CN216595695U - Focusing mechanism and infrared equipment - Google Patents
Focusing mechanism and infrared equipment Download PDFInfo
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- CN216595695U CN216595695U CN202123147527.1U CN202123147527U CN216595695U CN 216595695 U CN216595695 U CN 216595695U CN 202123147527 U CN202123147527 U CN 202123147527U CN 216595695 U CN216595695 U CN 216595695U
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Abstract
The utility model relates to the technical field of lens focusing, and particularly provides a focusing mechanism and infrared equipment, wherein the focusing mechanism comprises: a support; a probe assembly slidably connected to the support; the guide rail assembly is arranged on the support and used for limiting the detector assembly; the driving assembly is arranged on the bracket; the drive assembly includes: the detector assembly is provided with a swinging block hinged to the support, a first waist-shaped hole is formed in the swinging block, a driving column is arranged on the detector assembly, and the driving column is connected in the first waist-shaped hole in a sliding mode; the stepping motor assembly is fixedly connected to the bracket and is used for driving the swinging block to swing; the focusing mechanism disclosed by the embodiment of the utility model can prevent the optical axis of the detector and the optical axis of the lens from being misaligned under the condition of simplifying the structure of the adjusting mechanism, thereby improving the imaging precision and reducing the manufacturing cost.
Description
Technical Field
The utility model relates to the technical field of lens focusing, in particular to a focusing mechanism and infrared equipment.
Background
The current focusing device is divided into two types, one type is that a detector is adopted to be fixed, focusing is carried out in a mode of moving a lens, the structure and the circuit design of the focusing mode are complex, the cost is high, the other type carries out focusing in a mode of rotating the lens, the imaging optical axis of the lens can rotate around the optical axis of the detector due to the processing errors of a lens and a mechanism part, and the imaging precision is low.
To address the above issues, the present application provides a focusing mechanism.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a focusing mechanism to solve the problems of low imaging precision and complex structure of the conventional lens focusing device.
In order to achieve the purpose, the utility model provides the following technical scheme:
a focus mechanism, comprising:
the bracket is used for mounting the lens;
a probe assembly slidably coupled to the support;
the driving assembly is arranged on the bracket and used for driving the detector assembly to slide on the bracket; wherein the drive assembly comprises:
the swinging block is hinged to the support and drives the detector assembly to slide on the support in the swinging process;
and the stepping motor assembly is fixedly connected to the support and is used for driving the swinging block to swing on the support.
Further, the focusing mechanism further includes:
and the guide rail assembly is arranged on the support and used for limiting the detector assembly so as to control the detector assembly to slide along the optical axis of the lens.
Further, the guide rail assembly includes:
the guide rail is fixedly connected to the support and is parallel to the optical axis of the lens;
and the sliding block is fixedly connected to the detector assembly and is connected to the guide rail in a sliding manner.
Further, the driving assembly further includes:
the swinging block is hinged to the mounting seat, and the stepping motor assembly is detachably connected to the mounting seat.
Furthermore, a first waist-shaped hole is formed in the swinging block, a driving column is arranged on the detector assembly, and the driving column is connected into the first waist-shaped hole in a sliding mode.
Further, the first kidney-shaped hole is arranged at the center of the swinging block.
Furthermore, the swing block is a sector plate, transmission teeth are uniformly distributed on the arc surface of the swing block along the circumferential direction, a gear is fixedly connected to an output shaft of the stepping motor assembly, and the gear is meshed with the transmission teeth.
Further, the focusing mechanism further includes:
and the sensing assembly is arranged on the bracket and the detector assembly and is used for sensing the position of the detector assembly.
Further, the sensing assembly includes:
the Hall sensor is fixedly connected to the bracket;
the magnetic grid is fixedly connected to the detector assembly, and when the magnetic grid moves under the driving of the detector assembly, induced current is generated in the Hall sensor.
The utility model also provides infrared equipment comprising the focusing mechanism, which comprises the focusing mechanism.
In conclusion, compared with the prior art, the utility model has the following beneficial effects:
1. the focusing mechanism disclosed by the embodiment of the utility model drives the detector assembly to move on the bracket in a mode of arranging the stepping motor assembly to drive the swinging block to swing, and limits the detector assembly through the guide rail assembly so as to enable the detector assembly to move along the optical axis.
2. The focusing mechanism disclosed by the embodiment of the utility model is also provided with the sensing assembly for recording the position of the imaging clear point, so that the rapid focusing of an imaging system is facilitated.
Drawings
Fig. 1 is a schematic overall structure diagram of a focusing mechanism disclosed by the utility model.
Fig. 2 is an exploded view of the focusing structure disclosed in the present invention.
Reference numerals: 1. a support; 11. a housing part; 12. a first guide rail seat; 13. a drive assembly seat;
2. a probe assembly; 21. a drive plate; 22. a drive column; 23. a grid groove; 24. a slider seat;
3. a guide rail assembly; 31. a guide rail; 32. a slider;
4. a drive assembly; 41. a mounting seat; 42. a swing block; 43. a stepper motor assembly; 44. a first kidney-shaped hole; 45. a limiting hole; 46. a limiting column;
5. a Hall sensor;
6. and (4) magnetic grids.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention belong to the protection scope of the present invention.
Example 1
As shown in fig. 1 and 2, the present embodiment provides a focusing mechanism including:
the support 1 is used for mounting a lens;
a detector assembly 2 slidably connected to the support 1;
the guide rail assembly 3 is arranged on the support 1 and used for limiting the detector assembly 2 so as to control the detector assembly to slide along the optical axis of the lens;
the driving assembly 4 is arranged on the support 1 and used for driving the detector assembly 2 to slide on the support 1; wherein the drive assembly 4 comprises:
a swing block 42 hinged on the support 1, wherein a first kidney-shaped hole 44 is arranged on the swing block 42, a driving column 22 is arranged on the detector assembly 2, and the driving column 22 is slidably connected in the first kidney-shaped hole 44;
the stepping motor assembly 43 is fixedly connected to the bracket 1 and is used for driving the swinging block 42 to swing on the bracket 1;
in this embodiment, a lens is mounted on the support 1, the track direction of the guide rail assembly 3 is parallel to the optical axis of the lens, the guide rail assembly 3 can control the detector assembly 2 to move on the support 1 along the optical axis of the lens, so as to prevent the optical axis on the support 1 from rotating around the optical axis of the lens, thereby improving the imaging accuracy, when the stepping motor assembly 43 is powered on, the stepping motor assembly 43 can drive the swing block 42 to swing on the support 1, when the swing block 42 swings, the first kidney-shaped hole 44 drives the driving column 22 to move, and due to the limit of the guide rail assembly 3, the guide rail assembly 3 can only move along the optical axis direction;
in the embodiment, the arrangement of the driving assembly 4 has the advantages of simple structure and low manufacturing cost compared with the existing adjusting structure;
in the embodiment, the holder 1 is provided with a receiving portion 11, the detector assembly 2 is slidably connected to the receiving portion 11, and a lens is arranged on a side of the holder 1 away from the detector assembly 2; the embodiment of the utility model achieves the purpose of focusing by fixing the lens and controlling the detector assembly 2 to move, and because the lens is fixed, the track of the detector assembly 2 is parallel to the optical axis under the limit of the guide rail assembly 3, thereby improving the imaging precision;
in some examples, the probe assembly 2 is composed of a fixing plate and a circuit board, the circuit board is fixedly connected to the fixing seat by riveting or screwing, a slider seat 24 is arranged on the probe assembly 2, and a first guide rail seat 12 is arranged on the support 1 and used for mounting the guide rail assembly 3;
as a preferred embodiment in this embodiment, the guide rail assembly 3 includes:
a guide rail 31 fixedly connected to the first guide rail base 12, wherein the guide rail 31 is parallel to the optical axis of the lens;
a slide block 32 fixedly connected to the slide block seat 24, wherein the slide block 32 is slidably connected to the guide rail 31;
in this embodiment, the guide rail 31 is an i-shaped guide rail, the sliding block 32 is provided with a T-shaped sliding slot, and the sliding block 32 is sleeved on the guide rail 31, so that the sliding block 32 can only slide on the guide rail 31; because the slider seat 24 is fixedly connected with the slider 32, when the detector assembly 2 moves, the motion tracks of the detector assembly 2 and the slider 32 are the same, so that the detector assembly 2 can slide along the guide rail 31 along with the slider 32, and because the guide rail 31 is fixedly connected to the guide rail seat 12, the motion track of the detector assembly 2 relative to the support 1 is unique, namely, the detector assembly 2 moves linearly along the guide rail 31, and because the guide rail 31 is parallel to the optical axis of the lens, the detector assembly 2 can only move along the optical axis of the lens;
it should be noted that, the slider seat 24 is fixedly connected to the probe assembly 2, in the prior art, since the probe assembly 2 includes not only the circuit board but also a bracket for fixing the circuit board, in this embodiment, the slider seat 24 is a component on the bracket for fixing the circuit board, and the slider seat 24 and the bracket for fixing the circuit board are an integral structure;
in some examples, the guide rail 31 is fixedly connected to the first rail housing 12 by screws, and the slider 32 is fixedly connected to the slider housing 24 by screws;
in some examples, the fixing plate is further provided with a driving plate 21, the driving column 22 is provided on the driving plate 21, the driving plate 21 and the slider seat 24 are provided on the side of the fixing plate, and the driving plate 21 and the slider seat 24 are symmetrical about the center of the fixing plate; it should be noted that the driving plate 21 and the slider seat 24 may also be arranged asymmetrically, and as a preferable case in the present embodiment, the driving plate 21 and the slider seat 24 are symmetrical with respect to the center of the fixing plate;
as a preferred embodiment in this embodiment, as shown in fig. 2, the driving assembly 4 further includes:
the mounting seat 41 is fixedly connected to the bracket 1, the swinging block 42 is hinged to the mounting seat 41, and the stepping motor assembly 43 is detachably connected to the mounting seat 41;
in this embodiment, the bracket 1 is further provided with a driving component seat 13, the driving component seat 13 is a side plate arranged at the edge of the bracket 1, the mounting seat 41 is detachably connected to the driving component seat 13 through a screw, and the swinging block 42 and the stepping motor assembly 43 are both mounted on the mounting seat 41, so that the driving component 4 is convenient to replace and maintain;
as a preferred embodiment in this embodiment, as shown in fig. 2, the swing block 42 is a fan-shaped plate, transmission teeth are uniformly distributed on an arc surface of the swing block 42 along a circumferential direction, a gear is fixedly connected to an output shaft of the stepping motor assembly 43, the gear is engaged with the transmission teeth, when the stepping motor assembly 43 is powered on to rotate, the stepping motor assembly 43 drives the swing block 42 to rotate through the gear, and by changing a current direction of the stepping motor assembly 43, a rotation direction of the gear can be changed, so that the rotation direction of the swing block 42 is changed, the swing block 42 can swing, the swing block 42 can drive the detector assembly 2 to move back and forth on the support 1, and a distance between the detector assembly 2 and a lens is changed;
preferably, the first kidney-shaped hole 44 is provided at a central position of the swing block 42;
in some examples, the stepper motor assembly 43 is removably connected to the mount 41 by a snap-fit arrangement;
as a preferred embodiment in this embodiment, the driving assembly 4 further includes:
a limit post 46 provided on the mount base 41;
a limiting hole 45 arranged on the swinging block 42, wherein the second limiting hole 45 is an arc-shaped hole with the circle center arranged on the hinged point of the swinging block 42 and the mounting seat 41, and the limiting column 46 is connected in the limiting hole 45 in a sliding manner;
the limiting hole 45 and the limiting post 46 play a role in limiting the swing block 42, when the swing block 42 swings, the limiting post 46 slides in the limiting hole 45, and when the limiting post 46 slides to two ends of the limiting hole 45, the limiting post 46 blocks the swing block 42 to continuously swing, so that the swing angle of the swing block 42 is limited;
preferably, the limiting hole 45 is a second kidney-shaped hole provided on the swing block 42.
Example 2
In one embodiment of the present invention, the swing block 42 and the stepping motor assembly 43 may also be driven by other structures, for example, the swing block 42 and the stepping motor assembly 43 may also be connected by a crank-rocker mechanism;
in this embodiment, a transmission shaft is fixedly connected to a transmission shaft of the stepping motor assembly 43, the transmission shaft is L-shaped, a long end of the transmission shaft is fixedly connected to an output shaft of the stepping motor assembly 43, one end of the transmission shaft, which is far away from the stepping motor assembly 43, is parallel to the output shaft of the stepping motor assembly 43, one end of the swing block 42, which is far away from a hinge point with the mounting seat 41, is provided with a third kidney-shaped hole, one end of the transmission shaft, which is far away from the stepping motor assembly 43, is slidably connected in the third kidney-shaped hole, and when the stepping motor assembly 43 is powered to rotate, one end of the transmission shaft, which is far away from the stepping motor assembly 43, slides in the third kidney-shaped hole and drives the swing block 42 to rotate;
preferably, the first kidney-shaped aperture 44 and the third kidney-shaped aperture are located on the same radius on the swing block 42, so that the trajectory of the detector assembly 2 is easy to calculate.
Example 3
As shown in fig. 1 and 2, as a further embodiment of the present invention, the focus adjustment mechanism further includes:
the sensing assemblies are arranged on the support 1 and the detector assembly 2 and are used for sensing the position of the detector assembly 2;
in this embodiment, the sensing assembly includes:
the Hall sensor 5 is fixedly connected to the bracket 1;
the magnetic grid 6 is fixedly connected to the detector component 2, when the magnetic grid 6 moves under the driving of the detector component 2, induced current is generated in the Hall sensor 5, the position of a lens imaging clear point can be read out through the induction component, so that an imaging system records the position of the imaging clear point, and when the definition of a lens is adjusted, the detector component 2 can be directly controlled to move to the recorded position of the imaging clear point, so that rapid focusing is realized;
in some examples, the driving plate 21 is further provided with a grid groove 23, the length direction of the grid groove 23 is parallel to the optical axis, and the magnetic grid 6 is fixedly connected into the grid groove 23 by means of screws or gluing;
it should be noted that the sensing assembly may also have other structures, for example, in some examples, the sensing assembly includes:
the pressure sensor is fixedly connected to the bracket 1;
fixed connection in compression spring on the detector subassembly 2, compression spring is the spring that appears, compression spring keeps away from detector subassembly 2's one end sets up on pressure sensor when detector subassembly 2 removes, compression spring's shape changes to make the pressure value on the pressure sensor change, the pressure size through pressure sensor can measure the length of department compression spring, and then the test detector subassembly 2 is in position on the support 1, the pressure size when the recording lens formation of image washs, just can take notes detector subassembly 2's focusing stroke.
Example 4
This embodiment provides an infrared apparatus including the focusing mechanism according to any one of embodiments 1 to 3 above.
In conclusion, the detector assembly is driven to move on the bracket in a mode of driving the swinging block to swing by the stepping motor assembly, and the detector assembly is limited by the guide rail assembly so as to move along the optical axis, so that the optical axis of the detector and the optical axis of the lens can be prevented from being misaligned under the condition of simplifying the structure of the adjusting mechanism, the imaging precision is improved, and the manufacturing cost is reduced; meanwhile, the position of the imaging clear point is recorded by the sensing assembly, so that the imaging system is facilitated to focus quickly.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A focus mechanism, comprising:
the bracket is used for mounting the lens;
a probe assembly slidably coupled to the support;
the driving assembly is arranged on the bracket and used for driving the detector assembly to slide on the bracket; wherein the drive assembly comprises:
the swinging block is hinged to the support and drives the detector assembly to slide on the support in the swinging process;
and the stepping motor assembly is fixedly connected to the support and is used for driving the swinging block to swing on the support.
2. The focus mechanism of claim 1, further comprising:
and the guide rail assembly is arranged on the support and used for limiting the detector assembly so as to control the detector assembly to slide along the optical axis of the lens.
3. The focusing mechanism of claim 2, wherein the rail assembly comprises:
the guide rail is fixedly connected to the bracket and is parallel to the optical axis of the lens;
and the sliding block is fixedly connected to the detector assembly and is connected to the guide rail in a sliding manner.
4. The focusing mechanism of claim 1, wherein the drive assembly further comprises:
the swinging block is hinged to the mounting seat, and the stepping motor assembly is detachably connected to the mounting seat.
5. The focusing mechanism of claim 1 wherein the wobble block has a first kidney-shaped aperture formed therein, the detector assembly has a drive post formed thereon, and the drive post is slidably coupled within the first kidney-shaped aperture.
6. The focusing mechanism of claim 5, wherein the first kidney aperture is disposed at a center position of the wobble block.
7. The focusing mechanism according to claim 1, wherein the oscillating block is a sector plate, transmission teeth are uniformly distributed on the arc surface of the oscillating block along the circumferential direction, and a gear is fixedly connected to an output shaft of the stepping motor assembly and meshed with the transmission teeth.
8. The focus mechanism of any of claims 1-7, further comprising:
and the sensing assembly is arranged on the bracket and the detector assembly and is used for sensing the position of the detector assembly.
9. The focusing mechanism of claim 8, wherein the sensing assembly comprises:
the Hall sensor is fixedly connected to the bracket;
the magnetic grid is fixedly connected to the detector assembly, and when the magnetic grid moves under the driving of the detector assembly, induced current is generated in the Hall sensor.
10. An infrared device comprising a focusing mechanism according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123147527.1U CN216595695U (en) | 2021-12-15 | 2021-12-15 | Focusing mechanism and infrared equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123147527.1U CN216595695U (en) | 2021-12-15 | 2021-12-15 | Focusing mechanism and infrared equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216595695U true CN216595695U (en) | 2022-05-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123147527.1U Active CN216595695U (en) | 2021-12-15 | 2021-12-15 | Focusing mechanism and infrared equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216595695U (en) |
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2021
- 2021-12-15 CN CN202123147527.1U patent/CN216595695U/en active Active
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