CN111781789A - Hydraulic focusing system and projection equipment - Google Patents
Hydraulic focusing system and projection equipment Download PDFInfo
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- CN111781789A CN111781789A CN202010790808.XA CN202010790808A CN111781789A CN 111781789 A CN111781789 A CN 111781789A CN 202010790808 A CN202010790808 A CN 202010790808A CN 111781789 A CN111781789 A CN 111781789A
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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
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/142—Adjusting of projection optics
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Abstract
The invention provides a hydraulic focusing system and projection equipment, which comprise a first hydraulic device, a second hydraulic device, a fixed cylinder, an optical lens barrel positioned in the fixed cylinder and a driving device, wherein the optical lens barrel is arranged in the fixed cylinder; the first hydraulic device is arranged in parallel with the fixed cylinder, and a first piston rod of the first hydraulic device is fixedly connected with the optical lens barrel through a connecting rod; one end of the connecting rod is fixedly connected with the first piston rod, and the other end of the connecting rod penetrates through the open slot of the fixed cylinder and is fixedly connected with the optical lens barrel; the first hydraulic device is connected with the second hydraulic device through a liquid guide pipe, and the diameter of a first hydraulic cylinder of the first hydraulic device is smaller than that of a second hydraulic cylinder of the second hydraulic device; the second piston rod is driven to move through the driving device so as to drive liquid in the second hydraulic cylinder and liquid in the first hydraulic cylinder to flow mutually, the lens barrel is adjusted through hydraulic transmission, the focusing system is simple in structure, actual adjustment is facilitated, gear box transmission gap accumulation is avoided, and adjustment accuracy of the lens barrel is improved.
Description
Technical Field
The invention relates to the technical field of lens barrel focusing, in particular to a projector hydraulic focusing system and a projector.
Background
When the projection distance of products such as a projector and the like is changed, the lens of the optical machine part needs to move back and forth to refocus so as to ensure that the projected image is clear. At present, an electric optical focusing system of a projector mostly adopts a motor acceleration and deceleration gear and then drives a lens barrel of the projector to do linear motion back and forth. The mode has a simple structure principle and mature technology, but the rotation gaps among the gears are accumulated step by step due to the adoption of multi-stage gear reduction, so that a larger movement gap exists when the terminal lens cone moves forwards and backwards, and the precision and the speed of the automatic focusing system are adversely affected. The invention provides a hydraulic focusing system, which pushes a lens barrel to move linearly through hydraulic transmission, avoids clearance accumulation generated by gear transmission in the prior art and improves focusing precision.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a hydraulic focusing system, and aims to solve the technical problem that the movement and rotation clearance is large when a lens barrel is adjusted through gear reduction in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a hydraulic focusing system comprises a first hydraulic device, a second hydraulic device, an optical lens barrel, a fixed barrel, an optical lens barrel positioned in the fixed barrel and a driving device; the first hydraulic device is arranged in parallel with the fixed cylinder, and a first piston rod of the first hydraulic device is fixedly connected with the optical lens barrel through a connecting rod; the first hydraulic device is connected with the second hydraulic device through a liquid guide pipe, and the diameter of a first hydraulic cylinder of the first hydraulic device is larger than that of a second hydraulic cylinder of the second hydraulic device; the driving device drives the second piston rod to move so as to drive the liquid in the second hydraulic cylinder and the liquid in the first hydraulic cylinder to flow through the liquid pipe.
Further, the driving device comprises a stepping motor, two synchronous pulleys and a synchronous belt wound on the two synchronous pulleys; and a fixing plate is arranged on a second piston rod of the second hydraulic cylinder and is connected with the synchronous belt.
Further, the driving device is further provided with a linear displacement sensor for detecting and recording the displacement of the second piston rod.
Furthermore, two ends of the linear displacement sensor are respectively provided with a photoelectric in-place detection switch.
Further, the connecting rod is integrally formed with the first piston rod.
Further, the step angle of the motor is 1.8 degrees, and the driver of the motor is divided into 32 sub-divisions.
Further, the volume ratio of the two ends of the piston of the first hydraulic cylinder is equal to the volume ratio of the two ends of the piston of the second hydraulic cylinder.
Further, the piston diameter of the second end hydraulic cylinder is smaller than that of the first hydraulic cylinder.
Further, the stroke of the second hydraulic cylinder is greater than the stroke of the first hydraulic cylinder.
In order to solve the above problem, the present application further provides a projection apparatus including a frame body and the above hydraulic focusing system, wherein the hydraulic focusing system is disposed in the frame body.
Has the advantages that: the invention provides a hydraulic focusing system and a projection device, compared with the prior art, the invention provides a focusing system which comprises a first hydraulic device, a second hydraulic device, an optical lens barrel, a fixed barrel, an optical lens barrel and a driving device, wherein the optical lens barrel and the driving device are positioned in the fixed barrel; the first hydraulic device is arranged in parallel with the fixed cylinder, and a first piston rod of the first hydraulic device is fixedly connected with the optical lens barrel through a connecting rod; the first hydraulic device is connected with the second hydraulic device through a liquid guide pipe, and the diameter of a first hydraulic cylinder of the first hydraulic device is larger than that of a second hydraulic cylinder of the second hydraulic device; the driving device drives the second piston rod to move so as to drive the liquid in the second hydraulic cylinder and the liquid in the first hydraulic cylinder to flow through the liquid pipe, and the driving device is used for hydraulic transmission to adjust the lens barrel.
Drawings
Fig. 1 is a schematic structural diagram of a hydraulic focusing system according to an embodiment of the present invention.
Fig. 2 is a perspective view of a part of a hydraulic focusing system according to a first embodiment of the present invention.
Fig. 3 is a perspective view of a hydraulic focusing system according to a second embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a projection apparatus provided in the present invention.
Detailed Description
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
The present invention provides a hydraulic focusing system, and the present invention will be further described in detail below in order to make the objects, technical solutions, and effects of the present invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example one
Referring to fig. 1 and 2, a hydraulic focusing system is provided. The drawings are only for explaining the structural principle of the hydraulic focusing system and are not to scale with actual products.
A hydraulic focusing system comprises a first hydraulic device 100, a second hydraulic device 200, a fixed cylinder 300 and a driving device 400; the first hydraulic device 100 is arranged in parallel with the fixed cylinder 300, and the first piston rod 101 of the first hydraulic device 100 is fixedly connected with the optical lens barrel 302 of the fixed cylinder 300 through a connecting rod 500; the connection rod may have one end 500 fixedly connected to the first piston rod 101 and the other end fixedly connected to the optical lens barrel 302 through the slot 301 of the fixed cylinder 300, it should be understood that the connection manner here is not particularly limited, and other connection manners are also included as long as the first piston rod 101 can drive the optical lens barrel 302 to move; the first hydraulic device 100 is connected with the second hydraulic device 200 through a liquid guide pipe 600, and the diameter of the first hydraulic cylinder 102 of the first hydraulic device 100 is smaller than that of the second hydraulic cylinder 202 of the second hydraulic device 200; the driving device 400 drives the second piston rod 201 to move, so as to drive the fluid in the second hydraulic cylinder 202 and the fluid in the first hydraulic cylinder 102 to flow through the fluid pipe 600. The first hydraulic device 100 is arranged in parallel with the fixed cylinder 300, and the first piston rod 101 of the first hydraulic device is fixedly connected with the optical lens barrel 302 in the fixed cylinder 300, so that the first piston rod 101 drives the optical lens barrel 302 to move when moving up and down, thereby realizing focusing, and it should be understood that a certain gap is formed between the optical lens barrel 302 and the side wall of the fixed cylinder 300, so that the optical lens barrel 302 can move up and down. The diameter of the first hydraulic cylinder 102 of the first hydraulic device 100 is smaller than the diameter of the second hydraulic cylinder 202 of the second hydraulic device 200, so that hydraulic deceleration can be realized, that is, focusing of the fixed cylinder can be more delicate and accurate, the fixed cylinder is not directly connected with the same hydraulic device, or a single hydraulic device is directly connected with the fixed cylinder for focusing, and focusing of the fixed cylinder is slower and accurate by performing hydraulic deceleration. The liquid guide tube 600 may be provided in two parts, which are respectively connected to both sides of the piston in the cylinder of the first hydraulic device 100 and the second hydraulic device 200, so that the liquid can flow in the cylinder of the first hydraulic device 100 and the second hydraulic device 200.
Further, the driving device 400 includes a stepping motor 402, two timing pulleys 406, and a timing belt 403 wound around the two timing pulleys; a fixing plate 404 is disposed on the second piston rod 201 of the second hydraulic cylinder 202, and the fixing plate 404 is connected to the timing belt 403. It should be understood that the movement of the stepping motor 402 drives the synchronous belt 403 to move up and down, the fixing plate 404 fixedly connected to the synchronous belt 403 moves, because the fixing plate 404 is fixedly connected to the second piston rod 201 of the second hydraulic cylinder 202, the second piston rod 201 of the second hydraulic cylinder 202 moves up and down in the second hydraulic cylinder 202, and further drives the liquid in the second hydraulic cylinder 202 to enter the first hydraulic cylinder 102 through the liquid pipe 600, meanwhile, the liquid in the first hydraulic cylinder 102 also enters the second hydraulic cylinder 202 through the body pipe 600, because the liquid in the first hydraulic cylinder 102 moves, the first piston rod 101 is driven to move up and down, the first piston rod 101 is fixedly connected to the optical lens barrel 302 in the fixed cylinder 300 in front of the projector optical engine 700, and at this time, the optical lens barrel 302 is driven to move up and down to achieve focusing. It should be understood that the stepper motor 402 is preferred because it allows for precise control, and it should be understood that other motors may be implemented, and not intended to limit the present application. Also, the driving device of the present application is only a specific embodiment, and it should be understood that other various structures may bring the first piston rod 101 to move up and down accurately, and all such other structures are within the protection scope of the driving device of the present application. It is noted that the specific number of timing pulleys herein is not a limitation.
Further, in order to facilitate accurate focusing on the fixed cylinder, the driving device 400 is further provided with a linear displacement sensor 408 for detecting and recording the displacement of the second piston rod. The accurate displacement of second piston rod 201 is recorded through setting up linear displacement sensor, and then calculates the liquid flow volume of learning the second pneumatic cylinder, then calculates its liquid volume that enters into first pneumatic cylinder, and then learns the displacement volume of second piston rod, can establish the relation that the adjustment volume of starting advance motor and the focusing of fixed section of thick bamboo change, and then can realize accurate focusing in making things convenient for the actual process, improves automatic focusing's precision. Specifically, the linear displacement sensor 408 is movably connected to the fixing member 409, and the other end of the linear displacement sensor is connected to the fixing plate 404.
Further, in order to facilitate the control of the linear displacement sensor 408, a photoelectric in-place detection switch 407 is respectively disposed at two ends of the linear displacement sensor. It should be understood that the number of photoelectric position detecting switches herein is not specifically limited.
Further, the connecting rod is integrally formed with the first piston rod for ease of manufacturing and to improve the tightness of the connection.
Further, preferably, the step angle of the stepping motor is 1.8 degrees, and the driver of the stepping motor is divided into 32 parts. It should be understood that the specific step angle and the driver subdivision of the stepper motor are not particularly limited and may be specifically set according to actual needs. For example, the present example uses a stepping motor with a step angle of 1.8 degrees of 28BGY30, and the motor speed: 600 rpm, (i.e., 10 rpm), subdivide the motor drive: and 32, subdivision, wherein the pulse precision is as follows: 1.8/16-0.1125 degrees, maximum moment: 70mN.M, synchronous pulley diameter: a motor end driving wheel: 10mm, driven wheel: 10mm
Preferably, the hydraulic part is used for avoiding the problem of piston death caused by the fact that two hydraulic cylinders of different models are connected in a butt joint mode and the volumes are different, and the two hydraulic cylinders need to meet the condition that the volume ratio of two ends of the piston is equal to the size parameter of the first hydraulic cylinder: piston diameter: 30mm, piston rod diameter: 12mm, piston stroke: 5mm, second hydraulic cylinder size parameter: piston diameter: 10mm, piston rod diameter: 4mm, piston stroke: 60 mm; and calculating a hydraulic reduction ratio according to the equal hydraulic product ratio: the speed reduction ratio of V input to V output, S input to S output to H output is: h, inputting: h output, which is 10.6 in this example (where V is the hydraulic volume, S is the cylinder piston area, and H is the cylinder stroke), 256 lines/60 mm of photoelectric encoder strip (i.e., linear displacement sensor). Parameter calculation response speed: input cylinder stroke of one rotation of the motor: 3.14 × 10mm ═ 31.4mm, input cylinder one-way minimum time: the time of (60mm/31.4mm rotation)/10 (rotation/second) is 0.19 second, the damping delay exists in the energy transmission from the motor to the hydraulic pressure, the damping coefficient is 2-5, and the output pulse interval of the motor is adjusted to be about 1 second in the actual one-way time. Output torque: maximum thrust of the input cylinder: (70mn.m)/(10mm/2) ═ 14N (motor output torque/capstan radius), output cylinder maximum thrust: the service life of the system is prolonged according to the performance and the use frequency of the motor, the current of the motor is adjusted to enable the actual output torque of the output cylinder to be about 50N, and the thrust required by the optical lens is designed to meet the requirements of the optical lens. It should be noted that the values of the various parameters are only for illustration and not for limitation, and may be specifically set according to actual situations, and preferably, the volume ratio of the two ends of the piston of the first hydraulic cylinder is equal to the volume ratio of the two ends of the piston of the second hydraulic cylinder, so as to reduce the phenomenon of the two hydraulic devices being stuck.
Further, the piston diameter of the second end hydraulic cylinder is smaller than the piston diameter of the first hydraulic cylinder. Therefore, decompression between the hydraulic devices can be realized, and adjustment is more accurate.
Further, the stroke of the second hydraulic cylinder is greater than the stroke of the first hydraulic cylinder. Therefore, the adjustment is more accurate, and the effect of pressure reduction can be realized to a certain degree.
Example two
Referring to fig. 3, the present invention provides. The drawings are only for explaining the structural principle of the hydraulic focusing system and are not to scale with actual products.
The hydraulic focusing system comprises an input hydraulic cylinder 3, an output hydraulic cylinder 4 connected with the input hydraulic cylinder in series, a driving device for driving a piston rod of the input hydraulic cylinder to linearly reciprocate and a position detection device 5 for detecting the moving position of the piston rod of the input hydraulic cylinder; the piston rod 41 of the output hydraulic cylinder is provided with a connecting plate 42 which is used for connecting with the lens cone 91. Here, the input cylinder 3 is another example of the first cylinder 202 of the second hydraulic device 200, and the output cylinder 4 is another example of the first cylinder 102 of the first hydraulic device 100.
The above-mentioned driving device can be realized in various ways, and a structure of the driving device is proposed herein: the driving device comprises a motor 1, two synchronous belt wheels (not visible in the view of the attached drawing), and a synchronous belt 2 wound on the two synchronous belt wheels; the piston rod of the input hydraulic cylinder is provided with a fixed plate 32, and the fixed plate 32 is connected with the synchronous belt 2. The motor is connected with one synchronous wheel, the synchronous belt is driven to move by the rotation of the motor, and the piston rod of the input hydraulic cylinder is further driven to move by the fixing plate, so that the rotation of the motor is converted into the linear motion of the piston rod of the input hydraulic cylinder.
Further, the position detecting device 5 is a linear displacement sensor, the linear displacement sensor is arranged in parallel with the input hydraulic cylinder, and the fixing plate drives the linear displacement sensor to work when moving, so that the moving position of the piston rod of the input hydraulic cylinder is detected in real time, and accordingly, the accurate adjustment of the output hydraulic cylinder on the position of the lens barrel is ensured. In practical applications, the position detecting device may be implemented by other methods such as a photoelectric encoder and a magnetic scale.
Furthermore, two ends of the linear displacement sensor 5 are respectively provided with a photoelectric in-place detection switch 6, and the setting plays a role in soft limiting, so that the piston rod of the input hydraulic cylinder can be ensured to reciprocate in a normal range.
Preferably, the motor 1 is a stepping motor, and the arrangement enables each step of the rotation of the motor to have higher precision, so that the adjustment precision of the output hydraulic cylinder to the lens barrel is further improved.
Preferably, the step angle of the motor 1 is 1.8 degrees, and the drive of the motor is subdivided into 32.
Further, in order to avoid the problem of piston lock caused by different volumes due to the fact that two hydraulic cylinders of different types are connected in parallel in practical application, the volume ratio of the two ends of the piston of the input hydraulic cylinder 3 is equal to the volume ratio of the two ends of the piston of the output hydraulic cylinder 4.
The diameter of the piston of the input end hydraulic cylinder is smaller than that of the piston of the output hydraulic cylinder, and the two hydraulic cylinders connected in series play a role in reducing speed at the output end due to the arrangement. Namely, in practical application, the piston rod of the output hydraulic cylinder can meet the requirement of required speed reduction due to the matching of the speed reduction of the motor and the speed reduction of the hydraulic cylinder. The reduction ratio of the two hydraulic cylinders connected in series is not limited and may be determined according to actual products.
Further, the stroke of the input hydraulic cylinder is larger than that of the output hydraulic cylinder.
In practical application, the hydraulic focusing system is applied to a projector, and an upper connecting plate of a piston rod of an output hydraulic cylinder is connected with a lens barrel 91 of an optical machine 90. The current of the motor is adjusted to adjust the thrust of the piston rod of the output hydraulic cylinder to a required range. The rotation of the motor is converted into the linear motion of the piston rod of the input hydraulic cylinder through the synchronous belt, and after the hydraulic speed reduction, the linear reciprocating motion of the piston rod of the output hydraulic cylinder can drive the lens cone to linearly move, so that the focusing is realized. The lens barrel 91 is an example of the fixed barrel 300.
Through the analysis, compared with the prior art, the hydraulic focusing system provided by the invention has the advantages that the driving device, the input hydraulic cylinder, the output hydraulic cylinder and other components are arranged, the rotation of the motor is converted into hydraulic transmission to adjust the lens barrel, the structure is simple, the actual adjustment is convenient, the gear transmission is avoided as in the traditional technology, the gear transmission gap accumulation is avoided, and the adjustment precision of the lens barrel is improved.
It should be noted that, for the convenience of understanding, the optical engine 90 and the lens barrel 91 of the projector are schematically shown in the drawings, where the lens barrel 91 is an example of a fixed barrel, and it should be understood that structures capable of fixing the optical lens barrel 302 therein and allowing the optical lens barrel 302 to move therein are included, and the specific shape and structure are not limited. But the specific structure of the light engine and the lens barrel of the projector does not constitute a protection limitation. In addition, the invention claims the hydraulic focusing system, and the hydraulic focusing system is not limited to be only applied to focusing of a projector, and even if the hydraulic focusing system is applied to lens barrel adjustment of other products, the invention also falls into the protection scope of the invention.
EXAMPLE III
In order to solve the above problem, the present application further provides a projection apparatus, as shown in fig. 4, including a frame body and the above hydraulic focusing system 30000, where the hydraulic focusing system is disposed in the frame body. Specifically, for the convenience of carrying out the structural setting, can understand the liquid in the hydraulic pressure focusing system, can set up first hydraulic means and second hydraulic means in the hydraulic pressure focusing system respectively in the both sides of ray apparatus, can generate heat to the ray apparatus here to a certain extent and dispel the heat.
In the description herein, references to the term "an embodiment" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single technical solution, and such description is for clarity only, and those skilled in the art should take the description as a whole, and the technical solutions in the embodiments may be appropriately combined to form other embodiments that may be understood by those skilled in the art.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the protective scope of the present invention.
Claims (10)
1. A hydraulic focusing system is characterized by comprising a first hydraulic device, a second hydraulic device, an optical lens barrel, a fixed barrel, an optical lens barrel positioned in the fixed barrel and a driving device; the first hydraulic device is arranged in parallel with the fixed cylinder, and a first piston rod of the first hydraulic device is fixedly connected with the optical lens barrel through a connecting rod; one end of the connecting rod is fixedly connected with the first piston rod, and the other end of the connecting rod penetrates through the open slot of the fixed cylinder and is fixedly connected with the optical lens barrel; the first hydraulic device is connected with the second hydraulic device through a liquid guide pipe, and the diameter of a first hydraulic cylinder of the first hydraulic device is larger than that of a second hydraulic cylinder of the second hydraulic device; the driving device drives the second piston rod to move so as to drive the liquid in the second hydraulic cylinder and the liquid in the first hydraulic cylinder to flow through the liquid pipe.
2. The hydraulic focusing system of claim 1 wherein the drive means comprises a stepper motor, two synchronous pulleys, and a synchronous belt trained around the two synchronous pulleys; and a fixing plate is arranged on a second piston rod of the second hydraulic cylinder and is connected with the synchronous belt.
3. The hydraulic focusing system of claim 2, wherein the drive means is further provided with a linear displacement sensor for detecting and registering the displacement of the second piston rod.
4. The hydraulic focusing system of claim 3, wherein a photoelectric in-place detection switch is disposed at each end of the linear displacement sensor.
5. The hydraulic focusing system of claim 1, wherein the connecting rod is integrally formed with the first piston rod.
6. The hydraulic focusing system of claim 1 wherein the motor has a step angle of 1.8 degrees and the motor drive is subdivided by 32.
7. The hydraulic focusing system of claim 1, wherein the ratio of the volumes across the piston of the first hydraulic cylinder is equal to the ratio of the volumes across the piston of the second hydraulic cylinder.
8. The hydraulic focusing system of claim 7 wherein the piston diameter of the second end hydraulic cylinder is smaller than the piston diameter of the first hydraulic cylinder.
9. The hydraulic focusing system of claim 8, wherein the stroke of the second hydraulic cylinder is greater than the stroke of the first hydraulic cylinder.
10. A projection apparatus comprising a frame body and the hydraulic focusing system of any one of claims 1-9, the hydraulic focusing system being disposed within the frame body.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010790808.XA CN111781789A (en) | 2020-08-07 | 2020-08-07 | Hydraulic focusing system and projection equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010790808.XA CN111781789A (en) | 2020-08-07 | 2020-08-07 | Hydraulic focusing system and projection equipment |
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| CN111781789A true CN111781789A (en) | 2020-10-16 |
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| CN2763853Y (en) * | 2004-12-30 | 2006-03-08 | 鸿富锦精密工业（深圳）有限公司 | Automatic focusing device |
| CN101131458A (en) * | 2006-08-22 | 2008-02-27 | 华硕电脑股份有限公司 | Lens module |
| CN207096541U (en) * | 2017-08-02 | 2018-03-13 | 上海兆熠电子科技有限公司 | A kind of mobile controller for optical lens |
| CN207952925U (en) * | 2018-03-20 | 2018-10-12 | 上海维宏电子科技股份有限公司 | semi-automatic focusing laser head |
| CN110109242A (en) * | 2019-05-08 | 2019-08-09 | 中国科学院国家天文台南京天文光学技术研究所 | Hydraulic trussing for primary mirror of astronomical telescope |
| CN210431586U (en) * | 2019-10-08 | 2020-04-28 | 珠海格力电器股份有限公司 | Terminal and focal length adjusting device and camera device thereof |
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2020
- 2020-08-07 CN CN202010790808.XA patent/CN111781789A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2763853Y (en) * | 2004-12-30 | 2006-03-08 | 鸿富锦精密工业（深圳）有限公司 | Automatic focusing device |
| CN101131458A (en) * | 2006-08-22 | 2008-02-27 | 华硕电脑股份有限公司 | Lens module |
| CN207096541U (en) * | 2017-08-02 | 2018-03-13 | 上海兆熠电子科技有限公司 | A kind of mobile controller for optical lens |
| CN207952925U (en) * | 2018-03-20 | 2018-10-12 | 上海维宏电子科技股份有限公司 | semi-automatic focusing laser head |
| CN110109242A (en) * | 2019-05-08 | 2019-08-09 | 中国科学院国家天文台南京天文光学技术研究所 | Hydraulic trussing for primary mirror of astronomical telescope |
| CN210431586U (en) * | 2019-10-08 | 2020-04-28 | 珠海格力电器股份有限公司 | Terminal and focal length adjusting device and camera device thereof |
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Application publication date: 20201016 |
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