CN209746245U - Automatic focusing device for infrared lens - Google Patents
Automatic focusing device for infrared lens Download PDFInfo
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- CN209746245U CN209746245U CN201920413123.6U CN201920413123U CN209746245U CN 209746245 U CN209746245 U CN 209746245U CN 201920413123 U CN201920413123 U CN 201920413123U CN 209746245 U CN209746245 U CN 209746245U
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Abstract
The utility model discloses an infrared camera lens automatic focusing device, including base, removal focusing ring and driving ring, it includes focusing section and removal section to remove the focusing ring, be equipped with spacing portion between focusing section and the removal section, the outer wall of removal section be equipped with the external screw thread that the driving ring is connected, it is equipped with a spring to remove the section cover, the spring sets up between the terminal surface of spacing portion and driving ring, be equipped with the restriction on the base remove focusing ring left and right sides pivoted stop gear. The utility model discloses an infrared camera lens automatic focusing device utilizes the elasticity elimination of spring to remove between focusing ring and the driving ring because adopt the clearance of threaded connection production, prevents that the camera lens from appearing the virtual position when focusing for the focusing is more accurate effective.
Description
Technical Field
The utility model relates to an automatic focusing field, concretely relates to infrared camera lens automatic focusing device.
background
Optical imaging equipment is very high to the requirement of accuracy, and current automatic focusing device reduces rocking of camera lens for steady, generally adopts to rotate the screw thread and promotes to move the focusing ring and do axial displacement. However, although the screw thread pushing is stable, a gap is generated between the focusing ring and the driving ring in the focusing process, which causes a lens false position and a situation of inaccurate focusing.
disclosure of Invention
Aiming at the problem that a gap is generated between a focusing ring and a transmission ring in the focusing process of the infrared lens automatic mechanism focusing device in the prior art, the infrared lens automatic mechanism focusing device utilizes the elasticity of a spring to eliminate the gap and prevent the lens from generating a virtual position.
The utility model provides a technical scheme that its technical problem adopted is: the utility model provides an infrared camera lens automatic focusing device, includes base, removal focusing ring and driving ring, be equipped with the lens hole on the base, removal focusing ring and driving ring are installed in the lens hole, the driving ring with removal focusing ring threaded connection, the driving ring can be relative the base rotates, the drive remove the focusing ring and be in axial motion is done in the lens hole, it includes focusing section and removal section to remove the focusing ring, be equipped with spacing portion between focusing section and the removal section, the outer wall of removal section be equipped with the external screw thread that the driving ring is connected, it is equipped with a spring to remove the section cover, the spring sets up between the terminal surface of spacing portion and driving ring, be equipped with the restriction on the base remove focusing ring left and right sides pivoted stop gear.
The utility model provides a technical scheme that its technical problem adopted further still includes:
the outer diameter of the focusing section is larger than that of the moving section, and the limiting part is a step formed between the focusing section and the moving section.
The base is provided with a pair of fixing screws for fixing the transmission ring, the fixing screws are symmetrically arranged on two sides of the base, the outer wall of the transmission ring is provided with a fixing groove matched with the screws, and the fixing screws penetrate through the base from the outer side of the base and are inserted into the fixing groove.
The external thread of the moving section is a multi-start thread, the transmission ring is provided with an internal thread matched with the thread, and the internal thread is also a multi-start thread.
The limiting mechanism is a limiting opening arranged on the wall of the lens hole, and a clamping block matched with the limiting opening to limit the left and right rotation of the movable focusing ring is arranged on the outer wall of the focusing section.
the limiting mechanism further comprises a limiting column, the limiting column is arranged on the base outside the limiting opening, the limiting column is arranged along the axial direction of the lens hole, a bayonet matched with the limiting column is arranged on the clamping block, and the limiting column is clamped in the bayonet.
And the inner wall of the bayonet is provided with a ridge for reducing the friction between the inner wall of the buckle and the cylindrical surface of the limiting column.
The base is provided with a mounting end used for mounting and connecting the infrared lens automatic focusing device to an infrared camera, a base cover plate is arranged in the mounting end, and the shape of the base cover plate is matched with an opening of the mounting end.
Infrared camera lens automatic focusing device is still including the drive ring pivoted drive assembly, drive assembly includes driving motor and drive gear group, driving motor pass through drive gear group with the drive ring is connected, drive ring outer wall be equipped with drive gear organizes the cingulum of meshing, driving motor installs on the base, drive gear group sets up on the base apron.
And a focusing internal thread is arranged on the inner wall of the focusing end and is a single-head thread.
The utility model has the advantages that: the utility model discloses an infrared camera lens automatic focusing device has add a big spring between the ring of moving focusing and the driving ring, utilizes the elasticity of spring to eliminate the clearance that produces because of adopting threaded connection between ring of moving focusing and the driving ring, prevents that the camera lens from appearing the virtual position when focusing, makes focusing more accurate effective; the threads for connecting the movable focusing ring and the transmission ring adopt multi-start threads, so that the speed of the telescopic displacement of the movable focusing ring is faster, the focusing efficiency is higher, the connection is stable, and the lens shakes less in the focusing process and is more stable.
The present invention will be further described with reference to the accompanying drawings and the detailed description.
Drawings
Fig. 1 is a schematic perspective view of an embodiment of an infrared lens automatic focusing apparatus of the present invention;
FIG. 2 is a schematic perspective view of the base of FIG. 1 with the base removed;
Fig. 3 is a schematic view of a top view structure of an embodiment of the automatic focusing apparatus for an infrared lens according to the present invention;
FIG. 4 is a schematic cross-sectional view along line AA';
Fig. 5 is an exploded schematic view of an embodiment of the automatic focusing apparatus for infrared lens according to the present invention;
In the figure, 1, a base, 11, a lens hole, 111, a limit opening, 12, a fixing screw, 13, a limit column, 14, a mounting end, 2, a movable focusing ring, 21, a focusing section, 22, a movable section, 23, a fixture block, 231, a bayonet, 2311, a convex edge, 3, a transmission ring, 31, a fixing groove, 32, a toothed belt, 4, a spring, 5, a base cover plate, 6, a driving motor, 7 and a transmission gear set.
Detailed Description
The embodiment is a preferred embodiment of the present invention, and other principles and basic structures are the same as or similar to those of the embodiment, and are within the protection scope of the present invention.
The embodiment of the utility model discloses an infrared camera lens automatic focusing device embodiment is shown with reference to fig. 1-5, including base 1, removal focusing ring 2, driving ring 3, spring 4, base cover plate 5, driving motor 6 and drive gear group 7. The base 1 is provided with a lens hole 11, the lens hole 11 is a through hole, and a lens of the infrared camera is arranged in the lens hole 11 when the infrared camera is used. A movable focusing ring 2 for adjusting the focal length of a lens and a driving ring 3 for pushing the movable focusing ring 2 are installed in a lens hole 11, and the driving ring 3 and the movable focusing ring 2 are connected through threads. The driving ring 3 is arranged inside the base 1, can rotate relative to the base 1, and drives the movable focusing ring 2 to move axially in the lens hole 11 through connecting threads with the movable focusing ring 2. The movable focusing ring 2 comprises a focusing section 21 and a moving section 22, the focusing section 21 is matched with the infrared lens, and when the movable focusing ring 2 moves axially, the infrared lens is driven to change the focal length; the moving section 22 is inserted in the transmission ring 3, the outer wall of the moving section is provided with an external thread connected with the transmission ring 3, and when the transmission ring 3 rotates, the moving focusing ring can move axially through the external thread. In order to absorb the clearance generated by the thread and avoid the influence of the lens virtual position on the focusing precision, a spring 4 is sleeved outside the moving section 22, a limiting part is arranged between the focusing section 21 and the moving section 22, and the position of the spring 4 is limited between the limiting part and the end surface of the upper end of the transmission ring 3. If the movable focusing ring 2 rotates along with the transmission ring 3, the transmission ring 3 cannot enable the movable focusing ring 2 to move axially, so that the rotation of the movable focusing ring must be limited, and the base 1 needs to be provided with a limiting mechanism for limiting the left-right rotation of the movable focusing ring 2.
In this embodiment, the position-limiting portion between the focusing section 21 and the moving section 22 is a step. In order to match the infrared lens, the outer diameter of the focusing section 21 of the present embodiment is larger than that of the moving section 22, so that a step is formed between the focusing section 21 and the moving section 22. The spring 4 is sleeved outside the moving section 22, one end of the spring is abutted to the step surface of the step position, the other end of the spring is abutted to the end surface of the upper end of the transmission ring 3, and the position of the spring is limited on the moving section 22 between the step position and the transmission ring.
In order to fix the transmission ring 3 and prevent the transmission ring from being displaced in the base 1, a pair of fixing screws 12 are arranged on the base 1, the fixing screws 12 are symmetrically arranged on two sides of the base 1, a fixing groove 31 matched with the screws is arranged on the outer wall of the transmission ring 3, and the fixing screws 12 penetrate through the base 1 from the outer side of the base 1 and are inserted into the fixing groove 31.
in order to make the moving speed of the movable focusing ring 2 faster and the focusing efficiency higher, the external thread of the movable section 22 is a multi-start thread, the transmission ring 3 is provided with an internal thread matched with the external thread, and the internal thread is also a multi-start thread. In this embodiment, the multiple threads used are eight threads, and multiple threads with different numbers of threads can be used according to the focusing accuracy and focusing speed required in actual production.
In this embodiment, the limiting mechanism is a limiting opening 111 formed in the hole wall of the lens hole 11, and a fixture block 23 which cooperates with the limiting opening 111 to limit the left and right rotation of the movable focusing ring 2 is arranged on the outer wall of the focusing section 21. The shape of the limit opening 111 is matched with the shape of the fixture block 23, the fixture block 23 is clamped in the limit opening 111, and the rotation of the movable focusing ring 2 is limited.
In order to more firmly limit the left-right rotation of the movable focus ring 2, in the embodiment, the limiting mechanism further comprises a limiting column 13. The limiting column 13 is a cylinder, is arranged on the base 1 outside the limiting opening 111 along the axial direction of the lens hole 11, is longer than the hole wall of the lens hole 11, is provided with a bayonet 231 matched with the limiting column 13 on the fixture block 23, and the limiting column 13 is clamped in the bayonet 231. When the movable focusing ring 2 moves to a position higher than the hole wall of the lens hole 11, the limiting column 13 continues to be clamped in the bayonet 231, and the rotation of the movable focusing ring 2 is limited. The length of the limiting column 13 can be set according to the moving limit of the movable focusing ring 2, so that the limiting effect of the limiting column 13 is guaranteed.
In order to avoid the situation that the movable focusing ring 2 is clamped when moving axially, the inner wall of the bayonet 231 is provided with a protruded ridge 2311 for reducing friction between the inner wall of the bayonet 231 and the cylindrical surface of the limiting column 13, so that the contact position between the clamping block 23 and the limiting column 13 is only the top of the protruded ridge 2311, and the friction force is reduced to the minimum. The protrusion 2311 is transversely disposed along the inner wall of the bayonet 231 and surrounds the stopper post 13.
The base 1 is provided with a mounting end 14 for mounting and connecting the infrared lens automatic focusing device to the infrared camera, and the shape of the mounting end 14 is a square shape matched with the shape of the infrared camera body. In order to avoid the mutual influence of the parts of the infrared camera and the infrared lens automatic focusing device and better fix the parts in the base 1, a base cover plate 5 is arranged in the mounting end 14, the shape of the base cover plate 5 is matched with the opening of the mounting end 14, and the parts such as the transmission ring 3 are fixed in the base 1.
The infrared lens automatic focusing device of this embodiment still includes drive ring 3 pivoted drive assembly, and drive assembly includes driving motor 6 and drive gear group 7, and driving motor 6 is connected with drive ring 3 through drive gear group 7, and 3 outer walls of drive ring are equipped with and drive gear group 7 meshed toothed belt 32, and driving motor 6 installs on base 1, and drive gear group 7 fixed mounting is on base 1 apron.
be equipped with the focusing internal thread on the inner wall of focusing section 21, can conveniently fix the infrared lens of infrared camera in focusing section 21, make things convenient for infrared lens automatic focusing device to adjust the focus of camera lens, the focusing internal thread of this embodiment is the single thread.
The utility model discloses an infrared camera lens automatic focusing device has add a big spring between the ring of moving focusing and the driving ring, utilizes the elasticity of spring to eliminate the clearance that produces because of adopting threaded connection between ring of moving focusing and the driving ring, prevents that the camera lens from appearing the virtual position when focusing, makes focusing more accurate effective; the threads for connecting the movable focusing ring and the transmission ring adopt multi-start threads, so that the speed of the telescopic displacement of the movable focusing ring is faster, the focusing efficiency is higher, the connection is stable, and the lens shakes less in the focusing process and is more stable.
Claims (10)
1. The automatic focusing device for the infrared lens is characterized by comprising a base (1), a movable focusing ring (2) and a transmission ring (3), wherein a lens hole (11) is formed in the base (1), the movable focusing ring (2) and the transmission ring (3) are installed in the lens hole (11), the transmission ring (3) is in threaded connection with the movable focusing ring (2), the transmission ring (3) can rotate relative to the base (1) to drive the movable focusing ring (2) to axially move in the lens hole (11), the movable focusing ring (2) comprises a focusing section (21) and a moving section (22), a limiting part is arranged between the focusing section (21) and the moving section (22), an external thread connected with the transmission ring (3) is arranged on the outer wall of the moving section (22), and a spring (4) is sleeved on the moving section (22), the spring (4) is arranged between the limiting part and the end face of the transmission ring (3), and a limiting mechanism for limiting the left-right rotation of the movable focusing ring (2) is arranged on the base (1).
2. The infrared lens automatic focusing apparatus according to claim 1, wherein an outer diameter of the focusing section (21) is larger than an outer diameter of the moving section (22), and the stopper is a step formed between the focusing section (21) and the moving section (22).
3. The infrared lens automatic focusing device according to claim 1, characterized in that a pair of fixing screws (12) for fixing the driving ring (3) are provided on the base (1), the fixing screws (12) are symmetrically provided on both sides of the base (1), fixing grooves (31) for fitting with the screws are provided on the outer wall of the driving ring (3), and the fixing screws (12) are inserted into the fixing grooves (31) from the outside of the base (1) through the base (1).
4. The infrared lens autofocus apparatus according to claim 1, wherein the external thread of the moving section (22) is a multi-start thread, and the driving ring (3) has an internal thread that mates with the external thread, and the internal thread is a multi-start thread.
5. The infrared lens automatic focusing device according to claim 1, wherein the limiting mechanism is a limiting opening (111) provided on the wall of the lens hole (11), and a block (23) cooperating with the limiting opening (111) to limit the left and right rotation of the movable focusing ring (2) is provided on the outer wall of the focusing section (21).
6. The automatic focusing device of an infrared lens according to claim 5, wherein the limiting mechanism further comprises a limiting post (13), the limiting post (13) is disposed on the base (1) outside the limiting opening (111), the limiting post (13) is disposed along the axial direction of the lens hole (11), a bayonet (231) matched with the limiting post (13) is disposed on the fixture block (23), and the limiting post (13) is clamped in the bayonet (231).
7. The infrared lens automatic focusing apparatus according to claim 6, wherein a ridge (2311) for reducing friction between the inner wall of the bayonet (231) and the cylindrical surface of the stopper post (13) is provided on the inner wall of the bayonet (231).
8. The infrared lens autofocus apparatus according to claim 1, wherein the base (1) has a mounting end (14) for mounting the infrared lens autofocus apparatus to an infrared camera, and a base cover plate (5) is provided in the mounting end, and the base cover plate (5) has a shape that fits an opening of the mounting end (14).
9. The infrared lens automatic focusing device according to claim 8, further comprising a driving assembly for driving the driving ring (3) to rotate, wherein the driving assembly comprises a driving motor (6) and a transmission gear set (7), the driving motor (6) is connected with the driving ring (3) through the transmission gear set (7), a toothed belt (32) meshed with the transmission gear set (7) is arranged on the outer wall of the driving ring (3), the driving motor (6) is mounted on the base (1), and the transmission gear set (7) is arranged on the cover plate of the base (1).
10. The infrared lens automatic focusing apparatus as set forth in claim 1, wherein said focusing segment (21) is provided on an inner wall thereof with a focusing internal thread, said focusing internal thread being a single start thread.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920413123.6U CN209746245U (en) | 2019-03-29 | 2019-03-29 | Automatic focusing device for infrared lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920413123.6U CN209746245U (en) | 2019-03-29 | 2019-03-29 | Automatic focusing device for infrared lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209746245U true CN209746245U (en) | 2019-12-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920413123.6U Active CN209746245U (en) | 2019-03-29 | 2019-03-29 | Automatic focusing device for infrared lens |
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| Country | Link |
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| CN (1) | CN209746245U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113671661A (en) * | 2021-08-19 | 2021-11-19 | 青岛睿维申信息科技有限公司 | Objective focusing mechanism |
| CN114666461A (en) * | 2020-12-22 | 2022-06-24 | 宁波舜宇光电信息有限公司 | Retractable camera module and electronic equipment |
| WO2024138997A1 (en) * | 2022-12-26 | 2024-07-04 | 常州赛乐医疗技术有限公司 | X-ray machine bunching cylinder fixing structure and handheld dental x-ray machine |
-
2019
- 2019-03-29 CN CN201920413123.6U patent/CN209746245U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114666461A (en) * | 2020-12-22 | 2022-06-24 | 宁波舜宇光电信息有限公司 | Retractable camera module and electronic equipment |
| CN114666461B (en) * | 2020-12-22 | 2023-08-29 | 宁波舜宇光电信息有限公司 | Telescopic camera module and electronic equipment |
| CN113671661A (en) * | 2021-08-19 | 2021-11-19 | 青岛睿维申信息科技有限公司 | Objective focusing mechanism |
| WO2024138997A1 (en) * | 2022-12-26 | 2024-07-04 | 常州赛乐医疗技术有限公司 | X-ray machine bunching cylinder fixing structure and handheld dental x-ray machine |
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