CN202815403U - High precision projector focal length adjustment device - Google Patents
High precision projector focal length adjustment device Download PDFInfo
- Publication number
- CN202815403U CN202815403U CN201220428410.2U CN201220428410U CN202815403U CN 202815403 U CN202815403 U CN 202815403U CN 201220428410 U CN201220428410 U CN 201220428410U CN 202815403 U CN202815403 U CN 202815403U
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- Prior art keywords
- projector
- optical
- focal length
- threaded
- high precision
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Abstract
A high precision projector focal length adjustment device comprises a projector shell, an optical head shell arranged in the projector shell, an optical lens arranged in the optical head shell, a lens cover arranged on the optical head shell, a guide groove arranged in the lens cover, a guide rib arranged on the optical lens and matched with the guide groove, optical hole support rings respectively arranged on the optical head shell and the lens cover, wherein the central lines of the optical hole support rings are mutually concident, and a screw rod is relatively rotationally muffcoupled with the inner parts of the two optical hole support rings, one end of the screw rod close to the outer side of the projector shell is provided with an adjustable knob, a positioning bolt is screwed with the screw rod and composed of a circular ring with internal thread and a cylinder with external thread, the circular ring is screwed with the screw rod, and the cylinder is screwed with the screw hole on the optical lens. The high precision projector focal length adjustment device is simple in structure, artful in design, and can adjust the focal length with a high precision.
Description
Technical field
The utility model relates to a kind of focus adjuster, particularly a kind of projector focal length high precision adjusting gear.
Background technology
Projector is a kind of projection instrument, it is incident upon image on curtain or the body of wall and watches for people, and along with the raising of the development of science and technology and science and technology, people are also more and more higher to the requirement of viewing product (such as projector etc.), catch at best viewing effect.The problem that projector often runs in use is that Focussing is improper, causes the image fog of showing on the curtain, does not see, and has a strong impact on visual effect.For adjusting focal length, traditional projector by 45 degree rotate the focusing parts or about stir the focusing part and realize, but all there is the problem that stroke is short, step pitch is large in these two kinds of focus controls, adjust to accurately comparatively difficulty of desirable focal length.Therefore need now a kind of novel focus adjuster or structure that can address the above problem.
Summary of the invention
The utility model is in order to solve the existing above-mentioned deficiency of prior art, proposes a kind of simple in structurely, designs ingeniously, can realize the projector focus adjuster of high precision Focussing.
Technical solution of the present utility model is: a kind of projector focal length high precision adjusting gear, comprise projector housing 1, in projector housing 1, be provided with optical head housing 2, be provided with optical lens 3 in the optical head housing 2, it is characterized in that: be provided with camera lens body 4 on the described optical head housing 2, radially be provided with gathering sill 5 along camera lens body 4, be provided with the guiding rib 6 that matches with gathering sill 5 on the optical lens 3, be respectively arranged with unthreaded hole support ring 7 at optical head housing 2 and camera lens body 4, and the center line of these two unthreaded hole support rings 7 overlaps, at two unthreaded hole support rings, the 7 interior relatively turnable threaded rods 8 that are socketed with, threaded rod 8 is provided with adjustment knob 9 near an end in projector housing 1 outside, at threaded rod 8 pilot pin 10 that has been threaded, pilot pin 10 is by forming with the annulus 11 of internal thread with externally threaded cylinder 12, annulus 11 is threaded with threaded rod 8, and cylinder 12 is threaded with threaded hole 13 on being opened in optical lens 3.
Described gathering sill 4 is two, and is arranged on symmetrically in the camera lens body 3.
The utility model is compared with prior art, has following advantage:
The projector focus adjuster of this kind of version, it is simple in structure, design ingenious, rationally distributed, it for 45 set degree of traditional projector rotate the focusing parts, about stir that these two kinds of focusing structures of focusing part exist: stroke is short, step pitch is large, it is relatively poor to adjust precision, be difficult to obtain the preferably defective such as focus effect, design a kind of special construction that rotation is converted into translation motion, this structure can realize accurate adjustment and the inching of focal length, can obtain preferably viewing effect; And the manufacture craft of this structure is simple, and is cheap for manufacturing cost, can say that it has possessed multiple advantage, is particularly suitable for applying in the art, and its market outlook are very wide.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment optical lens.
Fig. 2 is the structural representation of the utility model embodiment optical head housing.
Fig. 3 is the structural representation of the utility model embodiment pilot pin.
Fig. 4 is the structural representation of the optical head housing of the utility model embodiment assembled state.
Fig. 5 is the structural representation of the projector housing of the utility model embodiment assembled state.
Embodiment
Below in conjunction with description of drawings embodiment of the present utility model.Such as Fig. 1, Fig. 2, Fig. 3, Fig. 4, shown in Figure 5: projector focal length high precision adjusting gear, comprise projector housing 1, be provided with structure and the equipment of optical head housing 2 and other projection support instrument work in the projector housing 1; Be provided with camera lens body 4 at optical head housing 2, along camera lens body 4 radially be provided with gathering sill 5, for make the guide effect of gathering sill 5 better, motion is smooth, the gathering sill 5 here is two, and is symmetrical arranged; Be provided with the guiding rib 6 that matches with gathering sill 5 at optical lens 3, bottom at optical head housing 2 and camera lens body 4 is respectively arranged with unthreaded hole support ring 7, the center line of these two unthreaded hole support rings 7 overlaps, also socket is supported with threaded rod 8 in two unthreaded hole support rings 7, and threaded rod 8 can be in the 7 interior rotations of unthreaded hole support ring, and the end in threaded rod 8 close projector housing 1 outsides also is provided with adjusts knob 9; At threaded rod 8 pilot pin 10 that has been threaded, this pilot pin 10 is composed of a fixed connection by annulus 11 and cylinder 12, and annulus 11 is with internal thread, cylinder 12 is with external thread, wherein annulus 11 is threaded with threaded rod 8, cylinder 12 then is threaded with threaded hole 13, and above-mentioned threaded hole 13 is opened on the optical lens 3.
The course of work of the projector focal length high precision adjusting gear of the utility model embodiment is as follows: when the needs adjusting focal length, the user can rotate the adjustment knob 9 that is exposed at projector housing 1 outside, adjust knob 9 and drive threaded rod 8 rotations, and axially under the constraint of two unthreaded hole support rings 7, can't move owing to threaded rod 8, therefore the annulus 11 that is threaded with threaded rod 8 just can be with respect to the axially-movable of threaded rod 8, be pilot pin 10 motions, and the cylinder 12 of pilot pin 10 is fixedly connected with optical lens 3, therefore realize the axial-movement of optical lens 3, in the process of optical lens 3 motions, be arranged on guiding rib 6 on optical lens 3 shells in gathering sill 5 interior slips, guarantee motion steadily, smooth.
This structure is converted into the rotation of threaded rod 8 rectilinear motion of optical lens 3, reach the purpose of adjusting focal length, and threaded rod 8 rotates a week, the displacement of corresponding optical lens 3 is very little, therefore can obtain less displacement and larger adjustment stroke, reach the purpose of accurate adjustment focal length.
Claims (2)
1. projector focal length high precision adjusting gear, comprise projector housing (1), in projector housing (1), be provided with optical head housing (2), be provided with optical lens (3) in the optical head housing (2), it is characterized in that: be provided with camera lens body (4) on the described optical head housing (2), radially be provided with gathering sill (5) along camera lens body (4), be provided with the guiding rib (6) that matches with gathering sill (5) on the optical lens (3), be respectively arranged with unthreaded hole support ring (7) at optical head housing (2) and camera lens body (4), and the center line of these two unthreaded hole support rings (7) overlaps, the relatively turnable threaded rod (8) that is socketed with in two unthreaded hole support rings (7), threaded rod (8) is provided with adjustment knob (9) near an end in projector housing (1) outside, at threaded rod (8) pilot pin (10) that has been threaded, pilot pin (10) is by forming with the annulus (11) of internal thread with externally threaded cylinder (12), annulus (11) is threaded with threaded rod (8), and cylinder (12) is threaded with threaded hole (13) on being opened in optical lens (3).
2. projector focal length high precision adjusting gear according to claim 1, it is characterized in that: described gathering sill (4) is two, and is arranged on symmetrically in the camera lens body (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220428410.2U CN202815403U (en) | 2012-08-28 | 2012-08-28 | High precision projector focal length adjustment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220428410.2U CN202815403U (en) | 2012-08-28 | 2012-08-28 | High precision projector focal length adjustment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202815403U true CN202815403U (en) | 2013-03-20 |
Family
ID=47874257
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220428410.2U Expired - Fee Related CN202815403U (en) | 2012-08-28 | 2012-08-28 | High precision projector focal length adjustment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202815403U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103955106A (en) * | 2014-04-18 | 2014-07-30 | 苏州佳世达光电有限公司 | Guide device and projecting device with same |
-
2012
- 2012-08-28 CN CN201220428410.2U patent/CN202815403U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103955106A (en) * | 2014-04-18 | 2014-07-30 | 苏州佳世达光电有限公司 | Guide device and projecting device with same |
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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: 20130320 Termination date: 20150828 |
|
| EXPY | Termination of patent right or utility model |