CN116243537B - Optical anti-shake device - Google Patents
Optical anti-shake device Download PDFInfo
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- CN116243537B CN116243537B CN202310529084.7A CN202310529084A CN116243537B CN 116243537 B CN116243537 B CN 116243537B CN 202310529084 A CN202310529084 A CN 202310529084A CN 116243537 B CN116243537 B CN 116243537B
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- Prior art keywords
- driving
- shake
- cavity
- pressure relief
- backflow
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
- G03B2205/0007—Movement of one or more optical elements for control of motion blur
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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
- G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
- G03B2205/0053—Driving means for the movement of one or more optical element
- G03B2205/0084—Driving means for the movement of one or more optical element using other types of actuators
Abstract
The invention discloses an optical anti-shake device, which comprises an optical lens, a main support and a plurality of optical anti-shake driving components, wherein the optical anti-shake driving components are uniformly arranged on the main support along the circumferential direction of the optical lens, and a driving rod is connected between each optical anti-shake driving component and the lens support; the optical anti-shake driving part comprises a micro heater and a driving element, the micro heater is arranged on the outer side of the driving element, one end of the driving rod is in contact connection with the optical lens, the other end of the optical lens is connected with a pneumatic piston, the pneumatic piston is arranged in an inner cavity of the driving element, and driving liquid is arranged in the inner cavity of the driving element. The invention can counteract the shake of the optical lens and play an anti-shake role.
Description
Technical Field
The invention particularly relates to an optical anti-shake device.
Background
High-performance camera lens modules are loaded on portable terminals such as smart phones and tablet computers. The high-performance camera lens module mounted on the portable terminal generally has an auto-focusing function and an optical anti-shake function. The optical anti-shake function is a function of reducing image instability due to external vibration or user's hand shake. The main stream of optical anti-shake is mainly electromagnetic coil driving type and SMA spring type. For a large-sized camera, larger electromagnetic force is required to be generated for driving the large-sized camera to perform optical anti-shake, so that larger magnetic field is required, but the large magnetic field can interfere internal components of the camera, and after the volume of the thermoelectric spring is enlarged, the response sensitivity of the thermoelectric spring is reduced, so that the optical anti-shake movement frequency is influenced.
Disclosure of Invention
The invention aims to solve the technical problem that the prior art has the defects, and provides an optical anti-shake device which can counteract shake of an optical lens and play an anti-shake role.
The technical scheme adopted by the invention for solving the technical problems is as follows:
an optical anti-shake device comprises an optical lens 1, a total support 4 and a plurality of optical anti-shake driving components, wherein the optical anti-shake driving components are uniformly arranged on the total support along the circumferential direction of the optical lens, and a driving rod is connected between each optical anti-shake driving component and the lens support;
the optical anti-shake driving component comprises a micro heater and a driving element, the micro heater is arranged on the outer side of the driving element, one end of the driving rod is in contact connection with the optical lens, the other end of the optical lens is connected with a pneumatic piston, the pneumatic piston is arranged in an inner cavity of the driving element, and driving liquid is arranged in the inner cavity of the driving element; the micro heater is used for heating the driving element, so that driving liquid in the cavity of the driving element is heated, gasified and expanded, and then the pneumatic piston is pushed to move along the length direction of the cavity of the driving element, so that the optical lens is driven to move along the length direction of the corresponding cavity of the driving element, and shake of the optical lens is counteracted.
According to the technical scheme, the optical anti-shake driving component further comprises a backflow pressure relief cavity, the backflow pressure relief cavity is arranged on one side of the driving original cavity, a backflow port and a pressure relief opening are formed in the side wall of the driving original cavity, the backflow port and the pressure relief opening are arranged between the backflow pressure relief cavity and the driving original cavity, the backflow pressure relief cavity is communicated with the driving original cavity through the backflow port and the pressure relief opening, and a pressure valve is arranged on the pressure relief opening; the opening and closing degree of the pressure valve is controlled to control the quantity and speed of the gasified gas of the driving liquid in the driving element entering the backflow pressure relief cavity, so that the movement of the pneumatic piston in the inner cavity of the driving element is quickly regulated.
According to the technical scheme, the reflux port is provided with a capillary reflux pipe.
According to the technical scheme, the pressure valve comprises a valve plate, a valve air hole, a spring driving plate and a miniature SMA spring, wherein the valve plate is arranged on the pressure relief opening, the valve air hole is arranged on the valve plate, the spring driving plate is arranged at one end of the valve plate, and one end of the miniature SMA spring is connected with the spring driving plate; the other end of the miniature SMA spring is connected with the backflow pressure release cavity or the driving element cavity, and the valve plate is controlled to move back and forth by controlling the miniature SMA spring to stretch out and draw back, so that the opening and closing degree of the pressure valve are adjusted, and when the overlapping degree of the valve air hole on the valve plate and the pressure release opening is larger, the opening of the pressure valve is larger.
According to the technical scheme, a connecting contact mounting groove 608 is formed in the outer side of the backflow pressure release cavity, a connecting contact of a miniature SMA spring is arranged in the connecting contact mounting groove, and a heat preservation sleeve is arranged outside the connecting contact; the miniature SMA spring is sleeved with a heat insulation telescopic sleeve.
According to the above technical scheme, the backflow pressure release cavity is transversely provided with a valve movement groove 605, and the edge of the valve plate is inserted into the valve movement groove.
According to the technical scheme, the top of the inner cavity of the backflow pressure relief cavity is provided with the liquid collecting inclined plane, and the low-level end of the liquid collecting inclined plane is arranged above the backflow port;
the pressure relief port and the backflow port are adjacently arranged, a partition plate is arranged between the pressure relief port and the backflow port, and a gap is reserved between the partition plate and the liquid collecting inclined plane; after the driving liquid in the driving element is partially gasified after being heated, gas enters the backflow pressure relief cavity from the inner cavity of the driving element through the pressure relief opening, the gas rises to the liquid collecting inclined surface at the top, is condensed on the liquid collecting inclined surface, slides into the backflow opening along the liquid collecting inclined surface, and flows back to the inner cavity of the driving element through the backflow opening.
According to the technical scheme, the heat dissipation fins and the heat preservation sleeves are arranged outside the backflow pressure relief cavity, the heat dissipation fins are arranged on the side wall of the backflow pressure relief cavity on one side of the backflow port, and the heat preservation sleeves are arranged on the side wall of the backflow pressure relief cavity on one side of the pressure relief port.
According to the technical scheme, an anti-shake spring is connected between the pneumatic piston and the outer end of the driving element.
According to the technical scheme, the optimal number of the optical anti-shake driving components is 4 or 6.
According to the technical scheme, the optical anti-shake device further comprises a lens support, the center of the lens support is provided with a lens mounting hole, sliding grooves are formed in the periphery of the lens support, the number of the sliding grooves is identical to that of the driving rods, the sliding grooves are arranged in a one-to-one correspondence mode, the optical lenses are sleeved in the lens mounting holes of the lens support, and the driving rods are arranged in the corresponding sliding grooves and can slide along the sliding grooves.
According to the above technical scheme, the heater includes micro-heater insulating layer 501 and micro-heater strip 503, and the driving element outer lane is located to micro-heater insulating layer 501 cover, and micro-heater strip 503 arranges between the inner circle of micro-heater insulating layer 501 and the outer lane of driving element, is equipped with micro-heater breach 502 on the micro-heater insulating layer 501, and the back flow pressure release cavity on the driving element wears out from micro-heater breach 502.
The invention has the following beneficial effects:
1. the micro heater is used for heating the driving element, so that driving liquid in the cavity of the driving element is heated, gasified and expanded, negative pressure is changed, and then the pneumatic piston is pushed to move along the length direction of the cavity of the driving element, so that the optical lens is driven to move along the length direction of the corresponding cavity of the driving element, shake of the optical lens is counteracted, and an anti-shake effect is achieved.
2. The opening and closing degree of the pressure valve is controlled to control the quantity and the speed of the gasified gas of the driving liquid in the driving element entering the backflow pressure relief cavity, so that the movement of the pneumatic piston in the inner cavity of the driving element is quickly regulated; the inside of the driving original is in a negative pressure state, so that the driving liquid is easier to gasify to generate steam, the heater continuously works, the pressure in the driving original is increased by the generated steam, the miniaturized SMA spring changes the air pressure in the driving original by controlling the opening of the pressure valve, and the movement of the miniature SMA spring is controlled to change the air pressure in the cavity, so that the expansion and the relaxation of the anti-shake spring 7 are driven, a larger driving force can be obtained under the condition of keeping high frequency, and the driving rod moves the lens bracket in multiple directions; the frequency of hand shake is generally lower than 20 Hz, and the miniaturized SMA spring can keep higher motion frequency so as to ensure the anti-shake effect, and the change of air pressure can drive the large and medium-sized cameras to perform anti-shake.
Drawings
FIG. 1 is a schematic diagram of an optical anti-shake apparatus according to an embodiment of the invention;
FIG. 2 is a schematic diagram of an optical anti-shake driving unit according to an embodiment of the invention;
FIG. 3 is a schematic view of a driving element according to an embodiment of the present invention;
FIG. 4 is a schematic view of the structure of the rear end lever of the driving lever in the embodiment of the present invention;
FIG. 5 is a schematic view of the structure of the front end lever of the driving lever in the embodiment of the present invention;
FIG. 6 is a schematic view of a micro-heater according to an embodiment of the present invention;
FIG. 7 is a schematic view of a lens holder according to an embodiment of the present invention;
FIG. 8 is a schematic diagram of a pressure valve in an embodiment of the invention;
FIG. 9 is a schematic view of the structure of the overall stent in an embodiment of the present invention;
FIG. 10 is a schematic view of the structure of a thermal insulation sleeve according to an embodiment of the present invention;
in the figure, a 1-optical lens, a 2-lens support, a 3-rear end rod, a 4-main support, a 5-micro heater, a 6-driving element, a 7-anti-shake spring, an 8-heat insulation sleeve, a 9-pressure valve, a 10-micro SMA spring, a 11-connecting contact, a 12-second sealing ring, a 13-first sealing ring and a 14-front end rod;
201-a sliding groove, 202-a lens mounting hole;
301-telescopic rod grooves, 302-displacement blocks;
401-a driving element mounting groove, 402-a backflow pressure release cavity opening;
501-a micro-heater heat insulation layer, 502-a micro-heater notch and 503-a micro-heater heating wire;
the device comprises a cavity inner wall 601, a radiating fin 602, a liquid collection inclined plane 603, a pressure relief port 604, a valve movement groove 605, a capillary return pipe 606, a displacement sensor 607, a connecting contact mounting groove 608 and a partition plate 609.
801-installing a curved surface of the heat preservation sleeve, and forming holes on 802-connecting contacts;
901-valve plate, 902-valve air hole, 903-spring driving plate, 904-heat insulation telescopic sleeve;
1401-telescoping rod, 1402-second seal mounting hole, 1403-first seal ring mounting hole, 1404-pneumatic piston.
Detailed Description
The invention will now be described in detail with reference to the drawings and examples.
Referring to fig. 1 to 10, an optical anti-shake device in an embodiment 1 provided by the present invention includes an optical lens 1, a main support 4, and a plurality of optical anti-shake driving components, where the plurality of optical anti-shake driving components are uniformly arranged on the main support 4 along a circumferential direction of the optical lens 1, and a driving rod is connected between each optical anti-shake driving component and the lens support 2;
the optical anti-shake driving part comprises a micro heater 5 and a driving element 6, wherein the micro heater 5 is arranged on the outer side of the driving element 6, one end of a driving rod is in contact connection with the optical lens 1, the other end of the optical lens 1 is connected with a pneumatic piston 1404, the pneumatic piston 1404 is arranged in an inner cavity of the driving element 6, and driving liquid is arranged in the inner cavity of the driving element 6; the micro heater 5 heats the driving element 6, so that driving liquid in the cavity of the driving element 6 is heated, gasified and expanded, and then the pneumatic piston 1404 is pushed to move along the length direction of the cavity of the driving element 6, thereby driving the optical lens 1 to move along the length direction of the corresponding cavity of the driving element 6, and counteracting the shake of the optical lens 1.
Further, a displacement sensor 607 is provided on the side wall of the cavity of the driving element 6 for detecting the position of the air piston 1404.
Further, the cavity length direction of the driving element 6 is arranged radially with the center of the optical lens 1.
Example 2
As shown in fig. 2-3 and fig. 8, the limitation of the back flow pressure relief cavity is further increased on the basis of the embodiment 1, and the performance of the limited embodiment 2 is better.
The optical anti-shake driving component further comprises a backflow pressure relief cavity, the backflow pressure relief cavity is arranged on one side of the driving original 6 cavity, a backflow port and a pressure relief opening 604 are formed in the side wall of the driving original 6 cavity, the backflow port and the pressure relief opening 604 are arranged between the backflow pressure relief cavity and the driving original 6 cavity, the backflow pressure relief cavity is communicated with the driving original 6 cavity through the backflow port and the pressure relief opening 604, and a pressure valve 9 is arranged on the pressure relief opening 604; the opening and closing degree of the pressure valve 9 is controlled to control the quantity and the speed of the gasified gas of the driving liquid in the driving element 6 entering the back flow pressure release cavity, so that the movement of the pneumatic piston 1404 in the inner cavity of the driving element 6 is quickly regulated; the inside of the driving original 6 is in a negative pressure state, so that water is easier to gasify to generate steam, after a camera or a camera is started, a heater continuously works, the generated steam enables the pressure in the driving original 6 to rise, the miniaturized SMA spring changes the air pressure in the driving original 6 by controlling the opening of a pressure valve 9, and then a driving rod moves the lens bracket 2 in multiple directions; the frequency of hand shake is generally lower than 20 Hz, and the miniaturized SMA spring can keep higher motion frequency so as to ensure the anti-shake effect, and the change of air pressure can drive the large and medium-sized cameras to perform anti-shake.
The controller of the camera is connected with each pressure valve 9, the controller is connected with a sensor, the controller can sense the shaking direction and displacement of the camera through the sensor, accordingly, the controller controls the opening and closing degree of the pressure valves 9 to control the quantity and speed of the gasified gas of the driving liquid in the driving element 6 entering the backflow pressure release cavity, and accordingly the optical lens 1 is driven to move along the length direction of the corresponding driving element 6 cavity, and shaking of the optical lens 1 is counteracted.
Further, the return port is provided with a capillary return tube 606.
Further, a micro electric gate and a liquid level sensor are arranged above the capillary return pipe 606, the liquid level sensor is arranged above the micro electric gate, when the liquid level sensor detects that enough driving liquid is accumulated in a return area formed on the left side of the partition plate 609 and above the micro electric gate, the micro electric gate is opened, so that the driving liquid flows into an inner cavity of the driving element 6 through the capillary return pipe 606, and the micro electric gate and the liquid level sensor are marked in the figure; the miniature electric gate can be a gate plate driven by a second SMA spring, and the second SMA spring drives the gate plate to move back and forth to open or close.
Example 3
As shown in fig. 2 and 8, the limitation of the pressure valve 9 is further increased on the basis of the embodiment 2, and the performance of the limited embodiment 3 is more excellent.
The pressure valve 9 comprises a valve plate 901, a valve air hole 902, a spring driving plate 903 and a miniature SMA spring 10, wherein the valve plate 901 is arranged on the pressure relief port 604, the valve air hole 902 is arranged on the valve plate 901, the spring driving plate 903 is arranged at one end of the valve plate 901, and one end of the miniature SMA spring 10 is connected with the spring driving plate 903; the other end of the miniature SMA spring 10 is connected with a backflow pressure release cavity or a driving element 6 cavity, and the valve plate 901 is controlled to move back and forth by controlling the miniature SMA spring 10 to stretch, so that the opening and closing degree of the pressure valve 9 is regulated, and when the overlap ratio of the valve air hole 902 on the valve plate 901 and the pressure release opening 604 is larger, the opening degree of the pressure valve 9 is larger.
Further, a connecting contact mounting groove 608 is formed in the outer side of the backflow pressure release cavity, a connecting contact 11 of a miniature SMA spring 10 is arranged in the connecting contact mounting groove 608, and a heat preservation sleeve 8 is arranged outside the connecting contact 11; the miniature SMA spring 10 is sheathed with a thermally insulating telescoping sleeve 904.
Further, a valve moving groove 605 is transversely arranged on the reflux pressure release cavity, and the edge of the valve plate 901 is inserted into the valve moving groove 605.
Further, a liquid collecting inclined plane 603 is arranged at the top of the inner cavity of the backflow pressure release cavity, and the low-level end of the liquid collecting inclined plane 603 is arranged above the backflow port;
the pressure relief port and the backflow port are adjacently arranged, a partition plate 609 is arranged between the pressure relief port 604 and the backflow port, and a gap is reserved between the partition plate 609 and the liquid collecting inclined plane 603; after the driving liquid in the driving element 6 is partially gasified after being heated, gas enters the backflow pressure relief cavity from the inner cavity of the driving element 6 through the pressure relief opening 604, the gas rises to the liquid collecting inclined surface 603 at the top, is condensed on the liquid collecting inclined surface 603, slides into the backflow opening along the liquid collecting inclined surface 603, and flows back to the inner cavity of the driving element 6 through the backflow opening.
Further, a heat dissipation fin 602 and a heat insulation sleeve 8 are arranged outside the backflow pressure relief cavity, the heat dissipation fin 602 is arranged on the side wall of the backflow pressure relief cavity on one side of the backflow port, and the heat insulation sleeve 8 is arranged on the side wall of the backflow pressure relief cavity on one side of the pressure relief port 604.
Further, an anti-shake spring 7 is connected between the pneumatic piston 1404 and the outer end of the driving element 6.
Further, the number of the optical anti-shake driving parts is even, and the optimal selection of the number of the optical anti-shake driving parts is 4 or 6.
Further, the optical anti-shake device further includes a lens support 2, a lens mounting hole 202 is provided in the center of the lens support 2, sliding grooves 201 are arranged around the lens support 2, the number of the sliding grooves 201 is the same as the number of the driving rods, the optical lenses 1 are arranged in a one-to-one correspondence manner, the ends of the driving rods are arranged in the corresponding sliding grooves 201, and the driving rods can slide relatively along the sliding grooves 201.
Further, the length direction of the sliding groove 201 is perpendicular to the extension and retraction direction of the driving rod, when the driving rod in one direction pushes the lens holder 2 and the optical lens 1 to move in the direction, the driving rods on both sides of the direction slide relative to the corresponding sliding groove 201 on the lens holder 2.
Further, the lens support 2 is arranged in an inner frame of the total support 4, a plurality of driving element mounting grooves 401 are formed in the total support 4, the driving element mounting grooves 401 and the driving elements 6 are arranged in a one-to-one correspondence mode, the driving elements 6 are arranged in the driving element mounting grooves 401, a backflow pressure release cavity opening 402 is formed in one side of each driving element mounting groove 401, and the backflow pressure release cavity opening 402 is formed in the total support 4.
Further, the micro-heater 5 comprises a micro-heater heat insulation layer 501 and a micro-heater heating wire 503, the micro-heater heat insulation layer 501 is sleeved on the outer ring of the driving element 6, the micro-heater heating wire 503 is arranged between the inner ring of the micro-heater heat insulation layer 501 and the outer ring of the driving element 6, a micro-heater notch 502 is arranged on the micro-heater heat insulation layer 501, and a backflow pressure relief cavity on the driving element 6 penetrates out of the micro-heater notch 502.
Further, the driving rod comprises a front end rod 14 and a rear end rod 3, the pneumatic piston 1404 is arranged at one end of the front end rod 14, the other end of the front end rod 14 is provided with a telescopic rod 1401, one end of the rear end rod 3 is provided with a telescopic rod groove 301, the telescopic rod 1401 of the front end rod 14 is sleeved with the telescopic rod groove 301 of the rear end rod 3, the telescopic rod 1401 can slide along the telescopic rod groove 301, and the other end of the rear end rod 3 is in contact connection with the outer ring of the optical lens 1; in the initial state, the inside of the driving element 6 is in a negative pressure state, at this time, the anti-shake spring 7 is in a compressed state, when the air pressure in the driving element 6 changes, the anti-shake spring 7 is lengthened, the pneumatic piston 1404 moves towards the optical lens, the telescopic rod 1401 slides in the telescopic rod groove 301, the driving rod is shortened, at this time, the rear end rod 3 of the driving rod does not drive the optical lens 1 to move, the pneumatic piston 1404 continues to move outwards until the driving rod is shortened to the shortest, and the anti-shake spring 7 is restored to the original length; if the air pressure in the driving element 6 continues to be increased, the air piston 1404 moves outwards, and the driving rod pushes the optical lens 1 to move.
One end of the rear end rod is provided with a telescopic rod groove 301, the other end of the rear end rod is provided with a displacement block 302, the displacement block 302 is arranged in a corresponding sliding groove on the lens bracket 2, the driving rod slides in the sliding groove through the displacement block 302, and the displacement block is mutually perpendicular to the telescopic directions of the front end rod and the rear end rod of the driving rod along the sliding direction of the sliding groove.
The outer lane of the pneumatic piston 1404 is provided with a sealing ring, the sealing ring is arranged between the inner cavities of the pneumatic piston 1404 and the driving original, the number of the sealing rings is two, namely a first sealing ring 13 and a second sealing ring 12, the outer lane of the pneumatic piston 1404 is sequentially provided with a first sealing ring mounting hole 1403 and a second sealing mounting hole 1402, and the first sealing ring 13 and the second sealing ring 12 are respectively arranged in the first sealing ring mounting hole 1403 and the second sealing mounting hole 1402.
The thermal insulation sleeve 8 is provided with a connecting contact hole 802, the connecting contact 11 is arranged in the connecting contact hole 802, and the thermal insulation layer 501 of the micro heater is provided with a thermal insulation sleeve mounting curved surface 801 for mounting the thermal insulation sleeve 8.
Further, the SMA spring is a memory alloy spring and can be electrified to stretch and retract.
The working principle of the invention is as follows: referring to fig. 1, in the optical anti-shake device provided by the invention, under the initial condition, the optical lens 1 and the photosensitive chip are located in the same axis, the micro heater 5 is not turned on, and the connection contact 11 communicated with the micro SMA spring 10 is not electrified, so that the pressure valve 9 connected with the micro SMA spring 10 closes the pressure relief port 604 at the moment, and the inside of the original cavity is driven to be in a negative pressure state. An anti-shake spring 7 is connected between the driving element 6 and the front pneumatic piston 1404 of the front end 14 of the driving rod, and the anti-shake spring 7 is always in a compressed state because of the negative pressure state in the driving element 6, and when the air pressure in the driving element 6 changes, the length of the reset anti-shake spring 7 also changes. The telescopic rod 1401 of the front rod 14 slides in the telescopic rod groove 301 and changes from the first elongated state to the shortened state, and further, by changing the displacement of the driving rod 3, the lens holder 2 is driven, and further, the optical lens 1 mounted on the lens holder 2 is driven.
After the camera is opened, four micro-heaters 5 are simultaneously electrified and heated, and the heating wires 503 of the micro-heaters transmit heat to the inner wall 601 of the cavity of the driving element, and as the micro-heater heat insulation layer 501 is arranged on the outer side of the micro-heaters 5, heat cannot be transmitted to other parts of the camera, and the damage caused by heating is prevented. Because the inner cavity of the driving element 6 is in a negative pressure state, the liquid in the cavity is easy to be vaporized by the change of heat, the pressure in the cavity is changed, the heater is in fixed power, the vacuum degree in the driving element 6 is reduced when the liquid is vaporized to generate vapor, the anti-shake spring 7 which is originally in a compressed state is stretched, at the moment, the telescopic rod 1401 moves along the telescopic rod groove 301 towards the direction close to the optical lens 1 and moves to the rear end section of the driving rod to be contacted with the front end section of the driving rod, the micro heater keeps in an open state all the time, the vapor is continuously generated in the cavity, at the moment, the micro SMA spring 10 is electrified to stretch, the valve air hole 902 and the pressure relief opening 604 are partially overlapped, the vapor enters the upper cavity from the overlapped part, the vapor is not immediately cooled and liquefied after the vapor with temperature contacts with the water, when the vapor contacts with the liquid collecting inclined plane 603, the heat dissipation fin 602 emits the heat, the liquid drops downwards along the liquid collecting inclined plane 603 to the liquid collecting groove 609 and the front end section of the driving rod, the liquid is returned into the main cavity through the capillary tube 606. In order to improve the working stability in the cavity, a shutter (not shown) driven by a second SMA spring is arranged at the upper part of the capillary return pipe 606, and a liquid level sensor (not shown) is arranged at the upper part of the liquid collecting tank, when the liquid level sensor detects that the liquid in the liquid collecting tank reaches a certain index, the SMA spring connected with the shutter is electrified and stretched, so that the liquid is in direct contact with the capillary return pipe 606, and the liquid rapidly returns to the cavity under the capillary action. The cavity of drive original paper is as main cavity, and the inner chamber of backward flow pressure release cavity is as cooling chamber, because flashboard and valve gas pocket are opened simultaneously, and capillary back flow 606 pipeline aperture is very thin and the pipeline is tortuous, and aerodynamic drag is very big, and the interior steam of main cavity of drive original paper can not get into cooling chamber from this, and the great majority of vaporized steam gets into cooling chamber by the less valve gas pocket 902 department of air lock. The device is ready to operate when the size of the overlap between the valve vent 902 and the pressure relief vent 604 is controlled so that the cooling rate of the vapor is the same as the rate of heating.
When the camera is started, the built-in electronic gyroscope of the camera is started, if the optical lens 1 shakes leftwards, different electric signals are respectively transmitted to the left and right miniature SMA springs 10 through the connecting contact 11, the left miniature SMA springs are electrified and elongated to be smaller, the size of an overlapping area of the valve air hole 902 and the pressure relief opening 604 is reduced, therefore, the water vapor cooling speed is smaller than the generation speed, the negative pressure in a left driving original cavity is reduced, the pneumatic piston 1404 moves rightwards under the action of the anti-shake spring 7, and the first sealing ring 13 and the second sealing ring 12 arranged on the front end rod 14 of the driving rod enable the air pressure in the cavity not to leak. Similarly, the right side mini SMA spring is more extended by energizing, so that the overlap area between the valve vent 902 and the pressure relief 604 is enlarged, and the water vapor cooling rate is greater than the generating rate, so that the pneumatic piston 1404 moves rightward under the action of air pressure. The movement distance of the front end rods 14 of the driving rods on the left and the right sides is regulated and controlled by the displacement sensor 607 at the tail of the driving element 6, so that the movement displacement of the optical anti-shake device is matched with the shake condition of a person in the current situation. At this time, the upper and lower miniature SMA springs are still at a conventional length, so that the water vapor generation rate is the same as the cooling rate. When the lens moves horizontally or vertically in other directions, the two driving elements 6 are kept still, and the water vapor cooling speed and the generating speed of the other two driving elements are changed. If the lens moves obliquely relative to each other, a plurality of driving elements 6 are required to be simultaneously regulated so that the optical lens 1 can move in any direction along the inner area of the total holder 4. The movement of the miniature SMA spring is controlled to change the air pressure in the cavity, so that the expansion and the relaxation of the anti-shake spring 7 are driven, a larger driving force can be obtained under the condition of keeping high frequency, the movement of the large-scale optical lens 1 is realized, and the higher movement frequency can be ensured because the SMA spring with the control frequency belongs to the miniature type.
The foregoing is merely illustrative of the present invention and is not intended to limit the scope of the invention, which is defined by the claims and their equivalents.
Claims (8)
1. The optical anti-shake device is characterized by comprising an optical lens, a lens bracket, a total bracket and a plurality of optical anti-shake driving components, wherein the plurality of optical anti-shake driving components are uniformly arranged on the total bracket along the circumferential direction of the optical lens, the optical lens is arranged on the lens bracket, and a driving rod is connected between each optical anti-shake driving component and the lens bracket;
the optical anti-shake driving component comprises a micro heater and a driving element, the micro heater is arranged on the outer side of the driving element, one end of a driving rod is connected with a lens bracket, the other end of the driving rod is connected with a pneumatic piston, the pneumatic piston is arranged in an inner cavity of the driving element, and driving liquid is arranged in the inner cavity of the driving element;
an anti-shake spring is connected between the pneumatic piston and the outer end of the driving element;
the optical anti-shake driving component further comprises a backflow pressure relief cavity, the backflow pressure relief cavity is arranged on one side of the cavity of the driving original, a backflow port and a pressure relief opening are formed in the side wall of the cavity of the driving original, the backflow port and the pressure relief opening are arranged between the backflow pressure relief cavity and the cavity of the driving original, the backflow pressure relief cavity is communicated with the inner cavity of the driving original through the backflow port and the pressure relief opening, and a pressure valve is arranged on the pressure relief opening;
during initial state, be the negative pressure state in the driving original paper, at this moment, anti-shake spring is in compression state, and the heater is continuous to work, and the steam that produces makes driving original paper internal pressure rise, and the volume and the speed that gaseous entering backward flow pressure release cavity after the drive liquid gasification in the driving original paper are controlled to the degree of opening and shutting through control pressure valve, through the change to the internal air pressure of driving original paper, realize the removal of quick speed adjusting pneumatic piston in the inner chamber of driving original paper, and then the flexible and the diastole of drive anti-shake spring can obtain bigger driving force under the condition that keeps the high frequency.
2. The optical anti-shake apparatus according to claim 1, wherein the return port is provided with a capillary return tube.
3. The optical anti-shake apparatus according to claim 1, wherein the pressure valve comprises a valve plate, a valve air hole, a spring driving plate and an SMA spring, the valve plate is disposed on the pressure relief opening, the valve air hole is disposed on the valve plate, the spring driving plate is disposed at one end of the valve plate, and the SMA spring is connected with the spring driving plate.
4. The optical anti-shake device according to claim 1, wherein a liquid collecting inclined plane is arranged at the top of the inner cavity of the backflow pressure relief cavity, and the low-level end of the liquid collecting inclined plane is arranged above the backflow port;
a partition plate is arranged between the pressure relief opening and the reflux opening, and a gap is reserved between the partition plate and the liquid collecting inclined plane; after the driving liquid in the inner cavity of the driving element is partially gasified after being heated, gas enters the backflow pressure relief cavity from the inner cavity of the driving element through the pressure relief opening, the gas rises to the liquid collecting inclined surface at the top, is condensed on the liquid collecting inclined surface, slides into the backflow opening along the liquid collecting inclined surface, and flows back to the inner cavity of the driving element through the backflow opening.
5. The optical anti-shake device according to claim 1, wherein heat dissipation fins and a heat preservation sleeve are arranged outside the backflow pressure relief cavity, the heat dissipation fins are arranged on the side wall of the backflow pressure relief cavity on one side of the backflow port, and the heat preservation sleeve is arranged on the side wall of the backflow pressure relief cavity on one side of the pressure relief port.
6. The optical anti-shake apparatus according to claim 1, wherein the number of the optical anti-shake driving parts is 4 or 6.
7. The optical anti-shake apparatus according to claim 1, wherein the lens holder is provided with a lens mounting hole in the center, and sliding grooves are arranged around the lens holder, the number of the sliding grooves is the same as the number of the driving rods, the optical lenses are arranged in the lens mounting holes of the lens holder in a one-to-one correspondence manner, and the driving rods are arranged in the corresponding sliding grooves and can slide along the sliding grooves.
8. The optical anti-shake device according to claim 1, wherein the micro-heater comprises a micro-heater heat insulation layer and a micro-heater heating wire, the micro-heater heat insulation layer is sleeved on the outer ring of the driving element, the micro-heater heating wire is arranged between the inner ring of the micro-heater heat insulation layer and the outer ring of the driving element, a micro-heater notch is arranged on the micro-heater heat insulation layer, and a backflow pressure release cavity on the driving element penetrates out of the micro-heater notch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310529084.7A CN116243537B (en) | 2023-05-11 | 2023-05-11 | Optical anti-shake device |
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| CN202310529084.7A CN116243537B (en) | 2023-05-11 | 2023-05-11 | Optical anti-shake device |
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| CN116243537B true CN116243537B (en) | 2023-07-25 |
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| US7646544B2 (en) * | 2005-05-14 | 2010-01-12 | Batchko Robert G | Fluidic optical devices |
| TW453406U (en) * | 2000-10-23 | 2001-09-01 | Shiu Kuen Shan | Combination of pneumatic hydraulic pump |
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| CN112073621B (en) * | 2020-09-25 | 2022-04-05 | 维沃移动通信有限公司 | Camera module and electronic equipment |
| KR20220045276A (en) * | 2020-10-05 | 2022-04-12 | 엘지이노텍 주식회사 | Camera module and potable device |
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