CN2763853Y - Automatic focusing device - Google Patents
Automatic focusing device Download PDFInfo
- Publication number
- CN2763853Y CN2763853Y CN 200420103600 CN200420103600U CN2763853Y CN 2763853 Y CN2763853 Y CN 2763853Y CN 200420103600 CN200420103600 CN 200420103600 CN 200420103600 U CN200420103600 U CN 200420103600U CN 2763853 Y CN2763853 Y CN 2763853Y
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- China
- Prior art keywords
- traversing carriage
- automatic focusing
- focusing mechanism
- drive device
- focalizer
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- Expired - Lifetime
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Abstract
The utility model provides an automatic focusing device, which comprises a lens module assembly and a drive device, wherein the drive device can drive the lens module assembly to move for focusing. The lens module assembly comprises a circular barrel, a sleeve barrel and a lens barrel, wherein the lens barrel is sheathed in the sleeve barrel; the lens barrel and the sleeve barrel are sheathed together in the circular barrel. The drive device is a hydraulic drive device.
Description
[technical field]
The utility model relates to a kind of automatic focusing mechanism, relates in particular to a kind of automatic focusing mechanism of realizing stable focusing.
[background technology]
Current society, digital camera is more and more universal, and the requirement of popular logarithmic code camera is also more and more higher.And occurred the mobile phone of numerous additional character camera functions on the market, and the specification of mobile phone digital camera is also more and more higher, has occurred the mobile phone digital camera of mega pixel up to now from 300,000 pixels of very early time.When pixel was more and more higher, the optical lens of fixed focal length was no longer suitable, and therefore masses pay close attention to further to the zoom function of mobile phone digital camera.
At present, but autozoom digital camera on the market adopts following two kinds of mechanism more: one focuses automatically for step motor drive, and two is that inductive coil drives focusing automatically.
The step motor drive correlation technique of focusing automatically please be joined TaiWan, China No. 88200669.As shown in Figure 1, a kind of focusing micro actuator comprises an inner housing 1a, a camera lens 2a, a stepper motor 5a, an annular gear wheel 4a.Wherein, camera lens 2a and stepper motor 5a all can place inner housing 1a, are connected with a transmission gear 50a on the stepper motor 5a, and it can drive annular gear wheel 4a and rotate, and then the camera lens 2a that can realize being sleeved among the annular gear wheel 4a moves with focusing.
This kind structure moves with focusing with the step motor drive camera lens, and one of shortcoming is the annular gear wheel that the entire automatic focusing device increases stepper motor and is attached thereto, and it is big that volume becomes, thereby increases the volume of digital camera or mobile phone.Two of shortcoming is to utilize stepper motor focusing, between camera lens and the image sensor relative rotation takes place, thereby causes eccentricity issues, so easy generation optical axis deflection.
Inductive coil drives the correlation technique of focusing automatically please join the TaiWan, China patent No. 92202890.Be illustrated in figure 2 as a kind of camera lens group structure, comprise: a lens mount 11b, but the dolly camera 12b of a relative displacement, a toroidal coil stator 21b, a magnet ring rotor 25b, toroidal coil stator 21b and magnet ring rotor 25b cooperate driving camera lens 12b.Wherein lens mount 11b inside directly installs toroidal coil stator 21b, and magnet ring rotor 25b inserts the sky of toroidal coil stator 21b and establishes space 23b.Camera lens 12b periphery encloses pin thread 13b, and is activity and screws togather relatively with the female screw 27b of the beam barrel 26b inner face of magnet ring rotor 25b.Magnet ring rotor 25b is subjected to the induction of toroidal coil stator 21b and start is rotated, and the dolly camera 12b that the female screw 27b of its beam barrel 26b inner face drives tool pin thread 13b makes telescopic displacement.
This kind structure is at the built-in magnet of inductive coil, the two cooperates the displacement of driving camera lens to realize automatic focusing, but owing in coil, added magnet, the weight of camera lens own is increased the weight of, so must strengthen the smooth moving lens of electric current ability that passes through inductive coil, thereby also can cause battery burden excessive.If magnet is placed outside the coil, this moment, required magnet volume relatively can be bigger, easily causes cost too high.
In sum, automatic focusing mechanism all can cause camera lens module volume and weight to increase, and also existence can not be stablized the problem of focusing to introduce adding magnet realization focusing automatically in drive motor and the inductive coil.
Be with, a kind of automatic focusing mechanism that drive motor and inductive coil can be realized stable focusing that need not is provided, real is necessary.
[utility model content]
Technical problem to be solved in the utility model is to provide a kind of automatic focusing mechanism of realizing stable focusing.
The utility model automatic focusing mechanism comprises a camera lens module, and a drive unit, described drive unit can drive the camera lens module and move with focusing; Described camera lens module comprises a cylinder, a sleeve and a lens barrel; Wherein, lens barrel is sleeved in the sleeve, and the two is sleeved in the cylinder together.Described drive unit is a fluid pressure drive device.
Compared with prior art, the utility model drives the camera lens module to realize focusing by fluid pressure drive device, compression or stretching, extension by liquid provide the drive force camera lens to move, need not quote physical constructions such as drive motor and coil, can make automatic focusing mechanism realize stable focusing, on the electronic product that is fit to be applied to take action.
[description of drawings]
Fig. 1 is the body exploded view of prior art automatic focusing mechanism.
Fig. 2 is the three-dimensional exploded view of prior art automatic focusing mechanism.
Fig. 3 is the cut-away view of the utility model automatic focusing mechanism.
Fig. 4 is the stereographic map of the camera lens module of the utility model automatic focusing mechanism.
Fig. 5 is the vertical view of Fig. 3 along the V-V place.
Fig. 6 is the cut-away view of first kind of fluid pressure drive device of the utility model automatic focusing mechanism.
Fig. 7 is the cut-away view of second kind of fluid pressure drive device of the utility model automatic focusing mechanism.
[embodiment]
See also Fig. 3, the utility model automatic focusing mechanism 100 comprises camera lens module 1, fluid pressure drive device 2 and supporter 3.Camera lens module 1 is connected with fluid pressure drive device 2, and fluid pressure drive device 2 drives camera lens modules 1 and move up and down realizing focusing, but and supporter 3 support lens modules 1 and fluid pressure drive device 2.
Described supporter 3 is a hollow cylindrical body, is benchmark with its axis, and camera lens module 1 is installed at the right cylinder center, and its inwall is provided with two H shape framves 30 respectively with camera lens module 1 symmetry.Described two H shape framves 30 are to extend to form two T shape support bodys (not indicating) by supporter 3 inwall vertical centre axis to form, and described two T shape support bodys and supporter 3 inwalls constitute H shape frame 30, so that fluid pressure drive device 2 to be installed.
Please together consult Fig. 4, described camera lens module 1 comprises a lens barrel 10, one sleeves 12 and a cylinder 14.Lens barrel 10 is built-in with lens set (figure does not show), is sleeved in the sleeve 12, and sleeve 12 then is sleeved in the cylinder 14.Wherein, described lens barrel 10 outer walls are provided with external thread 102.Described sleeve 12 also is a hollow cylindrical body, is arranged with three through holes (not indicating) on its outer wall respectively, and angle is 120 degree between the adjacent through-holes, and three traversing carriages 122 are arranged in wherein.Described three traversing carriages, 122 cylindrical clavas.The inwall of described sleeve 12 is provided with internal thread 124, internal thread 124 can match with the external thread 102 on lens barrel 10 outer walls so that lens barrel 10 is fixed in the sleeve 12, and 12 in lens barrel 10 and sleeve can move forward and backward lens barrel 2 to realize focusing by external thread 102 and 124 spiral shells of internal thread are moving.Described cylinder 14 is a hollow cylindrical body, and its outer wall is provided with three groups of L shaped grooves 140, and angle is 120 degree between the adjacent L shaped groove 140, and the position is corresponding with three traversing carriage 122 positions.Translot of described L shaped groove 140 (not indicating) and vertical slot (not indicating) be the tool certain width all, and the internal diameter of traversing carriage 122 is less than the translot of L shaped groove and the width of vertical slot.When sleeve 12 is inserted in cylinder 14, can make three traversing carriages 122 be easy to be fit into three L shaped grooves 140, and protrude out three L shaped grooves 140.
Please together consult Fig. 5, described fluid pressure drive device 2 places on the supporter 3, is three groups altogether, and corresponding respectively three traversing carriages 122 are provided with.Every group of fluid pressure drive device 2 comprises a pair of driver 20 and a pair of hydraulic pressure focalizer 22, and support 122 upper and lower sides that relatively move are provided with a driver 20 and a hydraulic pressure focalizer 22 respectively, and the upper and lower sides of described traversing carriage 122 is to be benchmark with the camera lens moving direction.Below only the fluid pressure drive device 2 that is positioned at traversing carriage 122 downsides of every group of fluid pressure drive device 2 is described in detail.
Please together consult Fig. 6, described driver 20 is a piezo-electric device, provides the hydraulic pressure focalizer 22 driving forces, makes hydraulic pressure focalizer 2 can drive camera lens module 1.Driver 20 is supported on the supporter 3, and the two links to each other by an elastic metallic pressing plate (figure does not show).Driver 20 comprises that two piezoelectric plates 220 and connect the charger 204 of described two piezoelectric plates 220, described two piezoelectric plates, 220 used piezoelectrics can be materials such as piezoelectric ceramics, the energising of piezoelectric tool produces the characteristic of mechanical deformation, its deformation quantity is directly proportional with voltage, is commonly used for dynamo-electric conversion transducer.Charger 204 is an external power supply, and after it was switched on to piezoelectric, two piezoelectric plates 220 can produce mechanical deformations, as expanding or shrinking.The deformation quantity of cause two piezoelectric plates 220 is directly proportional with voltage swing, therefore can control the deformation quantity that voltage swing is controlled two piezoelectric plates 220, and then realizes 22 effects of hydraulic pressure focalizer.
Please consult Fig. 3 once more, during assembling, at first assemble camera lens module 1, sleeve 12 is sleeved in the cylinder 14, and in packing three traversing carriages 122 on its outer wall into cylinder 14 along the vertical slot of three L shaped grooves 140 on cylinder 14 inwalls, three traversing carriages 122 protrude out three L shaped grooves 140, and sleeve 12 is placed on the translot of L shaped groove 140.Rotation lens barrel 10 makes external thread 102 on lens barrel 10 outer walls be bolted in internal thread 124 on sleeve 12 inwalls, and lens barrel 10 enters in the sleeve 12 by this, and then is installed on the cylinder 14.
Secondly, camera lens module 1 is installed in the center of supporter 3 cylinders, and three groups of fluid pressure drive devices 2 of corresponding three traversing carriages 122 are installed respectively.Two piezoelectric plates 220 of driver 20 are adhered on two sidewalls of the H shape frame 30 of supporter 3, and described driver 20 2 ends are connected with charger 204.After finishing installation three set drives 20, one perpendicular end of the hydraulic pressure focalizer 22 of fluid pressure drive device 2 is sticked on the H shape frame 30, and place 220 of the two piezoelectric plates of driver 20, another perpendicular end then resists on traversing carriage 220, finish the installation of three groups of hydraulic pressure focalizers 22 successively, fluid pressure drive device 2 assemblings are finished.So far automatic focusing mechanism 100 assemblings are finished.
Please consult Fig. 6 once more, during work, sleeve 12 is rotated, the traversing carriage 122 on sleeve 12 outer walls moves along the translot of the L shaped groove 140 on the cylinder 14, and makes traversing carriage 122 move to L shaped groove 140 translots and vertical slot intersection.If traversing carriage 122 is moved up, will be pressed on driver 20 energisings of the fluid pressure drive device 2 of traversing carriage 122 lower ends, cause two piezoelectric plates 220 to produce deformation, can make the elastic metallic pressing plate distortion of supporting driver 20.Two piezoelectric plates 220 produce deformation, can push the deformable container hydraulic pressure focalizer 22 that places between the two, making it produce corresponding deformation places the liquid oil body in the container to move up with extruding, the liquid oil body moves up and can make the perpendicular end of the hydraulic pressure focalizer 22 that is resisted against on the traversing carriage 122 produce driving force F upwards, forces traversing carriage 122 to move up.The deformation quantity of cause two piezoelectric plates 220 is directly proportional with voltage swing, therefore can control the deformation quantity that voltage swing is controlled two piezoelectric plates 220, and then the size of may command driving force F, thus the distance that controls lens moves up.And the driver 20 of traversing carriage 122 upper ends is in off-position at this moment, can not produce the resistance of downward resistance traversing carriage 122, moves up so driving force F can promote the hydraulic pressure focalizer 22 of upper end.If traversing carriage 122 is moved down, can make driver 20 outages that place its lower end, and make driver 20 energisings that place the upper end, can realize that so traversing carriage 122 moves down to realize the camera lens focusing.
Above-mentioned embodiment is that fluid pressure drive device 2 driving camera lens modules 1 move up and down with focusing, mainly with the driver 20 extruding hydraulic pressure focalizers 22 of fluid pressure drive device 2, moves up and down to realize that camera lens moves by traversing carriage 122.The fluid pressure drive device 2 of this kind structure is for being piezo-electric device by driver 20, can produce deformation and provides driving force so that camera lens module 1 moves.
The structure of above-mentioned fluid pressure drive device 2 only is a kind of mode of the utility model, also can adopt following fluid pressure drive device 2 structures.
See also Fig. 7, above-mentioned camera lens module 1 structure and all same as shown in Figure 3 with the position relation of fluid pressure drive device 2.Fluid pressure drive device 2 relative three traversing carriages 122 are three groups also, and the H shape frame 30 that is supporter 3 supports.But place the hydraulic pressure focalizer 22 of the fluid pressure drive device 2 of traversing carriage 122 upper and lower sides to link to each other for passing through a fluid operated pump 206, by fluid operated pump 206 runnings, can be to opposite side hydraulic pressure focalizer 22 with the liquid oil body suction in the traversing carriage 122 1 side hydraulic pressure focalizers 22, and then provide the perpendicular end driving force that is resisted against on the traversing carriage 122 to move to drive camera lens module 1.
During assembling, the inner assembling of camera lens module 1 and identical with above-mentioned embodiment assembling mode with the installation between the fluid pressure drive device 2, and the hydraulic pressure focalizer of fluid pressure drive device is connected with a fluid operated pump 206 and gets final product.
During work, if traversing carriage 122 is moved up, drive fluid operated pump 206, make liquid oil body in the hydraulic-driven focus control 22 of upside in the hydraulic-driven focus control 22 that is displaced downwardly to downside, so can make the hydraulic-driven focus control 22 of lower end produce the driving force F ' that upwards compresses traversing carriage 122 moves up traversing carriage 122, the hydraulic pressure focalizer 22 that so also can promote the upper end up moves, form thus to push away-the La Move Mode drives camera lens and moves.Traversing carriage 122 moves down, and process in contrast.
To be not limited only to be three for the L shaped groove 140 that is referred to as, traversing carriage 122 in the above-mentioned embodiment, can be symmetrically distributed along the cylinder outer wall of cylinder 14 and sleeve 12, as establishing four L shaped grooves 140 and four traversing carriages 122, and be 90 degree between adjacent L shaped groove and between adjacent traversing carriage, and corresponding traversing carriage 122 is installed fluid pressure drive device 2 respectively.
In sum, the utility model drives camera lens with fluid pressure drive device 2 and moves, and the liquid oil body via in the hydraulic pressure focalizer 22 of voltage swing extruding deformable container makes it to drive camera lens and moves up and down.This kind structure has stable automatic focusing position locomotive function, need not physical constructions such as motor or coil.
Claims (10)
1. an automatic focusing mechanism comprises a camera lens module, and a drive unit, described drive unit can drive the camera lens module and move with focusing; Described camera lens module comprises a cylinder, a sleeve and a lens barrel; Wherein, lens barrel is sleeved in the sleeve, and the two is sleeved in the cylinder together; It is characterized in that: described drive unit is a fluid pressure drive device.
2. automatic focusing mechanism as claimed in claim 1, it is characterized in that: described sleeve is a hollow cylindrical body, on its outer wall respectively symmetry outwards vertically extend to form traversing carriage, described cylinder is a hollow cylindrical body, its outer wall is arranged with L shaped groove, and is corresponding with the traversing carriage position respectively.
3. automatic focusing mechanism as claimed in claim 2, it is characterized in that: described traversing carriage and L shaped groove can be three, and the angle between adjacent traversing carriage and L shaped groove is 120 degree, and the cylindrical clava of described traversing carriage, its cylinder internal diameter is less than the translot of L shaped groove and the width of vertical slot, and traversing carriage can protrude out L shaped groove.
4. automatic focusing mechanism as claimed in claim 3, it is characterized in that: described automatic focusing mechanism also comprises a supporter, it is a hollow cylindrical body, the camera lens module is accommodated at the center, the symmetrical respectively vertical centre axis of supporter inwall extends to form two T shape support bodys, and constitute H shape frame with the supporter inwall, so that fluid pressure drive device to be installed.
5. automatic focusing mechanism as claimed in claim 4 is characterized in that: the corresponding traversing carriage setting of described fluid pressure drive device, and the corresponding a pair of fluid pressure drive device of each traversing carriage, and fluid pressure drive device is installed in downside on the traversing carriage respectively.
6. automatic focusing mechanism as claimed in claim 5, it is characterized in that: described fluid pressure drive device comprises a driver and a hydraulic pressure focalizer, driver is an external power supply that hydraulic pressure focalizer driving force can be provided, and the hydraulic pressure focalizer can produce displacement to drive the camera lens module.
7. automatic focusing mechanism as claimed in claim 6 is characterized in that: described driver is supported on the supporter with the elastic metallic pressing plate.
8. automatic focusing mechanism as claimed in claim 7 is characterized in that: described driver comprises that two piezoelectric plates and connect the charger of described two piezoelectric plates, and described charger can be given the power supply of two piezoelectric plates.
9. automatic focusing mechanism as claimed in claim 5, it is characterized in that: described a pair of fluid pressure drive device comprises a driver and a hydraulic pressure focalizer, driver is a fluid operated pump that driving force can be provided, it connects the perpendicular end of described a pair of hydraulic pressure focalizer, and the perpendicular end of another of hydraulic pressure focalizer then is pressed on the traversing carriage.
10. automatic focusing mechanism as claimed in claim 8 or 9, it is characterized in that: described hydraulic pressure focalizer is a deformable container, liquid is housed in it, and described hydraulic pressure focalizer places traversing carriage upside shape to be ㄇ shape, place the traversing carriage downside then to be ㄩ shape, one is perpendicular to be held on the H shape frame that is supported on the supporter, and is clamped between described two piezoelectric plates, and another perpendicular end is pressed on the traversing carriage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420103600 CN2763853Y (en) | 2004-12-30 | 2004-12-30 | Automatic focusing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420103600 CN2763853Y (en) | 2004-12-30 | 2004-12-30 | Automatic focusing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2763853Y true CN2763853Y (en) | 2006-03-08 |
Family
ID=36141396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420103600 Expired - Lifetime CN2763853Y (en) | 2004-12-30 | 2004-12-30 | Automatic focusing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2763853Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111781789A (en) * | 2020-08-07 | 2020-10-16 | 深圳市当智科技有限公司 | Hydraulic focusing system and projection equipment |
-
2004
- 2004-12-30 CN CN 200420103600 patent/CN2763853Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111781789A (en) * | 2020-08-07 | 2020-10-16 | 深圳市当智科技有限公司 | Hydraulic focusing system and projection equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20141230 Granted publication date: 20060308 |