Thermal imaging lens module and camera

Abstract

The thermal imaging lens module comprises an adjusting unit, a cover plate, a detector unit, a fixing support and a lens unit, the lens unit is connected with the fixing support, the detector unit is arranged in a cavity on one side, away from the lens unit, of the fixing support, and the cover plate is located at an opening of the cavity. The adjusting unit is arranged on the side, away from the detector unit, of the cover plate. The adjusting unit acts on the cover plate to enable the detector unit to move. In the using process, the adjusting unit is operated and directly acts on the cover plate, so that the cover plate moves, the detector unit can move in the cavity of the fixing support in the moving process of the cover plate, and then definition adjustment is achieved. According to the thermal imaging lens module provided by the utility model, the detector unit is designed to be movable, so that the lens assembly can be clearly focused after being assembled on the front shell assembly, the operation is simple and convenient, the production difficulty is greatly reduced, and the efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of thermal imaging technology, and in particular to a thermal imaging lens module and camera. Background Technology

[0002] Currently, thermal imaging non-motorized zoom lenses on the market are divided into manually adjustable external focus lenses and non-adjustable external focus lenses. Manually adjustable external focus lenses have relatively complex internal structures and are expensive; while non-adjustable focus lenses are relatively complex to use in the production and assembly of the whole machine. When a lens component with a clear focus is installed on the front shell, it is easy to become blurry. In order to ensure the clarity of the camera, the lens needs to be repeatedly adjusted during production, which greatly affects the production efficiency.

[0003] Due to cost considerations, most thermal imaging cameras expose their lenses directly, thus lacking a window made of germanium glass in front of the lens. To ensure the camera's waterproof capability, a waterproof seal is typically required between the thermal imaging lens and the camera's front housing structure. To guarantee reliable waterproofing, this seal needs to be compressed to a certain extent. However, the seal can compress the camera's thermal imaging lens. Therefore, when a clearly focused thermal imaging module is assembled onto the front housing, it can easily lead to a decrease in image clarity, affecting the user experience. Utility Model Content

[0004] The present invention provides a thermal imaging lens module and camera, which solves the technical problem of decreased image clarity after traditional thermal imaging lens modules are assembled into the front shell assembly.

[0005] To address the aforementioned problems, according to one aspect of this application, an embodiment of the present invention provides a thermal imaging lens module, the thermal imaging lens module including an adjustment unit, a cover plate, a detector unit, a fixed bracket, and a lens unit, the lens unit being connected to the fixed bracket, the detector unit being disposed in a cavity on the side of the fixed bracket away from the lens unit, the cover plate being located at the opening of the cavity, and the adjustment unit being disposed on the side of the cover plate away from the detector unit; the adjustment unit acting on the cover plate enables the detector unit between the cover plate and the fixed bracket to move.

[0006] In some embodiments, the thermal imaging lens module further includes an elastic element disposed within the cavity of the fixed bracket.

[0007] In some embodiments, the detector unit includes a detector body and a detector bracket, the detector body being fixed to one side of the detector bracket, and the other side of the detector bracket being in contact with the elastic element.

[0008] In some embodiments, the other side of the detector bracket has a fixing hole, the elastic element is a spring, and a portion of the spring is located within the fixing hole.

[0009] In some embodiments, a guide post is provided in the cavity, and a guide hole is provided on the detector bracket. The guide hole cooperates with the guide post to enable the detector bracket to move up and down in the cavity.

[0010] In some embodiments, the adjustment unit includes a threaded pair and a threaded pair support, the threaded pair support being connected to the fixed support, and the threaded pair passing through the threaded pair support being able to act on the cover plate.

[0011] In some embodiments, the lens unit includes a lens mount, a lens, and a connecting module. The lens is fixed to the lens mount via the connecting module, and the lens mount is connected to the fixing bracket.

[0012] In some embodiments, the connection module includes a locking ring and a locking screw, the lens mount and the lens are connected by threads, the locking ring surrounds the connection between the lens mount and the lens, and the locking screw engages with the locking ring.

[0013] In some embodiments, the thermal imaging lens module further includes two set screws that can pass through different sides of the mounting bracket and act on the detector unit to fix the detector unit in its current state.

[0014] According to another aspect of this application, an embodiment of the present invention provides a camera that includes the thermal imaging lens module described above.

[0015] Compared with the prior art, the thermal imaging lens module of this utility model has at least the following beneficial effects:

[0016] The thermal imaging lens module provided by this utility model includes an adjustment unit, a cover plate, a detector unit, a fixed bracket, and a lens unit. The lens unit is connected to the fixed bracket. The detector unit is disposed in a cavity on the side of the fixed bracket away from the lens unit. The cover plate is located at the opening of the cavity. The adjustment unit is disposed on the side of the cover plate away from the detector unit. The adjustment unit acts on the cover plate to move the detector unit between the cover plate and the fixed bracket.

[0017] In practical use, the operating adjustment unit directly acts on the cover plate, causing it to move. During this movement, the detector unit can move within the cavity of the fixed bracket, thus adjusting the sharpness. Specifically, by moving the detector, the focal length or focus position of the imaging system can be changed, thereby optimizing image quality. The thermal imaging lens module provided by this invention designs the detector unit to be movable, ensuring clear focusing after the lens assembly is assembled into the front housing assembly. Furthermore, it is simple and convenient to operate, greatly reducing production difficulty and improving efficiency.

[0018] The camera provided by this utility model is designed based on the above-mentioned thermal imaging lens module. Its beneficial effects are the same as those of the above-mentioned thermal imaging lens module, and will not be repeated here.

[0019] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is an exploded view of a thermal imaging lens module provided in an embodiment of this utility model;

[0022] Figure 2 This is a schematic diagram of the structure of a thermal imaging lens module provided in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of a thermal imaging lens module from another angle, provided by an embodiment of this utility model;

[0024] Figure 4 This is a schematic diagram of the detector bracket in a thermal imaging lens module provided by an embodiment of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of a fixed bracket in a thermal imaging lens module provided by an embodiment of this utility model;

[0026] Figure label:

[0027] 1. Adjustment unit; 11. Threaded pair; 12. Threaded pair bracket; 2. Cover plate; 3. Detector unit; 31. Detector body; 32. Detector bracket; 33. Fixing hole; 34. Guide hole; 4. Fixing bracket; 41. Guide post; 5. Lens unit; 51. Lens mount; 52. Lens; 53. Connecting module; 531. Locking ring; 532. Locking screw; 6. Elastic element; 7. Set screw. Detailed Implementation

[0028] To further illustrate the technical means and effects adopted by this utility model to achieve its intended purpose, the specific implementation methods, structures, features, and effects according to this utility model application are described in detail below with reference to the accompanying drawings and preferred embodiments. In the following description, different "an embodiment" or "an embodiment" do not necessarily refer to the same embodiment. Furthermore, specific features, structures, or characteristics in one or more embodiments can be combined in any suitable form.

[0029] In the description of this utility model, it should be clarified that the terms "first," "second," etc., in the specification, claims, and drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence; the terms "vertical," "lateral," "longitudinal," "front," "back," "left," "right," "up," "down," "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this utility model, and do not mean that the device or element referred to must have a specific orientation or position, and therefore should not be construed as a limitation of this utility model.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0032] Example 1

[0033] This embodiment provides a thermal imaging lens module, such as Figures 1-5As shown, the thermal imaging lens module includes an adjustment unit 1, a cover plate 2, a detector unit 3, a fixing bracket 4, and a lens unit 5. The lens unit 5 is connected to the fixing bracket 4. The detector unit 3 is disposed in a cavity on the side of the fixing bracket 4 away from the lens unit 5. The cover plate 2 is located at the opening of the cavity. The adjustment unit 1 is disposed on the side of the cover plate 2 away from the detector unit 3. The adjustment unit 1 acts on the cover plate 2 to move the detector unit 3 between the cover plate 2 and the fixing bracket 4.

[0034] Specifically, the adjustment unit 1 mainly functions on the cover plate 2, enabling the detector unit 3 to move. The cover plate 2 primarily prevents damage to the detector unit 3 from direct contact between the adjustment unit 1 and the detector unit 3. The detector unit 3 is the core component of the thermal imaging lens module. It converts the light focused by the lens unit 5 into an electrical signal, thereby achieving imaging. In other words, the detector unit 3 receives the light signal focused by the lens unit 5 and converts it into an electronic signal for further processing and image display. The lens unit 5 collects the infrared radiation emitted by the target object and focuses it onto the detector unit 3, thereby generating a thermal image. The lens unit 5 focuses the infrared radiation through an optical system, enabling the detector unit 3 to accurately capture the temperature distribution on the object's surface and convert it into a visualized thermal image.

[0035] In practical use, the operating adjustment unit 1 directly acts on the cover plate 2, causing the cover plate 2 to move. During the movement of the cover plate 2, the detector unit 3 can move within the cavity of the fixed bracket 4, thereby achieving the adjustment of sharpness. Specifically, by moving the detector, the focal length or focal point position of the imaging system can be changed, thereby optimizing the image quality.

[0036] The thermal imaging lens module provided in this embodiment designs the detector unit 3 to be movable, ensuring that the lens assembly can be clearly focused after being assembled into the front shell assembly, and is simple and convenient to operate, which greatly reduces the difficulty of production and improves efficiency.

[0037] In a specific embodiment, such as Figure 1 As shown, the thermal imaging lens module also includes an elastic element 6, which is disposed within the cavity of the fixed bracket 4. The elastic element 6 in this embodiment primarily functions in the following two ways: First, when the cover plate 2 moves towards the lens unit 5, the elasticity and damping characteristics of the elastic element 6 allow it to absorb mechanical energy and convert it into heat energy, thereby mitigating the impact and vibration caused by the movement and making the movement smoother. Second, when the force applied to the cover plate 2 disappears, the elastic element 6 utilizes its internally stored elastic potential energy to restore itself to its original state through a restoring force, thus allowing the cover plate 2 to return to its initial state.

[0038] In a specific embodiment, such as Figure 1 As shown, the detector unit 3 includes a detector body 31 and a detector bracket 32. The detector body 31 is fixed to one side of the detector bracket 32, and the other side of the detector bracket 32 ​​contacts the elastic member 6. The detector bracket 32 ​​has a general outline of a plate-like structure with a certain thickness, and one side of the plate-like structure has a space that can accommodate the detector body 31.

[0039] The material of the detector body 31 typically has a low coefficient of thermal expansion, but its long length makes it prone to displacement in high-temperature environments. By mounting the detector body 31 on the detector bracket 32, the material properties of the detector bracket 32 ​​(such as titanium alloy) can be utilized to reduce the impact of this displacement, thereby maintaining the thermal stability of the detector body 31. In addition, the arrangement of the detector bracket 32 ​​also avoids direct contact between the detector body 31 and the elastic element 6.

[0040] In a specific embodiment, such as Figure 4 As shown, the detector bracket 32 ​​has a fixing hole 33 on its other side, and the elastic element 6 is a spring, with part of the spring located inside the fixing hole 33. That is, on the side of the detector bracket 32 ​​facing the bottom of the cavity of the fixing bracket 4, there is a circular fixing hole 33. This fixing hole 33 is a blind hole, and the spring is placed inside the fixing hole 33. This arrangement prevents the spring from tilting or shifting. Alternatively, multiple fixing holes 33 can be provided, and correspondingly, multiple springs can be provided, with each fixing hole 33 containing a spring. This arrangement makes the movement of the detector bracket 32 ​​more stable.

[0041] In a specific embodiment, such as Figure 5 As shown, a guide post 41 is provided inside the cavity, and a guide hole 34 is provided on the detector bracket 32. The guide hole 34 cooperates with the guide post 41 to allow the detector bracket 32 ​​to move up and down inside the cavity. There are multiple guide posts 41, which are evenly distributed on both sides of the cavity, and the guide holes 34 correspond one-to-one with the guide posts 41. When the cover plate 2 pushes the detector unit 3 to move, the cooperation between the guide post 41 and the guide hole 34 allows the detector bracket 32 ​​to move inside the cavity. In this embodiment, the cooperation between the guide post 41 and the guide hole 34 can limit the direction of movement, reduce shaking, and allow the detector bracket 32 ​​to move smoothly along a predetermined path, thereby allowing the detector body 31 to move smoothly.

[0042] In a specific embodiment, such as Figure 1 and Figure 2As shown, the adjustment unit 1 includes a threaded pair 11 and a threaded pair support 12. The threaded pair support 12 is connected to the fixed support 4, and the threaded pair 11, after passing through the threaded pair support 12, can act on the cover plate 2. More specifically, the four corners of the threaded pair support 12 are connected to the fixed support 4, and the cover plate 2 and the detector unit 3 are located in the gap between them. The threaded pair support 12 has holes through which the threaded pair 11 can act on the cover plate 2. The threaded pair 11 converts rotational motion into linear motion through threaded transmission. Specifically, the threaded rod (usually a lead screw) and the nut form a helical pair. When the threaded rod rotates, the nut moves along the axial direction of the threaded rod, thereby realizing the linear movement of the cover plate 2. This transmission method has the characteristics of high efficiency and high precision, and can accurately control the position change of the detector.

[0043] In a specific embodiment, such as Figure 1 As shown, the lens unit 5 includes a lens mount 51, a lens 52, and a connecting module 53. The lens 52 is fixed to the lens mount 51 via the connecting module 53, and the lens mount 51 is connected to the fixing bracket 4. In this embodiment, the lens mount 51 is used to fix and support the lens 52, ensuring its mechanical stability in the module and preventing image quality degradation due to loosening. The connecting module 53 is used to achieve a fixed connection between the lens 52 and the lens mount 51.

[0044] In a specific embodiment, such as Figure 3 As shown, the connecting module 53 includes a locking ring 531 and a locking screw 532. The lens mount 51 and the lens 52 are connected by threads. The locking ring 531 surrounds the connection between the lens mount 51 and the lens 52, and the locking screw 532 cooperates with the locking ring 531. The locking ring 531 is a ring-shaped structure with an opening. When the lens mount 51 and the lens 52 are engaged, it is fitted onto the engagement point, and the opening is locked by the locking screw 532. More specifically, the lens 52 and the lens mount 51 are connected by threads, held in place by the locking ring 531, and then fixed by the locking screw 532. The lens mount 51 and the fixing bracket 4 are connected by screws.

[0045] In a specific embodiment, such as Figure 1 As shown, the thermal imaging lens module also includes two set screws 7. These two set screws 7 can pass through different surfaces of the fixing bracket 4 and act on the detector unit 3, thereby fixing the detector unit 3 in its current state. When the detector body 31 is adjusted to a suitable position, tightening the set screws 7 can fix the detector body 31 in its current position.

[0046] The thermal imaging lens module provided in this embodiment operates as follows: First, the lens 52 is screwed into the appropriate position via the threaded connection between the lens 52 and the lens mount 51. At this point, the image is at its clearest state. After the entire module is assembled into the front housing, the image will become blurry due to the compression between the lens 52 and the sealing ring. This is addressed by rotating the threaded pair 11, causing it to push downwards against the cover plate 2 or move upwards, thereby moving the detector body 31 inside the detector bracket 32 ​​up and down. This adjusts the image to its clearest state. Once the image is clear, the set screw 7 is tightened to ensure that the camera does not move internally during transportation or use, thus preventing changes in the back focus and loss of image clarity.

[0047] In this embodiment, the detector bracket is designed to move up and down by using a precision threaded pair with a spring, a fixed bracket, and a guide post between them. When the image is in focus, the position of the detector bracket is firmly fixed by two set screws that are perpendicular to each other, ensuring that the detector bracket will not move under various usage scenarios, thereby ensuring the clarity of the image.

[0048] This embodiment achieves focusing functionality at a lower cost by changing the structure of the thermal imaging lens module. The entire operation is simple and quick, greatly improving production efficiency and reducing the overall cost of the machine.

[0049] Example 2

[0050] This embodiment provides a camera, which includes the thermal imaging lens module described in Embodiment 1.

[0051] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A thermal imaging lens module, characterized by, The thermal imaging lens module comprises an adjusting unit, a cover plate, a detector unit, a fixing support and a lens unit, the lens unit is connected with the fixing support, the detector unit is arranged in a cavity on a side of the fixing support away from the lens unit, the cover plate is located at an opening of the cavity, and the adjusting unit is arranged on a side of the cover plate away from the detector unit; the adjusting unit acts on the cover plate to enable the detector unit to move between the cover plate and the fixing support. 2.The thermal imaging lens module according to claim 1, wherein, The thermal imaging lens module further comprises an elastic member, and the elastic member is arranged in the cavity of the fixing support. 3.The thermal imaging lens module according to claim 2, wherein, The detector unit comprises a detector body and a detector support, the detector body is fixed on one side of the detector support, and the other side of the detector support is in contact with the elastic member. 4.The thermal imaging lens module according to claim 3, wherein, The other side of the detector support has a fixing hole, the elastic member is a spring, and part of the spring is located in the fixing hole. 5.The thermal imaging lens module according to claim 3, wherein, A guide column is arranged in the cavity, a guide hole is formed in the detector support, and the guide hole cooperates with the guide column to enable the detector support to move up and down in the cavity. 6.The thermal imaging lens module according to any one of claims 1-5, wherein, The adjusting unit comprises a threaded pair and a threaded pair support, the threaded pair support is connected with the fixing support, and the threaded pair can act on the cover plate after passing through the threaded pair support. 7.The thermal imaging lens module according to claim 1, wherein, The lens unit comprises a lens seat, a lens and a connecting module, the lens is fixed on the lens seat through the connecting module, and the lens seat is connected with the fixing support. 8.The thermal imaging lens module according to claim 7, wherein, The connecting module comprises a locking ring and a locking screw, the lens seat and the lens are connected through threads, the locking ring surrounds the connection between the lens seat and the lens, and the locking screw cooperates with the locking ring. 9.The thermal imaging lens module according to claim 1, wherein, The thermal imaging lens module further comprises two sets of setscrews, the two sets of setscrews can pass through different surfaces of the fixing support and act on the detector unit, so that the detector unit is fixed in the current state.

10. A video camera characterized by comprising: The camera comprises the thermal imaging lens module according to any one of claims 1-9.

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