Position adjustment mechanism and infrared imaging device

Abstract

The present invention belongs to the technical field of optoelectronic equipment, and discloses a position adjustment mechanism and an infrared imaging device. The position adjustment mechanism includes a fixed frame, a mobile frame, a guide assembly, a connecting assembly and a driving screw. The mobile frame is located above the fixed frame; one side of the mobile frame is connected to the fixed frame through a guide assembly, and the guide assembly is used to limit the movement of the mobile frame along a third direction; the axis of the driving screw extends along the third direction, and the driving screw is transmission-connected to the other side of the mobile frame through the connecting assembly to drive the mobile frame to move along the third direction. The connecting assembly of the present invention can enable the driving screw to move a limited distance relative to the mobile frame in the first direction and the second direction, so as to release the bending stress generated when the driving screw is installed in an offset position, so that the driving screw can keep extending along the third direction without bending, thereby reducing the installation accuracy requirements and improving the production efficiency and product yield.

Description

Technical Field

[0001] The present invention relates to the technical field of optoelectronic equipment, and in particular to a position adjustment mechanism and an infrared imaging device. Background Art

[0002] The infrared imaging device mainly converts the invisible infrared energy emitted by an object into a visible thermal image through the cooperation of an infrared detector and a lens group. Among them, the distance between the infrared detector and the lens group is mainly adjusted by a position adjustment mechanism.

[0003] like Figure 1 As shown, the position adjustment mechanism of the existing infrared imaging device mainly includes a fixed frame 1' and a mobile frame 2'. Among them, the infrared detector is installed on the mobile frame 2', the lens group is installed on the fixed frame 1', one end of the mobile frame 2' is connected to a slider 4', the slider 4' is plugged into the slide rail 3', the slide rail 3' is fixed to the fixed frame 1' along the third direction, and the mobile frame 2' basically cannot swing relative to the fixed frame 2', but can only move up and down along the slide rail 3' relative to the fixed frame 1', so as to adjust the distance between the mobile frame 2' and the fixed frame 1'. In addition, it is also provided with a stepping motor 6' and a driving screw 5' for driving the mobile frame 2' to move. The stepper motor 6' is fixedly mounted on the fixed frame 1', and the end of the driving screw 5' not connected to the stepper motor 6' is rotatably mounted at the mounting position 7' ​​on the fixed frame 1', and the axis of the driving screw 5' extends along the third direction to maintain parallelism with the slide rail 3'. A threaded hole is provided on the other side of the mobile frame 2', and the driving screw 5' is inserted into the threaded hole. The driving screw 5' can drive the mobile frame 2' to approach or move away from the fixed frame 1' by rotating.

[0004] In order to ensure that the mobile frame 2' can move smoothly along the third direction, it is necessary to maintain a high degree of parallelism between the driving screw 5' and the slide rail 3'. However, during actual assembly, due to the large installation error, it is easy to cause the driving screw 5' installed on the fixed frame 1' and the center of the threaded hole on the mobile frame 2' to be not coaxial (that is, the driving screw 5' is installed offset). At this time, the driving screw 5' is installed on the fixed frame 1', and the axis of the driving screw 5' extends along the third direction, and its position is fixed. The mobile frame 2' is plugged into the driving screw 5', and the threaded hole of the mobile frame 2' is not coaxial with the driving screw 5' (that is, the driving screw 5' is installed offset), which will cause the driving screw 5' to be subjected to bending stress and bend to a certain extent, and the driving screw 5' is easily aggravated when the driving screw 5' rotates, reducing its service life. At the same time, during actual assembly, in order to ensure that the threaded hole of the movable frame 2' and the driving screw 5' are coaxial, higher installation accuracy is required, but the actual installation error is difficult to control and it is difficult to ensure installation accuracy, thus resulting in low production efficiency and difficulty in ensuring product yield.

[0005] Therefore, there is an urgent need to provide a position adjustment mechanism and an infrared imaging device that can release the bending stress generated when the drive screw is installed in an offset manner, so that the drive screw can continue to extend along the third direction without bending, thereby reducing the installation accuracy requirements of the drive screw and improving production efficiency and product yield. Summary of the invention

[0006] One object of the present invention is to propose a position adjustment mechanism that can release the bending stress generated when the drive screw is installed in an offset manner, so that the drive screw can continue to extend along a third direction without bending, thereby reducing the installation accuracy requirements of the drive screw and improving production efficiency and product yield.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] A position adjustment mechanism, comprising:

[0009] Fixed frame;

[0010] A mobile frame, located above the fixed frame;

[0011] A guide assembly, one side of the mobile frame is connected to the fixed frame through the guide assembly, and the guide assembly is used to limit the mobile frame to move along the third direction;

[0012] A driving screw, the axis of which extends along the third direction;

[0013] A connecting component, wherein the driving screw is transmission-connected to the other side of the mobile frame through the connecting component to drive the mobile frame to move along the third direction, and the connecting component is configured to enable the driving screw to move a limited distance relative to the mobile frame along the first direction and the second direction, and any two of the first direction, the second direction and the third direction are perpendicular to each other.

[0014] Optionally, the connection component includes:

[0015] A nut, drivingly connected to the driving screw;

[0016] An annular ring is sleeved on the outer circumference of the nut, and the annular ring is movably connected to the movable frame and the nut respectively. The nut can move along the first direction relative to the annular ring, and the annular ring can move along the second direction relative to the movable frame.

[0017] Optionally, the connection component further includes:

[0018] The first latch is arranged along the first direction, and the first latch is inserted into the annular ring and the nut.

[0019] Optionally, the connection component further includes:

[0020] The second latch is arranged along the second direction, and the second latch is inserted into the annular ring and the movable frame.

[0021] Optionally, the number of the first pins and the number of the second pins are two respectively, the axes of the two first pins pass through the center of the nut, and the axes of the two second pins pass through the center of the annular ring.

[0022] Optionally, the number of the first latch and the number of the second latch are each one.

[0023] Optionally, the connecting assembly includes a third latch and a nut drivingly connected to the driving screw;

[0024] The nut is movably connected to the moving frame via the third latch, and the nut can move a limited distance relative to the moving frame along the first direction and the second direction.

[0025] Optionally, a third socket is provided on one of the movable frame and the nut along the first direction, and a waist-shaped through hole is provided on the other one opposite to the third socket, and the aperture of the waist-shaped through hole along the second direction is larger than the diameter of the third pin along the second direction, and one end of the third pin is fixedly inserted into the third socket, and the other end is slidably inserted into the waist-shaped through hole.

[0026] Optionally, an oil storage tank is provided on the connecting assembly, and the oil storage tank is used to store lubricating oil for lubricating the driving screw.

[0027] Another object of the present invention is to provide an infrared imaging device, in which a position adjustment mechanism arranged inside can release the bending stress generated when the driving screw is installed in an offset manner, so that the driving screw can continue to extend along a third direction without bending, thereby reducing the installation accuracy requirements of the driving screw and improving production efficiency and product yield.

[0028] To achieve this object, the present invention adopts the following technical solutions:

[0029] An infrared imaging device comprises the above-mentioned position adjustment mechanism.

[0030] The beneficial effects of the present invention are:

[0031] The position adjustment mechanism provided by the present invention has a movable frame located above a fixed frame. One side of the movable frame is connected to the fixed frame via a guide assembly, and the guide assembly is used to limit the movable frame to move along a third direction. The axis of the driving screw extends along the third direction, and the driving screw is transmission-connected to the other side of the movable frame via a connecting assembly to drive the movable frame to move along the third direction, and the connecting assembly can move the driving screw relative to the movable frame along the first direction and the second direction by a limited distance to release the bending stress generated when the driving screw is installed in an offset position, so that the driving screw keeps extending along the third direction without bending, thereby reducing the installation precision requirements and improving the production efficiency and product yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a cross-sectional view of a position adjustment mechanism in the prior art;

[0033] Figure 2 is a cross-sectional view of the position adjustment mechanism provided by the present invention;

[0034] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0035] Figure 4 is a disassembled view of the position adjustment mechanism provided by the present invention;

[0036] Figure 5 It is a partial cross-sectional view of the connection relationship between the connection assembly and the connection part provided by the present invention;

[0037] Figure 6 It is a partial cross-sectional view of the position of the connecting component in an embodiment of the present invention in which a through groove is provided on the connecting portion of the mobile frame;

[0038] Figure 7 is a partial cross-sectional view of the connection component position in an embodiment of the connection component provided by the present invention, which is a nut and a third latch;

[0039] Figure 8 It is a partial cross-sectional view of the position of the connecting component in an embodiment of the connecting component provided by the present invention in which an oil storage tank is provided.

[0040] In the figure:

[0041] X-first direction; Y-second direction; Z-third direction;

[0042] 1'-fixed frame; 2'-movable frame; 3'-slide rail; 4'-slider; 5'-driving screw; 6'-stepping motor; 7'-installation position;

[0043] 1-fixed frame; 2-movable frame; 21-connecting part; 3-guide assembly; 4-driving screw; 5-nut; 6-annular ring; 7-first pin; 8-second pin; 9-third pin; 10-oil storage tank; 11-stepping motor. DETAILED DESCRIPTION

[0044] In order to make the technical problem solved by the present invention, the technical solution adopted and the technical effect achieved more clearly, the technical solution of the present invention is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0045] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0047] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0048] like Figure 2-4As shown, a position adjustment mechanism provided in this embodiment is mainly installed in optoelectronic equipment such as infrared imaging devices. The main function of the position adjustment mechanism in the infrared imaging device is to adjust the distance between the infrared detector and the lens group to realize the focus setting of the infrared imaging device. In the figure, the X direction is the first direction, the Y direction is the second direction, and the Z direction is the third direction. The first direction, the second direction and the third direction are perpendicular to each other. The position adjustment mechanism includes a fixed frame 1, a mobile frame 2, a guide assembly 3, a drive screw 4 and a connecting assembly. Among them, the lens group is installed on the fixed frame 1, the mobile frame 2 is located above the fixed frame 1, the infrared detector is installed on the mobile frame 2, and one side of the mobile frame 2 is connected to the fixed frame 1 through the guide assembly 3, and the guide assembly 3 is used to limit the mobile frame 2 to move along the third direction. The other side of the mobile frame 2 is connected to the drive screw 4 through the connecting assembly, and the axis of the drive screw 4 extends along the third direction. The drive screw 4 is connected to the output end of the stepping motor 11. Driven by the stepper motor 11, the driving screw 4 can drive the mobile frame 2 to move along the third direction to achieve the purpose of adjusting the distance between the fixed frame 1 and the mobile frame 2, and the connecting component in this embodiment can enable the driving screw 4 to move a limited distance relative to the mobile frame 2 along the first direction and the second direction.

[0049] This embodiment changes the direct threaded connection between the driving screw 4 and the mobile frame 2 in the prior art into a movable connection through a connecting assembly. During actual assembly, the driving screw 4 is mounted on the fixed frame 1, and the driving screw 4 is connected to the mobile frame 2 through the connecting assembly. When the installation positions of the driving screw 4 and the mobile frame 2 are relatively offset, the connecting assembly can move the driving screw 4 relative to the mobile frame 2 in the first direction and the second direction by a limited distance to release the bending stress, thereby keeping the driving screw 4 extending in the third direction without bending, which reduces the installation accuracy requirements of the driving screw 4, the mobile frame 2 and the guide assembly 3, and improves the production efficiency and product yield of the position adjustment mechanism.

[0050] Specifically, if Figure 4 As shown, in this embodiment, the guide assembly includes a guide rail and a slider, the guide rail is fixedly installed on one side of the fixed frame 1 along the third direction, the slider is slidably plugged into the guide rail, and one side of the mobile frame 2 is fixedly connected to the slider. In other embodiments, the guide assembly can also be a guide column, the guide column is a cylindrical column, the guide column is fixedly installed on the fixed frame 1 along the third direction, and a socket matching the shape and size of the guide column is opened on one side of the mobile frame 2, and the guide column passes through the socket, so that the mobile assembly can slide along the axial direction of the guide column, which can also play a role in limiting the movement of the mobile frame 2 along the third direction.

[0051] In order to realize that the connecting assembly can make the driving screw 4 move a limited distance relative to the moving frame 2 along the first direction and the second direction, so as to keep the driving screw 4 extending along the third direction without bending. Figure 4-5 As shown, in this embodiment, the connecting assembly includes a nut 5 and an annular ring 6. The nut 5 is drivingly connected to the driving screw 4. The annular ring 6 is sleeved on the outer periphery of the nut 5. The annular ring 6 is movably connected to the moving frame 2 and the nut 5 respectively, and the nut 5 can move relative to the annular ring 6 in a first direction, and the annular ring 6 can move relative to the moving frame 2 in a second direction.

[0052] Specifically, if Figure 5 As shown, an annular ring 6 is movably sleeved on the outer periphery of the nut 5, and the spacing distance between the nut 5 and the annular ring 6 is 1-2mm when the nut 5 and the annular ring 6 are coaxial. In this embodiment, the spacing distance between the nut 5 and the annular ring 6 is 1.5mm when the nut 5 and the annular ring 6 are coaxial. At the same time, a connecting portion 21 is provided on the movable frame 2, and a circular through hole is opened on the connecting portion 21 along the third direction. The annular ring 6 is inserted into the circular through hole of the connecting portion 21 at intervals, and the spacing distance between the annular ring 6 and the circular through hole of the connecting portion 21 is 1-2mm when the annular ring 6 and the circular through hole of the connecting portion 21 are coaxial. In this embodiment, the nut 5 and the movable frame 2 are movably connected by the annular ring 6, so that the driving screw 4 can move a limited distance relative to the movable frame 2 along the first direction and the second direction, and then the bending stress on the driving screw 4 caused by the offset installation of the driving screw 4 can be released, so as to keep the driving screw 4 extending along the third direction without bending.

[0053] In this embodiment, in order to realize the movable connection between the annular ring 6 and the nut 5, as shown in FIG. Figure 5 As shown, the connection assembly also includes a first latch 7. The first latch 7 is arranged along the first direction, and the first latch 7 is plugged into the annular ring 6 and the nut 5, so that the nut 5 can move relative to the annular ring 6 along the first direction. Specifically, a first sliding hole is provided on the annular ring 6 along the first direction, and a first plug hole is provided on the nut 5 opposite to the first sliding hole. One end of the first latch 7 is plugged into the first plug hole by interference fit, and the other end of the first latch 7 is slidably plugged into the first sliding hole, and the outer peripheral wall of one end of the first latch 7 slidably plugged into the first sliding hole is abutted against the inner peripheral wall of the first sliding hole, so that the first latch 7 can only slide in the first sliding hole along the first direction, that is, the nut 5 has only one degree of freedom along the first direction relative to the annular ring 6.

[0054] At the same time, in order to realize the movable connection between the annular ring 6 and the movable frame 2, as shown in FIG. Figure 5As shown, the connection assembly also includes a second latch 8. The second latch 8 is arranged along the second direction, and the second latch 8 is plugged into the annular ring 6 and the movable frame 2, so that the annular ring 6 can move relative to the movable frame 2 along the second direction. Specifically, a second sliding hole is provided on the movable frame 2 along the second direction, and a second plug hole is provided on the annular ring 6 directly opposite to the second sliding hole. One end of the second latch 8 is plugged into the second plug hole by interference fit, and the other end of the second latch 8 is slidably plugged into the second sliding hole, and the outer peripheral wall of one end of the second latch 8 slidably plugged into the second sliding hole is abutted against the inner peripheral wall of the second sliding hole, so that the second latch 8 can only slide in the second sliding hole along the second direction, that is, the annular ring 6 has only one degree of freedom along the second direction relative to the movable frame 2.

[0055] like Figure 5 As shown, in this embodiment, since the nut 5 is threadedly connected to the driving screw 4, the nut 5 is movably connected to the annular ring 6 through the first pin 7, and the nut 5 can move relative to the annular ring 6 along the first direction; and the annular ring 6 is movably connected to the connecting portion 21 of the movable frame 2 through the second pin 8, and the annular ring 6 can move relative to the movable frame 2 along the second direction, thereby enabling the nut 5 to move a limited distance along the first direction and the second direction relative to the movable frame 2, so as to avoid the problem in the prior art that when the threaded holes on the driving screw 4 and the movable frame 2 are not coaxial, the driving screw 4 is easily subjected to bending stress and bends, which is beneficial to improving the service life of the position adjustment mechanism, reducing the installation accuracy requirements of the driving screw 4, the movable frame 2 and the guide assembly 3, and thereby improving the assembly yield and assembly efficiency of the position adjustment mechanism.

[0056] Furthermore, since the driving screw 4 also plays a role of bearing and supporting the mobile frame 2, in order to make the force of the mobile frame 2 acting on the driving screw 4 through the connecting assembly more balanced, the internal thread of the nut 5 can better match the external thread of the driving screw 4, so as to better ensure the smoothness of the driving screw 4 rotating to drive the mobile frame 2 to move. Figure 5 As shown, there are two first latch pins 7 and two second latch pins 8, respectively, and the axes of the two first latch pins 7 pass through the center of the nut 5, and the axes of the two second latch pins 8 pass through the center of the annular ring 6. Since the first latch pins 7 are distributed on both sides of the nut 5 along the first direction, and the second latch pins 8 are distributed on both sides of the annular ring 6 along the second direction, the force of the mobile frame 2 on the driving screw 4 is more balanced, so that the internal thread of the nut 5 can better match the external thread of the driving screw 4, and the smoothness of the driving screw 4 rotating to drive the mobile frame 2 to move can be better ensured.

[0057] In addition, in other embodiments, the number of the first pin 7 and the second pin 8 can also be one respectively, which can also avoid the problem in the prior art that when the threaded holes on the driving screw 4 and the movable frame 2 are not coaxial, the driving screw 4 is easily subjected to bending stress and bends. The structure is relatively simple and the design cost is low.

[0058] In addition, although in this embodiment, the connecting portion 21 receives the annular ring 6 through a circular through hole. Figure 6 As shown, in other embodiments, the shape of the connecting portion 21 may also be a C-shape, that is, a through groove is opened on the connecting portion 21 along the third direction, the annular ring 6 is spaced apart in the through groove of the connecting portion 21, one end of the second pin 8 is interference-plugged into the annular ring 6 along the second direction, and the other end of the second pin 8 is movably plugged into the connecting portion 21 along the second direction, which can also achieve the effect of limiting the movement of the annular ring 6 to a limited distance along the second direction relative to the connecting portion 21 of the movable frame 2.

[0059] In addition, the connection assembly in this embodiment includes a nut 5, an annular ring 6, a first latch 7 and a second latch 8. The nut 5 can move relative to the annular ring 6 in a first direction, and the annular ring 6 can move relative to the connecting portion 21 of the mobile frame 2 in a second direction, thereby realizing the movement of the driving screw 4 relative to the mobile frame 2 in the first direction and the second direction. However, in other embodiments, the connection assembly can also be designed as other structures. Figure 7 As shown, the connecting assembly consists of a third latch 9 and a nut 5 drivingly connected to the driving screw 4. The nut 5 is movably connected to the moving frame 2 through the third latch 9, and the nut 5 can move a limited distance relative to the moving frame 2 along the first direction and the second direction.

[0060] Specifically, if Figure 7 As shown, a third socket is provided on the nut 5 along the second direction, a waist-shaped through hole is provided on the connecting portion 21 of the movable frame 2 opposite to the third socket, and the aperture of the waist-shaped through hole along the second direction is larger than the diameter of the third pin 9 along the second direction, one end of the third pin 9 is plugged into the third socket, and the other end of the third pin 9 is slidably plugged into the waist-shaped through hole.

[0061] During actual assembly, when the installation position of the driving screw 4 relative to the connecting portion 21 of the mobile frame 2 deviates, since the nut 5 can move a limited distance in the first direction and the second direction relative to the mobile frame 2 to correct the installation deviation, the bending stress that causes the driving screw 4 to bend can be released to keep the driving screw 4 extending along the third direction without bending. However, since the third latch 9 is directly slidably inserted in the waist-shaped through hole, the nut 5 can not only move relative to the mobile frame 2 along the first direction and the second direction, but also rotate around its own axis at a certain angle, that is, the nut 5 has three degrees of freedom of moving along the first direction and the second direction and rotating around its own axis. Therefore, in actual use, the rotation of the nut 5 itself will reduce the transmission accuracy of the driving screw 4, thereby affecting the position adjustment accuracy of the driving screw 4 to the mobile frame 2. In this embodiment, the connection assembly adopts the design structure of the nut 5, the annular ring 6, the first latch 7 and the second latch 8, which can make the nut 5 only move a certain distance in the first direction and the second direction relative to the mobile frame 2 without rotating, thereby not affecting the position adjustment accuracy of the driving screw 4 to the mobile frame 2.

[0062] Furthermore, in order to reduce the friction resistance between the driving screw 4 and the nut 5, as Figure 8 As shown, in other embodiments, an oil storage tank 10 is further provided on the connection assembly, and the oil storage tank 10 can store lubricating oil for lubricating the driving lead screw 4. Specifically, the oil storage tank 10 is provided on the nut 5, and the oil storage tank 10 is connected to the threaded hole of the nut 5, and the lubricating oil can directly contact the outer wall of the driving lead screw 4, thereby lubricating, so as to reduce the friction resistance between the driving lead screw 4 and the nut 5, and improve the service life.

[0063] The present invention also provides an infrared imaging device, which includes a position adjustment mechanism provided in this embodiment. The movable frame 2 of the position adjustment mechanism is movably connected to the driving screw 4 through a connecting assembly, thereby avoiding the problem in the prior art that when the threaded holes on the driving screw 4 and the movable frame 2 are not coaxial, the driving screw 4 is easily bent due to bending stress. This is beneficial to improving the service life of the position adjustment mechanism, reducing the installation accuracy requirements of the driving screw 4, the movable frame 2 and the guide assembly 3, and thereby improving the product yield and production efficiency.

[0064] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The content of this specification should not be understood as limiting the present invention.

Claims

1. A position adjustment mechanism, characterized in that: include: Fixed frame (1); A movable frame (2) is located above the fixed frame (1); A guide assembly (3), one side of the movable frame (2) is connected to the fixed frame (1) via the guide assembly (3), and the guide assembly (3) is used to limit the movable frame (2) to move along a third direction; A driving screw (4), the axis of which extends along the third direction; A connecting assembly, wherein the driving screw (4) is transmission-connected to the other side of the mobile frame (2) through the connecting assembly to drive the mobile frame (2) to move along the third direction, and the connecting assembly is configured to enable the driving screw (4) to move a predetermined distance relative to the mobile frame (2) along a first direction and a second direction, and any two of the first direction, the second direction and the third direction are perpendicular to each other; The connection component comprises: A nut (5) drivingly connected to the driving screw (4); an annular ring (6) sleeved on the outer circumference of the nut (5); the annular ring (6) is movably connected to the movable frame (2) and the nut (5) respectively; the nut (5) can move relative to the annular ring (6) along the first direction; and the annular ring (6) can move relative to the movable frame (2) along the second direction; The connecting assembly further comprises: a first latch (7) arranged along the first direction, the first latch (7) being inserted into the annular ring (6) and the nut (5); The connecting assembly further comprises: a second latch (8) arranged along the second direction, the second latch (8) being plugged into the annular ring (6) and the movable frame (2); The number of the first latch pin (7) and the number of the second latch pin (8) are two respectively, the axes of the two first latch pins (7) pass through the center of the nut (5), and the axes of the two second latch pins (8) pass through the center of the annular ring (6); or the number of the first latch pin (7) and the number of the second latch pin (8) are one respectively; The connecting assembly further comprises a third latch pin (9) and a nut (5) drivingly connected to the driving screw (4); the nut (5) is movably connected to the moving frame (2) via the third latch pin (9), and the nut (5) can move a limited distance relative to the moving frame (2) along the first direction and the second direction; A third plug hole is provided on one of the movable frame (2) and the nut (5) along the first direction, and a waist-shaped through hole is provided on the other of the movable frame (2) and the nut (5) opposite to the third plug hole, and the diameter of the waist-shaped through hole along the second direction is larger than the diameter of the third plug pin (9) along the second direction, and one end of the third plug pin (9) is fixedly inserted into the third plug hole, and the other end is slidably inserted into the waist-shaped through hole; An oil storage tank (10) is provided on the connection assembly, and the oil storage tank (10) is used to store lubricating oil for lubricating the driving screw (4).

2. An infrared imaging device, characterized in that: It comprises the position adjustment mechanism as claimed in claim 1.

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