CN202205013U - Back focal length adjusting assembly - Google Patents
Back focal length adjusting assembly Download PDFInfo
- Publication number
- CN202205013U CN202205013U CN2011202896504U CN201120289650U CN202205013U CN 202205013 U CN202205013 U CN 202205013U CN 2011202896504 U CN2011202896504 U CN 2011202896504U CN 201120289650 U CN201120289650 U CN 201120289650U CN 202205013 U CN202205013 U CN 202205013U
- Authority
- CN
- China
- Prior art keywords
- focal length
- back focal
- inner ring
- length adjusting
- adjusting part
- 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.)
- Expired - Fee Related
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Abstract
The embodiment of the utility model discloses a back focal length adjusting assembly which comprises a front casing, an inner ring and an outer ring. The inner ring is used for arrangement of a lens on the front casing. The outer ring is bolt jointed with the inner ring and is used for tightly locking the inner ring. The inner ring is bolt jointed with the front casing. The distance of the inner ring that is screwed in the front casing is adjustable. The back focal length adjusting assembly is of a simple structure. The lens can be fixed, and meanwhile, the back focal length can be effectively adjusted. The adjusting distance of the back focal length is related to the length of the inner ring, such that the adjusting scope of the back focal length can be substantially increased.
Description
Technical field
The utility model relates to the capture apparatus technical field, relates in particular to a kind of back focal length adjusting part.
Background technology
General video camera or camera all need focusing to carry out suitable adjustment when dispatching from the factory, but some video camera is not adjusted the CCD position when dispatching from the factory, and how adjusting that camera lens is many can not blur-free imaging, just needs back Jiao of adjustment video camera.Regulate back focal length and mainly contain two kinds of methods: focal plane position is regulated in (1); (2) regulate lens location.Wherein regulate focal plane position and have following shortcoming at least: assembly is numerous, and technological requirement is high; Range of adjustment is smaller.And existing camera adjusting modular construction is complicated, regulates inconvenient.
The utility model content
The utility model embodiment technical matters to be solved is, a kind of back focal length adjusting part is provided, and it is simple in structure, and is easy to adjust.
In order to solve the problems of the technologies described above, the utility model embodiment has proposed a kind of back focal length adjusting part, comprising: fore shell be used for camera lens is installed in the inner ring on the said fore shell, said inner ring can be bolted on the said fore shell vertically movably.
Further, offer mounting groove on the said fore shell with first screw thread, said in ring outer wall be provided with said mounting groove in second screw thread of first threads engaged.
Further, also be provided with the screw that is used for location inner ring when inner ring moves into place between said fore shell and the said inner ring.
Further, said back focal length adjusting part also comprises the outer ring that is spirally connected with said inner ring, and said outer ring inwall is provided with and three screw thread of said second threads engaged so that said inner ring is locked.
Further, said first screw thread is opposite with the 3rd hand of spiral.
The back focal length adjusting part of the utility model is simple in structure, can on the basis of realizing fixed lens, effectively reach the purpose of regulating back focal length simultaneously, and the adjustable range of back focal length is relevant with the length of inner ring, can strengthen the range of adjustment of back focal length greatly.
Description of drawings
Fig. 1 is the structural representation of the back focal length adjusting part of the utility model.
Fig. 2 is the structural representation of fore shell of the back focal length adjusting part of the utility model.
Fig. 3 is the structural representation of inner ring of the back focal length adjusting part of the utility model.
Fig. 4 is the structural representation of outer ring of the back focal length adjusting part of the utility model.
Embodiment
Referring to figs. 1 through Fig. 4 the back focal length adjusting part of the utility model is carried out detailed explanation.This back focal length adjusting part as shown in the figure comprises: fore shell 1, be used for camera lens is installed to inner ring 2 and outer ring 3 on the fore shell 1.
Offer mounting groove on the fore shell 1; In mounting groove, be provided with first screw thread 11; The outer wall of inner ring 2 is provided with second screw thread 21; Through can camera lens being fixed on the fore shell 1 first screw thread 11 and cooperating of second screw thread 21, can adjusting the distance that inner ring screws in fore shell 1 through rotation inner ring 2, and then back focal length is regulated.
Also can omit outer ring 3 during practical implementation, fore shell 1 and inner ring 2 locked through screw.
The back focal length adjusting part of the utility model can effectively reach the purpose of regulating back focal length simultaneously on the basis of realizing fixed lens, it is simple in structure, the range of adjustment broad of back focal length.
The above is the embodiment of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model principle; Can also make some improvement and retouching, these improvement and retouching also are regarded as the protection domain of the utility model.
Claims (5)
1. a back focal length adjusting part is characterized in that, comprising: fore shell be used for camera lens is installed in the inner ring on the said fore shell, said inner ring can be bolted on the said fore shell vertically movably.
2. back focal length adjusting part as claimed in claim 1 is characterized in that, offers the mounting groove with first screw thread on the said fore shell, said in ring outer wall be provided with said mounting groove in second screw thread of first threads engaged.
3. back focal length adjusting part as claimed in claim 2 is characterized in that, also is provided with the screw that is used for location inner ring when inner ring moves into place between said fore shell and the said inner ring.
4. back focal length adjusting part as claimed in claim 2 is characterized in that, said back focal length adjusting part also comprises the outer ring that is spirally connected with said inner ring, and said outer ring inwall is provided with and three screw thread of said second threads engaged so that said inner ring is locked.
5. back focal length adjusting part as claimed in claim 4 is characterized in that, said first screw thread is opposite with the 3rd hand of spiral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202896504U CN202205013U (en) | 2011-08-10 | 2011-08-10 | Back focal length adjusting assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202896504U CN202205013U (en) | 2011-08-10 | 2011-08-10 | Back focal length adjusting assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202205013U true CN202205013U (en) | 2012-04-25 |
Family
ID=45969130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202896504U Expired - Fee Related CN202205013U (en) | 2011-08-10 | 2011-08-10 | Back focal length adjusting assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202205013U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI454819B (en) * | 2012-08-01 | 2014-10-01 | Hon Hai Prec Ind Co Ltd | Back focus adjustment structure of the image lens |
-
2011
- 2011-08-10 CN CN2011202896504U patent/CN202205013U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI454819B (en) * | 2012-08-01 | 2014-10-01 | Hon Hai Prec Ind Co Ltd | Back focus adjustment structure of the image lens |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120425 Termination date: 20160810 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |