CN201628800U - Mini projector focusing device - Google Patents
Mini projector focusing device Download PDFInfo
- Publication number
- CN201628800U CN201628800U CN2010200565184U CN201020056518U CN201628800U CN 201628800 U CN201628800 U CN 201628800U CN 2010200565184 U CN2010200565184 U CN 2010200565184U CN 201020056518 U CN201020056518 U CN 201020056518U CN 201628800 U CN201628800 U CN 201628800U
- Authority
- CN
- China
- Prior art keywords
- focusing
- rotating shaft
- projection lens
- focus control
- backlash spring
- 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
Links
Images
Landscapes
- Lens Barrels (AREA)
Abstract
The utility model discloses a mini projector focusing device which comprises a projection lens, a focusing revolving shaft, a focusing shaft lining, an anti-backlash spring, and a fixed structure used for limiting the axial and linear motion of the focusing revolving shaft, wherein the focusing shaft lining is integrally connected with the projection lens; internal threads are designed on the inner surface of the focusing shaft lining; external threads which are matched with the focusing shaft lining to form a transmission thread pair are designed on the outer surface of the focusing revolving shaft; the anti-backlash spring is arranged on the focusing revolving shaft; the center line of the anti-backlash spring is coincident with the center line of the focusing shaft lining; and the transmission thread pair is arranged on the fixed structure used for limiting the axial and linear motion of the focusing revolving shaft. On one hand, the device ensures the precision and the stability of a focusing position, on the other hand, the device ensures that the transmission thread pair can still conduct precise and stable focusing motion under the action of the anti-backlash spring when serious abrasion or larger thread clearance is produce due to the long-time running. Furthermore, the device has the advantages of simple and convenient utilization ad operation.
Description
Technical field
The utility model relates to field of projection display, particularly a kind of being installed on the mobile projector device to realize the focus control of projecting function.
Background technology
Limited by product size and cost, some electronic products (as notebook computer, computer monitor, mobile phone, game machine etc.) with image display function all can not provide the large screen display function of viewing and admiring simultaneously for many people.For a long time, people are accustomed to adopting projector to carry out product, scheme, picture or video display, to obtain the large screen display function.Because traditional projector's volume weight is bigger, very not portable, only be fit to be fixed on office or some special place use; And this class projector costs an arm and a leg, and is difficult to be accepted by ordinary consumer, seriously limited the popular development of projector.
Minitype projection machine (also claiming pocket projector, palm projector), its size is little of can easily putting pocket into, has superpower portability, expanded the application of projector greatly at aspects such as small-sized business, home entertainings, make projector be penetrated into unapproachable market segment in the past gradually, be applied to mobile devices such as mobile phone, digital camera, notebook computer as embedding, and the portable translucent machine that uses of small-sized demonstration place, impromptu demonstration.
As the focus control of one of projector's vitals, its design success or not directly has influence on the performance of projector.At the focus control of publication, camera lens adopts the (patent publication No.: CN101093273) that is threaded with focusing ring, utilize the precision-fit of screw thread between camera lens and the focusing ring to realize focusing, but this device has no idea to solve the control thread pitch, can't guarantee that focusing system works for a long time accurately.In general, because the distortion that exists foozle, rigging error and thermal stress or loading to cause must be reserved certain interval between the screw thread that cooperatively interacts.If the gap of reserving is too little, difficulty or serious wear then can appear installing, accelerate the inefficacy of focusing system.If the gap of reserving is too big, then can cause the loosening of threaded engagement, focusing occurs and react problems such as insensitive and backlash.Usually, screw thread in use all can constantly wear and tear, and the gap between the screw thread also can be increasing.In sum, the control of projector's focusing system thread pitch is extremely important, must take measures it is controlled at zone of reasonableness.
Summary of the invention
The utility model at existing projector screw thread focus control can not fine control thread pitch present situation, a kind of simple in structure, easy to operate minitype projection machine focus control is provided, guarantee that the focusing screw thread can work for a long time accurately.
The technical scheme that its technical matters that solves the utility model adopts is: a kind of minitype projection machine focus control, the minitype projection machine focus control comprises the fixed sturcture of projection lens, focusing rotating shaft, focusing axle sleeve, backlash spring and restriction focusing rotating shaft axial linear movement, focusing axle sleeve and projection lens connect as one, and its inside surface design has internal thread; The design of focusing rotating shaft outside surface has the external thread that fits in the motion thread pair with the focusing axle sleeve; The focusing rotating shaft is provided with backlash spring, and the center line of backlash spring is arranged on the fixed sturcture of restriction focusing rotating shaft axial linear movement with the central lines of focusing rotating shaft with the axle sleeve of focusing, motion thread pair.
The technical scheme that its technical matters that solves the utility model adopts further comprises:
The centerline design of described focusing rotating shaft has through hole, is provided with a stationary shaft in the through hole, and stationary shaft is fixedly mounted on the fixed sturcture of restriction focusing rotating shaft axial linear movement, and the focusing rotating shaft can be rotated around stationary shaft.
The fixed sturcture of described restriction focusing rotating shaft axial linear movement is the stationary shaft mounting structure of design on the light engine pedestal, and described stationary shaft is interspersed to be fixed on this stationary shaft mounting structure; Described focusing rotating shaft is between this stationary shaft mounting structure.
Stationary shaft mounting structure on the described projector optical engine pedestal has the lug structure of mounting hole for design.
Also designing in the described focusing rotating shaft has focusing ring, stirs the rectilinear motion that focusing ring can become the helical motion of motion thread pair projection lens, and focusing ring connects as one with the focusing rotating shaft.
The design of described focusing ring has backlash spring empty avoiding structure, and described backlash spring is nested with on stationary shaft, and is contained in the space that backlash spring empty avoiding structure on the focusing ring and light engine pedestal stationary shaft mounting structure surrounded.
Described backlash spring is in compressive state when working.
Also design the focusing rotating shaft empty avoiding structure of the focusing amplitude of restricted focusing rotating shaft on the described light engine pedestal, be fixed with projection lens guide-localization groove on the light engine pedestal at focusing rotating shaft empty avoiding structure place, be fixed with the projection lens guide-localization structure that cooperates with projection lens guide-localization groove on the focusing axle sleeve.
Design has the projection lens installation and positioning structure and the focusing campaign of projection lens is led and spacing projection lens focusing guiding and stopper slot on the described light engine pedestal, also is provided with the projection lens focusing on the shadow shield of light engine pedestal loam cake dress and leads and position limiting structure.
The screw thread of described motion thread pair is acme thread, square thread or V-thread.
Described focusing ring comprises interior ring and the outer shroud that is sleeved on together, and interior ring connects as one with the focusing rotating shaft, and on the ring, outer shroud adopted elastomeric material to make in outer shroud was sleeved on.
The utlity model has following advantage:
1, focusing accurately steadily
Because this device installed backlash spring, compressed backlash spring produces axial thrust, makes the screw thread of focusing rotating shaft press the screw thread of the axle sleeve of focusing, and has eliminated the thread pitch between the motion thread pair.Guaranteed on the one hand the focusing position accurately and steadily, guarantee that on the other hand the motion thread pair occurs than galling or after than the major thread gap in long-time running, the motion of still can under the effect of backlash spring, accurately focusing stably of motion thread pair.
2, easy and simple to handle
The consumer can drive the focusing axle sleeve by the serration of stirring the focusing ring excircle and carry out rectilinear motion along stationary shaft, realizes the mobile focusing of projection lens at optical axis direction, uses simple to operation.
Description of drawings
Fig. 1 is the combination perspective view of a kind of embodiment of the utility model.
Fig. 2 is the exploded perspective structural representation of Fig. 1.
Fig. 3 is the front projection structural representation of Fig. 1.
Fig. 4 is the partial cutaway planar structure synoptic diagram of Fig. 3.
Fig. 5 is the perspective view of focusing rotating shaft among Fig. 1.
Fig. 6 is the perspective view of backlash spring among Fig. 1.
Fig. 7 is the perspective view of stationary shaft among Fig. 1.
Fig. 8 is the perspective view of projection lens among Fig. 1.
The sectional structure synoptic diagram of guide and limit structure when Fig. 9 is the projection lens focusing.
Figure 10 is the decomposing schematic representation that the focusing ring place splits into two parts.
Figure 11 is Figure 10 unitized construction synoptic diagram.
Among the figure, 1-light engine pedestal, 2-projection lens, the 3-rotating shaft of focusing, the 4-axle sleeve of focusing, 5-stationary shaft mounting structure, the 6-focusing ring, 7-stationary shaft, 8-backlash spring, 9-camera lens focusing guiding and stopper slot, 10-backlash spring empty avoiding structure, 11-focusing rotating shaft empty avoiding structure, ring in the 12-light shield, 13-, the 14-outer shroud, 15-projection lens guide-localization groove, 16-projection lens guide-localization structure, 17-camera lens focusing guiding and position limiting structure.
Embodiment
Please referring to accompanying drawing 1 to accompanying drawing 4 and accompanying drawing 9, the utility model mainly comprises light engine pedestal 1, projection lens 2, secondary and the backlash spring 8 of motion thread, design has the projection lens installation and positioning structure on the light engine pedestal 1, projection lens 2 is arranged in the projection lens installation and positioning structure, projection lens installation and positioning structure on the light engine pedestal 1 also is provided with camera lens focusing guiding and stopper slot 9, correspondence position is provided with camera lens focusing guiding and position limiting structure 17 on the projection lens 2, can lead with spacing to the focusing campaign of projection lens 2, both can make projection lens 2 motion in a certain direction within it, can limit the move distance of projection lens 2 again.Also be provided with light shield 12 on the light engine pedestal 1, light engine pedestal 1 and light shield 12 surround an airtight light chamber jointly, and it is indoor that optical element is arranged on light, in the present embodiment, also are provided with camera lens focusing guiding and stopper slot 9 on the light shield 12.
In the present embodiment, the motion thread pair comprises focusing rotating shaft 3 and focusing axle sleeve 4, and this focusing axle sleeve 4 connects as one with projection lens 2, and its inside surface design has internal thread; This focusing rotating shaft 3 outside surfaces design has the screw thread that cooperates with focusing axle sleeve 4, and focusing rotating shaft 3 is inserted in the focusing axle sleeve 4, and in the present embodiment, the screw thread of motion thread pair is acme thread or square thread or V-thread.Have focusing rotating shaft empty avoiding structure 11 on light engine pedestal 1 sidewall, focusing axle sleeve 4 stretches out light engine pedestal 1 outside from focusing rotating shaft empty avoiding structure 11, in the present embodiment, the width of focusing rotating shaft empty avoiding structure 11 will be wider than the width of focusing axle sleeve 4, also can play the qualification effect to the move distance of projection lens 2.In the present embodiment, light engine pedestal 1 outside at focusing rotating shaft empty avoiding structure 11 places is fixed with projection lens guide-localization groove 15, be fixed with the projection lens guide-localization structure 16 that cooperates with projection lens guide-localization groove 15 on the focusing axle sleeve 4, projection lens guide-localization structure 16 is arranged in the projection lens guide-localization groove 15, and position-limiting action is played in the slip of projection lens 2.The fixed sturcture of the restricted focusing rotating shaft of light engine pedestal 1 outside Fixed Design axially-movable, in the present embodiment, the fixed sturcture of restriction focusing rotating shaft axially-movable is a stationary shaft mounting structure 5, and stationary shaft mounting structure 5 designs the lug structure of mounting hole for former and later two.In the present embodiment, go back Fixed Design in the focusing rotating shaft 3 the straight-line focusing ring 6 that the helical motion of motion thread pair can be become projection lens is arranged, focusing ring 6 connects as one with focusing rotating shaft 3, dials and changes the rectilinear motion that focusing ring 6 can become the helical motion of motion thread pair projection lens 2.Focusing ring 6 indoor designs have backlash spring empty avoiding structure 10, and backlash spring 8 is arranged in the backlash spring empty avoiding structure 10.Please referring to accompanying drawing 10 and accompanying drawing 11, in the present embodiment, focusing ring 6 comprises interior ring 13 and the outer shroud 14 that is sleeved on together, interior ring 13 connects as one with focusing rotating shaft 3, on the ring 13, interior ring 13 was provided with the list structure of projection in outer shroud 14 was sleeved on, and correspondence position is provided with corresponding groove on the outer shroud 14, guarantee can not slide relatively when it rotates ring 13 inside in backlash spring empty avoiding structure 10 is arranged on.In the present embodiment, outer shroud 14 adopts elastomeric materials to make, and so both can make the focusing ring 6 that exposes and the face shaping or the collocation of colour of complete machine, the focusing sense of touch in the time of can increasing the consumer again and stir focusing ring 6.In the present embodiment, focusing rotating shaft 3 is a hollow-core construction, be fitted with stationary shaft 7 in the focusing rotating shaft 3, stationary shaft 7 interspersed being fixed in this stationary shaft mounting structure 5, focusing rotating shaft 3 is between former and later two stationary shaft mounting structures 5, the axial linear movement mounting structure 5 that is fixed of focusing rotating shaft 3 limits, and can only rotate around stationary shaft 7.Backlash spring 8 is contained in the space that backlash spring empty avoiding structure 10 and light engine pedestal stationary shaft mounting structure 5 on the focusing ring 6 surrounded, the center line of backlash spring 8 and the central lines of focusing rotating shaft 3 with the axle sleeve 4 of focusing, be in compressive state during backlash spring 8 work, the axial thrust of generation has been eliminated the thread pitch between focusing rotating shaft 3 and the focusing axle sleeve 4.
Because the utility model installed backlash spring 8, compressed backlash spring 8 produces axial thrusts, makes the screw thread of focusing rotating shaft 3 press the screw thread of the axle sleeve 4 of focusing, and has eliminated the thread pitch between the motion thread pair.Guaranteed on the one hand the focusing position accurately and steadily, guarantee that on the other hand the motion thread pair occurs than galling or after than the major thread gap in long-time running, the motion of still can under the effect of backlash spring, accurately focusing stably of motion thread pair.The consumer can drive focusing axle sleeve 4 by the serration of stirring focusing ring 6 excircles and carry out rectilinear motion along stationary shaft, realizes the mobile focusing of projection lens 2 at optical axis direction, uses simple to operation.
Claims (11)
1. minitype projection machine focus control, it is characterized in that: described minitype projection machine focus control comprises the fixed sturcture of projection lens, focusing rotating shaft, focusing axle sleeve, backlash spring and restriction focusing rotating shaft axial linear movement, focusing axle sleeve and projection lens connect as one, and its inside surface design has internal thread; The design of focusing rotating shaft outside surface has the external thread that fits in the motion thread pair with the focusing axle sleeve; The focusing rotating shaft is provided with backlash spring, and the center line of backlash spring is arranged on the fixed sturcture of restriction focusing rotating shaft axial linear movement with the central lines of focusing rotating shaft with the axle sleeve of focusing, motion thread pair.
2. minitype projection machine focus control as claimed in claim 1, it is characterized in that: the centerline design of described focusing rotating shaft has through hole, be provided with a stationary shaft in the through hole, stationary shaft is fixedly mounted on the fixed sturcture of restriction focusing rotating shaft axial linear movement, and the focusing rotating shaft can be rotated around stationary shaft.
3. minitype projection machine focus control as claimed in claim 2, it is characterized in that: the fixed sturcture of described restriction focusing rotating shaft axial linear movement is the stationary shaft mounting structure of design on the light engine pedestal, and described stationary shaft is interspersed to be fixed on this stationary shaft mounting structure; Described focusing rotating shaft is between this stationary shaft mounting structure.
4. minitype projection machine focus control as claimed in claim 3 is characterized in that: the stationary shaft mounting structure on the described projector optical engine pedestal has the lug structure of mounting hole for design.
5. minitype projection machine focus control as claimed in claim 1, it is characterized in that: also designing in the described focusing rotating shaft has focusing ring, stir the rectilinear motion that focusing ring can become the helical motion of motion thread pair projection lens, focusing ring connects as one with the focusing rotating shaft.
6. minitype projection machine focus control as claimed in claim 5, it is characterized in that: described focusing ring design has backlash spring empty avoiding structure, described backlash spring is nested with on stationary shaft, and is contained in the space that backlash spring empty avoiding structure on the focusing ring and light engine pedestal stationary shaft mounting structure surrounded.
7. as each described minitype projection machine focus control in the claim 1 to 6, it is characterized in that: described backlash spring is in compressive state when working.
8. minitype projection machine focus control as claimed in claim 3, it is characterized in that: the focusing rotating shaft empty avoiding structure that also designs the focusing amplitude of restricted focusing rotating shaft on the described light engine pedestal, be fixed with projection lens guide-localization groove on the light engine pedestal at focusing rotating shaft empty avoiding structure place, be fixed with the projection lens guide-localization structure that cooperates with projection lens guide-localization groove on the focusing axle sleeve.
9. as claim 3 or 4 described minitype projection machine focus controls, it is characterized in that: design has the projection lens installation and positioning structure and the focusing campaign of projection lens barrel is led and spacing projection lens focusing guiding and stopper slot on the described light engine pedestal, also is provided with the projection lens focusing on the shadow shield of light engine pedestal loam cake dress and leads and position limiting structure.
10. as claim 5 or 6 described minitype projection machine focus controls, it is characterized in that: described focusing ring comprises interior ring and the outer shroud that is sleeved on together, and interior ring connects as one with the focusing rotating shaft, and on the ring, outer shroud adopted elastomeric material to make in outer shroud was sleeved on.
11. as each described minitype projection machine focus control in the claim 1 to 6, it is characterized in that: the screw thread of described motion thread pair is acme thread, square thread or V-thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200565184U CN201628800U (en) | 2010-01-14 | 2010-01-14 | Mini projector focusing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200565184U CN201628800U (en) | 2010-01-14 | 2010-01-14 | Mini projector focusing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201628800U true CN201628800U (en) | 2010-11-10 |
Family
ID=43060198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200565184U Expired - Fee Related CN201628800U (en) | 2010-01-14 | 2010-01-14 | Mini projector focusing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201628800U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102681316A (en) * | 2012-04-10 | 2012-09-19 | 海信集团有限公司 | Focusing device for projection equipment |
| WO2013097451A1 (en) * | 2011-12-30 | 2013-07-04 | Zhao Hui | Ray machine focus adjustment mechanism for micro projector |
| CN105022209A (en) * | 2014-04-16 | 2015-11-04 | 信泰光学(深圳)有限公司 | Micro-projector |
| CN105319810A (en) * | 2014-06-27 | 2016-02-10 | 中强光电股份有限公司 | Lens adjusting module and projector |
| CN108803208A (en) * | 2018-06-19 | 2018-11-13 | 青岛海信激光显示股份有限公司 | projection device |
| US10705415B2 (en) | 2018-06-19 | 2020-07-07 | Qingdao Hisense Laser Display Co., Ltd. | Projector device |
-
2010
- 2010-01-14 CN CN2010200565184U patent/CN201628800U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013097451A1 (en) * | 2011-12-30 | 2013-07-04 | Zhao Hui | Ray machine focus adjustment mechanism for micro projector |
| CN102681316A (en) * | 2012-04-10 | 2012-09-19 | 海信集团有限公司 | Focusing device for projection equipment |
| CN102681316B (en) * | 2012-04-10 | 2014-08-06 | 海信集团有限公司 | Focusing device for projection equipment |
| CN105022209A (en) * | 2014-04-16 | 2015-11-04 | 信泰光学(深圳)有限公司 | Micro-projector |
| CN105319810A (en) * | 2014-06-27 | 2016-02-10 | 中强光电股份有限公司 | Lens adjusting module and projector |
| US9851543B2 (en) | 2014-06-27 | 2017-12-26 | Coretronic Corporation | Projection lens adjustment module and projector using the same |
| CN108803208A (en) * | 2018-06-19 | 2018-11-13 | 青岛海信激光显示股份有限公司 | projection device |
| US10705415B2 (en) | 2018-06-19 | 2020-07-07 | Qingdao Hisense Laser Display Co., Ltd. | Projector device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201628800U (en) | Mini projector focusing device | |
| CN201732199U (en) | Focusing device of miniature projector | |
| CN103851131B (en) | The epicycloid planetary gear cam of cyclo drive device | |
| TWI395883B (en) | Multi-staged hinge assembly and portable electrical device comprising the same | |
| WO2021127937A1 (en) | Photographing device, electronic apparatus, and method of using electronic apparatus | |
| CN201429767Y (en) | Mini-type projector focusing device | |
| US10852777B2 (en) | Flippable electronic device | |
| CN203214573U (en) | Synchronous movement device for double-rotating shaft system | |
| CN203117501U (en) | Mobile type lens structure | |
| CN105650106A (en) | Electronic device and double-shaft synchronous rotating mechanism thereof | |
| TWI589789B (en) | Portable electronic apparatus | |
| CN201455670U (en) | Lifting and swinging divider | |
| CN105022506A (en) | Touch control pen | |
| CN101825137B (en) | Multi-stage hinge assembly and portable electronic device containing same | |
| CN201193690Y (en) | Ball screw rod device | |
| CN206916471U (en) | Clutch driving lever, clutch and washing machine | |
| CN216519159U (en) | Synchronous turnover damping mechanism for folding flexible screen and folding hinge | |
| CN101119397B (en) | Portable electronic device of embedded camera module group | |
| CN109003508A (en) | A kind of wall-mounted teaching one-piece | |
| CN205118596U (en) | Simplify screen support frame base structure | |
| CN213629635U (en) | Projection arrangement that visual transmission design was used | |
| CN101551582B (en) | Projector | |
| CN108644335A (en) | Leading screw Linear actuator | |
| TW201447142A (en) | Multi-mode continuously variable transmission mechanism | |
| CN117032401B (en) | Turnover mechanism of notebook computer camera |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101110 Termination date: 20120114 |