to the sliding blocks 400.
Specifically, the plurality of sliding grooves includes a plurality of first sliding grooves 500 and a plurality of second sliding grooves 600, the first sliding grooves 500 of the base assembly 20 correspond to the second sliding grooves 600 of the anti-shake frame 30, the second sliding grooves 600 of the base assembly 20 correspond to the first sliding grooves 500 of the anti-shake frame 30, the second sliding grooves 600 of the base assembly 20 extend in directions perpendicular to the first sliding grooves 500 and the second sliding grooves 600 of the anti-shake frame 30, at least a portion of the sliding blocks 400 are disposed in the first sliding grooves 500, and at least another portion of the sliding blocks 400 are disposed in the second sliding grooves 600 opposite to the first sliding grooves 500.
Optionally, the slider 400 includes a sliding portion 410 and a limiting portion 420, the sliding portion 410 abuts against the first sliding chute 500, and a side of the sliding portion 410 facing the first sliding chute 500 has at least one sliding curved surface 411; the limiting portion 420 is disposed at a side of the sliding portion 410 away from the first sliding groove 500, and the limiting portion 420 is located inside the second sliding groove 600 and is capable of moving along the extending direction of the second sliding groove 600.
It should be noted that, in the present application, the first sliding groove 500 and the second sliding groove 600 are V-shaped grooves, and the second sliding groove 600 of the anti-shake frame 30 extends along the X-axis direction, while the first sliding groove 500 of the base assembly 20 extends along the Y-axis direction. Therefore, in the process of moving the anti-shake frame 30 relative to the base assembly 20, the movement direction and distance of the anti-shake frame 30 can be limited by the cooperation of the first sliding chute 500, the second sliding chute 600 and the sliding block 400. At this time, when the anti-shake frame 30 moves along the X-axis direction, the anti-shake frame 30 moves relative to all the sliders 400, and when the anti-shake frame 30 moves along the Y-axis direction, the anti-shake frame 30 drives the sliders 400 to move relative to the base assembly 20. That is, when the anti-shake frame 30 moves in the X-axis direction, the movement of the anti-shake frame 30 can be limited by the second sliding groove 600 and the slider 400 of the anti-shake frame 30. When the anti-shake frame 30 moves along the Y-axis direction, the movement of the anti-shake frame 30 can be limited by the first sliding groove 500 and the sliding block 400 of the base assembly 20. While the first chute 500 may also be a planar slot in the present embodiment, and in order to secure the movement stability of the anti-shake frame 30, the circumferential side wall of the first chute 500 may be provided as a slope.
Alternatively, the stopper 420 has a hemispherical or semi-cylindrical shape. And, when the limiting part 420 is hemispherical, a mounting platform is further provided at a position where the limiting part 420 is connected with the sliding part 410, and the limiting part 420 is mounted on the mounting platform.
Preferably, when the limit part 420 has a hemispherical shape, a side of the sliding part 410 contacting the first sliding groove 500 has four sliding curved surfaces 411, the four sliding curved surfaces 411 are disposed at four corners of the sliding part 410, and the sliding curved surfaces 411 may be hemispherical, and at this time, the sliding block 400 may be in point contact with the sliding groove. When the limiting portion 420 is semi-cylindrical, the cross section of the limiting portion 420 is semi-circular, the sliding curved surface 411 of the sliding portion 410 is wavy, and the wavy shape is formed by two semi-cylinders. In this case, the sliding block 400 may be in line contact with the sliding groove. Of course, in the present application, there may be both point contact and line contact between the slider 400 and the chute, and the point contact friction is small, and the stability of line contact sliding and limiting is better.
It should be added that, in the present application, when the first sliding groove and the second sliding groove are both V-grooves, the structures of the limiting portion and the sliding portion may be the same, for example, both have a semi-cylindrical shape, and the limiting portion and the sliding portion are disposed in a crisscross arrangement. The first sliding groove and the second sliding groove which are respectively positioned on the anti-shake frame and the base and are oppositely arranged are also arranged in a crossing way. In this embodiment, the shape of the first chute may be adaptively adjusted according to the shape of the sliding portion, or the specific shape of the first chute and the specific shape of the sliding portion may be matched with each other. As long as the sliding part can slide along the first sliding groove.
In the present application, when the bottom surface of the anti-shake frame is quadrangular, the number of the sliding blocks is four, at this time, two sliding blocks located on one diagonal line may be replaced by two sliding columns, and the sliding columns may be integrally formed with the anti-shake frame. And at this time, the sliding part and the limiting part of the sliding block are identical in shape and are semi-cylindrical and crisscross. The first sliding groove and the second sliding groove corresponding to the sliding block are V-shaped grooves, and the groove of the base corresponding to the sliding column can be a plane groove.
In addition, in this embodiment, the second magnetic conductive sheet 300 may be disposed, and the specific disposition position is the same as that of the second magnetic conductive sheet 300 in the above embodiment, so that the description is omitted. Also, when the lens driving apparatus of the present application uses the structure of the slider 400 and the slide groove, it is no longer necessary to provide the bent portion 5121 at the fixing section 512 of the connection member 51.
In this embodiment, by arranging the sliding groove and the sliding block 400, not only the friction force between the anti-shake frame 30 and the base assembly 20 is reduced, but also the movement of the anti-shake frame 30 in the XY plane can be limited, so that the lens driving device of the present application does not need to additionally arrange other limiting structures for anti-shake movement, and the internal structure of the lens driving device is simplified.
From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:
1. the problem of poor usability of the lens driving device in the prior art is effectively solved;
2. Simple structure, stable performance.
It will be apparent that the embodiments described above are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the application described herein may be implemented in sequences other than those illustrated or otherwise described herein.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (18)
1. The utility model provides a lens drive arrangement, its characterized in that includes shell (10) and base subassembly (20), shell (10) cover is established on base subassembly (20) and with base subassembly (20) form the accommodation space, lens drive arrangement is still including setting up in the accommodation space:
An anti-shake frame (30);
A lens support body (40), the lens support body (40) being disposed at a side of the anti-shake frame (30) away from the base assembly (20), and at least a portion of the lens support body (40) being disposed inside the anti-shake frame (30);
a circuit connection assembly (50), the circuit connection assembly (50) being connected to the anti-shake frame (30), the lens support (40), and the base assembly (20), respectively;
A driving magnet assembly (60), the driving magnet assembly (60) being disposed on the anti-shake frame (30);
a first driving coil assembly (70), wherein the first driving coil assembly (70) is arranged on the lens support body (40) corresponding to the driving magnet assembly (60);
a second driving coil assembly (80), wherein the second driving coil assembly (80) is arranged on the base assembly (20) corresponding to the driving magnet assembly (60);
A slide shaft (90), wherein the slide shaft (90) is arranged on the inner side wall of the anti-shake frame (30), the lens support body (40) is abutted with the slide shaft (90), and the axial direction of the slide shaft (90) is parallel to the Z axis;
The number of the sliding shafts (90) is at least two, the two sliding shafts (90) are arranged on a group of opposite angles of the anti-shake frame (30), and the lens supporting body (40) is respectively abutted with the two sliding shafts (90);
the lens driving device further comprises two first magnetic conductive sheets (100), wherein the two first magnetic conductive sheets (100) are arranged on the lens supporting body (40) corresponding to a group of mutually parallel side edges of the anti-shake frame (30), and the two first magnetic conductive sheets (100) are simultaneously arranged corresponding to one end of the side edge of the anti-shake frame (30) close to the sliding shaft (90) or simultaneously arranged corresponding to one end of the side edge of the anti-shake frame (30) far away from the sliding shaft (90);
The anti-shake frame (30) is provided with first mounting grooves (31) corresponding to two sliding shafts (90) respectively, at least one part of each sliding shaft (90) is located inside each first mounting groove (31), at least one other part of each sliding shaft (90) is located outside each first mounting groove (31), and the lens supporting body (40) is provided with a second mounting groove (41) corresponding to one first mounting groove (31) and is provided with a butt surface (42) corresponding to the other first mounting groove (31).
2. The lens driving device according to claim 1, wherein the driving magnet assembly (60) includes a first magnet group (61) and a second magnet group (62), the first magnet group (61) and the second magnet group (62) being disposed on two oppositely disposed sides of the anti-shake frame (30), respectively, two of the first magnetic conductive sheets (100) being disposed opposite to two magnets of the first magnet group (61) or two magnets of the second magnet group (62).
3. The lens driving device according to claim 1, wherein the circuit connection assembly (50) includes:
The four connecting pieces (51), the four connecting pieces (51) are respectively connected with the lens supporting body (40), the anti-shake frame (30) and the base assembly (20), and the four connecting pieces (51) are respectively connected with four corners of the base assembly (20);
A position detecting member (52), the position detecting member (52) being provided on the lens support body (40), and the connecting member (51) being electrically connected to the position detecting member (52);
the sensing piece (54) is arranged on the base assembly (20) corresponding to the position detection piece (52);
and an electrical conduction member (53), wherein the electrical conduction member (53) is arranged on the lens support body (40) and is electrically connected with the position detection member (52) and the first driving coil assembly (70), respectively.
4. A lens driving device according to claim 3, wherein the connecting member (51) comprises a conductive section (511) and a fixed section (512) which are sequentially connected, one end of the conductive section (511) away from the fixed section (512) is disposed on the lens supporting body (40) and electrically connected with the position detecting member (52), one end of the conductive section (511) and one end of the fixed section (512) which are mutually connected are disposed on the anti-shake frame (30), and one end of the fixed section (512) away from the conductive section (511) is disposed on the base assembly (20) and electrically connected with the base assembly (20).
5. Lens driving device according to claim 4, characterized in that at least the fixing section (512) of the connecting piece (51) has a bent portion (5121), and the base assembly (20) is provided with a clearance groove (21) corresponding to the bent portion (5121).
6. A lens driving device according to claim 3, wherein the base assembly (20) comprises:
A base body (22), wherein the shell (10) is covered on the base body (22);
The FPC board (23), FPC board (23) are around the circumference setting of base body (22), second driving coil subassembly (80) set up on FPC board (23), just connecting piece (51) with FPC board (23) electricity is connected.
7. The lens driving device according to claim 6, wherein the base assembly (20) further comprises two position sensors (24), and two of the position sensors (24) are disposed on the FPC board (23) corresponding to two adjacent side edges of the base body (22).
8. Lens driving device according to claim 6, characterized in that the FPC board (23) has a plurality of solder joints (231), each of the connection members (51) being soldered to at least one different solder joint (231).
9. The lens driving device according to any one of claims 1 to 8, further comprising a plurality of balls (200), the balls (200) being disposed between the base assembly (20) and the anti-shake frame (30).
10. Lens driving device according to claim 9, characterized in that the base assembly (20) is provided with rolling grooves or shims in correspondence of the balls (200).
11. The lens driving device according to claim 9, wherein the base assembly (20) further comprises a plurality of second magnetic conductive sheets (300), and the second magnetic conductive sheets (300) are disposed on the base body (22) of the base assembly (20) corresponding to the driving magnet assembly (60).
12. The lens driving device according to any one of claims 1 to 8, further comprising a plurality of sliders (400), the sliders (400) being disposed between the base assembly (20) and the anti-shake frame (30).
13. The lens driving apparatus according to claim 12, wherein the base assembly (20) and the anti-shake frame (30) are provided with a plurality of sliding grooves, respectively, corresponding to the sliding blocks (400).
14. The lens driving apparatus according to claim 13, wherein a plurality of the slide grooves includes a plurality of first slide grooves (500) and a plurality of second slide grooves (600), the first slide grooves (500) of the base assembly (20) correspond to the second slide grooves (600) of the anti-shake frame (30), the second slide grooves (600) of the base assembly (20) correspond to the first slide grooves (500) of the anti-shake frame (30), an extending direction of the second slide grooves (600) of the base assembly (20) and an extending direction of the first slide grooves (500) of the anti-shake frame (30) are perpendicular to each other, at least a portion of the slider (400) is disposed within the first slide grooves (500), and at least another portion of the slider (400) is disposed within the second slide grooves (600) opposite to the first slide grooves (500).
15. The lens driving apparatus according to claim 14, wherein the slider (400) includes:
a sliding part (410), wherein the sliding part (410) is abutted with the first chute (500), and one side of the sliding part (410) facing the first chute (500) is provided with at least one sliding curved surface (411);
the limiting part (420), the limiting part (420) is arranged at one side of the sliding part (410) far away from the first sliding groove (500), and the limiting part (420) is positioned in the second sliding groove (600) and can move along the extending direction of the second sliding groove (600).
16. The lens driving apparatus according to claim 15, wherein the stopper portion (420) has a hemispherical shape or a semi-cylindrical shape.
17. An image pickup module comprising the lens driving apparatus according to any one of claims 1 to 16.
18. A mobile terminal comprising the camera module of claim 17.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310135353.1A CN116594142B (en) | 2023-02-17 | 2023-02-17 | Lens driving device, camera module and mobile terminal |
| PCT/CN2023/078323 WO2024168945A1 (en) | 2023-02-17 | 2023-02-27 | Lens driving device, camera module and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310135353.1A CN116594142B (en) | 2023-02-17 | 2023-02-17 | Lens driving device, camera module and mobile terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116594142A CN116594142A (en) | 2023-08-15 |
| CN116594142B true CN116594142B (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310135353.1A Active CN116594142B (en) | 2023-02-17 | 2023-02-17 | Lens driving device, camera module and mobile terminal |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN116594142B (en) |
| WO (1) | WO2024168945A1 (en) |
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Also Published As
| Publication number | Publication date |
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| WO2024168945A1 (en) | 2024-08-22 |
| CN116594142A (en) | 2023-08-15 |
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