CN111190318A - High-precision quick automatic focusing mechanism - Google Patents
High-precision quick automatic focusing mechanism Download PDFInfo
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- CN111190318A CN111190318A CN202010106405.9A CN202010106405A CN111190318A CN 111190318 A CN111190318 A CN 111190318A CN 202010106405 A CN202010106405 A CN 202010106405A CN 111190318 A CN111190318 A CN 111190318A
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- gear
- tooth socket
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- head tooth
- seat
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- 230000007246 mechanism Effects 0.000 title claims abstract description 22
- 210000003781 tooth socket Anatomy 0.000 claims abstract description 52
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000006698 induction Effects 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
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Classifications
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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
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
- G03B13/34—Power focusing
- G03B13/36—Autofocus systems
-
- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
The invention discloses a high-precision quick automatic focusing mechanism which comprises a fixed seat, a multi-head tooth socket, a stepping motor and a gear set, wherein the fixed seat is provided with a cylinder part for accommodating a connecting lens seat, the cylinder part and the connecting lens seat are provided with axial limiting structures, the multi-head tooth socket is arranged at the port of the fixed seat cylinder part and is provided with an interface ring and a gear outer ring, the interface ring is provided with external threads and internal threads, the output end of the stepping motor is matched with the gear outer ring of the multi-head tooth socket through the gear set to output torque, when the multi-head tooth socket is driven to rotate, the external threads of the multi-head tooth socket are in threaded connection and matching with the cylinder part of the fixed seat, and the internal threads are matched with the connecting lens seat, so that the connecting lens seat linearly.
Description
Technical Field
The invention discloses a high-precision quick automatic focusing mechanism, belonging to the technical field of single-focus lens focusing mechanisms according to the classification of International Patent Classification (IPC).
Background
The existing automatic focusing lens usually passes through a gear through a motor, and then a large gear adjusting ring is rotated to drive a cam groove (three), so that the lens installed on a mechanism can carry out automatic focusing, the cam groove is designed in a spiral shape, the focusing speed is low, the return clearance is large, and the function of quick high-precision focusing cannot be met.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a high-precision quick automatic focusing mechanism, so that a lens mounted on the mechanism can be quickly and accurately focused.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a high precision fast autofocus mechanism comprising:
the fixed seat is provided with a cylinder part for accommodating and connecting the lens seat, and the cylinder part and the connecting lens seat are provided with axial limiting structures;
the multi-head tooth socket is arranged at the port of the fixed seat cylinder part, the multi-head tooth socket is provided with an interface ring and a gear outer ring, the interface ring is provided with an external connection part and an internal connection part, the external connection part is in threaded connection with the cylinder part of the fixed seat, and the internal connection part is matched with the connecting lens seat;
the output end of the stepping motor is matched with the outer ring of the gear of the multi-head tooth socket through a gear set to output torque;
when the multi-head tooth socket is driven to rotate, the external connection part of the multi-head tooth socket is matched with the barrel part of the fixing seat in a threaded connection mode, and the internal connection part is matched with the connecting lens seat at the same time, so that the connecting lens seat linearly shifts along the axial direction of the barrel part of the fixing seat under the guiding of the axial limiting structure to achieve the rapid focusing function.
Furthermore, the peripheral wall of the cylinder part of the fixed seat is provided with more than one straight groove along the axial direction, the connecting lens seat is provided with a guide nail matched with the straight groove, and the guide nail and the straight groove are matched to form an axial limiting structure.
Furthermore, the multi-head tooth socket is hollow and extends to one side to form an interface ring, the interface ring is connected with the gear outer ring through an annular body, an inner thread is arranged on the inner wall of the interface ring to form an inner connection part, an outer thread is arranged on the periphery of the interface ring to form an outer connection part, and the inner connection part and the outer connection part of the interface ring are arranged coaxially with the gear outer ring and the connecting lens base.
Furthermore, the interface ring of the multi-head tooth socket is higher than the outer ring of the gear at the outer thread side so as to facilitate the assembly of the multi-head tooth socket, the fixed seat and the connecting lens seat.
Further, the fixing base comprises a straight groove fixing base and a matched bottom plate, and the barrel part matched with the connecting lens base is arranged on the straight groove fixing base.
Furthermore, three straight flutes are arranged on the straight flute fixing seat along the peripheral side of the barrel, threads are arranged on the inner wall of the port of the barrel and matched with the external threads of the multi-head thread sleeve, and the thread part of the barrel is positioned on the outer side of the straight flutes.
Furthermore, a photoelectric switch is arranged on the fixing seat and is arranged on one side of the multi-head tooth socket, and an induction piece is fixed on the multi-head tooth socket and is matched with the photoelectric switch.
Furthermore, the induction part is fixed on the multi-head tooth socket through a limiting nail, the limiting nail penetrates through the back of the multi-head tooth socket to be matched with a circumferential limiting groove of the straight groove fixing seat, and the circumferential limiting groove is formed in the outer edge of the port of the barrel body.
Furthermore, the gear set comprises a 1 st-stage gear and a 2 nd-stage gear, the 1 st-stage gear and the 2 nd-stage gear respectively comprise a large gear and a small gear which are coaxial, a large gear in the 1 st-stage gear is matched with a gear at the output end of the stepping motor, and a small gear in the 2 nd-stage gear is matched with the outer ring of the multi-head gear sleeve so as to realize high-precision torque transmission.
The invention drives the gear set by the output torque of the stepping motor, the gear set drives the multi-head tooth socket, the external connection part of the multi-head tooth socket is in threaded connection fit with the cylinder part of the fixed seat, the internal connection part is matched with the connecting lens seat, the connecting lens seat is linearly moved up and down under the guidance of the axial limiting structure, and the multi-head tooth socket has quick and accurate transmission, so that the lens can be quickly focused.
Drawings
Fig. 1 is a schematic view of an embodiment of the present invention.
Fig. 2 is a cross-sectional view of an embodiment of the present invention.
Fig. 3 is an exploded view of an embodiment of the present invention.
Fig. 4 is another exploded view of an embodiment of the present invention.
Figure 5 is a schematic view of a multi-start mouthpiece of the present invention.
FIG. 6 is a schematic view of the fixing base and the gear set of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
example (b): referring to fig. 1 to 6, a high-precision fast automatic focusing mechanism includes a fixing base 1, a multi-head tooth socket 2, a stepping motor 3 and a gear set 4, wherein the fixing base 1 has a cylinder portion 11 for accommodating a connecting lens base 5, the cylinder portion 11 and the connecting lens base 5 are configured with an axial limiting structure, the circumferential wall of the cylinder portion of the fixing base 1 is provided with more than one axial straight groove 101, the connecting lens base 5 is provided with a guide pin 6 matched with the straight groove, and the guide pin 6 is matched with the straight groove 101 to form the axial limiting structure; the multi-head tooth socket 2 is arranged at the port of the cylinder part of the fixed seat 1, the multi-head tooth socket 2 is provided with an interface ring 21 and a gear outer ring 22, the interface ring 211 is provided with an external connection part and an internal connection part, the external connection part is in threaded connection with the cylinder part of the fixed seat 1, and the internal connection part is matched with the connecting lens seat 5; the stepping motor 3 is arranged on the fixed seat 1, and the output end of the stepping motor 3 is matched with the outer gear ring 22 of the multi-head tooth socket 2 through the gear set 4 to output torque; when the multi-head tooth socket 2 is driven to rotate, the multi-head tooth socket external connection part is matched with the barrel part of the fixing base 1 in a threaded connection mode, and the internal connection part is matched with the connecting lens base 5 at the same time, so that the connecting lens base 5 linearly moves along the axial direction of the fixing base barrel part under the guiding of the axial limiting structure to achieve the rapid focusing function.
Referring to fig. 1, 2, 3, 4 and 5, the multi-head tooth socket 2 is hollow and extends to one side to form an interface ring 21, the interface ring 21 is connected with the gear outer ring 22 by an annular body, the inner wall of the interface ring 21 is provided with an internal thread 211 to form an internal connection portion, the periphery of the interface ring is provided with an external thread 212 to form an external connection portion, and the internal connection portion and the external connection portion of the interface ring 21 are coaxially arranged with the gear outer ring 22 and the connecting lens holder 5. As shown in fig. 2 and 5, the interface ring of the multi-head socket 2 is higher than the outer ring of the gear at the outer thread side so as to facilitate the assembly of the multi-head socket 2 with the fixed seat 1 and the connecting lens mount 5.
Referring to fig. 1 and 4, the fixing base 1 includes a straight-groove fixing base 12 and a bottom plate 13, the barrel 11 engaged with the lens holder 5 is disposed on the straight-groove fixing base 12, and the bottom plate 13 is provided with a square through hole engaged with a circular hole of the barrel. As shown in fig. 6, three straight grooves 101 are arranged on the straight groove fixing seat 12 along the circumference of the cylinder, the inner wall of the port of the cylinder 11 is provided with threads to match with the external threads of the multi-start tooth socket 2, and the threaded portion of the cylinder is located at the outer side of the straight groove and near the port.
Referring to fig. 1, 3, 4 and 6, the multi-head mouthpiece 2 is connected to a sensing member 8, the sensing member is L-shaped, and may be a plate or other sensing block, the fixing base, specifically, the straight-slot fixing base 12, is fixed with a photoelectric switch 7, which is a groove-type photoelectric sensor, and the photoelectric switch outputs an electrical signal through the groove of the photoelectric switch when the sensing member rotates along with the multi-head mouthpiece. The induction part 8 is fixed on the multi-head tooth socket 2 through a limiting nail 81, the limiting nail 81 penetrates through the back of the multi-head tooth socket to be matched with a circumferential limiting groove 102 of the straight groove fixing seat, and the circumferential limiting groove 102 is arranged on the outer edge of the end port of the barrel body.
The gear set 4 comprises a 1 st-stage gear, a 2 nd-stage gear and a shell 41 at the outer side, the 1 st-stage gear and the 2 nd-stage gear respectively comprise a large gear and a small gear which are coaxial, the large gear in the 1 st-stage gear is matched with the gear at the output end of the stepping motor 3, and the small gear in the 2 nd-stage gear is matched with the gear outer ring 21 of the multi-head tooth socket 2 to realize high-precision torque transmission.
The embodiment of the invention mainly comprises a multi-head tooth socket 2, a connecting lens seat 5, a guide pin 6, a straight groove fixing seat 12, a gear set 4, a bottom plate 13, a stepping motor 3 and other parts, wherein the gear set 4 is driven by the output torque of the stepping motor 3, and then the multi-head tooth socket 2 is driven by the gear set, so that the external thread of the multi-head tooth socket is matched with the straight groove fixing seat 12, the internal thread is matched with the connecting lens seat 5, the connecting lens seat 5 moves up and down linearly under the limit of the guide pin 6, and the lens can be focused quickly because the thread of the multi-head tooth socket has quick and accurate transmission.
The embodiment of the invention has the following effects:
1. the invention adopts a stepping motor 3, a reduction box (gear set), an internal and external thread structure of the multi-head tooth socket 2, and has high transmission efficiency.
2. The mode that the teeth of the outer ring of the multi-head tooth socket 2 are meshed and the inner joint and the outer joint are simultaneously adopted enables the connecting lens seat to act in a linkage way and move along a straight line, and the moving speed is high.
3. The interface ring inner connecting part and the outer connecting part of the multi-head tooth socket 2 are coaxially arranged with the gear outer ring, the connecting lens seat 5 and the fixing seat barrel, so that the structure is stable and the shock resistance is strong.
The embodiment scheme of the invention can be applied to a quick and accurate focusing mechanism of a single-focus lens, and is characterized in that the mechanism reduces the speed through a stepping motor 3 and a plurality of gear sets 4 to increase the output torque and then rotates a high-precision multi-head tooth socket, so that the lens arranged on the mechanism can be quickly and accurately focused to achieve the purpose of quick focusing under different object distances, and the structure has good structural performance under the vibration and impact resistance, can keep no defocusing and has a quick moving function.
The present invention is not limited to the above-described embodiments, and alternatives, modifications, equivalents and solutions which are designed to have the same or similar structures as or to be within the spirit and scope of the present invention are also within the scope of the present invention.
Claims (9)
1. A high-precision fast automatic focusing mechanism is characterized by comprising:
the fixed seat is provided with a cylinder part for accommodating and connecting the lens seat, and the cylinder part and the connecting lens seat are provided with axial limiting structures;
the multi-head tooth socket is arranged at the port of the fixed seat cylinder part, the multi-head tooth socket is provided with an interface ring and a gear outer ring, the interface ring is provided with an external connection part and an internal connection part, the external connection part is in threaded connection with the cylinder part of the fixed seat, and the internal connection part is matched with the connecting lens seat;
the output end of the stepping motor is matched with the outer ring of the gear of the multi-head tooth socket through a gear set to output torque;
when the multi-head tooth socket is driven to rotate, the external connection part of the multi-head tooth socket is matched with the barrel part of the fixing seat in a threaded connection mode, and the internal connection part is matched with the connecting lens seat at the same time, so that the connecting lens seat linearly shifts along the axial direction of the barrel part of the fixing seat under the guiding of the axial limiting structure to achieve the rapid focusing function.
2. A high precision fast auto-focusing mechanism according to claim 1, characterized in that: the peripheral wall of the cylinder part of the fixed seat is provided with more than one straight groove along the axial direction, the connecting lens seat is provided with a guide nail matched with the straight groove, and the guide nail and the straight groove are matched to form an axial limiting structure.
3. A high precision fast auto-focusing mechanism according to claim 1, characterized in that: the multi-head tooth socket is hollow and extends to one side to form an interface ring, the interface ring is connected with the gear outer ring through an annular body, an inner thread is arranged on the inner wall of the interface ring to form an inner connection part, an outer thread is arranged on the periphery of the interface ring to form an outer connection part, and the inner connection part, the outer connection part, the gear outer ring and the connecting lens base are arranged coaxially.
4. A high precision fast auto-focusing mechanism according to claim 3, characterized in that: the interface ring of the multi-head tooth socket is higher than the outer ring of the gear at the outer thread side so as to facilitate the assembly of the multi-head tooth socket, the fixed seat and the connecting lens seat.
5. A high precision fast auto-focusing mechanism according to claim 2, characterized in that: the fixing seat comprises a straight groove fixing seat and a matched bottom plate, and a barrel part matched with the connecting lens seat is arranged on the straight groove fixing seat.
6. A high precision fast auto-focusing mechanism according to claim 5, characterized in that: three straight flutes are arranged on the straight flute fixing seat along the peripheral side of the barrel, threads are arranged on the inner wall of the port of the barrel and are matched with the external threads of the multi-head tooth socket, and the thread part of the barrel is positioned on the outer side of the straight flute.
7. A high precision fast auto-focusing mechanism according to claim 3, characterized in that: the fixing seat is provided with a photoelectric switch which is arranged on one side of the multi-head tooth socket, and an induction piece is fixed on the multi-head tooth socket and matched with the photoelectric switch.
8. A high precision fast auto-focusing mechanism according to claim 7, characterized in that: the induction part is fixed on the multi-head tooth socket through a limiting nail, the limiting nail penetrates through the back of the multi-head tooth socket and is matched with a circumferential limiting groove of the straight groove fixing seat, and the circumferential limiting groove is formed in the outer edge of the port of the barrel body.
9. A high precision fast auto-focusing mechanism according to one of claims 1 to 8, characterized in that: the gear set comprises a 1 st-stage gear and a 2 nd-stage gear, the 1 st-stage gear and the 2 nd-stage gear respectively comprise a large gear and a small gear which are coaxial, a large gear in the 1 st-stage gear is matched with a gear at the output end of the stepping motor, and a small gear in the 2 nd-stage gear is matched with the outer ring of the multi-head gear sleeve to realize high-precision torque transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010106405.9A CN111190318A (en) | 2020-02-21 | 2020-02-21 | High-precision quick automatic focusing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010106405.9A CN111190318A (en) | 2020-02-21 | 2020-02-21 | High-precision quick automatic focusing mechanism |
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| Publication Number | Publication Date |
|---|---|
| CN111190318A true CN111190318A (en) | 2020-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010106405.9A Pending CN111190318A (en) | 2020-02-21 | 2020-02-21 | High-precision quick automatic focusing mechanism |
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| Country | Link |
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| CN (1) | CN111190318A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114265173A (en) * | 2021-11-24 | 2022-04-01 | 河北汉光重工有限责任公司 | Zooming structure with combination of spiral and cam |
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| US20080192367A1 (en) * | 2007-01-19 | 2008-08-14 | Nikon Corporation | Lens barrel and method for manufacturing the same |
| US20150286111A1 (en) * | 2014-04-07 | 2015-10-08 | Carl Zeiss Ag | Device for Adjusting a Camera Lens |
| CN206114964U (en) * | 2016-10-26 | 2017-04-19 | 南京天兴通电子科技有限公司 | Optic fibre automatic focusing mechanism |
| CN206378668U (en) * | 2016-12-15 | 2017-08-04 | 福建福特科光电股份有限公司 | The lens assembly focused on automatically is realized using fixed focus lens |
| CN206848552U (en) * | 2017-06-29 | 2018-01-05 | 佛山华永科技有限公司 | A kind of lens focusing device |
| CN207833086U (en) * | 2018-01-09 | 2018-09-07 | 杭州海康威视数字技术股份有限公司 | A kind of manual lens focusing structure and a kind of hand-held infrared photogrammetric apparatus |
| CN211293546U (en) * | 2020-02-21 | 2020-08-18 | 厦门力鼎光电股份有限公司 | High-precision quick automatic focusing mechanism |
-
2020
- 2020-02-21 CN CN202010106405.9A patent/CN111190318A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080192367A1 (en) * | 2007-01-19 | 2008-08-14 | Nikon Corporation | Lens barrel and method for manufacturing the same |
| US20150286111A1 (en) * | 2014-04-07 | 2015-10-08 | Carl Zeiss Ag | Device for Adjusting a Camera Lens |
| CN206114964U (en) * | 2016-10-26 | 2017-04-19 | 南京天兴通电子科技有限公司 | Optic fibre automatic focusing mechanism |
| CN206378668U (en) * | 2016-12-15 | 2017-08-04 | 福建福特科光电股份有限公司 | The lens assembly focused on automatically is realized using fixed focus lens |
| CN206848552U (en) * | 2017-06-29 | 2018-01-05 | 佛山华永科技有限公司 | A kind of lens focusing device |
| CN207833086U (en) * | 2018-01-09 | 2018-09-07 | 杭州海康威视数字技术股份有限公司 | A kind of manual lens focusing structure and a kind of hand-held infrared photogrammetric apparatus |
| CN211293546U (en) * | 2020-02-21 | 2020-08-18 | 厦门力鼎光电股份有限公司 | High-precision quick automatic focusing mechanism |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114265173A (en) * | 2021-11-24 | 2022-04-01 | 河北汉光重工有限责任公司 | Zooming structure with combination of spiral and cam |
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