Automatic focusing structure and electronic equipment

Abstract

The utility model discloses an automatic focusing structure and electronic equipment, and relates to the technical field of focusing, the automatic focusing structure comprises a mounting structure and an adjusting mechanism, the mounting structure is used for mounting a lens; the adjusting mechanism is arranged on the mounting structure, the adjusting mechanism is provided with a sensing device, and the adjusting mechanism can adjust the distance between the sensing device and the lens. According to the automatic focusing structure, the adjusting mechanism and the sensing device are integrated on the mounting structure, so that the problem that electric focusing of a small-focal-length lens or a fixed-focal-length lens is difficult to realize is effectively solved, and the imaging flexibility and the user experience are improved.

Description

Technical Field

[0001] This application relates to the field of focusing technology, and in particular to an automatic focusing structure and electronic device. Background Technology

[0002] In the field of imaging, autofocus function usually relies on motorized focusing lenses, which use the cooperation of motors and gears to move the lens along the optical axis, thereby changing the optical parameters and adjusting the focal length.

[0003] However, for short focal length or fixed focal length lenses, achieving motorized focusing becomes extremely difficult due to their size limitations. The small size of these lenses makes it difficult to integrate motors and gear structures, preventing focal length adjustment via traditional motorized focusing methods. This limits the application of autofocus functionality in short focal length lenses, impacting imaging flexibility and user experience. Utility Model Content

[0004] The purpose of this application is to provide an autofocus structure that, by integrating an adjustment mechanism and a sensing device into the mounting structure, effectively solves the problem of difficulty in achieving motorized focusing with small focal length lenses or fixed focal length lenses, thereby improving imaging flexibility and user experience. Another purpose of this application is to provide an electronic device.

[0005] To achieve the above objectives, this application provides an autofocus structure, comprising:

[0006] Mounting structure for mounting lenses;

[0007] An adjustment mechanism is provided on the mounting structure. The adjustment mechanism is equipped with a sensing device and is capable of adjusting the distance between the sensing device and the lens.

[0008] In some embodiments, the adjustment mechanism includes:

[0009] The driving component is located in the mounting structure;

[0010] The motion support is connected to the drive end of the drive assembly, and the drive assembly controls the movement of the motion support in the mounting structure.

[0011] In some embodiments, the driving component includes:

[0012] The driving component is disposed in the mounting structure;

[0013] A drive rod is connected to the drive component. The drive rod is threaded and threadedly engages with the motion bracket.

[0014] In some embodiments, the motion support is provided with a transmission body, the transmission body has an opening for fitting the drive rod, and the transmission body and the drive rod are threaded together.

[0015] In some embodiments, the sensing device includes:

[0016] A sensing device is disposed in the adjustment mechanism;

[0017] A sensing circuit board is disposed in the mounting structure;

[0018] A flexible flat cable is electrically connected to the sensing device and the sensing circuit board.

[0019] In some embodiments, the adjustment mechanism includes a motion support and a mounting bracket connected to the motion support, the mounting bracket having the sensing device and a heat sink in contact with the sensing device; and / or,

[0020] The mounting structure includes:

[0021] The fixed bracket is equipped with the aforementioned adjustment mechanism;

[0022] A board support is connected to the fixed support. The board support is provided with the sensing circuit board and a functional circuit board electrically connected to the sensing circuit board.

[0023] In some embodiments, a limiting mechanism is further included, which is disposed on at least one of the mounting structure and the adjusting mechanism, and the limiting mechanism restricts the range of motion of the adjusting mechanism.

[0024] In some embodiments, the limiting mechanism includes:

[0025] A moving part is provided in the adjustment mechanism;

[0026] A detection circuit board is provided on the mounting structure. The detection circuit board is equipped with a detector, which detects the position of the moving part to limit the range of motion of the adjustment mechanism.

[0027] In some embodiments, the outer side of the lens is provided with an external thread that is threadedly connected to the mounting structure, and the inner side of the lens is provided with an internal thread. The internal thread is threadedly connected to an anti-detachment ring, and the mounting structure limits the adjustment range of the lens by acting on the anti-detachment ring; and / or,

[0028] The adjustment distance of the lens is a, the tolerance of the mechanical back focal length of the lens is c, and the movement distance of the sensing device is d, where d≥2a+c.

[0029] This application also provides an electronic device including the above-described autofocus structure.

[0030] Compared with the above-mentioned background technology, the autofocus structure provided in this application mainly includes a mounting structure and an adjustment mechanism. The mounting structure is used to mount the lens; the adjustment mechanism is located on the mounting structure, and the adjustment mechanism is equipped with a sensing device, which can adjust the distance between the sensing device and the lens.

[0031] In the field of imaging, especially for small focal length or fixed focal length lenses, traditional motorized focusing technology is difficult to apply due to size limitations. These lenses are small enough that it is difficult to integrate motors and gear structures, making it impossible to adjust the focal length using traditional motorized focusing methods. This limits their application in autofocus functionality and affects imaging flexibility and user experience.

[0032] To address this technical problem, the autofocus structure provided in this application achieves autofocus functionality on small lenses through an innovative design. The structure includes a mounting structure, a lens, and an adjustment mechanism. The lens is fixed to the mounting structure, and the adjustment mechanism, which also includes a sensing device, is located on the mounting structure. This design allows the adjustment mechanism to adjust the distance between the sensing device and the lens, thereby achieving autofocus.

[0033] By integrating the adjustment mechanism and sensing device into the mounting structure, this technical solution enables precise control of the sensing device's position to adapt to different imaging needs. This integrated design not only saves space but also simplifies the structure, allowing even lenses with small focal lengths or fixed focal lengths to achieve autofocus. This design overcomes the problem of traditional technologies being unable to achieve motorized focusing due to size limitations, improving lens adaptability and user experience.

[0034] Based on the above description of the structure and process, it can be seen that the autofocus structure has at least the following beneficial effects: by integrating the adjustment mechanism and the sensing device into the mounting structure, the autofocus structure effectively solves the problem that it is difficult to achieve electric focusing for small focal length lenses or fixed focal length lenses, thereby improving the flexibility of imaging and the user experience. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0036] Figure 1 A schematic diagram of the autofocus structure provided in the embodiments of this application;

[0037] Figure 2 An exploded view of the autofocus structure provided in the embodiments of this application;

[0038] Figure 3 This is a partial structural diagram of the installation structure provided in the embodiments of this application;

[0039] Figure 4 A partial structural diagram of the adjustment mechanism provided in the embodiments of this application;

[0040] Figure 5 for Figure 4 Exploded view of the central regulating mechanism;

[0041] Figure 6 A schematic diagram of the fixing bracket and detection circuit board provided in the embodiments of this application;

[0042] Figure 7 A schematic diagram of the lens and anti-detachment ring provided in an embodiment of this application;

[0043] Figure 8 A diagram showing the relationship between the lens and the imaging plane provided in an embodiment of this application;

[0044] Figure 9 A schematic diagram of the mechanical back focal length of a lens provided in an embodiment of this application;

[0045] Figure 10 This is a schematic diagram of a first position of the lens provided in an embodiment of this application;

[0046] Figure 11 This is a schematic diagram of a second position of the lens provided in an embodiment of this application.

[0047] in:

[0048] Installation structure 1, fixing bracket 11, plate bracket 12

[0049] Shot 2

[0050] Adjustment mechanism 3, drive assembly 31, drive component 311, drive rod 312, motion support 32, transmission body 321, positioning bearing 322, mounting bracket 33.

[0051] Sensing device 4, sensing element 41, imaging surface 411, sensing circuit board 42, flexible cable 43

[0052] Limiting mechanism 5, moving part 51, detection circuit board 52, detector 521,

[0053] Anti-detachment ring 6, protrusion 61,

[0054] Heat sink 7

[0055] Functional circuit board 8

[0056] Fastener 9. Detailed Implementation

[0057] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0058] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0059] Please refer to Figure 1 and Figure 2 , Figure 1 This is a schematic diagram of the autofocus structure provided in the embodiments of this application. Figure 2 This is an exploded view of the autofocus structure provided in an embodiment of this application.

[0060] In a first specific embodiment, the autofocus structure provided by the present application mainly includes a mounting structure 1 and an adjustment mechanism 3. The mounting structure 1 is used to mount the lens 2. The adjustment mechanism 3 is located on the mounting structure 1 and is equipped with a sensing device 4. The adjustment mechanism 3 can adjust the distance between the sensing device 4 and the lens 2.

[0061] In the field of imaging, especially for small focal length or fixed focal length lenses, traditional motorized focusing technology is difficult to apply due to size limitations. These lenses are small enough that it is difficult to integrate motors and gear structures, making it impossible to adjust the focal length using traditional motorized focusing methods. This limits their application in autofocus functionality and affects imaging flexibility and user experience.

[0062] To address this technical problem, the autofocus structure provided in this application achieves autofocus functionality on small-sized lenses through an innovative design. The structure includes a mounting structure 1, a lens 2, and an adjustment mechanism 3. The lens 2 is fixed to the mounting structure 1, and the adjustment mechanism 3 is also located on the mounting structure 1 and includes a sensing device 4. This design allows the adjustment mechanism 3 to adjust the distance between the sensing device 4 and the lens 2, thereby achieving autofocus.

[0063] By integrating the adjustment mechanism 3 and the sensing device 4 into the mounting structure 1, this technical solution can precisely control the position of the sensing device 4 to adapt to different imaging needs. This integrated design not only saves space but also simplifies the structure, enabling autofocus even for lenses with small focal lengths or fixed focal lengths. This design overcomes the problem of traditional technologies being unable to achieve motorized focusing due to size limitations, improving lens adaptability and user experience.

[0064] Based on the above description of the structure and process, it can be seen that the autofocus structure has at least the following beneficial effects: by integrating the adjustment mechanism 3 and the sensing device 4 on the mounting structure 1, the autofocus structure effectively solves the problem that it is difficult to achieve electric focusing for small focal length lenses or fixed focal length lenses, thereby improving the flexibility of imaging and the user experience.

[0065] It should be noted that the autofocus structure in this embodiment is not limited to a specific sensing principle, allowing for a wide range of applications. The sensing device 4 can employ different sensing technologies, whether it is based on an infrared detector or a visible light sensor, all of which can be included within the scope of this embodiment.

[0066] In some embodiments, the sensing device 4 includes:

[0067] Sensing device 41 is disposed in adjustment mechanism 3;

[0068] Sensing circuit board 42 is disposed in mounting structure 1;

[0069] The flexible cable 43 is electrically connected to the sensing device 41 and the sensing circuit board 42.

[0070] In this embodiment, the design of the sensing device 4 has two significant features to improve the performance and reliability of the autofocus structure.

[0071] The sensing device 41 and the sensing circuit board 42 are arranged separately. This layout avoids the adverse effects that the heat generated by the sensing circuit board 42 during operation may have on the sensing device 41. Since the sensing device 41 is usually sensitive to temperature changes, this separation design helps to keep the sensing device 41 operating in a relatively stable environment, thereby ensuring the accuracy and stability of the sensing data.

[0072] The use of flexible cable 43 enables electrical connection between sensing device 41 and sensing circuit board 42. This design allows sensing device 41 to move freely under the action of adjustment mechanism 3, while sensing circuit board 42 can be fixed to mounting structure 1. The design of flexible cable 43 satisfies both mechanical structural requirements and ensures reliable electrical connection, which is crucial for maintaining precise control of the autofocus structure during dynamic focusing. In this way, even when sensing device 41 moves to adjust the distance between itself and lens 2, communication with sensing circuit board 42 remains uninterrupted, thereby achieving precise autofocus.

[0073] It should be noted that the sensing device 41 can be either an infrared detector or a visible light sensor, and both should fall within the scope of this embodiment.

[0074] In some embodiments, the lens 2 is threadedly connected to the mounting structure 1, and the distance between the lens 2 and the sensing device 4 is adjusted by rotating the lens 2.

[0075] In this embodiment, the lens 2 is connected to the mounting structure 1 via a threaded connection. This design allows the distance between the lens 2 and the sensing device 4 to be adjusted by manually rotating the lens 2. This adjustment method can be considered a manual focusing function, allowing the user to focus directly by operating the lens 2 as needed. This is very useful in certain emergency or specific situations, such as when the adjustment mechanism 3 loses power, unexpectedly jams, or experiences a circuit failure.

[0076] Meanwhile, under the action of the adjustment mechanism 3, the sensing device 4 can automatically adjust its distance from the lens 2 to achieve autofocus. This means that the autofocus structure not only has the ability to autofocus, but also retains the flexibility of manual focusing. This design allows the autofocus structure to adapt to more application scenarios and user needs, providing an effective solution for both situations requiring fast manual focusing and environments requiring precise autofocus.

[0077] Please refer to Figure 3 , Figure 3 This is a partial structural diagram of the installation structure provided in an embodiment of this application.

[0078] In some embodiments, a limiting mechanism 5 is also included, which is disposed on at least one of the mounting structure 1 and the adjusting mechanism 3, and limits the range of motion of the adjusting mechanism 3 by means of the limiting mechanism 5.

[0079] In this embodiment, the autofocus structure includes a limiting mechanism 5, which can limit the range of motion of the adjusting mechanism 3 in various ways to ensure that it operates within a safe preset range. The limiting mechanism 5 can be mechanical, such as by contact and abutment, to prevent the adjusting mechanism 3 from moving further when it reaches its limit position, thereby avoiding damage that may be caused by excessive movement.

[0080] Alternatively, the limiting mechanism 5 can also employ a detection control method. This involves installing position detectors on or near the adjusting mechanism 3. These detectors can monitor the position of the adjusting mechanism 3 in real time and provide feedback on the position information. Based on this information, the adjusting mechanism 3 can automatically adjust its movement to ensure that it does not exceed the predetermined range.

[0081] The position of the limiting mechanism 5 is flexible. It can be set on the mounting structure 1, on the adjusting mechanism 3, or both of them can be components of the limiting mechanism 5 to achieve more precise matching, limiting, or detection.

[0082] Please refer to Figures 4 to 6 ,in, Figure 4This is a partial structural diagram of the adjustment mechanism provided in an embodiment of this application. Figure 5 for Figure 4 Exploded view of the central regulating mechanism. Figure 6 This is a schematic diagram of the fixing bracket and the detection circuit board provided in the embodiments of this application.

[0083] In some embodiments, the limiting mechanism 5 includes:

[0084] Moving component 51 is located in adjustment mechanism 3;

[0085] The detection circuit board 52 is provided on the mounting structure 1. The detection circuit board 52 is equipped with a detector 521. The detector 521 detects the position of the moving part 51 to limit the movement range of the adjustment mechanism 3.

[0086] In this embodiment, the limiting mechanism 5 consists of a moving part 51 and a detection circuit board 52. The moving part 51 is mounted on the adjusting mechanism 3, while the detection circuit board 52 is mounted on the mounting structure 1. Optionally, the detection circuit board 52 is provided with two detectors 521, which are specifically used to detect the two extreme positions of the moving part 51, ensuring that the moving part 51 can only move between these two extreme positions, thereby limiting the range of motion of the adjusting mechanism 3.

[0087] This design achieves limiting through precise position detection, rather than simple physical obstruction, providing greater flexibility and accuracy. The placement of detector 521 allows for more precise motion control of the adjustment mechanism 3, reducing the risk of damage or malfunction due to excessive movement.

[0088] As an optional implementation, detector 521 can employ grating technology. As a precision detection element, the grating provides high-resolution position information, enabling more precise position control of the moving part 51. The moving part 51 can use a metal baffle to block the grating, causing a change in the electrical signal on the detection circuit board 52. Once the software detects the signal change, it can control the drive unit 311 of the adjustment mechanism 3 to stop or switch between forward and reverse rotation.

[0089] Please refer to Figure 7 , Figure 7 This is a schematic diagram of the lens and anti-detachment ring provided in an embodiment of this application.

[0090] In some embodiments, the outer side of the lens 2 is provided with an external thread that is threadedly connected to the mounting structure 1, and the inner side of the lens 2 is provided with an internal thread that is threadedly connected to the anti-detachment ring 6. The adjustment range of the lens 2 is limited by the action of the mounting structure 1 on the anti-detachment ring 6.

[0091] In this embodiment, the adjustment range of lens 2 is carefully designed to ensure precision and safety. The outer side of lens 2 is equipped with external threads, allowing it to be fixed to the mounting structure 1 via a threaded connection. This threaded connection allows for precise rotational adjustment of lens 2 to change its distance from the sensing device 4, achieving focusing.

[0092] Furthermore, the internal thread on the inner side of lens 2 is threadedly connected to the anti-detachment ring 6. This design serves a dual purpose: firstly, it provides a mechanical locking mechanism to maintain the position of lens 2 on mounting structure 1; secondly, it limits the adjustment range of lens 2. When lens 2 rotates to the limit of its adjustment range, the mounting structure 1 will interfere with the anti-detachment ring 6. This interference is a clear physical limitation, preventing lens 2 from rotating excessively or accidentally detaching from mounting structure 1.

[0093] This design cleverly utilizes the anti-detachment ring 6 to control the adjustment range of the lens 2, ensuring the safety and reliability of the focusing process. Once the lens 2 reaches its preset maximum or minimum adjustment position, the interference between the mounting structure 1 and the anti-detachment ring 6 prevents further rotation, thereby avoiding potential damage to the lens 2 or the sensing device 4.

[0094] In some cases, the anti-detachment ring 6 has a protrusion 61 on its periphery. The number of protrusions 61 can be two, and the two protrusions 61 are arranged symmetrically. The adjustment range of the lens 2 is limited by the mechanical limiting of the protrusions 61 by the mounting structure 1.

[0095] Please refer to Figures 8 to 11 ,in, Figure 8 This is a diagram showing the relationship between the lens and the imaging plane provided in an embodiment of this application. Figure 9 This is a schematic diagram of the mechanical back focal length of the lens provided in an embodiment of this application. Figure 10 This is a schematic diagram of a first position of the lens provided in an embodiment of this application. Figure 11 This is a schematic diagram of a second position of the lens provided in an embodiment of this application.

[0096] like Figure 8 As shown, an imaging surface 411 is formed at the sensing device 41, with the light-inlet side of the lens 2 in front and the imaging surface 411 located behind the lens 2.

[0097] This layout follows the basic principles of optical imaging: light enters from the light-inlet side of lens 2, is focused by lens 2, and converges at sensor 41 to form a clear image; this convergence point is called the imaging surface 411. The function of lens 2 is to capture light from the scene and focus it onto a specific point, namely the imaging surface 411. The imaging surface 411 is the area on sensor 41 that receives the focused light and converts it into electrical signals. These electrical signals can then be further processed to achieve image display or analysis.

[0098] like Figure 9 As shown, the mechanical back focal length of lens 2 is b.

[0099] The mechanical back focal length of lens 2 is defined as the distance from the mechanical rear end of lens 2 to the imaging plane 411, denoted by the letter b. The mechanical back focal length b is a crucial optical parameter that determines the distance relationship between lens 2 and the imaging plane 411 when forming a sharp image. Specifically, the mechanical back focal length b is the distance between the mechanical rear end of lens 2 and the imaging plane 411 when lens 2 is adjusted to a position where an object at infinity from the light-intake side of lens 2 can form a sharp image on the imaging plane 411.

[0100] like Figure 10 and Figure 11 As shown, Figure 10 Lens 2 is in the first extreme position, at which point lens 2 is furthest from mounting structure 1. Figure 11 Lens 2 is in the second extreme position, at which point it is closest to mounting structure 1. Figure 10 In the above, the adjustment distance of lens 2 is a.

[0101] In some embodiments, the adjustment distance of the lens 2 is a, the tolerance of the mechanical back focal length of the lens 2 is c, and the movement distance of the sensing device 4 is d, where d≥2a+c.

[0102] In this embodiment, the autofocus structure is designed to accommodate the focusing needs of lens 2 in different positions. The adjustment distance of lens 2 is set to 'a', meaning that lens 2 can be manually focused by moving back and forth a distance from its mounting position. Simultaneously, considering errors in machining and assembly, the mechanical back focal length 'b' of lens 2 is allowed a tolerance of 'c'. The movement distance 'd' of sensing device 4 is designed to be at least 2a+c, i.e., d≥2a+c.

[0103] This design aims to ensure that the autofocus structure can adapt to the focusing needs of lens 2 in any position, whether lens 2 is manually adjusted to its foremost or rearmost position. Specifically, when lens 2 is in its foremost position, sensing device 4 needs to be able to move a sufficient distance d to ensure that objects from near to far can form a sharp image on imaging surface 411. Since the adjustment distance of lens 2 is a, plus the tolerance c of the mechanical back focal length b, sensing device 4 needs to be able to move at least 2a+c to adapt to these changes, ensuring sharp imaging under all circumstances.

[0104] by Figures 8 to 11 For example, let's define the orientation of lens 2 as right, as explained below.

[0105] Assuming that the distance that lens 2 can move along the optical axis (from left to right in the diagram) when manually adjusted is 'a', that is, the range of distance from the outermost end (rightmost end in the diagram) to the innermost end (leftmost end in the diagram) of the entire device is 'a', then the suggested range of distance that sensing device 4 can move is 2a+c (where c represents the tolerance of the mechanical back cutoff of lens 2). The initial position of imaging surface 411 is determined by the extreme positions of lens 2. Assuming that the mechanical back cutoff of lens 2 is 'b', when the distance from imaging surface 411 to the mechanical back end of lens 2 is 'b', the image at infinity is clear; when the distance from imaging surface 411 to the mechanical back end of lens 2 is 'b+a', the image at close range is clear. When lens 2 is located at the outermost end of mounting structure 1 (the rightmost end in the diagram), the sensor device 4 should be designed so that when it moves to the rightmost position (set as the initial position), the distance between the imaging surface 411 and the mechanical rear end of lens 2 is bc. Moving sensor device 4 c to the left of lens 2 in the diagram away from it will achieve clear imaging at infinity. If sensor device 4 continues to move left by a, it will achieve clear imaging at the closest point. Since the movable range of sensor device 4 is 2a+c, this position setting can satisfy clear imaging at both near and infinity when lens 2 is screwed to the outermost end of mounting structure 1 (the rightmost end in the diagram). Verifying the extreme position when lens 2 is screwed to the innermost end of mounting structure 1 (the leftmost end in the diagram), when lens 2 moves to the innermost end (the leftmost end in the diagram), in the initial position, the distance between the image surface of sensor device 4 and the mechanical rear end of lens 2 is bac. Moving sensor device 4 a+c to the left from the initial rightmost position will satisfy clear imaging at infinity. According to the selected sensor device 4, the movable range is 2a+c. At this time, lens 2 can also move left by a to satisfy clear imaging at near. Therefore, when the lens 2 is at its innermost (leftmost in the diagram) extreme position, the range of motion of the sensing device 4 can enable clear imaging at near and infinite distances.

[0106] In summary, this method can be used to determine the range of motion of the sensing device 4 and the positional relationship between the initial lens 2 and the sensing device 4.

[0107] In some embodiments, the adjustment mechanism 3 includes:

[0108] Drive component 31 is located in mounting structure 1;

[0109] The motion support 32 is connected to the drive end of the drive assembly 31, and the motion support 32 is controlled to move in the mounting structure 1 by the drive assembly 31.

[0110] In this embodiment, the drive assembly 31 is mounted on the mounting structure 1 and serves as the power source for the adjustment mechanism 3, driving the movement of the entire adjustment mechanism 3. The motion bracket 32 ​​is connected to the drive end of the drive assembly 31. Under the control of the drive assembly 31, the motion bracket 32 ​​can move precisely within the mounting structure 1, thereby adjusting the distance between the sensing device 4 and the lens 2.

[0111] Furthermore, the adjustment mechanism 3 also includes a mounting bracket 33 connected to the motion bracket 32. The mounting bracket 33 is provided with a heat sink 7 that contacts the sensing device 41.

[0112] The mounting bracket 33 is connected to the motion bracket 32. It not only supports the sensing device 41 but is also connected to the heat sink 7, which is in direct contact with the sensing device 41. The heat sink 7 presses and fixes the sensing device 41 onto the mounting bracket 33. This design ensures that the heat generated by the sensing device 41 during operation can be effectively conducted to the heat sink 7, thereby keeping the sensing device 41 within a suitable operating temperature range. This is crucial for maintaining the performance of the sensing device 41 and extending its service life.

[0113] In some embodiments, the mounting structure 1 includes:

[0114] The fixed bracket 11 is equipped with an adjustment mechanism 3;

[0115] The board support 12 is connected to the fixed support 11. The board support 12 is provided with a sensing circuit board 42 and a functional circuit board 8 electrically connected to the sensing circuit board 42.

[0116] In this embodiment, the mounting structure 1 consists of a fixed bracket 11 and a plate bracket 12. The fixed bracket 11 is used to fix the adjustment mechanism 3. The drive component 31 of the adjustment mechanism 3 is fixed on the fixed bracket 11 and serves as the power source of the adjustment mechanism 3, responsible for driving the movement of the entire adjustment mechanism 3.

[0117] The motion bracket 32 ​​is connected to the drive end of the drive assembly 31. Under the control of the drive assembly 31, the motion bracket 32 ​​can move within the mounting structure 1. Importantly, there is no fixed connection between the motion bracket 32 ​​and the fixed bracket 11, which means that the motion bracket 32 ​​can move freely on the fixed bracket 11, thereby adjusting the distance between the sensing device 4 and the lens 2.

[0118] The mounting bracket 33 is connected to the motion bracket 32 ​​and also has movable properties, moving together with the motion bracket 32. The mounting bracket 33 is equipped with a sensing device 41 and a heat sink 7 in contact with it, ensuring the stability and heat dissipation of the sensing device 41 during movement.

[0119] The board support 12 is connected to the mounting bracket 11, and it houses the sensing circuit board 42 and the functional circuit board 8 electrically connected to it. This design allows the sensing circuit board 42 to be fixed on the mounting structure 1, while the functional circuit board 8 provides the necessary circuit functions, such as signal processing and power management.

[0120] Alternatively, the sensing circuit board 42 and the functional circuit board 8 can be connected by a connector.

[0121] In some cases, fasteners 9 are used to achieve a fixed connection, such as when the sensing circuit board 42 and the functional circuit board 8 are fixed to the fasteners 9 via the board bracket 12. The fasteners 9 secure the mounting structure 1 to the electronic device.

[0122] In some embodiments, the driving component 31 includes:

[0123] The driving component 311 is mounted on the fixed bracket 11;

[0124] The drive rod 312 is connected to the drive component 311. The drive rod 312 is threaded and is threadedly engaged with the motion bracket 32.

[0125] Optionally, the motion support 32 is provided with a transmission body 321, and the transmission body 321 has an opening to accommodate the drive rod 312, with the transmission body 321 and the drive rod 312 being threaded together.

[0126] Optionally, the motion support 32 is also provided with a positioning bearing 322, which cooperates with the fixed support 11.

[0127] In this embodiment, the drive assembly 31, as the core component of the adjustment mechanism 3, is responsible for providing power and transmitting it to the motion support 32 to achieve precise position adjustment of the sensing device 4. The drive assembly 31 consists of a drive element 311 and a drive rod 312. The drive element 311 is fixed on the fixed support 11 and is typically a motor or other type of drive device responsible for generating power. The drive rod 312, connected to it, is threaded to convert the power of the drive element 311.

[0128] The transmission element 321 on the motion support 32 is fitted onto the drive rod 312 through an opening and is threaded into the drive rod 312 to achieve precise movement along the drive rod 312. This threaded engagement not only transmits power but also ensures the smoothness and accuracy of the movement. In addition, the motion support 32 is also equipped with a positioning bearing 322, which works in conjunction with the fixed support 11 to ensure that the motion support 32 moves linearly along the drive rod 312, avoiding lateral deviation or rotation, and improving the stability and adjustment accuracy of the adjustment mechanism 3.

[0129] In particular, the drive component 311 has the ability to rotate in both forward and reverse directions. When the drive component 311 drives the drive rod 312 to rotate in different directions, the motion support 32 can move in both forward and backward directions.

[0130] In some cases, there are two positioning bearings 322, which are arranged symmetrically to guide the movement between the fixed bracket 11 and the moving bracket 32.

[0131] This application also provides an electronic device including the above-described autofocus structure.

[0132] The electronic device should have all the beneficial technical effects of the aforementioned autofocus structure, which will not be elaborated here.

[0133] Alternatively, the electronic device can be an infrared or visible light handheld device. The sensing device 41 in the sensing device 4 can be either an infrared detector or a visible light sensor, which is not limited here.

[0134] In one specific implementation, the process of using the autofocus structure in the electronic device is described below.

[0135] Pressing the focus button triggers the function circuit board 8, which is electrically connected to the processing chip. The processing chip controls the drive element 311 in the drive assembly 31, which drives the drive rod 312 to rotate. The drive rod 312 is threadedly engaged with the transmission body 321 on the motion bracket 32, which drives the motion bracket 32 ​​to move on the fixed bracket 11 in the mounting structure 1. The movement of the motion bracket 32 ​​causes a change in the position of the sensing device 41 mounted on the mounting bracket 33. The sensing device 41 is electrically connected to the sensing circuit board 42 via a flexible ribbon cable 43, and the sensing circuit board 42 evaluates the image sharpness of the imaging surface 411.

[0136] If the image on the imaging surface 411 is clear, after receiving the signal, the processing chip controls the driving component 31 to stop the rotation of the driving component 311, and the movement stops.

[0137] If the image is unclear, the processing chip controls the drive assembly 31 to continue driving the drive element 311 to rotate. Once the metal baffle moves to the position that blocks the grating, the detection circuit board 52 detects the change in the circuit signal and controls the drive element 311 in the drive assembly 31 to reverse, so as to prevent the motion support 32 from moving excessively.

[0138] It should be noted that many of the components mentioned in this application are general standard parts or components known to those skilled in the art, and their structure and principle can be learned by those skilled in the art through technical manuals or through conventional experimental methods.

[0139] It should be noted that in this specification, relational terms such as first and second are used only to distinguish one entity from several other entities, and do not necessarily require or imply any such actual relationship or order between these entities.

[0140] The autofocus structure and electronic device provided in this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. An automatic focusing structure, characterized in that, include: Mounting structure (1) is used to mount lens (2); An adjustment mechanism (3) is provided on the mounting structure (1). The adjustment mechanism (3) is equipped with a sensing device (4). The adjustment mechanism (3) can adjust the distance between the sensing device (4) and the lens (2).

2. The autofocus structure according to claim 1, characterized in that, The adjustment mechanism (3) includes: The drive component (31) is located in the mounting structure (1); The motion bracket (32) is connected to the drive end of the drive assembly (31), and the motion bracket (32) is controlled to move in the mounting structure (1) by the drive assembly (31).

3. The autofocus structure according to claim 2, characterized in that, The driving component (31) includes: A drive unit (311) is provided on the mounting structure (1); The drive rod (312) is connected to the drive component (311), the drive rod (312) is threaded, and the drive rod (312) is threadedly engaged with the motion bracket (32).

4. The autofocus structure according to claim 3, characterized in that, The motion support (32) is provided with a transmission body (321), the transmission body (321) has an opening for the drive rod (312) to be sleeved, and the transmission body (321) and the drive rod (312) are threaded together.

5. The autofocus structure according to claim 1, characterized in that, The sensing device (4) includes: A sensing device (41) is provided on the adjustment mechanism (3); A sensing circuit board (42) is disposed on the mounting structure (1); The flexible cable (43) is electrically connected to the sensing device (41) and the sensing circuit board (42).

6. The autofocus structure according to claim 5, characterized in that, The adjustment mechanism (3) includes a motion bracket (32) and a mounting bracket (33) connected to the motion bracket (32). The mounting bracket (33) is provided with the sensing device (41) and a heat sink (7) in contact with the sensing device (41); and / or, The mounting structure (1) includes: The fixed bracket (11) is equipped with the adjustment mechanism (3); The board support (12) is connected to the fixed support (11). The board support (12) is provided with the sensing circuit board (42) and the functional circuit board (8) electrically connected to the sensing circuit board (42).

7. The autofocus structure according to claim 1, characterized in that, It also includes a limiting mechanism (5), which is disposed on at least one of the mounting structure (1) and the adjusting mechanism (3), and limits the range of motion of the adjusting mechanism (3) by the limiting mechanism (5).

8. The autofocus structure according to claim 7, characterized in that, The limiting mechanism (5) includes: The moving part (51) is provided in the adjustment mechanism (3); A detection circuit board (52) is provided on the mounting structure (1). The detection circuit board (52) is provided with a detector (521). The detector (521) detects the position of the moving part (51) to limit the range of motion of the adjustment mechanism (3).

9. The autofocus structure according to claim 1, characterized in that, The lens (2) has an external thread on its outer side that is threaded to the mounting structure (1), and an internal thread on its inner side. The internal thread is threaded to the anti-detachment ring (6). The mounting structure (1) acts on the anti-detachment ring (6) to limit the adjustment range of the lens (2); and / or, The adjustment distance of the lens (2) is a, the tolerance of the mechanical back focal length of the lens (2) is c, and the movement distance of the sensing device (4) is d, where d≥2a+c.

10. An electronic device, characterized in that, Includes the autofocus structure as described in any one of claims 1 to 9.

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