CN100578278C - Optical focusing mechanism - Google Patents
Optical focusing mechanism Download PDFInfo
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- CN100578278C CN100578278C CN200710079108A CN200710079108A CN100578278C CN 100578278 C CN100578278 C CN 100578278C CN 200710079108 A CN200710079108 A CN 200710079108A CN 200710079108 A CN200710079108 A CN 200710079108A CN 100578278 C CN100578278 C CN 100578278C
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- focusing mechanism
- piezo
- activator
- mechanism according
- pedestal
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Abstract
The invention provides an optical focusing device, including base, sleeve which is coupled with the base, screw thread is connected with lens of the sleeve, and piezoelectric actuator which is fixed in the base for contiguously driving sleeve rotating, the base and the lens are respectively equipped with corresponding locating sliding first guiding part and second guiding part, then the sleeve is driven to rotate for converting and forcing the lens to focus. So the optical focusing device having simple components improves the driving force and overcomes the defects that the component with prior art is complex.
Description
Technical field
The present invention relates to a kind of Driving technique of optical lens, refer to a kind of optics focusing mechanism of driving type piezoelectric actuator especially.
Background technology
The optical system that is used for mobile phone or camera in recent years, because of the restriction of himself thickness will make optical system and actuator structure simple as much as possible, volume dwindles as far as possible, to adapt to the development trend of the low framework of this class device.Piezo-activator has that volume is little, big, the low power consumption of exerting oneself, silent and compatible advantages of higher, and but quilt is applied in digital camera or the camera cell phone, be used for driving optical lens, make this optical lens have the effect that furthers or zoom out, become one of important technology of optical system or dependent merchandise.
TaiWan, China is announced in No. 589777 patent of invention and is disclosed the piezoelectric actuated formula ultrasonic motor of a kind of multi-layer thin dish, its piezo with the piezoelectricity material passes to high-tension alternating voltage and produces alternately flexible deformation, interlock elastic vibration plate produces moving standing wave and supplies with external kinetic energy, and forms driver module with perpendicular or parallel symmetrical manner.Though case can reduce the abrasion of assembly before this patent, yet, therefore cause the motor configuration complexity, and be difficult to microminiaturization and cause the restriction of range of application owing to must be used in combination many group driver modules.
United States Patent (USP) the 7th, 099, No. 093 case discloses a kind of small-sized camera lens module, as shown in Figure 1, mainly be to utilize piezo-activator 100 to drive power wheels 101 location rotating screw bolts 102, and then camera lens 103 produced advance or retreat, by principle of moments M=rxF viewpoint, power wheel 101 miniaturizations, though can make whole smaller volume, piezo-activator 100 must be exerted oneself strengthen and power hungry, if power wheel 101 becomes big, then Zheng Ti volume can increase relatively, is unfavorable for miniaturization.
United States Patent (USP) the 5th, 225, No. 941 case discloses a kind of drive unit, as shown in Figure 2, mainly is to utilize lamination type piezo-activator 104 when power source, shell fragment 105 generation precompressions, when drive signal is imported, can drive camera lens 106 and advance or retreat, but, lamination type piezo-activator 104 must be made multilayer laminated boards formula piezoelectric patches just can be had big displacement and exert oneself greatly, so, its slimming certainly will be had its difficulty.
United States Patent (USP) the 6th, 710, No. 950 case discloses a kind of piezo-activator that is applied to the optical system of digital camera, as shown in Figure 3, be included in sleeve 108 combined outside one piezo-activator 109 of installing mirror group 107, a plurality of piezoelectric patches 111 that the inner surface that this piezo-activator 109 is included in a circuit board 110 is equally spaced installed, and in the protruding pad 112 of this piezoelectric patches 111 surface combination, one engagement respectively, thereby produce surface wave by applying a voltage to respectively this piezoelectric patches 111 that is surrounded on these mirror group 107 outer circumference surfaces, stir mirror group 107 synchronously so that respectively mesh protruding pad 112, with respect to these lens barrel 108 axial displacements, and then the optical zoom or the focusing of reaching digital camera.But case must be used a plurality of piezoelectric elements and cause the difficulty that cost is expensive and assemble before this patent, moreover want driven in synchronism respectively this piezoelectric element stir the mirror group, also be very difficult to control the precision of displacement, in addition, the length of lens barrel 108 must be foundation with the displacement of moving, if the distance that moves, then the length of lens barrel 108 also need extend, unfavorable trend toward miniaturization.
United States Patent (USP) the 6th, 961, No. 193 case discloses a kind of drive unit that is applied to drive camera lens, as shown in Figure 4, mainly produce inertial force and drive camera lens 114 and advance or retreat by piezoelectric patches 113, but, in order to produce inertial force, add to have adorned mass 115 in the outside, not only make whole external diameter become big, also make overall weight increase.
Because the shortcoming of aforementioned prior art, how a kind of optics focusing mechanism is provided torsion is big, volume is little, member is simple realize to drive, firm in structure, easy to manufacture with assemble effects such as convenient, and then overcome the existing problem of background technology, be to become the problem that present industry is demanded urgently overcoming.
Summary of the invention
The shortcoming of background technology in view of the above, one of the present invention purpose promptly is to provide a kind of optics focusing mechanism of simplifying member.
Another object of the present invention is to provide a kind of optics focusing mechanism of reduced volume.
A further object of the present invention is to provide a kind of optics focusing mechanism that drives torsion that promotes.
Another purpose of the present invention is to provide a kind of optics focusing mechanism firm in structure.
The present invention's another purpose again is to provide a kind of optics focusing mechanism that is easy to make.
The present invention again again a purpose be to provide a kind of optics focusing mechanism that is easy to assemble.
For reaching above-mentioned purpose and other purpose, the invention provides a kind of optics focusing mechanism, comprise: pedestal, have first and second accommodation space of continuing, externally be communicated with the unthreaded hole of this first accommodation space, in abutting connection with first guidance part of this first accommodation space and be positioned at the axis part of this second accommodation space; Sleeve, the axis part in this second accommodation space of being coupling, and have first screw part; Camera lens is arranged in this first accommodation space, have correspondence be threaded io this first screw part second screw part, and corresponding the slip be positioned to second guidance part of this first guidance part, with according to this sleeve rotation carrying out axially-movable; And piezo-activator, it is fixed in this pedestal and contacts this sleeve outside, focuses to drive this camera lens in order to provide rotary power to drive this sleeve rotation.
In the aforesaid optics focusing mechanism, the axle center of this piezo-activator can be parallel to each other with the axle center of this sleeve; This piezo-activator can comprise a metal tube and two piezoelectric patches, and preferably, these two piezoelectric patches are the outside surfaces that are fixedly arranged on this metal tube at interval, and this metal tube can adopt for example aluminum pipe or copper pipe, wherein, this copper pipe can be brass tube, also replaceablely certainly is plastic tube but not exceed with metal tube.In addition, the number of plies of this piezoelectric patches can be single or multiple lift, simultaneously, this piezoelectric patches can according to condition shape be selected from the coating of polarization distribution, electrode, and cutting wherein one.
Be provided with two relative fixed orifices in this pedestal, in order to fix the two ends of this piezo-activator.The axis part of this pedestal comprise the bulge loop of being located at this pedestal inner and corresponding and this unthreaded hole concentric and be sheathed on this bulge loop and this sleeve between rolling member.In a preferred embodiment, this rolling member can be a rolling bearing, for example be selected from ball bearing, needle bearing, and roller bearing wherein one; In a preferred embodiment, this rolling member can comprise a plurality of balls, the inner headed face of this bulge loop then is provided with a plurality of grooves that this ball is set in order to the location, wherein, but a plurality of groove isogonisms are disposed at the inner headed face of this bulge loop, in addition, respectively this groove can be through to this pedestal outside, and borrows a circle to be sealed.
At least one side of this pedestal can be provided with the pressing part of this piezo-activator of compacting, in order to the prestress of this piezo-activator contact to this sleeve outside to be provided.In an embodiment, this pressing part can comprise being incorporated into this lid one side and pushing against this piezo-activator outside at least for example adjusts assembly for the prestress of screw, preferably, this pressing part can comprise that also being arranged at this prestress adjusts elastic parts between assembly and this piezo-activator, and this elastic parts is for example to be selected from spring, reed, to reach wherein one of rubber blanket.In another preferred embodiment, this pressing part can comprise the side cover that is incorporated into this pedestal one side at least and be arranged at this side cover and this piezo-activator between elastic parts, wherein, this elastic parts be for example be selected from spring, reed, and rubber blanket wherein one.This pedestal can comprise base and the cover cap that combines, this cover cap has first and second accommodation space of continuing, externally is communicated with the unthreaded hole of this first accommodation space and in abutting connection with first guidance part of this first accommodation space, and this base then has the axis part that is arranged in this second accommodation space relatively.
In the above-mentioned optics focusing mechanism, this sleeve outside can have a friction part, drives for the piezo-activator contact; Wherein, this friction part is the ring texture that can be surrounded on this sleeve outside, and this ring texture can be selected from metal, rubber, and high-abrasive material wherein one.In a preferred embodiment, this friction part can be the coating layer in the sleeve outside, and this coating layer be chosen from Fe not dragon, aluminium oxide, zirconia, boron nitride, reach wherein one of abrasion resistant mixture material.In addition, can fix the piezo-activator in this sleeve outside of a plurality of contacts in this pedestal, preferably, but respectively this piezo-activator isogonism is disposed at this sleeve outside.
First screw part of being located at this sleeve can be internal thread, and second screw part of being located at this camera lens then is relative external thread.In a preferred embodiment, this first guidance part can be the guide rail that is formed at this this first accommodation space of pedestal inner abutment, this second guidance part is then for being formed at this camera lens outside and corresponding being slidingly matched to the projection of this guide rail, preferably, this camera lens external stability one external member, and this projection is formed at this external member outside.In another preferred embodiment, this first guidance part can be the projection that is formed at this this first accommodation space of pedestal inner abutment, this second guidance part is then for being formed at this camera lens outside and corresponding being slidingly matched to the guide rail of this projection, similarly, an external member can be fixed in this camera lens outside, and this guide rail is formed at this external member outside.
Than prior art, the present invention can select to drive simultaneously a plurality of piezo-activators, thereby can promote driving torsion, and utilize single piezo-activator or drive a plurality of piezo-activators simultaneously, can drive the action of the flexible zoom of mirror group work in the camera lens body, reached the purpose with reduced volume, be beneficial to and for example be applied in the electronic installation such as mobile phone.In addition, pedestal of the present invention, camera lens, sleeve, and member such as piezo-activator there is no somewhat complex design, and can use general requirements product or one-body molded manufacturing, also reach simplification member, purpose firm and easy to manufacture.Moreover composition member of the present invention all has its location or chimeric place, assembles effect easily so also have.Hence one can see that, and the present invention overcomes the disappearance of background technology relatively, the industrial utilization of real tool height.
Description of drawings
Fig. 1 is the structural representation that shows the 7th, 099, No. 093 case of United States Patent (USP);
Fig. 2 is the structural representation that shows the 5th, 225, No. 941 cases of United States Patent (USP);
Fig. 3 is the structural representation that shows the 6th, 710, No. 950 cases of United States Patent (USP);
Fig. 4 is the structural representation that shows the 6th, 961, No. 193 cases of United States Patent (USP);
Fig. 5 is the first embodiment synoptic diagram that shows optics focusing mechanism of the present invention;
Fig. 6 A is the first embodiment exploded perspective view that shows optics focusing mechanism of the present invention;
Fig. 6 B is the base synoptic diagram that shows optics focusing mechanism first embodiment of the present invention;
Fig. 6 C is the cover cap synoptic diagram that shows optics focusing mechanism first embodiment of the present invention;
7A to 7D figure is four kinds of embodiment synoptic diagram of demonstration optics focusing mechanism of the present invention institute applying piezoelectric actuator; And
Fig. 8 is the second embodiment exploded perspective view that shows optics focusing mechanism of the present invention.
[primary clustering symbol description]
100 piezo-activators
101 power wheels
102 screw rods
103 camera lenses
104 lamination type piezo-activators
105 shell fragments
106 camera lenses
107 mirror groups
108 sleeves
109 piezo-activators
110 circuit boards
111 piezoelectric patches
112 meshing protruding pads
113 piezoelectric patches
114 camera lenses
115 masses
2 pedestals
2 bases
210,210 ' axis part
211,211 ' bulge loop
213,213 ' rolling member
215 grooves
217 fixed orifices
219 location divisions
23 cover caps
231 first accommodation spaces
232 first guidance parts
233 second accommodation spaces
234 unthreaded holes
235 fixed orifices
236 pressing parts
2361 side covers
2363 elastic partss
2365 through holes
237 windows
238 location divisions
25 circle envelopes
3 sleeves
31 first screw parts
33 friction parts
4 camera lenses
41 second screw parts
43 external members
431 second guidance parts
5 piezo-activators
51 metal tubes
53 piezoelectric patches
Embodiment
Following conjunction with figs. explanation specific embodiments of the invention are so that affiliated technical field those of ordinary skill can be understood technical characterictic of the present invention easily and reach effect.
As shown in Figure 5, it is the first embodiment synoptic diagram that shows optics focusing mechanism of the present invention, optics focusing mechanism provided by the present invention, comprise a pedestal 2, sleeve 3 in this pedestal is coupling, be threadedly connected to the camera lens 4 of this sleeve 3, and be fixed in this pedestal in order to contact the piezo-activator 5 that drives these sleeve 3 rotations, this pedestal 2 is respectively equipped with the guidance part 232 and second guidance part 431 that slides in corresponding location with this camera lens 4, thereby can change this camera lens 4 of drive by these piezo-activator 5 these sleeves 3 of driving focuses, the easy optics focusing mechanism of member promotes driving force thus, and overcomes the shortcoming of prior art member complexity.
In present embodiment, the axle center of the axle center of this piezo-activator 5 and this sleeve 3 is parallel to each other, so that preferable driving efficient to be provided, thereby can guarantee the outputting torsion maximum, if but the miniaturization of consideration overall volume also can make it the non-parastate that is in, but not exceed with the present embodiment those shown.In addition, this piezo-activator 5 can be under fixed voltage, impose single-phase resonant frequency (single-frequency and single phase place) or two-phase resonant frequency (single-frequency, the phase place difference) drives, but the effective supply voltage method is with wiring or peripheral hardware pin, look applied product design and different, because the method for these wiring or peripheral hardware pin really be that those of ordinary skill can be understood also unlabored part in the affiliated technical field, so in present embodiment, do not give announcement.
As Fig. 5 and shown in Figure 6, this pedestal 2 has first accommodation space 231 and second accommodation space 233 that continues, the unthreaded hole 234 that externally is communicated with this first accommodation space 231, first guidance part 232 in abutting connection with this first accommodation space 231, and be positioned at the axis part 210 of this second accommodation space 233, in present embodiment, this pedestal 2 comprises the base 21 and cover cap 23 that combines, this cover cap 23 has first accommodation space 231 and second accommodation space 233 that continues, the unthreaded hole 234 that externally is communicated with this first accommodation space 231, and in abutting connection with first guidance part 232 of this first accommodation space 231, this base 21 then has the axis part 210 that is arranged in this second accommodation space 233 relatively.
Please cooperate and consult shown in Fig. 6 A and Fig. 6 B, this base 21 have with this cover cap 23 in conjunction with after the relative axis part 210 that is arranged in this second accommodation space 233, thereby borrow this axis part 210 this sleeve 3 that is coupling, simultaneously by being limited in the axially-movable that limits this sleeve 3 in this second accommodation space 233.In present embodiment, this axis part 210 comprises the bulge loop 211 of being located at inner and corresponding and these unthreaded hole 234 concentrics and is sheathed on rolling member 213 between this bulge loop 211 and this sleeve 3, wherein, this rolling member 213 for example is a plurality of balls, the inner headed face of this bulge loop 211 then is provided with a plurality of grooves 215 that this ball is set in order to the location, a plurality of groove 215 isogonisms are disposed at the inner headed face of this bulge loop 211, and respectively this groove 215 can be through to this base 21 outsides, and borrow a circle envelope 25 to be sealed.In addition, in being close to place, an end angle and being provided with fixed orifice 217, in order to fix this piezo-activator 5.
Please cooperate and consult shown in Fig. 6 A and Fig. 6 C, this cover cap 23 is provided with first accommodation space 231 and second accommodation space 233 coaxial with this unthreaded hole 234 and that continue mutually, in present embodiment, this first accommodation space 231 is slightly larger than this unthreaded hole 234 for ccontaining this camera lens 4, and this second accommodation space 233 of arranging in pairs or groups is to provide this axially-movable space that camera lens 4 is focused, and these cover cap 23 inside are in for example being first guidance part 232 of guide rail to should first accommodation space, 231 both sides being provided with, and are provided with the fixed orifice 235 in corresponding aforementioned fixation hole 217.In the pedestal of being formed by this base 21 and this cover cap 23 2, utilize corresponding fixed orifice 217 and 235 can fix the two ends of this piezo-activator 5, so the optimal fixation boundary condition of this piezo-activator 5 is provided.In addition, be respectively equipped with location division 219 and 238 in addition, in order to the positioning action that provides this base 21 to combine with cover cap 23 in the corresponding position of this base 21 and this cover cap 23.
Aforementioned this base 21 and this cover cap 23 are in conjunction with forming a modular pedestal 2 with locking or adhesion system, be example and form this pedestal 2 by base 21 and this cover cap 23 in the present embodiment, be based on and simplify the original intention that part is made, but the structure of this pedestal 2 also can equivalent be changed to the base and the cover cap of other pattern, non-ly exceed with the present embodiment those shown, and the simple change of described part conformability to be that ordinary skill is arbitrary in the affiliated technical field all can understand and implement according to this, so arrange in pairs or groups no longer in addition embodiment and accompanying drawing are given unnecessary details.
This sleeve 3 is coupling and is arranged in the axis part 210 of this second accommodation space 233 in this pedestal 2 correspondences, and has and for example be first screw part 31 of internal thread.This axis part 210 is to comprise bulge loop 211 and be sheathed between this bulge loop 211 and this sleeve 3 for example be the design of the rolling member 213 of a plurality of balls in the collocation present embodiment, this sleeve 3 is placed in this bulge loop 211, and for example reaches the relation of being coupling for the rolling member 213 of a plurality of balls by contact.The one end outside of this sleeve 3 has a friction part 33, drive for these piezo-activator 5 contacts, in present embodiment, this friction part 33 is the ring texture that is surrounded on these sleeve 3 outsides, have the effect of blocking a plurality of balls concurrently, and this ring texture can be selected from metal, rubber, and high-abrasive material wherein one, for example use rubber neck, certainly in other embodiment, this friction part 33 also is located at the coating layer in sleeve 3 outsides, and this coating layer is a not dragon of chosen from Fe, aluminium oxide, zirconia, boron nitride, and the abrasion resistant mixture material wherein one, for example use iron not dragon coat sleeve 3 outsides, the friction part 33 of perhaps above-mentioned material being made ring-type is sheathed on the outer round surface of this sleeve 3.
This camera lens 4 is arranged in this first accommodation space 231, have correspondence be threaded io this first screw part 31 second screw part 41, and corresponding the slip be positioned to second guidance part 431 of this first guidance part 232, to carry out axially-movable according to these sleeve 3 rotations.In present embodiment, this second screw part 41 is for being located at the external thread of these camera lens 4 back segments, to cooperate this sleeve 3 for example is first screw part 31 of internal thread, and this second guidance part 431 is then for being located at the projection of these camera lens 4 leading portion both sides, and for example is first guidance part 232 of guide rail corresponding to this.In addition, an external member 43 can be fixed in these camera lens 4 leading portion outsides, and this for example is formed at this external member 43 outsides for second guidance part 431 of projection, so can use normalized camera lens 4 collocation to fix an external member 43, need not make the camera lens 4 with second guidance part 431 in addition.
This piezo-activator 5 is to be fixed in this pedestal 2 and to contact this sleeve 3 outsides according to its node, focus to drive this camera lens 4 in order to provide rotary power to drive these sleeve 3 rotations, its fixed form is to utilize this base 21 and cover cap 23 default two fixed orifices 217 and the 235 sheathed two ends of fixing this piezo-activator 5.Among the embodiment shown in Fig. 7 A, this piezo-activator 5 comprises a metal tube 51 and two piezoelectric patches 53, wherein, this metal tube 51 can be selected aluminum pipe or copper pipe (for example brass tube) for use, but it is non-as limit, also can for example replace with plastic tube, and these two piezoelectric patches 53 are fixedly arranged on the outside surface of this metal tube 51 at interval, for example take to be mutually the interval mode configuration of 90 degree angles.In addition, the number of plies of this piezoelectric patches 53 can be single or multiple lift, simultaneously, this piezoelectric patches 53 can be done polarization distribution, electrode coating or cutting according to condition shape, and among the embodiment shown in Fig. 7 B, the electrode coating of optimal vibration mode can be done in the surface of this piezoelectric patches 53, in the embodiment shown in Fig. 7 C, the polarization of optimal vibration mode can be done on this piezoelectric patches 53, in the embodiment shown in Fig. 7 D, the coupling of optimal vibration mode can be done on this piezoelectric patches 53.
This metal tube 51 can supply to connect the negative pole of establishing extra electric field, and these two piezoelectric patches 53 respectively can be for connecing the positive pole of establishing two groups of extra electric fields.By applying a voltage on the one piezoelectric patches 53, utilize inverse piezoelectric effect to make this piezo-activator 5 produce the mechanical energy of high frequency beat, and then form for example circular motion of the similar hula hoop mode of counter clockwise direction; Otherwise, apply a voltage on another piezoelectric patches 53, utilize inverse piezoelectric effect to make this piezo-activator 5 produce the mechanical energy of high frequency beat, and then form for example circular motion of the similar hula hoop mode of clockwise direction, therefore can provide two-way rotation (forward and reverse) power to be rotated motion to drive this sleeve 3.
And the type of drive of this piezo-activator 5 also changes shown in Fig. 7 A to Fig. 7 D as described above, for example can be the single-phase driving of single-frequency (for example Vsin ω t or Vcos ω t), single-frequency two-phase and drives (for example Vsin ω t and Vcos ω t), double frequency and drive (Vsin ω for example
1T and Vsin ω
2T or Vcos ω
1T and Vcos ω
2T, wherein ω
1Be not equal to ω
2).Certainly, also can adopt with driving voltage such as square wave or sawtooth wave for example and drive, non-ly exceed with the string ripple driving voltage shown in the present embodiment.
At least one side of this pedestal 2 can be provided with the pressing part 236 of this piezo-activator 5 of compacting, in order to the prestress of these piezo-activator 5 contacts to these sleeve 3 outsides to be provided.In present embodiment, cover cap 23 adjacent both sides in this pedestal 2 are equipped with pressing part 236, this pressing part 236 comprises the side cover 2361 that is incorporated into these cover cap 23 1 sides and is arranged at elastic parts 2363 between this side cover 2361 and this piezo-activator 5, wherein, this side cover 2361 is for example to seal this cover cap 23 default through holes 2365 with adhesion system, and this elastic parts 2363 is borrowed these side cover 2361 roof pressures and resiliency supported between this side cover 2361 and this piezo-activator 5, and adopt and for example be selected from spring, reed, reach wherein one of rubber blanket.Collocation selects for use the compression spring of suitable elasticity coefficient that suitable prestress is provided in present embodiment, but in other embodiment, this pressing part 236 also can adopt to be incorporated into this lid one side and to push against these piezo-activator 5 outsides for example adjusts assembly for the prestress of screw, utilize torque spanner to adjust this prestress and adjust the dynamics that assembly contacts these piezo-activator 5 outsides, can reach the prestress corrective action, certainly, also can between this prestress adjustment assembly and this piezo-activator 5, a for example aforesaid elastic parts 2363 be set.In addition, can be provided with the rotary state of a window 237 in cover cap 23 outsides of this pedestal 2, but this window 237 is not a necessary design in the modular product of reality for this sleeve 3 of observation.
Because the design of axis part 210 makes this sleeve 3 rotatably be positioned in second accommodation space 233 of this pedestal 2, and the camera lens 4 that is threadedly connected to this sleeve 3 slides the location by the correspondence of first guidance part 232 and second guidance part 431 and can't rotate, the arrange in pairs or groups corresponding design that is threaded of this first screw part 31 and second screw part 41 makes that the camera lens 4 that is arranged in this sleeve 3 can only be according to sleeve 3 rotations and axially-movable.Therefore, make its circular motion that produces similar hula hoop mode, can turn this sleeve 3, this camera lens 4 is moved vertically and zoom out or the focusing that furthers action by the friction phenomenon that contacts this sleeve 3 by applying external voltage to this piezo-activator 5.
Though present embodiment is to be example to fix a piezo-activator 5 in this pedestal 2, in other embodiment, also can according to the demand that drives power or speed optionally isogonism set up piezo-activator 5, be not to exceed with the collocation quantity shown in the present embodiment.In addition, no matter use single or multiple piezo-activator 5, only need to get final product to reach rotary-actuated effect around the friction part 33 that is contacted with these sleeve 3 outsides, its mutual configuration relation is also non-to exceed with the isogonism configuration relation around this sleeve 3.
In addition, though the piezo-activator 5 described in the present embodiment is to comprise that a metal tube 51 and two piezoelectric patches 53 are example, but the circular motion person that similar hula hoop mode can be provided such as all should conform with indication piezo-activator of the present invention, for example also can adopt common piezo tube (Piezoelectric Tube), comprise that one for example is the tubular piezo-electric ceramic body of lead zirconate titanate or electrostriction material, and be arranged at first of this piezoelectric ceramic body outer wall and space, second, with third electrode, and can borrow this first electrode connect the negative pole of establishing extra electric field, and this second, third electrode connects the positive pole of establishing two groups of extra electric fields respectively.
Rolling member 213 among aforementioned first embodiment is to comprise that a plurality of balls are example, the inner headed face of bulge loop 211 then must be provided with and a plurality ofly in order to the location groove 215 of this ball is set, yet also can adopt rolling bearing to replace described a plurality of ball and groove 215 in other embodiment.Show the second embodiment exploded perspective view of optics focusing mechanism of the present invention as Fig. 8, wherein about the pedestal 2 formed by base 21 and cover cap 23, sleeve 3, camera lens 4, with piezo-activator 5 in do not change the part of structural design, no longer repeat to give unnecessary details.In the optics focusing mechanism that present embodiment provided, this axis part 210 ' comprise the bulge loop 211 ' of being located at these pedestal 2 bases 21 inside and be sheathed on this bulge loop 211 ' and this sleeve 3 between rolling member 213 ', wherein, this rolling member 213 ' adopts a rolling bearing, for example ball bearing, needle bearing or roller bearing, this for example for the rolling member 213 ' of rolling bearing is sheathed between this sleeve 3 and the bulge loop 211 ', can be reached the relation of being coupling of this sleeve 3 and this pedestal 2 easily.
In sum, but the present invention utilizes piezo-activator to drive optical lens has reached a kind of optics focusing mechanism that is placed in video-signal system, surveillance, optical system, camera, digital camera or the camera cell phone, and the effect person that this optics focusing mechanism has that torsion is big, volume is little, member is simple, firm in structure, easy to manufacture and assembling is convenient etc., overcome shortcoming of the prior art already, meet usability, novelty and progressive on the industry in the patented claim important document.
The foregoing description is illustrative principle of the present invention and effect thereof only, but not is used to limit the present invention.Those of ordinary skill all can be under spirit of the present invention and category in the technical field under any, and the foregoing description is modified and changed.Therefore, the scope of the present invention should apply for as described later that claim is listed.
Claims (18)
1. optics focusing mechanism comprises:
Pedestal, have first and second accommodation space of continuing, externally be communicated with the unthreaded hole of this first accommodation space, in abutting connection with first guidance part of this first accommodation space and be positioned at the axis part of this second accommodation space;
Sleeve, the axis part in this second accommodation space of being coupling, and have first screw part;
Camera lens is arranged in this first accommodation space, have correspondence be threaded io this first screw part second screw part, and corresponding the slip be positioned to second guidance part of this first guidance part, with according to this sleeve rotation carrying out axially-movable; And
Piezo-activator, be fixed in this pedestal and contact this sleeve outside, focus to drive this camera lens in order to provide rotary power to drive this sleeve rotation, wherein, at least one side of this pedestal is provided with the pressing part of this piezo-activator of compacting, in order to the prestress of this piezo-activator contact to this sleeve outside to be provided.
2. optics focusing mechanism according to claim 1, wherein, this piezo-activator comprises a metal tube and two piezoelectric patches, these two piezoelectric patches are the outside surfaces that are fixedly arranged on this metal tube at interval.
3. optics focusing mechanism according to claim 2, wherein, the number of plies of this piezoelectric patches is to be selected from wherein one of individual layer and multilayer.
4. optics focusing mechanism according to claim 1, wherein, this first screw part is an internal thread, and this second screw part is an external thread.
5. optics focusing mechanism according to claim 1, wherein, this sleeve outside also is provided with a friction part, drives for the piezo-activator contact.
6. optics focusing mechanism according to claim 5, wherein, this friction part is to be the ring texture that is surrounded on this sleeve outside.
7. optics focusing mechanism according to claim 1 wherein, is fixed with the piezo-activator in this sleeve outside of a plurality of contacts in this pedestal, each piezo-activator isogonism is disposed at this sleeve outside.
8. optics focusing mechanism according to claim 1, wherein, this first guidance part is the guide rail that is formed at this this first accommodation space of pedestal inner abutment, this second guidance part is then for being formed at this camera lens outside and corresponding being slidingly matched to the projection of this guide rail; Or this first guidance part is the projection that is formed at this this first accommodation space of pedestal inner abutment, and this second guidance part is then for being formed at this camera lens outside and corresponding being slidingly matched to the guide rail of this projection.
9. optics focusing mechanism according to claim 8, wherein, this camera lens external stability one external member, and this projection is formed at this external member outside.
10. optics focusing mechanism according to claim 1, wherein, this axis part comprise the bulge loop of being located at this pedestal inner and corresponding and this unthreaded hole concentric and be sheathed on this bulge loop and this sleeve between rolling member.
11. optics focusing mechanism according to claim 10, wherein, this rolling member comprises a plurality of balls, and the inner headed face of this bulge loop then is provided with a plurality of grooves that this ball is set in order to the location.
12. optics focusing mechanism according to claim 11, wherein, a plurality of groove isogonisms are disposed at the inner headed face of this bulge loop.
13. optics focusing mechanism according to claim 11, wherein, respectively this groove is through to this pedestal outside, and borrows a circle to be sealed.
14. optics focusing mechanism according to claim 1 wherein, is provided with two relative fixed orifices, in order to fix the two ends of this piezo-activator in this pedestal.
15. optics focusing mechanism according to claim 1, wherein, this pressing part comprises the prestress adjustment assembly that is incorporated into this pedestal one side and pushes against this piezo-activator outside at least.
16. optics focusing mechanism according to claim 15, wherein, this pressing part also comprises the elastic parts that is arranged between this prestress adjustment assembly and this piezo-activator.
17. optics focusing mechanism according to claim 1, wherein, this pressing part comprise the side cover that is incorporated into this pedestal one side at least and be arranged at this side cover and this piezo-activator between elastic parts.
18. optics focusing mechanism according to claim 1, wherein, this pedestal comprises base and the cover cap that combines, this cover cap has first and second accommodation space of continuing, externally is communicated with the unthreaded hole of this first accommodation space and in abutting connection with first guidance part of this first accommodation space, and this base then has the axis part that is arranged in this second accommodation space relatively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710079108A CN100578278C (en) | 2007-02-13 | 2007-02-13 | Optical focusing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200710079108A CN100578278C (en) | 2007-02-13 | 2007-02-13 | Optical focusing mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101246243A CN101246243A (en) | 2008-08-20 |
| CN100578278C true CN100578278C (en) | 2010-01-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200710079108A Expired - Fee Related CN100578278C (en) | 2007-02-13 | 2007-02-13 | Optical focusing mechanism |
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| Country | Link |
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| CN (1) | CN100578278C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103135317A (en) * | 2011-11-22 | 2013-06-05 | 鸿富锦精密工业（深圳）有限公司 | Actuator and camera module comprising same |
| CN103487914B (en) * | 2012-06-13 | 2016-04-06 | 佳能企业股份有限公司 | Lens mechanism and Focusing module thereof |
| CN112433334B (en) * | 2020-11-30 | 2022-07-15 | 中国科学院长春光学精密机械与物理研究所 | Split type space optical remote sensor focusing structure |
| CN114647131B (en) * | 2020-12-18 | 2023-06-09 | 宁波舜宇光电信息有限公司 | Optical zoom camera module and corresponding portable terminal equipment |
| CN113777736A (en) * | 2021-09-04 | 2021-12-10 | 新思考电机有限公司 | Lens driving rotary connecting mechanism, lens driving device and camera device |
| CN113777739B (en) * | 2021-09-04 | 2023-12-22 | 新思考电机有限公司 | Lens driving barrel and housing connecting mechanism, lens driving device and image pickup device |
-
2007
- 2007-02-13 CN CN200710079108A patent/CN100578278C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN101246243A (en) | 2008-08-20 |
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