CN201732199U - Focusing device of miniature projector - Google Patents
Focusing device of miniature projector Download PDFInfo
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- CN201732199U CN201732199U CN201020116523XU CN201020116523U CN201732199U CN 201732199 U CN201732199 U CN 201732199U CN 201020116523X U CN201020116523X U CN 201020116523XU CN 201020116523 U CN201020116523 U CN 201020116523U CN 201732199 U CN201732199 U CN 201732199U
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- focusing
- worm screw
- backlash spring
- stationary shaft
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- 238000009434 installation Methods 0.000 claims description 4
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- 238000007906 compression Methods 0.000 description 2
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- 239000000047 product Substances 0.000 description 2
- 239000006227 byproduct Substances 0.000 description 1
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Abstract
The utility model relates to a focusing device of a miniature projector, which comprises a projecting lens (1), a focusing worm rod (2), a focusing gear (3), an axial backlash spring (4), a radial backlash spring (5) and a fixed structure (6), wherein the fixed structure (6) limits the axial linear movement of the focusing worm rod, the focusing gear (3) and the projecting lens (1) are connected into a whole body, outer teeth (21) matched with the focusing gear (3) for forming a transmission pair are designed on the surface of the focusing worm rod (2), the axial backlash spring (4) and the radial backlash spring (5) are arranged on the focusing worm rod (2), the center line of the axial backlash spring (4) is coincident with the center line of the focusing worm rod (2), the center line of the radial backlash spring (5) is vertical with the center line of the focusing worm rod (2), the transmission pair formed by the focusing worm rod (2) and the focusing gear (3) is arranged on the fixed structure (6) for limiting the axial linear movement of the focusing worm rod through a fixed shaft (7). The utility model has the advantages of accurate and stable focusing, simple and convenient operation, and can prevent the damage of the transmission pair of the focusing worm rod and the focusing gear.
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, lens barrel adopts the (patent publication No.: CN101093273) that is threaded with focusing ring, utilize the precision-fit of screw thread between lens barrel 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.Equally, if adopt gear drive, also can there be the backlash problem same with the screw thread transmission.Therefore, the control of projector's focusing system thread pitch or backlash 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 solution of the utility model is: design a kind of minitype projection machine focus control, comprise light engine pedestal, projection lens, focusing worm screw and focusing gear, focusing gear and projection lens connect as one; Focusing worm screw surface design has the external tooth that becomes transmission with the focusing gear matched, and the projection lens that described projection lens is movably arranged on the light engine pedestal presets in the space; The focusing worm screw is provided with axial backlash spring, the central lines of the center line of axial backlash spring and focusing worm screw, and the transmission of the focusing worm screw and the gear formation of focusing is arranged on restriction focusing worm shaft on straight-line fixed sturcture.
The utility model also comprises radially backlash spring, and radially the center line of backlash spring is vertical with the center line of focusing worm screw.
The centerline design of described focusing worm screw has through hole, be provided with a stationary shaft in the through hole, stationary shaft is fixedly mounted on restriction focusing worm shaft on straight-line fixed sturcture, described axial backlash spring and radially backlash spring be arranged on the described stationary shaft, the focusing worm screw rotate around stationary shaft.
Described restriction focusing worm shaft is the stationary shaft mounting structure of design on the light engine pedestal to straight-line fixed sturcture, and described stationary shaft is interspersed to be positioned on this stationary shaft mounting structure; Described focusing worm screw is between this stationary shaft mounting structure.
Also designing on the described focusing worm screw has focusing ring, and stirring focusing ring can become the rectilinear motion of projection lens with rotatablely moving of worm screw of focusing, and focusing ring connects as one with the focusing worm screw.
The design of described focusing ring has axial backlash spring empty avoiding structure, and described axial backlash spring is nested with on stationary shaft, and is contained in the space that axial backlash spring empty avoiding structure on the focusing ring and light engine pedestal stationary shaft mounting structure surrounded; Design has a radially backlash spring mounting structure on the described stationary shaft mounting structure, and radially backlash spring is installed in this radially in the backlash spring mounting structure.
Described axial backlash spring is in compressive state when working.
Described radially backlash spring is in extended state or compressive state when working.
Also designing on the spacing space of focusing worm screw empty avoiding of focusing amplitude of restricted focusing worm screw or the described light engine pedestal design on the described light engine pedestal has the projection lens installation and positioning structure and the focusing campaign of camera lens is led and spacing focusing guiding and position limiting structure; Or the focusing ring on the described focusing worm screw is combined by two parts.
Described focusing worm screw and stationary shaft are combined as a whole; Described radially backlash spring is arranged in the outside of stationary shaft.
The utlity model has following advantage:
1, focusing accurately steadily
Because this device installed axial backlash spring, compressed axial backlash spring produces axial thrust, makes the external tooth of focusing worm screw press the external tooth of the gear of focus, has eliminated focusing worm screw and the focusing gear driving pair backlash on axial.Because radially backlash spring has been installed, can be in extended state or compressive state when radially backlash spring is worked, produce radially tension or snap-in force respectively, make the external tooth of focusing worm screw press the external tooth of the gear of focus, eliminated the backlash that the focusing worm screw and the gear driving pair of focusing directly make progress.Axially backlash spring and the radially installation of backlash spring, guaranteed the accurate and steady of position of focusing in the focusing process on the one hand, guarantee focusing worm screw and focusing gear driving pair on the other hand after big backlash appears in the long-time running wearing and tearing, still can be and the motion of radially accurately focusing stably under the effect of backlash spring at axial backlash spring.
2, prevent from the to focus damage of worm screw and focusing gear driving pair
Because this device has been installed axial backlash spring and backlash spring radially, produce axial pressing force and radial compaction power on the one hand, eliminated focusing worm screw and focusing gear shaft to the backlash that directly makes progress; On the other hand, when abnormal operation occurring, focusing worm screw and the acting force of focusing between the gear reach capacity when gear occurring and destroy, because axially backlash spring and the radially elasticity of backlash spring, backlash spring drives separating of focusing worm screw and focusing gear with reversal deformation under limit acting force, avoids occurring the phenomenon that gear destroys.
3, easy and simple to handle
The consumer can be rotated along stationary shaft by the serration drive focusing worm screw that stirs the focusing ring excircle and move, and realizes that projection lens moves focusing at the straight line of 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 part plan cross-sectional schematic at visual angle, Fig. 1 right side.
Fig. 4 is the part plan sectional structure synoptic diagram of Fig. 1 along focusing worm screw center line.
Fig. 5 be Fig. 4 another kind radially backlash spring example schematic is installed.
Fig. 6 is the schematic perspective view of light shield.
Fig. 7 is the schematic perspective view of light engine pedestal.
Fig. 8 be projection lens schematic perspective view.
Fig. 9 is the schematic perspective view of backlash spring radially.
Figure 10 is the schematic perspective view of focusing worm screw.
Figure 11 is that second kind of embodiment of the present utility model makes up schematic perspective view.
Figure 12 is the exploded perspective synoptic diagram of Figure 11.
Figure 13 is the schematic perspective view of the focusing worm screw among Figure 11.
Embodiment
See also Fig. 1 to Figure 10, the utility model is a kind of minitype projection machine focus control with disclosing, comprise light engine pedestal 8, projection lens 1, focusing worm screw 2, focusing gear 3, axial backlash spring 4, the fixed sturcture 6 of backlash spring 5 and restriction focusing worm screw 2 axial linear movement radially, described projection lens 1 is fixed on the described light engine pedestal 8 by light shield 10 and 4 screws 11 and screw, in order to guarantee that projection lens 1 can move back and forth with respect to light engine pedestal 8, be provided with chute 93 at described light engine pedestal 8, on described projection lens 1, be provided with the raised line 94 of respective numbers, during assembling, raised line on the projection lens 1 94 is contained in the chute 93 on the light engine pedestal 8, gets final product.Described focusing gear 3 connects as one with projection lens 1; Focusing worm screw 2 surface design have the external tooth 21 that fits in transmission with focusing gear 3; Focusing worm screw 2 is provided with axial backlash spring 4 and backlash spring 5 radially, the axial central lines of the center line of backlash spring 4 and focusing worm screw 2, and radially the center line of backlash spring 5 is vertical with the center line of the worm screw 2 of focusing; The transmission that focusing worm screw 2 and focusing gear 3 constitute is arranged on restriction focusing worm shaft on straight-line fixed sturcture 6.The centerline design of described focusing worm screw 2 has through hole 22, is provided with a stationary shaft 7 in the through hole 22, and stationary shaft 7 is fixedly mounted on restriction focusing worm shaft on straight-line fixed sturcture 6, and focusing worm screw 2 is rotated around stationary shaft 7.Described restriction focusing worm shaft is the stationary shaft mounting structure of design on light engine pedestal 8 to straight-line fixed sturcture 6, described stationary shaft 7 interspersed being positioned on this stationary shaft mounting structure; Described focusing worm screw 2 is between this stationary shaft mounting structure.The utility model is owing to installed axial backlash spring, and compressed axial backlash spring produces axial thrust, makes the external tooth of focusing worm screw press the external tooth of the gear of focus, has eliminated focusing worm screw and the focusing gear driving pair backlash on axial.Because radially backlash spring has been installed, can be in extended state or compressive state when radially backlash spring is worked, produce radially tension or snap-in force respectively, make the external tooth of focusing worm screw press the external tooth of the gear of focus, eliminated the backlash that the focusing worm screw and the gear driving pair of focusing directly make progress.
Figure 4 shows that described radially backlash spring 5 can be installed between focusing worm screw 2 and the pedestal 8, is in extended state during work; The radially backlash spring that is stretched 5 produces the radial shrinkage power, the worm screw 2 of will the focus focusing gear 3 that furthers, elimination backlash.When abnormal operation occurring, when the acting force between focusing worm screw 2 and the focusing gear 3 reaches capacity the destruction gear, radially backlash spring 5 is in the moment of limit acting force appearance, the spring moment generation trace that has been in extended state stretches, make focusing worm screw 2 leave focusing gear 3, destroying appears in avoid focusing worm screw 2 or focusing gear 3.
Figure 5 shows that described radially backlash spring 5 is installed in focusing worm screw 2 outsides, is in compressive state during work; Compressed radially backlash spring 5 produces radial thrust, and the worm screw 2 of will focusing pushes away nearly focusing gear 3, eliminates backlash.When abnormal operation occurring, when the acting force between focusing worm screw 2 and the focusing gear 3 reaches capacity the destruction gear, radially backlash spring 5 is in the moment of limit acting force appearance, be in the spring moment generation trace compression of compressive state, make focusing worm screw 2 leave focusing gear 3, avoid gear to occur destroying.
Also designing on the described focusing worm screw 2 has focusing ring 23, and stirring focusing ring 23 can become the rectilinear motion of projection lens 1 with rotatablely moving of worm screw 2 of focusing, and focusing ring 23 connects as one with focusing worm screw 2.
23 designs of described focusing ring have axial backlash spring empty avoiding structure, and described axial backlash spring 4 is nested with on stationary shaft 7, and are contained in the space that axial backlash spring empty avoiding structure on the focusing ring and light engine pedestal 8 stationary shaft mounting structures are surrounded; Design has a radially backlash spring mounting structure 92 on the described fixed sturcture 6, and radially backlash spring 5 is installed in this radially in the backlash spring mounting structure 92.Described axial backlash spring 4 is in compressive state when working; Described radially backlash spring 5 is in extended state or compressive state when working.
Also design the spacing space 91 of focusing worm screw empty avoiding of the focusing amplitude of restricted focusing worm screw 2 on the described light engine pedestal 8.Design has the projection lens installation and positioning structure and the focusing campaign of camera lens is led and spacing focusing guiding and position limiting structure 9 on the described light engine pedestal 8.Focusing ring 23 on the described focusing worm screw 2 can be combined by two parts.
See also Figure 11 to Figure 13, Figure 11 to Figure 13 is the structural representation of another kind of embodiment of the present utility model, it with Fig. 1 to embodiment illustrated in fig. 10 comparing, its general structure is identical, different described focusing worm screw 2 and stationary shaft 7 are to be combined as a whole.In this case, for carrying out smoothly of guaranteeing to focus and move, the radially backlash spring 5 of this kind embodiment can only use compression spring, and promptly radially backlash spring 5 is arranged in the outside; Obviously, after stationary shaft 7 and focusing worm screw 2 were combined into same integral body, the stationary shaft 7 on the focusing worm screw 2 just must rotate with focusing worm screw 2, and at this moment, 7 of stationary shaft cover 24 by two and half and have been positioned on the light engine pedestal 8.
Claims (10)
1. a minitype projection machine focus control comprises light engine pedestal (8), projection lens (1), focusing worm screw (2) and focusing gear (3), and focusing gear (3) connects as one with projection lens (1); Focusing worm screw (2) surface design has the external tooth (21) that fits in transmission with focusing gear (3), and the projection lens that described projection lens (1) is movably arranged on the light engine pedestal (8) presets in the space; It is characterized in that: focusing worm screw (2) is provided with axial backlash spring (4), the central lines of the center line of axial backlash spring (4) and focusing worm screw (2), the transmission of focusing worm screw (2) and focusing gear (3) formation are arranged on and limit the focusing worm shaft on straight-line fixed sturcture (6).
2. minitype projection machine focus control as claimed in claim 1 is characterized in that: also comprise radially backlash spring (5), radially the center line of backlash spring (5) is vertical with the center line of focusing worm screw (2).
3. minitype projection machine focus control as claimed in claim 2, it is characterized in that: the centerline design of described focusing worm screw (2) has through hole (22), be provided with a stationary shaft (7) in the through hole (22), stationary shaft (7) is fixedly mounted on the fixed sturcture (6) of restriction focusing worm screw (2) axial linear movement, described axial backlash spring (4) and radially backlash spring (5) be arranged on the described stationary shaft (7), the focusing worm screw (2) rotate around stationary shaft (7).
4. minitype projection machine focus control as claimed in claim 3, it is characterized in that: described restriction focusing worm shaft is the stationary shaft mounting structure of design on light engine pedestal (8) to straight-line fixed sturcture (6), and described stationary shaft (7) is interspersed to be positioned on this stationary shaft mounting structure; Described focusing worm screw (2) is between this stationary shaft mounting structure.
5. minitype projection machine focus control as claimed in claim 2, it is characterized in that: also designing on the described focusing worm screw (2) has focusing ring (23), stirring focusing ring (23) can become the rectilinear motion of projection lens (1) with rotatablely moving of focusing worm screw (2), and focusing ring (23) connects as one with focusing worm screw (2).
6. minitype projection machine focus control as claimed in claim 5, it is characterized in that: described focusing ring (23) design has axial backlash spring empty avoiding structure, described axial backlash spring (4) is nested with on stationary shaft (7), and is contained in the space that axial backlash spring empty avoiding structure on the focusing ring and light engine pedestal (8) stationary shaft mounting structure surrounded; Design has a radially backlash spring mounting structure (92) on the described stationary shaft mounting structure, and radially backlash spring (5) is installed in this radially in the backlash spring mounting structure (92).
7. as each described minitype projection machine focus control in the claim 1 to 6, it is characterized in that: be in compressive state during described axial backlash spring (4) work.
8. as each described minitype projection machine focus control in the claim 2 to 6, it is characterized in that: be in extended state or compressive state during described radially backlash spring (5) work.
9. as each described minitype projection machine focus control in the claim 1 to 6, it is characterized in that: also design the spacing space of focusing worm screw empty avoiding (91) of focusing amplitude of restricted focusing worm screw or described light engine pedestal (8) on the described light engine pedestal (8) and go up design and the projection lens installation and positioning structure is arranged and the focusing campaign of camera lens is led and spacing focusing guiding and position limiting structure (9); Or the focusing ring (23) on the described focusing worm screw (2) is combined by two parts.
10. as claim 2 minitype projection machine focus control, it is characterized in that: described focusing worm screw (2) is combined as a whole with stationary shaft (7); Described radially backlash spring (5) is arranged in the outside of stationary shaft (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020116523XU CN201732199U (en) | 2010-02-09 | 2010-02-09 | Focusing device of miniature projector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020116523XU CN201732199U (en) | 2010-02-09 | 2010-02-09 | Focusing device of miniature projector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201732199U true CN201732199U (en) | 2011-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020116523XU Expired - Fee Related CN201732199U (en) | 2010-02-09 | 2010-02-09 | Focusing device of miniature projector |
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| Country | Link |
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| CN (1) | CN201732199U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105022209A (en) * | 2014-04-16 | 2015-11-04 | 信泰光学(深圳)有限公司 | Micro-projector |
| CN105607212A (en) * | 2014-10-27 | 2016-05-25 | 信泰光学(深圳)有限公司 | Focal length adjustment mechanism |
| CN108873575A (en) * | 2018-06-27 | 2018-11-23 | 苏州佳世达光电有限公司 | lens focusing device and projector |
| CN110199225A (en) * | 2017-01-17 | 2019-09-03 | Thk株式会社 | Projector apparatus |
| CN111965780A (en) * | 2020-08-19 | 2020-11-20 | 济南和普威视光电技术有限公司 | Clearance-eliminating type double-field-of-view infrared thermal imaging lens and using method thereof |
| CN113296345A (en) * | 2021-05-18 | 2021-08-24 | 福建易美特电子科技有限公司 | Clock character projection equipment with rotating and zooming functions |
| CN115268187A (en) * | 2022-08-02 | 2022-11-01 | 晋江市维夏智能科技有限公司 | Projection display equipment |
| CN115842848A (en) * | 2023-03-01 | 2023-03-24 | 成都远峰科技发展有限公司 | Dynamic monitoring system based on industrial Internet of things and control method thereof |
| TWI820176B (en) * | 2018-08-31 | 2023-11-01 | 日商索尼股份有限公司 | Lens shift mechanism and projection display device |
-
2010
- 2010-02-09 CN CN201020116523XU patent/CN201732199U/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105022209A (en) * | 2014-04-16 | 2015-11-04 | 信泰光学(深圳)有限公司 | Micro-projector |
| CN105607212A (en) * | 2014-10-27 | 2016-05-25 | 信泰光学(深圳)有限公司 | Focal length adjustment mechanism |
| CN110199225B (en) * | 2017-01-17 | 2021-10-22 | Thk株式会社 | Projector apparatus |
| CN110199225A (en) * | 2017-01-17 | 2019-09-03 | Thk株式会社 | Projector apparatus |
| CN108873575A (en) * | 2018-06-27 | 2018-11-23 | 苏州佳世达光电有限公司 | lens focusing device and projector |
| CN108873575B (en) * | 2018-06-27 | 2020-10-20 | 苏州佳世达光电有限公司 | Lens focusing device and projector |
| TWI820176B (en) * | 2018-08-31 | 2023-11-01 | 日商索尼股份有限公司 | Lens shift mechanism and projection display device |
| CN111965780B (en) * | 2020-08-19 | 2021-05-11 | 济南和普威视光电技术有限公司 | Clearance-eliminating type double-field-of-view infrared thermal imaging lens and using method thereof |
| CN111965780A (en) * | 2020-08-19 | 2020-11-20 | 济南和普威视光电技术有限公司 | Clearance-eliminating type double-field-of-view infrared thermal imaging lens and using method thereof |
| CN113296345A (en) * | 2021-05-18 | 2021-08-24 | 福建易美特电子科技有限公司 | Clock character projection equipment with rotating and zooming functions |
| CN115268187A (en) * | 2022-08-02 | 2022-11-01 | 晋江市维夏智能科技有限公司 | Projection display equipment |
| CN115268187B (en) * | 2022-08-02 | 2024-04-19 | 深圳市艾克斯视讯科技有限公司 | Projection display equipment |
| CN115842848A (en) * | 2023-03-01 | 2023-03-24 | 成都远峰科技发展有限公司 | Dynamic monitoring system based on industrial Internet of things and control method thereof |
| CN115842848B (en) * | 2023-03-01 | 2023-04-28 | 成都远峰科技发展有限公司 | Dynamic monitoring system based on industrial Internet of things and control method thereof |
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Legal Events
| Date | Code | Title | Description |
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| 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: 20110202 Termination date: 20120209 |