CN214311260U - Focusing device of projection lens - Google Patents
Focusing device of projection lens Download PDFInfo
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- CN214311260U CN214311260U CN202120097263.4U CN202120097263U CN214311260U CN 214311260 U CN214311260 U CN 214311260U CN 202120097263 U CN202120097263 U CN 202120097263U CN 214311260 U CN214311260 U CN 214311260U
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Abstract
The utility model discloses a projection lens focusing device relates to projector technical field, specifically is a projection lens focusing device includes lens group lens cone, back lens group lens cone and preceding lens group lens cone, and back lens group lens cone has been cup jointed to the one end of lens group lens cone, and the other end of lens group lens cone has cup jointed preceding lens group lens cone, and the downside of the surface of lens group lens cone articulates through the fourth journal stirrup has thin accurate burnt hob, and the one end fixed mounting of thin accurate burnt hob has the second worm, and the surface of second worm articulates there is the second turbine. Through the cooperation setting of turbine and worm, can make lens group lens cone, back lens group lens cone and preceding lens group lens cone relative movement with the horizontal power that the circumference power of thick accurate burnt hob and thin accurate burnt hob changes the lens cone into at the in-process that uses to play the effect that makes the structure simpler and make things convenient for focusing, through the setting of thin accurate burnt hob, made this projecting lens focusing device possess the effect of fine setting.
Description
Technical Field
The utility model relates to a projector technical field specifically is a projection lens focusing device.
Background
With the development of scientific technology, especially the push of semiconductor technology, portable electronic devices are continuously designed and manufactured. The improvement of the functions of portable electronic devices has led to the development of demands of users on display devices of human-computer interfaces towards miniaturization, large screens and high resolution. Under the strong demand of the users, in recent years, the development of projector technology is rapid, and DLP, LCOS and other products have developed portable projectors with high performance, small size and light weight.
In the field of projection, due to different scenes, the distance between the projection device and the projection plane on which the image is projected is different, and the focal length of the lens is adjusted accordingly, and the focusing device is used for compensating defocusing caused by various factors, so that a clearer projection picture can be obtained. The common focusing method of the projector is characterized in that a focusing ring is sleeved at the exposed end of a lens, and the lens is driven to move back and forth along the optical axis direction of the lens by rotating the focusing ring to realize focusing.
SUMMERY OF THE UTILITY MODEL
Technical problem to be solved
Not enough to prior art, the utility model provides a projection lens focusing device has solved the problem of proposing among the above-mentioned background art.
(II) technical scheme
In order to achieve the above purpose, the utility model discloses a following technical scheme realizes: a focusing device of a projection lens comprises a lens group lens barrel, a rear lens group lens barrel and a front lens group lens barrel, wherein a first groove is formed in the outer surface of the lens group lens barrel close to the edge part, a second groove is formed in the outer surface of the lens group lens barrel close to the middle part, a first support lug is fixedly installed on the upper side of the outer surface of the lens group lens barrel, a second support lug is fixedly installed on the outer surface of the lens group lens barrel close to the first support lug, a third support lug is fixedly installed on the lower side of the outer surface of the lens group lens barrel, a fourth support lug is fixedly installed on the lower side of the outer surface of the lens group lens barrel close to the third support lug, one end of the lens group lens barrel is sleeved with one end of the rear lens group lens barrel, a first guide groove is formed in the outer surface of the rear lens group lens barrel, a fifth support lug is fixedly installed on the upper side of the outer surface of the rear lens group lens barrel, and one end of the inner wall of the rear lens group lens barrel is provided with an inner thread matched with a projection machine, the other end of the lens group lens barrel is sleeved with one end of the front lens group lens barrel, a second guide groove is formed in the outer surface of the front lens group lens barrel, and a sixth support lug is fixedly mounted on the lower side of the outer surface of the front lens group lens barrel.
Optionally, the middle parts of the first lug, the second lug, the third lug, the fifth lug, the sixth lug and the fourth lug are all provided with through holes, the number of the first lug and the number of the fourth lug are two, and the inner walls of the through holes of the sixth lug and the fifth lug are provided with internal threads.
Optionally, thick accurate burnt hob has been run through the bearing in the inside of first journal stirrup through-hole, the first worm of one end fixedly connected with of the surface of thick accurate burnt hob, the other end of the surface of thick accurate burnt hob is equipped with first anti-skidding line, it has first screw rod to run through the bearing in the through-hole of second journal stirrup, the first turbine of one end fixedly connected with of the surface of first screw rod, and first worm and first turbine adaptation, the other end of first screw rod runs through the fifth journal stirrup, and be equipped with the internal thread with first screw rod adaptation in the through-hole of fifth journal stirrup.
Optionally, the inside of fourth journal stirrup through-hole is run through the bearing and is had the thin burnt hob, the one end fixedly connected with second worm of the surface of the thin burnt hob, the other end of the surface of the thin burnt hob is equipped with second anti-skidding line, it has the second screw rod to run through the bearing in the through-hole of third journal stirrup, the one end fixedly connected with second turbine of the surface of second screw rod, and second worm and second turbine adaptation, the other end of second screw rod runs through and has the third journal stirrup, and be equipped with the internal thread with the second screw rod adaptation in the through-hole of sixth journal stirrup.
Optionally, the inner surfaces of the first groove and the second groove are both provided with threads, the first groove is in threaded connection with a first guide rod, and the second groove is in threaded connection with a second guide rod.
Optionally, the inner wall of the lens group lens barrel is connected with a lens group in a clamping manner, the inner wall of the rear lens group lens barrel is connected with a rear lens group in a clamping manner, and the inner wall of the front lens group lens barrel is connected with a front lens group in a clamping manner.
Optionally, the pitch of the second screw is one third of the pitch of the first screw.
(III) advantageous effects
The utility model provides a projection lens focusing device possesses following beneficial effect:
1. this projecting lens focusing device through the setting of the screw rod of accurate burnt of carefully, sets up through the cooperation of turbine and worm, can change the circumference power of thick accurate burnt screw rod and accurate burnt screw rod of carefully into the horizontal force of lens cone at the in-process that uses to play the effect of fine setting, made this projecting lens focusing device possess the effect of fine setting.
2. This projecting lens focusing device sets up through the cooperation of turbine and worm, can rotate through thick accurate burnt hob of rotation and the accurate hob control worm that focuses of thin at the in-process that uses to the control worm rotates, makes lens group lens cone, back lens group lens cone and preceding lens group lens cone relative movement, thereby has played the effect of making things convenient for focusing, has reached convenient and fast's purpose.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the exploded structure of the present invention;
FIG. 3 is a schematic view of the worm gear of the present invention;
fig. 4 is a schematic sectional view of the present invention.
In the figure: 1. a lens group barrel; 2. a rear lens group barrel; 3. a front lens group barrel; 4. a first screw; 5. a first turbine; 6. a coarse focusing screw rod; 7. a second screw; 8. a second turbine; 9. a fine quasi-focus screw rod; 10. a second guide bar; 11. a first guide bar; 101. a first groove; 102. a second groove; 103. a first lug; 104. a second lug; 105. a third lug; 106. a fourth lug; 107. A lens group; 201. a first guide groove; 202. a fifth lug; 203. an internal thread; 204. a rear lens group; 301. a second guide groove; 302. a sixth lug; 303. a front lens group; 601. a first worm; 602. A first anti-skid pattern; 901. a second worm; 902. and a second anti-slip pattern.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Referring to fig. 1 to 4, the present invention provides a technical solution: a focusing device of a projection lens comprises a lens group lens barrel 1, a rear lens group lens barrel 2 and a front lens group lens barrel 3, wherein a first groove 101 is formed in the outer surface of the lens group lens barrel 1 close to the edge part, threads are formed in the inner surfaces of the first groove 101 and the second groove 102, a first guide rod 11 is in threaded connection with the first groove 101, a second guide rod 10 is in threaded connection with the second groove 102, a lens group 107 is clamped and connected to the inner wall of the lens group lens barrel 1, a second groove 102 is formed in the outer surface of the lens group lens barrel 1 close to the middle part, a first lug 103 is fixedly installed on the upper side of the outer surface of the lens group lens barrel 1, a coarse focusing screw rod 6 penetrates through the inside of a through hole of the first lug 103 through a bearing, a first worm 601 is fixedly connected to one end of the outer surface of the coarse focusing screw rod 6, a first anti-slip thread 602 is arranged at the other end of the outer surface of the coarse focusing screw rod 6, a first screw rod 4 penetrates through the through hole of a second lug 104 through a bearing, one end of the outer surface of the first screw 4 is fixedly connected with a first worm wheel 5, the first worm 601 is matched with the first worm wheel 5, the other end of the first screw 4 penetrates through the fifth lug 202, an internal thread matched with the first screw 4 is arranged in a through hole of the fifth lug 202, a second lug 104 is fixedly arranged at a position, close to the first lug 103, on the outer surface of the lens group lens barrel 1, a third lug 105 is fixedly arranged on the lower side of the outer surface of the lens group lens barrel 1, a fourth lug 106 is fixedly arranged on the lower side of the outer surface of the lens group lens barrel 1, close to the third lug 105, a fine focusing screw rod 9 penetrates through the inside of the through hole of the fourth lug 106 through a bearing, one end of the outer surface of the fine focusing screw rod 9 is fixedly connected with a second worm 901, a second anti-slip thread 902 is arranged at the other end of the outer surface of the fine focusing screw rod 9, a second screw 7 penetrates through the through hole of the third lug 105, one end of the outer surface of the second screw 7 is fixedly connected with a second turbine 8, a second worm 901 is matched with the second turbine 8, the other end of the second screw 7 penetrates through a third lug 105, an inner thread matched with the second screw 7 is arranged in a through hole of a sixth lug 302, the thread pitch of the second screw 7 is one third of that of the first screw 4, one end of the lens group lens barrel 1 is sleeved with one end of the rear lens group lens barrel 2, the inner wall of the rear lens group lens barrel 2 is clamped with a rear lens group 204, the outer surface of the rear lens group lens barrel 2 is provided with a first guide groove 201, the upper side of the outer surface of the rear lens group lens barrel 2 is fixedly provided with a fifth lug 202, one end of the inner wall of the rear lens group lens barrel 2 is provided with an inner thread 203 matched with the projector, the other end of the lens group lens barrel 1 is sleeved with one end of the front lens group lens barrel 3, the outer surface of the front lens group lens barrel 3 is provided with a second guide groove 301, a sixth lug 302 is fixedly mounted on the lower side of the outer surface of the front lens group barrel 3, through holes are formed in the middle of the first lug 103, the second lug 104, the third lug 105, the fifth lug 202, the sixth lug 302 and the fourth lug 106, the number of the first lug 103 and the number of the fourth lug 106 are two, and internal threads are formed in the inner walls of the through holes of the sixth lug 302 and the fifth lug 202.
During the use, with 2 threaded connection of back lens group lens cone on the projector, through rotatory thick accurate burnt hob 6, make first worm 601 receive the circumference power, it is rotatory to drive first turbine 5, thereby drive first screw rod 4 and rotate, because of the cooperation of first guide bar 11 and first guide way 201, make back lens group lens cone 2 and lens group lens cone 1 can only relative horizontal migration, thereby reach the effect of coarse adjusting, then through rotatory thin accurate burnt hob 9, make second worm 901 receive the circumference power, it is rotatory to drive second turbine 8, thereby drive second screw rod 7 and rotate, because of the cooperation of second guide bar 10 and second guide way 301, make preceding lens group lens cone 3 and lens group lens cone 1 can only relative horizontal migration, thereby reach the effect of fine setting.
The utility model discloses a theory of operation and beneficial effect: the focusing device of the projection lens is arranged by matching a worm wheel and a worm, and in the using process, the first worm 601 is subjected to circumferential force by rotating the coarse focusing screw rod 6 to drive the first worm wheel 5 to rotate so as to drive the first screw rod 4 to rotate, and the rear lens group lens barrel 2 and the lens group lens barrel 1 can only relatively horizontally move due to the matching of the second guide rod 10 and the first guide groove 201, so that the coarse adjustment effect is achieved; then through rotatory thin accurate burnt hob 9, make second worm 901 receive the circumference power, it is rotatory to drive second turbine 8, thereby drive second screw rod 7 and rotate, because of the cooperation of first guide bar 11 and second guide way 301, make preceding lens group lens cone 3 and lens group lens cone 1 horizontal migration relatively, and the pitch because of second screw rod 7 is first screw rod 4's third, thereby reach the effect of fine setting, the effect of making things convenient for focusing has been played, the purpose of making things convenient for focusing has been reached, cooperation through turbine and worm sets up, thereby played the effect that makes the structure simpler, make this projection lens focusing device possess the effect of fine setting.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (7)
1. The utility model provides a projection lens focusing device, includes lens group lens cone (1), back lens group lens cone (2) and preceding lens group lens cone (3), its characterized in that: a first groove (101) is formed in the outer surface of the lens group lens barrel (1) close to the edge, a second groove (102) is formed in the outer surface of the lens group lens barrel (1) close to the middle, a first lug (103) is fixedly mounted on the upper side of the outer surface of the lens group lens barrel (1), a second lug (104) is fixedly mounted on the outer surface of the lens group lens barrel (1) close to the first lug (103), a third lug (105) is fixedly mounted on the lower side of the outer surface of the lens group lens barrel (1), a fourth lug (106) is fixedly mounted on the lower side of the outer surface of the lens group lens barrel (1) close to the third lug (105), one end of the lens group lens barrel (1) is sleeved with one end of the rear lens group lens barrel (2), a first guide groove (201) is formed in the outer surface of the rear lens group lens barrel (2), a fifth lug (202) is fixedly mounted on the upper side of the outer surface of the rear lens group lens barrel (2), the one end of the inner wall of back lens group lens cone (2) is equipped with internal thread (203) with the projector adaptation, the other end of lens group lens cone (1) with the one end of preceding lens group lens cone (3) cup joints, the surface of preceding lens group lens cone (3) is equipped with second guide way (301), the downside fixed mounting of the surface of preceding lens group lens cone (3) has sixth journal stirrup (302).
2. A projection lens focusing apparatus according to claim 1, wherein: the middle parts of the first support lug (103), the second support lug (104), the third support lug (105), the fifth support lug (202), the sixth support lug (302) and the fourth support lug (106) are provided with through holes, the number of the first support lug (103) and the number of the fourth support lug (106) are two, and the inner walls of the through holes of the sixth support lug (302) and the fifth support lug (202) are provided with internal threads.
3. A projection lens focusing apparatus according to claim 1, wherein: the inside of first journal stirrup (103) through-hole is run through thick accurate burnt hob (6) through the bearing, the first worm (601) of one end fixedly connected with of the surface of thick accurate burnt hob (6), the other end of the surface of thick accurate burnt hob (6) is equipped with first anti-skidding line (602), run through the bearing in the through-hole of second journal stirrup (104) has first screw rod (4), the first turbine (5) of one end fixedly connected with of the surface of first screw rod (4), just first worm (601) and first turbine (5) adaptation, the other end of first screw rod (4) runs through fifth journal stirrup (202), and is equipped with the internal thread with first screw rod (4) adaptation in the through-hole of fifth journal stirrup (202).
4. A projection lens focusing apparatus according to claim 3, wherein: the inner part of the through hole of the fourth support lug (106) is penetrated with a fine focusing screw rod (9) through a bearing, one end of the outer surface of the fine focusing screw rod (9) is fixedly connected with a second worm (901), the other end of the outer surface of the fine focusing screw rod (9) is provided with a second anti-skid thread (902), the through hole of the third support lug (105) is penetrated with a second screw rod (7) through a bearing, one end of the outer surface of the second screw rod (7) is fixedly connected with a second turbine (8), the second worm (901) is matched with the second turbine (8), the other end of the second screw rod (7) is penetrated with a third support lug (105), and an internal thread matched with the second screw rod (7) is arranged in the through hole of the sixth support lug (302).
5. A projection lens focusing apparatus according to claim 1, wherein: the inner surfaces of the first groove (101) and the second groove (102) are both provided with threads, the first groove (101) is in threaded connection with a first guide rod (11), and the second groove (102) is in threaded connection with a second guide rod (10).
6. A projection lens focusing apparatus according to claim 1, wherein: the inner wall of the lens group lens barrel (1) is clamped with a lens group (107), the inner wall of the rear lens group lens barrel (2) is clamped with a rear lens group (204), and the inner wall of the front lens group lens barrel (3) is clamped with a front lens group (303).
7. The projection lens focusing apparatus of claim 4, wherein: the thread pitch of the second screw (7) is one third of the thread pitch of the first screw (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120097263.4U CN214311260U (en) | 2021-01-14 | 2021-01-14 | Focusing device of projection lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120097263.4U CN214311260U (en) | 2021-01-14 | 2021-01-14 | Focusing device of projection lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214311260U true CN214311260U (en) | 2021-09-28 |
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ID=77825005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120097263.4U Active CN214311260U (en) | 2021-01-14 | 2021-01-14 | Focusing device of projection lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214311260U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116243542A (en) * | 2023-05-12 | 2023-06-09 | 广州鲜柚智能科技有限公司 | Projector with automatic obstacle avoidance function |
| CN116849583A (en) * | 2023-06-30 | 2023-10-10 | 北理工郑州智能科技研究院 | Electric focusing device for endoscope |
-
2021
- 2021-01-14 CN CN202120097263.4U patent/CN214311260U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116243542A (en) * | 2023-05-12 | 2023-06-09 | 广州鲜柚智能科技有限公司 | Projector with automatic obstacle avoidance function |
| CN116849583A (en) * | 2023-06-30 | 2023-10-10 | 北理工郑州智能科技研究院 | Electric focusing device for endoscope |
| CN116849583B (en) * | 2023-06-30 | 2024-06-11 | 北理工郑州智能科技研究院 | Electric focusing device for endoscope |
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