CN110727076A - Focusing structure - Google Patents
Focusing structure Download PDFInfo
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- CN110727076A CN110727076A CN201910934886.XA CN201910934886A CN110727076A CN 110727076 A CN110727076 A CN 110727076A CN 201910934886 A CN201910934886 A CN 201910934886A CN 110727076 A CN110727076 A CN 110727076A
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- focusing
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- lens barrel
- lens
- linear guide
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- 230000000149 penetrating effect Effects 0.000 claims description 4
- 230000001681 protective effect Effects 0.000 claims description 2
- 238000010276 construction Methods 0.000 claims 4
- 230000007246 mechanism Effects 0.000 abstract description 9
- 230000005540 biological transmission Effects 0.000 description 11
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000006073 displacement reaction Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001012 protector Effects 0.000 description 1
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Classifications
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- 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
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
The present invention relates to a focusing structure, comprising: the lens barrel comprises a lens barrel (11), a lens frame (12) arranged in the lens barrel (11), a connecting ring (13) sleeved on the outer side of the lens barrel (11), and a focusing ring (14) connected with the connecting ring; the connecting ring (13) is connected with the spectacle frame (12); and when the focusing ring (14) is rotated, the connecting ring (13) and the lens frame (12) move back and forth together along the axial direction of the lens barrel (11). Compared with a driving cam groove focusing mode, the focusing mechanism is higher in focusing precision and better in self-locking stability.
Description
Technical Field
The present disclosure relates to focusing mechanisms, and particularly to a focusing mechanism for a lens.
Background
The lens focusing is one of the most commonly used functions of the lens, and the lens focusing realizes the linear motion of the lens barrel by manually or electrically rotating a focusing ring on the lens, so that the focusing function of the lens is realized. Most of the existing lens focusing structures are of curved groove structures, the angle of a focusing corner is generally controlled to be about 120 degrees due to the limitation of mechanical processing and material strength, and if the angle is too large, particularly metal processed parts are easy to deform. The focusing stroke is long, the focusing angle is too small, the focusing precision is influenced, and the lens is not easy to focus. In addition, most of the existing zoom lenses are automatically focused by a motor, and if the rotation angle is small, the requirement on the torque output by the motor is also large, and the service life is short.
Disclosure of Invention
The invention aims to provide a focusing structure, which solves the problem of low precision of the focusing structure.
To achieve the above object, the present invention provides a focusing structure, comprising: the lens comprises a lens barrel, a lens frame arranged in the lens barrel, a connecting ring sleeved on the outer side of the lens barrel and a focusing ring connected with the connecting ring;
the connecting ring is connected with the mirror frame;
and when the focusing ring is rotated, the connecting ring and the lens frame move back and forth together along the axial direction of the lens cone.
According to one aspect of the present invention, the lens barrel is provided with a linear guide groove penetrating through a barrel wall thereof in an axial direction of the lens barrel;
the mirror frame is connected with the connecting ring through a first connecting piece penetrating through the linear guide groove.
According to one aspect of the invention, the first connecting member is threadedly coupled at one end to the frame body and slidably coupled at the other end to the linear guide slot, and is coupled to the first mounting structure on the coupling ring.
According to one aspect of the invention, the focusing ring is sleeved outside the connecting ring, and the focusing ring is in threaded connection with the connecting ring.
According to one aspect of the invention, one end of the lens cone is provided with a limiting boss which is enlarged in the radial direction along the axial direction of the lens cone, and the other end of the lens cone is detachably connected with a fixing ring;
the focusing ring is located between the limiting boss and the fixing ring, and two ends of the focusing ring are respectively abutted against the limiting boss and the fixing ring.
According to one aspect of the invention, the first mounting structure is a through hole extending through the side wall of the connecting ring.
According to an aspect of the present invention, the linear guide grooves are provided in plurality and at equal intervals in the lens barrel, and the first mounting structures are provided in one-to-one correspondence with the linear guide grooves.
According to one aspect of the invention, a protection member is arranged at the position where the first connecting member is slidably connected with the linear guide groove;
the protecting piece and the first connecting piece are fixedly or rotatably connected with each other.
According to one aspect of the invention, the focus ring is provided with a locking member for locking its position.
According to the scheme of the invention, compared with a driven cam groove focusing mode, the focusing mechanism has higher focusing precision and better self-locking stability.
According to one scheme of the invention, only the linear guide groove is arranged on the lens cone, and the focusing ring and the connecting ring adopt a thread transmission mode, so that the shaking of the connecting ring in the focusing process is effectively avoided, and the focusing precision of the invention is ensured.
According to one scheme of the invention, the rotation angle of the focusing ring and the connecting ring is large in a transmission thread mode, 360-degree rotation can be realized, the focusing precision is higher, and especially, the displacement control in the focusing process is more accurate in a mode of converting rotation into translation through thread transmission. Meanwhile, the thread transmission direction is vertical to the focusing direction, and the thread has good self-locking performance, so that the focusing mechanism has better self-locking performance, and the stability of the position of the lens group after focusing is effectively ensured. In addition, adopt the mode of transmission screw thread to focus between focusing ring and the go-between and can make the corner grow of focusing ring, and then make its focusing moment of torsion reduce, and then make the focusing process more smooth-going, also be favorable to increasing electric drive and focusing and life-span height, stability is good.
Drawings
FIG. 1 schematically illustrates a block diagram of a focusing mechanism according to an embodiment of the present invention;
FIG. 2 schematically illustrates an exploded view of a focusing mechanism according to an embodiment of the present invention;
fig. 3 schematically shows a block diagram of a first connector according to an embodiment of the invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
In describing embodiments of the present invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship that is based on the orientation or positional relationship shown in the associated drawings, which is for convenience and simplicity of description only, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, the above-described terms should not be construed as limiting the present invention.
The present invention is described in detail below with reference to the drawings and the specific embodiments, which are not repeated herein, but the embodiments of the present invention are not limited to the following embodiments.
Referring to fig. 1 and 2, according to an embodiment of the present invention, a focus adjustment structure includes: the lens barrel comprises a lens barrel 11, a lens frame 12 arranged in the lens barrel 11, a connecting ring 13 sleeved on the outer side of the lens barrel 11, and a focusing ring 14 connected with the connecting ring. In the present embodiment, the lens frame 12, the lens barrel 11, the connection ring 13, and the focus adjustment ring 14 are coaxially provided in this order from the inside to the outside. In the present embodiment, the connection ring 13 is connected to the frame 12. The lens group can be arranged on the lens frame 12, and then the focusing ring 14 is rotated, and the connecting ring 13 and the lens frame 12 reciprocate along the axial direction of the lens barrel 11 together, so that focusing of the lens group is realized.
Referring to fig. 1 and 2, according to an embodiment of the present invention, the lens barrel 11 is provided with a linear guide groove 111 penetrating a wall of the lens barrel 11 along an axial direction of the lens barrel 11. In the present embodiment, the lens frame 12 and the connection ring 13 are connected by the first connector 21 passing through the linear guide groove 111. In the present embodiment, a first screw hole 12a is provided on the lens frame 12, and a first connector 21 has one end screwed with the first screw hole 12a on the lens frame 12 and the other end slidably connected with the linear guide groove 111, and is connected with a first mounting structure 131 on the connection ring 13. In this embodiment, due to the limiting function of the linear guide groove 111, the lens frame 12 and the connecting ring 13 connected to each other can only reciprocate along the linear direction, and the rotation of the lens frame 12 or the connecting ring 13 in the circumferential direction is avoided, so that the position adjustment of the lens frame 12 is simple, and the control of the position precision is higher.
Referring to fig. 1 and 2, according to an embodiment of the present invention, the focusing ring 14 is sleeved outside the connection ring 13, and the focusing ring 14 is in threaded connection with the connection ring 13. In the present embodiment, an internal thread 14a is provided inside the focus adjustment ring 14, and an external thread matching the internal thread 14a is provided outside the connection ring 13, so that the linear displacement of the connection ring 13 can be realized by rotating the focus adjustment ring 14 and further by screw transmission. In the present embodiment, the transmission threads (i.e., the internal threads 14a and the external threads) between the focus adjustment ring 14 and the connection ring 13 may be single-start threads or multi-start threads. Through the arrangement, the rotation angle of the focusing ring and the connecting ring is large in a transmission thread mode, 360-degree rotation can be achieved, the focusing precision can be higher, and especially, the displacement control of the focusing process of the mode of converting rotation into translation through thread transmission is more accurate. Meanwhile, the thread transmission direction is vertical to the focusing direction, and the thread has good self-locking performance, so that the focusing mechanism has better self-locking performance, and the stability of the position of the lens group after focusing is effectively ensured. In addition, adopt the mode of transmission screw thread to focus between focusing ring and the go-between and can make the corner grow of focusing ring, and then make its focusing moment of torsion reduce, and then make the focusing process more smooth-going.
Referring to fig. 1 and 2, according to an embodiment of the present invention, in the axial direction of the lens barrel 11, one end of the lens barrel 11 is provided with a radially enlarged limit boss 112, and the other end is detachably connected with a fixing ring 113. In the present embodiment, the focus ring 14 is located between the limit boss 112 and the fixing ring 113, and both ends of the focus ring 14 respectively abut against the limit boss 112 and the fixing ring 113. Through the arrangement, the axial movement of the focusing ring 14 can be effectively inhibited, and further, the adjustment of linear displacement is realized when the connecting ring 13 and the focusing ring rotate relatively. Further, with the above arrangement, it is advantageous to limit the position of the focus ring 14 for securing the focusing accuracy of the focusing mechanism of the present invention.
Referring to fig. 1 and 2, according to one embodiment of the present invention, the first mounting structure 131 is a through hole extending through the sidewall of the connection ring 13. In the present embodiment, the first mounting structure 131 and the first connecting member 21 are coaxially connected to each other. The first mounting structure 131 is provided with a through hole, which is easy to process and easy to ensure precision, and is further advantageous for ensuring the focusing precision of the present invention.
Referring to fig. 1 and 2, according to an embodiment of the present invention, the linear guide grooves 111 are provided in plurality and at equal intervals on the lens barrel 11, and the first mounting structures 131 are provided in one-to-one correspondence with the linear guide grooves 111. In this embodiment, the plurality of linear guide grooves 111 are provided to facilitate uniform stress on the lens frame 12 during focusing, so that it is ensured that the focal plane of the lens mounted on the lens frame 12 is always perpendicular to the optical axis during focusing, which is beneficial to image quality.
According to an embodiment of the present invention, a protecting member 21a is provided at a position where the first link 21 is slidably coupled to the linear guide groove 111. In the present embodiment, the protection member 21a may be a sleeve-shaped structure, which can be directly sleeved on the first connecting member 21. The height of the protector 21a may be the same as the thickness of the barrel wall of the lens barrel 11. In this embodiment. The protective element 21a and the first connecting element 21 are fixedly or rotatably connected to each other. The protection member 21a can reduce the abrasion of the surface of the connecting position of the first connecting member 21 and the linear guide groove 111, and in addition, the protection member 21a can be rotatably connected, so that the abrasion is reduced, the smoothness of the focusing process can be improved, and the focusing precision of the invention is ensured.
Referring to fig. 1 and 2, according to an embodiment of the present invention, a locking member 141 for locking a position of the focus ring 14 is provided. In this embodiment, the focus ring 14 is provided with a second threaded hole 141a for installing the locking member 141, and the second threaded hole 141a penetrates through a sidewall of the focus ring 14, so that the locking member 141 and the second threaded hole 141a are connected to each other, thereby limiting the position of the focus ring 14 after focusing, which is convenient and fast.
The foregoing is merely exemplary of particular aspects of the present invention and devices and structures not specifically described herein are understood to be those of ordinary skill in the art and are intended to be implemented in such conventional ways.
The above description is only one embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A focusing structure, comprising: the lens barrel comprises a lens barrel (11), a lens frame (12) arranged in the lens barrel (11), a connecting ring (13) sleeved on the outer side of the lens barrel (11), and a focusing ring (14) connected with the connecting ring;
the connecting ring (13) is connected with the spectacle frame (12);
and when the focusing ring (14) is rotated, the connecting ring (13) and the lens frame (12) move back and forth together along the axial direction of the lens barrel (11).
2. The focusing structure according to claim 2, wherein the lens barrel (11) is provided with a linear guide groove (111) penetrating through a barrel wall thereof in an axial direction of the lens barrel (11);
the spectacle frame (12) and the connecting ring (13) are connected by a first connecting piece (21) which passes through the linear guide groove (111).
3. A focusing construction according to claim 3, characterized in that the first attachment member (21) is screw-connected at one end to the frame (12) and at the other end to the linear guide (111) and to a first mounting structure (131) on the attachment ring (13).
4. A focusing structure according to any of claims 1-3, characterized in that the focusing ring (14) is sleeved outside the connection ring (13), and the focusing ring (14) is in threaded connection with the connection ring (13).
5. The focusing structure according to claim 4, wherein one end of the lens barrel (11) is provided with a limiting boss (112) which is enlarged in the radial direction along the axial direction of the lens barrel (11), and the other end is detachably connected with a fixing ring (113);
the focusing ring (14) is located between the limiting boss (112) and the fixing ring (113), and two ends of the focusing ring (14) are respectively abutted against the limiting boss (112) and the fixing ring (113).
6. A focusing construction according to claim 3, wherein the first mounting construction (131) is a through hole through the side wall of the attachment ring (13).
7. The focusing structure according to claim 6, wherein the linear guide grooves (111) are provided in plurality and at equal intervals in the lens barrel (11), and the first mounting structures (131) are provided in one-to-one correspondence with the linear guide grooves (111).
8. The focusing structure according to claim 6 or 7, wherein a protecting member (21a) is provided at a position where the first link (21) is slidably connected to the linear guide groove (111);
the protective element (21a) and the first connecting element (21) are fixedly or rotatably connected to one another.
9. A focusing construction according to claim 1, characterized in that the focusing ring (14) is provided with a locking member (141) for locking its position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910934886.XA CN110727076A (en) | 2019-09-29 | 2019-09-29 | Focusing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910934886.XA CN110727076A (en) | 2019-09-29 | 2019-09-29 | Focusing structure |
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| Publication Number | Publication Date |
|---|---|
| CN110727076A true CN110727076A (en) | 2020-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910934886.XA Pending CN110727076A (en) | 2019-09-29 | 2019-09-29 | Focusing structure |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101025543A (en) * | 2006-02-17 | 2007-08-29 | 鸿富锦精密工业（深圳）有限公司 | Focusing structure and digital camera module using same |
| CN202486409U (en) * | 2012-02-13 | 2012-10-10 | 中国科学院国家天文台 | Rear-end precision automatic focusing device for astronomical telescope |
| CN206848552U (en) * | 2017-06-29 | 2018-01-05 | 佛山华永科技有限公司 | A kind of lens focusing device |
| CN207586540U (en) * | 2017-12-29 | 2018-07-06 | 昆明朗特光学仪器有限公司 | A kind of telescope of stable focusing |
| CN108957677A (en) * | 2018-09-25 | 2018-12-07 | 舜宇光学(中山)有限公司 | Power zoom device |
| CN110262055A (en) * | 2019-05-24 | 2019-09-20 | 深圳奥比中光科技有限公司 | Projective module group, depth camera and the method for adjusting projective module group focal length |
| CN211014795U (en) * | 2019-09-29 | 2020-07-14 | 舜宇光学(中山)有限公司 | Focusing structure |
-
2019
- 2019-09-29 CN CN201910934886.XA patent/CN110727076A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101025543A (en) * | 2006-02-17 | 2007-08-29 | 鸿富锦精密工业（深圳）有限公司 | Focusing structure and digital camera module using same |
| CN202486409U (en) * | 2012-02-13 | 2012-10-10 | 中国科学院国家天文台 | Rear-end precision automatic focusing device for astronomical telescope |
| CN206848552U (en) * | 2017-06-29 | 2018-01-05 | 佛山华永科技有限公司 | A kind of lens focusing device |
| CN207586540U (en) * | 2017-12-29 | 2018-07-06 | 昆明朗特光学仪器有限公司 | A kind of telescope of stable focusing |
| CN108957677A (en) * | 2018-09-25 | 2018-12-07 | 舜宇光学(中山)有限公司 | Power zoom device |
| CN110262055A (en) * | 2019-05-24 | 2019-09-20 | 深圳奥比中光科技有限公司 | Projective module group, depth camera and the method for adjusting projective module group focal length |
| CN211014795U (en) * | 2019-09-29 | 2020-07-14 | 舜宇光学(中山)有限公司 | Focusing structure |
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