CN107991749B - Focusing mechanism and lens suitable for same - Google Patents
Focusing mechanism and lens suitable for same Download PDFInfo
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- CN107991749B CN107991749B CN201610947695.3A CN201610947695A CN107991749B CN 107991749 B CN107991749 B CN 107991749B CN 201610947695 A CN201610947695 A CN 201610947695A CN 107991749 B CN107991749 B CN 107991749B
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- groove
- lens
- focusing
- auxiliary positioning
- assembly
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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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- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
The invention discloses a focusing mechanism and a lens suitable for the same. The focusing barrel piece is rotatably sleeved on the lens component and provided with at least one groove, and the groove is provided with a side wall. Each auxiliary positioning assembly comprises a lantern ring and a fixing piece, wherein the lantern ring is arranged on the groove and the lens assembly, the lantern ring is partially matched with the side wall of the groove, and the fixing piece penetrates through the lantern ring and is fixedly arranged on the lens assembly. When the focusing barrel part rotates, the auxiliary positioning assembly moves relative to the focusing barrel part along the groove, so that the lens assembly is driven to focus. By arranging the auxiliary positioning assembly matched with the side wall of the groove, the abrasion of the groove is reduced, and meanwhile, the precision and the stability of lens focusing are improved, so that the effect of improving the imaging quality is achieved.
Description
Technical Field
The present invention relates to a focusing mechanism, and more particularly to a focusing mechanism with an auxiliary positioning assembly and a lens using the same.
Background
In products having a lens such as a projector and a camera, it is often necessary to zoom the lens magnification to adjust the focal length. In the prior art, rollers (rollers) are disposed in grooves on a lens housing, and the rollers cooperate with each other to guide and drive a lens to extend and retract and focus, wherein the grooves have different processing characteristics due to the use of different materials.
Generally, in the testing stage, metal trenches are used for testing for precision and stability. In the mass production stage, the plasticizing groove is generally used instead, so that the overall weight of the lens is reduced, and the production cost is reduced.
However, because the plasticizing groove is made of plastic, the hardness of the plasticizing groove is low, and the roller is easy to wear when moving in the groove. In addition, when plastic is subjected to injection molding, demolding and releasing can be carried out only by the film pulling angle, and the shape of the groove caused by the film pulling angle can be in contact friction with the roller, so that the groove is easy to deform due to abrasion, and the lens is easy to shake or tilt during focusing, thereby affecting the imaging quality.
Therefore, how to develop a focusing mechanism and a lens suitable for the focusing mechanism is different from the conventional focusing mechanism, so as to improve the problems and disadvantages in the prior art, reduce the abrasion of the roller caused by the movement of the groove, and increase the precision and stability of focusing so as to achieve the effect of improving the imaging quality.
Disclosure of Invention
It is therefore an objective of the claimed invention to provide a focusing mechanism and a lens barrel suitable for the same, which can solve and improve the problems and disadvantages of the prior art.
Another objective of the present invention is to provide a focusing mechanism and a lens using the same, in which an auxiliary positioning assembly is disposed to match with a sidewall of a groove, so as to reduce wear of the groove, make the groove less prone to deformation, and improve stability of the auxiliary positioning assembly in movement of the groove.
Another objective of the present invention is to provide a focusing mechanism and a lens using the same, in which the auxiliary positioning assembly is in surface contact with the groove of the focusing barrel, so as to increase the precision and stability of lens focusing, thereby improving the imaging quality.
In order to achieve the above object, a preferred embodiment of the present invention is a focusing mechanism for a lens module, the focusing mechanism comprising: the focusing cylinder piece is rotatably sleeved on the lens component and is provided with at least one groove, and the groove is provided with a side wall; and at least one auxiliary positioning assembly, wherein each auxiliary positioning assembly comprises: a lantern ring, which is arranged in the groove and the lens component and is partially matched with the side wall of the groove; the fixing piece penetrates through the lantern ring and is fixedly arranged on the lens component; when the focusing cylinder piece rotates, the auxiliary positioning assembly moves relative to the focusing cylinder piece along the groove, so that the lens assembly is driven to focus.
To achieve the above object, another preferred embodiment of the present invention is a lens barrel, including: a lens assembly including a lens and a housing, wherein the housing is sleeved on the lens; and a focusing mechanism comprising: the focusing cylinder piece is rotatably sleeved on the shell and provided with at least one groove, and the groove is provided with a side wall; and at least one auxiliary positioning assembly, wherein each auxiliary positioning assembly comprises: a lantern ring, which is arranged in the groove and the shell and is partially matched with the side wall of the groove; the fixing piece penetrates through the lantern ring and is fixedly arranged on the lens; when the focusing cylinder piece rotates, the auxiliary positioning assembly moves relative to the focusing cylinder piece along the groove, so that the lens assembly is driven to focus.
Drawings
Fig. 1 is a schematic structural diagram of a focusing mechanism and a lens using the same according to a preferred embodiment of the invention.
Fig. 2 is a detailed structural diagram of the focusing mechanism shown in fig. 1.
FIG. 3 shows a cross-sectional view of the focusing mechanism shown in FIG. 2.
Wherein the reference numerals
1: focusing mechanism
2: lens assembly
20: lens and lens assembly
21: shell body
210: longitudinal groove
3: focusing barrel
30: groove
4: auxiliary positioning assembly
40: lantern ring
400: head part
401: extension part
41: fixing piece
L1: width of inner diameter groove
L2: width of outer diameter groove
H: perforation
S: peripheral surface
W: side wall
P1: first location of attachment
P2: second positioning point
Detailed Description
Some exemplary embodiments that embody features and advantages of the invention will be described in detail in the description that follows. It is to be understood that the invention is capable of modification in various respects, all without departing from the scope of the invention, and that the description and drawings are to be regarded as illustrative in nature, and not as restrictive.
Referring to fig. 1, fig. 2 and fig. 3, wherein fig. 1 shows a structural schematic diagram of a focusing mechanism and a lens suitable for the focusing mechanism according to a preferred embodiment of the invention, fig. 2 shows a detailed structural schematic diagram of the focusing mechanism shown in fig. 1, and fig. 3 shows a cross-sectional view of the focusing mechanism shown in fig. 2. As shown in fig. 1, 2 and 3, the focusing mechanism 1 of the lens barrel of the present invention is suitable for adjusting a lens assembly 2, and the focusing mechanism 1 includes a focusing barrel 3 and at least one auxiliary positioning assembly 4, wherein the lens assembly 2 is, for example but not limited to, a lens assembly for a projector or a camera, and the auxiliary positioning assembly is, for example but not limited to, a roller assembly.
According to the present invention, the focus cylinder 3 is rotatably sleeved on the lens assembly 2, and the focus cylinder 3 has at least one groove 30, and the groove 30 has a sidewall W. Each auxiliary positioning assembly 4 includes a collar 40 and a fixing member 41, wherein the collar 40 is disposed on the groove 30 and the lens assembly 2, the collar 40 partially matches with the sidewall W of the groove 30, and the fixing member 41 is disposed through the collar 40 and is fixedly disposed on the lens assembly 2. Thereby, the collar 40 is firmly fixed.
When the focusing cylinder 3 rotates, the auxiliary positioning assembly 4 moves along the groove 30 relative to the focusing cylinder 3, so that the lens assembly 2 is driven to focus. For example, when the focusing barrel 3 rotates, the auxiliary positioning element 4 reciprocates along the groove 30 between the first positioning point P1 and the second positioning point P2 relative to the focusing barrel 3, so that the lens assembly 2 is driven to extend and contract for focusing. And because the auxiliary positioning component 4 is fixedly arranged on the lens component 2, the auxiliary positioning component moves along the groove 30 relative to the focusing cylinder 3 and does not rotate due to the rotation of the focusing cylinder 3.
In some embodiments, the auxiliary positioning element 4 is disposed in the groove 3 and is fixed to the lens element 2, wherein the auxiliary positioning element is fixed to the lens element 2 by, for example, embedding or penetrating, but not limited thereto. And the collar 40 may be, for example, a roller and the fastener 41 may be, for example, a bolt, but not limited thereto.
According to the concept of the present invention, the collar 40 further includes a head portion 400 and an extension portion 401, wherein the head portion 400 has an outer circumferential surface S, the outer circumferential surface S matches with the sidewall W of the groove 30, the extension portion 401 of the collar 40 extends from the head portion 400, and the extension portion 401 has a through hole H, wherein the fixing member 41 is fixedly disposed on the lens assembly 2 after passing through the through hole H.
In some embodiments, the outer peripheral surface S of the head 400 is a tapered surface, i.e., a surface that tapers from the head 400 to the extension 401, so as to match with and form a surface contact with the sidewall W of the groove 30. Since the focusing barrel 3 is mostly made of plastic, a draft angle is required during the processing and forming process to facilitate the mold release, so the inner diameter groove width L1 of the groove 30 is smaller than the outer diameter groove width L2, and the outer peripheral surface S of the head 400 is an inclined surface to match with the sidewall W of the groove 30 having the draft angle. In other words, as the sidewalls W of the trench 30 taper from the outside inward, the head 400 matches the tapered profile of the sidewalls W at the same angle. In other embodiments, the upper edge of the head 400 has a first circumference, and the junction of the head 400 and the extension 401 has a second circumference, wherein the first circumference is longer than the second circumference, so that the outer circumferential surface S has a tapered surface, but not limited thereto.
In other words, the invention provides a focusing mechanism, by arranging the auxiliary positioning component matched with the side wall of the groove, the auxiliary positioning component is in surface contact with the groove of the focusing barrel part, so as to reduce the abrasion of the groove, and the stability of the auxiliary positioning component when the groove moves relative to the focusing barrel part is improved, thereby achieving the effect of improving the imaging quality. It should be noted that the present invention is generally applicable to fixed focus lenses and Zoom lenses, and the focusing mechanism can be used to adjust, for example, the distance (Zoom in/out) of the lens, adjust a proper focal length, or other optical properties of the lens, such as the switching of an optical filter or an aperture (not shown), which is applicable to the adjustment of the lens with physical properties on the mechanism, and is considered by those skilled in the art according to the concept of the present invention.
According to the concept of the present invention, the lens assembly 2 further includes a lens 20 and a housing 21, wherein the housing 21 is sleeved on the lens 20, the focusing barrel 3 is rotatably sleeved on the housing 21, the collar 40 is disposed on the housing 21, and the fixing member 41 is fixedly disposed on the lens 20, so that the focusing mechanism 1 and the lens assembly 2 form a lens for a projector or a camera.
In summary, the present invention provides a lens assembly, which includes a focusing mechanism 1 and a lens assembly 2, wherein the lens assembly 2 includes a lens 20 and a housing 21, and the housing 21 is disposed on the lens 20. The focusing mechanism 1 includes a focusing barrel 3 and an auxiliary positioning assembly 4, wherein the focusing barrel 3 is rotatably sleeved on the housing 21, the focusing barrel 3 has at least one groove 30, and the groove 30 has a sidewall W. Each auxiliary positioning assembly 4 includes a collar 40 and a fixing member 41, wherein the collar 40 is disposed on the groove 30 and the housing 21, the collar 40 partially matches with the sidewall W of the groove 30, and the fixing member 41 is disposed through the collar 40 and is fixed to the lens 20. When the focusing cylinder 3 rotates, the auxiliary positioning assembly 4 moves along the groove 30 relative to the focusing cylinder 3, so that the lens assembly 2 is driven to focus.
According to the concept of the present invention, the housing 21 has at least one longitudinal groove 210 disposed corresponding to the groove 30. For example, the longitudinal groove 210 of the housing 21 is disposed along the direction in which the lens assembly 2 stretches during focusing, and the longitudinal groove 210 is adjacent to the groove 30 of the focusing barrel 3, so that the auxiliary positioning assembly 4 moves along the groove 30 and simultaneously moves along the longitudinal groove 210 to drive the lens assembly 2 to perform focusing, wherein the groove 30, the auxiliary positioning assembly 4, and the longitudinal groove 210 are disposed correspondingly, and the number of the grooves is not limited to one.
In some embodiments, the fixing member 41 is, for example, a bolt, and has a bolt head and a threaded portion, the bolt head is engaged with the head 400 of the collar 40, and the threaded portion is disposed through the through hole H and screwed with the lens 20, so that the auxiliary positioning component 4 is integrally fixed to the lens component 2, and the lens component 2 is driven to extend and retract during focusing.
In other embodiments, the groove 30 is, for example, a curved groove, and the curved groove extends along the cylindrical surface of the focusing cylinder 3. For example, the focusing barrel 3 of the focusing mechanism 1 has three grooves 30, which are evenly distributed on the barrel surface of the focusing barrel 3, for example, the barrel surface of 360 degrees is respectively disposed at intervals of 120 degrees, and the focusing mechanism 1 has three auxiliary positioning assemblies 4 respectively disposed in the three grooves 30, when the focusing barrel 3 rotates, the three auxiliary positioning assemblies 4 respectively move along the three grooves 30 relative to the focusing barrel 3, so that the lens assembly 2 is driven to focus, but not limited thereto.
In summary, the present invention provides a focusing mechanism and a lens suitable for the same, in which an auxiliary positioning assembly is disposed to match with a sidewall of a groove, so as to reduce wear of the groove, make the groove less prone to deformation, and improve stability of the auxiliary positioning assembly in movement of the groove. Moreover, the auxiliary positioning component is in surface contact with the groove of the focusing barrel part, so that the precision and stability of lens focusing are improved, and the effect of improving the imaging quality is achieved.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention, and it is intended that all such changes and modifications be included within the scope of the appended claims.
Claims (10)
1. A focusing mechanism for a lens, adapted to adjust a lens assembly, the focusing mechanism comprising:
the focusing cylinder piece is rotatably sleeved on the lens component and is provided with at least one groove, and the groove is provided with a side wall; and
at least one auxiliary positioning assembly, wherein each auxiliary positioning assembly comprises:
the lantern ring is arranged in the groove and the lens assembly and is partially matched with the side wall of the groove, the lantern ring comprises a head part and an extension part, and the outer peripheral surface of the head part is an inclined plane and is matched with the side wall of the groove so as to form surface contact; and
the fixing piece penetrates through the lantern ring and is fixedly arranged on the lens component;
when the focusing cylinder piece rotates, the auxiliary positioning assembly moves relative to the focusing cylinder piece along the groove, so that the lens assembly is driven to focus.
2. The focusing mechanism of claim 1, wherein the extension has a through hole, and wherein the fixing member is disposed through the through hole.
3. The focusing mechanism of claim 1, wherein the outer peripheral surface of the head is a tapered surface.
4. The focus mechanism of claim 1 wherein the inner diameter groove width of the groove is less than the outer diameter groove width.
5. The focusing mechanism of claim 1, wherein the lens assembly comprises a lens and a housing, the housing is disposed on the lens, the focusing barrel is rotatably disposed on the housing, the collar is disposed on the housing, and the fixing member is fixed on the lens.
6. The focusing mechanism of claim 5, wherein the housing has at least one longitudinal slot corresponding to the groove, and the auxiliary positioning member moves along the longitudinal slot when moving along the groove, so that the lens assembly is driven to focus.
7. The focusing mechanism of claim 5, wherein the fixing member is a bolt having a bolt head and a threaded portion, wherein the bolt head is engaged with the head of the collar, and the threaded portion is disposed through the through hole of the extension portion and is screwed with the lens.
8. The focusing mechanism of claim 1, wherein when the focusing barrel rotates, the auxiliary positioning assembly reciprocates between a first positioning point and a second positioning point along the groove to extend and retract the lens assembly.
9. The focus mechanism of claim 1, wherein the groove is a curved groove extending along a cylindrical surface of the focus cylinder.
10. A lens barrel characterized by comprising:
a lens assembly including a lens and a housing, wherein the housing is sleeved on the lens; and
a focus mechanism, comprising:
the focusing cylinder piece is rotatably sleeved on the shell and provided with at least one groove, and the groove is provided with a side wall; and
at least one auxiliary positioning assembly, wherein each auxiliary positioning assembly comprises:
the lantern ring is arranged in the groove and the shell, wherein the lantern ring comprises a head part and an extension part, the peripheral surface of the head part is an inclined plane and is matched with the side wall of the groove so as to form surface contact; and
the fixing piece penetrates through the lantern ring and is fixedly arranged on the lens;
when the focusing cylinder piece rotates, the auxiliary positioning assembly moves relative to the focusing cylinder piece along the groove, so that the lens assembly is driven to focus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610947695.3A CN107991749B (en) | 2016-10-26 | 2016-10-26 | Focusing mechanism and lens suitable for same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610947695.3A CN107991749B (en) | 2016-10-26 | 2016-10-26 | Focusing mechanism and lens suitable for same |
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| Publication Number | Publication Date |
|---|---|
| CN107991749A CN107991749A (en) | 2018-05-04 |
| CN107991749B true CN107991749B (en) | 2020-12-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610947695.3A Active CN107991749B (en) | 2016-10-26 | 2016-10-26 | Focusing mechanism and lens suitable for same |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109254405A (en) * | 2018-10-31 | 2019-01-22 | 深圳多哚新技术有限责任公司 | A kind of helmet optical module |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201017090Y (en) * | 2007-01-10 | 2008-02-06 | 亚洲光学股份有限公司 | Lens device |
| CN203950064U (en) * | 2014-07-04 | 2014-11-19 | 深圳银星精工科技发展有限公司 | A kind of focus adjusting mechanism of camera lens and camera lens |
| CN204613556U (en) * | 2015-04-02 | 2015-09-02 | 广州长步道光电科技有限公司 | Focusing mechanism of optical system |
| TWM521182U (en) * | 2016-02-18 | 2016-05-01 | Baso Prec Optics Ltd | Correction structure for lens and lens assembly |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6381382B2 (en) * | 2014-09-17 | 2018-08-29 | キヤノン株式会社 | Lens barrel and optical equipment |
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2016
- 2016-10-26 CN CN201610947695.3A patent/CN107991749B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201017090Y (en) * | 2007-01-10 | 2008-02-06 | 亚洲光学股份有限公司 | Lens device |
| CN203950064U (en) * | 2014-07-04 | 2014-11-19 | 深圳银星精工科技发展有限公司 | A kind of focus adjusting mechanism of camera lens and camera lens |
| CN204613556U (en) * | 2015-04-02 | 2015-09-02 | 广州长步道光电科技有限公司 | Focusing mechanism of optical system |
| TWM521182U (en) * | 2016-02-18 | 2016-05-01 | Baso Prec Optics Ltd | Correction structure for lens and lens assembly |
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| CN107991749A (en) | 2018-05-04 |
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