CN108549140A - A kind of lens focusing device - Google Patents
A kind of lens focusing device Download PDFInfo
- Publication number
- CN108549140A CN108549140A CN201810689613.9A CN201810689613A CN108549140A CN 108549140 A CN108549140 A CN 108549140A CN 201810689613 A CN201810689613 A CN 201810689613A CN 108549140 A CN108549140 A CN 108549140A
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- China
- Prior art keywords
- bolt
- focusing
- lens
- focusing ring
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 230000002093 peripheral effect Effects 0.000 claims description 8
- 238000009434 installation Methods 0.000 claims description 4
- 229920000297 Rayon Polymers 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000571 coke Substances 0.000 description 1
- 239000007787 solid Substances 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
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Structure And Mechanism Of Cameras (AREA)
Abstract
The present invention relates to field of cameras, disclose a kind of lens focusing device, to realize the purpose of accurate focusing.At least two bolts that lens focusing device includes focusing ring, is installed on the focusing ring, the end of each bolt is screwed in towards the inside of the focusing ring, and the end of at least two bolt forms the grasping part for the camera lens that image capture device can be clamped in the inside of the focusing ring.
Description
Technical field
The present invention relates to field of cameras, more particularly to a kind of lens focusing device.
Background technology
Image capture device (such as video camera) is typically equipped with the camera lens of focus adjustable section, and user can be according to usage scenario
Difference voluntarily focus, with shooting obtain clearly image.As shown in Figure 1, in the prior art, generally in the peripheral side of camera lens 01
It is arranged focusing ring 02, camera lens 01 can be driven to rotate when user rotates focusing ring 02, to reach the focal length for changing camera lens 01
Purpose.Since focusing ring 02 is directly set on camera lens 01, the size and the size of camera lens 01 of focusing ring 02 are similar, so
And for image capture devices such as industrial camera, cameras, since its Lens is smaller, according to arc length formula l=α r,
Wherein, l, α, r are respectively arc length, angle and radius, and since the radius of focusing ring 02 is smaller, user carries out one to focusing ring
By a small margin rotation (the arc length l) rotated so that focusing ring 02 drives the angle [alpha] of rotation of lens larger, i.e. user couple
Focusing ring carries out one and rotates by a small margin all to may result in that focal length variations are larger, cannot achieve and carries out the micro- of focal length to camera lens
It adjusts, focusing accuracy is relatively low.
Invention content
The purpose of the embodiment of the present invention is to provide a kind of lens focusing device, to realize the purpose of accurate focusing.
An embodiment of the present invention provides a kind of lens focusing device, including focusing ring and it is installed on the focusing ring
The end of at least two bolts, each bolt is screwed in towards the inside of the focusing ring, and the end of at least two bolt
The grasping part for the camera lens that image capture device can be clamped is formed in the inside of the focusing ring.
In a specific embodiment, the quantity of the bolt is two, and the axis of described two bolts is along same
Straight line is arranged.
In a specific embodiment, the extended line of the axis of described two bolts passes through the focusing ring respectively
Axle center.
In a specific embodiment, the quantity of the bolt is at least three, between described at least three bolt etc.
Every being distributed on the focusing ring.
In a specific embodiment, the extended line of the axis of at least three bolt passes through the focusing respectively
The axle center of ring.
In a specific embodiment, the end of each bolt is fixed with block.
In a specific embodiment, each block is fixed with rubber pad backwards to the side of bolt.
In a specific embodiment, fixed by viscose glue between block and rubber pad.
In a specific embodiment, the installation site that the bolt is corresponded on the focusing ring has towards inside
The recessed, groove for accommodating bolt head.
In a specific embodiment, the peripheral side of the focusing ring is provided with lines.
The lens focusing device provided using the embodiment of the present invention, is provided at least two bolts on focusing ring,
The end of each bolt is screwed in towards the inside of the focusing ring, and the end of at least two bolts forms the folder that camera lens can be clamped
Space is held, rotation focusing ring can drive camera lens to rotate synchronously, and achieve the purpose that the focal length for changing camera lens.The camera lens tune of the present invention
The size of the focusing ring of coke installation can be flexibly arranged, and could be provided as the size for being far longer than camera lens, according to arc length formula l=
α r, wherein l, α, r are respectively to rotate arc length, rotation angle and radius, and when rotation arc length is constant, radius is bigger, corresponding
Rotation angle is just smaller, is based on this principle, you can derives when the radius of focusing ring is larger, user rotates focusing ring same
Radian its drive rotation of lens rotation angle it is smaller, i.e., compared with prior art, user to the present invention lens focusing fill
The focusing ring set carries out the rotation process of same magnitude, focusing ring band provided by the invention with the focusing ring provided the prior art
The angle smaller of dynamic rotation of lens, i.e. user are by may be implemented the fine tuning of focusing ring the fine tuning of focal length, focusing accuracy higher.
In addition, the image that lens focusing device provided in an embodiment of the present invention can be applied to a variety of camera lenses with different specification size is adopted
Collect in equipment, practicability is higher.
Description of the drawings
Fig. 1 is the structural schematic diagram of prior art focusing ring；
Fig. 2 is one of the structural schematic diagram of lens focusing device of the embodiment of the present invention；
Fig. 3 is the second structural representation of lens focusing device of the embodiment of the present invention.
Specific implementation mode
To realize the purpose of exact focus, an embodiment of the present invention provides a kind of lens focusing devices.To make the present invention's
Purpose, technical scheme and advantage are clearer, and invention is further described in detail by the following examples.
Lens focusing device provided in an embodiment of the present invention, including focusing ring, at least two spiral shells that are installed on focusing ring
The end of bolt, each bolt is screwed in towards the inside of focusing ring, and the end of at least two bolts is formed in the inside of focusing ring
The grasping part of the camera lens of image capture device can be clamped.
In the embodiment of the present invention, the quantity of the bolt in lens focusing device can be flexibly arranged according to actual demand, example
Two are such as could be provided as, may be set to be three, as shown in Fig. 2, lens focusing device includes two bolts, such as Fig. 3 institutes
Show that lens focusing device includes three bolts.It is detailed to be carried out for the structure of Fig. 2 and lens focusing device shown in Fig. 3 below
Thin description, the structure of the lens focusing device of other quantity bolt are similarly no longer described in detail one by one.
Lens focusing device as shown in Figure 2 and Figure 3, including focusing ring 10, at least two spiral shells that are installed on focusing ring 10
The end of bolt 20, each bolt 20 is screwed in towards the inside of focusing ring 10, and the end of at least two bolts 20 is in focusing ring 10
Inside formed can be clamped image capture device camera lens 30 grasping part.
In the embodiment of the present invention, considered critical is not done to the concrete type of image capture device, model, structure, such as can
Think common camera, industrial camera etc..
Preferably, when the quantity of bolt 20 is two, the axis of two bolts 20 is arranged along same straight line, in this way may be used
The opposite abutting force in direction is applied to the camera lens 30 between the end of two bolts 20, to by camera lens 30 be held on this two
In the grasping part that the end of a bolt 20 is formed.Also, the grasping part and focusing ring that the end of two bolts 20 is formed
10 can both be arranged concentrically, also eccentric setting, when grasping part is arranged concentrically with focusing ring 10, can further increase focusing
Precision needs the extended line for meeting the axis of two bolts 20 to pass through the axle center of focusing ring 10, and two bolts respectively at this time
The length of 20 screw-in focusing ring, 10 inside should be consistent.
When the quantity of bolt 20 is three or more, multiple bolts 20 can be spacedly distributed on focusing ring 10, also may be used
It is distributed on focusing ring 10 with unequal interval, as long as the grasping part that the end of multiple bolt 20 is constituted can clamp camera lens 30
.Preferably, to make 30 uniform force of camera lens, more firm, in the embodiment of the present invention, multiple bolts 20 be spacedly distributed in
On focusing ring 10, as shown in figure 3, being uniformly distributed on focusing ring 10 there are three bolt 20, when three bolts 20 are simultaneously to camera lens 30
Camera lens 30 can be held on when applying abutting force in the grasping part that the ends of three bolts 20 is formed, and compared to adopting
The case where with two bolt 20, the program is more secured to the clamping action of camera lens 30, stablizes, and is greatly improved lens focusing dress
The use reliability set.Similarly, the grasping part that the end of multiple bolts 20 is formed can be both arranged concentrically with focusing ring 10, also may be used
Eccentric setting needs the extended line difference for meeting the axis of multiple bolts 20 when grasping part is arranged concentrically with focusing ring 10
By the axle center of focusing ring 10, and the length that multiple bolts 20 screw on the inside of focusing ring 10 should be consistent.
In addition, in order to improve the anti-skidding degree on 10 surface of focusing ring, user is set to be more prone to exert a force, in the embodiment of the present invention
In, the peripheral side of focusing ring 10 is provided with lines 70.Above-mentioned lines 70 can be the bar-shaped trough opened up along the axial direction of focusing ring 10,
Or the knurled pattern formed by annular knurl technique, details are not described herein again.
The lens focusing device provided using the embodiment of the present invention focuses to the camera lens 30 of image capture device
When, camera lens 30 is placed in the inside of focusing ring 10 first, then according to the end of at least two bolt 20 of the size adjusting of camera lens 30
The size of the grasping part formed is held specifically to need to screw bolt 20 towards the inside of focusing ring 10, make bolt 20
End push against the peripheral side of camera lens 30, so that camera lens 30 to be held in the grasping part, rotating focusing ring 10 later can
It drives camera lens 30 to rotate synchronously, achievees the purpose that the focal length for changing camera lens 30.According to arc length formula l=α r, wherein l, α, r
Respectively arc length, rotation angle and radius, when arc length is constant, radius is bigger, and corresponding rotation angle is smaller, former based on this
Reason, you can derive that the rotation angle rotated corresponding to the arc length of same length is smaller when the radius of focusing ring 10 is bigger, adjust
Pyrogene degree is also higher, thus compared with prior art in directly focusing ring is sheathed on camera lens peripheral side method, the present invention
The radius of focusing ring 10 in embodiment is significantly larger than the radius of camera lens 30, it is hereby achieved that higher focusing accuracy, in turn
Realize the purpose of exact focus.Also, due to the end of at least two bolts 20 formed grasping part size be it is adjustable,
Therefore lens focusing device provided in an embodiment of the present invention can be applied to the image of a variety of camera lenses 30 with different specification size
In collecting device, practicability is higher.
Preferably, in the embodiment of the present invention, the end of each bolt 20 is fixed with block 40, can be kept away by the way that block 40 is arranged
The end for exempting from bolt 20 directly abuts with camera lens 30 and camera lens 30 is made to cause to damage, and can increase the supporting to camera lens 30 of bolt 20
Active area is pressed, prevents 30 stress of camera lens from excessively concentrating and causing concentrated wear, as shown in Figure 3.Preferably, block 40 is backwards to spiral shell
The side of bolt 20 is fixed with rubber pad 50, can further decrease the damage to camera lens 30 in this way, and rubber pad 50 can be with
Increase the frictional force between block 40 and camera lens 30, camera lens 30 is made more to be stably attached in grasping part.Rubber pad 50 is solid
Realization method due to block 40 is unlimited, is preferably adhesively fixed in embodiments of the present invention using viscose glue.
In one particular embodiment of the present invention, the installation site that bolt 20 is corresponded on focusing ring 10 has towards inside
The recessed, groove 60 for accommodating bolt head, the depth of groove 60 is equal to or more than the length of bolt head, so that bolt
The peripheral side of non-bulging focusing ring 10.If bolt head obviously protrudes from the peripheral side of focusing ring 10, in use
It is easy to collide with the external world, and can then reduce the generation of the above situation using the embodiment of the present invention, to improve mirror
The use reliability of head focus control.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (10)
1. a kind of lens focusing device, which is characterized in that including focusing ring, at least two spiral shells being installed on the focusing ring
The end of bolt, each bolt is screwed in towards the inside of the focusing ring, and the end of at least two bolt is in the focusing
The inside of ring forms the grasping part for the camera lens that image capture device can be clamped.
2. lens focusing device as described in claim 1, which is characterized in that the quantity of the bolt is two, and described two
The axis of a bolt is arranged along same straight line.
3. lens focusing device as claimed in claim 2, which is characterized in that the extended line of the axis of described two bolts is distinguished
By the axle center of the focusing ring.
4. lens focusing device as described in claim 1, which is characterized in that the quantity of the bolt is at least three, described
At least three bolts are spacedly distributed on the focusing ring.
5. lens focusing device as claimed in claim 4, which is characterized in that the extended line of the axis of at least three bolt
Pass through the axle center of the focusing ring respectively.
6. lens focusing device as described in claim 1, which is characterized in that the end of each bolt is fixed with block.
7. lens focusing device as claimed in claim 6, which is characterized in that each block is fixed with rubber backwards to the side of bolt
Rubber cushion.
8. lens focusing device as claimed in claim 7, which is characterized in that fixed by viscose glue between block and rubber pad.
9. lens focusing device as described in claim 1, which is characterized in that correspond to the installation of the bolt on the focusing ring
Position has the recessed, groove for accommodating bolt head towards inside.
10. such as claim 1~9 any one of them lens focusing device, which is characterized in that the peripheral side of the focusing ring is set
It is equipped with lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810689613.9A CN108549140A (en) | 2018-06-28 | 2018-06-28 | A kind of lens focusing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810689613.9A CN108549140A (en) | 2018-06-28 | 2018-06-28 | A kind of lens focusing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108549140A true CN108549140A (en) | 2018-09-18 |
Family
ID=63493189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810689613.9A Pending CN108549140A (en) | 2018-06-28 | 2018-06-28 | A kind of lens focusing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108549140A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135826A (en) * | 2007-09-30 | 2008-03-05 | 无锡凯尔科技有限公司 | Universal focusing ring |
| CN101661149A (en) * | 2008-08-25 | 2010-03-03 | 佛山普立华科技有限公司 | Focusing device |
| CN207096545U (en) * | 2017-06-30 | 2018-03-13 | 群光电子(苏州)有限公司 | It is a kind of to be used for the manual focusing ring without petal camera lens |
| CN208506343U (en) * | 2018-06-28 | 2019-02-15 | 北京图森智途科技有限公司 | A kind of lens focusing device |
-
2018
- 2018-06-28 CN CN201810689613.9A patent/CN108549140A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101135826A (en) * | 2007-09-30 | 2008-03-05 | 无锡凯尔科技有限公司 | Universal focusing ring |
| CN101661149A (en) * | 2008-08-25 | 2010-03-03 | 佛山普立华科技有限公司 | Focusing device |
| CN207096545U (en) * | 2017-06-30 | 2018-03-13 | 群光电子(苏州)有限公司 | It is a kind of to be used for the manual focusing ring without petal camera lens |
| CN208506343U (en) * | 2018-06-28 | 2019-02-15 | 北京图森智途科技有限公司 | A kind of lens focusing device |
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