Infrared movement detector and thermal imager

Abstract

The utility model provides a kind of infrared movement and thermal imager, infrared movement includes lens, mounting seat and pre-tightening structure, the middle part of mounting seat has cavity, one end of lens is located in cavity, and is connected with mounting seat threadedly;Pre-tightening structure is arranged in cavity, pre-tightening structure has fixed part and abutting portion, fixed part is fixedly connected with mounting seat, and the end of abutting portion and lens is connected with mounting seat and is abutted, to exert pre-tightening force of far away from mounting seat to lens.By setting pre-tightening structure in the cavity of original mounting seat, and make abutting portion and lens abut, so it can exert an axial pre-tightening force to lens, improve the stability of connection between lens and mounting seat, ensure the definition of infrared movement imaging.Moreover, by pre-tightening structure replaces the variety of external auxiliary locking components, such as hoop, used in conventional scheme, reduces the occupation to space.

Description

Technical Field

[0001] This utility model relates to the field of infrared imaging technology, and more specifically, to an infrared core and a thermal imager. Background Technology

[0002] With the rapid development of infrared thermal imaging technology, it has been widely used in security monitoring, industrial inspection, and medical temperature measurement. As the core component of a thermal imaging system, the performance and stability of the infrared sensor directly determine the image quality and temperature measurement accuracy. To ensure clear imaging and consistent temperature measurement accuracy under complex environments such as high and low temperatures, shocks, and vibrations, the infrared sensor needs to possess excellent shock resistance.

[0003] However, in the existing technology, the lens of the infrared camera module is usually installed by screwing it into the lens mount. In order to prevent the lens from loosening due to vibration and impact during long-term use or transportation, which would cause problems such as optical axis misalignment and image defocusing, it is necessary to set external auxiliary structures such as clamps to fix the connection between the lens and the mount. This will increase the overall space occupied by the infrared camera module. Utility Model Content

[0004] This invention provides an infrared sensor and a thermal imager to solve the problem of large space occupation of infrared sensors in the prior art.

[0005] To address the aforementioned problems, according to one aspect of this utility model, an infrared camera mechanism is provided. The infrared camera mechanism includes a lens, a mounting base, and a pre-tightening structure. The mounting base has a cavity in its center, and one end of the lens is located within the cavity and threadedly connected to the mounting base. The pre-tightening structure is disposed within the cavity and has a fixing part and an abutting part. The fixing part is fixedly connected to the mounting base, and the abutting part abuts against the end of the lens connected to the mounting base to apply a pre-tightening force away from the mounting base to the lens.

[0006] Furthermore, the abutting part has a main body and multiple protruding structures, the multiple protruding structures are arranged circumferentially along the main body, and each of the multiple protruding structures abuts against the end of the lens that is connected to the mounting base.

[0007] Furthermore, the fixing part and the abutting part are an integral structure, or the fixing part and the abutting part are separate structures.

[0008] Furthermore, when the fixing part and the abutting part are separate structures, the fixing part is provided with a first groove at the end near the lens, and part of the abutting part is disposed in the first groove.

[0009] Furthermore, the inner wall of the first groove has a first positioning element, and the abutting part is provided with a second positioning element. The first positioning element and the second positioning element cooperate to position the abutting part.

[0010] Furthermore, the mounting base includes a lens mount and a support frame, which are fixedly connected. There is a cavity between the lens mount and the support frame, and the lens is threadedly connected to the lens mount.

[0011] Furthermore, the lens mount has a base, a first protruding section and a second protruding section, the first protruding section and the second protruding section are located at the two ends of the base respectively, the first protruding section abuts against the support frame, and the end of the lens near the lens mount is threadedly connected to the second protruding section.

[0012] Furthermore, the infrared mechanism also includes a first fastening structure and a second fastening structure. The lens mount has multiple first connecting holes and multiple second connecting holes. The multiple first connecting holes are distributed at intervals along the circumference of the lens mount, and the multiple second connecting holes are distributed at intervals along the circumference of the lens mount. Each first fastening structure passes through a first connecting hole and is threadedly connected to the fixing part. Each second fastening structure passes through a second connecting hole and is connected to the support frame.

[0013] Furthermore, the infrared sensor also includes a detector. A second groove is provided at the end of the support frame away from the lens, and the detector is placed in the second groove. Both the abutment part and the fixing part have through channels in the middle, which are used to connect the lens and the detector.

[0014] According to another aspect of the present invention, a thermal imager is provided, which includes the infrared core described above.

[0015] By applying the technical solution of this utility model, a pre-tightening structure is set within the cavity of the original mounting base, and the abutting part abuts against the lens. This applies an axial pre-tightening force to the lens, eliminating the axial clearance of the threaded connection between the lens and the mounting base, increasing the contact area between them, and thus improving the stability of the connection between the lens and the mounting base. This prevents problems such as optical axis misalignment and image defocusing caused by lens loosening due to vibration and impact, ensuring the clarity of infrared imaging. Moreover, the pre-tightening structure replaces various external auxiliary locking components such as clamps used in traditional solutions, and utilizes the internal cavity of the mounting base to set the pre-tightening structure within the cavity. This reduces the number of external parts, reduces space occupation, lowers the overall assembly difficulty, improves assembly efficiency, and reduces manufacturing and maintenance costs. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0017] Figure 1 A cross-sectional view of the infrared mechanism provided by this utility model is shown;

[0018] Figure 2 An exploded view of the infrared sensor provided by this utility model is shown;

[0019] Figure 3 It shows Figure 2 A schematic diagram of the pre-tensioning structure and lens mount.

[0020] The above figures include the following reference numerals:

[0021] 10. Lens; 20. Mounting base; 21. Lens mount; 211. Base; 212. First protrusion; 213. Second protrusion; 214. First connecting hole; 215. Second connecting hole; 22. Support frame; 221. Second groove; 30. Pre-tightening structure; 31. Fixing part; 311. First groove; 3111. First positioning element; 32. Abutting part; 321. Main body; 322. Protrusion structure; 323. Second positioning element; 40. First fastening structure; 50. Detector. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] like Figures 1 to 3 As shown, this utility model embodiment provides an infrared camera module, which includes a lens 10, a mounting base 20, and a pre-tightening structure 30. The mounting base 20 has a cavity in the middle, and one end of the lens 10 is located in the cavity and is threadedly connected to the mounting base 20. The pre-tightening structure 30 is disposed in the cavity and has a fixing part 31 and an abutting part 32. The fixing part 31 is fixedly connected to the mounting base 20, and the abutting part 32 abuts against the end of the lens 10 connected to the mounting base 20 to apply a pre-tightening force away from the mounting base 20 to the lens 10.

[0024] In this embodiment, by setting a pre-tightening structure 30 within the cavity of the original mounting base 20 and abutting the abutment portion 32 against the lens 10, an axial pre-tightening force is applied to the lens 10. This eliminates the axial clearance of the threaded connection between the lens 10 and the mounting base 20, increases the contact area between them, and thus improves the stability of the connection between the lens 10 and the mounting base 20. This prevents the lens 10 from loosening due to vibration or impact, which could lead to optical axis misalignment or image defocusing, ensuring the clarity of the infrared imaging. Furthermore, the pre-tightening structure 30 replaces various external auxiliary locking components such as clamps used in traditional solutions. By utilizing the internal cavity of the mounting base 20 and placing the pre-tightening structure 30 within the cavity, the number of external parts is reduced, space occupancy is reduced, the overall assembly difficulty is lowered, assembly efficiency is improved, and manufacturing and maintenance costs are reduced.

[0025] like Figure 3 As shown, the abutting part 32 has a main body 321 and a plurality of protruding structures 322. The plurality of protruding structures 322 are arranged circumferentially along the main body 321, and the plurality of protruding structures 322 abut against the end of the lens 10 that is connected to the mounting base 20.

[0026] In this embodiment, multiple protrusions 322 are evenly arranged along the circumference of the main body 321, so that while the pre-tightening structure 30 applies axial pre-tightening force to the end face of the lens 10, it can also form multi-point balanced support in the circumferential direction, avoiding the problem of local stress concentration, preventing tilting or deformation caused by uneven force on the end face of the lens 10, thereby ensuring that the optical axis of the lens 10 is consistent with the optical center of the mechanism, and improving assembly stability and alignment accuracy.

[0027] Furthermore, the fixing part 31 and the abutting part 32 can be an integral structure, or they can be separate structures. This allows the pre-tightening structure 30 to be flexibly configured according to different movement sizes, installation spaces, and assembly requirements. When an integral structure is used, there is no gap between the fixing part 31 and the abutting part 32, forming a complete overall force-bearing system. This avoids unstable force transmission caused by loose connections or fatigue wear, thus maintaining a constant pre-tightening force during long-term use and improving the stability and shock resistance of the connection between the lens 10 and the mounting base 20. When a separate structure is used, the abutting part 32 can be disassembled or adjusted independently of the fixing part 31. Users can finely adjust the pre-tightening force by replacing the abutting part 32 with different thicknesses, hardnesses, or shapes. Moreover, during equipment maintenance, only the abutting part 32 can be replaced, avoiding the scrapping of the entire component and reducing maintenance costs.

[0028] like Figure 3As shown, when the fixing part 31 and the abutting part 32 are separate structures, the fixing part 31 has a first groove 311 at the end near the lens 10, and part of the abutting part 32 is disposed in the first groove 311. By forming the first groove on the fixing part 31 and inserting part of the abutting part 32 into it, the abutting part 32 can be limited in both the radial and axial directions, ensuring that the contact position between the abutting part 32 and the end face of the lens 10 is accurate and the force direction is consistent, thereby avoiding assembly eccentricity or tilting. Moreover, it can also ensure that the abutting part 32 will not loosen, shift or fall off when subjected to external vibration or impact.

[0029] like Figure 3 As shown, the inner wall of the first groove 311 has a first positioning member 3111, and the abutment portion 32 is provided with a second positioning member 323. The first positioning member 3111 and the second positioning member 323 cooperate to position the abutment portion 32. By providing the first positioning member 3111 on the inner wall of the first groove 311 and making the first positioning member 3111 cooperate with the second positioning member 323 on the abutment portion 32, the position of the abutment portion 32 can be accurately constrained during the assembly process, so that the abutment portion 32 is in the set position in both the radial and circumferential directions. This avoids the problems of eccentricity, tilting or positional deviation caused by manual assembly and ensures that the force direction on the lens end face is consistent with the optical axis.

[0030] Specifically, in this embodiment, the first positioning member 3111 is a protruding structure and the second positioning member 323 is a groove structure. The positioning of the abutment part 32 is achieved by the cooperation of the protruding structure and the groove structure.

[0031] like Figure 1 and Figure 2 As shown, the mounting base 20 includes a lens mount 21 and a support frame 22, which are fixedly connected. There is a cavity between the lens mount 21 and the support frame 22, and the lens 10 is threadedly connected to the lens mount 21.

[0032] In this embodiment, the lens 10 is threadedly connected to the lens mount 21, and the lens mount 21 is fixedly connected to the support frame 22. This allows the support frame 22 to share some of the load when the device is subjected to external vibration or impact, reducing the possibility of the lens 10 loosening at the threaded connection and preventing the lens 10 from becoming loose, thus ensuring the stability of the infrared core's optical performance. Furthermore, by forming a cavity between the lens mount 21 and the support frame 22, the pre-tightening structure 30 can be placed inside the cavity, ensuring the overall structure is compact.

[0033] like Figure 3As shown, the lens mount 21 has a base 211, a first protrusion 212 and a second protrusion 213. The first protrusion 212 and the second protrusion 213 are located at the two ends of the base 211 respectively. The first protrusion 212 abuts against the support frame 22. The end of the lens 10 near the lens mount 21 is threadedly connected to the second protrusion 213.

[0034] In this embodiment, by providing a circular first protrusion 212 and a circular second protrusion 213 at both ends of the lens mount 21, one end of the lens mount 21 abuts against the support frame 22, and the other end is threadedly connected to the lens 10, which can prevent the lens 10 from becoming loose or the lens mount 21 from deforming. Furthermore, providing the circular second protrusion 213 can increase the length of the connection between the lens 10 and the lens mount 21, that is... Figure 1 The value of 'a' in the equation makes the connection between lens 10 and lens mount 21 more stable.

[0035] like Figure 3 As shown, the infrared core also includes a first fastening structure 40 and a second fastening structure. The lens mount 21 has multiple first connecting holes 214 and multiple second connecting holes 215. The multiple first connecting holes 214 are distributed at intervals along the circumference of the lens mount 21, and the multiple second connecting holes 215 are distributed at intervals along the circumference of the lens mount 21. Each first fastening structure 40 passes through a first connecting hole 214 and is threadedly connected to the fixing part 31. Each second fastening structure passes through a second connecting hole 215 and is connected to the support frame 22.

[0036] In this embodiment, the abutment part 32 is disposed on the fixing part 31, and the fixing part 31 is threadedly connected to the lens mount 21 by the first fastening structure 40. In this way, while ensuring a stable connection between the fixing part 31 and the lens mount 21, the abutment part 32 can be driven to move axially by adjusting the first fastening structure 40, thereby adjusting the magnitude of the axial force applied by the abutment part 32 to the lens 10.

[0037] like Figure 1 and Figure 2 As shown, the infrared core also includes a detector 50. The support frame 22 has a second groove 221 at the end away from the lens 10. The detector 50 is disposed in the second groove 221. The middle of the abutment part 32 and the fixing part 31 both have through channels for connecting the lens 10 and the detector 50.

[0038] In this embodiment, by providing a second groove 221 on the support frame 22 and embedding the detector 50 therein, it is ensured that the optical center of the detector 50 is coaxial with the optical axis of the lens 10. Furthermore, the through-channel in the contact portion 32 and the fixing portion 31 provides an optical path for the imaging light from the lens 10, allowing infrared radiation energy to be transmitted to the target surface of the detector 50 without deviation. It also isolates other radiation energy besides the infrared radiation provided by the lens 10 from entering the through-channel, ensuring image clarity and temperature measurement accuracy. Additionally, the second groove 221 forms an annular support surface in the support frame 22, which can position the detector 50 and prevent it from shifting, deflecting, or loosening under external impacts or vibrations.

[0039] Specifically, the detector 50 includes a first rectangular segment and a second rectangular segment connected to each other. The second rectangular segment is smaller than the first rectangular segment. The connection position between the first rectangular segment and the second rectangular segment has a first stepped surface. The support frame 22 has a support body, a third protruding segment, and a fourth protruding segment. The third protruding segment abuts against the first protruding segment. The two ends of the support body are connected to the third protruding segment and the fourth protruding segment, respectively. The support body has a first support segment and a second support segment connected to each other. The connection position between the first support segment and the second support segment has a second stepped surface. The first stepped surface and the second stepped surface are matched to limit the axial movement of the detector 50.

[0040] Optionally, the outer periphery of the abutment portion 32 also has a buffer portion, which is made of a flexible material to buffer the forces generated during the assembly process and external vibrations.

[0041] In this embodiment, the installation steps of the infrared sensor are as follows:

[0042] First, fix the lens 10 to the lens mount 21 by threaded connection. Then, place the abutment part 32 on the fixing part 31. Then, connect the fixing part 31 and the lens mount 21 by the first fastening structure 40. The distance between the fixing part 31 and the lens mount 21 can be adjusted by adjusting the first fastening structure 40. Then, place the detector 50 in the support frame 22. Finally, connect the support frame 22 and the lens mount 21 by the second fastening structure.

[0043] Alternatively, first place the abutment part 32 on the fixing part 31, then connect the fixing part 31 to the lens mount 21 through the first fastening structure 40, then fix the lens 10 to the lens mount 21 through a threaded connection, and adjust the distance between the fixing part 31 and the lens mount 21 by adjusting the first fastening structure 40. Then place the detector 50 inside the support frame 22, and finally connect the support frame 22 and the lens mount 21 through the second fastening structure.

[0044] An embodiment of this utility model also provides a thermal imager, which includes the aforementioned infrared sensor. Integrating the infrared sensor into the thermal imager ensures stable operation and high-precision imaging in various complex environments. Furthermore, the infrared sensor in this application eliminates external auxiliary structures such as clamps, reducing the overall size of the infrared sensor and making it easier to integrate into the thermal imager.

[0045] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0046] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0047] In the description of this utility model, it should be understood that the directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this utility model. The directional terms "inner" and "outer" refer to the inner and outer contours of each component itself.

[0048] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0049] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this utility model.

[0050] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An infrared sensor, characterized in that, The infrared sensor includes: Lens (10); Mounting base (20), the mounting base (20) has a cavity in the middle, one end of the lens (10) is located in the cavity and is threadedly connected to the mounting base (20); A pre-tightening structure (30) is disposed in the cavity. The pre-tightening structure (30) has a fixing part (31) and an abutting part (32). The fixing part (31) is fixedly connected to the mounting base (20), and the abutting part (32) abuts against the end of the lens (10) connected to the mounting base (20) to apply a pre-tightening force away from the mounting base (20) to the lens (10).

2. The infrared sensor according to claim 1, characterized in that, The abutting part (32) has a main body (321) and a plurality of protruding structures (322). The plurality of protruding structures (322) are arranged circumferentially along the main body (321), and the plurality of protruding structures (322) abut against the end of the lens (10) that is connected to the mounting base (20).

3. The infrared sensor according to claim 1, characterized in that, The fixing part (31) and the abutting part (32) are an integral structure, or the fixing part (31) and the abutting part (32) are separate structures.

4. The infrared sensor according to claim 1, characterized in that, When the fixing part (31) and the abutting part (32) are separate structures, the fixing part (31) is provided with a first groove (311) at one end near the lens (10), and part of the abutting part (32) is disposed in the first groove (311).

5. The infrared sensor according to claim 4, characterized in that, The inner wall of the first groove (311) has a first positioning member (3111), and the abutting part (32) is provided with a second positioning member (323). The first positioning member (3111) and the second positioning member (323) cooperate to position the abutting part (32).

6. The infrared sensor according to claim 1, characterized in that, The mounting base (20) includes a lens mount (21) and a support frame (22), the lens mount (21) and the support frame (22) are fixedly connected, there is a cavity between the lens mount (21) and the support frame (22), and the lens (10) is threadedly connected to the lens mount (21).

7. The infrared sensor according to claim 6, characterized in that, The lens mount (21) has a base (211), a first protrusion (212) and a second protrusion (213). The first protrusion (212) and the second protrusion (213) are located at both ends of the base (211). The first protrusion (212) abuts against the support frame (22). The end of the lens (10) near the lens mount (21) is threadedly connected to the second protrusion (213).

8. The infrared sensor according to claim 6, characterized in that, The infrared mechanism also includes a first fastening structure (40) and a second fastening structure. The lens mount (21) has a plurality of first connecting holes (214) and a plurality of second connecting holes (215). The plurality of first connecting holes (214) are distributed at intervals along the circumference of the lens mount (21), and the plurality of second connecting holes (215) are distributed at intervals along the circumference of the lens mount (21). Each first fastening structure (40) passes through a first connecting hole (214) and is threadedly connected to the fixing part (31). Each second fastening structure passes through a second connecting hole (215) and is connected to the support frame (22).

9. The infrared sensor according to claim 6, characterized in that, The infrared core also includes a detector (50). The support frame (22) has a second groove (221) at one end away from the lens (10). The detector (50) is disposed in the second groove (221). The middle part of the abutment part (32) and the fixing part (31) both have a through channel. The through channel is used to connect the lens (10) and the detector (50).

10. A thermal imager, characterized in that, The thermal imager includes the infrared sensor as described in any one of claims 1 to 9.

Images