CN109188644B - Optical zoom lens driven by VCM - Google Patents
Optical zoom lens driven by VCM Download PDFInfo
- Publication number
- CN109188644B CN109188644B CN201811382344.8A CN201811382344A CN109188644B CN 109188644 B CN109188644 B CN 109188644B CN 201811382344 A CN201811382344 A CN 201811382344A CN 109188644 B CN109188644 B CN 109188644B
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- China
- Prior art keywords
- fixed
- vcm
- fixed cylinder
- magnet
- zoom lens
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- 230000003287 optical effect Effects 0.000 title claims abstract description 24
- 230000006698 induction Effects 0.000 claims description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
- G02B7/09—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted for automatic focusing or varying magnification
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K41/00—Propulsion systems in which a rigid body is moved along a path due to dynamo-electric interaction between the body and a magnetic field travelling along the path
- H02K41/02—Linear motors; Sectional motors
- H02K41/035—DC motors; Unipolar motors
- H02K41/0352—Unipolar motors
- H02K41/0354—Lorentz force motors, e.g. voice coil motors
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Electromagnetism (AREA)
- Power Engineering (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
The invention discloses an optical zoom lens driven by a VCM (video camera), wherein a first magnetic block and a VCM motor coil are fixed on the inner side wall of a fixed cylinder, a second magnetic block is fixed on a moving component, the optical zoom lens is convenient to set, the VCM motor coil does not move along with the moving component, the optical zoom lens is convenient to electrify, the moving component does not need to be provided with an electrifying coil, the optical zoom lens is convenient to move, the optical zoom lens has outstanding substantive characteristics and remarkable progress, the magnetic pole of the end of the first magnetic block, which is close to the second magnetic block, is opposite to the magnetic pole of the end of the second magnetic block, which is close to the first magnetic block, so that a magnetic field is formed between the magnetic poles, when the VCM motor coil is electrified, the first magnetic block drives the moving component to slide forwards or backwards relative to the fixed cylinder so as to consume energy, and when the current direction flowing through the VCM motor coil is changed, the moving component correspondingly changes the moving direction.
Description
Technical Field
The present invention relates to an optical zoom lens driven by a VCM.
Background
With the rapid development of high and new technologies, the security optical zoom lens has been widely used. The stepping motor is widely applied to automatic zooming and focusing of the optical zoom lens, and the existing stepping motor driving mode has low rotating speed, high power consumption, easiness in being influenced by electromagnetic interference and noise and poor wear resistance; meanwhile, the existing position sensing mode adopts open loop control, only one position can be sensed through PI, the control precision is low, and bad phenomena such as step out and the like are easy to occur;
The optical zoom lens in the current market has poor stability, is greatly influenced by magnetic field and noise, has high energy consumption, and is easy to generate unstable phenomena such as abrasion, step-out and the like; meanwhile, the driving stroke of a VCM motor in the market is short, and the structure is short; cannot meet the increasingly strict requirements of the current customers.
In addition, in the optical zoom lens, the driving structure of the traditional VCM motor mainly cuts the magnetic induction line in the permanent magnetic field of a U-shaped magnet by one coil, converts electric energy into mechanical energy, the setting of the U-shaped magnet is inconvenient, and the coil is also inconvenient to electrify on the moving assembly.
Therefore, how to overcome the above-mentioned drawbacks has become an important issue to be solved by the person skilled in the art.
Disclosure of Invention
The invention overcomes the defects of the technology and provides an optical zoom lens driven by a VCM.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
The utility model provides an adopt VCM driven optical zoom lens, includes fixed cylinder 1, fixed cylinder 1 sliding connection has the motion subassembly 2 that can slide back and forth in fixed cylinder 1, be fixed with first magnetic path 3 and long banding position sensing magnetic sheet 4 on the lateral wall of motion subassembly 2, this long banding position sensing magnetic sheet 4 is followed motion subassembly 2 direction of motion extends, be fixed with on the inside wall of fixed cylinder 1 with first magnetic path 3 position is relative be used for driving motion subassembly 2 back and forth in fixed cylinder 1 VCM motor coil 5 and with the position sensing magnetic sheet 4 position is relative be used for detecting motion subassembly 2 position's magneto resistance sensor 6, VCM motor coil 5 is equipped with the coil groove 51 of back and forth orientation, insert in the coil groove 51 and be fixed with second magnetic path 7, the end magnetic pole that first magnetic path 3 is close to the second magnetic path 7 direction is close to the end of first magnetic path 3 direction is the opposite magnetic pole and attracts.
In the optical zoom lens driven by the VCM, the first magnetic blocks 3 are two, and are symmetrically arranged on the outer side wall of the moving assembly 2, the number of the VCM motor coils 5 on the inner side wall of the fixed cylinder 1 is two correspondingly, and the second magnetic blocks 7 are inserted and fixed in the coil grooves 51 of each VCM motor coil 5.
In the optical zoom lens driven by the VCM, the guide shaft 8 facing forward and backward is provided in the fixed barrel 1, and the moving assembly 2 is slidably mounted on the guide shaft 8.
Compared with the prior art, the invention has the beneficial effects that:
The first magnetic block and the VCM motor coil are fixed on the inner side wall of the fixed cylinder of the optical zoom lens, the second magnetic block is fixed on the moving component, the arrangement is convenient, the VCM motor coil does not move along with the moving component, the electrification is convenient, the moving component does not need to be provided with the electrification coil, the moving component is convenient to move, the optical zoom lens has outstanding substantive characteristics and remarkable improvement, the magnetic poles at the end of the first magnetic block, which is close to the second magnetic block, and the magnetic poles at the end of the second magnetic block, which is close to the first magnetic block, are opposite to each other, so that a magnetic field is formed between the first magnetic block and the second magnetic block, when the moving component slides forwards and backwards in the fixed cylinder, the magnetic field position correspondingly moves forwards and backwards in the fixed cylinder, so that the VCM motor coil fixed in the fixed cylinder cuts the magnetic field, when the VCM motor coil is electrified, the first magnetic block drives the moving component to slide forwards or slide backwards relative to the fixed cylinder to consume energy, and when the current direction flowing through the VCM motor coil is changed, the moving component correspondingly changes the moving direction; in addition, the scheme is convenient for realizing accurate detection and closed-loop adjustment of the position of the motion assembly through the arrangement of the position sensing magnetic sheet and the magneto-resistive sensor, and is favorable for accurately adjusting the position of the motion assembly according to the requirement.
Drawings
Fig. 1 is a perspective view of the present case.
Fig. 2 is one of the exploded views of the present case.
Fig. 3 is a second exploded view of the present case.
Detailed Description
The following examples are provided to illustrate the features of the present invention and other related features in further detail to facilitate understanding by those skilled in the art:
As shown in fig. 1 to 3, an optical zoom lens driven by a VCM is characterized by comprising a fixed cylinder 1, a moving assembly 2 capable of sliding back and forth in the fixed cylinder 1 is slidably connected in the fixed cylinder 1, a first magnet 3 and a long position sensing magnetic sheet 4 are fixed on the outer side wall of the moving assembly 2, the long position sensing magnetic sheet 4 extends along the moving direction of the moving assembly 2, a VCM motor coil 5 opposite to the position of the first magnet 3 and used for driving the moving assembly 2 to move back and forth in the fixed cylinder 1 and a magneto-resistive sensor 6 opposite to the position sensing magnetic sheet 4 and used for detecting the position of the moving assembly 2 are fixed on the inner side wall of the fixed cylinder 1, the VCM motor coil 5 is provided with a coil groove 51 facing back and forth, a second magnet 7 is inserted and fixed in the coil groove 51, and the end of the first magnet 3 close to the second magnet 7 is opposite to the end of the second magnet 7 close to the first magnet 3.
As described above, the first magnetic block 3 and the VCM motor coil 5 are fixed on the inner side wall of the fixed barrel 1 of the optical zoom lens, the second magnetic block 7 is fixed on the moving component 2, the arrangement is convenient, the VCM motor coil 5 does not move along with the moving component 2, the energizing is convenient, the moving component 2 does not need to be provided with an energizing coil, the moving is convenient, the substantial characteristics and the remarkable progress are achieved, the magnetic pole of the end of the first magnetic block 3 close to the direction of the second magnetic block 7 and the magnetic pole of the end of the second magnetic block 7 close to the direction of the first magnetic block 3 are opposite to each other, a magnetic field is formed between the magnetic poles, when the moving component 2 slides back and forth in the fixed barrel 1, the magnetic field position correspondingly moves back and forth in the fixed barrel 1, the relative movement enables the VCM motor coil 5 fixed in the fixed barrel 1 to cut into the magnetic field, when the VCM motor coil 5 is energized, the first magnetic block 3 drives the moving component 2 to slide forward or slide backward relative to the fixed barrel 1 to consume energy, and when the current flowing through the moving component 2 changes the corresponding direction when the moving component 5 changes; in addition, the arrangement of the position induction magnetic sheet 4 and the magnetic resistance type sensor 6 is convenient for realizing the accurate detection and closed-loop adjustment of the position of the motion assembly 2, and is beneficial to accurately adjusting the position of the motion assembly 2 according to the requirement.
As described above, in the implementation, the first magnetic blocks 3 are two, and are symmetrically disposed on the outer side wall of the moving assembly 2, and the two VCM motor coils 5 on the inner side wall of the fixed cylinder 1 are correspondingly disposed, and the second magnetic block 7 is inserted and fixed into the coil slot 51 of each VCM motor coil 5. In this way, better driving of the movement assembly 2 is facilitated.
As described above, in the embodiment, the guide shaft 8 is provided in the fixed cylinder 1 and is oriented in the front-back direction, and the moving assembly 2 is slidably mounted on the guide shaft 8.
As described above, the present disclosure protects an optical zoom lens driven by a VCM, and all technical solutions identical or similar to the present disclosure should be shown as falling within the scope of the present disclosure.
Claims (3)
1. The optical zoom lens driven by the VCM is characterized by comprising a fixed cylinder (1), wherein a moving assembly (2) capable of sliding back and forth in the fixed cylinder (1) is connected in a sliding manner in the fixed cylinder (1), a first magnet (3) and a long-strip-shaped position induction magnet sheet (4) are fixed on the outer side wall of the moving assembly (2), the long-strip-shaped position induction magnet sheet (4) extends along the moving direction of the moving assembly (2), a VCM motor coil (5) which is opposite to the position of the first magnet (3) and is used for driving the moving assembly (2) to move back and forth in the fixed cylinder (1) and a magneto-resistive sensor (6) which is opposite to the position of the position induction magnet sheet (4) and is used for detecting the position of the moving assembly (2) are fixed on the outer side wall of the moving assembly (2), a second magnet (7) is inserted and fixed in the coil groove (51), and the first magnet (3) is close to the second magnet (7) in the direction of the second magnet (7);
When the moving component (2) slides back and forth in the fixed cylinder (1), the magnetic field position correspondingly moves back and forth in the fixed cylinder (1), so that the VCM motor coil (5) fixed in the fixed cylinder (1) cuts the magnetic field, when the VCM motor coil (5) is electrified, the first magnetic block (3) drives the moving component (2) to slide forward or slide backward relative to the fixed cylinder (1) to consume energy, and when the current direction flowing through the VCM motor coil (5) is changed, the moving component (2) correspondingly changes the moving direction.
2. An optical zoom lens driven by a VCM according to claim 1, characterized in that the first magnet (3) is two, symmetrically arranged on the outer side wall of the moving assembly (2), the number of the VCM motor coils (5) on the inner side wall of the fixed cylinder (1) is two correspondingly, and the second magnet (7) is inserted and fixed in the coil slot (51) of each VCM motor coil (5).
3. An optical zoom lens driven by VCM according to claim 1 or 2, characterized in that the fixed barrel (1) is provided with a guide shaft (8) facing forward and backward, and the moving assembly (2) is slidably mounted on the guide shaft (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811382344.8A CN109188644B (en) | 2018-11-20 | 2018-11-20 | Optical zoom lens driven by VCM |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811382344.8A CN109188644B (en) | 2018-11-20 | 2018-11-20 | Optical zoom lens driven by VCM |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109188644A CN109188644A (en) | 2019-01-11 |
| CN109188644B true CN109188644B (en) | 2024-06-14 |
Family
ID=64940209
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811382344.8A Active CN109188644B (en) | 2018-11-20 | 2018-11-20 | Optical zoom lens driven by VCM |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109188644B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207424351U (en) * | 2017-12-01 | 2018-05-29 | 中山联合光电科技股份有限公司 | A kind of Zoom optic lens of VCM motor driving applied to security protection |
| CN209014795U (en) * | 2018-11-20 | 2019-06-21 | 中山联合光电科技股份有限公司 | A kind of Zoom optic lens of VCM driving |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI427350B (en) * | 2010-07-27 | 2014-02-21 | Tdk Taiwan Corp | Electromagnetic driving apparatus for lens |
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2018
- 2018-11-20 CN CN201811382344.8A patent/CN109188644B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN207424351U (en) * | 2017-12-01 | 2018-05-29 | 中山联合光电科技股份有限公司 | A kind of Zoom optic lens of VCM motor driving applied to security protection |
| CN209014795U (en) * | 2018-11-20 | 2019-06-21 | 中山联合光电科技股份有限公司 | A kind of Zoom optic lens of VCM driving |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109188644A (en) | 2019-01-11 |
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