CN118068510A - Lens driving device and image pickup device - Google Patents
Lens driving device and image pickup device Download PDFInfo
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- CN118068510A CN118068510A CN202410277441.XA CN202410277441A CN118068510A CN 118068510 A CN118068510 A CN 118068510A CN 202410277441 A CN202410277441 A CN 202410277441A CN 118068510 A CN118068510 A CN 118068510A
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- 238000003384 imaging method Methods 0.000 abstract description 4
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- 229910000639 Spring steel Inorganic materials 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
- G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
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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
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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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
The invention belongs to the technical field of focusing motors, and particularly relates to a lens driving device and an imaging device. It has solved the technical problem such as current direction card is dead. The lens driving device comprises a base; the telescopic lens barrel is used for bearing the lens; the guide post bracket is sleeved on the periphery of the telescopic lens barrel and is fixed on a corner upright post of the base; the guide posts are provided with a plurality of guide posts; one end of each guide post is fixed on the base, and the other end of each guide post is fixed on the guide post bracket; the shell is buckled on the base; the waterproof sealing gasket is annular; and the electromagnetic driving mechanism drives the telescopic lens barrel to axially focus on the optical axis. The invention has the advantages that: the service life is prolonged.
Description
Technical Field
The invention is a divisional application made for patent application number CN202111484328.1, patent application day 2021, 12 months and 7 days, and patent names are a lens driving device and an image pickup device. The invention belongs to the technical field of focusing motors, and particularly relates to a lens driving device and an imaging device.
Background
The camera device comprises a mobile phone and other terminals.
Taking a mobile phone as an example, in order to pursue the same image quality as that of a single lens reflex, a mobile phone camera adopts a large pixel and a large aperture on a miniature camera to improve the optical performance, so that the actual focal length of the miniature lens is increased. In the limited space of the mobile phone, in order to meet the requirements, the driving mechanism of the lens can stretch out and draw back the surface of the mobile phone when the miniature camera is in use. Therefore, the telescopic camera of the miniature lens barrel not only can solve the problems that a large pixel and a large aperture lens are arranged and used on a mobile phone, but also can greatly improve the image quality.
In order to improve the focusing movement precision, many inventors have designed a way to guide the lens barrel by using a guide post. For example, chinese patent discloses a camera module, patent application number: 201521128009.7, which comprises at least three guide rods arranged on the bracket, and a lens bearing seat slidably arranged on the at least three guide rods, wherein the lens bearing seat drives the lens module to slide along the at least three guide rods. The three guide rods play a role in fixing and guiding, prevent the lens module from tilting during focusing, and effectively prevent the lens module from moving in a plane perpendicular to the optical axis.
Although the above conventional scheme improves focusing accuracy, the above scheme has the following drawbacks: when the lens bearing seat moves on the optical axis relative to the bracket and repeatedly stretches out and retracts in the bracket, external pollutants easily enter the bracket to pollute the internal components of the module, and the service life is influenced.
Disclosure of Invention
The present invention has been made in view of the above problems, and an object of the present invention is to provide a lens driving device and an imaging device that can solve the above problems.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the lens driving device comprises a base;
The telescopic lens barrel is used for bearing the lens;
the guide post bracket is sleeved on the periphery of the telescopic lens barrel and is fixed on a corner upright post of the base;
The guide posts are provided with a plurality of guide posts; one end of each guide post is fixed on the base, and the other end of each guide post is fixed on the guide post bracket;
the shell is buckled on the base; the telescopic lens barrel can retract into a cavity formed by the enclosure and the base, or can extend out from the top of the enclosure;
A waterproof sealing gasket which is annular; the waterproof sealing gasket is sleeved at one end of the telescopic lens barrel, which is far away from the base, and is adhered to the inner top surface of the top of the shell;
And the electromagnetic driving mechanism drives the telescopic lens barrel to axially focus on the optical axis.
In the lens driving device, a reed is arranged between one end surface of the telescopic lens barrel, which is close to the base, and the base.
In the lens driving device, the lens driving device further comprises self-adaptive guide post elastic clamps, and the number of the self-adaptive guide post elastic clamps is equal to that of the guide posts; the self-adaptive guide column elastic clamps are fixed on the telescopic lens barrel, each guide column is sleeved with a self-adaptive guide column elastic clamp, and the guide columns force the self-adaptive guide column elastic clamps to elastically deform so that the axial lead of the self-adaptive guide column elastic clamps and the axial lead of the guide columns are always coincident;
In the lens driving device, a shoulder is arranged outside one end of the telescopic lens barrel, which is close to the base, and an avoidance through hole through which the guide posts penetrate one by one is arranged on the shoulder, and the self-adaptive guide post elastic clamp is positioned at an orifice of one end, which is far away from the base, of the avoidance through hole.
In the lens driving device, the self-adaptive guide pillar elastic clamp comprises a guide pillar clamping sleeve and an elastic arm connected to the outer wall of the guide pillar clamping sleeve, and one end of the elastic arm, which is far away from the guide pillar clamping sleeve, is fixed on the shoulder.
In the lens driving device, the number of the elastic arms is two, and the elastic arms are symmetrically distributed by the axial lead of the guide post jacket.
In the lens driving device, the convex shoulder is provided with the jacket avoiding groove which is used for avoiding the guide post jacket and is communicated with the avoiding through hole, the guide post jacket is arranged in the jacket avoiding groove, and a gap is reserved between the outer circumferential surface of the guide post jacket and the groove wall of the jacket avoiding groove.
In the lens driving device, the elastic arm avoidance groove for avoiding the elastic arm is formed in the shoulder, the elastic arm avoidance groove is communicated with the jacket avoidance groove, the elastic arm is arranged in the corresponding elastic arm avoidance groove, and the thickness of the elastic arm is smaller than the width of the elastic arm avoidance groove; the bottom of one side of the elastic arm avoiding groove far away from the jacket avoiding groove is provided with a fixing boss, and one end part of the elastic arm far away from the guide post jacket is fixed on the fixing boss.
In the lens driving device, the adaptive guide pillar elastic clamp is formed by combining two elastic plates.
In the lens driving device, the guide post jacket is any one of a circular jacket and a polygonal jacket.
In the lens driving device, a plurality of guide post avoidance through holes are formed in the base, one ends of the guide posts, far away from the guide post support, extend into the corresponding guide post avoidance through holes one by one, reinforcing members are fixedly embedded in the base, a plurality of guide post positioning holes which are communicated with the guide post avoidance through holes one by one are formed in the reinforcing members, positioning posts are arranged at one ends of the guide posts, which extend into the guide post avoidance through holes, the diameter of each positioning post is smaller than that of the guide post, the positioning posts are inserted into the guide post positioning holes and are fixedly connected with the guide posts, and one ends of the guide posts, which are provided with the positioning posts, are propped against the reinforcing members.
In the lens driving device, the guide post support is positioned between the waterproof sealing pad and the base.
In the lens driving device, the guide post support comprises a middle retaining ring and four cantilever plates connected to the periphery of the middle retaining ring, the suspension ends of the cantilever plates are fixed on the first steps of the corner upright posts one by one, four guide posts are arranged on the first steps, guide post end holes are respectively formed in the middle of each cantilever plate, and the upper ends of the guide posts are inserted into the guide post end holes one by one.
In the above lens driving device, the waterproof gasket comprises an outer annular fixing portion and an annular wavy portion connected to the inner side of the outer annular fixing portion, the outer annular fixing portion is fixed on the second step of the corner upright post one by one through four corner pieces, the outer annular fixing portion and the corner pieces are respectively attached to the inner top surface of the shell, and the annular wavy portion is sleeved on the outer wall of one end, far away from the base, of the telescopic lens barrel.
In the above lens driving device, the electromagnetic driving mechanism includes a coil wound around one end of the telescopic lens barrel near the base, at least two driving magnets distributed relatively are disposed on the base, the driving magnets are attached to the inner wall of the housing, and the driving magnets are distributed around the coil.
The invention also provides an image pickup device, which is provided with the lens driving device.
Compared with the prior art, the invention has the advantages that:
The axial lead of the self-adaptive guide post elastic clamp can be changed along with the axial lead of the guide post, so that the axial leads of the guide post and the guide post are always overlapped, the overlapping enables the focusing movement of the telescopic lens barrel to be smoother, the phenomena of blocking and the like are avoided, the focusing efficiency is improved, and the focusing precision is ensured.
The flexible circuit board is arranged on the telescopic lens barrel, and the driving magnet can be arranged to be 4 blocks at the moment so as to improve the focusing stroke and pushing weight of the lens.
The position sensor is designed on the telescopic lens barrel, and can further improve the detection precision so as to ensure the focusing precision and the final shooting definition.
The waterproof gasket can prevent external pollutants from entering the inside of the shell from a reserved gap between the telescopic lens barrel and the shell, so that the performance of the electromagnetic driving mechanism is reduced, the elasticity of the reed is reduced and the like.
Drawings
Fig. 1 is a schematic view of a three-dimensional angle structure of a lens driving device provided by the invention.
Fig. 2 is a schematic diagram of a lens driving device according to the present invention.
FIG. 3 is a schematic cross-sectional view of the structure of FIG. 2 taken along line A-A.
FIG. 4 is a schematic cross-sectional view of the structure taken along line B-B in FIG. 2.
Fig. 5 is an exploded view of a lens driving device according to the present invention.
Fig. 6 is a schematic view of another perspective exploded view of the lens driving device according to the present invention.
Fig. 7 is a schematic structural diagram of the telescopic lens barrel combined adaptive guide post elastic clip provided by the invention.
Fig. 8 is a schematic diagram of an explosion structure of the guide post and the self-adaptive guide post elastic clamp provided by the invention.
Fig. 9 is a schematic view of a telescopic lens barrel according to the present invention.
Fig. 10 is a schematic view of a structure of an insert inside a base provided by the present invention.
Fig. 11 is a schematic circuit structure provided by the present invention.
Fig. 12 is a schematic structural diagram of a second embodiment provided by the present invention.
In the drawing, a base 1, a corner post 10, a first step 100, a second step 101, a reinforcing member 11, a post positioning hole 110, a magnet positioning boss 12, a first embedded conductor 13, a second embedded conductor 14, an exposed contact conductor surface 15, a leaf spring outer corner fixing surface 16, a data transmission embedded conductor 17, an exposed contact surface 170, a telescopic barrel 2, a shoulder 20, a jacket avoidance groove 200, an elastic arm avoidance groove 201, a fixing boss 202, a avoidance through hole 21, a position sensor 22, a flexible circuit board 23, a post bracket 30, an intermediate retaining ring 300, a cantilever plate 301, a post end hole 302, a post 31, a positioning post 310, an adaptive post spring clip 32, a post jacket 320, an elastic arm 321, an electromagnetic driving mechanism 4, a coil 40, a driving magnet 41, a leaf spring 5, a first elastic leaf spring 50, a second elastic leaf spring 51, a housing 6, a waterproof gasket 7, an outer annular fixing portion magnet 70, an annular wavy portion 71, a avoidance groove 72, and a corner piece 73.
Detailed Description
The following are specific embodiments of the invention and the technical solutions of the invention will be further described with reference to the accompanying drawings, but the invention is not limited to these embodiments.
Example 1
The Z axis in this embodiment is the focusing optical axis.
As shown in fig. 1 to 4, the lens driving device of the present embodiment includes a base 1, a telescopic barrel 2, a guide column bracket 30, a guide column 31, an adaptive guide column elastic clip 32, an electromagnetic driving mechanism 4, a housing 6, and a waterproof gasket 7.
As shown in fig. 5-6, the four corners of the base 1 are respectively provided with corner upright posts 10, and the corner upright posts 10 are used for limiting the position of the shell 6 fastened on the base 1, so as to realize accurate fastening of the shell 6.
Preferably, a step is formed between the two outer vertical surfaces of the corner upright post 10 and the base 1, and when the two outer vertical surfaces are buckled, the inner wall of the shell 6 is attached to the two outer vertical surfaces, and after the two outer vertical surfaces are installed in place, the shell 6 is installed at the step position.
The telescopic lens barrel 2 is used for bearing a lens; as shown in fig. 7, the telescopic barrel 2 of the present embodiment includes an intermediate cylindrical body, and a shoulder 20 fixed to an outer wall of one end of the intermediate cylindrical body remote from the incident light, and an outer circumferential surface of the shoulder 20 is provided with a coil winding groove.
As shown in fig. 3 to 6, the guide post bracket 30 is sleeved on the periphery of the telescopic lens barrel 2 and fixed on the corner upright post 10 of the base 1; the fixing can adopt a mutually matched step structure mode so as to ensure accurate installation and positioning.
The guide posts 31 are several; one end of each guide post 31 is fixed on the base 1, and the other end of each guide post 31 is fixed on the guide post bracket 30; the action of the guide pillar bracket 30 makes one end of the guide pillar 31 far away from the base 1 fixed, so as to improve the fixing stability of the guide pillar 31, and meanwhile, the structure can make a plurality of guide pillars parallel to each other, so as to improve the operation precision.
Preferably, the four guide posts 31 of the present embodiment are uniformly distributed circumferentially, and this structure can ensure the uniformity of the center of gravity distribution of the telescopic lens barrel 2, so as to further improve the accuracy of focusing movement.
The number of the self-adaptive guide post elastic clamps 32 is equal to that of the guide posts 31; the self-adaptive guide column elastic clamps 32 are fixed on the telescopic lens barrel 2, each guide column 31 is sleeved with one self-adaptive guide column elastic clamp 32, and the guide columns 31 force the self-adaptive guide column elastic clamps 32 to elastically deform so that the axial leads of the self-adaptive guide column elastic clamps 32 and the axial leads of the guide columns 31 are always coincident;
The axial lead of the self-adaptive guide pillar elastic clamp 32 can be changed along with the axial lead of the guide pillar 31, so that the axial leads of the two can be always overlapped, the focusing movement of the telescopic lens barrel 2 is smoother due to the overlapping, the blocking phenomenon and the like are avoided, the focusing efficiency is improved, and the focusing precision is ensured.
The electromagnetic driving mechanism 4 drives the telescopic lens barrel 2 to perform focusing movement in the axial direction of the optical axis.
Next, a reed 5 is provided between an end surface of the telescopic barrel 2 near the base 1 and the base 1. The reed 5 plays a plurality of roles of power supply and elastic reset, so that the telescopic lens barrel 2 can be forced to be telescopic back into the mobile phone shell in the power-off state, and the use safety of the lens driving device is ensured.
As shown in fig. 5 to 9, a shoulder 20 is provided outside one end of the telescopic lens barrel 2 near the base 1, the telescopic lens barrel 2 and the shoulder 20 are integrally formed, the structural strength is high, and the production efficiency can be improved. The shoulder 20 is provided with avoidance through holes 21 for the guide posts 31 to penetrate one by one, and the self-adaptive guide post elastic clamp 32 is positioned at an orifice of one end of the avoidance through holes 21 far away from the base 1.
The avoidance through hole 21 formed in the shoulder 20 is used for avoiding the guide column 31 and fixing the self-adaptive guide column elastic clamp 32, so that the self-adaptive guide column elastic clamp 32 is fixed more stably and reliably, and the self-adaptive guide column elastic clamp 32 is prevented from falling off.
Specifically, as shown in fig. 7-9, the adaptive guide pillar spring clip 32 of the present embodiment includes a guide pillar clip 320 and a spring arm 321 connected to an outer wall of the guide pillar clip 320, wherein an end of the spring arm 321 away from the guide pillar clip 320 is fixed on the shoulder 20.
The elastic arm 321 deforms along with the change of the axial line of the guide post jacket 320, so that the axial lines of the guide post jacket 320 and the guide post 31 are always coincident, and the phenomena of motion jamming and the like are prevented.
Preferably, the elastic arms 321 of the present embodiment have two elastic arms and are symmetrically distributed along the axis of the guide pillar jacket 320. That is, the two elastic arms 321 are located on the same straight line, which is convenient for processing and manufacturing, and meanwhile, the guiding function of the guide post jacket 320 is more stable, so as to prolong the service life of the guide post jacket 320.
The shoulder 20 is provided with a jacket avoiding groove 200 which is used for avoiding the guide post jacket 320 and is communicated with the avoiding through hole 21, the jacket avoiding groove 200 can form avoiding for the position and angle change of the guide post jacket 320, the guide post jacket 320 can not reach the corresponding position and angle due to dryness prevention, and secondly, the groove bottom of the jacket avoiding groove 200 and one end of the guide post jacket 320 close to the groove bottom are reserved with avoiding gaps, namely, the guide post jacket 320 is in a suspended state, the guide post jacket 320 is arranged in the jacket avoiding groove 200, and gaps are reserved between the outer circumferential surface of the guide post jacket 320 and the groove wall of the jacket avoiding groove 200.
Further, an elastic arm avoidance groove 201 for avoiding an elastic arm 321 is formed in the shoulder 20, and the elastic arm avoidance groove 201 is communicated with the jacket avoidance groove 200, so that the elastic arm avoidance groove 201 is used for avoiding elastic deformation of the elastic arm 321, and the guide pillar jacket 320 reaches a corresponding position and angle.
The elastic arms 321 are placed in the corresponding elastic arm escape grooves 201 and the thickness of the elastic arms 321 is smaller than the width of the elastic arm escape grooves 201; for example, twisting of the elastic arm in its thickness direction, or swinging in the thickness direction, causes the guide post collet 320 to reach the corresponding position and angle.
A fixing boss 202 is arranged at the bottom of one side of the elastic arm avoidance groove 201, which is far away from the jacket avoidance groove 200, and one end part of the elastic arm 321, which is far away from the guide post jacket 320, is fixed on the fixing boss 202. Further, a fixing step matched with the fixing boss 202 is arranged at one end of the elastic arm 321 far away from the guide pillar jacket 320, so that the elastic arm 321 and the fixing boss 202 are fixed, and of course, glue can be added at the position to enable the fixing boss 202 and the fixing step to be stably fixed together, and falling and the like are prevented.
Preferably, the adaptive guide post spring clip 32 of the present embodiment is formed from a combination of two resilient plates. Namely, the two elastic plates are respectively formed and then combined, and the combination mode is welding or gluing connection.
The resilient sheet material is a metal strip, for example, spring steel strip, or the like.
The middle part of the preformed elastic plate is provided with a bending section and straight line sections connected to two ends of the bending section, the straight line sections of the two elastic plates are mutually fixed, so that a space for the guide post to slide is formed by surrounding the two bending sections, the space can be square or round, and of course, other shapes of flat schemes can be provided, and the embodiment is not exhaustive.
Further, the guide post jacket 320 in this embodiment is any one of a circular jacket and a polygonal jacket. Polygonal jackets such as: diamond and square.
When a slight non-parallel condition occurs in the guide posts, the guide post jacket 320 is elastically slightly adjusted to avoid the blocking phenomenon when the guide posts slide.
As shown in fig. 5-6, a plurality of guide post avoidance through holes 19 are provided on the base 1, one end of the guide post 31 away from the guide post support 30 extends into the corresponding guide post avoidance through hole 19 one by one, the guide post avoidance through hole 19 is used for insertion and avoidance of the guide post, so that the guide post is fixed at a set central position, and of course, in order to further fix the guide post 31, glue can be provided between the guide post 31 and the guide post avoidance through hole 19. The reinforcing member 11 is embedded in the base 1, the reinforcing member 11 is in an annular frame shape and is made of a metal plate, the base 1 is injection molded, the reinforcing member 11 is embedded in the base 1, the reinforcing member 11 can strengthen the base structure, meanwhile, the reinforcing member 11 can also fix the guide posts in a datum way, so that the parallelism of the guide posts is very good, furthermore, the reinforcing member 11 is provided with a plurality of guide post positioning holes 110 which are communicated with the guide post avoidance holes 19 one by one, during injection molding, the reinforcing member 11 provided with the guide post positioning holes 110 is fixed in the set position of an injection mold in advance, of course, the guide post positioning holes 110 can be used as a datum mark for the fixation of the reinforcing member 11 in advance, for example, the guide post positioning holes 110 are inserted in the guide post positioning holes 110 in the injection mold in a positioning way, after mold closing, the guide post positioning holes 110 can be reserved after mold releasing, one end part of the guide post 31 extending into the guide post avoidance holes 19 is provided with a positioning post 310, the diameter of the positioning post 310 is smaller than the diameter of the guide post 31, the positioning posts 310 are inserted into the guide post positioning holes 110 and fixedly connected with the guide post positioning holes, and one end part of the guide post 31 is provided with one end of the positioning member 11 against the reinforcing member 11.
The guide posts 31 can be fixed on the reinforcing member 11 by the above structure, so that the parallelism of the guide posts is ensured, and the smoothness of the focusing movement of the follow-up telescopic lens barrel is further improved.
Of course, as an alternative, the hole diameter of the guide post positioning hole 110 is slightly smaller than the outer diameter of the guide post 31, and the two are in clearance fit.
Also, the telescopic barrel 2 of the present embodiment can be retracted into a chamber formed by the housing 6 and the base 1, or the telescopic barrel 2 can be extended from the top of the housing 6, that is, the above object can be achieved by the drive of the electromagnetic drive mechanism.
And the waterproof sealing gasket 7 is sleeved at one end of the telescopic lens barrel 2 far away from the base and is adhered to the inner top surface of the top of the shell 6. This design can prevent external contaminants from entering the inside of the housing from the gap reserved between the telescopic barrel 2 and the housing, resulting in the performance degradation of the electromagnetic drive mechanism, the elastic degradation of the reed, and the like.
As shown in fig. 1-6, the guide post bracket 30 is located between the waterproof gasket 7 and the base 1. So that the guide post can be limited in a relatively sealed space to prevent the increase of sliding resistance between the guide post and the guide post jacket 320 caused by the retention of pollutants, i.e. the service life of the guide post and the guide post jacket 320 can be prolonged, the smoothness of relative movement of the guide post and the guide post jacket 320 can be greatly improved, and the focusing efficiency and the focusing precision can be ensured.
Specifically, the guide post bracket 30 of this embodiment includes a middle retaining ring 300, the middle retaining ring 300 is sleeved on the periphery of the telescopic lens barrel to play roles of auxiliary guiding and axial lead restraining, and four cantilever plates 301 connected to the periphery of the middle retaining ring 300 are uniformly distributed circumferentially, so that the structure is convenient to assemble and process and manufacture, the suspension ends of the cantilever plates 301 are fixed on the first step 100 of the corner upright post 10 one by one, of course, the mounting precision of the cantilever plates 301 can be further improved by designing positioning pins on the step surface of the first step 100, meanwhile, glue can be designed between the cantilever plates 301 and the first step 100 to ensure that the suspension ends of the cantilever plates 301 are fixed stably, four guide posts 31 are respectively provided with guide post end holes 302 in the middle of each cantilever plate 301, and the upper ends of the guide posts 31 are inserted into the guide post end holes 302 one by one.
The corner upright post 10 and the first step 100 of the embodiment are integrally manufactured during injection molding, so that the precision is easy to control, the mounting precision of the guide post bracket 30 is ensured, and the mounting precision of the guide post is ensured.
As shown in fig. 1 to 6, the electromagnetic driving mechanism 4 includes a coil 40 wound around one end of the telescopic lens barrel 2 near the base 1, at least two driving magnets 41 distributed oppositely are arranged on the base 1, the driving magnets 41 are attached to the inner wall of the housing 6, and the driving magnets 41 are distributed on the periphery of the coil 40. Preferably, the driving magnets 41 of the present embodiment have four pieces and are distributed on four inner walls of the housing. Secondly, be equipped with magnetite location boss 12 respectively at base 1a surface four sides that are equipped with the bight stand, drive magnetite 41 installs on corresponding magnetite location boss 12 and paste corresponding inner wall at the shell, of course, drive magnetite 41 and the inner wall of shell can adopt the glue to carry out further reinforcement to and drive magnetite 41 keeps away from a surface of magnetite location boss 12 and paste in the interior top surface of shell. The drive magnets 41 are positioned between the two adjacent corner posts at the two ends in the length direction.
The coil 40 is powered by the reed 5.
Specifically, as shown in fig. 5, 10 and 11, the leaf 5 of the present embodiment includes a first elastic leaf spring 50 and a second elastic leaf spring 51, a first embedded conductive member 13 and a second embedded conductive member 14 are embedded in the base 1, one end of the first embedded conductive member 13 and one end of the second embedded conductive member 14 have exposed conductive terminals 18 protruding from the lower surface of the base 1, respectively, and the other end of the first embedded conductive member 13 and the other end of the second embedded conductive member 14 have exposed contact conductive surfaces 15, respectively, at one surface four corners of the base 1 provided with corner posts have leaf spring outer corner fixing surfaces 16, respectively, and the exposed contact conductive surfaces 15 are located in the corresponding leaf spring outer corner fixing surfaces 16, and the exposed contact conductive surfaces 15 and the leaf spring outer corner fixing surfaces 16 are flush, that is, the outer corners of the first elastic leaf spring 50 and the outer corners of the second elastic leaf spring 51 are respectively fitted to the leaf spring outer corner fixing surfaces 16 and are in contact with the corresponding exposed contact conductive surfaces 15, thereby realizing power supply.
That is, the exposed conductive terminal is connected to the power supply, and at this time, the electricity is transferred to the exposed contact conductive surface 15 through the first embedded conductive member 13 and the second embedded conductive member 14, that is, the external corner of the first elastic plate spring 50 and the second elastic plate spring 51 are electrically connected, at this time, the coil is electrified, and the matching of the coil and the driving magnet generates lorentz force, so as to achieve the purpose of focusing movement.
Of course, a leaf spring positioning pin may be provided on each leaf spring outer corner fixing surface 16, respectively, so that the outer corners of the first elastic leaf spring 50 and the second elastic leaf spring 51 are fixed at set positions. That is, pin holes are provided in the outer corners of the first elastic leaf spring 50 and the outer corners of the second elastic leaf spring 51, respectively, and the pin holes and the leaf spring positioning pins are paired to realize positioning.
In order to make focusing movement more accurate, as shown in fig. 3, 4 and 11, a position sensor 22 is fixed on the outer wall of one end of the telescopic lens barrel 2 close to the base 1, the position sensor 22 is connected with a flexible circuit board 23 fixed on the telescopic lens barrel 2, the position sensor 22 and one of the driving magnets are distributed relatively, that is, the flexible circuit board 23 can detect the focusing position of the telescopic lens barrel during focusing movement after supplying power to the position sensor 22, so as to improve the shooting definition.
Secondly, as an optimization of the above scheme, the first elastic leaf spring 50 and the second elastic leaf spring 51 have 3 electric connection terminals 52 respectively, of course, 2 electric connection terminals are also provided respectively, the number of the electric connection terminals is set according to practical situations, all the electric connection terminals 52 are electrically connected with the flexible circuit board 23, wherein the two circuits are that the first embedded conductive piece 13 and the second embedded conductive piece 14 supply power to the flexible circuit board 23, wherein the two circuits are that the detected data detected by the position sensor 22 are output to the control terminal from the flexible circuit board 23, at this time, the base 1 is internally embedded with two data transmission embedded pieces 17, the data transmission embedded pieces 17 are also provided with exposed contact surfaces 170 respectively arranged on the remaining two leaf spring exposed corner fixing surfaces 16, at this time, the corresponding corner parts of the first elastic leaf spring 50 and the second elastic leaf spring 51 are attached to the exposed contact surfaces 170 and form electric conduction, the first elastic leaf spring 50 is provided with two exposed corner parts, the second elastic leaf spring 51 is also provided with two exposed corner parts, the two exposed corner parts are respectively arranged on the two leaf spring exposed corner fixing surfaces 170, the two leaf spring exposed contact surfaces are respectively arranged on the two exposed contact surfaces 15 and the exposed contact surfaces 170, and the two exposed contact surfaces are far from one side of the base 1 and the exposed contact surfaces 170 respectively, and the exposed contact surfaces are connected with the exposed contact surfaces 15, respectively, and the exposed contact surfaces are connected with the exposed contact surfaces 170 respectively, and the two ends are connected to the two ends are respectively, and the exposed ends are arranged at one side 15 and the exposed contact surfaces and the exposed contact surfaces 15, and the exposed contact surfaces are respectively, and the exposed contact surfaces 15.
And 2 paths are used for supplying power to the coil after being powered through the flexible circuit board 23.
Preferably, the first elastic leaf spring 50 and the second elastic leaf spring 51 of the present embodiment have the same structure, and take the first elastic leaf spring 50 as an example, it includes a first sub-leaf body 500 having a first electrical connection terminal and a first outer corner portion, a second sub-leaf body 501 having a second electrical connection terminal and a second outer corner portion, and a third sub-leaf body 502 having a third electrical connection terminal.
The first electrical terminal is connected to the flexible circuit board and the first outer corner is electrically connected to the exposed contact conductive surface 15; the second electrical terminal is connected to the flexible circuit board, the second outer corner is electrically connected to the exposed contact surface 170, the third electrical terminal is connected to the flexible circuit board, and the end of the third sub-reed body 502 remote from the third electrical terminal is connected to the coil.
That is, the position sensor generally has 6 signals, of which 2 driving signals, 2 power signals and 2 control signals are led to the bottom of the telescopic barrel 2 through the flexible circuit board 23 and are connected to the reed 5 terminals of the bottom, respectively, wherein 2 driving signals are connected to the coil 40, 2 power signals and 2 control signals are led to the outer circumference of the reed 5 through the wire of the reed 5 and are connected to the electrodes of the base 1, and signals of the position sensor are led to an external control circuit.
The flexible circuit board 23 may also be referred to as an FPC circuit board. The control terminal obtains the detection data and then controls the electromagnetic driving mechanism, so as to control the focusing telescopic distance of the telescopic lens barrel, and achieve the purpose of accurate focusing.
The flexible circuit board 23 is arranged on the telescopic lens barrel, and the driving magnet can be arranged into 4 blocks at the moment so as to improve the focusing stroke and pushing weight of the lens.
Preferably, as shown in fig. 5-6, the waterproof gasket 7 of the present embodiment includes an outer annular fixing portion 70 and an annular wavy portion 71 connected to the inner side of the outer annular fixing portion 70, the outer annular fixing portion 70 is fixed on the second step 101 of the corner post 10 one by one through four corner pieces 73, the outer annular fixing portion 70 and the corner pieces 73 are respectively attached and fixed on the inner top surface of the housing 6, and the annular wavy portion 71 is sleeved on the outer wall of the end, far from the base 1, of the telescopic lens barrel 2.
The four sides of the outer annular fixing portion 70 are respectively provided with a magnet avoiding groove 72, so that the axial height of the driving magnet along the optical axis is increased, thereby further improving the pushing weight performance and prolonging the focusing stroke. The driving magnets are arranged in the corresponding magnet avoiding grooves and are adhered to the inner top surface of the shell.
Example two
Based on the first embodiment, as shown in fig. 12, the present embodiment provides an image pickup apparatus having the lens driving apparatus described in the first embodiment. The lens driving device carries a lens. Imaging devices such as cell phones and electronic tablets, and the like.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the invention. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.
Claims (9)
1. Lens driving device, comprising a base (1), characterized in that the lens driving device further comprises:
a telescopic lens barrel (2) for carrying a lens;
The guide post bracket (30) is sleeved on the periphery of the telescopic lens barrel (2) and is fixed on the corner upright post (10) of the base (1);
the guide posts (31) are provided with a plurality of guide posts; one end of each guide post (31) is fixed on the base (1), and the other end of each guide post (31) is fixed on the guide post bracket (30);
a shell (6) fastened on the base (1); the telescopic lens barrel (2) can retract into a cavity formed by the enclosure (6) and the base (1), or the telescopic lens barrel (2) can extend out from the top of the enclosure (6);
A waterproof gasket (7) in the shape of a ring; the waterproof sealing gasket (7) is sleeved at one end of the telescopic lens cone (2) far away from the base and is adhered to the inner top surface of the top of the shell (6);
And the electromagnetic driving mechanism (4) drives the telescopic lens barrel (2) to move in axial focusing mode on the optical axis.
2. Lens driving device according to claim 1, characterized in that a reed (5) is arranged between an end surface of the telescopic tube (2) close to the base (1) and the base (1).
3. Lens driving device according to claim 1, characterized in that a plurality of guide post avoidance through holes (19) are arranged on the base (1), one end of the guide post (31) far away from the guide post support (30) extends into the corresponding guide post avoidance through hole (19), and a reinforcing member (11) connected with the guide post (31) is embedded in the base (1).
4. A lens driving device according to claim 3, characterized in that the reinforcing member (11) is provided with a plurality of guide post positioning holes (110) which are communicated with the guide post avoidance through holes (19) one by one, one end part of the guide post (31) extending into the guide post avoidance through holes (19) is provided with a positioning post (310), the diameter of the positioning post (310) is smaller than that of the guide post (31), the positioning post (310) is inserted into the guide post positioning holes (110) and fixedly connected with the guide post positioning holes, and one end part of the guide post (31) provided with the positioning post (310) is propped against the reinforcing member (11).
5. A lens driving device according to claim 3, characterized in that the guide post holder (30) is located between the watertight gasket (7) and the base (1).
6. The lens driving device according to claim 5, wherein the guide post bracket (30) comprises a middle retaining ring (300) and four cantilever plates (301) connected to the periphery of the middle retaining ring (300), the cantilever ends of the cantilever plates (301) are fixed on the first step (100) of the corner upright post (10) one by one, four guide posts (31) are respectively arranged in the middle of each cantilever plate (301), guide post end holes (302) are respectively arranged in the middle of each cantilever plate (301), and the upper ends of the guide posts (31) are inserted into the guide post end holes (302) one by one.
7. The lens driving device according to claim 5, wherein the waterproof gasket (7) comprises an outer annular fixing portion (70) and an annular wavy portion (71) connected to the inner side of the outer annular fixing portion (70), the outer annular fixing portion (70) is fixed on the second step (101) of the corner upright post (10) one by one through four corner pieces (73), the outer annular fixing portion (70) and the corner pieces (73) are respectively attached to the inner top surface of the housing (6), and the annular wavy portion (71) is sleeved on the outer wall of one end, far away from the base (1), of the telescopic lens barrel (2).
8. The lens driving device according to claim 1, wherein the electromagnetic driving mechanism (4) comprises a coil (40) wound around one end of the telescopic lens barrel (2) close to the base (1), at least two driving magnets (41) which are distributed oppositely are arranged on the base (1), the driving magnets (41) are attached to the inner wall of the housing (6), and the driving magnets (41) are distributed on the periphery of the coil (40).
9. An image pickup apparatus, characterized in that the image pickup apparatus has the lens driving apparatus according to any one of claims 1 to 8.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410277441.XA CN118068510A (en) | 2021-12-07 | 2021-12-07 | Lens driving device and image pickup device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202410277441.XA CN118068510A (en) | 2021-12-07 | 2021-12-07 | Lens driving device and image pickup device |
| CN202111484328.1A CN114114602B (en) | 2021-12-07 | 2021-12-07 | Lens driving device and image pickup device |
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| JP2002006197A (en) * | 2000-06-26 | 2002-01-09 | Nidec Copal Corp | Lens driving device for camera |
| JP2005024650A (en) * | 2003-06-30 | 2005-01-27 | Nidec Copal Corp | Lens driving device |
| CN2638103Y (en) * | 2003-07-23 | 2004-09-01 | 英保达股份有限公司 | Clamping seat structure of network camera |
| TWM244686U (en) * | 2003-07-25 | 2004-09-21 | Hon Hai Prec Ind Co Ltd | Lens module and digital still camera module using the lens module |
| JP4555582B2 (en) * | 2004-02-03 | 2010-10-06 | Ｈｏｙａ株式会社 | Lens movement mechanism |
| CN100501553C (en) * | 2005-09-30 | 2009-06-17 | 鸿富锦精密工业（深圳）有限公司 | Clipper |
| TWM294046U (en) * | 2005-12-29 | 2006-07-11 | E Pin Internat Tech Co Ltd | Auto focusing lens module |
| TWI316160B (en) * | 2006-10-04 | 2009-10-21 | Ind Tech Res Inst | Automated focus optical lens module |
| TWI440914B (en) * | 2008-05-30 | 2014-06-11 | Hon Hai Prec Ind Co Ltd | Device for holding torsion meter and apparatus for testing torsion |
| TWI572937B (en) * | 2015-04-17 | 2017-03-01 | 台灣東電化股份有限公司 | Optical image anti-shake device with yoke |
| CN206489312U (en) * | 2016-02-17 | 2017-09-12 | 新思考电机有限公司 | Lens driver, photographic means and electronic equipment |
| JP2018180352A (en) * | 2017-04-17 | 2018-11-15 | シーエム・テクノロジー株式会社 | Lens drive device |
| CN108303779A (en) * | 2018-04-13 | 2018-07-20 | 湖南新视电子技术有限公司 | A kind of camera lens holder assembly suitable for webcam driver motor |
| CN109061829B (en) * | 2018-09-13 | 2024-07-12 | 昆山联滔电子有限公司 | Lens driving device and camera module |
| CN209356824U (en) * | 2019-03-20 | 2019-09-06 | Tcl通力电子（惠州）有限公司 | Shutter structure and picture pick-up device |
| CN110275270B (en) * | 2019-06-21 | 2024-07-02 | 辽宁中蓝光电科技有限公司 | Rotary module |
| CN210574587U (en) * | 2019-08-07 | 2020-05-19 | 惠州久久光学有限公司 | Camera optical lens fixing mechanism |
| CN210323523U (en) * | 2019-08-26 | 2020-04-14 | 天津市新正防爆电器有限公司 | Improved generation leaded light post location film clamp mechanism |
| CN211267446U (en) * | 2019-12-24 | 2020-08-14 | 维沃移动通信有限公司 | Support and electronic equipment |
| CN113608317A (en) * | 2021-08-09 | 2021-11-05 | 中山联合光电研究院有限公司 | Zoom lens and mobile terminal |
| CN113740991A (en) * | 2021-09-13 | 2021-12-03 | 新思考电机有限公司 | Lens driving device, imaging device, and electronic apparatus |
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2021
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