Lens module

Abstract

The utility model relates to a lens module, which comprises a front shell assembly, a rear shell assembly and a heat transfer piece, and is characterized in that the front shell assembly comprises a photosensitive circuit board and a lens cone arranged on a photosensitive path of the photosensitive circuit board; the rear shell assembly comprises serial circuit boards arranged on the side, away from the lens barrel, of the photosensitive circuit board at intervals, a heating element installed on the side, facing the photosensitive circuit board, of the serial circuit board and electrically connected to the serial circuit board, and a rear shell covering the serial circuit board and fixedly connected to the lens barrel, and the heat transfer part is fixedly connected to the lens barrel. The heat transfer member passes through the photosensitive circuit board and is in heat transfer connection with the heating element so as to conduct heat of the heating element to the lens barrel. Through effective heat dissipation, the product performance is improved, the imaging quality of the lens module is improved, meanwhile, an existing vehicle-mounted module does not need to be integrally adjusted, the improvement cost is low, implementation is easy, and high practical value and popularization prospects are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to vehicle-mounted module heat dissipation technical field, especially lens module. BACKGROUND

[0002] In the traditional vehicle-mounted module, the heat generating device on the back of the serial board (i.e. the second circuit board) inside the camera can transfer heat through the heat-conducting silicone grease. However, the heat generating device on the front of the serial board (i.e. the side facing the lens) is facing a heat dissipation dilemma. Due to the lack of effective heat dissipation path, heat accumulates inside, which not only affects the product performance, but also has a negative impact on the imaging quality. With the increasing complexity and integration of the vehicle-mounted module, the heat problem is becoming more and more prominent, and if not addressed, it will seriously restrict the development and application of the vehicle-mounted module. SUMMARY

[0003] Based on the problem of heat dissipation difficulty of the heat generating device on the front of the serial board in the existing vehicle-mounted module, it is necessary to provide a lens module.

[0004] The lens module comprises:

[0005] The front shell assembly comprises a photosensitive circuit board and a lens barrel arranged on the photosensitive path of the photosensitive circuit board;

[0006] The rear shell assembly comprises a serial circuit board arranged on the side of the photosensitive circuit board away from the lens barrel, a heat generating element mounted on the side of the serial circuit board facing the photosensitive circuit board and electrically connected to the serial circuit board, and a rear shell body covering the serial circuit board and fixedly connected to the lens barrel; and

[0007] The heat transfer element is fixedly connected to the lens barrel, and the heat transfer element is arranged in the photosensitive circuit board and heat-conductively connected to the heat generating element to conduct the heat of the heat generating element to the lens barrel.

[0008] In this way, since the lens barrel has a large surface area and is mostly made of metal, the heat of the heat generating element on the serial circuit board is transferred in time with the help of the heat transfer element, avoiding the accumulation of heat inside the lens module, which is beneficial to improve the service life of the heat generating element.

[0009] In one of the embodiments, the heat transfer element is arranged spaced apart from the rear shell body.

[0010] In this way, the heat of the heat generating element is only guided towards the lens barrel through the heat transfer element, and will not be directly transferred to the rear shell body, reducing heat diversion and achieving directional guidance of heat.

[0011] In one of the embodiments, the lens module further comprises a heat-conducting coating element located between the heat transfer element and the heat generating element.

[0012] With such an arrangement, the gap between the heat transfer member and the heating element is filled with the introduced coating member, which is beneficial to improving the heat dissipation effect.

[0013] In one embodiment, the heat transfer member has a heat transfer surface heat-transferringly connected to the heating element. The heat transfer member is further provided with a plurality of receiving grooves located on the heat transfer surface. The thermal conductive coating member covers the heating element and fills the receiving grooves.

[0014] Such an arrangement increases the heat transfer area of ​​the heat transfer surface, which is beneficial to improving the heat dissipation efficiency.

[0015] In one embodiment, the width of the accommodating groove gradually decreases from the groove opening to the groove bottom.

[0016] With such arrangement, during assembly, the thermally conductive coating member can be more fully filled in the receiving groove under the squeezing action of the heat transfer member and the heating element, that is, fully fit with the heat transfer surface, which is beneficial to improving the heat transfer efficiency.

[0017] In one embodiment, the photosensitive circuit board is provided with an avoidance hole corresponding to the position of the heating element, and the heat transfer member is a heat transfer column and is passed through the avoidance hole; or

[0018] The photosensitive circuit board is provided with an avoidance gap corresponding to the position of the heating element, and the heat transfer member is a heat transfer column and is passed through the avoidance gap.

[0019] With this arrangement, the avoidance holes or avoidance gaps avoid interference of the photosensitive circuit board with the heat transfer component when assembling the front shell component and the rear shell component. At the same time, the heat transfer component is a heat transfer column with a shorter heat transfer path, which is beneficial to improving heat dissipation efficiency.

[0020] In one embodiment, the lens barrel includes a front housing fixedly connected to the rear housing, a barrel body mounted on the front housing, and a lens group mounted on the barrel body.

[0021] With this arrangement, the front shell and the rear shell structures correspond to each other, and the barrel can be a structure that matches the lens group alone, which simplifies the mold structure required for producing the lens barrel and reduces production costs.

[0022] In one embodiment, the heat transfer member extends from the barrel toward the heating element.

[0023] With this arrangement, the heat of the heating element is directly transferred from the heat transfer column to the cylinder with better heat dissipation effect, which not only facilitates assembly and plugging, but also shortens the heat transfer path.

[0024] In one embodiment, in order to better fit with the barrel of the lens barrel, the side of the heat transfer element away from the central axis of the barrel is flush with the outer peripheral wall of the barrel.

[0025] Such an arrangement not only facilitates the plug-in assembly of the barrel body and the front shell of the lens barrel, but also reduces the difficulty of demoulding during the production of the barrel body.

[0026] In one embodiment, the heat transfer element extends from the front housing toward the heating element.

[0027] In this way, the avoidance gap is arranged to correspond to the position of the heat transfer column, and the number of openings inside the photosensitive circuit board can be reduced as much as possible, which facilitates the arrangement of the electrode wires inside the photosensitive circuit board.

[0028] In summary, the lens module provided by this application has at least the following three advantages:

[0029] 1. Improved product performance. Through effective heat dissipation, the operating temperature of heating devices is reduced, allowing the electronic components inside the vehicle-mounted module to operate in a suitable temperature environment. This reduces problems such as performance degradation and accelerated aging of electronic components caused by high temperatures, extends the product's service life, and improves product stability and reliability.

[0030] Second, it improves the imaging quality of the lens module. Excessive temperatures can affect the performance of imaging-related components in vehicle-mounted modules, such as sensors. Resolving this heat dissipation issue allows the imaging components to operate within a normal temperature range, reducing interference from factors such as thermal noise, and improving image quality indicators such as image clarity and color reproduction.

[0031] 3. High practical value and promotion prospects. The two heat dissipation solutions of this application both utilize the structural characteristics of existing vehicle-mounted modules for improvement, do not require large-scale changes to the overall structural layout, are low-cost and easy to implement, and effectively solve the heat dissipation problem of the heating components on the front of the serial board. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A cross-sectional view of a lens module in one embodiment provided in this application;

[0033] Figure 2 A cross-sectional view of a lens module in another embodiment provided in the present application;

[0034] Figure 3 This is a schematic structural diagram of a heat transfer member connected to one end of a heating element in an embodiment provided in the present application;

[0035] Figure 4 This is a schematic structural diagram of another embodiment provided by the present application in which a heat transfer member is heat-transfer connected to one end of a heating element.

[0036] Reference numerals:

[0037] 10. Front shell assembly; 11. Photosensitive circuit board; 1101. Avoidance hole; 1102. Avoidance gap; 12. Lens barrel; 121. Cylinder body; 122. Front shell; 13. Plug; 20. Rear shell assembly; 21. Serial circuit board; 22. Heating element; 23. Rear shell; 24. Socket; 30. Heat transfer element; 301. Heat transfer surface; 302. Receiving groove; 31. Heat transfer column; 40. Thermal conductive coating element. DETAILED DESCRIPTION

[0038] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0041] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0042] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0044] In traditional vehicle-mounted modules, the heat-generating components (such as the CPU, GPU, electrolytic capacitors, and signal transistors) on the back of the serial board (i.e., the second circuit board) inside the camera can transfer heat through thermal grease. However, the heat-generating components on the front of the serial board (i.e., the side facing the lens) face a heat dissipation dilemma. Due to the lack of an effective heat dissipation path, heat accumulates inside, which not only affects product performance but also has a negative impact on image quality. With the increasing complexity and integration of vehicle-mounted modules, the heating problem has become increasingly prominent. If it is not resolved, it will seriously restrict the development and application of vehicle-mounted modules.

[0045] Based on this, it is necessary to provide a lens module that can achieve timely heat dissipation of the heat-generating components on the front of the serial board.

[0046] See also Figure 1 and Figure 2 , Figure 1 This is a structural diagram of a lens module in an embodiment of the present invention. Figure 2The present invention provides a schematic structural diagram of a lens module according to another embodiment of the present invention. The lens module provided by the present invention includes a front housing assembly 10, a rear housing assembly 20, and a heat transfer element 30. The front housing assembly 10 includes a photosensitive circuit board 11 and a lens barrel 12 arranged in the light-sensitive path of the photosensitive circuit board 11. The rear housing assembly 20 includes a rear shell 23, a serial circuit board 21, and a heating element 22. The serial circuit boards 21 are arranged at intervals on the side of the photosensitive circuit board 11 facing away from the lens barrel 12. The heating element 22 is installed on the side of the serial circuit board 21 facing the photosensitive circuit board 11 and is electrically connected to the serial circuit board 21. The rear shell 23 covers the circuit board and is fixedly connected to the lens barrel 12. The heat transfer element 30 is fixedly connected to the lens barrel 12. The heat transfer element 30 passes through the photosensitive circuit board 11 and is heat-transferably connected to the heating element 22 to transfer heat from the heating element 22 to the lens barrel 12. Since the lens barrel 12 has a large surface area and is mostly made of metal, the heat of the heating element 22 on the serial circuit board 21 is promptly transferred by the heat transfer member 30, avoiding heat accumulation inside the lens module, which is beneficial to improving the service life of the heating element 22.

[0047] Optionally, to optimize the heat dissipation path, in one embodiment provided herein, the heat transfer member 30 is spaced apart from the rear housing 23. That is, after being guided by the heat transfer member 30, the heat from the heating element 22 is transferred only toward the lens barrel 12, and not directly to the rear housing 23. This reduces heat diversion and achieves directional heat guidance. Because the heat from the heating element on the side of the serial circuit board 21 facing away from the photosensitive circuit board 11 has already been drawn out through the rear housing 23, resulting in a higher temperature in actual use, spacing the heat transfer member 30 from the rear housing also cuts off heat transfer between the heat transfer member 30 and the rear housing 23, preventing the high temperature of the heat transfer member 30 from affecting the heat dissipation efficiency of the heating element 22.

[0048] See also Figure 3 and Figure 4 , Figure 3 This is a schematic structural diagram of a heat transfer member 30 connected to one end of a heating element 22 in an embodiment provided in this application. Figure 4This is a schematic structural diagram of another embodiment provided by the present application in which a heat transfer member 30 is heat-transferably connected to one end of a heating element 22. Optionally, in one embodiment provided by the present application, the heat transfer member 30 has a heat transfer surface 301 heat-transferably connected to the heating element 22, and the lens module further includes a thermally conductive coating member 40 located between the heat transfer member 30 and the heating element 22. The thermally conductive coating member 40 may be, but is not limited to, thermally conductive glue and thermally conductive silicone grease. Preferably, in this embodiment provided by the present application, the thermally conductive coating member 40 is made of thermally conductive silicone grease, and thermally conductive silicone grease is pre-applied to the surface of the heating element 22 and the heat transfer surface 301 before assembly. During assembly, the front shell assembly 10 and the rear shell assembly 20 are plugged together so that the thermally conductive silicone grease located on the surface of the heating element 22 and the heat transfer surface 301, respectively, are squeezed and fused. Furthermore, in order to improve the heat transfer efficiency between the heating element 22 and the heat transfer member 30, in the embodiment provided in the present application, the heat transfer member 30 is further provided with a plurality of receiving grooves 302 located on the heat transfer surface 301, and the thermal conductive coating member 40 is filled in the receiving grooves 302. In other words, the heat transfer surface 301 is serrated, which increases the area of ​​the heat transfer surface 301, is conducive to fully absorbing the heat of the heating element 22, and improves the heat dissipation effect. Figure 4 As shown in , these receiving grooves 302 are arranged at intervals, and the groove width of the receiving grooves 302 gradually decreases from the groove mouth to the groove bottom. From another perspective, the entities used to separate the multiple receiving grooves 302 can be regarded as the separating teeth of the sawtooth heat transfer surface 301, and the width of the tooth tip of the separating tooth is smaller than the width of the tooth root of the separating tooth. In this way, during assembly, the thermal conductive coating member 40 can be more fully filled in the receiving groove 302 under the extrusion of the heat transfer member 30 and the heating element 22, that is, it can fully fit with the heat transfer surface 301, which is conducive to improving the heat transfer efficiency. It is understandable that in other embodiments, the receiving grooves 302 can also be arranged in an array to form a checkerboard shape on the heat transfer surface 301, or in a variety of arrangements such as a triangular arrangement or a concentric circle arrangement.

[0049] See again Figure 1 and Figure 2 The lens barrel 12 includes a front shell 122, a barrel 121 and a lens group. The front shell 122 is fixedly connected to the rear shell 23, the barrel 121 is installed on the front shell 122, and the lens group is installed on the barrel 121. The rear shell assembly 20 also includes a socket 24 installed on the side of the serial circuit board 21 facing the photosensitive circuit board 11. The front shell assembly 10 also includes a plug 13 installed on the side of the photosensitive circuit board 11 facing the serial circuit board 21. When the front shell 122 and the rear shell 23 are assembled, the plug 13 is inserted into the socket 24 to realize the electrical connection between the photosensitive circuit board 11 and the serial circuit board 21. In order to shorten the heat dissipation path, the heat transfer element 30 is a heat transfer column 31, and in other embodiments, the heat transfer element 30 can also be bent into a serpentine shape, as long as it does not interfere with the assembly of the front shell assembly 10 and the rear shell assembly 20. In order to facilitate the plug-in assembly of the front shell assembly 10 and the rear shell assembly 20, optionally, asFigure 1 As shown, the photosensitive circuit board 11 is provided with an avoidance hole 1101 corresponding to the position of the heating element 22, and the heat transfer column 31 extends from the barrel 121 toward the heating element 22 and is passed through the avoidance hole 1101. In this way, it is convenient for assembly and plugging, and the heat transfer path is shortened: the heat of the heating element 22 is directly transferred from the heat transfer column 31 to the barrel 121 with better heat dissipation effect. Furthermore, in order to better adapt to the barrel 121, the side of the heat transfer column 31 away from the central axis of the barrel 121 is flush with the outer peripheral wall of the barrel 121. The heat transfer column 31 is sheet-shaped and bends to adapt to the ring shape of the barrel 121. In this way, it is not only convenient to plug and assemble the barrel 121 of the lens barrel 12 with the front shell 122, but also reduces the difficulty of demolding when producing the barrel 121. Optionally, as Figure 2 As shown, the photosensitive circuit board 11 is provided with an escape notch 1102 corresponding to the position of the heating element 22. The heat transfer post 31 extends from the front housing 122 toward the heating element 22 and passes through the escape notch 1102. The arrangement of the escape notch 1102 not only corresponds to the position of the heat transfer post 31 but also minimizes the number of openings within the photosensitive circuit board 11, facilitating the arrangement of the electrode wires within the photosensitive circuit board 11. It is understood that in other embodiments, the side of the photosensitive circuit board 11 near the heat transfer post 31 can be spaced apart from the side wall of the rear housing 23 to form an escape gap with the same avoidance function as the escape hole 1101 or the escape notch 1102.

[0050] Specifically, during actual production, the shape and size of the avoidance hole 1101 or the avoidance gap 1102 on the photosensitive circuit board 11 are firstly precisely designed according to the position and size of the heating element 22. When processing the photosensitive circuit board 11, a high-precision cutting process is adopted to ensure the accuracy of the avoidance hole 1101 or the avoidance gap 1102. Then, thermal conductive glue or thermal conductive silicone grease is pre-applied on the heating element 22, and the assembled front shell component 10 is installed to the rear shell component 20 by mechanical fixation or other means such as gluing. At the same time, the heat transfer component 30 is tightly fitted with the thermal conductive glue or thermal conductive silicone grease on the heating element 22, thereby ensuring that heat can be efficiently transferred to the lens barrel 12.

[0051] In summary, the lens module provided in this application improves product performance and imaging quality of the lens module through effective heat dissipation. At the same time, there is no need to make overall adjustments to the existing vehicle-mounted module. The improvement cost is low and easy to implement, and it has high practical value and promotion prospects.

[0052] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0053] The above-described embodiments only express several implementation manners of the utility model, the description is more specific and detailed, but can not therefore be understood as the limitation of the utility model patent range. It should be pointed out that for ordinary skilled person in the art, without departing from the utility model concept, several modifications and improvements can be made, which belong to the protection range of the utility model. Therefore, the protection range of the utility model patent should be subject to the appended claims.

Claims

1. A lens module, characterized in that: include: A front housing assembly comprising a photosensitive circuit board and a lens barrel provided in a photosensitive path of the photosensitive circuit board; A rear housing assembly includes a serial circuit board spaced apart from the side of the photosensitive circuit board facing away from the lens barrel, a heating element mounted on a side of the serial circuit board facing the photosensitive circuit board and electrically connected to the serial circuit board, and a rear housing covering the serial circuit board and fixedly connected to the lens barrel; as well as A heat transfer member is fixedly connected to the lens barrel, and the heat transfer member is arranged through the photosensitive circuit board and is heat-transferably connected to the heating element to transfer the heat of the heating element to the lens barrel.

2. The lens module according to claim 1, wherein: The heat transfer element is spaced apart from the rear housing.

3. The lens module according to claim 1, wherein: The lens module further includes a heat-conducting coating member located between the heat transfer member and the heating element.

4. The lens module according to claim 3, wherein: The heat transfer member has a heat transfer surface connected to the heating element for heat transfer. The heat transfer member is further provided with a plurality of receiving grooves located on the heat transfer surface. The heat conductive coating member covers the heating element and fills the receiving grooves.

5. The lens module according to claim 4, characterized in that: The width of the accommodating groove gradually decreases from the groove opening to the groove bottom.

6. The lens module according to claim 1, wherein: The photosensitive circuit board is provided with an avoidance hole corresponding to the position of the heating element, and the heat transfer member is a heat transfer column and is passed through the avoidance hole; or The photosensitive circuit board is provided with an avoidance gap corresponding to the position of the heating element, and the heat transfer member is a heat transfer column and is passed through the avoidance gap.

7. The lens module according to any one of claims 1 to 6, wherein: The lens barrel comprises a front shell body fixedly connected to the rear shell body, a barrel body installed on the front shell body, and a lens group installed on the barrel body.

8. The lens module according to claim 7, wherein: The heat transfer member extends from the cylinder toward the heating element.

9. The lens module according to claim 8, wherein: The side of the heat transfer element away from the central axis of the cylinder is flush with the outer peripheral wall of the cylinder.

10. The lens module according to claim 7, wherein: The heat transfer element extends from the front housing toward the heating element.

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